Vehicle hub and manufacturing method thereof
Technical Field The invention relates to a vehicle hub and a manufacturing method. thereof. Background Art For example, in, (in which a pair of groove portions) are provided on the rising wall of the recessed portion in the longitudinal direction of the hub, and the end portions of the respective edge portions of the secondary air chamber member are fitted (are provided on the rising wall of the recessed portion along the circumferential direction of the wheel hub, respectively 1). and: are provided . The main chamber member, is provided with a main air, chamber; formed on the inner side in the longitudinal direction of, the hub. , The secondary air chamber member is attached to the outer peripheral surface, of the depressed portion by embedding both edge portions in a pair of groove portions, respectively. Prior art documents Patent document Patent Document 1: Japanese Patent Laid-Open No. 5657309. However, in the conventional hub (, for example, Patent Document 1) has a problem, that the size, of the main body portion in the width direction of the hub is limited by the edge portion so, that the volume of the sub air chamber formed in the main body portion cannot be sufficiently, secured by the flange portion. In addition, the cutting process of the groove portion has to change the cutting tool, every time the groove portions in the pair of grooves are formed, and thus, has a problem, that the forming process of the groove portion becomes complicated and the manufacturing cost of the hub increases. Content of the invention , Provide a vehicle hub having a resonator (sub-chamber component), capable of securing a volume of a secondary gas cell and a manufacturing method. thereof, which can reduce the manufacturing cost. , The vehicle hub according to the present invention has: pair of guide rail members, separated from each other by; and a pair of guide rail members, disposed between the pair of guide rail members spaced apart from each other in a radial direction from the outer periphery of the depressed portion toward the radially inner side of the hub . The pair of rail members is formed so as to be spaced apart from each other radially outward from the outer periphery of the recessed portion. , The method for manufacturing a vehicle hub according to the present invention includes, steps: first of arranging the pair of guide rail members at predetermined positions, and; of the outer peripheral surface of the depressed portion, and then fixing the pair of guide rail members to the outer peripheral surface second first of the depressed portion after the . step. Effects The vehicle hub and the method, of manufacturing the same according to the present invention have a resonator (sub-chamber component), that can more secure the volume of the secondary air chamber than in the conventional art, and can reduce the manufacturing cost, of the hub. Description of drawings 1 Is a partially enlarged perspective, view of a vehicle hub according to an embodiment of the present invention. 2 Is an exploded perspective view, of a vehicle hub according to an embodiment of the present invention. 3 Is 1, and FIG. III-III is a cross-sectional view, of a wheel hub for a vehicle shown in FIGS. 4 To (a) are manufacturing process diagrams (c). of a vehicle hub. 5 Is a view, (a) illustrating a configuration of a vehicle hub first according to a modification example of FIG. (b); and second (.) is a view illustrating a structure of a vehicle hub according to a modification example of the vehicle. Reference numerals 1 Vehicle wheel hub 1a Vehicle wheel hub 1b Vehicle wheel hub 2-hub main body 9 Tire air chamber 10 Auxiliary air chamber component 10a Auxiliary air chamber component 11 Rim 11c Concave lower part 11d Outer peripheral surface 12 Bead seat 13 Body part 15a Mm 1 longitudinal wall 15b Mm 2 longitudinal wall 16 Partition wall 18 Pipe body 18a Communication hole 19a Clamping protrusion 19b Engaging hole 20 Guide rail part 20a Guide rail part 20b Guide rail part 21 Base 22 Support 25a Upper plate 25b Bottom plate 25c Side plate 25d Side plate 27 Bulge 33 Bridging member 33a Upper side joint part 33b Lower side joint part J Splice site SC Auxiliary air chamber X Hub circumference Y Hub width direction Z Hub radial Mode of execution Next, with reference to the drawings, a vehicle hub for carrying out the method (according to Embodiment) of the present invention is described, in detail with, and, "X" in the attached drawings indicates that the hub circumferential, "Y" represents the hub width direction, "Z" and represents the hub radial. The vehicle hub according to the present embodiment is mainly characterized in, that a pair of guide rail members, fixed to the outer peripheral surface of the depressed portion of the rim is fixed to the outer peripheral surface, of the concave portion in the hub, sub-chamber member so as to be radially inward of the hub of the pair of rail members. , An overall configuration of a vehicle hub will be described first, and then, a guide rail member and a secondary air chamber member will be described. Integral structure ＜ of hub for ＞ vehicle 1 Is a partially enlarged perspective view 1 of the vehicle hub, according to the present embodiment, and FIG. 20 is a partial enlarged perspective view of an outer peripheral surface 11c attached to the recessed portion 11d by, the guide rail member 10 as a resonator. As 1 shows, the rim 1 according to the present embodiment is assumed to be a molded article, by attaching a secondary gas cell member 11 made of synthetic resin such as polypropylene, polyamide to a rim 10( made of light metal such as aluminum alloy) magnesium alloy, as the cast, guide rail member 11 in addition, as a light metal member 20 made of the same light metal as the rim 11, FIGS. 10. shows the, present embodiment. , And 1, while the illustration, is omitted, the disk portion Y connecting the rim 11 and the hub is disposed on the left side of the paper sheet in the width direction, of the hub. The rim 11 has, between the bead seats Y formed at both ends of the hub width direction 12, 12, a concave lower portion 11c. depressed toward the inside of the hub, and an outer peripheral surface 11c of the concave lower portion 11d defined by the bottom surface of the recess being substantially the same diameter Y in the hub width direction. The rim 11 according to the present embodiment includes a first longitudinal wall 1 and a second longitudinal wall 15a, and the longitudinal walls 2 rise 15b. from the outer circumferential surface 15a, 15b toward the outer side Z of the hub radial Y at predetermined intervals in the hub width direction. 11d. , Nd and 1 th vertical walls 15a and 2 in the present embodiment are assumed to be formed by extending from the outer circumferential surface 15b of the concave lower portion 11c toward the rim flange side 11d, that is, longitudinal walls, extend annularly along the hub circumferential direction 15a, 15b at predetermined intervals from each other, so as to oppose X. ＜ Guide rail part ＞ As shown 1 in, the rail member 20 of the present embodiment includes a pair of guide rail members 20a and rail members 20b, respectively,and 20a, 20b disposed on both sides 10 of the hub width direction Y of the secondary air chamber member. The guide rail member 20a is disposed 1 adjacent to the first longitudinal wall 15a in the hub width direction inner side 1 of the second vertical wall 15a, and in the following description . the guide rail member, 15b is sometimes referred to as a guide rail member. 20b, only 2 if the 20a, 20b guide rail members 15b are not particularly distinguished from 20. the first longitudinal 20a, 20b wall 2. 2 Is an exploded perspective view 1 of a vehicle hub, according to an embodiment of the present invention and includes a guide rail member 20 and a secondary air chamber member 10. The rail member 20 is a curved member X extending along the hub circumferential. The length of the hub circumferential 20 of the rail member X in the present embodiment is set to be substantially the same as the length 10 of the hub circumferential 13 of the main body portion X of the sub-chamber member, described later. 3 Is 1, and FIG. 1 is a sectional, view III-III of a wheel hub for a vehicle shown in FIGS. As shown 3 in, the rail members 20a, 20b in the present embodiment sandwich the sub-chamber members 10 in the middle to form a symmetrical shape. Each of the rail members 20a, 20b has a base 21 and a support portion 22. formed of a plate, and, is curved in a cross-sectional view intersecting the extending direction 21, that is 22 in a cross section, intersecting the hub circumferential (, that is, in a cross section along the hub radial, i.e. (X curved in a zigzag,)-shaped rod). shape Z. The base 21 is configured 11c in a manner along the outer circumferential surface 11d of the concave lower portion. The support portion 22 is formed 21 such that the end portion inside the hub width direction Y of the base portion Y rises obliquely upward toward the inside of the hub width direction. That is, supports the portion 22 so as to gradually displace toward the outside of the hub radial Y toward the inside of the hub width direction Z. The respective support portions 20a, 20b of the rail members 22 in this embodiment are assumed to be equal 21 to each other at an angle (with the base); however, each of, guide members, may have an angle at which the support portion 20a, 20b and the outer peripheral surface 22 of the concave lower portion 11c Y are formed at an acute angle such that they do not differ from each other. 11d. With respect to the vehicle hub 20 having such rail members 1, the distance between the support portions 20a, 20b of the rail members 22 gradually narrows 11c away from the outer peripheral surface 11d of the recessed portion Z toward the radially, side of the hub. Further, the side plate 10 of the secondary air chamber member 25c described later is disposed 20a, 20b along the inner side surface Z of the hub radial 22a of the pair of rail members, such that, auxiliary air chamber members. 10 are supported 22 by the support portion as will be described later. As illustrated 2, engaging projections 20a and engaging holes 22 are formed in the supporting portion 10 of the guide rail member 25c, which are fitted into the side plate 19a of the sub chamber member 19b. to be described later, and constitute 19a circumferential displacement restricting portions 19b that restrict the displacement of the secondary air chamber member 10 " toward the hub circumferential ". X. This rail member 20a, 20b fixes only both ends of the hub circumferential X to the outer peripheral surface (FSW:Friction Stir Welding) of the concave lower portion 11c by friction stir welding 11d. and, in FIG. 1 illustrates only the joint portion, on the paper surface side of 20a, 20b in order to facilitate drawing. J, and the description, J thereof is omitted for drawing. ＜ Secondary air chamber component ＞ Next, the sub chamber member 10( will be described 2) with reference to FIG. As shown 2, the secondary air chamber member 10 is a member, having a main body portion 13, and a tube 18. body 18a in which a communication hole is formed in one direction. The secondary air chamber member 10 is formed in a symmetrical shape by a partition wall 13 extending in the hub width direction Y at the center of the main body portion 16 in the hub circumferential direction X. The main body portion 13 is bent, in its longitudinal direction, i.e. main body portion 13 follows hub circumferential 10 when secondary air chamber member 11c is mounted on outer peripheral surface 11d of concave lower portion X. The hollow part 13 is hollow in . and the hollow part (omits the illustrated) to form an auxiliary air chamber SC( described later with reference to FIG. 3). and 16 divides the partition wall X into a groove-like depression in the hub width direction, with the partition wall, being formed 16 and 25a, although the illustration 25b is omitted, and the partition wall Y 16, is formed between the upper 25a plate, and the 25b. bottom plate, in a groove-like depression. 3 Is 1, and FIG. 1 is a sectional, view III-III of a wheel hub for a vehicle shown in FIGS. As FIG. 3 shows, the main body portion 10 of the secondary air chamber member 13 has an isosceles trapezoid shape with a longer hub width direction (in a cross section perpendicular to the hub circumferential 1 of FIG. X) in the longitudinal direction Y. , The, main body portion 13 includes an upper plate 25a, base plate 25b and a side plate 25c. The base plate 25b is formed 11c by a plate body formed so as to be substantially flat along the outer peripheral surface 11d of the depression. or, base plate 25b so as to be substantially flat in the hub width direction Y and, base plate 20a, 20b is formed to be substantially the same curvature as the outer peripheral surface (25b with 1) reference to FIG. X() in the hub 11d circumferential direction, and is formed, substantially the same. The upper plate 25a is bent 25b at a predetermined curvature in the hub circumferential X( with respect to the base plate 1) at a predetermined interval with reference to FIG. The height 25a of the upper plate 11d from the outer circumferential surface 20a, 20b is set to be substantially the same as the outer peripheral edge Z of the hub radial 22b in the rail member . that is, of the upper plate 25a in the hub width direction Y is set substantially the same as the outer peripheral edge 20a, 20b in the rail member 22b. An auxiliary air chamber 25a is formed between the upper plate 25b and the bottom plate SC. The side plate 25c extends 25b at the end of the base plate Y at 25a ends toward the end of the upper plate . and, side plate 25c is connected 25a to the end of the upper plate. The, pair of side plates 25c thus adjoin. 20a, 20b in a manner along the radially inner side 22a of the hub in the rail part, respectively. In other words, the sub chamber member 10 and the pair of rail members 20a, 20b are fitted to each other at intervals, such that the width 11c of the main body portion 11d of the secondary air chamber member 10 gradually expands 13 in the width direction (of the wheel hub in the width direction of the hub portion Y close to the outer peripheral surface). , Shown 2, the main body portion 13 has an upper plate X and a side plate 25a connected to the bottom plate 25b at the end of the hub circumferential 25d. In, in order to facilitate the drawing 10, the side plate 16 according to the present embodiment is disposed at a position X symmetrical to each other in a paired manner in the longitudinal direction. 25d of the main body portion 13, although the (illustration, is omitted for the sake of X) convenience . although not shown in the drawing. , And 2, as shown, the main body portion 13 is formed X such that a plurality of bridge members 33 are arranged at equal intervals in the hub circumferential . and the bridge members 33 are arranged in two rows Y in the hub width direction. As shown 3, the bridge member 33 is formed 33a by engaging the upper joint 33b and the lower joint 25a at a substantially central position between the upper plate 25b and the bottom plate. In addition, the upper coupling portion 33a and the plate 25a are partially recessed toward the bottom plate 25b side . and the lower coupling portion, is formed 33b so that the bottom plate 25b is partially recessed toward the upper plate 25a. side. The bridge member 33 is substantially cylindrical, the upper plate 25a and the bottom plate 25b are partially joined . and, the bridge member 33 is formed in a circular opening 13 when viewed from above in the vertical direction of the main body portion. Next, the tube body 18( will be described 1) with reference to FIG. As shown 1, the tube body 18 is formed 13 so as to project from the main body portion Y in the hub circumferential direction, at a position in the main body portion 13 that is offset from one side of the hub width direction X. As described above, the tubular member 10 of the present embodiment has the partition wall 16 symmetrical in shape X in the hub circumferential direction, such that, shown 2 in the longitudinal direction 18 of the body portion 13 are disposed at positions (spaced apart from each other at substantially X) intervals with respect to each other with the hub shaft as a center in the circumferential direction. FIGS . 18 are respectively arranged in a pair-wise manner in the 90° axial direction of, the wheel hub. In addition, as shown 2, a communication hole 18 is formed inside the pipe body 18a. to make the subsidiary air chamber 18a formed inside the body part 13 refer to FIG. SC( and the tire air chamber 3), formed on the concave lower part 11c( and FIG. 3) with the tire (shown) to communicate 9( with FIG. 3). ＜-hub manufacturing method ＞ 1 Is a diagram, illustrating a method of manufacturing the vehicle hub according to the present embodiment. The manufacturing method of the vehicle hub 1 according to the present embodiment includes: first steps, of referring to FIG. 10( to the outer peripheral surface 2) of FIG. 11c( with reference to FIG. 2) and 11d(, and a step 2) of fixing a pair of guide rail members; to the outer peripheral surface second of the concave lower portion, 2) with reference to 11d. FIG. first after the 11c 20a, 20b( step. 4 To (a) of FIG. 4 are manufacturing process diagrams (c) of the vehicle hub 1. In this manufacturing method, as shown 4 in FIG. (a), a sub chamber member 2 is disposed on a previously prepared hub main body 10( first in a step). The hub main body 2, is assumed to have a structure of the rim 11( with reference to 1), and, the hub main body, can also use a commercially available product, 2 as long as the hub main body is configured such that the rim. 11 is provided. In the manufacturing method of the present embodiment, the secondary air chamber member 10 is disposed at substantially the center portion 11c of the hub width direction 11d on the outer peripheral surface Y of the concave lower portion. , In this manufacturing method, as shown 4 in FIG. (b), a pair of guide rail members, are prepared in advance 20a, 20b. These rail members 20a, 20b are fixed 24 by clamps, at predetermined intervals from each other for facilitating the drawing, of the jig 4 shown (b) in FIG. 24 with a dashed (double dash-dotted) representation. To such a jig 24, the positioning accuracy 20a, 20b of the rail member 10 with respect to the secondary air chamber member, can be improved, and the positioning accuracy 20a, 20b of the rail member 11c to the outer peripheral surface 11d of the concave lower portion, can be improved. , The jig, in the present embodiment is assumed to be formed of an elongated plate and fastened 24 with respect to the rail member 20a, 20b; however, the jig, is detachably connected to each other by the rail members 24 spaced apart from each other, and the engagement manner with respect to the rail member 20a, 20b 20a, 20b is not particularly limited . , In this manufacturing method, as shown 4 in FIG. (c), a pair of guide rail members 20a, 20b are fixed to the outer peripheral surface 11c of the concave lower portion 11d( second respectively). In particular, the rail members 24 fixed by the jig 20a, 20b are spaced apart by a predetermined interval 22 such that the respective supporting portions 10 engage with the side plates 25c of the sub chamber member, in the, position in the engaging holes 20a formed in the guide rail member 19b( in FIG. 2) with reference 19a( to FIG. 2). 10. Further, as described above, the hub circumferential 20a, 20b of the guide rail member X( is fixed 1) with friction stir welding with respect to both ends of FIG. 11d with reference to FIG. (1). Further, in 4 of FIG. (a), the jig (shown by the dashed) double-dashed line 24 is detached 20a, 20b from the rail member 11d after the guide rail member 20a, 20b is fixed to the outer peripheral surface. ＜ Action effect ＞ , Is a diagram 1 illustrating an operational effect of the vehicle hub, according to the present embodiment. The vehicle hub 1 of the present embodiment fixes the secondary air chamber member 11c to the rim 11d by a pair of guide rail members 20a, 20b that are separately fixed with respect to the outer circumferential surface 10 of the recessed portion 11. To such a vehicle hub 1, unlike the conventional vehicle hub (, for example, unlike Patent Literature 1), it is not necessary to cut the groove, for fixing the resonator on the rising wall of the depressed portion, whereby, the vehicle hub, can reduce the manufacturing cost 1. , In the vehicle hub 1, sub-chamber members 10 are formed 20a, 20b so as to extend along the inner side surfaces Z of the hub radial 22a of the pair of rail members. , Auxiliary air chamber member 10 and a pair of guide rail members 20a, 20b are fitted to each other at intervals, so as to gradually expand the width of secondary air chamber member 11c as approaching peripheral surface 11d of concave lower portion 10. However, in the conventional vehicle hub (, for example, Patent Document 1) uses a plate-shaped edge portion extending from both sides of the main body portion to limit the size, of the main body portion in the width direction of the hub by these edge portions, and, in the conventional, vehicle hub cannot sufficiently secure the volume of the sub air chamber formed in the main body portion. In contrast to, the vehicle hub 1 according to the present embodiment directly supports the side plate 13 of the body portion 25c on the inner side 20a, 20b 22a of the rail member. The vehicle hub 1, according to the present embodiment is not limited (to the conventional vehicle hub 1), for example, unlike Patent Literature, 13 body parts Y are not limited in size in the hub width direction. , Vehicle hub 1 can expand 13 the size of main body portion Y in wheel hub width direction . thereby, vehicle hub 1 can ensure that volume 10 of secondary air chamber SC can exhibit more excellent muffling performance,than in the past. , Is different from the conventional vehicle hub 1 in the vehicle hub, because the centrifugal force 20a, 20b acts on the front end of the secondary air chamber member 22a so 10 that the centrifugal force is dispersed. or, according to such a vehicle hub 1, for example, to improve the retaining performance (of the secondary air chamber member 1), when the hub is rotated by this kind 1, of vehicle wheel hub (see Patent 11c Document,) 11d, for example, 10. by a centrifugal force. In addition, in such a vehicle hub 1, the engaging protrusion 10 formed in the secondary air chamber member 19a is fitted into the engaging hole 20a of the rail member 19b so as to restrict the displacement, of the secondary air chamber member 19a toward the hub circumferential 19b( when the hub is rotated, thereby), vehicle hub 10 can more reliably improve the retaining performance X 1 of the secondary air chamber member 11c 10 . 11d with respect to the, concave lower portion. In addition, the circumferential displacement restricting portion is formed on both the rail member 20 and the sub chamber member 10; however . the circumferential displacement restricting portion is formed, at least either of the rail member 20 and the sub chamber member 10. The, circumferential displacement restricting portion can also be constituted by a rib 20 extending from the end surface of the hub circumferential X of the rail member 10 to the end surface of the hub circumferential X of the secondary air chamber member (, and the rib portion extending from the end surface of the hub circumferential) X of the secondary air chamber member 20. toward the hub X circumferential, of the () rail member . is omitted. 10. , In such a vehicle hub 1, guide rail member 20 is friction stir welded 11c with respect to outer peripheral surface 11d of concave portion. To this vehicle hub 1, even when the rim 11 and the rail member 20 are formed of an aluminum alloy or the like that is difficult to weld with each other, it can be firmly joined, in a simple process. , Of the vehicle hub 1 fixes the guide rail member 10 to the outer peripheral surface 11c of the concave lower portion 11d after the secondary air chamber member 20 is disposed on the outer peripheral surface 11c of the concave lower portion 11d. To this manufacturing method, the positioning 10 of the secondary air chamber member 11c with respect to the outer peripheral surface 11d of the concave lower portion, and the positioning of the rail member 20 with respect to the predetermined rail member 11d on the outer circumferential surface 20 can be performed simultaneously, to simplify the manufacturing process, of the vehicle hub 1. , In second the guide rail members 24 are fixed 20a, 20b at predetermined intervals by the jig. To this manufacturing method, the positioning accuracy 20a, 20b for fixing the guide rail part 11d on the outer circumferential surface 20a, 20b of the guide rail parts, in a predetermined design can be further improved. In particular, the manufacturing method of the present embodiment contemplates that the friction stir welding, is applied to the rail member 20a, 20b to apply a tool load, in the manufacturing method, and the jig 24 exerts a large acting effect. , Illustrates, but the present invention is not limited to the above-described embodiment, and, can be implemented in various ways. 5 And (a) of FIG. (b) to be referred to next are structural explanatory diagrams, of a vehicle hub according to a modification. As 5 shown in FIG. (a), first the vehicle hub 1a is bent 20a, 20b so that the support portion 22 of the rail member X( projects toward the outer side of the hub radial 1) when the hub circumferential Z intersects with FIG. in a cross-sectional view. , Subsidiary air chamber members 10a are formed 22 so as to extend radially Z of the hub portion. Such a vehicle hub 1a and a vehicle hub 11d having a rail member 20( supporting portion 22) inclined with respect to the outer circumferential surface 1( can more secure the volume 3) of the secondary air chamber SC as compared with FIG. , In such a vehicle hub 1a, the front end, upper end 22 of the support portion (can be extended 22c) toward the inside of the hub width direction Y. Such a vehicle hub 1a, enables the upper end 22 of the support portion 22c to cover a portion 10 of the upper plate 25a of the secondary air chamber member, so, that the number of columns Y of the bridge member 33 arranged in the hub width direction, can be reduced. As 5 in FIG. (b), second the secondary air chamber member 1b of the vehicle hub 10 has a bulging portion 20a, 20b that bulges outward from the front end (upper end 22c) of the rail member Z toward the outer side of the hub radial 27. To such a vehicle hub 1a, the volume 27 of the secondary air chamber SC can be more secured by the bulging portion. The jig 24( used in the above-described embodiment is detached 4 from the rail member (c)) with reference to 20a, 20b of FIG. 11c after the guide rail member 11d is fixed to the outer peripheral surface 20a, 20b of the concave lower portion. However, the vehicle hub 1 according to the present embodiment may be configured to include a restricting portion 20a, 20b that regulates the interval between the guide rail members. Although not shown, for example, a groove 20a, 20b in which the base 21 of the rail member 11c is fitted to the outer peripheral surface 11d of the recessed portion (may be provided), such that the bolt 11c or the coupling rail member 11d engaging the rail member 20a, 20b protruding from the outer circumferential surface, of the concave lower portion. 20a, 20b is connected to each other. In addition, the length of the hub circumferential 20 of the rail member X is set 10 substantially as described above, but, of the guide rail member, may be set to be substantially shorter 20 than the secondary air chamber member 10 as long. To, the manufacturing method 1 of the vehicle hub (according to the embodiment described above does not exclude the configuration 4) in which the end of the guide rail member, fixed to the outer peripheral surface 10 is slid along the hub circumferential 11c and mounted to the rail member 11d. 20a, 20b and 11d are described. 20a, 20b after the secondary air chamber member X, is disposed on the outer peripheral X surface, of the recessed, lower portion 11d 20a, 20b. A vehicle wheel includes: a pair of rail members configured as separate members from the rim and fixed to an outer circumferential surface of a well portion of a rim; and a sub air chamber member serving as a Helmholtz resonator and disposed between and supported by the rail members. A distance between the pair of rail members in a wheel width direction becomes gradually narrower from the outer circumferential surface of the well portion toward outside in a wheel radial direction that is orthogonal to the wheel width direction. Further, the pair of rail members have inner surfaces located to face the outer circumferential surface in the wheel radial direction, and the sub air chamber member has a contour to conform with the inner surfaces of the pair of rail members. 1.The vehicle hub, is characterized by, having : A pair of guide rail members, are separately fixed; to the outer circumferential surface of the depressed portion. The secondary air chamber member, as a resonator is disposed between the pair of guide rail members and supported, by the pair of guide rail members. The distance between the pair of guide rail members gradually narrows, away from the outer periphery of the depressed portion toward the outer side in the radial direction of the hub. The secondary air chamber member is formed, so as to be radially inward of the hub of the pair of guide rail members. 2.The vehicle hub according to Claim 1, is characterized in, that the sub-air chamber member and the pair of guide rail members are arranged at intervals, to gradually increase the width of the secondary air chamber member in accordance with the outer circumferential surface of the depressed portion. 3.The vehicle hub according to Claim 1, is characterized in that, the guide rail member is bent, so as to project outward in the radial direction of the hub in a cross-sectional view intersecting with the extending direction. 4.The vehicle hub according to Claim 3, is characterized in, that the secondary air chamber member includes a bulging portion, that bulges outward in the radial direction of the hub than the front end of the hub in the radial direction of the hub. 5.The vehicle hub as in any one of Claims 1-4, is characterized by. Each of the rail members includes a base: disposed along an outer circumferential surface of the depressed portion and a support portion; integral with the base portion, and the support portion extends, from an inner end portion in the hub width direction of the base portion and is inclined, in a radial direction of the hub toward an inner side in the hub width direction. 6.A method, for manufacturing a hub for a vehicle, comprising the following step according to Claim 1,) The method: for manufacturing a hub for a vehicle. The first Process, The secondary air chamber member is disposed at a predetermined position; on the outer circumferential surface of the depressed portion. The second The step, after the first process, fixes the pair of guide rail members to the outer peripheral surface, of the depressed portion, respectively.