一种斜盘式压缩机
Technical field The invention relates to a swash plate type compressor. Specifically, this invention relates to a coated with a coating on the swash plate of a pair of supporting and slant plate type compressor of the spacer block. Wherein each support block is located between the swash plate and a piston. Coating layer is in contact with the swash plate the area of the supporting block. Each support block has a substantially planar surface and a semi-spherical portion. Each substantially planar surface in contact with the swash plate, the swash plate and the rotary shaft to form the whole rotation. Each semi-spherical portion mounted in corresponding one of the two concave cavities of the piston. By supporting the rotation force of the swash plate is transmitted to the piston, to drive the piston. Background technology Japanese Patent Bulletin section 61-1636 and Japan discloses licensing communiques section 11-193780, discloses a swash plate type compressor, in the compressor, and the rotating shaft of the piston by the rotation of the rotary swash plate of the reciprocating motion. The front peripheral portion of the swash plate and each piston and between latter circumference part of the swash plate and each piston is provided with a supporting block between. The force of the swash plate support block will be transmitted to the piston, supporting cushion along swash-plate sliding. Therefore, the iron-based material for supporting wear cushion meeting. Therefore, the need to improve the supporting block of the swash plate in sliding performance. According to the Japanese Patent Bulletin section 61-1636 of the compressor illustrated, each hemispherical supporting cushion block of the the plane of the arch. The radius of the curvature of the arch part of the larger. In each of the arch-shaped surface is formed in the vicinity of the periphery of the 1st 2nd inclined plane and a inclined plane. The beveled faces of the 1st 2nd to the tangent plane of the outlet is less than an inclination angle of the tangent plane of the inclination angle of inclined 1st. 1st and 2nd oblique tangent plane pumps up the lubricant from the periphery of the swash plate to the swash plate and each of the space between the supporting block. This improves the supporting a swash plate sliding performance. According to the Japanese public licence communiques section 11-193780, , is formed on the swash plate with high sliding performance of the coating, the supporting the swash plate in order to further improve sliding property of the blocks. Coating layer to contact with the swash plate for supporting the front, the rear peripheral portion. According to the Japanese public licence communiques section 6-336978, , in the refrigerant gas passage is provided with a filter. The filter is used to filter foreign particles, such as part of the compressor and the external milling debris or wear particles of refrigerating circuit. However, the filter only can block of a size larger than a certain foreign particles in order to avoid the blockage of the filter. Therefore, foreign particles through the filter will enter between the swash plate and the supporting block. Therefore, the swash plate of the compressor with a coating, the coating can be between the swash plate and the supporting block of the size of the foreign particles is damaged to varying degrees. Once the coating is damaged, the sliding performance will drop. The content of the invention The invention solves the technical problem is to prevent foreign particles adversely affect or reduce the effectiveness of the coating. In order to achieve the above-mentioned solve the technical problem, the invention provides a swash plate type compressor, the compressor has at least one pair of in between the swash plate and the piston support cushion block. The motion of the swash plate is transmitted through the supporting block of the piston. The piston according to the transmitted motion for reciprocating movement. In a swash plate and the supporting contact coating for coating the two surfaces. Each coating surfaces are plane. Each support block includes a substantially planar surface and a semi-spherical portion. Each substantially planar surface in contact with the swash plate. Each semi-spherical portion is arranged within the piston. Each support block of the substantially planar surface includes a main chamfered portion. The main chamfered portion located substantially in the vicinity of the periphery of the planar surface. Each main chamfered portion the inclination angle of θ 1 with respect to the corresponding coating is a predetermined angle or than its to be small. Each coating and a substantially plane surface contact. Each of the chamfered portion and the maximum distance between the corresponding coating is equal to or less than β the thickness of the corresponding coating D. Combining with the example of the principle of the present invention with a graphic representation of reading the instructions below, other aspects of the invention and advantages will be more clear. Figure description Below with reference to the attached drawing and description of the preferred embodiment, geographic xie Ben invention can be better and its purpose and advantages. On the drawings: Figure 1 (a) embodiment according to a 1st a cross-sectional view of the compressor; Figure 1 (b) is a pair of support block and the swash plate the partial enlarged a cross-sectional view; Figure 2 is partial enlarged a cross-sectional view of a support block and the swash plate; Figure 3 shows the sectional diagram of the supporting block; Figure 4 is a local amplified embodiment of a cross-sectional view of 2nd; Figure 5 is a partial amplification a cross-sectional view of 3rd embodiment; Figure 6 is a local enlarged a cross-sectional view of 4th embodiment; Specific embodiments The reference below the Figure 1 to Figure 3 in accordance with this invention by a 1st embodiment. Figure 1 shows the swash plate type variable displacement compressor the internal structure. The rotating shaft 13 is made of a front casing 12 and cylinder block 11 supporting, the front shell 12 forming the control pressure chamber 121. Rotating shaft 13 by the external drive source such as a vehicle generator drive. Rotor 14 is fixed on the rotating shaft 13 is. A swash plate 15 is connected to the rotating shaft by way of pivot pins 13 and sliding in the axial direction. A supporting body 151 and the swash plate 15 and the whole moulded is made of iron-based material. A pair of guide pins 16 (fig. 1 only one is shown) is fixed on the supporting body 151 on. Each guide pin 16 is slidably mounted in a corresponding formed in the rotor 14 of the guide hole 141 in. The guide hole 141 and the guide pin 16 with the work. This allows the swash plate 15 can be relative to the rotation shaft 13 and the rotating shaft is inclined and 13 rotate integrally. The swash plate 15 by the tilting movement of the guide holes 141, the guide pin 16 and a rotating shaft 13 guide. The swash plate 15 through the dip angle of the control pressure chamber 121 to control the pressure change. When the control pressure chamber 121 rises the pressure of, the swash plate 15 to reduce the inclination angle. When the control pressure chamber 121 to reduce the pressure of, the swash plate 15 increases the inclination angle. Control pressure chamber 121 through a pressure release channel the refrigerant (not shown) to flow toward the rear shell 19 in the suction chamber 191. Discharge chamber 192 through the pressure of the refrigerant in the transfer passage (not shown) is delivered to the control pressure chamber 121. Pressure transfer passage is provided with a displacement control valve 25. Control valve 25 control from the discharge chamber 192 to the control pressure chamber 121 of the velocity of flow of the refrigerant. When the from the discharge chamber 192 to the control pressure chamber 121 increases [...] the refrigerant, the control pressure chamber 121 rises of pressure in the. When the from the discharge chamber 192 to the control pressure chamber 121 when the velocity of flow of the refrigerant is reduced, the control pressure chamber 121 is reduced pressure in the. Therefore, the control valve 25 controls the swash plate 15 of the inclination angle. When the swash plate 15 and 14 when contact is, the swash plate 15 of the maximum inclination angle. When the rotating shaft 13 of the snap ring 24 and the swash plate 15 at the time of contact, the swash plate 15 of the minimum inclination angle. The cylinder block 11 around the rotating shaft in the 13 is distributed with a piston chamber 111 (Figure 1 (a) only two shown). Piston chamber 111 is provided with a piston 17. In each piston 17 is formed with a keeper 171, the 171 is formed with a pair of concave cavity in 172,173. As shown in Figure 1 (b) illustrated, latter concave cavity 172 is connected to the semi-spherical supporting cushion block after 18A upper, front cavity 173 is connected to the front hemispherical support cushion block 18B the upper. Cabochons supporting cushion blocks 18A, 18B not from respective cavity 172,173 removed. Supporting cushion blocks 18A, 18B is made from iron-based material. The swash plate 15 through a supporting block the movement of the 18A, 18B into the piston 17 of the linear reciprocating motion. Therefore, each piston 17 in a respective piston chamber 111 reciprocates in. The back support cushion block 18A along the swash plate 15 of the contact surface 30 sliding. A front support cushion block 18B along the swash plate 15 of the contact surface 31 sliding. When a piston 17 from the associated piston chamber 111 of the mobile to the upper dead point to the lower dead point (Figure 1 (a) in the left side to the right side of) the, suction chamber 191 from the refrigerant in the 1st valve plate 20 in the corresponding suction inlet 201 flows to the associated piston chamber 111, and 2nd valve plate 21 on the corresponding suction valve 211 open. When a piston 17 from the associated piston chamber 111 mobile of a bottom dead center to the upper dead point (Figure 1 (a) in the right side to the left side of) the, relevant piston chamber 111 from the 1st valve plate the refrigerant 20 in the corresponding discharge port 202 is discharged to a discharge chamber 192, and 3rd valve plate 22 on the corresponding discharge valve 221 open. In 4th valve plate 23 is formed on the baffle 231 is used for limiting the discharge valve 221 of the opening. Discharge chamber 192 and the suction chamber 191 by the external refrigerant circuit 26 is connected. Discharge chamber 192 through an external refrigerant in the refrigerant loop 26 flow to the suction chamber 191, external refrigerant circuit 26 includes a condenser 27, an expansion valve 28 and an evaporator 29. As shown in Figure 1 (a), Figure 1 (b) illustrated, in a swash plate 15 latter outsideweek part of 152 and the front peripheral portion 153 are respectively formed with a coating 32, 33. The rear peripheral portion 152 and the front peripheral portion 153 as the contact area. Coating 32, 33 has two layers. This two layer includes respectively in the rear peripheral portion 152 and the front peripheral portion 153 formed on the metal layer 321,331, respectively and the metal layers 321, 331 forming the resin layer on 322,332. Therefore, resin layer 322,332 as respectively with the surface of the supporting cushion blocks 18A, 18B contact of the contact region. Metal layer 321,331 are formed on the peripheral portion 152,153 on. Metal layer 321, 331 is made of aluminum-base material, the aluminum-based material containing silicon is mainly composed of the aluminum form. Metal layer 321, 331 can also be composed of copper-based material. Each layer of the resin layer 322,332 are formed on the corresponding metal layer 321,331 the upper. Each layer of the resin layer 322,332 such as polyamide imide resin, polyamide-imide is distributed in the molybdenum disulfide, a solid lubricant such as graphite. Therefore, the swash plate 15 is made of a material different of, coating 32, 33 is made of a material soft more. Metal layer 321,331 has a thickness of from about 60 to 70 microns. Resin layer 322,332 has a thickness of from about 10 to 20 microns. Therefore, coating 32, 33 is about D of the total thickness of the 70 to 90 microns. As shown in Figure 2, support block 18A, 18B having a substantially planar surface 34 and a semi-spherical portion 35. Substantially planar surface 34 and the swash plate 15 contacts. Semi-spherical portion 35 is arranged on the relevant piston 17 of the corresponding cavity 172,173 in. A substantially flat surface 34 includes an arched surface 341 and main slanting tangent plane 342. The arched surface 341 is very large radius of curvature. Annular main driven 342 is formed on the substantially planar surface 34 and the periphery of the main clip plane 342 and the arched surface 341 smooth binding. First chamfered portion 36 effectively comprising 342 forming, and the chamfered portion 36 and main slanting tangent plane 342 smooth binding. Each master clip plane 342 to the corresponding coating 32, 33 from the corresponding distance of a substantially flat surface 34 to the center of the direction along the radial direction is gradually increased. Each substantially flat surface 34 is an arched surface, the vertex of the arched surface of the corresponding P is located on a substantially flat surface 34 of the central. Figure 3 is graph of dissection surface a support of the spacer block. In the Figure 3 in, in order to facilitate graphic representation, substantially planar surface 34 and a sub-chamfered portion 36 along the perpendicular to the surface of the section 34 is amplified in the direction of. The representative point P surface 34 of the central. The representative line H with the surface 34 of the plane of the central point of contact P. Effectively supporting cushion host 342 with respect to the corresponding plane of inclination angle θ 1 1st H is about an average value of 2 to 7°. Support block time chamfered portion 36 with respect to the corresponding plane of inclination angle θ 2 2nd H is about an average of 40°. Inclination angle θ 1, the fixation and 2 are respectively the main clip plane 342 and a sub-chamfered portion 36 of the line segment relative to the corresponding radial extension of the inclination of the plane H. Plane H to the arched surface 341 α the maximum distance is about 2 to 7 microns. Plane H to the main driven 342 β the maximum distance is about 10 microns. The H plane of the chamfered portion 36 γ greater than the maximum distance the coating 32, 33 D the thickness. When the swash plate 15 is rotated, the swash plate 15 of the contact surface 30, 31 of the lubricant is sucked into the first chamfered portion 36 and the contact surface 30, 31 of the space between the, then is to suck the main clip plane 342 and the contact surface 30, 31 of the space between and 341 and the contact surface 30, 31 of the space between. 1st embodiment has the following advantages: (1) main driven 342 with respect to the corresponding plane of inclination angle θ 1 1st H is about an average value of 2 to 7°. Each plane with the corresponding surface of the H 34 the center point of the contact P. When the foreign particles to enter the minimum inclination angle θ 1 a main driven 342 and the swash plate 15 is between the, corresponding coating 32, 33 will be damaged. However, each of the main clip plane 342 and the corresponding contact surface 30, 31 between the β the maximum distance is about 10 microns. Therefore, greater than the diameter of the coating 32, 33 D the thickness (approximately 70 to 90 microns) of external particles cannot enter the main clip plane 342 and the corresponding contact surface 30, 31 of the space between. Furthermore, greater than the diameter of the coating 32, 33 of the thickness of the foreign particles can enter D slanting portion 36 and the corresponding contact surface 30, 31 of the space between. However, each slanting part 36 with respect to the corresponding plane of the inclination angle θ 2 H is about an average of 40 °, therefore, external particles cannot enter slanting portion 36 and the corresponding contact surface 30, 31 of the space between. If the diameter is smaller than the coating 32, 33 of the thickness of the foreign particles D enters the main driven 342 the space between the and the swash plate, the coating is totally submerged foreign particles 32, 33 in. Therefore, when the foreign particles each supporting cushion and into the space between the swash plate, the foreign particles will not roll. Therefore, the diameter is greater than thickness D can easily damage the coating 32, 33 can not the foreign particles enter the swash plate 15 and the support block 18A, 18B space between the. This prevents the coating foreign particles 32, 33 of the damage. In the test, the aluminum particles and the iron particles is put into the control pressure chamber 121 in. Then let the compressor running for one hour, the resin particle check 322,333 the degree of injury. The total weight of the foreign particles to 12 mg per litre. Aluminum particles and the iron particles to the ratio of the weight of the the 2 [...] 1. The maximum diameter of the foreign particles is 100 microns. As a result, resin layer 322,333 no wear. (2) supporting cushion blocks 18A, 18B of the swash plate 15 of the contact surface 30, 31 is provided with a lubricant. Has a larger inclination angle of θ 2 2nd slanting part of the 36 effectively the lubricant is sucked into the 34 and the corresponding contact surface 30, 31 of the space between. (3) in the 1st embodiment, part slanting 36 2nd inclination angle θ 2 of the mean value is about 40°. However, if every 2nd inclination angle θ 2 are more than 20 °, D diameter is greater than the thickness of the coating layer can be foreign particles enter into the contact surface of 30, 31 and corresponding part slanting 36 space between the. However, external particles cannot enter into the contact surface 30, 31 and corresponding part slanting 36 space between the. That is to say, when the diameter is greater than the thickness of the coating is D foreign particles enter into the contact surface of 30, 31 and corresponding part slanting 36 when the space between the, coating 32, 33 the possibility of damage is very small. slanting part 36 2nd inclination angle θ 2 of greater than 20°. When the slanting part 36 2nd inclination angle θ 2 of greater than 20° and the main driven 342 is equal to or less than the 1st inclination angle of 20 °, the, , main driven 342 and the corresponding contact surface 30, 31 the maximum distance between the coating must be less than β 32, 33 D the thickness. This prevents the coating foreign particles 32, 33 of the damage. (4) sliding each other compared with the same material, different materials having relatively low sliding each other the possibility of. A swash plate 15 is made of an iron-based material, coating 32, 33 of the metal layer 321, 331 is made of aluminum-base material. Aluminum-based material is suitable for preventing the swash plate 15 and the support block 18A, 18B of the bite. (5) the swash plate 15 of the contact surface 30, 31 and each of the supporting cushion blocks 18A, 18B the corresponding surface 34 extend between the center of the lubricant coating 32, 33 of the service life is very important. The suction of the lubricant the contact surface of the swash plate 30, 31 and each of the supporting cushion blocks 18A, 18B the corresponding surface 34 in the space between the centre, each arched surface 341 plays a very important role. (6) part slanting 36 dispel with the swash plate 15 contact supporting cushion blocks 18A, 18B that the sharp edge. The reference map is 4 to explain a 2nd embodiment. A 1st embodiment to the same or similar parts with the same or similar specified label. An arched surface 341 and main slanting tangent plane 342C connected smoothly. Tangent plane main slanting 342C and slanting part 36C connected smoothly. Supporting cushion blocks 18C main driven 342C 1st H with respect to the corresponding plane of inclination angle θ 1 is about the average value of 10°. Supporting cushion blocks 18C of the inclined part of the chamfered portion time 36C with respect to the corresponding plane of inclination angle θ 2 H 2nd 1st the average value of a in the embodiment of the same. Each main driven 342C to the corresponding plane of the maximum distance H β is about 70 to 80 microns. Coating 32, 33 the thickness of the 1st embodiment of the same. 2nd 1st a first embodiment of the embodiment with the advantages of same. Figure 5 a 3rd embodiment is shown. A 1st embodiment to the same or similar parts with the same or similar specified label. An arched surface 341 and a support cushion block 18D main driven 342D connected smoothly. Tangent plane main slanting 342D and slanting part 36C connected smoothly. Supporting cushion blocks 18D main driven 342D 1st H with respect to the corresponding plane of inclination angle θ 1 is about the average value of 10°. First chamfered portion 36D 2nd H with respect to the corresponding plane of inclination angle θ 2 is about an average of 60°. Each main driven 342D to the corresponding plane of the maximum distance H β is about 70 to 80 microns. Coating 32, 33 the thickness of the 1st embodiment of the same. 3rd with a plurality of 1st embodiment of the same advantages of the embodiment. Figure 6 is shown a 4th embodiment of the. A 1st embodiment to the same or similar parts with the same or similar specified label. An arched surface 341 and a support cushion block 18E main driven 342E connected smoothly. Tangent plane main slanting 342E and slanting part 36E connected smoothly. Tangent plane main slanting 342E outside arches of the chamfered portion 342E1 and in arches the chamfered portion 342E2 form. Chamfered portion 342E1 and 342E2 connected smoothly. Supporting cushion blocks 18E main driven 342E 1st H with respect to the corresponding plane of inclination angle θ 1 is about the average value of 10°. First chamfered portion 36E 2nd H with respect to the corresponding plane of inclination angle θ 2 is about an average of 40°. Each main driven 342E to the corresponding plane of the maximum distance H β is about 70 to 80 microns. Coating 32, 33 the thickness of the 1st embodiment of the same. 4th with a plurality of 1st embodiment of the same advantages of the embodiment. The invention also includes the following some embodiments. (1) this invention can be used in only the swash plate coated with a resin layer containing solid lubricant of the compressor. (2) the invention can be used for the swash plate coated with a metal layer of the compressor only. (3) in the 2nd, 3rd, 4th embodiment, the chamfered portion can be removed, the main chamfered portion is directly connected with the semi-spherical part. For those professionals of this field, without departing from the purport of this invention and the scope of the of, the invention can also be many other specific form to embody. Is should be noted, in particular, the invention can be the above-mentioned form to embody. Therefore, should be considered as an example and the example of the embodiment are illustrative and non-restrictive, and the invention is not limited to the details given premises, in the fringe of the scope of the claims and its equivalents can be within the range of to its be modified. A swash plate type compressor that has a pair of shoes (18A, 18B, 18C, 18D, 18E) between a swash plate (15) and a piston (17). The motion of the swash plate is transmitted to the piston through the shoes. Each piston reciprocates according to the transmitted motion. A coating (32, 33) is applied to each surface of the swash plate to contact the corresponding shoe. The surface (H) of each coating (32, 33) is flat. Each shoe (18A to 18E) includes a substantially flat surface (34), which contacts the swash plate (15), and a semi-spherical portion (35), which is fitted to the piston (17). Each substantially flat surface (34) includes a main chamfered portion (342) near the periphery. The inclination angle (θ 1) of each main chamfered portion (342) with respect to the corresponding coating is a predetermined angle or less. Each coating contacts one of the substantially flat surfaces (34). The maximum distance ( beta ) between each main chamfered portion (342) and the corresponding coating is equal to or less than the thickness (D) of the corresponding coating (32, 33). <IMAGE> 1. A swash plate type compressor, wherein a swash plate (15) and a piston (17) is arranged between a pair of support block (18A, 18B, 18C, 18D, 18E), the movement of the swash plate by the through the supporting block is transmitted to the piston, the piston according to the transmitted motion for reciprocating movement, characterized in that the swash plate with the support to contact two surfaces of the coated coating (32, 33), each of the coating (32, 33) of the surface (H) are plane, each of the support block (18A, 18B, 18C, 18D, 18E) comprises a substantially planar surface (34) and a semi-spherical portion (35), each of said a substantially flat surface (34) and the swash plate (15) contact, each of said semi-spherical portion (35) are arranged in the piston (17) the inner, each of the support block of the a substantially flat surface (34) includes a main chamfered portion (342), the main chamfered portion (342) is located in the a substantially flat surface (34) near the periphery of the, each main chamfered portion (342) has the inclination angle with respect to the corresponding coating (θ 1), each of the coating with the a substantially flat surface (34) is in contact with one of, each of the main chamfered portion (342) and the maximum distance between the corresponding coating (β) is equal to or less than its corresponding the coating (32, 33) of the thickness (D). 2. Compressor according to Claim 1, characterized in that each of the support around the corresponding spacer block includes a main chamfered portion (342) the sub-chamfered portion (36), the sub-chamfered portion (36) and the main chamfered portion (342) is connected, the sub-chamfered portion (36) with respect to the corresponding coating (θ 2) the obliquity of the larger than the main chamfered portion (342) the inclination angle (θ 1). 3. Compressor as in Claim 1 or Claim 2, characterized in that each of the coating (32, 33) is formed by metal layer (321,331) and resin layer (322,332) is formed, said resin layer (322,332) comprising a solid lubricant, the resin layer (322,332) in the metal layer (321,331) formed on. 4. Compressor according to Claim 3, characterized in that the swash plate (15) is made from iron-based material, the metal layer (321,331) is made from aluminum-based or copper-based material. 5. Compressor as in Claim 1 or Claim 2, characterized in that each main chamfered portion (342) and the distance between the corresponding coating thereof from the corresponding said a substantially flat surface (34) to the center of the radial direction is gradually increased toward the outer direction. 6. Compressor as in Claim 1 or Claim 2, characterized in that each of the a substantially flat surface (34) is an arched surface, the vertex in the a substantially flat surface (34) of the central. 7. Compressor according to Claim 3, characterized in that the metal layer (321, 331) than the swash plate material is to be made from soft material.