Mounting structure for high-pressure oil pump and engine

Technical Field

The embodiment of the invention relates to the technical field of engines, in particular to a high-pressure oil pump mounting structure and engine.

Background Art

At present, diesel engine high pressure oil pump often through chain or timing belt drive, reference view 1 and Figure 2, the high-pressure pump 1 'through the three hexagonal flange bolts fixed to the cylinder block 2' on, and the other end through the fixed nut 3 'and the chain wheel 4' are fixed together, the chain wheel 4 'and the high-pressure pump 1' through the conical surface between the interference fit. The high-pressure pump 1 'and then the timing chain 5' and engine crankshaft 6 'and the camshaft 7' are connected together. The crankshaft of the drive chain, drives the high-pressure oil pump to rotate, thereby realizing the fuel system of engine oil supply. Finally, by the timing cover plate sealed timing chain drive system, the realization of the oil seal.

In the assembly process of the engine, the completion of the high-pressure pump 1 'and the cylinder body 2' connection, and then assembling the chain wheel 4 ', re-assembling timing chain 5', finally install the timing cover, the problem does not exist. When the engine is the high-pressure oil pump of the quality problem needs to be replaced when the high-pressure pump, then there will be remove troublesome, in particular to the engine already assembled on the overall.

The general first need to lift out the engine from the vehicle, and then sequentially remove the timing cover, the timing chain, chain wheel, remove the high-pressure pump and the cylinder body by the fixing bolt, to the end of the high-voltage pump from the cylinder block and taken out, the entire disassembly process is complex, large amount of work, and it is very time-consuming, can also cause the labor cost is also very large.

Content of the invention

The purpose of this invention is to provide a high-pressure oil pump mounting structure, in order to facilitate disassembly and maintenance of the high-pressure of the oil pump, and improving the maintenance efficiency, and the cost is reduced. The purpose of this invention is to provide a mounting structure with the high-pressure oil pump of the engine.

In order to achieve the above object, the present invention provides the following technical proposal:

A high-pressure oil pump mounting structure, which comprises an engine main body and the timing chain, the timing chain wheel is fixed on the engine body, the engine body is provided with a mounting hole, the timing chain wheel is arranged on the inner wall is the spline structure of the sprocket hole, one end of the high-pressure hydraulic oil pump drive shaft is fixed with a spline sleeve, the spline of the sleeve is fixed on the one end of the high-pressure hydraulic oil pump drive shaft passes through said mounting hole and the through hole with the sprocket spline connected; and the high-pressure oil pump with the engine main body is detachably and fixedly connected.

The high pressure oil pump mounting structure, the high-pressure hydraulic oil pump drive shaft and the spline sleeve conical surface interference fit, and fixed through the locking nut.

The high pressure oil pump mounting structure, also comprises a liner, the liner and the timing chain wheel connected with the bearing, and is fixedly connected with the engine main body; the liner is also provided with fixed with said spline sleeve for high-pressure hydraulic oil pump drive shaft passes through one end of the through hole of the board.

The high pressure oil pump mounting structure, the mounting hole and the through hole and the aperture of the plate is greater than the outer diameter of the spline of the sleeve.

The high pressure oil pump mounting structure, the lining board and said engine main body is connected with the bolt.

The high pressure oil pump mounting structure, the high-pressure oil pump with the engine main body is connected with the bolt.

A kind of engine, is arranged on the high-pressure pump, said high-pressure oil pump through a insofar as provided by the invention high-pressure oil pump mounting structure fixed on the engine.

The beneficial effect of the present invention is characterized in that:

The embodiment of the invention provides high-pressure oil pump mounting structure, the high-pressure oil pump with the engine main body is detachably and fixedly connected, the high-pressure hydraulic oil pump drive shaft and the timing chain spline-connected, in the high-pressure pump needs to be repaired, the lifting of the high-pressure oil pump and the connection of the body of the engine, can be convenient to take out the high-pressure oil pump, does not need to remove the timing cover plate and other related timing mechanism, also without hanging and set out, thereby greatly improving the convenience of maintenance when the high-pressure pump, and improves the maintenance efficiency.

The present invention provides engine, because of the high-pressure oil pump mounting structure, can obtain the same above mentioned beneficial effect, here does not repeat.

Description of drawings

In order to more clearly explain the embodiment or the technical proposal in the prior art, in the embodiment of the lower portion of the to the need to use the diagram for a brief account of, and the Figure of the present invention and put the concrete implementation of the further detailed description of the, wherein:

Figure 1 is the schematic view of the prior art the installation state of the high-pressure pump;

Figure 2 is the front view of the prior art mechanism at all times;

Figure 3 is the exploded view of the embodiment of the invention provides high-pressure oil pump mounting structure.

Wherein the above in the Figure the grade as follows:

1 '- high-pressure oil pump, 2' - cylinder, 3 '- fixing nut, 4' - sprocket, 5 '- timing chain, 6' - engine crankshaft, 7' - the camshaft;

1 - the engine main body, 2 - the timing chain, 3 - spline sleeve, 4 - high-pressure oil pump, 5 - locking nut, 6 - lining plate;

11 - mounting hole; 21 - sprocket hole; 41 - high-pressure hydraulic oil pump drive shaft; 61 - lining plate through hole.

Mode of execution

In order to make the technical personnel in the field to better xie Ben technological scheme of this invention, the lower portion of the specific embodiment of the combination of this programme for further details.

As shown in Figure 3, the embodiment of the invention provides a high pressure oil pump mounting structure, which comprises an engine main body 1 and the timing sprocket 2, the timing sprocket 2 is fixed on the engine body 1 on, the engine body 1 is provided with a mounting hole 11, the timing sprocket 2 is arranged on the inner wall of the through hole is spline structure of the sprocket 21, the high-pressure hydraulic oil pump drive shaft 41 is fixed at one end of the splined sleeve 3, is fixed on the splined sleeve 3 of the high-pressure hydraulic oil pump drive shaft 41 passes through one end of the mounting hole 11 and the through hole with the sprocket 21 spline-connected; and the high-pressure pump 4 and the engine main body 1 detachable fixed connection.

In the high-pressure oil pump when a fault occurs, the high-pressure pump 4 from the engine main body 1 disengage, the knocking of the high-pressure pump 4, and can be removed and with the timing sprocket 2 spline connection, thus can be conveniently taken out of the high-pressure pump for maintenance, the timing system does not need to be removed, without hanging and set out, thereby greatly improving the convenience of maintenance.

In particular, the high-pressure pump 4 preferably by a bolt and the engine main body 1 is fixedly connected, fixed and firm, convenient disassembly.

In addition, the high-pressure hydraulic oil pump drive shaft 41 and the spline sleeve 3 conical surface interference fit, and through the locking nut 5 locking and fixing, in order to guarantee the high-pressure hydraulic oil pump drive shaft 41 and the spline sleeve 3 the reliability of the connection, thereby ensuring that the high-pressure pump 4 and the reliability of the work.

In the embodiment of the invention provided in the mounting structure of the high-pressure oil pump, preferably, also comprises a liner 6, the liner 6 and the timing sprocket 2 is connected with the bearing, and with the engine main body 1 is fixedly connected; the said lining plate 6 is also provided with fixed with said spline sleeve for 3 of the high-pressure hydraulic oil pump drive shaft 41 passes through one end of the lining plate through hole 61. The liner 6 of the convenient setting states the timing sprocket 2 fixed, and facilitate a timing sprocket 2 working performance.

Preferably, the mounting hole 11 and the liner through hole 61 and the aperture of the sleeve is greater than the spline 3 of the outer diameter, in order to conveniently when maintenance of the high-pressure oil pump out.

Preferably, the liner 6 and the engine body 1 is connected with the bolt. The liner 6 is a ring-shaped structure, the circumferential arrangement of a plurality of the engine body 1 is connected with the bolt.

The embodiment of the invention provides an engine, is arranged on the high-pressure pump, said high-pressure oil pump through the embodiment of the invention provides high-pressure oil pump mounting structure fixed on the engine, the high-pressure oil pump of the engine convenient assembly and disassembly, and convenient maintenance.

According to the schema shown in the above embodiment a detailed description of the structure of this invention, the characteristics and the effect, is nothing less than the for the preferred embodiment of this invention, but the invention is not to limit the scope of the shown in the Figure, all in accordance with the concept of the present invention the changes made, or modified to change the equivalent embodiment of the same, still does not exceed the specification and covered by the spirit of the representation of the, should be in the scope of protection of the present invention.