CN217681982U

CN217681982U - Engine and crankshaft pulley mounting structure thereof

Info

Publication number: CN217681982U
Application number: CN202221938048.3U
Authority: CN
Inventors: 于学琦; 张文通; 马海川; 马丽; 李小月
Original assignee: Weichai Power Co Ltd
Current assignee: Weichai Power Co Ltd
Priority date: 2022-07-25
Filing date: 2022-07-25
Publication date: 2022-10-28
Anticipated expiration: 2032-07-25

Abstract

The utility model discloses an engine and crank pulley mounting structure thereof, this mounting structure include bent axle and crank pulley, crank pulley passes through first bolt fastening and is in the axle head of bent axle still includes circumference locating part, including first spacing hole on the crank pulley, the front end housing of engine includes the spacing hole of second, and is following in the projection plane that the axial of bent axle formed, first spacing hole with the spacing hole of second sets up with one heart to the configuration is: when the crankshaft pulley is disassembled and assembled, the circumferential limiting part can be inserted into the first limiting hole and the second limiting hole so as to construct rotation limiting between the crankshaft pulley and the front end cover. By applying the scheme, the disassembly and assembly difficulty can be effectively reduced, and a good technical guarantee is provided for reasonable service control working hours.

Description

Engine and crankshaft pulley mounting structure thereof

Technical Field

The utility model relates to the technical field of engines, concretely relates to engine and crank pulley mounting structure thereof.

Background

The crankshaft pulley is used as a power source component for driving other engine accessories, and drives a generator, a pump, an air compressor and the like to operate through a transmission belt.

Among the prior art, crankshaft pulley passes through the bolt fastening on the bent axle, when the crankshaft pulley that needs to be changed, because the bolt moment of torsion of fixed belt pulley is too big, the bent axle will rotate along with the spanner when dismantling this bolt. For this purpose, it is usually necessary to remove the gearbox and fix the flywheel from the flywheel end, and then remove the pulley from the front end, i.e. to disconnect all the connections around the gearbox. In addition, for the whole vehicle with compact arrangement, the belt pulley can be replaced even by disassembling the whole power assembly, the operation difficulty of service personnel is higher, the service working hours are longer, and unnecessary working hours are wasted.

In view of this, it is desirable to optimize the mounting structure of the crank pulley to improve the operability of assembling and disassembling the crank pulley.

SUMMERY OF THE UTILITY MODEL

An object of this application is to provide an engine and crankshaft pulley mounting structure thereof, can effectively reduce the dismouting degree of difficulty through configuration optimization, provides good technical guarantee for reasonable control service man-hour.

The utility model provides an engine crankshaft pulley's mounting structure, including bent axle and crankshaft pulley, crankshaft pulley passes through first bolt fastening and is in the axle head of bent axle still includes circumference locating part, including first spacing hole on the crankshaft pulley, the front end housing of engine includes the spacing hole of second, and is following in the projection plane that the axial of bent axle formed, first spacing hole with the concentric setting in the spacing hole of second to the configuration is: when the crankshaft pulley is disassembled and assembled, the circumferential limiting part can be inserted into the first limiting hole and the second limiting hole so as to construct rotation limiting between the crankshaft pulley and the front end cover.

Optionally, the circumferential position-limiting member and the first position-limiting hole and the second position-limiting hole which are matched with the circumferential position-limiting member are arranged into a plurality of groups.

Optionally, the plurality of sets of circumferential position limiting members, the first position limiting holes and the second position limiting holes are circumferentially and uniformly distributed.

Optionally, the circumferential limiting part is a second bolt, the first limiting hole is a through hole, and the second limiting hole is an internal threaded hole matched with the second bolt.

Optionally, the circumferential limiting part is a limiting pin, the first limiting hole is a through hole, and the second limiting hole is a blind hole adapted to the limiting pin.

The utility model also provides an engine, the engine adopts as before the mounting structure of engine crankshaft pulley.

Compared with the prior art, the technical scheme has the following advantages: the embodiment of the application can construct the rotation limit between the crankshaft pulley and the front end cover based on the circumferential limit part and the limit holes in the crankshaft pulley and the front end cover. So set up, when needs dismouting crank pulley, can arrange first spacing hole and the spacing hole of second in with circumference locating part, restriction crank pulley is for the rotation of engine front end housing, on this basis, utilizes the first bolt of spanner instrument rotating, can accomplish corresponding dismouting operation. The structure is simple and reliable, the operation is easy, the operation intensity of operation and maintenance personnel can be effectively reduced, and the service working hours can be reasonably controlled.

Drawings

FIG. 1 is a partial sectional view of a mounting structure of a crank pulley of an engine according to an embodiment;

FIG. 2 is a view taken along line A of FIG. 1;

fig. 3 is a schematic view of the front end cap shown in fig. 1.

In the figure:

the crankshaft pulley 1, the first limiting hole 11, the bolt 2, the bolt 3, the front end cover 4, the second limiting hole 41 and the crankshaft 5.

Detailed Description

In order to make the technical solutions of the present invention better understood by those skilled in the art, the present invention will be further described in detail with reference to the accompanying drawings and specific embodiments.

In the related art, the crankshaft pulley is fixed on the crankshaft through a bolt, and is limited by the functional structure form of the crankshaft pulley, the bolt for fixing the pulley has overlarge torque, and the problems of high operation difficulty and long service man-hour exist when the crankshaft pulley is replaced. Based on this, the embodiment of the present application provides a mounting structure of an engine crankshaft pulley, please refer to fig. 1, which is a partial sectional view of the mounting structure of the engine crankshaft pulley according to the present embodiment.

The mounting structure of the engine crank pulley shown in fig. 1 includes a crank pulley 1 and a crankshaft 5. The crankshaft pulley 1 is fixed at the shaft end of the crankshaft 5 by the first bolt 3, and here, the assembling and fixing manner of the crankshaft pulley 1 relative to the crankshaft 5 can be the same as the existing connecting structure.

The present embodiment further includes a second bolt 2, and accordingly, the pulley 1 includes a first limiting hole 11, and the front end cover 4 of the engine includes a second limiting hole 41, see fig. 2 and fig. 3 together, where fig. 2 is a view from a direction of fig. 1, and fig. 3 is a schematic view of the front end cover shown in fig. 1.

The first stopper hole 11 and the second stopper hole 41 are concentrically arranged in a projection plane along the axial direction of the crankshaft 5. And is configured to: when the crankshaft pulley 1 is dismounted, the second bolt 2 can pass through the first limiting hole 41 on the crankshaft pulley 1 and is screwed and matched with the internal thread of the second limiting hole 41 on the front end cover 4, so that the rotation limitation between the crankshaft pulley 1 and the front end cover 4 is established. Like this, can realize when dismouting first bolt 3, crankshaft pulley 1 can not rotate along with the spanner, can easily dismantle.

Referring to fig. 2 and 3, in the present embodiment, the second bolts 2 and the first limiting holes 11 and the second limiting holes 41 adapted thereto are provided in four sets. It should be understood that in other specific implementations, other plural sets can be configured according to the structural size of the actual product, as long as the functional requirement that the crankshaft pulley 1 cannot rotate along with the wrench when the first bolt 3 is disassembled and assembled is satisfied.

In order to make the stress of each second bolt 2 be in a uniform load state, as shown in the figure, four second bolts 2 and the first limiting holes 11 and the second limiting holes 41 matched with the four second bolts 2 are uniformly distributed along the circumferential direction.

In addition, the second bolt 2 can also be used in other structural forms as a circumferential limiting member for limiting the follow-up of the pulley 1. For example, but not limited to, the circumferential position-limiting member may be a position-limiting pin (not shown), and accordingly, the first position-limiting hole is a through hole, and the second position-limiting hole is a blind hole adapted to the position-limiting pin. When the first bolt 3 is dismounted, the limit pin can be inserted into the through hole on the crank pulley 1 and the blind hole on the front end cover 4, and the rotation limit between the through hole and the blind hole can be constructed.

In other specific implementations, the circumferential limiting member may also be in the form of a limiting block. It should be noted that it is within the scope of the present application as long as the rotational limit of the crank pulley 1 with respect to the front cover 4 can be established.

In addition to the foregoing mounting structure of the engine crank pulley, the present embodiment also provides an engine that employs the mounting structure of the engine crank pulley described with reference to fig. 1 to 3. It should be understood that other functional configurations or structures of the engine are not the core invention of the present application and can be implemented by those skilled in the art based on the prior art, and therefore, the detailed description thereof is omitted.

The ordinal numbers "first" and "second" used herein are used only to describe a structure or acts of like function in the claims. It is to be understood that the use of the ordinal numbers "first" and "second" does not constitute an understandable limitation on the claimed technical solution.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that it is obvious to those skilled in the art that various modifications and improvements can be made without departing from the principle of the present invention, and these modifications and improvements should also be considered as the protection scope of the present invention.

Claims

1. The utility model provides an engine crankshaft pulley's mounting structure, includes bent axle and crankshaft pulley, crankshaft pulley passes through first bolt fastening the axle head of bent axle, its characterized in that still includes circumference locating part, including first spacing hole on the crankshaft pulley, the front end housing of engine includes the spacing hole of second, and is following in the projection plane that the axial of bent axle formed, first spacing hole with the concentric setting in the spacing hole of second to the configuration is: when the crankshaft pulley is disassembled and assembled, the circumferential limiting part can be arranged in the first limiting hole and the second limiting hole so as to construct rotation limiting between the crankshaft pulley and the front end cover.

2. The engine crankshaft pulley mounting structure according to claim 1, wherein the circumferential position-limiting member and the first position-limiting hole and the second position-limiting hole that are fitted to each other are provided in plural sets.

3. The engine crankshaft pulley mounting structure according to claim 2, wherein a plurality of sets of the circumferential position-limiting members and the first position-limiting hole and the second position-limiting hole that are fitted to each other are circumferentially and uniformly distributed.

4. The engine crankshaft pulley mounting structure according to any one of claims 1 to 3, wherein the circumferential position-limiting member is a second bolt, the first position-limiting hole is a through hole, and the second position-limiting hole is an internal thread hole adapted to the second bolt.

5. The engine crankshaft pulley mounting structure according to any one of claims 1 to 3, wherein the circumferential position-limiting member is a position-limiting pin, the first position-limiting hole is a through hole, and the second position-limiting hole is a blind hole adapted to the position-limiting pin.

6. An engine characterized by employing the mounting structure of an engine crank pulley according to any one of claims 1 to 5.