CN215633197U

CN215633197U - Engine and vehicle

Info

Publication number: CN215633197U
Application number: CN202121714847.8U
Authority: CN
Inventors: 李栋; 陈广茂; 王刚; 许成
Original assignee: Weichai Power Co Ltd
Current assignee: Weichai Power Co Ltd
Priority date: 2021-07-27
Filing date: 2021-07-27
Publication date: 2022-01-25
Anticipated expiration: 2031-07-27

Abstract

The utility model relates to the technical field of power devices, and discloses an engine and a vehicle, wherein the engine comprises: the device comprises a machine body, a cam, a limiting part and at least one tappet; the body is provided with accommodating channels corresponding to at least one tappet one by one, and each tappet is positioned in the corresponding accommodating channel and can slide along the axial direction of the accommodating channel; the cam is arranged on the opening side of the accommodating channel, and each tappet is in transmission fit with the cam; the limiting component is fixed with the machine body and provided with limiting through holes in one-to-one correspondence with at least one tappet, each tappet penetrates through one limiting through hole, and the inner wall surface of each limiting through hole is matched with the side surface of each tappet so as to limit the rotation of each tappet around the axial axis of each tappet. Through increasing the spacing part fixed with the organism, and utilize the tappet to run through the spacing through-hole in spacing part, utilize the inner wall of spacing through-hole to carry on spacingly to the tappet, prevent its extension around the tappet, simplified technology, simultaneously, prevent the increase of oil leak risk.

Description

Engine and vehicle

Technical Field

The utility model relates to the technical field of power devices, in particular to an engine and a vehicle.

Background

In an engine, a tappet is assembled in a body, and the tappet serves as a follower of a cam, receives a lateral force applied when the cam rotates, and functions to transmit the thrust of the cam to a push rod or a valve stem. The tappet has various forms, which can be roughly divided into a mechanical tappet and a hydraulic tappet, and the mechanical tappet can be divided into a plane tappet and a roller tappet. The flat bottom tappet is in contact with the cam through a ground plane and is in sliding friction; the roller tappet is contacted with the cam through the cam and is in rolling friction.

The tappet has a tendency to rotate relative to the cam during operation, and therefore the tappet needs to be limited. For example, as shown in fig. 1, the tappet 05 is a roller tappet, and specifically includes a fixing rod, and a roller rotatably connected to the fixing rod; the push rod 04 is connected with the fixed rod and matched in the machine body 01, the cam surface of the cam 05 is in transmission fit with the circumferential surface of the roller to drive the push rod 04, and if the tappet rotates, the axis of the roller and the axis of the cam 05 are not parallel; set up the feather key 03 in dead lever 02 side and come to fix with organism 01, prevent that dead lever 02 from rotating, need process keyway, the technology is troublesome. Or, the bolt can be used to penetrate through the machine body 01 and be fixed with the fixing rod 02, but the scheme has the disadvantages of troublesome processing, high cost and oil leakage risk.

SUMMERY OF THE UTILITY MODEL

The utility model discloses an engine for preventing a tappet from rotating relative to a machine body.

In order to achieve the purpose, the utility model provides the following technical scheme:

in a first aspect, an engine is provided, comprising: the device comprises a machine body, a cam, a limiting part and at least one tappet;

the body is provided with accommodating channels corresponding to the at least one tappet one by one, and each tappet is positioned in the corresponding accommodating channel and can slide along the axial direction of the accommodating channel; the cams are arranged on the opening side of the accommodating channel, and each tappet is in transmission fit with the cam; the limiting component is fixed with the machine body and provided with limiting through holes in one-to-one correspondence with the at least one tappet, each tappet penetrates through one limiting through hole, and the inner wall surface of each limiting through hole is matched with the side surface of the corresponding tappet so as to limit the rotation of the corresponding tappet around the axial axis of the corresponding tappet.

In above-mentioned engine, through increasing the spacing part fixed with the organism, and utilize the tappet to run through the spacing through-hole in spacing part, the inner wall that utilizes spacing through-hole carries on spacingly facing the tappet, prevents its extension around the tappet, need not to set up the keyway on the tappet or set up the through-hole to the organism for the screw passes, has simplified technology, simultaneously, prevents the increase of oil leak risk.

Optionally, the tappet comprises a fixing rod and a roller, two holding arms are arranged at an interval at one end of the fixing rod close to the cam, the roller is rotatably connected between the two holding arms, the fixing rod is in sliding fit in the accommodating channel, and the circumferential surface of the roller is in transmission fit with the cam;

the limiting through hole comprises two inner wall surfaces which are parallel to each other, and the two fixing arms are correspondingly abutted against the two inner wall surfaces one to one so as to limit the roller to rotate around the axis of the fixing rod.

Optionally, the limiting part is provided with at least two limiting through holes;

the two parallel inner wall surfaces of each limiting through hole are perpendicular to the arrangement direction of the at least two limiting through holes.

Optionally, the limiting component includes a connecting portion and two limiting portions arranged at an interval, each limiting portion is provided with one limiting through hole, and the connecting portion is connected between the two limiting portions.

Optionally, the connecting portion and the two limiting portions are integrally formed.

Optionally, each of the limiting parts is located at the opening of the corresponding accommodating channel.

Optionally, the limiting part is detachably connected with the machine body.

Optionally, the limiting part is connected with the machine body through a fastener.

Optionally, each limiting portion is connected to at least one limiting plate, each limiting plate is perpendicular to the axial direction of the fixing rod, and each limiting plate is connected to the machine body through a fastener.

Optionally, the connecting part is plate-shaped and perpendicular to the axial direction of the fixing rod so as to be attached to the wall surface of the machine body;

the outer contour of each limiting part is cylindrical, so that each limiting part is matched in the corresponding accommodating channel and is matched with the inner circumferential surface of the corresponding accommodating channel through the outer circumferential surface.

In a second aspect, a vehicle is provided, which includes the engine provided in the foregoing technical solution as a power plant of the vehicle.

Compared with the prior art, the vehicle has the same advantages as the engine, and the detailed description is omitted.

Drawings

FIG. 1 is a partial cross-sectional view of a prior art engine;

FIG. 2 is a partial cross-sectional view of an engine provided by an embodiment of the present application;

FIG. 3 is a cross-sectional view taken at section M-M in FIG. 2;

FIG. 4 is a schematic view of the stopper member of FIG. 2;

fig. 5 shows a schematic view of the tappet of fig. 2.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

With reference to fig. 2 to 5, an engine provided in an embodiment of the present application includes: the device comprises a machine body 1, a cam 6, a limiting part 5 and at least one tappet 4; the body 1 may be a metal main structure; the machine body 1 is provided with accommodating channels 2 corresponding to at least one tappet 4 one by one, and each tappet 4 is positioned in the corresponding accommodating channel 2 and can slide along the axial direction of the accommodating channel 2; the cam 6 is arranged on the opening side of the accommodating channel 2, and each tappet 4 is in transmission fit with the cam 6; the limiting component 5 is fixed with the machine body 1, the limiting component 5 is provided with limiting through holes U corresponding to at least one tappet 4 one by one, each tappet 4 penetrates through one limiting through hole U, and the inner wall surface (S1, S2) of each limiting through hole U is matched with the side surface of the corresponding tappet 4 so as to limit the rotation of the corresponding tappet 4 around the axial axis of the corresponding tappet 4.

In the above-mentioned engine, along with the rotation of cam 6, tappet 4 is driven by the fitting surface of cam 6 and is reciprocating along holding passageway 2, push rod 3 (or valve stem) is fitted in holding passageway 2, also being driven reciprocating motion by tappet 4, through increasing spacing part 5 fixed with organism 1, and utilize tappet 4 to run through the spacing through-hole U in spacing part 5, utilize the internal face (S1, S2) of spacing through-hole U to carry out spacing to tappet 4, prevent its extension around tappet 4, need not to set up the keyway on tappet 4 or set up the through-hole to organism 1 for the screw passes, the technology has been simplified, simultaneously, prevent the increase of oil leak risk.

In a specific embodiment, the tappet 4 comprises a fixed rod 41 and a roller 42, one end of the fixed rod 41 close to the cam 6 is provided with two holding arms 411 at intervals, the roller 42 is rotatably connected between the two holding arms 411, the fixed rod 41 is in sliding fit in the accommodating channel 2, and the circumferential surface of the roller 42 is in driving fit with the cam 6; the limiting through hole U comprises two inner wall surfaces (S1, S2) which are parallel to each other, the two holding arms 411 are in one-to-one corresponding abutting joint with the two inner wall surfaces (S1, S2), and due to the fact that the inner wall surfaces (S1, S2) are both flat surfaces, after the two holding arms 411 are in abutting joint with the inner wall surfaces respectively, the trend of rotating around the axis of the fixing rod 41 is limited.

In a specific embodiment, the restricting member 5 has at least two restricting through holes U; two parallel inner wall surfaces (S1, S2) of each limiting through hole U are perpendicular to the arrangement direction of at least two limiting through holes U, taking the two limiting through holes U as an example, the two tappets 4 are respectively matched with the two limiting through holes U in a one-to-one correspondence mode, the limiting component 5 can be prevented from rotating around the axis parallel to the fixing rod 41 on the whole, and the structural stability of the limiting component 5 is ensured.

In a specific embodiment, the position limiting component 5 includes a connecting portion 52 and two position limiting portions 51 arranged at intervals, each position limiting portion 51 is provided with a position limiting through hole U, the opening directions of the two position limiting through holes U are the same, and the connecting portion 52 is connected between the two position limiting portions 51.

In a specific embodiment, the connecting portion 52 and the two limiting portions 51 are integrally formed, and the connecting portion 52 and the two limiting portions 51 may be formed by casting metal or alloy with higher strength, so as to prevent the two tappets 4 from breaking the limiting member 5 due to the torque of the limiting member 5, and improve the stability of connection with the machine body 1.

In a specific embodiment, each limiting portion 51 is located at the opening of the corresponding accommodating channel 2, and the tappet 4 is limited by the limiting portion 51 arranged inside the accommodating channel 2, so that the installation is more convenient.

In a specific embodiment, the limiting portion 51 is detachably connected to the engine body 1, so that the mold is simplified, the difficulty of the production process of the engine body 1 is also simplified, and the difficulty of assembling the whole engine is reduced compared with the case that the limiting portion and the engine body 1 are integrally formed.

In a specific embodiment, the limiting portion 51 is connected to the machine body 1 by a fastening member, which can simultaneously take into account the convenience of detachment and the stability of connection compared with the clamping manner.

In a specific embodiment, each limiting portion 51 is connected with at least one limiting plate 53, in fig. 4, for example, one limiting plate 53 is connected to each limiting portion 51, each limiting plate 53 is perpendicular to the axial direction of the fixing rod 41, each limiting plate 53 is connected with the machine body 1 through a fastening piece, specifically, a limiting hole H is formed in each limiting plate 53, and a bolt passes through the limiting hole H to be connected with a threaded hole in the machine body 1; because the surface of the machine body 1 facing the cam 6 is a plane, the accommodating through hole 2 is perpendicular to the plane (allowing errors in engineering meaning), and the limiting plate 53 and the fixing rod 41 can be better fitted and adapted to the surface of the machine body 1 facing the cam in the axial direction.

In a specific embodiment, the connecting portion 52 is plate-shaped and perpendicular to the axial direction of the fixing rod 41 to be attached to the wall surface of the body 1 facing the cam 6; the outer contour of each limiting portion 51 is cylindrical, and the cylindrical axis coincides with the axis of the fixing rod 41, so that each limiting portion 51 is fitted in the corresponding accommodating channel 2 and is fitted with the inner circumferential surface of the corresponding accommodating channel 2 through the outer circumferential surface, thereby ensuring the stability of the fitting of the limiting portions 51 and the corresponding accommodating channels 2, and further, the rotation of the tappet 4 is limited.

Based on the same inventive concept, the embodiment of the present application provides a vehicle including the engine provided in the foregoing embodiment as a power unit of the vehicle.

In the vehicle, along with the rotation of the cam 6, the tappet 4 is driven by the matching surface of the cam 6 to reciprocate along the accommodating channel 2, the push rod 3 (or a valve rod) is matched in the accommodating channel 2 and also driven by the tappet 4 to reciprocate, the limit part 5 fixed with the machine body 1 is added, the tappet 4 is utilized to penetrate through the limit through hole U in the limit part 5, the tappet 4 is limited by the inner wall surface (S1, S2) of the limit through hole U, the extension of the tappet 4 is prevented, a key groove does not need to be formed in the tappet 4 or a through hole does not need to be formed in the machine body 1 for a screw to pass through, the process is simplified, meanwhile, the increase of oil leakage risks is prevented, and the performance of the whole vehicle is improved.

It will be apparent to those skilled in the art that various changes and modifications may be made in the embodiments of the present invention without departing from the spirit and scope of the utility model. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.

Claims

1. An engine, comprising: the device comprises a machine body, a cam, a limiting part and at least one tappet;

the body is provided with accommodating channels corresponding to the at least one tappet one by one, and each tappet is positioned in the corresponding accommodating channel and can slide along the axial direction of the accommodating channel;

the cams are arranged on the opening side of the accommodating channel, and each tappet is in transmission fit with the cam;

the limiting component is fixed with the machine body and provided with limiting through holes in one-to-one correspondence with the at least one tappet, each tappet penetrates through one limiting through hole, and the inner wall surface of each limiting through hole is matched with the side surface of the corresponding tappet so as to limit the rotation of the corresponding tappet around the axial axis of the corresponding tappet.

2. The engine of claim 1, wherein the tappet includes a fixed rod and a roller, the fixed rod is provided with two holding arms at an interval at one end close to the cam, the roller is rotatably connected between the two holding arms, the fixed rod is slidably fitted in the accommodating channel, and the circumferential surface of the roller is in driving fit with the cam;

3. The engine of claim 2, wherein the stop member has at least two stop through holes;

4. The engine of claim 3, wherein the limiting component comprises a connecting part and two limiting parts arranged at intervals, each limiting part is provided with one limiting through hole, and the connecting part is connected between the two limiting parts.

5. The engine of claim 4, wherein the connecting portion and the two retainer portions are integrally formed.

6. The engine of claim 4, wherein each of the stops is located at an opening of a corresponding receiving channel.

7. The engine of claim 6, wherein the limiting portion is detachably connected with the engine body.

8. The engine of claim 7, wherein the limiting portion is connected to the engine block by a fastener.

9. The engine of claim 8, wherein at least one limiting plate is connected to each limiting portion, each limiting plate is perpendicular to the axial direction of the fixing rod, and each limiting plate is connected to the engine body through a fastening piece.

10. The engine according to claim 6, wherein the connecting portion has a plate shape and is perpendicular to an axial direction of the fixing rod to be attached to a wall surface of the engine body;

11. A vehicle characterized by comprising the engine of any one of claims 1 to 10.