CN214697981U

CN214697981U - Eccentric wear prevention roller type hydraulic tappet valve rocker arm combination device

Info

Publication number: CN214697981U
Application number: CN202120570356.4U
Authority: CN
Inventors: 黄永全; 韦良锦
Original assignee: Guangxi Yuchai Machinery Co Ltd
Current assignee: Guangxi Yuchai Machinery Co Ltd
Priority date: 2021-03-19
Filing date: 2021-03-19
Publication date: 2021-11-12
Anticipated expiration: 2031-03-19

Abstract

The utility model discloses an eccentric wear prevention roller type hydraulic tappet valve rocker arm combination device, which comprises a rocker arm shaft, a valve rocker arm, a hydraulic tappet, a roller and a valve bridge; the valve rocker is sleeved on the rocker shaft and can swing by taking the rocker shaft as a shaft; the hydraulic tappet is arranged at the end part of the valve rocker and can move along with the valve rocker; the roller is arranged at the lower end part of the hydraulic tappet and can move along with the hydraulic tappet; the valve bridge is arranged below the hydraulic tappet, the top of the valve bridge is provided with a contact plane, and the roller abuts against the contact plane so that the valve bridge moves along with the hydraulic tappet. The utility model discloses a roller type hydraulic tappet valve rocker composite set who prevents eccentric wear can through the stress point change problem that improves valve rocker and valve bridge, finally solves valve eccentric wear and upset problem.

Description

Eccentric wear prevention roller type hydraulic tappet valve rocker arm combination device

Technical Field

The utility model relates to a valve rocker composite set field especially relates to an anti-eccentric roller type hydraulic tappet valve rocker composite set.

Background

As shown in FIG. 3, in the valve rocker arm assembly of the prior art, a pressure head with a universal joint is in contact with a valve bridge, and the contact surface of the valve bridge is a plane. The valve rocker moves up and down, the valve bridge moves up and down along with the valve rocker pressure head, and the valve bridge drives the valve to move up and down, so that the valve is opened and closed.

The prior art valve rocker arm assemblies suffer from the following drawbacks: the valve rocker arm moves up and down, namely non-vertical up and down, by taking the rocker arm as a tangent of a radius R by taking the rocker arm as a center, so that the contact point of a rocker arm pressure head and a valve bridge is not fixed. As shown in fig. 3, when the included angles of the rocker arms are respectively a1 and a2, the distance between the pressure head and the valve bridge is a1-a2, the pressure head forms a front-back friction force along the direction a1 to the valve bridge, and the friction drag force further acts on the valve rod, so that the valve is not completely vertically stressed up and down, and is also dragged back and forth by the valve bridge, and finally, the valve is seriously worn forward and backward by the valve and the valve seat ring because the valve cannot completely vertically move up and down.

The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information constitutes prior art already known to a person skilled in the art.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a roller type hydraulic tappet valve rocker composite set who prevents eccentric wear, it can be through improving the stress point change problem of valve rocker and valve bridge, finally solves valve eccentric wear and upset problem.

In order to achieve the purpose, the utility model provides an eccentric wear prevention roller type hydraulic tappet valve rocker arm combination device, which comprises a rocker shaft, a valve rocker arm, a hydraulic tappet, a roller and a valve bridge; the valve rocker is sleeved on the rocker shaft and can swing by taking the rocker shaft as a shaft; the hydraulic tappet is arranged at the end part of the valve rocker and can move along with the valve rocker; the roller is arranged at the lower end part of the hydraulic tappet and can move along with the hydraulic tappet; the valve bridge is arranged below the hydraulic tappet, the top of the valve bridge is provided with a contact plane, and the roller abuts against the contact plane so that the valve bridge moves along with the hydraulic tappet.

In a preferred embodiment, the hydraulic tappet is mounted in a tappet housing which is arranged at the end of the valve rocker, the tappet housing and the hydraulic tappet being movable together with the valve rocker.

In a preferred embodiment, the anti-eccentric roller type hydraulic tappet valve rocker arm combination device further comprises valves which are arranged at two ends of the lower part of the valve bridge, and the valves can move along with the valve bridge.

In a preferred embodiment, the roller is capable of rolling about its central axis.

In a preferred embodiment, the center axis of the roller is arranged perpendicular to the center axis of the hydraulic tappet.

In a preferred embodiment, the center axis of the roller is perpendicular to a line connecting the center axes of the valves, viewed in a direction perpendicular to the contact plane.

Compared with the prior art, the utility model discloses a roller type hydraulic tappet valve rocker composite set who prevents eccentric wear has following beneficial effect: the cylindrical roller capable of rolling is arranged below the valve rocker, two ends of the roller are arranged on the hydraulic tappet, the roller can rotate relative to the rocker, and the roller is in direct contact with the valve bridge. The rocker arm pressure head that the rocking arm end was used has the gyro wheel of hydraulic tappet to replace, and the gyro wheel directly bridges with the valve bridge and contacts, replaces sliding friction with rolling friction, reduces the valve bridge to the horizontal pulling force of valve, reduces valve upset power.

Drawings

Fig. 1 is an exploded perspective view of a roller hydraulic tappet valve rocker arm assembly according to an embodiment of the present invention;

fig. 2 is a schematic perspective view of a roller hydraulic tappet valve rocker arm assembly according to an embodiment of the present invention;

FIG. 3 is a force analysis diagram of a valve rocker arm assembly according to one embodiment of the prior art.

Description of the main reference numerals:

1-rocker shaft, 2-valve rocker, 3-hydraulic tappet, 31-tappet shell, 4-roller, 5-valve bridge, 51-contact plane and 6-valve.

Detailed Description

The following detailed description of the present invention is provided in conjunction with the accompanying drawings, but it should be understood that the scope of the present invention is not limited by the following detailed description.

Throughout the specification and claims, unless explicitly stated otherwise, the word "comprise", or variations such as "comprises" or "comprising", will be understood to imply the inclusion of a stated element or component but not the exclusion of any other element or component.

As shown in fig. 1 to 2, the roller type hydraulic tappet valve rocker arm combination device according to the preferred embodiment of the present invention mainly includes a rocker shaft 1, a valve rocker arm 2, a hydraulic tappet 3, a roller 4, a valve bridge 5, a valve 6, and other components.

Referring to fig. 1 and 2, in some embodiments, the valve rocker arm 2 is sleeved on the rocker shaft 1, and the valve rocker arm 2 can swing around the rocker shaft 1. The hydraulic tappet 3 is arranged at the end part of the valve rocker 2, and the hydraulic tappet 3 can move along with the valve rocker 2. The roller 4 is arranged at the lower end of the hydraulic tappet 3, and the roller 4 can move along with the hydraulic tappet 3. The valve bridge 5 is arranged below the hydraulic tappet 3, the top of the valve bridge 5 is provided with a contact plane 51, and the roller 4 is abutted against the contact plane 51, so that the valve bridge 5 moves along with the hydraulic tappet 3.

In some embodiments, hydraulic tappet 3 is mounted in a tappet housing 31, tappet housing 31 is arranged at the end of rocker arm 2, and tappet housing 31 and hydraulic tappet 3 are movable together with rocker arm 2. The air valves 6 are arranged at two ends of the lower part of the air valve bridge 5, and the air valves 6 can move along with the air valve bridge 5.

In some embodiments, the roller 4 can roll about the central axis of the roller 4. The roller 4 of the present embodiment is a cylindrical roller. And the central axis of the roller 4 is perpendicular to the central axis of the hydraulic tappet 3. The central axis of the roller 4 is perpendicular to the line connecting the central axes of the valves 6, viewed in a direction perpendicular to the contact plane 51.

To sum up, the utility model discloses a roller type hydraulic tappet valve rocker composite set who prevents eccentric wear has following advantage: the cylindrical roller capable of rolling is arranged below the valve rocker, two ends of the roller are arranged on the hydraulic tappet, the roller can rotate relative to the rocker, and the roller is in direct contact with the valve bridge. The rocker arm pressure head that the rocking arm end was used has the gyro wheel of hydraulic tappet to replace, and the gyro wheel directly bridges with the valve bridge and contacts, replaces sliding friction with rolling friction, reduces the valve bridge to the horizontal pulling force of valve, reduces valve upset power. Although the contact point of gyro wheel and valve bridge still can change along with the motion of rocking arm, because the gyro wheel is rollable, greatly reduced rocking arm and the valve bridge between drag and get rid of frictional force from beginning to end, the remaining vertical interact power from top to bottom that all is, because drag and get rid of frictional force from beginning to end has reduced, drags to get rid of the motion trend also to the valve pole from beginning to end and reduces, and the valve pole just can be close to complete vertical motion from top to bottom for valve wearing and tearing are more even.

The foregoing descriptions of specific exemplary embodiments of the present invention have been presented for purposes of illustration and description. It is not intended to limit the invention to the precise form disclosed, and obviously many modifications and variations are possible in light of the above teaching. The exemplary embodiments were chosen and described in order to explain certain principles of the invention and its practical application to enable one skilled in the art to make and use various exemplary embodiments of the invention and various alternatives and modifications as are suited to the particular use contemplated. It is intended that the scope of the invention be defined by the claims and their equivalents.

Claims

1. The utility model provides an anti-eccentric roller type hydraulic tappet valve rocker composite set which characterized in that includes:

a rocker shaft;

the valve rocker is sleeved on the rocker shaft and can swing by taking the rocker shaft as a shaft;

the hydraulic tappet is arranged at the end part of the valve rocker arm and can move along with the valve rocker arm;

the roller is arranged at the lower end part of the hydraulic tappet and can move along with the hydraulic tappet; and

the valve bridge is arranged below the hydraulic tappet, a contact plane is arranged at the top of the valve bridge, and the roller abuts against the contact plane so that the valve bridge moves along with the hydraulic tappet.

2. The anti-eccentric roller type hydraulic tappet valve rocker assembly of claim 1, wherein the hydraulic tappet is mounted in a tappet housing, the tappet housing being disposed at an end of the valve rocker, the tappet housing and the hydraulic tappet being movable together with the valve rocker.

3. The anti-eccentric roller hydraulic tappet valve rocker assembly of claim 1, further comprising valves disposed at both ends of a lower portion of the valve bridge, the valves being movable with the valve bridge.

4. The anti-eccentric roller hydraulic tappet valve rocker assembly of claim 3, wherein the roller is capable of rolling about its central axis.

5. The anti-eccentric roller hydraulic tappet valve rocker assembly of claim 3, wherein the central axis of the roller is perpendicular to the central axis of the hydraulic tappet.

6. The anti-eccentric roller hydraulic tappet valve rocker assembly of claim 3, wherein the central axis of the roller is perpendicular to a line connecting the central axes of the valves, as viewed in a direction perpendicular to the contact plane.