Rocker arm assembly with variable valve lift for engine

Abstract

The utility model relates to the technical field of rocker arms, in particular to a rocker arm assembly with variable valve lift for an engine, which comprises a rocker arm body and a rocker arm roller, two ends of the rocker arm body are integrally connected with extension arms, and one end of each extension arm is provided with an embedded groove for movably mounting the rocker arm roller. Two reinforcing counter bores are formed in the embedded groove, and the rocker arm body is provided with an anti-abrasion mechanism through the two reinforcing counter bores, wherein the anti-abrasion mechanism is used for movably supporting the rocker arm idler wheel. The extension arm with the integrated structure is arranged on the rocker arm body, so that the rocker arm roller in the rocker arm body can be disassembled, assembled and replaced conveniently; a reinforcing counter bore is formed in the bearing support, a bearing shaft elastically supported by a first strong spring is arranged in the reinforcing counter bore so that the bearing support can be connected with the extension truss, and a supporting shaft elastically supported by a second strong spring is arranged on the extension truss, so that bidirectional buffering support is provided for the bearing support, and abrasion consumption of a rocker arm body in the rotating process of a rocker arm roller is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of rocker arms, in particular to a rocker arm assembly with variable valve lift for an engine. Background Art

[0002] At present, there are various engine valve control technologies for automobiles to improve the combustion in the cylinder under different working conditions, so that the engine has good response in both high-speed and low-speed areas, and improve the fuel economy and power of the engine. Engine valve control technologies include variable valve lift technology and engine braking technology. The engine braking technology uses the compression resistance, internal friction and intake and exhaust resistance generated by the compression stroke of the engine to form a braking effect on the drive wheel. The variable valve lift motion mechanism can generally change the lift of the valve through variable cams, variable rocker arm ratios, etc.

[0003] Existing rocker arm assemblies, such as a variable valve lift rocker arm assembly disclosed in announcement number CN216429711U, have a rocker arm roller at the rear portion through a roller pin, and piston assembly two is disposed in piston chamber two, and piston assembly one is disposed in piston chamber one. However, the rocker arm roller rotates at a high frequency under the driving action of the valve cam, so that there is repeated contact friction between the rocker arm body and the rocker arm roller, which can easily cause structural wear of the rocker arm body and the rocker arm roller, and even cause structural deformation of the rocker arm body, affecting the overall installation firmness and safety of use of the rocker arm assembly. Utility Model Content

[0004] The utility model aims to solve the problem in the prior art that the wear of the rocker arm roller in the rocker arm assembly easily leads to the deformation and damage of the rocker arm body structure, and proposes a rocker arm assembly with variable valve lift for an engine.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A rocker arm assembly with variable valve lift for an engine comprises a rocker arm body and a rocker arm roller, wherein both ends of the rocker arm body are integrally connected with extension arms, an embedding groove for movably mounting the rocker arm roller is provided in one end of the extension arm, two reinforced countersunk holes are provided in the embedding groove, and the rocker arm body is provided with an anti-wear mechanism for movably supporting the rocker arm roller through the two reinforced countersunk holes.

[0007] Preferably, the embedding groove is a U-shaped structure opening outward, and the two reinforcing countersunk holes are symmetrically arranged at the upper and lower ends of the embedding groove.

[0008] Preferably, the anti-wear mechanism comprises a load-bearing shaft sleeved in the reinforced countersunk hole, and a bearing support and an extension truss are fixedly connected to the load-bearing shaft, a first strong spring is welded between the bearing support and the reinforced countersunk hole, and a supporting shaft that movably extends into the embedded groove is slidably sleeved in both ends of the extension truss, a guide groove is opened in the rocker arm body, and a second strong spring welded thereto and a guide block for movably pulling the supporting shaft are arranged in the guide groove;

[0009] The anti-wear mechanism also includes a limiting end fixedly connected to the supporting shaft, and a limiting socket for fixing the limiting end is opened in the bearing support, and a damping bearing for rotatably installing the rocker roller is fixedly installed in the bearing support.

[0010] Preferably, the bearing support is connected to one end of the load-bearing shaft located in the embedding groove, and the extended truss is fixedly connected to the other end of the load-bearing shaft located outside the embedding groove by screws, and the first strong spring is sleeved on the load-bearing shaft.

[0011] Preferably, the second strong spring is welded in the guide groove, and the guide block is slidably mounted in the guide groove.

[0012] Preferably, a traction link is pin-connected between the guide block and the supporting shaft, and the limiting end is an L-shaped structure.

[0013] Compared with the prior art, the utility model has the following advantages:

[0014] 1. The utility model provides an extension arm of an integral structure on the rocker arm body, and a mounting groove for mounting the rocker arm roller is provided in the extension arm. An anti-wear mechanism for movably mounting the rocker arm roller is provided in the mounting groove, so that the rocker arm roller can be disassembled, assembled and replaced in the rocker arm body.

[0015] 2. The utility model opens a reinforced countersunk hole in the embedded groove, and arranges a load-bearing shaft elastically supported by a first strong spring in the reinforced countersunk hole to facilitate the connection between the bearing support and the extension truss, and arranges a supporting shaft elastically supported by a second strong spring on the extension truss, thereby providing a two-way buffer support for the bearing support to reduce the wear and tear of the rocker arm body during the rotation of the rocker arm roller. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic structural diagram of a rocker arm assembly with variable valve lift for an engine proposed by the utility model;

[0017] Figure 2 A bottom view of a rocker arm assembly with variable valve lift for an engine proposed by the utility model;

[0018] Figure 3A cross-sectional view of a rocker arm assembly with variable valve lift for an engine proposed by the utility model;

[0019] Figure 4 This is an enlarged schematic diagram of the structure of part A of a rocker arm assembly with variable valve lift for an engine proposed by the utility model.

[0020] In the figure: 1. rocker arm body; 2. extension arm; 3. embedded groove; 4. reinforced countersunk hole; 5. load-bearing shaft; 6. bearing support; 7. extension truss; 8. first strong spring; 9. supporting shaft; 10. guide groove; 11. second strong spring; 12. guide block; 13. traction connecting rod; 14. limit end; 15. limit socket; 16. damping bearing; 17. rocker arm roller. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0022] Reference Figure 1-Figure 4 A rocker arm assembly with variable valve lift for an engine includes a rocker arm body 1 and a rocker arm roller 17. Extension arms 2 are integrally connected to both ends of the rocker arm body 1. An embedding groove 3 for movably mounting the rocker arm roller 17 is provided at one end of the extension arm 2. It should be noted that the rocker arm assembly also includes a valve cam that is rotatably opposed to the rocker arm roller 17. Under the driving action of the valve cam, the rocker arm roller 17 is caused to rotate in the rocker arm body 1. Two reinforced countersunk holes 4 are provided in the embedding groove 3. Metal washers are provided in the reinforced countersunk holes 4 to improve the wear resistance of the reinforced countersunk holes 4.

[0023] The rocker arm body 1 is provided with an anti-wear mechanism for movably supporting the rocker arm roller 17 through two reinforced countersunk holes 4. Figure 3 With attached Figure 4 :

[0024] On the one hand, the anti-wear mechanism includes a load-bearing shaft 5 sleeved in the reinforced countersunk hole 4, and the load-bearing shaft 5 is fixedly connected with a bearing support 6 and an extension truss 7, and a first strong spring 8 is welded between the bearing support 6 and the reinforced countersunk hole 4. Under the elastic support of the first strong spring 8, the load-bearing shaft 5 is vertically extended and retracted, and a supporting shaft 9 that is movably extended to the embedded groove 3 is slidably sleeved in both ends of the extension truss 7, and a guide groove 10 is opened in the rocker arm body 1, and a second strong spring 11 welded therein and a guide block 12 for movably pulling the supporting shaft 9 are arranged in the guide groove 10, and the guide block 12 slides in the guide groove 10 under the elastic support of the second strong spring 11, and the supporting shaft 9 is pulled and supported by the traction connecting rod 13;

[0025] On the other hand, the anti-wear mechanism also includes a limit end 14 fixedly connected to the supporting shaft 9, and a limit socket 15 for fixing the limit end 14 is opened in the bearing support 6, and a damping bearing 16 for rotatably installing a rocker roller 17 is fixedly installed in the bearing support 6, and the supporting shaft 9 is used to provide a limiting effect on the bearing support 6.

[0026] The mounting groove 3 is a U-shaped structure opening outward, and two reinforcing countersunk holes 4 are symmetrically arranged at the upper and lower ends of the mounting groove 3 so as to provide support for the rocker roller 17 from the upper and lower ends.

[0027] The bearing support 6 is connected to one end of the load-bearing shaft 5 located in the embedded groove 3, and the extended truss 7 is fixedly connected to the other end of the load-bearing shaft 5 located outside the embedded groove 3 by screws, and the first strong spring 8 is mounted on the load-bearing shaft 5 to realize the disassembly and assembly of the load-bearing shaft 5 and the bearing support 6.

[0028] The second strong spring 11 is welded in the guide groove 10 , and the guide block 12 is slidably mounted in the guide groove 10 to provide elastic support for the guide block 12 .

[0029] Please refer to the instruction manual for details Figure 4 A traction link 13 is pin-connected between the guide block 12 and the supporting shaft 9, and the limiting end 14 is an L-shaped structure.

[0030] The functional principle of the utility model can be explained through the following operation modes:

[0031] The rocker roller 17 is driven to rotate on the rocker body 1 by the valve cam, and the rocker roller 17 applies pressure to the bearing support 6 through the damping bearing 16, so that the bearing support 6 is forced to vibrate in the reinforced countersunk hole 4, and the bearing support 6 drives the extension truss 7 to move through the load-bearing shaft 5, and the bearing support 6 moves in the opposite direction under the support of the first strong spring 8;

[0032] The bearing support 6 pulls the supporting shaft 9 to slide in the rocker body 1 and the extension truss 7 through the limiting end 14, and squeezes the guide block 12 through the pulling connecting rod 13. The guide block 12 moving along the guide groove 10 squeezes the second strong spring 11, and the second strong spring 11 is used to provide reverse support for the supporting shaft 9.

[0033] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A variable valve lift rocker arm assembly for an engine, comprising a rocker arm body (1) and a rocker arm roller (17), characterized in that: The two ends of the rocker arm body (1) are integrally connected to an extension arm (2); one end of the extension arm (2) is provided with an embedding groove (3) for movably mounting a rocker arm roller (17); two reinforced countersunk holes (4) are provided in the embedding groove (3); and the rocker arm body (1) is provided with an anti-wear mechanism for movably supporting the rocker arm roller (17) via the two reinforced countersunk holes (4).

2. The rocker arm assembly with variable valve lift for an engine according to claim 1, characterized in that: The embedding groove (3) is a U-shaped structure with an opening facing outward, and the two reinforcing countersunk holes (4) are symmetrically arranged at the upper and lower ends of the embedding groove (3) with respect to the midline.

3. The rocker arm assembly with variable valve lift for an engine according to claim 1, characterized in that: The anti-wear mechanism comprises a load-bearing shaft (5) sleeved in the reinforced countersunk hole (4), and a bearing support (6) and an extension truss (7) are fixedly connected to the load-bearing shaft (5), a first strong spring (8) is welded between the bearing support (6) and the reinforced countersunk hole (4), and a supporting shaft (9) movably extending into the embedded groove (3) is slidably sleeved in both ends of the extension truss (7), a guide groove (10) is provided in the rocker arm body (1), and a second strong spring (11) welded thereto and a guide block (12) for movably pulling the supporting shaft (9) are arranged in the guide groove (10); The anti-wear mechanism also includes a limit end (14) fixedly connected to the supporting shaft (9), and a limit socket (15) for fixing the limit end (14) is provided in the bearing support (6), and a damping bearing (16) for rotatably installing the rocker roller (17) is fixedly provided in the bearing support (6).

4. The rocker arm assembly with variable valve lift for an engine according to claim 3, characterized in that: The bearing support (6) is connected to one end of the load-bearing shaft (5) located in the embedding groove (3), and the extension truss (7) is fixedly connected to the other end of the load-bearing shaft (5) located outside the embedding groove (3) by screws, and the first strong spring (8) is sleeved on the load-bearing shaft (5).

5. The rocker arm assembly with variable valve lift for an engine according to claim 3, characterized in that: The second strong spring (11) is welded in the guide groove (10), and the guide block (12) is slidably mounted in the guide groove (10).

6. The rocker arm assembly with variable valve lift for an engine according to claim 3, characterized in that: A traction link (13) is pin-connected between the guide block (12) and the supporting shaft (9), and the limiting end (14) is an L-shaped structure.

Images