Execution pin structure for preventing jumping failure of valve bridge, valve bridge and engine

Abstract

The utility model discloses an execution pin structure for preventing jumping failure of a valve bridge, the valve bridge and an engine, and relates to the technical field of engines, the execution pin structure comprises an execution pin and a limiting piece, the execution pin is installed on the valve bridge and located below a brake rocker arm, and a limiting hole is formed in the side face of the execution pin; the limiting piece is arranged in the limiting hole and extends outwards, when the valve bridge jumps upwards, the execution pin makes contact with the brake rocker arm, the limiting piece makes contact with the valve bridge to play a limiting role, and the valve bridge is prevented from disengaging and losing efficacy.

Description

Technical Field

[0001] The utility model relates to the technical field of engines, and in particular to an actuator pin structure for preventing a valve bridge from failing due to bounce, a valve bridge and an engine. Background Art

[0002] Conventional engines do not have a collapse structure in the valve bridge. When the valve bridge bounces due to inertia and other factors during engine braking, the exhaust rocker arm can simultaneously limit the valve bridge to prevent the valve bridge from bouncing and falling out. However, during high-power engine braking, a collapse mechanism is designed inside the valve bridge. After the brake is turned on, the collapse mechanism is unlocked, which has the effect of offsetting the movement of the exhaust rocker arm, making the exhaust rocker arm's limiting effect on the valve bridge disappear, which can easily cause the valve bridge to bounce, resulting in the valve bridge falling out and failure. Utility Model Content

[0003] In view of the deficiencies in the above-mentioned prior art, the utility model provides an actuator pin structure, a valve bridge and an engine for preventing the valve bridge from failing due to bounce. The structure can limit the position when the valve bridge bounces to prevent the valve bridge from flying out and ensuring the normal operation of the valve bridge.

[0004] In order to achieve the above objectives, the present invention adopts one or more of the following technical solutions:

[0005] In a first aspect, an actuator pin structure is provided to prevent a valve bridge from bouncing and failing, including an actuator pin and a limit member, wherein the actuator pin is mounted on the valve bridge and is located below a brake rocker arm, a limit hole is provided on a side of the actuator pin, and the limit member is disposed in the limit hole and extends outward, and when the valve bridge bounces upward, the actuator pin contacts the brake rocker arm and the limit member contacts the valve bridge for limiting.

[0006] Preferably, the limiting hole penetrates along the radial direction of the actuating pin, and the limiting members extend from both sides of the actuating pin to limit the valve bridge.

[0007] Preferably, the limiting member is a long strip structure, and the limiting member is made of steel to ensure strength.

[0008] Preferably, the limiting member is a limiting pin.

[0009] Preferably, the limiting member is fixedly connected to the limiting hole.

[0010] In a second aspect, a high-power brake valve bridge is provided, comprising an actuator pin structure as described above for preventing valve bridge bounce failure, and also comprising a valve bridge body, a braking rocker arm and an exhaust rocker arm, wherein the braking rocker arm is located above the actuator pin and presses the actuator pin when pressed down; a crush mechanism is arranged inside the valve bridge body, and one end of the exhaust rocker arm is located above the crush mechanism for driving the crush mechanism to operate.

[0011] Preferably, the extending direction of the limiting member is perpendicular to the extending direction of the valve bridge body.

[0012] Preferably, one end of the exhaust rocker arm is located above the crush mechanism and is coaxially arranged with the crush mechanism.

[0013] Preferably, a mounting hole is opened on one side of the valve bridge body, and the actuator pin is arranged in the mounting hole.

[0014] Preferably, the surface where the limiting hole is located is processed into a plane, and the inner surface of the mounting hole and the surface where the limiting hole is located are matched in shape to form a non-rotating structure to limit the rotation of the actuator pin.

[0015] Preferably, the execution pin includes a base and a connecting body above the base, and the limiting member is arranged on the connecting body.

[0016] In a third aspect, an engine is provided, comprising a high-power brake valve bridge as described above.

[0017] By adopting the above technical solution, the beneficial effects of the utility model are as follows:

[0018] 1. The actuator pin structure of the utility model contacts the brake rocker arm above through the actuator pin, and contacts the jumping valve bridge body through the limiter. When the valve bridge body drives the actuator pin to fly out, the valve bridge body is limited by the joint action to prevent the valve bridge from falling out and failing.

[0019] 2. The high-power brake valve bridge of the utility model prevents the actuator pin from rotating during operation through the cooperation between the valve bridge body and the actuator pin during installation, which can effectively ensure the limiting effect of the limiting member and improve the stability of the engine during operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention.

[0021] Figure 1 This is a schematic diagram of the structure of the first embodiment of the utility model;

[0022] Figure 2 This is a schematic diagram of the structure of the second embodiment of the present utility model;

[0023] Figure 3 This is a schematic diagram of the braking process of the second embodiment of the utility model;

[0024] Figure 4 It is a top view of the second embodiment of the present utility model.

[0025] In the figure: 1. actuator pin; 2. limit hole; 3. limit piece; 4. valve bridge body; 5. collapse mechanism; 6. mounting hole; 7. brake rocker arm; 8. exhaust rocker arm. DETAILED DESCRIPTION

[0026] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0027] It should be noted that the following detailed descriptions are exemplary and are intended to provide further description of the present invention. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.

[0028] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the utility model. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0029] Based on the embodiments of the present utility model, all other embodiments obtained by ordinary technicians in the field without making any creative work shall fall within the scope of protection of the present utility model.

[0030] Embodiment 1

[0031] In a typical embodiment of the present application, an actuator pin structure is provided to prevent valve bridge failure due to bounce, such as Figure 1 As shown, it includes an actuator pin 1 and a limit member 3. The actuator pin is assembled on one side of the valve bridge and is located below the brake rocker arm. A limit hole 2 is provided on the side of the actuator pin. The limit member 3 is arranged in the limit hole 2 and extends outward by a certain length. When the valve bridge bounces upward, the limit member and the actuator pin work together. The actuator pin 1 contacts the brake rocker arm above to prevent the bounce. At the same time, the extended limit member 3 blocks the valve bridge next to it from bouncing upward from above, thereby preventing the valve bridge from bouncing out and causing engine failure.

[0032] In order to better play the limiting role, the limiting member is set to extend parallel to the ground, and when jumping, it works together with the execution pin to contact the upper brake rocker arm to stop jumping. Figure 1 As shown, the limiting hole 2 penetrates along the radial direction of the actuator pin 1, and the limiting members 3 extend from both sides of the actuator pin 1 to limit the two sides of the valve bridge and prevent the valve bridge from jumping upward.

[0033] The stopper 3 should be a long strip structure made of steel to ensure strength and avoid damage when colliding with the brake rocker arm. An optional method is to use a stopper pin on the market as a stopper without special production. Of course, there is no specific restriction on the cross-sectional shape of the stopper, which can be circular, square or other polygons. It only needs to be fixed in the stopper hole and extend outward to prevent the valve bridge from jumping and flying out.

[0034] In order to ensure stability and firm use, the limiting member 3 is fixedly connected to the limiting hole 2, and the limiting member can be fixed in the limiting hole by welding, bonding, bolt connection, fixing pins, etc.

[0035] Embodiment 2

[0036] This embodiment provides a high-power brake valve bridge, including the actuator pin structure for preventing the valve bridge from bouncing in the first embodiment, such as Figure 2 As shown, the valve bridge body 4, the brake rocker arm 7 and the exhaust rocker arm 8 are also included. The brake rocker arm 7 is located above the actuator pin, and the lower end of the brake rocker arm 7 is in contact with the actuator pin 1. When the brake rocker arm 7 is pressed down, the actuator pin 1 is pressed downward to open the valve. A collapse mechanism 5 is arranged inside the valve bridge body 4, and one end of the exhaust rocker arm 8 is located above the collapse mechanism 5 to drive the collapse mechanism to operate.

[0037] Specifically, the exhaust rocker arm 8 is located above the crush mechanism, and one end is coaxially arranged with the crush mechanism 5. After the crush mechanism is unlocked, when the exhaust rocker arm rotates, it presses down the crush mechanism 5 and enters the braking state.

[0038] A mounting hole 6 is provided on one side of the valve bridge body, and the actuator pin 1 is arranged in the mounting hole and cooperates with the clearance of the mounting hole, and can move axially relative to the valve bridge body. When the actuator pin 1 is installed, the limiter 3 extends outwards a certain distance above the mounting hole, which can play a limiting role when the valve bridge body jumps upward. In order to obtain a better limiting effect, the limiter 3 extends to both sides in the vertical direction of the valve bridge body 4, so that when the brake lift reaches the maximum, that is, when the brake rocker arm is pressed down to the maximum extent, the limiter pin can be closer to the valve bridge body, so that the valve bridge can be limited in time when it jumps up, and the force is more balanced.

[0039] At the same time, in order to prevent the execution pin from rotating during operation and causing the position of the limit member to deviate, the execution pin in this embodiment is designed to be a long waist type. The so-called long waist type means that on the basis of the execution pin being a cylinder, at least the outer surface of the execution pin where the limit hole is located is processed into a plane. Of course, there may also be other planes. At the same time, the inner surface of the mounting hole is also processed with a corresponding plane to cooperate with the shape of the plane where the limit hole is located to form a non-rotating structure, thereby limiting the rotation of the execution pin in the mounting hole, thereby ensuring that the limit member always remains in the direction of extending toward the brake rocker arm to avoid limit failure.

[0040] like Figure 2 As shown, the execution pin 1 is designed to include a cylindrical base and a connector above the base, a limiter is arranged on the connector, and the connector is designed to be the above-mentioned long waist-shaped structure, which plays a role in limiting the rotation of the execution pin.

[0041] The working principle of this embodiment:

[0042] For high-power brake valve bridge, after the brake is turned on, Figure 2 As shown, the exhaust rocker arm 8 drives the internal collapse mechanism 5 to be adjusted to the unlocked state; the brake rocker arm 7 presses down the actuator pin 1, and the cylinder brake works, and the valve bridge body 4 tilts at this time. After a braking cycle is completed, the brake rocker arm 7 is reset, and the valve bridge body 4 jumps upward under the action of inertia and other factors. Since the actuator pin 1 is provided with a limiting member 3, the valve bridge body 4 will drive the actuator pin 1 to fly upward at this time. The actuator pin flying upward contacts the brake rocker arm 7, preventing the actuator pin 1 from continuing to jump. At the same time, the extended limiting member 3 contacts the valve bridge body 4, thereby limiting the entire valve bridge body 4 from flying out, avoiding engine failure due to valve bridge detachment.

[0043] At the same time, the distance between the installation height of the stopper 3 and the upper surface of the valve bridge body 4 can control the amplitude of the valve bridge's beating, reducing the noise and abnormal wear caused by the valve bridge's beating. It is easy to understand that when the actuator pin 1 is assembled in the mounting hole 6, at this time, the height of the stopper 3 from the upper surface of the valve bridge body is at least not less than the valve lift of the valve bridge, so as to ensure that the actuator pin smoothly opens the valve downward when the valve bridge is braked. Preferably, after assembly, the difference between the distance between the stopper and the upper surface of the valve bridge body and the valve lift is in the range of 0.3-1mm, which can effectively prevent the valve bridge body from falling out and beating too much without affecting the braking function, thereby improving the stability of the engine during braking.

[0044] Embodiment 3

[0045] This embodiment provides an engine, including a high-power brake valve bridge as described in the second embodiment, which can prevent the valve bridge from falling out during engine braking and causing engine failure, thereby ensuring the normal operation of the engine.

[0046] The above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. For those skilled in the art, the utility model may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. An actuator pin structure to prevent valve bridge failure due to vibration. It is characterized in that It includes an actuator pin and a limit piece. The actuator pin is installed on the valve bridge and is located below the brake rocker arm. A limit hole is provided on the side of the actuator pin. The limit piece is arranged in the limit hole and extends outward. When the valve bridge jumps upward, the actuator pin contacts the brake rocker arm and the limit piece contacts the valve bridge for limiting.

2. An actuator pin structure for preventing valve bridge from bouncing failure as claimed in claim 1, It is characterized in that The limiting member is a long strip structure and is made of steel to ensure strength.

3. An actuator pin structure for preventing valve bridge from bouncing failure as claimed in claim 2, It is characterized in that The limiting member adopts a limiting pin.

4. An actuator pin structure for preventing valve bridge from bouncing failure as claimed in claim 1, It is characterized in that The limiting member is fixedly connected to the limiting hole.

5. An actuator pin structure for preventing valve bridge from bouncing failure as claimed in claim 1, It is characterized in that The limiting hole penetrates along the radial direction of the actuating pin, and the limiting members extend from both sides of the actuating pin.

6. A valve bridge, It is characterized in that It comprises an actuator pin structure for preventing valve bridge bounce failure as described in any one of claims 1 to 5, and also comprises a valve bridge body, a braking rocker arm and an exhaust rocker arm, wherein the braking rocker arm is located above the actuator pin and presses the actuator pin when pressed downward; a crush mechanism is arranged inside the valve bridge body, and one end of the exhaust rocker arm is located above the crush mechanism to drive the crush mechanism to operate.

7. A valve bridge as claimed in claim 6, It is characterized in that The extending direction of the limiting member is perpendicular to the extending direction of the valve bridge body.

8. A valve bridge as claimed in claim 6, It is characterized in that A mounting hole is provided on one side of the valve bridge body, and the actuator pin is arranged in the mounting hole.

9. A valve bridge as claimed in claim 8, It is characterized in that The surface where the limiting hole is located is processed into a plane, and the inner surface of the mounting hole is matched with the shape of the surface where the limiting hole is located to form a non-rotating structure to limit the rotation of the execution pin.

10. An engine, It is characterized in that Comprising a valve bridge as described in any one of claims 6-9.

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