Valve brake rocker arm assembly

Abstract

The utility model provides a valve brake rocker arm assembly. One end of the rocker arm is connected with the valve bridge through the first connecting piece, the valve bridge is located below the rocker arm, the first valve is vertically arranged below the first end of the valve bridge, a through hole for the second valve to penetrate through is vertically formed in the second end of the valve bridge, the telescopic mechanism is arranged on the rocker arm, and the brake piece is arranged at the extending end of the telescopic mechanism. The telescopic mechanism can drive the brake part to move between the first position and the second position, the brake part moves from the second position to the first position, the brake part drives the second air valve to be opened, and therefore when an engine needs to be braked, the brake part is driven by the telescopic mechanism to move from the second position to the first position, and the brake part drives the second air valve to be independently opened. Compared with existing exhaust braking and air release braking, the engine braking device has the advantages that the braking efficiency is high, the structure is simple, and the braking requirement of different vehicles during long downhill is met.

Description

Technical Field

[0001] The utility model relates to the field of engines, in particular to a valve brake rocker arm assembly. Background Art

[0002] When the vehicle is traveling on a long downhill slope, in order to avoid prolonged brake failure, it is usually possible to activate auxiliary braking, such as engine braking, that is, the exhaust valve is opened at the end of the compression stroke when the engine is dragging backward. At this time, the work done by the engine compressed gas is consumed as the high-pressure gas is discharged, thereby achieving the purpose of consuming braking energy and decelerating. Among them, exhaust braking and blow-off braking are existing technologies. Exhaust braking is to add a butterfly valve to the exhaust pipe. When braking, the butterfly valve is closed to increase the engine braking torque through the exhaust back pressure to achieve the braking purpose; blow-off braking is to open the exhaust valve slightly, so that the high-temperature and high-pressure air generated by the engine in the compression stroke is discharged from the exhaust valve to the airway, and the power is consumed through the piston pump air loss, thereby achieving the braking purpose.

[0003] However, since the braking efficiency of exhaust brake is only about 20% of the engine power, and the braking efficiency of deflation brake is about 50% of the engine power, the existing exhaust brake and deflation brake are difficult to meet the braking requirements of heavy vehicles. Utility Model Content

[0004] In view of this, an embodiment of the utility model provides a valve brake rocker arm assembly to solve the problem of low braking efficiency of existing exhaust brakes and deflation brakes.

[0005] To achieve the above purpose, the present invention provides the following technical solutions:

[0006] A valve brake rocker arm assembly, comprising: a rocker arm, a first connecting member, a valve bridge, a first valve, a second valve, a brake member and a telescopic mechanism;

[0007] One end of the rocker arm is connected to the valve bridge through a first connecting piece, and the valve bridge is located below the rocker arm;

[0008] The first valve is vertically disposed below the first end of the valve bridge;

[0009] A through hole for the second valve to pass through is vertically opened at the second end of the valve bridge;

[0010] The telescopic mechanism is arranged on the rocker arm;

[0011] The brake member is arranged at the extended end of the telescopic mechanism. The telescopic mechanism can drive the brake member to move between the first position and the second position. When the brake member moves from the second position to the first position, the brake member drives the second valve to open.

[0012] Preferably, when the brake member is in the first position, the brake member is in line with the second valve.

[0013] Preferably, the brake member has a first hinge point and a second hinge point, the first hinge point is located at the first end of the brake member, the first hinge point is hinged to the movable hinge point of the rocker arm, wherein the movable hinge point is located between the first connecting member and the telescopic mechanism;

[0014] The extended end of the telescopic mechanism is hinged to the second hinge point.

[0015] Preferably, the rocker arm is provided with a movable cavity for installing the telescopic mechanism.

[0016] Preferably, it further comprises: a second connecting member;

[0017] The movable cavity is laterally opened on the rocker arm;

[0018] The rocker arm is provided with a movable groove for the second connecting member to move, wherein the movable groove is communicated with the movable cavity;

[0019] The first end of the second connecting member is hinged to the second hinge point, and the second end is hinged to the extended end of the telescopic mechanism.

[0020] Preferably, the telescopic mechanism is arranged at one end of the movable cavity away from the movable hinge point.

[0021] Preferably, it also includes: an elastic member;

[0022] The elastic member is arranged in the movable cavity and is located between the telescopic mechanism and the movable hinge point.

[0023] Preferably, the elastic member is a spring.

[0024] Preferably, the telescopic mechanism is a cylinder.

[0025] Based on the valve brake rocker arm assembly provided by the utility model, one end of the rocker arm is connected to the valve bridge through a first connecting member, the valve bridge is located below the rocker arm, and the first valve is vertically arranged below the first end of the valve bridge, and a through hole for the second valve to pass through is vertically opened at the second end of the valve bridge, a telescopic mechanism is arranged on the rocker arm, and a brake member is arranged at the protruding end of the telescopic mechanism, and the telescopic mechanism can drive the brake member to move between the first position and the second position, and the brake member moves from the second position to the first position, and the brake member drives the second valve to open. Through the valve brake rocker arm assembly disclosed above, when the engine needs to brake, the brake member is driven to move from the second position to the first position through the telescopic mechanism, so that the brake member drives the second valve to open separately, so that the pressure in the cylinder is released, and the engine braking can be realized. Compared with the existing exhaust brake and deflation brake, the braking efficiency of the present application is not only high, but also simple in structure, which can meet the braking requirements of different vehicles on long downhill slopes. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0027] Figure 1 A schematic diagram of the structure of the valve brake rocker arm assembly in a braking state provided by an embodiment of the utility model;

[0028] Figure 2 A schematic structural diagram of a valve brake rocker arm assembly in a non-braking state provided by an embodiment of the utility model.

[0029] Among them, there are a rocker arm 1, a first connecting member 2, a valve bridge 3, a first valve 4, a second valve 5, a brake member 6, a telescopic mechanism 7, a second connecting member 8, and an elastic member 9. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0031] The utility model embodiment provides a valve brake rocker arm assembly, see Figure 1 and Figure 2 , Figure 1 Schematic diagram of the structure of the valve brake rocker arm assembly in the braking state, the valve brake rocker arm assembly includes: a rocker arm 1, a first connecting member 2, a valve bridge 3, a first valve 4, a second valve 5, a brake member 6 and a telescopic mechanism 7;

[0032] One end of the rocker arm 1 is connected to the valve bridge 3 through the first connecting member 2, and the valve bridge 3 is located below the rocker arm 1;

[0033] The first valve 4 is vertically arranged below the first end of the valve bridge 3;

[0034] A through hole for the second valve 5 to pass through is vertically opened at the second end of the valve bridge 3;

[0035] The telescopic mechanism 7 is arranged on the rocker arm 1;

[0036] The brake member 6 is disposed at the extended end of the telescopic mechanism 7. The telescopic mechanism 7 can drive the brake member 6 to move between the first position and the second position. When the brake member 6 moves from the second position to the first position, the brake member 6 drives the second valve 5 to open.

[0037] It should be noted that, when the engine is in normal working condition, the rotation of the rocker arm 1 can drive the valve bridge 3 to move downward, and the valve bridge 3 can press downward at the same time to open the first valve 4 and the second valve 5. When engine braking is required, the brake member 6 is driven to move from the second position to the first position through the telescopic mechanism 7, so that the brake member 6 can drive the second valve 5 to open alone, thereby releasing the pressure in the cylinder and realizing engine braking.

[0038] In the embodiment of the utility model, one end of the rocker arm 1 is connected to the valve bridge 3 through the first connecting member 2. The valve bridge 3 is located below the rocker arm 1, and the first valve 4 is vertically arranged below the first end of the valve bridge 3, and a through hole for the second valve 5 to pass through is vertically opened at the second end of the valve bridge 3. The telescopic mechanism 7 is arranged on the rocker arm 1, and the brake member 6 is arranged at the protruding end of the telescopic mechanism 7. The telescopic mechanism 7 can drive the brake member 6 to move between the first position and the second position. The brake member 6 moves from the second position to the first position, and the brake member 6 drives the second valve 5 to open. Through the valve brake rocker arm assembly disclosed above, when the engine needs to brake, the brake member 6 is driven to move from the second position to the first position through the telescopic mechanism 7, so that the brake member 6 drives the second valve 5 to open separately, so that the pressure in the cylinder is released, and the engine braking can be realized. Compared with the existing exhaust brake and deflation brake, the braking efficiency of the present application is not only high, but also the structure is simple, which can meet the braking requirements of different vehicles on long downhill slopes.

[0039] Specifically, when the brake member 6 is in the first position, the brake member 6 and the second valve 5 are in a collinear relationship.

[0040] It should be noted that when the brake member 6 is in the first position, the brake member 6 is in line with the second valve 5, so that the brake member 6 can be lowered by the telescopic mechanism 7 to open the second valve 5. When the telescopic mechanism 7 drives the brake member 6 to move from the first position to the second position, the first valve 4 and the second valve 5 can be driven to open at the same time through the valve bridge 3.

[0041] Further, the brake member 6 has a first hinge point and a second hinge point, the first hinge point is located at the first end of the brake member 6, and the first hinge point is hinged to the movable hinge point of the rocker arm 1, wherein the movable hinge point is located between the first connecting member 2 and the telescopic mechanism 7;

[0042] The extended end of the telescopic mechanism 7 is hinged to the second hinge point.

[0043] It should be noted that by setting the first hinge point and the second hinge point on the brake member 6, and setting the first hinge point at the first end of the brake member 6, and hingedly connecting the first hinge point to the movable hinge point of the rocker arm 1, and making the movable hinge point between the first connecting member 2 and the telescopic mechanism 7, the protruding end of the telescopic mechanism 7 is hingedly connected to the second hinge point, and then when the protruding end of the telescopic mechanism 7 is extended or retracted, it can drive the brake member 6 to rotate around the movable hinge point, and when the brake member 6 rotates to the second position, it can drive the second valve 5 to open.

[0044] Specifically, the rocker arm 1 is provided with a movable cavity for installing the telescopic mechanism 7 .

[0045] It should be noted that, by providing a movable cavity for installing the telescopic mechanism 7 in the rocker arm 1, the space utilization rate can be effectively improved and the overall aesthetics can be improved.

[0046] Further, the valve brake rocker arm assembly further includes: a second connecting member 8;

[0047] The movable chamber is laterally opened on the rocker arm 1;

[0048] The rocker arm 1 is provided with a movable groove for the second connecting member 8 to move, wherein the movable groove is communicated with the movable cavity;

[0049] The first end of the second connecting member 8 is hinged to the second hinge point, and the second end is hinged to the extended end of the telescopic mechanism 7 .

[0050] It should be noted that, by providing the second connecting member 8, and opening the movable cavity horizontally on the rocker arm 1, the rocker arm 1 opens a movable groove for the movement of the second connecting member 8, and the movable groove is connected to the movable cavity, and the first end of the second connecting member 8 is hinged to the second hinge point, and the second end is hinged to the extended end of the telescopic mechanism 7, so that the extended end of the telescopic mechanism 7 can drive the brake member 6 to rotate around the movable hinge point through the second connecting member 8 when it is extended or retracted, and when the brake member 6 rotates to the second position, it can drive the second valve 5 to open.

[0051] Specifically, the telescopic mechanism 7 is arranged at one end of the movable cavity away from the movable hinge point.

[0052] It should be noted that the telescopic mechanism 7 is arranged at one end of the movable cavity away from the movable hinge point, so that when the protruding end of the telescopic mechanism 7 is extended toward the movable hinge point, it can drive the brake member 6 to rotate clockwise, so that the brake member 6 moves from the second position to the first position, and when the protruding end of the telescopic mechanism 7 is retracted away from the movable hinge point, it can drive the brake member 6 to rotate counterclockwise, so that the brake member 6 moves from the first position to the second position.

[0053] Further, the valve brake rocker arm assembly further includes: an elastic member 9;

[0054] The elastic member 9 is disposed in the movable cavity and is located between the telescopic mechanism 7 and the movable hinge point.

[0055] It should be noted that the elastic member 9 is arranged in the movable cavity and between the telescopic mechanism 7 and the movable hinge point, so that when the protruding end of the telescopic mechanism 7 is extended, the elastic member 9 can produce elastic deformation. When the force of extending the telescopic mechanism 7 is removed, the elastic restoring force generated by the elastic member 9 can drive the protruding end of the telescopic mechanism 7 away from the movable hinge point, thereby causing the brake member 6 to rotate counterclockwise and move the brake member 6 from the first position to the second position.

[0056] Specifically, the elastic member 9 is a spring.

[0057] It should be noted that the elastic member 9 can be a spring or other components that are deformed and store energy under the action of the extended end of the telescopic mechanism 7. Therefore, the elastic member 9 is not limited to a spring, and those skilled in the art can make conventional replacements according to needs.

[0058] Specifically, the telescopic mechanism 7 is a cylinder.

[0059] It should be noted that the telescopic mechanism 7 can be a cylinder, a hydraulic cylinder, or an electric push rod or other structure that can drive the brake member 6 to move. Those skilled in the art can choose according to needs.

[0060] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A valve brake rocker arm assembly, characterized in that: include: A rocker arm, a first connecting member, a valve bridge, a first valve, a second valve, a brake member and a telescopic mechanism; One end of the rocker arm is connected to the valve bridge through the first connecting member, and the valve bridge is located below the rocker arm; The first valve is vertically disposed below the first end of the valve bridge; A through hole for the second valve to pass through is vertically opened at the second end of the valve bridge; The telescopic mechanism is arranged on the rocker arm; The brake member is disposed at the extended end of the telescopic mechanism. The telescopic mechanism can drive the brake member to move between a first position and a second position. When the brake member moves from the second position to the first position, the brake member drives the second valve to open.

2. The valve brake rocker arm assembly according to claim 1, characterized in that: When the braking member is in the first position, the braking member is in line with the second valve.

3. The valve brake rocker arm assembly according to claim 1, characterized in that: The brake member has a first hinge point and a second hinge point, wherein the first hinge point is located at a first end of the brake member, and the first hinge point is hinged to a movable hinge point of the rocker arm, wherein the movable hinge point is located between the first connecting member and the telescopic mechanism; The extended end of the telescopic mechanism is hinged to the second hinge point.

4. The valve brake rocker arm assembly according to claim 3, characterized in that: The rocker arm is provided with an active cavity for installing the telescopic mechanism.

5. The valve brake rocker arm assembly according to claim 4, characterized in that: Also includes: a second connecting member; The movable chamber is laterally opened on the rocker arm; The rocker arm is provided with a movable groove for the second connecting member to move, wherein the movable groove is communicated with the movable cavity; The first end of the second connecting member is hinged to the second hinge point, and the second end is hinged to the extended end of the telescopic mechanism.

6. The valve brake rocker arm assembly according to claim 5, characterized in that: The telescopic mechanism is arranged at one end of the movable cavity away from the movable hinge point.

7. The valve brake rocker arm assembly according to claim 6, characterized in that: Also includes: Elastic parts; The elastic member is arranged in the movable cavity and is located between the telescopic mechanism and the movable hinge point.

8. The valve brake rocker arm assembly according to claim 7, characterized in that: The elastic member is a spring.

9. The valve brake rocker arm assembly according to any one of claims 1 to 8, characterized in that: The telescopic mechanism is a cylinder.

Images