CN219728163U

CN219728163U - Air-break brake valve and agricultural vehicle

Info

Publication number: CN219728163U
Application number: CN202223197863.1U
Authority: CN
Inventors: 陈崇转; 张杨; 林亮亮; 胡志国; 叶芳余; 林一强
Original assignee: Ruili Group Ruian Auto Parts Co Ltd
Current assignee: Ruili Group Ruian Auto Parts Co Ltd
Priority date: 2022-11-30
Filing date: 2022-11-30
Publication date: 2023-09-22
Anticipated expiration: 2032-11-30

Abstract

The utility model discloses an air-break brake valve and an agricultural vehicle, comprising: the valve body, the first return spring return unit, the second return spring return unit and the swing arm assembly, wherein the second return spring return unit is connected with the inner wall of the valve body and is used as a gas passing part of the air inlet channel, and the second return spring return unit is arranged on the path of the up-down return movement of the piston and forms a control structure with the piston, wherein the control structure can control one channel of the air inlet channel and the air outlet channel to be opened and the other channel to be closed; the swing arm assembly is rotatably arranged on the valve body and connected with the double-spring return assembly. The utility model solves the problem that the brake valve in the conventional air brake device of the agricultural vehicle cannot carry out agile operation on the vehicle.

Description

Air-break brake valve and agricultural vehicle

Technical Field

The utility model belongs to the technical field of agricultural vehicle braking, and particularly relates to an air-break brake valve and an agricultural vehicle.

Background

In agricultural vehicles, the air-break brake valve is mainly arranged in an air brake pipeline and is a brake for operating the vehicle during driving.

At present, a Chinese patent is disclosed, the patent name is an air brake device for agricultural vehicles, and the application number is: CN201310598006.9, publication date: 2014.05.28 the diesel engine is connected with the belt pulley through the belt, the belt pulley is connected with inflating pump, air-vent valve, gas pitcher in proper order, the gas pitcher is connected with brake valve, manual valve respectively, brake pedal passes through brake push rod and is connected with the brake valve, the brake valve passes through foot control quick release valve and is connected with two air chambers respectively, the manual valve passes through manual quick release valve and is connected with two air chambers respectively, the air chamber is connected with the brake drum of installing in the rear wheel, install the brake block with it complex in the brake drum, the air chamber passes through air chamber push rod, brake eccentric cam pole and brake block cooperation connection.

But the brake valve in the air brake device of the agricultural vehicle can not carry out agile operation on the vehicle.

Disclosure of Invention

Aiming at the defects of the prior art, the utility model provides an air-break brake valve and an agricultural vehicle, and the air-break brake valve solves the problem that a brake valve in an existing air-break brake device of the agricultural vehicle cannot operate the vehicle rapidly.

The utility model aims at realizing the following technical scheme:

in certain embodiments, there is provided an air break brake valve comprising:

a valve body having an intake passage and an exhaust passage;

the first return spring return unit comprises a hollow piston with a limit part on the outer side, a limit ring which is in sliding connection with the piston and limits the sliding range of the piston due to the obstruction of the limit part, and a double-spring return assembly which is connected with the piston and promotes the piston to return up and down, wherein the limit ring is arranged at a position in the valve body, and the first return spring return unit is used as a gas passing part of the exhaust channel;

a second return spring return unit connected to an inner wall of the valve body and serving as a gas passing portion of the intake passage, and forming a control structure with the piston capable of controlling one of the intake passage and the exhaust passage to open and the other to close on a path of the up-down return movement of the piston;

the swing arm assembly is rotationally arranged on the valve body and connected with the double-spring return assembly.

In some embodiments, the states of the pneumatic brake valve include a running state and a braking state;

in a braking state of the air-break brake valve, the lower end opening of the piston is separated from the second return spring return unit, so that the exhaust channel is opened and the air inlet channel is closed;

under the driving state of the air-break brake valve, the lower end opening of the piston is contacted with the second return spring return unit under the rotating action of the swing arm assembly along the designated direction, and the second return spring return unit is contracted by a preset amplitude, so that the exhaust channel is closed and the air inlet channel is opened.

In some embodiments, during the process of the air-break brake valve changing from the braking state to the driving state, the double-spring return assembly starts to move towards the initial position and gradually reduces the contraction degree under the rotation action of the swing arm assembly in the direction opposite to the designated direction until the double-spring return assembly returns to the initial position and returns to the original state;

the two-spring return assembly is in contact with the second return spring return unit and enables the second return spring return unit to perform predetermined displacement, so that the exhaust passage is closed and the air inlet passage is opened.

In some embodiments, a port of the exhaust passage is located at the upper end of the valve body and serves as an exhaust port; a passage opening of the air inlet passage is positioned at the lower end of the valve body and is used as an air inlet; the other passage opening of the exhaust passage and the other passage opening of the intake passage share an air port and are positioned on the left side wall of the valve body as an output port communicated with a brake actuator.

In certain embodiments, further comprising: the valve cover is provided with a vertical sliding hole and used for limiting the up-and-down movement of the double-spring return assembly, and the valve cover is arranged at the exhaust port of the valve body and is in sliding connection with the double-spring return assembly at the sliding hole.

In some embodiments, the valve body further has a narrowed mouth portion therein adjacent the output port, the narrowed mouth portion being vertically aligned with the piston and having a caliber greater than an outer diameter of the piston.

In certain embodiments, the two-spring return assembly comprises:

a push rod, the inside of which is provided with a flow channel from the lower end to two sides close to the upper end and a circumferential protruding part near the lower end, the push rod is in sliding connection with the inner wall of the valve cover and the upper end is in contact connection with the swinging component,

the upper end of the first return spring is sleeved on the lower end of the ejector rod and is stopped at the protruding part of the ejector rod, and the lower end of the first return spring is sleeved on the upper end of the piston and is stopped at the limiting part of the piston;

the second return spring is sleeved on the piston, the upper end of the second return spring is stopped at the limiting part of the piston, and the lower end of the second return spring is stopped at the top surface of the limiting ring.

In certain embodiments, the second return spring return unit comprises:

the air inlet connector is hollow in the interior and is arranged at the air inlet of the valve body;

a blocking part movably arranged at the lower edge of the narrow opening part in the valve body; and

and the valve return spring vertically connects the blocking part with the air inlet joint.

In certain embodiments, the stop collar further comprises an O-ring disposed circumferentially on an inner sidewall of the stop collar and an outer sidewall of the stop collar.

In some embodiments, an agricultural vehicle includes the air brake valve.

The beneficial effects of the utility model are as follows: the air-break brake valve is a single-cavity brake valve, is provided with an air inlet, an air outlet and an air outlet, has a simple structure and a small and exquisite appearance, and is suitable for vehicles with low speed and adopting a single-pipeline brake system, such as agricultural vehicles; the air-break brake valve adopts a swing arm type operation mode, the required operation force is small, the output air pressure value is reduced along with the increase of the operation force, the braking efficiency can be changed in proportion to the change of the operation force of the brake pedal, the sensitive follow-up control on the braking process and the releasing process of the vehicle can be realized, and the problem that the brake valve in the conventional air-break brake device of the agricultural vehicle cannot carry out agile operation on the vehicle is solved.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions of the prior art, the drawings that are needed in the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a block diagram of an air brake valve in a driving condition according to an exemplary embodiment;

fig. 2 is a block diagram of a braking state of the air break brake valve according to an exemplary embodiment.

Fig. 3 is a block diagram of an air break brake valve provided in an exemplary embodiment.

Reference numerals: 10. a valve body; 101. an air intake passage; 102. an exhaust passage; 103. an air inlet; 104. an exhaust port; 105. an output port; 106. narrowing the mouth; 20. a first return spring return unit; 201. a piston; 202. a limiting ring; 203. a double spring return assembly; 2031. a push rod; 2032. a first return spring; 2033. a second return spring; 30. a second return spring return unit; 301. an air inlet joint; 302. a blocking part; 303. a valve return spring; 40. a swing arm assembly; 50. a valve cover; 60. an O-shaped sealing ring; 70. and (5) a return torsion spring.

Detailed Description

For a better understanding of the technical solution of the present utility model, the following detailed description of the embodiments of the present utility model refers to the accompanying drawings.

It should be understood that the described embodiments are merely some, but not all, embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

As shown in fig. 1 and 2, in one embodiment, an air break brake valve is provided, which is suitable for an agricultural vehicle, and the state of the air break brake valve includes a running state and a braking state; this air break brake valve includes: the valve body 10, the first return spring 2032 return unit 20, the second return spring 2033 return unit, and the swing arm assembly 40.

The valve body 10 has an intake passage 101 for intake air and an exhaust passage 102 for exhaust gas; in one embodiment, a port of the exhaust passage 102 is located at the upper end of the valve body 10 as the exhaust port 104; a passage opening of the intake passage 101 is located at the lower end of the valve body 10 as an intake port 103; the other passage ports of the exhaust passage 102 and the intake passage 101 share one port and are located on the left side wall of the valve body 10 as an output port 105 communicating with the brake actuator; the whole valve body 10 is hollow vertically inside. In one embodiment, the outlet 105 is located approximately midway in the valve body 10, wherein the portion of the outlet 105 is laterally protruding from the side wall of the valve body 10. In an embodiment, the valve body 10 further has a narrowed opening 106 near the output port 105, the narrowed opening 106 is formed by the circumferential protrusion of the inner wall of the valve body 10 near the output port 105 toward the central axis of the interior of the valve body 10, the diameter of the narrowed opening 106 is smaller than the diameter of the nearby portion in the valve body 10, the narrowed opening 106 is aligned with the piston 201 in the vertical direction, and the diameter is larger than the outer diameter of the piston 201.

The first return spring 2032 return unit 20 includes a hollow piston 201 having a stopper on the outer side thereof, a stopper ring 202 which is slidably connected to the piston 201 and restricts the sliding range of the piston 201 due to the obstruction of the stopper, and a two-spring return assembly 203 which is connected to the piston 201 and urges the piston 201 to return upward and downward, the stopper ring 202 being provided at a position within the valve body 10, the first return spring 2032 return unit 20 being a gas-passing portion of the exhaust passage 102;

in an embodiment, the piston 201 is arranged vertically and the middle portion penetrates up and down, and the piston 201 has a circumferentially protruding stopper near the upper end face.

In an embodiment, the valve body 10 has a protruding portion protruding circumferentially on an inner wall near the output port 105, a groove above the first limiting portion is formed on the inner wall of the valve body 10, a clamping portion protruding the inner wall of the valve body 10 is disposed in the groove of the valve body 10, a distance between a right end of the clamping portion and a central axis of the valve body 10 is smaller than a distance between the inner wall of the valve body 10 near the protruding portion and the central axis of the valve body 10, and the limiting ring 202 is disposed between the protruding portion and the clamping portion, and the upper end face and the lower end face are in contact with the protruding portion and the clamping portion, so that the protruding portion and the clamping portion together form a position limitation on the limiting ring 202 to prevent a position variation of the limiting ring 202.

In an embodiment, further comprising: the valve cover 50 is provided with a vertical sliding hole and is used for limiting the up-and-down movement of the double-spring return assembly 203, and the valve cover 50 is arranged at the exhaust port 104 of the valve body 10 and is in sliding connection with the double-spring return assembly 203 at the sliding hole. In one embodiment, the lower end of the valve cover 50 is embedded in the valve body 10 at the exhaust port 104, and the sliding hole is located at the middle position of the valve cover 50.

In one embodiment, the two-spring return assembly 203 comprises: a carrier rod 2031, a first return spring 2032, and a second return spring 2033. The inside of the ejector rod 2031 is provided with a flow passage from the lower end to two sides close to the upper end and a circumferential protruding part near the lower end, the ejector rod 2031 is in sliding connection with the inner wall of the valve cover 50, and the upper end is in contact connection with the swing assembly; the upper end of the first return spring 2032 is sleeved on the lower end of the ejector rod 2031 and is stopped at the protruding part of the ejector rod 2031, and the lower end of the first return spring is sleeved on the upper end of the piston 201 and is stopped at the limiting part of the piston 201; the second return spring 2033 is sleeved on the piston 201, and the upper end of the second return spring 2033 is stopped at the limit part of the piston 201 and the lower end is stopped at the top surface of the limit ring 202.

The second return spring 2033 is connected to the inner wall of the valve body 10 and serves as a gas passing portion of the intake passage 101, and the second return spring 2033 is on the path of the up-down return movement of the piston 201 and forms a control structure with the piston 201 that can control one of the intake passage 101 and the exhaust passage 102 to open and close the other;

in an embodiment, the second return spring 2033 return unit includes: an air intake joint 301, a blocking portion 302, and a valve return spring 303. The intake joint 301 is hollow and provided at the intake port 103 of the valve body 10, the blocking portion 302 is movably disposed at the lower edge of the narrowed opening 106 in the valve body 10, and the valve return spring 303 vertically connects the blocking portion 302 with the intake joint 301. In one embodiment, the air inlet connector 301 is embedded at the air inlet 103 of the valve body 10, the blocking portion 302 is in a block shape, the upper end face of the blocking portion abuts against the lower edge of the narrowed opening portion 106 and covers the opening of the narrowed opening portion 106, the upper end of the valve return spring 303 is connected with the blocking portion 302, and the lower end is connected with the inner wall of the air inlet connector 301.

The swing arm assembly 40 is rotatably disposed on the valve body 10 and is connected to the double spring return assembly 203. In one embodiment, the rocker arm assembly is in contact with the upper end surface of the carrier rod 2031.

In one embodiment, the states of the air-break brake valve comprise a running state and a braking state;

in the braking state of the air brake valve, the lower end opening of the piston 201 is separated from the return unit of the second return spring 2033, so that the exhaust passage 102 is opened and the intake passage 101 is closed;

in the running state of the air brake valve, the opening at the lower end of the piston 201 contacts with the second return spring 2033 under the rotation action of the swing arm assembly 40 along the designated direction, and the second return spring 2033 contracts by a predetermined magnitude, so that the exhaust passage 102 is closed and the intake passage 101 is opened.

In one embodiment, the O-ring 60 is circumferentially disposed on the inner sidewall of the stop collar 202 and the outer sidewall of the stop collar 202 to achieve a sealing effect in the contact areas between the inner and outer sides of the stop collar 202.

The assembly method of key components comprises the following steps:

the swing arm assembly 40 is rotatably connected to the valve body 10 through a pin shaft assembly, and presses the ejector rod 2031 downwards under the action of a return torsion spring; the valve body 10 is internally provided with a valve cover 50 at the upper half part, a push rod 2031 is arranged at the inner side of the valve cover 50, a first return spring 2032 is arranged below the push rod 2031, the first return spring 2032 acts on the piston 201 upwards, a second return spring 2033 is arranged below the piston 201, the initial state of the second return spring 2033 is in a compressed state, and a limiting ring 202 is arranged below the second return spring 2033; the lower half part of the valve body 10 is provided with an air inlet joint 301, the air inlet joint 301 is provided with a valve return spring 303, and the valve return spring 303 presses the blocking part 302 on the narrowed opening 106 of the valve body 10; o-type sealing rings are respectively assembled on the inner ring, the outer ring and the outer ring of the air inlet joint 301 of the limiting ring 202 to play a role in sealing.

As shown in fig. 2 and 3, the braking process:

when a driver steps on the pedal, a connecting rod mechanism on the vehicle acts on a left pin shaft hole of the swing arm assembly 40 to overcome the return torsion spring 70 and then enable the left side of the swing arm assembly 40 to move downwards, and the swing arm assembly 40 moves around the pin shaft; the force received above the ejector rod 2031 is reduced, the ejector rod 2031 and the piston 201 move upward under the action of the first return spring 2032 and the second return spring 2033, the opening at the lower end of the piston 201 is separated from the blocking portion 302, and the blocking portion 302 is attached to the narrowed opening 106 on the valve body 10, so that the air intake passage 101 is closed to open the air exhaust passage 102, that is, at this time, the passage of the air intake 103 through the air intake 103 to the output port 105 is closed, and the air flows from the opening at the lower end of the piston 201 to the inner flow passage of the ejector rod 2031 through the output port 105 and is discharged to the atmosphere from the vicinity of the air exhaust port 104, thereby realizing braking of the vehicle.

As shown in fig. 1 and 3, the braking process is released:

when the driver releases the pedal, the link mechanism on the vehicle acts on the swing arm assembly 40, and simultaneously under the dual action of the return torsion spring 70, the swing arm assembly 40 moves in the opposite direction to the braking process, the ejector rod 2031 is pushed to move downwards, the ejector rod 2031 pushes the first return spring 2032 and the second return piston 201 to move downwards, and simultaneously the acting force of the second return spring 2033 of the piston 201 is overcome in the downward movement process of the piston 201, so that the lower end opening of the piston 201 is attached to the blocking portion 302, and meanwhile, the blocking portion 302 is separated from the narrowed opening 106 on the valve body 10, so that the exhaust passage 102 is closed, and the air inlet passage 101 is opened. At this time, gas is input to the output port 105 via the gas inlet 103 and is input from the output port 105 to a subsequent brake actuator, thereby achieving vehicle brake release.

The air-break brake valve is a single-cavity brake valve and is provided with an air inlet 103, an air outlet 105 and an air outlet 104, so that the air-break brake valve is simple in structure, small and exquisite in appearance and suitable for being used on a low-speed vehicle adopting a single-pipeline brake system, such as an agricultural vehicle; the swing arm type operating mode is adopted in the air-break brake valve, the required operating force is small, the output air pressure value is reduced along with the increase of the operating force, the braking efficiency can be changed in proportion to the change of the operating force of the brake pedal, sensitive follow-up control in the vehicle braking process and the releasing process can be realized, the swing arm assembly 40 of the air-break brake valve is subjected to the action of torsion spring force in advance in the accident state, the return torsion spring 70 is continuously compressed in the braking process, the operating force is larger and larger, and compared with the pneumatic brake, if the same operating force is required to be ensured, the acting force applied to the piston 201 is smaller, so the acting area of the piston 201 is required to be smaller than that of the pneumatic brake. The problem that a brake valve in the conventional air brake device of the agricultural vehicle cannot operate the vehicle rapidly is solved.

The foregoing description of the preferred embodiment(s) is (are) merely intended to illustrate the embodiment(s) of the present utility model, and it is not intended to limit the embodiment(s) of the present utility model to the particular embodiment(s) described.

Claims

1. The air break brake valve is characterized by comprising:

a valve body having an intake passage and an exhaust passage;

2. The air break brake valve according to claim 1, wherein the state of the air break brake valve comprises a service state and a braking state;

3. The air break brake valve according to claim 1, characterized in that: a passage opening of the exhaust passage is positioned at the upper end of the valve body and is used as an exhaust port; a passage opening of the air inlet passage is positioned at the lower end of the valve body and is used as an air inlet; the other passage opening of the exhaust passage and the other passage opening of the intake passage share an air port and are positioned on the left side wall of the valve body as an output port communicated with a brake actuator.

4. The air break brake valve according to claim 3, further comprising: the valve cover is provided with a vertical sliding hole and used for limiting the up-and-down movement of the double-spring return assembly, and the valve cover is arranged at the exhaust port of the valve body and is in sliding connection with the double-spring return assembly at the sliding hole.

5. The air break brake valve according to claim 4, wherein: the valve body is internally provided with a narrowing part close to the output port, the narrowing part is vertically aligned with the piston, and the caliber of the narrowing part is larger than the outer diameter of the piston.

6. The service brake valve according to claim 5, wherein the two spring return assembly comprises:

the ejector rod is internally provided with flow channels from the lower end to two sides close to the upper end and a circumferential protruding part near the lower end, and is in sliding connection with the inner wall of the valve cover, and the upper end is in contact connection with the swing arm assembly;

7. The air break brake valve according to claim 3, wherein the second return spring return unit comprises:

8. The air break brake valve according to claim 1, further comprising O-rings circumferentially disposed on an inner sidewall of the stop collar and an outer sidewall of the stop collar.

9. An agricultural vehicle comprising a service brake valve according to any one of claims 1 to 8.