Variable pressure brake valve for automobile brake

Abstract

The utility model discloses a variable pressure brake valve for an automobile brake in the related technical field of variable pressure brake valves, which comprises a brake pressure regulating part and a brake regulating and controlling part, an upper cavity and a lower cavity are arranged in the brake pressure regulating part, an upper pressure regulating diaphragm plate is mounted in the upper cavity and fixedly mounted on a valve rod, and a lower pressure regulating diaphragm plate is mounted in the lower cavity and fixedly mounted on the valve rod. A buffer plate is arranged above the upper pressure adjusting diaphragm plate in parallel, an upper pressure adjusting spring is arranged between the bottom face of the buffer plate and the top face of the upper pressure adjusting diaphragm plate, a sealing ring is fixedly arranged on the outer side of the position, close to the lower portion, of the valve rod, and in the normal pressure state, the position where the sealing ring is located corresponds to the position of the second pressure adjusting air outlet. The brake pressure regulating part and the brake regulating and controlling part are of an integrally-formed structure, a ventilation channel is formed in the brake pressure regulating part and the brake regulating and controlling part, corresponding connection of air inlets and air outlets of the two parts is achieved, an outer side connecting pipeline is not needed, the overall structural stability is good, the two pressure regulating air outlets are formed in the brake pressure regulating part, and pressure can be accurately regulated according to the air inlet amount and the air pressure.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the related technical field of variable pressure brake valve, concretely relates to the variable pressure brake valve for automobile brake. BACKGROUND

[0002] The automobile brake refers to the action of making the vehicle decelerate or stop through the brake pedal (brake pedal), and the process mainly relies on the friction between the brake pad and the brake disc to generate resistance, thereby realizing the deceleration or stop of the vehicle. The ordinary air brake system is composed of a brake control mechanism, a double-circuit brake mechanism, a central disc brake mechanism, a brake, an air compressor and the like, wherein the central disc brake mechanism comprises a parking brake handle, a brake cable and a central disc brake, and the brake valve is a main control device in the automobile driving brake system. At present, the air flow between the brake control device and the brake pressure regulating device of the automobile brake valve on the market is small, the brake sensitivity is poor, the brake reaction time is long, the application number: CN201820038826.0 discloses an automobile brake automatic variable pressure brake valve, the air flow between the brake control device and the brake pressure regulating device of the automobile brake valve is large, the brake sensitivity is high, the brake is light and the brake is heavy, the vehicle is safe and efficient transportation and reduces the accident rate, although the use effect of the variable pressure brake valve is improved, but the brake control device and the brake pressure regulating device of the brake valve are designed in a split structure, the stability and air tightness of the pipeline connection will have a certain influence on the reaction sensitivity of the brake valve, at the same time, the second lower chamber is arranged between the second gas outlet and the third gas inlet in the brake pressure regulating device, the valve and the sealing sleeve are arranged in the second lower chamber, when the gas amount entering from the third gas inlet is small and the gas pressure is low, the gas pressure is lower after the pressure regulating treatment of the valve and the sealing sleeve, which has a certain influence on the sensitivity of the brake valve, and the spring buffer pressure regulating structure arranged in the first upper chamber has a limited pressure regulating range, when the gas amount entering from the third gas inlet is large and the gas pressure is high, the pressure regulating stability is limited.

[0003] Therefore, the utility model is provided. UTILITY MODEL CONTENT

[0004] The technical problem to be solved by the utility model is to overcome the defects of the prior art, and provide a variable pressure brake valve for automobile brake.

[0005] The utility model provides a variable pressure brake valve for automobile brake, including brake pressure regulating part and brake control part, be provided with upper chamber and lower chamber in brake pressure regulating part, install upper pressure regulating diaphragm in upper chamber, upper pressure regulating diaphragm fixed mounting is on valve stem, the top of upper pressure regulating diaphragm is provided with buffer plate in parallel, the bottom surface of buffer plate and the top surface of upper pressure regulating diaphragm are provided with upper pressure regulating spring, the outer side of the position of valve stem close to lower part is fixedly provided with sealing ring, the position of sealing ring corresponds with the position of second pressure regulating gas outlet in normal pressure state, fixedly provided with fixed seat body in lower chamber, the lower side telescopic connection of fixed seat body is provided with telescopic guide column, the lower end of telescopic guide column is fixedly provided with lower pressure regulating diaphragm, the outer side of telescopic guide column between lower pressure regulating diaphragm and fixed seat body is provided with lower pressure regulating spring, the side wall of lower chamber close to brake control part side is provided with first pressure regulating gas outlet, the lower side of first pressure regulating gas outlet is provided with pressure regulating gas inlet, brake control part is provided with control gas outlet and control gas inlet correspondingly, pressure regulating gas inlet and control gas outlet are communicated, first pressure regulating gas outlet, second pressure regulating gas outlet all with control gas inlet are communicated, and the communication channel is cast into shape, does not need external pipeline, and the air passage stability is good.

[0006] As a further scheme of the utility model: the upper chamber of brake pressure regulating part is provided with sealing maintenance cover in the corresponding upper position, the sealing maintenance cover is connected with brake pressure regulating part through fine thread, the sealing groove is provided with sealing ring in the sealing groove between the sealing maintenance cover and the combination surface of brake pressure regulating part, ensure the sealing property of sealing maintenance cover and brake pressure regulating part connection.

[0007] As a further scheme of the utility model: the inside top surface of sealing maintenance cover is fixedly provided with buffer bag, the lower part of buffer bag is spherical surface structure, buffer bag is hollow buffer material, the top surface of buffer bag contacts with buffer plate, realizes two-stage buffering in upper chamber through the cooperation of buffer bag and buffer plate.

[0008] As a further scheme of the utility model: the side of lower chamber of brake pressure regulating part is provided with pressure relief hole, the safety valve is installed in pressure relief hole, the bottom surface of upper chamber is provided with buffer pad, the valve stem is hollow structure, the buffer cavity is provided in valve stem, can absorb a part of gas, carries out certain pressure regulating buffering.

[0009] As a further scheme of the utility model: the outer side of the sealing ring is provided with a sealing sleeve, the sealing sleeve selects a soft sealing material, the outer side of the fixed seat body is provided with four fixing frames, the fixing frame is fixedly connected with the inner wall of the lower chamber, the fixing frame is arranged, the fixed seat body can be fixedly installed, and gas can be rapidly transmitted.

[0010] As a further scheme of the utility model: a buffer matching cavity is formed in the fixed seat body, the upper end of the telescopic guide column is slidably connected and installed in the buffer matching cavity, a buffer block is fixedly arranged on the top surface of the buffer matching cavity, and a buffer gasket is fixedly arranged on the bottom surface of the buffer matching cavity, so as to effectively buffer the limit position of the telescopic guide column during upward and downward movement.

[0011] After the above technical scheme is adopted, the utility model has the following beneficial effects compared with the prior art.

[0012] The brake pressure regulating part and the brake regulating part are integrally formed, an air passage is arranged inside, corresponding connection of air inlets and outlets of the two parts is realized, an outside connecting pipeline is not needed, the overall structure has good stability, two pressure regulating air outlets are arranged inside the brake pressure regulating part, and accurate pressure regulation can be realized according to the air quantity and air pressure of the air inlet.

[0013] The brake pressure regulating part is provided with an upper pressure regulating diaphragm, an upper pressure regulating spring and a buffer bag in the upper chamber, two-stage pressure regulation can be realized, a lower pressure regulating diaphragm is arranged in the lower chamber, and cooperative pressure regulation can also be realized, the pressure regulation range of the pressure change brake valve is effectively increased, a sealing maintenance cover is arranged above the brake pressure regulating part, and internal elements are convenient to maintain and replace.

[0014] The specific implementation of the utility model will be further described in detail in combination with the drawings. BRIEF DESCRIPTION OF DRAWINGS

[0015] The drawings are part of the application and serve to provide a further understanding of the utility model, the schematic embodiments of the utility model and the description thereof serve to explain the utility model, but do not constitute improper limitation on the utility model. Apparently, the drawings in the following description are only some embodiments, and other drawings can be obtained by those skilled in the art without creative labor. In the drawings:

[0016] Figure 1 It is a sectional view of the utility model;

[0017] Figure 2 It is a schematic view of the brake pressure regulating part of the utility model;

[0018] Figure 3 It is a local enlarged view of A of the utility model;

[0019] Figure 4 The lower pressure regulating diaphragm installation schematic view of the utility model;

[0020] Figure 5 The fixed frame arrangement schematic view of the utility model.

[0021] In the figure: 1, brake pressure regulating part; 2, brake control part; 3, sealing maintenance cover; 4, sealing groove; 5, sealing ring; 6, buffer bag; 7, buffer plate; 8, upper pressure regulating spring; 9, pressure relief hole; 10, safety valve; 11, pressure regulating air inlet; 12, control air outlet; 13, control air inlet; 14, first pressure regulating air outlet; 15, second pressure regulating air outlet; 16, lower chamber; 17, upper chamber; 18, lower pressure regulating diaphragm; 19, valve stem; 20, upper pressure regulating diaphragm; 21, buffer pad; 22, sealing ring; 23, sealing sleeve; 24, buffer cavity; 25, telescopic guide column; 26, lower pressure regulating spring; 27, buffer matching cavity; 28, fixed seat body; 29, buffer block; 30, buffer gasket; 31, fixed frame.

[0022] It should be noted that these drawings and textual descriptions are not intended to limit the concept range of the utility model in any way, but to illustrate the concept of the utility model to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments will be described clearly and completely below by combining the drawings in the embodiments of the utility model, and the following embodiments are used to illustrate the utility model but not to limit the scope of the utility model.

[0024] As Figures 1 to 5As shown, for the automobile brake pressure brake valve, brake pressure part 1 and brake control part 2, brake pressure part 1 is provided with upper chamber 17 and lower chamber 16, upper chamber 17 is provided with upper pressure regulating diaphragm 20, upper pressure regulating diaphragm 20 is fixedly installed on valve stem 19, upper pressure regulating diaphragm 20 is provided with buffer plate 7 above, upper pressure regulating spring 8 is provided between the bottom surface of buffer plate 7 and the top surface of upper pressure regulating diaphragm 20, sealing ring 22 is fixedly arranged outside the position close to the lower part of valve stem 19, the position of sealing ring 22 corresponds to the position of second pressure regulating gas outlet 15 in normal pressure state, fixed seat body 28 is fixedly arranged in lower chamber 16, telescopic guide column 25 is telescopically connected below fixed seat body 28, lower pressure regulating diaphragm 18 is fixedly arranged at the lower end of telescopic guide column 25, lower pressure regulating spring 26 is arranged outside telescopic guide column 25 between lower pressure regulating diaphragm 18 and fixed seat body 28, first pressure regulating gas outlet 14 is arranged on the side wall of lower chamber 16 close to brake control part 2, pressure regulating gas inlet 11 is arranged below first pressure regulating gas outlet 14, brake control part 2 is correspondingly provided with control gas outlet 12 and control gas inlet 13, pressure regulating gas inlet 11 and control gas outlet 12 are communicated, first pressure regulating gas outlet 14 and second pressure regulating gas outlet 15 are communicated with control gas inlet 13, and the communication channel is cast into shape without external pipeline, and the air ventilation stability is good.

[0025] Wherein, the upper chamber 17 of the brake pressure part 1 is provided with a sealing maintenance cover 3 corresponding to the upper position, the sealing maintenance cover 3 is connected with the brake pressure part 1 through fine thread, and the sealing groove 4 is arranged corresponding to the joint surface of the sealing maintenance cover 3 and the brake pressure part 1, and the sealing ring 5 is arranged in the sealing groove 4 to ensure the sealing of the connection between the sealing maintenance cover 3 and the brake pressure part 1.

[0026] The inside top surface of the sealing maintenance cover 3 is fixedly provided with a buffer bag 6, the lower part of the buffer bag 6 is a spherical surface structure, the buffer bag 6 is a hollow buffer material, and the buffer bag 6 contacts the top surface of the buffer plate 7 to realize two-stage buffering in the upper chamber 17 through the cooperation of the buffer bag 6 and the buffer plate 7.

[0027] The lower chamber 16 of the brake pressure part 1 is provided with a pressure relief hole 9, and a safety valve 10 is arranged in the pressure relief hole 9. The bottom surface of the upper chamber 17 is provided with a buffer pad 21, the valve stem 19 is a hollow structure, the valve stem 19 is provided with a buffer cavity 24, and a part of gas can be absorbed and accommodated to perform certain pressure regulating buffering.

[0028] The outer side of the sealing ring 22 is provided with a sealing sleeve 23, the sealing sleeve 23 is made of soft sealing material, the outer side of the fixed seat body 28 is provided with four fixed frames 31, and the fixed frames 31 are fixedly connected with the inner wall of the lower chamber 16, so that the fixed seat body 28 can be fixedly installed, and the gas can be quickly transmitted.

[0029] A buffer fitting cavity 27 is provided on the fixed seat body 28, and the upper end of the telescopic guide column 25 is slidingly connected and installed in the buffer fitting cavity 27. A buffer block 29 is fixedly provided on the top surface of the buffer fitting cavity 27, and a buffer gasket 30 is fixedly provided on the bottom surface of the buffer fitting cavity 27 for effectively buffering the extreme positions of the telescopic guide column 25 during the up and down movement.

[0030] The working principle of the utility model is as follows: the brake pressure regulating part 1 and the brake control part 2 of the present application are designed as an integrated structure with good structural stability; a multi-stage pressure regulating structure is provided in the brake pressure regulating part 1, which can be used for adjustment in different air pressure ranges, has good adaptability and high pressure regulation sensitivity;

[0031] Example 1: When the air intake volume of the pressure-regulating air inlet 11 is small and the air pressure is relatively low, the air passes through the gap between the fixing brackets 31 and directly enters the first pressure-regulating air outlet 14. Due to the small air volume, the movement range of the valve stem 19 and the lower pressure-regulating diaphragm 18 is small. Therefore, even with a small adjustment, a quick braking response can be achieved, thereby improving the braking sensitivity.

[0032] When the pressure regulating air inlet 11 is large in intake volume and the air pressure is relatively high, a part of the gas enters the first pressure regulating air outlet 14, and the high pressure pushes the valve stem 19 to move upward, and at the same time, pushes the lower pressure regulating diaphragm 18 to move downward. A buffer cavity 24 is provided on the valve stem 19, which can quickly reduce the pressure and absorb energy. During the upward movement of the valve stem 19, the sealing ring 22 is separated from the second pressure regulating air outlet 15, and the second pressure regulating air outlet 15 is in an open state. A part of the gas enters the second pressure regulating air outlet 15, and the gas from the first pressure regulating air outlet 14 and the second pressure regulating air outlet 15 merges and enters the regulating air inlet 13. During the upward movement of the valve stem 19, the upper pressure regulating diaphragm 20 is driven to move upward synchronously, and the upper pressure regulating spring 8 is compressed. The buffer plate 7 is acted upon by the upper pressure regulating spring 8 and tends to move upward, thereby applying external force to the buffer bag 6. The buffer bag 6 has a hollow structure, which can also further improve the pressure regulating range under high pressure state.

[0033] The utility model has a reasonable structural design. The brake pressure regulating part 1 and the brake control part 2 are an integrally formed structure. A ventilation channel is arranged inside to realize the corresponding connection of the air inlet and outlet of the two parts. No external connecting pipe is required. The overall structural stability is good. Two pressure regulating air outlets are arranged inside the brake pressure regulating part 1, and the pressure can be accurately adjusted according to the intake air volume and air pressure. The brake pressure regulating part 1 is provided with an upper pressure regulating diaphragm 20, an upper pressure regulating spring 8 and a buffer bag 6 in the upper chamber 17, which can realize two-stage pressure regulation. A lower pressure regulating diaphragm 18 is provided in the lower chamber 16, which can also be coordinated for pressure regulation, effectively increasing the pressure range of the variable pressure brake valve. A sealed inspection cover 3 is provided above the brake pressure regulating part 1, which is convenient for inspection and replacement of internal components.

[0034] The above merely describes preferred embodiments of the present application and is not intended to limit the present application in any form. Although the present application has been disclosed with preferred embodiments, it is not intended to limit the present application. Any skilled person in the art can make some changes or modifications to the above-mentioned technical content without departing from the technical solution of the present application, and equivalent embodiments with equivalent changes are equivalent. Any simple modification, equivalent change and modification of the above embodiments made according to the technical essence of the present application still belong to the scope of the present application.

Claims

1. A variable pressure brake valve for a vehicle brake, comprising a brake pressure regulating portion (1) and a brake pressure regulating portion (2), characterized in that, The brake pressure regulating part (1) is provided with an upper chamber (17) and a lower chamber (16), the upper chamber (17) is provided with an upper pressure regulating diaphragm (20), the upper pressure regulating diaphragm (20) is fixedly installed on a valve rod (19), the upper pressure regulating diaphragm (20) is provided with a buffer plate (7) in parallel above, the buffer plate (7) is provided with an upper pressure regulating spring (8) between the bottom surface and the top surface of the upper pressure regulating diaphragm (20), the valve rod (19) is provided with a sealing ring (22) outside the position close to the lower part, the position of the sealing ring (22) corresponds to the position of the second pressure regulating gas outlet (15) in normal pressure state, the lower chamber (16) is provided with a fixed seat body (28), the fixed seat body (28) is provided with a telescopic guide column (25) in telescopic connection below, the lower end of the telescopic guide column (25) is provided with a lower pressure regulating diaphragm (18), the lower pressure regulating diaphragm (18) is provided with a lower pressure regulating spring (26) outside the telescopic guide column (25) between the fixed seat body (28), the lower chamber (16) is provided with a first pressure regulating gas outlet (14) on the side wall close to the brake regulating part (2), the lower chamber (16) is provided with a pressure regulating gas inlet (11) below the first pressure regulating gas outlet (14), the brake regulating part (2) is provided with a regulating gas outlet (12) and a regulating gas inlet (13) correspondingly, the pressure regulating gas inlet (11) is communicated with the regulating gas outlet (12), the first pressure regulating gas outlet (14) and the second pressure regulating gas outlet (15) are communicated with the regulating gas inlet (13).

2. The variable pressure brake valve for automotive vehicles as claimed in claim 1 wherein, The upper chamber (17) of the brake pressure regulating part (1) is provided with a sealing maintenance cover (3) in the corresponding upper position, the sealing maintenance cover (3) is connected with the brake pressure regulating part (1) through fine thread connection, the sealing maintenance cover (3) is provided with a sealing groove (4) in the corresponding position at the joint surface with the brake pressure regulating part (1), and the sealing groove (4) is provided with a sealing ring (5).

3. The variable pressure brake valve for automotive vehicles as claimed in claim 2 wherein, The inside top surface of the sealing maintenance cover (3) is fixedly provided with a buffer bag (6), the lower part of the buffer bag (6) is a spherical surface structure, the buffer bag (6) is a hollow buffer material, and the buffer bag (6) is in contact with the top surface of the buffer plate (7).

4. The variable pressure brake valve for automotive vehicles as claimed in claim 3 wherein, The lower chamber (16) of the brake pressure regulating part (1) is provided with a pressure relief hole (9) in the side, the pressure relief hole (9) is provided with a safety valve (10), the bottom surface of the upper chamber (17) is provided with a buffer pad (21), the valve rod (19) is a hollow structure, and the valve rod (19) is provided with a buffer cavity (24).

5. The variable pressure brake valve for automotive vehicles as claimed in claim 4 wherein, The outer side of the sealing ring (22) is provided with a sealing sleeve (23), the sealing sleeve (23) is made of soft sealing material, the outer side of the fixed seat body (28) is provided with four fixed frames (31), and the fixed frames (31) are fixedly connected with the inner wall of the lower chamber (16).

6. The variable pressure brake valve for automotive vehicles as claimed in claim 5 wherein, The fixed seat body (28) is provided with a buffer matching cavity (27), the upper end of the telescopic guide column (25) is slidingly connected and installed in the buffer matching cavity (27), the top surface of the buffer matching cavity (27) is fixedly provided with a buffer block (29), and the bottom surface of the buffer matching cavity (27) is fixedly provided with a buffer gasket (30).

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