CN219282117U

CN219282117U - Amplifying valve for hydraulic braking of vehicle

Info

Publication number: CN219282117U
Application number: CN202223287761.9U
Authority: CN
Inventors: 郭向阳
Original assignee: Individual
Current assignee: Individual
Priority date: 2022-12-08
Filing date: 2022-12-08
Publication date: 2023-06-30
Anticipated expiration: 2032-12-08

Abstract

The utility model relates to an amplifying valve for hydraulic braking of a vehicle, which is arranged between an oil outlet of a foot brake valve and a brake pipeline of a hydraulic braking system and comprises an upper cover, an upper valve seat, a lower valve seat and a lower cover which are sequentially and fixedly connected, wherein an assembly cavity is arranged in the upper valve seat, a second oil cavity is arranged in the lower valve seat, a horn mouth is arranged in the second oil cavity, a first piston and a first spring are arranged in the assembly cavity, a first oil cavity is arranged between the bottom of the first piston and the upper cover, the top of the first piston extends into the second oil cavity, an oil duct is arranged in the first piston and is respectively communicated with the first oil cavity and the second oil cavity, a second piston for blocking the horn mouth is fixed at the top of the first piston, and a one-way valve for blocking an outlet of the oil duct is arranged in the second piston. The hydraulic oil pressure of the foot brake valve can be amplified by a plurality of times and supplied to the brake pipeline through the utility model, thereby reducing the pressure requirement of the foot brake valve and the processing precision requirement thereof and reducing the cost of the whole vehicle.

Description

Amplifying valve for hydraulic braking of vehicle

Technical Field

The utility model relates to the technical field of hydraulic valves, in particular to an amplifying valve for hydraulic braking of a vehicle.

Background

In a vehicle braking system, the hydraulic braking is stable and smooth due to the fact that the hydraulic braking has braking pressure, the operation of a brake pedal is light, the operation is reliable, the brake system cannot be frozen due to moisture in winter, and therefore most of vehicles working under complex working conditions or heavy-load working conditions adopt the hydraulic braking system. Most of the existing hydraulic braking systems are composed of parts such as a liquid filling valve, a foot braking valve, an energy accumulator, a hydraulic pipeline and the like, and have the defects of high cost and complex structure. Because the brake pressure is up to more than 10MPa, under the condition that a special brake pump is not added, most hydraulic brake systems use a liquid filling valve to preferentially shunt hydraulic oil from a main pump to the brake systems, so that the internal leakage of the foot brake valve is required to be small, the brake systems can keep sufficient brake pressure when not working, otherwise, the operation of a large pump is influenced when the brake pressure is reduced, the manufacturing precision of the foot brake valve is required to be high, the internal leakage is required to be small, and the cost is high.

Disclosure of Invention

The utility model provides an amplifying valve for hydraulic braking of a vehicle, which is arranged at a liquid outlet of a foot brake valve, so that the problems of complex structure, large occupied space, insufficient supply pressure of the foot brake valve, high processing precision requirement and high cost in the existing hydraulic braking system are solved by utilizing the existing low-cost low-pressure foot brake valve and the amplifying valve.

The utility model adopts the following technical scheme:

the utility model provides an amplifying valve for vehicle hydraulic braking installs between hydraulic braking system's foot brake valve oil-out and brake pipeline, including upper cover, upper valve seat, lower disk seat and the lower cover of fixed connection in proper order, be equipped with the assembly chamber in the upper valve seat, be equipped with the second oil pocket in the lower disk seat, second oil pocket is close to upper valve seat one end and is equipped with a horn mouth, be equipped with first piston and the first spring on the first piston of cover in the assembly chamber, the bottom of first piston with be equipped with first oil pocket between the upper cover, the top of first piston extends to in the second oil pocket, be equipped with the oil duct in the first piston, the oil duct both ends communicate first oil pocket and second oil pocket respectively, the top of first piston still fixedly connected with one-way valve that is used for blocking up the export of oil duct is equipped with in the second piston, the upper cover has seted up first oil inlet, the lower cover has seted up first oil outlet, first oil inlet communicates with foot brake valve and first oil-out respectively, first oil pocket and brake pipeline communicate with second oil pocket respectively.

Further, the bottom of first piston is T type bottom, first piston bottom lateral wall with the inside wall in assembly chamber closely laminates, the inboard that the assembly chamber is close to lower disk seat one end is equipped with first spring holder, the both ends of first spring are held between T type bottom and first spring holder respectively.

Further, a first sealing groove is formed in the outer side wall of the T-shaped bottom and the inner side wall of the first spring seat, and a first sealing ring is arranged in the first sealing groove.

Further, a side flow port is formed in the side wall of the top of the first piston, and the side flow port is communicated with the oil duct and the horn mouth respectively.

Further, at least one second sealing groove is formed in the outer side wall of the second piston, and a second sealing ring is arranged in the second sealing groove.

Further, the one-way valve comprises a valve sleeve fixedly arranged on the second piston, a valve cavity communicated with the second oil cavity is arranged in the valve sleeve, a second oil inlet is formed in one side of the valve sleeve facing the oil duct, the second oil inlet is respectively communicated with the oil duct and the valve cavity, and the valve cavity is internally assembled with a valve core and a second spring for elastically supporting the second oil inlet.

Further, the outer side wall of the valve core is tightly attached to the valve cavity, a valve core oil cavity communicated with the valve cavity is formed in the valve core, a top boss is arranged on one side, facing the second oil inlet, of the valve core, a plug head for plugging the second oil inlet is arranged on the top boss, and a drainage port for communicating the valve core oil cavity is formed in the side wall of the top boss.

Further, the plug is anchor-shaped, and a rectangular sealing ring is embedded in the top surface of the top boss.

Further, an inner clamping ring is fixedly arranged at the opening of the valve cavity, and two ends of the second spring are respectively propped against the valve core and the inner clamping ring.

Further, a third sealing ring is arranged between the upper cover and the upper valve seat, a fourth sealing ring is arranged between the lower cover and the lower valve seat, and a fifth sealing ring is arranged between the upper valve seat and the lower valve seat.

As can be seen from the above description of the structure of the present utility model, compared with the prior art, the present utility model has the following advantages:

1. the amplifying valve is arranged between the oil outlet of the foot brake valve and the brake pipeline of the hydraulic brake system, the first oil cavity is communicated with the oil outlet of the foot brake valve, the second oil cavity is communicated with the brake pipeline, and when the brake is operated, the pressure of hydraulic oil in the second oil cavity and the subsequent brake pipeline can reach a plurality of times of the pressure of the hydraulic oil in the first oil cavity and the oil outlet of the foot brake valve through the linkage of the first oil cavity, the second oil cavity, the first piston and the second piston in the amplifying valve, namely, the pressure of the hydraulic oil of the foot brake valve is amplified by a plurality of times through the amplifying valve and is supplied to the brake pipeline, so that the pressure requirement of the foot brake valve and the processing precision requirement of the foot brake valve are reduced.

2. The sealing structure of the one-way valve adopts a special structure, the rectangular sealing ring has low requirements on the cleanliness of oil, the plug adopts an anchor-shaped structure, the rectangular sealing ring is hooked by the anchor-shaped plug, the rectangular sealing ring can be effectively prevented from running, and the rectangular sealing ring is not extruded, damaged or flushed away when the rectangular sealing ring moves repeatedly under the high-pressure environment of hydraulic oil, so that the sealing effect and the current limiting effect of the one-way valve are ensured.

Drawings

FIG. 1 is a schematic diagram of the structure of the present utility model.

FIG. 2 is a schematic diagram of the structure of the check valve of the present utility model.

Wherein, the reference numerals in the figures are as follows: an upper cover 10, a first oil inlet 11; the upper valve seat 20, the assembly cavity 21, the first piston 22, the first spring 23, the T-shaped bottom 24, the first spring seat 25, the oil duct 26, the side flow port 27 and the first oil cavity 28; a lower valve seat 30, a second piston 31, a second oil chamber 32, a bell mouth 321; a lower cover 40, a first oil outlet 41; a first seal ring 51, a second seal ring 52, a third seal ring 53, a fourth seal ring 54, a fifth seal ring 55; the valve comprises a check valve 60, a valve sleeve 61, a valve cavity 62, a second oil inlet 63, a valve core 64, a top boss 641, a plug 642, a second spring 65, an inner clamping ring 66, a valve core oil cavity 67, a drainage port 68 and a rectangular sealing ring 69.

Detailed Description

The following describes the implementation of the embodiment of the present utility model with reference to the drawings.

Referring to fig. 1, an amplifying valve for hydraulic braking of a vehicle is installed between an oil outlet of a foot brake valve of a hydraulic braking system and a brake pipe. The amplifying valve comprises an upper cover 10, an upper valve seat 20, a lower valve seat 30 and a lower cover 40 which are fixedly connected in sequence. The upper cover 10, the upper valve seat 20, the lower valve seat 30 and the lower cover 40 are fixedly locked and attached through bolts. A third sealing ring 53 is arranged between the upper cover 10 and the upper valve seat 20, and the third sealing ring 53 is embedded into the connecting surface of the upper valve seat 20 in an embedding manner. A fourth sealing ring 54 is arranged between the lower cover 40 and the lower valve seat 30, and the fourth sealing ring 54 is embedded into the connecting surface of the lower valve seat 30 in an embedding manner. A fifth sealing ring 55 is arranged between the upper valve seat 20 and the lower valve seat 30, and the fifth sealing ring 55 is embedded into the connecting surface of the lower valve seat 30 in an embedding manner.

Referring to fig. 1, an assembly chamber 21 is provided in the upper valve seat 20, a second oil chamber 32 is provided in the lower valve seat 30, and a flare 321 is provided at one end of the second oil chamber 32 adjacent to the upper valve seat 20. The first piston 22 and the first spring 23 sleeved on the first piston 22 are arranged in the assembly cavity 21. More specifically, the bottom of the first piston 22 is a T-shaped bottom 24, the outer side wall of the T-shaped bottom 24 of the first piston 22 is tightly attached to the inner side wall of the assembly cavity 21, a first spring seat 25 is arranged on the inner side of one end of the assembly cavity 21, which is close to the lower valve seat 30, and two ends of the first spring 23 are respectively propped between the T-shaped bottom 24 and the first spring seat 25. The outer side wall of the T-shaped bottom 24 and the inner side wall of the first spring seat 25 are both provided with a first sealing groove (not labeled in the figure), and a first sealing ring 51 is arranged in the first sealing groove.

Referring to fig. 1, a first oil cavity 28 is arranged between the bottom of the first piston 22 and the upper cover 10, the top of the first piston 22 extends into the second oil cavity 32, an oil duct 26 is arranged in the first piston 22, two ends of the oil duct 26 are respectively communicated with the first oil cavity 28 and the second oil cavity 32, a second piston 31 for blocking a bell mouth 321 is fixedly connected to the top of the first piston 22, and a one-way valve 60 for blocking an outlet of the oil duct 26 is arranged in the second piston 31. The cross-sectional area of second piston 31 is smaller than the cross-sectional area of T-shaped bottom 24 of first piston 22, i.e., the cross-section of first oil chamber 28 is larger than the cross-section of second oil chamber 32. The top side wall of the first piston 22 is provided with a side flow port 27, and the side flow port 27 is respectively communicated with the oil duct 26 and the bell mouth 321. The outer side wall of the second piston 31 is provided with at least one second sealing groove (not shown in the figure), and in this embodiment, two second sealing grooves are preferred, and second sealing rings 52 are arranged in the second sealing grooves. The upper cover 10 is provided with a first oil inlet 11, the lower cover 40 is provided with a first oil outlet 41, the first oil inlet 11 is respectively communicated with the foot brake valve oil outlet and the first oil cavity 28, and the first oil outlet 41 is respectively communicated with the second oil cavity 32 and the brake pipeline.

Referring to fig. 1 and 2, the check valve 60 includes a valve housing 61 fixedly mounted on the second piston 31, a valve cavity 62 communicating with the second oil cavity 32 is disposed in the valve housing 61, a second oil inlet 63 is disposed on a side of the valve housing 61 facing the oil duct 26, the second oil inlet 63 is respectively communicating with the oil duct 26 and the valve cavity 62, and the valve cavity 62 is assembled in a valve core 64 and a second spring 65 for elastically supporting the second oil inlet 63. An inner clamping ring 66 is fixedly arranged at the opening of the valve cavity 62, and two ends of the second spring 65 are respectively propped against the valve core 64 and the inner clamping ring 66. The outer side wall of the valve core 64 is tightly attached to the valve cavity 62, a valve core oil cavity 67 communicated with the valve cavity 62 is formed in the valve core 64, a top boss 641 is arranged on one side of the valve core 64 facing the second oil inlet 63, a plug head 642 for plugging the second oil inlet 63 is arranged on the top boss 641, and a drainage port 68 for communicating the valve core oil cavity 67 is formed in the side wall of the top boss 641. The plug 642 is anchor-shaped, and the top surface of the top boss 641 is embedded with a rectangular sealing ring 69, so that the rectangular sealing ring 69 is hooked by the anchor-shaped plug 642, the rectangular sealing ring 69 can be effectively prevented from running, and the sealing effect is improved.

Referring to fig. 1 and 2, when the hydraulic brake system of the vehicle brakes, the brake pedal is depressed, the oil outlet of the foot brake valve flows out of the hydraulic oil with pressure, and the hydraulic oil flows from the first oil inlet 11 of the upper cover 10 into the first oil chamber 28 and into the oil passage 26 of the first piston 22. The hydraulic oil in the oil passage 26 is subdivided into two paths, one path flows through the bell mouth 321 from the side flow port 27 of the first piston 22, and flows into the second oil chamber 32 through the gap between the second piston 31 and the bell mouth 321, and the hydraulic oil in the second oil chamber 32 flows into the brake pipe through the first oil outlet 41 of the lower cover 40, so that the brake pipe is filled with the hydraulic oil. When the brake pipe and other brake devices are full of oil, the pressure of the hydraulic oil gradually rises, the other path of hydraulic oil in the oil duct 26 overcomes the thrust of the second spring 65, the plug 642 of the one-way valve 60 is jacked up from the second oil inlet 63, flows into the valve core oil cavity 67 through the drainage port 68 on the valve core 64 of the one-way valve 60, and flows into the second oil cavity 32 from the valve core oil cavity 67. As the pressure of the hydraulic oil continues to rise, the hydraulic oil in the first oil chamber 28 overcomes the thrust of the first spring 23, and the hydraulic oil in the first oil chamber 28 pushes the first piston 22 towards the lower valve seat 30, so as to drive the second piston 31 to push towards the flare 321 of the second oil chamber 32, at this time, the gap between the second piston 31 and the flare 321 is gradually closed, and the pressure of the hydraulic oil in the second oil chamber 32 is gradually increased. When the hydraulic oil pressure of the second oil chamber 32 exceeds the hydraulic oil pressure of the first oil chamber 28, the valve core 64 of the check valve 60 is pressed against the inner bottom of the valve sleeve 61 by the hydraulic oil of the second oil chamber 32, and the plug 642 is made to block the second oil inlet 63, at this time, the second oil chamber 32 and the subsequent brake pipe and brake device are completely closed, because the area of the T-shaped bottom 24 of the first oil chamber 22 is larger than the area of the second piston 31, the thrust of the hydraulic oil of the first oil chamber 28 to the first piston 22 is larger than the thrust of the hydraulic oil of the second oil chamber 32 to the second piston 31, the first piston 22 drives the second piston 31 to continue pushing, the pressure of the second oil chamber 32 is gradually increased again until the thrust of the hydraulic oil of the first oil chamber 28 to the first piston 22 is equal to the thrust of the hydraulic oil of the second oil chamber 32 to the second piston 31, at this time, the hydraulic oil pressure of the second oil chamber 32 is the highest, the pressure of the T-shaped bottom 24 is several times that of the hydraulic oil in the first oil chamber 28, and the brake pipe and the brake device obtain enough brake pressure to completely brake the vehicle.

The foregoing is merely illustrative of specific embodiments of the present utility model, but the design concept of the present utility model is not limited thereto, and any insubstantial modification of the present utility model by using the design concept shall fall within the scope of the present utility model.

Claims

1. An amplifying valve for hydraulic braking of a vehicle, which is arranged between an oil outlet of a foot brake valve and a brake pipeline of a hydraulic braking system, and is characterized in that: including upper cover, upper valve seat, lower disk seat and the lower cover of fixed connection in proper order, be equipped with the assembly chamber in the upper valve seat, be equipped with the second oil pocket in the lower disk seat, second oil pocket is close to upper valve seat one end and is equipped with a horn mouth, be equipped with first piston and the first spring of cover on locating first piston in the assembly chamber, the bottom of first piston with be equipped with first oil pocket between the upper cover, the top of first piston extends to in the second oil pocket, be equipped with the oil duct in the first piston, oil duct both ends communicate first oil pocket and second oil pocket respectively, the top of first piston still fixedly connected with is used for blockking up the second piston of horn mouth is equipped with one-way valve that is used for blocking up the export of oil duct in the second piston, first oil inlet has been seted up to the upper cover, first oil inlet communicates with foot brake valve oil-out and first oil pocket respectively, first oil-out communicates with second oil pocket and brake pipeline respectively.

2. An amplifying valve for hydraulic braking of a vehicle according to claim 1, wherein: the bottom of first piston is T type bottom, first piston bottom lateral wall with the inside wall in assembly chamber closely laminates, the inboard that the assembly chamber is close to disk seat one end down is equipped with first spring holder, the both ends of first spring are held in T type bottom and first spring holder respectively.

3. An amplifying valve for hydraulic braking of a vehicle according to claim 2, wherein: the T-shaped bottom outer side wall and the inner side wall of the first spring seat are respectively provided with a first sealing groove, and a first sealing ring is arranged in the first sealing groove.

4. An amplifying valve for hydraulic braking of a vehicle according to claim 1, wherein: the side flow port is formed in the side wall of the top of the first piston, and the side flow port is communicated with the oil duct and the horn mouth respectively.

5. An amplifying valve for hydraulic braking of a vehicle according to claim 1, wherein: the outer side wall of the second piston is provided with at least one second sealing groove, and a second sealing ring is arranged in the second sealing groove.

6. An amplifying valve for hydraulic braking of a vehicle according to claim 1, wherein: the check valve comprises a valve sleeve fixedly arranged on the second piston, a valve cavity communicated with the second oil cavity is arranged in the valve sleeve, a second oil inlet is formed in one side of the valve sleeve facing the oil duct, the second oil inlet is respectively communicated with the oil duct and the valve cavity, and the valve cavity is internally assembled with a valve core and a second spring for elastically supporting the second oil inlet.

7. An amplifying valve for hydraulic braking of a vehicle according to claim 6, wherein: the outer side wall of the valve core is tightly attached to the valve cavity, a valve core oil cavity communicated with the valve cavity is formed in the valve core, a top boss is arranged on one side of the valve core, facing the second oil inlet, of the valve core, a plug head used for plugging the second oil inlet is arranged on the top boss, and a drainage port used for communicating the valve core oil cavity is formed in the side wall of the top boss.

8. An amplifying valve for hydraulic braking of a vehicle according to claim 7, wherein: the plug is anchor-shaped, and a rectangular sealing ring is embedded in the top surface of the top boss.

9. An amplifying valve for hydraulic braking of a vehicle according to claim 6, wherein: an inner clamping ring is fixedly arranged at the opening of the valve cavity, and two ends of the second spring are respectively propped against the valve core and the inner clamping ring.

10. An amplifying valve for hydraulic braking of a vehicle according to claim 1, wherein: the upper cover is provided with a first sealing ring, the lower cover is provided with a second sealing ring, the upper cover is provided with a third sealing ring, the lower cover is provided with a fourth sealing ring, and the upper valve seat is provided with a fifth sealing ring.