CN210502646U

CN210502646U - Hydraulic double-cavity brake boosting master cylinder

Info

Publication number: CN210502646U
Application number: CN201921267438.0U
Authority: CN
Inventors: 陈灵刚; 刘叶芝; 韩伟玉; 刘叶勇
Original assignee: Yuhuan Aoheng Machinery Co ltd
Current assignee: Yuhuan Aoheng Machinery Co ltd
Priority date: 2019-08-06
Filing date: 2019-08-06
Publication date: 2020-05-12
Anticipated expiration: 2029-08-06

Abstract

The utility model provides a hydraulic pressure two-chamber brake helping hand master cylinder belongs to mechanical technical field. It has solved the problem that current helping hand jar can't satisfy different environment user demands. This hydraulic pressure two-chamber braking helping hand master cylinder, cylinder body, piston and the shaft-like push rod portion that is connected with the piston still set up oil inlet and oil-out that all is linked together with one of them inner chamber on the cylinder body, the cylinder body outside is located department has still linked firmly the valve body between oil inlet and the oil-out, the valve body has the feed liquor end that is linked together with the oil inlet, the play liquid end that is linked together with the oil-out and can feed through the feed liquor end and go out the overflow passageway of liquid end, still be provided with overflow piece, spring holder and set up the spring between overflow piece and spring holder in the valve body, overflow piece can block under the spring action of spring overflow passageway, the spring holder can be in the valve body to the overflow piece direction is close to or keeps away from. The hydraulic double-cavity brake power-assisted main cylinder has the advantage of good applicability.

Description

Hydraulic double-cavity brake boosting master cylinder

Technical Field

The utility model belongs to the technical field of machinery, a hydraulic power cylinder is related to, especially, relate to a hydraulic pressure two-chamber brake power master cylinder.

Background

The existing hydraulic power cylinder generally comprises a cylinder body, a piston arranged in the cylinder body and a push rod of which the outer end is used for being connected with a vehicle pedal, wherein the piston divides the cylinder body into an oil inlet cavity and an oil return cavity, the cylinder body is provided with an oil inlet and an oil return opening which are respectively communicated with the oil inlet cavity and the oil return cavity, and the piston is also provided with an oil passage which can communicate the oil inlet cavity and the oil return cavity. During the use, push the push rod in to the cylinder body and block the oily passageway, for the oil feed chamber lasts the fuel feeding through external fuel feeding equipment, promote the piston through the assistance of oil pressure and remove, reduced the operation degree of difficulty. However, when the oil passage is continuously blocked, the oil pressure in the oil inlet chamber is continuously increased, which causes the external oil supply equipment to bear a great load, and further causes the service life of the external oil supply equipment to be shortened or even damaged.

Therefore, the applicant designs a hydraulic power cylinder with a protection structure, and applies Chinese patent (the application number is 201820208126.1; the publication number is CN207892921U), the hydraulic power cylinder comprises a cylinder body with an oil inlet and an oil return opening, a piston arranged in the cylinder body and a push rod penetrating through the cylinder body, an oil passage capable of communicating the oil inlet with the oil return opening is formed in the piston, the oil passage can be blocked when the push rod extends into the cylinder body, an oil drainage passage capable of communicating the oil inlet with the oil return opening is further formed in the piston and/or the push rod, a check valve is further connected in the oil drainage passage, and the oil drainage passage can be communicated when the pressure difference between the oil inlet and the oil return opening reaches a set value.

However, above-mentioned draining passageway and the check valve that sets up in draining passageway all by the cladding in the cylinder body, its pressure release pressure value just confirms after hydraulic cylinder leaves the factory, and unable change can't satisfy different service environment's user demand, and it is comparatively inconvenient to use.

SUMMERY OF THE UTILITY MODEL

The utility model aims at the above-mentioned problem that prior art exists, provide a hydraulic pressure two-chamber brake helping hand master cylinder, the technical problem that solve makes the use place of hydraulic pressure two-chamber brake helping hand master cylinder adaptation different pressure release requirements.

The purpose of the utility model can be realized by the following technical proposal:

the hydraulic double-cavity brake power-assisted main cylinder comprises a cylinder body, two pistons, two rod-shaped push rod parts and a communication channel, wherein the cylinder body is provided with two inner cavities arranged in parallel, the two pistons are respectively arranged in the two inner cavities, the two push rod parts are respectively connected with the two pistons and are in a rod shape, the side walls of the two inner cavities are respectively provided with a communication hole, the communication channel is also internally provided with a communication channel capable of communicating the two communication holes, an opening and closing structure capable of enabling the two communication holes to be communicated or blocked is arranged in the communication channel or the communication hole, the cylinder body is also provided with an oil inlet and an oil outlet which are respectively communicated with one of the inner cavities, the hydraulic double-cavity brake power-assisted main cylinder is characterized in that a valve body is fixedly connected between the oil inlet and the oil outlet and is provided with a liquid inlet end communicated with the, The overflow piece can block the overflow channel under the elastic action of the spring, and the spring seat can be in the valve body to the direction of the overflow piece is close to or is kept away from and can be positioned through a limiting piece after the spring seat moves.

The hydraulic double-cavity brake boosting main cylinder comprises two inner cavities which are arranged in parallel in a cylinder body, the structures of the two inner cavities are basically the same, pistons which divide the inner cavities into an oil inlet cavity and an oil outlet cavity are arranged in the two inner cavities, an oil inlet is communicated with the oil inlet cavity, an oil outlet is communicated with the oil outlet cavity, and one outward side of each piston is connected with a rod-shaped push rod part. The piston is internally provided with an oil passing channel which can communicate the oil inlet with the oil outlet, and the push rod part can block the oil passing channel when extending into the cylinder body, so that the oil inlet cavity and the oil outlet cavity are separated, pressure difference can be formed between the oil inlet cavity and the oil outlet cavity when oil is injected, and the piston and the push rod part are assisted to be pushed under the action of oil pressure to provide braking assistance. When the pressure in the two inner cavities is unbalanced, the communicating channel can be opened by controlling the opening and closing structure, so that the two inner cavities are communicated, and the pressure balance is realized.

When the pressure in the oil inlet cavity is too high, the oil pressure can act on the overflow piece, so that the oil pressure overcomes the elastic action of the spring and approaches to the spring seat, the overflow channel is opened, oil can flow into the valve body from the liquid inlet end and flows out through the overflow channel, the liquid outlet end and the oil outlet, the oil pressure is discharged, and external oil supply equipment cannot bear a great load. When the oil drainage demand is different when in actual use, the position of the spring seat is adjusted to change the elasticity of the spring, and then the size of the oil pressure action applied to the overflow piece to overcome the action force of the spring to open the overflow channel is changed, and the applicability is good.

In foretell hydraulic pressure two-chamber brake helping hand master cylinder, the structure of opening and close includes the steel ball screw, this steel ball screw including set up in steel ball, intercommunication spring and the end cap in the intercommunication hole, end cap and cylinder body threaded connection, the intercommunication spring set up in between end cap and the steel ball just the steel ball can the shutoff under the elastic force effect of intercommunication spring the intercommunication hole and part stretch into in the cylinder body, the piston to can promote when the oil-out direction removes the steel ball retraction is in the intercommunication hole. The specific shape of the steel ball can be designed into an ellipsoid shape according to the requirement, or the opening and closing structure can be adjusted into a common opening and closing structure such as an electromagnetic valve and the like which can be electrically or manually controlled to open and close according to the requirement.

As another kind of condition, in foretell hydraulic pressure two-chamber brake helping hand master cylinder, open and close the structure and establish the leather cup in the core outside including being cylindrical core and cover, the core wears to locate in the intercommunicating pore and the one end of core can stretch into in the inner chamber, the intercommunicating pore inner wall still has the protrusion and is annular convex shoulder, the core can drive under the effect of oil pressure the leather cup supports and leans on and block on the convex shoulder the intercommunicating pore, the outside of leather cup with the clearance has between the inner wall of intercommunicating pore.

In foretell hydraulic pressure two-chamber brake helping hand master cylinder, it all is cylindrical overflow chamber one and overflow chamber two to have in the valve body, overflow chamber one and two alternately settings in overflow chamber and both middle parts intercommunication, the one end in overflow chamber one with the feed liquor end is linked together, above-mentioned overflow spare, spring and spring holder all set up in the other end in overflow chamber one, the one end and the above-mentioned liquid end of overflow chamber two are linked together, and the other end seals through a end cap.

In foretell hydraulic pressure two-chamber brake helping hand master cylinder, be located in the valve body convex fender shoulder has on the lateral wall between overflow spare and the feed liquor end, the overflow spare has the conical surface towards the one end outside of keeping off the shoulder, and when the overflow spare to keep off the shoulder when being close to, the conical surface can with keep off the shoulder and support and lean on and form sealedly.

In foretell hydraulic pressure two-chamber brake helping hand master cylinder, the overflow piece is the column, and its front end outside has above-mentioned conical surface, the middle part of overflow piece has outside convex annular protruding edge, the rear end of overflow piece has and is the cylindrical support column, a spring pot head is established the support column outside and with protruding along the counterbalance leaning on, the other end of spring support by on the spring holder.

In the hydraulic double-cavity brake power-assisted main cylinder, the limiting part comprises a nut and a screw rod, the nut is fixed on the outer side of the valve body at the other end of the overflow cavity, and the inner end of the screw rod penetrates through the nut and extends into the overflow cavity to abut against the spring seat.

In the hydraulic dual-cavity brake power-assisted master cylinder, the valve body comprises a cylindrical sealing block arranged in the first overflow cavity, and the retaining shoulder is positioned on the inner side of the sealing block.

In the hydraulic double-cavity brake power-assisted main cylinder, the valve body and the cylinder body are of an integrated structure.

Compared with the prior art, the hydraulic double-cavity brake power-assisted main cylinder has the following advantages:

1. the valve body with the overflow part and other structures is arranged on the outer side of the cylinder body, so that the oil pressure in the oil inlet cavity in the cylinder body can overflow through the overflow channel at the overflow part when the oil pressure is too high, the oil inlet cavity and external equipment are prevented from bearing too high oil pressure, and the service life is ensured.

2. The valve body and the cylinder body are connected into a whole, so that the connection of an oil pipe is reduced, the structure is more compact, and the sealing performance is better.

3. According to the draining demand of difference, the position of accessible adjustment spring holder is realized, has satisfied different pressure release environment's user demand, and the suitability is good.

Drawings

Fig. 1 is a schematic sectional view of the hydraulic dual chamber brake assist master cylinder.

FIG. 2 is a schematic cross-sectional view of another perspective of the present hydraulic dual chamber brake assist master cylinder.

Fig. 3 is a schematic sectional view of the hydraulic dual chamber brake assist master cylinder at the valve body.

In the figure, 1, inner cavity; 2. a cylinder body; 3. a piston; 4. a push rod part; 5. a communicating hole; 6. A communication channel; 7. an opening and closing structure; 8. a valve body; 9. a liquid inlet end; 10. a liquid outlet end; 12. An overflow member; 13. a spring seat; 14. a limiting member; 15. a first overflow cavity; 16. and a second overflow cavity.

Detailed Description

The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

As shown in fig. 1 and 2, the hydraulic dual-cavity brake power-assisted main cylinder comprises a cylinder body 2 with two inner cavities 1 arranged in parallel, two pistons 3 respectively arranged in the two inner cavities 1, and two rod-shaped push rod parts 4 respectively connected with the two pistons 3, wherein the two pistons 3 respectively divide the two inner cavities 1 into an oil inlet cavity and an oil outlet cavity, and the cylinder body 2 is provided with an oil inlet communicated with the oil inlet cavity and an oil outlet communicated with the oil outlet cavity. An oil passing channel capable of communicating the oil inlet with the oil outlet is formed in the piston 3, and the oil passing channel can be blocked when the push rod part 4 extends into the cylinder body 2.

The intercommunicating pore 5 has all been seted up to the lateral wall of two inner chambers 1, still has the intercommunication passageway 6 that can communicate two intercommunicating pores 5 in the cylinder body 2, all is provided with in two intercommunicating pores 5 and enables the opening and closing structure 7 that is linked together or is blocked between the two. In this embodiment, the open/close structure 7 includes a steel ball screw, the steel ball screw includes a steel ball disposed in the communicating hole 5, a communicating spring and an end cap, the end cap is in threaded connection with the cylinder 2, the communicating spring is disposed between the end cap and the steel ball, the steel ball can block the communicating hole 5 and partially extend into the cylinder 2 under the elastic force of the communicating spring, and the piston 3 can push the steel ball to retract into the communicating hole 5 when moving towards the oil outlet direction. The specific shape of the steel ball can be designed into an ellipsoid shape according to the requirement, or the opening and closing structure 7 can be adjusted into a common opening and closing structure 7 such as an electromagnetic valve and the like which can be electrically or manually controlled to open and close according to the requirement.

The structures of the two inner cavities 1 are basically the same, and the further description is given by taking one inner cavity 1 as an example:

the cylinder body 2 is also provided with an oil inlet and an oil outlet which are communicated with one of the inner cavities 1, the position, between the oil inlet and the oil outlet, of the outer side of the cylinder body 2 is fixedly connected with a valve body 8, and the valve body 8 is provided with a liquid inlet end 9 communicated with the oil inlet, a liquid outlet end 10 communicated with the oil outlet and an overflow channel capable of communicating the liquid inlet end 9 with the liquid outlet end 10. The valve body 8 is further internally provided with an overflow piece 12, a spring seat 13 and a spring arranged between the overflow piece 12 and the spring seat 13, the overflow piece 12 can block an overflow channel under the elastic force action of the spring, and the spring seat 13 can be close to or far away from the overflow piece 12 in the valve body 8 and can be positioned through a limiting piece 14 after the spring seat 13 moves.

Specifically, a first cylindrical overflow cavity 15 and a second cylindrical overflow cavity 16 are arranged in the valve body 8, the first overflow cavity 15 and the second overflow cavity 16 are arranged in a crossed mode, the middle portions of the first overflow cavity 15 and the second overflow cavity 16 are communicated, one end of the first overflow cavity 15 is communicated with the liquid inlet end 9, the overflow piece 12, the spring and the spring seat 13 are arranged in the other end of the first overflow cavity 15, one end of the second overflow cavity 16 is communicated with the liquid outlet end 10, and the other end of the second overflow cavity is sealed through a plug. A cylindrical sealing block is further arranged in the first overflow cavity 15 in the valve body 8, a convex blocking shoulder is arranged on the inner side of the sealing block, a conical surface is arranged on the outer side of one end, facing the blocking shoulder, of the overflow piece 12, and when the overflow piece 12 is close to the blocking shoulder, the conical surface can be abutted against the blocking shoulder to form sealing.

The overflow piece 12 is columnar, the outer side of the front end of the overflow piece is provided with the conical surface, the middle of the overflow piece 12 is provided with an outward convex annular convex edge, the rear end of the overflow piece 12 is provided with a cylindrical supporting column, one end of a spring is sleeved on the outer side of the supporting column and abuts against the convex edge, and the other end of the spring abuts against a spring seat 13. In the embodiment, the valve body 8 and the cylinder body 2 are of an integrated structure; the limiting piece 14 comprises a nut and a screw rod, the nut is fixed on the outer side of the valve body 8 at the other end of the overflow cavity I15, and the inner end of the screw rod penetrates through the nut and extends into the overflow cavity I15 to abut against the spring seat 13. Of course, the limiting member 14 can also be a screw threaded on the sidewall of the valve body 8, and the inner end of the screw can press the spring seat 13 against the inner wall of the valve body 8.

When the pressure in the oil inlet cavity is too high, the oil pressure can act on the overflow piece 12, so that the oil pressure overcomes the elastic action of the spring and approaches to the spring seat 13, the overflow channel is opened, oil can flow into the valve body 8 from the liquid inlet end 9 and flows out through the overflow channel, the liquid outlet end 10 and the oil outlet, the oil pressure is discharged, and external oil supply equipment cannot bear a great load. When the oil drainage requirement is different during the actual use, inwards screw in the screw rod or outwards screw out the screw rod can adjust the position of spring holder 13 in order to change the elasticity of spring, and then change and apply on overflow piece 12 so that it overcomes the size of the oil pressure effect that the spring effort opened the overflow passageway, and the suitability is good.

Besides the above technical scheme, the opening and closing structure can also comprise a cylindrical core and an annular leather cup which is sleeved outside the core, the core is arranged in the communicating hole 5 in a penetrating way, the inner end surface of the core is spherical and can extend into the inner cavity 1, the middle part of the core is also provided with a concave annular limiting groove, and the leather cup is arranged in the limiting groove. The inner wall of the communicating hole is also provided with a convex shoulder which is convex and annular, the core can drive the leather cup to abut against the convex shoulder under the action of oil pressure to form sealing and block the communicating hole, and a gap is formed between the outer side of the leather cup and the inner wall of the communicating hole 5.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Claims

1. The hydraulic double-cavity brake power-assisted main cylinder comprises a cylinder body (2) with two inner cavities (1) which are arranged in parallel, two pistons (3) which are respectively arranged in the two inner cavities (1), and two rod-shaped push rod parts (4) which are respectively connected with the two pistons (3), wherein the side walls of the two inner cavities (1) are respectively provided with a communicating hole (5), the cylinder body (2) is also internally provided with a communicating channel (6) which can communicate the two communicating holes (5), an opening and closing structure (7) which can enable the two communicating holes (5) to be communicated or blocked is arranged in the communicating channel (6) or the communicating hole (5), the cylinder body (2) is also provided with an oil inlet and an oil outlet which are communicated with one of the inner cavities (1), and the hydraulic double-cavity brake power-assisted main cylinder is characterized in that a valve body (8) is fixedly connected at the position, which is positioned outside, the overflow valve is characterized in that the valve body (8) is provided with a liquid inlet end (9) communicated with the oil inlet, a liquid outlet end (10) communicated with the oil outlet and an overflow channel capable of communicating the liquid inlet end (9) with the liquid outlet end (10), an overflow piece (12), a spring seat (13) and a spring arranged between the overflow piece (12) and the spring seat (13) are further arranged in the valve body (8), the overflow piece (12) can block the overflow channel under the elastic action of the spring, and the spring seat (13) can be close to or far away from the direction of the overflow piece (12) in the valve body (8) and can be positioned through a limiting piece (14) after the spring seat (13) moves.

2. The hydraulic dual-cavity brake power-assisted master cylinder as claimed in claim 1, wherein the opening and closing structure (7) comprises a steel ball screw, the steel ball screw comprises a steel ball arranged in the communicating hole (5), a communicating spring and an end cap, the end cap is in threaded connection with the cylinder body (2), the communicating spring is arranged between the end cap and the steel ball, the steel ball can block the communicating hole (5) under the elastic force action of the communicating spring and partially extends into the cylinder body (2), and the piston (3) can push the steel ball to retract into the communicating hole (5) when moving towards the oil outlet direction.

3. The hydraulic dual-cavity brake power-assisted main cylinder of claim 1, wherein the opening and closing structure (7) comprises a columnar core and a leather cup sleeved outside the core, the core is arranged in the communicating hole (5) in a penetrating manner, one end of the core can extend into the inner cavity (1), a protruding annular shoulder is further arranged on the inner wall of the communicating hole (5), the core can drive the leather cup to abut against the shoulder and block the communicating hole (5) under the action of oil pressure, and a gap is reserved between the outer side of the leather cup and the inner wall of the communicating hole (5).

4. The hydraulic dual-chamber brake power-assisted main cylinder according to claim 1, 2 or 3, wherein a first overflow chamber (15) and a second overflow chamber (16) which are both columnar are arranged in the valve body (8), the first overflow chamber (15) and the second overflow chamber (16) are arranged in a crossed manner, the middle parts of the first overflow chamber (15) and the second overflow chamber (16) are communicated, one end of the first overflow chamber (15) is communicated with the liquid inlet end (9), the overflow piece (12), the spring and the spring seat (13) are arranged in the other end of the first overflow chamber (15), one end of the second overflow chamber (16) is communicated with the liquid outlet end (10), and the other end of the second overflow chamber is sealed by a plug.

5. The hydraulic dual-chamber brake-assist master cylinder according to claim 4, wherein a convex shoulder is provided on the side wall of the valve body (8) between the overflow member (12) and the inlet end (9), the overflow member (12) has a tapered surface toward the outside of one end of the shoulder, and when the overflow member (12) approaches the shoulder, the tapered surface can abut against the shoulder and form a seal.

6. The hydraulic dual-chamber brake-assist master cylinder according to claim 5, wherein the overflow member (12) is cylindrical, the outer side of the front end of the overflow member is provided with the conical surface, the middle part of the overflow member (12) is provided with an annular convex edge protruding outwards, the rear end of the overflow member (12) is provided with a cylindrical supporting column, one end of the spring is sleeved on the outer side of the supporting column and abuts against the convex edge, and the other end of the spring abuts against the spring seat (13).

7. The hydraulic dual-chamber brake-assist master cylinder according to claim 4, wherein the limiting member (14) comprises a nut and a screw rod, the nut is fixed on the outer side of the valve body (8) at the other end of the first overflow chamber (15), and the inner end of the screw rod penetrates through the nut and extends into the first overflow chamber (15) to abut against the spring seat (13).

8. The hydraulic dual-chamber brake booster master cylinder according to claim 5, wherein the valve body (8) includes a cylindrical sealing block disposed in the first overflow chamber (15), and the shoulder is located inside the sealing block.

9. The hydraulic dual-chamber brake booster master cylinder according to claim 1, 2 or 3, characterized in that the valve body (8) and the cylinder body (2) are of one-piece construction.