CN212564160U

CN212564160U - Booster of hydraulic brake protection device

Info

Publication number: CN212564160U
Application number: CN202021397021.9U
Authority: CN
Inventors: 陈灵刚; 刘叶芝; 刘叶勇; 韩伟玉
Original assignee: Yuhuan Aoheng Machinery Co ltd
Current assignee: Yuhuan Aoheng Machinery Co ltd
Priority date: 2020-07-15
Filing date: 2020-07-15
Publication date: 2021-02-19
Anticipated expiration: 2030-07-15

Abstract

The utility model provides a hydraulic braking protection device booster belongs to mechanical technical field. It has solved the not high problem of current hydraulic pressure helping hand jar work efficiency. The booster of the hydraulic brake protection device comprises a cylinder body, a piston, a return spring and a pushing piece, wherein the inner end of the pushing piece extends into the cylinder body, a columnar inner cavity, an oil inlet hole communicated with the oil inlet cavity and the inner cavity and an oil return hole communicated with the inner cavity and the oil return cavity are formed in the piston, the piston can move and block the oil inlet under the elastic force of the return spring, the pushing piece can extend into the inner cavity and abut against the piston and block the oil inlet hole when moving towards the cylinder body, the return spring is further arranged in the inner cavity, two ends of the return spring respectively act on the piston and the pushing piece, and the pushing piece moves outwards under the elastic force of the return spring and enables the oil inlet hole to be communicated to the inner cavity. The booster of the hydraulic braking protection device has the advantage of high working efficiency.

Description

Booster of hydraulic brake protection device

Technical Field

The utility model belongs to the technical field of machinery, a hydraulic braking protection device booster is related to.

Background

The structure of the 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, an oil return cavity and an oil outlet cavity, and the cylinder body is provided with an oil inlet, an oil return opening and an oil outlet which are respectively communicated with the oil inlet cavity, the oil return cavity and the oil outlet cavity. The piston is also provided with an oil passage which can communicate the oil inlet cavity with the oil return cavity. During the use, push the push rod and block the oil passageway in to the cylinder body, for the continuous oil feeding of oil feed chamber through external fuel feeding equipment, promote the piston through the assistance of oil pressure and remove, provide the helping hand for the piston promotes.

For example, the applicant designs a hydraulic cylinder and applied for chinese patent (application No. 201711263536.2; publication No. CN107830081A), the hydraulic cylinder includes a cylinder body having a liquid inlet and a liquid return port, a piston disposed in the cylinder body, and a rod-shaped pushing member, the liquid inlet and the liquid return port can communicate with each other through a liquid passage opened on the piston, the piston has a columnar liquid passing cavity, the liquid passing channel includes a liquid inlet channel opened on a side wall of the liquid passing cavity and capable of communicating the liquid passing cavity with the liquid inlet, an inner end of the pushing member has a liquid passing portion extending into the liquid passing cavity, the liquid passing portion can axially translate in the liquid passing cavity, and when the liquid passing portion is at different positions, a side portion of the liquid passing portion can partially block the liquid inlet channel or not block the liquid inlet channel to different degrees. When the hydraulic power-assisted cylinder is used, the pushing piece is pushed into the cylinder body, the liquid inlet channel is partially blocked, the liquid inlet speed is higher than the liquid outlet speed, and the oil which is discharged more can generate boosting force at the oil inlet cavity to assist the pushing of the piston.

However, under the same condition of external oil supply equipment, when the hydraulic power cylinder is used, the oil pressure increase speed of the oil inlet cavity is slightly slow, that is, the working efficiency is relatively low, so that the use requirements of partial equipment can be met, but the use requirements of the equipment with higher working efficiency requirements cannot be met.

SUMMERY OF THE UTILITY MODEL

The utility model aims at the above-mentioned problem that prior art exists, provide a hydraulic braking protection device booster, solved the not high problem of current hydraulic power cylinder work efficiency.

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

a booster of a hydraulic brake protection device comprises a cylinder body with an oil inlet and an oil return port, a piston arranged in the cylinder body, a return spring and a pushing piece of which the inner end extends into the cylinder body, the piston separates an oil inlet cavity which can be communicated with the oil inlet and an oil return cavity which is communicated with the oil return port in the cylinder body, the piston is internally provided with a columnar inner cavity, an oil inlet hole communicated with the oil inlet cavity and the inner cavity, and an oil return hole communicated with the inner cavity and the oil return cavity, it is characterized in that the piston can move under the action of the elastic force of the return spring and block the oil inlet, the pushing piece can extend into the inner cavity and abut against the piston and block the oil inlet hole when moving towards the cylinder body, a return spring is also arranged in the inner cavity, two ends of the return spring respectively act on the piston and the pushing piece, the pushing piece moves outwards under the action of the elastic force of the return spring and enables the oil inlet hole to be communicated with the inner cavity.

When the booster of the hydraulic braking protection device is used, if an operator does not push the pushing piece, the piston moves to the initial position under the elastic force action of the return spring and blocks the oil inlet, and oil output by external oil supply equipment is accumulated at the oil inlet and cannot enter the cylinder body. When an operator pushes the pushing piece inwards, the pushing piece moves inwards and abuts against the piston, meanwhile, the oil inlet hole is sealed, the pushing piece is continuously pushed, the pushing piece drives the piston to move towards the direction of the oil return cavity together until the piston leaves the oil inlet, the oil inlet is communicated, oil enters the oil inlet cavity from the oil inlet, the oil cannot flow towards the oil return cavity due to the fact that the oil inlet hole is sealed by the pushing piece, the oil pressure on one side of the oil inlet cavity is continuously increased, the piston is assisted to be pushed under the action of the oil pressure difference between the oil inlet cavity and the oil return cavity, and the acting force requirement for pushing the piston. In this working process, because of oil inlet department is by the piston shutoff all the time during initial condition, the oil pressure of oil inlet department keeps at higher level, then in case the intercommunication is located to the oil inlet, fluid can enter into the oil feed chamber fast, simultaneously, the fluid that gets into in the oil feed chamber can not flow to back the oil pocket, and the oil pressure rising speed is fast, and work efficiency is high.

In the booster of the hydraulic brake protection device, the side part of the inner end of the pushing piece is provided with a convex sealing part, the sealing part is tightly abutted against the side wall of the inner cavity, one side of the sealing part facing the outer end of the pushing piece is provided with a cavity, and the piston is provided with a through hole which is communicated with the oil inlet cavity and the cavity in a penetrating manner.

In foretell hydraulic braking protection device booster, the annular seal groove has been seted up in the inner outside of impeller, the sealing part is including setting up the O type circle in the seal groove and establishing the transversal square sealing washer of personally submitting in the O type circle outside, the sealing washer part stretches out the seal groove.

In the booster of the hydraulic brake protection device, sealing parts are respectively fixed on two sides of the oil inlet on the outer side of the piston, and the sealing parts are tightly abutted against the inner wall of the cylinder body.

In the above booster for a hydraulic brake protection device, the number of the oil return holes is several and the oil return holes are all obliquely arranged in the piston.

In the booster of the hydraulic brake protection device, two cavities are arranged in the cylinder body, the piston, the reset spring, the pushing piece and the return spring are arranged in the two cavities, a balance hole communicated with the two cavities is further formed in the cylinder body, two ends of the balance hole are respectively located on the side portions of the two cavities, balance valves capable of opening and closing the balance hole are arranged at two ends of the balance hole, a valve core portion of each balance valve extends into the corresponding cavity, a cylindrical piston sleeve is further fixed on each piston, and the piston sleeve can move along with the piston to push the valve core of each balance valve to retract into the corresponding balance hole and open the corresponding balance hole.

In the booster of the hydraulic brake protection device, an overflow valve is connected between the oil inlet and the oil return port on the outer side of the cylinder body.

Compared with the prior art, this hydraulic braking protection device booster adopts the normal close formula structure for under the initial condition, fluid does not enter into the cylinder body, keeps the oil pressure of oil inlet department to be in higher state, and when oil inlet department switched on, fluid can enter into the cylinder body rapidly, has improved work efficiency.

Drawings

Fig. 1 is a schematic sectional view of a booster of the hydraulic brake protection device.

FIG. 2 is a schematic cross-sectional view of the hydraulic brake protection device at the booster relief valve.

In the figure, 1, a cylinder body; 2. a piston; 3. a return spring; 4. a pusher member; 5. an oil inlet cavity; 6. an oil return cavity; 7. an inner cavity; 8. an oil inlet hole; 9. an oil return hole; 10. a return spring; 11. a sealing part; 12. a cavity; 13. a through hole; 14. a seal member; 15. a piston sleeve; 16. an overflow valve.

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, the booster of the hydraulic brake protection device comprises a cylinder body 1 with an oil inlet, an oil return port and an oil outlet, a piston 2 arranged in the cylinder body 1, a return spring 3 and a pushing piece 4 with the inner end extending into the cylinder body 1, wherein the piston 2 divides the interior of the cylinder body 1 into an oil inlet cavity 5 capable of being communicated with the oil inlet, an oil return cavity 6 communicated with the oil return port and an oil outlet cavity communicated with the oil outlet, and the oil outlet cavity, the oil return cavity 6 and the oil inlet cavity 5 are sequentially arranged.

The piston 2 is internally provided with a cylindrical inner cavity 7, an oil inlet hole 8 for communicating the oil inlet cavity 5 with the inner cavity 7 and an oil return hole 9 for communicating the inner cavity 7 with the oil return cavity 6, two ends of the reset spring 3 are respectively abutted against the inner wall of the cylinder body 1 and the piston 2, and the piston 2 moves under the elastic action of the reset spring 3 and blocks the oil inlet. The specific structure of the plug comprises sealing elements 14 which are fixed on the outer side of the piston 2 and are respectively arranged on two sides of the oil inlet, and the sealing elements 14 are tightly abutted against the inner wall of the cylinder body 1. The number of the oil return holes 9 is several and they are all obliquely opened in the piston 2.

The inner end of the pushing piece 4 extends into the inner cavity 7, the side part of the inner end of the pushing piece 4 is provided with a convex sealing part 11, the sealing part 11 is tightly abutted against the side wall of the inner cavity 7, a return spring 10 is further arranged in the inner cavity 7, two ends of the return spring 10 are respectively acted on the piston 2 and the pushing piece 4, the pushing piece 4 moves outwards under the elastic force of the return spring 10 and enables the oil inlet hole 8 to be communicated to the inner cavity 7, and when the pushing piece 4 moves towards the inner end direction until the inner end of the pushing piece 4 abuts against the piston 2, the oil inlet hole 8 on the side part of the piston 2 is sealed by a sealing piece 14. A cavity 12 is formed between one side of the sealing part 11 facing the outer end of the pushing part 4 and the inner wall of the piston 2 and the cylinder body 1, and a through hole 13 for communicating the oil inlet cavity 5 with the cavity 12 penetrates through the piston 2. In this embodiment, an annular sealing groove is formed in the outer side of the inner end of the pushing member 4, the sealing portion 11 includes an O-ring disposed in the sealing groove and a sealing ring having a square cross section and disposed on the outer side of the O-ring, and the sealing ring partially extends out of the sealing groove.

Have two cavitys in the cylinder body 1, all be provided with above-mentioned piston 2 in two cavitys, reset spring 3, impeller 4 and return spring 10, the balance hole of two cavitys of intercommunication has still been seted up in the cylinder body 1, the both ends in balance hole are located two lateral parts that go out the oil pocket respectively, the both ends in balance hole all are provided with the balanced valve that can open and close the balance hole, and the case part of balanced valve stretches into in the cavity, the front end of piston 2 stretches into out the oil intracavity, 2 front ends of piston are fixed with and are cylindric piston bush 15, piston bush 15 can move with the case retraction balance hole that promotes the balanced valve and open the balance hole along with piston 2.

As shown in fig. 2, an overflow valve 16 is further connected between the oil inlet and the oil return port on the outer side of the cylinder body 1, a valve body of the overflow valve 16 is connected with the cylinder body 1 into a whole, and the overflow valve 16 can be opened when the oil pressure at the oil inlet is too high, so that the oil at the oil inlet flows to the oil outlet through the overflow valve 16 to realize oil return, and the use safety of the cylinder body 1 and external oil supply equipment is ensured.

When the booster of the hydraulic brake protection device is used, if an operator does not push the pushing piece 4, the pushing piece 4 moves outwards under the elastic force of the return spring 10 and conducts the oil inlet 8, and oil remained in the oil inlet cavity 5 can flow to the oil return port through the oil inlet 8, the inner cavity 7 and the oil return hole 9 to return oil. The piston 2 moves to the initial position under the action of the elastic force of the return spring 3 and blocks the oil inlet, and oil output by external oil supply equipment is accumulated at the oil inlet and cannot enter the cylinder body 1. When an operator pushes the pushing piece 4 inwards, the pushing piece 4 overcomes the elastic force of the return spring 10 to move inwards and abut against the piston 2, meanwhile, the oil inlet hole 8 is blocked by the sealing part 11, the pushing piece 4 is continuously pushed, the pushing piece 4 drives the piston 2 to move towards the direction of the oil return cavity 6 until the piston 2 leaves the oil inlet, and the oil inlet is communicated. Fluid gets into oil feed chamber 5 from the oil inlet, because of inlet port 8 is by the shutoff of impeller 4, fluid can't be to returning oil chamber 6 flow, then the oil pressure of oil feed chamber 5 one side constantly risees, under the poor effect of oil pressure between oil feed chamber 5 and the oil return chamber 6, supplementary promotion piston 2, the effort demand that reduces promotion piston 2.

After the work is finished, the pushing piece 4 is loosened, the pushing piece 4 and the piston 2 respectively return to the initial positions under the elastic force action of the return spring 10 and the return spring 3, the oil inlet is blocked, and oil in the oil inlet cavity 5 and the cavity 12 flows back along the oil inlet hole 8, the inner cavity 7, the oil return hole 9 and the oil return opening.

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. A booster of a hydraulic brake protection device comprises a cylinder body (1) with an oil inlet and an oil return port, a piston (2) arranged in the cylinder body (1), a reset spring (3) and a pushing piece (4) with the inner end extending into the cylinder body (1), wherein the piston (2) separates an oil inlet cavity (5) capable of being communicated with the oil inlet and an oil return cavity (6) communicated with the oil return port from the cylinder body (1), the piston (2) is internally provided with a columnar inner cavity (7), an oil inlet hole (8) communicated with the oil inlet cavity (5) and the inner cavity (7) and an oil return hole (9) communicated with the inner cavity (7) and the oil return cavity (6), and is characterized in that the piston (2) can move and block the oil inlet under the elastic force action of the reset spring (3), and the pushing piece (4) can extend into the inner cavity (7) and abut against the piston (2) and block the oil inlet hole (8) when moving towards the cylinder body (1), and a return spring (10) is further arranged in the inner cavity (7), two ends of the return spring (10) respectively act on the piston (2) and the pushing piece (4), and the pushing piece (4) moves outwards under the action of the elastic force of the return spring (10) and enables the oil inlet (8) to be communicated with the inner cavity (7).

2. The booster of the hydraulic brake protection device according to claim 1, wherein the side of the inner end of the pushing member (4) is provided with a convex sealing part (11), the sealing part (11) is tightly abutted with the side wall of the inner cavity (7), one side of the sealing part (11) facing the outer end of the pushing member (4) is provided with a cavity (12), and the piston (2) is provided with a through hole (13) which is communicated with the oil inlet cavity (5) and the cavity (12) in a penetrating way.

3. The booster of the hydraulic braking protection device according to claim 2, wherein an annular sealing groove is formed in the outer side of the inner end of the pushing member (4), the sealing portion (11) comprises an O-ring arranged in the sealing groove and a sealing ring which is sleeved on the outer side of the O-ring and has a square cross section, and the sealing ring partially extends out of the sealing groove.

4. The booster according to claim 1, 2 or 3, characterized in that a sealing member (14) is respectively fixed on the outer side of the piston (2) at both sides of the oil inlet, and the sealing members (14) are tightly abutted against the inner wall of the cylinder block (1).

5. The hydraulic brake protection booster of claim 1, 2 or 3, characterized in that the oil return bores (9) are several in number and each open obliquely in the piston (2).

6. The booster of the hydraulic brake protection device according to claim 1, 2 or 3, wherein the cylinder body (1) has two cavities, the piston (2), the return spring (3), the pushing member (4) and the return spring (10) are disposed in both cavities, a balance hole communicating the two cavities is further formed in the cylinder body (1), both ends of the balance hole are respectively located at the side portions of the two cavities, both ends of the balance hole are provided with a balance valve capable of opening and closing the balance hole, a valve core portion of the balance valve extends into the cavity, a cylindrical piston sleeve (15) is further fixed on the piston (2), and the piston sleeve (15) can move along with the piston (2) to push the valve core of the balance valve to retract into the balance hole and open the balance hole.

7. The hydraulic brake protection booster of claim 1, 2 or 3, wherein a relief valve (16) is connected between the oil inlet and the oil return on the outside of the cylinder (1).