CN110641437A - High-performance hydraulic brake master cylinder - Google Patents
High-performance hydraulic brake master cylinder Download PDFInfo
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- CN110641437A CN110641437A CN201911062914.XA CN201911062914A CN110641437A CN 110641437 A CN110641437 A CN 110641437A CN 201911062914 A CN201911062914 A CN 201911062914A CN 110641437 A CN110641437 A CN 110641437A
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- oil
- hole
- cavity
- cup
- rubber cup
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T11/00—Transmitting braking action from initiating means to ultimate brake actuator without power assistance or drive or where such assistance or drive is irrelevant
- B60T11/10—Transmitting braking action from initiating means to ultimate brake actuator without power assistance or drive or where such assistance or drive is irrelevant transmitting by fluid means, e.g. hydraulic
- B60T11/16—Master control, e.g. master cylinders
Abstract
The invention provides a high-performance hydraulic brake master cylinder, which comprises a cylinder body, wherein a piston is arranged in the cylinder body, a brake cavity and an oil inlet cavity are formed between the piston and the cylinder body, and the brake cavity is positioned on the front side of the oil inlet cavity; the front end of the cylinder body is provided with an oil outlet communicated with the brake cavity; the rear end of the cylinder body is provided with an oil cup hole, the bottom of the oil cup hole is provided with an oil inlet hole communicated with the oil inlet cavity, and the bottom of the oil cup hole is provided with an oil overflow hole communicated with the inner cavity of the cylinder body; a one-way valve I which only allows oil in the oil cup hole to enter the oil inlet cavity is arranged in the oil inlet hole; an annular rubber cup is arranged on the piston between the brake cavity and the oil inlet cavity, an annular boss is arranged on the piston at the rear side of the rubber cup, and the boss abuts against and is in sealing fit with the rear side face of the rubber cup; a spring is arranged in the brake cavity, the front end of the spring is abutted against the front end of the cylinder body, and the rear end of the spring extends into the rubber cup and is abutted against the rubber cup; the rubber cup is characterized in that the boss is provided with a first oil hole communicated with the front side and the rear side of the boss, and the rubber cup is provided with a second oil hole communicated with the front side and the rear side of the rubber cup.
Description
Technical Field
The invention relates to the technical field of brake assemblies, in particular to a high-performance hydraulic brake master cylinder.
Background
The brake main cylinder belongs to a one-way acting piston type hydraulic cylinder, and has the function of converting mechanical energy input by a pedal mechanism into hydraulic energy, and is mainly divided into a single-cavity type and a double-cavity type.
When the brake fluid is used, a driver treads on the pedal to force the piston to move forwards through the push rod, in the process, the piston drives the rubber cup to cross the overflow hole, the hydraulic pipeline is closed at the moment, and the pedaling force is transmitted downwards through the brake fluid. When the brake is released, the return spring pushes the piston to return quickly.
During the entire braking process, a high flow rate and high oil pressure is desired to achieve a relatively high braking efficiency. However, the two states are opposite in the process of forward movement of the piston, and the existing mode can only make a trade-off between the two states to obtain a balanced state, so that both states can be considered, but both states are not the optimal state. Due to the arrangement, in the early stage of braking, because the pressure in the braking cavity is small, the early flow and the oil pressure are low, and the braking efficiency is not high enough.
Disclosure of Invention
In view of the problems noted in the background art, the present invention provides a high performance hydraulic brake master cylinder that can improve braking efficiency in an early stage of braking.
The technical scheme of the invention is realized as follows:
a high-performance hydraulic brake master cylinder comprises a cylinder body, wherein a piston is arranged in the cylinder body, a brake cavity and an oil inlet cavity are formed between the piston and the cylinder body, and the brake cavity is positioned on the front side of the oil inlet cavity;
the front end of the cylinder body is provided with an oil outlet communicated with the brake cavity;
the rear end of the cylinder body is provided with an oil cup hole, the bottom of the oil cup hole is provided with an oil inlet hole communicated with the oil inlet cavity, and the bottom of the oil cup hole is provided with an oil overflow hole communicated with the inner cavity of the cylinder body;
a one-way valve I which only allows oil in the oil cup hole to enter the oil inlet cavity is arranged in the oil inlet hole;
an annular rubber cup is arranged on the piston between the brake cavity and the oil inlet cavity, the section of the rubber cup is U-shaped, an opening of the rubber cup is arranged towards the front side, an annular boss is arranged on the piston at the rear side of the rubber cup, and the boss abuts against the rear side face of the rubber cup and is in sealing fit with the rear side face of the rubber cup;
a spring is arranged in the brake cavity, the spring and the piston are coaxially arranged, the front end of the spring is abutted against the front end of the cylinder body, and the rear end of the spring extends into the rubber cup and is abutted against the rubber cup;
the boss is provided with a first oil hole communicated with the front side and the rear side of the boss, the rubber cup is provided with a second oil hole communicated with the front side and the rear side of the rubber cup, and the first oil hole and the second oil hole are arranged in a staggered manner in the circumferential direction of the rubber cup;
in the initial state, the rubber cup is positioned between the oil overflow hole and the oil inlet hole, and the oil overflow hole is positioned at the front side of the oil inlet hole.
The invention is further provided that a one-way valve II which only allows oil in the oil inlet cavity to enter the brake cavity is arranged in the oil hole I.
The invention is further provided that a convex sealing plug is arranged on the rear side surface of the rubber cup, and the sealing plug is arranged corresponding to the oil hole I.
The invention is further provided that the rubber cup is fixedly connected with the piston in the circumferential direction.
The invention is further arranged in that a ring-shaped balance ring is arranged between the spring and the rubber cup, and a plurality of through holes are distributed on the balance ring.
The invention is further arranged that the edge of the boss is in sealing and sliding fit with the inner wall of the brake chamber.
The invention is further provided that the rubber cup is in sealing and sliding fit with the inner wall of the brake cavity.
By adopting the technical scheme, the invention has the beneficial effects that:
according to the high-performance hydraulic brake master cylinder provided by the invention, when the piston moves forwards, the oil inlet cavity is reduced, and due to the arrangement of the one-way valve I, brake fluid in the oil inlet cavity cannot be discharged from the oil cup, at the moment, the hydraulic pressure in the oil inlet cavity is increased, and the brake fluid in the oil inlet cavity can enter the brake cavity through the oil hole I and the oil hole II, so that the pressure in the brake cavity is increased, and the brake efficiency can be improved in the early stage of braking.
Brake fluid in the oil inlet cavity firstly enters the first oil hole and jacks up the rubber cup, so that the first oil hole and the second oil hole which are arranged in a staggered mode are communicated, and the brake fluid can enter the brake cavity.
And in the process that the piston continues to move forwards, when the rubber cup passes over the overflow hole and the oil overflow hole is communicated with the oil inlet cavity, oil in the oil inlet cavity is guided into the oil cup hole, the pressure in the oil inlet cavity is released, and the residual brake fluid enters the oil cup hole.
At the moment, along with the pressure in the braking cavity is increased to be larger than the pressure in the oil inlet cavity, the rubber cup is pressed to be in sealing fit with the boss, and the communication of the first oil hole and the second oil hole is closed.
After the brake is released, the piston moves backwards under the action of the spring, and the one-way valve is opened to start oil feeding.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic structural view of the rubber cup of the present invention;
FIG. 3 is an enlarged view of portion A of FIG. 1 according to the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention is illustrated below with reference to fig. 1-3:
a high-performance hydraulic brake master cylinder comprises a cylinder body 1, wherein a piston 2 is arranged in the cylinder body 1, a brake cavity 3 and an oil inlet cavity 4 are formed between the piston 2 and the cylinder body 1, and the brake cavity 3 is located on the front side of the oil inlet cavity 4.
The front end of the cylinder body 1 is provided with an oil outlet 5 communicated with the brake cavity 3.
The rear end of the cylinder body 1 is provided with an oil cup hole 6, the bottom of the oil cup hole 6 is provided with an oil inlet hole 7 communicated with the oil inlet cavity 4, and the bottom of the oil cup hole 6 is provided with an oil spilling hole 8 communicated with the inner cavity of the cylinder body 1.
The oil inlet hole 7 is internally provided with a one-way valve I9 which only allows the oil in the oil cup hole 6 to enter the oil inlet cavity 4.
Be equipped with annular rubber packing cup 10 on the piston 2 between braking chamber 3 and the oil feed chamber 4, the cross-section of rubber packing cup 10 is U-shaped and the opening sets up towards the front side, is equipped with annular boss 11 on the piston 2 of rubber packing cup 10 rear side, and boss 11 offsets and the sealed cooperation with the trailing flank of rubber packing cup 10.
The braking cavity 3 is internally provided with a spring 12, the spring 12 and the piston 2 are coaxially arranged, the front end of the spring 12 is propped against the front end of the cylinder body 1, and the rear end of the spring 12 extends into the rubber cup 10 to be propped against the rubber cup 10.
The rubber packing structure is characterized in that the boss 11 is provided with a first oil hole 13 communicated with the front side and the rear side of the boss, the rubber packing 10 is provided with a second oil hole 14 communicated with the front side and the rear side of the rubber packing, and the first oil hole 13 and the second oil hole 14 are arranged in a staggered mode in the circumferential direction of the rubber packing 10.
In the initial state, the rubber cup 10 is positioned between the oil overflow hole 8 and the oil inlet hole 7, and the oil overflow hole 8 is positioned in front of the oil inlet hole 7.
Wherein, the oil hole I13 is provided with a check valve II 15 which only allows the oil in the oil inlet cavity 4 to enter the brake cavity 3, and the check valve II 15 can avoid the oil from flowing back.
The rear side surface of the rubber packing cup 10 is provided with a protruded sealing plug 16, the sealing plug 16 is arranged corresponding to the first oil hole 13, and the sealing plug 16 and the first oil hole 13 form sealing fit.
Wherein, the rubber cup 10 is fixedly connected with the piston 2 in the circumferential direction.
Wherein, be equipped with annular compensating ring 17 between spring 12 and rubber packing leather cup 10, compensating ring 17 on distribute and have a plurality of through-holes, the setting of compensating ring 17 makes the effort of the rubber packing leather cup of spring balanced.
Wherein, the edge of the boss 11 is in sealing and sliding fit with the inner wall of the brake cavity 3.
Wherein, the rubber cup 10 is in sealing and sliding fit with the inner wall of the brake cavity 3.
By adopting the technical scheme, the invention has the beneficial effects that:
according to the high-performance hydraulic brake master cylinder provided by the invention, when the piston 2 moves forwards, the oil inlet cavity 4 becomes small, and the brake fluid in the oil inlet cavity 4 cannot be discharged from the oil cup due to the arrangement of the one-way valve I9, at the moment, the hydraulic pressure in the oil inlet cavity 4 is increased, and the brake fluid in the oil inlet cavity 4 enters the brake cavity 3 through the oil hole I13 and the oil hole II 14, so that the pressure in the brake cavity 3 is increased, and the braking efficiency can be improved in the early stage of braking.
The brake fluid in the oil inlet cavity 4 firstly enters the first oil hole 13 and then jacks up the rubber cup 10, so that the first oil hole 13 and the second oil hole 14 which are arranged in a staggered mode are communicated, and the brake fluid can enter the brake cavity 3.
When the rubber cup 10 passes through the overflow hole and the oil overflow hole 8 is communicated with the oil inlet cavity 4 in the process that the piston 2 continues to move forwards, oil in the oil inlet cavity 4 is led into the oil cup hole 6, and the pressure in the oil inlet cavity 4 is released, so that residual brake fluid enters the oil cup hole 6.
At this time, as the pressure in the brake chamber 3 becomes greater than the pressure in the oil inlet chamber 4, the rubber cup 10 is pressed to be in sealing fit with the boss 11, and the communication between the first oil hole 13 and the second oil hole 14 is closed.
After the brake is released, the piston 2 moves backwards under the action of the spring 12, and the first check valve 9 is opened to start oil feeding.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (7)
1. A high performance hydraulic brake master cylinder characterized by: the brake device comprises a cylinder body, wherein a piston is arranged in the cylinder body, a brake cavity and an oil inlet cavity are formed between the piston and the cylinder body, and the brake cavity is positioned on the front side of the oil inlet cavity;
the front end of the cylinder body is provided with an oil outlet communicated with the brake cavity;
the rear end of the cylinder body is provided with an oil cup hole, the bottom of the oil cup hole is provided with an oil inlet hole communicated with the oil inlet cavity, and the bottom of the oil cup hole is provided with an oil overflow hole communicated with the inner cavity of the cylinder body;
a one-way valve I which only allows oil in the oil cup hole to enter the oil inlet cavity is arranged in the oil inlet hole;
an annular rubber cup is arranged on the piston between the brake cavity and the oil inlet cavity, the section of the rubber cup is U-shaped, an opening of the rubber cup is arranged towards the front side, an annular boss is arranged on the piston at the rear side of the rubber cup, and the boss abuts against the rear side face of the rubber cup and is in sealing fit with the rear side face of the rubber cup;
a spring is arranged in the brake cavity, the spring and the piston are coaxially arranged, the front end of the spring is abutted against the front end of the cylinder body, and the rear end of the spring extends into the rubber cup and is abutted against the rubber cup;
the boss is provided with a first oil hole communicated with the front side and the rear side of the boss, the rubber cup is provided with a second oil hole communicated with the front side and the rear side of the rubber cup, and the first oil hole and the second oil hole are arranged in a staggered manner in the circumferential direction of the rubber cup;
in the initial state, the rubber cup is positioned between the oil overflow hole and the oil inlet hole, and the oil overflow hole is positioned at the front side of the oil inlet hole.
2. A high performance hydraulic brake master cylinder according to claim 1, wherein: and a check valve II which only allows oil in the oil inlet cavity to enter the brake cavity is arranged in the oil hole I.
3. A high performance hydraulic brake master cylinder according to claim 1, wherein: and a convex sealing plug is arranged on the rear side surface of the rubber packing cup, and the sealing plug is arranged corresponding to the oil hole I.
4. A high performance hydraulic brake master cylinder according to claim 1, wherein: the rubber cup is fixedly connected with the piston in the circumferential direction.
5. A high performance hydraulic brake master cylinder according to claim 1, wherein: an annular balance ring is arranged between the spring and the rubber cup, and a plurality of through holes are distributed on the balance ring.
6. A high performance hydraulic brake master cylinder according to claim 1, wherein: the edge of the boss is in sealing and sliding fit with the inner wall of the brake cavity.
7. A high performance hydraulic brake master cylinder according to claim 1, wherein: the rubber cup is in sealing and sliding fit with the inner wall of the brake cavity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911062914.XA CN110641437A (en) | 2019-10-30 | 2019-10-30 | High-performance hydraulic brake master cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911062914.XA CN110641437A (en) | 2019-10-30 | 2019-10-30 | High-performance hydraulic brake master cylinder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110641437A true CN110641437A (en) | 2020-01-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911062914.XA Pending CN110641437A (en) | 2019-10-30 | 2019-10-30 | High-performance hydraulic brake master cylinder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110641437A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114704569A (en) * | 2022-04-18 | 2022-07-05 | 浙江奔腾智能制动系统有限公司 | Novel reducing plunger type brake master cylinder |
-
2019
- 2019-10-30 CN CN201911062914.XA patent/CN110641437A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114704569A (en) * | 2022-04-18 | 2022-07-05 | 浙江奔腾智能制动系统有限公司 | Novel reducing plunger type brake master cylinder |
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