CN212073997U - Hydraulic boosting type brake master cylinder - Google Patents
Hydraulic boosting type brake master cylinder Download PDFInfo
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- CN212073997U CN212073997U CN202020658866.2U CN202020658866U CN212073997U CN 212073997 U CN212073997 U CN 212073997U CN 202020658866 U CN202020658866 U CN 202020658866U CN 212073997 U CN212073997 U CN 212073997U
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- master cylinder
- brake master
- type brake
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Abstract
The utility model provides a hydraulic power-assisted brake master cylinder, which comprises a cavity, wherein a first-stage plunger and a second-stage plunger are arranged in the cavity, one end of the first-stage plunger is connected with one end of the second-stage plunger through a first spring, and the other end of the second-stage plunger is connected with the inner wall of the other end of the cavity through a second spring; the side wall of the cavity is provided with a power source inlet, the hydraulic boosting type brake master cylinder can improve the maximum pressure of a brake pipeline under the condition that the input pressure of the brake master cylinder and the diameter of a working plunger of the brake master cylinder are not changed, and the area ratio of an input stress surface and an output stress surface can be adjusted according to a lifting target value; the input and output pressure can be adjusted in theory without the original structure of the whole vehicle.
Description
Technical Field
The utility model relates to a helping hand braking field especially relates to a hydraulic pressure helping hand formula braking master cylinder.
Background
With the technical development of the current new energy (hybrid power and pure electric) automobile and intelligent driving automobile, the new energy automobile and the intelligent driving automobile put forward more requirements on the braking system of the motor vehicle. The original vacuum booster brake system is difficult to realize new requirements, so that the hydraulic booster system is researched and developed and is widely applied.
The boosting function of the vacuum boosting brake system completely depends on the vacuum degree provided by an engine or an electronic vacuum pump, a push rod is pushed out by pressure difference, the force of the push rod acts on a primary plunger of a brake master cylinder again, if the pressure in a brake pipeline is required to be increased, the vacuum degree can only be increased, but the vacuum degree is difficult to increase when reaching a certain value, and the pressure of the brake pipeline cannot be increased under the condition.
In the hydraulic power-assisted system, a power source of a primary plunger of a brake master cylinder is high-pressure liquid. When it is desired to increase brake line pressure, there may be two approaches: 1) improving the input pressure of the power source; 2) and adjusting the area ratio of the input stress surface to the output stress surface.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a hydraulic pressure helping hand formula brake master cylinder to above-mentioned prior art not enough, adjusts the area ratio of input stress surface and output stress surface, arbitrary adjustment input/output pressure according to the target value that promotes.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
the utility model provides a hydraulic power-assisted brake master cylinder, which comprises a cavity, wherein a first-stage plunger and a second-stage plunger are arranged in the cavity, one end of the first-stage plunger is connected with one end of the second-stage plunger through a first spring, and the other end of the second-stage plunger is connected with the inner wall of the other end of the cavity through a second spring; and a power source inlet is formed in the side wall of the cavity.
Further, the power source inlet is arranged between the other end of the primary plunger and the inner wall of one end of the cavity.
Furthermore, two oil inlets which are arranged at intervals are also arranged on one side wall of the cavity, and the two oil inlets are arranged at the same side as the power source inlet.
Furthermore, an oil return port and two oil outlets are arranged on the other side wall of the cavity, and the oil return port and the two oil outlets are arranged at intervals along the direction towards the secondary plunger.
Furthermore, the first-stage plunger and the second-stage plunger with the two sides of the cavity are provided with a plurality of pressure leather cups.
Furthermore, the pressure packing cups on the two sides are symmetrically arranged.
Further, two oil inlets all set up in the pressure leather cup.
Further, the height of the cavity for accommodating the primary plunger is greater than the height of the cavity for accommodating the secondary plunger.
Further, the sectional area of the cavity for accommodating the secondary plunger is the same as that of the secondary plunger.
The parts are all cylinders, and the section views of the axial section are the same.
The utility model has the advantages that: the hydraulic boosting type brake master cylinder can improve the maximum pressure of a brake pipeline (improve the brake strength) under the condition that the input pressure of the brake master cylinder and the diameter of a working plunger of the brake master cylinder are not changed, and under the condition, the area ratio of an input stress surface and an output stress surface can be adjusted according to a lifting target value. The input and output pressure can be adjusted in theory without the original structure of the whole vehicle.
Drawings
Fig. 1 is a schematic structural view of a hydraulic booster type brake master pump.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.
Referring to fig. 1, a hydraulic power-assisted brake master cylinder comprises a cavity 1, wherein a primary plunger 5 and a secondary plunger 3 are arranged in the cavity 1, one end of the primary plunger 5 is connected with one end of the secondary plunger 3 through a first spring 4, and the other end of the secondary plunger 3 is connected with the inner wall of the other end of the cavity 1 through a second spring 2; and a power source inlet 9 is arranged on the side wall of the cavity 1.
The power source inlet 9 is arranged between the other end of the primary plunger 5 and the inner wall of one end of the cavity 1.
I.e. pressure fluid enters from the power source inlet 9, raising the pressure in the chamber.
And two oil inlets 101 which are arranged at intervals are also arranged on one side wall of the cavity 1, and the two oil inlets 101 are arranged at the same side as the power source inlet 9.
And an oil return port 102 and two oil outlet ports 103 are arranged on the other side wall of the cavity 1, and the oil return port 102 and the two oil outlet ports 103 are arranged at intervals along the direction towards the secondary plunger 3.
The first-stage plunger 5 and the second-stage plunger 3 with the two sides of the cavity 1 are both provided with a plurality of pressure leather cups 8.
The pressure cups 8 on the two sides are symmetrically arranged.
Wherein, the pressure leather cup 8 has the following functions: sealing the pressure fluid delivered from the power source inlet 9 and increasing the pressure in the chamber.
The two oil inlets 101 are both arranged in the pressure cup 8.
The height of the cavity 1 for accommodating the primary plunger 5 is greater than the height of the cavity 1 for accommodating the secondary plunger 3.
The sectional area of the cavity 1 for accommodating the secondary plunger 3 is the same as that of the secondary plunger 3.
Wherein, the oil outlets 103 are all connected with wheel brake calipers to form a closed brake device.
When pressure liquid is input into the power source, the large end face of the primary plunger 5 is stressed, the hole seals the pressure liquid transmitted by the power source by using the pressure leather cup 8, so that the pressure in the cavity is increased, and the primary plunger 5 moves forwards along with the increase of the input pressure of the power source; as the primary plunger 5 moves forward, the first spring 4 and the second spring 2 will move simultaneously, while the secondary plunger 3 will also move forward.
In the process, the primary plunger 5 and the secondary plunger 3 cross the two oil inlets 101 to push the liquid in the two chambers to flow to the brakes of the wheels, and the brakes are braked after pressure is built up.
After the power source is removed, the primary plunger 5 and the secondary plunger 3 are returned to the initial positions by the reaction of the first spring 4 and the second spring 2.
In the design, the secondary plunger 2 is a cylinder with a uniform section; the first-stage plunger 5 adopts a variable cross-section form, the cross-sectional area of the power source inlet 9 end is larger than that of the oil outlet 103 end, and the cross-sectional area of the oil outlet 103 end of the first-stage plunger 5 is the same as that of the second-stage plunger 2, so that the pressure of the two oil outlets is equal.
According to the variable cross-section design of the primary plunger 5, according to the law of conservation of energy, when the primary plunger 5 is balanced and immobile at a certain position in an effective stroke, the force applied to the cross section of the oil outlet end is equal to the force applied to the cross section of the power source end, but the cross section area of the power source end is larger than that of the oil outlet end, so that the hydraulic pressure of the oil outlet end is larger than that of the power source end.
Therefore, the variable-section plunger structure realizes the boosting effect.
The above-mentioned embodiments only express the embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.
Claims (9)
1. A hydraulic boosting type brake master cylinder is characterized in that: the plunger type plunger pump comprises a cavity (1), wherein a primary plunger (5) and a secondary plunger (3) are arranged in the cavity (1), one end of the primary plunger (5) is connected with one end of the secondary plunger (3) through a first spring (4), and the other end of the secondary plunger (3) is connected with the inner wall of the other end of the cavity (1) through a second spring (2); and a power source inlet (9) is formed in the side wall of the cavity (1).
2. The hydraulic booster-type brake master cylinder according to claim 1, characterized in that: the power source inlet (9) is arranged between the other end of the primary plunger (5) and the inner wall of one end of the cavity (1).
3. The hydraulic booster-type brake master cylinder according to claim 2, characterized in that: and two oil inlets (101) arranged at intervals are further formed in one side wall of the cavity (1), and the two oil inlets (101) are arranged on the same side as the power source inlet (9).
4. A hydraulic booster-type brake master cylinder according to claim 3, characterized in that: and an oil return port (102) and two oil outlets (103) are arranged on the other side wall of the cavity (1), and the oil return port (102) and the two oil outlets (103) are arranged at intervals along the direction towards the secondary plunger (3).
5. The hydraulic booster-type brake master cylinder according to claim 4, characterized in that: the one-level plunger (5) and the two-level plunger (3) with the two sides of the cavity (1) are provided with a plurality of pressure leather cups (8).
6. The hydraulic booster-type brake master cylinder according to claim 5, characterized in that: the pressure packing cups (8) on the two sides are symmetrically arranged.
7. The hydraulic booster-type brake master cylinder according to claim 6, characterized in that: the two oil inlets (101) are arranged in the pressure leather cup (8).
8. The hydraulic booster-type brake master cylinder according to claim 7, characterized in that: the height of the cavity (1) for accommodating the primary plunger (5) is greater than the height of the cavity (1) for accommodating the secondary plunger (3).
9. The hydraulic booster-type brake master cylinder according to claim 8, characterized in that: the sectional area of the cavity (1) for accommodating the secondary plunger (3) is the same as that of the secondary plunger (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020658866.2U CN212073997U (en) | 2020-04-27 | 2020-04-27 | Hydraulic boosting type brake master cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020658866.2U CN212073997U (en) | 2020-04-27 | 2020-04-27 | Hydraulic boosting type brake master cylinder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212073997U true CN212073997U (en) | 2020-12-04 |
Family
ID=73587978
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020658866.2U Active CN212073997U (en) | 2020-04-27 | 2020-04-27 | Hydraulic boosting type brake master cylinder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212073997U (en) |
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2020
- 2020-04-27 CN CN202020658866.2U patent/CN212073997U/en active Active
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