Brake piston, power assisting assembly and braking system
By designing a second hole in the piston body of the brake piston, the hydraulic pressure is slowly released through the second hole during the reset process, solving the problem of instantaneous loss of deceleration when the brake mechanism is reset, and improving driving stability and safety.
Patent Information
- Application Number
- CN202421726619.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-19
- Publication Date
- 2025-04-22
- Estimated Expiration
- 2034-07-19
AI Technical Summary
In the prior art, when the assisted brake mechanism is reset, the brake fluid directly flows back through the oil replenishment port, resulting in an instant loss of deceleration, affecting the stability and safety of driving.
A brake piston is designed. During the reset process, the piston body is first communicated with the container through the second hole to slowly release the hydraulic pressure, thereby avoiding instantaneous loss of deceleration.
The slow reduction of vehicle deceleration is achieved, ensuring the stability and safety of driving.
Smart Images
Figure CN222782924U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of braking, in particular to a brake piston, a power-assisting assembly and a braking system. Background Art
[0002] The braking system of a vehicle is a system that forces a moving vehicle to decelerate or stop according to the driver's requirements. At present, the braking system is usually equipped with an additional power-assisted braking mechanism. When the driver steps on the pedal, the power-assisted braking mechanism will also deliver brake fluid to the caliper, thereby enhancing the braking force. However, in the prior art, when the power-assisted braking mechanism is reset to the initial position, the fluid chamber of the power-assisted braking mechanism will be directly connected to the oil tank through the oil filling port. This process has the problem of instantaneous loss of deceleration, which is not conducive to the stability and safety of driving. Utility Model Content
[0003] The utility model aims to solve one of the technical problems in the related art at least to a certain extent.
[0004] To this end, an embodiment of the utility model proposes a brake piston, which can avoid the instantaneous loss of deceleration when the brake fluid flows back to the oil tank, thereby achieving a slow reduction in vehicle deceleration and ensuring driving stability and safety.
[0005] The embodiment of the utility model also provides a power assist assembly including the above-mentioned brake piston.
[0006] The embodiment of the utility model also provides a braking system including the above-mentioned power-assisting assembly.
[0007] The brake piston of an embodiment of the utility model includes a piston body, and the piston body is provided with a first hole and a second hole arranged at intervals in the axial direction of the piston body, the aperture of the second hole is smaller than the aperture of the first hole, and during the resetting process of the piston body, the second hole is connected to the container for storing brake fluid before the first hole to slowly release the hydraulic pressure of the brake.
[0008] In some embodiments, there are a plurality of the second holes, and the plurality of the second holes are spaced apart along the axial direction of the piston body.
[0009] In some embodiments, the diameters of the second holes gradually decrease in a direction away from the first hole.
[0010] In some embodiments, a plurality of the second holes are arranged in a spiral pattern along the axial direction of the piston body.
[0011] In some embodiments, in the axial direction of the piston body, the first hole and the second hole are arranged opposite to each other.
[0012] In some embodiments, the diameter of the second hole does not exceed 12 mm.
[0013] In some embodiments, multiple hole groups are included, each of which includes multiple second holes, and multiple first holes are provided. The multiple hole groups are arranged one-to-one with the multiple first holes in the axial direction, and the multiple first holes and the multiple hole groups are arranged at intervals along the circumference of the piston body.
[0014] In some embodiments, the multiple second holes of each hole group are arranged in an axial spiral arrangement along the piston body, the multiple hole groups are divided into a plurality of first groups and a plurality of second groups, the plurality of first groups and the plurality of second groups are arranged radially symmetrically with respect to the piston body, and the spiral direction of the plurality of second holes of the first group is opposite to the spiral direction of the plurality of second holes of the second group.
[0015] In some embodiments, the piston body includes a cylinder portion and a partition portion, wherein the partition portion is disposed in the cylinder portion and divides the inner cavity of the cylinder portion into a first cavity and a second cavity, wherein the first cavity is used to communicate with the inner cavity of the brake cylinder body, and the first hole and the second hole are both disposed in the cylinder portion on the outer peripheral side of the first cavity, and the first hole and the second hole both penetrate the cylinder wall of the cylinder portion along the radial direction of the cylinder portion.
[0016] The power assist assembly of the embodiment of the utility model includes the brake piston as described in any of the above embodiments.
[0017] In some embodiments, a brake cylinder is included, the brake piston is slidably assembled in the brake cylinder, and two sealing rings are provided on the inner circumference of the brake cylinder, the two sealing rings are arranged at intervals in the sliding direction of the brake piston, and the brake cylinder is provided with an opening for communicating with the first hole and the second hole, and the opening is located between the two sealing rings.
[0018] The braking system of the embodiment of the utility model includes a power-assisting assembly as described in any of the above embodiments.
[0019] Beneficial effects: The brake piston, power-assist assembly and brake system of the utility model embodiment can prevent the instantaneous loss of deceleration when the brake fluid flows back to the oil pot, thereby achieving a slow reduction in the vehicle's deceleration and ensuring driving stability and safety. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] Figure 1 It is a three-dimensional schematic diagram of a brake piston according to an embodiment of the utility model.
[0021] Figure 2 yes Figure 1Schematic side view of the brake piston.
[0022] Figure 3 yes Figure 2 Schematic cross-sectional view at AA in the middle.
[0023] Figure 4 It is a three-dimensional schematic diagram of a brake piston according to another embodiment of the utility model.
[0024] Figure 5 yes Figure 4 Schematic side view of the brake piston.
[0025] Figure 6 It is a schematic diagram of the assembly of the brake piston and the brake cylinder of an embodiment of the utility model.
[0026] Figure 7 Schematic diagram of a braking system according to an embodiment of the present utility model.
[0027] Reference numerals:
[0028] 100-brake piston;
[0029] 1- piston body; 11- first hole; 12- second hole; 13- barrel; 14- partition; 15- first cavity; 16- second cavity; 17- hole group; 171- first group; 172- second group;
[0030] 200-brake cylinder;
[0031] 300-seal ring;
[0032] 400-Power assist assembly. DETAILED DESCRIPTION
[0033] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but cannot be understood as limiting the present invention.
[0034] like Figure 1 As shown, the brake piston 100 of the embodiment of the utility model includes a piston body 1, and the piston body 1 is provided with a first hole 11 and a second hole 12 which are arranged at intervals in the axial direction of the piston body 1, the aperture of the second hole 12 is smaller than the aperture of the first hole 11, and during the resetting process of the piston body 1, the second hole 12 is connected to the container for storing brake fluid before the first hole 11 to slowly release the hydraulic pressure of the brake.
[0035] Specifically, Figure 1 and Figure 2As shown, the piston body 1 can be generally cylindrical, and the axial direction of the piston body 1 can be the front-to-back direction. The first hole 11 and the second hole 12 can be arranged at intervals along the front-to-back direction, wherein the first hole 11 has a larger aperture and can be regarded as an oil replenishment port, and the second hole 12 is a micro hole, and the aperture of the second hole 12 is much smaller than the aperture of the first hole 11.
[0036] When in use, the piston body 1 can be fitted into the brake cylinder 200. When the piston body 1 moves forward, the brake fluid in the brake cylinder 200 can be pushed to the clamp of the wheel, thereby increasing the brake hydraulic pressure and braking force.
[0037] After braking is completed, the piston body 1 can move backward relative to the brake cylinder 200 and achieve reset. During the reset process, the second hole 12 will first be connected between the brake cylinder 200 and the oil pot, and the hydraulic pressure of part of the brake fluid can be released through the second hole 12. Then, as the piston body 1 continues to reset backward, the first hole 11 will be connected between the brake cylinder 200 and the oil pot, thereby further achieving the complete release of the hydraulic pressure of the brake fluid.
[0038] The brake piston 100 of the embodiment of the utility model adds a second hole 12 on the piston body 1, so that part of the hydraulic pressure can be slowly released in advance through the second hole 12, so that the deceleration of the vehicle can be slowly reduced, avoiding the situation in the prior art where only an oil replenishing port is provided, resulting in instantaneous loss of deceleration when the brake fluid flows back to the oil tank, thereby ensuring driving stability and safety.
[0039] In some embodiments, there are a plurality of second holes 12, and the plurality of second holes 12 are arranged at intervals along the axial direction of the piston body 1. Figure 4 As shown, two second holes 12 can be provided on the rear side of the first hole 11, and the two second holes 12 can be arranged at intervals in the front-to-rear direction. Therefore, in the process of the piston body 1 resetting backward, the two second holes 12 can be connected in sequence between the brake cylinder 200 and the oil pot, so that the different numbers of second holes 12 connected between the brake cylinder 200 and the oil pot can achieve stepped pressure relief, further ensuring the stability of the overall pressure relief process.
[0040] In some other embodiments, three, four, five or other number of second holes 12 may be provided on the rear side of the first hole 11 .
[0041] In some embodiments, the diameters of the second holes 12 gradually decrease in a direction away from the first hole 11. Figure 4 As shown, the apertures of the two second holes 12 gradually decrease from the front to the back, thereby further improving the stability of the overall pressure relief process.
[0042] In some embodiments, the plurality of second holes 12 are arranged in a spiral arrangement along the axial direction of the piston body 1. Figure 4 As shown, the plurality of second holes 12 behind the first hole 11 can be arranged in a spiral interval around the axis of the piston body 1. Thus, the plurality of second holes 12 can be arranged in an axially staggered manner, which is beneficial to reduce the flow interference of the brake fluid between two adjacent second holes 12, and further ensures the stability of the pressure relief.
[0043] In some embodiments, in the axial direction of the piston body 1, the first hole 11 and the second hole 12 are arranged opposite to each other. Figures 1 to 3 As shown, the second hole 12 can be located directly behind the first hole 11, so that the first hole 11 and the second hole 12 can be processed by one alignment, thereby simplifying the processing technology.
[0044] In some embodiments, the diameter of the second hole 12 does not exceed 12 mm. For example, the diameter of the second hole 12 may be 1 mm, 2 mm, 3 mm, 4 mm, 5 mm, 6 mm, 7 mm, 8 mm, 9 mm, 10 mm, 11 mm, 12 mm, etc. Thus, the diameter of the second hole 12 may be smaller, thereby fully meeting the use requirements of partial pressure relief in advance.
[0045] In some embodiments, Figure 4 As shown, the brake piston 100 includes a plurality of hole groups 17, each hole group 17 includes a plurality of second holes 12, for example, each hole group 17 may include two second holes 12, a plurality of first holes 11 are provided, and the plurality of hole groups 17 are axially arranged in one-to-one correspondence with the plurality of first holes 11, for example, the plurality of hole groups 17 may be arranged one-to-one on the rear side of the plurality of first holes 11, and the plurality of first holes 11 and the plurality of hole groups 17 are arranged at intervals along the circumference of the piston body 1.
[0046] Therefore, on the one hand, the pressure relief efficiency can be improved, and on the other hand, it is also conducive to ensuring the consistency and balance of pressure relief in all circumferential directions, thereby ensuring the stability of the displacement of the brake piston 100.
[0047] In some embodiments, the multiple second holes 12 of each hole group 17 are arranged in an axial spiral arrangement along the piston body 1, and the multiple hole groups 17 are divided into multiple first groups 171 and multiple second groups 172. The multiple first groups 171 and the multiple second groups 172 are arranged radially symmetrically about the piston body 1, and the spiral direction of the multiple second holes 12 of the first group 171 is opposite to the spiral direction of the multiple second holes 12 of the second group 172.
[0048] For example, Figure 5As shown, the multiple second holes 12 of the first group 171 can be arranged in a right spiral manner, and the multiple second holes 12 of the second group 172 can be arranged in a left spiral manner. As a result, the reverse force generated by the brake fluid flowing out of the first group 171 and the second group 172 can be arranged in a mirror-symmetrical manner and can offset each other, thereby ensuring the stability of the movement of the brake piston 100.
[0049] In some embodiments, the piston body 1 includes a cylinder portion 13 and a partition portion 14, for example Figure 3 As shown, the barrel 13 can be cylindrical, the partition 14 can be integrally formed in the barrel 13, the partition 14 is arranged in the barrel 13 and divides the inner cavity of the barrel 13 into a first cavity 15 and a second cavity 16, when the piston body 1 is assembled into the brake cylinder 200, the first cavity 15 can face the brake cylinder 200 and communicate with the inner cavity of the brake cylinder 200, the first hole 11 and the second hole 12 are both arranged in the barrel 13 on the outer peripheral side of the first cavity 15, and the first hole 11 and the second hole 12 both penetrate the barrel wall of the barrel 13 along the radial direction of the barrel 13. Therefore, the communication arrangement of the first hole 11 and the second hole 12 with the brake cylinder 200 is facilitated.
[0050] The power assist assembly 400 according to an embodiment of the present utility model is described below.
[0051] like Figure 6 As shown, the power assist assembly 400 of the embodiment of the utility model includes a brake piston 100 , and the brake piston 100 may be the brake piston 100 described in any of the above embodiments.
[0052] In some embodiments, Figure 6 As shown, the power assist assembly 400 includes a brake cylinder 200, a brake piston 100 is slidably assembled in the brake cylinder 200, and two sealing rings 300 are provided on the inner circumference of the brake cylinder 200. The sealing ring 300 can be an O-type rubber ring. The two sealing rings 300 are arranged at intervals in the sliding direction (front and rear direction) of the brake piston 100, and the brake cylinder 200 is provided with an opening for communicating with the first hole 11 and the second hole 12, and the opening is located between the two sealing rings 300.
[0053] During the process of the piston body 1 resetting backward, the second hole 12 will first move between the two sealing rings 300, and the brake fluid in the brake cylinder 200 will flow back to the oil pot via the first chamber 15, the second hole 12, and the opening. As the piston body 1 continues to move backward and reset, the first hole 11 will move between the two sealing rings 300, and then the brake fluid in the brake cylinder 200 will flow back to the oil pot via the first chamber 15, the first hole 11, and the opening.
[0054] The braking system of the embodiment of the utility model is described below.
[0055] The braking system of the embodiment of the utility model includes a power-assisting assembly 400, and the power-assisting assembly 400 can be the power-assisting assembly 400 described in any of the above embodiments. Figure 7 As shown, the power assist assembly 400 may include a brake, and the brake includes a brake cylinder 200 and a brake piston 100, wherein an opening on the brake cylinder 200 may be directly connected to a small oil pot through a pipeline.
[0056] When braking, the operator can step on the pedal and the motor of the power assist assembly 400 ( Figure 7 The motor M1 will also operate and drive the brake piston 100 to move into the brake cylinder 200, thereby achieving the effect of boosting pressure. After the braking is completed, the motor M1 can be turned over, thereby driving the brake piston 100 to reset backward. During the reset process, the second hole 12 on the brake piston 100 will first connect the brake cylinder 200 and the small oil pot, thereby achieving partial pressure relief, and then the first hole 11 will be connected between the brake cylinder 200 and the small oil pot, thereby completely relieving pressure.
[0057] Although the above embodiments have been shown and described, it is to be understood that the above embodiments are illustrative and cannot be construed as limitations on the present invention. Changes, modifications, substitutions and variations of the above embodiments by those of ordinary skill in the art are all within the scope of protection of the present invention.
Claims
1. A brake piston, characterized in that: The invention comprises a piston body, wherein the piston body is provided with a first hole and a second hole which are spaced apart in the axial direction of the piston body, the aperture of the second hole is smaller than the aperture of the first hole, and during the resetting process of the piston body, the second hole is connected with a container for storing brake fluid before the first hole to slowly release the hydraulic pressure of the brake.
2. The brake piston according to claim 1, characterized in that There are a plurality of the second holes, and the plurality of the second holes are arranged at intervals along the axial direction of the piston body.
3. The brake piston according to claim 2, characterized in that The diameters of the second holes gradually decrease in a direction away from the first hole.
4. The brake piston according to claim 3, characterized in that A plurality of the second holes are arranged in a spiral manner along the axial direction of the piston body.
5. The brake piston according to claim 1, characterized in that In the axial direction of the piston body, the first hole and the second hole are arranged opposite to each other.
6. The brake piston according to claim 1, characterized in that The diameter of the second hole does not exceed 12 mm.
7. The brake piston according to claim 1, characterized in that It comprises a plurality of hole groups, each of which comprises a plurality of the second holes, and a plurality of the first holes are provided. The plurality of hole groups are arranged one by one with the plurality of the first holes in the axial direction, and the plurality of the first holes and the plurality of hole groups are arranged at intervals along the circumference of the piston body.
8. The brake piston according to claim 7, characterized in that The multiple second holes of each hole group are arranged in an axial spiral arrangement along the piston body, the multiple hole groups are divided into multiple first groups and multiple second groups, the multiple first groups and the multiple second groups are arranged radially symmetrically with respect to the piston body, and the spiral direction of the multiple second holes of the first group is opposite to the spiral direction of the multiple second holes of the second group.
9. The brake piston according to any one of claims 1 to 8, characterized in that The piston body includes a cylinder portion and a partition portion, wherein the partition portion is arranged in the cylinder portion and divides the inner cavity of the cylinder portion into a first cavity and a second cavity, wherein the first cavity is used to communicate with the inner cavity of the brake cylinder body, and the first hole and the second hole are both arranged in the cylinder portion on the outer peripheral side of the first cavity, and the first hole and the second hole both penetrate the cylinder wall of the cylinder portion along the radial direction of the cylinder portion.
10. A power assist assembly, characterized in that: The invention comprises a brake piston as claimed in any one of claims 1 to 9.
11. The power assist assembly according to claim 10, characterized in that: It includes a brake cylinder body, the brake piston is slidably assembled in the brake cylinder body, and two sealing rings are provided on the inner circumference of the brake cylinder body, the two sealing rings are arranged at intervals in the sliding direction of the brake piston, and the brake cylinder body is provided with an opening for communicating with the first hole and the second hole, and the opening is located between the two sealing rings.
12. A braking system, characterized in that: It comprises the power assist assembly as described in claim 10 or 11 above.