A hydraulic brake caliper

Abstract

The invention discloses a hydraulic brake caliper, comprising a bracket, a hydraulic brake cylinder and a booster cylinder, wherein the booster cylinder comprises a cylinder body and a different-diameter piston, wherein the cylinder body has a small-diameter cavity and a large-diameter cavity, wherein the different-diameter piston has a small-diameter piston section and a large-diameter piston section, wherein the large-diameter piston section is located in the large-diameter cavity and is divided into a rodless cavity and a rod cavity, wherein the small-diameter piston section passes through the rod cavity and extends into the small-diameter cavity and forms a booster cavity with the small-diameter cavity, wherein the booster cavity is communicated with the inlet of the hydraulic brake cylinder, wherein the rodless cavity is provided with a liquid inlet for connecting to a brake hydraulic system, wherein the rod cavity is communicated with the inlet of the hydraulic brake cylinder through a first one-way valve, wherein the rod cavity is connected with a hydraulic oil supply and receiving assembly through a control pipeline, and further comprises an on-off control valve for controlling the on-off of the control pipeline. The hydraulic brake caliper has the advantages of being able to realize the conversion between isobaric braking and booster braking without changing the size of the hydraulic brake cylinder, and having the advantages of simple and compact structure, low cost, simple manufacturing and assembly, and easy popularization and implementation.

Description

Technical Field

[0001] The invention relates to the technical field of vehicle brake systems, and in particular to a hydraulic brake caliper. Background Art

[0002] In the vehicle braking system, the brake caliper is an actuator used to drive the brake pad to move and contact the brake disc for braking. The existing hydraulic brake caliper relies on the hydraulic brake cylinder to push the caliper body to generate the clamping force on the brake pad. The hydraulic brake cylinder is supplied with pressurized oil by the vehicle hydraulic system to perform the action. The thrust of the hydraulic brake cylinder is proportional to the pressure of the vehicle hydraulic system. It is impossible to change the thrust of the hydraulic brake cylinder when the pressure of the vehicle hydraulic system remains unchanged. If the thrust of the hydraulic brake cylinder is to be increased, the existing practice is to increase the cylinder diameter of the hydraulic brake cylinder, that is, to use a larger hydraulic brake cylinder. However, the hydraulic brake cylinder is installed inside the wheel rim, and the space inside the wheel rim is limited, which makes it difficult to install and arrange the large-sized hydraulic brake cylinder in space, or even impossible to install. In addition, it is difficult for the existing hydraulic brake caliper to adjust different braking forces when the pressure of the vehicle hydraulic system remains unchanged. Summary of the invention

[0003] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a hydraulic brake caliper that can achieve the conversion between isobaric braking and boost braking without changing the size of the hydraulic brake cylinder, and has a simple and compact structure, low cost, easy manufacture and assembly, and easy to promote and implement.

[0004] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0005] A hydraulic brake caliper comprises a bracket and a hydraulic brake cylinder arranged on the bracket, and also comprises a booster cylinder, the booster cylinder comprises a cylinder body and a reducing piston, the cylinder body has a small diameter chamber and a large diameter chamber connected in sequence, the reducing piston has a small diameter piston section and a large diameter piston section connected in sequence, the large diameter piston section is located in the large diameter chamber and divides the large diameter chamber into a rodless chamber and a rod chamber, the small diameter piston section passes through the rod chamber and extends into the small diameter chamber and forms a booster chamber with the small diameter chamber, the booster chamber is connected with the inlet of the hydraulic brake cylinder, the rodless chamber is provided with a fluid inlet for connecting to a brake hydraulic system, the rod chamber is connected with the inlet of the hydraulic brake cylinder through a first one-way valve that only allows hydraulic oil to flow from the rod chamber to the hydraulic brake cylinder, the rod chamber is connected to a hydraulic oil supply and receiving assembly through a control pipeline, and the hydraulic brake caliper also comprises an on-off control valve for controlling the on-off of the control pipeline.

[0006] As a further improvement of the above technical solution:

[0007] The cylinder body and the bracket are connected to form an integrated structural component, and the inlet of the hydraulic brake cylinder is arranged on the integrated structural component.

[0008] The integrated structural member is provided with a first passage communicating with the inlet of the hydraulic brake cylinder and the rodless chamber, and the first one-way valve is installed in the first passage.

[0009] The pressure-boosting chamber is communicated with the inlet or the first channel of the hydraulic brake cylinder through a second channel provided on the integral structural member.

[0010] The different-diameter piston is connected with an elastic mechanism for forcing the different-diameter piston to move in a direction away from the small-diameter cavity.

[0011] The elastic mechanism is a telescopic spring installed in the boosting chamber, and two ends of the telescopic spring are respectively against the inner wall of the boosting chamber and the small-diameter piston section.

[0012] The reducing piston has a connecting passage connecting the boosting chamber and the rodless chamber, and a second one-way valve is installed in the connecting passage, which only allows hydraulic oil to flow from the rodless chamber to the boosting chamber. The rodless chamber is also provided with a push piece that extends into the connecting passage when the reducing piston moves away from the small-diameter chamber and forces the valve core of the second one-way valve to open.

[0013] The hydraulic oil supply and receiving assembly is a fluid storage tank serving as a hydraulic oil source in a vehicle braking system.

[0014] The fluid inlet is connected to a brake master cylinder in a vehicle braking system.

[0015] Compared with the prior art, the advantages of the present invention are:

[0016] The hydraulic brake caliper of the present invention can realize two working modes, namely, isobaric braking and booster braking, when the brake pressure oil pressure remains unchanged, and can meet the need of the brake system to change the braking force. In addition, the booster cylinder, the first one-way valve, the control pipeline with the on-off control valve, and the hydraulic oil supply and receiving components can be arranged in the outer space of the rim, and the booster braking can be realized without increasing the size of the hydraulic brake cylinder, so that the hydraulic brake cylinder can adapt to the installation space inside the rim, ensuring that the hydraulic brake cylinder can be installed inside the rim. The hydraulic brake caliper also has the advantages of simple and compact structure, low cost, simple manufacture and assembly, and easy promotion and implementation. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is the structural principle diagram of the hydraulic brake caliper.

[0018] Legend:

[0019] 1. Bracket; 2. Hydraulic brake cylinder; 3. Cylinder body; 31. Small-diameter cavity; 311. Boosting cavity; 32. Large-diameter cavity; 321. Rodless cavity; 322. Rod-containing cavity; 323. Liquid inlet; 33. First one-way valve; 34. Second one-way valve; 35. Ejector; 4. Different-diameter piston; 41. Small-diameter piston section; 42. Large-diameter piston section; 43. Connecting channel; 5. Control pipeline; 6. Hydraulic oil supply and receiving assembly; 7. Telescopic spring; 100. Boosting cylinder; 101. First channel; 102. Second channel; 200. Brake master cylinder. DETAILED DESCRIPTION

[0020] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0021] like Figure 1 As shown, the hydraulic brake caliper of this embodiment includes a bracket 1 and a hydraulic brake cylinder 2 arranged on the bracket 1, and also includes a booster cylinder 100. The booster cylinder 100 includes a cylinder body 3 and a different-diameter piston 4. The cylinder body 3 has a small-diameter cavity 31 and a large-diameter cavity 32 connected in sequence. The different-diameter piston 4 has a small-diameter piston section 41 and a large-diameter piston section 42 connected in sequence. The large-diameter piston section 42 is located in the large-diameter cavity 32 and divides the large-diameter cavity 32 into a rodless cavity 321 and a rod cavity 322. The small-diameter piston section 41 passes through the rod cavity 322 and extends into the small-diameter cavity 31. The rodless chamber 321 is provided with a fluid inlet 323 for connecting to the brake hydraulic system. The rod chamber 322 is connected to the inlet of the hydraulic brake cylinder 2 through a first one-way valve 33 that only allows the hydraulic oil to flow from the rod chamber 322 to the hydraulic brake cylinder 2. The rod chamber 322 is connected to the hydraulic oil supply and receiving assembly 6 through the control line 5. The hydraulic brake caliper also includes an on-off control valve (not shown in the figure) for controlling the on-off of the control line 5. The on-off control valve can adopt various existing valves as long as it can realize the on-off control of the control line 5.

[0022] The hydraulic brake caliper can realize two working modes: isobaric braking and booster braking. In the isobaric braking working mode, the control line 5 is disconnected by the on-off control valve. After the brake pressure oil is passed into the rodless chamber 321, the hydraulic oil in the rod chamber 322 cannot be discharged through the control line 5. The hydraulic oil in the rod chamber 322 will open the first one-way valve 33. The hydraulic oil in the rod chamber 322 enters the inlet of the hydraulic brake cylinder 2 through the first one-way valve 33. Since the booster chamber 311 is also connected to the inlet of the hydraulic brake cylinder 2, the hydraulic pressure in the booster chamber 311 is The force, hydraulic pressure in the hydraulic brake cylinder 2 and the pressure of the brake pressure oil are the same, thereby performing isobaric braking; in the boost braking working mode, the control line 5 is connected through the on-off control valve, and after the brake pressure oil is passed into the rodless chamber 321, the hydraulic oil in the rod chamber 322 is discharged through the control line 5. Since the diameter of the small-diameter piston section 41 is smaller than the diameter of the large-diameter piston section 42, the small-diameter piston section 41 will increase the hydraulic pressure in the boost chamber 311. At this time, the hydraulic pressure in the boost chamber 311 will be greater than the pressure of the brake pressure oil, thereby performing boost braking.

[0023] The hydraulic brake caliper can realize two working modes, namely, isobaric braking and booster braking, when the brake pressure oil pressure remains unchanged, and can meet the need of the brake system to change the braking force. In addition, the booster cylinder 100, the first one-way valve 33, the control pipeline 5 with the on-off control valve, and the hydraulic oil supply and receiving assembly 6 can be arranged in the outer space of the rim, and the booster braking can be realized without increasing the size of the hydraulic brake cylinder 2, so that the hydraulic brake cylinder 2 can adapt to the installation space inside the rim, ensuring that the hydraulic brake cylinder 2 can be installed inside the rim. The hydraulic brake caliper also has the advantages of simple and compact structure, low cost, simple manufacture and assembly, and easy promotion and implementation.

[0024] In this embodiment, the cylinder body 3 and the bracket 1 are connected as an integrated structural component, and the inlet of the hydraulic brake cylinder 2 is arranged on the integrated structural component, so that the structure is simpler and more compact, and the manufacturing cost is lower.

[0025] In this embodiment, the integrated structural member is provided with a first passage 101 connecting the inlet of the hydraulic brake cylinder 2 and the rodless chamber 321, and the first one-way valve 33 is installed in the first passage 101. The first one-way valve 33 is integrated and installed in the first passage 101 of the integrated structural member, which can reduce the connection pipelines, improve the simplicity and compactness of the structure, reduce costs, and reduce failures.

[0026] In this embodiment, the boost chamber 311 is connected to the first channel 101 through the second channel 102 provided on the integral structure, and is connected to the inlet of the hydraulic brake cylinder 2 through the first channel 101. This can further reduce the number of connecting pipelines, improve the simplicity and compactness of the structure, reduce costs, and reduce failures. In other embodiments, the second channel 102 can also be directly connected to the inlet of the hydraulic brake cylinder 2.

[0027] In this embodiment, the reducing piston 4 is connected to an elastic mechanism for forcing the reducing piston 4 to move away from the small-diameter cavity 31. After the braking is completed, the reducing piston 4 is forced to move away from the small-diameter cavity 31 by the elastic mechanism, which is conducive to the stable and smooth reset of the reducing piston 4. In other embodiments, the elastic mechanism may not be provided, and the automatic reset can also be achieved by the interaction between the brake pad and the brake disc, but there may be a certain amount of drag between the brake pad and the brake disc.

[0028] In this embodiment, the elastic mechanism is a telescopic spring 7 installed in the boost chamber 311, and the two ends of the telescopic spring 7 are respectively against the inner wall of the boost chamber 311 and the small-diameter piston section 41. This elastic mechanism has a simple structure, low cost, easy manufacture and assembly, and stable and reliable operation.

[0029] In this embodiment, the different-diameter piston 4 has a connecting passage 43 connecting the boosting chamber 311 and the rodless chamber 321. The second one-way valve 34 that allows only the hydraulic oil to flow from the rodless chamber 321 to the boosting chamber 311 is installed in the connecting passage 43. The rodless chamber 321 is also provided with a push piece 35 that extends into the connecting passage 43 to force the valve core of the second one-way valve 34 to open when the different-diameter piston 4 moves in a direction away from the small-diameter chamber 31. When the different-diameter piston 4 moves in a direction away from the small-diameter chamber 31 to reset, the push piece 35 extends into the connecting passage 43 to force the valve core of the second one-way valve 34 to open, so that the connecting passage 43 connects the boosting chamber 311 and the rodless chamber 321, so that the hydraulic pressure in the hydraulic brake cylinder 2 and the brake pressure oil source are simultaneously connected to the atmosphere, which plays a role in balancing the pressure of the entire brake system, and can avoid the hydraulic brake cylinder 2 from malfunctioning due to reasons such as increased oil temperature and causing drag.

[0030] In this embodiment, the hydraulic oil supply and receiving assembly 6 is a liquid storage tank as a hydraulic oil source in the vehicle brake system. The liquid storage tank can receive the hydraulic oil discharged from the rod chamber 322 and supply the hydraulic oil to the rod chamber 322, thereby ensuring that the two working modes of isobaric braking and boost braking can be switched stably and reliably. The hydraulic oil supply and receiving assembly 6 directly uses the liquid storage tank as a hydraulic oil source in the vehicle brake system, and does not need to set up an oil storage container separately, which can improve the simplicity and compactness of the structure and reduce costs.

[0031] In this embodiment, the fluid inlet 323 is connected to the master cylinder 200 in the vehicle braking system. The master cylinder is a conventional component of the existing vehicle braking system, which provides pressurized oil during braking and connects the fluid inlet 323 to a fluid storage tank in the vehicle braking system that is connected to atmospheric pressure when braking is not required.

[0032] The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments. For those skilled in the art, improvements and changes obtained without departing from the technical concept of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A hydraulic brake caliper, comprising a bracket (1) and a hydraulic brake cylinder (2) arranged on the bracket (1), characterized in that: The invention also comprises a booster cylinder (100), wherein the booster cylinder (100) comprises a cylinder body (3) and a different-diameter piston (4), wherein the cylinder body (3) comprises a small-diameter cavity (31) and a large-diameter cavity (32) connected in sequence, wherein the different-diameter piston (4) comprises a small-diameter piston section (41) and a large-diameter piston section (42) connected in sequence, wherein the large-diameter piston section (42) is located in the large-diameter cavity (32) and divides the large-diameter cavity (32) into a rodless cavity (321) and a rod cavity (322), wherein the small-diameter piston section (41) passes through the rod cavity (322) and extends into the small-diameter cavity (31) and forms a cavity with the small-diameter cavity (31). A boost chamber (311), the boost chamber (311) is connected to the inlet of the hydraulic brake cylinder (2), the rodless chamber (321) is provided with a fluid inlet (323) for connecting to a brake hydraulic system, the rod chamber (322) is connected to the inlet of the hydraulic brake cylinder (2) via a first one-way valve (33) that only allows hydraulic oil to flow from the rod chamber (322) to the hydraulic brake cylinder (2), the rod chamber (322) is connected to a hydraulic oil supply and receiving assembly (6) via a control line (5), and the hydraulic brake caliper also includes an on-off control valve for controlling the on-off of the control line (5).

2. The hydraulic brake caliper according to claim 1, characterized in that: The cylinder body (3) and the bracket (1) are connected to form an integrated structural component, and the inlet of the hydraulic brake cylinder (2) is arranged on the integrated structural component.

3. The hydraulic brake caliper according to claim 2, characterized in that: The integrated structural component is provided with a first channel (101) communicating with the inlet of the hydraulic brake cylinder (2) and the rodless chamber (321), and the first one-way valve (33) is installed in the first channel (101).

4. The hydraulic brake caliper according to claim 3, characterized in that: The pressure-boosting chamber (311) is connected to the inlet of the hydraulic brake cylinder (2) or the first channel (101) via a second channel (102) provided on the integral structural component.

5. The hydraulic brake caliper according to claim 1, characterized in that: The different-diameter piston (4) is connected to an elastic mechanism for forcing the different-diameter piston (4) to move in a direction away from the small-diameter cavity (31).

6. The hydraulic brake caliper according to claim 5, characterized in that: The elastic mechanism is a telescopic spring (7) installed in the pressure-boosting chamber (311), and two ends of the telescopic spring (7) respectively abut against the inner wall of the pressure-boosting chamber (311) and the small-diameter piston section (41).

7. The hydraulic brake caliper according to claim 1, characterized in that: The different-diameter piston (4) has a connecting passage (43) connecting the boosting chamber (311) and the rodless chamber (321), and a second one-way valve (34) is installed in the connecting passage (43) so as to allow only the hydraulic oil to flow from the rodless chamber (321) to the boosting chamber (311). The rodless chamber (321) is also provided with a push piece (35) which extends into the connecting passage (43) and forces the valve core of the second one-way valve (34) to open when the different-diameter piston (4) moves away from the small-diameter chamber (31).

8. The hydraulic brake caliper according to any one of claims 1 to 7, characterized in that: The hydraulic oil supply and receiving assembly (6) is a liquid storage tank serving as a hydraulic oil source in a vehicle braking system.

9. The hydraulic brake caliper according to any one of claims 1 to 7, characterized in that: The liquid inlet (323) is connected to a brake master cylinder (200) in a vehicle brake system.

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