Hydraulic brake piston and hydraulic brake

Abstract

An outer opening and an outer bottom plate are arranged at the top and the bottom of an outer piston barrel respectively, an oil passing hole is formed in the outer bottom plate in a penetrating mode, and a cavity is formed in the position, corresponding to the oil passing hole, of the inner side of the outer bottom plate; according to the hydraulic brake piston and the hydraulic brake, efficient braking can be completed without using skills or electronic chips; when the upper pump is pressurized, due to the existence of the oil passing hole, pressure oil enters the cavity, the pressure of the pressure oil is buffered to a certain degree, the pressure oil further presses the inner piston barrel to the upper cover, the pressure oil is further buffered, and therefore when the upper pump is pressurized, the braking pressure is gradually released, and wheels cannot be locked. And when the upper pump stops pressurizing, the elastic force provided by the elastic piece resets the inner piston barrel, the pressure oil is discharged at the moment to increase the pressure borne by the outer piston barrel, the braking pressure is increased (the pressure is automatically increased for the second time), and finally the vehicle is stably stopped.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic brake structure, and in particular to a hydraulic brake piston and a hydraulic brake. Background Technology

[0002] Hydraulic disc brakes are devices used in vehicle braking systems, primarily in bicycles, motorcycles, and automobiles. They transmit braking force through hydraulic transmission, providing highly efficient braking performance. For example, in a bicycle's hydraulic disc brake, when the rider presses the brake lever, brake fluid is compressed through hydraulic lines, transmitting pressure to the brake caliper. The piston inside the caliper pushes the brake pads to clamp the disc, generating friction that slows or stops the wheel. The hydraulically driven piston achieves the braking effect, offering advantages such as strong and even braking force, less susceptibility to weather and environmental conditions, easy operation, and simple adjustment.

[0003] Hydraulic disc brakes are a highly efficient and reliable braking system widely used in vehicles and industrial equipment. Their working principle is based on hydraulic transmission and friction braking, providing strong braking force and stable performance. Depending on the application, the design and materials of hydraulic disc brakes may vary, but their core function remains the same: ensuring safety and improving handling performance.

[0004] In conventional designs, hydraulic pressure acts on the piston relatively quickly, which poses a risk of seizure. However, by incorporating relevant structures to buffer the effect of hydraulic pressure, the working pressure may not meet the required level. Utility Model Content

[0005] The main purpose of this utility model is to provide a hydraulic brake piston and a hydraulic brake device, which aims to solve the problem that the hydraulic pressure applied to the piston is too rapid and may cause it to seize up. However, by setting up a related structure to buffer the effect of hydraulic pressure, the working pressure may not be up to standard.

[0006] To achieve the above objectives, this utility model provides a hydraulic brake piston, comprising:

[0007] The outer piston barrel is barrel-shaped, with an outer opening at the top and an outer bottom plate at the bottom. An oil passage hole is provided on the outer bottom plate, and a cavity is provided on the inner side of the outer bottom plate corresponding to the position of the oil passage hole.

[0008] An inner piston barrel is disposed inside the outer piston barrel and is arranged in the same direction. The top and bottom of the inner piston barrel are an inner opening and an inner bottom plate, respectively.

[0009] The upper cover support ring is disposed inside the outer piston barrel and sleeved between the outer wall of the inner piston barrel and the inner wall of the outer piston barrel;

[0010] The top cover is installed inside the inner piston barrel and seals the inner piston barrel;

[0011] An elastic element is compressed and disposed between the upper cover and the inner bottom plate;

[0012] When the inner bottom plate of the inner piston barrel is in contact with the outer bottom plate of the outer piston barrel, the inner piston barrel and the top cover are in clearance fit in the height direction.

[0013] Furthermore, a fixed shaft is provided at the bottom of the inner bottom plate, the fixed shaft is inserted into the oil passage hole, and an annular gap is provided between the outer wall of the fixed shaft and the inner wall of the oil passage hole.

[0014] Furthermore, when the inner piston barrel is in the position closest to the upper cover, the fixed shaft separates from the oil passage hole.

[0015] Furthermore, the oil passage is flared outward in a direction away from the outer opening on the outer side of the outer bottom plate.

[0016] Furthermore, the upper cover is fixed to the outer piston barrel by a snap ring.

[0017] Furthermore, the upper cover support ring is a rubber ring with a rectangular cross-section.

[0018] Furthermore, the lower part of the inner piston barrel in the height direction corresponds to the outer piston barrel, and the upper part of the inner piston barrel in the height direction corresponds to the upper cover support ring.

[0019] Furthermore, the inner side of the outer bottom plate is provided with a plurality of exhaust grooves that lead to the cavity in a ring around the portion corresponding to the inner bottom plate.

[0020] Furthermore, an O-ring is fixed between the outer wall of the upper cover and the inner wall of the outer piston barrel.

[0021] Furthermore, the hydraulic brake piston also includes a filter element, which is fixed to the outer piston barrel and covers the oil passage hole.

[0022] This utility model also provides a hydraulic brake, including the aforementioned hydraulic brake piston.

[0023] The hydraulic brake piston and hydraulic brake device provided by this utility model can achieve efficient braking without the need for special skills or electronic chips. When the upper pump pressurizes, the presence of the oil passage allows pressurized oil to enter the cavity, thus buffering the oil pressure to a certain extent. Further pressurized oil then pushes the inner piston barrel against the upper cover, further buffering the pressure. This allows the braking pressure to be gradually released during upper pump pressurization, preventing wheel lock-up. When the upper pump stops pressurizing, the elastic force provided by the elastic element resets the inner piston barrel. At this time, the pressurized oil is discharged, increasing the pressure on the outer piston barrel, thus increasing the braking pressure (a secondary automatic pressure increase), ultimately achieving a smooth stop for the vehicle. Attached Figure Description

[0024] Figure 1 This is a schematic diagram (first perspective) of the hydraulic brake piston of the first embodiment of this utility model;

[0025] Figure 2 This is a schematic diagram (second perspective) of the hydraulic brake piston of the first embodiment of this utility model;

[0026] Figure 3 This is a cross-sectional schematic diagram of the hydraulic brake piston of the first embodiment of this utility model (the elastic element is in the reset state);

[0027] Figure 4 This is a cross-sectional schematic diagram of the hydraulic brake piston of the first embodiment of this utility model (the elastic element is in a compressed state);

[0028] Figure 5 This is a schematic diagram (section) of the inner piston barrel in the hydraulic brake piston of the first embodiment of this utility model;

[0029] Figure 6 This is a schematic diagram (cross-section) of the outer piston barrel in the hydraulic brake piston of the first embodiment of this utility model.

[0030] Figure 7 This is a schematic diagram (section) of the outer piston barrel in the hydraulic brake piston of the second embodiment of this utility model.

[0031] Figure 8 This is a cross-sectional schematic diagram of the hydraulic brake piston of the second embodiment of this utility model (the elastic element is in the reset state);

[0032] Figure 9 This is a cross-sectional schematic diagram of the hydraulic brake piston of the second embodiment of this utility model (the elastic element is in a compressed state);

[0033] Figure 10 This is a schematic diagram of the outer piston barrel in the hydraulic brake piston of the third embodiment of this utility model. Detailed Implementation

[0034] It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0035] Those skilled in the art will understand that, unless specifically stated otherwise, the singular forms “a,” “an,” “the,” “the,” “the,” and “the” used herein may also include the plural forms. It should be further understood that the term “comprising” as used in this specification means the presence of the stated features, integers, steps, operations, elements, units, modules, and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, units, modules, components, and / or groups thereof. It should be understood that when we say an element is “connected” or “coupled” to another element, it can be directly connected or coupled to the other element, or there may be intermediate elements. Furthermore, “connected” or “coupled” as used herein can include wireless connection or wireless coupling. The term “and / or” as used herein includes all or any units and all combinations of one or more associated listed items.

[0036] It will be understood by those skilled in the art that, unless otherwise defined, all terms used herein (including technical and scientific terms) have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. It should also be understood that terms such as those defined in general dictionaries should be understood to have the same meaning as in the context of the prior art and should not be interpreted in an idealized or overly formal sense unless specifically defined as herein.

[0037] Reference Figures 1 to 9 In one embodiment of this utility model, a hydraulic brake piston includes:

[0038] The outer piston barrel 100 is in the shape of a barrel, with an outer opening 110 at the top and an outer bottom plate 120 at the bottom. An oil passage hole 121 is provided on the outer bottom plate 120, and a cavity 122 is provided on the inner side of the outer bottom plate 120 corresponding to the position of the oil passage hole 121.

[0039] An inner piston barrel 200 is disposed inside the outer piston barrel 100 and is arranged in the same direction. The top and bottom of the inner piston barrel 200 are an inner opening 210 and an inner bottom plate 220, respectively.

[0040] The upper cover support ring 300 is disposed inside the outer piston barrel 100 and sleeved between the outer wall of the inner piston barrel 200 and the inner wall of the outer piston barrel 100;

[0041] The top cover 400 is installed inside the inner piston barrel 200 and closes the inner piston barrel 200.

[0042] An elastic element 500 is compressed and disposed between the upper cover 400 and the inner bottom plate 220;

[0043] When the inner bottom plate 220 of the inner piston barrel 200 is in contact with the outer bottom plate 120 of the outer piston barrel 100, the inner piston barrel 200 and the upper cover 400 are in clearance fit in the height direction.

[0044] In existing technologies, conventional designs apply hydraulic pressure to the piston relatively quickly, which poses a risk of seizure. However, by incorporating relevant structures to buffer the effect of hydraulic pressure, the working pressure may not meet the required level.

[0045] The hydraulic brake piston provided by this utility model has a barrel-shaped outer piston barrel 100 with an outer opening 110 at the top and an outer base plate 120 at the bottom. The outer piston barrel 100 is installed in the hydraulic cylinder of the hydraulic brake and performs a sliding action, while a brake pad is installed on one side of the outer opening 110. An oil passage hole 121 is provided on the outer base plate 120, and a cavity 122 is provided on the inner side of the outer base plate 120 corresponding to the position of the oil passage hole 121. The shape of the oil passage hole 121 can be designed to further enhance the technical effect, which will be detailed in subsequent embodiments. The minimum diameter of the oil passage hole 121 is set according to the size of the hydraulic brake piston. If the diameter of the oil passage hole 121 is too large, the hydraulic oil tends to enter the outer piston barrel 100, which will weaken the overall driving effect of the outer piston barrel 100.

[0046] The inner piston barrel 200 is disposed inside the outer piston barrel 100 and is arranged in the same direction. The top and bottom of the inner piston barrel 200 are an inner opening 210 and an inner bottom plate 220, respectively.

[0047] The upper cover support ring 300 is disposed inside the outer piston barrel 100 and sleeved between the outer wall of the inner piston barrel 200 and the inner wall of the outer piston barrel 100. The upper cover support ring 300 is used to support the subsequent upper cover 400. The inner wall of the upper cover support ring 300 fits against the outer wall of the inner piston barrel 200. The upper cover support ring 300 guides and seals the movement of the inner piston barrel 200, thereby making the position of the inner piston barrel 200 more accurate during sliding, and improving the working performance and durability of the inner piston barrel 200.

[0048] The top cover 400 is installed inside the inner piston barrel 200 and seals the inner piston barrel 200. The top cover 400 can be fixed in various ways, such as by a retaining spring 600 or other structures, and there is no specific limitation.

[0049] The elastic element 500 is compressed and positioned between the upper cover 400 and the inner bottom plate 220. The elastic element 500 can be a coil spring or a disc spring, etc.

[0050] When the inner bottom plate 220 of the inner piston barrel 200 is in contact with the outer bottom plate 120 of the outer piston barrel 100, the inner piston barrel 200 and the upper cover 400 are in clearance fit in the height direction.

[0051] During operation, the outer piston barrel 100 is installed in the hydraulic cylinder of the hydraulic brake, performing a sliding action. Brake pads are installed on one side of the outer opening 110, thus achieving braking and release actions during the sliding of the outer piston barrel 100. When the upper pump pressurizes, pressurized oil acts on the outer base plate 120 of the outer piston barrel 100, causing the outer piston barrel 100 to slide. Due to the presence of the oil passage 121, pressurized oil enters the cavity 122, thus buffering the pressure to a certain extent. Further pressurized oil pushes the inner piston barrel 200 against the upper cover 400, further buffering the pressure. This achieves a gradual release of braking pressure during upper pump pressurization (initial buffering pressure application effect), preventing the wheels from stopping abruptly and avoiding skidding or falling to the ground. When the upper pump stops pressurizing, the elastic force provided by the elastic element 500 resets the inner piston barrel 200. At this time, pressurized oil is discharged, increasing the pressure on the outer piston barrel 100, increasing the braking pressure (secondary automatic pressure increase), ultimately achieving a smooth stop for the vehicle. The hydraulic brake piston provided by this invention enables efficient braking without the need for special skills or electronic chips.

[0052] In summary, efficient braking can be achieved without the need for special skills or electronic chips. During upper pump pressurization, the presence of the oil passage 121 allows pressurized oil to enter the cavity 122, where the pressure is buffered to a certain extent. Further pressurized oil then pushes the inner piston barrel 200 against the upper cover 400, further buffering the pressure. This allows the braking pressure to be gradually released during upper pump pressurization, preventing wheel lock-up. When upper pump pressurization stops, the elastic force provided by the elastic element 500 resets the inner piston barrel 200. At this time, pressurized oil is discharged, increasing the pressure on the outer piston barrel 100, thus increasing the braking pressure (a secondary automatic pressure increase), ultimately achieving a smooth stop for the vehicle.

[0053] Reference Figures 7 to 9 In one embodiment, a fixed shaft 230 is provided at the bottom of the inner bottom plate 220, the fixed shaft 230 is inserted into the oil passage hole 121, and an annular gap is provided between the outer wall of the fixed shaft 230 and the inner wall of the oil passage hole 121.

[0054] In this embodiment, the thickness of the annular gap is relatively small, resulting in greater resistance to the hydraulic oil flow and preventing the outer piston barrel 100 from moving slowly. A fixed shaft 230 is installed at the bottom of the inner piston barrel, cooperating with the oil passage hole 121 to achieve multiple functions. First, the fixed shaft 230 effectively prevents foreign objects from clogging the oil passage hole 121; second, the bottom end of the fixed shaft 230 directly resists the pressure oil, allowing the elastic element 500 to introduce pressure earlier; finally, as the fixed shaft 230 gradually separates from the oil passage hole 121, the resistance to hydraulic oil flow decreases, and the hydraulic oil is buffered within the outer piston barrel 100, improving the buffering effect. The cross-section of the fixed shaft 230 is not limited and can be rectangular, elliptical, or circular, etc. The thickness of the annular gap is greater than 0.01 mm; otherwise, the hydraulic oil will have difficulty passing through the annular gap. The upper limit of the annular gap size is related to the size of the hydraulic brake piston. In a typical case, the thickness of the annular gap is between 0.01 mm and 2 mm.

[0055] In one embodiment, when the inner piston barrel 200 is in the position closest to the upper cover 400, the fixed shaft 230 is separated from the oil passage 121.

[0056] In this embodiment, considering that when the hydraulic oil pressure at the bottom of the outer piston barrel 100 is too high, the annular gap between the outer wall of the fixed shaft 230 and the inner wall of the oil passage hole 121 is insufficient to provide a strong oil passage capacity, the above separation characteristic is set. When the inner piston barrel 200 is in a higher position, the oil passage capacity is improved, and the buffering effect is enhanced. Specifically, the inner piston barrel 200 is not limited to being in the position closest to the top cover 400 when the fixed shaft 230 disengages from the oil passage hole 121; the inner piston barrel 200 can disengage from the oil passage hole 121 at a relatively high position, and the upper end of the corresponding oil passage hole 121 can have a chamfered structure, thereby improving the smoothness of the fixed shaft 230 entering the oil passage hole 121.

[0057] Reference Figures 1 to 6 In one embodiment, the oil passage 121 is flared outward in a direction away from the outer opening 110 on the outer side of the outer base plate 120.

[0058] In this embodiment, the outer side of the oil passage 121 is set in a funnel shape, so that the hydraulic oil is guided by the funnel-shaped structure at the oil passage 121, thereby improving the efficiency of entering the interior, avoiding the situation that the initial buffer pressure application stage is too slow, and also avoiding the situation that the secondary automatic pressure increase stage is too fast.

[0059] Reference Figures 1 to 6 In one embodiment, the upper cover 400 is fixed to the outer piston barrel 100 by a snap ring 600.

[0060] In this embodiment, a simple method for fixing the top cover 400 is provided, which has the advantages of quick installation and simple maintenance.

[0061] In one embodiment, the upper cover support ring 300 is a rubber ring with a rectangular cross-section.

[0062] In this embodiment, the upper cover support ring 300 is set as a rubber ring, thereby providing support for the upper cover 400. A rectangular cross-section provides better support. The matching snap ring 600 is used to limit the position of the upper cover 400, while the upper cover support ring 300 provides the supporting effect.

[0063] Reference Figure 3 In one embodiment, the lower part of the inner piston barrel 200 in the height direction corresponds to the outer piston barrel 100, and the upper part of the inner piston barrel 200 in the height direction corresponds to the upper cover support ring 300.

[0064] In this embodiment, the inner piston barrel 200 is prevented from being completely surrounded by the upper cover support ring 300, which would generate excessive friction and affect the smooth sliding of the inner piston barrel 200.

[0065] In one embodiment, the elastic element 500 comprises a plurality of stacked disc springs.

[0066] In this embodiment, the elastic element 500 is limited to multiple disc springs that can provide a relatively stable elastic force within a short stroke. The number of disc springs can be adjusted according to actual conditions.

[0067] Reference Figure 10 In one embodiment, the inner side of the outer bottom plate 120 is provided with a plurality of exhaust grooves 123 that connect to the cavity 122, corresponding to a portion of the inner bottom plate 220.

[0068] In this embodiment, the exhaust function is accomplished through the exhaust groove 123.

[0069] Reference Figures 1 to 6 In one embodiment, an O-ring 700 is fixed between the outer wall of the upper cover 400 and the inner wall of the outer piston barrel 100.

[0070] In this embodiment, the O-ring 700 provides a superior sealing effect between the upper cover 400 and the outer piston barrel 100, thereby preventing impurities (liquid, solid, or gaseous) on the outside of the upper cover 400 from entering the inside of the upper cover 400. The O-ring 700 can be fitted onto the outer peripheral wall of the upper cover 400 or the inner peripheral wall of the outer piston barrel 100, and there are no specific limitations.

[0071] Reference Figures 1 to 6In one embodiment, the hydraulic brake piston further includes a filter 800, which is fixed to the outer piston barrel 100 and covers the oil passage 121.

[0072] In this embodiment, the hydraulic oil is filtered by the filter element 800 to prevent impurities from affecting the normal operation of structures such as the oil passage 121. The filter element 800 can be a mesh structure formed by a polymer or a limiting cloth material, depending on what achieves the filtration effect.

[0073] In one embodiment, a fixing groove is provided on the outer piston barrel 100 corresponding to the position of the oil passage hole 121, and the filter sheet 800 is embedded in the fixing groove.

[0074] In this embodiment, for example, the filter sheet 800 is a mesh structure formed of polyurethane or PVC, and a fixing groove covering the oil passage hole 121 is provided on the outer piston barrel 100, so that the filter sheet 800 can be fixed in the fixing groove for convenient fixation.

[0075] This utility model also provides a hydraulic brake, including the aforementioned hydraulic brake piston.

[0076] In this embodiment, a hydraulic brake is provided, which has the aforementioned hydraulic brake piston and has a superior braking effect. Specifically, it achieves the effect of initial buffer pressure application and secondary automatic pressure increase.

[0077] In summary, the hydraulic brake piston and hydraulic brake provided by this utility model can achieve efficient braking without the need for special skills or electronic chips. When the upper pump pressurizes, due to the presence of the oil passage 121, pressurized oil enters the cavity 122, thus the pressure of the pressurized oil is buffered to a certain extent. Further pressurized oil pushes the inner piston barrel 200 against the upper cover 400, further buffering the pressurized oil. This allows the braking pressure to be gradually released during the pressurization of the upper pump, preventing the wheels from locking up. When the pressurization of the upper pump stops, the elastic force provided by the elastic element 500 resets the inner piston barrel 200. At this time, the pressurized oil is discharged, increasing the pressure on the outer piston barrel 100, thus increasing the braking pressure (secondary automatic pressure increase), ultimately achieving a smooth stop for the vehicle.

[0078] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural or procedural transformations made based on the content of the present utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present utility model.

Claims

1. A hydraulic brake piston characterized in that, include: The outer piston barrel is barrel-shaped, with an outer opening at the top and an outer bottom plate at the bottom. An oil passage hole is provided on the outer bottom plate, and a cavity is provided on the inner side of the outer bottom plate corresponding to the position of the oil passage hole. An inner piston barrel is disposed inside the outer piston barrel and is arranged in the same direction. The top and bottom of the inner piston barrel are an inner opening and an inner bottom plate, respectively. The upper cover support ring is disposed inside the outer piston barrel and sleeved between the outer wall of the inner piston barrel and the inner wall of the outer piston barrel; The top cover is installed inside the inner piston barrel and seals the inner piston barrel; An elastic element is compressed and disposed between the upper cover and the inner bottom plate; When the inner bottom plate of the inner piston barrel is in contact with the outer bottom plate of the outer piston barrel, the inner piston barrel and the top cover are in clearance fit in the height direction.

2. The hydraulic brake piston of claim 1, wherein, A fixed shaft is provided at the bottom of the inner bottom plate, and the fixed shaft is inserted into the oil passage hole. An annular gap is provided between the outer wall of the fixed shaft and the inner wall of the oil passage hole.

3. The hydraulic brake piston of claim 2 wherein, When the inner piston barrel is in the position closest to the upper cover, the fixed shaft separates from the oil passage hole.

4. The hydraulic brake piston according to claim 1, characterized in that, The oil passage is located on the outer side of the outer bottom plate and expands outward in a funnel shape in the direction away from the outer opening.

5. The hydraulic brake piston according to any one of claims 1 to 4, characterized in that, The top cover is fixed to the outer piston barrel by a snap ring.

6. The hydraulic brake piston according to any one of claims 1 to 4, characterized in that, The upper cover support ring is a rubber ring with a rectangular cross-section.

7. The hydraulic brake piston according to any one of claims 1 to 4, characterized in that, The lower part of the inner piston barrel in the height direction corresponds to the outer piston barrel, and the upper part of the inner piston barrel in the height direction corresponds to the upper cover support ring.

8. The hydraulic brake piston according to any one of claims 1 to 4, characterized in that, The inner side of the outer bottom plate is provided with a plurality of exhaust grooves that lead to the cavity in a ring around the portion corresponding to the inner bottom plate.

9. The hydraulic brake piston according to any one of claims 1 to 4, characterized in that, The hydraulic brake piston also includes a filter element, which is fixed to the outer piston barrel and covers the oil passage hole.

10. A hydraulic brake, characterized in that, Includes the hydraulic brake piston as described in any one of claims 1 to 9.

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