A disc brake assembly with hand and foot brake linkage

Abstract

The utility model relates to the field of vehicle brake disc brake assembly that hand and foot brake linkage is linked to, including upper pump assembly, lower pump assembly and linkage valve. Upper pump assembly includes hand brake and upper pump, and hand brake is connected with upper pump and controls upper pump to provide brake fluid, and lower pump assembly includes at least a pair of friction piece and at least one piston, and linkage valve includes casing, valve core, oil inlet, oil outlet, shift lever and return spring, and the valve cavity is arranged in the casing, and valve core sets up in the valve cavity and can axially slide, and oil inlet communicates with the space in the valve cavity, and oil inlet is connected between upper pump through oil pipe, and oil outlet communicates with the space in the valve cavity, and oil outlet is connected between lower pump assembly through oil pipe, and shift lever is used for linkage with foot brake pedal, and shift lever has the build -up pressure portion that contacts with the one end of valve core away from oil outlet, the utility model discloses the realization hand, foot can be independent or common drive, and extra disc brake execution brake is saved, and system simplifies, and cost is saved.

Description

Technical Field

[0001] This utility model relates to the field of vehicle braking, and in particular to a disc brake assembly that links hand and foot brakes. Background Technology

[0002] In existing technologies, handbrakes and foot brakes in two-wheeled, three-wheeled, and electric four-wheeled vehicles are typically independent: the handbrake drives the front disc brake via an upper pump, while the foot brake drives the rear disc brake via a mechanical lever or a separate lower pump. If a large braking force is required simultaneously, the driver must use both hands and feet, which is cumbersome and prone to uneven braking force distribution. Some models have attempted to hydraulically connect the foot brake and rear disc brake, but this cannot directly utilize the existing front disc brake, resulting in system redundancy and increased costs. Therefore, a simple, interconnected solution is needed that allows both the handbrake and foot brake to drive the same disc brake individually or jointly without adding an additional disc brake. Utility Model Content

[0003] This utility model addresses the shortcomings of existing technologies by providing a disc brake assembly that links hand and foot brakes.

[0004] The present invention solves the above-mentioned technical problems through the following technical solution: A disc brake assembly with hand and foot brake linkage includes an upper pump assembly, a lower pump assembly, and a linkage valve.

[0005] The upper pump assembly includes a handbrake and an upper pump. The handbrake is connected to the upper pump and controls the upper pump to supply brake fluid. The lower pump assembly includes at least one pair of friction pads and at least one piston. The linkage valve includes a housing, a valve core, an inlet, an outlet, a lever, and a return spring. The housing has a valve chamber, and the valve core is axially slidably disposed in the valve chamber for pressure building. The inlet communicates with the space inside the valve chamber and is connected to the upper pump via an oil pipe. The outlet communicates with the space inside the valve chamber and is connected to the lower pump assembly via an oil pipe. The lever is used to link with the foot brake pedal and has a pressure building part that contacts the end of the valve core away from the outlet. The return spring is connected to the valve core, which is disposed on the side of the valve chamber away from the outlet. The two ends of the return spring abut against the valve core and the cavity wall of the valve chamber, respectively. When the upper pump supplies brake fluid and / or the pressure building part pushes the valve core towards the outlet, the outlet hydraulically drives the piston through the oil pipe to press the friction pads to clamp the brake disc. It allows for independent or combined actuation by hands and feet, eliminating the need for additional disc brakes, simplifying the system and saving costs.

[0006] Preferably, the lever and the housing are hinged together with a hinge shaft as the central axis. The lever has a force-receiving part that is linked to the foot brake pedal, with the force-receiving part and the pressure-building part located on both sides of the hinge shaft. The lever adopts a hinged lever structure, with the force-receiving part and the pressure-building part located on both sides of the hinge shaft. The force of the foot brake pedal is amplified by the lever, reducing the driver's pedaling force.

[0007] Preferably, the oil outlet is located in the middle of the housing. This reduces the volume from the valve chamber to the oil outlet, resulting in a faster pressure build-up response.

[0008] Preferably, the inlet and valve chamber have a pressure-building channel and a return channel that connect the internal space of the valve chamber, with the return channel located on the outlet side relative to the pressure-building channel. The movement of the valve spool allows for a free stroke, preventing the valve spool movement from immediately building pressure and applying it to the lower pump, thus making braking safer.

[0009] Preferably, the valve core is provided with a sealing element at least on the side near the oil outlet. When the valve core is not subjected to external force from the brake fluid or lever, the sealing element is located between the pressure building channel and the return channel.

[0010] Preferably, the housing is provided with a limiting groove. When the lever is not under the force of the foot brake pedal, it is housed within the limiting groove. When the lever is under the force of the foot brake pedal, it swings away from the limiting groove. The limiting groove locks the lever in the driving state, preventing accidental activation that could cause brake drag and improving driving safety.

[0011] This utility model, by adopting the above technical solution, has significant technical effects: Beneficial effects: The handbrake hydraulic pressure and foot brake mechanical force are integrated in the same linkage valve. The two inputs share the same oil outlet and lower pump, resulting in a simple structure and high component reuse rate. While retaining the traditional handbrake function, the foot brake linkage is added, which can be used alone or in combination, improving braking efficiency and driving convenience. Moreover, no additional disc brake is required to perform braking, reducing costs. This solves the problem that existing technologies require independent calipers or independent hydraulic circuits for handbrakes and foot brakes, resulting in complex systems and high costs. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a structural schematic diagram of the present invention from another angle; Figure 3 This is a schematic diagram of the linkage valve. Figure 4 This is a top view of the linkage valve; Figure 5 yes Figure 4 Cross-sectional view of BB in the middle.

[0013] The parts referred to by the numbers in the above attached diagrams are as follows: 11. Handbrake; 12. Upper pump; 2. Lower pump assembly; 21. Friction plate; 3. Linkage valve; 31. Housing; 311. Limiting groove; 32. Valve chamber; 33. Valve core; 34. Oil inlet; 341. Pressure building channel; 342. Return channel; 35. Oil outlet; 36. Lever; 361. Pressure building part; 362. Hinge shaft; 363. Force-bearing part; 37. Return spring; 38. Sealing element; 4. Oil pipe; 5. Brake disc. Detailed Implementation

[0014] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.

[0015] Example 1 A disc brake assembly that links hand and foot brakes, such as Figure 1 As shown, it includes an upper pump assembly, a lower pump assembly 2, and a linkage valve 3.

[0016] like Figure 2 As shown, the upper pump assembly includes a handbrake 11 and an upper pump 12. The handbrake 11 is connected to the upper pump 12 and controls the upper pump 12 to supply brake fluid. The lower pump assembly 2 includes at least a pair of friction plates 21 and at least one piston. The linkage valve 3 includes a housing 31, a valve core 33, an inlet 34, an outlet 35, a lever 36, and a return spring 37. A valve chamber 32 is provided inside the housing 31. The valve core 33 is axially slidably disposed in the valve chamber 32 for pressure building. The inlet 34 communicates with the space inside the valve chamber 32 and is connected to the upper pump 12 via an oil pipe 4. The outlet 35 communicates with the space inside the valve chamber 32. The oil outlet 35 is connected to the lower pump assembly 2 via an oil pipe 4; the lever 36 is used to link with the foot brake pedal, and the lever 36 has a pressure-building part 361 that contacts the end of the valve core 33 away from the oil outlet 35; the return spring 37 is connected to the valve core 33, and the valve core 33 is located on the side of the valve cavity 32 away from the oil outlet 35. The two ends of the return spring 37 abut against the valve core 33 and the cavity wall of the valve cavity 32, respectively; when the upper pump 12 provides brake fluid and / or the pressure-building part 361 pushes the valve core 33 to move towards the oil outlet 35, the oil outlet 35 hydraulically drives the piston through the oil pipe 4 to press the friction plate 21 to clamp the brake disc 5.

[0017] like Figure 3 As shown, the lever 36 is hinged to the housing 31 with the hinge shaft 362 as the central axis. The lever 36 has a force-receiving part 363 that is linked to the foot brake pedal. The force-receiving part 363 and the pressure-building part 361 are located on both sides of the hinge shaft 362, respectively.

[0018] The oil outlet 35 is located in the middle of the housing 31.

[0019] like Figure 4-5As shown, there is a pressure building channel 341 and a return channel 342 connecting the oil inlet 34 and the valve chamber 32, with the return channel 342 located on the side of the oil outlet 35 relative to the pressure building channel 341.

[0020] The valve core 33 is provided with a sealing element 38 at least on the side near the oil outlet 35. When the valve core 33 is not subjected to external force from the brake fluid or the lever 36, the sealing element 38 is located between the pressure building channel 341 and the return channel 342.

[0021] The housing 31 is provided with a limiting groove 311. When the lever 36 is not subjected to the force of the foot brake pedal, it is housed in the limiting groove 311. When the lever 36 is subjected to the force of the foot brake pedal, it swings away from the limiting groove 311.

[0022] Handbrake independent braking When the handbrake 11 is squeezed, the upper pump 12 outputs brake fluid. The brake fluid enters the valve chamber through the oil pipe 4 from the oil inlet 34, through the pressure building channel 341 and the return channel 342. The brake fluid pushes the valve core 33 to move towards the oil outlet 35 until the sealing element 38 moves and blocks the return channel. Then the brake fluid enters and builds pressure on the lower pump assembly through the oil pipe 4. The piston of the lower pump assembly 2 pushes the friction plate 21 to clamp the brake disc 5 to achieve braking.

[0023] Foot brake independent braking When the foot brake pedal is pressed, the force-bearing part 363 swings, and the lever 36 rotates around the hinge shaft 362, causing the pressure-building part 361 to push the valve core 33 to move axially. The subsequent pressure-building and clamping process is the same as the handbrake braking alone.

[0024] Braking with both hands and feet When the handbrake and foot brake are activated simultaneously, the valve core 33 is subjected to both hydraulic pressure and mechanical thrust, which can build up higher hydraulic pressure more quickly and obtain greater braking force.

[0025] Release state After the handbrake and foot brake are released, the return spring 37 pushes the valve core 33 to reset, the sealing element 38 returns to the space between the pressure building channel 341 and the return channel 342, the brake fluid in the upper pump flows back through the return channel 342 and connects with the oil tank, the friction plate 21 returns to its original position, and the brake is released.

[0026] In the description of this utility model, it should be understood that the terms "center," "length," "width," "thickness," "upper," "lower," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0027] In summary, the above description is only a preferred embodiment of the present utility model. All equivalent changes and modifications made within the scope of the patent application of the present utility model shall fall within the scope of the patent of the present utility model.

Claims

1. A disc brake assembly with hand and foot brake linkage, characterized in that, include: The upper pump assembly includes a handbrake (11) and an upper pump (12), the handbrake (11) being connected to the upper pump (12) and controlling the upper pump (12) to supply brake fluid; The lower pump assembly (2) includes at least a pair of friction plates (21) and at least one piston; Linkage valve (3), including The housing (31) has a valve chamber (32) inside it; The valve core (33) is axially slidably disposed within the valve cavity (32) for pressure building; The oil inlet (34) is connected to the space inside the valve chamber (32), and the oil inlet (34) is connected to the upper pump (12) through the oil pipe (4); Oil outlet (35) is connected to the space inside the valve chamber (32). Oil outlet (35) is connected to the lower pump assembly (2) through oil pipe (4). The lever (36) is used to link with the foot brake pedal. The lever (36) has a pressure-building part (361) that contacts the end of the valve core (33) away from the oil outlet (35). The return spring (37) is connected to the valve core (33), which is located in the valve cavity (32) on the side away from the oil outlet (35). The two ends of the return spring (37) abut against the valve core (33) and the cavity wall of the valve cavity (32) respectively. When the upper pump (12) provides brake fluid and / or the pressure build-up section (361) pushes the valve core (33) to move toward the oil outlet (35), the oil outlet (35) hydraulically drives the piston through the oil pipe (4) to press the friction plate (21) to clamp the brake disc (5).

2. The disc brake assembly with hand and foot brake linkage according to claim 1, characterized in that: The lever (36) and the housing (31) are hinged together with the hinge shaft (362) as the central axis. The lever (36) has a force-receiving part (363) that is linked to the foot brake pedal. The force-receiving part (363) and the pressure-building part (361) are located on both sides of the hinge shaft (362).

3. The disc brake assembly with hand and foot brake linkage according to claim 1, characterized in that: The oil outlet (35) is located in the middle of the housing (31).

4. A disc brake assembly with hand and foot brake linkage according to claim 3, characterized in that: There is a pressure building channel (341) and a return channel (342) connecting the oil inlet (34) and the valve chamber (32), with the return channel (342) located on the side of the oil outlet (35) relative to the pressure building channel (341).

5. A disc brake assembly with hand and foot brake linkage according to claim 4, characterized in that: The valve core (33) is provided with a sealing element (38) at least on the side near the oil outlet (35). When the valve core (33) is not subjected to external force from the brake fluid or the lever (36), the sealing element (38) is located between the pressure building channel (341) and the return channel (342).

6. A disc brake assembly with hand and foot brake linkage according to claim 1 or 2, characterized in that: The housing (31) is provided with a limiting groove (311). When the lever (36) is not subjected to the force of the foot brake pedal, it is housed in the limiting groove (311). When the lever (36) is subjected to the force of the foot brake pedal, it swings away from the limiting groove (311).

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