Self-locking brake pump device and brake system

Abstract

The utility model relates to the field of automobile brake technology discloses a self -locking brake pump device and brake system, and this device includes drive assembly, pump subassembly and push rod subassembly. Among them, drive assembly includes motor and transmission connection's output shaft, and pump subassembly is located drive assembly one side, and includes pump body, the pneumatic piston piece of sliding connection in the pump body and return spring, and push rod subassembly includes first push rod and second push rod, and first push rod is threaded transmission connection in one end with output shaft and is located pneumatic piston piece and is equipped with the second push rod sliding connection in first push rod. First push rod is equipped with first push -up portion, and pneumatic piston piece is equipped with second push -up portion, and first push -up portion and / or second push -up portion can push up second push rod along the axial direction to realize two ways brake. The self -locking brake pump device of the application can push up second push rod through second push -up portion to realize brake when the driving motor power interruption leads to the brake through first push -up portion and cannot be realized.

Description

Technical Field

[0001] This utility model relates to the field of automotive braking technology, specifically to a self-locking brake pump device and braking system. Background Technology

[0002] In the field of mechanical braking, the brake pump is a core component for achieving braking function, and its performance directly affects the reliability and safety of the braking system. Currently, most common brake pumps rely on hydraulic or pneumatic actuation, using external force to continuously act on the transmission components to maintain braking. This not only results in high energy consumption but also poses a risk of brake failure when power is interrupted.

[0003] In addition, although electric braking systems achieve braking through motor drive, they often have complex structures and fast response speeds: on the one hand, the motor output power needs to be transmitted to the braking actuator through a multi-stage transmission mechanism; on the other hand, the maintenance of the braking system depends on the continuous operation of the motor. When the motor or system fails, braking cannot be achieved, posing a significant safety hazard. The release of the spring can achieve a self-locking braking effect and solve the problem of brake failure. Utility Model Content

[0004] In view of the shortcomings of the prior art, the technical problem to be solved by this utility model is to provide a self-locking brake pump device and a braking system, which aims to solve the technical problem that the existing braking system cannot effectively brake when the motor fails or the power supply is interrupted.

[0005] To solve the above-mentioned technical problems, in a first aspect, this application provides a self-locking brake pump device, comprising:

[0006] A drive assembly, the drive assembly including a motor and an output shaft drivenly connected to the motor;

[0007] A pump assembly, located on one side of the drive assembly, includes a pump body, a pneumatic piston slidably connected to the pump body, and a return spring.

[0008] A push rod assembly, comprising a first push rod and a second push rod, wherein the first push rod passes through the pneumatic piston and one end is threadedly connected to the output shaft, and the second push rod is slidably connected inside the first push rod;

[0009] The first push rod is provided with a first pushing part, and the pneumatic piston is provided with a second pushing part. The first pushing part and / or the second pushing part can push the second push rod along the axial direction.

[0010] In one possible implementation, the pneumatic piston isolates the pump body to form a first chamber and a second chamber, and the return spring is disposed in the first chamber and abuts against the two end walls of the first chamber respectively.

[0011] In one possible implementation, the pump body is provided with a first air inlet and a second air inlet, the first air inlet being connected to the second chamber and the second air inlet being connected to the first chamber.

[0012] In one possible implementation, the pump body includes a first pump body portion and a second pump body portion, the drive assembly is connected to the first pump body portion, the pneumatic piston is disposed inside the first pump body portion, and the second push rod is provided with a sliding portion, the sliding portion being slidably connected to the second pump body portion.

[0013] In one possible implementation, the diameter of the first pump body is larger than the diameter of the second pump body.

[0014] In one possible implementation, the first pushing part and / or the second pushing part are disposed in the second pump body part and are capable of moving along the axial direction to push the sliding part.

[0015] In one possible implementation, a seal is also included, which is disposed on the inner wall of the second pump body.

[0016] Secondly, this application also provides a braking system, including a self-locking brake pump device as described in the first aspect and a brake caliper, the brake caliper including a caliper seat and a movable caliper slidably connected to the caliper seat, and the second push rod being used to push the movable caliper to achieve braking.

[0017] Compared to existing technologies, the self-locking brake pump device of this utility model includes a drive assembly, a pump assembly, and a push rod assembly. The drive assembly includes a motor and an output shaft connected to it. The pump assembly, located on one side of the drive assembly, includes a pump body, a pneumatic piston slidably connected within the pump body, and a return spring. The push rod assembly includes a first push rod and a second push rod. The first push rod passes through the pneumatic piston and one end is threadedly connected to the output shaft. The second push rod is slidably connected within the first push rod. The first push rod has a first pushing portion, and the pneumatic piston has a second pushing portion. The first and / or second pushing portions can push the second push rod along the axial direction to achieve braking in two ways. The self-locking brake pump device of this application can achieve braking by pushing the second push rod through the first and / or second pushing portions. When the drive motor power is interrupted, preventing braking through the first pushing portion, braking can be achieved by pushing the second push rod through the second pushing portion. Attached Figure Description

[0018] Figure 1 This is a cross-sectional view of a self-locking brake pump device in one embodiment of this application;

[0019] Figure 2This is a three-dimensional structural diagram of a self-locking brake pump device in one embodiment of this application. Detailed Implementation

[0020] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0021] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "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," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0022] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integrated connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can also refer to the internal connection of two components; and they can refer to a wireless connection or a wired connection. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. Example 1

[0023] like Figure 1-2 This utility model provides a self-locking brake pump device, including a drive assembly 100, a pump assembly 200, and a push rod assembly 300.

[0024] The drive assembly 100 includes a motor 120 and an output shaft 110 that is connected to the motor 120 in a transmission manner. The motor 120 serves as a power source, converting electrical energy into mechanical energy and outputting power through the output shaft 110 to provide driving force for the operation of the entire brake pump device.

[0025] The pump assembly 200 is disposed on one side of the drive assembly 100 and includes a pump body 210, a pneumatic piston 220 slidably connected within the pump body 210, and a return spring 230. The pneumatic piston 220 forms a first chamber 211 and a second chamber 212 by isolating the pump body 210. The return spring 230 is disposed in the first chamber 211 and abuts against the end walls of the first chamber 211. The pump body 210 is provided with a first air inlet 213 and a second air inlet 214. The first air inlet 213 communicates with the second chamber 212, and the second air inlet 214 communicates with the first chamber 211. The second air inlet 214, which communicates with the first chamber 211, is mainly used for inflating to assist the return spring 230 in rapid reset.

[0026] In this embodiment, the pump body 210 includes a first pump body portion 215 and a second pump body portion 216. The drive assembly 100 is connected to the first pump body portion 215. The pneumatic piston 220 is disposed inside the first pump body portion 215, and the diameter of the first pump body portion 215 is larger than the diameter of the second pump body portion 216.

[0027] Optionally, the first pump body 215 and the second pump body 216 can be an integrally formed structure or a detachable structure.

[0028] The push rod assembly 300 includes a first push rod 310 and a second push rod 320. The first push rod 310 passes through the pneumatic piston 220 and is threadedly connected at one end to the output shaft 110. The second push rod 320 is slidably connected inside the first push rod 310.

[0029] In this embodiment of the application, the first push rod 310 is provided with a first pushing part 311, and the pneumatic piston 220 is provided with a second pushing part 221. The first pushing part 311 and / or the second pushing part 221 can push the second push rod 320 along the axial direction.

[0030] The second push rod 320 is provided with a sliding part 321, which is slidably connected to the second pump body part 216. The first push part 311 and / or the second push part 221 are provided in the second pump body part 216 and can move along the axial direction to push the sliding part 321.

[0031] In this embodiment of the application, the self-locking brake pump device further includes a seal 400, which is disposed on the inner wall of the second pump body 216 to improve the sealing performance of the device and prevent gas leakage.

[0032] Motor braking process: Upon receiving a braking signal, the motor 120 starts and begins to operate. The torque output by the motor 120 is transmitted to the output shaft 110, which is connected to it, causing the output shaft 110 to rotate. Since one end of the first push rod 310 is connected to the output shaft 110 by a threaded drive, the rotational motion of the output shaft 110 is converted into linear movement of the first push rod 310 along the axial direction, thereby causing the first pushing part 311 to push the sliding part 321, realizing the motor braking action.

[0033] Pneumatic braking process: The pump assembly controls the movement of the pneumatic piston 220 through air intake and exhaust, and works in conjunction with the return spring 230 to achieve the self-locking and unlocking cycle of pneumatic braking. Specifically, when the second chamber 212 is inflated, the return spring 230 is compressed, and the second pushing part 221 moves away from the sliding part 321. At this time, the pneumatic braking forms a self-locking effect, that is, pneumatic braking is not performed at this time. When the second chamber 212 is deflated and the first chamber 211 is inflated, the return spring 230 quickly returns to its original position, and the second pushing part 221 approaches and pushes the sliding part 321. At this time, the pneumatic braking forms an unlocking effect, that is, pneumatic braking is performed at this time.

[0034] Based on this, the self-locking brake pump device of this application embodiment can achieve braking by pushing the second push rod through the first push part and / or the second push part. When the power of the drive motor is interrupted and braking cannot be achieved through the first push part, braking can be achieved by pushing the second push rod through the second push part. Example 2

[0035] This utility model also provides a braking system, including a self-locking brake pump device as described in Embodiment 1 and a brake caliper (not shown in the figure). The brake caliper includes a caliper seat and a movable caliper slidably connected to the caliper seat. The second push rod 320 of the self-locking brake pump device is used to push the movable caliper so that the two calipers are closed to achieve braking.

[0036] Obviously, the above are only preferred embodiments of this utility model and do not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the contents of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A self-locking brake pump device, characterized in that, include: A drive assembly (100) includes a motor (120) and an output shaft (110) that is driveably connected to the motor (120). Pump assembly (200), which is located on one side of drive assembly (100), includes pump body (210), pneumatic piston (220) slidably connected in pump body (210) and return spring (230). A push rod assembly (300) includes a first push rod (310) and a second push rod (320). The first push rod (310) passes through the pneumatic piston (220) and one end is threadedly connected to the output shaft (110). The second push rod (320) is slidably connected inside the first push rod (310). The first push rod (310) is provided with a first pushing part (311), and the pneumatic piston (220) is provided with a second pushing part (221). The first pushing part (311) and / or the second pushing part (221) can push the second push rod (320) along the axial direction.

2. The self-locking brake pump device as described in claim 1, characterized in that, The pneumatic piston (220) isolates the pump body (210) to form a first chamber (211) and a second chamber (212). The return spring (230) is located in the first chamber (211) and abuts against the two end walls of the first chamber (211).

3. The self-locking brake pump device as described in claim 2, characterized in that, The pump body (210) is provided with a first air inlet (213) and a second air inlet (214). The first air inlet (213) is connected to the second chamber (212), and the second air inlet (214) is connected to the first chamber (211).

4. The self-locking brake pump device as described in claim 1, characterized in that, The pump body (210) includes a first pump body part (215) and a second pump body part (216). The drive assembly (100) is connected to the first pump body part (215). The pneumatic piston (220) is disposed in the first pump body part (215). The second push rod (320) is provided with a sliding part (321), and the sliding part (321) is slidably connected to the second pump body part (216).

5. The self-locking brake pump device as described in claim 4, characterized in that, The diameter of the first pump body part (215) is larger than the diameter of the second pump body part (216).

6. The self-locking brake pump device as described in claim 4, characterized in that, The first pushing part (311) and / or the second pushing part (221) are provided on the second pump body part (216) and can move along the axial direction to push the sliding part (321).

7. The self-locking brake pump device as described in claim 4, characterized in that, It also includes a seal (400) disposed on the inner wall of the second pump body (216).

8. A braking system, characterized in that, Includes the self-locking brake pump device and brake caliper as described in any one of claims 1-7, wherein the brake caliper includes a caliper seat and a movable caliper slidably connected to the caliper seat, and the second push rod (320) is used to push the movable caliper to achieve braking.

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