Novel ratchet wheel type automobile brake adjusting arm device

Abstract

The utility model discloses a novel ratchet wheel type automobile brake adjusting arm device, relates to the technical field of automobile brakes, and solves the problems that when an adjusting arm is used, after the position of a ratchet wheel after rotation is limited by a limiting device, the limiting device is pressed between sawteeth of the ratchet wheel, and the limiting device is prone to being damaged due to long-time use. The device comprises an adjusting arm and a ratchet wheel, a lower shell is fixedly installed at the right end of the adjusting arm, an upper shell is fixedly installed at the upper end of the lower shell through a bolt, the ratchet wheel is arranged in the upper shell, and the ratchet wheel is arranged in the upper shell. The side wall of the upper end of the interior of the upper shell is in threaded connection with a screw rod, the lower end of the screw rod is slidably sleeved with a pawl, the upper shell and the lower shell can be detached, the internal pawl can be conveniently taken out and replaced, and the service life of the adjusting arm can be prolonged.

Description

Technical Field

[0001] This utility model relates to the technical field of automobile brakes, specifically a novel ratchet-type automobile brake adjusting arm device. Background Technology

[0002] The ratchet-type automotive brake adjusting arm is a key component of the automotive braking system. It is mainly used to automatically adjust the clearance between the brake shoes and the brake drum to ensure that the braking system always maintains good performance.

[0003] A search revealed Chinese patent publication number CN210128032U, which discloses a ratchet-pawl type automatic brake clearance adjusting arm locking device. This device effectively solves the problem of brake fatigue and excessive braking distance caused by the worm gear mechanism's self-locking capability exceeding the resistance torque of the brake, leading to brake failure and excessive braking distance. The solution includes a ratchet mounted on the worm gear, fitted with a pawl. A shaft extending from the automatic brake clearance adjusting arm is fixed to the pawl, and a limiting seat is mounted on one end of the shaft. The ratchet and pawl work together to prevent the worm gear from rotating counterclockwise when subjected to a large resistance torque during braking, while also allowing the automatic brake clearance adjusting arm to be used as a manual brake clearance adjusting arm. Pulling the shaft outward disengages the pawl from the ratchet, facilitating manual adjustment of the gap between the brake pads and the brake drum. The limiting seat ensures the pawl is precisely engaged between the teeth of the ratchet.

[0004] However, when the adjusting arm is in use, the position of the ratchet after rotation is limited by the limiting device. The limiting device is pressed between the teeth of the ratchet, which will also cause pressure on the limiting device. Over time, the surface of the limiting device will be worn and deformed, which will reduce the safety of the adjusting arm. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this utility model provides a novel ratchet-type automotive brake adjusting arm device. This solves the problem that when the adjusting arm is in use, the position of the ratchet after rotation is limited by a limiting device. However, the limiting device is pressed against the teeth of the ratchet, which causes wear and deformation of the limiting device over time, reducing the safety of the adjusting arm.

[0006] To achieve the above objectives, this utility model is implemented through the following technical solution: A novel ratchet-type automotive brake adjusting arm device includes an adjusting arm and a ratchet. A lower housing is fixedly installed at the right end of the adjusting arm, and an upper housing is fixedly installed at the upper end of the lower housing by bolts. The ratchet is disposed inside the upper housing. A screw is threadedly connected to the upper side wall inside the upper housing, and a pawl is slidably sleeved at the lower end of the screw. A connecting block is fastened to the right side wall inside the upper housing by bolts, and a tension spring is fixedly installed between the connecting block and the pawl. The pawl is engaged in the tooth groove of the ratchet.

[0007] Preferably, a worm gear is rotatably connected inside the lower housing, and a worm is rotatably connected inside the adjusting arm. The interior of the lower housing is connected to the interior of the adjusting arm. The worm is driven by the worm gear. The worm gear is located at the lower end of the ratchet. A connecting pipe is fixedly installed between the worm gear and the ratchet to facilitate the rotation of the ratchet.

[0008] Preferably, the outer diameters of the upper and lower housings are equal, and the inner diameters are also equal, which facilitates the secure installation of the internal worm gear and ratchet.

[0009] Preferably, the width of the pawl is equal to the width of the ratchet, thereby enabling the ratchet to be stably positioned.

[0010] Preferably, the ratchet is not connected to the interior of the upper housing and is positioned below the top of the adjusting arm, thereby facilitating a stable position for the ratchet.

[0011] Preferably, the connecting block is arc-shaped, and the sidewall of the connecting block fits into the inner sidewall of the upper housing, so that the position of the connecting block is completely stable after installation.

[0012] This utility model provides a novel ratchet-type automotive brake adjusting arm device. It has the following beneficial effects:

[0013] 1. This novel ratchet-type automotive brake adjusting arm device allows for the disassembly of the upper and lower housings during use, facilitating the removal and replacement of the internal ratchet pawl, thereby extending the service life of the adjusting arm.

[0014] 2. This novel ratchet-type automotive brake adjusting arm device, when used, ensures that the pawl is securely installed during installation through the cooperation between the screw and the connecting block, thus guaranteeing that the pawl can be disassembled while also being securely installed. Attached Figure Description

[0015] Figure 1This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the disassembly structure of the upper and lower shells of this utility model;

[0017] Figure 3 This utility model Figure 2 Enlarged structural diagram of section A.

[0018] In the diagram, 1. Adjusting arm; 2. Upper housing; 3. Lower housing; 4. Worm gear; 5. Worm wheel; 6. Connecting block; 7. Ratchet; 8. Connecting pipe; 9. Tensioning spring; 10. Pawl; 11. Screw. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0020] Example 1

[0021] Please see Figure 1-3 This utility model provides a novel ratchet-type automotive brake adjusting arm device, including an adjusting arm 1 and a ratchet 7. A lower housing 3 is fixedly installed on the right end of the adjusting arm 1, and an upper housing 2 is fixedly installed on the upper end of the lower housing 3 by bolts. The ratchet 7 is disposed inside the upper housing 2. A screw 11 is threadedly connected to the upper side wall inside the upper housing 2, and a pawl 10 is slidably sleeved on the lower end of the screw 11. A connecting block 6 is fastened to the right side wall inside the upper housing 2 by bolts, and a tension spring 9 is fixedly installed between the connecting block 6 and the pawl 10. The pawl 10 is engaged in the tooth groove of the ratchet 7. A worm gear 5 is rotatably connected inside the lower housing 3, and a worm 4 is rotatably connected inside the adjusting arm 1. The interior of the lower housing 3 is connected to the interior of the adjusting arm 1. The worm 4 and the worm gear 5 are connected in a continuous manner. The transmission connection includes a worm gear 5 located at the lower end of the ratchet 7, with a connecting pipe 8 fixedly installed between the worm gear 5 and the ratchet 7. The outer diameters of the upper housing 2 and the lower housing 3 are equal, as are their internal diameters. The width of the pawl 10 is equal to the width of the ratchet 7. The ratchet 7 is not connected to the interior of the upper housing 2 and is positioned below the top of the adjusting arm 1. The connecting block 6 is arc-shaped, and its sidewall fits against the inner sidewall of the upper housing 2. When disassembling the pawl 10, the upper housing 2 and the lower housing 3 are first disassembled, allowing the pawl 10 to easily move with the upper housing 2. Then, the connecting block 6 is disassembled, followed by the screw 11, facilitating the removal and replacement of the pawl 10.

[0022] It should be noted that in this embodiment, when using the ratchet-type automotive brake adjusting arm device, such as Figure 1-3 As shown, when disassembling the pawl 10, the upper housing 2 and the lower housing 3 are first disassembled, which allows the pawl 10 to move along with the upper housing 2. Then, the connecting block 6 is disassembled, and the screw 11 is disassembled, which allows the pawl 10 to be disassembled easily and is convenient for replacement.

[0023] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It will be apparent to those skilled in the art that this utility model is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description, and thus all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this utility model. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0024] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A new type of ratchet wheel automobile brake adjusting arm device, characterized in that: Including the adjusting arm (1) and ratchet (7), the right end of the adjusting arm (1) is fixedly installed with the lower shell (3), the upper end of the lower shell (3) is fixedly installed with the upper shell (2) through the bolt, the ratchet (7) is arranged in the inside of the upper shell (2), the upper end side wall in the inside of the upper shell (2) is threadedly connected with the screw rod (11), and the lower end of the screw rod (11) is slidably sleeved with the pawl (10), the right end side wall in the inside of the upper shell (2) is fixedly installed with the connecting block (6) through the bolt, and the connecting block (6) and the pawl (10) are fixedly installed with the tension spring (9), the pawl (10) is clamped into the tooth groove of the ratchet (7).

2. A new type of ratchet wheel automobile brake adjusting arm device according to claim 1, characterized in that: The inside of the lower shell (3) is rotatably connected with the worm gear (5), the inside of the adjusting arm (1) is rotatably connected with the worm (4), the inside of the lower shell (3) is communicated with the inside of the adjusting arm (1), the worm (4) is in transmission connection with the worm gear (5), the worm gear (5) is arranged at the lower end of the ratchet (7), and the worm gear (5) and the ratchet (7) are fixedly installed with the connecting pipe (8).

3. A new type of ratchet wheel automobile brake adjusting arm device according to claim 1, characterized in that: The outer diameters of the upper shell (2) and the lower shell (3) are equal, and the interiors are equal.

4. A new type of ratchet wheel automobile brake adjusting arm device according to claim 1, characterized in that: The width of the pawl (10) is equal to the width of the ratchet (7).

5. The new type of ratchet wheel automobile brake adjusting arm device according to claim 1, characterized in that: The ratchet (7) is not connected with the inside of the upper shell (2), and is lower than the top position of the adjusting arm (1).

6. A new type of ratchet wheel automobile brake adjusting arm device according to claim 1, characterized in that: The connecting block (6) is arc-shaped, and the side wall of the connecting block (6) is attached to the inside side wall of the upper shell (2).

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