Silencing ratchet pawl structure

Abstract

The utility model discloses a kind of sound attenuation ratchet pawl structures, it is made of one sound attenuation spring and pawl body, the sound attenuation spring is arranged in pawl body one side surface, and it is integrated structure with pawl body, in the application, when pawl body slides down from the tooth of ratchet body under the action of restoring spring, the sound attenuation spring on pawl body first occurs spring collision with the tooth of ratchet body;When pawl body continues to rotate, the gap between pawl body and sound attenuation spring is eliminated and occurs elastic collision with it, and then the noise generated by collision is reduced.

Description

Technical Field

[0001] This utility model belongs to the technical field of electromechanical devices, specifically relating to a noise-reducing ratchet and pawl structure. Background Technology

[0002] For a long time, ratchet noise has been a problem that mechanical designers have hoped to solve but have not been able to.

[0003] There's a contradiction in ratchet design: to ensure reliable ratchet operation, the stiffness of the pawl's return spring must be increased. However, a higher return spring stiffness results in a higher angular velocity of the pawl's rotation, leading to a greater force from the pawl striking the ratchet teeth and increased ratchet noise. Conversely, to reduce noise, the return spring stiffness must be decreased. This slows down the pawl's response time and could even cause the ratchet to malfunction.

[0004] The magnitude of the impact force between two objects is equal to the ratio of the change in momentum of the objects during the impact to the time taken for the impact to occur. For ratchet wheels of the same type, the change in momentum is roughly the same. Therefore, the magnitude of the impact force mainly depends on the time taken for the impact to occur. The shorter the time taken, the greater the impact force, and vice versa.

[0005] When two stiff objects collide, their deformation is minimal due to their high stiffness, resulting in a very short impact time. This leads to a large impact force and a loud noise. Since both the pawl and ratchet teeth are highly rigid, this noise is significant. Therefore, we propose a noise-reducing ratchet and pawl structure. Utility Model Content

[0006] The purpose of this invention is to provide a noise-reducing ratchet and pawl structure to solve the problem mentioned in the background art that existing ratchet and pawl are rigid collisions during transmission, which generate a lot of noise during the collision process.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a noise-silencing ratchet pawl structure, which consists of a noise-silencing spring and a pawl body.

[0008] Preferably, the noise-absorbing spring is disposed on one side surface of the pawl body and is an integral structure with the pawl body.

[0009] Preferably, the noise-absorbing spring is a leaf spring.

[0010] Preferably, a groove is provided on one side surface of the pawl body, and the noise-absorbing spring is integrally formed in the groove.

[0011] Preferably, the noise-absorbing spring is used to convert the rigid collision between the pawl body and the gear teeth into an elastic collision.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] In this application, when the pawl body slides off one tooth of the ratchet body under the action of the restoring spring, the noise-reducing spring on the pawl body first collides with the tooth of the ratchet body; as the pawl body continues to rotate, the gap between the pawl body and the noise-reducing spring is eliminated and an elastic collision occurs with it, thereby reducing the noise generated by the collision. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0015] Figure 2 This is a three-dimensional structural diagram of the pawl body in this utility model;

[0016] Figure 3 for Figure 2 Enlarged structural diagram at point A;

[0017] Figure 4 A schematic diagram of an existing ratchet structure;

[0018] In the diagram: 1. Shaft; 2. Pawl body; 3. Return spring; 4. Ratchet body; 5. Gear teeth. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. 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 of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] Please see Figures 1-4 This utility model provides a technical solution: a noise-silencing ratchet pawl structure, which consists of a noise-silencing spring 7 and a pawl body 2; the noise-silencing spring 7 is disposed on one side surface of the pawl body 2 and is an integral structure with the pawl body 2; the noise-silencing spring 7 is used to convert the rigid collision between the pawl body 2 and the gear teeth 5 into an elastic collision; a rotating shaft 1 is also provided on one side of the pawl body 2, and a restoring spring 3 is sleeved on the rotating shaft 1.

[0021] Furthermore, the silencing spring 7 is a leaf spring.

[0022] Furthermore, a groove 6 is provided on one side surface of the pawl body 2, and a noise-absorbing spring 7 is integrally formed in the groove 6.

[0023] The working process of a common ratchet mechanism: When the pawl slides off one of the ratchet teeth 5 under the action of the restoring spring 3, it collides directly with the tooth 5. Since both the tooth 5 and the pawl have high rigidity, it is a rigid collision. The impact force is large. This is why commonly used ratchet mechanisms are noisy.

[0024] The working principle and usage of this utility model are as follows: When the ratchet body 4 rotates, the pawl body 2 slides off one tooth 5 of the ratchet body 4 under the action of the restoring spring 3. The noise-dampening spring 7 on the pawl body 2 first collides with the tooth 5 of the ratchet body 4. As the pawl body 2 continues to rotate, the gap between the pawl body 2 and the noise-dampening spring 7 is eliminated, and they collide elastically. The pawl body 2 then rotates one tooth 5. Because both collisions are elastic, the collision force is small, resulting in very low noise. Experiments show that the noise reduction effect is excellent.

[0025] Any structural deformation within the scope of utilizing springs to transform a rigid collision into an elastic collision is within the scope of the claims of this application.

[0026] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A noise-silencing ratchet pawl structure, characterized in that: It consists of a silencer spring (7) and a pawl body (2); The noise-absorbing spring (7) is disposed on one side surface of the pawl body (2) and is an integral structure with the pawl body (2); A groove (6) is provided on one side surface of the pawl body (2), and the noise-absorbing spring (7) is integrally formed in the groove (6).

2. The noise-silencing ratchet pawl structure according to claim 1, characterized in that: The silencer spring (7) is a leaf spring.

3. A noise-silencing ratchet pawl structure according to any one of claims 1-2, characterized in that: The silencer spring (7) is used to convert the rigid collision between the pawl body (2) and the gear tooth (5) into an elastic collision.

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