Breaking type centrifugal ratchet wheel clutch mechanism
By designing a split centrifugal ratchet clutch mechanism, the structure of the detent center of gravity deviates from the center of the circle, combined with spring torque and centrifugal torque, high torque transmission is achieved, wear and noise is reduced, failure rate is reduced, and component structure is simplified.
Patent Information
- Application Number
- CN202423133174.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-18
- Publication Date
- 2025-07-18
- Estimated Expiration
- 2034-12-18
AI Technical Summary
The existing ratchet clutch has problems such as high wear, high noise, complex structure and prone to failure when transmitting torque and speed changes.
A split-type centrifugal ratchet clutch mechanism is designed, adopting an inner ferrule, outer ferrule and pawl structure. The center of gravity of the pawl deviates from the center of the circle, and disengages and engages through the resistance of the centrifugal moment on the pawl and the spring moment. The outer ferrule is equipped with an arc groove and a guide slope, which simplifies the composition of the parts.
High torque transmission is achieved, reducing wear and noise, reducing failure rate, and simplifying disassembly and assembly operations.
Smart Images
Figure CN223120446U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a segmented centrifugal ratchet clutch mechanism. Background Art
[0002] As a kind of overrunning clutch, the ratchet clutch is an important component for power transmission and separation between a prime mover and a working machine or between a driving shaft and a driven shaft inside a machine. It is a device with a self-clutching function by utilizing the speed change or rotation direction change of the main and driven parts. Compared with a conventional friction clutch, it has a higher torque transmission and a faster response speed. The ratchet clutch is widely used in many fields such as bicycles, automobiles, robots, aerospace, etc. In this regard, we propose a segmented centrifugal ratchet clutch mechanism to provide a new design scheme for the development of clutches. Summary of the Utility Model
[0003] The purpose of the utility model is to solve the above-mentioned existing problems, thereby providing a segmented centrifugal ratchet clutch mechanism.
[0004] The above purpose is achieved by the following technical solutions:
[0005] A segmented centrifugal ratchet clutch mechanism, which comprises: an inner race, an outer race and a plurality of pawls. A plurality of pawl grooves arranged in a circle are formed in the inner race. Each pawl is connected to a pawl groove through a pin. Through holes are formed at one ends of each pawl on the outer circumference of the inner race. A piston with a spring is inserted into the through holes to press the pawls against the outer race and engage with arc grooves on the outer race.
[0006] In the segmented centrifugal ratchet clutch mechanism, a straight rectangular hole is formed on the side surface of the pawl. The center line of the straight rectangular hole deviates from the center of the pawl, so that the center of gravity of the pawl deviates from the center.
[0007] In the segmented centrifugal ratchet clutch mechanism, the outer race is of a circular ring structure, and a plurality of arc grooves are uniformly arranged in a circle on its inner ring surface. A guiding inclined surface is arranged between two adjacent arc grooves.
[0008] In the segmented centrifugal ratchet clutch mechanism, the number of the pawls is three. Advantageous Effects
[0009] 1. The structure of the utility model is simple. Through the pawl structure with the center of gravity deviated from the center, the pawl disengages from and re-engages with the engagement by the moment of the centrifugal force on the pawl resisting the acting moment of the spring, and it has the ability to transmit a higher torque.
[0010] 2. Compared with traditional friction clutches, the wear and frictional noise during the overrunning process of the present utility model are reduced.
[0011] 3. The present utility model has fewer components, thereby reducing the failure rate and avoiding cumbersome disassembly and assembly operations. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 is a perspective view of the present utility model;
[0013] Figure 2 is a cross-sectional view of the present utility model;
[0014] In the figure: 1, inner race; 2, piston; 3, pin; 4, outer race; 5, pawl; 6, spring; 7, pawl groove; 8, rectangular hole; 9, arc groove; 10, guiding inclined surface; 11, through hole. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
[0015] Referring to Figure 1 - Figure 2 , a break-type centrifugal ratchet clutch mechanism, which comprises: an inner race 1, an outer race 4 and a plurality of pawls 5. A plurality of pawl grooves 7 arranged in a circumferential manner are formed in the inner race. Each pawl groove is connected with a pawl through a pin 3. There are three pawls. Through holes 11 are formed in the outer circumference of the inner race at one end of each pawl. A piston 2 with a spring 6 is inserted into the through hole to press the pawl tightly against the outer race and engage with an arc groove 9 on the outer race. Torque is transmitted from the outer race 4 through the pawl 5 to the pin 3 and the inner race 1;
[0016] In the break-type centrifugal ratchet clutch mechanism, a rectangular hole 8 is formed in the side surface of the pawl. The center line of the rectangular hole deviates from the center of the pawl, so that the center of gravity of the pawl deviates from the center.
[0017] In the break-type centrifugal ratchet clutch mechanism, the outer race is of a ring structure, and a plurality of arc grooves 9 are uniformly arranged in a circumferential manner on its inner ring surface. A guiding inclined surface 10 is arranged between two adjacent arc grooves.
[0018] Since the rotation center of the designed pawl 5 is not consistent with its center of gravity. When the clutch reaches the set speed K, the moment of the centrifugal force acting on the pawl 5 is greater than the moment of the acting force of the spring 6, and the pawl disengages from the engagement - the clutch is disengaged.
[0019] When the speed drops and decreases to the set speed K, the acting moment of the centrifugal force acting on the pawl 5 is less than the acting moment of the spring 6. The pawl 5 rotates towards the engagement trend, and when the back of the pawl contacts the convex point of the main outer race, the clutch resumes engagement.
Claims
1. A break-type centrifugal ratchet clutch mechanism, characterized in that: It consists of: an inner race, an outer race and a plurality of pawls. A plurality of pawl grooves arranged in a circle are formed in the inner race. Each pawl is connected to a corresponding pawl groove through a pin. Through holes are formed in the outer circumference of the inner race at one end of each pawl. A piston with a spring is inserted into each through hole to tightly press the pawl against the outer race and engage with an arc groove on the outer race.
2. The sectional centrifugal ratchet clutch mechanism according to claim 1, characterized in that: A straight rectangular hole is formed in the side surface of the pawl, and the center line of the straight rectangular hole deviates from the center of the pawl, causing the center of gravity of the pawl to deviate from the center.
3. The sectional centrifugal ratchet clutch mechanism according to claim 2, characterized in that: The outer race is of a ring structure, and a plurality of arc grooves are uniformly arranged in a circle on its inner ring surface. A guiding inclined surface is provided between two adjacent arc grooves.
4. A segmented centrifugal ratchet clutch mechanism according to claim 3, characterized in that: There are three pawls.