Impact type clutch

By adopting an asymmetrical arc-shaped groove and steel ball structure design in the clutch, the problems of high noise, severe wear, and unstable torque of traditional clutches are solved, achieving more labor-saving operation and higher production efficiency.

CN223635184UActive Publication Date: 2025-12-05SHANGHAI HATE IND EQUIP CO LTD
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Patent Information

Application Number
CN202520408254.0
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-03-10
Publication Date
2025-12-05
Estimated Expiration
2035-03-10

AI Technical Summary

Technical Problem

Traditional clutches are noisy, wear-prone, and have unstable output torque during operation. Loosening the threads requires multiple impacts, which affects operating comfort and safety.

Method used

An impact clutch comprising a clutch shaft, clutch seat, main shaft bushing, torque spring and torque adjusting nut assembly was designed. It adopts an asymmetrical arc-shaped groove and steel ball structure to reduce the number of impacts. The movement of the steel ball is controlled by the design of the flat part and the rising part of the arc-shaped groove, thereby reducing friction and wear.

Benefits of technology

It improves ease of operation and safety, reduces labor intensity, ensures torque stability, reduces wear and maintenance costs, and improves production efficiency.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model provides an impact type clutch, which belongs to the technical field of clutches and comprises a clutch shaft, a clutch seat, a main shaft bushing, a torque spring, a torque adjusting nut component and a ball bearing are sequentially sleeved on the clutch shaft, a plurality of arc-shaped chutes are arranged on the clutch seat, and a bump is arranged between every two adjacent arc-shaped chutes. The spindle bushing is provided with first steel ball holes with the same number as the arc-shaped sliding grooves, first steel balls are arranged in the first steel ball holes and slide in the arc-shaped sliding grooves, the arc-shaped sliding grooves are provided with gentle parts and rising parts from left to right, and when sliding clockwise, the first steel balls can smoothly slide to the rising parts from the gentle parts and impact the convex blocks, so that the convex blocks are prevented from falling off. When the first arc-shaped sliding groove slides anticlockwise, the approximately horizontal gentle part clamps the first steel ball, so that the first steel ball generates larger damping, the impact frequency of the clutch is reduced, the threaded part is prevented from being loosened by impact, and more labor is saved when the threaded part is reversely loosened.
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Description

TECHNICAL FIELD

[0001] The utility model belongs to clutch technical field, concretely relates to a impact type clutch. BACKGROUND

[0002] In mechanical transmission system, clutch as an important control device, is widely used in various mechanical equipment. The traditional clutch structure due to the inside impact block frequent knock, not only lead to tool noise is bigger, still can make impact block structure easy to wear and damage, output torque is unstable, especially when anti looseness screw, need bigger strength and multiple impact to loosen screw, this not only increases the labor intensity of operator, also can lead to inconvenient operation and low efficiency, even more likely to produce screw cannot loosen, remove the situation. In addition, under high speed rotation emergency stop condition, the counterforce arm impact of traditional clutch is big, influence operation comfort and safety.

[0003] Therefore, it is necessary to design an impact type clutch which can improve the convenience, comfort and work efficiency of operation, reduce the labor intensity of operator, and improve the performance and reliability of clutch. UTILITY MODEL CONTENTS

[0004] The utility model discloses a kind of impact type clutches, to solve the problem proposed in background art.

[0005] To achieve the above object, the utility model provides the following technical scheme:

[0006] An impact type clutch, including clutch shaft, the clutch shaft is sequentially sleeved with clutch seat, main shaft bushing, torque spring and torque adjusting nut assembly, the one end of the clutch seat towards the main shaft bushing is equipped with a plurality of arc-shaped sliding grooves, and the adjacent arc-shaped sliding grooves are provided with protrusions, the main shaft bushing is equipped with the first steel ball hole same with the number of arc-shaped sliding grooves, the first steel ball hole is equipped with first steel ball, and the first steel ball slides in the arc-shaped sliding groove;Torque spring one end is abutted in the end of the main shaft bushing, and the other end is abutted in one end of the torque adjusting nut assembly.

[0007] Further, a plurality of arc-shaped sliding grooves form a circular structure, so that the first steel ball makes circular motion around the clutch shaft in the circular structure.

[0008] Further, the arc-shaped sliding groove is provided with gentle part and rising part from left to right, the gentle part and the rising part jointly constitute the arc-shaped sliding groove, and the slope of the rising part is greater than the slope of the gentle part.

[0009] Further, the slope of the rising part is 38°-42°, and the slope of the gentle part is 2°-5°.

[0010] Further, the left side of the bump is provided with a gentle slope, and the right side is provided with a steep slope, and the slope of the gentle slope is greater than the slope of the steep slope.

[0011] Further, the ball bearing is fixed on the clutch shaft away from the one end of the clutch seat, the ball bearing is provided with a snap ring on the clutch seat at both ends, and the position of the ball bearing is limited.

[0012] Further, the inner wall of the clutch seat is provided with a first groove, the outer wall of the clutch shaft connected with the clutch seat is provided with a second groove, the first groove and the second groove are opposite and combined to form a channel, and a plurality of second steel balls are arranged in the channel and can freely slide in the channel.

[0013] Further, the inner wall of the main shaft bushing is provided with a plurality of first axial sliding grooves, the outer wall of the clutch shaft connected with the main shaft bushing is provided with a plurality of second axial sliding grooves, the first axial sliding grooves and the second axial sliding grooves are opposite and combined to form an axial sliding channel, the length direction of the axial sliding channel is parallel to the axial direction of the clutch shaft, and a third steel ball is arranged in each axial sliding channel and can freely slide in the axial sliding channel.

[0014] Further, the torque adjusting nut assembly comprises an adjusting washer and an adjusting nut, the adjusting washer is in abutment with the torque spring, and the adjusting nut is connected with the clutch shaft through threads to change the position of the adjusting washer.

[0015] Further, the abutting position of the torque spring and the main shaft bushing is provided with a gasket.

[0016] Compared with the prior art, the arc-shaped sliding groove adopts an asymmetric design, when the first steel ball slides clockwise in the arc-shaped sliding groove, the first steel ball slides from the gentle part to the rising part, so that the first steel ball smoothly impacts the bump and jumps into the gentle part of the next arc-shaped sliding groove, the gentle part has an approximately horizontal rising angle, the first steel ball can be clamped as much as possible, so that greater damping is generated, thereby reducing the number of impacts of the clutch, even without impact of the clutch, reducing or avoiding the impact to loosen the threaded part, thereby saving more labor when loosening the threaded part, without the situation of weak loosening, without multiple impacts, and without the feeling of numbness of the human arm, so that the torque of the clutch is stable, the reaction force is small, the clutch is not easy to wear or damage, the production capacity is greatly improved, and the problems of labor-intensive impact wrench tool, difficult to guarantee safety, and high production and maintenance costs in the prior art are effectively solved. BRIEF DESCRIPTION OF DRAWINGS

[0017] The accompanying drawings are used to provide further understanding of the present application, and constitute a part of the specification, and are used to explain the present application together with embodiments of the present application, and do not constitute a limitation to the present application. In the drawings:

[0018] Figure 1 It is an exploded view of the impact clutch of the present application;

[0019] Figure 2 It is a schematic view of the impact clutch of the present application;

[0020] Figure 3 It is a sectional view of the impact clutch of the present application;

[0021] Figure 4 It is a three-dimensional schematic view of the clutch seat of the present application;

[0022] Figure 5 It is a schematic view of the clutch seat of the present application;

[0023] Figure 6 It is a schematic view of the main shaft bushing of the present application;

[0024] Figure 7 It is a schematic view of the clutch shaft of the present application;

[0025] In the drawings: 1-clutch shaft, 11-second groove, 12-second axial sliding slot, 13-third steel ball, 2-clutch seat, 21-arc-shaped sliding slot, 211-gentle part, 212-rising part, 22-protruding block, 221-gentle slope, 222-steep slope, 23-first groove, 24-second steel ball, 3-main shaft bushing, 31-first steel ball hole, 32-first steel ball, 33-first axial sliding slot, 4-torque spring, 5-torque adjusting nut assembly, 51-adjusting washer, 52-adjusting nut, 6-ball bearing, 7-clasping ring, 8-washer. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0027] The clutch of the electric wrench is one of the core components, which bears the important function of controlling torque transmission and protecting the tool and workpiece. Its main role is to accurately control the torque transmission between the input shaft and the output shaft, ensure that when the set torque value is reached, the power output is quickly cut off through the automatic separation of the friction plate or mechanical structure inside the clutch, thereby effectively preventing the damage of the workpiece caused by excessive tightening. At the same time, this design can also protect the electric wrench itself from damage caused by overload, prolonging the service life of the tool. The torque transmission control of the clutch is mainly achieved by adjusting the parameters such as the gap of the clutch or the spring tension, so that the clutch can flexibly control the torque transmission according to different working requirements, ensuring accurate and stable torque output under various working conditions. For larger size electric wrenches that require larger output torque to complete the assembly and disassembly of threaded parts, impact clutches are needed to generate impact torque through impact mechanisms to meet the assembly and disassembly requirements of large size threaded parts. This impact clutch not only improves work efficiency, but also ensures stability and reliability under high intensity operation, which is an important technical guarantee for electric wrenches to face different specifications and types of threaded parts assembly and disassembly tasks.

[0028] As shown in Figures 1 to 6 The impact clutch of the present embodiment comprises a clutch shaft 1, a clutch seat 2, a main shaft bushing 3, a torque spring 4 and a torque adjusting nut assembly 5 are sequentially sleeved on the clutch shaft 1, the clutch shaft 1 and the main shaft bushing 3 adopt a split design, the clutch seat 2 is provided with three arc-shaped sliding grooves 21 at one end facing the main shaft bushing 3, a protrusion 22 is arranged between adjacent arc-shaped sliding grooves 21, the main shaft bushing 3 is provided with a same number of first steel ball 32 holes 31 as the arc-shaped sliding grooves 21, the first steel ball 32 holes 31 are provided with first steel balls 32, the first steel balls 32 slide in the arc-shaped sliding grooves 21, the arc-shaped sliding grooves 21 are provided with a gentle part 211 and a rising part 212 from left to right, the gentle part 211 and the rising part 212 jointly form the arc-shaped sliding groove 21, the slope of the rising part 212 is 40°, and the slope of the gentle part 211 is 5°; one end of the torque spring 4 abuts against the end of the main shaft bushing 3, and the other end abuts against one end of the torque adjusting nut assembly 5.

[0029] The arc-shaped sliding groove 21 is asymmetrically designed, when the first steel ball 32 slides clockwise in the arc-shaped sliding groove 21, the first steel ball 32 slides from the gentle part 211 to the rising part 212, so that the first steel ball 32 smoothly impacts the protrusion 22 and jumps into the gentle part 211 of the next arc-shaped sliding groove 21, the gentle part 211 is an upward angle close to horizontal, the first steel ball 32 can be clamped as much as possible, the first steel ball 32 is prevented from jumping back into the previous arc-shaped sliding groove 21, the arc-shaped sliding groove 21 and the first steel ball 32 rub to generate greater damping, so that the impact frequency of the clutch is reduced, even no impact of the clutch is generated, the impact to loosen the threaded part is reduced or avoided, so that more labor is saved when the threaded part is loosened, the situation that the threaded part is not loosened is avoided, the threaded part is not impacted for many times, and the numb feeling of the human arm is avoided, the torque of the clutch is stable, the reaction force is small, the clutch is not easy to wear or damage, the production capacity is greatly improved, and the problems that the impact wrench tool is labor-consuming, safety cannot be guaranteed, and production cost and maintenance cost are high in the prior art are effectively solved.

[0030] Further, the plurality of arc-shaped sliding grooves 21 form a circular structure, so that the first steel ball 32 performs circular motion around the clutch shaft 1 in the circular structure.

[0031] Further, the protrusion 22 is provided with a gentle slope 221 on the left side and a steep slope 222 on the right side, and the slope of the gentle slope 221 is greater than that of the steep slope 222.

[0032] The left side of the protrusion 22 is the gentle slope 221, and the slope is greater than that of the steep slope 222 on the right side, which helps to guide the movement of the first steel ball 32, so that it more smoothly jumps from one arc-shaped sliding groove 21 into the next sliding groove, and the impact force and movement trajectory of the steel ball can be better controlled during the sliding process, further reducing the impact frequency and intensity, and improving the stability and safety of operation.

[0033] Further, the ball bearing 6 is fixedly sleeved on the clutch shaft 1 away from the clutch seat 2, and the clutch seat 2 at both ends of the ball bearing 6 is provided with a snap ring 7 for limiting the position of the ball bearing 6.

[0034] The snap ring 7 is used for limiting the position of the ball bearing 6 to prevent displacement in the axial direction, ensuring the close fit between the ball bearing 6 and the clutch seat 2, thereby improving the stability and reliability of the entire clutch structure, avoiding the loosening or falling off of parts during high-torque transmission, and ensuring normal operation of the clutch.

[0035] Further, the inner wall circumference of the clutch seat 2 is provided with a first groove 23, the outer wall circumference of the clutch shaft 1 connected to the clutch seat 2 is provided with a second groove 11, the first groove 23 and the second groove 11 are opposite in position and combined to form a channel, and eight second steel balls 24 are arranged in the channel.

[0036] When the clutch seat 2 and the main shaft bushing 3 achieve the slip impact after the torque reaches, the clutch seat 2 continuously rotates in the circumferential direction, and the second steel ball 24 is arranged to freely roll in the channel, so that the clutch seat 2 and the clutch shaft 1 form a ball bearing 6 effect, which can be used to reduce the friction and wear between the clutch seat 2 and the clutch shaft 1, and prolong the service life of the components. In addition, the free sliding of the second steel ball 24 in the channel can provide better radial positioning and enhance the connection stability between the clutch seat 2 and the clutch shaft 1, so as to avoid the loosening or shaking of the components during the high-torque transmission process, and improve the reliability of the entire clutch.

[0037] Further, the inner wall of the main shaft bushing 3 is provided with three first axial sliding grooves 33, and the outer wall of the connection part of the clutch shaft 1 and the main shaft bushing 3 is provided with second axial sliding grooves 12 which are the same in number as the first axial sliding grooves 33. The first axial sliding grooves 33 and the second axial sliding grooves 12 are oppositely arranged and combined to form an axial sliding channel, the length direction of the axial sliding channel is parallel to the axis direction of the clutch shaft 1, and the third steel ball 13 is arranged in each axial sliding channel and freely slides in the axial sliding channel.

[0038] During the tightening process of the threaded part, the axial sliding channel and the third steel ball 13 are used to transmit the output power, and when the clutch slips after the torque reaches, the main shaft bushing 3 continuously moves axially and reciprocally, which reduces the friction and wear between the main shaft bushing 3 and the clutch shaft 1, makes the force transmission more concentrated, ensures the stability of the clutch shaft 1 during the impact, reduces the counterforce after the impact, and further increases the stability of the output torque.

[0039] Further, the torque adjusting nut assembly 5 includes an adjusting washer 51 and an adjusting nut 52 which are both sleeved on the clutch shaft 1. The adjusting washer 51 abuts against the torque spring 4, and the adjusting nut 52 is connected with the clutch shaft 1 through threads to change the position of the adjusting washer 51.

[0040] Further, the abutting part of the torque spring 4 and the main shaft bushing 3 is provided with a gasket 8.

[0041] The gasket 8 can effectively protect the end part of the main shaft bushing 3, prevent the torque spring 4 from causing wear or damage to the main shaft bushing 3 during long-term use, and improve the service life and reliability of the main shaft bushing 3. At the same time, the gasket 8 can also play a certain buffering role, reduce the vibration and noise generated by the torque spring 4 during work, and improve the stability and comfort of the clutch work.

[0042] Finally, it should be noted that: the above only for the preferred embodiments of the present application, and is not intended to limit the present application, although the foregoing embodiments of the present application have been described in detail, for the skilled in the art, it still can be modified, or for the equivalent replacement of part of the technical features of the technical solutions recorded in the foregoing embodiments. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application, shall be included within the scope of the present application.

Claims

1. An impact type clutch, characterized by: The clutch shaft is sequentially sleeved with a clutch seat, a main shaft bushing, a torque spring and a torque adjusting nut assembly, the clutch seat is provided with a plurality of arc-shaped sliding grooves at one end facing the main shaft bushing, a protrusion is arranged between adjacent arc-shaped sliding grooves, the main shaft bushing is provided with a same number of first steel ball holes as the arc-shaped sliding grooves, the first steel ball holes are provided with first steel balls, and the first steel balls slide in the arc-shaped sliding grooves; one end of the torque spring is abutted against the end of the main shaft bushing, and the other end is abutted against one end of the torque adjusting nut assembly.

2. A shock type clutch according to claim 1, characterized in that: The plurality of arc-shaped sliding grooves form a circular structure, so that the first steel balls make circular motion around the clutch shaft in the circular structure.

3. A shock type clutch according to claim 1, wherein: The arc-shaped sliding groove is provided with a gentle portion and a rising portion from left to right, the gentle portion and the rising portion jointly form the arc-shaped sliding groove, and the slope of the rising portion is greater than the slope of the gentle portion.

4. A shock type clutch according to claim 3, wherein: The slope of the rising portion is 38°-42°, and the slope of the gentle portion is 2°-5°.

5. The impact type clutch according to claim 1, characterized by: The left side of the protrusion is provided with a gentle slope, and the right side is provided with a steep slope, and the slope of the gentle slope is greater than the slope of the steep slope.

6. A shock type clutch according to claim 1, wherein: A ball bearing is fixedly sleeved on the clutch shaft away from the clutch seat, clamping rings are arranged on the clutch seat at both ends of the ball bearing, and the positions of the ball bearing are limited.

7. A shock type clutch according to claim 1, wherein: The inner wall circumference of the clutch seat is provided with a first groove, the outer wall circumference of the clutch shaft at the connection end with the clutch seat is provided with a second groove, the first groove and the second groove are opposite to each other and combined to form a channel, a plurality of second steel balls are arranged in the channel, and the second steel balls freely slide in the channel.

8. A shock type clutch according to claim 1, wherein: The inner wall of the main shaft bushing is provided with a plurality of first axial sliding grooves, the outer wall of the clutch shaft at the connection position with the main shaft bushing is provided with a same number of second axial sliding grooves as the first axial sliding grooves, the first axial sliding grooves and the second axial sliding grooves are opposite to each other and combined to form an axial sliding channel, the length direction of the axial sliding channel is parallel to the axial direction of the clutch shaft, a third steel ball is arranged in each axial sliding channel, and the third steel ball freely slides in the axial sliding channel.

9. A shock type clutch according to claim 1, wherein: The torque adjusting nut assembly comprises an adjusting washer and an adjusting nut, the adjusting washer is abutted against the torque spring, and the adjusting nut is connected with the clutch shaft through threads to change the position of the adjusting washer.

10. The impact type clutch according to claim 1, characterized by: A gasket is arranged at the abutted position of the torque spring and the main shaft bushing.