CN220839937U

CN220839937U - Clutch structure and electric wrench thereof

Info

Publication number: CN220839937U
Application number: CN202322740647.5U
Authority: CN
Inventors: 杜红峰
Original assignee: Jinhua Bochao Tools Co ltd
Current assignee: Jinhua Bochao Tools Co ltd
Priority date: 2023-10-11
Filing date: 2023-10-11
Publication date: 2024-04-26
Anticipated expiration: 2033-10-11

Abstract

The application relates to a clutch structure and an electric wrench thereof, wherein the scheme comprises a clutch shaft which is arranged in a hollow way, one end of the clutch shaft, which faces to a clutch flywheel, is provided with a clutch disc, and a plurality of bulges are uniformly arranged on the clutch disc at intervals along the circumferential direction of a center hole; the elastic sleeve is sleeved on the outer ring of the clutch shaft, one end of the elastic sleeve is abutted against the clutch disc, and the other end of the elastic sleeve is abutted against the spacer sleeve; the spacer bush is sleeved on the outer ring of the clutch shaft, one end of the spacer bush is abutted against the elastic bush, and the other end of the spacer bush is abutted against the bearing of the inner ring of the abutting bush; the butt joint sleeve is sleeved on the outer ring of the clutch shaft and is positioned at one end of the clutch shaft far away from the clutch flywheel; the clutch flywheel, one end towards the clutch shaft is provided with a butt joint shaft, the other end is connected with an output shaft, and the butt joint shaft is provided with grooves corresponding to the protrusions one by one. The clutch structure has the advantages of remarkably prolonging the service life of the clutch structure, along with simpler structure, further reducing the cost and being convenient for maintenance.

Description

Clutch structure and electric wrench thereof

Technical Field

The application relates to the technical field of wrenches, in particular to a clutch structure and an electric wrench thereof.

Background

The impact wrench and the like belong to electromechanical integrated tools, and are mainly applied to the steel structure installation industry and used for fixing the impact wrench of the high-strength bolt. The locking device is widely used for locking or disassembling the bolt with large torque force, effectively reduces manpower and improves the automation level.

However, most of clutch structures adopted by the existing electric wrenches or pneumatic wrenches realize clutch functions through structures of torque springs and steel balls, such as a pneumatic fixed torque wrench disclosed in CN218462043U, however, the springs can fail under long-time high-strength use, so that the clutch functions of the quick wrench are good and bad, and maintenance and replacement are needed.

Therefore, a clutch structure without torque spring and steel column and an electric wrench thereof are needed to solve the problems in the prior art.

Disclosure of utility model

The application aims to solve the problems in the prior art and provide a clutch structure and an electric wrench thereof.

In order to achieve the purpose of the application, the application adopts the following technical scheme: the clutch structure comprises:

The clutch shaft is arranged in a hollow way, one end of the clutch shaft, which faces the clutch flywheel, is provided with a clutch disc, and a plurality of bulges are uniformly arranged on the clutch disc along the circumferential direction of the central hole at intervals;

The elastic sleeve is sleeved on the outer ring of the clutch shaft, one end of the elastic sleeve is abutted against the clutch disc, and the other end of the elastic sleeve is abutted against the spacer sleeve;

the spacer bush is sleeved on the outer ring of the clutch shaft, one end of the spacer bush is abutted against the elastic bush, and the other end of the spacer bush is abutted against the bearing of the inner ring of the abutting bush;

The butt joint sleeve is sleeved on the outer ring of the clutch shaft and is positioned at one end of the clutch shaft far away from the clutch flywheel;

The clutch flywheel, one end towards the clutch shaft is provided with a butt joint shaft, the other end is connected with an output shaft, and the butt joint shaft is provided with grooves corresponding to the protrusions one by one.

Further, the height of the protrusions is less than the depth of the grooves. The possibility of clamping stagnation is reduced, and the reliability of the clutch structure can be improved. If the protrusions completely fill the grooves, they may be subjected to more friction and stress during rotation, easily causing wear and failure. By designing the difference in the dimensions of the protrusions and the recesses, this risk can be reduced.

Further, inclined surfaces are arranged at the left end and the right end of each protrusion, and corresponding inclined surfaces are arranged in each groove. The performance, stability and durability of the clutch structure can be improved so that the protrusions can move out of the grooves beyond the torque limit.

Further, the cross section of each protrusion and the cross section of each groove are isosceles trapezoids. A more uniform force transmission and contact may be provided, making the clutching configuration more stable.

Further, a positioning bearing is arranged on the outer ring of the butt joint shaft. The butt joint shaft can be conveniently installed in the shell, and certain positioning and position fixing effects are achieved.

Further, a buckling groove is arranged on the butt joint sleeve. The buckling groove can be conveniently connected with the motor.

Further, the inner wall of the clutch shaft far away from one end of the clutch disc is provided with a butt joint groove. The butt joint groove is arranged to facilitate the connection with the main shaft of the motor.

Further, a gap is arranged between the left and right side surfaces of the groove and the left and right side surfaces of the bulge. The aim is to reduce the possibility of jamming and to improve the reliability of the clutch structure.

Further, the number of the grooves and the protrusions is 3-8.

The electric wrench comprises the clutch structure, a shell and a motor arranged in the shell, wherein a main shaft of the motor is in driving connection with a clutch shaft of the clutch structure.

Compared with the prior art, the application has the following beneficial effects:

1. The novel clutch structure adopted by the application can reduce the dependence on the torque spring and the steel ball, thereby improving the reliability and durability of the electric wrench. The clutch is realized by different mechanical principles (after the clutch shaft is subjected to torque exceeding a certain size, the protrusion of the clutch shaft slides out of the groove of the butt joint shaft, so that the clutch shaft is separated from the groove, and when the clutch shaft continuously rotates, the protrusion can enter the groove again to realize connection when moving to the next groove due to the elasticity of the elastic sleeve), so that the problem of failure of the spring is avoided.

2. The application further simplifies the existing spring steel ball type clutch structure, and can further reduce the cost and the maintenance difficulty.

Drawings

FIG. 1 is an exploded view of the clutch structure of the present application;

FIG. 2 is a schematic view of the clutch structure of the present application;

FIG. 3 is a cross-sectional view of the clutch structure of the present application;

FIG. 4 is a schematic view of the clutch shaft structure of the present application;

Fig. 5 is a schematic view of the clutch structure mounted on the electric wrench.

In the figure, 1, a clutch structure; 2. a motor; 3. a housing; 11. a clutch shaft; 111. a clutch plate; 112. a protrusion; 113. a butt joint groove; 13. an elastic sleeve; 14. a spacer bush; 15. a butt joint sleeve; 151. a buckling groove; 16. a clutch flywheel; 161. a butt joint shaft; 162. a groove; 17. an output shaft; 18. and positioning the bearing.

Detailed Description

The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. All other embodiments, which are derived by a person skilled in the art based on the embodiments of the application, fall within the scope of protection of the application.

It will be appreciated by those skilled in the art that in the present disclosure, the terms "longitudinal," "transverse," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," etc. refer to an orientation or positional relationship based on that shown in the drawings, which is merely for convenience of description and to simplify the description, and do not refer to or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus the above terms should not be construed as limiting the present application.

Example 1

As shown in fig. 1 to 5, the clutch structure includes:

The clutch shaft 11 is arranged in a hollow way, one end facing the clutch flywheel 16 is provided with a clutch disc 111, and the clutch disc 111 is uniformly provided with a plurality of bulges 112 at intervals along the circumferential direction of the central hole;

in this embodiment, the clutch shaft 11 is used for connecting the spindle of the motor 2 inside the electric wrench, and can transmit power, for example, a docking slot 113 is provided on the inner wall of the clutch shaft 11 far away from one end of the clutch disc 111, the docking slot 113 can be conveniently connected with the spindle of the motor 2, and a corresponding bump can be provided on the spindle of the motor 2, so as to realize coaxial rotary connection.

An elastic sleeve 13 sleeved on the outer ring of the clutch shaft 11, one end of the elastic sleeve is abutted against the clutch disc 111, and the other end is abutted against the spacer sleeve 14;

In this embodiment, the elastic sleeve 13 may be made of various elastic materials, such as elastic plastics, elastic composite materials, polyurethane (PU), etc., and is not limited herein, as long as it has a longer service life than the spring, and is intended to replace the structure of the spring and the steel ball.

The spacer bush 14 is sleeved on the outer ring of the clutch shaft 11, one end of the spacer bush is abutted against the elastic sleeve 13, and the other end of the spacer bush is abutted against the bearing of the inner ring of the abutting sleeve 15;

In the present embodiment, the spacer 14 aims at providing a contact surface for the elastic sleeve 13, and can also be used for fixing the distance between the elastic sleeve 13 and the clutch disc 111, and different spacers 14 can be replaced to achieve the purpose of adjusting the distance.

The butt joint sleeve 15 is sleeved on the outer ring of the clutch shaft 11 and is positioned at one end of the clutch shaft 11 far away from the clutch flywheel 16;

In this embodiment, the docking sleeve 15 is connected to the motor 2, the docking sleeve 15 is provided with a buckling groove 151, and the output end (which may be a housing part of the reduction gearbox or a housing part of the motor 2) of the corresponding motor 2 is provided with a buckling structure, and a button is further provided at the buckling structure for releasing the connection between the buckling groove 151 and the buckling structure.

The clutch flywheel 16 has a mating shaft 161 at one end facing the clutch shaft 11, an output shaft 17 at the other end, and grooves 162 corresponding to the protrusions 112 one by one are provided on the mating shaft 161.

In this embodiment, the groove 162 of the docking shaft 161 cooperates with the protrusion 112 on the clutch disc 111 to realize a clutch function, and after a certain torque is exceeded, the protrusion 112 moves out of the groove 162, at this time, the elastic sleeve 13 is compressed, in a disengaged state, and when the rotation is continued, the protrusion 112 moves into the next groove 162, at this time, the elastic force of the elastic sleeve 13 drives the protrusion 112 into the groove 162, so that coaxial rotation connection is realized again, and in a driving connection state. The clutch flywheel 16 is used to create a rotational inertia to create a large impact force.

Therefore, in order to ensure the performance and stability of the clutch structure 1, the left and right ends of each protrusion 112 are provided with inclined surfaces, each groove 162 is also provided with a corresponding inclined surface, the height of each protrusion 112 is smaller than the depth of each groove 162, the cross section of each protrusion 112 and the cross section of each groove 162 are isosceles trapezoids, that is, a gap is formed between the left and right sides of each groove 162 and the left and right sides of each protrusion 112.

Wherein the shape descriptions of the protrusions 112 and the recesses 162 are different from different perspectives, the present application is described only from a certain angle, and may be described differently from different angles.

Preferably, the outer ring of the docking shaft 161 is provided with a positioning bearing 18.

Preferably, the number of grooves 162 and protrusions 112 is 3-8, and 5 are selected in this embodiment.

Example two

As shown in fig. 5, the electric wrench comprises a clutch structure 1 of the first embodiment, a shell 3 and a motor 2 arranged in the shell 3, wherein a main shaft of the motor 2 is in driving connection with a clutch shaft 11 of the clutch structure 1.

The structure of the electric wrench is almost identical with that of the existing wrench, and the difference is that the special clutch structure 1 of the application is adopted, so that longer service life can be provided, faults are reduced, and cost is reduced.

The application is not described in detail in the prior art, and therefore, the application is not described in detail.

It will be understood that the terms "a" and "an" should be interpreted as referring to "at least one" or "one or more," i.e., in one embodiment, the number of elements may be one, while in another embodiment, the number of elements may be plural, and the term "a" should not be interpreted as limiting the number.

Although the terms clutch structure 1, motor 2, housing 3, clutch shaft 11, clutch disc 111, boss 112, docking slot 113, elastic sleeve 13, spacer 14, docking sleeve 15, snap groove 151, clutch flywheel 16, docking shaft 161, groove 162, output shaft 17, positioning bearing 18 are used more herein, the possibility of using other terms is not excluded. These terms are used merely for convenience in describing and explaining the nature of the application; they are to be interpreted as any additional limitation that is not inconsistent with the spirit of the present application.

The present application is not limited to the above-mentioned preferred embodiments, and any person can obtain various other products without departing from the scope of the present application, but any changes in shape or structure of the present application, all having the same or similar technical solutions, fall within the scope of the present application.

Claims

1. Clutch structure, its characterized in that includes:

the clutch shaft is sleeved on the clutch shaft outer ring and is positioned at one end of the clutch shaft far away from the clutch flywheel;

The clutch flywheel, towards the one end of clutch axle is equipped with the butt joint axle, and the other end is connected with the output shaft, be equipped with on the butt joint axle with protruding one-to-one's recess.

2. The clutched device of claim 1, wherein the protrusion has a height that is less than a depth of the groove.

3. The clutch structure according to claim 2, wherein each of the protrusions is provided with inclined surfaces at both left and right ends thereof, and each of the grooves is also provided with a corresponding inclined surface.

4. A clutched device as claimed in claim 3, wherein each of the protrusions and each of the grooves has an isosceles trapezoid cross section.

5. The clutch structure according to claim 1, wherein the outer race of the mating shaft is provided with a positioning bearing.

6. The clutch structure according to claim 1, wherein the butt joint sleeve is provided with a buckling groove.

7. The clutch structure according to claim 1, wherein an inner wall of the clutch shaft at an end far from the clutch disc is provided with a butt joint groove.

8. The clutch structure according to any one of claims 2 to 4, wherein a gap is provided between left and right side surfaces of the groove and left and right side surfaces of the protrusion.

9. The clutch structure according to any one of claims 1 to 7, wherein the number of the grooves and the protrusions is 3 to 8.

10. An electric wrench, characterized by comprising the clutch structure according to any one of claims 1-9, a housing and a motor arranged in the housing, wherein a main shaft of the motor is in driving connection with a clutch shaft of the clutch structure.