CN220882144U

CN220882144U - Fixed torque wrench

Info

Publication number: CN220882144U
Application number: CN202322729316.1U
Authority: CN
Inventors: 刘洪升; 熊宇; 张志杰; 韩高军; 杜磊; 靳岩
Original assignee: Suzhou Zhuzheng Robot Co ltd
Current assignee: Suzhou Zhuzheng Robot Co ltd
Priority date: 2023-10-11
Filing date: 2023-10-11
Publication date: 2024-05-03
Anticipated expiration: 2033-10-11

Abstract

The utility model relates to the technical field of wrenches, in particular to a fixed torque wrench, which comprises the following steps: the bracket is arranged on the rotating shaft, the sliding piece and the limiting piece on the bracket; the peripheral edge of the rotating shaft is arranged in a zigzag shape, and the rotating shaft is used for screwing the ultrasonic bone knife; the sliding piece is meshed with the rotating shaft and can perform linear reciprocating motion in the bracket; the limiting piece is abutted with the sliding piece, and the limiting piece limits the moving distance of the sliding piece to limit the maximum moment of the wrench. Through the scheme, no matter how large a force is used by a user, the maximum moment for tightening the tool bit is determined by the wrench, the problem that the tool bit is damaged or broken due to excessive torsion of the tool bit can be effectively prevented, and meanwhile, the user can judge whether the tool bit is tightened or not through meshing collision sound between the sliding piece and the rotating shaft.

Description

Fixed torque wrench

Technical Field

The utility model relates to the technical field of wrenches, in particular to a fixed torque wrench.

Background

The ultrasonic bone knife is a medical instrument frequently used in bone surgery and is used for cutting or shaping bone tissues, a knife handle and a knife head of the ultrasonic bone knife are usually in a separated design and are connected through threads, a spanner is needed to be used for fixing the knife head on the knife handle in the connecting process, the tightening force of the spanner is needed to be accurately controlled,

In the conventional technology, the torque force of the output cannot be intuitively judged, so that the tool bit is damaged due to overlarge torque force, and the service life of the equipment is reduced.

Disclosure of utility model

The present utility model is directed to solving at least one of the above problems in the prior art and providing a torque wrench.

In order to achieve the above object, a fixed torque wrench of the present utility model includes:

The bracket is arranged on the rotating shaft, the sliding piece and the limiting piece on the bracket;

The peripheral edge of the rotating shaft is arranged in a zigzag shape, and the rotating shaft is used for screwing the ultrasonic bone knife;

the sliding piece is meshed with the rotating shaft and can perform linear reciprocating motion in the bracket;

The limiting piece is abutted with the sliding piece, and the limiting piece limits the moving distance of the sliding piece to limit the maximum moment of the wrench.

Preferably, a first through hole is arranged in the bracket, and penetrates through the bracket;

the size of the first through hole is matched with that of the rotating shaft, and the rotating shaft is arranged in the first through hole and can rotate.

Preferably, a second through hole is further formed in the bracket, the second through hole penetrates through the bracket, and the second through hole penetrates through the first through hole;

The sliding piece and the limiting piece are arranged in the second through hole.

Preferably, the limiting piece comprises a spring and a plug screw;

One end of the spring is fixedly connected with the sliding piece, and the other end of the spring is fixedly connected with the plug screw;

The plug screw is in threaded connection with the bracket, and the plug screw changes the compressibility of the spring by changing the distance between the plug screw and the sliding piece.

Preferably, the engagement end of the sliding piece and the rotating shaft extends into the first through hole.

Preferably, a third through hole is arranged on the rotating shaft, and the opening of the third through hole is matched with the ultrasonic bone knife head.

Preferably, a first annular end cover is further arranged on the bracket, and the first end cover is installed at two ends of the first through hole so as to fix the rotating shaft;

The inner circle of the first end cover exposes the third through hole.

Preferably, a second end cover is further arranged on the support, and the second end cover is installed at two ends of the second through hole.

Preferably, the first through hole is perpendicular to the second through hole.

Preferably, a groove is further formed in the side wall of the support, the size of the groove is matched with that of the cutter head, and the groove is used for screwing the ultrasonic bone knife.

Based on the above, the utility model has the beneficial effects that:

1. According to the scheme, the rotating shaft, the sliding piece and the limiting piece are arranged in the bracket, the rotating shaft is used for sleeving and screwing the ultrasonic bone knife head, the sliding piece is in meshed connection with the rotating shaft and used for transmission, the limiting piece is abutted with the sliding piece, telescopic movement can be carried out in the bracket, when the rotating shaft rotates relative to the bracket, the sliding piece reciprocates, at the moment, the maximum torsion of the rotating shaft relative to the knife head is controlled by controlling the telescopic quantity of the limiting piece, and the knife head can be prevented from being rotated by overlarge torsion of a user by setting the telescopic quantity of the proper limiting piece, so that the knife head is prevented from being damaged;

2. according to the scheme provided by the utility model, the groove is further formed in the support, so that the wrench can still be used as a wrench under the condition that the cutter head cannot be screwed due to damage of the rotating shaft, the cutter head can still be screwed through the groove, and the service life of the wrench is prolonged.

Drawings

FIG. 1 schematically illustrates a front view of a fixed torque wrench according to one embodiment of the utility model;

FIG. 2 schematically illustrates a rear view of a fixed torque wrench according to one embodiment of the utility model;

FIG. 3 schematically illustrates a top view of a fixed torque wrench according to one embodiment of the utility model;

FIG. 4 schematically illustrates a cross-sectional view in the direction A-A' of FIG. 3 of one embodiment of the present utility model;

Description of the drawings: the device comprises a bracket 10, a first through hole 101, a second through hole 102, a groove 103, a rotating shaft 20, a third through hole 201, a sliding piece 30, a limiting piece 40, a spring 401, a plug screw 402, a first end cover 50 and a second end cover 60.

Detailed Description

The present disclosure will now be discussed with reference to exemplary embodiments. It should be understood that the embodiments discussed are merely to enable those of ordinary skill in the art to better understand and thus practice the teachings of the present utility model and do not imply any limitation on the scope of the utility model.

As used herein, the term "comprising" and variants thereof are to be interpreted as meaning "including but not limited to" open-ended terms. The term "based on" is to be interpreted as "based at least in part on". The terms "one embodiment" and "an embodiment" are to be interpreted as "at least one embodiment.

Fig. 1 schematically shows a front view of a fixed torque wrench according to an embodiment of the present utility model, fig. 2 schematically shows a rear view of a fixed torque wrench according to an embodiment of the present utility model, fig. 3 schematically shows a top view of a fixed torque wrench according to an embodiment of the present utility model, fig. 4 schematically shows a cross-sectional view in A-A' direction in fig. 3 according to an embodiment of the present utility model, as shown in fig. 1 to 4, a fixed torque wrench according to an embodiment of the present utility model includes:

A bracket 10, a rotating shaft 20, a sliding member 30 and a limiting member 40 which are arranged on the bracket 10;

The peripheral edge of the rotating shaft 20 is arranged in a zigzag shape, and the rotating shaft 20 is used for screwing the ultrasonic bone knife;

The sliding piece 30 is meshed with the rotating shaft 20, and the sliding piece 30 can perform linear reciprocating motion in the bracket 10;

The limiting member 40 abuts against the sliding member 30, and the limiting member 40 limits the movement distance of the sliding member 30 to the maximum moment of the wrench.

Specifically, the stand 10 may be configured in a football-shaped configuration, or may be configured in other ergonomic configurations for easy handling;

The rotating shaft 20 is arranged on the support 10, preferably the rotating shaft 20 is arranged at the center of the support 10, the sliding part 30 and the limiting part 20 are arranged in the support 10 and are respectively arranged in two, the sliding part 30 can do linear reciprocating motion in the support 10 by taking the rotating shaft 20 as the center, and the limiting part 40 can do telescopic motion in the support 10.

When the tool bit screwing device is used, the compression degree of the limiting piece 40 can be set, the elastic acting force of the limiting piece 40 to the sliding piece 30 is controlled, so that the force of the sliding piece 30 for limiting the rotation of the rotating shaft 20 relative to the support 10 is controlled, the maximum acting force of a wrench for screwing the tool bit is limited, if the force exceeding the force is applied, the rotating shaft 20 rotates relative to the support 10, the tool bit cannot be screwed continuously, and the problem that the tool bit is damaged due to overlarge screwing force can be effectively solved.

Further, a first through hole 101 is provided in the bracket 10, the first through hole 101 penetrating the bracket 10;

The size of the first through hole 101 is matched with the size of the rotating shaft 20, and the rotating shaft 20 is arranged in the first through hole 101 and can rotate.

Specifically, the first through hole 101 is cylindrical, and its diameter is larger than the maximum diameter of the rotating shaft 20, so that the rotating shaft 20 can rotate in the first through hole 101, and the saw-tooth structure at the edge thereof will not rub against the inner wall of the first through hole 101.

Further, a second through hole 102 is further provided in the bracket 10, the second through hole 102 penetrates through the bracket 10, and the second through hole 102 penetrates through the first through hole 101;

The slider 30 and the stopper 40 are disposed in the second through hole 102.

Specifically, the second through holes 102 may be disposed perpendicular to the first through holes 101.

Further, the stopper 40 includes a spring 401 and a plug screw 402;

One end of the spring 401 is fixedly connected with the sliding piece 30, and the other end is fixedly connected with the plug screw 402;

a plug screw 402 is threadedly coupled to the bracket 10, and the plug screw 402 may change the distance between itself and the slider 30 to change the degree of compressibility of the spring 401.

The engagement end of the slider 30 with the rotation shaft 20 protrudes into the first through hole 101.

Specifically, by rotating the cap screw 402, the cap screw 402 is moved in a direction approaching or moving away from the slider 30, so that the spring 401 between the cap screw 402 and the slider 30 is compressed to different degrees;

The shorter the distance between the plug screw 402 and the slider 30, the greater the degree to which the spring 401 is compressed, so that the greater the elastic force imparted to the slider 30 by the spring 401, the greater the abutment force of the slider 30 with the rotating shaft 20, and the greater the force required by the user to rotate the bracket 10 with respect to the rotating shaft 20;

That is, when the elastic force of the spring 401 is controlled to be approximately equal to the amount of force required when the tool bit can be screwed on the tool holder, when the user rotates the holder 10 with a greater force, the torsion force between the slider 30 and the rotating shaft 20 is greater than the elastic force imparted to the slider 30 by the spring 401, so that the slider 30 can also be moved in a direction approaching the spring 401, thereby causing the slider 30 and the rotating shaft 20 to be disengaged, causing the holder 10 to rotate relative to the rotating shaft 20, and the tool bit to be screwed on, avoiding the problem of overload breakage of the tool bit.

Further, the rotating shaft 20 is provided with a third through hole 201, and the opening of the third through hole 201 is matched with the ultrasonic bone knife head, so that the rotating shaft 20 can be sleeved on the knife head, and further torsion force can be given to the knife head for rotating relative to the knife handle.

Further, a first end cap 50 having a circular ring shape is further provided on the bracket 10, and the first end cap 50 is installed at both ends of the first through hole 101 to fix the rotation shaft 20;

The inner circle of the first end cap 50 reveals the third through hole 201.

Specifically, as shown in fig. 1 and 2, the first end caps 50 located at both ends of the first through hole 101 have different inner circle sizes, wherein one of the first end caps 50 has an inner circle size larger than that of the other and the other has an inner circle with a larger diameter larger than the length between the shorter ends of the two sides of the third through hole 201, so that the inner circle of the first end cap 50 can completely expose the opening of the third through hole 201;

The first end cap 50, which has a smaller inner diameter on the other side, has an inner diameter equal to or smaller than the length between the longer ends of the both sides of the third through hole 201, so that the third through hole 201 on the side is partially exposed when the first end cap 50 is mounted on the rotation shaft 20.

Through this kind of setting, the device can only follow the installation of one side that third through hole 201 all exposes and supersound bone knife tool bit, and then can inject the rotatory direction of screwing up of device to guarantee that the meshing direction of meshing department between pivot 20 and slider 30 is accurate, avoid reverse meshing department damage problem that moves the spanner and cause.

The arrangement of the first end cover 50 can prevent other sundries from entering the first through hole 101, avoid the condition that the bracket 10 cannot rotate relative to the rotating shaft 20, and avoid the failure of the fixed moment function of the wrench.

Meanwhile, the first end cover 50 can also be protected based on the sawtooth-shaped structure at the edge of the rotating shaft 20, so that the rotating shaft 20 cannot be limited by the sliding piece 30 due to the damage of the sawtooth-shaped structure is prevented, and the situation that a wrench cannot screw a tool bit through the rotating shaft 20 is avoided.

The first end cap 50 is provided in a circular ring shape so that the third through-hole 201 can be exposed so that the wrench can screw the bit through the rotation shaft 20.

Further, the second end cover 60 is further provided on the bracket 10, and the second end cover 60 is mounted at two ends of the second through hole 102, so that a dustproof effect can be achieved, and meanwhile, the limiting member 40 can be prevented from sliding out from two ends.

Further, a groove 103 is further formed in the side wall of the support 10, the size of the groove 103 is matched with that of the cutter head, and the groove 103 is used for screwing the ultrasonic bone knife.

The arrangement of the groove 103 can enable the wrench of the utility model to be used as a wrench when the rotating shaft 20 is damaged or fails, and the ultrasonic bone knife head can be screwed up through the groove 103, so that the service life of the wrench can be further prolonged.

In summary, by using the wrench of the present utility model, the maximum torque of tightening the tool bit is determined by the compression degree of the limiting member 40 no matter how much force is applied by the user, so that the problem of damage or breakage of the tool bit caused by excessive twisting of the tool bit can be effectively prevented, and at the same time, the user can determine whether the tool bit has been tightened or not by the engaging collision sound between the sliding member 30 and the rotating shaft 20.

The above description is only illustrative of the preferred embodiments of the present application and of the principles of the technology employed. It will be appreciated by persons skilled in the art that the scope of the application referred to in the present application is not limited to the specific combinations of the technical features described above, but also covers other technical features formed by any combination of the technical features described above or their equivalents without departing from the inventive concept. Such as the above-mentioned features and the technical features disclosed in the present application (but not limited to) having similar functions are replaced with each other.

It should be understood that, the sequence numbers of the steps in the summary and the embodiments of the present application do not necessarily mean the order of execution, and the execution order of the processes should be determined by the functions and the internal logic, and should not be construed as limiting the implementation process of the embodiments of the present application.

Claims

1. A fixed torque wrench, comprising:

2. The fixed torque wrench of claim 1, wherein a first through hole is provided in the bracket, the first through hole extending through the bracket;

3. The fixed torque wrench of claim 2, wherein a second through hole is further provided in the bracket, the second through hole extending through the bracket, and the second through hole extending through the first through hole;

4. A fixed torque wrench as claimed in claim 3, wherein said stop member comprises a spring and a plug screw;

5. The fixed torque wrench of claim 2, wherein the engagement end of the slider and the shaft extends into the first bore.

6. The fixed torque wrench of claim 2, wherein a third through hole is provided in the shaft, and an opening of the third through hole is matched with the ultrasonic bone knife head.

7. The fixed torque wrench of claim 6, wherein a first end cap is further provided on the bracket, and the first end cap is mounted at both ends of the first through hole to fix the rotating shaft;

The inner circle of the first end cover exposes the third through hole.

8. A fixed torque wrench as claimed in claim 3, wherein a second end cap is further provided on the bracket, the second end cap being mounted to both ends of the second through hole.

9. A fixed torque wrench as claimed in claim 3, wherein said first through hole is disposed perpendicular to said second through hole.

10. The fixed torque wrench of claim 1, further comprising a recess in the side wall of the bracket, the recess sized to fit the tool bit, the recess configured to tighten an ultrasonic bone knife.