CN214870153U

CN214870153U - Electric wrench capable of simultaneously realizing fixed torque and impact

Info

Publication number: CN214870153U
Application number: CN202022662172.9U
Authority: CN
Inventors: 孟建军
Original assignee: Lanzhou Tongda Kaizhi Railway Technology Co ltd
Current assignee: Lanzhou Tongda Kaizhi Railway Technology Co ltd
Priority date: 2020-11-17
Filing date: 2020-11-17
Publication date: 2021-11-26
Anticipated expiration: 2030-11-17

Abstract

The utility model relates to an electric spanner, concretely relates to can realize electric spanner of fixed torque and impact simultaneously, including motor output shaft, motor output shaft one end and power supply retarder connection, the motor output shaft other end be connected with universal spanner through the subassembly that can produce moment of torsion and impact to the bolt, can produce the subassembly of moment of torsion and impact to the bolt, including the driving shaft, driving shaft one end pass through the main pressure spring with motor output shaft one end connect, the driving shaft other end can be connected with driven piece one end pivoted relatively, the driven piece other end with universal spanner connect, solved current no matter be ordinary spanner or electric spanner only can realize the fastening to the spanner, and can't possess the problem of the function of hammer.

Description

Electric wrench capable of simultaneously realizing fixed torque and impact

Technical Field

The utility model relates to an electric wrench, concretely relates to can realize the electric wrench of fixed torque and impact simultaneously.

Background

In maintenance work of railway track bolts, there are cases where it is not necessary to fasten the bolts and it is necessary to tap and knock a member such as a screw which protrudes due to vibration or the like. Therefore, maintenance workers need to carry tools such as a hammer while carrying the wrench, and the conventional wrench or electric wrench can only fasten the wrench and cannot have the function of the hammer.

SUMMERY OF THE UTILITY MODEL

In view of this, the present application provides an electric wrench capable of simultaneously implementing a constant torque and an impact, which solves the problem that the conventional electric wrench can only fasten a wrench and cannot have the function of a hammer regardless of whether the electric wrench is a general wrench or an electric wrench.

The technical scheme of the utility model as follows:

the electric wrench capable of simultaneously realizing fixed torque and impact comprises a motor output shaft, wherein one end of the motor output shaft is connected with a power source reducer, and the other end of the motor output shaft is connected with a universal wrench through a component capable of generating torque and impact on a bolt.

The assembly capable of generating torque and impact on the bolt comprises a driving shaft, one end of the driving shaft is connected with one end of a motor output shaft through a main pressure spring, the other end of the driving shaft can rotate relatively to be connected with one end of a driven block, the other end of the driven block is connected with a universal wrench, a herringbone groove is formed in the outer wall of the driving shaft, a steel ball is arranged in the driving shaft, a driving block is installed outside the driving shaft in a matched mode, the driving block is of a cylindrical structure, the inner wall of the driving block is in contact with the steel ball, the tail end of the driving block is arranged on the outer edge of the driving block and is buckled with the driven block, and a shell is arranged outside the driving block.

The tail end of the driving shaft is in mortise and tenon joint with the driven block.

The outer edge of the tail end of the driving block is provided with a shifting piece which can be clamped with the corresponding end of the driven block.

The head of the motor output shaft is provided with a key groove which can be connected with the power source reducer and is mutually connected.

Compared with the prior art, the detailed description of the application is as follows:

the utility model has simple structure, convenient use and convenient operation, improves the working efficiency, and is divided into clockwise rotation impact operation and anticlockwise constant torque rotation operation during operation; when the motor rotates clockwise, the motor drives the driving shaft to rotate after being decelerated, steel balls on two sides of the driving shaft move in the improved herringbone groove, so that the main pressure spring is compressed to cause impact (striking) of the driving block on the driven block, after the impact, the main pressure spring returns to enable the driving block to rebound to the initial position, a reaction force arm is not needed, and the process is repeated to realize the impact; when the wrench rotates anticlockwise, the improved herringbone groove is filled with half of the grooves, so that the steel balls do not move in the improved herringbone groove and only rotate along with the driving shaft, the main pressure spring cannot be stressed and compressed, the driving block drives the driven block to rotate along with the driving shaft, impact (striking) cannot occur, and fixed torque rotation operation of the wrench is realized. The utility model discloses can be under the impact effect when not influencing the clockwise rotation operation, realize the rotatory operation of fixed torque when the anticlockwise rotation operation. Namely the utility model discloses can theoretically reach the moment of torsion infinitely great when clockwise rotation operation, and reach the moment of torsion size and the precision standard that require when anticlockwise rotation operation. The utility model discloses what adopt when clockwise operation is impact mode, the event is not high to the torsion requirement of motor, the utility model discloses the motor that uses need meet when only reaching the anticlockwise rotation operation torsion and the required torsion requirement in alright realization background art of precision standard because under general condition, the torsion that the fixed torque needs is less than required torsion requirement when assaulting far away, the event the utility model discloses the waste of motor torsion has significantly reduced and the weight of whole spanner has alleviateed relatively.

Drawings

Fig. 1 is a three-dimensional schematic view of an electric wrench capable of simultaneously realizing constant torque and impact according to an embodiment of the present invention.

Fig. 2 is a three-dimensional schematic diagram of the electric wrench after shelling.

Fig. 3 is an exploded three-dimensional schematic view of the internal structure of the electric wrench of the present invention.

Fig. 4 is a three-dimensional schematic view of the herringbone groove of the present invention.

The universal wrench comprises a motor output shaft 1, a driving shaft 2, a steel ball 3, a herringbone groove 4, a driving pressure spring 5, a driving block 6, a driven block 7, a universal wrench 8 and an outer shell 9.

Detailed Description

In order to make those skilled in the art better understand the technical solution of the present invention, the present invention will be further described in detail with reference to the specific embodiments.

An electric wrench capable of simultaneously realizing constant torque and impact comprises a motor output shaft 1, one end of the motor output shaft 1 is connected with a power source reducer, the other end of the motor output shaft 1 is connected with a universal wrench 8 through a component capable of generating torque and impact on a bolt, the component capable of generating torque and impact on the bolt comprises a driving shaft 2, one end of the driving shaft 2 is connected with one end of the motor output shaft 1 through a main pressure spring 5, the other end of the driving shaft 2 can be connected with one end of a driven block 7 in a relatively rotating way, the other end of the driven block 7 is connected with the universal wrench 8, a herringbone groove 4 is arranged on the outer wall of the driving shaft 2, a steel ball 3 is arranged in the driving shaft 2, a driving block 6 is installed outside the driving shaft 2 in a matching way, the driving block 6 is of a cylindrical structure, the inner wall of the driving block 6 is mutually contacted with the steel ball 3, the outer edge of the tail end of the driving block 6 is mutually buckled with the driven block 7, and an outer shell 9 is arranged outside the driving block 6, the tail end of the driving shaft 2 is in mortise and tenon joint with the driven block 7, the outer edge of the tail end of the driving block 6 is provided with a shifting piece which can be clamped with the corresponding end of the driven block 7, and the head of the motor output shaft 1 is provided with a key groove which can be connected with the power source speed reducer and is connected with the power source speed reducer.

The utility model discloses when using, the operation process divide into clockwise rotation impact operation and two kinds of modes of anticlockwise rotation fixed torque operation, when the motor starts clockwise rotation, motor output shaft 1 drives driving shaft 2 rotatory, and herringbone groove 4 on driving shaft 2 is rotatory along with it, shell body 9 is static, relative motion between them then can make steel ball 3 roll in herringbone groove 4, and then make driving block 6 take place axial displacement, compress driving pressure spring 5, make it hold up power, arouse the impact of driving block 6 to driven block 7, after assaulting, driving pressure spring 5 returns and makes driving block 6 rebound initial position, so far accomplish an impact process, and the impact operation is the process of repeating above ceaselessly; when the motor starts to rotate anticlockwise, the motor output shaft 1 drives the driving shaft 2 to rotate, the herringbone groove 4 on the driving shaft 2 also rotates along with the motor, but the rotating direction does not have a groove similar to the clockwise direction, so the steel ball 3 cannot roll in the herringbone groove 4, only the top end of the herringbone groove 4 rotates around the axis along with the driving shaft 2, the driving block 6 cannot generate axial displacement, the main pressure spring 5 cannot be compressed, and impact cannot occur.

The above is only a preferred embodiment of the present invention, and it should be noted that the above preferred embodiment should not be considered as limiting the present invention, and the protection scope of the present invention should be subject to the scope defined by the claims. It will be apparent to those skilled in the art that various modifications and enhancements can be made without departing from the spirit and scope of the invention, and such modifications and enhancements are intended to be within the scope of the invention.

Claims

1. The utility model provides a can realize electric spanner of fixed torque and impact simultaneously which characterized in that: the universal wrench is characterized by comprising a motor output shaft (1), wherein one end of the motor output shaft (1) is connected with a power source speed reducer, and the other end of the motor output shaft (1) is connected with a universal wrench (8) through a component capable of generating torque and impact on a bolt.

2. The electric wrench capable of simultaneously realizing constant torque and impact according to claim 1, characterized in that: the assembly capable of generating torque and impact on the bolt comprises a driving shaft (2), one end of the driving shaft (2) is connected with one end of a motor output shaft (1) through a main pressure spring (5), the other end of the driving shaft (2) can relatively rotate and is connected with one end of a driven block (7), the other end of the driven block (7) is connected with the universal wrench (8), the outer wall of the driving shaft (2) is provided with a herringbone groove (4), the steel ball (3) is arranged in the driving shaft (2), the driving block (6) is arranged outside the driving shaft (2) in a matching way, the driving block (6) is of a cylindrical structure, the inner wall of the driving block (6) is in mutual contact with the steel balls (3), the outer edge of the tail end of the driving block (6) is buckled with the driven block (7) mutually, and an outer shell (9) is arranged outside the driving block (6).

3. The electric wrench capable of simultaneously realizing constant torque and impact according to claim 2, wherein: the tail end of the driving shaft (2) is in mortise and tenon joint with the driven block (7).

4. The electric wrench capable of simultaneously realizing constant torque and impact according to claim 2, wherein: the outer edge of the tail end of the driving block (6) is provided with a shifting piece which can be mutually clamped with the corresponding end of the driven block (7).

5. The electric wrench capable of simultaneously realizing constant torque and impact according to claim 1, characterized in that: the head of the motor output shaft (1) is provided with a key groove which can be connected with the power source speed reducer and is mutually connected.