CN2604284Y - Bidirectional percussive electric & pneumatic spanner - Google Patents

Abstract

The utility model relates to a bidirectional impact type electric and pneumatic wrench which comprises a casing, a motor or a wind motor, a clutch, a free wheel, a main shaft and a projection on the mThe utility model relates to a bidirectional ram type electric and pneumatic wrench, including a shell, an electric motor or air motor, a clutch, a flywheel, a main shaft and a protruded block thereonain shaft. The utility model is characterized in that the free wheel is provided with two opposite shaft pins which are respectively provided with impact blocks, each of the impact blocks adopts one o, which is characterized in that: two relative shaft pins are arranged on the flywheel and are respectively provided with an impact block, the impact block with the shaft pin as its centre is an eccenf the shaft pins as center and is an imbalanced block, the inner face of each of the impact blocks is cambered, the impact blocks on the two shaft pins are symmetrically arranged, the free wheel on thtric block, the inner side surface of the impact block is arc, the impact blocks of two shaft pins are symmetrically disposed, a blocking pin is provided on the flywheel of the lightweight end externae outer lateral face of the light end of each of the impact blocks which respectively adopt the shaft pins as the center is provided with a baffle pin, and the heavy ends of the two impact blocks are l side of the impact block with the shaft pin as its centre, the heavy ends of two shaft pins are connected by tension spring. The advantage is that the utility model can realize the impact by bidirecprovided with torsional springs connected together. The utility model has the advantages that the impact of the bidirectional and symmetric force moments of an impact type electric and pneumatic wrenctional symmetric torque of electric and pneumatic wrench, and can ensure the uniform torque when the ram type electric and pneumatic wrench disassembles bolts. h can be realized, and the force moments of the impact type electric and pneumatic wrench which screws and demount bolts are guaranteed to be consistent with each other.

Description

Electronic and the pneumatic impact spanner of a kind of two-way impacting type

Technical field

The utility model relates to a kind of electronic and pneumatic impact spanner, the electronic and pneumatic impact spanner of particularly a kind of two-way impacting type.

Background technology

In existing vehicle maintenance maintenance, often utilize the percussive electric wrench to twist and tear bolt open, but owing in the vehicle maintenance the stubborn of bolt torn open, and screw thread has again clockwise and counter clockwise direction, because the moment of tightening of bolt has strict requirement, therefore need forward and reverse two-way percussive electric wrench that knocks the moment unanimity, and utilize dc motor power positive and negatively accomplish positive and negative two-way rotation easily, but because the impact structure of existing two-way percussive electric wrench is after commutation, can not guarantee moment unanimity when two-way knocking, influence the use of electric wrench.

Summary of the invention

The purpose of this utility model is to solve often to utilize the stubborn bolt of tearing open of percussive electric wrench in the prior art in the existing vehicle maintenance maintenance, but owing in the vehicle maintenance the stubborn of bolt torn open, and screw thread has again clockwise and counter clockwise direction, because the moment of tightening of bolt has strict requirement, therefore need forward and reverse two-way percussive electric wrench that knocks the moment unanimity, and utilize dc motor power positive and negatively accomplish positive and negative two-way rotation easily, but because the impact structure of existing two-way percussive electric wrench is after commutation, can not guarantee moment unanimity when two-way knocking, influence the problem of the use of electric wrench.The utility model designs the electronic and pneumatic impact spanner of a kind of two-way impacting type, comprise the projection on casing, motor or wind motor, clutch, flywheel, main shaft and the main shaft, it is characterized in that: two relative pivot pins are arranged on flywheel, impact block is respectively arranged on the pivot pin, impact block is that the center is a weighting block with the pivot pin, the medial surface of impact block is an arc surface, impact block on two pivot pins is symmetry and places, impact block is on the flywheel of light end lateral surface at center backing pin to be arranged with the pivot pin, and the heavily end of two impact blocks has extension spring to be connected.The utility model has the advantages that the bump of the bi-directional symmetrical moment that can realize the electronic and pneumatic impact spanner of impacting type, guarantee that the electronic and pneumatic impact spanner of impacting type is in the moment unanimity of twisting when tearing bolt open.

Description of drawings

Below in conjunction with drawings and Examples the utility model is elaborated, accompanying drawing 1 is a structural representation of the present utility model, and accompanying drawing 2 is an AA generalized section of the present utility model,

Comprise the projection 6 on casing 1, motor 2, clutch 3, flywheel 4, main shaft 5 and the main shaft 5 among the specific embodiment figure, it is characterized in that: two relative pivot pins 8 are arranged on flywheel 4, impact block 9 is respectively arranged on the pivot pin 8, impact block 9 is that the center is a weighting block with pivot pin 8, the medial surface of impact block 9 is an arc surface, impact block 9 on two pivot pins 8 is symmetry to be placed, and impact block 9 is to have the heavily end of backing pin 10, two impact blocks 9 to have extension spring 7 to be connected on the flywheel 4 of light end lateral surface at center with pivot pin 8.During use after motor 2 drives clutches 3 and flywheel 4 rotations, impact block 9 on the flywheel 4 is subjected to action of centrifugal force and is the outer tendency of falling, when rotating speed reaches certain, the centrifugal force that impact block 9 is subjected to draws back extension spring 7 greater than the pulling force of extension spring 7, impact block 9 is owing to be to be the weighting block at center with pivot pin 8, therefore two impact blocks 9 all can rotate around pivot pin 8, owing on the flywheel 4 of the light end lateral surface of two impact blocks 9 backing pin 10 is arranged, therefore heavily holding around pivot pin of impact block 9 rotated toward the outside of flywheel 4, because two impact blocks 9 are symmetry and place, so clockwise another piece rotates counterclockwise, when this moment, if flywheel 4 rotated for clockwise direction, the impact block 9 that turns clockwise will clash into the projection 6 on the main shaft 5, drive main shaft 5 and clockwise rotate.And when flywheel 4 counterclockwise rotates, the impact block 9 that is rotated counterclockwise will clash into the projection 6 on the main shaft 5, driving main shaft 5 rotates counterclockwise, finish the bump of the bi-directional symmetrical moment of the electronic and pneumatic impact spanner of impacting type, the speed of bump rear flywheel 4 reduces, and the suffered centrifugal force of impact block 9 reduces, and the answer pulling force of extension spring 7 is two impact blocks, 9 past pulling back, impact block 9 turns to till light end lateral surface stopped by the backing pin on the flywheel 4 10 around pivot pin 8, and impact block 9 restores.

Claims (1)

1. Electronic and the pneumatic impact spanner of a kind of two-way impacting type, comprise the projection on casing, motor or wind motor, clutch, flywheel, main shaft and the main shaft, it is characterized in that: two relative pivot pins are arranged on flywheel, impact block is respectively arranged on the pivot pin, impact block is that the center is a weighting block with the pivot pin, and the medial surface of impact block is an arc surface, and the impact block on two pivot pins is symmetry and places, impact block is on the flywheel of light end lateral surface at center backing pin to be arranged with the pivot pin, and the heavily end of two impact blocks has extension spring to be connected.

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