CN201483434U

CN201483434U - Brushless electric screwdriver electromagnetic induction type automatic shutdown structure

Info

Publication number: CN201483434U
Application number: CN2009201602421U
Authority: CN
Inventors: 倪锦波
Original assignee: Individual
Current assignee: Individual
Priority date: 2009-06-19
Filing date: 2009-06-19
Publication date: 2010-05-26
Anticipated expiration: 2019-06-19

Abstract

The utility model relates to the technical field of the electric tool, in particular to a brushless electric screwdriver electromagnetic induction type automatic shutdown structure, which comprises a Hall sensor, a fixing bracket, a magnetic ring, a torque separating cup and a thrust plate. The fixing bracket is a hollow cylinder, the surface of the fixing bracket is provided with an accommodating groove, the Hall sensor is arranged in the accommodating groove, one end of a clutch is arranged in the fixing bracket, the other end of the clutch is arranged in the torque separating cup and is connected with a torque output shaft, the opening of the torque separating cup is provided with the magnetic ring, the tail end of the torque separating cup is connected with the thrust plate, and the magnetic cup and the fixing bracket form a gap. The utility model has the advantages of simple and scientific structural design, easy assembly, high precision and long service life.

Description

Brushless electric screwdriver electromagnetic induction autostop structure

Technical field:

The utility model relates to the electric tool technical field, refers in particular to brushless electric screwdriver electromagnetic induction autostop structure.

Background technology:

Electric screw driver is used to tighten and unscrew the electric tool that screw is used, and it is mainly used in assembly line, is the instrument of manufacturing enterprise's indispensability.

At present, be to use bigger mechanical switch of volume or contact microswitch that the turning to of known electric screw driver, high low speed switch are realized the brake of electric screw driver, occurred a kind of afterwards again by the sensor displacement detecting, the brake that has realized contactless electromagnetic induction detects, but structure science not all, parts are difficult for assembling, and it is not high to occur precision in the use, brake failure is quick, and service life is not long.

Because the existence of above problem brings very big inconvenience to the user.

The utility model content:

The purpose of this utility model is at the deficiencies in the prior art, and brushless electric screwdriver electromagnetic induction autostop structure is provided, the simple science of its structural design, easily assembling, precision height, long service life.

For achieving the above object, the utility model adopts following technical scheme, it comprises Hall element, fixed mount, magnet ring, torsion separate cup, thrust button, fixed mount is a hollow cylinder, its surface offers storage tank, Hall element is installed in the storage tank, one end of clutch is installed in the fixed mount, the clutch other end is installed in the torsion separate cup and is connected with the torsion output shaft, the rim of a cup of torsion separate cup is provided with magnet ring, the tail end of torsion separate cup is connected with thrust button, and magnet ring and fixed mount have the gap.

Described magnet ring is powerful magnet ring.

Described torsion separate cup is that aluminium alloy or the good nonmetallic materials of anti-wear performance are made.

Be provided with steel ball between described clutch and the thrust button.

Described Hall element is a linear transducer.

The utility model beneficial effect is: fixed mount is a hollow cylinder, its surface offers storage tank, Hall element is installed in the storage tank, one end of clutch is installed in the fixed mount, the clutch other end is installed in the torsion separate cup and is connected with the torsion output shaft, the rim of a cup of torsion separate cup is provided with magnet ring, the tail end of torsion separate cup is connected with thrust button, magnet ring and fixed mount have the gap, when when magnetic signal changes, magnetic position sensor detects, gather the magnetic signal that magnetic part sends, the accuracy of detection height can be realized the control of small moment of torsion, can prevent the misoperation of electric screw driver in low kilogram zone, reliable operation owing to cancelled mechanical contact switch, has greatly improved the working life of electric screw driver.

Description of drawings:

Fig. 1 is a cutaway view of the present utility model;

Fig. 2 is a structural representation of the present utility model;

Fig. 3 is the structural representation of the utility model other direction;

Fig. 4 is the structural representation of the utility model thrust button, torsion separate cup, magnet ring;

Fig. 5 is the structural representation of the utility model fixed mount;

Fig. 6 is a decomposition texture schematic diagram of the present utility model.

The specific embodiment:

See that Fig. 1 is to shown in Figure 6: the utility model comprises Hall element 101, fixed mount 102, magnet ring 103, torsion separate cup 10, thrust button 100, fixed mount 102 is a hollow cylinder, its surface offers storage tank 200, Hall element 101 is installed in the storage tank 200, Hall element 101 can not limited by the position in storage tank 200, and is easy to assembly; One end of clutch 5 is installed in the fixed mount 102, clutch 5 other ends are installed in the torsion separate cup 10 and are connected with torsion output shaft 7, the rim of a cup of torsion separate cup 10 is provided with magnet ring 103, and the tail end of torsion separate cup 10 is connected with thrust button 100, and magnet ring 103 has the gap with fixed mount 102.

Described magnet ring 103 is powerful magnet ring.

Described torsion separate cup 10 is made for aluminium alloy or the good nonmetallic materials of anti-wear performance, can not be subjected to the influence of magnet ring 103 powerful magnetic.

Be provided with steel ball 6 between described clutch 5 and the thrust button 100.

Described Hall element 101 is a linear transducer, and Hall element 101 is connected with circuit board 2 by lead.

The utility model is assemblied in the whole electric screw driver and uses, electric screw driver constitutes latter half of by shell 1, circuit board 2, non-carbonate motor 3, gearbox 4, be connected with clutch 5 of the present utility model then, clutch 5 other ends are installed in the torsion separate cup 10 and are connected with torsion output shaft 7, driver bit 8 is installed on the torsion output shaft 7, be arranged with torque spring 9 on the torsion output shaft 7, withstand on the retainer plate that is provided with in the shell 1 lower end that torque spring 9 one ends withstand thrust button 100, the other end.

Whole electric screw driver afterbody is provided with link 13, power supply connector 15, is respectively equipped with the positive and negative switch 14 and the starting switch 11 of the control circuit of circuit board 2 on the shell 1, and starting switch 11 tops are provided with button 12.

Operation principle of the present utility model is as follows: when the electric screw driver output torque equals to set moment, screw stops the rotation, make driver bit 8, non-carbonate motor 3, torsion output shaft 7 also stops the rotation, at this moment gearbox 4 output shafts and clutch 5 drive still in rotation, clutch 5 drives steel ball 6 motions, promoting clutch 5 moves downward, thereby driving torsion separate cup 10 moves downward, make torsion separate cup 10 leave fixed mount 102 and form a space, Hall element 101 perceives the variation in magnetic field, the analog signal voltage of output direct ratio and magnetic field intensity, this signal voltage outputs to the control circuit of circuit board 2, carrying out signal by control circuit handles and analyzes, move downward and reach maximum when torsion separate cup 10 and rim of a cup are provided with magnet ring 103, the analog signal voltage changing value of Hall element 101 outputs is maximum at this moment, the control circuit of circuit board 2, the value of this moment is Vmax or Vmin, Vmax or Vmin and Hall element 101 and relevant with the position relation of magnet ring 103, along with voltage swing changes and changes of magnetic field, when magnet ring 103 can be with fixed mount 102 and closed, the time and form the gap, thereby the rotation that clutch 5 can control torsion output shafts 7 with stop.

The above only is preferred embodiment of the present utility model, so all equivalences of doing according to the described structure of the utility model patent claim, feature and principle change or modify, is included in the utility model patent claim.

Claims

1. brushless electric screwdriver electromagnetic induction autostop structure; it comprises Hall element (101); fixed mount (102); magnet ring (103); torsion separate cup (10); thrust button (100); it is characterized in that: fixed mount (102) is a hollow cylinder; its surface offers storage tank (200); Hall element (101) is installed in the storage tank (200); one end of clutch (5) is installed in the fixed mount (102); clutch (5) other end is installed in the torsion separate cup (10) and is connected with torsion output shaft (7); the rim of a cup of torsion separate cup (10) is provided with magnet ring (103); the tail end of torsion separate cup (10) is connected with thrust button (100), and magnet ring (103) has the gap with fixed mount (102).

2. brushless electric screwdriver electromagnetic induction autostop structure according to claim 1, it is characterized in that: described magnet ring (103) is powerful magnet ring.

3. brushless electric screwdriver electromagnetic induction autostop structure according to claim 1, it is characterized in that: described torsion separate cup (10) is made for aluminium alloy or the good nonmetallic materials of anti-wear performance.

4. brushless electric screwdriver electromagnetic induction autostop structure according to claim 1 is characterized in that: be provided with steel ball (6) between described clutch (5) and the thrust button (100).

5. brushless electric screwdriver electromagnetic induction autostop structure according to claim 1, it is characterized in that: described Hall element (101) is a linear transducer.