CN211466180U - Electric screwdriver switching device and electric screwdriver - Google Patents

Abstract

The utility model discloses an electric screwdriver switching device for control screwdriver main shaft starts or stall, including annular magnet and magnetic induction element, the screwdriver main shaft sets up with being endwise slip, annular magnet cup joints and is fixed in outside the screwdriver main shaft, magnetic induction element set up in annular magnet's the outside, with the screwdriver main shaft drives annular magnet is close to time control the screwdriver main shaft rotates, or is in the screwdriver main shaft drives control when annular magnet keeps away from screwdriver main shaft stall. The utility model discloses electric screwdriver switching device can start or stop at the automatic control motor around wrong screw, realizes automatic screw, convenience simple to use. In addition, the utility model discloses still disclose an electric screwdriver.

Description

Electric screwdriver switching device and electric screwdriver

Technical Field

The utility model relates to a screwdriver especially relates to an electric screwdriver switching device and electric screwdriver.

Background

Screwing is now generally carried out in two ways, the first being manually operated by a screwdriver and the second being automatically operated by means of a power screwdriver. To the first mode, the screwdriver is small in size and simple in structure, but needs manual operation, wastes time and labor, and is not beneficial to production. For the second mode, when screwing, although the screw can be screwed automatically by the motor, the electric screw drivers on the market are usually semi-automatic, and the automatic start and stop of the motor cannot be controlled. Namely, the switch is required to be manually pressed to start the motor when the screw is screwed, and the switch is required to be manually pressed to stop the motor after the screw is screwed; when a large amount of screws are screwed, the fingers of operators are tired due to frequent pressing of the switch, so that the use is inconvenient and the production is not facilitated.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an automatic control motor starts or stops around wrong screw, realizes automatic screw of going up, convenient electric screwdriver switching device simple to use.

Another object of the utility model is to provide an automatic control motor starts or stops around twisting the screw, realizes automatic screw of going up, convenient electric screwdriver simple to use.

In order to realize above-mentioned purpose, the utility model provides an electric screwdriver switching device for control screwdriver main shaft starts or stall, including annular magnet and magnetic induction element, screwdriver main shaft sets up with being endwise slip, annular magnet cup joints and is fixed in outside the screwdriver main shaft, magnetic induction element set up in annular magnet's the outside, with the screwdriver main shaft drives annular magnet is close to time control the screwdriver main shaft rotates, or the screwdriver main shaft drives control when annular magnet keeps away from screwdriver main shaft stall.

Compared with the prior art, because the utility model discloses set up an annular magnet outside screwdriver main shaft, and set up magnetic induction element in the outside of the annular magnet, through utilizing magnetic induction element's magnetic induction principle, therefore, when screwing up the screw, staff pressure makes the screwdriver main shaft drive the annular magnet axial displacement is close to when magnetic induction element, magnetic induction element can feed back a signal to control circuit, and then drive the screwdriver main shaft rotation through control circuit control motor; when the screw is screwed, the screwdriver spindle drives the annular magnet to move axially and far away from the magnetic induction element, the magnetic induction element can feed back a signal to the control circuit, and then the control circuit controls the motor to drive the screwdriver spindle to stop rotating. Therefore, the motor can be automatically controlled to start or stop before and after screwing, the purpose of automatically screwing is achieved, and the screw screwing machine is simple and convenient to use.

Preferably, the magnetic induction element is a hall element.

An electric screwdriver comprises a screwdriver main body, and a screwdriver main shaft, a motor, a control circuit board and a switch device which are arranged on the screwdriver main body; the screwdriver main shaft can rotate around the central shaft of the screwdriver main shaft and axially slide; the output end of the motor is connected with the screwdriver spindle and electrically connected with the control circuit board; switching device includes ring magnet and magnetic induction element, ring magnet cup joints and is fixed in outside the screwdriver main shaft, magnetic induction element is located the outside of screwdriver main shaft is fixed in the inner wall of screwdriver main part, magnetic induction element with the control circuit board electricity is connected, with the screwdriver main shaft drives ring magnet is close to time control the motor starts, or is in the screwdriver main shaft drives ring magnet controls when keeping away from the electric motor stops.

Preferably, the magnetic induction element is a hall element.

Preferably, a connecting shaft is arranged between the output end of the motor and the screwdriver spindle, one end of the connecting shaft is connected with the output end of the motor, and the other end of the connecting shaft is connected with the screwdriver spindle in a sliding manner. The connecting shaft is arranged, so that the screwdriver spindle can be connected with the motor to realize rotation, and can not interfere with the motor when axially sliding, and the annular magnet and the magnetic induction element generate a trigger signal when relatively moving.

Specifically, the connecting shaft is provided with a connecting hole, a limiting groove which extends axially is arranged in the connecting hole, and a limiting part which is in sliding fit with the limiting groove is arranged on the side wall of the screwdriver spindle.

Preferably, the side wall of the screwdriver main body is provided with a mounting seat, the mounting seat is provided with an accommodating cavity communicated with the outside, and the magnetic induction element is arranged in the accommodating cavity. The mounting seat can protect the magnetic induction element, and can also enable the magnetic induction element to be conveniently mounted or detached on the screwdriver main body, so that the convenience of maintenance is improved.

Specifically, the mounting seat is detachably arranged on the screwdriver main body through a connecting piece.

Preferably, the screwdriver further comprises a reset elastic piece, and the reset elastic piece is arranged between the screwdriver main body and the screwdriver main shaft so that the screwdriver main shaft extends out of the screwdriver main body.

Specifically, a linkage shaft is arranged between the output end of the motor and the connecting shaft, and the end face of one end of the linkage shaft is slidably abutted against the end face of one end of the connecting shaft; still be equipped with the aperture in the connecting hole, be equipped with compression spring in the aperture, compression spring support in between the connecting axle with the screwdriver main shaft for the terminal surface of connecting axle with the terminal surface of universal driving shaft is contradicted.

Drawings

Fig. 1 is an internal structure view of the electric screwdriver of the present invention.

Fig. 2 is a state diagram of the switch device when the electric screwdriver of the present invention is not screwed.

Fig. 3 is a state diagram of the switch device when the electric screwdriver of the utility model screws.

Detailed Description

In order to explain technical contents, structural features, and effects achieved by the present invention in detail, the following description is given in conjunction with the embodiments and the accompanying drawings.

As shown in fig. 1 and 2, the electric screwdriver 100 of the present invention includes a screwdriver body 1, and a screwdriver spindle 2, a reset elastic member 3, a motor 4, a control circuit board, and a switch device 5 disposed thereon; the screwdriver spindle 2 can rotate around the central axis of the screwdriver spindle and axially slide; the reset elastic piece 3 is arranged between the screwdriver main body 1 and the screwdriver main shaft 2, so that the screwdriver main shaft 2 automatically extends out of the screwdriver main body 1; the reset elastic part 3 is a compression spring and is sleeved outside the screwdriver spindle 2. The output end of the motor 4 is connected with the screwdriver spindle 2 and electrically connected with the control circuit board; the switch device 5 includes a ring magnet 51 and a magnetic induction element 52, and the magnetic induction element 52 is a hall element. Annular magnet 51 cup joints and is fixed in outside the screwdriver main shaft 2, magnetic induction element 52 is located the outside of screwdriver main shaft 2 is fixed in the inner wall of screwdriver main part 1, magnetic induction element 52 with control circuit board electricity is connected, with screwdriver main shaft 2 drives annular magnet 51 is close to the time control motor 4 starts, or is in screwdriver main shaft 2 drives annular magnet 51 controls when keeping away from the electricity stops.

Referring to fig. 1, a connecting shaft 6 is disposed between the output end of the motor 4 and the screwdriver spindle 2, one end of the connecting shaft 6 is connected to the output end of the motor 4, and the other end of the connecting shaft 6 is slidably connected to the screwdriver spindle 2. The connecting shaft 6 is arranged to enable the screwdriver spindle 2 to be connected with the motor 4 to realize rotation, and to be free from interference with the motor 4 when axially sliding, so that the annular magnet 51 and the magnetic induction element 52 generate a trigger signal when relatively moving. The connecting shaft 6 is provided with a connecting hole 61, a limiting groove 61a extending axially is arranged in the connecting hole 61, and a limiting part 2a in sliding fit with the limiting groove 61a is arranged on the side wall of the screwdriver spindle 2. A linkage shaft 7 is arranged between the output end of the motor 4 and the connecting shaft 6, and the end face of one end of the linkage shaft 7 is slidably abutted against the end face of one end of the connecting shaft 6; a small hole 62 is further formed in the connecting hole 61, a compression spring 63 is arranged in the small hole 62, and the compression spring 63 abuts against the space between the connecting shaft 6 and the screwdriver spindle 2, so that the end face of the connecting shaft 6 abuts against the end face of the linkage shaft 7 with certain pressure. The linkage shaft 7 can drive the connecting shaft 6 to rotate through sliding friction force so as to output a certain torque.

Referring to fig. 1 and 2, a mounting seat 8 is disposed on a side wall of the screwdriver main body 1, the mounting seat 8 is detachably disposed on the screwdriver main body 1 through a connecting member 9, and the connecting member 9 is a connecting screw. The mounting seat 8 is provided with an accommodating cavity 81 communicated with the outside, and the magnetic induction element 52 is arranged in the accommodating cavity 81. The mounting seat 8 can protect the magnetic induction element 52, and can also facilitate the mounting or dismounting of the magnetic induction element 52 to the screwdriver body 1, thereby improving the convenience of maintenance.

In summary, the working principle of the electric screwdriver 100 of the present invention is described in detail as follows:

as shown in fig. 3, when a screw needs to be screwed, the outer end of the screwdriver spindle 2 is aligned with the screw and matched with the screw, and then the screwdriver spindle 2 is pressed downward with force, so that the screwdriver spindle 2 retracts into the screwdriver body 1, at this time, the screwdriver spindle 2 drives the annular magnet 51 to move axially and face the magnetic induction element 52, the magnetic induction element 52 senses the annular magnet 51 and generates a signal, the motor 4 is controlled by the control circuit board to start, the motor 4 drives the linkage shaft 7 to rotate, the linkage shaft 7 drives the connecting shaft 6 to rotate, and the connecting shaft 6 can drive the screwdriver spindle 2 to rotate, so as to realize the action of screwing the screw. When the screw is tightened, the generated load is larger than the torque output by the screwdriver spindle 2, at this time, the linkage shaft 7 and the connecting shaft 6 slide, and although the motor 4 continues to drive the linkage shaft 7 to rotate, the connecting shaft 6 cannot rotate, so that the motor 4 and the screwdriver spindle 2 are protected.

After the screw is screwed, the screwdriver spindle 2 is separated from the screw, at this time, the pressure applied to the screwdriver spindle 2 disappears, the screwdriver spindle 2 extends out of the screwdriver body 1 again under the elastic acting force of the reset elastic part 3, and simultaneously drives the annular magnet 51 to move, so that the annular magnet 51 and the magnetic induction element 52 are staggered and separated by a certain distance, at this time, the magnetic induction element 52 senses that the annular magnet 51 is separated to generate another signal, and further the motor 4 is controlled to stop through the control circuit board, and at this time, the linkage shaft 7, the linkage shaft and the screwdriver spindle 2 can stop rotating.

Compared with the prior art, because the utility model discloses set up an annular magnet 51 outside screwdriver main shaft 2, and set up magnetic induction element 52 in the outside of annular magnet 51, through utilizing the magnetic induction principle of magnetic induction element 52, consequently, when screwing up the screw, the staff pressure makes screwdriver main shaft 2 drive annular magnet 51 axial displacement is close to when magnetic induction element 52, magnetic induction element 52 can feed back a signal to the control circuit board, and then drive screwdriver main shaft 2 rotates through control circuit board control motor 4; when the screw is screwed, the screwdriver spindle 2 drives the annular magnet 51 to move axially and away from the magnetic induction element 52, the magnetic induction element 52 can feed back a signal to the control circuit board, and the control circuit board controls the motor 4 to drive the screwdriver spindle 2 to stop rotating. Therefore, the motor 4 can be automatically controlled to start or stop before and after screwing, the purpose of automatically screwing is achieved, and the screw screwing machine is simple and convenient to use.

The induction principle of the magnetic induction element 52 and the control principle of the control circuit board related to the electric screwdriver 100 of the present invention are well known to those skilled in the art, and will not be described in detail herein.

The above disclosure is only a preferred embodiment of the present invention, and certainly, the scope of the present invention should not be limited thereto, and therefore, the scope of the present invention is not limited to the above embodiments.

Claims (10)

1. The utility model provides an electric screwdriver switching device for control screwdriver main shaft starts or stops to rotate which characterized in that: including ring magnet and magnetic induction element, the screwdriver main shaft is setting with endwise slip, ring magnet cup joints and is fixed in outside the screwdriver main shaft, magnetic induction element set up in ring magnet's the outside, with the screwdriver main shaft drives ring magnet is close to time control the screwdriver main shaft rotates, or is in the screwdriver main shaft drives ring magnet is kept away from time control the screwdriver main shaft stall.

2. The electric screwdriver switching device of claim 1, wherein: the magnetic induction element is a Hall element.

3. An electric screwdriver is characterized in that: the screwdriver comprises a screwdriver main body, and a screwdriver main shaft, a motor, a control circuit board and a switch device which are arranged on the screwdriver main body; the screwdriver main shaft can rotate around the central shaft of the screwdriver main shaft and axially slide; the output end of the motor is connected with the screwdriver spindle and electrically connected with the control circuit board; switching device includes ring magnet and magnetic induction element, ring magnet cup joints and is fixed in outside the screwdriver main shaft, magnetic induction element is located the outside of screwdriver main shaft is fixed in the inner wall of screwdriver main part, magnetic induction element with the control circuit board electricity is connected, with the screwdriver main shaft drives ring magnet is close to time control the motor starts, or is in the screwdriver main shaft drives ring magnet controls when keeping away from the electric motor stops.

4. The electric screwdriver as set forth in claim 3, wherein: the magnetic induction element is a Hall element.

5. The electric screwdriver as set forth in claim 3, wherein: the screwdriver is characterized in that a connecting shaft is arranged between the output end of the motor and the screwdriver spindle, one end of the connecting shaft is connected with the output end of the motor, and the other end of the connecting shaft is connected with the screwdriver spindle in a sliding mode.

6. The electric screwdriver as claimed in claim 5, wherein: the connecting shaft is provided with a connecting hole, a limiting groove extending axially is arranged in the connecting hole, and a limiting part in sliding fit with the limiting groove is arranged on the side wall of the screwdriver spindle.

7. The electric screwdriver as set forth in claim 3, wherein: the lateral wall of screwdriver main part is equipped with the mount pad, the holding chamber in the intercommunication outside is seted up to the mount pad, place in the magnetic induction element the holding intracavity.

8. The electric screwdriver as claimed in claim 7, wherein: the mounting seat is detachably arranged on the screwdriver main body through a connecting piece.

9. The electric screwdriver as set forth in claim 3, wherein: still include the elastic component that resets, the elastic component that resets set up in screwdriver main part with between the screwdriver main shaft, so that the screwdriver main shaft stretches out the screwdriver main part.

10. The electric screwdriver as set forth in claim 6, wherein: a linkage shaft is arranged between the output end of the motor and the connecting shaft, and the end face of one end of the linkage shaft is slidably abutted against the end face of one end of the connecting shaft; still be equipped with the aperture in the connecting hole, be equipped with compression spring in the aperture, compression spring support in between the connecting axle with the screwdriver main shaft for the terminal surface of connecting axle with the terminal surface of universal driving shaft is contradicted.

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