CN201511332U - Novel electric screwdriver - Google Patents

Abstract

The utility model relates to an electric tool technical field refers in particular to a novel electric screwdriver, it includes the casing, clutch, transmission, drive arrangement, the sensor, be equipped with clutch in the casing, transmission, drive arrangement's output is connected with transmission, clutch is connected to transmission's output, clutch comprises separation and reunion cup, the sensor, it has the cup ear to take shape on the separation and reunion cup, the cup ear is hugged closely to the sensor, it is porose to set up on the separation and reunion cup circumference, be equipped with elastic locking device on the shell body, its structural design is simple science, easy assembly, the precision is high, long service life.

Description

A kind of electric screw driver

Technical field:

The utility model relates to the electric tool technical field, refers in particular to a kind of electric screw driver.

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 a kind of electric screw driver 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 housing, arrangement of clutch, transmission device, drive unit, sensor, is provided with arrangement of clutch, transmission device, drive unit in the housing, and the output of drive unit is connected with transmission device, the output of transmission device connects arrangement of clutch, arrangement of clutch is made of clutch cup, sensor, is formed with a glass ear on the clutch cup, and sensor is close to a glass ear, offer porosely on the clutch cup circumference, shell body is provided with the snap lock device.

Described holder is fixed on the shell body of transmission device, and sensor is fixed on is close to a glass ear on the holder.

Offer containing hole on the described shell body, mounting spring and steel ball constitute the snap lock device in the containing hole.

Described sensor is a Hall element.

Described drive unit is non-carbonate motor.

The utility model beneficial effect is: the output of transmission device connects arrangement of clutch, arrangement of clutch is made of clutch cup, sensor, be formed with a glass ear on the clutch cup, sensor is close to a glass ear, offer and the hole on the clutch cup circumference, shell body is provided with the snap lock device, when easy assembling, precision height, long service life.

Description of drawings:

Fig. 1 is a structural representation of the present utility model;

Fig. 2 is the cutaway view of internal structure of the present utility model;

Fig. 3 is a decomposition texture schematic diagram of the present utility model;

Fig. 4 is the structural representation of the utility model clutch cup;

Fig. 5 is the structural representation of the utility model drive housing body;

The specific embodiment:

See that Fig. 1 is to shown in Figure 5: the utility model comprises housing 1, arrangement of clutch 200, transmission device 6, drive unit 5, sensor 8, be provided with arrangement of clutch 200, transmission device 6, drive unit 5 in the housing 1, the output of drive unit 5 is connected with transmission device 6, the output of transmission device 6 connects arrangement of clutch 200, arrangement of clutch 200 is made of clutch cup 9, sensor 8, be formed with glass ear 91 on the clutch cup 9, sensor 8 is close to glass ear 91, offer porosely 92 on clutch cup 9 circumference, shell body 82 is provided with snap lock device 300.

Described holder 81 is fixed on the shell body 82 of transmission device 6, and sensor 8 is fixed on is close to glass ear 91 on the holder 81.

Offer containing hole 85 on the described shell body 82, mounting spring 84 constitutes snap lock device 300 with steel ball 83 in the containing hole 85.

Described sensor 8 is a Hall element.

Described drive unit 5 is non-carbonate motor.

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 3, drive unit 5, torsion output shaft 7 also stops the rotation, at this moment the output shaft of gear-box of transmission device 6 and arrangement of clutch 200 drive still in rotation, transmission device 6 devices can drive steel ball 6 motions, promoting arrangement of clutch 200 moves downward, mounting spring 84 driving steel balls 83 move in containing hole 85 in the containing hole 85, steel ball 83 cooperates with hole 92 on the clutch cup 9, shell body 82 rotates under the driving of drive unit 5, revolution moves a week, steel ball 83 can enter in the hole 92 on the clutch cup 9 once, in the time of in steel ball 83 leaves hole 92, make clutch cup 9 also can leave fixed mount 102 like this and form a space, sensor 8 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, carrying out signal by control circuit handles and analyzes, when moving downward the analog signal voltage changing value that reaches 8 outputs of maximum sensor, clutch cup 9 is maximum at this moment, the control circuit of circuit board, the value of this moment is Vmax or Vmin, Vmax or Vmin are relevant with the position relation of sensor 8, along with voltage swing changes and changes of magnetic field, when clutch cup 9 can be with the shell body 82 of transmission device 6 and closed, the time and form the gap, thereby arrangement of clutch 200 can be controlled the rotation of torsion output shaft 7 and stop, and at this moment the return springs 10 in the fixed cover 2 can play the effect of clutch cup 9.

The utility model housing 1 is provided with start stop switch 11, and the afterbody of housing 1 is provided with hook 4, but start stop switch 11 accessory drives 5 are worked and stopped.

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 (5)

1. A novel electric screwdriver, which comprises a housing (1), a clutch (200), a transmission (6), a drive (5), a sensor (8), and the housing (1) is provided with a clutch ( 200), transmission device (6), driving device (5), the output end of driving device (5) is connected with transmission device (6), it is characterized in that: the output end of transmission device (6) is connected with clutch device (200), The clutch device (200) is made of a clutch cup (9) and a sensor (8). The clutch cup (9) is formed with a cup ear (91), and the sensor (8) is close to the cup ear (91). The circumference of the clutch cup (9) A hole (92) is opened on the top, and an elastic locking device (300) is provided on the outer casing (82). 2. A new type of electric screwdriver according to claim 1, characterized in that: the fixed seat (81) is fixed on the outer shell (82) of the transmission device (6), and the sensor (8) is fixed on the fixed seat (81) is close to the cup ear (91). 3. A new type of electric screwdriver according to claim 1, characterized in that: the housing (82) is provided with an accommodating hole (85), and a spring (84) and a spring (84) are installed in the accommodating hole (85). Steel ball (83) constitutes elastic lock device (300). 4. A new type of electric screwdriver according to claim 1, characterized in that: said sensor (8) is a Hall sensor. 5. A new type of electric screwdriver according to claim 1, characterized in that: said driving device (5) is a brushless motor.

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