CN2670060Y

CN2670060Y - Electric spanner

Info

Publication number: CN2670060Y
Application number: CNU032450702U
Authority: CN
Inventors: 毛大鹏
Original assignee: Individual
Current assignee: Individual
Priority date: 2003-04-11
Filing date: 2003-04-11
Publication date: 2005-01-12
Anticipated expiration: 2013-04-11

Abstract

The utility model relates to an electric spanner, which comprises a drive part, a rotating part, an electric appliance control part and an illumination part, wherein, the drive part is composed of a permanent magnetic miniature motor (5) with a direct current of 12 volt, and the rotating part is composed of a flywheel (7), a friction wheel (6), a swinging block (8), a steel ball (9), a spring (10), a set screw (11), a connecting rod (12) and a rotating main shaft (14). The torsional force is outputted by the connection of a bearing and other parts, the electric appliance control part is composed a single-chip microcomputer main board (4), a force moment selecting switch (1), a positive rotating switch (2), a contrarotation switch (3), an electromagnet (13) and a tachometer (15), and the illumination part is composed of a luminous tube (16) with highlight. The flywheel (7) is driven to rotate by the motor (5) through the friction wheel (6), and the output of the force moment is controlled by the single-chip microcomputer (4) and the electromagnet (13). The utility model has the advantages of small volume, simple structure, reliable function, adjustable force moment, and the utility model is easy in use with the stable and accurate output of the force moment.

Description

Electric wrench

[technical field]

The utility model relates to a kind of electric tool, particularly, relates to a kind of electric wrench.

[background technology]

Spanner is the instrument of using always, there is the little and unsettled defective of starting power in general manual wrench, existing electric wrench exists volume big because electric machine external connects by external gear between motor and the flywheel, use inconvenient defective, and existing electric wrench is with the initial position of extension spring control swing, and complex structure is bulky, life-span is short, and moment output is unstable

[summary of the invention]

The problem that the utility model need solve just is to overcome the deficiency of existing electric wrench, and the electric wrench that a kind of volume is little, easy to use, moment output is stable is provided.

For addressing the above problem, the utility model adopts following technical scheme:

Electric wrench, it comprises a moment selector switch, a positive turn-off pass, a reversal switch, a motor, described moment selector switch, positive turn-off pass, reversal switch, motor all are electrically connected with the single-chip microcomputer mainboard; Also comprise main shaft with the motor output shaft coaxial line, eccentric lobe is arranged on the main shaft, main shaft does not contact flywheel of suit outward with one heart, a friction pulley is installed on the motor output shaft, with the concentric suit of flywheel CONTACT WITH FRICTION, a centering block is set in the described flywheel, centering block is movable asymmetric circular arc, a jackscrew also is set in the described flywheel, there is a spring jackscrew below, described spring below, centering block and movable steel ball of flywheel lower surface junction clamping, a connecting rod is set on the centering block, and flywheel is outer to be provided with an electromagnet over against connecting rod, and described electromagnet and single-chip microcomputer mainboard are electrically connected, described flywheel also has a rotating speed device outward, and described rotating speed device is electrically connected with the single-chip microcomputer mainboard.

The utility model motor is a dc micro-motor, and single-chip microcomputer mainboard chip is the J1A of a Motorola type.

When motor is not worked, limit because of being subjected to the steel ball in the flywheel, centering block is static.

After connecting power supply, the forward or reverse switch is connected in setting moment selector switch position, and motor rotates, and drives friction pulley, and friction pulley is connected the drive flywheel with the flywheel friction and rotates.

When the flywheel rotating speed reaches the rotating speed of moment selector switch setting, the single-chip microcomputer mainboard is connected electromagnet power supply, electromagnet is started working, connecting rod on the electromagnet bump centering block makes centering block lose the steel ball location, and the centrifugal force that produces on the centering block is swung by centering block, centering block is contacted with the spindle eccentricity projection, the flywheel rotation function is delivered on the main shaft, and main shaft begins to rotate, and plays installation, dismounting effect.

Advantage of the present utility model is:

1, realize connecting in the motor, volume is little, use, easy to carry, and motor is a dc micro-motor, can use automobile power source easily.

2, by the friction pulley transferring power, the resistance of start is little, the motor long service life.

3, centering block is by steel ball control location, and simple in structure by magnet control work, volume is little, and the life-span is long, and moment output is stable.

[description of drawings]

Accompanying drawing is the utility model structural representation.

[specific embodiment]

As shown in the figure, electric wrench described in the utility model, it comprises that a moment selector switch 1, positive turn-off close 2, reversal switches 3, a motor 5, and described moment selector switch, positive turn-off pass, reversal switch, motor all are electrically connected with single-chip microcomputer mainboard 4; Also comprise main shaft 14 with the motor output shaft coaxial line, eccentric lobe is arranged on the main shaft, main shaft does not contact flywheel 7 of suit outward with one heart, a friction pulley 6 is installed on the motor output shaft, with the concentric suit of flywheel CONTACT WITH FRICTION, a centering block 8 is set in the described flywheel, centering block is movable asymmetric circular arc, a jackscrew 11 also is set in the described flywheel, there is a spring 10 the jackscrew below, described spring below, movable steel ball 9 of centering block and the junction clamping of flywheel lower surface, a connecting rod 12 is set on the centering block, and flywheel is outer to be provided with an electromagnet 13 over against connecting rod, and described electromagnet and single-chip microcomputer mainboard are electrically connected, described flywheel also has a rotating speed device 15 outward, and described rotating speed device is electrically connected with the single-chip microcomputer mainboard.

Claims

1, a kind of electric wrench, particularly by the electric wrench of monolithic processor controlled exportable multiple moment, the main shaft that comprises a motor and motor coaxle line, eccentric lobe is arranged on the main shaft, main shaft does not contact flywheel of suit outward with one heart, a centering block is set in the flywheel, and described centering block is movable asymmetric circular arc, it is characterized in that; A friction wheel is installed on the motor shaft contacts concentric suit with described flywheel friction, a spring is set in the described flywheel, described spring below, centering block and movable steel ball of flywheel lower surface junction clamping, a connecting rod is set on the centering block, flywheel is outer to be provided with an electromagnet over against connecting rod, described electromagnet and single-chip microcomputer mainboard are electrically connected, and described flywheel also has a rotating speed device outward, and the rotating speed device is electrically connected with the single-chip microcomputer mainboard.

2, claim 1 described electric wrench is characterized in that: described single-chip microcomputer is the J1A of a Motorola type.