CN201067877Y

CN201067877Y - Power-assisted screwdriver

Info

Publication number: CN201067877Y
Application number: CNU2007200041505U
Authority: CN
Inventors: 孙福超
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-01-30
Filing date: 2007-01-30
Publication date: 2008-06-04
Anticipated expiration: 2017-01-30

Abstract

An aided screw driver of the utility model relates to a portable electric tool used for assembling and disassembling the fasteners with threads. The aided screw driver takes the home-made rechargeable battery as the power source, the home-made micro-motor as the power and the star type gear mechanism to slow down to output a torque and speed ( the empty load is bigger than 180 rpm, while the torque is bigger than 1.5 to 8 kg. cm). The aided screw driver is an electric tool formed by combining a rotary control switch, a lighting system and a self-lock device. The reversible rotary control switch conveniently and flexibly controls the driving in clockwise / counterclockwise direction. The purpose of quickly tightening or disassembling screws or bolts is achieved. The self-lock device can ensure the demand of rotation shearing by manpower. The independent lighting system at the front end can meet the demand for clearly seeing objects and lighting. The device is small in volume, light in weight, convenient for being carried and low in cost and the volume of the device is only as big as a common screw, furthermore, the utility model assembles and disassembles screw fasteners with less labor and time, reduces labor intensity and improves working efficiency. The operation is simple and can be completed by one hand. The aided screw driver is safe and reliable, which is especially suitable for maintenance personnel to use, and the utility model is a good helper for mechanic.

Description

The power-assist screwdriver

Technical field:

The invention of the utility model power-assist screwdriver relates to the electric tool of electric tool, especially portable, battery powered.

Background technology:

At present, along with the development of society, efficient is wanted in the work work, quality.For this reason, various tool is that productive labor brings convenience.As the saying goes, skillful with one's hands not as utensils wonderful.Can increase work efficiency and quality, the instrument that reduces labor intensity is required for people.Various electric tools reduce labor intensity for people, increase work efficiency, and are bringing into play important effect.It is exactly the most frequently used a kind of that electric screw is criticized.But it is big that general electric screw is criticized volume, is not easy to carry, and generally is used on the stationary work-table.The charged electric screwdriver is easy to carry.But it is still bigger that present electric screw is criticized volume, and still some limitation operates.Screw or bolt as long embroider extremely or too tight of time, also need with normal screws cutter manpower it to be become flexible and use electric screw again instead and criticize and unload for various reasons.Tighten up a screw or bolt, when a lot, electric screw is criticized to tighten also to be needed to change into normal screws and criticizes with manpower and tighten.It is very inconvenient to operate, and the utility model solves problem exactly.

Summary of the invention:

Power-assist screwdriver volume is little, and the combined screw of profile and common standard is criticized the same substantially size, and weight is also similar.Rotary switc is not exactly that the combined screw of standard is criticized, and available manpower carries out turn.Have slightly under the loosening situation at screw or bolt, rotary switc is exactly that electric screw is criticized, and unloads apace or tightens.Follow one's bent, handle very skillfully, raise the efficiency and reduce labor intensity, easy to operate, in gloomy occasion or because lighting button is pressed in the black place that does not see, be exactly illuminations.The illumination operation can be carried out simultaneously.The purpose of this utility model is the labour intensity that alleviates people, increases work efficiency, and shortens working hours, and is particularly suitable for maintenance work, is skilled worker personnel's good assistant.

The utility model is to adopt such method to realize: as the drive power source micromachine, export needed moment of torsion and speed by the star gear train reducing gear with battery, drive tool heads and be rotated.Also open self-locking device simultaneously by reversible rotary switch control direction of rotation, reach the purpose that tightens or unload screw or bolt fast.The illuminator that is positioned at front end can help people to see object clearly, for work and operation bring convenience.Above process can be finished the operation of overall process easily with a hand.

Description of drawings:

The Fig. 1 that bows is the basic appearance and size of power-assist screwdriver and the relative position of each parts.

Accompanying drawing 2 is self-locking devices of power-assist screwdriver, the profile of each parts relevant position of rotary switch and illuminator.

Accompanying drawing 3 is the button of [1] illuminator of criticizing of power-assist mule silk and the relative position of luminous tube.[2] rotary switch and illuminator shared one each wiring board, wiring board just.Reverse side trend and wiring schematic diagram.

The specific embodiment:

[this battery volume is little, and charge capacity is big, environmental protection with the single-unit lithium battery, life-span is long, operating current is big, the use of can charging repeatedly, voltage is high 3.7 volts] [motor adopts 130 to drive micromachine, 180 series or 260,280 series], by the star gear train reduction box, export the rotating speed of big what 180rpm and the moment of torsion of big what 1.5kg.cm, the related anchor clamps of output shaft can press from both sides various needed tool heads.More than be to arrange in proper order in same axle center.See Fig. 1

Self-locking device of design on output shaft.When motor did not turn round, self-locking device pinned output shaft.Inactive.Whole system is equivalent to a solid members, and similar one criticizes normal screws, and available manpower carries out turn-knob to be used.Work as rotary switch, connect power supply, starter motor is opened self-locking device by rotary switch simultaneously, loosens output shaft, the work of power-assist screwdriver.Loose one's grip, rotary switch automatic homing, deenergization, self-locking device pin output shaft again automatically, prevent that output shaft from rotating.

Self-locking device is by 4 symmetrical lock pawls, lock wheel, spring, the recessed composition of taking turns of stage clip and rotary switch cam and self-locking.See when Fig. 2 is static that 4 lock pawls are caught the lock wheel under the effect of stage clip.The lock wheel is fixed on the output shaft.Output shaft can not be rotated, reach fixing purpose of pinning.When rotary switch rotates [suitable, contrary all can], the cam on the rotary switch presses recessed the wheel, makes recessed the wheel carry out translational motion.The recessed wheel utilizes the bar rod principle to lift the lock pawl, and 4 lock pawls loosen the lock wheel, and output shaft can be rotated motion.Loose one's grip and loosen rotary switch, the recessed wheel under lock pawl stage clip and the recessed effect of taking turns spring carried out translation, gets back to original position.Simultaneously recessed take turns and rotating cam makes rotary switch get back to original position.Deenergization.The lock pawl is caught the lock wheel again under the effect of stage clip, output shaft is pinned.

Rotary switch clockwise rotates, and motor changes clockwise, and output shaft also changes clockwise.Rotary switch rotates counterclockwise.Motor also changes counterclockwise, and output shaft equally also changes counterclockwise.

Rotary switch is by swiveling wheel, and the two pairs of contacts and 4 two groups of symmetry contact chips that are grouped into such as 4 in the circuit board form.One winding contact connects the positive and negative level of power supply [battery], another winding motor.See when Fig. 3 is static that the two pairs of contacts and two winding contacts are discontiguous.Motor and power supply disconnect.When rotating swiveling wheel, two pairs of contacts that are fixed on the swiveling wheel also follow swiveling wheel to carry out circular motion, and the contact contacts with contact chip, and motor and power supply form the loop, the motor rotation.When clockwise rotating swiveling wheel, a of motor point connects the positive pole of power supply, and the b point connects the negative pole of power supply.When rotating counterclockwise swiveling wheel, just in time opposite, the b point of motor connects the positive pole of power supply,, a point of motor connects the negative pole of power supply, is just reaching motor. the purpose of opposite direction motion.

Power-assist screwdriver front end is provided with the illumination accessory system, sees the usefulness of object and illumination clearly with helping people.Do not establish power supply in addition, a public power supply.

The illumination accessory system is made up of two high brightness LEDs and shift knob and wiring board.The direction of illumination is parallel to output shaft.Light emitting diode and switch all are to fix in the circuit board.See that Fig. 4 presses button, high brightness LED is luminous.Public one of illuminating line plate and rotary switch wiring board.

The arrangement of whole system is on same axle.----motor----star-like reduction box----self-locking device----rotary switch----illumination accessory system----output shaft----anchor clamps----tool heads puts in order: battery.

Claims

1. power-assist screwdriver, order is arranged battery-motor-star-like reduction box-self-locking device-rotary switch-illumination accessory system-output shaft-anchor clamps-tool heads in shell, it is characterized in that: just controlling despining direction and floor light by self-locking device and rotary switch.

2. according to claim 1 described power-assist screwdriver, it is characterized in that: by 4 symmetrical lock pawls, lock wheel, self-locking spring, stage clip, the recessed self-locking device of taking turns composition of rotating cam and self-locking.

3. according to claim 1 described power-assist screwdriver, it is characterized in that: by rotating cam, the two pairs of contacts and 4 are two groups of rotary switches that the symmetry contact chip is formed that are grouped into such as 4 in the circuit board.

4. according to claim 1 described power-assist screwdriver, it is characterized in that: by two high brightness light emitting diodes, the illumination accessory system that shift knob and wiring board are formed.