CN2631691Y

CN2631691Y - Electric tool for dismounting bolt

Info

Publication number: CN2631691Y
Application number: CN 03255828
Authority: CN
Inventors: 方福根; 周土生
Original assignee: Individual
Current assignee: ZHEJIANG LIFUTE MECHANICAL CO Ltd
Priority date: 2003-07-22
Filing date: 2003-07-22
Publication date: 2004-08-11
Anticipated expiration: 2013-07-22

Abstract

The utility model relates to an electric tool which is used for fast disassembling and installing threaded bolts. The bolt disassembly and assembly tool includes an electrical motor, a turntable of the reducing mechanism, a principle axis and a shell. The reducing mechanism is composed of a small gear wheel of the output shaft of the electrical motor and a big gear wheel arranged at the turntable. The right side of the turntable is equipped with a plurality of dead holes. Inside the dead holes is a spring. The spring has steel beads. The left side of the big gear wheel is compressed by the steel beads. The axle of the right side of the turntable is covered by the big gear. Once the turning speed is reduced to a great extent, a great torsion moment is formed, which causes the turntable and the big gear to counter rotate and therefore the impact load is greatly cushioned.

Description

A kind of electric tool of rolling over the dress bolt

Technical field

The utility model relates to a kind of folding assembling device of rolling over the dress bolt, relates in particular to the electric tool of quick demolition or construction bolt.

Technical background

At the electric tool of the folding dress bolt that uses, its form also has a lot at present, and its operation principle is roughly the same.The sort of wheeled electric tool of when folding dress doughnut, using particularly.Usually in this electric tool, all by a direct current generator.An output shaft is arranged on the motor.A pinion on the axle, drive a gear wheel in order to slow down again by it, gear wheel is installed on the rotating disk, rotating disk is just along with gear quick rotation together, in rotating disk, on the position of symmetry a pair of impact block is arranged, impact block flexibly connects by eccentric pin shaft and rotating disk, when rotating speed increases sharply, because centrifugal action.Impact block will overcome cross-over connection stage clip elastic force thereon, and making a side of impact block is fulcrum with the eccentric pin shaft, throws out along the centrifugal force direction, opposite side is then bitten projection on the main shaft towards rotating disk medial movement ， And, makes main axis rotation, be with impact wrench on the main shaft, can adorn the folding bolt.The shortcoming of this device: when folding dress bolt, because moment of torsion is bigger, make the high speed rotation moment vanishing of main shaft, infringement to big pinion and motor is very big, and travelling gear is destroyed, in order to slow down this shock loading when folding is adorned bolt, someone is provided with some damping structures between rotating disk and gear wheel, or complex structure, or poor effect, all undesirable.

Summary of the invention

The technological deficiency that the utility model exists at above-mentioned electric tool, designed a kind of electric tool of rolling over the dress bolt, it is by motor, reducing gear, rotating disk, main shaft and shell are formed, reducing gear is made up of pinion on the motor output shaft and the gear wheel that is installed on the rotating disk, be provided with a pair of impact block in the rotating disk, on the right flank on the rotating disk, be provided with several blind holes, spring is housed in the blind hole, is pressed with steel ball on the spring, the corresponding blind hole of several diameters that be provided with on the plane, gear wheel left side less than steel ball, the plane, left side and the steel ball of gear wheel press, and gear wheel is sleeved on the axle on rotating disk right side.Be provided with a groove on the cylindrical of the axle head on rotating disk right side, card has snap on the groove.Be provided with a pair of impact block on the hollow part symmetric position on the rotating disk, by eccentric pin shaft impact block be hinged on the rotating disk, the side on the impact block is compressed by a torsion spring respectively, and opposite side rests on the pillar.At the center of rotating disk one main shaft is installed, the main shaft section that is positioned at rotating disk be provided with a symmetry with the impact block cam of interlock mutually.

The advantage of the utility model structure is, when main shaft tighten or lax bolt in a flash because impact load is bigger, easily parts such as gear are caused damage.Because in this structure, there have not been several steel balls on the left side of gear wheel, gear wheel is not fixedlyed connected with Gang Zhu And, when canonical loading increases suddenly, when rotating speed reduces rapidly, the snap-in force of gear wheel and pinion will increase severely, but in the time of will increasing, compress because gear wheel is the steel ball on the pressured spring, this moment of torsion can impel gear wheel to rotate along the steel ball face, when blind hole on the gear wheel end face and steel ball are just in time chimeric, kinetic energy exhausts, stop operating, play cushioning effect, do not cause gear to break.

Description of drawings

Fig. 1 is the utility model example structure schematic diagram;

Fig. 2 is the A-A cross-sectional view of Fig. 1;

Wherein:

Impact block and main spindle's schematic diagram when figure a is unloaded;

Figure b is the impact block and the main spindle's schematic diagram of fastening bolt;

Impact block and main spindle's schematic diagram during figure c demolition bolt.

The specific embodiment

Embodiment below in conjunction with Fig. 1 and Fig. 2 utility model does a detailed description.As shown in Figure 1, this electric tool is specially adapted in the maintenance of automobile.It is by motor 7, reducing gear, rotating disk 2, and main shaft 1 and shell 9 are formed, and reducing gear is made up of pinion on the motor output shaft 65 and the gear wheel that is installed on the rotating disk 2, and they link by a support 11 and are fixed on the housing.During use, as long as supply socket 10 is inserted on the automobile power source, stirring control button 8 still is the demolition bolt to determine to tight a bolt, in case power connection, motor 7 begins to run up, by the pinion on the motor shaft 65, drive the gear wheel on the rotating disk 2, to reach the purpose of deceleration.Gear wheel 13 is sleeved on the hollow shaft 14 of rotating disk 2 right-hand members, be evenly equipped with 4 blind holes on rotating disk 2 right-hand members, be placed with spring 3 in the blind hole respectively, on spring 3, be placed with steel ball 4 respectively, the left side of gear wheel 13 and 4 steel balls near, the gear wheel left side also is provided with the blind hole of 4 diameters less than diameter of the steel ball on the plane, and its position is corresponding with the blind hole position on the plane, rotating disk right side, and the right-hand member of gear wheel 13 is stuck in gear wheel on the hollow shaft 14 by snap 12.Symmetric position on the space in rotating disk 2 is provided with 2 impact blocks 16, impact block 16 is hinged on the rotating disk by eccentric pin shaft 18, impact block 16 1 sides are fixed on the torsion spring 15 of rotating disk and are pressing, opposite side rests on the pillar 19, at the center of rotating disk main shaft 1 is installed, main shaft 1 position that is positioned at rotating disk is provided with the projection 16 of a symmetry.When the starting stage of gear wheel 13 drive rotating disks 2 rotations, the impact block in main shaft 1 and the rotating disk is in disengaged position.When rotary speed increases severely, because action of centrifugal force makes the opposite side of impact block depart from the center.When tighting a bolt, shown in the figure b among Fig. 2, projection and impact block on the main shaft are bitten, go to tight a bolt just drive main shaft 1, in case when tighting a bolt, because throwing-on reduces sharply the rotating disk rotary speed, centrifugal force also reduces sharply.Under the effect of torsion spring, make impact block reset to position shown in figure a.Otherwise when the demolition bolt, the position of impact block and main shaft relation is shown in figure c, and in like manner, after loosering a bolt, impact block also will return to position shown in figure a.

Electric tool of the present utility model, its crux effect is, when when tightening or unscrew, because throwing-on, what rotating speed reduced sharply can make gear in a flash, impact load on the motor is very big, because the gear wheel in this structure abuts against on the steel ball, when in case rotating speed reduces sharply, huge moment of torsion will pass to gear wheel from rotating disk, because gear wheel is connected with rotating disk is non-rigid, impel rotating disk to produce relative rotation with gear wheel, owing on plane, a gear wheel left side, be provided with several blind holes, when steel ball is seated to the blind hole position, just can stop the rotation again, impact load is cushioned greatly less than diameter of the steel ball.

Claims

1, a kind of electric tool of rolling over the dress bolt, by motor, reducing gear, rotating disk, main shaft and shell are formed, reducing gear is made up of pinion on the motor output shaft and the gear wheel that is installed on the rotating disk, is provided with a pair of impact block in the rotating disk, it is characterized in that being provided with on the right flank on the rotating disk several blind holes, spring is housed in the blind hole, be pressed with steel ball on the spring, gear wheel is sleeved on the axle on rotating disk right side, and the plane, left side and the steel ball of gear wheel press.

2, a kind of electric tool of rolling over the dress bolt according to claim 1 is characterized in that the corresponding blind hole of several diameters less than steel ball that be provided with on the plane, gear wheel left side.

3, a kind of electric tool of rolling over the dress bolt according to claim 1 and 2 is characterized in that the cylindrical of the axle head on rotating disk right side is provided with a groove, and card has snap on the groove.

4, a kind of electric tool of rolling over the dress bolt according to claim 1, it is characterized in that on the hollow part symmetric position on the rotating disk, being provided with a pair of impact block, by eccentric pin shaft impact block is hinged on the rotating disk, side on the impact block is compressed by a torsion spring respectively, and opposite side rests on the pillar.

5, according to claim 1 or 4 described a kind of electric tools of rolling over the dress bolt, it is characterized in that one main shaft being installed at the center of rotating disk, the main shaft section that is positioned at rotating disk be provided with a symmetry with the impact block cam of interlock mutually.