CN2287545Y

CN2287545Y - Electric driven spanners

Info

Publication number: CN2287545Y
Application number: CN 97200049
Authority: CN
Inventors: 谢秉臻
Original assignee: Individual
Current assignee: Individual
Priority date: 1997-02-26
Filing date: 1997-02-26
Publication date: 1998-08-12
Anticipated expiration: 2007-02-26

Abstract

The utility model relates to an electrically driven spanner, comprising a casing, a cover, a micromotor, a shifting fork mechanism, a moving pin plate, a flywheel body, a collide block, a torsion head, a two-direction switch, a starting switch and four kinds of standard sleeve barrels, wherein, the shifting fork mechanism is composed of a stand frame, a shifting fork, two tension springs, two small shafts and a counterweight plate. A direct current power supply of 12V on an automobile can be used, and a screw nut can be conveniently and rapidly dismounted or fastened, so that labor intensity can be reduced. The utility model has the advantages of artful structure and reliable motions.

Description

Electric wrench

The utility model relates to a kind of electric tool, but especially a kind of spanner of automatic clutch that is applicable to loading and unloading tires such as car, minibus, station wagon and twists the usefulness of other nut.

Along with Chinese economic development, car just progressively enters into family.Handle for the maintaining of car and the road breakdown that travels, carrying maintenance tool such as spanner with car is that the driver is requisite.And now the instrument of twisting nut commonly used has double offset ring spanner and box spanner, mostly is hand-operated tools, run into to use neither when needing re-type, dismounting nut that the side makes, the gas of requiring great effort again, especially the female driver to run into this situation powerless especially.

The purpose of this utility model is to design a kind of convenient and swift, time saving and energy saving electric wrench, the usefulness of keeping in repair car in order to the driver.

The technical solution of the utility model provides with following form: it comprises shell, lid, micro machine, shifting fork mechanism, untie-sell dish, flywheel body, collision block, torsion head, two-direction switch and starting switch; Described shell is a pistol-shaped, and two-direction switch and starting switch are arranged on its lever; Described micro machine is the 12V direct current generator, and its output shaft is a splined shaft; Described shifting fork mechanism is made up of stand frame, shift fork, extension spring, little axle and Weight plate, Weight plate is fixed on the connecting plate of shift fork, the other end of shift fork is the claw type plate, shift fork can rotate around little axle, stand frame and shift fork are assembled into parts by two little axles, an extension spring is respectively adorned at the two ends of little axle, and stand frame is fixedly mounted on the axle of flywheel body; Described untie-sell dish top is provided with two bearing pins; The spline housing that described flywheel body one end setting can cooperate with the micro machine output shaft, the hole that other end setting can cooperate with the torsion head; Described torsion head by ball bearing, bearing holder (housing, cover) and be installed in the lid in axle sleeve be connected with the flywheel body; Described collision block is connected with the flywheel body by bearing pin.

Air vent is offered in the corresponding micro machine of described shell position.

For adapting to the different situations of various tyres for passenger cars screws, also be equipped with four kinds of standard cartridges, its specification is 17#, 19#, 21# and 23#.

Operation principle of the present utility model is the huge inertia energy that utilizes the rotation of flywheel height speed to store, and instantaneous relase makes the torsion head produce a strong wallop square, thus loosening or fastening screw screw.

The output shaft of micro machine directly inserts in the spline housing of flywheel body, when electric power system connects the 12V direct current, pin starting switch, micro machine just runs up, and driving flywheel height speed rotation, when the flywheel body reaches certain rotating speed, under centrifugal action, make shifting fork mechanism stir the untie-sell dish to micro machine direction motion, at this moment collision block loses rest and deflects, and meshes with the torsion head, the huge inertia that the flywheel body stores can instantaneously pass to the torsion head by collision block, make the torsion head obtain a strong wallop square, promptly pull moment, thus loosening or fastening screw screw.

Electric wrench of the present utility model has the following advantages:

1, adopts the design principle of the accumulation of energy of flywheel body, instantaneous relase, can produce the bigger moment of pulling, make structure small and exquisite with little power of motor.

2, adopt the flywheel body overall structure that directly drives by micro machine, make the structure reason more rationally compact.

3, utilize the shifting fork mechanism of centrifugal force action, simple in structure, reliable in action.

4, for adapting to the difference of the various tire of car, be equipped with the standard cartridges of four kinds of different sizes, increased the scope of application of electric wrench.

5, utilize the power supply of car 12V dc battery jar, can use with car easily.

Below in conjunction with drawings and Examples, further specify the utility model.

Fig. 1 is the installation diagram of electric wrench;

Fig. 2 is the structure chart of flywheel body in the utility model;

Fig. 3 is the assembly drawing of shifting fork mechanism in the utility model;

Fig. 4 is the vertical view of Fig. 3.

Fig. 1 illustrates the structure of electric wrench of the present utility model, and with reference to Fig. 1, it mainly comprises: shell 1, lid 15, micro machine 2, shifting fork mechanism 4, untie-sell dish 5, flywheel body 6, collision block 8, torsion head 9, two-direction switch 16 and starting switch 17.Wherein shell 1 is a pistol-shaped, and two-direction switch 16 and starting switch 17 are arranged on its lever, are provided with power line 18 below, can be connected with the car storage battery.Micro machine 2 is a direct current 12V motor, and its output shaft is a splined shaft, can directly insert in the spline housing 61 of flywheel body 6.Torsion head 9 is by ball bearing 7,11, bearing holder (housing, cover) 12 and be installed in the axle sleeves 14 that cover in 15 and be connected with flywheel body 6, and collision block passes through bearing pin 10 and is connected with flywheel body 6.Two-direction switch 16 effects are to change micro machine 2 direction of rotation, with dismounting or fastening screw screw.

This electric wrench has two key components and parts, the one, flywheel body 6, two, shifting fork mechanism 4.

With reference to Fig. 2, flywheel body 6 is energy-accumulating elements, and the spline output shaft of micro machine 2 directly inserts in the spline housing 61 of flywheel body 6, just can rotate to store energy at a high speed by high-speed driving flywheel body 6, and 6 of micro machine 2 and flywheel bodies are provided with rolling bearing 3.

Referring to Fig. 3 and Fig. 4, shifting fork mechanism 4 is made up of stand frame 43, shift fork 42, extension spring 44, little axle 45 and Weight plate 41.Weight plate 1 usefulness riveted joint mode is fixed on the connecting plate of shift fork 42, and the right-hand member of shift fork 42 is claw type plates, and shift fork 42 can rotate around little axle 45.Stand frame 43 is assembled into parts with shift fork 42 by two little 45, and an extension spring 44 is respectively adorned at the two ends of little axle 45, and the hole of wearing little axle on the stand frame 43 is a slotted hole, allows little axle 45 to do moving radially of a small amount of in stand frame 43.Shifting fork mechanism 4 is critical components of realizing that flywheel body 6 and torsion head 9 mesh or throw off.Stand frame 43 in the shifting fork mechanism is fixedly mounted on the axle of flywheel body 6, when flywheel body 6 rotates at a high speed, shifting fork mechanism 4 is and then rotation synchronously also, and under action of centrifugal force, Weight plate 41 side direction are thrown away outward, and extension spring 44, and the pawl of shift fork 42 is just stirred untie-sell dish 5 and is moved to the left, two pins of the rest collision block 8 on the untie-sell dish 5 are dialled are taken off, collision block 8 deflections and with 9 engagements of torsion head, realized the engagement of flywheel body 6, dismantled or the holding screw operation with torsion head 9.When dismounting or holding screw operation, the rotating speed of flywheel body 6 descends suddenly, centrifugal action reduces, under the effect of spring force, shift fork 42 promotes untie-sell dish 5 again and returns to original position, and two pins on the untie-sell dish 5 get up collision block 8 rests again, and torsion head 9 is thrown off with flywheel body 6, flywheel body 6 begins again to run up, for following subjob is got ready.

For ease of heat radiation, air vent 20 can be offered in the position of corresponding micro machine 2 on the shell 1.

For enlarging the scope of application of electric wrench, the spy is equipped with four kinds of standard cartridges, and its specification is 17#, 19#, 21# and 23#.

For weight reduction be convenient to processing, shell 1 and lid 15 can adopt plastic material to make.

The basic mechanical design feature index:

1, electric wrench moment of torsion: 120Nm;

2, electric wrench weight: 1.75Kg;

3, appearance and size: 235 * 200 * 80mm.

Claims

1, a kind of electric wrench is characterized in that it comprises: shell (1), lid (15), micro machine (2), shifting fork mechanism (4), untie-sell dish (5), flywheel body (6), collision block (8), torsion head (9), two-direction switch (16) and starting switch (17); Described shell (1) is a pistol-shaped, and two-direction switch (16) and starting switch (17) are arranged on its lever; Described micro machine (2) is the 12V direct current generator, and its output shaft is a splined shaft; Described shifting fork mechanism (4) is made up of stand frame (43), shift fork (42), extension spring (44), little axle (45) and Weight plate (41), Weight plate (41) is fixed on the connecting plate of shift fork (42), the other end of shift fork (42) is the claw type plate, shift fork (42) can rotate around little axle (45), stand frame (43) is assembled into parts with shift fork (42) by two little axles (45), an extension spring (44) is respectively adorned at the two ends of little axle (45), and stand frame (43) is fixedly mounted on the axle of flywheel body; Described untie-sell dish (5) top is provided with two bearing pins; The spline housing (61) that described flywheel body (6) one end settings can cooperate with the micro machine output shaft, the hole that other end setting can cooperate with torsion head (9); Described torsion head (9) is connected with flywheel body (6) by ball bearing (7), (11), bearing holder (housing, cover) (12) and the axle sleeve (14) that is installed in the lid (15); Described collision block (8) is connected with flywheel body (6) by bearing pin (10).

2, electric wrench according to claim 1 is characterized in that the corresponding micro machine of described shell (1) (2) position offers air vent.

3, electric wrench according to claim 1 is characterized in that also comprising four kinds of standard cartridges, and its specification is 17#, 19#, 21# and 23#.

4, electric wrench according to claim 1 is characterized in that described shell (1) and lid (15) adopt plastic material to make.