CN2155293Y - Screw handling power tools - Google Patents

Abstract

An electric tool for assembling and disassembling screw is composed of casing, speed-reducing gear mechanism, energy-accumulating moving mechanism, control switch and foldable handle. The drive motor and the gear box with two-stage planetary gear speed reducing mechanism are mounted in the shell body, and the energy-storing movement mechanism is formed from movement shaft lever with inverted V-shaped groove, clamping ring matched with it and having V-shaped recessed portion, positioning steel ball, impact sleeve, circular cushion block, coil spring and drive shaft lever, etc. and is mounted in the horn-shaped movement mechanism seat cover and connected with shell body into one body, and can be used for controlling forward and backward rotation of motor so as to easily mounting or dismounting screw.

Description

The utility model belongs to an electric tool for loading and unloading screws. The screws mentioned here mainly refer to bolts and nuts thereof, and also include screws and nuts thereof.

To install or remove the screws that fix the tires, generally use pneumatic tools, which generate discontinuous continuous impact torque, and can quickly load and unload the screws that fix the tires. This kind of pneumatic tool is powered by compressed air. If the required working torque is greater, the unit square pressure (pressure) of the compressed air will be higher. It is very easy to equip an air compressor in a general garage, and there are many other uses for compressed air. However, for a car in general operation, an air compressor cannot be configured as an on-board tool, but is only used to drive an air tool. However, it is common for car drivers to change tires, and it is quite laborious due to lack of appropriate tools, especially for female drivers with less strength, it is very difficult to use a manual wrench to complete the loading and unloading of car tire screws.

The applicant has applied for the No. 75207418, No. 75207418A01, and No. 75207418A02 patents in Taiwan, and has now been awarded the patent certificate No. 34467 (and addition 1 and addition 2). The main feature of this patent is to utilize a kind of clutch device, after the rotating speed of drive motor reaches rated rotating speed, drive an action element to rotate, make it produce a huge impact force, to unscrew or tighten screw. Yet this patent structure is complicated, still needs to improve.

The purpose of this utility model is to provide a screw loading and unloading power tool, which uses a motor to cooperate with two sets of reduction gears to compress a strong spring to generate high torque, which acts on a moving shaft and an impact sleeve to make it hit the driving shaft, so that Remove or tighten the screws from their fastening positions.

The electric tool for screw loading and unloading provided by the utility model comprises a casing, a driving motor, a reduction gear mechanism, an energy storage movement mechanism, a control switch and a handle. The drive motor and the gearbox equipped with two sets of reduction gear mechanisms are installed in the housing, and the storage system consisting of a moving shaft, a clamping ring, a positioning steel ball, an impact sleeve, a circular spacer, a coil spring, and a driving shaft, etc. The movable mechanism is contained in the trumpet-shaped moving mechanism seat cover and is connected and assembled with the aforementioned housing.

The utility model screw loading and unloading electric tool, its components and structure specifically include a housing, a driving motor is installed at the rear of the housing, the output shaft of the motor protrudes from the opening of the housing, and the end of the output shaft There is a small gear, and there is a gear box on the inner edge of the opening part of the housing. The gear box has a center hole, and a shaft sleeve is arranged in the center hole to prevent wear. There are several sets of reduction gear mechanisms in the gear box; a first reduction gear mechanism, It includes a gear carrier, on which a first group of several planetary gears is installed, and the first group of planetary gears respectively meshes with the first gear ring in the gearbox, in addition, the pinion at the end of the output shaft of the aforementioned motor is also Extending into the middle of the first set of planetary gears and meshing with it, the first reduction gear mechanism also includes an output shaft with a pinion at the end of the output shaft; a second reduction gear mechanism includes a disc-shaped gear carrier, There is a shaft hole in the center of the gear carrier, and a pair of symmetrically arranged notches are arranged on its outer edge, and the second group of planetary gears are installed in the notches, and the second group of planetary gears meshes with the pinion at the end of the output shaft of the first reduction gear mechanism. ; A second ring gear is provided in the second inner ring wall of the aforementioned gear box, and the outside of the second set of planetary gears meshes with the second ring gear; a trumpet-shaped movement mechanism seat cover, which is relatively There is a mounting flange with a hole at the large opening end. Use screws to pass through the flange and the mounting ring of the gearbox to fix them on the opening part of the aforementioned housing. The smaller opening section of the movement mechanism seat cover has a shaft hole. An axle sleeve is arranged in this shaft hole, and the output shaft of the aforementioned first reduction gear mechanism and the pinion at its end extend into the movement mechanism; The disc fixes the moving shaft on the disc-shaped gear frame of the aforementioned second reduction gear mechanism. The front surface of the moving shaft has two symmetrically arranged inverted V-shaped grooves. Set a round spacer, a coil spring, and a washer: an impact sleeve, in which the said washer and coil spring are contained, and its front end includes two forward-protruding impact blocks, in which The cavity is a stepped hole. The inner diameter of the front section of the stepped hole is larger than that of the rear section. The front section hole is called the inner ring part. On the inner wall of the inner ring part, there are several straight grooves parallel to the axis; In the inner ring portion of the impact sleeve, there are two symmetrically arranged V-shaped depressions on the inner wall of the clamping ring. The opening of the depressions is located on the front end of the clamping ring. There are several ridges parallel to the axis on the outer wall, these ridges just fit into the straight grooves on the inner ring part of the impact sleeve, and the two inverted V-shaped grooves of the aforementioned motion shaft are matched with the locking ring. The two V-shaped recesses cooperate with each other; two positioning steel balls are embedded between the two inverted V-shaped grooves of the aforementioned motion shaft and the two V-shaped recesses of the aforementioned clamping ring, so that the clamping ring is tightly Set in the impact sleeve, and restrict the impact sleeve so that it cannot escape from the movement shaft; a drive shaft, the rear part of which is a disc base, and the bottom of the disc base has two symmetrically arranged slaves They can accept the impact torque transmitted from the impact sleeve through the impact block. A washer is set on the drive shaft to prevent wear and tear. Extend out from the center, use it to engage the sleeve, put on the screw, and achieve the purpose of locking or loosening the screw.

The structural features of the utility model, the mode of motion and its advantages will be further described in detail in conjunction with the embodiments shown in the accompanying drawings, wherein

Fig. 1 is the cross-sectional view after the assembly of the electric tool for screw loading and unloading of the present utility model;

Fig. 2 is a three-dimensional exploded view of the main components of the utility model screw loading and unloading electric tool;

Fig. 3, Fig. 4 and Fig. 5 are schematic diagrams of relative movement among the moving shaft, impact sleeve and driving shaft in the electric tool of the present invention;

Fig. 6 is a schematic diagram of the movement of the pinion, the planetary gear and the ring gear.

An embodiment of the utility model screw loading and unloading power tool is described below in conjunction with the accompanying drawings. As shown in Figures 1 and 2, the electric tool 1 of the present utility model includes a housing 10, and a drive motor 12 is installed at the rear of the housing 10, and the output shaft 13 of the motor 12 protrudes from the opening of the housing 10. There is a pinion gear 131 at the end of the output shaft 13, and a gear box 30 is provided on the inner edge of the opening 101 of the housing 10, in which a set of reduction gear mechanisms are accommodated. There is a shaft sleeve 313 in the central hole 312 of the gear box 30: a first A reduction gear mechanism 20, which includes a gear carrier 21, and a first set of planetary gears 22, the first set of planetary gears 22 are respectively meshed with the first gear ring 201 in the gearbox 30, in addition, the output shaft 13 end of the motor 12 The pinion 131 of the part also extends between the first set of planetary gears 22 and meshes with it, the first reduction gear mechanism 20 further includes an output shaft 23, and includes a pinion 231 at the end of the output shaft; A second reduction gear mechanism 40, which includes a disc-shaped gear frame 42, a shaft hole 421 is arranged in the center of the gear frame 42, a pair of symmetrically arranged gaps 43 are arranged on the outer edge of the gear frame, and the second gear frame is installed in the gap 43. A group of planetary gears 44, the second group of planetary gears 44 meshes with the pinion 231 at the end of the output shaft 23 of the first reduction gear mechanism 20, and the second inner ring wall 311 of the said gearbox 30 is equipped with a second Ring gear 412, said second set of planetary gears 44 are in engagement with the second ring gear 412: a kinematic mechanism seat cover 80, which is trumpet-shaped, and its larger open end is a mounting flange with holes 801, pass through the mounting ring 31 of the flange 801 and the aforementioned gear box 30 with screws, and fix them on the opening 101 of the aforementioned housing 10, the smaller opening section of the moving seat cover 80 has a shaft hole 82, the shaft An axle sleeve 821 is housed in the hole 82; A motion shaft 50, its rear end is a disc 51, with this disc 51 the motion shaft 50 is fixed on the disc gear frame 42 of the aforementioned second reduction gear mechanism 40 On the surface of the front section of the movement shaft 50, there are two symmetrically arranged V-shaped grooves 52. The movement shaft 50 is also fitted with a round pad 53, a coil spring 54, and a Washer 55: an impact sleeve 60, said washer 55 and coil spring 54 are installed in its inner cavity, and its front end includes two impact blocks 61 protruding forward, and its inner cavity is a stepped hole. The internal diameter of the front section is larger than that of the rear section, and the front section hole is called the inner ring part 62. On the inner wall of the inner ring part 62, there are several straight grooves 63 parallel to the axis; In the inner ring portion 62 of the sleeve 60 , on the inner wall 71 of the clamping ring 70 , there are two symmetrically arranged V-shaped recesses 72 , the openings of the recesses 72 are located on the front end surface of the clamping ring 70 . The outer wall of the clamping ring 70 has several straight protrusions 73 parallel to the axis, and these straight protrusions 73 just fit into the straight grooves 63 in the inner ring portion 62 of the impact sleeve 60, while the movement shaft 50 of the aforementioned The two inverted V-shaped grooves 52 cooperate with the two V-shaped recesses 72 on the clamping ring 70: two positioning steel balls 521 are embedded in the two inverted V-shaped grooves 52 and Between the two V-shaped recesses 72 of the aforementioned clamping ring 70, the clamping ring 70 is tightly fitted in the impact sleeve 60, and the impact sleeve 60 is restricted so that it cannot be detached from the moving shaft 50; There is a driving shaft 90 with a disc base 91 at the bottom, and there are two symmetrically arranged driven blocks 92 at the bottom of the disc base, which are used to receive the impact torque transmitted by the impact block 61 from the impact sleeve 60, the drive A washer 93 is also set on the shaft rod 90. The output shaft at the front end of the said driving shaft rod 90 is stretched out from the shaft hole 82 of the kinematic mechanism seat cover 80, and then a sleeve is joined, and the sleeve is put on the screw. , to achieve the purpose of locking or loosening the screw.

In addition, this tool controls the start and stop of the drive motor 12, which is realized by operating the switch 100 located at the bottom of the housing 10, and the tool handle 110 associated with this part adopts a foldable type, that is, the handle 110 is pulled apart during use to make it It is kept perpendicular to the main body, and the handle 110 is folded into a position parallel to the main body during storage to reduce the volume.

Mechanism movement and working principle of the present utility model can be explained with Fig. 3-Fig. 5. After the impact sleeve 60 fits the coiled spring 54 on the movement shaft 50, the spring 54 is first compressed to a certain degree, and then the two positioning steel balls 521 are respectively placed on the two inverted Vs of the movement shaft 50. Between the V-shaped groove 52 and the two V-shaped recesses 72 on the clamping ring 70, the steel ball 521 is restricted by the inverted V-shaped groove 52, so that the clamping ring 70 and the impact sleeve 60 cannot be disengaged. FIG. 3 shows the movement relationship between these components, where A represents the trajectory of the V-shaped recess 72 , B represents the trajectory of the inverted V-shaped groove 52 , and C represents the steel ball 521 . When the movement shaft 50 rotates clockwise and the initial screw is not hindered, the impact sleeve 60 rotates together with the movement shaft 50 and drives the drive shaft 90 to rotate clockwise together by virtue of the connection of the steel ball 521. After the screw is tightened to a certain degree of tightness, the resistance increases thereupon, and when the screw stops rotating, the driving shaft 90 also stops rotating thereupon, and the impact sleeve 60 is also blocked by the driving shaft 90, and then stop the rotation (cooperate with the impact block 61 and the driven block 92 between the two), at this time the motion shaft 50 still continues to rotate with high torque and low speed, and the steel ball 521 located in the groove 52 will The clamping ring 70 is pulled downward together with the impact sleeve 60. During this process, the spring 54 is compressed to accumulate a certain amount of elastic potential energy. As mentioned above, the impact sleeve 60 is driven by the bottom of the drive shaft 90. Block body 92 is blocked and cannot rotate (as shown in Figure 3-2), and when the impact block body 61 of the impact sleeve 60 breaks away from the block of driven block body 92 (as shown in Figure 4-2), the impact sleeve 60 due to Under the action of the elastic potential energy released by the spring 54, it bounces up quickly, and at the same time, due to the traction of the inverted V-shaped groove 52, the impact sleeve 60 produces a rightward rotation action, and the impact sleeve 60 The movement of the moving shaft 50 matched with 60 generates torsion force at the same time, and the torsion force and the potential energy released by the spring 54 are synthesized into an impact torsion force, and the impact torsion force strongly hits the driven block 92 of the drive shaft 90, thereby driving the The shaft 90 rotates, and the screw sleeve is rotated to drive the screw, so that the screw is further tightened.

The above is the movement principle of the utility model tool when the motor 12 rotates clockwise, that is, when the screw is tightened by right-hand rotation. The cooperating actions related to each other are carried out in the completely opposite direction, and finally the screws are loosened, so I won't repeat them here.

In short, the user can easily complete the installation or removal of screws by operating the electric motor of the electric tool to rotate clockwise or counterclockwise according to actual needs. The foldable handle 110 can be conveniently opened when using the tool and folded when storing.

To sum up, it is only a preferred embodiment of the utility model, and all equivalent changes made according to the concept of the present invention shall fall within the scope of claims of the utility model patent application.

Claims (1)

1. A screw loading and unloading power tool, which consists of a housing, a drive motor, a reduction gear mechanism, an energy storage movement mechanism, a control switch and a handle, and is characterized in that: A housing, the rear part of which is fixed with a drive motor, the output shaft of the motor protrudes from the opening part of the front part of the housing, and the end of the output shaft has a pinion, and the inner edge of the opening part of the housing has a gear box , the gear box is equipped with an array of reduction gear mechanisms, the gear box has a central hole, and there is a bushing in the central hole; A first reduction gear mechanism, including a gear frame, the first group of planetary gears mounted on the gear frame meshes with the first gear ring in the said gear box, the pinion at the end of the output shaft of the aforementioned motor also extends into the middle of the first set of planetary gears and engages with them, the first reduction gear mechanism also includes an output shaft, the end of the output shaft also has a pinion; A second reduction gear mechanism, which includes a disc-shaped gear carrier, with a shaft hole in the center of the gear carrier, and a pair of symmetrically arranged notches on the outer edge, the second group of planetary gears are installed in the notches, and the second A set of planetary gears meshes with the pinion at the end of the output shaft of the first reduction gear mechanism, and a second ring gear is provided in the second inner ring wall of the aforementioned gear box. The outside of the second set of planetary gears is in contact with the first Second tooth ring meshing; A trumpet-shaped motion mechanism seat cover, the larger opening end of which is a mounting flange with holes, and screws are used to pass through the flange and the mounting ring of the gear box to fix them to the opening of the aforementioned housing. The smaller opening section of the seat cover of the moving mechanism has a shaft hole, the shaft hole is equipped with a shaft sleeve, and the output shaft of the first reduction gear mechanism and the pinion at the end thereof extend into the moving mechanism; A movement shaft, the rear end of which is a disc, the movement shaft is fixed on the disc-type gear frame of the aforementioned second reduction gear mechanism with the disc, and the front section surface of the movement shaft is provided with two symmetrical An inverted V-shaped groove is provided, and a round washer, a coil spring, and a washer are also set on the movement shaft; An impact sleeve, the aforementioned washer and coil spring are installed in its inner cavity, and its front end includes two impact blocks protruding forward. The inner cavity is a stepped hole. The hole in the front section is the inner ring part, and several straight grooves parallel to the axis are opened on the inner wall of the inner ring part; A clamping ring, which is set in the inner ring part of the impact sleeve, on the inner wall of the clamping ring, there are two symmetrically arranged V-shaped depressions, the opening of the depressions is located at the On the front end face, there are several straight convex lines parallel to the axis on the outer wall of the clamping ring. The V-shaped groove cooperates with the two V-shaped recesses on the clamping ring; Two positioning steel balls are embedded between the two inverted V-shaped grooves on the aforementioned motion shaft and the two V-shaped recesses of the aforementioned locking ring; A drive shaft, the rear part of which is a disc base, the bottom of the disc base has two symmetrically arranged driven blocks, a washer is set on the drive shaft, and the output shaft at the front end of the drive shaft is formed by Stretch out in the axle hole of aforementioned kinematic mechanism seat cover, engage the sleeve that entangles screw with it.

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