CN215318501U

CN215318501U - A two-speed transmission power tool with dual purpose of electric wrench and electric drill

Info

Publication number: CN215318501U
Application number: CN202121753756.5U
Authority: CN
Inventors: 王国富
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-07-30
Filing date: 2021-07-30
Publication date: 2021-12-28
Anticipated expiration: 2031-07-30

Abstract

An electric wrench and electric drill dual-purpose two-speed transmission power tool, comprising a striking planetary shaft, a striking block slidingly sleeved on the lower end of the striking planetary shaft, and an elastic component arranged between the striking block and the striking planetary shaft, and the upper end of the striking planetary shaft is installed There is a two-speed transmission mechanism for driving the striking planetary shaft to rotate. The lower end of the striking planetary shaft is connected with an output square taper shaft that can move along the axial direction of the striking planetary shaft. The lower end of the striking planetary shaft is provided with a limit circlip, and the striking block is at the limit The striking planet shaft between the circlip and the output square taper shaft slides up, the upper end of the output square taper shaft is provided with a block, the lower end of the striking block is provided with a lock block corresponding to the block, and the lower end of the output square taper shaft is provided with an interface chuck. The utility model can realize the functions of an electric wrench and an electric drill at the same time.

Description

Dual-purpose double-speed transmission electric tool for electric wrench and electric drill

Technical Field

The utility model relates to the technical field of electric tools, in particular to a dual-purpose double-speed transmission electric tool for an electric wrench and an electric drill.

Background

The electric wrench is a wrench powered by a power supply or a battery, is a common electric tool for screwing or disassembling a bolt, and has the main working principle that a driving impact block in a mechanism is used for continuously knocking a driven impact block at the front part, so that a large torque is generated, and screws or nuts which are difficult to knock can be knocked down or loosened.

The existing electric wrench is usually only provided with one speed gear, so that the screw and the nut are easily and directly damaged when the small screw and the small nut are screwed down or disassembled, and extra tools such as an electric drill are required to be equipped in some scenes with extra working requirements such as drilling due to single function, so that the purchase cost is increased, and the tools are too much carried and are inconvenient. Although current electric spanner can install the interface chuck that takes the square hole to connect the pole and be used for drilling, square hole and electric spanner's cubic output head can't accomplish the zero clearance and connect to the concentricity that leads to the interface chuck can't guarantee, in addition, when electric spanner does not strike, the moment of torsion of output is very little, makes the drilling resistance slightly just begin to strike the torsion a bit slightly, so that drilling efficiency is low, and because the during operation drill bit swing is great, damages the drill bit easily when driling hard article, so not be suitable for.

SUMMERY OF THE UTILITY MODEL

Aiming at the defects in the prior art, the utility model provides the dual-purpose double-speed transmission electric tool for the electric wrench and the electric drill, which can realize the functions of the electric wrench and the electric drill simultaneously, has two purposes, can realize double-speed transmission, and has stable structure and strong functionality.

In order to achieve the purpose, the utility model adopts the following technical scheme:

the dual-purpose double-speed transmission electric tool comprises a striking planetary shaft, a striking block and an elastic component, wherein the striking block is arranged at the lower end of the striking planetary shaft in a sliding mode, the elastic component is arranged between the striking block and the striking planetary shaft, a double-speed transmission mechanism used for driving the striking planetary shaft to rotate is arranged at the upper end of the striking planetary shaft, the lower end of the striking planetary shaft is connected with an output square taper shaft capable of moving along the axial direction of the striking planetary shaft, a limiting clamp spring is arranged at the lower end of the striking planetary shaft, the striking block slides on the striking planetary shaft between the limiting clamp spring and the output square taper shaft, a stop block is arranged at the upper end of the output square taper shaft, a locking block corresponding to the stop block is arranged at the lower end of the striking block, and an interface chuck is arranged at the lower end of the output square taper shaft. The axial distance between the output square taper shaft and the striking planet shaft is adjusted, so that the striking block is clamped under the limit of the limit clamp spring, the lock block and the stop block are kept matched without being separated, the striking block can only drive the output square taper shaft to rotate, indirect striking cannot be carried out, and the function of the electric wrench is converted into the function of an electric drill; the double-speed transmission of the electric tool is realized through the double-speed transmission mechanism; the rotation concentricity of the interface chuck and the output square taper shaft during the operation of the electric drill and the torque transmission during the operation are ensured through the interface chuck.

Furthermore, the double-speed transmission mechanism comprises a first gear ring, a second gear ring, a gear shifting clamping ring and a plurality of duplex planetary gears, the duplex planetary gears are installed at the upper end of the striking planetary shaft and can rotate relative to the striking planetary shaft, the first gear ring, the second gear ring and the gear shifting clamping ring are all sleeved on the periphery of the upper end of the striking planetary shaft, inner teeth of the first gear ring and inner teeth of the second gear ring are respectively meshed with two gears in the duplex planetary gears, clamping grooves are formed in the outer side wall of the first gear ring and the outer side wall of the second gear ring, the inner side of the gear shifting clamping ring is inserted into the clamping grooves, and the gear shifting clamping ring can slide back and forth between the clamping grooves in the first gear ring and the clamping grooves in the second gear ring.

Furthermore, motor shaft teeth for driving the duplex planet gears to rotate are inserted into the upper ends of the striking planet shafts.

Furthermore, the output square taper shaft comprises a shaft lever, a conical shaft head and a square joint, the upper end of the shaft lever is connected with the lower end of the striking planet shaft, and the lower end of the shaft lever is connected with an interface chuck sequentially through the conical shaft head and the square joint.

Furthermore, a counter bore is formed in the end face of the upper end of the shaft rod, the lower end of the striking planet shaft is inserted into the counter bore, a containing groove is formed in the end face of the lower end of the striking planet shaft, a return steel ball is arranged in the containing groove, a return spring is arranged in the counter bore, one end of the return spring is fixed to the bottom of the counter bore, and the other end of the return spring is abutted to the return steel ball.

Furthermore, a taper hole interface is arranged on the interface chuck, the interface chuck is connected with the conical shaft head in an inserting mode through the taper hole interface, and a V-shaped groove matched with the edge angle of the side wall of the square joint is formed in the side wall of the taper hole interface.

Compared with the prior art, the utility model has the following beneficial effects:

1. according to the utility model, through the arrangement of the striking planetary shaft, the striking block, the elastic component, the two-speed transmission mechanism, the output square taper shaft, the limit clamp spring and the interface chuck, the two-speed transmission mechanism is utilized to drive the striking planetary shaft to rotate, the striking planetary shaft drives the striking block to rotate in the rotating process, meanwhile, the striking block is driven to slide back and forth along the striking planetary shaft under the cooperation of the elastic component and the limit clamp spring, and the striking block intermittently impacts the output square taper shaft in the back and forth sliding process through the cooperation of the locking block and the stop block. After the sleeve is arranged on the output square taper shaft, the impact of the striking block on the output square shaft can realize the function of the electric wrench; after the interface chuck is installed on the output square taper shaft, the axial distance between the output square taper shaft and the striking planet shaft is adjusted, so that the striking block is clamped under the limit of the limit clamp spring, the locking block and the stop block are kept matched without separation, the striking block can only drive the output square taper shaft to rotate, indirect striking cannot be performed, the electric drill function is realized, and finally the electric drill function and the electric wrench function are combined, so that one machine with dual purposes is realized, and the functionality is improved.

2. According to the double-speed transmission mechanism, the gear shifting retainer ring is utilized to respectively brake the first gear ring and the second gear ring in the rotation process of the duplex planetary gear, so that the duplex planetary gear drives the striking planetary shaft to rotate at different rotating speeds, and then double-speed transmission is realized.

3. When the electric drill realizes the function of an electric drill, the interface chuck is spliced with the conical shaft head through the conical hole interface, and under the matching of the square joint and the V-shaped groove, the rotation concentricity of the interface chuck and the output square conical shaft and the torque transmission during working are ensured.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is an enlarged view of the structure at A in FIG. 1;

fig. 3 is a schematic structural view of the interface chuck of the present invention.

Reference numerals: 1. striking the planet shaft; 2. outputting a square taper shaft; 3. a striking block; 4. a stopper; 5. a locking block; 6. a duplex planetary gear; 7. a limiting clamp spring; 8. a first gear ring gear; 9. a second gear ring gear; 10. a shifting collar; 11. a card slot; 12. an outer ring wall; 13. an inner ring wall; 14. a ring groove; 15. a pressure bearing; 16. a pressure spring; 17. a V-shaped groove; 18. a ball bearing; 19. motor shaft teeth; 20. a counter bore; 21. accommodating grooves; 22. returning the steel balls; 23. a return spring; 24. an interface chuck; 25. a shaft lever; 26. a conical shaft head; 27. a square joint; 28. a taper hole interface; 29. and a V-shaped groove.

Detailed Description

The technical scheme of the utility model is further explained by combining the attached drawings.

As shown in fig. 1, the dual-purpose double-speed transmission electric tool for the electric wrench and the electric drill comprises a striking planet shaft 1, a striking block 3 which is sleeved at the lower end of the striking planet shaft 1 in a sliding manner, and an elastic component which is arranged between the striking block 3 and the striking planet shaft 1.

Specifically, the striking block 3 with the structure shown in fig. 2 is adopted in the scheme, the upper end of the striking block comprises an outer ring wall 12 and an inner ring wall 13, the inner ring wall 13 is sleeved on the striking planet shaft 1 in a sliding mode, an annular groove 14 is formed between the outer ring wall 12 and the inner ring wall 13, a V-shaped groove 17 is formed in the side wall of the striking planet shaft 1, an inverted V-shaped groove corresponding to the V-shaped groove 17 is formed in the inner side of the inner ring wall 13, and a ball 18 is arranged between the V-shaped groove 17 and the inverted V-shaped groove. Through the arrangement of the V-shaped groove 17, the inverted V-shaped groove and the balls 18, the striking block 3 can be driven to rotate along with the striking planetary shaft 1 when the striking planetary shaft 1 rotates, and meanwhile, the striking block 3 is driven to slide along the axial direction of the striking planetary shaft 1.

In addition, the scheme adopts the elastic component with the structure shown in fig. 2, and the elastic component comprises a pressure bearing 15 and a pressure spring 16, wherein the pressure bearing 15 is arranged at the bottom of the annular groove 14, the upper end of the pressure spring 16 is propped against the upper end of the striking planet shaft 1, and the lower end of the pressure spring 16 is propped against the pressure bearing 15. Therefore, when the striking planet shaft 1 rotates, the striking block 3 can be driven to slide back and forth under the matching of the V-shaped groove 17, the inverted V-shaped groove, the ball 18 and the elastic component, the pressure spring 16 is compressed when the striking block 3 slides upwards, and the pressure spring 16 is extended when the striking block 3 slides downwards.

This scheme has adopted the output square taper shaft 2 to carry out the torsional output when the electric spanner operation, its structure includes axostylus axostyle 25, as shown in fig. 1, counter bore 20 has been seted up to axostylus axostyle 24 upper end terminal surface, be used for striking 1 lower extreme of planet axle and make output square taper shaft 2 and strike planet axle 1 after inserting and realize pegging graft, and strike 1 lower extreme terminal surface of planet axle and seted up holding tank 21, holding tank 21 internal fixation has return steel ball 22, be equipped with return spring 23 in the counter bore 20, this return spring 23 one end is fixed in the counter bore 20 bottom, the other end and return steel ball 22 butt. In addition, axostylus axostyle 24 upper end is equipped with dog 4, strikes 3 lower extremes of piece and is equipped with the locking piece 5 that corresponds with dog 4, and through the cooperation of locking piece 5 and dog 4, strike piece 3 and then strike output square taper shaft 2 intermittently at the gliding in-process that makes a round trip, and then realize the spanner function. Through the arrangement of the return steel balls 22 and the return springs 23, the output square taper shaft 2 can be positioned during wrench operation.

On the basis of realizing the electric spanner function, this scheme is fixed with spacing jump ring 7 on striking planet axle 1, makes to strike piece 3 and slides on striking planet axle 1 between spacing jump ring 7 and output square taper axle 2. In addition, through the arrangement of the return steel balls 22 and the return springs 23, the output square taper shaft 2 can move axially along the striking planet shaft 1, so that the axial distance between the output square taper shaft 2 and the striking planet shaft 1 can be adjusted. When the axial distance between the output square taper shaft 2 and the striking planet shaft 1 is reduced, the striking block 3 slides upwards to the limiting clamp spring 7, and the upper end of the inner ring wall 13 of the striking block 3 abuts against the limiting clamp spring 7, the striking planet shaft 1 is fixed, so that under the limiting condition of the limiting clamp spring 7, the locking block 5 and the stop block 4 are kept matched without being separated, the striking block 3 only can drive the output square taper shaft 2 to rotate, and the output square taper shaft 2 cannot be indirectly struck, and therefore, the electric drill function can be realized by installing the electric drill on the output square taper shaft 2. Finally, the electric wrench and the electric drill are combined, so that the electric tool disclosed by the utility model has two purposes, and the functionality and the practicability are further improved.

As shown in fig. 1 and 3, in the present scheme, an interface chuck 24 is adopted to be connected with an output square taper shaft 2, and then a drill chuck is installed through the interface chuck 24, in order to ensure the stability of the electric drill during operation, a taper shaft head 26 and a square joint 27 are sequentially and integrally formed at the lower end of a shaft rod 25 of the output square taper shaft 2, a taper hole interface 28 is formed on the interface chuck 24, the taper shaft head 26 is inserted into the interface chuck 24 through the taper hole interface 28, and then the interface chuck 24 is installed on the output square taper shaft 2, and meanwhile, through the matching of the taper shaft head 26 and the taper hole interface 28, the rotation concentricity of the interface chuck 24 and the output square taper shaft 2 is ensured. In addition, the side wall of the taper hole interface 28 is provided with a V-shaped groove 29 matched with the edge angle of the side wall of the square joint 27, so that when the conical shaft head 26 is inserted into the interface chuck 24, the square joint 27 can be simultaneously inserted into the taper hole interface 28, and simultaneously, under the matching of the square conical head 16 and the taper hole interface 28, the torque transmission during working is ensured.

The existing electric wrenches mostly only have one rotating speed, so that the torque during working can only be suitable for screwing or disassembling partial screws and nuts, and particularly for some smaller screws and nuts, the screws and nuts are easy to damage due to direct use. In order to solve the problem, the double-speed transmission mechanism for driving the striking planet shaft 1 to rotate is arranged at the upper end of the striking planet shaft 1, so that double-speed transmission is realized through adjustment, the double-speed transmission mechanism can be suitable for screwing or disassembling more screws and nuts with different sizes, and the practicability is further improved.

Specifically, as shown in fig. 1, the double-speed transmission mechanism includes a first-gear ring (8), a second-gear ring (9), a shifting collar (10) and a plurality of duplex planetary gears (6), wherein the duplex planetary gears (6) are mounted at the upper end of the striking planetary shaft (1) and can rotate relative to the striking planetary shaft (1), the first-gear ring (8), the second-gear ring (9) and the shifting collar (10) are all sleeved on the periphery of the upper end of the striking planetary shaft (1), and inner teeth of the first-gear ring (8) and inner teeth of the second-gear ring (9) are respectively meshed with two gears in the duplex planetary gears (6). The outer side wall of the first gear ring (8) and the outer side wall of the second gear ring (9) are provided with clamping grooves (11), the inner side of the gear shifting clamping ring (10) is inserted into the clamping grooves (11), and the gear shifting clamping ring (10) can slide back and forth between the clamping grooves (11) on the first gear ring (8) and the clamping grooves (11) on the second gear ring (9). When the double-speed transmission device works, the motor shaft teeth 19 on the motor are inserted into the upper end of the striking planetary shaft 1 to drive the double-connection planetary gear 6 to rotate, the gear shifting clamping ring 10 is slid, the inner side of the gear shifting clamping ring 10 is clamped into a clamping groove of the first-gear ring 8 or the second-gear ring 9, then the gear shifting clamping ring 10 is fixed to brake the first-gear ring 8 or the second-gear ring 9, two gears in the double-connection planetary gear 6 can rotate respectively, even if the double-connection planetary gear 6 drives the striking planetary shaft 1 to rotate at different rotating speeds, and double-speed transmission is finally achieved.

Finally, the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all of them should be covered in the claims of the present invention.

Claims

1. An electric wrench and electric drill dual-purpose two-speed drive power tool, comprising a striking planetary shaft (1), a striking block (3) slidingly sleeved on the lower end of the striking planetary shaft (1), and a striking block (3) and a striking block (3) and a striking block (3). The elastic component between the striking planetary shafts (1) is characterized in that: the upper end of the striking planetary shaft (1) is provided with a two-speed transmission mechanism for driving the striking planetary shaft (1) to rotate, and the lower end of the striking planetary shaft (1) is connected with a movable The output square taper shaft (2) moves along the axial direction of the striking planetary shaft (1), the lower end of the striking planetary shaft (1) is provided with a limit circlip (7), and the striking block (3) is on the limit circlip (7) The striking planetary shaft (1) between the output square taper shaft (2) slides up, the upper end of the output square taper shaft (2) is provided with a stopper (4), and the lower end of the striking block (3) is provided with a stopper (4) The corresponding lock block (5) has an interface chuck (24) at the lower end of the output square taper shaft (2).

2. The dual-speed transmission power tool for electric wrench and electric drill according to claim 1, characterized in that: the dual-speed transmission mechanism comprises a first gear ring gear (8), a second gear ring gear (9), a shift collar (10) and a plurality of double planetary gears (6), the double planetary gears (6) are mounted on the upper end of the striking planetary shaft (1) and can rotate relative to the striking planetary shaft (1), the first gear ring gear (8), The second gear ring gear (9) and the shift collar (10) are both sleeved on the outer periphery of the upper end of the striking planetary shaft (1), and the inner teeth of the first gear ring gear (8) and the second gear ring gear (9) are respectively Meshing with two gears in the double planetary gear (6), the outer side wall of the first-speed ring gear (8) and the outer side wall of the second-speed ring gear (9) are provided with clamping grooves (11), and the shifting clamping ring ( 10) Insert the inner side into the card groove (11), and the shift card ring (10) can fit the card groove (11) on the first gear ring gear (8) and the card groove (11) on the second gear ring gear (9) Swipe back and forth between.

3. The dual-speed transmission power tool for electric wrench and electric drill according to claim 2, characterized in that: the upper end of the striking planetary shaft (1) is inserted with a motor shaft tooth (19) that drives the rotation of the double planetary gear (6). .

4. The dual-speed transmission power tool for electric wrench and electric drill according to claim 1, characterized in that: the output square taper shaft (2) comprises a shaft rod (25), a conical shaft head (26) and a square joint ( 27), the upper end of the shaft rod (25) is connected with the lower end of the striking planetary shaft (1), and the lower end of the shaft rod (25) is sequentially connected with the interface chuck (24) through the conical shaft head (26) and the square joint (27).

5. The dual-speed transmission power tool for electric wrench and electric drill according to claim 4, characterized in that: the upper end face of the shaft rod (25) is provided with a countersunk hole (20), and the lower end of the striking planetary shaft (1) is inserted into the countersunk hole (20). 20), a receiving groove (21) is formed on the lower end face of the striking planetary shaft (1), a return steel ball (22) is arranged in the receiving groove (21), and a return spring (23) is arranged in the counterbore (20) to return One end of the spring (23) is fixed on the bottom of the counterbore (20), and the other end of the return spring (23) is in contact with the return steel ball (22).

6. The dual-speed transmission power tool for electric wrench and electric drill according to claim 4, characterized in that: the interface chuck (24) is provided with a tapered hole interface (28), and the interface chuck (24) passes through the tapered hole The interface (28) is inserted into the conical shaft head (26), and the side wall of the conical hole interface (28) is provided with a V-shaped groove (29) adapted to the corners of the side wall of the square joint (27).