automatic transmission

Abstract

The utility model discloses an automatic gearbox, including first gear box shell and setting in the second gear box shell of first gear box shell outside, first gear box shell inside is provided with drive mechanism, and drive mechanism transmission has the output shaft that can with the tool configuration assembly, and the output shaft is located first gear box shell one end at, first gear box shell's other end sets up motor connection cover, and motor connection cover's one side is provided with the first motor of drive drive mechanism and take output shaft and rotate, second gear box shell inside is provided with the speed regulation mechanism of drive mechanism speed regulation, and second gear box's one end is provided with the second motor of drive speed regulation mechanism and run, and second motor sets up with its fixed on second gear box and together with second gear box fixed on first gear box shell.

Description

Technical Field

[0001] This utility model relates to the field of power tools and cleaning tools, and in particular to automatic transmissions. Background Technology

[0002] In existing technologies, traditional power tools and cleaning tools generally use a fixed transmission ratio design, which cannot automatically match the motor speed and the output torque of the output shaft according to the actual use scenario. Alternatively, a mechanical manual adjustment mechanism can be set to adjust the transmission ratio, but mechanical manual adjustment has a response lag and is inconvenient to operate. Therefore, an automatic transmission is proposed. Utility Model Content

[0003] To overcome the shortcomings mentioned above, this utility model aims to provide a technical solution that can solve the above problems.

[0004] An automatic transmission includes a first gearbox housing and a second gearbox housing disposed outside the first gearbox housing. A drive mechanism is disposed inside the first gearbox housing, and the drive mechanism is connected to an output shaft that can be configured and assembled with a tool. The output shaft is located at one end of the first gearbox housing. A motor connection cover is disposed at the other end of the first gearbox housing, and a first motor is disposed on one side of the motor connection cover to drive the drive mechanism and the output shaft to rotate. A speed regulating mechanism for adjusting the speed of the drive mechanism is disposed inside the second gearbox housing, and a second motor for driving the speed regulating mechanism is disposed at one end of the second gearbox. The second motor is fixed to the second gearbox and together with the second gearbox, fixed to the first gearbox housing.

[0005] Preferably, the drive mechanism includes a first sun gear disposed inside one side of the first gearbox housing and coaxially driven by the first motor, a second sun gear meshing with the first sun gear on one side, an output planetary carrier meshing with the second sun gear on one side, and a coaxial drive connection between the output planetary carrier and the output shaft.

[0006] Preferably, a fourth gear ring is provided between the first motor and the first sun gear, and the fourth gear ring is vertically located on the other side of the motor connecting cover. A motor gear is also coaxially driven at the connection between the first motor and the first sun gear. At least three first planetary gears are meshed with the external parts of the motor gears, and the first planetary gears mesh with the fourth gear ring. A first gasket is provided between the fourth gear ring and the motor connecting cover.

[0007] Preferably, at least three fifth gear rings are provided between the first sun gear and the second sun gear, and the fifth gear rings are all distributed around the second sun gear and rotate on their own axis at the periphery of the second sun gear. The second sun gear is fitted with a second gear ring, which moves inside the first gearbox housing. A shift steel wire that moves synchronously with the second gear ring is provided outside the second gear ring. The second gear ring rotates on the side of the shift steel wire, and the shift steel wire is driven by the speed regulating mechanism.

[0008] Preferably, an output planetary carrier meshing with the second sun gear is provided on one side, and the output shaft is located on the other side of the output planetary carrier. The output planetary carrier and the output shaft are coaxially connected. A third gear ring is provided between the second sun gear and the output planetary carrier. The third gear ring is located inside the first gear housing. One end of the third gear ring is attached to the inside of the first gear housing, and the upper and lower ends of the other side are laterally provided with pins to secure it inside the first gear housing. The output planetary carrier is laterally located inside the third gear ring, and second planetary gears meshing with the third gear ring are distributed around the outside of the output planetary carrier.

[0009] Preferably, a bushing is provided between the output shaft and the first gearbox housing, and the bushing is inserted into one end of the first gearbox housing. The output shaft passes through the bushing and rotates inside the bushing. A second shim and a third shim are provided between the output shaft and the bushing, and the second shim and the third shim are distributed at both ends of the bushing. The output shaft passes through the second shim and the third shim, and a retaining ring is provided on one side of the third shim and inserted into the output shaft.

[0010] Preferably, the speed regulating mechanism includes a shift paddle disposed outside the first gearbox housing and movable outside the first gearbox housing, and the shift paddle has grooves formed on both sides for the shift steel wire to pass through and slide, and the shift paddle engages with the second motor for transmission.

[0011] Preferably, the speed regulating mechanism further includes a pinion gear set that is coaxially driven with the second motor, and the pinion gear set is located inside the motor mounting bracket. A first gear ring that meshes with the pinion gear set is provided inside the motor mounting bracket. One end of the pinion gear set is connected to a shift gear that meshes with the shift paddle. The shift gear is located inside the second gearbox housing and rotates inside the second gearbox housing. A bearing is provided at the movable connection between the shift gear and the second gearbox housing.

[0012] Preferably, an electronic board is provided between the first gearbox housing and the second gearbox housing for electrical connection with the first motor and the second motor, and the electronic board is electrically connected to an external control terminal.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: when the compatible tool is inserted into the output shaft, the first motor drives the drive mechanism to rotate together with the output shaft, and the output shaft rotates while driving the tool to rotate. However, since some tools need to adjust the speed of the output shaft in different application scenarios, the second motor drives the speed adjustment mechanism to adjust the transmission speed of the drive mechanism, so that the speed of the output shaft of the drive mechanism is also adjusted accordingly, so as to meet the needs of the matching tool in different application scenarios.

[0014] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of an automatic transmission.

[0017] Figure 2 This is another structural diagram of an automatic transmission;

[0018] Figure 3 This is a schematic diagram of the structure of the first motor;

[0019] Figure 4 This is a schematic diagram of the second motor.

[0020] Figure 5 This is an exploded view of the structure of an automatic transmission.

[0021] The diagram shows: 1. First motor, 2. First gearbox housing, 3. Output shaft, 4. Second motor, 5. Second gearbox housing, 6. Shift paddle, 7. First gear ring, 8. Shift gear, 9. Second gear ring, 10. Shift steel wire, 11. Third gear ring, 12. Second motor mounting bracket, 13. Pinion gear set, 14. Electronic board, 15. Slide groove, 16. Motor connection cover, 17. First gasket, 18. Motor gear, 19. Fourth gear ring, 20. First planetary gear, 21. First sun gear, 22. Fifth gear ring, 23. Second sun gear, 24. Pin, 25. Second planetary gear, 26. Output planetary carrier, 27. Second gasket, 28. Bushing, 29. Third gasket, 30. Snap ring, 31. Bearing. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Please see Figure 1-5 In this embodiment of the present invention, the automatic transmission includes a first gearbox housing 2 and a second gearbox housing 5 disposed outside the first gearbox housing 2. A drive mechanism is disposed inside the first gearbox housing 2, and the drive mechanism is connected to an output shaft 3 that can be configured and assembled with a tool. The output shaft 3 is located at one end of the first gearbox housing 2. A motor connection cover 16 is disposed at the other end of the first gearbox housing 2, and a first motor 1 is disposed on one side of the motor connection cover 16 to drive the drive mechanism and the output shaft 3 to rotate. A speed regulating mechanism for adjusting the speed of the drive mechanism is disposed inside the second gearbox housing 5, and a drive speed regulating mechanism is disposed at one end of the second gearbox housing 5. The second motor 4 is used to operate the mechanism, and the second motor 4 is fixed to the second gearbox 5 and together with the second gearbox 5, fixed to the first gearbox housing 2. So when the matching tool is inserted into the output shaft 3, the first motor 1 drives the drive mechanism to rotate together with the output shaft 3. The output shaft 3 rotates and drives the tool to rotate at the same time. However, since some tools need to adjust the speed of the output shaft 3 for different application scenarios, the second motor 4 drives the speed adjustment mechanism to adjust the transmission speed of the drive mechanism, so that the speed of the output shaft 3 driven by the drive mechanism is also adjusted accordingly, so as to meet the needs of the matching tool in different application scenarios.

[0024] The drive mechanism includes a first sun gear 21 disposed inside one side of the first gearbox housing 2 and coaxially driven by the first motor 1, a second sun gear 23 meshing with the first sun gear 21 on one side, an output planetary carrier 26 meshing with the second sun gear 23 on one side, and the output planetary carrier 26 and the output shaft 3 being coaxially connected.

[0025] A fourth gear ring 19 is provided between the first motor 1 and the first sun gear 21, and the fourth gear ring 19 is vertically located on the other side of the motor connecting cover 16. A motor gear 18 is also coaxially driven at the connection between the first motor 1 and the first sun gear 21. At least three first planetary gears 20 are meshed with the outside of the motor gear 18, and the first planetary gears 20 are all meshed with the fourth gear ring 19. A first gasket 17 is provided between the fourth gear ring 19 and the motor connecting cover 16, so that when the first motor 1 drives the first sun gear 21 to rotate, the motor gear 18 also rotates at the same time, and simultaneously drives at least three first planetary gears 20 to revolve along the inner wall of the fourth gear ring 19, making the transmission of the first sun gear 21 more stable.

[0026] At least three fifth gear rings 22 are provided between the first sun gear 21 and the second sun gear 23, and the fifth gear rings 22 are all distributed around the second sun gear 23. The fifth gear rings 22 rotate on their own axis at the periphery of the second sun gear 23. A second gear ring 9 is sleeved on the outside of the second sun gear 23 and moves inside the first gearbox housing 2. A shift steel wire 10 is provided on the outside of the second gear ring 9 and moves synchronously with it. The second gear ring 9 rotates on the side of the shift steel wire 10 and the shift steel wire 10 is driven by a speed regulating mechanism. The speed regulating mechanism drives the shift steel wire 10 and the second gear ring 9 to move inside the first gearbox housing 2, so that the second gear ring 9 can mesh with the first sun gear 21 and the fifth gear rings 22 with different numbers of teeth, thereby adjusting the speed and torque of the output shaft 3.

[0027] The second sun gear 23 has an output planetary carrier 26 meshing with it on one side, and the output shaft 3 is located on the other side of the output planetary carrier 26. The output planetary carrier 26 and the output shaft 3 are coaxially connected, so that when the output planetary carrier 26 rotates, it drives the output shaft 3 to rotate. A third gear ring 11 is provided between the second sun gear 23 and the output planetary carrier 26. The third gear ring 11 is located inside the first gear housing 2. One end of the third gear ring 11 is attached to the inside of the first gear housing 2, and the upper and lower ends of the other side are horizontally provided with pins 24 to secure it inside the first gear housing 2. The output planetary carrier 26 is horizontally located inside the third gear ring 11, and the outside of the output planetary carrier 26 is surrounded by second planetary gears 25 that mesh with the third gear ring 11. Thus, through the meshing transmission between the second planetary gears 25 and the third gear ring 11, the output planetary carrier 26 drives the output shaft 3 to rotate more smoothly.

[0028] A bushing 28 is provided between the output shaft 3 and the first gearbox housing 2, and the bushing 28 is inserted into one end of the first gearbox housing 2. The output shaft 3 passes through the bushing 28 and rotates inside the bushing 28. A second washer 27 and a third washer 29 are provided between the output shaft 3 and the bushing 28. The second washer 27 and the third washer 29 are located at both ends of the bushing 28. The output shaft 3 passes through the second washer 27 and the third washer 29. A retaining ring 30 is provided on one side of the third washer 29 and inserted into the output shaft 3.

[0029] The speed regulating mechanism includes a shift paddle 6 disposed outside the first gearbox housing 2 and movable outside the first gearbox housing 2. The shift paddle 6 has grooves 15 formed on both sides for the shift steel wire 10 to pass through and slide. The shift paddle 6 is engaged with the second motor 4, thereby driving the shift paddle 6 to move outside the first gearbox housing 2 through the second motor 4. While the shift paddle 6 is rotating, the shift steel wire 10 can be driven to slide through the grooves 15, thereby causing the second gear ring 9 to move inside the first gearbox housing 2. This allows the second gear ring 9 to mesh with the first sun gear 21 and the fifth gear ring 22 with different numbers of teeth, thereby adjusting the speed and torque of the output shaft 3.

[0030] The speed regulating mechanism also includes a pinion gear set 13 that is coaxially driven with the second motor 4. The pinion gear set 13 is located inside the motor mounting bracket 12. A first gear ring 7 that meshes with the pinion gear set 13 is provided inside the motor mounting bracket 12. One end of the pinion gear set 13 is connected to a shift gear 8 that meshes with the shift paddle 6. The shift gear 8 is located inside the second gearbox housing 5 and rotates inside the second gearbox housing 5. A bearing 31 is provided at the movable connection between the shift gear 8 and the second gearbox housing 5.

[0031] An electronic board 14 is provided between the first gearbox housing 2 and the second gearbox housing 5, which is electrically connected to the first motor 1 and the second motor 4. The electronic board 14 is also electrically connected to an external control terminal, thereby controlling and driving the first motor 1 and the second motor 4 through the external control terminal.

[0032] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention.

Claims

1. An automatic transmission, comprising a first gearbox housing and a second gearbox housing disposed outside the first gearbox housing, characterized in that, The first gearbox housing is equipped with a drive mechanism, and the drive mechanism is connected to an output shaft that can be configured and assembled with a tool. The output shaft is located at one end of the first gearbox housing. The other end of the first gearbox housing is equipped with a motor connection cover. A first motor is provided on one side of the motor connection cover to drive the drive mechanism and the output shaft to rotate. The second gearbox housing is equipped with a speed regulating mechanism to regulate the speed of the drive mechanism. A second motor is provided at one end of the second gearbox to drive the speed regulating mechanism. The second motor is fixed to the second gearbox and together with the second gearbox, fixed to the first gearbox housing.

2. The automatic transmission according to claim 1, characterized in that, The drive mechanism includes a first sun gear disposed inside one side of the first gearbox housing and coaxially driven by the first motor, a second sun gear meshing with the first sun gear on one side, an output planetary carrier meshing with the second sun gear on one side, and a coaxial drive connection between the output planetary carrier and the output shaft.

3. The automatic transmission according to claim 2, characterized in that, A fourth gear ring is provided between the first motor and the first sun gear, and the fourth gear ring is vertically located on the other side of the motor connecting cover. A motor gear is also coaxially driven at the connection between the first motor and the first sun gear. At least three first planetary gears are meshed with the external parts of the motor gears, and the first planetary gears are meshed with the fourth gear ring. A first gasket is provided between the fourth gear ring and the motor connecting cover.

4. The automatic transmission according to claim 2, characterized in that, At least three fifth gear rings are provided between the first sun gear and the second sun gear, and the fifth gear rings are all distributed around the second sun gear and rotate on their own axis at the periphery of the second sun gear. The second sun gear is fitted with a second gear ring, which moves inside the first gearbox housing. A shift steel wire that moves synchronously with the second gear ring is provided outside the second gear ring. The second gear ring rotates on the side of the shift steel wire, and the shift steel wire is driven by the speed regulating mechanism.

5. The automatic transmission according to claim 2, characterized in that, The second sun gear has an output planetary carrier that meshes with it on one side, and the output shaft is located on the other side of the output planetary carrier. The output planetary carrier and the output shaft are coaxially connected. A third gear ring is provided between the second sun gear and the output planetary carrier. The third gear ring is located inside the first gear housing. One end of the third gear ring is attached to the inside of the first gear housing, and the upper and lower ends of the other side are laterally provided with pins to secure it inside the first gear housing. The output planetary carrier is laterally located inside the third gear ring, and second planet gears that mesh with the third gear ring are distributed around the outside of the output planetary carrier.

6. The automatic transmission according to claim 1, characterized in that, A bushing is provided between the output shaft and the first gearbox housing, and the bushing is inserted into one end of the first gearbox housing. The output shaft passes through the bushing and rotates inside the bushing. A second shim and a third shim are provided between the output shaft and the bushing, and the second shim and the third shim are located at both ends of the bushing. The output shaft passes through the second shim and the third shim, and a retaining ring is provided on one side of the third shim and inserted into the output shaft.

7. The automatic transmission according to claim 1, characterized in that, The speed regulating mechanism includes a shift paddle disposed outside the first gearbox housing and movable outside the first gearbox housing. The shift paddle has grooves formed on both sides for the shift steel wire to pass through and slide. The shift paddle engages with the second motor for transmission.

8. The automatic transmission according to claim 7, characterized in that, The speed regulating mechanism also includes a pinion gear set that is coaxially driven with the second motor. The pinion gear set is located inside the motor mounting bracket, and a first gear ring that meshes with the pinion gear set is provided inside the motor mounting bracket. One end of the pinion gear set is connected to a shift gear that meshes with the shift paddle. The shift gear is located inside the second gearbox housing and rotates inside the second gearbox housing. A bearing is provided at the movable connection between the shift gear and the second gearbox housing.

9. The automatic transmission according to claim 1, characterized in that, An electronic board is provided between the first gearbox housing and the second gearbox housing, which is electrically connected to the first motor and the second motor, and the electronic board is electrically connected to an external control terminal.

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