A large torque drive for a trolley

Abstract

The utility model relates to handcart drive device technical field, especially a kind of big torque drive device for handcart, including gear housing, motor being set on gear housing, the output shaft of motor is sleeved with one-stage sun gear, one-stage planet carrier, at least three one-stage planetary gears, two-stage sun gear, two-stage planet carrier, at least three two-stage planetary gears, planetary output gear, speed reduction input gear, speed reduction output gear, power output gear, power output shaft is inserted in power output gear, the gear housing is formed with inner ring gear, speed reduction input gear is set on one side of planetary output gear and is engaged with planetary output gear meshing transmission connection, power output gear and speed reduction output gear meshing transmission connection;The utility model can obtain enough big output torque while avoiding the volume, weight etc. caused by using high-power motor problem, the utility model compact structure as a whole and have big torque, can be better applicable in handcart.

Description

Technical fields:

[0001] This utility model relates to the technical field of handcart drive devices, and in particular to a high-torque drive device for handcarts. Background technology:

[0002] Handcarts are ubiquitous in daily life, such as outdoor camping carts and supermarket carts. Most existing handcarts are moved by pushing them manually. In order to save effort, electric handcarts have appeared on the market. These handcarts are equipped with a motor drive device to drive the wheels, which replaces the manual pushing method to move the handcart.

[0003] In order to better cope with heavy loads and uphill use scenarios, the handcart drive device often needs to have a large torque. The most direct way to obtain a larger output torque is to use a motor with a larger power. This will undoubtedly lead to an excessively large overall size and increased weight of the drive device. There is an urgent need for a handcart drive device with a compact overall structure and a large torque. Utility model content:

[0004] The purpose of this invention is to provide a high-torque drive device for handcarts that addresses the shortcomings of existing technologies. The device has a compact overall structure and high torque, making it more suitable for use in handcarts.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a high-torque drive device for a handcart, comprising a gear housing, a motor mounted on the gear housing, a first-stage sun gear, a first-stage planetary carrier, at least three first-stage planetary gears, a second-stage sun gear, a second-stage planetary carrier, at least three second-stage planetary gears, a planetary output gear, a reduction input gear, a reduction output gear, a power output gear, and a power output shaft inserted into the power output gear. An internal gear ring is formed within the gear housing. The first-stage and second-stage planetary carriers are rotatably connected within the gear housing, and each first-stage planetary gear rotates evenly circumferentially. Connected to the first-stage planetary carrier, each first-stage planetary gear meshes with the first-stage sun gear and simultaneously with the top of the internal gear ring. The second-stage sun gear is located at the bottom of the first-stage planetary carrier. Each second-stage planetary gear is evenly distributed circumferentially and rotates on the second-stage planetary carrier, meshing with the second-stage sun gear and simultaneously with the bottom of the internal gear ring. The planetary output gear is located at the bottom of the second-stage planetary carrier. The reduction input gear is located on one side of the planetary output gear and meshes with it for transmission. The reduction output gear and the reduction input gear are coaxially rotatably connected. The power output gear and the reduction output gear mesh for transmission.

[0006] A further improvement to the above scheme is that the first-stage planetary carrier and the second-stage sun gear are an integrated structure.

[0007] A further improvement to the above scheme is that the secondary planetary carrier and the planetary output gear are an integral structure.

[0008] A further improvement to the above scheme is that the reduction output gear and the reduction input gear are an integral structure.

[0009] A further improvement to the above scheme is that the number of teeth on the reduction input gear is greater than the number of teeth on the reduction output gear, and the number of teeth on the reduction output gear is less than the number of teeth on the power output gear.

[0010] A further improvement to the above scheme is that the top of the power output gear is provided with a gear reinforcing rib.

[0011] A further improvement to the above scheme is that the reduction output gear is located above the reduction input gear.

[0012] The beneficial effects of this utility model are as follows: This utility model provides a high-torque drive device for handcarts, including a gear seat, a motor mounted on the gear seat, a first-stage sun gear, a first-stage planetary carrier, at least three first-stage planetary gears, a second-stage sun gear, a second-stage planetary carrier, at least three second-stage planetary gears, a planetary output gear, a reduction input gear, a reduction output gear, a power output gear, and a power output shaft inserted into the power output gear. An internal gear ring is formed inside the gear seat. The first-stage and second-stage planetary carriers are rotatably connected inside the gear seat, and each first-stage planetary gear is evenly distributed and rotatably connected circumferentially. On the first-stage planetary carrier, each first-stage planetary gear meshes with the first-stage sun gear and simultaneously with the top of the internal gear ring. The second-stage sun gear is located at the bottom of the first-stage planetary carrier. Each second-stage planetary gear is evenly distributed and rotates around the second-stage planetary carrier. Each second-stage planetary gear meshes with the second-stage sun gear and simultaneously with the bottom of the internal gear ring. The planetary output gear is located at the bottom of the second-stage planetary carrier. The reduction input gear is located on one side of the planetary output gear and meshes with the planetary output gear for transmission. The reduction output gear and the reduction input gear are coaxially rotatably connected. The power output gear and the reduction output gear are meshed for transmission.

[0013] This invention first achieves a two-stage planetary gear mechanism in series through the cooperation of a primary sun gear, a primary planetary carrier, at least three primary planetary gears, a secondary sun gear, a secondary planetary carrier, at least three secondary planetary gears, a planetary output gear, and an internal gear ring, thus achieving initial high-ratio speed reduction and torque increase. Then, through the cooperation of a reduction input gear, a reduction output gear, and a power output gear, parallel speed reduction and torque increase are achieved. This not only further increases the output torque but also avoids occupying excessive height space. This invention can obtain a sufficiently large output torque while avoiding problems such as size and weight caused by using a high-power motor. The overall structure of this invention is compact and has a large torque, making it better suited for handcarts. Attached image description:

[0014] Figure 1 This is a schematic diagram of the structure of this utility model.

[0015] Figure 2 This is a schematic diagram of the internal structure of this utility model.

[0016] Figure 3 This is a schematic diagram of the gear seat of this utility model.

[0017] Explanation of reference numerals in the attached drawings: 1. Power output shaft; 3. Power output gear; 32. Gear reinforcing rib; 51. Gear seat; 511. Internal gear ring; 52. Motor; 53. First-stage sun gear; 54. First-stage planetary carrier; 55. First-stage planetary gear; 56. Second-stage sun gear; 57. Second-stage planetary carrier; 58. Second-stage planetary gear; 59. Planetary output gear; 60. Reduction input gear; 61. Reduction output gear. Detailed implementation method:

[0018] The present invention will be further described below with reference to the accompanying drawings, such as... Figure 1-3As shown, this utility model includes a gear carrier 51, a motor 52 mounted on the gear carrier 51, a first-stage sun gear 53 sleeved on the output shaft of the motor 52, a first-stage planetary carrier 54, at least three first-stage planetary gears 55, a second-stage sun gear 56, a second-stage planetary carrier 57, at least three second-stage planetary gears 58, a planetary output gear 59, a reduction input gear 60, a reduction output gear 61, a power output gear 3, and a power output shaft 1 inserted into the power output gear 3. An internal gear ring 511 is formed inside the gear carrier 51. The first-stage planetary carrier 54 and the second-stage planetary carrier 57 are rotatably connected. The first-stage planetary gears 55 are evenly distributed and rotatably connected to the first-stage planetary carrier 54 within the gear housing 51. Each first-stage planetary gear 55 meshes with the first-stage sun gear 53 and simultaneously with the top of the internal gear ring 511. The second-stage sun gear 56 is located at the bottom of the first-stage planetary carrier 54. The second-stage planetary gears 58 are evenly distributed and rotatably connected to the second-stage planetary carrier 57. Each second-stage planetary gear 58 meshes with the second-stage sun gear 56 and simultaneously with the bottom of the internal gear ring 511. The planetary output gear 59 is located at the bottom of the second-stage planetary carrier 57. The reduction input gear... 60 is disposed on one side of the planetary output gear 59 and meshes with the planetary output gear 59 for transmission. The reduction output gear 61 is coaxially and rotatably connected to the reduction input gear 60. The power output gear 3 meshes with the reduction output gear 61 for transmission. The number of teeth on the reduction input gear 60 is greater than the number of teeth on the reduction output gear 61, and the number of teeth on the reduction output gear 61 is less than the number of teeth on the power output gear 3. This utility model first uses a first-stage sun gear 53, a first-stage planetary carrier 54, at least three first-stage planetary gears 55, a second-stage sun gear 56, a second-stage planetary carrier 57, and at least three second-stage planetary gears 58. The planetary output gear 59 and the internal gear ring 511 work together to achieve a two-stage planetary gear mechanism in series and to achieve initial high speed ratio reduction and torque increase. Then, through the cooperation of the reduction input gear 60, the reduction output gear 61, and the power output gear 3, parallel reduction and torque increase are achieved. This not only further increases the output torque, but also avoids occupying too much height space. This utility model can obtain a sufficiently large output torque while avoiding problems such as volume and weight caused by the use of a high-power motor 52. The overall structure of this utility model is compact and has a large torque, making it more suitable for handcarts.

[0019] The first-stage planetary carrier 54 and the second-stage sun gear 56 are integrated into one structure, which not only reduces the number of parts and facilitates assembly, but also avoids transmission errors caused by the fit clearance between the two parts, resulting in a smoother overall transmission.

[0020] The secondary planetary carrier 57 and the planetary output gear 59 are integrated into one structure, which not only reduces the number of parts and facilitates assembly, but also avoids transmission errors caused by the fit clearance between the two parts, resulting in a smoother overall transmission.

[0021] The reduction output gear 61 and the reduction input gear 60 are integrated into one piece, which not only reduces the number of parts and facilitates assembly, but also better ensures the coaxiality between the two parts, thus ensuring smoother transmission.

[0022] The top of the power output gear 3 is provided with a gear reinforcing rib 32, which can improve the load-bearing capacity and better ensure that the power output gear 3 can withstand large torque.

[0023] Compared to placing the reduction output gear 61 below the reduction input gear 60, the reduction output gear 61 of this utility model is located above the reduction input gear 60. The reduction output gear 61 is arranged side by side with the first-stage planetary gear 55, the second-stage planetary gear 58, etc., which can avoid occupying too much height space and achieve a flattened and compact overall structure. This makes it easier to integrate into spaces with strict height restrictions, such as the chassis or near the wheels of a handcart.

[0024] Working principle:

[0025] By connecting the power output shaft 1 to the wheel of the handcart, the motor 52 drives the first-stage sun gear 53 to rotate. With the cooperation of the internal gear ring 511, the rotation of the first-stage sun gear 53 drives the rotation of each first-stage planetary gear 55 and the first-stage planetary carrier 54. The second-stage sun gear 56 rotates synchronously with the rotation of the first-stage planetary carrier 54. With the cooperation of the internal gear ring 511, the second-stage sun gear 56 drives the rotation of each second-stage planetary gear 58 and the second-stage planetary carrier 57. The planetary output gear 59 rotates synchronously with the rotation of the second-stage planetary carrier 57. The planetary output gear 59 drives the reduction input gear 60 to rotate and drives the reduction output gear 61 to rotate. Finally, it drives the power output gear 3 to rotate, thereby realizing the rotation of the power output shaft 1 and the wheel. The overall structure of this utility model is compact and has a large torque, making it more suitable for handcarts.

[0026] Of course, the above description is only a preferred embodiment of the present utility model. Therefore, all equivalent changes or modifications made to the structure, features and principles described in the claims of the present utility model patent application are included in the scope of the present utility model patent application.

Claims

1. A high-torque drive device for a handcart, characterized in that: The system includes a gear housing (51), a motor (52) mounted on the gear housing (51), a first-stage sun gear (53) sleeved on the output shaft of the motor (52), a first-stage planetary carrier (54), at least three first-stage planetary gears (55), a second-stage sun gear (56), a second-stage planetary carrier (57), at least three second-stage planetary gears (58), a planetary output gear (59), a reduction input gear (60), a reduction output gear (61), a power output gear (3), and a power output shaft (1) inserted into the power output gear (3). An internal gear ring (511) is formed inside the gear housing (51). The first-stage planetary carrier (54) and the second-stage planetary carrier (57) are rotatably connected to the gear housing (51). Each first-stage planetary gear (55) is rotatably connected to the first-stage planetary carrier (54) in a circumferentially distributed manner. The first-stage planetary gears (55) mesh with the first-stage sun gear (53) and the top of the internal gear ring (511). The second-stage sun gear (56) is located at the bottom of the first-stage planetary carrier (54). Each second-stage planetary gear (58) is evenly distributed and rotated on the second-stage planetary carrier (57) in the circumferential direction. Each second-stage planetary gear (58) meshes with the second-stage sun gear (56) and the bottom of the internal gear ring (511). The planetary output gear (59) is located at the bottom of the second-stage planetary carrier (57). The reduction input gear (60) is located on one side of the planetary output gear (59) and meshes with the planetary output gear (59) for transmission. The reduction output gear (61) is coaxially rotatably connected with the reduction input gear (60). The power output gear (3) meshes with the reduction output gear (61) for transmission.

2. The high-torque drive device for a handcart according to claim 1, characterized in that: The primary planetary carrier (54) and the secondary sun gear (56) are an integral structure.

3. The high-torque drive device for a handcart according to claim 1, characterized in that: The secondary planetary carrier (57) and the planetary output gear (59) are an integral structure.

4. A high-torque drive device for a handcart according to claim 1, characterized in that: The reduction output gear (61) and the reduction input gear (60) are an integral structure.

5. A high-torque drive device for a handcart according to claim 1, characterized in that: The number of teeth of the reduction input gear (60) is greater than the number of teeth of the reduction output gear (61), and the number of teeth of the reduction output gear (61) is less than the number of teeth of the power output gear (3).

6. A high-torque drive device for a handcart according to claim 1, characterized in that: The top of the power output gear (3) is provided with a gear reinforcing rib (32).

7. A high-torque drive device for a handcart according to any one of claims 1-6, characterized in that: The reduction output gear (61) is located above the reduction input gear (60).

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