Speed reduction planet driving wheel structure

Abstract

The utility model discloses a speed reduction planet driving wheel structure which comprises a connecting frame, an output motor, a tire, a gear ring and a hub, an outer bearing is arranged in the right side end of the inner wall of the hub, the gear ring is fixed on the outer bearing, a first planet wheel set, a second planet wheel set and a third planet wheel set are connected in the gear ring, and the right side end of the first planet wheel set is arranged in a first inner bearing. The output motor fixes an output gear, the first planet gear set is connected with an intermediate gear in an engaged mode, the second planet gear set is connected with a transition gear, the transition gear is connected with the third planet gear set, the left side end of the third planet gear set is connected to the left side end of the transition gear in a sleeved mode, and the third planet gear set fixes a connecting base. A connecting seat is arranged in a connecting bearing, a power output plate is fixed on a third planet wheel set, the power output plate is fixed on a hub, a fixing bolt is arranged on the power output plate, and a positioning pin shaft is arranged on the third planet wheel set; the utility model has the advantages of simple structure, low noise, high concentricity, large transmission torque and high efficiency.

Description

Technical Field

[0001] This utility model relates to the field of planetary gear technology, specifically to a deceleration planetary drive wheel structure. Background Technology

[0002] A planetary speed reducer is a power transmission mechanism that uses gears to reduce the speed of a motor to the desired speed and obtain a larger torque. The planetary speed reducer uses a gear with fewer teeth on the drive shaft to mesh with a large gear on the output shaft to achieve the purpose of speed reduction.

[0003] Current planetary reduction drive wheels still have the following shortcomings: Most planetary reduction wheel reduction structures on the market use one or two-stage transmission mechanisms. For example, patent application number CN201520734342.6 discloses a precision planetary reducer that uses a one- or two-stage sun gear structure for reduction. Compared with three-stage gear transmission, it has lower efficiency and lower torque. Moreover, most three-stage reduction planetary drive wheels also have problems such as high noise and poor concentricity, which cannot meet market demands. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a planetary drive wheel structure with a reduction speed, which has a simple structure, low noise, high concentricity, large transmission torque and high efficiency.

[0005] To solve the above problems, the present invention adopts the following technical solution:

[0006] A planetary drive gear structure includes a connecting frame, an output motor, a tire, a gear ring, and a hub. The output motor is mounted on the right side of the connecting frame by a bolt. An outer bearing is built into the right side of the inner wall of the hub. The gear ring is fixed to the inner wall of the outer bearing. A first planetary gear set, a second planetary gear set, and a third planetary gear set are meshed within the gear ring. An inner bearing is fixed to the inner wall of the right side of the gear ring. The right side of the first planetary gear set is built into the inner bearing. An inner bearing is fixed to the inner wall of the left side of the gear ring. The third planetary gear set is built into the inner bearing. An output gear is fixed to the output end of the output motor and meshes with the first planetary gear set. An intermediate gear is meshed with the left side of the first planetary gear set. The wheel has an intermediate gear meshing with a second planetary gear set. A transition gear meshes with the left end of the second planetary gear set. The transition gear meshes with a third planetary gear set, and the left end of the third planetary gear set is sleeved on the left end of the transition gear. A connecting seat is fixed to the left end of the third planetary gear set. A connecting bearing is installed on the left end of the connecting frame, and the connecting seat is built into the connecting bearing. A power output plate is also fixed to the left end of the third planetary gear set. The power output plate is fixed to the inner wall of the left side of the hub. A fixing bolt is provided on the power output plate. The fixing bolt passes through the power output plate and is threadedly connected to the third planetary gear set. A positioning pin is fixed on the third planetary gear set, and the left end of the positioning pin passes through the power output plate.

[0007] A further technical solution is that the second planetary gear set includes a left side plate, a right side plate, and planetary gears. The planetary gears are rotatably connected between the left side plate and the right side plate, which is a conventional planetary gear set structure. Each set of planetary gears has three planetary gears. Similarly, as shown in the figure, the first planetary gear set and the third planetary gear set both include left and right side plates and three planetary gears.

[0008] A further technical solution is that gear holes are distributed on the left side plate, and the gear holes are used to mesh with the right end of the transition gear.

[0009] A further technical solution is that a partition is placed between the first planetary gear set and the second planetary gear set, as well as between the second planetary gear set and the third planetary gear set, for isolation between the planetary gear sets.

[0010] A further technical solution is that a connecting sleeve is also fixed on the left end of the connecting seat. The connection method can be threaded, snap-locked, or other methods, which mainly serves to prevent dust and water damage and stabilize rotation.

[0011] A further technical solution is that the tire is mounted and fixed on the outer circumference of the wheel hub for rolling.

[0012] The beneficial effects of this utility model are:

[0013] 1. This drive wheel adopts a three-gear combination design, namely the first planetary gear set, the second planetary gear set and the third planetary gear set. It adopts a unique design in which the first planetary gear set and the second planetary gear set have the same outer diameter and mesh with the gear ring, while the third planetary gear set has a larger outer diameter and meshes with the gear ring, which effectively increases the reduction ratio, increases torque and increases efficiency.

[0014] 2. It adopts a single gear ring and a meshing connection structure with the first, second and third planetary gear sets of different reduction stages, which can make the three planetary gear sets more concentric and the transmission efficiency higher.

[0015] 3. The third planetary gear set is used to fix the power output plate directly to output power. It is fixed with fixing bolts and a positioning pin is added to make the output power more stable and reduce the failure rate.

[0016] 4. The first and third planetary gear sets have added inner bearing 2 and inner bearing 1 for fixing, which makes the first and third planetary gear sets have better concentricity with the gear ring, and reduces gear stress, friction and noise.

[0017] 5. The left end of the third planetary gear set is sleeved on the left end of the transition gear, which increases the concentricity of the second and third planetary gear sets, thereby increasing efficiency and reducing noise.

[0018] 6. An external bearing has been added inside the wheel hub to give it better load-bearing capacity;

[0019] 7. The gear ring and the connecting frame are fitted with concentric circles and fixed with bolts, which increases the concentricity. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the accompanying drawings required for the work described in 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.

[0021] Figure 1 This is a perspective view of a planetary drive wheel structure for speed reduction according to this utility model;

[0022] Figure 2 This is a cross-sectional view of a planetary drive wheel structure for speed reduction according to this utility model;

[0023] Figure 3 This is an exploded view of a planetary drive wheel structure for speed reduction according to this utility model;

[0024] Figure 4This is a schematic diagram showing the connection of the first planetary gear set, the second planetary gear set, and the third planetary gear set in a planetary drive wheel structure of the present invention.

[0025] Figure 5 This is a schematic diagram showing the connection between the transition gear and the third planetary gear set in a planetary drive wheel structure of this utility model.

[0026] Figure 6 This is a schematic diagram of the fixing bolts installed on the third planetary gear set in a planetary drive wheel structure of this utility model;

[0027] Figure 7 This is a schematic diagram of the second planetary gear set in a planetary drive wheel structure of the present invention;

[0028] Figure 8 This is a schematic diagram of the first planetary gear set in a planetary drive wheel structure for deceleration according to this utility model.

[0029] Figure 1-8 In the middle: 1-Connecting frame, 2-Tire, 3-Output motor, 4-Connecting sleeve, 5-Connecting bearing, 6-Fixing bolt, 7-Connecting seat, 8-Outer bearing, 9-Power output plate, 10-Hub, 11-Gear ring, 12-Inner bearing one, 13-Inner bearing two, 14-First planetary gear set, 15-Second planetary gear set, 16-Output gear, 17-Intermediate gear, 18-Third planetary gear set, 19-Transition gear, 20-Positioning pin, 21-Bolt one, 22-Partition plate, 151-Left side plate, 152-Planet gear, 153-Right side plate, 154-Gear hole. Detailed Implementation

[0030] The preferred embodiments of this utility model will be described in detail below so that the advantages and features of this utility model can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of this utility model.

[0031] See Figures 1 to 8As shown, a planetary drive gear structure includes a connecting frame 1, an output motor 3, a tire 2, a gear ring 11, and a hub 10. The output motor 3 is mounted on the right side of the connecting frame 1 by bolt 21. An outer bearing 8 is built into the right side of the inner wall of the hub 10. The gear ring 11 is fixed to the inner wall of the outer bearing 8. A first planetary gear set 14, a second planetary gear set 15, and a third planetary gear set 18 are meshed within the gear ring 11. An inner bearing 12 is fixed to the inner wall of the right side of the gear ring 11. The right side of the first planetary gear set 14 is built into the inner bearing 12. An inner bearing 23 is fixed to the inner wall of the left side of the gear ring 11. The third planetary gear set 18 is built into the inner bearing 23. An output gear 16 is fixed to the output end of the output motor 3. The output gear 16 meshes with the first planetary gear set 14. The left side of the first planetary gear set 14 is meshed with... An intermediate gear 17 is connected to the second planetary gear set 15. A transition gear 19 is connected to the left side of the second planetary gear set 15. The transition gear 19 is connected to the third planetary gear set 18, and the left side of the third planetary gear set 18 is sleeved on the left side of the transition gear 19. A connecting seat 7 is fixed to the left side of the third planetary gear set 18. A connecting bearing 5 is installed on the left side of the connecting frame 1. The connecting seat 7 is built into the connecting bearing 5. A power output plate 9 is also fixed to the left side of the third planetary gear set 18. The power output plate 9 is fixed to the left inner wall of the hub 10. A fixing bolt 6 is provided on the power output plate 9. The fixing bolt 6 passes through the power output plate 9 and is threadedly connected to the third planetary gear set 18. A positioning pin 20 is fixed on the third planetary gear set 18. The left side of the positioning pin 20 passes through the power output plate 9.

[0032] The second planetary gear set 15 includes a left side plate 151, a right side plate 153, and planetary gears 152. The planetary gears 152 are rotatably connected between the left side plate 151 and the right side plate 153, forming a conventional planetary gear set structure. Each set of planetary gears 152 has three planetary gears. Similarly, as... Figure 3 As shown, both the first planetary gear set 14 and the third planetary gear set 18 include left and right side plates and three planetary gears. Gear holes 154 are distributed on the left side plate 151, which are used for meshing with the right end of the transition gear 19. A partition plate 22 is also placed between the first planetary gear set 14 and the second planetary gear set 15, and between the second planetary gear set 15 and the third planetary gear set 18, for isolation between the planetary gear sets. A connecting sleeve 4 is also fixed to the left end of the connecting seat 7; the connection method can be threaded, keyed, or other methods, mainly serving to prevent dust and water damage and stabilize rotation. The tire 2 is mounted and fixed on the outer circumference of the hub 10 for rolling.

[0033] In this embodiment, the output motor 3 starts and drives the output gear 16 to rotate. The output gear 16 meshes with the planetary gears in the first planetary gear set 14, and the planetary gears in the first planetary gear set 14 are meshed with the inner wall of the gear ring 11. The rotation of the output gear 16 drives the first planetary gear set 14 to rotate. After the first planetary gear set 14 rotates, it drives the intermediate gear 17 to rotate. The left end of the intermediate gear 17 meshes with the planetary gear 152 in the second planetary gear set 15. The rotation of the intermediate gear 17 drives the second planetary gear set 15 to rotate. After rotation, its left end meshes with the transition gear 19. The rotation of the second planetary gear set 15 drives the transition gear 19 to rotate. The transition gear 19 then meshes with the planetary gears in the third planetary gear set 18. The rotation of the transition gear 19 drives the third planetary gear set 18 to rotate. After the third planetary gear set 18 rotates, its left end drives the power output plate 9 to rotate. The power output plate 9 drives the wheel hub 10 to rotate, ultimately enabling the tire 2 to move. The left end of the third planetary gear set 18 is sleeved on the left end of the transition gear 19 to improve concentricity.

[0034] Among them, there are 6 fixing bolts 6 with a diameter of M20, and 6 bolts 21 with a diameter of M8. The second planetary gear set 15 and the first planetary gear set 14 are located on the same inner and outer diameter of the gear ring 11. Figure 2 As shown, the outer diameter of the third planetary gear set 18 is larger than the outer diameters of the second planetary gear set 15 and the first planetary gear set 14.

[0035] The above description is only a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any changes or substitutions that can be conceived without creative effort should be covered within the protection scope of this utility model.

Claims

1. A planetary drive wheel structure for speed reduction, comprising a connecting frame, an output motor, a tire, a gear ring, and a hub, characterized in that: The output motor is mounted on the right side of the connecting frame via bolt 1. An outer bearing is built into the right side of the inner wall of the hub. The gear ring is fixed to the inner wall of the outer bearing. A first planetary gear set, a second planetary gear set, and a third planetary gear set are meshed within the gear ring. An inner bearing 1 is fixed to the inner wall of the right side of the gear ring. The right side of the first planetary gear set is housed within the inner bearing 1. An inner bearing 2 is fixed to the inner wall of the left side of the gear ring. The third planetary gear set is housed within the inner bearing 2. An output gear is fixed to the output end of the output motor. The output gear meshes with the first planetary gear set. An intermediate gear meshes with the left side of the first planetary gear set. The intermediate gear meshes with the second planetary gear set. The second planetary gear set is meshed with a transition gear on its left side. The transition gear meshes with the third planetary gear set, and the left side of the third planetary gear set is sleeved on the left side of the transition gear. A connecting seat is fixed to the left side of the third planetary gear set, and a connecting bearing is installed on the left side of the connecting frame. The connecting seat is built into the connecting bearing. A power output plate is also fixed to the left side of the third planetary gear set. The power output plate is fixed to the inner wall of the left side of the hub. A fixing bolt is provided on the power output plate. The fixing bolt passes through the power output plate and connects to the third planetary gear set. A positioning pin is fixed on the third planetary gear set, and the left side of the positioning pin passes through the power output plate.

2. The planetary drive wheel structure for speed reduction according to claim 1, characterized in that: The second planetary gear set includes a left side plate, a right side plate, and planetary gears, with the planetary gears rotatably connected between the left side plate and the right side plate.

3. The planetary drive wheel structure for deceleration according to claim 2, characterized in that: Gear holes are distributed on the left side plate.

4. The planetary drive wheel structure for reduction according to claim 1, characterized in that: A partition is also placed between the first planetary gear set and the second planetary gear set, as well as between the second planetary gear set and the third planetary gear set.

5. The planetary drive wheel structure for deceleration according to claim 1, characterized in that: A connecting sleeve is also fixed on the left end of the connector.

6. The planetary drive wheel structure for speed reduction according to claim 1, characterized in that: The tire is mounted and fixed on the outer circumference of the wheel hub.

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