Single-wheel inverted steering wheel

Abstract

The utility model relates to the technical field of AGV steering wheels, and discloses a single-wheel inverted steering wheel which comprises a mounting disc, an outer gear ring, a single-wheel box body, a mounting shell, a connecting plate and a driving mechanism, the connecting plate is supported on the top face of the mounting disc, the outer gear ring is rotatably inserted into the mounting disc and located in the connecting plate, and the single-wheel box body is arranged in the mounting shell. The upper end of the single-wheel box body is fixedly arranged on the bottom face of the outer gear ring, a driving wheel is arranged at the lower end of the single-wheel box body, the mounting shell covers the connecting plate, a sealing cavity is formed among the mounting shell, the connecting plate, the mounting disc and the single-wheel box body, a transmission motor and a steering motor are arranged on the connecting plate, and the transmission motor is connected with a driving mechanism through a first gear transmission mechanism. The steering motor is meshed with the outer gear ring through the second gear transmission mechanism, and the first gear transmission mechanism and the second gear transmission mechanism are arranged in the sealing cavity. The gear is fully lubricated, grease is prevented from overflowing and dripping, a cable is prevented from being abraded and broken, 360-degree unlimited steering is achieved, and aging of the wheel face of the driving wheel is avoided.

Description

Technical Field

[0001] This utility model relates to the field of AGV steering wheel technology, and in particular to a single-wheel inverted steering wheel. Background Technology

[0002] Currently, single-wheel inverted steering wheels are a common structure in AGV steering wheels. However, existing single-wheel inverted steering wheels have exposed steering gears, which not only lack sufficient lubrication, affecting transmission, but also allow grease to easily drip onto the ground, causing slippage of the drive unit and ground contamination, making them unsuitable for use in the food and medical industries. All motor and sensor wires rotate together during steering, making them very prone to wear and breakage, a persistent problem for engineers. Furthermore, existing single-wheel inverted steering wheels cannot achieve unrestricted 360° steering. In addition, the heat generated by the motor, brake, and reducer is concentrated at temperatures reaching 70-80°C, all close to the drive wheel, causing heat transfer to the wheel surface. This high wheel surface temperature easily leads to wheel surface aging, fatigue, and delamination. Utility Model Content

[0003] To solve the above-mentioned technical problems, this utility model provides a single-wheel inverted steering wheel, which avoids the exposure of steering and transmission gears, ensures sufficient lubrication of gears, prevents grease from spilling onto the road surface and causing slippage, avoids cable wear and breakage, achieves 360° unrestricted steering, and avoids aging of the drive wheel surface.

[0004] The technical solution adopted by this utility model to solve its technical problem is:

[0005] A single-wheel inverted steering wheel includes a mounting plate, an external gear ring, a single-wheel housing, a mounting shell, a connecting plate, and a drive mechanism. The connecting plate is supported on the top surface of the mounting plate. The external gear ring is rotatably inserted into the mounting plate and located inside the connecting plate. The upper end of the single-wheel housing is fixed to the bottom surface of the external gear ring, and the lower end of the single-wheel housing is provided with a drive wheel. The drive mechanism is located inside the single-wheel housing and connected to the drive wheel. The mounting shell covers the connecting plate. A sealed cavity is formed between the mounting shell, the connecting plate, the mounting plate, and the single-wheel housing. A transmission motor and a steering motor are provided on the bottom surface of the connecting plate. The transmission motor is connected to the drive mechanism through a first gear transmission mechanism. The output shaft of the steering motor is connected to a second gear transmission mechanism, which meshes with the external gear ring. Both the first gear transmission mechanism and the second gear transmission mechanism are located within the sealed cavity.

[0006] Preferably, the first gear transmission mechanism includes a driven gear rotatably inserted into the single-wheel housing, a transmission shaft inserted into the driven gear, and a first drive gear connected to the lower end of the transmission shaft, the first drive gear being connected to the drive mechanism;

[0007] The output shaft of the drive motor is provided with a driving gear, and the driving gear meshes with the driven gear through a first connecting gear.

[0008] Preferably, the driving mechanism includes a driving shaft, the upper end of which is provided with a second driving gear that meshes with the first driving gear, and the lower end of which is provided with a first bevel gear. The first bevel gear is meshed with the second bevel gear, and the second bevel gear is connected to the driving wheel.

[0009] Preferably, the single-wheel housing includes a connecting part and a main body, the connecting part is connected to the external gear ring, and the lower end of the main body is connected to the drive wheel.

[0010] Preferably, the connecting part has a mounting hole in the middle, a bearing is provided in the mounting hole, and the drive shaft is inserted into the inner ring of the bearing.

[0011] Preferably, the second gear transmission mechanism includes a steering gear connected to the steering motor, and the steering gear meshes with the external gear ring through a second connecting gear.

[0012] Preferably, the output end of the steering motor is connected to a reducer, and the steering gear is mounted on the output end of the reducer.

[0013] Preferably, the mounting housing is provided with an oil plug that communicates with the sealing cavity.

[0014] Preferably, the drive wheel includes a hub and a rim, with the rim disposed on the outer side of the hub.

[0015] Preferably, an encoder for detecting the rotation angle is provided on the output shaft of the steering motor or on the second gear transmission mechanism.

[0016] This utility model discloses a single-wheel inverted steering wheel, which, compared with the prior art, has the following advantages: By setting a connecting plate on the top surface of the mounting plate, the external gear ring is rotatably inserted into the mounting plate and located inside the connecting plate. Simultaneously, a sealed cavity is formed between the mounting shell, the connecting plate, the mounting plate, and the single-wheel housing. Both the first and second gear transmission mechanisms are located within this sealed cavity, thus ensuring that the steering and transmission gears are all housed within it. This prevents the steering and transmission gears from being exposed, ensuring sufficient lubrication of the gears and preventing grease from spilling onto the road surface and causing slippage. Furthermore, both the transmission motor and the steering motor are mounted on the connecting plate. The steering and movement of the drive wheel rely on the gear transmission mechanism, eliminating the need for the motor to swing or rotate. This avoids damage caused by the back-and-forth pulling of the motor cable, providing excellent cable protection and saving space. Moreover, the gear transmission mechanism connection ensures a certain distance between the drive wheel and the motor, preventing heat transfer to the wheel surface and thus avoiding fatigue and delamination caused by wheel surface aging. In addition, the steering of the drive wheel is achieved by meshing with the external gear ring through the second gear transmission mechanism. Since the external gear ring can rotate 360°, the steering wheel can be turned 360° without restriction. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the single-wheel inverted steering wheel of this utility model.

[0018] Figure 2 This is a schematic diagram of the single-wheel inverted steering wheel of this utility model without the mounting shell.

[0019] Figure 3 This is a cross-sectional view of the single-wheel inverted steering wheel of this utility model.

[0020] Figure 4 This is a diagram showing the connection between the drive mechanism and the drive wheel of the single-wheel inverted steering wheel of this utility model.

[0021] Figure 5 This is a schematic diagram of the drive mechanism of the single-wheel inverted steering wheel of this utility model.

[0022] Wherein: 1-Mounting plate, 2-External gear ring, 3-Single wheel housing, 31-Connecting part, 32-Main body, 4-Drive mechanism, 41-First bevel gear, 42-Second bevel gear, 43-Second drive gear, 5-Drive wheel, 6-Mounting shell, 7-Transmission motor, 8-Steering motor, 9-First gear transmission mechanism, 91-Passive gear, 92-Transmission shaft, 93-Drive gear, 94-First drive gear, 95-First connecting gear, 10-Second gear transmission mechanism, 101-Steering gear, 102-Second connecting gear, 20-Oil plug, 30-Connecting plate. Detailed Implementation

[0023] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.

[0024] like Figure 1-2 As shown, a preferred embodiment of the present invention provides a single-wheel inverted steering wheel, comprising a mounting plate 1, an external gear ring 2, a single-wheel housing 3, a mounting shell 6, a connecting plate 30, and a drive mechanism 4. The bottom surface of the mounting plate 1 is connected to the AGV body. The connecting plate 30 is supported on the top surface of the mounting plate 1. The external gear ring 2 is rotatably inserted into the mounting plate 1 and located inside the connecting plate 30. The mounting plate 1 is annular, and the external gear ring 2 can rotate around the center line of the mounting plate 1. The upper end of the single-wheel housing 3 is fixed to the bottom surface of the external gear ring 2, and the lower end of the single-wheel housing 3 is provided with a drive wheel 5. The drive mechanism 4 is located inside the single-wheel housing and connected to the drive wheel 5. The drive wheel 5 includes a hub and a rim, with the rim located on the outer side of the hub.

[0025] The mounting shell 6 covers the connecting plate 30, and a sealed cavity is formed between the mounting shell 6, the connecting plate 30, the mounting disc 1 and the single wheel box 3. The bottom surface of the connecting plate is provided with a drive motor 7 and a steering motor 8. The drive motor 7 is connected to the drive mechanism 4 through a first gear transmission mechanism 9. The output shaft of the steering motor 8 is connected to a second gear transmission mechanism 10. The second gear transmission mechanism 10 meshes with the external gear ring 2. Both the first gear transmission mechanism 9 and the second gear transmission mechanism 10 are located inside the sealed cavity.

[0026] The connecting plate 30 includes an annular sealing part and a mounting part. The sealing part is located between the mounting shell 6 and the mounting plate 1. The transmission motor 7 and the steering motor 8 are both mounted on the mounting part. The outer gear ring 2 has a through hole in the middle. The single wheel housing 3 covers the lower end of the through hole, thereby forming the sealing cavity between the mounting shell 6, the connecting plate 30, the mounting plate 1, and the single wheel housing 3.

[0027] Based on the above-mentioned technical features, the single-wheel inverted steering wheel has a connecting plate 30 on the top surface of the mounting plate 1. The external gear ring 2 is rotatably inserted into the mounting plate 1 and located inside the connecting plate 30. At the same time, a sealed cavity is formed between the mounting shell 6, the connecting plate 30, the mounting plate 1, and the single-wheel housing 3. The first gear transmission mechanism 9 and the second gear transmission mechanism 10 are both located in the sealed cavity, so that the steering and transmission gears are all located in the sealed cavity, avoiding exposure of the steering and transmission gears, ensuring sufficient lubrication of the gears, and preventing grease from spilling onto the road surface and causing slippage. Meanwhile, the transmission motor 7 and the steering motor 8 are both located on the connecting plate 30. The steering and movement of the drive wheel are driven by the gear transmission mechanism. The motor does not need to swing or rotate, avoiding damage caused by the back and forth pulling of the motor cable. This not only provides good protection for the cable and saves space, but also, through the connection of the gear transmission mechanism, there is a certain distance between the drive wheel and the motor, which prevents the heat source from being transferred to the wheel surface, thereby avoiding fatigue and delamination caused by wheel surface aging. In addition, the steering wheel 5 is steered by meshing with the external gear ring 2 through the steering gear 10. Since the external gear ring 2 can rotate 360°, the steering wheel can be steered without restriction at 360°.

[0028] like Figure 3 , 5 As shown, in this embodiment, the first gear transmission mechanism 9 includes a passive gear 91 rotatably inserted into the single-wheel housing 3. A transmission shaft 92 is inserted into the passive gear 91, and a first drive gear 94 is connected to the lower end of the transmission shaft 92. The first drive gear 94 is connected to the drive mechanism 4. A drive gear 93 is provided on the output shaft of the transmission motor 7. The drive gear 93 and the passive gear 91 mesh with each other through a first connecting gear 95. The drive mechanism 4 includes a drive shaft. A second drive gear 43 meshes with the first drive gear 94 at the upper end of the drive shaft. A first bevel gear 41 is provided at the lower end of the drive shaft. A second bevel gear 42 meshes with the first bevel gear 41, and the second bevel gear 42 is connected to the drive wheel 5. The drive motor 7 rotates, driving the driving gear 93 to drive the first connecting gear 95. The first connecting gear 95 drives the driven gear 91. The driven gear 91 drives the drive shaft 92. The drive shaft 92 drives the second driving gear 43. The second driving gear 43 drives the drive shaft. The drive shaft drives the first bevel gear 41 to drive the second bevel gear 42. The second bevel gear 42 is connected to the drive wheel 5 through a rotating shaft, driving the drive wheel 5 to rotate.

[0029] like Figure 4As shown, the single-wheel housing 3 includes a connecting part 31 and a main body 32. The connecting part 31 is connected to the external gear ring 2, and the lower end of the main body 32 is connected to the drive wheel 5. Meanwhile, the connecting part 31 has a mounting hole in its middle, and a bearing is installed inside the mounting hole. The drive shaft is inserted into the inner ring of the bearing, thereby enabling the driven gear 91 to drive the rotation of the transmission shaft 92.

[0030] like Figure 2 As shown, in this embodiment, the second gear transmission mechanism 10 includes a steering gear 101 connected to the steering motor 8. The steering gear 101 meshes with the external gear ring 2 through a second connecting gear 102. The steering motor 8 drives the steering gear 101 to rotate, the steering gear 101 drives the second connecting gear 102, and the second connecting gear 102 drives the external gear ring 2 to rotate the single wheel housing 3, thereby realizing the rotation and steering of the drive wheel 5.

[0031] In this embodiment, a reducer is connected to the output end of the steering motor 8, and the steering gear 10 is installed at the output end of the reducer to ensure the output speed of the steering motor 8. Meanwhile, to facilitate the detection of the rotation angle, an encoder for detecting the rotation angle is provided on the output shaft of the steering motor 8 or on the steering gear 101.

[0032] In this embodiment, the mounting shell 6 is provided with an oil plug 20 that communicates with the sealing cavity, so as to facilitate the addition of lubricating oil into the sealing cavity. The oil plug 20 is preferably a hexagonal oil plug.

[0033] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present utility model, and these improvements and substitutions should also be considered within the protection scope of the present utility model.

Claims

1. A single-wheel inverted steering wheel, characterized in that: The device includes a mounting plate, an external gear ring, a single-wheel housing, a mounting shell, a connecting plate, and a drive mechanism. The connecting plate is supported on the top surface of the mounting plate. The external gear ring is rotatably inserted into the mounting plate and located inside the connecting plate. The upper end of the single-wheel housing is fixed to the bottom surface of the external gear ring, and the lower end of the single-wheel housing is provided with a drive wheel. The drive mechanism is located inside the single-wheel housing and connected to the drive wheel. The mounting shell covers the connecting plate. A sealed cavity is formed between the mounting shell, the connecting plate, the mounting plate, and the single-wheel housing. A transmission motor and a steering motor are provided on the bottom surface of the connecting plate. The transmission motor is connected to the drive mechanism through a first gear transmission mechanism. The output shaft of the steering motor is connected to a second gear transmission mechanism, which meshes with the external gear ring. Both the first gear transmission mechanism and the second gear transmission mechanism are located within the sealed cavity.

2. The single-wheel inverted steering wheel as described in claim 1, characterized in that: The first gear transmission mechanism includes a driven gear rotatably inserted into the single-wheel housing, a transmission shaft inserted into the driven gear, and a first drive gear connected to the lower end of the transmission shaft. The first drive gear is connected to the drive mechanism. The output shaft of the drive motor is provided with a driving gear, and the driving gear meshes with the driven gear through a first connecting gear.

3. The single-wheel inverted steering wheel as described in claim 2, characterized in that: The driving mechanism includes a drive shaft, with a second drive gear meshing with the first drive gear at the upper end of the drive shaft, and a first bevel gear at the lower end of the drive shaft. The first bevel gear meshes with the second bevel gear, and the second bevel gear is connected to the drive wheel.

4. The single-wheel inverted steering wheel as described in claim 3, characterized in that: The single-wheel housing includes a connecting part and a main body. The connecting part is connected to the external gear ring, and the lower end of the main body is connected to the drive wheel.

5. The single-wheel inverted steering wheel as described in claim 4, characterized in that: The connecting part has a mounting hole in the middle, and a bearing is installed in the mounting hole. The drive shaft is inserted into the inner ring of the bearing.

6. The single-wheel inverted steering wheel as described in any one of claims 1-5, characterized in that: The second gear transmission mechanism includes a steering gear connected to the steering motor, and the steering gear meshes with the external gear ring through a second connecting gear.

7. The single-wheel inverted steering wheel as described in claim 6, characterized in that: The output end of the steering motor is connected to a reducer, and the steering gear is installed at the output end of the reducer.

8. The single-wheel inverted steering wheel as described in any one of claims 1-5, characterized in that: The mounting housing is provided with an oil plug that communicates with the sealing cavity.

9. The single-wheel inverted steering wheel as described in any one of claims 1-5, characterized in that: The drive wheel includes a hub and a rim, with the rim positioned on the outer side of the hub.

10. The single-wheel inverted steering wheel as described in any one of claims 1-5, characterized in that: An encoder for detecting the rotation angle is provided on the output shaft of the steering motor or on the second gear transmission mechanism.

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