Steering wheel and transportation device

Abstract

The utility model provides a steering wheel and transportation device, including steering wheel frame, driver, steering driver and bearing, driver and steering driver are both provided the bottom surface of steering wheel frame, the steering driver is connected with the steering gear, the bearing is provided the top surface of steering wheel frame, the top end of steering wheel frame is fixedly connected with the inner ring of bearing, and the bearing is connected with the steering gear. Outer teeth are arranged on the outer side of an outer ring of the bearing, the steering gear is meshed with the outer teeth of the bearing, and a vehicle body installation position is arranged on the outer ring of the bearing. According to the steering wheel, the part structure and the electrical layout are optimized, the manufacturing cost is reduced, the steering wheel is provided with the driver and the steering driver which are high in integration level, the number of outgoing lines is reduced, the risk that wire harnesses are twisted and broken is reduced, the stability and reliability of the steering wheel are improved, meanwhile, installation is easier and more convenient, the difficulty of later maintenance is reduced, and the service life of the steering wheel is prolonged. The steering wheel is small in occupied space, good stability is achieved while good bearing capacity is guaranteed, and the unmanned trolley with the steering wheel can move in any direction in the plane.

Description

Technical Field

[0001] The utility model relates to the technical field of logistics automation, in particular to a steering wheel and a transport device. Background Art

[0002] Currently, unmanned transport vehicles have various driving modes such as single-wheel drive, differential drive, and omnidirectional drive. Among them, omnidirectional drive is a relatively common mode and is widely used in various unmanned transport vehicles. However, the steering wheel structure used in existing omnidirectional drives is complex, and there are many outgoing wires. There is a risk of wire harness breakage during driving, and the stability is not high. In addition, the manufacturing and maintenance costs are high.

[0003] Improvements to the existing technology are needed. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a steering wheel and a transport device which have a reasonable structure, high reliability and are easy to use.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is: a steering wheel, including a steering wheel frame, a driver, a steering driver and a bearing, the driver and the steering driver are both arranged on the bottom surface of the steering wheel frame, the drive shaft of the driver is connected to the drive wheel, the drive shaft of the steering driver is connected to the steering gear, the bearing is arranged on the top surface of the steering wheel frame, the top of the steering wheel frame is fixedly connected to the inner ring of the bearing, the outer side of the outer ring of the bearing is provided with external teeth, the steering gear is engaged with the external teeth of the bearing, and the outer ring of the bearing is provided with a vehicle body mounting position.

[0006] Furthermore, the steering wheel frame is provided with an arc-shaped groove corresponding to the outer ring of the bearing, a sensor is provided in the arc-shaped groove, and the outer ring of the bearing is provided with a sensor trigger.

[0007] Furthermore, there are three sensors, one sensor is provided at each end of the arc-shaped groove, and one sensor is provided in the middle of the arc-shaped groove.

[0008] Furthermore, the sensor is a contact sensor, and the sensor triggering member is a triggering screw.

[0009] Furthermore, the bearing is a four-point contact ball bearing.

[0010] Furthermore, the driver includes a reduction gearbox.

[0011] Furthermore, the reduction ratio of the reduction box is 30-40.

[0012] Furthermore, the driver is a DC motor or a stepping motor.

[0013] Furthermore, the power of the driver is at least 300 watts.

[0014] The utility model also relates to a transport device, comprising the steering wheel as described in any one of the above items.

[0015] The beneficial effects of the present invention are: providing a steering wheel with optimized parts structure and electrical layout, reducing the manufacturing cost of the steering wheel, the steering wheel has a highly integrated driver and steering driver, reducing the number of outgoing wires, reducing the risk of wiring harness twisting and breaking, improving the stability and reliability of the steering wheel, and also making installation simpler and more convenient, reducing the difficulty of subsequent maintenance, the steering wheel occupies a small space, has good stability while ensuring good load-bearing capacity, and enables the unmanned vehicle equipped with the steering wheel to move in any direction within a plane. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The specific structure of the utility model is described in detail below with reference to the accompanying drawings:

[0017] Figure 1 This is a schematic diagram of the overall structure of the steering wheel of the present invention;

[0018] Figure 2 This is a schematic diagram of the explosion structure of the steering wheel of the present invention;

[0019] 1-steering wheel frame; 11-arc groove; 12-drive bracket; 13-reinforcement beam; 14-reinforcement rib;

[0020] 2-Driver; 21-Drive Wheel;

[0021] 3-steering drive; 31-steering gear;

[0022] 4-bearing; 41-inner ring; 42-outer ring; 421-outer gear; 43-sensor trigger;

[0023] 5-Sensor. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0025] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0026] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features being referred to. Thus, features defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this utility model, "plurality" means two or more, unless otherwise specifically defined.

[0027] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0028] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0029] In the description of this specification, the reference terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms should not be understood as necessarily referring to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification.

[0030] Example

[0031] See also Figure 1 as well as Figure 2 This embodiment provides a steering wheel, including a steering wheel frame 1, a driver 2, a steering driver 3 and a bearing 4. The driver 2 and the steering driver 3 are both arranged on the bottom surface of the steering wheel frame 1, the driving shaft of the driver 2 is connected to the driving wheel 21, and the driving shaft of the steering driver 3 is connected to the steering gear 31. The bearing 4 is arranged on the top surface of the steering wheel frame 1, the top of the steering wheel frame 1 is fixedly connected to the inner ring 41 of the bearing 4, the outer side of the outer ring 42 of the bearing 4 is provided with external teeth 421, the steering gear 31 is engaged with the external teeth 421 of the bearing 4, and the outer ring 42 of the bearing 4 is provided with a vehicle body mounting position.

[0032] In this embodiment, a driver bracket 12 is provided on each side of the driver 2, and the driver 2 is installed on the bottom surface of the steering wheel frame 1 through the driver bracket 12. A reinforcing beam 13 is also provided between the two driver brackets 12, and a reinforcing rib 14 is also provided between each driver bracket 12 and the steering wheel frame 1. Through the reinforcing beam 13 and the reinforcing rib 14, the overall stability of the structure can be significantly improved during the operation of the steering wheel, and the load-bearing capacity is enhanced, so that the steering wheel frame 1 has higher overall stiffness and seismic resistance, and can withstand larger loads.

[0033] The rotating shaft of the driver 2 is connected to the driving wheel 21, and the steering driver 3 is arranged on the side of the driving wheel 21 away from the driver 2, so that the overall structure of the steering wheel is more compact.

[0034] In order to enable the steering drive 3 to drive the driving wheel 21 to steer, a bearing 4 is provided on the top surface of the steering wheel frame 1. The bearing 4 includes an inner ring 41 and an outer ring 42. The outer ring 42 of the bearing 4 is rotatable relative to the inner ring 41 of the bearing 4. The inner ring 41 of the bearing 4 is fixed to the steering wheel frame 1 by screws. The outer side of the outer ring 42 of the bearing 4 is provided with an external tooth 421. The driving shaft of the steering drive 3 is connected to the steering gear 31, and the steering gear 31 is engaged with the external tooth 421 of the bearing 4. The outer ring 42 of the bearing 4 is provided with a vehicle body mounting position. The steering wheel can be connected to the vehicle body through the outer ring 42 of the bearing 4 through the vehicle body mounting position. When the steering drive 3 drives the steering gear 31 to rotate, the steering wheel frame 1 can rotate relative to the vehicle body.

[0035] Gear transmission has the characteristics of high transmission precision, compact structure, high transmission efficiency and long service life. Taking into account factors such as transmission efficiency and the required load, a gear transmission with a transmission ratio between 0.2-0.4 is selected to drive the rotation of the steering wheel.

[0036] In one embodiment, the steering wheel structure is improved to protect it from deformation or damage caused by oversteering. Specifically, the steering wheel frame 1 is provided with an arcuate groove 11 corresponding to the outer ring 42 of the bearing 4. The bottom of the arcuate groove 11 is provided with a sensor 5, and the outer ring 42 of the bearing is provided with a sensor trigger 43.

[0037] In this embodiment, an arc-shaped groove 11 is provided on the upper surface of the steering wheel frame 1. The arc-shaped groove 11 has a C-shaped structure, and the angle corresponding to the arc-shaped groove 11 is 295°. In order to prevent the driving wheel 21 from being worn as the use time increases, and the steering ability is reduced due to wear, the 295° arc-shaped groove 11 can allow the steering system to still have a certain margin after wear and tear caused by long-term use.

[0038] The center line of the arc-shaped groove 11 corresponds to the drive shaft of the steering motor 3, a sensor 5 is set at the bottom of the arc-shaped groove 11, and a sensor trigger 43 is set corresponding to the outer ring 42 of the bearing 4. When the driving wheel 21 rotates relative to the vehicle body, the rotation direction and rotation angle of the driving wheel 21 can be detected, thereby avoiding excessive rotation of the driving wheel 21 and protecting the steering wheel.

[0039] In one embodiment, the number and location of sensors 5 are improved to reduce the use of wiring harnesses and reduce the risk of wiring harness twisting and breakage. Specifically, there are three sensors 5: one at each end of the bottom of the arcuate groove 11, and one in the middle of the bottom of the arcuate groove 11.

[0040] In this embodiment, the use of three sensors 5 effectively reduces the number of wires exiting the steering wheel, reducing the risk of wire breakage due to twisting. By placing sensors 5 at both ends and in the middle of the bottom of the arcuate groove 11, the sensors 5 at both ends prevent excessive rotation of the drive wheel 21, thereby protecting the steering actuator 3.

[0041] When rotation is not required, the middle sensor 5 can keep the driving wheel 21 in a central position, so that the steering wheel can move in a straight line.

[0042] In one embodiment, the structure of the sensor 5 is improved to ensure the accuracy of triggering the sensor 5. Specifically, the sensor 5 is a contact sensor, and the sensor triggering member 43 is a triggering screw.

[0043] In this embodiment, the sensor 5 is a contact sensor, and the sensor trigger 43 on the outer ring 42 of the bearing is a trigger screw. When the outer ring 42 of the bearing is rotated into place, the trigger screw makes micro-contact with the contact sensor and is triggered, thereby activating and sending a trigger signal, enabling the steering drive to respond in time and stop the steering action.

[0044] Similarly, the sensor 5 may also be a contact photoelectric sensor or a photoelectric sensor.

[0045] In one embodiment, the structure of the bearing 4 is improved to ensure the load-bearing capacity of the steering wheel. Specifically, the bearing 4 is a four-point contact ball bearing.

[0046] In this embodiment, the four-point contact ball bearing features a compact structure, saving 50% of axial space compared to conventional bearings, ensuring a compact overall steering wheel structure. The four-point contact ball bearing can withstand both axial and radial loads, making it more suitable for unmanned vehicles than conventional bearings. The four-point contact ball bearing utilizes a split design, meaning the outer and inner rings can be installed separately, making steering wheel installation even more convenient.

[0047] In one embodiment, the structure of the driver 2 is improved to ensure that the driver 2 can output sufficient torque to drive the load to move. Specifically, the driver 2 includes a reduction gearbox.

[0048] In this embodiment, the output shaft of driver 2 is connected to the input shaft of the reduction gearbox. The reduction gearbox output shaft serves as the drive shaft. By reducing the rotational speed of driver 2's output shaft, the output torque of driver 2 meets the design requirements, achieving the desired moving speed while maintaining the required load, thereby ensuring transport efficiency. Preferably, the reduction gearbox has a reduction ratio of 30-40, and the driver 2 has a power of at least 300 watts, which meets the design requirements.

[0049] In one embodiment, the structure of the driver 2 is improved to ensure that: Specifically, the driver 2 is a DC motor or a stepping motor.

[0050] In this embodiment, the driver 2 is a DC motor or a stepper motor, and is integrated with a servo system. The highly integrated driver 2 simplifies the overall structure of the steering wheel and reduces the difficulty of installation. The driver 2 with an integrated servo system only has a power cable and a communication cable, and the steering driver 3 also only has a power cable and a communication cable, plus three sensor cables, which greatly reduces the number of outgoing wires of the steering wheel and reduces the risk of wiring harness twisting and breaking, making the steering wheel safer and more stable.

[0051] From the above description, it can be seen that the beneficial effects of the present invention are: providing a steering wheel with optimized parts structure and electrical layout, reducing the manufacturing cost of the steering wheel, the steering wheel has a highly integrated drive and steering drive, reducing the number of outgoing wires, reducing the risk of wiring harness twisting and breaking, improving the stability and reliability of the steering wheel, and also making installation simpler and more convenient, reducing the difficulty of subsequent maintenance, the steering wheel occupies a small space, has good stability while ensuring good load-bearing capacity, and enables the unmanned vehicle equipped with the steering wheel to move in any direction within a plane.

[0052] The utility model also relates to a transport device, comprising the steering wheel as described in any one of the above items.

[0053] The advantages of the transport device compared to the prior art are the same as those of the steering wheel described above, and will not be repeated here.

[0054] It is easy for those skilled in the art to understand that the above embodiments can be freely combined and superimposed without conflict.

[0055] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A steering wheel, characterized in that: It includes a steering wheel frame, a driver, a steering driver and a bearing. The driver and the steering driver are both arranged on the bottom surface of the steering wheel frame. The driving shaft of the driver is connected to the driving wheel. The driving shaft of the steering driver is connected to the steering gear. The bearing is arranged on the top surface of the steering wheel frame. The top of the steering wheel frame is fixedly connected to the inner ring of the bearing. The outer side of the outer ring of the bearing is provided with external teeth. The steering gear is engaged with the external teeth of the bearing. The outer ring of the bearing is provided with a vehicle body mounting position.

2. The steering wheel according to claim 1, characterized in that: The steering wheel frame is provided with an arc-shaped groove corresponding to the outer ring of the bearing, a sensor is provided in the arc-shaped groove, and the outer ring of the bearing is provided with a sensor trigger.

3. The steering wheel according to claim 2, characterized in that: There are three sensors, one sensor is provided at each end of the arc-shaped groove, and one sensor is provided in the middle of the arc-shaped groove.

4. The steering wheel according to claim 2, characterized in that: The sensor is a contact sensor, and the sensor triggering member is a triggering screw.

5. The steering wheel according to claim 1, characterized in that: The bearing is a four-point contact ball bearing.

6. The steering wheel according to claim 1, characterized in that: The drive includes a reduction gearbox.

7. The steering wheel according to claim 6, characterized in that: The reduction ratio of the reduction box is 30-40.

8. The steering wheel according to claim 1, characterized in that: The driver is a DC motor or a stepping motor.

9. The steering wheel according to claim 1, characterized in that: The driver has a power of at least 300 watts.

10. A transport device, characterized in that: Comprising the steering wheel according to any one of claims 1 to 9.

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