Heavy-load steering wheel with high precision

Abstract

The utility model relates to a heavy-load steering wheel, in particular to a high-precision heavy-load steering wheel which comprises a fixing plate, a transmission system and a steering system, the transmission system and the steering system are arranged on the fixing plate, the transmission system is located on one side of the steering system, and the transmission system comprises a wheel and a walking driving motor arranged on one side of the wheel. The output end of the walking driving motor is connected with an RV speed reducer, an internal bearing is arranged on the RV speed reducer, the wheels are installed on the internal bearing and connected with the RV speed reducer through bolts, the steering system comprises a steering connecting flange and a steering driving motor fixed to the lower end face of the steering connecting flange, and the steering driving motor is vertically arranged. The output end of the steering driving motor is connected with a straight tooth gear, and the straight tooth gear is meshed with a slewing bearing outer ring. According to the heavy-load steering wheel with the high precision, the precision can be greatly improved, the transmission error is low, the rigidity is far better than that of a traditional planet row structure, a steering wheel system can better meet the working conditions such as sudden stop and sudden start, and the impact resistance and the bending moment resistance are high.

Description

Technical Field

[0001] This utility model relates to a heavy-duty steering wheel, specifically a high-precision heavy-duty steering wheel. Background Technology

[0002] Heavy-duty steering wheels are used in automated logistics and industrial production to carry heavy loads. They are powered by a drive motor and the steering mechanism controls the steering angle of the steering wheel, enabling the AGV to move forward, backward, rotate in place, and move left and right.

[0003] Existing heavy-duty steering wheels suffer from technical bottlenecks in transmission accuracy. Furthermore, existing heavy-duty steering wheel products typically employ involute planetary gear transmission, which inevitably introduces transmission errors, affecting the terminal's travel accuracy. Additionally, their structure has limitations in impact resistance and bending moment resistance. To address these issues, the inventors have improved the structure of the heavy-duty steering wheel and introduced an RV high-precision transmission mechanism. Utility Model Content

[0004] The purpose of this utility model is to provide a high-precision heavy-duty steering wheel. This heavy-duty steering wheel has the advantages of simple structure, reasonable design, approximately 6 times improved precision, low transmission error, high precision, strong impact resistance and bending moment resistance, and solves the problems mentioned in the above technical background.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a high-precision heavy-duty steering wheel, which includes a fixed plate and a transmission system and a steering system mounted on the fixed plate. The transmission system is located on one side of the steering system and includes a wheel and a travel drive motor mounted on one side of the wheel. The output end of the travel drive motor is connected to an RV reducer, and an internal bearing is mounted on the RV reducer. The wheel is mounted on the internal bearing and connected to the RV reducer by bolts. The steering system includes a steering connection flange and a steering drive motor fixed to the lower end face of the steering connection flange. The steering drive motor is vertically arranged, and the output end of the steering drive motor is connected to a spur gear, on which the outer ring of a slewing bearing meshes.

[0006] Preferably, the walking drive motor is horizontally positioned, and the walking drive motor and wheels are distributed at both ends of the fixed plate.

[0007] Preferably, the travel drive motor is fixed to the bottom of the fixed plate, and the flange provides support for the travel drive motor, so that the travel drive motor, RV reducer and internal bearings are all kept stable.

[0008] Preferably, the RV reducer is located at the end of the fixed plate away from the drive motor, and the RV reducer is installed inside the wheel.

[0009] Preferably, the steering connection flange is horizontally arranged and fixed to the end of the fixed plate away from the travel drive motor, so that the structure of the steering connection flange remains stable and the steering connection flange can support the steering drive motor.

[0010] Preferably, the outer ring of the slewing bearing is horizontally arranged, and an inner ring of the slewing bearing is installed on the outer ring of the slewing bearing. The inner ring of the slewing bearing is connected to the fixing plate by bolts.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0012] 1. This utility model provides a high-precision heavy-duty steering wheel, which includes a fixed plate and a transmission system and a steering system mounted on the fixed plate. The overall design is reasonable and the structure is simple. The transmission system includes a wheel and a travel drive motor mounted on one side of the wheel. The output end of the travel drive motor is connected to an RV reducer. An internal bearing is installed on the RV reducer, and the wheel is mounted on the internal bearing. The transmission error of the RV reducer is only 3 arcmin. Under the premise of a wheel diameter of 360mm, the theoretical wheel end travel distance error is about 0.16mm. Compared with the traditional planetary gear structure in the prior art, it can improve the accuracy by about 6 times. The transmission error is low and the accuracy is high. In addition, the transmission system using the RV reducer has much better rigidity than the traditional planetary gear structure, which can meet various high-precision application scenarios.

[0013] 2. The RV reducer in this utility model can withstand an impact load of 5 times the rated torque during its service life, which is higher than the rated torque of 2 times that of the traditional planetary gear structure. This allows the heavy-duty steering wheel to better meet the working conditions such as emergency stop and start, and it has strong impact resistance and bending moment resistance.

[0014] 3. The transmission system in this utility model has a compact structure. Due to the special cycloidal transmission principle of RV, it can achieve a single-stage high-speed ratio, thereby achieving the requirement of miniaturization of the whole machine. Attached Figure Description

[0015] Figure 1 This is the front view of the present invention;

[0016] Figure 2 This is an overall structural diagram of the present invention;

[0017] Figure 3 This utility model Figure 1 Sectional view of AA.

[0018] The reference numerals and names in the figure are as follows: 1. Fixed plate; 2. Transmission system; 21. Wheel; 22. Walking drive motor; 23. RV reducer; 24. Internal bearing; 3. Steering system; 31. Steering connection flange; 32. Steering drive motor; 33. Spur gear; 34. Outer ring of slewing bearing; 35. Inner ring of slewing bearing. Detailed Implementation

[0019] 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.

[0020] In the description of the embodiments of this utility model, it should be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing the embodiments of this utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. 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 indicated technical features. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the embodiments of this utility model, "multiple" means two or more, unless otherwise explicitly specified.

[0021] In this embodiment of the invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this embodiment of the invention according to the specific circumstances.

[0022] Please see Figure 1 The present invention provides an embodiment of a high-precision heavy-duty steering wheel, which includes a fixed plate 1 and a transmission system 2 and a steering system 3 disposed on the fixed plate 1, wherein the transmission system 2 is located on one side of the steering system 3.

[0023] Please see Figure 2 The transmission system 2 includes wheels 21 and a travel drive motor 22 located on one side of the wheels 21. The travel drive motor 22 is horizontally positioned, and the travel drive motor 22 and wheels 21 are distributed at both ends of the fixed plate 1. The output end of the travel drive motor 22 is connected to an RV reducer 23. The transmission error of the RV reducer 23 is only 3 arcmin. Under the premise of a wheel diameter of 360mm, the theoretical wheel end travel distance error is about 0.16mm. Compared with the traditional planetary gear structure in the prior art, it can improve the accuracy by about 6 times and has a low transmission error. In addition, the rigidity of the RV reducer 23 is much better than that of the traditional planetary gear structure. The RV reducer 23 can withstand an impact load of 5 times the rated torque during its service life, which is higher than the 2 times the rated torque of the traditional planetary gear structure, enabling this heavy-duty steering wheel to better meet the needs of emergency stops and starts. Under various operating conditions, it exhibits strong impact resistance and bending moment resistance. The steering system 3 includes a steering connection flange 31 and a steering drive motor 32 fixed to the lower end face of the steering connection flange 31. The steering drive motor 32 is vertically arranged, and its output end is connected to a spur gear 33. A slewing bearing outer ring 34 meshes on the spur gear 33. The steering connection flange 31 is horizontally arranged and fixed to the end of the fixed plate 1 away from the travel drive motor 22, thereby maintaining the stability of the steering connection flange 31 and enabling the steering drive motor 32 to be supported by the steering connection flange 31. The slewing bearing outer ring 34 is horizontally arranged, and a slewing bearing inner ring 35 is installed on the slewing bearing outer ring 34. The slewing bearing inner ring 35 is connected to the fixed plate 1 by bolts.

[0024] Please see Figure 3 An internal bearing 24 is provided on the RV reducer 23. The wheel 21 is mounted on the internal bearing 24 and connected to the RV reducer 23 by bolts. The RV reducer 23 is located at the end of the fixed plate 1 away from the travel drive motor 22 and is installed inside the wheel 21. The travel drive motor 22 is fixed to the bottom of the fixed plate 1. Therefore, the fixed plate 1 plays a supporting role for the travel drive motor 22, so that the travel drive motor 22, the RV reducer 23 and the internal bearing 24 are all stable. The overall structure of the transmission system 2 is compact. Due to the special cycloidal transmission principle of RV, a single-stage high-speed ratio can be achieved, thereby achieving the requirement of miniaturization of the whole machine. The heavy-duty steering wheel uses a cycloidal pinwheel (RV) reducer as the core transmission mechanism. The travel drive motor 22 inputs torque to the RV reducer 23. After the torque is reduced and amplified, it drives the wheel end to output, realizing the function of traction load movement.

[0025] 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 illustrative 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. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A high-precision, heavy-duty steering wheel, characterized in that: It includes a fixed plate (1) and a transmission system (2) and a steering system (3) disposed on the fixed plate (1), wherein the transmission system (2) is located on one side of the steering system (3); The transmission system (2) includes a wheel (21) and a drive motor (22) disposed on one side of the wheel (21). The output end of the drive motor (22) is connected to an RV reducer (23). An internal bearing (24) is disposed on the RV reducer (23). The wheel (21) is mounted on the internal bearing (24) and connected to the RV reducer (23) by bolts. The steering system (3) includes a steering connection flange (31) and a steering drive motor (32) fixed to the lower end face of the steering connection flange (31). The steering drive motor (32) is vertically arranged, and the output end of the steering drive motor (32) is connected to a spur gear (33). The outer ring (34) of the slewing bearing is meshed on the spur gear (33).

2. The high-precision heavy-duty steering wheel according to claim 1, characterized in that: The walking drive motor (22) is horizontally arranged, and the walking drive motor (22) and the wheels (21) are distributed at both ends of the fixed plate (1).

3. The high-precision heavy-duty steering wheel according to claim 1, characterized in that: The walking drive motor (22) is fixed to the bottom of the fixed plate (1).

4. The high-precision heavy-duty steering wheel according to claim 1, characterized in that: The RV reducer (23) is located at one end of the fixed plate (1) away from the walking drive motor (22), and the RV reducer (23) is installed inside the wheel (21).

5. A high-precision heavy-duty steering wheel according to claim 1, characterized in that: The steering connection flange (31) is horizontally positioned and fixed to the end of the fixing plate (1) away from the walking drive motor (22).

6. A high-precision heavy-duty steering wheel according to claim 1, characterized in that: The outer ring (34) of the slewing bearing is horizontally arranged, and the inner ring (35) of the slewing bearing is installed on the outer ring (34). The inner ring (35) of the slewing bearing is connected to the fixing plate (1) by bolts.

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