A large-stiffness small-angle electric power steering gear

Abstract

The utility model discloses a big rigidity small angle electric power steering gear, containing the steering gear body, the steering gear body on be equipped with input shaft and output shaft, input shaft and output shaft between be equipped with torsion bar, the inside of output shaft be equipped with limit butterfly groove, the groove angle of limit butterfly groove be 2.5 DEG. The rigidity of torsion bar be 12.5. Because the rigidity of torsion bar is promoted to 12.5 from current 6, makes the deformation of torsion bar less under the same torque input condition of input shaft, and the small angle or torque change of driver input can be detected by torque sensor more quickly, thereby prompting motor to intervene and provide help or resistance earlier, and the torque measurement accuracy and control accuracy are improved, and the working of torque sensor under extreme working condition is provided with better guarantee, and the system stability, safety and reliability are enhanced simultaneously.

Description

Technical Field

[0001] This utility model relates to a steering gear, or more precisely, a high-rigidity, low-angle electric steering gear. Background Technology

[0002] Existing electric power steering systems have problems such as insufficient rigidity or excessive angle when applied to special vehicles. When the torsion bar is subjected to the large load of special vehicles, it may deform excessively, resulting in vague steering feel, poor positioning accuracy, or even component damage. Utility Model Content

[0003] Therefore, it is necessary to provide a high-rigidity, low-angle electric steering system to address the aforementioned technical problems.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0005] A high-rigidity, low-angle electric steering gear is characterized in that the high-rigidity, low-angle electric steering gear includes a steering gear body, an input shaft and an output shaft are provided on the steering gear body, a torsion bar is provided between the input shaft and the output shaft, and a limiting butterfly groove is provided inside the output shaft, the groove angle of the limiting butterfly groove is 2.5°.

[0006] In a preferred embodiment of this utility model, the input shaft, output shaft, and torsion bar are coaxially arranged.

[0007] In a preferred embodiment of this utility model, the end of the input shaft has a flat rectangular structure.

[0008] In a preferred embodiment of this utility model, the stiffness of the torsion bar is 12.5.

[0009] Compared with the prior art, the present invention has the following beneficial effects:

[0010] This invention provides a high-rigidity, low-angle electric power steering system. By increasing the stiffness of the torsion bar from 6 to 12.5, the deformation of the torsion bar on the input shaft is reduced under the same torque input. This allows the torque sensor to detect minute angle or torque changes input by the driver more quickly, prompting the motor to intervene earlier to provide assistance or resistance. Simultaneously, it improves torque measurement and control accuracy, providing better protection for the torque sensor under extreme conditions. Both aspects enhance system stability, safety, and reliability. Furthermore, the steering system reduces the groove angle of the existing limit butterfly groove from 5° to 2.5°, effectively preventing plastic deformation / failure of the torsion bar and protecting core components. Attached Figure Description

[0011] To more clearly illustrate the solutions in this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0012] Figure 1 This is a structural schematic diagram of the high-rigidity, small-angle electric steering system of this utility model.

[0013] Figure 2 for Figure 1 A cross-sectional view of the electric steering unit along line AA;

[0014] Figure 3 for Figure 1 A schematic diagram of the end structure of the input shaft of the electric steering system;

[0015] Figure 4 A schematic diagram of the limiting butterfly groove of an existing electric steering system;

[0016] The markings in the diagram are explained as follows: 10, steering gear body; 20, input shaft; 30, output shaft; 31, limit butterfly groove; 40, torsion bar. Detailed Implementation

[0017] To enable those skilled in the art to better understand the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0018] The high-rigidity, low-angle electric steering gear includes a steering gear body 10, on which an input shaft 20 and an output shaft 30 are provided. A torsion bar 40 is provided between the input shaft 20 and the output shaft 30. The output shaft 30 has a limiting butterfly groove 31 inside, and the groove angle of the limiting butterfly groove 31 is 2.5°.

[0019] It should be noted that the input shaft 20, output shaft 30, and torsion bar 40 are coaxially arranged.

[0020] In addition, the end of the input shaft 20 has a flat rectangular structure.

[0021] In addition, the stiffness of the torsion bar 40 is 12.5.

[0022] The following is a further explanation of this high-rigidity, low-angle electric steering system.

[0023] Because the stiffness of the torsion bar 40 is increased from the existing 6 to 12.5, the input shaft 20 deforms less under the same torque input. The small angle or torque changes input by the driver can be detected by the torque sensor more quickly, thereby prompting the motor to intervene earlier to provide assistance or resistance. At the same time, the torque measurement accuracy and control accuracy are improved, and the torque sensor is better guaranteed to work under extreme conditions. Both of these factors enhance the system's stability, safety and reliability.

[0024] In addition, the high-rigidity, small-angle electric steering system changes the groove angle of the existing limit butterfly groove from 5° to 2.5°, which can effectively prevent plastic deformation / failure of the torsion bar 40 and protect the core components.

[0025] Obviously, the embodiments described above are only some embodiments of this application, and not all embodiments. The accompanying drawings show preferred embodiments of this application, but do not limit the patent scope of this application.

Claims

1. A high-rigidity, small-angle electric steering system, characterized in that, The high-rigidity, small-angle electric steering gear includes a steering gear body (10), an input shaft (20) and an output shaft (30) are provided on the steering gear body (10), a torsion bar (40) is provided between the input shaft (20) and the output shaft (30), and a limiting butterfly groove (31) is provided inside the output shaft (30), with the groove angle of the limiting butterfly groove (31) being 2.5°.

2. The high-rigidity, small-angle electric steering gear according to claim 1, characterized in that, The input shaft (20), output shaft (30) and torsion bar (40) are coaxially arranged.

3. The high-rigidity, small-angle electric steering gear according to claim 1, characterized in that, The end of the input shaft (20) is a flat rectangular structure.

4. The high-rigidity, small-angle electric steering gear according to claim 1, characterized in that, The stiffness of the torsion bar (40) is 12.5.

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