Device for measuring turning angle and torque of steering wheel and steering wheel

Abstract

The utility model provides a device for measuring the steering angle and torque of a steering wheel and the steering wheel, the device comprises a torque sensor and a steering angle measuring module, the torque sensor is of a double-shaft structure, and an upper rotating shaft and a lower rotating shaft are respectively fixed on an outer ring and an inner ring of the torque sensor to realize torque measurement; the rotation angle measuring module is connected with the upper rotating shaft and used for measuring the rotation angle of the steering wheel. The upper rotating shaft is directly connected with the steering wheel and used for receiving input torque of the steering wheel; the lower rotating shaft is connected with an automobile steering column through a spline and used for transmitting torque to a wheel steering mechanism. The upper rotating shaft, the lower rotating shaft, the torque sensor and the rotating angle measuring module are supported and limited through a base fixed to a vehicle body. According to the utility model, through double-shaft sensing, modular integration and non-contact detection technologies, high-precision and high-reliability dynamic parameter measurement of the steering wheel is realized, and the system is suitable for the core requirements of intelligent driving and vehicle control systems.

Description

TECHNICAL FIELD

[0001] The utility model relates to automatic driving technical field, especially a kind of device and steering wheel for measuring steering wheel rotation angle and torque. BACKGROUND

[0002] In the rapid development of science and technology, automatic driving technology is advancing at an unprecedented pace. In this field, driving robots are gradually emerging and taking on more and more vehicle driving and testing work. Among them, the steering robot as a very core component plays a key role in the entire automatic driving system.

[0003] In most cases, the steering robot is ingeniously installed on the steering wheel to accurately replace manual steering operation. In actual application scenarios, whether it is the rigorous performance testing link of vehicles in the production process or the repeated debugging process in the automatic driving technology development stage, the steering robot can simulate steering actions under various complex road conditions with its accuracy and stability, ensuring the safety and reliability of vehicle travel. For example, in the scene of wet and slippery road under extreme weather conditions, steep mountain road simulation test, etc., manual driving is difficult to achieve highly consistent and accurate steering operation, while the steering robot can stably output standard steering action, providing key data support for vehicle performance evaluation and technology optimization.

[0004] However, as the application range of steering robots continues to expand, the safety of the steering robot becomes increasingly important. To ensure the safe driving of vehicles under various working conditions, accurate detection of the steering angle and torque output by the steering robot has become an indispensable necessary link in the industry. Only through accurate detection can deviations or faults that may occur during the operation of the steering robot be detected in time, and effective measures can be taken to correct them, avoiding serious traffic accidents caused by steering failure and building a solid safety line for the widespread application of automatic driving technology. UTILITY MODEL CONTENT

[0005] To solve the above problems, the utility model aims to provide a device and steering wheel for measuring steering wheel rotation angle and torque, which realizes high-precision and high-reliability dynamic parameter measurement of steering wheel through dual-axis sensing, modular integration and non-contact detection technology, and is suitable for the core needs of intelligent driving and vehicle control system.

[0006] To achieve the above purpose, the technical scheme of the utility model is as follows:

[0007] A device for measuring steering wheel angle and torque includes a torque sensor and an angle measurement module. The torque sensor has a dual-axis structure, with an upper shaft and a lower shaft fixed to the outer and inner rings of the sensor, respectively, to measure torque. The angle measurement module is connected to the upper shaft and measures the rotation angle of the steering wheel. The upper shaft is directly connected to the steering wheel to receive the input torque from the steering wheel. The lower shaft is connected to the vehicle steering column via a spline to transmit torque to the wheel steering mechanism. The upper shaft, lower shaft, torque sensor, and angle measurement module are all supported and limited by a base fixed to the vehicle body.

[0008] Furthermore, the torque sensor is equipped with a slip ring mover and a slip ring stator. The slip ring mover is mounted on the bottom surface of the upper rotating shaft, and the wiring terminal is located on the inner ring of the slip ring mover and connected to the side signal line of the torque sensor. The slip ring stator is mounted on the bottom of the base and is connected to the connector mounted on the side of the base.

[0009] Furthermore, the angle measurement module is a magnetic scale system. The magnetic scale ring of the magnetic scale system is fixed to the upper rotating shaft and rotates synchronously with the steering wheel. The magnetic scale reading head is installed on the stationary base and is connected to a connector installed on the side of the base. The absolute angle is detected by the change of magnetic poles.

[0010] Furthermore, an end cap is pressed and fixed onto the base. The base and end cap are respectively equipped with a first bearing seat and a second bearing seat. The upper and lower rotating shafts are supported within the base and end cap by the first and second bearing seats and the first and second bearings, respectively. Both the base and end cap are provided with a first groove and a second groove. A first rubber sealing ring and a second rubber sealing ring are installed in the first and second grooves to prevent dust / liquid intrusion.

[0011] Furthermore, the base has fixing holes on its side, and is secured to the vehicle body by fitting a double-headed hexagonal steel column, thus restricting the base's rotation.

[0012] To achieve the above objectives, this utility model also provides a steering wheel, including the device for measuring steering wheel angle and torque as described above.

[0013] Beneficial effects: This utility model achieves high-precision and high-reliability measurement of steering wheel dynamic parameters through dual-axis sensing, modular integration and non-contact detection technology, which is suitable for the core needs of intelligent driving and vehicle control systems. Attached Figure Description

[0014] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of the utility model. The illustrative embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an undue limitation of the utility model. In the drawings:

[0015] Figure 1 This is a cross-sectional view of the device for measuring steering wheel angle and torque according to an embodiment of the present invention;

[0016] Figure 2 This is a cross-sectional view of the upper and lower rotating shafts (rotating parts) of the device for measuring steering wheel angle and torque according to an embodiment of the present invention;

[0017] Figure 3 This is a cross-sectional view of the base and end cap (stationary part) of the device for measuring steering wheel angle and torque according to an embodiment of the present invention;

[0018] Figure 4 This is a schematic diagram of the base structure of the device for measuring steering wheel angle and torque according to an embodiment of the present invention. Detailed Implementation

[0019] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0020] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0021] Example 1

[0022] See Figures 1-4 A device for measuring steering wheel angle and torque includes a torque sensor 1 and an angle measurement module 2. The torque sensor 1 has a dual-axis structure, with an upper shaft 3 and a lower shaft 4 fixed to the outer and inner rings of the torque sensor 1, respectively, to achieve torque measurement. The angle measurement module 2 is connected to the upper shaft 3 and is used to measure the rotation angle of the steering wheel 5. The upper shaft 3 is directly connected to the steering wheel 5 and is used to receive the input torque of the steering wheel 5. The lower shaft 4 is connected to the vehicle steering column via a spline 6 and is used to transmit torque to the wheel steering mechanism. The upper shaft 3, lower shaft 4, torque sensor 1, and angle measurement module 2 are all supported and limited by a base 7 fixed to the vehicle body.

[0023] This embodiment utilizes dual-axis sensing, modular integration, and non-contact detection technology to achieve high-precision and high-reliability measurement of steering wheel dynamic parameters, making it suitable for the core requirements of intelligent driving and vehicle control systems.

[0024] In a specific example, the torque sensor 1 is equipped with a slip ring mover 101 and a slip ring stator 102. The slip ring mover 101 is mounted on the bottom surface of the upper rotating shaft 3. The terminal 1011 is located on the inner ring of the slip ring mover 101 and is connected to the side signal line 103 of the torque sensor 1. The slip ring stator 102 is mounted on the bottom of the base 7 and is connected to the connector 10 mounted on the side of the base 7.

[0025] In this embodiment, the torque signal is transmitted to the fixed slip ring stator via the slip ring mover rotating with the upper shaft, and then output through the side connector, thus avoiding the signal line from rotating and tangling.

[0026] In a specific example, the angle measurement module 2 is a magnetic scale system. The magnetic scale magnetic ring 201 of the magnetic scale system is fixed to the upper rotating shaft 3 and rotates synchronously with the steering wheel 5. The magnetic scale reading head 202 is installed on the stationary base 7 and is connected to the connector 10 installed on the side of the base 7. The absolute angle is detected by the change of magnetic poles.

[0027] In this embodiment, the steering angle signal flow is as follows: steering wheel rotation → magnetic scale ring → non-contact detection by the magnetic scale reader → base connector → external ECU.

[0028] In a specific example, an end cap 9 is pressed and fixed on the base 7. The base 7 and the end cap 9 are respectively equipped with a first bearing seat 701 and a second bearing seat 901. The upper rotating shaft 3 and the lower rotating shaft 4 are supported in the base 7 and the end cap 9 by the first bearing seat 701 and the second bearing seat 901 in conjunction with the first bearing 702 and the second bearing 902. The base 7 and the end cap 9 are both provided with a first groove 703 and a second groove 903. A first rubber sealing ring 704 and a second rubber sealing ring 904 are provided in the first groove 703 and the second groove 903 to prevent dust / liquid from entering.

[0029] The dual-bearing housing split support structure of this embodiment reduces frictional losses caused by shaft runout. The separate design of the base and end cover allows for independent adjustment of the preload of the first and second bearings during assembly, avoiding bearing jamming problems caused by accumulated tolerances in a monolithic structure. The dual-groove sealing system of this embodiment improves the equipment's dustproof and water-repellent performance.

[0030] In a specific example, the base 7 has a fixing hole 705 on its side and is fixed to the vehicle body by a double-headed hexagonal steel column 706, which restricts the rotation of the base 7.

[0031] This embodiment achieves highly reliable installation of the device under complex working conditions through mechanical optimization and modular interfaces, meeting the requirements of intelligent driving systems for accurate acquisition of steering parameters.

[0032] In summary, this embodiment addresses the pain points of traditional solutions, such as signal wire entanglement, wear, and poor environmental tolerance, through key technologies like dual-axis sensing, non-contact detection, separate support, and sealed protection. It provides a highly reliable core sensing unit for intelligent driving, and its modular design facilitates vehicle system integration and maintenance.

[0033] Example 2

[0034] To achieve the above objectives, this embodiment also provides a steering wheel, including the device for measuring steering wheel angle and torque as described above.

[0035] The steering wheel of this embodiment has the same advantages over the prior art as the aforementioned device for measuring steering wheel angle and torque, and will not be repeated here.

[0036] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A device for measuring steering wheel angle and torque, characterized in that, The system includes a torque sensor (1) and a steering angle measurement module (2). The torque sensor (1) has a dual-axis structure, with the upper shaft (3) and the lower shaft (4) fixed to the outer and inner rings of the torque sensor (1) respectively to achieve torque measurement. The steering angle measurement module (2) is connected to the upper shaft (3) and is used to measure the rotation angle of the steering wheel (5). The upper shaft (3) is directly connected to the steering wheel (5) and is used to receive the input torque of the steering wheel (5). The lower shaft (4) is connected to the car steering column through a spline (6) and is used to transmit torque to the wheel steering mechanism. The upper shaft (3), the lower shaft (4), the torque sensor (1), and the steering angle measurement module (2) are all supported and limited by a base (7) fixed on the car body.

2. The device for measuring steering wheel angle and torque according to claim 1, characterized in that, The torque sensor (1) is equipped with a slip ring mover (101) and a slip ring stator (102). The slip ring mover (101) is installed on the bottom surface of the upper rotating shaft (3). The terminal (1011) is located on the inner ring of the slip ring mover (101) and is connected to the side signal line (103) of the torque sensor (1). The slip ring stator (102) is installed at the bottom of the base (7) and is connected to the connector (10) installed on the side of the base (7).

3. The device for measuring steering wheel angle and torque according to claim 1, characterized in that, The angle measurement module (2) is a magnetic scale system. The magnetic scale ring (201) of the magnetic scale system is fixed on the upper rotating shaft (3) and rotates synchronously with the steering wheel (5). The magnetic scale reading head (202) is installed on the stationary base (7). The magnetic scale reading head (202) is connected to the connector (10) installed on the side of the base (7) and the absolute angle is detected by the change of magnetic poles.

4. The device for measuring steering wheel angle and torque according to claim 1, characterized in that, An end cap (9) is pressed and fixed on the base (7). The base (7) and the end cap (9) are respectively equipped with a first bearing seat (701) and a second bearing seat (901). The upper rotating shaft (3) and the lower rotating shaft (4) are supported in the base (7) and the end cap (9) by the first bearing seat (701) and the second bearing seat (901) in conjunction with the first bearing (702) and the second bearing (902). The base (7) and the end cap (9) are both provided with a first groove (703) and a second groove (903). A first rubber sealing ring (704) and a second rubber sealing ring (904) are provided in the first groove (703) and the second groove (903) to prevent dust / liquid from entering.

5. The device for measuring steering wheel angle and torque according to claim 1, characterized in that, The base (7) has a fixing hole (705) on its side and is fixed to the vehicle body by a double-headed hexagonal steel column (706) to restrict the rotation of the base (7).

6. A steering wheel, characterized in that, Includes the apparatus for measuring steering wheel angle and torque as described in any one of claims 1 to 5.

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