Improved torque sensor clock spring output end welding structure
By designing the improved torque sensor clock spring output welding structure, and using the U-shaped structure and limit structure to fix the clock spring, the problem of the welding area being susceptible to external forces is solved, and the welding efficiency and stable transmission of torque signals are improved.
Patent Information
- Application Number
- CN202421477500.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-26
- Publication Date
- 2025-06-10
- Estimated Expiration
- 2034-06-26
AI Technical Summary
During the production process of torque sensors, the welding area of the clock spring and the output connector is vulnerable to external stress due to mismatch in texture and weight, resulting in potential damage and poor torque signal transmission, which in turn causes functional failure of the automobile steering system.
An improved torque sensor clock spring output welding structure is designed. The clock spring is bent 180° in the horizontal direction and has a U-shaped structure, covering one side of the torque sensor output connector, and connected to the output pin through laser welding, and adding an upper and lower end limit structure to fix the clock spring.
It significantly reduces the risk of external stress in the welding area during production and assembly and use, improves the convenience and efficiency of the welding process, reduces the risk of bending, deformation and fracture in the welding area, and ensures the stable transmission of torque signals.
Smart Images
Figure CN222966467U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of steering systems, and specifically to an improved welding structure for the output end of a torque sensor clock spring. Background Art
[0002] During the production process of a torque sensor, the clock spring inside the sensor needs to be welded to the output end connector of the sensor. Since the clock spring itself is relatively thin and light, while the output end connector of the sensor is large in volume and heavy in mass, after the welding process is completed, the welding area is the weakest point of the overall mechanical connection. It is extremely vulnerable to external stress during the subsequent sensor assembly process, causing potential damage; and the welding area is also an important path for the transmission of the torque signal of the sensor, and its damage may cause poor transmission of the torque signal, ultimately leading to functional failures of the vehicle steering system and threatening the safety of the driver's life. Summary of the Invention
[0003] The utility model aims to overcome the deficiencies of the prior art and provides an improved welding structure for the output end of a torque sensor clock spring, which greatly reduces the risk of the welding area being affected by external stress during the production and assembly process and during use, and also makes the welding process more convenient and efficient.
[0004] To achieve the above object, an improved welding structure for the output end of a torque sensor clock spring is designed, including a clock spring, a torque sensor output end connector, and a torque sensor rotor. It is characterized in that: the front surface of the torque sensor output end connector is provided with output end Pin pins, one end of the clock spring is connected to the torque sensor rotor, the other end of the clock spring is connected to the output end Pin pins of the torque sensor output end connector, and the other end of the clock spring is in a U-shaped structure and wraps around one side of the torque sensor output end connector.
[0005] The other end of the clock spring is bent 180° in the horizontal direction to form a U-shaped structure. One side of the U-shaped structure is attached to the back surface of the torque sensor output end connector, and the other side of the U-shaped structure is connected to the output end Pin pins of the torque sensor output end connector.
[0006] A transmission line is provided at the end of the other end of the clock spring, and the transmission line is connected to the output end Pin pins of the torque sensor output end connector by laser welding.
[0007] An upper limit structure and a lower limit structure are provided on the side of the torque sensor output end connector, and the upper limit structure and the lower limit structure are respectively stuck on the upper and lower sides of the bending part of the U-shaped structure of the clock spring.
[0008] Compared with the prior art, the present utility model provides an improved welding structure for the output end of the clock spring of the torque sensor, which greatly reduces the risk of the welding area being affected by external stress during the production and assembly process and the use process, and also makes the welding process more convenient and efficient. BRIEF DESCRIPTION OF THE DRAWINGS
[0009] Figure 1 FIG. 6 is a schematic structural diagram of a torque sensor for a traditional automotive electric power steering system.
[0010] Figure 2 FIG. 10 is a schematic block diagram of a torque sensor with dual-channel redundancy.
[0011] Figure 3 FIG. 14 is a schematic structural diagram of the welding structure of a traditional clock spring and the output end connector of a torque sensor.
[0012] Figure 4 FIG. 18 is a front schematic diagram of the welding structure of the clock spring and the output end connector of the torque sensor of the present utility model.
[0013] Figure 5 FIG. 22 is a back schematic diagram of the welding structure of the clock spring and the output end connector of the torque sensor of the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0014] The present utility model will be further described below with reference to the accompanying drawings.
[0015] As shown in FIG. Figure 1 32, FIG. 32 is a schematic structural diagram of a torque sensor for a traditional automotive electric power steering system. One end of the traditional clock spring 3 is connected to the torque sensor rotor, and the other end of the traditional clock spring 3 is connected to the traditional torque sensor output end connector 6.
[0016] As shown in FIG. Figure 2 37, the magnet used in conjunction with the sensor rotates by itself, causing a change in the magnetic field near the magnetoresistive element (MR). This change causes a change in the resistance value of the MR, and further causes a change in the voltage output signal of the Wheatstone bridge where the MR is located. By analyzing and calculating this voltage signal, the angle signal of the magnet rotation can be obtained, and finally the torque signal can be obtained based on the stiffness coefficient of the torsion bar used in the steering system.
[0017] Among them, the two ends of the transmission line of the traditional clock spring 3 are respectively connected to the metal Pin pin connector of the torque signal detection and processing module and the traditional torque sensor output end connector 6, and play the role of wire connection to transmit the torque signal to the sensor output end.
[0018] As shown in FIG. Figure 3As shown, in the traditional structure, the transmission line of the traditional clock spring 3 is connected to the metal pin of the traditional torque sensor output connector 6 by resistance welding. In the subsequent installation process, the entire structure will be placed together in the sensor housing.
[0019] First, because the clock spring is soft and light, it is easy to Figure 3 As shown, there is movement and displacement in the vertical direction, and the traditional torque sensor output connector 6 is relatively heavy, which makes the design of the tooling fixture in this area difficult, and it is difficult to ensure the relative stillness of the traditional clock spring 3 and the traditional torque sensor output connector 6 during resistance welding, thereby increasing the welding failure rate of this workstation; secondly, in the subsequent installation process, when the entire structure is placed in the sensor housing, the tape of the traditional clock spring 3 and the traditional torque sensor output connector 6 will have a certain degree of support, which can easily cause the relatively weak resistance welding area in the middle to be stressed in the vertical direction, with the risk of bending or deformation, and even direct fracture in severe cases.
[0020] like Figure 4 and Figure 5 As shown, in the new design, the combination method of the clock spring 7 and the torque sensor output connector 8 is optimized. First, the clock spring 7 is bent 180 degrees in the horizontal direction, and then one side of the clock spring 7 is connected to the metal pin of the torque sensor output connector 8 by laser welding; the other side is directly fitted to the back of the torque sensor output connector 8. In the subsequent installation process, the way the overall welding structure is placed in the sensor housing is also changed from the previous vertical direction to the horizontal direction.
[0021] An output pin is provided on the front of the torque sensor output connector 8, one end of the clock spring 7 is connected to the torque sensor rotor 4, the other end of the clock spring 7 is connected to the output pin of the torque sensor output connector 8, and the other end of the clock spring 7 is in a U-shaped structure and is covered on one side of the torque sensor output connector 8.
[0022] The other end of the clock spring 7 is bent 180° in the horizontal direction to form a U-shaped structure 7-1, one side of the U-shaped structure 7-1 is in contact with the back of the torque sensor output connector 8, and the other side of the U-shaped structure 7-1 is connected to the output pin of the torque sensor output connector 8.
[0023] A transmission line 7 - 2 is provided at the other end of the clock spring 7 , and the transmission line 7 - 2 is connected to the output pin of the torque sensor output connector 8 by laser welding.
[0024] On the side of the connector 8 at the output end of the torque sensor, there are an upper limit structure 8-1 and a lower limit structure 8-2, and the upper limit structure 8-1 and the lower limit structure 8-2 are respectively stuck on the upper and lower sides of the bending part of the U-shaped structure 7-1 of the clock spring 7.
[0025] First of all, the structure of the connector 8 at the output end of the torque sensor in the new design additionally adds an upper limit structure 8-1 and a lower limit structure 8-2 for fixing the relatively thin and light clock spring 7, so that during the welding of the clock spring 7 and the pin of the connector 8 at the output end of the torque sensor, the position of the winding tape of the clock spring 7 can be better fixed, reducing the difficulty of the production line tooling design, improving the reliability, and also significantly improving the welding qualification rate; Secondly, due to the addition of the upper and lower limit structures, the new structure of the connector 8 at the output end of the torque sensor provides corresponding support for the clock spring 7 in the vertical direction, greatly reducing the force on the relatively weak welding area in this direction, and effectively avoiding the risks of bending, deformation or even fracture; Thirdly, after replacing the connector 8 at the output end of the torque sensor with the new design, the installation direction into the sensor housing can be changed from vertical to horizontal, which is more conducive to the optimization of the production line equipment structure, improving the production rhythm and production efficiency.
[0026] At present, this structural optimization has been successfully applied to the production and manufacturing of torque sensors, and the actual effect meets the expectations.
Claims
1. An improved torque sensor clock spring output end welding structure, comprising a clock spring, a torque sensor output end connector, and a torque sensor rotor, characterized in that: An output pin is provided on the front of the torque sensor output connector (8), one end of the clock spring (7) is connected to the torque sensor rotor (4), the other end of the clock spring (7) is connected to the output pin of the torque sensor output connector (8), and the other end of the clock spring (7) is in a U-shaped structure and is covered on one side of the torque sensor output connector (8).
2. The improved torque sensor clock spring output end welding structure according to claim 1, characterized in that: The other end of the clock spring (7) is bent 180 degrees in the horizontal direction to form a U-shaped structure (7-1), one side of the U-shaped structure (7-1) is in contact with the back of the torque sensor output connector (8), and the other side of the U-shaped structure (7-1) is connected to the output pin of the torque sensor output connector (8).
3. An improved torque sensor clock spring output end welding structure according to claim 1 or 2, characterized in that: A transmission line (7-2) is provided at the other end of the clock spring (7), and the transmission line (7-2) is connected to the output end pin of the torque sensor output end connector (8) by laser welding.
4. The improved torque sensor clock spring output end welding structure according to claim 1, characterized in that: An upper end limit structure (8-1) and a lower end limit structure (8-2) are provided on the side of the connector (8) at the output end of the torque sensor, and the upper end limit structure (8-1) and the lower end limit structure (8-2) are respectively clamped on the upper and lower sides of the bending part of the U-shaped structure (7-1) of the clock spring (7).