Steering column transmission shaft assembly with error-proof structure and vehicle steering system
Patent Information
- Application Number
- CN202522106016.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-30
- Publication Date
- 2026-09-18
- Estimated Expiration
- 2035-09-30
AI Technical Summary
但在实际安装连接时，转向传动轴和万向节叉未安装到位，螺栓仅与转向管柱传动轴下端花键连接，，转向传动轴和万向节叉仍能安装，由于缺少轴向限位，在使用过程中会松脱导致车辆失去转向，严重威胁行车安全
[0009]The advantages and technical effects of this utility model are as follows: By adopting the above technical solution and adding an anti-misalignment boss on the steering column drive shaft, the risk of loosening that may be caused by the steering column drive shaft and universal joint fork not being fully installed is solved, thereby realizing proactive prevention and reliable control of assembly quality, and greatly improving the inherent reliability of the steering system and the driving safety of the whole vehicle.
Smart Images
Figure CN224766820U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of vehicle technology, and in particular relates to a steering column drive shaft assembly with a fault-prevention structure and a vehicle steering system. Background Technology
[0002] The steering column driveshaft transmits power between two shafts whose relative positions change continuously during operation via a universal joint. Two splines are located at the connecting end of the steering driveshaft, with a semi-circular groove between them. The connecting section of the steering driveshaft is inserted into the groove of the universal joint fork, and a fastening connection is achieved through the fit between the bolts and the groove. However, in actual installation, if the steering driveshaft and universal joint fork are not properly installed, and the bolts only connect to the lower spline of the steering column driveshaft, the steering driveshaft and universal joint fork can still be installed. Due to the lack of axial restraint, they may loosen during use, causing the vehicle to lose steering and seriously threatening driving safety. Summary of the Invention
[0003] To address the problems existing in the prior art, this utility model provides a steering column drive shaft assembly with a fault-prevention structure and a vehicle steering system, which solves the risk of loosening that may be caused by the steering column drive shaft and universal joint fork not being fully installed, thereby achieving proactive prevention and reliable control of assembly quality.
[0004] This utility model is implemented as follows: a steering column drive shaft assembly with an anti-misalignment structure includes a steering drive shaft and a universal joint. The connecting end of the steering drive shaft is provided with a spline section and is fastened to the universal joint by bolts. The lower end face of the connecting end of the steering drive shaft is provided with an anti-misalignment boss. The anti-misalignment boss is configured to prevent the bolt from passing through and to tighten when the connecting end of the steering drive shaft is not installed to the preset position of the universal joint fork slot.
[0005] Furthermore, the distance between the anti-misalignment boss end face near the bolt mounting side and the centerline of the steering drive shaft is greater than the distance between the bolt fastening end face and the centerline of the steering drive shaft.
[0006] Furthermore, the radial dimension of the anti-misalignment boss is smaller than the diameter of the universal joint fork slot.
[0007] Furthermore, the axial length of the anti-misalignment boss is greater than the length of the lower spline, and the axial length of the anti-misalignment boss is less than the distance between the upper end face of the second universal joint fork and the end face of the slot of the first universal joint fork.
[0008] On the other hand, a vehicle steering system is provided that employs any of the steering column driveshaft assemblies described above.
[0009] The advantages and technical effects of this utility model are as follows: By adopting the above technical solution and adding an anti-misalignment boss on the steering column drive shaft, the risk of loosening that may be caused by the steering column drive shaft and universal joint fork not being fully installed is solved, thereby realizing proactive prevention and reliable control of assembly quality, and greatly improving the inherent reliability of the steering system and the driving safety of the whole vehicle. Attached Figure Description
[0010] Figure 1 This is a three-dimensional view of the overall structure provided in an embodiment of the present utility model.
[0011] Figure 2 This is a schematic diagram of the connection between the steering drive shaft and the universal joint fork provided in an embodiment of this utility model.
[0012] Figure 3 This is a schematic diagram showing the positional relationship between the anti-misalignment boss and the bolt provided in this embodiment of the utility model. In the diagram: 1. Steering drive shaft; 1-1. Lower spline; 2. Universal joint; 2-1. First universal joint fork; 2-1. Second universal joint fork; 2-3. Groove; 3. Bolt; 4. Anti-misalignment boss. Detailed Implementation
[0013] To make the objectives, technical solutions, and advantages of this utility model clearer, the following detailed description is provided in conjunction with embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this utility model.
[0014] It should be noted that the terms "upper", "lower", "left", "right", "top", "bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and 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. Therefore, they should not be construed as limitations on this utility model.
[0015] like Figure 1 and Figure 2 As shown, this application provides a steering column drive shaft assembly with a fault-prevention structure, including a steering drive shaft 1 and a universal joint 2. The connecting end of the steering drive shaft 1 is provided with a spline section and is fastened to the universal joint 2 by bolts 3. The lower end face of the connecting end of the steering drive shaft 1 is provided with a fault-prevention boss 4. The fault-prevention boss 4 is configured to prevent the bolts 3 from passing through and fastening when the connecting end of the steering drive shaft 1 is not installed to the preset position of the universal joint fork slot 2-3.
[0016] like Figure 3As shown, the distance r between the end face of the anti-misalignment boss 4 near the mounting side of bolt 3 and the centerline of the steering drive shaft 1 is greater than the distance d between the fastening end face of bolt 3 and the centerline of the steering drive shaft 1. This ensures that bolt 3 cannot be installed when the connecting end of the steering drive shaft 1 is not properly installed, as it is blocked by the anti-misalignment boss 4.
[0017] The radial dimension of the anti-misalignment boss 4 is smaller than the diameter of the universal joint 2 fork slot 2-3. This ensures that it does not affect the normal installation of the universal joint 2 fork.
[0018] The axial length L of the anti-misalignment boss 4 is greater than the length of the lower spline 1-1, such as... Figure 2 As shown, the axial length L of the anti-misalignment boss 4 is less than the distance D between the upper end face of the second universal joint fork 2-2 and the end face of the groove 2-3 of the first universal joint fork 2-1. This ensures that the anti-misalignment boss 4 does not affect the normal use of the universal joint fork 2.
[0019] On the other hand, a vehicle steering system is provided that employs any of the steering column driveshaft assemblies described above.
[0020] By adding a misalignment prevention boss 4 to the steering column drive shaft, the risk of loosening that may occur when the steering column drive shaft and universal joint 2 fork are not fully installed is resolved. This achieves proactive prevention and reliable control of assembly quality, greatly improving the inherent reliability of the steering system and the driving safety of the entire vehicle.
[0021] 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 and improvements 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 steering column transmission shaft assembly with an error-proof structure, comprising a steering transmission shaft and a universal joint, a connecting end of the steering transmission shaft is provided with a spline section and is fastened to the universal joint by a bolt, characterized in that, The lower end face of the connecting end of the steering drive shaft is provided with an anti-misalignment boss. The anti-misalignment boss is configured to prevent the bolt from passing through and tightening when the connecting end of the steering drive shaft is not installed to the preset position of the universal joint fork slot.
2. The steering column shaft assembly with error-proof structure according to claim 1, characterized in that, The distance between the anti-misalignment boss end face near the bolt mounting side and the centerline of the steering drive shaft is greater than the distance between the bolt fastening end face and the centerline of the steering drive shaft.
3. The steering column shaft assembly with error-proofing structure of claim 1, wherein, The radial dimension of the anti-misalignment boss is smaller than the diameter of the universal joint fork slot.
4. The steering column shaft assembly with error proofing structure of claim 1, wherein, The axial length of the anti-misalignment boss is greater than the length of the lower spline, and the axial length of the anti-misalignment boss is less than the distance between the upper end face of the second universal joint fork and the end face of the groove of the first universal joint fork.
5. A vehicle steering system characterized by, The steering column drive shaft assembly described in any one of claims 1 to 4 is adopted.