Front symmetrical torsion spring structure for automobile C-EPS
By adopting a front-mounted symmetrical torsion spring structure in the C-EPS electric power steering system, the problem of uneven support force is solved, achieving smoothness and extended life of the steering system, and possessing high fatigue limit and toughness.
Patent Information
- Application Number
- CN202520139066.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-21
- Publication Date
- 2026-02-24
- Estimated Expiration
- 2035-01-21
AI Technical Summary
In existing C-EPS electric power steering systems, the uneven force exerted on the column support by single-sided and double-sided tension springs leads to uneven adjustment angles, affecting the smoothness and lifespan of the four-way adjustable steering system.
The structure adopts a front-mounted symmetrical torsion spring. By bending and fixing the two ends of the torsion spring on the sheet metal part, and combining it with the cam and thrust roller bearing, the pre-tensioning and relaxation of the torsion spring can be realized, ensuring that the force is applied to the center of the bracket, and adjusting the spring force with the sheet metal part.
It improves the smoothness and stability of the steering system during four-way adjustment, extends the system's lifespan, and has high fatigue limit and toughness, enabling it to resist long-term vibration and impact loads.
Smart Images
Figure CN223934788U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of automotive parts technology, and in particular to a front-mounted symmetrical torsion spring structure for automotive C-EPS. Background Technology
[0002] In recent years, most C-EPS electric power steering systems have used single-sided and double-sided tension springs to adjust the column support. When adjusting the direction of the column using this structure, the spring force acts at different positions on the support, resulting in the spring tension and compression forces not being effectively applied to the center of the column. Consequently, when the driver adjusts the direction of the electric power steering column, the spring force at the support is not applied to the center of the column, affecting the adjustment angle and impacting the smoothness of the four-way adjustable steering system during angle adjustment. Therefore, using a symmetrical torsion spring in a four-way adjustable steering system can effectively optimize the column adjustment system. Thus, a front-mounted symmetrical torsion spring structure for automotive C-EPS is proposed to solve this problem. Utility Model Content
[0003] The purpose of this invention is to provide a front-mounted symmetrical torsion spring structure for automotive C-EPS, which enables the steering system to be more stable and smooth during four-way adjustment and improves the fatigue limit.
[0004] The above-mentioned technical objective of this utility model is achieved through the following technical solution: a front-mounted symmetrical torsion spring structure for automotive C-EPS, comprising a column assembly, a connecting rod inserted into the column assembly, a handle assembly, a thrust roller bearing and a sheet metal part one mounted from top to bottom on the outside of the connecting rod, a sheet metal part two mounted on the upper end of the outside of the connecting rod, a bracket portion and a torsion spring mounted through the bracket portion on the left side of the outer wall of the column assembly, and the two ends of the torsion spring being respectively installed in the holes of sheet metal part one and sheet metal part two.
[0005] By adopting the above technical solution, a symmetrical torsion spring is mounted on a four-way adjustable column. When the handle assembly is in the locked state, the symmetrical torsion spring is in a stretched state, and at this time, the symmetrical torsion spring is in a pre-tensioned state towards the bracket. When it is necessary to adjust the steering system angle, after the handle assembly is opened upwards, it returns to its lowest position due to the tension of the symmetrical torsion spring. At this time, the upper steering shaft of the steering system is at its highest position, and the torsion spring is in a relaxed state. When adjusting downwards, the elasticity of the symmetrical torsion spring controls the adjustment. During the steering system angle adjustment process, if the spring tension feels too high or too low, it can be adjusted by... Figure 3The side view shows sheet metal parts used to adjust the spring force, which can optimize the angle adjustment. The symmetrical torsion spring structure in the four-way adjustable electric power steering system can make the steering system more stable and smooth during four-way adjustment. The symmetrical torsion spring design is used because torsion springs have a high fatigue limit and the ability to resist fatigue failure under long-term vibration and alternating stress. They also have sufficient plasticity and toughness to meet the needs of processing and forming and to withstand certain impact loads. Therefore, the use of torsion springs can increase the life of the steering system angle adjustment device. Hence, the symmetrical torsion spring design is adopted.
[0006] A further feature of this invention is that the two ends of the torsion spring are bent and fixed to the sheet metal part.
[0007] A further feature of this invention is that a cam is provided on the connecting rod, the cam is located above the handle assembly, and both ends of the connecting rod are installed on the column assembly by hexagonal nuts.
[0008] By adopting the above technical solution, the rotation of the handle assembly becomes more flexible and stable with the cooperation of the cam and the thrust roller bearing, thereby driving the torsion spring to achieve pre-tension and relaxation states.
[0009] A further feature of this invention is that the bracket portion includes a sheet metal part three located on the left side of the column assembly, and a sheet metal part four is mounted on the left side of the sheet metal part three.
[0010] A further feature of this invention is that the sheet metal part three is fixed by an M nut, and the sheet metal part four is fixed by a lock nut and an M bolt.
[0011] By adopting the above technical solution, sheet metal parts three and four are installed stably, and the torsion spring is stably installed on the column assembly.
[0012] The beneficial effects of this utility model are:
[0013] 1. In this utility model, the force of the symmetrical torsion spring acts on the center of the support, so the column is subjected to uniform force and the adjustment is smoother.
[0014] 2. The symmetrical torsion spring of this utility model has good plasticity and toughness, and has the ability to resist deformation and damage under long-term vibration conditions, so it has a long service life. Using this structure can improve the service life of the steering system angle adjustment device.
[0015] 3. With this structure, the tension of the symmetrical torsion spring can be adjusted through the oval hole in the sheet metal part, thereby controlling the magnitude of the tension force during the angle adjustment of the steering system. Attached Figure Description
[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0017] Figure 1 This is an exploded view of the overall structure of a front-mounted symmetrical torsion spring structure for automotive C-EPS.
[0018] Figure 2 This is a utility model Figure 1 Assembly structure diagram.
[0019] Figure 3 This is a utility model Figure 2 Side view.
[0020] In the diagram, 2 is sheet metal part one; 3 is thrust roller bearing; 4 is handle assembly; 5 is cam; 6 is column assembly; 7 is connecting rod; 8 is sheet metal part two; 9 is hex nut; 10 is M6 nut; 11 is sheet metal part three; 12 is torsion spring; 13 is sheet metal part four; 14 is lock nut; and 15 is M4 bolt. Detailed Implementation
[0021] The technical solution of this utility model will now be clearly and completely described with reference to specific embodiments. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.
[0022] like Figures 1-3 As shown, a front-mounted symmetrical torsion spring structure for automotive C-EPS includes a column assembly 6, a connecting rod 7 inserted into the column assembly 6, a handle assembly 4, a thrust roller bearing 3 and a sheet metal part 2 mounted from top to bottom on the outside of the connecting rod 7, a sheet metal part 8 mounted on the upper end of the outside of the connecting rod 7, a bracket portion and a torsion spring 12 mounted through the bracket portion are mounted on the left side of the outer wall of the column assembly 6, and the two ends of the torsion spring 12 are respectively installed in the holes of the sheet metal part 2 and the sheet metal part 8.
[0023] Furthermore, the two ends of the torsion spring 12 are bent and fixed to the sheet metal part.
[0024] Furthermore, a cam 5 is also provided on the connecting rod 7, the cam 5 is located above the handle assembly 4, and both ends of the connecting rod 7 are installed on the column assembly 6 by hexagonal nuts 9.
[0025] Furthermore, the bracket portion includes a sheet metal part three 11 located on the left side of the column assembly 6, and a sheet metal part four 13 is mounted on the left side of the sheet metal part three 11.
[0026] Furthermore, the sheet metal part three 11 is installed and fixed by an M6 nut 10, and the sheet metal part four 13 is installed and fixed by a lock nut 14 and an M4 bolt 15.
[0027] The working principle of this invention is as follows: A symmetrical torsion spring is mounted on a four-way adjustable column. When the handle assembly is locked, the symmetrical torsion spring is stretched, and the spring is pre-tensioned against the bracket. When the steering system angle needs to be adjusted, the handle assembly is opened upwards. Due to the spring's tension, it returns to its lowest position, and the upper steering shaft of the steering system is at its highest point. At this time, the torsion spring is relaxed. When adjusting downwards, the spring force of the symmetrical torsion spring controls the adjustment. If the spring tension feels too high or too low during the steering system angle adjustment process, it can be adjusted by... Figure 2 The side view shows sheet metal parts used to adjust the spring force, which can optimize the angle adjustment.
Claims
1. A front-mounted symmetrical torsion spring structure for automotive C-EPS, comprising a column assembly (6), characterized in that: A connecting rod (7) is inserted into the column assembly (6). A handle assembly (4), a thrust roller bearing (3), and a sheet metal part (2) are installed on the outside of the connecting rod (7) from top to bottom. A sheet metal part (8) is installed on the upper end of the outside of the connecting rod (7). A bracket part and a torsion spring (12) are installed on the left side of the outer wall of the column assembly (6). The two ends of the torsion spring (12) are respectively installed in the holes of the sheet metal part (2) and the sheet metal part (8).
2. The front-mounted symmetrical torsion spring structure for automotive C-EPS according to claim 1, characterized in that: The two ends of the torsion spring (12) are bent and fixed to the sheet metal part.
3. The front-mounted symmetrical torsion spring structure for automotive C-EPS according to claim 1, characterized in that: The connecting rod (7) is also provided with a cam (5), which is located above the handle assembly (4). The two ends of the connecting rod (7) are installed on the column assembly (6) by hexagonal nuts (9).
4. The front-mounted symmetrical torsion spring structure for automotive C-EPS according to claim 1, characterized in that: The bracket portion includes a sheet metal part three (11) located on the left side of the column assembly (6), and a sheet metal part four (13) is mounted on the left side of the sheet metal part three (11).
5. A front-mounted symmetrical torsion spring structure for automotive C-EPS according to claim 4, characterized in that: The sheet metal part three (11) is installed and fixed by an M6 nut (10), and the sheet metal part four (13) is installed and fixed by a lock nut (14) and an M4 bolt (15).