Double-end spline self-centering torsion bar for automobile steering system
By adopting an automatic guide column centering and oil reservoir lubrication design in the automotive steering system, the centering difficulties and wear problems during torsion bar press-fitting are solved, achieving stable press-fitting and extending service life, improving system reliability and reducing production costs.
Patent Information
- Application Number
- CN202520749975.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-21
- Publication Date
- 2026-02-13
- Estimated Expiration
- 2035-04-21
AI Technical Summary
In existing automotive steering systems, double-headed spline torsion bars are difficult to center during press-fitting, and the press-fitting force is unstable, which can easily lead to bending or breakage of the torsion bar. In addition, the lack of lubrication function results in severe wear, which reduces the reliability and stability of the system.
Design a double-headed spline self-centering torsion bar. It adopts automatic centering with guide columns, and sets up oil reservoirs and oil grooves to achieve stable pressing and lubrication of the connection parts. Automatic centering with guide columns prevents the torsion bar from bending or breaking, and lubricates the connection parts after pressing.
It achieves stable centering during press-fitting, avoids bending or breakage of the torsion bar, extends service life, reduces production costs, and improves system reliability and stability by reducing wear through lubrication.
Smart Images
Figure CN223905114U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to the technical field of automobile parts, and relates to a double-end spline self-centering torsion bar for an automobile steering system. BACKGROUND
[0002] A torsion bar is usually used in an automobile steering system to transmit the torque of a steering wheel to a steering gear.
[0003] The existing torsion bar connection mode is a double-end spline structure, that is, the two ends of the torsion bar are connected to the input shaft and the output shaft in interference fit through splines. However, this double-end spline torsion bar has the problems of difficult centering and unstable pressing force during pressing. Since the force position of the torsion bar is far away from the pressing position of the spline, the torsion bar is more likely to bend or break during pressing, resulting in a high scrap rate, increased production cost, and no lubrication function. After the spline is pressed in, the connection part cannot be lubricated, and the spline surface is severely worn during long-term use, thereby shortening the service life of the torsion bar and reducing the reliability and stability of the automobile steering system. SUMMARY
[0004] The utility model discloses a kind of double-end spline self-centering torsion bars for automobile steering system, can utilize guide column automatic centering when pressing in input shaft and gear, pressing force is more stable, effectively avoid the situation that torsion bar bends or breaks and is scrapped, and connection part can be lubricated after pressing in, avoid wear phenomenon.
[0005] The utility model discloses a kind of double-end spline self-centering torsion bars for automobile steering system, mainly set first spline, second spline, guide column, recess, first oil groove and second oil groove on the surface of axle rod, by first spline, second spline, guide column, recess, first oil groove and second oil groove can utilize guide column automatic centering, pressing force is more stable, effectively avoid the situation that torsion bar bends or breaks and is scrapped, and connection part can be lubricated after pressing in, avoid wear phenomenon.
[0006] The utility model discloses a kind of double-end spline self-centering torsion bars for automobile steering system, mainly set first spline, second spline, guide column, recess, first oil groove and second oil groove on the surface of axle rod, by first spline, second spline, guide column, recess, first oil groove and second oil groove can utilize guide column automatic centering, pressing force is more stable, effectively avoid the situation that torsion bar bends or breaks and is scrapped, and connection part can be lubricated after pressing in, avoid wear phenomenon.
[0007] In the double-end spline self-centering torsion bar for the automobile steering system, the first oil groove is communicated with the groove, and the opposite side of the first oil groove is communicated with the second oil groove.
[0008] In the double-end spline self-centering torsion bar for the automobile steering system, the opposite side of the first spline is provided with the first inclined surface, and the opposite side of the second spline is provided with the second inclined surface.
[0009] In the double-end spline self-centering torsion bar for the automobile steering system, the number of the first oil groove and the second oil groove is several, and the material of the oil storage bag is PVC.
[0010] Compared with the prior art, the double-end spline self-centering torsion bar for the automobile steering system has the advantages that the input shaft and the gear can be automatically centered by the guide column during pressing, the pressing force is more stable, the situation that the torsion bar is bent or broken and scrapped is effectively avoided, the connection part can be lubricated after pressing to avoid wear and tear, and the service life is long. BRIEF DESCRIPTION OF DRAWINGS
[0011] Figure 1 It is a perspective view of the double-end spline self-centering torsion bar for the automobile steering system.
[0012] Figure 2 It is a partial structure perspective view of the double-end spline self-centering torsion bar for the automobile steering system.
[0013] Figure 3 It is a partial structure perspective left view of the double-end spline self-centering torsion bar for the automobile steering system.
[0014] In the figure, 1 is a shaft, 2 is a first spline, 3 is a second spline, 4 is a guide column, 5 is a groove, 6 is a first oil groove, 7 is a second oil groove, 8 is an inclined angle, 9 is a first inclined surface, 10 is a second inclined surface, and 11 is an oil storage bag. DETAILED DESCRIPTION
[0015] The following is a specific embodiment of the utility model and is combined with the drawings to further describe the technical scheme of the utility model, but the utility model is not limited to these embodiments.
[0016] As Figure 1、 Figure 2 and Figure 3 As shown in the figure, the double-head spline self-centering torsion bar for automobile steering system comprises a shaft 1, first and second splines 2 and 3 are respectively arranged on both sides of the surface of the shaft 1, guide columns 4 are welded at both ends of the shaft 1, recesses 5 are respectively arranged on the opposite sides of the guide columns 4, oil storage bags 11 are bonded in the recesses 5, first and second oil grooves 6 and 7 are respectively arranged on the opposite sides and surfaces of the guide columns 4, and bevels 8 are respectively arranged on the opposite sides of the guide columns 4.
[0017] Further, the first oil grooves 6 are communicated with the recesses 5, and the opposite sides of the first oil grooves 6 are communicated with the second oil grooves 7. First bevels 9 are respectively arranged on the opposite sides of the first splines 2, and second bevels 10 are respectively arranged on the opposite sides of the second splines 3. The number of the first and second oil grooves 6 is several, and the material of the oil storage bags 11 is PVC.
[0018] In actual manufacturing, the diameter of the guide columns 4 is smaller than the maximum diameter of the first and second splines 2 and 3, the guide columns 4 at both ends are respectively inserted into the input shaft and the gear, under the action of the guide columns 4, the guide columns 4 can be used for automatic centering when the input shaft and the gear are pressed, the centering difficulty existing in the prior art is avoided, the pressing force is more stable, the situation that the shaft 1 is bent or broken and scrapped is effectively avoided, the scrap rate is reduced, the production efficiency is improved, the first spline 2 comprises a first small-diameter surface and a first large-diameter surface, the second spline 3 comprises a second small-diameter surface and a second large-diameter surface, the diameter of the first large-diameter surface of the first spline 2 is equal to the diameter of the second small-diameter surface of the second spline 3, so that the torsion bar is more smooth during insertion, the friction and collision in the insertion process are reduced, after being pressed to the appropriate position, the oil storage bags 11 are in contact with the inside of the input shaft and the output shaft, when the pressure is large, the oil storage bags 11 are broken, the lubricating oil in the oil storage bags 11 flows through the first and second oil grooves 6 and 7 at the connection, so as to lubricate the surfaces of the first and second splines 2 and 3, and wear is avoided during long-term use.
[0019] The contents not described in detail in the specification belong to the prior art known by the person skilled in the art. The specific embodiments described in the specification are only illustrative of the spirit of the utility model. The person skilled in the art to which the utility model belongs can make various modifications or supplements to the described specific embodiments or replace them with similar ways, but will not deviate from the spirit of the utility model or exceed the scope defined by the appended claims.
Claims
1. A double-headed spline self-centering torsion bar for an automotive steering system, comprising a shaft (1), characterized in that, The shaft (1) has a first spline (2) and a second spline (3) on both sides of its surface. Both ends of the shaft (1) are welded with guide posts (4). The opposite side of the guide posts (4) is provided with grooves (5). An oil storage bag (11) is bonded inside the grooves (5). The opposite side and surface of the guide posts (4) are provided with a first oil groove (6) and a second oil groove (7). The opposite side of the guide posts (4) is provided with an angle (8).
2. A double-headed spline self-centering torsion bar for an automotive steering system according to claim 1, characterized in that, The first oil groove (6) is connected to the groove (5), and the opposite side of the first oil groove (6) is connected to the second oil groove (7).
3. A double-headed spline self-centering torsion bar for an automotive steering system according to claim 1, characterized in that, The first spline (2) has a first inclined surface (9) on one side opposite to the first spline (2), and the second spline (3) has a second inclined surface (10) on the opposite side.
4. A double-headed spline self-centering torsion bar for an automotive steering system according to claim 1, characterized in that, The number of the first oil tank (6) and the second oil tank (7) are both several, and the oil storage bag (11) is made of PVC.