CN219172501U

CN219172501U - Double-end spline structure steering torsion bar

Info

Publication number: CN219172501U
Application number: CN202320710692.3U
Authority: CN
Inventors: 董西杰; 彭四兰; 卓超峰; 林景扬
Original assignee: Zhejiang Huixuan Auto Parts Co ltd
Current assignee: Zhejiang Huixuan Auto Parts Co ltd
Priority date: 2023-04-04
Filing date: 2023-04-04
Publication date: 2023-06-13
Anticipated expiration: 2033-04-04

Abstract

The utility model provides a double-head spline structure steering torsion bar which comprises a torsion bar body, wherein first spline rods are integrally formed at two ends of the torsion bar body, a connecting column is fixedly connected to one end of the first spline rod, which is far away from the torsion bar body, a second spline rod is fixedly connected to one end of the connecting column, which is far away from the first spline rod, assembly components are sleeved on the surfaces of the first spline rod and the second spline rod, each assembly component comprises a sleeve, and a first spline groove is formed on the right side of the sleeve. According to the utility model, through the matching of the torsion bar body, the first spline rod, the connecting column, the second spline rod and the assembly component, the spline structure at two ends is adopted, the torque born by the spline interference fit is larger than that born by the polished rod after the interference fit, the service life and the use strength of parts are improved, and when the spline is assembled with a gear, the centering accuracy is high, the guidance quality is good, and the stability after the assembly is improved compared with the polished rod structure with a plurality of groups of spline structures.

Description

Double-end spline structure steering torsion bar

Technical Field

The utility model belongs to the technical field of automobile accessories, relates to a steering accessory, and particularly relates to a steering torsion bar with a double-head spline structure.

Background

The steering torsion bar is used for transmitting motion and power steering, and is a part for transmitting torque in a steering gear.

For example, chinese patent literature discloses a steering torsion bar [ application number: 202121738653.1; authorized bulletin number: CN215284962U ], it includes the body of rod, input shaft installation department and output shaft installation department, the one end of keeping away from input shaft installation department of output shaft installation department is fixed to be provided with output shaft chamfer structure, output shaft chamfer structure includes first chamfer and second chamfer, first chamfer and second chamfer are round platform column structure, first chamfer and second chamfer set up with the body of rod coaxial line, first chamfer is located the outside of second chamfer, first chamfer and second chamfer fixed connection, the angle of first chamfer is greater than the angle of second chamfer, first chamfer includes first little diameter face and first big diameter face, the second chamfer includes second little diameter face and the big diameter face of second, the diameter of first big diameter face is less than or equal to the diameter of second little diameter face. The steering torsion bar can improve the coaxiality of the output shaft mounting part and the mounting hole in the inserting way, so that the steering torsion bar and the mounting hole of the output shaft can be conveniently in good interference fit and in the inserting way, and the inserting precision is improved.

However, the steering torsion bar still has some defects in actual use, and obviously, the existing steering torsion bar and the gear end are in interference fit into a polished rod structure, so that the product has weak guidance in the press fitting process, relatively weak centering precision, few parts are scrapped, the polished rod part has long structure, the requirement on the outer circle size and the action tolerance is high, the processing difficulty in the process is high, and the stability and the precision of the connection with the gear cannot be enhanced through the cooperation of a spline set.

Disclosure of Invention

The utility model aims to provide a double-end spline structure steering torsion bar which has the advantages that a two-end spline structure is adopted, the torque born by the spline interference fit is larger than that born by a polished rod interference fit, the service life and the service strength of parts are improved, and the problems that the existing interference fit with a gear end is of a polished rod structure, the guidance performance of a product is not strong in the press fitting process, the centering precision is relatively weak, the processing difficulty of the polished rod structure is high, and the stability and the precision of connection with a gear cannot be enhanced through the matching of a spline set are solved.

The aim of the utility model can be achieved by the following technical scheme: the utility model provides a double-end spline structure turns to torsion bar, includes the torsion bar body of rod, the equal integrated into one piece in both ends of torsion bar body of rod first spline pole, the one end fixedly connected with spliced pole of the torsion bar body of rod is kept away from to first spline pole, the one end fixedly connected with second spline pole of first spline pole is kept away from to the spliced pole, the surface cover of first spline pole and second spline pole is equipped with assembly components.

In the steering torsion bar with the double-head spline structure, the assembly component comprises a sleeve, a first spline groove is formed in the right side of the sleeve, a second spline groove is formed in the left side of the inside of the sleeve, and the first spline groove is communicated with the second spline groove.

In the double-ended spline structured steering torsion bar described above, the maximum diameters of the first spline groove and the second spline groove are the same, and the minimum inner diameter of the first spline groove is larger than the minimum inner diameter of the second spline groove.

In the steering torsion bar with the double-head spline structure, a third spline rod is fixedly connected to the left side of the inner cavity of the sleeve, a third spline groove is formed in the surface of the first spline rod, and the right end of the third spline rod extends to the inner cavity of the third spline groove.

In the steering torsion bar with the double-head spline structure, the first spline rod is located in the inner cavity of the first spline groove, and the first spline rod is matched with the first spline groove.

In the steering torsion bar with the double-head spline structure, the second spline rod is located in an inner cavity of the second spline groove, and the second spline rod is matched with the second spline groove.

In the double-head spline structure steering torsion bar, the surface of the first spline rod is provided with large spline convex teeth, and the surface of the second spline rod is provided with small spline convex teeth.

Compared with the prior art, the utility model has the following beneficial effects:

1. according to the utility model, through the matching of the torsion bar body, the first spline rod, the connecting column, the second spline rod and the assembly component, the spline structure at two ends is adopted, the torque born by the spline after interference fit is larger than that born by the polished rod after interference fit, and the service life and the service strength of parts are improved.

2. Compared with a polished rod structure with a plurality of groups of spline structures, the utility model has good centering accuracy and good guidance quality, and improves the stability after assembly.

Drawings

Fig. 1 is a structural sectional exploded schematic view of the double-ended spline structure steering torsion bar.

Fig. 2 is an exploded perspective view of the steering torsion bar of the double-ended spline structure.

Fig. 3 is a partial perspective view of the steering torsion bar of the double-ended spline structure.

Fig. 4 is a schematic perspective sectional view of an assembly component in the steering torsion bar of the double-ended spline structure.

Fig. 5 is a schematic perspective view of an assembly component in the steering torsion bar of the double-ended spline structure.

In the figure, 1, a torsion bar body; 2. a first spline bar; 3. a connecting column; 4. a second spline bar; 5. assembling the assembly; 6. a sleeve; 7. a first spline groove; 8. chamfering the corner surface; 9. a second spline groove; 10. a third spline bar; 11. a third spline groove; 12. small spline raised teeth; 13. large spline lobe teeth.

Description of the embodiments

The following are specific embodiments of the present utility model and the technical solutions of the present utility model will be further described with reference to the accompanying drawings, but the present utility model is not limited to these embodiments.

As shown in fig. 1, fig. 2, fig. 3, fig. 4 and fig. 5, the steering torsion bar with the double-headed spline structure comprises a torsion bar body 1, two ends of the torsion bar body 1 are integrally formed with a first spline rod 2, one end of the first spline rod 2, which is far away from the torsion bar body 1, is fixedly connected with a connecting column 3, one end of the connecting column 3, which is far away from the first spline rod 2, is fixedly connected with a second spline rod 4, and the surfaces of the first spline rod 2 and the second spline rod 4 are sleeved with an assembly component 5.

Further, the fitting assembly 5 comprises a sleeve 6, a first spline groove 7 is formed in the right side of the sleeve 6, a second spline groove 9 is formed in the left side of the sleeve 6, and the first spline groove 7 is communicated with the second spline groove 9. The maximum diameters of the first spline groove 7 and the second spline groove 9 are the same, and the minimum inner diameter of the first spline groove 7 is larger than the minimum inner diameter of the second spline groove 9.

The third spline rod 10 is fixedly connected to the left side of the inner cavity of the sleeve 6, the third spline groove 11 is formed in the surface of the first spline rod 2, the right end of the third spline rod 10 extends to the inner cavity of the third spline groove 11, the stability of connection of the third spline rod 10 and the sleeve 6 is enhanced again through interference fit of the third spline rod 10 and the third spline groove 11, and the assembly precision of the steering torsion bar is improved.

The first spline rod 2 is positioned in the inner cavity of the first spline groove 7, and the first spline rod 2 is matched with the first spline groove 7. The second spline rod 4 is positioned in the inner cavity of the second spline groove 9, and the second spline rod 4 is matched with the second spline groove 9.

The surface of first spline pole 2 is provided with big spline protruding tooth 13, the surface of second spline pole 4 is provided with little spline protruding tooth 12, the width of big spline protruding tooth 13 is greater than the width of little spline protruding tooth 12, the biggest external diameter of first spline pole 2 is the same with second spline pole 4, the quantity of little spline protruding tooth 12 is the same with big spline protruding tooth 13, little spline protruding tooth 12 and big spline protruding tooth 13 all arrange along spliced pole 3 outer lane hoop equidistance, through setting up the cooperation of big spline protruding tooth 13 and little spline protruding tooth 12, can with the inner wall interference fit of first spline groove 7 and second spline groove 9, the stability and the precision that reinforcing first spline pole 2 and second spline pole 4 and spline groove are connected.

Both sides on the surface of the torsion bar body 1 are provided with chamfer faces 8, and the connecting part of the torsion bar body 1 and the first spline rod 2 is smoother through the chamfer faces 8, so that the aesthetic property of the steering torsion bar is improved.

When the double-end spline structure steering torsion bar is used, the first spline rod 2 and the second spline rod 4 are inserted into the inner cavity of the sleeve 6, at the moment, the first spline rod 2 is positioned in the inner cavity of the first spline groove 7, the second spline rod 4 is positioned in the inner cavity of the second spline groove 9, the third spline rod 10 is positioned in the inner cavity of the third spline groove 11, the steering torsion bar and the sleeve 6 are assembled together, the sleeve 6 and the external gear are of an integrated structure, so that the gear and the steering torsion bar are fixedly installed together, one end of the steering torsion bar is connected with the gear, the other end of the steering torsion bar is connected with the output end of the external machine, and the sleeve 6 at the other end of the steering torsion bar can also be of an integrated structure with the output end of the external machine.

What is not described in detail in this specification is prior art known to those skilled in the art. The specific embodiments described herein are offered by way of example only to illustrate the spirit of the utility model. Those skilled in the art may make various modifications or additions to the described embodiments or substitutions thereof without departing from the spirit of the utility model or exceeding the scope of the utility model as defined in the accompanying claims.

Claims

1. The utility model provides a double-end spline structure turns to torsion bar, includes torsion bar body of rod (1), its characterized in that, the equal integrated into one piece of both ends of torsion bar body of rod (1) first spline pole (2), the one end fixedly connected with spliced pole (3) of torsion bar body of rod (1) are kept away from to first spline pole (2), the one end fixedly connected with second spline pole (4) of first spline pole (2) are kept away from to spliced pole (3), the surface cover of first spline pole (2) and second spline pole (4) is equipped with assembly component (5).

2. The double-ended spline structured steering torsion bar according to claim 1, wherein the assembly member (5) comprises a sleeve (6), a first spline groove (7) is provided on the right side of the sleeve (6), a second spline groove (9) is provided on the left side of the inside of the sleeve (6), and the first spline groove (7) is communicated with the second spline groove (9).

3. A double-ended spline structured steering torsion bar according to claim 2, wherein the maximum diameters of the first spline groove (7) and the second spline groove (9) are the same, and the minimum inner diameter of the first spline groove (7) is larger than the minimum inner diameter of the second spline groove (9).

4. A double-ended spline structured steering torsion bar according to claim 3, wherein a third spline bar (10) is fixedly connected to the left side of the inner cavity of the sleeve (6), a third spline groove (11) is formed in the surface of the first spline bar (2), and the right end of the third spline bar (10) extends to the inner cavity of the third spline groove (11).

5. The double-ended spline structured steering torsion bar of claim 4, wherein said first spline shaft (2) is located within an interior cavity of a first spline groove (7), said first spline shaft (2) being used in cooperation with said first spline groove (7).

6. A double-ended spline structured steering torsion bar in accordance with claim 5, wherein said second spline shaft (4) is located in an interior cavity of a second spline groove (9), said second spline shaft (4) being used in cooperation with said second spline groove (9).

7. A double-ended spline structured steering torsion bar according to claim 6, wherein the surface of the first spline rod (2) is provided with large spline projection teeth (13), and the surface of the second spline rod (4) is provided with small spline projection teeth (12).

8. The double-ended spline structured steering torsion bar according to claim 7, wherein both sides of the surface of the torsion bar body (1) are provided with chamfer faces (8).