CN216546355U

CN216546355U - Intermediate shaft structure of automobile steering device

Info

Publication number: CN216546355U
Application number: CN202123401840.3U
Authority: CN
Inventors: 何路肥; ***; 计黄健; 蔡黎明
Original assignee: Hangzhou New Shibao Electric Power Steeling Co ltd
Current assignee: Hangzhou New Shibao Electric Power Steeling Co ltd
Priority date: 2021-12-31
Filing date: 2021-12-31
Publication date: 2022-05-17
Anticipated expiration: 2031-12-31

Abstract

The utility model relates to the field of automobile steering gears, and particularly discloses an intermediate shaft structure of an automobile steering gear. The intermediate shaft structure comprises a middle section, wherein universal joints are respectively arranged at two ends of the middle section, the middle section comprises a first section and a second section, the first section comprises a spline shaft, and the second section is provided with a spline hole; the spline shaft is provided with an inner hole; in an assembly state, the spline shaft is inserted into the spline hole, and at least one riveting part is arranged between the second section and the first section; and the riveting portion corresponds to the inner hole in the axial direction of the middle section. Above the jackshaft structure through the setting of hole, reduce the rigidity of integral key shaft, and then play the effect of increase crushing force.

Description

Intermediate shaft structure of automobile steering device

Technical Field

The utility model relates to the field of automobile steering gears, in particular to an intermediate shaft structure of an automobile steering gear.

Background

The intermediate shaft is an important component of the electric power steering system, is arranged between a steering column and a steering pull rod, and plays a role in transmitting torque. The jackshaft include the interlude, the both ends of interlude are equipped with the universal joint respectively, the universal joint include interior festival fork, outer festival fork and cross, the interlude include first segmentation and second segmentation, first segmentation includes the integral key shaft, the second segmentation on be equipped with the splined hole. In an assembled state, the spline shaft is inserted into the spline hole, and a riveting part is arranged between the second section and the spline shaft, and the riveting part is usually arranged in a riveting point mode and used for realizing connection and transmission of the first section and the second section.

Found when carrying out the crushing force test to above-mentioned jackshaft structure, the riveting portion structure between first segmentation and the second segmentation takes place easily not hard up, causes abnormal sound, crushing force unstability scheduling problem, influences user experience and safety in utilization.

Disclosure of Invention

The technical problem to be solved by the utility model is to provide an intermediate shaft structure of an automobile steering gear, and the rigidity of a spline shaft is reduced through the arrangement of an inner hole, so that the effect of increasing the crushing force is achieved.

In order to solve the technical problems, the technical scheme provided by the utility model is as follows: the intermediate shaft structure of the automobile steering gear comprises a middle section, wherein universal joints are respectively arranged at two ends of the middle section, the middle section comprises a first section and a second section, the first section comprises a spline shaft, and the second section is provided with a spline hole;

the spline shaft is provided with an inner hole; in an assembly state, the spline shaft is inserted into the spline hole, and at least one riveting part is arranged between the second section and the first section; and the riveting portion corresponds to the inner hole in the axial direction of the middle section.

The inner hole is formed in the spline shaft, so that the structural rigidity of the spline shaft is reduced. When processing the riveting portion on the second segmentation, the second segmentation is inwards out of shape to the extrusion integral key shaft is along with inside hole deformation, and the combination between integral key hole and the integral key shaft is inseparabler, and connection effect is better. Meanwhile, the section shape of the corresponding area of the spline shaft is changed by the deformation of the spline shaft, so that the axial movement of the spline shaft relative to the spline shaft is hindered, and the crushing force is further improved. In addition, because the spline shaft is deformed towards the inner hole direction in the area corresponding to the riveting part, part area of the spline shaft is deformed towards the outer side under the extrusion effect and is in contact with the spline hole, so that the contact stress points between the spline shaft and the spline hole are increased, and the effect of increasing the crushing force can be effectively played.

Preferably, the diameter D of the inner hole and the diameter of the spline shaft are D, and D: d =2/3~ 4/5.

Preferably, the length of the inner hole is B, and the length of the spline shaft is B, then B: b =2/3~ 4/5.

Preferably, the number of the riveting parts is at least two, and the riveting parts are distributed annularly around the axis of the middle section.

Preferably, the riveting portions are divided into at least two groups along the axis of the middle section.

Drawings

FIG. 1 is a schematic structural diagram of an intermediate shaft structure of an automobile steering gear according to an embodiment;

FIG. 2 is a schematic structural diagram illustrating a connection state between a first segment and a universal joint in an intermediate shaft structure of the steering gear of the present embodiment;

FIG. 3 is a schematic structural diagram illustrating a connection state between a second segment and a universal joint in an intermediate shaft structure of the steering gear of the present embodiment;

fig. 4 is a sectional view showing the spline shaft of the intermediate shaft structure of the steering gear for a vehicle according to the embodiment engaged with the second segment.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model.

Examples

As shown in fig. 1-4, an intermediate shaft structure of an automobile steering gear comprises an intermediate section 2, universal joints 1 are respectively arranged at two ends of the intermediate section 2, the intermediate section 2 comprises a first section 21 and a second section 22, the first section 21 comprises a spline shaft 211, and the second section 22 is provided with a spline hole 221. In the assembled state, spline shaft 211 is inserted into spline hole 221.

As shown in fig. 1-4, at least one riveting portion 3 is provided between the second segment 22 and the first segment 21. The spline shaft 211 is provided with an inner hole 212, and the riveting part 3 corresponds to the inner hole 212 in the axial direction of the middle section 2. The riveting portion 3 may be in the form of a riveting point.

Specifically, the diameter D of the inner hole 212 and the diameter D of the spline shaft 211 are D, and then D: d =2/3~ 4/5. The length of the inner hole 212 is B, and the length of the spline shaft 211 is B, then B: b =2/3~ 4/5. The diameter and length of the inner hole 212 can be adjusted according to the number of the riveting portions 3 and the required parameters of the crushing force. The diameter D of the spline shaft 211 is based on the diameter of the addendum circle.

The spline shaft 211 is provided with an inner hole 212, which reduces the structural rigidity of the spline shaft 211. When the riveting portion 3 is machined on the second section 22, the second section 22 deforms inwards, the spline shaft 211 is extruded to deform towards the inner hole 212, the combination between the spline hole 221 and the spline shaft 211 is tighter, and the connection effect is better. Meanwhile, the section shape of the corresponding area of the spline shaft 211 is changed by the deformation of the spline shaft 211, so that the axial movement of the spline shaft 211 relative to the spline shaft 211 is hindered, and the crushing force is further improved. In addition, because the spline shaft 211 is deformed toward the inner hole 212 in the region corresponding to the riveting portion 3, under the extrusion action, part of the region of the spline shaft 211 is deformed outward and is in contact with the spline hole 221, so that the contact stress points between the spline shaft 211 and the spline hole 221 are increased, and the effect of increasing the crushing force can be effectively achieved.

Further, the number of the riveting parts 3 is at least two, and the riveting parts are annularly distributed around the axis of the middle section 2. The riveting parts 3 are divided into at least two groups along the axis of the middle section 2.

In conclusion, the above description is only for the preferred embodiment of the present invention and should not be construed as limiting the present invention, and any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The intermediate shaft structure of the automobile steering gear comprises a middle section, wherein universal joints are respectively arranged at two ends of the middle section, the middle section comprises a first section and a second section, the first section comprises a spline shaft, and the second section is provided with a spline hole; the method is characterized in that:

2. The countershaft structure of claim 1, wherein: the diameter D of hole, the diameter of integral key shaft is D, then has D: d =2/3~ 4/5.

3. The countershaft structure of claim 1 or 2, wherein: the length of hole is B, the length of integral key shaft is B, then has B: b =2/3~ 4/5.

4. The countershaft structure of claim 1, wherein: the riveting portion is at least two in number and is annularly distributed around the axis of the middle section.

5. The countershaft structure of claim 4, wherein: the riveting parts are divided into at least two groups along the axis of the middle section.