CN220374612U - Cold extrusion spline shaft for steering - Google Patents

Abstract

The utility model relates to the technical field of automobile accessories, in particular to a cold extrusion spline shaft for steering. Including steering spindle main part, its characterized in that: the steering shaft is characterized in that one end of the steering shaft main body is connected with an input shaft main body, one end of the steering shaft main body is connected with a steering shaft external spline, one side of the steering shaft external spline is provided with threaded grooves uniformly arranged at axial intervals, and the outer wall of the steering shaft main body is sleeved with a rubber sleeve in interference fit.

Description

Cold extrusion spline shaft for steering

Technical Field

The utility model relates to the technical field of automobile accessories, in particular to a cold extrusion spline shaft for steering.

Background

The steering shaft is an important component in an automobile steering system, the design of the steering shaft must ensure that the steering shaft can reliably transmit torque, so that the steering wheel is positioned at a position which accords with the driving posture of a driver, collision energy can be absorbed when collision occurs, and the safety of the driver is protected, so that the design of the steering shaft is very important, the requirement on spline strength is high, the traditional spline shaft for steering is easy to cause uneven stress due to the structural reason, the service life is short, frequent replacement is needed, and the production is not only troublesome but also seriously affected.

Chinese patent discloses an internal spline shaft (publication No. CN 216555021U) comprising a shaft body, a first oil storage tank and a second oil storage tank, wherein the first oil storage tank is disposed at one side of the shaft body, and the second oil storage tank is disposed at the other side of the shaft body; an inner core is arranged in the inner spline shaft main body, and a shaft hub is arranged at one end of the inner core; the inner core is provided with the first oil guide hole and the second oil guide hole, but the spline shaft is uneven in structure stress, short in service life and low in strength, so that the cold extrusion spline shaft for steering is needed.

Disclosure of Invention

The utility model aims to solve the defects of uneven stress, short service life and low strength in the prior art, and provides a cold extrusion spline shaft for steering.

The technical scheme adopted for solving the technical problems is as follows: the utility model relates to a cold extrusion spline shaft for steering, which comprises a steering shaft main body and is characterized in that: the steering shaft comprises a steering shaft body, and is characterized in that one end of the steering shaft body is connected with an input shaft body, one end of the steering shaft body is connected with a steering shaft external spline, one side of the steering shaft external spline is provided with threaded grooves uniformly arranged at axial intervals, and the outer wall of the steering shaft body is sleeved with a rubber sleeve in interference fit.

Preferably, the rubber sleeve is an elastic rubber piece, the rubber sleeve is cylindrical and is coaxially arranged with the body, a buffer layer is arranged on the inner wall of the rubber sleeve, the thickness of the buffer layer is 1-1.5 cm, and the buffer layer is arranged, so that the acting force of external force is reduced when the steering shaft main body is extruded by the external force.

Preferably, the steering shaft main body comprises a first shaft section, one end of the first shaft section is connected with a conical surface table, one end of the conical surface table is connected with a second shaft section, one end of the second shaft section is connected with a third shaft section, and a steering shaft internal spline tooth slot is formed in the third shaft section and is convenient to press a lock sleeve for positioning by arranging the conical surface table.

Preferably, the junction of first axle section and second axle section is equipped with annular arc groove, is convenient for steering wheel angle alignment and guarantees the requirement to the phase angle when assembling through setting up annular arc groove.

Preferably, the input shaft main body comprises an input shaft section, one end of the input shaft section is provided with a fixed plug, an input shaft internal spline tooth groove is arranged in the input shaft section, the input shaft internal spline tooth groove is in associated fit with the steering shaft internal spline tooth groove, and the input shaft main body end is connected with one end of the steering shaft main body conveniently by arranging the associated fit of the input shaft internal spline tooth groove and the steering shaft internal spline tooth groove.

Preferably, the number of teeth of the external spline of the steering shaft is 36, the tooth angle of the external spline of the steering shaft is 80 degrees, and the tooth groove angle is 90 degrees.

The utility model has the advantages that:

the spline shaft for steering has the advantages that the structure is simple, the failure rate is low, the surface dimensional precision is improved by adopting a cold extrusion technology, raw materials are saved, the production efficiency is high, the strength is high, the rigidity is good, the weight is light, the angle alignment of a steering wheel is convenient by arranging the annular arc groove, the requirement on a phase angle during assembly is ensured, the assembly machining precision is ensured, the buffer layer is arranged, when the steering shaft main body is extruded by external force, the acting force of the external force is reduced, the steering shaft main body is protected, and the lock sleeve is convenient to position by arranging the conical surface table; through setting up input shaft internal spline tooth groove and steering shaft internal spline tooth groove and being connected in coordination, improved the steadiness of junction, the input shaft main part of being convenient for is fixed with the steering shaft main part connection, and dismantles simply.

Drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the utility model, and that other drawings can be obtained from these drawings without inventive faculty for a person skilled in the art.

FIG. 1 is a schematic view of a structural assembly of the present utility model.

Figure 2 is a cross-sectional view of A-A of figure 1 in accordance with the present utility model.

Fig. 3 is a front view of the steering shaft structure of the present utility model.

Fig. 4 is a cross-sectional view of B-B of fig. 3 in accordance with the present utility model.

Fig. 5 is a cross-sectional view of C-C of fig. 4 in accordance with the present utility model.

Fig. 6 is a cross-sectional view of D-D of fig. 4 in accordance with the present utility model.

Fig. 7 is an enlarged view of I in fig. 4 in accordance with the present utility model.

In the figure: 1. a steering shaft external spline; 2. a first shaft section; 3. a conical surface table; 4. a second shaft section; 5. a rubber sleeve; 6. a third shaft section; 7. an input shaft section; 8. fixing the plug; 9. an annular arc groove; 10. a buffer layer; 11. spline tooth grooves in the input shaft; 12. a thread groove; 13. spline tooth grooves are formed in the steering shaft.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Examples

Referring to fig. 1 to 7, a cold extrusion spline shaft for steering, comprising a steering shaft main body, is characterized in that: the steering shaft is characterized in that the steering shaft body is hollow, one end of the steering shaft body is connected with an input shaft body, one end of the steering shaft body is connected with a steering shaft external spline 1, one side of the steering shaft external spline 1 is provided with threaded grooves 12 uniformly arranged at axial intervals, the outer wall of the steering shaft body is sleeved with a rubber sleeve 5 in interference fit, the steering shaft body is manufactured by adopting a cold extrusion technology, and the cold extrusion technology has the advantages that:

(1) The extruded part has accurate size, smooth surface and high size precision, so the part manufactured by the cold extrusion method generally does not need to be reprocessed, and a small amount of the part only needs to be finished (ground);

(2) Raw material saving: the utilization rate of the cold extrusion material can reach more than 80%, for example, after the universal joint bearing sleeve is changed to be cold extruded, the utilization rate of the material is improved to 64% from 27.8% in the past, and a cold extrusion method is adopted to produce mechanical parts, so that a large amount of steel and nonferrous metal materials can be saved;

(3) The productivity is high: the efficiency of producing mechanical parts by the cold extrusion method is very high, especially producing parts with large batch, and the production by the cold extrusion method can be improved by several times, tens of times or even hundreds of times compared with the cutting processing;

(4) Parts with complex shapes can be processed: such as special-shaped cross section, internal teeth, special-shaped holes, blind holes and the like, which are difficult to be finished by adopting other processing methods, and are quite convenient to be processed by cold extrusion.

The parts shown can be conveniently extruded;

(5) The cold extrusion has high strength, good rigidity and light weight: because cold extrusion adopts cold work strengthening characteristic of cold deformation of metal materials, namely, a metal blank is in a three-way compressive stress state in the extrusion process, and the deformed materials have compact structure and continuous fiber flow direction, the strength of the product is greatly improved. Thus, a low strength material may be used instead of a high strength material.

In this embodiment, rubber sleeve 5 is the elastic rubber spare, the elastic rubber spare is the common product in market, can directly purchase, rubber sleeve 5 is cylindric and with the coaxial setting of body, rubber sleeve 5 cover is established at steering spindle main part outer wall and rather than interference fit, rubber sleeve 5 inner wall is equipped with buffer layer 10, buffer layer 10 thickness is 1 ~ 1.5cm, through setting up buffer layer 10, when external force extrusion steering spindle main part, has reduced the effort of external force.

In this embodiment, the steering shaft main body includes first axle section 2, first axle section 2 one end is connected with conical surface platform 3, conical surface platform 3 one end is connected with second axle section 4, second axle section 4 one end is connected with third axle section 6, the inside steering shaft internal spline tooth's socket 13 that is equipped with of third axle section 6 is convenient for lock sleeve location through setting up conical surface platform 3.

In this embodiment, the junction of first axle section 2 and second axle section 4 is equipped with annular arc groove 9, is convenient for steering wheel angle alignment and guarantees the requirement to the phase angle when assembling through setting up annular arc groove 9.

In this embodiment, the input shaft main body includes input shaft section 7, input shaft section 7 one end is equipped with fixed end cap 8, the inside input shaft internal spline tooth groove 11 that is equipped with of input shaft section 7, the associated cooperation of input shaft internal spline tooth groove 11 and steering shaft internal spline tooth groove 13 is convenient for input shaft main body one end and steering shaft main body one end be connected through setting up the associated cooperation of input shaft internal spline tooth groove 11 and steering shaft internal spline tooth groove 13.

In this embodiment, the number of teeth of the external spline 1 of the steering shaft is 36, the tooth angle of the external spline 1 of the steering shaft is 80 °, and the tooth groove angle is 90 °.

The implementation principle of the embodiment is as follows: the annular arc groove 9 is arranged to facilitate steering wheel angle alignment and ensure the requirement on phase angle during assembly, the assembly processing precision is ensured, the buffer layer 10 is arranged to reduce the acting force of external force when the external force extrudes the steering shaft main body, the steering shaft main body is protected, and the conical surface platform 3 is arranged to facilitate lock sleeve positioning; through setting up input shaft internal spline tooth groove 11 and steering spindle internal spline tooth groove 13 to cooperate and be connected, improved the steadiness of junction, the input shaft main part of being convenient for is fixed with the steering spindle main part connection, and dismantles simply.

In the description of the present specification, the descriptions of the terms "one embodiment," "example," "specific example," and the like, mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The foregoing has shown and described the basic principles, principal features and advantages of the utility model. It will be understood by those skilled in the art that the present utility model is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present utility model, and various changes and modifications may be made without departing from the spirit and scope of the utility model, which is defined in the appended claims.

Claims (6)

1. The utility model provides a cold extrusion integral key shaft that turns to usefulness, includes steering spindle main part, its characterized in that: the steering shaft is characterized in that one end of the steering shaft body is connected with an input shaft body, one end of the steering shaft body is connected with a steering shaft external spline (1), one side of the steering shaft external spline (1) is provided with threaded grooves (12) which are uniformly arranged at axial intervals, and the outer wall of the steering shaft body is sleeved with a rubber sleeve (5) in interference fit.

2. A cold-extruded spline shaft for steering as claimed in claim 1, wherein: the rubber sleeve (5) is an elastic rubber piece, the rubber sleeve (5) is cylindrical and is coaxially arranged with the body, a buffer layer (10) is arranged on the inner wall of the rubber sleeve (5), and the thickness of the buffer layer (10) is 1-1.5 cm.

3. A cold-extruded spline shaft for steering as claimed in claim 1, wherein: the steering shaft main body comprises a first shaft section (2), one end of the first shaft section (2) is connected with a conical surface table (3), one end of the conical surface table (3) is connected with a second shaft section (4), one end of the second shaft section (4) is connected with a third shaft section (6), and a steering shaft internal spline tooth groove (13) is formed in the third shaft section (6).

4. A cold-extruded spline shaft for steering as claimed in claim 3, wherein: an annular arc groove (9) is formed in the joint of the first shaft section (2) and the second shaft section (4).

5. A cold-extruded spline shaft for steering as claimed in claim 1, wherein: the input shaft main body comprises an input shaft section (7), a fixed plug (8) is arranged at one end of the input shaft section (7), an input shaft internal spline tooth groove (11) is arranged in the input shaft section (7), and the input shaft internal spline tooth groove (11) is in associated fit with a steering shaft internal spline tooth groove (13).

6. A cold-extruded spline shaft for steering as claimed in claim 1, wherein: the number of spline teeth of the external spline (1) of the steering shaft is 36, the tooth angle of the external spline (1) of the steering shaft is 80 degrees, and the tooth groove angle is 90 degrees.