CN202266546U

CN202266546U - Sliding spline sleeve for steering shaft

Info

Publication number: CN202266546U
Application number: CN2011203390237U
Authority: CN
Inventors: 陈粮
Original assignee: SHIYAN HERCULES INDUSTRY TRADE CO LTD
Current assignee: Shiyan Hercules Technology Co., Ltd.
Priority date: 2011-09-11
Filing date: 2011-09-11
Publication date: 2012-06-06
Anticipated expiration: 2021-09-11

Abstract

The utility model provides a sliding spline sleeve for a steering shaft. The sliding spline sleeve comprises an internal spline section and a circular tube section which are of an integrated structure, and are coaxial with each other, wherein an internal spline of the internal spline section is uniformly distributed along the circumference; the number of teeth of the internal spline is equal to 3-6; and the excircle of the internal spline section is correspondingly formed into a rugged curved surface. The internal spline section and the circular tube section are integrated steel tubes which are same in outer diameter and wall thickness, so that materials are saved; by utilizing the structure of the sliding spline sleeve, the cost is reduced, and the production efficiency is improved; furthermore, without welded scars, the sliding spline sleeve is attractive in appearance.

Description

A kind of steering shaft free-sliding spline cover

Technical field

The utility model relates to the spline housing that uses on a kind of motor turning transmission device, the especially a kind of and matching used free-sliding spline cover of steering shaft.

Background technique

What use on the motor turning transmission device at present, is spline housing and column tube welded structure.Spline housing generally adopts thick-walled seamless steel pipes, and machining process comprises that tubing blanking, endoporus Vehicle Processing, internal spline are repeatedly broached, the cylindrical Vehicle Processing; The general seamless steel pipe that relatively approaches that adopts of column tube is through tubing blanking, car welding matching hole manufacturing process; The spline housing and the column tube welding of completion of processing are formed steering shaft free-sliding spline cover.The free-sliding spline cover of this processes, stock utilization is low, and multiple tracks Vehicle Processing technology, multiple tracks internal spline Broaching Technology and welding procedure are arranged, and processing cost and cost of material are higher, and manufacturing efficiency is lower.

Summary of the invention

In order to reduce the processing cost of steering shaft free-sliding spline cover, to enhance productivity, the utility model proposes a kind of steering shaft free-sliding spline cover.

The utility model is realized through following proposal: a kind of steering shaft free-sliding spline cover; Comprise internal spline section and pipe section; It is characterized in that: internal spline section and pipe section are overall structures, and internal spline section and pipe section are coaxial, and the internal spline of internal spline section is uniformly distributed along the circumference; The number of teeth of internal spline is 3～6, the scraggly curved surface of the corresponding formation of the cylindrical of internal spline section.

Further qualification to technique scheme: internal spline section and pipe section are to adopt the finish rolling steel pipe integral to be shaped.

Beneficial effect: internal spline section of (1), the utility model and pipe section are the whole steel pipes that external diameter, wall thickness equate, economical with materials; (2), the structure of the utility model, reduced manufacturing procedure, not only reduce cost but also enhance productivity; (3), do not had a welding scar, the outward appearance of free-sliding spline cover is good.

Description of drawings

Fig. 1 is the structural representation of the utility model.

Fig. 2 is along the A-A sectional drawing among Fig. 1.

Embodiment

Like Fig. 1, shown in Figure 2; It is following to further describe the utility model: a kind of steering shaft free-sliding spline cover; Be a whole pipe fitting 1, whole pipe fitting 1 constitutes overall structure by internal spline section 1b and pipe section 1a, and internal spline section 1b and pipe section 1a are coaxial; The internal spline 2 of internal spline section is uniformly distributed along the circumference, and the number of teeth of internal spline 2 is 4.As shown in Figure 2, the scraggly curved surface of the corresponding formation of the cylindrical of internal spline section.

For the number of teeth of internal spline 2, be not limited to 4; The number of teeth of internal spline 2 can be confirmed in 3～6 scope.

The whole pipe fitting 1 general finish rolling steel pipe that adopts.

Except that above-mentioned mode of execution, the utility model can also have other mode of executions.All employings are equal to the technological scheme of replacement or equivalent transformation formation, all drop on the protection domain of the utility model requirement.

The processing method of a kind of steering shaft free-sliding spline cover of the utility model is:

(1), blanking: tubing is placed saw bench, move tubing to length limiting stopper and clamping, the opening device saw expects that pipe material length is that design size adds 2～3 millimeters;

(2), fall in the exterior angle: clamping pipe material on chamfering machine, exterior angle and planar end surface in falling by product specification requirements adjustment knife rest take off once more the clamping processing the other end, guarantee that length adheres to specification, both ends of the surface are expected outer wall vertical degree≤0.08 with managing;

(3), roll extrusion pretreatment: process is divided into degreasing, washes, dries, and by the internal spline length of product specification, inside and outside pipe material one end, is coated with molybdenum disulfide; Can adopt the dip-coating mode to be coated with molybdenum disulfide;

(4), the spline roll extrusion: scribble molybdenum disulfide one end and upwards will manage material and put into die, primer fluid press button, patrix is descending, the internal spline roll forming starts the backhaul button, patrix is up, starts the liftout button, ejects the pipe material and takes out; Transverse tooth thickness is reserved 0.1～0.15 millimeter surplus after the roll extrusion, offsets pipe thickness tolerance and roll extrusion cold deformation with broaching correction;

(5), broaching revises: the pipe material clamping of roll forming on broaching machine, is broached with special-purpose broaching tool and to be revised and check.Use special-purpose broaching tool internally to spend flank to carry out finishing, 0.1～0.15 millimeter the surplus of reserving during with roll extrusion through broaching is got rid of, thereby internally spline teeth, teeth directional, tooth pitch etc. are revised on a small quantity, to improve precision.

Claims

1. steering shaft free-sliding spline cover; Comprise internal spline section and pipe section; It is characterized in that: internal spline section and pipe section are overall structures, and internal spline section and pipe section are coaxial, and the internal spline of internal spline section is uniformly distributed along the circumference; The number of teeth of internal spline is 3～6, the scraggly curved surface of the corresponding formation of the cylindrical of internal spline section.

2. a kind of steering shaft free-sliding spline cover according to claim 1 is characterized in that: internal spline section and pipe section are to adopt the finish rolling steel pipe integral to be shaped.

3. a kind of steering shaft free-sliding spline cover according to claim 1 and 2, it is characterized in that: the number of teeth of internal spline is 4.