CN203161736U

CN203161736U - Involute external spline

Info

Publication number: CN203161736U
Application number: CN 201320039936
Authority: CN
Inventors: 文俊; 李丹; 陈伟; 李昌华
Original assignee: Anhui Jianghuai Automobile Group Corp
Current assignee: Anhui Jianghuai Automobile Group Corp
Priority date: 2013-01-24
Filing date: 2013-01-24
Publication date: 2013-08-28
Anticipated expiration: 2023-01-24

Abstract

The utility model provides an involute external spline. The involute external spline comprises a spline shaft and involute spline teeth. Chamfer regions are arranged on two sides of one ends of the spline teeth. The thickness of the spline teeth is thinned within a small section of range of the installation end of the external spline, and then a small chamfer is designed, the fit mode of the spline is turned into clearance fit from interference fit, the involute external spline provides a guidance design for the installation of the spline, therefore, the spline can be smoothly installed in the actual pressure installation process, and parts are effectively prevented from being damaged.

Description

A kind of involute outer spline

Technical field

The utility model relates to a kind of spline, is specifically related to a kind of involute outer spline.

Background technique

Spline is divided into internal spline and external splines.Inside and outside spline is multiple tooth part, and the spline on inner periphery is internal spline, and the spline on outer cylinder surface is external splines.The difference of single spline and flat key is that sectional shape is different, and the cross section of flat key mostly is rectangle, and spline is involute profile.So single from shape and processing mode, spline is the same with spur gear.

At present typical spline-shaped is column straight-tooth or column straight-tooth involute shape.The application of spline also needs to provide accurate radial support and location except union piece transmits moment of torsion.This internal spline and external splines that just needs in the spline fitted is interference fit.

Before the press-fiting of interference fit spline; need to guarantee that the gear teeth (or teeth groove) of internal spline and the teeth groove (or gear teeth) of external splines align fully; and the spline of column straight-tooth or column straight-tooth involute shape causes spline to press-fit through regular meeting when press-fiting, or causes spline to damage.

The model utility content

In order to address the above problem, the purpose of this utility model just provides a kind of flank of tooth microcosmic profiling mode of involute outer spline, aligns fully before press-fiting with external splines in guaranteeing.

In order to realize the purpose of this utility model, the technical solution of the utility model is as follows:

A kind of involute outer spline comprises splined shaft and involute key tooth, and wherein, end both sides of described key tooth are provided with chamfered area.

Preferably, described chamfered area becomes axisymmetric in key tooth both sides.

Preferably, in the described chamfered area, the end section of key tooth bi-side is still involute profile.

The beneficial effects of the utility model are as follows:

The utility model is in a bit of scope of the mounting end of external splines, the transverse tooth thickness of attenuate spline, formed a chamfered area, make the cooperation of spline become Spielpassung by interference fit, this structural design provides a kind of guiding design for the installation of spline, spline can be installed in the pressure installation process of reality smoothly, and effectively prevented the damage of part.

Description of drawings

Fig. 1 is the utility model involute splines stereogram;

Fig. 2 is the chamfered area figure of the single gear teeth of the utility model involute splines;

Fig. 3 is the stereogram of the single gear teeth of common involute splines;

Fig. 4 is end section p2 figure among Fig. 3;

Fig. 5 is the utility model shaft section P1 figure;

Fig. 6 is shaft section p1 figure among Fig. 3.

Reference character is as follows among the figure:

Splined shaft 1, involute key tooth 2, chamfered area 3.

Embodiment

Introduce the utility model in detail below in conjunction with accompanying drawing and embodiment thereof.

As shown in Figure 1, 2, a kind of involute outer spline comprises splined shaft 1 and involute key tooth 2, and wherein, the transverse tooth thickness at an end both sides attenuate key tooth of described key tooth 2 has formed chamfered area 3.

As shown in Figure 2, two side B2, B3 of described key tooth 2 are to the transverse tooth thickness of same end face A face attenuate key tooth, dotted portion is the shape of common involute splines among the figure, solid line partly is the involute splines that the utility model is described, from dotted portion to realizing that part from the bi-side B2 of key tooth, the transverse tooth thickness of B3 attenuate key tooth, has formed the chamfered area 3 of a symmetry.

As shown in Figure 3, the p1 face of common key tooth is the shaft section that is parallel to flank of tooth b1, and the p2 face is the end section that is parallel to end face a; And the present invention on corresponding position shaft section and end section is respectively P1 and P2(is not shown).

From as can be known shown in Figure 4, the key increment cross section p2 of common involute splines is involute profile; And the splined end cross section P2 in the utility model chamfered area remains involute profile, and just thickness has reduced (not shown).From as can be known shown in Figure 5, the splined shaft cross section P1 in the chamfered area has formed a little chamfering in the end; And common splined shaft cross section is rectangular cross-section p1, as shown in Figure 6.Described chamfering both can be the straight line chamfering and also can be circular arc chamfering.The benefit of doing like this is, do not need to increase independent chamfering process, can finish as long as make certain modification at the cutter of processing spline, but also have the function of chamfering---be convenient to assembling.

Below to be with a concrete numerical value that example is simply introduced working principle of the present utility model as follows: a pair of spline of interference fit, in the about 2mm scope of the end face B2, the B3 that are pressed into end of external splines, the about 40 μ m of one-sided attenuate transverse tooth thickness.In this section transverse tooth thickness weakened region, the matching relationship of spline becomes Spielpassung by interference fit, as shown in Figure 5.

In the transverse tooth thickness weakened region, the spline of cooperation relies on the artificial strength a bit of length of can packing into, play the effect of guiding, and then working pressure equipment press-fits spline to design attitude.

More than in the narration, " 2mm " and " 40 μ m " be explanation as an example only, can be replaced by any number according to design.

The above only is preferred implementation of the present utility model, it is to be noted, these embodiments only are used for explanation the utility model and are not used in restriction scope of the present utility model, and, after having read content of the present utility model, the relevant technical staff in the field can make various changes or modification to the utility model, and these equivalent form of values fall into the application's appended claims institute restricted portion equally.

Claims

1. an involute outer spline comprises splined shaft and involute key tooth, it is characterized in that, end both sides of described key tooth are provided with chamfered area.

2. involute outer spline according to claim 1 is characterized in that, described chamfered area becomes axisymmetric in key tooth both sides.

3. involute outer spline according to claim 1 is characterized in that, in the described chamfered area, the end section of key tooth bi-side is still involute profile.