CN201386772Y - Tractor front drive axle taper gear pair - Google Patents

Abstract

The utility model discloses a tractor front drive axle taper gear pair which comprises a driving taper gear and a driven taper gear. The tractor front drive axle taper gear pair increases pitch diameters of a driving wheel and a driven wheel, thereby achieving the effects of enlarging the end surface modulus and increasing the tooth width, simultaneously, the full tooth depth of wheel teeth can be increased, the working tooth height can be increased, the transmission can be more stable through increasing the superposition coefficient, simultaneously, the contact stress can be lowered, furthermore, the carburized layer depth of gears can be adjusted, thereby, the product abradability can be improved, the purpose of prolonging the product service life can be achieved, and the noise can be lowered simultaneously.

Description

Tractor front drive axle cone gear pair

Technical field

The utility model relates to the vehicle transmission field of components, particularly a kind of tractor front drive axle cone gear pair.

Background technique

Along with the progress of science and technology and the development of society, farm mechanization obtains further popularizing, the tractor of the big-and-middle horsepower of China almost is import entirely in one's early years, in recent years, maturation along with a collection of domestic manufacturing enterprise, the nationalization level of production of tractor front drive axle obtains bigger raising, has also emerged a collection of new product.

Hypoid cone gear spoke is one of essential parts of tractor, but the gear teeth of existing product calculate the change transverse stress and contact stress is bigger than normal, add the complicated topographical conditions in area, China mountain area, thereby cause the easy premature wear of this kind gear pair, working life is not high, long-term frequent replacing not only causes bigger inconvenience to the user, has also caused bigger economic loss simultaneously; In addition, also there is the higher problem of noise in this kind product in application.

The model utility content

In view of this, the utility model provides a kind of tractor front drive axle cone gear pair, to overcome the deficiency that existing product exists.

The purpose of this utility model provides a kind of tractor front drive axle cone gear pair, comprises drive bevel gear and driven wheel of differential, and its tooth portion parameter is:

The standard pitch diameter d of described drive bevel gear is φ 51～52mm; Addendum is 7～7.5mm; Whole depth is 10～11mm; Its helix angle is 29 °～30 °;

The standard pitch diameter φ 221～223mm of described driven wheel of differential; Whole depth is 10～11mm; Addendum is 2～2.5mm;

The tooth profile parameter of gear pair is:

Sideshake is 0.15～0.20mm; Working depth is 9～10mm.

Further, the facewidth of described drive bevel gear is 10～10.5mm; The facewidth of described driven wheel of differential is 3.8～4.2mm;

Further, the standard pitch diameter d of described drive bevel gear is φ 51.21mm; Addendum is 7.35mm; Whole depth is 10.43mm; The facewidth is 10.14mm; Its helix angle be 29 ° 26 ';

The standard pitch diameter φ 221.91mm of described driven wheel of differential; Whole depth is 10.43mm; Addendum is 2.13mm; The facewidth is 4.1mm;

The tooth profile parameter of gear pair is:

Sideshake 0.15mm; Working depth is 9.48mm;

Further, described drive bevel gear and driven wheel of differential are provided with carburized case, and described case depth is 1～1.6mm.

The beneficial effects of the utility model are:

1. the utility model has increased the standard pitch diameter of master and slave trailing wheel, thereby reach transverse module is increased, the effect that the facewidth increases, the full-depth tooth that has increased the gear teeth simultaneously is dark, increased Working depth, made transmission more steady, contact stress is descended by increasing overlap coefficient;

2. the carburized layer depth of gear is adjusted, thereby improved the wear resistance of product, reached and prolong the product purpose in working life, reduced noise simultaneously.

Other advantages of the present utility model, target, to set forth in the following description to a certain extent with feature, and to a certain extent, based on being conspicuous to those skilled in the art, perhaps can from practice of the present utility model, obtain instruction to investigating hereinafter.Target of the present utility model and other advantages can realize and obtain by following specification and claims.

Description of drawings

In order to make the purpose of this utility model, technological scheme and advantage clearer, below in conjunction with accompanying drawing the utility model is described in further detail, wherein:

Fig. 1 is the structural representation of drive bevel gear;

Fig. 2 is the structural representation of driven wheel of differential;

Fig. 3 is the carburized case schematic representation.

Embodiment

Hereinafter with reference to accompanying drawing, preferred embodiment of the present utility model is described in detail.Should be appreciated that preferred embodiment only for the utility model is described, rather than in order to limit protection domain of the present utility model.

Embodiment one

As depicted in figs. 1 and 2, tractor front drive axle cone gear pair of the present utility model comprises drive bevel gear and driven wheel of differential, and its tooth portion parameter is:

The standard pitch diameter d of drive bevel gear is φ 51.21mm; Addendum is 7.35mm; Whole depth is 10.43mm; The facewidth is 10.14mm; Its helix angle be 29 ° 26 ';

The standard pitch diameter φ 221.91mm of driven wheel of differential; Whole depth is 10.43mm; Addendum is 2.13mm; The facewidth is 4.1mm;

The tooth profile parameter of gear pair is:

Sideshake 0.15mm; Working depth is 9.48mm.

As shown in Figure 3, for further improving wear resistance, drive bevel gear and driven wheel of differential are provided with carburized case 1, and the thickness of described carburized case 1 is 1.2mm.

For increasing the working life of the gear teeth, the utility model has also adopted stress shot blasting technology that the flank of tooth is handled, and carries out gear lapping, thereby makes the product operation more steady, and noise is lower.

Embodiment two

The standard pitch diameter d of drive bevel gear is φ 51mm; Addendum is 7mm; Whole depth is 10mm; The facewidth is 10mm; Its helix angle is 29;

The standard pitch diameter φ 221mm of described driven wheel of differential; Whole depth is 10mm; Addendum is 2mm; The facewidth is 3.8mm;

The tooth profile parameter of gear pair is:

Sideshake is 0.15mm; Working depth is 9mm.

The thickness of carburized case 1 is 1mm.

Embodiment three

The standard pitch diameter d of drive bevel gear is φ 52mm; Addendum is 7.5mm; Whole depth is 11mm; The facewidth is 10.5mm; Its helix angle is 30 °;

The standard pitch diameter φ 223mm of described driven wheel of differential; Whole depth is 11mm; Addendum is 2.5mm; The facewidth is 4.2mm;

The tooth profile parameter of gear pair is:

Sideshake is 0.20mm; Working depth is 10mm.

The thickness of carburized case 1 is 1.6mm.

The utility model and intrinsic contrast form are as follows:

Table one (unit: mm)

Parameter name	Former design	The design
			The follower standard pitch diameter	50.23	51～52
The follower facewidth	3.8～4.2	3.8～4.2
			The driving wheel standard pitch diameter	220	221～223
The driving wheel helix angle	28°26′	29°～30°
			The driving wheel facewidth	10～10.5	10～10.5
Working depth	8～9	9～10

Through testing surface, the domestic steyr automobile drive axle bevel gear stand life test that adopts this product is from 3 * 10 ⁵Inferiorly increased by 5.45 * 10 ⁵Inferior, its improvement effect is very significant.

Explanation is at last, above embodiment is only unrestricted in order to the explanation the technical solution of the utility model, although the utility model is had been described in detail with reference to preferred embodiment, those of ordinary skill in the art is to be understood that, can make amendment or be equal to replacement the technical solution of the utility model, and not breaking away from the aim and the scope of the technical program, it all should be encompassed in the middle of the claim scope of the present utility model.

Claims (4)

1. tractor front drive axle cone gear pair comprises drive bevel gear and driven wheel of differential, it is characterized in that: its tooth portion parameter is:

The standard pitch diameter d of described drive bevel gear is φ 51～52mm; Addendum is 7～7.5mm; Whole depth is 10～11mm; Its helix angle is 29 °～30 °;

The standard pitch diameter φ 221～223mm of described driven wheel of differential; Whole depth is 10～11mm; Addendum is 2～2.5mm;

The tooth profile parameter of gear pair is:

Sideshake is 0.15～0.20mm; Working depth is 9～10mm.

2. tractor front drive axle cone gear pair according to claim 1, it is characterized in that: the facewidth of described drive bevel gear is 10～10.5mm; The facewidth of described driven wheel of differential is 3.8～4.2mm.

3. tractor front drive axle cone gear pair according to claim 2, it is characterized in that: the standard pitch diameter d of described drive bevel gear is φ 51.21mm; Addendum is 7.35mm; Whole depth is 10.43mm; The facewidth is 10.14mm; Its helix angle be 29 ° 26 ';

The standard pitch diameter φ 221.91mm of described driven wheel of differential; Whole depth is 10.43mm; Addendum is 2.13mm; The facewidth is 4.1mm;

The tooth profile parameter of gear pair is:

Sideshake 0.15mm; Working depth is 9.48mm.

4. tractor front drive axle cone gear pair according to claim 1, it is characterized in that: described drive bevel gear and driven wheel of differential are provided with carburized case (1), and the thickness of described carburized case (1) is 1～1.6mm.

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