CN201090594Y - Internal tooth type splined shaft - Google Patents

Abstract

The utility model discloses an involute castellated shaft with internal teeth, which is used in mechanical connection. The utility model comprises a shaft and a spline with internal teeth; the spline with internal teeth is arranged on the inner wall of a cavity at the head face of the shaft and is integrated with the shaft. The utility model replaces welded teeth with cold-extruded teeth, thus reducing material consumption and saving cost. Since the utility model is processed with no cutting treatment, the head faces of the teeth are of high degree of roughness, thus increasing the contact strength of the head faces of the teeth.

Description

A kind of inner tooth type splined shaft

Technical field

The utility model relates to a kind of involute splined shaft that is used for mechanical coupling, particularly a kind of inner tooth type splined shaft.

Background technique

The involute internal spline connection of using at present and the output shaft of various mechanical coupling adopt a broaching processing back and a form of welding more, shown in Fig. 1 structural drawing, the left end limit of axle 1 is designed to boss, axle 2 is axles of the band internal spline 3 of formation after broaching processing, the right-hand member limit of axle 2 is designed to the corresponding concave station of left end boss with axle 1, will just form the inner tooth type splined shaft after axle 1 and axle 2 firm welding.Its shortcoming of inner tooth type splined shaft of this structure is: 1, steel fiber transversely cutting in the broaching process of axle 2, and mechanical strength is influenced; 2, the connection of weld is prone to fracture.

Summary of the invention

The utility model provides a kind of well-set inner tooth type splined shaft for overcoming the deficiencies in the prior art.

The technical solution adopted in the utility model is: be made up of axle and internal spline, internal spline designs on the end face internal chamber wall of axle, with axle be monolithic construction.

Profile of tooth of the present utility model directly adopts cold hobbing to replace welded structure to be shaped, and reduces the consumption of material, and is cost-saved; Because no cutting, the tooth-face roughness height can improve contact strength of tooth surface.

Description of drawings

Below in conjunction with the drawings and specific embodiments the utility model is described in further detail.

Fig. 1 is the prior art constructions sectional view;

Fig. 2 is the left view of Fig. 1;

Fig. 3 is a structure sectional view of the present utility model;

Fig. 4 is the left view of Fig. 3.

Embodiment:

Shown in Fig. 3,4, internal spline 3 design on the internal chamber wall of the end face part of axle 1, with axle 1 be monolithic construction.When processing, internal spline 3 directly adopts the technological method processing of cold-extruded last item 1, and metal fibrous tissue flows along the direction of extrusion, and mechanical strength is higher; Squeeze tooth again after the pre-extruding of manufacturing process employing, the distortion in the time of can reducing the cold hobbing profile of tooth reaches the profile accuracy that broaching is processed; Tooth portion and axis body are the process procedure that monolithic construction reduces course of working, reduce production costs, and adopt the cold-stamped process form to replace welded structure, and tooth portion directly makes with the cold hobbing form.

Claims (1)

1. inner tooth type splined shaft has axle (1) and internal spline (3) composition, and it is characterized in that: described internal spline (3) designs on the end face internal chamber wall of axle (1), with axle (1) be monolithic construction.

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