CN203146757U - Combination gear - Google Patents

Abstract

A combination gear of an integral structure is combined by multiple spur gears identical in mode number and tooth number. The spur gears are arranged and assembled together by performing difference rotation among teeth by the same angle by taking a center hole as the axis, and then are connected with a gear center shaft through an inner positioning key to form the combination gear.

Description

Built-up gear

One, affiliated technical field

The utility model relates to a kind of same modulus, is combined into an overall structure formula built-up gear with a plurality of spur gear wheels of the number of teeth, belongs to mechanical manufacturing field.

Two, background technique

At present, known cylindrical gears has straight-tooth, helical teeth, herringbone tooth, spur gear load concentration, transmission are not steady, helical gear load distribution uniform, stable drive, bearing capacity is higher, but has axial force to produce when transmission, just adopts herringbone gear in order to eliminate axial force, but herringbone gear processing is difficulty, and precision is lower.

Three, summary of the invention

In order to overcome existing spur gear wheel, cylindric spiral gear, the shortcoming and defect of herringbone gear, the utility model provides a kind of cylindrical gears, and this gear is not only processed simply, and has helical gear transmission stability, do not produce axial force when rotating, noise is little, and bearing capacity is higher.

The technological scheme that its technical problem that solves the utility model adopts is; Be the axle center with the center hole a plurality of same moduluses, with the spur gear wheel of the number of teeth, carry out between tooth and the tooth difference position rotation equal angular and arrange and fit together, link together by key Placement and central gear axis, become the built-up gear of an overall structure formula.

The beneficial effects of the utility model are; Adopt a plurality of spur gear wheels to rotate equal angular relatively, the built-up gear that is assembled into structural formula is arranged in the difference position, its single-piece gear is made simple, easy to assembly, when wherein any single-piece gear damages, can single-piece change this gear in use, overhaul convenient and swift, save material, this built-up gear is adapted at speed reducer and the central use of driving mechanism of large-scale heavy duty lotus.

Four, description of drawings

Below in conjunction with drawings and Examples the utility model is further specified;

Fig. 1. be the front view of the utility model built-up gear.

Fig. 2. be the attached view of the utility model built-up gear.

Among the figure: 1. built-up gear, 2. central gear axis, 3. in positioning key, the 4. shaft shoulder.

Five, embodiment

In the drawings, each gear in the built-up gear (1) is same modulus, the same number of teeth, rotate equal angular between gear and gear, the difference position is arranged and is installed on the central gear axis (2), process keyway at central gear axis (2), each gear in built-up gear (1) processes positioning spline respectively, and built-up gear (1) is to be connected together by interior positioning key (3) and central gear axis (2), and the shaft shoulder (4) plays position-limiting action to built-up gear (1).

Claims (1)

1. a built-up gear is characterized in that; Be the axle center with the center hole with same modulus, with a plurality of spur gear wheels of the number of teeth, carry out between tooth and the tooth difference position rotation equal angular and arrange and fit together, link together by key Placement and central gear axis, become the built-up gear of an overall structure formula.