CN2299192Y

CN2299192Y - Straight, oblique tooth speed variable gearing

Info

Publication number: CN2299192Y
Application number: CN 97247497
Authority: CN
Inventors: 张孟荣
Original assignee: Individual
Current assignee: Individual
Priority date: 1997-10-15
Filing date: 1997-10-15
Publication date: 1998-12-02
Anticipated expiration: 2007-10-15

Abstract

The utility model relates to a straight and skewed tooth speed changing gear which is composed of a straight gear and a skew gear through one-step injection molding. When right and left symmetrical double driving worms work, the skew gear 2 is driven simultaneously, and the skew gear 2 plays the function of a worm wheel at this point. A small straight gear 1 which is coaxial with the worm wheel simultaneously drives a big gear to work under the action of the double driving worms. The rotation area is enlarged, the big gear works more stably and reliably, and the noise is low.

Description

Directly, helical teeth speed change gear

The utility model relates to a kind of straight, helical teeth speed change gear of single injection-molded, is a spur gear and the speed change gear that bevel gear set is synthetic specifically.

Gearbox of the same type for a long time, form by a secondary worm gear and worm screw, produce the axial force of band directivity during gear operation that this worm screw drives, when normal operation, can influence the working state of complete machine, and the adjustment that will overcome this axial force is the comparison difficulty, also malfunctioning easily in practical work process, cause the rate of fault height, the life-span is short and volume is big and shortcomings such as heaviness.

The purpose of this utility model is to avoid above-mentioned deficiency of the prior art, and provides a kind of littler by 30% than original volume, improves the spur gear and the synthetic speed change gear of bevel gear set of gear ratio.

Technical solution of the present utility model:

A kind of straight, helical teeth speed change gear is characterized in that it has a spur gear and a helical gear combination to form.

Advantage of the present utility model:

The mutual balance of axial force made transmission more steady so need not regulating device when 1, rotation direction each symmetrical double driving worm in the left and right sides drove two worm gear work simultaneously.

2, small Spur gear (two of pairs) drives a gearwheel jointly, and drive area is increased, and gearwheel work is more steady reliably, noise is low.

3, owing to compact structure, it is little to take up room, and saves cost 15%, easy to loading and unloading.

4, each symmetrical double driving worm of left and right sides rotation direction drives this drive mechanism of corresponding worm gear, can improve transmission efficiency 25%.

5, advanced design, rational in infrastructure, the transmission efficiency height, rate of fault is low, long service life.

Fig. 1 is the utility model schematic top plan view.

Fig. 2 is the utility model structural representation.

Below in conjunction with accompanying drawing the utility model is further described:

1 is small Spur gear among the figure, the 2nd, helical gear, small Spur gear and helical gear single injection-molded are combined into a speed change gear, when about drive helical gear 2 during each symmetrical double driving worm running simultaneously, this moment, helical gear 2 played the effect of worm gear, drove a gearwheel job simultaneously with the coaxial small Spur gear 1 of worm gear under the effect of worm screw.

Claims

1, a kind of straight, helical teeth speed change gear is characterized in that it has a spur gear and a helical gear combination to form.

2, straight, helical teeth speed change gear according to claim 1 is characterized in that spur gear and helical gear are by the plastics single injection-molded.