CN2512948Y

CN2512948Y - Double flexible driving device

Info

Publication number: CN2512948Y
Application number: CN 01249373
Authority: CN
Inventors: 周良墉; 孙一峰
Original assignee: Xiangtan Iron And Steel Group Co ltd
Current assignee: Xiangtan Iron And Steel Group Co ltd
Priority date: 2001-07-27
Filing date: 2001-07-27
Publication date: 2002-09-25
Anticipated expiration: 2011-07-27

Abstract

The utility model relates to a double flexible driving device and relates to the mechanical driving device, in particular to a double flexible driving device used for the mechanical driving. The utility model is mainly used for further simplifying the structure of the flexible driving device, shortening the cubage of the driving device and realizing the driving with big driving rate by using the two grades driving. The technical proposals of the utility model are that: a first grade worm[1] which is connected with the power source is joggled with a first grade worm wheel[2] which is sleeved on one end of a second worm[3], and a second worm wheel[4] as the power outputting wheel is joggled with the second grade worm[3]. The first grade worm[1] and the second grade worm[3] are all the plane enveloping worms, namely the reference surfaces of the worms are round annuluses, the two grade planes secondary enveloping worms are the assistant tandem operations, the second grade worm[4] is directly arranged on a main axis[5] of the working mechanism, and the power is transmitted to the main axis[5] of the working mechanism by the second grade worm[4] after being decelerated and provides power to the working machine. The utility model exploits the new field of the flexible driving and has wide application prospect in the mechanical driving field.

Description

The double planar flexible gearing

Technical field: the utility model relates to a kind of mechanical transmission, particularly a kind ofly is used for mechanically operated flexible gearing.

Background technique: flexible transmission is a kind of integral or half transmission device that hangs, and its driving mechanism is all or part of to be directly installed on the main shaft of working machine, and by compliant mechanism moment of torsion is passed to the basis.Flexiblesystem can be realized the multiple spot engagement, thereby improves the bearing capacity of system greatly.Advantages such as flexible transmission has compact structure, and transmission is stable, and stress condition is good are used widely in big-and-middle-sized low-speed heave-load machinery.Common flexible gearing adopts Involutes Gears Transmission more, and what have also that the first order therein adopted worm drive (comprising the planar double enveloping worm transmission) partly hangs flexiblesystem.Planar double-enveloping worm transmission (hereinafter to be referred as flat secondary) is a kind of worm drive of excellent performance, and it is bigger than normal cylindrical worm gear drive bearing capacity, the transmission efficiency height.Its efficient is very approaching with the Involutes Gears Transmission of same velocity ratio.

Summary of the invention: the purpose of this utility model is to provide the double planar flexible gearing that a kind of more compact structure, volume are littler, realize big speed ratio with the two-stage transmission.The purpose of this utility model is achieved through the following technical solutions: the integral formula flexible gearing that it adopts the two-stage planar double-enveloping toroid worm gear to form, first order worm screw 1 of joining with power source and the first order worm gear that is sleeved on second level worm screw 3 one ends 2 engagements are meshed with second level worm screw 3 as the second level worm gear 4 of power output wheel.First order worm screw 1 and second level worm screw 3 all can be adopted planar double enveloping worm, and promptly the reference surface of worm screw is a toroidal surface, the series connection of two-stage planar double-enveloping toroid worm gear.Described double planar flexible gearing also can adopt the integral formula kind of drive, and second level worm gear 4 directly is contained on the main shaft 5 of operation mechanism, and power provides power by the main shaft 5 that second level worm gear 4 is defeated by operation mechanism to working machine behind double reduction.According to the real work situation of device, can adopt 1-4 first order worm gear pair and 1 second level worm gear pair to realize the multiple spot engagement.

Planar double-enveloping worm is to be the pitch circle face with the toroidal surface, is the envelope generatrix with the plane.Because its special construction and forming principle make it have multiple tooth two-wire contact, form the good advantage of dynamic pressure oil film condition.It is than the transmission efficiency height of normal cylindrical worm gear, and bearing capacity is big, thereby more compact structure.Flat secondary transmission efficiency is near the Involutes Gears Transmission of same velocity ratio, and it is low to have broken Efficiency of Worm Gearing, and bearing capacity is little, the outdated ideas that working life is short.To equal pair and be applied to flexible transmission system, can bring into play the common strong point of flat pair and flexiblesystem more fully.

Description of drawings:

Fig. 1 is a structural representation of the present utility model;

Fig. 2 is embodiment 2 a structural representation;

Fig. 3 is embodiment 3 a structural representation.

Embodiment:

Embodiment 1, as shown in Figure 1, the utility model is made up of the two-stage transmission, promptly is composed in series by the two-stage planar double-enveloping toroid worm gear, the double planar flexible gearing adopts fully-mounted flexible type of belt drive, and each level adopts planar double enveloping worm and worm gear.Power source is imported into by the flat pair of the first order (level at a high speed), drives second level worm screw 3 by first order worm gear 2 and rotates.Driving second level worm gear 4 by second level worm screw 3 again rotates.Second level worm gear 4 directly is contained on the main shaft 5 of operation mechanism, and power is by second level worm gear 4 output, and power source is passed to working machine with power after by double reduction.First order worm screw 2 pairs are held correct relative by casing and second level worm screw 3 collaterals.One of advantage of flexible transmission can realize the multiple spot engagement exactly, the bearing capacity of the flexible transmission of multiple spot engagement can increasing.

Embodiment 2, and as shown in Figure 2, according to the real work situation, the second-stage worm gear worm gear pair is meshed with two first-stage worm gear worm gear pairs of symmetry, realizes the two point engagement.

Embodiment 3, and as shown in Figure 3, according to the real work situation, second-stage worm gear is meshed with four one-level worm gear pairs, realize the multiple spot engagement.

The double planar flexible transmission system is simpler than the gentle part system architecture of common involute gear, and velocity ratio is bigger, and the second-stage worm pair can be the multiple spot engagement, also can be the single-point engagement.Two stage gear ratios just can reach more than 4000.This reduces cost for reducing weight of equipment, and it is very useful reducing the occupation of land space.At present, all adopt flat pair to do flexible transmission and do not see precedent in practice as yet, the double planar flexible apparatus has been opened up the frontier of flexible transmission, has a wide range of applications in mechanical transmission fields.We are in the transformation of Hunan steel two steel works tundish roll-over tables, and the pair of will putting down of creating part is applied to switching mechanism, invent and designed integral " double planar soften part transmission system ", have reached and have reduced investment, utilize original base, reduce the purpose in occupation of land space.

Claims

1, a kind of double planar flexible gearing, it is characterized in that: first order worm screw [1] of joining with power source and first order worm gear [2] engagement that is sleeved on second level worm screw [3] one ends are meshed with second level worm screw [3] as the second level worm gear [4] of power output wheel.

2, according to the described double planar flexible gearing of claim 1, it is characterized in that: first order worm screw [1] and second level worm screw [3] are planar double enveloping worm, and promptly the reference surface of worm screw is a toroidal surface, the series connection of two-stage planar double-enveloping toroid worm gear.

3, according to claim 1 or 2 described double planar flexible gearings, it is characterized in that: described double planar flexible gearing is an integral formula transmission device, second level worm gear [4] directly is contained on the main shaft [5] of operation mechanism, and power provides power by the main shaft [5] that second level worm gear [4] is defeated by operation mechanism to working machine behind double reduction.

4, according to the described double planar flexible gearing of claim 1, it is characterized in that: 1-4 first order worm gear pair and 1 second level worm gear pair engagement.