CN2110743U

CN2110743U - Speed reducer transmitted by harmonic chain

Info

Publication number: CN2110743U
Application number: CN 91216903
Authority: CN
Inventors: 谢汉波
Original assignee: Individual
Current assignee: Individual
Priority date: 1991-06-28
Filing date: 1991-06-28
Publication date: 1992-07-22

Abstract

The utility model relates to a speed reducer driven by harmonic chains, which belongs to a mechanical driving mechanism. The utility model adopts the theory of harmonic chain transmission, and uses a wave generator (1) to impulse a flexible intermediate member (2) to do movements on a rigid wheel (3) to drive a central wheel (4) to rotate. The utility model overcomes the drawbacks of the easy fatigue and easy damage of a flexible gear in a harmonic gear speed reducer, and improves the service life and the safety of the flexible gear. The utility model also causes a driving leading device to be very simple, and the energy loss is small. The utility model is suitable for various situations with high-power transmission, or is suitable for accurate mechanical transmission devices with small volume and the request of high transmission accuracy and efficiency.

Description

Speed reducer transmitted by harmonic chain

Harmonic wave chain belt gearing speed-reducer belongs to mechanical transmission mechanism.

At present, Harmonic Gears is a kind of newer driving mechanism that uses both at home and abroad, be applied to various increasing, retarder, compare with other gear-shift transmission, it has in light weight, gear range is big, transmission accuracy and efficient are all than advantages such as height, but also there is unsurmountable shortcoming simultaneously, be one of its critical component---flexbile gear, because of repeated deformation causes problem of fatigue damage, especially in high-power retarder application facet, the fatigue ruption of flexbile gear is seriously threatening the Security of using, and flexbile gear is to the performance requirement height of material, difficulty of processing is big, so the cost height; Also draw difficulty in addition, need bigger shortcomings such as axial dimension because of the power of flexbile gear.

In order to overcome above-mentioned shortcoming, the utility model has been realized the new type speed reducer of a kind of harmonic wave chain (or toothed belt) transmission, and its driving mechanism is that harmonic wave chain tape handler adopts the flexbile gear in chain (or toothed belt) and the central gear replacement Harmonic Gears.

The utility model mainly is made up of movement and housing.The basic building block of forming movement is as shown in Figure 1:

1---wave-generator, 2---flexible intermediate member, 3---just take turns 4---central gear.

Wave-generator (1) can be the cam that two ends have smooth curve, as oval or semicircle; It also can be the roller that can form major and minor axis.Flexible intermediate member (2) is Transmitted chains or driving belt, as bush roller chain or toothed belt.Just wheel (3) is internal gear or internal tooth form sprocket wheel (or belt wheel).Central gear (4) is external gear or external tooth form sprocket wheel (or belt wheel).

Flexible intermediate member (2) outside is meshed with just taking turns (3), and the inboard is meshed with central gear (4), contacts with wave-generator (1) simultaneously.Central gear (4) connects mutually with output shaft (5).Therefore formed the transmission of harmonic wave chain belt.This change is compared with former Harmonic Gears, because the flexbile gear that does not adopt elastic material to make, there is not the problem of flexbile gear fatigue ruption in it on the one hand, the transmission derivation mechanism of flexbile gear is become simply, compact, volume is little, and it has also inherited other advantage of Harmonic Gears.

Harmonic wave chain belt transmission principle is: under the effect of the mechanical wave that harmonic generator produces, by flexible intermediate member (Transmitted chains or driving belt) motion and transmission of power are had on the firm wheel and central gear of certain number of teeth difference, thereby can be realized the gear ratio transmission.Though the motion of the flexbile gear in the motion of flexible intermediate member and the harmonic gear is very similar, but their motion has basic difference: the flexbile gear in the harmonic gear reducer is the basic building block that motion inputs or outputs, and its rotational velocity directly influences the speed ratio of entire mechanism; Transmitted chains in the harmonic wave chain belt retarder or driving belt then are important intermediate members, and the rotating speed of itself does not directly influence the speed ratio of entire mechanism.

Harmonic wave chain belt gearing speed-reducer embodiment is as shown in the figure: Fig. 1 is the utility model schematic diagram of mechanism, and Fig. 2 is the schematic representation of the utility model typical mechanism, and Fig. 3 is the erection drawing of present embodiment.Wherein:

1---wave-generator; 2---flexible intermediate member; 3---just take turns; 4---central gear;

5---output shaft; 6---input shaft; 7---housing; 8---end cap.

In Fig. 3, what connect mutually with wave launcher (1) is input shaft (6), and what connect mutually with central gear (4) is output shaft (5).When wave-generator (1) promotes bush roller chain (2) and just wheel (3) is when being meshed counterclockwise at long axis direction, bush roller chain (2) will be done clockwise by drive and move; Meanwhile, the central gear (4) that is meshed with bush roller chain (2) on short-axis direction also will be done by drive and clockwise rotate.Because the linear velocity of each point is all identical on bush roller chain (2) pitch curve, and the Pitch radius of firm wheel (3) that is meshed with bush roller chain (2) and central gear (4) is inequality, so, if fixing wheel (3) just, rotational wave generator (1), then central gear (4) rotates by a certain angular velocity, will move by output shaft (5) and power output again.

Chain that present embodiment is used and sprocket wheel all are motorcycle accessoriess, and just wheel, wave-generator, axle, housing etc. are Design and Machining voluntarily, and material is 45 steel and cast iron, retarder employing flooding system lubrication.

Harmonic wave chain belt gearing speed-reducer can be designed to two types: a class is a harmonic wave chain reduction device, is applicable to the occasion of transferring power, as hoist, winch, large automobile with retarder etc.; Another kind of is harmonic wave toothed belt retarder, is applicable to the occasion of transmitting movement, as the retarder of various precision optical machineries, it has higher transmission accuracy and efficient.Generally speaking, harmonic wave chain belt gearing speed-reducer has bigger velocity ratio, and it is simple in structure, compact, under the volume, in light weight, easy to manufacture, cost is low, easy to maintenance, therefore, it of many uses.

Claims

1, harmonic wave chain belt gearing speed-reducer, this retarder is made up of movement and housing etc., as wave-generator (1), just taken turns (3), input shaft (6), input shaft (6) connects mutually with wave-generator (1), it is characterized in that: flexible intermediate member (2) and central gear (4) are the movement main member, flexible intermediate member (2) is a Transmitted chains, central gear (4) is the external tooth form sprocket wheel, and flexible intermediate member (2) outside is meshed with just taking turns (3), and the inboard is meshed with central gear (4), it also contacts with wave-generator (1) simultaneously, and central gear (4) connects mutually with output shaft (5).

2, harmonic wave chain belt gearing speed-reducer according to claim 1, it is characterized in that: flexible intermediate member (2) is a driving belt, and central gear (4) is the external tooth form belt wheel, and just wheel (3) is the internal tooth form belt wheel that is meshed with flexible intermediate member (2).

3, harmonic wave chain belt gearing speed-reducer according to claim 1, it is characterized in that: flexible intermediate member (2) is a bush roller chain.

4, harmonic wave chain belt gearing speed-reducer according to claim 1, it is characterized in that: flexible intermediate member (2) is a toothed belt.