CN205226245U

CN205226245U - Gear drive reduction gear

Info

Publication number: CN205226245U
Application number: CN201520956588.8U
Authority: CN
Inventors: 黎涛; 陈伟; 封莉
Original assignee: QIJIANG COUNTY SANCHUAN GEAR CO Ltd
Current assignee: QIJIANG COUNTY SANCHUAN GEAR CO Ltd
Priority date: 2015-11-26
Filing date: 2015-11-26
Publication date: 2016-05-11
Anticipated expiration: 2025-11-26

Abstract

The utility model provides a gear drive reduction gear, including an internal gear, the 2nd internal gear, harmonic generation ware and external tooth gear, be provided with first internal tooth on the internal gear, be provided with the second internal tooth on the 2nd internal gear, be provided with the cylinder on the external tooth gear, the outer peripheral face of cylinder is provided with first external tooth and second external tooth, the number of teeth of first external tooth and second external tooth is different, the harmonic generation ware is the inner peripheral surface that imbeds the cylinder of external tooth gear, with the external tooth gear ovalisation of buckling, first internal tooth and first external tooth are in the meshing of the both ends position of the major axis of external tooth gear, second internal tooth and second external tooth are also in the both ends position meshing of the major axis of external tooth gear, the number of teeth of first internal tooth is different from the number of teeth of first external tooth, the number of teeth of second internal tooth is different from the number of teeth of second external tooth. The utility model discloses simple structure, simple to operate, it is high to set for the velocity ratio degree of freedom, has increased gear drive reduction gear's application scope, can realize easily that low -speed compares, is applicable to low -speed than the situation that requires.

Description

Gear transmission reducing device

Technical field

The utility model relates to a kind of gearing, particularly relates to a kind of gear transmission reducing device.

Background technique

Gear transmission can be used for slowing down and also can be used for accelerating, and wherein common speed reducer is exactly harmonic drive speed reducer, because can produce larger reduction speed ratio, structure is simple, and number of components is few, easy for installation, is thus widely used.But the external tooth gear of general Harmonic Drive Reducer directly engages with Stationary side internal-gear and driving side internal-gear, again due to the mechanical property of gear transmission itself, the degrees of freedom of general harmonic gear setting speed ratio is not high, thus generally speaking, the speed ratio of common harmonic gear needs to be set in more than 50, extremely difficulty is applicable to the speed ratio of less than 35, and so common Harmonic Drive Reducer just can not be applicable to the situation of low speed ratio.

Therefore those skilled in the art to be devoted to research and development setting speed ratio degrees of freedom high and can realize low speed easily than gear transmission reducing device.

Model utility content

Because the above-mentioned defect of prior art, it is high and can realize low speed easily than gear transmission reducing device that technical problem to be solved in the utility model is to provide a kind of setting speed ratio degrees of freedom.

For achieving the above object, the utility model provides a kind of gear transmission reducing device, comprise the first internal-gear, second internal-gear, harmonic generator and external tooth gear, first internal-gear is provided with the first internal tooth, second internal-gear is provided with the second internal tooth, described external tooth gear is provided with cylindrical body, the outer circumferential face of described cylindrical body is provided with the first external tooth and the second external tooth, described first external tooth is meshed with described first internal tooth, described second external tooth and the second internal tooth are meshed, described first external tooth is different with the number of teeth of the second external tooth, described harmonic generator is the inner peripheral surface of the cylindrical body embedding external tooth gear, external tooth gear is bent into ellipse, described first internal tooth engages with the two-end part of the first external tooth at the major axis of external tooth gear, described second internal tooth also engages at the two-end part of the major axis of external tooth gear with the second external tooth, the number of teeth of described first internal tooth is different from the number of teeth of the first external tooth, the number of teeth of described second internal tooth is different from the number of teeth of the second external tooth.

In order to harmonic generator better coordinates rotation with external tooth gear, described harmonic generator comprises the rigidity connector of cartouche, the waveform bearing in the elliptical periphery face of the rigidity connector of described cartouche, described waveform bearing have can bend towards radial direction in the ball bearing of foreign steamer.

The beneficial effects of the utility model are: the utility model structure is simple, easy for installation, and setting speed ratio degrees of freedom is high, thus greatly increases the Applicable scope of gear transmission reducing device, can realize low speed ratio easily, thus be applicable to low speed than the situation required.

Accompanying drawing explanation

Fig. 1 is the structural representation of the utility model one embodiment.

Fig. 2 is the plan structure schematic diagram of Fig. 1.

Fig. 3 is the partial enlargement structural representation at the I place of Fig. 1.

Embodiment

Below in conjunction with drawings and Examples, the utility model is described in further detail:

As shown in Figures 1 to 3, a kind of gear transmission reducing device, comprise the first internal-gear 1, second internal-gear 2, harmonic generator 5 and external tooth gear 3, first internal-gear 1 is provided with the first internal tooth 1a, its number of teeth is Z1, second internal-gear 2 is provided with the second internal tooth 2a, its number of teeth is Z2, external tooth gear 3 is provided with cylindrical body 4, the outer circumferential face of cylindrical body 4 is provided with the first external tooth 3a and the second external tooth 3b, first external tooth 3a is different with the number of teeth of the second external tooth 3b, first external tooth 3a is in the circular circumference face of cylindrical body 4, be formed at the side of axis L, its number of teeth is Z3, second external tooth 3b is then at the opposite side of axis L, its number of teeth is Z4, first external tooth 3a is meshed with the first internal tooth 1a, second external tooth 3b and the second internal tooth 2a is meshed.

Harmonic generator 5 is the inner peripheral surfaces of the cylindrical body 4 embedding external tooth gear 3, external tooth gear 3 is bent into ellipse, first internal tooth 1a engages at the two-end part of the major axis of external tooth gear 3 with the first external tooth 3a, second internal tooth 2a also engages at the two-end part of the major axis of external tooth gear 3 with the second external tooth 3b, ensure that harmonic generator is better fixed on harmonic gear with this, so that the input rotated.

The number of teeth of the first internal tooth 1a is different from the number of teeth of the first external tooth 3a, there is the effect expanding speed ratio setting range like this, in order to ensure the setting of little speed ratio, the number of teeth of usual second internal tooth 2a is different from the number of teeth of the second external tooth 3b, the number of teeth of the first internal tooth 1a is greater than the number of teeth of the first external tooth 3a, and the number of teeth of the second internal tooth 2a is less than the number of teeth of the second external tooth 3b.

Harmonic generator 5 comprises the rigidity connector 6 of cartouche, the waveform bearing 7 in the elliptical periphery face of the rigidity connector 6 of cartouche, waveform bearing 7 have can bend towards radial direction in the ball bearing of foreign steamer, ensure that harmonic generator better coordinates rotation with external tooth gear with this.

First internal-gear 1 is set to fixing non-rotary Stationary side internal-gear, second internal-gear 2 is set to export the driving side internal-gear rotated, minimum gap is there is between first internal-gear 1 and the second internal-gear 2, and two gears are configured in the direction of central axis L side by side, ensure better the rotation after change to be exported with this.

When harmonic generator 5 rotates to the input of gear transmission reducing device, external tooth gear 3 is bent into ellipse, first internal tooth 1a engages at the two-end part of the major axis of external tooth gear 3 with the first external tooth 3a, second internal tooth 2a also engages at the two-end part of the major axis of external tooth gear 3 with the second external tooth 3b, now the ratio of the external tooth gear 3 of the first internal-gear 1 and the first external tooth 3a is R1, the ratio of the external tooth gear of the second internal-gear 2 and the second external tooth 3b is R2, and input rotates and the speed ratio of output swing pinion is R.

That is: R1=1/{ (Z3-Z1)/Z3};

R2＝1/{(Z4-Z2)/Z4}；

R＝(R1.R2-R1)/(-R1+R2)；

Change former input by above-mentioned principle to rotate, second internal-gear 2 that is rotated through after change exports, and just can draw different speed ratios by the adjustment number of teeth, thus the setting range of speed ratio is comparatively wide, wherein also comprises the situation of low speed ratio.Such as, set each number of teeth and be respectively Z1=64; Z2=60; Z3=62; Z4=64, carries it into R1=1/{ (Z3-Z1)/Z3}; R2=1/{ (Z4-Z2)/Z4}; In R=(R1.R2-R1)/(-R1+R2) three formula, can draw R=-15.2, negative sign wherein represents that exporting sense of rotation with input sense of rotation is opposite direction.

More than describe preferred embodiment of the present utility model in detail.Should be appreciated that those of ordinary skill in the art just can make many modifications and variations according to design of the present utility model without the need to creative work.Therefore, all technician in the art according to design of the present utility model on the basis of existing technology by the available technological scheme of logical analysis, reasoning, or a limited experiment, all should by the determined protection domain of claims.

Claims

1. a gear transmission reducing device, comprise the first internal-gear (1), the second internal-gear (2), harmonic generator (5) and external tooth gear (3), first internal-gear (1) is provided with the first internal tooth (1a), second internal-gear (2) is provided with the second internal tooth (2a), it is characterized in that: described external tooth gear (3) is provided with cylindrical body (4); The outer circumferential face of described cylindrical body (4) is provided with the first external tooth (3a) and the second external tooth (3b); Described first external tooth (3a) is meshed with described first internal tooth (1a); Described second external tooth (3b) and the second internal tooth (2a) are meshed; Described first external tooth (3a) is different with the number of teeth of the second external tooth (3b); Described harmonic generator (5) is the inner peripheral surface of the cylindrical body (4) embedding external tooth gear (3), and external tooth gear (3) is bent into ellipse; Described first internal tooth (1a) is engaged with the two-end part of the first external tooth (3a) at the major axis of external tooth gear (3); Described second internal tooth (2a) is also engaged at the two-end part of the major axis of external tooth gear (3) with the second external tooth (3b); The number of teeth of described first internal tooth (1a) is different from the number of teeth of the first external tooth (3a); The number of teeth of described second internal tooth (2a) is different from the number of teeth of the second external tooth (3b).

2. gear transmission reducing device as claimed in claim 1, is characterized in that: described harmonic generator (5) comprises the rigidity connector (6) of cartouche; The waveform bearing (7) in the elliptical periphery face of the rigidity connector (6) of described cartouche; Described waveform bearing (7) have can bend towards radial direction in the ball bearing of foreign steamer.