CN102878250A

CN102878250A - Planet gear reducer

Info

Publication number: CN102878250A
Application number: CN2012103746096A
Authority: CN
Inventors: 江建斌; 江建敏; 关放柳
Original assignee: TAIZHOU SANKAI MECHANICAL AND ELECTRICAL CO Ltd
Current assignee: ZHEJIANG SANKAI MECHANICAL AND ELECTRICAL CO., LTD.
Priority date: 2012-09-25
Filing date: 2012-09-25
Publication date: 2013-01-16
Anticipated expiration: 2032-09-25
Also published as: CN102878250B

Abstract

The invention provides a planet gear reducer, belongs to the technical field of machinery, and solves the problem that transmission precision of the existing planet gear reducer is reduced due to abrasion of the planet gear reducer after long-term operation. The planet gear reducer comprises an output planet carrier, an inner gear ring, a sun gear A, a sun gear B and a plurality sets of planet gear structures. Each set of planet gear structure comprises a planet gear shaft, a planet gear A and a planet gear B. The sun gear A and the sun gear B are provided with a spline A and a spline B respectively. Both the spline A and the spline B are provided with a plurality of connecting ends. A gap is reserved between each two adjacent connecting ends. Each connecting end is provided with a helical surface with a helical angle alpha. The sun gear A is provided with a first inner hole. A pressure spring is mounted in the first inner hole. The planet gear reducer is capable of compensating abrasion so as to improve transmission precision.

Description

A kind of planet-gear speed reducer

Technical field

The invention belongs to field of mechanical technique, relate to a kind of planet-gear speed reducer.

Background technique

Along with making constant progress of science and technology, a large amount of of numerical control machine tool popularize, and are also more and more higher to the requirement of speed reducer precision.Improving at present the speed reducer precision generally is to process first high-precision part these high-precision parts to be installed the high-precision speed reducer of formation again, is divided into " ultraprecise arm gap, accurate arm gap, standard arm gap ".But the method for this raising speed reducer precision also exists some problems: the one, and the required precision of its part is high, and difficulty of processing is very large, and processing cost is also high; The 2nd, even be assembled into high-precision speed reducer by the high-precision part that processes, but this high-precision part can produce wearing and tearing after long-term the use, and precision is reduced, thereby causes whole speed reducer running accuracy to reduce.

Summary of the invention

The objective of the invention is to have the problems referred to above for existing technology, proposed a kind of very high part of machining accuracy that do not need and also can realize the high-precision planet-gear speed reducer of speed reducer.

Purpose of the present invention can realize by following technical proposal: a kind of planet-gear speed reducer, comprise the output planetary frame, be set in the outer ring gear of output planetary frame, sun gear A and sun gear B and some groups of planetary gear constructions as input end, every group of planetary gear construction comprises as output terminal and is installed in planet pin on the planet carrier and fixed cover is located at planetary pinion A on the planet pin, planetary pinion B, described planetary pinion A and planetary pinion B respectively outer gearing are engaged in above-mentioned ring gear in above-mentioned sun gear A and sun gear B and all, it is characterized in that: have respectively spline A and spline B on described sun gear A and the sun gear B, all have on spline A and the spline B several adjacent between every gapped connecting end, has the helicoid that helix angle is a on the connecting end, connecting end on the described spline A, gap and helicoid are gone up corresponding gap with spline B respectively, connecting end and helicoid match, described sun gear A has the endoporus one that stage clip is installed, thereby thereby described stage clip can make helicoid on the spline B be slidingly connected along the upper corresponding helicoid of spline A to sun gear A and sun gear B effect makes sun gear B produce an angle of swing with respect to sun gear A.

In above-mentioned a kind of planet-gear speed reducer, described sun gear B has endoporus two, in the endoporus one cylindrical piece is installed, cylindrical piece one end stretches in the endoporus one, the other end extend in the endoporus two and is resisted against on the diapire of endoporus two, above-mentioned stage clip one end is resisted against on endoporus one diapire, and the other end is resisted against on the cylindrical piece.

For sun gear A and sun gear B easy to process, offer respectively endoporus one and endoporus two structures thereon, stage clip one end acts on endoporus one inwall and then to sun gear A effect, the other end by cylindrical piece to sun gear B effect, thereby sun gear A and sun gear B are left toward the opposite direction top (original state is that the connecting end on the spline A extend in the upper corresponding space of spline B fully, namely connecting end, space and the helicoid on the spline A respectively with upper corresponding space, connecting end and the helicoid of spline B fully in conjunction with the time state).The setting of cylinder block structured can be so that the length of stage clip can become shorter, and not so stage clip must run through whole endoporus one and endoporus two, thereby reduces cost.

In above-mentioned a kind of planet-gear speed reducer, described angle of swing is 0 °～a.

In above-mentioned a kind of planet-gear speed reducer, described helix angle a is 1.5 °～35 °.As preferably, helix angle a is 3 °.

In above-mentioned a kind of planet-gear speed reducer, described planetary gear construction is three groups or four groups or five groups.

Compared with prior art, all has the connecting end that structure is coincide mutually on this planet gear reduction unit spline A and the spline B, gap and helix angle are the structures such as helicoid of a, under the active force of stage clip, connecting end on its spline A, gap and helicoid are gone up corresponding gap with spline B respectively, connecting end and helicoid slowly break away from outward from fully mutually combining closely, thereby can be so that sun gear B produces any angle of swing in the 0 °～a scope with respect to sun gear A, thereby compensated the gap in various degree that gear produces because of service wear, improved transmission accuracy, do not assemble again thereby do not need to process high-precision component, can efficiently solve the precision that causes because of parts wear simultaneously yet and reduce problem.

Description of drawings

Fig. 1 is sectional view of the present invention.

Fig. 2 is structural representation of the present invention.

Fig. 3 is the stereogram of sun gear A.

Fig. 4 is the stereogram of sun gear B.

Among the figure, among the figure, 1, sun gear A; 1a, endoporus one; 2, spline A; 3, sun gear B; 3a, endoporus two; 4, spline B; 5, helicoid; 6, planetary pinion A; 7, planetary pinion B; 8, ring gear; 9, planet pin; 10, output planetary frame; 11, stage clip; 12, cylindrical piece.

Embodiment

Below be specific embodiments of the invention and by reference to the accompanying drawings, technological scheme of the present invention is further described, but the present invention be not limited to these embodiments.

Such as Fig. 1,2, shown in 3 and 4, this planet gear reduction unit, comprise output planetary frame 10, be set in the ring gear 8 outside the output planetary frame 10, sun gear A1 and sun gear B3 and three groups of planetary gear constructions as input end, every group of planetary gear construction comprises as output terminal and is installed in planet pin 9 on the planet carrier and fixed cover is located at planetary pinion A6 on the planet pin 9, planetary pinion B7, planetary pinion A6 and planetary pinion B7 respectively outer gearing are engaged in above-mentioned ring gear 8 in above-mentioned sun gear A1 and sun gear B3 and all, have respectively spline A2 and spline B4 on sun gear A1 and the sun gear B3, all have two on spline A2 and the spline B4 each other every gapped connecting end, the helicoid 5 that to have two helix angles on the connecting end be a, the helix angle a in the present embodiment is 3 °.Connecting end on the spline A2, gap and helicoid 5 match with spline B4 upper corresponding gap, connecting end and helicoid 5 respectively, sun gear A1 has endoporus one 1a that stage clip 11 is housed, thereby thereby stage clip 11 can make helicoid 5 on the spline B4 be slidingly connected along the upper corresponding helicoid 5 of spline A2 to sun gear A1 and sun gear B3 effect makes sun gear B3 produce an angle of swing with respect to sun gear A1.

Sun gear B3 has endoporus two 3a, among endoporus one 1a cylindrical piece 12 is installed, cylindrical piece 12 1 ends stretch among endoporus one 1a, and the other end extend among endoporus two 3a and is resisted against on the diapire of endoporus two 3a, stage clip 11 1 ends are resisted against on the endoporus one 1a diapire, and the other end is resisted against on the cylindrical piece 12.

Sun gear A1 is as input end, planet pin 9 is as output terminal, sun gear A1 rotates by spline A2, spline B4 and drives sun gear B3 rotation, sun gear A1 and sun gear B3 drive respectively planetary pinion A6 and planetary pinion B7 rotates and then drive planet pin 9 rotations, planetary pinion A6 is identical with the number of gears on the planetary pinion B7, sun gear A1 is identical with the number of gears of sun gear B3, the power transmission output that sun gear and the planetary gear ratio by correspondence reaches planet pin 9.Speed reducer is the constantly wearing and tearing of its gear in the process of working long hours, and can produce the space between its gear engagement, thereby reduce transmission accuracy each other.This speed reducer is by in two gap structures that have respectively on spline A2 and the spline B4 between two connecting ends and the connecting end, connecting end on the spline A2 can extend in the space of spline B4, connecting end on the spline B4 can extend in the space of spline A2, thereby realizes the power transmission between sun gear A1 and the sun gear B3.Simultaneously, being provided with helix angle a at connecting end is 3 ° helicoid 5, the original state of speed reducer is that the connecting end on the spline A2 extend in the upper corresponding space of spline B4 fully, it is the connecting end on the spline A2, space and helicoid 5 are gone up corresponding space with spline B4 respectively, connecting end and helicoid 5 complete combinations, when producing the space between the gear engagement, under the active force of 11 couples of sun gear A1 of stage clip and sun gear B3, sun gear A1 and sun gear B3 are pushed open each other outward, thereby make the helicoid 5 on the spline A2 mobile outward along the upper corresponding helicoid 5 of spline B4, when moving separately outward, spline A2 and spline B4 can produce circumferential displacement, sun gear B3 can produce angle of swing with respect to sun gear A1, when the helicoid 5 on the spline A2 just will be separated from helicoid 5 corresponding to spline B4, its angle of swing reached 3 ° of the angles of helix angle.Therefore its rotation angle range that can adjust to is 0 °～3 °, and this adjustment angle already fully can be to because the gap that produces between its gear that works long hours compensates, thereby improves its transmission accuracy.Simultaneously when producing, also no longer necessarily need the part of machining high-precision to be assembled into again the highi degree of accuracy transmission that speed reducer reaches speed reducer, the high-precision requirement when this kind compensation way can realize also that speed reducer production is dispatched from the factory.

Specific embodiment described herein only is to the explanation for example of the present invention's spirit.Those skilled in the art can make various modifications or replenish or adopt similar mode to substitute described specific embodiment, but can't depart from spirit of the present invention or surmount the defined scope of appended claims.

Claims

1. planet-gear speed reducer, comprise output planetary frame (10), be set in the outer ring gear (8) of output planetary frame (10), sun gear A (1) and sun gear B (3) and some groups of planetary gear constructions as input end, every group of planetary gear construction comprises as output terminal and is installed in planet pin (9) on the planet carrier and fixed cover is located at planetary pinion A (6) on the planet pin (9), planetary pinion B (7), described planetary pinion A (6) and planetary pinion B (7) respectively outer gearing in above-mentioned sun gear A (1) and sun gear B (3) and equal in be engaged in above-mentioned ring gear (8), it is characterized in that: have respectively spline A (2) and spline B (4) on described sun gear A (1) and the sun gear B (3), all have on spline A (2) and the spline B (4) several adjacent between every gapped connecting end, has the helicoid that helix angle is a (5) on the connecting end, connecting end on the described spline A (2), gap and helicoid (5) are gone up corresponding gap with spline B (4) respectively, connecting end and helicoid (5) match, described sun gear A (1) has the endoporus one (1a) that stage clip (11) is installed, described stage clip (11) can be to sun gear A (1) and sun gear B (3) thus effect makes helicoid (5) on the spline B (4) along the upper corresponding helicoid (5) of spline A (2) thereby is slidingly connected and makes sun gear B (3) produce an angle of swing with respect to sun gear A (1).

2. a kind of planet-gear speed reducer according to claim 1, it is characterized in that, described sun gear B (3) has endoporus two (3a), cylindrical piece (12) is installed in the endoporus one (1a), cylindrical piece (12) one ends stretch in the endoporus one (1a), the other end extend in the endoporus two (3a) and is resisted against on the diapire of endoporus two (3a), above-mentioned stage clip (11) one ends are resisted against on endoporus one (1a) diapire, and the other end is resisted against on the cylindrical piece (12).

3. a kind of planet-gear speed reducer according to claim 1 and 2 is characterized in that, described angle of swing is 0 °～a.

4. a kind of planet-gear speed reducer according to claim 3 is characterized in that, described helix angle a is 1.5 °～35 °.

5. a kind of planet-gear speed reducer according to claim 1 is characterized in that, described planetary gear construction is three groups or four groups or five groups.