CN201326727Y

CN201326727Y - Planetary-gear reduction gearbox with low noise

Info

Publication number: CN201326727Y
Application number: CNU2008201676863U
Authority: CN
Inventors: 苏由唱; 叶辉
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-11-20
Filing date: 2008-11-20
Publication date: 2009-10-14
Anticipated expiration: 2018-11-20

Abstract

The utility model relates to a planetary-gear reduction gearbox with low noise, which belongs to the technical field of speed reducing devices. The planetary-gear reduction gearbox comprises an internal gear ring, a front end cover and a rear end cover, wherein the internal gear ring can be used as a case body, and the front end cover and the rear end cover are respectively engaged with the front end and the back end of the internal gear ring. Besides, an output shaft and the front end cover rotationally support each other, one end of the output shaft is positioned inside the internal gear ring and forms a planet carrier, the other end of the output shaft extends out of the front end cover, one end of a plurality of planetary-gear shafts is fixed to the planet carrier, a rolling bearing is arranged between each planetary-gear shaft and a planetary gear, the outer ring of the rolling bearing is fixed to the planetary gear, the inner ring of the rolling bearing is fixed to each planetary-gear shaft, two ends of the inner ring are higher than two end faces of the planetary gear, the other end of each planetary-gear shaft is fixed to a fixing plate, the diameter of the fixing plate is smaller than the smallest inner diameter of the internal gear ring, a distance is arranged between the fixing plate and the inner end face of the rear end cover, and one end face of the inner ring of the rolling bearing contacts with the fixing plate. The utility model has the advantages of comparatively low running noise and less wear.

Description

The planetary gear reduction box of low noise

Technical field

The utility model relates to a kind of planetary gear reduction box of low noise, belongs to the technical field of speed reducer.

Technical background

In the prior art, between the internal surface of planetary gear reduction box rear end cover and the planetary end face friction plate is set usually, in the process of planetary gear reduction box running, the rotation that planetary end face will not stop in Friction Disk Surface, rub between the two, the noise of generation is bigger, after using certain hour, will cause the damage of speed reducer after friction disc wear is comparatively serious even scrap, thereby cause short problem of planetary gear reduction box life-span.

Summary of the invention

The utility model purpose is to provide a kind of running noise less, it is less to wear and tear, working life is the planetary gear reduction box of long low noise, the noise that has solved the generation that prior art exists is bigger, after using certain hour, will cause the damage of speed reducer after friction disc wear is comparatively serious even scrap, thereby cause problems such as the planetary gear reduction box life-span is short.

Above-mentioned technical purpose of the present utility model mainly solves by the following technical programs: it comprises the ring gear that uses as casing and is engaged in the front cover and the rear end cover of ring gear front end and rear end respectively, swivel bearing between output shaft and the front cover, output shaft one end is positioned at ring gear and forms planet carrier, the output shaft the other end extends to outside the front cover, several planet pin one ends and planet carrier are fixed, be provided with rolling bearing between described planet pin and the planetary pinion, the outer ring and the planetary pinion of rolling bearing are fixed, the inner ring of described rolling bearing and planet pin are fixed and the two ends of inner ring are higher than planetary two end faces, the other end and the fixed plate of described planet pin are fixed, the diameter of fixed plate is less than the minimum diameter of ring gear, separately, an end face of rolling bearing inner ring contacts with fixed plate between the interior edge face of fixed plate and rear end cover.Wherein, in the speed reducer operation process, relative friction can not take place between planetary pinion end face and the fixed plate, relative friction can not take place between fixed plate and the ring gear, thereby the noise in the speed reducer operation process is less, has also prolonged the working life of speed reducer yet.

As preferably, be provided with pad between described planet carrier end face and the rolling bearing inner ring end face, the external diameter of described pad is less than the external diameter of rolling bearing inner ring.

As preferably, described fixed plate is provided with several and the through hole that the planet pin external diameter cooperates, and this fixing end of described planet pin and fixed plate passes the through hole of fixed plate and is provided with the axle snap ring in this end of planet pin.Wherein, by being set, the through hole that matches with planet pin can prevent that the downslide of rolling bearing from can detect three planet pins again and whether meeting installation requirement on fixed plate.

As preferably, the axial height of described front cover be the ring gear axial height 1/2-1 doubly, be provided with two ball bearings between output shaft and the front cover.Wherein since output shaft to be subjected to coming from planetary radially torsion bigger, therefore, the front cover axial height is strengthened and is provided with the stability that two ball bearings can improve output shaft, reduce circular runout.

As preferably, be connected by axial screw between described front cover and the ring gear, the screw by radially between described rear end cover and the ring gear is connected.Wherein, since limited as the ring gear wall thickness that casing uses, therefore, will adopt axial bolt and radial screw to fix respectively between front cover and rear end cover and the ring gear, the axial height of effective minimizing ring gear, thus make structure of the present utility model more compact.

Characteristics such as therefore, it is less to the utlity model has running noise, and it is less to wear and tear, and working life is long.

Description of drawings

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

Embodiment

Below by embodiment, and in conjunction with the accompanying drawings, the technical solution of the utility model is described in further detail.

Embodiment 1: as shown in Figure 1, comprise the ring gear 1 that uses as casing and be engaged in the front cover 2 and the rear end cover 3 of ring gear 1 front end and rear end respectively, the axial height of front cover 2 is 1/2 times of ring gear 1 axial height, fixedly connected by axial screw 4 between front cover 2 and the ring gear 1, fixedly connected by screw 5 radially between rear end cover 3 and the ring gear 1, pass through two ball bearing 7 swivel bearings between output shaft 6 and the front cover 2, one end of output shaft 6 is positioned at ring gear 1 and forms planet carrier 8, the other end of output shaft 6 extends to outside the front cover 2, one end of three planet pins 9 and planet carrier 8 are fixing, be provided with rolling bearing 11 between planet pin 9 and the planetary pinion 10, the outer ring of rolling bearing 11 and planetary pinion 10 are fixing, the inner ring of rolling bearing 11 and planet pin 9 two ends fixing and inner ring are higher than two end faces of planetary pinion 10, be provided with pad 13 between planet carrier 8 end faces and the rolling bearing 11 inner ring end faces, the external diameter of pad 13 is less than the external diameter of rolling bearing 11 inner rings.The other end of planet pin 9 and fixed plate 12 are fixing, fixed plate 12 is provided with three through holes 14 that cooperate with planet pin 9 external diameters, planet pin 9 and fixed plate 12 these fixing ends pass the through hole of fixed plate 12 and are provided with axle in this end of planet pin 9 with a snap ring 15, the diameter of fixed plate 12 is less than the minimum diameter of ring gear 1, separately, an end face of the inner ring of rolling bearing 11 contacts with fixed plate 12 between the interior edge face of fixed plate 12 and rear end cover 3.

Wherein, in the speed reducer operation process, relative friction can not take place between planetary pinion end face and the fixed plate, relative friction can not take place between fixed plate and the ring gear, thereby the noise in the speed reducer operation process is less, has also prolonged the working life of speed reducer yet.

Claims

1, a kind of planetary gear reduction box of low noise, comprise the ring gear that uses as casing and be engaged in the front cover and the rear end cover of ring gear front end and rear end respectively, swivel bearing between output shaft and the front cover, output shaft one end is positioned at ring gear and forms planet carrier, the output shaft the other end extends to outside the front cover, several planet pin one ends and planet carrier are fixed, it is characterized in that being provided with rolling bearing between described planet pin and the planetary pinion, the outer ring and the planetary pinion of rolling bearing are fixed, the inner ring of described rolling bearing and planet pin are fixed and the two ends of inner ring are higher than planetary two end faces, the other end and the fixed plate of described planet pin are fixed, the diameter of fixed plate is less than the minimum diameter of ring gear, separately, an end face of rolling bearing inner ring contacts with fixed plate between the interior edge face of fixed plate and rear end cover.

2, the planetary gear reduction box of low noise according to claim 1 is characterized in that being provided with pad between described planet carrier end face and the rolling bearing inner ring end face, and the external diameter of described pad is less than the external diameter of rolling bearing inner ring.

3, the planetary gear reduction box of low noise according to claim 1 and 2, it is characterized in that described fixed plate is provided with several and the through hole that the planet pin external diameter cooperates, this fixing end of described planet pin and fixed plate passes the through hole of fixed plate and is provided with the axle snap ring in this end of planet pin.

4, the planetary gear reduction box of low noise according to claim 1 and 2, the axial height that it is characterized in that described front cover are 1/2-1 times of ring gear axial height, are provided with two ball bearings between output shaft and the front cover.

5, the planetary gear reduction box of low noise according to claim 1 and 2 is characterized in that being connected by axial screw between described front cover and the ring gear, and the screw by radially between described rear end cover and the ring gear is connected.