CN201328045Y

CN201328045Y - Motor with planetary-gear reduction gearbox

Info

Publication number: CN201328045Y
Application number: CNU2008201676859U
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 motor with a planetary-gear reduction gearbox, which belongs to the technical field of motor production and manufacturing. 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.

Description

The motor of band planetary gear reduction box

Technical field

The utility model relates to a kind of motor with planetary gear reduction box, belongs to the technical field that motor is manufactured.

Technical background

In the prior art, between the inner surface of its planetary gear reduction box rear end cap of motor of band planetary gear reduction box 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 that produces is bigger, after using certain hour, will cause the damage of reduction box 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, useful life is the motor of the band planetary gear reduction box of long low noise, the planetary gear reduction box running noise that has solved the generation that prior art exists is bigger, after using certain hour, will cause the damage of reduction box 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 motor body and planetary gear reduction box, planetary gear reduction box comprises the ring gear that uses as casing and is engaged in the front end housing and the rear end cap of ring gear front end and rear end respectively, swivel bearing between output shaft and the front end housing, output shaft one end is positioned at ring gear and forms planet carrier, the output shaft other end extends to outside the front end housing, several planet pin one ends and planet carrier are fixed, be provided with rolling bearing between described planet pin and the planetary gear, the outer ring and the planetary gear 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 head of described planet pin are fixed, the diameter of fixed head is less than the minimum diameter of ring gear, separately, an end face of rolling bearing inner ring contacts with fixed head between the inner face of fixed head and rear end cap.Wherein, in the reduction box operation process, relative friction can not take place between planetary gear end face and the fixed head, relative friction can not take place between fixed head and the ring gear, thereby the noise in the reduction box operation process is less, has also prolonged the useful life of reduction box 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 head 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 head passes the through hole of fixed head 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 head.

As preferably, the axial height of described front end housing be the ring gear axial height 1/2-1 doubly, be provided with two ball bearings between output shaft and the front end housing.Wherein since output shaft to be subjected to coming from planetary radially torsion bigger, therefore, the front end housing 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 end housing and the ring gear, the screw by radially between described rear end cap 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 end housing and rear end cap 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 useful 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 motor body 16 and planetary gear reduction box, wherein planetary gear reduction box comprises the ring gear 1 that uses as casing and is engaged in the front end housing 2 and the rear end cap 3 of ring gear 1 front end and rear end respectively, the axial height of front end housing 2 is 1/2 times of ring gear 1 axial height, fixedly connected by axial screw 4 between front end housing 2 and the ring gear 1, fixedly connected by screw 5 radially between rear end cap 3 and the ring gear 1, pass through two ball bearing 7 swivel bearings between output shaft 6 and the front end housing 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 end housing 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 gear 10, the outer ring of rolling bearing 11 and planetary gear 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 gear 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 head 12 are fixing, fixed head 12 is provided with three through holes 14 that cooperate with planet pin 9 external diameters, planet pin 9 and fixed head 12 these fixing ends pass the through hole of fixed head 12 and are provided with axle in this end of planet pin 9 with a snap ring 15, the diameter of fixed head 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 head 12 between the inner face of fixed head 12 and rear end cap 3.

Wherein, in the reduction box operation process, relative friction can not take place between planetary gear end face and the fixed head, relative friction can not take place between fixed head and the ring gear, thereby the noise in the reduction box operation process is less, has also prolonged the useful life of reduction box yet.

Claims

1, a kind of motor with planetary gear reduction box, comprise motor body and planetary gear reduction box, planetary gear reduction box comprises the ring gear that uses as casing and is engaged in the front end housing and the rear end cap of ring gear front end and rear end respectively, swivel bearing between output shaft and the front end housing, output shaft one end is positioned at ring gear and forms planet carrier, the output shaft other end extends to outside the front end housing, 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 gear, the outer ring and the planetary gear 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 head of described planet pin are fixed, the diameter of fixed head is less than the minimum diameter of ring gear, separately, an end face of rolling bearing inner ring contacts with fixed head between the inner face of fixed head and rear end cap.

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

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

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