CN212099117U

CN212099117U - Crawler belt speed reducer

Info

Publication number: CN212099117U
Application number: CN202020744276.1U
Authority: CN
Inventors: 步永刚; 任志山; 王献卯
Original assignee: Shijiazhuang Zhuoju Machinery Manufacturing Co ltd
Current assignee: Shijiazhuang Zhuoju Machinery Manufacturing Co ltd
Priority date: 2020-05-08
Filing date: 2020-05-08
Publication date: 2020-12-08
Anticipated expiration: 2030-05-08

Abstract

The utility model relates to a crawler reduction gear, its structure is including motor wheel, first gear and the multistage planetary gear train that the transmission is connected in proper order, the axle center of first gear with the center pin coincidence of multistage planetary gear train, the motor wheel with first gear engagement, just the axle center of motor wheel is located the top in first gear axle center. The diameter of the first gear is larger than the diameter of the motor wheel. The utility model discloses driving motor's mounted position is higher from ground, improves the trafficability characteristic of track, and the protection motor is difficult impaired, and the train is arranged rationally, only uses tertiary planetary gear train to reach required reduction ratio, simple structure, reduces the processing cost.

Description

Crawler belt speed reducer

Technical Field

The utility model relates to a reduction gear, specifically speaking are track reduction gears.

Background

The crawler-type machinery is important mechanical equipment in engineering construction, including an excavator, a crane and the like, a motor reduces the speed and increases the torque through a speed reducer, and then the speed reducer outputs power to drive a crawler. Wherein the motor output shaft is coaxial with the pivot of track, and generally the motor is only about 200mm from ground, and the track is used for special environment subaerial specially, and the ground is often rugged and uneven in the work, often can take place colliding with on motor and the road surface, seriously influences the trafficability characteristic of equipment to device such as motor also can be damaged to the hard thing on the road surface.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a track reduction gear to the driving motor who solves current track is too near from ground, influences the trafficability characteristic and leads to the problem of motor damage easily.

The utility model discloses a realize like this: a crawler speed reducer comprises a motor wheel, a first gear and a multi-stage planetary gear train which are sequentially connected in a transmission manner, wherein the axis of the first gear is superposed with the central axis of the multi-stage planetary gear train, the motor wheel is engaged with the first gear, the axis of the motor wheel is positioned above the axis of the first gear, and the diameter of the first gear is larger than that of the motor wheel; multistage planetary gear train includes transmission connection's first planetary gear train, second planetary gear train and third planetary gear train in proper order, first planetary gear train includes first sun gear, first planet wheel, first ring gear and first planet carrier, the second planetary gear train includes second sun gear, second planet wheel, second ring gear and second planet carrier, the third planetary gear train includes third sun gear, third planet wheel, third ring gear and third planet carrier, first gear with first sun gear is an organic whole wheel.

The first planet carrier is a sun gear of a second planetary gear train, the second planet carrier is in key connection with a transmission shaft, the transmission shaft is a second sun gear, and the third gear ring is a power output end.

The transmission shaft is externally sleeved with a hollow shaft, and the degrees of freedom of the hollow shaft, the first gear ring, the second gear ring and the third planet carrier are all zero.

An end cover is arranged outside the motor wheel and the first gear, and a connecting disc for fixing a driving motor is arranged at the position where the motor wheel is installed on the end cover.

A front cover is arranged on the outer end face of the third gear ring, and a box body is arranged on the inner end face of the third gear ring.

The utility model discloses a motor wheel axle center is located the top in first gear axle center, carries power to multistage planetary gear train through one-level transmission, and driving motor's pivot and the axle center coincidence of motor wheel, the position of driving motor just are higher than the center pin of whole reduction gear like this, and driving motor highly improves greatly apart from ground to improved the use the utility model discloses a ground is kept away from to the trafficability characteristic of track, driving motor simultaneously, can not contact with ground easily, has reduced the impaired possibility of driving motor.

The motor wheel and the first gear are in one-stage transmission to achieve a speed reduction effect, meanwhile, the first gear and the first sun gear of the one-stage planetary gear train are integrated, power directly enters the multi-stage planetary gear train after the one-stage transmission, is subjected to multi-stage speed reduction by the multi-stage planetary gear train and is finally output by the third gear ring to drive the crawler belt to rotate.

The utility model discloses driving motor's mounted position is higher from ground, improves the trafficability characteristic of track, and the protection motor is difficult impaired, and the train is arranged rationally, only uses tertiary planetary gear train to reach required reduction ratio, simple structure, reduces the processing cost.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a perspective view of the present invention.

In the figure: 1. a motor wheel; 2. a first gear; 3. a first sun gear; 4. a first planet gear; 5. a first carrier; 6. a first ring gear; 7. a second sun gear; 8. a second planet carrier; 9. a second planet wheel; 10. a second ring gear; 11. a drive shaft; 12. a third sun gear; 13. a third planet gear; 14. a third carrier; 15. a third ring gear; 16. an end cap; 17. a connecting disc; 18. a hollow shaft; 19. a box body; 20. a front cover.

Detailed Description

As shown in fig. 1 and 2, the utility model discloses a motor wheel 1, first gear 2 and multistage planetary gear train that the transmission is connected in proper order, the axle center of first gear 2 and the center pin coincidence of multistage planetary gear train, motor wheel 1 and the meshing of first gear 2, and the axle center of motor wheel 1 is located the top in first gear 2 axle center.

The utility model discloses a 1 axle centers of motor wheel are located the top in 2 axle centers of first gear, carry power to multistage planetary gear train through one-level transmission, and driving motor's pivot and motor wheel 1's axle center coincide, and driving motor's position just is higher than the center pin of whole reduction gear like this, and driving motor highly improves greatly apart from ground to improved the use the utility model discloses a ground is kept away from to the trafficability characteristic of track, driving motor simultaneously, can not contact with ground easily, has reduced the impaired possibility of driving motor.

The diameter of the first gear 2 is larger than that of the motor wheel 1, the power transmitted from the motor wheel 1 to the first gear 2 is increased by a primary speed reduction primary torque and is equivalent to an original primary planetary gear train, the original primary planetary gear train is replaced by the transmission of the motor wheel 1 and the first gear 2, the installation position of the driving motor can be improved, and the speed reduction function of the original primary planetary gear train is realized.

The multistage planetary gear train comprises a first planetary gear train, a second planetary gear train and a third planetary gear train which are in transmission connection in sequence, the first planetary gear train comprises a first sun gear 3, a first planet gear 4, a first gear ring 6 and a first planet carrier 5, the second planetary gear train comprises a second sun gear 7, a second planet gear 9, a second gear ring 10 and a second planet carrier 8, the third planetary gear train comprises a third sun gear 12, a third planet gear 13, a third gear ring 15 and a third planet carrier 14, and the first gear 2 and the first sun gear 3 are integrated. The first planet carrier 5 is a sun gear of the second planet gear 9 system, the second planet carrier 8 is in key connection with a transmission shaft 11, the transmission shaft 11 is a second sun gear 7, and the third gear ring 15 is a power output end.

Because the first gear 2 and the first sun gear 3 of the first-stage planetary gear train are integrated, power directly enters the multi-stage planetary gear train after being subjected to first-stage transmission, is subjected to multi-stage speed reduction by the multi-stage planetary gear train and is finally output by the third gear ring 15 to drive the crawler to rotate.

A hollow shaft 18 is sleeved outside the transmission shaft 11, and the degrees of freedom of the hollow shaft 18, the first gear ring 6, the second gear ring 10 and the third planet carrier 14 are all zero. After power is transmitted to the first planetary gear train by the first gear 2, the power is transmitted to the second planetary gear train by the first planet carrier 5, transmitted to the transmission shaft 11 by the second planet carrier 8, transmitted to the third planetary gear train by the transmission shaft 11, and finally output by the third gear ring 15.

An end cover 16 is arranged outside the motor wheel 1 and the first gear 2 and used for mounting the motor wheel 1 and the first gear 2, and a connecting disc 17 used for fixing a driving motor is arranged at the position where the end cover 16 is mounted with the motor wheel 1. A front cover 20 is provided on the outer end surface of the third ring gear 15, the front cover 20 seals the end of the speed reducer to prevent contamination of the inside, and a case 19 is provided on the inner end surface of the third ring gear 15, the case 19 rotating together with the third ring gear 15 for driving the crawler.

The utility model discloses driving motor's mounted position is higher from ground, and driving motor is apart from about 400mm on ground, improves the trafficability characteristic of track, and the protection motor is difficult impaired, and the train is arranged rationally, only uses tertiary planetary gear train to reach required reduction ratio, and simple structure reduces the processing cost.

Claims

1. A track speed reducer is characterized by comprising a motor wheel, a first gear and a multi-stage planetary gear train which are sequentially connected in a transmission manner, wherein the axis of the first gear is superposed with the central axis of the multi-stage planetary gear train, the motor wheel is meshed with the first gear, the axis of the motor wheel is positioned above the axis of the first gear, and the diameter of the first gear is larger than that of the motor wheel; multistage planetary gear train includes transmission connection's first planetary gear train, second planetary gear train and third planetary gear train in proper order, first planetary gear train includes first sun gear, first planet wheel, first ring gear and first planet carrier, the second planetary gear train includes second sun gear, second planet wheel, second ring gear and second planet carrier, the third planetary gear train includes third sun gear, third planet wheel, third ring gear and third planet carrier, first gear with first sun gear is an organic whole wheel.

2. The track reducer of claim 1, wherein the first carrier is a sun of a second planetary gear set, the second carrier is keyed to a drive shaft, the drive shaft is a second sun, and the third ring gear is a power take-off.

3. The track reducer of claim 2, wherein a hollow shaft is coupled outside the drive shaft, and the degrees of freedom of the hollow shaft, the first ring gear, the second ring gear, and the third carrier are all zero.

4. The track reducer of claim 1, wherein an end cap is provided outside the motor wheel and the first gear, and a connection pad for fixing a driving motor is provided at a position where the end cap mounts the motor wheel.

5. The track reducer according to claim 1, wherein a front cover is provided on an outer end surface of the third ring gear, and a case is provided on an inner end surface of the third ring gear.