CN111022606A

CN111022606A - Planetary differential steering drive axle of tracked vehicle

Info

Publication number: CN111022606A
Application number: CN201911229936.0A
Authority: CN
Inventors: 贺胜浩; 朱贤勇
Original assignee: Hunan Baotian Heavy Industry Co Ltd
Current assignee: Hunan Baotian Heavy Industry Co Ltd
Priority date: 2019-12-04
Filing date: 2019-12-04
Publication date: 2020-04-17

Abstract

The invention belongs to the field of drive axles of track-mounted tractors, in particular to a planetary differential steering drive axle of a tracked vehicle, which comprises a shell, a steering input shaft, a driving input shaft, a gearwheel, duplex teeth, a steering shaft, a driving rear shaft, a bevel gear, a driving wheel and planetary wheel mechanisms, wherein the steering input shaft, the steering shaft and the driving input shaft are all arranged on the shell, the duplex teeth are in key joint with the steering shaft, and the planetary wheel mechanisms are symmetrically arranged at two sides of the driving input shaft, and the planetary differential steering drive axle has the beneficial effects that: firstly, a multi-drive steering technology is adopted, so that the smaller steering radius is easier to realize, the in-situ steering can be performed at 360 degrees, the disc type stepless steering is realized, the vehicle works stably, and the working condition of operators is improved; secondly, the planet wheel edge is adopted for speed reduction, the reduction ratio is larger, and the structure is more compact. The multi-gear hybrid vehicle can be configured with various driving modes, such as front driving and rear driving, has rich matched power, and can be used for vehicles with mechanical multi-gear and hydraulic speed change and the like.

Description

Planetary differential steering drive axle of tracked vehicle

Technical Field

The invention belongs to the field of crawler tractor drive axles, and particularly relates to a planetary differential steering drive axle of a crawler vehicle.

Disclosure of Invention

The Hunan land belongs to a hilly area, the field has a plurality of small fields, the field soil is wet and muddy, and the serious problem that the field cannot be ploughed for four years in three years, namely shallow in one year, deep in two years and too deep in three years is easily caused by using a wheel type tractor. Therefore, the research and popularization of the crawler tractor suitable for paddy field operation in southern hilly areas have great social significance for solving the problems of high efficiency, high quality and protective farming of agricultural equipment in southern hilly areas.

The traditional crawler tractor mostly adopts unilateral brake type steering, the steering radius is large, and driving is inconvenient compared with small fields and villages.

Disclosure of Invention

In order to realize the mutual reverse driving and zero-turning-radius steering of the left and right crawler belts, the invention provides a planetary differential steering drive axle of a crawler vehicle, which can realize the mutual reverse driving and zero-turning-radius steering of the left and right crawler belts.

The planetary differential steering drive axle of the tracked vehicle comprises a shell, a steering input shaft, a driving input shaft, a gearwheel, duplex teeth, a steering shaft, a driving rear shaft, a bevel gear, a driving wheel and a planetary gear mechanism, wherein the steering input shaft, the steering shaft and the driving input shaft are all arranged on the shell, and the duplex teeth are in key joint with the steering shaft.

Preferably, the planetary reduction mechanism comprises a gear ring fixing frame, a gear ring fixing frame connecting shaft, a sun wheel, a planet wheel, a gear ring, a planet shaft, a planet carrier and a planet carrier half shaft, the sun wheel is in key connection with the driving rear shaft as a power input end, the planet wheel is meshed between the sun wheel and the gear ring, the sun wheel and the planet wheel are limited through the planet shaft, the planet carrier and the planet carrier half shaft, the planet carrier half shaft is in spline connection with the driving wheel as a power output end, the gear ring is limited through the gear ring fixing frame and the gear ring fixing frame connecting shaft, and the gear ring fixing frame connecting shaft is in key.

Preferably, there are three sets of planet wheels, and the centers of the planet wheels are uniformly arranged at a central angle of 120 degrees.

The invention has the beneficial effects that: firstly, a multi-drive steering technology is adopted, so that the smaller steering radius is easier to realize, the in-situ steering can be performed at 360 degrees, the disc type stepless steering is realized, the vehicle works stably, and the working condition of operators is improved; secondly, the planet wheel edge is adopted for speed reduction, the reduction ratio is larger, and the structure is more compact. The multi-gear hybrid vehicle can be configured with various driving modes, such as front driving and rear driving, has rich matched power, and can be used for vehicles with mechanical multi-gear and hydraulic speed change and the like.

Drawings

FIG. 1 is a schematic view of the structure of the present invention

FIG. 2 is a schematic view of the planetary gear mechanism

In fig. 1 to 2, 1, a drive input shaft, 2, a bevel gear, 3, a drive rear shaft, 4, a sun gear, 5, a planet gear, 6, a ring gear, 7, a planet shaft, 8, a planet carrier, 9, a planet carrier half shaft, 10, a drive wheel, 11, a ring gear fixing frame, 12, a ring gear fixing frame connecting shaft, 13, a gearwheel, 14, a double gear, 15, a steering shaft, 16, a steering input shaft, 17 and a housing.

Detailed Description

The invention is further described in the following with specific embodiments in conjunction with the accompanying drawings.

In fig. 1 to 2, a steering input shaft 16 is vertically installed on the upper portion of a housing 17, a driving input shaft 1 is installed on the lower portion of the housing 17, a steering shaft 15 is horizontally installed on the housing 17 below the steering input shaft 16, double coupling teeth 14, a large gear 13, a driving wheel 10 and a planetary gear mechanism are symmetrically arranged on two sides of a central axis of the steering input shaft 16, the double coupling teeth 14 are connected to the steering shaft 15 in a keyed mode, the large gear 13 is connected with the steering input shaft 16 through the double coupling teeth 14, the planetary gear reduction mechanism comprises a gear ring fixing frame 11, a gear ring fixing frame connecting shaft 12, a sun gear 4, a planetary gear 5, a gear ring 6, a planetary shaft 7, a planetary carrier 8 and a planetary carrier half shaft 9, the driving rear shaft 3 is horizontally arranged between the steering shaft 15 and the driving input shaft 1, a bevel gear 2 is connected to the driving rear shaft 3 in a keyed mode between the two large gears 13, the bevel gear 2 is engaged with the driving input shaft 1, planet carrier 8 and sun gear 4, planet carrier 8 passes through the bearing with drive rear shaft 3 and is connected, sun gear 4 is connected with 3 keys-type connections of drive rear shaft as a power input end, the meshing has planet wheel 5 between sun gear 4 and the ring gear 6, sun gear 4 and planet wheel 5 are through planet axle 7, it is spacing to be close to planet carrier 8 of gear wheel 13 side and the planet carrier semi-axis 9 of keeping away from gear wheel 13 side, planet carrier semi-axis 9 is connected with drive wheel 10 spline as a power output end, ring gear 6 is spacing through ring gear 6 mount 11 of keeping away from gear wheel 13 side and ring gear 6 mount connecting axle 12 of being close to gear wheel 13 side, ring gear 6 mount connecting axle 12 is connected with gear wheel 13 key joint as another power input end, ring gear 6 mount 11 passes through the bearing.

The planet wheels 5 are provided with three groups and are uniformly arranged in the center of the sun wheel 4 in a central angle of 120 degrees.

The working principle of the invention is that when the steering input shaft 16 is in unpowered input, the gear ring 6 can be regarded as fixed according to the structure, and then the power for driving the input shaft 11 can be output through the planet carrier half shaft 9 after two-stage speed reduction through the bevel gear 2 and the planetary speed reducing mechanism, and the vehicle can be directly driven to run linearly; when the rotating speed of the steering input shaft 16 is input, power can be converted into two power flows with opposite rotating directions through the left and right double-linkage teeth 14 and respectively transmitted to the gear ring 6 of the planetary gear mechanism, and when the rotating speed of the gear ring 6 is higher than the zero rotating speed of the sun gear 4, the half shaft 9 of the planet carrier can start to rotate reversely, so that the steering purpose of the whole mechanism is realized.

The above embodiments are only preferred embodiments of the present invention, and the protection scope of the present invention is not limited thereby, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.

Claims

1. A planetary differential steering drive axle of a tracked vehicle comprises a shell, a steering input shaft, a driving input shaft, a gearwheel, duplex teeth, a steering shaft, a driving rear shaft, a bevel gear, a driving wheel and a planetary gear mechanism, wherein the steering input shaft, the steering shaft and the driving input shaft are all arranged on the shell, and the duplex teeth are in key joint with the steering shaft.

2. A tracked vehicle planetary differential steering transaxle according to claim 1 wherein the planetary reduction mechanism comprises a ring gear mount, a ring gear mount connecting shaft, a sun gear, planet gears, a ring gear, a planet shaft, a planet carrier and a planet carrier half shaft, the sun gear being keyed to the drive rear shaft as one power input, the sun gear and the ring gear having planet gears engaged therewith, the sun gear and the planet gears being constrained by the planet shaft, the planet carrier and the planet carrier half shaft, the planet carrier half shaft being keyed to the drive wheel as one power output, the ring gear being constrained by the ring gear mount and the ring gear mount connecting shaft, the ring gear mount connecting shaft being keyed to the bull gear as the other power input.

3. A tracked vehicle planetary differential steering axle as claimed in claim 2, wherein there are three sets of planet wheels, arranged uniformly at a central angle of 120 ° about the sun wheel centre.