CN210949709U

CN210949709U - Tractor end transmission planet carrier structure

Info

Publication number: CN210949709U
Application number: CN201921574127.9U
Authority: CN
Inventors: 柴景阳; 康健; 魏志宏; 张想; 鞠超; 闻浩楠
Original assignee: First Tractor Co Ltd
Current assignee: First Tractor Co Ltd
Priority date: 2019-09-21
Filing date: 2019-09-21
Publication date: 2020-07-07
Anticipated expiration: 2029-09-21

Abstract

A tractor end drive planet carrier structure comprising: the sun wheel shaft, the half shaft shell, the inner bearing, the output shaft, the outer bearing and the planet carrier assembly; the output shaft is supported in the semi-axis shell through inner bearing and outer bearing, and the planet carrier closes the piece and passes through the spline suit on the output shaft, and sun gear axle and four planet gears pass through the gear teeth meshing and clamp on the planet carrier closes the piece, and sun gear axle and output shaft are the coaxial line installation. The planet carrier assembly member is fixed on the output shaft through the output shaft clamp spring; the four planet wheel inner retainer rings are respectively sleeved on the four planet shafts; the four planet wheels are sleeved on the four planet shafts through the needle rollers and the needle roller spacer sleeves; the four planet wheels are respectively meshed with the gear ring through gear teeth. The utility model discloses compact structure, reasonable in design, four planet axle pressure equipments form board-like planet carrier in four holes of planet carrier backup pad, and simple structure is reliable, has solved the problem that the planet carrier structure is complicated, the processing degree of difficulty is big effectively.

Description

Tractor end transmission planet carrier structure

Technical Field

The utility model belongs to the tractor field relates to a tractor end drive planet carrier structure.

Background

At present, the tail end transmission planet carrier of a tractor produced in China is mostly formed by casting, and has the disadvantages of complex structure, multiple processing procedures and high processing difficulty. And when the number of the planet gears is more than 3, the clearance between the planet gears is too small, and the casting ribs connecting the two ends cannot be cast.

The invention patent application published by the national intellectual property office 2014.06.25 for 'improvement of tractor planet end transmission', application date: 2014.03.22, application No.: 2014101101226, publication number: CN 103883681A. Discloses a planetary tail end transmission structure of a tractor, which has similar points with the content of the application. The invention application comprises the following steps: the coaxial output shaft and the driving shaft that set up, the cover is equipped with the axle sleeve on the output shaft, and the one end of driving shaft is provided with the sun gear, install on the output shaft the planet wheel axle of installation with sun gear meshing transmission's planet wheel, the ring gear that has the internal tooth that sets up on the axle sleeve with planet wheel meshing transmission, planet wheel axle and planet wheel between overlap in proper order from inside to outside and be equipped with bearing and intermediate ring, be provided with radial clearance of floating between planet wheel and the intermediate ring, the advantage is: the invention is provided with the intermediate ring and the radial floating gap between the planet wheel and the intermediate ring to form a buffer oil film, so that the planet wheel is in suspension connection, and the uniform load of the planet wheel in the tooth length direction during working is ensured. However, when the number of the planet gears is more than 3, the gap between the planet gears is too small, and the casting ribs connecting the two ends cannot be cast.

Therefore, there is a need to develop a tractor end transmission planet carrier structure, which is a planet shaft press-fit on a planet carrier support plate, so as to solve the existing problems.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a tractor end transmission planet carrier structure has solved the problem that the planet carrier structure is complicated among the prior art, and the processing degree of difficulty is big.

The technical scheme of the utility model is that a tractor end transmission planet carrier structure includes: the sun wheel shaft, the half shaft shell, the inner bearing, the output shaft, the outer bearing and the planet carrier assembly; the output shaft is supported in the semi-axis shell through inner bearing and outer bearing, and the planet carrier closes the piece and passes through the spline suit on the output shaft, and sun gear axle and four planet gears pass through the gear teeth meshing and clamp on the planet carrier closes the piece, and sun gear axle and output shaft are the coaxial line installation.

And a gear ring is pressed in the hole of the half-shaft shell and is fixed on the half-shaft shell through three positioning pins.

The output shaft is provided with an inner ring of an oil seal, and an outer ring of the oil seal is arranged in a hole on the semi-shaft shell.

A bearing retainer ring is arranged at the right end of the inner bearing; a nut locking plate is arranged at the right end of the bearing retainer ring, a locking nut is arranged at the right end of the nut locking plate, and the locking nut is rotated to pre-tighten the inner bearing and the outer bearing through the nut locking plate and the bearing retainer ring; and after pre-tightening is completed, the locking nut is fixed by the nut locking plate.

The planet carrier assembly member is fixed on the output shaft through the output shaft clamp spring; the four planet wheel inner retainer rings are respectively sleeved on the four planet shafts; the four planet wheels are sleeved on the four planet shafts through the needle rollers and the needle roller spacer sleeves; the four planet wheels are respectively meshed with the gear ring through gear teeth.

The planet carrier assembly member includes: the planet carrier supporting plate, the planet shaft pin shaft and the planet shaft are arranged on the planet carrier supporting plate; the four planet shafts 22 are press-fitted into four holes of the planet carrier support plate and fixed to the planet carrier support plate by four planet shaft pin shafts.

The utility model adopts the above technical scheme can reach following positive effect after: the utility model discloses compact structure, reasonable in design, four planet axle pressure equipments form board-like planet carrier in four holes of planet carrier backup pad, and simple structure is reliable, has solved the problem that the planet carrier structure is complicated, the processing degree of difficulty is big effectively.

Drawings

Fig. 1 is a schematic structural view of a transmission planet carrier structure at the tail end of a tractor according to the present invention;

fig. 2 is a schematic structural view of a planet carrier of a tractor end transmission planet carrier structure of the present invention;

fig. 3 is a schematic sectional view taken along line a-a of fig. 2.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and examples. A kind of tractor end transmits the planet carrier structure, mainly include: the planet carrier assembly device comprises an output shaft clamp spring 1, a sun wheel shaft 2, a planet shaft clamp spring 3, a planet shaft supporting plate 4, a planet wheel outer retainer ring 5, a needle roller 6, a needle roller spacer 7, a positioning pin 8, a gear ring 9, a planet wheel 10, a planet wheel inner retainer ring 11, a half shaft shell 12, a lock nut 13, a nut lock plate 14, a bearing retainer ring 15, an inner bearing 16, an output shaft 17, an outer bearing 18, an oil seal 19 and a planet carrier assembly part B; the planet carrier assembly member B comprises a planet carrier support plate 20, a planet shaft pin shaft 21 and a planet shaft 22; the four planet shafts 22 are pressed in four holes of the planet carrier support plate 20, and the four planet shafts 22 are fixed on the planet carrier support plate 20 through four planet shaft pin shafts 21; the gear ring 9 is pressed in a hole of the semi-axis shell 12, and the gear ring 9 is fixed on the semi-axis shell 12 through three positioning pins 8; an output shaft 17 is supported in the half-shaft shell 12 through an inner bearing 16 and an outer bearing 18, an inner ring of an oil seal 19 is arranged on the output shaft 17, and an outer ring of the oil seal 19 is arranged in a hole on the half-shaft shell 12; a bearing retainer ring 15 is arranged at the right end of the inner bearing 16; a nut locking plate 14 is arranged at the right end of the bearing retainer ring 15; a locking nut 13 is arranged at the right end of the nut locking plate 14; the locking nut 13 is rotated to pre-tighten the inner bearing 16 and the outer bearing 18 through the nut locking plate 14 and the bearing retainer 15; after pre-tightening is completed, the locking nut 13 is fixed by a nut locking plate 14; the planet carrier assembly member B is sleeved on the output shaft 17 through a spline, and the planet carrier assembly member B is fixed on the output shaft 17 through the output shaft clamp spring 1; the four planet wheel inner retainer rings 11 are respectively sleeved on the four planet shafts 22; the four planet wheels 10 are sleeved on four planet shafts 22 through the needle rollers 6 and the needle roller spacer bushes 7; a planet shaft supporting plate 4 is arranged at the right sides of the four planet wheels 10, and four holes in the planet shaft supporting plate 4 are respectively sleeved on the four planet shafts 22; four planet wheel outer retainer rings 5 are arranged on the right side of the planet shaft supporting plate 4, and the planet wheel outer retainer rings 5 are respectively sleeved on four planet shafts 22; four planet shaft snap springs 3 are arranged on the right sides of the four planet wheel outer check rings 5, and the planet shaft snap springs 3 are respectively arranged in snap spring grooves of four planet shafts 22; the four planet wheels 10 are respectively meshed with the gear ring 9 through gear teeth; the sun wheel shaft 2 is meshed with four planet wheels 10 through gear teeth.

When the sun wheel shaft 2 rotates, the four planet wheels 10 are driven to rotate, the planet carrier assembly member B is driven to rotate and output, the output shaft 17 is driven to rotate selectively, and the effects of reducing speed and increasing torque are achieved.

The invention is not described in detail in the prior art, but only in the preferred embodiments, but those skilled in the art will understand that the various changes made in the form and details without departing from the scope of the invention as defined in the claims are all within the scope of the invention.

Claims

1. A tractor end drive planet carrier structure comprising: the planetary gear mechanism comprises a sun gear shaft (2), a planet gear (10), a half shaft shell (12), an inner bearing (16), an output shaft (17), an outer bearing (18) and a planet carrier assembly member (B); the method is characterized in that: an output shaft (17) is supported in a semi-shaft shell (12) through an inner bearing (16) and an outer bearing (18), a planet carrier assembly member (B) is sleeved on the output shaft (17) through a spline, a sun wheel shaft (2) and four planet wheels (10) are clamped on the planet carrier assembly member (B) through gear teeth meshing, and the sun wheel shaft (2) and the output shaft (17) are coaxially installed.

2. The tractor end drive planet carrier structure of claim 1, wherein: the gear ring (9) is pressed in the hole of the half-shaft shell (12), and the gear ring (9) is fixed on the half-shaft shell (12) through three positioning pins (8).

3. The tractor end drive planet carrier structure of claim 1, wherein: the output shaft (17) is provided with an inner ring of an oil seal (19), and an outer ring of the oil seal (19) is arranged in a hole on the half-shaft shell (12).

4. The tractor end drive planet carrier structure of claim 1, wherein: a bearing retainer ring (15) is arranged at the right end of the inner bearing (16); a nut locking plate (14) is arranged at the right end of the bearing retainer ring (15), a locking nut (13) is arranged at the right end of the nut locking plate (14), and the inner bearing (16) and the outer bearing (18) are pre-tightened by rotating the locking nut (13) through the nut locking plate (14) and the bearing retainer ring (15); and after the pre-tightening is finished, the locking nut (13) is fixed by a nut locking plate (14).

5. The tractor end drive planet carrier structure of claim 1, wherein: the planet carrier assembly member (B) is fixed on the output shaft (17) through the output shaft clamp spring (1); four planet wheel inner retainer rings (11) are respectively sleeved on four planet shafts (22); the four planet wheels (10) are sleeved on the four planet shafts (22) through the needle rollers (6) and the needle roller spacer bushes (7); the four planet wheels (10) are respectively meshed with the gear ring (9) through gear teeth.

6. The tractor end drive planet carrier structure of claim 1, wherein: the planet carrier assembly member (B) includes: a planet carrier support plate (20), a planet shaft pin shaft (21) and a planet shaft (22); the four planet shafts (22) are pressed in four holes of the planet carrier support plate (20), and the four planet shafts (22) are fixed on the planet carrier support plate (20) through four planet shaft pin shafts (21).