CN210739302U

CN210739302U - Rear axle assembly of agricultural tractor

Info

Publication number: CN210739302U
Application number: CN202020741181.4U
Authority: CN
Inventors: 王兴洪
Original assignee: Ningbo Benye Heavy Industry Co ltd
Current assignee: Ningbo Benye Heavy Industry Co ltd
Priority date: 2020-05-08
Filing date: 2020-05-08
Publication date: 2020-06-12
Anticipated expiration: 2030-05-08

Abstract

The utility model provides an agricultural tractor rear axle assembly, including transmission case and differential assembly, the tip of differential mechanism casing is equipped with the installation component, and the installation component is equipped with elastomeric element including fixing solid fixed ring, the go-between of installing outside solid fixed ring, installing at the axle sleeve of solid fixed ring tip with rotating and installing the support ring between axle sleeve and go-between at the solid fixed ring of differential mechanism casing tip, between the sun gear in axle sleeve and the differential mechanism casing, elastomeric element makes the axle sleeve has outside trend of motion, the inner wall of axle sleeve is equipped with the spline groove, and the tip of go-between is equipped with flange, the axle sleeve with be equipped with slide bearing between the support ring. The utility model discloses agricultural tractor rear axle assembly increases the installation component, and the equipment is convenient, and positioning accuracy is high, and has the compensation function, improves the engagement degree between the gear, avoids the too big and tooth of beating of backlash that causes because the error during production or assembly, has improved the job stabilization nature of differential subassembly, has prolonged its life.

Description

Rear axle assembly of agricultural tractor

Technical Field

The utility model relates to an agricultural tractor, in particular to an agricultural tractor rear axle assembly.

Background

With the development of industry, the progress of agriculture is also obviously improved, various devices appear, the traditional cattle cultivation and manual initialization production are replaced, the production efficiency is also greatly improved, a walking tractor is taken as an example, the walking tractor is a transportation tool and agricultural machinery popular in villages and towns in China, and a diesel engine is taken as power, so that the walking tractor is popular with farmers due to the characteristics of small size, flexibility and strong power. The drive type, the traction type, and the combined drive and traction type are classified according to the working performance. The driving type is mainly matched with the rotary cultivator for operation, so the machine is also called a power cultivator; the traction type is mainly matched with traction type farm tools for operation; the dual-purpose type can be matched with a rotary cultivator for operation, and can be matched with a traction farm tool for operation or matched with a trailer for transportation operation.

At present, on tractors produced in China, a simple closed bevel gear differential is widely adopted in a rear axle assembly, the differential is generally provided with two planetary gears or four planetary gears, wherein the differential provided with the two planetary gears is generally applied to medium and small power tractors, the differential provided with the four planetary bevel gears is generally applied to high power tractors, and the connection of the four planetary gears is generally in a shaft-through structure.

Because certain assembly error and machining error inevitably exist, errors are accumulated during assembly, a gap is formed between the planetary gear and the sun gear, and rigid impact is generated during stopping or starting, so that gear beating is caused, and the gear is easy to damage.

SUMMERY OF THE UTILITY MODEL

【1】 Technical problem to be solved

The to-be-solved technical problem of the utility model is to provide an agricultural tractor rear axle assembly who assembles conveniently, has error compensation function.

【2】 Technical scheme for solving problems

The utility model provides a rear axle assembly of an agricultural tractor, which comprises a transmission box body and a differential component arranged in the transmission box body, the differential assembly includes a differential case 21, planetary gears 222 and a sun gear 24, the end of the differential case 21 is provided with a mounting assembly including a fixed ring 25 fixed to the end of the differential case 21, a connection ring 26 rotatably mounted outside the fixed ring 25, a sleeve 27 mounted to the end of the fixed ring 25, and a support ring 28 mounted between the sleeve 27 and the connection ring 26, an elastic member is provided between the sleeve 27 and the sun gear 24 in the differential case 21, the elastic component makes the shaft sleeve 27 have an outward movement tendency, the inner wall of the shaft sleeve 27 is provided with a spline groove, the end of the connecting ring 26 is provided with a connecting flange 261, and a sliding bearing 29 is arranged between the sleeve 27 and the supporting ring 28.

Further, a sealing ring is arranged between the outer wall of the support ring 28 and the inner wall of the connection ring 26.

Furthermore, the tip circumference equipartition of solid fixed ring 25 has positioning groove, the tip of axle sleeve 27 be equipped with positioning groove corresponds and can block in positioning groove's location is protruding.

Further, an annular groove 260 is formed in the inner wall of the connection ring 26, a snap spring is installed in the annular groove 260, and the end of the support ring is in contact with the snap spring.

Further, the shaft sleeve 27 includes a first annular body 271 and a second annular body 272 that are connected to each other and coaxially disposed, a diameter of the second annular body 272 is smaller than a diameter of the first annular body 271, a first step surface and a second step surface are formed between the first annular body 271 and the second annular body 272, the elastic member is mounted on the first step surface, and the spline groove is opened on an inner wall of the second annular body 272.

Further, the support ring 28 includes a third annular body 281 and a fourth annular body 282 which are connected with each other and coaxially arranged, a diameter of the fourth annular body 282 is smaller than that of the third annular body 281, a third step surface is formed between the third annular body 281 and the fourth annular body 282, and the sliding bearing 29 is installed between the second step surface and the third step surface.

Further, the end of the connecting ring 26 extends radially inward to form a mounting portion 262, and a sealing ring is disposed between the inner wall of the mounting portion 262 and the outer wall of the fourth ring-shaped body 282.

【3】 Advantageous effects

The utility model discloses agricultural tractor rear axle assembly increases the installation component, and the equipment is convenient, and positioning accuracy is high, and has the compensation function, improves the engagement degree between the gear, avoids the too big and tooth of beating of backlash that causes because the error during production or assembly, has improved the job stabilization nature of differential subassembly, has prolonged its life.

Drawings

Fig. 1 is a schematic structural view of a mounting assembly of the rear axle assembly of the agricultural tractor of the present invention;

FIG. 2 is a cross-sectional view of the mounting assembly of the agricultural tractor rear axle assembly of the present invention;

FIG. 3 is a schematic view of the mounting assembly of the rear axle assembly of the agricultural tractor according to the present invention;

in the figure: 21-differential housing, 22-planetary gear carrier, 222-planetary gear, 24-sun gear, 25-fixed ring, 26-connecting ring, 260-annular recess, 261-connecting flange, 262-mounting part, 27-shaft sleeve, 271-first annular body, 272-second annular body, 28-supporting ring, 281-third annular body, 282-fourth annular body.

Detailed Description

The embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

Referring to fig. 1 to 3, the present invention provides a rear axle assembly of an agricultural tractor, including a transmission case (not shown in the figure) and a differential assembly installed in the transmission case, the differential assembly includes a differential housing 21, the differential housing 21 is cylindrical, a main gear is fixed on an outer wall of the differential housing 21, a planet gear carrier 22 is disposed in the differential housing 21, at least two planet gears 222 are uniformly distributed on a side wall of the planet gear carrier 22 in a circumferential direction, two sun gears 24 meshed with the planet gears are disposed in the differential housing 21, 2 sun gears are disposed on two sides of the planet gear carrier, a mounting assembly is disposed at an end of one end of the differential housing 21, the mounting assembly is coaxial with the differential housing 21, and specifically, the mounting assembly includes a fixing ring 25, a connecting ring 26, a shaft sleeve 27, a supporting ring 28 and a sliding bearing 29, the fixed ring 25 is fixed at the end of the differential case 21 through screws, the connecting ring 26 is rotatably mounted outside the fixed ring 25 through a bearing, the shaft sleeve 27 is mounted at the end of the fixed ring 25, and the supporting ring 28 is mounted between the shaft sleeve 27 and the connecting ring 26; positioning grooves are uniformly distributed in the circumferential direction of the end part of the fixing ring 25, positioning bulges which correspond to the positioning grooves and can be clamped into the positioning grooves are arranged at the end part of the shaft sleeve 27, and during assembly, the shaft sleeve is axially inserted, so that the positioning bulges are inserted into the positioning grooves, and radial limiting is realized; the shaft sleeve 27 comprises a first annular body 271 and a second annular body 272 which are connected with each other and coaxially arranged, the diameter of the second annular body 272 is smaller than that of the first annular body 271, so that a first step surface and a second step surface are formed between the first annular body 271 and the second annular body 272, wherein the first step surface is positioned between the inner walls of the first annular body and the second annular body, the second step surface is positioned between the outer walls of the first annular body and the second annular body, an elastic component is arranged between the first step surface and the sun gear 24, the elastic component enables the shaft sleeve 27 to have an axially outward movement trend, the elastic component in the embodiment is a spring, a spline groove is formed on the inner wall of the second annular body 272, a spline groove is also formed on the sun gear, the first annular body and the second annular body are coaxially arranged; the support ring 28 includes a third annular body 281 and a fourth annular body 282 which are connected with each other and coaxially arranged, the diameter of the fourth annular body 282 is smaller than that of the third annular body 281, a third step surface is formed between the third annular body 281 and the fourth annular body 282, the third step surface is positioned between the inner walls of the third annular body 281, and a sliding bearing 29 is arranged between the shaft sleeve 27 and the support ring 28, in the embodiment, the sliding bearing is L-shaped, the radial part of the sliding bearing is positioned between the second step surface and the third step surface, and the axial part of the sliding bearing is positioned between the second annular body 272 and the fourth annular body 282, so that radial and axial limit is realized; an annular groove 260 is formed in the inner wall of the connecting ring 26, a snap spring is mounted in the annular groove 260, the end of the third annular body 281 of the support ring 28 is in contact with the snap spring to realize axial limiting, the end of the connecting ring 26 extends outwards in the radial direction to form a connecting flange 261, a mounting hole is formed in the connecting flange 261, and a sealing ring is arranged between the inner wall of the connecting ring 26 and the outer wall of the third annular body 281; the end of the connecting ring 26 extends radially inward to form a mounting portion 262, and a sealing ring is also arranged between the inner wall of the mounting portion 262 and the outer wall of the fourth ring-shaped body 282 to improve the sealing effect; in this embodiment, the axial length of second annular body 272 is less than the axial length of fourth annular body 282.

During installation, flange 261 passes through bolt fixed connection with the transmission box, and differential subassembly can drive solid fixed ring 25 and axle sleeve 27 and rotate, and elastomeric element makes and forms axial pressure between axle sleeve 27 and the sun gear, makes both have the trend of motion dorsad, guarantees the degree of engagement, and operating stability is good.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the technical principle of the present invention, and these improvements and decorations should also be regarded as the protection scope of the present invention.

Claims

1. The utility model provides an agricultural tractor rear axle assembly, includes the transmission case and installs differential subassembly in the transmission case, differential subassembly includes differential mechanism casing, planetary gear and sun gear, its characterized in that: the tip of differential mechanism casing is equipped with the installation subassembly, the installation subassembly is including fixing solid fixed ring, the ground of differential mechanism casing tip are installed with rotating gu fixed ring outer go-between, install gu the axle sleeve of fixed ring tip and install the axle sleeve with support ring between the go-between, the axle sleeve with be equipped with elastomeric element between the sun gear in the differential mechanism casing, elastomeric element makes the axle sleeve has outside trend of motion, the inner wall of axle sleeve is equipped with the spline groove, the tip of go-between is equipped with flange, the axle sleeve with be equipped with slide bearing between the support ring.

2. An agricultural tractor rear axle assembly as defined in claim 1, wherein: and a sealing ring is arranged between the outer wall of the support ring and the inner wall of the connecting ring.

3. An agricultural tractor rear axle assembly as defined in claim 1, wherein: the end part of the fixing ring is circumferentially and uniformly provided with positioning grooves, and the end part of the shaft sleeve is provided with positioning bulges which correspond to the positioning grooves and can be clamped into the positioning grooves.

4. An agricultural tractor rear axle assembly as defined in claim 1, wherein: an annular groove is formed in the inner wall of the connecting ring, a clamp spring is installed in the annular groove, and the end portion of the supporting ring is in contact with the clamp spring.

5. An agricultural tractor rear axle assembly as defined in claim 1, wherein: the shaft sleeve comprises a first annular body and a second annular body which are connected with each other and coaxially arranged, the diameter of the second annular body is smaller than that of the first annular body, a first step surface and a second step surface are formed between the first annular body and the second annular body, the elastic part is installed on the first step surface, and the spline groove is formed in the inner wall of the second annular body.

6. An agricultural tractor rear axle assembly as defined in claim 5, wherein: the support ring includes interconnect and the third annular body and the fourth annular body of coaxial setting, the diameter of fourth annular body is less than the diameter of third annular body, the third annular body with form the third step face between the fourth annular body, slide bearing installs the second step face with between the third step face.

7. An agricultural tractor rear axle assembly as defined in claim 6, wherein: the end part of the connecting ring extends inwards in the radial direction to form an installation part, and a sealing ring is arranged between the inner wall of the installation part and the outer wall of the fourth annular body.