WO2008138206A1

WO2008138206A1 - A driver for a back axle of a loader

Info

Publication number: WO2008138206A1
Application number: PCT/CN2008/000658
Authority: WO
Inventors: Henglin Xiao
Original assignee: Wuxi Kipor Power Co., Ltd.
Priority date: 2007-05-14
Filing date: 2008-04-01
Publication date: 2008-11-20
Also published as: CN101049800A; CN100484796C

Abstract

A driver for a back axle of a loader mainly includes a main reduction box case (10), a top case of a hydraulic motor reduction box (15), a base of the hydraulic motor reduction box (3), a cone driving gear axle of the back axle (7), a cone driving gear of the back axle (28), a differential gear case of the back axle (25), the differential gear cone gear pair of the back axle and a differential gear output axle(13) etc. A convex position ring (30) is arranged on the side of the base of the hydraulic motor reduction box (3). The side is opposite to that the top case of a hydraulic motor reduction box (2) arranged. A bearing seat concentric with the center of the locating ring (30) is arranged at the center of the locating ring (30). A seal groove (31) is arranged on said locating ring (30). Some bole holes (32) are arranged around said locating ring (30).

Description

Rear axle driving device of loader

Technical field

The present invention relates to a rear axle drive of a loader, and more particularly to a rear axle drive for a four-wheel drive loader, and belongs to the technical field of construction machinery.

Background technique

In the prior art, there are also many disclosed in the rear axle drive of a four-wheel drive loader, as disclosed in the application publication No. JP7081442: a planetary reduction mechanism is provided on the rear axle and a differential output shaft is provided on the rear axle Travel drive for hand brake wheel loaders. The hydraulic wet multi-plate brake is inserted at the outer end of the transverse box portion of the differential case, and the external gear is engaged on the gear portion of the output shaft end of the differential, and the planetary gear that is engaged with the ring gear is internally connected, and the support is freely rotatable. A planetary reduction mechanism is formed on the carrier on the rear axle, and the ring gear is sandwiched and integrated by the axle box and the horizontal box portion. The differential case is equipped with a brake and is connected to the axle box through a ring gear, so that the internal space can be effectively utilized and the degree of freedom and durability of the planetary reduction mechanism can be improved.

Then, in the above-disclosed patent, the brake is mounted on the axle and disposed in the differential case. Although part of the space inside the differential case is utilized, the complexity of manufacturing the component is improved, and the manufacturing cost is expensive. As the brake is set on the axle, if the damage is not good for repair, remove the hydraulic motor, remove the drive shaft, remove the hydraulic motor reducer, and finally remove the differential of the transmission bridge to perform maintenance. The general brake maintenance is also Inconvenient to carry out, maintenance costs are high, and professional maintenance personnel are required to carry out.

Summary of the invention

The object of the present invention is to overcome the above-mentioned deficiencies, and to provide a rear axle driving device for a loader, which can provide driving force or braking force to a driving device through a rear axle cone driving gear shaft when the wheel loader is driving or parking. Good sealing performance, compact structure, increased design freedom of the loader, high reliability, low manufacturing cost and convenient maintenance.

The main solution of the invention is achieved in this way:

The rear axle assembly of the invention adopts a wheel axle box body coupled to the left and right sides of the main reduction gear box, and the front end of the main reduction gear box body is coupled with a hydraulic motor reduction gear box assembly, and the hydraulic motor reduction gear box assembly is composed of a hydraulic motor reduction gear box upper cover and a hydraulic motor reduction gear box base. The housing, the variable hydraulic motor or the quantitative hydraulic motor is mounted on the end face of the hydraulic motor reducer base, and the hydraulic motor is driven by the front end of the motor output shaft. Gear, and transmission driven gear; passive gear transmission rear axle cone drive gear shaft; rear axle cone drive gear shaft installed in the center of hydraulic motor reducer assembly, one end of rear axle cone drive gear shaft connected to drive rear axle hydraulic motor reducer assembly The bridge cone drive gear, and meshes the rear axle cone driven gear, the rear axle cone driven gear is mounted on the rear axle differential case, and the rear axle differential case is equipped with a differential cone gear pair in the middle, and is provided with a difference a speed output shaft, an internal gear mounted on the output shaft end of the differential meshing planetary gear, the planetary gear being disposed on the planetary carrier, wherein the hydraulic motor reduction gear base is opposite to the side of the upper cover of the hydraulic motor reduction gearbox A protruding positioning ring is arranged on the top, and the center of the positioning ring is provided with at least one bearing seat concentric with the positioning ring.

The positioning ring is provided with a sealing groove.

A bolt hole is arranged on the circumference of the positioning ring protruding from the base of the hydraulic motor reduction box.

The present invention has the following advantages over the prior art:

The invention has the advantages of simple structure, compactness and reasonableness; the brake is arranged on the rear axle cone drive gear shaft, so that the front axle differential and the rear axle differential can rotate synchronously; can be passed on the wheel loader when driving or parking The rear axle cone drive gear shaft provides driving or braking force to the drive unit; the sealing performance is good, the structure is compact, the design freedom of the loader is increased, the reliability is high, the manufacturing cost is low, and the maintenance is convenient.

DRAWINGS

Figure 1 is a schematic view showing the structure of the present invention.

2 is a schematic structural view of a rear axle assembly of the present invention.

detailed description

The invention will be further described below in conjunction with the embodiments of the drawings:

The invention mainly consists of 1. variable hydraulic motor or quantitative hydraulic motor, 2. hydraulic motor reducer upper cover, 3. hydraulic motor reducer base, 4. brake base, 5. brake seat upper cover, 6. bolt, 7. after Bridge cone drive gear shaft, 8. bolt, 9. wheel axle, 10. wheel axle housing, 11. planetary carrier, 12. internal gear, 13. differential output shaft, 14. rear axle differential housing 15. Main reduction gearbox, 16. Planetary gear, 17. Bolt, 18. Bolt, 19. Brake inner disc, 20. Brake outer disc, 21. Upper piston, 22. Lower piston, 23. Hydraulic motor drive gear. Compression spring, 25. rear axle conical driven gear, 26. intermediate gear, 27. passive gear, 28. rear axle cone drive gear, 29. transmission shaft rear axle connector, 30. positioning ring, 31. sealing groove, 32. Bolt hole.

The rear axle assembly of the present invention employs a bolt 18 for fastening the wheel axle housing 10 to the left and right of the main reduction gear body 15. The front end of the main reduction gearbox 15 is coupled to the hydraulic motor reduction gearbox assembly and is bolted 8 fixed. The hydraulic motor reduction gearbox assembly is composed of a hydraulic motor reduction gear box upper cover 2 and a hydraulic motor reduction gear box base 3, and is fixed by a bolt 17 .

The hydraulic motor reduction gear box base 3 is provided with a convex positioning ring 30 on the side opposite to the upper cover 2 of the hydraulic motor reduction gear box; the positioning ring 30 is provided with at least one bearing concentric with the positioning ring 30. seat. The positioning ring 30 is provided with a sealing groove 31. The hydraulic motor reduction gear box base 3 is provided with at least two bolt holes 32 on the circumference of the protruding positioning ring 30.

The variable hydraulic motor or the quantitative hydraulic motor 1 is mounted on the end surface of the hydraulic motor reduction gear base 3, and the hydraulic motor drive gear 23 is mounted at the front end of the motor output shaft to drive the intermediate gear 26, and the driven gear 27 is driven; the driven gear 27 drives the rear axle cone drive gear shaft 7; the rear axle cone drive gear shaft 7 is installed in the center of the hydraulic motor reduction gear box assembly, and the rear axle cone drive gear shaft 7-end connection drives the rear axle cone drive gear 28 of the rear axle hydraulic motor reduction gearbox assembly, and meshes the rear axle cone passively The gear 25, the rear axle conical driven gear 25 is mounted on the rear axle differential case 14, and the rear axle differential case 14 rotates in synchronism with the rear axle conical driven gear 25. The rear axle differential case 14 is equipped with a differential bevel gear pair in the middle, and is provided with a differential output shaft 13, and the differential output shaft 13 follows the rear axle differential case 14 for rotation. The internal gear 12 mounted at the end of the differential output shaft 13 meshes with the planetary gear 16, which is disposed on the planetary carrier 11, and the planetary gear 16 drives the wheel axle 9 mounted in the wheel axle housing 10, the wheel along with the wheel axle The rotation of the rotation of 9 is performed by the power provided by the hydraulic motor to carry out the loading.

At the other end of the rear axle cone drive gear shaft 7, the drive shaft rear axle connector 29 is coupled. The rear axle cone drive gear shaft 7 is provided with a hydraulic brake.

The hydraulic brake is composed of a brake base 4, a brake seat upper cover 5, an upper piston 21, a brake inner disk 19, a brake outer disk 20, a lower piston 22 and the like. The brake base 4 is equipped with a brake base cover 5, which is fixed by bolts 6 and forms a brake housing. The piston 21, the plurality of brake inner discs 19, the brake outer disc 20, and the lower piston 22 are sequentially mounted in the housing. The brake inner disc 19 and the brake outer disc 20 are alternately arranged in the housing. The brake inner disc 19 and the brake outer disc 20 are used at least two or more sheets, respectively, and are driven or disengaged by hydraulic oil. The brake inner disc 19 is axially freely mounted on the rear axle cone drive gear shaft 7 and rotates synchronously with the rear axle cone drive gear shaft 7, and the hydraulic brake outer disc 20 is freely movable along the axial direction of the rear axle cone drive shaft 7 and passes through The pin is attached to the hydraulic brake case and does not rotate.

On the inner end surface of the brake motor base 4 of the hydraulic motor reduction gear box 2, a compression spring 24 is evenly arranged, and an oil inlet joint is arranged on the side of the upper cover 5 of the brake seat, and the inner cavity of the piston 22 is moved in parallel.

Claims

Rights request

1. A rear axle drive device for a loader, which is connected to a wheel axle housing (10) on the left and right sides of the main reduction gearbox (15), and a hydraulic motor reduction gearbox assembly, a hydraulic motor reduction gearbox at the front end of the main reduction gearbox (15) The assembly consists of a hydraulic motor gearbox top cover (2) and a hydraulic motor gearbox base (3). The variable hydraulic motor or the quantitative hydraulic motor (1) is mounted on the end face of the hydraulic motor reducer base (3) and is output through the motor. The front end of the shaft is equipped with a hydraulic motor drive gear (23) to drive the intermediate gear (26) and drive the driven gear (27); the driven gear (27) drives the rear axle cone drive gear shaft (7); the rear axle cone drive gear shaft (7) Installed in the center of the hydraulic motor gearbox assembly, the rear axle cone drive gear shaft (7) is connected at one end to the rear axle cone drive gear (28), and meshes the rear axle cone driven gear (25), and the rear axle cone driven gear (25) is mounted on On the rear axle differential case (14), the rear axle differential case (14) is equipped with a differential bevel gear pair in the middle, and a differential output shaft (13) is installed on the differential output. Axis (1 3) The internal gear (12) of the end meshes with the planetary gear (16), and the planetary gear (16) is disposed on the planetary carrier (11).

The utility model is characterized in that the hydraulic motor reduction gear box base (3) is provided with a convex positioning ring (30) on the side opposite to the upper cover (2) of the hydraulic motor reduction gear box, the center of the positioning ring (30) There is at least one bearing seat concentric with the positioning ring (30).

A rear axle driving device for a loader according to claim 1, wherein said positioning ring (30) is provided with a sealing groove (31).

A rear axle driving device for a loader according to claim 1 or 2, characterized in that the positioning ring (30) is provided with a bolt hole (32) on the circumference.