A tractor axle with planetary reduction mechanism

Abstract

The present invention discloses a tractor axle with a planetary reduction mechanism, which is composed of an axle main reduction mechanism assembly, a planetary gear reduction mechanism assembly and a wheel hub mechanism assembly. The main reduction mechanism assembly is equipped with a main reduction assembly and a main reduction differential lock operating mechanism. The planetary gear reduction mechanism assembly is respectively designed at both ends of the axle main reduction mechanism assembly, and a planetary gear reduction assembly is installed therein. The wheel hub mechanism assembly is equipped with a brake system mechanism and a wheel hub seat. The planetary reduction mechanism assembly of the present invention is designed on both sides of the axle main reduction mechanism assembly, which can realize the axle to reduce speed again after the main reduction. The planetary gear reduction transmission is adopted, with coaxial output, compact structure, high strength and large transmission torque. Under the same wheel side output torque, the design strength of the transmission system and the main reduction gear can be reduced, so that the transmission system and the main reduction assembly can be designed to be more compact and compact, so as to achieve the purpose of reliable use and lightweight manufacturing.

Description

Technical Field

[0001] The invention relates to a tractor axle with a planetary reduction mechanism, and belongs to the technical field of tractor transmission system manufacturing. Background Art

[0002] The structure of the tractor transmission system is relatively complex. The transmission and the axle are usually made into one piece. The transmission route is usually engine-clutch-transmission-auxiliary transmission-axle main reduction-axle-wheel, and it has gone through the reduction transmission of three reduction mechanisms: transmission, auxiliary transmission, and axle main reduction. Since the last stage is the axle main reduction, the axle main reduction also bears the greatest force. In order to improve the reliability of the transmission system, the spiral bevel gear modulus of the axle main reduction is usually designed to be relatively large, so it is difficult to reduce the structural size, which adds great difficulty to the lightweight manufacturing of the tractor and the arrangement of surrounding accessories. Summary of the invention

[0003] The present invention provides a tractor axle with a planetary reduction mechanism, specifically, a set of planetary reduction mechanisms are respectively added at both ends of the output of the main reduction half shaft of the axle as terminal reducers, and power is output from the planetary carrier, which fully utilizes the advantages of the planetary gear mechanism with strong load-bearing capacity and compact structure, thereby achieving the purpose of optimizing the structure of the entire transmission system.

[0004] The object of the present invention is achieved by the following manner: a tractor axle with a planetary reduction mechanism, which is composed of an axle main reduction mechanism assembly, a planetary gear reduction mechanism assembly and a wheel hub mechanism assembly, wherein the main reduction mechanism assembly is equipped with a main reduction assembly and a main reduction differential lock operating mechanism, the planetary gear reduction mechanism assembly is respectively designed at both ends of the axle main reduction mechanism assembly, and is equipped with a planetary gear reduction assembly, and the wheel hub mechanism assembly is equipped with a brake system mechanism and a wheel hub seat;

[0005] The planetary gearbox housing in the planetary gear reduction mechanism assembly is designed with bolt holes and inner holes. The right inner hole is matched with the outer circle of the main reduction assembly bearing seat, and the left inner hole is matched with the right step outer circle of the half-axle housing, and then connected by the planetary gearbox housing fastening bolt assembly. The left inner hole of the half-axle housing is matched with the step outer circle of the wheel hub bearing seat sleeve, and is also fastened and connected into a whole by bolts.

[0006] The planetary gear reduction mechanism assembly is internally designed with a planetary carrier bearing locking nut assembly, a planetary carrier bearing thrust washer, a tapered bearing, a planetary carrier fastening bolt assembly, a planetary carrier assembly one, a planetary gear shaft retaining ring, a planetary gear thrust washer, a planetary gear needle roller bearing, a planetary gear shaft, a planetary carrier assembly two, a fixed gear fixing bolt assembly, a fixed gear, a planetary gear case, a left front half shaft, a left front half shaft bearing, a bearing retaining ring, a bearing spacer, a sun gear, a planetary gear, an inner gear ring, a sun gear retaining ring, and a rear half shaft.

[0007] As a preferred embodiment of the present invention, the sun gear is assembled on the left front half shaft through a spline connection, and the planetary gear, planetary gear shaft retaining ring, planetary gear thrust washer, planetary gear needle bearing, and planetary gear shaft are installed on the planetary carrier assembly to form a planetary carrier assembly mechanism, and the planetary carrier assembly mechanism is fixed to the half shaft housing through the planetary carrier bearing locking nut assembly, planetary carrier bearing thrust washer, and tapered bearing, and the fixed gear is fixed to the planetary gear box housing through bolts; the inner ring gear cooperates with the fixed gear and the planetary gear.

[0008] Power transmission path: After the power is transmitted to the axle main reduction mechanism assembly, the left and right half-shaft gears of the main reduction assembly are respectively output to the left and right front half-shafts (the left drive is taken as an example below, and the right drive is the same). The left front half-shaft is transmitted to the sun gear in the planetary gear reduction mechanism assembly, the sun gear is transmitted to the planetary gear, and the planetary gear is transmitted to the inner ring gear. Since the inner ring gear is locked and cannot rotate by the fixed gear fixed to the planetary gear box housing, the planetary gear carrier is forced to rotate to achieve deceleration. In this way, the planetary gear carrier transmits power to the left half-shaft through its internal spline, and the left half-shaft transmits power to the wheel hub mechanism assembly to drive the tractor.

[0009] Beneficial effects of the present invention: the planetary reduction mechanism assembly of the tractor axle with planetary reduction mechanism of the present invention is designed on both sides of the axle main reduction mechanism assembly, which can realize the axle to reduce speed again after the main reduction, adopts planetary gear reduction transmission, coaxial output, compact structure, high strength, large transmission torque, and can reduce the design strength of the transmission system and the main reduction gear under the same wheel side output torque, so that the transmission system and the main reduction assembly can be designed to be more compact and compact, so as to achieve reliable use and realize the purpose of lightweight manufacturing. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a structural schematic diagram of the present invention;

[0011] Figure 2 It is a schematic diagram of the wheel hub mechanism assembly structure of the present invention;

[0012] Figure 3 It is a schematic diagram of the structure of the planetary gear reduction mechanism assembly of the present invention;

[0013] Figure 4 It is a schematic diagram of the structure of the main reduction mechanism assembly of the vehicle axle of the present invention;

[0014] In the figure: 1 wheel hub mechanism assembly, 2 planetary gear reduction mechanism assembly, 3 axle main reduction mechanism assembly, 4 wheel hub bearing seat sleeve, 5 wheel hub seat, 6 half shaft housing, 7 planet carrier bearing locking nut assembly, 8 planet carrier bearing thrust washer, 9 cone bearing, 10 planetary gear case housing fastening bolt assembly, 11 planet carrier fastening bolt assembly, 12 planet carrier assembly one, 13 planetary gear shaft retaining ring, 14 planetary gear thrust washer, 15 planetary gear needle roller bearing, 16 planetary gear shaft, 17 planetary carrier assembly two, 18 fixed gear fixing bolt assembly, 19 fixed gear, 20 planetary gear case housing, 21 main reduction assembly bearing seat, 22 main reduction differential lock operating mechanism, 23 main reduction case housing, 24 main reduction assembly, 25 left front half shaft, 26 left front half shaft bearing, 27 bearing retaining ring, 28 bearing spacer, 29 sun gear, 30 planetary gear, 31 inner ring gear, 32 sun gear retaining ring, 33 rear half shaft. DETAILED DESCRIPTION

[0015] The present invention is further described in detail below in conjunction with the accompanying drawings and specific implementations.

[0016] like Figure 1-4 As shown, a tractor axle with a planetary reduction mechanism is composed of three major components: the axle main reduction mechanism assembly 3, the planetary gear reduction mechanism assembly 2, and the wheel hub mechanism assembly 1. The main reduction mechanism assembly 3 is equipped with a main reduction assembly 24 and a main reduction differential lock operating mechanism 22. The main reduction assembly 3 can achieve a deceleration effect, and the main reduction differential lock operating mechanism 22 can achieve synchronous driving of the left and right wheels to enhance off-road passing performance; the planetary gear reduction mechanism assembly 2 is equipped with a planetary gear reduction assembly, and the power is output from the planetary carrier to achieve deceleration; the wheel hub mechanism assembly 1 is equipped with a brake system mechanism and a wheel hub seat 5 to achieve vehicle driving and control. Planetary gear reduction mechanisms 1 are designed at both ends of the half-axle output of the axle, and the transmission is decelerated by the main reduction assembly and then subjected to terminal deceleration.

[0017] The planetary gear box housing 20 in the planetary gear reduction mechanism assembly 2 is designed with bolt holes and inner holes. The right inner hole is matched with the outer circle of the main reduction assembly bearing seat 21, and the left inner hole is matched with the right step outer circle of the half-axle housing 6, and then connected by the planetary gear box housing fastening bolt assembly 10. The left inner hole of the half-axle housing 6 is matched with the step outer circle of the wheel hub bearing seat sleeve 4, and is also fastened and connected into a whole by bolts.

[0018] The planetary gear reduction mechanism assembly 2 is internally designed with a planetary carrier bearing locking nut assembly 7, a planetary carrier bearing thrust washer 8, a tapered bearing 9, a planetary carrier fastening bolt assembly 11, a planetary carrier assembly 1 12, a planetary gear shaft retaining ring 13, a planetary gear thrust washer 14, a planetary gear needle roller bearing 15, a planetary gear shaft 16, a planetary carrier assembly 2 17, a fixed gear fixing bolt assembly 18, a fixed gear 19, a planetary gear case 20, a left front half shaft 25, a left front half shaft bearing 26, a bearing retaining ring 27, a bearing spacer 28, a sun gear 29, a planetary gear 30, an inner ring gear 31, a sun gear retaining ring 32, and a rear half shaft 33.

[0019] The sun gear 29 is assembled on the left front half shaft 25 through a spline connection; the planetary gear 30, the planetary gear shaft retaining ring 13, the planetary gear thrust pad 14, the planetary gear needle bearing 15, and the planetary gear shaft 16 are installed on the planetary carrier assembly to form a planetary carrier assembly mechanism, and the planetary carrier assembly mechanism is fixed to the half shaft housing 6 through the planetary carrier bearing locking nut assembly 7, the planetary carrier bearing thrust pad 8, and the cone bearing 9, and the whole mechanism can be transported around the shaft; the fixed gear 19 is fixed to the planetary gear box housing 20 through bolts 18; the inner gear ring 31 cooperates with the fixed gear 19 and the planetary gear 30. The power output of the planetary gear reduction mechanism assembly 2 is output through the planetary carrier, which can achieve a larger reduction ratio.

[0020] Its working process is: the power is transmitted to the main reduction assembly 24 of the axle main reduction mechanism assembly for deceleration, and then output to the left front half shaft 25 by the left half shaft gear of the main reduction assembly 24, and the left front half shaft 25 is transmitted to the sun gear 29 in the terminal planetary gear reduction mechanism assembly 2, and the sun gear 29 is transmitted to the planetary gear 30, and the planetary gear 30 is transmitted to the inner ring gear 31. Since the inner ring gear is locked and cannot rotate by the fixed gear 19 fixed to the planetary gear box housing 20, the planetary gear frame 12 is forced to rotate to achieve deceleration, so that the planetary gear frame 12 transmits power to the rear half shaft 33 through its internal spline, and the rear half shaft 33 transmits power to the wheel hub mechanism assembly 1 to realize the driving of the tractor.

Claims

1. A tractor axle with a planetary reduction mechanism, comprising an axle main reduction mechanism assembly (3), a planetary gear reduction mechanism assembly (2) and a wheel hub mechanism assembly (1), characterized in that: The main reduction mechanism assembly (3) is equipped with a main reduction mechanism (24) and a main reduction differential lock operating mechanism (22); the planetary gear reduction mechanism assembly (2) is respectively designed at both ends of the axle main reduction mechanism assembly (3), and is equipped with a planetary gear reduction assembly; the wheel hub mechanism assembly (1) is equipped with a brake system mechanism and a wheel hub seat (5); the planetary gear box housing (20) in the planetary gear reduction mechanism assembly (2) is designed with bolt holes and inner holes, the right inner hole is matched with the outer circle of the main reduction assembly bearing seat (21) for positioning, and the left inner hole is matched with the outer circle of the main reduction assembly bearing seat (21) for positioning. The right step outer circle of the half-shaft housing (6) is matched and positioned, and then connected by a planetary gear box housing fastening bolt assembly (10); the left inner hole of the half-shaft housing (6) is matched and positioned with the step outer circle of the wheel hub bearing seat sleeve (4), and is also fastened and connected into a whole by bolts; the planetary gear reduction mechanism assembly (2) is internally designed with a planetary carrier bearing locking nut assembly (7), a planetary carrier bearing thrust washer (8), a tapered bearing (9), a planetary carrier fastening bolt assembly (11), a planetary carrier assembly (12), a planetary gear shaft retaining ring (13), and a planetary gear thrust washer (14). , planetary gear needle bearing (15), planetary gear shaft (16), planetary carrier assembly (17), fixed gear fixing bolt assembly (18), fixed gear (19), planetary gear box housing (20), left front half shaft (25), left front half shaft bearing (26), bearing retaining ring (27), bearing spacer (28), sun gear (29), planetary gear (30), inner gear ring (31), sun gear retaining ring (32), rear half shaft (33); the sun gear (29) is assembled on the left front half shaft (25) through a spline connection, and the planetary gear (30) is assembled on the left front half shaft (25) through a spline connection. ), a planetary gear shaft retaining ring (13), a planetary gear thrust washer (14), a planetary gear needle bearing (15), and a planetary gear shaft (16) are mounted on a planetary carrier assembly to form a planetary carrier assembly mechanism. The planetary carrier assembly mechanism is fixed to a half-shaft housing (6) through a planetary carrier bearing locking nut assembly (7), a planetary carrier bearing thrust washer (8), and a tapered bearing (9). A fixed gear (19) is fixed to a planetary gear box housing (20) through a fixed gear fixing bolt assembly (18). An inner gear ring (31) cooperates with the fixed gear (19) and the planetary gear (30).

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