CN212921019U

CN212921019U - 18 ton fork installation transaxle

Info

Publication number: CN212921019U
Application number: CN202022169274.7U
Authority: CN
Inventors: 蔡军; 任高奇; 卜习燕
Original assignee: Lonking Fujian Bridge Box Co Ltd
Current assignee: Lonking Fujian Bridge Box Co Ltd
Priority date: 2020-09-28
Filing date: 2020-09-28
Publication date: 2021-04-09
Anticipated expiration: 2030-09-28

Abstract

The utility model discloses a drive axle of 18-ton fork loader, which takes an axle housing and a support shaft as bearing parts after welding, wheel edge assemblies are supported at two sides, a main reducer assembly is arranged in the middle of the axle housing, and the wheel edge assemblies and the main reducer assembly are connected at two sides of a half shaft; the inner hole of the wheel shell is respectively provided with a tapered roller bearing 32028 and 32224 as an inner bearing and an outer bearing so as to enhance the bearing capacity, and the two bearings are supported on a support shaft; the axle housing is provided with an axle housing lug seat with axle housing lug seat reinforcing ribs, the wall thickness of the axle housing lug seat reinforcing ribs is 20mm, and the axle housing lug seat reinforcing ribs extend to the edges of the matching surfaces of the frame and the lug seats so as to meet the heavy-load working condition requirement; the inner gear ring is reversely trimmed during machining according to collected heat treatment deformation trend data during gear shaping, the fact that a tooth part is corrected after heat treatment is guaranteed to improve precision, and the problems that an existing wheel edge supporting bearing is insufficient in bearing capacity, and axle housing lug seat breakage and inner gear ring cracking failure rate are high easily caused under heavy-load working conditions are solved.

Description

18 ton fork installation transaxle

Technical Field

The utility model relates to a fork installation transaxle, concretely relates to 18 tons of fork installation transaxles.

Background

At present, the trend of development of the forklift loader industry to large tonnage is more and more obvious, wherein the diameters of an inner bearing position and an outer bearing position of a wheel-side support shaft of a drive axle of the forklift loader with 18 tons are respectively

And

GB/T297 tapered roller bearings 32024 and 32221 are selected for corresponding inner and outer bearings, the thickness of an axle housing lug reinforcing rib is 16mm, the reinforcing rib is not supported to the edge of the matching surface of a frame lug, and the machining of inner gear ring gear shaping is not reversely modified. The drive axle of the 18-ton fork loader with the structure has the following defects: the diameters of two bearing positions of the wheel-side support shaft are smaller, the bearing capacity is insufficient, the requirement of heavy-load working conditions cannot be met, and the breakage fault of the support shaft is easily caused; secondly, the thickness of the axle housing lug reinforcing ribs is 16mm, the reinforcing ribs are not supported to the edges of the matching surfaces of the frame lug seats, and the axle housing lug seats are easy to break under heavy load working conditions; thirdly, the tooth part of the inner gear ring is subjected to taper deformation after gear shaping heat treatment, and the gear ring is high in cracking failure rate.

Disclosure of Invention

The utility model aims at overcoming above-mentioned defect, providing a simple structure, preparation and maintenance cost are low, long service life's a 18 tons of fork installation transaxles to easily cause axle housing ear seat fracture and the high problem of ring gear fracture fault rate when solving among the prior art wheel limit supporting bearing load capacity not enough, the heavy load operating mode.

In order to achieve the purpose, the drive axle of the 18-ton forklift loader of the utility model takes the axle housing 3 and the support shaft 5 as bearing parts after being welded, wheel edge assemblies 1 are supported at two sides, a main reducer assembly 4 is arranged in the middle of the axle housing 3, and the wheel edge assemblies 1 and the main reducer assembly 4 are connected at two sides of the half shaft 2; the inner hole of the wheel shell 8 is respectively provided with a tapered roller bearing 32028 as an inner bearing 6 and a tapered roller bearing 32224 as an outer bearing 22 to enhance the bearing capacity, and the two bearings are supported on the support shaft 5, and a spacer 7 is arranged between the outer bearing 22 and the support shaft 5; the planet wheel carrier 11 is installed together with the wheel shell 8 through a rim bolt 9, a rim nut 10, and the joint surfaces are sealed through an O-shaped ring 21; an inner hole spline of the inner gear ring 20 is matched with a spline of the support shaft 5 and locked through a round nut 17 on the end surface, and meanwhile, the looseness prevention is carried out through a screw 18; an inner hole of the planet wheel 15 is arranged in an installation hole of the planet wheel carrier 11 through a needle roller 19 and a planet wheel shaft 13, and two end faces of the planet wheel 15 are arranged in an installation hole of the planet wheel carrier 11 through a planet wheel gasket 14, and meanwhile, a steel ball 12 is arranged at the end part of the planet wheel shaft 13 for axial limiting; the axle housing 3 is provided with an axle housing lug seat 23 with an axle housing lug seat reinforcing rib 24, the wall thickness of the axle housing lug seat reinforcing rib 24 is 20mm, and the axle housing lug seat reinforcing rib 24 extends to the edge of the matching surface of the frame and the lug seat so as to meet the requirement of heavy-load working conditions; and the inner gear ring 20 is subjected to reverse modification during machining according to the collected heat treatment deformation trend data during gear shaping, so that the tooth part is corrected after heat treatment to improve the precision.

The drive axle of the 18-ton fork loader with the structure has the following technical characteristics and beneficial effects:

1. the inner and outer bearing positions of the wheel edge supporting shaft adopt larger diameters

And

tapered roller bearings 32028 and 32224 are selected for corresponding bearingsThe bearing capacity is enhanced, and the strength of the support shaft can meet the requirement of heavy-load working conditions;

2. the thickness of the axle housing lug reinforcing ribs is increased from 16mm to 20mm, and the reinforcing ribs extend to the edges of the matching surfaces of the frame lug seats, so that the strength of the axle housing lug seats can meet the requirement of heavy-load working conditions;

3. and deformation trend data is collected during gear shaping of the internal gear ring, reverse modification is carried out during machining, the tooth part is corrected after heat treatment, and the precision is greatly improved.

4. The manufacturing and maintenance cost is low, and the reliability of the drive axle can be obviously improved.

Drawings

Fig. 1 is the utility model discloses a 18 ton fork installation transaxle owner is cut away the schematic diagram.

Fig. 2 is a schematic sectional view of a part of the rim portion of fig. 1.

FIG. 3 is a schematic cross-sectional view of the axle housing structure of FIG. 1.

FIG. 4 is a schematic cross-sectional view of the axle housing ear block of FIG. 1.

Fig. 5 is a cross-sectional view of the ring gear in fig. 1.

Reference numerals: the wheel hub assembly comprises a wheel rim assembly 1, a half shaft 2, an axle housing 3, a main speed reducer assembly 4, a support shaft 5, an inner bearing 6, a spacer 7, a wheel shell 8, a rim bolt 9, a rim nut 10, a planet wheel carrier 11, a steel ball 12, a planet wheel shaft 13, a planet wheel gasket 14, a planet wheel 15, a sun wheel 16, a round nut 17, a screw 18, a needle roller 19, an inner gear ring 20, an O-shaped ring 21, an outer bearing 22, an axle housing lug seat 23 and an axle housing lug seat reinforcing rib 24.

Detailed Description

The following describes the drive axle of the 18-ton fork-lift truck in further detail with reference to the accompanying drawings and specific embodiments.

Fig. 1 shows, the utility model relates to an 18 ton fork installation transaxle regards as bearing part with axle housing 3 and back shaft 5 welding back, and both sides support wheel limit assembly 1, axle housing 3 intermediate installation main reducer assembly 4, wheel limit assembly 1 and main reducer assembly 4 are connected on 2 both sides of semi-axis.

Fig. 2 shows a wheel edge part structure of a drive axle of an 18-ton fork-lift loader, wherein a tapered roller bearing 32028 as an inner bearing 6 and a tapered roller bearing 32224 as an outer bearing 22 are respectively arranged in an inner hole of a wheel shell 8 and are supported on a support shaft 5 through the two bearings, and a spacer 7 is arranged between the outer bearing 22 and the support shaft 5; the planet wheel carrier 11 is installed together with the wheel shell 8 through a rim bolt 9, a rim nut 10, and the joint surfaces are sealed through an O-shaped ring 21; an inner hole spline of the inner gear ring 20 is matched with a spline of the support shaft 5 and locked through a round nut 17 on the end surface, and meanwhile, the looseness prevention is carried out through a screw 18; the inner hole of the planet wheel 15 is arranged in the mounting hole of the planet wheel carrier 11 through a needle roller 19 and a planet wheel shaft 13, and the two end faces of the planet wheel 15 are arranged in the mounting hole through a planet wheel gasket 14, and meanwhile, the end part of the planet wheel shaft 13 is provided with a steel ball 12 for axial limiting.

As shown in fig. 3-4, the axle housing 3 is provided with axle housing ear seats 23 having axle housing ear seat reinforcing ribs 24, the wall thickness of the axle housing ear seat reinforcing ribs 24 is 20mm, and the reinforcing ribs extend to the edges of the matching surfaces of the frame and the ear seats.

And when the inner gear ring 20 shown in the figure 5 is subjected to gear shaping, reverse modification is carried out according to the collected heat treatment deformation trend data, the tooth part is corrected after heat treatment, and the precision is greatly improved.

The utility model relates to a principle of 18 tons of fork installation transaxles carries out the one-level speed reduction with the power of gearbox transmission through main reducer assembly 4, and the moment of torsion is transmitted roadside assembly 1 through semi-axis 2 again and is carried out the second grade and slow down, finally reaches the tire with power and realizes the motion.

The utility model discloses make improvement and optimization to prior art, adopt two inside and outside bearing position diameters of back shaft 5 respectively

And

the corresponding bearings adopt a tapered roller bearing 32028 as an inner bearing 6 and a tapered roller bearing 32224 as an outer bearing 22, the wall thickness of a reinforcing rib 24 of an axle housing lug seat is 20mm, and the reinforcing rib extends to the edge of a matching surface of the frame and the lug seat; two optimized bearing positions of the rear support shaft 5 have larger diameters, the bearing capacity is enhanced, and the support is supportedThe shaft strength meets the requirement of heavy-load working conditions; the axle housing lug reinforcing ribs 24 are thicker in wall thickness, and the rib plates extend to the edges of the lug seats, so that the strength of the axle housing lug seats 23 can meet the requirement of heavy-load working conditions; and when the inner gear ring 20 is subjected to gear shaping, reverse modification is performed according to the collected heat treatment deformation trend data, the tooth part is corrected after heat treatment, and the precision is greatly improved. The utility model discloses finally obviously improve the transaxle reliability, increase the income of enterprise.

Claims

1. A drive axle of an 18-ton fork loader takes an axle housing (3) and a support shaft (5) as bearing parts after being welded, wheel edge assemblies (1) are supported at two sides, a main reducer assembly (4) is installed in the middle of the axle housing (3), and the wheel edge assemblies (1) and the main reducer assembly (4) are connected at two sides of a half shaft (2); an inner bearing (6) and an outer bearing (22) are respectively arranged in an inner hole of the wheel shell (8) and are supported on the supporting shaft (5) through the two bearings, and a spacer bush (7) is arranged between the outer bearing (22) and the supporting shaft (5); the planet wheel carrier (11) is installed together with the wheel shell (8) through a rim bolt (9), a rim nut (10), and joint surfaces are sealed through an O-shaped ring (21); an inner hole spline of the inner gear ring (20) is matched with a spline of the support shaft (5) and locked through a round nut (17) on the end surface, and meanwhile, a screw (18) is used for preventing looseness; an inner hole of the planet wheel (15) is installed in an installation hole of the planet wheel carrier (11) through a rolling needle (19), a planet wheel shaft (13) and two end faces of the planet wheel (15) through a planet wheel gasket (14), and meanwhile, a steel ball (12) is installed at the end part of the planet wheel shaft (13) for axial limiting; the axle housing (3) is provided with an axle housing lug seat (23) with an axle housing lug seat reinforcing rib (24); the method is characterized in that: the inner bearing (6) adopts a tapered roller bearing 32028, and the outer bearing (22) adopts a tapered roller bearing 32224 so as to enhance the bearing capacity; axle housing ear seat strengthening rib (24) wall thickness adopts 20mm to extend this axle housing ear seat strengthening rib (24) to the fitting surface edge of frame and ear seat, in order to satisfy heavy load operating mode requirement.