CN110670661A

CN110670661A - Wheel edge support

Info

Publication number: CN110670661A
Application number: CN201910892988.XA
Authority: CN
Inventors: 丁亮; 钱珍宝; 汪琰; 周良稷; 刘勇涛; 史骞
Original assignee: Jiangsu Liugong Machinery Co Ltd
Current assignee: Liugong Changzhou Machinery Co Ltd
Priority date: 2019-09-20
Filing date: 2019-09-20
Publication date: 2020-01-10

Abstract

A wheel-side support comprises a supporting shaft, a supporting seat, a first sealing element, a first bearing, a second bearing and a bushing; the supporting shaft does circular motion relative to the supporting seat, one end of the supporting shaft is connected with a tire rim, and the other end of the supporting shaft is connected with a chain wheel; the wheel side support comprises a supporting shaft, a supporting seat, a first sealing element, a first bearing, a second bearing and a lining in sequence from the tire rim to the direction of the chain wheel; the wheel edge support further comprises a second sealing element, and the second sealing element is arranged between the first bearing and the second bearing; the supporting seat is provided with an oil filling hole along the radial direction, and the oil filling hole is shielded by a screw plug; the supporting seat, the first sealing element and the second sealing element form a closed oil cavity. The wheel edge support has a compact structure, is convenient to manufacture and maintain, can fully lubricate a bearing, can improve the reliability of a supporting shaft, and further prolongs the service life of the wheel edge support.

Description

Wheel edge support

Technical Field

The invention relates to a transmission device, in particular to a wheel edge support of a skid steer loader, and belongs to the technical field of engineering machinery.

Background

The skid steer loader is also called a skid steer loader, a multifunctional engineering vehicle and a multifunctional engineering machine, and is wheel type special chassis equipment for realizing vehicle steering by utilizing linear velocity difference of wheels at two sides. The wheel side supporting device of the skid steer loader transmits the output torque of the walking motor to the tire side, and the walking and steering functions are realized. The performance and serviceability of the wheel-side support therefore has a significant impact on the performance of the skid-steer loader.

The lubrication of the wheel-side support inner bearing is of great importance to the performance of the wheel-side support, in order to ensure the lubrication of the wheel-side support inner bearing, or the wheel-side support is designed to be closed, for example, in the patent of 'wheel-side transmission device of skid loader' with the application number of CN201520697782.9, the lubrication effect of the wheel-side support is good, but the requirements on sealing performance and machining are high, and the manufacturing stability is not high. Or the wheel side support is designed to be open, such as the patent of 'wheel side support of skid loader' with the application number of CN201910416720.9, namely the bearing is lubricated by injecting grease through a grease channel, but the reliability of the supporting shaft is seriously affected due to the existence of the grease channel, and the fatigue fracture of the supporting shaft is easily caused.

Disclosure of Invention

The purpose of the invention is as follows: the invention aims to solve the problems and provides a reliable wheel edge support with good lubricating effect.

The technical scheme is as follows: a wheel-side support comprises a supporting shaft, a supporting seat, a first sealing element, a first bearing, a second bearing and a bushing; the supporting shaft does circular motion relative to the supporting seat, one end of the supporting shaft is connected with a tire rim, and the other end of the supporting shaft is connected with a chain wheel; the wheel side support comprises a supporting shaft, a supporting seat, a first sealing element, a first bearing, a second bearing and a lining in sequence from the tire rim to the direction of the chain wheel; the wheel edge support further comprises a second sealing element, and the second sealing element is arranged between the first bearing and the second bearing; the supporting seat is provided with an oil filling hole along the radial direction, and the oil filling hole is shielded by a screw plug; the supporting seat, the first sealing element and the second sealing element form a closed oil cavity. And hydraulic oil or grease is injected from the oil injection hole to fill the oil cavity and lubricate the first bearing, and the second bearing is lubricated by the splashed oil in the chain case.

Preferably, in order to improve the sealing performance of the closed oil cavity, the first sealing element is a box-type oil seal; the second sealing element is a sealing ring which is embedded in the supporting seat.

Preferably, for cost saving and convenient maintenance, the first sealing element and the second sealing element are box-type oil seals.

Preferably, in order to ensure the reliability of the first bearing lubrication, the oil chamber comprises a main oil storage chamber and a secondary oil storage chamber; the wheel edge support comprises a supporting shaft, a supporting seat, a first sealing element, a first bearing, a secondary oil storage cavity, a main oil storage cavity, a second sealing element, a second bearing and a bushing in sequence from a tire rim to a chain wheel.

Has the advantages that: the invention has compact structure and convenient manufacture and maintenance, can fully lubricate the bearing, can improve the reliability of the supporting shaft, and further improves the service life of the wheel edge support.

Drawings

FIG. 1 is a schematic cross-sectional view of the mounting structure of the present invention;

FIG. 2 is a schematic cross-sectional view of the wheel rim support of the present invention;

FIG. 3 is a schematic cross-sectional view of the wheel rim support of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described in detail with reference to the accompanying drawings and preferred embodiments, which are only for illustrating the present invention and are not intended to limit the scope of the present invention.

As shown in fig. 1, 2 and 3, the wheel-side bearing comprises a supporting shaft 1, a supporting seat 2, a first sealing element 3, a first bearing 4, a second bearing 5 and a bushing 6; the supporting shaft 1 makes circular motion relative to the supporting seat 2, one end of the supporting shaft 1 is connected with a tire rim 7 through a bolt, and the other end of the supporting shaft is connected with a chain wheel 8. The supporting shaft 1 is locked with the chain wheel 8 through a gland and a bolt, and the axial clearance is adjusted through an adjusting pad. The bush 6 can effectively ensure the effectiveness of the spline connection of the chain wheel 8 and the supporting shaft 1. The wheel side support comprises a supporting shaft 1, a supporting seat 2, a first sealing element 3, a first bearing 4, a second bearing 5 and a bush 6 in sequence from a tire rim 7 to a chain wheel 8; the wheel-side support further comprises a second sealing element 9, and the second sealing element 9 is arranged between the first bearing 4 and the second bearing 5; the supporting seat 2 is provided with an oil filling hole 10 along the radial direction, and the oil filling hole 10 is shielded by a screw plug 11; the bearing seat 2, the first sealing element 3 and the second sealing element 9 form a closed oil chamber 12.

Since the sealing ring 91 is embedded in the bearing housing 2, the sealing property of the oil chamber 12 can be effectively ensured, and the second sealing member 9 can be the sealing ring 91. In order to reduce the cost and improve the maintainability, the second seal 9 may be a cartridge type oil seal. To ensure effective lubrication of the first bearing 4, the oil chamber 12 includes a main oil-reserving chamber 121 and a sub oil-reserving chamber 122; the wheel side support comprises a support shaft 1, a support seat 2, a first sealing member 3, a first bearing 4, a secondary oil storage cavity 122, a main oil storage cavity 121, a second sealing member 9, a second bearing 5 and a bush 6 in sequence from a tire rim 7 to a chain wheel 8. Hydraulic oil or grease is injected from the oil filler hole 10 to fill the main oil reservoir chamber 121 and the sub oil reservoir chamber 122, the sub oil reservoir chamber 122 can effectively ensure the lubrication of the first bearing 4, and the main oil reservoir chamber 121 can supplement the sub oil reservoir chamber 122 when the oil is reduced or not. The second seal 9 and the oil chamber 12 side do not have the secondary oil reservoir chamber 122 but have a step, and oil leakage due to early failure of the second seal 9 can be reduced.

Although the present invention has been described in detail with reference to the embodiments, it will be understood by those skilled in the art that the present invention may be modified or changed without departing from the spirit of the present invention, and still fall within the scope of the present invention.

Claims

1. A wheel-side support comprises a supporting shaft (1), a supporting seat (2), a first sealing element (3), a first bearing (4), a second bearing (5) and a bushing (6); the supporting shaft (1) does circular motion relative to the supporting seat (2), one end of the supporting shaft (1) is connected with a tire rim (7), and the other end of the supporting shaft is connected with a chain wheel (8); the wheel side support comprises a supporting shaft (1), a supporting seat (2), a first sealing element (3), a first bearing (4), a second bearing (5) and a lining (6) in sequence from a tire rim (7) to a chain wheel (8); the method is characterized in that: the wheel-side support further comprises a second sealing element (9), and the second sealing element (9) is arranged between the first bearing (4) and the second bearing (5); an oil filling hole (10) is formed in the support seat (2) along the radial direction, and the oil filling hole (10) is shielded by a screw plug (11); the supporting seat (2), the first sealing element (3) and the second sealing element (9) form a closed oil cavity (12).

2. The wheel edge support according to claim 1, wherein: the first sealing piece (3) is a box-type oil seal; the second sealing element (9) is a sealing ring (91), and the sealing ring (91) is embedded in the supporting seat (2).

3. The wheel edge support according to claim 1, wherein: the first sealing piece (3) and the second sealing piece (9) are box-type oil seals.

4. The wheel edge support according to any one of claims 1 to 3, wherein: the oil chamber (12) comprises a main oil-accumulating chamber (121) and a secondary oil-accumulating chamber (122); the wheel side support is sequentially provided with a supporting shaft (1), a supporting seat (2), a first sealing element (3), a first bearing (4), a secondary oil storage cavity (122), a main oil storage cavity (121), a second sealing element (9), a second bearing (5) and a lining (6) from a tire rim (7) to a chain wheel (8).