CN213954193U

CN213954193U - Spline universal joint

Info

Publication number: CN213954193U
Application number: CN202022168547.6U
Authority: CN
Inventors: 周育江; 黄建根; 蒋宇鹏
Original assignee: Wanxiang Qianchao Co Ltd; Wanxiang Group Corp
Current assignee: Wanxiang Qianchao Co Ltd; Wanxiang Group Corp
Priority date: 2020-09-28
Filing date: 2020-09-28
Publication date: 2021-08-13
Anticipated expiration: 2030-09-28

Abstract

The invention discloses a spline universal joint, which mainly comprises a cross shaft and the like, wherein main parts of four cross shaft necks of the cross shaft are straight sections, the straight sections are in transition connection with a body of the cross shaft through fillets, an outer ring is sleeved on each straight section and is axially limited through the fillets, the outer ring is of an annular structure, a through hole is formed in the outer ring, the inner diameter of the through hole is matched with the outer diameter of the straight section, and an involute external spline is arranged on the outer surface of the outer ring. The cross shaft is designed into a single-shoulder structure, and the size is ensured only by turning before heat treatment; the bearing is simplified into an annular outer ring, 90% of bearing parts are reduced, and the manufacturing cost is greatly reduced; various parts in the bearing are eliminated, and meanwhile, the universal joint does not need to be maintained by using grease; only the cross shaft is matched with the outer ring, the service life of the universal joint depends on the strength of the cross shaft and the outer ring, and the problem of unstable service life of the universal joint is solved.

Description

Spline universal joint

Technical Field

The utility model relates to a field of universal joint, concretely relates to spline universal joint.

Background

The universal joint has been invented for hundreds of years, and has formed a basic structure of a cross shaft matched with a bearing along with continuous improvement and optimization, wherein the bearing is formed by combining an outer ring, a roller pin, an oil seal, a gasket and other parts, and then the cross shaft and the bearing can be effectively lubricated and work by filling lubricating grease; in addition, through parts such as an oil seal and a dust cover, grease sealing is achieved, and pollutants such as external silt are prevented from entering the bearing, so that the service life of the bearing is prolonged.

The cross shaft in the prior art has a complex structure, needs to be subjected to finish machining to form a specific outline and is assembled by matching with a roller pin, an oil seal and the like in a bearing, and mainly has the following defects: the device is assembled by a plurality of parts, and the requirement on the manufacturing precision of each part is high; oil seals, dust covers and other parts in the bearings are complex in structure and have high requirements on the skill level of designers; the existing universal joint needs to be lubricated by injecting grease, and the grease with different performances needs to be developed according to different working conditions, so that the environment is polluted after the grease is used; the existing universal joint bearing has more parts and is difficult to control the cost; the service life of the existing universal joint is influenced by multiple factors, particularly the service life of a bearing, and the service lives of different structures are different; the existing universal joint has high manufacturing and assembling precision and high requirement on the skill of an operator; in case of abnormity of the existing universal joint, the internal condition of the bearing cannot be checked, and the universal joint is difficult to disassemble and assemble.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome the not enough of prior art existence, and provide a spline universal joint.

The purpose of the utility model is accomplished through following technical scheme: the spline universal joint mainly comprises a cross shaft, an outer ring, straight sections, fillets, cross shaft necks, through holes and involute external splines, wherein the main parts of the four cross shaft necks of the cross shaft are the straight sections, the straight sections are connected with the body of the cross shaft in a fillet transition mode, the outer ring is sleeved on each straight section and is axially limited through the fillets, the outer ring is of an annular structure, the through holes are formed in the outer ring, the inner diameter of each through hole is matched with the outer diameter of each straight section, and the outer surface of the outer ring is the involute external splines.

The straight section of the cross shaft is in clearance fit with the through hole of the outer ring.

And the two ends of the outer ring are provided with dust cover devices, and the involute external spline matching part is lubricated.

The cross shaft and the outer ring are subjected to heat treatment, so that certain surface hardness is ensured.

The utility model has the advantages that: the cross shaft of the utility model is designed into a single-shoulder structure, the size is guaranteed only by turning before heat treatment, and finish machining is not needed; the bearing is simplified into an annular outer ring, 90% of bearing parts are reduced, and the manufacturing cost is greatly reduced; meanwhile, the requirement on the matching precision is reduced, and the outer ring is machined only before heat treatment and does not need to be subjected to finish machining; parts in the bearing are eliminated, the universal joint structure is simplified into 1 cross shaft and 4 outer rings, the design, manufacture, assembly and maintenance difficulty of the universal joint is greatly reduced, and meanwhile, the universal joint does not need to be maintained by using grease, so that the environment is protected; only the cooperation of cross axle and outer lane, the life-span of universal joint depends on the intensity of the two, has greatly eliminated the factor that influences the universal joint life-span, only needs to control the intensity of cross axle and outer lane well, just can obtain good universal joint life-span, has solved the unstable problem in universal joint life-span.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a structural sectional view of the present invention.

Description of reference numerals: the universal joint pin comprises a universal joint pin 1, an outer ring 2, a straight section 11, a fillet 12, a universal joint pin 13, a through hole 21 and an involute external spline 22.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings:

example (b): as shown in the attached drawings, the spline universal joint mainly comprises a cross shaft 1, an outer ring 2, a straight section 11, a fillet 12, a cross journal 13, a through hole 21 and an involute external spline 22, wherein the main parts of the four cross journals 13 of the cross shaft 1 are the straight sections 11, the straight sections 11 are in transitional connection with a body of the cross shaft 1 through the fillets 12, and the size of the single-shoulder structure is guaranteed only by turning before heat treatment and does not need to be finished. Every straight section 11 goes up suit outer lane 2, and outer lane 2 carries out the axial through fillet 12 spacing, avoids axial float volume too big. The outer ring 2 is of an annular structure, a through hole 21 is formed in the outer ring 2, the inner diameter of the through hole 21 is matched with the outer diameter of the straight section 11, and the straight section 11 of the cross shaft 1 is in clearance fit with the through hole 21 of the outer ring 2. The outer surface of the outer ring 2 is an involute external spline 22. The both ends design of outer lane 2 increases the shield device, avoids impurity such as silt to enter into the clearance in to lubricate the external spline 22 cooperation part that gradually bursts at seams. The cross shaft 1 and the outer ring 2 are subjected to heat treatment, so that certain surface hardness is ensured. Only through the matching of the cross shaft 1 and the outer ring 2, the service life of the universal joint depends on the strength of the cross shaft and the outer ring, and factors influencing the service life of the universal joint are greatly eliminated.

It should be understood that equivalent substitutions or changes to the technical solution and the inventive concept of the present invention should be considered to fall within the scope of the appended claims for the skilled person.

Claims

1. A spline gimbal, comprising: mainly including cross axle (1), outer lane (2), straight section (11), fillet (12), cross axle journal (13), through-hole (21), outer spline (22) gradually burst in the seams, four cross axle journal (13) the main part of cross axle (1) are straight section (11), fillet (12) transitional coupling is passed through with the body of cross axle (1) in straight section (11), suit outer lane (2) are gone up in every straight section (11), outer lane (2) carry out axial spacing through fillet (12), outer lane (2) are the loop configuration, outer lane (2) inside is through-hole (21), through-hole (21) internal diameter and straight section (11) external diameter fit, outer lane (2) surface is outer spline (22) gradually burst in the seams.

2. The spline joint according to claim 1, wherein: the straight section (11) of the cross shaft (1) is in clearance fit with the through hole (21) of the outer ring (2).

3. The spline joint according to claim 1, wherein: and dust cover devices are additionally arranged at two ends of the outer ring (2) and used for lubricating the matching part of the involute external spline (22).

4. The spline joint according to claim 1, wherein: the cross shaft (1) and the outer ring (2) are both subjected to heat treatment.