CN217918075U

CN217918075U - Large-angle steering transmission shaft assembly

Info

Publication number: CN217918075U
Application number: CN202221577678.2U
Authority: CN
Inventors: 夏剑虹; 徐华福; 张军
Original assignee: Wanxiang Group Corp; Wanxiang Qianchao Transmission Shaft Co Ltd
Current assignee: Wanxiang Group Corp; Wanxiang Qianchao Transmission Shaft Co Ltd
Priority date: 2022-06-22
Filing date: 2022-06-22
Publication date: 2022-11-29
Anticipated expiration: 2032-06-22

Abstract

The utility model discloses a large-angle steering transmission shaft assembly, which relates to the field of steering transmission shaft assemblies and comprises a spline housing, a spline shaft and two AC-type ball cages, wherein one end of the spline housing is fixed with one AC-type ball cage, the spline shaft is fixed with the other AC-type ball cage, and a spline sliding pair is formed between the spline housing and the spline shaft; the AC type ball cage comprises a shaft head and a ball cage shell, wherein a conical pit is formed in one end A, facing the ball cage shell, of the shaft head, the end A is sleeved on the star-shaped sleeve, a plurality of steel balls are kept between the star-shaped sleeve and the ball cage shell, and a thimble is movably arranged on the inner wall of the ball cage shell along the axial direction; the thimble is supported on the conical concave pit, the contact position of the thimble and the conical concave pit is taken as a center, and the spindle head swings around the center. The utility model adopts the design of the shaft head inside the ball cage and the 90-degree conical pit of the star-shaped sleeve, thereby meeting the requirement of large turning angle; and a pretightening force of a compression spring is adopted to eliminate the gaps between the star-shaped sleeve and the steel ball and between the steel ball and the ball cage shell and reach the zero gap inside the ball cage.

Description

Large-angle steering transmission shaft assembly

Technical Field

The utility model relates to a field of steering transmission shaft assembly, concretely relates to large-angle steering transmission shaft assembly.

Background

As shown in the attached figure 1, the conventional steering transmission shaft assembly at present consists of a joint fork (1 ') + a universal joint (2') + a welding fork (3 ') + a spline sleeve (4') + a spline shaft (5 ') + a welding fork (3') + a universal joint (2 ') + a joint fork (1'), wherein both ends are universal joints (2 '), and the middle is a spline telescopic pair (6').

However, by adopting the technical scheme, the maximum rotation angle close to the steering wheel end is only 30 degrees in the actual loading and using process, and the use requirement cannot be met if the maximum rotation angle exceeds the rotation angle.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome the not enough of prior art existence, and provide a wide-angle steering transmission shaft assembly, can satisfy installation operation requirement of wider angle (45 degrees the biggest).

The purpose of the utility model is accomplished through following technical scheme: the large-angle steering transmission shaft assembly comprises a spline housing, a spline shaft and two AC type ball cages, wherein one AC type ball cage is fixed at one end of the spline housing, the spline shaft is connected to the spline housing in a sliding mode and extends out of the other end of the spline housing, the other AC type ball cage is fixed on the spline shaft, and a spline sliding pair is formed between the spline housing and the spline shaft; the AC type ball cage comprises a shaft head and a ball cage shell, wherein a conical pit is formed in one end A, facing the ball cage shell, of the shaft head, the end A is sleeved on the star-shaped sleeve, a plurality of steel balls are retained between the outer wall of the star-shaped sleeve and the inner wall of the ball cage shell through a retainer, and a thimble is movably arranged on the inner wall of the ball cage shell along the axial direction; the thimble is propped against the conical concave pit, the contact position of the thimble and the conical concave pit is taken as a center, and the spindle head swings around the center; one end B of the shaft head, which is far away from the ball cage shell, is used for connecting a steering gear or a steering column, and a protective sleeve is arranged between the end B and the outer wall of the ball cage shell.

As a further technical scheme, a spring groove is axially formed in the inner wall of one side, away from the shaft head, of the ball cage shell, and the tail portion of the ejector pin is movably arranged in the spring groove through a spring.

As a further technical scheme, a gasket is riveted at the opening part of the spring groove, the gasket stops the tail part of the ejector pin, and the head part of the ejector pin penetrates through the gasket and is propped against the conical concave pit.

As a further technical scheme, transition fillets are arranged at the top corners of the conical pits.

As a further technical scheme, the head of the thimble adopts circular arc transition for matching with a transition fillet.

As a further technical solution, the apex angle of the conical depressions is 90 °.

As a further technical scheme, a conical opening part is arranged at the position, corresponding to the conical concave pit, on the star-shaped sleeve and used for being matched with the thimble; the opening angle of the tapered mouth portion is also 90 °.

As a further technical scheme, the star-shaped sleeve is in interference fit with the end A, and clamping grooves are formed in the inner wall of the star-shaped sleeve and the outer wall of the end A at opposite positions for placing clamping rings; the clamping ring is used for limiting the axial sliding of the shaft head.

As a further technical scheme, a blind hole is formed in the end B, and an internal spline is arranged on the inner wall of the blind hole and used for being matched with an external spline of a steering gear or a steering column.

As a further technical scheme, the shaft head, the thimble and the ball cage shell are coaxially arranged; the swing angle of the shaft head is 0-45 degrees.

The utility model has the advantages that:

1. the design of a shaft head inside the ball cage and a 90-degree conical pit of the star-shaped sleeve is adopted, so that the requirement of a large turning angle is met;

2. and a pretightening force of a compression spring is adopted to eliminate the gaps between the star-shaped sleeve and the steel ball and between the steel ball and the ball cage shell and reach the zero gap inside the ball cage.

Drawings

Fig. 1 is a schematic structural diagram of the prior art.

Fig. 2 is a schematic structural diagram of the present invention.

Fig. 3 is a schematic structural view of the AC-type ball cage of the present invention.

Fig. 4 is a schematic structural diagram of the middle shaft head of the present invention.

Fig. 5 is a schematic structural diagram of the middle star-shaped sleeve of the present invention.

Fig. 6 is a schematic structural view of the middle shaft head of the present invention when the swing angle is 0 °.

Fig. 7 is a schematic structural view of the middle shaft head of the present invention when the swing angle is 40 °.

Description of reference numerals: the spline shaft comprises a joint yoke 1', a universal joint 2', a welding yoke 3', a spline housing 4', a spline shaft 5 'and a spline telescopic pair 6'; the novel ball cage comprises an AC type ball cage 100, a shaft head 101, a protective sleeve 102, a retainer 103, a steel ball 104, a snap ring 105, a star-shaped sleeve 106, a thimble 107, a gasket 108, a spring 109, a ball cage shell 110, a conical recess 111, an end A112, an end B113, a spring groove 114, a transition fillet 115, a conical opening 116, a clamping groove 117, a blind hole 118, an internal spline 119, a spline sleeve 200, a spline shaft 300 and a spline sliding pair 400.

Detailed Description

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

example (b): as shown in fig. 2 to 7, the large-angle steering transmission shaft assembly includes a spline housing 200, a spline shaft 300, and two AC-type ball cages 100, wherein one AC-type ball cage 100 is fixed to one end of the spline housing 200, and a cage housing 110 of the AC-type ball cage 100 is welded to an end of the spline housing 200. The spline shaft 300 is slidably connected to the spline housing 200 and extends out from the other end of the spline housing 200, another AC-type ball cage 100 is fixed on the spline shaft 300, the ball cage housing 110 of the AC-type ball cage 100 is welded and fixed to the end of the spline shaft 300, and a spline sliding pair 400 is formed between the spline housing 200 and the spline shaft 300, as shown in fig. 2. Referring to fig. 3, 4 and 5, the AC-type ball cage 100 includes a shaft head 101 and a cage shell 110, wherein a tapered recess 111 is formed in an end a112 of the shaft head 101 facing the cage shell 110, and the end a112 is sleeved on the inner race 106. A plurality of steel balls 104 are kept between the outer wall of the star-shaped sleeve 106 and the inner wall of the ball cage shell 110 through a retainer 103. The inner wall of the ball cage shell 110 is movably provided with a thimble 107 along the axial direction, the thimble 107 is propped against the conical pit 111, the contact position of the thimble 107 and the conical pit is taken as the center, the shaft head 101 swings around the center, and the swinging process can refer to fig. 6 and 7. One end B113 of the shaft head 101, which is far away from the ball cage shell 110, is used for connecting a steering machine or a steering column, and a protective sleeve 102 is arranged between the end B113 and the outer wall of the ball cage shell 110.

Further, referring to fig. 3, a spring groove 114 is axially formed in an inner wall of the ball cage housing 110 on a side away from the shaft head 101, and a tail portion of the thimble 107 is movably disposed in the spring groove 114 through a spring 109. A gasket 108 is riveted at the mouth of the spring groove 114, the gasket 108 stops the tail of the thimble 107, and the head of the thimble 107 passes through the gasket 108 and abuts against the conical recess 111.

Preferably, referring to fig. 4 and 5, transition fillets 115 are provided at the top corners of the conical depressions 111. The head of the thimble 107 adopts circular arc transition for matching with a transition fillet 115. The apex angle α of the conical depressions 111 is 90 °. A conical opening 116 is formed in the position, corresponding to the conical concave 111, of the star-shaped sleeve 106 and used for being matched with the thimble 107; the opening angle β of the tapered mouth portion 116 is also 90 °.

Preferably, the star sleeve 106 is in interference fit with the end a112, and clamping grooves 117 are formed in opposite positions on the inner wall of the star sleeve 106 and the outer wall of the end a112 and used for placing the snap ring 105; the snap ring 105 is used to limit the axial sliding of the stub shaft 101.

Preferably, the end B113 is provided with a blind hole 118, and an internal spline 119 (which may be formed by cold extrusion) is provided along an inner wall of the blind hole 118 for engaging with an external spline of a steering gear or steering column.

Referring to fig. 6 and 7, the shaft head 101, the thimble 107 and the ball cage housing 110 are coaxially arranged; the range of the swing angle γ of the spindle head 101 is 0 to 45 °, and the swing angle γ is 40 ° in fig. 7.

The utility model discloses a theory of operation: the end B113 of the shaft head 101 is connected to a steering gear or a steering column through a spline, the end A112 of the shaft head 101 is sleeved with the star-shaped sleeve 106, the star-shaped sleeve and the star-shaped sleeve are in interference fit, and the shaft head 101 is prevented from axially sliding and falling off through the clamping ring 105; the steel balls 104 are held by the retainer 103, one end of the steel ball 104 is in contact with the outer wall of the inner race 106, and the other end of the steel ball 104 is in contact with the inner raceway on the cage housing 110. Through the swing of the shaft head 101, the swing angle requirement of the steering transmission shaft can be met by the ball cage. Considering the requirement of a large turning angle and the requirement of matching with an external spline of a steering gear or a steering column, the end B113 of the shaft head 101 is provided with a blind hole 117 with an internal spline 119, and the end A112 of the shaft head 101 is designed into a 90-degree conical pit 111 (shown in figure 4) with a rounded bottom. One end of the star-shaped sleeve is also designed to be a 90-degree conical opening part 116 (refer to fig. 5), the head part of the thimble 107 adopts an arc transition structure, the thimble 107 is jacked and fixed in the conical concave pit 111 of the shaft head 101, and a large swing angle gamma can be generated through the 90-degree conical structure, and as shown in fig. 7, the swing angle gamma ranges from 0 to 45 degrees. In order to eliminate the clearance between the steel ball 104 in the ball cage and the star-shaped sleeve 106 as well as the ball cage shell 110, the head of the thimble 107 is riveted on the ball cage shell 110 through a sleeved gasket 108, the tail of the thimble is assembled in the ball cage shell 110 through a compressed spring 109, and the clearance between the star-shaped sleeve 106 and the steel ball 104 as well as between the steel ball 104 and the ball cage shell 110 is eliminated through a pre-tightening thrust generated by the compressed spring, so as to achieve zero clearance in the ball cage.

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. The utility model provides a steering drive shaft assembly of wide angle which characterized in that: the spline shaft comprises a spline housing (200), a spline shaft (300) and two AC-type ball cages (100), wherein one AC-type ball cage (100) is fixed at one end of the spline housing (200), the spline shaft (300) is connected to the spline housing (200) in a sliding mode and extends out of the other end of the spline housing (200), the other AC-type ball cage (100) is fixed on the spline shaft (300), and a spline sliding pair (400) is formed between the spline housing (200) and the spline shaft (300); the AC-type ball cage (100) comprises a shaft head (101) and a ball cage shell (110), wherein a conical concave pit (111) is formed in one end A (112) of the shaft head (101) facing the ball cage shell (110), the end A (112) is sleeved on a star-shaped sleeve (106), a plurality of steel balls (104) are kept between the outer wall of the star-shaped sleeve (106) and the inner wall of the ball cage shell (110) through a retainer (103), and a thimble (107) is movably arranged on the inner wall of the ball cage shell (110) along the axial direction; the thimble (107) is propped against the conical pit (111), the contact position of the thimble and the conical pit is taken as a center, and the shaft head (101) swings around the center; one end B (113) of the shaft head (101), which is far away from the ball cage shell (110), is used for connecting a steering machine or a steering column, and a protective sleeve (102) is arranged between the end B (113) and the outer wall of the ball cage shell (110).

2. A high angle steering drive shaft assembly according to claim 1, wherein: a spring groove (114) is formed in the inner wall of one side, away from the shaft head (101), of the ball cage shell (110) in the axial direction, and the tail portion of the ejector pin (107) is movably arranged in the spring groove (114) through a spring (109).

3. A high angle steering drive shaft assembly according to claim 2, wherein: the mouth of the spring groove (114) is riveted with a gasket (108), the gasket (108) stops the tail of the thimble (107), and the head of the thimble (107) penetrates through the gasket (108) and is propped against the conical pit (111).

4. A high angle steering drive shaft assembly according to claim 1 or 3, wherein: transition fillets (115) are arranged at the top corners of the conical pits (111).

5. The high angle steering drive shaft assembly of claim 4, wherein: the head of the thimble (107) adopts circular arc transition and is used for matching with a transition fillet (115).

6. A high angle steering drive shaft assembly according to claim 1 or 3, wherein: the apex angle of the conical depressions (111) is 90 °.

7. The wide angle steering drive shaft assembly of claim 6, wherein: a conical opening (116) is formed in the position, corresponding to the conical concave pit (111), of the star-shaped sleeve (106) and used for being matched with the thimble (107); the opening angle of the tapered mouth portion (116) is also 90 degrees.

8. A high angle steering drive shaft assembly according to claim 1, wherein: the star-shaped sleeve (106) is in interference fit with the end A (112), and clamping grooves (117) are formed in opposite positions on the inner wall of the star-shaped sleeve (106) and the outer wall of the end A (112) and used for placing clamping rings (105); the snap ring (105) is used for limiting the axial sliding of the shaft head (101).

9. A high angle steering drive shaft assembly according to claim 1, wherein: a blind hole (118) is formed in the end B (113), and an internal spline (119) is arranged on the inner wall of the blind hole (118) and used for being matched with an external spline of a steering gear or a steering column.

10. A high angle steering drive shaft assembly according to claim 1, wherein: the shaft head (101), the thimble (107) and the ball cage shell (110) are coaxially arranged; the swing angle of the shaft head (101) is 0-45 degrees.