CN214404413U

CN214404413U - Fixed end ball cage type constant velocity universal joint

Info

Publication number: CN214404413U
Application number: CN202022082696.0U
Authority: CN
Inventors: 赵杰; 吴平平; 颜杭奇
Original assignee: Wanxiang Qianchao Co Ltd; Wanxiang Group Corp
Current assignee: Wanxiang Qianchao Co Ltd; Wanxiang Group Corp
Priority date: 2020-09-22
Filing date: 2020-09-22
Publication date: 2021-10-15
Anticipated expiration: 2030-09-22

Abstract

The utility model discloses a stiff end rzeppa constant velocity universal joint, it is main including the bell shell, the starlike sleeve etc, the sphere is formed with along a plurality of lanes of axial extension in the bell shell, the starlike sleeve ectosphere is formed with a plurality of lanes in pairs with the lane of bell shell, press from both sides between the lane of bell shell and the lane of starlike sleeve and establish a plurality of steel balls and transmission torque, the steel ball keeps through the holder, the holder has the ectosphere and the interior sphere of the ectosphere complex of the interior sphere with the bell shell and the starlike sleeve, the lane of bell shell, the starlike sleeve divide into A lane and B lane two kinds. The utility model discloses the circumference is disposed the opposite cross lane in pairs on bell shell and star cover, can offset the axial force that acts on the holder to reduce the holder and the friction wear of bell shell and star cover sphere, reduced calorific capacity, improved transmission efficiency; meanwhile, the non-crossed lane is adjacent to the crossed lane, so that the small end distance between the adjacent lanes is increased, and the strength is improved.

Description

Fixed end ball cage type constant velocity universal joint

Technical Field

The utility model relates to a field of constant velocity universal joint, concretely relates to stiff end rzeppa constant velocity universal joint.

Background

The prior fixed end rzeppa constant velocity joint mainly comprises the following structures: an outer race 1 having an inner spherical surface formed with a plurality of ball tracks extending in an axial direction and having an opening side 6 and an inner side 5 which are separated in the axial direction; a star sleeve 2 having a plurality of ball tracks formed on an outer spherical surface in pairs with the ball tracks of the outer race 1; a plurality of steel balls 4 which are clamped between the ball way of the outer race 1 and the ball way of the inner race 2 and transmit torque; and a cage 3 that holds the steel balls 4 and has an outer spherical surface and an inner spherical surface that are fitted with the inner spherical surface of the outer race 1 and the outer spherical surface of the inner race 2. The centers of the inner spherical surface of the outer shell 1, the outer spherical surface of the inner race 2, the outer spherical surface of the retainer 3 and the inner spherical surface are all coincided with the center O point of the universal joint cage. Center of lane O of bell housing 1₂And the lane center O of the inner race 2₁The center of the relative universal joint is reversely biased, and the offset distances are equal. In a state where the operating angle is 0 °, wedge angles are formed between the ball tracks facing the outer race 1 and the inner race 2 due to the offset, and the wedge angles are each open toward the opening side of the outer race 1 and have a size α.

In the prior art, the ball path of the outer race 1 and the ball path of the inner race 2 act on the axial force of the steel ball 4 to push the outer spherical surface of the retainer 3 to contact with the inner spherical surface of the outer race 1 and the outer spherical surface of the inner race 2 to contact with the inner spherical surface of the retainer 3. This results in severe frictional wear between the spherical surfaces at these locations during operation, which is detrimental to the low heat generation and high efficiency of the fixed end rzeppa joint.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome the not enough of prior art existence, and provide a stiff end rzeppa constant velocity universal joint.

The purpose of the utility model is accomplished through following technical scheme: the fixed end ball cage type constant velocity universal joint mainly comprises a bell housing, an inner race, a retainer, steel balls, an inner side, an opening side, a ball path A and a ball path B, wherein a plurality of ball paths extending along the axial direction are formed on the inner spherical surface of the bell housing, the opening side and the inner side are separated in the axial direction, a plurality of ball paths paired with the ball paths of the bell housing are formed on the outer spherical surface of the inner race, a plurality of steel balls are clamped between the ball paths of the bell housing and the ball paths of the inner race and transmit torque, the steel balls are retained by the retainer, the retainer is provided with an outer spherical surface and an inner spherical surface which are matched with the inner spherical surface of the bell housing and the outer spherical surface of the inner race, and the ball paths of the inner race are divided into the ball path A and the ball path B.

The ball path A is of a non-crossed type, the ball paths of the bell-shaped shell and the star-shaped sleeve are a single arc at the ball path A, the center of the ball path is superposed with the center O of the universal joint, the ball path of the bell-shaped shell and the ball path of the star-shaped sleeve are concentric, and the formed wedge angle is 0 degree.

The ball way B is of a cross type, the plane of the ball way central line of the ball way of the bell-shaped shell ball way at the ball way B inclines relative to the axis N-N of the universal joint, the inclination directions of two adjacent inclined ball ways in the circumferential direction are opposite, the ball way of the star-shaped sleeve and the ball way of the bell-shaped shell form mirror symmetry in pairs relative to the plane B-B, and the inclination angle is theta.

The number of steel balls is preferably 8.

The utility model has the advantages that: the utility model discloses dispose mated reverse cross lane in bell-shaped shell and star cover circumference, through crossing lane opposite direction slope, the axial force direction that produces the steel ball is also opposite, can offset the axial force that acts on the holder to reduce the holder and the friction wear of bell-shaped shell and star cover sphere, reduced calorific capacity, improved transmission efficiency; meanwhile, the non-crossed lane is adjacent to the crossed lane, so that the problem that the distance between the adjacent lanes is large at one end and small at the other end due to the fact that the lanes incline is solved, the small-end distance between the adjacent lanes is increased, and the strength is improved.

Drawings

Figure 1 is an end view of a prior art structure.

Fig. 2 is a sectional view of a structure of the prior art.

Fig. 3 is a structural end view of the present invention at an operating angle of 0 °.

Fig. 4 is a structural cross-sectional view of the present invention at an operating angle of 0 °.

Fig. 5 is a schematic diagram of the paired fairway of the present invention.

Fig. 6 is an end view of the bell housing structure of the present invention.

Fig. 7 is a sectional view of the bell housing structure of the present invention.

Fig. 8 is an end view of the structure of the inner race of the present invention.

Fig. 9 is a side view of the structure of the inner race of the present invention.

Fig. 10 is a longitudinal sectional view along the center line of the crossing lane according to example 1 of the present invention.

Fig. 11 is a longitudinal sectional view along the center line of the crossing lane according to embodiment 2 of the present invention.

Fig. 12 is a longitudinal sectional view along the center line of the crossing lane according to example 3 of the present invention.

Description of reference numerals: the ball-and-socket joint comprises an outer race 1, an inner race 2, a retainer 3, steel balls 4, an inner side 5, an opening side 6, an inner race and retainer contact portion 7, an outer race and retainer contact portion 8, an A ball path 9 and a B ball path 10.

Detailed Description

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

example 1: as shown in the accompanying drawings, the fixed end rzeppa constant velocity joint mainly includes an outer race 1, an inner race 2, a retainer 3, steel balls 4, an inner side 5, an opening side 6, an a race 9, and a B race 10, wherein a plurality of races extending in the axial direction are formed on an inner spherical surface of the outer race 1, and the outer race 1 has an opening side 6 and an inner side 5 separated in the axial direction, a plurality of races paired with the races of the outer race 1 are formed on an outer spherical surface of the inner race 2, a plurality of steel balls 4 are interposed between the races of the outer race 1 and the races of the inner race 2 to transmit torque, the number of the steel balls 4 is preferably 8, and may be 6, 9, 10, 12, or the like. The steel ball 4 is held by a retainer 3, the retainer 3 has an outer spherical surface and an inner spherical surface which are matched with the inner spherical surface of the outer shell 1 and the outer spherical surface of the inner race 2, and the ball paths of the outer shell 1 and the inner race 2 are divided into a ball path A9 and a ball path B10. The lane 9A is non-crossed, the lanes of the outer bell 1 and the inner race 2 at the lane 9A are a single arc, the center of the lane is coincident with the center O of the universal joint, the lane of the outer bell 1 and the lane of the inner race 2 are concentric without offset, the formed wedge angle is 0, and no axial force is generated. The ball way B10 is of a cross type, the plane of the ball way central line of the ball way of the outer shell 1 at the ball way B10 is inclined relative to the axis N-N of the universal joint, the inclination directions of two adjacent inclined ball ways in the circumferential direction are opposite, the ball way of the inner star sleeve 2 and the ball way of the outer shell 1 are in mirror symmetry in pairs relative to the plane B-B, and the inclination angle is theta. The fairway of the bell-shaped shell 1 on the longitudinal section along the center line of the crossed fairway is a single arc, and the center of the fairway is consistent with the center of the universal joint.

Example 2: on the basis of embodiment 1, the lane of the bell housing 1 on the longitudinal section along the center line of the intersecting lane is connected by two circular arcs or is not limited to two. The second track arc R2 has a shape different from that of the first track arc R1, the first track arc R1 and the second track arc R2 are connected on the opening side 6 of the joint center O, and the track of the inner race 2 and the paired track of the outer race 1 are formed in mirror symmetry with respect to a plane B including the joint center O in a state where the operating angle is 0 °.

Example 3: on the basis of the embodiment 1, the fairways of the bell-shaped shell 1 on the longitudinal section along the center line of the crossed fairway are connected by a single circular arc and a tangent straight line.

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 kind of fixed end ball cage constant velocity universal joint, characterized by: mainly comprises a bell-shaped shell (1), a star-shaped sleeve (2), a retainer (3), a steel ball (4), an inner side (5), an opening side (6), a ball channel A (9) and a ball channel B (10), wherein a plurality of ball channels extending along the axial direction are formed on the inner spherical surface of the bell-shaped shell (1), the ball-and-socket joint is provided with an opening side (6) and an inner side (5) which are separated in the axial direction, a plurality of ball paths which are paired with ball paths of the outer race (2) are formed on the outer spherical surface of the outer race (2), a plurality of steel balls (4) are clamped between the ball paths of the outer race (1) and the inner race (2) and transmit torque, the steel balls (4) are held through a retainer (3), the retainer (3) is provided with an outer spherical surface and an inner spherical surface which are matched with the inner spherical surface of the outer race (1) and the outer spherical surface of the outer race (2), and the ball paths of the outer race (1) and the inner race (2) are divided into an A ball path (9) and a B ball path (10).

2. A fixed end birfield constant velocity joint as defined in claim 1 wherein: the ball path A (9) is of a non-crossed type, the ball paths of the outer shell (1) and the inner race (2) at the ball path A (9) are a single arc, the center of the ball path is coincident with the center O of the universal joint, the ball path of the outer shell (1) and the ball path of the inner race (2) are concentric, and the formed wedge angle is 0 degree.

3. A fixed end birfield constant velocity joint as defined in claim 1 wherein: the ball way B (10) is of a cross type, the plane of the ball way central line of the ball way of the outer ring-shaped shell (1) at the ball way B (10) is inclined relative to the axis N-N of the universal joint, the inclination directions of two adjacent inclined ball ways in the circumferential direction are opposite, the ball way of the inner ring-shaped sleeve (2) and the ball way of the outer ring-shaped shell (1) are in mirror symmetry in pairs relative to the plane B-B, and the inclination angle is theta.

4. A fixed end birfield constant velocity joint as defined in claim 1 wherein: the number of the steel balls (4) is 8.