CN217401469U - Wheel hub bearing with universal joint - Google Patents

Abstract

The utility model discloses a wheel hub bearing with a universal joint, which comprises an outer ring, an inner ring and a universal joint, rollers are matched between the outer ring and the inner ring, and the edges of the inner ring are arranged at positions corresponding to the rollers There is a retaining ring, the retaining ring is in contact with the roller, and the inner ring forms a limiting rib corresponding to the position of the retaining ring, one end of the limiting rib is in contact with the retaining ring, and the other end is in contact with the universal joint. The abutting surfaces of the limit rib and the universal joint are respectively arranged with straight teeth in the circumferential direction, and the universal joint and the limit rib are meshed with the straight teeth to form the inner ring and the universal joint. drive connection. It has compact structure, lower overall weight, high installation precision and stable power transmission.

Description

Wheel hub bearing with universal joint

technical field

The utility model relates to the technical field of wheel hub bearings, in particular to a wheel hub bearing with a universal joint.

Background technique

The hub bearing of the drive wheel is usually connected with the vehicle drive element (ball cage shaft) using a pair of inner and outer splines to transmit the vehicle power. The traditional connection method is provided with a long spline, which is difficult to process and difficult to assemble. Due to machining errors or wear during driving, there will be a gap between the drive element and the hub bearing during vehicle operation, so that the vehicle drive element and the hub are not coaxial with respect to the axis of rotation, and it is easy to produce abnormal starting noise, which makes the power transmission. Not smooth. At the same time, the national government's increasingly stringent requirements for vehicle emissions, as well as the application of new high-torque turbocharged engines and electric drive systems for new energy vehicles, more and more automakers are in urgent need of a compact, lower weight, installation accuracy High and stable power transmission wheel hub bearing.

Utility model content

In view of the deficiencies of the prior art, the utility model provides a wheel hub bearing with a universal joint, which is compact in structure, lower in overall weight, high in installation precision and stable in power transmission.

In order to achieve the above purpose, the present invention provides a wheel hub bearing with a universal joint, including an outer ring, an inner ring and a universal joint, rollers are fitted between the outer ring and the inner ring, and the edge of the inner ring is A retaining ring is provided corresponding to the position of the roller, and the retaining ring is in contact with the roller. The inner ring forms a limiting rib corresponding to the position of the retaining ring. The abutting surfaces of the limit rib and the universal joint are respectively arranged with straight teeth in the circumferential direction, and the universal joint and the limit rib are meshed with each other to form an inner ring. Drive connection with universal joint.

As a further arrangement of the present invention, a tooth slot is formed between adjacent straight teeth and a tooth slot is formed between the straight tooth, and the intersection point of the extension line of the tooth top of the straight tooth and the extension line of the tooth base of the tooth is deviated from the center line of rotation.

As a further arrangement of the present invention, an inclination angle α1 is formed between the straight tooth top extension line and the pitch plane, and an inclination angle α2 is formed between the tooth bottom extension line and the pitch plane, where α1≥α2, the The extension line of the tooth base of the tooth slot intersects with the pitch plane to form a first intersection point, the distance from the first intersection point to the rotation axis is S, the inner diameter of the straight tooth is d, and 0.05≤S/d≤0.5.

As a further arrangement of the present invention, the height of the spur-tooth top delay line relative to the rotation axis is gradually reduced from the radially outer side to the radially inner side, and the cogging slot bottom delay line is arranged from the radially outer side relative to the rotation axis. It is set to increase in height in the radially inner direction.

As a further arrangement of the present invention, the contour lines on both sides of the straight teeth are arranged to intersect with the center line of rotation.

In the above description, the center line of rotation refers to the central axis of the overall structure, and the pitch plane refers to the plane where the width of the tooth space is equal to the width of the tooth thickness under the same diameter of the truncated circle. The beneficial effect of this setting is: In the above structure, the universal joint and the inner ring are meshed with straight teeth to form the transmission of torque between the two. When the device is clamped, the straight teeth structure of the universal joint and the inner ring first contact each other at the large radial end, and follow As the clamping force increases and the small ends contact each other, in the clamped state, the individual spur teeth carry the load evenly over the entire length. When the hub bearing and the constant velocity joint begin to clamp, the inwardly open conical gap between the two end teeth can be closed by the deformation of the universal joint or the spur teeth of the hub bearing, which can lower the individual spur teeth load and reduce tooth surface stress. At the same time, the device's slight spring action in the axial direction contributes to the torsional resistance, resulting in a particularly high torsional and bending stiffness between the universal joint and the hub. The contour lines on both sides of the further straight teeth intersect with the center line of rotation, which can ensure the centering effect of the tooth meshing. The face angle β, preferably, the normal profile angle β is set to 36°~72°.

Description of drawings

Fig. 1 is the overall structure schematic diagram of the utility model embodiment;

2 is a schematic diagram of the first distribution mode of the intersection point of the extension line of the straight tooth tip and the pitch plane, and the extension line of the tooth bottom of the tooth slot and the node plane in the embodiment of the utility model;

3 is a schematic diagram of the second distribution mode of the intersection point of the extension line of the straight tooth tip and the pitch plane, and the extension line of the tooth bottom of the tooth slot and the node plane in the embodiment of the present utility model;

4 is a schematic diagram of the third distribution mode of the intersection of the extension line of the straight tooth tip and the pitch plane, and the extension line of the cogging bottom and the node plane in the embodiment of the present utility model;

5 is a cross-sectional view of the tooth pitch plane in the embodiment of the present utility model;

6 is a cross-sectional view of a tooth profile angle of an embodiment of the present utility model;

7 is a cross-sectional view of the normal profile of the tooth shape in the embodiment of the present invention.

Detailed ways

Embodiments of the wheel hub bearing with universal joints of the present invention are shown in Figures 1, 5, 6 and 7: comprising an outer ring 2, an inner ring 1 and a universal joint 3, the outer ring 2 and the inner ring 1 A roller 6 is fitted between them, and a retaining ring 5 is provided on the edge of the inner ring 1 corresponding to the position of the roller 6. The retaining ring 5 is in contact with the roller 6, and the inner ring 1 corresponds to the position of the retaining ring 5 to form a limited position The retaining edge 11, one end of the limiting retaining edge 11 is in contact with the retaining ring 5, and the other end is in contact with the universal joint 3, and the abutting surfaces of the limiting retaining edge 11 and the universal joint 3 are respectively along the circumference Straight teeth 7 are arranged in the direction, and the universal joint 3 and the limit rib 11 form a transmission connection between the inner ring 1 and the universal joint 3 through the mutual meshing of the straight teeth 7 .

As a further arrangement of the present embodiment, tooth slots 8 are formed between adjacent straight teeth 7 , and the intersection point of the extension line of the tooth top of the straight tooth 7 and the extension line of the tooth bottom of the tooth slot 8 is deviated from the center line of rotation.

As a further arrangement of this embodiment, an inclination angle α1 is formed between the extension line of the tooth top of the straight tooth 7 and the pitch plane, and an inclination angle α2 is formed between the extension line of the tooth base of the tooth slot 8 and the pitch plane, α1≥α2, The tooth base extension line of the tooth slot 8 intersects with the pitch plane to form a first intersection point, the distance from the first intersection point to the rotation axis is S, and the inner diameter of the straight tooth 7 is d, 0.05≤S/d≤0.5.

As a further configuration of the present embodiment, the height of the spur-tooth top delay line relative to the rotation axis is gradually reduced from the radially outer side to the radially inner side, and the cogging 8-slot bottom delay line is arranged from the radial direction relative to the rotation axis. The height is gradually increased from the outer side to the radially inner side.

As a further arrangement of this embodiment, the contour lines on both sides of the straight teeth 7 intersect with the center line of rotation.

The distribution of the intersection point of the extension line of the straight tooth top and the pitch plane, the extension line of the tooth base and the pitch plane of the spur tooth is shown in Figure 2 to Figure 4

As shown in Fig. 2, the intersection of the extension line of the straight tooth top and the pitch plane and the node of the extension line of the cogging bottom and the pitch plane are arranged on the same side of the rotation center line.

As shown in FIG. 3 , the intersection of the extension line of the spur tooth top and the pitch plane and the node of the extension line of the tooth base of the cogging tooth and the pitch plane are respectively arranged on both sides of the rotation center line.

As shown in Figure 4, the intersection of the extension line of the straight tooth top and the pitch plane and the extension line of the tooth base of the tooth cogging coincide with the node of the pitch plane.

The above examples are only one of the preferred specific examples of the present invention, and the usual changes and substitutions made by those skilled in the art within the scope of the technical solutions of the present invention are included in the protection scope of the present invention.

Claims (5)

1. A hub bearing with universal joint, characterized in that: including outer lane, inner circle and universal joint, the cooperation has the roller between outer lane and the inner circle, the inner circle border corresponds the roller position and is provided with the retaining ring, the retaining ring is contradicted on the roller, the inner circle corresponds the retaining ring position and is formed spacing flange, spacing flange one end is contradicted on the retaining ring, and the other end sets up with the universal joint butt, and the straight-tooth of having arranged along circumference respectively on spacing flange and the universal joint butt face between them, universal joint and spacing flange pass through the intermeshing of straight-tooth and form the inner circle and be connected with universal joint's transmission.

2. The universal-joint hub bearing according to claim 1, characterized in that: a tooth groove is formed between adjacent straight teeth, and the intersection point of the tooth top extension line and the tooth bottom extension line of the straight teeth is arranged to deviate from the rotation center line.

3. The universal-joint hub bearing according to claim 2, wherein: an inclination angle alpha 1 is formed between the tooth crest extension line of the straight teeth and the pitch plane, an inclination angle alpha 2 is formed between the tooth bottom extension line of the tooth socket and the pitch plane, alpha 1 is larger than or equal to alpha 2, the tooth bottom extension line of the tooth socket and the pitch plane are intersected to form a first intersection point, the distance from the first intersection point to the rotating shaft is S, the inner diameter of the straight teeth is d, and S/d is larger than or equal to 0.05 and smaller than or equal to 0.5.

4. The hub bearing with universal joint according to claim 2 or 3, wherein: the tooth crest delay line is arranged in a manner that the height is gradually reduced from the radial outer side to the radial inner side relative to the rotating shaft, and the tooth groove bottom delay line is arranged in a manner that the height is gradually increased from the radial outer side to the radial inner side relative to the rotating shaft.

5. The universal-joint hub bearing according to claim 1, wherein: the contour lines on the two sides of the straight tooth are intersected with each other on the rotation center line.

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