Special-shaped drawn cup needle bearing

Abstract

The utility model discloses a special-shaped drawn cup needle roller bearing, which comprises an outer ring and a retainer, a plurality of pockets are arranged on the retainer, needle rollers are matched in the pockets, a plurality of contact bulges are formed on the outer ring, the adjacent contact bulges are connected through first smooth curved surfaces, and the first smooth curved surfaces are connected with the needle rollers through second smooth curved surfaces. The retainer is provided with contact protrusions, abutting protrusions corresponding to the contact protrusions in number are formed on the retainer, the adjacent abutting protrusions are connected through second smooth curved surfaces, the first smooth curved surfaces correspond to the second smooth curved surfaces in an arc shape, and the retainer is arranged in a fracture mode. The self-aligning device is simple in layout, good in self-aligning effect, more stable and reliable in overall structure and good in using effect.

Description

Technical Field

[0001] The utility model relates to a special-shaped stamped outer ring needle roller bearing. Background Art

[0002] At present, most of the needle roller bearings on the market have clearance fit with the shaft after being pressed into the seat hole. In the steering of the car, there is a problem of excessive friction torque between the negative clearance needle roller bearing and the shaft, which makes the existing needle roller bearing structure unable to meet some special occasions that require negative clearance fit and low friction torque. At the same time, the existing structure is prone to swing and abnormal noise during use, which is not conducive to the stability of the structure and reduces the service life of the structure. Utility Model Content

[0003] In view of the deficiencies in the prior art, the utility model provides a special-shaped stamped outer ring needle roller bearing, which has a simple layout and good self-aligning effect, while the overall structure is more stable and reliable, and has a good use effect.

[0004] To achieve the above-mentioned purpose, the utility model provides a special-shaped stamped outer ring needle roller bearing, including an outer ring and a retaining frame, the retaining frame is provided with a plurality of pockets, the pockets are fitted with needle rollers, the outer ring is formed with a plurality of contact protrusions, the adjacent contact protrusions are connected by a first smooth curved surface, the retaining frame is formed with a number of interference protrusions corresponding to the contact protrusions, the adjacent interference protrusions are connected by a second smooth curved surface, the first smooth curved surface corresponds to the second smooth curved surface in arc shape, and the retaining frame is provided with a fracture.

[0005] The beneficial effect of such arrangement is as follows: by such arrangement, the outer ring is arranged as an anisotropic structure, that is, a plurality of contact protrusions are formed on the outer ring, and adjacent contact protrusions are connected by a first smooth curved surface, so that the overall structure is close to a circle in appearance, but is not circular, and after the bearing is pressed into the seat hole and passed into the shaft, the contact protrusions can ensure that the bearing, the seat hole and the shaft are all in an interference fit, that is, a negative clearance state, thereby ensuring that the bearing has a certain pre-tightening, preventing the shaft from swinging and making abnormal noises during operation, and further ensuring that the retainer has good flexibility through the fracture on the retainer, thereby ensuring that the bearing and the shaft are in three-line contact, reducing the operating friction torque, and ensuring the operating speed of the bearing. This structure is simple, convenient to process, and has a good use effect.

[0006] As a further configuration of the utility model, the upper edge of the outer ring is bent to form a first rib, the lower edge of the outer ring is bent to form a second rib, and the retaining frame is arranged between the first rib and the second rib.

[0007] The beneficial effect of such arrangement is that such arrangement further ensures the stability of the structure, and at the same time the structure is simple, easy to implement, and has a good use effect.

[0008] As a further configuration of the present invention, a transition groove is provided between the second rib and the outer ring.

[0009] The beneficial effect of such arrangement is that it makes the structure more stable, facilitates lubrication, and effectively improves the reliability of the overall structure.

[0010] As a further configuration of the utility model, a chamfer is formed on the retaining frame at a position corresponding to the fracture.

[0011] The beneficial effect of such arrangement is that such arrangement avoids the port positions from being staggered and conflicting with the outer ring, causing structural instability and avoiding abnormal noise, and the structure is simple, easy to implement and has good use effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 The structure of the embodiment of the utility model is shown in FIG.

[0013] Figure 2 It is a top view of an embodiment of the utility model (the dotted line in the figure is a standard circle);

[0014] Figure 3 It is a schematic cross-sectional structure diagram of an embodiment of the utility model. DETAILED DESCRIPTION

[0015] The implementation of the utility model special-shaped stamped outer ring needle roller bearing is as follows: Figures 1 to 3 As shown: it includes an outer ring 1 and a retaining frame 2, the retaining frame 2 is provided with a plurality of pockets, the pockets are fitted with needle rollers 21, the outer ring 1 is formed with a plurality of contact protrusions, the adjacent contact protrusions are connected by a first smooth curved surface, the retaining frame 2 is formed with a number of abutment protrusions corresponding to the contact protrusions, the adjacent abutment protrusions are connected by a second smooth curved surface, the first smooth curved surface corresponds to the second smooth curved surface in arc shape, and the retaining frame 2 is provided with a fracture. The beneficial effect of such arrangement is as follows: in such arrangement, by arranging the outer ring 1 as an anisotropic structure, that is, a plurality of contact protrusions are formed on the outer ring 1, and adjacent contact protrusions are connected by a first smooth curved surface, so that the overall structure is close to a circle in appearance, but is not circular, and by pressing the bearing into the seat hole and passing the shaft, the contact protrusions can ensure that the bearing and the seat hole and the shaft are all in an interference fit, that is, a negative clearance state, thereby ensuring that the bearing has a certain pre-tightening, preventing the shaft from swinging and making abnormal noises during operation, and further ensuring that the retainer has good flexibility through the fracture on the retainer 2, thereby ensuring that the bearing and the shaft are in three-line contact, reducing the operating friction torque, and ensuring the operating speed of the bearing. This structure is simple, easy to process, and has a good use effect.

[0016] As a further configuration of this embodiment, the upper edge of the outer ring 1 is bent to form a first rib 11, the lower edge of the outer ring 1 is bent to form a second rib 12, and the retaining frame 2 is arranged between the first rib 11 and the second rib 12. The beneficial effect of this configuration is that the stability of the structure is further ensured, and the structure is simple, easy to implement, and has a good use effect.

[0017] As a further configuration of this embodiment, a transition groove 13 is provided between the second rib 12 and the outer ring 1. The beneficial effect of this configuration is that it is more stable, easy to lubricate, and effectively improves the reliability of the overall structure.

[0018] As a further configuration of this embodiment, a chamfer 22 is formed on the retaining frame 2 at the corresponding fracture position. The beneficial effect of this configuration is that it avoids the port positions from being staggered and conflicting with the outer ring 1, causing structural instability and avoiding abnormal noise, and this structure is simple, easy to implement, and has a good use effect.

[0019] The above example is only one preferred specific example of the present invention. The common changes and substitutions made by those skilled in the art within the technical solution of the present invention are all included in the protection scope of the present invention.

Claims

1. A special-shaped stamped outer ring needle roller bearing, comprising an outer ring and a cage, wherein the cage is provided with a plurality of pockets, wherein the pockets are fitted with needle rollers, and wherein: A plurality of contact protrusions are formed on the outer ring, and adjacent contact protrusions are connected by a first smooth curved surface. A number of interference protrusions corresponding to the contact protrusions are formed on the retaining frame, and adjacent interference protrusions are connected by a second smooth curved surface. The first smooth curved surface corresponds to the arc of the second smooth curved surface, and the retaining frame is provided with a fracture.

2. The special-shaped drawn cup needle roller bearing according to claim 1, characterized in that: The upper edge of the outer ring is bent to form a first rib, the lower edge of the outer ring is bent to form a second rib, and the retaining frame is arranged between the first rib and the second rib.

3. The special-shaped drawn cup needle roller bearing according to claim 2, characterized in that: A transition groove is arranged between the second rib and the outer ring.

4. The special-shaped drawn cup needle roller bearing according to claim 1, 2 or 3, characterized in that: A chamfer is formed on the retaining frame at a position corresponding to the fracture.

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