Semicircular drawn cup needle bearing

Abstract

The utility model belongs to the technical field of bearings, and particularly relates to a semicircular drawn cup needle roller bearing which comprises an outer ring and a retainer located on the inner side of the outer ring, a plurality of windows distributed at intervals are formed in the retainer in the circumferential direction of the retainer, and a needle roller is arranged in each window. The two sides, in the axial direction, of the outer ring are bent to form turned edges used for axially limiting the retainer, the two sides, in the axial direction, of the retainer are provided with abutting parts in a protruding mode, the abutting parts are used for being in interference fit with the turned edges, and the abutting parts are elastically arranged. According to the utility model, the abutting part on the retainer is in interference fit with the curled edge on the outer ring, so that the roller pin and the retainer are prevented from falling off in the vertical assembly process of the bearing, and meanwhile, the elastically arranged abutting part is used for controlling the abutting force to prevent the retainer and the roller pin from moving and being blocked in the use process of the bearing, so that the assembly and use requirements are met.

Description

Technical Field

[0001] The utility model belongs to the technical field of bearings, and in particular relates to a semicircular stamped outer ring needle roller bearing. Background Art

[0002] Semicircular stamped outer ring needle roller bearings are non-full circle structures, which can be semicircular or quarter arcs. They are usually used in automobile brake systems. They include outer rings, rollers and cages for mounting rollers. At present, semicircular stamped outer ring needle roller bearings are assembled vertically. The cages and needle rollers rely on the adhesion of grease to stick together, but the reliability is low. The cages and needle rollers are easy to fall off the outer ring due to their own gravity, which affects the assembly progress. Utility Model Content

[0003] The technical problem to be solved by the utility model is: in order to solve the problem that in the prior art, semicircular stamped outer ring needle roller bearings are all assembled vertically, the retaining frame and the needle rollers are adhered by the adhesive force of grease, but the reliability is low, and the retaining frame and the needle rollers are easy to fall from the outer ring due to their own gravity factors, thus affecting the assembly progress, a semicircular stamped outer ring needle roller bearing is provided.

[0004] In order to solve the above technical problems, the utility model adopts the following technical solutions: a semicircular stamped outer ring needle roller bearing, comprising an outer ring and a retaining frame located on the inner side of the outer ring, the retaining frame is provided with a plurality of spaced windows along its circumferential direction, a needle roller is provided inside each window, the outer ring is bent along both sides of its axial direction to form curled edges for axially limiting the retaining frame, the retaining frame is provided with abutting portions for interference fit with the curled edges along both sides of its axial direction, the abutting portions are elastically arranged, and the abutting portions can overcome the gravity factor during the vertical assembly of the bearing by abutting with the outer ring to prevent the needle roller and the retaining frame from falling off, and the elastic arrangement of the abutting portions can ensure that the abutting force is not too large, and it is necessary to prevent the retaining frame and the needle roller from getting stuck during the use of the bearing.

[0005] The above technical solution utilizes the interference fit between the abutment on the retaining frame and the rolled edge on the outer ring to prevent the needle roller and retaining frame from falling off during the vertical assembly of the bearing, and at the same time utilizes the elastically arranged abutment to control the abutment force to prevent the retaining frame and needle roller from getting stuck during the use of the bearing, thereby meeting the assembly and use requirements.

[0006] Furthermore, the retaining frame is provided with elastic deformation grooves on both sides along its axial direction, and the elastic deformation groove on each side corresponds to the abutment portion on its side to achieve elastic setting of the abutment portion, thereby preventing the abutment force generated by the abutment portion from being too large, causing the retaining frame and the needle roller to get stuck.

[0007] Furthermore, the inner wall of the curling edge extends axially to form a limiting portion for radially limiting the retaining frame to prevent the retaining frame from radially sliding out of the outer ring, and the thickness of the limiting portion gradually decreases from the curling edge toward the retaining frame, that is, the limiting surface of the limiting portion is inclined.

[0008] Furthermore, the retaining frame includes a central portion with a window and edge portions located on both sides of the central portion, the elastic deformation groove and the abutment portion are both located on the edge portions, the thickness of the central portion is greater than the thickness of the edge portion, the edge portion with a small thickness is more conducive to realizing the elastic setting of the abutment portion and a sufficient gap is left between the edge portion with a small thickness and the limiting portion to avoid interference with the movement of the retaining frame.

[0009] Furthermore, the abutment portion is columnar, and there are several abutment portions on each side, and the several abutment portions on each side correspond to the elastic deformation groove on the side where they are located. The elastic deformation groove on each side can be set to one, and at this time, the several abutment portions are located within the travel range of the elastic deformation groove. The elastic deformation groove on each side can also be set to several, and at this time, the several abutment portions correspond one-to-one to the several elastic deformation grooves.

[0010] Furthermore, one end of the outer ring is bent inward along its circumferential direction to form a rib for limiting the circumferential position of the retaining frame. The rib is located at one end of the outer ring to prevent the retaining frame from sliding out of the outer ring from this end, while the other end is not provided with a rib. When in use, the retaining frame and the needle roller need to be moved out by a needle position to meet the requirement of a large stroke.

[0011] Furthermore, one end of the outer ring along its circumference is bent outward to form a mounting portion for cooperating with an external mounting seat, and the retaining edge and the mounting portion are located at the same end, and the bearing is fixed by the mounting portion during assembly or use.

[0012] Furthermore, the thickness of the curling edge is smaller than the thickness of the outer ring so that an avoidance groove is formed in the bending portion to prevent the bending portion from protruding when the curling edge is bent and affecting the movement of the retaining frame.

[0013] The beneficial effects of the utility model are as follows: the utility model utilizes the interference fit between the abutment portion on the retaining frame and the curled edge on the outer ring to prevent the needle roller and the retaining frame from falling off during the vertical assembly of the bearing, and at the same time utilizes the elastically arranged abutment portion to control the abutment force to prevent the retaining frame and the needle roller from getting stuck during the use of the bearing, thereby meeting the assembly and use requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0015] Figure 1 It is a three-dimensional schematic diagram of the utility model;

[0016] Figure 2 It is a side view (vertical state view) of the utility model;

[0017] Figure 3 It is the front view of the utility model;

[0018] Figure 4 yes Figure 3 Sectional view in the AA direction;

[0019] Figure 5 yes Figure 4 A partial enlarged view of part B;

[0020] Figure 6 It is a three-dimensional schematic diagram of the outer ring;

[0021] Figure 7 is a three-dimensional schematic diagram of the cage;

[0022] In the figure:

[0023] 1. outer ring; 101. curling edge; 1011. limiting part; 102. retaining edge; 103. mounting part; 104. avoidance groove;

[0024] 2. retaining frame; 201. window; 202. abutting portion; 203. elastic deformation groove; 204. center portion; 205. edge portion;

[0025] 3. Rolling needle. DETAILED DESCRIPTION

[0026] Now the utility model is further described in detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the utility model in a schematic manner, and therefore only show the components related to the utility model.

[0027] Embodiment 1:

[0028] like Figure 1-Figure 7 As shown, the utility model is a semicircular stamped outer ring needle roller bearing, which is in the shape of a quarter arc, and comprises an outer ring 1 and a retainer 2 located inside the outer ring 1, and the retainer 2 is made of plastic;

[0029] The outer ring 1 is bent along both sides of its axial direction to form a rolled edge 101 for axially limiting the retaining frame 2. The thickness of the rolled edge 101 is less than that of the outer ring 1, so that a avoidance groove 104 is formed in the bent portion to prevent the bent portion from protruding and affecting the movement of the retaining frame 2 when the rolled edge 101 is bent; one end of the outer ring 1 is bent inward along its circumferential direction to form a retaining edge 102 for circumferentially limiting the retaining frame 2, and the end is bent outward to form a mounting portion 103 for cooperating with an external mounting seat, the retaining edge 102 and the mounting portion 103 are located at the same end, and the mounting portion 103 is located in the middle, and the two retaining edges 102 are located on both sides of the mounting portion 103; when the bearing is assembled or used, the mounting portion 103 and the retaining edge 102 are both located at the upper end, such as Figure 2 As shown, after the bearing is fixed by the mounting portion 103, the rib 102 at the upper end is used to prevent the retaining frame 2 from sliding out of the outer ring 1 from this end, while the rib 102 is not provided at the lower end. When in use, the retaining frame 2 and the needle roller 3 need to extend one needle position from the lower end to meet the requirement of a large stroke.

[0030] The inner wall of the curling edge 101 extends axially to form a limiting portion 1011 for radially limiting the retaining frame 2 to prevent the retaining frame 2 from radially sliding out of the outer ring 1, and the thickness of the limiting portion 1011 gradually decreases from the curling edge 101 toward the retaining frame 2, that is, the limiting surface of the limiting portion 1011 is inclined.

[0031] The retaining frame 2 is provided with a plurality of windows 201 distributed at intervals along its circumferential direction, and a needle roller 3 is provided inside each window 201. The retaining frame 2 is provided with abutment portions 202 for interference fit with the crimping edge 101 on both sides along its axial direction. The abutment portions 202 are elastically arranged, and can overcome the gravity factor to prevent the needle roller 3 and the retaining frame 2 from falling off during the vertical assembly of the bearing by abutting against the outer ring 1. The elastic arrangement of the abutment portions 202 ensures that the abutment force is not too large, so as to prevent the retaining frame 2 and the needle roller 3 from getting stuck during the use of the bearing.

[0032] The retainer 2 is provided with elastic deformation grooves 203 on both sides along the axial direction, and the elastic deformation grooves 203 on each side correspond to the abutment 202 on the side thereof to realize the elastic setting of the abutment 202, thereby preventing the abutment force generated by the abutment 202 from being too large, which may cause the retainer 2 and the needle roller 3 to be stuck. The abutment 202 is columnar, and there are a plurality of abutment 202 on each side, and the plurality of abutment 202 on each side correspond to the elastic deformation grooves 203 on the side thereof. The elastic deformation grooves 203 on each side may be set to one, and in this case, the plurality of abutment 202 are located within the travel range of the elastic deformation grooves 203. The elastic deformation grooves 203 on each side may also be set to a plurality, and in this case, the plurality of abutment 202 corresponds to the plurality of elastic deformation grooves 203 one by one.

[0033] The retaining frame 2 includes a central portion 204 with a window 201 and edge portions 205 located on both sides of the central portion 204. The elastic deformation groove 203 and the abutment portion 202 are both located on the edge portion 205. The thickness of the central portion 204 is greater than the thickness of the edge portion 205. The small thickness of the edge portion 205 is more conducive to realizing the elastic setting of the abutment portion 202 and a sufficient gap is left between the small thickness of the edge portion 205 and the limiting portion 1011 to avoid interference with the movement of the retaining frame 2.

[0034] Based on the above ideal embodiments of the utility model, the relevant staff can make various changes and modifications without deviating from the technical concept of the utility model through the above description. The technical scope of the utility model is not limited to the content of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A semicircular stamped outer ring needle roller bearing, characterized in that: The invention comprises an outer ring (1) and a retaining frame (2) located inside the outer ring (1); the retaining frame (2) is provided with a plurality of windows (201) distributed at intervals along its circumferential direction; a roller needle (3) is provided inside each window (201); both sides of the outer ring (1) are bent along its axial direction to form curling edges (101) for axially limiting the retaining frame (2); both sides of the retaining frame (2) are protruding along its axial direction to form abutment portions (202) for interference fit with the curling edges (101); the abutment portions (202) are elastically arranged.

2. The semicircular drawn outer ring needle roller bearing according to claim 1, characterized in that: The retaining frame (2) is provided with elastic deformation grooves (203) on both sides along the axial direction thereof, and the elastic deformation groove (203) on each side corresponds to the abutment portion (202) on the side where it is located.

3. The semicircular drawn outer ring needle roller bearing according to claim 1, characterized in that: The inner wall of the curling edge (101) extends axially to form a limiting portion (1011) for radially limiting the retaining frame (2).

4. The semicircular drawn outer ring needle roller bearing according to claim 2, characterized in that: The retaining frame (2) comprises a central portion (204) having a window (201) and edge portions (205) located on both sides of the central portion (204); the elastic deformation groove (203) and the abutment portion (202) are both located on the edge portion (205); and the thickness of the central portion (204) is greater than the thickness of the edge portion (205).

5. The semicircular drawn outer ring needle roller bearing according to claim 1, characterized in that: The abutting portion (202) is columnar, and there are a plurality of abutting portions (202) on each side.

6. The semicircular drawn cup needle roller bearing according to claim 1, characterized in that: The outer ring (1) is bent inwardly along one end of its circumferential direction to form a retaining edge (102) for circumferentially limiting the retaining frame (2).

7. The semicircular drawn cup needle roller bearing according to claim 6, characterized in that: The outer ring (1) is bent outward along one end of its circumference to form a mounting portion (103) for cooperating with an external mounting seat, and the retaining edge (102) and the mounting portion (103) are located at the same end.

8. The semicircular drawn cup needle roller bearing according to claim 1, characterized in that: The thickness of the curling edge (101) is less than the thickness of the outer ring (1) so that an avoidance groove (104) is formed in a recessed manner at the bending position.

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