Wear-resistant injection molding split cylindrical roller retainer

Abstract

The utility model discloses a wear-resistant injection molding split cylindrical roller retainer, and belongs to the technical field of bearings. The device comprises a plurality of retainer units used for containing rollers, all the retainer units define an annular retainer set, the annular retainer set is located between a bearing inner ring and a bearing outer ring, and a gap is formed between every two adjacent retainer units; the retainer unit is used for semi-coating the roller, and a self-locking structure for positioning the roller is arranged on the retainer unit. In the mounting process of the retainer, the retainer is formed by split type splicing, so that the fracture risk of the retainer can be reduced in the operation process of the retainer; the split type self-locking roller bearing is transformed into a split type structure, the maintenance cost is reduced, the outer side of the roller is positioned through a self-locking structure, and the roller can be prevented from falling off from the outer side under the condition of radial or axial load stress. The weight-reducing oil storage grooves can enable the retainer units and the rollers to be fully lubricated, and heat generated by rolling friction is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of bearings, and particularly relates to a wear-resistant injection-molded split cylindrical roller cage. Background Art

[0002] A bearing cage refers to a bearing part located inside the bearing, wrapping all or part of the rolling elements and moving therewith, which is used to isolate the rolling elements, and usually also guides the rolling elements and holds them in the bearing.

[0003] The existing cylindrical roller cages have the following disadvantages:

[0004] 1. Different molds are required for traditional plastic cages of different diameters, resulting in high costs;

[0005] 2. There is a risk of fracture during the operation of the cage;

[0006] 3. The entire cage needs to be replaced after damage, resulting in high maintenance costs;

[0007] 4. Friction between the cage and the balls generates heat. Insufficient or untimely heat dissipation will increase the working temperature of the bearing, shorten the service life of the bearing, and reduce the reliability of the bearing. Summary of the Utility Model

[0008] The purpose of the utility model is to provide an efficient wear-resistant injection-molded split cylindrical roller cage.

[0009] To solve the above technical problems, the utility model provides a wear-resistant injection-molded split cylindrical roller cage, which includes a plurality of cage units for placing rollers. All the cage units enclose to form an annular cage group. The annular cage group is located between the inner ring and the outer ring of the bearing, and there is a gap between adjacent cage units; the cage units semi-wrap the rollers, and positioning protrusions for abutting against the rollers are arranged on the cage units.

[0010] Preferably, pocket holes are arranged on the cage units;

[0011] The rollers are placed in the pocket holes.

[0012] Preferably, positioning protrusions are arranged on the inner side wall of the pocket holes of the cage units.

[0013] Preferably, isolation protrusions are arranged on the outer side wall of the cage units;

[0014] The isolation protrusions between adjacent cage units abut against each other to form a gap.

[0015] Preferably, a self-locking structure for positioning the outside of the rollers is arranged on the cage units.

[0016] Preferably, the self-locking structure is formed by the cage unit extending towards the outside of the annular cage group around the pocket holes.

[0017] Preferably, both the top and bottom of the cage unit are hollowed out to form weight-reducing oil storage grooves.

[0018] Preferably, the rollers are cylindrical.

[0019] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0020] During the installation process of the cage of the present utility model, it is formed by split splicing, and the diameter of the cage formed by splicing can be freely adjusted by adjusting the number of cage units. During the operation of this cage, the risk of cage fracture can be reduced, and through the gaps generated by the connection of adjacent cage units, the stress points can be further dispersed, achieving an increase in the cage life and enabling the cage to be made larger. Moreover, the maintenance cost is reduced. From a simple integral cage structure, it is transformed into a split structure. If one cage unit is damaged and replaced with a new one, it can be used normally, reducing the product replacement cost.

[0021] The present utility model positions the outside of the rollers through the self-locking structure, and can prevent the rollers from falling off from the outside under radial or axial load conditions. The weight-reducing oil storage grooves can enable sufficient lubrication between the cage unit and the rollers, reducing the heat generated by rolling friction. In the present utility model, friction occurs between the balls and the positioning protrusions, reducing the contact area between the pocket holes and the rollers and reducing the wear between the two. Description of the Drawings

[0022] The following further details the specific embodiments of the present utility model in conjunction with the drawings.

[0023] Figure 1 is a schematic structural diagram of a wear-resistant injection-molded split cylindrical roller cage of the present utility model;

[0024] Figure 2 is a schematic structural diagram of the cage unit;

[0025] In the figure:

[0026] 1 - cage unit; 2 - pocket hole; 3 - self-locking structure; 4 - roller; 5 - positioning protrusion; 6 - isolation protrusion; 7 - gap; 8 - annular cage group; 9 - weight-reducing oil storage groove. Specific Embodiments

[0027] In the following description, numerous specific details are set forth to provide a thorough understanding of the present utility model. However, the present utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the connotation of the present utility model. Therefore, the present utility model is not limited by the specific implementations disclosed below.

[0028] The terms used in one or more embodiments of this specification are for the purpose of describing specific embodiments only and are not intended to limit one or more embodiments of this specification. The singular forms "a", "the", and "said" used in one or more embodiments of this specification and the appended claims are also intended to include the plural forms unless the context clearly dictates otherwise. It should also be understood that the term "and / or" used in one or more embodiments of this specification refers to and encompasses any and all possible combinations of one or more of the associated listed items.

[0029] It should be understood that although the terms first, second, etc. may be used in one or more embodiments of this specification to describe various information, such information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of one or more embodiments of this specification, the first may also be referred to as the second, and similarly, the second may also be referred to as the first. Depending on the context, the word "if" as used herein may be interpreted as "when" or "while" or "in response to determining".

[0030] The following further describes the present utility model in detail with reference to the accompanying drawings:

[0031] The present utility model provides a wear-resistant injection-molded split cylindrical roller cage, which includes a plurality of cage units 1 for placing rollers 4. All the cage units 1 enclose to form an annular cage group 8. The annular cage group 8 is located between the bearing inner ring and the bearing outer ring, and a gap 7 is provided between adjacent cage units 1; the cage unit 1 semi-covers the roller 4, and a positioning protrusion 5 for abutting against the roller 4 is provided on the cage unit 1.

[0032] Preferably, a pocket 2 is provided on the cage unit 1;

[0033] The roller 4 is placed in the pocket 2.

[0034] Preferably, a positioning protrusion 5 is provided on the inner side wall of the pocket 2 of the cage unit 1.

[0035] Preferably, a separation protrusion 6 is provided on the outer side wall of the cage unit 1;

[0036] The separation protrusions 6 between adjacent cage units 1 abut against each other to form a gap 7.

[0037] Preferably, a self-locking structure 3 for positioning the outer side of the roller 4 is provided on the cage unit 1.

[0038] Preferably, the self-locking structure 3 is formed by the cage unit 1 extending towards the outer side of the annular cage group 8 around the pocket 2.

[0039] Preferably, the top and bottom of the cage unit 1 are hollowed out to form weight-reducing and oil-storing grooves 9.

[0040] Preferably, the roller 4 is cylindrical.

[0041] To better illustrate the technical effects of the present invention, the present invention provides the following specific embodiments to illustrate the above technical processes:

[0042] Embodiment 1: A wear-resistant injection-molded split cylindrical roller cage, as Figures 1 - 2 shown, includes a plurality of cage units 1 in the shape of arc-shaped columns. All the cage units 1 enclose to form an annular cage group 8, and the annular cage group 8 is located between the bearing inner ring and the bearing outer ring. The cage is transformed from a simple complete integral cage structure into the split structure of this embodiment. During operation, this cage can reduce the risk of cage fracture; in addition, when one of the cage units 1 is damaged and a new cage unit 1 is replaced, it can be used normally, reducing the product replacement cost.

[0043] Pockets 2 are provided on the cage unit 1, and positioning protrusions 5 are provided on the inner side walls of the pockets 2. The roller 4 is positioned by the positioning protrusions 5, and the roller 4 is placed in the pocket 2 in a semi-covered manner. The semi-covered manner of the roller 4 reduces the contact area between the pocket 2 and the roller 4; when the high-speed ball bearing is operating, the ball 4 only generates friction with the positioning protrusion 5, reducing the contact area between the pocket 2 and the roller 4 and reducing the wear between the two.

[0044] The cage unit 1 extends towards the outer side of the annular cage group 8 around the pocket 2 to form an arc-shaped self-locking structure 3. By positioning the roller 4 through the self-locking structure 3, the roller 4 can be prevented from falling off under radial or axial load forces.

[0045] Isolation protrusions 6 are provided on the outer side wall of the cage unit 1, and the isolation protrusions 6 between adjacent cage units 1 abut against each other to form a gap 7. The gap 7 avoids interference caused by thermal expansion and contraction, and improves the load-bearing capacity by controlling the gap 7, and can bear larger radial and axial loads; the isolation protrusions 6 can also enhance the strength of the contact surface of the cage unit 1 and facilitate size adjustment.

[0046] Since the annular cage group 8 is formed by enclosing the cage units 1, and the adjacent cage units 1 are not fixedly connected, there will be a gap 7 between the adjacent cage units 1. The gap 7 can disperse the stress points during the operation of the cage, thereby enhancing the service life of the cage.

[0047] Both the top and bottom of the cage unit 1 are hollowed out to form a weight-reducing oil storage groove 9. Grease needs to be added to the weight-reducing oil storage groove 9. During the high-speed operation of the bearing, the cage is located between the inner ring and the outer ring of the bearing. Through sufficient lubrication between the cage unit 1 and the roller 4, the heat generated by rolling friction is reduced.

[0048] Any number of cage units 1 can be used as long as they can enclose to form the annular cage group 8. By adjusting the number of cage units, the diameter of the assembled cage can be freely adjusted. In this embodiment 1, as Figure 1 shown, 19 cage units 1 are used.

[0049] The mold opening cost of the cage in this embodiment is low. The mold does not use sliders and adopts a two-plate mold.

[0050] The above is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any change or replacement within the technical scope disclosed by the present invention should be covered by the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claimed rights.

Claims

1. A wear-resistant injection-molded split cylindrical roller cage, characterized in that, It includes a number of cage units (1) for placing rollers (4), and all the cage units (1) enclose to form an annular cage group (8). The annular cage group (8) is located between the inner ring and the outer ring of the bearing, and a gap (7) is provided between adjacent cage units (1); the cage unit (1) semi-covers the roller (4), and a positioning protrusion (5) that abuts against the roller (4) is provided on the cage unit (1).

2. The wear-resistant injection-molded split cylindrical roller cage according to claim 1, characterized in that: A pocket (2) is provided on the cage unit (1); The roller (4) is placed in the pocket (2).

3. The wear-resistant injection-molded split cylindrical roller cage according to claim 2, characterized in that: The cage unit (1) is provided with a positioning protrusion (5) on the inner side wall of the pocket (2).

4. The wear-resistant injection-molded split cylindrical roller cage according to claim 3, characterized in that: An isolation protrusion (6) is provided on the outer side wall of the cage unit (1); The isolation protrusions (6) between adjacent cage units (1) abut against each other to form a gap (7).

5. The wear-resistant injection-molded split cylindrical roller cage according to claim 1, characterized in that: A self-locking structure (3) for positioning the outer side of the roller (4) is provided on the cage unit (1).

6. The wear-resistant injection-molded split cylindrical roller cage according to claim 5, characterized in that: The self-locking structure (3) is formed by the cage unit (1) extending towards the outside of the annular cage group (8) around the pocket (2).

7. The wear-resistant injection-molded split cylindrical roller cage according to claim 1, characterized in that: Both the top and bottom of the cage unit (1) are hollowed out to form a weight-reducing and oil-storing groove (9).

8. The wear-resistant injection-molded split cylindrical roller cage according to claim 1, characterized in that: The roller (4) is cylindrical.

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