Injection molding split cylindrical roller retainer

Abstract

The invention discloses an 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, the fracture risk of the retainer can be reduced in the operation process of the retainer, stress points can be further dispersed through gaps generated by connection of the adjacent retainer units, and the service life of the retainer is prolonged. In addition, the maintenance cost is reduced, and a simple, complete and integrated retainer structure is transformed into a split type structure.

Description

Technical Field

[0001] The invention relates to the technical field of bearings, and in particular to an injection-molded split cylindrical roller cage. Background Art

[0002] A bearing cage is a bearing component that wraps all or part of the rolling elements inside the bearing and moves with them. It is used to isolate the rolling elements and usually guide the rolling elements and keep them in the bearing.

[0003] The existing cylindrical roller cage has the following disadvantages:

[0004] 1. Traditional plastic cages need different molds to be made into different diameters, which is very expensive.

[0005] 2. The cage is at risk of breaking during operation;

[0006] 3. The cage needs to be completely replaced after being damaged, and the maintenance cost is high;

[0007] 4. The friction between the cage and the ball generates heat. Insufficient or untimely heat dissipation will increase the operating temperature of the bearing, shorten the service life of the bearing, and reduce the reliability of the bearing. Summary of the invention

[0008] The purpose of the present invention is to provide an efficient injection-molded split cylindrical roller cage.

[0009] In order to solve the above technical problems, the present invention provides an injection molded split cylindrical roller cage, including a plurality of cage units for placing rollers, all of the cage units are enclosed to form an annular cage group, the annular cage group is located between the inner ring of the bearing and the outer ring of the bearing, and gaps are provided between adjacent cage units, and the cage units semi-cover the rollers.

[0010] Preferably, the retaining frame unit is provided with a pocket hole;

[0011] The rollers are placed in the pockets.

[0012] Preferably, the cage unit is provided with a positioning protrusion on the inner side wall of the pocket hole, which is in contact with the roller.

[0013] Preferably, an isolation protrusion is provided on the outer side wall of the retaining frame unit;

[0014] The isolation protrusions between adjacent retaining rack units abut against each other, thereby forming a gap.

[0015] Preferably, the retaining frame unit is provided with a self-locking structure for positioning the rollers.

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

[0017] Preferably, the self-locking structure is formed by the cage unit extending around the pocket toward the inner and outer sides of the annular cage group.

[0018] Preferably, the top and bottom of the retaining frame unit are hollowed out to form a weight-saving oil storage tank.

[0019] Preferably, the roller is cylindrical.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] In the process of cage installation, the present invention adopts split splicing, and the diameter of the cage formed by splicing can be freely adjusted by adjusting the number of cage units. This cage can reduce the risk of cage breakage during operation, and the gaps generated by connecting adjacent cage units can further disperse the stress points, thereby increasing the life of the cage and making the cage larger. It also reduces the maintenance cost, transforming from a simple complete integrated cage structure to a split structure. If one of the cage units is damaged, it can be replaced with a new one and can be used normally, reducing the cost of product replacement.

[0022] The present invention positions the inner and outer sides of the roller through a self-locking structure, which can prevent the roller from falling off from the outside under radial or axial load conditions. The weight-reducing oil storage tank can fully lubricate the cage unit and the roller, reducing the heat generated by rolling friction. The ball of the present invention generates friction with the positioning protrusion, which reduces the contact area between the pocket and the roller, reducing the wear between the two. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The specific implementation modes of the present invention are further described in detail below with reference to the accompanying drawings.

[0024] Figure 1 is a schematic structural diagram of an injection molded split cylindrical roller cage in Example 1;

[0025] Figure 2 is a schematic structural diagram of a cage unit in accordance with Embodiment 1;

[0026] Figure 3 is a schematic structural diagram of an injection molded split cylindrical roller cage in Example 2;

[0027] Figure 4 is a schematic structural diagram of a cage unit in Embodiment 2;

[0028] In the figure:

[0029] 1-cage unit; 2-pocket; 3-self-locking structure; 4-roller; 5-positioning protrusion; 6-isolation protrusion; 7-gap; 8-annular cage group; 9-weight-reducing oil storage tank. DETAILED DESCRIPTION

[0030] Many specific details are set forth in the following description to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways than those described herein, and those skilled in the art can make similar generalizations without violating the connotation of the present invention, so the present invention is not limited to the specific implementation disclosed below.

[0031] The terms used in one or more embodiments of this specification are only for the purpose of describing specific embodiments, and are not intended to limit one or more embodiments of this specification. The singular forms of "a", "said" and "the" used in one or more embodiments of this specification and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings. It should also be understood that the term "and / or" used in one or more embodiments of this specification refers to and includes any or all possible combinations of one or more associated listed items.

[0032] It should be understood that although the terms first, second, etc. may be used to describe various information in one or more embodiments of this specification, this 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 "at the time of" or "when" or "in response to determining".

[0033] The present invention is further described in detail below in conjunction with the accompanying drawings:

[0034] The present invention provides an injection molded split cylindrical roller cage.

[0035] The present invention provides an injection molded split cylindrical roller cage, comprising a plurality of cage units 1 for placing rollers 4, all of the cage units 1 enclosed to form an annular cage group 8, the annular cage group 8 is located between the inner ring of the bearing and the outer ring of the bearing, a gap 7 is provided between adjacent cage units 1, and the cage units 1 semi-cover the rollers 4.

[0036] Preferably, the retaining frame unit 1 is provided with a pocket 2;

[0037] The rollers 4 are placed in the pockets 2 .

[0038] Preferably, the cage unit 1 is provided with a positioning protrusion 5 on the inner side wall of the pocket 2 for abutting against the roller 4 .

[0039] Preferably, an isolation protrusion 6 is provided on the outer side wall of the retaining frame unit 1;

[0040] The isolation protrusions 6 between adjacent cage units 1 abut against each other, thereby forming a gap 7 .

[0041] Preferably, a self-locking structure 3 for positioning the roller 4 is provided on the retaining frame unit 1 .

[0042] Preferably, the self-locking structure 3 is formed by the cage unit 1 extending around the pocket 2 toward the outside of the annular cage group 8 .

[0043] Preferably, the self-locking structure 3 is formed by the cage unit 1 extending around the pocket 2 toward the inner and outer sides of the annular cage group 8 .

[0044] Preferably, the top and bottom of the retaining frame unit 1 are hollowed out to form a weight-reducing oil storage tank 9 .

[0045] Preferably, the roller 4 is cylindrical.

[0046] In order to better illustrate the technical effect of the present invention, the present invention provides the following specific embodiments to illustrate the above technical process:

[0047] Embodiment 1: An injection molded split cylindrical roller cage, such as Figures 1-2 As shown, it includes several cage units 1, all of which enclose an annular cage group 8, and the annular cage group 8 is located between the inner ring of the bearing and the outer ring of the bearing. The cage is transformed from a simple integrated cage structure to a split structure of the present embodiment, which can reduce the risk of cage breakage during operation; in addition, if one of the cage units 1 is damaged, it can be used normally after replacing a new cage unit 1, reducing the cost of product replacement.

[0048] The cage unit 1 is provided with a pocket 2, and the roller 4 is placed in the pocket 2 in a semi-enclosed manner, so that the contact area between the pocket 2 and the roller 4 is reduced, thereby reducing the wear between the two.

[0049] The cage unit 1 extends around the pocket 2 toward both the inner and outer sides of the annular cage group 8 to form an arc-shaped self-locking structure 3. The roller 4 is positioned by the self-locking structure 3 to prevent the roller 4 from falling off when subjected to radial or axial loads.

[0050] Since the annular retainer group 8 is formed by the retainer units 1, and adjacent retainer units 1 are not fixedly connected, there will be gaps 7 between adjacent retainer units 1. The gaps 7 can disperse the stress points during the operation of the retainer and enhance the life of the retainer.

[0051] The number of cage units 1 can be any, as long as they can enclose and form an annular cage group 8. By adjusting the number of cage units, the diameter of the cage formed by splicing can be freely adjusted. Figure 1 As shown, 19 cage units 1 are used.

[0052] The mold opening cost of the retaining frame in this embodiment is low, the mold does not need a slider, and a two-plate mold is used.

[0053] Embodiment 2: An injection molded split cylindrical roller cage, such as Figures 3-4 As shown, it includes several cage units 1, all of which are enclosed 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.

[0054] A pocket 2 is provided on the retaining frame unit 1, and a positioning protrusion 5 is provided on the inner wall of the pocket 2. The roller 4 is positioned by the positioning protrusion 5, and the roller 4 is placed in the pocket 2 in a semi-covered manner; when the high-speed ball bearing is running, the ball 4 will only produce friction with the positioning protrusion 5, so that the contact area between the pocket 2 and the roller 4 is reduced, thereby reducing the wear between the two.

[0055] The cage unit 1 extends around the pocket 2 toward the outside of the annular cage group 8 to form an arc-shaped self-locking structure 3. The roller 4 is positioned by the self-locking structure 3 to prevent the roller 4 from falling off under radial or axial load conditions.

[0056] An isolation protrusion 6 is provided on the outer wall of the retaining frame unit 1. The isolation protrusions 6 between adjacent retaining frame units 1 abut against each other to form a gap 7. The gap 7 avoids interference caused by thermal expansion and contraction. The load-bearing capacity is improved by controlling the gap 7, and it can withstand larger radial and axial loads. The isolation protrusion 6 can also enhance the strength of the contact surface of the retaining frame unit 1 and facilitate the adjustment of the size.

[0057] The top and bottom of the cage unit 1 are hollowed out to form a weight-reducing oil storage tank 9, and grease needs to be added to the weight-reducing oil storage tank 9. When the bearing is running at high speed, the cage is located between the inner ring and the outer ring of the bearing. The heat generated by rolling friction is reduced through sufficient lubrication between the cage unit 1 and the roller 4.

[0058] The number of cage units 1 can be any, as long as they can enclose and form an annular cage group 8. By adjusting the number of cage units, the diameter of the cage formed by splicing can be freely adjusted. Figure 3 As shown, 19 cage units 1 are used.

[0059] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. An injection molded split cylindrical roller cage, characterized in that: The invention comprises a plurality of cage units (1) for accommodating rollers (4), wherein all the cage units (1) are combined to form an annular cage group (8), wherein the annular cage group (8) is located between the inner ring and the outer ring of the bearing, and gaps (7) are provided between adjacent cage units (1), and the cage units (1) semi-cover the rollers (4).

2. The injection molded split cylindrical roller cage according to claim 1, characterized in that: The retaining frame unit (1) is provided with a pocket hole (2); The roller (4) is placed in the pocket (2).

3. The injection molded split cylindrical roller cage according to claim 2, characterized in that: The retaining frame unit (1) is provided with a positioning protrusion (5) on the inner side wall of the pocket hole (2) and abuts against the roller (4).

4. The 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 retaining frame unit (1); The isolation protrusions (6) between adjacent retaining frame units (1) abut against each other, thereby forming a gap (7).

5. The injection molded split cylindrical roller cage according to claim 1, characterized in that: The retaining frame unit (1) is provided with a self-locking structure (3) for positioning the roller (4).

6. The 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 around the pocket (2) toward the outside of the annular cage group (8).

7. The injection molded split cylindrical roller cage according to claim 5, characterized in that: The self-locking structure (3) is formed by the retaining frame unit (1) extending around the pocket hole (2) toward the inner and outer sides of the annular retaining frame group (8).

8. The injection molded split cylindrical roller cage according to claim 7, characterized in that: The top and bottom of the retaining frame unit (1) are both hollowed out to form a weight-reducing oil storage tank (9).

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

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