Hidden connecting bearing retainer and bearing

Abstract

The utility model discloses a hidden connecting bearing retainer and a bearing, and belongs to the technical field of bearing retainers. The retainer comprises a first framework unit, first pocket walls are evenly distributed in the circumferential direction of the first framework unit, the first framework unit is provided with an annular groove and a through hole, the through hole penetrates through the first pocket walls, and the through hole is located in the annular groove; the second skeleton unit is axially opposite to the first skeleton unit, second pocket walls are evenly distributed in the axial direction of the second skeleton unit, the first pocket walls and the second pocket walls are buckled to form pockets to contain rolling bodies, threaded holes are formed in the second pocket walls, and the threaded holes correspond to the through holes in position; the threaded fastener penetrates through the through hole to be in threaded connection with the threaded hole; the reinforcing ring is located in the annular groove and connected with the first framework unit. The technical problem that an existing split type bearing retainer is prone to fatigue damage is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of bearing retainers, in particular to a concealed connection bearing retainer and a bearing. Background Art

[0002] A bearing cage, also known as a retainer, is a bearing component that encloses the rolling elements and moves with them. Its primary function is to isolate the rolling elements, maintaining a suitable spacing between them to prevent them from contacting each other. It also ensures that the rolling elements are evenly dispersed, thus evenly distributing the load.

[0003] Depending on their structure, bearing cages can be divided into one-piece and split-piece types. Compared to one-piece bearing cages, split-piece bearing cages offer the advantages of easy disassembly and rapid maintenance, and therefore have broad application prospects. Split-piece bearing cages are typically composed of two skeletal units joined together to form a complete frame. During the splicing process, fasteners are inevitably required to connect the two frames. These fasteners typically protrude from the surface of the frame, affecting the forces applied during operation and making fatigue damage more likely. Therefore, a bearing cage with concealed fasteners is proposed. Utility Model Content

[0004] The main purpose of the utility model is to provide a concealed connection bearing retainer and a bearing, aiming to achieve a concealed connection of a split bearing retainer and reduce fatigue damage caused by uneven stress distribution.

[0005] To achieve the above-mentioned purpose, the present invention proposes a concealed connection bearing retainer, comprising:

[0006] The first skeleton unit has first pocket walls evenly distributed along its circumference, and the first skeleton unit is provided with an annular groove and a through hole, the through hole penetrating the first pocket wall, and the through hole is located in the annular groove;

[0007] a second skeleton unit, which is axially opposite to the first skeleton unit and has second pocket walls evenly distributed along the circumference of the second skeleton unit, the first pocket walls and the second pocket walls being engaged with each other to form pockets for accommodating rolling elements, the second pocket walls being provided with threaded holes corresponding to the positions of the through holes;

[0008] a threaded fastener, the threaded fastener passing through the through hole to be threadedly connected to the threaded hole;

[0009] A reinforcement ring is located in the annular groove and connected to the first skeleton unit.

[0010] Optionally, in an embodiment of the present invention, the second skeleton unit is further provided with at least one glue injection hole, and the glue injection hole is connected to the threaded hole.

[0011] Optionally, in an embodiment of the present invention, the axial length of the glue injection hole is equal to the axial length of the threaded hole.

[0012] Optionally, in an embodiment of the present invention, the threaded hole is a blind hole.

[0013] Optionally, in an embodiment of the present invention, the reinforcement ring is threadedly connected to the first skeleton unit, the first skeleton unit is provided with a connection hole, and the reinforcement ring is further provided with a receiving groove, and the bolt head is located in the receiving groove.

[0014] Optionally, in an embodiment of the present invention, the connecting hole is located between two of the first pocket holes walls.

[0015] Optionally, in an embodiment of the present invention, a lubrication groove is provided on the inner wall of the pocket along its circumference.

[0016] Optionally, in an embodiment of the present invention, a covering groove is further provided on a side of the reinforcement ring abutting against the annular groove, and the head of the threaded fastener is located in the covering groove.

[0017] Optionally, in one embodiment of the present invention, the pocket is a spherical pocket.

[0018] To achieve the above-mentioned purpose, the present invention further provides a bearing, comprising the concealed connection bearing retainer as described above.

[0019] Compared with the prior art, the present invention can at least achieve the following beneficial effects. The retainer proposed in this solution is a split bearing retainer, which is formed by the first skeleton unit and the second skeleton unit being fastened together to form the retainer frame body, and the first pocket hole wall and the second pocket hole wall are fastened together to form a pocket hole to limit the rolling body. When the two skeleton units are fastened together, the threaded fastener passes through the through hole and is connected with the threaded hole in the second skeleton unit. Since the annular groove is a concave structure, after the threaded fastener completes the splicing of the first skeleton unit and the second skeleton unit, the threaded fastener is located in the annular groove and does not protrude from the surface of the first skeleton unit. After tightening the threaded fastener, the reinforcement ring is connected to the first skeleton unit. The reinforcement ring can not only flatten the surface of the first skeleton unit to a certain extent, but also improve the structural strength of the first skeleton unit. By improving the structure of the first skeleton unit and improving the force structure of the retainer after the fastener is installed, the technical problem that the split retainer is prone to fatigue damage is solved. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0021] Figure 1 This is an exploded view of an embodiment of a concealed connection bearing retainer of the present invention;

[0022] Figure 2 This is a structural diagram of a concealed connection glue injection hole in a bearing retainer of the utility model;

[0023] Figure 3 This is a structural diagram of a threaded fastener in a concealed connection bearing retainer of the utility model;

[0024] Figure 4 The utility model is a structural schematic diagram of a hidden connection bearing retainer containing a groove and a covering groove.

[0025] Description of Figure Numbers:

[0026] 100, first skeleton unit; 110, first pocket wall; 120, annular groove; 130, through hole; 140, connecting hole; 200, second skeleton unit; 210, second pocket wall; 220, threaded hole; 230, threaded fastener; 240, glue injection hole; 300, reinforcement ring; 310, accommodating groove; 320, covering groove; 400, lubrication groove;

[0027] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0029] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0030] In this utility model, unless otherwise specified or limited, the terms "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can mean fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0031] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the meaning of "and / or" appearing throughout the text includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme in which A and B are satisfied at the same time. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0032] Reference Figures 1 to 4 The utility model proposes a hidden connection bearing retainer, comprising:

[0033] The first skeleton unit 100 has first pocket walls 110 evenly distributed along its circumference. The first skeleton unit 100 has an annular groove 120 and a through hole 130 formed therein. The through hole 130 penetrates the first pocket wall 110 and is located within the annular groove 120 .

[0034] The second skeleton unit 200 is axially opposed to the first skeleton unit 100. Second pocket walls 210 are evenly distributed along the circumference of the second skeleton unit 200. The first pocket walls 110 and the second pocket walls 210 engage to form pockets for accommodating rolling elements. The second pocket walls 210 are provided with threaded holes 220 corresponding to the positions of the through holes 130.

[0035] a threaded fastener 230 , the threaded fastener 230 passing through the through hole 130 to be threadedly connected to the threaded hole 220 ;

[0036] The reinforcement ring 300 is located in the annular groove 120 and is connected to the first skeleton unit 100 .

[0037] The retainer proposed in this solution is a split-type bearing retainer. It is composed of a first skeleton unit 100 and a second skeleton unit 200 that are fastened together to form the retainer body. The first pocket wall 110 and the second pocket wall 210 are fastened together to form pockets that retain the rolling elements. After the two skeleton units are fastened together, a threaded fastener 230 passes through the through-hole 130 and connects with the threaded hole 220 in the second skeleton unit 200. Because the annular groove 120 is a concave structure, after the threaded fastener 230 completes the splicing of the first and second skeleton units 100, it lies within the annular groove 120 and does not protrude from the surface of the first skeleton unit 100. After tightening the threaded fastener 230, a reinforcement ring 300 is connected to the first skeleton unit 100. The reinforcement ring 300 not only smoothes the surface of the first skeleton unit 100 to a certain extent but also enhances its structural strength. By improving the structure of the first skeleton unit 100, the stress structure of the retainer after the fasteners are installed is improved so that the stress is evenly distributed everywhere, thereby solving the technical problem that the split retainer is prone to fatigue damage.

[0038] As rolling elements rotate within pockets, a certain degree of friction inevitably occurs between them. This friction not only causes wear on the pockets and rolling elements, but also generates vibration and noise, affecting the stability of bearing operation. To mitigate this friction, lubricating oil is typically added to reduce friction. To enhance the lubricating effect of the lubricating oil on the rolling elements, lubrication grooves 400 are provided along the inner wall of the pockets along their circumference. These grooves can store a certain amount of lubricating oil, which lubricates the rolling elements during operation, reducing friction and vibration.

[0039] Furthermore, the second skeleton unit 200 is also provided with a glue injection hole 240, and the glue injection hole 240 is connected to the threaded hole 220. Compared with the integrated bearing retainer, although the split retainer has the characteristic of being detachable, it also leads to the possibility of loose connection between the two skeleton units. This problem is solved by providing the glue injection hole 240. During the connection process, thread glue is added to the threaded hole 220 through the glue injection hole 240. As the threaded fastener 230 is screwed in, the thread glue is gradually distributed throughout the threaded hole 220, thereby improving the connection stability between the threaded fastener 230 and the second skeleton unit 200. In addition, the glue injection hole 240 is connected to the threaded hole 220, and the glue injection operation can be gradually performed into the threaded hole 220 during the process of screwing the threaded fastener 230. If the thread glue is injected in excess, the glue injection hole 240 can accommodate the excess thread glue to prevent the thread glue from overflowing the threaded hole 220. It can be understood that after the thread glue is injected, the two skeleton units can still be completely disassembled. After the glue injection hole 240 is created, glue can be injected directly into the threaded hole 220, so the threaded fastener 230 can be a semi-threaded bolt. Furthermore, to facilitate glue injection or to allow glue to be injected at various axial locations of the threaded hole 220, the axial length of the glue injection hole 240 is set to be equal to the axial length of the threaded hole 220. To prevent the thread glue from flowing out of the threaded hole 220, the threaded hole 220 is a blind hole.

[0040] To facilitate the flow of thread glue from the injection hole 240 into the threaded hole 220, the injection hole 240 can be inclined, and the inner wall of the injection hole 240 guides the flow of the thread glue. Optionally, the angle between the axis of the injection hole 240 and the threaded hole 220 can be [10° to 45°], preferably 30°. The injection hole 240 with a 30° inclination angle can both accelerate the flow of thread glue and avoid the injection hole 240 occupying a large area on the second pocket hole wall 210.

[0041] It is understandable that a plurality of glue injection holes 240 may be provided, which are respectively connected to the threaded hole 220 along the circumference of the threaded hole 220 to enable glue injection operations on the threaded hole 220 at different positions.

[0042] In one embodiment, the reinforcement ring 300 is provided with a receiving groove 310, and the reinforcement ring 300 is threadedly connected to the first frame unit 100. Furthermore, the first frame unit 100 is provided with a connecting hole 140 that forms a threaded fit with the reinforcement ring 300. When the reinforcement ring 300 and the first frame unit 100 are threadedly connected using bolts, the heads of the bolts inevitably protrude from the reinforcement ring 300, and therefore from the first frame unit 100. To prevent the bolt heads from affecting the smoothness of the surface of the first frame unit 100, receiving grooves 310 are provided to accommodate the bolt heads.

[0043] The reinforcement ring 300 is directly fastened in the annular groove 120, covering the top of the threaded fastener 230. In order to improve the connection stability between the reinforcement ring 300 and the first skeleton unit 100, the reinforcement ring 300 is also provided with a covering groove 320. After the reinforcement ring 300 is fastened in the annular groove 120, the covering groove 320 wraps the head of the threaded fastener 230 and forms a tighter connection with the annular groove 120.

[0044] In one embodiment, the pocket is spherical in shape to accommodate a spherical rolling element.

[0045] The present invention also proposes a bearing, which includes a retaining frame as described above. Specifically, the specific structure of the retaining frame refers to the above embodiment. Since the bearing adopts all the technical solutions of the above embodiment, it has at least all the beneficial effects brought by the technical solutions of the above embodiment, which will not be described one by one here.

[0046] The above are merely optional embodiments of the present invention and do not limit the patent scope of the present invention. All equivalent structural transformations made based on the contents of the present invention specification and drawings, or direct / indirect applications in other related technical fields, within the inventive concept of the present invention, are included in the patent protection scope of the present invention.

Claims

1. A hidden connection bearing retainer, characterized in that: include: The first skeleton unit has first pocket walls evenly distributed along its circumference, and the first skeleton unit is provided with an annular groove and a through hole, the through hole penetrating the first pocket wall, and the through hole is located in the annular groove; a second skeleton unit, which is axially opposite to the first skeleton unit and has second pocket walls evenly distributed along the circumference of the second skeleton unit, the first pocket walls and the second pocket walls being engaged with each other to form pockets for accommodating rolling elements, the second pocket walls being provided with threaded holes corresponding to the positions of the through holes; a threaded fastener, the threaded fastener passing through the through hole to be threadedly connected to the threaded hole; A reinforcement ring is located in the annular groove and connected to the first skeleton unit.

2. The concealed connection bearing retainer according to claim 1, characterized in that: The second skeleton unit is further provided with at least one glue injection hole, and the glue injection hole is connected to the threaded hole.

3. The concealed connection bearing retainer according to claim 2, characterized in that: The axial length of the glue injection hole is equal to the axial length of the threaded hole.

4. The concealed connection bearing retainer according to claim 2, characterized in that: The threaded hole is a blind hole.

5. The concealed connection bearing retainer according to claim 2, characterized in that: The reinforcement ring is threadedly connected to the first skeleton unit. The first skeleton unit is provided with a connection hole. The reinforcement ring is also provided with a receiving groove. The bolt head is located in the receiving groove.

6. The concealed connection bearing retainer according to claim 5, characterized in that: The connecting hole is located between the two first pocket hole walls.

7. The concealed connection bearing retainer according to claim 1, characterized in that: The inner wall of the pocket hole is provided with a lubrication groove along its circumference.

8. The concealed connection bearing retainer according to claim 1, characterized in that: A covering groove is further provided on one side of the reinforcement ring abutting against the annular groove, and the head of the threaded fastener is located in the covering groove.

9. The concealed connection bearing retainer according to claim 1, characterized in that: The pocket is a spherical pocket.

10. A bearing, characterized in that: The invention comprises a concealed connection bearing retainer according to any one of claims 1 to 9.

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