Double-row roller bearing retainer and bearing

Abstract

The invention discloses a double-row roller bearing retainer and a bearing, and belongs to the technical field of bearing retainers. The retainer comprises two end rings and a plurality of retainer rings, wherein the two end rings are oppositely and concentrically arranged; the window beams are connected with the two end rings, the multiple window beams are evenly arranged in the circumferential direction of the end rings at intervals, a containing cavity is formed between every two adjacent window beams, and two rolling bodies are contained in each containing cavity; a beam wall in the limiting unit is connected with the inner wall of the window beam, and the beam wall abuts against the side wall of the rolling body; and the interval part is connected with the window beam, each containing cavity is divided into two pocket holes by the interval part, and one rolling body is contained in each pocket hole. The technical problem that an existing double-row roller bearing is poor in lubricity is solved.

Description

Technical Field

[0001] The invention relates to the technical field of bearing retainers, and in particular to a double-row roller bearing retainer and a bearing. Background Art

[0002] A cage (also called a bearing cage or bearing retainer) refers to a bearing part that partially wraps all or part of the rolling elements and moves with them. It is used to isolate the rolling elements and usually guides the rolling elements and keeps them in the bearing.

[0003] During the operation of the bearing, the rolling elements will evenly share the load borne by the bearing to ensure its load capacity. In addition to the rolling elements, the cage will also share part of the load. In some working environments with large loads, such as heavy vehicles, the rolling elements and cages are required to have strong load-bearing capacity. As the main load-bearing parts, the load-bearing capacity can be increased by increasing the number of rolling elements. Therefore, double-row roller bearings have appeared. In heavy-load environments, double-row roller bearings usually have poor lubricity. For this reason, a double-row roller bearing cage is proposed to solve the current technical problem of poor lubrication of double-row roller bearings. Summary of the invention

[0004] The main purpose of the present invention is to provide a double-row roller bearing cage and a bearing, aiming to solve the technical problem of poor lubricity of the current double-row roller bearings.

[0005] To achieve the above object, the double-row roller bearing cage proposed in the present invention comprises: End rings, two end rings facing each other and arranged concentrically; A window beam, wherein the window beam connects the two end rings, a plurality of the window beams are evenly arranged along the circumference of the end ring, and a receiving cavity is formed between two adjacent window beams, and two rolling bodies are received in the receiving cavity; A limiting unit, wherein a beam wall in the limiting unit is connected to an inner wall of the window beam, and the beam wall abuts against a side wall of the rolling body; A spacer portion is connected to the window beam, each of the accommodating cavities is divided into two pockets by the spacer portion, and each of the pockets accommodates one rolling body.

[0006] Optionally, in an embodiment of the present invention, the spacer portion is a spacer ring, the spacer ring is located at the center of the two end rings, and the spacer ring is connected to the window beam.

[0007] Optionally, in one embodiment of the present invention, the limiting unit further includes an end wall, and the same pocket hole has two end walls, the two end walls are arranged opposite to each other and are respectively connected to the end ring and the spacer ring.

[0008] Optionally, in one embodiment of the present invention, a reinforcement ring is further included, and the reinforcement ring is connected to the inner wall of the spacer ring.

[0009] Optionally, in an embodiment of the present invention, the reinforcement ring is a ladder, and the bottom surface of the reinforcement ring is connected to the inner wall of the spacing ring.

[0010] Optionally, in one embodiment of the present invention, the window beam is provided with a guide groove, and the guide groove is located on both sides of the pocket.

[0011] Optionally, in one embodiment of the present invention, the guide groove is provided on the outer peripheral surface and / or inner wall surface of the window beam.

[0012] Optionally, in one embodiment of the present invention, the guide groove is an inclined guide groove to guide the lubricating oil to the pocket.

[0013] Optionally, in one embodiment of the present invention, in the circumferential direction, a circular buffer protrusion is provided between two adjacent guide grooves.

[0014] To achieve the above object, the present invention further provides a bearing, comprising the double-row roller bearing cage as described above.

[0015] Compared with the prior art, the present invention can at least achieve the following beneficial effects. In the technical solution of the present invention, two concentric and oppositely arranged end rings and a plurality of window beams connecting the two end rings form the frame of the retaining frame. The plurality of window beams are evenly spaced along the circumference of the end rings, and a receiving cavity for accommodating rolling bodies is formed between two adjacent window beams. In order to improve the bearing capacity of the bearing, the window beam is relatively long so that two rolling bodies can be accommodated in one receiving cavity. During operation, it is necessary to reduce the contact friction between the rolling body and the frame body and between the rolling bodies to improve the service life of the bearing and the stability of operation. For this purpose, a limited position unit and a spacer are arranged in the frame body. The spacer is connected to the window beam, and each receiving cavity is divided into two independent pockets, and each pocket accommodates a rolling body to avoid friction between the rolling bodies during operation. Each pocket is provided with a beam wall that abuts against the side wall of the rolling body to prevent the rolling body from shaking during operation and ensure the stability of the rolling body during operation. By setting the limit unit and the spacer, after the rolling body is installed in the pocket, there is a gap between the rolling body and the frame body, so that lubricating oil can pass through the gap to lubricate the rolling body, thereby solving the technical problem of poor lubrication effect of the current double-row roller bearing. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. 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 creative work.

[0017] Figure 1 It is a structural schematic diagram of an embodiment of a double-row roller bearing cage of the present invention; Figure 2 It is a structural schematic diagram of another embodiment of a double-row roller bearing cage of the present invention; Figure 3 for Figure 2 A partial enlarged view of the middle A; Figure 4 It is a structural schematic diagram of a window beam in a double-row roller bearing cage of the present invention; Figure 5 for Figure 4 A partial enlarged view of point B in the middle; Figure 6 The present invention is a schematic cross-sectional view of a window beam at a location where a guide groove is provided in a double-row roller bearing retainer.

[0018] Description of Figure Numbers: 100, end ring; 200, window beam; 210, guide groove; 220, circular buffer protrusion; 310, beam wall; 311, limit part; 312, guide part; 320, end wall; 400, spacer; 500, reinforcement ring; 600, pocket hole; 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

[0019] 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 described embodiments 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 creative work are within the scope of protection of the present invention.

[0020] 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 components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0021] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0022] 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 used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme that satisfies both A and B. 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 the field to implement. When the combination of technical solutions is 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.

[0023] Reference Figure 1~Figure 3 The present invention provides a double-row roller bearing cage, comprising: End rings 100, two end rings 100 are opposite and concentrically arranged; A window beam 200, the window beam 200 connects the two end rings 100, a plurality of window beams 200 are evenly arranged along the circumference of the end ring 100, and a receiving cavity is formed between two adjacent window beams 200, and two rolling bodies are received in the receiving cavity; A limiting unit, wherein a beam wall 310 in the limiting unit is connected to an inner wall of the window beam 200, and the beam wall 310 abuts against a side wall of the rolling body; The spacer 400 is spaced and connected to the window beam 200 . Each accommodating cavity is divided into two pockets 600 by the spacer 400 . Each pocket 600 accommodates a rolling body.

[0024] In the technical solution of the present invention, two concentric and oppositely arranged end rings 100 and a plurality of window beams 200 connecting the two end rings 100 form the frame of the retainer. The plurality of window beams 200 are evenly spaced along the circumference of the end ring 100. A receiving cavity for receiving a rolling body is formed between two adjacent window beams 200. In order to improve the bearing capacity of the bearing, the window beam 200 is relatively long so as to receive two rolling bodies in one receiving cavity. During operation, it is necessary to reduce the contact friction between the rolling body and the frame and between the rolling bodies to improve the service life of the bearing and the stability of operation. For this purpose, a limited position unit and a spacer 400 are provided in the frame. The spacer 400 is connected to the window beam 200, and each receiving cavity is divided into two independent pockets 600. Each pocket 600 receives a rolling body to avoid friction between the rolling bodies during operation. A beam wall 310 is provided in each pocket 600 to abut against the side wall of the rolling body to prevent the rolling body from shaking during operation and ensure the stability of the rolling body during operation. By setting the limiting unit and the spacer 400, after the rolling body is installed in the pocket 600, the rolling body is limited, and a gap is created between the rolling body and the frame to allow lubricating oil to pass through the gap to lubricate the rolling body, thereby solving the current technical problem of poor lubrication effect of double-row roller bearings.

[0025] Specifically, in one embodiment, the rolling element is a needle roller, that is, the retainer is a needle roller bearing retainer. Although it has a smaller cross-section, the needle roller bearing still has a higher load-bearing capacity. The needle roller bearing is equipped with thin and long rolling elements, so the radial structure is compact. When its inner diameter size and load capacity are the same as those of other types of bearings, the outer diameter is the smallest, which is particularly suitable for support structures with limited radial installation dimensions.

[0026] Reference Figure 1 In one embodiment, the spacer 400 is a protruding structure that separates the rolling elements, so that the rolling elements can rotate independently and stably during operation. The rolling elements that operate with high stability can reduce the vibration and noise inside the bearing and improve the stability of the bearing operation. After the rolling elements in the same row are separated, the contact area between the rolling elements can be reduced, thereby reducing the friction coefficient and wear rate, and improving the operating efficiency and life of the bearing. In addition, after the rolling elements are separated, the gap formed between the two rolling elements can provide a better flow path for the lubricating oil, ensuring that the lubricant can be evenly distributed on each rolling element.

[0027] Specifically, the structure of the protrusion is preferably hemispherical, which can reduce the contact area between the protrusion and the rolling body and reduce the friction between the protrusion and the rolling body. In addition, the hemispherical protrusion will not divide the same window hole into two completely independent spaces, and a gap is formed between the two hemispherical protrusions, which facilitates the lubricating oil to flow through and lubricate the end surface of the rolling body.

[0028] Reference Figure 2~Figure 3In another embodiment, the structure of the spacer 400 is a spacer ring, which is located between the two end rings 100 and connected to the middle of the window beam 200. In addition to preventing the rolling elements from generating friction during operation, the spacer ring can also enhance the structural strength of the cage. In a double roller bearing, in addition to the rolling elements, the cage is also the main structure that bears the load. Therefore, the structural strength of the cage also directly affects the load that the bearing can bear. When the bearing encounters a large axial impact, the spacer ring can prevent the cage from being deformed or damaged due to the provision of the spacer ring.

[0029] It can be understood that the annular spacer 400 can improve the structural strength of the retainer, and the convex spacer 400 can form a flow path for lubricating the end faces of the rolling elements. Therefore, the specific structure of the spacer 400 can be selected according to specific working requirements.

[0030] The limiting unit has not only the beam wall 310 structure but also the end wall 320 structure. The limiting unit will be described with reference to the pocket 600 when the spacer 400 is an annular structure.

[0031] In each pocket 600, four beam walls 310 are preferably provided, and the four beam walls 310 are symmetrically arranged on the two side walls of the pocket 600 to limit the two sides of the rolling body to prevent it from shaking during operation. Specifically, the beam wall 310 has a limiting portion 311 and a guide portion 312, wherein the limiting portion 311 abuts against the side wall of the rolling body to limit the running path of the rolling body, and the guide portion 312 is an inclined structure, which can guide the lubricating oil to flow between the rolling body and the limiting portion 311.

[0032] In addition to the four beam walls 310, in order to solve the technical problem of the large friction area between the rolling body and the end ring 100 and the spacer ring, two end walls 320 are also provided, one of the two end walls 320 is connected to the end ring 100, and the other is connected to the spacer ring, and the two end walls 320 are arranged opposite to each other. Specifically, the structure of the end wall 320 is a ladder, wherein the shorter top surface of the ladder abuts against the side wall of the rolling body, which not only reduces the contact area between the rolling body and the end ring 100 or the spacer ring, but also limits the rolling body in its axial direction, thereby improving the stability of the rolling body during operation. In addition, since the two sides of the ladder structure are inclined surfaces, a gap can be generated between the end face of the rolling body and the end ring 100 or the spacer ring, providing a path for the flow of lubricating oil, so that the lubricating oil can lubricate the end face of the rolling body.

[0033] During the rolling of the cage, since the spacer ring is located at the center of the entire cage, it needs to withstand the extrusion force generated by the rolling elements on both sides, so the spacer ring is prone to deformation or damage after long-term operation. In order to improve the structural strength of the spacer ring, a reinforcement ring 500 is provided to connect with the inner wall of the spacer ring.

[0034] As a preferred embodiment, the structure of the reinforcement ring 500 is the same as that of the end wall 320, and is also a ladder. The ladder of the reinforcement ring 500 surrounds the inner wall of the spacer ring, and the two inclined surfaces of the ladder of the reinforcement ring 500 face the pockets 600 on both sides, respectively, to guide oil into the pockets 600 on both sides. The reinforcement ring 500 with a semi-cylindrical structure can also achieve the effect of guiding oil into the pockets 600 on both sides, but compared with the ladder structure, the structural strength of the semi-cylindrical structure is lower, so the reinforcement ring 500 with a ladder structure is preferred.

[0035] Reference Figure 4~Figure 6 In order to further improve the lubrication effect on the rolling element, a guide groove 210 is provided on the window beam 200, and the guide groove 210 is provided on both sides of the pocket 600. During the operation of the bearing, the lubricating oil in the bearing will also flow in the bearing as the rolling element rotates. In order to allow a sufficient amount of lubricating oil to flow to the rolling element during the flow, the guide groove 210 is an oblique guide groove 210. Specifically, a guide groove 210 is provided in the middle position on both sides of each pocket 600. Since the beam wall 310 is provided on both sides of the inner wall of the pocket 600, the guide groove 210 located in the middle position faces the gap formed between the rolling element and the window beam 200, so that the lubricating oil in the guide groove 210 can flow directly between the rolling element and the window beam 200, thereby improving the heat dissipation efficiency and reducing the noise generation.

[0036] As a preferred embodiment, guide grooves 210 are provided on both the outer peripheral surface and the inner wall surface of the window beam 200 to improve the lubrication effect by guiding the flow on both sides.

[0037] In addition, refer to Figure 6 , Figure 6 The middle arrow indicates the flow direction of the lubricating oil during the operation of the bearing. Since the operation direction of the bearing is fixed during the operation, but guide grooves 210 are provided on both sides of each pocket 600, one of the two guide grooves 210 can supply oil into the pocket 600, and the other can discharge oil out of the pocket 600. There is a large flow resistance between two circumferentially adjacent guide grooves 210 on the same window beam 200, which will affect the high-speed operation of the bearing. In order to reduce the resistance generated by the guide groove 210 during the flow of the lubricating oil, a circular buffer protrusion 220 is provided. After the circular buffer protrusion 220 is provided, the flow path between the two adjacent guide grooves 210 is relatively smooth, and the flow resistance of the lubricating oil is reduced. When the lubricating oil flows out of one guide groove 210, it can quickly flow to the next guide groove 210 through the annular buffer protrusion 220 and enter the next pocket 600. In addition to the lubrication function, the rapid flow of lubricating oil can also accelerate the heat dissipation to prevent the parts from deforming at high temperatures.

[0038] In addition, to improve the overall structural strength of the frame, the end ring 100, window beam 200 and other parts can be integrally formed and then finely processed to meet the size requirements, thereby reducing the connection points between multiple parts and reducing the risk of fracture at the connection. The surface of the frame can also be sprayed with a chromium oxide coating, a nitride coating, etc. to improve its wear resistance.

[0039] 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 at least has all the beneficial effects brought by the technical solutions of the above embodiment, which will not be repeated here one by one.

[0040] The above descriptions are only optional embodiments of the present invention, and are not intended to limit the patent scope of the present invention. All equivalent structural changes made using the contents of the present invention's specification and drawings, or directly / indirectly applied in other related technical fields, are included in the patent protection scope of the present invention.

Claims

1. A double-row roller bearing cage, characterized in that: include: End rings, two end rings facing each other and arranged concentrically; A window beam, wherein the window beam connects the two end rings, a plurality of the window beams are evenly arranged along the circumference of the end ring, and a receiving cavity is formed between two adjacent window beams, and two rolling bodies are received in the receiving cavity; A limiting unit, wherein a beam wall in the limiting unit is connected to an inner wall of the window beam, and the beam wall abuts against a side wall of the rolling body; A spacer portion is connected to the window beam, each of the accommodating cavities is divided into two pockets by the spacer portion, and each of the pockets accommodates one rolling body.

2. The double row roller bearing cage according to claim 1, characterized in that: The spacer portion is a spacer ring, the spacer ring is located at the center of the two end rings, and the spacer ring is connected to the window beam.

3. The double row roller bearing cage according to claim 2, characterized in that: The limiting unit also includes an end wall. The same pocket hole has two end walls, which are arranged opposite to each other and are respectively connected to the end ring and the spacer ring.

4. The double row roller bearing cage according to claim 2, characterized in that: A reinforcement ring is also included, and the reinforcement ring is connected to the inner wall of the spacer ring.

5. The double row roller bearing cage according to claim 4, characterized in that: The reinforcement ring is a ladder, and the bottom surface of the reinforcement ring is connected to the inner wall of the spacing ring.

6. The double row roller bearing cage according to claim 1, characterized in that: The window beam is provided with a guide groove, and the guide groove is located on both sides of the pocket hole.

7. The double row roller bearing cage according to claim 6, characterized in that: The guide groove is arranged on the outer peripheral surface and / or the inner wall surface of the window beam.

8. The double row roller bearing cage according to claim 6, characterized in that: The guide groove is an oblique guide groove to guide the lubricating oil to the pocket.

9. The double row roller bearing cage according to claim 6, characterized in that: In the circumferential direction, a circular buffer protrusion is provided between two adjacent guide grooves.

10. A bearing, characterized in that: The invention comprises a double-row roller bearing cage as claimed in any one of claims 1 to 9.

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