Low-noise retainer and bearing

Abstract

The utility model belongs to the technical field of bearings, and relates to a low-noise retainer and a bearing. The low-noise retainer comprises an annular retainer body and a plurality of friction plates, the friction plates are installed on the retainer body, the friction coefficient of the friction plates is smaller than that of the retainer body, a plurality of pockets are formed in the circumferential direction of the retainer body at intervals, friction holes are formed in the friction plates, and the shapes of the friction holes are matched with the shapes of the pockets. The size of the friction hole is smaller than that of the pocket, and the center lines of the pocket and the friction hole coincide. The bearing comprises an inner ring, a rolling body, an outer ring and a low-noise retainer, wherein the low-noise retainer is arranged between the inner ring and the outer ring. By arranging the friction plate on the retainer, original sliding friction between the steel retainer and the steel rolling body can be converted into sliding friction between the steel rolling body and the friction plate with a low friction coefficient, so that not only is the friction resistance of the bearing reduced, but also the noise generated by friction is reduced.

Description

Technical Field

[0001] The utility model relates to a low-noise retaining frame and a bearing, belonging to the technical field of bearings. Background Art

[0002] The structure of the bearing mainly includes a cage, an inner ring, an outer ring and rolling elements. Among them, the function of the cage is to limit the movement of the rolling elements. The inner circle of the traditional cage is in direct contact with the rolling elements, and sliding friction is inevitable between the two.

[0003] When the bearing is working, especially the slewing support rotating at high speed, this sliding friction not only causes serious noise problems, but also as the use time increases, long-term high-speed rotation and wear will cause wear iron chips on the surface of the cage, which will pollute the internal environment of the bearing and affect its overall performance. More seriously, as the wall thickness of the cage continues to decrease, its structural strength gradually decreases, which may eventually cause the cage to break, causing equipment failure and seriously affecting the service life and safety of the bearing. Utility Model Content

[0004] The purpose of the utility model is to provide a new technical solution to improve or solve the technical problems existing in the prior art as described above.

[0005] The technical solution provided by the utility model is as follows: a low-noise retainer, comprising an annular retainer body and a plurality of friction plates, wherein the friction plates are mounted on the retainer body, the friction coefficient of the friction plates is smaller than the friction coefficient of the retainer body, a plurality of pockets are arranged at intervals in the circumferential direction of the retainer body, friction holes are provided on the friction plates, the shape of the friction holes is matched with the shape of the pockets, the size of the friction holes is smaller than the size of the pockets, and the pockets coincide with the center lines of the friction holes.

[0006] Compared with the prior art, the technical solution provided by the utility model has the following beneficial effects: by arranging a friction plate on the retaining frame, the sliding friction between the original steel retaining frame and the steel rolling element can be converted into the sliding friction between the steel rolling element and the friction plate with a low friction coefficient, which not only reduces the friction resistance of the bearing, but also reduces the noise generated by friction, thereby meeting the production requirements for lower friction resistance and lower friction noise.

[0007] On the basis of the above technical solution, the present invention can also be improved as follows.

[0008] Furthermore, the pocket hole and the friction hole are both circular holes, and the diameter of the friction hole is smaller than the diameter of the pocket hole.

[0009] The beneficial effect of adopting the above further scheme is that the pocket of the ball rolling bearing is circular. When the steel ball rotates in the pocket, since the diameter of the friction hole of the friction plate is smaller than the diameter of the pocket, the steel ball first contacts the friction plate and generates sliding friction. Since the friction coefficient of the friction plate is low, this can significantly reduce the friction force generated by the rolling of the steel ball, thereby reducing the wear and noise caused by friction, improving the reliability and quietness of the bearing, and increasing the service life of the bearing.

[0010] Furthermore, the pocket hole and the friction hole are both square holes or trapezoidal holes.

[0011] The beneficial effect of adopting the above further solution is that when the support bearing is a cylindrical roller bearing, the pocket hole is a square hole, and when the support bearing is a tapered roller bearing, the pocket hole is a trapezoidal hole.

[0012] Furthermore, the friction plate is located on the inner side, outer side or inner edge surface of the pocket.

[0013] Furthermore, the friction plate is fixed to the retainer body by rivets or glue.

[0014] The beneficial effect of adopting the above further solution is that the friction plate is fixed by rivets or glue, which can ensure a firm connection between the friction plate and the retainer body and prevent loosening or falling off due to vibration or impact during the operation of the bearing.

[0015] Furthermore, the friction plate is a polytetrafluoroethylene plate, a polyethylene plate, a polycarbonate plate, a bisphenol A type polysulfone plate, a polyimide plate, a multilayer alloy plate or a powder metallurgy plate.

[0016] The beneficial effect of adopting the above further solution is that the plate of the above material has a lower friction coefficient, which greatly reduces the friction between the rolling body and the friction plate, thereby reducing energy loss and wear.

[0017] Furthermore, the friction plate and the pocket are arranged at intervals.

[0018] The beneficial effect of adopting the above further solution is that the friction resistance can be reduced and the service life can be extended.

[0019] Furthermore, the friction plate is provided on one side of each pocket.

[0020] The beneficial effect of adopting the above further solution is that the friction resistance can be reduced to the maximum extent and the service life can be extended.

[0021] Another technical solution provided by the utility model is as follows: a bearing, comprising an inner ring, rolling elements and an outer ring, and also comprising the low-noise retaining frame, wherein the low-noise retaining frame is arranged between the inner ring and the outer ring, and the rolling elements are arranged in the pockets of the low-noise retaining frame.

[0022] Compared with the prior art, the technical solution provided by the utility model has the following beneficial effects: by arranging a friction plate on the retaining frame, the sliding friction between the original steel retaining frame and the steel rolling element can be converted into the sliding friction between the steel rolling element and the friction plate with a low friction coefficient, which not only reduces the friction resistance of the bearing, but also reduces the noise generated by friction, thereby meeting the production requirements for lower friction resistance and lower friction noise.

[0023] Furthermore, it also includes a sealing belt, which is installed between the inner ring and the outer ring.

[0024] The beneficial effect of adopting the above further solution is that the sealing belt is used to prevent the lubricating oil in the bearing from leaking and can prevent dust, water and impurities from entering the interior of the bearing. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the utility model 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 embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0026] Figure 1 It is a three-dimensional structural schematic diagram of the low-noise cage of the utility model;

[0027] Figure 2 For the utility model Figure 1 A top view of

[0028] Figure 3 For the utility model Figure 2 AA section view;

[0029] Figure 4 For the utility model Figure 2 A schematic diagram of the enlarged structure at K;

[0030] Figure 5 A partial cross-sectional view of a bearing according to Embodiment 1 of the present utility model;

[0031] Figure 6 For the utility model Figure 4 A schematic diagram of the enlarged structure at B;

[0032] Figure 7 A partial cross-sectional view of a bearing according to Embodiment 2 of the present utility model;

[0033] Figure 8 For the utility model Figure 6 A schematic diagram of the enlarged structure at C;

[0034] Fig. 9 It is a partial cross-sectional view of a bearing according to Embodiment 3 of the present utility model;

[0035] Fig.10 For the utility model Figure 8 A schematic diagram of the structure at D of FIG.

[0036] Fig.11 This is a schematic diagram of the structure of the fourth embodiment of the present utility model;

[0037] Fig.12 This is a structural schematic diagram of Embodiment 5 of the present utility model;

[0038] In the figure, 100, low-noise cage; 110, cage body; 111, pocket; 120, friction plate; 121, friction hole; 130, rivet; 200, bearing; 210, inner ring; 220, rolling element; 230, outer ring; 240, sealing belt. DETAILED DESCRIPTION

[0039] The principles and features of the present invention are described below in conjunction with examples. The examples are only used to explain the present invention and are not used to limit the scope of the present invention.

[0040] Embodiment 1:

[0041] like Figure 1 - Figure 4 As shown, a low noise retainer includes an annular retainer body 110 and a plurality of friction plates 120, wherein the friction plates 120 are mounted on the retainer body 110, the friction coefficient of the friction plates 120 is smaller than the friction coefficient of the retainer body 110, a plurality of pockets 111 are provided at intervals in the circumferential direction of the retainer body 110, the friction holes 121 are provided on the friction plates 120, the shape of the friction holes 121 is matched with the shape of the pockets 111, the size of the friction holes 121 is smaller than the size of the pockets 111, and the center lines of the pockets 111 and the friction holes 121 coincide with each other.

[0042] The pocket hole 111 and the friction hole 121 are both circular holes, and the diameter of the friction hole 121 is smaller than the diameter of the pocket hole 111 .

[0043] The friction plate 120 is located outside the pocket 111 .

[0044] The embodiment of the present invention does not limit the fixing method of the friction plate 120 on the retaining frame body 110. The friction plate 120 can be fixed to the retaining frame body 110 by rivets 130 or glue. As long as the fixing method meets the use requirements, it should be within the protection scope of the present invention.

[0045] The embodiment of the utility model does not limit the material of the friction plate 120, and the friction plate 120 can be a polytetrafluoroethylene plate (PTFE plate), a polyethylene plate (PE plate), a polycarbonate plate (PC plate), a bisphenol A type polysulfone plate (PSF plate), a polyimide plate (PI plate), a multilayer alloy plate or a powder metallurgy plate. As long as the friction coefficient of the friction plate 120 is less than the friction coefficient of the retainer body 110, the effect of reducing friction resistance can be achieved. For example, the friction plate 120 adopts a polytetrafluoroethylene plate with a low friction coefficient, and the sliding friction between the rolling element 220 made of steel and the polytetrafluoroethylene plate with a low friction coefficient can reduce friction resistance and reduce noise.

[0046] The embodiment of the utility model does not limit the number of the friction plates 120, and the number of the friction plates 120 can be less than or equal to the number of the pockets 111. When the friction plates 120 are installed near each of the pockets 111, the friction resistance can be reduced to the maximum extent and the service life can be extended. In this case, the number of the friction plates 120 is equal to the number of the pockets 111; the friction plates 120 can also be arranged at intervals, in which case the number of the friction plates 120 is less than the number of the pockets 111.

[0047] like Figure 5 and Figure 6 As shown, a bearing comprises an inner ring 210 , rolling elements 220 and an outer ring 230 , and also comprises the low-noise retaining frame 100 , wherein the low-noise retaining frame 100 is arranged between the inner ring 210 and the outer ring 230 , and the rolling elements 220 are arranged in the pockets 111 of the low-noise retaining frame 100 .

[0048] The sealing strip 240 is installed between the inner ring 210 and the outer ring 230. The sealing strip 240 is used to prevent the lubricating oil in the bearing 200 from leaking and can prevent dust, water, and impurities from entering the interior of the bearing 200.

[0049] Embodiment 2:

[0050] like Figure 7 and Figure 8 As shown, a low noise retainer is different from the first embodiment in that the friction plate 120 is fixed on the inner side of the pocket 111 .

[0051] Embodiment three:

[0052] like Fig. 9 and Fig.10 As shown, a low noise retaining frame is different from the first embodiment in that the friction plate 120 is located on the inner edge surface of the pocket 111.

[0053] Embodiment 4:

[0054] like Fig.11 As shown, a low noise retaining frame is different from the first embodiment. The pocket 111 and the friction hole 121 are both square holes, the size of the friction hole 121 is smaller than the size of the pocket 111, and the center lines of the pocket 111 and the friction hole 121 coincide with each other.

[0055] Embodiment five:

[0056] like Fig.12 As shown, a low noise retaining frame is different from the first embodiment. The pocket 111 and the friction hole 121 are both trapezoidal holes, the size of the friction hole 121 is smaller than the size of the pocket 111, and the center lines of the pocket 111 and the friction hole 121 coincide with each other.

[0057] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A low noise cage, characterized in that: The invention comprises an annular retainer body (110) and a plurality of friction plates (120), wherein the friction plates (120) are mounted on the retainer body (110), the friction coefficient of the friction plates (120) is smaller than the friction coefficient of the retainer body (110), a plurality of pockets (111) are arranged at intervals in the circumferential direction of the retainer body (110), the friction plates (120) are provided with friction holes (121), the shape of the friction holes (121) is matched with the shape of the pockets (111), the size of the friction holes (121) is smaller than the size of the pockets (111), and the center lines of the pockets (111) and the friction holes (121) coincide with each other.

2. The low noise cage according to claim 1, characterized in that: The pocket hole (111) and the friction hole (121) are both circular holes, and the diameter of the friction hole (121) is smaller than the diameter of the pocket hole (111).

3. The low noise cage according to claim 1, characterized in that: The pocket hole (111) and the friction hole (121) are both square holes or trapezoidal holes.

4. The low noise cage according to any one of claims 1 to 3, characterized in that: The friction plate (120) is located on the inner side, outer side or inner edge surface of the pocket hole (111).

5. The low noise cage according to claim 4, characterized in that: The friction plate (120) is fixed to the retainer body (110) by means of rivets (130) or glue.

6. The low noise cage according to claim 5, characterized in that: The friction plate (120) is a polytetrafluoroethylene plate, a polyethylene plate, a polycarbonate plate, a bisphenol A type polysulfone plate, a polyimide plate, a multilayer alloy plate or a powder metallurgy plate.

7. The low noise cage according to claim 1, characterized in that: The friction plate (120) and the pocket (111) are arranged at intervals.

8. The low noise cage according to claim 1, characterized in that: The friction plate (120) is provided on one side of each pocket (111).

9. A bearing, comprising an inner ring (210), rolling elements (220) and an outer ring (230), characterized in that: It also includes the low-noise retaining frame according to any one of claims 1 to 8, wherein the low-noise retaining frame is arranged between the inner ring (210) and the outer ring (230), and the rolling body (220) is arranged in the pocket (111) of the low-noise retaining frame.

10. The bearing according to claim 9, characterized in that It also includes a sealing belt (240), which is installed between the inner ring (210) and the outer ring (230).

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