Plastic-coated bearing outer ring

Abstract

The plastic-coated bearing outer ring comprises a bearing outer ring body and a plastic-coated ring, a plurality of anti-skid grooves are formed in the outer side of the bearing outer ring body, a plurality of anti-skid protruding blocks are arranged on the inner side of the plastic-coated ring body, the anti-skid grooves and the anti-skid protruding blocks are connected in a matched mode, and the anti-skid grooves are arranged in a staggered mode in the height direction of the bearing outer ring body. The position and the angle of each anti-skidding protruding block slightly deviate, the structure can evenly distribute loads and provide more stable anti-skidding performance, and when one anti-skidding protruding block is broken, other protruding blocks around the anti-skidding protruding block can still bear part of the loads and provide the anti-skidding function. Meanwhile, the side edge length of the anti-skid grooves in the circumferential direction is larger than that of the anti-skid grooves in the height direction of the bearing outer ring, so that the structures of the anti-skid convex blocks in the circumferential direction are thickened and enhanced, the bending resistance can be improved, fatigue fracture is not prone to occurring under positive and negative rotation pressure bearing alternate operation of the bearing, and the service life of the bearing is prolonged. The service life of the plastic-coated bearing can be prolonged, and the combination of the plastic-coated part and the bearing outer ring is firmer.

Description

Technical Field

[0001] The present application belongs to the field of bearings, and in particular relates to a plastic-coated bearing outer ring. Background Art

[0002] Plastic coated bearings generally refer to bearings that are coated with a layer of plastic on the outside. The plastic material is generally nylon PA, polyoxymethylene POM, polyurethane PU, and engineering plastic polypropylene PP. Bearing coating increases the impact resistance, wear resistance, self-lubrication, and quietness of the bearing during operation. Plastic coated bearings are suitable for various equipment and industrial fields that need to support rotational motion to ensure the smooth operation and long-term reliability of the equipment.

[0003] When the plastic-coated bearing rotates as a support, due to the load-bearing pressure on the external plastic layer, there is a problem of loose connection between the plastic and the outer ring of the bearing. Chinese patent No. 202120925784.4 discloses an outer ring plastic-coated bearing, and discloses that by providing a number of positioning grooves evenly arranged along the circumferential direction of the outer ring on the outer side of the outer ring, and providing a number of positioning protrusions on the inner side of the plastic-coated ring to cooperate with the positioning grooves, the fastening effect of the plastic-coated ring and the outer ring of the bearing can be improved. Under the condition of alternating forward and reverse rotation of the bearing, the positioning protrusion will be subjected to forces in both positive and negative directions, resulting in premature fatigue fracture of the positioning protrusion. As long as one positioning protrusion breaks, the overall anti-slip effect will drop rapidly, which will affect the overall force uniformity of the plastic-coated bearing and affect the normal operation and stability of the bearing. It can be seen that the existing technology needs to be further improved and improved. Utility Model Content

[0004] The utility model provides a plastic coated bearing outer ring to solve the problem that the positioning protrusion is prone to fatigue fracture under the condition of the bearing's positive and reverse alternating pressure-bearing operation, resulting in a rapid decrease in the overall anti-skid effect of the bearing and affecting the stability of the plastic coated bearing.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A plastic-coated bearing outer ring comprises a bearing outer ring and a plastic-coated ring, wherein a plurality of anti-skid grooves are arranged on the outer side of the bearing outer ring, and a plurality of anti-skid protrusions are arranged on the inner side of the plastic-coated ring, wherein the anti-skid grooves and the anti-skid protrusions are cooperatively connected, wherein the anti-skid grooves are staggeredly arranged along the height direction of the bearing outer ring, and the side length of the anti-skid groove along the circumferential direction is greater than the side length along the height direction of the bearing outer ring, so as to provide stable and reliable anti-skid performance.

[0007] The utility model discloses a plastic-coated bearing outer ring which is firmly combined, and the anti-skid protrusions are connected up and down in a staggered arrangement along the height direction of the bearing outer ring. Through the staggered arrangement, the position and angle of each anti-skid protrusion are slightly offset to form a staggered grid structure, which can evenly distribute the load and provide more stable anti-skid performance. When an anti-skid protrusion breaks, the other protrusions around it can still continue to bear part of the load and provide an anti-skid function. At the same time, the present application sets the side length of the anti-skid groove along the circumferential direction to be greater than the side length along the height direction of the bearing outer ring. In this way, the structure of the anti-skid protrusion along the circumferential direction is thickened and strengthened, which can improve the bending resistance and is not prone to fatigue fracture under the alternating operation of the bearing under positive and reverse pressure, which can extend the service life of the plastic-coated bearing. The combination of the plastic-coated part and the bearing outer ring is more firmly, and the bearing composed of the plastic-coated bearing outer ring can prevent current from passing through the bearing and the retaining frame, thereby avoiding corrosion and damage to the bearing by the current and protecting the retaining frame from damage.

[0008] In a preferred implementation, the anti-skid groove is low in the middle and high at two sides, and the two sides of the anti-skid groove are symmetrical with respect to the middle.

[0009] The symmetrical design with a low middle and high ends can increase the stability of the entire anti-skid groove system. The higher parts at both ends can provide additional support to prevent uneven displacement or deformation of the anti-skid bumps when subjected to force.

[0010] In a preferred implementation, the cross-sectional shape of the anti-skid groove is an isosceles triangle / arch, and the shape of the anti-skid protrusion is adapted to the anti-skid groove.

[0011] In a preferred implementation, the depth D of the anti-slip groove is 1%-3% of the width B of the bearing outer ring, so as to ensure that the bearing outer ring has a high structural strength.

[0012] In a preferred implementation, the length L of the anti-slip groove is 1 / 20-1 / 15 of the circumference C of the bearing outer ring.

[0013] In a preferred implementation, anti-skid grooves are provided on the upper, lower and middle parts of the bearing outer ring, and the upper anti-skid groove, the middle anti-skid groove and the lower anti-skid groove are vertically staggered along the height direction of the bearing outer ring.

[0014] In a preferred implementation, an annular groove is provided on the inner wall edge of the bearing outer ring, and mating parts that cooperate with the annular groove are provided on both sides of the plastic-coated ring. The mating parts are connected to the annular groove to prevent the plastic-coated ring from detaching from the bearing outer ring.

[0015] By providing the annular groove and the matching part, the plastic-coated ring and the outer ring of the bearing are firmly connected or engaged, thereby increasing the stability and reliability of the structure, and providing double protection to prevent the plastic-coated ring from separating from the outer ring of the bearing.

[0016] In a preferred implementation, limiting portions are provided at intervals in the annular groove to limit the rotation of the matching portion.

[0017] In a preferred implementation, the plastic-coating ring is made of pps resin.

[0018] Plastic-coated rings made of PPS (polyphenylene sulfide) resin have the advantages of high temperature resistance, excellent insulation performance, corrosion resistance, mechanical strength and dimensional stability, and are suitable for bearing use conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present application and do not constitute an improper limitation on the present invention. In the drawings:

[0020] Figure 1 A schematic diagram of a three-dimensional structure of an exemplary embodiment of the outer ring of the bearing of the present application is depicted;

[0021] Figure 2 A schematic diagram of a three-dimensional structure of a schematic implementation of the plastic-wrapped ring of the present application is depicted;

[0022] Figure 3 A schematic cross-sectional structure diagram of an exemplary embodiment of the cooperation between the outer ring of the bearing and the plastic-coated ring of the present application is depicted;

[0023] Description of labels:

[0024] 1-bearing outer ring; 10-anti-skid groove; 11-annular groove; 110-limiting part; 2-plastic-coated ring; 20-anti-skid protrusion; 21-matching part. DETAILED DESCRIPTION

[0025] In the following, only some exemplary embodiments are briefly described. As those skilled in the art will appreciate, the described embodiments may be modified in various ways without departing from the spirit and scope of the present invention. Therefore, the drawings and descriptions are considered to be exemplary and non-restrictive in nature.

[0026] In the description of the present invention, it is necessary to understand that the terms "center", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In the present invention, unless otherwise clearly specified and limited, a first feature being "upper" or "lower" than a second feature may be the first and second features directly contacting, or the first and second features indirectly contacting through an intermediate medium.

[0027] In the present utility model, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral one; it can be directly connected, or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. However, if it is indicated as a direct connection, it means that the two connected bodies are not connected through an intermediate structure, but are connected to form a whole only through a connecting structure. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to the specific circumstances.

[0028] In 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 the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features.

[0029] The utility model is described below in conjunction with the accompanying drawings.

[0030] The specific plans adopted are:

[0031] like Figure 1-3 As shown, the utility model provides a plastic-coated bearing outer ring, comprising a bearing outer ring 1 and a plastic-coated ring 2, a plurality of anti-skid grooves 10 are provided on the outer side of the bearing outer ring 1, a plurality of anti-skid protrusions 20 are provided on the inner side of the plastic-coated ring 2, the anti-skid grooves 10 and the anti-skid protrusions 20 are cooperatively connected, the anti-skid grooves 10 are staggered along the height direction of the bearing outer ring 1, the side length of the anti-skid grooves 10 along the circumferential direction is greater than the side length along the height direction of the bearing outer ring 1, so as to provide stable and reliable anti-skid performance.

[0032] The anti-skid protrusions 20 of the plastic-coated bearing outer ring of the utility model are connected up and down in a staggered arrangement along the height direction of the bearing outer ring 1. Through the staggered arrangement, the position and angle of each anti-skid protrusion 20 are slightly offset to form a staggered grid structure. This structure can evenly distribute the load and provide more stable anti-skid performance. When an anti-skid protrusion 20 breaks, the other protrusions around it can still continue to bear part of the load and provide anti-skid function. At the same time, the application sets the side length of the anti-skid groove 10 along the circumferential direction to be greater than the side length along the height direction of the bearing outer ring 1. In this way, the structure of the anti-skid protrusion 20 along the circumferential direction is thickened and strengthened, which can improve the bending resistance and is not prone to fatigue fracture under the alternating operation of the bearing under positive and reverse pressure. The service life of the plastic-coated bearing can be extended, and the combination of the plastic-coated part and the bearing outer ring 1 is more reliable.

[0033] As a preferred embodiment of the present application, the anti-skid groove 10 is low in the middle and high at both sides, and the two sides of the anti-skid groove 10 are symmetrical with respect to the middle.

[0034] The design of the anti-slip groove 10 being low in the middle and high at both ends and symmetrical with respect to the middle can help the anti-slip block to disperse the force and reduce the risk of bending. Specifically, this design can bring the following benefits:

[0035] The symmetrical design of being low in the middle and high at both ends can increase the stability of the entire anti-skid groove 10 system, and the higher parts at both ends can provide additional support to prevent uneven displacement or deformation of the anti-skid protrusion 20 when subjected to force.

[0036] As a preferred example of the present embodiment, the cross-sectional shape of the anti-skid groove 10 is an isosceles triangle / arch, and the shape of the anti-skid protrusion 20 is adapted to the anti-skid groove 10 .

[0037] Isosceles triangle and arch are stable structures with high rigidity and bending resistance. The three sides of the isosceles triangle support each other and can evenly disperse the pressure when subjected to external force. When the external force acts on the two hypotenuses of the triangle, the force will be transmitted along the hypotenuse and dispersed to the other hypotenuses because there are vertices between the hypotenuses as support. In this way, there will not be too much stress concentrated on a certain hypotenuse, and the deformation is small after the force is applied, thus reducing the possibility of bending.

[0038] As a preferred embodiment of the present application, the depth D of the anti-skid groove 10 is 1%-3% of the ring width B of the bearing outer ring 1 .

[0039] As a preferred embodiment of the present application, the length L of the anti-skid groove 10 is 1 / 20-1 / 15 of the circumference C of the bearing outer ring 1 .

[0040] The depth D and length L of the anti-skid groove 10 are designed to ensure that the anti-skid protrusion 20 and the anti-skid groove 10 have good bonding properties so that the bearing outer ring 1 has a higher structural strength, and the design is more reasonable.

[0041] As a preferred embodiment of the present application, anti-skid grooves 10 are provided on the upper, lower and middle parts of the bearing outer ring 1, and the upper anti-skid groove 10, the middle anti-skid groove 10 and the lower anti-skid groove 10 are vertically staggered along the height direction of the bearing outer ring 1.

[0042] As a preferred embodiment of the present application, an annular groove 11 is provided on the inner wall edge of the bearing outer ring 1, and mating parts 21 that cooperate with the annular groove 11 are provided on both sides of the plastic-coated ring 2. Specifically, limiting parts 110 are provided at intervals in the annular groove 11 to limit the rotation of the mating parts 21, thereby achieving a firm connection or bite between the plastic-coated ring 2 and the bearing outer ring 1, thereby increasing the stability and reliability of the structure and providing double protection to prevent the plastic-coated ring 2 from detaching from the bearing outer ring 1.

[0043] As a preferred embodiment of the present application, the plastic-coating ring is made of pps resin.

[0044] PPS polyphenylene sulfide resin material characteristics have excellent long-term heat resistance; low mold shrinkage, low linear thermal expansion and low water absorption. Therefore, even in high temperature and high humidity environments, it still has excellent dimensional stability, and has excellent chemical resistance (chemical resistance) comparable to fluororesins; even in high temperature environments, it still has high strength, high rigidity and low cracking performance. In addition, it also has good fatigue resistance and creep resistance. It can reach UL94V-0 grade (mechanical properties) without adding any flame retardants. It still has excellent electrical properties in high temperature, high humidity and high frequency environments, has good flow properties, and can be processed by injection molding similar to general engineering plastics.

[0045] The parts not described in the present invention can be realized by adopting or drawing on the existing technology.

[0046] The above are only specific implementations of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of various changes or substitutions within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A plastic coated bearing outer ring, comprising a bearing outer ring and a plastic coated ring, wherein the outer side of the bearing outer ring is provided with a plurality of anti-skid grooves, the inner side of the plastic coated ring is provided with a plurality of anti-skid bumps, the anti-skid grooves and the anti-skid bumps are cooperatively connected, and characterized in that: The anti-skid grooves are arranged in a staggered manner along the height direction of the bearing outer ring, and the side length of the anti-skid grooves along the circumferential direction is greater than the side length along the height direction of the bearing outer ring, so as to provide stable and reliable anti-skid performance.

2. The outer ring of a plastic-coated bearing according to claim 1, characterized in that: The anti-skid groove has a low middle portion and high two sides, and the two sides of the anti-skid groove are symmetrical relative to the middle portion.

3. The outer ring of a plastic-coated bearing according to claim 2, characterized in that: The cross-sectional shape of the anti-skid groove is an isosceles triangle / arch, and the shape of the anti-skid protrusion is adapted to the anti-skid groove.

4. The plastic-coated bearing outer ring according to claim 1, characterized in that: The depth D of the anti-slip groove is 1%-3% of the width B of the outer ring of the bearing.

5. The outer ring of a plastic-coated bearing according to claim 1, characterized in that: The length L of the anti-slip groove is 1 / 20-1 / 15 of the circumference C of the bearing outer ring.

6. The plastic-coated bearing outer ring according to claim 1, characterized in that: The upper part, the lower part and the middle part of the bearing outer ring are all provided with anti-skid grooves, and the upper anti-skid groove, the middle anti-skid groove and the lower anti-skid groove are vertically staggered along the height direction of the bearing outer ring.

7. The plastic-coated bearing outer ring according to claim 1, characterized in that: An annular groove is provided on the inner wall edge of the bearing outer ring, and matching parts matching with the annular groove are provided on both sides of the plastic-coated ring. The matching parts are matched and connected with the annular groove to prevent the plastic-coated ring from separating from the bearing outer ring.

8. The plastic-coated bearing outer ring according to claim 7, characterized in that: Limiting parts are arranged at intervals in the annular groove to limit the rotation of the matching part.

9. The plastic-coated bearing outer ring according to claim 1, characterized in that: The plastic-coating ring is made of pps resin.

Images