Bearing outer ring for motor shaft with coating plastic displacement prevention structure

Abstract

The utility model relates to a motor shaft bearing outer ring with a plastic coating displacement prevention structure, which comprises an outer ring body, a raceway is arranged in the middle of the inner diameter surface of the outer ring body, and displacement prevention grooves are respectively arranged at two ends of the inner diameter surface of the outer ring body. The cross section of the anti-displacement groove is provided with a first straight edge part, a second straight edge part and a bevel edge part which are in arc transition, the first straight edge part is perpendicular to the axis of the outer ring body, the second straight edge part is parallel to the axis of the outer ring body, and an obtuse angle is formed between the second straight edge part and the bevel edge part; the motor shaft bearing outer ring with the plastic coating displacement prevention structure has the advantages that the structure is reasonable, the processing is convenient, and the connection with the insulating plastic coating layer is reliable.

Description

Technical Field

[0001] The utility model relates to the technical field of plastic-coated bearings, in particular to an outer ring of a bearing for a motor shaft with an anti-plastic-coated displacement structure. Background Art

[0002] Plastic coated bearings are widely used in mechanical equipment and other fields. They are made of non-metallic insulating materials such as nylon and polyoxymethylene, which have a certain hardness and impact resistance, as well as good friction resistance and self-lubrication. The plastic coating layer and the outer ring of the bearing are usually welded by rotation, heat welding or injection molding.

[0003] The plastic-coated deep groove ball bearings in the prior art are usually coated directly on the outer diameter surface of the outer ring of the conventional deep groove ball bearing. Under extreme conditions, the insulating plastic coating layer of the outer ring is prone to circumferential rotation with the outer ring of the bearing, thereby generating heat sources, bearing slippage, creep and other phenomena, ultimately leading to bearing failure and the inability of the gearbox to smoothly transmit power. Utility Model Content

[0004] How to optimize the bearing outer ring structure and improve the reliability of its connection with the plastic coating layer is a difficulty that needs to be solved. At the same time, ensuring the bearing strength and improving the processing convenience also need to be considered. Therefore, based on these problems, the utility model designs a motor shaft bearing outer ring with a reasonable structure, convenient processing, and reliable connection with the insulating plastic coating layer and an anti-plastic coating displacement structure.

[0005] The utility model is realized through the following technical scheme: a motor shaft bearing outer ring with an anti-plastic coating displacement structure comprises an outer ring body, and a raceway is provided in the middle of the inner diameter surface of the outer ring body.

[0006] In order to improve the connection reliability between the outer ring of the bearing and the external plastic coating layer and prevent the plastic coating layer and the outer diameter of the bearing from axial displacement and radial displacement when the bearing is working, anti-displacement grooves are respectively provided at both ends of the inner diameter surface of the outer ring body. The cross section of the anti-displacement groove has a first straight edge portion, a second straight edge portion and a bevel portion which are transitioned to each other through a circular arc. The first straight edge portion is perpendicular to the axis of the outer ring body, the second straight edge portion is parallel to the axis of the outer ring body, and the second straight edge portion and the bevel portion form an obtuse angle.

[0007] In order to further prevent radial displacement between the plastic coating layer and the outer diameter of the bearing during operation, a plurality of anti-displacement straight grooves are provided on one end surface of the outer ring body.

[0008] Preferably, there are four anti-displacement straight grooves and they are evenly arranged along the circumference of the outer ring body.

[0009] In order to improve processing convenience and structural reliability, further, the anti-displacement straight groove is square and opened in the radial direction.

[0010] In order to achieve the best effect of preventing the plastic coating from displacing while ensuring the bearing strength, it is preferred that the depth of the anti-displacement straight groove is 1.7 mm and the width is 4 to 6 mm; the length of the first straight edge is 2.45 mm, the length of the second straight edge is 1.7 mm, and the angle between the second straight edge and the bevel edge is 135°, that is, the depth of the anti-displacement groove is 2.45 mm and the width is 1.7 mm.

[0011] The beneficial effects of the utility model are as follows: the motor shaft bearing outer ring with the anti-plastic coating displacement structure effectively prevents the axial displacement and radial displacement of the plastic coating layer and the bearing outer diameter when the bearing is working by designing anti-displacement grooves at both ends of the inner diameter surface of the bearing outer ring; and effectively prevents the radial displacement of the plastic coating layer and the bearing outer diameter when the bearing is working by designing 4 evenly distributed anti-displacement straight grooves on the end surface of one side of the bearing outer ring, thereby greatly improving the connection reliability between the bearing outer ring and the external plastic coating layer; through continuous experiments and demonstrations, the size and structure of the anti-displacement grooves and the anti-displacement straight grooves are optimized, the strength of the bearing is guaranteed, the processing convenience is improved, and the best effect of preventing the displacement of the plastic coating layer is achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1-2 It is a structural schematic diagram of the outer ring of the motor shaft bearing with an anti-plastic coating displacement structure of the utility model;

[0013] Figure 3 yes Figure 2 A local enlarged schematic diagram of point A;

[0014] In the figure: 1. outer ring body; 11. raceway; 12. anti-displacement groove; 121. first straight edge; 122. second straight edge; 123. oblique edge; 13. anti-displacement straight groove. DETAILED DESCRIPTION

[0015] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present invention.

[0016] like Figure 1-2 The outer ring of a motor shaft bearing with an anti-plastic coating displacement structure shown in the figure comprises an outer ring body 1, a raceway 11 is provided in the middle of the inner diameter surface of the outer ring body, and anti-displacement grooves 12 are provided at both ends of the inner diameter surface of the outer ring body 1. Four anti-displacement straight grooves 13 are evenly distributed along the circumferential direction on one end surface of the outer ring body 1, and the anti-displacement straight grooves 13 are square and are provided along the radial direction.

[0017] like Figure 3As shown, the cross-section of the anti-displacement groove 12 has a first straight edge portion 121, a second straight edge portion 122 and a bevel edge portion 123 which are transitioned to each other through circular arcs, the first straight edge portion 121 is perpendicular to the axis of the outer ring body 1, and the second straight edge portion 122 is parallel to the axis of the outer ring body 1.

[0018] The depth a1 of the anti-displacement straight groove 13 is 1.7 mm, the width b1 is 4-6 mm, the length a2 of the first straight edge 121 of the anti-displacement groove 12 is 2.45 mm, the length b2 of the second straight edge 122 is 1.7 mm, and the angle α formed by the second straight edge 122 and the oblique edge 123 is 135°.

[0019] When the gearbox is working, the plastic-coated bearing rotates at high speed, and the anti-displacement groove 12 can effectively prevent the insulating plastic-coated layer and the outer ring body 1 from axial displacement and radial displacement, and the anti-displacement straight groove 13 can effectively prevent the insulating plastic-coated layer and the outer ring body 1 from radial displacement, thereby effectively preventing the insulating plastic-coated layer and the outer ring body 1 from circumferential rotation, avoiding the generation of heat sources, slipping, creep and other phenomena, thereby ensuring the stable operation of the plastic-coated bearing and ensuring the smooth transmission of power by the gearbox.

[0020] In all examples shown and described herein, any specific values ​​should be interpreted as merely exemplary and not as limiting, and thus other examples of the exemplary embodiments may have different values.

[0021] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0022] In addition, in the description of the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "set", "provided with", etc. should be understood in a broad sense, for example, it 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 it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0023] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship 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 limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0024] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model.

Claims

1. A motor shaft bearing outer ring with an anti-plastic displacement structure, comprising an outer ring body, wherein a raceway is provided in the middle of the inner diameter surface of the outer ring body, and characterized in that: Anti-displacement grooves are respectively provided at both ends of the inner diameter surface of the outer ring body. The cross-section of the anti-displacement groove has a first straight edge portion, a second straight edge portion and a bevel edge portion which are transitioned to each other by circular arcs. The first straight edge portion is perpendicular to the axis of the outer ring body, the second straight edge portion is parallel to the axis of the outer ring body, and the second straight edge portion forms an obtuse angle with the bevel edge portion. A plurality of anti-displacement straight grooves are provided on one end face of the outer ring body.

2. The outer ring of the motor shaft bearing with the anti-plastic displacement structure according to claim 1 is characterized in that: There are four anti-displacement straight grooves which are evenly arranged along the circumference of the outer ring body.

3. The outer ring of the motor shaft bearing with the anti-plastic displacement structure according to claim 2 is characterized in that: The anti-displacement straight groove is square and is opened along the radial direction.

4. The motor shaft bearing outer ring with anti-plastic displacement structure according to claim 3 is characterized in that: The anti-displacement straight groove has a depth of 1.7 mm and a width of 4 to 6 mm.

5. The outer ring of the motor shaft bearing with the anti-plastic displacement structure according to claim 1, characterized in that: The length of the first straight side portion is 2.45 mm, the length of the second straight side portion is 1.7 mm, and the angle formed by the second straight side portion and the oblique side portion is 135°.

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