A local dip coating processing conical retainer and dip coating device

Abstract

The application discloses a conical retainer treated by local dip-molding and a dip-molding device, which comprises a large-end diameter ring, a small-end diameter ring and a plurality of metal supporting columns, the two ends of the supporting columns are fixedly connected with the large-end diameter ring and the small-end diameter ring respectively, the supporting columns are uniformly and interval arranged along the circumferential direction of the retainer, a pocket for mounting a rolling body is formed between the adjacent supporting columns, the supporting column is provided with a contact convex part for contacting the rolling body towards the pocket surface, the contact convex part is covered with a dip-molding material layer, the dip-molding material layer is arranged on the contact convex part for contacting the rolling body, the original characteristics of the metal base material are kept at other positions of the retainer, the dip-molding material layer of the contact convex part makes the surface of the contact convex part smooth, the lubricating effect is good, the contact friction between the contact convex part and the rolling body is reduced, the heat generation is reduced, and the part keeping the original characteristics of the metal base material at other positions helps the retainer to dissipate heat, so that the production cost of enterprises is greatly reduced.

Description

Technical Field

[0001] This application belongs to the field of cages, and particularly relates to a conical cage and a dip-coating device with partial dip coating treatment. Background Technology

[0002] Bearings are crucial components in mechanical equipment, primarily functioning to support rotating bodies and reduce the coefficient of friction during motion. A bearing mainly consists of four parts: an inner ring, an outer ring, rolling elements, and a cage. The cage's primary function is to evenly separate the rolling elements, guiding them along the correct trajectory and effectively preventing friction and wear between them. Due to the performance requirements of the bearing cage, its surface treatment is particularly important. Dip coating, a type of plastic coating process, significantly improves the bearing cage's corrosion resistance, wear resistance, shock absorption, and service life.

[0003] However, the plastic coating on the surface of fully dipped bearing cages may obstruct heat conduction, thus affecting heat dissipation. Especially in high-temperature environments or when lubrication is poor, heat may accumulate on the cage and not easily dissipate, which may cause the cage to burn or break, resulting in the bearing not working properly. Moreover, the dip coating process usually uses thermoplastic powders such as polyethylene (PE) and polypropylene (PP), which are expensive. This will affect the total cost of dip-coated cages, especially for large cages. Therefore, the existing technology needs further improvement. Summary of the Invention

[0004] This invention provides a tapered bearing cage with partial dip coating and a dip coating device to solve the problems of poor heat dissipation and high total production cost of tapered bearing cages with full dip coating.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A partially dip-coated conical cage includes a large-end diameter ring, a small-end diameter ring, and multiple metal support columns. The two ends of the support columns are fixedly connected to the large-end diameter ring and the small-end diameter ring, respectively. The multiple support columns are evenly spaced along the circumference of the cage, and adjacent support columns form pockets for mounting rolling elements. Each support column has a contact protrusion facing the pocket that contacts the rolling element, and the contact protrusion is covered with a dip-coated material layer.

[0007] The tapered bearing cage of the present invention features a partially dip-coated design. A dip-coated material layer is applied to the contact protrusions on the support column facing the pocket surface, where they contact the rolling elements. The other parts of the cage retain the original properties of the metal substrate. The dip-coated material layer on the contact protrusions makes the surface smooth, providing good lubrication and reducing contact friction between the protrusions and the rolling elements, thus reducing heat generation. The parts that retain the original properties of the metal substrate in other locations help dissipate heat from the cage, especially enabling the bearing to quickly cool down after high-speed rotation. By only coating the contact protrusions with the dip-coated material layer, the dip-coating cost is significantly reduced. Compared to a fully dip-coated tapered bearing cage, material costs are reduced by more than 90%, greatly lowering production costs for enterprises.

[0008] In a preferred embodiment, the cross-section of the support column is an isosceles trapezoidal shape, with the short side of the support column located near the inner ring of the bearing and the long side located near the outer ring of the bearing. The support column facing the pocket surface includes a recessed portion located in the middle of the support column to reduce the contact area between the support column facing the pocket surface and the rolling element, and contact protrusions are located at both ends of the recessed portion.

[0009] In a preferred embodiment, an arc-shaped oil passage groove is provided at the junction of the large end diameter ring / small end diameter ring and the support column. One end of the contact protrusion is adjacent to the arc-shaped oil passage groove, and the other end is adjacent to the recessed part, so as to be protruding on the support column body facing the pocket surface.

[0010] In a preferred embodiment, the ring width of the large-diameter ring is greater than the thickness of the support column, forming a first eaves portion facing the inner ring of the bearing; the ring width of the small-diameter ring is greater than the thickness of the support column, forming a second eaves portion facing the inner ring of the bearing.

[0011] A dip-coating apparatus for producing a partially dip-coated conical cage includes a clamping and rotating mechanism and a partial coating mechanism. The clamping and rotating mechanism enables the conical cage to rotate, thereby moving pockets at different positions below the partial coating mechanism. The partial coating mechanism can be raised and lowered to enter the pockets to coat the contact protrusions with a dip-coating material layer.

[0012] In a preferred embodiment, the clamping and rotating mechanism includes a rotating component and a clamping component. The rotating component includes a suspension frame, and the suspension frame is equipped with a lifting lug assembly. The lifting lug assembly includes a lifting lug plate, a lifting lug rod, and a receiving member. The lifting lug plate is disposed on the suspension frame, the lifting lug rod is fixedly connected to the lifting lug plate, and the receiving member is rotatably connected to the lifting lug rod. The first eaves and the second eaves are disposed on the receiving member. The clamping component is capable of clamping the conical retainer and causing it to rotate around the receiving member.

[0013] In a preferred embodiment, the receiving component includes a first injection-molded bearing and a second injection-molded bearing, the diameter of the first injection-molded bearing being smaller than the diameter of the second injection-molded bearing, the first eaves portion contacting the outer surface of the first injection-molded bearing, and the second eaves portion abutting the outer surface of the second injection-molded bearing, so that the injection-molded bearing will not damage the tapered cage.

[0014] In a preferred embodiment, the clamping assembly includes opposing clamping members, each clamping member including a large disc, a small disc, and a frustum connecting the two. The clamping members are able to approach each other so that the outer surface of the conical retainer abuts against the frustum and the large end diameter ring and the small end diameter ring are located between the large disc and the small disc. The clamping members are able to rotate clockwise or counterclockwise simultaneously so that the conical retainer rotates around the receiving member.

[0015] In a preferred embodiment, the local dip coating mechanism includes a lifting mechanism and a coating part. The size of the coating part is smaller than the size of the pocket. The lifting mechanism can drive the coating part to rise and fall into the pocket. The clamping and rotating mechanism drives the conical retainer to rotate so that the contact protrusion contacts the coating part for coating.

[0016] In a preferred embodiment, the coated part includes a coated shell with an isosceles trapezoidal cross-section. The inclined surface of the coated shell is provided with a notch adapted to the shape of a contact protrusion. The contact protrusion can be inserted into the notch. A spray nozzle is provided inside the coated shell, and the spray nozzle sprays the contact protrusion to achieve local dip coating treatment.

[0017] The above structure has the following beneficial effects:

[0018] 1. The conical cage of the present invention with partial dip coating treatment has a dip coating material layer on the contact protrusion where the rolling element is in contact, while other parts of the cage retain the original properties of the metal substrate. The dip coating material layer on the contact protrusion makes the surface of the contact protrusion smooth, has a good lubrication effect, reduces the contact friction between it and the rolling element, and reduces heat generation. The parts of other parts that retain the original properties of the metal substrate help the cage dissipate heat, which greatly reduces the dip coating cost.

[0019] 2. The dip coating device for producing cone cages with partial dip coating of the present invention has a rotating component and a clamping component that can clamp and fix cone cages of various large sizes, realize the mechanical continuous partial coating operation of each pocket of the cone cage, and will not cause clamping damage. It has low cost and stronger operability. Attached Figure Description

[0020] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this invention, illustrate exemplary embodiments of the invention and, together with their description, serve to explain this application and do not constitute an undue limitation of the invention. In the drawings:

[0021] Figure 1A schematic three-dimensional structural diagram of one embodiment of the conical retainer with partial impregnation treatment according to this application is shown;

[0022] Figure 2 This application is illustrated. Figure 1 An enlarged structural schematic diagram of one embodiment of part A in the diagram;

[0023] Figure 3 A schematic three-dimensional structural diagram of one embodiment of the dip coating apparatus of this application is shown;

[0024] Figure 4 It is illustrated Figure 3 An enlarged structural schematic diagram of one embodiment of Part B;

[0025] Figure 5 A schematic three-dimensional structural diagram of one embodiment of the rotating component of this application is shown;

[0026] Figure 6 A schematic three-dimensional structural diagram of one embodiment of the clamping component of this application is shown;

[0027] Figure 7 A schematic diagram illustrating one embodiment of the dip-coating device for partially dip-coating a tapered bearing cage according to this application is shown.

[0028] Figure 8 A schematic diagram illustrating another embodiment of the dip-coating device for partially dip-coating tapered bearing cages of this application is shown.

[0029] Figure 9 The diagram illustrates a schematic embodiment of the fit between the tapered bearing cage and the clamping element of this application.

[0030] Label Explanation:

[0031] 10-Large end diameter ring; 100-First eaves; 11-Small end diameter ring; 101-Second eaves; 12-Support column; 120-Recessed part; 121-Contact protrusion; 122-Arc-shaped oil groove; 13-Dip-coated material layer;

[0032] 21-Rotating assembly; 210-Suspension bracket; 211-Lifting lug assembly; 2110-Lifting lug plate; 2111-Lifting lug rod; 2112-Receiving component; 21121-First injection bearing; 21122-Second injection bearing; 22-Clamping component; 2200-Large plate; 2201-Small plate; 2202-Frustum; 23-Partial coating mechanism; 230-Lifting mechanism; 231-Coated part; 2310-Coated shell; 2311-Notch; 2312-Sprayer head. Detailed Implementation

[0033] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit and scope of the invention. Therefore, the drawings and description are considered to be exemplary in nature and not restrictive.

[0034] The present invention will now be described with reference to the accompanying drawings.

[0035] The specific solution adopted is as follows:

[0036] like Figure 1-2 As shown, the present invention provides a partially dip-coated conical cage, including a large-diameter ring 10, a small-diameter ring 11, and a plurality of metal support columns 12. The two ends of the support columns 12 are fixedly connected to the large-diameter ring 10 and the small-diameter ring 11, respectively. The plurality of support columns 12 are evenly spaced along the circumferential direction of the cage. Adjacent support columns 12 form pockets for mounting rolling elements. The support columns 12 have contact protrusions 121 facing the pockets that contact the rolling elements. The contact protrusions 121 are covered with a dip-coated material layer 13.

[0037] The tapered bearing cage of the present invention features a partially dip-coated design. A dip-coated material layer 13 is applied to the contact protrusion 121 of the support column 12 facing the pocket surface, where it contacts the rolling element. The other parts of the cage retain the original properties of the metal substrate. The dip-coated material layer 13 on the contact protrusion 121 makes the surface of the contact protrusion 121 smooth, providing good lubrication and reducing the contact friction between it and the rolling element, thus reducing heat generation. The parts that retain the original properties of the metal substrate in other locations help dissipate heat from the cage, especially enabling the bearing to quickly cool down after high-speed rotation. By only covering the contact protrusion 121 with the dip-coated material layer 13, the dip-coating cost is significantly reduced. Compared to a fully dip-coated tapered bearing cage, material costs are reduced by more than 90%, greatly lowering production costs for enterprises.

[0038] In a preferred embodiment of this application, the support column 12 has an isosceles trapezoidal cross-section. This isosceles trapezoidal shape increases the overall stability of the cage. By connecting the large-diameter ring 10 and the small-diameter ring 11 of the conical cage, the support column 12 distributes the load, reducing cage deformation and vibration, and ensuring cage stability and safety. The short side of the support column 12 is positioned close to the inner ring of the bearing, and the long side is positioned close to the outer ring of the bearing. A recess 120 is provided in the center of the support column 12 facing the pocket surface. The recess 120 is a sloping structure, which reduces the contact area between the support column 12 and the rolling element facing the pocket surface. The recessed portion 120, located in the middle of the support column 12, has a contact area, and the contact protrusion 121 is provided at both ends of the recessed portion 120. At the same time, an arc-shaped oil groove 122 is provided at the junction of the large end diameter ring 10 / small end diameter ring 11 and the support column 12. One end of the contact protrusion 121 is adjacent to the arc-shaped oil groove 122, and the other end is adjacent to the recessed portion 120. The entire part is convexly set on the support column 12 body facing the pocket surface, so that the rolling element can only contact the contact protrusion 121 during rotation. It can be understood that the arc-shaped oil groove 122 and the recessed portion 120 can enhance the flow of lubricating grease, so as to improve the lubrication and heat dissipation effect of the cage.

[0039] As a second preferred embodiment of this implementation, the ring width of the large-diameter ring 10 is greater than the thickness of the support column 12, forming a first eaves portion 100 facing the inner ring of the bearing; the ring width of the small-diameter ring 11 is greater than the thickness of the support column 12, forming a second eaves portion 101 facing the inner ring of the bearing.

[0040] The first eaves 100 and the second eaves 101 can increase the rigidity and strength of the conical cage, and increase the load-bearing capacity and stability of the cage.

[0041] A dip-coating apparatus for producing cone cages with partial dip coating, see [link to apparatus]. Figure 3-9 It includes a clamping and rotating mechanism and a local coating mechanism. The clamping and rotating mechanism can rotate the conical cage so that the pockets at different positions can be moved to the area below the local coating mechanism 23. The local coating mechanism can be raised and lowered to enter the pocket and coat the contact protrusion 121 with a dip-coated material layer 13.

[0042] For details on the implementation of the clamping and rotating mechanism, please refer to [link / reference]. Figure 3 , Figure 5 as well as Figure 6The clamping and rotating mechanism includes a rotating assembly 21 and a clamping assembly. The rotating assembly 21 includes a suspension frame 210, on which a lifting lug assembly 211 is mounted. The lifting lug assembly 211 includes a lifting lug plate 2110, a lifting lug rod 2111, and a receiving member 2112. The lifting lug plate 2110 is located on the suspension frame, and the lifting lug rod 2111 is fixedly connected to the lifting lug plate 2110. The receiving member 2112 is rotatably connected to the lifting lug rod 2111. The first eaves 100 and the second eaves 101 are located on the receiving member 2112. The clamping assembly can clamp the conical retainer and make it rotate around the receiving member 2112. In the figure, a set of lifting lug assemblies 211 is provided. The relative distance between the two opposing lifting lug assemblies 211 on the suspension frame 210 can be adjusted to support conical retainers of different sizes.

[0043] For details, see Figure 5 The receiving component 2112 includes a first injection-molded bearing 21121 and a second injection-molded bearing 21122. The diameter of the first injection-molded bearing 21121 is smaller than the diameter of the second injection-molded bearing 21122. The first eaves portion 100 contacts the outer surface of the first injection-molded bearing 21121, and the second eaves portion 101 abuts against the outer surface of the second injection-molded bearing 21122, thereby providing more stable support for the tapered cage. The injection-molded bearing will not damage the tapered cage.

[0044] The clamping assembly includes opposing clamping elements 22, see [link / reference] Figure 6 , Figure 7 , Figure 8 as well as Figure 9 The clamping member 22 includes a large disc 2200, a small disc 2201, and a frustum 2202 connecting the two. The clamping members 22 can approach each other so that the outer surface of the conical retainer abuts against the frustum 2202, with the large end diameter ring 10 and the small end diameter ring 11 located between the large disc 2200 and the small disc 2201. The clamping members 22 can rotate clockwise or counterclockwise simultaneously to make the conical retainer rotate around the receiving member 2112. The slope of the frustum 2202 can match the slope of the conical retainer. When the two sides of the conical retainer are respectively embedded between the large disc 2200 and the small disc 2201 of the clamping member, the receiving member 2112 helps to keep the conical retainer stable. The outer side of the frustum 2202 can be covered with a rubber layer to increase friction with the outer surface of the conical retainer, thereby driving its rotation. See [link to relevant documentation]. Figure 8When the two clamping parts 22 rotate clockwise, for example, one clamping part 22 can be rotated actively while the other clamping part 22 rotates passively, and the conical cage will rotate counterclockwise, thereby switching different pocket positions in the local dip coating device. It can be understood that the large plate 2200, the frustum 2202 and the small plate 2201 are detachable, so as to facilitate the replacement of frustum 2202 of different sizes and heights to adapt to conical cages of different sizes. The large plate 2200, the small plate 2201 and the frustum 2202 are connected to the servo motor through the shaft. The servo motor can precisely control the rotation angle, thereby adjusting the pocket position. It is low in cost, more operable, will not damage the cage, and can adapt to the local dip coating operation of conical cages of many sizes.

[0045] For details on the implementation of the local dip coating mechanism, please refer to [link / reference]. Figure 3 and Figure 4 The local dip coating mechanism includes a lifting mechanism 230 and a coating part 231. The size of the coating part 231 is smaller than the size of the pocket. The lifting mechanism 230 can drive the coating part 231 to rise and fall into the pocket. The clamping and rotating mechanism drives the conical retainer to rotate so that the contact protrusion 121 contacts the coating part 231 for coating. Specifically, the coating part 231 includes a coating shell 2310. The cross-section of the coating shell 2310 is an isosceles trapezoid. The inclined surface of the coating shell 2310 is provided with a notch 2311 adapted to the shape of the contact protrusion. The contact protrusion 121 can be inserted into the notch 2311. The coating shell 2310 is provided with a nozzle 2312. The nozzle 2312 sprays the coating towards the contact protrusion 121 to achieve local dip coating treatment.

[0046] The steps for using the specific local dip coating device include: first, hanging the conical retainer to be treated on the receiving part 2112, with one of the pockets facing the bottom of the local dip coating device; bringing the two opposing clamping parts 22 closer together until both ends of the conical retainer are engaged between the large plate 2200 and the small plate 2201, and the inclined side of the conical retainer abuts against the frustum 2202; activating the lifting mechanism 230 to allow the coated part 231 to enter the pocket; rotating the clamping part 22 causes the conical retainer to rotate slightly clockwise until one side of the support column 12 of the pocket contacts the surface. The protrusion 121 enters the notch 2311 of the plastic-coated housing 2310. The spray nozzle 2312 inside the plastic-coated housing 2310 sprays plastic onto the contact protrusion 121. Then, the clamping frame rotates to make the conical retainer rotate counterclockwise so that the contact protrusion 121 of the other side support column 12 enters the notch 2311 on the other side of the plastic-coated housing 2310. Then, the spray nozzle 2312 performs powder coating. After completing the partial powder coating of this pocket, the clamping member 22 rotates to make the pockets in the remaining positions come to this position in sequence, completing the partial plastic coating operation of the entire conical bearing retainer.

[0047] In the description of this invention, it should be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," and "circumferential," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. In this invention, unless otherwise expressly specified and limited, the first feature being "upper" or "lower" than the second feature can mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium.

[0048] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral unit; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. However, specifying a direct connection indicates that the two connected entities do not establish a connection relationship through an intermediate structure, but are simply connected to form a whole through a connecting structure. For those skilled in the art, the specific meaning of the above terms in this invention can be understood according to the specific circumstances.

[0049] In this invention, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature.

[0050] For any parts not mentioned in this invention, existing technologies can be used or referenced.

[0051] The above are merely specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art can easily conceive of various variations or substitutions within the technical scope disclosed in the present invention, and these should all be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A dip-coating device for locally dip-coating a conical cage, characterized in that, The conical cage includes a large end diameter ring, a small end diameter ring, and multiple metal support columns. The two ends of the support columns are fixedly connected to the large end diameter ring and the small end diameter ring, respectively. The multiple support columns are evenly spaced along the circumference of the cage, and the adjacent support columns form pockets for mounting the rolling elements. The support columns have contact protrusions facing the pockets that contact the rolling elements, and the contact protrusions are covered with a layer of dip-coated material. The dip coating device includes a clamping and rotating mechanism and a local coating mechanism. The clamping and rotating mechanism can rotate the conical cage so that the pockets at different positions are moved to the bottom of the local coating mechanism. The local coating mechanism can be raised and lowered to enter the pockets to coat the contact protrusions with a dip coating material layer. The clamping and rotating mechanism includes a rotating component and a clamping component. The rotating component includes a suspension frame, on which a lifting lug assembly is installed. The lifting lug assembly includes a lifting lug plate, a lifting lug rod, and a receiving component. The lifting lug plate is located on the suspension frame, the lifting lug rod is fixedly connected to the lifting lug plate, and the receiving component is rotatably connected to the lifting lug rod. The first eaves and the second eaves are located on the receiving component. The clamping component is capable of clamping the conical retainer and causing it to rotate around the receiving component. The receiving component includes a first injection-molded bearing and a second injection-molded bearing. The diameter of the first injection-molded bearing is smaller than the diameter of the second injection-molded bearing. The first eaves portion contacts the outer surface of the first injection-molded bearing, and the second eaves portion abuts against the outer surface of the second injection-molded bearing. The clamping assembly includes opposing clamping members, each clamping member including a large disc, a small disc, and a frustum connecting the two. The clamping members are able to approach each other so that the outer surface of the conical cage abuts against the frustum and the large end diameter ring and the small end diameter ring are located between the large disc and the small disc. The clamping members are able to rotate simultaneously clockwise or counterclockwise so that the conical cage rotates about the receiving member. The local coating mechanism includes a lifting mechanism and a coating part. The size of the coating part is smaller than the size of the pocket. The lifting mechanism can drive the coating part to rise and fall into the pocket. The clamping and rotating mechanism drives the conical retainer to rotate so that the contact protrusion contacts the coating part for coating.

2. The dip-coating device for locally dip-coating a conical cage according to claim 1, characterized in that, The cross-section of the support column is an isosceles trapezoidal shape. The short side of the support column is located near the inner ring of the bearing, and the long side is located near the outer ring of the bearing. The support column facing the pocket surface includes a recessed portion located in the middle of the support column to reduce the contact area between the support column facing the pocket surface and the rolling element. The contact protrusions are located at both ends of the recessed portion.

3. The dip-coating device for locally dip-coating a conical cage according to claim 2, characterized in that, An arc-shaped oil passage groove is provided at the junction of the large end diameter ring / small end diameter ring and the support column. One end of the contact protrusion is adjacent to the arc-shaped oil passage groove, and the other end is adjacent to the recessed part, which is protruding on the support column body facing the pocket.

4. The dip-coating device for locally dip-coating a conical cage according to claim 2, characterized in that, The ring width of the large-diameter ring is greater than the thickness of the support column, forming a first eaves towards the inner ring of the bearing; the ring width of the small-diameter ring is greater than the thickness of the support column, forming a second eaves towards the inner ring of the bearing.

5. The dip-coating device for a conical cage with partial dip-coating according to claim 1, characterized in that, The coated part includes a coated shell with an isosceles trapezoidal cross-section. The inclined surface of the coated shell is provided with a notch adapted to the shape of a contact protrusion. The contact protrusion can be inserted into the notch. A spray nozzle is provided inside the coated shell, and the spray nozzle sprays the contact protrusion to achieve local dip coating treatment.

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