Spherical ball coating mechanism and spherical ball coating device

Abstract

The utility model provides a spherical ball coating mechanism and a spherical ball coating device, the coating mechanism comprises a rotating part, a guide structure and a tray assembly for placing balls, the tray assembly is provided with a rolling surface for rolling of the balls, the rotating part is movably connected with the tray assembly, and the guide structure is arranged on the rotating part. And the driving mechanism is used for driving the tray assembly to rotate around a first direction, and the tray assembly is guided by the guide structure, so that the tray assembly moves up and down in the first direction. According to the spherical ball coating mechanism and the spherical ball coating device provided by the utility model, the tray assembly can generate swinging motion while rotating, so that the rolling paths, times and directions of the balls in the tray assembly are more random, the movement is more sufficient, the coating layers on the balls are more uniform, and the coating quality of the balls is higher.

Description

Technical Field

[0001] The utility model belongs to the technical field of coating, and more specifically relates to a spherical ball coating mechanism and a spherical ball coating device. Background Art

[0002] Bearings support the rotation of mechanical rotating bodies and are widely used in various industries. The performance and quality of bearings affect the performance and quality of products and equipment. The coating quality of the balls in the bearings has a decisive influence on the performance and quality of the bearings.

[0003] In the medical device industry, the CT tube, a core component of CT scanners, is primarily used to generate X-rays, irradiating various parts of the human body and animals to examine pathological conditions. When the CT scanner is operating, the CT tube operates at high temperature, high vacuum, and high speed. Bearings, as high-speed functional components of the CT tube, require not only excellent lubricity and wear resistance but also electrical conductivity at high speeds. Bearing performance determines the performance and lifespan of the CT tube. To ensure excellent lubricity, wear resistance, and electrical conductivity, coating the bearing balls has become a necessary requirement during bearing manufacturing.

[0004] Ion plating utilizes gas discharge under vacuum conditions to partially ionize the gas or evaporated material. Bombarded by these ions, the evaporated material or its reactants are deposited on a substrate. During the ball coating process, no areas can be missed or uneven in thickness. However, current coating equipment for ball coating produces poor surface uniformity, failing to meet the bearing performance requirements of high-end equipment. Utility Model Content

[0005] The purpose of the embodiments of the present utility model is to provide a spherical ball coating mechanism and a spherical ball coating device to solve the technical problem of poor uniformity in ball coating in the prior art.

[0006] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is: to provide a spherical ball coating mechanism, including a rotating member, a guide structure and a tray assembly for placing the balls, the tray assembly having a rolling surface for the balls to roll; the rotating member is movably connected to the tray assembly to drive the tray assembly to rotate around a first direction; the tray assembly is guided by the guide structure to cause the tray assembly to move up and down in the first direction.

[0007] In the above solution, the spherical ball coating mechanism includes a rotating member, a guiding structure, and a tray assembly. The rotating member drives the tray to rotate in the first direction, and the guiding structure causes the tray to move up and down in the first direction. Therefore, while the tray assembly is rotating, it can generate a swinging motion, making the rolling paths, times, and directions of the balls in the tray assembly more random and the movement more sufficient. As a result, the coating layer on the balls is more uniform and the coating quality of the balls is higher.

[0008] Optionally, the guiding structure includes a base, a connecting frame connected to the tray assembly, and universal wheels provided on the connecting frame. The rotating member is universally connected to the tray assembly. The base has a smooth guiding surface, and the universal wheels abut against the guiding surface.

[0009] In the above solution, by providing a guiding surface on the base, the tray assembly moves up and down in the first direction along with the undulating trend of the guiding surface, thereby realizing the swinging motion of the tray assembly. Therefore, the swinging motion of the tray assembly can be directly controlled by designing and shaping the guiding surface, and the design of the guiding surface is relatively simple.

[0010] Optionally, an elastic member is provided between the tray assembly and the connecting frame.

[0011] In the above solution, the provision of the elastic member can make the connection between the tray assembly and the connecting frame flexible. When the swinging angle of the tray assembly is too large, it can prevent the connecting frame and the guiding structure from getting stuck with each other, and it can also relieve the resistance during rotation, making the movement of the balls more stable.

[0012] Optionally, the guiding surface includes at least one undulating surface circumferentially arranged around the first direction. The undulating surface is undulatingly arranged in the first direction, and the undulating surface includes a smoothly connected descending surface and ascending surface.

[0013] In the above solution, by setting the guiding surface as a combination of one or more undulating surfaces, the tray assembly can swing up and down periodically in the first direction.

[0014] Optionally, the included angle between the connecting line of the head end and the tail end of the descending surface and the horizontal direction is 10 degrees to 30 degrees; or, the height difference between the head end and the tail end of the descending surface is less than or equal to 70 mm and greater than or equal to 5 mm.

[0015] Optionally, the guiding structure includes a guiding rod and a fixedly arranged guiding ring. The plane where the guiding ring is located is arranged at an obtuse angle with the first direction. One end of the guiding rod is fixedly connected to the tray assembly, and the other end of the guiding rod is guided by the guiding ring. An eccentric rod is connected to the rotating member, causing the eccentric rod to rotate deviating from the central axis of the rotating member, and the eccentric rod is movably connected to the tray assembly.

[0016] In the above solution, the rotating member drives the tray assembly to rotate through an eccentric rod, and one end of the guiding rod is guided by a guiding ring arranged obliquely, and the other end is connected to the tray assembly, causing the tray assembly to swing up and down, so that the balls in the tray assembly can roll fully.

[0017] Optionally, the tray assembly includes a support member and a tray body detachably connected to the support member, and the tray body is used for placing the balls.

[0018] In the above solution, by setting the tray assembly as a support member and a tray body detachably connected to the tray body, the tray body can be easily detached from the support member, facilitating the handling of the tray assembly. After placing the balls in the tray assembly elsewhere, it can be placed on the support member. After the ball coating is completed, the tray assembly can be directly removed.

[0019] Optionally, in the direction from the center to the edge of the tray assembly, the height of the rolling surface gradually changes.

[0020] In the above solution, in the direction from the center to the edge of the tray assembly, the height of the rolling surface gradually changes, so that when a large number of balls roll in the tray assembly, the static friction between the balls and the tray assembly and the resistance between the balls will be smaller, which is beneficial to the smoother rolling of the balls in the tray assembly. Specifically, the coating on the balls has a certain viscosity at high temperatures and relatively poor rollability. By changing the height of the rolling surface, the rolling tendency of the balls can be enhanced, and the balls are easier to roll.

[0021] Optionally, a plurality of partitions are circumferentially spaced apart in the tray assembly around the first direction, dividing the tray assembly into a plurality of circumferentially arranged rolling regions.

[0022] In the above solution, compared with a tray of the same size, after partitioning, due to the dispersion of the balls, the resistance between the balls will be reduced, which is more conducive to the rolling of the balls, and thus the coating uniformity will be better. Since it is divided into a plurality of rolling regions, the collision force between the balls and between the balls and the tray assembly will be reduced, reducing the defects caused by collisions. After partitioning, it can be applied to the coating production of batch spherical balls.

[0023] Optionally, in the same rolling region, in the direction from the circumferential two ends to the circumferential middle of the rolling region, the height of the rolling surface gradually decreases.

[0024] In the above solution, by setting a slope undulation in the circumferential direction of the rolling region, the rolling of the balls can be more sufficient, the ball coating can be more uniform, and the quality can be higher.

[0025] Optionally, the included angle between the connection line of the circumferential end part and the circumferential middle part of the rolling area and the horizontal plane is 3 degrees to 10 degrees.

[0026] The present utility model further provides a spherical ball coating device, which includes a plurality of the above-mentioned spherical ball coating mechanisms, and further includes a driving component, and the driving component is used to drive the rotating member to rotate.

[0027] In the above solution, the number of the spherical ball coating mechanisms is multiple, and they can be driven simultaneously by the driving component, improving the efficiency of ball coating. Moreover, the spherical ball coating mechanism includes a rotating member, a guiding structure and a tray assembly. The rotating member drives the tray to rotate around the first direction, and the guiding structure enables the tray to move up and down in the first direction. Therefore, while the tray assembly rotates, it can generate a swinging motion, making the rolling path, number of times and direction of the balls in the tray assembly more random, and the movement more sufficient. Furthermore, the coating layer on the balls is more uniform, and the coating quality of the balls is higher.

[0028] Optionally, the driving component includes a driver, a revolving table connected to the driver, a plurality of first gears fixed on the revolving table, and a second gear meshing with each of the first gears, and each of the first gears is fixedly connected to each of the rotating members correspondingly.

[0029] In the above solution, the revolving table drives the plurality of rotating members to revolve, and the meshing of the first gear and the second gear drives the rotating members to rotate. As a result, while the tray assembly rotates and swings up and down, it revolves with the revolving table, making the movement of the tray assembly more sufficient and the coating quality of the balls higher. Description of the Drawings

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the following-described drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0031] Figure 1 It is a three-dimensional structure diagram of the first spherical ball coating mechanism provided by the embodiment of the present utility model;

[0032] Figure 2 It is a front view of the first spherical ball coating mechanism provided by the embodiment of the present utility model;

[0033] Figure 3 It is a three-dimensional structure diagram of the second spherical ball coating mechanism provided by the embodiment of the present utility model;

[0034] Figure 4The front view of the second spherical ball coating mechanism provided by the embodiment of the present utility model;

[0035] Figure 5 The cross-sectional view of the tray body provided by the embodiment of the present utility model;

[0036] Figure 6 The three-dimensional structure diagram of the spherical ball coating device provided by the embodiment of the present utility model;

[0037] Figure 7 The front view of the spherical ball coating device provided by the embodiment of the present utility model;

[0038] Figure 8 The top view of the spherical ball coating device provided by the embodiment of the present utility model.

[0039] Among them, the reference numerals in the figures:

[0040] 100 - Spherical ball coating mechanism; 10 - Rotating part; 20 - Guide structure; 21 - Base; 211 - Guide surface; 2111 - Descending surface; 2112 - Ascending surface; 22 - Connecting frame; 23 - Universal wheel; 24 - Eccentric rod; 241 - First connecting rod; 242 - Second connecting rod; 25 - Guide ring; 26 - Guide rod; 27 - Bearing; 28 - Counterweight; 30 - Tray assembly; 31 - Tray body; 311 - Partition; 312 - Rolling area; 313 - Rolling surface; 314 - Positioning hole; 32 - Support member; 33 - Positioning column;

[0041] 200 - Revolution table; 300 - Driving assembly; 301 - Second gear; 302 - First gear. Detailed implementation manners

[0042] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0043] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0044] It should be understood that the orientation or positional relationship indicated by terms such as "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is 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. Therefore, it should not be construed as a limitation to the present invention.

[0045] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "a plurality" means two or more unless otherwise specifically defined.

[0046] The present invention provides a spherical ball coating mechanism and device. The spherical ball coating mechanism 100 includes a rotating member 10, a guiding structure 20, and a tray assembly 30. The rotating member 10 drives the tray assembly 30 to rotate, and the guiding structure 20 guides the tray assembly 30 to swing, so that the tray assembly 30 can swing while rotating, making the movement of the balls in the tray assembly 30 more sufficient, the coating layer more uniform, and the coating quality higher.

[0047] Now, the spherical ball coating mechanism 100 provided by the embodiments of the present invention will be described.

[0048] Please refer to Figures 1 to 4 together. The spherical ball coating mechanism 100 includes a rotating member 10, a guiding structure 20, and a tray assembly 30.

[0049] The tray assembly 30 has a receiving cavity for placing balls. The bottom surface of the receiving cavity is a rolling surface 313. When the tray assembly 30 moves, the balls roll on the rolling surface 313. When coating the balls, the more sufficient the movement of the balls, the better the uniformity of the coating layer. When coating the balls in the tray assembly 30, there is no need to clamp the balls with a fixture, and a uniform coating can be formed on all surfaces of the balls, and the coating effect is better.

[0050] The rotating member 10 is movably connected to the tray assembly 30. The rotating member 10 can output rotational motion, driving the tray assembly 30 to rotate about a first direction. Simultaneously, the motion of the tray assembly 30 is guided by the guide structure 20, causing the tray assembly 30 to undulate in the first direction. It can be understood that, with the cooperation of the rotating member 10 and the guide structure 20, the tray assembly 30 simultaneously rotates about the first direction and oscillates back and forth in the first direction, thereby ensuring more complete movement of the balls within the tray assembly 30 and more uniform coating. For example, if the first direction is a vertical direction, the undulating motion of the tray assembly 30 in the first direction can be understood as the two sides of the tray assembly 30 swinging up and down in the vertical direction.

[0051] Specifically, when coating the balls, the spherical ball coating mechanism 100 is placed in a vacuum chamber. Coating the balls in a vacuum environment produces coated balls with a uniform coating, good appearance, and excellent performance. This significantly improves the reliability and lifespan of the ball bearings, and reduces quality risks.

[0052] The spherical ball coating mechanism 100 in the above embodiment includes a rotating part 10, a guide structure 20 and a tray assembly 30. The rotating part 10 drives the tray to rotate around a first direction, and the guide structure 20 causes the tray to move up and down in the first direction. Therefore, the tray assembly 30 can generate a swinging motion while rotating, so that the rolling path, number and direction of the balls in the tray assembly 30 are more random, and the movement is more complete, so that the balls can fully contact the coating material, thereby making the coating layer on the balls more uniform and the coating quality of the balls higher.

[0053] In some embodiments of the present invention, please refer to Figure 2 and Figure 4 The first direction is a vertical direction or a direction close to the vertical direction, the accommodating cavity of the tray assembly 30 opens upward, and when the tray assembly 30 rotates around the vertical direction (or a direction close to the vertical direction) and moves up and down in the vertical direction (or a direction close to the vertical direction), the ball can be retained inside the tray assembly 30, so that the ball can roll inside the tray assembly 30 but will not fall off.

[0054] Among them, the rotation axis of the tray assembly 30 is its central axis, so that the tray assembly 30 can rotate on its own, and the ups and downs of the edge of the tray assembly 30 are relatively smooth, which prevents the balls from falling. It can also make the overall movement path of the tray assembly 30 more symmetrical, and the balls will not easily move to one side.

[0055] In some embodiments of the present invention, the rotating member 10 may be a rotating structure such as a gear or sprocket, which needs to be driven by a driver such as a motor. Alternatively, the rotating member 10 is a motion output end of the driver, which is a part of the driver and can output rotational motion.

[0056] In some embodiments of the present utility model, please refer to Figure 1 and Figure 2 , the guiding structure 20 includes a base 21, a connecting frame 22 connected to the tray assembly 30, and universal wheels 23 disposed on the connecting frame 22. The rotating member 10 is universally connected to the tray assembly 30. The base 21 has a smooth guiding surface 211, and the universal wheels 23 are abutted against the guiding surface 211. The rotating member 10 drives the tray assembly 30 to rotate. When the tray assembly 30 rotates, it drives the universal wheels 23 to move along the guiding surface 211. The guiding surface 211 pushes the connecting frame 22 to move along with the undulation of the guiding surface 211, and further drives the tray assembly 30 to undulate in the first direction through the connecting frame 22.

[0057] By providing the guiding surface 211 on the base 21, the tray assembly 30 undulates in the first direction along with the undulation trend of the guiding surface 211, thereby realizing the rocking motion of the tray assembly 30. Therefore, the rocking motion of the tray assembly 30 can be directly controlled by designing and shaping the guiding surface 211, and the design of the guiding surface 211 is relatively simple.

[0058] In some embodiments, please refer to Figure 2 , the base 21 has a top side and a bottom side disposed opposite to each other. The rotating member 10 can pass through the base 21 from the bottom side of the base 21 to its top side and be connected to the tray assembly 30. The guiding surface 211 is provided on the top side of the base 21. Correspondingly, the universal wheels 23 and the connecting frame 22 are also disposed on the top side of the base 21. In this way, part of the rotating member 10 and the universal wheels 23 are respectively disposed on opposite sides of the base 21, so that the rotating member 10, the universal wheels 23, the connecting frame 22, etc. are easier to layout.

[0059] In some embodiments, please refer to Figure 2 , the base 21 is annular for the rotating member 10 to pass through, and the guiding surface 211 is also annular correspondingly. The rotating member 10 is connected to the center of the tray assembly 30 to drive the tray assembly 30 to rotate.

[0060] In some embodiments, please refer to Figure 2 , one end of the connecting frame 22 is connected to the tray assembly 30, specifically, it can be connected to the bottom of the tray assembly 30. The other end of the connecting frame 22 is connected to the universal wheels 23, so that the universal wheels 23 can rotate universally relative to the connecting frame 22. When the tray assembly 30 rotates, the universal wheels 23 move along the guiding surface 211, and transfer the undulation of the guiding surface 211 in the first direction to the tray assembly 30, causing the tray assembly 30 to swing.

[0061] Optionally, the side of the connecting frame 22 facing the universal wheels 23 is a spherical concave surface, the universal wheels 23 are spherical, and the universal wheels 23 are adapted to the spherical concave surface, so that the universal wheels 23 can rotate universally relative to the connecting frame 22.

[0062] Optionally, the connecting frame 22 and the universal wheel 23 are connected by a cross shaft, which can also enable the universal wheel 23 to rotate universally relative to the connecting frame 22.

[0063] Optionally, a bearing can also be provided on the side of the connecting frame 22 close to the guiding surface 211, and the bearing replaces the universal wheel 23 to transmit the undulating trend of the guiding surface 211.

[0064] In some embodiments, please refer to Figure 1 and Figure 2 , the guiding surface 211 includes at least one undulating surface circumferentially arranged around the first direction. The undulating surface undulates in the first direction and includes a descending surface 2111 and an ascending surface 2112 that are smoothly connected. When there are multiple undulating surfaces, the multiple undulating surfaces are sequentially and smoothly connected end to end and arranged in a circle around the first direction. In one undulating surface, the descending surface 2111 gradually extends along the positive direction of the first direction from its head end to its tail end, and the ascending surface 2112 gradually extends along the reverse direction of the first direction from its head end to its tail end. The tail end of the descending surface 2111 is smoothly connected to the head end of the ascending surface 2112. For example, when the first direction is the vertical direction, the descending surface 2111 of the undulating surface has a tendency to gradually extend downward, and the ascending surface 2112 has a tendency to gradually extend upward, so that the height of the undulating surface continuously changes, enabling the tray assembly 30 to also swing up and down.

[0065] By setting the guiding surface 211 as a combination of one or more undulating surfaces, the tray assembly 30 can swing up and down periodically in the first direction.

[0066] Optionally, the number of undulating surfaces is two, three, etc., and they are sequentially connected end to end around the first direction.

[0067] Optionally, the height difference between the head end and the tail end of the descending surface 2111 is less than or equal to 70 mm and greater than or equal to 5 mm, such as 60 mm, 50 mm, 30 mm, etc. When the height difference between the two ends of the descending surface 2111 is too large, the amplitude of the up and down swing of the tray assembly 30 is likely to be too large, resulting in the balls being easily dropped from the tray assembly 30; when the height difference between the two ends of the descending surface 2111 is too small, the amplitude of the up and down swing of the tray assembly 30 is too small, and the rolling of the balls in the tray assembly 30 may not be sufficient, affecting the coating of the balls. Therefore, the height difference between the head end and the tail end of the descending surface 2111 is set to be less than or equal to 70 mm and greater than or equal to 5 mm.

[0068] Optionally, the angle A between the line connecting the head end and the tail end of the descending surface 2111 and the horizontal direction is 10 degrees to 30 degrees, such as 15 degrees, 18 degrees, 23 degrees, etc. The larger the angle between the line connecting the head end and the tail end of the descending surface 2111 and the horizontal direction, the greater the up-and-down swing amplitude of the tray assembly 30, the more sufficient the movement of the balls, and the easier it is for the balls to fall off the tray assembly 30; the smaller the angle between the line connecting the head end and the tail end of the descending surface 2111 and the horizontal direction, the too small up-and-down swing amplitude of the tray assembly 30, and the rolling of the balls in the tray assembly 30 may not be sufficient, affecting the coating of the balls. Therefore, the angle between the line connecting the head end and the tail end of the descending surface 2111 and the horizontal direction is set to 10 degrees to 30 degrees.

[0069] Optionally, the base 21 is annular, the inner diameter of the base 21 is 100 mm to 140 mm, and the outer diameter is 180 mm to 220 mm.

[0070] Optionally, when the tray assembly 30 is in a horizontal state, the universal wheel 23 abuts against the middle of the descending surface 2111 or the middle of the ascending surface 2112. In this way, the up-and-down swing amplitudes of the tray assembly 30 can be made similar, and the movement trends of the balls in all directions are also similar. Correspondingly, the coating layer on the balls is more uniform.

[0071] In some embodiments of the present invention, there is an elastic member between the tray assembly 30 and the connecting frame 22. One end of the elastic member is connected to the tray assembly 30, and the other end is connected to the connecting frame 22. In this way, a flexible connection can be formed between the tray assembly 30 and the connecting frame 22. When the swing angle of the tray assembly 30 is too large, it can prevent the connecting frame 22 and the tray assembly 30 from jamming with each other, and can also relieve the resistance during rotation, making the movement of the balls more stable.

[0072] Optionally, the elastic member is a deformable structure such as a spring.

[0073] In some embodiments of the present utility model, please refer to Figure 3 and Figure 4, the guiding structure 20 includes a guiding rod 26 and a fixedly arranged guiding ring 25. The plane where the guiding ring 25 is located is arranged at an obtuse angle with respect to the first direction. One end of the guiding rod 26 is fixedly connected to the tray assembly 30, and the other end of the guiding rod 26 is guided by the guiding ring 25. An eccentric rod 24 is connected to the rotating member 10, such that the eccentric rod 24 rotates deviating from the central axis of the rotating member 10, and the eccentric rod 24 is movably connected to the tray assembly 30. The rotating member 10 outputs a rotational motion. The eccentric rod 24 is connected to the rotating member 10 and outputs an eccentric rotational motion. The eccentric rod 24 is movably connected to the tray assembly 30, driving the tray assembly 30 to rotate. Meanwhile, under the action of the obliquely arranged guiding ring 25 and the guiding rod 26 connecting the tray assembly 30 and the guiding ring 25, the tray assembly 30 swings up and down. Therefore, in this embodiment, the tray assembly 30 can also swing up and down while rotating.

[0074] The rotating member 10 drives the tray assembly 30 to rotate through the eccentric rod 24, and one end of the guiding rod 26 is guided by the obliquely arranged guiding ring 25, and the other end is connected to the tray assembly 30, causing the tray assembly 30 to swing up and down, so that the balls in the tray assembly 30 can roll fully.

[0075] In some embodiments, one end of the eccentric rod 24 is connected to a position deviating from the center of the rotating member 10. Therefore, the eccentric rod 24 rotates deviating from the central axis of the rotating member 10. The other end of the eccentric rod 24 is movably connected to the center of the tray assembly 30, and the rotation of the eccentric rod 24 can drive the tray assembly 30 to rotate on its own axis.

[0076] Optionally, the eccentric rod 24 includes a first connecting rod 241 and a second connecting rod 242 connected at an angle to each other. One end of the first connecting rod 241 is eccentrically connected to the rotating member 10, and the other end is connected to the second connecting rod 242. The end of the second connecting rod 242 far from the first connecting rod 241 is movably connected to the tray assembly 30. Through the arrangement of the eccentric rod 24, the eccentric rotational motion output by the rotating member 10 can drive the tray assembly 30 to rotate on its own axis.

[0077] In some embodiments, the rotating member 10 is an eccentric wheel motor and can output an eccentric motion to drive the eccentric rod 24 to rotate eccentrically. Alternatively, the rotating member 10 is a gear, and the eccentric rod 24 is connected to a position deviating from the center of the rotating member 10, driving the eccentric rod 24 to rotate eccentrically.

[0078] In some embodiments, a bearing 27 is disposed between the guide rod 26 and the guide ring 25, such that the guide rod 26 moves under the guiding and restricting action of the guide ring 25. Alternatively, a guide wheel is disposed at one end of the guide rod 26 close to the guide ring 25, and the guide wheel abuts against the guide ring 25, and the movement of the guide rod 26 is guided by the guide ring 25. The guide rod 26 is connected to an eccentric position of the tray assembly 30. In this way, when the tray assembly 30 rotates, the guide wheel slides along the extending direction of the guide ring 25, causing the tray assembly 30 to swing up and down.

[0079] In some embodiments, the eccentric rod 24 is connected to the mandrel of the tray assembly 30 with a clearance or in a universal joint manner.

[0080] In some embodiments of the present utility model, please refer to Figure 3 and Figure 4 , a counterweight 28 is disposed at one end of the guide rod 26 close to the guide ring 25, and the counterweight 28 presses this end of the guide rod 26 against the guide ring 25, such that one end of the guide rod 26 close to the guide ring 25 always remains in contact with the guide ring 25.

[0081] In some embodiments of the present utility model, the guide ring 25 includes two annular guide units which are parallel to each other and spaced apart. One end (structures such as guide wheels) of the guide rod 26 is located between the two guide units, and the two guide units limit the guide wheels and the like. The tray assembly 30 is pushed to swing up and down through the movement of the guide rod 26.

[0082] In some embodiments, please refer to Figure 2 and Figure 4 , the tray assembly 30 includes a support member 32 and a tray body 31 detachably connected to the support member 32. The tray body 31 is used for placing balls. The support member 32 is movably connected to the rotating member 10. When the rotating member 10 rotates, the tray body 31 is driven to rotate through the support member 32. The tray body 31 has the above-mentioned accommodation cavity, and the bottom of the tray body 31 is the above-mentioned rolling surface 313.

[0083] By configuring the tray assembly 30 as the support member 32 and the tray body 31 detachably connected to the tray body 31, the tray body 31 can be easily detached from the support member 32, facilitating the handling of the tray assembly 30. After placing balls in the tray assembly 30 at other places, it can be placed on the support member 32. After the ball coating is completed, the tray assembly 30 can be directly removed.

[0084] In some embodiments, a first positioning portion is disposed on one side of the support member 32 facing the tray body 31, and a second positioning portion is disposed on one side of the tray body 31 facing the support member 32. The first positioning portion and the second positioning portion are inserted into each other, and the insertion direction is the disassembly and assembly direction of the tray body 31.

[0085] Optionally, one of the first positioning portion and the second positioning portion is a positioning hole 314, and the other is a positioning post 33.

[0086] In some embodiments, the support member 32 and the tray body 31 are snap-connected to each other. When it is necessary to disassemble the tray body 31, an external force is directly applied to the tray body 31 to remove it from the support member 32.

[0087] In some embodiments, please refer to Figure 1 and Figure 2 , the edge of the support member 32 is connected to the connecting frame 22, and the center of the support member 32 is movably connected to the rotating member 10.

[0088] In some embodiments, please refer to Figure 3 and Figure 4 , the edge of the support member 32 is connected to the guide rod 26, and the center of the support member 32 is movably connected to the eccentric rod 24.

[0089] In some embodiments of the present utility model, please refer to Figure 5 , in the direction from the center to the edge of the tray assembly 30, the height of the rolling surface 313 gradually changes. Taking the tray assembly 30 placed horizontally as a reference, the height of the rolling surface 313 is the distance between the rolling surface 313 and the ground. The gradual change in the height of the rolling surface 313 can be understood as that the rolling surface 313 is not a flat surface but has a undulating curve.

[0090] The height of the rolling surface 313 gradually changes in the direction from the center to the edge of the tray assembly 30, so that when a large number of balls roll in the tray assembly 30, the static friction between the balls and the tray assembly 30 and the resistance between the balls and the balls will be smaller, which is beneficial to the smoother rolling of the balls in the tray assembly 30. Specifically, the coating on the balls has a certain viscosity at high temperature and relatively poor rollability. By changing the height of the rolling surface 313, the rolling tendency of the balls can be enhanced, and the balls are easier to roll.

[0091] Optionally, in the direction from the center to the edge of the tray assembly 30, the height of the rolling surface 313 gradually decreases, or the height of the rolling surface 313 gradually increases.

[0092] Optionally, in the direction from the center to the edge of the tray assembly 30, the height of the rolling surface 313 gradually decreases and then gradually increases, so that the rolling surface 313 has a concave structure.

[0093] Among them, the height change of the rolling surface 313 will cause the rolling surface 313 to form a slope. The angle and length of the slope are not limited here and can be coordinately set according to the size of the ball, the number of balls, the amplitude when the tray assembly 30 swings, and the performance of the coated layer and coating parameters. Generally speaking, the more the number of balls, the greater the frictional resistance between the balls, and the larger the slope is set, making it easier for the balls to roll. The greater the mass of the balls, the smaller the slope is set, which can reduce the collision between the balls.

[0094] In other embodiments, in the direction from the center to the edge of the tray assembly 30, the height of the rolling surface 313 remains unchanged.

[0095] In some embodiments of the present utility model, please refer to Figure 1 and Figure 3 , a plurality of partitions 311 are circumferentially spaced apart around the first direction in the tray assembly 30, dividing the tray assembly 30 into a plurality of circumferentially arranged rolling areas 312. Each rolling area 312 is independently arranged, and the balls cannot roll from one rolling area 312 to another rolling area 312.

[0096] Compared with the same-sized tray, after zoning, due to the dispersion of the balls, the resistance between the balls and the balls will be reduced, which is more conducive to the rolling of the balls, and further makes the coating uniformity better. Since it is divided into a plurality of rolling areas 312, the collision force between the balls and between the balls and the tray assembly 30 will be reduced, reducing the defects caused by collisions. After zoning, it can be applied to the coating production of batch spherical balls.

[0097] In some embodiments, the rolling area 312 is fan-shaped, and the sizes of the rolling areas 312 are the same, and the same number of balls can be placed in each rolling area 312.

[0098] In some embodiments, the partitions 311 are connected to each other near the center of the tray assembly 30, making the partitions 311 connected as a whole, which is more convenient for the processing and installation of the partitions 311.

[0099] In some embodiments, in the same rolling area 312, in the direction from the circumferential two ends to the circumferential middle of the rolling area 312, the height of the rolling surface 313 gradually decreases. It can be understood that in the same rolling area 312, the circumferential middle of the rolling area 312 is sunken, and the circumferential two ends are higher.

[0100] By setting slope undulations in the circumferential direction of the rolling area 312, the rolling of the balls can be more sufficient, the ball coating is more uniform, and the quality is higher.

[0101] Optionally, the angle between the connecting line of the circumferential end and the circumferential middle of the rolling area 312 and the horizontal plane is B, and the angle B is between 3 degrees and 10 degrees, such as 4 degrees, 6 degrees, 8 degrees, etc. When the angle B is too large, the collision between the balls is relatively intense, and the balls are easily damaged. When the angle B is too small, the viscous resistance between the balls and the tray body 31 is relatively large, and the rolling of the balls may be insufficient. Therefore, the angle B can be set between 3 degrees and 10 degrees.

[0102] In some embodiments of the present invention, the balls are made of magnetic materials, while the tray body 31 is made of non-magnetic materials, such as austenitic stainless steels like 304 and 316, to avoid the generation of magnetic attraction or magnetic repulsion between the balls and the tray body 31 and prevent the balls from sticking together after being magnetized.

[0103] For the preparation of the lubricating coating on the surface of the balls, it is necessary to ensure that the temperature is appropriate during the coating process. Excessive temperature will cause the lubricating layer on the surface of the balls to have a certain viscosity, reducing the free rolling of the balls and ultimately failing to meet the requirements for the uniformity and / or thickness of the coating.

[0104] The present invention also proposes a method Figure 1 and Figure 2 for coating the balls using the embodiments as follows: First, fix the height of the base 21 after determining it. After placing the tray assembly 30 on the support 32, set the motor speed (for example, 15 RPM), turn on the motor to rotate, and check whether the entire device rotates stably with high and low fluctuations. Then place a number of (for example, four) balls (for example, 80 balls) in each area of the tray assembly 30, turn on the rotation again, and check whether the balls can rotate with the tray body 31 and also roll with the high and low swing of the tray body 31 within the tray assembly 30.

[0105] After the above inspections, close the furnace door for operations such as vacuum pumping and heating. When the chamber reaches the set temperature (for example, 300 °C) and the vacuum degree ≤ 3×10-3 Pa, turn on the motor to rotate and start the silver plating operation on the balls. After plating, take out the balls, and randomly take a number of (for example, 20) balls in each area of the tray body 31 to detect the thickness uniformity of the silver film using an X-ray fluorescence spectrometer (XRF). The inspection results are shown in Table 1. It can be seen from this that the thickness uniformity of the balls meets the performance requirements of the lubricating film layer of the ball bearings for medical X-ray tubes, which plays a positive role in reducing noise and extending the service life of the X-ray tubes in CT equipment.

[0106] Table 1

[0107] Zone 1 Zone 2 Zone 3 Zone 4 Overall Standard deviation (μm) 0.009 0.006 0.005 0.005 0.006

[0108] The present invention also proposes a spherical ball coating device. Please refer to Figures 6 to 8, The spherical ball coating device includes a plurality of spherical ball coating mechanisms 100 in any of the above embodiments, and further includes a driving assembly 300. The driving assembly 300 is used to drive the rotating member 10 to rotate. One driving assembly 300 can drive a plurality of rotating members 10 to rotate simultaneously, thereby driving each spherical ball coating mechanism 100 to work, and a plurality of tray assemblies 30 work together, thereby improving the efficiency of ball coating.

[0109] In the spherical ball coating device in the above solution, the number of spherical ball coating mechanisms 100 is multiple, and they can be driven simultaneously by the driving assembly 300 to improve the efficiency of ball coating. Moreover, the spherical ball coating mechanism 100 includes a rotating member 10, a guiding structure 20, and a tray assembly 30. The rotating member 10 drives the tray to rotate in the first direction, and the guiding structure 20 causes the tray to move up and down in the first direction. Therefore, while the tray assembly 30 is rotating, it can generate a swinging motion, making the rolling path, number of times, and direction of the balls in the tray assembly 30 more random and the movement more sufficient. Furthermore, the coating layer on the balls is more uniform and the coating quality of the balls is higher.

[0110] In some embodiments of the present utility model, please refer to Figures 6 to 8 , The driving assembly 300 includes a driver, a revolving table 200 connected to the driver, a plurality of first gears 302 fixed on the revolving table 200, and a second gear 301 meshing with each of the first gears 302. Each first gear 302 is fixedly connected to each rotating member 10 correspondingly. The driver drives the revolving table 200 to rotate through a transmission shaft. Each first gear 302 revolves along the rotation axis of the revolving table 200. When the first gear 302 revolves, it meshes with the second gear 301, and the second gear 301 remains stationary, thereby causing the first gear 302 to rotate self - sufficiently. In this way, the tray assembly 30 of each spherical ball coating mechanism 100 can rotate self - sufficiently and swing. Therefore, in this embodiment, each tray assembly 30 can revolve while rotating self - sufficiently and swinging up and down, making the movement of the tray assembly 30 more sufficient. Among them, the number of the first gears 302 is the same as that of the spherical ball coating mechanisms 100, and the first gears 302 and the rotating members 10 are connected in a one - to - one correspondence.

[0111] The revolving table 200 drives a plurality of rotating members 10 to revolve, and the meshing of the first gear 302 and the second gear 301 drives the rotating member 10 to rotate self - sufficiently, so that the tray assembly 30 revolves with the revolving table 200 while rotating self - sufficiently and swinging up and down, thereby making the movement of the tray assembly 30 more sufficient and the coating quality of the balls higher.

[0112] In some embodiments, the first gear 302 is fixedly connected to the corresponding rotating member 10 through a bearing. The first gear 302 and the rotating member 10 are respectively fixedly connected to opposite sides of the inner ring of the bearing, and the outer ring of the bearing is fixedly connected to the revolving table 200. While realizing the fixed connection between the first gear 302 and the rotating member 10, the rotating member 10 can also rotate relative to the revolving table 200.

[0113] In some embodiments, the pitch diameter of the first gear 302 is smaller than that of the second gear 301. A plurality of first gears 302 are sequentially arranged circumferentially around the central axis of the second gear 301, so that each first gear 302 meshes with the second gear 301.

[0114] In some embodiments, the second gear 301 is an external gear ring. The transmission shaft passes through the second gear 301 and is connected to the revolving table 200, and the second gear 301 remains stationary.

[0115] In some embodiments, the driver can be a motor, such as a fixed-frequency unidirectional motor, a stepless variable-frequency motor, a variable-frequency bidirectional motor, etc.

[0116] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A spherical ball coating mechanism, characterized in that: The invention comprises a rotating member (10), a guide structure (20) and a tray assembly (30) for placing balls, wherein the tray assembly (30) has a rolling surface (313) for the balls to roll; the rotating member (10) is movably connected to the tray assembly (30) to drive the tray assembly (30) to rotate around a first direction; the tray assembly (30) is guided by the guide structure (20) to cause the tray assembly (30) to move up and down in the first direction.

2. The spherical ball coating mechanism according to claim 1, wherein: The guide structure (20) comprises a base (21), a connecting frame (22) connected to the tray assembly (30), and a universal wheel (23) arranged on the connecting frame (22); the rotating member (10) is universally connected to the tray assembly (30); the base (21) has a smooth guide surface (211), and the universal wheel (23) abuts against the guide surface (211).

3. The spherical ball coating mechanism according to claim 2, characterized in that: An elastic member is provided between the tray assembly (30) and the connecting frame (22).

4. The spherical ball coating mechanism according to claim 2, wherein: The guide surface (211) includes at least one undulating surface circumferentially arranged around the first direction, the undulating surface is arranged in an undulating manner in the first direction, and the undulating surface includes a smoothly connected descending surface (2111) and an ascending surface (2112).

5. The spherical ball coating mechanism according to claim 4, characterized in that: The angle between the line connecting the head end and the tail end of the descending surface (2111) and the horizontal direction is 10 degrees to 30 degrees; or, the height difference between the head end and the tail end of the descending surface (2111) is less than or equal to 70 mm and greater than or equal to 5 mm.

6. The spherical ball coating mechanism according to claim 1, characterized in that: The guide structure (20) includes a guide rod (26) and a fixed guide ring (25), wherein the plane where the guide ring (25) is located is set at an obtuse angle to the first direction, one end of the guide rod (26) is fixedly connected to the tray assembly (30), and the other end of the guide rod (26) is guided by the guide ring (25), and an eccentric rod (24) is connected to the rotating member (10) so that the eccentric rod (24) deviates from the central axis of the rotating member (10) and rotates, and the eccentric rod (24) is movably connected to the tray assembly (30).

7. The spherical ball coating mechanism according to any one of claims 1-6, characterized in that: The tray assembly (30) comprises a support member (32) and a tray body (31) detachably connected to the support member (32), wherein the tray body (31) is used for placing the balls.

8. The spherical ball coating mechanism according to any one of claims 1-6, characterized in that: The height of the rolling surface (313) changes gradually from the center to the edge of the tray assembly (30).

9. The spherical ball coating mechanism according to any one of claims 1-6, characterized in that: A plurality of partitions (311) arranged at intervals in the circumferential direction around the first direction are provided in the tray assembly (30), dividing the tray assembly (30) into a plurality of circumferentially arranged rolling areas (312).

10. The spherical ball coating mechanism according to claim 9, characterized in that: In the same rolling area (312), the height of the rolling surface (313) gradually decreases in a direction from the circumferential ends to the circumferential middle of the rolling area (312).

11. The spherical ball coating mechanism according to claim 10, wherein: The angle between the line connecting the circumferential end and the circumferential middle of the rolling area (312) and the horizontal plane is 3 degrees to 10 degrees.

12. A spherical ball coating device, characterized in that: It includes a plurality of spherical ball coating mechanisms (100) as described in any one of claims 1-11, and further includes a driving assembly (300), and the driving assembly (300) is used to drive the rotating member (10) to rotate.

13. The spherical ball coating device according to claim 12, characterized in that: The driving assembly (300) includes a driver, a revolving table (200) connected to the driver, a plurality of first gears (302) fixed on the revolving table (200), and a second gear (301) meshing with each of the first gears (302), and each of the first gears (302) is fixedly connected to each of the rotating members (10).

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