Antifriction agent coating method and system

Abstract

The invention relates to the technical field of universal joint assembly, in particular to an antifriction agent coating method and system. The method comprises the step of driving the coating brush to move to abut against the coating surface of the universal joint assembly based on completion of positioning of the universal joint assembly. On the basis that the coating brush abuts against the coating face, the end cover is driven to rotate around the center axis of the end cover in the first direction at the first speed and reciprocate in the radial direction of the end cover till the end cover rotates around the center axis of the end cover by a first set angle. The end cover rotates around the central axis of the end cover by a first set angle in a first direction and at a first speed, and the end cover stops moving and rotating. In this way, waste of the antifriction agent is reduced, and meanwhile the antifriction agent is fully applied to the designated surface.

Description

Technical Field

[0001] The invention relates to the technical field of universal joint assembly, and in particular to a friction reducing agent coating method and system. Background Art

[0002] During the operation, the universal joint will move relative to other parts. Large friction will cause the universal joint or other parts to wear more. When the parts of the universal joint are worn, it will affect its transmission accuracy and service life. Therefore, anti-friction agent can be applied to the abutting surface of the universal joint to reduce the friction coefficient, which can effectively reduce energy loss and improve transmission efficiency. Since the friction between the universal joint and other parts generates heat when it is working, if the heat cannot be dissipated in time, the working temperature of the universal joint will increase. The presence of anti-friction agent can reduce frictional heat. Because the anti-friction agent reduces the friction coefficient, the heat generated is reduced when the same torque is transmitted. With the reduction of the friction coefficient, the energy loss of the universal joint will be reduced during the power transmission process. When the transmission efficiency of the universal joint is improved, it means that more power can be effectively transmitted from the input end to the output end. In the drive system of the car, this can improve the power performance of the car and reduce energy waste.

[0003] However, when applying anti-friction agent to the universal joint, a larger soft brush is usually used to apply the anti-friction agent to the surface of the universal joint, which may cause the anti-friction agent to be applied to some parts that do not need to be applied, resulting in waste of anti-friction agent or certain negative effects after application. When a smaller soft brush is used, the robot arm will find it difficult to control the movement accuracy of the soft brush, resulting in uneven application. Summary of the invention

[0004] In order to solve the problem of reducing the waste of friction reducer while allowing the friction reducer to be fully coated on a designated surface, the present invention provides a friction reducer coating method and system.

[0005] In a first aspect, the present invention provides a friction reducer coating method, the friction reducer coating method comprising:

[0006] Step S10, based on the completion of the positioning of the universal joint assembly, drive the coating brush to move to abut against the coating surface of the universal joint assembly; wherein the universal joint assembly includes a shell, an end cover, and a connecting shaft; the shell, the end cover, and the connecting shaft are fixedly connected in sequence along the axial direction of the shell; the diameter of the connecting shaft is smaller than the diameter of the end cover; the coating surface is the part of the end cover away from the side of the shell and spaced from the connecting shaft; L1<L2; wherein L1 is the maximum width of the abutment area between the coating brush and the coating surface; L2 is the size of the coating surface along the radius direction of the end cover;

[0007] Step S20, based on the abutment between the coating brush and the coating surface, driving the end cover to rotate around the central axis of the end cover in a first direction and at a first speed and to reciprocate along the radial direction of the end cover until the end cover rotates around the central axis of the end cover by a first set angle; wherein when the end cover moves along the radial direction of the end cover, the coating brush reciprocates relative to the coating surface in a first area and a second area on one side of the central axis of the end cover; the coating surface includes a first area and a second area; the inner circumference of the second area is connected to the outer circumference of the first area;

[0008] Step S30: based on the end cover rotating about the central axis of the end cover by the first set angle in the first direction and at the first speed, the end cover stops moving and rotating.

[0009] In some embodiments, step S20 includes:

[0010] Step S21, based on the coating brush abutting against the first range of the second area, driving the end cover to rotate around the central axis of the end cover to a second set angle in the first direction and at the first speed; wherein when the end cover moves along the radial direction of the end cover, the coating brush reciprocates relative to the coating surface in the first area and the second area on one side of the central axis of the end cover; the second area includes the first area and the second area; the inner circumference of the first area is connected to the outer circumference of the first area; the inner circumference of the second area is connected to the outer circumference of the first area;

[0011] Step S22, based on the end cover rotating around the central axis of the end cover to the second set angle in the first direction and at the first speed, driving the end cover to reciprocate along the radial direction of the end cover;

[0012] Step S23: based on the reciprocating movement of the end cover along the radial direction of the end cover, the end cover rotates from the second set angle to the first set angle in the first direction and at the first speed.

[0013] In some embodiments, step S21 includes:

[0014] Step S211, based on the coating brush abutting against the first range, driving the end cap to move close to one end of the coating brush to a first set height;

[0015] Step S212: based on the end cap moving close to one end of the coating brush to the first set height, the end cap is driven to rotate around the central axis of the end cap to a second set angle in the first direction and at the first speed.

[0016] In some embodiments, step S23 includes:

[0017] Step S231, based on the reciprocating movement of the end cover along the radial direction of the end cover, the end cover rotates to the second set angle in the first direction and at the first speed;

[0018] Step S232, based on the end cover rotating to the second set angle in the first direction and at the first speed, driving the end cover to rotate from the second set angle to the first set angle in the first direction and at the second speed; wherein the second speed is less than the first speed.

[0019] In some embodiments, step S232 includes:

[0020] Step S2321, based on the end cover rotating to the second set angle in the first direction and at the first speed, driving the end cover to rotate from the second set angle to a third set angle in the first direction and at the second speed;

[0021] Step S2322, based on the end cover rotating from the third set angle to the third set angle in the first direction and at the second speed, the end cover moves close to one end of the coating brush to a second set height;

[0022] Step S2323: based on the end cap moving close to one end of the coating brush to the second set height, the end cap rotates from the third set angle to the first set angle in the first direction and at the second speed.

[0023] In some embodiments, the step S2323 further includes:

[0024] Step S23231, based on the end cap moving close to one end of the coating brush to the second set height, the end cap rotates from the third set angle to a fourth set angle in the first direction and at the second speed;

[0025] Step S23232, based on the end cap rotating from the third set angle to the fourth set angle in the first direction and at the second speed, driving the end cap to move close to one end of the coating brush to a third set height;

[0026] Step S23233: based on the end cap moving close to one end of the coating brush to the third set height, the end cap rotates from the fourth set angle to the first set angle in the first direction and at the first speed.

[0027] In some embodiments, V1>V2; wherein V1 is the rotation speed of the end cap when the coating brush abuts against the set area for the first time; V2 is the rotation speed of the end cap when the coating brush abuts against the set area for the second time and thereafter; the set area is the area covered by the coating surface when the coating brush abuts against the first range until the end cap rotates in the first direction around the central axis of the end cap to the second set angle.

[0028] In some embodiments, step S30 further includes:

[0029] Step S30: based on the end cover rotating about the central axis of the end cover by the first set angle in the first direction and at the first speed, the end cover rotates about the central axis of the end cover by a fifth set angle in a second direction.

[0030] In a second aspect, the present invention provides a friction reducer coating system, the friction reducer coating system is applied to any of the friction reducer coating methods in the first aspect, the friction reducer coating system comprising:

[0031] A universal joint assembly, the universal joint assembly comprising a shell, an end cover, and a connecting shaft; the shell, the end cover, and the connecting shaft are fixedly connected in sequence along the axial direction of the shell; the diameter of the connecting shaft is smaller than the diameter of the end cover; the coating surface is the portion of the end cover that is away from one side of the shell and spaced from the connecting shaft; L1<L2; wherein L1 is the maximum width of the contact area between the coating brush and the coating surface along the axial direction of the universal joint assembly; L2 is the radial dimension of the coating surface;

[0032] A coating assembly, the coating assembly comprising a base unit and a coating unit; the base unit comprising a base and a motion module; the motion module comprising a positioning platform, a rotating part, and a moving part; the moving part is movably connected to the base; the rotating part is detachably connected to an end of the moving part away from the base; the end of the rotating part away from the moving part is detachably connected to the positioning platform; the coating unit comprises a coating brush, a mechanical arm, and a storage part; the mechanical arm is detachably connected to the coating brush; the internal space of the storage part stores a friction reducer;

[0033] The friction reducing agent coating system includes a coating state; the coating state includes the shell being detachably connected to the positioning platform at one end away from the base; the moving part drives the end cover to move radially along the end cover; the rotating part drives the end cover to rotate around the central axis of the end cover; the robotic arm drives the coating brush to move until it abuts against the coating surface.

[0034] In some embodiments, the motion module further comprises a lifting portion; the moving portion is detachably connected to the rotating portion via the lifting portion;

[0035] The coating state also includes the lifting portion driving the end cover to move toward or away from the base.

[0036] In order to solve the problem of reducing the waste of friction reducer while allowing the friction reducer to be fully coated on the specified surface, the present invention has the following advantages:

[0037] When the coating brush contacts the coating surface, the rotating part drives the end cover to rotate around the central axis of the end cover in a first direction and at a first speed, and the moving part drives the end cover to reciprocate along the radial direction of the end cover until the end cover rotates around the central axis of the end cover by a first set angle. The reciprocating motion can fully coat the antifriction agent on the coating brush to the coating surface, so that the antifriction agent on the coating surface is sufficient and uniform, so that the coating of the antifriction agent is completed by using a coating brush with a smaller contact area with the coating surface. In this way, the loss of the antifriction agent can be reduced, and the position of the universal joint assembly can be limited by the positioning table. The rotating part drives the rotation of the universal joint assembly, and the moving part drives the end cover to reciprocate, so that the antifriction agent is fully and evenly coated on the coating surface. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 A flow chart showing a friction reducing agent coating method according to an embodiment;

[0039] Figure 2 A schematic diagram of a friction reducing agent coating system according to an embodiment is shown;

[0040] Figure 3 A schematic diagram of a universal joint assembly according to an embodiment is shown;

[0041] Figure 4 A schematic diagram of a coating assembly according to an embodiment is shown.

[0042] Figure markings: universal joint assembly 01; housing 11; end cover 12; connecting shaft 13; coating assembly 02; base unit 21; base 211; motion module 212; positioning platform 2121; rotating part 2122; moving part 2123; lifting part 2124; coating unit 22; coating brush 221; robotic arm 222; grabbing part 223; storage part 224. DETAILED DESCRIPTION

[0043] The present disclosure will now be discussed with reference to several exemplary embodiments. It should be understood that these embodiments are discussed only to enable those skilled in the art to better understand and thus implement the present disclosure, rather than implying any limitation on the scope of the present disclosure.

[0044] As used herein, the term "including" and its variants are to be interpreted as open-ended terms meaning "including but not limited to". The term "based on" is to be interpreted as "based at least in part on". The terms "one embodiment" and "an embodiment" are to be interpreted as "at least one embodiment". The term "another embodiment" is to be interpreted as "at least one other embodiment". The orientation or position relationship indicated by the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "vertical", "horizontal", "lateral", "longitudinal" and the like is based on the orientation or position relationship shown in the accompanying drawings. These terms are mainly for better describing the present application and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation. In addition, in addition to being used to indicate an orientation or position relationship, some of the above terms may also be used to indicate other meanings, such as the term "upper" may also be used to indicate a certain dependency or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in this application can be understood according to the specific circumstances. In addition, the terms "install", "set", "provided with", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be an internal connection between two devices, elements or components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to the specific circumstances. In addition, the terms "first", "second", etc. are mainly used to distinguish different devices, elements or components (the specific types and structures may be the same or different), and are not used to indicate or imply the relative importance and quantity of the indicated devices, elements or components. Unless otherwise specified, "plurality" means two or more.

[0045] In this embodiment, the universal joint will have relative motion with other parts during operation. Large friction will cause aggravated wear of the universal joint or other parts. Therefore, the friction surface of the universal joint needs to be coated with a friction reducer to increase its service life. However, when applying a friction reducer to the universal joint, a larger soft brush is usually used to apply it to the surface of the universal joint, which may cause the friction reducer to be applied to some parts that do not need to be applied, thereby resulting in a waste of the friction reducer or certain negative effects after application. When a smaller soft brush is used, it will be difficult for the robot arm to control the movement accuracy of the soft brush, resulting in uneven application. Therefore, in order to solve the above problems, the present invention provides a method for applying a friction reducer.

[0046] The antifriction agent coating system can be applied to the antifriction agent coating method. Figure 2 As shown, the friction reducing agent coating system may include a universal joint assembly 01 and a coating assembly 02 .

[0047] like Figure 4 As shown, the coating assembly 02 may include a base unit 21 and a coating unit 22. The base unit 21 may include a base 211 and a motion module 212. The motion module 212 may include a positioning platform 2121, a rotating portion 2122, and a moving portion 2123. The moving portion 2123 may be movably connected to the base 211. The rotating portion 2122 may be detachably connected to an end of the moving portion 2123 away from the base 211. The end of the rotating portion 2122 away from the moving portion 2123 may be detachably connected to the positioning platform 2121. The coating unit 22 may include a coating brush 221, a mechanical arm 222, and a friction reducer. The internal space of the storage portion 224 may store the friction reducer. The mechanical arm 222 may be detachably connected to the coating brush 221. The internal space of the storage portion 224 may store the friction reducer.

[0048] like Figure 1 As shown, the friction reducing agent coating method may include steps S10 to S30, and steps S10 to S30 may be described in detail below.

[0049] Step S10, based on the completion of positioning of the universal joint assembly 01, the completion of positioning may include the detachable connection between the lower end surface of the universal joint assembly 01 and the upper end surface of the positioning portion, and the mechanical arm 222 may drive the coating brush 221 to absorb the antifriction agent in the storage portion 224. Then the mechanical arm 222 may drive the coating brush 221 that is fully adsorbed with the antifriction agent to move to abut against the coating surface of the universal joint assembly 01, so that the antifriction agent on the coating brush 221 adheres to the coating surface. Figure 3As shown, the universal joint assembly 01 may include a housing 11, an end cover 12, and a connecting shaft 13. The housing 11, the end cover 12, and the connecting shaft 13 may be fixedly connected in sequence along the axial direction of the housing 11. The diameter of the connecting shaft 13 may be smaller than the diameter of the end cover 12. The coating surface may be a portion of the end cover 12 that is away from one side of the housing 11 and spaced from the connecting shaft 13. When the connecting shaft 13 is connected to other components, the coating surface may be used to abut against the other components, thereby limiting and supporting the other components. L1<L2. Among them, L1 may be the maximum width of the abutment area between the coating brush 221 and the coating surface. L2 may be the dimension of the coating surface along the radial direction of the end cover 12. In order to reduce the consumption of antifriction agent, a soft brush with a smaller maximum width of the contact area between the coating brush 221 and the coating surface is used. In this way, when applying the antifriction agent, the coating brush 221 will not apply the antifriction agent to the outer peripheral surface of the universal joint assembly 01 that does not need to be applied, thereby reducing the cost of antifriction agent application and avoiding the antifriction agent from being applied to the outer peripheral surface of the universal joint assembly 01 other than the coating surface, thereby causing a negative impact on the universal joint assembly 01. For example, the seal of the transmission shaft is usually made of materials such as rubber, and its function is to prevent lubricating oil leakage and foreign impurities from entering. When the antifriction agent is applied to the seal of the transmission shaft, its components are incompatible with the seal material, which may cause the seal to age, soften or harden.

[0050] Step S20, based on the contact between the coating brush 221 and the coating surface, the rotating part 2122 can drive the positioning part to rotate, the positioning part drives the shell 11 to rotate, and the end cover 12 rotates with the shell 11, so that the rotating part 2122 drives the end cover 12 to rotate around the central axis of the end cover 12 in the first direction and the first speed, and the moving part 2123 drives the end cover 12 to reciprocate along the radial direction of the end cover 12 until the end cover 12 rotates around the central axis of the end cover 12 by a first set angle. The first direction can be clockwise or counterclockwise. The reciprocating motion can make the friction reducer on the coating brush 221 fully coated on the coating surface, so that the friction reducer on the coating surface is sufficient and uniform. Among them, when the end cover 12 moves along the radial direction of the end cover 12, the coating brush 221 reciprocates in the first area and the second area on one side of the central axis of the end cover 12 relative to the coating surface. The coating surface may include a first area and a second area. The inner peripheral side of the second area may be connected to the outer peripheral side of the first area. Since the robot arm 222 needs to drive the coating brush 221 to dip the antifriction agent and drive the gripping part 223 to grip the movement of the universal joint assembly 01, the movement amplitude is usually large, resulting in the robot arm 222 not being accurate enough when moving a small amplitude. If the robot arm 222 is used to drive the coating brush 221 to move back and forth in the first area and the second area on the side of the central axis of the end cover 12 relative to the coating surface, the robot arm 222 will need to control the coating brush 221 to stop and turn multiple times. Each emergency stop and turn will have a certain error. After the errors of multiple emergency stops and turns are accumulated, the antifriction agent coating cannot be completed. Since the robot arm 222 is a cantilever, the force arm from the base 211 of the robot arm 222 to the coating brush 221 is long, making it difficult for the robot arm 222 to drive the coating brush 221 to reciprocate. If additional equipment is added to the end of the robot arm 222 away from the base 211 to allow the coating brush 221 to reciprocate, the structure of the robot arm 222 needs to be strengthened, which will result in a high coating cost for the antifriction agent. Therefore, the robot arm 222 only needs to drive the coating brush 221 to abut and fix with the coating surface, and then make the end cover 12 rotate around the central axis of the end cover 12 in the first direction and the first speed and reciprocate along the radial direction of the end cover 12 until the end cover 12 rotates around the central axis of the end cover 12 by the first set angle, so as to reduce the loss of the antifriction agent, and at the same time, the position of the universal joint assembly 01 is limited by the positioning table 2121, the rotating part 2122 drives the rotation of the universal joint assembly 01, and the moving part 2123 drives the end cover 12 to reciprocate, so as to accurately complete the application of the antifriction agent. Because the base unit 21 is relatively light and the control is relatively simple, the end cover 12 is controlled to reciprocate along the radial direction of the end cover 12, thereby reducing the cost of antifriction agent coating.

[0051] Step S30: Based on the end cap 12 rotating around the central axis of the end cap 12 at a first direction and a first speed by a first set angle, it can be determined that the friction reducer has been evenly and sufficiently applied to the coating surface, and the end cap 12 stops moving and rotating. The first set angle can be 1800°. This method can reduce the waste of the friction reducer and also allow the friction reducer to be fully applied to the coating surface, thereby completing the coating of the friction reducer.

[0052] In this embodiment, step S20 of the friction reducing agent coating method may include steps S21 to S23, and steps S21 to S23 may be described in detail below.

[0053] Step S21, based on the coating brush 221 abutting against the first range of the second area, the rotating part 2122 can drive the end cap 12 to rotate around the central axis of the end cap 12 to a second set angle in the first direction and at a first speed, and the second set angle can be less than 180°. Because the coating brush 221 has just dipped into the anti-friction agent, the anti-friction agent on the coating brush 221 is sufficient, so after the coating brush 221 abuts against the first range of the second area, the rotating part 2122 drives the end cap 12 to rotate around the central axis of the end cap 12 to the second set angle in the first direction and at the first speed. From the abutment of the coating brush 221 with the coating surface to the rotation of the end cap 12 around the central axis of the end cap 12 to the second set angle, this method can make the movement track of the coating brush 221 on the coating surface shorter, avoid excessive anti-friction agent adhering to the coating surface of the end cap 12 rotating to the second set angle at the central axis, and allow sufficient anti-friction agent to be reserved on the coating brush 221 to pave the subsequent coating surface, so that the anti-friction agent is evenly coated. Thereby, it is avoided that the coating brush 221 applies too much antifriction agent in the first range, resulting in insufficient antifriction agent on the subsequent coating brush 221, and the coating surface cannot be evenly coated. Among them, when the end cover 12 moves along the radial direction of the end cover 12, the coating brush 221 reciprocates in the first area and the second area on the side of the central axis of the end cover 12 relative to the coating surface. The second area may include the first area and the second area. The inner circumference of the first area is connected to the outer circumference of the first area. The inner circumference of the second area is connected to the outer circumference of the first area. Since the centrifugal force of rotation will not cause the antifriction agent to move a large amount, and the antifriction agent has poor fluidity, the antifriction agent is coated in the first range, so as to facilitate the uniform coating of the antifriction agent on the coating surface.

[0054] Step S22, based on the rotating part 2122 driving the end cover 12 to rotate around the central axis of the end cover 12 to a second set angle in a first direction and at a first speed, and then in the subsequent coating process, the end cover 12 can be driven to reciprocate radially along the end cover 12, so that when the anti-friction agent on the coating brush 221 is relatively sufficient, the rotating part 2122 drives the end cover 12 to rotate around the central axis of the end cover 12 to the second set angle in the first direction and at a first speed. As the anti-friction agent on the coating brush 221 gradually decreases, the end cover 12 is driven to reciprocate radially along the end cover 12 to increase the motion trajectory of the anti-friction agent applied to the coating surface.

[0055] Step S23, based on the radial reciprocating movement of the end cover 12, the end cover 12 rotates from the second set angle to the first set angle in the first direction and at the first speed. In this way, the coating brush 221 coats the antifriction agent in the first range, and when the coating brush 221 moves to the position where the antifriction agent has been applied, the antifriction agent can be evenly applied to the first area and the second area through the radial reciprocating movement of the end cover 12, thereby completing the coating of the antifriction agent.

[0056] In this embodiment, step S21 of the friction reducing agent coating method may include step S211 and step S212. Step S211 and step S212 may be described in detail below.

[0057] The motion module 212 may further include a lifting portion 2124. The moving portion 2123 may be detachably connected to the rotating portion 2122 via the lifting portion 2124. The coating state may further include the lifting portion 2124 driving the end cover 12 to move closer to the base 211 or away from the base 211.

[0058] Step S211, based on the contact between the coating brush 221 and the first range, the lifting part 2124 can drive the end cover 12 to move to the first set height close to one end of the coating brush 221. Since the coating brush 221 is a soft brush, the smaller the distance between the coating surface and the base 211, the looser the contact between the coating surface and the coating brush 221, that is, the area where the coating brush 221 contacts the first range is small, which can prevent the friction reducing agent on the coating brush 221 from being excessively applied to the coating area of ​​the coating surface at the second set angle.

[0059] Step S212, based on the end of the end cap 12 moving to the first set height close to the coating brush 221, the end cap 12 is driven to rotate around the central axis of the end cap 12 to the second set angle in the first direction and at the first speed. This is because the coating brush 221 has just absorbed a relatively sufficient amount of antifriction agent from the storage unit 224, so the area where the coating brush 221 abuts against the first range is reduced, so as to avoid the coating area of ​​the coating surface where the end cap 12 rotates around the central axis of the end cap 12 to the second set angle in the first direction and at the first speed, and excessive antifriction agent is avoided, resulting in uneven coating, and sufficient antifriction agent can be reserved for the coating surface that is not coated with antifriction agent in the future.

[0060] In this embodiment, step S23 of the friction reducing agent coating method may include step S231 and step S232. Step S231 and step S232 may be described in detail below.

[0061] In step S231 , based on the moving part 2123 driving the end cover 12 to reciprocate along the radial direction of the end cover 12 , the rotating part 2122 then drives the end cover 12 to rotate to a second set angle in a first direction and at a first speed.

[0062] Step S232, based on the end cover 12 rotating to the second setting angle in the first direction and the first speed, drive the end cover 12 to rotate from the second setting angle to the first setting angle in the first direction and the second speed. Among them, the second speed is less than the first speed. In this way, one end of the coating brush 221 abuts against the coating surface, and the end cover 12 rotates from the second setting angle to the first setting angle in the first direction and the second speed. The slower second speed can make the movement track of the coating brush 221 on the coating surface wider, and at the same time, the friction reducer on the coating brush 221 has more time to flow to the coating surface. Thereby, the friction reducer can be applied to the coating surface more evenly.

[0063] In this embodiment, step S232 of the friction reducing agent coating method may include steps S2321 to S2323, and steps S2321 to S2323 may be described in detail below.

[0064] Step S2321: Based on the end cover 12 rotating to the second setting angle in the first direction and at the first speed, the rotating part 2122 can drive the end cover 12 to rotate from the second setting angle to the third setting angle in the first direction and at the second speed. The sum of the third setting angle and the second setting angle is equal to the first setting angle.

[0065] Step S2322, based on the end cap 12 rotating from the third set angle to the third set angle in the first direction and the second speed, the friction reducer on the coating brush 221 is further reduced, and the fluidity of the friction reducer is poor, and the friction reducer on the upper part of the coating brush 221 is difficult to slide down to the part where the coating brush 221 abuts against the coating surface, and it is difficult to adhere to the coating surface, so the end cap 12 can be moved to the second set height close to one end of the coating brush 221. Since the coating brush 221 is a soft brush, the larger the distance between the coating surface and the base 211, the tighter the abutment between the coating surface and the coating brush 221, and the tight abutment causes the coating brush 221 to deform, and the deformation of the coating brush 221 makes the abutment area between the coating brush 221 and the coating surface larger. In this way, the abutment area between the coating brush 221 and the coating surface is increased, so that the friction reducer on the upper part of the coating brush 221 is fully in contact with the coating surface, and the friction reducer on the coating brush 221 is used as much as possible on the coating surface.

[0066] Step S2323, based on the end of the end cap 12 moving to the second set height close to the coating brush 221, the end cap 12 rotates from the third set angle to the first set angle in the first direction and at the second speed, so as to apply the antifriction agent on the coating brush 221 to the coating surface as much as possible, and complete the antifriction agent coating of the universal joint assembly 01.

[0067] In this embodiment, step S2323 of the friction reducing agent coating method may include steps S23231 to S23233, and steps S23231 to S23233 may be described in detail below.

[0068] In step S23231, based on the end of the end cap 12 moving to the second set height close to the coating brush 221, the rotating part 2122 can drive the end cap 12 to rotate from the third set angle to the fourth set angle in the first direction and at the second speed.

[0069] Step S23232, based on the end cap 12 rotating from the third setting angle to the fourth setting angle in the first direction and the second speed, the end cap 12 is driven to move to the third setting height near one end of the coating brush 221. The third setting height can be between the first setting height and the second setting height. Since the coating brush 221 is a soft brush, the larger the distance between the coating surface and the base 211, the tighter the abutment between the coating surface and the coating brush 221, and the larger the abutment area between the coating brush 221 and the coating surface. On the contrary, the smaller the distance between the coating surface and the base 211, the looser the abutment between the coating surface and the coating brush 221, and the smaller the abutment area between the coating brush 221 and the coating surface. At this time, most of the antifriction agent on the coating brush 221 has been applied to the coating surface. In order to avoid the antifriction agent on the coating surface being adsorbed by the coating brush 221 again, the abutment area between the coating brush 221 and the coating surface is reduced. However, the abutment area between the coating brush 221 and the coating surface cannot be too small, otherwise it will cause the antifriction agent on the coating surface to be applied unevenly. Therefore, the end cover 12 close to the coating brush 221 is driven to move to the third set height, so that the contact area between the coating brush 221 and the coating surface is moderate, and the friction reducing agent on the coating surface is evenly applied.

[0070] Step S23233, based on the end cap 12 moving to the third set height close to one end of the coating brush 221, the end cap 12 rotates from the fourth set angle to the first set angle at the first direction and the first speed. The fourth set angle can be judged as the friction reducing agent on the coating brush 221 is less, and the rotating part 2122 can drive the end cap 12 to rotate from the fourth set angle to the first set angle at the first direction and the first speed, so that the coating efficiency of the coating brush 221 can be improved at a faster first speed.

[0071] In this embodiment, V1>V2. V1 is the rotation speed of the end cap 12 when the coating brush 221 abuts against the set area for the first time. V2 is the rotation speed of the end cap 12 when the coating brush 221 abuts against the set area for the second time and thereafter. The set area is the area covered by the coating surface when the coating brush 221 abuts against the first range until the end cap 12 rotates around the central axis of the end cap 12 in the first direction to the second set angle. Since the coating brush 221 applies more antifriction agent to the coating surface when the coating brush 221 abuts against the set area for the first time, when the coating brush 221 abuts against the set area for the second time and thereafter, the rotation speed of the end cap 12 is slowed down, so that the coating brush 221 can absorb more antifriction agent on the coating surface to the coating brush 221, and then apply it to the coating surface with less antifriction agent, so that the antifriction agent is applied more evenly.

[0072] In this embodiment, step S30 of the friction reducing agent coating method may also include rotating the end cap 12 in the second direction along the central axis of the end cap 12 by a fifth setting angle based on the end cap 12 rotating in the first direction and at the first speed around the central axis of the end cap 12 by a first setting angle. When the first direction is clockwise, the second direction is counterclockwise. When the first direction is counterclockwise, the second direction is clockwise. When the end cap 12 rotates in the first direction and at the first speed around the central axis of the end cap 12 by the first setting angle, since the coating brush 221 is a soft brush and the fluidity of the friction reducing agent is poor, the soft bristle part of the coating brush 221 deforms along the first direction as the end cap 12 rotates, so that the friction reducing agent on the side of the coating brush 221 abutting against the coating surface is fully coated on the coating surface. By rotating the end cap 12 in the second direction along the central axis of the end cap 12 by the fifth setting angle, the friction reducing agent on the side of the coating brush 221 abutting against the coating surface when the end cap 12 rotates in the second direction is fully coated on the coating surface, so that the friction reducing agent on the coating brush 221 is fully applied to the coating surface.

[0073] In this embodiment, if Figure 2 As shown, the present invention provides a friction reducing agent coating system, which can be applied to any of the above embodiments. The friction reducing agent coating system can include a universal joint assembly 01 and a coating assembly 02.

[0074] like Figure 3As shown, the universal joint assembly 01 may include a housing 11, an end cover 12, and a connecting shaft 13. The housing 11, the end cover 12, and the connecting shaft 13 may be fixedly connected in sequence along the axial direction of the housing 11. The diameter of the connecting shaft 13 may be smaller than the diameter of the end cover 12. The coating surface may be a portion of the end cover 12 that is away from one side of the housing 11 and spaced from the connecting shaft 13. When the connecting shaft 13 is connected to other components, the coating surface may abut against the other components. L1<L2. Among them, L1 may be the dimension of the maximum width of the abutment area between the coating brush 221 and the coating surface along the axial direction of the universal joint assembly 01. L2 may be the dimension in the radial direction of the coating surface. In order to reduce the consumption of anti-friction agent, the coating brush 221 used can be a smaller soft-bristle brush. In this way, when applying the anti-friction agent, the coating brush 221 will not apply the anti-friction agent to the outer peripheral surface of the universal joint assembly 01 that does not need to be applied, thereby reducing the cost of anti-friction agent coating and avoiding the anti-friction agent being applied to the outer peripheral surface of the universal joint assembly 01 that does not need to be applied, which will have a negative impact on the universal joint assembly 01.

[0075] like Figure 4 As shown, the coating assembly 02 may include a base unit 21 and a coating unit 22. The base unit 21 may include a base 211 and a motion module 212. The motion module 212 may include a positioning platform 2121, a rotating portion 2122, and a moving portion 2123. The positioning platform 2121 may fix the universal joint assembly 01, and the rotating portion 2122 may be detachably connected to an end of the moving portion 2123 away from the base 211, so as to prevent the universal joint assembly 01 from being separated from the positioning platform 2121 when the rotating portion 2122 rotates the universal joint assembly 01, thereby causing damage to the universal joint assembly 01. The moving portion 2123 may be movably connected to the base 211. The moving portion 2123 may drive the end cover 12 to reciprocate along the radial direction of the end cover 12. The end of the rotating portion 2122 away from the moving portion 2123 may be detachably connected to the positioning platform 2121. The coating unit 22 may include a coating brush 221, a mechanical arm 222, and a storage portion 224. The mechanical arm 222 can be detachably connected to the coating brush 221. The internal space of the storage unit 224 can store the friction reducer. The mechanical arm 222 can drive the coating brush 221 to absorb the friction reducer in the storage unit 224, and the mechanical arm 222 can drive the coating brush 221 fully absorbed with the friction reducer to move to abut against the coating surface of the universal joint assembly 01.

[0076] The friction reducing agent coating system may include a coating state. The coating state may include a detachable connection between the housing 11 and the end of the positioning platform 2121 away from the base 211. The moving part 2123 drives the end cover 12 to move radially along the end cover 12. The rotating part 2122 can drive the end cover 12 to rotate around the central axis of the end cover 12. The mechanical arm 222 can drive the coating brush 221 to move to abut against the coating surface. In this way, the uniform coating of the friction reducing agent on the coating surface of the universal joint assembly 01 is completed through the radial movement and rotation of the end cover 12.

[0077] In this embodiment, if Figure 2 As shown, the motion module 212 may further include a lifting portion 2124. The moving portion 2123 may be detachably connected to the rotating portion 2122 via the lifting portion 2124.

[0078] The coating state may also include the lifting part 2124 driving the end cover 12 to move closer to the base 211 or away from the base 211. Thus, the lifting part 2124 adjusts the contact area between the coating surface and the coating brush 221, so that the friction reducing agent on the coating brush 221 can be better utilized.

[0079] In other embodiments, the coating unit 22 may further include a grabbing portion 223, which may be detachably connected to the robotic arm 222. The grabbing portion 223 may move the universal joint assembly 01 to be detachably connected to the positioning portion, or move the coated universal joint assembly 01 to a transmission track for subsequent operations.

[0080] Those skilled in the art will appreciate that the above-mentioned embodiments are specific examples for implementing the present disclosure, and in actual applications, various changes may be made thereto in form and detail without departing from the scope of the present disclosure.

Claims

1. A friction reducing agent coating method, characterized in that: The friction reducing agent coating method comprises: Step S10, based on the completion of the positioning of the universal joint assembly, drive the coating brush to move to abut against the coating surface of the universal joint assembly; wherein the universal joint assembly includes a shell, an end cover, and a connecting shaft; the shell, the end cover, and the connecting shaft are fixedly connected in sequence along the axial direction of the shell; the diameter of the connecting shaft is smaller than the diameter of the end cover; the coating surface is the part of the end cover away from the side of the shell and spaced from the connecting shaft; L1<L2; wherein L1 is the maximum width of the abutment area between the coating brush and the coating surface; L2 is the size of the coating surface along the radius direction of the end cover; Step S20, based on the abutment between the coating brush and the coating surface, driving the end cover to rotate around the central axis of the end cover in a first direction and at a first speed and to reciprocate along the radial direction of the end cover until the end cover rotates around the central axis of the end cover by a first set angle; wherein when the end cover moves along the radial direction of the end cover, the coating brush reciprocates relative to the coating surface in a first area and a second area on one side of the central axis of the end cover; the coating surface includes a first area and a second area; the inner circumference of the second area is connected to the outer circumference of the first area; Step S30: based on the end cover rotating about the central axis of the end cover by the first set angle in the first direction and at the first speed, the end cover stops moving and rotating.

2. A friction reducing agent coating method according to claim 1, characterized in that: The step S20 comprises: Step S21, based on the coating brush abutting against the first range of the second area, driving the end cover to rotate around the central axis of the end cover to a second set angle in the first direction and at the first speed; wherein when the end cover moves along the radial direction of the end cover, the coating brush reciprocates relative to the coating surface in the first area and the second area on one side of the central axis of the end cover; the second area includes the first area and the second area; the inner circumference of the first area is connected to the outer circumference of the first area; the inner circumference of the second area is connected to the outer circumference of the first area; Step S22, based on the end cover rotating around the central axis of the end cover to the second set angle in the first direction and at the first speed, driving the end cover to reciprocate along the radial direction of the end cover; Step S23: based on the reciprocating movement of the end cover along the radial direction of the end cover, the end cover rotates from the second set angle to the first set angle in the first direction and at the first speed.

3. A friction reducing agent coating method according to claim 2, characterized in that: The step S21 comprises: Step S211, based on the coating brush abutting against the first range, driving the end cap to move close to one end of the coating brush to a first set height; Step S212: based on the end cap moving close to one end of the coating brush to the first set height, the end cap is driven to rotate around the central axis of the end cap to a second set angle in the first direction and at the first speed.

4. A friction reducing agent coating method according to claim 2, characterized in that: The step S23 comprises: Step S231, based on the reciprocating movement of the end cover along the radial direction of the end cover, the end cover rotates to the second set angle in the first direction and at the first speed; Step S232, based on the end cover rotating to the second set angle in the first direction and at the first speed, driving the end cover to rotate from the second set angle to the first set angle in the first direction and at the second speed; wherein the second speed is less than the first speed.

5. A friction reducing agent coating method according to claim 4, characterized in that: The step S232 includes: Step S2321, based on the end cover rotating to the second set angle in the first direction and at the first speed, driving the end cover to rotate from the second set angle to a third set angle in the first direction and at the second speed; Step S2322, based on the end cover rotating from the third set angle to the third set angle in the first direction and at the second speed, the end cover moves close to one end of the coating brush to a second set height; Step S2323: based on the end cap moving close to one end of the coating brush to the second set height, the end cap rotates from the third set angle to the first set angle in the first direction and at the second speed.

6. A friction reducing agent coating method according to claim 5, characterized in that: The step S2323 further includes: Step S23231, based on the end cap moving close to one end of the coating brush to the second set height, the end cap rotates from the third set angle to a fourth set angle in the first direction and at the second speed; Step S23232, based on the end cap rotating from the third set angle to the fourth set angle in the first direction and at the second speed, driving the end cap to move close to one end of the coating brush to a third set height; Step S23233: based on the end cap moving close to one end of the coating brush to the third set height, the end cap rotates from the fourth set angle to the first set angle in the first direction and at the first speed.

7. A friction reducing agent coating method according to any one of claims 2 to 6, characterized in that: V1>V2; wherein V1 is the rotation speed of the end cap when the coating brush abuts against the set area for the first time; V2 is the rotation speed of the end cap when the coating brush abuts against the set area for the second time and thereafter; the set area is the area covered by the coating surface when the coating brush abuts against the first range until the end cap rotates in the first direction around the central axis of the end cap to the second set angle.

8. A friction reducing agent coating method according to claim 1, characterized in that: The step S30 further includes: Step S30: based on the end cover rotating about the central axis of the end cover by the first set angle in the first direction and at the first speed, the end cover rotates about the central axis of the end cover by a fifth set angle in a second direction.

9. A friction reducing agent coating system, characterized in that: The friction reducing agent coating system is applied to a friction reducing agent coating method according to any one of claims 1 to 8, and the friction reducing agent coating system comprises: A universal joint assembly, the universal joint assembly comprising a shell, an end cover, and a connecting shaft; the shell, the end cover, and the connecting shaft are fixedly connected in sequence along the axial direction of the shell; the diameter of the connecting shaft is smaller than the diameter of the end cover; the coating surface is the portion of the end cover that is away from one side of the shell and spaced from the connecting shaft; L1<L2; wherein L1 is the maximum width of the contact area between the coating brush and the coating surface along the axial direction of the universal joint assembly; L2 is the radial dimension of the coating surface; A coating assembly, the coating assembly comprising a base unit and a coating unit; the base unit comprising a base and a motion module; the motion module comprising a positioning platform, a rotating part, and a moving part; the moving part is movably connected to the base; the rotating part is detachably connected to an end of the moving part away from the base; the end of the rotating part away from the moving part is detachably connected to the positioning platform; the coating unit comprises a coating brush, a mechanical arm, and a storage part; the mechanical arm is detachably connected to the coating brush; the internal space of the storage part stores a friction reducer; The friction reducing agent coating system includes a coating state; the coating state includes the shell being detachably connected to the positioning platform at one end away from the base; the moving part drives the end cover to move radially along the end cover; the rotating part drives the end cover to rotate around the central axis of the end cover; the robotic arm drives the coating brush to move until it abuts against the coating surface.

10. A friction reducing agent coating system according to claim 9, characterized in that: The motion module further comprises a lifting part; the moving part is detachably connected to the rotating part via the lifting part; The coating state also includes the lifting portion driving the end cover to move toward or away from the base.

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