Grease spraying device and method for assembling electric actuator

Abstract

The invention relates to the technical field of electric actuator production, and discloses a grease spraying device and method for electric actuator assembly.The grease spraying device comprises an operation table and a three-axis module installed above the operation table, and further comprises an installation base; the self-adaptive adjusting assembly is used for adjusting the grease spraying amount according to the fluctuation of the surface of the shell of the electric actuator; and the recovery assembly is used for blocking the splashed grease and recovering the grease. Through the arrangement of the self-adaptive adjusting assembly, the bottom of the polish rod can stretch out and draw back along the fluctuation of the surface of the shell of the electric actuator during spraying operation, so that when the bottom of the polish rod makes contact with a convex part, the amount of grease sprayed out of a spray head is reduced, and when the bottom of the polish rod makes contact with a concave part, the amount of grease sprayed out of the spray head is increased; the technical effect of adaptively adjusting the grease spraying amount is achieved, and a proper amount of grease can be sprayed to the protruding part and the concave part in the shell of the electric actuator.

Description

Technical Field

[0001] The present invention relates to the technical field of electric actuator production, and particularly relates to a grease spraying device and method for electric actuator assembly. Background Art

[0002] During the assembly process of an electric actuator, grease spraying is a key process. The role of grease is crucial. It can play functions such as lubrication, reducing friction, reducing wear, preventing corrosion, and assisting heat dissipation, which is directly related to the performance, life, and reliability of the electric actuator. Since manual grease application is inefficient and it is difficult to ensure the uniformity and accuracy of the application, therefore, in the prior art, an automated spraying device is usually used when spraying grease on an electric actuator.

[0003] Chinese Patent CN103736625B discloses "a grease spraying device". The spraying device is that a pneumatic grease supply unit is respectively connected to a first five-way machine control valve and a second five-way machine control valve; the first five-way machine control valve is connected to a grease spraying seat, and the second five-way machine control valve is simultaneously connected to a first grease spraying head and a second grease spraying head to control the spraying of grease. The advantages of this patent are: it can quickly complete the grease spraying work of components; the spraying is uniform and the lubrication effect is good; no sundries will appear on the spraying surface, ensuring the spraying quality.

[0004] However, in the prior art, the following problems exist:

[0005] When the existing grease spraying device sprays grease inside the housing of an electric actuator, due to the internal structure of the electric actuator, the grease spraying surface inside the housing of the electric actuator is uneven. For the concave parts, since most of the concave parts are the installation positions of the transmission mechanism and have high lubrication requirements, it is necessary to increase the grease spraying amount to completely cover the concave parts to ensure the lubrication effect; for the convex parts, since the convex parts have less contact with the transmission mechanism and have lower lubrication requirements, it is necessary to reduce the grease spraying amount to avoid excessive accumulation of grease on the convex parts and waste of grease; however, when the existing grease spraying device actually sprays, although it can achieve automated spraying by using a module or a robotic arm, the spraying amount is usually set quantitatively, that is, the same spraying amount is used to spray the entire area of the electric actuator, so that the amount of grease covered by the concave parts and the convex parts inside the electric actuator is also relatively close, which may result in insufficient grease amount in local concave parts and excessive grease amount in local convex parts, thus affecting the lubrication effect. Summary of the Invention

[0006] The object of the present invention is to provide a grease spraying device and method for electric actuator assembly to solve the above problems, aiming to overcome the defect that the spraying amount of the existing grease spraying device is usually set quantitatively, so that the amount of grease covered by the concave parts and convex parts in the electric actuator is relatively close, resulting in insufficient grease amount in local concave parts and excessive grease amount in local convex parts. Details are described below.

[0007] To achieve the above object, the present invention provides the following technical solutions:

[0008] A grease spraying device for electric actuator assembly provided by the present invention includes an operating table and a three-axis module installed above it, and further includes: a mounting base; an adaptive adjustment component for adjusting the grease spraying amount according to the undulation of the surface of the electric actuator housing; a recovery component for blocking the splashing grease and recovering the grease; the mounting base is fixedly installed on the three-axis module, and a first frame, a second frame and a third frame are fixedly installed on the mounting base. A grease tank is fixedly installed on the first frame, and a first oil pipe is fixedly connected to the second frame; the adaptive adjustment component includes a fixed ring fixedly installed on the third frame. A rotating ring is rotatably connected to the top of the fixed ring. The inner wall of the fixed ring is fixedly connected with a second oil pipe, and the bottom end of the second oil pipe is fixedly connected with a nozzle. A groove ring is fixedly connected inside the fixed ring, and a plurality of baffles are slidably connected to the groove ring. The inner wall of the rotating ring is fixedly connected with an adjustment ring.

[0009] Preferably, a filter cartridge is fixedly installed inside the grease tank, an oil injection pipe and an air inlet pipe are arranged at the top of the grease tank, and the top of the first oil pipe is connected to the grease tank.

[0010] Preferably, the plurality of baffles are arranged in a circumferential array. A sliding shaft is fixedly connected to the top surface of the baffle. A plurality of sliding grooves are arranged in a circumferential array on the adjustment ring. The plurality of sliding shafts are respectively slidably connected to the plurality of sliding grooves of the adjustment ring. The first oil pipe penetrates and is rotatably connected to the rotating ring. The inner wall of the adjustment ring is rotatably connected to the bottom of the first oil pipe. The inner wall of the groove ring is fixedly connected to the top of the second oil pipe.

[0011] Preferably, a fourth frame is fixedly connected to the outer wall of the fixed ring. A smooth rod penetrates and is slidably connected to the fourth frame. The bottom of the smooth rod is spherical. A connecting block is fixedly connected to the outer wall of the smooth rod. Two rollers are rotatably installed on the connecting block. An inclined wheel is fixedly connected to the outer wall of the rotating ring. The edge of the inclined wheel is located between the two rollers.

[0012] Preferably, a return seat is fixedly connected to the outer wall of the smooth rod, and a spring is arranged between the return seat and the fourth frame.

[0013] Preferably, the adaptive adjustment component further includes a clogging prevention part, which includes a bump, an inner ring and three scraping strips. The bump is fixedly connected to the inner wall of the rotating ring. The inner ring is rotatably connected to the inner wall of the first oil pipe. The bump is slidably connected through the first oil pipe. One end of the bump away from the rotating ring is fixedly connected to the inner ring. The three scraping strips are all fixedly connected to the inner ring. The three scraping strips are all in sliding contact with the inner wall of the first oil pipe. A brush is fixedly connected to the outer wall of the top of the scraping strip. The three brushes are all in sliding contact with the inner wall of the filter cartridge.

[0014] Preferably, the recovery component includes a splash guard and an oil sump. The splash guard is fixedly connected to the outer wall of the polished rod. The splash guard is annularly arranged. The splash guard is located below the nozzle. The oil sump is fixedly connected to the inner side of the bottom of the splash guard.

[0015] Preferably, the recovery component further includes a return oil pipe, two sealing rings, two sealing balls and a hose. The return oil pipe is fixedly connected to the second frame. A flow channel is arranged in the inner wall of the polished rod. The flow channel is provided with an inlet and an outlet. The inlet of the flow channel is located in the oil sump. The outlet of the flow channel is located in the return oil pipe. The outer wall of the top of the polished rod is slidably connected to the inner wall of the return oil pipe. The two sealing rings are respectively fixedly connected to the inner wall of the flow channel and the inner wall of the return oil pipe. The two sealing balls are respectively located inside the two sealing rings. One end of the hose is connected to the return oil pipe. The other end of the hose is connected to the grease tank.

[0016] Preferably, the recovery component further includes a dredging needle, barbs, a right-angle rod, a pull rope and a steel ball. The dredging needle is slidably connected through the oil sump. One end of the dredging needle is located inside the inlet of the flow channel. A spring is arranged between the other end of the dredging needle and the oil sump. The two barbs are fixedly connected to one end of the dredging needle located inside the inlet of the flow channel. The right-angle rod is fixedly connected to the oil sump. The pull rope is fixedly connected to the right-angle rod. The steel ball is fixedly connected to the end of the pull rope away from the right-angle rod.

[0017] A grease spraying method for electric actuator assembly includes the following steps:

[0018] Step 1: Pretreatment of the housing. Use a high-pressure air gun to remove impurities such as iron filings and dust in the electric actuator housing to ensure that the surface has no particulate contaminants.

[0019] Step 2: Path planning. Set the movement path of the three-axis module through a computer to plan the spraying path.

[0020] Step 3: Grease preparation. After selecting the appropriate grease, connect the pipeline of the oil replenishing device to the injection oil pipe, inject the grease into the grease tank, and connect the pipeline of the air pump to the intake pipe.

[0021] Step 4: Spraying operation. Place the electric actuator housing to be sprayed on the operating table, position it using the fixture, start the air pump, oil replenishing device, and three-axis module, and perform the spraying operation.

[0022] Step 5: Maintenance. After the operation is completed, clean and maintain the operating table, adaptive adjustment component, and recovery component.

[0023] The beneficial effects are as follows:

[0024] 1. For this grease spraying device for electric actuator assembly, through the setting of the adaptive adjustment component, the bottom of the optical rod can expand and contract along with the undulation of the surface of the electric actuator housing during the spraying operation. When the bottom of the optical rod touches the raised part, the amount of grease sprayed by the nozzle decreases, and when the bottom of the optical rod touches the concave part, the amount of grease sprayed by the nozzle increases, achieving the technical effect of adaptively adjusting the grease spraying amount, so that both the raised parts and the concave parts in the electric actuator housing can be sprayed with an appropriate amount of grease.

[0025] 2. For this grease spraying device for electric actuator assembly, through the setting of the anti-blocking part, the three scraping bars can continuously scrape the grease layer attached to the inner wall of the first oil pipe by reciprocating rotation during the spraying operation, preventing the formation of sludge and impurity layers on the inner wall of the first oil pipe, thereby avoiding the blockage of the first oil pipe; the three brushes can rotate following the three scraping bars, thus continuously dredging the filter cartridge and avoiding the blockage of the filter cartridge.

[0026] 3. For this grease spraying device for electric actuator assembly, through the setting of the recovery component, the splash guard can intercept the splashing grease and collect it through the oil groove. When the optical rod moves up and down reciprocally, it can continuously pump the grease in the oil groove back into the grease tank for reuse by the cooperation between the flow channel, the oil return pipe, and the hose, reducing the waste of grease; through the setting of the dredging needle, the dredging needle can keep the inlet of the flow channel unobstructed, preventing impurities from entering the flow channel. Description of the Drawings

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0028] Figure 1 It is the overall structural schematic diagram of the present invention;

[0029] Figure 2 It is the structural schematic diagram of the mounting seat of the present invention;

[0030] Figure 3It is a schematic structural diagram of the adaptive adjustment component of the present invention;

[0031] Figure 4 It is a schematic structural diagram of the polished rod of the present invention;

[0032] Figure 5 It is a schematic structural diagram of the baffle of the present invention;

[0033] Figure 6 It is a schematic structural diagram of the groove ring of the present invention;

[0034] Figure 7 It is a schematic structural diagram of the anti-blocking part of the present invention;

[0035] Figure 8 It is a schematic structural diagram of the brush of the present invention;

[0036] Figure 9 It is a schematic structural diagram of the recycling component of the present invention;

[0037] Figure 10 It is a schematic structural diagram of the splash guard of the present invention;

[0038] Figure 11 It is a schematic structural diagram of the return oil pipe of the present invention;

[0039] Figure 12 It is a schematic structural diagram of the dredging needle of the present invention.

[0040] The description of the reference numerals is as follows: 1. Operating table; 2. Three-axis module; 3. Mounting seat; 31. First frame; 32. Second frame; 33. Third frame; 4. Grease tank; 41. Filter cartridge; 5. First oil pipe; 6. Adaptive adjustment component; 61. Fixed ring; 62. Rotating ring; 63. Fourth frame; 64. Polished rod; 65. Rebound seat; 66. Connecting block; 67. Roller; 68. Inclined wheel; 69. Groove ring; 610. Baffle; 611. Slide shaft; 612. Adjusting ring; 7. Anti-blocking part; 71. Convex block; 72. Inner ring; 73. Scraping strip; 74. Brush; 8. Recycling component; 81. Splash guard; 82. Oil groove; 83. Flow channel; 84. Return oil pipe; 85. Sealing ring; 86. Sealing ball; 87. Hose; 88. Dredging needle; 89. Barbs; 810. Right-angle rod; 811. Pulling rope; 812. Steel ball; 9. Second oil pipe; 10. Nozzle. Detailed implementation manners

[0041] To make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be described in detail below. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other implementation manners obtained by those of ordinary skill in the art based on the embodiments of the present invention without any creative efforts belong to the scope protected by the present invention.

[0042] Example 1

[0043] Please refer to Figure 1 - Figure 6 , a grease spraying device for electric actuator assembly, including an operating table 1 and a three-axis module 2 installed above it, and further including: a mounting base 3, the mounting base 3 is fixedly installed on the three-axis module 2, a first bracket 31, a second bracket 32 and a third bracket 33 are fixedly installed on the mounting base 3, a grease tank 4 is fixedly installed on the first bracket 31, and a first oil pipe 5 is fixedly connected to the second bracket 32; a filter cartridge 41 is fixedly installed inside the grease tank 4, and the filter cartridge 41 in the grease tank 4 can filter the grease entering the first oil pipe 5, intercept the impurities in the grease, and prevent the impurities from entering the first oil pipe 5. The top of the grease tank 4 is provided with an oil injection pipe and an air inlet pipe. The top of the first oil pipe 5 is connected to the grease tank 4. The oil injection pipe on the grease tank 4 is connected to an external oil replenishment device through a pipeline. The grease is replenished into the grease tank 4 through the oil replenishment device. The air inlet pipe on the grease tank 4 is connected to an external air pump through a pipeline. During the spraying operation, by injecting air, the pressure in the grease tank 4 is increased, and the grease is ejected by the action of air pressure. The three-axis module 2 moves the path through computer programming. After the electric actuator housing is positioned on the operating table 1 through a jig, the three-axis module 2 drives the mounting base 3 to move along the spraying path. Among them, the external oil replenishment device, air pump, jig, three-axis module 2 and computer are all prior arts, and their specific structures and working principles will not be elaborated here too much.

[0044] Furthermore, please refer to Figure 1 - Figure 6 , an adaptive adjustment component 6, used to adjust the grease spraying amount according to the surface undulation of the electric actuator housing; the adaptive adjustment component 6 includes a fixed ring 61, the fixed ring 61 is fixedly installed on the third bracket 33, the top of the fixed ring 61 is rotatably connected with a rotating ring 62, the inner wall of the fixed ring 61 is fixedly connected with a second oil pipe 9, the bottom end of the second oil pipe 9 is fixedly connected with a spray head 10, the inner part of the fixed ring 61 is fixedly connected with a groove ring 69, a plurality of baffles 610 are slidably connected to the groove ring 69, the inner wall of the rotating ring 62 is fixedly connected with an adjusting ring 612, the plurality of baffles 610 are arranged in a circumferential array, and the plurality of baffles 610 are in sliding contact in sequence. The top surface of the baffle 610 is fixedly connected with a sliding shaft 611. A plurality of sliding grooves are arranged in a circumferential array on the adjusting ring 612. The plurality of sliding shafts 611 are respectively slidably connected with the plurality of sliding grooves of the adjusting ring 612. The first oil pipe 5 is rotatably connected through the rotating ring 62. The inner wall of the adjusting ring 612 is rotatably connected with the bottom of the first oil pipe 5. The inner wall of the groove ring 69 is fixedly connected with the top of the second oil pipe 9. A through port is formed between the plurality of baffles 610 (such as Figure 5As shown, when the adjusting ring 612 rotates counterclockwise, the adjusting ring 612 moves a plurality of baffles 610 towards the direction close to the center of the groove ring 69 through the cooperation of a plurality of chutes and sliding shafts 611, so that the through - openings between the plurality of baffles 610 are narrowed. When the adjusting ring 612 rotates clockwise, the adjusting ring 612 moves a plurality of baffles 610 towards the direction away from the center of the groove ring 69 through the cooperation of a plurality of chutes and sliding shafts 611, so that the through - openings between the plurality of baffles 610 are enlarged (as Figure 5 shown). The through - openings between the plurality of baffles 610 are located between the first oil pipe 5 and the second oil pipe 9. When the through - openings are narrowed, the amount of grease entering the second oil pipe 9 per unit time decreases. When the through - openings are enlarged, the amount of grease entering the second oil pipe 9 per unit time increases (as Figure 4 , Figure 5 shown).

[0045] Furthermore, please refer to Figure 2 - Figure 4 , Figure 9, the outer wall of the fixed ring 61 is fixedly connected with a fourth support 63. A polished rod 64 is slidably connected through the fourth support 63. The bottom of the polished rod 64 is spherical. The outer wall of the polished rod 64 is fixedly connected with a spring return seat 65. A spring is arranged between the spring return seat 65 and the fourth support 63. During the spraying operation, keep the spherical bottom of the polished rod 64 in contact with the surface of the electric actuator housing and apply pressure to make the polished rod 64 move upward by a certain distance. The spring on the spring return seat 65 contracts. The spherical bottom of the polished rod 64 is made of a smooth material. When the spherical bottom of the polished rod 64 touches the convex part of the electric actuator housing, the polished rod 64 slides upward along the convex part. When the spherical bottom of the polished rod 64 touches the concave part of the electric actuator housing, the polished rod 64 slides downward along the concave part. The outer wall of the polished rod 64 is fixedly connected with a connecting block 66. Two rollers 67 are rotatably installed on the connecting block 66. The outer wall of the rotating ring 62 is fixedly connected with an inclined wheel 68. The edge of the inclined wheel 68 is located between the two rollers 67. When the two rollers 67 move, they contact the edge of the inclined wheel 68. The inclined wheel 68 is an inclined ring. When the two rollers 67 move up and down, they slide on the edge of the inclined wheel 68 to apply a thrust to the inclined wheel 68, so that when the two rollers 67 move upward, they can drive the inclined wheel 68 to rotate counterclockwise, and when the two rollers 67 move downward, they can drive the inclined wheel 68 to rotate clockwise. When the bottom of the polished rod 64 touches the convex part, the amount of grease sprayed by the nozzle 10 decreases. When the bottom of the polished rod 64 touches the concave part, the amount of grease sprayed by the nozzle 10 increases; through the setting of the adaptive adjustment component 6, the bottom of the polished rod 64 can expand and contract along with the undulation of the surface of the electric actuator housing during the spraying operation, so that when the bottom of the polished rod 64 touches the convex part, the amount of grease sprayed by the nozzle 10 decreases, and when the bottom of the polished rod 64 touches the concave part, the amount of grease sprayed by the nozzle 10 increases, achieving the technical effect of adaptively adjusting the grease spraying amount, so that both the convex part and the concave part in the electric actuator housing can be sprayed with an appropriate amount of grease.

[0046] In addition, please refer to Figure 3 , Figure 7 - Figure 8 , the adaptive adjustment component 6 further includes a clogging prevention part 7. The clogging prevention part 7 includes a convex block 71, an inner ring 72 and three scraping strips 73. The convex block 71 is fixedly connected to the inner wall of the rotating ring 62. The inner ring 72 is rotatably connected to the inner wall of the first oil pipe 5. The convex block 71 is slidably connected through the first oil pipe 5. The end of the convex block 71 away from the rotating ring 62 is fixedly connected to the inner ring 72. The three scraping strips 73 are all fixedly connected to the inner ring 72. The three scraping strips 73 are all in sliding contact with the inner wall of the first oil pipe 5. When the inner ring 72 rotates, it drives the three scraping strips 73 to rotate (as Figure 7As shown, when the three scraping bars 73 rotate, they can continuously clean the inner wall of the first oil pipe 5, preventing a thick grease layer from adhering to the inner wall of the first oil pipe 5 after long-term use, thus forming a sludge and impurity layer, which in turn affects the flow cross-sectional area of the first oil pipe 5. Through the setting of the anti-blocking part 7, the three scraping bars 73 can continuously scrape the grease layer adhering to the inner wall of the first oil pipe 5 through reciprocating rotation during the spraying operation, preventing the formation of a sludge and impurity layer at the inner wall of the first oil pipe 5, thereby avoiding the blockage of the first oil pipe 5.

[0047] In addition, please refer to Figure 8 , a brush 74 is fixedly connected to the outer wall of the top of the scraping bar 73. The three brushes 74 are all in sliding contact with the inner wall of the filter cartridge 41. The three brushes 74 can rotate with the three scraping bars 73, thereby continuously dredging the filter cartridge 41 and preventing the filter cartridge 41 from being blocked.

[0048] It should be noted that please refer to Figure 1 , Figure 9 - Figure 12 , a recovery assembly 8, which is used to block the splashing grease and recover the grease; the recovery assembly 8 includes a splash guard 81 and an oil sump 82. The splash guard 81 is fixedly connected to the outer wall of the optical rod 64. The splash guard 81 is annularly arranged and is located below the nozzle 10. The oil sump 82 is fixedly connected to the inner bottom of the splash guard 81. The splash guard 81 can block the splashing grease, and the splashing grease slides down into the oil sump 82 after being intercepted by the splash guard 81 (as Figure 10 shown).

[0049] It should be noted that please refer to Figure 9 - Figure 11 , the recovery assembly 8 further includes an oil return pipe 84, two sealing rings 85, two sealing balls 86 and a hose 87. The oil return pipe 84 is fixedly connected to the second frame 32. A flow channel 83 is arranged inside the optical rod 64. The flow channel 83 is provided with an inlet and an outlet. The inlet of the flow channel 83 is located in the oil sump 82. The oil sump 82 is provided with a slope to make the grease flow towards the inlet of the flow channel 83 (as Figure 10 shown), the outlet of the flow channel 83 is located in the oil return pipe 84. The outer wall of the top of the optical rod 64 is slidably connected to the inner wall of the oil return pipe 84. The two sealing rings 85 are respectively fixedly connected to the inner wall of the flow channel 83 and the inner wall of the oil return pipe 84. The two sealing balls 86 are respectively located inside the two sealing rings 85. The sealing balls 86 and the sealing rings 85 form a check mechanism. When the fluid flows from bottom to top, it can lift the sealing ball 86, causing the sealing ball 86 to disengage from the sealing ring 85, and the fluid flows upward through the gap between the sealing ball 86 and the sealing ring 85. When the fluid flows from top to bottom, the sealing ball 86 abuts against the sealing ring 85 to form a seal, blocking the downward flow path of the fluid (as Figure 11As shown, one end of the hose 87 is connected to the oil return pipe 84, and the other end of the hose 87 is connected to the grease tank 4. When the polished rod 64 moves up and down reciprocally, the flow channel 83 can continuously extract the grease in the oil sump 82, so that the grease is transported to the grease tank 4 through the oil return pipe 84 and the hose 87. Through the setting of the recovery component 8, the splash guard 81 can intercept the splashing grease and collect it through the oil sump 82. When the polished rod 64 moves up and down reciprocally, it can continuously pump the grease in the oil sump 82 back to the grease tank 4 through the cooperation among the flow channel 83, the oil return pipe 84 and the hose 87 for reuse, reducing the waste of grease.

[0050] It is worth mentioning that, please refer to Figure 12 , the recovery component 8 further includes a dredging needle 88, barbs 89, a right-angle rod 810, a pull rope 811 and a steel ball 812. The dredging needle 88 is slidably connected through the oil sump 82. One end of the dredging needle 88 is located inside the inlet of the flow channel 83. A spring is arranged between the other end of the dredging needle 88 and the oil sump 82. Two barbs 89 are fixedly connected to one end of the dredging needle 88 located inside the inlet of the flow channel 83. The right-angle rod 810 is fixedly connected to the oil sump 82. The pull rope 811 is fixedly connected to the right-angle rod 810. The steel ball 812 is fixedly connected to the end of the pull rope 811 away from the right-angle rod 810. When the steel ball 812 moves, it will swing due to inertia. When the steel ball 812 swings, it will hit the end of the dredging needle 88 away from the flow channel 83, causing the dredging needle 88 to move towards the direction close to the flow channel 83 and then reset by the elastic force of the spring. During the movement of the dredging needle 88, it can continuously dredge the inlet of the flow channel 83 and hook out the impurities stuck at the inlet of the flow channel 83 through the two barbs 89, avoiding the blockage of the flow channel 83. Through the setting of the dredging needle 88, the dredging needle 88 can keep the inlet of the flow channel 83 unblocked and prevent impurities from entering the flow channel 83.

[0051] Embodiment 2

[0052] A grease spraying method for electric actuator assembly includes the following steps:

[0053] Step 1: Shell pretreatment, use a high-pressure air gun to remove impurities such as iron filings and dust in the electric actuator shell to ensure that the surface has no particulate contaminants;

[0054] Step 2: Path planning, set the movement path of the three-axis module 2 through a computer to plan the spraying path;

[0055] Step 3: Grease preparation, after selecting the appropriate grease, connect the pipeline of the oil replenishing device to the oil injection pipe, inject the grease into the grease tank 4, and connect the pipeline of the air pump to the air inlet pipe;

[0056] Step 4: Spraying operation, place the electric actuator shell to be sprayed on the operating table 1, use a jig for positioning, start the air pump, the oil replenishing device and the three-axis module 2, and perform the spraying operation;

[0057] Step Five: Maintenance. After the operation is completed, clean and maintain the operation console 1, the adaptive adjustment component 6, and the recycling component 8.

[0058] With the above structure, the working principle of this case is as follows: The oil injection pipe on the grease tank 4 is connected to the pipeline of the external oil replenishing device, and grease is replenished into the grease tank 4 through the oil replenishing device. During the spraying operation, grease is timely replenished into the grease tank 4. The filter cartridge 41 in the grease tank 4 can filter the grease entering the first oil pipe 5, intercept the impurities in the grease, and prevent the impurities from entering the first oil pipe 5. The air inlet pipe on the grease tank 4 is connected to the pipeline of the external air pump. During the spraying operation, by injecting air, the pressure in the grease tank 4 increases, so that the grease is ejected through the first oil pipe 5, between multiple baffles 610, the second oil pipe 9 and the nozzle 10. The three-axis module 2 moves the path through computer programming. After the electric actuator housing is positioned on the operation table 1 through the fixture, the three-axis module 2 drives the grease tank 4, the first oil pipe 5, the adaptive adjustment component 6, the recovery component 8, the second oil pipe 9 and the nozzle 10 to move along the spraying path through the mounting seat 3 for spraying operation. Among them, the external oil replenishing device, the air pump, the fixture, the three-axis module 2 and the computer are all prior arts, and their specific structures and working principles will not be elaborated here;During the spraying operation, keep the spherical bottom of the polished rod 64 in contact with the surface of the electric actuator housing and apply pressure to move the polished rod 64 upward by a certain distance. The spring on the spring return seat 65 contracts. The spherical bottom of the polished rod 64 is made of a smooth material. When the spherical bottom of the polished rod 64 touches the raised part of the electric actuator housing, the polished rod 64 slides upward along the raised part. When the spherical bottom of the polished rod 64 touches the sunken part of the electric actuator housing, the polished rod 64 slides downward along the sunken part. When the polished rod 64 slides on the electric actuator housing using the spherical bottom, it can move upward or downward according to the surface undulations of the electric actuator housing. A roller can also be installed at the spherical bottom of the polished rod 64 to adapt to the electric actuator housing with larger undulations. When the polished rod 64 moves up and down, the polished rod 64 drives the two rollers 67 to move up and down synchronously through the connecting block 66. The two rollers 67 are in contact with the edge of the inclined wheel 68. The inclined wheel 68 is an inclined ring. When the two rollers 67 move up and down, they slide on the edge of the inclined wheel 68 to apply a thrust to the inclined wheel 68, so that the inclined wheel 68 can be driven to rotate counterclockwise when the two rollers 67 move up, and the inclined wheel 68 can be driven to rotate clockwise when the two rollers 67 move down. When the inclined wheel 68 rotates, it drives the rotating ring 62 to rotate. When the rotating ring 62 rotates, it drives the adjusting ring 612 to rotate. The multiple baffles 610 are arranged in a circular shaft array, and the multiple baffles 610 are in sliding contact in sequence. The movement trajectories of the multiple baffles 610 on the groove ring 69 are also arranged in a circular shaft array. A through port is formed between the multiple baffles 610. When the adjusting ring 612 rotates counterclockwise, the adjusting ring 612 moves the multiple baffles 610 toward the direction close to the center of the groove ring 69 through the cooperation of the multiple chutes and the sliding shafts 611, so that the through port between the multiple baffles 610 shrinks. When the adjusting ring 612 rotates clockwise, the adjusting ring 612 moves the multiple baffles 610 toward the direction away from the center of the groove ring 69 through the cooperation of the multiple chutes and the sliding shafts 611, so that the through port between the multiple baffles 610 expands. Therefore, when the polished rod 64 and the two rollers 67 move up, the through port between the multiple baffles 610 shrinks. When the polished rod 64 and the two rollers 67 move down, the through port between the multiple baffles 610 expands. The through port between the multiple baffles 610 is located between the first oil pipe 5 and the second oil pipe 9. When the through port shrinks, the amount of grease entering the second oil pipe 9 per unit time decreases. When the through port expands, the amount of grease entering the second oil pipe 9 per unit time increases. Combining the above content, when the bottom of the polished rod 64 touches the raised part, the amount of grease sprayed by the nozzle 10 decreases. When the bottom of the polished rod 64 touches the sunken part, the amount of grease sprayed by the nozzle 10 increases.;

[0059] When the rotating ring 62 rotates, the inner ring 72 is driven to rotate through the protrusion 71, and when the inner ring 72 rotates, the three scraper strips 73 are driven to rotate, so that when the light rod 64 is extended and retracted during the spraying operation, the three scraper strips 73 can also rotate reciprocatingly. When the three scraper strips 73 rotate, the inner wall of the first oil pipe 5 can be continuously cleaned to prevent a thick layer of grease from adhering to the inner wall of the first oil pipe 5 after long-term use, thereby forming a sludge and impurity layer, which in turn affects the flow cross-sectional area of ​​the first oil pipe 5. The three scraper strips 73 can also have a certain stirring and mixing effect to make the grease texture more uniform. When the brushes 74 on the top of the three scraper strips 73 rotate, they can also continuously clear the filter cartridge 41 from the inside of the filter cartridge 41 to the outside to prevent the filter cartridge 41 from being blocked.

[0060] During the spraying operation, the splash shield 81 moves with the polished rod 64. Since the grease sprayed from the nozzle 10 may splash, the splash shield 81 can block the splashing grease. The splashing grease is intercepted by the splash shield 81 and then slides down into the oil groove 82. The oil groove 82 is provided with a slope to make the grease flow to the entrance of the flow channel 83. When the polished rod 64 moves up and down, the top of the polished rod 64 shrinks up and down in the oil return pipe 84. When the polished rod 64 moves down, the grease in the oil return pipe 84 is pumped, so that the sealing ball 86 in the oil return pipe 84 is adsorbed on the sealing ring 85. At this time, the oil return pipe The sealing ball 86 and the sealing ring 85 in the oil return pipe 84 form a seal, and the grease in the oil return pipe 84 will not move downward temporarily, so that the flow channel 83 sucks the grease in the oil groove 82 through the inlet, and the grease in the flow channel 83 is pulled upward and pushes the sealing ball 86 in the flow channel 83 upward, so that the sealing ball 86 is separated from the sealing ring 85, and the grease enters the oil return pipe 84 through the gap between the sealing ball 86 and the sealing ring 85. When the polished rod 64 moves upward, the polished rod 64 squeezes the grease in the oil return pipe 84, so that the grease in the oil return pipe 84 moves upward and pushes the oil return pipe 84 into the oil return pipe 84. The sealing ball 86 is lifted up, and the grease enters the hose 87 through the gap between the sealing ball 86 and the sealing ring 85. At this time, the sealing ball 86 in the flow channel 83 is squeezed and pressed against the sealing ring 85 to form a seal. In combination with the above content, when the light rod 64 moves up and down, the flow channel 83 can continuously extract the grease in the oil groove 82, so that the grease is transported to the grease tank 4 through the oil return pipe 84 and the hose 87 for reuse, thereby reducing the waste of grease; during the spraying operation, the splash shield 81 drives the steel rod 810 and the pull rope 811 to move ... seal. As the ball 812 moves, the steel ball 812 will swing due to inertia, and will hit the end of the unblocking needle 88 away from the flow channel 83 when swinging, causing the unblocking needle 88 to move toward the flow channel 83 and then reset by the elastic force of the spring. During the spraying operation, a small amount of impurities may enter the oil tank 82, which may cause the impurities to get stuck at the entrance of the flow channel 83. The unblocking needle 88 can continuously unblock the entrance of the flow channel 83 during the movement, and hook out the impurities stuck at the entrance of the flow channel 83 through two barbs 89 to avoid blockage of the flow channel 83.

[0061] As described above, it is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention can easily think of changes or substitutions, which should all be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims described above.

Claims

1. A grease spraying device for electric actuator assembly, comprising an operation table (1) and a three-axis module (2) installed above it, characterized in that, It also includes: a mounting base (3); an adaptive adjustment component (6) for adjusting the grease spraying amount according to the undulation of the surface of the electric actuator housing; a recovery component (8) for blocking the splashing grease and recovering the grease; The mounting base (3) is fixedly installed on the three-axis module (2). A first frame (31), a second frame (32) and a third frame (33) are fixedly installed on the mounting base (3). A grease tank (4) is fixedly installed on the first frame (31), and a first oil pipe (5) is fixedly connected to the second frame (32); The adaptive adjustment component (6) includes a fixed ring (61). The fixed ring (61) is fixedly installed on the third frame (33). A rotating ring (62) is rotatably connected to the top of the fixed ring (61). A second oil pipe (9) is fixedly connected to the inner wall of the fixed ring (61). The bottom end of the second oil pipe (9) is fixedly connected to a nozzle (10). A groove ring (69) is fixedly connected to the inside of the fixed ring (61). A plurality of baffles (610) are slidably connected to the groove ring (69). An adjustment ring (612) is fixedly connected to the inner wall of the rotating ring (62).

2. The grease spraying device for assembling an electric actuator according to claim 1, wherein: A filter cartridge (41) is fixedly installed inside the grease tank (4). An oil injection pipe and an air inlet pipe are arranged at the top of the grease tank (4). The top of the first oil pipe (5) is connected to the grease tank (4).

3. The grease spraying device for assembling an electric actuator according to claim 1, wherein: The plurality of baffles (610) are arranged in a circular array. A sliding shaft (611) is fixedly connected to the top surface of the baffle (610). A plurality of sliding grooves are formed in a circular array on the adjustment ring (612). The plurality of sliding shafts (611) are respectively slidably connected to the plurality of sliding grooves of the adjustment ring (612). The first oil pipe (5) is rotatably connected through the rotating ring (62). The inner wall of the adjustment ring (612) is rotatably connected to the bottom of the first oil pipe (5). The inner wall of the groove ring (69) is fixedly connected to the top of the second oil pipe (9).

4. An oil spraying device for assembling an electric actuator according to claim 3, characterized in that: A fourth frame (63) is fixedly connected to the outer wall of the fixed ring (61). A smooth rod (64) is slidably connected through the fourth frame (63). The bottom of the smooth rod (64) is spherical. A connecting block (66) is fixedly connected to the outer wall of the smooth rod (64). Two rollers (67) are rotatably installed on the connecting block (66). An inclined wheel (68) is fixedly connected to the outer wall of the rotating ring (62). The edge of the inclined wheel (68) is located between the two rollers (67).

5. The grease spraying device for assembling an electric actuator according to claim 4, wherein: A spring return seat (65) is fixedly connected to the outer wall of the smooth rod (64). A spring is arranged between the spring return seat (65) and the fourth frame (63).

6. The grease spraying device for electric actuator assembly according to claim 4, characterized in that: The adaptive adjustment component (6) further includes a clogging prevention part (7). The clogging prevention part (7) includes a bump (71), an inner ring (72) and three scraping bars (73). The bump (71) is fixedly connected to the inner wall of the rotating ring (62). The inner ring (72) is rotatably connected to the inner wall of the first oil pipe (5). The bump (71) is slidably connected through the first oil pipe (5). One end of the bump (71) away from the rotating ring (62) is fixedly connected to the inner ring (72). The three scraping bars (73) are all fixedly connected to the inner ring (72). The three scraping bars (73) are all in sliding contact with the inner wall of the first oil pipe (5). A brush (74) is fixedly connected to the outer wall of the top of the scraping bar (73). The three brushes (74) are all in sliding contact with the inner wall of the filter cartridge (41).

7. An oil spraying device for assembling an electric actuator according to claim 5, characterized in that: The recovery component (8) includes a splash guard (81) and an oil sump (82). The splash guard (81) is fixedly connected to the outer wall of the polished rod (64). The splash guard (81) is arranged in a ring shape. The splash guard (81) is located below the nozzle (10). The oil sump (82) is fixedly connected to the inner side of the bottom of the splash guard (81).

8. An oil spraying device for assembling an electric actuator according to claim 7, characterized in that: The recovery component (8) further includes a return oil pipe (84), two sealing rings (85), two sealing balls (86) and a hose (87). The return oil pipe (84) is fixedly connected to the second bracket (32). A flow channel (83) is arranged in the inner wall of the polished rod (64). The flow channel (83) is provided with an inlet and an outlet. The inlet of the flow channel (83) is located in the oil sump (82). The outlet of the flow channel (83) is located in the return oil pipe (84). The top outer wall of the polished rod (64) is slidably connected to the inner wall of the return oil pipe (84). The two sealing rings (85) are respectively fixedly connected to the inner wall of the flow channel (83) and the inner wall of the return oil pipe (84). The two sealing balls (86) are respectively located inside the two sealing rings (85). One end of the hose (87) is connected to the return oil pipe (84). The other end of the hose (87) is connected to the grease tank (4).

9. An oil spraying device for assembling an electric actuator according to claim 8, characterized in that: The recovery component (8) further includes a dredging needle (88), a barb (89), a right-angle rod (810), a pull rope (811) and a steel ball (812). The dredging needle (88) is slidably connected through the oil sump (82). One end of the dredging needle (88) is located inside the inlet of the flow channel (83). A spring is arranged between the other end of the dredging needle (88) and the oil sump (82). The two barbs (89) are fixedly connected to one end of the dredging needle (88) located inside the inlet of the flow channel (83). The right-angle rod (810) is fixedly connected to the oil sump 8(2). The pull rope 8(11) is fixedly connected to the right-angle rod (810). The steel ball 8(12) is fixedly connected to the end of the pull rope (811) away from the right-angle rod (810).

10. A grease spraying method for electric actuator assembly, characterized in that: Using the grease spraying device for electric actuator assembly according to any one of claims 1-9, further includes the following steps: Step 1: Pretreatment of the housing. Use a high-pressure air gun to remove impurities such as iron filings and dust in the electric actuator housing to ensure that the surface has no particulate contaminants; Step 2: Path planning, set the motion path of the three-axis module (2) through a computer to plan the spraying path; Step 3: Grease preparation, after selecting the appropriate grease, connect the pipeline of the oil replenishing device to the oil injection pipe, inject the grease into the grease tank (4), and connect the air pump pipeline to the air inlet pipe; Step 4: Spraying operation, place the electric actuator housing to be sprayed on the operating table (1), use a fixture for positioning, start the air pump, the oil replenishing device and the three-axis module (2) to perform the spraying operation; Step 5: Maintenance, after the operation is completed, clean and maintain the operating table (1), the adaptive adjustment component (6) and the recovery component (8).

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