Lubricating grease filling device

Abstract

The lubricating grease filling device comprises a filling body provided with a backflow cavity and a filling cavity, a backflow pipe communicating with the backflow cavity and an oil inlet pipe communicating with the filling cavity, and the bottom of the filling body is provided with a filling opening; the filling body has a rough filling state and a closed state, when the filling body is in the rough filling state, the backflow cavity is isolated from the filling cavity, and lubricating grease is discharged from the filling opening to achieve rough filling. And when in the closed state, the backflow cavity is communicated with the filling cavity, and the lubricating grease flows to the backflow cavity and is discharged through the oil return pipe. The driving assembly is used for driving the filling body to switch states; according to the scheme, in the closed state, lubricating grease entering the filling cavity can completely flow back and be discharged, and the problem that the pressure in the oil conveying pipe is too large is solved.

Description

Technical Field

[0001] The present application relates to the technical field of grease filling, and in particular to a grease filling device. Background Art

[0002] Grease is a liquid or semi-solid lubricant used in various types of automobiles and mechanical equipment to reduce friction and protect machinery and processed parts. It mainly plays the roles of lubrication, cooling, rust prevention, cleaning, sealing and buffering.

[0003] Filling is an essential step in the production process of grease. At present, the grease filling device in the industry uses an oil pump to transport grease to the main pipeline. A switch valve is set at the main pipeline. When the switch valve is opened, filling is carried out, and when the switch valve is closed, filling is completed. This filling method will cause the main pipeline for transporting grease to be over-pressured after the current filling barrel is filled and before the next filling barrel is replaced. Summary of the invention

[0004] In view of the above-mentioned defects or deficiencies in the prior art, the present application aims to provide a grease filling device, comprising:

[0005] A filling body, wherein the filling body has a filling shell, a reflux cavity and a filling cavity are arranged in the filling shell along a first direction, and the bottom of the filling body has a filling port connected to the filling cavity;

[0006] An oil delivery assembly, the oil delivery assembly comprising an oil inlet pipe communicating with the filling cavity, and an oil return pipe communicating with the reflux cavity;

[0007] The filling body has a rough filling state and a closed state. When in the rough filling state, the reflux cavity and the filling cavity are isolated, the filling port is opened, and the grease in the oil inlet pipe is discharged through the filling port to achieve filling; when in the closed state, the reflux cavity and the filling cavity are connected, the filling port is closed, and the grease in the filling cavity flows back to the reflux cavity and is discharged from the oil return pipe;

[0008] A driving assembly is used to drive the filling body to switch between the rough filling state and the closed state.

[0009] According to the technical solution provided in the embodiment of the present application, a circle of raised portions is provided on the inner wall of the filling shell, and the reflux chamber and the filling chamber are located on both sides of the raised portions; a ball head rod is provided through the reflux chamber and the filling chamber, the axial direction of the ball head rod is the first direction, and a spherical portion is provided in the middle of the ball head rod, and the driving assembly can drive the ball head rod to move along the first direction to drive the spherical portion to be close to the raised portion or to be separated from the raised portion, so that the filling body can switch between the closed state and the rough filling state.

[0010] According to the technical solution provided in the embodiment of the present application, a valve core assembly is provided at the bottom of the ball head rod. When the valve core assembly is detached from the filling port, the filling body is in the rough filling state. When the valve core assembly closes the filling port, the filling body is in the closed state.

[0011] According to the technical solution provided in the embodiment of the present application, the filling chamber includes, in sequence from a first direction, a first filling chamber close to the reflux chamber and a truncated cone-shaped second filling chamber close to the filling port, the cross-sectional area of ​​the first filling chamber and the second filling chamber at the junction is the same, and the cross-sectional area of ​​the second filling chamber gradually decreases along the first direction from the reflux chamber to the filling port; when the filling body is in the rough filling state, the bottom of the valve core assembly is placed in the first filling chamber; the filling body also has a fine filling state, and when in the fine filling state, the bottom of the valve core assembly is placed in the second filling chamber; the driving assembly can drive the filling body to switch between the rough filling state, the closed state and the fine filling state.

[0012] According to the technical solution provided in the embodiment of the present application, a plurality of guide members are distributed in an array in the circumferential direction of the outer wall of the valve core assembly, and the guide members are in contact with the inner wall of the filling shell at the end away from the valve core assembly.

[0013] According to the technical solution provided in the embodiment of the present application, the drive assembly includes a first pneumatic assembly and a second pneumatic assembly arranged along the first direction, the first pneumatic assembly includes an upper cylinder, the upper cylinder has an upper air chamber, and the upper air chamber is provided with an upper piston movable along the first direction; the second pneumatic assembly includes a lower cylinder, the lower cylinder has a lower air chamber, the lower air chamber is provided with a lower piston movable along the first direction, and the lower piston is connected to the ball head rod away from the upper piston end; the drive assembly has a first state, a second state and a third state, when in the first state, the upper piston and the lower piston are respectively at the top of the upper air chamber and the lower air chamber, and the bottom end of the valve core assembly is placed in the first filling cavity; when in the second state, the upper piston is placed in the middle of the upper air chamber, and the lower piston is placed in the middle of the lower air chamber, and the bottom end of the valve core assembly is placed in the second filling cavity; when in the third state, the upper piston and the lower piston are respectively placed in the middle of the upper air chamber and the bottom of the lower air chamber, and the valve core assembly closes the filling port.

[0014] According to the technical solution provided in the embodiment of the present application, the upper piston includes a first transverse portion, and the upper air chamber includes a first upper air chamber and a second upper air chamber arranged on both sides of the first transverse portion along the first direction; the lower piston includes a second transverse portion, and the lower air chamber includes a first lower air chamber and a second lower air chamber arranged on both sides of the second transverse portion along the first direction; the upper cylinder barrel is provided with a first air port connected to the first upper air chamber and a second air port connected to the second upper air chamber; the lower cylinder barrel is provided with a third air port connected to the first lower air chamber, and a fourth air port connected to the second lower air chamber.

[0015] According to the technical solution provided in the embodiment of the present application, a connecting seat is provided between the upper cylinder and the lower cylinder, a first through hole connecting the second upper air chamber and the first lower air chamber is provided in the middle of the connecting seat, an axial direction of the first through hole is the first direction, a first vertical portion is provided on the second transverse portion close to the side of the first transverse portion, and the first vertical portion is placed in the first through hole.

[0016] According to the technical solution provided in the embodiment of the present application, a fine filling adjustment component is provided at the end of the first pneumatic component away from the second pneumatic component, which is used to adjust the movement distance of the upper piston.

[0017] In summary, the present application proposes a grease filling device, comprising a filling body having a reflux chamber and a filling chamber, a filling port being provided at the bottom of the filling body, and also comprising a reflux pipe connected to the reflux chamber and an oil inlet pipe connected to the filling chamber; the filling body has a rough filling state and a closed state, when in the rough filling state, the reflux chamber and the filling chamber are isolated, and the grease is discharged from the filling port to realize filling; when in the closed state, the reflux chamber and the filling chamber are completely connected, the grease flows to the reflux chamber and is discharged from the oil return pipe, and also comprises a driving component for driving the filling body to switch states; when the present scheme is in the closed state, the grease in the filling chamber can be refluxed and discharged, avoiding the problem of excessive pressure in the oil pipeline. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic diagram of the structure of the filling body and the driving assembly provided in the embodiment of the present application;

[0019] Figure 2 A schematic diagram of the structure of the filling body provided in the embodiment of the present application in a closed state;

[0020] Figure 3 A schematic diagram of the structure of the filling body provided in the embodiment of the present application in a rough filling state;

[0021] Figure 4 A schematic diagram of the structure of the filling body provided in the embodiment of the present application in a fine filling state;

[0022] Figure 5 A front view of the filling device provided in an embodiment of the present application;

[0023] Figure 6 A side view of a filling device provided in an embodiment of the present application;

[0024] Figure 7 A schematic diagram of the structure of the driving assembly when the filling body provided in the embodiment of the present application is in a rough filling state;

[0025] Figure 8 A schematic diagram of the structure of the driving assembly when the filling body provided in the embodiment of the present application is in a fine filling state;

[0026] Fig. 9 A schematic diagram of the structure of the drive assembly when the filling body provided in an embodiment of the present application is in a closed state.

[0027] The text annotations in the figure represent:

[0028] 100, filling body; 101, filling port; 102, filling shell; 103, raised part; 104, second filling cavity; 110, return cavity; 120, filling cavity; 130, ball head rod; 131, spherical part; 140, guide part; 150, pressing sleeve part; 160, compression spring; 170, valve core assembly; 171, guide piece; 200, oil inlet pipe; 300, oil return pipe; 400, drive assembly; 410, upper cylinder; 420, upper air chamber; 421, first upper air chamber; 4211, first air port; 422, second upper air chamber; 4221, second air port; 430, upper piston; 431, first horizontal part; 432, second vertical part; 440, lower Cylinder; 450, lower air chamber; 451, first lower air chamber; 4511, third air port; 452, second lower air chamber; 4521, fourth air port; 460, lower piston; 461, second horizontal portion; 462, first vertical portion; 463, third vertical portion; 470, connecting rod head; 480, upper cover, 481, lower cover, 482, pressure cover; 490, fine filling adjustment assembly; 500, platform scale fixing frame; 510, platform scale, 520, conveyor on scale; 530, non-powered conveyor, 540, column; 550, slide rail; 560, slider; 570, servo motor; 580, filling barrel; 590, lower barrel slope; 600, lifting device; 700, control panel. DETAILED DESCRIPTION

[0029] The present application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the relevant inventions, rather than to limit the inventions. It should also be noted that, for ease of description, only the parts related to the invention are shown in the accompanying drawings.

[0030] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0031] As mentioned in the background technology, the present application proposes a grease filling device, comprising:

[0032] A filling body 100, wherein the filling body 100 has a filling shell 102, wherein a reflux cavity 110 and a filling cavity 120 are arranged in the filling shell 102 along a first direction, and a filling port 101 is provided at the bottom of the filling body 100 and communicates with the filling cavity 120;

[0033] Among them, Figure 1-Figure 2 , Figure 5 and Figure 6As shown, the filling shell 102 is cylindrical, the first direction is a vertical direction, the filling device also includes a platform scale 510 fixing frame 500, a platform scale 510 for weighing is provided on the platform scale 510 fixing frame 500, a scale 510 for weighing is provided on the platform scale 510, a scale conveyor 520 is provided on the platform scale 510, a base is provided on one side of the platform scale 510 fixing frame 500, a non-powered conveyor 530 is provided on the base, the non-powered conveyor 530 and the scale conveyor 520 have the same height, a column 540 is also provided on the base, a slide rail 550 is provided on the top of the column 540, the direction of the slide rail 550 is a vertical direction, a slider 560 that can move along the slide rail 550 is provided on the outside of the filling body 100, a servo motor 570 is provided on the top of the slide rail 550, and the servo motor 570 can drive the filling body 100 to move up and down on the slide rail 550. The top and bottom of the slide rail 550 are both provided with proximity switches; optionally, the power of the servo motor 570 is 0.75KW and the rotation speed is 3000rpm.

[0034] A filling barrel 580 is placed on the on-scale conveyor 520 , and the filling barrel 580 is placed directly below the filling port 101 . When the filling is completed, the filling barrel 580 is pushed to the unpowered conveyor 530 , and is sent out by a lower barrel slope 590 disposed on the side of the unpowered conveyor 530 away from the on-scale conveyor 520 .

[0035] An oil delivery assembly, the oil delivery assembly comprising an oil inlet pipe 200 communicating with the filling cavity 120, and an oil return pipe 300 communicating with the return cavity 110;

[0036] The end of the oil inlet pipe 200 away from the filling body 100 is connected to an oil pump, the end of the oil return pipe 300 away from the filling body 100 is placed with an empty filling barrel 580, and the top of the column 540 is provided with a hoisting device 600, and the hoisting device 600 is used to hoist the oil return pipe 300 and the oil inlet pipe 200. Optionally, a ball valve is provided on the oil return pipe 300, and when there is no requirement for the pressure in the pipe, the oil return pipe 300 can be closed by the ball valve.

[0037] The filling body 100 has a rough filling state and a closed state. When in the rough filling state, the reflux cavity 110 and the filling cavity 120 are isolated, the filling port 101 is opened, and the grease in the oil inlet pipe 200 is discharged through the filling port 101 to achieve filling; when in the closed state, the reflux cavity 110 and the filling cavity 120 are connected, the filling port 101 is closed, and all the grease in the filling cavity 120 flows back to the reflux cavity 110 and is discharged from the oil return pipe 300;

[0038] The driving assembly 400 is used to drive the filling body 100 to switch between the rough filling state and the closed state.

[0039] The driving assembly 400 is arranged at the top of the filling body 100, and the servo motor 570 drives the filling body 100 to drive the driving assembly 400 to move up and down. During filling, the oil inlet pipe 200 is always in the process of conveying grease into the filling body 100. When the current filling barrel 580 is filled and the next filling barrel 580 is replaced, the filling port 101 is in a closed state. Since there is always pressure in the oil inlet pipe 200, all the grease in the filling cavity 120 can be refluxed and discharged through the reflux cavity 110, thereby avoiding the situation where the pressure in the filling body 100 is too high.

[0040] In a preferred embodiment, the inner wall of the filling shell 102 is provided with a circle of raised portions 103, and the reflux chamber 110 and the filling chamber 120 are located on both sides of the raised portion 103; a ball head rod 130 is provided through the reflux chamber 110 and the filling chamber 120, and the axial direction of the ball head rod 130 is the first direction, and a spherical portion 131 is provided in the middle of the ball head rod 130, and the driving assembly 400 can drive the ball head rod 130 to move along the first direction to drive the spherical portion 131 to be close to the raised portion 103 or to be separated from the raised portion 103, so that the filling body 100 can switch between the closed state and the rough filling state.

[0041] like Figure 2 As shown, a guide portion 140 and a pressing sleeve portion 150 are further provided in the filling shell 102 along the up and down directions, the top of the guide portion 140 has a first opening, the bottom of the pressing sleeve portion 150 has a second opening, the ball head rod 130 passes through the first opening and the second opening, the outer walls of the guide portion 140 and the pressing sleeve portion 150 are fixedly connected to the filling shell 102, and a compression spring 160 is further wound around the ball head rod 130, the two ends of the compression spring 160 are respectively abutted against the guide portion 140 and the pressing sleeve portion 150, and the compression spring 160 improves the stability of the up and down movement of the ball head rod 130.

[0042] In a preferred embodiment, a valve core assembly 170 is provided at the bottom of the ball head rod 130. When the valve core assembly 170 is detached from the filling port 101, the filling body 100 is in the rough filling state. When the valve core assembly 170 closes the filling port 101, the filling body 100 is in the closed state.

[0043] Among them, Figure 2-Figure 4As shown, the valve core assembly 170 is of a truncated cone type, and the grease in the filling cavity 120 flows along the outer wall of the valve core assembly 170 to the filling port 101, thereby improving the stability of the flow rate; optionally, the outer hollow structure at the bottom of the valve core assembly 170 is used to cut off the filling oil column when closing the valve, thereby eliminating the dripping phenomenon after the grease is filled.

[0044] In a preferred embodiment, the filling chamber 120 includes, in sequence from a first direction, a first filling chamber close to the reflux chamber 110 and a truncated cone-shaped second filling chamber 104 close to the filling port 101, the cross-sectional area of ​​the first filling chamber and the second filling chamber 104 at the junction is the same, and the cross-sectional area of ​​the second filling chamber 104 gradually decreases along the first direction from the reflux chamber 110 to the filling port 101; when the filling body 100 is in the rough filling state, the bottom of the valve core assembly 170 is placed in the first filling chamber; the filling body 100 also has a fine filling state, and when in the fine filling state, the bottom of the valve core assembly 170 is placed in the second filling chamber 104; the driving assembly 400 can drive the filling body 100 to switch between the rough filling state, the closed state and the fine filling state.

[0045] like Figure 3 As shown, the bottom inner wall of the filling shell is provided with a circle of protrusions to form a truncated cone-shaped second filling cavity 104. When the filling body 100 is in the rough filling state, the space between the valve core assembly 170 and the protrusions is larger, and the flow rate of the grease from the filling cavity 120 to the filling port 101 is higher. Optionally, when the valve core assembly 170 is lifted up by 20 mm and separated from the filling port 101, the filling body 100 is in the rough filling state; Figure 4 As shown, when the filling body 100 is in the fine filling state, the valve core assembly 170 is relatively close to the protrusion, and the flow rate of the grease is reduced. Optionally, when the valve core assembly 170 is lifted up less than 10 mm and separated from the filling port 101, the filling body 100 is in the fine filling state; in addition, when the filling body 100 is in the fine filling state, the height of the spherical portion 131 is relatively higher than when the filling body 100 is in the closed state, and the flow rate of the reflux from the filling cavity 120 to the reflux cavity 110 is relatively low. The filling body 100 is in the fine filling state to improve the accuracy of filling.

[0046] Furthermore, if Figure 2-Figure 4As shown, the lower part of the protrusion 103 is an inclined surface, and the inner diameter of the space formed by the inclined surface increases gradually from top to bottom. During filling, when switching from the closed state to the rough filling state, the ball head rod 130 moves upward until the spherical part 131 is stuck between the protrusions 103, thereby isolating the filling cavity 120 from the reflux cavity 110; when switching from the rough filling state to the fine filling state, the ball head rod 130 moves slightly downward, the spherical part 131 and the protrusion 103 are separated, and the filling cavity 120 and the reflux cavity 110 are separated. The filling cavity 120 and the reflux cavity 110 are connected, and part of the grease in the filling cavity 120 can flow back into the reflux cavity 110; when the fine filling state is switched to the closed state, the ball head rod 130 continues to move downward, and the distance between the spherical part 131 and the raised part 103 becomes larger and larger until the filling cavity 120 and the reflux cavity 110 are completely connected, and under the action of pressure, all the grease in the filling cavity 120 can flow back into the reflux cavity 110.

[0047] In a preferred embodiment, a plurality of guide members 171 are distributed in an array in the circumferential direction on the outer wall of the valve core assembly 170 , and the ends of the guide members 171 away from the valve core assembly 170 abut against the inner wall of the filling body 100 .

[0048] Alternatively, if Figure 2 As shown, there are three guide members 171, and the three guide members 171 can ensure that the valve core assembly 170 is always centered.

[0049] In a preferred embodiment, the driving assembly 400 includes a first pneumatic assembly and a second pneumatic assembly arranged along the first direction, the first pneumatic assembly includes an upper cylinder 410, the upper cylinder 410 has an upper air chamber 420, and the upper air chamber 420 is provided with an upper piston 430 that can move along the first direction; the second pneumatic assembly includes a lower cylinder 440, the lower cylinder 440 has a lower air chamber 450, and the lower air chamber 450 is provided with a lower piston 460 that can move along the first direction, and the lower piston 460 is connected to the ball head rod 130 away from the upper piston 430; the driving assembly 400 has a first state, a second state and a third state, when When in the first state, the upper piston 430 and the lower piston 460 are respectively at the top of the upper air chamber 420 and the lower air chamber 450, and the bottom end of the valve core assembly 170 is placed in the first filling cavity; when in the second state, the upper piston 430 is placed in the middle of the upper air chamber 420, and the lower piston 460 is placed in the middle of the lower air chamber 450, and the bottom end of the valve core assembly 170 is placed in the second filling cavity 104; when in the third state, the upper piston 430 and the lower piston are respectively placed in the middle of the upper air chamber 420 and the bottom of the lower air chamber 450, and the valve core assembly 170 closes the filling port 101.

[0050] Among them, Figure 7 The first state is shown, at which the top end of the lower piston 460 abuts against the bottom end of the upper piston 430; the distance from the top to the middle of the upper piston 430 is set as the first distance, when the upper piston 430 moves downward by the first distance, the lower piston 460 is driven to move the first distance, so that the lower piston 460 is placed in the middle of the lower air chamber 450, and the driving component is switched to the second state, as shown in FIG. Figure 8 as shown; Fig. 9 As shown, the driving component is in the third state.

[0051] In a preferred embodiment, the upper piston 430 includes a first transverse portion 431, and the upper air chamber 420 includes a first upper air chamber 421 and a second upper air chamber 422 disposed on both sides of the first transverse portion 431 along the first direction; the lower piston 460 includes a second transverse portion 461, and the lower air chamber 450 includes a first lower air chamber 451 and a second lower air chamber 452 disposed on both sides of the second transverse portion 461 along the first direction; the upper cylinder 410 is provided with a first air port 4211 communicating with the first upper air chamber 421 and a second air port 4221 communicating with the second upper air chamber 422; the lower cylinder 440 is provided with a third air port 4511 communicating with the first lower air chamber 451, and a fourth air port 4521 communicating with the second lower air chamber 452.

[0052] Optionally, the air intake of the air source is controlled by a single solenoid valve, and the air source is (0.5-0.8) MPa; the single solenoid valve can only control the piston to be at the top or bottom of the air chamber, and cannot control the piston to be at a specified middle position, so the two cylinders in this solution are used to cooperate to achieve the lower piston 460 in the middle position, and fine filling is achieved. Optionally, the air intake pressure of the lower piston 460 is 0.35 MPa, and the air intake pressure of the upper piston 430 is 0.5-0.65 MPa.

[0053] like Figure 7 As shown, when the filling body 100 switches from the closed state to the rough filling state, the gas source enters the second lower air chamber 452 from the fourth air port 4521, pushing the lower piston 460 to drive the upper piston 430 to move upward until the upper piston reaches the top of the upper air chamber and the lower piston reaches the top of the lower air chamber, the gas in the first lower air chamber 451 is discharged from the third air port 4511, the gas in the first upper air chamber 421 is discharged from the first air port 4211, and the second upper air chamber 422 takes in air through the second air port 4221; Figure 8 As shown, when the filling body 100 switches from the rough filling state to the fine filling state, the gas source enters the first upper air chamber 421 from the first air port 4211, pushing the upper piston 430 to the middle of the upper air chamber, and the lower piston is in the middle of the lower air chamber, the gas in the second upper air chamber 422 is discharged from the second air port 4221, and the lower air chamber 450 is in a pressure-maintaining state to prevent the lower piston 460 from falling. When the lower piston 460 moves downward, the first lower air chamber 451 is inhaled by the third air port 4511, and the gas in the second lower air chamber 452 is discharged from the fourth air port 4521; Fig. 9 As shown, when the filling body 100 switches from the fine filling state to the closed state, the position of the upper piston 430 remains unchanged, the air source is sucked in from the third air port 4511, pushing the lower piston 460 to drive the ball head rod 130 to continue to move downward, and the gas in the second lower air chamber 452 is discharged from the fourth air port 4521.

[0054] In a preferred embodiment, a connecting seat is provided between the upper cylinder 410 and the lower cylinder 440, and a first through hole connecting the second upper air chamber 422 and the first lower air chamber 451 is provided in the middle of the connecting seat, and the axial direction of the first through hole is the first direction, and a first vertical portion 462 is provided on the side of the second transverse portion 461 close to the first transverse portion 431, and the first vertical portion 462 is placed in the first through hole, and when the filling body 100 is switched from the closed state to the rough filling state, the first vertical portion 462 pushes the first transverse portion 431 to move along the first direction.

[0055] like Figure 7-Figure 9 As shown, when the filling body 100 switches from the closed state to the rough filling state, the first vertical portion 462 moves upward in the first through hole, and the first vertical portion 462 abuts against the bottom of the first transverse portion 431. Therefore, when the first upper air chamber 421 takes in air, the first transverse portion 431 can be pushed to drive the first vertical portion and the second transverse portion 461 to move downward, thereby realizing fine filling.

[0056] Among them, the top of the upper cylinder 410 is provided with an upper cover 480, and the top of the upper cover 480 is provided with a pressure cover 481, and the upper cover 480 and the pressure cover 481 can be fixedly connected by bolts, and the bottom of the lower cylinder 440 is provided with a lower cover 482, and the lower cover 482 is fixedly connected to the filling body 100, and a second through hole is provided through the pressure cover 482 and the upper cover 481, and a third through hole is provided in the middle of the lower cover 481; the upper piston 430 has a second vertical portion 432, and the second vertical portion 432 is placed in the second through hole and can move up and down; the lower piston 460 is cross-shaped, including the second transverse portion 461, and the first vertical portion 462 and the third vertical portion 463 provided on both sides of the second transverse portion 461, the first vertical portion 462 is placed in the first through hole, and the third vertical portion 463 is placed in the third through hole, and the third vertical portion 463 is connected to the ball head rod 130 through the connecting rod head 470.

[0057] In a preferred embodiment, a fine filling adjustment component 490 is provided at the end of the first pneumatic component away from the second pneumatic component for adjusting the moving distance of the upper piston.

[0058] like Figure 7-Figure 9 As shown, the top of the pressure cover 482 is provided with a pressure plate, and the top of the second vertical portion 432 is provided with a screw, which passes through the middle of the pressure cover 482 and the pressure plate, and the fine filling adjustment assembly 490 is an adjusting nut arranged at the top of the screw and threadedly connected thereto. When the adjusting nut is rotated, the moving distance of the upper piston 430 can be adjusted, that is, when the filling body 100 is in the fine filling state, the gap between the valve core assembly 170 and the bottom protrusion can be adjusted, thereby controlling the flow rate.

[0059] like Figure 5As shown, the filling device further includes a control panel 700, through which parameters such as rough filling weight, fine filling weight, ball head rod 130 rising speed, filling completion height, etc. can be set. During filling, an empty filling barrel 580 is placed on the weighing conveyor 520, with the barrel mouth aligned with the filling port 101, and the filling body 100 is driven by the servo motor 570 to descend a certain distance from the barrel bottom of the filling barrel 580, and the filling body 100 is switched to the rough filling state. When the set rough filling weight is reached, the filling body 100 is switched to the fine filling state. When the set filling weight is reached, the filling is stopped and the filling body 100 is switched to the closed state; the filling body 100 is raised to a set height by the servo motor 570, the barrel cover of the filling barrel 580 is covered, and it is pushed into the non-powered conveyor 530 and sent out through the lower barrel slope 590.

[0060] The above description is only a preferred embodiment of the present application and an explanation of the technical principles used. Those skilled in the art should understand that the scope of the invention involved in the present application is not limited to the technical solution formed by a specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the inventive concept. For example, the above features are replaced with (but not limited to) technical features with similar functions disclosed in the present application.

Claims

1. A grease filling device, characterized in that: include: A filling body (100), the filling body (100) comprising a filling shell (102), a reflux cavity (110) and a filling cavity (120) being arranged in the filling shell (102) along a first direction, and a filling port (101) communicating with the filling cavity (120) being provided at the bottom of the filling body (100); An oil delivery assembly, the oil delivery assembly comprising an oil inlet pipe (200) in communication with the filling cavity (120), and an oil return pipe (300) in communication with the return cavity (110); The filling body (100) has a rough filling state and a closed state. When in the rough filling state, the reflux chamber (110) and the filling chamber (120) are isolated, the filling port (101) is opened, and the grease in the oil inlet pipe (200) is discharged through the filling port (101) to achieve filling. When in the closed state, the reflux chamber (110) and the filling chamber (120) are connected, the filling port (101) is closed, and the grease in the filling chamber (120) flows back to the reflux chamber (110) and is discharged through the oil return pipe (300). A drive assembly (400) is used to drive the filling body (100) to switch between the rough filling state and the closed state.

2. The grease filling device according to claim 1, characterized in that: The inner wall of the filling shell (102) is provided with a circle of raised portions (103), and the reflux cavity (110) and the filling cavity (120) are located on both sides of the raised portion (103); a ball head rod (130) is provided through the reflux cavity (110) and the filling cavity (120), the axial direction of the ball head rod (130) is the first direction, and a spherical portion (131) is provided in the middle of the ball head rod (130); the driving component (400) can drive the ball head rod (130) to move along the first direction to drive the spherical portion (131) to be in close contact with the raised portion (103) or to be separated from the raised portion (103), so that the filling body (100) can be switched between the closed state and the rough filling state.

3. The grease filling device according to claim 2, characterized in that: A valve core assembly (170) is provided at the bottom of the ball head rod (130); when the valve core assembly (170) is separated from the filling port (101), the filling body (100) is in the rough filling state; when the valve core assembly (170) closes the filling port (101), the filling body (100) is in the closed state.

4. The grease filling device according to claim 3, characterized in that: The filling cavity (120) comprises, in order from a first direction, a first filling cavity close to the reflux cavity (110) and a truncated cone-shaped second filling cavity (104) close to the filling port (101); the cross-sectional areas of the first filling cavity and the second filling cavity (104) at the junction are the same, and the cross-sectional area of ​​the second filling cavity (104) gradually decreases from the reflux cavity (110) to the filling port (101) along the first direction; when the filling body (100) is in the rough filling state, the bottom of the valve core assembly (170) is placed in the first filling cavity; the filling body (100) also has a fine filling state, and when in the fine filling state, the bottom of the valve core assembly (170) is placed in the second filling cavity (104); the driving assembly (400) can drive the filling body (100) to switch between the rough filling state, the closed state and the fine filling state.

5. The grease filling device according to claim 4, characterized in that: A plurality of guide members (171) are distributed in a circumferential direction on the outer wall of the valve core assembly (170), and the ends of the guide members (171) away from the valve core assembly (170) abut against the inner wall of the filling shell (102).

6. The grease filling device according to claim 4, characterized in that: The driving assembly (400) comprises a first pneumatic assembly and a second pneumatic assembly arranged along the first direction, wherein the first pneumatic assembly comprises an upper cylinder (410), wherein an upper air chamber (420) is provided in the upper cylinder (410), wherein an upper piston (430) movable along the first direction is provided in the upper air chamber (420); the second pneumatic assembly comprises a lower cylinder (440), wherein the lower cylinder (440) comprises a lower air chamber (450), wherein a lower piston (460) movable along the first direction is provided in the lower air chamber (450), wherein the lower piston (460) is connected to the ball head rod (130) at an end away from the upper piston (430); the driving assembly (400) has a first state, a second state and a third state, and when in the first state , the upper piston (430) and the lower piston (460) are respectively located at the top of the upper air chamber (420) and the lower air chamber (450), and the bottom end of the valve core assembly (170) is located in the first filling cavity; when in the second state, the upper piston (430) is located in the middle of the upper air chamber (420), and the lower piston (460) is located in the middle of the lower air chamber (450), and the bottom end of the valve core assembly (170) is located in the second filling cavity (104); when in the third state, the upper piston (430) and the lower piston (460) are respectively located in the middle of the upper air chamber (420) and the bottom of the lower air chamber (450), and the valve core assembly (170) closes the filling port (101).

7. The grease filling device according to claim 6, characterized in that: The upper piston (430) comprises a first transverse portion (431), and the upper air chamber (420) comprises a first upper air chamber (421) and a second upper air chamber (422) disposed on both sides of the first transverse portion (431) along the first direction; the lower piston (460) comprises a second transverse portion (461), and the lower air chamber (450) comprises a first lower air chamber (451) and a second lower air chamber (452) disposed on both sides of the second transverse portion (461) along the first direction; the upper cylinder barrel (410) is provided with a first air port (4211) communicating with the first upper air chamber (421) and a second air port (4221) communicating with the second upper air chamber (422); the lower cylinder barrel (440) is provided with a third air port (4511) communicating with the first lower air chamber (451), and a fourth air port (4521) communicating with the second lower air chamber (452).

8. The grease filling device according to claim 7, characterized in that: A connecting seat is provided between the upper cylinder (410) and the lower cylinder (440), and a first through hole is provided in the middle of the connecting seat, which is connected with the second upper air chamber (422) and the first lower air chamber (451), and the axial direction of the first through hole is the first direction. A first vertical portion (462) is provided on the side of the second transverse portion (461) close to the first transverse portion (431), and the first vertical portion (462) is disposed in the first through hole.

9. The grease filling device according to claim 6, characterized in that: A fine filling adjustment component (490) is provided at the end of the first pneumatic component away from the second pneumatic component, for adjusting the moving distance of the upper piston.

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