Pneumatic grease injection lubricating cylinder convenient for oiling

Abstract

The utility model discloses a pneumatic grease injection lubricating cylinder convenient for oiling, which relates to the technical field of pneumatic grease injection lubricating cylinders, and comprises an oil cylinder, the oil cylinder is connected with a one-way valve, a liquid adding pipe is provided with a filter plate, a fixed pipe is fixedly provided with a spring, a connecting disc is connected with a plunger, a connecting rod is hinged with a connecting shaft and a hinged support, and an inclined plate is fixed on the inner wall of the oil cylinder; when oil is added into the oil cylinder, the needle valve and the valve are closed, the protective cover is unscrewed, an external oil pipe and a liquid adding pipe are connected and enter the oil cylinder, oil pressure pushes the piston to move upwards to enable the upper air pressure to be increased and larger than external air pressure, pressure enters the fixed pipe through the pressure discharging hole to apply pressure to the plunger to enable the plunger to move outwards to be separated from the fixed pipe, and the air pressure above the piston is discharged from the fixed pipe. When the piston is in contact with the limiting ring, oil adding is completed, an external oil pipe is taken down, and a protective cover is covered; the problem that oiling is troublesome is solved, and the problems that the lubricating effect is poor and abrasion in the cylinder body is accelerated due to the fact that impurities or dust enter the cylinder body are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of pneumatic grease injection lubrication cylinders, in particular to a pneumatic grease injection lubrication cylinder which is convenient for refueling. Background Art

[0002] Pneumatic grease-injected lubrication cylinder, also known as cylinder grease, is a lubrication device used in pneumatic systems. Its main function is to provide lubrication for the cylinder, prevent internal corrosion, delay the aging of the sealing ring, and ensure the smooth operation of the pneumatic system. It is not only suitable for ordinary cylinders, but also can be used for the lubrication of pneumatic valves, sliding bearings and other components to ensure long-term lubrication of these components in a wide temperature range. The use and maintenance of cylinder grease can significantly improve the working efficiency of pneumatic equipment and extend its service life.

[0003] Chinese patent CN219045701U discloses a pneumatic grease pump, which includes an oil suction pump, a switch and a controller. The oil suction pump is provided with an air inlet, and an air storage bin is provided inside the oil suction pump. The air inlet is connected to the air storage bin, and the air inlet is used to be connected to an air source. A pneumatic piston is provided inside the air storage bin, and the pneumatic piston is slidably connected to the side wall of the air storage bin. The switch is installed at the air inlet, and the switch is electrically connected to the controller. The controller is electrically connected to a timing module, and the timing module is used to output a time signal at a preset time. The controller is used to receive the time signal and control the switch to open or close the air inlet. The application has the following effects: when filling grease to the lubrication equipment, the operator does not need to wait next to the pneumatic grease pump, thereby reducing labor costs.

[0004] In the above patent, after the liquid in the oil barrel is used up, it is necessary to unscrew the screws to remove the barrel cover and the oil suction pump on the barrel cover, and then add oil to the oil barrel. The method of taking and placing the barrel cover back and forth is rather troublesome. At the same time, the removed barrel cover, oil suction pump and barrel body will be exposed to the air, and there is a risk of introducing impurities or dust, which will affect the lubrication effect and accelerate the wear inside the cylinder body. Utility Model Content

[0005] The utility model aims to provide a pneumatic grease injection lubrication cylinder which is convenient for oiling, so as to solve the problems raised in the above-mentioned background technology.

[0006] In order to solve the above technical problems, the utility model provides the following technical solutions: a pneumatic grease injection lubricating cylinder which is easy to refuel, comprising: an oil cylinder, one side of the lower end of the oil cylinder is vertically fixed and penetrated by a one-way valve, the lower end of the one-way valve is vertically fixed and penetrated by a liquid filling pipe, the inner wall of the lower end of the liquid filling pipe is installed with a filter plate, the outer wall of the upper end of the oil cylinder is horizontally fixed with a fixed pipe, a spring is horizontally fixed to an end wall of the fixed pipe away from the oil cylinder, a connecting plate is fixed to the other end of the spring, a plug column movably connected to the inner wall of the fixed pipe and a guide shaft slidably connected to the fixed pipe are horizontally fixed to one side wall of the connecting plate, a connecting shaft located in the fixed pipe is horizontally fixed to the center of one end wall of the plug column, an end of the connecting shaft away from the plug column is hinged with a connecting rod located in the oil cylinder, the connecting rod is horizontally hinged with a hinge seat slidably connected to a fixed frame, the fixed frame and the top surface of the piston are fixedly connected, and an inclined plate located directly above the connecting shaft is fixed to the inner wall of the oil cylinder.

[0007] Furthermore, a fixing plate is fixed to the upper end wall of the oil cylinder, a cylinder head is fixedly installed with bolts on the top surface of the fixing plate, a four-way valve is vertically fixed and connected to the cylinder head, a pressure gauge is fixed to the upper end of the four-way valve, an air intake pipe is fixed to the right end of the four-way valve, and a liquid outlet pipe is vertically fixed to the right side of the lower end of the oil cylinder.

[0008] Furthermore, the one-way valve is located on the left side of the liquid outlet pipe, and the outer wall of the lower end of the liquid adding pipe is threadedly connected with a protective cover, which is sleeved on the outer side of the filter plate.

[0009] Furthermore, a pressure relief hole is horizontally opened at the upper end of the oil cylinder and is intersected with the fixed pipe. The diameter of the pressure relief hole is equal to the inner diameter of the fixed pipe, and the diameter of the connecting shaft is smaller than the diameter of the pressure relief hole.

[0010] Furthermore, there are four springs, which are 90 degrees apart and located outside the plug, and there are four guide shafts, which are 90 degrees apart. The springs and guide shafts correspond one to one and the springs are sleeved on the outside of the guide shafts.

[0011] Furthermore, a piston is slidably connected to the inner wall of the oil cylinder, a limiting ring located above the piston is fixedly connected to the inner wall of the oil cylinder, and the limiting ring is located below the pressure relief hole.

[0012] Furthermore, the cross section of the fixed frame is in a circular shape, and the front and rear plates of the fixed frame are horizontally provided with sliding grooves slidably connected to the sliders, and the sliders are fixedly connected to the front and rear walls of the hinge seat respectively.

[0013] Compared with the prior art, the beneficial effects achieved by the utility model are:

[0014] 1. The utility model stops charging gas from the air inlet pipe when adding oil to the oil cylinder, closes the needle valve on the air inlet pipe, closes the valve on the liquid outlet pipe, unscrews the protective cover, and uses an external oil pipe to connect the liquid filling pipe. The oil flows through the filter plate in the liquid filling pipe to the one-way valve and enters the oil cylinder, that is, below the piston. During the refueling process, the oil pressure pushes the piston upward. During the upward movement, the gas pressure above the piston increases and is greater than the gas pressure outside the oil cylinder. The pressure enters the fixed pipe through the pressure discharge hole. The gas pressure exerts pressure on the plug to move the plug outward. While the piston drives the fixed frame to move upward, the fixed frame moves upward. The hinge seat makes the connecting rod and the connecting shaft tend to move to the right. Under the action of air pressure and the upward movement of the piston, the plug is separated from the fixed tube, and the plug stretches the spring through the connecting plate. At the same time, the connecting plate makes the guide shaft slide on the fixed tube. The air pressure above the piston is discharged from the fixed tube. When the piston contacts the limit ring, the oil is added. The external oil pipe is removed and the protective cover is covered. When the air pressure above the piston is stable, the plug and the fixed tube are connected through the connecting plate under the tension between the springs themselves. The problem of troublesome refueling is solved, and the problem of impurities or dust entering the cylinder body, resulting in poor lubrication effect and accelerated wear inside the cylinder body, is avoided.

[0015] 2. When the hinge seat moves in the fixed frame, the hinge seat drives the slider to slide in the slide groove. The setting of the slider and the slide groove can make the hinge seat and the fixed frame form a whole, so that the hinge seat can move stably. By setting a protective cover and a threaded connection with the liquid filling pipe, the filter plate can be protected, and dust and particles can be prevented from adhering to the filter plate when no oil is added from the liquid filling pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0017] Figure 1 It is a front structural schematic diagram of the utility model;

[0018] Figure 2 This utility model Figure 1 A schematic diagram of the enlarged structure of the middle A area;

[0019] Figure 3 This is a schematic diagram of the internal structure of the oil cylinder of the utility model;

[0020] Figure 4 This utility model Figure 3 A schematic diagram of the structure of the middle B region;

[0021] Figure 5 This utility model Figure 3 A magnified schematic diagram of the structure of the middle C region;

[0022] In the figure: 1. oil cylinder; 2. fixing plate; 3. cylinder head; 4. four-way valve; 5. air inlet pipe; 6. pressure gauge; 7. liquid outlet pipe; 8. liquid filling pipe; 9. one-way valve; 10. protective cover; 11. filter plate; 12. tilting plate; 13. connecting shaft; 14. limiting ring; 15. connecting rod; 16. fixing frame; 17. slide groove; 18. piston; 19. pressure relief hole; 20. fixing pipe; 21. guide shaft; 22. plug; 23. connecting plate; 24. spring; 25. hinge seat; 26. slider. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] See also Figure 1-Figure 5The utility model provides a technical solution: a pneumatic grease injection lubrication cylinder that is easy to refuel, comprising: an oil cylinder 1, a fixing plate 2 is fixed to the upper end wall of the oil cylinder 1, a cylinder cover 3 is fixedly installed with bolts on the top surface of the fixing plate 2, a four-way valve 4 is vertically fixed and connected to the cylinder cover 3, a pressure gauge 6 is fixedly installed on the upper end of the four-way valve 4, an air inlet pipe 5 is fixedly installed on the right end of the four-way valve 4, a liquid outlet pipe 7 is vertically fixedly installed on the right side of the lower end of the oil cylinder 1, a one-way valve 9 is vertically fixed and connected to the lower end of the oil cylinder 1, the oil in the oil cylinder 1 cannot flow out from the one-way valve 9, a liquid adding pipe 8 is vertically fixedly installed on the lower end of the one-way valve 9, and a filter plate 11 is installed on the inner wall of the lower end of the liquid adding pipe 8 to prevent dust and impurities from entering the oil cylinder 1. The valve 9 is located on the left side of the liquid outlet pipe 7. The outer wall of the lower end of the liquid adding pipe 8 is threadedly connected with a protective cover 10, which plays a further protective role. The protective cover 10 is sleeved on the outer side of the filter plate 11. The outer wall of the upper end of the oil cylinder 1 is horizontally fixed with a fixed pipe 20, and a spring 24 is horizontally fixed to the end wall of the fixed pipe 20 away from the oil cylinder 1. A connecting plate 23 is fixed to the other end of the spring 24. A plug 22 movably connected to the inner wall of the fixed pipe 20 and a guide shaft 21 slidably connected to the fixed pipe 20 are horizontally fixed to one side wall of the connecting plate 23. There are four springs 24, which are 90 degrees apart and located outside the plug 22. There are four guide shafts 21, which are 90 degrees apart. The springs 24 and the guide shafts 21 correspond to each other one by one and are elastic. The spring 24 is sleeved on the outside of the guide shaft 21, and a connecting shaft 13 located in the fixed tube 20 is horizontally fixed at the center of one end wall of the piston 22. A pressure relief hole 19 is horizontally opened at the upper end of the oil cylinder 1 and is inserted into the fixed tube 20. The diameter of the pressure relief hole 19 is equal to the inner diameter of the fixed tube 20. The diameter of the connecting shaft 13 is smaller than the diameter of the pressure relief hole 19. The end of the connecting shaft 13 away from the piston 22 is hinged with a connecting rod 15 located in the oil cylinder 1. The connecting rod 15 is horizontally hinged with a hinge seat 25 slidably connected to the fixed frame 16. The fixed frame 16 is fixedly connected to the top surface of the piston 18. The cross section of the fixed frame 16 is a circular shape. The front and rear plates of the fixed frame 16 are horizontally opened with a slide groove 17 slidably connected to the slider 26. The slider 26 is fixedly connected to the front and rear walls of the hinge seat 25 respectively, the inner wall of the cylinder 1 is slidably connected to the piston 18, the inner wall of the cylinder 1 is fixedly connected to the limit ring 14 located above the piston 18, the limit ring 14 prevents the piston 18 from moving upward excessively, and the limit ring 14 is located below the pressure relief hole 19, the inner wall of the cylinder 1 is fixed with an inclined plate 12 located just above the connecting shaft 13, the setting of the inclined plate 12 can, when adding gas, the air pressure at the upper end of the cylinder 1 can push the piston 18 first, the downward movement of the piston 18 can drive the fixed frame 16 to make the connecting rod 15 have a tendency to move the connecting shaft 13 to the left, under the action of the inclined plate 12 and the downward movement of the piston 18, the plug 22 can be prevented from being pushed away by the air pressure.

[0025] Working principle of this utility model:

[0026] Refer to the instruction manual Figure 1-5When the oil cylinder 1 is used, the valve on the liquid outlet pipe 7 (not marked in the figure) is opened, the needle valve on the air inlet pipe 5 (not marked in the figure) is opened, and gas is added through the air inlet pipe 5. The gas enters the oil cylinder 1 through the four-way valve 4, so that the pressure in the oil cylinder 1 increases. Under the action of the inclined plate 12, the air pressure will not make the plug 22 move. The air pressure will make the piston 18 slide downward in the oil cylinder 1 to discharge the oil in the oil cylinder 1 from the liquid outlet pipe 7. The piston 18 drives the fixed frame 16 to move downward. Since the plug 22 is in a stable state, the connecting shaft 13 on the plug 22 is in a fixed state, and the fixed frame 16 moves downward to make the hinge The seat 25 drives the slider 26 to slide rightward in the slide groove 17, and the hinge seat 25 makes the connecting rod 15 rotate around the connecting shaft 13. At the same time, the connecting rod 15 has a tendency to move the connecting shaft 13 to the left. When the piston 18 contacts the lower inner wall of the oil cylinder 1, the oil is used up. At this time, the connecting rod 15 is in a vertical state; when adding oil to the oil cylinder 1, stop filling the gas from the air inlet pipe 5, close the needle valve on the air inlet pipe 5, close the valve on the liquid outlet pipe 7, unscrew the protective cover 10, and connect the external oil pipe and the liquid adding pipe 8 by using the filter plate 11. The oil flows in the liquid adding pipe 8 to the one-way valve 9 and enters In the oil cylinder 1, that is, below the piston 18, during the refueling process, the oil pressure pushes the piston 18 upward. During the upward movement, since the gas pressure above the piston 18 increases and is greater than the gas pressure outside the oil cylinder 1, the pressure enters the fixed pipe 20 through the pressure relief hole 19, and the gas pressure exerts pressure on the plug 22 to move the plug 22 outward. While the piston 18 drives the fixed frame 16 to move upward, the fixed frame 16 makes the connecting rod 15 and the connecting shaft 13 have a tendency to move to the right through the hinge seat 25. Under the upward action of the gas pressure and the piston 18, the plug 22 is separated from the fixed pipe 20, and the plug 2 The spring 24 is stretched through the connecting plate 23, and the connecting plate 23 makes the guide shaft 21 slide on the fixed tube 20, and the air pressure above the piston 18 is discharged from the fixed tube 20. When the piston 18 contacts the limit ring 14, the oil addition is completed, the external oil pipe is removed, and the protective cover 10 is covered. When the air pressure above the piston 18 is stable, the plug 22 and the fixed tube 20 are connected through the connecting plate 23 under the tension between the springs 24 themselves; the problem of troublesome oil filling is solved, and the problem of impurities or dust entering the cylinder body, resulting in poor lubrication effect and accelerated wear inside the cylinder body, is avoided.

[0027] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. Pneumatic grease injection lubrication cylinder for easy refueling, including: The oil cylinder (1) is characterized in that: a one-way valve (9) is vertically fixedly connected to the lower end of the oil cylinder (1); a liquid adding pipe (8) is vertically fixedly connected to the lower end of the one-way valve (9); a filter plate (11) is installed on the inner wall of the lower end of the liquid adding pipe (8); a fixed pipe (20) is horizontally fixedly connected to the outer wall of the upper end of the oil cylinder (1); a spring (24) is horizontally fixed to the end wall of the fixed pipe (20) away from the oil cylinder (1); a connecting plate (23) is fixed to the other end of the spring (24); a side wall of the connecting plate (23) is horizontally fixed with a movable connection with the inner wall of the fixed pipe (20) The piston rod (22) and the guide shaft (21) slidably connected to the fixed tube (20), a connecting shaft (13) located in the fixed tube (20) is horizontally fixed at the center of one end wall of the piston rod (22), an end of the connecting shaft (13) away from the piston rod (22) is hinged to a connecting rod (15) located in the oil cylinder (1), the connecting rod (15) is horizontally hinged to a hinge seat (25) slidably connected to the fixed frame (16), the fixed frame (16) and the top surface of the piston (18) are fixedly connected, and an inclined plate (12) located directly above the connecting shaft (13) is fixed to the inner wall of the oil cylinder (1).

2. The pneumatic grease injection lubrication cylinder for easy refueling according to claim 1, characterized in that: A fixing plate (2) is fixed to the upper end wall of the oil cylinder (1), a cylinder cover (3) is fixedly installed on the top surface of the fixing plate (2) by bolts, a four-way valve (4) is vertically fixedly connected to the cylinder cover (3), a pressure gauge (6) is fixedly connected to the upper end of the four-way valve (4), an air intake pipe (5) is fixedly connected to the right end of the four-way valve (4), and a liquid outlet pipe (7) is vertically fixedly connected to the right side of the lower end of the oil cylinder (1).

3. The pneumatic grease injection lubrication cylinder for easy refueling according to claim 2 is characterized in that: The one-way valve (9) is located on the left side of the liquid outlet pipe (7), and the outer wall of the lower end of the liquid adding pipe (8) is threadedly connected with a protective cover (10), and the protective cover (10) is sleeved on the outer side of the filter plate (11).

4. The pneumatic grease injection lubrication cylinder for easy refueling according to claim 1, characterized in that: The upper end of the oil cylinder (1) is horizontally provided with a pressure relief hole (19) which is intersected with the fixed pipe (20) and into which the pressure relief hole (19) is inserted. The diameter of the pressure relief hole (19) is equal to the inner diameter of the fixed pipe (20), and the diameter of the connecting shaft (13) is smaller than the diameter of the pressure relief hole (19).

5. The pneumatic grease injection lubrication cylinder for easy refueling according to claim 1, characterized in that: The springs (24) are provided in four numbers and are spaced 90 degrees apart and are located outside the plug (22); the guide shafts (21) are provided in four numbers and are spaced 90 degrees apart; the springs (24) and the guide shafts (21) correspond one to one and the springs (24) are sleeved on the outside of the guide shafts (21).

6. The pneumatic grease injection lubrication cylinder for easy refueling according to claim 1, characterized in that: The inner wall of the oil cylinder (1) is slidably connected to a piston (18), and the inner wall of the oil cylinder (1) is fixedly connected to a limiting ring (14) located above the piston (18), and the limiting ring (14) is located below the pressure discharge hole (19).

7. The pneumatic grease injection lubrication cylinder for easy refueling according to claim 1, characterized in that: The fixing frame (16) has a circular cross section, and the front and rear plates of the fixing frame (16) are both horizontally provided with sliding grooves (17) slidably connected to the sliding block (26), and the sliding block (26) is fixedly connected to the front and rear walls of the hinge seat (25) respectively.

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