Electric miniature lubricating pump

Abstract

The utility model relates to the field of lubricating pumps, and discloses an electric miniature lubricating pump which comprises an oil outlet plunger unit located in a pump shell and an oil pressing structure located in an oil storage barrel, the oil storage barrel is located on the upper portion of the pump shell, and the oil pressing structure comprises an oil pressing spring, an oil pressing disc supporting rod and an oil pressing disc. The oil outlet plunger unit comprises a plunger body, a valve element, a valve element spring, a valve seat, an oil pressing plunger and a driving spring, an electric heating wire is arranged on the outer side of the oil outlet plunger unit in the pump shell, a waterproof air inlet valve is arranged on the oil storage barrel cover, a moving structure is arranged in the pump shell, and a liquid level travel switch is arranged on one side of the moving structure. The waterproof ventilation valve is arranged on the oil storage barrel cover, when the oil pressing disc works up and down, air pressure difference is certainly generated in the oil storage barrel, the waterproof ventilation valve is opened, no pressure difference exists inside and outside, the oil pressing disc works normally, the pump shell is provided with the electric heater wire, and the aluminum alloy pump shell is heated, so that the flowability of lubricating grease is guaranteed; and abnormal work caused by air suction is avoided.

Description

Technical Field

[0001] The utility model relates to the field of electric lubrication pumps, in particular to an electric micro-lubrication pump. Background Art

[0002] In metallurgy and heavy machinery, electric lubrication pump is an important component, providing lubrication for these equipment. The general electric lubrication pump has a complex structure, a large appearance, and a PLC or relay control cabinet, which has certain requirements for on-site space. When the previous electric lubrication pump is in use, the continuous operation of the oil plate causes a pressure difference between the inside and outside, affecting the operation of the oil plate. When working in some extremely cold areas, the temperature drops, causing the lubricating grease to stick together, making it difficult to discharge oil.

[0003] In the document CN201320417964, a large-capacity electric lubrication pump is disclosed, including an oil tank mounted on a pump bracket, an eccentric wheel assembly, a motor and a plunger subassembly mounted at the bottom of the oil tank, the motor drives the plunger subassembly to reciprocate through the eccentric wheel assembly, an intermediate guide rod is provided at the center of the oil tank, an oil pressure plate that slides up and down is installed on the central guide rod, an oil pressure plate sealing ring is provided between the oil pressure plate and the inner wall of the oil tank, a thrust spring is provided between the oil pressure plate and the top cover of the oil tank along the intermediate guide rod; a grease injection port is provided at the top of the oil tank, and the grease injection port is connected to the oil pressure plate through a spiral grease filling tube. After the oil pressure plate continues to work, this structure will produce a pressure difference between the inside and outside, and the oil pressure plate will produce a large resistance, which is not conducive to the work of the oil pressure plate.

[0004] Therefore, a new technical solution is needed to solve the above technical problems. Summary of the invention

[0005] In order to solve the above problems, the utility model discloses an electric micro lubrication pump, which improves the continuous operation of the oil pressure plate in the lubrication pump, avoids the adhesion of lubricating grease, and maintains the continuity of the operation of the lubrication pump.

[0006] The technical solution of the utility model is: an electric micro-lubrication pump, including an oil outlet plunger unit located in a pump housing, and an oil pressure structure located in an oil storage barrel, the oil storage barrel is located at the upper part of the pump housing, the oil pressure structure includes an oil pressure spring, an oil pressure plate support rod and an oil pressure plate, the oil outlet plunger unit includes a plunger body, a valve core, a valve core spring, a valve seat, an oil pressure plunger and a driving spring, an electric heating wire is provided on the outer side of the oil outlet plunger unit in the pump housing, a waterproof air inlet valve is provided on the oil storage barrel cover, a moving structure is provided in the pump housing, and a liquid level stroke switch is provided on one side of the moving structure.

[0007] By adopting the above technical solution, when the lubricating grease in the oil storage barrel is consumed, the oil pressure plate will continue to move downward, then contact the liquid level stroke switch, and then transmit the signal to the external controller, and then control the motor to stop running.

[0008] An oil storage barrel pull rod is provided outside the oil storage barrel. The upper end of the oil storage barrel pull rod is fixed in the mounting hole of the oil storage barrel cover through the oil storage barrel sealing gasket and is fixed through a cap nut, and the lower end is fixed to the pump housing through the oil storage barrel sealing gasket.

[0009] By adopting the above technical solution, the oil storage barrel pull rod can limit the oil storage barrel between the oil storage barrel cover and the pump housing to prevent the oil storage barrel from being displaced.

[0010] Preferably, the oil pressure plate support rod is located in the middle position of the plastic oil storage barrel, the upper end of the oil pressure plate is fixed on the oil storage barrel cover, and the lower end is located in the through hole in the middle of the oil pressure plate. The end of the oil pressure plate support rod passes through the through hole and is equipped with a nut. The diameter of the nut is larger than the diameter of the through hole. A rubber sealing ring is provided between the oil pressure plate and the oil pressure plate support rod.

[0011] By adopting the above technical solution, when the oil pressure plate moves downward, the oil pressure plate support rod passes through the through hole of the oil pressure plate, and the rubber sealing ring can increase the sealing between the oil pressure plate support rod and the oil pressure plate to prevent oil leakage. The nut can limit the oil pressure plate to prevent the oil pressure plate from moving infinitely downward on the oil pressure plate support rod.

[0012] Preferably, an oil pressure spring is provided around the outer ring of the oil pressure plate support rod, one end of the oil pressure spring abuts against the oil storage barrel cover, and the other end abuts against the oil pressure plate, and an oil pressure plate sealing ring is provided between the side of the oil pressure plate and the oil storage barrel.

[0013] By adopting the above technical solution, the spring can increase the downward force of the oil pressure plate, pressing the oil pressure plate downward until the lubricating oil is consumed. The oil pressure plate sealing ring can increase the sealing performance between the oil pressure plate and the oil storage barrel to prevent the lubricating oil from leaking from the side of the oil pressure plate.

[0014] Preferably, a motion structure is provided in the pump housing between the oil outlet plunger unit and the oil pressure plate, and the motion structure includes a motor, a copper bushing, a copper nut and a spline. A driving wheel is provided on the rotating shaft of the motor through a copper bushing, and a spline is provided in the driving wheel. The spline is connected to the oil pressure plate, and the driving wheel is an eccentric cam.

[0015] Preferably, the oil pressure plate is in the form of an upwardly inclined blade propeller. The oil pressure plate is located in the pump housing cavity below the oil pressure plate to stir the grease and press it toward the plunger oil suction port. The copper nut is used to fix the motor to the pump housing.

[0016] By adopting the above technical solution, the driving wheel is an eccentric cam structure. The rotation of the driving wheel drives the oil outlet plunger unit to perform piston-like movement. The oil outlet plunger unit supplies oil to the outside and delivers it to the lubrication point. The motor drives the copper sleeve to drive the driving wheel, and the driving wheel drives the spline to rotate. The spline finally drives the oil pressure plate to rotate, so that the oil pressure plate stirs the grease and presses it toward the plunger oil suction port.

[0017] Preferably, the oil-pressure plunger is pressed on the outside of the cam circle of the driving wheel, the oil-pressure plunger is located in the inner hole of the plunger body, a plunger body oil suction port is provided on one side of the oil-pressure plunger, a valve core is provided at the lower end of the plunger body, and a conical surface structure at one end of the valve core is sealed with the slope surface of the inner hole of the plunger body, and the center of the bottom of the conical surface is a cylinder.

[0018] By adopting the above technical solution, the cooperation between the oil pressure plunger and the lubricating grease is achieved through the displacement of the oil pressure plunger in the plunger body.

[0019] Preferably, a valve seat is provided at the bottom of the conical surface of the valve core, a valve sealing gasket is provided between the valve seat and the bottom of the conical surface of the valve core, and a valve core spring wound around the valve core cylinder is provided between the valve seat and the adjusting screw.

[0020] Preferably, the adjusting screw is screwed onto the external thread of the valve core via the internal thread, a hole is opened in the middle of the adjusting screw, the valve core spring abuts against the bottom of the adjusting screw opening, and the adjusting screw is screwed onto the internal thread of the inner hole of the plunger body via the external thread.

[0021] By adopting the above technical solution, the valve core spring presses the oil pressure plunger to the outside of the driving wheel, the oil pressure plunger performs piston movement, the piston stretches outward, the lubricating grease enters the oil suction port of the plunger body, the piston is compressed inward, the lubricating grease is discharged outward and transported to the lubrication point, and the valve seat can be threadedly adjusted on the inside of the plunger body to adjust the compression strength of the spring.

[0022] Preferably, the liquid level stroke switch is located on the pump housing below the oil pressure plate, and the liquid level stroke switch and the motor are connected to an external controller.

[0023] By adopting the above technical solution, when the oil pressure plate moves downward, it contacts the liquid level travel switch and then sends a signal to an external controller.

[0024] Advantages of the utility model: 1. The utility model provides a waterproof breathable valve on the oil storage barrel cover. When the oil pressure plate moves up and down, a pressure difference is bound to occur in the oil storage barrel. At this time, by opening the waterproof breathable valve, there is no pressure difference between the inside and outside, thereby ensuring the normal operation of the oil pressure plate.

[0025] 2. The pump housing of the utility model is provided with an electric heater wire, so that when the electric heater is heated, the aluminum alloy pump housing is heated, and the heat is transferred to the grease in the upper chamber through the housing, thereby ensuring the fluidity of the grease, and further ensuring that the oil outlet plunger unit pump unit absorbs oil smoothly, avoiding abnormal operation caused by empty suction.

[0026] 3. The utility model effectively improves the continuous operation of the oil pressure plate in the lubrication pump, avoids the adhesion of lubricating grease, and maintains the continuity of the operation of the lubrication pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the structure of the utility model;

[0028] Figure 2 It is a schematic diagram of the structure of the external side view of the utility model;

[0029] Figure 3 It is a schematic diagram of the structure of the top view of the utility model;

[0030] Figure 4 It is a structural schematic diagram of a three-dimensional diagram of the utility model;

[0031] Figure 5 This is a structural schematic diagram of the oil outlet plunger unit of the utility model;

[0032] Figure 6 This is a structural schematic diagram of the valve core of the utility model;

[0033] Figure 7 It is a structural schematic diagram of the oil-suctioning piston of the oil-discharging plunger unit of the utility model.

[0034] Figure 8 It is a structural schematic diagram of the oil outlet of the piston of the oil outlet plunger unit of the utility model.

[0035] Among them: 1. cap nut, 2. oil storage barrel cover, 3. oil storage barrel sealing gasket, 4. oil storage barrel, 5. oil pressure plate support rod, 5-1, nut, 6. oil pressure spring, 7. oil pressure plate, 7-1, rubber sealing ring, 7-2, through hole, 8. oil pressure plate sealing ring, 9. liquid level stroke switch, 10. oil pressure plate, 11. spline, 12. driving wheel, 13. oil outlet plunger unit, 14. copper bushing, 15. electric heater wire, 16. copper nut, 17. motor, 18. pump housing, 19. waterproof breathable valve, 20. oil storage barrel pull rod, 21. driving spring, 22. oil pressure plunger, 23. valve sealing gasket, 24. valve seat, 25. valve core, 26. valve core spring, 27. adjusting screw, 28. plunger body, 28-1, inner hole, 29. plunger body oil suction port. DETAILED DESCRIPTION

[0036] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0037] like Figure 1-8 As shown, an electric micro-lubrication pump includes an oil outlet plunger unit 13 located in a pump housing 18, and an oil pressure structure located in an oil storage barrel 4, the oil storage barrel 4 is located at the upper part of the pump housing 18, the oil pressure structure includes an oil pressure spring 6, an oil pressure plate support rod 5 and an oil pressure plate 7, the oil outlet plunger unit 13 includes a plunger body 28, a valve core 25, a valve core spring 26, a valve seat 24, an oil pressure plunger 22 and a driving spring 21, an electric heating wire 15 is provided on the outer side of the oil outlet plunger unit 13 in the pump housing 18, a waterproof air inlet valve 19 is provided on the oil storage barrel cover 2, a motion structure is provided in the pump housing 18, and a liquid level stroke switch 9 is provided on one side of the motion structure, when the lubricating grease in the oil storage barrel 4 is consumed, the oil pressure plate 7 will continue to move downward, and then contact the liquid level stroke switch 9, and then transmit the signal to the external controller, and then control the motor 17 to stop running.

[0038] The pump housing 18 is made of aluminum alloy. When the pump housing 19 is cast, an electric heating wire 15 is directly left in the pump housing. In this way, when the electric heating wire 15 is heated, the aluminum alloy pump housing 18 is also heated, and the heat is transferred to the grease in the upper cavity through the housing, thereby ensuring the fluidity of the grease, and further ensuring that the oil outlet plunger unit 13 pump unit can absorb oil smoothly, avoiding abnormal operation caused by empty suction. At the same time, the heat generated by the electric heating wire 15 can ensure that the ambient temperature in the lower cavity of the pump housing 18 and the bottom cover is higher than the minimum operating temperature of the power supply control unit, thereby protecting the LCD type touch screen to work normally even at low temperatures.

[0039] An oil storage barrel tie rod 20 is provided on the outside of the oil storage barrel 4. The upper end of the oil storage barrel tie rod 20 is fixed in the mounting hole of the oil storage barrel cover 2 through the oil storage barrel sealing gasket 3 and is fixed through the cap nut 1, and the lower end is fixed to the pump housing 18 through the oil storage barrel sealing gasket 3. The oil storage barrel tie rod 20 can limit the oil storage barrel 4 between the oil storage barrel cover 2 and the pump housing 18 to prevent the oil storage barrel 4 from being displaced.

[0040] The oil pressure plate support rod 5 is located in the middle position of the plastic oil storage barrel 4. The upper end of the oil pressure plate 7 is fixed on the oil storage barrel cover 2, and the lower end is located in the through hole 7-2 in the middle of the oil pressure plate 7. The end of the oil pressure plate support rod 5 passes through the through hole 7-2 and is equipped with a nut 5-1. The diameter of the nut 5-1 is larger than the diameter of the through hole 7-2. A rubber sealing ring 7-1 is provided between the oil pressure plate 7 and the oil pressure plate support rod 5. When the oil pressure plate 7 moves downward, the oil pressure plate support rod 5 passes through the through hole 7-2 of the oil pressure plate 7. The rubber sealing ring 7-1 can increase the sealing between the oil pressure plate support rod 5 and the oil pressure plate 7 to prevent oil leakage. The nut 5-1 can limit the oil pressure plate 7 to prevent the oil pressure plate 7 from moving infinitely downward on the oil pressure plate support rod 5.

[0041] An oil pressure spring 6 is provided around the outer sleeve of the oil pressure plate support rod 5, one end of the oil pressure spring 6 abuts on the oil storage barrel cover 2, and the other end abuts on the oil pressure plate 7. An oil pressure plate sealing ring 8 is provided between the side of the oil pressure plate 7 and the oil storage barrel 4. The oil pressure spring 6 can increase the downward force of the oil pressure plate 7, pressing the oil pressure plate 7 downward until the lubricating oil is consumed. The oil pressure plate sealing ring 8 can increase the sealing performance between the oil pressure plate 7 and the oil storage barrel 4 to prevent the lubricating oil from leaking out from the side of the oil pressure plate 7.

[0042] There are three oil outlet plunger units 13 in the pump housing, which can be supplemented or merged according to user needs. The oil outlet plunger unit adopts a built-in one-way valve piston bottom suction structure, which is compact in structure, reliable in oil suction, and easy to replace and maintain. A motion structure is provided in the pump housing 18 between the oil outlet plunger unit 13 and the oil pressure plate 7. The motion structure includes a motor 17, a copper shaft sleeve 14, a copper nut 16 and a spline 11. A driving wheel 12 is provided on the rotating shaft of the motor 17 through the copper shaft sleeve 14. A spline 11 is provided in the driving wheel 12. An oil pressure plate 10 is connected to the spline 11. The driving wheel 12 is an eccentric cam, and the oil pressure plate 10 is an upwardly inclined blade In the form of a propeller, the oil pressure plate 10 is located in the cavity of the pump housing 18 below the oil pressure plate 7 to stir the grease and press it toward the plunger oil suction port 29. The copper nut 16 is used to fix the motor 17 to the pump housing 18. The driving wheel 12 is an eccentric cam structure. The rotation of the driving wheel 12 drives the oil outlet plunger unit 13 to perform piston-like movement. The oil outlet plunger unit 13 supplies oil to the outside and delivers it to the lubrication point. The motor 17 drives the copper sleeve 14 to drive the driving wheel 12. The driving wheel 12 drives the spline 11 to rotate. The spline 11 finally drives the oil pressure plate 10 to rotate, so that the oil pressure plate 7 stirs the grease and presses it toward the plunger oil suction port 29.

[0043] The oil pressure plunger 22 is pressed against the outside of the cam circle of the driving wheel 12. The oil pressure plunger 22 is located in the inner hole 28-1 of the plunger body. A plunger body oil suction port 29 is provided on one side of the oil pressure plunger 22. A valve core 25 is provided at the lower end of the plunger body 28. A conical surface structure is provided at one end of the valve core 25, which is sealed with the slope surface of the inner hole of the plunger body 28. The center of the bottom of the conical surface is a column. The displacement of the oil pressure plunger 22 in the plunger body 28 realizes the coordination with the lubricating grease.

[0044] A valve seat 24 is provided at the bottom of the conical surface of the valve core 25, a valve sealing gasket 23 is provided between the valve seat 24 and the bottom of the conical surface of the valve core 25, a valve core spring 26 wound on the column of the valve core 25 is provided between the valve seat 24 and the adjusting screw 27, the adjusting screw 27 is screwed on the external thread of the valve core 25 through an internal thread, the middle part of the adjusting screw 27 is opened, the valve core spring 26 abuts against the bottom of the opening of the adjusting screw 27, the adjusting screw 27 is screwed on the internal thread of the inner hole 28-1 of the plunger body 28 through the external thread, the valve core spring 26 presses the oil pressure plunger 22 to the outside of the driving wheel 12, the oil pressure plunger 22 performs piston movement, the piston stretches outward, the lubricating grease enters the oil suction port 29 of the plunger body, the piston is compressed inward, the lubricating grease is discharged outward and transported to the lubrication point, the valve seat 24 can be threadedly adjusted on the inner side of the plunger body 28 to adjust the compression strength of the spring.

[0045] The liquid level stroke switch 9 is located at the pump housing 18 below the oil pressure plate 7. The liquid level stroke switch 9 and the motor 17 are connected to an external controller. When the oil pressure plate 7 moves downward, it contacts the liquid level stroke switch 9 and then sends a signal to the external controller.

[0046] Working principle: the lubricating grease at the bottom of the oil pressure plate 7 will be pressed down continuously under the action of the oil pressure spring 6. After the lubricating grease is consumed, the oil pressure plate 7 continues to move downward. There is a waterproof and breathable valve 19 on the upper part of the oil storage barrel cover 4, which allows air to enter and exit the oil storage barrel to ensure the flexible up and down movement of the oil pressure plate 7. The oil pressure plate 10 stirs the lubricating grease in the cavity and presses the lubricating grease to the plunger oil suction port 29. The driving spring 21 presses the oil pressure plunger 22 to the outside of the cam circle of the driving wheel 12. The driving wheel 12 rotates, driving the oil pressure plunger 22 to perform piston movement. The piston stretches outward, and the lubricating grease enters the oil suction port of the plunger body 28. The piston is compressed inward, and the lubricating grease is discharged outward and transported to the lubrication point.

[0047] Those skilled in the art should understand that the embodiments of the present invention described above and shown in the accompanying drawings are only examples and do not limit the present invention, and the purpose of the present invention has been fully and effectively achieved. The functions and structural principles of the present invention have been demonstrated and explained in the embodiments, and the implementation methods of the present invention may be deformed or modified in any way without departing from the principles.

Claims

1. An electric micro lubrication pump, comprising an oil outlet plunger unit located in a pump housing, and an oil pressure structure located in an oil storage barrel, wherein the oil storage barrel is located at the upper part of the pump housing, the oil pressure structure comprises an oil pressure spring, an oil pressure plate support rod and an oil pressure plate, the oil outlet plunger unit comprises a plunger body, a valve core, a valve core spring, a valve seat, an oil pressure plunger and a driving spring, characterized in that: An electric heating wire is arranged on the outer side of the oil outlet plunger unit in the pump housing, a waterproof air inlet valve is arranged on the oil storage barrel cover, a moving structure is arranged in the pump housing, and a liquid level travel switch is arranged on one side of the moving structure.

2. The electric micro lubrication pump according to claim 1, characterized in that: An oil storage barrel pull rod is provided outside the oil storage barrel. The upper end of the oil storage barrel pull rod is fixed in the mounting hole of the oil storage barrel cover through an oil storage barrel sealing gasket and is fixed through a cap nut, and the lower end is fixed to the pump housing through the oil storage barrel sealing gasket.

3. The electric micro lubrication pump according to claim 1, characterized in that: The oil pressure plate support rod is located in the middle position of the plastic oil storage barrel. The upper end of the oil pressure plate is fixed on the oil storage barrel cover, and the lower end is located in the through hole in the middle of the oil pressure plate. The end of the oil pressure plate support rod passes through the through hole and is equipped with a nut. The diameter of the nut is larger than the diameter of the through hole. A rubber sealing ring is provided between the oil pressure plate and the oil pressure plate support rod.

4. The electric micro lubrication pump according to claim 1, characterized in that: An oil pressure spring is provided around the outer sleeve of the oil pressure plate support rod, one end of the oil pressure spring abuts against the oil storage barrel cover, and the other end abuts against the oil pressure plate, and an oil pressure plate sealing ring is provided between the side of the oil pressure plate and the oil storage barrel.

5. The electric micro lubrication pump according to claim 1, characterized in that: A motion structure is provided in the pump housing between the oil outlet plunger unit and the oil pressure plate, and the motion structure includes a motor, a copper bushing, a copper nut and a spline. A driving wheel is provided on the rotating shaft of the motor through a copper bushing, and a spline is provided in the driving wheel. An oil pressure plate is connected to the spline, and the driving wheel is an eccentric cam.

6. The electric micro lubrication pump according to claim 5, characterized in that: The oil pressure plate is in the form of an upwardly inclined blade propeller. The oil pressure plate is located in the pump housing cavity below the oil pressure plate to stir the grease and press it toward the plunger oil suction port. The copper nut is used to fix the motor to the pump housing.

7. The electric micro lubrication pump according to claim 1, characterized in that: The oil pressure plunger is pressed on the outside of the driving wheel cam circle, and the oil pressure plunger is located in the inner hole of the plunger body. A plunger body oil suction port is provided on one side of the oil pressure plunger, and a valve core is provided at the lower end of the plunger body. One end of the valve core is in a conical surface structure, which is sealed with the slope surface of the inner hole of the plunger body, and the center of the bottom of the conical surface is a column.

8. The electric micro lubrication pump according to claim 7, characterized in that: A valve seat is arranged at the bottom of the conical surface of the valve core, a valve sealing gasket is arranged between the valve seat and the bottom of the conical surface of the valve core, and a valve core spring wound on the valve core column is arranged between the valve seat and the adjusting screw.

9. The electric micro lubrication pump according to claim 8, characterized in that: The adjusting screw is screwed onto the external thread of the valve core via the internal thread, a hole is opened in the middle of the adjusting screw, the valve core spring abuts against the bottom of the adjusting screw opening, and the adjusting screw is screwed onto the internal thread of the inner hole of the plunger body via the external thread.

10. The electric micro lubrication pump according to claim 1, characterized in that: The liquid level stroke switch is located at the pump housing below the oil pressure plate, and the liquid level stroke switch and the motor are connected to an external controller.

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