Lubricating pump of progressive lubricating system

Abstract

The utility model discloses a lubricating pump of a progressive lubricating system. The lubricating pump comprises a plunger pump component, an electric control board component, a plunger driving component and an oil storage barrel. The plunger pump component comprises a pump body, a plunger and an oil outlet one-way valve, a plunger hole, an oil suction hole and an oil outlet hole are formed in the pump body, one end of the oil suction hole is connected with the inner wall of the plunger hole, the other end of the oil suction hole is connected with the oil storage barrel, and the oil inlet side and the oil outlet side of the oil outlet one-way valve are connected with the plunger hole and the oil outlet hole respectively; the electric control plate component is electrically connected with the plunger driving component, and the plunger driving component is connected with the plunger, so that the electric control plate component controls the plunger driving component to drive the plunger to axially reciprocate along the plunger hole. The utility model not only has large oil output, but also has the advantages of simple structure, reliable work, compact layout and the like.

Description

Technical Field

[0001] This utility model relates to the field of lubrication pump technology, and in particular to a lubrication pump for a progressive lubrication system. Background Technology

[0002] The progressive centralized lubrication system ensures that each lubrication point receives adequate lubrication by distributing lubricating oil in stages. It is suitable for various mechanical equipment and has advantages such as high efficiency, energy saving, and easy maintenance.

[0003] Currently, in progressive centralized lubrication systems, the grease pumps used generally employ a motor that drives an eccentric wheel via a reduction gearbox, which in turn pushes a plunger in a reciprocating motion to supply oil. In practical use, this structure mainly suffers from the drawback of insufficient oil output.

[0004] There are three ways to increase the oil output of an oil pump during design: a. increase the effective stroke of the plunger; b. increase the cross-sectional area of ​​the plunger; c. increase the frequency of plunger action. While maintaining the pump's output pressure, increasing the plunger stroke means increasing the eccentricity of the eccentric wheel. Increasing the eccentricity requires increasing the required motor drive torque, and increasing the plunger cross-sectional area also requires increasing the motor drive torque. Due to limitations in installation space, cost control, and aesthetic requirements, the motor size should not be too large, and a higher-power motor cannot be selected to obtain higher drive torque. Furthermore, excessively high plunger action frequency will reduce the pump's oil suction capacity, resulting in a generally lower oil output for this type of pump.

[0005] Therefore, it is necessary to improve the lubrication pumps in the current progressive lubrication system. Utility Model Content

[0006] The purpose of this invention is to provide a lubrication pump for a progressive lubrication system. This invention not only has a large oil output, but also has the advantages of simple structure, reliable operation and compact layout.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a lubrication pump, including a plunger pump component, an electronic control board component, a plunger drive component, and an oil reservoir;

[0008] The plunger pump component includes a pump body, a plunger, and an oil outlet check valve. The pump body is provided with a plunger hole, an oil suction hole, and an oil outlet hole. One end of the oil suction hole is connected to the inner wall of the plunger hole, and the other end of the oil suction hole is connected to an oil storage tank. The oil inlet side and the oil outlet side of the oil outlet check valve are respectively connected to the plunger hole and the oil outlet hole.

[0009] The electronic control board component is electrically connected to the plunger drive component, and the plunger drive component is connected to the plunger, so that the electronic control board component controls the plunger drive component to drive the plunger to move back and forth along the plunger hole axis.

[0010] By adopting the above technical solution, the electronic control board controls the plunger drive component to drive the plunger to reciprocate within a set range, thereby completing the oil pump's oil suction and discharge functions. The plunger's stroke does not affect the required output torque of the plunger drive component, so a large oil discharge stroke can be designed, resulting in a large oil pump output. Compared with traditional designs, the structure is simple, the operation is reliable, and the layout is compact.

[0011] The present invention is further configured such that the electronic control board component includes a control board and position monitoring switches AS and BS electrically connected to the control board, and a plunger identification point is fixedly connected to the plunger or plunger drive component. During the displacement process, the plunger has a plunger position A located at the push-out limit point and a plunger position B located at the return and open oil suction hole position. The position monitoring switches AS and BS detect the plunger position identification point and send a signal to the control board when the plunger reaches plunger position A and plunger position B, respectively.

[0012] By adopting the above technical solution, the control board controls the plunger drive component to make the plunger continuously and alternately move back and forth between plunger position A and plunger position B, thus completing the continuous oil pump discharge. This achieves the function of controlling the plunger's movement direction and range by monitoring the plunger position signal, thereby completing the oil pump's suction and discharge functions.

[0013] The present invention is further configured such that the plunger driving component includes a motor, a reduction gearbox, a screw, and a screw sleeve. The input end of the reduction gearbox is linked to the motor shaft of the motor. The screw sleeve is threadedly engaged with the screw. The screw is coaxially arranged with the plunger. The output end of the reduction gearbox is connected to the plunger through the engagement structure of the screw and the screw sleeve, for driving the plunger to move axially.

[0014] By adopting the above technical solution, the motor drives the plunger to move linearly along the plunger hole through the gearbox and the screw sleeve and screw transmission structure. Changing the motor's rotation direction changes the transmission direction of the screw sleeve and screw accordingly, thus changing the plunger's movement direction. The electronic control board switches the motor's rotation direction according to the plunger's position, thereby controlling the plunger's reciprocating movement within the corresponding range to meet the plunger's drive requirements. The screw sleeve and plunger should be designed coaxially; non-coaxial designs should be avoided to prevent bending moments and increase the motor load.

[0015] The present invention is further configured such that the screw is connected to the output end of the gearbox, the screw sleeve is connected to the plunger, and the screw sleeve is circumferentially limited by a limiting mechanism, so that when the screw rotates, the screw sleeve drives the plunger to move axially.

[0016] By adopting the above technical solution, it is the first setting method of screw and sleeve transmission structure. The gearbox drives the screw to rotate, and the sleeve moves linearly under the action of the limiting mechanism, and drives the plunger to move back and forth.

[0017] The present invention is further configured such that the screw is connected to the plunger, the screw sleeve is connected to the output end of the gearbox, and the screw sleeve provides axial limiting so that when the screw sleeve rotates, the screw drives the plunger to move axially.

[0018] By adopting the above technical solution, a second configuration of the screw and sleeve transmission structure is achieved. The gearbox drives the sleeve to rotate, the screw to move linearly, and drives the plunger to reciprocate. This shortens the screw cantilever length and improves screw rigidity.

[0019] The present invention is further configured such that the motor and the screw are respectively disposed on both sides of the gearbox.

[0020] By adopting the above technical solution, the motor and screw are set on opposite sides, that is, the input shaft and output shaft of the gearbox are set on opposite sides. In this setting, there are no other parts on the motor mounting side, the gearbox structure is more compact, and the motor is easier to install and maintain.

[0021] The present invention is further configured such that the motor and the screw are both located on the same side of the gearbox.

[0022] By adopting the above technical solution, the motor and screw are set on the same side, that is, the input shaft and output shaft of the gearbox are set on the same side, which can reduce the external size of the oil pump in the direction of piston movement.

[0023] The present invention is further configured such that the position monitoring switch AS and the position monitoring switch BS are independently configured and connected to the control board via signal lines.

[0024] By adopting the above technical solution, the control board design is flexible and not limited by the positioning positions of the monitoring switches AS and BS.

[0025] The present invention is further configured such that the motor is a stepper motor or a servo motor.

[0026] By adopting the above technical solution, the position monitoring switches AS and BS can be eliminated, and the control board can directly position the plunger through a stepper motor or servo motor to complete the oil pump function.

[0027] The present invention is further configured such that the plunger driving component can also be a cylinder driven or a hydraulic cylinder driven.

[0028] By adopting the above technical solution, the plunger can be driven by air pressure or oil pressure.

[0029] The present invention is further configured to include a pressure regulating valve, which is connected to the oil outlet of the pump body.

[0030] By adopting the above technical solution, when the oil pump outlet pressure regulating valve is set to pressure, the overpressure grease overflows back to the oil storage tank through the regulating valve, preventing the oil pump motor from being overloaded; the regulating valve can adjust the maximum oil pump outlet pressure. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the structure of one embodiment of the lubrication pump of this utility model;

[0032] Figure 2 This is a schematic diagram of the structure of the present invention when the plunger is located at plunger position A;

[0033] Figure 3 This is a schematic diagram of the structure of the present invention when the plunger is located at plunger position B;

[0034] Figure 4 This is a schematic diagram of the structure of the first embodiment of the plunger drive component of this utility model;

[0035] Figure 5 This is a schematic diagram of the second embodiment of the plunger drive component of this utility model;

[0036] Figure 6 This is a schematic diagram of the third embodiment of the plunger drive component of this utility model;

[0037] Figure 7 This is a schematic diagram of the fourth embodiment of the plunger drive component of this utility model.

[0038] In the diagram: 1. Plunger pump assembly; 11. Pump body; 12. Plunger; 13. Oil outlet check valve; 14. Plunger orifice; 15. Oil suction port; 17. Oil outlet port; 18. Plunger position identification point; 19. Pressure regulating valve; 2. Electronic control board assembly; 21. Control board; 22. Position monitoring switch AS; 23. Position monitoring switch BS; 3. Plunger drive assembly; 31. Motor; 32. Gearbox; 33. Screw; 34. Screw sleeve; 4. Oil reservoir. Detailed Implementation

[0039] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0040] Example: As attached Figures 1-7 The lubrication pump of the progressive lubrication system shown includes a plunger pump component 1, an electronic control board component 2, a plunger drive component 3, and an oil reservoir 4.

[0041] The plunger pump component 1 includes a pump body 11, a plunger 12, and an oil outlet check valve 13. The pump body 11 is provided with a plunger hole 14, an oil suction hole 15, and an oil outlet hole 17. One end of the oil suction hole 15 is connected to the inner wall of the plunger hole 14, and the other end of the oil suction hole 15 is connected to the oil storage tank 4. The oil inlet side and the oil outlet side of the oil outlet check valve 13 are respectively connected to the plunger hole 14 and the oil outlet hole 17.

[0042] The electronic control board component 2 includes a control board 21 and position monitoring switches AS22 and BS23 electrically connected to the control board 21. A plunger identification point 18 is fixedly connected to the plunger 12 or the plunger drive component 3. The plunger position identification point 18 moves with the plunger 12. The position monitoring switches AS22 and BS23 send signals by identifying the plunger identification point 18. During the displacement process, the plunger 12 has a plunger position A located at the push-out limit point and a plunger position B located at the return and opening of the oil suction hole 15. The position monitoring switches AS22 and BS23 detect the plunger position identification point 18 and send signals to the control board 21 when the plunger 12 reaches the plunger position A and the plunger position B, respectively.

[0043] The control board 21 receives signals from the position monitoring switch AS22 and the position monitoring switch BS23, and the control board 21 is electrically connected to the plunger drive component 3. The plunger drive component 3 is connected to the plunger 12, so that the control board component 2 controls the plunger drive component 3 to drive the plunger 12 to move back and forth along the plunger hole 14 axially.

[0044] Oil pump single suction: The plunger drive component 3 drives the plunger 12 to move from plunger position A to plunger position B, completing the oil pump single suction.

[0045] Oil pump single discharge: The plunger drive component 3 pushes the plunger 12 from plunger position B to plunger position A, completing the oil pump single discharge.

[0046] Oil pump continuously discharges oil: Control board 21 controls plunger drive component 3 to make plunger 12 continuously and alternately move within the plunger position A and plunger position B interval, thus completing the continuous oil pump discharge.

[0047] It uses an electronic control board component 2 to control the plunger drive component 3 to drive the plunger 12 to reciprocate. By monitoring the plunger position signal, it controls the direction and range of movement of the plunger 12 to complete the oil pump's suction and discharge functions. The stroke of the plunger 12 does not affect the required output torque of the motor 31, so a large oil discharge stroke can be designed, resulting in a large oil pump output. Compared with traditional designs, it has a simpler structure, more reliable operation, and a more compact layout.

[0048] As attached Figures 4-7As shown, the plunger drive component 3 includes a motor 31, a reduction gearbox 32, a screw 33, and a screw sleeve 34. The input end of the reduction gearbox 32 is linked to the motor shaft of the motor 31. The screw sleeve 34 is threadedly engaged with the screw 33. The plunger identification point 18 can be set on the positioning block of the screw sleeve 34 (or on the plunger 12 or the screw sleeve 34). The screw 33 is coaxially arranged with the plunger 12. The output end of the reduction gearbox 32 is connected to the plunger 12 through the engagement structure of the screw 33 and the screw sleeve 34, and is used to drive the plunger 12 to move axially. Motor 31 drives plunger 12 to move linearly along plunger hole 14 via gearbox 32, screw sleeve 34, and screw 33. Changing the rotation direction of motor 31 changes the transmission direction of screw sleeve 34 and screw 33, thus changing the movement direction of plunger 12. The electronic control board component 2 switches the rotation direction of motor 31 according to the plunger position, thereby controlling the reciprocating movement of plunger 12 within the corresponding range to meet the driving requirements of plunger 12. Screw sleeve 34 and plunger 12 are designed coaxially; non-coaxial design should be avoided to prevent bending moments and increase the load on motor 31.

[0049] The transmission structure of screw 33 and screw sleeve 34 has the following two methods:

[0050] (1) The screw 33 is connected to the output end of the gearbox 32, and the screw sleeve 34 is connected to the plunger 12. The screw sleeve 34 is circumferentially limited by a limiting mechanism, so that when the screw 33 rotates, the screw sleeve 34 drives the plunger 12 to move axially. The gearbox 32 drives the screw 33 to rotate, and the screw sleeve 34 moves linearly under the action of the limiting mechanism, and drives the plunger 12 to move back and forth.

[0051] (2) The screw 33 is connected to the plunger 12, and the screw sleeve 34 is connected to the output end of the gearbox 32. The screw sleeve 34 provides axial limiting, so that when the screw sleeve 34 rotates, the screw 33 drives the plunger 12 to move axially. The gearbox 32 drives the screw sleeve 34 to rotate, the screw 33 moves linearly, and drives the plunger 12 to move back and forth. Shortening the cantilever length of the screw 33 improves the rigidity of the screw 33.

[0052] Among them, the limiting mechanism is a structure that limits circumferential movement but allows axial movement. For example, a guide hole is provided on the screw sleeve 34, and a relatively fixed guide rod is provided. The guide rod passes through the guide hole of the screw sleeve 34, so that the screw sleeve 34 can move axially when the screw 33 rotates.

[0053] As attached Figures 4-7As shown, the motor 31 and the screw 33 are respectively disposed on both sides of the reduction gearbox 32 or both disposed on the same side of the reduction gearbox 32. When the motor 31 and the screw 33 are disposed on opposite sides, that is, the input shaft and output shaft of the reduction gearbox 32 are disposed on opposite sides, there are no other components on the motor 31 mounting side, the reduction gearbox 32 structure is more compact, and the motor 31 is easier to install and maintain. When the motor 31 and the screw 33 are disposed on the same side, that is, the input shaft and output shaft of the reduction gearbox 32 are disposed on the same side, the overall size of the oil pump in the direction of the plunger 12's movement can be reduced.

[0054] The position monitoring switches AS22 and BS23 can be set independently and connected to the control board 21 via signal lines. The control board 21 has a flexible design and is not limited by the positioning positions of the monitoring switches AS and BS.

[0055] Furthermore, the motor 31 is a stepper motor or a servo motor. Position monitoring switches AS22 and BS23 can be omitted, and the control board 21 can directly position the plunger via the stepper motor or servo motor to complete the oil pump function.

[0056] Preferably, the plunger drive component 3 can also be selected as a cylinder drive or a hydraulic cylinder drive, using air pressure or hydraulic pressure to drive the plunger 12 to work.

[0057] As attached Figure 4 As shown, the lubrication pump also includes a pressure regulating valve 19, which is connected to the oil outlet 17 of the pump body 11. When the oil pump outlet pressure exceeds the set pressure of the pressure regulating valve 19, the overpressure grease overflows back to the oil storage tank 4 through the pressure regulating valve 19 to prevent the oil pump motor 31 from being overloaded; the pressure regulating valve 19 can adjust the maximum oil pump outlet pressure.

[0058] The control board 21 monitors the operating current of the motor 31, the low oil level signal of the oil reservoir 4, and the output oil pump failure shutdown signal.

[0059] The control board 21 monitors the operating current of the motor 31. When the operating current of the motor 31 reaches the overload current setting value, it controls the motor 31 to stop working to prevent the motor 31 from being overloaded and the oil pump from being damaged.

Claims

1. A lubrication pump for a progressive lubrication system, characterized in that: It includes a plunger pump assembly (1), an electronic control board assembly (2), a plunger drive assembly (3), and an oil reservoir (4); The plunger pump component (1) includes a pump body (11), a plunger (12), and an oil outlet check valve (13). The pump body (11) is provided with a plunger hole (14), an oil suction hole (15), and an oil outlet hole (17). One end of the oil suction hole (15) is connected to the inner wall of the plunger hole (14), and the other end of the oil suction hole (15) is connected to the oil storage cylinder (4). The oil inlet side and the oil outlet side of the oil outlet check valve (13) are respectively connected to the plunger hole (14) and the oil outlet hole (17). The electronic control board component (2) is electrically connected to the plunger drive component (3), and the plunger drive component (3) is connected to the plunger (12), so that the electronic control board component (2) controls the plunger drive component (3) to drive the plunger (12) to move back and forth along the plunger hole (14) axially.

2. The lubrication pump of the progressive lubrication system according to claim 1, characterized in that: The electronic control board component (2) includes a control board (21) and a position monitoring switch AS (22) and a position monitoring switch BS (23) electrically connected to the control board (21). A plunger identification point (18) is fixedly connected to the plunger (12) or the plunger drive component (3). During the displacement process, the plunger (12) has a plunger position A located at the push-out limit point and a plunger position B located at the return and opening of the oil suction hole (15). The position monitoring switch AS (22) and the position monitoring switch BS (23) detect the plunger position identification point (18) and send a signal to the control board (21) when the plunger (12) reaches the plunger position A and the plunger position B, respectively.

3. The lubrication pump of the progressive lubrication system according to claim 1, characterized in that: The plunger drive component (3) includes a motor (31), a reduction gearbox (32), a screw (33), and a screw sleeve (34). The input end of the reduction gearbox (32) is linked to the motor shaft of the motor (31). The screw sleeve (34) is threadedly engaged with the screw (33). The screw (33) is coaxially arranged with the plunger (12). The output end of the reduction gearbox (32) is connected to the plunger (12) through the engagement structure of the screw (33) and the screw sleeve (34) to drive the plunger (12) to move axially.

4. The lubrication pump of the progressive lubrication system according to claim 3, characterized in that: The screw (33) is connected to the output end of the gearbox (32), and the screw sleeve (34) is connected to the plunger (12). The screw sleeve (34) is circumferentially limited by the limiting mechanism, so that when the screw (33) rotates, the screw sleeve (34) drives the plunger (12) to move axially.

5. The lubrication pump of the progressive lubrication system according to claim 3, characterized in that: The screw (33) is connected to the plunger (12), and the screw sleeve (34) is connected to the output end of the gearbox (32). The screw sleeve (34) provides axial limiting, so that when the screw sleeve (34) rotates, the screw (33) drives the plunger (12) to move axially.

6. The lubrication pump of the progressive lubrication system according to claim 3, characterized in that: The motor (31) and screw (33) are respectively located on both sides of the gearbox (32).

7. The lubrication pump of the progressive lubrication system according to claim 3, characterized in that: The motor (31) and the screw (33) are both located on the same side of the gearbox (32).

8. The lubrication pump of the progressive lubrication system according to claim 3, characterized in that: The motor (31) is a stepper motor or a servo motor.

9. The lubrication pump of the progressive lubrication system according to claim 1, characterized in that: The plunger drive component (3) is a cylinder or a hydraulic cylinder.

10. The lubrication pump of the progressive lubrication system according to claim 1, characterized in that: It also includes a pressure regulating valve (19), which is connected to the oil outlet (17) of the pump body (11).

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