Electric piston lubrication pump

Abstract

The application discloses an automatic piston type lubricating pump which can automatically detect faults. The automatic piston type lubricating pump comprises a pump body, a plunger rod, a worm wheel, a worm, a cam, a jacking rod and a driver, an oil storage cavity is formed in the pump body to store oil, a containing structure is arranged in the oil storage cavity to contain the plunger rod, a containing cavity is formed in the containing structure to contain the plunger rod, the plunger rod is installed in the containing cavity through a spring, the containing cavity is a temporary storage cavity at a lower part of the plunger rod, an oil inlet and an oil outlet are arranged at a lower end of the containing structure, the driver is installed in the pump body, the driver is connected with the worm to drive the worm to rotate, the worm wheel is installed in cooperation with the worm, the cam is rotatably installed on the worm wheel, the worm wheel drives the cam to synchronously rotate by at least 1 / 3 of a circle during one rotation of the worm wheel, one end of the jacking rod is hingedly connected to the pump body and the other end of the jacking rod is in abutment and pressure contact with the plunger rod and also in abutment with the cam, a sensor is installed in the oil storage cavity, and the cam is installed with a sensing element.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of lubricating pump, in particular to an electric piston lubricating pump. BACKGROUND

[0002] The conventional electric piston lubricating pump is driven by a micro synchronous motor, the motor drives the worm gear and eccentric wheel to rotate, the worm gear drives the rocker arm to move up and down through the worm gear transmission, the oil is sucked into the cylinder when the plunger rises, the oil is discharged when the plunger resets under the action of the spring, a one-way valve is arranged at the oil outlet to ensure the one-way output of the oil, the lubricating oil is delivered to each lubricating point through the oil delivery system, so as to achieve the purpose of quantitative and periodic oil discharge, and the electric piston lubricating pump has the advantages of green energy saving and is favored by the market in recent years. However, the electric piston lubricating pump lacks oil discharge fault detection, when the micro synchronous motor fails, the worm gear cannot be driven, the eccentric wheel cannot be driven, and the plunger cannot discharge oil normally, so the fault cannot be known in time when the situation occurs, the equipment lubrication fails, and production accidents are caused.

[0003] Therefore, an electric piston lubricating pump with fault detection is needed to overcome the above defects. SUMMARY

[0004] The present application relates to the field of lubricating pump, in particular to an electric piston lubricating pump.

[0005] In order to achieve the above-mentioned purpose, the automatic piston lubricating pump provided by the present application comprises a pump body, a plunger rod, a worm gear, a worm, a cam, a jacking rod and a driver, an oil storage cavity is formed in the pump body for storing oil, a containing structure is arranged in the oil storage cavity for containing the plunger rod, a containing cavity is formed in the containing structure for containing the plunger rod, the plunger rod is installed in the containing cavity through a spring, the containing cavity is a temporary storage cavity below the plunger rod, an oil inlet and an oil outlet are arranged at the lower end of the containing structure, the temporary storage cavity is communicated with the oil storage cavity through the oil inlet, the spring always has a tendency to drive the plunger rod to move downward, the driver is installed on the pump body, the driver is connected with the worm to drive the worm to rotate, the worm gear is installed in cooperation with the worm, the cam is rotatably installed on the worm gear and is arranged non-coaxially with the worm gear, the worm gear drives the cam to rotate at least 1 / 3 of a circle during one rotation of the worm gear, one end of the jacking rod is hinged to the pump body, the other end of the jacking rod abuts against the plunger rod, and the jacking rod also abuts against the cam, a sensor is installed in the oil storage cavity, the cam is installed with a sensing element, the cam makes the sensing element align with the sensor at least once during one rotation of the cam to trigger the sensor, after the jacking rod swings upward to the highest point, the spring restores the deformation to drive the plunger rod to move downward, the jacking rod swings downward when the plunger rod moves downward, the jacking rod pushes the cam to continue rotating relative to the worm gear to the initial position, and the oil in the temporary storage cavity is pushed out when the plunger rod moves downward, and the pushed-out oil is discharged outward through the oil outlet.

[0006] Preferably, the worm gear drives the cam to rotate through a connecting rod.

[0007] Preferably, the worm gear drives the cam to rotate half a circle synchronously in one circle rotation.

[0008] Preferably, the worm gear is provided with a guide rail, one end of the connecting rod is installed on the cam, the connecting rod penetrates into the guide rail, the worm gear drives the cam to rotate synchronously by pushing the connecting rod in the rotation process, after the cam is pushed by the push rod and swings up to the highest point, the spring restores the deformation and pushes the plunger rod to move downward, the plunger rod pushes the push rod to swing downward in the process of moving downward, the push rod thus presses the cam downward to make the cam continue to rotate, and the connecting rod slides along the guide rail.

[0009] Preferably, the guide rail is a circular arc bending structure.

[0010] Preferably, a one-way valve is installed on the oil inlet.

[0011] Preferably, the push rod is provided with an abutting wheel between the two ends, the abutting wheel is rotatably arranged on the push rod, and the push rod abuts against the cam through the abutting wheel.

[0012] Preferably, the sensing element is installed on one side surface of the cam and is adjacent to the edge position of the cam.

[0013] Preferably, the containing structure is provided with an oil filter screen at the lower end of the oil inlet.

[0014] Preferably, the pump body comprises an oil tank and a pump cover arranged above the oil tank, an oil storage cavity is formed in the oil tank, a column-shaped mounting structure extending from the bottom side of the pump cover to the oil storage cavity is arranged, a mounting chamber accommodating the worm is arranged in the mounting structure, a butt joint window in communication with the mounting chamber is arranged on the side wall of the mounting structure, the worm is mounted in cooperation with the worm gear through the butt joint window, the bottom side of the pump cover further extends to form two spaced support structures to the oil storage cavity, the worm gear and the cam are rotatably arranged on the support structures through a support rod, the push rod penetrates between the two support structures, and the mounting structure and the containing structure are arranged on the two sides of the support structures, respectively.

[0015] Compared with the prior art, the sensor is installed in the oil storage cavity, the sensing element is installed on the cam, the sensing element aligns with the sensor at least once in one circle rotation of the cam, and the sensor is triggered, when the sensing element triggers the sensor, it indicates that the cam is normally rotated, the worm gear is also normally rotated, and it indicates that the worm is normally rotated and the driver is normally operated, otherwise, when one of the driver, the worm gear, the worm and the cam fails, the sensing element will not trigger the sensor in one oil pumping cycle, so that the equipment failure can be known in time. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1is a front view of the automatic piston lubrication pump of the present application.

[0017] Figure 2 is an exploded view of the automatic piston lubrication pump of the present application.

[0018] Figure 3 is a perspective view of the automatic piston lubrication pump of the present application after hiding the pump body, driver, liquid level sensor and filter screen, at this time the top rod swings upward to the highest point.

[0019] Figure 4 is Figure 3 a perspective view of the structure shown in another angle.

[0020] Figure 5 is a perspective view of the automatic piston lubrication pump of the present application after hiding the pump body, driver, liquid level sensor and filter screen, at this time the top rod swings downward to the lowest point.

[0021] Figure 6 is Figure 5 a perspective view of the structure shown in another angle.

[0022] Figure 7 is Figure 6 a sectional view of the structure shown in another angle. DETAILED DESCRIPTION

[0023] In order to explain the technical content and structural features of the present application in detail, the following further description is made in combination with the embodiments and the accompanying drawings.

[0024] As Figures 1 to 7 shown, the present application provides an automatic piston lubrication pump 100 for regularly and quantitatively injecting oil to a lubrication point, for example, injecting oil to the lubrication point once an hour or several hours.

[0025] The structure of the automatic piston lubrication pump 100 of the present application is described in detail as follows. The automatic piston lubrication pump 100 of the present application comprises a pump body 10, a plunger rod 20, a worm wheel 30, a worm 40, a cam 50, a jacking rod 60 and a driver 70. An oil storage cavity 11 is formed in the pump body 10, and an accommodating structure 12 for accommodating the plunger rod 20 is arranged in the oil storage cavity 11. The accommodating structure 12 is provided with an accommodating cavity for accommodating the plunger rod 20. The plunger rod 20 is installed in the accommodating cavity through a spring 21. The accommodating cavity is a temporary storage cavity 13 at the lower part of the plunger rod 20. The lower end of the accommodating structure 12 is provided with an oil inlet 14 and an oil outlet 15. The temporary storage cavity 13 is communicated with the oil storage cavity 11 through the oil inlet 14. The spring 21 always has a tendency to drive the plunger rod 20 to move downward. The driver 70 is installed on the pump body 10. The driver 70 drives the worm 40 to rotate through linkage. The worm wheel 30 is installed in cooperation with the worm 40. The cam 50 is rotatably installed on the worm wheel 30 and is arranged non-coaxially with the worm wheel 30. The worm wheel 30 drives the cam 50 to rotate synchronously by at least 1 / 3 of a circle during one rotation of the worm wheel 30. One end of the jacking rod 60 is hingedly connected to the pump body 10. The other end of the jacking rod 60 is in abutment with the plunger rod 20. The jacking rod 60 is in abutment with the cam 50. A sensor 80 is installed in the oil storage cavity 11. The cam 50 is provided with a sensing element 90. The sensing element 90 is aligned with the sensor 80 at least once during one rotation of the cam 50 to trigger the sensor 80.

[0026] When the lubrication point is lubricated, the driver 70 drives the worm 40 to rotate, thereby driving the worm wheel 30 to rotate and synchronously driving the cam 50 to rotate. The rotation of the cam 50 drives the jacking rod 60 to swing, and the jacking rod 60 lifts the plunger rod 20 upward, thereby increasing the volume of the temporary storage cavity 13. Under the action of negative pressure, the oil in the oil storage cavity 11 flows into the temporary storage cavity 13 through the oil inlet 14. After the jacking rod 60 swings upward to the highest point (the state is shown in Figure 3 and Figure 4 ), the spring 21 restores deformation to drive the plunger rod 20 to move downward. When the plunger rod 20 moves downward, the jacking rod 60 is pushed downward to swing, and the jacking rod 60 pushes the cam 50 to continue to rotate relative to the worm wheel 30 to the initial position (the state is shown in Figure 5 and Figure 6 ). During the movement of the plunger rod 20 downward, the oil in the temporary storage cavity 13 is pushed out and flows out to the lubrication point through the oil outlet 15. The worm wheel 30 only needs to rotate a certain angle (less than one circle) to make the cam 50 complete one circle. Therefore, in each lubrication cycle, the driver 70 only needs to drive the worm 40 to rotate a certain angle to complete the entire lubrication action, thereby achieving the effect of green energy saving.

[0027] This invention installs a sensor 80 in the oil storage chamber 11 and a sensing element 90 on the cam 50. During one rotation of the cam 50, the sensing element 90 aligns with the sensor 80 at least once, triggering the sensor 80. When the sensing element 90 triggers the sensor 80, it indicates that the cam 50 is rotating normally, the worm gear 30 is also rotating normally, which means that the worm 40 is rotating normally and the driver 70 is operating normally. Conversely, if any of the driver 70, worm gear 30, worm 40, or cam 50 malfunctions, the sensing element 90 will definitely not trigger the sensor 80 within one oiling cycle, thus enabling timely detection of equipment malfunctions.

[0028] In the embodiments provided by this invention, the sensor 80 is an electromagnetic sensor, and the sensing element 90 is a magnetic element. However, depending on actual needs, the sensor 80 can also be set as an infrared sensor, and the sensing element 90 corresponds to the sensing element that triggers the infrared sensor. Furthermore, the sensing element 90 is mounted on one side of the cam 50, and the sensing element 90 is located near the edge of the cam 50. The rotation of the cam 50 can drive the sensing element 90 to move, which can reflect the normal operation of the worm gear 30.

[0029] like Figures 2 to 7 As shown, the worm gear 30 drives the cam 50 to rotate via a connecting rod 31. Furthermore, during one rotation, the worm gear 30 drives the cam 50 to rotate synchronously by half a rotation. The remaining half rotation of the cam 50 is pushed by the spring 21 against the push rod 60, and the push rod 60 continues to rotate by pushing the cam 50. Specifically, the worm gear 30 is provided with a guide rail 32, and one end of the connecting rod 31 is installed on the cam 50. The connecting rod 31 passes through the guide rail 32. During the rotation of the worm gear 30, the cam 50 is driven to rotate synchronously by pushing the connecting rod 31. After the cam 50 pushes the push rod 60 upward to the highest point, the spring 21 returns to its deformation and pushes the plunger rod 20 downward. During the downward movement, the plunger rod 20 pushes the push rod 60 downward to rotate. The push rod 60 thus presses down on the cam 50, causing the cam 50 to continue rotating (in the embodiment provided by the present invention, the cam 50 continues to rotate half a turn). The connecting rod 31 slides along the guide rail 32, so that the cam 50 returns to its initial position, so that the worm gear 30 can drive the cam 50 to rotate in the next oiling cycle.

[0030] Preferably, the guide rail 32 has a semi-circular arc structure, that is, the connecting rod 31 can slide half a circle in the guide rail 32, but it is not limited to this structure, and the circumference can be increased or decreased.

[0031] like Figure 7As shown, the oil inlet 14 is provided with a one-way valve 141, when the plunger rod 20 moves upward, the volume of the temporary storage cavity 13 becomes larger, negative pressure is generated, the one-way valve 141 is opened, the oil in the oil storage cavity 11 flows into the temporary storage cavity 13 through the oil inlet 14, when the plunger rod 20 moves downward, the one-way valve 141 is closed, the oil in the temporary storage cavity 13 flows out from the oil outlet 15 to the lubrication point. Preferably, the one-way valve 141 adopts a ball valve structure, but is not limited thereto. Preferably, the accommodating structure 12 is provided with an oil filter screen 121 at the lower end of the oil inlet 14, the oil flowing into the temporary storage cavity 13 is filtered through the oil filter screen 121, so that the oil is clean.

[0032] As shown in the drawings, Figures 2 to 7 The top rod 60 is provided with an abutting wheel 61 between the two ends thereof, the abutting wheel 61 is rotatably arranged on the top rod 60, and the top rod 60 abuts against the cam 50 through the abutting wheel 61 to reduce friction. Preferably, the end of the top rod 60 abutting against the plunger rod 20 is provided with an abutting protrusion 62, the side surface of the abutting protrusion 62 is arc-shaped, so as to facilitate the pushing of the plunger rod 20 by the top rod 60 and reduce friction.

[0033] Preferably, when the top rod 60 swings upward to the highest point, the cam 50 abuts against the abutting wheel 61, when the top rod 60 swings downward to the lowest point, the cam 50 does not abut against the abutting wheel 61, of course, at this time, the two can also abut against each other in a lighter pressure mode. When the top rod 60 swings downward to the lowest point, the cam 50 is substantially at the initial position at this time.

[0034] As shown in the drawings, Figures 2 to 7 In order to facilitate the adjustment of the lubrication displacement, the plunger rod 20 is arranged in the accommodating cavity in a length-adjustable manner, the greater the length of the plunger rod 20 extending into the accommodating cavity, the greater the compression amount of the spring 21, and the more difficult it is to push the plunger rod 20 to move upward, and the smaller the oil that can be stored in the temporary storage cavity 13 each time the oil is pumped, and vice versa. An oil scale is also marked on the top of the plunger rod 20, so as to facilitate the adjustment to the corresponding oil pumping amount, and the plunger rod 20 can be locked by using a screw or the like after the corresponding oil pumping amount is adjusted.

[0035] As shown in the drawings, Figure 1 and Figure 2 The automatic piston type lubricating pump 100 of the present application further comprises a liquid level sensor 01 arranged in the oil storage cavity 11, and the liquid level of the oil in the oil storage cavity 11 is detected through the liquid level sensor 01.

[0036] As shown in the drawings, Figure 1 and Figure 2As shown, the pump body 10 of the present application comprises an oil tank 16 and a pump cover 17 arranged above the oil tank 16, the pump cover 17 is arranged on the oil tank 16, the plunger rod 20, the worm wheel 30, the worm 40, the cam 50, the ejector rod 60, the driver 70, the sensor 80 and other structures are installed on the pump cover 17, and the oil storage cavity 11 is formed in the oil tank 16. In order to facilitate the oil supplement to the oil storage cavity 11, the oil inlet 171 is arranged on the pump cover 17, and the filter screen 1711 is arranged on the oil inlet 171.

[0037] As shown, Figures 2 to 6 The bottom side of the pump cover 17 extends to the oil storage cavity 11 and a column-shaped mounting structure 172 is arranged, the mounting structure 172 is provided with a mounting cavity for accommodating the worm 40, a butt joint window 173 is arranged on the side wall of the mounting structure 172 and communicates with the mounting cavity, and the worm 40 is mounted in cooperation with the worm wheel 30 through the butt joint window 173.

[0038] The bottom side of the pump cover 17 further extends to the oil storage cavity 11 and forms two support structures 174 arranged at intervals, the worm wheel 30 and the cam 50 are rotatably mounted on the support structures 174 through a support rod 175, the ejector rod 60 passes through between the two support structures 174, and the mounting structure 172 and the accommodating structure 12 are respectively arranged on the two sides of the support structures 174, so as to optimize the internal structure arrangement and improve the structural stability.

[0039] The above only discloses the preferred examples of the present application, and cannot limit the scope of the present application, therefore, the equivalent changes made according to the claims of the present application all belong to the scope covered by the present application.

Claims

1. An automatic piston-type lubrication pump, characterized in that: The pump includes a pump body, a plunger rod, a worm gear, a worm, a cam, a push rod, and a driver. The pump body forms an oil reservoir, and the oil reservoir contains a housing structure for accommodating the plunger rod. The housing structure forms a cavity to accommodate the plunger rod, which is spring-loaded into the cavity. The lower portion of the cavity is a temporary storage chamber. The lower end of the housing structure has an oil inlet and an oil outlet. The temporary storage chamber communicates with the oil reservoir through the oil inlet. The spring is designed to drive the plunger rod downwards. The trend is that the driver is installed in the pump body, and the driver is connected to the worm gear to drive the worm gear to rotate. The worm wheel is installed in conjunction with the worm gear. The cam is rotatably installed on the worm wheel and the two are not coaxial. During one rotation of the worm wheel, it drives the cam to rotate synchronously by at least 1 / 3 of a rotation. One end of the push rod is hinged to the pump body, and the other end of the push rod abuts against the plunger rod. The push rod also abuts against the cam. A sensor is installed in the oil reservoir, and a sensing element is installed on the cam. During one rotation, the cam aligns the sensing element with the sensor at least once to trigger the sensor. After the push rod swings upward to its highest point, the spring returns to its original deformation, driving the plunger rod downward. As the plunger rod moves downward, it pushes the push rod to swing downward. The push rod pushes the cam to continue rotating relative to the worm gear to its initial position. During the downward movement of the plunger rod, it pushes the oil in the temporary storage chamber out, and the pushed oil is ejected outward through the oil outlet. The worm gear drives the cam to rotate via a connecting rod. The worm gear is provided with a guide rail, and one end of the connecting rod is mounted on the cam. The connecting rod passes through the guide rail. During the rotation of the worm gear, the cam rotates synchronously by pushing the connecting rod. After the cam pushes the push rod upward to its highest point, the spring returns to its original deformation and pushes the plunger rod downward. During the downward movement of the plunger rod, the push rod pushes the push rod downward, causing the push rod to press down on the cam and make the cam continue to rotate. The connecting rod slides along the guide rail. The guide rail has an arc-shaped bent structure.

2. The automatic piston lubrication pump according to claim 1, characterized in that, The worm gear drives the cam to rotate half a turn synchronously during one rotation.

3. The automatic piston lubrication pump according to claim 1, characterized in that, The oil inlet is equipped with a check valve.

4. The automatic piston lubrication pump according to claim 1, characterized in that, The push rod is fitted with abutting wheels between its two ends. The abutting wheels are rotatably mounted on the push rod, and the push rod abuts against the cam via the abutting wheels.

5. The automatic piston lubrication pump according to claim 1, characterized in that, The sensing element is mounted on one side of the cam, and the sensing element is located near the edge of the cam.

6. The automatic piston lubrication pump according to claim 1, characterized in that, An oil filter screen is installed at the lower end of the oil inlet of the accommodating structure.

7. The automatic piston lubrication pump according to claim 1, characterized in that, The pump body includes an oil tank and a pump cover covering the oil tank. An oil storage chamber is formed inside the oil tank. A columnar mounting structure extends from the bottom side of the pump cover into the oil storage chamber. The mounting structure has a mounting chamber for accommodating the worm gear. A docking window communicating with the mounting chamber is opened on the side wall of the mounting structure. The worm gear is installed in conjunction with the worm wheel through the docking window. The bottom side of the pump cover also extends into the oil storage chamber to form two spaced-apart support structures. The worm wheel and the cam are rotatably mounted on the support structures by means of a support rod. The push rod passes between the two support structures. The mounting structure and the accommodating structure are respectively located on both sides of the support structure.

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