Single-point lubrication pump with automatic fault detection function

Abstract

The utility model discloses a single-point lubrication pump capable of automatically detecting faults, which can automatically detect the faults of equipment and avoid long-time oil-free lubrication of specific lubrication positions. The single-point lubrication pump with the automatic fault detection function comprises a pump body, a power source, a driving device, an oil pumping device, a sensor, a circuit board, a mode selection switch and an indicating lamp, the driving device is installed on the pump body, the oil pumping device is installed in the pump body and connected to the output end of the driving device, and the sensor is installed on the circuit board. The power source, the driving device, the sensor, the mode selection switch and the indicator lamp are electrically connected with the circuit board, the driving device drives the oil pumping device to pump oil according to a certain frequency according to an oil pumping mode selected by the mode selection switch, and the sensor detects the motion state of the driving device. The indicating lamp is turned on according to a first prompting mode when the sensor detects that the driving device normally drives the oil pumping device to pump oil, and the indicating lamp is turned on according to a second prompting mode when the detector detects that the driving device cannot normally drive the oil pumping device to pump oil.

Description

Technical Field

[0001] This utility model relates to the field of lubrication equipment, and in particular to a single-point lubrication pump with automatic fault detection. Background Technology

[0002] In production activities, the lubrication system of equipment plays a very important role. Whether the lubrication system can work properly directly affects the smooth progress of production. Therefore, good equipment lubrication is a necessary condition for smooth production.

[0003] For large equipment, multiple points often require lubrication, but these points are sometimes not clustered together. Using lubrication equipment requires long branch lines to supply oil to each point, resulting in a complex and bulky structure that is inconvenient for production layout and installation. Furthermore, when a branch line breaks, the break point becomes a pressure relief point in the system, leading to reduced lubrication pressure and affecting the amount and effectiveness of lubrication. To address this, a single-point lubrication pump has been introduced to the market, capable of individually lubricating a specific lubrication point, ensuring that this particular point receives proper lubrication. However, single-point lubrication pumps have long lubrication cycles, making fault detection difficult. When a fault occurs, it directly affects the lubrication needs of that specific lubrication point. Therefore, there is an urgent need for a single-point lubrication pump with automatic fault detection capabilities. Utility Model Content

[0004] The purpose of this invention is to provide a single-point lubrication pump that can automatically detect faults.

[0005] To achieve the above objectives, the automatic fault detection single-point lubrication pump of this utility model includes a pump body, a power supply, a drive unit, an oil pumping device, a sensor, a circuit board, a mode selection switch, and an indicator light. The drive unit is installed in the pump body, and the oil pumping device is installed in the pump body and connected to the output end of the drive unit. The power supply, drive unit, sensor, mode selection switch, and indicator light are electrically connected to the circuit board. The drive unit drives the oil pumping device to pump oil at a certain frequency according to the oil pumping mode selected by the mode selection switch. The sensor detects the movement status of the drive unit. The indicator light illuminates according to the first prompt mode when the sensor detects that the drive unit is normally driving the oil pumping device to pump oil, and illuminates according to the second prompt mode when the sensor detects that the drive unit cannot normally drive the oil pumping device to pump oil.

[0006] Preferably, the drive unit includes a drive motor, a worm, a worm wheel, and a crank. The drive motor is mounted on the pump body, the worm is mounted on the output end of the drive motor, the worm wheel is centrally pivotally mounted on the pump body, and the worm wheel and worm are meshed and connected for transmission. The first end of the crank is hinged to the worm wheel, and the second end of the crank is connected to the oil pumping device. A sensor is located beside the worm wheel, and the sensor determines whether the drive unit is properly driving the oil pumping device to pump oil by detecting whether the worm wheel is rotating normally.

[0007] Preferably, the sensor is a reed switch, and a magnet is mounted on the worm gear. The rotation of the worm gear causes the magnet to move closer to or away from the reed switch, thereby triggering the reed switch.

[0008] Preferably, the magnet and the worm gear are arranged in a non-coaxial manner.

[0009] Preferably, a mounting hole is provided at the bottom of the worm gear, which is offset from the center of the worm gear, and the magnet is mounted in the mounting hole.

[0010] Preferably, the mode selection switch includes a first DIP switch and a second DIP switch, which are electrically connected to the circuit board respectively. The first DIP switch and the second DIP switch determine the corresponding lubrication mode according to the oil volume in the oil pack and the lubrication cycle.

[0011] Preferably, the indicator light in the first prompt mode turns off for a first duration and then turns on green for a second duration, and the indicator light in the second prompt mode turns off for a first duration and then turns on red for a second duration.

[0012] Preferably, the oil pumping device includes a plunger, a sliding sleeve, and a check valve. The pump body has an installation cavity, an oil inlet channel, and an oil outlet channel. The sliding sleeve and the check valve are each installed in the installation cavity and are arranged on the left and right sides, respectively. The sliding sleeve has an oil storage channel and an oil inlet. The oil storage channel is connected to the oil inlet channel through the oil inlet. The oil outlet channel is connected to the check valve. The second end of the crank is hinged to the plunger. The drive motor drives the crank to rotate by driving the meshing transmission of the worm gear and the worm, thereby driving the plunger to slide left and right in the oil storage channel. The drive device drives the plunger to the right past the oil inlet, pushing the oil in the oil storage channel towards the check valve, causing the oil to open the check valve and flow into the oil outlet channel.

[0013] Preferably, the drive unit also includes a connecting wheel, which is centrally pivotally mounted on the bottom of the worm gear, with the center of rotation of the connecting wheel offset from the center of rotation of the worm gear, and the first end of the crank hinged to the connecting wheel.

[0014] Preferably, the single-point lubrication pump with automatic fault detection of this utility model also includes an oil tank, an oil reservoir and a pressure spring inside the oil tank. The oil tank is installed on the pump body and located above the pump body. The oil reservoir and the pressure spring are located inside the oil tank. The oil reservoir is connected to the oil inlet channel. The pressure spring presses against the oil reservoir to force the grease in the oil reservoir into the oil inlet channel.

[0015] Compared with existing technologies, this invention adds sensors and indicator lights. The sensors detect whether the drive unit can properly operate the oil pump. The operating status of the drive unit directly determines whether the single-point lubrication pump has malfunctioned. When the drive unit normally drives the oil pump, the equipment is operating normally, and the indicator light illuminates according to the first indication mode. When the drive unit fails to properly drive the oil pump, the equipment malfunctions, and the indicator light illuminates according to the second indication mode, thus achieving automatic fault detection of the single-point lubrication pump. By directly observing which indication mode the indicator light illuminates, one can intuitively know whether the equipment has malfunctioned, thereby reminding personnel to avoid prolonged periods without lubrication at that specific lubrication point. Attached Figure Description

[0016] Figure 1 This is a perspective view of the single-point lubrication pump with automatic fault detection according to this utility model.

[0017] Figure 2 yes Figure 1 The diagram shows a three-dimensional view of the single-point lubrication pump with automatic fault detection after separation from the outer casing.

[0018] Figure 3 This is a perspective view of the single-point lubrication pump with automatic fault detection according to this utility model, with the oil tank, outer cover, sensor, circuit board, mode selection switch, indicator light and bracket hidden.

[0019] Figure 4 yes Figure 3 The diagram shows a three-dimensional view of the structure at another angle, separated from the power source.

[0020] Figure 5 This is a perspective view of the single-point lubrication pump with automatic fault detection according to this utility model, with the oil tank, outer cover, circuit board, mode selection switch, indicator light, power supply and bracket hidden.

[0021] Figure 6 yes Figure 5 The structure shown is a three-dimensional view after being separated from the magnet.

[0022] Figure 7 This is a top view of the single-point lubrication pump with automatic fault detection according to this utility model.

[0023] Figure 8 It is along Figure 6 The cross-sectional view obtained after cutting the middle AA line segment shows the plunger moving to the right past the oil inlet.

[0024] Figure 9 This is a structural diagram showing the power supply, sensor, indicator light, drive motor, first DIP switch, and second DIP switch of this utility model when they are electrically connected to the circuit board.

[0025] Figure 10 and Figure 11 The data table is obtained by running the test with oil package capacities of 125ml and 250ml respectively. Detailed Implementation

[0026] To explain the technical content and structural features of this utility model in detail, the following description is provided in conjunction with the embodiments and accompanying drawings.

[0027] The single-point lubrication pump 100 with automatic fault detection of this utility model is used to output lubricating grease to a specific lubrication position, supply oil lubrication to the specific lubrication position, and can realize automatic fault detection. When the equipment fails, it will issue a prompt signal to remind the staff that the equipment has failed and replace it in time, so as to avoid the specific lubrication position being without oil lubrication for a long time.

[0028] like Figures 1 to 9 As shown, the automatic fault-tolerant single-point lubrication pump 100 of this utility model includes a pump body 10, a power supply 20, a drive unit 30, an oil pumping device 40, a sensor 50, a circuit board 60, a mode selection switch 70, and an indicator light 80. The drive unit 30 is installed in the pump body 10, and the oil pumping device 40 is installed inside the pump body 10 and connected to the output terminal of the drive unit 30. The power supply 20, drive unit 30, sensor 50, mode selection switch 70, and indicator light 80 are electrically connected to the circuit board 60. The drive unit 30 drives the oil pumping device 40 to pump oil at a certain frequency according to the oil pumping mode selected by the mode selection switch 70. The sensor 50 detects the movement status of the drive unit 30. The indicator light 80 illuminates according to a first prompt mode when the sensor 50 detects that the drive unit 30 is normally driving the oil pumping device 40 to pump oil. The indicator light 80 illuminates according to a second prompt mode when the sensor 50 detects that the drive unit 30 cannot normally drive the oil pumping device 40 to pump oil.

[0029] This invention adds a sensor 50 and an indicator light 80. The sensor 50 detects whether the drive device 30 can normally drive the oil pumping device 40. The working state of the drive device 30 directly determines whether the single-point lubrication pump 100 has malfunctioned. When the drive device 30 normally drives the oil pumping device 40 to pump oil, the equipment is operating normally, and the indicator light 80 illuminates according to the first indication mode. When the drive device 30 fails to drive the oil pumping device 40 to pump oil normally, the equipment has malfunctioned, and the indicator light 80 illuminates according to the second indication mode. By directly observing which indication mode the indicator light 80 illuminates, one can intuitively know whether the equipment has malfunctioned, thus reminding the staff to avoid prolonged periods without lubrication at that specific lubrication point. The circuit board 60 mentioned above is also called a PCB board, a common structure in this field. The indicator light 80 can be selected as a light bead, LED light, etc.

[0030] The single-point lubrication pump 100 provided by this utility model can be installed alone at a specific location that requires oil lubrication to achieve single-point lubrication function. Since it is equipped with a power supply 20 to supply power to the drive device 30, it can output grease normally even in the absence of power and air supply, ensuring normal oil supply to the location that needs lubrication.

[0031] It is worth noting that in this invention, the power supply 20 is composed of multiple dry cell batteries, such as a combination of three dry cell batteries, and is directly connected to the drive device 30. Of course, the power supply can also be a battery module, which is transformed and then connected to the drive device 30. For example, a 24V power module is used, which is transformed to output 4.5V and then connected to the drive device 30.

[0032] like Figures 2 to 8 As shown, the drive unit 30 includes a drive motor 31, a worm gear 32, a worm wheel 33, and a crank 34. The drive motor 31 is mounted on the pump body 10, the worm gear 32 is mounted on the output end of the drive motor 31, and the worm wheel 33 is pivotally mounted on the pump body 10. The worm wheel 33 and the worm gear 32 are meshed and connected for transmission. The first end of the crank 34 is hinged to the worm wheel 33, and the second end of the crank 34 is hinged to the plunger 41. A sensor 50 is located beside the worm wheel 33. The sensor 50 determines whether the drive unit 30 is properly driving the oil pumping device 40 to pump oil by detecting whether the worm wheel 33 is rotating normally. The structure using the combination of the worm gear and crank 34 allows for structural arrangement within a limited space, making the overall structure more compact. The drive motor 31 is not limited to a specific type; its input voltage is 4.5V, but it is not limited to this. When the worm gear 33 rotates normally, it drives the crank 34 to swing, thereby driving the oil pumping device 40 to pump oil. By detecting whether the worm gear 33 rotates normally, it can be determined whether the drive device 30 is driving the oil pumping device 40 to pump oil normally. Specifically, the drive motor 31 is electrically connected to the circuit board 60.

[0033] like Figures 2 to 8As shown, sensor 50 is a reed switch, and a magnet 35 is mounted on the worm gear 33. The rotation of the worm gear 33 causes the magnet 35 to move closer to or away from the reed switch, thus triggering it. When the worm gear 33 rotates normally, the reed switch will definitely be triggered once in a single operating cycle, thus outputting a detection signal to the circuit board 60. The circuit board 60 sends a corresponding control command to the indicator light 80 based on the detection signal, and the indicator light 80 illuminates according to the first indication mode. When the worm gear 33 cannot rotate normally, the reed switch will not experience a triggering process once in a single operating cycle, thus outputting another detection signal to the circuit board 60. The circuit board 60 sends a corresponding control command to the indicator light 80 based on this detection signal, and the indicator light 80 illuminates according to the second indication mode. Preferably, the magnet 35 and the worm gear 33 are arranged non-coaxially. Each rotation of the worm gear 33 can cause the magnet 35 to move closer to or away from the reed switch.

[0034] like Figure 2 and Figure 6 As shown, a mounting hole 331 is further provided at the bottom of the worm gear 33. The mounting hole 331 is offset from the center of the worm gear 33, and the magnet 35 is mounted in the mounting hole 331. The mounting hole 331 facilitates the installation of the magnet 35 and allows it to rotate synchronously with the worm gear 33.

[0035] like Figure 9 As shown, the mode selection switch 70 includes a first DIP switch 71 and a second DIP switch 72. The first DIP switch 71 and the second DIP switch 72 are electrically connected to the circuit board 60. In the embodiment provided by this utility model, the first DIP switch 71 is directly mounted on the circuit board 60, and the second DIP switch 72 is mounted on the circuit board 60 via a ribbon cable. In addition, the indicator light 80 is also directly mounted on the circuit board 60, or can be electrically connected to the circuit board 60 via a wire. The corresponding oiling mode is determined by operating the first DIP switch 71 and the second DIP switch 72 according to the oil level in the oil reservoir and the oil change cycle.

[0036] Specifically, the first DIP switch 71 is operated according to the oil volume of the oil pack, and the corresponding oil volume parameter is input. For example, this utility model uses three sizes of oil packs, but is not limited to three sizes. The capacities of these three oil packs are 125ml, 250ml, and 500ml, respectively. If a 125ml oil pack is used, oil volume parameter code 01 is input by operating the first DIP switch 71, and the circuit board 60 then knows that the oil pack capacity is 125ml; if a 250ml oil pack is used, oil volume parameter code 10 is input by operating the first DIP switch 71, and the circuit board 60 then knows that the oil pack capacity is 250ml; if a 500ml oil pack is used, oil volume parameter code 11 is input by operating the first DIP switch 71, and the circuit board 60 then knows that the oil pack capacity is 500ml. In this way, the oil pack capacity is determined first. The specific setting of the oil volume parameter code described above is only an example of one embodiment and does not constitute a limitation of this utility model.

[0037] Next, set the grease change cycle for single-point lubrication, such as 0.5 months, 1 month, 2 months, 3 months, 6 months, 12 months, but not limited to the above grease change cycles, by operating the second DIP switch 72 to input the corresponding operating parameter code. For example, if a 0.5-month replacement cycle is selected, and the operating parameter code 0001 is input via the second DIP switch 72, the circuit board 60 will then recognize the 0.5-month replacement cycle. If a 1-month replacement cycle is selected, and the operating parameter code 0010 is input via the second DIP switch 72, the circuit board 60 will then recognize the 1-month replacement cycle. If a 2-month replacement cycle is selected, and the operating parameter code 0011 is input, the circuit board 60 will then recognize the 2-month replacement cycle. If a 3-month replacement cycle is selected, and the operating parameter code 0100 is input, the circuit board 60 will then recognize the 3-month replacement cycle. If a 6-month replacement cycle is selected, and the operating parameter code 0101 is input, the circuit board 60 will then recognize the 6-month replacement cycle. If a 12-month replacement cycle is selected, and the operating parameter code 0110 is input, the circuit board 60 will then recognize the 12-month replacement cycle. The specific settings of the operating parameter codes described above are merely examples of one implementation method and do not constitute a limitation of this utility model.

[0038] Therefore, the corresponding refueling mode can be determined by the combined input of the fuel quantity parameter code (01, 10, 11) and the operating parameter code (0001, 0010, 0011, 0100, 0101, 0110) on the circuit board 60.

[0039] exist Figure 10 and Figure 11The table shown illustrates the data using oil tank capacities of 125ml and 250ml as examples. After determining the oil volume and operating parameters, the program to be executed is uniquely determined, i.e., how to execute the above oiling mode, which is ultimately reflected in how to drive the worm gear 33 to rotate, including the total number of runs and the single run cycle (normal single run time + rest time).

[0040] It's also worth noting that the running time is set to 13 seconds. However, if a signal is detected earlier than this 13 seconds, for example, after 8 seconds, the device will enter a pause state prematurely. In this case, indicator light 80 will illuminate according to the first prompt mode within the pause time range. If no signal is detected after 13 seconds, the device will also enter a pause state, but indicator light 80 will illuminate according to the second prompt mode within the pause time range.

[0041] It is also worth noting that regardless of the oil dispensing mode selected, the amount of oil dispensed by the oil pump 40 each time remains constant, for example, 0.28ml.

[0042] like Figure 1 , Figure 2 , Figure 9 As shown, in the first alert mode, indicator light 80 turns off for a first duration and then turns on green for a second duration. For example, if the first duration is set to 10 seconds and the second duration is set to 1 second, then indicator light 80 in the first alert mode will turn off for 10 seconds and then turn on green for 1 second, repeating this cycle continuously. In the second alert mode, indicator light 80 turns off for a first duration and then turns on red for a second duration. For example, then indicator light 80 in the second alert mode will turn off for 10 seconds and then turn on red for 1 second, repeating this cycle continuously. Therefore, it can be concluded that a maximum of 11 seconds of waiting is sufficient to determine whether the single-point lubrication pump 100 has malfunctioned.

[0043] like Figures 2 to 8As shown, the oil pumping device 40 includes a plunger 41, a sliding sleeve 42, and a one-way valve 43. The pump body 10 has an installation cavity 11, an oil inlet channel 12, and an oil outlet channel 13. The sliding sleeve 42 and the one-way valve 43 are each installed in the installation cavity 11, arranged to the left and right respectively. The sliding sleeve 42 has an oil storage channel 421 and an oil inlet 422. The oil storage channel 421 communicates with the oil inlet channel 12 through the oil inlet 422, and the oil outlet channel 13 communicates with the one-way valve 43. The second end of the crank 34 is hinged to the plunger 41. The drive motor 31 drives the crank 34 to rotate by driving the meshing of the worm gear 33 and the worm 32, thereby causing the plunger 41 to slide left and right in the oil storage channel 421. The drive unit 30 drives the plunger 41 to the right past the oil inlet 422, pushing the oil in the oil storage channel 421 towards the check valve 43, causing the oil to open the check valve 43 and flow into the oil outlet channel 13. To facilitate the hinge between the crank 34 and the worm gear 33, the drive unit 30 also includes a connecting wheel 36, which is centrally pivotally mounted on the bottom of the worm gear 33. The center of rotation of the connecting wheel 36 is offset from the center of rotation of the worm gear 33, and the first end of the crank 34 is hinged to the connecting wheel 36.

[0044] like Figure 1 , Figure 2 and Figure 8 As shown, the single-point lubrication pump 100 with automatic fault detection of this utility model also includes an oil tank 90. ​​The oil tank 90 contains an oil reservoir 91 and a pressure spring 92. The oil tank 90 is installed on top of the pump body 10. The oil reservoir 91 and the pressure spring 92 are located inside the oil tank 90. ​​The oil reservoir 91 is connected to the oil inlet channel 12, and the pressure spring 92 presses against the oil reservoir 91 to force the grease inside the oil reservoir 91 into the oil inlet channel 12.

[0045] To facilitate the installation and fixing of the pump body 10 and the power supply 20, a bracket 93 is also provided to support the pump body 10 and the power supply 20. The automatic fault detection single-point lubrication pump 100 of this utility model also includes an outer cover 94. The outer cover 94 is fixed to the bracket 93 using screws or other structures. The outer cover 94 encloses the power supply 20, drive unit 30, pump body 10, sensor 50, circuit board 60, first DIP switch 71, and second DIP switch 72. The outer cover 94 provides protection and is waterproof and dustproof. Preferably, the indicator light 80 protrudes from the side wall of the outer cover 94 for easy observation. The outer cover 94 is generally cylindrical, but not limited to this. The oil tank 90 is fixed to the outer cover 94, and the two are sealed using a sealing ring or similar material.

[0046] The above-disclosed examples are merely preferred embodiments of the present utility model and should not be construed as limiting the scope of the present utility model. Therefore, any equivalent variations made in accordance with the claims of the present utility model shall fall within the scope of the present utility model.

Claims

1. A single-point lubrication pump with automatic fault detection, characterized in that: The system includes a pump body, a power supply, a drive unit, an oil pumping device, a sensor, a circuit board, a mode selection switch, and an indicator light. The drive unit is mounted on the pump body, and the oil pumping device is mounted inside the pump body and connected to the output terminal of the drive unit. The power supply, the drive unit, the sensor, the mode selection switch, and the indicator light are electrically connected to the circuit board. The drive unit drives the oil pumping device to pump oil at a certain frequency according to the oil pumping mode selected by the mode selection switch. The sensor detects the movement status of the drive unit. The indicator light illuminates according to a first prompt mode when the sensor detects that the drive unit is normally driving the oil pumping device to pump oil, and according to a second prompt mode when the sensor detects that the drive unit is not normally driving the oil pumping device to pump oil.

2. The single-point lubrication pump with automatic fault detection according to claim 1, characterized in that, The drive device includes a drive motor, a worm, a worm wheel, and a crank. The drive motor is mounted on the pump body, the worm is mounted on the output end of the drive motor, and the worm wheel is pivotally mounted on the pump body. The worm wheel and the worm are meshed and connected for transmission. The first end of the crank is hinged to the worm wheel, and the second end of the crank is connected to the oil pumping device. The sensor is located beside the worm wheel, and the sensor determines whether the drive device is properly driving the oil pumping device to pump oil by detecting whether the worm wheel is rotating normally.

3. The single-point lubrication pump with automatic fault detection according to claim 2, characterized in that, The sensor is a reed switch, and a magnet is mounted on the worm gear. The rotation of the worm gear causes the magnet to move closer to or away from the reed switch, thereby triggering the reed switch.

4. The single-point lubrication pump with automatic fault detection according to claim 3, characterized in that, The magnet and the worm gear are arranged in a non-coaxial manner.

5. The single-point lubrication pump with automatic fault detection according to claim 3, characterized in that, The bottom of the worm gear has a mounting hole, which is offset from the center of the worm gear, and the magnet is mounted in the mounting hole.

6. The single-point lubrication pump with automatic fault detection according to claim 1, characterized in that, The mode selection switch includes a first DIP switch and a second DIP switch. The first DIP switch and the second DIP switch are electrically connected to the circuit board. The first DIP switch and the second DIP switch determine the corresponding lubrication mode according to the oil volume in the oil pack and the lubrication cycle.

7. The single-point lubrication pump with automatic fault detection according to claim 1, characterized in that, When the indicator light is in the first prompt mode, it turns off for a first duration and then turns on green for a second duration. When the indicator light is in the second prompt mode, it turns off for a first duration and then turns on red for a second duration.

8. The single-point lubrication pump with automatic fault detection according to claim 2, characterized in that, The oil pumping device includes a plunger, a sliding sleeve, and a check valve. The pump body has an installation cavity, an oil inlet channel, and an oil outlet channel. The sliding sleeve and the check valve are each installed in the installation cavity and are arranged on the left and right sides, respectively. The sliding sleeve has an oil storage channel and an oil inlet. The oil storage channel is connected to the oil inlet channel through the oil inlet. The oil outlet channel is connected to the check valve. The second end of the crank is hinged to the plunger. The drive motor drives the crank to rotate by driving the meshing transmission of the worm gear and the worm, thereby driving the plunger to slide left and right in the oil storage channel. The drive device drives the plunger to the right past the oil inlet, pushing the oil in the oil storage channel towards the check valve, causing the oil to open the check valve and flow into the oil outlet channel.

9. The single-point lubrication pump with automatic fault detection according to claim 8, characterized in that, The drive device further includes a connecting wheel, which is centrally pivotally mounted on the bottom of the worm gear. The rotation center of the connecting wheel is offset from the rotation center of the worm gear, and the first end of the crank is hinged to the connecting wheel.

10. The single-point lubrication pump with automatic fault detection according to claim 8, characterized in that, It also includes an oil tank, which contains an oil reservoir and a pressure spring. The oil tank is installed on the pump body and located above the pump body. The oil reservoir and the pressure spring are located inside the oil tank. The oil reservoir is connected to the oil inlet channel. The pressure spring presses against the oil reservoir to force the grease in the oil reservoir into the oil inlet channel.

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