Double-line lubricating pump and pump head assembly

Abstract

The utility model relates to a double-line lubricating pump and a pump head assembly. The stable detection of the liquid level of the double-line pump can be realized. The seesaw assembly is installed at the upper end of the output shaft in a swinging mode and rotates along with the output shaft, and the seesaw assembly can swing around the swinging axis of the seesaw assembly after being subjected to lubricating grease resistance in the swinging direction so that one end of the seesaw assembly can tilt up; a magnet part is arranged at the tilting end of the seesaw assembly; the magnet part and the magnetic induction sensor are located on the same circle with the output shaft as the circle center. When the output shaft rotates forwards, the monitor collects signals of the magnetic induction sensor, if lubricating grease is too much, one end, rotating along with the output shaft, of the seesaw assembly swings and tilts upwards, and the magnet part is separated from the induction range of the magnetic induction sensor; if the lubricating grease is less, the end, provided with the magnet part, of the seesaw assembly swings downwards, and the magnet part can be sensed by the magnetic induction sensor when rotating to the position above the magnetic induction sensor; when the output shaft rotates reversely, the monitor stops collecting signals of the magnetic induction sensor.

Description

Technical Field

[0001] The utility model relates to a double-line lubricating pump and a pump head assembly. Background Art

[0002] The double-line lubricating pump is a key component of the centralized lubrication system, which can regularly, quantitatively inject lubricating grease into each lubrication-required part of the equipment through pipelines. The double-line lubricating pump mainly includes an oil tank and a pump head assembly. The pump head assembly mainly includes components such as a motor, a speed reduction mechanism, a transmission mechanism, a plunger pair, a distribution disk, and a rotary oil pressing plate. Among them, the output shaft of the transmission mechanism extends upward from the pump base into the oil tank above the distribution disk. The rotary oil pressing plate is fixedly installed on the output shaft and rotates with the output shaft to squeeze the lubricating grease in the oil tank downward, so as to facilitate the plunger pair to better suck the lubricating grease. The motor of the double-line lubricating pump needs to rotate forward and backward to switch the oil outlet. Therefore, the rotary oil pressing plate also needs to rotate forward and backward accordingly. For the specific structure of the rotary oil pressing plate, refer to the published content with the application publication number CN110529719A. Its rotary oil pressing plate (seesaw assembly) can swing to squeeze the lubricating grease with the oil-facing surface when rotating forward and backward respectively due to the resistance of the lubricating grease.

[0003] Before the lubricating grease in the oil tank is used up, it is necessary to timely remind to replace it to ensure the uninterrupted operation of the lubrication system, thereby avoiding the problem that the equipment is damaged due to lack of timely lubrication. Since the rotary oil pressing plate of the double-line lubricating pump swings in different directions when rotating forward and backward respectively, it is very difficult to stably detect the oil level in the oil tank in the traditional way, and it cannot timely remind the maintenance personnel to supplement the lubricating grease, resulting in the lubrication system being unable to normally inject lubricating grease into the equipment, and there is a greater potential safety hazard of equipment damage. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a pump head assembly that can stably detect the low oil level of the oil tank, and the purpose of the utility model is also to provide a double-line lubricating pump using the above pump head assembly.

[0005] The technical solution of the pump head assembly of the utility model is as follows: The pump head assembly includes:

[0006] A pump base;

[0007] A monitor;

[0008] A transmission mechanism, including an output shaft extending upward from the pump base into the oil tank;

[0009] A seesaw assembly, swingably installed at the upper end of the output shaft and rotating with the output shaft. The seesaw assembly can swing around the swing axis of the seesaw assembly after being subjected to the resistance of the lubricating grease along the swing direction to make one end of the seesaw assembly tilt up; a magnet part is provided at the tiltable end of the seesaw assembly;

[0010] A magnetic induction sensor is arranged inside the pump base, electrically connected to the monitor, and located below the lowest point of the seesaw assembly. The magnet part and the magnetic induction sensor are located on the same circle with the output shaft as the center of the circle;

[0011] When the output shaft rotates forward, the monitor collects the signal of the magnetic induction sensor. If there is more grease, one end of the seesaw assembly rotating with the output shaft swings upward, and the magnet part moves out of the sensing range of the magnetic induction sensor; if there is less grease, the end of the seesaw assembly with the magnet part swings downward. When the magnet part rotates above the magnetic induction sensor, it can be sensed by the magnetic induction sensor to feedback a low liquid level signal to the monitor;

[0012] When the output shaft rotates in reverse, the monitor stops collecting the signal of the magnetic induction sensor.

[0013] The beneficial effects of this solution: During use, when the output shaft rotates forward, it drives the seesaw assembly to rotate accordingly. If there is more grease at this time, the side of the seesaw assembly facing the grease receives a greater resistance from the grease. After being blocked, it swings upward, and the magnet part installed on this side rises accordingly and moves out of the sensing range of the magnetic induction sensor. At this time, no low liquid level signal will be reported. When there is less grease, the resistance provided to the seesaw assembly decreases. Under the action of its own weight and rotational inertia, the side of the seesaw assembly facing the oil surface swings downward, driving the magnet part to move downward, so that the magnet part can enter the sensing range of the magnetic induction sensor. When the magnet part rotates above the magnetic induction sensor with the seesaw assembly, the magnetic induction sensor can sense and feedback a low liquid level signal to the monitor; when the output shaft rotates in reverse, at this time, the side away from the magnet part swings upward when there is more grease, and the magnet part is below. At this time, the signal detected by the magnetic induction sensor is contrary to the actual situation. Therefore, in the control strategy, the strategy of not collecting the signal of the magnetic induction sensor is adopted to avoid false alarms. Since the duration of each operation cycle (forward rotation + reverse rotation) of the dual-line distributor is not long, only detecting the signal of half a cycle can still accurately judge whether it is at a low liquid level. From the above working process and working principle, it can be seen that the solution of this application does not need to change too much of the original structure. Just adding a sensor and a magnet can achieve the low liquid level detection function, and it is very stable. The structure is very simple, the cost is very low, and it can stably solve the low liquid level alarm problem of the seesaw assembly. Cleverly using half-cycle detection can still accurately display whether it is at a low liquid level. Moreover, since the seesaw assembly must swing in the opposite direction when the output shaft rotates in reverse, this can also avoid the problem that the seesaw assembly is difficult to reset at a low liquid level due to grease adhesion on the seesaw assembly, thus ensuring more stable and reliable detection.

[0014] Furthermore, magnet parts are provided at both ends of the seesaw component, namely the first and second magnet parts. There are two magnetic induction sensors, namely the first and second magnetic induction sensors. The first magnet part and the first magnetic induction sensor are located on the same large circle with the output shaft as the center of the circle, and the second magnet part and the second magnetic induction sensor are located on the same small circle with the output shaft as the center of the circle. When the output shaft rotates forward, the monitor only collects the signal of the first magnetic induction sensor; when the output shaft rotates in reverse, the monitor only collects the signal of the second magnetic induction sensor.

[0015] Beneficial effects of this solution: This solution utilizes two sets of magnetic induction sensors and corresponding magnet parts. When the output shaft rotates forward, the first set can be used for detection and the second set is not used; when the output shaft rotates in reverse, the second set can be used for detection and the first set is not used. That is, real-time monitoring can be carried out throughout the cycle, improving the timeliness of low liquid level alarm.

[0016] Furthermore, an oil distribution plate with multiple oil passing holes is provided in the pump base below the seesaw component, and the magnetic induction sensor is installed on the oil distribution plate.

[0017] Furthermore, the magnetic induction sensor is a reed switch.

[0018] Furthermore, the magnet part is a neodymium iron boron magnet installed at the lower part of the seesaw component.

[0019] The technical solution of the dual-line lubricating pump of the present utility model is as follows: The dual-line lubricating pump includes a pump head component, and the pump head component includes:

[0020] A pump base;

[0021] A monitor;

[0022] A transmission mechanism, including an output shaft extending upward from the pump base into the fuel tank;

[0023] A seesaw component, swing-mounted at the upper end of the output shaft and rotating with the output shaft. The seesaw component can swing around the swing axis of the seesaw component to make one end of the seesaw component tilt up after being subjected to the grease resistance along the swing direction; a magnet part is provided at the tiltable end of the seesaw component;

[0024] A magnetic induction sensor, provided in the pump base, electrically connected to the monitor, and located below the lowest point of the seesaw component. The magnet part and the magnetic induction sensor are located on the same circle with the output shaft as the center of the circle;

[0025] When the output shaft rotates forward, the monitor collects the signal of the magnetic induction sensor. If there is more grease, one end of the seesaw component rotating with the output shaft swings upward and tilts up, and the magnet part moves out of the induction range of the magnetic induction sensor; if there is less grease, the end of the seesaw component with the magnet part swings downward, and when the magnet part rotates to be above the magnetic induction sensor, it can be sensed by the magnetic induction sensor to feed back a low liquid level signal to the monitor;

[0026] When the output shaft reverses, the monitor stops collecting magnetic induction sensor signals.

[0027] The beneficial effects of this solution are as follows: when in use, when the output shaft rotates forward, the seesaw assembly is driven to rotate accordingly. If there is more grease at this time, the side of the seesaw assembly facing the grease is subject to greater resistance from the grease, and after being blocked, it swings upward and tilts up, and the magnet portion installed on this side rises accordingly and leaves the sensing range of the magnetic induction sensor. At this time, no low liquid level signal is reported. When there is less grease, the resistance provided to the seesaw assembly is reduced. Under the action of its own weight and rotational inertia, the oil-facing side of the seesaw assembly swings downward, driving the magnet portion downward, so that the magnet portion can enter the magnetic induction sensor. In the sensing range, when the magnet part rotates with the seesaw assembly to the top of the magnetic induction sensor, the magnetic induction sensor can sense and feed back the low liquid level signal to the monitor; when the output shaft reverses, the side away from the magnet part is tilted when there is more grease, and the magnet part is at the bottom. At this time, the signal detected by the magnetic induction sensor is contrary to the actual situation. Therefore, the control strategy adopts the strategy of not collecting magnetic induction sensors to avoid false alarms. Since each operating cycle (forward + reverse) of the two-line distributor does not last long, only detecting the signal of half a cycle can still accurately determine whether it is in a low liquid level. It can be seen from the above working process and working principle that the solution of the present application does not need to change the original structure too much. It only adds a sensor and a magnet to realize the low liquid level detection function, and it is very stable. The structure is very simple, the cost is very low, and it can stably solve the low liquid level alarm problem with the seesaw assembly. The clever use of half-cycle detection can still accurately display whether it is in a low liquid level. Moreover, since the seesaw assembly must swing in the opposite direction when the output shaft is reversed, this can also avoid the problem of the seesaw assembly being difficult to reset at a low liquid level due to grease adhering to the seesaw assembly, thereby ensuring that the detection is more stable and reliable.

[0028] Furthermore, magnetic parts are provided at both ends of the seesaw assembly, namely the first and second magnetic parts, and there are two magnetic induction sensors, namely the first and second magnetic induction sensors. The first magnetic part and the first magnetic induction sensor are located on the same large circle with the output shaft as the center, and the second magnetic part and the second magnetic induction sensor are located on the same small circle with the output shaft as the center. When the output shaft rotates forward, the monitor only collects the first magnetic induction sensor signal; when the output shaft rotates reversely, the monitor only collects the second magnetic induction sensor signal.

[0029] The beneficial effects of this solution: This solution utilizes two sets of magnetic induction sensors and corresponding magnet parts. When the output shaft rotates forward, the first set of sensors can be used for detection without using the second set of sensors. When the output shaft rotates reversely, the second set of sensors can be used for detection without using the first set of sensors. That is, the entire cycle can be monitored in real time, thereby improving the timeliness of the low liquid level alarm.

[0030] Further, an oil distribution disc with a plurality of oil passing holes is provided below the seesaw assembly in the pump base, and the magnetic induction sensor is installed on the oil distribution disc.

[0031] Further, the magnetic induction sensor is a reed switch.

[0032] Further, the magnet part is a neodymium iron boron magnet installed at the lower part of the seesaw assembly. Description of the Drawings

[0033] Figure 1 It is a top view schematic diagram of Embodiment 1 of a pump head assembly of the present utility model;

[0034] Figure 2 It is a three-dimensional view of the seesaw assembly;

[0035] Figure 3 It is a schematic diagram of the working principle of the seesaw assembly;

[0036] Figure 4 It is a top view schematic diagram of Embodiment 2 of a pump head assembly of the present utility model;

[0037] In the figure: 1 - pump base, 2 - output shaft, 3 - seesaw assembly, 31 - horizontal shaft, 32 - seesaw, 33 - first magnet part, 34 - second magnet part, 4 - oil distribution disc, 5 - first magnetic induction sensor, 6 - second magnetic induction sensor. Detailed Embodiments

[0038] In order to make the objectives, technical solutions and advantages of the present utility model more clear and understandable, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model, that is, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Usually, the components of the embodiments of the present utility model described and shown in the accompanying drawings herein can be arranged and designed in various different configurations.

[0039] Therefore, the detailed description of the embodiments of the present utility model provided in the accompanying drawings is not intended to limit the scope of the claimed present utility model, but only represents the selected embodiments of the present utility model. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative efforts fall within the scope of protection of the present utility model.

[0040] It should be noted that relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprising", "including" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising one..." does not exclude the existence of additional identical elements in the process, method, article or device comprising the said element.

[0041] The features and performance of the present utility model will be further described in detail below in conjunction with the embodiments.

[0042] Embodiment 1 of a pump head assembly of the present utility model: The pump head assembly, as the core part of a double-line lubricating pump, mainly includes a pump base 1, a transmission mechanism, a seesaw assembly 3, an oil distribution plate 4, a magnetic induction sensor, and a monitor, a motor, a reduction mechanism, an eccentric wheel mechanism, a plunger pair, etc. not shown in the figure.

[0043] As Figure 1 shown, the pump base 1 includes a pump housing and an inner cavity, and most of the other components in the pump head assembly are installed outside the pump housing or in the inner cavity. The upper part of the pump base 1 has an opening of the inner cavity, and the oil distribution plate 4 is installed at the opening. The oil distribution plate 4 is a circular plate with holes. Above the oil distribution plate 4 is used to receive the grease from the oil tank. Below the oil distribution plate 4 mainly includes components such as a plunger pair, a transmission mechanism, a reduction mechanism, and a motor. The grease falls from the oil tank onto the oil distribution plate 4, is squeezed by the rotating seesaw assembly 3, and then moves downward through the holes on the oil distribution plate 4 to the plunger pair. The plunger pair is driven by the motor, the reduction mechanism, and the transmission mechanism to suck and pump out the grease, and the friction pair can be lubricated through the pipeline.

[0044] The transmission mechanism mainly refers to the transmission components between the reduction mechanism and the plunger pair, and mainly includes an output shaft 2, an eccentric wheel mechanism, etc. Among them, the output shaft 2 is arranged up and down along the axis of the pump head assembly, and the upper end of the output shaft 2 can pass through the oil distribution plate 4 and extend to the lower part of the oil tank, and the seesaw assembly 3 is installed at the upper end of the output shaft 2 and rotates with the rotation of the output shaft 2.

[0045] As Figure 2As shown, the seesaw assembly 3 mainly includes a horizontal shaft 31 vertically connected to the output shaft 2 and a seesaw rotatably mounted on the horizontal shaft 31. In this embodiment, two juxtaposed seesaws are provided. The seesaw is of a symmetric structure with both ends tilted upward and can swing up and down around the horizontal shaft 31. When one side tilts to a certain angle, the other side will contact the oil distribution plate 4, thereby restricting the tilting angle of the seesaw, and the tilting angle of the seesaw is an acute angle.

[0046] In this embodiment, as Figure 1 shown, magnet parts are mounted on the lower surfaces of both seesaws, such as neodymium iron boron magnets. The first magnet part 33 is located at the lower left of the first seesaw, and the second magnet part 34 is located at the lower right of the second seesaw.

[0047] As Figure 1 shown, two magnetic induction sensors are provided at a certain position on the oil distribution plate 4. The magnetic induction sensors are arranged in the pump base 1 and are located below the lowest point of the seesaw assembly 3. In this embodiment, they are located below the upper surface of the oil distribution plate 4. In this embodiment, reed switches are used as the magnetic induction sensors. The first magnet part 33 and the first magnetic induction sensor 5 are used in cooperation, that is, the first magnet part 33 and the first magnetic induction sensor 5 are located on the same large circle with the output shaft 2 as the center; the second magnet part 34 and the second magnetic induction sensor 6 are used in cooperation, that is, the second magnet part 34 and the second magnetic induction sensor 6 are located on the same small circle with the output shaft 2 as the center.

[0048] The signal lines of the two reed switches are respectively connected to the monitor from the inner cavity of the pump base 1. An alarm circuit is provided on the monitor. When the reed switch senses the magnet part, the alarm circuit is turned on, and the monitor can display and send a low liquid level alarm signal to the maintenance personnel for them to know, so as to replenish the lubricating grease in time.

[0049] During operation, when the output shaft 2 rotates forward ( Figure 1 in the clockwise direction in Figure 1 ), the first magnetic induction sensor 5 is used for detection and the second magnetic induction sensor 6 is not used. The forward rotation of the output shaft 2 drives the seesaw assembly 3 to rotate accordingly. If there is more lubricating grease at this time, the side of the seesaw assembly 3 facing the lubricating grease ( Figure 1The seesaw assembly 3 (left side) swings downward, driving the first magnet portion 33 to move downward, so that the first magnet portion 33 can enter the sensing range of the first magnetic induction sensor 5. When the first magnet portion 33 rotates to above the first magnetic induction sensor 5 along with the seesaw assembly 3, the first magnetic induction sensor 5 can sense and feed back a low liquid level signal to the monitor.

[0050] When output shaft 2 is reversed ( Figure 1 When the output shaft 2 is reversed, the seesaw assembly 3 rotates accordingly. If there is more grease at this time, the seesaw assembly 3 faces the side of the grease ( Figure 1 The side of the seesaw assembly 3 (on the right side in the middle) is subject to greater resistance from the grease, and after being blocked, it swings upward and tilts up, and the second magnet portion 34 installed on this side rises accordingly and leaves the sensing range of the second magnetic induction sensor 6, and no low liquid level signal is reported at this time; and when the grease is less, the resistance provided by the grease to the seesaw assembly 3 is reduced, and under the action of its own weight and rotational inertia, the oil surface side of the seesaw assembly 3 ( Figure 1 The second magnetic portion 34 moves downward (on the right side in the middle), driving the second magnetic portion 34 to move downward, so that the second magnetic portion 34 can enter the sensing range of the second magnetic induction sensor 6. When the second magnetic portion 34 rotates with the seesaw assembly 3 to above the second magnetic induction sensor 6, the second magnetic induction sensor 6 can sense and feed back a low liquid level signal to the monitor.

[0051] This solution utilizes two sets of magnetic induction sensors and corresponding magnet parts. When the output shaft 2 rotates forward, the first set can be used for detection without the second set, and when the output shaft 2 rotates reversely, the second set can be used for detection without the first set. That is, the entire cycle can be monitored in real time, thereby improving the timeliness of the low liquid level alarm.

[0052] Embodiment 2 of a pump head assembly of the utility model: Figure 4 As shown, only one magnetic induction sensor and one magnet part are provided. This set of combination can be the arrangement of the first magnetic induction sensor 5 and the first magnet part 33 as in Example 1, or the arrangement of the second magnetic induction sensor 6 and the second magnet part 34 as in Example 2. This embodiment takes the arrangement of the first magnetic induction sensor 5 and the first magnet part 33 as an example.

[0053] During use, when the output shaft 2 rotates forward, the seesaw assembly 3 is driven to rotate accordingly. If there is more grease at this time, the side of the seesaw assembly 3 facing the grease is subject to greater resistance from the grease, and after being blocked, it swings upward and tilts up, and the magnet portion installed on this side rises accordingly and leaves the sensing range of the magnetic induction sensor. At this time, no low liquid level signal is reported. When there is less grease, the resistance provided to the seesaw assembly 3 is reduced. Under the action of its own weight and rotational inertia, the side of the seesaw assembly 3 facing the oil surface swings down, driving the magnet portion to move downward, so that the magnet portion can enter the sensing range of the magnetic induction sensor. Range, when the magnet part rotates with the seesaw assembly 3 to the top of the magnetic induction sensor, the magnetic induction sensor can sense and feed back a low liquid level signal to the monitor; and when the output shaft 2 reverses, the side away from the magnet part is tilted when there is more grease, and the magnet part is at the bottom. At this time, the signal detected by the magnetic induction sensor is contrary to the actual situation. Therefore, the control strategy adopts a strategy of not collecting magnetic induction sensors to avoid false alarms. Since each operating cycle (forward + reverse) of the two-line distributor does not last long, only detecting the signal of half a cycle can still accurately determine whether it is in a low liquid level. It can be seen from the above working process and working principle that the solution of the present application does not need to change the original structure too much, but only adds a sensor and a magnet to realize the low liquid level detection function, and it is very stable, the structure is very simple, the cost is very low, and it can stably solve the low liquid level alarm problem with the seesaw assembly 3. The clever use of half-cycle detection can still accurately display whether it is in a low liquid level, and because the seesaw assembly 3 must swing in the opposite direction when the output shaft 2 reverses, this can also avoid the problem that the seesaw assembly 3 is difficult to reset at a low liquid level due to grease adhering to the seesaw assembly 3, thereby ensuring that the detection is more stable and reliable.

[0054] An embodiment of the dual-line lubrication pump of the present application: The dual-line lubrication pump includes a pump head assembly and an oil tank installed at the upper opening of the pump head assembly. The structure of the pump head assembly is the same as the structure in the above-mentioned embodiments of the pump head assembly and will not be repeated here.

[0055] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. The patent protection scope of the present invention shall be based on the claims. All equivalent structural changes made using the description and drawings of the present invention shall be included in the protection scope of the present invention.

Claims

1. A pump head assembly, characterized in that: include: Pump seat; Monitor; A transmission mechanism including an output shaft extending upward from the pump seat into the oil tank; The seesaw assembly is swingably mounted on the upper end of the output shaft and rotates with the output shaft. The seesaw assembly can swing around the swing axis of the seesaw assembly after being subjected to grease resistance in the swing direction so that one end of the seesaw assembly tilts up; the tiltable end of the seesaw assembly is provided with a magnet portion; A magnetic induction sensor is arranged in the pump seat, electrically connected to the monitor, and located below the lowest point of the seesaw assembly, and the magnet part and the magnetic induction sensor are located on the same circle with the output shaft as the center; When the output shaft rotates forward, the monitor collects the signal of the magnetic induction sensor. If there is more grease, one end of the seesaw assembly rotating with the output shaft swings upward, and the magnet part is out of the sensing range of the magnetic induction sensor. If there is less grease, one end of the magnet-mounted part of the seesaw assembly swings downward, and when the magnet part rotates to be above the magnetic induction sensor, it can be sensed by the magnetic induction sensor and the low liquid level signal is fed back to the monitor. When the output shaft reverses, the monitor stops collecting magnetic induction sensor signals.

2. The pump head assembly according to claim 1, characterized in that: Both ends of the seesaw assembly are provided with magnetic parts, namely the first and the second magnetic parts. There are two magnetic induction sensors, namely the first and the second magnetic induction sensors. The first magnetic part and the first magnetic induction sensor are located on the same large circle with the output shaft as the center, and the second magnetic part and the second magnetic induction sensor are located on the same small circle with the output shaft as the center. When the output shaft rotates forward, the monitor only collects the first magnetic induction sensor signal; when the output shaft rotates reversely, the monitor only collects the second magnetic induction sensor signal.

3. The pump head assembly according to claim 1 or 2, characterized in that: An oil distribution plate with a plurality of oil holes is arranged below the seesaw assembly in the pump seat, and a magnetic induction sensor is mounted on the oil distribution plate.

4. The pump head assembly according to claim 1, characterized in that: The magnetic induction sensor is a reed switch.

5. The pump head assembly according to claim 1, characterized in that: The magnet part is a neodymium iron boron magnet installed at the lower part of the seesaw assembly.

6. Dual-line lubrication pump, characterized in that: The pump head assembly comprises a pump head assembly and an oil tank installed at the upper opening of the pump head assembly. The pump head assembly comprises: Pump seat; Monitor; The transmission mechanism includes an output shaft extending upward from the pump seat to the oil tank; The seesaw assembly is swingably mounted on the upper end of the output shaft and rotates with the output shaft. The seesaw assembly can swing around the swing axis of the seesaw assembly after being subjected to grease resistance in the swing direction so that one end of the seesaw assembly tilts up; the tiltable end of the seesaw assembly is provided with a magnet portion; A magnetic induction sensor is arranged in the pump seat, electrically connected to the monitor, and located below the lowest point of the seesaw assembly, and the magnet portion and the magnetic induction sensor are located on the same circle with the output shaft as the center; When the output shaft rotates forward, the monitor collects the signal of the magnetic induction sensor. If there is more grease, one end of the seesaw assembly rotating with the output shaft swings upward, and the magnet part is out of the sensing range of the magnetic induction sensor. If there is less grease, one end of the magnet-mounted part of the seesaw assembly swings downward, and when the magnet part rotates to be above the magnetic induction sensor, it can be sensed by the magnetic induction sensor and the low liquid level signal is fed back to the monitor. When the output shaft reverses, the monitor stops collecting magnetic induction sensor signals.

7. The dual-line lubrication pump according to claim 6, characterized in that: Both ends of the seesaw assembly are provided with magnetic parts, namely the first and the second magnetic parts. There are two magnetic induction sensors, namely the first and the second magnetic induction sensors. The first magnetic part and the first magnetic induction sensor are located on the same large circle with the output shaft as the center, and the second magnetic part and the second magnetic induction sensor are located on the same small circle with the output shaft as the center. When the output shaft rotates forward, the monitor only collects the first magnetic induction sensor signal; when the output shaft rotates reversely, the monitor only collects the second magnetic induction sensor signal.

8. The dual-line lubrication pump according to claim 6 or 7, characterized in that: An oil distribution plate with a plurality of oil holes is arranged below the seesaw assembly in the pump seat, and a magnetic induction sensor is mounted on the oil distribution plate.

9. The dual-line lubrication pump according to claim 6, characterized in that: The magnetic induction sensor is a reed switch.

10. The dual-line lubrication pump according to claim 6, characterized in that: The magnet part is a neodymium iron boron magnet installed at the lower part of the seesaw assembly.

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