An injection lubrication system for a rack and pinion lifting system and its usage method

Abstract

A jet lubrication system for a rack and pinion lifting system, the jet lubrication system of the rack and pinion lifting system includes a motor, a multi-point lubrication pump, a lifting mechanism, a first jet oil circuit A, a second jet oil circuit B, and a third jet oil circuit C; a plurality of first gearboxes, second gearboxes, and third gearboxes are sequentially arranged on the side of the lifting mechanism, and the horizontal first gearbox, second gearbox, and third gearbox form a group of gear areas, and each group of gear areas is arranged in sequence from top to bottom along the longitudinal axis direction of the lifting mechanism. The horizontal first gearbox, second gearbox, and third gearbox are arranged in a triangular shape. One side of the first gearbox is connected to one side of the second gearbox through a first connecting plate, and the other side of the second gearbox is connected to one side of the third gearbox through a second connecting plate. The lubrication system of this design alternately sprays grease on the upper and lower layer lubrication points, which can reduce the demand for the number of oil outlets of the lubrication pump. Fewer lubrication pumps are required during lubrication, reducing costs.

Description

Technical Field

[0001] The present invention relates to the field of lubrication systems, and particularly to a jet lubrication system for a rack and pinion lifting system and a method for using the same. Background Art

[0002] In the field of offshore engineering technology, self-elevating offshore platforms are extremely widely used. As the core component of a self-elevating platform, the performance of the lifting system directly affects the safety and service effect of the platform. At present, the lifting systems of self-elevating platforms are roughly divided into two categories: rack and pinion type and pin type. Due to the advantages of fast lifting speed, simple operation, easy alignment with well positions, and high safety of the rack and pinion lifting system, the rack and pinion lifting system is mainly adopted for self-elevating platforms in the offshore engineering market at present.

[0003] The rack and pinion lifting system mainly drives the movement of the rack through the meshing action of the pinion and the rack, thereby completing the lifting process of the platform. Due to the large overall load of the platform, during the meshing process of the rack and pinion, lubrication plays an extremely important role in the service effect of the rack and pinion. Generally, the oil outlets of multi-point lubrication pumps are limited. When there are many points that need to be lubricated in the system, multiple lubrication pumps are required.

[0004] Chinese Patent Application No. CN202120395138.1, with an application date of February 23, 2021, discloses a guide rail oil injection lubrication system for a stretching machine, including an oil injection tank, an electric motor connected to the oil injection tank, a weighing sensor arranged below the oil injection tank, and the output information of the weighing sensor is transmitted to the PLC control system; the lubricating oil passes through the electric motor from the oil outlet to the oil distributor, and then is supplied to the guide rail through the oil supply port. This oil injection lubrication system is mainly designed to meet the high lubrication requirements of the guide rail in the stretching machine, and has various functions such as daily oil injection volume statistics, oil circuit blockage alarm, and low liquid level alarm, avoiding excessive wear of the guide rail caused by poor lubrication, thereby extending the service life of the guide rail and improving the processing accuracy of film stretching. However, it does not solve the problem of requiring multiple lubrication pumps during lubrication.

[0005] Disclosing the information of this background art section is only intended to increase the overall understanding of the present patent application, and should not be regarded as an admission or any form of implication that this information constitutes prior art already known to those of ordinary skill in the art. Summary of the Invention

[0006] The object of the present invention is to overcome the problem of requiring multiple lubrication pumps during lubrication in the prior art, and to provide a jet lubrication system for a rack and pinion lifting system and a method for using the same that require fewer lubrication pumps during lubrication.

[0007] To achieve the above object, the technical solution of the present invention is: a jet lubrication system for a rack and pinion lifting system, wherein the jet lubrication system for the rack and pinion lifting system includes a motor, a multi-point lubrication pump, a lifting mechanism, a first injection oil circuit, a second injection oil circuit, and a third injection oil circuit;

[0008] On the side of the lifting mechanism, a plurality of first gearboxes, second gearboxes, and third gearboxes are sequentially arranged. The horizontal first gearbox, second gearbox, and third gearbox form a set of gear areas, and each set of gear areas is arranged in sequence from top to bottom along the longitudinal axis of the lifting mechanism. The horizontal first gearbox, second gearbox, and third gearbox are arranged in a triangular shape. One side of the first gearbox is connected to one side of the second gearbox through a first connecting plate. The other side of the second gearbox is connected to one side of the third gearbox through a second connecting plate. The other side of the third gearbox is connected to the other side of the first gearbox through a third connecting plate. One side of the first connecting plate close to the first gearbox is connected to one end of a first fixing bracket. One side of the third connecting plate close to the first gearbox is connected to one end of a second fixing bracket. A first injection valve is arranged on the first fixing bracket, and a second injection valve is arranged on the second fixing bracket;

[0009] Two sets of first gears are arranged in the first gearbox, and the outer gear rings of the two sets of first gears mesh with the outside of the first pipe. Two sets of second gears are arranged in the second gearbox, and the outer gear rings of the two sets of second gears mesh with the outside of the second pipe. Two sets of third gears are arranged in the third gearbox, and the outer gear rings of the two sets of third gears mesh with the outside of the third pipe;

[0010] The first pipe, the second pipe, and the third pipe are connected through a connecting component;

[0011] The output end of the motor is connected to the multi-point lubrication pump. The oil outlet end of the multi-point lubrication pump is communicated with the oil inlet end of the first control oil circuit. The oil outlet end of the first control oil circuit is communicated with the oil inlet end of the first injection oil circuit. The oil outlet end of the multi-point lubrication pump is communicated with the oil inlet end of the second control oil circuit. The oil outlet end of the second control oil circuit is communicated with the oil inlet end of the second injection oil circuit. The oil outlet end of the multi-point lubrication pump is communicated with the oil inlet end of the third control oil circuit. The oil outlet end of the third control oil circuit is communicated with the oil inlet end of the third injection oil circuit. The electric control box is respectively communicated with the first control oil circuit, the second control oil circuit, and the third control oil circuit; Compressed air is communicated with the air inlet end of the pneumatic double unit. The air outlet end of the pneumatic double unit is communicated with the air inlet end of the third solenoid valve. The air outlet end of the third solenoid valve is communicated with the air inlet end of the pressure sensor. The air outlet end of the pressure sensor is respectively communicated with the oil inlet ends of the first injection oil circuit, the second injection oil circuit, and the third injection oil circuit.

[0012] The first pipe, the second pipe, and the third pipe have the same structure, and the first pipe, the second pipe, and the third pipe are arranged in a triangular shape.

[0013] The inlet end of the multi-point lubricating pump is communicated with the outlet end of the oil storage barrel, and a liquid level switch and a heating tape are arranged in the oil storage barrel.

[0014] The pneumatic two-piece includes a pressure reducing valve, a pressure gauge, and a filter. The inlet end of the pressure reducing valve is communicated with the outlet end of the multi-point lubricating pump. The outlet end of the pressure reducing valve is communicated with the inlet end of the pressure gauge. The outlet end of the pressure gauge is communicated with the inlet end of the filter. The outlet end of the filter is respectively communicated with the inlet ends of the first injection oil circuit, the second injection oil circuit, and the third injection oil circuit.

[0015] The structures of the first control oil circuit, the second control oil circuit, and the third control oil circuit are the same. The first control oil circuit includes a first branch, a second branch, a third branch, a fourth branch, a fifth branch, and a sixth branch. The structures of the first branch, the second branch, the third branch, the fourth branch, the fifth branch, and the sixth branch are the same. A first one-way valve, a pressure switch, and a pressure gauge are sequentially arranged on the first branch. The outlet end of the multi-point lubricating pump is communicated with the inlet end of the first one-way valve. The outlet end of the first one-way valve is communicated with the inlet end of the pressure switch. The outlet end of the pressure switch is communicated with the inlet end of the pressure gauge. The outlet end of the pressure gauge is communicated with the inlet end of the first injection oil circuit.

[0016] The inlet ends of the first one-way valves on the first branch, the second branch, the third branch, the fourth branch, the fifth branch, and the sixth branch are respectively communicated with the outlet end of the overflow valve.

[0017] The first injection oil circuit includes a first injection branch, a second injection branch, a third injection branch, a fourth injection branch, a fifth injection branch, and a sixth injection branch. The inlet end of the first injection branch is communicated with the outlet end of the first branch. The inlet end of the second injection branch is communicated with the outlet end of the second branch. The inlet end of the third injection branch is communicated with the outlet end of the third branch. The inlet end of the fourth injection branch is communicated with the outlet end of the fourth branch. The inlet end of the fifth injection branch is communicated with the outlet end of the fifth branch. The inlet end of the sixth injection branch is communicated with the outlet end of the sixth branch.

[0018] A first solenoid valve and a second solenoid valve are arranged on the first injection branch. The inlet end of the first solenoid valve is communicated with the outlet end of the first branch. The inlet end of the second solenoid valve is communicated with the outlet end of the first branch. The outlet end of the first solenoid valve is communicated with the inlet end of the first injection valve. The outlet end of the second solenoid valve is communicated with the inlet end of the second injection valve.

[0019] A method for using a jet lubrication system of a rack and pinion lifting system. The method includes a local control mode, which means: pressing the start button of the electric control box, the third solenoid valve is energized, compressed air passes through the pneumatic combination, the third solenoid valve, the pressure sensor, and the first control oil circuit to reach the first solenoid valve. The first solenoid valve is de-energized, and the compressed air reaches the first injection valve. After a few seconds, the first solenoid valve is energized, and the compressed air reaches the second injection valve. After the compressed air is opened for seconds, the multi-point lubrication pump operates and starts to supply grease. The grease passes through the overflow valve, the pressure gauge, and the first control oil circuit to reach the second solenoid valve. The second solenoid valve is de-energized, and the grease reaches the first injection valve. After a few seconds, the second solenoid valve is energized, and the grease reaches the second injection valve. Inside the first injection valve and the second injection valve, the compressed air blows the grease and sprays it onto the first gear surface of the lubrication point. By controlling the first solenoid valve and the second solenoid valve to alternately gain and lose power, the lubrication system alternately sprays grease onto the upper and lower layer lubrication points.

[0020] A method for using a jet lubrication system of a rack and pinion lifting system. The method further includes a remote control mode, and the remote control mode includes three modes: forced, follow, and automatic;

[0021] The forced mode means: it is basically the same as the local control mode, except that in the forced mode, the lubrication system is controlled at the lifting system control console, and in the local control mode, the lubrication system is controlled on the local electric control box;

[0022] The follow mode means: the start and stop of the lubricating oil circuit are determined by the start and stop of the lifting mechanism. After the lifting mechanism starts to operate, the lifting mechanism outputs a start signal to the lubricating oil circuit. After the lubricating oil circuit starts, it controls the third solenoid valve to be energized, and the compressed air passes through the pneumatic combination, the third solenoid valve, the pressure sensor, and the first control oil circuit to reach the first injection valve; after the compressed air is opened for seconds, it controls the multi-point lubrication pump to operate and start to supply grease. The grease passes through the overflow valve, the pressure gauge, and the first control oil circuit to reach the first injection valve; inside the first injection valve and the second injection valve, the compressed air blows the grease and sprays it onto the first gear surface of the lubrication point. When the lifting mechanism stops operating, the lifting mechanism outputs a stop signal to the lubricating oil circuit, and the lubricating oil circuit stops operating;

[0023] The automatic mode means that the start and stop of the lubricating oil circuit are determined by the start and stop of the lifting mechanism. Press the start button on the electric control box, and the third solenoid valve is energized. Compressed air passes through the pneumatic combination unit, the third solenoid valve, the pressure sensor, and the first control oil circuit to reach the first injection valve. After the compressed air is turned on, the multi-point lubrication pump is controlled to work, and grease supply starts. The grease passes through the overflow valve, the pressure gauge, and the first control oil circuit to reach the first injection valve. In the first injection valve and the second injection valve, the compressed air blows the grease and sprays it onto the first gear surface of the lubrication point. When the operating time of the lubricating oil circuit reaches the set working time, the motor stops working, the third solenoid valve is de-energized, and the system enters the pause cycle. When the pause cycle reaches the set value, the motor works again, and the system enters the next lubrication cycle, and so on in a cycle.

[0024] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0025] 1. In the injection lubrication system and its usage method of a gear-rack lifting system according to the present invention, the oil outlet end of the multi-point lubrication pump is connected to the oil inlet end of the pneumatic combination unit, the oil outlet end of the pneumatic combination unit is connected to the oil inlet end of the third solenoid valve, the oil outlet end of the third solenoid valve is connected to the oil inlet end of the pressure sensor, and the oil outlet end of the pressure sensor is respectively connected to the oil inlet ends of the first injection oil circuit A, the second injection oil circuit B, and the third injection oil circuit C. The multi-point lubrication pump works and starts to supply grease. The grease passes through the overflow valve, the pressure gauge, and the first control oil circuit to reach the second solenoid valve. The second solenoid valve is de-energized, and the grease reaches the first injection valve. After a few seconds, the second solenoid valve is energized, and the grease reaches the second injection valve. In the first injection valve and the second injection valve, the compressed air blows the grease and sprays it onto the first gear surface of the lubrication point. The system alternately energizes and de-energizes the first solenoid valve and the second solenoid valve to alternately spray grease for the upper and lower layer lubrication points by the lubrication system, which can reduce the requirement for the number of oil outlet ports of the lubrication pump. Fewer lubrication pumps are required during lubrication, reducing costs. Therefore, this design uses fewer lubrication pumps and reduces costs.

[0026] 2. In the jet lubrication system and its usage method of a gear-rack lifting system according to the present invention, the structures of the first control oil circuit, the second control oil circuit, and the third control oil circuit are the same. The first control oil circuit includes a first branch, a second branch, a third branch, a fourth branch, a fifth branch, and a sixth branch. A first one-way valve, a pressure switch, and a pressure gauge are sequentially arranged on the first branch. The oil outlet end of the multi-point lubrication pump is communicated with the oil inlet end of the first one-way valve. The oil outlet end of the first one-way valve is communicated with the oil inlet end of the pressure switch. The oil outlet end of the pressure switch is communicated with the oil inlet end of the pressure gauge. The oil outlet end of the pressure gauge is communicated with the oil inlet end of the first injection oil circuit A. When a jet valve at a certain lubrication point is blocked, the grease pressure increases, and the grease reaches the pressure switch through the one-way valve. When the pressure on the supply oil pipeline exceeds the set pressure of the overflow valve, the pressure switch issues a blockage alarm, and the grease flows out through the overflow valve. Since the return oil of the overflow valve is not connected back to the oil storage barrel, it is possible to determine whether the lubrication point is blocked by whether there is grease flowing out of the overflow valve. Therefore, this design can verify whether the lubrication point is blocked and is more convenient to use.

[0027] 3. In the jet lubrication system and its usage method of a gear-rack lifting system according to the present invention, in the local control mode, the system is provided with a timer. When the operating time of the lubrication system reaches the set working time, the electric pump stops working, the third solenoid valve loses power, and the system enters a pause cycle. When the pause cycle reaches the set value, the high-pressure electric pump works again, and the system enters the next lubrication cycle. This cycle repeats. When the lubricant in the fuel tank is lower than the lowest point, causing the liquid level relay to alarm, the entire system will be forced to stop working. Therefore, this design is safe to use and has intelligent alarm. Brief Description of the Drawings

[0028] Figure 1 is a schematic structural diagram of the present invention.

[0029] Figure 2 is a top view of the present invention.

[0030] Figure 3 is a cross-sectional view of the present invention.

[0031] Figure 4 is a schematic diagram of the oil circuit in the present invention.

[0032] Figure 5 is a schematic structural diagram of the first control oil circuit in the present invention.

[0033] Figure 6 is a schematic structural diagram of the pneumatic combination in the present invention.

[0034] Figure 7 is a schematic structural diagram of the first injection oil circuit A in the present invention.

[0035] Figure 8It is a schematic structural diagram of the oil storage barrel in the present invention.

[0036] Figure 9 It is a schematic structural diagram of the first branch in the present invention.

[0037] In the figure: motor 1, multi-point lubricating pump 2, first control oil circuit 22, second control oil circuit 23, third control oil circuit 24, oil storage barrel 3, electric control box 4, first one-way valve 5, pressure switch 6, overflow valve 7, pressure gauge 8, first injection branch 91, second injection branch 92, third injection branch 93, fourth injection branch 94, fifth injection branch 95, sixth injection branch 96, first solenoid valve 10, second solenoid valve 101, first injection valve 111, second injection valve 112, pneumatic combination 12, pressure reducing valve 121, pressure gauge 122, filter 123, third solenoid valve 13, pressure sensor 14, lifting mechanism 15, second side pipe 162, second side pipe 162, third side pipe 163, first gear 171, second gear 172, third gear 173, first gear box 181, second gear box 182, third gear box 183, first connecting plate 191, second connecting plate 192, third connecting plate 193, connecting component 20, first fixing bracket 21, second fixing bracket 211, first branch 221, second branch 222, third branch 223, fourth branch 224, fifth branch 225, sixth branch 226, first injection oil circuit A, second injection oil circuit B, third injection oil circuit C. Detailed implementation mode

[0038] The present invention will be further described in detail below with reference to the attached drawings and specific implementation modes.

[0039] See Figures 1 to 9 , a jet lubrication system for a rack and pinion lifting system, the jet lubrication system for the rack and pinion lifting system includes a motor 1, a multi-point lubricating pump 2, a lifting mechanism 15, a first injection oil circuit A, a second injection oil circuit B, and a third injection oil circuit C;

[0040] On the side of the lifting mechanism 15, a plurality of first gearboxes 181, second gearboxes 182, and third gearboxes 183 are sequentially arranged. The horizontal first gearbox 181, second gearbox 182, and third gearbox 183 form a set of gear areas, and each set of gear areas is arranged in sequence from top to bottom along the longitudinal axis of the lifting mechanism 15. The horizontal first gearbox 181, second gearbox 182, and third gearbox 183 are arranged in a triangular shape. One side of the first gearbox 181 is connected to one side of the second gearbox 182 through a first connecting plate 191. The other side of the second gearbox 182 is connected to one side of the third gearbox 183 through a second connecting plate 192. The other side of the third gearbox 183 is connected to the other side of the first gearbox 181 through a third connecting plate 193. One side of the first connecting plate 191 close to the first gearbox 181 is connected to one end of the first fixing bracket 211. One side of the third connecting plate 193 close to the first gearbox 181 is connected to one end of the second fixing bracket 21. A first injection valve 111 is arranged on the first fixing bracket 21, and a second injection valve 112 is arranged on the second fixing bracket 211;

[0041] Two sets of first gears 171 are arranged in the first gearbox 181, and the outer gear rings of the two sets of first gears 171 are meshed with the outer side of the first side pipe 161. Two sets of second gears 172 are arranged in the second gearbox 182, and the outer gear rings of the two sets of second gears 172 are meshed with the outer side of the second side pipe 162. Two sets of third gears 173 are arranged in the third gearbox 183, and the outer gear rings of the two sets of third gears 173 are meshed with the outer side of the third side pipe 163;

[0042] The first side pipe 161, the second side pipe 162, and the third side pipe 163 are connected through a connecting component 20;

[0043] The output end of the motor 1 is connected to the multi-point lubricating pump 2. The oil outlet end of the multi-point lubricating pump 2 is communicated with the oil inlet end of the first control oil circuit 22. The oil outlet end of the first control oil circuit 22 is communicated with the oil inlet end of the first injection oil circuit A. The oil outlet end of the multi-point lubricating pump 2 is communicated with the oil inlet end of the second control oil circuit 23. The oil outlet end of the second control oil circuit 23 is communicated with the oil inlet end of the second injection oil circuit B. The oil outlet end of the multi-point lubricating pump 2 is communicated with the oil inlet end of the third control oil circuit 24. The oil outlet end of the third control oil circuit 24 is communicated with the oil inlet end of the third injection oil circuit C. The electric control box 4 is respectively communicated with the first control oil circuit 22, the second control oil circuit 23, and the third control oil circuit 24; Compressed air is communicated with the air inlet end of the pneumatic combination 12. The air outlet end of the pneumatic combination 12 is communicated with the air inlet end of the third solenoid valve 13. The air outlet end of the third solenoid valve 13 is communicated with the air inlet end of the pressure sensor 14. The air outlet end of the pressure sensor 14 is respectively communicated with the oil inlet ends of the first injection oil circuit A, the second injection oil circuit B, and the third injection oil circuit C.

[0044] The structures of the first side pipe 161, the second side pipe 162, and the third side pipe 163 are the same, and the first side pipe 161, the second side pipe 162, and the third side pipe 163 are arranged in a triangular shape.

[0045] The oil inlet end of the multi-point lubricating pump 2 is communicated with the oil outlet end of the oil storage barrel 3, and a liquid level switch and a heating belt are arranged in the oil storage barrel 3.

[0046] The pneumatic combination unit 12 includes a pressure reducing valve 121, a pressure gauge 122, and a filter 123. The oil inlet end of the pressure reducing valve 121 is communicated with the oil outlet end of the multi-point lubricating pump 2, the oil outlet end of the pressure reducing valve 121 is communicated with the oil inlet end of the pressure gauge 122, the oil outlet end of the pressure gauge 122 is communicated with the oil inlet end of the filter 123, and the oil outlet end of the filter 123 is respectively communicated with the oil inlet ends of the first injection oil circuit A, the second injection oil circuit B, and the third injection oil circuit C.

[0047] The structures of the first control oil circuit 22, the second control oil circuit 23, and the third control oil circuit 24 are the same. The first control oil circuit 22 includes a first branch 221, a second branch 222, a third branch 223, a fourth branch 224, a fifth branch 225, and a sixth branch 226. The structures of the first branch 221, the second branch 222, the third branch 223, the fourth branch 224, the fifth branch 225, and the sixth branch 226 are the same. A first check valve 5, a pressure switch 6, and a pressure gauge 8 are sequentially arranged on the first branch 221. The oil outlet end of the multi-point lubricating pump 2 is communicated with the oil inlet end of the first check valve 5, the oil outlet end of the first check valve 5 is communicated with the oil inlet end of the pressure switch 6, the oil outlet end of the pressure switch 6 is communicated with the oil inlet end of the pressure gauge 8, and the oil outlet end of the pressure gauge 8 is communicated with the oil inlet end of the first injection oil circuit A.

[0048] The oil inlet ends of the first check valves 5 on the first branch 221, the second branch 222, the third branch 223, the fourth branch 224, the fifth branch 225, and the sixth branch 226 are respectively communicated with the oil outlet end of the relief valve 7.

[0049] The first injection oil circuit A includes a first injection branch 91, a second injection branch 92, a third injection branch 93, a fourth injection branch 94, a fifth injection branch 95, and a sixth injection branch 96. The oil inlet end of the first injection branch 91 is communicated with the oil outlet end of the first branch 221, the oil inlet end of the second injection branch 92 is communicated with the oil outlet end of the second branch 222, the oil inlet end of the third injection branch 93 is communicated with the oil outlet end of the third branch 223, the oil inlet end of the fourth injection branch 94 is communicated with the oil outlet end of the fourth branch 224, the oil inlet end of the fifth injection branch 95 is communicated with the oil outlet end of the fifth branch 225, and the oil inlet end of the sixth injection branch 96 is communicated with the oil outlet end of the sixth branch 226.

[0050] A first electromagnetic valve 10 and a second electromagnetic valve 101 are arranged on the first injection branch 91. The oil inlet end of the first electromagnetic valve 10 is communicated with the oil outlet end of the first branch 221, and the oil inlet end of the second electromagnetic valve 101 is communicated with the oil outlet end of the first branch 221. The oil outlet end of the first electromagnetic valve 10 is communicated with the oil inlet end of the first injection valve 111, and the oil outlet end of the second electromagnetic valve 101 is communicated with the oil inlet end of the second injection valve 112.

[0051] A usage method of an injection lubrication system for a rack and pinion lifting system. The usage method includes a local control mode, which refers to: pressing the start button of the electric control box 4, the third electromagnetic valve 13 is powered on, compressed air passes through the pneumatic combination 12, the third electromagnetic valve 13, the pressure sensor 14, and the first control oil circuit 22 to reach the first electromagnetic valve 10, the first electromagnetic valve 10 is powered off, the compressed air reaches the first injection valve 111, after a few seconds, the first electromagnetic valve 10 is powered on, the compressed air reaches the second injection valve 112, after the compressed air is turned on for 5 seconds, the multi-point lubrication pump 2 operates, and starts to supply grease. The grease passes through the overflow valve 7, the pressure gauge 8, and the first control oil circuit 22 to reach the second electromagnetic valve 101, the second electromagnetic valve 101 is powered off, the grease reaches the first injection valve 111, after a few seconds, the second electromagnetic valve 101 is powered on, the grease reaches the second injection valve 112. In the first injection valve 111 and the second injection valve 112, the compressed air blows the grease and sprays it onto the surface of the lubrication point, the first gear 171. By controlling the first electromagnetic valve 10 and the second electromagnetic valve 101 to alternately lose and gain power, the lubrication system alternately sprays grease for the upper and lower layer lubrication points.

[0052] The usage method further includes a remote control mode, and the remote control mode includes three modes: forced, following, and automatic;

[0053] The forced mode refers to: being basically the same as the local control mode, except that in the forced mode, the lubrication system is controlled at the lifting system control console, and in the local control mode, the lubrication system is controlled on the local electric control box 4;

[0054] The following mode refers to: the start and stop of the lubricating oil circuit are determined by the start and stop of the lifting mechanism 15. After the lifting mechanism 15 starts to operate, the lifting mechanism 15 outputs a start signal to the lubricating oil circuit. After the lubricating oil circuit is started, it controls the third electromagnetic valve 13 to be powered on, and the compressed air passes through the pneumatic combination 12, the third electromagnetic valve 13, the pressure sensor 14, and the first control oil circuit 22 to reach the first injection valve 111; after the compressed air is turned on for 5 seconds, it controls the multi-point lubrication pump 2 to operate and start to supply grease. The grease passes through the overflow valve 7, the pressure gauge 8, and the first control oil circuit 22 to reach the first injection valve 111; in the first injection valve 111 and the second injection valve 112, the compressed air blows the grease and sprays it onto the surface of the lubrication point, the first gear 171. When the lifting mechanism 15 stops operating, the lifting mechanism 15 outputs a stop signal to the lubricating oil circuit, and the lubricating oil circuit stops operating;

[0055] The automatic mode means that the start and stop of the lubricating oil circuit are determined by the start and stop of the lifting mechanism 15. Press the start button of the electric control box 4, and the third solenoid valve 13 is energized. Compressed air passes through the pneumatic combination unit 12, the third solenoid valve 13, the pressure sensor 14, and the first control oil circuit 22 to reach the first injection valve 111. After the compressed air is turned on for 5 seconds, the multi-point lubricating pump 2 is controlled to work, and the grease supply starts. The grease passes through the overflow valve 7, the pressure gauge 8, and the first control oil circuit 22 to reach the first injection valve 111. In the first injection valve 111 and the second injection valve 112, the compressed air blows the grease and sprays it onto the surface of the first gear 171 at the lubrication point. The system is provided with a timer. When the operating time of the lubricating oil circuit reaches the set working time, the motor 1 stops working, and the third solenoid valve 13 loses power. The system enters the pause cycle. When the pause cycle reaches the set value, the motor 1 works again, and the system enters the next lubrication cycle. This cycle repeats continuously. When the lubricant in the oil storage barrel 3 is lower than the lowest point, causing the liquid level relay to alarm, the entire system will be forced to stop working, or stop by manual intervention.

[0056] Embodiment 1: A jet lubrication system for a rack and pinion lifting system. The jet lubrication system of the rack and pinion lifting system includes a motor 1, a multi-point lubrication pump 2, a lifting mechanism 15, a first injection oil circuit A, a second injection oil circuit B, and a third injection oil circuit C. A plurality of first gearboxes 181, second gearboxes 182, and third gearboxes 183 are sequentially arranged on the side of the lifting mechanism 15. The horizontal first gearbox 181, second gearbox 182, and third gearbox 183 form a set of gear areas, and each set of gear areas is arranged in sequence from top to bottom along the longitudinal axis direction of the lifting mechanism 15. The horizontal first gearbox 181, second gearbox 182, and third gearbox 183 are arranged in a triangular shape. One side of the first gearbox 181 is connected to one side of the second gearbox 182 through a first connecting plate 191, the other side of the second gearbox 182 is connected to one side of the third gearbox 183 through a second connecting plate 192, and the other side of the third gearbox 183 is connected to the other side of the first gearbox 181 through a third connecting plate 193. One side of the first connecting plate 191 close to the first gearbox 181 is connected to one end of a first fixing bracket 211, and one side of the third connecting plate 193 close to the first gearbox 181 is connected to one end of a second fixing bracket 21. A first injection valve 111 is arranged on the first fixing bracket 21, and a second injection valve 112 is arranged on the second fixing bracket 211. Two sets of first gears 171 are arranged in the first gearbox 181, and the outer gear rings of the two sets of first gears 171 are meshed with the outside of the first pipe 161. Two sets of second gears 172 are arranged in the second gearbox 182, and the outer gear rings of the two sets of second gears 172 are meshed with the outside of the second pipe 162. Two sets of third gears 173 are arranged in the third gearbox 183, and the outer gear rings of the two sets of third gears 173 are meshed with the outside of the third pipe 163. The first pipe 161, the second pipe 162, and the third pipe 163 are connected through a connecting component 20. The output end of the motor 1 is connected to the multi-point lubrication pump 2. The oil outlet end of the multi-point lubrication pump 2 is communicated with the oil inlet end of the first control oil circuit 22. The oil outlet end of the first control oil circuit 22 is communicated with the oil inlet end of the first injection oil circuit A. The oil outlet end of the multi-point lubrication pump 2 is communicated with the oil inlet end of the second control oil circuit 23. The oil outlet end of the second control oil circuit 23 is communicated with the oil inlet end of the second injection oil circuit B. The oil outlet end of the multi-point lubrication pump 2 is communicated with the oil inlet end of the third control oil circuit 24. The oil outlet end of the third control oil circuit 24 is communicated with the oil inlet end of the third injection oil circuit C. The electric control box 4 is respectively communicated with the first control oil circuit 22, the second control oil circuit 23, and the third control oil circuit 24. The electric control box 4 controls the lubrication system;The compressed air is communicated with the intake end of the pneumatic combination unit 12. The outlet end of the pneumatic combination unit 12 is communicated with the intake end of the third electromagnetic valve 13. The outlet end of the third electromagnetic valve 13 is communicated with the intake end of the pressure sensor 14. The outlet end of the pressure sensor 14 is respectively communicated with the oil inlet ends of the first injection oil circuit A, the second injection oil circuit B, and the third injection oil circuit C. The third electromagnetic valve 13 controls the on / off of the compressed air, and the pressure sensor 14 detects the pressure of the source compressed air.;

[0057] A usage method of a jet lubrication system for a gear-rack lifting system. The usage method includes a local control mode, and the local control mode means: Press the start button of the electric control box 4, the third electromagnetic valve 13 is powered on, the compressed air passes through the pneumatic combination unit 12, the third electromagnetic valve 13, the pressure sensor 14, and the first control oil circuit 22 to reach the first electromagnetic valve 10. The first electromagnetic valve 10 is de-energized, and the compressed air reaches the first injection valve 111. After a few seconds, the first electromagnetic valve 10 is powered on, and the compressed air reaches the second injection valve 112. After the compressed air is turned on for 5 seconds, the multi-point lubrication pump 2 operates to start supplying grease. The grease passes through the overflow valve 7, the pressure gauge 8, and the first control oil circuit 22 to reach the second electromagnetic valve 101. The second electromagnetic valve 101 is de-energized, and the grease reaches the first injection valve 111. After a few seconds, the second electromagnetic valve 101 is powered on, and the grease reaches the second injection valve 112. Inside the first injection valve 111 and the second injection valve 112, the compressed air blows the grease and sprays it onto the surface of the lubrication point, the first gear 171. By controlling the alternate power-on and power-off of the first electromagnetic valve 10 and the second electromagnetic valve 101, the lubrication system alternately sprays grease onto the upper and lower layer lubrication points.

[0058] The lubrication system alternately spraying grease onto the upper and lower layer lubrication points can reduce the requirement for the number of oil outlet ports of the lubrication pump. In the local mode, the lubrication system will not stop working until the grease in the oil storage barrel 3 is lower than the lowest point, causing the liquid level switch to alarm, and the entire system will be forced to stop working or stop by manual intervention.

[0059] Example 2: Example 2 is basically the same as Example 1, and the difference is as follows:

[0060] A jet lubrication system for a rack and pinion lifting system. The structures of the first side pipe 161, the second side pipe 162, and the third side pipe 163 are the same, and the first side pipe 161, the second side pipe 162, and the third side pipe 163 are arranged in a triangular shape; the oil inlet end of the multi-point lubrication pump 2 is communicated with the oil outlet end of the oil storage barrel 3. A liquid level switch and a heating belt are arranged in the oil storage barrel 3. When the lubricating grease level in the oil storage barrel 3 is low, the liquid level switch will give an alarm. When the ambient temperature is low, starting the heating belt can heat the lubricating grease in the oil storage barrel 3; the pneumatic combination 12 includes a pressure reducing valve 121, a pressure gauge 122, and a filter 123. The oil inlet end of the pressure reducing valve 121 is communicated with the oil outlet end of the multi-point lubrication pump 2, the oil outlet end of the pressure reducing valve 121 is communicated with the oil inlet end of the pressure gauge 122, the oil outlet end of the pressure gauge 122 is communicated with the oil inlet end of the filter 123, and the oil outlet end of the filter 123 is respectively communicated with the oil inlet ends of the first injection oil circuit A, the second injection oil circuit B, and the third injection oil circuit C.

[0061] Example 3: Example 3 is basically the same as Example 1, and the difference is that:

[0062] A jet lubrication system for a rack and pinion lifting system. The structures of the first control oil circuit 22, the second control oil circuit 23, and the third control oil circuit 24 are the same. The first control oil circuit 22 includes a first branch 221, a second branch 222, a third branch 223, a fourth branch 224, a fifth branch 225, and a sixth branch 226. The structures of the first branch 221, the second branch 222, the third branch 223, the fourth branch 224, the fifth branch 225, and the sixth branch 226 are the same. A first one-way valve 5, a pressure switch 6, and a pressure gauge 8 are sequentially arranged on the first branch 221. The oil outlet end of the multi-point lubrication pump 2 is communicated with the oil inlet end of the first one-way valve 5. The oil outlet end of the first one-way valve 5 is communicated with the oil inlet end of the pressure switch 6. The oil outlet end of the pressure switch 6 is communicated with the oil inlet end of the pressure gauge 8. The oil outlet end of the pressure gauge 8 is communicated with the oil inlet end of the first injection oil circuit A. The function of the first one-way valve 5 is to introduce grease into the pressure switch 6; the function of the pressure switch 6 is to give an alarm when the lubrication system pressure is large; the function of the relief valve 7 is to provide safety pressure protection for the lubrication system. The oil return port of the relief valve 7 is not connected back to the oil storage barrel 3. When the lubrication point is blocked, the grease flows out through the relief valve 7, which can facilitate observing the specific blocked lubrication point; the function of the pressure gauge 8 is to detect the lubrication system pressure; the oil inlet ends of the first one-way valves 5 on the first branch 221, the second branch 222, the third branch 223, the fourth branch 224, the fifth branch 225, and the sixth branch 226 are respectively communicated with the oil outlet end of the relief valve; the first injection oil circuit A includes a first injection branch 91, a second injection branch 92, a third injection branch 93, a fourth injection branch 94, a fifth injection branch 95, and a sixth injection branch 96. The oil inlet end of the first injection branch 91 is communicated with the oil outlet end of the first branch 221. The oil inlet end of the second injection branch 92 is communicated with the oil outlet end of the second branch 222. The oil inlet end of the third injection branch 93 is communicated with the oil outlet end of the third branch 223. The oil inlet end of the fourth injection branch 94 is communicated with the oil outlet end of the fourth branch 224. The oil inlet end of the fifth injection branch 95 is communicated with the oil outlet end of the fifth branch 225. The oil inlet end of the sixth injection branch 96 is communicated with the oil outlet end of the sixth branch 226; a first solenoid valve 10 and a second solenoid valve 101 are arranged on the first injection branch 91. The oil inlet end of the first solenoid valve 10 is communicated with the oil outlet end of the first branch 221. The oil inlet end of the second solenoid valve 101 is communicated with the oil outlet end of the first branch 221. The oil outlet end of the first solenoid valve 10 is communicated with the oil inlet end of the first injection valve 111. The oil outlet end of the second solenoid valve 101 is communicated with the oil inlet end of the second injection valve 112. The first solenoid valve 10 provides compressed air for the first injection valve 111 and the second injection valve 112 by alternately gaining and losing power of the solenoid valve. The second solenoid valve 101 alternately gains and loses power to provide grease for the first injection valve 111 and the second injection valve 112.

[0063] Example 4: Example 4 is basically the same as Example 1, and the difference is that:

[0064] A method for using a jet lubrication system of a rack and pinion lifting system. The method further includes a remote control mode, which includes three modes: forced, follow, and automatic. The forced mode means: it is basically the same as the local control mode, except that in the forced mode, the lubrication system is controlled at the lifting system console, and in the local control mode, the lubrication system is controlled at the local electric control box 4. The follow mode means: the start and stop of the lubricating oil circuit are determined by the start and stop of the lifting mechanism 15. After the lifting mechanism 15 starts running, the lifting mechanism 15 outputs a start signal to the lubricating oil circuit. After the lubricating oil circuit starts, it controls the three-way solenoid valve 13 to be energized, and the compressed air passes through the pneumatic combination 12, the third solenoid valve 13, the pressure sensor 14, and the first control oil circuit 22 to reach the first injection valve 111. After the compressed air is turned on for 5 seconds, it controls the multi-point lubricating pump 2 to work and starts to supply grease. The grease passes through the overflow valve 7, the pressure gauge 8, and the first control oil circuit 22 to reach the first injection valve 111. In the first injection valve 111 and the second injection valve 112, the compressed air blows the grease and sprays it onto the surface of the first gear 171 at the lubrication point. When the lifting mechanism 15 stops running, the lifting mechanism 15 outputs a stop signal to the lubricating oil circuit, and the lubricating oil circuit stops running. The automatic mode means: the start and stop of the lubricating oil circuit are determined by the start and stop of the lifting mechanism 15. Press the start button on the electric control box 4, the third solenoid valve 13 is energized, and the compressed air passes through the pneumatic combination 12, the third solenoid valve 13, the pressure sensor 14, and the first control oil circuit 22 to reach the first injection valve 111. After the compressed air is turned on for 5 seconds, it controls the multi-point lubricating pump 2 to work and starts to supply grease. The grease passes through the overflow valve 7, the pressure gauge 8, and the first control oil circuit 22 to reach the first injection valve 111. In the first injection valve 111 and the second injection valve 112, the compressed air blows the grease and sprays it onto the surface of the first gear 171 at the lubrication point. The system is provided with a timer. When the running time of the lubricating oil circuit reaches the set working time, the motor 1 stops working, the third solenoid valve 13 loses power, and the system enters a pause cycle. When the pause cycle reaches the set value, the motor 1 works again, and the system enters the next lubrication cycle, and so on.

[0065] When the lubricant in the oil storage barrel 3 is lower than the lowest point, causing the liquid level relay to alarm, the entire system will be forced to stop working, or stop by manual intervention. When a jet valve at a lubrication point is blocked, the grease pressure increases, and the grease reaches the pressure switch 6 through the one-way valve. When the pressure on the oil supply pipeline exceeds the set pressure of the overflow valve 7, the pressure switch 6 issues a blockage alarm, and the grease flows out through the overflow valve 7. Since the return oil of the overflow valve 7 is not connected back to the oil storage barrel 3, it is possible to judge whether the lubrication point is blocked by whether there is grease flowing out of the overflow valve 7.

[0066] The above are only the preferred embodiments of the present invention, and the protection scope of the present invention is not limited to the above embodiments. Any equivalent modifications or changes made by those of ordinary skill in the art according to the disclosure of the present invention shall fall within the protection scope recorded in the claims.

Claims

1. An injection lubrication system for a rack and pinion lifting system, characterized in that: The jet lubrication system of the described rack and pinion lifting system includes a motor (1), a multi-point lubrication pump (2), a lifting mechanism (15), a first injection oil circuit (A), a second injection oil circuit (B), and a third injection oil circuit (C); On the side of the lifting mechanism (15), a plurality of first gearboxes (181), second gearboxes (182), and third gearboxes (183) are sequentially arranged. The horizontal first gearbox (181), second gearbox (182), and third gearbox (183) form a set of gear areas. Each set of gear areas is arranged in sequence from top to bottom along the longitudinal axis of the lifting mechanism (15). The horizontal first gearbox (181), second gearbox (182), and third gearbox (183) are arranged in a triangular shape. One side of the first gearbox (181) is connected to one side of the second gearbox (182) through a first connecting plate (191). The other side of the second gearbox (182) is connected to one side of the third gearbox (183) through a second connecting plate (192). The other side of the third gearbox (183) is connected to the other side of the first gearbox (181) through a third connecting plate (193). One side of the first connecting plate (191) close to the first gearbox (181) is connected to one end of a first fixing bracket (21). One side of the third connecting plate (193) close to the first gearbox (181) is connected to one end of a second fixing bracket (211). A first injection valve (111) is arranged on the first fixing bracket (21), and a second injection valve (112) is arranged on the second fixing bracket (211); Two sets of first gears (171) are arranged in the first gearbox (181). The outer gear rings of the two sets of first gears (171) are meshed with the outer side of the first side pipe (161). Two sets of second gears (172) are arranged in the second gearbox (182). The outer gear rings of the two sets of second gears (172) are meshed with the outer side of the second side pipe (162). Two sets of third gears (173) are arranged in the third gearbox (183). The outer gear rings of the two sets of third gears (173) are meshed with the outer side of the third side pipe (163); The first side pipe (161), the second side pipe (162), and the third side pipe (163) are connected through a connecting component (20); The output end of the motor (1) is connected to the multi-point lubricating pump (2). The oil outlet end of the multi-point lubricating pump (2) is communicated with the oil inlet end of the first control oil circuit (22). The oil outlet end of the first control oil circuit (22) is communicated with the oil inlet end of the first injection oil circuit (A). The oil outlet end of the multi-point lubricating pump (2) is communicated with the oil inlet end of the second control oil circuit (23). The oil outlet end of the second control oil circuit (23) is communicated with the oil inlet end of the second injection oil circuit (B). The oil outlet end of the multi-point lubricating pump (2) is communicated with the oil inlet end of the third control oil circuit (24). The oil outlet end of the third control oil circuit (24) is communicated with the oil inlet end of the third injection oil circuit (C). The electric control box (4) is respectively communicated with the first control oil circuit (22), the second control oil circuit (23), and the third control oil circuit (24). Compressed air is communicated with the air inlet end of the pneumatic two-piece (12). The air outlet end of the pneumatic two-piece (12) is communicated with the air inlet end of the third solenoid valve (13). The air outlet end of the third solenoid valve (13) is communicated with the air inlet end of the pressure sensor (14). The air outlet end of the pressure sensor (14) is respectively communicated with the oil inlet ends of the first injection oil circuit (A), the second injection oil circuit (B), and the third injection oil circuit (C). The structures of the first control oil circuit (22), the second control oil circuit (23), and the third control oil circuit (24) are the same. The first control oil circuit (22) includes a first branch (221), a second branch (222), a third branch (223), a fourth branch (224), a fifth branch (225), and a sixth branch (226). The structures of the first branch (221), the second branch (222), the third branch (223), the fourth branch (224), the fifth branch (225), and the sixth branch (226) are the same. A first one-way valve (5), a pressure switch (6), and a pressure gauge (8) are sequentially arranged on the first branch (221). The oil outlet end of the multi-point lubricating pump (2) is communicated with the oil inlet end of the first one-way valve (5). The oil outlet end of the first one-way valve (5) is communicated with the oil inlet end of the pressure switch (6). The oil outlet end of the pressure switch (6) is communicated with the oil inlet end of the pressure gauge (8). The oil outlet end of the pressure gauge (8) is communicated with the oil inlet end of the first injection oil circuit (A). The first injection oil circuit (A) includes a first injection branch (91), a second injection branch (92), a third injection branch (93), a fourth injection branch (94), a fifth injection branch (95), and a sixth injection branch (96). The oil inlet end of the first injection branch (91) is communicated with the oil outlet end of the first branch (221). The oil inlet end of the second injection branch (92) is communicated with the oil outlet end of the second branch (222). The oil inlet end of the third injection branch (93) is communicated with the oil outlet end of the third branch (223). The oil inlet end of the fourth injection branch (94) is communicated with the oil outlet end of the fourth branch (224). The oil inlet end of the fifth injection branch (95) is communicated with the oil outlet end of the fifth branch (225). The oil inlet end of the sixth injection branch (96) is communicated with the oil outlet end of the sixth branch (226). A first solenoid valve (10) and a second solenoid valve (101) are arranged on the first injection branch (91). The oil inlet end of the first solenoid valve (10) is communicated with the oil outlet end of the first branch (221), and the oil inlet end of the second solenoid valve (101) is communicated with the oil outlet end of the first branch (221). The oil outlet end of the first solenoid valve (10) is communicated with the oil inlet end of the first injection valve (111), and the oil outlet end of the second solenoid valve (101) is communicated with the oil inlet end of the second injection valve (112). The usage method of the jet lubrication system of the above-mentioned gear-rack lifting system is as follows: The usage method includes a local control mode. This local control mode means that when the start button of the electric control box (4) is pressed, the third solenoid valve (13) is powered on. Compressed air passes through the pneumatic combination unit (12), the third solenoid valve (13), the pressure sensor (14), and the first control oil circuit (22) to reach the first solenoid valve (10). The first solenoid valve (10) is de-energized, and the compressed air reaches the first injection valve (111). After a few seconds, the first solenoid valve (10) is powered on, and the compressed air reaches the second injection valve (112). After the compressed air is turned on for 5 seconds, the multi-point lubrication pump (2) operates to start supplying grease. The grease passes through the overflow valve (7), the pressure gauge (8), and the first control oil circuit (22) to reach the second solenoid valve (101). The second solenoid valve (101) is de-energized, and the grease reaches the first injection valve (111). After a few seconds, the second solenoid valve (101) is powered on, and the grease reaches the second injection valve (112). Inside the first injection valve (111) and the second injection valve (112), the compressed air blows the grease and sprays it onto the surface of the lubrication point, the first gear (171). By controlling the alternate power-on and power-off of the first solenoid valve (10) and the second solenoid valve (101), the lubrication system alternately sprays grease on the upper and lower layer lubrication points.

2. The jet lubrication system of a rack and pinion lifting system according to claim 1, characterized in that: The structures of the first side pipe (161), the second side pipe (162), and the third side pipe (163) are the same, and the first side pipe (161), the second side pipe (162), and the third side pipe (163) are arranged in a triangular shape.

3. The jet lubrication system of a rack and pinion lifting system according to claim 1, characterized in that: The oil inlet end of the multi-point lubrication pump (2) is communicated with the oil outlet end of the oil storage barrel (3), and a liquid level switch and a heating belt are arranged inside the oil storage barrel (3).

4. The jet lubrication system of a rack and pinion lifting system according to claim 1, characterized in that: The pneumatic combination unit (12) includes a pressure reducing valve (121), a pressure gauge (122), and a filter (123). The oil inlet end of the pressure reducing valve (121) is communicated with the oil outlet end of the multi-point lubrication pump (2). The oil outlet end of the pressure reducing valve (121) is communicated with the oil inlet end of the pressure gauge (122). The oil outlet end of the pressure gauge (122) is communicated with the oil inlet end of the filter (123). The oil outlet end of the filter (123) is respectively communicated with the oil inlet ends of the first injection oil circuit (A), the second injection oil circuit (B), and the third injection oil circuit (C).

5. The jet lubrication system of a rack and pinion lifting system according to claim 1, characterized in that: The oil inlet ends of the first one-way valves (5) on the first branch (221), the second branch (222), the third branch (223), the fourth branch (224), the fifth branch (225), and the sixth branch (226) are all communicated with the oil outlet end of the overflow valve (7).

6. The jet lubrication system of a rack and pinion lifting system according to claim 1, characterized in that: The usage method further includes a remote control mode, which includes three modes: forced, following, and automatic; The forced mode means: it is basically the same as the local control mode, except that in the forced mode, the lubrication system is controlled at the lifting system console, and in the local control mode, the lubrication system is controlled on the local electric control box (4); The following mode means: the start and stop of the lubricating oil circuit are determined by the start and stop of the lifting mechanism (15). After the lifting mechanism (15) starts to operate, the lifting mechanism (15) outputs a start signal to the lubricating oil circuit. After the lubricating oil circuit starts, it controls the third solenoid valve (13) to be energized, and compressed air passes through the pneumatic combination unit (12), the third solenoid valve (13), the pressure sensor 14, and the first control oil circuit (22) to reach the first injection valve (111); 5 seconds after the compressed air is turned on, it controls the multi-point lubricating pump (2) to work and start supplying grease. The grease passes through the overflow valve (7), the pressure gauge (8), and the first control oil circuit (22) to reach the first injection valve (111); in the first injection valve (111) and the second injection valve (112), the compressed air blows the grease and sprays it onto the surface of the first gear (171) of the lubrication point. When the lifting mechanism (15) stops operating, the lifting mechanism (15) outputs a stop signal to the lubricating oil circuit, and the lubricating oil circuit stops operating; The automatic mode means: the start and stop of the lubricating oil circuit are determined by the start and stop of the lifting mechanism (15). Press the start button of the electric control box (4), the third solenoid valve (13) is energized, and compressed air passes through the pneumatic combination unit (12), the third solenoid valve (13), the pressure sensor (14), and the first control oil circuit (22) to reach the first injection valve (111); after the compressed air is turned on, it controls the multi-point lubricating pump (2) to work and start supplying grease. The grease passes through the overflow valve (7), the pressure gauge (8), and the first control oil circuit (22) to reach the first injection valve (111); in the first injection valve (111) and the second injection valve (112), the compressed air blows the grease and sprays it onto the surface of the first gear (171) of the lubrication point; when the operating time of the lubricating oil circuit reaches the set working time, the motor (1) stops working, the third solenoid valve (13) loses power, and the system enters a pause cycle. When the pause cycle reaches the set value, the motor (1) works again, and the system enters the next lubrication cycle, and so on.

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