Centralized lubricating system, combined lubricating device, lubricating pump and handheld oil gun

Abstract

The utility model relates to a centralized lubricating system, a combined lubricating device, a lubricating pump and a handheld oil gun. Automatic centralized lubrication and manual lubrication can be achieved, and after manual lubrication is completed, the lubricating pump is automatically switched to supplement a lubricating agent for the manual lubrication part so that the lubricating pump can be used for manual lubrication next time. An outlet of the pumping mechanism is connected with an electric control switching valve, the electric control switching valve comprises a grease inlet, a first grease outlet and a second grease outlet, the electric control switching valve can control the grease inlet to be only communicated with one of the first grease outlet and the second grease outlet, the first grease outlet is used for being connected with a grease supply pipeline of the centralized lubrication system, and the second grease outlet is connected with an oil pumping pipe connector. The lubricating pump comprises a containing base used for containing the handheld oil gun, a detection module used for detecting whether the handheld oil gun is placed in place or not is arranged on the containing base, after the handheld oil gun is placed on the containing base, the detection module feeds back a signal to the monitor, and the monitor controls the electric control switching valve to be switched to the second grease outlet to discharge grease.

Description

Technical Field

[0001] The utility model relates to a centralized lubrication system, a combined lubrication device, a lubricating pump and a hand-held oil gun. Background Art

[0002] Mechanical equipment generally has moving parts, and friction pairs are formed between the moving parts. Taking construction machinery as an example. Construction machinery is an important part of the equipment industry and is applied in multiple fields. Its operating conditions are complex, the operating objects are variable, and it often works under variable loads, with high requirements for the reliability and adaptability of the machine. In order to ensure the good operation of the friction pairs such as bearings and articulated shafts during long-term high-intensity construction operations, it is necessary to effectively lubricate the pins and bushings.

[0003] Taking construction machinery as an example, the friction pairs at the boom, dipper arm, connecting rod, drawbar and other parts need to be regularly filled with grease for lubrication. Since there are many lubrication points on the excavator and it is inconvenient for manual climbing to the filling positions, a centralized lubrication system is generally used to fill the grease. The centralized lubrication system pumps the grease by a lubricating pump, and after passing through the main oil circuit arranged on the equipment, it enters each distributor. In each distributor, according to the set displacement, the distributor passes through multiple branch oil pipes distributed on the equipment to each lubrication point. The centralized lubrication system greatly reduces the burden of manual filling, and since the lubrication can also be automatically realized during the operation of the equipment, it greatly saves the time of the machine operator, increases the operation time of the equipment, and improves the work efficiency.

[0004] However, the centralized lubrication system also has deficiencies that need to be solved urgently, that is, due to the harsh operating environment of construction machinery, it is often affected by high temperature, low temperature, wind, frost, rain and snow erosion. More importantly, the operating mechanism of construction machinery often comes into contact with materials such as ores, and is easily knocked, resulting in situations such as oil pipe rupture, distributor damage, blockage, etc., causing the overall failure of the centralized lubrication system and unable to continue lubricating. Once the centralized lubrication system is damaged, the machine operator has to stop working and needs to travel a long distance to purchase temporary lubrication equipment and grease or wait for the maintenance personnel to come and repair, which greatly affects the construction process. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a centralized lubrication system that can perform automatic centralized lubrication under normal circumstances. When the system fails or some special points need to be filled with lubricant, manual lubrication can be conveniently carried out. After the manual lubrication is completed, the centralized lubrication work can automatically replenish the lubricant for the manual lubrication part for the next manual lubrication use; the purpose of the utility model is also to provide a combined lubrication device, a lubricating pump and a hand-held oil gun used in the above centralized lubrication system.

[0006] The technical solution of the combined lubrication device of the utility model is as follows:

[0007] The combined lubrication device includes:

[0008] A lubrication pump, which includes an oil tank, a monitor, and a pumping mechanism. The pumping mechanism can suck lubricant from the oil tank and pump it out. An electrically controlled switching valve is connected to the outlet of the pumping mechanism. The electrically controlled switching valve includes a grease inlet and first and second grease outlets. The electrically controlled switching valve can control the grease inlet to be only communicated with one of the first and second grease outlets. The first grease outlet is used to connect to the grease supply pipeline of the centralized lubrication system, and the second grease outlet is connected to a pump oil pipe joint. A pressure reducing and overflow module is arranged between the second grease outlet and the pump oil pipe joint, and the pressure reducing and overflow module is communicated with the oil tank to perform pressure reducing and overflow when the pressure exceeds the set value.

[0009] A handheld grease gun, which includes a grease storage pipe, and the inlet of the grease storage pipe is connected to a gun oil pipe joint; the pump oil pipe joint and the gun oil pipe joint can be quickly connected and disassembled.

[0010] The lubrication pump includes a placement seat for placing the handheld grease gun. A detection module for detecting whether the handheld grease gun is placed in place is arranged on the placement seat. After the handheld grease gun is placed on the placement seat, the detection module feeds back a signal to the monitor, and the monitor controls the electrically controlled switching valve to switch to the second grease outlet for discharging grease.

[0011] The beneficial effects of this solution are as follows: During use, under normal circumstances, the lubrication pump defaults to pumping grease to the distributor through the first grease outlet, and then the grease is distributed to each lubrication point through the distributor to achieve centralized lubrication. When the handheld grease gun is placed on the placement seat, the detection module can detect that the handheld grease gun is placed in place, feed back to the monitor, and control the electrically controlled switching valve to switch to the second grease outlet for discharging grease. The grease can then be filled into the handheld grease gun after passing through the pump oil pipe joint until it is full and then automatically overflows back to the oil tank. When the handheld grease gun needs to be used, directly remove the handheld grease gun and add grease to the lubrication points that need to be manually lubricated. There is no need to purchase grease separately or purchase a temporary grease filling device separately. After use, directly place the handheld grease gun back in place and dock the gun oil pipe joint with the pump oil pipe joint, and the lubrication pump can be relied on to replenish the grease again. In summary, it has the following advantages:

[0012] 1. There is no need to purchase grease separately, and it can be directly filled by relying on the lubrication pump, avoiding the trouble of purchasing grease;

[0013] 2. The grease gun does not need to be filled with grease by itself, reducing the waiting time, and the lubrication pump automatically replenishes the grease for the grease gun during the idle time of the grease gun;

[0014] 3. It can not only perform centralized lubrication, but also perform temporary emergency manual lubrication in case of failure, and can also manually add grease to some points that cannot be automatically centrally lubricated;

[0015] 4. It is very convenient to use. It can be picked up and used when needed, and it is in an automatic replenishment state when not in use.

[0016] Furthermore, a piston is provided in the grease storage tube, and a push rod that can extend out of the grease storage tube is connected to the piston, and the push rod is arranged downward. When the grease storage tube is full of grease, the piston drives the push rod to extend and push the placement seat, so that the hand-held refueling gun is separated from the detection area of ​​the detection module. The detection module feeds back to the monitor, and the monitor controls the electronically controlled switching valve to discharge grease from the first grease outlet. The setting of the grease storage tube and the push rod is equivalent to setting a high liquid level detection module and a high liquid level closing execution module when the grease storage tube is full, so that the grease storage tube can be automatically separated from the set position of the placement seat after being full, so that the detection module cannot detect the grease storage tube, and then the electronically controlled switching valve can be controlled by the monitor to automatically close the grease filling oil circuit and switch back to centralized lubrication.

[0017] Furthermore, a magnet is provided at the bottom of the fat storage tube, and the detection module is a magnetic induction sensor. Through the cooperation of the magnetic induction sensor and the magnet, non-contact detection can be performed, which is not easily blocked or disturbed by the environment and is more stable and reliable.

[0018] Furthermore, the electrically controlled switching valve is a two-position three-way solenoid valve.

[0019] Furthermore, the pressure relief module is a relief valve or a safety valve or a pressure reducing valve. Since the pressure pumped out by the lubrication pump is generally high, and the bearing capacity of the grease storage tube of the handheld refueling gun is very limited, in order to prevent the high-pressure grease from filling into the grease storage tube and causing the tube to burst, a safety valve, a pressure regulating valve or a pressure reducing valve can be set to reduce the outlet pressure and ensure the safety of the grease storage tube.

[0020] Furthermore, the detection sensor includes at least one of a pressure sensor, a mechanical limit switch, a laser beam sensor, and an infrared sensor.

[0021] Furthermore, a one-way valve is provided on the pump oil pipe joint. When the gun oil pipe joint is connected to the pump oil pipe joint, the one-way valve is turned on. When the gun oil pipe joint is disconnected from the pump oil pipe joint, the one-way valve is closed to prevent the grease from flowing out of the pump oil pipe joint. Since the grease is relatively viscous even after the lubrication pump is shut down, it takes time to relieve the pressure. If the gun oil pipe joint is directly disconnected from the pump oil pipe joint, the grease in the pump oil pipe joint and the oil pipe in front of it will still be under pressure, causing the grease to flow out of the pump oil pipe joint, polluting the environment and wasting the grease. The one-way valve can avoid this problem by opening the channel when filling the grease and immediately closing the channel when the joint is disconnected.

[0022] Furthermore, the lubrication pump includes a power module for powering the lubrication pump, the power module is connected to a pump electrical connector via wires, the handheld refueling gun is an electric refueling gun, includes a rechargeable battery, the charging port of the rechargeable battery is connected to a gun electrical connector for charging the rechargeable battery of the handheld refueling gun, and the gun electrical connector and the pump electrical connector can be quickly connected and disassembled.

[0023] The technical solution of the lubricating pump of the present utility model is as follows:

[0024] The lubricating pump includes an oil tank, a monitor and a pumping mechanism. The pumping mechanism can suck the lubricant from the oil tank and pump it out. An electrically controlled switching valve is connected to the outlet of the pumping mechanism. The electrically controlled switching valve includes a grease inlet and first and second grease outlets. The electrically controlled switching valve can control the grease inlet to be only communicated with one of the first and second grease outlets. The first grease outlet is used to connect to the grease supply pipeline of the centralized lubrication system, and the second grease outlet is connected with a pump oil pipe joint. A pressure reducing and overflow module is arranged between the second grease outlet and the pump oil pipe joint. The pressure reducing and overflow module is communicated with the oil tank so as to perform pressure reducing and overflow when the pressure exceeds the set value. The lubricating pump includes a placement seat for placing a hand-held grease gun. A detection module for detecting whether the hand-held grease gun is placed in place is arranged on the placement seat. After the hand-held grease gun is placed on the placement seat, the detection module feeds back a signal to the monitor, and the monitor controls the electrically controlled switching valve to switch to the second grease outlet for grease output.

[0025] The beneficial effects of this solution are as follows: During use, under normal circumstances, the lubricating pump defaults to pumping grease to the distributor through the first grease outlet, and then the distributor distributes it to each lubrication point to achieve centralized lubrication. When the hand-held grease gun is placed on the placement seat, the detection module can detect that the hand-held grease gun is placed in place, feed it back to the monitor, and control the electrically controlled switching valve to switch to the second grease outlet for grease output. The grease can then be used to fill the hand-held grease gun through the pump oil pipe joint until it is full and then automatically overflows back to the oil tank. When the hand-held grease gun needs to be used, directly remove the hand-held grease gun and add grease to the lubrication points that need manual lubrication. There is no need to purchase grease separately or purchase a temporary grease filling device separately. After use, directly place the hand-held grease gun back in place and dock the gun oil pipe joint with the pump oil pipe joint, and the lubricating pump can be relied on to replenish the grease again. In summary, it has the following advantages:

[0026] 1. There is no need to purchase grease separately, and it can be directly filled by relying on the lubricating pump, avoiding the trouble of purchasing grease;

[0027] 2. There is no need to fill the grease gun manually, reducing the waiting time, and the lubricating pump automatically replenishes the grease for the grease gun during the idle time of the grease gun;

[0028] 3. It can not only perform centralized lubrication, but also perform temporary emergency manual lubrication in case of failure, and can also manually add grease to some points that cannot be automatically centrally lubricated;

[0029] 4. It is very convenient to use. It can be picked up and used when needed, and it is in an automatic replenishment state when not in use.

[0030] Furthermore, the electrically controlled switching valve is a two-position three-way solenoid valve.

[0031] Furthermore, the pressure relief module is a relief valve or a safety valve or a pressure reducing valve. Since the pressure pumped out by the lubrication pump is generally high, and the bearing capacity of the grease storage tube of the handheld refueling gun is very limited, in order to prevent the high-pressure grease from filling into the grease storage tube and causing the tube to burst, a safety valve, a pressure regulating valve or a pressure reducing valve can be set to reduce the outlet pressure and ensure the safety of the grease storage tube.

[0032] Furthermore, the detection sensor includes at least one of a pressure sensor, a mechanical limit switch, a laser beam sensor, and an infrared sensor.

[0033] Furthermore, a one-way valve is provided on the pump oil pipe joint. When the gun oil pipe joint is connected to the pump oil pipe joint, the one-way valve is turned on. When the gun oil pipe joint is disconnected from the pump oil pipe joint, the one-way valve is closed to prevent the grease from flowing out of the pump oil pipe joint. Since the grease is relatively viscous even after the lubrication pump is shut down, it takes time to relieve the pressure. If the gun oil pipe joint is directly disconnected from the pump oil pipe joint, the grease in the pump oil pipe joint and the oil pipe in front of it will still be under pressure, causing the grease to flow out of the pump oil pipe joint, polluting the environment and wasting the grease. The one-way valve can avoid this problem by opening the channel when filling the grease and immediately closing the channel when the joint is disconnected.

[0034] Furthermore, the lubrication pump includes a power module for powering the lubrication pump, the power module is connected to a pump electrical connector via wires, the handheld refueling gun is an electric refueling gun, includes a rechargeable battery, the charging port of the rechargeable battery is connected to a gun electrical connector for charging the rechargeable battery of the handheld refueling gun, and the gun electrical connector and the pump electrical connector can be quickly connected and disassembled.

[0035] The technical solution of the handheld refueling gun of the utility model is as follows:

[0036] The handheld fuel gun includes:

[0037] A grease storage pipe, used for storing lubricant, including an inlet and an outlet;

[0038] The gun oil pipe joint is communicated with the inlet of the grease storage pipe and is used for quickly docking with the pump oil pipe joint of the lubrication pump to receive the lubricant from the lubrication pump.

[0039] The beneficial effects of this solution are as follows: It can be used in combination with a lubricating pump and has an interface for docking with the lubricating pump. Under normal circumstances, the electric control switching valve of the lubricating pump supplies grease to the distributor through the first grease outlet for centralized lubrication. When the hand-held grease gun is placed on the placement seat, the electric control switching valve switches to supply grease through the second grease outlet to fill the hand-held grease gun until it is full and then automatically overflows back to the fuel tank. When the hand-held grease gun is needed, simply remove the hand-held grease gun and apply grease to the lubrication points that require manual lubrication. There is no need to purchase additional grease or temporary grease filling equipment separately. After use, directly place the hand-held grease gun back in place and dock the gun oil pipe connector with the pump oil pipe connector, and it can rely on the normal lubrication of the lubricating pump while replenishing grease for it. In summary, it has the following advantages:

[0040] 1. There is no need to purchase additional grease separately, and it can be directly filled by relying on the lubricating pump, avoiding the trouble of buying grease;

[0041] 2. The grease gun does not need to be filled with grease by itself, reducing the waiting time, and the lubricating pump automatically replenishes grease for the grease gun during its idle time;

[0042] 3. It can not only perform centralized lubrication, but also provide temporary emergency manual lubrication in case of failure, and can also manually apply grease to some points that cannot be automatically lubricated centrally;

[0043] 4. It is very convenient to use. It can be picked up and used when needed, and it is in an automatic replenishment state when not in use.

[0044] Furthermore, a piston is provided in the grease storage tube, and a push rod that can extend out of the grease storage tube is connected to the piston. The push rod is arranged downward. When the grease storage tube is full of grease, the piston drives the push rod to extend and can push the placement seat, so that the hand-held grease gun is separated from the detection area of the detection module of the lubricating pump. Through the setting of the grease storage tube and the push rod, it is equivalent to setting a high liquid level detection module and a high liquid level closing execution module when the grease storage tube is full, so that the grease storage tube can be automatically separated from the set position of the placement seat after being full, so that the detection module cannot detect the grease storage tube, and then the electric control switching valve can be controlled by the monitor to automatically close the grease filling oil circuit and switch back to centralized lubrication.

[0045] Furthermore, a magnet is provided at the lower part of the grease storage tube.

[0046] Furthermore, the hand-held grease gun is an electric grease gun, including a rechargeable battery. The charging port of the rechargeable battery is connected with a gun electric connector, and is used to charge the rechargeable battery of the hand-held grease gun by docking with the pump electric connector of the lubricating pump.

[0047] The technical solution of the centralized lubrication system of the present utility model is as follows:

[0048] The centralized lubrication system includes a lubricating pump, a hand-held grease gun and a distributor;

[0049] Lubrication pump, comprising an oil tank, a monitor and a pumping mechanism. The pumping mechanism can suck lubricant from the oil tank and pump it out. The outlet of the pumping mechanism is connected with an electronically controlled switching valve. The electronically controlled switching valve includes a grease inlet and first and second grease outlets. The electronically controlled switching valve can control the grease inlet to be only communicated with one of the first and second grease outlets. The first grease outlet is connected with a distributor, and the second grease outlet is connected with a pump oil pipe joint. A pressure reducing and overflow module is arranged between the second grease outlet and the pump oil pipe joint. The pressure reducing and overflow module is communicated with the oil tank to perform pressure reducing and overflow when the pressure exceeds the set value.

[0050] Handheld grease gun, comprising a grease storage pipe, and the inlet of the grease storage pipe is connected with a gun oil pipe joint. The pump oil pipe joint and the gun oil pipe joint can be quickly connected and disassembled.

[0051] The lubrication pump includes a placement seat for placing the handheld grease gun. A detection module for detecting whether the handheld grease gun is placed in place is arranged on the placement seat. After the handheld grease gun is placed on the placement seat, the detection module feeds back a signal to the monitor, and the monitor controls the electronically controlled switching valve to switch to the second grease outlet for discharging grease.

[0052] The beneficial effects of this solution are as follows: During use, under normal circumstances, the lubrication pump defaults to pumping grease from the first grease outlet to the distributor, and then the distributor distributes it to each lubrication point to achieve centralized lubrication. When the handheld grease gun is placed on the placement seat, the detection module can detect that the handheld grease gun is placed in place, feed back to the monitor, and control the electronically controlled switching valve to switch to the second grease outlet for discharging grease. The grease can then pass through the pump oil pipe joint to fill the handheld grease gun until it is full and then automatically overflows back to the oil tank. When the handheld grease gun needs to be used, directly remove the handheld grease gun and apply grease to the lubrication points that need manual lubrication. There is no need to purchase grease separately or purchase temporary grease filling equipment separately. After use, directly place the handheld grease gun back in place and dock the gun oil pipe joint with the pump oil pipe joint, and the lubrication pump can be relied on to replenish grease again. In summary, it has the following advantages:

[0053] 5. There is no need to purchase grease separately and directly rely on the lubrication pump for filling, avoiding the trouble of purchasing grease.

[0054] 6. The grease gun does not need to be filled with grease by itself, reducing the waiting time, and the lubrication pump automatically replenishes grease for the grease gun during the idle time of the grease gun.

[0055] 7. It can not only achieve centralized lubrication, but also perform temporary emergency manual lubrication in case of failure, and can also manually apply grease to some points that cannot be automatically lubricated centrally.

[0056] 8. It is very convenient to use. You can pick it up and use it when needed, and it is in an automatic replenishment state when not in use.

[0057] Furthermore, a piston is provided in the grease storage tube, and a push rod that can extend out of the grease storage tube is connected to the piston, and the push rod is arranged downward. When the grease storage tube is full of grease, the piston drives the push rod to extend and push the placement seat, so that the hand-held refueling gun is separated from the detection area of ​​the detection module. The detection module feeds back to the monitor, and the monitor controls the electronically controlled switching valve to discharge grease from the first grease outlet. The setting of the grease storage tube and the push rod is equivalent to setting a high liquid level detection module and a high liquid level closing execution module when the grease storage tube is full, so that the grease storage tube can be automatically separated from the set position of the placement seat after being full, so that the detection module cannot detect the grease storage tube, and then the electronically controlled switching valve can be controlled by the monitor to automatically close the grease filling oil circuit and switch back to centralized lubrication.

[0058] Furthermore, a magnet is provided at the bottom of the fat storage tube, and the detection module is a magnetic induction sensor. Through the cooperation of the magnetic induction sensor and the magnet, non-contact detection can be performed, which is not easily blocked or disturbed by the environment and is more stable and reliable.

[0059] Furthermore, the electrically controlled switching valve is a two-position three-way solenoid valve.

[0060] Furthermore, the pressure relief module is a relief valve or a safety valve or a pressure reducing valve. Since the pressure pumped out by the lubrication pump is generally high, and the bearing capacity of the grease storage tube of the handheld refueling gun is very limited, in order to prevent the high-pressure grease from filling into the grease storage tube and causing the tube to burst, a safety valve, a pressure regulating valve or a pressure reducing valve can be set to reduce the outlet pressure and ensure the safety of the grease storage tube.

[0061] Furthermore, the detection sensor includes at least one of a pressure sensor, a mechanical limit switch, a laser beam sensor, and an infrared sensor.

[0062] Furthermore, a one-way valve is provided on the pump oil pipe joint. When the gun oil pipe joint is connected to the pump oil pipe joint, the one-way valve is turned on. When the gun oil pipe joint is disconnected from the pump oil pipe joint, the one-way valve is closed to prevent the grease from flowing out of the pump oil pipe joint. Since the grease is relatively viscous even after the lubrication pump is shut down, it takes time to relieve the pressure. If the gun oil pipe joint is directly disconnected from the pump oil pipe joint, the grease in the pump oil pipe joint and the oil pipe in front of it will still be under pressure, causing the grease to flow out of the pump oil pipe joint, polluting the environment and wasting the grease. The one-way valve can avoid this problem by opening the channel when filling the grease and immediately closing the channel when the joint is disconnected.

[0063] Furthermore, the lubrication pump includes a power module for powering the lubrication pump, the power module is connected to a pump electrical connector via wires, the handheld refueling gun is an electric refueling gun, includes a rechargeable battery, the charging port of the rechargeable battery is connected to a gun electrical connector for charging the rechargeable battery of the handheld refueling gun, and the gun electrical connector and the pump electrical connector can be quickly connected and disassembled.

[0064] Further, the dispenser is a two-line dispenser, and a two-position four-way solenoid valve is arranged in front of the two-line dispenser. The two-position four-way solenoid valve includes two internal oil ports and two external oil ports. One of the two internal oil ports is communicated with the fuel tank, and the other is connected to the first grease outlet. The two external oil ports are respectively connected to the two inlets of the two-line dispenser.

[0065] Further, the dispenser is a progressive dispenser, and there are multiple progressive dispensers. The centralized lubrication system includes a two-position four-way solenoid valve. The two-position four-way solenoid valve includes two internal oil ports and two external oil ports. One of the two internal oil ports is communicated with the fuel tank, and the other is connected to the first grease outlet. Each of the two external oil ports is respectively connected to the inlet of a progressive dispenser.

[0066] Further, the dispenser is a single-line dispenser, and a two-position three-way solenoid valve is arranged in front of the single-line dispenser. The two-position three-way solenoid valve includes two internal oil ports and one external oil port. One of the two internal oil ports is communicated with the fuel tank, and the other is connected to the first grease outlet. The one external oil port is connected to the inlet of the single-line dispenser. Description of the Drawings

[0067] Figure 1 is the schematic diagram of the system principle of Embodiment 1 of the centralized lubrication system of the present utility model;

[0068] Figure 2 is Figure 1 the schematic diagram of the cooperation structure of the placement rack and the grease storage pipe in;

[0069] Figure 3 is the schematic diagram of the system principle of Embodiment 2 of the centralized lubrication system;

[0070] Figure 4 is the schematic diagram of the system principle of Embodiment 3 of the centralized lubrication system;

[0071] Figure 5 is the schematic diagram of the system principle of Embodiment 4 of the centralized lubrication system;

[0072] In the figure: 1 - hand-held grease gun, 11 - grease storage pipe, 111 - piston, 112 - ejector rod, 12 - gun oil pipe joint, 13 - gun electrical connector, 14 - rechargeable battery, 15 - gun motor, 16 - gun drive mechanism, 17 - gun head, 18 - annular permanent magnet, 2 - lubrication pump, 21 - fuel tank, 22 - pump motor, 23 - plunger pair, 24 - electronically controlled switching valve, 25 - monitor, 26 - overflow valve, 27 - oil pressure switch, 281 - two-position four-way valve, 282 - two-position three-way valve, 29 - power module, 210 - pump oil pipe joint, 211 - pump electrical connector, 212 - placement seat, 213 - magnetic induction sensor, 31 - progressive dispenser, 32 - two-line dispenser, 33 - single-line dispenser, 4 - main oil circuit, 5 - pressure reducing valve. Detailed implementation manners

[0073] In order to make the purpose, technical solutions and advantages of the present utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments.

[0074] Embodiment 1 of the centralized lubrication system of the present utility model: As Figure 1 shown, this centralized lubrication system is a two-line centralized lubrication system. The system mainly includes a lubricating pump 2, a hand-held oil gun 1, a two-line distributor 32, a progressive distributor 31, and oil pipe and wire connectors, etc. The centralized lubrication system can be arranged on the equipment to be lubricated, such as an excavator.

[0075] The lubricating pump 2 includes an oil tank 21 and a pump head assembly. The pump head assembly includes a pump housing and a pump motor 22, a transmission mechanism, one or at least two combinable plunger pairs 23 mounted on the pump housing, an oil pressure switch 27 arranged on the oil path behind the plunger pair 23, a two-position four-way valve 281, a monitor 25, a power supply module 29, an electronically controlled switching valve 24 arranged between the outlet of the plunger pair 23 and the P port of the two-position four-way valve 281. One outlet of the electronically controlled switching valve 24 is connected to the P port of the two-position four-way valve 281, and the other outlet is connected to an oil path. A pressure reducing valve 5 and a relief valve 26, as well as a pump oil pipe joint 210 and a pump electrical connector 211 led out and connected to the power supply module 29 are arranged on the oil path. Specifically, the lubricating pump 2 includes an oil tank 21, a monitor 25, and a pumping mechanism (motor, transmission mechanism, and plunger pair 23). The pumping mechanism can suck the lubricant from the oil tank 21 and pump it out. An electronically controlled switching valve 24 is connected to the outlet of the pumping mechanism. The electronically controlled switching valve 24 includes a grease inlet and first and second grease outlets. The electronically controlled switching valve 24 can control the grease inlet to be only communicated with one of the first and second grease outlets. The first grease outlet is used to connect to the grease supply pipeline of the centralized lubrication system, and the second grease outlet is connected to a pump oil pipe joint 210. A pressure reducing and overflow module is arranged between the second grease outlet and the pump oil pipe joint 210. The pressure reducing and overflow module is communicated with the oil tank 21 so as to perform pressure reducing and overflow when the pressure exceeds the set value.

[0076] The handheld grease gun 1 is an electric grease gun, which includes a grease storage tube 11, a gun motor 15, a gun drive mechanism 16, a gun head 17, a rechargeable battery 14, a gun electrical connector 13 connected to the rechargeable battery 14 by a wire, and a gun oil pipe joint 12 connected to the oil inlet of the grease storage tube 11 through an oil pipe. In other embodiments, the handheld grease gun 1 is an electric grease gun without a battery, which is directly powered by plugging a wire and a plug into a power source. That is, a wire is connected to the handheld grease gun 1, and a plug is provided at the outer end of the wire. When the handheld grease gun 1 is at the factory or other places with a power socket, it can be directly inserted into the socket for power supply. Alternatively, the handheld grease gun 1 is a manually driven grease gun, without a rechargeable battery 14, a gun motor 15, a gun drive mechanism 16, and a gun electrical connector 13, and there is no need to set a pump electrical connector 211 on the corresponding lubricating pump 2 to charge it. The lubricating pump 2 includes a power module 29 for supplying power to the lubricating pump 2. The power module 29 is connected to a pump electrical connector 211 through a wire. The handheld grease gun 1 is an electric grease gun, including a rechargeable battery 14. The charging port of the rechargeable battery 14 is connected to a gun electrical connector 13 for charging the rechargeable battery 14 of the handheld grease gun 1. The gun electrical connector 13 and the pump electrical connector 211 can be quickly connected and disassembled.

[0077] In this embodiment, a placement seat 212 is provided on the lubricating pump 2 for placing the handheld grease gun 1. The placement seat 212 is provided with a structure for positioning the handheld grease gun 1. An annular permanent magnet 18 is provided at the position where the handheld grease gun 1 is placed on the positioning structure. A magnetic induction sensor 213 (detection module), such as a reed switch, is correspondingly provided on the placement seat 212. When the handheld grease gun 1 is placed in place, the reed switch can detect it and feedback it to the monitor 25. The monitor 25 can then control the electric control switching valve 24 to switch to the second grease outlet for greasing, so as to fill the handheld grease gun 1 with grease.

[0078] In this embodiment, a piston 111 is slidably and sealingly assembled in the grease storage pipe 11. A push rod 112 that can extend out of the grease storage pipe 11 is connected to the piston 111. The push rod 112 is arranged downward. When the rodless cavity of the grease storage pipe 11 is filled with grease, the piston 111 drives the push rod 112 to extend and push the placement seat 212, so that the hand-held grease gun 1 is separated from the detection area of the reed switch. The detection module feeds back to the monitor 25, and the monitor 25 controls the electric control switching valve 24 to discharge grease from the first grease outlet, and continues centralized lubrication. Through the settings of the grease storage pipe 11 and the push rod 112, it is equivalent to setting a high liquid level detection module and a high liquid level closing execution module when the grease storage pipe 11 is full, so that after being full, the grease storage pipe 11 can automatically be separated from the set position of the placement seat 212, so that the detection module cannot detect the grease storage pipe 11. Furthermore, the electric control switching valve 24 can be controlled by the monitor 25 to automatically close the grease filling oil circuit and switch back to centralized lubrication. The electric control switching valve 24 in this embodiment is a two-position three-way solenoid valve. The pressure reducing and overflow module is an overflow valve 26 or a safety valve or a pressure reducing valve 5. Since the pressure pumped out by the lubricating pump 2 is generally relatively large, and the load-bearing capacity of the grease storage pipe 11 of the hand-held grease gun 1 is very limited. In order to prevent the high-pressure grease from being filled into the grease storage pipe 11 and causing the pipe to burst, after setting the safety valve, pressure regulating valve or pressure reducing valve 5, the outlet pressure can be reduced to ensure the safety of the grease storage pipe 11.

[0079] A check valve is provided on the pump oil pipe joint 210. When the gun oil pipe joint 12 is connected to the pump oil pipe joint 210, the check valve is turned on. When the gun oil pipe joint 12 is separated from the pump oil pipe joint 210, the check valve is closed to prevent the grease from flowing out of the pump oil pipe joint 210. Since even after the lubricating pump 2 stops, due to the high viscosity of the grease, it takes time to relieve the pressure. If the gun oil pipe joint 12 is directly disconnected from the pump oil pipe joint 210, the grease in the pump oil pipe joint 210 and the oil pipe in front of it still has pressure and the grease will flow out of the pump oil pipe joint 210, which will pollute the environment and waste grease. Setting the check valve can avoid this problem, opening the channel during grease filling and immediately closing the channel when disconnecting the joints.

[0080] In this embodiment, the electric control switching valve is a two-position three-way solenoid valve, and it can also be replaced by other valves that can achieve one-to-two switching.

[0081] In use, under normal circumstances, the lubricating pump 2 defaults to pumping grease to the distributor or lubricating pipeline through the first grease outlet, and then the grease is distributed to each lubricating point by the distributor to achieve centralized lubrication. When the hand-held grease gun 1 is placed on the placement seat 212, the docking of the gun and pump oil pipe joints and the connection of the gun and pump electrical connectors can be achieved manually or automatically. The detection module (reed switch) can detect that the hand-held grease gun 1 is placed in place (the magnet is sensed by the reed switch), and feedback to the monitor 25 to control the electro-hydraulic switching valve 24 to switch to the second grease outlet for grease output. The grease can then pass through the pump oil pipe joint 210 to fill the hand-held grease gun 1 until it is full and then automatically overflows back to the fuel tank 21. At the same time when it is full, the piston 111 in the grease storage tube 11 moves to the end, causing the ejector rod 112 to extend to the longest distance. The ejector rod 112 pushes the placement seat 212, causing the hand-held grease gun 1 to lift, and the magnet on the hand-held grease gun 1 to move out of the sensing range of the reed switch, and feedback to the monitor 25. The monitor 25 can then control the electro-hydraulic switching valve 24 to automatically switch to the first grease outlet for grease output; when the hand-held grease gun 1 needs to be used, directly remove the hand-held grease gun 1 and add grease to the lubricating points that need manual lubrication. There is no need to purchase additional grease or additional temporary grease filling equipment. After use, directly place the hand-held grease gun 1 back in place and dock the gun oil pipe joint 12 with the pump oil pipe joint 210, and the lubricating pump 2 can be relied on to replenish the grease again.

[0082] In this embodiment, the pump oil pipe joint 210 and the gun oil pipe joint 12 are quick oil pipe joints, which are plug-and-play and convenient to disassemble and assemble. The pump electrical connector 211 and the gun electrical connector 13 are quick electrical connectors, also plug-and-play and convenient to disassemble and assemble.

[0083] When the centralized lubrication system is working, relying on the forward and reverse rotation of the pump motor 22, the two-position four-way valve 281 is controlled to switch different valve positions to achieve the alternating grease output of the main oil circuits 4A and B. After the grease passes through the double-line distributor 32 and the progressive distributor 31 for distribution, it reaches each friction pair through the lubricating branch pipeline.

[0084] Embodiment 2 of the centralized lubrication system of the present utility model: As Figure 3 shown, this system is a single-line centralized lubrication system. The difference from Embodiment 1 is that a two-position three-way valve 282 is provided in its lubricating pump 2, there is only one main oil circuit 4, and a plurality of single-line distributors 33 are connected to the main oil circuit 4. When the single-line system is working, it needs to unload after working once and then rest.

[0085] Embodiment 3 of the centralized lubrication system of the present utility model: As Figure 4As shown, the difference from Embodiment 1 is that there is only one main oil passage 4 in this system, and the two-position four-way valve 281 is not provided in the lubricating pump 2. A master progressive distributor 31 is provided on this main oil passage 4, and a slave progressive distributor 31 is connected to the oil outlet of the master progressive distributor 31 through a pipeline. When the lubricating pump 2 is started during operation, grease will be discharged from this main oil passage 44 and the corresponding distributors, and no grease will be discharged after the lubricating pump 2 stops.

[0086] Embodiment 4 of the centralized lubrication system of the present utility model: As Figure 5 shown, this centralized lubrication system is a double-line progressive system with a double-line pump and two sets of progressive distributors 31. The system includes a lubricating pump 2, a hand-held grease gun 1, and multiple progressive distributors 31. The difference from Embodiment 1 is that each of the two main oil passages 4 is provided with a master progressive distributor 31 and a slave progressive distributor 31 connected to the oil outlet of the master progressive distributor 31. When the two main oil passages 4 discharge oil alternately, the corresponding progressive distributors 31 on the two main oil passages 44 will discharge oil alternately.

[0087] Embodiment of the hand-held grease gun of the present utility model: It has the same structure as the hand-held grease guns in the above-mentioned centralized lubrication system, and will not be elaborated herein.

[0088] Embodiment of the combined lubrication device of the present utility model: The combined lubrication device includes a lubricating pump and a hand-held grease gun. The structures of the lubricating pump and the hand-held grease gun are the same as those of the corresponding components in the above-mentioned centralized lubrication system, and will not be elaborated herein.

[0089] Embodiment of the lubricating pump of the present utility model: The structure of the lubricating pump is the same as that of the corresponding lubricating pump in the above-mentioned centralized lubrication system, and will not be elaborated herein.

[0090] The above is only the preferred embodiment of the present utility model, and it is not intended to limit the present utility model. The patent protection scope of the present utility model is subject to the claims. Any equivalent structural changes made by using the description and drawings of the present utility model should be included in the protection scope of the present utility model by the same token.

Claims

1. Combined lubrication device, characterized in that Comprising: A lubricating pump, including an oil tank, a monitor, and a pumping mechanism. The pumping mechanism can suck lubricant from the oil tank and pump it out. An electrically controlled switching valve is connected to the outlet of the pumping mechanism. The electrically controlled switching valve includes a grease inlet and first and second grease outlets. The electrically controlled switching valve can control the grease inlet to be in communication with only one of the first and second grease outlets. The first grease outlet is used to connect to the grease supply pipeline of the centralized lubrication system, and the second grease outlet is connected to a pump oil pipe joint. A pressure reducing and overflow module is provided between the second grease outlet and the pump oil pipe joint. The pressure reducing and overflow module is in communication with the oil tank to perform pressure reducing and overflow when the pressure exceeds the set value. A hand-held oil filling gun, including a grease storage pipe. The inlet of the grease storage pipe is connected to an oil pipe joint of the gun. The pump oil pipe joint and the oil pipe joint of the gun can be quickly connected and disassembled. The lubricating pump includes a placement seat for placing the hand-held oil filling gun. A detection module for detecting whether the hand-held oil filling gun is placed in place is provided on the placement seat. After the hand-held oil filling gun is placed on the placement seat, the detection module feeds back a signal to the monitor, and the monitor controls the electrically controlled switching valve to switch to the second grease outlet for grease output.

2. The combined lubrication device according to claim 1, characterized in that A piston is provided in the grease storage pipe. A push rod that can extend out of the grease storage pipe is connected to the piston. The push rod is arranged downward. When the grease storage pipe is filled with grease, the piston drives the push rod to extend and push the placement seat, so that the hand-held oil filling gun is separated from the detection area of the detection module. The detection module feeds back to the monitor, and the monitor controls the electrically controlled switching valve to output grease from the first grease outlet.

3. The combined lubrication device according to claim 1 or 2, characterized in that, A magnet is provided at the lower part of the grease storage pipe, and the detection module is a magnetic induction sensor.

4. The combined lubrication device according to claim 1 or 2, characterized in that The electrically controlled switching valve is a two-position three-way solenoid valve.

5. The combined lubrication device according to claim 1 or 2, characterized in that The pressure reducing and overflow module is an overflow valve or a safety valve or a pressure reducing valve.

6. The combined lubrication device according to claim 1, characterized in that The detection module includes at least one of a pressure sensor, a mechanical limit switch, a laser pair sensor, and an infrared sensor.

7. The combined lubrication device according to claim 1, characterized in that, A check valve is provided on the pump oil pipe joint. The check valve is opened when the oil pipe joint of the gun is connected to the pump oil pipe joint, and the check valve is closed when the oil pipe joint of the gun is separated from the pump oil pipe joint to prevent the lubricating grease from flowing out of the pump oil pipe joint.

8. The combined lubrication device according to claim 1, characterized in that, The lubricating pump includes a power supply module for supplying power to the lubricating pump. The power supply module is connected to a pump electrical connector through an electric wire. The hand-held oil filling gun is an electric oil filling gun, including a rechargeable battery. The charging port of the rechargeable battery is connected to a gun electrical connector for charging the rechargeable battery of the hand-held oil filling gun. The gun electrical connector and the pump electrical connector can be quickly connected and disassembled.

9. Lubricating pump, characterized in that, It includes an oil tank, a monitor and a pumping mechanism, which can draw lubricant from the oil tank and pump it out; the outlet of the pumping mechanism is connected to an electrically controlled switching valve, which includes a grease inlet and a first grease outlet and a second grease outlet, and the electrically controlled switching valve can control the grease inlet to be connected to only one of the first and second grease outlets, the first grease outlet is used to connect to the grease supply pipeline of the centralized lubrication system, the second grease outlet is connected to a pump oil pipe joint, a pressure reducing overflow module is arranged between the second grease outlet and the pump oil pipe joint, and the pressure reducing overflow module is connected to the oil tank so as to perform pressure reducing overflow when the pressure exceeds the set value; the lubrication pump includes a placement seat for placing a hand-held refueling gun, and a detection module for detecting whether the hand-held refueling gun is placed in place is arranged on the placement seat, and when the hand-held refueling gun is placed on the placement seat, the detection module feeds back a signal to the monitor, and the monitor controls the electrically controlled switching valve to switch to the second grease outlet to discharge grease.

10. The lubricating pump according to claim 9, characterized in that, The electrically controlled switching valve is a two-position three-way solenoid valve.

11. The lubricating pump according to claim 9, characterized in that, The pressure reducing and overflowing module is a overflow valve, a safety valve or a pressure reducing valve.

12. The lubricating pump according to claim 9, characterized in that, The detection module includes at least one of a pressure sensor, a mechanical limit switch, a laser beam sensor, and an infrared sensor.

13. The lubricating pump according to claim 9, characterized in that, A one-way valve is arranged on the oil pump pipe joint. When the gun oil pipe joint is connected to the oil pump pipe joint, the one-way valve is turned on. When the gun oil pipe joint is disconnected from the oil pump pipe joint, the one-way valve is closed to prevent grease from flowing out of the oil pump pipe joint.

14. The lubricating pump according to claim 9, characterized in that, The lubrication pump comprises a power module for supplying power to the lubrication pump. The power module is connected to a pump electrical connector via an electric wire for plugging and matching with a gun electrical connector of a hand-held refueling gun.

15. Handheld fuel gun, characterized in that, include: A grease storage pipe, used for storing lubricant, including an inlet and an outlet; The gun oil pipe joint is communicated with the inlet of the grease storage pipe and is used for quickly docking with the pump oil pipe joint of the lubrication pump to receive the lubricant from the lubrication pump.

16. The hand-held fuel gun according to claim 15, characterized in that, A piston is provided in the grease storage tube, and a push rod is connected to the piston and can extend out of the grease storage tube. The push rod is arranged downward. When the grease storage tube is full of grease, the piston drives the push rod to extend out and push the placement seat, so that the handheld refueling gun is separated from the detection area of ​​the detection module of the lubrication pump.

17. The hand-held fuel gun according to claim 15, wherein, A magnet is arranged at the lower part of the fat storage tube.

18. The hand-held fuel gun according to claim 15, characterized in that, The handheld refueling gun is an electric refueling gun, which includes a rechargeable battery. The charging port of the rechargeable battery is connected to a gun electrical connector, which is connected to the pump electrical connector of the lubrication pump to charge the rechargeable battery of the handheld refueling gun.

19. Centralized lubrication system, characterized in that, Includes lubrication pumps, hand-held oiling guns and dispensers; A lubrication pump, comprising an oil tank, a monitor and a pumping mechanism, wherein the pumping mechanism can draw lubricant from the oil tank and pump it out; an outlet of the pumping mechanism is connected to an electrically controlled switching valve, the electrically controlled switching valve comprises a grease inlet and a first grease outlet and a second grease outlet, the electrically controlled switching valve can control the grease inlet to be connected to only one of the first and second grease outlets, the first grease outlet is connected to a distributor, the second grease outlet is connected to a pump oil pipe joint, a pressure relief module is provided between the second grease outlet and the pump oil pipe joint, and the pressure relief module is connected to the oil tank so as to relieve pressure and overflow when the pressure exceeds a set value; The hand-held refueling gun comprises a grease storage pipe, the inlet of which is connected with a gun oil pipe joint; the pump oil pipe joint and the gun oil pipe joint can be quickly connected and disassembled; The lubrication pump includes a placement seat for placing a hand-held refueling gun, and a detection module is provided on the placement seat for detecting whether the hand-held refueling gun is placed in place. After the hand-held refueling gun is placed on the placement seat, the detection module feeds back a signal to the monitor, and the monitor controls the electronically controlled switching valve to switch to the second grease outlet to discharge grease.

20. The centralized lubrication system according to claim 19, wherein, A piston is provided in the grease storage tube, and a push rod is connected to the piston and can be extended from the grease storage tube. The push rod is arranged downward. When the grease storage tube is full of grease, the piston drives the push rod to extend and push the placement seat, so that the hand-held refueling gun is separated from the detection area of ​​the detection module. The detection module feeds back to the monitor, and the monitor controls the electronically controlled switching valve to discharge grease to the first grease outlet.

21. The centralized lubrication system according to claim 19, characterized in that, A magnet is arranged at the lower part of the fat storage tube, and the detection module is a magnetic induction sensor.

22. The centralized lubrication system according to claim 19, characterized in that, The electrically controlled switching valve is a two-position three-way solenoid valve.

23. The centralized lubrication system according to claim 19, characterized in that, The pressure reducing and overflowing module is a overflow valve, a safety valve or a pressure reducing valve.

24. The centralized lubrication system according to claim 19, wherein, The detection module includes at least one of a pressure sensor, a mechanical limit switch, a laser beam sensor, and an infrared sensor.

25. The centralized lubrication system according to claim 19, wherein, A one-way valve is arranged on the oil pump pipe joint. When the gun oil pipe joint is connected to the oil pump pipe joint, the one-way valve is turned on. When the gun oil pipe joint is disconnected from the oil pump pipe joint, the one-way valve is closed to prevent grease from flowing out of the oil pump pipe joint.

26. The centralized lubrication system according to claim 19, wherein, The lubrication pump includes a power module for powering the lubrication pump, the power module is connected to a pump electrical connector via wires, the handheld refueling gun is an electric refueling gun, includes a rechargeable battery, the charging port of the rechargeable battery is connected to a gun electrical connector for charging the rechargeable battery of the handheld refueling gun, and the gun electrical connector and the pump electrical connector can be quickly connected and disassembled.

27. The centralized lubrication system according to claim 19, characterized in that, The distributor is a two-line distributor, and a two-position four-way solenoid valve is arranged in front of the two-line distributor. The two-position four-way solenoid valve includes two internal oil ports and two external oil ports. One of the two internal oil ports is connected to the oil tank, and the other is connected to the first grease outlet. The two external oil ports are respectively connected to the two inlets of the two-line distributor.

28. The centralized lubrication system according to claim 19, characterized in that, The distributor is a progressive distributor, and there are multiple progressive distributors. The centralized lubrication system includes a two-position four-way solenoid valve, and the two-position four-way solenoid valve includes two internal oil ports and two external oil ports. One of the two internal oil ports is connected to the oil tank and the other is connected to the first grease outlet. Each of the two external oil ports is respectively connected to the inlet of a progressive distributor.

29. The centralized lubrication system according to claim 19, wherein, The distributor is a single-line distributor, and a two-position three-way solenoid valve is arranged in front of the single-line distributor. The two-position three-way solenoid valve includes two internal oil ports and one external oil port. One of the two internal oil ports is connected to the oil tank, and the other is connected to the first grease outlet. An external oil port is connected to the inlet of the single-line distributor.

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