Automatic lubricating device for working machine and working machine

Abstract

This invention relates to the field of work machinery technology, and discloses an automatic lubrication device for work machinery and the work machinery itself. The automatic lubrication device for work machinery includes: a hydraulic drive unit with an oil outlet; an accumulator connected to the oil outlet via a first oil passage; a lubrication tank including a tank body and a piston disposed within the tank body, the piston dividing the tank body into a first chamber and a second chamber; the first chamber connected to the accumulator via a second oil passage, and a first check valve and / or a first switching valve disposed on the second oil passage; a hydraulic oil tank connected to the first chamber via a third oil passage, and a second switching valve disposed on the third oil passage; a lubrication oil tank connected to the second chamber via a fourth oil passage, and a third switching valve disposed on the fourth oil passage; and an oil injector connected to the second chamber via a fifth oil passage, and a second check valve and / or a fourth switching valve disposed on the fifth oil passage. This invention reduces the manufacturing cost of the device by reducing the number of pumps in the automatic lubrication device.

Description

Technical Field

[0001] This invention relates to the field of work machinery technology, specifically to an automatic lubrication device for work machinery and the work machinery itself. Background Technology

[0002] To extend the service life of various components on the machinery, operators usually lubricate them to ensure they are always in good lubrication condition.

[0003] To reduce downtime for maintenance and ensure construction progress, some existing construction machinery typically employs automatic lubrication systems to lubricate its components. However, most current automatic lubrication solutions include lubrication pumps and grease pumps, resulting in relatively high manufacturing costs. Summary of the Invention

[0004] In view of this, the present invention provides an automatic lubrication device for operating machinery and the operating machinery itself, so as to solve the problem of high manufacturing cost of existing automatic lubrication solutions for operating machinery.

[0005] In a first aspect, the present invention provides an automatic lubrication device for a working machine, comprising:

[0006] Hydraulic drive components are equipped with oil outlets;

[0007] The accumulator is connected to the oil outlet via the first oil passage;

[0008] A lubrication tank includes a tank body and a piston disposed within the tank body, the piston dividing the tank body into a first chamber and a second chamber; the first chamber is connected to the accumulator via a second oil passage and a first check valve and / or a first switching valve are disposed on the second oil passage;

[0009] A hydraulic oil tank is connected to the first chamber via a third oil circuit, and a second switching valve is installed on the third oil circuit;

[0010] The lubricating oil tank is connected to the second chamber via a fourth oil passage, and a third switching valve is installed on the fourth oil passage;

[0011] The oil injector is connected to the second chamber via a fifth oil passage, and a second check valve and / or a fourth switching valve are provided on the fifth oil passage.

[0012] Beneficial Effects: This invention utilizes a piston to divide the lubrication tank into two non-connected chambers, a first chamber and a second chamber. By changing the pressure on both sides of the piston (i.e., changing the pressure difference between the first and second chambers), the automatic lubrication device can not only automatically lubricate the components of the machinery but also replenish the lubrication tank after lubrication, ensuring continuous lubrication operation. This keeps the machinery components constantly lubricated, reducing downtime for maintenance and improving work efficiency. Furthermore, the automatic lubrication device of this invention eliminates the need for a lubrication pump and a grease replenishment pump, thus reducing manufacturing and maintenance costs and facilitating widespread application.

[0013] In one optional embodiment, the second chamber is provided with a hydraulic cylinder and / or a spring, the telescopic end of the hydraulic cylinder is connected to the piston, and the fixed end of the hydraulic cylinder is connected to the bottom wall of the second chamber; the spring is connected between the piston and the bottom wall of the second chamber.

[0014] Beneficial effects: By setting a cylinder and / or spring in the second chamber, the present invention can accelerate the movement speed of the piston in the barrel, thereby shortening the response time of the automatic lubrication device for lubrication and grease replenishment operations.

[0015] In one optional embodiment, the second chamber is provided with an oil cylinder, and the automatic lubrication device of the working machine further includes a first sub-oil circuit, one end of which is connected to the rod chamber of the oil cylinder, and the other end of which is connected to the end of the second oil circuit near the first chamber.

[0016] Beneficial effects: This invention connects the rod chamber of the hydraulic cylinder to the second hydraulic circuit through the first sub-oil circuit. This allows the hydraulic cylinder to accelerate the piston inside the barrel to move away from the first chamber under the energy provided by the accumulator. This enables the lubricating oil in the second chamber to enter the lubricator through the fifth hydraulic circuit in a short time, thereby facilitating rapid lubrication of various parts of the working machinery and ensuring the working efficiency of the machinery.

[0017] In one optional embodiment, a reversing valve is further included, the reversing valve having a first interface, a second interface and a third interface, the first interface being connected to the rodless chamber of the cylinder via a second sub-oil circuit, the second interface being connected to the hydraulic tank via a third sub-oil circuit, and the third interface being connected to the accumulator via a fourth sub-oil circuit.

[0018] Beneficial effects: By setting a reversing valve between the rodless chamber of the cylinder, the hydraulic oil tank and the accumulator, the present invention can change the flow direction of the hydraulic oil in the rodless chamber of the cylinder, thereby ensuring that the automatic lubrication device can flexibly switch between the two processes of lubrication and grease application, thus ensuring the stability of the automatic lubrication device.

[0019] In one optional embodiment, a first limit switch is provided in the first chamber, and a second limit switch is provided in the rodless chamber of the cylinder. The first limit switch and the second limit switch are electrically connected to the controller of the working machine, and the controller of the working machine is electrically connected to the first switch valve, the second switch valve, the third switch valve and the fourth switch valve, respectively.

[0020] Beneficial Effects: This invention utilizes a first limit switch and a second limit switch to monitor the piston's position within the cylinder, thereby determining the operational status of the automatic lubrication device. Subsequently, the first and second limit switches are connected to the controller of the operating machinery. This controller is then electrically connected to a first, second, third, and fourth switching valve. The controller can then control these valves to perform corresponding operations based on signals from the first and second limit switches, ensuring the safe and stable operation of the automatic lubrication device. Furthermore, by electrically connecting the automatic lubrication device to the operating machinery's controller, this invention achieves automated control of the automatic lubrication device, reducing operator intervention.

[0021] In an alternative embodiment, a pressure sensor is also included, the accumulator is connected to the pressure sensor, and the pressure sensor is electrically connected to the controller of the operating machine.

[0022] Beneficial effects: By connecting the pressure sensor to the accumulator and the controller of the working machinery, the pressure sensor can not only monitor the pressure changes inside the accumulator in real time, but also transmit the monitored information to the controller of the working machinery. In this way, the controller can control the relevant structures or equipment in the automatic lubrication device to perform corresponding operations based on the information transmitted by the pressure sensor, thereby ensuring that the automatic lubrication device can successfully complete the lubrication and grease replenishment operations.

[0023] In one alternative embodiment, a third check valve and / or a fifth switching valve are provided between the first oil circuit and the accumulator.

[0024] Beneficial effects: By providing a third one-way valve and / or a fifth switching valve between the first oil circuit and the accumulator, the present invention can prevent the energy stored in the accumulator from flowing back into the first oil circuit. This reduces energy dispersion and ensures that the energy stored in the accumulator can be used to the lubrication tank to the maximum extent, thereby ensuring that the lubrication tank can continuously and effectively provide lubricating oil to the working machinery or ensure that the lubrication tank can smoothly complete the grease replenishment operation.

[0025] In one alternative implementation, the first oil circuit is connected to the hydraulic oil tank.

[0026] Beneficial effects: By connecting the first oil circuit to the hydraulic oil tank, the oil outlet of the hydraulic drive component is connected to the hydraulic oil tank, which allows the hydraulic oil in the hydraulic drive component to return to the hydraulic oil tank, enabling the hydraulic drive component to operate normally.

[0027] In one optional embodiment, a throttle valve is provided between the first oil circuit and the hydraulic oil tank.

[0028] Beneficial effects: By installing a throttle valve between the first oil circuit and the hydraulic oil tank, the present invention can reduce the amount of hydraulic oil flowing back into the hydraulic oil tank, thereby allowing more hydraulic oil to flow to the accumulator, shortening the energy storage time of the accumulator, and improving the response speed of the automatic lubrication device.

[0029] Secondly, the present invention also provides a working machine, comprising:

[0030] Working device, including boom;

[0031] The traveling device is connected to the boom via a slewing device;

[0032] The controller is connected to the boom, the slewing device, and the traveling device;

[0033] The automatic lubrication device of the aforementioned operating machinery is connected to the boom or the slewing device via the hydraulic drive component.

[0034] Beneficial effects: The automatic lubrication device in this invention can not only automatically lubricate the various parts of the working machinery, but also automatically replenish the lubrication tank. In this way, the automatic lubrication device can continuously perform lubrication operations, thereby reducing the downtime of the working machinery for maintenance and improving work efficiency. Attached Figure Description

[0035] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0036] Figure 1 This is a schematic diagram of the connection relationship of an automatic lubrication device for a work machine according to an embodiment of the present invention;

[0037] Figure 2 This is a schematic diagram of the connection relationship of an automatic lubrication device for another type of work machinery according to an embodiment of the present invention.

[0038] Explanation of reference numerals in the attached figures:

[0039] 1. Hydraulic drive components; 101. Oil outlet; 102. First oil circuit; 1021. Third check valve; 1022. Fifth switching valve; 1023. Throttle valve; 2. Accumulator; 201. Second oil circuit; 2011. First check valve; 2012. First switching valve; 2013. First sub-oil circuit; 3. Lubrication tank; 301. Tank body; 3011. First chamber; 3012. Second chamber; 302. Piston; 303. Cylinder; 304. Spring 305. First limit switch; 306. Second limit switch; 4. Hydraulic oil tank; 401. Third oil circuit; 4011. Second switching valve; 5. Lubricating oil tank; 501. Fourth oil circuit; 5011. Third switching valve; 6. Oil injector; 601. Fifth oil circuit; 6011. Second check valve; 6012. Fourth switching valve; 7. Directional valve; 701. Second sub-oil circuit; 702. Third sub-oil circuit; 703. Fourth sub-oil circuit; 8. Pressure sensor. Detailed Implementation

[0040] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0041] To address the issue of high manufacturing costs associated with existing automatic lubrication solutions for machinery, this invention provides an automatic lubrication device and the machinery itself.

[0042] The following is combined with Figures 1 to 2 The following describes embodiments of the present invention.

[0043] According to an embodiment of the present invention, an automatic lubrication device for a working machine is provided, which mainly includes: a hydraulic drive component 1, an accumulator 2, a lubrication tank 3, a hydraulic oil tank 4, a lubrication oil tank 5, and an oil injector 6.

[0044] Specifically, the hydraulic drive unit 1 is provided with an oil outlet 101; the accumulator 2 is connected to the oil outlet 101 through a first oil passage 102; the lubrication tank 3 includes a tank body 301 and a piston 302 disposed within the tank body 301, the piston 302 dividing the tank body 301 into a first chamber 3011 and a second chamber 3012; the first chamber 3011 is connected to the accumulator 2 through a second oil passage 201, and a first check valve 2011 and / or a first switching valve 201 are provided on the second oil passage 201. 2; Hydraulic oil tank 4 is connected to the first chamber 3011 via the third oil passage 401 and a second switching valve 4011 is installed on the third oil passage 401; Lubricating oil tank 5 is connected to the second chamber 3012 via the fourth oil passage 501 and a third switching valve 5011 is installed on the fourth oil passage 501; Oil injector 6 is connected to the second chamber 3012 via the fifth oil passage 601 and a second check valve 6011 and / or a fourth switching valve 6012 is installed on the fifth oil passage 601.

[0045] It should be noted that the hydraulic drive component 1 in this embodiment of the invention may be, but is not limited to, a boom cylinder or a hydraulic motor. Furthermore, in this embodiment, the first chamber 3011 and the second chamber 3012 are not connected, and the first chamber 3011 is suitable for containing hydraulic oil, while the second chamber 3012 is suitable for containing lubricating oil.

[0046] The following description uses the boom cylinder as an example to further illustrate this embodiment.

[0047] Since the boom cylinder can drive the boom of the working machinery to move up and down, the oil outlet 101 of the boom cylinder is connected to the accumulator 2. This allows the potential energy generated during the boom's descent to be converted into hydraulic energy and stored in the accumulator 2. When the pressure in the accumulator 2 reaches a preset requirement, the hydraulic energy in the accumulator 2 is transported to the first chamber 3011 of the lubrication tank 3 through the second oil passage 201. This creates a pressure difference on both sides of the piston 302 (at this time, the pressure in the first chamber 3011 is higher than the pressure in the second chamber 3012). Subsequently, under the action of the hydraulic oil, the piston 302 moves towards the direction of the second chamber 3012, allowing the lubricating oil in the second chamber 3012 to enter the lubricator 6 through the fifth oil passage 601. In this way, the automatic lubrication device in this embodiment achieves automatic lubrication of the working machinery.

[0048] It is understandable that, in order to ensure the lubrication effect and response speed of the automatic lubrication device in this embodiment, when the automatic lubrication device needs to lubricate the working machinery, the second switch valve 4011 on the third oil circuit 401 and the third switch valve 5011 on the fourth oil circuit 501 need to be set to the closed state. This setting allows the hydraulic energy in the accumulator 2 to enter the first chamber 3011 to the maximum extent, and also allows the lubricating oil in the second chamber 3012 to be transported to the oiler 6 to the maximum extent.

[0049] Furthermore, since the first chamber 3011 of the automatic lubrication device in this embodiment is connected to the hydraulic oil tank 4 via the third oil passage 401, and the second chamber 3012 is connected to the lubricating oil tank 5 via the fourth oil passage 501, after the automatic lubrication device completes its automatic lubrication operation, connecting the first chamber 3011 to the hydraulic oil tank 4 and the second chamber 3012 to the lubricating oil tank 5 allows the hydraulic oil in the first chamber 3011 to be discharged into the hydraulic oil tank 4 due to the higher pressure in the first chamber 3011 compared to the hydraulic oil tank 4. Similarly, utilizing the pressure difference between the second chamber 3012 and the lubricating oil tank 5, the lubricating oil in the second chamber 3012 is transported to the second chamber 3012 due to the lower pressure in the lubricating oil tank 5. In this way, the automatic lubrication device in this embodiment achieves automatic grease replenishment, ensuring continuous lubrication operation. It is understood that the automatic lubrication operation and automatic grease replenishment operation of the automatic lubrication device in this embodiment will not be performed simultaneously. Therefore, when the automatic lubrication device in this embodiment needs to perform automatic grease replenishment operation, it is necessary to close the first switch valve 2012 on the second oil circuit 201 and the fourth switch valve 6012 on the fifth oil circuit 601.

[0050] In summary, the automatic lubrication device in this embodiment not only automatically lubricates the various components of the working machinery, but also replenishes the lubrication tank 3 with grease after lubrication, thereby ensuring continuous lubrication operation. This keeps all components of the working machinery in a lubricated state, reducing downtime for maintenance and improving work efficiency. Furthermore, compared to automatic lubrication systems that require both lubrication pumps and grease replenishment pumps, the automatic lubrication device in this embodiment reduces the number of pumps used, effectively lowering the manufacturing cost and subsequent maintenance costs, thus facilitating its widespread application.

[0051] It should be noted that if a hydraulic motor is selected as the hydraulic drive component 1, the energy of the hydraulic motor's rotation braking can be stored using the accumulator 2.

[0052] According to one embodiment of the present invention, a hydraulic cylinder 303 and / or a spring 304 are provided in the second chamber 3012. The telescopic end of the hydraulic cylinder 303 is connected to the piston 302, and the fixed end of the hydraulic cylinder 303 is connected to the bottom wall of the second chamber 3012. The spring 304 is connected between the piston 302 and the bottom wall of the second chamber 3012.

[0053] In embodiments of the present invention, by providing an oil cylinder 303 and / or a spring 304 in the second chamber 3012, the movement speed of the piston 302 in the barrel 301 can be accelerated, thereby shortening the response time of the automatic lubrication device for lubrication and grease replenishment operations.

[0054] According to one embodiment of the present invention, a hydraulic cylinder 303 is provided in the second chamber 3012, and the automatic lubrication device of the working machine further includes a first sub-oil passage 2013. One end of the first sub-oil passage 2013 is connected to the rod chamber of the hydraulic cylinder 303, and the other end is connected to the end of the second oil passage 201 near the first chamber 3011.

[0055] In embodiments of the present invention, the rod chamber of the hydraulic cylinder 303 is connected to the second hydraulic circuit 201 via the first sub-oil circuit 2013. This allows the hydraulic cylinder 303, under the energy provided by the accumulator 2, to accelerate the movement of the piston 302 in the barrel 301 toward the direction away from the first chamber 3011. This enables the lubricating oil in the second chamber 3012 to enter the lubricator 6 through the fifth hydraulic circuit 601 in a short time, thereby facilitating rapid lubrication of various components of the working machinery and ensuring the working efficiency of the working machinery. Furthermore, since the first sub-oil circuit 2013 connects the rod chamber of the cylinder 303 to the second oil circuit 201, it also means that the rod chamber of the cylinder 303 is connected to the first chamber 3011. Therefore, when the second chamber 3012 needs to be greased, the hydraulic oil in the rod chamber of the cylinder 303 will also be discharged into the hydraulic oil tank 4 at the same time. This can prevent the oil in the rod chamber of the cylinder 303 from being discharged in time, thereby ensuring that the piston 302 can move smoothly in the direction of the first chamber 3011.

[0056] It is understood that, since this embodiment connects the rod chamber of the oil cylinder 303 to the second oil circuit 201 through the first sub-oil circuit 2013, there is no need to set up an additional oil supply device and oil discharge device for the oil cylinder 303, thereby simplifying the structure of the automated lubrication device and reducing the manufacturing cost and subsequent maintenance cost of the automated lubrication device.

[0057] According to one embodiment of the present invention, a reversing valve 7 is further included. The reversing valve 7 has a first interface, a second interface and a third interface. The first interface is connected to the rodless chamber of the cylinder 303 through a second sub-oil passage 701. The second interface is connected to the hydraulic oil tank 4 through a third sub-oil passage 702. The third interface is connected to the accumulator 2 through a fourth sub-oil passage 703.

[0058] It is understood that, according to the state of the automatic lubrication device, i.e., whether it is in the lubrication state or the grease replenishment state, the reversing valve 7 can selectively connect the rodless chamber of the cylinder 303 to the hydraulic oil tank 4 or connect the rodless chamber of the cylinder 303 to the accumulator 2, thereby ensuring that the automatic lubrication device can flexibly switch between the lubrication and grease replenishment processes, thus ensuring the stability of the automatic lubrication device.

[0059] For example, when the rodless chamber of the cylinder 303 in this embodiment is connected to the hydraulic oil tank 4 through the reversing valve 7, the automatic lubrication device is in a lubrication state. Therefore, in order to avoid the cylinder 303 affecting the movement of the piston 302, the hydraulic oil in the rodless chamber of the cylinder 303 needs to be discharged into the hydraulic oil tank 4 in a timely manner. When the rodless chamber of the cylinder 303 in this embodiment is connected to the accumulator 2 through the reversing valve 7, the automatic lubrication device is in a grease replenishment state. Since the accumulator 2 stores a certain amount of hydraulic energy, when the hydraulic energy in the accumulator 2 enters the rodless chamber of the cylinder 303, it can accelerate the speed at which the piston 302 moves toward the direction of the first chamber 3011, thereby accelerating the grease replenishment process of the automatic lubrication device.

[0060] In addition, in this embodiment, the second sub-oil circuit 701, the third sub-oil circuit 702 and the fourth sub-oil circuit 703 are connected together by a reversing valve 7, which can reduce the number of connecting parts used in the automatic lubrication device and simplify the structure of the automatic lubrication device.

[0061] It should be noted that the reversing valve 7 in this embodiment can be a two-position three-way valve, as long as it can change the connection relationship between the rodless chamber of the cylinder 303 and the hydraulic oil tank 4 and the accumulator 2. This invention does not impose any specific limitations on this.

[0062] According to one embodiment of the present invention, a first limit switch 305 is provided in the first chamber 3011, and a second limit switch 306 is provided in the rodless chamber of the hydraulic cylinder 303. The first limit switch 305 and the second limit switch 306 are electrically connected to the controller of the working machine, and the controller of the working machine is electrically connected to the first switching valve 2012, the second switching valve 4011, the third switching valve 5011 and the fourth switching valve 6012, respectively.

[0063] In embodiments of the present invention, by using a first limit switch 305 and a second limit switch 306, the position of the piston 302 within the barrel 301 can be monitored, thereby determining the operating status of the automatic lubrication device. Subsequently, the first limit switch 305 and the second limit switch 306 are connected to the controller of the operating machinery. The controller of the operating machinery is electrically connected to the first switching valve 2012, the second switching valve 4011, the third switching valve 5011, and the fourth switching valve 6012. This allows the controller of the operating machinery to control the first switching valve 2012, the second switching valve 4011, the third switching valve 5011, and the fourth switching valve 6012 to perform corresponding operations based on the signals emitted by the first limit switch 305 and the second limit switch 306, thereby ensuring the safe and stable operation of the automatic lubrication device. Furthermore, by electrically connecting the automatic lubrication device to the controller of the operating machinery, embodiments of the present invention achieve automated control of the automatic lubrication device by the controller of the operating machinery, reducing operator intervention.

[0064] It should be noted that the first limit switch 305 and the second limit switch 306 in this embodiment can be limit switches. The first switching valve 2012, the second switching valve 4011, the third switching valve 5011 and the fourth switching valve 6012 in this embodiment can be two-position two-way solenoid valves.

[0065] It is understandable that, to further reduce the manufacturing cost of the automatic lubrication device in this embodiment, the first switching valve 2012, the second switching valve 4011, the third switching valve 5011, and the fourth switching valve 6012 can be configured as manual control valves (e.g., two-position two-way manual valves). In this case, the operator needs to manually adjust the states of the first switching valve 2012, the second switching valve 4011, the third switching valve 5011, and the fourth switching valve 6012 according to the specific situation to ensure that the automatic lubrication device can switch between lubrication and grease application processes.

[0066] According to one embodiment of the present invention, a pressure sensor 8 is also included, the accumulator 2 is connected to the pressure sensor 8, and the pressure sensor 8 is electrically connected to the controller of the working machine.

[0067] In embodiments of the present invention, by connecting the pressure sensor 8 to the accumulator 2 and the controller of the working machinery, the pressure sensor 8 can not only monitor the pressure changes inside the accumulator 2 in real time, but also transmit the monitored information to the controller of the working machinery. In this way, the controller can control the relevant structures or equipment in the automatic lubrication device to perform corresponding operations based on the information transmitted by the pressure sensor 8, thereby ensuring that the automatic lubrication device can smoothly complete the lubrication and grease replenishment operations.

[0068] According to one embodiment of the present invention, a third check valve 1021 and / or a fifth switching valve 1022 are provided between the first oil circuit 102 and the accumulator 2.

[0069] In embodiments of the present invention, a third one-way valve 1021 and / or a fifth switching valve 1022 are provided between the first oil circuit 102 and the accumulator 2. This prevents the energy stored in the accumulator 2 from flowing back into the first oil circuit 102. This reduces energy dispersion and ensures that the energy stored in the accumulator 2 can be used to maximize the effect on the lubrication tank 3. This ensures that the lubrication tank 3 can continuously and effectively provide lubricating oil to the working machinery or can smoothly complete the grease replenishment operation.

[0070] According to one embodiment of the present invention, the first oil passage 102 is connected to the hydraulic oil tank 4. By connecting the first oil passage 102 to the hydraulic oil tank 4, the oil outlet 101 of the hydraulic drive component 1 is connected to the hydraulic oil tank 4, allowing the hydraulic oil in the hydraulic drive component 1 to return to the hydraulic oil tank 4, thus enabling the hydraulic drive component 1 to operate normally.

[0071] According to one embodiment of the present invention, a throttle valve 1023 is provided between the first oil passage 102 and the hydraulic oil tank 4. By providing a throttle valve 1023 between the first oil passage 102 and the hydraulic oil tank 4, the embodiment of the present invention can reduce the amount of hydraulic oil flowing back to the hydraulic oil tank 4, thereby allowing more hydraulic oil to flow to the accumulator 2, shortening the energy storage time of the accumulator 2, and improving the response speed of the automatic lubrication device.

[0072] The specific working process of the automatic lubrication device in the embodiments of the present invention is described below:

[0073] By opening the fifth switching valve 1022 and the throttle valve 1023 on the first oil circuit 102, a portion of the hydraulic oil in the hydraulic drive component 1 flows to the accumulator 2 for energy storage, while the other portion of the hydraulic oil flows back to the hydraulic oil tank 4, ensuring that the hydraulic drive component 1 can operate normally. When the pressure sensor 8 detects that the pressure in the accumulator 2 reaches the preset requirement, the pressure sensor 8 will send the signal to the controller, and then the controller will determine whether the second limit switch 306 in the hydraulic cylinder has been triggered.

[0074] If the second limit switch 306 is not triggered, the controller will open the first switch valve 2012 and the fourth switch valve 6012 on the second oil circuit 201, and close the second switch valve 4011 and the third switch valve 5011. At the same time, it will control the reversing valve 7 to connect the rodless chamber of the cylinder 303 to the hydraulic oil tank 4. With this setting, the hydraulic energy in the accumulator 2 can enter the first chamber 3011 of the lubrication tank 3 and the rod chamber of the cylinder 303 through the second oil circuit 201, so that the piston 302 moves continuously in the direction of the second chamber 3012. When the pressure in the second chamber 3012 reaches the pressure value of the second check valve 6011 on the fifth oil circuit 601, the lubricator 6 will activate to complete one lubrication operation.

[0075] If the second limit switch 306 is triggered, the controller will close the first switch valve 2012 and the fourth switch valve 6012, and open the second switch valve 4011 and the third switch valve 5011. Simultaneously, it controls the directional valve 7 to connect the rodless chamber of the cylinder 303 to the accumulator 2. This configuration allows hydraulic energy from the accumulator 2 to enter the rodless chamber of the cylinder 303 through the second sub-oil circuit 701 and the fourth sub-oil circuit 703. It also allows hydraulic oil from the first chamber 3011 of the lubrication tank 3 and the rod chamber of the cylinder 303 to flow into the hydraulic oil tank 4. Furthermore, it allows lubricating oil from the lubrication tank 5 to enter the second chamber 3012 of the lubrication tank 3 through the fourth oil circuit 501. This causes the piston 302 to continuously move towards the first chamber 3011. When the piston 302 comes into contact with the first limit switch 305 in the first chamber 3011, a grease replenishment operation is completed.

[0076] According to an embodiment of the present invention, another aspect provides a working machine, including: a working device, a traveling device, a controller, and an automatic lubrication device for the aforementioned working machine.

[0077] Specifically, the working device includes a boom; the traveling device is connected to the boom via a slewing device; the controller is connected to the boom, the slewing device, and the traveling device; and the automatic lubrication device of the aforementioned working machinery is connected to the boom or the slewing device via a hydraulic drive 1.

[0078] Since the automatic lubrication device in this embodiment can not only automatically lubricate the various parts of the working machinery, but also automatically replenish the grease in the lubrication tank 3, the automatic lubrication device can continuously perform lubrication operations, thereby reducing the downtime of the working machinery for maintenance and improving work efficiency.

[0079] Furthermore, the automatic lubrication device in this embodiment of the invention can utilize the energy generated by the hydraulic drive component 1 on the working machinery, such as the boom's falling potential energy and the energy of the slewing brake, as the initial power for lubrication and grease replenishment operations. This not only improves the energy utilization rate but also reduces the number of power devices used in the automatic lubrication device, thereby reducing the manufacturing cost of the automatic lubrication device.

[0080] Although embodiments of the invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. An automatic lubrication device for operating machinery, characterized in that, include: Hydraulic drive components are equipped with oil outlets; The accumulator is connected to the oil outlet via the first oil passage; A lubrication tank includes a tank body and a piston disposed within the tank body, the piston dividing the tank body into a first chamber and a second chamber; the first chamber is connected to the accumulator via a second oil passage and a first check valve or a first switching valve is disposed on the second oil passage; A hydraulic oil tank is connected to the first chamber via a third oil circuit, and a second switching valve is installed on the third oil circuit; The lubricating oil tank is connected to the second chamber via a fourth oil passage, and a third switching valve is installed on the fourth oil passage; The oil injector is connected to the second chamber via a fifth oil passage and a second check valve is provided on the fifth oil passage; or, a second check valve and a fourth switching valve are provided on the fifth oil passage. The second chamber is equipped with a hydraulic cylinder and a spring; or, the second chamber is equipped with a hydraulic cylinder. The automatic lubrication device of the operating machinery also includes a first sub-oil circuit, one end of which is connected to the rod chamber of the oil cylinder, and the other end is connected to the end of the second oil circuit near the first chamber.

2. The automatic lubrication device for the operating machinery according to claim 1, characterized in that, The telescopic end of the hydraulic cylinder is connected to the piston, and the fixed end of the hydraulic cylinder is connected to the bottom wall of the second chamber; the spring is connected between the piston and the bottom wall of the second chamber.

3. The automatic lubrication device for operating machinery according to claim 2, characterized in that, It also includes a reversing valve, which has a first interface, a second interface and a third interface. The first interface is connected to the rodless chamber of the cylinder through a second sub-oil circuit, the second interface is connected to the hydraulic tank through a third sub-oil circuit, and the third interface is connected to the accumulator through a fourth sub-oil circuit.

4. The automatic lubrication device for the operating machinery according to claim 3, characterized in that, The first chamber is provided with a first limit switch, and the rodless chamber of the cylinder is provided with a second limit switch. The first limit switch and the second limit switch are electrically connected to the controller of the working machine, and the controller of the working machine is electrically connected to the first switch valve, the second switch valve, the third switch valve and the fourth switch valve.

5. The automatic lubrication device for the operating machinery according to claim 4, characterized in that, It also includes a pressure sensor, the accumulator is connected to the pressure sensor, and the pressure sensor is electrically connected to the controller of the working machine.

6. The automatic lubrication device for the operating machinery according to any one of claims 1 to 5, characterized in that, A third check valve and a fifth switching valve are provided between the first oil circuit and the accumulator.

7. The automatic lubrication device for operating machinery according to claim 6, characterized in that, The first oil circuit is connected to the hydraulic oil tank.

8. The automatic lubrication device for operating machinery according to claim 7, characterized in that, A throttle valve is provided between the first oil circuit and the hydraulic oil tank.

9. A type of operating machinery, characterized in that, include: Working device, including boom; The traveling device is connected to the boom via a slewing device; The controller is connected to the boom, the slewing device, and the traveling device; The automatic lubrication device of the operating machinery according to any one of claims 1 to 8 is connected to the boom or the slewing device via the hydraulic drive component.

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