Chain lubricating oil system with quantitative oil outlet function

Abstract

The utility model provides a chain lubricating oil system with quantitative oil outlet, which relates to the technical field of excavator hydraulic systems and comprises a first oil way, a piston cylinder, a lubricating oil tank, a lubricating oil way, an air suction passage and a second backpressure one-way valve. One end of the first oil way communicates with a first cavity of the piston cylinder and is used for supplying hydraulic oil into the first cavity of the piston cylinder or discharging the hydraulic oil in the first cavity of the piston cylinder. A second cavity of the piston cylinder communicates with the lubricating oil tank and is used for discharging gas in the second cavity through the piston cylinder to supply gas into the lubricating oil tank; one end of the lubricating oil circuit is communicated with an outlet of the lubricating oil tank, the other end of the lubricating oil circuit is provided with a chain lubricating oil outlet, and the chain lubricating oil outlet is formed above the chain and used for discharging lubricating oil in the lubricating oil tank from the chain lubricating oil outlet through the lubricating oil circuit and flowing onto the chain to lubricate the chain. Air is supplied into the lubricating oil tank through the piston cylinder while the hydraulic motor drives the chain to rotate, and the lubricating oil tank is forced to discharge quantitative lubricating oil to lubricate the chain.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic system technology for excavators, and in particular to a chain lubrication system with quantitative oil output. Background Technology

[0002] Currently, excavators typically transmit power through a hydraulic system to control the head changer and perform various actions. The excavator's hydraulic system is an assembly that organically connects various hydraulic components via pipelines according to the transmission requirements of the head changer and other mechanisms. The hydraulic motor is the actuator of the excavator's hydraulic system, converting the pressure energy of the hydraulic oil into mechanical energy to drive the chain of the head changer to rotate, thereby driving the head changer to perform various actions. As the main transmission component of the head changer, the chain inevitably experiences wear or rust due to frequent use. Therefore, to prevent the chain from jamming, blocking, or even breaking during rotation, it is usually lubricated while rotating to ensure normal chain operation.

[0003] In existing technologies, chain lubrication typically utilizes hydraulic oil within the hydraulic motor housing. When the hydraulic motor drives the chain to rotate, hydraulic oil from the motor housing is drained through the motor's drain port and guided to the chain via hydraulic lines, thus lubricating it. However, this method continuously consumes hydraulic oil from the excavator's hydraulic system. Excessive oil consumption can lead to system malfunction, and hydraulic oil is expensive, making it unsuitable for wasting excessive amounts of oil on chain lubrication. Utility Model Content

[0004] The purpose of this invention is to provide a chain lubrication system with quantitative oil dispensing to solve at least one of the aforementioned technical problems in the prior art.

[0005] To solve the above-mentioned technical problems, this utility model provides a chain lubrication system with quantitative oil output, comprising: a first oil circuit, a piston cylinder, a lubricating oil tank, a lubricating oil circuit, an air intake passage, and a second back pressure check valve;

[0006] One end of the first oil circuit is connected to the first chamber of the piston cylinder, and is used to supply hydraulic oil to the first chamber of the piston cylinder or to discharge hydraulic oil from the first chamber of the piston cylinder;

[0007] The second chamber of the piston cylinder is connected to the lubricating oil tank and is used to discharge the gas in the second chamber through the piston cylinder to supply gas into the lubricating oil tank.

[0008] One end of the lubricating oil circuit is connected to the outlet of the lubricating oil tank, and the other end is set as the chain lubrication oil outlet. The chain lubrication oil outlet is located above the chain, so that the lubricating oil in the lubricating oil tank can be discharged from the chain lubrication oil outlet through the lubricating oil circuit and flow onto the chain to lubricate the chain.

[0009] Among them, the lubricating oil can be engine oil or waste hydraulic oil, which has a low cost;

[0010] One end of the air intake passage is connected to the second chamber of the piston cylinder, and the other end is connected to the atmosphere, for the second chamber of the piston cylinder to draw in air;

[0011] A second back pressure check valve is provided on the intake passage. The inlet of the second back pressure check valve is connected to the other end of the intake passage, and the outlet of the second back pressure check valve is connected to the second chamber of the piston cylinder. This is used to allow gas to flow unidirectionally from the intake passage to the second chamber of the piston cylinder, preventing gas and / or lubricating oil from being discharged from the intake passage.

[0012] This application sequentially connects the first oil circuit, piston cylinder, first passage, lubricating oil tank and lubricating oil circuit. The piston cylinder supplies air to the lubricating oil tank, forcing the lubricating oil tank to discharge a certain amount of lubricating oil to lubricate the chain. Since there is no need to waste hydraulic oil in the excavator's hydraulic system, the cost of chain lubrication is greatly reduced.

[0013] Furthermore, the chain lubrication system with quantitative oil dispensing also includes a hydraulic motor, an oil supply circuit, and an oil return circuit;

[0014] One end of the oil supply circuit is connected to the oil inlet of the hydraulic motor, and is used to supply hydraulic oil into the hydraulic motor.

[0015] One end of the return oil circuit is connected to the return oil port of the hydraulic motor, and is used for the return of hydraulic oil in the hydraulic motor.

[0016] The hydraulic motor is used to drive the chain to rotate;

[0017] The other end of the first oil circuit can be selectively connected to the oil supply circuit, the drain port of the hydraulic motor, or the oil return circuit.

[0018] Furthermore, the chain lubrication system with quantitative oil output also includes a hydraulic oil source, and the other end of the oil supply circuit is connected to the hydraulic oil source, so that the hydraulic oil from the hydraulic oil source flows into the oil supply circuit.

[0019] Furthermore, the chain lubrication system with quantitative oil output also includes a return oil tank, and the other end of the return oil circuit is connected to the return oil tank for hydraulic oil to flow back from the return oil circuit into the return oil tank.

[0020] Furthermore, a first back pressure check valve is provided on the return oil line. The inlet of the first back pressure check valve is connected to the return oil port of the hydraulic motor, and the outlet of the first back pressure check valve is connected to the return oil tank, so that hydraulic oil can flow unidirectionally from the return oil line to the return oil tank.

[0021] When the other end of the first oil circuit is connected to the return oil circuit, the other end of the first oil circuit is connected between the hydraulic motor and the first back pressure check valve. The hydraulic oil flowing out of the return oil port of the hydraulic motor flows to the first back pressure check valve, and the first back pressure check valve generates back pressure, forcing the hydraulic oil to flow from the first oil circuit into the first chamber of the piston cylinder.

[0022] Furthermore, a filter is also provided in the air intake passage. The filter is located on the inlet side of the second back pressure check valve and is used to filter impurities in the air.

[0023] Furthermore, the second chamber of the piston cylinder is provided with a tube on the side opposite to the first chamber, and the tube is connected to the lubricating oil tank;

[0024] The piston of the piston cylinder has a push rod on the end face opposite to the first chamber. The push rod is slidably disposed in the tube body and is used to support the push rod through the tube body to prevent the piston from tilting during sliding, which would cause wear on the cylinder wall of the piston cylinder.

[0025] Furthermore, the piston cylinder has an air intake port on its cylinder wall, the air intake port is connected to the second chamber of the piston cylinder, and one end of the air intake passage is connected to the air intake port.

[0026] Furthermore, the air intake is disposed on the wall of the tube body;

[0027] When air is drawn into the second chamber of the piston cylinder, the air flows into the tube and into the second chamber through the gap between the tube and the push rod.

[0028] Furthermore, a compression spring is provided in the second chamber of the piston cylinder, and the compression spring is sleeved on the push rod;

[0029] The compression spring is disposed between the tube and the piston. One end of the compression spring abuts against the tube and the other end abuts against the piston. It is used to push the piston into the first chamber of the piston cylinder by the elastic force of the compression spring, thereby forcing the hydraulic oil in the first chamber of the piston cylinder to be discharged.

[0030] Optionally, the chain lubrication system with quantitative oil dispensing further includes a first passage, one end of which is connected to the second chamber and the other end of which is connected to the inlet of the lubricating oil tank. The second chamber of the piston cylinder is connected to the lubricating oil tank through the first passage for discharging air from the second chamber of the piston cylinder and supplying air to the lubricating oil tank.

[0031] Furthermore, a third back pressure check valve is provided on the first passage. The inlet of the third back pressure check valve is connected to the second chamber of the piston cylinder, and the outlet of the third back pressure check valve is connected to the inlet of the lubricating oil tank. This is used to allow gas to flow unidirectionally from the first passage into the lubricating oil tank, preventing gas and / or lubricating oil from flowing from the first passage into the second chamber of the piston cylinder. When air is drawn into the second chamber of the piston cylinder, the gas and / or lubricating oil in the lubricating oil tank cannot flow into the second chamber of the piston cylinder from the first passage through the third back pressure check valve.

[0032] Of course, the piston cylinder can also be located at the top of the lubricating oil tank, and the oil port of the first chamber of the piston cylinder is located on the tank wall of the lubricating oil tank. One end of the first oil passage is connected to the first chamber of the piston cylinder through the oil port.

[0033] One end of the air intake passage is connected to the inlet of the lubricating oil tank.

[0034] Furthermore, a first partition is provided inside the lubricating oil tank, which divides the lubricating oil tank into an air inlet chamber and an oil outlet chamber from top to bottom.

[0035] The inlet of the lubricating oil tank is connected to the air intake chamber;

[0036] The outlet of the lubricating oil tank is connected to the oil outlet chamber;

[0037] A first through hole is provided at the first corner of the first partition, and the air inlet chamber and the oil outlet chamber are connected through the first through hole for the lubricating oil and gas in the lubricating oil tank to flow between the air inlet chamber and the oil outlet chamber;

[0038] During use, the lubricating oil tank is not tilted or tilted in any direction away from the first through hole. When the level of the lubricating oil in the oil outlet chamber is higher than the outlet of the lubricating oil tank, air is supplied to the lubricating oil tank through the piston cylinder, and the lubricating oil can be discharged from the outlet of the lubricating oil tank, thereby using the lubricating oil to lubricate the chain.

[0039] Furthermore, a second partition is also provided inside the lubricating oil tank. The second partition is located below the first partition, and the lubricating oil tank is divided from top to bottom into an air inlet chamber, an intermediate chamber, and an oil outlet chamber by the first partition and the second partition.

[0040] The second partition has a second through hole at the opposite corner of the first corner. The air inlet chamber, the intermediate chamber and the oil outlet chamber are connected in sequence through the first through hole and the second through hole, so that the lubricating oil and gas in the lubricating oil tank can flow between the air inlet chamber, the intermediate chamber and the oil outlet chamber.

[0041] During use, when the lubricating oil tank is not tilted or tilted in any direction, and the level of the lubricating oil in the oil outlet chamber is higher than the outlet of the lubricating oil tank, air is supplied to the lubricating oil tank through the piston cylinder, and the lubricating oil can be discharged from the outlet of the lubricating oil tank, thereby using the lubricating oil to lubricate the excavator chain.

[0042] Furthermore, a throttle valve is provided in the lubrication oil circuit to regulate the flow rate of the lubrication oil circuit, thereby regulating the oil discharge speed of the chain lubrication outlet.

[0043] Furthermore, the quantitative oil dispensing chain lubrication system also includes a hydraulically controlled check valve and a control oil circuit;

[0044] The hydraulically controlled check valve is installed in the lubrication oil circuit. The outlet of the hydraulically controlled check valve is connected to the outlet of the lubrication oil tank, and the inlet of the hydraulically controlled check valve is connected to the chain lubrication outlet. The control port of the hydraulically controlled check valve is connected to the supply oil circuit or the return oil circuit through the control oil circuit. It is used to control the opening and closing of the lubrication oil circuit. When hydraulic oil is supplied to the hydraulic motor (i.e., hydraulic oil flows from the supply oil circuit to the inlet of the hydraulic motor) or when hydraulic oil returns from the hydraulic motor (i.e., hydraulic oil is discharged from the return oil port of the hydraulic motor), the outlet of the hydraulically controlled check valve is connected to the inlet, and the lubrication oil is discharged from the chain lubrication outlet through the lubrication oil circuit. When the hydraulic oil does not flow or flows in reverse in the supply oil circuit or the return oil circuit, the lubrication oil cannot flow through the hydraulically controlled check valve.

[0045] By adopting the above technical solution, this utility model has the following beneficial effects:

[0046] This utility model provides a chain lubrication system with quantitative oil dispensing, which realizes the supply of air to the lubrication tank through the piston cylinder while the hydraulic motor drives the chain to rotate, forcing the lubrication tank to discharge a quantitative amount of lubricating oil to lubricate the chain. This eliminates the need to waste hydraulic oil in the excavator's hydraulic system and greatly reduces the cost of chain lubrication. Attached Figure Description

[0047] To more clearly illustrate the specific embodiments of this utility model 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 this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0048] Figure 1 A schematic diagram of a chain lubrication system for quantitative oil dispensing provided in an embodiment of this utility model;

[0049] Figure 2 A schematic diagram of a chain lubrication system for quantitative oil dispensing provided in another embodiment of this utility model;

[0050] Figure 3 A cross-sectional view of the piston cylinder provided in this embodiment of the present invention when the second chamber space is compressed to its minimum size;

[0051] Figure 4 for Figure 3 The diagram shows a cross-sectional view of the piston cylinder when the first chamber space is compressed to its minimum.

[0052] Figure 5 This is a schematic diagram of the structure of the lubricating oil tank provided in an embodiment of the present utility model;

[0053] Figure 6 for Figure 5 The diagram shows the internal structure of the lubricating oil tank.

[0054] Figure 7 for Figure 5 The diagram shows the internal structure of the lubricating oil tank when it is tilted in a direction away from the first through hole;

[0055] Figure 8 for Figure 5 The diagram shows a front perspective view of the lubricating oil tank tilted along its length toward the side away from the first through hole.

[0056] Figure 9 for Figure 5 The side perspective view of the lubricating oil tank shown is tilted away from the first through hole along its width.

[0057] Figure 10 This is a schematic diagram of the internal structure of a lubricating oil tank according to another embodiment of the present invention;

[0058] Figure 11 for Figure 10 The diagram shows a perspective view of the lubricating oil tank tilted to both sides along its length.

[0059] Figure 12 for Figure 10The side perspective view of the lubricating oil tank when it is tilted to both sides along the width direction;

[0060] Figure 13 This is a schematic diagram of the internal structure of the lubricating oil tank without the second back pressure check valve, which is provided in another embodiment of the present invention.

[0061] Figure label:

[0062] 1-Hydraulic motor; 2-Piston cylinder; 21-First chamber; 211-Oil port of the first chamber; 22-Second chamber; 221-Intake port; 23-Piston; 24-Pipe body; 25-Push rod; 26-Compression spring; 3-Lubricating oil tank; 301-Inlet of lubricating oil tank; 302-Outlet of lubricating oil tank; 303-Tank cover; 31-First partition; 311-First through hole; 32-Second partition; 321-Second through hole; 33-Intake chamber; 34-Intermediate chamber; 35-Outlet chamber; 4-First back pressure check valve; 5-Second back pressure check valve; 6-Filter; 7-Third back pressure check valve; 8-Throttle valve; 9-Hydraulic control check valve. Detailed Implementation

[0063] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0064] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0065] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0066] The present invention will be further explained below with reference to specific embodiments.

[0067] It should also be noted that the specific embodiments or implementation methods described below are a series of optimized settings listed by this utility model to further explain the specific utility model content, and these settings can be combined or used in conjunction with each other.

[0068] Example 1

[0069] like Figure 1 As shown, this embodiment provides a chain lubrication system with quantitative oil output, comprising: a first oil passage, a piston cylinder 2, a lubricating oil tank 3, a lubricating oil passage, an air intake passage, and a second back pressure check valve 5; one end of the first oil passage is connected to the first chamber of the piston cylinder 2, used to supply hydraulic oil to the first chamber of the piston cylinder 2 or to discharge hydraulic oil from the first chamber of the piston cylinder 2; the second chamber of the piston cylinder 2 is connected to the lubricating oil tank 3, used to discharge gas from the second chamber through the piston cylinder 2 to supply gas to the lubricating oil tank 3; one end of the lubricating oil passage is connected to the outlet of the lubricating oil tank 3, and the other end is configured as a chain lubrication outlet, which is located above the chain, for the lubricating oil in the lubricating oil tank 3 to be discharged from the chain lubrication outlet through the lubricating oil passage and flow onto the chain to lubricate the chain; wherein, the lubricating oil can be machine oil or waste hydraulic oil, which has a low cost;

[0070] One end of the intake passage is connected to the second chamber of the piston cylinder 2, and the other end is connected to the atmosphere, for the second chamber of the piston cylinder 2 to draw in air; a second back pressure one-way valve 5 is provided on the intake passage, the inlet of the second back pressure one-way valve 5 is connected to the other end of the intake passage, and the outlet of the second back pressure one-way valve 5 is connected to the second chamber of the piston cylinder 2, for gas to flow unidirectionally from the intake passage to the second chamber of the piston cylinder 2, preventing gas and / or lubricating oil from being discharged from the intake passage, and when the piston cylinder 2 is stationary, air cannot flow into the second chamber of the piston cylinder 2 from the intake passage through the second back pressure one-way valve 5;

[0071] During chain lubrication, hydraulic oil flows from the first oil passage into the first chamber of the piston cylinder 2, pushing the piston in the second chamber of the piston cylinder 2 and forcing the gas in the second chamber of the piston cylinder 2 to be discharged until the space in the second chamber of the piston cylinder 2 is compressed to a minimum by the piston. Since the gas discharged from the second chamber of the piston cylinder 2 cannot be discharged from the suction passage through the second back pressure check valve 5, the gas flows into the lubricating oil tank 3 from the first passage. After the gas flows into the lubricating oil tank 3 from the first passage, the gas in the lubricating oil tank 3 increases, and the gas pressure in the lubricating oil tank 3 is greater than the external gas pressure, forcing a certain amount of lubricating oil in the lubricating oil tank 3 to be discharged from the outlet of the lubricating oil tank 3. The total amount of lubricating oil discharged from the lubricating oil tank 3 is determined by the total amount of air discharged from the second chamber of the piston cylinder 2. After the certain amount of lubricating oil is discharged from the outlet of the lubricating oil tank 3, it is discharged from the chain lubrication outlet through the lubricating oil passage and flows onto the chain to lubricate the chain.

[0072] After lubricating the chain, the piston inside the piston cylinder 2 is pushed into the second chamber of the piston cylinder 2 by the piston's own weight or under the action of external force, forcing the hydraulic oil in the first chamber of the piston cylinder 2 to be discharged from the first oil passage until the space of the first chamber of the piston cylinder 2 is compressed to the minimum by the piston; at the same time, the second chamber of the piston cylinder 2 draws in air from the intake passage, and the air flows into the second chamber of the piston cylinder 2 through the second back pressure check valve 5.

[0073] This application connects the first oil circuit, piston cylinder 2, first passage, lubricating oil tank 3 and lubricating oil circuit in sequence. The piston cylinder 2 supplies air to the lubricating oil tank 3, forcing the lubricating oil tank 3 to discharge a certain amount of lubricating oil to lubricate the chain. Since there is no need to waste hydraulic oil in the excavator's hydraulic system, the cost of chain lubrication is greatly reduced.

[0074] Based on the above technical solution, and further preferably, the quantitative oil-discharging chain lubrication system further includes a hydraulic motor 1, an oil supply circuit, and a return oil circuit; one end of the oil supply circuit is connected to the oil inlet of the hydraulic motor 1 for supplying hydraulic oil to the hydraulic motor 1; one end of the return oil circuit is connected to the oil return port of the hydraulic motor 1 for returning hydraulic oil from the hydraulic motor 1; the hydraulic motor 1 is used to drive the chain to rotate; the other end of the first oil circuit can be selectively connected to the oil supply circuit, the oil drain port of the hydraulic motor 1, or the return oil circuit. When the hydraulic motor 1 is running, hydraulic oil is supplied from the first oil circuit to the first chamber of the piston cylinder 2, thereby realizing that while the hydraulic motor 1 drives the chain to rotate, a quantitative amount of lubricating oil in the lubrication tank 3 is discharged from the outlet of the lubrication tank 3 to lubricate the chain. In this embodiment, the other end of the first oil circuit is connected to the return oil circuit.

[0075] More preferably, the chain lubrication system with metered oil output further includes a hydraulic oil source, and the other end of the oil supply circuit is connected to the hydraulic oil source, so that the hydraulic oil from the hydraulic oil source flows into the oil supply circuit.

[0076] In this embodiment, the chain lubrication system with quantitative oil output also includes a return oil tank. The other end of the return oil circuit is connected to the return oil tank, so that hydraulic oil can flow back from the return oil circuit into the return oil tank.

[0077] Furthermore, a first back pressure check valve 4 is provided on the return oil line. The oil inlet of the first back pressure check valve 4 is connected to the return oil port of the hydraulic motor 1, and the oil outlet of the first back pressure check valve 4 is connected to the return oil tank, so that hydraulic oil can flow unidirectionally from the return oil line to the return oil tank.

[0078] When the other end of the first oil circuit is connected to the return oil circuit, the other end of the first oil circuit is connected between the hydraulic motor 1 and the first back pressure check valve 4. The hydraulic oil flowing out of the return oil port of the hydraulic motor 1 flows to the first back pressure check valve 4. The first back pressure check valve 4 generates back pressure, forcing the hydraulic oil to flow from the first oil circuit into the first chamber of the piston cylinder 2.

[0079] More preferably, a filter 6 is also provided on the air intake passage. The filter 6 is located on the inlet side of the second back pressure check valve 5 and is used to filter impurities in the air.

[0080] In this embodiment, the chain lubrication system with quantitative oil dispensing further includes a first passage. One end of the first passage is connected to the second chamber, and the other end is connected to the inlet of the lubricating oil tank 3. The second chamber of the piston cylinder 2 is connected to the lubricating oil tank 3 through the first passage for discharging air from the second chamber of the piston cylinder 2 and supplying air to the lubricating oil tank 3.

[0081] Furthermore, a third back pressure check valve 7 is provided on the first passage. The inlet of the third back pressure check valve 7 is connected to the second chamber of the piston cylinder 2, and the outlet of the third back pressure check valve 7 is connected to the inlet of the lubricating oil tank 3. This is used to allow gas to flow unidirectionally from the first passage into the lubricating oil tank 3, preventing gas and / or lubricating oil from flowing from the first passage into the second chamber of the piston cylinder 2. When air is drawn into the second chamber of the piston cylinder 2, the gas and / or lubricating oil in the lubricating oil tank 3 cannot flow into the second chamber of the piston cylinder 2 from the first passage through the third back pressure check valve 7.

[0082] More preferably, a throttle valve 8 is provided on the lubrication oil circuit to adjust the flow rate of the lubrication oil circuit, thereby adjusting the oil discharge speed of the chain lubrication outlet.

[0083] Furthermore, the piston cylinder 2 is a single-acting piston cylinder 2 that pushes the piston into the second chamber of the piston cylinder 2 by hydraulic oil, and the piston can be reset by its own weight or by external force.

[0084] This invention enables the hydraulic motor 1 to drive the chain to rotate while simultaneously supplying air to the lubricating oil tank 3 via the piston cylinder 2, forcing the lubricating oil tank 3 to discharge a fixed amount of lubricating oil to lubricate the chain. This eliminates the need to waste hydraulic oil in the excavator's hydraulic system, significantly reducing the cost of chain lubrication.

[0085] Example 2

[0086] This embodiment is basically the same as embodiment 1, except that:

[0087] like Figure 2 As shown in the figure, the chain lubrication system with quantitative oil dispensing provided in this embodiment further includes a hydraulically controlled check valve 9 and a control oil circuit. The hydraulically controlled check valve 9 is disposed on the lubrication oil circuit. The oil outlet of the hydraulically controlled check valve 9 is connected to the outlet of the lubrication oil tank 3, and the oil inlet of the hydraulically controlled check valve 9 is connected to the chain lubrication oil outlet. The control oil port of the hydraulically controlled check valve 9 is connected to the oil supply circuit or the oil return circuit through the control oil circuit, and is used to control the on / off of the lubrication oil circuit through the hydraulically controlled check valve 9. When hydraulic oil is supplied to the hydraulic motor 1 (i.e., hydraulic oil flows from the oil supply line to the oil inlet of the hydraulic motor 1) or when hydraulic oil returns to the hydraulic motor 1 (i.e., hydraulic oil is discharged from the oil return port of the hydraulic motor 1), the outlet of the hydraulic control check valve 9 is connected to the inlet, and the lubricating oil is discharged from the chain lubrication outlet through the lubrication line. When the hydraulic oil does not flow or flows in reverse in the oil supply line or the oil return line, the lubricating oil cannot flow through the hydraulic control check valve 9.

[0088] In this embodiment, the control port of the hydraulic check valve 9 is connected to the oil supply circuit through the control oil circuit.

[0089] When hydraulic oil is supplied to the hydraulic motor 1, the hydraulic oil flows from the control oil circuit through the oil supply circuit to the control port of the hydraulic control check valve 9. The control port of the hydraulic control check valve 9 receives a pressure signal and controls the oil outlet and oil inlet of the hydraulic control check valve 9 to connect. The hydraulic control check valve 9 opens, thereby ensuring that when the hydraulic motor 1 drives the chain to rotate, a certain amount of lubricating oil discharged from the lubricating oil tank 3 can flow through the hydraulic control check valve 9 and be discharged from the chain lubrication outlet through the lubrication oil circuit to lubricate the chain.

[0090] Example 3

[0091] This embodiment is basically the same as embodiment 1, except that:

[0092] like Figure 3-4 As shown in the figure, this embodiment provides a chain lubrication system with quantitative oil dispensing. The second chamber 22 of the piston cylinder 2 is provided with a tube 24 on the side opposite to the first chamber 21. The tube 24 is connected to the lubricating oil tank 3. The piston 23 of the piston cylinder 2 is provided with a push rod 25 on the end face opposite to the first chamber 21. The push rod 25 is slidably disposed in the tube 24 and is used to support the push rod 25 through the tube 24 to prevent the piston 23 from tilting during sliding and causing wear on the cylinder wall of the piston cylinder 2.

[0093] Furthermore, an air intake port 221 is provided on the cylinder wall of the piston cylinder 2, the air intake port 221 is connected to the second chamber 22 of the piston cylinder 2, and one end of the air intake passage is connected to the air intake port 221.

[0094] More preferably, the air intake 221 is disposed on the wall of the tube body 24; when air is drawn into the second chamber 22 of the piston cylinder 2, the air flows into the tube body 24 and into the second chamber 22 from the gap between the tube body 24 and the push rod 25.

[0095] In this embodiment, the second back pressure check valve 5 is detachably installed on the air intake 221 on the pipe wall of the pipe body 24; the filter 6 is installed at the inlet of the second back pressure check valve 5.

[0096] More preferably, a compression spring 26 is provided in the second chamber 22 of the piston cylinder 2, and the compression spring 26 is sleeved on the push rod 25; the compression spring 26 is located between the tube body 24 and the piston 23, one end of the compression spring 26 abuts against the tube body 24, and the other end abuts against the piston 23, and is used to push the piston 23 towards the first chamber 21 of the piston cylinder 2 by the elastic force of the compression spring 26, thereby forcing the hydraulic oil in the first chamber 21 of the piston cylinder 2 to be discharged.

[0097] Example 4

[0098] This embodiment is basically the same as embodiment 1, except that:

[0099] like Figure 5-9 As shown ( Figure 7-9(The red dashed line represents the lubricating oil level). This embodiment provides a chain lubrication system with quantitative oil dispensing. The lubricating oil tank 3 is provided with a first partition 31, which divides the lubricating oil tank 3 into an air inlet chamber 33 and an oil outlet chamber 35 from top to bottom. The inlet 301 of the lubricating oil tank 3 is connected to the air inlet chamber 33. The outlet 302 of the lubricating oil tank 3 is connected to the oil outlet chamber 35. A first through hole 311 is provided at the first corner of the first partition 31, and the air inlet chamber 33 and the oil outlet chamber 35 are connected through the first through hole 311, so that the lubricating oil and gas in the lubricating oil tank 3 can flow between the air inlet chamber 33 and the oil outlet chamber 35.

[0100] During use, the lubricating oil tank 3 is not tilted or tilted in any direction away from the first through hole 311. When the level of the lubricating oil in the oil outlet chamber 35 is higher than the outlet 302 of the lubricating oil tank 3, air is supplied to the lubricating oil tank 3 through the piston cylinder 2, and the lubricating oil can be discharged from the outlet 302 of the lubricating oil tank 3, thereby using the lubricating oil to lubricate the chain.

[0101] In this embodiment, the four side walls of the lubricating oil tank 3 are perpendicular to the adjacent tank walls. When the excavator head changing device is operating normally, the lubricating oil tank 3 may tilt along the length or width direction of the lubricating oil tank 3 along with the excavator head changing device.

[0102] More preferably, the outlet 302 of the lubricating oil tank 3 is located at the bottom center of the lubricating oil tank 3.

[0103] In this embodiment, the maximum tilting angle at which the lubricating oil tank 3 can dispense oil when tilted along its length away from the first through hole 311 is 145°, and the maximum tilting angle at which the lubricating oil tank 3 can dispense oil when tilted along its width away from the first through hole 311 is 120°. When the lubricating oil tank 3 is tilted along its length or width without exceeding the maximum tilting angle, the level of the lubricating oil in the oil outlet chamber 35 is higher than the outlet 302 of the lubricating oil tank 3, and the lubricating oil can be discharged from the outlet 302 of the lubricating oil tank 3, thereby lubricating the chain.

[0104] Example 5

[0105] This embodiment is basically the same as embodiment 4, except that:

[0106] like Figure 10-12 As shown ( Figure 11-12(The red dashed line in the middle represents the lubricating oil level). This embodiment provides a chain lubrication system with quantitative oil dispensing. The lubricating oil tank 3 is further provided with a second partition 32, which is located below the first partition 31. The lubricating oil tank 3 is divided from top to bottom by the first partition 31 and the second partition 32 into an air inlet chamber 33, an intermediate chamber 34, and an oil outlet chamber 35. The second partition 32 is provided with a second through hole 321 at the first corner. The air inlet chamber 33, the intermediate chamber 34, and the oil outlet chamber 35 are connected sequentially through the first through hole 311 and the second through hole 321, so that the lubricating oil and gas in the lubricating oil tank 3 can flow between the air inlet chamber 33, the intermediate chamber 34, and the oil outlet chamber 35.

[0107] During use, when the lubricating oil tank 3 is not tilted or tilted in any direction, and the level of the lubricating oil in the oil outlet chamber 35 is higher than the outlet 302 of the lubricating oil tank 3, air is supplied to the lubricating oil tank 3 through the piston cylinder 2, and the lubricating oil can be discharged from the outlet 302 of the lubricating oil tank 3, thereby using the lubricating oil to lubricate the excavator chain.

[0108] In this embodiment, the maximum tilting angle at which the lubricating oil tank 3 can dispense oil when tilted to both sides along its length is 145°, and the maximum tilting angle at which the lubricating oil tank 3 can dispense oil when tilted to both sides along its width is 120°. When the lubricating oil tank 3 is tilted to the maximum tilting angle along its length or width, the level of the lubricating oil in the oil outlet chamber 35 is higher than the outlet 302 of the lubricating oil tank 3, and the lubricating oil can be discharged from the outlet 302 of the lubricating oil tank 3, thereby lubricating the chain.

[0109] In one feasible implementation, a level gauge is provided on the outside of the lubricating oil tank 3. The lowest liquid level height of the level gauge is the same as the height of the first partition 31, and it is used to detect the liquid level height of the lubricating oil in the lubricating oil tank 3.

[0110] Example 6

[0111] This embodiment is basically the same as embodiment 5, except that:

[0112] like Figure 13 As shown, this embodiment provides a chain lubrication system with quantitative oil dispensing. The piston cylinder 2 (not shown) is located at the top of the air inlet chamber 33 of the lubricating oil tank 3, above the first partition 31. The oil port 211 of the first chamber of the piston cylinder 2 is located on the tank wall of the lubricating oil tank 3, and one end of the first oil passage is connected to the first chamber of the piston cylinder 2 through the oil port 211.

[0113] Furthermore, the second chamber of the piston cylinder 2 is connected to the lubricating oil tank 3, and one end of the suction passage is connected to the inlet 301 of the lubricating oil tank 3, thereby the suction passage is connected to the lubricating oil tank 3 and the second chamber of the piston cylinder 2.

[0114] In this embodiment, the inlet 301 of the lubricating oil tank 3 is the filling port of the lubricating oil tank 3, and the oil tank cover 303 is detachably installed on the filling port.

[0115] More preferably, the oil tank cover 303 is provided with a through hole, and the second back pressure check valve 5 is detachably installed on the through hole; the filter 6 is installed at the inlet of the second back pressure check valve 5.

[0116] Additionally, the tank cover 303 is provided with a hole cover, which is detachably installed on the through hole and is used to seal the through hole when the second back pressure check valve 5 is not installed.

[0117] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A chain lubrication system for metered oil dispensing, characterized in that, include: First oil circuit, piston cylinder, lubricating oil tank, lubricating oil circuit, intake passage and second back pressure check valve; One end of the first oil passage is connected to the first chamber of the piston cylinder, and is used to supply hydraulic oil to the first chamber of the piston cylinder or to discharge hydraulic oil from the first chamber of the piston cylinder; The second chamber of the piston cylinder is connected to the lubricating oil tank and is used to discharge the gas in the second chamber through the piston cylinder to supply gas into the lubricating oil tank. One end of the lubricating oil circuit is connected to the outlet of the lubricating oil tank, and the other end is set as the chain lubrication oil outlet. The chain lubrication oil outlet is located above the chain, so that the lubricating oil in the lubricating oil tank can be discharged from the chain lubrication oil outlet through the lubricating oil circuit and flow onto the chain to lubricate the chain. One end of the air intake passage is connected to the second chamber of the piston cylinder, and the other end is connected to the atmosphere, for the second chamber of the piston cylinder to draw in air; A second back pressure check valve is provided on the intake passage. The inlet of the second back pressure check valve is connected to the other end of the intake passage, and the outlet of the second back pressure check valve is connected to the second chamber of the piston cylinder. This is used to allow gas to flow unidirectionally from the intake passage to the second chamber of the piston cylinder, preventing gas and / or lubricating oil from being discharged from the intake passage.

2. The chain lubrication system with quantitative oil dispensing according to claim 1, characterized in that, It also includes a hydraulic motor, oil supply circuit, and oil return circuit; One end of the oil supply circuit is connected to the oil inlet of the hydraulic motor, and is used to supply hydraulic oil into the hydraulic motor. One end of the return oil circuit is connected to the return oil port of the hydraulic motor, and is used for the return of hydraulic oil in the hydraulic motor. The hydraulic motor is used to drive the chain to rotate; The other end of the first oil circuit is connected to the oil supply circuit, the drain port of the hydraulic motor, or the oil return circuit.

3. The chain lubrication system with quantitative oil dispensing according to claim 2, characterized in that, The chain lubrication system with quantitative oil output also includes a return oil tank. A first back pressure check valve is provided on the return oil line for hydraulic oil to flow unidirectionally from the return oil line to the return oil tank.

4. The chain lubrication system with quantitative oil dispensing according to claim 1, characterized in that, A filter is also provided in the air intake passage. The filter is located on the inlet side of the second back pressure check valve and is used to filter impurities in the air.

5. The chain lubrication system with quantitative oil dispensing according to claim 1, characterized in that, The second chamber of the piston cylinder has a tube on the side opposite to the first chamber, and the tube is connected to the lubricating oil tank. The piston of the piston cylinder has a push rod on the end face opposite to the first chamber. The push rod is slidably disposed in the tube body and is used to support the push rod through the tube body to prevent the piston from tilting during sliding.

6. The chain lubrication system with quantitative oil dispensing according to claim 5, characterized in that, The piston cylinder has an air intake port on its cylinder wall, which is connected to the second chamber of the piston cylinder. One end of the air intake passage is connected to the air intake port.

7. The chain lubrication system with quantitative oil dispensing according to claim 6, characterized in that, The air intake is located on the wall of the tube.

8. The chain lubrication system with quantitative oil dispensing according to claim 5, characterized in that, A compression spring is provided in the second chamber of the piston cylinder, and the compression spring is sleeved on the push rod; The compression spring is disposed between the tube and the piston. One end of the compression spring abuts against the tube and the other end abuts against the piston. It is used to push the piston into the first chamber of the piston cylinder by the elastic force of the compression spring, thereby forcing the hydraulic oil in the first chamber of the piston cylinder to be discharged.

9. The chain lubrication system with quantitative oil dispensing according to claim 1, characterized in that, It also includes a first passage, one end of which is connected to the second cavity and the other end of which is connected to the inlet of the lubricating oil tank, for discharging air from the second cavity of the piston cylinder and supplying air to the lubricating oil tank.

10. The chain lubrication system for quantitative oil dispensing according to claim 9, characterized in that, A third back pressure check valve is provided on the first passage. The inlet of the third back pressure check valve is connected to the second chamber of the piston cylinder, and the outlet of the third back pressure check valve is connected to the inlet of the lubricating oil tank. It is used to allow gas to flow unidirectionally from the first passage to the lubricating oil tank and to prevent gas and / or lubricating oil from flowing from the first passage to the second chamber of the piston cylinder.

11. The chain lubrication system for quantitative oil dispensing according to claim 1, characterized in that, The piston cylinder is located at the top inside the lubricating oil tank, and the oil port of the first chamber of the piston cylinder is located on the tank wall of the lubricating oil tank. One end of the first oil passage is connected to the first chamber of the piston cylinder through the oil port. One end of the air intake passage is connected to the inlet of the lubricating oil tank.

12. The chain lubrication system with quantitative oil dispensing according to claim 1, characterized in that, The lubricating oil tank is provided with a first partition, which divides the lubricating oil tank into an air inlet chamber and an oil outlet chamber from top to bottom. The inlet of the lubricating oil tank is connected to the air intake chamber; The outlet of the lubricating oil tank is connected to the oil outlet chamber; The first partition has a first through hole at its first corner. The air inlet chamber and the oil outlet chamber are connected through the first through hole, so that the lubricating oil and gas in the lubricating oil tank can flow between the air inlet chamber and the oil outlet chamber.

13. The chain lubrication system with quantitative oil dispensing according to claim 12, characterized in that, The lubricating oil tank is also provided with a second partition, which is located below the first partition. The lubricating oil tank is divided from top to bottom into an air inlet chamber, an intermediate chamber, and an oil outlet chamber by the first partition and the second partition. The second partition has a second through hole at the opposite corner of the first corner. The air inlet chamber, the intermediate chamber and the oil outlet chamber are connected in sequence through the first through hole and the second through hole, so that the lubricating oil and gas in the lubricating oil tank can flow between the air inlet chamber, the intermediate chamber and the oil outlet chamber.

14. The chain lubrication system with quantitative oil dispensing according to claim 1, characterized in that, A throttle valve is installed in the lubrication oil circuit to regulate the flow rate of the lubrication oil.

15. The chain lubrication system with quantitative oil dispensing according to claim 2, characterized in that, It also includes a hydraulically controlled check valve and a control oil circuit; the hydraulically controlled check valve is disposed on the lubrication oil circuit, the oil outlet of the hydraulically controlled check valve is connected to the outlet of the lubrication oil tank, the oil inlet of the hydraulically controlled check valve is connected to the chain lubrication oil outlet, and the control oil port of the hydraulically controlled check valve is connected to the oil supply circuit or the oil return circuit through the control oil circuit, for controlling the opening and closing of the lubrication oil circuit through the hydraulically controlled check valve. When hydraulic oil is supplied to the hydraulic motor or hydraulic oil is returned from the hydraulic motor, the oil outlet of the hydraulically controlled check valve is connected to the oil inlet, and the lubrication oil is discharged from the chain lubrication oil outlet through the lubrication oil circuit. When the hydraulic oil does not flow or flows in reverse in the oil supply circuit or the oil return circuit, the lubrication oil cannot flow through the hydraulically controlled check valve.

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