Linkage control system for chain lubricating oil and hydraulic motor oil drainage

Abstract

The invention provides a chain lubricating oil and hydraulic motor oil drainage linkage control system, and relates to the technical field of excavator hydraulic systems. The system comprises a hydraulic motor, a first oil way, a piston cylinder, a first passage, a lubricating oil tank, a lubricating oil way, an air suction passage, a second backpressure one-way valve, a hydraulic control one-way valve, a control oil way, a first oil drainage way, a first one-way valve, a second oil drainage way, a second one-way valve and a third one-way valve. According to the linkage control system for chain lubricating oil and hydraulic motor oil drainage, by arranging the matching relation among all valves, passages and oil ways, when the hydraulic motor drives the chain to rotate, oil is discharged at constant pressure through the lubricating oil tank or discharged through the interior of the hydraulic motor shell in a switchable mode, and the oil is discharged out of the chain lubricating oil outlet to lubricate the chain; excessive waste of hydraulic oil in a hydraulic system of the excavator is reduced, and the cost of chain lubricating oil is greatly reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of hydraulic systems for excavators, and in particular to a chain lubrication and hydraulic motor oil drain linkage control system. Background Art

[0002] Currently, excavators typically use hydraulic systems to transmit power and control the excavator head exchange mechanism to perform various actions. An excavator's hydraulic system is a combination of various hydraulic components organically connected by pipelines, tailored to the transmission requirements of the excavator head exchange mechanism and its various mechanisms. The hydraulic motor is the actuator of the excavator's hydraulic system, converting the pressure energy of the hydraulic oil within the hydraulic system into mechanical energy to drive the chain of the excavator head exchange mechanism, which in turn drives the excavator head exchange mechanism to perform various actions. As the primary transmission component of the excavator head exchange mechanism, the chain is subject to wear and rust from frequent use. Therefore, to prevent the chain from jamming, blocking, or even breaking during rotation, it is typically lubricated during chain rotation to ensure normal chain rotation.

[0003] In existing technology, chain lubrication typically utilizes the hydraulic oil within the hydraulic motor housing to lubricate the chain. When the hydraulic motor drives the chain to rotate, the hydraulic oil within the hydraulic motor housing is drawn out through the hydraulic motor's oil drain port and directed through a hydraulic pipeline to the chain, thereby lubricating the chain. However, this method continuously consumes the hydraulic oil in the excavator's hydraulic system. Excessive hydraulic oil consumption can cause the system to malfunction. Furthermore, the high cost of hydraulic oil makes it unsuitable to waste excessive amounts of hydraulic oil to lubricate the chain. Summary of the Invention

[0004] The object of the present invention is to provide a chain lubrication and hydraulic motor oil drain linkage control system to solve at least one of the above-mentioned technical problems existing in the prior art.

[0005] To solve the above technical problems, the present invention provides a chain lubrication and hydraulic motor oil drain linkage control system, comprising: a hydraulic motor, a first oil circuit, a piston cylinder, a first passage, a lubricating oil tank, a lubricating oil circuit, an air intake passage, a second back pressure check valve, a hydraulically controlled check valve, a control oil circuit, a first oil drain circuit, a first check valve, a second oil drain circuit, a second check valve, and a third check valve;

[0006] The hydraulic motor is used to drive the chain to rotate;

[0007] One end of the first oil circuit is in communication with the first chamber of the piston cylinder, and the other end is in communication with the oil return port of the hydraulic motor, and is used for supplying the hydraulic oil in the hydraulic motor from the first oil circuit to the first chamber of the piston cylinder or for discharging the hydraulic oil in the first chamber of the piston cylinder;

[0008] One end of the first passage is in communication with the second chamber of the piston cylinder, and the other end is in communication with the inlet of the lubricating oil tank, for discharging gas in the second chamber of the piston cylinder and supplying gas to the lubricating oil tank;

[0009] One end of the lubricating oil circuit is connected to the outlet of the lubricating oil tank, and the other end is provided as a chain lubricating oil outlet. The chain lubricating oil outlet is provided above the chain and is used for the lubricating oil in the lubricating oil tank to be discharged from the chain lubricating oil outlet through the lubricating oil circuit and flow to the chain to lubricate the chain.

[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, so that the second chamber of the piston cylinder can inhale air;

[0011] The air intake passage is provided with a second back-pressure one-way valve, the inlet of the second back-pressure one-way valve being connected to the other end of the air intake passage, and the outlet of the second back-pressure one-way valve being connected to the second chamber of the piston cylinder, so as to allow gas to flow from the air intake passage into the second chamber of the piston cylinder in one direction and prevent gas from being discharged from the air intake passage;

[0012] The hydraulically controlled one-way valve is arranged on the lubricating oil circuit, the oil outlet of the hydraulically controlled one-way valve is communicated with the outlet of the lubricating oil tank, the oil inlet of the hydraulically controlled one-way valve is communicated with the chain lubricating oil outlet, the control oil port of the hydraulically controlled one-way valve is communicated with the first oil circuit through the control oil circuit, and is used to control the on-off of the lubricating oil circuit through the hydraulically controlled one-way valve; when the hydraulic oil flows in the first oil circuit in the forward direction, the oil outlet of the hydraulically controlled one-way valve is communicated with the oil inlet, and the lubricating oil is discharged from the chain lubricating oil outlet through the lubricating oil circuit; and when the hydraulic oil flows in the reverse direction or does not flow in the first oil circuit, the lubricating oil cannot flow through the hydraulically controlled one-way valve;

[0013] One end of the first oil drain circuit is connected to the oil drain port of the hydraulic motor, and the other end is connected to the oil outlet of the hydraulically controlled one-way valve, so that the hydraulic oil in the housing of the hydraulic motor is discharged from the first oil drain circuit into the lubricating oil circuit, and is discharged from the chain lubricating oil outlet through the lubricating oil circuit to flow to the chain to lubricate the chain;

[0014] The first one-way valve is arranged on the first oil drain line, the oil inlet of the first one-way valve is communicated with the oil drain port of the hydraulic motor, and the oil outlet of the first one-way valve is communicated with the oil outlet of the hydraulically controlled one-way valve, and is used to prevent the lubricating oil from flowing back into the hydraulic motor from the first oil drain line when the lubricating oil tank is drained;

[0015] One end of the second oil drain circuit is connected to the oil drain port of the hydraulic motor, and the other end is connected to the first oil circuit, so as to be used for draining the hydraulic oil in the hydraulic motor housing from the first oil circuit through the second oil drain circuit when the hydraulic motor stops rotating;

[0016] The second one-way valve is provided on the second oil drain line, the oil inlet of the second one-way valve is communicated with the oil drain port of the hydraulic motor, and the oil outlet of the second one-way valve is communicated with the first oil line, and is used to prevent the hydraulic oil from reversely flowing from the second oil drain line into the hydraulic motor when the hydraulic oil is supplied to the first chamber of the piston cylinder or when the hydraulic oil in the first chamber of the piston cylinder is discharged;

[0017] The third one-way valve is arranged on the lubricating oil circuit, the oil inlet of the third one-way valve is connected to the outlet of the lubricating oil tank, and the oil outlet of the third one-way valve is connected to the oil outlet of the hydraulic control one-way valve, and is used to prevent the hydraulic oil from flowing back from the lubricating oil circuit to the lubricating oil tank when the hydraulic motor housing leaks oil.

[0018] As a further improvement of the present invention, the hydraulically controlled one-way valve is arranged on the first oil drain oil circuit, the oil outlet of the hydraulically controlled one-way valve is communicated with the oil drain port of the hydraulic motor, and the oil inlet of the hydraulically controlled one-way valve is communicated with the lubricating oil circuit, and is used to control the on-off of the first oil drain oil circuit through the hydraulically controlled one-way valve. When the hydraulic oil flows in the first oil circuit in a forward direction, the oil outlet of the hydraulically controlled one-way valve is communicated with the oil inlet, and the hydraulic oil in the hydraulic motor housing is leaked from the first oil drain oil circuit into the lubricating oil circuit, and is discharged from the chain lubricating oil outlet through the lubricating oil circuit, and flows to the chain to lubricate the chain;

[0019] The third one-way valve is not provided on the lubricating oil circuit.

[0020] As a further improvement of the present invention, it further includes a first stop valve, which is arranged on the first oil leakage line and is used to adjust the on-off of the first oil leakage line.

[0021] As a further improvement of the present invention, the first one-way valve is not provided on the first oil drain line, and the first shut-off valve is provided between the oil drain port of the hydraulic motor and the oil outlet of the hydraulically controlled one-way valve.

[0022] As a further improvement of the present invention, it further includes a second stop valve, which is arranged on the first oil circuit and is used to adjust the on-off of the first oil circuit.

[0023] As a further improvement of the present invention, the second shut-off valve is arranged between the first chamber of the piston cylinder and the other end of the second oil drain circuit.

[0024] As a further improvement of the present invention, the pressure reducing valve is provided on the first passage, the inlet of the pressure reducing valve is connected to the second chamber of the piston cylinder, and the outlet of the pressure reducing valve is connected to the inlet of the lubricating oil tank, so as to reduce the gas pressure to a set pressure after the gas flows forward through the pressure reducing valve, and control the gas pressure in the lubricating oil tank to maintain the set pressure.

[0025] As a further improvement of the present invention, a fourth one-way valve is provided on the first passage, and the fourth one-way valve is arranged between the pressure reducing valve and the lubricating oil tank. The inlet of the fourth one-way valve is connected with the outlet of the pressure reducing valve, and the outlet of the fourth one-way valve is connected with the inlet of the lubricating oil tank, which is used for the one-way flow of gas from the first passage to the lubricating oil tank, and prevents the gas and / or lubricating oil from flowing from the first passage to the second chamber of the piston cylinder.

[0026] As a further improvement of the present invention, it also includes an overflow passage and a safety overflow valve;

[0027] One end of the overflow passage is communicated with the first passage and is connected between the pressure reducing valve and the lubricating oil tank;

[0028] The air inlet of the safety relief valve is connected to the other end of the overflow passage, so as to allow the gas to overflow from the air outlet of the safety relief valve through the overflow passage when the outlet pressure of the pressure reducing valve exceeds the maximum gas pressure that the lubricating oil tank can withstand.

[0029] As a further improvement of the present invention, the pressure reducing valve is not provided on the first passage, and the safety overflow valve is used to allow the gas to overflow from the outlet of the safety overflow valve through the overflow passage when the gas pressure in the lubricating oil tank exceeds the set pressure, thereby controlling the gas pressure in the lubricating oil tank to be maintained at the set pressure.

[0030] As a further improvement of the present invention, a third back-pressure one-way valve is provided on the first passage, the inlet of the third back-pressure one-way valve is connected to the second chamber of the piston cylinder, and the outlet of the third back-pressure one-way valve is connected to the inlet of the lubricating oil tank, so as to supply the gas in the second chamber of the piston cylinder to the lubricating oil tank in a one-way manner.

[0031] As a further improvement of the present invention, a fourth one-way valve is provided on the first passage, the inlet of the fourth one-way valve being connected to the second chamber of the piston cylinder, and the outlet of the fourth one-way valve being connected to the inlet of the lubricating oil tank, for one-way supply of gas from the second chamber of the piston cylinder to the lubricating oil tank. As a further improvement of the present invention, an oil supply circuit and an oil return circuit are also included;

[0032] One end of the oil supply passage is connected to the oil inlet of the hydraulic motor and is used to supply hydraulic oil to the hydraulic motor;

[0033] One end of the oil return line is connected to the oil return port of the hydraulic motor and is used for returning the hydraulic oil in the hydraulic motor;

[0034] The other end of the first oil passage is communicated with the oil return passage.

[0035] As a further improvement of the present invention, a first back-pressure one-way valve is provided on the oil return line to enable the hydraulic oil to flow in one direction from the oil return line to the oil return tank.

[0036] As a further improvement of the present invention, a filter is further provided on the air intake passage. The filter is provided on the inlet side of the second back-pressure one-way valve and is used to filter impurities in the air.

[0037] As a further improvement of the present invention, a throttle valve is provided on the lubricating oil circuit for adjusting the flow of the lubricating oil circuit.

[0038] As a further improvement of the present invention, the second chamber of the piston cylinder is provided with a tube on a side away from the first chamber, and the second chamber of the piston cylinder is connected to the first passage through the tube;

[0039] The piston of the piston cylinder is provided with a push rod on the end face of the side away from the first chamber. The push rod is slidably arranged in the tube body and is used to support the push rod through the tube body to prevent the piston from tilting during the sliding process.

[0040] As a further improvement of the present invention, an air intake port is provided on the cylinder wall of the piston cylinder, the air intake port is communicated with the second cavity of the piston cylinder, and one end of the air intake passage is communicated with the air intake port.

[0041] As a further improvement of the present invention, the air intake is arranged on the tube wall of the tube body.

[0042] As a further improvement of the present invention, a compression spring is provided in the second chamber of the piston cylinder, and the compression spring is sleeved on the push rod;

[0043] The compression spring is arranged between the tube body and the piston, with one end of the compression spring abutting against the tube body and the other end abutting against the piston, and is used to use the elastic force of the compression spring to push the piston toward the first chamber of the piston cylinder, forcing the hydraulic oil in the first chamber of the piston cylinder to be discharged.

[0044] As a further improvement of the present invention, a first partition is provided in the lubricating oil tank, and the lubricating oil tank is divided from top to bottom into an air inlet chamber and an oil outlet chamber by the first partition;

[0045] The inlet of the lubricating oil tank is in communication with the air intake cavity;

[0046] The outlet of the lubricating oil tank is communicated with the oil outlet cavity;

[0047] A first through hole is provided at a first corner of the first partition plate, and the air inlet cavity and the oil outlet cavity are communicated with each other through the first through hole, so that the lubricating oil and gas in the lubricating oil tank flow between the air inlet cavity and the oil outlet cavity.

[0048] As a further improvement of the present invention, a second partition is further provided in the lubricating oil tank, and the second partition is provided 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.

[0049] The second partition is provided with a second through hole at the diagonal corner opposite to the first corner, and 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 flow between the air inlet chamber, the intermediate chamber and the oil outlet chamber.

[0050] As a further improvement of the present invention, a liquid level meter is provided on the outside of the lubricating oil tank, and the lowest liquid level height of the liquid level meter is the same as the height of the first partition, and is used to detect the liquid level height of the lubricating oil in the lubricating oil tank.

[0051] By adopting the above technical solution, the present invention has the following beneficial effects:

[0052] The present invention provides a chain lubrication and hydraulic motor oil drain linkage control system, which realizes that when the hydraulic motor drives the chain to rotate, the oil can be switched to be drained at a constant pressure through the lubricating oil tank or drained through the hydraulic motor housing, and discharged from the chain lubrication oil outlet to lubricate the chain, thereby reducing excessive waste of hydraulic oil in the hydraulic system of the excavator and greatly reducing the cost of chain lubrication. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0054] Figure 1 Schematic diagram of the chain lubrication and hydraulic motor oil drain linkage control system provided in Example 1 of the present invention;

[0055] Figure 2 Schematic diagram of the chain lubrication and hydraulic motor oil drain linkage control system provided in Example 4 of the present invention;

[0056] Figure 3 A cross-sectional view of the piston cylinder provided in an embodiment of the present invention when the space in the second chamber is compressed to a minimum;

[0057] Figure 4 for Figure 3 The cross-sectional view of the piston cylinder shown is when the first chamber space is compressed to the minimum;

[0058] Figure 5 A schematic structural diagram of a lubricating oil tank provided in an embodiment of the present invention;

[0059] Figure 6 for Figure 5 Schematic diagram of the internal structure of the lubricating oil tank shown;

[0060] Figure 7 for Figure 5 The internal structure diagram of the lubricating oil tank shown is when it is tilted in a direction away from the first through hole;

[0061] Figure 8 for Figure 5 A front perspective view of the lubricating oil tank shown when it is tilted along the length direction toward the side away from the first through hole;

[0062] Figure 9 for Figure 5 A side perspective view of the lubricating oil tank shown when tilted in the width direction toward a side away from the first through hole;

[0063] Figure 10 A schematic diagram of the internal structure of a lubricating oil tank provided in another embodiment of the present invention;

[0064] Figure 11 for Figure 10 A front perspective view of the lubricating oil tank shown when tilted to both sides along the length direction;

[0065] Figure 12 for Figure 10 A side perspective view of the lubricating oil tank shown tilted to both sides in the width direction.

[0066] Reference numerals:

[0067] 1-Hydraulic motor; 2-Piston cylinder; 21-First chamber; 22-Second chamber; 221-Intake port; 23-Piston; 24-Tube body; 25-Push rod; 26-Compression spring; 3-Lubricating oil tank; 301-Inlet of lubricating oil tank; 302-Outlet of lubricating oil tank; 31-First partition; 311-First through hole; 32-Second partition; 321-Second through hole; 33-Inlet chamber; 34-Intermediate chamber; 35-Oil outlet chamber; 4-First back-pressure one-way valve; 5-Second back-pressure one-way valve; 6-Third back-pressure one-way valve; 7-Filter; 8-Fourth one-way valve; 9-Throttle valve; 10-Hydraulic-controlled one-way valve; 11-Pressure reducing valve; 12-Safety overflow valve; 13-First one-way valve; 14-Third one-way valve; 15-Second one-way valve; 16-First stop valve; 17-Second stop valve. DETAILED DESCRIPTION

[0068] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0069] In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0070] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0071] The present invention will be further explained below with reference to specific embodiments.

[0072] It should also be noted that the following specific embodiments or specific implementations are a series of optimized settings listed in the present invention to further explain the specific content of the invention, and these settings can be combined or used in association with each other.

[0073] Example 1

[0074] like Figure 1 As shown, the present embodiment provides a chain lubrication and hydraulic motor oil drain linkage control system, comprising: a hydraulic motor 1, a first oil circuit, a piston cylinder 2, a first passage, a lubricating oil tank 3, a lubricating oil circuit, an air intake passage, a second back pressure check valve 5, a hydraulically controlled check valve 10, a control oil circuit, a first oil drain circuit, a first check valve 13 and a third check valve 14; the hydraulic motor 1 is used to drive the chain to rotate; one end of the first oil circuit is connected to the first chamber of the piston cylinder 2, and the other end is connected to the return oil port of the hydraulic motor 1, so as to supply hydraulic oil or or the discharge of the hydraulic oil in the first cavity of the piston cylinder 2; one end of the first passage is connected to the second cavity of the piston cylinder 2, and the other end is connected to the inlet of the lubricating oil tank 3, for discharging the gas in the second cavity of the piston cylinder 2 and supplying air to the lubricating oil tank 3; one end of the lubricating oil circuit is connected to the outlet of the lubricating oil tank 3, and the other end is set as a chain lubricating oil outlet, and the chain lubricating oil outlet is set above the chain, for the lubricating oil in the lubricating oil tank 3 to be discharged from the chain lubricating oil outlet through the lubricating oil circuit and flow to the chain to lubricate the chain; wherein the lubricating oil can be engine oil or waste hydraulic oil, which is relatively low in cost.

[0075] 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, so as to be used for the second chamber of the piston cylinder 2 to inhale air; a second back-pressure one-way valve 5 is provided on the intake passage, and 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, so as to be used for the one-way flow of gas from the intake passage to the second chamber of the piston cylinder 2, thereby preventing the gas from being discharged from the intake passage. When the piston cylinder 2 is stationary, the air cannot flow from the intake passage into the second chamber of the piston cylinder 2 through the second back-pressure one-way valve 5.

[0076] The hydraulically controlled one-way valve 10 is arranged on the lubricating oil circuit, the oil outlet of the hydraulically controlled one-way valve 10 is communicated with the outlet of the lubricating oil tank 3, the oil inlet of the hydraulically controlled one-way valve 10 is communicated with the chain lubricating oil outlet, and the control oil port of the hydraulically controlled one-way valve 10 is communicated with the first oil circuit through the control oil circuit, and is used to control the on-off of the lubricating oil circuit through the hydraulically controlled one-way valve 10, and the hydraulic oil flows forward in the first oil circuit (that is, the hydraulic oil flows from the first oil circuit to the first oil circuit of the piston cylinder 2). When the hydraulic oil in the first chamber of the piston cylinder 2 is in the first oil circuit, the oil outlet of the hydraulically controlled one-way valve 10 is connected to the oil inlet, and the lubricating oil is discharged from the chain lubricating oil outlet through the lubricating oil circuit. When the hydraulic oil flows in the reverse direction in the first oil circuit (that is, the hydraulic oil in the first chamber of the piston cylinder 2 is discharged from the first oil circuit) or does not flow, the lubricating oil cannot flow through the hydraulically controlled one-way valve 10; one end of the first oil drain circuit is connected to the oil drain port of the hydraulic motor 1, and the other end is connected to the oil outlet of the hydraulically controlled one-way valve 10, which is used for the hydraulic oil in the housing of the hydraulic motor 1 Hydraulic oil leaks from the first oil drain circuit into the lubricating oil circuit, is discharged from the chain lubrication outlet through the lubricating oil circuit, and flows to the chain to lubricate the chain. A first one-way valve 13 is provided in the first oil drain circuit. The oil inlet of the first one-way valve 13 is connected to the oil drain port of the hydraulic motor 1, and the oil outlet of the first one-way valve 13 is connected to the oil outlet of the hydraulically controlled one-way valve 10. This valve is used to prevent lubricating oil from flowing back from the first oil drain circuit into the hydraulic motor 1 when the lubricating oil tank 3 is drained. During use, the amount of hydraulic oil discharged from the oil drain port of the hydraulic motor 1 is much less than the amount of lubricating oil discharged from the outlet of the lubricating oil tank 3. A third one-way valve 14 is provided in the lubricating oil circuit. The oil inlet of the third one-way valve 14 is connected to the outlet of the lubricating oil tank 3, and the oil outlet of the third one-way valve 14 is connected to the oil outlet of the hydraulically controlled one-way valve 10. This valve is used to prevent hydraulic oil from flowing back from the lubricating oil circuit into the lubricating oil tank 3 when the housing of the hydraulic motor 1 is drained.

[0077] The chain lubrication and hydraulic motor oil drain linkage control system also includes a second oil drain circuit and a second one-way valve 15; one end of the second oil drain circuit is connected to the oil drain port of the hydraulic motor 1, and the other end is connected to the first oil circuit, which is used to drain the hydraulic oil in the housing of the hydraulic motor 1 from the first oil circuit through the second oil drain circuit at the moment when the hydraulic motor 1 stops rotating; the second one-way valve 15 is arranged on the second oil drain circuit, the oil inlet of the second one-way valve 15 is connected to the oil drain port of the hydraulic motor, and the oil outlet of the second one-way valve 15 is connected to the first oil circuit, which is used to prevent the hydraulic oil from flowing back into the hydraulic motor 1 from the second oil drain circuit when supplying hydraulic oil to the first chamber of the piston cylinder 2 or discharging the hydraulic oil in the first chamber of the piston cylinder 2.

[0078] On the basis of the above technical solution, in another optional embodiment, the hydraulically controlled one-way valve 10 is arranged on the first oil drain circuit, the oil outlet of the hydraulically controlled one-way valve 10 is connected to the oil drain port of the hydraulic motor 1, and the oil inlet of the hydraulically controlled one-way valve 10 is connected to the lubricating oil circuit, which is used to control the on-off of the first oil drain circuit through the hydraulically controlled one-way valve 10. When the hydraulic oil flows forward in the first oil circuit, the oil outlet of the hydraulically controlled one-way valve 10 is connected to the oil inlet, and the hydraulic oil in the housing of the hydraulic motor 1 leaks from the first oil drain circuit into the lubricating oil circuit, is discharged from the chain lubricating oil outlet through the lubricating oil circuit, and flows to the chain to lubricate the chain; the third one-way valve 14 is not arranged on the lubricating oil circuit.

[0079] In this embodiment, the chain lubrication and hydraulic motor oil drain linkage control system also includes a first stop valve 16, which is arranged on the first oil drain oil circuit, between the oil outlet of the first one-way valve 13 and the oil outlet of the hydraulically controlled one-way valve 10, and is used to adjust the on-off of the first oil drain oil circuit.

[0080] In a feasible implementation, the first one-way valve 13 is not provided on the first oil drain line, and the first shut-off valve 16 is provided between the oil drain port of the hydraulic motor 1 and the oil outlet of the hydraulically controlled one-way valve 10 .

[0081] More preferably, the chain lubrication and hydraulic motor oil drain linkage control system further includes a second shut-off valve 17 , which is provided on the first oil circuit for regulating the on-off of the first oil circuit.

[0082] In this embodiment, the second shut-off valve 17 is disposed between the first chamber of the piston cylinder 2 and the other end of the second oil drain passage.

[0083] When in use, the first stop valve 16 is closed and the second stop valve 17 is opened, and the hydraulic oil flows from the first oil path into the first chamber of the piston cylinder 2, pushing the piston in the piston cylinder 2 toward the second chamber of the piston cylinder 2, 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 intake path through the second back pressure check valve 5, the gas is reduced from the first path to the set pressure through the pressure reducing valve 11 and then flows into the lubricating oil tank 3, thereby controlling the gas pressure in the lubricating oil tank 3 to be maintained at the set pressure; at the same time, the hydraulic oil flows from the control oil path through the first oil path to the control oil port of the hydraulically controlled one-way valve 10, and the control oil port of the hydraulically controlled one-way valve 10 receives a pressure signal to control the oil outlet of the hydraulically controlled one-way valve 10 to be connected with the oil inlet, and the hydraulically controlled one-way valve 10 is opened; after the gas flows from the first path into the lubricating oil tank 3, the lubricating oil tank 3 As the gas in the oil tank 3 increases, the pressure in the lubricating oil tank 3 becomes greater than the external pressure, forcing the lubricating oil in the lubricating oil tank 3 to be discharged from the outlet of the lubricating oil tank 3 at a constant pressure. 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 being discharged from the outlet of the lubricating oil tank 3 at a constant pressure, the lubricating oil is discharged from the chain lubrication outlet through the lubricating oil passage, flowing to the chain to lubricate the chain. After lubricating the chain, the piston in the piston cylinder 2 is pushed toward the second chamber of the piston cylinder 2 by its own weight or under the action of an 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 in the first chamber of the piston cylinder 2 is compressed to a minimum by the piston. At the same time, the second chamber of the piston cylinder 2 draws 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. When the first shut-off valve 16 is closed, the hydraulic oil in the hydraulic motor housing is discharged from the second drain oil passage.

[0084] When in use, the first stop valve 16 is opened and the second stop valve 17 is closed. The hydraulic oil cannot flow from the first oil circuit through the second stop valve 17 into the piston cylinder 2. The hydraulic oil flows from the control oil circuit to the control oil port of the hydraulically controlled one-way valve 10 via the first oil circuit. The control oil port of the hydraulically controlled one-way valve 10 receives a pressure signal, controls the oil outlet of the hydraulically controlled one-way valve 10 to be connected with the oil inlet, and the hydraulically controlled one-way valve 10 opens; the hydraulic oil in the housing of the hydraulic motor 1 flows from the oil drain port of the hydraulic motor 1 into the first oil drain circuit, is discharged from the chain lubrication oil outlet through the lubricating oil circuit, and flows to the chain to lubricate the chain; at the moment the hydraulic motor 1 stops rotating, the control oil port of the hydraulically controlled one-way valve 10 loses the pressure signal, the hydraulically controlled one-way valve 10 is closed, and the hydraulic oil in the housing of the hydraulic motor 1 is drained from the first oil circuit via the second oil drain circuit.

[0085] Furthermore, the pressure reducing valve 11 is provided on the first passage, the inlet of the pressure reducing valve 11 is communicated with the second chamber of the piston cylinder 2, and the outlet of the pressure reducing valve 11 is communicated with the inlet of the lubricating oil tank 3, so as to reduce the gas pressure to a set pressure after the gas flows through the pressure reducing valve 11 in a forward direction, thereby controlling the gas pressure in the lubricating oil tank 3 to be maintained at the set pressure;

[0086] By arranging a second back-pressure one-way valve 5 on the air intake passage and a hydraulically controlled one-way valve 10 on the lubricating oil passage, the sealing state of the lubricating oil tank 3 is maintained, and then the air pressure in the lubricating oil tank 3 is controlled to be constant by arranging a pressure reducing valve 11 on the first passage, thereby achieving constant-pressure oil discharge from the lubricating oil tank 3, ensuring that the lubricating oil is continuously and stably discharged from the chain lubrication outlet to lubricate the chain. Since there is no need to waste hydraulic oil in the hydraulic system of the excavator, the cost of chain lubrication is greatly reduced.

[0087] In this embodiment, a fourth one-way valve 8 is provided on the first passage, and the fourth one-way valve 8 is arranged between the pressure reducing valve 11 and the lubricating oil tank 3. The inlet of the fourth one-way valve 8 is connected with the outlet of the pressure reducing valve 11, and the outlet of the fourth one-way valve 8 is connected with the inlet of the lubricating oil tank 3, which is used for the one-way flow of gas from the first passage to the lubricating oil tank 3, and prevents the gas and / or lubricating oil from flowing from the first passage to the second chamber of the piston cylinder 2; when the second chamber of the piston cylinder 2 inhales air, the gas and / or lubricating oil in the lubricating oil tank 3 cannot flow from the first passage into the second chamber of the piston cylinder 2 through the fourth one-way valve 8.

[0088] More preferably, the chain lubrication and hydraulic motor oil leakage linkage control system also includes an overflow passage and a safety overflow valve 12; one end of the overflow passage is communicated with the first passage and is connected between the pressure reducing valve 11 and the lubricating oil tank 3; the air inlet of the safety overflow valve 12 is connected to the other end of the overflow passage, and is used for allowing the gas to overflow from the air outlet of the safety overflow valve 12 through the overflow passage when the outlet pressure of the pressure reducing valve 11 exceeds the maximum gas pressure that the lubricating oil tank 3 can withstand, thereby maintaining the gas pressure in the lubricating oil tank 3 stable and protecting the safety of the chain lubrication and hydraulic motor oil leakage linkage control system; if the gas pressure fails to be reduced to the set pressure after the gas flows through the pressure reducing valve 11, the gas pressure is reduced to the set pressure by allowing part of the gas to overflow through the safety overflow valve 12, thereby maintaining the gas pressure in the lubricating oil tank 3 constant.

[0089] Furthermore, the chain lubrication and hydraulic motor oil drain linkage control system also includes an oil supply circuit and an oil return 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 oil return circuit is connected to the oil return port of the hydraulic motor 1, for returning the hydraulic oil in the hydraulic motor 1; the other end of the first oil circuit is connected to the oil return circuit, and 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 constant pressure discharge of the lubricating oil tank 3 while the hydraulic motor 1 drives the chain to rotate, and the lubricating oil is continuously and stably discharged from the chain lubrication outlet to lubricate the chain.

[0090] In this embodiment, the chain lubrication and hydraulic motor oil drain linkage control system 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 of the hydraulic oil source flows into the oil supply circuit.

[0091] Furthermore, the chain lubrication and hydraulic motor oil drain linkage control system also includes a return oil tank, and the other end of the return oil circuit is connected to the return oil tank for the hydraulic oil to flow back from the return oil circuit into the return oil tank.

[0092] More preferably, a first back-pressure one-way valve 4 is provided on the return oil circuit, the oil inlet of the first back-pressure one-way valve 4 is connected with the return oil port of the hydraulic motor 1, and the oil outlet of the first back-pressure one-way valve 4 is connected with the return oil tank, for the one-way flow of hydraulic oil from the return oil circuit to the return oil tank; when the other end of the first oil circuit is connected with the return oil circuit, the other end of the first oil circuit is connected between the hydraulic motor 1 and the first back-pressure one-way valve 4, and the hydraulic oil flowing out of the return oil port of the hydraulic motor 1 flows to the first back-pressure one-way valve 4, and the first back-pressure one-way 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.

[0093] In this embodiment, a filter 7 is further provided on the air intake passage. The filter 7 is provided on the inlet side of the second back-pressure one-way valve 5 and is used to filter impurities in the air.

[0094] More preferably, a throttle valve 9 is provided on the lubricating oil circuit to adjust the flow of the lubricating oil circuit, thereby adjusting the oil discharge speed of the chain lubricating oil outlet.

[0095] Furthermore, the piston cylinder 2 is a single-acting piston cylinder 2 that pushes the piston toward the second chamber of the piston cylinder 2 through hydraulic oil, and the piston can be reset by its own weight or under the action of an external force.

[0096] The present invention realizes that when the hydraulic motor 1 drives the chain to rotate, the oil can be switched to be discharged at a constant pressure through the lubricating oil tank 3 or the oil can be drained through the housing of the hydraulic motor 1, and the oil is discharged from the chain lubrication outlet to lubricate the chain, thereby reducing excessive waste of hydraulic oil in the hydraulic system of the excavator and greatly reducing the cost of chain lubrication.

[0097] Example 2

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

[0099] This embodiment provides a chain lubrication and hydraulic motor oil drain linkage control system, in which the pressure reducing valve 11 is not provided on the first passage, and the safety overflow valve 12 is used to allow the gas to overflow from the outlet of the safety overflow valve 12 through the overflow passage when the gas pressure in the lubricating oil tank 3 exceeds the set pressure, thereby controlling the gas pressure in the lubricating oil tank 3 to be maintained at the set pressure.

[0100] Example 3

[0101] This embodiment is basically the same as embodiment 1, except that:

[0102] This embodiment provides a chain lubrication and hydraulic motor oil leakage linkage control system, in which only a fourth one-way valve 8 is provided on the first passage, and the outlet of the fourth one-way valve 8 is connected to the inlet of the lubricating oil tank 3, which is used for the one-way flow of gas from the first passage to the lubricating oil tank 3, preventing the gas and / or lubricating oil from flowing from the first passage to the second chamber of the piston cylinder 2, so that the exhaust gas volume of the piston cylinder 2 can be effectively controlled by controlling the capacity of the piston cylinder 2, and the gas discharged from the piston cylinder 2 enters the lubricating oil tank 3 through the fourth one-way valve 8, thereby making the amount of lubricating oil discharged from the lubricating oil tank 3 quantitatively controllable; at the same time, when the second chamber of the piston cylinder 2 inhales air, the gas and / or lubricating oil in the lubricating oil tank 3 cannot flow from the first passage into the second chamber of the piston cylinder 2 through the fourth one-way valve 8.

[0103] Example 4

[0104] like Figure 2 As shown, this embodiment is basically the same as embodiment 1, except that:

[0105] The present embodiment provides a chain lubrication and hydraulic motor oil leakage linkage control system, in which no filter 7 is provided on the intake passage, and only a third back-pressure one-way valve 6 is provided on the first passage, and the outlet of the third back-pressure one-way valve 6 is connected to the inlet of the lubricating oil tank 3, for preventing gas from flowing from the first passage into the lubricating oil tank 3 in one direction, and preventing gas and / or lubricating oil from flowing from the first passage into the second chamber of the piston cylinder 2, so that the exhaust gas volume of the piston cylinder 2 can be effectively controlled by controlling the capacity of the piston cylinder 2, and the gas discharged from the piston cylinder 2 enters the lubricating oil tank 3 through the third back-pressure one-way valve 6, thereby making the amount of lubricating oil discharged from the lubricating oil tank 3 quantitatively controllable; at the same time, when the second chamber of the piston cylinder 2 inhales air, the gas and / or lubricating oil in the lubricating oil tank 3 cannot flow from the first passage into the second chamber of the piston cylinder 2 through the third back-pressure one-way valve 6.

[0106] Example 5

[0107] This embodiment is basically the same as embodiment 1, except that:

[0108] like Figure 3-4 As shown, this embodiment provides a chain lubrication and hydraulic motor oil drain linkage control system, the second chamber 22 of the piston cylinder 2 is provided with a tube body 24 on the side away from the first chamber 21, and the second chamber 22 of the piston cylinder 2 is connected to the first passage through the tube body 24; the piston 23 of the piston cylinder 2 is provided with a push rod 25 on the end face on the side away from the first chamber 21, and the push rod 25 is slidably arranged in the tube body 24, for supporting the push rod 25 through the tube body 24 to prevent the piston 23 from tilting during the sliding process and causing wear of the cylinder wall of the piston cylinder 2.

[0109] Furthermore, an air intake port 221 is provided on the cylinder wall of the piston cylinder 2 , the air intake port 221 is communicated with the second chamber 22 of the piston cylinder 2 , and one end of the air intake passage is communicated with the air intake port 221 .

[0110] More preferably, the air intake 221 is provided on the tube wall of the tube body 24 ; when the second chamber 22 of the piston cylinder 2 inhales air, 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 .

[0111] In this embodiment, the second back-pressure one-way valve 5 is detachably mounted on the air inlet 221 on the wall of the tube body 24 ; the filter 7 is mounted at the inlet of the second back-pressure one-way valve 5 .

[0112] 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 provided between the tube body 24 and the piston 23, and one end of the compression spring 26 is against the tube body 24, and the other end is against the piston 23, and is used to use the elastic force of the compression spring 26 to push the piston 23 toward the first chamber 21 of the piston cylinder 2, forcing the hydraulic oil in the first chamber 21 of the piston cylinder 2 to be discharged.

[0113] Example 6

[0114] This embodiment is basically the same as embodiment 1, except that:

[0115] like Figure 5-9 As shown ( Figure 7-9 (The red dotted line in the middle represents the lubricating oil level). This embodiment provides a chain lubrication and hydraulic motor oil drain linkage control system. The lubricating oil tank 3 is provided with a first partition 31. The lubricating oil tank 3 is divided from top to bottom by the first partition 31 into an air inlet chamber 33 and an oil outlet chamber 35. 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 a first corner of the first partition 31. 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.

[0116] During use, the lubricating oil tank 3 does not tilt or tilts in any direction away from the first through hole 311. When the liquid 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, and the chain is lubricated by the lubricating oil.

[0117] In this embodiment, the four side walls of the lubricating oil tank 3 are perpendicular to the adjacent walls; when the excavator head replacement device is operating normally, the lubricating oil tank 3 may usually tilt along the length or width direction of the lubricating oil tank 3 along with the excavator head replacement device.

[0118] More preferably, the outlet 302 of the lubricating oil tank 3 is arranged at the bottom center of the lubricating oil tank 3 .

[0119] In this embodiment, the maximum tilting angle at which the lubricating oil tank 3 can discharge oil when it is tilted along the length direction toward the side away from the first through hole 311 is 145°, and the maximum tilting angle at which the lubricating oil tank 3 can discharge oil when it is tilted along the width direction toward the side away from the first through hole 311 is 120°. When the lubricating oil tank 3 is tilted not exceeding the maximum tilting angle along the length direction or the width direction, the liquid 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 utilizing the lubricating oil to lubricate the chain.

[0120] Example 7

[0121] This embodiment is basically the same as embodiment 6, except that:

[0122] like Figure 10-12 As shown ( Figure 11-12 The red dotted line in the middle represents the lubricating oil level), this embodiment provides a chain lubrication and hydraulic motor oil leakage linkage control system, the lubricating oil tank 3 is further provided with a second partition 32, the second partition 32 is arranged below the first partition 31, the lubricating oil tank 3 is divided from top to bottom into an air inlet chamber 33, an intermediate chamber 34 and an oil outlet chamber 35 by the first partition 31 and the second partition 32; the second partition 32 is provided with a second through hole 321 at the diagonal corner of the first corner, the air inlet chamber 33, the intermediate chamber 34 and the oil outlet chamber 35 are connected in sequence through the first through hole 311 and the second through hole 321, and the lubricating oil and gas in the lubricating oil tank 3 flow between the air inlet chamber 33, the intermediate chamber 34 and the oil outlet chamber 35.

[0123] During use, the lubricating oil tank 3 does not tilt or tilts in any direction. When the liquid 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.

[0124] In this embodiment, the maximum tilting angle at which the lubricating oil tank 3 can discharge oil when tilted toward both sides along the length direction is 145°, and the maximum tilting angle at which the lubricating oil tank 3 can discharge oil when tilted toward both sides along the width direction is 120°. When the lubricating oil tank 3 is tilted not exceeding the maximum tilting angle along the length direction or the width direction, the liquid 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 utilizing the lubricating oil to lubricate the chain.

[0125] In a feasible embodiment, a liquid level meter is provided on the outside of the lubricating oil tank 3 , and the lowest liquid level height of the liquid level meter is the same as the height of the first partition 31 , and is used to detect the liquid level height of the lubricating oil in the lubricating oil tank 3 .

[0126] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A chain lubrication and hydraulic motor oil drain linkage control system, characterized in that: include: A hydraulic motor, a first oil circuit, a piston cylinder, a first passage, a lubricating oil tank, a lubricating oil circuit, an air intake passage, a second back pressure check valve, a hydraulically controlled check valve, a control oil circuit, a first oil drain circuit, a first check valve, a second oil drain circuit, a second check valve, and a third check valve; The hydraulic motor is used to drive the chain to rotate; One end of the first oil circuit is in communication with the first chamber of the piston cylinder, and the other end is in communication with the oil return port of the hydraulic motor, and is used for supplying the hydraulic oil in the hydraulic motor from the first oil circuit to the first chamber of the piston cylinder or for discharging the hydraulic oil in the first chamber of the piston cylinder; One end of the first passage is in communication with the second chamber of the piston cylinder, and the other end is in communication with the inlet of the lubricating oil tank, for discharging gas in the second chamber of the piston cylinder and supplying gas to 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 provided as a chain lubricating oil outlet. The chain lubricating oil outlet is provided above the chain and is used for the lubricating oil in the lubricating oil tank to be discharged from the chain lubricating oil outlet through the lubricating oil circuit and flow to the chain to lubricate the chain. One end of the air intake passage is in communication with the second chamber of the piston cylinder, and the other end is in communication with the atmosphere, so as to be used for the second chamber of the piston cylinder to inhale air; The air intake passage is provided with a second back-pressure one-way valve, the inlet of the second back-pressure one-way valve being connected to the other end of the air intake passage, and the outlet of the second back-pressure one-way valve being connected to the second chamber of the piston cylinder, so as to allow gas to flow from the air intake passage into the second chamber of the piston cylinder in one direction and prevent gas from being discharged from the air intake passage; The hydraulically controlled one-way valve is arranged on the lubricating oil circuit, the oil outlet of the hydraulically controlled one-way valve is communicated with the outlet of the lubricating oil tank, the oil inlet of the hydraulically controlled one-way valve is communicated with the chain lubricating oil outlet, the control oil port of the hydraulically controlled one-way valve is communicated with the first oil circuit through the control oil circuit, and is used to control the on-off of the lubricating oil circuit through the hydraulically controlled one-way valve; when the hydraulic oil flows in the first oil circuit in the forward direction, the oil outlet of the hydraulically controlled one-way valve is communicated with the oil inlet, and the lubricating oil is discharged from the chain lubricating oil outlet through the lubricating oil circuit; and when the hydraulic oil flows in the reverse direction or does not flow in the first oil circuit, the lubricating oil cannot flow through the hydraulically controlled one-way valve; One end of the first oil drain circuit is connected to the oil drain port of the hydraulic motor, and the other end is connected to the oil outlet of the hydraulically controlled one-way valve, so that the hydraulic oil in the housing of the hydraulic motor is discharged from the first oil drain circuit into the lubricating oil circuit, and is discharged from the chain lubricating oil outlet through the lubricating oil circuit to flow to the chain to lubricate the chain; The first one-way valve is arranged on the first oil drain line, the oil inlet of the first one-way valve is communicated with the oil drain port of the hydraulic motor, and the oil outlet of the first one-way valve is communicated with the oil outlet of the hydraulically controlled one-way valve, and is used to prevent the lubricating oil from flowing back into the hydraulic motor from the first oil drain line when the lubricating oil tank is drained; One end of the second oil drain circuit is connected to the oil drain port of the hydraulic motor, and the other end is connected to the first oil circuit, so as to be used for draining the hydraulic oil in the hydraulic motor housing from the first oil circuit through the second oil drain circuit when the hydraulic motor stops rotating; The second one-way valve is provided on the second oil drain line, the oil inlet of the second one-way valve is communicated with the oil drain port of the hydraulic motor, and the oil outlet of the second one-way valve is communicated with the first oil line, and is used to prevent the hydraulic oil from reversely flowing from the second oil drain line into the hydraulic motor when the hydraulic oil is supplied to the first chamber of the piston cylinder or when the hydraulic oil in the first chamber of the piston cylinder is discharged; The third one-way valve is arranged on the lubricating oil circuit, the oil inlet of the third one-way valve is connected to the outlet of the lubricating oil tank, and the oil outlet of the third one-way valve is connected to the oil outlet of the hydraulic control one-way valve, and is used to prevent the hydraulic oil from flowing back from the lubricating oil circuit to the lubricating oil tank when the hydraulic motor housing leaks oil.

2. The chain lubrication and hydraulic motor oil drain linkage control system according to claim 1, characterized in that: The hydraulically controlled one-way valve is arranged on the first oil drain line, the oil outlet of the hydraulically controlled one-way valve is communicated with the oil drain port of the hydraulic motor, and the oil inlet of the hydraulically controlled one-way valve is communicated with the lubricating oil line, and is used to control the on-off of the first oil drain line through the hydraulically controlled one-way valve. When the hydraulic oil flows in the first oil line in a forward direction, the oil outlet of the hydraulically controlled one-way valve is communicated with the oil inlet, and the hydraulic oil in the hydraulic motor housing is discharged from the first oil drain line into the lubricating oil line, and is discharged from the chain lubricating oil outlet through the lubricating oil line, and flows to the chain to lubricate the chain; The third one-way valve is not provided on the lubricating oil circuit.

3. The chain lubrication and hydraulic motor oil drain linkage control system according to claim 1, characterized in that: It also includes a first stop valve, which is arranged on the first oil leakage line and is used to adjust the on-off of the first oil leakage line.

4. The chain lubrication and hydraulic motor oil drain linkage control system according to claim 3, characterized in that: The first one-way valve is not provided on the first oil drain line, and the first stop valve is provided between the oil drain port of the hydraulic motor and the oil outlet of the hydraulically controlled one-way valve.

5. The chain lubrication and hydraulic motor oil drain linkage control system according to claim 1, characterized in that: It also includes a second stop valve, which is arranged on the first oil circuit and is used to adjust the on-off of the first oil circuit.

6. The chain lubrication and hydraulic motor oil drain linkage control system according to claim 5, characterized in that: The second stop valve is arranged between the first chamber of the piston cylinder and the other end of the second oil leakage passage.

7. The chain lubrication and hydraulic motor oil drain linkage control system according to claim 1, characterized in that: The pressure reducing valve is provided on the first passage, the inlet of the pressure reducing valve is connected to the second chamber of the piston cylinder, and the outlet of the pressure reducing valve is connected to the inlet of the lubricating oil tank, so as to reduce the gas pressure to the set pressure after the gas flows forward through the pressure reducing valve, and control the gas pressure in the lubricating oil tank to maintain the set pressure.

8. The chain lubrication and hydraulic motor oil drain linkage control system according to claim 7, characterized in that: A fourth one-way valve is provided on the first passage, and the fourth one-way valve is arranged between the pressure reducing valve and the lubricating oil tank. The inlet of the fourth one-way valve is connected with the outlet of the pressure reducing valve, and the outlet of the fourth one-way valve is connected with the inlet of the lubricating oil tank. It is used for the one-way flow of gas from the first passage to the lubricating oil tank, and prevents the gas and / or lubricating oil from flowing from the first passage to the second chamber of the piston cylinder.

9. The chain lubrication and hydraulic motor oil drain linkage control system according to claim 8, characterized in that: It also includes an overflow passage and a safety relief valve; One end of the overflow passage is communicated with the first passage and is connected between the pressure reducing valve and the lubricating oil tank; The air inlet of the safety relief valve is connected to the other end of the overflow passage, so as to allow the gas to overflow from the air outlet of the safety relief valve through the overflow passage when the outlet pressure of the pressure reducing valve exceeds the maximum gas pressure that the lubricating oil tank can withstand.

10. The chain lubrication and hydraulic motor oil drain linkage control system according to claim 9, characterized in that: The pressure reducing valve is not provided on the first passage. The safety overflow valve is used to allow the gas to overflow from the outlet of the safety overflow valve through the overflow passage when the gas pressure in the lubricating oil tank exceeds the set pressure, thereby controlling the gas pressure in the lubricating oil tank to be maintained at the set pressure.

11. The chain lubrication and hydraulic motor oil drain linkage control system according to claim 1, characterized in that: A third back-pressure one-way valve is provided on the first passage, the inlet of the third back-pressure one-way valve is connected to the second chamber of the piston cylinder, and the outlet of the third back-pressure one-way valve is connected to the inlet of the lubricating oil tank, so as to supply gas in the second chamber of the piston cylinder to the lubricating oil tank in a one-way manner.

12. The chain lubrication and hydraulic motor oil drain linkage control system according to claim 1, characterized in that: A fourth one-way valve is provided on the first passage, the inlet of the fourth one-way valve is connected to the second chamber of the piston cylinder, and the outlet of the fourth one-way valve is connected to the inlet of the lubricating oil tank, so as to supply gas in the second chamber of the piston cylinder to the lubricating oil tank in a one-way manner.

13. The chain lubrication and hydraulic motor oil drain linkage control system according to claim 1, characterized in that: It also includes an oil supply line and an oil return line; One end of the oil supply passage is connected to the oil inlet of the hydraulic motor and is used to supply hydraulic oil to the hydraulic motor; One end of the oil return line is connected to the oil return port of the hydraulic motor and is used for returning the hydraulic oil in the hydraulic motor; The other end of the first oil passage is communicated with the oil return passage.

14. The chain lubrication and hydraulic motor oil drain linkage control system according to claim 13, characterized in that: The oil return line is provided with a first back pressure one-way valve for one-way flow of hydraulic oil from the oil return line to the oil return tank.

15. The chain lubrication and hydraulic motor oil drain linkage control system according to claim 1, characterized in that: The air intake passage is further provided with a filter, which is arranged on the inlet side of the second back-pressure one-way valve and is used to filter impurities in the air.

16. The chain lubrication and hydraulic motor oil drain linkage control system according to claim 1, characterized in that: The lubricating oil circuit is provided with a throttle valve for adjusting the flow of the lubricating oil circuit.

17. The chain lubrication and hydraulic motor oil drain linkage control system according to claim 1, characterized in that: The second chamber of the piston cylinder is provided with a tube body on a side away from the first chamber, and the second chamber of the piston cylinder is connected to the first passage through the tube body; The piston of the piston cylinder is provided with a push rod on the end face of the side away from the first chamber. The push rod is slidably arranged in the tube body and is used to support the push rod through the tube body to prevent the piston from tilting during the sliding process.

18. The chain lubrication and hydraulic motor oil drain linkage control system according to claim 17, characterized in that: An air intake port is provided on the cylinder wall of the piston cylinder, the air intake port is communicated with the second cavity of the piston cylinder, and one end of the air intake passage is communicated with the air intake port.

19. The chain lubrication and hydraulic motor oil drain linkage control system according to claim 18, characterized in that: The air inlet is arranged on the tube wall of the tube body.

20. The chain lubrication and hydraulic motor oil drain linkage control system according to claim 17, 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 arranged between the tube body and the piston, with one end of the compression spring abutting against the tube body and the other end abutting against the piston, and is used to use the elastic force of the compression spring to push the piston toward the first chamber of the piston cylinder, forcing the hydraulic oil in the first chamber of the piston cylinder to be discharged.

21. The chain lubrication and hydraulic motor oil drain linkage control system according to claim 1, characterized in that: The lubricating oil tank is provided with a first partition plate, and the lubricating oil tank is divided from top to bottom into an air inlet chamber and an oil outlet chamber by the first partition plate; The inlet of the lubricating oil tank is in communication with the air intake cavity; The outlet of the lubricating oil tank is communicated with the oil outlet cavity; A first through hole is provided at a first corner of the first partition plate, and the air inlet cavity and the oil outlet cavity are communicated with each other through the first through hole, so that the lubricating oil and gas in the lubricating oil tank flow between the air inlet cavity and the oil outlet cavity.

22. The chain lubrication and hydraulic motor oil drain linkage control system according to claim 21, characterized in that: The lubricating oil tank is further provided with a second partition plate, which is provided below the first partition plate. 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 plate and the second partition plate. The second partition is provided with a second through hole at the diagonal corner opposite to the first corner, and 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 flow between the air inlet chamber, the intermediate chamber and the oil outlet chamber.

23. The chain lubrication and hydraulic motor oil drain linkage control system according to claim 21, characterized in that: A liquid level meter is provided on the outside of the lubricating oil tank. The lowest liquid level height of the liquid level meter is the same as the height of the first partition plate, and is used to detect the liquid level height of the lubricating oil in the lubricating oil tank.

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