Double-control mechanism for gearbox oil cooling system and directional lubrication system

Abstract

The application discloses a kind of gearbox oil cooling system and directional lubrication system double system connection control's joint control mechanism, oil cooling system includes cooling oil channel by oil suction line one and oil return line, electronic oil pump being arranged between oil suction line one and oil return line and heat exchanger being arranged on oil return line, directional lubrication system includes directional oil channel by oil suction line two and oil delivery line, mechanical pump being arranged between oil suction line two and oil delivery line, joint control mechanism includes the communication line being arranged between the front section of oil return line and oil delivery line, check valve being arranged on communication line, the pressure control device being arranged between the rear section of oil return line and oil delivery line control rear section of oil return line switch in parallel with communication line, the check valve only allows lubricating oil from oil return line to oil delivery line, the check valve and pressure control device are all controlled by oil pressure of oil delivery line, when oil pressure of oil delivery line is less than oil pressure of oil return line, pressure control device closes rear section of oil return line, check valve opens.

Description

TECHNICAL FIELD

[0001] The application relates to a gearbox oil cooling system and directional lubrication system double-system joint control mechanism and belongs to the technical field of gearbox lubrication. BACKGROUND

[0002] In the electric drive project of a mining truck, in order to solve the lubrication and cooling problems of the electric drive gearbox, a mechanical pump is used to perform directional lubrication on the parts that need to be directionally lubricated, wherein the parts that need to be directionally lubricated refer to bearings, gears, synchronizers and the like that are not easily covered by splashed lubricating oil (lubricating oil splashed by a large gear submerged in the lubricating oil at the bottom of the gearbox when rotating at high speed). An electronic oil pump is used to suck oil from the bottom of the electric drive gearbox of the mining truck, pump out the lubricating oil, pass the lubricating oil through the oil hole designed on the shell into the heat exchanger for cooling, and then deliver the lubricating oil back to the inner cavity of the gearbox to cool the gearbox. The mechanical pump is used to lubricate specific parts in specific areas, and the electronic oil pump and the heat exchanger are used to cool the lubricating oil in the inner cavity. Lubrication and cooling are originally two independent systems.

[0003] The mechanical pump has the advantages of large driving torque and is not easy to be stuck. However, on the one hand, the driving shaft connected to the mechanical pump can rotate only when the wheels and shafts inside the gearbox run, and the speed of the driving shaft directly affects the displacement of the mechanical pump. Especially at the starting stage, the rotational speed of the shaft driving the mechanical pump is low, the displacement of the mechanical pump is small, and the parts that need to be directionally lubricated are at risk of insufficient lubrication. On the other hand, it takes a certain time for the lubricating oil to reach each part that needs to be directionally lubricated through the oil channel, and before the lubricating oil reaches each part that needs to be directionally lubricated through the oil channel, there is a risk of poor dry grinding lubrication. SUMMARY

[0004] The technical problem to be solved by the application is how to automatically realize the connection of oil supply and separation of independent systems of the oil cooling system and the directional lubrication system.

[0005] To solve the above problems, the technical solution provided by the application is:

[0006] A control mechanism for the dual-system control of a transmission oil cooling system and a directional lubrication system is disclosed. The oil cooling system includes a cooling oil passage consisting of a first oil suction line and a return oil line, an electronic oil pump located between the first oil suction line and the return oil line, and a heat exchanger located on the return oil line. The directional lubrication system includes a directional oil passage consisting of a second oil suction line and an oil delivery line, and a mechanical pump located between the second oil suction line and the oil delivery line. The control mechanism includes a connecting pipe located between the front section of the return oil line and the oil delivery line, and a control system located on the connecting pipe. A one-way valve and a pressure control device, connected in parallel with the connecting pipeline and positioned between the downstream section of the return oil pipeline and the delivery oil pipeline, control the opening and closing of the downstream section of the return oil pipeline. The one-way valve only allows lubricating oil to flow from the return oil pipeline to the delivery oil pipeline. Both the one-way valve and the pressure control device are controlled by the oil pressure of the delivery oil pipeline. When the oil pressure of the delivery oil pipeline is less than the oil pressure of the return oil pipeline, the pressure control device closes the downstream section of the return oil pipeline and the one-way valve opens. When the oil pressure of the delivery oil pipeline is greater than the oil pressure of the return oil pipeline, the pressure control device opens the downstream section of the return oil pipeline and the one-way valve closes.

[0007] The pressure control device includes a cylinder liner with a cylinder cavity. A piston valve is provided in the cylinder cavity, dividing the cylinder cavity into an upper cylinder cavity and a lower cylinder cavity. The upper cylinder cavity is connected to the oil supply pipeline. A compression spring is provided in the lower cylinder cavity, which is pressed by the piston valve. A valve hole that passes through the piston valve is provided on the piston valve. An oil inlet hole that connects to the front section of the return oil pipeline and an oil outlet hole that connects to the rear section of the return oil pipeline are respectively provided on the left and right cylinder walls of the cylinder cavity. When the piston valve is pushed up by the compression spring so that the valve hole is higher than the oil inlet hole and oil outlet hole on both sides, the return oil pipeline is closed. When the piston valve hole is at the same height as the oil inlet hole and oil outlet hole on both sides, the rear section of the return oil pipeline is opened.

[0008] An upper limit post is installed at the top of the piston valve to press against the top wall of the upper cylinder chamber and to apply the upper limit position to the piston valve.

[0009] The piston valve pre-compresses the spring, which is maintained by the upper limit post pressing against the top wall of the upper cylinder chamber. This ensures that the oil pressure in the upper cylinder chamber is insufficient to overcome the pre-compression force of the spring and prevent the piston valve from moving downward, thus keeping the downstream section of the return oil line closed.

[0010] A lower limit post is installed at the bottom of the lower cylinder chamber to hold the bottom of the piston valve and limit its downward movement. When the oil pressure in the oil supply line is higher than the oil pressure in the return line, the pressure of the oil pressure in the upper cylinder chamber on the piston valve can overcome the pre-compression force of the compression spring, causing the piston valve to move downward and stop at the top of the lower limit post. This ensures that the piston valve orifice is connected at the same height as the oil inlet and outlet on both sides, and opens the latter part of the return line of the oil cooling system.

[0011] An exhaust port is provided on the wall of the lower cylinder chamber.

[0012] The bottom of the cylinder liner body is provided with a threaded hole with a diameter greater than or equal to the cylinder cavity diameter. The bottom of the cylinder cavity is screwed into the threaded hole bolt body from bottom to top, and the lower limit post is fixed on the bolt body.

[0013] The cylinder sleeve body is provided with threaded holes penetrating the inside and outside of the cylinder cavity on both sides, and circumferential positioning bolts are screwed into the threaded holes from the outside, the positioning bolts protrude from the inner wall of the cylinder cavity to form positioning keys, the piston valve is provided with key grooves on both sides, and the positioning keys are located in the key grooves and can slide in the key grooves.

[0014] The oil collecting and distributing cavity is arranged on the oil conveying pipeline, the communication pipeline is communicated with the oil collecting and distributing cavity, and the upper cylinder cavity is communicated with the oil collecting and distributing cavity through the oil pressure pipe.

[0015] The one-way valve has a valve cavity, a valve ball is arranged in the valve cavity, the valve cavity is a cylindrical cavity with a diameter larger than that of the valve ball, the bottom of the valve cavity is a tapered hole, and the valve ball falls into the tapered hole to block the tapered hole; the upper portion of the valve cavity is communicated with the upper segment of the communication pipeline, and the lower end of the tapered hole is communicated with the lower segment of the communication pipeline. Advantageous effects

[0016] 1. The oil cooling system and the directional lubrication system are automatically matched, so that when the mechanical pump of the directional lubrication system cannot fully and timely supply oil to the parts needing directional lubrication, the oil cooling system can automatically supply oil to the directional lubrication system, and when the directional lubrication system can be self-sufficient under normal working conditions, the oil cooling system and the directional lubrication system can be automatically separated in function.

[0017] 2. While realizing the matching of the oil cooling system and the directional lubrication system, the cooling function of the oil cooling system is not weakened. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 The drawings are schematic structural views of the flow channels of the oil cooling system and the directional lubrication system of the gearbox, and the main branches of the oil conveying pipeline are cut away;

[0019] Figure 2 The drawings are schematic structural views of the flow channel joint control structure of the oil cooling system and the directional lubrication system of the gearbox, and the oil cooling system supplies lubricating oil to the directional lubrication system, and arrow A represents the flow direction of the lubricating oil at the bottom of the gearbox from the oil cooling system to the directional lubrication system;

[0020] Figure 3 The drawings are schematic structural views of the flow channel joint control structure of the oil cooling system and the directional lubrication system of the gearbox, and the oil cooling system supplies lubricating oil to the directional lubrication system, and arrow A represents the flow direction of the lubricating oil at the bottom of the gearbox from the oil cooling system to the directional lubrication system; Figure 2 The drawings are schematic structural views of the flow channel joint control structure of the oil cooling system and the directional lubrication system of the gearbox, and the oil cooling system supplies lubricating oil to the directional lubrication system, and arrow A represents the flow direction of the lubricating oil at the bottom of the gearbox from the oil cooling system to the directional lubrication system;

[0021] Figure 4 The drawings are schematic structural views of the flow channel joint control structure of the oil cooling system and the directional lubrication system of the gearbox, and the oil cooling system supplies lubricating oil to the directional lubrication system, and arrow A represents the flow direction of the lubricating oil at the bottom of the gearbox from the oil cooling system to the directional lubrication system;

[0022] Figure 5 One-way valve.

[0023] In the figure: 1, cooling oil channel; 101, oil suction pipeline one; 102, oil return pipeline; 2, electronic oil pump; 3, heat exchanger; 4, directional oil channel; 401, oil suction pipeline two; 402, oil delivery pipeline; 4020, oil collection and distribution cavity; 4021, branch one; 4022, branch two; 5, mechanical pump; 6, communication pipeline; 7, one-way valve; 701, valve cavity; 702, valve ball; 703, conical hole; 8, pressure control device; 801, cylinder sleeve body; 8011, cylinder cavity; 80111, upper cylinder cavity; 8012, lower cylinder cavity; 8012, oil inlet hole; 8013, oil outlet hole; 8014, exhaust hole; 802, piston valve; 8021, valve hole; 8022, key groove; 803, compression spring; 804, upper limit column; 805, lower limit column; 806, bolt body; 807, positioning bolt; 8071, positioning key; 9, oil pressure pipe; 10, right one-two shift shaft; 11, tank bottom lubricating oil. DETAILED DESCRIPTION

[0024] As Figure 1 shown in Fig. 2, the present application relates to a lubricating oil cooling system (hereinafter referred to as oil cooling system) and a directional active lubrication system (hereinafter referred to as directional lubrication system) of a mine truck transmission. The oil cooling system comprises a cooling oil channel 1 composed of an oil suction pipeline one 101 and an oil return pipeline 102, an electronic oil pump 2 arranged between the oil suction pipeline one 101 and the oil return pipeline 102, and a heat exchanger 3 arranged on the oil return pipeline 102. The directional lubrication system comprises a directional oil channel 4 composed of an oil suction pipeline two 401 and an oil delivery pipeline 402, and a mechanical pump 5 arranged between the oil suction pipeline two 401 and the oil delivery pipeline 402.

[0025] In the prior art, the electronic oil pump 2 of the oil cooling system sucks the tank bottom lubricating oil 11 from the bottom of the transmission through the oil suction pipeline one 101, and then the oil is cooled by the heat exchanger 3 arranged on the oil return pipeline 102 before flowing back to the bottom of the transmission, thereby achieving moderate cooling of all components in the transmission.

[0026] The oil delivery pipeline 402 of the directional lubrication system can be branched into multiple branches as needed, as shown in Fig. 4. Figure 1 , 2 As shown in Fig. 4, the oil delivery pipeline 402 has been branched into branch one 4021 and branch two 4022, branch one 4021 mainly runs along the axis of the right one-two shift shaft 10 and the right three-four shift shaft, and branch two 4022 mainly runs along the axis of the left one-two shift shaft and the left three-four shift shaft. Branch one 4021 and branch two 4022 can be further branched to the components that need directional lubrication. Under working conditions, the right one-two shift shaft 10 drives the mechanical pump 5 to rotate, the tank bottom lubricating oil 11 is sucked from the bottom of the transmission through the oil suction pipeline two 401, and then delivered to each component that needs directional lubrication through the oil delivery pipeline 402.

[0027] The application will be further described in connection with the embodiments and the accompanying drawings: Embodiment one

[0028] As Figure 1 A double-system control mechanism of a gearbox oil cooling system and a directional lubrication system is shown in Fig. 4, which includes a communication pipeline 6 arranged between the front section of the oil return pipeline 102 and the oil delivery pipeline 402, a one-way valve 7 arranged on the communication pipeline 6, and a pressure control device 8 arranged between the rear section of the oil return pipeline 102 and the oil delivery pipeline 402 in parallel with the communication pipeline 6 to control the switch of the rear section of the oil return pipeline 102. The one-way valve 7 only allows lubricating oil to flow from the oil return pipeline 102 to the oil delivery pipeline 402, and both the one-way valve 7 and the pressure control device are controlled by the oil pressure of the oil delivery pipeline 402.

[0029] When the oil pressure of the oil delivery pipeline 402 is less than that of the oil return pipeline 102, the pressure control device 8 closes the rear section of the oil return pipeline 102, and the one-way valve 7 is open. At this time, the oil cooling system supplies oil to the oil delivery pipeline 402 of the directional lubrication system, and since the pressure control device 8 closes the rear section of the oil return pipeline 102, all the lubricating oil pumped by the electronic oil pump 2 of the oil cooling system is supplied to the oil delivery pipeline 402 of the directional lubrication system, thereby ensuring that the required directional lubrication components are timely and sufficiently lubricated. Here, the oil pressure of the oil delivery pipeline 402 being less than that of the oil return pipeline 102 generally refers to the initial stage of the starting of the mining truck, and the wheel shaft in the gearbox starts to rotate, but the initial stage speed is low, and the mechanical pump is not enough to pump oil.

[0030] When the oil pressure of the oil delivery pipeline 402 is greater than that of the oil return pipeline 102, the pressure control device 8 opens the rear section of the oil return pipeline 102, and the one-way valve 7 is closed. In this way, the oil cooling system and the directional lubrication system are separated in function, and the oil cooling system and the directional lubrication system operate independently and play their original defined roles.

[0031] As a preferred embodiment, the communication pipeline 6 is located after the heat exchanger 3, and all the lubricating oil supplied to the oil delivery pipeline of the directional lubrication system is cooled by the heat exchanger, so that the cooling effect on the gearbox is not affected at all during the process of the oil cooling system serving the directional lubrication system.

[0032] The pressure control device 8 comprises a cylinder sleeve body 801 with a cylinder cavity 8011, a piston valve 802 is arranged in the cylinder cavity 8011, the cylinder cavity 8011 is divided into an upper cylinder cavity 80111 and a lower cylinder cavity 80112, the upper cylinder cavity 80111 is communicated with the oil delivery pipeline 402, a compression spring 803 is arranged in the lower cylinder cavity 80112 and is pressed by the piston valve 802, a valve hole 8021 is arranged on the piston valve 802 and penetrates the piston valve 802, an oil inlet hole 8012 and an oil outlet hole 8013 are respectively arranged on the left and right cylinder walls of the cylinder cavity 8011 and are communicated with the front section and the rear section of the oil return pipeline 102. When the piston valve 802 is lifted by the compression spring 803 and the valve hole 8021 is higher than the oil inlet hole 8012 and the oil outlet hole 8013, the oil return pipeline 102 is closed; when the valve hole 8021 of the piston valve 802 is communicated with the oil inlet hole 8012 and the oil outlet hole 8013, the rear section of the oil return pipeline 102 is opened.

[0033] An upper limiting column 804 is arranged on the top of the piston valve 802 and can press the top wall of the upper cylinder cavity 80111 to limit the upward movement of the piston valve 802.

[0034] The piston valve 802 is pre-compressed by the compression spring 803, and the upper limiting column 804 is pressed against the top wall of the upper cylinder cavity 80111 to maintain the pre-compression, so that the oil pressure in the upper cylinder cavity 80111 cannot overcome the pre-compression force of the compression spring 803 to avoid the downward movement of the piston valve 802, and the rear section of the oil return pipeline 102 is closed.

[0035] A lower limiting column 805 is arranged at the bottom of the lower cylinder cavity 80112 and can press the bottom of the piston valve 802 to limit the downward movement of the piston valve 802, when the oil pressure of the oil delivery pipeline 402 is higher than the oil pressure of the oil return pipeline 102, the oil pressure in the upper cylinder cavity 80111 can overcome the pre-compression force of the compression spring 803 to make the piston valve 802 move downward and stop at the top end of the lower limiting column 805, so that the valve hole 8021 of the piston valve 802 is communicated with the oil inlet hole 8012 and the oil outlet hole 8013, and the rear section of the oil return pipeline 102 of the oil cooling system is opened.

[0036] An exhaust hole 8014 is arranged on the cavity wall of the lower cylinder cavity 80112 to solve the problem of gas emission and suction when the piston valve 802 moves up and down.

[0037] The bottom of the cylinder sleeve body 801 is provided with a threaded hole with a diameter greater than or equal to the diameter of the cylinder cavity 8011, the bottom of the cylinder cavity 8011 is a bolt body 806 screwed into the threaded hole from bottom to top, and the lower limiting column 805 is fixed on the bolt body 806, so that the piston valve 802 can be easily installed into the threaded hole.

[0038] The cylinder sleeve body 801 is provided with a threaded hole penetrating the inside and outside of the cylinder cavity 8011 on each side, and a circumferential positioning bolt 807 is screwed into the threaded hole from the outside to the inside. The circumferential positioning bolt 807 protrudes from the inner wall of the cylinder cavity 8011 to form a positioning lug 8071. The piston valve 802 is provided with a key groove 8022 on each side. The positioning lug 8071 is located in the key groove 8022 and can slide in the key groove 8022, so as to avoid rotation of the piston valve 802 in the cylinder cavity 8011. Example Two

[0039] As shown in FIGS. Figure 1 , 2 , 4, the difference from Example One is that the joint control mechanism further includes an oil collection and distribution cavity 4020 provided on the oil delivery pipeline 402. The communication pipeline 6 communicates with the oil collection and distribution cavity 4020. The upper cylinder cavity 80111 communicates with the oil collection and distribution cavity 4020 through the oil pressure pipeline 9. All branches of the oil delivery pipeline 402 branch from the oil collection and distribution cavity 4020. Example Three

[0040] As shown in FIGS. Figure 5 , this embodiment provides a one-way valve 7. The one-way valve 7 has a valve cavity 701. The valve cavity 701 has a valve ball 702. The valve cavity 701 is a cylindrical cavity with a diameter larger than that of the valve ball 702. The bottom of the valve cavity 701 is a tapered hole 703. The valve ball 702 falls into the tapered hole 703 to block the tapered hole 703. The upper part of the valve cavity 701 communicates with the upper segment of the communication pipeline 6. The lower end of the tapered hole 703 communicates with the lower segment of the communication pipeline 6. In the application process, when the oil pressure of the oil return pipeline 102 is greater than that of the oil delivery pipeline 402, the lubricating oil in the lower segment of the communication pipeline 6 lifts the valve ball 702. The lubricating oil flows upward from the tapered hole 703 through the gap between the valve ball 702 and the inner wall of the valve cavity 701, so that the one-way valve 7 is in an open state. When the oil pressure of the oil return pipeline 102 is less than that of the oil delivery pipeline 402, the valve ball 702 falls back, and the tapered hole 703 is blocked, so that the one-way valve 7 is in a closed state.

[0041] The above examples are only used to more clearly describe the present application and cannot be regarded as limiting the protection scope covered by the present application. Any equivalent modification shall be regarded as falling within the protection scope covered by the present application.

Claims

1. A control mechanism for a dual-system control of a transmission oil cooling system and a directional lubrication system, wherein the oil cooling system comprises a cooling oil passage (1) consisting of an oil suction line (101) and an oil return line (102), an electronic oil pump (2) disposed between the oil suction line (101) and the oil return line (102), and a heat exchanger (3) disposed on the oil return line (102); and the directional lubrication system comprises a directional oil passage (4) consisting of an oil suction line (2) and an oil delivery line (402), and a mechanical pump (5) disposed between the oil suction line (2) and the oil delivery line (402), characterized in that: The control mechanism includes a connecting pipeline (6) between the front section of the return oil pipeline (102) and the oil supply pipeline (402), a one-way valve (7) on the connecting pipeline (6), and a pressure control device (8) connected in parallel with the connecting pipeline (6) between the rear section of the return oil pipeline (102) and the oil supply pipeline (402) to control the switching of the rear section of the return oil pipeline (102). The one-way valve (7) only allows lubricating oil to flow from the return oil pipeline (102) to the oil supply pipeline (402). Both the pressure control device (8) and the pressure control device (402) are controlled by the oil pressure of the oil supply line (402). When the oil pressure of the oil supply line (402) is less than the oil pressure of the return line (102), the pressure control device (8) closes the downstream section of the return line (102) and the check valve (7) opens. When the oil pressure of the oil supply line (402) is greater than the oil pressure of the return line (102), the pressure control device (8) opens the downstream section of the return line (102) and the check valve (7) closes. The pressure control device (8) includes a cylinder liner body (801) with a cylinder cavity (8011). The cylinder chamber (8011) is equipped with a piston valve (802), which divides the cylinder chamber (8011) into an upper cylinder chamber (80111) and a lower cylinder chamber (80112). The upper cylinder chamber (80111) is connected to the oil supply line (402). The lower cylinder chamber (80112) is equipped with a compression spring (803) pressed by the piston valve (802). The piston valve (802) is equipped with a valve hole (8021) that runs through the cylinder to the left and right. The left and right cylinder walls of the cylinder chamber (8011) are respectively equipped with oil return lines. 102) The oil inlet (8012) at the front and the oil outlet (8013) at the rear of the return oil pipeline (102) are connected. When the piston valve (802) is pushed up by the compression spring (803) so that the valve hole (8021) is higher than the oil inlet (8012) and oil outlet (8013) on both sides, the return oil pipeline (102) is closed. When the valve hole (8021) of the piston valve (802) is connected to the oil inlet (8012) and oil outlet (8013) on both sides at the same height, the rear of the return oil pipeline (102) is opened.

2. The control mechanism for the dual-system control of the transmission oil cooling system and the directional lubrication system according to claim 1, characterized in that: An upper limit post (804) is provided on the top of the piston valve (802) to press against the top wall of the upper cylinder chamber (80111) for putting the piston valve (802) to the upper limit.

3. The joint control mechanism for the dual-system joint control of the gearbox oil cooling system and the directional lubrication system according to claim 2, characterized in that: The piston valve (802) pre-compresses the compression spring (803), and is held in place by the upper limit post (804) against the top wall of the upper cylinder chamber (80111). This ensures that the oil pressure in the upper cylinder chamber (80111) is insufficient to overcome the pre-compression force of the compression spring (803), thus preventing the piston valve (802) from descending and keeping the downstream section of the return oil line (102) closed.

4. The joint control mechanism for the dual-system joint control of the gearbox oil cooling system and the directional lubrication system according to claim 1, characterized in that: A lower limit post (805) is provided at the bottom of the lower cylinder chamber (80112) to hold the bottom of the piston valve (802) and limit the piston valve (802) downward. When the oil pressure in the oil supply line (402) is higher than the oil pressure in the return line (102), the pressure of the oil pressure in the upper cylinder chamber (80111) on the piston valve (802) can overcome the pre-compression force of the compression spring (803) so that the piston valve (802) moves downward and stops at the top of the lower limit post (805) to ensure that the valve hole (8021) of the piston valve (802) is connected at the same height with the oil inlet hole (8012) and oil outlet hole (8013) on both sides, so that the rear section of the return line (102) of the oil cooling system is opened.

5. The joint control mechanism for the dual-system joint control of the transmission oil cooling system and the directional lubrication system according to claim 1, characterized in that: An exhaust port (8014) is provided on the wall of the lower cylinder chamber (80112).

6. The joint control mechanism for the dual-system joint control of the gearbox oil cooling system and the directional lubrication system according to claim 4, characterized in that: The bottom of the cylinder liner body (801) is provided with a threaded hole with a diameter greater than or equal to the diameter of the cylinder cavity (8011). The bottom of the cylinder cavity (8011) is screwed into the threaded hole bolt body (806) from bottom to top. The lower limit post (805) is fixed on the bolt body (806).

7. The joint control mechanism for the dual-system joint control of the transmission oil cooling system and the directional lubrication system according to claim 1, characterized in that: The cylinder liner (801) has threaded holes on both sides that pass through the inside and outside of the cylinder cavity (8011). There are circumferential positioning bolts (807) screwed in from the outside to the inside of the threaded holes. The circumferential positioning bolts (807) protrude from the inner wall of the cylinder cavity (8011) to form positioning keys (8071). The piston valve (802) has keyways (8022) on both sides. The positioning keys (8071) are located in the keyways (8022) and can slide in the keyways (8022).

8. The joint control mechanism for the dual-system joint control of the transmission oil cooling system and the directional lubrication system according to claim 1, characterized in that: It also includes an oil distribution chamber (4020) provided on the oil pipeline (402), the connecting pipeline (6) is connected to the oil distribution chamber (4020), and the upper cylinder chamber (80111) is connected to the oil distribution chamber (4020) through the oil pressure pipe (9).

9. The joint control mechanism for the dual-system joint control of the gearbox oil cooling system and the directional lubrication system according to claim 1, characterized in that: The one-way valve (7) has a valve chamber (701) and a valve ball (702) inside the valve chamber (701). The valve chamber (701) is a cylindrical cavity with a diameter larger than that of the valve ball (702). The bottom of the valve chamber (701) is a conical hole (703). When the valve ball (702) falls into the conical hole (703), it can block the conical hole (703). The upper part of the valve chamber (701) is connected to the upper section of the connecting pipe (6), and the lower end of the conical hole (703) is connected to the lower section of the connecting pipe (6).

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