Power transmission balancing emergency device

Abstract

The present application relates to power transmission balance emergency device technical field, especially to a kind of power transmission balance emergency device, power module;Execution module;And pump control module, it is driving connection with power module and provides power, the pump control module is communicated with execution module and is used to provide output oil liquid to execution module, the pump control module is used for accurate control pressure oil liquid output;When using, three-position four-way reversing valve and three-position four-way servo valve combination control are used, combined with steady pressure response mechanism steady flow voltage reduction, the response speed of system to impact load and control accuracy are improved, then by the linkage of rigidly connected control oil cylinder and the swash plate on bidirectional pump, mechanical feedback and internal hydraulic feedback double protection are realized, ensure that pump displacement is real-time accurately regulated under gravity impact, power output is smooth, bidirectional pump adjustable displacement, adapt to different load and speed demand, improve the passability and stability of whole vehicle under complex working condition.

Description

Technical Field

[0001] This invention relates to the field of power transmission balancing emergency devices, and in particular to a power transmission balancing emergency device. Background Technology

[0002] Heavy-duty vehicles typically have heavy-duty shock absorbers installed on both sides to cope with complex road surfaces and heavy-load conditions. Examples of heavy-duty vehicles include mining dump trucks and heavy-duty engineering transport vehicles. However, during driving or operation, heavy-duty vehicles are frequently subjected to gravitational impacts from the road surface. These impacts occur when heavy-duty vehicles experience bumps, undulations, rapid acceleration, or rapid deceleration. These gravitational impacts cause uneven load fluctuations in the power transmission system, easily leading to problems such as sudden pressure changes in the hydraulic system, unstable power output, and even system damage. These uneven load fluctuations are as follows: 1. Pressure fluctuations caused by gravitational impact: The violent up-and-down movement of heavy vehicles under the action of shock absorbers will cause violent pressure fluctuations in the hydraulic system, which will directly affect the smoothness of power transmission. 2. Abnormal fluctuations caused by system response lag: Under the impact of load, the control valve of a traditional hydraulic system may not respond in time. This can easily lead to lag in the adjustment of pump output displacement, resulting in unstable or interrupted power output, and causing the control system to respond lag and passively bear the fluctuations. 3. High-pressure impact damages components: Instantaneous high-pressure impacts may damage core hydraulic components such as pumps, motors, and valve groups, as there is a lack of effective overpressure protection and energy release structures; 4. Lack of mechanical feedback guarantee: Relying solely on system feedback cannot avoid fluctuations caused by system motion. Purely electric or hydraulic control systems are prone to loss of control under impact or power failure conditions, lacking a rigid physical feedback mechanism to ensure system reliability.

[0003] Therefore, there is an urgent need for a device that can maintain balanced and stable power transmission under gravitational impact and has emergency response capabilities. Summary of the Invention

[0004] The technical problem to be solved by the present invention is: in order to solve the problem that when heavy shock absorbers installed on existing heavy vehicles are frequently subjected to gravity impacts from the road surface, the power transmission system will experience uneven load fluctuations, which can easily lead to sudden pressure changes in the hydraulic system, unstable power output, or even system damage. The present invention provides a power transmission balancing emergency device.

[0005] The technical solution adopted by this invention to solve its technical problem is: a power transmission balancing emergency device, comprising: Power module; Execution module; And a pump control module, which is connected to the power module and provides power. The pump control module is connected to the execution module and is used to precisely control the output of pressurized oil. The pump control module includes a bidirectional pump, an oil pump, a three-position four-way directional valve, a three-position four-way servo valve, and a control cylinder. The power input terminals of the bidirectional pump and the oil pump are both connected to the power module. The output terminal of the oil pump is connected to port a3 of the three-position four-way directional valve and port T6 of the three-position four-way servo valve, respectively. The oil pump's output terminal is unidirectionally connected to ports A and B of the bidirectional pump. Port b4 of the three-position four-way directional valve is connected to the oil tank. Port P1 of the three-position four-way directional valve is connected to the left pilot terminal of the three-position four-way servo valve, and port T1 of the three-position four-way directional valve is connected to the right pilot terminal of the three-position four-way servo valve. Port P6 of the three-position four-way servo valve... The pump has unidirectional connections to ports A and B of the bidirectional pump. Port a7 of the three-position four-way servo valve is connected to port a on the left side of the control cylinder, and port a6 of the three-position four-way servo valve is connected to port b on the right side of the control cylinder. Port A of the bidirectional pump is connected to one end of the execution module, and port B of the bidirectional pump is connected to the other end of the execution module. The movable cylinder body of the control cylinder and the movable valve body of the three-position four-way servo valve are rigidly connected. The swashplate of the bidirectional pump is mounted on the rigid connection. A pressure-stabilizing response mechanism for unidirectional pressure stabilization and improving the system's response speed and control accuracy to impact loads is connected in parallel on the pipeline between the output end of the pump and port a3 of the three-position four-way directional valve. Compared to existing technologies, this solution uses a combination of a three-position four-way directional valve and a three-position four-way servo valve for control, combined with a pressure-stabilizing response mechanism to stabilize flow and reduce pressure, thereby improving the system's response speed and control accuracy to impact loads. Furthermore, the rigidly connected control cylinder is linked with the swashplate on the bidirectional pump to achieve dual protection through mechanical feedback and internal hydraulic feedback, ensuring real-time and precise adjustment of pump displacement under gravity impact, stable power output, and adjustable displacement of the bidirectional pump to adapt to different load and speed requirements, thereby improving the vehicle's passability and stability under complex working conditions.

[0006] In order to implement the pump control module, in some preferred embodiments, the pump control module further includes a first overflow valve, the output end of the oil pump is connected to one end of the first overflow valve, and the other end of the first overflow valve is connected to the oil tank.

[0007] To protect the system pressure, some preferred embodiments further include a system protection mechanism, which is connected to the pump control module and in parallel with the execution module; The system protection mechanism includes an automatic overpressure protection mechanism, which includes a first overpressure protection component and a second overpressure protection component arranged opposite to each other and connected in series. One end of the first overpressure protection component is connected to port A of the bidirectional pump. The output end of the oil pump is located between and connected to the first and second overpressure protection components. One end of the second overpressure protection component is connected to port B of the bidirectional pump. The first overpressure protection component is used to automatically guide the overpressure oil into the low-pressure chamber when the high pressure at port A is abnormal. The second overpressure protection component is used to automatically guide the overpressure oil into the low-pressure chamber when the high pressure at port B is abnormal.

[0008] To ensure that the gradually increasing pressure does not affect the system, a gradual pressure reduction method is adopted when the pressure gradually increases. A first overpressure protection component and a second overpressure protection component are used. The first and second overpressure protection components can achieve step-by-step gradual pressure reduction. In order to implement the first and second overpressure protection components, in some preferred embodiments, the first and second overpressure protection components each include a pilot relief valve, a main relief valve, a first check valve, and a first throttle valve. The pilot relief valve, the main relief valve, and the first check valve are connected in parallel. The first throttle valve is connected in series in the pipeline of the pilot relief valve. The a12 port of the main relief valve is connected to the a29 port. The a29 port is located between the pilot relief valve and the first throttle valve. The first check valve of the first overpressure protection component is used to allow the oil to flow from the second overpressure protection component to the bidirectional pump A port after passing through the first check valve when the oil is output from port B of the bidirectional pump. The output end of the pilot relief valve of the first overpressure protection component is connected to the input end of the first back pressure check valve and the T6 port of the three-position four-way servo valve, respectively. The output end of the first back pressure check valve is connected to the pipeline between the first overpressure protection component and the second overpressure protection component. The first check valve of the second overpressure protection component is used to allow the oil to flow from the first overpressure protection component to the bidirectional pump port B when the oil is output from port A of the bidirectional pump. The output end of the pilot relief valve of the second overpressure protection component is connected to the input end of the second back pressure check valve and the P6 port of the three-position four-way servo valve, respectively. The output end of the second back pressure check valve is connected to the pipeline between the first overpressure protection component and the second overpressure protection component.

[0009] In order to enable maintenance of the first overpressure protection component and the second overpressure protection component, in some preferred embodiments, the first overpressure protection component and the second overpressure protection component further include a shut-off valve. The shut-off valve is arranged in parallel with the pilot relief valve, the main relief valve and the first check valve, respectively. The main function of the shut-off valve is to facilitate maintenance of the first overpressure protection component and the second overpressure protection component.

[0010] To prevent the pressure from rising instantaneously to the system protection pressure, in some preferred embodiments, the automatic overpressure protection mechanism further includes a third overpressure protection component connected in parallel across the first and second overpressure protection components. This third overpressure protection component is used to unload the pump control module when it experiences overpressure. The third overpressure protection component can quickly unload the system when the pressure rises too rapidly or momentarily exceeds the overpressure limit.

[0011] To implement the third overpressure protection component, in some preferred embodiments, the third overpressure protection component is a three-position three-way directional valve. The A port of the bidirectional pump is connected to the a17 port and the reversing end K5 of the three-position four-way directional valve, the B port of the bidirectional pump is connected to the a20 port and the reversing end K5' of the three-position four-way directional valve, the a19 port of the three-position four-way directional valve is connected to the a21 port of the second relief valve, and the a22 port of the second relief valve is connected to the oil tank.

[0012] In order to stop the execution module or system maintenance in an emergency, in some preferred embodiments, the system protection mechanism further includes an emergency unloading mechanism arranged in parallel with the overpressure automatic protection mechanism. The emergency unloading mechanism is used to manually unload the high-pressure oil. The emergency unloading mechanism includes a manual two-position two-way reversing valve. Port a23 of the manual two-position two-way reversing valve is connected to port A of the bidirectional pump, and port a24 of the manual two-position two-way reversing valve is connected to port B of the bidirectional pump.

[0013] To implement the pressure stabilization response mechanism, in some preferred embodiments, the pressure stabilization response mechanism includes a second throttle valve and a second check valve connected in parallel on the pipeline between the output end of the oil pump and port a3 of the three-position four-way directional valve. The second check valve is used to ensure that when pressure and flow shocks occur during the rapid reversal of the bidirectional pump controlled by the three-position four-way directional valve, the high pressure difference generated by the oil through the second throttle valve will flow back to the high pressure side through the second check valve.

[0014] To understand the system pressure, some preferred implementations further include a first pressure monitoring port and a second pressure monitoring port. The first pressure monitoring port is connected to port A of the bidirectional pump and is located between the execution module and the pump control module. The second pressure monitoring port is connected to port B of the bidirectional pump and is located between the execution module and the pump control module.

[0015] The beneficial effects of this invention are as follows: When in use, the power transmission balancing emergency device of this invention adopts a combination of a three-position four-way directional valve and a three-position four-way servo valve for control, combined with a pressure stabilizing and response mechanism to stabilize the flow and reduce pressure, thereby improving the system's response speed and control accuracy to impact loads. Furthermore, the rigidly connected control cylinder is linked with the swashplate on the bidirectional pump to achieve dual protection through mechanical feedback and internal hydraulic feedback, ensuring real-time and accurate adjustment of pump displacement under gravity impact, stable power output, and adjustable displacement of the bidirectional pump to adapt to different load and speed requirements. This improves the vehicle's passability and stability under complex working conditions and avoids the problem of uneven load fluctuations in the power transmission system caused by heavy shock absorbers installed on existing heavy vehicles when frequently subjected to gravity impacts from the road surface, which can easily lead to sudden pressure changes in the hydraulic system, unstable power output, or even system damage. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0017] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the pump control module in this invention; Figure 3 This is a schematic diagram of the structure of the first overpressure protection component in this invention; Figure 4 This is a schematic diagram of the structure of the second overpressure protection component in this invention; Figure 5 This is a schematic diagram of the structure of the third overpressure protection component in this invention.

[0018] In the diagram: 1. Power module; 2. Execution module; 3. Pump control module, 301. Two-way pump, 302. Oil pump, 303. Three-position four-way directional valve, 304. Three-position four-way servo valve, 305. Control cylinder, 306. Pressure stabilizing response mechanism, 3061. Second throttle valve, 3062. Second check valve, 307. First relief valve. 4. System protection mechanism, 401. Automatic overpressure protection mechanism, 4011. First overpressure protection component, 4012. Second overpressure protection component, 4013. Third overpressure protection component, 401a. Pilot relief valve, 401b. Main relief valve, 401c. First check valve, 401d. First throttle valve, 401e. Shut-off valve, 401h. First back pressure check valve, 401g. Second back pressure check valve, 402. Emergency unloading mechanism, 403. Second relief valve; 5. First pressure monitoring port; 6. Second pressure monitoring port. Detailed Implementation

[0019] like Figure 1-5 As shown, a power transmission balancing emergency device includes: Power module 1, which is an electric pump or a mechanical pump; Execution module 2 consists of two variable motors connected in parallel. The two variable motors are respectively connected to the heavy-duty shock absorbers installed on the left and right sides of the heavy vehicle. The two variable motors are for the precise control and measurement of the pressure oil output by the bidirectional pump 301, so as to achieve precise control of the system. And pump control module 3, which is connected to power module 1 and provides power. Pump control module 3 is connected to execution module 2 and is used to precisely control the output of pressure oil. The pump control module 3 includes a bidirectional pump 301, an oil pump 302, a three-position four-way directional valve 303, a three-position four-way servo valve 304, a control cylinder 305, and a first relief valve 307. The power input terminals of the bidirectional pump 301 and the oil pump 302 are both connected to the power module 1. The output terminal of the oil pump 302 is connected to port a3 of the three-position four-way directional valve 303 and port T6 of the three-position four-way servo valve 304, respectively. The oil pump 302 outputs power to the bidirectional pump 301 and the control cylinder 302. Pump 301's ports A and B are unidirectional. The b4 port of the three-position four-way directional valve 303 is connected to the oil tank. The P1 port of the three-position four-way directional valve 303 is connected to the left pilot end of the three-position four-way servo valve 304. The T1 port of the three-position four-way directional valve 303 is connected to the right pilot end of the three-position four-way servo valve 304. The three-position four-way servo valve 304's P6 port is unidirectionally connected to ports A and B of the bidirectional pump 301. Port a7 of 4 is connected to port a at the left end of control cylinder 305. Port a6 of three-position four-way servo valve 304 is connected to port b at the right end of control cylinder 305. Port A of bidirectional pump 301 is connected to ports a25 and a27 of two variable motors at one end of execution module 2. Port B of bidirectional pump 301 is connected to ports a26 and a28 of two variable motors at the other end of execution module 2. The movable cylinder body of control cylinder 305 and the movable valve body of three-position four-way servo valve 304 are rigidly connected. The swashplate of bidirectional pump 301 is set on the rigid connection. A pressure stabilizing response mechanism 306 is connected in parallel on the pipeline between the output end of oil pump 302 and port a3 of three-position four-way directional valve 303. The pressure stabilizing response mechanism 306 is used for unidirectional pressure stabilization and to improve the system's response speed and control accuracy to impact loads. The output end of oil pump 302 is connected to one end of first relief valve 307. The other end of first relief valve 307 is connected to oil tank.

[0020] The emergency device also includes a system protection mechanism 4, which is connected to the pump control module 3 and in parallel with the execution module 2; The system protection mechanism 4 includes an overpressure automatic protection mechanism 401. The overpressure automatic protection mechanism 401 includes a first overpressure protection component 4011, a second overpressure protection component 4012, and a third overpressure protection component 4013, which are arranged opposite to each other and connected in series. One end of the first overpressure protection component 4011 is connected to port A of the bidirectional pump 301. The output end of the oil pump 302 is located between and connected to the first overpressure protection component 4011 and the second overpressure protection component 4012. One end of the second overpressure protection component 4012 is connected to port B of the bidirectional pump 301. The first overpressure protection component 4011 is used to automatically introduce overpressure oil into the low-pressure chamber when the high pressure at port A is abnormal. The second overpressure protection component 4012 is used to automatically introduce overpressure oil into the low-pressure chamber when the high pressure at port B is abnormal. The third overpressure protection component 4013 is connected to both ends of the first overpressure protection component 4011 and the second overpressure protection component 4012. The third overpressure protection component 4013 is used to unload the pump control module 3 when it is overpressured.

[0021] Both the first overpressure protection component 4011 and the second overpressure protection component 4012 include a pilot relief valve 401a, a main relief valve 401b, a first check valve 401c, a first throttle valve 401d, and a shut-off valve 401e. The pilot relief valve 401a, the main relief valve 401b, the first check valve 401c, and the shut-off valve 401e are connected in parallel. The first throttle valve 401d is connected in series in the pipeline of the pilot relief valve 401a. Port a12 of the main relief valve 401b is connected to port a29. Port a29 is located between the pilot relief valve 401a and the first throttle valve 401d. The first check valve 401c of the first overpressure protection component 4011 is used to allow the oil to flow from the second overpressure protection component 4012 to the bidirectional pump 301A port after passing through the first check valve 401c when the oil is output from the port of the bidirectional pump 301B. The output end of the pilot relief valve 401a of the first overpressure protection component 4011 is connected to the input end of the first back pressure first check valve 401c and the T6 port of the three-position four-way servo valve 304, respectively. The output end of the first back pressure first check valve 401c is connected to the pipeline between the first overpressure protection component 4011 and the second overpressure protection component 4012. The first check valve 401c of the second overpressure protection component 4012 is used to allow the oil to flow from the first check valve 401c to the bidirectional pump 301B port after passing through the first overpressure protection component 4011 when the oil is output from the port of the bidirectional pump 301A. The output end of the pilot relief valve 401a of the second overpressure protection component 4012 is connected to the input end of the second back pressure first check valve 401c and the P6 port of the three-position four-way servo valve 304, respectively. The output end of the second back pressure first check valve 401c is connected to the pipeline between the first overpressure protection component 4011 and the second overpressure protection component 4012.

[0022] The third overpressure protection component 4013 is a three-position three-way directional valve. The A port of the bidirectional pump 301 is connected to the a17 port and the switching end K5 of the three-position three-way directional valve. The B port of the bidirectional pump 301 is connected to the a20 port and the switching end K5' of the three-position three-way directional valve. The a19 port of the three-position three-way directional valve is connected to the a21 port of the second relief valve 403. The a22 port of the second relief valve 403 is connected to the oil tank.

[0023] The system protection mechanism 4 also includes an emergency unloading mechanism 402 arranged in parallel with the overpressure automatic protection mechanism 401. The emergency unloading mechanism 402 is used to manually unload the high-pressure oil. The emergency unloading mechanism 402 includes a manual two-position two-way reversing valve. The a23 port of the manual two-position two-way reversing valve is connected to the A port of the bidirectional pump 301, and the a24 port of the manual two-position two-way reversing valve is connected to the B port of the bidirectional pump 301.

[0024] The pressure stabilizing response mechanism 306 includes a second throttle valve 3061 and a second check valve 3062 connected in parallel on the pipeline between the output end of the oil pump 302 and port a3 of the three-position four-way directional valve 303. The function of the parallel check valve and the second throttle valve 3061 is to ensure that when pressure and flow shocks occur during the rapid reversing process of the three-position four-way directional valve 303 controlling the bidirectional pump 301, the high pressure difference generated by the oil through the throttle valve will flow back to the high pressure side through the check valve, thus realizing a stable control system.

[0025] The emergency device also includes a first pressure monitoring port 5 and a second pressure monitoring port 6. The first pressure monitoring port 5 is connected to port A of the bidirectional pump 301 and is located between the execution module 2 and the pump control module 3. The second pressure monitoring port 6 is connected to port B of the bidirectional pump 301 and is located between the execution module 2 and the pump control module 3.

[0026] Its working principle is as follows: When the electric pump is activated, it drives the bidirectional pump 301 to operate. At this time, high-pressure oil is output from port A of the bidirectional pump 301. However, if the three-position four-way directional valve 303 is in the neutral position, the bidirectional pump 301 only runs idle and no oil is output to the execution module 2. When the three-position four-way directional valve 303 is in the right position, the hydraulic oil output from the oil pump 302 passes through the second throttle valve 3061 at a small flow rate. The second throttle valve 3061 plays a role in stabilizing the flow and reducing the pressure. The oil passes through port a3 of the three-position four-way directional valve 303 to port T1, causing the oil to enter the right pilot port side of the three-position four-way servo valve 304. At this time, the three-position four-way servo valve 304 is activated in the right position, causing the control oil to flow from port P6 to port a7, and then enters the control cylinder 305 of the pump control system. At port A on the left, the control cylinder 305 moves to the right. The control cylinder 305 is rigidly connected to the three-position four-way servo valve 304, and the variable pump swashplate is also rigidly connected to it. The advantage of the rigid connection is that it achieves precise feedback between the displacement of the bidirectional pump 301 and the three-position four-way servo valve 304 through physical connection. There is both internal feedback and mechanical feedback, which fully ensures the real-time pressure oil output of the bidirectional pump 301. When oil enters port A of the control cylinder 305, the A port of the bidirectional pump 301 starts to output oil, and the B port of the bidirectional pump 301 enters oil. As the rightward movement of the control cylinder 305 increases, the output displacement also increases. Conversely, the previous action causes oil to exit from the B port of the bidirectional pump 301 and enter from the A port of the bidirectional pump 301. The first relief valve 307 controls the working pressure of the oil pump 302. If the pressure exceeds the set pressure, the pressure is released to the oil tank through the P4 port of the first relief valve 307 to the T4 port.

[0027] During operation, the oil pressure of the bidirectional pump 301 rises to the set pressure of the first overpressure protection component 4011 and the second overpressure protection component 4012. At this time, the high-pressure oil at port A of the bidirectional pump 301 passes through the first overpressure protection component 4011, and the overpressure oil gradually rises. Since the pilot relief valve 401a is open at low pressure and the main relief valve 401b is open at high pressure, the oil first enters the pilot relief valve 401a. The pressure oil passing through here passes through the first back pressure check valve, then through the first check valve 401c on the second overpressure protection component 4012 and enters the low-pressure chamber of the bidirectional pump 301, which is port B, and so on.

[0028] When port A of the bidirectional pump 301 is working, the oil enters port a17 of the three-position three-way directional valve of the third overpressure protection component 4013 and the upper reversing end K5. The three-position three-way directional valve is in the upper position and connects port a17 and port a19, so that the system is under the protection of the third overpressure protection component 4013 in real time. The overpressured oil will be unloaded through the second relief valve 403. At the same time, a manual two-position two-way directional valve is set. When the motor needs to stop, the action will unload the high pressure oil of the bidirectional pump 301 from port A to port B.

[0029] When the terminal execution module 2 requires a precise flow rate of 50L total flow, which needs to be controlled within 50L ±30ml, and the pressure supplied to the terminal execution module 2 fluctuates greatly, such as in the case of an oil-gas shock absorber, the pressure is constantly changing due to road bumps, and there is overpressure. If the pressure exceeds the 21MPa set by the second overflow valve 403 of the third overpressure protection component 4013, The second overflow valve 403 requires prolonged overload to activate, has low sensitivity, and experiences excessive power loss during overflow. The third overpressure protection component 4013 is designed to prevent medium to severe pressure overloads in the system. For example, if the vehicle is severely overloaded and the bumpy ride is prolonged, the second overflow valve 403 will open to protect the system. Under normal circumstances, when the pressure reaches around 20MPa and fluctuates, it ensures the precise damping effect of the hydropneumatic shock absorber. When the pressure reaches 18MPa, the pilot overflow valve 401a activates to perform a small unloading. When the pressure reaches 19MPa, the oil flowing through the pilot overflow valve 401a, under the pressure difference of the second throttle valve 3061, will open the main overflow valve 401b, thus forming an overflow protection layer. This protects the system while also ensuring precise damping of the hydropneumatic shock absorber.

[0030] This solution offers strong impact resistance: the rigidly connected control cylinder 305 is linked with the variable pump swashplate to achieve dual protection through mechanical feedback and internal hydraulic feedback, ensuring real-time and precise adjustment of pump displacement and stable power output under gravity impact.

[0031] The system responds quickly: it adopts a combination of three-position four-way solenoid directional valve and servo valve for control, combined with a throttle valve to stabilize the flow and reduce pressure, thereby improving the system's response speed and control accuracy to impact loads.

[0032] Automatic overpressure protection: The protection system, consisting of pilot relief valve 401a, main relief valve 401b, check valve, etc., automatically directs the overpressure oil into the low-pressure chamber or unloads it when the high pressure at port A is abnormal, thus preventing damage to components.

[0033] Emergency unloading function: High-pressure oil can be directly unloaded through a manual two-position two-way control valve, which facilitates emergency shutdown of the motor or system maintenance.

[0034] High adaptability: The variable displacement motor can adjust the displacement to adapt to different load and speed requirements, improving the vehicle's passability and stability under complex working conditions.

[0035] Based on the above-described preferred embodiments of the present invention, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the inventive concept. The technical scope of this invention is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A power transmission balancing emergency device, characterized in that, include: Power module (1); Execution module (2); And a pump control module (3), which is connected to the power module (1) and provides power. The pump control module (3) is connected to the execution module (2) and is used to provide output oil to the execution module (2). The pump control module (3) is used to precisely control the output of pressure oil. The pump control module (3) includes a bidirectional pump (301), an oil pump (302), a three-position four-way directional valve (303), a three-position four-way servo valve (304), and a control cylinder (305). The power input terminals of the bidirectional pump (301) and the oil pump (302) are both connected to the power module (1) for transmission. The output terminal of the oil pump (302) is connected to port a3 of the three-position four-way directional valve (303) and port T6 of the three-position four-way servo valve (304), respectively. The oil pump (302) is connected unidirectionally from its output end to ports A and B of the bidirectional pump (301). Port b4 of the three-position four-way directional valve (303) is connected to the oil tank. Port P1 of the three-position four-way directional valve (303) is connected to the left pilot end of the three-position four-way servo valve (304). Port T1 of the three-position four-way directional valve (303) is connected to the right pilot end of the three-position four-way servo valve (304). The servo valve (304) is unidirectionally connected to the A and B ports of the bidirectional pump (301) via its P6 port. The a7 port of the three-position four-way servo valve (304) is connected to the a port on the left side of the control cylinder (305). The a6 port of the three-position four-way servo valve (304) is connected to the b port on the right side of the control cylinder (305). The A port of the bidirectional pump (301) is connected to one end of the execution module (2). The B port of the bidirectional pump (301) is connected to the other end of the execution module (2). The movable cylinder body of the control cylinder (305) and the movable valve body of the three-position four-way servo valve (304) are rigidly connected. The swashplate of the bidirectional pump (301) is set on the rigid connection. A pressure stabilizing response mechanism (306) for unidirectional pressure stabilization and improving the system's response speed and control accuracy to impact loads is connected in parallel on the pipeline between the output end of the oil pump (302) and the a3 port of the three-position four-way directional valve (303).

2. The power transmission balancing emergency device according to claim 1, characterized in that: The pump control module (3) also includes a first overflow valve (307), the output end of the oil pump (302) is connected to one end of the first overflow valve (307), and the other end of the first overflow valve (307) is connected to the oil tank.

3. The power transmission balancing emergency device according to claim 1, characterized in that: It also includes a system protection mechanism (40), which is connected to the pump control module (3) and in parallel with the execution module (2); The system protection mechanism (40) includes an overpressure automatic protection mechanism (401). The overpressure automatic protection mechanism (401) includes a first overpressure protection component (4011) and a second overpressure protection component (4012) that are arranged opposite to each other and connected in series. One end of the first overpressure protection component (4011) is connected to port A of the bidirectional pump (301). The output end of the oil pump (302) is located between and connected to the first overpressure protection component (4011) and the second overpressure protection component (4012). One end of the second overpressure protection component (4012) is connected to port B of the bidirectional pump (301). The first overpressure protection component (4011) is used to automatically introduce overpressure oil into the low-pressure chamber when the high pressure at port A is abnormal. The second overpressure protection component (4012) is used to automatically introduce overpressure oil into the low-pressure chamber when the high pressure at port B is abnormal.

4. The power transmission balancing emergency device according to claim 3, characterized in that: The first overpressure protection component (4011) and the second overpressure protection component (4012) both include a pilot relief valve (401a), a main relief valve (401b), a first check valve (401c), and a first throttle valve (401d). The pilot relief valve (401a), the main relief valve (401b), and the first check valve (401c) are connected in parallel. The first throttle valve (401d) is connected in series in the pipeline of the pilot relief valve (401a). The a12 port of the main relief valve (401b) is connected to the a29 port. The a29 port is located between the pilot relief valve (401a) and the first throttle valve (401d). The first check valve (401c) of the first overpressure protection component (4011) is used to allow the oil to flow from the second overpressure protection component (4012) to the A port of the bidirectional pump (301) after passing through the first check valve (401c) when the oil is output from port B of the bidirectional pump (301). The output end of the pilot relief valve (401a) of the first overpressure protection component (4011) is connected to the input end of the first back pressure check valve (401h) and the T6 port of the three-position four-way servo valve (304), respectively. The output end of the first back pressure check valve (401h) is connected to the pipeline between the first overpressure protection component (4011) and the second overpressure protection component (4012). The first check valve (401c) of the second overpressure protection component (4012) is used to allow the oil to flow from the first check valve (401c) to the B port of the bidirectional pump (301) after passing through the first overpressure protection component (4011) when the oil is output from port A of the bidirectional pump (301). The output end of the pilot relief valve (401a) of the second overpressure protection component (4012) is connected to the input end of the second back pressure check valve (401g) and the P6 port of the three-position four-way servo valve (304), respectively. The output end of the second back pressure check valve (401g) is connected to the pipeline between the first overpressure protection component (4011) and the second overpressure protection component (4012).

5. The power transmission balancing emergency device according to claim 4, characterized in that: The first overpressure protection component (4011) and the second overpressure protection component (4012) further include a shut-off valve (401e), which is connected in parallel with the pilot relief valve (401a), the main relief valve (401b), and the first check valve (401c).

6. A power transmission balancing emergency device according to claim 4 or 5, characterized in that: The overpressure automatic protection mechanism (401) further includes a third overpressure protection component (4013) which is connected in parallel at both ends of the first overpressure protection component (4011) and the second overpressure protection component (4012). The third overpressure protection component (4013) is used to unload the pump control module (3) when it is overpressured.

7. The power transmission balancing emergency device according to claim 6, characterized in that: The third overpressure protection component (4013) is a three-position three-way reversing valve. The A port of the bidirectional pump (301) is connected to the a17 port and the reversing end K5 of the three-position four-way reversing valve (303). The B port of the bidirectional pump (301) is connected to the a20 port and the reversing end K5' of the three-position four-way reversing valve (303). The a19 port of the three-position four-way reversing valve (303) is connected to the a21 port of the second relief valve (403). The a22 port of the second relief valve (403) is connected to the oil tank.

8. The power transmission balancing emergency device according to claim 3, characterized in that: The system protection mechanism (40) also includes an emergency unloading mechanism (402) arranged in parallel with the overpressure automatic protection mechanism (401), the emergency unloading mechanism (402) being used for manually unloading high-pressure oil; The emergency unloading mechanism (402) includes a manual two-position two-way reversing valve. Port a23 of the manual two-position two-way reversing valve is connected to port A of the bidirectional pump (301), and port a24 of the manual two-position two-way reversing valve is connected to port B of the bidirectional pump (301).

9. The power transmission balancing emergency device according to claim 1, characterized in that: The pressure stabilizing response mechanism (306) includes a second throttle valve (3061) and a second check valve (3062) connected in parallel on the pipeline between the output end of the oil pump (302) and the a3 port of the three-position four-way reversing valve (303). The second check valve (3062) is used when pressure and flow shocks occur during the rapid reversing process of the three-position four-way reversing valve (303) controlling the bidirectional pump (301). The high pressure difference generated by the oil through the second throttle valve (3061) will flow back to the high pressure side through the second check valve (3062).

10. The power transmission balancing emergency device according to claim 1, characterized in that: It also includes a first pressure monitoring port (5) and a second pressure monitoring port (6). The first pressure monitoring port (5) is connected to port A of the bidirectional pump (301) and is located between the execution module (2) and the pump control module (3). The second pressure monitoring port (6) is connected to port B of the bidirectional pump (301) and is located between the execution module (2) and the pump control module (3).

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