Garbage compression vehicle

Abstract

The application provides a garbage compression vehicle and relates to the field of sanitation vehicles. The garbage compression vehicle comprises a garbage bin, a filling assembly, a sewage tank, a hydraulic control system, a lock hook oil cylinder, a lock hook assembly and a pressure maintaining control member. The hydraulic control system has an oil supply oil circuit and an oil return oil circuit. The lock hook oil cylinder is connected between the oil supply oil circuit and the oil return oil circuit. When the filling assembly is in a closed state, the hydraulic control system supplies oil to the lock hook oil cylinder, so that the lock hook oil cylinder is actuated to drive the lock hook assembly to move and hook the sewage tank, and the sewage tank is pulled and abuts against the garbage bin. After the lock hook assembly pulls and abuts the sewage tank against the garbage bin, the hydraulic control system can maintain the pressure of the lock hook oil cylinder, so that the sewage tank is maintained in the pulled and abutted state. The pressure maintaining control member is connected to the load cavity of the lock hook oil cylinder in the pressure maintaining state. When the pressure maintaining of the lock hook oil cylinder fails, the pressure maintaining control member can make the load cavity of the lock hook oil cylinder communicate with the oil supply oil circuit to supply oil and maintain the pressure again. The application can improve the sewage leakage problem.

Description

Technical Field

[0001] This invention relates to the field of sanitation vehicle technology, and more specifically, to a garbage compactor truck. Background Technology

[0002] A garbage compactor truck is a highly efficient sanitation vehicle that integrates garbage collection, compression, and transportation, and is a key piece of equipment for modern urban waste collection and transportation. The garbage compactor truck completes the collection and compression of garbage through a loading assembly at the rear of the vehicle. The loading assembly is generally installed at the rear of the garbage container, and the compression mechanism on the loading assembly significantly reduces the volume of garbage before it is fed into the garbage container, thereby greatly improving the efficiency of a single transport.

[0003] In existing technologies, a wastewater tank is typically installed at the bottom of the loading assembly to collect wastewater from the garbage. Wastewater from the garbage bin and during compression can be recycled into the wastewater tank. However, since the garbage compactor needs to lift the loading assembly to push out the garbage during unloading, the loading assembly and the garbage bin are movable, creating a seam between them.

[0004] The presence of seams can cause wastewater to leak out from the seams when garbage compactors are transporting garbage, resulting in secondary pollution of the road surface. Summary of the Invention

[0005] The present invention aims to provide a garbage compactor truck that, without affecting the original function of the loading assembly, uses a locking hook cylinder to drive the locking hook assembly, which can pull the loading assembly towards the garbage bin and tighten the sewage tank towards the garbage bin, thereby achieving a seal at the joint and improving or even preventing sewage leakage. Most importantly, when the hydraulic control system fails to maintain pressure on the locking hook cylinder, it can perform secondary pressure maintenance to further reduce sewage leakage.

[0006] The embodiments of the present invention can be implemented as follows: This application provides a garbage compactor truck, including a garbage bin, a loading assembly, a sewage tank, a hydraulic control system, a locking hook cylinder, a locking hook assembly, and a pressure holding control component; The filling assembly is located at the rear of the garbage bin, and the sewage tank is located at the bottom of the filling assembly; The locking hook assembly is disposed on the garbage bin, and one end of the locking hook cylinder is connected to the garbage bin, while the other end is connected to the locking hook assembly in a transmission manner. The hydraulic control system has an oil supply circuit and an oil return circuit; The locking hook cylinder is connected between the oil supply circuit and the oil return circuit; When the filling assembly is in the closed state, the hydraulic control system supplies oil to the locking hook cylinder, which causes the locking hook cylinder to move and hook the locking hook assembly onto the sewage tank, thereby pulling the sewage tank towards the garbage tank and abutting it. After the locking hook assembly pulls the sewage tank towards the garbage bin and abuts it, the hydraulic control system can maintain the pressure of the locking hook cylinder, thus keeping the sewage tank in a pulled and abutting state. The pressure holding control component is connected to the load chamber of the locking hook cylinder when it is in the pressure holding state. The pressure holding control component can connect the load chamber of the locking hook cylinder to the oil supply circuit to supply oil and restore pressure when the pressure holding of the locking hook cylinder fails.

[0007] In an optional embodiment, the pressure holding control component includes a first directional valve, which is a three-position six-way directional valve with a main oil inlet P, a main oil return port T, a first working oil port A, a second working oil port B, an intermediate oil inlet L1, and an intermediate oil outlet L2. The main oil inlet P is connected to the oil supply circuit, the main oil return port T is connected to the oil return circuit, the first working oil port A is connected to the load chamber of the locking hook cylinder in the pressure holding state through a first oil circuit, and the second working oil port B is connected to the non-load chamber of the locking hook cylinder in the pressure holding state through a second oil circuit. The first directional valve has a first working position, a second working position, and a neutral position. When the first directional valve is in the first working position, the main oil inlet P is connected to the first working oil inlet A, and the second working oil inlet B is connected to the main return oil inlet T; the intermediate oil inlet L1 and the intermediate oil outlet L2 are closed. When the first directional valve is in the second working position, the main oil inlet P is connected to the second working oil inlet B, the first working oil inlet A is connected to the main return oil inlet T, and the intermediate oil inlet L1 and the intermediate oil outlet L2 are closed. When the first directional valve is in the neutral position, it can maintain the pressure of the load chamber of the locking hook cylinder in the pressure-holding state, thereby keeping the sewage tank in a tightened and abutting state. When the locking hook cylinder fails to maintain pressure, the first reversing valve can connect the load chamber of the locking hook cylinder with the oil supply circuit to supply oil and maintain pressure again.

[0008] In an optional embodiment, the pressure-holding control component further includes a hydraulically controlled check valve. The hydraulic control check valve is located in the first oil circuit, and the hydraulic control check valve can be opened in the direction of supplying oil to the load chamber of the locking hook cylinder.

[0009] In an optional embodiment, the pressure holding control component further includes a one-way valve, which is provided corresponding to the main oil inlet P and is capable of being open in the oil inlet direction of the main oil inlet P.

[0010] In an optional embodiment, when the first directional valve is in the neutral position, the main oil inlet P is connected to the first working oil port A, the second working oil port B and the main return oil port T are both closed, the intermediate oil inlet L1 is connected to the intermediate oil outlet L2, and the first directional valve can maintain pressure on the locking hook cylinder when it is in the neutral position, and can supply oil to the load chamber to maintain pressure again when the pressure in the load chamber of the locking hook cylinder is less than the oil supply circuit pressure and the pressure maintenance fails.

[0011] In an optional embodiment, the garbage compactor further includes a feeding assembly configured to feed the garbage bin; the hydraulic control system further includes a second directional valve and a feeding cylinder; the feeding cylinder is connected to the oil supply circuit and the oil return circuit via the second directional valve, and the feeding cylinder is configured to drive the feeding assembly to perform a feeding action; when the feeding cylinder performs the feeding action, the pressure in the oil supply circuit increases, enabling the main oil inlet P of the first directional valve in the neutral position to connect with the first working oil port A to supply oil to the load chamber.

[0012] In an optional embodiment, the pressure holding control component further includes a pressure sensor and a controller disposed in the first oil circuit. The pressure sensor and the first reversing valve are both electrically connected to the controller. The pressure sensor is configured to detect the pressure of the load chamber of the locking hook cylinder in the pressure holding state. When the pressure sensor detects that the pressure of the load chamber of the locking hook cylinder in the pressure holding state is less than a first preset pressure holding pressure and the pressure holding fails, the controller can control the first reversing valve to switch positions to supply oil to the load chamber of the locking hook cylinder in the pressure holding state.

[0013] In an optional embodiment, the first directional valve also has a pressure-holding state in the neutral position. When the first directional valve is in the neutral position, the main oil inlet P, the main oil return port T, the first working oil port A, and the second working oil port B are all closed; the intermediate oil inlet L1 and the intermediate oil outlet L2 are connected. When the first reversing valve is in the neutral position, and when the pressure sensor detects that the pressure in the load chamber of the locking hook cylinder in the pressure-holding state is less than the first preset pressure-holding pressure and the pressure holding fails, the controller can control the first reversing valve to switch to the first working position to supply oil to the load chamber of the locking hook cylinder in the pressure-holding state. The controller can also control the first reversing valve to switch to the neutral position and maintain pressure after holding the first working position for a preset time; or, the controller can also control the first reversing valve to switch to the neutral position and maintain pressure when the pressure sensor detects that the actual pressure is greater than the second preset pressure value.

[0014] In an optional implementation, when the first reversing valve is in the neutral position and is maintaining pressure in the load chamber of the locking hook cylinder, if the actual pressure detected by the pressure sensor decreases or fluctuates more than a preset range within a unit time, a first alarm signal is issued to prompt the user to check the locking hook cylinder or the hydraulic control check valve. When the first directional valve is in the first working position, and the actual pressure detected by the pressure sensor is less than the third preset pressure after a preset time, a second alarm signal is issued to prompt the user to check the hydraulic control system. When the first directional valve is in the neutral position and the hydraulic control system is performing an action, if the actual pressure detected by the pressure sensor is less than the fourth preset pressure, a third alarm signal is issued to prompt the user to check the first directional valve.

[0015] In an optional embodiment, the hydraulic control system further includes a third directional valve and a lifting cylinder. One end of the lifting cylinder is connected to the garbage bin, and the other end is connected to the filling assembly. The lifting cylinder is connected to the oil supply circuit and the oil return circuit through the third directional valve. Upon receiving the loading device lifting command, the first reversing valve is first controlled to switch to the second working position so that the locking hook assembly can release the lock on the sewage tank; then the third reversing valve is controlled to actuate the lifting cylinder to drive the loading assembly to rise. Upon receiving the loader descent command, the third directional valve is first controlled to actuate, causing the lifting cylinder to move and lower the loader assembly. After confirming that the loader assembly has descended to the correct position, the first directional valve is controlled to switch to the first working position, so that the locking hook assembly hooks onto the sewage tank and pulls the sewage tank towards the garbage tank. After confirming that the sewage tank is pulled towards the garbage tank, the first directional valve is controlled to switch to the neutral position.

[0016] In an optional embodiment, the trash can is equipped with a sensing sensor, and the locking hook assembly is equipped with a sensing part. When the locking hook cylinder is driven to the locking position, the sensing sensor can sense the sensing part and output an electrical signal to determine that the sewage tank is pulled and abutted towards the trash can.

[0017] The beneficial effects of the hydraulic control system and garbage compactor truck provided in this invention include: This application connects the locking hook cylinder to the oil supply and return lines of the hydraulic control system, and makes the locking hook cylinder drively connected to the locking hook assembly installed in the garbage bin. When the filling assembly is in the closed state, the hydraulic control system supplies oil to the locking hook cylinder, which actuates the locking hook cylinder and drives the locking hook assembly to hook onto the sewage tank, pulling the sewage tank towards the garbage bin and pressing it against it. After the locking hook assembly has pulled the sewage tank towards the garbage bin and pressed it against it, the hydraulic control system can maintain pressure in the locking hook cylinder to keep the sewage tank in a state of tight contact with the garbage bin, thereby avoiding the problem of sewage leakage at the joint. Since valve assemblies in hydraulic control systems generally suffer from internal leakage, insufficient pressure holding during pressure holding may lead to inadequate sealing. To address this, this application includes a pressure holding control component connected to the load chamber of the locking hook cylinder during the pressure holding state. When the pressure holding of the locking hook cylinder fails, the pressure holding control component allows the load chamber of the locking hook cylinder to connect with the oil supply circuit for oil supply and pressure holding again, thereby preventing sewage leakage due to sealing failure caused by pressure holding failure. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a structural schematic diagram of the garbage compactor provided in this embodiment; Figure 2 for Figure 1 Enlarged view of the center; Figure 3 This is another structural schematic diagram of the garbage compactor provided in this embodiment; Figure 4 A schematic diagram of the hydraulic control system provided in this embodiment; Figure 5 Another schematic diagram of the hydraulic control system provided in this embodiment.

[0020] Icons: 100-Hydraulic control system; 101-Oil supply circuit; 102-Oil return circuit; 110-Oil pump; 120-First directional valve; 121-First oil circuit; 122-Second oil circuit; 130-Hook locking cylinder; 141-Second directional valve; 142-Third directional valve; 151-Feeding cylinder; 152-Lifting cylinder; 160-Hydraulic check valve; 170-Check valve; 180-Pressure sensor; 300-Garbage compactor truck; 310-Garbage bin; 311-Induction sensor; 330-Filling assembly; 331-Sewage tank; 333-Hook; 350-Hook locking assembly; 351-Hook locking; 352-Rotating rod; 353-Connecting rod; 354-Connecting lug; 355-Drive lug; 356-Sensing part; 360-Seam; 370-Sealing strip; 380-Feeding assembly. Detailed Implementation

[0021] In existing technologies, a wastewater tank is typically installed at the bottom of the loading assembly to collect wastewater from the garbage. Wastewater from the garbage bin and during compression can be recycled into this tank. However, because the garbage compactor needs to lift the loading assembly to push out the garbage during unloading, the loading assembly and the garbage bin are movable, creating a seam between them. This seam can cause wastewater to leak out during garbage transport, resulting in secondary pollution of the road surface.

[0022] To address the aforementioned problems, this invention provides a garbage compactor truck that, without affecting the original function of the filling component, can tighten the compaction component towards the garbage bin by setting a locking hook hydraulic cylinder to drive the locking hook assembly, thereby sealing the joint and improving or even preventing the problem of sewage leakage.

[0023] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0024] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0025] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0026] In the description of this invention, it should be noted that if terms such as "upper," "lower," "inner," or "outer" are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of this invention is usually placed, they are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0027] Furthermore, the terms "first" and "second" are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0028] It should be noted that, where there is no conflict, the features in the embodiments of the present invention can be combined with each other.

[0029] The following detailed description of the overall structure, working principle, and technical effects of the garbage compactor truck provided by the present invention, through embodiments and in conjunction with the accompanying drawings, is a practical example.

[0030] Please refer to Figure 1 and Figure 2 This embodiment provides a garbage compactor truck 300, which can realize functions such as garbage collection, compression and transfer, and is a key piece of equipment for modern urban garbage collection and transportation.

[0031] Please refer to Figures 1 to 5 The garbage compactor truck 300 includes a garbage bin 310, a loading assembly 330, a wastewater tank 331, a hydraulic control system 100, a locking hook cylinder 130, and a locking hook assembly 350. The loading assembly 330 is located at the rear of the garbage bin 310, and the wastewater tank 331 is located at the bottom of the loading assembly 330. The locking hook assembly 350 is located in the garbage bin 310, and one end of the locking hook cylinder 130 is connected to the garbage bin 310, while the other end is connected to the locking hook assembly 350 via a transmission connection. The hydraulic control system 100 has an oil supply line 101 and an oil return line 102. The locking hook cylinder 130 is connected between the oil supply line 101 and the oil return line 102. With the filling assembly 330 in the closed state, the hydraulic control system 100 supplies oil to the locking hook cylinder 130, which causes the locking hook cylinder 130 to move and hook the locking hook assembly 350 onto the sewage tank 331, pulling the sewage tank 331 towards the garbage tank 310. After the locking hook assembly 350 pulls the sewage tank 331 towards the garbage tank 310, the hydraulic control system 100 can maintain pressure in the locking hook cylinder 130, keeping the sewage tank 331 in the pulled and abutted state.

[0032] In this embodiment, the locking hook cylinder 130 is connected to the oil supply line 101 and the oil return line 102 of the hydraulic control system 100, and the locking hook cylinder 130 is connected to the locking hook assembly 350 installed in the garbage bin 310. When the filling assembly 330 is in the closed state, the hydraulic control system 100 supplies oil to the locking hook cylinder 130, which causes the locking hook cylinder 130 to move and hook the locking hook assembly 350 onto the sewage tank 331, pulling the sewage tank 331 towards the garbage bin 310 and ensuring that the locking hook assembly 350 has pulled the sewage tank 331 towards the garbage bin 310 and ensures that the hydraulic control system 100 can maintain pressure in the locking hook cylinder 130, so that the sewage tank 331 remains in a state of tight contact with the garbage bin 310, thereby improving the problem of sewage leakage at the joint 360.

[0033] Please refer to Figures 1 to 3 In this embodiment, a wastewater tank 331 is formed at the bottom of the filling assembly 330. During waste transfer and compression, wastewater in the waste bin 310 and the filling assembly 330 can flow into the wastewater tank 331 and be collected therein. The wastewater tank 331 is provided with a drain outlet, through which the wastewater in the wastewater tank 331 can be discharged.

[0034] Furthermore, since the valve group of the hydraulic control system 100 generally has an internal leakage problem when in the pressure holding state, the locking hook cylinder 130 will have insufficient pressure due to the internal leakage problem when it is in the pressure holding state, resulting in insufficient tension and insufficient sealing, thus causing sewage leakage.

[0035] In this embodiment, the garbage truck also includes a pressure-holding control component. The pressure-holding control component is connected to the load chamber of the locking hook cylinder 130 when it is in the pressure-holding state. The pressure-holding control component can connect the load chamber of the locking hook cylinder 130 to the oil supply circuit 101 to supply oil and restore pressure when the pressure holding of the locking hook cylinder 130 fails.

[0036] This embodiment includes a pressure holding control component, which is connected to the load chamber of the locking hook cylinder 130 when it is in the pressure holding state. When the pressure holding of the locking hook cylinder 130 fails, the pressure holding control component can connect the load chamber of the locking hook cylinder 130 with the oil supply circuit 101 to supply oil and hold the pressure again, thereby avoiding the problem of sewage leakage due to the failure of the sealing due to the failure of the pressure holding.

[0037] Pressure holding failure can be understood as the pressure in the load chamber of the locking hook cylinder 130 decreasing due to internal leakage or other reasons when the cylinder is in the pressure holding state, thereby reducing or failing the tensioning force of the locking hook assembly 350.

[0038] Please refer to Figures 1 to 4Furthermore, the locking hook assembly 350 is rotatably mounted on the bottom of the garbage bin 310, and a hook 333 is correspondingly provided on the side wall of the sewage tank 331. The locking hook cylinder 130 is connected to the locking hook assembly 350 to drive the locking hook assembly 350 to rotate, thereby hooking the locking hook assembly 350 onto the hook 333 and applying a pulling force towards the garbage bin 310 to the hook 333. This pulls the bottom of the filling assembly 330 towards the garbage bin 310 and maintains pressure to keep the locking hook assembly 350 in a taut state. Before the filling assembly 330 needs to be lifted, the locking hook cylinder 130 can also drive the locking hook 351 to rotate, thereby releasing the locking hook assembly 350 from the hook 333. This allows the filling assembly to move relative to the garbage bin 310 and flip upwards to avoid the outlet of the garbage bin 310, so that during unloading, the pusher plate inside the garbage bin 310 can push the garbage out of the opening of the garbage bin 310.

[0039] Please refer to Figures 1 to 3 Furthermore, the locking hook assembly 350 includes two locking hooks 351, which are spaced apart at the bottom of the garbage bin 310 along its width. The two locking hooks 351 are connected to the locking hook cylinder 130 via a transmission assembly. The transmission assembly includes a rotating rod 352 and two adjustable-length connecting rods 353. The rotating rod 352 is rotatably mounted on the bottom of the garbage bin 310 along its width. A connecting lug 354 is provided in the middle of the rotating rod 352, and the connecting lug 354 is connected to the locking hook cylinder 130. Drive lugs 355 are provided at both ends of the rotating rod 352 corresponding to the positions of the two locking hooks 351, and the two drive lugs 355 are hinged to the connecting rods 353. The other end of the connecting rods 353 is hinged to the locking hooks 351. The locking hook cylinder 130 drives the rotating rod 352 to rotate, which in turn drives the connecting rods 353 to move, thereby causing the locking hooks 351 to rotate.

[0040] Please refer to Figures 1 to 4In this embodiment, one end of the locking hook cylinder 130 is connected to the garbage bin 310, and the other end is connected to the connecting lug 354. The retraction of the piston end of the locking hook cylinder 130 can rotate the locking hook 351, causing it to hook onto the hook 333 to pull the filling assembly 330 towards the garbage bin 310. During the locking process, the rod-side chamber of the locking hook cylinder 130 is the load chamber, while the rodless chamber is the non-load chamber. After the locking hook 351 hooks onto the hook 333 to pull the filling assembly 330 towards the garbage bin 310, the hydraulic control system 100 will then maintain the locking hook cylinder 130 in a pressure-holding state. When the locking hook cylinder 130 is in the pressure-holding state, its rod-side chamber is the load chamber, and the rodless chamber is the non-load chamber, so that the locking hook cylinder 130 remains at its extension length, allowing the locking hook 351 to continuously provide tension. The piston end of the locking hook cylinder 130 extends, causing the locking hook 351 to rotate, thereby releasing the locking hook 351 from engagement with the hook 333 and thus releasing the locking of the loading assembly 330. During the unlocking process, the rodless chamber of the locking hook cylinder 130 is the load chamber, while the rod chamber is the non-load chamber. Therefore, in this embodiment, the load chamber in the pressure-holding state corresponds to the rod chamber of the locking hook cylinder 130, while the non-load chamber in the pressure-holding state corresponds to the rodless chamber of the locking hook cylinder 130.

[0041] In other embodiments of this application, due to differences in the design of the transmission structure, the structure of the locking hook 351, and the installation method, the piston rod of the locking hook cylinder 130 may extend to drive the locking hook 351 to rotate, causing the locking hook 351 to hook onto the hook 333 to pull the filling assembly 330 towards the garbage bin 310. During the locking process, the rodless chamber of the locking hook cylinder 130 is the load chamber, while the rod chamber is the non-load chamber. After the locking hook 351 hooks onto the hook 333 to pull the filling assembly 330 towards the garbage bin 310, the hydraulic control system 100 will then keep the locking hook cylinder 130 in a pressure-holding state. When the locking hook cylinder 130 is in the pressure-holding state, its rodless chamber is the load chamber, while the rod chamber is the non-load chamber, so that the locking hook cylinder 130 is maintained at the extension length, allowing the locking hook 351 to continuously provide tension. The retraction of the piston rod of the locking hook cylinder 130 can drive the locking hook 351 to rotate, thereby releasing the locking hook 351 from engagement with the hook 333 and thus releasing the locking of the loading assembly 330. During the unlocking process, the rod-side chamber of the locking hook cylinder 130 is the load chamber, while the rodless chamber is the non-load chamber. Therefore, in this embodiment, the load chamber in the pressure-holding state corresponds to the rodless chamber of the locking hook cylinder 130, while the non-load chamber in the pressure-holding state corresponds to the rod-side chamber of the locking hook cylinder 130.

[0042] Furthermore, a sealing strip 370 is provided at the tail of the garbage bin 310 and / or the bottom of the filling assembly 330. When the locking hook 351 pulls the bottom of the filling assembly 330 toward the garbage bin 310 via the hook 333, the two will compress the sealing strip 370 to deform, thereby sealing the joint 360 and preventing leakage.

[0043] Please refer to Figures 1 to 4 Generally, the hydraulic control system 100 includes an oil tank, an oil pump 110 connected to the oil tank, an oil supply line 101 connected to the oil pump 110, an oil return line 102 connected to the oil tank, a directional valve assembly connected to the oil supply line 101 and the oil return line 102, and an actuating cylinder connected to the directional valve assembly for performing actions. The oil pump 110 is generally connected to the chassis power system of the garbage compactor 300 via a power take-off (PTO) so that the chassis power drives the oil pump 110. Of course, the oil pump 110 can also be driven by a separate power system.

[0044] In this embodiment, the pressure holding control component includes a first directional valve 120, which is a three-position six-way directional valve with a main inlet port P, a main return port T, a first working port A, a second working port B, an intermediate inlet port L1, and an intermediate outlet port L2. The main inlet port P is connected to the oil supply circuit 101, the main return port T is connected to the return oil circuit 102, the first working port A is connected to the load chamber of the locking hook cylinder 130 in the pressure holding state through the first oil circuit 121, and the second working port B is connected to the non-load chamber of the locking hook cylinder 130 in the pressure holding state through the second oil circuit 122. The first directional valve 120 has a first working position, a neutral position, and a second working position. When the first directional valve 120 is in the first working position, the main inlet port P is connected to the first working port A, the second working port B is connected to the main return port T, and the intermediate inlet port L1 and the intermediate outlet port L2 are closed. When the first directional valve 120 is in the second working position, the main oil inlet P is connected to the second working oil port B, the first working oil port A is connected to the main return oil port T, and the intermediate oil inlet L1 and intermediate oil outlet L2 are closed. When the first directional valve 120 is in the neutral position, it can maintain the pressure of the load chamber of the locking hook cylinder 130 in the pressure-holding state, thus keeping the sewage tank 331 in a tightened and abutting state. When the pressure holding of the locking hook cylinder 130 fails, the first directional valve 120 can connect the load chamber of the locking hook cylinder 130 to the oil supply circuit 101 to supply oil and maintain pressure again.

[0045] In this embodiment, the pressure holding control component is set as a first reversing valve 120 with a three-position six-way function. The first reversing valve 120 can realize the reversing control to realize the retraction, extension and pressure holding functions of the piston rod of the locking hook cylinder 130. It can also realize the connection between the load chamber of the locking hook cylinder 130 and the oil supply circuit 101 to supply oil and maintain pressure again when the pressure holding of the locking hook cylinder 130 fails. The overall structure is simple.

[0046] In this embodiment, the pressure holding control component further includes a hydraulically controlled check valve 160. The hydraulically controlled check valve 160 is located in the first oil passage 121 and is capable of being open in the direction of supplying oil to the load chamber of the locking hook cylinder 130. The control port of the hydraulically controlled check valve 160 is connected to the second oil passage 122.

[0047] In this embodiment, a hydraulic control check valve 160 is installed in the first oil circuit 121, so that the load chamber of the locking hook cylinder 130 can be pressure maintained when it is in the pressure holding state.

[0048] Please refer to Figures 1 to 4 Furthermore, the pressure holding control component also includes a one-way valve 170, which is configured corresponding to the main oil inlet P. The one-way valve 170 can be opened in the oil supply direction of the main oil inlet P. That is, the one-way valve 170 is open in the oil supply direction and closed in the oil return direction.

[0049] In this embodiment, the check valve 170 is integrated within the first directional valve 120 and is positioned corresponding to the main oil inlet P. Of course, in other embodiments of this application, the check valve 170 may also be provided separately and connected to the main oil inlet P via a pipeline.

[0050] In this embodiment, the first directional valve 120 also has a pressure-holding state in the neutral position. When the first directional valve 120 is in the neutral position, the main oil inlet P is connected to the first working oil port A, the second working oil port B and the main return oil port T are both closed, and the intermediate oil inlet L1 is connected to the intermediate oil outlet L2. When the first directional valve 120 is in the neutral position, it can maintain pressure on the locking hook cylinder 130, and can supply oil to the load chamber to maintain pressure again when the pressure in the load chamber of the locking hook cylinder 130 is less than the pressure in the oil supply circuit 101 and the pressure holding fails.

[0051] In existing technology, the various branches of the garbage compactor 300 generally use multi-position directional valves to provide continuous tension force to the latch by the locking hook 351 through pressure holding in the neutral position. However, due to the harsh working conditions of the garbage compactor 300, the hydraulic oil tank filter element is rarely replaced or cleaned during use. Over long-term operation, some iron filings and impurities will inevitably be mixed in the hydraulic oil. Iron filings can cause the valve core to stick and cause internal leakage. In addition, the first-way directional valve is usually a spool valve with a spool structure. Due to its structure, there will be internal leakage even in the neutral position pressure holding state. Moreover, the internal leakage will increase with the action of the loading component 330 or the pressure surge of some branches of the hydraulic control system 100, which can lead to the locking hook cylinder 130 actuating, weakening or even releasing the tension force of the locking hook 351 on the latch, causing the locking hook 351 to disengage from the latch, resulting in the joint 360 not being sealed and causing leakage.

[0052] In this embodiment, when the first directional valve 120 is selected to be in the neutral position to maintain pressure on the locking hook cylinder 130, the main oil inlet P is connected to the first working oil port A, while the second working oil port B and the main return oil port T are both cut off. This causes the oil supply circuit 101 to increase pressure when other branches of the hydraulic control system 100, such as compression and feeding, are in operation. Since the main oil inlet P is connected to the first working oil port A in the pressure-maintaining state, the increased pressure in the oil supply circuit 101 is greater than the load chamber pressure of the locking hook cylinder 130 in the pressure-maintaining state, and oil can be supplied to the load chamber. This allows the load chamber to achieve secondary pressure maintenance without the need for active control, resulting in a simple structure.

[0053] Secondly, during the operation of the garbage compactor 300, the power take-off that drives the oil pump 110 will disconnect from the chassis, causing the oil supply circuit 101 to reduce pressure. However, the one-way valve 170 and the hydraulic one-way valve 160 can maintain pressure, thereby avoiding the problem of pressure leakage in the load chamber of the locking hook cylinder 130.

[0054] Please refer to Figures 1 to 4 Specifically, the garbage compactor 300 also includes a feeding assembly 380, which can be installed on the filling assembly 330 and configured to feed garbage into the garbage bin 310. The hydraulic control system 100 also includes a second directional valve 141 and a feeding cylinder 151. The feeding cylinder 151 is connected to the oil supply circuit 101 and the oil return circuit 102 through the second directional valve 141, and is configured to drive the feeding assembly 380 to perform the feeding action. When the feeding cylinder 151 performs the feeding action, the pressure in the oil supply circuit 101 increases, which enables the main oil inlet P of the first directional valve 120, which is in the neutral position, to connect with the first working oil port A to supply oil to the load chamber.

[0055] In this embodiment, the oil supply line 101 of the hydraulic control system 100 is connected to the loading cylinder 151 through the second directional valve 141. In this way, the loading cylinder 151 and the locking hook cylinder 130 are connected in parallel in the oil supply line 101 and the return line 102. The operation of the loading cylinder 151 can increase the pressure of the oil supply line 101 and form a pressure difference with the load chamber of the locking hook cylinder 130 in the pressure holding state. Oil is supplied to the load chamber of the locking hook cylinder 130 in the pressure holding state through the pressure difference, so as to perform secondary pressure holding.

[0056] It should be noted that the feeding cylinder 151 can be a tipping cylinder, a lifting cylinder, etc. Secondly, the oil supply circuit 101 and the oil return circuit 102 are also connected in parallel with the slide plate cylinder, scraper cylinder, etc. of the garbage compression component through a reversing valve. The operation of these cylinders will also increase the pressure of the oil supply circuit 101, thereby enabling the oil supply to the load chamber of the locking hook cylinder 130 in the pressure holding state, so as to increase the pressure holding pressure and improve the tensioning force.

[0057] Please refer to Figures 1 to 3 and Figure 5In another embodiment of this application, the pressure holding control component further includes a pressure sensor 180 and a controller disposed in the first oil circuit 121. Both the pressure sensor 180 and the first directional valve 120 are electrically connected to the controller. The pressure sensor 180 is configured to detect the pressure in the load chamber of the locking hook cylinder 130 when it is in the pressure holding state. When the pressure sensor 180 detects that the pressure in the load chamber of the locking hook cylinder 130 in the pressure holding state is less than a first preset pressure holding pressure and the pressure holding fails, the controller can control the first directional valve 120 to switch to the first working position to supply oil to the load chamber of the locking hook cylinder 130 in the pressure holding state.

[0058] In this embodiment, a pressure sensor 180 and a controller are set up. The pressure sensor 180 is used to detect the load chamber pressure of the locking hook cylinder 130 when it is in pressure holding. When the pressure is detected to be less than the first preset pressure holding pressure and pressure holding fails, the controller switches the first reversing valve 120 to perform secondary pressure holding, thereby avoiding leakage problems.

[0059] It should also be noted that if the pressure sensor 180 detects a pressure lower than the first preset holding pressure, and the oil pump 110 is not in operation, a pressure alarm can be triggered. After the operator engages the power take-off and the oil pump 110 is in operation, the controller will then switch the first reversing valve 120 to the first working position to perform secondary pressure holding.

[0060] Please refer to Figures 1 to 3 and Figure 5 In this embodiment, when the first directional valve 120 is in the neutral position, the main oil inlet P, the main oil return port T, the first working oil port A, and the second working oil port B are all closed. The intermediate oil inlet L1 and the intermediate oil outlet L2 are connected. When the first directional valve 120 is in the neutral position, and when the pressure sensor 180 detects that the pressure in the load chamber of the locking hook cylinder 130 in the pressure-holding state is less than the first preset pressure-holding pressure and the pressure holding fails, the controller can control the first directional valve 120 to switch to the first working position to supply oil to the load chamber of the locking hook cylinder 130 in the pressure-holding state. The controller can also control the first directional valve 120 to switch to the neutral position to hold pressure after maintaining the first working position for a preset time; or, the controller can also control the first directional valve 120 to switch to the neutral position to hold pressure when the pressure sensor 180 detects that the actual pressure is greater than the second preset pressure value.

[0061] In this embodiment, the first reversing valve 120 can also be controlled in conjunction with the controller and pressure detection sensor, making the operation more convenient.

[0062] It should be noted that, generally, the second preset pressure is greater than the first preset pressure; the specific value can be determined experimentally. The preset time setting can also be determined experimentally, mainly ensuring that sufficient holding pressure is achieved.

[0063] Secondly, the pressure sensor 180 can also be used to assist in the diagnosis of fault areas and improve the efficiency of fault diagnosis. In this embodiment, when the first reversing valve 120 is in the neutral position and is maintaining pressure in the load chamber of the locking hook cylinder 130, if the actual pressure detected by the pressure sensor 180 decreases by more than a preset range within a unit time, a first alarm signal is issued to prompt the user to check the locking hook cylinder 130 or the hydraulic check valve 160.

[0064] This can be understood as follows: when the first directional valve 120 is in the neutral position and maintaining pressure, if the pressure sensor 180 detects a rapid drop in the pressure of the load chamber, it is assumed that there may be a pipeline leak, damage to the locking hook cylinder 130, or damage to the hydraulic control check valve 160. This can improve the efficiency of fault diagnosis, narrow down the scope of fault diagnosis, and make maintenance more convenient.

[0065] Please refer to Figures 1 to 3 and Figure 5 Furthermore, when the first directional valve 120 is in the first working position and the actual pressure detected by the pressure sensor 180 is less than the third preset pressure after a preset time, a second alarm signal is issued to prompt the user to check the hydraulic control system 100.

[0066] This can be understood as follows: when the hydraulic control system 100 supplies oil to the locking hook 351 for operation and pressure maintenance, if it fails to reach the pressure maintenance level, it will issue an alarm and indicate a fault in the hydraulic control system 100. For example, a fault in the oil pump 110 or a fault in the oil supply circuit 101 could indicate a problem. This not only provides an alarm but also narrows down the scope of fault diagnosis, facilitating repair.

[0067] Furthermore, when the first directional valve 120 is in the neutral position and the hydraulic control system 100 is performing an action, if the actual pressure detected by the pressure sensor 180 is less than the fourth preset pressure, a third alarm signal is issued to prompt the user to check the first directional valve 120.

[0068] This can be understood as follows: when the first directional valve 120 is in the neutral position, the main inlet port P, the first working port A, the second working port B, and the main return port T are generally all closed. If the hydraulic control system 100 performs compression or feeding actions, the pressure in the oil supply circuit 101 will increase. If the actual pressure detected by the pressure sensor 180 is less than the fourth preset pressure, it may be that the hydraulic check valve 160 has failed to maintain pressure. The possible reason for the failure of the hydraulic check valve 160 to maintain pressure is that the first directional valve 120 has internal leakage, which causes the second working port B to connect with the main supply port A. The increased pressure in the second oil circuit 122 causes the hydraulic check valve 160 to open abnormally. This setting can provide alarm reminders and also narrow down the scope of maintenance, making maintenance more convenient.

[0069] It should be noted that the first alarm signal, the second alarm signal, and the third alarm signal can be displayed using different display codes, or can be alerted using different voice methods.

[0070] Please refer to Figure 2 In this embodiment, the trash can 310 is equipped with a sensing sensor 311, and the locking hook 351 is equipped with a sensing part 356. When the locking hook cylinder 130 drives the locking hook 351 to the locking position, the sensing sensor 311 can sense the sensing part 356 and output an electrical signal.

[0071] Please refer to Figures 1 to 3 and Figure 5 In this embodiment, the hydraulic control system 100 further includes a third directional valve 142 and a lifting cylinder 152. One end of the lifting cylinder 152 is connected to the garbage bin 310, and the other end is connected to the loading assembly 330. The lifting cylinder 152 is connected to the oil supply line 101 and the oil return line 102 through the third directional valve 142. After receiving the lifting command of the loader, the controller first controls the first directional valve 120 to switch to the second working position so that the locking hook assembly 350 releases the lock on the sewage bin 331; then controls the third directional valve 142 to move so that the lifting cylinder 152 moves to drive the loading assembly 330 to rise. After receiving the loader descent command, the third directional valve 142 is first controlled to activate the lifting cylinder 152 to drive the loading assembly 330 to descend. After confirming that the loading assembly 330 has descended to the correct position, the first directional valve 120 is controlled to switch to the second working position so that the locking hook assembly 350 hooks onto the sewage tank 331 and pulls the sewage tank 331 towards the garbage tank 310 to tighten and abut. After confirming that the sewage tank 331 is pulled towards the garbage tank 310 to tighten and abut, the first directional valve 120 is controlled to switch to the neutral position.

[0072] In this embodiment, the control of the locking hook cylinder 130 and the action of the loading component 330 can be linked through the above-mentioned automatic control settings, which can be achieved without manually controlling the first reversing valve 120, making the operation more convenient.

[0073] In this embodiment, the garbage bin 310 is equipped with a sensing sensor 311, and the locking hook assembly 350 is equipped with a sensing part 356. When the locking hook cylinder 130 drives the locking hook assembly 350 to the locking position, the sensing sensor 311 can sense the sensing part 356 and output an electrical signal to determine that the sewage tank 331 is pulled and abutted towards the garbage bin 310.

[0074] In this embodiment, by setting up the detection of the sensing sensor 311, the feedback of the locking hook assembly 350 moving to the locking position can be better, and the detection is more accurate. This allows the controller to determine that the locking hook assembly 350 has moved to the position that pulls the loader assembly toward the garbage bin 310, which facilitates the controller to automatically switch the first reversing valve 120.

[0075] It should be noted that the sensing sensor 311 can be a proximity switch, and the sensing part 356 can be a metal lug connected to the rotating rod 352 according to a preset position.

[0076] Secondly, in this embodiment, the second reversing valve 141 and the third reversing valve 142 are also three-position six-way reversing valves.

[0077] In summary, this embodiment connects the locking hook cylinder 130 to the oil supply line 101 and oil return line 102 of the hydraulic control system 100, and makes the locking hook cylinder 130 drively connected to the locking hook assembly 350 installed in the garbage bin 310. When the filling assembly 330 is in the closed state, the hydraulic control system 100 supplies oil to the locking hook cylinder 130, which causes the locking hook cylinder 130 to move and hook the locking hook assembly 350 onto the sewage tank 331, pulling the sewage tank 331 towards the garbage bin 310 and ensuring that the locking hook assembly 350 pulls the sewage tank 331 towards the garbage bin 310 and ensures that the hydraulic control system 100 maintains pressure in the locking hook cylinder 130, keeping the sewage tank 331 in a state of tight contact with the garbage bin 310, thereby avoiding the problem of sewage leakage at the joint 360. Since the valve group of the hydraulic control system 100 generally has the problem of internal leakage, the pressure holding pressure may be insufficient due to internal leakage, resulting in inadequate sealing. To address this, this application provides a pressure holding control component, which is connected to the load chamber of the locking hook cylinder 130 when it is in the pressure holding state. When the pressure holding of the locking hook cylinder 130 fails, the pressure holding control component can connect the load chamber of the locking hook cylinder 130 with the oil supply circuit 101 to supply oil and hold the pressure again, thereby avoiding the problem of sewage leakage due to the failure of the contact seal caused by the failure of the pressure holding.

[0078] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention.

Claims

1. A garbage compactor truck, characterized in that, Includes a garbage bin (310), a filling assembly (330), a sewage tank (331), a hydraulic control system (100), a locking hook cylinder (130), a locking hook assembly (350), and a pressure holding control component; The filling assembly (330) is located at the rear of the garbage bin (310), and the sewage tank (331) is located at the bottom of the filling assembly (330); The locking hook assembly (350) is disposed on the garbage bin (310), and one end of the locking hook cylinder (130) is connected to the garbage bin (310), and the other end is connected to the locking hook assembly (350) in a transmission manner; The hydraulic control system (100) has an oil supply line (101) and an oil return line (102). The locking hook cylinder (130) is connected between the oil supply line (101) and the oil return line (102); When the filling assembly (330) is in the closed state, the hydraulic control system (100) supplies oil to the locking hook cylinder (130), which causes the locking hook cylinder (130) to move and drive the locking hook assembly (350) to hook onto the sewage tank (331), thereby pulling the sewage tank (331) towards the garbage tank (310) to abut against it. After the locking hook assembly (350) pulls the sewage tank (331) toward the garbage tank (310) and abuts it, the hydraulic control system (100) can keep the locking hook cylinder (130) pressurized, so that the sewage tank (331) remains in the pulled and abutted state. The pressure holding control component is connected to the load chamber of the locking hook cylinder (130) when it is in the pressure holding state. The pressure holding control component can connect the load chamber of the locking hook cylinder (130) with the oil supply circuit (101) to supply oil and hold pressure again when the pressure holding of the locking hook cylinder (130) fails. The pressure holding control component includes a first directional valve (120), which is a three-position six-way directional valve with a main oil inlet P, a main oil return port T, a first working oil port A, a second working oil port B, an intermediate oil inlet L1, and an intermediate oil outlet L2. The main oil inlet P is connected to the oil supply circuit (101), the main oil return port T is connected to the oil return circuit (102), the first working oil port A is connected to the load chamber of the locking hook cylinder (130) in the pressure holding state through the first oil circuit (121), and the second working oil port B is connected to the non-load chamber of the locking hook cylinder (130) in the pressure holding state through the second oil circuit (122). The first directional valve (120) has a first working position, a second working position, and a neutral position; When the first reversing valve (120) is in the first working position, the main oil inlet P is connected to the first working oil inlet A, the second working oil inlet B is connected to the main return oil inlet T, and the intermediate oil inlet L1 and the intermediate oil outlet L2 are both cut off. When the first reversing valve (120) is in the second working position, the main oil inlet P is connected to the second working oil inlet B, the first working oil inlet A is connected to the main return oil inlet T, and the intermediate oil inlet L1 and the intermediate oil outlet L2 are both cut off. When the first reversing valve (120) is in the neutral position, it can maintain the pressure of the load chamber of the locking hook cylinder (130) in the pressure-holding state, so that the sewage tank (331) is kept in the tensioned and abutting state. When the pressure holding of the locking hook cylinder (130) fails, the first reversing valve (120) can connect the load chamber of the locking hook cylinder (130) with the oil supply circuit (101) to supply oil and hold the pressure again.

2. The garbage compactor truck according to claim 1, characterized in that, The pressure holding control component also includes a hydraulic check valve (160). The hydraulic control check valve (160) is located in the first oil circuit (121), and the hydraulic control check valve (160) can be opened in the direction of supplying oil to the load chamber of the locking hook cylinder (130).

3. The garbage compactor truck according to claim 1, characterized in that, The pressure holding control component also includes a one-way valve (170), which is provided corresponding to the main oil inlet P and can be opened in the oil inlet direction of the main oil inlet P.

4. The garbage compactor truck according to any one of claims 1-3, characterized in that, When the first reversing valve (120) is in the neutral position, the main oil inlet P is connected to the first working oil inlet A, the second working oil inlet B and the main return oil inlet T are both closed, and the intermediate oil inlet L1 is connected to the intermediate oil outlet L2. When the first reversing valve (120) is in the neutral position, it can maintain pressure on the locking hook cylinder (130), and can supply oil to the load chamber to maintain pressure again when the pressure in the load chamber of the locking hook cylinder (130) is less than the pressure in the oil supply circuit (101) and the pressure maintenance fails.

5. The garbage compactor truck according to claim 1, characterized in that, The garbage compactor also includes a feeding assembly (380), which is configured to feed the garbage bin (310); the hydraulic control system (100) also includes a second reversing valve (141) and a feeding cylinder (151); the feeding cylinder (151) is connected to the oil supply circuit (101) and the oil return circuit (102) through the second reversing valve (141), and the feeding cylinder (151) is configured to drive the feeding assembly (380) to perform the feeding action; when the feeding cylinder (151) performs the feeding action, the pressure of the oil supply circuit (101) increases, which enables the main oil inlet P of the first reversing valve (120) in the neutral position to be connected to the first working oil port A to supply oil to the load chamber.

6. The garbage compactor truck according to claim 2, characterized in that, The pressure holding control device also includes a pressure sensor (180) and a controller disposed in the first oil circuit (121). The pressure sensor (180) and the first reversing valve (120) are both electrically connected to the controller. The pressure sensor (180) is configured to detect the pressure of the load chamber of the locking hook cylinder (130) in the pressure holding state. When the pressure sensor (180) detects that the pressure of the load chamber of the locking hook cylinder (130) in the pressure holding state is less than the first preset pressure holding pressure and the pressure holding fails, the controller can control the first reversing valve (120) to switch positions and supply oil to the load chamber of the locking hook cylinder (130) in the pressure holding state.

7. The garbage compactor truck according to claim 6, characterized in that, When the first reversing valve (120) is in the neutral position, the main oil inlet P, the main oil return port T, the first working oil port A, and the second working oil port B are all closed, and the intermediate oil inlet L1 and the intermediate oil outlet L2 are connected. When the first reversing valve (120) is in the neutral position, and the pressure sensor (180) detects that the pressure in the load chamber of the locking hook cylinder (130) in the pressure holding state is less than the first preset pressure holding pressure and the pressure holding fails, the controller can control the first reversing valve (120) to switch to the first working position to supply oil to the load chamber of the locking hook cylinder (130) in the pressure holding state; The controller can also control the first reversing valve (120) to switch to the neutral position and maintain pressure after maintaining the first working position for a preset time; or, the controller can also control the first reversing valve (120) to switch to the neutral position and maintain pressure when the pressure sensor (180) detects that the actual pressure is greater than the second preset pressure value.

8. The garbage compactor truck according to claim 6, characterized in that, When the first reversing valve (120) is in the neutral position and is maintaining pressure on the load chamber of the locking hook cylinder (130), if the actual pressure detected by the pressure sensor (180) decreases by more than a preset range within a unit time, a first alarm signal is issued to prompt the user to check the locking hook cylinder (130) or the hydraulic control check valve (160). When the first directional valve (120) is in the first working position, and the actual pressure detected by the pressure sensor (180) is less than the third preset pressure after a preset time, a second alarm signal is issued to prompt the user to check the hydraulic control system (100). When the first directional valve (120) is in the neutral position and the hydraulic control system (100) is performing an action, if the actual pressure detected by the pressure sensor (180) is less than the fourth preset pressure, a third alarm signal is issued to prompt the user to check the first directional valve (120).

9. The garbage compactor truck according to claim 1, characterized in that, The hydraulic control system (100) also includes a third directional valve (142) and a lifting cylinder (152). One end of the lifting cylinder (152) is connected to the garbage bin (310), and the other end is connected to the filling assembly (330). The lifting cylinder (152) is connected to the oil supply line (101) and the oil return line (102) through the third directional valve (142). Upon receiving the lifting command of the loader, the first reversing valve (120) is first controlled to switch to the second working position so that the locking hook assembly (350) releases the lock on the sewage tank (331); then the third reversing valve (142) is controlled to move so that the lifting cylinder (152) moves to drive the loading assembly (330) to rise. After receiving the loader descent command, the third directional valve (142) is first controlled to actuate, so that the lifting cylinder (152) actuates to drive the loading assembly (330) to descend. After confirming that the loading assembly has descended to the position, the first directional valve (120) is controlled to switch to the first working position, so that the locking hook assembly (350) hooks onto the sewage tank (331) and pulls the sewage tank (331) towards the garbage tank (310) to tighten and abut. After confirming that the sewage tank (331) is pulled towards the garbage tank (310) to tighten and abut, the first directional valve (120) is controlled to switch to the middle position.

10. The garbage compactor truck according to claim 9, characterized in that, The trash can (310) is equipped with a sensing sensor (311), and the locking hook assembly (350) is equipped with a sensing part (356). When the locking hook cylinder (130) is driven to the locking position, the sensing sensor (311) can sense the sensing part (356) and output an electrical signal to determine that the sewage tank (331) is pulled and abutted towards the trash can (310).

Images