Self-loading and unloading garbage truck control system and self-loading and unloading garbage truck

Abstract

The present invention discloses a control system for a self-loading and unloading garbage truck and a self-loading and unloading garbage truck. The solution includes a lifting oil cylinder, a outrigger oil cylinder and a first valve group. Among them, the piston rod of the lifting oil cylinder is connected to the lifting mechanism to drive the lifting mechanism to perform a lifting operation. The outrigger oil cylinder is used to drive the outriggers to perform a supporting operation. The first valve group is communicated with the lifting oil cylinder or the outrigger oil cylinder through a pipeline. When the piston rod of the outrigger oil cylinder moves to a first preset position, the outriggers are in place for support, and the rodless cavity of the lifting oil cylinder starts to be filled with hydraulic oil. When the piston rod of the lifting oil cylinder moves to a second preset position, the lifting mechanism is in place for reset, and the rod chamber of the outrigger oil cylinder starts to be filled with hydraulic oil. When performing a garbage dumping operation, the lifting oil cylinder can start to extend the garbage box only after the outrigger oil cylinder is fully extended. When resetting after the garbage dumping is completed, the outrigger oil cylinder can start to retract and reset only after the lifting oil cylinder is fully retracted. Thereby, the safety performance of the self-loading and unloading garbage truck is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of self - loading and unloading garbage trucks, and particularly to a control system for a self - loading and unloading garbage truck and a self - loading and unloading garbage truck. Background Art

[0002] Currently, the lifting of the garbage bin of a self - loading and unloading garbage truck and the movement of the outriggers are usually controlled separately. When dumping garbage, the outriggers are first operated to support the vehicle, and then the garbage bin is lifted for garbage dumping after the outriggers are in place. When the manual operation is not standardized and the outriggers are not fully supported before starting to lift the bin, there is a risk of the whole vehicle tipping over.

[0003] Therefore, how to improve the safety performance of self - loading and unloading garbage trucks has become a technical problem that needs to be urgently solved by those skilled in the art. Summary of the Invention

[0004] The present invention provides a control system for a self - loading and unloading garbage truck and a self - loading and unloading garbage truck to improve the safety performance of the self - loading and unloading garbage truck.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] The present invention discloses a control system for a self - loading and unloading garbage truck, including a lifting oil cylinder, an outrigger oil cylinder and a first valve group. Among them, the piston rod of the lifting oil cylinder is connected to the lifting mechanism to drive the lifting mechanism to perform a lifting operation. The outrigger oil cylinder is used to drive the outriggers to perform a supporting operation. The first valve group is connected to the lifting oil cylinder or the outrigger oil cylinder through a pipeline, and when the piston rod of the outrigger oil cylinder moves to a first preset position, the outriggers are in place, and the rodless cavity of the lifting oil cylinder starts to be filled with hydraulic oil; when the piston rod of the lifting oil cylinder moves to a second preset position, the lifting mechanism returns to place, and the rod - end cavity of the outrigger oil cylinder starts to be filled with hydraulic oil.

[0007] In some embodiments of the present invention, the outrigger oil cylinder is provided with a K port and an L port, and the first preset position is between the K port and the L port;

[0008] The lifting oil cylinder is provided with an M port and an N port, and the second preset position is between the M port and the N port.

[0009] In some embodiments of the present invention, the first valve group includes a first directional control valve, a first pilot - operated check valve, a second pilot - operated check valve, a third pilot - operated check valve and a balance valve, where:

[0010] The A port of the first directional control valve is connected to the inlet of the first pilot - operated check valve, and the B port of the first directional control valve is connected to the rod - end cavity of the lifting oil cylinder; when the first directional control valve is in the left position, the P port and the A port of the first directional control valve are conducted, and the T port and the B port of the first directional control valve are conducted; when the first directional control valve is in the right position, the P port and the B port of the first directional control valve are conducted, and the T port and the A port of the first directional control valve are conducted;

[0011] The outlet of the first pilot-operated check valve is communicated with the rodless cavity of the outrigger cylinder, and the pilot port of the first pilot-operated check valve is communicated with port B of the first directional control valve;

[0012] The inlet of the second pilot-operated check valve is communicated with port K of the outrigger cylinder, the outlet of the second pilot-operated check valve is communicated with the rod chamber of the lifting cylinder, and the pilot port of the second pilot-operated check valve is communicated with port M of the lifting cylinder;

[0013] The inlet of the third pilot-operated check valve is communicated with the inlet of the balance valve, the outlet of the third pilot-operated check valve is communicated with port L of the outrigger cylinder, and the pilot port of the third pilot-operated check valve is communicated with the outlet of the first pilot-operated check valve;

[0014] The outlet of the balance valve is communicated with port N of the lifting cylinder.

[0015] In some embodiments of the present invention, it further includes a loading cylinder and a second valve group. The piston rod of the loading cylinder is connected to the loading mechanism to drive the loading mechanism to execute the loading mode; the second valve group is communicated with the loading cylinder or the lifting cylinder through a pipeline; the second valve group operates in cooperation so that only one of the rodless cavities of the loading cylinder and the lifting cylinder is filled with hydraulic oil.

[0016] In some embodiments of the present invention, the second valve group includes a second directional control valve, a third directional control valve and a relief valve, wherein:

[0017] Port A of the second directional control valve is communicated with port P of the third directional control valve, port B of the second directional control valve is communicated with port P of the first directional control valve, port P of the second directional control valve is communicated with the oil pump, and port T of the second directional control valve is communicated with the oil tank; when the second directional control valve is in the left position, port P and port A of the second directional control valve are conducted, and port T and port B of the second directional control valve are conducted; when the second directional control valve is in the right position, port P and port B of the second directional control valve are conducted, and port T and port A of the second directional control valve are conducted;

[0018] Port T of the third directional control valve is communicated with port T of the first directional control valve, port A of the third directional control valve is communicated with the rod chamber of the loading cylinder through a pipeline, and port B of the third directional control valve is communicated with the rodless cavity of the loading cylinder; when the third directional control valve is in the left position, port P and port A of the third directional control valve are conducted, and port T and port B of the third directional control valve are conducted; when the third directional control valve is in the right position, port P and port B of the third directional control valve are conducted, and port T and port A of the third directional control valve are conducted;

[0019] Port P of the relief valve is communicated with port P of the second directional control valve, and port T of the relief valve is communicated with port T of the second directional control valve.

[0020] In some embodiments of the present invention, when in the loading mode, the second directional control valve is in the left position and the third directional control valve is in the right position; when the loading is completed, the third directional control valve is in the left position;

[0021] When in the lifting mode, the second reversing valve is in the right position and the first reversing valve is in the right position; when the lifting is completed, the first reversing valve is in the left position.

[0022] In some embodiments of the present invention, it further includes a slide plate oil cylinder and a third valve group. Among them, the piston rod of the slide plate oil cylinder is connected to the scraping plate mechanism to drive the scraping plate mechanism to perform the compaction operation; the third valve group is communicated with the slide plate oil cylinder or the feeding oil cylinder through a pipeline, and when the oil pressure in the rodless cavity of the slide plate oil cylinder reaches the threshold value, the oil pressure in the rodless cavity of the feeding oil cylinder is greater than or equal to the oil pressure in the rod cavity of the feeding oil cylinder.

[0023] In some embodiments of the present invention, the third valve group includes a fourth reversing valve, a fifth reversing valve, a sixth reversing valve, a seventh reversing valve and an eighth reversing valve, where:

[0024] The oil inlet of the fourth reversing valve is communicated with the A port of the third reversing valve, and the oil outlet of the fourth reversing valve is communicated with the rod cavity of the slide plate oil cylinder; when the fourth reversing valve is in the left position, the oil inlet and the oil outlet of the fourth reversing valve are cut off; when the fourth reversing valve is in the right position, the oil inlet and the oil outlet of the fourth reversing valve are conducted.

[0025] The oil inlet of the fifth reversing valve is communicated with the A port of the third reversing valve, the oil outlet of the fifth reversing valve is communicated with the oil inlet of the seventh reversing valve, and the oil inlet and the oil outlet of the fifth reversing valve are cut off; when the fifth reversing valve is in the right position, the oil inlet and the oil outlet of the fifth reversing valve are conducted.

[0026] The oil inlet of the sixth reversing valve is communicated with the B port of the third reversing valve, and the oil outlet of the sixth reversing valve and the oil inlets of the seventh reversing valve and the eighth reversing valve are communicated; when the sixth reversing valve is in the left position, the oil inlet and the oil outlet of the sixth reversing valve are cut off; when the sixth reversing valve is in the right position, the oil inlet and the oil outlet of the sixth reversing valve are conducted.

[0027] The oil outlet of the seventh reversing valve is communicated with the rodless cavity of the slide plate oil cylinder; when the seventh reversing valve is in the left position, the oil inlet and the oil outlet of the seventh reversing valve are cut off; when the seventh reversing valve is in the right position, the oil inlet and the oil outlet of the seventh reversing valve are conducted.

[0028] The oil outlet of the eighth reversing valve is communicated with the rod cavity of the feeding oil cylinder; when the eighth reversing valve is in the left position, the oil inlet and the oil outlet of the eighth reversing valve are cut off; when the eighth reversing valve is in the right position, the oil inlet and the oil outlet of the eighth reversing valve are conducted.

[0029] In some embodiments of the present invention, when in the loading mode, the second reversing valve is in the left position, the third reversing valve is in the right position, the fourth, seventh, and eighth reversing valves are all in the right position, and the fifth and sixth reversing valves are all in the left position;

[0030] When in the maintenance mode with the loading mechanism moving upward, the third reversing valve is in the right position, the fifth and eighth reversing valves are both in the right position, and the fifth, sixth, and seventh reversing valves are all in the left position;

[0031] When in the maintenance mode with the loading mechanism moving downward, the third reversing valve is in the left position, the fifth and eighth reversing valves are both in the right position, and the fifth, sixth, and seventh reversing valves are all in the left position;

[0032] When in the maintenance mode with the scraping plate mechanism moving upward, the third reversing valve is in the right position, the fourth, sixth, and seventh reversing valves are all in the right position, and the fifth and eighth reversing valves are all in the left position;

[0033] When in the maintenance mode with the scraping plate mechanism moving downward, the third reversing valve is in the left position, the fourth, sixth, and seventh reversing valves are all in the right position, and the fifth and eighth reversing valves are all in the left position.

[0034] In some embodiments of the present invention, it further includes a scraping plate oil cylinder and a fourth valve group. Among them, the piston rod of the scraping plate oil cylinder is connected to the scraping plate mechanism and drives the scraping plate mechanism to perform the scraping operation; the fourth valve group is communicated with the scraping plate oil cylinder through a pipeline.

[0035] In some embodiments of the present invention, the fourth valve group includes a ninth reversing valve and a flow collector valve, where:

[0036] The A port of the ninth reversing valve is communicated with the first inlet of the flow collector valve, the B port of the ninth reversing valve is communicated with the second inlet of the flow collector valve, the P port of the ninth reversing valve is communicated with the A port of the second reversing valve, and the T port of the ninth reversing valve is communicated with the B port of the second reversing valve; when the ninth reversing valve is in the left position, the P port of the ninth reversing valve is conducted with the A port of the ninth reversing valve, and the T port of the ninth reversing valve is conducted with the B port of the ninth reversing valve; when the ninth reversing valve is in the right position, the P port of the ninth reversing valve is conducted with the B port of the ninth reversing valve, and the T port of the ninth reversing valve is conducted with the A port of the ninth reversing valve;

[0037] The first outlet of the flow collector valve is communicated with the rod chamber of the scraping plate oil cylinder, and the second outlet of the flow collector valve is communicated with the rodless chamber of the scraping plate oil cylinder.

[0038] In some embodiments of the present invention, when the scraping plate oil cylinder is in the scraping mode, the second reversing valve is in the left position and the ninth reversing valve is in the left position. After the scraping is completed, the ninth reversing valve is in the right position.

[0039] In some embodiments of the present invention, a controller is further included, and the controller controls the opening or closing of each valve group.

[0040] The present invention also discloses a self-loading and unloading garbage truck, which applies the self-loading and unloading garbage truck control system as described in any one of the above.

[0041] As can be seen from the above technical solutions, when the piston rod of the outrigger cylinder moves to the first preset position, the outriggers are in place, and the rodless cavity of the lifting cylinder starts to receive hydraulic oil; when the piston rod of the lifting cylinder moves to the second preset position, the lifting mechanism is in place, and the rod chamber of the outrigger cylinder starts to receive hydraulic oil. When performing garbage dumping operations, the lifting cylinder can start to extend and lift the box only after the outrigger cylinder is fully extended. When resetting after garbage dumping is completed, the outrigger cylinder can start to retract and reset only after the lifting cylinder is fully retracted. Thereby improving the safety performance of the self-loading and unloading garbage truck. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some examples or embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained according to the provided drawings, and the present invention can also be applied to other similar scenarios according to the provided drawings. Unless obvious from the language context or otherwise stated, the same reference numerals in the drawings represent the same structure or operation.

[0043] Figure 1 A three-dimensional schematic diagram of a self-loading and unloading garbage truck provided by an embodiment of the present invention;

[0044] Figure 2 A schematic diagram of a self-loading and unloading garbage truck control system provided by an embodiment of the present invention;

[0045] Figure 3 For Figure 2 An enlarged schematic diagram of part C in

[0046] Figure 4 For Figure 2 An enlarged schematic diagram of part D in

[0047] Figure 5 For Figure 2 An enlarged schematic diagram of part E in

[0048] Figure 6 For Figure 2 An enlarged schematic diagram of part F in

[0049] Among them, 1 is the first reversing valve, 2 is the first pilot-operated check valve, 3 is the second pilot-operated check valve, 4 is the third pilot-operated check valve, 5 is the balance valve, 6 is the lifting cylinder, 7 is the outrigger cylinder, 8 is the feeding cylinder, 9 is the relief valve, 10 is the second reversing valve, 11 is the third reversing valve, 11 is the third reversing valve, 12 is the slide plate cylinder, 13 is the fourth reversing valve, 14 is the fifth reversing valve, 15 is the sixth reversing valve, 16 is the seventh reversing valve, 17 is the eighth reversing valve, 19 is the ninth reversing valve, 20 is the flow collector valve, 21 is the oil pump, and 22 is the hydraulic motor. Specific embodiments

[0050] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the related invention and are not intended to limit the invention. The described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without making creative efforts fall within the scope of protection of the present invention.

[0051] Refer to Figure 1 , self-loading and unloading garbage truck: a device for loading garbage into a garbage bin and transporting it to a garbage treatment plant, including a lifting mechanism, an outrigger mechanism, a feeding mechanism, a scraping slide plate mechanism, a garbage bin, etc.

[0052] Lifting mechanism: Lift the trash can to the entrance of the garbage bin, that is, perform the lifting operation.

[0053] Outrigger mechanism: A component that supports the self-loading and unloading garbage truck, that is, performs the support operation.

[0054] Feeding mechanism 01: A component that pours the garbage in the trash can into the garbage bin 03, that is, performs the feeding operation.

[0055] Scraping slide plate mechanism 02: A component that pushes the garbage poured into the entrance 04 of the garbage bin 03 by the trash can into the interior of the garbage bin 03 and compresses the garbage to a certain extent, that is, performs the scraping operation and the compression operation.

[0056] Lifting cylinder: When the piston rod of the lifting cylinder extends, it drives the lifting mechanism to perform the lifting operation.

[0057] Outrigger cylinder. When the piston rod of the outrigger cylinder extends, it drives the outrigger mechanism to perform the support. When the piston rod of the outrigger cylinder retracts, it drives the outrigger mechanism to retract, that is, drives the outrigger mechanism to perform the support operation.

[0058] Feeding cylinder: When the piston rod of the feeding cylinder extends, it drives the feeding mechanism to perform the feeding operation to pour the garbage in the trash can into the garbage bin 03.

[0059] Skid cylinder: When the piston rod of the skid cylinder extends, it drives the scraping skid mechanism 02 to perform a compressing operation to compress the garbage in the garbage bin 03.

[0060] Scraper cylinder: When the piston rod of the scraper cylinder extends, it drives the scraping skid mechanism to perform a scraping operation to push the garbage at the entrance 04 of the garbage bin 03 into the interior of the garbage bin 03.

[0061] As can be seen from the description of the background technology, when the lifting operation starts before the outriggers are fully supported, there is a risk of the whole vehicle tipping over.

[0062] See Figure 2 , A control system for a self-loading and unloading garbage truck according to the present invention includes a lifting cylinder 6, an outrigger cylinder 7, and a first valve group. Among them, the piston rod of the lifting cylinder 6 is connected to the lifting mechanism to drive the lifting mechanism to perform a lifting operation. The outrigger cylinder 7 is used to drive the outriggers to perform a supporting operation. The first valve group is connected to the lifting cylinder 6 or the outrigger cylinder 7 through a pipeline. When the piston rod of the outrigger cylinder 7 moves to a first preset position, the outriggers are fully supported, and hydraulic oil starts to enter the rodless chamber of the lifting cylinder 6; when the piston rod of the lifting cylinder 6 moves to a second preset position, the lifting mechanism is reset in place, and hydraulic oil starts to enter the rod chamber of the outrigger cylinder 7.

[0063] In the present invention, when the piston rod of the outrigger cylinder 7 moves to the first preset position, the outriggers are fully supported, and hydraulic oil starts to enter the rodless chamber of the lifting cylinder 6; when the piston rod of the lifting cylinder 6 moves to the second preset position, the lifting mechanism is reset in place, and hydraulic oil starts to enter the rod chamber of the outrigger cylinder 7. When performing a garbage dumping operation, the lifting cylinder 6 can start to extend the lifting box only after the outrigger cylinder 7 is fully extended. When resetting after the garbage dumping is completed, the outrigger cylinder 7 can start to retract and reset only after the lifting cylinder 6 is fully retracted. Thereby improving the safety performance of the self-loading and unloading garbage truck.

[0064] In some embodiments of the present invention, the outrigger cylinder 7 is provided with a K port and an L port, and the first preset position is between the K port and the L port; the lifting cylinder 6 is provided with an M port and an N port, and the second preset position is between the M port and the N port. Among them, the L port is between the K port and the inlet of the rodless chamber, and the M port is between the N port and the inlet of the rod chamber. In still other embodiments of the present invention, the K port can be between the L port and the inlet of the rodless chamber, and the N port can be between the M port and the inlet of the rod chamber.

[0065] See Figure 3 , In an embodiment of the present invention, the first valve group includes a first reversing valve 1, a first hydraulic control check valve 2, a second hydraulic control check valve 3, a third hydraulic control check valve 4, and a balance valve 5, where:

[0066] The A port of the first reversing valve 1 is communicated with the inlet of the first pilot-operated check valve 2, and the B port of the first reversing valve 1 is communicated with the rod chamber of the lifting cylinder 6; when the first reversing valve 1 is in the left position, the P port and the A port of the first reversing valve 1 are conducted, and the T port and the B port of the first reversing valve 1 are conducted; when the first reversing valve 1 is in the right position, the P port and the B port of the first reversing valve 1 are conducted, and the T port and the A port of the first reversing valve 1 are conducted; the outlet of the first pilot-operated check valve 2 is communicated with the rodless chamber of the outrigger cylinder 7, and the pilot port of the first pilot-operated check valve 2 is communicated with the B port of the first reversing valve 1; the inlet of the second pilot-operated check valve 3 is communicated with the K port of the outrigger cylinder 7, the outlet of the second pilot-operated check valve 3 is communicated with the rod chamber of the lifting cylinder 6, and the pilot port of the second pilot-operated check valve 3 is communicated with the M port of the lifting cylinder 6; the inlet of the third pilot-operated check valve 4 is communicated with the inlet of the balance valve 5, the outlet of the third pilot-operated check valve 4 is communicated with the L port of the outrigger cylinder 7, and the pilot port of the third pilot-operated check valve 4 is communicated with the outlet of the first pilot-operated check valve 2; the outlet of the balance valve 5 is communicated with the N port of the lifting cylinder 6.

[0067] In the control system of the self-loading and unloading garbage truck, two oil ports are opened in the rod chamber of the outrigger cylinder 7: K port and L port. When the outrigger cylinder 7 is fully extended to the end position, the piston of the outrigger cylinder 7 will be between the K port and the L port and cut off the two oil ports. Two oil ports are opened in the rodless chamber of the lifting cylinder 6: M port and N port. When the lifting cylinder 6 is fully retracted to the end position, the piston of the lifting cylinder 6 will be between the M port and the N port and cut off the two oil ports.

[0068] Self-loading garbage truck control system. During garbage dumping operation, DT1 of the first reversing valve 1 is energized, and the first reversing valve 1 switches to the left working position. At this time, the rod chamber of the outrigger cylinder 7 is connected to the fuel tank through the second hydraulic check valve 3, the rod chamber of the lifting cylinder 6, and the first reversing valve 1. The rodless chamber of the outrigger cylinder 7 is connected to the pressure oil source through the first hydraulic check valve 2, the first reversing valve 1, and the second reversing valve 10. The outrigger cylinder 7 extends under the push of the pressure oil to start the supporting operation. When the outrigger cylinder 7 extends to the end position, the piston of the outrigger cylinder 7 is between port K and port L and cuts off the two oil ports. At this time, the third hydraulic check valve 4 is in the open state under the action of the pressure oil in the rodless chamber of the outrigger cylinder 5. The pressure oil in the rodless chamber of the outrigger cylinder 5 connected to the pressure oil source enters the rodless chamber of the lifting cylinder 6 through the third hydraulic check valve 4 and the balance valve 5, and pushes the lifting cylinder 6 to start lifting the garbage bin for garbage dumping operation. After the garbage dumping operation is completed, the outrigger cylinder 7 and the lifting cylinder 6 are in the fully extended state. When performing the reset operation after the garbage dumping operation, DT2 of the first reversing valve 1 is energized, and the first reversing valve 1 switches to the right working position. At this time, the hydraulic control port of the first hydraulic check valve 2 is connected to the pressure oil source through the first reversing valve 1, and the first hydraulic check valve 2 is in the open state. The rod chamber of the lifting cylinder 6 is connected to the pressure oil source through the first reversing valve 1 and the second reversing valve 10. The rodless chamber of the lifting cylinder 6 is connected to the fuel tank through the balance valve 5, the third hydraulic check valve 4, port L of the outrigger cylinder 7, the first hydraulic check valve 2, and the first reversing valve 1. The lifting cylinder 6 starts to retract and reset under the push of the pressure oil. The balance valve 5 provides a certain back pressure to the lifting cylinder 6 during the retraction and reset process of the lifting cylinder 6 to balance the self-weight of the garbage bin and ensure the smoothness of the garbage bin during the falling process. When the lifting cylinder 6 retracts to the end position, the piston of the lifting cylinder 6 is between port M and port N and cuts off the two oil ports. The pressure oil enters the hydraulic control port of the second hydraulic check valve 3 through port M to open the second hydraulic check valve 3. At this time, the hydraulic control port of the third hydraulic check valve 4 is connected to the fuel tank, and the third hydraulic check valve 4 is in the closed state. The pressure oil enters the rod chamber of the outrigger cylinder 7 through the second hydraulic check valve 3 and port K, and the outrigger cylinder 7 starts to retract and reset under the push of the pressure oil.

[0069] The above-mentioned first reversing valve 1 is a solenoid valve. In this way, the controller can control the position switching of the first reversing valve 1, and automatic control can be realized.

[0070] Combined with Figure 2 See Figure 4 , the self-loading garbage truck control system of the embodiment of the present invention further includes a feeding cylinder 8 and a second valve group. The piston rod of the feeding cylinder 8 is connected to the feeding mechanism to drive the feeding mechanism to execute the feeding mode; the second valve group is connected to the feeding cylinder 8 or the lifting cylinder 6 through a pipeline; the second valve group operates in cooperation so that only one of the rodless chambers of the feeding cylinder 8 and the lifting cylinder 6 enters hydraulic oil.

[0071] In the control system of the self-loading and unloading garbage truck of the present invention, multiple reversing valves cooperate to operate, so that only one of the rodless chambers of the feeding oil cylinder 8 and the lifting oil cylinder 6 is filled with hydraulic oil. Therefore, this control system finally realizes that the feeding mode and the lifting mode do not occur simultaneously, avoiding safety accidents such as workers being injured caused by operating errors, lifting the garbage bin during the feeding process or performing feeding operations during the lifting of the garbage bin, thereby improving the safety performance of the self-loading and unloading garbage truck.

[0072] In some embodiments of the present invention, the second valve group includes a second reversing valve 10 and a third reversing valve 11, wherein:

[0073] The P port of the second reversing valve 10 is communicated with the P port of the overflow valve 9 and the outlet of the oil pump 21. The oil pump 21 is driven by a hydraulic motor. The T port of the second reversing valve 10 is communicated with the T port of the overflow valve 9 and the fuel tank. The A port of the second reversing valve 10 is communicated with the P port of the third reversing valve 11. The B port of the second reversing valve 10 is communicated with the P port of the first reversing valve 1. When the second reversing valve 10 is in the left position, the P port and the A port of the second reversing valve 10 are conducted, and the T port and the B port of the second reversing valve 10 are conducted. When the second reversing valve 10 is in the right position, the P port and the B port of the second reversing valve 10 are conducted, and the T port and the A port of the second reversing valve 10 are conducted.

[0074] The T port of the third reversing valve 11 is communicated with the T port of the first reversing valve 1. The A port of the third reversing valve 11 is communicated with the rod chamber of the feeding oil cylinder 8. The B port of the third reversing valve 11 is communicated with the rodless chamber of the feeding oil cylinder 8. When the third reversing valve 11 is in the left position, the P port and the A port of the third reversing valve 11 are conducted, and the T port and the B port of the third reversing valve 11 are conducted. When the third reversing valve 11 is in the right position, the P port and the B port of the third reversing valve 11 are conducted, and the T port and the A port of the third reversing valve 11 are conducted.

[0075] When in the feeding mode, the second reversing valve 10 is in the left position and the third reversing valve 11 is in the right position. When the feeding is completed, the third reversing valve 11 is in the left position.

[0076] When in the lifting mode, the second reversing valve 10 is in the right position and the first reversing valve 1 is in the right position. When the lifting is completed, the first reversing valve 1 is in the left position.

[0077] The left and right positions of the second reversing valve 10, the left and right positions of the third reversing valve 11, and the left and right positions of the first reversing valve 1 can be controlled by hydraulic oil and can also be controlled by solenoid valve electromagnets. In some embodiments of the present invention, the second reversing valve 10, the third reversing valve 11, and the first reversing valve 1 are electromagnetic reversing valves.

[0078] When the left-position electromagnet DT3 of the second reversing valve 10 is turned on, the second reversing valve 10 is in the left position. When the right-position electromagnet DT4 of the second reversing valve 10 is turned on, the second reversing valve 10 is in the right position; when the left-position electromagnet DT5 of the third reversing valve 11 is turned on, the third reversing valve 11 is in the left position. When the right-position electromagnet DT6 of the third reversing valve 11 is turned on, the third reversing valve 11 is in the right position; when the left-position electromagnet DT1 of the first reversing valve 1 is turned on, the first reversing valve 1 is in the left position. When the right-position electromagnet DT2 of the first reversing valve 1 is turned on, the first reversing valve 1 is in the right position.

[0079] For the convenience of control, in some embodiments of the present invention, the above control system further includes a controller 7. The controller 7 is electrically connected to the second reversing valve 10, the third reversing valve 11 and the first reversing valve 1; when in the feeding mode, the controller 7 controls the second reversing valve 10 to be in the left position and the third reversing valve 11 to be in the right position; when the feeding is completed, the controller 7 controls the third reversing valve 11 to be in the left position; when in the lifting mode, the controller 7 controls the second reversing valve 10 to be in the right position and the first reversing valve 1 to be in the right position; when the lifting is completed, the controller 7 controls the first reversing valve 1 to be in the left position.

[0080] The above controller 7 is the controller of the self-loading and unloading garbage truck itself, or can also be an additionally provided controller. The controller is electrically connected to the second reversing valve 10, the third reversing valve 11 and the first reversing valve 1 in a wired or wireless manner to control the operating states of the second reversing valve 10, the third reversing valve 11 and the first reversing valve 1.

[0081] When in the feeding mode, the left-position electromagnet DT3 of the second reversing valve 10 and the right-position electromagnet DT6 of the third reversing valve 11 are energized. The second reversing valve 10 switches to the left working position, and the third reversing valve 11 switches to the right working position. The pressure oil enters the rodless cavity of the feeding oil cylinder 8 to push the feeding oil cylinder 8 to start the feeding mode. After the feeding is completed, the left-position electromagnet DT5 of the third reversing valve 11 is energized, and the third reversing valve 11 switches to the left working position. The pressure oil enters the rod cavity of the feeding oil cylinder 8 to push the feeding oil cylinder 8 to retract and reset. At this time, the P port of the first reversing valve 1 is communicated with the fuel tank through the second reversing valve 10, and the pressure oil cannot enter the lifting oil cylinder 6, and the lifting oil cylinder 6 cannot perform the box lifting mode, realizing the automatic control of prohibiting the box lifting mode in the feeding mode.

[0082] When in the box-lifting mode, the right-position electromagnet DT4 of the second reversing valve 10 and the right-position electromagnet DT2 of the first reversing valve 1 are energized. The second reversing valve 10 switches to the right working position, and the first reversing valve 1 switches to the right working position. The pressure oil enters the rodless cavity of the lifting cylinder 6 to push the lifting cylinder 6 to start the box-lifting mode. After the box-lifting mode is completed, the left-position electromagnet DT1 of the first reversing valve 1 is energized, and the first reversing valve 1 switches to the left working position. The pressure oil enters the rod cavity of the lifting cylinder 6 to push the lifting cylinder 6 to retract and reset. At this time, the P port of the third reversing valve 11 is communicated with the fuel tank through the second reversing valve 10, and the pressure oil cannot enter the feeding cylinder 8, so the feeding cylinder 8 cannot perform the feeding mode, realizing the automatic control of prohibiting the feeding mode in the box-lifting mode.

[0083] Combined with Figure 2 , see Figure 5 , in some embodiments of the present invention, the self-loading and unloading garbage truck control system further includes a slide plate cylinder 12, a feeding cylinder 8 and a third valve group. Among them, the piston rod of the slide plate cylinder 12 is connected to the scraping plate mechanism 02 to drive the scraping plate mechanism 02 to perform the compression operation; the piston rod of the feeding cylinder 8 is connected to the feeding mechanism 01 and drives the feeding mechanism 01 to perform the feeding operation; the third valve group is communicated with the slide plate cylinder 12 or the feeding cylinder 8 through a pipeline, and when the oil pressure in the rodless cavity of the slide plate cylinder 12 reaches the threshold value, the oil pressure in the rodless cavity of the feeding cylinder 8 is greater than or equal to the oil pressure in the rod cavity of the feeding cylinder 8.

[0084] When the oil pressure in the rodless cavity of the slide plate cylinder 12 of the self-loading and unloading garbage truck control system of the present invention reaches the threshold value, it indicates that the loading capacity of the garbage bin of the automatic loading and unloading garbage truck reaches the limit. At this time, the oil pressure in the rodless cavity of the feeding cylinder 8 is greater than or equal to the oil pressure in the rod cavity of the feeding cylinder 8, which means that the feeding cylinder 8 cannot continue to drive the feeding mechanism to perform the feeding operation. Therefore, when the garbage bin is full, the feeding cylinder 8 stops the feeding operation, avoiding the phenomenon of secondary pollution caused by garbage leakage due to human operation errors when continuing to feed after the garbage bin is full.

[0085] In the self-loading and unloading garbage truck control system of the present invention, the third valve group includes a fourth reversing valve 13, a fifth reversing valve 14, a sixth reversing valve 15, a seventh reversing valve 16 and an eighth reversing valve 17.

[0086] The A port of the third reversing valve 11 is respectively communicated with the oil inlet of the fourth reversing valve 13 and the oil inlet of the fifth reversing valve 14. The B port of the third reversing valve 11 is respectively communicated with the oil inlet of the sixth reversing valve 15 and the rodless cavity of the feeding oil cylinder 8. When the third reversing valve 11 is in the left position, the P port of the third reversing valve 11 is conducted with the A port of the third reversing valve 11, and the T port of the third reversing valve 11 is conducted with the B port of the third reversing valve 11. When the third reversing valve 11 is in the right position, the P port of the third reversing valve 11 is conducted with the B port of the third reversing valve 11, and the T port of the third reversing valve 11 is conducted with the A port of the third reversing valve 11.

[0087] The oil outlet of the fourth reversing valve 13 is communicated with the rod cavity of the slide plate oil cylinder 12. When the fourth reversing valve 13 is in the left position, the oil inlet and the oil outlet of the fourth reversing valve 13 are cut off. When the fourth reversing valve 13 is in the right position, the oil inlet and the oil outlet of the fourth reversing valve 13 are conducted.

[0088] The oil outlet of the fifth reversing valve 14 is communicated with the oil inlet of the seventh reversing valve 16, and the oil inlet and the oil outlet of the fifth reversing valve 14 are cut off. When the fifth reversing valve 14 is in the right position, the oil inlet and the oil outlet of the fifth reversing valve 14 are conducted.

[0089] The oil outlet of the seventh reversing valve 16 is communicated with the rodless cavity of the slide plate oil cylinder 12. When the seventh reversing valve 16 is in the left position, the oil inlet and the oil outlet of the seventh reversing valve 16 are cut off. When the seventh reversing valve 16 is in the right position, the oil inlet and the oil outlet of the seventh reversing valve 16 are conducted.

[0090] The oil outlets of the sixth reversing valve 15 and the seventh reversing valve 16 and the oil inlet of the eighth reversing valve 17 are communicated with the oil inlet of the eighth reversing valve 17. When the sixth reversing valve 15 is in the left position, the oil inlet and the oil outlet of the sixth reversing valve 15 are cut off. When the sixth reversing valve 15 is in the right position, the oil inlet and the oil outlet of the sixth reversing valve 15 are conducted.

[0091] The oil outlet of the eighth reversing valve 17 is communicated with the rod cavity of the feeding oil cylinder 8. When the eighth reversing valve 17 is in the left position, the oil inlet and the oil outlet of the eighth reversing valve 17 are cut off. When the eighth reversing valve 17 is in the right position, the oil inlet and the oil outlet of the eighth reversing valve 17 are conducted.

[0092] The third reversing valve 11, the fourth reversing valve 13, the fifth reversing valve 14, the sixth reversing valve 15, the seventh reversing valve 16 and the eighth reversing valve 17 can be hydraulic control reversing valves or electromagnetic reversing valves. In some embodiments of the present invention, the third reversing valve 11, the fourth reversing valve 13, the fifth reversing valve 14, the sixth reversing valve 15, the seventh reversing valve 16 and the eighth reversing valve 17 are electromagnetic valves. By setting them as electromagnetic valves, it is convenient for control.

[0093] In the present invention, the above structure has at least one working mode. For example, when in the feeding mode, the third reversing valve 11 is in the right position, the fourth reversing valve 13, the seventh reversing valve 16 and the eighth reversing valve 17 are all in the right position, and the fifth reversing valve 14 and the sixth reversing valve 15 are both in the left position.

[0094] The hydraulic oil enters the rodless cavity of the feeding oil cylinder 8 through the third reversing valve 11 to push the feeding oil cylinder 8 to extend for feeding operation. The hydraulic oil in the rod cavity of the feeding oil cylinder 8 enters the rodless cavity of the slide plate oil cylinder 12 through the eighth reversing valve 17 and the seventh reversing valve 16 and pushes the slide plate oil cylinder 12 to extend to compress and push the garbage in the garbage bin into the garbage bin to reserve a loading space for the garbage being fed. When the garbage bin is not full, the reaction force F of the garbage in the garbage bin on the slide plate oil cylinder 12 is less than the set working pressure of the system, and the upper oil cylinder 8 continues to perform feeding operation under the push of the hydraulic oil, and the slide plate oil cylinder 12 continues to compress and push the garbage into the garbage bin to reserve a loading space for the garbage being fed. When the garbage bin is full, the reaction force F of the garbage in the garbage bin on the slide plate oil cylinder 12 is greater than or equal to the set working pressure of the system, and the hydraulic oil is not enough to continue to push the feeding oil cylinder 8 for feeding operation, and the feeding operation stops. When the garbage bin is full, the feeding operation stops to achieve automatic control.

[0095] When in the maintenance mode of the feeding mechanism moving upward, the third reversing valve 11 is in the right position, the fifth reversing valve 14 and the eighth reversing valve 17 are both in the right position, and the fifth reversing valve 14, the sixth reversing valve 15 and the seventh reversing valve 16 are all in the left position. The hydraulic oil enters the rodless cavity of the feeding oil cylinder 8 through the third reversing valve 11 to push the feeding oil cylinder 8 to extend, so as to perform maintenance on the feeding mechanism.

[0096] When in the maintenance mode of the feeding mechanism moving downward, the third reversing valve 11 is in the left position, the fifth reversing valve 14 and the eighth reversing valve 17 are both in the right position, and the fifth reversing valve 14, the sixth reversing valve 15 and the seventh reversing valve 16 are all in the left position. The hydraulic oil enters the rod cavity of the feeding oil cylinder 8 through the third reversing valve 11, the sixth reversing valve 15 and the seventh reversing valve 16 to push the feeding oil cylinder 8 to retract, so as to perform maintenance on the feeding mechanism.

[0097] When in the up-maintenance mode of the scraping slide mechanism, the third reversing valve 11 is in the right position, the fourth reversing valve 13, the sixth reversing valve 15 and the seventh reversing valve 16 are all in the right position, the fifth reversing valve 14 and the eighth reversing valve 17 are both in the left position. The hydraulic oil enters the rodless cavity of the slide cylinder 12 through the third reversing valve 11, the sixth reversing valve 15 and the seventh reversing valve 16. The slide cylinder 12 extends under the push of the hydraulic oil, so that the scraping slide mechanism can be maintained.

[0098] When in the down-maintenance mode of the scraping slide mechanism, the third reversing valve 11 is in the left position, the fourth reversing valve 13, the sixth reversing valve 15 and the seventh reversing valve 16 are all in the right position, the fifth reversing valve 14 and the eighth reversing valve 17 are both in the left position. The hydraulic oil enters the rod cavity of the slide cylinder 12 through the third reversing valve 11 and the fourth reversing valve 13. The slide cylinder 12 retracts under the push of the hydraulic oil, so that the scraping slide mechanism can be maintained.

[0099] Refer to Figure 3 To optimize the above technical solution, the control system of the self-loading and unloading garbage truck of the present invention further includes a controller 9. The controller 9 controls the third reversing valve 11, the fourth reversing valve 13, the fifth reversing valve 14, the sixth reversing valve 15, the seventh reversing valve 16 and the eighth reversing valve 17 to operate in the feeding mode, the up-maintenance mode of the feeding mechanism, the down-maintenance mode of the feeding mechanism, the up-maintenance mode of the scraping slide mechanism or the down-maintenance mode of the scraping slide mechanism. It should be noted that the above controller 9 can be the controller 9 in the original control system of the self-loading and unloading garbage truck, or can be an additionally provided controller 9. As long as it can achieve the control of the above reversing valves.

[0100] When in the feeding mode, the controller 9 controls the electromagnet DT2 of the third reversing valve 11 to be energized, and the fourth reversing valve 13 of the B reversing valve, the seventh reversing valve 16 of the E reversing valve, and the eighth reversing valve 17 to be energized simultaneously. The third reversing valve 11 switches to the right position, and the fourth reversing valve 13 of the B reversing valve, the seventh reversing valve 16 of the E reversing valve, and the eighth reversing valve 17 all switch to the right position. At this time, the rodless cavity of the feeding oil cylinder 8 is connected to the rodless cavity of the slide plate oil cylinder 12 through the seventh reversing valve 16 of the E reversing valve and the eighth reversing valve 17. The rod cavity of the slide plate oil cylinder 12 is connected to the fuel tank through the fourth reversing valve 13 of the B reversing valve and the third reversing valve 11. The hydraulic oil enters the rodless cavity of the feeding oil cylinder 8 through the third reversing valve 11 to push the feeding oil cylinder 8 to extend for feeding operation. The hydraulic oil in the rod cavity of the feeding oil cylinder 8 enters the rodless cavity of the slide plate oil cylinder 12 through the eighth reversing valve 17 and the seventh reversing valve 16 of the E reversing valve and pushes the slide plate oil cylinder 12 to extend to compress and push the garbage in the garbage bin into the garbage bin to reserve a loading space for the garbage being fed. When the garbage bin is not full, the reaction force F of the garbage in the garbage bin on the slide plate oil cylinder 12 is less than the set working pressure of the system, and the upper oil cylinder 8 continues to perform the feeding operation under the push of the hydraulic oil. The slide plate oil cylinder 12 continues to compress and push the garbage into the garbage bin to reserve a loading space for the garbage being fed. When the garbage bin is full, the reaction force F of the garbage in the garbage bin on the slide plate oil cylinder 12 is greater than or equal to the set working pressure of the system, and the hydraulic oil is not enough to continue to push the feeding oil cylinder 8 for feeding operation. The feeding operation stops, and the feeding operation stops automatically when the garbage bin is full.

[0101] When in the up maintenance mode of the feeding mechanism and the feeding oil cylinder 8 needs to act alone: the controller 9 controls the electromagnet DT2 of the third reversing valve 11, the eighth reversing valve 17, and the fifth reversing valve 14 to be energized. At this time, the rod cavity of the feeding oil cylinder 8 is connected to the fuel tank through the eighth reversing valve 17, the fifth reversing valve 14, and the third reversing valve 11. The hydraulic oil enters the rodless cavity of the feeding oil cylinder 8 through the third reversing valve 11 to push the feeding oil cylinder 8 to extend.

[0102] When in the down maintenance mode of the feeding mechanism, the controller 9 controls the electromagnet DT1 of the third reversing valve 11, the fifth reversing valve 14, and the eighth reversing valve 17 to be energized. At this time, the rod cavity of the feeding oil cylinder 8 is connected to the hydraulic oil source through the eighth reversing valve 17, the fifth reversing valve 14, and the third reversing valve 11. The rodless cavity of the feeding oil cylinder 8 is connected to the fuel tank through the third reversing valve 11. The hydraulic oil enters the rod cavity of the feeding oil cylinder 8 to push the feeding oil cylinder 8 to retract.

[0103] When the scraper slide mechanism is in the upward maintenance mode, when the slide cylinder 12 needs to act alone: ​​the controller 9 controls the electromagnet DT2 of the third reversing valve 11, the fourth reversing valve 13, the seventh reversing valve 16, and the sixth reversing valve 15 to be energized, the rod chamber of the slide cylinder 12 is connected with the oil tank through the fourth reversing valve 13 and the third reversing valve 11, and the rodless chamber of the slide cylinder 12 is connected with the hydraulic oil source through the seventh reversing valve 16, the sixth reversing valve 15 and the third reversing valve 11, and the slide cylinder 12 is extended under the push of the hydraulic oil.

[0104] When the scraper slide mechanism is in the downward maintenance mode, the controller 9 controls the electromagnet DT1 of the third reversing valve 11, the fourth reversing valve 13, the seventh reversing valve 16, and the sixth reversing valve 15 to be energized, and the rod chamber of the slide cylinder 12 is connected with the hydraulic oil source through the fourth reversing valve 13 and the third reversing valve 11, and the rodless chamber of the slide cylinder 12 is connected with the oil tank through the seventh reversing valve 16, the sixth reversing valve 15 and the third reversing valve 11, and the slide cylinder 12 retracts under the push of the hydraulic oil.

[0105] Combination Figure 2 , see Figure 6 Some embodiments of the self-loading and unloading garbage truck control system of the present invention also include a scraper cylinder and a fourth valve group, wherein the piston rod of the scraper cylinder is connected to the scraper plate mechanism and drives the scraper plate mechanism to perform the scraping operation; the fourth valve group is connected to the scraper cylinder through a pipeline.

[0106] In some embodiments of the present invention, the fourth valve group includes a ninth reversing valve 19 and a collecting valve 20, wherein: the A port of the ninth reversing valve 19 is connected to the first inlet of the collecting valve 20, the B port of the ninth reversing valve 19 is connected to the second inlet of the collecting valve 20, the P port of the ninth reversing valve 19 is connected to the A port of the second reversing valve 10, and the T port of the ninth reversing valve 19 is connected to the B port of the second reversing valve 10; when the ninth reversing valve 19 is in the left position, the ninth reversing valve The P port of the ninth reversing valve 19 is connected with the A port of the ninth reversing valve 19, and the T port of the ninth reversing valve 19 is connected with the B port of the ninth reversing valve 19; when the ninth reversing valve 19 is in the right position, the P port of the ninth reversing valve 19 is connected with the B port of the ninth reversing valve 19, and the T port of the ninth reversing valve 19 is connected with the A port of the ninth reversing valve 19; the first outlet of the collecting valve 20 is connected with the rod chamber of the scraper cylinder, and the second outlet of the collecting valve 20 is connected with the rodless chamber of the scraper cylinder.

[0107] When the scraper cylinder is in the scraper mode, the second reversing valve 10 is in the left position and the ninth reversing valve 19 is in the left position. After the scraping is completed, the ninth reversing valve 19 is in the right position.

[0108] In some embodiments of the present invention, a controller is further included, and the controller controls each valve group to be opened or closed. The above-mentioned controller can be additionally provided with a controller, or the function of the controller provided by the self-loading and unloading garbage truck can be expanded.

[0109] An embodiment of the present invention also discloses a self-loading and unloading garbage truck, which includes a garbage bin, a scraping plate mechanism, a feeding mechanism and a support leg mechanism. The self-loading and unloading garbage truck applies the self-loading and unloading garbage truck control system as described in any one of the above. Since the above self-loading and unloading garbage truck control system has the above beneficial effects, the self-loading and unloading garbage truck applying the self-loading and unloading garbage truck control system also has corresponding effects, which will not be elaborated here.

[0110] It should be noted that for the convenience of description, only parts related to the relevant invention are shown in the drawings. Without conflict, the embodiments in the present invention and the features in the embodiments can be combined with each other.

[0111] It should be understood that the "system", "device", "unit" and / or "module" used in the present invention is a method for distinguishing different components, elements, parts, portions or assemblies at different levels. However, if other words can achieve the same purpose, the word can be replaced by other expressions.

[0112] As shown in the present invention and the claims, unless the context clearly indicates an exception, words such as "a", "an", "one" and / or "the" are not specifically singular and may also include the plural. Generally speaking, the terms "comprising" and "including" only indicate the inclusion of the clearly identified steps and elements, and these steps and elements do not constitute an exclusive list. The method or device may also include other steps or elements. An element defined by the statement "including one..." does not exclude the existence of another identical element in the process, method, commodity or device including the element.

[0113] Among them, in the description of the embodiments of the present invention, unless otherwise specified, " / " means "or". For example, A / B may mean A or B; the "and / or" herein is only a description of the association relationship of the associated objects, indicating that there can be three relationships. For example, A and / or B can mean: A exists alone, A and B exist simultaneously, and B exists alone. In addition, in the description of the embodiments of the present invention, "a plurality of" means two or more than two.

[0114] Hereinafter, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features.

[0115] In the present invention, flowcharts are used to illustrate the operations performed by the system according to the embodiments of the present invention. It should be understood that the previous or subsequent operations are not necessarily executed precisely in sequence. On the contrary, the steps can be processed in reverse order or simultaneously. At the same time, other operations can also be added to these processes, or one or more steps can be removed from these processes.

[0116] The above description is only for the preferred embodiments of the present invention and the explanation of the applied technical principles, and is not intended to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. The scope of the invention involved in the present invention is not limited to the technical solutions formed by the specific combination of the above technical features, and should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the above inventive concept. For example, the technical solutions formed by mutually replacing the above features with the (but not limited to) technical features having similar functions disclosed in the present invention.

Claims

1. A self-loading and unloading garbage truck control system, characterized in that, It includes a lifting oil cylinder, outrigger oil cylinders and a first valve group. Among them, the piston rod of the lifting oil cylinder is connected to a lifting mechanism to drive the lifting mechanism to perform a lifting operation. The outrigger oil cylinders are used to drive the outriggers to perform a supporting operation. The first valve group is communicated with the lifting oil cylinder or the outrigger oil cylinders through pipelines. When the piston rod of the outrigger oil cylinder moves to a first preset position, the outriggers are in place for supporting, and hydraulic oil starts to enter the rodless cavity of the lifting oil cylinder. When the piston rod of the lifting oil cylinder moves to a second preset position, the lifting mechanism is in place for resetting, and hydraulic oil starts to enter the rod chamber of the outrigger oil cylinder; The first valve group includes a first reversing valve, a first pilot-operated check valve, a second pilot-operated check valve, a third pilot-operated check valve and a balance valve, where: The A port of the first reversing valve is communicated with the inlet of the first pilot-operated check valve, and the B port of the first reversing valve is communicated with the rod chamber of the lifting oil cylinder. When the first reversing valve is in the left position, the P port and the A port of the first reversing valve are conducted, and the T port and the B port of the first reversing valve are conducted. When the first reversing valve is in the right position, the P port and the B port of the first reversing valve are conducted, and the T port and the A port of the first reversing valve are conducted; The outlet of the first pilot-operated check valve is communicated with the rodless cavity of the outrigger oil cylinder, and the pilot port of the first pilot-operated check valve is communicated with the B port of the first reversing valve; The inlet of the second pilot-operated check valve is communicated with the K port of the outrigger oil cylinder, the outlet of the second pilot-operated check valve is communicated with the rod chamber of the lifting oil cylinder, and the pilot port of the second pilot-operated check valve is communicated with the M port of the lifting oil cylinder; The inlet of the third pilot-operated check valve is communicated with the inlet of the balance valve, the outlet of the third pilot-operated check valve is communicated with the L port of the outrigger oil cylinder, and the pilot port of the third pilot-operated check valve is communicated with the outlet of the first pilot-operated check valve; The outlet of the balance valve is communicated with the N port of the lifting oil cylinder.

2. The self-loading and unloading garbage truck control system according to claim 1, characterized in that, The outrigger oil cylinder is provided with a K port and an L port, and the first preset position is between the K port and the L port; The lifting oil cylinder is provided with an M port and an N port, and the second preset position is between the M port and the N port.

3. The self-loading and unloading garbage truck control system according to claim 1, characterized in that, It further includes a loading oil cylinder and a second valve group. The piston rod of the loading oil cylinder is connected to a loading mechanism to drive the loading mechanism to perform a loading mode. The second valve group is communicated with the loading oil cylinder or the lifting oil cylinder through pipelines. The second valve group operates in cooperation so that only one of the rodless cavity of the loading oil cylinder and the rodless cavity of the lifting oil cylinder enters hydraulic oil.

4. The self-loading and unloading garbage truck control system according to claim 3, characterized in that, The second valve group includes a second reversing valve, a third reversing valve and a relief valve, where: The A port of the second reversing valve is communicated with the P port of the third reversing valve, the B port of the second reversing valve is communicated with the P port of the first reversing valve, the P port of the second reversing valve is communicated with an oil pump, and the T port of the second reversing valve is communicated with a fuel tank. When the second reversing valve is in the left position, the P port and the A port of the second reversing valve are conducted, and the T port and the B port of the second reversing valve are conducted. When the second reversing valve is in the right position, the P port and the B port of the second reversing valve are conducted, and the T port and the A port of the second reversing valve are conducted; The T port of the third reversing valve is communicated with the T port of the first reversing valve. The A port of the third reversing valve is communicated with the rodless cavity of the feeding oil cylinder through a pipeline. The B port of the third reversing valve is communicated with the rodless cavity of the feeding oil cylinder. When the third reversing valve is in the left position, the P port and the A port of the third reversing valve are conducted, and the T port and the B port of the third reversing valve are conducted. When the third reversing valve is in the right position, the P port and the B port of the third reversing valve are conducted, and the T port and the A port of the third reversing valve are conducted. The P port of the relief valve is communicated with the P port of the second reversing valve, and the T port of the relief valve is communicated with the T port of the second reversing valve.

5. The self-loading and unloading garbage truck control system according to claim 4, characterized in that, When in the feeding mode, the second reversing valve is in the left position and the third reversing valve is in the right position. When the feeding is completed, the third reversing valve is in the left position. When in the lifting mode, the second reversing valve is in the right position and the first reversing valve is in the right position. When the lifting is completed, the first reversing valve is in the left position.

6. The self-loading and unloading garbage truck control system according to claim 4, characterized in that, It further includes a slide plate oil cylinder and a third valve group. Wherein, the piston rod of the slide plate oil cylinder is connected to the scraping plate mechanism to drive the scraping plate mechanism to perform compression operation. The third valve group is communicated with the slide plate oil cylinder or the feeding oil cylinder through a pipeline. When the oil pressure in the rodless cavity of the slide plate oil cylinder reaches the threshold value, the oil pressure in the rodless cavity of the feeding oil cylinder is greater than or equal to the oil pressure in the rod cavity of the feeding oil cylinder.

7. The self-loading and unloading garbage truck control system according to claim 6, characterized in that, The third valve group includes a fourth reversing valve, a fifth reversing valve, a sixth reversing valve, a seventh reversing valve and an eighth reversing valve, wherein: The oil inlet of the fourth reversing valve is communicated with the A port of the third reversing valve, and the oil outlet of the fourth reversing valve is communicated with the rod cavity of the slide plate oil cylinder. When the fourth reversing valve is in the left position, the oil inlet and the oil outlet of the fourth reversing valve are cut off. When the fourth reversing valve is in the right position, the oil inlet and the oil outlet of the fourth reversing valve are conducted. The oil inlet of the fifth reversing valve is communicated with the A port of the third reversing valve, the oil outlet of the fifth reversing valve is communicated with the oil inlet of the seventh reversing valve, and the oil inlet and the oil outlet of the fifth reversing valve are cut off. When the fifth reversing valve is in the right position, the oil inlet and the oil outlet of the fifth reversing valve are conducted. The oil inlet of the sixth reversing valve is communicated with the B port of the third reversing valve, and the oil outlet of the sixth reversing valve, the oil inlet of the seventh reversing valve and the oil inlet of the eighth reversing valve are communicated. When the sixth reversing valve is in the left position, the oil inlet and the oil outlet of the sixth reversing valve are cut off. When the sixth reversing valve is in the right position, the oil inlet and the oil outlet of the sixth reversing valve are conducted. The oil outlet of the seventh reversing valve is communicated with the rodless cavity of the slide plate oil cylinder. When the seventh reversing valve is in the left position, the oil inlet and the oil outlet of the seventh reversing valve are cut off. When the seventh reversing valve is in the right position, the oil inlet and the oil outlet of the seventh reversing valve are conducted. The oil outlet of the eighth reversing valve is communicated with the rod chamber of the feeding oil cylinder; when the eighth reversing valve is in the left position, the oil inlet and the oil outlet of the eighth reversing valve are cut off; when the eighth reversing valve is in the right position, the oil inlet and the oil outlet of the eighth reversing valve are conducted.

8. The self-loading and unloading garbage truck control system according to claim 7, characterized in that, When in the feeding mode, the second reversing valve is in the left position, the third reversing valve is in the right position, the fourth reversing valve, the seventh reversing valve and the eighth reversing valve are all in the right position, and the fifth reversing valve and the sixth reversing valve are both in the left position; When in the maintenance mode of the upward movement of the feeding mechanism, the third reversing valve is in the right position, the fifth reversing valve and the eighth reversing valve are both in the right position, and the fifth reversing valve, the sixth reversing valve and the seventh reversing valve are all in the left position; When in the maintenance mode of the downward movement of the feeding mechanism, the third reversing valve is in the left position, the fifth reversing valve and the eighth reversing valve are both in the right position, and the fifth reversing valve, the sixth reversing valve and the seventh reversing valve are all in the left position; When in the maintenance mode of the upward movement of the scraping plate mechanism, the third reversing valve is in the right position, the fourth reversing valve, the sixth reversing valve and the seventh reversing valve are all in the right position, and the fifth reversing valve and the eighth reversing valve are both in the left position; When in the maintenance mode of the downward movement of the scraping plate mechanism, the third reversing valve is in the left position, the fourth reversing valve, the sixth reversing valve and the seventh reversing valve are all in the right position, and the fifth reversing valve and the eighth reversing valve are both in the left position.

9. The self-loading and unloading garbage truck control system according to claim 4, characterized in that, It further includes a scraping plate oil cylinder and a fourth valve group. Among them, the piston rod of the scraping plate oil cylinder is connected to the scraping plate mechanism and drives the scraping plate mechanism to perform the scraping operation; the fourth valve group is communicated with the scraping plate oil cylinder through a pipeline.

10. The self-loading and unloading garbage truck control system according to claim 9, characterized in that, The fourth valve group includes a ninth reversing valve and a manifold valve, where: The A port of the ninth reversing valve is communicated with the first inlet of the manifold valve, the B port of the ninth reversing valve is communicated with the second inlet of the manifold valve, the P port of the ninth reversing valve is communicated with the A port of the second reversing valve, and the T port of the ninth reversing valve is communicated with the B port of the second reversing valve; when the ninth reversing valve is in the left position, the P port of the ninth reversing valve is conducted with the A port of the ninth reversing valve, and the T port of the ninth reversing valve is conducted with the B port of the ninth reversing valve; when the ninth reversing valve is in the right position, the P port of the ninth reversing valve is conducted with the B port of the ninth reversing valve, and the T port of the ninth reversing valve is conducted with the A port of the ninth reversing valve; The first outlet of the manifold valve is communicated with the rod chamber of the scraping plate oil cylinder, and the second outlet of the manifold valve is communicated with the rodless chamber of the scraping plate oil cylinder.

11. The self-loading and unloading garbage truck control system according to claim 10, characterized in that, When the scraping plate oil cylinder is in the scraping mode, the second reversing valve is in the left position and the ninth reversing valve is in the left position. After the scraping is completed, the ninth reversing valve is in the right position.

12. The self-loading and unloading garbage truck control system according to claim 9, characterized in that, It further includes a controller, and the controller controls the opening or closing of each valve group.

13. A self-loading and unloading garbage truck, characterized in that, Apply the self-loading and unloading garbage truck control system according to any one of claims 1 to 12.

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