Hydraulic system device of small high-position self-discharging pure electric garbage truck

Abstract

The utility model relates to the field of environment-friendly mechanical devices, in particular to a hydraulic system device of a small high-position self-discharging pure electric garbage truck, which comprises an auxiliary frame, a garbage can is arranged on the auxiliary frame, a power unit assembly and a pressure relay are mounted at the front end of the auxiliary frame, and a proximity switch is mounted on a support at the front end of the auxiliary frame. A controller and a wireless remote controller are installed at the left end of the auxiliary frame, the controller is in signal connection with the proximity switch, the controller is connected with the proximity switch, the pressure relay and the power unit assembly through wire harnesses, a whole vehicle supporting oil cylinder is arranged at the rear end of the auxiliary frame, and the pressure relay is connected with the power unit assembly and the whole vehicle supporting oil cylinder. The problems that an engine provides power for garbage dumping of a garbage truck on the market at the present stage, daily operation and maintenance cost is relatively high, an operator needs to operate in a cab for garbage dumping operation, garbage dumping cannot be observed, and garbage dumping is incomplete are solved.

Description

Technical Field

[0001] This utility model relates to the field of environmental protection machinery and equipment, specifically to a hydraulic system device for a small high-level self-unloading pure electric garbage truck. Background Technology

[0002] Small self-dumping garbage trucks are specialized vehicles modified from tricycles or mini-trucks by adding subframes, cargo boxes, hydraulic systems, etc. They are used specifically for collecting loose household waste along streets in narrow areas. However, due to the small loading capacity and low waste handling efficiency of small vehicles, there is a need for high-level self-dumping garbage trucks to unload garbage into the compactor of a garbage truck. However, most garbage trucks on the market are currently fuel-powered, with their movement and dumping powered by the engine, resulting in relatively high daily operating and maintenance costs. Moreover, the garbage dumping operation requires operators to operate from the cab, making it impossible to observe the dumping process, which can lead to incomplete dumping and certain safety hazards.

[0003] At present, a hydraulic system device for a small, high-position self-unloading pure electric garbage truck is proposed to solve the above-mentioned problems. Utility Model Content

[0004] The purpose of this utility model is to provide a hydraulic system device for a small, high-position self-unloading pure electric garbage truck. This addresses the problem that most garbage trucks on the market are currently fuel-powered, with their movement and garbage dumping powered by an engine, resulting in relatively high daily operation and maintenance costs. Furthermore, garbage dumping operations require operators to be in the cab, making it impossible to observe the garbage dumping process, leading to incomplete garbage dumping and certain safety hazards.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0006] A hydraulic system for a small, high-position self-unloading pure electric garbage truck is disclosed. The garbage truck includes a subframe, a proximity switch mounted on a bracket at the front end of the subframe, a power unit assembly and a pressure relay mounted at the front end of the subframe, a controller and a wireless remote controller mounted on the left end of the subframe, the wireless remote controller and the controller being signal-connected, and the controller being connected to the proximity switch, pressure relay and power unit assembly via a wiring harness, receiving commands from the wireless remote controller according to a preset program. The system also includes a vehicle support cylinder mounted at the rear end of the subframe, and the pressure relay being connected to the power unit assembly and the vehicle support cylinder via connectors and oil pipes, respectively.

[0007] Furthermore, there are two vehicle support cylinders, located on the left and right sides of the subframe, respectively.

[0008] Furthermore, the vehicle support cylinder is equipped with a two-way hydraulic lock on its cylinder body, and the two-way hydraulic lock is connected to the vehicle support cylinder so that the vehicle support cylinder can self-lock.

[0009] Furthermore, a flow divider / combiner valve is installed at the rear end of the subframe. The flow divider / combiner valve has a flow ratio of 1:1. The flow divider / combiner valve is connected to the rodless chamber of the vehicle support cylinder to achieve synchronous extension and retraction of the two vehicle support cylinders.

[0010] Further, it also includes a self-unloading cylinder for the garbage container, the front end of which is connected to the front end of the garbage container, and the rear end is installed on the subframe, which is responsible for lifting and dumping the garbage container.

[0011] Further specifying, the self-unloading cylinder of the container is equipped with a single-acting balance valve, which is connected to the rodless chamber and the rod chamber of the self-unloading cylinder to stabilize the descent speed of the garbage container. There are two self-unloading cylinders and two single-acting balance valves, located on the left and right sides of the subframe, respectively.

[0012] Further specifying, the powertrain unit includes a hydraulic tank, a vehicle support cylinder directional valve, a box unloading cylinder directional valve, a drive motor, and a hydraulic pump. Both the vehicle support cylinder directional valve and the box unloading cylinder directional valve are three-position four-way solenoid directional valves. The drive motor drives the hydraulic pump. The hydraulic pump is connected to the P1 port of the box unloading cylinder directional valve and the P2 port of the vehicle support cylinder directional valve, respectively. The T1 port of the box unloading cylinder directional valve and the vehicle support cylinder directional valve... The T2 port of the hydraulic cylinder reversing valve is connected to the hydraulic oil tank. The A1 port of the box body self-unloading hydraulic cylinder reversing valve is connected to the rodless chamber of the box body self-unloading hydraulic cylinder through a single-acting balance valve, and the B1 port is connected to the rod chamber of the box body self-unloading hydraulic cylinder. The A2 port of the vehicle support hydraulic cylinder reversing valve is connected to the rodless chamber of the vehicle support hydraulic cylinder through a pressure relay and a two-way hydraulic lock. The B2 port of the vehicle support hydraulic cylinder reversing valve is connected to the rod chamber of the vehicle support hydraulic cylinder through a pressure relay and a two-way hydraulic lock.

[0013] Furthermore, an oil suction filter is installed on the oil pipeline between the hydraulic oil tank and the hydraulic pump.

[0014] Furthermore, an overflow valve is installed between the hydraulic pump and the pipeline connecting the vehicle support cylinder reversing valve and the box unloading cylinder reversing valve, and between the pipeline and the hydraulic oil tank. The overflow valve limits the maximum working pressure of the system.

[0015] The advantages of this utility model over the current technology are as follows:

[0016] By using a power unit assembly, the problem of the hydraulic pump's power source for pure electric vehicles is solved, saving installation space and ensuring the usability of small vehicles. By using a flow divider and combiner valve, the problem of asynchronous extension of the left and right vehicle support cylinders is solved, shortening the extension time and improving safety. By using a pressure relay, the vehicle support cylinders must extend before dumping garbage, completely eliminating the possibility of user misoperation from the product design principle. By using a proximity switch, the vehicle support cylinders cannot retract before the garbage bin is fully lowered, ensuring the safety of the garbage dumping process. By using a wireless remote control, operators can observe the garbage dumping situation from outside the vehicle, ensuring complete and safe garbage dumping, thereby improving product performance and competitiveness. Attached Figure Description

[0017] Figure 1 This is a front view schematic diagram of the present invention;

[0018] Figure 2 This is a schematic diagram of the hydraulic device of this utility model.

[0019] The markings in the diagram correspond to the following: 1-Subframe, 2-Garbage bin, 3-Proximity switch, 4-Power unit assembly, 5-Pressure relay, 6-Controller, 7-Wireless remote control, 8-Vehicle support cylinder, 9-Two-way hydraulic lock, 10-Diverter valve, 11-Body unloading cylinder, 12-Single-acting balance valve, 41-Hydraulic oil tank, 42-Vehicle support cylinder directional valve, 43-Body unloading cylinder directional valve, 44-Drive motor, 45-Hydraulic pump, 46-Suction filter, 47-Relief valve. Detailed Implementation

[0020] To enable those skilled in the art to better understand the technical solution of this utility model, the technical solution of this utility model will be further described below in conjunction with the accompanying drawings and embodiments. Example

[0021] like Figure 1 and Figure 2As shown, a hydraulic system device for a small, high-position self-unloading pure electric garbage truck is disclosed. The garbage truck includes a subframe 1, on which a garbage bin 2 is mounted. A proximity switch 3 is installed on a bracket at the front end of the subframe 1 via locking bolts. A power unit assembly 4 and a pressure relay 5 are installed at the front end of the subframe. A controller 6 and a wireless remote controller 7 are installed on the left end of the subframe 1. The controller 6 is connected to the proximity switch 3, pressure relay 5, and power unit assembly 4 via a wiring harness. According to a preset program, it receives commands from the wireless remote controller 7. The wireless remote controller 7 is connected to the controller 6 via a wireless communication protocol, supporting a wireless control range of 50 meters. This ensures that the operator can move around and observe freely during garbage unloading. When not in use, it can be stored in the cab. The system also includes two vehicle support cylinders 8, which are bolted to the rear end of the subframe 1. The vehicle support cylinders 8 are located on the subframe. The left and right ends of 1 are responsible for maintaining the stability of the vehicle during the garbage dumping process. The pressure relay 5 is connected to the power unit assembly 4 and the vehicle support cylinder 8 through a three-way connector and hydraulic oil pipe, respectively. It is responsible for detecting the pressure of the vehicle support cylinder system and providing an electrical signal to the controller 6. When the pressure in the rodless chamber of the vehicle support cylinder 8 reaches the set 8MPa, the extension button of the vehicle support cylinder 8 on the wireless remote controller 7 is de-energized, and the vehicle support cylinder 8 stops extending. At the same time, the lifting button of the container on the wireless remote controller 7 is energized. Logically, this ensures that the garbage container 2 cannot be lifted before the vehicle support cylinder 8 is fully extended. When the pressure in the rod chamber of the vehicle support cylinder 8 reaches the set 8MPa, the vehicle support cylinder 8 retracts into place, the retraction button of the vehicle support cylinder on the wireless remote controller 7 is de-energized, and the vehicle support cylinder 8 stops retracting. The proximity switch 3 is used to detect whether the garbage container 2 is in an unlifted state and to provide an electrical signal to the controller 6. When the distance between the proximity switch 3 and the garbage bin 2 is greater than 5mm, the retraction button of the vehicle support cylinder on the wireless remote control 7 will be de-energized to prevent the vehicle support cylinder 8 from retracting before the garbage bin 2 is lowered, thus logically ensuring the safety of garbage dumping.

[0022] A two-way hydraulic lock 9 is welded onto the cylinder body of the vehicle support cylinder 8. The two-way hydraulic lock 9 is connected to the rod chamber and rodless chamber of the vehicle support cylinder 8 to ensure that the vehicle support cylinder 8 is not disturbed by external factors when it is not working, thus playing a locking role. A flow divider valve 10 is also installed at the rear end of the subframe 1. The flow divider valve 10 has a flow ratio of 1:1 and is connected to the rodless chamber of the vehicle support cylinder 8 to achieve synchronous extension and retraction of the two vehicle support cylinders 8.

[0023] It also includes a container self-unloading cylinder 11. The front and rear ends of the container self-unloading cylinder 11 are hinged. The front end is connected to the front end of the garbage container 2 via a pin, and the rear end is fixed to the subframe 1 via a pin. It is responsible for lifting and tilting the garbage container. At the same time, a single-acting balance valve 12 is welded to the cylinder body of the container self-unloading cylinder 11. The single-acting balance valve 12 is connected to the rodless chamber and the rod chamber of the container self-unloading cylinder 11. It is responsible for ensuring the stable descent speed of the garbage container 2 and preventing the garbage container 2 from falling too quickly and damaging the subframe 1 or other components.

[0024] The power unit assembly 4 provides power to the entire hydraulic system. The power unit assembly 4 includes a hydraulic oil tank 41, a vehicle support cylinder directional valve 42, a box unloading cylinder directional valve 43, a drive motor 44, and a hydraulic pump 45. Both the vehicle support cylinder directional valve 42 and the box unloading cylinder directional valve 43 are three-position four-way directional valves. The drive motor 44 drives the hydraulic pump 45. The hydraulic pump 45 is connected to the P1 port of the box unloading cylinder directional valve 43 and the P2 port of the vehicle support cylinder directional valve 42. The T1 port of the box unloading cylinder directional valve 43 and the T2 port of the vehicle support cylinder directional valve 42 are both connected to the hydraulic oil tank 41. The A1 port of the box unloading cylinder directional valve 43 is balanced by a single-acting valve. Valve 12 is connected to the rodless chamber of the self-unloading cylinder 11 of the box body, and port B1 is connected to the rod chamber of the self-unloading cylinder 11 of the box body. Port A2 of the reversing valve 42 of the vehicle support cylinder is connected to the rodless chamber of the vehicle support cylinder 8 through pressure relay 5 and two-way hydraulic lock 9. Port B2 of the reversing valve 42 of the vehicle support cylinder is connected to the rod chamber of the vehicle support cylinder 8 through pressure relay 5 and two-way hydraulic lock 9. An oil suction filter 46 is installed on the oil pipeline between the hydraulic oil tank 41 and the hydraulic pump 45. An overflow valve 47 is installed between the pipeline between the hydraulic pump 45 and the reversing valve 42 of the vehicle support cylinder and the reversing valve 43 of the self-unloading cylinder of the box body and the hydraulic oil tank 41. The overflow valve 47 limits the maximum working pressure of the system.

[0025] When the valve core of the vehicle support cylinder reversing valve 42 is in the neutral position, oil ports A2 and B2 are connected to T2, ensuring that the rod chamber and rodless chamber of the vehicle support cylinder 8 are connected to the hydraulic system return oil passage for pressure relief when in the neutral position. When the electromagnet 3YA is energized, the vehicle support cylinder reversing valve 42 operates in the left position, P2 and A2 are connected, and T2 and B2 are connected. High-pressure oil enters the bidirectional hydraulic lock 9 through port A2 and pressure relay 5, opening its left-position check valve to enter the rodless chamber of the vehicle support cylinder 8. At the same time, the right-position check valve of the bidirectional hydraulic lock 9 is opened, and the low-pressure oil in the rod chamber enters the right-position check valve of the bidirectional hydraulic lock 9. The valves B2 and T2 return to the hydraulic oil tank 41, completing the extension of the vehicle support cylinder 8. When the solenoid valve 4YA is energized, the vehicle support cylinder reversing valve 42 operates in the right position, P2 and B2 are connected, and T2 and A2 are connected. High-pressure oil enters the bidirectional hydraulic lock 9 through port B2 and pressure relay 5, opening its right-position check valve to enter the rod chamber of the vehicle support cylinder 8. At the same time, the left-position check valve of the bidirectional hydraulic lock 9 is opened, and the low-pressure oil in the rodless chamber returns to the hydraulic oil tank 41 through the left-position check valve of the bidirectional hydraulic lock 9, port A2, and port T2. When the valve core of the solenoid reversing valve 43 of the tank self-unloading cylinder is in the neutral position, the oil... When ports P1, T1, A1, and B1 are not connected, the self-unloading cylinder 11 maintains internal pressure. When electromagnet 1YA is energized, the self-unloading cylinder directional valve 43 operates in the left position, connecting P1 and A1, and T1 and B1. High-pressure oil flows through ports P1 and A1, opening the left check valve of the single-acting balance valve 12 and entering the rodless chamber of the self-unloading cylinder 11. Low-pressure oil in the rod chamber returns to the hydraulic oil tank 41 through ports B1 and T1. When solenoid valve 2YA is energized, the self-unloading cylinder directional valve 42 operates in the right position, connecting P1 and B1, and T1 and A1. Hydraulic oil flows through ports P1, B1, A1, and B1. The hydraulic oil in the rod chamber of the self-unloading cylinder 11 enters through port A1 and port T1. The hydraulic oil in the rodless chamber cannot return to the hydraulic oil tank 41 through the left check valve and right relief valve of the single-acting balance valve 12. This causes the hydraulic oil pressure in the rod chamber to rise. When the pressure reaches the set pressure of 3MPa of the single-acting balance valve 12, the relief valve 47 gradually opens. The hydraulic oil in the rodless chamber returns to the hydraulic oil tank 41 through port A1 and port T1. The hydraulic oil pressure in the rod chamber decreases. The opening of the relief valve 47 gradually narrows, and the hydraulic oil pressure in the rod chamber gradually increases. This process repeats to ensure that the cylinder retracts at a certain speed.

[0026] The operating procedures applicable to this hydraulic system are as follows:

[0027] S1. The entire vehicle is powered on;

[0028] S2. Pull out the emergency stop button on the wireless remote control 7;

[0029] S3. Press and hold the power button on the wireless remote control 7 for more than 3 seconds and then release it. The button on the vehicle support cylinder extension on the wireless remote control 7 will be powered.

[0030] S4. Press the vehicle support cylinder extension button on the wireless remote control 7 once. The vehicle support cylinder 8 will continue to extend. At the same time, the vehicle support cylinder 8 retraction button on the wireless remote control 7 will be powered.

[0031] S5, pressure relay 5 detects whether the hydraulic oil pressure reaches 8MPa. If it does not reach 8MPa, the vehicle support cylinder 8 continues to extend. When it reaches 8MPa, the vehicle support cylinder extension button on the wireless remote control 7 is de-energized, the vehicle support cylinder 8 stops extending, and at the same time, the housing lifting button on the wireless remote control 7 is energized.

[0032] S6. Press and hold the bin lifting button on the wireless remote control 7 to lift the garbage bin 2. At the same time, the bin retraction button on the wireless remote control 7 is energized. The proximity switch 3 detects that the distance to the bin exceeds 5mm, and the vehicle support cylinder retraction button on the wireless remote control 7 is de-energized.

[0033] S7. Check if the trash can 2 has reached the required dumping angle. If it has, release the lifting button on the wireless remote control 7. If it has not reached the required dumping angle, release the lifting button on the wireless remote control 7 when the maximum dumping angle is reached.

[0034] S8. Press and hold the lowering button on the wireless remote control 7. The trash can 2 will descend. The proximity switch 3 will detect that the distance between the trash can and the body is less than 5mm. The retraction button of the vehicle support cylinder on the wireless remote control 7 will be energized.

[0035] S9. Trash can 2 has completely fallen back down. Release the upper body lowering button on the wireless remote control 7.

[0036] S10. Press the vehicle support cylinder retraction button on the wireless remote control 7 once. The vehicle support cylinder 8 will retract. At the same time, the box lifting button on the wireless remote control 7 will be de-energized.

[0037] S11. Pressure relay 5 detects whether the hydraulic oil pressure reaches 8MPa. If it does not reach 8MPa, the vehicle support cylinder 8 continues to retract. If it reaches 8MPa, the retraction button of the vehicle support cylinder 8 on the wireless remote control 7 is de-energized, and the vehicle support cylinder 8 stops retracting.

[0038] S12. Press the emergency stop switch.

[0039] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the actual state shown, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component 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 utility model.

[0040] The above provides a detailed description of the hydraulic system for a small, high-position self-unloading pure electric garbage truck provided by this utility model. The description of the specific embodiments is only for the purpose of helping to understand the method and core idea of ​​this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made to this utility model without departing from the present utility model, and these improvements and modifications also fall within the protection scope of the claims of this utility model.

Claims

1. A small high-position self-unloading pure electric garbage truck hydraulic system device, characterized in that: The garbage truck comprises a sub-frame (1), a garbage bin (2) arranged on the sub-frame (1), a proximity switch (3) arranged on a support at the front end of the sub-frame (1), a power unit assembly (4) and a pressure relay (5) arranged at the front end of the sub-frame (1), a controller (6) and a wireless remote controller (7) arranged at the left end of the sub-frame (1), the controller (6) being signal-connected with the proximity switch (3), the controller (6) being connected with the proximity switch (3), the pressure relay (5) and the power unit assembly (4) through a wire harness, and the controller (6) being capable of receiving instructions from the wireless remote controller (7) according to a preset program, and the garbage truck further comprises a whole-vehicle supporting oil cylinder (8) arranged at the rear end of the sub-frame (1), and the pressure relay (5) is connected with the power unit assembly (4) and the whole-vehicle supporting oil cylinder (8) through a joint and an oil pipe.

2. The small high-position self-unloading pure electric garbage truck hydraulic system device according to claim 1, characterized in that: The whole-vehicle supporting oil cylinder (8) is arranged at the left and right sides of the sub-frame (1).

3. The small high-position self-unloading pure electric garbage truck hydraulic system device according to claim 1, characterized in that: A two-way hydraulic lock (9) is arranged on the cylinder body of the whole-vehicle supporting oil cylinder (8), and the two-way hydraulic lock (9) is connected with the whole-vehicle supporting oil cylinder (8) so that the whole-vehicle supporting oil cylinder (8) can be self-locked.

4. The small high-position self-unloading pure electric garbage truck hydraulic system device according to claim 2, characterized in that: A shunt and collecting valve (10) is further arranged at the rear end of the sub-frame (1), the shunt and collecting valve (10) having a shunt ratio of 1:1, the shunt and collecting valve (10) being connected with the rodless cavity of the whole-vehicle supporting oil cylinder (8) so as to realize synchronous extension and retraction of the two whole-vehicle supporting oil cylinders (8).

5. The small high-position self-unloading pure electric garbage truck hydraulic system device according to claim 1, characterized in that: The garbage truck further comprises a bin self-unloading oil cylinder (11), the bin self-unloading oil cylinder (11) being connected with the front end of the garbage bin (2) and being arranged at the rear end of the sub-frame (1), and being responsible for lifting and dumping of the garbage bin (2).

6. The small high-position self-unloading pure electric garbage truck hydraulic system device according to claim 5, characterized in that: A single-acting balance valve (12) is arranged on the cylinder body of the bin self-unloading oil cylinder (11), the single-acting balance valve (12) being connected with the rodless cavity and the rod cavity of the bin self-unloading oil cylinder (11) so as to stabilize the descending speed of the garbage bin (2), and the bin self-unloading oil cylinder (11) and the single-acting balance valve (12) are arranged at the left and right sides of the sub-frame (1).

7. The hydraulic system device of a small high-position self-unloading pure electric garbage truck according to claim 1, characterized in that: The power assembly unit (4) comprises a hydraulic oil tank (41), a whole vehicle supporting oil cylinder reversing valve (42), a tank self-unloading oil cylinder reversing valve (43), a driving motor (44) and a hydraulic pump (45), the whole vehicle supporting oil cylinder reversing valve (42) and the tank self-unloading oil cylinder reversing valve (43) are all three-position four-way electromagnetic reversing valves, the driving motor (44) drives the hydraulic pump (45) to work, the hydraulic pump (45) is respectively connected with the P1 port of the tank self-unloading oil cylinder reversing valve (43) and the P2 port of the whole vehicle supporting oil cylinder reversing valve (42), the T1 port of the tank self-unloading oil cylinder reversing valve (43) and the T2 port of the whole vehicle supporting oil cylinder reversing valve (42) are connected with the hydraulic oil tank (41), the A1 port of the tank self-unloading oil cylinder reversing valve (43) is connected with the rodless cavity of the tank self-unloading oil cylinder (11) through a single-acting balance valve (12), the B1 port is connected with the rod cavity of the tank self-unloading oil cylinder (11), the A2 port of the whole vehicle supporting oil cylinder reversing valve (42) is connected with the rodless cavity of the whole vehicle supporting oil cylinder (8) through a pressure relay (5) and a bidirectional hydraulic lock (9), the B2 port of the whole vehicle supporting oil cylinder (8) reversing valve is connected with the rod cavity of the whole vehicle supporting oil cylinder (8) through the pressure relay (5) and the bidirectional hydraulic lock (9).

8. The hydraulic system device of a small high-position self-unloading pure electric garbage truck according to claim 7, characterized in that: An oil suction filter (46) is arranged on the oil path pipeline between the hydraulic oil tank (41) and the hydraulic pump (45).

9. The hydraulic system device of a small high-position self-unloading pure electric garbage truck according to claim 7, characterized in that: An overflow valve (47) is arranged between the hydraulic pump (45), the whole vehicle supporting oil cylinder reversing valve (42) and the tank self-unloading oil cylinder reversing valve (43) and the hydraulic oil tank (41), the overflow valve (47) limits the maximum working pressure of the system.

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