Small pure electric high-position self-loading and unloading garbage collection vehicle hydraulic system device
Patent Information
- Application Number
- CN202522208589.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-20
- Publication Date
- 2026-08-28
- Estimated Expiration
- 2035-10-20
AI Technical Summary
[0004]本实用新型的目的在于提供一种小型纯电高位自装卸垃圾收集车液压系统装置来解决现阶段操作者在夹紧垃圾桶时未完全夹紧，就举升举升机构，导致垃圾桶掉落，或举升机构未下落到位就举升垃圾箱，或垃圾箱未下落到位就举升举升机构，导致垃圾箱和举升机构之前发生干涉，造成变形甚至报废的问题
[0016] By using a power unit assembly, the power source problem of the hydraulic pump in pure electric vehicles is solved, saving installation space and ensuring the usability of small vehicles. By using a flow divider/combiner valve, the problem of asynchronous extension of the left and right vehicle support cylinders is solved, shortening extension time and improving safety. By using a pressure relay, the vehicle support cylinders are guaranteed to extend before garbage dumping, completely eliminating the possibility of user misoperation from the product design principle. By using a proximity switch, the vehicle support cylinders cannot retract until 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 process from outside the vehicle, ensuring complete and safe garbage dumping, thus improving product performance and competitiveness.
Smart Images
Figure CN224690953U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of environmental protection machinery and devices, specifically to a hydraulic system device for a small pure electric high-position self-loading and unloading garbage collection vehicle. Background Technology
[0002] Currently, high-level self-loading garbage collection vehicles are widely used abroad. In areas with narrow roads, these vehicles collect and transfer garbage, which is then transported to landfills via large compactors or garbage containers. In China, however, high-level self-loading garbage collection vehicles are still in their early stages of development, with most being fuel-powered. This results in noise, pollution, and high operating and maintenance costs. Furthermore, the current loading mechanism is located at the rear of the vehicle, using a lifting mechanism to raise the garbage bins and dump the garbage into the container. However, operators sometimes fail to fully clamp the garbage bins before raising the lifting mechanism, causing the bins to fall. Conversely, the lifting mechanism may not be fully lowered before raising the container, or vice versa, leading to interference between the container and the lifting mechanism, causing deformation or even rendering the vehicle unusable. Some companies post warning signs to remind operators, but this cannot completely prevent such problems.
[0003] In summary, a hydraulic system device for a small, pure electric, high-position self-loading and unloading garbage collection vehicle is proposed to solve the aforementioned problems. Utility Model Content
[0004] The purpose of this utility model is to provide a hydraulic system device for a small pure electric high-position self-loading and unloading garbage collection vehicle to solve the current problems of operators not fully clamping the garbage can before raising the lifting mechanism, causing the garbage can to fall, or raising the garbage container before the lifting mechanism has reached its proper position, or raising the lifting mechanism before the garbage container has reached its proper position, causing interference between the garbage container and the lifting mechanism, resulting in deformation or even scrapping.
[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, pure electric, high-position self-loading and unloading garbage collection truck is characterized in that: the garbage truck includes a sub-frame, on which a garbage bin is mounted; a proximity switch is mounted on a bracket at the front end and a proximity switch is mounted on a bracket at the rear end of the sub-frame; a power unit assembly and a pressure relay are mounted on the front left side of the sub-frame; a lifting arm is mounted on a crossbeam at the rear end of the sub-frame; a fixed frame is mounted on the lower end of the lifting arm; a bin-hanging proximity switch is mounted on the upper end of the fixed frame; a bin-hanging frame is mounted on the lower end; a wireless remote controller and a controller are mounted on the rear left side of the sub-frame; the controller is connected to the bin-hanging proximity switch via the vehicle's wiring harness. The system includes a switch, a feeding proximity switch, a pressure relay, a power unit assembly, and a garbage bin proximity switch. The wireless remote controller is connected to the controller signal via a wireless communication protocol. It also includes a lifting cylinder installed between the subframe and the lifting arm. A tilting cylinder is fixedly installed between the lifting arm and the fixed frame via a pin. A bin-hanging cylinder is fixedly installed between the fixed frame and the bin-hanging frame. The system also includes two vehicle support cylinders, installed at the left and right ends of the subframe respectively. The pressure relay is connected to both the power unit assembly and the vehicle support cylinders.
[0007] 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.
[0008] 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.
[0009] Further, it also includes a container self-unloading cylinder, with the front and rear ends of the container self-unloading cylinder being hinged. The front end is connected to the front end of the garbage container via a pin, and the rear end is fixed to the subframe via a pin, responsible for lifting and dumping the garbage container.
[0010] Furthermore, a single-acting balance valve is welded onto the cylinder body of the self-unloading cylinder of the garbage bin. The single-acting balance valve is connected to the rodless chamber and the rod chamber of the self-unloading cylinder of the garbage bin, and is responsible for ensuring the stable descent speed of the garbage bin.
[0011] Further defined, it includes a lifting one-way sequence valve and a retraction one-way sequence valve, both of which are fixed to the rear end of the subframe. The inlet end of the lifting one-way sequence valve is connected to the rodless chamber of the lifting cylinder via a three-way connector and hydraulic lines, and the outlet end is connected to the rodless chamber of the tilting cylinder.
[0012] Further specifying, the power unit assembly includes a loading cylinder reversing valve, a bucket hook cylinder reversing valve, a vehicle support cylinder reversing valve, a box body self-unloading cylinder reversing valve, and a hydraulic pump. The loading cylinder reversing valve, bucket hook cylinder reversing valve, vehicle support cylinder reversing valve, and box body self-unloading cylinder reversing valve are all three-position four-way reversing valves. The drive motor drives the hydraulic pump. The hydraulic pump is connected to the P1 port of the box body self-unloading cylinder reversing valve, the P2 port of the vehicle support cylinder reversing valve, the P3 port of the bucket hook cylinder reversing valve, and the P4 port of the loading cylinder reversing valve, respectively. It also includes a hydraulic oil tank, which is connected to the T1 port of the box body self-unloading cylinder reversing valve, the T2 port of the vehicle support cylinder reversing valve, the T3 port of the bucket hook cylinder reversing valve, and the T4 port of the loading cylinder reversing valve, respectively. The A1 port of the unloading cylinder reversing valve is connected to the rodless chamber of the self-unloading cylinder of the box body through a single-acting balance valve, and the B1 port is connected to the rod chamber of the self-unloading cylinder of the box body. The A2 port of the vehicle support cylinder reversing valve is connected to the rodless chamber of the vehicle support cylinder through a pressure relay, a flow divider / combiner valve, and a two-way hydraulic lock, and the B2 port is connected to the rod chamber of the vehicle support cylinder through a pressure relay and a two-way hydraulic lock. The A3 port of the hook-lift cylinder reversing valve is connected to the rodless chamber of the hook-lift cylinder, and the B3 port is connected to the rod chamber of the hook-lift cylinder. The A4 port of the loading cylinder reversing valve is connected to the rodless chamber of the lifting cylinder and the rodless chamber of the tilting cylinder via the lifting one-way sequence valve through a three-way connector, and the B4 port is connected to the rod chamber of the tilting cylinder and the rod chamber of the lifting cylinder via the recovery one-way sequence valve through a three-way connector.
[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 on the oil line between the hydraulic pump outlet and the hydraulic oil tank, and the overflow valve is used to limit 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 power source problem of the hydraulic pump in pure electric vehicles is solved, saving installation space and ensuring the usability of small vehicles. By using a flow divider / combiner valve, the problem of asynchronous extension of the left and right vehicle support cylinders is solved, shortening extension time and improving safety. By using a pressure relay, the vehicle support cylinders are guaranteed to extend before garbage dumping, completely eliminating the possibility of user misoperation from the product design principle. By using a proximity switch, the vehicle support cylinders cannot retract until 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 process from outside the vehicle, ensuring complete and safe garbage dumping, thus 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: 1-Subframe, 2-Garbage bin, 3-Garbage bin proximity switch, 4-Loading proximity switch, 5-Power unit assembly, 51-Loading cylinder reversing valve, 52-Bug hooking cylinder reversing valve, 53-Vehicle support cylinder reversing valve, 54-Bag body self-unloading cylinder reversing valve, 55-Hydraulic pump, 56-Hydraulic oil tank, 57-Suction filter, 58-Overflow valve, 59-Drive motor, 6-Pressure relay, 7-Lifting arm, 8-Fixed frame, 9-Bug hooking proximity switch, 10-Bug hooking frame, 11-Wireless remote control, 12-Controller, 13-Lifting cylinder, 14-Tilting cylinder, 15-Bug hooking cylinder, 16-Vehicle support cylinder, 17-Two-way hydraulic lock, 18-Diverter / combiner valve, 19-Bag body self-unloading cylinder, 20-Single-acting balance valve, 21-Lifting one-way sequence valve, 22-Recovery one-way sequence 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.
[0021] Example:
[0022] like Figure 1 and Figure 2As shown, a hydraulic system device for a small, pure electric, high-position self-loading and unloading garbage collection truck is disclosed. The garbage truck includes a subframe 1, on which a garbage bin 2 is mounted. A garbage bin proximity switch 3 is mounted on the front bracket of the subframe 1 via locking bolts, and a loading proximity switch 4 is mounted on the rear bracket via locking bolts. A power unit assembly 5 and a pressure relay 6 are located on the left front end of the subframe 1. A lifting arm 7 is mounted on the crossbeam at the rear end of the subframe 1. A fixed frame 8 is mounted on the lower end of the lifting arm 7, and a hanging device is mounted on the upper end of the fixed frame 8. The vehicle includes a bin proximity switch 9, with a bin-hanging frame 10 mounted at its lower end. A wireless remote control 11 and a controller 12 are mounted on the left rear end of the sub-frame 1. The controller 12 is connected to the bin-hanging proximity switch 9, the loading proximity switch 4, the pressure relay 6, the power unit assembly 5, and the garbage bin proximity switch 3 via the vehicle wiring harness. The wireless remote control 11 is connected to the controller 12 via a wireless communication protocol. The vehicle also includes a lifting cylinder 13, which is mounted between the sub-frame 1 and the lifting arm 7 via a pin. The lifting arm 7 and the fixed frame... A tilting cylinder 14 is fixedly installed between the frame 8 and the bucket-hanging frame 10 via a pin. A bucket-hanging cylinder 15 is fixedly installed between the fixed frame 8 and the bucket-hanging frame 10. The system also includes two vehicle support cylinders 16, installed at the left and right ends of the subframe 1 respectively. Pressure relays 6 are connected to the power unit assembly 5 and the vehicle support cylinders 16 respectively, responsible for detecting the system pressure of the vehicle support cylinders 16 and providing electrical signals to the controller 12. When the rodless chamber pressure of the vehicle support cylinder 16 reaches the set 8MPa, the rodless chamber... When the extension button of the vehicle support cylinder 16 on the wireless remote control 11 is de-energized, the vehicle support cylinder 16 stops extending. At the same time, the garbage bin lifting button and the garbage can lifting button on the wireless remote control 11 are energized. Logically, this ensures that the garbage bin 2 and the lifting arm 7 cannot be lifted before the vehicle support cylinder 16 is fully extended. When the pressure in the rod chamber of the vehicle support cylinder 16 reaches the set 8MPa, the vehicle support cylinder 13 retracts into place, the retraction button of the vehicle support cylinder on the wireless remote control 11 is de-energized, and the vehicle support cylinder 16 stops retracting. The garbage bin proximity switch 3 is used to detect whether the garbage bin 2 is in an unlifted state and sends an electrical signal to the controller 12. When the distance between the garbage bin proximity switch 3 and the garbage bin 2 is greater than 5mm, the retraction button of the vehicle support cylinder and the loading button on the wireless remote controller 11 will be de-energized to prevent the vehicle support cylinder 16 from retracting or the lifting arm 7 from lifting when the garbage bin 2 has not fallen. Logically, this ensures the safety of garbage unloading. The loading proximity switch 4 is used to detect whether the fixed frame 8 is in the initial position and sends an electrical signal to the controller 12. When the distance between the loading proximity switch 4 and the fixed frame 8 is greater than 5mm, the retraction button of the vehicle support cylinder and the loading button on the wireless remote controller 11 will be de-energized to prevent the vehicle support cylinder 53 from retracting or the garbage bin 2 from lifting when the lifting arm 7 and the fixed frame 8 are not in the initial position. Logically, this ensures the safety of garbage bin loading.The bin proximity switch 9 is used to detect whether the trash can is clamped in place. When the distance between the bin proximity switch 9 and the bin frame 10 is less than 5mm, the switch on the wireless remote control 11 is de-energized, and the bin cylinder 15 stops extending, ensuring that the trash can is clamped in place by design.
[0023] The vehicle support cylinder 16 is equipped with a two-way hydraulic lock 17, which is connected to the vehicle support cylinder 16 to enable the vehicle support cylinder 16 to self-lock. A flow divider / combiner valve 18 is also installed at the rear end of the subframe 1. The flow divider / combiner valve 18 has a flow ratio of 1:1 and is connected to the rodless chamber of the vehicle support cylinder 16 to achieve synchronous extension and retraction of the two vehicle support cylinders 16. The system also includes a container self-unloading cylinder 19, the front end of which is connected to the front end of the garbage container 2 via a pin. The rear end is fixed to the subframe 1 via a pin, responsible for lifting and tilting the garbage container 2. Simultaneously, a single-acting balance valve 20 is welded to the cylinder body of the container self-unloading cylinder 19. The single-acting balance valve 20 is connected to the rodless and rod-side chambers of the container self-unloading cylinder 19, ensuring a stable descent speed for the garbage container 2 and preventing rapid descent that could damage the subframe 1 or other components. It also includes a lifting one-way sequence valve 21 and a recovery one-way sequence valve 22, both fixed to the rear end of the subframe 1. The inlet of the lifting one-way sequence valve 21 is connected to the rodless chamber of the lifting cylinder 13 via a three-way connector and hydraulic lines, and the outlet is connected to the rodless chamber of the tilting cylinder 14. When the loading button on the wireless remote control 11 is energized, the lifting cylinder 13 extends first. When the lifting cylinder 13 is fully extended, the hydraulic oil pressure rises. When the pressure reaches the set pressure of 10MPa of the lifting one-way sequence valve 21, the tilting cylinder 14 begins to extend. This design ensures the sequential lifting and tilting of the garbage bin, preventing interference with the garbage container 2 during loading. The inlet of the sequence valve 22 is connected to the rod chamber of the tilting cylinder 14 via a three-way connector and a hydraulic pipeline, and the outlet is connected to the rod chamber of the lifting cylinder 4. When the recycling button of the wireless remote control 6 is energized, the tilting cylinder 14 retracts first. When the tilting cylinder 14 is fully retracted, the hydraulic oil pressure rises. When the pressure of 10MPa set by the one-way sequence valve 22 is reached, the lifting cylinder 13 begins to retract. The design principle ensures the sequential recycling of the trash can by tilting first and then lifting, avoiding interference with the trash can 2 during recycling.
[0024] Powertrain unit 5 includes a loading cylinder reversing valve 51, a hook-lift cylinder reversing valve 52, a vehicle support cylinder reversing valve 53, a box-type self-unloading cylinder reversing valve 54, and a hydraulic pump 55. The loading cylinder reversing valve 51, hook-lift cylinder reversing valve 52, vehicle support cylinder reversing valve 53, and box-type self-unloading cylinder reversing valve 54 are all three-position four-way reversing valves. Drive motor 59 drives hydraulic pump 55. Hydraulic pump 55 is connected to port P1 of box-type self-unloading cylinder reversing valve 54 and port P2 of vehicle support cylinder reversing valve 53, respectively. The system includes a hydraulic oil tank 56, which is connected to the P3 port of the bucket-hanging cylinder directional valve 52 and the P4 port of the loading cylinder directional valve 51. The hydraulic oil tank 56 is connected to the T1 port of the box-type self-unloading cylinder directional valve 54, the T2 port of the vehicle support cylinder directional valve 53, the T3 port of the bucket-hanging cylinder directional valve 52, and the T4 port of the loading cylinder directional valve 51. The A1 port of the box-type self-unloading cylinder directional valve 54 is connected to the rodless chamber of the box-type self-unloading cylinder 19 via a single-acting balance valve 20. The B1 port is connected to the box... The rod chamber of the self-unloading cylinder 19 is connected to the rod chamber of the vehicle support cylinder 16 via pressure relay 6, flow divider / combiner valve 18, and two-way hydraulic lock 17. Port B2 of the self-unloading cylinder 19 is connected to the rod chamber of the vehicle support cylinder 16 via pressure relay 6 and two-way hydraulic lock 17. Port A3 of the bucket hook cylinder directional valve 52 is connected to the rodless chamber of the bucket hook cylinder 15, and port B3 is connected to the rod chamber of the bucket hook cylinder 15. Port A4 of the loading cylinder directional valve 51 is connected to the rod chamber of the self-unloading cylinder 19. The B4 port is connected to the rodless chamber of the lifting cylinder 13 and the rodless chamber of the tilting cylinder via the lifting one-way sequence valve 21 via the three-way connector. The B4 port is connected to the rod chamber of the tilting cylinder 14 and the rod chamber of the lifting cylinder 13 via the recovery one-way sequence valve 22 via the three-way connector. An oil suction filter 57 is installed on the oil pipeline between the hydraulic oil tank 56 and the hydraulic pump 55. An overflow valve 57 is installed on the oil pipeline between the oil outlet of the hydraulic pump 55 and the hydraulic oil tank 56. The overflow valve 57 limits the maximum working pressure of the system.
[0025] When the valve core of the vehicle support cylinder reversing valve 53 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 53 are connected to the hydraulic system return oil passage for pressure relief. When the solenoid valve 2YA is energized, the vehicle support cylinder reversing valve 53 operates in the left position, and P2 and A2 are connected. High-pressure oil enters the bidirectional hydraulic lock 17 through port A2, pressure relay 6, and flow divider / combiner valve 18, opening its left-position check valve to enter the rodless chamber of the vehicle support cylinder 53. At the same time, the right-position check valve of the bidirectional hydraulic lock 17 is opened, and the low-pressure oil in the rod chamber enters the right-position check valve of the bidirectional hydraulic lock 17. The hydraulic oil returns to the hydraulic tank 56 via the directional valve, pressure relay 6, port B2, and port T2, completing the extension of the vehicle support cylinder 53. When the solenoid valve 2YB is energized, the vehicle support cylinder reversing valve 53 operates in the right position, with P2 and B2 connected. High-pressure oil enters the bidirectional hydraulic lock 17 through port B2 and pressure relay 6, opening its right-side check valve to enter the rod chamber of the vehicle support cylinder 16. Simultaneously, the left-side check valve of the bidirectional hydraulic lock 17 is opened, and the low-pressure oil in the rodless chamber returns to the hydraulic tank 56 via the left-side check valve of the bidirectional hydraulic lock 17, pressure relay 6, port A2, and port T2, completing the retraction of the vehicle support cylinder 16.
[0026] When the valve core of the self-unloading cylinder reversing valve 54 is in the neutral position, oil ports P1, T1, A1, and B1 are not connected, and the self-unloading cylinder 19 maintains pressure. When the electromagnet 1YA is energized, the self-unloading cylinder reversing valve 54 operates in the left position, P1 and A1 are connected, and T1 and B1 are connected. High-pressure oil passes through ports P1 and A1, opens the left check valve of the single-acting balance valve 20, and enters the rodless chamber of the self-unloading cylinder 54. Low-pressure oil in the rod chamber returns to the hydraulic oil tank 56 through ports B1 and T1, completing the lifting of the garbage bin 2. When the electromagnet 1YA is energized, the self-unloading cylinder reversing valve 54 operates in the right position, P1 and B1 are connected, and T1 and A1 are connected. Hydraulic oil enters the rod chamber of the self-unloading cylinder 19 through port P1, port B1, and single-acting balance valve 20. However, the hydraulic oil in the rodless chamber cannot return to the hydraulic oil tank 56 through the left check valve and right relief valve 58 of the single-acting balance valve 20. 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 20, the relief valve 58 gradually opens. The hydraulic oil in the rodless chamber returns to the hydraulic oil tank 56 through port A1 and port T1. The hydraulic oil pressure in the rod chamber decreases, the opening of the relief valve 58 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, completing the descent of the garbage bin 2.
[0027] When the valve core of the bucket-hanging cylinder reversing valve 52 is in the neutral position, oil ports P3, T3, A3, and B3 are not connected, and the bucket-hanging cylinder 10 maintains internal pressure. When the electromagnet 3YA is energized, the bucket-hanging cylinder reversing valve 52 operates in the left position, P3 and A3 are the same, and T3 and B3 are connected. High-pressure oil passes through ports P3 and A3 and enters the rodless chamber of the bucket-hanging cylinder 15. Low-pressure oil in the rod chamber returns to the hydraulic oil tank 56 through ports B3 and T3, completing the clamping of the garbage bin 2. When the solenoid valve 3YB is energized, the bucket-hanging cylinder reversing valve 52 operates in the right position, P3 and B3 are connected, and T3 and A3 are connected. High-pressure oil passes through ports P3 and B3 and enters the rod chamber of the bucket-hanging cylinder 15. Low-pressure oil in the rodless chamber returns to the hydraulic oil tank 56 through ports A3 and T3, completing the release of the garbage bin 2.
[0028] When the valve core of the loading cylinder reversing valve 51 is in the neutral position, oil ports P4, T4, A4, and B4 are not connected, and the lifting cylinder 13 and the tilting cylinder 14 maintain pressure. When the electromagnet 4YA is energized, the loading cylinder reversing valve 51 is energized to the left position, P4 and A4 are connected, and T4 and B4 are connected. High-pressure oil passes through ports P4 and A4, through the three-way pipe joint, part of which goes to the rodless chamber of the lifting cylinder 13, and part of which goes to the lifting one-way sequence valve 21. The low-pressure oil in the rod chamber of cylinder 13 returns to the hydraulic oil tank 56 via the check valve of the recovery one-way sequence valve 22, port B4, and port T4. Lifting cylinder 13 extends, lifting the garbage bin. When lifting cylinder 4 is fully extended, the pressure in the rodless chamber rises, reaching the pressure set by the lifting one-way sequence valve 21 (10 MPa). The sequence valve opens, and high-pressure oil begins to enter the rodless chamber of tilting cylinder 14. The low-pressure oil in the rod chamber of tilting cylinder 14 returns to the hydraulic oil tank 56 via B4 and T4. Tilting cylinder 14 extends, tilting garbage bin 2 to unload. When electromagnet 4YB is energized, the right-hand position of the loading cylinder reversing valve 51 is energized, connecting P4 and B4, and T4 and A4. High-pressure oil passes through port P4 and B4, and through the three-way pipe joint; part goes to the rodless chamber of tilting cylinder 14, and part goes to the recovery one-way sequence valve 22. The low-pressure oil in the rod chamber of tilting cylinder 14 passes through the check valve of the lifting one-way sequence valve 21, port A4, and port B4. The hydraulic oil tank 214 is returned to the port and T4 port, the tilting cylinder 14 retracts, and the trash can 2 is recovered. When the tilting cylinder 14 is fully retracted, the pressure in the rod chamber increases and reaches the pressure of 10MPa set by the recovery one-way sequence valve 22. The sequence valve opens, and high-pressure oil begins to enter the rod chamber of the lifting cylinder 13. The low-pressure oil in the rodless chamber of the lifting cylinder 13 returns to the hydraulic oil tank 56 via A4 and T4. The lifting cylinder 13 begins to retract, and the trash can 2 falls.
[0029] The operating procedures applicable to this hydraulic system are as follows:
[0030] S1. The entire vehicle is powered on;
[0031] S2. Pull out the emergency stop button on the wireless remote control 11;
[0032] S3. Press and hold the start button on the wireless remote control 11 for more than 3 seconds and then release it. The transmitter communication indicator on the wireless remote control 11 will flash. The garbage bin proximity switch 3 and the loading proximity switch 4 will detect the signal. The vehicle support cylinder extension button on the wireless remote control 11 will be energized.
[0033] S4. Press the vehicle support cylinder extension button on the wireless remote control 6 once. The vehicle support cylinder 13 will continue to extend, and at the same time, the vehicle support cylinder retraction button on the wireless remote control 6 will be powered.
[0034] S5, pressure relay 6 detects whether the hydraulic oil pressure reaches 8MPa. If it does not reach 8MPa, the vehicle support cylinder 16 continues to extend. When it reaches 8MPa, the vehicle support cylinder extension button on the wireless remote control 6 is de-energized, and the vehicle support cylinder 16 stops extending. At the same time, the box lifting button and loading button on the wireless remote control 11 are energized.
[0035] S6. Press the bucket hanging button on the wireless remote control 11, and the bucket hanging cylinder 15 will start to extend, and the bucket hanging frame 10 will rise.
[0036] S7. When the proximity switch 9 detects that the distance between the bin and the frame 10 is less than 5mm, the bin button on the wireless remote control 11 is de-energized, and the indicator light on the wireless remote control 11 is lit to remind the operator that the bin 2 is now clamped.
[0037] S8. Press and hold the loading button on the wireless remote control 11. The lifting cylinder 13 extends continuously, and the lifting arm 7 gradually rises. When it reaches the highest point, the tilting cylinder 14 begins to extend. The fixed frame 8 drives the garbage bin 2 to tilt, completing the garbage dumping. The loading proximity switch 4 detects that the distance to the fixed frame 8 is greater than 5mm. The vehicle support cylinder retraction button and the box lifting button on the wireless remote control 11 are de-energized.
[0038] S9. Press and hold the recycling button on the wireless remote control 11. The flip cylinder 14 continues to retract, and the fixed frame 8 drives the garbage bin to fall. When the fall is complete, the lifting cylinder 13 begins to retract, and the lifting arm 7 drives the garbage bin 2 to fall until the garbage bin 2 is completely lowered. The loading proximity switch 4 detects that the distance to the fixed frame 8 is less than 5mm, and the power is turned on the whole vehicle support cylinder retraction button and the box lifting button on the wireless remote control 11.
[0039] S10. Press and hold the bin delivery button on the wireless remote control 11. The hanging cylinder 15 will retract, and the trash can will be released.
[0040] S11. Press and hold the box lifting button on the wireless remote control 11. The lifting cylinder 13 extends and the garbage bin 2 is lifted to complete the garbage dumping. At the same time, the box retraction button on the wireless remote control 11 is energized. The garbage bin proximity switch 3 detects that the distance between the garbage bin and the box exceeds 5mm. The vehicle support cylinder retraction button and the loading button on the wireless remote control 11 are de-energized.
[0041] S12. Press and hold the lowering button on the wireless remote control 11. The lifting cylinder 13 retracts, the garbage bin 2 descends, the garbage bin proximity switch 3 detects that the distance between the garbage bin and the bin is less than 5mm, and the retraction button of the vehicle support cylinder and the loading button on the wireless remote control 11 are powered on.
[0042] S13. Press the whole vehicle support cylinder retraction button on the wireless remote control 11 once. The whole vehicle support cylinder 16 retracts. At the same time, the box lifting button and the loading button on the wireless remote control 11 are de-energized.
[0043] S14, Pressure relay 6 detects whether the hydraulic oil pressure reaches 8MPa. If it does not reach 8MPa, the vehicle support cylinder 13 continues to retract. When it reaches 8MPa, the retraction button of the vehicle support cylinder 13 on the wireless remote control 11 is de-energized, and the vehicle support cylinder 13 stops retracting.
[0044] S15. Press the emergency stop switch.
[0045] 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 orientation or positional relationship shown in the actual object. They 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. Therefore, they should not be construed as limitations on this utility model.
[0046] The above provides a detailed description of the hydraulic system device for a small pure electric high-position self-loading and unloading garbage collection vehicle 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 premise of this utility model, and these improvements and modifications also fall within the protection scope of the claims of this utility model.
Claims
1. A hydraulic system device for a small, pure electric, high-position self-loading and unloading garbage collection vehicle, characterized in that: The garbage truck includes a subframe (1), on which a garbage bin (2) is mounted. A garbage bin proximity switch (3) is installed on the bracket at the front end of the subframe (1), and a loading proximity switch (4) is installed on the bracket at the rear end. A power unit assembly (5) and a pressure relay (6) are mounted on the front left side of the subframe (1). A lifting arm (7) is mounted on the crossbeam at the rear end of the subframe (1). A fixed frame (8) is mounted on the lower end of the lifting arm (7), and a fixture is mounted on the upper end of the fixed frame (8). The bin-hanging proximity switch (9) has a bin-hanging frame (10) installed at its lower end. A wireless remote controller (11) and a controller (12) are installed at the left rear end of the subframe (1). The controller (12) is connected to the bin-hanging proximity switch (9), the loading proximity switch (4), the pressure relay (6), the power unit assembly (5), and the garbage bin proximity switch (3) through the vehicle wiring harness. The wireless remote controller (11) is connected to the controller (12) via a wireless communication protocol. The system also includes a lifting cylinder (13), which is installed between the subframe (1) and the lifting arm (7). A tilting cylinder (14) is fixedly installed between the lifting arm (7) and the fixed frame (8) through a pin. A bin-hanging cylinder (15) is fixedly installed between the fixed frame (8) and the bin-hanging frame (10). The system also includes a vehicle support cylinder (16), of which there are two, which are installed at the left and right ends of the subframe (1). The pressure relay... (6) It is connected to the power unit assembly (5) and the vehicle support cylinder (16) respectively, and also includes a lifting one-way sequence valve (21) and a recovery one-way sequence valve (22). The lifting one-way sequence valve (21) and the recovery one-way sequence valve (22) are both fixed at the rear end of the subframe (1). The inlet end of the lifting one-way sequence valve (21) is connected to the rodless chamber of the lifting cylinder (13) through a three-way connector and hydraulic pipeline, and the outlet end is connected to the rodless chamber of the tilting cylinder (14).
2. The hydraulic system device for a small pure electric high-position self-loading and unloading garbage collection vehicle according to claim 1, characterized in that: The vehicle support cylinder (16) is provided with a two-way hydraulic lock (17) on its cylinder body. The two-way hydraulic lock (17) is connected to the vehicle support cylinder (16) so that the vehicle support cylinder (16) can be self-locking.
3. The hydraulic system device for a small pure electric high-position self-loading and unloading garbage collection vehicle according to claim 2, characterized in that: The rear end of the subframe (1) is also equipped with a flow divider valve (18), the flow divider valve (18) has a flow divider ratio of 1:1, the flow divider valve (18) is connected to the rodless chamber of the vehicle support cylinder (16) to realize the synchronous extension and retraction of the two vehicle support cylinders (16).
4. The hydraulic system device for a small pure electric high-position self-loading and unloading garbage collection vehicle according to claim 1, characterized in that: It also includes a self-unloading cylinder (19) for the container. The front end of the self-unloading cylinder (19) is connected to the front end of the garbage container (2) by a pin, and the rear end is fixed on the subframe (1) by a pin. It is responsible for lifting and dumping the garbage container (2).
5. The hydraulic system device for a small pure electric high-position self-loading and unloading garbage collection vehicle according to claim 4, characterized in that: A single-acting balance valve (20) is welded on the cylinder body of the self-unloading cylinder (19). The single-acting balance valve (20) is connected to the rodless chamber and the rod chamber of the self-unloading cylinder (19) and is responsible for ensuring the stable descent speed of the garbage bin (2).
6. The hydraulic system device for a small pure electric high-position self-loading and unloading garbage collection vehicle according to claim 1, characterized in that: The power unit assembly (5) includes a loading cylinder reversing valve (51), a bucket-hanging cylinder reversing valve (52), a vehicle support cylinder reversing valve (53), a box-type self-unloading cylinder reversing valve (54), and a hydraulic pump (55). The loading cylinder reversing valve (51), the bucket-hanging cylinder reversing valve (52), the vehicle support cylinder reversing valve (53), and the box-type self-unloading cylinder reversing valve (54) are all three-position four-way reversing valves. The drive motor (59) drives the hydraulic pump (55) to work. The hydraulic pump (55) is connected to the box-type self-unloading cylinder reversing valve (54) respectively. The system includes a hydraulic tank (56) connected to the P1 port of the self-unloading cylinder reversing valve (54), the P2 port of the vehicle support cylinder reversing valve (53), the P3 port of the hook-lift cylinder reversing valve (52), and the P4 port of the loading cylinder reversing valve (51). The hydraulic tank (56) is connected to the T1 port of the self-unloading cylinder reversing valve (54), the T2 port of the vehicle support cylinder reversing valve (53), the T3 port of the hook-lift cylinder reversing valve (52), and the T4 port of the loading cylinder reversing valve (51). The A1 port of the unloading cylinder reversing valve (54) is connected to the rodless chamber of the box-type self-unloading cylinder (19) through a single-acting balance valve (20), and the B1 port is connected to the rod chamber of the box-type self-unloading cylinder (19). The A2 port of the vehicle support cylinder reversing valve (53) is connected to the rodless chamber of the vehicle support cylinder (16) through a pressure relay (6), a flow divider / combiner valve (18), and a two-way hydraulic lock (17), and the B2 port is connected to the rod chamber of the vehicle support cylinder (16) through a pressure relay (6) and a two-way hydraulic lock (17). The A3 port of the bucket-hanging cylinder reversing valve (52) is connected to the rodless chamber of the bucket-hanging cylinder (15), and the B3 port is connected to the rod chamber of the bucket-hanging cylinder (15). The A4 port of the feeding cylinder reversing valve (51) is connected to the rodless chamber of the lifting cylinder (13) and the rodless chamber of the tilting cylinder via the lifting one-way sequence valve (21) via a three-way connector. The B4 port is connected to the rod chamber of the tilting cylinder (14) and the rod chamber of the lifting cylinder (13) via the recovery one-way sequence valve (22) via a three-way connector.
7. The hydraulic system device for a small pure electric high-position self-loading and unloading garbage collection vehicle according to claim 6, characterized in that: An oil suction filter (57) is installed on the oil pipeline between the hydraulic oil tank (56) and the hydraulic pump (55).
8. The hydraulic system device for a small pure electric high-position self-loading and unloading garbage collection vehicle according to claim 7, characterized in that: An overflow valve (58) is installed on the oil line between the oil outlet of the hydraulic pump (55) and the hydraulic oil tank (56). The overflow valve is used to limit the maximum working pressure of the system.