CN114233709A - Hydraulic device for compression type garbage truck and compression type garbage truck - Google Patents

Hydraulic device for compression type garbage truck and compression type garbage truck Download PDF

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Publication number
CN114233709A
CN114233709A CN202111646540.3A CN202111646540A CN114233709A CN 114233709 A CN114233709 A CN 114233709A CN 202111646540 A CN202111646540 A CN 202111646540A CN 114233709 A CN114233709 A CN 114233709A
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China
Prior art keywords
oil
control valve
power
buffer
power part
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Granted
Application number
CN202111646540.3A
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Chinese (zh)
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CN114233709B (en
Inventor
杨广生
许月平
马鹏卫
沈董董
高枘
嵇佳文
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Qihang Automobile Co ltd
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Qihang Automobile Co ltd
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Priority to CN202111646540.3A priority Critical patent/CN114233709B/en
Priority claimed from CN202111646540.3A external-priority patent/CN114233709B/en
Publication of CN114233709A publication Critical patent/CN114233709A/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
    • F15B11/16—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65F—GATHERING OR REMOVAL OF DOMESTIC OR LIKE REFUSE
    • B65F3/00—Vehicles particularly adapted for collecting refuse
    • B65F3/14—Vehicles particularly adapted for collecting refuse with devices for charging, distributing or compressing refuse in the interior of the tank of a refuse vehicle
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B13/00—Details of servomotor systems ; Valves for servomotor systems
    • F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/20—Other details, e.g. assembly with regulating devices
    • F15B15/22—Other details, e.g. assembly with regulating devices for accelerating or decelerating the stroke
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B13/00—Details of servomotor systems ; Valves for servomotor systems
    • F15B2013/002—Modular valves, i.e. consisting of an assembly of interchangeable components
    • F15B2013/004—Cartridge valves

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Engineering & Computer Science (AREA)
  • Fluid-Pressure Circuits (AREA)

Abstract

The invention provides a hydraulic device for a compression-type garbage truck and the compression-type garbage truck. The hydraulic apparatus of the present invention comprises: the oil storage and supply part is used for providing oil required by the operation of the hydraulic device; a power plant, comprising: a push shovel power part, a sliding plate power part, a scraper power part, a lifting power part and a bucket turning power part; the control valve part is respectively connected with the oil storage and supply part and the power device and is used for controlling oil in the oil storage and supply part to enter and exit the power device; the oil pump is arranged between the oil storage and supply part and the control valve part and is used for controlling the oil liquid in the oil storage and supply part to enter the control valve part; and a differential control part arranged between the sliding plate power part and the control valve part and used for accelerating the operation of the sliding plate power part. According to the invention, the differential control part is arranged on the hydraulic device of the compression type garbage truck, so that oil in the oil cylinder can be rapidly operated, the operation time is shortened, and the garbage treatment efficiency is improved.

Description

Hydraulic device for compression type garbage truck and compression type garbage truck
Technical Field
The invention relates to the technical field of garbage trucks, in particular to a hydraulic device for a compression type garbage truck and the compression type garbage truck.
Background
The compression garbage truck is a sanitation truck for garbage collection and transfer, and has the characteristics of simple and convenient garbage collection, large loading capacity and the like. However, in the actual use, there is a problem that: the existing compression type garbage truck hydraulic system transmits power through a power take-off shaft of a chassis engine, the power is constant, the speed of an actuating mechanism of the hydraulic system cannot be increased under the condition of meeting the pressure, the operation time cannot be shortened when field operators perform press-fitting circulating action, and the garbage disposal efficiency is reduced.
Disclosure of Invention
According to the invention, the differential control part is arranged on the hydraulic device of the compression type garbage truck, so that oil in the oil cylinder can be rapidly operated, the operation time is shortened, and the garbage treatment efficiency is improved.
In order to solve the above problems, the present invention provides a hydraulic device for a compression-type garbage truck, the hydraulic device including: the oil storage and supply part is used for providing oil liquid required by the operation of the hydraulic device; power plant, power plant includes: a push shovel power part, a sliding plate power part, a scraper power part, a lifting power part and a bucket turning power part; the control valve part is respectively connected with the oil storage and supply part and the power device and is used for controlling oil in the oil storage and supply part to enter and exit the power device; the oil pump is arranged between the oil storage and supply part and the control valve part and is used for controlling oil in the oil storage and supply part to enter the control valve part; and the differential control part is arranged between the sliding plate power part and the control valve part and is used for accelerating the operation of the sliding plate power part.
Compared with the prior art, the technical scheme has the following technical effects: the operation time is shortened, and the efficiency of garbage disposal is improved. When the hydraulic device operates, the oil pump extracts oil in the oil storage and supply part and inputs the oil into the control valve part, the control valve part regulates the oil to enter each part of the power device, the oil firstly passes through the differential control part before entering the sliding plate power part, the differential control part is arranged between the sliding plate power part and the control valve part, the differential control part accelerates the speed of the oil entering and exiting the sliding plate power part by changing the trend of the oil, the power device regulates the operation of each part by controlling the operation of the oil cylinder, and the oil returns to the oil storage and supply part through the oil return pipeline. According to the invention, the hydraulic device is provided with the differential control part, and the differential control part can shorten the movement path of oil, so that the oil in the oil cylinder can run quickly, the operation time is shortened, and the garbage disposal efficiency is improved.
In one example of the present invention, the control valve portion includes: the first control valve is arranged between the push shovel power part and the oil pump; the second control valve is arranged between the sliding plate power part and the oil pump; the third control valve is arranged between the scraper power part and the oil pump; the fourth control valve is arranged between the lifting power part and the oil pump; and the fifth control valve is arranged between the barrel turning power part and the oil pump.
Compared with the prior art, the technical scheme has the following technical effects: and a circuit for controlling the oil to enter and exit the power device. The first control valve is used for controlling oil to enter a circuit of the push shovel power part, the second control valve is used for controlling oil to enter a circuit of the sliding plate power part, the third control valve is used for controlling oil to enter a circuit of the scraper blade power part, the fourth control valve is used for controlling oil to enter a circuit of the lifting power part, the fifth control valve is used for controlling oil to enter a circuit of the bucket turning power part, the circuits of the oil entering the power part are different, and the motion states of the power part are also different.
In one example of the present invention, an oil pump includes: the first oil outlet is respectively connected with the first control valve, the second control valve and the third control valve and used for supplying oil to the push shovel power part, the sliding plate power part and the scraper blade power part; and the second oil outlet is connected with the fourth control valve and the fifth control valve and used for providing oil for the lifting power part and the bucket turning power part.
Compared with the prior art, the technical scheme has the following technical effects: and oil supply of the power device is guaranteed. The oil pump is divided into two independent oil outlets, so that the problems that the power device cannot realize cooperative operation and the operating efficiency of the power device is reduced due to a single oil outlet can be solved; meanwhile, the oil outlet problem can be quickly checked by separating the oil outlet, so that the hydraulic device can be quickly recovered to operate.
In one embodiment of the present invention, the second oil outlet is further connected to the first control valve, the second control valve, and the third control valve, respectively, and the second oil outlet is further capable of supplying oil to the blade power unit, the slide plate power unit, and the scraper power unit.
Compared with the prior art, the technical scheme has the following technical effects: the working speeds of the push shovel power part, the sliding plate power part and the scraper blade power part are improved. When the lifting power part and the bucket turning power part do not work, the first oil outlet and the second oil outlet can provide oil liquid for the push shovel power part, the sliding plate power part and the scraper blade power part simultaneously, so that the working speeds of the push shovel power part, the sliding plate power part and the scraper blade power part are increased.
In one example of the present invention, the slide power unit includes at least two slide cylinders, each of the at least two slide cylinders including: a first chamber, a second chamber; the differential control unit includes: a diverter valve; the reversing valve is respectively connected with the first chamber and the second chamber and is used for enabling oil liquid in one of the first chamber and the second chamber to directly enter the other chamber.
Compared with the prior art, the technical scheme has the following technical effects: the extension time of the sliding plate oil cylinder is reduced, and the operation time is saved. The first chamber can be a rod cavity of the sliding plate oil cylinder and the second chamber is a rodless cavity, or the first chamber is a rodless cavity of the sliding plate oil cylinder and the second chamber is a rod cavity. When the slide plate oil cylinder is at the highest position, the oil in the rod cavity is at the maximum value, the oil in the rodless cavity is at the minimum value, the detection switch reads a signal, the reversing valve is electrified, and differential confluence is opened; in the process that the sliding plate oil cylinder moves downwards, oil in the rod cavity is reduced, oil in the rodless cavity is increased, return oil in the rod cavity can only enter the rodless cavity through the differential control part, the design reduces the extension time of the sliding plate oil cylinder, the rapid movement of the rodless cavity is realized, and the operation time is greatly saved.
In one example of the present invention, the differential control section further includes: a sequence valve; push away shovel power portion including pushing away the shovel hydro-cylinder, push away the shovel hydro-cylinder and include: a third chamber; wherein the sequence valve is disposed between the third chamber and the first chamber.
Compared with the prior art, the technical scheme has the following technical effects: the push shovel is matched with the sliding plate, so that the compression of the garbage reaches a certain compression ratio. When the first chamber or the second chamber of the sliding plate oil cylinder is filled with oil, the sliding plate power part controls the sliding plate to contract, the sequence valve of the differential control part is opened, and the oil in the third chamber of the push shovel oil cylinder is communicated with the oil storage and supply part through the sequence valve.
In one example of the invention, the reversing valve is a plate-type electromagnetic reversing valve; and/or the sequence valve is a cartridge sequence valve.
Compared with the prior art, the technical scheme has the following technical effects: the differential control unit is simplified and the differential control unit can perform an optimum speed-up function. By selecting the plate-type electromagnetic directional valve as the directional valve and the cartridge-type sequence valve as the sequence valve, the structure of the differential control part can be simplified, and the differential control part can play the optimal function of lifting the oil operation.
In one example of the invention, the skateboard power section and/or the screed power section comprises: the buffer oil cylinder is provided with a buffer cavity and a buffer block.
Compared with the prior art, the technical scheme has the following technical effects: the support stability of the oil cylinder is improved, the fatigue failure of the oil cylinder is delayed, and the service life of the oil cylinder is prolonged. When the common oil cylinder is impacted by high-speed load, the piston and the piston rod move rapidly, so that the support stability is low, meanwhile, the rapid movement of the piston can cause the pressure of hydraulic oil in an oil cavity to change rapidly, the impact on the piston and a cylinder body assembly is overlarge, and the fatigue failure of the oil cylinder is easily caused. This embodiment is through replacing the ordinary hydro-cylinder in slide power portion, the scraper blade power portion with buffer cylinder, can effectively reduce the impact to hydraulic components and parts's influence. Be provided with cushion chamber and buffer block on buffer cylinder, when receiving the load impact, the buffer block inserts in the cushion chamber, the annular damping hole of surface and the internal surface shape of cushion block, hydraulic oil in the working chamber receives the slow buffer chamber that flows out of damping action of damping hole, thereby the moving speed of piston has been slowed down, the cushioning effect has been played, the impact of fluid to the hydro-cylinder subassembly has been reduced, the support stability of hydro-cylinder has been improved, the fatigue failure of hydro-cylinder has been delayed, the life of hydro-cylinder has been promoted.
In one example of the present invention, a buffer chamber includes: the first buffer cavity is arranged between the bottom of the buffer oil cylinder and the piston rod; the second buffer cavity is arranged on the cylinder top sleeve of the buffer oil cylinder; the buffer block includes: the first buffer block is arranged on one side, close to the cylinder bottom, of the piston of the buffer oil cylinder; and the second buffer block is arranged on one side, close to the cylinder top sleeve, of the piston of the buffer oil cylinder.
Compared with the prior art, the technical scheme has the following technical effects: the hydro-cylinder is protected comprehensively. When the buffer oil cylinder is impacted by load to cause the piston to move rapidly, if the piston moves towards the cylinder bottom, the first buffer block is inserted into the first buffer cavity, the outer surface of the first buffer block and the inner surface of the first buffer cavity form an annular damping hole, and hydraulic oil in the working cavity slowly flows out of the first buffer cavity under the damping action of the damping hole; if the piston moves towards the direction of the cylinder top sleeve, the second buffer block is inserted into the second buffer cavity, the outer surface of the second buffer block and the inner surface of the second buffer cavity form an annular damping hole, and hydraulic oil in the working cavity slowly flows out of the second buffer cavity under the damping action of the damping hole. The design sets up the buffering on two directions of motion of piston, and protection buffer cylinder that can be comprehensive does not receive the impact of oil pressure rapid change to piston and cylinder body subassembly.
The invention also provides a compression-type garbage truck which comprises the hydraulic device for the compression-type garbage truck.
Compared with the prior art, the technical scheme has the following technical effects: the working efficiency of the compression garbage truck is improved. The running speed of the hydraulic device in the compression type garbage truck is increased by increasing the running speed of the oil liquid, so that the running speed of the sliding plate in the compression type garbage truck is increased, the time for loading garbage by the compression type garbage truck is shortened, and the working efficiency of the compression type garbage truck is improved.
Drawings
Fig. 1 is a schematic structural diagram of a hydraulic apparatus according to an embodiment of the present invention.
Fig. 2 is a schematic diagram of a connection structure of the differential control unit in fig. 1.
Fig. 3 is a schematic diagram of a specific structure of the differential control unit.
Fig. 4 is a front view of the differential control section of fig. 3.
Fig. 5 is a left side view of the differential control section in fig. 3.
Fig. 6 is a right side view of the differential control section of fig. 3.
Fig. 7 is a plan view of the differential control unit in fig. 3.
FIG. 8 is a schematic view of the differential control unit from another perspective.
Fig. 9 is a schematic structural view of the cushion cylinder.
Fig. 10 is a schematic structural diagram of a compression garbage truck.
Description of reference numerals:
100-a hydraulic device; 110-oil storage and supply; 111-oil drain ball valve; 112-return oil filter; 113-liquid level switch; 114-an air filter; 115-an oil absorption filter; 116-a liquid level meter; 117-stop valve; 120-a power plant; 121-a push shovel power part; 121-1-push shovel cylinder; 121-1 a-a third chamber; 122-a skateboard power section; 122-1-at least two ram cylinders; 122-1 a-a first chamber; 122-1 b-a second chamber; 123-a scraper power part; 124-lifting power part; 125-barrel turning power part; 130-a control valve portion; 131-a first control valve; 132-a second control valve; 133-a third control valve; 134-a fourth control valve; 135-a fifth control valve; 140-an oil pump; 141-a first oil outlet; 142-a second oil outlet; 150-differential control section; 151-a reversing valve; 152-a one-way valve; 153-sequence valve; 154-a valve block; 161-return line; 162-an oil outlet line; 170-buffer oil cylinder; 171-a buffer chamber; 171-1-a first buffer chamber; 171-2-a second buffer chamber; 172-buffer block; 172-1-first buffer block; 172-2-second buffer block; 173-the bottom of the cylinder; 174-a piston rod; 175-cylinder top sleeve; 176-a piston; 200-compression garbage truck; 210-a push plate; 220-a skateboard; 230-a squeegee; 240-hopper; 250-barrel overturning frame.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
The first embodiment is as follows:
referring to fig. 1, the present embodiment provides a hydraulic device for a compression-type garbage truck, and the hydraulic device 100 includes: an oil storage and supply part 110, wherein the oil storage and supply part 110 is used for providing oil required by the operation of the hydraulic device 100; the power plant 120, the power plant 120 includes: a shovel power part 121, a sliding plate power part 122, a scraper power part 123, a lifting power part 124 and a bucket turning power part 125; a control valve unit 130, the control valve unit 130 being connected to the oil storage and supply unit 110 and the power unit 120, respectively, the control valve unit 130 being configured to control the oil in the oil storage and supply unit 110 to enter and exit the power unit 120; an oil pump 140, the oil pump 140 being disposed between the oil storage and supply unit 110 and the control valve unit 130, the oil pump 140 being configured to control the oil in the oil storage and supply unit 110 to enter the control valve unit 130; a differential control unit 150, the differential control unit 150 is provided between the slide plate power unit 122 and the control valve unit 130, and the differential control unit 150 is used for accelerating the operation of the slide plate power unit 122.
Wherein, oil storage and supply portion 110 includes: an oil discharge ball valve 111, an oil return filter 112, a liquid level switch 113, an air filter 114, an oil suction filter 115, a liquid level meter 116 and a stop valve 117. The return filter 112 is connected to the return line 161 for cleaning the oil returned via the return line 161. The oil suction filter 115 is connected to the oil outlet line 162, and is used to clean the oil output through the oil outlet line 162. The shutoff valve 117 is disposed on the oil outlet line 162, and is used to control whether oil is output. The oil return filter 112 is a 10 mu high-precision glass fiber filter element with a differential pressure transmitter and a bypass valve. The oil reservoir 110 functions as an oil tank in the hydraulic device 100, and is used to output and recover oil required for the operation of the hydraulic device 100.
In the power device 120, the push shovel power part 121 mainly controls the operation of the oil cylinder, so as to control the movement of the push shovel in the garbage truck; the sliding plate power part 122 mainly controls the operation of the oil cylinder so as to control the movement of the sliding plate in the garbage truck; the scraper power part 123 mainly controls the operation of the oil cylinder, so as to control the movement of a scraper in the garbage truck; the lifting power part 124 controls the movement of the material filling device in the garbage truck mainly by controlling the operation of the oil cylinder; the turning power part 125 mainly controls the operation of the oil cylinder, thereby controlling the turning motion of the trash can. The push shovel power part 121, the sliding plate power part 122 and the scraper power part 123 run separately and are not linked; the lifting power part 124 and the barrel turning power part 125 operate separately and are not linked.
The control valve part 130 is a five-piece valve structure and is connected with the power device 120, and the control valve part 130 can control whether the oil in the oil storage and supply part 110 enters the push shovel power part 121, the sliding plate power part 122, the scraper power part 123, the lifting power part 124 and the bucket turning power part 125 in the power device 120. A safety protection valve is arranged on each oil inlet of the control valve portion 130.
When the hydraulic device 100 is operated, the oil pump 140 pumps the oil in the oil storage and supply part 110 and inputs the oil into the control valve part 130, the control valve part 130 regulates and controls the oil to enter each part of the power device 120, the oil passes through the differential control part 150 before entering the power part 122 of the slide plate, the differential control part 150 accelerates the speed of the oil entering and exiting the power part 122 of the slide plate by changing the trend of the oil, the power device 120 regulates and controls the operation of each part by controlling the operation of the oil cylinder, and the oil returns to the oil storage and supply part 110 through the oil return pipeline 161.
The hydraulic device 100 of the embodiment is provided with the differential control part 150, so that the oil in the oil cylinder can be rapidly operated, the operation time is shortened, and the garbage disposal efficiency is improved.
Example two:
in addition to the first embodiment, referring to fig. 1, the control valve section 130 includes: a first control valve 131, the first control valve 131 being disposed between the blade power section 121 and the oil pump 140; a second control valve 132, the second control valve 132 being disposed between the slide plate power portion 122 and the oil pump 140; a third control valve 133, the third control valve 133 being disposed between the blade power section 123 and the oil pump 140; a fourth control valve 134, the fourth control valve 134 being disposed between the lifting power part 124 and the oil pump 140; and a fifth control valve 135, wherein the fifth control valve 135 is arranged between the barrel-turning power part 125 and the oil pump 140.
The control valve part 130 is a five-piece valve structure, and is a push shovel control linkage, a slide plate control linkage, a scraper control linkage, a lifting control linkage, and a bucket turning control linkage. A first control valve 131 is provided on the blade control link, a second control valve 132 is provided on the slide plate control link, a third control valve 133 is provided on the blade control link, a fourth control valve 134 is provided on the lift control link, and a fifth control valve 135 is provided on the bucket turning control link.
The first control valve 131 is used for controlling a circuit of oil entering the push shovel power part 121, the second control valve 132 is used for controlling a circuit of oil entering the sliding plate power part 122, the third control valve 133 is used for controlling a circuit of oil entering the scraper blade power part 123, the fourth control valve 134 is used for controlling a circuit of oil entering the lifting power part 124, the fifth control valve 135 is used for controlling a circuit of oil entering the bucket turning power part 125, the circuits of oil entering all parts of the power device 120 are different, and the motion states of all parts of the power device 120 are also different.
The control valve unit 130 is provided with separate control valves for each section of the power unit 120, which facilitates control of the sections of the power unit 120, prevents the problem of difficulty in operation of the sections due to damage of one control valve, and facilitates maintenance of the control valve.
Example three:
on the basis of the second embodiment, referring to fig. 1, the oil pump 120 includes: the first oil outlet 141 is respectively connected with the first control valve 131, the second control valve 132 and the third control valve 133, and the first oil outlet 141 is used for supplying oil to the blade power part 121, the sliding plate power part 122 and the scraper power part 123; and a second oil outlet 142, wherein the second oil outlet 142 is connected with the fourth control valve 134 and the fifth control valve 135, and the second oil outlet 142 is used for supplying oil to the lifting power part 124 and the bucket overturning power part 125.
The oil pump 120 is a duplicate gear pump and has two independent oil suction ports and oil outlet ports, the oil suction ports are respectively connected with the oil storage and supply portion 110 through hydraulic rubber hoses, the oil outlet ports are respectively connected with the ports P1 and P2 of the control valve portion 130 through hydraulic rubber hoses, and safety protection valves are respectively arranged on the ports P1 and P2.
The oil outlet of the oil pump 120 comprises a first oil outlet 141 and a second oil outlet 142, the first oil outlet 141 is connected with a port P1 of the control valve portion 130, a port P1 is respectively connected with the first control valve 131, the second control valve 132 and the third control valve 133, and the first oil outlet 141 is used for supplying oil to the blade power portion 121, the slide plate power portion 122 and the scraper blade power portion 123; the second oil outlet 142 is connected to the port P2 of the control valve portion 130, the port P2 is connected to the fourth control valve 134 and the fifth control valve 135, and the second oil outlet 142 is used for supplying oil to the lifting power portion 124 and the bucket overturning power portion 125.
The oil pump 120 is divided into two independent oil outlets, so that the problems that the power device cannot realize cooperative operation and the operation efficiency of the power device 120 is reduced due to a single oil outlet can be solved; meanwhile, the separated oil discharge can also accelerate the inspection of the oil discharge problem, so that the hydraulic device 100 can be quickly recovered to operate.
In a specific embodiment, a barrel-turning cylinder is arranged in the barrel-turning power part 125, when the barrel-turning control valve spool is in the lower position, oil output from the second oil outlet 142 enters a rod cavity of the barrel-turning cylinder through a liquid path P2-a5, and oil in a rodless cavity returns to the oil storage and supply part 110 through a liquid path B5-T1. When the bucket overturning control valve core is in an upper position, oil output by the second oil outlet 142 enters a rodless cavity of the bucket overturning oil cylinder through a P2-B5 liquid path, and oil in a rod cavity returns to the oil storage and supply part 110 through an A5-T1 liquid path. When the bucket overturning control valve core is in the middle position, the oil ports A5 and B5 are cut off. A safety protection valve is arranged on a rod cavity of the barrel turning oil cylinder.
In one embodiment, the lift power unit 124 is provided with a lift cylinder, and when the lift control valve spool is in the lower position, the oil output from the second oil outlet 142 enters a rodless chamber of the lift cylinder through a P2-a4 fluid path, and the oil in a rod chamber returns to the oil storage and supply unit 110 through a B4-T1 fluid path. When the lifting control valve spool is in an upper position, oil output from the second oil outlet 142 enters a rod cavity of the lifting oil cylinder through a P2-B4 liquid path, and oil in a rodless cavity returns to the oil storage and supply part 110 through an A4-T1 liquid path. When the lifting control valve spool is in the middle position, the oil ports A4 and B4 are cut off.
Example four:
on the basis of the third embodiment, referring to fig. 1, the second oil outlet 142 is further connected to the first control valve 131, the second control valve 132, and the third control valve 133, respectively, and the second oil outlet 142 can also provide oil to the dozing blade power part 121, the sliding plate power part 122, and the scraper blade power part 123.
When the lifting power part 124 and the bucket overturning power part 125 do not work, the port P1 and the port P2 are merged, and the first oil outlet 141 and the second oil outlet 142 can simultaneously provide oil for the shovel power part 121, the sliding plate power part 122 and the scraper power part 123, so that the working speeds of the shovel power part 121, the sliding plate power part 122 and the scraper power part 123 are increased.
In a specific embodiment, a scraper oil cylinder is arranged in the scraper power part 123, when the scraper control valve spool is in the lower position, oil output from the first oil outlet 141 enters a rodless cavity of the scraper oil cylinder through a liquid path P1-A3, oil output from the second oil outlet 142 enters a rodless cavity of the scraper oil cylinder through a liquid path P2-A3, and oil in the rod cavity returns to the oil storage and supply part 110 through a liquid path B3-T1. When the scraper control valve core is in an upper position, oil output from the second oil outlet 142 enters a rod cavity of the scraper oil cylinder through a P2-B3 liquid path, and oil in a rodless cavity returns to the oil storage and supply part 110 through an A3-T1 liquid path. When the scraper control valve spool is in the middle position, the oil ports A3 and B3 are cut off. A safety protection valve is arranged on a rod cavity of the scraper oil cylinder.
In a specific embodiment, a slide plate cylinder 122-1 is disposed in the slide plate power portion 122, when the slide plate control valve spool is in the lower position, oil output from the first oil outlet 141 enters a rodless chamber of the slide plate cylinder 122-1 through a P1-a2 liquid path, oil output from the second oil outlet 142 enters a rodless chamber of the slide plate cylinder 122-1 through a P2-a2 liquid path, and oil in a rod chamber returns to the oil storage and supply portion 110 through a B2-T1 liquid path. When the slide plate control valve spool is in an upper position, oil output from the second oil outlet 142 enters a rod cavity of the slide plate oil cylinder 122-1 through a P2-B2 liquid path, and oil in a rodless cavity returns to the oil storage and supply part 110 through an A2-T1 liquid path. When the slide plate control valve core is in the middle position, the oil ports A2 and B2 are cut off.
In a specific embodiment, a blade oil cylinder is arranged in the blade power part 121, when the blade control valve spool is in the lower position, oil output from the first oil outlet 141 enters a rodless cavity of the blade oil cylinder through a P1-A1 liquid path, oil output from the second oil outlet 142 enters a rodless cavity of the blade oil cylinder through a P2-A1 liquid path, and oil in the rod cavity returns to the oil storage and supply part 110 through a B1-T1 liquid path. When the control valve core of the blade is in an upper position, oil output from the second oil outlet 142 enters a rod cavity of the blade oil cylinder through a P2-B1 liquid path, and oil in a rodless cavity returns to the oil storage and supply part 110 through an A1-T1 liquid path. When the control valve core of the shovel is in the middle position, the oil ports A3 and B3 are cut off. A safety protection valve is arranged on a rod cavity of the push shovel oil cylinder.
Example five:
on the basis of the first embodiment, referring to fig. 1-8, the skateboard power part 122 includes at least two skateboard cylinders 122-1, and each of the at least two skateboard cylinders 122-1 includes: a first chamber 122-1a, a second chamber 122-1 b; the differential control unit 150 includes: a direction change valve 151; wherein the direction changing valve 151 is connected to the first and second chambers 122-1a and 122-1b, respectively, and the direction changing valve 151 is used to allow oil of one of the first and second chambers 122-1a and 122-1b to directly enter the other.
In a specific embodiment, the first chamber 122-1a is a rod chamber, the second chamber 122-1b is a rodless chamber, when the ram cylinder 122-1 is at the highest position, the oil in the first chamber 122-1a is at the maximum value, the oil in the second chamber 122-1b is at the minimum value, the detection switch reads a signal, so that the reversing valve 151 is powered, and the differential confluence is opened; during downward movement of the ram cylinder 122-1, oil in the first chamber 122-1a decreases, oil in the second chamber 122-1b increases, and return oil in the first chamber 122-1a can only enter the second chamber 122-1b via P3. Such a design enables rapid movement of the rodless second chamber 122-1b, greatly saving operating time.
Fig. 3 to 8 are specific structural schematic diagrams of the differential control section 150, and it can be seen that the valve block 154 is a base body of the differential control section 150, the selector valve 151 is disposed at an upper end of the valve block 154, the check valve 152 is disposed at a rear surface of the valve block 154, and the sequence valve 153 is disposed at a side surface of the valve block 154.
In a specific embodiment, to test the performance of the hydraulic apparatus 100, the sled power section 122 includes two sled cylinders 122-1 and the screed power section 123 includes two screed cylinders. The diameter of the sliding plate oil cylinder 122-1 is 100 mm, the diameter of the rod is 50 mm, the stroke is 800 mm, the diameter of the scraper oil cylinder is 90 mm, the diameter of the rod is 55 mm, and the stroke is 500 mm, and the detection is carried out under the conditions that the hydraulic oil temperature is 45 ℃ and the system flow is 80L/min. In the case where the differential control unit 150 is not used: the extension time of the scraper oil cylinder is 4.8 seconds, the retraction time of the scraper oil cylinder is 3 seconds, the extension time of the slide plate oil cylinder 122-1 is 9.4 seconds, the retraction time of the slide plate oil cylinder 122-1 is 7.1 seconds, and the one-time cycle time is 24.3 seconds; in the case of using the differential control unit 150: the extension time of the scraper oil cylinder is 4.8 seconds, the retraction time of the scraper oil cylinder is 3 seconds, the extension time of the skateboard oil cylinder 122-1 is 2.4 seconds, the retraction time of the skateboard oil cylinder 122-1 is 7.1 seconds, and the one-time cycle time is 17.2 seconds. By comparison, it can be seen that the hydraulic apparatus 100 using the differential control portion 150 enables a speed increase of 30% in the entire cycle by reducing the extension time of the ram cylinder 122-1.
Example six:
in addition to the fifth embodiment, referring to fig. 1 to 8, the differential control section 150 further includes: a sequence valve 153; the blade power unit 121 includes a blade cylinder 121-1, and the blade cylinder 121-1 includes: the third chamber 121-1 a; wherein the sequence valve 153 is disposed between the third chamber 121-1a and the first chamber 122-1a
In a specific embodiment, when the rod chamber of the sliding plate cylinder 122-1 is filled with oil, the sliding plate power part 122 controls the sliding plate to contract, and simultaneously opens the sequence valve 153 of the differential control part 150, the oil in the third chamber 121-1a of the push shovel cylinder 121-1 is communicated with the oil storage and supply part 110 through the sequence valve 153, i.e. when compressing garbage, the push shovel cooperates with the sliding plate to compress the garbage to a certain compression ratio.
Example seven:
on the basis of the sixth embodiment, referring to fig. 1 to 8, the reversing valve 151 is a plate-type electromagnetic reversing valve; and/or, sequence valve 153 is a cartridge sequence valve.
The differential control unit 150 is further provided with a check valve 152, and the check valve 152 is disposed between the switching valve 151 and the sequence valve 153 to limit a flow direction of the oil in the differential control unit 150.
By selecting the plate type electromagnetic directional valve as the directional valve 151, the cartridge type check valve as the check valve 152, and the mounted type sequence valve as the sequence valve 153, the differential control unit 150 can be made to exhibit the optimum speed-up function while simplifying the structure of the differential control unit 150.
Example eight:
1-9, the skateboard power section 122 and/or the blade power section 123 includes: the buffer cylinder 170, the buffer cylinder 170 is provided with a buffer cavity 171 and a buffer block 172.
Oil cylinders are arranged on the sliding plate power part 122 and the scraper power part 123, and the sliding plate and the scraper move under the driving of the oil cylinders. When the common oil cylinder is impacted by high-speed load, the piston and the piston rod move rapidly, so that the support stability is low, meanwhile, the rapid movement of the piston can cause the pressure of hydraulic oil in an oil cavity to change rapidly, the impact on the piston and a cylinder body assembly is overlarge, and the fatigue failure of the oil cylinder is easily caused. In the embodiment, the common oil cylinders in the slide plate power part 122 and the scraper power part 123 are replaced by the buffer oil cylinder 170, so that the influence of impact on the hydraulic components can be effectively reduced. Be provided with cushion chamber 171 and buffer block 172 on cushion cylinder 170, when receiving load impact, buffer block 172 inserts in the cushion chamber 171, the surface of buffer block 172 and the internal surface of cushion chamber 171 form annular damping hole (wherein the external diameter of buffer block 172 is less than the internal diameter of cushion chamber 171), the hydraulic oil of work intracavity receives the slow buffer chamber 171 that flows out of damping effect of damping hole, thereby the translation rate of piston has been slowed down, cushioning effect has been played, the impact of fluid to the oil cylinder subassembly has been reduced, the support stability of hydro-cylinder has been improved, the fatigue failure of hydro-cylinder has been delayed, the life of hydro-cylinder has been promoted.
Example nine:
on the basis of the eighth embodiment, referring to fig. 1 to 9, the buffer chamber 171 includes: a first buffer chamber 171-1, the first buffer chamber 171-1 is disposed between the bottom 173 of the buffer cylinder 170 and the piston rod 174; the second buffer chamber 171-2, the second buffer chamber 171-2 is arranged on the cylinder top sleeve 175 of the buffer cylinder 170; the buffer block 172 includes: the first buffer block 172-1, the first buffer block 172-1 is arranged on one side of the piston 176 of the buffer cylinder 170 close to the cylinder bottom 173; and a second buffer block 172-2, wherein the second buffer block 172-2 is arranged at one side of the piston 176 of the buffer cylinder 170 close to the cylinder top sleeve 175.
When the buffer cylinder 170 is impacted by a load to cause the piston 176 to move rapidly, if the piston 176 moves towards the cylinder bottom 173, the first buffer block 172-1 is inserted into the first buffer cavity 171-1, the outer surface of the first buffer block 172-1 and the inner surface of the first buffer cavity 171-1 form an annular damping hole, and hydraulic oil in the working cavity slowly flows out of the first buffer cavity 171-1 under the damping action of the damping hole; if the piston 176 moves towards the cylinder top cover 175, the second buffer block 172-2 is inserted into the second buffer chamber 171-2, the outer surface of the second buffer block 172-2 and the inner surface of the second buffer chamber 171-2 form an annular damping hole, and the hydraulic oil in the working chamber slowly flows out of the second buffer chamber 171-2 under the damping action of the damping hole. Due to the design, the buffer is arranged in the two movement directions of the piston 176, the buffer oil cylinder 170 can be comprehensively protected from impact of rapid change of oil pressure on the piston 176 and a cylinder body assembly, the supporting stability of the buffer oil cylinder 170 is improved, the fatigue failure of the buffer oil cylinder 170 is delayed, the service life of the buffer oil cylinder 170 is prolonged, and the buffer oil cylinder 170 is comprehensively protected
Example ten:
referring to fig. 1 to 10, the present embodiment provides a compression-type dust cart 200, and the compression-type dust cart 200 includes the hydraulic device 100 described in the first to ninth embodiments.
The compression garbage truck 200 comprises a hydraulic device 100, a push plate 210, a sliding plate 220, a scraper 230, a hopper 240 and a bucket overturning frame 250. The push plate 210 cooperates with the push shovel power portion 121, the slide plate 220 cooperates with the slide plate power portion 122, the scraper 230 cooperates with the scraper power portion 123, and the bucket-turning frame 250 cooperates with the bucket-turning power portion 125.
In a specific embodiment, the garbage can turning power part 125 controls the garbage can to turn over, and the garbage in the garbage can is poured into the hopper 240, and the sliding plate power part 122 and the scraper blade power part 123 control the sliding plate 220 and the scraper blade 230 to perform a scraping and sliding action, so that the garbage in the hopper 240 is scraped into the compression vehicle; the pushing plate 210 is controlled by the pushing shovel power part 121 to compress the garbage; finally, the lifting power part 124 lifts the hopper 240, and the push plate 210 is pushed out by the push shovel power part 121 to finish the operation of unloading the garbage.
Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.

Claims (10)

1. A hydraulic device for a compression-type refuse collection vehicle, characterized in that the hydraulic device (100) comprises:
the oil storage and supply part (110), the oil storage and supply part (110) is used for providing oil liquid required by the operation of the hydraulic device (100);
a power plant (120), the power plant (120) comprising: a push shovel power part (121), a sliding plate power part (122), a scraper power part (123), a lifting power part (124) and a bucket turning power part (125);
a control valve unit (130), wherein the control valve unit (130) is respectively connected with the oil storage and supply unit (110) and the power device (120), and the control valve unit (130) is used for controlling the oil in the oil storage and supply unit (110) to enter and exit the power device (120);
an oil pump (140), the oil pump (140) being disposed between the oil storage and supply unit (110) and the control valve unit (130), the oil pump (140) being configured to control oil in the oil storage and supply unit (110) to enter the control valve unit (130);
a differential control unit (150), wherein the differential control unit (150) is provided between the slide plate power unit (122) and the control valve unit (130), and the differential control unit (150) is configured to accelerate the operation of the slide plate power unit (122).
2. The hydraulic device according to claim 1, wherein the control valve portion (130) includes:
a first control valve (131), the first control valve (131) being disposed between the blade power section (121) and the oil pump (140);
a second control valve (132), the second control valve (132) disposed between the slide plate power portion (122) and the oil pump (140);
a third control valve (133), the third control valve (133) disposed between the flight power section (123) and the oil pump (140);
a fourth control valve (134), the fourth control valve (134) being disposed between the lift power section (124) and the oil pump (140);
a fifth control valve (135), the fifth control valve (135) is arranged between the barrel-turning power part (125) and the oil pump (140).
3. The hydraulic device according to claim 2, characterized in that the oil pump (140) comprises:
a first oil outlet (141), wherein the first oil outlet (141) is respectively connected with the first control valve (131), the second control valve (132) and the third control valve (133), and the first oil outlet (141) is used for providing oil for the blade power part (121), the slide plate power part (122) and the scraper power part (123);
a second oil outlet (142), wherein the second oil outlet (142) is connected with the fourth control valve (134) and the fifth control valve (135), and the second oil outlet (142) is used for supplying oil to the lifting power part (124) and the bucket overturning power part (125).
4. The hydraulic apparatus according to claim 3, wherein the second oil outlet (142) is further connected to the first control valve (131), the second control valve (132), and the third control valve (133), respectively, and the second oil outlet (142) is further capable of supplying oil to the blade power section (121), the slide plate power section (122), and the flight power section (123).
5. Hydraulic device according to claim 1,
the skateboard power part (122) comprises at least two skateboard cylinders (122-1), and each of the at least two skateboard cylinders (122-1) respectively comprises:
a first chamber (122-1 a);
a second chamber (122-1 b);
the differential control unit (150) includes:
a direction change valve (151);
wherein the direction change valve (151) is connected to the first chamber (122-1a) and the second chamber (122-1b), respectively, the direction change valve (151) being used to directly enter oil of one of the first chamber (122-1a) and the second chamber (122-1b) into the other.
6. Hydraulic device according to claim 5,
the differential control unit (150) further includes:
a sequence valve (153);
the shovel power part (121) comprises a shovel oil cylinder (121-1), and the shovel oil cylinder (121-1) comprises:
a third chamber (121-1 a);
wherein the sequence valve (153) is disposed between the third chamber (121-1a) and the first chamber (122-1 a).
7. Hydraulic device according to claim 6,
the reversing valve (151) is a plate-type electromagnetic reversing valve; and/or
The sequence valve (153) is a cartridge type sequence valve.
8. The hydraulic device according to claim 1, characterized in that the skid power section (122) and/or the screed power section (123) comprises:
the buffer device comprises a buffer oil cylinder (170), wherein a buffer cavity (171) and a buffer block (172) are arranged on the buffer oil cylinder (170).
9. Hydraulic device according to claim 8,
the buffer chamber (171) comprises:
the first buffer cavity (171-1), the first buffer cavity (171-1) is arranged between the cylinder bottom (173) of the buffer oil cylinder (170) and the piston rod (174);
the second buffer cavity (171-2), the second buffer cavity (171-2) is arranged on the top sleeve (175) of the buffer oil cylinder (170);
the buffer block (172) includes:
the first buffer block (172-1), the first buffer block (172-1) is arranged on one side, close to the cylinder bottom (173), of the piston (176) of the buffer oil cylinder (170);
and the second buffer block (172-2), the second buffer block (172-2) is arranged on one side, close to the cylinder top sleeve (175), of the piston (176) of the buffer oil cylinder (170).
10. A compression garbage truck (200) characterized in that it comprises a hydraulic device (100) according to any one of claims 1 to 9.
CN202111646540.3A 2021-12-30 Hydraulic device for compression type garbage truck and compression type garbage truck Active CN114233709B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202111646540.3A CN114233709B (en) 2021-12-30 Hydraulic device for compression type garbage truck and compression type garbage truck

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202111646540.3A CN114233709B (en) 2021-12-30 Hydraulic device for compression type garbage truck and compression type garbage truck

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CN114233709B CN114233709B (en) 2024-07-05

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Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007139142A (en) * 2005-11-22 2007-06-07 Jatco Ltd Automatic transmission
CN201107598Y (en) * 2007-11-22 2008-08-27 深圳东风汽车有限公司 Electric liquor control system of garbage truck
JP2011208779A (en) * 2010-03-30 2011-10-20 Aisin Aw Co Ltd Hydraulic control device
CN102915049A (en) * 2012-10-30 2013-02-06 青岛同辉汽车技术有限公司 Pressure control device of compression refuse collector
CN108412825A (en) * 2017-02-16 2018-08-17 数源科技股份有限公司 The standby enclosed variable speed pump control hydraulic system of installing on a kind of pure electric vehicle compression type garbage truck
CN108644163A (en) * 2018-04-13 2018-10-12 合加新能源汽车有限公司 A kind of garbage truck scrapes slide plate cycle operation hydraulic system
CN109538555A (en) * 2018-12-04 2019-03-29 扬州盛达特种车有限公司 A kind of energy-saving hydraulic system of garbage compression vehicle
CN112253559A (en) * 2020-09-04 2021-01-22 长沙普罗科环境装备有限责任公司 Pressure adjusting hydraulic circuit for compression type garbage truck, control method and compression type garbage truck
CN113482990A (en) * 2021-07-06 2021-10-08 上海熙众新能源技术有限公司 Compression garbage truck and hydraulic system thereof
CN216642601U (en) * 2021-12-30 2022-05-31 启航汽车有限公司 Hydraulic device for compression type garbage truck and compression type garbage truck

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007139142A (en) * 2005-11-22 2007-06-07 Jatco Ltd Automatic transmission
CN201107598Y (en) * 2007-11-22 2008-08-27 深圳东风汽车有限公司 Electric liquor control system of garbage truck
JP2011208779A (en) * 2010-03-30 2011-10-20 Aisin Aw Co Ltd Hydraulic control device
CN102915049A (en) * 2012-10-30 2013-02-06 青岛同辉汽车技术有限公司 Pressure control device of compression refuse collector
CN108412825A (en) * 2017-02-16 2018-08-17 数源科技股份有限公司 The standby enclosed variable speed pump control hydraulic system of installing on a kind of pure electric vehicle compression type garbage truck
CN108644163A (en) * 2018-04-13 2018-10-12 合加新能源汽车有限公司 A kind of garbage truck scrapes slide plate cycle operation hydraulic system
CN109538555A (en) * 2018-12-04 2019-03-29 扬州盛达特种车有限公司 A kind of energy-saving hydraulic system of garbage compression vehicle
CN112253559A (en) * 2020-09-04 2021-01-22 长沙普罗科环境装备有限责任公司 Pressure adjusting hydraulic circuit for compression type garbage truck, control method and compression type garbage truck
CN113482990A (en) * 2021-07-06 2021-10-08 上海熙众新能源技术有限公司 Compression garbage truck and hydraulic system thereof
CN216642601U (en) * 2021-12-30 2022-05-31 启航汽车有限公司 Hydraulic device for compression type garbage truck and compression type garbage truck

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