CN117249128A - Control device of electricity-free bucket changing device for engineering machine - Google Patents

Control device of electricity-free bucket changing device for engineering machine Download PDF

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Publication number
CN117249128A
CN117249128A CN202210654282.1A CN202210654282A CN117249128A CN 117249128 A CN117249128 A CN 117249128A CN 202210654282 A CN202210654282 A CN 202210654282A CN 117249128 A CN117249128 A CN 117249128A
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CN
China
Prior art keywords
pressure
low
oil
pipeline
pressure oil
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Pending
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CN202210654282.1A
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Chinese (zh)
Inventor
黄全善
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Happy Trading Co ltd
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Happy Trading Co ltd
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Filing date
Publication date
Application filed by Happy Trading Co ltd filed Critical Happy Trading Co ltd
Priority to CN202210654282.1A priority Critical patent/CN117249128A/en
Publication of CN117249128A publication Critical patent/CN117249128A/en
Pending legal-status Critical Current

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Classifications

    • 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
    • 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
    • F15B13/06—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with two or more servomotors
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Operation Control Of Excavators (AREA)

Abstract

A control device of an electric-free bucket exchanging device for engineering machines is used for controlling a bucket exchanging device and comprises a valve body, a forearm high-pressure pipeline, a forearm low-pressure pipeline, a high-pressure oil supply loop, a low-pressure oil return loop, a pipeline control axle center and a control rod; the valve body can provide a forearm high-pressure pipeline, a forearm low-pressure pipeline, a high-pressure oil supply loop, a low-pressure oil return loop, a pipeline control axle center and a control rod assembly, and is provided with a forearm high-pressure assembly part, a forearm low-pressure assembly part, a high-pressure oil supply assembly part and a low-pressure oil return assembly part; the hydraulic oil is led to reach the high pressure side of the bucket exchanging device through the high-pressure oil supply loop and the forearm high-pressure pipeline by operating the control rod, and the bucket exchanging device is unfolded; when the bucket device is to be retracted, the hydraulic oil supply is switched, and because the structure of the invention does not need an additional power supply device, the circuit is not required to be checked during faults, the maintenance is quick and rapid, the device is not influenced by external environment pollution, and the service life of the control device can be prolonged.

Description

Control device of electricity-free bucket changing device for engineering machine
Technical Field
The present invention relates to a control device for an electric-free bucket-changing device for engineering tools, and more particularly to a bucket-changing device for engineering tools such as shovels.
Background
Referring to fig. 1, which is a system diagram of a bucket exchanging device of a current engineering machine, in which a bucket exchanging device 200 is arranged at the front end of a front arm of the engineering machine, the bucket exchanging device 200 can be connected with a tool bucket (such as a bucket, a grab bucket and a hydraulic hammer), and referring to fig. 1, a clamping jaw piston 201 driven by hydraulic pressure is arranged in the bucket exchanging device 200, and the flow direction of an oil path is controlled by a control device 400, so that the clamping jaw piston 201 is controlled to be in a loosening and retracting state, and the bucket exchanging device 200 is separated from the tool bucket; or the jaw piston 201 is driven to extend so that the bucket changing device 200 is buckled on the tool bucket for engineering operation.
The bucket-changing control device 200 is mainly controlled by a control device 400 on one side of a cab of an engineering machine, as shown in fig. 1 and 2, the control device 400 is a solenoid valve, and comprises a control oil path A, B with a forearm, a high-pressure oil supply loop P and a low-pressure oil return loop T, wherein the high-pressure oil supply loop P and the low-pressure oil return loop T are connected with an oil cylinder oil path 500 of a foot valve of a crusher or the oil cylinder oil path 500 of the foot valve for controlling the engineering machine to travel, in addition, the control device 400 is connected with an electric control device 501 of the engineering machine, the control device 400 is further connected with an electric switch (such as a key switch, a light switch or a cigarette lighter switch) of the cab by pulling out a circuit outside the electric control device 501 through an electric driving solenoid valve, and then connected with the electric switch through a switch device 502; when the tool bucket is to be combined, the switch device 502 is switched to enable hydraulic oil in the oil cylinder oil path 500 to be sent to the clamping jaw piston 201 from the high-pressure oil supply loop P to the forearm control oil path A, then the hydraulic oil returns to the oil cylinder oil path 500 from the forearm control oil path B through the low-pressure oil return loop T, so that the clamping jaw piston 201 extends outwards, and the tool bucket is clamped with the bucket changing device 200; when the tool bucket is to be replaced, the control oil path A, B of the front arm is switched so that hydraulic oil does not flow to one side of the clamping jaw piston 201, and the clamping jaw piston 201 can retract to separate the tool bucket from the bucket replacing device 200.
However, the control device described above has the following drawbacks:
1. since the working environment of the engineering machine is mostly accompanied with soil, dust and moisture, and the control device 400 is installed at the bottom of the cab, the engineering machine is easily affected by the external environment and is damaged.
2. The electric wires are required to be additionally pulled into the cab, and the problems of short circuit, uneven power distribution, electric leakage and the like are easy to occur when the electric wires are refitted into the electric power circuit, the storage battery of the engineering machine tool is damaged when the electric wires are light, and the problems of burning the engineering machine tool due to abnormal temperature and the like are caused when the electric wires are heavy. In addition, when the distribution line is defective, a burnout of the solenoid valve coil in the control device 400 is affected.
Disclosure of Invention
The invention mainly aims to provide a control device of an electric-free bucket-changing device for engineering tools, and mainly aims to solve the problems that the control device of the bucket-changing device controlled by an electromagnetic valve is easy to be influenced by environmental pollution in the prior art, and the defects of electric energy control and the like of the engineering tools caused by refitting wiring.
Therefore, the structure of the invention is used for controlling a bucket exchanging device, which comprises a valve body, a forearm high-pressure pipeline, a forearm low-pressure pipeline, a high-pressure oil supply loop, a low-pressure oil return loop, a pipeline control axle center and a control rod;
the valve body is arranged at a preset position of an engineering tool, and comprises a connecting plate and a cylindrical valve seat, wherein the valve seat is arranged on the connecting plate, and the connecting plate is locked on the engineering tool through a plurality of bolts; the valve seat is provided with an axial hole along the axial direction, the pipeline is controlled to be axially assembled in the axial hole, a front arm high-pressure assembling part, a front arm low-pressure assembling part, a high-pressure oil supply assembling part and a low-pressure oil return assembling part are formed on the valve seat from the surface to the axial hole direction, the valve seat is divided into two sides along the center of the valve seat, the front arm high-pressure assembling part and the low-pressure oil return assembling part are on the same side, the high-pressure oil supply assembling part and the front arm low-pressure assembling part are on the same side, in addition, the opposite side of the front arm high-pressure oil supply assembling part is the high-pressure oil supply assembling part, and the opposite side of the low-pressure oil return assembling part is the front arm low-pressure assembling part;
the front arm high-pressure pipeline is arranged on the front arm high-pressure assembly part through a front arm high-pressure joint, and the other end of the front arm high-pressure pipeline is arranged on the high-pressure side of a clamping jaw piston of the bucket replacing device;
the forearm low pressure pipeline is arranged at the forearm low pressure assembly part through a forearm low pressure connector, and in addition, the other end of the forearm low pressure pipeline is arranged at the low pressure side of a clamping jaw piston of the bucket replacing device;
the high-pressure oil supply loop is arranged on the high-pressure oil supply assembly part through a high-pressure oil supply joint, and the other end of the high-pressure oil supply loop is arranged on a high-pressure supply part of an oil hydraulic cylinder;
the low-pressure oil return loop is arranged at the low-pressure oil return assembly part through a low-pressure oil return joint, and in addition, the other end of the low-pressure oil return loop is arranged at a low-pressure oil return part of an oil cylinder;
one side of the pipeline control axis is connected with the control rod, and the control rod can control the position of the pipeline control axis; the other end of the pipeline control axle center, which is opposite to the control rod, is arranged in an axle center hole of the valve seat; the surface of the pipeline control axle center is provided with a first oil way, a second oil way and a third oil way, the first oil way and the second oil way are arranged in parallel and are perpendicular to the axle center direction, the first oil way position corresponds to the forearm high-pressure assembly part and the high-pressure oil supply assembly part, the second oil way position corresponds to the low-pressure oil return assembly part and the forearm low-pressure assembly part, the third oil way is arranged along the axle center direction, and the third oil way position corresponds to the forearm high-pressure assembly part and the low-pressure oil return assembly part under the switching operation of the control rod;
when the clamping jaw piston of the bucket replacing device is to be unfolded, the control rod is controlled to enable the first oil path position to correspond to the front arm high-pressure assembling part and the high-pressure oil supply assembling part, the second oil path position to correspond to the low-pressure oil return assembling part and the front arm low-pressure assembling part, hydraulic oil passes through the high-pressure oil supply circuit, the front arm high-pressure assembling part, the high-pressure oil supply assembling part and the front arm high-pressure pipeline from the oil cylinder high-pressure supplying part and then reaches the high-pressure side of the clamping jaw piston, the clamping jaw piston is pushed to extend outwards, hydraulic oil then passes through the low-pressure side of the clamping jaw piston, the front arm low-pressure pipeline, the front arm low-pressure assembling part and the low-pressure oil return circuit to reach the oil cylinder low-pressure oil return part, and meanwhile, the hydraulic oil is circulated to enable the clamping jaw piston to keep a pushing-away state;
when the clamping jaw piston of the bucket replacing device is to be retracted, the control rod is controlled to enable the third oil path position to correspond to the front arm high-pressure assembly part and the low-pressure oil return assembly part, and no hydraulic oil is supplied to the clamping jaw piston at the moment, so that the clamping jaw piston loses hydraulic pressure and is retracted backwards; therefore, the bucket replacement program of the bucket replacement device can be carried out without electric power.
In an embodiment of the invention, the high-pressure supply part of the hydraulic cylinder and the low-pressure return part of the hydraulic cylinder are connected to a foot valve oil path of a crusher of the engineering machine through a three-way joint.
In an embodiment of the present invention, the high-pressure supply portion and the low-pressure return portion are connected to a pedal valve oil path of the engineering machine for controlling travel through a three-way joint.
In the embodiment of the invention, the control rod can be connected to the cab of the engineering machine through a control pull rope, the other end of the control pull rope is connected with the pipeline control axle center, and the control pull rope drives the pipeline control axle center to rotate by operating the control rod arranged in the cab.
Through the above description, the beneficial effects of the invention are as follows:
1. because the structure of the invention does not need power supply, no extra power loss is needed, and an inspection circuit is not needed during maintenance, thereby reducing maintenance time and prolonging the service life of the engineering tool control device.
2. The hydraulic oil flow direction is controlled by adopting a pure mechanical structure, so that the hydraulic oil flow direction is not influenced by environmental pollution, the failure rate of the control device can be greatly reduced, and the service life of the control device can be prolonged.
Drawings
The invention will be described in further detail with reference to the drawings and the detailed description.
FIG. 1 is a system diagram of a prior art bucket changer;
FIG. 2 is a schematic structural view of a control device of a conventional bucket exchange device;
FIG. 3 is a system diagram of the present invention;
fig. 4 is a structural view of the control device;
FIG. 5 is an exploded view of the control device;
FIG. 6 is an exploded view of the other view of FIG. 5;
FIG. 7 is a schematic diagram of the control device controlling the bucket exchange device to extend the jaw piston;
fig. 8 is a schematic diagram of the action of the control device to control the bucket changer to retract the jaw piston.
Description of the reference numerals
100 control means;
1, a valve body;
11, connecting plates;
12 valve seats;
13 axle center holes;
14 a forearm high pressure assembly;
15 forearm low pressure assembly;
16 high pressure oil supply assembly;
17 a low pressure return oil assembly;
2, a forearm high-pressure pipeline;
a 21 forearm high pressure joint;
3 forearm low pressure line;
31 forearm low pressure joint;
4, a high-pressure oil supply loop;
41 high pressure oil supply connection;
5 a low-pressure oil return loop;
51 low pressure return connection;
6, controlling the axis of the pipeline;
61 a first oil path;
62 a second oil path;
63 a third oil passage;
7, a control rod;
200 bucket changing devices;
201 jaw piston;
202 high pressure side;
203 low pressure side;
301 a hydraulic cylinder high-pressure supply unit;
302 a low-pressure oil return part of the oil hydraulic cylinder;
Prior Art
200 bucket changing devices;
201 jaw piston;
400 control means;
A. b, controlling an oil way;
p high-pressure oil supply loop;
a T low-pressure oil return loop;
500 oil cylinder oil paths;
501 an electric control device;
502 switching means.
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways other than those described herein, and persons skilled in the art will readily appreciate that the present invention is not limited to the specific embodiments disclosed below.
Referring to fig. 3 to 6, a control device 100 of an electric-free bucket exchanging device for engineering machinery according to the present invention is used for controlling a bucket exchanging device 200, which includes a valve body 1, a forearm high-pressure pipeline 2, a forearm low-pressure pipeline 3, a high-pressure oil supply circuit 4, a low-pressure oil return circuit 5, a pipeline control shaft 6 and a control lever 7.
As shown in fig. 3 to 6, the valve body 1 is mounted at a predetermined position of an engineering tool, the valve body 1 includes a connecting plate 11 and a cylindrical valve seat 12, the valve seat 12 is disposed on the connecting plate 11, and the connecting plate 11 is locked to the engineering tool by a plurality of bolts; the valve seat 12 is provided with an axial hole 13 along the axial direction, the axial hole 13 provides the pipeline control axial center 6, the pipeline control axial center 6 is assembled in the axial hole 13, the valve seat 12 forms a front arm high-pressure assembling part 14, a front arm low-pressure assembling part 15, a high-pressure oil supply assembling part 16 and a low-pressure oil return assembling part 17 from the surface to the axial hole 13, the front arm high-pressure assembling part 14 and the low-pressure oil return assembling part 17 are separated into two sides along the center of the valve seat 12, the front arm high-pressure assembling part 14 and the front arm low-pressure assembling part 17 are on the same side, the high-pressure oil supply assembling part 16 and the front arm low-pressure assembling part 15 are on the opposite side of the front arm high-pressure assembling part 14, the opposite side of the low-pressure oil return assembling part 17 is the front arm low-pressure assembling part 15.
As shown in fig. 3 to 5, the forearm high pressure line 2 is mounted on the forearm high pressure assembly portion 14 through a forearm high pressure fitting 21, and the other end of the forearm high pressure line 2 is mounted on the high pressure side 202 of a jaw piston 201 of the bucket changer 200.
As shown in fig. 3 to 5, the forearm low pressure line 3 is mounted to the forearm low pressure assembly portion 15 through a forearm low pressure fitting 31, and the other end of the forearm low pressure line 3 is mounted to the low pressure side 203 of a jaw piston 201 of the bucket exchange device 200.
As shown in fig. 3 to 5, the high-pressure oil supply circuit 4 is mounted on the high-pressure oil supply assembly 16 through a high-pressure oil supply joint 41, and the other end of the high-pressure oil supply circuit 4 is mounted on a hydraulic cylinder high-pressure supply portion 301, and the hydraulic cylinder high-pressure supply portion 301 is connected to a foot valve oil passage of a crusher of the engineering machine through a three-way joint or to a foot valve oil passage of a control travel of the engineering machine through a three-way joint.
As shown in fig. 3 to 5, the low pressure oil return circuit 5 is mounted to the low pressure oil return assembly 17 through a low pressure oil return joint 51, and the other end of the low pressure oil return circuit 5 is mounted to a cylinder low pressure oil return portion 302; the low-pressure return portion 302 of the hydraulic cylinder is connected to a foot valve oil passage of a breaker of the engineering machine through a three-way joint or to a foot valve oil passage of the engineering machine that controls traveling through a three-way joint.
As shown in fig. 4 to 8, one side of the pipe control shaft 6 is connected to the control lever 7, and the control lever 7 can control the position of the pipe control shaft 6; the other end of the pipeline control axle center 6 opposite to the control rod 7 is arranged in an axle center hole 13 of the valve seat 12; the surface of the pipeline control shaft 6 is provided with a first oil path 61, a second oil path 62 and a third oil path 63, the first oil path 61 and the second oil path 62 are arranged in parallel and perpendicular to the shaft center direction, the first oil path 61 corresponds to the forearm high pressure assembly portion 14 and the high pressure oil supply assembly portion 16, the second oil path 62 corresponds to the low pressure oil return assembly portion 17 and the forearm low pressure assembly portion 15, the third oil path 63 is arranged along the shaft center direction, and the third oil path 63 corresponds to the forearm high pressure assembly portion 14 and the low pressure oil return assembly portion 17 under the operation of the control lever 7.
The above description is the description of each part of the present invention, and the following description will explain the use mode and the beneficial effects of the present invention.
As shown in fig. 7, when the claw piston 201 of the bucket changer 200 is to be deployed so that a tool bucket can be assembled in the bucket changer 200, the control lever 7 is manipulated so that the first oil path 61 is positioned corresponding to the forearm high pressure assembly portion 14 and the high pressure oil supply assembly portion 16, the second oil path 62 is positioned corresponding to the low pressure oil return assembly portion 17 and the forearm low pressure assembly portion 15, hydraulic oil passes from the cylinder high pressure supply portion 301 to the high pressure side 202 of the claw piston 201 after passing through the high pressure oil supply circuit 4, the forearm high pressure assembly portion 14, the high pressure oil supply assembly portion 16 and the forearm high pressure line 2, the claw piston 201 is extended, and then hydraulic oil passes from the low pressure side 203 of the claw piston 201, the forearm low pressure line 3, the forearm low pressure assembly portion 15 and the low pressure oil return circuit 5 to the cylinder low pressure oil return portion 302, while the hydraulic oil is circulated so that the claw piston 200 is kept in an extended state.
As shown in fig. 8, when the jaw piston 201 of the bucket changer 200 is to be retracted to enable the bucket changer to release the tool bucket, the control rod 7 is operated to enable the third oil path 63 to be positioned corresponding to the forearm high pressure assembly portion 14 and the low pressure oil return assembly portion 17, no hydraulic oil is supplied to the jaw piston 201, so that the jaw piston 201 loses hydraulic pressure and is retracted backwards; therefore, the bucket exchanging process of the bucket exchanging device 200 can be performed without electric power.
In addition, the control rod 7 may be connected to the cab of the engineering machine through a control rope (not shown), while the other end of the control rope is connected to the pipe control shaft 6, and by operating the control rod 7 disposed in the cab, the control rope drives the pipe control shaft 6 to rotate, so as to obtain the control of the bucket exchanging device 200.
The foregoing description is only of the preferred embodiments of the invention, and it is apparent that the embodiments described are merely some, but not all, of the embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

Claims (4)

1. The control device of the electric-free bucket exchanging device for the engineering machine is characterized by comprising a valve body, a forearm high-pressure pipeline, a forearm low-pressure pipeline, a high-pressure oil supply loop, a low-pressure oil return loop, a pipeline control axle center and a control rod;
the valve body is arranged at a preset position of an engineering tool, and comprises a connecting plate and a cylindrical valve seat, wherein the valve seat is arranged on the connecting plate, and the connecting plate is locked on the engineering tool through a plurality of bolts; the valve seat is provided with an axial hole along the axial direction, the pipeline is controlled to be axially assembled in the axial hole, a front arm high-pressure assembling part, a front arm low-pressure assembling part, a high-pressure oil supply assembling part and a low-pressure oil return assembling part are formed on the valve seat from the surface to the axial hole direction, the valve seat is divided into two sides along the center of the valve seat, the front arm high-pressure assembling part and the low-pressure oil return assembling part are on the same side, the high-pressure oil supply assembling part and the front arm low-pressure assembling part are on the same side, in addition, the opposite side of the front arm high-pressure oil supply assembling part is the high-pressure oil supply assembling part, and the opposite side of the low-pressure oil return assembling part is the front arm low-pressure assembling part;
the front arm high-pressure pipeline is arranged on the front arm high-pressure assembly part through a front arm high-pressure joint, and the other end of the front arm high-pressure pipeline is arranged on the high-pressure side of a clamping jaw piston of the bucket replacing device;
the forearm low pressure pipeline is arranged at the forearm low pressure assembly part through a forearm low pressure connector, and in addition, the other end of the forearm low pressure pipeline is arranged at the low pressure side of a clamping jaw piston of the bucket replacing device;
the high-pressure oil supply loop is arranged on the high-pressure oil supply assembly part through a high-pressure oil supply joint, and the other end of the high-pressure oil supply loop is arranged on a high-pressure supply part of an oil hydraulic cylinder;
the low-pressure oil return loop is arranged at the low-pressure oil return assembly part through a low-pressure oil return joint, and in addition, the other end of the low-pressure oil return loop is arranged at a low-pressure oil return part of an oil cylinder;
one side of the pipeline control axis is connected with the control rod, and the control rod can control the position of the pipeline control axis; the other end of the pipeline control axle center, which is opposite to the control rod, is arranged in an axle center hole of the valve seat; the surface of the pipeline control axle center is provided with a first oil way, a second oil way and a third oil way, the first oil way and the second oil way are arranged in parallel and are perpendicular to the axle center direction, the first oil way position corresponds to the forearm high-pressure assembly part and the high-pressure oil supply assembly part, the second oil way position corresponds to the low-pressure oil return assembly part and the forearm low-pressure assembly part, the third oil way is arranged along the axle center direction, and the third oil way position corresponds to the forearm high-pressure assembly part and the low-pressure oil return assembly part through the operation of the control rod;
when the clamping jaw piston of the bucket replacing device is to be unfolded, the control rod is controlled to enable the first oil path position to correspond to the front arm high-pressure assembling part and the high-pressure oil supply assembling part, the second oil path position to correspond to the low-pressure oil return assembling part and the front arm low-pressure assembling part, hydraulic oil passes through the high-pressure oil supply circuit, the front arm high-pressure assembling part, the high-pressure oil supply assembling part and the front arm high-pressure pipeline from the oil cylinder high-pressure supplying part and then reaches the high-pressure side of the clamping jaw piston, the clamping jaw piston is pushed to extend outwards, hydraulic oil then passes through the low-pressure side of the clamping jaw piston, the front arm low-pressure pipeline, the front arm low-pressure assembling part and the low-pressure oil return circuit to reach the oil cylinder low-pressure oil return part, and meanwhile, the hydraulic oil is circulated to enable the clamping jaw piston to keep a pushing-away state;
when the clamping jaw piston of the bucket replacing device is to be retracted, the control rod is controlled to enable the third oil path position to correspond to the front arm high-pressure assembly part and the low-pressure oil return assembly part, and no hydraulic oil is supplied to the clamping jaw piston at the moment, so that the clamping jaw piston loses hydraulic pressure and is retracted backwards; therefore, the bucket replacement program of the bucket replacement device can be carried out without electric power.
2. The control device of the electric-free bucket changing device for the engineering machine according to claim 1, wherein the high-pressure supply part of the hydraulic cylinder and the low-pressure return part of the hydraulic cylinder are connected to a foot valve oil path of a crusher of the engineering machine through a three-way joint.
3. The control device of the electric-free bucket changer for engineering equipment according to claim 1, wherein the high-pressure supply part of the hydraulic cylinder and the low-pressure return part of the hydraulic cylinder are connected to a pedal valve oil path of the engineering equipment for controlling traveling through a three-way joint.
4. The control device of the power-free bucket changer for engineering equipment of claim 1, wherein the control rod is connected to the cab of the engineering equipment through a control pull rope, the other end of the control pull rope is connected with the pipeline control shaft center, and the control pull rope drives the pipeline control shaft center to rotate by operating the control rod arranged in the cab.
CN202210654282.1A 2022-06-10 2022-06-10 Control device of electricity-free bucket changing device for engineering machine Pending CN117249128A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202210654282.1A CN117249128A (en) 2022-06-10 2022-06-10 Control device of electricity-free bucket changing device for engineering machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210654282.1A CN117249128A (en) 2022-06-10 2022-06-10 Control device of electricity-free bucket changing device for engineering machine

Publications (1)

Publication Number Publication Date
CN117249128A true CN117249128A (en) 2023-12-19

Family

ID=89126950

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202210654282.1A Pending CN117249128A (en) 2022-06-10 2022-06-10 Control device of electricity-free bucket changing device for engineering machine

Country Status (1)

Country Link
CN (1) CN117249128A (en)

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