CN112875528A - Crane boom and automobile crane - Google Patents
Crane boom and automobile crane Download PDFInfo
- Publication number
- CN112875528A CN112875528A CN202110330494.XA CN202110330494A CN112875528A CN 112875528 A CN112875528 A CN 112875528A CN 202110330494 A CN202110330494 A CN 202110330494A CN 112875528 A CN112875528 A CN 112875528A
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- Prior art keywords
- boom
- telescopic
- bolt
- oil
- master control
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- 239000000725 suspension Substances 0.000 claims abstract description 26
- 239000003921 oil Substances 0.000 claims description 101
- 238000001514 detection method Methods 0.000 claims description 29
- 239000010720 hydraulic oil Substances 0.000 claims description 22
- 230000001960 triggered effect Effects 0.000 claims description 11
- 238000000034 method Methods 0.000 abstract description 4
- 229910000831 Steel Inorganic materials 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 230000002457 bidirectional effect Effects 0.000 description 2
- 230000008602 contraction Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000009191 jumping Effects 0.000 description 2
Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
- B66C23/04—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes with jibs the effective length of which is variable in operation, e.g. longitudinally displaceable, extensible
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
- B66C23/18—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes specially adapted for use in particular purposes
- B66C23/36—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes specially adapted for use in particular purposes mounted on road or rail vehicles; Manually-movable jib-cranes for use in workshops; Floating cranes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
- B66C23/62—Constructional features or details
- B66C23/64—Jibs
- B66C23/70—Jibs constructed of sections adapted to be assembled to form jibs or various lengths
- B66C23/701—Jibs constructed of sections adapted to be assembled to form jibs or various lengths telescopic
- B66C23/708—Jibs constructed of sections adapted to be assembled to form jibs or various lengths telescopic locking devices for telescopic jibs
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
- B66C23/88—Safety gear
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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
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/08—Servomotor systems incorporating electrically operated control means
- F15B21/087—Control strategy, e.g. with block diagram
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Engineering & Computer Science (AREA)
- Jib Cranes (AREA)
Abstract
The invention relates to a crane, aiming at solving the problem that the suspension arm fixing process of the existing automobile crane boom is more complicated; providing a cargo boom and an automobile crane, wherein the cargo boom comprises a plurality of sections of suspension arms, each suspension arm comprises a basic arm and telescopic arms which are sequentially sleeved, each section of suspension arm is provided with a limiting hole, and the limiting holes on the sections of suspension arms are coaxially aligned when all the telescopic arms are in a non-extending state; the basic arm is provided with a bolt device, and the bolt device comprises a bolt which can be plugged in and pulled out of a limiting hole and a driving device for pushing and pulling the bolt in and pulled out of the limiting hole. In the invention, after the telescopic boom retracts, the limiting holes on all the boom arms are coaxially aligned, and the bolt is inserted into the limiting holes to fixedly connect the boom arms together, so that the telescopic boom is prevented from moving outwards under the action of inertia when the boom moves along with the crane, and safety accidents are avoided. The telescopic arm is fixed through the bolt, and the operation is simple and convenient.
Description
Technical Field
The invention relates to a crane, in particular to a crane boom and a truck crane.
Background
The telescopic system of the suspension arm of the automobile crane below the level of hundreds of tons is realized by adding a rope row to a telescopic oil cylinder. In the industry, a tonnage five-section arm automobile crane generally adopts a double hydraulic oil cylinder and a steel wire rope row to realize the extension and contraction of a five-section arm. The I telescopic oil cylinder is fixed on the basic arm, the II telescopic oil cylinder is fixed on the two-section arm, the telescopic action of the two-section arm relative to the basic arm is controlled by the I telescopic oil cylinder, and the telescopic action of the three, four and five-section arms relative to the two-section arm is controlled by the II telescopic oil cylinder and a steel wire rope row.
The telescopic oil cylinder is connected with the telescopic arm, the telescopic oil cylinder pushes the telescopic arm to stretch, and a balance valve is arranged on the telescopic oil cylinder. When the telescopic boom extends, hydraulic oil enters the large cavity of the oil cylinder through the one-way valve in the balance valve, and the piston rod of the telescopic oil cylinder extends out to drive the telescopic boom to extend out. When the piston rod of the telescopic oil cylinder stops extending out, the one-way valve in the balance valve is closed, oil in the telescopic oil cylinder is prevented from returning to cause retraction of the piston rod of the telescopic oil cylinder, and the pressure maintaining function is achieved. When the telescopic arm needs to retract, pressure oil needs to be filled into a small cavity of the telescopic oil cylinder, the pressure oil enters the small cavity of the telescopic oil cylinder from a telescopic arm working oil port, meanwhile, the pressure oil in one path pushes the balance valve to open the one-way valve in the balance valve, oil in a large cavity of the telescopic oil cylinder returns, the telescopic oil cylinder retracts of the rear lever piston rod under the action of the pressure oil in the small cavity, when the telescopic oil cylinder stops retracting, the pressure oil in the telescopic arm working oil port needs to return oil, the pressure in the small cavity of the telescopic oil cylinder is released, the one-way valve in the balance valve is closed, and the balance valve continues to perform pressure maintaining protection on the large cavity of the telescopic. If the arm-retracting working oil port is not communicated with return oil, the balance valve cannot return, and pressure maintaining protection can not be carried out on the oil cylinder and the suspension arm. In conclusion, just because the small cavity oil of the telescopic oil cylinder is communicated with the return oil, when the vehicle is parked, the telescopic arm pulls the piston rod of the telescopic oil cylinder to be extended under the inertia effect, and the small cavity of the telescopic oil cylinder is directly communicated with the return oil through the telescopic arm working oil port without the non-return function, so that the piston rod of the telescopic oil cylinder is extended, the telescopic arm is extended and cannot return to the original position, and the fault phenomenon that the telescopic arm is extended outwards occurs.
According to the operation characteristics of the crane, when the vehicle does not operate and runs on a road, the head of the suspension arm is required to be fixedly bound by the hook through a steel wire rope and is fixed at the position of the frame or the head of the vehicle. When the vehicle brakes during running, the telescopic arm consists of a plurality of sections of arms, and the telescopic oil cylinder is driven to extend outwards by the inertia of the telescopic arm. The telescopic arm is fixed by fixing the steel wire rope and the lifting hook, and does not extend outwards under the inertia effect. However, the fixing process of the telescopic boom and the lifting hook is complicated, so that when the automobile crane is transferred in a short distance, an operator cannot fix the lifting hook, and the telescopic boom is extended outwards due to inertia, so that the fault of outward movement of the telescopic boom is caused.
Disclosure of Invention
The invention aims to solve the technical problem that the suspension arm fixing process of the existing automobile crane arm is complicated, and provides a crane arm and an automobile crane, which simplify the suspension arm fixing process, facilitate the operation personnel to fix the suspension arm and reduce safety accidents.
The technical scheme for realizing the purpose of the invention is as follows: the crane boom comprises a plurality of sections of crane booms, wherein each crane boom comprises a basic boom and telescopic booms which are sequentially sleeved, and the crane boom is characterized in that each section of crane boom is provided with a limiting hole, and the limiting holes on each section of crane boom are coaxially aligned when all the telescopic booms are not in an extending state; and a bolt device is arranged on the basic arm, and comprises a bolt which can be plugged in and pulled out of the limiting hole and a driving device for pushing and pulling the bolt in and pulled out of the limiting hole. According to the telescopic boom, after the boom retracts, the limiting holes in all the boom are coaxially aligned, the bolt is inserted into the limiting holes to fixedly connect the boom together, and the telescopic boom is prevented from moving outwards under the action of inertia when the boom moves along with the crane, so that safety accidents are avoided. The telescopic arm and the basic arm are pinned through the bolt, and the telescopic arm and the basic arm are simple to operate and convenient to operate.
In the crane boom, the bolt is in clearance fit with the limiting hole, the fit clearance is small, and the movement between the crane booms is reduced.
In the cargo boom, the driving device comprises a driving executing part for driving the bolt to move and a control system for controlling the driving executing part, the bolt device comprises a cylindrical mounting seat, the end part of the mounting seat is fixed on the basic boom, and the bolt and the driving executing part are mounted in the mounting seat.
In the boom of the invention, the driving executive component is a motor, and the control system is a control circuit for controlling the forward and reverse rotation of the motor. Or the driving executive part is a hydraulic oil cylinder, and the control system is a hydraulic control oil way for controlling the hydraulic oil cylinder to stretch.
In the cargo boom, the hydraulic control oil path comprises a telescopic switching control valve, a two-way hydraulic lock connected between the telescopic switching control valve and a hydraulic oil cylinder, a hydraulic pump for switching the control valve to the telescopic switching, and a hydraulic oil tank connected with the hydraulic pump. The telescopic switching control valve is a three-position four-way electromagnetic valve and can also be a mechanical valve operated by a handle.
In the cargo boom, the hydraulic control oil path also comprises a master control electromagnetic valve, the oil inlet end of the master control electromagnetic valve is connected with a hydraulic pump, the first oil outlet end of the master control electromagnetic valve is connected with the oil inlet end of a telescopic switching control valve, and the second oil outlet end of the master control electromagnetic valve is connected with a pilot control oil path; the oil inlet end of the master control electromagnetic valve is communicated with the first oil outlet end and the second oil outlet end simultaneously when the master control electromagnetic valve is in the left position, the oil inlet end of the master control electromagnetic valve is communicated with the first oil outlet end when the master control electromagnetic valve is in the right position, and the second oil outlet end is cut off. When the master control electromagnetic valve works in the left position, the plug-in operation of the plug pin can be carried out, and the getting-on action operation can also be carried out. When the master control electromagnetic valve works at the right position, the plug-in and pull-out action of the plug pin can be only carried out, and the boarding action is forbidden due to the cut-off of the pilot control oil way, so that the boarding locking is realized.
In the cargo boom, the bolt device also comprises a bolt position marking device, the bolt position marking device comprises an extension position detection switch and a retraction position detection switch which are linked with the position of the bolt, and the extension position detection switch and the retraction position detection switch are respectively connected with a position indicator lamp. The position of the oil cylinder is marked through the indication of the position indicating lamp, so that an operator can conveniently know whether the suspension arm is fixed.
In the crane boom, the retraction-in-place detection switch is linked with the master control electromagnetic valve, namely the plug is retracted in place to be triggered, and the master control electromagnetic valve works in the left position; the bolt is retracted not in place, and the master control electromagnetic valve works in the free position when the retraction in place detection switch is not triggered.
The technical scheme for realizing the purpose of the invention is as follows: a truck crane is provided, which is characterized by comprising the crane arm.
Compared with the prior art, the invention has the advantages that the bolt can fixedly connect the suspension arms together after the suspension arms retract, and the suspension arms are prevented from jumping outwards, so that safety accidents are avoided, and the operation of locking the suspension arms is simple and convenient.
Drawings
Fig. 1 is a schematic view of a truck crane according to the present invention.
Fig. 2 is a schematic structural view of a crane boom in the invention when the telescopic boom is extended.
Fig. 3 is a schematic structural diagram of a crane arm in the invention when the telescopic arm is retracted.
FIG. 4 is a schematic diagram of the connection between the hydraulic oil cylinder and the hydraulic control oil circuit of the boom of the present invention.
FIG. 5 is an electrical schematic of the latch assembly control of the present invention.
Fig. 6 is a structural view of the boom of the present invention in a boom locked state.
Fig. 7 is a structural view of the boom of the present invention in a boom released state.
Part names and serial numbers in the figure:
the crane boom comprises a crane boom 1, a basic boom 11, a telescopic boom 12, a limit hole 13, a bolt device 2, a mounting seat 21, a bolt 22, a sensing part 221, a hydraulic oil cylinder 23, an extension position detection switch 24, a retraction position detection switch 25, a hydraulic oil tank 31, a hydraulic pump 32, a telescopic switching control valve 33, a bidirectional hydraulic lock 34, a master control electromagnetic valve 35, an overflow valve 36 and a pilot oil path 37
Detailed Description
The following description of the embodiments refers to the accompanying drawings.
As shown in fig. 1, a crane boom 1 is mounted on a crane truck. As shown in fig. 2 and fig. 3, the boom 1 is composed of a plurality of sections of booms, wherein one section of boom is a basic boom 11, the other sections of booms are telescopic booms 12 which are sequentially sleeved in the basic boom, and the telescopic booms 12 are driven to extend and retract through a telescopic oil cylinder and a rope row.
As shown in FIG. 2 and FIG. 3, each section of the suspension arm is provided with a limiting hole 13, and the base arm 11 is provided with the bolt device 2. When the telescopic booms 12 are not extended out, the limiting holes 13 on the boom arms are coaxially aligned.
The bolt device 2 comprises a bolt 22 which can be inserted into and pulled out of the limiting hole 13, a driving device for pushing and pulling the bolt 22 to be inserted into and pulled out of the limiting hole, and a mounting seat 21. The drive means includes a drive actuator for driving movement of the bolt 22 and a control system for controlling the drive actuator. The mounting seat 21 is cylindrical and has its end fixed to the base arm 11, and the plug 22 and the driving actuator are mounted in the mounting seat. After the bolt is inserted into the limiting hole, the bolt is in clearance fit with the limiting hole.
In this embodiment, the driving actuator is a hydraulic cylinder 23, and the control system is a hydraulic control oil circuit for controlling the hydraulic cylinder 23 to extend and retract. In practical application, the driving executing part can also be a motor, the control system is a control circuit for controlling the forward and reverse rotation of the motor, and the forward and reverse rotation of the motor pushes the bolt to move telescopically relative to the basic arm.
As shown in fig. 4, the hydraulic control oil path includes an expansion/contraction switching control valve 33, a bidirectional hydraulic lock 34, a hydraulic pump 32, a hydraulic oil tank 31, a master control solenoid valve 35, and an overflow valve 36.
The telescopic switching control valve 33 is a three-position four-way electromagnetic valve, the two-way hydraulic lock 34 is connected between the telescopic switching control valve 33 and the hydraulic oil cylinder 23, and the two-way hydraulic lock 34 is formed by combining two hydraulic control check valves, so that the hydraulic oil cylinder 23 can be stretched only under the pushing of hydraulic oil, and an external force is applied to a piston rod of the hydraulic oil cylinder to prevent the hydraulic oil cylinder from stretching.
The oil inlet end of the master control electromagnetic valve 35 is connected with the hydraulic pump 32, the first oil outlet end is connected with the oil inlet end of the telescopic switching control valve 33, and the second oil outlet end is used for being connected with a pilot control oil path 37, namely, the pilot control oil path of the hydraulic system of the crane on the vehicle; when the master control electromagnetic valve is positioned at the right position, the oil inlet end is communicated with the first oil outlet end, and the second oil outlet end is cut off. When the master control electromagnetic valve works in the left position, the plug-in operation of the plug pin can be carried out, and the getting-on action operation can also be carried out. When the master control electromagnetic valve works at the right position, the plug-in and pull-out action of the plug pin can be only carried out, and the boarding action is forbidden due to the cut-off of the pilot control oil way, so that the boarding locking is realized.
As shown in fig. 2, the latch mechanism 2 further includes a latch position indicating mechanism including an extended position detecting switch 24 and a retracted position detecting switch 25 linked to the position of the latch, and the extended position detecting switch 24 and the retracted position detecting switch 25 are each connected to a position indicating lamp. The extension position detection switch 24 and the retraction position detection switch 25 are mounted on the mount base 21 and arranged at intervals in the moving direction of the plug 22. When the inserted pin 22 is pushed by the hydraulic cylinder 23 to be inserted into the limiting hole 13 of each boom, as shown in fig. 6, the sensing part 221 on the inserted pin 22 senses the reach detection switch 24, so that the reach detection switch 24 is triggered to be closed, and accordingly the retract detection switch 25 is in an open state. When the inserted pin 22 is pulled by the hydraulic cylinder to be completely withdrawn from the limiting holes 13 of the telescopic arms, as shown in fig. 7, the sensing part 221 on the inserted pin 22 senses the retraction position detecting switch 25, so that the retraction position detecting switch 25 is triggered to be closed, and correspondingly, the extension position detecting switch 24 is disconnected.
As shown in fig. 5, in the present embodiment, the extension position detection switch 24 is used to determine whether the hydraulic cylinder has been extended to the position, that is, whether the pin 22 is inserted into the position limiting holes 13 of all the telescopic arms. When the latch 22 is extended to the right position, the sensing part 221 on the latch 22 triggers and closes the extension detection switch 24, the relay K1 is triggered, and the extension indicator light L1 indicating that the telescopic arm 12 is locked is turned on.
The retraction position detection switch 25 is linked with the master control electromagnetic valve 35, and the retraction position detection switch 25 is used for judging whether the hydraulic oil cylinder 23 is retracted to the position. When the plug 22 exits from the limiting holes 13 of all the telescopic booms 12, the retraction position detection switch 25 is triggered to be closed, the relay K2 is triggered, the indicator light L2 for indicating the unlocking of the booms is lightened, meanwhile, the electromagnetic coil Y3 of the master control electromagnetic valve 35 is electrified, the master control electromagnetic valve 35 is in the left position, the oil inlet end of the master control electromagnetic valve is simultaneously communicated with the first oil outlet end and the second oil outlet end, oil of the hydraulic pump flows to the pilot control oil path 37 and the telescopic switching control valve 33 through the master control electromagnetic valve 35, the boarding action is unlocked, and an operator can perform boarding action operations, such as hoisting and lifting of the booms. When the inserted pin 22 is inserted into the limiting holes 13 of all the telescopic arms 12, the sensing part 221 on the inserted pin 22 is away from the sensing area of the retraction-in-place detection switch 25, the retraction-in-place detection switch 25 is turned off, the relay K2 is not triggered, the retraction-in-place indicator lamp L2 is not lit, the electromagnetic coil Y3 of the master control electromagnetic valve 35 is powered off, the oil path from the hydraulic pump 32 to the pilot control oil path 37 is cut off, the boarding action is locked, and the operator cannot perform boarding operation. Therefore, when the bolt is not pulled by the hydraulic oil cylinder to retract to the proper position, the boarding action is forbidden, so that the damage of the bolt device and the damage of the suspension arm system caused by the misoperation of the crane arm under the condition that the suspension arm is locked can be prevented.
In the invention, the locking operation of the suspension arm is as follows: when the bolt 22 is in a retraction in-place state in an initial state, and when all the telescopic arms are in a non-extension state, an operator presses down a locking button, an oil cylinder extension switch S1 is closed, the telescopic switching control valve 33 is in a left position due to the fact that an electromagnetic coil Y1 of the telescopic switching control valve is electrified, oil output by the hydraulic pump 32 enters a large cavity of the hydraulic oil cylinder 23 through the master control electromagnetic valve 35, a left oil way of the telescopic switching control valve 33 and the two-way hydraulic lock 34, a piston rod of the hydraulic oil cylinder 23 extends out, the bolt 22 is pushed to be inserted into the limiting hole 13 of each suspension arm to lock each telescopic arm to prevent the telescopic arms from jumping outside, and meanwhile, an extension indicating lamp L1 for indicating that the telescopic arms 12. When the plug 22 is extended, when the sensing part 221 on the plug 22 leaves the sensing area of the retraction in-place detection switch 25, the retraction in-place detection switch 25 is turned off, the electromagnetic coil Y3 of the master control electromagnetic valve 35 is powered off, the master control electromagnetic valve 35 is switched to the right position, and the boarding action is locked.
The unlocking operation of the boom 12 is as follows: an operator presses an unlocking button, an oil cylinder shrinkage switch S2 is closed, the telescopic switching control valve 33 is in the right position due to the fact that an electromagnetic coil Y2 of the telescopic switching control valve is electrified, oil output by the hydraulic pump 32 enters a small cavity of the hydraulic oil cylinder through the master control electromagnetic valve 35, a right oil circuit of the telescopic switching control valve 33 and the two-way hydraulic lock 34, a piston rod of the hydraulic oil cylinder 23 retracts, the bolt 22 is pulled to be pulled out of a limiting hole of each telescopic arm, and each telescopic arm is unlocked. When the plug 22 is pulled out, when the sensing part 221 on the plug 22 enters a sensing area of the retraction position detection switch 25, the retraction position detection switch 25 is triggered to be closed, the electromagnetic coil Y3 of the master control electromagnetic valve 35 is electrified, the master control electromagnetic valve 35 is switched to the left position, and oil output by the hydraulic pump is led to a pilot control oil path through a right oil path of the master control electromagnetic valve 35, so that boarding operation can be performed, and boarding action is unlocked.
In the invention, the suspension arm is locked and unlocked by using the bolt device, and the operation is simple and convenient.
Claims (10)
1. A cargo boom comprises a plurality of sections of suspension arms, wherein each suspension arm comprises a basic arm and telescopic arms which are sequentially sleeved, and the crane boom is characterized in that each section of suspension arm is provided with a limiting hole, and the limiting holes on each section of suspension arm are coaxially aligned when all the telescopic arms are not in an extending state; and a bolt device is arranged on the basic arm, and comprises a bolt which can be plugged in and pulled out of the limiting hole and a driving device for pushing and pulling the bolt in and pulled out of the limiting hole.
2. The boom of claim 1, wherein the pin is in clearance fit with the hole.
3. The boom of claim 1 or 2, wherein the driving means comprises an actuator for driving the bolt to move and a control system for controlling the actuator, the bolt means comprises a cylindrical mounting seat having an end fixed to the base arm, and the bolt and actuator are mounted in the mounting seat.
4. The boom of claim 3, wherein the actuator is an electric motor and the control system is a control circuit for controlling the forward and reverse rotation of the electric motor.
5. The crane boom of claim 3, wherein the actuating member is a hydraulic cylinder and the control system is a hydraulic control circuit for controlling the extension and retraction of the hydraulic cylinder.
6. The boom of claim 5, wherein the hydraulic control circuit comprises a telescopic switching control valve, a two-way hydraulic lock connected between the telescopic switching control valve and the hydraulic cylinder, a hydraulic pump supplying oil to the telescopic switching control valve, and a hydraulic oil tank connected to the hydraulic pump.
7. The cargo boom according to claim 6, wherein the hydraulic control oil circuit further comprises a master control solenoid valve, an oil inlet end of the master control solenoid valve is connected to the hydraulic pump, a first oil outlet end of the master control solenoid valve is connected to an oil inlet end of the telescopic switching control valve, a second oil outlet end of the master control solenoid valve is connected to the pilot control oil circuit, the oil inlet end of the master control solenoid valve is simultaneously connected to the first oil outlet end and the second oil outlet end when the master control solenoid valve is in the left position, the oil inlet end of the master control solenoid valve is connected to the first oil outlet end when the master control solenoid valve is in the right position, and the second oil outlet.
8. The boom of any of claims 4 to 7, wherein the latching mechanism further comprises a latching position indicating mechanism comprising an extended position detection switch and a retracted position detection switch coupled to a latching position, each of the extended position detection switch and the retracted position detection switch being coupled to a position indicator light.
9. The boom of claim 7, characterized in that the latch means further comprises a latch position indicating means, the latch position indicating means comprises an extended position detecting switch and a retracted position detecting switch linked with the position of the latch, the extended position detecting switch and the retracted position detecting switch are respectively connected with a position indicating lamp, the latch is retracted to the retracted position detecting switch and is triggered, and the master control solenoid valve works in the left position; the bolt is retracted not in place, and the master control electromagnetic valve works in the free position when the retraction in place detection switch is not triggered.
10. A crane truck characterized by comprising a crane boom as claimed in any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110330494.XA CN112875528A (en) | 2021-03-25 | 2021-03-25 | Crane boom and automobile crane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110330494.XA CN112875528A (en) | 2021-03-25 | 2021-03-25 | Crane boom and automobile crane |
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| Publication Number | Publication Date |
|---|---|
| CN112875528A true CN112875528A (en) | 2021-06-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110330494.XA Pending CN112875528A (en) | 2021-03-25 | 2021-03-25 | Crane boom and automobile crane |
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| CN (1) | CN112875528A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113928986A (en) * | 2021-10-09 | 2022-01-14 | 中石化四机石油机械有限公司 | Hydraulic control cantilever lifting system |
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| CN209166477U (en) * | 2019-01-18 | 2019-07-26 | 北京拓盛智联技术有限公司 | The intelligent bolt of industrial equipment detection |
| CN214879732U (en) * | 2021-03-25 | 2021-11-26 | 安徽柳工起重机有限公司 | Crane boom and automobile crane |
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2021
- 2021-03-25 CN CN202110330494.XA patent/CN112875528A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000044173A (en) * | 1998-07-29 | 2000-02-15 | Tadano Ltd | Jib projecting and storing device of movable crane |
| CN203488445U (en) * | 2013-09-03 | 2014-03-19 | 徐州重型机械有限公司 | Hydraulic system with single cylinder bolt type telescopic boom and crane with hydraulic system |
| CN204848040U (en) * | 2015-08-26 | 2015-12-09 | 中石化石油工程技术服务有限公司 | On -vehicle mobile power station davit that stretches out and draws back |
| CN209166477U (en) * | 2019-01-18 | 2019-07-26 | 北京拓盛智联技术有限公司 | The intelligent bolt of industrial equipment detection |
| CN214879732U (en) * | 2021-03-25 | 2021-11-26 | 安徽柳工起重机有限公司 | Crane boom and automobile crane |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113928986A (en) * | 2021-10-09 | 2022-01-14 | 中石化四机石油机械有限公司 | Hydraulic control cantilever lifting system |
| CN113928986B (en) * | 2021-10-09 | 2024-08-09 | 中石化四机石油机械有限公司 | Hydraulic control cantilever lifting system |
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