CN210594988U - Self-walking type miniature crawler crane - Google Patents
Self-walking type miniature crawler crane Download PDFInfo
- Publication number
- CN210594988U CN210594988U CN201921079182.0U CN201921079182U CN210594988U CN 210594988 U CN210594988 U CN 210594988U CN 201921079182 U CN201921079182 U CN 201921079182U CN 210594988 U CN210594988 U CN 210594988U
- Authority
- CN
- China
- Prior art keywords
- self
- suspension arm
- hydraulic
- boom
- crawler
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Abstract
The utility model discloses a from miniature crawler crane of walking, include: the device comprises a suspension arm mechanism, a supporting leg mechanism, a rotary mechanism, a vehicle body frame, a travelling mechanism, a shield assembly, an operating system and a power system; the travelling mechanism is positioned at the lower side of the vehicle body frame, the vehicle body frame is provided with a supporting leg mechanism, a revolving mechanism and a shield assembly, and the suspension arm mechanism is arranged on the revolving mechanism; the power system is positioned inside the shield assembly; the operating system respectively controls the suspension arm mechanism, the supporting leg mechanism, the rotary mechanism and the travelling mechanism through each hydraulic element, and the power system provides power for the operating system. The self-walking type micro crawler crane can replace a traditional crane and perform hoisting operation in a narrow space.
Description
Technical Field
The utility model relates to an engineering machine tool technical field especially relates to a from little crawler crane of walking.
Background
With the continuous development of science and technology, mobile cranes such as automobile cranes and lorry-mounted cranes have been widely used in various construction industries. However, these products cannot meet the hoisting requirements of narrow spaces in the industries of construction, chemical engineering, electric power and the like.
How to design an engineering machine capable of meeting the hoisting requirement of narrow space in the industries of construction, chemical engineering, electric power and the like is a technical problem which needs to be solved urgently by technical personnel in the field.
Disclosure of Invention
In order to solve the technical problem, the utility model provides a from little crawler crane of walking can carry out the jack-up operation in narrow space.
The application provides a from miniature crawler crane of walking includes: the device comprises a suspension arm mechanism, a supporting leg mechanism, a rotary mechanism, a vehicle body frame, a travelling mechanism, a shield assembly, an operating system and a power system;
the travelling mechanism is positioned at the lower side of the vehicle body frame, the support leg mechanism, the revolving mechanism and the shield assembly are arranged on the vehicle body frame, and the suspension arm mechanism is arranged on the revolving mechanism; the power system is positioned inside the shield assembly;
the operating system respectively controls the suspension arm mechanism, the supporting leg mechanism, the rotary mechanism and the travelling mechanism through each hydraulic element, and the power system provides power for the operating system.
Optionally, the boom mechanism comprises a multi-section nested hexagonal box-shaped boom, a sliding block and a side sliding block supporting inner section boom are arranged in each outer boom section, a telescopic oil cylinder is arranged in each boom, and a variable amplitude hydraulic cylinder is arranged in the middle of the first section of the boom; the operating system controls the stretching of each telescopic oil cylinder so as to control the stretching of the suspension arm mechanism, and controls the stretching of the variable amplitude hydraulic cylinder so as to change the inclination angle of the suspension arm mechanism.
Optionally, the supporting leg mechanism comprises four groups of supporting legs, the four groups of supporting legs are distributed at four corners of the vehicle body frame, each group of supporting legs comprises a main leg, an inner supporting leg and a supporting leg which are sequentially connected, and the four groups of supporting legs can be unfolded to support the crane body and can also be folded and stored on the vehicle body frame.
Optionally, the swiveling mechanism includes a frame, a speed reducer, and a motor, the boom mechanism is mounted on the frame, and the motor drives the frame to perform a swiveling motion through the speed reducer, so as to realize the swiveling of the boom mechanism.
Optionally, the running mechanism comprises a transmission device, a steering device and a crawler running device, the transmission device controls the crawler running device to run back and forth, and the steering device controls the crawler running device to turn left and right.
Optionally, the operating system includes a manual operating device, a remote control operating device, and a hydraulic control system, the hydraulic control system includes a control valve and a hydraulic actuator, the manual operating device and the remote control operating device can control each of the hydraulic actuators through the control valve, and the hydraulic actuator includes a support cylinder of the leg mechanism, a luffing cylinder and a telescopic cylinder of the boom mechanism, a rotary motor of the swivel mechanism, and a traveling motor of the crawler self-traveling system.
Optionally, the system further comprises an electric control system, wherein the electric control system comprises an information acquisition system and an information feedback system, and the information acquisition system comprises a tilt angle sensor, an oil pressure sensor, a temperature sensor, a fuel oil level sensor, a landing leg mechanism position sensor, a boom mechanism homing sensor and a boom length angle sensor; and the information feedback system transmits the detection data of each sensor to the operating system.
Optionally, the power system comprises an oil power system and an electric power system, both systems being capable of powering the operating system separately.
Compared with the prior art, the technical scheme of the utility model have following advantage:
the self-walking type micro crawler crane can replace a traditional crane and perform hoisting operation in a narrow space. The operating system distributes hydraulic energy to the travelling mechanism, the supporting leg mechanism and the suspension arm mechanism through hydraulic elements, and a manual operating system or a remote control operating system controls the crawler to travel and steer; the support leg oil cylinder is controlled to extend and retract, the support leg is supported during supporting, the crawler is enabled to leave the ground, meanwhile, the equipment support is enabled to be horizontal, and the support range of the support leg is enlarged; the suspension arm is controlled to stretch, fluctuate and rotate, and the suspension arm is controlled to hoist or lower heavy objects, and the micro-motion performance of the equipment is accurately realized through the proportional remote controller and the proportional valve.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention.
Fig. 1 is a schematic structural view of a specific embodiment of a self-propelled micro crawler crane provided by the present invention;
FIG. 2 is a schematic view of the deployed configuration of the self-propelled micro crawler crane shown in FIG. 1;
fig. 3 is a schematic diagram illustrating the operation of the self-propelled micro crawler crane shown in fig. 1.
Wherein the correspondence between the description of the drawings and the names of the components in fig. 1 to 3 is as follows:
a boom mechanism 1; a leg mechanism 2;
a swiveling mechanism 3; a vehicle body frame 4;
a traveling mechanism 5; an operating system 6;
a power system 7; a hydraulic control system 8;
a shroud assembly 9; an electronic control system 10.
Detailed Description
The following detailed description of the embodiments of the present invention will be made with reference to the accompanying drawings. It is to be understood that the description of the embodiments herein is for purposes of illustration and explanation only and is not intended to limit the invention.
Referring to fig. 1 to 3, fig. 1 is a schematic structural diagram of a self-walking micro crawler crane according to an embodiment of the present invention; FIG. 2 is a schematic view of the deployed configuration of the self-propelled micro crawler crane shown in FIG. 1; fig. 3 is a schematic diagram illustrating the operation of the self-propelled micro crawler crane shown in fig. 1.
In a specific embodiment, the utility model provides a from miniature crawler crane of walking, include: the device comprises a suspension arm mechanism 1, a supporting leg mechanism 2, a revolving mechanism 3, a vehicle body frame 4, a traveling mechanism 5, a shield assembly 9, an operating system 6 and a power system 7;
the travelling mechanism 5 is positioned at the lower side of the vehicle body frame 4, the support leg mechanism 2, the revolving mechanism 3 and the shield assembly 9 are arranged on the vehicle body frame 4, and the suspension arm mechanism 1 is arranged on the revolving mechanism 3; the power system 7 is positioned inside the shield assembly 9;
the operating system 6 controls the boom mechanism 1, the support leg mechanism 2, the swivel mechanism 3 and the traveling mechanism 5 through each hydraulic component, and the power system 7 provides power for the operating system 6.
The self-walking type micro crawler crane moves through the walking mechanism 5 to change the position, and after reaching the operation position, the self-walking type micro crawler crane is supported by the supporting leg mechanism 2 and then operates the suspension arm mechanism 1 to perform the lifting operation. The self-walking type micro crawler crane can replace a traditional crane and perform hoisting operation in a narrow space.
The operating system distributes hydraulic energy to the travelling mechanism 5, the supporting leg mechanism 2 and the suspension arm mechanism 1 through hydraulic elements, and a manual operating system or a remote control operating system controls the crawler to travel and steer; the extension and retraction of the support leg oil cylinder are controlled, the crawler is separated from the ground during supporting, the equipment is supported horizontally, and the supporting range is enlarged; the suspension arm is controlled to stretch, fluctuate and rotate, and the suspension arm is controlled to hoist or lower heavy objects, and the micro-motion performance of the equipment is accurately realized through the proportional remote controller and the proportional valve.
Specifically, the suspension arm mechanism 1 comprises a plurality of sections of nested hexagonal box-shaped suspension arms, a sliding block and a side sliding block supporting inner section arm are arranged in each outer arm section, a telescopic oil cylinder is arranged in each suspension arm, and a variable amplitude hydraulic cylinder is arranged in the middle of the first section of the suspension arm; the operating system 6 controls the stretching of each telescopic oil cylinder so as to control the stretching of the boom mechanism 1, and controls the stretching of the variable amplitude hydraulic cylinder so as to change the inclination angle of the boom mechanism 1.
The supporting leg mechanism 2 comprises four groups of supporting legs, the four groups of supporting legs are distributed at four corners of the vehicle body frame 4, each group of supporting legs comprises a main leg, an inner supporting leg and a supporting leg which are sequentially connected, and the four groups of supporting legs can be unfolded to support a crane body and can also be folded and stored on the vehicle body frame 4.
The revolving mechanism 3 comprises a rack, a speed reducer and a motor, the suspension arm mechanism 1 is installed on the rack, and the motor drives the rack to do revolving motion through the speed reducer so as to realize the revolving of the suspension arm mechanism 1.
The traveling mechanism 5 comprises a transmission device, a steering device and a crawler traveling device, the transmission device controls the crawler traveling device to travel forwards and backwards, and the steering device controls the crawler traveling device to turn left and right.
In each of the above specific embodiments, the operating system 6 includes a manual operating device, a remote control operating device, and a hydraulic control system 8, the hydraulic control system 8 includes a control valve and a hydraulic actuator, both the manual operating device and the remote control operating device can control each of the hydraulic actuators through the control valve, and the hydraulic actuator includes a support cylinder of the leg mechanism 2, a luffing cylinder and a telescopic cylinder of the boom mechanism 1, a rotation motor of the slewing mechanism 3, and a travel motor of the crawler self-travel system. The control valve is a full-proportion hydraulic control valve and distributes hydraulic energy to the travelling mechanism 5, the supporting leg mechanism 2 and the suspension arm mechanism 1.
The self-walking type micro crawler crane further comprises an electric control system 10, wherein the electric control system 10 comprises an information acquisition system and an information feedback system, and the information acquisition system comprises a tilt angle sensor, an oil pressure sensor, a temperature sensor, a fuel oil level sensor, a supporting leg mechanism position sensor and a suspension arm mechanism position sensor; and the information feedback system transmits the detection data of each sensor to the operating system. The temperature sensor comprises an engine cooling water temperature sensor and a hydraulic oil temperature sensor.
Specifically, the power system 7 includes an oil power system and an electric power system, and the two systems can respectively provide power for the operating system 6.
The engine or the motor respectively drives a set of hydraulic system, the hydraulic control valve distributes hydraulic energy to the travelling mechanism 5, the supporting leg mechanism 2 and the suspension arm mechanism 1, and a manual operation system or a remote control operation system controls the crawler belt to travel and turn; the support legs are controlled to be supported off the ground, so that the crawler is not stressed and the support range is enlarged; the suspension arm is controlled to stretch, fluctuate and rotate, and the suspension arm is controlled to hoist or lower heavy objects, and the micro-motion performance of the equipment is accurately realized through the proportional remote controller and the proportional valve.
The electric control system 10 can control and feed back comprehensive information, and actively prevent and solve the safety problem of equipment caused by misoperation and self fault self-checking and quick positioning of the equipment through collecting and analyzing information of a support leg mechanism part sensor, an arm mechanism homing limit switch, a suspension arm length angle sensor, an inclination angle sensor, crane moment limiter information, lifting hook overwinding and steel wire rope three-circle alarm information and engine and motor system information, so that the safety performance of the equipment is improved, the later maintenance and maintenance efficiency is improved, and the use cost of the equipment is reduced.
The utility model provides a from miniature crawler crane of walking a specific embodiment as follows:
from walking miniature crawler crane includes: the crane comprises a suspension arm mechanism 1, a supporting leg mechanism 2, a revolving mechanism 3, a vehicle body frame 4, a traveling mechanism 5, an operating system 6, a power system 7, a hydraulic control system 8, a shield assembly 9 and an electric control system 10.
The suspension arm mechanism 1 is composed of a multi-section suspension arm box body, a telescopic hydraulic cylinder, a telescopic rope system and the like. The suspension arm is formed by nesting hexagonal box-shaped suspension arms, each outer arm section is provided with a sliding block for supporting the inner section arm and a side sliding block for supporting the inner telescopic suspension arm, and a telescopic oil cylinder is arranged inside the suspension arm to form an arm support hydraulic system.
As shown in fig. 1 and 2, the five-section hexagonal box-shaped boom nesting structure is adopted, the length of the boom can be changed by stretching and retracting an internal oil cylinder, and the telescopic oil cylinder is used for performing stretching and retracting of the boom and changing the length of the boom; the lower end of the swing arm is arranged on a rotary mechanism 3, the middle part of the first section of the suspension arm is supported by a variable amplitude hydraulic cylinder, and the inclination angle of the suspension arm is changed by the expansion and contraction of the variable amplitude hydraulic cylinder.
The supporting leg mechanism 2 is arranged on a vehicle body frame 4 and is of a foldable supporting structure. The supporting leg mechanism 2 is composed of a supporting leg rotary joint, a rotary fixing pin shaft, a supporting leg main leg, an outer supporting leg oil cylinder, a supporting leg inner supporting leg, an inner supporting leg oil cylinder and supporting legs. The number of the supporting legs is 4, and the supporting legs are distributed on two sides of the vehicle body frame 4 in pairs; the supporting legs are manually unfolded to form X-shaped distribution, and the supporting legs of the crane are supported by extending the supporting leg oil cylinders. The supporting leg mechanism is used for supporting the equipment, and the equipment can be used for performing interim operation after being supported.
The rotary mechanism 3 is composed of a rotary frame, a rotary speed reducer, a rotary motor and a central rotary joint. The telescopic arm, the upper part and the lower part of the winding mechanism, the lifting of the amplitude changing mechanism and the lower part are provided through the central rotary joint; the rotary speed reducer is driven to move by the operation of the rotary motor. The 360-degree rotary motion of the suspension arm can be realized.
The rotary mechanism 3 is arranged on a crane frame, a winch is arranged in the rotary mechanism 3, the telescopic boom and the amplitude variation hydraulic cylinder are both hinged on the rotary mechanism 3, and the other end of the amplitude variation hydraulic cylinder is hinged with the telescopic boom. The winding mechanism consists of a hydraulic winch, a lifting hook, a pulley, a steel wire rope, a rope pressing device and the like; the hydraulic winch is used for winding and lowering the steel wire rope of the lifting hook to realize the up-and-down motion of the lifting hook and the like. The amplitude variation mechanism consists of an amplitude variation hydraulic cylinder, is connected with the suspension arm and the rotary device, and changes the elevation angle of the suspension arm by the extension and retraction of the amplitude variation hydraulic cylinder so as to change the operation amplitude of the suspension arm.
The body frame 4 connects the main members of the leg, the swing, and the power section to the main members of the crane, such as the traveling section.
The traveling mechanism 5 comprises a lower vehicle traveling support, a rubber track, a planetary reducer, a driving wheel, a guide wheel, a bearing wheel, a supporting chain wheel, a tensioning support, a tensioning mechanism and the like. The traveling mechanism 5 enables the crane to travel forwards and backwards and turn left and right; the crawler traveling device comprises a crawler frame, a driving wheel, a guide wheel, a thrust wheel, a carrier wheel, a crawler wheel and the like. The planetary reducer drives the driving wheel to rotate, the crawler belt is driven to enable the crane to walk, and the planetary reducer drives the driving wheel to rotate in a differential mode to enable the crane to turn.
The operating system 6 includes both manual and remote control operating systems.
The hydraulic system comprises a hydraulic oil tank, a multi-way reversing valve, a switching valve, an oil pump, a motor, a hydraulic oil cylinder, a hydraulic winch and the like. The hydraulic control system comprises a multi-way reversing valve, a battery switching valve, a safety valve and the like.
The hydraulic actuating element comprises a supporting leg supporting oil cylinder, a variable amplitude oil cylinder, a telescopic oil cylinder, a rotary motor, a walking motor, a hydraulic winch and the like.
The power system 7 comprises two powers of an engine and a motor. The engine and the motor respectively convert mechanical energy into hydraulic energy through different hydraulic pumps to provide power required by walking, supporting and hoisting of the whole vehicle.
The hydraulic control system is a full-proportion hydraulic control system and comprises a hydraulic oil tank, a multi-way reversing valve, a switching valve, an oil pump, a motor, a hydraulic oil cylinder, a hydraulic winch and the like; the hydraulic control system comprises a multi-way reversing valve, a battery switching valve, a safety valve and the like; the hydraulic actuating element comprises a supporting leg supporting oil cylinder, a variable amplitude oil cylinder, a telescopic oil cylinder, a rotary motor, a walking motor, a hydraulic winch and the like.
The shield assembly 9 covers the power system 7, the hydraulic system and the electrical system and protects the internal parts. The equipment looks more concise and beautiful.
The electronic control system 10 is a comprehensive information control and feedback electronic control system.
The safety control system comprises a torque limiter, an inclination angle sensor, an oil pressure sensor, a temperature sensor, a fuel oil level sensor, a steel wire rope over-discharge protection mechanism, a suspension arm homing position detection and the like.
It is right above that the utility model provides a from little caterpillar crane of walking has carried out detailed introduction. The principles and embodiments of the present invention have been explained herein using specific examples, and the above descriptions of the embodiments are only used to help understand the method and its core ideas of the present invention. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, the present invention can be further modified and modified, and such modifications and modifications also fall within the protection scope of the appended claims.
Claims (8)
1. A self-propelled crawler micro-crane, comprising: the device comprises a suspension arm mechanism, a supporting leg mechanism, a rotary mechanism, a vehicle body frame, a travelling mechanism, a shield assembly, an operating system and a power system;
the travelling mechanism is positioned at the lower side of the vehicle body frame, the support leg mechanism, the revolving mechanism and the shield assembly are arranged on the vehicle body frame, and the suspension arm mechanism is arranged on the revolving mechanism; the power system is positioned inside the shield assembly;
the operating system respectively controls the suspension arm mechanism, the supporting leg mechanism, the rotary mechanism and the travelling mechanism through each hydraulic element, and the power system provides power for the operating system.
2. The self-propelled micro crawler crane of claim 1, wherein the boom mechanism comprises a plurality of nested hexagonal box-shaped booms, each outer boom section having a slider and a side slider supporting an inner boom, each boom having a telescoping cylinder therein, the middle of the first section of the boom having a luffing cylinder therein; the operating system controls the stretching of each telescopic oil cylinder so as to control the stretching of the suspension arm mechanism, and controls the stretching of the variable amplitude hydraulic cylinder so as to change the inclination angle of the suspension arm mechanism.
3. The self-propelled micro crawler crane according to claim 1, wherein the leg mechanism comprises four sets of legs, the four sets of legs are distributed at four corners of the body frame, each set of legs comprises a main leg, an inner leg and a support leg which are connected in sequence, and the four sets of legs can be unfolded to support the crane body and also can be folded and stored on the body frame.
4. The self-propelled micro crawler crane according to claim 1, wherein said slewing mechanism comprises a frame, a speed reducer, and a motor, said boom mechanism being mounted on said frame, said motor driving said frame to perform slewing motion via said speed reducer so as to effect slewing of said boom mechanism.
5. The self-propelled micro crawler crane according to claim 1, wherein said traveling mechanism comprises a transmission, a steering device, and a crawler traveling device, said transmission controlling the front and rear traveling of said crawler traveling device, and said steering device controlling the left and right turning of said crawler traveling device.
6. The self-propelled micro crawler crane according to any of the claims 1 to 5, wherein the operating system comprises a manual operating device, a remote operating device and a hydraulic control system; the hydraulic control system comprises a control valve and hydraulic execution elements, the manual operation device and the remote control operation device can control each hydraulic execution element through the control valve, and the hydraulic execution elements comprise a supporting oil cylinder of the supporting leg mechanism, a variable amplitude hydraulic cylinder and a telescopic oil cylinder of the suspension arm mechanism, a rotary motor of the rotary mechanism and a walking motor of the crawler self-walking system.
7. The self-propelled micro crawler crane according to claim 6, further comprising an electronic control system, wherein the electronic control system comprises an information acquisition system and an information feedback system, the information acquisition system comprises a tilt sensor, an oil pressure sensor, a temperature sensor, a fuel level sensor, a leg mechanism position sensor, a boom mechanism homing limit switch and a boom length angle sensor; and the information feedback system transmits the detection data of each sensor to the operating system.
8. The self-propelled crawler travel crane of claim 7, wherein said power system comprises an oil power system and an electric power system, both systems being capable of separately powering said operating system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921079182.0U CN210594988U (en) | 2019-07-11 | 2019-07-11 | Self-walking type miniature crawler crane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921079182.0U CN210594988U (en) | 2019-07-11 | 2019-07-11 | Self-walking type miniature crawler crane |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210594988U true CN210594988U (en) | 2020-05-22 |
Family
ID=70721340
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921079182.0U Active CN210594988U (en) | 2019-07-11 | 2019-07-11 | Self-walking type miniature crawler crane |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210594988U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| IT202100006392A1 (en) * | 2021-03-17 | 2022-09-17 | Almac S R L | STABILIZED MACHINE |
-
2019
- 2019-07-11 CN CN201921079182.0U patent/CN210594988U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| IT202100006392A1 (en) * | 2021-03-17 | 2022-09-17 | Almac S R L | STABILIZED MACHINE |
| EP4059877A1 (en) * | 2021-03-17 | 2022-09-21 | Almac S.r.l. | Stabilised machine |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP3676211A1 (en) | Articulated boom telehandler | |
| CN202369282U (en) | Movable crane | |
| EP0048076A1 (en) | Mobile crane structure | |
| CN202936116U (en) | Folding type truck crane | |
| CN210594988U (en) | Self-walking type miniature crawler crane | |
| US3259251A (en) | Extensible boom with tandem operating cylinders | |
| CN201647840U (en) | Crane cab position changing mechanism and crane | |
| CN207713311U (en) | A kind of narrow space telescopic crane boom | |
| CN210559003U (en) | Miniature self-walking crawler crane | |
| CN202465132U (en) | Seven-section arm body expanding and retracting system | |
| CN101117202A (en) | Novel hydraulic crawler crane | |
| CN217808437U (en) | Mast crane with movable double arms | |
| CN103253602A (en) | Liftable self-propelled tracked vehicle superlift device and crane | |
| CN115259037A (en) | Self-walking track mast vertical lifting platform | |
| CN105460810A (en) | Telescopic arm internally provided with three hydraulic cylinders and used for lorry-mounted crane | |
| CN207811121U (en) | A kind of wheel type hydraulic crane | |
| CN204138220U (en) | A kind of construction machinery and equipment and rail-variable base apparatus thereof | |
| CN109537433B (en) | All-directional automatic pushing platform for pontoon bridge | |
| CN202379695U (en) | Fixed arm disassembling device | |
| CN202377757U (en) | Movable-type arm removing device | |
| CN218025133U (en) | Telescopic tower crane arm | |
| CN217734884U (en) | Crawler walking type concrete spreader | |
| CN102489983B (en) | Movable arm dismantling device | |
| CN216277897U (en) | Mechanical arm and assembly trolley for grabbing large-tonnage prefabricated structural blocks on ground | |
| CN214653419U (en) | Crank arm type double-platform folding telescopic insulating arm capable of moving at multiple angles |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |