CN218032365U - Automatic measuring system for verticality correction in installation of vertical prefabricated part - Google Patents
Automatic measuring system for verticality correction in installation of vertical prefabricated part Download PDFInfo
- Publication number
- CN218032365U CN218032365U CN202222347628.1U CN202222347628U CN218032365U CN 218032365 U CN218032365 U CN 218032365U CN 202222347628 U CN202222347628 U CN 202222347628U CN 218032365 U CN218032365 U CN 218032365U
- Authority
- CN
- China
- Prior art keywords
- clamping
- telescopic arm
- vertical prefabricated
- arm
- push rod
- 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
Landscapes
- Manipulator (AREA)
Abstract
The utility model discloses an automatic measuring system for verticality correction in installation of vertical prefabricated parts, which is installed on a telescopic arm of a moving frame and comprises a clamping mechanism and an angle detection mechanism, wherein the clamping mechanism comprises a first clamping component fixed at the rear part of the telescopic arm and a second clamping component fixed at the front part of the telescopic arm; a first clamping plate on the first clamping assembly and a second clamping plate on the second clamping assembly are enclosed to form a caliper to clamp the vertical prefabricated part; the angle detection mechanism comprises an inclination angle sensor which is attached to the second clamping plate. The utility model has the advantages that: the measuring device is installed on a clamping arm of the intelligent mechanical arm instead of manual measurement of verticality, the high-precision tilt sensor and the induction patch are combined together, the tilt angle of the patch is measured through the high-precision tilt sensor (due to the fact that the patch is tightly attached to the vertical prefabricated component, the tilt angle of the patch is the tilt angle of the vertical prefabricated component, data conversion is not needed), and rapid measurement can be achieved.
Description
Technical Field
The utility model relates to an assemble integral concrete structure building field, concretely relates to be used for vertical prefabricated component installation straightness automatic measurement system that hangs down.
Background
At present, in the installation process of a vertical prefabricated part of an assembly building, workers basically hold tools such as a plumb line, a running rule and a measuring tape to measure the verticality of the part.
The verticality of the vertical prefabricated part is measured manually, and the sequence of the main construction process is as follows: the method comprises the steps of hoisting a vertical prefabricated part from a stacking point to an installation operation surface → butt-joint installation of the vertical prefabricated part and a reserved steel bar → installation of a diagonal bracing member fixing member → placement of a line plumb on the top surface of the prefabricated part → manual measurement of the distance between the upper point and the lower point of the prefabricated part to the line plumb → adjustment of the perpendicularity of the prefabricated part according to measurement settlement → re-placement of the line plumb after adjustment is completed → re-measurement of the distance between the last 2 points of the prefabricated part and the line plumb → re-checking of the perpendicularity till the perpendicularity adjustment is completed.
According to the operation process, the labor intensity of workers is high, and a tool for measuring the verticality is easy to be interfered by environment and human factors to cause deviation, so that the installation quality of the vertical prefabricated part cannot meet the design requirement. At the wall body at elevartor shaft, stair entrance to a cave position at the measurement straightness in-process that hangs down, working space is narrow and small, and the operation is inconvenient, and faces the risk that the eminence falls, and work is dangerous big.
Disclosure of Invention
The utility model aims at providing a weak point according to above-mentioned prior art provides a hang down straightness correction automatic measurement system for vertical prefabricated component installation, and this hang down straightness correction automatic measurement system is through synthesizing inclination sensor and response paster and installing on fixture's second splint together, measures the inclination of response paster through inclination sensor to obtain vertical prefabricated component's inclination, need not to carry out data conversion again, realize the quick measurement.
The utility model discloses the purpose is realized accomplishing by following technical scheme:
an automatic verticality correction measuring system for mounting a vertical prefabricated part is mounted on a telescopic arm of a moving frame and is characterized by comprising a clamping mechanism and an angle detection mechanism, wherein the clamping mechanism comprises a first clamping assembly fixed at the rear part of the telescopic arm and a second clamping assembly fixed at the front part of the telescopic arm; a first clamping plate on the first clamping assembly and a second clamping plate on the second clamping assembly are enclosed to form a caliper to clamp the vertical prefabricated part; the angle detection mechanism comprises an inclination angle sensor which is attached to the second clamping plate.
First centre gripping subassembly is including being fixed in first centre gripping electric putter on the wall surface of flexible arm rear portion side and set up in first centre gripping electric putter front end first splint, the drive of first centre gripping electric putter first splint are flexible.
And a torque sensor is arranged on the first clamping electric push rod.
The second centre gripping subassembly includes second centre gripping electric putter, biax linking bridge and the second splint, the one end of second centre gripping electric putter articulate in on the anterior top surface of flexible arm, the other end with the upper end of biax linking bridge is articulated mutually, the lower extreme of biax linking bridge with the front end of flexible arm is articulated, just the upper portion of second splint is fixed in on the biax linking bridge.
And a torque sensor is arranged on the second clamping electric push rod.
And the clamping surfaces of the first clamping plate and the second clamping plate are respectively provided with a rubber layer.
The inclination angle sensor is attached to the clamping surface of the second clamping plate through an induction patch.
The telescopic boom comprises a main telescopic boom and an auxiliary telescopic boom, the main telescopic boom is connected with the auxiliary telescopic boom through an auxiliary boom swing mechanism, and the clamping mechanism is arranged on the auxiliary telescopic boom.
The utility model has the advantages that:
(1) The automatic equipment is adopted to replace manual work to measure the verticality, so that at least 2 labors can be liberated for hoisting teams and groups, and the labor construction cost is reduced;
(2) By adopting the inclination angle measuring mechanism, the error caused by the influence of wind force in the traditional plumb measuring method can be avoided, and the measuring precision and accuracy are further improved; the measuring device is arranged on a clamping arm of the intelligent mechanical arm, the high-precision tilt angle sensor and the induction patch are combined together, and the tilt angle of the patch is measured by the high-precision tilt angle sensor (because the patch is tightly attached to the vertical prefabricated part, the tilt angle of the patch is the tilt angle of the vertical prefabricated part, and data conversion is not needed), so that rapid measurement can be realized;
(3) The automatic verticality measuring system is installed on the intelligent mechanical arm, can be used for automatically measuring an instrument for a side face in a narrow space and a high altitude, does not need a worker to operate, and reduces the safety risk of worker construction.
Drawings
FIG. 1 is a schematic structural view of the automatic measuring system of the present invention installed on a robot arm system;
fig. 2 is a partial schematic view of a moving frame of the robot system of the present invention;
fig. 3 is a partial schematic view of the lift arm and the main telescopic arm of the middle robot arm system of the present invention;
fig. 4 is a partial schematic view of the auxiliary telescopic arm and the automatic measuring system of the robot arm system of the present invention;
fig. 5 is the utility model discloses well intelligent mechanical arm system centre gripping vertical prefabricated component's schematic diagram.
Detailed Description
The features of the present invention and other related features are described in further detail below by way of example in conjunction with the accompanying drawings to facilitate understanding by those skilled in the art:
referring to fig. 1-5, the symbols in the figures are: the device comprises a movable frame 1, a chassis 11, traveling wheels 12, an auxiliary supporting leg 13, an auxiliary supporting leg 131, a first electric push rod 132, a telescopic supporting leg 133, an upper-mounted rotating mechanism 2, a lifting arm 3, a fixed upright 31, a movable arm 32, a second electric push rod 33, a main telescopic arm 4, a first basic arm 41, a first telescopic arm 42, a third electric push rod 43, an auxiliary telescopic arm 5, a clamping mechanism 6, a first clamping electric push rod 61, a first clamping plate 62, a second clamping plate 63, a second clamping electric push rod 64, a double-shaft connecting bracket 65, a tilt angle sensor 66, an auxiliary arm rotating mechanism 7 and a vertical prefabricated component 8.
Example (b): as shown in fig. 1-5, this embodiment concretely relates to is used for vertical prefabricated component installation straightness automatic measurement system that rectifies that hangs down, install on the flexible arm structure of intelligent manipulator arm system, it mainly includes fixture 6 and angle detection mechanism, fixture 6 installs in the front portion of flexible arm structure, angle detection mechanism is through synthesizing inclination sensor 66 and response paster together and installing on fixture 6's second splint 63, fixture 6 laminates the centre gripping back to the top of vertical prefabricated component 8, the application is installed inclination sensor 66 on fixture 6 and is measured the straightness parameter that hangs down of vertical prefabricated component 8, through intelligent judgement, drive intelligent manipulator arm system adjustment vertical prefabricated component 8 and the contained angle on ground realize that the straightness that hangs down of vertical prefabricated component 8 reaches the design requirement.
As shown in fig. 1-5, the automatic measuring system is specifically installed on an intelligent robot system, the intelligent robot system in this embodiment includes a moving frame 1, an upper-loading swing mechanism 2, a lifting arm 3, a main telescopic arm 4, an auxiliary arm swing mechanism 7, an auxiliary telescopic arm 5, and a clamping mechanism 6, the upper-loading swing mechanism 2 is installed at an upper central position of the moving frame 1, the lifting arm 3 is vertically arranged, and a lower end of the lifting arm is fixedly connected with the upper-loading swing mechanism 2, the main telescopic arm 4 is horizontally arranged and fixed at an upper end of the lifting arm 3, a rear end of the auxiliary telescopic arm 5 is rotatably installed at a front end of the main telescopic arm 4 through the auxiliary arm swing mechanism 7, and the clamping mechanism 6 is installed at a front portion of the auxiliary telescopic arm 5.
As shown in fig. 1 and 2, the moving frame 1 includes a chassis 11, running wheels 12 and a four-wheel steering mechanism (not shown in the figure) installed between the chassis 11 and the running wheels 12, the four-wheel steering mechanism can be used for reducing the turning radius so that the smart arm can smoothly pass through the operation surface, the running wheels 12 are large-width flat tires and are used for increasing the contact area with the floor surface and reducing the contact stress; a power supply assembly (not shown) is further mounted on the chassis 11, and the power supply assembly may be a lithium iron battery or other dc/ac power supply, and is used for supplying power to each electric push rod, sensor and control system in the system. In the embodiment, the frame body of the chassis 11 is in an i shape, the four corners of the frame body are respectively hinged with an auxiliary supporting leg 13, and the auxiliary supporting legs 13 can be manually turned, folded and unfolded, namely, the frame body 1 is turned upwards to be stored in the moving process of the moving frame, and is turned downwards to be in the state shown in fig. 1 and 2 when moving in place and starting clamping operation, so that sufficient supporting force is provided and the working stability of the whole machine is ensured; auxiliary leg 13 is by upset support 131, first electric putter 132 and flexible landing leg 133 are constituteed, upset support 131 is the L type, constitute by horizontal pole and montant, horizontal pole one end is articulated mutually with the frame corner on chassis 11, horizontal pole level outwards extends and with decurrent montant fixed connection, through first electric putter 132 of fixed frame installation on the lower part lateral wall face of montant, coaxial arrangement has flexible landing leg 133 on the first electric putter 132 of vertical installation, stretch downwards in order to support whole moving vehicle frame 1 and construction work face through first electric putter 132 drive flexible landing leg 133, first electric putter 132 is by aforementioned power supply module supply electric power.
As shown in fig. 1, 2, and 3, the loading swing mechanism 2 is provided between the lift arm 3 and the traveling vehicle frame 1, and the loading swing mechanism 2 is composed of an integrated swing mechanism fixed to the upper surface of the chassis 11 and a motor for driving the integrated swing mechanism to swing and supplying electric power from the power supply unit. The whole intelligent mechanical arm system with the 2-bit upper slewing mechanism provides slewing power to rotate within a range of 360 degrees, so that the direction of the mechanical arm is adjusted, and a plurality of vertical prefabricated parts are adjusted.
As shown in fig. 1, 2, and 3, the lifting arm 3 includes a fixed upright 31, a movable arm 32, and a second electric push rod 33, wherein the fixed upright 31 is vertically disposed, a lower end of the fixed upright 31 is fixedly mounted on the upper swing mechanism 2, and an upper end of the fixed upright is coaxially movably sleeved into the movable arm 32, that is, the movable arm 32 can freely move in the fixed upright 31 in the vertical direction; the lower end of the second electric push rod 33 is fixed on the side wall surface of the fixed upright 31, and the upper end of the second electric push rod 33 is fixedly connected with the upper end of the movable arm 32, so that the movable arm 32 can be driven by the second electric push rod 33 to freely lift and lower in the vertical direction, and the second electric push rod 33 is supplied with electric power by the aforementioned power supply assembly. Specifically, the movable arm 32 of the lift arm 3 can be lifted up by a distance of 1000mm, and the second electric putter 33 is powered by a dc power source (power supply unit). When the trolley is retracted, the height of the whole trolley is reduced, the trolley is convenient to transport and transition, the trolley is lifted upwards in working, and the clamping mechanism 6 can conveniently span the top of the vertical prefabricated part 8.
As shown in fig. 1, 2, and 3, the main telescopic arm 4 includes a first basic arm 41, a first telescopic arm 42, and a third electric push rod 43, wherein the first basic arm 41 is disposed in a horizontal direction, and a rear end thereof is fixed to a top end of the lifting arm 3 (i.e., a top end of the movable arm 32), so that the main telescopic arm 4 can perform a lifting motion in a vertical direction along with the lifting arm 3, the first telescopic arm 42 is coaxially disposed at a front end of the first basic arm 41, the first telescopic arm 42 and the first basic arm 41 are coaxially sleeved with each other, a rear end of the third electric push rod 43 is fixed to the first basic arm 41, and a front end thereof is fixedly connected to a front end of the first telescopic arm 42, so that the first telescopic arm 42 can perform a front-back telescopic motion in a horizontal direction under driving of the third electric push rod 43. Specifically, the main telescopic arm 4 can extend forwards by a distance of 1000mm, a direct-current power supply (namely the power supply assembly supplies power) is adopted, the length of the whole vehicle is reduced when the vehicle is folded, and the auxiliary telescopic arm 5 is extended forwards during working so as to convey the auxiliary telescopic arm to different positions, so that the vertical prefabricated parts 8 at different positions can be adjusted conveniently.
As shown in fig. 1 and 4, the sub-boom turning mechanism 7 is disposed between the main telescopic boom 4 and the sub-telescopic boom 5, and specifically comprises an integrated turning mechanism and a motor, and the sub-boom turning mechanism 7 is mounted at the front end of the main telescopic boom 4 to provide power for turning of the sub-telescopic boom 5, so that the sub-telescopic boom 5 can turn within a certain range, and position matching with the vertical prefabricated component 8 is achieved.
As shown in fig. 1 and 4, the main body of the sub telescopic boom 5 is a basic boom, which is disposed in a horizontal state, and the rear end thereof is fixed to a sub boom turning mechanism 7, and the front end thereof is provided with a clamp mechanism 6. Of course, the auxiliary telescopic arm 5 may also adopt a telescopic mechanical arm structure to complement the shortage of the main telescopic arm 4 according to the actual working condition.
As shown in fig. 1 and 4, the clamping mechanism 6 includes a first clamping assembly fixed at the rear of the auxiliary telescopic arm 5 and a second clamping assembly fixed at the front of the auxiliary telescopic arm 5; wherein:
the first clamping assembly comprises a first clamping electric push rod 61 fixed on the side wall surface at the rear part of the auxiliary telescopic arm 5 and a first clamping plate 62 arranged at the front end of the first clamping electric push rod 61;
the second clamping assembly comprises a second clamping electric push rod 64, a double-shaft connecting support 65 and a second clamping plate 63, one end of the second clamping electric push rod 64 is hinged to the top surface of the front part of the auxiliary telescopic arm 5, the other end of the second clamping electric push rod is hinged to the upper end of the double-shaft connecting support 65, the lower end of the double-shaft connecting support 65 is hinged to the front end of the auxiliary telescopic arm 5, and the upper part of the second clamping plate 63 is fixed on the double-shaft connecting support 65; as shown in fig. 4, under the pushing action of the second clamping electric push rod 64, the double-shaft connecting bracket 65 and the second clamping plate 63 thereon rotate, so that the clamping angle and force can be changed.
Further, rubber layers are fixed to the clamping surfaces of the first clamping plate 62 and the second clamping plate 63, respectively, the rubber layers are arranged to enhance clamping adhesion, and torque sensors are built in the first clamping electric push rod 61 and the second clamping electric push rod 64, respectively.
The angle detection mechanism in this embodiment mainly includes a tilt sensor 66 and an inductive patch, which are combined into an integral structure and attached to the clamping surface of the second clamping plate 63, the tilt sensor 66 includes an MCU, an MEMS accelerometer, an analog-to-digital conversion circuit, and a communication unit, and each component is integrated on a very small circuit board. In the clamping process, the second clamping plate 63 of the clamping mechanism 6 is attached to the surface of the vertical prefabricated part 8, and the inclination angle sensor 66 is attached to the second clamping plate 63 through the sensing patch, which is equivalent to the fact that the inclination angles of the sensing patch and the vertical prefabricated part 8 are consistent, so that the inclination angle of the sensing patch is the inclination angle of the vertical prefabricated part 8, and data conversion is not needed.
In the embodiment, the first clamping plate 62 and the second clamping plate 63 are combined together to form a structure form of a caliper, after the position of each arm structure of the manual operation mechanical arm system is adjusted, the clamping mechanism 6 is used for automatically clamping the top of the vertical prefabricated part 8, and whether the clamping of the vertical prefabricated part 8 is finished is judged based on the arrangement of the torque sensors on the first clamping electric push rod 61 and the second clamping electric push rod 64; after clamping is completed, the inclination angle sensor installed on the second clamping plate 63 measures the angle information of the vertical prefabricated part 8 in real time and feeds the angle information back to the control system, and the control system controls the extension and retraction of the second clamping electric push rod 64 on the auxiliary telescopic arm 5 according to the feedback information so as to adjust the angle of the vertical prefabricated part 8.
As shown in fig. 1 to 5, the measuring steps of the automatic measuring system for the installation verticality correction of the vertical prefabricated part in the embodiment are as follows:
step 1: after the vertical prefabricated part 8 is lifted to a mounting point by a tower crane and connection of reserved steel bars is completed, the intelligent mechanical arm enables the clamping structure 6 to clamp the upper end of the vertical prefabricated part 8 through combined actions of the lifting arm 3, the main telescopic arm 4 and the auxiliary telescopic arm 5;
step 2: operating the main telescopic arm 4, the auxiliary telescopic arm 5 and the clamping structure 6 of the intelligent arm to enable the high-precision tilt angle sensor 66 and the rubber layer on the clamping structure 6 to be tightly attached to the vertical prefabricated component 8;
and step 3: after the vertical prefabricated part 8 is clamped and tightly attached, the high-precision tilt angle sensor 66 starts to measure the included angle between the induction patch and the ground;
and 4, step 4: because the sensing patch is completely attached to the vertical prefabricated component 8, the measured inclination angle of the sensing patch is the inclination angle of the vertical prefabricated component 8 and the ground;
and 5: sending the measured inclination angle data to a control system, and converting the measured inclination angle data into a horizontal distance required to be stretched by the auxiliary telescopic arm 5;
and 6: the number of repetitions of steps 1 to 5 is set to ensure the accuracy and reliability of the measurement.
Claims (8)
1. An automatic verticality correction measuring system for mounting a vertical prefabricated part is mounted on a telescopic arm of a moving frame and is characterized by comprising a clamping mechanism and an angle detection mechanism, wherein the clamping mechanism comprises a first clamping assembly fixed at the rear part of the telescopic arm and a second clamping assembly fixed at the front part of the telescopic arm; a first clamping plate on the first clamping assembly and a second clamping plate on the second clamping assembly are enclosed to form a caliper to clamp the vertical prefabricated part; the angle detection mechanism comprises an inclination angle sensor which is attached to the second clamping plate.
2. The automatic measuring system for the installation perpendicularity correction of the vertical prefabricated parts according to claim 1, characterized in that the first clamping assembly comprises a first clamping electric push rod fixed on a side wall surface at the rear part of the telescopic arm and the first clamping plate arranged at the front end of the first clamping electric push rod, and the first clamping electric push rod drives the first clamping plate to stretch and retract.
3. The automatic measuring system for the installation perpendicularity correction of the vertical prefabricated parts according to claim 2, characterized in that a torque sensor is arranged on the first clamping electric push rod.
4. The system according to claim 1, wherein the second clamping assembly comprises a second clamping electric push rod, a double-shaft connecting support and a second clamping plate, one end of the second clamping electric push rod is hinged to the top surface of the front portion of the telescopic arm, the other end of the second clamping electric push rod is hinged to the upper end of the double-shaft connecting support, the lower end of the double-shaft connecting support is hinged to the front end of the telescopic arm, and the upper portion of the second clamping plate is fixed to the double-shaft connecting support.
5. The automatic measuring system for the installation perpendicularity correction of the vertical prefabricated parts according to claim 4, characterized in that a torque sensor is arranged on the second clamping electric push rod.
6. The system according to claim 1, wherein a rubber layer is respectively arranged on the clamping surfaces of the first clamping plate and the second clamping plate.
7. The system according to claim 1, wherein the tilt sensor is attached to the clamping surface of the second clamping plate via an inductive patch.
8. The automatic measuring system for the installation perpendicularity correction of the vertical prefabricated parts according to claim 1, wherein the telescopic arms comprise a main telescopic arm and an auxiliary telescopic arm, the main telescopic arm and the auxiliary telescopic arm are connected through an auxiliary arm rotating mechanism, and the clamping mechanism is arranged on the auxiliary telescopic arm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222347628.1U CN218032365U (en) | 2022-09-05 | 2022-09-05 | Automatic measuring system for verticality correction in installation of vertical prefabricated part |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222347628.1U CN218032365U (en) | 2022-09-05 | 2022-09-05 | Automatic measuring system for verticality correction in installation of vertical prefabricated part |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218032365U true CN218032365U (en) | 2022-12-13 |
Family
ID=84352402
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222347628.1U Active CN218032365U (en) | 2022-09-05 | 2022-09-05 | Automatic measuring system for verticality correction in installation of vertical prefabricated part |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218032365U (en) |
-
2022
- 2022-09-05 CN CN202222347628.1U patent/CN218032365U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109843779B (en) | Work vehicle with basket device | |
| AU2018298649B2 (en) | Work gondola apparatus and work vehicle provided with same | |
| CN113550868A (en) | Auxiliary wind power generation blade rapid loading device | |
| CN112531318A (en) | Large phased array antenna assembling, transferring and near field testing tool system | |
| CN218032365U (en) | Automatic measuring system for verticality correction in installation of vertical prefabricated part | |
| CN111236660A (en) | Auxiliary equipment for steel assembly and use method thereof | |
| CN107086474B (en) | Meter box installation power assisting device | |
| JP4138864B1 (en) | Crane type gondola structure | |
| CN111236659B (en) | Composition of auxiliary equipment for steel assembly | |
| CN217353725U (en) | Automatic jacking for building construction | |
| CN218018496U (en) | Intelligent mechanical arm system for installing and adjusting verticality of vertical prefabricated part | |
| ITTO20100134U1 (en) | ELEVATION PLATFORM FOR THE REVISION OF GAS MILLS | |
| CN113562659B (en) | Fiber concrete slab hangs and draws auxiliary installation equipment | |
| CN115464642A (en) | Method for adjusting perpendicularity of prefabricated part by using intelligent mechanical arm | |
| CN209760838U (en) | But assembled component high efficiency of quality control and electromagnetism jack-up fine tuning is equipment of assembling in advance | |
| CN113083568A (en) | Overhead spraying robot carried on crane and spraying method | |
| CN110821190A (en) | Installing and verticality adjusting machine for steel pipe column and installing and verticality adjusting method for steel pipe column | |
| CN116002504B (en) | Equipment installation lifting machine on electric wire supporting circuit column | |
| CN219426796U (en) | Intelligent mechanical arm system for assisting in adjusting verticality of vertical prefabricated part | |
| CN214656459U (en) | Operating platform | |
| CN216130525U (en) | Intelligent plastering robot | |
| CN117345329A (en) | Multifunctional construction and power supply integrated equipment and method | |
| CN214599997U (en) | Overhead spraying equipment carried on crane | |
| CN217995965U (en) | Auxiliary device for installing charging rail | |
| CN218813915U (en) | Foundation depth detector |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |