Building wall building auxiliary device

By lifting the cart and lifting frame structure, combined with stepper motor and electric push rod, convenient positioning and adjustment of building wall building devices and brick conveying are achieved, solving the adaptability problems of existing devices on walls of different heights, and improving construction quality and efficiency.

CN223305453UActive Publication Date: 2025-09-05SHENZHEN JIANAN EASTERN CONSTR CO LTD
View PDF 1 Cites 0 Cited by

Patent Information

Application Number
CN202422299360.8
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-09-20
Publication Date
2025-09-05
Estimated Expiration
2034-09-20

AI Technical Summary

Technical Problem

The existing building wall-building auxiliary devices are not convenient for convenient lifting positioning and brick conveying, and are difficult to adapt to walls of different heights, affecting construction quality and efficiency.

Method used

The lifting cart and lifting frame structure is adopted, combined with stepper motor, electric push rod and remote controller, the height and angle adjustment of the walking frame and conveyor belt is realized, and the limit support is provided through the slide rail and pulley to ensure the precise positioning of the wall and the convenient transportation of bricks.

Benefits of technology

It improves the construction quality and efficiency of wall building, reduces construction errors, reduces workers' labor intensity, and improves brick delivery efficiency.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN223305453U_ABST
    Figure CN223305453U_ABST
Patent Text Reader

Abstract

The utility model discloses a building wall building auxiliary device which comprises a lifting trolley and a lifting frame, the lifting frame is installed in the center of the top end of the lifting trolley, a walking frame is arranged on the side wall of the lifting frame in a sliding mode, and a transverse conveying belt is installed on the outer wall of the side, away from the lifting frame, of the walking frame. A scale plate is installed on the outer wall of the side, away from the walking frame, of the transverse conveying belt, a feeding trolley is arranged outside the lifting trolley on one side of the scale plate, a conveying frame is arranged at the top of the feeding trolley, and an inclined conveying belt is installed in the conveying frame. According to the lifting type brick conveying device, convenient lifting type positioning adjusting auxiliary wall building and lifting type brick conveying are achieved, accurate positioning and adjusting can be conveniently conducted on building wall building of different heights, brick conveying of wall bodies of different heights is conveniently adapted, the construction quality and efficiency of a whole building project are improved, and the construction cost is reduced. And the brick delivery efficiency of the construction project is improved.
Need to check novelty before this filing date? Find Prior Art

Description

Technical Field

[0001] The utility model relates to the technical field of auxiliary devices, in particular to a building wall-building auxiliary device. Background Art

[0002] Masonry engineering, also known as block masonry engineering, refers to the use of ordinary clay bricks, load-bearing clay hollow bricks, autoclaved sand-lime bricks, fly ash bricks, various small and medium-sized blocks and stones and other materials for masonry engineering in construction projects. It includes brickwork, stone, block and lightweight wall panels, etc., brickwork, stone masonry, block brick masonry has requirements for masonry materials, assembly technology, quality requirements and prevention and control measures for common quality problems. Masonry is building walls, and the most solid way to build walls is to build them block by block. When building walls, most owners still choose conventional labor and construction methods as before. The walls of houses built in this way can play a role in temperature buffering, thereby ensuring moderate indoor temperature and humidity.

[0003] For example, a building wall-building auxiliary device disclosed in the authorization announcement number CN221053232U includes an auxiliary frame, a wall-building reference plate, a pull rope and a counterweight rod, wherein the auxiliary frame includes a vertical rod, two vertical rods are provided, sleeves are symmetrically welded at both ends of the wall-building reference plate, the sleeves correspond to the vertical rods one-to-one, and the sleeves are movably nested on the outside of the vertical rods, a plate ear is welded on one side of the wall-building reference plate, a base is welded at the bottom ends of the two vertical rods, and a top plate is welded at the top ends of the two vertical rods, a through hole is opened at one end of the plate ear, and one end of the pull rope passes through the through hole inside the plate ear and is tied to the plate ear;

[0004] Although it realizes the use of a wall reference board to refer to the placement of bricks during wall construction, the elevation of the wall reference board is controlled by a pull rope. When laying the wall layer by layer, the wall reference board can be raised synchronously by simply pulling the pull rope, which serves as a reference for wall construction, making the work more efficient and more practical;

[0005] However, the problem that the existing auxiliary device is not conducive to convenient lifting positioning and adjustment of auxiliary wall building and lifting brick transportation when in use, is not conducive to accurate positioning and adjustment of wall building of buildings of different heights, and is not conducive to adapting to the transportation of bricks of walls of different heights, greatly affecting the construction quality and efficiency of the entire construction project, and affecting the efficiency of delivering bricks in the construction project. Utility Model Content

[0006] The purpose of the present utility model is to provide a building wall-building auxiliary device to solve the problem that the auxiliary device proposed in the above-mentioned background technology is not convenient for convenient lifting positioning and adjustment of auxiliary wall-building and lifting brick transportation, is not conducive to accurate positioning and adjustment of building walls of different heights, is not conducive to adapting to the transportation of bricks of walls of different heights, affects the construction quality and efficiency of the entire construction project, and affects the efficiency of delivering bricks in the construction project.

[0007] Base comprises support, castor, and frame upper is provided with guide rail, and support and conveyer frames movable end contact site are provided with recoil spring, and castor is arranged on the pin of base bottom four, to carry mobile handler location.

[0008] Preferably, slide rails are symmetrically installed on the side wall of the lifting frame on one side of the walking frame, and slide seats are slidably installed on the side of the slide rails close to the walking frame, and the slide seats are fixedly connected to the walking frame.

[0009] Preferably, a pulley assembly is provided at the output end of the stepper motor, a transmission shaft is movably mounted on the top end of the lifting frame on one side of the pulley assembly, and the pulley assembly extends to the surface of the transmission shaft.

[0010] Preferably, sprockets are symmetrically mounted on the outer wall of the transmission shaft on one side of the pulley assembly, and chains are installed on the outer walls of the sprockets. One end of the chain is connected to the top of the counterweight block, and the other end of the chain is connected to the top of the walking frame.

[0011] Preferably, an electric push rod is symmetrically and movably installed on the top of the feeding trolley, a transmission rod is installed on the output end of each of the electric push rods, a linkage shaft is movably installed on the top of each of the transmission rods, and the transmission rods are movably connected to the conveying frame through the linkage shaft.

[0012] Preferably, the bottom end of the electric push rod is movably installed with a clamping shaft, and the electric push rod is movably connected to the feeding trolley through the clamping shaft, a lower base is installed on the side of the top of the feeding trolley away from the electric push rod, and an upper base is installed at the bottom end of the conveying frame above the lower base, a hinge shaft is movably installed on the outer wall of the upper base, and the upper base is movably connected to the lower base through the hinge shaft.

[0013] Preferably, a telescopic sleeve is installed on the side wall of the lifting frame on one side of the lifting trolley, and five groups of limiting grooves with equal intervals are provided on the top of the telescopic sleeve.

[0014] Preferably, a telescopic rod is slidably mounted inside the telescopic sleeve below the limiting groove, and the telescopic rod extends to the outside of the telescopic sleeve.

[0015] Preferably, a limiting pin is provided inside the limiting groove on one side of the telescopic sleeve, and connecting arms are symmetrically installed on the top of the telescopic rod close to the feeding trolley, and the connecting arms all extend to the surface of the feeding trolley.

[0016] Preferably, a remote controller is installed on the top of the feeding trolley on one side of the connecting arm, and the output end of the remote controller is electrically connected to the input ends of the oblique conveyor belt, the transverse conveyor belt, the stepper motor and the electric push rod.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows: the auxiliary device not only realizes convenient lifting positioning and adjustment of auxiliary wall construction, lifting brick delivery, facilitates accurate positioning and adjustment of wall construction of buildings of different heights, facilitates brick delivery to adapt to walls of different heights, improves the construction quality and efficiency of the entire construction project, but also improves the efficiency of brick delivery in the construction project;

[0018] (1) The stepper motor drives the transmission shaft to rotate through the pulley assembly, the transmission shaft drives the sprocket to rotate, the sprocket drives the chain to move, the chain drives the traveling frame to move upward, and the counterweight drives the chain to move downward, so as to facilitate the adjustment of the height of the traveling frame, the transverse conveyor belt, and the scale plate. The traveling frame drives the slide to move, and the slide slides on the surface of the slide rail for position support, and the counterweight drives the pulley to move, and the pulley slides on the surface of the rail for position support, so as to facilitate the positioning and masonry of walls of different heights, thereby realizing the convenient lifting positioning and adjustment of the auxiliary masonry device for building masonry, facilitating the precise positioning and adjustment of masonry of building walls of different heights, reducing construction errors, and improving the construction quality and efficiency of the entire construction project;

[0019] (2) The electric push rod drives the linkage shaft to move through the transmission rod, and the linkage shaft drives the conveyor frame and the oblique conveyor belt to rotate with the hinge shaft as the axis. The conveyor frame supports the hinge shaft through the upper base to facilitate the adjustment of the inclination angle of the oblique conveyor belt. The delivery personnel can place the bricks on the top of the oblique conveyor belt in turn, and the oblique conveyor belt transports them to the top of the transverse conveyor belt. The transverse conveyor belt transports the bricks transported by the oblique conveyor belt to the position of the wall builders to facilitate the wall builders to use them for wall building. When the oblique conveyor belt is adjusted to a good angle, the delivery personnel pulls out the limit pin from the inside of the limit slot, and at the same time pulls out the telescopic rod from the inside of the telescopic sleeve to a certain length. The delivery personnel reinserts the limit pin into the inside of the limit slot, and the telescopic rod is connected to the feeding trolley through the connecting arm, realizing the convenient lifting and conveying of bricks by the building wall auxiliary device, facilitating the delivery of bricks to walls of different heights, reducing the labor intensity of workers in delivering bricks, and improving the efficiency of delivering bricks in construction projects. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the three-dimensional structure of the utility model;

[0021] Figure 2 This is a schematic diagram of the three-dimensional structure of the stepping motor of the present invention;

[0022] Figure 3 This is a three-dimensional structural diagram of the lifting trolley of the present utility model;

[0023] Figure 4 This is a schematic diagram of the three-dimensional structure of the slide rail of the present invention;

[0024] Figure 5 This is a schematic diagram of the three-dimensional structure of the electric push rod of the present utility model;

[0025] Figure 6 This is a front view structural diagram of the linkage shaft of the present utility model;

[0026] Figure 7 It is a front view structural diagram of the track of the present utility model.

[0027] In the figure: 1. Lifting trolley; 2. Lifting frame; 3. Horizontal conveyor belt; 4. Scale plate; 5. Feeding trolley; 6. Conveyor frame; 7. Oblique conveyor belt; 8. Stepper motor; 9. Counterweight; 10. Limit pin; 11. Pulley assembly; 12. Drive shaft; 13. Limit groove; 14. Sprocket; 15. Chain; 16. Connecting arm; 17. Telescopic rod; 18. Pulley; 19. Articulated shaft; 20. Upper base; 21. Lower base; 22. Drive rod; 23. Electric push rod; 24. Linkage shaft; 25. Remote controller; 26. Traveling frame; 27. Card shaft; 28. Track; 29. ​​Slide rail; 30. Slide seat; 31. Telescopic sleeve. DETAILED DESCRIPTION

[0028] In order to further illustrate the technical means and effects adopted by the present invention to achieve the predetermined purpose of the utility model, the following is a detailed description of the specific implementation method, structure, characteristics and effects of the present invention in combination with the accompanying drawings and preferred embodiments.

[0029] See also Figure 1-7The utility model provides an embodiment: a building wall auxiliary device, including a lifting trolley 1 and a lifting frame 2, the lifting frame 2 is installed at the center position of the top of the lifting trolley 1, a walking frame 26 is slidably provided on the side wall of the lifting frame 2, a transverse conveyor belt 3 is installed on the outer wall of the walking frame 26 away from the lifting frame 2, a scale plate 4 is installed on the outer wall of the transverse conveyor belt 3 away from the walking frame 26, a feeding trolley 5 is provided on the outside of the lifting trolley 1 on one side of the scale plate 4, and a conveying trolley 5 is provided on the top of the feeding trolley 5. Frame 6, an oblique conveyor belt 7 is installed inside the conveyor frame 6, and the conveyor frame 6 extends to the outside of the transverse conveyor belt 3, a counterweight block 9 is slidably installed inside the lifting frame 2 above the lifting trolley 1, and a track 28 is symmetrically installed on the inner wall of the lifting frame 2 on one side of the counterweight block 9, and a pulley 18 is symmetrically and movably installed on the side wall of the counterweight block 9 on one side of the track 28, and the pulleys 18 are all slidably connected to the track 28. A stepper motor 8 is installed at the center position of the top of the lifting frame 2 above the counterweight block 9, and the stepper motor 8 plays the role of power drive;

[0030] A slide rail 29 is symmetrically mounted on the side wall of the lifting frame 2 on one side of the traveling frame 26. A slide seat 30 is slidably mounted on the side of the slide rail 29 close to the traveling frame 26, and the slide seats 30 are fixedly connected to the traveling frame 26. A pulley assembly 11 is provided at the output end of the stepping motor 8. A transmission shaft 12 is movably mounted on the top of the lifting frame 2 on one side of the pulley assembly 11, and the pulley assembly 11 extends to the surface of the transmission shaft 12.

[0031] A sprocket 14 is symmetrically mounted on the outer wall of the transmission shaft 12 on one side of the pulley assembly 11. A chain 15 is mounted on the outer wall of each sprocket 14. One end of each chain 15 is connected to the top of the counterweight 9, and the other end of each chain 15 is connected to the top of the traveling frame 26.

[0032] By operating the remote controller 25 to turn on the stepper motor 8, under the support of the lifting frame 2, the stepper motor 8 drives the transmission shaft 12 to rotate through the pulley assembly 11, the transmission shaft 12 drives the sprocket 14 to rotate, the sprocket 14 drives the chain 15 to move, the chain 15 drives the traveling frame 26 to move upward, and the counterweight 9 drives the chain 15 to move downward, so as to facilitate the adjustment of the height of the traveling frame 26, the transverse conveyor belt 3, and the scale plate 4. The traveling frame 26 drives the slide 30 to move, and the slide 30 slides on the surface of the slide rail 29 for limit support, and the counterweight 9 drives the pulley 18 to move, and the pulley 18 slides on the surface of the track 28 for limit support, so as to facilitate the positioning and masonry processing of walls of different heights, thereby realizing the convenient lifting positioning and adjustment auxiliary masonry of the building masonry auxiliary device, facilitating the precise positioning and adjustment of the masonry of building walls of different heights, reducing the construction error, and improving the construction quality and efficiency of the entire construction project;

[0033] The top of the feeding trolley 5 is symmetrically and movably mounted with an electric push rod 23, the output end of the electric push rod 23 is mounted with a transmission rod 22, the top of the transmission rod 22 is movably mounted with a linkage shaft 24, and the transmission rod 22 is movably connected to the conveying frame 6 through the linkage shaft 24;

[0034] The bottom ends of the electric push rods 23 are all movably mounted with a clamping shaft 27, and the electric push rods 23 are all movably connected to the feeding trolley 5 through the clamping shaft 27. A lower base 21 is mounted on the side of the top of the feeding trolley 5 away from the electric push rods 23. An upper base 20 is mounted on the bottom end of the conveying frame 6 above the lower base 21. A hinge shaft 19 is movably mounted on the outer wall of the upper base 20, and the upper base 20 is movably connected to the lower base 21 through the hinge shaft 19.

[0035] A telescopic sleeve 31 is installed on the side wall of the lifting frame 2 on one side of the lifting trolley 1. Five groups of limit grooves 13 with equal intervals are provided on the top of the telescopic sleeve 31. A telescopic rod 17 is slidably installed inside the telescopic sleeve 31 below the limit grooves 13, and the telescopic rod 17 extends to the outside of the telescopic sleeve 31. A limit pin 10 is provided inside the limit groove 13 on one side of the telescopic sleeve 31. Connecting arms 16 are symmetrically installed on the top of the telescopic rod 17 on the side close to the feeding trolley 5, and both connecting arms 16 extend to the surface of the feeding trolley 5.

[0036] A remote controller 25 is installed on the top of the feeding trolley 5 on one side of the connecting arm 16, and the output end of the remote controller 25 is electrically connected to the input end of the oblique conveyor belt 7, the transverse conveyor belt 3, the stepper motor 8, and the electric push rod 23;

[0037] By operating the remote controller 25 to open the electric push rod 23, the feeding trolley 5 movably supports the electric push rod 23 through the card shaft 27, and the electric push rod 23 drives the linkage shaft 24 to move through the transmission rod 22. The linkage shaft 24 drives the conveyor frame 6 and the oblique conveyor belt 7 to rotate with the hinge shaft 19 as the axis. The feeding trolley 5 movably supports the hinge shaft 19 through the lower base 21, and the conveyor frame 6 movably supports the hinge shaft 19 through the upper base 20 to facilitate the adjustment of the inclination angle of the oblique conveyor belt 7. The delivery personnel can place the bricks on the top of the oblique conveyor belt 7 in turn, and the oblique conveyor belt 7 is transported to the top of the transverse conveyor belt 3 by the oblique conveyor belt 7. At the same time, the transverse conveyor belt 3 is opened by operating the remote controller 25, and the transverse conveyor belt 3 supports the oblique conveyor belt 7. The bricks transported by the conveyor belt 7 are transported to the position of the wall builders to facilitate the wall builders to use them. After the angle of the oblique conveyor belt 7 is adjusted, the delivery personnel pull out the limit pin 10 from the inside of the limit groove 13, and at the same time pull out the telescopic rod 17 to a certain length inside the telescopic sleeve 31. The delivery personnel reinsert the limit pin 10 into the inside of the limit groove 13, and the telescopic rod 17 is connected to the feeding trolley 5 through the connecting arm 16 to prevent the oblique conveyor belt 7 and the transverse conveyor belt 3 from being offset during transportation, thereby realizing the convenient lifting and conveying of bricks by the building wall auxiliary device, facilitating the conveying of bricks to walls of different heights, reducing the labor intensity of workers in delivering bricks, and improving the efficiency of delivering bricks in construction projects.

[0038] Working principle: When in use, an external power supply is connected. First, the masonry workers will move the device to the designated building wall position by lifting the trolley 1. At this time, the scale plate 4 is in contact with the wall outside the designated building wall position. The masonry workers can use the horizontal position of the scale plate 4 as the critical position to ensure that each layer of wall is built quickly and firmly. The stepper motor 8 drives the transmission shaft 12 to rotate through the pulley assembly 11, and the transmission shaft 12 drives the sprocket 14 to rotate. The sprocket 14 drives the chain 15 to move, and the chain 15 drives the traveling frame 26 to move upward, and the counterweight block 9 drives the chain 15 to move downward to facilitate the adjustment of the height of the traveling frame 26, the transverse conveyor belt 3, and the scale plate 4. The traveling frame 26 drives the slide 30 to move, and the slide 30 slides on the surface of the slide rail 29 for limit support. The counterweight block 9 drives the pulley 18 to move, and the pulley 18 slides on the surface of the track 28 for limit support to facilitate the positioning and masonry processing of walls of different heights. The electric push rod 23 drives the linkage shaft 24 to move through the transmission rod 22. The linkage shaft 24 drives the conveyor frame 6 and the oblique conveyor belt 7 to rotate with the hinge shaft 19 as the axis, and the feeding trolley 5 movably supports the hinge shaft 19 through the lower base 21, and the conveyor frame 6 movably supports the hinge shaft 19 through the upper base 20, so as to facilitate the adjustment of the inclination angle of the oblique conveyor belt 7. The delivery personnel can place bricks on the top of the oblique conveyor belt 7 in sequence, and the oblique conveyor belt 7 is transported to the top of the transverse conveyor belt 3. The transverse conveyor belt 3 transports the bricks transported by the oblique conveyor belt 7 to the position of the wall builders, so as to facilitate the wall builders to use it. When the angle of the oblique conveyor belt 7 is adjusted, the delivery personnel pulls out the limit pin 10 from the inside of the limit groove 13, and at the same time pulls out the telescopic rod 17 to a certain length inside the telescopic sleeve 31. The delivery personnel reinserts the limit pin 10 into the inside of the limit groove 13, and the telescopic rod 17 is connected to the feeding trolley 5 through the connecting arm 16 to prevent the oblique conveyor belt 7 and the transverse conveyor belt 3 from offsetting the angle during transportation, thereby completing the use of the auxiliary device.

[0039] The above description is merely a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as a preferred embodiment as above, it is not intended to limit the present invention. Any person skilled in the art can make some changes or modifications to equivalent embodiments using the technical contents disclosed above without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A building wall auxiliary device, comprising a lifting trolley and a lifting frame, characterized in that: The lifting frame is installed at the center position of the top of the lifting trolley, and a walking frame is slidingly provided on the side wall of the lifting frame, and a transverse conveyor belt is installed on the outer wall of the walking frame away from the lifting frame, and a scale plate is installed on the outer wall of the transverse conveyor belt away from the walking frame. A feeding trolley is provided on the outside of the lifting trolley on the side of the scale plate, and a conveying frame is provided on the top of the feeding trolley, and an oblique conveyor belt is installed inside the conveying frame, and the conveying frame extends to the outside of the transverse conveyor belt. A counterweight block is slidably installed inside the lifting frame above the lifting trolley, and a track is symmetrically installed on the inner wall of the lifting frame on one side of the counterweight block, and pulleys are symmetrically and movably installed on the side wall of the counterweight block on one side of the track, and the pulleys are all slidably connected to the track, and a stepping motor is installed at the center position of the top of the lifting frame above the counterweight block.

2. A building wall auxiliary device according to claim 1, characterized in that: Slide rails are symmetrically installed on the side wall of the lifting frame on one side of the walking frame, and slide seats are slidably installed on the side of the slide rails close to the walking frame, and the slide seats are fixedly connected to the walking frame.

3. The building wall auxiliary device according to claim 1, characterized in that: The output end of the stepper motor is provided with a pulley assembly, a transmission shaft is movably mounted on the top end of the lifting frame on one side of the pulley assembly, and the pulley assembly extends to the surface of the transmission shaft.

4. A building wall auxiliary device according to claim 3, characterized in that: Sprockets are symmetrically mounted on the outer wall of the transmission shaft on one side of the pulley assembly, and chains are installed on the outer walls of the sprockets. One end of the chain is connected to the top of the counterweight block, and the other end of the chain is connected to the top of the walking frame.

5. The building wall auxiliary device according to claim 1, characterized in that: The top of the feeding trolley is symmetrically and movably installed with an electric push rod, the output end of the electric push rod is installed with a transmission rod, the top of the transmission rod is movably installed with a linkage shaft, and the transmission rod is movably connected to the conveying frame through the linkage shaft.

6. A building wall auxiliary device according to claim 5, characterized in that: The bottom end of the electric push rod is movably installed with a clamping shaft, and the electric push rod is movably connected to the feeding trolley through the clamping shaft. A lower base is installed on the side of the top of the feeding trolley away from the electric push rod, and an upper base is installed at the bottom end of the conveying frame above the lower base. A hinge shaft is movably installed on the outer wall of the upper base, and the upper base is movably connected to the lower base through the hinge shaft.

7. The building wall auxiliary device according to claim 1, characterized in that: A telescopic sleeve is installed on the side wall of the lifting frame on one side of the lifting trolley, and five groups of limiting grooves with equal intervals are arranged on the top of the telescopic sleeve.

8. The building wall auxiliary device according to claim 7, characterized in that: A telescopic rod is slidably mounted inside the telescopic sleeve below the limiting groove, and the telescopic rod extends to the outside of the telescopic sleeve.

9. The building wall auxiliary device according to claim 8, characterized in that: A limiting pin is provided inside the limiting groove on one side of the telescopic sleeve, and connecting arms are symmetrically installed on the top of the telescopic rod close to the feeding trolley, and the connecting arms all extend to the surface of the feeding trolley.

10. The building wall auxiliary device according to claim 9, characterized in that: A remote controller is installed on the top of the feeding trolley on one side of the connecting arm, and the output end of the remote controller is electrically connected to the input ends of the oblique conveyor belt, the transverse conveyor belt, the stepping motor and the electric push rod.

Citation Information

Patent Citations

  • A building wall auxiliary device

    CN221053232U