Empty drum detection equipment for building outer wall facing

Abstract

The invention discloses hollowing detection equipment for a building outer wall facing, and belongs to the technical field of wall surface detection, through arrangement of a deflection mechanism and a knocking mechanism, a knocking column changes the angle of knocking a wall surface along with deflection of a shell, and since the knocking column rotates and deflects with the tail end of a first mounting frame as the axis, the knocking angle is changed, and the detection accuracy is improved. And the deviation amplitude is regulated and controlled through sliding of the mounting base on the adjusting frame, so that the aim of accurately controlling the impact angle of the knocking column is achieved, meanwhile, through the arrangement of the first mounting frame and the adjusting frame, the shell deviates with the tail end of the knocking column as the axis, and therefore it is guaranteed that the distance between the deflected knocking column and the wall surface is not changed, and the impact angle of the knocking column is accurately controlled. According to the technical scheme, only the included angle between the knocking column and the wall surface is adjusted, the knocking column conducts knocking at the same knocking position at different angles, the hollowing type such as local hollowing or interlayer hollowing is judged according to sound wave reflection paths generated by impact at different angles in combination with listening equipment, and therefore a proper repairing scheme is formulated.

Description

Technical Field

[0001] The present invention relates to the technical field of wall detection, and particularly to an empty drum detection device for building exterior wall finishes. Background Art

[0002] The detection of the strength of building exterior wall finishes is an important means to ensure the bonding strength between the exterior wall finish materials and the base wall and the strength of the finish materials themselves. The detection results directly affect the safety, durability, and aesthetics of the building;

[0003] There should be no empty drums or cracks in the exterior wall facing brickwork. If there are empty drums between the facing bricks and the base layer, under the action of wind pressure, self-weight, or external force, the bricks may fall off, posing a safety hazard. Moreover, empty drums are likely to cause structural damages such as cracks or holes that damage the integrity of the facing bricks, allowing rainwater to penetrate into the base layer, leading to the deterioration of the base materials and further aggravating the structural damage;

[0004] By using an empty drum hammer or a metal rod to gently tap the wall surface and judging the empty drums through the sound, the empty drum area emits a clear knocking sound, while the dense area emits a dull knocking sound. When empty drums are found, the bricks need to be reprocessed or replaced. The traditional empty drum hammer is designed mainly for vertical impact. However, when conducting knocking detection on vulnerable wall surfaces such as lightweight partition boards and gypsum boards, as well as areas that are difficult to cover such as the edges and corners of the wall surface, it is more reasonable to choose the inclined impact method, which can reduce the damage to the soft wall surface, increase the detection depth. When conducting an impact at an inclination of 45°, the bonding condition between the wall surface edge and the base layer can be judged more clearly, avoiding missed detections;

[0005] However, when conducting inclined impact detection, it is necessary to accurately control the impact angle and force, which is overly dependent on the personal experience of the operator. Especially when multi-angle detection is required, the misjudgment rate of novices using the inclined impact method is relatively high. At the same time, inclined impact requires special tools, such as an impact head with an adjustable angle, and the actual operation is difficult. Summary of the Invention

[0006] The purpose of the present invention is to: solve the problem that when conducting inclined impact detection, it is necessary to accurately control the impact angle and force, which is overly dependent on the personal experience of the operator. Especially when multi-angle detection is required, the misjudgment rate of novices using the inclined impact method is relatively high. At the same time, inclined impact requires special tools, such as an impact head with an adjustable angle, and the actual operation is difficult, and to propose an empty drum detection device for building exterior wall finishes.

[0007] In order to achieve the above purpose, the present invention adopts the following technical solution: an empty drum detection device for building exterior wall finishes:

[0008] It includes two symmetrically arranged frames and a knocking column. A liftable deflection mechanism is installed on the two frames. The deflection mechanism includes an arc-shaped adjustment frame and a first mounting frame arranged on the adjustment frame. The end of the first mounting frame is located at the center of the circle of the adjustment frame, and a mounting seat that can slide along the arc edge of the adjustment frame is embedded in the adjustment frame;

[0009] A knocking mechanism is rotatably installed between the two adjustment frames. The knocking mechanism includes a connecting shaft rotatably arranged on the first mounting frame and a housing connected to the two connecting shafts. The two mounting seats are connected to both sides of the housing, so that the housing drives the mounting seats to deflect around the connecting shaft under the restriction of the adjustment frame;

[0010] A movable rod that can rotate and reciprocate simultaneously is arranged in the housing. The knocking column is installed at the end of the movable rod, and the knocking column changes the angle when knocking on the wall surface as the housing deflects.

[0011] As a further description of the above-mentioned technology, a hollow detection device for building exterior wall finishes:

[0012] The end of the first mounting frame can also be set as an arc-shaped groove, and the centers of the arc-shaped groove and the adjustment frame are both located at the end of the knocking column. The connecting shaft is slidably embedded in the arc-shaped groove, so that the housing can deflect around the end of the knocking column, and the distance between the deflected knocking column and the wall surface remains unchanged.

[0013] As a further description of the above-mentioned technology, a hollow detection device for building exterior wall finishes:

[0014] After the mounting seat slides on the adjustment frame, it is locked by a locking member. The locking member includes a mounting groove arranged in the middle of the mounting seat and an adjustment rod passing through the middle of the mounting groove. The adjustment rod can slide and rotate in the mounting groove and a first spring is wound around its surface;

[0015] The end of the adjustment rod is connected with a positioning pin passing through the mounting groove. One side of the positioning pin is inclined. The two ends of the first spring are respectively in contact with the positioning pin and the mounting groove;

[0016] A number of positioning grooves for the positioning pin to insert are equidistantly arranged on the arc surfaces of the two adjustment frames, and the two rows of positioning grooves are staggered with each other, so that at least one positioning pin is inserted into the positioning groove when the housing deflects;

[0017] When the inclined surface of the positioning pin abuts against the inner wall of the positioning groove, the positioning pin slides out of the positioning groove.

[0018] As a further description of the above-mentioned technology, a hollow detection device for building exterior wall finishes:

[0019] The inclination direction of the inclined surface of the positioning pin can be adjusted by rotation, and the mounting seat can only slide in the direction towards the inclined surface of the positioning pin;

[0020] When the inclined surface of the positioning pin is adjusted to a state perpendicular to the sliding direction of the mounting seat, the positioning pin cannot slide out of the positioning groove, locking the position of the mounting seat.

[0021] As a further description of the above-mentioned technology, an equipment for detecting hollowing on the exterior wall finish of a building:

[0022] The knocking mechanism further includes a second mounting frame installed on the inner wall of the housing and a positioning cavity penetrating through the middle of the second mounting frame. The movable rod is rotatably installed in the positioning cavity, and a second spring is wound around the surface of the movable rod. The two ends of the second spring are respectively in contact with the positioning cavity and the movable rod.

[0023] As a further description of the above-mentioned technology, an equipment for detecting hollowing on the exterior wall finish of a building:

[0024] The rotation of the movable rod is driven by a driving mechanism. The driving mechanism includes a servo motor installed in the housing and a telescopic rod rotatably arranged. The end of the telescopic rod is connected to the movable rod, and a transmission gear is sleeved on the surface of the telescopic rod;

[0025] A first bearing seat rotatably connected to the output end of the servo motor is installed in the housing, and a cylindrical gear meshing with the transmission gear is sleeved on the output end of the servo motor.

[0026] As a further description of the above-mentioned technology, an equipment for detecting hollowing on the exterior wall finish of a building:

[0027] The driving mechanism further includes a guide post for driving the movable rod to move reciprocally. A guiding groove is formed on the surface of the guide post. An annular groove is formed on the movable rod, and a guiding shaft is slidably embedded in the annular groove. The end of the guiding shaft is embedded in the guiding groove;

[0028] When the movable rod drives the annular groove to rotate, the position of the guiding shaft remains unchanged under the limitation of the guiding groove. When the guide post rotates with the output end of the servo motor, the guiding shaft drives the movable rod to move reciprocally along with the position change of the guiding groove.

[0029] As a further description of the above-mentioned technology, an equipment for detecting hollowing on the exterior wall finish of a building:

[0030] A rotatable rotating shaft is installed on the mounting seat, and a transmission mechanism for adjusting the position of the mounting seat is arranged on the rotating shaft. The transmission mechanism includes a plurality of first arc-shaped racks slidably installed on the rotating shaft and a second arc-shaped rack installed on the adjusting frame and meshing with the first arc-shaped racks. When the rotating shaft rotates, the mounting seat is driven to slide along the arc of the adjusting frame through the meshing of the first arc-shaped rack and the second arc-shaped rack.

[0031] As a further description of the above-mentioned technology, an equipment for detecting hollowing on the exterior wall finish of a building:

[0032] The transmission mechanism further includes a driving wheel sleeved on the output end of the servo motor and two transmission shafts rotatably installed in the housing. The end of the transmission shaft is rotatably connected to a second bearing seat installed in the housing.

[0033] A driven wheel and a first bevel gear are sleeved on the transmission shaft. A transmission belt is meshed and sleeved on the surfaces of the driving wheel and the two driven wheels. A second bevel gear meshing with the first bevel gear is installed at the end of the rotating shaft, so that the servo motor drives the rotating shaft to rotate.

[0034] As a further description of the above-mentioned technology, a hollow detection device for building exterior wall finishes:

[0035] The position of the first arc-shaped rack is adjusted by an adjusting mechanism. The adjusting mechanism includes a second chute opened on the surface of the rotating shaft and a second slider slidably embedded in the second chute. A threaded rod is rotatably arranged in the second chute. The threaded rod penetrates through the second slider and meshes with the second slider. When the threaded rod rotates, the first arc-shaped rack is driven by the second slider to move and disengage from the second arc-shaped rack.

[0036] One of the technical solutions in the above technical solutions has the following advantages or beneficial effects:

[0037] 1. By setting the deflection mechanism and the knocking mechanism, the knocking column changes the angle when knocking on the wall surface as the housing deflects. Since the knocking column rotates and deflects with the end of the first mounting bracket as the axis, and the deflection amplitude is controlled by the sliding of the mounting seat on the adjusting bracket, the purpose of accurately controlling the impact angle of the knocking column is achieved. And because the change of the impact direction of the knocking column is not related to the structure of the knocking column itself, there is no need to use an impact head that can adjust the angle by itself, further reducing the operation difficulty. At the same time, by setting the first mounting bracket and the adjusting bracket, the housing deflects with the end of the knocking column as the axis, so as to ensure that the distance between the deflected knocking column and the wall surface remains unchanged, only adjusting the included angle between the knocking column and the wall surface. According to different detection requirements, the knocking column knocks at the same knocking position at different angles. According to the sound wave reflection paths generated by impacts at different angles, combined with the listening device, the type of hollowing, such as local hollowing or interlayer hollowing, can be judged, so as to formulate a suitable repair plan;

[0038] 2. Through the provided driving mechanism and transmission mechanism, while the servo motor drives the knocking column to rotate and reciprocate, the servo motor drives the two driven wheels to rotate through the driving wheel and the transmission belt. The driven wheels drive the first bevel gear to rotate through the transmission shaft, enabling the first bevel gear to drive the rotating shaft to rotate through the second bevel gear, thereby achieving the purpose of driving the rotating shaft to rotate through the servo motor. As the rotating shaft drives the first arc-shaped rack to rotate, the purpose of automatically deflecting the angle of the knocking column during the knocking process is achieved. By moving all the first arc-shaped racks, the mounting seat can no longer slide automatically through the engagement of the first arc-shaped rack and the second arc-shaped rack, and thus the automatic deflection function of the knocking column can be turned off. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 Fig. 6 shows a first three-dimensional structural schematic diagram of a hollow detection device for building exterior wall finishes;

[0040] Figure 2 Fig. 10 shows a second three-dimensional structural schematic diagram of a hollow detection device for building exterior wall finishes;

[0041] Figure 3 Fig. 14 shows a three-dimensional sectional structural schematic diagram of a hollow detection device for building exterior wall finishes;

[0042] Figure 4 Fig. 18 shows Figure 3 an enlarged structural schematic diagram of part A in Fig. 18;

[0043] Figure 5 Fig. 24 shows a three-dimensional structural schematic diagram of the frame body and the deflection mechanism;

[0044] Figure 6 Fig. 28 shows a three-dimensional structural schematic diagram of the deflection mechanism;

[0045] Figure 7 Fig. 32 shows a front sectional structural schematic diagram of the deflection mechanism;

[0046] Figure 8 Fig. 36 shows Figure 7 an enlarged structural schematic diagram of part B in Fig. 36;

[0047] Figure 9 Fig. 42 shows a partial three-dimensional sectional structural schematic diagram of the knocking mechanism;

[0048] Figure 10 Fig. 46 shows a first front sectional structural schematic diagram of the knocking mechanism, the driving mechanism, and the knocking column;

[0049] Figure 11 Fig. 50 shows a second front sectional structural schematic diagram of the knocking mechanism, the driving mechanism, and the knocking column;

[0050] Figure 12Shows a partial three-dimensional structural schematic diagram of the driving mechanism;

[0051] Figure 13 Shows a three-dimensional split structural schematic diagram of the movable rod and the guide column;

[0052] Figure 14 Shows a partial three-dimensional sectional structural schematic diagram of the transmission mechanism;

[0053] Figure 15 Shows a top view sectional structural schematic diagram of the deflection mechanism;

[0054] Figure 16 Shows a three-dimensional structural schematic diagram of the tooth ring adjusting its position through the adjusting mechanism.

[0055] Legend Explanation:

[0056] 10. Frame body; 11. Underframe; 12. Folding arm; 13. Fixed shaft;

[0057] 20. Deflection mechanism; 21. Adjusting frame; 211. First chute; 212. Positioning groove; 22. Mounting seat; 221. First slider; 23. Rotating shaft; 24. Locking part; 241. Mounting groove; 242. Adjusting rod; 243. First spring; 244. Positioning pin; 25. First mounting frame;

[0058] 30. Knocking mechanism; 31. Outer shell; 311. Connecting shaft; 312. Grip; 32. Second mounting frame; 33. Positioning cavity; 34. Movable rod; 341. Second spring;

[0059] 40. Knocking column;

[0060] 50. Driving mechanism; 51. Servo motor; 52. Cylindrical gear; 53. Guide column; 531. Guide groove; 532. Annular groove; 533. Guide shaft; 54. First bearing seat; 55. Telescopic rod; 56. Transmission gear;

[0061] 60. Transmission mechanism; 61. Driving wheel; 62. Transmission shaft; 63. Driven wheel; 64. Transmission belt; 65. First bevel gear; 66. Second bearing seat; 67. Second bevel gear; 68. First arc-shaped rack; 69. Second arc-shaped rack;

[0062] 70. Adjusting mechanism; 71. Second chute; 72. Threaded rod; 73. Second slider. Detailed Implementation Manner

[0063] The following will clearly and completely describe a hollow detection device for building exterior wall finishes in combination with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0064] In order to solve the problems that when performing inclined impact detection, it is necessary to accurately control the impact angle and force, which is overly dependent on the personal experience of the operator. Especially when multi-angle detection is required, the misjudgment rate of novices using the inclined impact method is relatively high. At the same time, inclined impact requires special tools, such as an impact head with an adjustable angle, and the actual operation difficulty is relatively large. The present invention proposes a hollow detection device for building exterior wall finishes, such as Figure 1 - Figure 16 as shown:

[0065] It includes two symmetrically arranged frames 10 and a knocking column 40. Among them, the frame 10 includes a bottom frame 11 placed on the ground for support and a folding arm 12 rotatably connected to the bottom frame 11. As Figure 5 shown, a fixed shaft 13 for locking the folding arm 12 is provided between the bottom frame 11 and the folding arm 12, so that the folding arm 12 cannot rotate and reset by itself;

[0066] An elevating and deflecting mechanism 20 is installed on the two folding arms 12. The deflecting mechanism 20 includes an arc-shaped adjusting frame 21 and a first mounting frame 25 arranged on the adjusting frame 21. The end of the first mounting frame 25 is located at the center of the circle of the adjusting frame 21, and a mounting seat 22 that can slide along the arc edge of the adjusting frame 21 is embedded in the adjusting frame 21. In order to ensure the stability of the sliding of the mounting seat 22, as Figure 15 shown, a first chute 211 with the same radian as the adjusting frame 21 is opened on the outer wall of the adjusting frame 21. A first slider 221 that is slidably embedded in the first chute 211 is provided on the mounting seat 22. With the cooperation of the first slider 221 and the first chute 211, the mounting seat 22 can slide more stably;

[0067] A knocking mechanism 30 is rotatably installed between the two adjusting frames 21. The knocking mechanism 30 includes a connecting shaft 311 rotatably arranged on the first mounting frame 25 and a housing 31 connected to the two connecting shafts 311. The two mounting seats 22 are connected to both sides of the housing 31, so that the housing 31 drives the mounting seat 22 to deflect around the connecting shaft 311 under the restriction of the adjusting frame 21. A handle 312 for convenient holding and adjustment is also provided on the outer wall of the housing 31;

[0068] Inside the housing 31, there is a movable rod 34 that can rotate and reciprocate simultaneously. The knocking column 40 is installed at the end of the movable rod 34, so as to achieve the purpose of changing the angle when knocking on the wall surface as the housing 31 deflects. Since the knocking column 40 rotates and deflects with the end of the first mounting bracket 25 as the axis, and the deflection amplitude is controlled by the sliding of the mounting seat 22 on the adjusting frame 21, the purpose of accurately controlling the impact angle of the knocking column 40 is achieved. And because the change in the impact direction of the knocking column 40 is not related to the structure of the knocking column 40 itself, there is no need to use an impact head that can adjust the angle by itself, further reducing the operation difficulty;

[0069] It should be noted that since the knocking column 40 deflects with the end of the first mounting bracket 25 as the axis, the knocking position of the knocking column 40 will change. The position of the knocking column 40 can be adjusted adaptively by the lifting and deflecting mechanism 20 or by adjusting the position of the bottom frame 11.

[0070] As Figure 6 and Figure 7 shown, according to different detection requirements, sometimes it is necessary to make the knocking column 40 knock at different angles at the same knocking position. According to the sound wave reflection paths generated by impacts at different angles, combined with the listening device, the type of hollowing, such as local hollowing or interlayer hollowing, can be judged, so as to formulate a suitable repair plan;

[0071] The end of the first mounting bracket 25 can also be set as an arc-shaped groove, and the centers of the arc-shaped groove and the adjusting frame 21 are both located at the end of the knocking column 40. The connecting shaft 311 is slidably embedded in the arc-shaped groove. When the knocking column 40 needs to be adjusted, by rotating the housing 31, the housing 31 drives the mounting seat 22 to slide under the restriction of the adjusting frame 21. At the same time, the housing 31 drives the connecting shaft 311 to slide under the restriction of the arc-shaped groove. Under the restrictions of the adjusting frame 21 and the first mounting bracket 25, the housing 31 deflects with the end of the knocking column 40 as the axis, so as to ensure that the distance between the deflected knocking column 40 and the wall surface remains unchanged, and only the included angle between the knocking column 40 and the wall surface is adjusted. Since the knocking position of the knocking column 40 remains unchanged, there is no need to adjust the position of the knocking column 40 adaptively by the lifting and deflecting mechanism 20 or by adjusting the position of the bottom frame 11.

[0072] To ensure the stability of the knocking column 40 during the knocking process, as Figure 7 and Figure 8 shown, after the mounting seat 22 slides on the adjusting frame 21, it is locked by the locking member 24. The locking member 24 includes a mounting groove 241 provided in the middle of the mounting seat 22 and an adjusting rod 242 passing through the middle of the mounting groove 241. The adjusting rod 242 can slide and rotate in the mounting groove 241 and a first spring 243 is wound around its surface;

[0073] The end of the adjusting rod 242 is connected with a positioning pin 244 that penetrates through the installation groove 241. One side of the positioning pin 244 is inclined. The two ends of the first spring 243 are respectively in contact with the positioning pin 244 and the installation groove 241.

[0074] A number of positioning grooves 212 for the positioning pin 244 to insert are equidistantly arranged on the arc surfaces of the two adjusting brackets 21. Through this design, when the mounting seat 22 slides under the restriction of the adjusting bracket 21, the inclined surface of the positioning pin 244 is driven by the installation groove 241 to contact the positioning groove 212. When the inclined surface of the positioning pin 244 abuts against the inner wall of the positioning groove 212, the positioning pin 244 slides into the installation groove 241 and compresses the first spring 243 to generate elastic deformation. At the same time, the positioning pin 244 slides out of the positioning groove 212. After the mounting seat 22 rotates a specified angle, the positioning pin 244 is inserted into the next positioning groove 212 under the push of the elastic deformation recovery of the first spring 243. Under the restriction of the positioning pin 244 and the positioning groove 212, the mounting seat 22 cannot slide in the reverse direction, and the moving directions of the outer shell 31 and the knocking column 40 are restricted.

[0075] It should be noted that the two rows of positioning grooves 212 are staggered with each other, so that at least one positioning pin 244 is inserted into the positioning groove 212 when the outer shell 31 deflects, avoiding the situation that the positioning pins 244 on both sides slide out of the positioning groove 212 at the same time, and the mounting seat 22 and the adjusting bracket 21 completely lose the locking restriction of the positioning pin 244 and the positioning groove 212, resulting in the rapid falling of the outer shell 31 and the knocking column 40 under the action of gravity.

[0076] Furthermore, the inclined surface orientation of the positioning pin 244 can be adjusted by rotation. The mounting seat 22 can only slide in the direction of the inclined surface orientation of the positioning pin 244, so that the mounting seat 22 can be reciprocally adjusted under the restriction of the adjusting bracket 21.

[0077] When the inclined surface orientation of the positioning pin 244 is adjusted to a state perpendicular to the sliding direction of the mounting seat 22, the positioning pin 244 cannot slide out of the positioning groove 212, locking the position of the mounting seat 22. At this time, the knocking column 40 is completely locked, so as to ensure that the impact angle of the knocking column 40 will not be changed twice due to personal operation during the impact, and reduce the difference rate when using the inclined impact method for testing.

[0078] Such as Figure 10 and Figure 11As shown, in order to achieve the reciprocating movement and rotation of the movable rod 34, the knocking mechanism 30 further includes a second mounting bracket 32 installed on the inner wall of the housing 31 and a positioning cavity 33 penetrating through the middle of the second mounting bracket 32. The movable rod 34 is rotatably installed in the positioning cavity 33. A second spring 341 is wound around the surface of the movable rod 34. The two ends of the second spring 341 are respectively in contact with the positioning cavity 33 and the movable rod 34. The elastic deformation of the second spring 341 is used to realize the rapid reset of the movable rod 34. When the knocking column 40 approaches the wall under the push of the second spring 341, it obtains acceleration, improving the impact effect.

[0079] As Figure 12 shown, the rotation of the movable rod 34 is driven by a driving mechanism 50. The driving mechanism 50 includes a servo motor 51 installed in the housing 31 and a telescopic rod 55 rotatably arranged. The end of the telescopic rod 55 is connected to the movable rod 34, and a transmission gear 56 is sleeved on the surface of the telescopic rod 55;

[0080] A first bearing seat 54 rotatably connected to the output end of the servo motor 51 is installed in the housing 31. A cylindrical gear 52 meshing with the transmission gear 56 is sleeved on the output end of the servo motor 51.

[0081] By starting the servo motor 51, the servo motor 51 drives the transmission gear 56 to rotate through the cylindrical gear 52. The transmission gear 56 drives the movable rod 34 to rotate under the restriction of the positioning cavity 33 through the telescopic rod 55, enabling the movable rod 34 to drive the knocking column 40 to rotate;

[0082] At the same time, as Figure 13 shown, the driving mechanism 50 further includes a guide post 53 for driving the reciprocating movement of the movable rod 34. A guiding groove 531 is formed on the surface of the guide post 53. An annular groove 532 is formed on the movable rod 34, and a guiding shaft 533 is slidably embedded in the annular groove 532. The end of the guiding shaft 533 is embedded in the guiding groove 531;

[0083] While driving the cylindrical gear 52 to rotate, the servo motor 51 drives the guide post 53 to rotate. Since the position of the guiding shaft 533 will not change due to the rotation of the movable rod 34 under the restriction of the guiding groove 531 when the movable rod 34 drives the annular groove 532 to rotate, when the guide post 53 drives the guiding groove 531 to rotate, the guiding shaft 533 drives the movable rod 34 to make reciprocating movement with the change of the position of the guiding groove 531. When the knocking column 40 reciprocates and impacts the wall in a rotating state, it can disperse the impact force and reduce the risk of damage to the wall.

[0084] When an arc-shaped groove is provided at the end of the first mounting bracket 25, and the centers of the arc-shaped groove and the adjusting bracket 21 are located at the end of the knocking column 40, and the housing 31 is rotated with the end of the knocking column 40 as the axis, the knocking column 40 can automatically deflect the angle during the knocking process;

[0085] To achieve this effect, as Figure 14 and Figure 15 shown, a rotatable rotating shaft 23 is installed on the mounting base 22, and a transmission mechanism 60 for adjusting the position of the mounting base 22 is provided on the rotating shaft 23. The transmission mechanism 60 includes a plurality of first arc-shaped racks 68 slidably installed on the rotating shaft 23 and a second arc-shaped rack 69 installed on the adjusting frame 21 and meshing with the first arc-shaped racks 68;

[0086] Preferably, four first arc-shaped racks 68 are provided. The four first arc-shaped racks 68 have the same module as the second arc-shaped rack 69 and mesh with each other. The four first arc-shaped racks 68 can be combined into a complete circular tooth ring;

[0087] When the rotating shaft 23 drives the first arc-shaped rack 68 to rotate, the mounting base 22 is driven to slide along the arc of the adjusting frame 21 through the meshing of the first arc-shaped rack 68 and the second arc-shaped rack 69. By sliding and adjusting the positions of no more than three first arc-shaped racks 68 so that they are no longer in the same horizontal position as the second arc-shaped rack 69, the distance that the first arc-shaped rack 68 drives the mounting base 22 to slide through the second arc-shaped rack 69 can be changed, so as to adjust the deflection amplitude of the knocking column 40 without changing the number of knocking times of the knocking column 40 at the same knocking position;

[0088] At the same time, the transmission mechanism 60 further includes a driving wheel 61 sleeved on the output end of the servo motor 51 and two transmission shafts 62 rotatably installed in the housing 31. The end of the transmission shaft 62 is rotatably connected to a second bearing seat 66 installed in the housing 31;

[0089] A driven wheel 63 and a first bevel gear 65 are sleeved on the transmission shaft 62. A transmission belt 64 is meshed and sleeved on the surfaces of the driving wheel 61 and the two driven wheels 63. A second bevel gear 67 meshing with the first bevel gear 65 is installed at the end of the rotating shaft 23. When the servo motor 51 drives the knocking column 40 to rotate and reciprocate, the servo motor 51 drives the two driven wheels 63 to rotate through the driving wheel 61 and the transmission belt 64. The driven wheel 63 drives the first bevel gear 65 to rotate through the transmission shaft 62, so that the first bevel gear 65 drives the rotating shaft 23 to rotate through the second bevel gear 67, thereby achieving the purpose of driving the rotating shaft 23 to rotate through the servo motor 51. As the rotating shaft 23 drives the first arc-shaped rack 68 to rotate, the purpose of automatically deflecting the angle of the knocking column 40 during the knocking process is achieved;

[0090] Preferably, as Figure 15 and Figure 16As shown, the position of the first arc rack 68 is adjusted by an adjusting mechanism 70. The adjusting mechanism 70 includes a second chute 71 opened on the surface of the rotating shaft 23 and a second slider 73 slidably embedded in the second chute 71. A threaded rod 72 is rotatably arranged in the second chute 71. The threaded rod 72 penetrates through the second slider 73 and meshes with the second slider 73. When the threaded rod 72 rotates, it drives the first arc rack 68 to move through the second slider 73, so that the first arc rack 68 no longer meshes with the second arc rack 69;

[0091] At the same time, by moving all the first arc racks 68, the mounting seat 22 can no longer slide automatically through the meshing of the first arc rack 68 and the second arc rack 69, and the automatic deflection function of the knocking column 40 can be turned off.

[0092] Working principle:

[0093] By pulling the folding arm 12, the angle between the folding arm 12 and the chassis 11 is adjusted to a suitable position. The folding arm 12 is unfolded to be horizontal with the wall and fixed with the fixed shaft 13;

[0094] Push or pull the grip 312 to make the housing 31 drive the connecting shaft 311 to rotate and adjust the position. When there is no arc groove at the end of the first mounting bracket 25, the connecting shaft 311 is rotatably installed at the end of the first mounting bracket 25. At this time, the housing 31 rotates around the connecting shaft 311 under the restriction of the adjusting bracket 21 and the mounting seat 22, and the knocking position after the knocking column 40 adjusts the angle changes, which is suitable for top-down continuous testing;

[0095] When there is an arc groove at the end of the first mounting bracket 25, the connecting shaft 311 is slidably embedded in the arc groove, and the centers of the arc groove and the adjusting bracket 21 are both located at the end of the knocking column 40. At this time, the housing 31 rotates around the end of the knocking column 40 under the restriction of the adjusting bracket 21 and the mounting seat 22, as well as the connecting shaft 311 and the arc groove, and the knocking position after the knocking column 40 adjusts the angle does not change, which is suitable for multi-angle and multi-time testing of a certain position;

[0096] During the sliding process of the mounting seat 22 on the adjusting bracket 21, the positioning pin 244 cycles out of and then into the positioning groove 212, ensuring that at least one mounting seat 22 is always fixed on the adjusting bracket 21 through the positioning pin 244 and the positioning groove 212. After the knocking column 40 is adjusted to a suitable angle, if it is not required for the knocking column 40 to deflect automatically during knocking, the position of the knocking column 40 can be locked by rotating the adjusting rod 242 so that the inclined surface of the positioning pin 244 faces perpendicular to the sliding direction of the mounting seat 22;

[0097] When the end of the first mounting bracket 25 is provided with an arc-shaped groove, the knocking position of the knocking column 40 remains unchanged after the angle is adjusted. If it is necessary for the knocking column 40 to deflect automatically during the knocking process, the threaded rod 72 can be rotated to make the second slider 73 slide into the meshing position with the second arc-shaped rack 69 under the restriction of the second chute 71. When all four first arc-shaped racks 68 are moved into the meshing position with the second arc-shaped rack 69, the angle of deflection of the knocking column 40 after one knock is the largest and the number of knocks during the detection process is the least. When only one first arc-shaped rack 68 is moved into the meshing position with the second arc-shaped rack 69, the angle of deflection of the knocking column 40 after one knock is the smallest and the number of knocks during the detection process is the most;

[0098] After the knocking column 40 is set up, the servo motor 51 is started. The servo motor 51 drives the transmission shaft 62 to rotate through the driving wheel 61, the driven wheel 63 and the transmission belt 64, so that the transmission shaft 62 drives the second bevel gear 67 to rotate through the first bevel gear 65. The second bevel gear 67 drives the first arc-shaped rack 68 to rotate through the rotating shaft 23, and cooperates with the second arc-shaped rack 69 to complete the sliding of the driving mount 22 on the adjusting frame 21;

[0099] At the same time, the servo motor 51 drives the transmission gear 56 to rotate through the cylindrical gear 52. The transmission gear 56 drives the movable rod 34 to rotate in the positioning cavity 33 through the telescopic rod 55, and the movable rod 34 drives the knocking column 40 to rotate;

[0100] The servo motor 51 pushes the reciprocating movement guiding shaft 533 through the guiding column 53, so that the guiding shaft 533 drives the movable rod 34 to reciprocate in the positioning cavity 33, so that the knocking column 40 reciprocates when rotating to knock on the wall for hollowing detection.

[0101] As described above, only the preferred specific implementation manner of the present invention is described, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. A hollowing detection device for building exterior wall facings, comprising two symmetrically arranged frames (10) and a knocking column (40), characterized in that: A deflection mechanism (20) that can be lifted and lowered is installed on the two frames (10), the deflection mechanism (20) comprising an arc-shaped adjustment frame (21) and a first mounting frame (25) arranged on the adjustment frame (21), the end of the first mounting frame (25) is located at the center of the adjustment frame (21), and a mounting seat (22) that can slide along the arc edge of the adjustment frame (21) is embedded on the adjustment frame (21); A knocking mechanism (30) is rotatably mounted between the two adjusting frames (21), the knocking mechanism (30) comprising a connecting shaft (311) rotatably mounted on the first mounting frame (25) and a housing (31) connected to the two connecting shafts (311), the two mounting seats (22) being connected to both sides of the housing (31), so that the housing (31) drives the mounting seats (22) to deflect around the connecting shaft (311) under the restriction of the adjusting frames (21); A movable rod (34) capable of rotating and reciprocating simultaneously is arranged in the shell (31), and a knocking column (40) is installed at the end of the movable rod (34). The knocking column (40) changes the angle when knocking the wall surface as the shell (31) deflects.

2. The hollowing detection device for building exterior wall facings according to claim 1 is characterized in that: The end of the first mounting frame (25) can also be configured as an arc groove, and the centers of the arc groove and the adjusting frame (21) are both located at the end of the knocking column (40), and the connecting shaft (311) is slidably embedded in the arc groove, so that the housing (31) can be deflected with the end of the knocking column (40) as the axis, so that the distance between the knocking column (40) and the wall remains unchanged after the deflection.

3. The hollowing detection device for building exterior wall facings according to claim 1 is characterized in that: The mounting seat (22) is locked by a locking member (24) after sliding on the adjustment frame (21); the locking member (24) comprises a mounting groove (241) arranged in the middle of the mounting seat (22) and an adjustment rod (242) penetrating the middle of the mounting groove (241); the adjustment rod (242) can slide and rotate in the mounting groove (241) and has a first spring (243) wound around its surface; The end of the adjusting rod (242) is connected to a positioning pin (244) penetrating the mounting groove (241), one side of the positioning pin (244) is arranged in an inclined shape, and the two ends of the first spring (243) are respectively fitted with the positioning pin (244) and the mounting groove (241); A plurality of positioning grooves (212) for inserting positioning pins (244) are equidistantly formed on the arc surfaces of the two adjustment frames (21), and the two rows of positioning grooves (212) are staggered with each other, so that at least one positioning pin (244) is inserted into the positioning groove (212) when the housing (31) is deflected; When the inclined surface of the positioning pin (244) abuts against the inner wall of the positioning groove (212), the positioning pin (244) slides out of the positioning groove (212).

4. The hollowing detection device for building exterior wall facings according to claim 3 is characterized in that: The positioning pin (244) can adjust the direction of the inclined surface by rotating, and the mounting seat (22) can only slide in the direction of the inclined surface of the positioning pin (244); When the inclined surface of the positioning pin (244) is adjusted to be perpendicular to the sliding direction of the mounting seat (22), the positioning pin (244) cannot slide out of the positioning groove (212), thereby locking the position of the mounting seat (22).

5. The hollowing detection device for building exterior wall facings according to claim 1 is characterized in that: The knocking mechanism (30) further comprises a second mounting frame (32) mounted on the inner wall of the housing (31) and a positioning cavity (33) penetrating the middle of the second mounting frame (32); a movable rod (34) is rotatably mounted in the positioning cavity (33); a second spring (341) is wound around the surface of the movable rod (34); and two ends of the second spring (341) are respectively in contact with the positioning cavity (33) and the movable rod (34).

6. The hollowing detection device for building exterior wall facings according to claim 5 is characterized in that: The rotation of the movable rod (34) is driven by a driving mechanism (50), which comprises a servo motor (51) installed in the housing (31) and a rotatable telescopic rod (55), the end of the telescopic rod (55) is connected to the movable rod (34) and a transmission gear (56) is sleeved on the surface of the telescopic rod (55); A first bearing seat (54) rotatably connected to the output end of the servo motor (51) is installed in the housing (31), and a cylindrical gear (52) meshing with a transmission gear (56) is sleeved and installed on the output end of the servo motor (51).

7. The hollowing detection device for building exterior wall facings according to claim 6 is characterized in that: The driving mechanism (50) further comprises a guide column (53) for driving the movable rod (34) to reciprocate, a guide groove (531) being provided on the surface of the guide column (53), an annular groove (532) being provided on the movable rod (34), a guide shaft (533) being slidably embedded in the annular groove (532), and a distal end of the guide shaft (533) being embedded in the guide groove (531); When the movable rod (34) drives the annular groove (532) to rotate, the position of the guide shaft (533) remains unchanged under the restriction of the guide groove (531); when the guide column (53) rotates along with the output end of the servo motor (51), the guide shaft (533) drives the movable rod (34) to reciprocate as the position of the guide groove (531) changes.

8. The hollowing detection device for building exterior wall facings according to claim 2 is characterized in that: A rotatable rotating shaft (23) is mounted on the mounting seat (22), and a transmission mechanism (60) for adjusting the position of the mounting seat (22) is arranged on the rotating shaft (23). The transmission mechanism (60) comprises a plurality of first arc-shaped racks (68) slidably mounted on the rotating shaft (23) and a second arc-shaped rack (69) mounted on the adjusting frame (21) and meshing with the first arc-shaped racks (68). When the rotating shaft (23) rotates, the mounting seat (22) is driven to slide along the arc of the adjusting frame (21) through the meshing of the first arc-shaped racks (68) and the second arc-shaped racks (69).

9. The hollowing detection device for building exterior wall facings according to claim 8, characterized in that: The transmission mechanism (60) further comprises a driving wheel (61) sleeved on the output end of the servo motor (51) and two transmission shafts (62) rotatably mounted in the housing (31), wherein the ends of the transmission shafts (62) are rotatably connected to a second bearing seat (66) mounted in the housing (31); A driven wheel (63) and a first bevel gear (65) are sleeved on the transmission shaft (62); a transmission belt (64) is sleeved on the surfaces of the driving wheel (61) and the two driven wheels (63) in meshing engagement; a second bevel gear (67) meshing with the first bevel gear (65) is installed at the end of the rotating shaft (23), so that the servo motor (51) drives the rotating shaft (23) to rotate.

10. The hollowing detection device for building exterior wall facings according to claim 8, characterized in that: The position of the first arc-shaped rack (68) is adjusted by an adjusting mechanism (70), the adjusting mechanism (70) comprising a second slide groove (71) provided on the surface of the rotating shaft (23) and a second slider (73) slidably embedded in the second slide groove (71), a threaded rod (72) is rotatably arranged in the second slide groove (71), the threaded rod (72) passes through the second slider (73) and meshes with the second slider (73), when the threaded rod (72) rotates, the first arc-shaped rack (68) is driven by the second slider (73) to move and release the meshing with the second arc-shaped rack (69).

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