Cantilever mechanism and bridge detection device

Abstract

The application discloses a cantilever mechanism and a bridge detection device with the cantilever mechanism, wherein the cantilever mechanism comprises a cantilever assembly, a telescopic assembly, a first visual detection assembly, a second visual detection assembly, a first transmission structure and a first driving assembly; the telescopic assembly has an elongated state and a shortened state; the telescopic assembly comprises a first sliding base and a second sliding base; the first sliding base is slidably arranged on the cantilever assembly; the second sliding base is slidably arranged on the first sliding base; the first visual detection assembly is arranged on the first sliding base; the second visual detection assembly is arranged on the second sliding base; through the first transmission structure, the first driving assembly can drive the first sliding base and the second sliding base to synchronously slide, so that the telescopic assembly is switched between the elongated state and the shortened state; the first visual detection assembly and the second visual detection assembly can simultaneously detect different positions in the width direction of the bridge, and the detection efficiency of the bridge detection device can be improved.

Description

Technical Field

[0001] This invention relates to the field of road and bridge engineering machinery technology, and in particular to a cantilever mechanism and a bridge inspection device. Background Technology

[0002] In traditional bridge inspection processes, especially for the inspection of the bridge substructure, bridge inspection devices with U-shaped cantilever arms are required to suspend the visual inspection components under the bridge. However, in order to enable the extension and retraction of the visual inspection components, existing cantilever arms can only be configured with one visual inspection component, making it impossible to perform visual inspection on multiple locations of the bridge simultaneously, thus failing to improve the inspection efficiency of the bridge inspection device. Summary of the Invention

[0003] This invention aims to at least solve one of the technical problems existing in the prior art. To this end, this invention proposes a cantilever mechanism that can improve the detection efficiency of bridge inspection devices.

[0004] The present invention also proposes a bridge inspection device having the above-mentioned cantilever mechanism.

[0005] According to a first aspect of the present invention, a cantilever mechanism includes a cantilever assembly, a telescopic assembly, a first vision inspection assembly, a second vision inspection assembly, a first transmission structure, and a first drive assembly. The cantilever assembly is used to connect with a bridge inspection vehicle. The telescopic assembly has an extended state and a shortened state. The telescopic assembly includes a first slide and a second slide. The first slide is slidably disposed on the cantilever assembly, and the second slide is slidably disposed on the first slide. The first vision inspection assembly is disposed on the first slide, and the second vision inspection assembly is disposed on the second slide. The first transmission structure includes a first rack, a second rack, and a first gear. The first rack is disposed on the cantilever assembly, the second rack is disposed on the second slide, and the first gear is rotatably disposed on the first slide. The first rack and the second rack are arranged opposite to each other, and the first gear meshes with both the first rack and the second rack. The first drive assembly is disposed on the cantilever assembly, and the output end of the first drive assembly is connected to the first slide. Through the first transmission structure, the first drive assembly can drive the first slide and the second slide to slide synchronously, so that the telescopic assembly switches between the extended state and the shortened state.

[0006] The cantilever mechanism according to the first aspect of the present invention has at least the following beneficial effects:

[0007] When inspecting a bridge, the telescopic assembly is in its shortened state. The first drive assembly can be activated, allowing it to drive the first slide relative to the cantilever assembly. Since the first gear meshes with both the first and second racks, the first rack drives the first gear to rotate as the first slide slides relative to the cantilever assembly. This, in turn, drives the second rack to move, causing the second slide to slide. Thus, the first and second slides slide synchronously, and the telescopic assembly switches from its shortened to its extended state. The distance between the first and second visual inspection components increases, allowing them to simultaneously inspect different locations along the width of the bridge. After inspection, the first drive assembly can drive the first slide in the opposite direction, switching the telescopic assembly from its extended to its shortened state. This reduces the distance between the first and second visual inspection components, improving the inspection efficiency of the bridge inspection device.

[0008] According to some embodiments of the present invention, the cantilever assembly includes a first cantilever, a lifting rod assembly, and a second cantilever. The fixed end of the lifting rod assembly is connected to the first cantilever, and the movable end of the lifting rod assembly is connected to the second cantilever. The first cantilever is used to connect with the bridge inspection vehicle, and the first slide block is slidably connected to the second cantilever.

[0009] According to some embodiments of the present invention, a first damping component is provided between the first slide and the second cantilever, the first damping component being used to overcome the moving inertia of the first slide.

[0010] According to some embodiments of the present invention, the first damping component includes a first friction member disposed on the second cantilever and a second friction member disposed on the first slide, wherein the first friction member and the second friction member are slidably connected.

[0011] According to some embodiments of the present invention, a first elastic member is provided between the first friction member and the second cantilever, and the first elastic member is used to move the first friction member in a direction closer to the second friction member.

[0012] According to some embodiments of the present invention, a first limiting structure is provided between the first slide and the second cantilever, the first limiting structure being used to limit the length of the first slide extending beyond the second cantilever.

[0013] According to some embodiments of the present invention, the first limiting structure includes a first limiting part disposed on the second cantilever and a second limiting part disposed on the first slide, wherein the telescopic assembly abuts against the first limiting part and the second limiting part when the telescopic assembly is in the extended state.

[0014] According to some embodiments of the present invention, a first guide structure is provided between the first slide and the second cantilever.

[0015] According to some embodiments of the present invention, the first guide structure includes a first guide bar disposed on the first slide and a first guide groove disposed on the second cantilever, wherein the first guide bar is accommodated in the first guide groove.

[0016] The bridge inspection device according to a second aspect of the present invention includes the cantilever mechanism described in the above embodiments.

[0017] The bridge inspection device according to a second aspect embodiment of the present invention has at least the following beneficial effects:

[0018] When inspecting a bridge, the telescopic assembly is in its shortened state. The first drive assembly can be activated, allowing it to drive the first slide relative to the cantilever assembly. Since the first gear meshes with both the first and second racks, the first rack drives the first gear to rotate as the first slide slides relative to the cantilever assembly. This, in turn, drives the second rack to move, causing the second slide to slide. Thus, the first and second slides slide synchronously, and the telescopic assembly switches from its shortened to its extended state. The distance between the first and second visual inspection components increases, allowing them to simultaneously inspect different locations along the width of the bridge. After inspection, the first drive assembly can drive the first slide in the opposite direction, switching the telescopic assembly from its extended to its shortened state. This reduces the distance between the first and second visual inspection components, improving the inspection efficiency of the bridge inspection device.

[0019] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0020] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0021] Figure 1 This is a schematic diagram of the telescopic component in the extended state according to an embodiment of the present invention;

[0022] Figure 2 This is a schematic diagram of the telescopic component in the shortened state according to an embodiment of the present invention;

[0023] Figure 3 This is a schematic diagram of the assembly of the second cantilever and the telescopic component according to an embodiment of the present invention;

[0024] Figure 4 for Figure 3 Top view;

[0025] Figure 5 for Figure 4 Sectional view of line AA in the middle;

[0026] Figure 6 for Figure 5 A magnified view of part B in the middle section;

[0027] Figure 7 is a schematic diagram of the assembly of the first slide and the first gear in an embodiment of the present invention.

[0028] Figure label:

[0029] First cantilever 110, lifting rod assembly 120, first rod 121, second rod 122, second cantilever 130, first receiving groove 131, first limiting part 132, first guide groove 133, telescopic assembly 200, first slide 210, second receiving groove 211, second limiting part 212, first guide bar 213, third limiting part 214, second guide groove 215, second slide 220, fourth limiting part 221, second guide bar 222, first vision detection assembly 310, second vision detection assembly 320, first rack 410, second rack 420, first gear 430, first drive assembly 500, first friction element 610, second friction element 620, first elastic element 630, third friction element 710, fourth friction element 720, second elastic element 730. Detailed Implementation

[0030] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0031] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0032] In the description of this invention, "several" means one or more, "more than" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0033] In the description of this invention, unless otherwise explicitly defined, terms such as "set up," "install," and "connect" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0034] Reference Figure 1 , Figure 2 According to a first aspect of the present invention, a cantilever mechanism includes a cantilever assembly, a telescopic assembly 200, a first vision detection assembly 310, a second vision detection assembly 320, a first transmission structure, and a first drive assembly 500. The cantilever assembly is used to connect with a bridge inspection vehicle. The telescopic assembly 200 has an extended state and a shortened state. The telescopic assembly 200 includes a first slide 210 and a second slide 220. The first slide 210 is slidably disposed on the cantilever assembly, and the second slide 220 is slidably disposed on the first slide 210. The first vision detection assembly 310 is disposed on the first slide 210, and the second vision detection assembly 320 is disposed on the second slide 220. The first transmission structure includes a first rack 410, a second rack 420, and a first gear 430. The first rack 410 is disposed on the cantilever assembly, the second rack 420 is disposed on the second slide 220, and the first gear 430 is rotatably disposed on the first slide 210. The first gear 430 is positioned opposite to the second rack 420, and meshes with the first rack 410 and the second rack 420 respectively. The first drive assembly 500 is located on the cantilever assembly, and the output end of the first drive assembly 500 is connected to the first slide 210. Through the first transmission structure, the first drive assembly 500 can drive the first slide 210 and the second slide 220 to slide synchronously, so that the telescopic assembly 200 switches between the extended state and the shortened state. Thus, by setting the telescopic assembly 200 and the first transmission structure, when inspecting the bridge, as the first slide 210 and the second slide 220 slide synchronously, the distance between the first visual inspection assembly 310 and the second visual inspection assembly 320 can be increased or decreased, so that the first visual inspection assembly 310 and the second visual inspection assembly 320 can simultaneously inspect different positions in the width direction of the bridge, thereby improving the inspection efficiency of the bridge inspection device.

[0035] Specifically, when inspecting the bridge, the telescopic component 200 is in the shortened state. The first drive component 500 can be activated, allowing it to drive the first slide 210 to slide relative to the cantilever component. Since the first gear 430 meshes with the first rack 410 and the second rack 420, when the first slide 210 slides relative to the cantilever component, the first rack 410 drives the first gear 430 to rotate, which in turn drives the second rack 420 to move, thereby causing the second slide 220 to slide. Thus, the first slide 210 and the second slide 220 slide. The telescopic component 200 can slide synchronously, switching from a shortened state to an extended state. The distance between the first visual detection component 310 and the second visual detection component 320 increases, enabling the first visual detection component 310 and the second visual detection component 320 to simultaneously detect different positions in the width direction of the bridge. After the detection is completed, the first drive component 500 can drive the first slide block 210 to move in the opposite direction, so that the telescopic component 200 switches from an extended state to a shortened state, thereby reducing the distance between the first visual detection component 310 and the second visual detection component 320, which can improve the detection efficiency of the bridge detection device.

[0036] It should be noted that there are two configurations of the first transmission structure, namely, two of each of the first rack 410, the second rack 420 and the first gear 430. The two first gears 430 are arranged opposite each other along the width direction of the first slide 210, the two first racks 410 are arranged opposite each other, and the two second racks 420 are arranged opposite each other. This can improve the transmission stability of the first transmission structure, which will not be described in detail here.

[0037] It should be noted that, in some specific embodiments, the telescopic component 200 may also include a third slide block, which is connected to a third vision detection component. The third slide block is slidably disposed on the second slide block 220, and the cantilever mechanism may include a second transmission structure. The second transmission structure includes a third rack, a fourth rack, and a second gear. The third rack is disposed on the first slide block 210, the fourth rack is disposed on the third slide block, and the second gear is rotatably disposed on the second slide block 220. The third rack and the fourth rack are arranged opposite to each other, and the second gear meshes with the third rack and the fourth rack respectively. The second gear is located between the third rack and the fourth rack. Through the second transmission structure, the second slide block 220 and the third slide block can move synchronously. In this way, the first slide block 210, the second slide block 220, and the third slide block can move synchronously to drive the first vision detection component 310, the second vision detection component 320, and the third vision detection component to move synchronously, which can further improve the detection efficiency of the bridge detection device.

[0038] Of course, in some specific embodiments, the telescopic component 200 may also include a fourth slide, a fifth slide, etc., which are not limited here.

[0039] It is understood that the first drive component 500 can be a cylinder, a combination of a motor and a ball screw, or other conventional drive components such as a hydraulic cylinder. Specific implementation methods can be adjusted according to actual needs and are not limited here.

[0040] Reference Figure 1 , Figure 2 In some embodiments of the present invention, the cantilever assembly includes a first cantilever 110, a lifting rod assembly 120, and a second cantilever 130. The fixed end of the lifting rod assembly 120 is connected to the first cantilever 110, and the movable end of the lifting rod assembly 120 is connected to the second cantilever 130. The first cantilever 110 is used to connect with a bridge inspection vehicle. The first slide block 210 is slidably connected to the second cantilever 130, so that the second cantilever 130 can move up and down to be suitable for bridges of different thicknesses, thereby improving the versatility of the cantilever mechanism.

[0041] Specifically, the lifting rod assembly 120 is arranged in the vertical direction. The first cantilever 110, the lifting rod assembly 120, and the second cantilever 130 are in a U-shaped structure. The end of the first cantilever 110 away from the lifting rod assembly 120 can be connected to the bridge inspection vehicle. The lifting rod assembly 120 includes a first rod 121, a second rod 122, and a second drive assembly. The second rod 122 is inserted into the first rod 121 and can move along the axial direction of the first rod 121. The second drive assembly is located on the first rod 121, and the output end of the second drive assembly is connected to the second rod 122 to drive the second rod 122 to move along the axial direction of the first rod 121, so that the second cantilever 130 can move vertically to accommodate bridges of different thicknesses and improve the versatility of the cantilever mechanism.

[0042] It should be noted that the first cantilever 110 is a truss structure, which can not only reduce the overall weight of the cantilever mechanism, but also improve the structural strength of the cantilever mechanism, which will not be described in detail here.

[0043] It is understood that the second drive component can be a cylinder, a combination of a motor and a ball screw, or other conventional drive components such as a hydraulic cylinder. Specific implementation methods can be adjusted according to actual needs and are not limited here.

[0044] Reference Figure 3 , Figure 4 In some embodiments of the present invention, the second cantilever 130 is provided with a first receiving groove 131, the first rack 410 is provided on the side wall of the first receiving groove 131, and the first slide 210 is partially accommodated in the first receiving groove 131. This not only reduces the overall height of the second cantilever 130 and the first slide 210, but also positions the first slide 210 to facilitate assembly of the first slide 210.

[0045] It should be noted that the first slide 210 is provided with a second receiving groove 211, and the second slide 220 is partially housed in the second receiving groove 211, which not only reduces the overall thickness of the telescopic component 200, but also facilitates the assembly of the telescopic component 200.

[0046] Reference Figures 5 to 7 In some embodiments of the present invention, a first damping component is provided between the first slide 210 and the second cantilever 130. The first damping component is used to overcome the moving inertia of the first slide 210, and can prevent the first slide 210 from moving freely, so that the first vision detection component 310 can stay stably at the preset position, thereby improving the detection accuracy of the first vision detection component 310.

[0047] Reference Figures 5 to 7 In some embodiments of the present invention, the first damping component includes a first friction member 610 disposed on the second cantilever 130 and a second friction member 620 disposed on the first slide block 210. The first friction member 610 and the second friction member 620 are slidably connected to overcome the moving inertia of the first slide block 210, thereby preventing the first slide block 210 from moving freely, so that the first visual detection component 310 can be stably stopped at a preset position, thereby improving the detection accuracy of the first visual detection component 310.

[0048] Specifically, the first friction member 610 is arranged along the length direction of the second cantilever 130, and the second friction member 620 is arranged on one side of the width direction of the first slide block 210 and extends along the length direction of the first slide block 210. The second friction member 620 can slide on the first friction member 610 to generate frictional resistance that restricts the movement of the first slide block 210, thereby overcoming the movement inertia of the first slide block 210 and preventing the first slide block 210 from moving freely. This allows the first vision detection component 310 to stay stably in the preset position and improves the detection accuracy of the first vision detection component 310.

[0049] Of course, in some specific embodiments, the first damping component can also be a first magnetic attractor provided on the second cantilever 130 and a second magnetic attractor provided on the first slide block 210. The first magnetic attractor and the second magnetic attractor are arranged opposite to each other, and the first magnetic attractor and the second magnetic attractor have opposite magnetic properties. The first magnetic attractor can attract the second magnetic attractor, so that the second cantilever 130 can attract the first slide block 210 through the first damping component, and can also overcome the moving inertia of the first slide block 210. This will not be described in detail here.

[0050] Reference Figures 5 to 7In some embodiments of the present invention, a second damping component is provided between the first slide 210 and the second slide 220. The second damping component is used to overcome the moving inertia of the second slide 220, and can prevent the second slide 220 from moving freely, so that the second vision detection component 320 can stay stably at the preset position, thereby improving the detection accuracy of the second vision detection component 320.

[0051] Specifically, the second damping component includes a third friction member 710 disposed on the first slide 210 and a fourth friction member 720 disposed on the second slide 220. The third friction member 710 is disposed along the length direction of the first slide 210, and the fourth friction member 720 is disposed on one side of the width direction of the second slide 220 and extends along the length direction of the second slide 220. The third friction member 710 and the fourth friction member 720 are slidably connected to overcome the moving inertia of the second slide 220, thereby preventing the second slide 220 from moving freely. This allows the second vision detection component 320 to remain stably in a preset position, thereby improving the detection accuracy of the second vision detection component 320.

[0052] Reference Figures 5 to 7 In some embodiments of the present invention, a first elastic member 630 is provided between the first friction member 610 and the second cantilever 130. The first elastic member 630 is used to move the first friction member 610 in a direction close to the second friction member 620 so that the first friction member 610 can stably contact the second friction member 620, thereby ensuring that the first damping assembly can stably overcome the moving inertia of the first slide block 210.

[0053] Specifically, the first friction member 610 is connected to the second cantilever 130 via a first fastener, and the first friction member 610 can move axially along the first fastener. One end of the first elastic member 630 is connected to the second cantilever 130, and the other end of the first elastic member 630 is connected to the first friction member 610, so that the first friction member 610 moves in a direction close to the second friction member 620, so that the first friction member 610 can contact the second friction member 620, thereby ensuring that the first damping assembly can stably overcome the moving inertia of the first slide block 210.

[0054] It should be noted that the first fastener can be a bolt or screw, etc., and there are no restrictions on its use.

[0055] It is understood that there are multiple first elastic elements 630, and the multiple first elastic elements 630 are spaced apart along the length direction of the first friction element 610, which will not be described in detail here.

[0056] It should be noted that the first elastic element 630 is a compression spring or a rubber component capable of axial elastic deformation, which can drive the first friction element 610 to move in a direction close to the second friction element 620. It will not be described in detail here.

[0057] In some embodiments of the present invention, a second elastic member 730 is provided between the third friction member 710 and the first slide block 210. The second elastic member 730 is used to move the third friction member 710 in a direction close to the fourth friction member 720 so that the third friction member 710 can stably contact the fourth friction member 720, thereby ensuring that the second damping assembly can stably overcome the moving inertia of the second slide block 220.

[0058] Specifically, the third friction member 710 is connected to the first slide block 210 via the second fastener, and the third friction member can move along the axial direction of the second fastener. One end of the second elastic member 730 is connected to the first slide block 210, and the other end of the second elastic member 730 is connected to the third friction member 710, so that the third friction member 710 moves in a direction close to the fourth friction member 720, so that the third friction member 710 can contact the fourth friction member 720, thereby ensuring that the second damping assembly can stably overcome the moving inertia of the second slide block 220.

[0059] It should be noted that the second fastener can be a bolt or screw, etc., and there are no restrictions on its use.

[0060] It is understood that there are multiple second elastic elements 730, and multiple first elastic elements 630 are spaced apart along the length direction of the first friction element 610, which will not be described in detail here.

[0061] It should be noted that the second elastic element 730 is a compression spring or a rubber component capable of axial elastic deformation, which can drive the third friction element 710 to move in a direction close to the fourth friction element 720. It will not be described in detail here.

[0062] Reference Figure 3 , Figure 7 In some embodiments of the present invention, a first limiting structure is provided between the first slide block 210 and the second cantilever 130. The first limiting structure is used to limit the length of the first slide block 210 extending beyond the second cantilever 130, which can ensure the maximum extension length of the first slide block 210, so as to avoid the separation of the first slide block 210 and the second cantilever 130, thereby improving the reliability of the cantilever mechanism.

[0063] In some embodiments of the present invention, the first limiting structure includes a first limiting part 132 disposed on the second cantilever 130 and a second limiting part 212 disposed on the first slide block 210. When the telescopic assembly 200 is in the extended state, the first limiting part 132 abuts against the second limiting part 212, which can ensure the maximum extension length of the first slide block 210, so as to avoid the first slide block 210 from separating from the second cantilever 130, thereby improving the reliability of the cantilever mechanism.

[0064] Specifically, the first limiting part 132 is located at the end of the second cantilever 130 away from the lifting rod assembly 120, and the second limiting part 212 is located at the end of the first slide block 210 close to the lifting rod assembly 120. When the telescopic assembly 200 switches to the extended state, the first limiting part 132 and the second limiting part 212 abut against each other to limit the first slide block 210 from continuing to move in the direction of extending the second cantilever 130. This ensures the maximum extension length of the first slide block 210 and prevents the first slide block 210 from separating from the second cantilever 130, thereby improving the reliability of the cantilever mechanism.

[0065] It is understandable that when the telescopic component 200 is in the shortened state, the first limiting part 132 and the second limiting part 212 separate, which will not be described in detail here.

[0066] It should be noted that the first limiting structure can also be a structure in which the limiting shaft and the limiting hole cooperate. The limiting hole is located in the second cantilever 130 and the limiting hole is a waist-shaped structure. The limiting shaft is located in the first slide 210. The limiting shaft passes through the limiting hole and can abut against the side of the limiting hole away from the lifting rod assembly 120. It can also limit the first slide 210 from continuing to move in the direction extending from the second cantilever 130. This will not be described in detail here.

[0067] In some embodiments of the present invention, a second limiting structure is provided between the first slide 210 and the second slide 220. The second limiting structure is used to limit the length of the second slide 220 extending beyond the first slide 210, which can ensure the maximum extension length of the second slide 220, so as to avoid the separation of the first slide 210 and the second slide 220, thereby improving the reliability of the cantilever mechanism.

[0068] Specifically, the first limiting structure includes a third limiting part 214 disposed on the first slide 210 and a fourth limiting part 221 disposed on the second slide 220. The third limiting part 214 is disposed at the end of the first slide 210 away from the lifting rod assembly 120, and the fourth limiting part 221 is disposed at the end of the second slide 220 close to the lifting rod assembly 120. When the telescopic assembly 200 is in the extended state, the third limiting part 214 and the fourth limiting part 221 abut against each other to limit the first slide 210 from continuing to move in the direction of extending the second cantilever 130. This ensures the maximum extension length of the second slide 220 and prevents the first slide 210 from separating from the second slide 220, thereby improving the reliability of the cantilever mechanism.

[0069] It is understandable that when the telescopic component 200 is in the shortened state, the third limiting part 214 and the fourth limiting part 221 separate, which will not be described in detail here.

[0070] Reference Figure 5 In some embodiments of the present invention, a first guide structure is provided between the first slide block 210 and the second cantilever 130, which can guide the first slide block 210 so that the first slide block 210 moves in a preset direction, thereby improving the movement stability of the first slide block 210.

[0071] In some embodiments of the present invention, the first guide structure includes a first guide bar 213 disposed on the first slide 210 and a first guide groove 133 disposed on the second cantilever 130. The first guide bar 213 is accommodated in the first guide groove 133 and can guide the first slide 210 so that the first slide 210 moves in a preset direction, thereby improving the movement stability of the first slide 210.

[0072] Specifically, the first guide bar 213 is housed in the first guide groove 133 and can be connected to the side wall of the first guide groove 133, so as to guide the first slide block 210 to move in a preset direction, thereby improving the movement stability of the first slide block 210.

[0073] It should be noted that the first guide structure can also be a structure in which the guide shaft and the guide hole cooperate. The guide hole is located in the second cantilever 130 and the guide hole is a waist-shaped structure. The guide shaft is located in the first slide 210. The guide shaft passes through the guide hole and is connected to the side wall of the guide hole, which can also guide the first slide 210. This will not be described in detail here.

[0074] Reference Figure 5 In some embodiments of the present invention, a second guide structure is provided between the first slide 210 and the second slide 220, which can guide the second slide 220 so that the second slide 220 moves in a preset direction, thereby improving the movement stability of the second slide 220.

[0075] Specifically, the second guide structure includes a second guide bar 222 disposed on the second slide 220 and a second guide groove 215 disposed on the first slide 210. The second guide bar 222 is accommodated in the second guide groove 215 and can guide the second slide 220 so that the first slide 210 moves in a preset direction, thereby improving the movement stability of the first slide 210.

[0076] Reference Figure 1 , Figure 2 According to a second aspect of the present invention, a bridge inspection device includes a bridge inspection vehicle and a cantilever mechanism according to a first aspect of the present invention. The bridge inspection vehicle is connected to the cantilever assembly. By setting a telescopic assembly 200 and a first transmission structure, when inspecting the bridge, as the first slide 210 and the second slide 220 slide synchronously, the distance between the first visual inspection assembly 310 and the second visual inspection assembly 320 can be increased or decreased, so that the first visual inspection assembly 310 and the second visual inspection assembly 320 can simultaneously inspect different positions of the bridge in the width direction, thereby improving the inspection efficiency of the bridge inspection device.

[0077] Specifically, when inspecting the bridge, the telescopic component 200 is in the shortened state. The first drive component 500 can be activated, allowing it to drive the first slide 210 to slide relative to the cantilever component. Since the first gear 430 meshes with the first rack 410 and the second rack 420, when the first slide 210 slides relative to the cantilever component, the first rack 410 drives the first gear 430 to rotate, which in turn drives the second rack 420 to move, thereby causing the second slide 220 to slide. Thus, the first slide 210 and the second slide 220 slide. The telescopic component 200 can slide synchronously, switching from a shortened state to an extended state. The distance between the first visual detection component 310 and the second visual detection component 320 increases, enabling the first visual detection component 310 and the second visual detection component 320 to simultaneously detect different positions in the width direction of the bridge. After the detection is completed, the first drive component 500 can drive the first slide block 210 to move in the opposite direction, so that the telescopic component 200 switches from an extended state to a shortened state, thereby reducing the distance between the first visual detection component 310 and the second visual detection component 320, which can improve the detection efficiency of the bridge detection device.

[0078] It should be noted that the first visual detection component 310 and the second visual detection component 320 can be components such as cameras or webcams, and there are no restrictions on this.

[0079] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0080] The present invention has been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the invention.

Claims

1. A cantilever mechanism, characterized in that, include: Cantilever assembly for connection to the bridge inspection vehicle; The telescopic assembly (200) has an extended state and a shortened state. The telescopic assembly (200) includes a first slide (210) and a second slide (220). The first slide (210) is slidably disposed on the cantilever assembly, and the second slide (220) is slidably disposed on the first slide (210). The first vision detection component (310) is disposed on the first slide (210). The second vision detection component (320) is disposed on the second slide (220); The first transmission structure includes a first rack (410), a second rack (420), and a first gear (430). The first rack (410) is disposed on the cantilever assembly, the second rack (420) is disposed on the second slide (220), and the first gear (430) is rotatably disposed on the first slide (210). The first rack (410) and the second rack (420) are disposed opposite to each other, and the first gear (430) meshes with the first rack (410) and the second rack (420) respectively. A first drive assembly (500) is disposed on the cantilever assembly. The output end of the first drive assembly (500) is connected to the first slide (210). Through the first transmission structure, the first drive assembly (500) can drive the first slide (210) and the second slide (220) to slide synchronously, so that the telescopic assembly (200) switches between the extended state and the shortened state. The cantilever assembly includes a first cantilever (110), a lifting rod assembly (120), and a second cantilever (130). The fixed end of the lifting rod assembly (120) is connected to the first cantilever (110). The movable end of the assembly (120) is connected to the second cantilever (130). The first cantilever (110) is used to connect with the bridge inspection vehicle. The first slide (210) is slidably connected to the second cantilever (130). A first damping assembly is provided between the first slide (210) and the second cantilever (130). The first damping assembly is used to overcome the moving inertia of the first slide (210). The first damping assembly includes a first friction element (610) provided on the second cantilever (130) and a second friction element (620) provided on the first slide (210). The first friction element (610) is connected to the second cantilever (130) and the second cantilever (130). The second friction element (620) is slidably connected. A first elastic element (630) is provided between the first friction element (610) and the second cantilever (130). The first elastic element (630) is used to move the first friction element (610) in a direction close to the second friction element (620). A second damping assembly is provided between the first slide (210) and the second slide (220). The second damping assembly is used to overcome the moving inertia of the second slide (220). The second damping assembly includes a third friction element (710) provided on the first slide (210) and a third friction element (710) provided on the second slide (220). Four friction elements (720), the third friction element (710) is arranged along the length direction of the first slide block 210, the fourth friction element (720) is arranged on one side of the width direction of the second slide block (220) and extends along the length direction of the second slide block (220), the third friction element (710) and the fourth friction element (720) are slidably connected, and a second elastic element (730) is provided between the third friction element (710) and the first slide block (210), the second elastic element (730) is used to move the third friction element (710) in a direction close to the fourth friction element (720).

2. The cantilever mechanism according to claim 1, characterized in that, A first limiting structure is provided between the first slide (210) and the second cantilever (130), and the first limiting structure is used to limit the length of the first slide (210) extending out of the second cantilever (130).

3. The cantilever mechanism according to claim 2, characterized in that, The first limiting structure includes a first limiting part (132) provided on the second cantilever (130) and a second limiting part (212) provided on the first slide (210). When the telescopic assembly (200) is in the extended state, the first limiting part (132) abuts against the second limiting part (212).

4. The cantilever mechanism according to claim 1, characterized in that, A first guide structure is provided between the first slide (210) and the second cantilever (130).

5. The cantilever mechanism according to claim 4, characterized in that, The first guide structure includes a first guide bar (213) disposed on the first slide (210) and a first guide groove (133) disposed on the second cantilever (130), wherein the first guide bar (213) is accommodated in the first guide groove (133).

6. A bridge inspection device, characterized in that, It includes a bridge inspection vehicle and a cantilever mechanism as described in any one of claims 1 to 5, wherein the bridge inspection vehicle is connected to the cantilever assembly.

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