Visual inspection cradle head for defects of beam crane

Abstract

The invention relates to the field of crane detection equipment, and particularly discloses a beam crane defect visual inspection cradle head which comprises a hanging frame, a sliding sleeve, a first telescopic arm, a second telescopic arm, a synchronous assembly, a two-axis camera shooting cradle head assembly, a hanging part and a first counterweight part, the device is hung in a lifting hook of a crane through the hanging frame, after the device is lifted, the trolley slowly advances along a main beam guide rail, the area below a main beam, the operation condition of an electric hoist and the operation condition of the trolley can be observed through the two-axis camera shooting pan-tilt assembly, and the side face of a supporting leg can be observed through the lifting action of a steel wire rope; manual climbing operation is not needed, the detection difficulty is reduced, the observation range and angle of the camera can be increased through stretching and retracting of the first telescopic arm and the second telescopic arm, the working safety and efficiency can be improved, and the accuracy and comprehensiveness of structure and operation detection can be improved.

Description

Technical Field

[0001] This invention belongs to the field of crane inspection equipment, and specifically relates to a visual inspection platform for defects in beam cranes. Background Technology

[0002] In high-risk scenarios such as industrial production and construction, cranes are subjected to heavy loads, vibrations, and complex environmental conditions over long periods. Problems such as metal structural fatigue, component wear, and electrical system aging gradually accumulate. If not inspected promptly, minor defects can escalate into major accidents, such as hook breakage, wire rope breakage, brake failure, or even complete crane overturning, directly threatening personnel and property safety. Therefore, regular inspections of multiple indicators, including the metal support structure, hoisting mechanism, and operational status, are necessary when using cranes.

[0003] When inspecting the main load-bearing components such as the main beam, end beams, outriggers, and frame for cracks, deformation, or corrosion, as well as checking the operation of components and mechanisms such as wear on the treads and flanges of the trolley and traveling wheels and rail wear, inspectors usually need to climb onto the inspection cage or the inspection aisle of the main beam to visually inspect the structure and operation of the crane. However, the operation of the area under the main beam, the sides of the outriggers, the electric hoist, and the traveling mechanism often cannot be directly observed and judged by close-range visual inspection. In particular, large lifting equipment is more likely to have large blind spots for inspection, which not only increases the difficulty of inspection and reduces the efficiency of inspection, but also makes it difficult to guarantee the personal safety of inspectors, and reduces the accuracy and comprehensiveness of the inspection results.

[0004] A handheld crane beam damage inspection device is disclosed in patent document application number "CN202022978709.2". Although the inspection device in this prior art can appropriately increase the visual working range of the operator and improve the observation flexibility to a certain extent by setting up a telescopic rod and a gimbal that can rotate around the end of the telescopic rod, it cannot avoid the need for people to climb onto structural components such as the main beam. Furthermore, it still cannot detect the bottom welding position of the main beam of large lifting equipment, the electric hoist, and the side of the outriggers, which still poses a significant safety risk and has limited detection capabilities.

[0005] The above background information is provided only to aid in understanding the inventive concept and technical solution of this invention. It does not necessarily belong to the prior art of this patent application. In the absence of clear evidence that the above information was disclosed on the filing date of this patent application, the above background information should not be used to evaluate the novelty and inventiveness of this application. Summary of the Invention

[0006] The purpose of this invention is to provide a visual inspection platform for defects in beam cranes, thereby overcoming the shortcomings of manual inspection of the structure and operation of cranes, such as high inspection difficulty, low efficiency, poor safety, and low accuracy and comprehensiveness.

[0007] To achieve the above objectives, the present invention provides a visual inspection pan-tilt unit for defects in a beam crane, comprising: a bracket, wherein the bracket is provided with a sliding sleeve, and a sliding channel is provided through the two opposite ends of the sliding sleeve; a first telescopic arm and a second telescopic arm are sleeved within the sliding channel; a synchronous drive component is installed between the sliding sleeve and the first telescopic arm and the second telescopic arm; the synchronous drive component is capable of driving one end of the first telescopic arm and one end of the second telescopic arm to synchronously extend and retract outward from the end of the sliding sleeve; a two-axis camera pan-tilt unit assembly is respectively installed at one end of the first telescopic arm and one end of the second telescopic arm; a suspension part is provided at the top of the bracket; and a first counterweight part is provided at the bottom of the bracket.

[0008] Preferably, in the above technical solution, the suspension part includes two side plates. The bottom of the side plates is welded to the bracket. A suspension column is welded between the opposite sides of the two side plates. The axis of the suspension column is horizontally arranged and is consistent with the direction of the sliding channel.

[0009] Preferably, in the above technical solution, the suspension column is fitted with two clamping plates, the surface of which is perpendicular to the axis of the suspension column, and the clamping plates can slide along the suspension column; several guide rods are provided on the opposite side of the two clamping plates, and a guide sleeve matching the guide rod is provided on the side plate, the guide rod being slidably inserted into the guide sleeve; a first nut is welded to the side plate, and a tightening bolt is provided inside the first nut, the end of which abuts against the side of the clamping plate, and when the tightening bolt is tightened, the two clamping plates can be driven to move closer to each other.

[0010] Preferably, in the above technical solution, the first counterweight part includes a first pad and a second pad. The top surface of the first pad is welded to the bottom of the bracket. A plurality of through-nails are provided through the top and bottom surfaces of the first pad. A first stud is provided on the top surface of the second pad. The end of the first stud passes through the through-nails from the bottom surface of the first pad and is locked by a second nut. A plurality of first counterweights are sleeved on the first stud. The first counterweights are sandwiched between the first pad and the second pad.

[0011] Preferably, in the above technical solution, the synchronous drive component includes a drive motor, a first synchronous pulley, a second synchronous pulley, a first synchronous belt, a second synchronous belt, a first connecting seat, a second connecting seat, and a wheel seat; the number of wheel seats, the number of the first synchronous pulley, and the number of the second synchronous pulley are all two. The two wheel seats are fixedly installed near the two ends of the sliding sleeve. The drive motor is fixedly installed on one of the wheel seats. One first synchronous pulley and one second synchronous pulley are coaxially installed on the output shaft of the drive motor. The other first synchronous pulley and the other second synchronous pulley are coaxially installed on the other wheel seat. The first synchronous belt is fitted between the two first synchronous pulleys and connected to the first telescopic arm through the first connecting seat. The second synchronous belt is fitted between the two second synchronous pulleys and connected to the second telescopic arm through the second connecting seat. The first connecting seat and the second connecting seat are aligned. The drive motor can drive the first synchronous belt and the second synchronous belt to move synchronously.

[0012] Preferably, in the above technical solution, a second counterweight is installed on another wheel seat, the weight of the second counterweight being the same as the weight of the drive motor; the second counterweight includes a third pad, a fourth pad, a second counterweight block, and a third nut, the third pad is fixedly connected to the wheel seat, a second stud is provided on the third pad, the second counterweight block and the fourth pad are sleeved on the second stud and the second counterweight block is located between the third pad and the fourth pad, and the third nut is installed on the second stud and presses the fourth pad tightly.

[0013] Preferably, in the above technical solution, a first clearance groove is formed in the middle of the first telescopic arm, and a first clearance opening is formed at the other end of the first telescopic arm, which communicates with the end of the first clearance groove; a second clearance groove is formed in the middle of the second telescopic arm, and a second clearance opening is formed at the other end of the first telescopic arm, which communicates with the end of the second clearance groove; the first synchronous belt can pass through the first clearance groove and the first clearance opening, and the second synchronous belt can pass through the second clearance groove and the second clearance opening.

[0014] Preferably, in the above technical solution, the bottom of the first telescopic arm is provided with a first misalignment opening, one side of the first misalignment opening extends outward from the other end of the first telescopic arm, and the top of the second telescopic arm is provided with a second misalignment opening, one side of the second misalignment opening extends outward from the other end of the second telescopic arm. When the first telescopic arm and the second telescopic arm slide into the sliding sleeve, the first misalignment opening and the second misalignment opening can be engaged with each other.

[0015] Preferably, in the above technical solution, the first telescopic arm has a first limiting groove on both sides, the second telescopic arm has a second limiting groove on both sides, and the sliding sleeve is equipped with a first limiting pin that matches the first limiting groove and a second limiting pin that matches the second limiting groove on both sides.

[0016] Preferably, in the above technical solution, the two-axis camera gimbal assembly includes a base plate, a transparent cover, a two-axis movable arm assembly, and a camera assembly. The base plate is fixedly mounted on the first telescopic arm and the second telescopic arm. The two-axis movable arm assembly includes a first joint motor, a first curved arm, a second joint motor, and a second curved arm. The first joint motor is fixedly mounted to the base plate, and the rotation axis of its output shaft is vertical. The bottom of the first curved arm is fixedly connected to the output shaft of the first joint motor. One side of the first curved arm has an upwardly extending first connecting portion, and a clearance area is provided above the first curved arm. The second joint motor is fixedly connected to the first connecting portion, and the rotation axis of its output shaft is horizontal. One side of the second curved arm is fixedly connected to the output shaft of the second joint motor. The camera assembly is fixedly mounted at the bottom of the second curved arm and located within the clearance area. The transparent cover is a hemispherical structure and is detachably mounted to the base plate. The two-axis movable arm assembly and the camera assembly are located inside the transparent cover.

[0017] Compared with existing technologies, the present invention has the following advantages: 1. The visual inspection pan-tilt unit for beam crane defects in this invention is suspended in the crane's hook by a bracket. After it is lifted, it moves slowly along the main beam guide rail via a trolley. The two-axis camera pan-tilt unit can then observe the area below the main beam, the electric hoist, and the operation of the trolley. The side of the outriggers can be observed by the lifting and lowering of the wire rope, eliminating the need for manual climbing and reducing the difficulty of inspection. Furthermore, the extension and retraction of the first and second telescopic arms can increase the observation range and angle of the camera, improving both work safety and efficiency, as well as the accuracy and comprehensiveness of structural and operational inspections.

[0018] 2. The first telescopic arm and the second telescopic arm in this invention are driven by a synchronous drive component and can extend and retract synchronously to both sides of the hanger, so that the whole can always maintain balance and prevent tilting; and a first counterweight is also installed at the bottom of the hanger, which can improve the stability and anti-interference of the device in the vertical direction when the hook lifts the hanger.

[0019] 3. The suspension part in this invention is provided with clamping plates. When the hook hooks the suspension column, the two clamping plates can clamp the two sides of the hook by tightening the top bolt. The axis of the suspension column is consistent with the direction of the sliding channel. The above structure can avoid relative slippage between the suspension column and the hook when the first telescopic arm and the second telescopic arm are subjected to uneven forces, and avoid the two ends of the sliding sleeve from being tilted in height.

[0020] 4. In the synchronous drive unit of the present invention, a drive motor is mounted on one of the wheel seats, and a second counterweight is mounted on the other wheel seat. The weight of the second counterweight is the same as the weight of the drive motor, and the two are symmetrically arranged around the center of the sliding sleeve, thereby eliminating the influence of the weight of the drive motor on the overall balance.

[0021] 5. In this invention, the first telescopic arm has a first clearance groove and a first clearance opening in its middle portion, and the second telescopic arm has a second clearance groove and a second clearance opening in its middle portion, thereby forming a U-shaped clearance structure at the ends of the first and second telescopic arms, which can make way for the first synchronous belt and the first synchronous pulley, as well as the second synchronous belt and the second synchronous pulley; and the setting of the first and second clearance openings enables the first and second telescopic arms to engage with each other during synchronous retraction, thereby giving the first and second telescopic arms a larger range of telescopic movement.

[0022] 6. The first limiting groove and the first limiting pin, as well as the second limiting groove and the second limiting pin in this invention, can not only provide support and positioning when the ends of the first telescopic arm and the second telescopic arm extend, but also limit the extreme positions of the extension and retraction of the first telescopic arm and the second telescopic arm.

[0023] 7. The two-axis gimbal assembly of the present invention is provided with a transparent cover, which can protect the two-axis movable arm assembly and the camera assembly. Furthermore, both the first and second curved arms are L-shaped structures, and a clearance area is provided at the top of the first curved arm. The camera assembly and the second curved arm are both located within the clearance area, which makes the structure of the camera assembly and the two-axis curved arm assembly more compact and saves installation space. Attached Figure Description

[0024] Figure 1 This is a structural diagram of the defect visual inspection platform for the beam crane of the present invention.

[0025] Figure 2 This is a structural diagram of the suspension section.

[0026] Figure 3 It is the structure of the first counterweight section.

[0027] Figure 4 It is a partial sectional view of the sliding sleeve, the first telescopic arm, the second telescopic arm, and the synchronization assembly.

[0028] Figure 5 This is a structural diagram of the synchronization component.

[0029] Figure 6 This is a structural diagram of the sliding sleeve.

[0030] Figure 7 This is an assembly diagram of the first and second telescopic arms in their retracted states and the synchronization components.

[0031] Figure 8 This is a structural diagram of the first telescopic arm.

[0032] Figure 9 This is a structural diagram of the second telescopic arm.

[0033] Figure 10 This is a partial cross-sectional view of a two-axis camera gimbal assembly.

[0034] Figure 11 This is a structural diagram of the visual inspection platform for defects on a beam crane, used in conjunction with the hook.

[0035] Explanation of key figure labels: 100 - Hanger, 110 - Sliding sleeve, 120 - Sliding channel; 200 - First telescopic arm, 210 - First clearance groove, 220 - First clearance opening, 230 - First misalignment opening, 240 - First limiting groove, 250 - First limiting pin; 300 - Second telescopic arm, 310 - Second clearance groove, 320 - Second clearance opening, 330 - Second misalignment opening, 340 - Second limit groove, 350 - Second limit pin; 400-Synchronous drive component, 410-Drive motor, 420-First synchronous pulley, 430-Second synchronous pulley, 440-First synchronous belt, 450-Second synchronous belt, 460-First connecting seat, 470-Second connecting seat, 480-Pulley seat; 500-Two-axis camera gimbal assembly, 510-Base plate, 520-Transparent cover, 530-Camera assembly, 540-First joint motor, 550-First curved arm, 551-First connecting part, 560-Second joint motor, 570-Second curved arm, 580-Giveaway area; 600-Suspension part, 610-Side plate, 620-Suspension column, 630-Clamping plate, 640-Guide rod, 650-Guide sleeve, 660-First nut, 670-Tightening bolt; 700-First counterweight, 710-First pad, 720-Second pad, 730-Through hole, 740-First stud, 750-Second nut, 760-First counterweight block; 800 - Second counterweight, 810 - Third pad, 820 - Fourth pad, 830 - Second counterweight block, 840 - Third nut, 850 - Second stud; 900-Hook. Detailed Implementation

[0036] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0037] like Figure 1 and Figure 11 As shown, the visual inspection platform for defects of the beam crane in this embodiment includes: a bracket 100, a sliding sleeve 110, a first telescopic boom 200, and a second telescopic boom 300; the sliding sleeve 110 passes horizontally through the bracket 100 and is fixedly welded to it; a suspension part 600 is provided at the top of the bracket 100, and a first counterweight part 700 is provided at the bottom of the bracket 100; a sliding channel 120 is provided through the two opposite ends of the sliding sleeve 110, and the first telescopic boom 200 and the second telescopic boom 300 are fitted inside the sliding channel 120; a synchronous drive component 400 is installed between the sliding sleeve 110 and the first telescopic boom 200 and the second telescopic boom 300, and the synchronous drive component 400 can drive the first telescopic boom 200. One end of the first telescopic arm 200 and one end of the second telescopic arm 300 extend and retract synchronously outward from the end of the sliding sleeve 110. Two-axis camera pan-tilt unit 500 is installed at one end of the first telescopic arm 200 and one end of the second telescopic arm 300 respectively. In use, it is suspended on the suspension part 600 by the hook 900. The first counterweight part 700 lowers the hanger 100 to a vertical state and the sliding sleeve 110 to a horizontal state. The ends of the first telescopic arm 200 and the second telescopic arm 300 can extend and retract outward, thereby driving the two sets of two-axis camera pan-tilt unit 500 to move outward or inward synchronously. The hook 900 can drive the hanger 100 to move up and down by the electric hoist or move along the main beam guide rail of the crane by the trolley.

[0038] More in detail, such as Figure 2As shown, the suspension unit 600 includes two side plates 610, which are arranged parallel to each other in a vertical direction. The bottom of the side plates 610 is welded to the bracket 100. A suspension column 620 is welded between the opposite sides of the two side plates 610. The axis of the suspension column 620 is horizontal and aligned with the direction of the sliding channel 120. Two clamping plates 630 are fitted onto the suspension column 620. The surface of the clamping plates 630 is perpendicular to the axis of the suspension column 620, and the clamping plates 630 can slide along the suspension column 620. Two guide rods 640 are welded to the opposite sides of the two clamping plates 630. The guide rods 640 are perpendicular to the clamping plates 630. Two guide sleeves 650 that match the guide rods 640 are welded onto the side plates 610. The sleeve holes of the guide sleeves 650 pass through the two sides of the side plates 610. The guide rod 640 is slidably inserted into the guide sleeve 650. Two first nuts 660 are welded to the outside of the side plate 610 and through holes corresponding to the holes of the first nuts 660 are provided. A tightening bolt 670 is installed in each first nut 660. The end of the tightening bolt 670 passes through the through hole and abuts against the side of the clamping plate 630. When the hook 900 hooks the suspension column 620, the two clamping plates 630 can be driven to move closer to each other by tightening the tightening bolt 670, clamping the two sides of the hook 900. The above structure can prevent relative slippage between the suspension column 620 and the hook 900 when the first telescopic arm 200 and the second telescopic arm 300 are subjected to uneven forces, and prevent the two ends of the sliding sleeve 110 from being tilted in height.

[0039] More in detail, such as Figure 3As shown, the first counterweight 700 includes a first pad 710 and a second pad 720. The top surface of the first pad 710 is welded to the bottom of the bracket 100. Four through holes 730 are provided through the top and bottom surfaces of the first pad 710, and the positions of the four through holes 730 are symmetrical about the center of the first pad 710. Four first studs 740 are welded to the top surface of the second pad 720. The positions of the first studs 740 correspond to the positions of the through holes 730. The ends of the first studs 740 pass through the through holes 730 from the bottom surface of the first pad 710 and are locked by second nuts 750. Multiple first counterweight blocks 760 are fitted on the first studs 740 and are sandwiched between the first pad 710 and the second pad 720. A second counterweight 800 is installed on another wheel seat 480. The weight of the second counterweight 800 is the same as the weight of the drive motor 410. The second counterweight 800 includes a third pad 810, a fourth pad 820, a second counterweight block 830, and a third nut 840. The third pad 810 is fixedly connected to the wheel seat 480. A second stud 850 is welded onto the third pad 810. The second stud 850 is perpendicular to the surface of the third pad 810. Multiple second counterweight blocks 830 are stacked on top of each other and simultaneously fitted onto the second stud 850 along with the fourth pad 820. The second counterweight blocks 830 are located between the third pad 810 and the fourth pad 820. The third nut 840 is installed on the second stud 850 and can press the fourth pad 820 tightly. When the hook 900 lifts the bracket 100, the first counterweight 700 can improve the stability and anti-interference of the device in the vertical direction.

[0040] More in detail, such as Figure 4 and Figure 5As shown, the synchronous drive component 400 includes a drive motor 410, a first synchronous pulley 420, a second synchronous pulley 430, a first synchronous belt 440, a second synchronous belt 450, a first connecting seat 460, a second connecting seat 470, and a wheel seat 480. There are two wheel seats 480, two first synchronous pulleys 420, and two second synchronous pulleys 430. The two wheel seats 480 are fixedly installed near both ends of the sliding sleeve 110, and their installation positions are symmetrically distributed around the center of the sliding sleeve 110. The drive motor 410 is fixedly installed on one of the wheel seats 480. One first synchronous pulley 420 and one second synchronous pulley 430 are coaxially installed on the output shaft of the drive motor 410. Another first synchronous pulley 420 and another second synchronous pulley 430 are coaxially installed on the other wheel seat 480. The first synchronous belt 440 is fitted between the two first synchronous pulleys 420 and passes through the first synchronous belt 450. A connecting seat 460 is connected to the first telescopic arm 200. A second synchronous belt 450 is fitted between two second synchronous pulleys 430 and connected to the second telescopic arm 300 through a second connecting seat 470. The first connecting seat 460 and the second connecting seat 470 are aligned with the center point of the sliding sleeve 110. The drive motor 410 can drive the first synchronous belt 440 and the second synchronous belt 450 to move synchronously. When the first synchronous belt 440 and the second synchronous belt 450 are in motion, the first connecting seat 460 and the second connecting seat 470 can move closer to each other or further away from each other at the same speed, thereby driving the first telescopic arm 200 and the second telescopic arm 300 to extend outward or retract inward synchronously at the same speed. The first telescopic arm 200 and the second telescopic arm 300 are driven by the synchronous drive member 400 and can extend and retract synchronously to both sides of the bracket 100, so that the whole can always maintain balance and prevent tilting.

[0041] like Figures 6 to 9As shown, a first receptive groove 210 is formed in the middle of the first telescopic arm 200, and a first receptive opening 220 is formed at the other end of the first telescopic arm 200, which is connected to the end of the first receptive groove 210, making the first receptive groove 210 a C-shaped structure; a second receptive groove 310 is formed in the middle of the second telescopic arm 300, and a second receptive opening 320 is formed at the other end of the first telescopic arm 200, which is connected to the end of the second receptive groove 310, making the second receptive groove 310 a C-shaped structure; a first synchronous belt 440 can pass through the first receptive groove 210 and the first receptive opening 220, and a second synchronous belt 450 can pass through the second receptive groove 310 and the second receptive opening 320; a first misalignment opening 230 is formed at the bottom of the first telescopic arm 200, and one side of the first misalignment opening 230 extends outward from the other end of the first telescopic arm 200; a second misalignment opening 330 is formed at the top of the second telescopic arm 300, and the second... One side of the misalignment opening 330 extends outward from the other end of the second telescopic arm 300. When the first telescopic arm 200 and the second telescopic arm 300 slide into the sliding sleeve 110, the first misalignment opening 230 and the second misalignment opening 330 can be engaged with each other, thereby giving the first telescopic arm 200 and the second telescopic arm 300 a larger range of telescopic movement. The first telescopic arm 200 has symmetrical first limiting grooves 240 on both sides, and the second telescopic arm 300 has symmetrical second limiting grooves 340 on both sides. The sliding sleeve 110 is equipped with a first limiting pin 250 that matches the first limiting groove 240 and a second limiting pin 350 that matches the second limiting groove 340. The above structure can not only provide support and positioning when the ends of the first telescopic arm 200 and the second telescopic arm 300 are extended, but also limit the extreme positions of the extension and retraction of the first telescopic arm 200 and the second telescopic arm 300.

[0042] More in detail, such as Figure 10As shown, the two-axis camera gimbal assembly 500 includes a base plate 510, a transparent cover 520, a two-axis movable arm assembly, and a camera assembly 530. The base plate 510 is fixedly mounted on the first telescopic arm 200 and the second telescopic arm 300. The two-axis movable arm assembly includes a first joint motor 540, a first curved arm 550, a second joint motor 560, and a second curved arm 570. The first joint motor 540 is fixedly mounted to the base plate 510, and the rotation axis of its output shaft is vertical. Its bottom is fixedly connected to the output shaft of the first joint motor 540. The first curved arm 550 has an upwardly extending first connecting part 551 on one side, making the longitudinal section of the first curved arm 550 L-shaped. A clearance area 580 is provided above the first curved arm 550. The second joint motor 560 and the second curved arm 570 are connected to the first curved arm 570. A connecting part 551 is fixedly connected and the rotation axis of the output shaft is horizontal. The longitudinal section of the second curved arm 570 is an L-shaped structure and one side of the second curved arm 570 is fixedly connected to the output shaft of the second joint motor 560. The top surface of the camera assembly 530 is fixedly installed at the bottom of the second curved arm 570. The second curved arm 570 surrounds the side and top surfaces of the camera assembly 530. The second joint motor 560, the second curved arm 570 and the camera assembly 530 are all located within the clearance area 580, thereby making the structure of the camera assembly 530 and the two-axis curved arm assembly more compact and saving installation space. The transparent cover 520 is a hemispherical structure and is detachably installed with the base plate 510. The two-axis movable arm assembly and the camera assembly 530 are located inside the transparent cover 520.

[0043] In summary, the visual inspection pan-tilt unit for defects of the beam crane in this embodiment is suspended in the hook 900 of the crane via the hanger 100. After it is lifted, it slowly moves along the main beam guide rail via the trolley, allowing the two-axis camera pan-tilt unit assembly 500 to observe the area below the main beam, the electric hoist, and the operation of the trolley. The side of the outriggers can be observed through the lifting and lowering action of the wire rope, eliminating the need for manual climbing and reducing the difficulty of inspection. Furthermore, the extension and retraction of the first telescopic arm 200 and the second telescopic arm 300 can increase the observation range and angle of the camera, thereby improving both work safety and efficiency, as well as the accuracy and comprehensiveness of structural and operational inspections.

[0044] The foregoing description of specific exemplary embodiments of the present invention is for illustrative and explanatory purposes. These descriptions are not intended to limit the invention to the precise forms disclosed, and it is obvious that many changes and variations can be made based on the above teachings. Although embodiments of the invention have been shown and described, these specific embodiments are merely explanations of the invention and are not intended to limit it. The specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. The purpose of selecting and describing exemplary embodiments is to explain the specific principles of the invention and its practical application, so that those skilled in the art, after reading this specification, can make modifications, substitutions, variations, and various choices and changes to the embodiments as needed without departing from the principles and spirit of the invention, provided that such modifications, substitutions, variations, and choices and changes are within the scope of the claims of the invention and are protected by patent law.

Claims

1. A visual inspection platform for defects in a beam crane, characterized in that, include: The bracket has a sliding sleeve with a sliding channel extending through its two opposite ends. A first telescopic arm and a second telescopic arm are fitted inside the sliding channel. A synchronous drive is installed between the sliding sleeve and the first and second telescopic arms. The synchronous drive can drive one end of the first telescopic arm and one end of the second telescopic arm to extend and retract synchronously outward from the end of the sliding sleeve. A two-axis camera gimbal assembly is installed at one end of the first telescopic arm and one end of the second telescopic arm, respectively. The top of the bracket has a suspension part, and the bottom of the bracket has a first counterweight part.

2. The visual inspection platform for defects in a beam crane according to claim 1, characterized in that, The suspension part includes two side plates. The bottom of the side plates is welded to the bracket. A suspension column is welded between the opposite sides of the two side plates. The axis of the suspension column is horizontally set and is consistent with the direction of the sliding channel.

3. The visual inspection platform for defects in beam cranes according to claim 2, characterized in that, The suspension column is fitted with two clamps, the surface of which is perpendicular to the axis of the suspension column and can slide along the suspension column. Several guide rods are provided on the opposite side of the two clamps, and guide sleeves matching the guide rods are provided on the side plate. The guide rods are slidably inserted into the guide sleeves. A first nut is welded to the side plate, and a tightening bolt is provided inside the first nut. The end of the tightening bolt abuts against the side of the clamp. When the tightening bolt is tightened, it can drive the two clamps to move closer to each other.

4. The visual inspection platform for defects in a beam crane according to claim 1, characterized in that, The first counterweight includes a first pad and a second pad. The top surface of the first pad is welded to the bottom of the bracket. A plurality of through-nails are provided through the top and bottom surfaces of the first pad. A first stud is provided on the top surface of the second pad. The end of the first stud passes through the through-nails from the bottom surface of the first pad and is locked by a second nut. A plurality of first counterweights are sleeved on the first stud. The first counterweights are sandwiched between the first pad and the second pad.

5. The visual inspection platform for defects in a beam crane according to claim 1, characterized in that, The synchronous drive component includes a drive motor, a first synchronous pulley, a second synchronous pulley, a first synchronous belt, a second synchronous belt, a first connecting seat, a second connecting seat, and a wheel seat. The number of wheel seats, the number of the first synchronous pulley, and the number of the second synchronous pulley are both two. Two wheel seats are fixedly installed near both ends of the sliding sleeve. The drive motor is fixedly installed on one of the wheel seats. One first synchronous pulley and one second synchronous pulley are coaxially installed on the output shaft of the drive motor. Another first synchronous pulley and another second synchronous pulley are coaxially installed on the other wheel seat. The first synchronous belt is fitted between the two first synchronous pulleys and connected to the first telescopic arm via the first connecting seat. The second synchronous belt is fitted between the two second synchronous pulleys and connected to the second telescopic arm via the second connecting seat. The first connecting seat and the second connecting seat are aligned. The drive motor can drive the first synchronous belt and the second synchronous belt to move synchronously.

6. The visual inspection platform for defects in a beam crane according to claim 5, characterized in that, A second counterweight is installed on another wheel seat, the weight of which is the same as the weight of the drive motor. The second counterweight includes a third pad, a fourth pad, a second counterweight block, and a third nut. The third pad is fixedly connected to the wheel seat. A second stud is provided on the third pad. The second counterweight block and the fourth pad are fitted onto the second stud, with the second counterweight block located between the third pad and the fourth pad. The third nut is installed on the second stud and presses the fourth pad tightly.

7. The visual inspection platform for defects in a beam crane according to claim 5, characterized in that, The first telescopic arm has a first clearance groove in the middle and a first clearance opening at the other end of the first telescopic arm that communicates with the end of the first clearance groove; the second telescopic arm has a second clearance groove in the middle and a second clearance opening at the other end of the first telescopic arm that communicates with the end of the second clearance groove; the first synchronous belt can pass through the first clearance groove and the first clearance opening, and the second synchronous belt can pass through the second clearance groove and the second clearance opening.

8. The visual inspection platform for defects in a beam crane according to claim 7, characterized in that, The bottom of the first telescopic arm is provided with a first misalignment opening, and one side of the first misalignment opening extends outward from the other end of the first telescopic arm. The top of the second telescopic arm is provided with a second misalignment opening, and one side of the second misalignment opening extends outward from the other end of the second telescopic arm. When the first telescopic arm and the second telescopic arm slide into the sliding sleeve, the first misalignment opening and the second misalignment opening can be engaged with each other.

9. The visual inspection platform for defects in a beam crane according to claim 1, characterized in that, The first telescopic arm has a first limiting groove on both sides, the second telescopic arm has a second limiting groove on both sides, and the sliding sleeve has a first limiting pin that matches the first limiting groove and a second limiting pin that matches the second limiting groove on both sides.

10. The visual inspection platform for defects in a beam crane according to claim 1, characterized in that, The two-axis camera gimbal assembly includes a base plate, a transparent cover, a two-axis movable arm assembly, and a camera assembly. The base plate is fixedly mounted on the first telescopic arm and the second telescopic arm. The two-axis movable arm assembly includes a first joint motor, a first curved arm, a second joint motor, and a second curved arm. The first joint motor is fixedly mounted to the base plate, and its output shaft rotation axis is vertical. The bottom of the first curved arm is fixedly connected to the output shaft of the first joint motor. One side of the first curved arm has an upwardly extending first connecting portion, and a clearance area is provided above the first curved arm. The second joint motor is fixedly connected to the first connecting portion, and its output shaft rotation axis is horizontal. One side of the second curved arm is fixedly connected to the output shaft of the second joint motor. The camera assembly is fixedly mounted at the bottom of the second curved arm and located within the clearance area. The transparent cover is a hemispherical structure and is detachably mounted to the base plate. The two-axis movable arm assembly and the camera assembly are located inside the transparent cover.

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