A type of double-girder bridge crane

Abstract

This invention relates to the field of crane technology, specifically to a double-girder bridge crane, comprising two fixed top beams. Each of the two fixed top beams has a sliding block mounted on its upper surface. The sliding block moves above the fixed top beams via a controller. Two crane main beams are mounted on the side walls of the sliding blocks. A rectangular plate is mounted on the upper surface of the crane main beams, and a lifting seat is mounted at the bottom of the rectangular plate. A hook is provided at the bottom of the lifting seat. A guide rail is fixedly mounted on the upper surface of the crane main beams. A drive block moves the rectangular plate and the cargo lifted below it. Alternatively, the sliding block can be controlled to move on the upper surface of the fixed top beams, causing the sliding block to move the crane main beams. Thus, the crane main beams can move the drive block, rectangular plate, and lifting seat, facilitating the transfer of the lifting seat, hook, and cargo to a suitable position for subsequent use.

Description

Technical Field

[0001] This invention relates to the field of crane technology, specifically to a double-girder bridge crane. Background Technology

[0002] Bridge cranes are lifting equipment that spans across workshops, warehouses, and material yards to lift and transport materials. Bridge cranes can run longitudinally along the tracks laid on the elevated structures on both sides, making full use of the space under the bridge to lift and transport materials without being obstructed by ground equipment. Bridge cranes are the most widely used and numerous type of lifting machinery.

[0003] Existing technologies also offer some solutions, such as a Chinese patent application (CN223060552U) that discloses a bridge crane. This bridge crane includes a guide rail, a trolley, a current collector, a sliding contact line, a lifting component, and a cleaning component. The trolley is movably mounted on the guide rail. The sliding contact line is connected to the trolley via the current collector, which is slidably mounted on the sliding contact line. The lifting component and the cleaning component are mounted on the trolley, and the cleaning component is used to clean the sliding contact line. This bridge crane can promptly clean accumulated dirt and dust on the sliding contact line during operation, preventing accidents and improving production efficiency and convenience.

[0004] While the above-mentioned technical solution can clean up the dirt and dust accumulated on the sliding contact line in a timely manner during operation, there are still other problems in actual use. For example, during the lifting and transfer of goods, the handle of the goods needs to be placed on the hook surface and fixed by the fixing mechanism. After the transfer of goods is completed and the goods are on the ground, the staff often need to manually unlock the fixing mechanism, which is quite troublesome.

[0005] Therefore, it is necessary to provide a double-girder bridge crane to solve the above problems.

[0006] It should be noted that the information disclosed in this background section is only for understanding the background technology of the present invention, and therefore may include information that does not constitute prior art. Summary of the Invention

[0007] The technical solution adopted by the present invention to solve its technical problem is: a double main beam bridge crane, including two fixed top beams, each of the two fixed top beams having a movable block slidably mounted on its upper end surface, the movable block moving above the fixed top beams via a controller, two crane main beams mounted on the side wall of the movable block, a rectangular plate being mounted on the upper end surface of the crane main beams, a lifting seat being mounted on the bottom of the rectangular plate, and a hook being provided at the bottom of the lifting seat.

[0008] Furthermore, a guide rail is fixedly installed on the upper end face of the crane main beam, and a drive block is slidably arranged on the outer surface of the guide rail. The drive block has a groove inside that matches the guide rail. A rectangular plate is fixedly installed on the circumferential surface of the drive block, and a winding wheel is rotatably arranged on the bottom of the rectangular plate via a bracket. A rope assembly is arranged on the outer circumferential surface of the winding wheel, and the bottom of the rope assembly is fixedly connected to the upper end face of the lifting seat. During operation, after the lifting seat and hook lift the goods to be transferred, the winding wheel is controlled to rotate, causing it to wind up the rope assembly and lift the lifting seat and hook upwards. Then, the drive block is controlled to move on the outer surface of the guide rail, causing the drive block to move the rectangular plate and the goods lifted below. Alternatively, the moving block can be controlled to move on the upper end face of the fixed top beam, causing it to move the crane main beam. In this way, the crane main beam can move the drive block, the rectangular plate, and the lifting seat, which facilitates the transfer of the lifting seat, hook, and goods to a suitable position for subsequent use of the goods.

[0009] Furthermore, the hanging seat has a vertical groove inside, and an elastic seat is fixedly installed on the top wall of the vertical groove. A spring is provided on the outer surface of the elastic seat, and a fixed vertical rod is fixedly installed at the bottom of the elastic seat. The hook is fixedly installed at the bottom of the fixed vertical rod, and a limiting inclined rod is rotatably disposed on both sides of the fixed vertical rod. A rotating shaft is provided at the contact position between the limiting inclined rod and the fixed vertical rod, and a torsion spring is sleeved on the outer surface of the rotating shaft. The bottom edge of the limiting inclined rod contacts the side wall of the hook. During operation, in the initial state, that is, when there is no cargo inside the hook, the elastic seat is not subjected to the tension of the fixed vertical rod. When the hook surface... When the goods are hung up, and the rope assembly above lifts the lifting platform and the goods, the fixed vertical rod and the lifting platform are subjected to the weight of the goods. The fixed vertical rod will pull the elastic seat at its top, causing the elastic seat to deform. Under the elastic force of the torsion spring, the limiting diagonal rod will once again be located at the edge of the hook. That is, during the lifting and transfer of goods, the end of the limiting diagonal rod will always be in contact with the side wall of the hook. This facilitates the lifting and transfer of goods, and the limiting diagonal rod can always limit the handle of the goods, preventing the handle from detaching from the hook due to the centrifugal force generated by the swing of the goods during the transfer process, thus ensuring the safety of the goods during the transfer process.

[0010] Furthermore, a limiting column is fixedly installed at the bottom of the hanging base, and a guide groove is provided on the side wall of the limiting inclined rod. The bottom of the limiting column is located inside the guide groove, and the shape of the bottom of the limiting column matches the shape of the guide groove.

[0011] Furthermore, a guide slider is fixedly installed on the side wall of the fixed vertical rod. The shape of the guide slider matches the shape of the vertical groove. A support spring is fixedly installed at the bottom of the guide slider, and the bottom of the support spring is connected to the inner wall of the hanging seat. During operation, when the fixed vertical rod is subjected to the pulling force of the cargo, the fixed vertical rod will simultaneously drive the guide slider to move down and compress the support spring. After the cargo is lifted to a suitable position and placed back on the ground, the fixed vertical rod is no longer subjected to the weight of the cargo. Therefore, under the elastic force of the support spring and the elastic seat, the fixed vertical rod will gradually drive the limiting inclined rod to move up, and make the inclined surface of the limiting inclined rod contact the bottom end of the limiting column again. Moreover, under the pressure of the limiting column, the limiting inclined rod will gradually move away from the hook, which facilitates the subsequent removal of the cargo. The support spring can work with the elastic seat to quickly drive the fixed vertical rod to return to its original position. Moreover, this design eliminates the need for workers to manually bend the limiting inclined rod, reducing the workload of workers.

[0012] Furthermore, an elastic limiting block is fixedly installed at the bottom of the limiting angle rod, and an embedding groove is formed on the surface of the hook. The shape of the elastic limiting block matches the shape of the embedding groove, and the surface of the embedding groove has rounded corners. During operation, when the bottom end of the limiting angle rod contacts the hook, the elastic limiting block at the bottom of the limiting angle rod will be located inside the embedding groove, and the elastic limiting block and the embedding groove will limit each other. This can further prevent the goods from coming off the hook during the lifting and transfer process, and further improve the safety of the goods during transfer.

[0013] Furthermore, two toothed plates are fixedly installed on the side wall of the fixed vertical rod away from the limiting inclined rod. The two toothed plates are symmetrically designed to correspond to the fixed vertical rod. A support frame is fixedly installed at the bottom of the hanging seat. A gear is rotatably installed inside the support frame. The gear and the toothed plate are meshed and connected. A pressing unit is provided on the outer surface of the gear. The pressing unit is used to press against the outer surface of the goods.

[0014] Furthermore, the pressure-absorbing unit includes multiple L-shaped support rods, with two L-shaped support rods on one of the gear surfaces. A pressure-absorbing plate is located at the bottom of each L-shaped support rod. During operation, in the initial state, when the fixed vertical rod is not subjected to the weight of the goods, the bottom of the L-shaped support rod is close to the side of the fixed vertical rod. When the fixed vertical rod is subjected to the weight of the goods, and the goods are lifted, the fixed vertical rod moves downwards, simultaneously causing the toothed plate on its sidewall to move downwards. Because the toothed plate and gear are meshed, the toothed plate rotates the gear during its downward movement, causing the gear to rotate the L-shaped support rods on its outer surface. That is, the L-shaped support rods rotate away from the fixed vertical rod. Afterwards, when the goods are completely lifted, the pressure-absorbing plate at the bottom of the L-shaped support rod presses against the surface of the goods. This reduces the swaying of the goods during subsequent transport, preventing the goods from falling or hitting other equipment due to excessive swaying.

[0015] Furthermore, an electric telescopic rod is installed inside the L-shaped support rod, and the side wall of the pressure plate is connected to the telescopic end of the electric telescopic rod. A visual COD camera is installed on the side wall of the lifting seat. During operation, when the L-shaped support rod drives the pressure plate to rotate away from the fixed vertical rod, and the goods are lifted completely, if the bottom of the pressure plate is not in contact with the surface of the goods at this time, the telescopic end of the electric telescopic rod can be controlled to move further, so that the telescopic end of the electric telescopic rod drives the pressure plate to move downward, thereby allowing the pressure plate to press further against the surface of the goods, facilitating the subsequent transfer of goods.

[0016] Furthermore, the lower end face of the pressure plate is provided with rubber protrusions, and the side wall of the support frame is provided with a rotating shaft adapted to the gear.

[0017] The beneficial effects of this invention are as follows: The double-girder bridge crane provided by this invention, under the elastic force of the support spring and the elastic seat, the fixed vertical rod will gradually drive the limiting inclined rod to move upward, so that the inclined surface of the limiting inclined rod will contact the bottom end of the limiting column again. Moreover, under the pressure of the limiting column, the limiting inclined rod will gradually move away from the hook, which facilitates the subsequent removal of goods. The support spring is provided so that it can work with the elastic seat to quickly drive the fixed vertical rod to return to its original position. In addition, this design eliminates the need for workers to manually bend the limiting inclined rod, reducing the workload of workers.

[0018] In addition to the objectives, features, and advantages described above, the present invention has other objectives, features, and advantages. The invention will now be described in further detail with reference to the figures. Attached Figure Description

[0019] The accompanying drawings, which form part of this specification, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0020] Figure 1 This is an overall schematic diagram of the present invention;

[0021] Figure 2 This is a schematic diagram of the main beam structure of the crane in this invention;

[0022] Figure 3 This is a schematic diagram of the rectangular plate portion of the present invention;

[0023] Figure 4 This is a schematic diagram of the hanging bracket structure in this invention;

[0024] Figure 5 This is a schematic diagram of the rope assembly structure in this invention;

[0025] Figure 6 This is a schematic diagram of the hook part in this invention;

[0026] Figure 7 This is a schematic diagram of the fixed vertical rod structure in this invention;

[0027] Figure 8 This is a schematic diagram of the limiting inclined rod structure in this invention;

[0028] Figure 9 This is a schematic diagram of the pressure plate part in the present invention.

[0029] The following are the labeling elements in the figure:

[0030] 1. Fixed top beam; 2. Moving block; 3. Crane main beam; 301. Guide rail; 4. Rectangular plate; 401. Winding wheel; 402. Pull rope assembly; 5. Lifting seat; 501. Hook; 6. Drive block; 7. Vertical groove; 8. Elastic seat; 801. Fixed vertical rod; 802. Limiting diagonal rod; 803. Torsion spring; 9. Limiting column rod; 10. Guide groove; 11. Guide slider; 12. Support spring; 13. Elastic limiting block; 14. Embedded groove; 15. Toothed plate; 16. Support frame; 17. Gear; 18. L-shaped support rod; 19. Pressure plate; 20. Electric telescopic rod. Detailed Implementation

[0031] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0032] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. 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 should fall within the scope of protection of the present invention.

[0033] like Figures 1 to 9 As shown, the present invention provides a double main beam bridge crane, including two fixed top beams 1. Each of the two fixed top beams 1 has a movable block 2 slidably mounted on its upper end surface. The movable block 2 moves above the fixed top beams 1 via a controller. Two crane main beams 3 are installed on the side walls of the movable block 2. A rectangular plate 4 is installed on the upper end surface of the crane main beams 3. A lifting seat 5 is installed at the bottom of the rectangular plate 4. A hook 501 is provided at the bottom of the lifting seat 5. The hook 501 is a double hook design, and each hook body is a curved design. The limiting diagonal bar 802 is used to cooperate with the hook 501 and limit the opening of the hook 501.

[0034] During operation, when transferring goods, the handle of the goods is placed at the opening of the hook 501. Then, the limiting diagonal bar 802 is pressed against the opening of the hook 501, so that the limiting diagonal bar 802 limits the opening of the hook 501. Then, the goods are lifted and the drive block 6 is moved on the outer surface of the guide rail 301, so that the drive block 6 moves the rectangular plate 4 and the goods suspended below. Alternatively, the moving block 2 can be moved on the upper end face of the fixed top beam 1, so that the moving block 2 moves the crane main beam 3 to transfer the goods to a suitable position. Through the cooperation of the limiting diagonal bar 802 and the hook 501, the problem of the goods separating due to centrifugal force during the transfer process can be avoided. Moreover, the double hooks can distribute the load of the goods during the transfer process through the symmetrical hook bodies, further improving the safety of the goods during the transfer.

[0035] A guide rail 301 is fixedly installed on the upper end face of the main beam 3 of the crane. A drive block 6 is slidably arranged on the outer surface of the guide rail 301. A groove adapted to the guide rail 301 is opened inside the drive block 6. A rectangular plate 4 is fixedly installed on the circumferential surface of the drive block 6. A winding wheel 401 is rotatably arranged on the bottom of the rectangular plate 4 through a bracket. A pull rope assembly 402 is arranged on the outer circumferential surface of the winding wheel 401. The bottom of the pull rope assembly 402 is fixedly connected to the upper end face of the lifting seat 5.

[0036] During operation, after the lifting platform 5 and hook 501 lift the goods to be transferred, the winding wheel 401 is rotated to wind up the rope assembly 402, which in turn lifts the lifting platform 5 and hook 501 upwards. Then, the drive block 6 is moved on the outer surface of the guide rail 301, causing the drive block 6 to move the rectangular plate 4 and the goods lifted below. Alternatively, the moving block 2 can be moved on the upper surface of the fixed top beam 1, causing the moving block 2 to move the crane main beam 3. In this way, the crane main beam 3 can move the drive block 6, the rectangular plate 4, and the lifting platform 5, which facilitates the transfer of the lifting platform 5, hook 501, and goods to a suitable position for subsequent use of the goods.

[0037] The hanging base 5 has a vertical groove 7 inside. An elastic seat 8 is fixedly installed on the top wall of the vertical groove 7. A spring is provided on the outer surface of the elastic seat 8. A fixed vertical rod 801 is fixedly installed on the bottom of the elastic seat 8. The hook 501 is fixedly installed on the bottom of the fixed vertical rod 801. The limiting inclined rod 802 is rotatably disposed on both sides of the fixed vertical rod 801. A rotating shaft is provided at the contact position between the limiting inclined rod 802 and the fixed vertical rod 801. A torsion spring 803 is sleeved on the outer surface of the rotating shaft. The bottom edge of the limiting inclined rod 802 contacts the side wall of the hook 501.

[0038] During operation, in the initial state, i.e., when there is no cargo inside the hook 501, the elastic seat 8 is not subjected to the tension of the fixed vertical rod 801. The positions of the limiting diagonal rod 802 and the hook 501 are as shown in the attached figure. Figure 4 As shown, when goods are hung on the surface of hook 501, and the pull rope assembly 402 above lifts the lifting seat 5 and the goods, the fixed vertical rod 801 and the lifting seat 5 are subjected to the weight of the goods. The fixed vertical rod 801 will pull the elastic seat 8 at its top, causing the elastic seat 8 to deform. Under the elastic force of the torsion spring 803, the limiting angle rod 802 is again located at the edge of hook 501. That is, during the lifting and transfer of goods, the end of the limiting angle rod 802 will always be in contact with the side wall of hook 501. This facilitates the lifting and transfer of goods, and the limiting angle rod 802 can always limit the handle of the goods, preventing the handle from coming off the hook due to the centrifugal force generated by the swing of the goods during the transfer process, thus ensuring the safety of the goods during the transfer process.

[0039] The bottom of the hanging base 5 is fixedly installed with a limiting column rod 9, and the side wall of the limiting inclined rod 802 is provided with a guide groove 10. The bottom of the limiting column rod 9 is located inside the guide groove 10, and the shape of the bottom of the limiting column rod 9 is adapted to the shape of the guide groove 10.

[0040] During operation, in the initial state, the bottom of the limiting rod 9 is located inside the guide groove 10, as shown in the attached diagram. Figure 4As shown, at this time, the bottom end of the limiting rod 802 is not in contact with the hook 501. That is, the handle of the goods can be placed on the surface of the hook 501 through the gap between the limiting rod 802 and the hook 501. At this time, the torsion spring 803 is in a contracted state under the pressure of the bottom of the limiting rod 9 against the limiting rod 802. After the goods are lifted up, the fixed vertical rod 801 will drive the limiting rod 802 to gradually move away from the bottom of the limiting rod 9. That is, the bottom of the limiting rod 9 will no longer squeeze the limiting rod 802. In this way, the limiting rod 802 will rotate to the side wall of the hook 501 under the action of the torsion spring 803. That is, the bottom end of the limiting rod 802 will be pressed tightly against the side wall of the hook 501, which facilitates the subsequent transfer of goods.

[0041] A guide slider 11 is fixedly installed on the side wall of the fixed vertical rod 801. The shape of the guide slider 11 is adapted to the shape of the vertical groove 7. A support spring 12 is fixedly installed at the bottom of the guide slider 11. The bottom of the support spring 12 is connected to the inner wall of the hanging seat 5.

[0042] During operation, when the fixed vertical rod 801 is pulled by the cargo, it will simultaneously drive the guide slider 11 to move downward and compress the support spring 12. After the cargo is lifted to a suitable position and placed back on the ground, the fixed vertical rod 801 is no longer subjected to the weight of the cargo. Therefore, under the elastic force of the support spring 12 and the elastic seat 8, the fixed vertical rod 801 will gradually drive the limiting inclined rod 802 to move upward, so that the inclined surface of the limiting inclined rod 802 will contact the bottom end of the limiting column rod 9 again. Moreover, under the pressure of the limiting column rod 9, the limiting inclined rod 802 will gradually move away from the hook 501, which facilitates the subsequent removal of the cargo. The support spring 12 can work with the elastic seat 8 to quickly drive the fixed vertical rod 801 to return to its original position. Moreover, this design eliminates the need for workers to manually bend the limiting inclined rod 802, reducing the workload of workers.

[0043] An elastic limiting block 13 is fixedly installed at the bottom of the limiting diagonal rod 802. An embedding groove 14 is provided on the surface of the hook 501. The shape of the elastic limiting block 13 is adapted to the shape of the embedding groove 14. The surface of the embedding groove 14 is provided with rounded corners.

[0044] During operation, when the bottom end of the limiting bar 802 contacts the hook 501, the elastic limiting block 13 at the bottom of the limiting bar 802 will be located inside the embedding groove 14, and the elastic limiting block 13 and the embedding groove 14 will limit each other. This can further prevent the goods from coming off the hook during the lifting and transfer process, and further improve the safety of the goods during transfer.

[0045] Two toothed plates 15 are fixedly installed on the side wall of the fixed vertical rod 801 away from the limiting inclined rod 802. The two toothed plates 15 are symmetrically designed to correspond to the fixed vertical rod 801. A support frame 16 is fixedly installed at the bottom of the hanging base 5. A gear 17 is rotatably arranged inside the support frame 16. The gear 17 is meshed with the toothed plates 15. A pressing unit is provided on the outer surface of the gear 17. The pressing unit is used to press against the outer surface of the goods.

[0046] The pressing unit includes an L-shaped support rod 18, and multiple L-shaped support rods 18 are provided, with two L-shaped support rods 18 on the surface of one of the gears 17. A pressing plate 19 is provided at the bottom of the L-shaped support rod 18.

[0047] During operation, in the initial state, when the fixed vertical rod 801 is not under the weight of the goods, the bottom end of the L-shaped support rod 18 is close to the side of the fixed vertical rod 801. When the fixed vertical rod 801 is under the weight of the goods and the goods are lifted, during the downward movement of the fixed vertical rod 801, the fixed vertical rod 801 will simultaneously drive the toothed plate 15 on its side wall to move downward. Since the toothed plate 15 and the gear 17 are meshed, the toothed plate 15 will drive the gear 17 to rotate during the downward movement, causing the gear 17 to drive the L-shaped support rod 18 on its outer surface to rotate. That is, the L-shaped support rod 18 will rotate away from the fixed vertical rod 801. Afterward, when the goods are lifted completely, the pressure plate 19 at the bottom of the L-shaped support rod 18 will press against the surface of the goods. This can reduce the phenomenon of swinging of the goods during subsequent transfer and avoid the problem of the goods falling or touching other equipment due to excessive swing amplitude.

[0048] An electric telescopic rod 20 is installed inside the L-shaped support rod 18. The side wall of the pressure plate 19 is connected to the telescopic end of the electric telescopic rod 20. A visual COD camera is provided on the side wall of the hanging seat 5. Rubber protrusions are provided on the lower end face of the pressure plate 19. A rotating shaft that is compatible with the gear 17 is provided on the side wall of the support frame 16.

[0049] During operation, when the L-shaped support rod 18 drives the pressure plate 19 to rotate away from the fixed vertical rod 801, and the goods are lifted up completely, if the bottom of the pressure plate 19 is not in contact with the surface of the goods at this time, the telescopic end of the electric telescopic rod 20 can be controlled to move, so that the telescopic end of the electric telescopic rod 20 drives the pressure plate 19 to move down, so that the pressure plate 19 can press further on the surface of the goods, which facilitates the subsequent transfer of goods. The status of the goods can be observed in real time through the visual COD camera, and the distance between the bottom of the pressure plate 19 and the goods can also be observed.

[0050] Working principle: After the lifting seat 5 and hook 501 lift the goods to be transferred, the winding wheel 401 is rotated by controlling the winding wheel 401 to wind up the rope assembly 402. The rope assembly 402 lifts the lifting seat 5 and hook 501 upwards. Then, the drive block 6 is moved on the outer surface of the guide rail 301, so that the drive block 6 moves the rectangular plate 4 and the goods lifted below. Alternatively, the moving block 2 can be moved on the upper surface of the fixed top beam 1, so that the moving block 2 moves the crane main beam 3. In this way, the crane main beam 3 can move the drive block 6, the rectangular plate 4 and the lifting seat 5, so that the lifting seat 5, hook 501 and goods can be transferred to a suitable position for convenient use of the goods.

[0051] In the initial state, when there is no cargo inside the hook 501, the elastic seat 8 is not under the tension of the fixed vertical rod 801. The positions of the limiting diagonal rod 802 and the hook 501 are as shown in the attached figure. Figure 4 As shown, when goods are hung on the surface of hook 501, and the pull rope assembly 402 above lifts the lifting seat 5 and the goods, the fixed vertical rod 801 and the lifting seat 5 are subjected to the weight of the goods. The fixed vertical rod 801 will pull the elastic seat 8 at its top, causing the elastic seat 8 to deform. Under the elastic force of the torsion spring 803, the limiting angle rod 802 is again located at the edge of hook 501. That is, during the lifting and transfer of goods, the end of the limiting angle rod 802 will always be in contact with the side wall of hook 501. This facilitates the lifting and transfer of goods, and the limiting angle rod 802 can always limit the handle of the goods, preventing the handle from detaching due to the centrifugal force generated by the swing of the goods during the transfer process, thus ensuring the safety of the goods during the transfer process. In the initial state, the bottom of the limiting rod 9 is located inside the guide groove 10, and refers to the attached... Figure 4 As shown, at this time, the bottom end of the limiting rod 802 and the hook 501 are not in contact. That is, the handle of the goods can be placed on the surface of the hook 501 through the gap between the limiting rod 802 and the hook 501. At this time, the torsion spring 803 is in a contracted state under the pressure of the bottom of the limiting rod 9 against the limiting rod 802. After the goods are lifted up, the fixed vertical rod 801 will drive the limiting rod 802 to gradually move away from the bottom of the limiting rod 9. That is, the bottom of the limiting rod 9 will no longer squeeze the limiting rod 802. In this way, the limiting rod 802 will rotate to the side wall of the hook 501 under the action of the torsion spring 803. That is, the bottom end of the limiting rod 802 will be pressed tightly against the side wall of the hook 501, which facilitates the subsequent transfer of goods.

[0052] When the fixed vertical rod 801 is subjected to the pulling force of the cargo, the fixed vertical rod 801 will simultaneously drive the guide slider 11 to move downward and compress the support spring 12. After the cargo is lifted to a suitable position and placed back on the ground, the fixed vertical rod 801 is no longer subjected to the weight of the cargo. Therefore, under the elastic force of the support spring 12 and the elastic seat 8, the fixed vertical rod 801 will gradually drive the limiting inclined rod 802 to move upward, so that the inclined surface of the limiting inclined rod 802 will contact the bottom end of the limiting column rod 9 again. Moreover, under the pressure of the limiting column rod 9, the limiting inclined rod 802 will gradually move away from the hook 501. This design facilitates the subsequent removal of goods. A support spring 12 is included, which, in conjunction with the elastic seat 8, can quickly restore the fixed vertical rod 801. Moreover, this design eliminates the need for workers to manually pry open the limiting bar 802, reducing their workload. When the bottom end of the limiting bar 802 contacts the hook 501, the elastic limiting block 13 at the bottom of the limiting bar 802 will be located inside the embedding groove 14, and the elastic limiting block 13 and the embedding groove 14 will mutually limit each other. This further prevents the goods from detaching during the lifting and transfer process and further improves the safety of the goods during transfer.

[0053] In the initial state, when the fixed vertical rod 801 is not subjected to the weight of the cargo, the bottom end of the L-shaped support rod 18 is close to the side of the fixed vertical rod 801. When the fixed vertical rod 801 is subjected to the weight of the cargo, and the cargo is lifted, during the downward movement of the fixed vertical rod 801, the fixed vertical rod 801 will simultaneously drive the toothed plate 15 on its side wall to move downward. Since the toothed plate 15 and the gear 17 are meshed, the toothed plate 15 will drive the gear 17 to rotate during the downward movement, causing the gear 17 to drive the L-shaped support rod 18 on its outer surface to rotate. That is, the L-shaped support rod 18 will rotate away from the fixed vertical rod 801. Afterward, when the cargo is completely lifted, the L... The pressure plate 19 at the bottom of the L-shaped support rod 18 presses against the surface of the goods, which reduces the swaying of the goods during subsequent transfer and avoids the problem of the goods falling or touching other equipment due to excessive swaying. When the L-shaped support rod 18 drives the pressure plate 19 to rotate away from the fixed vertical rod 801 and the goods are lifted up, if the bottom of the pressure plate 19 is not in contact with the surface of the goods at this time, the telescopic end of the electric telescopic rod 20 can be controlled to move, so that the telescopic end of the electric telescopic rod 20 drives the pressure plate 19 to move down, so that the pressure plate 19 can further press against the surface of the goods, which facilitates the subsequent transfer of goods.

[0054] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A double-girder bridge crane, characterized in that: It includes two fixed top beams, and each of the two fixed top beams has a movable block slidably mounted on its upper end surface. The movable block moves above the fixed top beam via a controller. Two crane main beams are installed on the side walls of the movable blocks. A rectangular plate is installed on the upper end surface of the crane main beams. A lifting seat is installed at the bottom of the rectangular plate. A hook is provided at the bottom of the lifting seat. A limiting diagonal bar is provided below the lifting seat. The limiting diagonal bar is used to cooperate with the hook and limit the opening of the hook. The hanging seat has a vertical groove inside. An elastic seat is fixedly installed on the top wall of the vertical groove. A spring is provided on the outer surface of the elastic seat. A fixed vertical rod is fixedly installed at the bottom of the elastic seat. The hook is fixedly installed at the bottom of the fixed vertical rod. The limiting inclined rod is rotatably set on both sides of the fixed vertical rod. A rotating shaft is provided at the contact position between the limiting inclined rod and the fixed vertical rod. A torsion spring is sleeved on the outer surface of the rotating shaft. The bottom edge of the limiting inclined rod contacts the side wall of the hook. The bottom of the hanging base is fixedly installed with a limiting column rod, and the side wall of the limiting inclined rod is provided with a guide groove. The bottom of the limiting column rod is set inside the guide groove, and the shape of the bottom of the limiting column rod is adapted to the shape of the guide groove. A guide slider is fixedly installed on the side wall of the fixed vertical rod. The shape of the guide slider is adapted to the shape of the vertical groove. A support spring is fixedly installed at the bottom of the guide slider. The bottom of the support spring is connected to the inner wall of the hanging base.

2. A double-girder bridge crane according to claim 1, characterized in that: A guide rail is fixedly installed on the upper end face of the main beam of the crane. A drive block is slidably arranged on the outer surface of the guide rail. The drive block has a groove inside that matches the guide rail. A rectangular plate is fixedly installed on the circumferential surface of the drive block. A winding wheel is rotatably arranged on the bottom of the rectangular plate through a bracket. A pull rope assembly is arranged on the outer circumferential surface of the winding wheel. The bottom of the pull rope assembly is fixedly connected to the upper end face of the lifting seat.

3. A double-girder bridge crane according to claim 1, characterized in that: An elastic limiting block is fixedly installed at the bottom of the limiting diagonal rod, and an embedding groove is provided on the surface of the hook. The shape of the elastic limiting block is adapted to the shape of the embedding groove, and the surface of the embedding groove is provided with rounded corners.

4. A double-girder bridge crane according to claim 1, characterized in that: Two toothed plates are fixedly installed on the side wall of the fixed vertical rod away from the limiting diagonal rod. The two toothed plates are symmetrically designed to correspond to the fixed vertical rod. A support frame is fixedly installed at the bottom of the hanging base. A gear is rotatably installed inside the support frame. The gear and the toothed plate are meshed and connected. A pressing unit is provided on the outer surface of the gear. The pressing unit is used to press against the outer surface of the goods.

5. A double-girder bridge crane according to claim 4, characterized in that: The pressure unit includes an L-shaped support rod, and multiple L-shaped support rods are provided, with two L-shaped support rods on one of the gear surfaces. A pressure plate is provided at the bottom of the L-shaped support rod.

6. A double-girder bridge crane according to claim 5, characterized in that: An electric telescopic rod is installed inside the L-shaped support rod, and the side wall of the pressure plate is connected to the telescopic end of the electric telescopic rod.

7. A double-girder bridge crane according to claim 5, characterized in that: The lower end face of the pressure plate is provided with rubber protrusions, and the side wall of the support frame is provided with a rotating shaft adapted to the gear.

Images