Multi-beam safety guardrail of bridge crane

Abstract

The utility model discloses a multi-beam safety guardrail of a bridge crane, which comprises a bridge frame, guardrail top rods are arranged on two sides above the bridge frame, a plurality of guardrail stop levers are fixedly connected to the bottom ends of the guardrail top rods, and the guardrail stop levers are connected with the bridge frame through connecting components. According to the multi-beam safety guardrail of the bridge crane, through cooperation of the bridge frame, the guardrail top rod, the guardrail stop lever and the connecting assembly, the height driving structure of the guardrail top rod is designed more reasonably, and the meshing connection position needed by transmission can be protected by the bridge frame, the organ cover and the guardrail stop lever in the center; the meshing connection position is not affected by external factors, the stable operation state is not reduced, through driving of a single motor, height adjustment of the guardrail ejector rod can be achieved, the overall manufacturing cost of the structure can be reduced, the front side and the rear side of the bridge are simple and elegant, and application and popularization are facilitated.

Description

Technical Field

[0001] This utility model relates to the field of crane technology, specifically to a multi-beam safety guardrail for a bridge crane. Background Technology

[0002] Bridge cranes are lifting equipment that spans across workshops, warehouses, and material yards for material handling. Because their two ends are supported by tall concrete pillars or metal supports, resembling a bridge, the bridge frame of a bridge crane runs longitudinally along tracks laid on the elevated structures on both sides. It can make full use of the space under the bridge frame to lift materials without being obstructed by ground equipment. It is the most widely used and most numerous type of lifting machinery.

[0003] A utility model patent with the public WeChat account CN211945967U discloses a safety guardrail for a bridge crane, relating to the field of crane technology. It includes a guardrail top rod and a bridge frame. A gearbox is fixedly connected to one side of the bridge frame. The bottom of the guardrail top rod has an insertion hole adapted to a connecting plate. While this design allows the guardrail top rod to be lowered when not in use for crane maintenance and raised when needed, maximizing the use of the factory space, and avoids welding by inserting the connecting plate into the guardrail top rod and then securing it with connecting bolts, thus saving welding materials, the structural design for driving the safety guardrail's lifting and lowering is somewhat flawed. Because the meshing parts required for transmission are constantly exposed, if the factory interior is poorly regulated, external factors such as dust particles, non-metallic materials, and metal fragments can adhere to these parts, severely affecting the smoothness of transmission and hindering long-term stable operation. In addition, the lifting and lowering of the safety guardrail requires two drive motors, which results in a high overall cost and an unattractive appearance, hindering its widespread adoption. Utility Model Content

[0004] The purpose of this utility model is to provide a multi-beam safety guardrail for bridge cranes, which has a more reasonable height drive structure design for the safety guardrail, will not be affected by external factors and will reduce the stability of operation, and can reduce the overall cost of the structure. The sides of the bridge frame are also simple and elegant, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a multi-beam safety guardrail for a bridge crane, comprising a bridge frame, with guardrail top bars on both sides of the upper part of the bridge frame. Multiple guardrail stops are fixedly connected to the bottom end of each guardrail top bar. The guardrail stops are connected to the bridge frame via a connecting assembly. The connecting assembly includes a rack plate, which is vertically fixed inside the central guardrail stop. A toothed column is engaged with the front side of the rack plate. A rotating rod is fixedly connected to the inner wall of the toothed column. The rotating rod passes through the guardrail stop via a vertical groove. Both sides of the outer wall of the rotating rod are fitted with... The cable tray has a rubber sleeve that abuts against the guardrail bar. A bellows cover is provided on the outer side of the vertical groove and is fixedly connected to the guardrail bar. A sleeve plate is fitted onto the outer wall of the guardrail bar and is fixedly connected to the contact surface of the cable tray. A motor is fixedly connected to the top interior of the cable tray. A first bevel gear is fixedly connected to the output shaft of the motor. A second bevel gear is meshed below the first bevel gear. The inner wall of the second bevel gear is fixedly connected to a rotating rod. Support plates are fixedly connected to both sides of the top interior of the cable tray, and the support plates are rotatably connected to the rotating rod via ball bearings.

[0006] Preferably, the guardrail bar has a square cross-section, and the outer wall of the guardrail bar is fitted with the inner wall of the sleeve plate with a clearance.

[0007] Preferably, the lower surface of the cable tray has an opening, and a baffle is provided below the opening, the baffle being fixedly connected to the cable tray by bolts.

[0008] Preferably, a protective plate is provided between the toothed post and the cable tray, the protective plate is rotatably connected to the rotating rod through a sealed bearing, and the protective plate is fixedly connected to the cable tray by bolts.

[0009] Compared with the prior art, the beneficial effects of this utility model are as follows: The multi-beam safety guardrail for bridge cranes has the following advantages over traditional technology: Through the cooperation between the bridge frame, guardrail top rod, guardrail stop, and connecting components, the height of the guardrail top rod can be lowered when the crane is not under maintenance, and raised when needed, thereby maximizing the use of the factory space. The height drive structure design of the guardrail top rod is more reasonable, and the meshing connection required for transmission can be protected by the bridge frame, bellows cover, and the guardrail stop at the center. The meshing connection will not be affected by external factors, thus maintaining stable operation. Furthermore, the height adjustment of the guardrail top rod can be achieved through a single motor drive, which reduces the overall structural cost. The front and rear sides of the bridge frame are relatively simple and elegant, making it easy to promote and use. Attached Figure Description

[0010] The above and other features, advantages, and aspects of the embodiments of this disclosure will become more apparent from the accompanying drawings and the following detailed description. Throughout the drawings, the same or similar reference numerals denote the same or similar elements. It should be understood that the drawings are schematic, and the originals and elements are not necessarily drawn to scale.

[0011] Figure 1 This is a schematic diagram of the structure of this utility model;

[0012] Figure 2 for Figure 1 A partial sectional view from the side;

[0013] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0014] Figure 4 for Figure 2 Enlarged view of section B. In the diagram: 1. Cable tray, 2. Guardrail top bar, 3. Guardrail stop bar, 4. Rack plate, 5. Toothed post, 6. Rotating rod, 7. Vertical groove, 8. Rubber sleeve, 9. Bellows cover, 10. Sleeve plate, 11. Motor, 12. First bevel gear, 13. Second bevel gear, 14. Support plate, 15. Baffle plate, 16. Guard plate. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0016] Please see Figures 1-4This utility model provides a technical solution: a multi-beam safety guardrail for a bridge crane, including a bridge frame 1. Guardrail top bars 2 are provided on both sides of the upper part of the bridge frame 1. Multiple guardrail stops 3 are fixedly connected to the bottom end of the guardrail top bars 2. The guardrail stops 3 are connected to the bridge frame 1 via a connecting assembly. The connecting assembly includes: a rack plate 4, which is vertically fixed inside the central guardrail stop 3. A toothed column 5 is meshed with the front side of the rack plate 4. A rotating rod 6 is fixedly connected to the inner wall of the toothed column 5. The rotating rod 6 passes through the guardrail stop 3 via a vertical groove 7. Rubber sleeves 8 are fitted on both sides of the outer wall of the rotating rod 6. 8 is abutted against the guardrail bar 3. The outside of the vertical groove 7 is provided with a bellows cover 9, which is fixedly connected to the guardrail bar 3. The outer wall of the guardrail bar 3 is fitted with a sleeve plate 10, which is fixedly connected to the contact surface of the cable tray 1. The top of the inside of the cable tray 1 is fixedly connected to a motor 11. The output shaft of the motor 11 is fixedly connected to a first bevel gear 12. The bottom of the first bevel gear 12 is meshed with a second bevel gear 13. The inner wall of the second bevel gear 13 is fixedly connected to the rotating rod 6. The two sides of the top of the inside of the cable tray 1 are fixedly connected to support plates 14, which are rotatably connected to the rotating rod 6 through ball bearings.

[0017] In the specific implementation process, it is worth noting that the bridge frame 1 is the bridge frame structure in the bridge crane. Two guardrail top rods 2 are symmetrically distributed above the bridge frame 1. The guardrail top rods 2 can be fixedly connected to multiple guardrail stops 3 by fixing bolts. Through the transmission of the connecting components, the guardrail top rods 2 and guardrail stops 3 can be adjusted up and down. In addition, the transmission meshing point will not be affected by external factors to reduce the stable operation state, and the overall cost of the structure can be reduced. The two sides of the bridge frame are relatively simple and elegant. The rotating rod 6 can slide up and down inside the vertical groove 7. The rubber sleeve 8 is made of rubber and has a certain degree of flexibility. The inner wall of the rubber sleeve 8 abuts against the outer wall of the rotating rod 6. The rubber sleeve 8 and the bellows The contact surface of the cover 9 is fixedly connected. The accordion cover is an external protective structure with a sliding groove. It looks like an accordion and is composed of multiple folding structures and a support frame. It usually uses high-temperature resistant and corrosion-resistant synthetic fiber or plastic materials as the folding structure, which has good impact resistance. The support frame at the end of the accordion cover 9 is fixedly connected to the guardrail bar 3. The rubber sleeve 8 is fixedly connected to the folding structure in the accordion cover 9. The accordion cover 9 can prevent external debris from entering the interior of the central guardrail bar 3 from the vertical groove 7. The motor 11 is a stepper motor with a self-locking function. The power line of the motor 11 is connected to the external power supply device line, which can provide the required power for its operation. The housing of the motor 11 is fixedly connected to the contact surface of the bridge 1.

[0018] Furthermore, the guardrail bar 3 has a square cross-section, and the outer wall of the guardrail bar 3 is fitted with the inner wall of the sleeve plate 10 with a clearance.

[0019] In the specific implementation process, it is worth noting that the sleeve 10 can slide and limit the guardrail bar 3, which facilitates the stable up and down sliding operation of the guardrail bar 3.

[0020] Furthermore, the lower surface of the cable tray 1 is provided with an opening, and a baffle 15 is provided below the opening. The baffle 15 is fixedly connected to the cable tray 1 by bolts.

[0021] In the specific implementation process, it is worth noting that the baffle 15 can cover and protect the opening, and the baffle 15 is detachable, so that maintenance and repair can be carried out through the opening to the internal structure of the cable tray 1.

[0022] Furthermore, a guard plate 16 is provided between the toothed column 5 and the cable tray 1. The guard plate 16 is rotatably connected to the rotating rod 6 through a sealed bearing, and the guard plate 16 is fixedly connected to the cable tray 1 by bolts.

[0023] In the specific implementation process, it is worth noting that the guard plate 16 can not only improve the stability of the rotating rod 6, but also block the gap between the rotating rod 6 and the cable tray 1, which can prevent external debris from entering the interior of the cable tray 1.

[0024] Working principle:

[0025] When the crane is not being maintained, the height of the guardrail top bar 2 can be lowered. When needed, the guardrail top bar 2 can be raised to maximize the use of the factory building. During this process, the motor 11 needs to be powered so that its output shaft and the first bevel gear 12 rotate counterclockwise. The first bevel gear 12 meshes with the second bevel gear 13, causing the second bevel gear 13, the rotating rod 6, and the toothed column 5 to rotate. After the toothed column 5 rotates, it will mesh with the toothed rack 4. Due to the fixed connection between the toothed rack 4 and the guardrail stop bar 3, and the sliding limit of the sleeve plate 10 on the guardrail stop bar 3, the guardrail stop bar 3 and the guardrail stop bar 3 can be connected. The guardrail top bar 2 moves downwards. When it is necessary to raise the guardrail stop bar 3 and the guardrail top bar 2, the output shaft of the drive motor 11 rotates clockwise. It is worth noting that motor 11 is a stepper motor with a self-locking function (stepper motors are commonly used motors with a self-locking function; the rotor of a stepper motor typically uses permanent magnets, and the rotor moves in steps by reversing the phase sequence. When the power is off, due to the action of the permanent magnets, the rotor of the stepper motor will remain in a certain position and has mechanical self-locking capability). The stepper motor can rotate in both directions, which can be achieved by changing the phase sequence of the input pulse sequence. Specifically, if the input pulse sequence follows the ABCD phase sequence, the stepper motor will rotate forward in the set direction; while changing the phase sequence of the pulse sequence to DCBA will cause the stepper motor to rotate in reverse. Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A multi-beam safety guardrail for a bridge crane, comprising a bridge frame (1), characterized in that: The cable tray (1) is provided with guardrail top bars (2) on both sides above. Multiple guardrail stops (3) are fixed to the bottom of the guardrail top bars (2). The guardrail stops (3) are connected to the cable tray (1) through a connecting assembly. The connecting assembly includes: a rack plate (4). The rack plate (4) is vertically fixed inside the central guardrail stop (3). The front side of the rack plate (4) is engaged with a toothed column (5). A rotating rod (6) is fixed to the inner wall of the toothed column (5). The rotating rod (6) passes through the guardrail stop (3) through a vertical groove (7). Rubber sleeves (8) are fitted on both sides of the outer wall of the rotating rod (6). The rubber sleeves (8) abut against the guardrail stop (3). The vertical groove (7) The outer side is provided with a bellows cover (9), which is fixedly connected to the guardrail bar (3). The outer wall of the guardrail bar (3) is fitted with a sleeve plate (10), which is fixedly connected to the contact surface of the cable tray (1). The top of the inside of the cable tray (1) is fixedly connected to a motor (11), and the output shaft of the motor (11) is fixedly connected to a first bevel gear (12). The bottom of the first bevel gear (12) is meshed with a second bevel gear (13). The inner wall of the second bevel gear (13) is fixedly connected to a rotating rod (6). The top of the inside of the cable tray (1) is fixedly connected to two sides with support plates (14), which are rotatably connected to the rotating rod (6) through ball bearings.

2. The multi-beam safety guardrail for a bridge crane according to claim 1, characterized in that: The guardrail bar (3) has a square cross-section, and the outer wall of the guardrail bar (3) is fitted with the inner wall of the sleeve plate (10) with a clearance.

3. A multi-beam safety guardrail for a bridge crane according to claim 1, characterized in that: The lower surface of the cable tray (1) is provided with an opening, and a baffle (15) is provided below the opening. The baffle (15) is fixedly connected to the cable tray (1) by bolts.

4. A multi-beam safety guardrail for a bridge crane according to claim 1, characterized in that: A guard plate (16) is provided between the toothed column (5) and the cable tray (1). The guard plate (16) is rotatably connected to the rotating rod (6) through a sealed bearing. The guard plate (16) is fixedly connected to the cable tray (1) by bolts.

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