Anti-swing bridge crane

Abstract

The present application relates to the technical field of hoisting machinery, in particular to a swing-preventing bridge crane. The swing-preventing bridge crane comprises a double-beam bridge, a trolley, an electric hoist and a swing-preventing mechanism. The trolley is arranged on the double-beam bridge, the electric hoist is arranged at the bottom of the trolley, and the swing-preventing mechanism is connected with the electric hoist. The swing-preventing mechanism comprises a cross, a first sprocket and a swing-preventing chain. The cross is connected with the pulley carrier of the electric hoist. Four first sprockets are arranged around the electric hoist at the bottom of the trolley, and the four first sprockets correspond to the four ends of the cross one by one. The swing-preventing chain is arranged on the first sprocket. One end of the swing-preventing chain is connected with the corresponding end of the cross, and the other end is connected with the trolley through a support. The radial extension axis of the first sprocket intersects with the central extension line of the trolley. The swing-preventing bridge crane provided by the present application does not need to occupy the space above, can reduce the height requirement of the factory building, reduce the construction cost of the factory building and improve the adaptability.

Description

Technical Field

[0001] This invention relates to the field of lifting machinery technology, and in particular to an anti-sway bridge crane. Background Technology

[0002] A bridge crane is a lifting device that spans across workshops, warehouses, and material yards for material handling. Its two ends rest on tall concrete pillars or metal supports, resembling a bridge. The bridge frame of the bridge crane runs longitudinally along tracks laid on elevated structures on both sides, while the lifting trolley runs laterally along tracks laid on the bridge frame, thus forming a rectangular working area. This allows for full utilization of the space beneath the bridge frame for material handling, without obstruction from ground equipment.

[0003] After a bridge crane lifts materials vertically, the winch rope still retains a certain vertical length. When moving horizontally, the weight at the end of the rope can cause it to swing due to inertia, posing a significant safety hazard. Current technology requires a certain amount of space above the bridge crane in the factory building to accommodate the limiting structure and prevent rope swinging. This structure requires a high factory building height, increasing construction costs and exhibiting poor adaptability. Summary of the Invention

[0004] The purpose of this invention is to provide an anti-sway bridge crane to alleviate the problems of existing bridge crane structures having high requirements for factory building height, increasing factory building construction costs, and poor adaptability.

[0005] To solve the above-mentioned technical problems, the technical solution provided by the present invention is as follows: An anti-sway bridge crane includes: a double-girder bridge frame, a lifting trolley, an electric hoist, and an anti-sway mechanism. The lifting trolley is mounted on the double-girder bridge frame, the electric hoist is mounted at the bottom of the lifting trolley, and the anti-sway mechanism is connected to the electric hoist. The anti-sway mechanism includes a cross, a first sprocket, and an anti-sway chain. The cross is connected to the pulley frame of the electric hoist. The bottom of the lifting trolley is provided with four first sprockets around the electric hoist, and the four first sprockets correspond one-to-one with the four ends of the cross. The anti-sway chain is provided on the first sprocket. One end of the anti-sway chain is connected to the corresponding end of the cross, and the other end is connected to the lifting trolley through a support. The radial extension axis of the first sprocket intersects the center extension line of the lifting trolley.

[0006] Furthermore, a limiting mechanism is provided between the first sprocket and the anti-sway chain.

[0007] Furthermore, the limiting mechanism includes guide wheels and positioning guide rails. The positioning guide rails are fixedly installed on the mounting bracket of the first sprocket. Multiple guide wheels are provided, and the multiple guide wheels are evenly spaced on the anti-sway chain.

[0008] Furthermore, a first counterweight is provided on the anti-sway chain between the support and the first sprocket.

[0009] Furthermore, the upper end of the first counterweight is provided with a fixing frame, and a second sprocket that cooperates with the anti-sway chain is installed on the fixing frame.

[0010] Furthermore, a gantry frame is installed on the double beam bridge, the gantry frame is connected to a frame, the frame is equipped with a pulling mechanism, the two ends of the lifting trolley are respectively equipped with movable pulleys, the two ends of the double beam bridge are respectively fixedly equipped with fixed pulleys, and pull ropes are wound on the movable pulleys, the fixed pulleys and the pulling mechanism.

[0011] Furthermore, the pulling mechanism includes a reduction gearbox, a reduction motor, two rollers, and two tensioning wheels. The reduction gearbox is mounted on the frame and is equipped with a reduction motor that drives its input end to rotate. The reduction gearbox has two output ends, which respectively drive the two rollers to rotate. The pull rope is wound around the two rollers, and the two tensioning wheels are respectively fixedly mounted on the gantry frame and are used to tension the pull rope in front of and behind the rollers.

[0012] Furthermore, the gantry is equipped with rubber rollers, which are connected to the gantry via an adjustment mechanism.

[0013] Furthermore, the adjustment mechanism includes a slide, a long slot, a screw, a spring, and a nut. The slide is rotatably mounted on both ends of the rubber roller shaft. The gantry frame is provided with a long slot that corresponds to and cooperates with the slide. The screw is provided on the slide and located in the long slot. The spring and the nut are arranged sequentially from top to bottom on the screw below the slide.

[0014] Furthermore, each of the four branches of the cross is fixedly connected to a second counterweight by bolts.

[0015] This invention can bring at least the following beneficial effects: The anti-sway bridge crane provided by the present invention includes: a double-girder bridge frame, a lifting trolley, an electric hoist, and an anti-sway mechanism. The lifting trolley is disposed on the double-girder bridge frame, the electric hoist is disposed at the bottom of the lifting trolley, and the anti-sway mechanism is connected to the electric hoist. The anti-sway mechanism includes a cross, a first sprocket, and an anti-sway chain. The cross is connected to the pulley frame of the electric hoist. Four first sprockets are provided around the bottom of the lifting trolley around the electric hoist, and the four first sprockets correspond one-to-one with the four ends of the cross. The anti-sway chain is provided on the first sprocket. One end of the anti-sway chain is connected to the corresponding end of the cross, and the other end is connected to the lifting trolley through a support. The radial extension axis of the first sprocket intersects the center extension line of the lifting trolley.

[0016] During operation, the anti-sway bridge crane activates the electric hoist, causing its pulleys and hooks to move upwards for lifting, simultaneously moving the crossbeam upwards. As the crossbeam moves upwards, the two anti-sway chains on the left and right can only bend and deform freely in the left-right direction, preventing bending and deformation in the front-back direction, thus achieving anti-sway limiting in the front-back direction; similarly, the two anti-sway chains on the front and back can only bend and deform freely in the front-back direction, preventing bending and deformation in the left-right direction, thus achieving anti-sway limiting in the left-right direction. The anti-sway chains and the first sprocket do not require overhead space, reducing the height requirement for the factory compared to existing technologies, lowering construction costs, and improving adaptability.

[0017] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the specific embodiments or related technologies of the present invention, the drawings used in the description of the specific embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0019] Figure 1 This is an overall schematic diagram of the anti-sway bridge crane provided in an embodiment of the present invention; Figure 2 This is a top view of a portion of the structure of an anti-sway bridge crane provided in an embodiment of the present invention; Figure 3 for Figure 1 A magnified view of a section at point A in the middle; Figure 4 This is a side view of a portion of the structure of the pulling mechanism provided in an embodiment of the present invention.

[0020] icon: 1-Double beam bridge; 2-Lifting trolley; 3-Electric hoist; 4-First sprocket; 5-Anti-sway chain; 6-Cross; 7-First counterweight; 8-Support; 9-Radial extension axis; 10-Center extension line; 11-Guide wheel; 12-Fixed frame; 13-Second sprocket; 14-Gantry frame; 15-Pulling mechanism; 16-Moving pulley; 17-Fixed pulley; 18-Pull rope; 19-Rubber roller; 41-Mounting frame; 42-Positioning guide rail; 110-Slide; 111-Long slot; 112-Screw; 113-Spring; 114-Nut; 115-Second counterweight; 116-Frame; 151-Roller; 152-Gear motor; 153-Tensioning wheel; 154-Gearbox. Detailed Implementation

[0021] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. 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.

[0022] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0023] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Physical quantities in formulas, unless otherwise specified, should be understood as basic quantities in the International System of Units (SI), or derived quantities derived from basic quantities through mathematical operations such as multiplication, division, differentiation, or integration.

[0024] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0025] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0026] The following detailed description of some embodiments of the present invention is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features described herein can be combined with each other.

[0027] Example 1 After a bridge crane lifts materials vertically, the winch rope still retains a certain vertical length. When moving horizontally, the weight at the end of the rope can cause it to swing due to inertia, posing a significant safety hazard. Current technology requires a certain amount of space above the bridge crane in the factory building to accommodate the limiting structure and prevent rope swinging. This structure requires a high factory building height, increasing construction costs and exhibiting poor adaptability.

[0028] In view of this, the present invention provides an anti-sway bridge crane, including: a double-girder bridge frame 1, a lifting trolley 2, an electric hoist 3, and an anti-sway mechanism. The lifting trolley 2 is disposed on the double-girder bridge frame 1, the electric hoist 3 is disposed at the bottom of the lifting trolley 2, and the anti-sway mechanism is connected to the electric hoist 3. The anti-sway mechanism includes a cross 6, a first sprocket 4, and an anti-sway chain 5. The cross 6 is connected to the pulley frame of the electric hoist 3. The bottom of the lifting trolley 2 is provided with four first sprockets 4 around the electric hoist 3, and the four first sprockets 4 correspond one-to-one with the four ends of the cross 6. The first sprocket 4 is provided with an anti-sway chain 5. One end of the anti-sway chain 5 is connected to the corresponding end of the cross 6, and the other end is connected to the lifting trolley 2 through a support 8. The radial extension axis 9 of the first sprocket 4 intersects with the center extension line 10 of the lifting trolley 2.

[0029] During operation, the anti-sway bridge crane starts the electric hoist 3, causing the pulley and hook on the electric hoist 3 to move upwards for lifting, simultaneously moving the crossbar 6 upwards. The anti-sway chain 5 uses a double-row roller chain. During the upward movement of the crossbar 6, see... Figure 2The two anti-sway chains 5 on the left and right can only be bent and deformed freely in the left and right directions, but not in the front and back directions, thus achieving anti-sway limiting in the front and back directions; the two anti-sway chains 5 on the front and back can only be bent and deformed freely in the front and back directions, but not in the left and right directions, thus achieving anti-sway limiting in the left and right directions. The anti-sway chains 5 and the first sprocket 4 do not require space above, which, compared with existing technologies, reduces the height requirements of the factory building, reduces factory construction costs, and improves adaptability.

[0030] In an optional embodiment, a limiting mechanism is provided between the first sprocket 4 and the anti-sway chain 5.

[0031] The limiting mechanism can enhance the stability of the connection between the first sprocket 4 and the anti-sway chain 5, and further improve the reliability of the anti-sway limiting.

[0032] Specifically, the limiting mechanism includes guide wheels 11 and positioning guide rails 42. The positioning guide rails 42 are fixedly installed on the mounting bracket 41 of the first sprocket 4. There are multiple guide wheels 11, and the multiple guide wheels 11 are evenly spaced on the anti-sway chain 5.

[0033] See Figure 3 The guide wheel 11 is engaged with the positioning guide rail 42, allowing the guide wheel 11 to slide along the positioning guide rail 42. The positioning guide rail 42 is fixed to the mounting bracket 41 of the first sprocket 4 by a fastener. Multiple guide wheels 11 are spaced apart on the anti-sway chain 5, thereby achieving a stable and reliable connection between the first sprocket 4 and the anti-sway chain 5.

[0034] In an optional embodiment, a first counterweight 7 is provided on the anti-sway chain 5 between the support 8 and the first sprocket 4.

[0035] See Figure 1 During the upward movement of the cross 6, the first counterweight 7 pulls the corresponding anti-sway chain 5, which can prevent the anti-sway chain 5 from becoming loose, thereby ensuring the anti-sway limiting function of the anti-sway chain 5.

[0036] In an optional embodiment, the upper end of the first counterweight 7 is provided with a fixing frame 12, and a second sprocket 13 that cooperates with the anti-sway chain 5 is installed on the fixing frame 12.

[0037] See Figure 1 The fixing frame 12 can be a U-shaped frame, and the second sprocket 13 is installed at the U-shaped opening of the fixing frame 12. A limit mechanism is also provided between the second sprocket 13 and the anti-sway chain 5. The specific structure of the limit mechanism can be the same as the limit mechanism between the first sprocket 4 and the anti-sway chain 5, thereby improving the reliability of the anti-sway limit.

[0038] In an optional embodiment, a gantry 14 is installed on the double beam bridge 1, the gantry 14 is connected to a frame 116, the frame 116 is provided with a pulling mechanism 15, the two ends of the lifting trolley 2 are respectively provided with movable pulleys 16, the two ends of the double beam bridge 1 are respectively fixedly provided with fixed pulleys 17, and pull ropes 18 are wound on the movable pulleys 16, fixed pulleys 17 and pulling mechanism 15.

[0039] See Figure 1 The pulling mechanism 15 includes a reduction gearbox 154, a reduction motor 152, two rollers 151, and two tensioning wheels 153. The reduction gearbox 154 is mounted on the frame 116. The reduction gearbox 154 is equipped with a reduction motor 152 that drives its input end to rotate. The reduction gearbox 154 has two output ends, which respectively drive the two rollers 151 to rotate. The pull rope 18 is wound around the two rollers 151. The two tensioning wheels 153 are respectively fixedly installed on the gantry frame 14 and are used to tension the pull rope 18 in front of and behind the rollers 151.

[0040] In this embodiment, when it is necessary to move the hoisted object to the left, the reduction motor 152 is started, which drives the roller 151 to rotate clockwise through the reduction gearbox 154. The roller 151 pulls the pull rope 18 to the right. Since the pull rope 18 is wound clockwise around the roller 151 from left to right, the roller 151 unwinds while winding the pull rope 18. The pull rope 18 drives the lifting trolley 2 to move to the left through the fixed pulley 17 on the left, thereby realizing the movement of the hoisted object to the left. Similarly, when it is necessary to move the hoisted object to the right, the reduction motor 152 is started, which drives the roller 151 to rotate counterclockwise through the reduction gearbox 154. The roller 151 pulls the pull rope 18 to the left. The pull rope 18 drives the lifting trolley 2 to move to the right through the fixed pulley 17 on the right, thereby realizing the movement of the hoisted object to the right.

[0041] By coordinating the pulling mechanism 15, the movable pulley 16, the fixed pulley 17, and the pull rope 18, the reciprocating motion of the lifting trolley 2 is achieved while the pulling effort is reduced, the power requirement for the reduction motor 152 is decreased, and the overall operation is stable.

[0042] In an optional embodiment, a rubber roller 19 is provided on the gantry frame 14, and the rubber roller 19 is connected to the gantry frame 14 through an adjustment mechanism.

[0043] The rubber roller 19 can further tighten the pull rope 18 wound on the roller 151 to prevent slippage.

[0044] For details, see Figure 1 and Figure 4The adjusting mechanism includes a slide block 110, a long slot 111, a screw 112, a spring 113, and a nut 114. Slide blocks 110 are rotatably mounted on both ends of the rubber roller 19. The gantry frame 14 has long slots 111 that correspond to the slide blocks 110. A screw 112, located within the long slot 111, passes through the slide block 110. Below the slide block 110, the screw 112 is sequentially fitted with a spring 113 and a nut 114 from top to bottom. The adjusting mechanism allows for adjustment of the clamping force of the rubber roller 19.

[0045] In an optional embodiment, each of the four branches of the cross 6 is fixedly connected with a second counterweight 115 by bolts.

[0046] See Figure 1 The second counterweight 115 can improve the stability of the upward movement of the cross 6 and ensure a smooth lifting process.

[0047] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An anti-sway bridge crane, characterized in that, include: The system includes a double-beam cable tray, a lifting trolley, an electric hoist, and an anti-sway mechanism. The lifting trolley is mounted on the double-beam cable tray, the electric hoist is mounted at the bottom of the lifting trolley, and the anti-sway mechanism is connected to the electric hoist. The anti-sway mechanism includes a cross, a first sprocket, and an anti-sway chain. The cross is connected to the pulley frame of the electric hoist. The bottom of the lifting trolley is provided with four first sprockets around the electric hoist, and the four first sprockets correspond one-to-one with the four ends of the cross. The anti-sway chain is provided on the first sprocket. One end of the anti-sway chain is connected to the corresponding end of the cross, and the other end is connected to the lifting trolley through a support. The radial extension axis of the first sprocket intersects the center extension line of the lifting trolley.

2. The anti-sway bridge crane according to claim 1, characterized in that, A limit mechanism is provided between the first sprocket and the anti-sway chain.

3. The anti-sway bridge crane according to claim 2, characterized in that, The limiting mechanism includes guide wheels and positioning guide rails. The positioning guide rails are fixedly installed on the mounting frame of the first sprocket. There are multiple guide wheels, which are evenly spaced on the anti-sway chain.

4. The anti-sway bridge crane according to claim 1, characterized in that, A first counterweight is provided on the anti-sway chain between the support and the first sprocket.

5. The anti-sway bridge crane according to claim 4, characterized in that, The upper end of the first counterweight is provided with a fixing frame, and a second sprocket that cooperates with the anti-sway chain is installed on the fixing frame.

6. The anti-sway bridge crane according to claim 1, characterized in that, A gantry frame is installed on the double beam bridge, the gantry frame is connected to a frame, the frame is equipped with a pulling mechanism, the two ends of the lifting trolley are respectively equipped with movable pulleys, the two ends of the double beam bridge are respectively fixedly equipped with fixed pulleys, and the movable pulleys, the fixed pulleys and the pulling mechanism are wound with pull ropes.

7. The anti-sway bridge crane according to claim 6, characterized in that, The pulling mechanism includes a reduction gearbox, a reduction motor, two rollers, and two tensioning wheels. The reduction gearbox is mounted on the frame and is equipped with a reduction motor that drives its input end to rotate. The reduction gearbox has two output ends, which respectively drive the two rollers to rotate. The pull rope is wound around the two rollers, and the two tensioning wheels are respectively fixedly mounted on the gantry frame and are used to tension the pull rope in front of and behind the rollers.

8. The anti-sway bridge crane according to claim 6, characterized in that, The gantry frame is equipped with rubber rollers, which are connected to the gantry frame via an adjustment mechanism.

9. The anti-sway bridge crane according to claim 8, characterized in that, The adjustment mechanism includes a slide, a long slot, a screw, a spring, and a nut. The slide is rotatably mounted on both ends of the rubber roller shaft. The gantry frame is provided with a long slot that corresponds to the slide. The screw is inserted through the long slot on the slide. The spring and the nut are arranged sequentially from top to bottom on the screw below the slide.

10. The anti-sway bridge crane according to claim 1, characterized in that, Each of the four branches of the cross is fixedly connected to a second counterweight by bolts.

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