Bridge and portal crane hoisting mechanism

Abstract

The utility model discloses a bridge portal crane hoisting mechanism, including balance disc, the balance disc top is provided with the traction rope subassembly, the balance disc bottom is provided with the mounting block, the mounting block bottom is provided with the recess, the mounting block recess top center area is provided with the fixed post, the fixed post bottom is provided with the auxiliary assembly, the fixed post bottom is slidably connected with the connecting block through the auxiliary assembly, the connecting block bottom is provided with the hook, the connecting block outside is provided with the sliding mechanism, the connecting block outside is connected with the mounting block recess top through the sliding mechanism, the double buffering design of auxiliary assembly and sliding mechanism, effectively reduce the problem of the component damage due to inertia collision, through the elastic deformation and the damping cooperation absorption inertia force, avoid the damage of rigid collision to mounting block, connecting block and the damage of the hook.

Description

Technical Field

[0001] This utility model relates to the field of crane technology, and more specifically, to a hoisting mechanism for a bridge crane. Background Technology

[0002] As a core handling equipment in industrial production, port loading and unloading, warehousing and logistics, bridge cranes play a crucial role in lifting heavy objects through their hoisting mechanism, which directly determines the equipment's operating efficiency and safety. The hoisting mechanism typically consists of a balance disc, a traction rope assembly, a hook, and transmission components. During operation, the balance disc is pulled by the traction rope assembly, which in turn drives the bottom hook to achieve the vertical lifting and lowering of the heavy object. The stability and limit safety of the hook lifting process are the core prerequisites for ensuring the long-term reliable operation of the equipment.

[0003] An existing bridge crane hoisting mechanism has been found to have the following issues during use: 1. When the hook lifts the load to the top limit position, the control system issues a stop signal, but due to factors such as the elastic deformation of the traction rope, the delay of motor braking, and the inertia of the load, the hook cannot stop immediately and will continue to move a distance in the upward direction. This will cause the top connecting parts of the hook to collide hard with the top limit structure of the crane. After long-term use, this will cause fatigue damage to the traction rope assembly, deformation of the balance disc, and even failure of the limit switch, resulting in poor practicality.

[0004] 2. Existing devices often include spring buffers, but these are directly exposed to the crane's working environment. After prolonged use, accidents may occur, causing scraping and significantly reducing the buffering effect, thus resulting in poor practicality. Utility Model Content

[0005] (a) Technical problems to be solved In view of the problems existing in the prior art, this utility model provides a lifting mechanism for a bridge crane to solve the technical problem mentioned in the background art that the top of the hook is prone to collision due to inertia when it stops.

[0006] (II) Technical Solution To achieve the above objectives, this utility model provides the following technical solution: a lifting mechanism for a bridge crane, comprising a balance disc, a traction rope assembly at the top of the balance disc, an installation block at the bottom of the balance disc, a groove at the bottom of the installation block, a fixing column at the center of the top of the groove, an auxiliary component at the bottom of the fixing column, a connecting block slidably connected to the bottom of the fixing column through the auxiliary component, a hook at the bottom of the connecting block, a sliding mechanism on the outside of the connecting block, and the outside of the connecting block connected to the top of the groove of the installation block through the sliding mechanism.

[0007] The present invention is further configured such that the sliding mechanism includes four sets of first springs, four sets of sliding grooves are evenly arranged on the top of the mounting block groove, a sliding rod is slidably arranged in each of the four sets of mounting block sliding grooves, a slider is slidably fitted on the outer side of each of the four sets of sliding rods, and the top of each of the four sets of sliders is slidably connected to a corresponding set of mounting block sliding grooves, a first spring is fitted on one end of each of the four sets of sliding rods, and one end of each of the four sets of first springs is connected to one end of the corresponding mounting block sliding groove, and the other end of each of the four sets of first springs is connected to one end of the corresponding slider, and a hinge assembly is provided at the bottom of each of the four sets of sliders. The bottom of each slider is hinged to one end of the connecting block via the hinge assembly; four sets of first springs are evenly distributed on the top of the mounting block groove, achieving multi-directional uniform buffering through synchronous compression and reset, avoiding the problems of poor buffering effect and local component damage caused by uneven force distribution of existing single buffer components, improving the efficiency of inertial force absorption, ensuring that the connecting block rises smoothly without violent shaking, and the sliding cooperation between the slide rod and the slider provides precise guidance for the compression and reset of the first spring, avoiding the spring jamming caused by slider deviation, ensuring a continuous buffering process without interruption, and further ensuring the safety of the lifting mechanism when it stops.

[0008] The present invention is further configured such that the hinge assembly includes four sets of support rods, and the outer side of the fixed column is evenly hinged to one end of the four sets of support rods through hinge members. The bottom of each of the four sets of sliders is hinged to the other end of the corresponding set of support rods through hinge members. The support rods convert the vertical inertial force of the connecting block into the lateral sliding force of the slider, realizing the conversion of the force direction. This allows the first spring to efficiently absorb energy through lateral compression, ensuring that the inertial force is quickly absorbed and reducing the inertial upward distance of the connecting block. The four sets of support rods are evenly distributed on the outer side of the fixed column, transmitting force synchronously, ensuring that the slider and the first spring are subjected to uniform force, avoiding unilateral tilting of the connecting block, and further improving the stability of the buffering process.

[0009] The present invention is further configured such that the auxiliary component includes a second spring, the top of the connecting block is provided with a groove, and the bottom of the outer side of the fixing post slides tightly against the inner wall of the groove of the connecting block, and the bottom of the groove of the connecting block is connected to the bottom of the second spring, the top of the second spring is connected to the bottom of the fixing post, and a damping rod is fitted inside the second spring, the top of the damping rod is connected to the bottom of the fixing post, and the bottom of the damping rod is connected to the bottom of the groove of the connecting block; the synergistic effect of the second spring and the damping rod is to efficiently absorb inertial force through the spring and to suppress the rapid compression and rebound of the spring through the damping rod, avoiding the secondary impact problem of rebound that is easy to occur in the existing single spring buffer, further protecting the connecting block, the fixing post and the mounting block, reducing the risk of component damage, and the sliding cooperation between the fixing post and the groove of the connecting block provides precise guidance for the compression and reset of the second spring and the damping rod, avoiding the uneven force on the spring and the jamming of the damping rod caused by the displacement of the connecting block, ensuring the stability of the buffer function of the auxiliary component.

[0010] The present invention is further configured such that guide grooves are provided at both ends of the mounting block groove, and first guide blocks are slidably disposed in both sets of mounting block guide grooves. An annular plate is provided on the outer side of the connecting block, and the front and rear ends of the annular plate are connected to the other end of the corresponding set of first guide blocks. The cooperation between the first guide blocks and the guide grooves provides stable vertical guidance for the connecting block, preventing the connecting block from shifting forward or backward during buffering or lifting, ensuring that the auxiliary components and sliding mechanism can accurately transmit and absorb inertial forces, and improving the buffering effect.

[0011] The present invention is further configured such that sliding grooves are provided at both ends of the connecting block groove, and second guide blocks are slidably arranged in both sets of connecting block sliding grooves, and the bottom of the left and right ends of the fixed column is connected to the other end of the corresponding set of second guide blocks; the cooperation between the second guide blocks and the connecting block sliding grooves provides precise lateral limiting for the relative sliding of the fixed column and the connecting block, ensuring that the buffering force of the auxiliary component is evenly distributed and improving the longitudinal buffering effect.

[0012] The present invention is further configured such that an annular sealing gasket is provided on the outer side of the annular plate, and the outer side of the annular sealing gasket slides tightly against the inner wall of the mounting block groove; the sealing effect of the annular sealing gasket effectively prevents dust, oil, and metal debris from entering the mounting block groove, reducing maintenance frequency and cost.

[0013] (III) Beneficial Effects Compared with the prior art, this utility model provides a hoisting mechanism for a bridge crane, which has the following advantages: 1. The dual buffer design of auxiliary components and sliding mechanism solves the problem of component damage caused by inertial collision when the top of the hook of the existing hoisting mechanism stops. Through the synergistic absorption of inertial force by elastic deformation and damping, it avoids damage to the mounting block, connecting block and hook by hard collision. The built-in connection structure between the connecting block and the mounting block hides the buffer components such as auxiliary components and sliding mechanism in the groove of the mounting block, and does not expose them to the external environment, avoiding dust, oil stains and external force scratches. It solves the defect of the existing external buffer mechanism that is easily damaged, and reduces the frequency and cost of maintenance. The balance disc forms a stable force transmission link through the mounting block, fixed column and connecting block. The tension of the traction rope assembly is evenly distributed to each component, avoiding deformation caused by local force concentration. It ensures that the hook remains stable when suspending heavy objects and improves the safety of hoisting operations. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of a lifting mechanism for a bridge gantry crane according to the present invention; Figure 2 This is a three-dimensional structural diagram of the bottom structure of the hoisting mechanism of a bridge crane according to the present invention; Figure 3This is a three-dimensional schematic diagram of the internal cross-sectional structure of the hoisting mechanism of a bridge crane according to the present invention. Figure 4 This is a three-dimensional structural diagram showing the connection relationship of the sliding mechanism of this utility model; Figure 5 This is a three-dimensional structural diagram showing the connection relationship between the connecting block, the second spring, the damping rod, and the fixing column of this utility model.

[0015] In the diagram: 1. Balance disc; 2. Traction rope assembly; 3. Mounting block; 4. Fixing post; 5. Connecting block; 6. Hook; 7. First spring; 8. Slide rod; 9. Slider; 10. Support rod; 11. Second spring; 12. Damping rod; 13. First guide block; 14. Annular plate; 15. Second guide block; 16. Annular sealing gasket. Detailed Implementation

[0016] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0017] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0018] In this utility model, unless otherwise stated, the orientations used, such as "up" and "down", usually refer to the direction shown in the accompanying drawings, or to the vertical, perpendicular, or gravitational direction; similarly, for ease of understanding and description, "left" and "right" usually refer to the left and right shown in the accompanying drawings; "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not used to limit this utility model.

[0019] Please see Figures 1-5 A lifting mechanism for a bridge gantry crane includes a balance disc 1, a traction rope assembly 2 at the top of the balance disc 1, an mounting block 3 at the bottom of the balance disc 1, a groove at the bottom of the mounting block 3, a fixing column 4 at the center of the top of the groove of the mounting block 3, an auxiliary assembly at the bottom of the fixing column 4, a connecting block 5 slidably connected to the bottom of the fixing column 4 through the auxiliary assembly, a hook 6 at the bottom of the connecting block 5, a sliding mechanism on the outside of the connecting block 5, and the outside of the connecting block 5 connected to the top of the groove of the mounting block 3 through the sliding mechanism.

[0020] In this embodiment, when the crane is lifting, the traction rope assembly 2 pulls the balance plate 1 upward, and the balance plate 1 drives the mounting block 3 at the bottom to rise synchronously. The mounting block 3 is connected to the connecting block 5 through the fixing column 4 and auxiliary components. The hook 6 at the bottom of the connecting block 5 suspends the heavy object and rises synchronously with the whole.

[0021] When the hook rises to the top and approaches the limit position, the control system issues a stop signal. Due to inertia, the hook will continue to move the connecting block 5 upward. At this time, the connecting block 5 moves relative to the top of the groove of the mounting block 3 through the outer sliding mechanism. The sliding mechanism absorbs part of the inertial impact force through the deformation of its own components. At the same time, the auxiliary component at the bottom of the fixed column 4 is squeezed by the connecting block 5. The auxiliary component further buffers the remaining inertial force through elastic deformation and damping. Under the dual action, the rising speed of the connecting block 5 is slowed down, avoiding a hard collision between the connecting block 5 and the top of the groove of the mounting block 3. When the inertial force is completely dissipated, the auxiliary component and the sliding mechanism reset synchronously, pushing the connecting block 5 back to the initial position, and the hook stops rising.

[0022] More specifically, when the hook rises due to inertia, the connecting block 5 moves upward, and the inner wall of the groove at the top of the connecting block 5 slides along the bottom of the outer side of the fixed column 4. The bottom of the groove of the connecting block 5 gradually approaches the bottom of the fixed column 4, compressing the second spring 11 inside the groove. The second spring 11 absorbs part of the inertial impact force through elastic deformation. At the same time, the damping rod 12 fitted inside the spring is compressed synchronously. The damping rod 12 uses its own damping characteristics to slow down the compression speed of the second spring 11, avoiding the hard impact caused by the rapid compression of the spring, making the rising process of the connecting block 5 smoother. When the inertial force dissipates, the second spring 11 releases elastic potential energy, pushing the connecting block 5 to return to its original position. The damping rod 12 extends synchronously, slowing down the rebound speed of the spring, avoiding the connecting block 5 from rising or swaying again due to the spring rebounding too quickly, ensuring that the connecting block 5 returns to its initial position smoothly.

[0023] Please see Figure 1 and Figure 4 As one embodiment of the sliding mechanism: the sliding mechanism includes four sets of first springs 7, four sets of sliding grooves are evenly arranged on the top of the groove of the mounting block 3, and sliding rods 8 are slidably arranged in the four sets of sliding grooves of the mounting block 3. Sliding blocks 9 are slidably fitted on the outside of the four sets of sliding rods 8, and the top of the four sets of sliding blocks 9 are slidably connected to the corresponding set of sliding grooves of the mounting block 3. A first spring 7 is fitted on one end of the outside of the four sets of sliding rods 8, and one end of the four sets of first springs 7 is connected to one end of the corresponding sliding groove of the mounting block 3. The other end of the four sets of first springs 7 is connected to one end of the corresponding sliding block 9. A hinge assembly is provided at the bottom of the four sets of sliding blocks 9, and the bottom of the four sets of sliding blocks 9 is hinged to one end of the connecting block 5 through the hinge assembly.

[0024] Specifically, as the hook continues to rise due to inertia, the connecting block 5 moves upward and pushes the four sets of sliders 9 through the hinge assembly at the bottom. The top of the slider 9 slides along the four sets of grooves at the top of the mounting block 3, while the inner side of the slider 9 slides along the outer side of the slide rod 8. During the sliding process, the slider 9 gradually compresses the first spring 7 on the outer side of the slide rod 8. The first spring 7 absorbs the inertial impact force transmitted by the connecting block 5 through elastic deformation. The four sets of first springs 7 are compressed synchronously to ensure that the buffer force is evenly distributed and to avoid the connecting block 5 tilting due to force on one side. When the inertial impact force weakens, the first spring 7 releases elastic potential energy and pushes the slider 9 to slide in the opposite direction along the slide rod 8 and the groove. The slider 9 drives the connecting block 5 to return to its initial position through the hinge assembly, thus completing the buffering process.

[0025] Please refer to Figures 2-4 As a further embodiment of the sliding mechanism: the hinge assembly includes four sets of support rods 10, the outer side of the fixed column 4 is evenly hinged to one end of the four sets of support rods 10 through hinge members, and the bottom of the four sets of sliders 9 is hinged to the other end of the corresponding set of support rods 10 through hinge members.

[0026] Specifically, when the hook rises due to inertia and drives the connecting block 5 to move upward, the top of the connecting block 5 pushes the four sets of support rods 10 to move through the hinge. One end of the support rod 10 is hinged to the outside of the fixed column 4, and the other end is hinged to the bottom of the slider 9. When the connecting block 5 rises, the support rod 10 rotates around the hinge point of the fixed column 4, and at the same time pushes the slider 9 to slide along the slide rod 8 and the slide groove. The slider 9 slides and compresses the first spring 7 to realize the absorption of inertial force.

[0027] In summary, the overall equipment is in use (or running): When the crane is lifting, the traction rope assembly 2 pulls the balance disc 1 upward, and the balance disc 1 drives the bottom mounting block 3 to rise synchronously. The fixed column 4 in the groove of the mounting block 3 is connected to the connecting block 5 through the auxiliary assembly. The hook 6 at the bottom of the connecting block 5 suspends the heavy object and rises with the whole. When the hook rises to the top and continues to rise due to inertia, the connecting block 5 moves upward, and its inner wall of the groove slides along the outside of the fixed column 4, compressing the second spring 11 and damping rod 12 in the groove. The second guide blocks 15 at both ends of the fixed column 4 slide along the slide of the connecting block 5 to prevent the fixed column 4 from shifting.

[0028] Meanwhile, the connecting block 5 pushes four sets of support rods 10 through the bottom hinge assembly. The support rods 10 rotate around the fixed column 4 and push the slider 9. The top of the slider 9 slides along the groove of the mounting block 3 and the inner side slides along the slide rod 8, compressing the first spring 7 on the outer side of the slide rod 8. The outer annular plate 14 of the connecting block 5 drives the first guide block 13 to slide along the guide groove of the mounting block 3, ensuring that the connecting block 5 rises smoothly. The annular sealing gasket 16 on the outer side of the annular plate 14 always blocks impurities from entering the groove of the mounting block 3.

[0029] After the inertial force dissipates, the first spring 7 pushes the slider 9 to reset, and the connecting block 5 moves down through the support rod 10; the second spring 11 and the damping rod 12 reset synchronously, and the connecting block 5 returns to its initial position.

[0030] Of all the solutions mentioned above, those involving the connection between two components can be selected according to the actual situation, such as welding, bolt and nut connection, bolt or screw connection, or other known connection methods, which will not be elaborated here. For all the fixed connections mentioned above, welding is preferred. Although embodiments of this utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this utility model. The scope of this utility model is defined by the appended claims and their equivalents.

Claims

1. A hoisting mechanism for a bridge crane, comprising a balance disc (1), wherein a traction rope assembly (2) is disposed on the top of the balance disc (1), characterized in that: The balance disc (1) has a mounting block (3) at its bottom, a groove at its bottom, a fixing post (4) at the top center of the groove, an auxiliary component at its bottom, a connecting block (5) slidably connected to the bottom of the fixing post (4) via the auxiliary component, a hook (6) at its bottom, a sliding mechanism on the outside of the connecting block (5), and the outside of the connecting block (5) connected to the top of the groove of the mounting block (3) via the sliding mechanism.

2. The hoisting mechanism of a bridge crane according to claim 1, characterized in that: The sliding mechanism includes four sets of first springs (7), four sets of sliding grooves are evenly arranged on the top of the groove of the mounting block (3), and sliding rods (8) are slidably arranged in the four sets of sliding grooves of the mounting block (3). Sliding blocks (9) are slidably fitted on the outside of the four sets of sliding rods (8), and the top of the four sets of sliding blocks (9) are slidably connected to the corresponding set of sliding grooves of the mounting block (3). A first spring (7) is fitted on one end of the outside of the four sets of sliding rods (8), and one end of the four sets of first springs (7) is connected to one end of the corresponding sliding groove of the mounting block (3). The other end of the four sets of first springs (7) is connected to one end of the corresponding sliding block (9). A hinge assembly is provided at the bottom of the four sets of sliding blocks (9), and the bottom of the four sets of sliding blocks (9) is hinged to one end of the connecting block (5) through the hinge assembly.

3. The hoisting mechanism of a bridge crane according to claim 2, characterized in that: The hinge assembly includes four sets of support rods (10). The outer side of the fixed column (4) is evenly hinged to one end of the four sets of support rods (10) through hinges. The bottom of the four sets of sliders (9) is hinged to the other end of the corresponding set of support rods (10) through hinges.

4. The hoisting mechanism of a bridge crane according to claim 1, characterized in that: The auxiliary component includes a second spring (11), the top of the connecting block (5) is provided with a groove, and the bottom of the outer side of the fixing post (4) slides tightly against the inner wall of the groove of the connecting block (5), and the bottom of the groove of the connecting block (5) is connected to the bottom of the second spring (11), the top of the second spring (11) is connected to the bottom of the fixing post (4), and a damping rod (12) is fitted inside the second spring (11), the top of the damping rod (12) is connected to the bottom of the fixing post (4), and the bottom of the damping rod (12) is connected to the bottom of the groove of the connecting block (5).

5. The hoisting mechanism of a bridge crane according to claim 1, characterized in that: The mounting block (3) has guide grooves at both ends of the groove. The two sets of mounting blocks (3) have first guide blocks (13) slidably arranged in the guide grooves. The connecting block (5) has an annular plate (14) on its outer side. The annular plate (14) is connected to the other end of the corresponding set of first guide blocks (13) at both ends of the front and rear.

6. The hoisting mechanism of a bridge crane according to claim 4, characterized in that: The connecting block (5) has a sliding groove at both ends of the groove. The two sets of connecting blocks (5) have a second guide block (15) slidably installed in the sliding groove. The bottom of the left and right ends of the fixing column (4) is connected to the other end of the corresponding set of second guide blocks (15).

7. The hoisting mechanism of a bridge crane according to claim 5, characterized in that: An annular sealing gasket (16) is provided on the outer side of the annular plate (14), and the outer side of the annular sealing gasket (16) slides tightly against the inner wall of the groove of the mounting block (3).

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