A lifting trolley suitable for large bridge cranes

Abstract

The present invention discloses a lifting trolley suitable for large bridge cranes, which belongs to the technical field of lifting machinery. The present invention modularizes the lifting mechanism and adopts a double-track form, which improves the force on the main beam, makes the force reasonable, positions quickly, is easy to install, and is convenient for modular production. At the same time, it also greatly reduces the height and reduces the dead weight. The present invention modularizes the traveling mechanism trolley and utilizes the increase and decrease of the lifting mechanism modules and the rapid assembly of the lifting beam to flexibly assemble bridge cranes of different models and lifting ranges, thereby expanding the scope of use of the bridge crane and reducing the production cost. At the same time, the present invention does not have an integral frame. The installation skeleton of the present invention is composed of the connecting beam of the traveling mechanism trolley module and the lifting beam for hanging the lifting mechanism module. The structure is compact, the weight is light, and the installation space is large.

Description

Technical Field

[0001] The present invention belongs to the technical field of lifting machinery, and more specifically relates to a lifting trolley suitable for large bridge cranes. In addition to being applied to large bridge cranes (hereinafter referred to as bridge cranes), the present invention is also suitable for use on large gantry cranes or other similar lifting equipment. Background Art

[0002] Bridge crane is a kind of lifting equipment widely used in the lifting machinery industry. It is mainly used for equipment installation, lifting and assembly in factory workshops, power plant buildings and engineering construction. The lifting trolley is one of the main working mechanisms of the bridge crane. The lifting trolley consists of three major parts: the trolley travel mechanism, the trolley frame and the lifting mechanism. The general trolley structure of the lifting trolley in traditional large bridge cranes is as follows: Figure 1 、 Figure 2 and Figure 3 As shown: the traditional lifting mechanism (4') is located on the traditional trolley frame (8'), and the traditional trolley frame (8') is supported on the traditional walking trolley (1'). The traditional trolley frame (8') is an integral welded structure. The size of the traditional trolley frame (8') of a large bridge crane is often oversized, which brings difficulties to transportation. This traditional lifting trolley is heavy and high. The traditional walking trolleys (1') on both sides adopt a single-rail trolley form. Not only is the height of the traditional walking trolley (1') large, but the eccentric structure of the single guide rail (7') used in the corresponding main beam (6) is also not good at bearing force. In order to resist torsion, the width of the main beam (6) must be increased, thereby increasing the weight of the main beam.

[0003] At the same time, with the increase in large-scale construction projects and China's advancement in international construction, demand for large bridge cranes is also gradually increasing both domestically and internationally. However, large bridge cranes currently suffer from long production cycles, inconsistent technical specifications, and significant performance variations. To address these technical issues, modular design, processing, and assembly of key bridge crane components—such as the hoisting mechanism and traveling mechanism—are essential. This allows for rapid and flexible assembly of bridge cranes of varying sizes and lifting ranges, expanding their application and reducing production costs. Summary of the Invention

[0004] The purpose of the present invention is to address the deficiencies in the above-mentioned prior art and to provide a modular lifting trolley suitable for large bridge cranes. The present invention modularizes the lifting mechanism and adopts a double-track form, which improves the force on the main beam, makes the force reasonable, the positioning fast, the installation convenient, and facilitates modular production. At the same time, it also greatly reduces the height and reduces the dead weight. The present invention modularizes the walking mechanism trolley, and utilizes the increase and decrease of the lifting mechanism modules and the rapid assembly of the lifting beam to flexibly assemble bridge cranes of different models and lifting ranges, thereby expanding the scope of use of the bridge crane and reducing production costs.

[0005] The purpose of the present invention can be achieved by the following technical measures:

[0006] The present invention provides a lifting trolley suitable for a large bridge crane, comprising four traveling mechanism trolley modules symmetrically arranged on two main beams, two connecting beams overlapped above the two front and rear traveling mechanism trolley modules on the same side, a lifting beam horizontally overlapped above the center top of the two connecting beams (the two connecting beams and one lifting beam constitute the mounting frame of the present invention, and the four traveling mechanism trolley modules are connected as a whole through the mounting frame to form a complete traveling trolley), a plurality of lifting mechanism modules hung on both sides of the lifting beam, and a pulley block lifting system hung on the lower part of the lifting beam (the lifting beam in the mounting frame is also the installation base for the lifting mechanism modules and the pulley block lifting system);

[0007] The walking mechanism trolley module includes a cross-hinged axle box with a transverse axis and a longitudinal axis installed therein, which is installed at the two outer extended ends of the transverse axis, located on the left and right outer sides of the cross-hinged axle box, and supported on the double guide rails respectively. The driven wheel group and the driving wheel group are installed on the double guide rails (the driven wheel group, the cross-hinged axle box, and the driving wheel group are installed on the transverse axis in a side-by-side manner, which also greatly reduces the overall height of the trolley; the use of a double track form improves the stress on the main beam, and the web structure of the main beam does not need to bear additional torque. The double track structure can adopt a cross-hinged axle box structure with a simple structure and reasonable stress between the two wheel groups, which greatly reduces the volume and dead weight compared with the traditional trolley frame, and is also convenient for modular production), a drive shaft installed at the outer end of the driving wheel group in a cantilever manner, a drive device installed on the drive shaft (the drive device provides motion power, and the motion power is provided to the driving wheel group through the drive shaft), and a support positioned by the longitudinal axis and fixed above the cross-hinged axle box (only the front and rear ends of the connecting beam need to be respectively connected to the corresponding longitudinal axes in the front and rear two sets of trolley modules The support connection on the beam can realize the rapid assembly of one side of the lifting trolley; the two connecting beams are then connected by overlapping the lifting beam to form a complete walking trolley in the lifting trolley, and the correct position of all the running wheels in the four sets of walking mechanism trolley modules is quickly guaranteed, eliminating the trouble of manual vertical adjustment back and forth, and realizing rapid positioning and quick installation); the transverse axis and the longitudinal axis are arranged vertically and crosswise in the horizontal direction (the transverse axis and the longitudinal axis are perpendicular to each other, and the transverse axis is perpendicular to the guide rail and the longitudinal axis is parallel to the guide rail, and the support is positioned by the longitudinal axis, so after the support is connected by the connecting beam, the running wheels in the front and rear sets of walking mechanism trolley modules can achieve rapid self-positioning, and the running wheels in the four sets of walking mechanism trolley modules after the two connecting beams are overlapped by the lifting beam can also achieve rapid self-positioning), the distance between the two axis lines is less than the sum of the radii of the transverse axis and the longitudinal axis (that is, there is an overlapping part between the longitudinal axis and the transverse axis), and an arc-shaped groove for embedding the longitudinal axis is processed on the transverse axis (the longitudinal axis is embedded in the transverse axis groove to ensure that the transverse axis will not rotate or move left and right);

[0008] The lifting mechanism module includes a drum support and a drum of U-shaped frame structure (the drum is used to wind the lifting wire rope, and the drum support is the installation base of the drum), the right end of the drum is supported on the right vertical plate of the drum support through the drum support shaft, and the left end of the drum is supported on the left vertical plate of the drum support through the reducer embedded in the inner cavity of the drum (the two ends of the drum are mounted on the two end vertical plates of the drum support, and the drum and the reducer rotate synchronously; the reducer is built into the inner cavity of the drum, with a compact structure and greatly saving installation space), the reducer and the power unit are connected through a coupling I with a brake disc, a connecting shaft, and a coupling II (the connecting shaft and the coupling are splined and can be slightly retracted so that the stress deformation of the structure does not affect the power transmission, and the power output of the power unit is transmitted to the drum through the reducer); the power unit output shaft and the reducer output shaft on both sides of the coupling I are connected to the power unit through the reducer. Brakes are installed on the input shafts (used to control the power unit output shaft, reducer input shaft and drum to stop rotating, thereby stopping the wire rope from rising or falling in the height direction). A limit switch is connected to the outer end face of the drum support shaft (the limit switch is set to the extreme position on site: when the hook attachment is raised to the maximum height, the limit switch is activated to stop the drum from rotating and the hook attachment from rising; when the hook attachment is lowered to the point where only the last three safety circles of the drum are left to release the rope, the limit switch is activated to stop the drum from rotating and the hook attachment from descending). A horizontally extended pin hole plate is fixed to the upper part of the same side of the right and left vertical plates (after the pin shaft is installed, the lifting mechanism module and the lifting beam can be quickly positioned), and a flange plate with bolt holes is fixed to the lower part of the same side (after the bolt is installed, the lifting mechanism module and the lifting beam can be quickly connected and fixed).

[0009] The lifting beam is a box-type beam structure with an upper flange of a rectangular cross-section and a lower flange of a trapezoidal plate structure extending downward from the middle of the webs on both sides; a pin plate matching the pin hole plate is provided on the corresponding portion of the upper flange of the web (after the pin shaft is installed, the lifting mechanism module and the lifting beam can be quickly positioned); a flange hole plate matching the flange plate is provided on the web (after the bolts are installed, the lifting mechanism module and the lifting beam can be quickly connected and fixed); and an axial hole for installing the fixed pulley axle is processed on the corresponding portion of the lower flange of the web (the fixed pulley axle can be used to hang the fixed pulley assembly on the lower part of the lifting beam);

[0010] The pulley block lifting system is composed of a fixed pulley block, a fixed pulley axle, a movable pulley block, a movable pulley axle, a wire rope, and a hook accessory, wherein the fixed pulley block is hung on the corresponding part of the lower flange of the web of the lifting beam through the fixed pulley axle, the movable pulley block is hung below the fixed pulley block through the wire rope, and the hook accessory is hung below the movable pulley block.

[0011] The cross hinge box described in the present invention is a square box structure, with horizontal axis mounting holes symmetrically processed on the left and right side surfaces of the cross hinge box, and vertical axis mounting holes symmetrically processed on the front and rear end surfaces of the cross hinge box, and the vertical axis mounting holes are perpendicular to each other in the horizontal direction (ensuring that the vertical axis and the horizontal axis are horizontally perpendicular and cross-overlap).

[0012] The drive shaft in the present invention is a structure of a shaft end cover plus a cantilever extension shaft, and a matching hole for installing a shear screw is processed on the outer edge of the shaft end cover.

[0013] The support described in the present invention is composed of a horizontal flange plate and a vertical positioning rib plate. A positioning hole for the longitudinal axis is processed on the vertical positioning rib plate (the support is positioned by the longitudinal axis, and the longitudinal axis is parallel to the guide rail. After the support is connected by the connecting beam, the walking wheels in the front and rear two sets of walking mechanism trolley modules can achieve rapid self-positioning), and a connecting hole for fixing the connecting beam is processed on the horizontal flange plate (after installing the bolts, the connection between the connecting beam and the support can be realized).

[0014] The driving device described in the present invention is a three-in-one driving device which integrates a motor, a brake and a speed reducer.

[0015] The double guide rails described in the present invention are laid on the corresponding parts of the webs on both sides of the main beam (the use of double rails improves the stress on the main beam, and the web structure of the main beam does not need to bear additional torque. The double rail structure can adopt a simple and rationally stressed cross hinge box structure between the two wheel groups. Compared with the traditional trolley frame, the volume and weight are greatly reduced, and it is also convenient for modular production).

[0016] The bottom of the brake in the present invention is supported on a base, and the right end of the base is fixed to the outer end surface of the left vertical plate of the reel support (the base and the reel support are integrated into one to form an integral installation base).

[0017] In the present invention, a brake cover (having the functions of dustproof, safety and aesthetics) is installed on the periphery of the brake.

[0018] The reducer described in the present invention is a planetary reducer.

[0019] The design principles of the present invention are as follows:

[0020] The present invention modularizes the lifting mechanism and adopts a double-track form, which improves the force on the main beam, makes the force reasonable, the positioning quick, the installation convenient, and facilitates modular production, while also greatly reducing the height and the dead weight; the present invention modularizes the walking mechanism trolley, and utilizes the increase and decrease of the lifting mechanism modules and the rapid assembly of the lifting beam to flexibly assemble bridge cranes of different models and lifting ranges, thereby expanding the scope of use of the bridge crane and reducing the production cost; at the same time, the present invention does not have an integral frame, and uses the connecting beam of the overlapping walking mechanism trolley module and the lifting beam of the hanging lifting mechanism module to form the installation skeleton of the present invention, which reduces the transportation size, has a compact structure, light weight, and a large installation space.

[0021] More specifically, the present invention adopts a double-track form to improve the stress of the main beam, and the web structure of the main beam does not need to bear additional torque. The double-track structure can adopt a cross-hinge axle box structure with a simple structure and reasonable stress between the two wheel groups. Compared with the traditional trolley frame, it greatly reduces the volume and weight, and is also convenient for modular production; at the same time, the cross-hinge axle box and the two walking wheels are installed on the horizontal axis in a side-by-side manner, which also greatly reduces the overall height of the trolley; in addition, because the horizontal axis and the vertical axis installed in the cross-hinge axle box are perpendicular to each other, the correct positions of the four walking wheels in the two groups of walking mechanism trolley modules connected by each longitudinal axis are quickly determined, and rapid assembly can be achieved by simply overlapping the connecting beams on the relative supports, eliminating the trouble of manually adjusting the verticality back and forth, and realizing rapid positioning and quick installation.

[0022] The lifting mechanism module in the present invention also does not have a frame part, and directly uses the reel bracket (6) of the U-shaped frame structure as the installation base of the reel, and the reducer is embedded in the inner cavity of the reel. The overall structure is compact, and the installation space is saved to the maximum extent. At the same time, the lifting mechanism module and the lifting beam are quickly positioned by the cooperation of the pin hole plate fixed on the upper part of the same side of the reel bracket and the pin shaft; the lifting mechanism module and the lifting beam are quickly connected and fixed by the cooperation of the flange plate and the bolt on the lower part of the same side of the reel bracket. By increasing or decreasing the lifting mechanism modules and assembling the lifting beam quickly, bridge cranes of different models and lifting ranges can be flexibly assembled: for example, the lifting capacity of a lifting mechanism module in the present invention is 100t. When a lifting mechanism module is quickly assembled on the lifting beam, a bridge crane with a load of 100t is formed; when two lifting mechanism modules are quickly assembled on the lifting beam, a bridge crane with a load of 200t is formed; when three lifting mechanism modules are quickly assembled on the lifting beam, a bridge crane with a load of 300t is formed; when four lifting mechanism modules are quickly assembled on the lifting beam, a bridge crane with a load of 400t is formed.

[0023] The beneficial effects of the present invention are as follows:

[0024] The present invention modularizes the lifting mechanism and adopts a double-track form, which improves the force on the main beam, makes the force reasonable, the positioning quick, the installation convenient, and facilitates modular production, while also greatly reducing the height and the dead weight; the present invention modularizes the walking mechanism trolley, and utilizes the increase and decrease of the lifting mechanism modules and the rapid assembly of the lifting beam to flexibly assemble bridge cranes of different models and lifting ranges, thereby expanding the scope of use of the bridge crane and reducing the production cost; at the same time, the present invention does not have an integral frame, and uses the connecting beam of the overlapping walking mechanism trolley module and the lifting beam of the hanging lifting mechanism module to form the installation skeleton of the present invention, which reduces the transportation size, has a compact structure, light weight, and a large installation space. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic diagram of the lifting trolley structure of a traditional large bridge crane.

[0026] Figure 2 yes Figure 1 Top view of .

[0027] Figure 3 yes Figure 1 Left view of .

[0028] Figures 1 to 3 The serial numbers are as follows: 1', traditional traveling trolley, 4', traditional lifting mechanism, 7', single guide rail, 8', traditional trolley frame.

[0029] Figure 4 It is a structural schematic diagram of the present invention.

[0030] Figure 5 yes Figure 4 Top view of .

[0031] Figure 6 yes Figure 4 Left view of .

[0032] Figure 7 yes Figure 4 A partial enlarged view of point Ⅰ in the middle.

[0033] Figure 8 It is a structural diagram of the lifting mechanism module in the present invention.

[0034] Figure 9 yes Figure 8 Left view of .

[0035] Figure 10 It is a structural diagram of the traveling mechanism trolley module in the present invention.

[0036] Figure 11 This is a schematic diagram of the installation of a set of lifting mechanism modules and connecting beams.

[0037] Figure 12 This is an installation diagram of two sets of lifting mechanism modules and connecting beams being assembled.

[0038] Figure 13 This is an installation diagram of four sets of lifting mechanism modules and connecting beams.

[0039] Explanation of the serial numbers in the figure: 1. Traveling mechanism trolley module, 1-1. Driven wheel group, 1-2. Cross hinge axle box, 1-3. Horizontal axis, 1-4. Longitudinal axis, 1-5. Support, 1-5-1. Horizontal flange plate, 1-5-2. Vertical positioning rib plate, 1-6. Active wheel group, 1-7. Drive shaft, 1-8. Drive device, 1-9. Shear screw, 2. Connecting beam, 3. Lifting beam, 3-1. Web plate, 3-2. Pin plate, 3-3. Flange hole plate, 3-4. Shaft hole, 4. Lifting mechanism module, 4-1. Reel bracket, 4-1-1. Right vertical plate, 4-1- 2. Left vertical plate, 4-2. Drum, 4-3. Drum support shaft, 4-4. Reducer, 4-5. Power unit, 4-6. Coupling, 4-7. Brake, 4-8. Limit switch, 4-9. Pin hole plate, 4-10. Flange plate, 4-11. Brake cover, 4-12. Base, 4-13. Connecting shaft, 4-14. Coupling, 5. Pulley lifting system, 5-1. Fixed pulley block, 5-2. Fixed pulley axle, 5-3. Movable pulley block, 5-4. Movable pulley axle, 5-5. Wire rope, 5-6. Hook accessories, 6. Main beam, 7. Double guide rails. DETAILED DESCRIPTION

[0040] The present invention will be further described below with reference to the accompanying drawings:

[0041] like Figures 4 to 13 As shown, a lifting trolley suitable for a large bridge crane of the present invention comprises four traveling mechanism trolley modules (1) symmetrically arranged on two main beams (6), two connecting beams (2) overlapped above the two traveling mechanism trolley modules on the same side, a lifting beam (3) horizontally overlapped above the center top of the two connecting beams (2) (the two connecting beams (2) and one lifting beam (3) constitute the installation skeleton of the present invention, and the four traveling mechanism trolley modules are connected as a whole through the installation skeleton to form a complete traveling trolley), a plurality of lifting mechanism modules (4) hung on both sides of the lifting beam (3), and a pulley block lifting system (5) hung on the lower part of the lifting beam (3) (the lifting beam (3) in the installation skeleton is also the installation base of the lifting mechanism modules (4) and the pulley block lifting system (5));

[0042] The walking mechanism trolley module (1) includes a cross hinge box (1-2) with a transverse axis (1-3) and a longitudinal axis (1-4) installed therein, a driven wheel group (1-1) and a driving wheel group (1-6) installed at two outer extension ends of the transverse axis (1-3), located on the left and right outer sides of the cross hinge box (1-2), and supported on double guide rails (7) respectively (the driven wheel group (1-1), the cross hinge box (1-2), and the driving wheel group (1-6) are installed on the transverse axis in a side-by-side manner, which also greatly reduces the overall height of the trolley; the use of a double track form improves the stress of the main beam (6), and the web structure of the main beam (6) does not need to bear additional torque, and the double track structure type A cross hinge axle box structure with a simple structure and reasonable force can be used between the two wheel groups. Compared with the traditional trolley frame, the volume and weight are greatly reduced, and it is also convenient for modular production). A drive shaft (1-7) is installed in a cantilever manner on the outer end of the active wheel group (1-6), a drive device (1-8) is installed on the drive shaft (1-7) (the drive device (1-8) provides movement power, and the movement power is provided to the active wheel group (1-6) through the drive shaft (1-7)), and a support (1-5) positioned and fixed above the cross hinge axle box (1-2) through the longitudinal axis (1-4) (only the front and rear ends of the connecting beam (2) are connected to the respective By connecting the corresponding supports (1-5) on the longitudinal beams, the rapid assembly of the lifting trolley on one side can be achieved; the two connecting beams (2) are then connected by overlapping the lifting beam (3) to form a complete walking trolley in the lifting trolley, and the correct position of all the walking wheels in the four sets of walking mechanism trolley modules is quickly guaranteed, eliminating the trouble of manually adjusting the verticality back and forth, and achieving rapid positioning and quick installation); the horizontal axis (1-3) and the longitudinal axis (1-4) are arranged vertically and crosswise in the horizontal direction (the horizontal axis (1-3) and the longitudinal axis (1-4) are perpendicular to each other, and the horizontal axis (1-3) is perpendicular to the guide rail, the longitudinal axis (1-4) is parallel to the guide rail, and the supports (1-5) are connected to the longitudinal axis (1-4) ) for positioning, so after the support (1-5) is connected by the connecting beam (2), the running wheels in the front and rear two sets of walking mechanism trolley modules realize rapid self-positioning, and the running wheels in the four sets of walking mechanism trolley modules after the two connecting beams (2) are overlapped by the lifting beam (3) also realize rapid self-positioning), the distance between the two axes is less than the sum of the radii of the transverse axis (1-3) and the longitudinal axis (1-4) (that is, the longitudinal axis (1-4) and the transverse axis (1-3) have an overlapping portion), and an arc-shaped groove for embedding the longitudinal axis (1-4) is processed on the transverse axis (1-3) (the longitudinal axis (1-4) is embedded in the groove of the transverse axis (1-3) to ensure that the transverse axis (1-3) will not rotate or move left and right);

[0043] The lifting mechanism module (4) includes a drum support (4-1) of a U-shaped frame structure and a drum (4-2) (the drum (4-2) is used to wind the lifting wire rope, and the drum support (4-1) is the installation base of the drum (4-2)). The right end of the drum (4-2) is supported on the right vertical plate (4-1-1) of the drum support (4-1) through a drum support shaft (4-3), and the left end of the drum (4-2) is supported on the left vertical plate (4-1-2) of the drum support (4-1) through a speed reducer (4-4) embedded in the inner cavity of the drum (the two ends of the drum (4-2) are mounted on both sides of the drum support (4-1)). On the end plate, the drum (4-2) and the reducer (4-4) rotate synchronously; the reducer (4-4) is built into the inner cavity of the drum (4-2), with a compact structure, which greatly saves installation space). The reducer (4-4) and the power unit (4-5) are connected through the coupling I (4-6) with a brake disc, the connecting shaft (4-13), and the coupling II (4-14) (the connecting shaft and the coupling are spline-connected and can be slightly extended and retracted so that the stress deformation of the structure does not affect the power transmission. The power output of the power unit (4-5) is transmitted to the drum (4-2) through the reducer (4-4)); located at the coupling I (4 -6) are provided with brakes (4-7) on both sides of the power unit output shaft and the reducer input shaft (used to control the power unit output shaft, the reducer input shaft and the drum (4-2) to stop rotating, thereby stopping the wire rope (5-5) from rising or falling in the height direction. A limit switch (4-8) is connected to the outer end face of the drum support shaft (4-3) (the limit switch (4-8) is set to the limit position on site: when the hook attachment (5-6) is lifted to the maximum height, the limit switch (4-8) is actuated to stop the drum (4-2) from rotating and the hook attachment (5-6) from lifting; when the hook attachment (5-6) is lifted to the maximum height, the limit switch (4-8) is actuated to stop the drum (4-2) from rotating and the hook attachment (5-6) from lifting; When the component (5-6) descends to the point where only the last three safety circles remain for the rope release of the drum (4-2), the limit switch (4-8) is actuated, causing the drum (4-2) to stop rotating and the hook attachment (5-6) to stop descending. A horizontally extending pin hole plate (4-9) is fixed to the upper portion of the same side of the right vertical plate (4-1-1) and the left vertical plate (4-1-2) (after the pin is installed, the lifting mechanism module (4) and the lifting beam (3) can be quickly positioned), and a flange plate (4-10) with bolt holes is fixed to the lower portion of the same side (after the bolt is installed, the lifting mechanism module (4) and the lifting beam (3) can be quickly connected and fixed).

[0044] The lifting beam (3) is a box beam structure, the upper flange is a rectangular cross-section, and the lower flange is a trapezoidal plate structure extending downward from the middle of the webs (3-1) on both sides; a pin plate (3-2) matching the pin hole plate (4-9) is provided on the corresponding part of the upper flange of the web (3-1) (after the pin shaft is installed, the lifting mechanism module (4) and the lifting beam (3) can be quickly positioned), a flange hole plate (3-3) matching the flange plate (4-10) is provided on the web (3-1) (after the bolt is installed, the lifting mechanism module (4) and the lifting beam (3) can be quickly connected and fixed), and an axis hole (3-4) for installing a fixed pulley shaft is processed on the corresponding part of the lower flange of the web (3-1) (the fixed pulley assembly (5-1) can be hung on the lower part of the lifting beam (3) through the fixed pulley shaft (5-2);

[0045] The pulley block hoisting system (5) is composed of a fixed pulley block (5-1), a fixed pulley axle (5-2), a movable pulley block (5-3), a movable pulley axle (5-4), a steel wire rope (5-5), and a hook attachment (5-6), wherein the fixed pulley block (5-1) is hung on the corresponding portion of the lower flange of the web (3-1) of the lifting beam (3) through the fixed pulley axle (5-2), the movable pulley block (5-3) is hung below the fixed pulley block (5-1) through the steel wire rope (5-5), and the hook attachment (5-6) is hung below the movable pulley block (5-3).

[0046] The cross hinge box (1-2) of the present invention is a square box structure, and horizontal axis mounting holes are symmetrically processed on the left and right side surfaces of the cross hinge box (1-2), and vertical axis mounting holes are symmetrically processed on the front and rear end surfaces of the cross hinge box (1-2), and the vertical axis mounting holes are perpendicular to each other in the horizontal direction (ensuring that the vertical axis (1-4) and the horizontal axis (1-3) are horizontally perpendicular and cross-over and overlap).

[0047] The drive shaft (1-7) in the present invention is a structure of a shaft end cover plus a cantilever extension shaft, and a matching hole for installing a shear screw (1-9) is processed on the outer edge of the shaft end cover.

[0048] The support (1-5) in the present invention is composed of a horizontal flange plate (1-5-1) and a vertical positioning rib plate (1-5-2). A positioning hole for fitting the longitudinal axis (1-4) is machined on the vertical positioning rib plate (1-5-2) (the support (1-5) is positioned by the longitudinal axis (1-4), and the longitudinal axis (1-4) is parallel to the guide rail. After the support is connected by the connecting beam (2), the running wheels in the front and rear two groups of walking mechanism trolley modules realize rapid self-positioning). A connecting hole for fixing the connecting beam (2) is machined on the horizontal flange plate (1-5-1) (after the bolts are inserted, the connection between the connecting beam (2) and the support (1-5) can be realized).

[0049] The driving device (1-8) described in the present invention is a three-in-one driving device that integrates a motor, a brake, and a speed reducer.

[0050] The double guide rails (7) described in the present invention are laid at the corresponding positions of the webs on both sides of the main beam (6) (the use of the double rail form improves the stress of the main beam (6), and the web structure of the main beam (6) does not need to bear additional torque. The double rail structure can adopt a cross hinge axle box structure with simple structure and reasonable stress between the two wheel groups, which greatly reduces the volume and deadweight compared with the traditional trolley frame and is also convenient for modular production).

[0051] The bottom of the brake (4-7) in the present invention is supported on a base (4-12), and the right end of the base (4-12) is fixed to the outer end surface of the left vertical plate (4-1-2) of the reel support (the base (4-12) and the reel support (4-1) are integrated into one to form an integral installation foundation).

[0052] In the present invention, a brake cover (4-11) (having the functions of dustproofing, safety and aesthetics) is installed on the periphery of the brake (4-7).

[0053] The reducer (4-4) described in the present invention is a planetary reducer.

[0054] The specific use of the present invention is as follows:

[0055] First, according to the above structural description and actual needs, four sets of walking mechanism trolley modules and several sets of lifting mechanism modules are assembled respectively; then, two sets of walking mechanism trolley modules (1) are symmetrically arranged on the front and rear of the two main beams (6); then, the front and rear sets of walking mechanism trolley modules (1) are respectively connected as a whole through two connecting beams (2), that is, bolts are installed on the support (1-5) and the bottom connecting plate of the connecting beam (2); then, the fixed pulley group (5-1) is installed on the lifting beam (3), and the lifting beam (3) is horizontally connected above the center top of the two connecting beams (2); then, the required number of lifting mechanism modules are hung on both sides of the lifting beam (3) to assemble a bridge crane of the required model and lifting range; finally, the other components of the pulley group lifting system (5) are hung on the lower part of the lifting beam (3) through the fixed pulley group (5-1). In this way, the present invention is quickly assembled and can be moved to a position where lifting is required along the double guide rails (7) as needed. The power unit (4-5) is started to drive the drum (4-2) to rotate. At the same time, the wire rope (5-5) wound on the drum (4-2), the fixed pulley group (5-1), and the movable pulley group (5-3) rotates, driving the movable pulley group (5-3) to move the hook attachment (5-6) and the lifting object up and down, and then lifting it to the required position.

Claims

1. A lifting trolley suitable for large bridge cranes, characterized by: It comprises four walking mechanism trolley modules (1) symmetrically arranged on two main beams (6) with double guide rails (7), two connecting beams (2) overlapped above the two front and rear walking mechanism trolley modules on the same side, a lifting beam (3) horizontally overlapped above the center top of the two connecting beams (2), a plurality of lifting mechanism modules (4) hung on both sides of the lifting beam (3), and a pulley lifting system (5) hung on the lower part of the lifting beam (3); the double guide rails (7) are laid on the corresponding parts of the webs on both sides of the main beam (6); The walking mechanism trolley module (1) comprises a cross hinge box (1-2) with a transverse axis (1-3) and a longitudinal axis (1-4) therein, a driven wheel group (1-1) and a driving wheel group (1-6) which are installed at two outer extension ends of the transverse axis (1-3), are located on the left and right outer sides of the cross hinge box (1-2) and are supported on double guide rails (7), a drive shaft (1-7) installed in a cantilever manner at the outer end of the driving wheel group (1-6), a drive device (1-8) installed on the drive shaft (1-7), and a driven wheel group (1-8) which is positioned through the longitudinal axis (1-4) and fixed to the cross hinge box (1-2). 2) an upper support (1-5); the transverse axis (1-3) and the longitudinal axis (1-4) are arranged vertically and crosswise in the horizontal direction, the distance between the two axes is less than the sum of the radii of the transverse axis (1-3) and the longitudinal axis (1-4), and an arc-shaped groove for embedding the longitudinal axis (1-4) is processed on the transverse axis (1-3); the cross hinge box (1-2) is a square box structure, and transverse axis mounting holes are symmetrically processed on the left and right side surfaces of the cross hinge box (1-2), and longitudinal axis mounting holes are symmetrically processed on the front and rear end surfaces of the cross hinge box (1-2), and the transverse axis mounting holes and the longitudinal axis mounting holes are perpendicular to each other in the horizontal direction; The lifting mechanism module (4) includes a reel support (4-1) of a U-shaped frame structure and a reel (4-2), the right end of the reel (4-2) is supported on the right vertical plate (4-1-1) of the reel support (4-1) through a reel support shaft (4-3), and the left end of the reel (4-2) is supported on the left vertical plate (4-1-2) of the reel support (4-1) through a reducer (4-4) embedded in the inner cavity of the reel, and the reducer (4-4) and the power unit (4-5) are connected through a coupling with a brake disc. Ⅰ (4-6), a connecting shaft (4-13), and a coupling Ⅱ (4-14) are connected; brakes (4-7) are installed on the power unit output shaft and the reducer input shaft on both sides of the coupling Ⅰ (4-6); a limit switch (4-8) is connected to the outer end surface of the reel support shaft (4-3); a horizontally extending pin hole plate (4-9) is fixed to the upper part of the same side of the right vertical plate (4-1-1) and the left vertical plate (4-1-2), and a flange plate (4-10) with bolt holes is fixed to the lower part of the same side; The lifting beam (3) is a box beam structure, the upper flange is a rectangular cross-section, and the lower flange is a trapezoidal plate structure extending downward from the middle of the webs (3-1) on both sides; a pin plate (3-2) matching the pin hole plate (4-9) is provided on the corresponding portion of the upper flange of the web (3-1), a flange hole plate (3-3) matching the flange plate (4-10) is provided on the web (3-1), and an axis hole (3-4) for inserting the fixed pulley axle is processed on the corresponding portion of the lower flange of the web (3-1); The pulley block hoisting system (5) is composed of a fixed pulley block (5-1), a fixed pulley axle (5-2), a movable pulley block (5-3), a movable pulley axle (5-4), a steel wire rope (5-5), and a hook attachment (5-6), wherein the fixed pulley block (5-1) is hung on the corresponding portion of the lower flange of the web (3-1) of the lifting beam (3) through the fixed pulley axle (5-2), the movable pulley block (5-3) is hung below the fixed pulley block (5-1) through the steel wire rope (5-5), and the hook attachment (5-6) is hung below the movable pulley block (5-3).

2. A lifting trolley suitable for a large bridge crane according to claim 1, characterized in that: The drive shaft (1-7) is a structure of a shaft end cover plus a cantilever extension shaft, and a matching hole for installing a shear screw (1-9) is processed on the outer edge of the shaft end cover.

3. The lifting trolley suitable for large bridge crane according to claim 1 is characterized in that: The support (1-5) is composed of a horizontal flange plate (1-5-1) and a vertical positioning rib plate (1-5-2). A positioning hole for fitting the longitudinal axis (1-4) is machined on the vertical positioning rib plate (1-5-2), and a connection hole for fixing the connecting beam (2) is machined on the horizontal flange plate (1-5-1).

4. The lifting trolley suitable for a large bridge crane according to claim 1, characterized in that: The driving device (1-8) is a three-in-one driving device that integrates a motor, a brake, and a speed reducer.

5. The lifting trolley suitable for large bridge crane according to claim 1 is characterized in that: The bottom of the brake (4-7) is supported on a base (4-12), and the right end of the base (4-12) is fixed on the outer end surface of the left vertical plate (4-1-2) of the reel support.

6. The lifting trolley suitable for large bridge crane according to claim 1, characterized in that: A brake cover (4-11) is installed on the periphery of the brake (4-7).

7. The lifting trolley suitable for large bridge crane according to claim 1, characterized in that: The reducer (4-4) is a planetary reducer.

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