Trolley frame structure of bridge crane

Abstract

The invention relates to the technical field of hoisting and transporting equipment, and particularly discloses a bridge crane trolley frame structure which comprises a frame, and an adjusting assembly is arranged below the frame; the frame is formed by splicing a plurality of supporting columns, a first supporting plate is jointly fixed to the tops of the supporting columns, and wheels are installed at the bottoms of the supporting columns located on the same side of the frame. The frame is a rectangular frame, and the four lifting assemblies are arranged at the midpoint positions of the four edges of the frame correspondingly. The lifting assembly comprises a U-shaped supporting seat, and the bottom of the supporting seat is connected with the supporting column in a sliding mode. A winding drum is rotationally connected between the inner walls of the supporting seats, and a first steel wire rope is wound around the winding drum. A first mounting groove is formed in the side, away from the frame, of the supporting seat in the length direction, two first guide wheels are symmetrically arranged in the first mounting groove, and the side wall of one side of each first guide wheel is rotationally connected with the inner wall of the first mounting groove; the problem that a traditional bridge crane is low in lifting stability and safety is solved.

Description

Technical Field

[0001] This invention relates to the field of lifting and transport equipment technology, and in particular to a trolley frame structure for a bridge crane. Background Technology

[0002] In industrial production and logistics transportation, bridge cranes are widely used as important lifting equipment for loading, unloading, handling, and hoisting goods. The trolley frame structure of a bridge crane is a key component, bearing the crane's lifting mechanism and other important parts, and directly affecting the crane's performance and operational safety.

[0003] Traditional trolley frame structures for bridge cranes have several shortcomings in design and use. Firstly, when lifting heavy objects, the center of gravity may shift, making it difficult for traditional lifting methods to ensure uniform tension at all four lifting points. This can easily lead to tilting during lifting, increasing operational risks and potentially causing accidents. Secondly, existing trolley frame structures lack flexibility in adjusting the lifting point positions and wire rope angles, making it difficult to adapt to the lifting needs of heavy objects with different shapes, sizes, and center of gravity positions, thus limiting the crane's versatility and operational efficiency.

[0004] Furthermore, in traditional trolley frame structures, the wire ropes are prone to uneven tension and friction during operation, leading to accelerated wear, shortened service life, and increased equipment maintenance costs and downtime. Moreover, the trolley frame's stability needs improvement; swaying may occur during lateral movement, affecting the accuracy of lifting operations.

[0005] Therefore, a bridge crane trolley frame structure is proposed to solve the problem of low lifting stability and safety in traditional bridge cranes. Summary of the Invention

[0006] The purpose of this invention is to provide a trolley frame structure for a bridge crane to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: A bridge crane trolley frame structure includes a frame, and an adjustment component is provided below the frame; The frame is assembled from multiple support columns, and a support plate is fixed to the top of the multiple support columns. Wheels are installed at the bottom of the support columns located on the same side of the frame. The frame is a rectangular frame, and four lifting components are respectively set at the midpoint of the four sides of the frame; The lifting assembly includes a U-shaped support base, the bottom of which is slidably connected to the support column; a drum is rotatably connected between the inner walls of the support base, and a steel wire rope is wound on the drum. The support base has a mounting groove along its length on the side away from the frame. Two guide wheels are symmetrically arranged in the mounting groove. One side wall of the guide wheel is rotatably connected to the inner wall of the mounting groove. The wire rope passes between the two guide wheels and contacts the two guide wheels simultaneously. A winding wheel is fixed to the other side wall of each guide wheel. A steel wire rope is provided between two winding reels in the same lifting assembly, and the two ends of the steel wire rope are respectively fixed to the two corresponding winding reels. The adjustment assembly includes a cross-shaped telescopic frame with four telescopic ends. Each of the four telescopic ends is fixed with an adjustment ring. A support plate is fixed to the side of the adjustment ring away from the cross-shaped telescopic frame. A winding wheel is fixed to the support plate. The four winding wheels correspond one-to-one with the four support seats. The axis of each winding wheel is located at the middle position of the two winding wheels of the corresponding lifting assembly. The steel wire rope is wound around the corresponding winding wheel.

[0008] Preferably, a support block is rotatably connected to the inner wall of the adjusting ring, and an installation groove 2 is provided through both ends of the support block. A guide wheel 2 is rotatably connected between the inner walls of the two sides of the installation groove 2. A wire-passing groove is provided on the side wall of the installation groove 2. The wire-passing groove and the guide wheel 2 are used for the steel wire rope 2 to pass through, and the steel wire rope 2 is in contact with the guide wheel 2.

[0009] Preferably, a motor is fixed to the bottom of the second support plate, and a gear is fixed to the output end of the motor facing the inner wall of the second support plate. A gear ring is fixed coaxially to the outer wall of the support block, and the gear and the gear ring mesh with each other.

[0010] Preferably, a mounting block is fixed at the top center of the support plate, and four cylinders are arranged in a circumferential array on the outer wall of the mounting block. The four cylinders are respectively arranged in a one-to-one correspondence with four lifting components. A motor is fixed at the output end of each cylinder, and a sliding seat is fixed at the bottom of each motor. The sliding seat is slidably connected to the support plate.

[0011] Preferably, the output end of the second motor is connected to the reducer, the reducer is fixed to the first support plate, the reducer extends through the first support plate to the side wall of the support base and corresponds to the position of the drum, and the output end of the reducer passes through the support base and is fixedly connected to the drum.

[0012] Preferably, each of the guide wheels is provided with a guide groove in the circumferential direction, the guide groove being used for the wire rope to pass through and to prevent the wire rope from deviating; The two guide wheels in the same mounting groove make circumferential contact, and the contact parts of the two guide grooves together form the guide channel of the wire rope.

[0013] Preferably, the bottom of the support columns on the same side is fixed with a mounting bracket, the mounting bracket is welded to the bottom of the support column, and the length of the mounting bracket matches the spacing of the support columns on the same side.

[0014] Preferably, wheels are symmetrically installed in the mounting frame, the wheels are rotatably connected to the mounting frame via bearings, and the wheel grooves are adapted to the track dimensions of the main beam.

[0015] Preferably, the cross telescopic frame is equipped with four cylinders, which are installed one-to-one with the four telescopic ends to provide a stable driving source for the telescopic movement of the cross telescopic frame.

[0016] Preferably, in the initial state, the position between the two guide wheels in the same lifting assembly is on the same axis as the position of the threading groove and the guide wheel.

[0017] The beneficial effects of this invention are as follows: Through the unique design of the lifting and adjusting components, this invention ensures that all four steel wire ropes work together to provide tension to the object during lifting. When the object's center of gravity is located at the center of the telescopic cross frame, the tension applied by the four steel wire ropes is consistent, enabling the object to be lifted smoothly. When the object's center of gravity shifts, the tension can be changed by adjusting the angle of the steel wire ropes in the vertical direction, ensuring that the tension applied by the four steel wire ropes is consistent. This effectively prevents the object from tilting during lifting, greatly improving the safety and stability of lifting operations. The distance between the four adjusting rings can be adjusted by the synchronous or independent extension and retraction of the four telescopic ends. Simultaneously, in conjunction with cylinder two driving motor two, reducer, and support base to move synchronously, the spacing between wire ropes two can be changed, and the vertical position of wire rope one above the adjusting assembly can be maintained when adjusting the angle of wire rope two. This flexible adjustment method can adapt to the lifting width and center of gravity adjustment requirements under different lifting conditions, improving the flexibility of the adjusting assembly and enabling the crane to adapt to lifting operations of heavy objects of different shapes, sizes, and center of gravity positions. The inverted triangular shape formed by the two winding reels (reel 1 and reel 2) ensures even force distribution during the lifting and adjustment of the component, reducing wear on the wire rope. Simultaneously, by rationally designing the positional relationship between the guide wheel and the wire-threading groove, and by using motor 1 to drive the support block to adjust the direction of the wire-threading groove, the guide wheel 2 is ensured to receive pressure from the wire rope, further optimizing the stress on the wire rope, extending its service life, and reducing equipment maintenance costs and downtime. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present invention; Figure 2 This is a schematic diagram of the framework structure of an embodiment of the present invention; Figure 3 This is a schematic diagram of the lifting component structure according to an embodiment of the present invention; Figure 4 This is a schematic diagram of the adjustment component structure according to an embodiment of the present invention; Figure 5 This is a schematic diagram of the internal structure of the adjustment component according to an embodiment of the present invention.

[0019] In the diagram: 1. Frame; 101. Support column; 102. Support plate one; 103. Mounting bracket; 1031. Wheel; 104. Mounting block; 1041. Cylinder two; 1042. Motor two; 10421. Sliding seat; 1043. Reducer; 2. Lifting assembly; 201. Support seat; 202. Drum; 2021. Wire rope one; 203. Mounting groove one; 204. Guide wheel one; 204 1. Guide groove; 205. Winding reel one; 206. Wire rope two; 3. Adjustment assembly; 301. Cross telescopic frame; 3011. Support plate two; 3012. Cylinder one; 302. Adjusting ring; 3021. Support block; 3022. Mounting groove two; 3023. Guide wheel two; 3024. Threading groove; 3025. Gear ring; 303. Winding reel two; 304. Motor one; 3041. Gear. Detailed Implementation

[0020] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0021] Reference Figures 1-5 A bridge crane trolley frame structure includes a frame 1, and an adjustment component 3 is provided below the frame 1; The frame 1 is composed of multiple high-strength support columns 101. The support columns 101 are made of steel with rectangular or I-shaped cross sections. The support columns 101 are fixed by welding or bolting, and the connection points are reinforced to ensure that the overall structure of the frame 1 is compact and not easily deformed, providing a stable foundation for the subsequent installation of components.

[0022] A support plate 102 is fixed to the top of multiple support columns 101. The support plate 102 is sealed to the top of the support column 101 by welding. The support plate 102 is used to support the components installed on the top and provides reliable support for the stable operation of the top components.

[0023] The frame 1 is a rectangular frame, and four lifting components 2 are respectively set at the midpoints of the four sides of the frame 1.

[0024] The lifting assembly 2 includes a U-shaped support base 201, the bottom of which is slidably connected to the support column 101; a drum 202 is rotatably connected between the inner walls of the support base 201, and a steel wire rope 2021 is wound on the drum 202.

[0025] The support base 201 has a mounting groove 203 along its length on the side away from the frame 1. Two guide wheels 204 are symmetrically arranged in the mounting groove 203. One side wall of the guide wheel 204 is rotatably connected to the inner wall of the mounting groove 203. The wire rope 2021 passes between the two guide wheels 204 and contacts both guide wheels 204 simultaneously. Each guide wheel 204 has a guide groove 2041 circumferentially provided. The guide groove 2041 is used for the wire rope 2021 to pass through and prevent the wire rope 2021 from deviating.

[0026] The two guide wheels 204 in the same mounting groove 203 are in contact with each other, and at this time the contact parts of the two guide grooves 2041 together form the guide channel of the wire rope 2021.

[0027] Each guide wheel 204 has a winding wheel 205 fixedly installed on the other side wall, and the winding wheel 205 is arranged coaxially with the guide wheel 204.

[0028] A steel wire rope 206 is provided between two winding reels 205 in the same lifting assembly 2, and the two ends of the steel wire rope 206 are respectively fixed on the two corresponding winding reels 205.

[0029] During operation, the rotation of the drum 202 drives the steel wire rope 2021 wound on it to move. Since the steel wire rope 2021 is in contact with the two guide wheels 204 at the same time, it drives the two guide wheels 204 to rotate synchronously. Since the winding wheel 205 is fixedly connected to the guide wheels 204 and is coaxial, the rotation of the guide wheels 204 will synchronously drive the winding wheel 205 to rotate. During the rotation of the winding wheel 205, the steel wire rope 206 is wound up, thereby realizing the lifting of the adjustment component 3.

[0030] The adjusting assembly 3 includes a cross-shaped telescopic frame 301 with four telescopic ends. An adjusting ring 302 is fixed to each of the four telescopic ends. A support plate 3011 is fixed to the side of the adjusting ring 302 away from the cross-shaped telescopic frame 301. A winding wheel 303 is fixed to the support plate 3011. The four winding wheels 303 correspond vertically to the four support seats 201. The axis of each winding wheel 303 is located in the middle of the two winding wheels 205 of the corresponding lifting assembly 2. The wire rope 206 is wound around the corresponding winding wheel 303, thus forming an inverted triangle shape between the two winding wheels 205 and the winding wheel 303. This facilitates even force distribution when lifting the adjusting assembly 3, reduces wear on the wire rope 206, and improves the stability of the adjusting assembly 3's operation, preventing swaying or deviation during lifting and ensuring the safety and accuracy of the lifting operation.

[0031] In some preferred embodiments, a support block 3021 is rotatably connected to the inner wall of the adjusting ring 302. A second mounting groove 3022 is provided through both ends of the support block 3021. A second guide wheel 3023 is rotatably connected between the inner walls of the two sides of the second mounting groove 3022. A wire-passing groove 3024 is provided on the side wall of the second mounting groove 3022. The wire-passing groove 3024 and the second guide wheel 3023 are used for the passage of a second steel wire rope 206, and the second steel wire rope 206 is in contact with the second guide wheel 3023.

[0032] In the initial state, the position between the two guide wheels 204 in the same lifting assembly 2 is on the same axis as the position of the wire groove 3024 and the guide wheel 3023, thereby ensuring that the wire rope 206 is in a vertical state. At this time, the end of the first wire rope 2021, which is led out from the drum 202, passes vertically downward through the guide channel formed by the two guide grooves 2041 and is guided to the lower part of the adjusting component 3 through the wire groove 3024 and the guide wheel 3023. When it is necessary to lift the object, the ends of the four first wire ropes 2021 are fixed to the four positions of the object to be lifted. By rotating the drum 202, the ends of the first wire ropes 2021 and the object fixed to them move upward. During the upward movement of the object, the four first wire ropes 2021 provide tension to the object being lifted. When the center of gravity of the object is located in the middle of the cross telescopic frame 301... When the center of gravity of the object is shifted, the tension applied by the four steel wire ropes 2021 to the object being lifted is consistent, ensuring a smooth lift. However, if the center of gravity of the object shifts, the consistent tension applied by the four steel wire ropes 2021 may cause the object to tilt during the lift. To avoid this problem, the tension applied by the four steel wire ropes 2021 to the object being lifted needs to be adjusted in real time during the lift. As is well known, the tension applied by the steel wire ropes 2021 to the object being lifted can be changed by altering the vertical angle of the steel wire ropes 2021, thus ensuring that the tension applied by the four steel wire ropes 2021 to the object being lifted is consistent.

[0033] When it is necessary to adjust the angle of wire rope 206, the position of the adjusting ring 302 corresponding to the wire rope 2021 whose angle needs to be adjusted is changed by adjusting the telescopic end of the cross telescopic frame 301. At the same time, the corresponding drum 202 adjusts the wire rope 2021 located above the adjusting component 3 to keep it in a vertical state.

[0034] In some preferred embodiments, the cross telescopic frame 301 is provided with four cylinders 3012, which are respectively installed on the four telescopic ends to provide a stable driving source for the telescopic movement of the cross telescopic frame 301. By extending and retracting the telescopic ends of the cylinders 3012, the four telescopic ends of the cross telescopic frame 301 are driven to extend and retract synchronously or independently, thereby adjusting the spacing between the four adjusting rings 302 to adapt to different lifting operation requirements and improve the flexibility of the adjusting component 3.

[0035] In some preferred embodiments, a motor 304 is fixed to the bottom of the second support plate 3011, a gear 3041 is fixed to the output end of the motor 304 facing the inner wall of the second support plate 3011, and a gear ring 3025 is fixed coaxially to the outer wall of the support block 3021, with the gear 3041 and the gear ring 3025 meshing with each other.

[0036] The motor 304 drives the gear 3041 to rotate, and the gear 3041 drives the gear ring 3025 that meshes with it to rotate synchronously, which in turn drives the support block 3021 to rotate around its own axis.

[0037] Let a be the distance between the two guide wheels 3023 on the same axis of the cross telescopic frame 301. When the distance between the steel wire rope 2021 corresponding to the two guide wheels 3023 on the same axis and the connection point of the object is greater than a, the support block 3021 is rotated so that the wire groove 3024 is oriented toward the center of the cross telescopic frame 301.

[0038] When the distance between the connection point of the steel wire rope 2021 corresponding to the two guide wheels 3023 passing through the same axis and the object is less than a, the wire groove 3024 is moved away from the center of the cross telescopic frame 301 by rotating the support block 3021, so that the guide wheel 3023 can be subjected to the pressure of the steel wire rope 2021.

[0039] In some preferred embodiments, a mounting block 104 is fixed at the top center of the support plate 102. Four cylinders 1041 are arranged in a circumferential array on the outer wall of the mounting block 104, corresponding one-to-one with four lifting components 2. A motor 1042 is fixed to the output end of each cylinder 1041, and a sliding seat 10421 is fixed to the bottom of each motor 1042. The sliding seat 10421 is slidably connected to the support plate 102. The output end of the motor 1042 is connected to a reducer 1043, which is fixed to the support plate 102. The reducer 1043 extends through the support plate 102 to the side wall of the support base 201 and corresponds to the position of the drum 202. The output end of the reducer 1043 extends through the support base 201 and is fixedly connected to the drum 202. The driving force is provided by motor 1042, and after being reduced and increased in torque by reducer 1043, the drum 202 is driven to rotate stably. Simultaneously, when cylinder 1041 extends and retracts, it can drive motor 1042, reducer 1043 and support 201 to move synchronously, and cylinder 3012 in the cross telescopic frame 301 extends and retracts synchronously, thereby changing the spacing between steel wire ropes 206 to adapt to the hoisting width and center of gravity adjustment requirements under different lifting conditions.

[0040] In some preferred embodiments, a mounting frame 103 is fixed to the bottom of the support columns 101 on the same side. The mounting frame 103 adopts a U-shaped channel steel structure and is welded and fixed to the bottom of the support column 101. The length of the mounting frame 103 matches the spacing of the support columns 101 on the same side. Wheels 1031 are symmetrically installed inside the mounting frame 103. The wheels 1031 are rotatably connected to the mounting frame 103 through bearings. The wheel grooves of the wheels 1031 are adapted to the track size of the main beam. The wheels 1031 slide on the track of the main beam, driving the entire trolley frame and the top lifting component to move back and forth along the track, realizing the lateral displacement of the lifting operation.

[0041] Working principle: In the initial state, the position between the two guide wheels 204 in the same lifting assembly 2 is on the same axis as the position of the wire groove 3024 and the guide wheel 3023, thereby ensuring that the wire rope 206 is in a vertical state.

[0042] When it is necessary to lift the object to be lifted, the mounting bracket 103 is positioned directly above the object to be lifted by means of the wheels 1031.

[0043] At this time, the end of the steel wire rope 2021 leading out from the drum 202 passes vertically downward through the guide channel formed by the two guide grooves 2041 and is guided to the lower part of the adjustment component 3 through the wire groove 3024 and the guide wheel 3023. When it is necessary to lift the object, the ends of the four steel wire ropes 2021 are fixed to the four positions of the object to be lifted.

[0044] After the wire rope 2021 is fixed to the object to be lifted, the driving force is provided by the motor 1042. After the speed reduction and torque increase by the reducer 1043, the drum 202 is driven to rotate stably.

[0045] Rotating the drum 202 causes the end of the wire rope 2021 and the object fixed to it to move upward. During the upward movement of the object, the four wire ropes 2021 work together to provide tension to the object being lifted. When the center of gravity of the object is located at the center of the cross telescopic frame 301, the tension exerted by the four wire ropes 2021 on the object being lifted is consistent, allowing the object to be lifted smoothly. When the center of gravity of the object shifts, the tension exerted by the four wire ropes 2021 on the object being lifted may become inconsistent, which may cause the object to tilt during the lifting process. To avoid this problem, it is necessary to adjust the tension exerted by the four wire ropes 2021 on the object being lifted in real time during the lifting process. As is well known, the tension exerted by the wire ropes 2021 on the object being lifted can be changed by changing the angle of the wire ropes 2021 in the vertical direction, thereby ensuring that the tension exerted by the four wire ropes 2021 on the object being lifted is consistent.

[0046] Specifically, when it is necessary to adjust the angle of the wire rope 206, the four telescopic ends of the cross telescopic frame 301 are synchronously or independently extended and retracted by the cylinder 3012, thereby adjusting the distance between the four adjusting rings 302 and changing the position of the adjusting ring 302 corresponding to the wire rope 2021 whose angle needs to be adjusted. At the same time, the motor 1042, reducer 1043 and support base 201 are moved synchronously by starting the cylinder 1041, so that the wire rope 2021 located above the adjusting component 3 remains vertical when the corresponding drum 202 is adjusted at the same time.

[0047] During the process of applying tension to the object with the steel wire rope 2021 and gradually changing the angle of force application, let the distance between the two guide wheels 3023 on the same axis on the cross telescopic frame 301 be a. When the distance between the connection point of the steel wire rope 2021 corresponding to the two guide wheels 3023 on the same axis and the object is greater than a, the support block 3021 is rotated to make the wire groove 3024 face the center of the cross telescopic frame 301.

[0048] When the distance between the connection point of the steel wire rope 2021 corresponding to the two guide wheels 3023 passing through the same axis and the object is less than a, the wire groove 3024 is moved away from the center of the cross telescopic frame 301 by rotating the support block 3021, so that the guide wheel 3023 can be subjected to the pressure of the steel wire rope 2021.

[0049] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A trolley frame structure for a bridge crane, characterized in that, Includes a frame, with an adjustment component disposed below the frame; The frame is assembled from multiple support columns, and a support plate is fixed to the top of the multiple support columns. Wheels are installed at the bottom of the support columns located on the same side of the frame. The frame is a rectangular frame, and four lifting components are respectively set at the midpoint of the four sides of the frame; The lifting assembly includes a U-shaped support base, the bottom of which is slidably connected to the support column; a drum is rotatably connected between the inner walls of the support base, and a steel wire rope is wound on the drum. The support base has a mounting groove along its length on the side away from the frame. Two guide wheels are symmetrically arranged in the mounting groove. One side wall of the guide wheel is rotatably connected to the inner wall of the mounting groove. The wire rope passes between the two guide wheels and contacts the two guide wheels simultaneously. A winding wheel is fixed to the other side wall of each guide wheel. A steel wire rope is provided between two winding reels in the same lifting assembly, and the two ends of the steel wire rope are respectively fixed to the two corresponding winding reels. The adjustment assembly includes a cross-shaped telescopic frame with four telescopic ends. Each of the four telescopic ends is fixed with an adjustment ring. A support plate is fixed to the side of the adjustment ring away from the cross-shaped telescopic frame. A winding wheel is fixed to the support plate. The four winding wheels correspond one-to-one with the four support seats. The axis of each winding wheel is located at the middle position of the two winding wheels of the corresponding lifting assembly. The steel wire rope is wound around the corresponding winding wheel.

2. The bridge crane trolley frame structure according to claim 1, characterized in that, The inner wall of the adjusting ring is rotatably connected to a support block. The support block has a second mounting groove through both ends. The inner walls of the two sides of the second mounting groove are rotatably connected to a second guide wheel. The side wall of the second mounting groove has a wire-passing groove. The wire-passing groove and the second guide wheel are used for the second steel wire rope to pass through, and the second steel wire rope is in contact with the second guide wheel.

3. A bridge crane trolley frame structure according to claim 1, characterized in that, A motor is fixed to the bottom of the second support plate. A gear is fixed to the output end of the motor facing the inner wall of the second support plate. A gear ring is fixed coaxially to the outer wall of the support block. The gear and the gear ring mesh with each other.

4. The bridge crane trolley frame structure according to claim 1, characterized in that, A mounting block is fixed at the top center of the support plate. Four cylinders are arranged in a circumferential array on the outer wall of the mounting block. The four cylinders are respectively arranged in a one-to-one correspondence with four lifting components. A motor is fixed at the output end of each cylinder. A sliding seat is fixed at the bottom of each motor. The sliding seat is slidably connected to the support plate.

5. The bridge crane trolley frame structure according to claim 4, characterized in that, The output end of the second motor is connected to the reducer. The reducer is fixed to the first support plate. The reducer extends through the first support plate to the side wall of the support base and corresponds to the position of the drum. The output end of the reducer passes through the support base and is fixedly connected to the drum.

6. The bridge crane trolley frame structure according to claim 1, characterized in that, Each of the guide wheels is provided with a guide groove in the circumferential direction, the guide groove being for the wire rope to pass through and preventing the wire rope from deviating; The two guide wheels in the same mounting groove make circumferential contact, and the contact parts of the two guide grooves together form the guide channel of the wire rope.

7. The bridge crane trolley frame structure according to claim 1, characterized in that, A mounting bracket is fixed to the bottom of the support columns on the same side. The mounting bracket is welded to the bottom of the support column, and the length of the mounting bracket matches the spacing of the support columns on the same side.

8. The bridge crane trolley frame structure according to claim 7, characterized in that, The mounting frame contains symmetrically mounted wheels, which are rotatably connected to the mounting frame via bearings. The wheel grooves are adapted to the track dimensions of the main beam.

9. The trolley frame structure of a bridge crane according to claim 1, characterized in that, The telescopic cross frame is equipped with four cylinders, which are installed one-to-one with the four telescopic ends, providing a stable driving source for the telescopic movement of the cross frame.

10. A bridge crane trolley frame structure according to claim 2, characterized in that, In the initial state, the position between the two guide wheels in the same lifting assembly is on the same axis as the position of the threading groove and the guide wheel.

Images