Tire changing device inside the trough-shaped beam transport vehicle

Abstract

This utility model provides an inner tire changing device for a trough-shaped beam transport vehicle, including a support frame, a lifting platform, a folding arm, and a lifting assembly. The support frame is fixed to the bottom frame of the beam transport vehicle and is equipped with a lifting drive component. The lifting platform is vertically slidably mounted on the support frame and connected to the lifting drive component. The folding arm is rotatably mounted on the lifting platform and used for vertical swinging. The lifting assembly is slidably connected to the folding arm and used for lifting tires. The folding arm has a working state where it swings flat and overlaps the top of one side beam of the beam transport vehicle, and a retracted state where it swings and retracts to rest against the support frame. The inner tire changing device for a trough-shaped beam transport vehicle provided by this utility model can achieve flexible movement during tire lifting through the swinging folding arm and the slidably mounted lifting assembly, improving tire installation efficiency; it can also retract the folding arm for easy transportation and storage.

Description

Technical Field

[0001] This utility model belongs to the field of mechanical equipment maintenance tooling technology, specifically relating to a tire changing device inside a trough-shaped beam transport vehicle. Background Technology

[0002] As a core piece of equipment in bridge construction for transporting heavy components, the inner tires of the trough-type girder transport vehicle face frequent wear and replacement needs due to long-term service in complex roadbed environments. The unique trough-shaped structure of this type of vehicle results in a compact layout of the inner tires, with the wheel set surrounded by the frame, side beams, and other components, forming a narrow three-dimensional installation space.

[0003] In current maintenance operations, the replacement of inner tires typically involves fixing a vertical H-beam to the frame, with a horizontal H-beam bolted to the top of the vertical H-beam. This horizontal H-beam rests on a side beam, and a hand-operated hoist is mounted on it. When lifting the tire, the hoist is suspended from the middle of the horizontal H-beam, and the tire is gradually raised to the appropriate height by manually pulling the hoist's rope. Because the hand-operated hoist is a single-point suspension, when the tire needs to be aligned with the axle mounting hole, the operator must not only control the rope pulling speed to adjust the tire's descent height but also manually push, pull, and pry to correct lateral and angular deviations. Maintenance is even more inconvenient and inefficient within the confined working space of the inner tire. Furthermore, the large size of the vertical and horizontal H-beams occupies considerable space during transport, hindering flexible operation. Utility Model Content

[0004] This utility model provides an inner tire changing device for a trough-shaped beam transport vehicle, which aims to improve the changing efficiency and operational flexibility of the inner tires of the trough-shaped beam transport vehicle.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A tire changing device for the inner side of a trough-shaped beam transport vehicle is provided, including a support frame, a lifting platform, a folding arm, and a lifting assembly; the support frame is fixed to the bottom frame of the beam transport vehicle, and a lifting drive component is provided on the support frame; the lifting platform is vertically slidably mounted on the support frame and connected to the lifting drive component; the folding arm is rotatably mounted on the lifting platform and used for swinging up and down; the lifting assembly is slidably connected to the folding arm and used for lifting tires; wherein, the folding arm has a working state of swinging flat and overlapping the top of one side beam of the beam transport vehicle, and a retracted state of swinging and retracting to be close to the support frame.

[0006] In one possible implementation, the folding arm includes a rotary drive, a first cantilever, a second cantilever, and a transmission assembly; the rotary drive is mounted on a lifting platform; the first cantilever is rotatably mounted on the lifting platform and connected to the output end of the rotary drive; the second cantilever is hinged to the first cantilever; the transmission assembly is mounted on the lifting platform and connected to the first and second cantilever; when the rotary drive drives the first cantilever to swing up and down, the transmission assembly is used to drive the second cantilever to fold or unfold.

[0007] In some embodiments, the transmission assembly includes a first rod, a second rod, and a third rod; the first rod is rotatably connected to a first cantilever and has two swinging ends that swing up and down; the second rod is rotatably mounted on a second cantilever and rotatably connected to one of the swinging ends; one end of the third rod is rotatably connected to a lifting platform, and the other end is rotatably connected to another swinging end, and the third rod is used to cooperate with the first cantilever to form a parallelogram-shaped four-bar linkage.

[0008] For example, a limiting plate is provided on the first cantilever, which is used to abut against the top of the second cantilever when the second cantilever is opened.

[0009] For example, both the first and second cantilever arms have clearance grooves along their length, and sliding grooves are provided on the two opposite side walls of the clearance grooves. The hoisting assembly is slidably connected to the sliding grooves and extends out of the clearance grooves.

[0010] In one possible implementation, the lifting assembly includes a lifting element, two sets of pulleys, and a support frame; the two sets of pulleys are respectively connected to both sides of the lifting element and are rolled in the grooves; the support frame is mounted on the lifting element and is used to lift the tire.

[0011] In some embodiments, each set of pulleys includes multiple pulleys arranged in a horizontal array, each pulley cooperating with the other to allow the lifting element to pass smoothly through the intersection of the first cantilever and the second cantilever.

[0012] For example, the support frame includes two frames and a lifting rope, the two frames are hinged together; the two ends of the lifting rope are respectively connected to the two frames and the lifting rope is suspended on the lifting element.

[0013] In one possible implementation, the lifting drive includes two threaded rods and a rotary motor. The two threaded rods are vertically rotatably mounted on the support frame and are threadedly engaged with the lifting platform. The rotary motor is mounted on the lifting platform and its output end is connected to the two threaded rods.

[0014] In some embodiments, a first gear is provided at the bottom of both threaded rods, and a second gear is connected to the output end of the rotary motor, with the first gear meshing with the second gear.

[0015] The beneficial effects of the inner tire changing device for the trough-shaped beam transport vehicle provided by this utility model are as follows: Compared with the prior art, the folding arm in this utility model is rotatably mounted on the lifting platform and can swing up and down. When the folding arm swings out and overlaps the top of the side beam, it can form a stable support structure, which is more convenient than the traditional installation of I-beams fixed by bolts. Furthermore, the lifting component is slidably connected to the folding plate, allowing it to move flexibly on the folding arm and accurately reach the tire installation position, greatly improving the accuracy and efficiency of tire positioning, reducing labor intensity and shortening operation time, making tire repair and installation work more efficient. The lifting drive component can realize the vertical sliding adjustment of the lifting platform. When the folding arm swings and retracts and is in the retracted state, the lifting drive component can drive the lifting platform to descend, storing the folding arm inside the support frame, reducing the space occupied by the device, facilitating the transportation and storage of the device, and enhancing the flexibility and applicability of the device. Attached Figure Description

[0016] Figure 1 A front view schematic diagram of the inner tire changing device of the trough-shaped beam transport vehicle provided in an embodiment of this utility model;

[0017] Figure 2 A three-dimensional structural diagram of the inner tire changing device of the trough-shaped beam transport vehicle provided in this embodiment of the utility model when the folding arm is in working state.

[0018] Figure 3 A three-dimensional structural diagram of the inner tire changing device of the trough-shaped beam transport vehicle provided in the embodiment of this utility model when the folding arm is switched.

[0019] Figure 4 A three-dimensional structural diagram of the inner tire changing device of the trough-shaped beam transport vehicle provided in this embodiment of the utility model when the folding arm is in the retracted state.

[0020] Figure 5 This is a three-dimensional structural diagram of the folding arm used in the embodiment of this utility model;

[0021] Figure 6 This is a three-dimensional structural diagram of the hoisting assembly used in the embodiments of this utility model;

[0022] Figure 7 This is a three-dimensional structural diagram of the support frame used in the embodiment of this utility model;

[0023] Figure 8 This is a three-dimensional structural diagram of the lifting drive component used in the embodiments of this utility model;

[0024] In the diagram: 10. Support frame; 20. Lifting drive component; 21. Threaded rod; 22. Rotary motor; 23. First gear; 24. Second gear; 30. Lifting platform; 40. Folding arm; 41. Rotary drive component; 42. First cantilever; 43. Second cantilever; 44. Transmission assembly; 441. First rod; 442. Second rod; 443. Third rod; 45. Clearance groove; 46. Slide groove; 47. Limiting plate; 50. Lifting assembly; 51. Lifting element; 52. Pulley; 53. Bearing frame; 531. Frame; 532. Lifting rope; 60. Tire; 70. Bottom frame; 80. Side beam. Detailed Implementation

[0025] To make the technical problem to be solved, the technical solution, and the beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0026] It should be noted that when an element is referred to as being "set on" another element, it can be directly on or indirectly on the other element. It should be understood that the terms "upper," "lower," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality of" or "several" means two or more, unless otherwise explicitly specified.

[0027] Please refer to the following: Figures 1 to 5 The present invention provides a description of the inner tire changing device for a trough-shaped beam transport vehicle. The inner tire changing device includes a support frame 10, a lifting platform 30, a folding arm 40, and a hoisting assembly 50. The support frame 10 is fixed to the bottom frame 70 of the beam transport vehicle, and a lifting drive component 20 is provided on the support frame 10. The lifting platform 30 is vertically slidably mounted on the support frame 10 and connected to the lifting drive component 20. The folding arm 40 is rotatably mounted on the lifting platform 30 and used for vertical swinging. The hoisting assembly 50 is slidably connected to the folding arm 40 and used for hoisting the tire 60. The folding arm 40 has a working state where it swings flat and overlaps the top of one side beam 80 of the beam transport vehicle, and a retracted state where it swings and retracts to be close to the support frame 10.

[0028] It should be noted that the support frame 10 is fixed to the bottom frame 70 of the beam transport vehicle, providing a stable base for the entire device. The lifting drive component 20 is installed on the support frame 10, driving the lifting platform 30 to slide vertically along the support frame 10, achieving height positioning of the folding arm 40 and the lifting assembly 50 to meet the vertical space requirements when changing the tires 60. The folding arm 40 can swing up and down around the lifting platform 30. When it swings to a horizontal position, its end rests on the top of the side beam 80 of the beam transport vehicle, forming a support structure spanning the inner tire 60 area; when retracted, it swings to a vertical position, reducing space occupation. This solves the problems of the large size and inconvenient handling of traditional I-beams, and adapts to the narrow working space of the trough-type beam transport vehicle.

[0029] The lifting assembly 50 slides laterally on the folding arm 40 in its working state, moving the lifted tire 60 to the axle installation position. Combined with the height adjustment of the lifting platform 30, this allows for the alignment and installation of the tire 60. The sliding adjustment of the lifting assembly 50 on the folding arm 40 adjusts the lateral position of the tire 60, reducing manual pushing, pulling, and prying operations and improving alignment and installation efficiency.

[0030] Compared with existing technologies, the trough-shaped beam transport vehicle inner tire changing device provided by this utility model features a folding arm 40 that is rotatably mounted on the lifting platform 30 and can swing up and down. When the folding arm 40 swings out and overlaps the top of the side beam 80, it forms a stable support structure, which is more convenient than the traditional installation using I-beams fixed with bolts. Furthermore, the lifting assembly 50 is slidably connected to the folding plate, allowing it to move flexibly on the folding arm 40 and accurately reach the tire 60 installation position, greatly improving the accuracy and efficiency of tire 60 positioning, reducing labor intensity, shortening operation time, and making tire 60 maintenance and installation work more efficient.

[0031] The lifting drive component 20 can realize the vertical sliding adjustment of the lifting platform 30. When the folding arm 40 swings and retracts and is in the retracted state, the lifting drive component 20 can drive the lifting platform 30 to descend, and store the folding arm 40 into the support frame 10, reducing the space occupied by the device, facilitating the transportation and storage of the device, and enhancing the flexibility and applicability of the device.

[0032] Please see Figures 2 to 4 The folding arm 40 includes a rotary drive 41, a first cantilever 42, a second cantilever 43, and a transmission assembly 44. The rotary drive 41 is mounted on the lifting platform 30. The first cantilever 42 is rotatably mounted on the lifting platform 30 and connected to the output end of the rotary drive 41. The second cantilever 43 is hinged to the first cantilever 42. The transmission assembly 44 is mounted on the lifting platform 30 and connected to the first cantilever 42 and the second cantilever 43. When the rotary drive 41 drives the first cantilever 42 to swing up and down, the transmission assembly 44 is used to drive the second cantilever 43 to fold or unfold.

[0033] It should be noted that the rotary drive component 41 can be a motor, installed on the lifting platform 30, with its output end connected to the first cantilever 42. By driving the first cantilever 42 to swing up and down around the lifting platform 30, the folding arm 40 can be unfolded or retracted. The second cantilever 43 is hinged to the first cantilever 42 and can swing up and down around the hinge point. The transmission component 44 connects the first cantilever 42 and the second cantilever 43. When the first cantilever 42 is driven by the rotary drive component 41, the motion is transmitted to the second cantilever 43 through the transmission component 44, causing it to swing synchronously around the hinge point of the first cantilever 42, thereby realizing the overall unfolding or retraction of the folding arm 40.

[0034] When tire 60 is being replaced, the support frame 10 is fixed to the bottom frame 70 of the beam transport vehicle. The lifting platform 30 rises, and the first cantilever 42 swings horizontally. The transmission component 44 drives the second cantilever 43 to unfold synchronously, ultimately forming a horizontal support structure erected on the side beam 80. At this time, the folding arm 40 is in the working state. After tire 60 is replaced, the first cantilever 42 swings vertically, and the transmission component 44 drives the second cantilever 43 to retract synchronously, causing the folding arm 40 to retract to the retracted state. The lifting platform 30 descends, allowing the folding arm 40 to be stored inside the support frame 10. The first cantilever 42 and the second cantilever 43 are hinged to each other, so that the folding arm 40 unfolds into a long-span support structure in the working state, covering the area of ​​the inner tire 60 of the trough-shaped beam transport vehicle; in the retracted state, it retracts into a compact vertical form, adapting to narrow working spaces and solving the problems of inconvenient transportation and difficult installation of traditional fixed supports.

[0035] Please see Figures 2 to 5 The transmission assembly 44 includes a first rod 441, a second rod 442, and a third rod 443. The first rod 441 is rotatably connected to the first cantilever 42 and has two swinging ends that swing up and down. The second rod 442 is rotatably mounted on the second cantilever 43 and is rotatably connected to one of the swinging ends. One end of the third rod 443 is rotatably connected to the lifting platform 30, and the other end is rotatably connected to the other swinging end. The third rod 443 is used to cooperate with the first cantilever 42 to form a parallelogram-shaped four-bar linkage.

[0036] It should be noted that the lifting platform 30, the first cantilever 42, the first rod 441, and the third rod 443 together form a parallelogram-shaped four-bar linkage. The third rod 443 is opposite the first cantilever 42. When the first cantilever 42 swings, the distance between the third rod 443 and the first cantilever 42 changes, thus causing the third rod 443 to drive the first rod 441 to swing on the first cantilever 42. Simultaneously, the first rod 441 forms another four-bar linkage with the second cantilever 43 through the second rod 442. The second rod 442 acts as the connecting rod, and the second cantilever 43 is the driven member, ensuring that the rotation angle of the second cantilever 43 is consistent with that of the first cantilever 42. This ensures that both reach a horizontal position synchronously during deployment and retract to a vertical position synchronously during retraction.

[0037] One end of the third rod 443 is rotatably connected to the lifting platform 30. When the first cantilever 42, which is in a vertical state, rotates to a horizontal state, the distance between the third rod 443 and the first cantilever 42 decreases. Therefore, the third rod 443 can pull the first rod 441 to swing towards the first cantilever 42, thereby driving the other end of the first rod 441 to pull the second cantilever 43 around the hinge point to swing away from the first cantilever 42 through the second rod 442, so as to realize the switching of the working state of the folding arm 40.

[0038] When the first cantilever 42, which is in a horizontal state, rotates to a vertical state, the distance between the first cantilever 42 and the third rod 443 increases. The third rod 443 pushes the first rod 441 to swing toward the second cantilever 43. The first rod 441 pushes the second cantilever 43 to swing around the hinge point through the second rod 442 to get closer to the first cantilever 42, so that the folding arm 40 switches to the retracted state.

[0039] The three-bar transmission assembly 44 utilizes the spatial folding characteristics of the hinge point to form a long-span support when the folding arm 40 is in the working state, and when the folding arm 40 is in the retracted state, it is driven to retract into a narrow space through the rotation between the bars, which is suitable for the compact layout inside the trough-shaped beam transport vehicle and solves the problem of difficult handling caused by the large size of traditional I-beam supports.

[0040] Please see Figure 2 and Figure 3 The first cantilever 42 is provided with a limiting plate 47, which is used to abut against the top of the second cantilever 43 when the second cantilever 43 is opened.

[0041] It should be noted that the limiting plate 47 is fixed to the top of the first cantilever 42 and extends along the length of the first cantilever 42. When the folding arm 40 swings and unfolds to the working state through the rotation drive 41, the limiting plate 47 abuts against the top of the second cantilever 43, preventing the second cantilever 43 from continuing to rotate. The unfolding angle of the folding arm 40 is precisely limited by physical contact, ensuring that its end is accurately placed on the top of the side beam 80.

[0042] Please see Figure 5 Both the first cantilever 42 and the second cantilever 43 are provided with clearance grooves 45 along their length direction. Both sides of the clearance groove 45 are provided with sliding grooves 46. The hoisting assembly 50 is slidably connected to the sliding grooves 46 and extends out of the clearance grooves 45.

[0043] It should be noted that the clearance groove 45 is opened along the length direction perpendicular to the first cantilever 42 and the second cantilever 43, providing storage space for the lifting assembly 50. When the folding arm 40 is extended to the working state, the lifting assembly 50 slides laterally along the side wall groove 46 and extends out of the clearance groove 45, forming a lifting track at the top of the folding arm 40; when the folding arm 40 is retracted to the retracted state, the lifting assembly 50 can retract into the clearance groove 45, avoiding interference with other components of the beam transport vehicle. Furthermore, the first cantilever 42 and the second cantilever 43 each have a groove 46 along their length. When the folding arm 40 is extended to the horizontal working state, the transmission assembly 44 drives the two cantilever arms to rotate synchronously and align, so that the grooves 46 of both cantilever arms form a continuous track in the horizontal direction. This allows the lifting assembly 50 to cover the entire inner tire 60 area, avoiding the problem of limited lateral displacement in traditional single-point suspension and reducing manual handling or prying operations when aligning the tires 60.

[0044] Please see Figure 6 The lifting assembly 50 includes a lifting element 51, two sets of pulleys 52, and a support frame 53; the two sets of pulleys 52 are respectively connected to both sides of the lifting element 51 and are rolled in the groove 46; the support frame 53 is installed on the lifting element 51 and is used to lift the tire 60.

[0045] It should be noted that the lifting element 51 can be an electric hoist, with a lifting hook at the bottom. The lifting element 51 controls the up-and-down movement of the support frame 53 via the hook, and coordinates with the vertical movement of the lifting platform 30 to achieve precise vertical height adjustment of the tire 60. Two sets of pulleys 52 are respectively installed on both sides of the lifting element 51, forming a rolling engagement with the slide groove 46 of the folding arm 40, allowing the lifting element 51 to slide laterally along the slide groove 46, thereby adjusting the horizontal position of the tire 60. The support frame 53 is installed on the hook to fix the tire 60 for lifting. During operation, first, the overall height of the folding arm 40 is adjusted via the lifting platform 30 so that the folding arm 40 is placed on top of the side beam 80. Then, the lifting element 51 is slid laterally to the target position. Finally, the hook is raised and lowered to align the tire 60 with the axle hole, enabling the maintenance and replacement of the tire 60. The lifting element 51 drives the hook to rise and fall and cooperates with the pulley 52 to slide smoothly in the slide groove 46. The height and lateral position can be adjusted without manual pushing, pulling or prying the tire 60, which significantly reduces labor intensity and improves the ease of operation.

[0046] Please see Figure 2 and Figure 6Each set of pulleys 52 includes multiple pulleys 52 arranged in a horizontal direction. Each pulley 52 is used to cooperate with each other to make the lifting element 51 pass smoothly through the intersection of the first cantilever 42 and the second cantilever 43.

[0047] It should be noted that each set of pulleys 52 consists of multiple pulleys 52 arranged horizontally, with each pulley 52 rolling evenly at different positions on the slide groove 46, forming multi-point contact support with the inner wall of the slide groove 46. When the lifting element 51 lifts the tire 60, the weight is synchronously transferred to the folding arm 40 through multiple pulleys 52. Each pulley 52 only bears a portion of the load, avoiding local deformation or tilting caused by excessive force at a single point. Since the pulley sets 52 are symmetrically distributed on both sides of the lifting element 51, and the rolling axis of each pulley 52 is consistent with the direction of the slide groove 46, the swaying tendency of the lifting element 51 caused by the shift of the center of gravity or external interference can be effectively counteracted, achieving stable translation of the lifting element 51.

[0048] When the folding arm 40 is in the working state, the pulley 52 group moves horizontally in the slide groove 46. The lifting element 51 is provided with a row of pulleys 52 along the length direction of the first cantilever 42. When the pulley 52 located in front disengages from the slide groove 46 on the first cantilever 42 and does not enter the slide groove 46 on the second cantilever 43, the remaining pulleys 52 can make the lifting element 51 slide horizontally in the slide groove 46, so that the lifting element 51 can move from the first cantilever 42 to the second cantilever 43.

[0049] Please see Figure 7 The support frame 53 includes two frame bodies 531 and a lifting rope 532. The two frame bodies 531 are hinged together. The two ends of the lifting rope 532 are connected to the two frame bodies 531 respectively, and the lifting rope 532 is hoisted on the lifting element 51.

[0050] It should be noted that the two hinged frames 531 are suspended from the lifting element 51 by ropes 532. When the load-bearing frame 53 suspends the tire 60, the tension of the ropes 532 forces the two frames 531 to rotate around the hinge point, automatically adjusting the opening and closing angle according to the diameter of the tire 60. When lifting a large tire 60, the frame 531 opens outward under the weight of the tire 60, and the ropes 532 become taut; when lifting a small tire 60, the frame 531 closes inward under the tension of the ropes 532, forming a ring-like clamp around the tire 60. The weight of the tire 60 is transferred from the frame 531 to the ropes 532, then concentrated by the ropes 532 to the hook, and finally distributed to the side beam 80 through the lifting element 51, the pulley group 52, and the sliding groove 46 of the folding arm 40. The flexible opening and closing characteristics of the hinged frame 531 ensure that the load is evenly distributed on both sides of the tire 60, avoiding single-point stress. The articulated frame 531 can be quickly opened and closed in confined spaces, and the tire 60 can be loaded and unloaded without tools, avoiding the installation difficulties caused by space limitations of traditional rigid clamps.

[0051] Please see Figure 2 and Figure 8 The lifting drive component 20 includes two threaded rods 21 and a rotary motor 22. The two threaded rods 21 are vertically rotatably mounted on the support frame 10 and are threadedly engaged with the lifting platform 30. The rotary motor 22 is mounted on the lifting platform 30 and its output end is connected to the two threaded rods 21.

[0052] It should be noted that the rotary motor 22 is mounted on the lifting platform 30, and its output end is connected to two threaded rods 21 to achieve synchronous rotation of the threaded rods 21. The two threaded rods 21 are vertically rotatable on the support frame 10 and form a threaded engagement with the lifting platform 30. When the motor drives the threaded rods 21 to rotate, the rotational motion can be converted into the vertical linear motion of the lifting platform 30. Since the two threaded rods 21 rotate synchronously, the load on both sides of the lifting platform 30 can be balanced, avoiding tilting or jamming caused by unilateral torque. The lifting platform 30 is subjected to balanced forces on both sides and can rise and fall smoothly along the guide structure of the support frame 10.

[0053] Please see Figure 8 Both threaded rods 21 are provided with a first gear 23 at their bottom, and the output end of the rotary motor 22 is connected to a second gear 24, with the first gear 23 and the second gear 24 meshing together.

[0054] It should be noted that the output end of the rotary motor 22 is connected to the second gear 24, and each of the two threaded rods 21 has a first gear 23 at its bottom. The second gear 24 meshes with both first gears 23 simultaneously. When the motor starts, the second gear 24 rotates, driving the first gears 23 on both sides to rotate synchronously through tooth meshing, thereby driving the threaded rods 21 to rotate. Due to the rigid transmission characteristics of gear meshing, the rotational speed and direction of the threaded rods 21 on both sides are completely consistent, ensuring that the force on both sides of the lifting platform 30 is balanced.

[0055] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A tire changing device inside a trough-shaped beam transport vehicle, characterized in that, include: A support frame is fixed to the bottom frame of the beam transport vehicle, and the support frame is equipped with a lifting drive component; The lifting platform is vertically slidably mounted on the support frame and connected to the lifting drive component; A folding arm is rotatably mounted on the lifting platform and used for swinging up and down. A lifting assembly, slidably connected to the folding arm, is used for lifting tires; The folding arm has a working state in which it swings out and overlaps the top of one side beam of the beam transport vehicle, and a retracted state in which it swings back and rests against the support frame.

2. The inner tire changing device for the trough-shaped beam transport vehicle as described in claim 1, characterized in that, The folding arm includes: A rotary drive component is mounted on the lifting platform; The first cantilever is rotatably mounted on the lifting platform and connected to the output end of the rotary drive component; The second cantilever is hinged to the first cantilever; A transmission assembly is disposed on the lifting platform and connected to the first cantilever and the second cantilever; When the rotary drive causes the first cantilever to swing up and down, the transmission assembly is used to drive the second cantilever to fold or unfold.

3. The inner tire changing device for the trough-shaped beam transport vehicle as described in claim 2, characterized in that, The transmission assembly includes: The first rod is rotatably connected to the first cantilever and has two swinging ends that swing up and down. The second rod is rotatably mounted on the second cantilever and rotatably connected to one of the swing ends; The third link has one end rotatably connected to the lifting platform and the other end rotatably connected to another swing end. The third link is used to cooperate with the first cantilever to form a parallelogram-shaped four-bar linkage.

4. The inner tire changing device for the trough-shaped beam transport vehicle as described in claim 2, characterized in that, The first cantilever is provided with a limiting plate, which is used to abut against the top of the second cantilever when the second cantilever is opened.

5. The inner tire changing device for the trough-shaped beam transport vehicle as described in claim 2, characterized in that, Both the first cantilever and the second cantilever have clearance grooves along their length. Each clearance groove has a sliding groove on its two opposite sidewalls. The hoisting assembly is slidably connected to the sliding groove and extends out of the clearance groove.

6. The inner tire changing device for the trough-shaped beam transport vehicle as described in claim 5, characterized in that, The hoisting assembly includes: Lifting components; Two sets of pulleys are respectively connected to both sides of the lifting element and are both rolled on the groove; A support frame, mounted on the lifting element, is used for lifting tires.

7. The inner tire changing device for the trough-shaped beam transport vehicle as described in claim 6, characterized in that, Each set of pulleys includes multiple pulleys arranged in a horizontal direction, and each pulley is used to cooperate with each other to allow the lifting element to pass smoothly through the intersection of the first cantilever and the second cantilever.

8. The inner tire changing device for the trough-shaped beam transport vehicle as described in claim 6, characterized in that, The support frame includes two frames and a hoisting rope. The two frames are hinged together. The two ends of the hoisting rope are respectively connected to the two frames and the hoisting rope is suspended on the lifting element.

9. The inner tire changing device for the trough-shaped beam transport vehicle as described in claim 1, characterized in that, The lifting drive component includes two threaded rods and a rotary motor. The two threaded rods are vertically rotatably mounted on the support frame and are threadedly engaged with the lifting platform. The rotary motor is mounted on the lifting platform and its output end is connected to the two threaded rods.

10. The inner tire changing device for the trough-shaped beam transport vehicle as described in claim 9, characterized in that, Both threaded rods are provided with a first gear at their bottom, and the output end of the rotary motor is connected to a second gear, with the first gear meshing with the second gear.

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