Flat car

Abstract

The invention provides a flat car, and belongs to the technical field of machinery. A flat car comprises: a platform; the moving assembly comprises at least two rolling wheel sets, each rolling wheel set comprises a wheel shaft and at least two levers, one end of each lever is connected to the bottom of the platform in a pivoted mode, the wheel shafts are rotationally installed on the levers, the at least two levers are distributed at the two ends of the wheel shafts, and at least two moving wheels are installed on the wheel shafts; the lifting assembly comprises an air spring air bag corresponding to the lever, the air spring air bag is arranged between the lever and the platform, and the air spring air bag is used for driving the lever to move in the direction away from the platform after being inflated, so that the distance between the moving wheels at the two ends of the wheel shaft and the platform is increased; and the driving assembly is at least connected with one wheel shaft and drives the wheel shaft to rotate.

Description

Technical Field

[0001] This invention belongs to the field of mechanical technology, specifically a flatbed cart. Background Technology

[0002] In scenarios involving the transport of heavy cargo weighing 30 tons or more, if the transport platform needs to be raised to a preset height, traditional solutions often use large hydraulic devices as the drive core. However, hydraulic drive solutions require a dedicated hydraulic power source, which not only significantly increases the overall purchase cost of the equipment but may also be accompanied by additional problems such as complex maintenance of the hydraulic system and large space occupation. On the other hand, conventional electric cylinders, due to limitations in structural design and power output characteristics, cannot meet the gravity support requirements under such heavy-load conditions and cannot be directly applied to this scenario. Summary of the Invention

[0003] The purpose of this invention is to address the aforementioned problems in existing technologies by proposing a flatbed vehicle.

[0004] The objective of this invention can be achieved through the following technical solutions: A flatbed cart, comprising: platform; A movable component, comprising at least two sets of roller sets, each roller set including an axle and at least two levers, one end of each lever being pivotally connected to the bottom of the platform, the axle being rotatably mounted on the levers, and at least two levers being distributed at both ends of the axle, and at least two movable wheels being mounted on the axle; A lifting assembly includes an air spring airbag corresponding to the lever, the air spring airbag being disposed between the lever and the platform, wherein the air spring airbag is used to drive the lever to move away from the platform after inflation, so as to increase the distance between the moving wheels at both ends of the axle and the platform; A drive assembly, which is connected to at least one of the axles and drives the axle to rotate.

[0005] In the aforementioned flatbed vehicle, a limiting component is fixed at the bottom of the platform. The limiting component has a limiting hole, and the end of the lever away from the axle enters the limiting hole. The limiting hole is used to limit the swing angle of the lever.

[0006] In the aforementioned flatbed vehicle, the limiting hole of each of the limiting members allows two symmetrically arranged levers to extend into it.

[0007] In the aforementioned flatbed vehicle, several support feet are fixed at the bottom of the platform, and the lever can swing between a first position and a second position. In the first position, the distance between the axle and the platform is the closest, and the support feet provide support. In the second position, the distance between the axle and the platform is the farthest, and the support feet cannot provide support.

[0008] In the aforementioned flatbed truck, one end of the air spring airbag is fixedly connected to the platform, and the other end is connected to the lever.

[0009] In the aforementioned flatbed truck, the air spring airbag is positioned on the lever side closer to the wheel axle.

[0010] In the aforementioned flatbed vehicle, the drive assembly includes a drive motor, a reducer, and a limiting part. The limiting part is installed at the bottom of the platform and has a sliding hole. The drive motor is connected to one of the wheel axles via the reducer to drive the wheel axle to rotate. A connecting rod is pivotally connected to the reducer, and a protruding rod is fixed on the connecting rod. The protruding rod is inserted into the sliding hole and can move within the sliding hole to match the position of the wheel axle.

[0011] In the aforementioned flatbed truck, the platform is made of cast iron, and the surface of the platform is provided with reinforcing ribs.

[0012] In the aforementioned flatbed truck, several lifting rings are fixed on both sides of the platform.

[0013] Compared with the prior art, this application has the following advantages: Using air springs as the lifting power source eliminates the need for a separate, complex hydraulic source compared to traditional hydraulic devices, simplifying the system structure, reducing equipment purchase costs, and making maintenance easier. Air-driven systems are commonly found in general machinery factories, so no additional air source equipment is required. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram in this application; Figure 2 This is a top view in this application; Figure 3 yes Figure 2 A sectional view of AA; Figure 4 This is a schematic diagram showing the lever in the second position in this application; Figure 5 This is a perspective view of the driving component in this application; In the picture, 2. Platform; 21. Reinforcing ribs; 22. Hanging rings; 3. Moving components; 31. Roller assembly; 311. Wheel and axle; 312. Lever; 313. Moving wheel; 4. Lifting assembly; 5. Drive assembly; 51. Drive motor; 52. Reducer; 521. Connecting rod; 5211. Protruding rod; 53. Limiting part; 531. Sliding hole; 6. Limiting component; 61. Limiting hole; 7. Support feet. Detailed Implementation

[0015] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0016] like Figures 1 to 5 As shown, a flatbed vehicle includes: a platform 2, a moving component 3, a lifting component 4, and a drive component 5. The moving component 3 includes at least two sets of roller sets 31. Each roller set 31 includes an axle 311 and at least two levers 312. One end of each lever 312 is pivotally connected to the bottom of the platform 2. The axle 311 is rotatably mounted on the lever 312, and at least two levers 312 are distributed at both ends of the axle 311. At least two moving wheels 313 are mounted on the axle 311. The lifting component 4 includes an air spring airbag corresponding to each lever 312. The air spring airbag is disposed between the lever 312 and the platform 2. After inflation, the air spring airbag drives the lever 312 to move away from the platform 2, thereby increasing the distance between the moving wheels 313 at both ends of the axle 311 and the platform 2, thus lifting the platform 2. The drive component 5 is connected to at least one of the axles 311 and drives the axle 311 to rotate.

[0017] In this application, the air spring bladder of the lifting component 4 is installed between the lever 312 and the platform 2, corresponding one-to-one with the lever 312; when it is necessary to raise the platform 2 to a preset height, the air spring bladder is inflated, and the expansion of the air spring bladder generates thrust, pushing the lever 312 to rotate around the pivot point in a direction away from the platform 2; during the rotation of the lever 312, the vertical distance between the axle 311 and the platform 2 gradually increases, thereby driving the entire platform 2 to rise synchronously; conversely, when the air spring bladder is deflated, the lever 312 rotates in the opposite direction under the action of the weight of the cargo, and the platform 2 descends to the initial position.

[0018] The drive assembly 5 is directly connected to at least one axle 311 and drives the axle 311 to rotate by outputting torque. The axle 311 is fixedly connected to the movable wheel 313. When the axle 311 rotates, it directly drives the movable wheel 313 to roll, thereby driving the entire flatbed to travel in a preset direction to realize the transportation of heavy-duty goods.

[0019] In this application, there are four sets of roller wheel groups 31, which are respectively arranged at the lower part of the platform 2, with each pair of roller wheel groups 31 arranged symmetrically.

[0020] Using air springs as the lifting power source eliminates the need for a separate, complex hydraulic source compared to traditional hydraulic devices, simplifying the system structure, reducing equipment purchase costs, and making maintenance easier. Air-driven systems are commonly found in general machinery factories, so no additional air source equipment is required.

[0021] This application addresses the requirement that the flatness of the top surface of platform 2 be guaranteed to be within 0.2mm when the load is not less than 30 tons and the weight of platform 2 itself is not less than 30 tons, while the flatbed truck has large dimensions: 6 meters long, 2.7 meters wide, and 0.5 meters high. This application can lift platform 2 by 50mm.

[0022] Specifically, a limiting component 6 is fixed at the bottom of the platform 2. The limiting component 6 has a limiting hole 61. The end of the lever 312 away from the axle 311 enters the limiting hole 61. The limiting hole 61 is used to limit the swing angle of the lever 312.

[0023] The limiting component 6, through the limiting hole 61, mechanically constrains the end of the lever 312 away from the axle 311, clearly limiting the maximum swing range of the lever 312 and preventing the lever 312 from swinging beyond its travel due to over-inflation of the air spring or shift in the center of gravity of the cargo. Furthermore, the limiting hole 61 acts as a guide. When bearing a load exceeding 30 tons, if only one end of the lever 312 is pivotally connected, the lever 312 may tilt, causing the platform 2 to tilt. The limiting hole 61 controls the lever 312 to move only up and down.

[0024] When the end of lever 312 abuts against the inner wall of the top of the limiting hole 61, the distance between wheel axle 311 and platform 2 is the smallest; when the end of lever 312 abuts against the inner wall of the bottom of the limiting hole 61, the distance between wheel axle 311 and platform 2 is the largest.

[0025] Specifically, the limiting hole 61 of each limiting member 6 allows two symmetrically arranged levers 312 to extend into it.

[0026] The limiting hole 61 of a single limiting component 6 can simultaneously accommodate two symmetrically arranged levers 312, eliminating the need for a separate limiting component 6 for each lever 312. This significantly reduces the number of limiting components 6 and the installation space occupied, making the component layout at the bottom of the platform 2 more compact and orderly.

[0027] Specifically, the bottom of the platform 2 is fixed with several support feet 7, and the lever 312 can swing between the first position and the second position. In the first position, the distance between the wheel axle 311 and the platform 2 is the closest, and the support feet 7 play a supporting role. In the second position, the distance between the wheel axle 311 and the platform 2 is the farthest, and the support feet 7 cannot play a supporting role.

[0028] After the air spring airbag is deflated, the lever 312 swings to the first position where the wheel axle 311 is closest to the platform 2. At this time, the support foot 7 directly contacts the ground and bears a heavy load of more than 30 tons. The weight of the goods is stably supported by the support foot 7 of the platform 2. At this time, the load on the platform 2 can be picked up or loaded. During this process, the support foot 7 plays a stabilizing role because the center of gravity may deviate.

[0029] The air spring airbag inflates and drives the lever 312 to swing to the second position where the distance between the wheel axle 311 and the platform 2 is the farthest. The moving wheel 313 moves down synchronously with the wheel axle 311 and contacts the ground. The support foot 7 leaves the ground and can no longer provide support. The heavy load is completely borne by the roller wheel assembly 31. The drive component 5 can smoothly drive the flatbed truck to move, realizing the efficient transportation of heavy-duty goods.

[0030] In this application, there are 10 support feet 7, which are respectively set at the bottom of the platform 2.

[0031] Specifically, one end of the air spring airbag is fixedly connected to the platform 2, and the other end is connected to the lever 312.

[0032] Both sides of the air spring airbag are fixedly connected to prevent displacement of the air spring airbag connection position.

[0033] Specifically, the air spring bladder is positioned on the side of the lever 312 closer to the axle 311.

[0034] Specifically, the drive assembly 5 includes a drive motor 51, a reducer 52, and a limiting part 53. The limiting part 53 is installed at the bottom of the platform 2 and has a sliding hole 531. The drive motor 51 is connected to one of the wheel axles 311 through the reducer 52 to drive the wheel axle 311 to rotate. A connecting rod 521 is pivotally connected to the reducer 52, and a protrusion 5211 is fixed on the connecting rod 521. The protrusion 5211 is inserted into the sliding hole 531 and can move within the sliding hole 531 to match the position of the wheel axle 311.

[0035] The drive motor 51 serves as a power source, and its high-speed, low-torque power output is transmitted to the reducer 52, which in turn drives the corresponding wheel axle 311 to rotate.

[0036] The limiting part 53 is fixed to the bottom of the platform 2, and the sliding hole 531 opened on it is long and narrow (an arc-shaped hole that matches the movement trajectory of the wheel axle 311), which serves as a moving guide channel for the protruding rod 5211; during the adjustment of the position of the wheel axle 311, the drive component 5 can also move accordingly to adapt to the displacement of the wheel axle 311 during the lifting process.

[0037] Specifically, platform 2 is made of cast iron, and reinforcing ribs 21 are provided on the surface of platform 2. Platform 2 is made of gray cast iron 300 (HT300).

[0038] Specifically, several lifting rings 22 are fixed on both sides of platform 2. The function of the lifting rings 22 is to secure the ropes.

[0039] It should be noted that all directional indications in the embodiments of the present invention, such as up, down, left, right, front, back, etc., are only used to explain the relative positional relationship and movement of the components in a specific posture, as shown in the attached figure. If the specific posture changes, the directional indication will also change accordingly.

[0040] Furthermore, the use of terms such as "first" and "second" in this invention is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Meanwhile, the word "and / or" throughout the text means including three solutions; for example, "A and / or B" includes solution A, solution B, or a solution that simultaneously satisfies A and B. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0041] All of the above components are general standard parts or components known to those skilled in the art. Their structure and principles can be learned by those skilled in the art through technical manuals or conventional experimental methods.

[0042] The specific embodiments described herein are merely illustrative examples of the invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the invention or exceeding the scope defined by the appended claims.

Claims

1. A flatbed trailer characterized by, include: Platform (2); The moving component (3) includes at least two sets of roller sets (31), each roller set (31) including an axle (311) and at least two levers (312), one end of each lever (312) being pivotally connected to the bottom of the platform (2), the axle (311) being rotatably mounted on the levers (312), and at least two levers (312) being distributed at both ends of the axle (311), and at least two moving wheels (313) being mounted on the axle (311). The lifting assembly (4) includes an air spring airbag corresponding to the lever (312). The air spring airbag is disposed between the lever (312) and the platform (2). The air spring airbag is used to drive the lever (312) to move away from the platform (2) after inflation, so as to increase the distance between the moving wheels (313) at both ends of the axle (311) and the platform (2). A drive assembly (5) is connected to at least one of the axles (311) and drives the axle (311) to rotate.

2. The flatbed cart of claim 1, wherein, The bottom of the platform (2) is fixed with a limiting member (6), and the limiting member (6) has a limiting hole (61). The end of the lever (312) away from the axle (311) enters the limiting hole (61), and the limiting hole (61) is used to limit the swing angle of the lever (312).

3. The flatbed cart of claim 1, wherein, The limiting hole (61) of each of the limiting members (6) allows two symmetrically arranged levers (312) to extend into it.

4. The flatbed cart of claim 1, wherein, The platform (2) has several support feet (7) fixed at its bottom. The lever (312) can swing between a first position and a second position. In the first position, the distance between the axle (311) and the platform (2) is the closest, and the support feet (7) play a supporting role. In the second position, the distance between the axle (311) and the platform (2) is the farthest, and the support feet (7) cannot play a supporting role.

5. The flatbed cart of claim 1, wherein, One end of the air spring airbag is fixedly connected to the platform (2), and the other end is connected to the lever (312).

6. The flatbed cart of claim 5, wherein, The air spring bladder is positioned on the side of the lever (312) closer to the axle (311).

7. The flatbed cart of claim 1, wherein, The drive assembly (5) includes a drive motor (51), a reducer (52), and a limiting part (53). The limiting part (53) is installed at the bottom of the platform (2) and has a sliding hole (531). The drive motor (51) is connected to one of the wheel axles (311) through the reducer (52) to drive the wheel axle (311) to rotate. A connecting rod (521) is pivotally connected to the reducer (52), and a protrusion (5211) is fixed on the connecting rod. The protrusion (5211) is inserted into the sliding hole (531) and can move within the sliding hole (531) to match the position of the wheel axle (311).

8. The flatbed cart of claim 1, wherein, The platform (2) is made of cast iron, and the surface of the platform (2) is provided with reinforcing ribs (21).

9. The flatbed cart of claim 1, wherein, Several lifting rings (22) are fixed on both sides of the platform (2).

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