Folding ladder stand mechanism of flat transport vehicle

Abstract

The utility model relates to a folding ladder stand mechanism of a flat transport vehicle, and belongs to the technical field of hydraulic folding ladder stands. Comprising a vehicle head and a vehicle body, a folding ladder stand mechanism is hinged to the tail of the vehicle body and comprises a front ladder stand and a rear ladder stand, the front ladder stand and the rear ladder stand are connected through a hinge mechanism, and a hydraulic oil cylinder is arranged between the vehicle body and the front ladder stand; the hinge mechanism comprises a first hinge assembly and a second hinge assembly, the first hinge assembly comprises a first connecting rod, a second connecting rod and a third connecting rod, one end of the first connecting rod is hinged to the vehicle body, the other end of the first connecting rod is hinged to the second connecting rod and the third connecting rod, and the second connecting rod and the third connecting rod are hinged to the front ladder stand and the rear ladder stand respectively. The utility model provides a folding ladder stand mechanism of a flat plate transport vehicle, which enables a rear ladder stand and a front ladder stand to move in the same direction through mutual matching in the use process, prevents the rear ladder stand from continuously moving downwards to jack up a vehicle or prevent the mechanism from being stuck, and ensures the normal operation of the device.

Description

Technical Field

[0001] The utility model relates to a folding ladder mechanism for a flatbed transporter, belonging to the technical field of hydraulic folding ladders. Background Art

[0002] With the continuous development of China's economy and the increasing improvement of infrastructure construction, a series of construction machinery such as excavators, rotary drilling rigs, asphalt pavers, and shield machines are used more and more widely. The transportation market for construction machinery is becoming increasingly mature, and a series of special vehicles for transporting construction machinery have emerged. The flatbed transporter, also known as a construction machinery transporter, a flatbed truck, or a low-bed transporter, is mainly used to transport non-detachable objects such as excavators, loaders, and harvesters. The flatbed transporter is a common large-scale heavy truck in life, and this type of vehicle is generally widely used in factories, construction sites, and other large-scale production or project locations. The strong load-bearing capacity of the flatbed transporter plays an important role in the process of economic development.

[0003] However, most of the existing ladders of semi-trailers are relatively fixed and cannot be folded. As a result, the length of the ladder is short, the slope of the ladder is steep, and it is inconvenient to carry goods. The foldable ladders are divided into foldable ladders without a driving mechanism, foldable ladders with a driving mechanism for the front ladder, and foldable ladders with a driving mechanism for the rear ladder. For the foldable ladders without a driving mechanism, the two ladders need to be operated separately, which is relatively laborious. For the foldable ladders with a driving mechanism for the front ladder, due to the action of gravity, the rear ladder has a wrong movement in the direction of the front of the vehicle when contacting the ground, and manual assistance is required, resulting in low safety during use. For the foldable ladders with a driving mechanism for the rear ladder, the mechanism is long and the cost is high. Summary of the Utility Model

[0004] The utility model provides a folding ladder mechanism for a flatbed transporter to solve the problems in the prior art that the fixed ladder has a short length, a steep slope, and is inconvenient for carrying goods, while the foldable ladder needs to be operated separately, which is relatively laborious, and requires manual assistance, resulting in low safety during use.

[0005] The utility model provides a folding ladder mechanism for a flatbed transporter, which includes a vehicle head, a vehicle body, and a folding ladder mechanism hinged to the tail of the vehicle body. The folding ladder mechanism includes a front ladder and a rear ladder, and the front ladder and the rear ladder are connected by a hinged mechanism. A hydraulic cylinder is provided between the vehicle body and the front ladder.

[0006] The hinged mechanism includes a first hinged component and a second hinged component. The first hinged component includes a first connecting rod, a second connecting rod, and a third connecting rod. One end of the first connecting rod is hinged to the vehicle body, and the other end is provided with a waist-shaped hole hinged to the second connecting rod and the third connecting rod. The ends of the second connecting rod and the third connecting rod away from the first connecting rod are respectively hinged to the front ladder and the rear ladder.

[0007] Preferably, support seats are provided on both the rear of the vehicle body and the front climbing ladder, and both ends of the hydraulic cylinder are hinged to the support seats.

[0008] Preferably, the front climbing ladder and the first connecting rod are both hinged to the rear of the vehicle body, and the front climbing ladder is located above the first connecting rod.

[0009] Preferably, one ends of the second connecting rod and the third connecting rod are hinged to each other, and the hinge point slides along the inner edge of the waist-shaped hole within the waist-shaped hole.

[0010] Preferably, a chute corresponding to the third connecting rod is provided on the rear climbing ladder, and the hinge point of the third connecting rod and the rear climbing ladder slides along the chute within the chute.

[0011] Preferably, the second hinge assembly is located above the first hinge assembly, and the second hinge assembly is respectively connected to the tops of the front climbing ladder and the rear climbing ladder.

[0012] Preferably, the second hinge assembly includes a fourth connecting rod and a fifth connecting rod. One ends of the fourth connecting rod and the fifth connecting rod are respectively hinged to the tops of the front climbing ladder and the rear climbing ladder, and the other ends of the fourth connecting rod and the fifth connecting rod are hinged to each other.

[0013] Preferably, support columns are hinged on one side of the top of the front climbing ladder close to the rear climbing ladder, and the support columns are located at both ends of the front climbing ladder.

[0014] Preferably, support legs are provided on both sides of the vehicle body. The support legs include a first telescopic rod and a second telescopic rod. The first telescopic rod is horizontally arranged and fixedly connected to the vehicle body, the second telescopic rod is fixedly connected to the telescopic end of the first telescopic rod and is vertically arranged, and a support assembly is provided at the telescopic end of the second telescopic rod.

[0015] Preferably, the support assembly includes a first support plate and a second support plate. The first support plate is fixedly connected to the second telescopic rod, the second support plate is connected to the first support plate by a thread, a handle is provided on the second support plate, one end of the handle is hinged to the second support plate and a corresponding torsion spring is provided, and a buckle assembly corresponding to the handle is provided on the first support plate.

[0016] Advantages of the present utility model:

[0017] The present utility model provides a folding ladder mechanism for a flatbed transporter. During use, the first connecting rod 4, the second connecting rod 5, the third connecting rod 6 and the second hinge assembly cooperate with each other to make the movement directions of the rear climbing ladder and the front climbing ladder the same, ensuring that the rear climbing ladder has moved backward when it contacts the ground, and preventing the rear climbing ladder from continuing to move downward to jack up the vehicle or cause the mechanism to jam, thus ensuring the normal operation of the device. Description of the Drawings

[0018] Figure 1 This is a schematic structural diagram of a folding ladder mechanism for a flatbed transporter of the present utility model.

[0019] Figure 2 This is a schematic structural diagram of the folding ladder mechanism of a folding ladder mechanism for a flatbed transporter of the present utility model.

[0020] Figure 3 This is an unfolded schematic diagram of the folding ladder mechanism of a folding ladder mechanism for a flatbed transporter of the present utility model.

[0021] Figure 4 This is another unfolded schematic diagram of the folding ladder mechanism of a folding ladder mechanism for a flatbed transporter of the present utility model.

[0022] Figure 5 This is a schematic structural diagram of the support leg of a folding ladder mechanism for a flatbed transporter of the present utility model.

[0023] Figure 6 This is an exploded schematic structural diagram of the support leg of a folding ladder mechanism for a flatbed transporter of the present utility model.

[0024] Figure 7 This is another exploded schematic structural diagram of the support leg of a folding ladder mechanism for a flatbed transporter of the present utility model.

[0025] Figure 8 This is a partial schematic structural diagram of the support leg of a folding ladder mechanism for a flatbed transporter of the present utility model.

[0026] (1, cab; 2, vehicle body; 3, folding ladder mechanism; 301, front ladder; 302, rear ladder; 4, first connecting rod; 5, second connecting rod; 6, third connecting rod; 7, hydraulic cylinder; 8, fourth connecting rod; 9, fifth connecting rod; 10, support column; 11, first telescopic rod; 12, second telescopic rod; 13, first support plate; 14, second support plate; 15, handle; 16, buckle assembly) Detailed implementation manners

[0027] Embodiment 1: The following will be combined with the attached Figure 1-4 , and the preferred embodiments of the present utility model will be described in detail.

[0028] The present utility model provides a folding ladder mechanism for a flatbed transporter, which includes a cab 1, a vehicle body 2, and a folding ladder mechanism 3 is hinged to the rear of the vehicle body. The folding ladder mechanism 3 includes a front ladder 301 and a rear ladder 302. The front ladder 301 and the rear ladder 302 are connected through a hinge mechanism. A hydraulic cylinder 7 is provided between the vehicle body 2 and the front ladder 301. Support seats are provided on both the rear of the vehicle body 2 and the front ladder 301. Both ends of the hydraulic cylinder 7 are hinged to the support seats;

[0029] The articulated mechanism includes a first articulated component and a second articulated component. The first articulated component and the second articulated component are symmetrically arranged on both sides between the front ladder 301 and the rear ladder 302. The first articulated component includes a first connecting rod 4, a second connecting rod 5, and a third connecting rod 6. One end of the first connecting rod 4 is articulated with the vehicle body 2, and the other end is provided with a waist-shaped hole for articulating with the second connecting rod 5 and the third connecting rod 6. One ends of the second connecting rod 5 and the third connecting rod 6 are articulated with each other, and the articulation point is located inside the waist-shaped hole and slides along the waist-shaped hole. The ends of the second connecting rod 5 and the third connecting rod 6 away from the first connecting rod 4 are respectively articulated with the front ladder 301 and the rear ladder 302. A chute corresponding to the third connecting rod 6 is provided on the rear ladder 302, and the articulation point of the third connecting rod 6 and the rear ladder 302 is located inside the chute and slides along the chute.

[0030] In this embodiment, the front ladder 301 and the first connecting rod 4 are both articulated with the tail of the vehicle body 2, and the front ladder 301 is located above the first connecting rod 4.

[0031] In this embodiment, the second articulated component is located above the first articulated component, and the second articulated component is respectively connected to the tops of the front ladder 301 and the rear ladder 302.

[0032] In this embodiment, the second articulated component includes a fourth connecting rod 8 and a fifth connecting rod 9. One ends of the fourth connecting rod 8 and the fifth connecting rod 9 are respectively articulated with the tops of the front ladder 301 and the rear ladder 302, and the other ends of the fourth connecting rod 8 and the fifth connecting rod 9 are articulated with each other.

[0033] In this embodiment, a support column 10 is articulated on one side of the top of the front ladder 301 close to the rear ladder 302, and the support column 10 is located at both ends of the front ladder 301.

[0034] In this embodiment, when in use, the hydraulic cylinder 7 starts to contract, driving the folding ladder mechanism 3 to start to rotate clockwise and downward. The front ladder 301 starts to tilt. Under the action of gravity, the rear ladder 302 also starts to open. The rear ladder 302 rotates around the articulation point of the fourth connecting rod 8 and the fifth connecting rod 9. At the same time, the articulation points of the second connecting rod 5 and the third connecting rod 6 slide in the waist-shaped groove, and at the same time, the third connecting rod 6 slides in the chute inside the rear ladder 302 to prevent the rear ladder from getting stuck. When the front ladder 301 and the rear ladder 302 are fully unfolded, the support column 10 vertically supports the folding ladder mechanism under the action of gravity.

[0035] Embodiment 2: During the use of the above embodiment, the flatbed transporter usually transports heavy goods, and the vehicle body 2 is prone to instability. Therefore, the solution of the above embodiment is further improved, such as Figure 5-8 shown:

[0036] In this embodiment, support legs are provided on both sides of the vehicle body 2. The support legs include a first telescopic rod 11 and a second telescopic rod 12. The first telescopic rod 11 is horizontally arranged and fixedly connected to the vehicle body 2. The second telescopic rod 12 is fixedly connected to the telescopic end of the first telescopic rod 11 and is vertically arranged. A support assembly is provided at the telescopic end of the second telescopic rod 12.

[0037] In this embodiment, the support assembly includes a first support plate 13 and a second support plate 14. The first support plate 13 is fixedly connected to the second telescopic rod 12. The second support plate 14 is connected to the first support plate 13 by threads. A handle 15 is provided on the second support plate 14. One end of the handle 15 is hinged to the second support plate 14 and is provided with a corresponding torsion spring. A buckle assembly 16 corresponding to the handle 15 is provided on the first support plate 13.

[0038] During use, the first telescopic rod 11 extends and retracts to both sides, and then the second telescopic rod 12 drives the support assembly to move downward to support the vehicle body. During the use process, hard objects such as stones are likely to damage the second support plate 14 on the ground. When the second support plate 14 is damaged, the second support plate 14 is separated from the first support plate 13 by pulling the handle 15 to rotate the second support plate 14, and the second support plate 14 is replaced.

[0039] The above describes the present invention and its implementation manners. This description is not restrictive. What is shown in the drawings is only one of the implementation manners of the present invention, and the actual structure is not limited thereto. Generally speaking, if those of ordinary skill in the art are inspired by it and, without departing from the gist of the creation of the present invention, design similar structural manners and embodiments to this technical solution without creative efforts, they shall fall within the protection scope of the present invention.

Claims

1. A folding ladder mechanism for a flatbed transporter, comprising a vehicle head (1), a vehicle body (2), and a folding ladder mechanism (3) hinged to the rear of the vehicle body, characterized in that: The folding ladder mechanism (3) includes a front ladder (301) and a rear ladder (302). The front ladder (301) and the rear ladder (302) are connected by a hinge mechanism. A hydraulic cylinder (7) is provided between the vehicle body (2) and the front ladder (301). The hinge mechanism includes a first hinge assembly and a second hinge assembly. The first hinge assembly includes a first connecting rod (4), a second connecting rod (5), and a third connecting rod (6). One end of the first connecting rod (4) is hinged to the vehicle body (2), and the other end is provided with a waist-shaped hole for hinging with the second connecting rod (5) and the third connecting rod (6). The ends of the second connecting rod (5) and the third connecting rod (6) away from the first connecting rod (4) are respectively hinged to the front ladder (301) and the rear ladder (302).

2. The folding ladder mechanism of a flatbed transporter according to claim 1, characterized in that: Support seats are provided at the tail of the vehicle body (2) and on the front ladder (301). Both ends of the hydraulic cylinder (7) are hinged to the support seats.

3. The folding ladder mechanism of a flatbed transporter according to claim 1, characterized in that: The front ladder (301) and the first connecting rod (4) are both hinged to the tail of the vehicle body (2), and the front ladder (301) is located above the first connecting rod (4).

4. The folding ladder mechanism of a flatbed transporter according to claim 1, characterized in that: One end of the second connecting rod (5) and the third connecting rod (6) are hinged to each other, and the hinge point slides along the inner edge of the waist-shaped hole within the waist-shaped hole.

5. The folding ladder mechanism of a flatbed transporter according to claim 1, characterized in that: A chute corresponding to the third connecting rod (6) is provided on the rear ladder (302), and the hinge point of the third connecting rod (6) and the rear ladder (302) slides along the chute within the chute.

6. The folding ladder mechanism of a flatbed transporter according to claim 1, wherein: The second hinge assembly is located above the first hinge assembly, and the second hinge assembly is respectively connected to the tops of the front ladder (301) and the rear ladder (302).

7. The folding ladder mechanism of a flatbed transporter according to claim 1, characterized in that: The second hinge assembly includes a fourth connecting rod (8) and a fifth connecting rod (9). One end of the fourth connecting rod (8) and the fifth connecting rod (9) are respectively hinged to the tops of the front ladder (301) and the rear ladder (302), and the other ends of the fourth connecting rod (8) and the fifth connecting rod (9) are hinged to each other.

8. The folding ladder mechanism of a flatbed transporter according to claim 1, characterized in that: A support column (10) is hinged on the side of the top of the front ladder (301) close to the rear ladder (302), and the support column (10) is located at both ends of the front ladder (301).

9. The folding ladder mechanism of a flatbed transporter according to claim 1, wherein: Support legs are provided on both sides of the vehicle body (2). The support legs include a first telescopic rod (11) and a second telescopic rod (12). The first telescopic rod (11) is horizontally arranged and fixedly connected to the vehicle body (2), and the second telescopic rod (12) is fixedly connected to the telescopic end of the first telescopic rod (11) and is vertically arranged. A support assembly is provided at the telescopic end of the second telescopic rod (12).

10. The folding ladder mechanism of a flatbed transporter according to claim 9, characterized in that: The support assembly includes a first support plate (13) and a second support plate (14). The first support plate (13) is fixedly connected to the second telescopic rod (12). The second support plate (14) is connected to the first support plate (13) by a thread. A handle (15) is provided on the second support plate (14). One end of the handle (15) is hinged to the second support plate (14) and is provided with a corresponding torsion spring. A buckle assembly (16) corresponding to the handle (15) is provided on the first support plate (13).

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