Laterally retractable low bed semi-trailer

Abstract

This invention relates to the field of flatbed semi-trailer technology and discloses a transversely retractable low-bed semi-trailer, including a vehicle body assembly. A traction rotating body and a ladder assembly are respectively provided at both ends of the vehicle body assembly. A rotating hinge is hinged to one end of the traction rotating body near the vehicle body assembly. A second hydraulic cylinder is hinged to one end inside the traction rotating body. Gooseneck opening and closing beams are hinged to both sides of the traction rotating body, and opening and closing connecting arms are hinged to the gooseneck opening and closing beams. This invention uses the movable ends of the first hydraulic cylinders at both ends of the top of the vehicle body assembly to drive the connecting rod to rise and fall, allowing the bottom ball of the connecting rod to extend to the bottom of the vehicle body assembly for support. This reduces wear on the bottom of the vehicle body assembly during retraction and opening / closing, achieving smooth retraction and opening / closing of the vehicle body assembly. Simultaneously, it avoids the problem of severe wear caused by high-load retraction and opening / closing of the opening and closing components inside the traction rotating body.

Description

Technical Field

[0001] The invention relates to the technical field of flatbed semi-trailers, in particular to a transversely retractable low-bed semi-trailer. Background Art

[0002] At present, the maximum width of the existing low-bed semi-trailer (hereinafter referred to as trailer) can be 3000, but the width adjustment is not suitable for the transportation of special equipment and parts, so special vehicles need to be produced for transportation. The existing vehicles on the market that meet the telescopic width are all heavy-duty trailers, with high transportation costs and poor economy. When there is no extra-wide equipment for transportation, it is particularly obvious to use it as an ordinary trailer.

[0003] However, when the existing telescopic flatbed semi-trailer is telescopic, the friction and wear between the wheels at the bottom of the body and the ground are relatively serious, the telescopic stability of the body on both sides is poor, and high-load wear is easily caused to the connecting parts. In addition, the fence frames on both sides of the body need to be manually adjusted when adjusting the telescopic adjustment with the body, which is inconvenient to operate. Summary of the invention

[0004] The purpose of the present invention is to provide a transversely retractable low-bed semi-trailer, which can achieve smooth extension and retraction of the vehicle body, reduce high-load wear of connecting parts, and can synchronize the fence frames on both sides when the vehicle body is extended and adjusted, making the operation more convenient.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a laterally retractable low-bed semi-trailer comprises a body assembly, wherein a traction rotating body and a ladder assembly are respectively arranged at both ends of the body assembly, a swivel hinged body is hinged at one end of the traction rotating body close to the body assembly, a second hydraulic cylinder is hinged at one end inside the traction rotating body, gooseneck opening and closing beams are respectively hinged at both sides of the traction rotating body, and the gooseneck opening and closing beams are hinged with opening and closing connecting arms, fence frames are arranged at one side edge of the top of two groups of the body assemblies, a first hydraulic cylinder is fixedly installed at the inner corner of the top of the body assembly, a sliding ball is arranged at the bottom of the first hydraulic cylinder, the fence frame comprises an upper connecting rod and a lower connecting rod arranged at the top and the bottom, support rods are arranged equidistantly between the upper connecting rod and the lower connecting rod, a positioning rack is installed on the outer side of the lower connecting rod, a positioning cylinder is arranged at one end of the positioning rack, and a positioning gear is arranged equidistantly on the outer side of the lower connecting rod.

[0006] Preferably, one end of the two groups of gooseneck opening and closing beams is hinged to both sides of the traction rotating body through a pin shaft, and the other ends of the two groups of gooseneck opening and closing beams are respectively fixedly connected to one end of the two groups of vehicle body assemblies.

[0007] Preferably, the gooseneck opening and closing beam is hinged to one end of the rotating hinge body through an opening and closing connecting arm, and the telescopic end of the second hydraulic cylinder is connected to the rotating hinge body.

[0008] Preferably, a latch is installed in the middle of the ladder assembly, and the ladder assembly located on the same side is fixedly connected to one end of the upper connecting rod through the latch.

[0009] Preferably, hinge seats are fixedly installed at equal intervals in the inner walls of the upper connecting rod and the lower connecting rod, and both ends of the support rod are rotated in the inner walls of the hinge seats through pins.

[0010] Preferably, the movable end of the first hydraulic cylinder is fixedly connected to a connecting rod, and both ends of the connecting rod extend to the top and the bottom of the vehicle body assembly respectively.

[0011] Preferably, the top end of the connecting rod is fixedly connected to the lower connecting rod on the same side, and the bottom end of the connecting rod is connected to the sliding ball on the same side.

[0012] Preferably, the positioning gear is sleeved on the outside of the pin shaft at the bottom end of the support rod, and a fixing plate is fixedly installed on the middle part of the outer side of the connecting rod.

[0013] Preferably, the positioning rack and the positioning cylinder are both installed inside the fixing plate.

[0014] Preferably, the positioning rack is a U-shaped structure, and the outer edge of the positioning rack is meshed with the outer edge of the positioning gear.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] The present invention drives the connection rod to rise and fall by the movable ends of the first hydraulic oil cylinders at both ends of the top of the vehicle body assembly, so that the sliding ball at the bottom of the connection rod can extend to the bottom of the vehicle body assembly to support it. In this way, when the vehicle body assembly is telescoped, the sliding ball can reduce the wear on the bottom of the vehicle body assembly, thereby achieving the smooth telescopic opening and closing of the vehicle body assembly, and at the same time, avoiding the problem of severe wear of the opening and closing parts inside the traction rotating body due to high load telescopic opening and closing;

[0017] When the connecting rod in the first hydraulic cylinder of the present invention is extended downward, the fence frame on the top of the body assembly can be lowered synchronously, so that the overall height of the fence frame matches the telescopic opening and closing width of the body assembly, and the telescopic end of the positioning cylinder drives the positioning rack to engage the transmission positioning gear, so that the support rod and the upper connecting rod in the fence frame can swing left and right along the lower connecting rod. In this way, the fence frame on the top of the body assembly can be automatically expanded and closed, which is convenient for carrying goods on the top of the body assembly. When the body of the flatbed semi-trailer is telescopically adjusted, the fence frames on both sides can be adjusted synchronously, and the operation is more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0019] Figure 2It is a schematic diagram of the top view structure of the present invention;

[0020] Figure 3 It is a schematic diagram of the disassembled structure of the opening and closing gooseneck assembly in the present invention;

[0021] Figure 4 It is a schematic diagram of the side section structure of the vehicle body in the present invention;

[0022] Figure 5 This is a schematic diagram of the separation structure of the fence frame and the vehicle body in the present invention;

[0023] Figure 6 for Figure 5 Schematic diagram of the local enlarged structure at point A in the middle.

[0024] In the figure: 1. vehicle body assembly; 2. traction rotating body; 3. gooseneck opening and closing beam; 4. ladder assembly; 5. fence frame; 6. first hydraulic cylinder; 7. sliding ball; 8. positioning rack; 9. positioning cylinder; 10. positioning gear; 21. rotating hinge; 22. second hydraulic cylinder; 31. opening and closing connecting arm; 41. latch; 51. upper connecting rod; 52. lower connecting rod; 53. support rod; 54. articulated seat; 61. connecting rod. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. The described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0026] Embodiment 1:

[0027] This embodiment introduces a transversely retractable low-bed semi-trailer. Figure 1-Figure 6 As shown, the transversely retractable low-bed semi-trailer includes a vehicle body assembly 1, a traction rotating body 2 and a ladder assembly 4 are respectively arranged at both ends of the vehicle body assembly 1, a rotating articulated body 21 is hingedly connected to one end of the traction rotating body 2 close to the vehicle body assembly 1, a second hydraulic cylinder 22 is hingedly connected to one end of the traction rotating body 2, and gooseneck opening and closing beams 3 are respectively hingedly connected to both sides of the traction rotating body 2;

[0028] The traction rotating body 2 can control the rotation of the rotating articulated body 21 through the internal second hydraulic cylinder 22, so that the gooseneck opening and closing beams 3 on both sides can be telescopically opened and closed through the opening and closing connecting arms 31. Due to the elimination of the main longitudinal beam of the vehicle, the curb weight of the telescopic low-bed semi-trailer is reduced by 2 to 3 tons compared with similar products, and the telescopic working condition in the vehicle width direction of 2550mm to 4300mm can be achieved. It can be used as an ordinary low-bed semi-trailer, and can also be used for the transportation of special ultra-wide equipment;

[0029] The movable ends of the first hydraulic cylinders 6 at both ends of the top of the vehicle body assembly 1 drive the connecting rod 61 to rise and fall, so that the sliding ball 7 at the bottom of the connecting rod 61 can extend to the bottom of the vehicle body assembly 1 to support it. In this way, when the vehicle body assembly 1 is telescopically opened and closed, the sliding ball 7 can reduce the wear on the bottom of the vehicle body assembly 1, thereby achieving the smoothness of the telescopic opening and closing of the vehicle body assembly 1, and at the same time, avoiding the problem of severe wear of the opening and closing parts inside the traction rotating body 2 due to high load telescopic opening and closing;

[0030] Among them, one end of the two groups of gooseneck opening and closing beams 3 is hinged on both sides of the traction rotating body 2 through a pin shaft, and the other ends of the two groups of gooseneck opening and closing beams 3 are respectively fixedly connected to one end of the two groups of vehicle body assemblies 1. The gooseneck opening and closing beams 3 are hinged to one end of the rotating hinge body 21 through an opening and closing connecting arm 31, and the telescopic end of the second hydraulic cylinder 22 is connected to the rotating hinge body 21. The traction rotating body 2 can control the rotation of the rotating hinge body 21 through the internal second hydraulic cylinder 22, so that the gooseneck opening and closing beams 3 on both sides can be telescopically opened and closed through the opening and closing connecting arm 31.

[0031] Among them, a pin 41 is installed in the middle of the ladder assembly 4, and the ladder assembly 4 on the same side is fixedly connected to one end of the upper connecting rod 51 through the pin 41. The fence frame 5 can be deployed through the hydraulic control of the support rod to enclose both sides of the vehicle body assembly 1. The pin 41 installed on the ladder assembly 4 can be disassembled and positioned with the rear end of the fence frame 5 on the same side, thereby ensuring the stability of the adjustable support of the fence frame 5.

[0032] Among them, the top end of the connecting rod 61 is fixedly connected to the lower connecting rod 52 on the same side, and the bottom end of the connecting rod 61 is connected to the sliding ball 7 on the same side. The connecting rod 61 is driven to rise and fall by the movable ends of the first hydraulic cylinders 6 at both ends of the top of the vehicle body assembly 1, so that the sliding ball 7 at the bottom end of the connecting rod 61 can extend to the bottom of the vehicle body assembly 1 to support it. In this way, when the vehicle body assembly 1 is telescoped and opened, the sliding ball 7 can reduce the wear on the bottom of the vehicle body assembly 1, thereby achieving the smoothness of the telescopic opening and closing of the vehicle body assembly 1.

[0033] Embodiment 2:

[0034] Based on Example 1, this example introduces a transversely retractable low-bed semi-trailer. Figure 4-Figure 6 As shown, the gooseneck opening and closing beam 3 is hinged with an opening and closing connecting arm 31, and a fence frame 5 is arranged at the edge of one side of the top of the two groups of vehicle body assemblies 1. A first hydraulic oil cylinder 6 is fixedly installed at the inner corner of the top of the vehicle body assembly 1, and a sliding ball 7 is arranged at the bottom of the first hydraulic oil cylinder 6. The fence frame 5 includes an upper connecting rod 51 and a lower connecting rod 52 arranged at the top and the bottom, and a support rod 53 is arranged between the upper connecting rod 51 and the lower connecting rod 52 at equal intervals. A positioning rack 8 is installed on the outer side of the lower connecting rod 52, and a positioning cylinder 9 is arranged at one end of the positioning rack 8. Positioning gears 10 are arranged at equal intervals on the outer side of the lower connecting rod 52;

[0035] When the connecting rod 61 in the first hydraulic cylinder 6 extends downward, the fence frame 5 on the top of the body assembly 1 can be lowered synchronously, so that the overall height of the fence frame 5 matches the telescopic opening and closing width of the body assembly 1, and the telescopic end of the positioning cylinder 9 drives the positioning rack 8 to engage the transmission positioning gear 10, so that the support rod 53 and the upper connecting rod 51 in the fence frame 5 can swing left and right along the lower connecting rod 52, so that the fence frame 5 on the top of the body assembly 1 can be automatically expanded and closed, which is convenient for handling goods on the top of the body assembly 1, and when the body of the flatbed semi-trailer is telescopically adjusted, the fence frames 5 on both sides can be adjusted synchronously, and the operation is more convenient.

[0036] Among them, the movable end of the first hydraulic cylinder 6 is fixedly connected with a connecting rod 61, and the two ends of the connecting rod 61 extend to the top and the bottom of the vehicle body assembly 1 respectively. When the connecting rod 61 in the first hydraulic cylinder 6 extends downward, the fence frame 5 on the top of the vehicle body assembly 1 can be lowered synchronously, so that the overall height of the fence frame 5 matches the telescopic opening and closing width of the vehicle body assembly 1.

[0037] Among them, the positioning gear 10 is sleeved on the outside of the pin shaft at the bottom end of the support rod 53, and a fixing plate is fixedly installed on the middle part of the outer side of the connecting rod 61. The positioning rack 8 and the positioning cylinder 9 are both installed inside the fixing plate. The positioning rack 8 is a U-shaped structure, and the outer edge of the positioning rack 8 is meshed with the outer edge of the positioning gear 10. The telescopic end of the positioning cylinder 9 drives the positioning rack 8 to mesh with the transmission positioning gear 10, so that the support rod 53 and the upper connecting rod 51 in the fence frame 5 can swing left and right along the lower connecting rod 52. In this way, the fence frame 5 on the top of the body assembly 1 can be automatically unfolded and closed, which is convenient for handling goods on the top of the body assembly 1, and when the body of the flatbed semi-trailer is telescopically adjusted, the fence frames 5 on both sides can be adjusted synchronously, and the operation is more convenient.

[0038] Among them, hinge seats 54 are fixedly installed at equal intervals in the inner walls of the upper connecting rod 51 and the lower connecting rod 52, and both ends of the support rod 53 are rotated in the inner walls of the hinge seat 54 through pins. The telescopic end of the positioning cylinder 9 drives the positioning rack 8 to engage the transmission positioning gear 10, so that the support rod 53 and the upper connecting rod 51 in the fence frame 5 can swing left and right along the lower connecting rod 52, so that the fence frame 5 on the top of the vehicle body assembly 1 can automatically expand and close.

[0039] Working principle: When the flatbed semi-trailer is telescopically adjusted, the movable ends of the first hydraulic cylinders 6 at both ends of the top of the body assembly 1 are used to drive the connecting rod 61 to rise and fall, so that the sliding ball 7 at the bottom of the connecting rod 61 can extend to the bottom of the body assembly 1 to support it;

[0040] The first hydraulic cylinder 6 is installed at the two side ends of the vehicle body assembly 1, and there are four groups in total. When the telescopic end connecting rod 61 of the first hydraulic cylinder 6 is telescoped, it can synchronously adjust the fence frames 5 on both sides of the top of the vehicle body assembly 1 and the top of the sliding ball 7.

[0041] Then, the traction rotating body 2 can control the rotation of the rotating hinge body 21 through the internal second hydraulic oil cylinder 22, so that the gooseneck opening and closing beams 3 on both sides can be telescopically opened and closed through the opening and closing connecting arms 31. In this way, when the vehicle body assembly 1 is telescopically opened and closed, the sliding ball 7 can reduce the wear on the bottom of the vehicle body assembly 1, and achieve the smoothness of the telescopic opening and closing of the vehicle body assembly 1. At the same time, the problem of high load telescopic opening and closing of the internal opening and closing parts of the traction rotating body 2 and severe wear is avoided;

[0042] Finally, when adjusting the fence frame 5 on the flatbed semi-trailer, when the connecting rod 61 in the first hydraulic cylinder 6 is extended downward, the fence frame 5 on the top of the body assembly 1 can be lowered synchronously, so that the overall height of the fence frame 5 matches the telescopic opening and closing width of the body assembly 1, and the telescopic end of the positioning cylinder 9 drives the positioning rack 8 to engage the transmission positioning gear 10, so that the support rod 53 and the upper connecting rod 51 in the fence frame 5 can swing left and right along the lower connecting rod 52, so that the fence frame 5 on the top of the body assembly 1 can be automatically expanded and closed, which is convenient for handling goods on the top of the body assembly 1, and when the body of the flatbed semi-trailer is telescopically adjusted, the fence frames 5 on both sides can be adjusted synchronously, and the operation is more convenient.

[0043] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes and modifications may be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A transversely retractable low bed semi-trailer, comprising a vehicle body assembly (1), characterized in that: The vehicle body assembly (1) is provided with a traction rotating body (2) and a ladder assembly (4) at both ends thereof, the traction rotating body (2) is hingedly connected to a rotating articulated body (21) at one end thereof close to the vehicle body assembly (1), a second hydraulic oil cylinder (22) is hingedly connected to one end thereof inside the traction rotating body (2), gooseneck opening and closing beams (3) are hingedly connected to the two sides of the traction rotating body (2), the gooseneck opening and closing beams (3) are hingedly connected to an opening and closing connecting arm (31), the gooseneck opening and closing beams (3) are hingedly connected to one end of the rotating articulated body (21) via the opening and closing connecting arm (31), and the telescopic end of the second hydraulic oil cylinder (22) is connected to the rotating articulated body (21); A fence frame (5) is provided at the edge of one side of the top of the two groups of vehicle body assemblies (1), and the fence frame (5) includes an upper connecting rod (51) and a lower connecting rod (52) arranged at the top and the bottom, and a support rod (53) is arranged at an equal interval between the upper connecting rod (51) and the lower connecting rod (52). A positioning rack (8) is installed on the outer side of the lower connecting rod (52), and a positioning cylinder (9) is arranged at one end of the positioning rack (8). Positioning gears (10) are arranged at an equal interval on the outer side of the lower connecting rod (52), and the positioning gears (10) are sleeved on the outside of the pin shaft at the bottom end of the support rod (53). The positioning rack (8) is a U-shaped structure, and the outer edge of the positioning rack (8) is meshed with the outer edge of the positioning gear (10); A first hydraulic cylinder (6) is fixedly installed at the inner corner of the top of the vehicle body assembly (1), a sliding ball (7) is arranged at the bottom of the first hydraulic cylinder (6), a connecting rod (61) is fixedly connected to the movable end of the first hydraulic cylinder (6), two ends of the connecting rod (61) respectively extend to the top and bottom of the vehicle body assembly (1), the top end of the connecting rod (61) is fixedly connected to the lower connecting rod (52) on the same side, and the bottom end of the connecting rod (61) is connected to the sliding ball (7) on the same side, a fixing plate is fixedly installed in the middle of the outer side of the connecting rod (61), and the positioning rack (8) and the positioning cylinder (9) are both installed inside the fixing plate.

2. The transversely retractable low-bed semi-trailer according to claim 1, characterized in that: One end of the two groups of gooseneck opening and closing beams (3) is hinged to the two sides of the traction rotating body (2) through a pin shaft, and the other end of the two groups of gooseneck opening and closing beams (3) is fixedly connected to one end of the two groups of vehicle body assemblies (1) respectively.

3. The laterally retractable low-bed semi-trailer according to claim 1, characterized in that: A latch (41) is installed in the middle of the ladder assembly (4), and the ladder assembly (4) located on the same side is fixedly connected to one end of the upper connecting rod (51) via the latch (41).

4. The laterally retractable low-bed semi-trailer according to claim 1, characterized in that: Hinge seats (54) are fixedly installed at equal intervals in the inner walls of the upper connecting rod (51) and the lower connecting rod (52), and both ends of the support rod (53) are rotated in the inner walls of the hinge seats (54) through pins.

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