Folding ladder stand of low flat-bed semitrailer

Abstract

The utility model discloses a folding ladder stand of a low flat-bed semitrailer, which relates to the technical field of low flat-bed semitrailers and comprises a mounting component and a length adjusting component. The mounting assembly comprises a frame, a mounting groove is formed in one side of the frame, an electric hydraulic cylinder is arranged on one side of the inner wall of the mounting groove, a U-shaped frame is arranged at the output end of the electric hydraulic cylinder, a supporting shaft is rotationally inserted into one side of the U-shaped frame through a bearing, and the middle of the supporting shaft is sleeved with a main ladder climbing plate; the device has the advantages that the output shaft of the second positive and negative rotation motor is controlled to rotate to drive the second worm to rotate, the second worm rotates to drive the second worm gear to rotate through meshing fit with the second worm gear, and the second worm gear rotates to drive the screw to rotate; and the screw rod rotates and is in threaded fit with the threaded hole to drive the lengthened ladder stand plate to transversely slide and displace in the rectangular groove, so that the overall length of the ladder stand is adjusted, and the technical problem that the length of the ladder stand plate is inconvenient to adjust better is solved.

Description

Technical Field

[0001] The utility model relates to a ladder, in particular to a folding ladder for a low-bed semi-trailer, and belongs to the technical field of low-bed semi-trailers. Background Art

[0002] Low bed semi-trailers are usually used to transport heavy vehicles (such as tractors, buses, special vehicles, etc.), rail vehicles, mining machinery, forestry machinery, construction machinery (such as excavators, bulldozers, loaders, pavers, cranes, etc.) and other heavy-loaded goods. The lower the center of gravity, the better the stability and safety, and the stronger the ability to transport extra-high goods and pass overhead obstacles. When transporting vehicles, low bed semi-trailers often use retractable folding ladders.

[0003] Among them, the application number is "CN202022668243.6", which is a hydraulic folding ladder for a low-bed semi-trailer, comprising a frame, a storage slot is provided on the side wall of the frame, a ladder board is provided in the storage slot, a driving mechanism for driving the ladder board to slide and tilt is provided in the storage slot, a control slot is provided on the lower side of the storage slot, and a rotating plate is provided in the control slot. The utility model has a reasonable structural design, and the ladder board can be smoothly placed on the ground by using a hydraulic cylinder. By providing a storage slot, the ladder board can be stored to avoid the phenomenon of large wind resistance of the semi-trailer during transportation. By providing a control mechanism, the storage slot is closed to prevent debris from entering the storage slot and causing damage to the parts in the storage slot.

[0004] However, the above-mentioned method still has certain shortcomings when used. The length of the ladder board is fixed and cannot be adjusted. The working length of the ladder board cannot be adjusted accordingly according to different slope requirements, which is not convenient for better adjusting the length of the ladder board. Utility Model Content

[0005] The utility model aims to provide a folding ladder for a low-bed semi-trailer, so as to solve the problem of inconvenience in preventing loss and carrying proposed in the above-mentioned background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a folding ladder for a low-bed semi-trailer, comprising a mounting assembly and a length adjustment assembly; the mounting assembly comprises a frame, a mounting groove is provided on one side of the frame, an electric hydraulic cylinder is provided on one side of the inner wall of the mounting groove, a U-shaped frame is provided at the output end of the electric hydraulic cylinder, a support shaft is rotatably inserted through one side of the U-shaped frame through a bearing, a main ladder plate is sleeved in the middle of the support shaft, a rectangular groove is provided on one side of the main ladder plate, and the angle of the main ladder plate is adjusted by an angle adjustment mechanism; the length adjustment assembly comprises an extended ladder plate, the extended ladder plate is slidably arranged inside the rectangular groove, a threaded hole is provided in the middle of one side of the extended ladder plate, and the position of the extended ladder plate is adjusted by an adjustment control mechanism.

[0007] As a preferred technical solution of the utility model, the angle adjustment mechanism includes a first forward and reverse motor, which is arranged on the other side of the inner wall of the U-shaped frame, and the output shaft of the first forward and reverse motor is connected to a first worm.

[0008] As a preferred technical solution of the utility model, one end of the support shaft is sleeved with a first worm gear, the first worm gear is meshingly connected with the first worm, and the U-shaped frame is slidably arranged inside the installation groove.

[0009] As a preferred technical solution of the utility model, the adjustment control mechanism includes a rectangular frame, and the rectangular frame is arranged on one side of the inner wall of the rectangular groove.

[0010] As a preferred technical solution of the utility model, a screw is rotatably inserted through a bearing on one side of the rectangular frame, and a second forward and reverse motor is provided on one side of the inner wall of the rectangular frame.

[0011] As a preferred technical solution of the utility model, the output shaft of the second forward and reverse motor is connected to a second worm, and one end of the screw is sleeved with a second worm wheel.

[0012] As a preferred technical solution of the utility model, the second worm wheel is meshedly connected with the second worm, and the other end of the screw is threadedly inserted into the interior of the threaded hole.

[0013] Compared with the related art, the folding ladder for low-bed semi-trailer provided by the utility model has the following beneficial effects:

[0014] The second worm is driven to rotate by controlling the output shaft of the second forward and reverse motor. The second worm drives the second worm wheel to rotate by meshing with the second worm wheel. The second worm wheel drives the screw to rotate. The screw drives the extended ladder plate to slide horizontally inside the rectangular groove by cooperating with the thread of the threaded hole, thereby adjusting the overall length of the ladder, thereby solving the technical problem of being inconvenient to better adjust the length of the ladder plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the utility model;

[0016] Figure 2 It is a schematic diagram of the cross-sectional structure of the utility model;

[0017] Figure 3 For this utility model Figure 2 A schematic diagram of the enlarged structure at point A;

[0018] Figure 4 For this utility model Figure 2 Schematic diagram of the enlarged structure at B.

[0019] In the figure: 1. Installation assembly; 101. Frame; 102. Installation slot; 103. Electric hydraulic cylinder; 104. U-shaped frame; 105. Support shaft; 106. Main ladder plate; 107. First forward and reverse motor; 108. First worm; 109. First worm gear; 1010. Rectangular slot; 2. Length adjustment assembly; 201. Extended ladder plate; 202. Threaded hole; 203. Rectangular frame; 204. Screw; 205. Second forward and reverse motor; 206. Second worm; 207. Second worm gear. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] Embodiment 1:

[0022] See also Figure 1-4 , the utility model provides a folding ladder for a low-bed semi-trailer, comprising a mounting assembly 1 and a length adjustment assembly 2;

[0023] The mounting assembly 1 includes a frame 101, a mounting groove 102 is provided on one side of the frame 101, an electric hydraulic cylinder 103 is provided on one side of the inner wall of the mounting groove 102, a U-shaped frame 104 is provided at the output end of the electric hydraulic cylinder 103, a support shaft 105 is rotatably inserted through a bearing on one side of the U-shaped frame 104, a main climbing plate 106 is sleeved on the middle part of the support shaft 105, a rectangular groove 1010 is provided on one side of the main climbing plate 106, and the main climbing plate 106 is adjusted in angle by an angle adjustment mechanism, so as to facilitate the adjustment of the angle;

[0024] The angle adjustment mechanism includes a first forward and reverse motor 107, which is arranged on the other side of the inner wall of the U-shaped frame 104. The output shaft of the first forward and reverse motor 107 is connected to a first worm 108 to drive the first worm wheel 109 to rotate.

[0025] One end of the support shaft 105 is sleeved with a first worm gear 109, which is meshed and connected with the first worm 108. The U-shaped frame 104 is slidably arranged inside the mounting groove 102 to facilitate sliding displacement adjustment.

[0026] Specifically, first, the output ends of the two electric hydraulic cylinders 103 are controlled to telescopically adjust to drive the main ladder plate 106 to move through the U-shaped frame 104 and the support shaft 105 until it is fully extended out of the mounting slot 102, and the output shaft of the first forward and reverse motor 107 is controlled to rotate to drive the first worm 108 to rotate. The first worm 108 rotates and engages with the first worm gear 109 to drive the support shaft 105 and the main ladder plate 106 to rotate to a suitable angle.

[0027] Embodiment 2:

[0028] The length adjustment component 2 includes an extended ladder plate 201, which is slidably arranged inside the rectangular groove 1010, and a threaded hole 202 is opened in the middle of one side of the extended ladder plate 201. The extended ladder plate 201 is adjusted in position by an adjustment control mechanism, so as to adjust the overall length of the ladder.

[0029] The regulating control mechanism includes a rectangular frame 203, which is arranged on one side of the inner wall of the rectangular slot 1010 to facilitate the installation of the second forward and reverse motor 205;

[0030] A screw 204 is rotatably inserted through a bearing on one side of the rectangular frame 203, and a second forward and reverse motor 205 is provided on one side of the inner wall of the rectangular frame 203 to drive the second worm 206 to rotate;

[0031] The output shaft of the second forward and reverse motor 205 is connected to the second worm 206, and one end of the screw 204 is sleeved with a second worm gear 207 to drive the screw 204 to rotate;

[0032] The second worm wheel 207 is meshed with the second worm 206, and the other end of the screw 204 is threadedly inserted into the threaded hole 202, so as to drive the extended ladder plate 201 to slide and adjust the displacement;

[0033] Specifically, first, the second worm 206 is driven to rotate by controlling the output shaft of the second forward and reverse motor 205. The second worm 206 rotates and engages with the second worm gear 207 to drive the second worm gear 207 to rotate. The second worm gear 207 rotates and drives the screw 204 to rotate. The screw 204 rotates and engages with the threaded hole 202 to drive the extended ladder plate 201 to slide horizontally inside the rectangular groove 1010, thereby adjusting the overall length of the ladder, thereby solving the technical problem that it is not convenient to better adjust the length of the ladder plate.

[0034] When in use, first fix the folding ladder of the low-bed semi-trailer in the corresponding working position, then check whether all parts of the folding ladder of the low-bed semi-trailer are working properly. After the inspection is completed, it can be used. When in use, control the output end telescopic adjustment of the two electric hydraulic cylinders 103 to drive the main ladder plate 106 to move through the U-shaped frame 104 and the support shaft 105 until it is fully extended out of the installation groove 102, control the output shaft of the first forward and reverse motor 107 to rotate and drive the first worm 108 to rotate, and the first worm 108 rotates and drives the support through meshing with the first worm gear 109 The shaft 105 and the main ladder plate 106 are rotated to a suitable angle, and the second worm 206 is driven to rotate by controlling the output shaft of the second forward and reverse motor 205 to rotate. The second worm 206 rotates and engages with the second worm gear 207 to drive the second worm gear 207 to rotate. The second worm gear 207 rotates and drives the screw 204 to rotate. The screw 204 rotates and engages with the threaded hole 202 to drive the extended ladder plate 201 to slide horizontally inside the rectangular groove 1010, thereby adjusting the overall length of the ladder, thereby solving the technical problem that it is not convenient to better adjust the length of the ladder plate.

[0035] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A folding ladder for a low-bed semi-trailer, characterized in that: include A mounting assembly (1), the mounting assembly (1) comprising a vehicle frame (101), a mounting groove (102) being provided on one side of the vehicle frame (101), an electric hydraulic cylinder (103) being provided on one side of the inner wall of the mounting groove (102), a U-shaped frame (104) being provided at the output end of the electric hydraulic cylinder (103), a support shaft (105) being rotatably inserted through a bearing on one side of the U-shaped frame (104), a main climbing plate (106) being sleeved in the middle of the support shaft (105), a rectangular groove (1010) being provided on one side of the main climbing plate (106), and the angle of the main climbing plate (106) being adjusted by an angle adjustment mechanism; A length adjustment component (2), the length adjustment component (2) comprising an extended ladder plate (201), the extended ladder plate (201) being slidably arranged inside a rectangular groove (1010), a threaded hole (202) being provided in the middle of one side of the extended ladder plate (201), and the position of the extended ladder plate (201) being adjusted by an adjustment control mechanism.

2. The folding ladder for a low-bed semi-trailer according to claim 1, characterized in that: The angle adjustment mechanism comprises a first forward and reverse motor (107), the first forward and reverse motor (107) being arranged on the other side of the inner wall of the U-shaped frame (104), and the output shaft of the first forward and reverse motor (107) being connected to a first worm (108).

3. The folding ladder for a low-bed semi-trailer according to claim 2, characterized in that: One end of the support shaft (105) is sleeved with a first worm gear (109), the first worm gear (109) is meshingly connected with the first worm (108), and the U-shaped frame (104) is slidably arranged inside the mounting groove (102).

4. The folding ladder for a low-bed semi-trailer according to claim 1, characterized in that: The adjustment control mechanism comprises a rectangular frame (203), and the rectangular frame (203) is arranged on one side of the inner wall of the rectangular groove (1010).

5. The folding ladder for a low-bed semi-trailer according to claim 4, characterized in that: A screw rod (204) is rotatably inserted through a bearing on one side of the rectangular frame (203), and a second forward and reverse motor (205) is provided on one side of the inner wall of the rectangular frame (203).

6. The folding ladder for a low-bed semi-trailer according to claim 5, characterized in that: The output shaft of the second forward and reverse motor (205) is connected to a second worm (206), and one end of the screw (204) is sleeved with a second worm wheel (207).

7. The folding ladder for a low-bed semi-trailer according to claim 6, characterized in that: The second worm wheel (207) is meshedly connected with the second worm (206), and the other end of the screw (204) is threadedly inserted into the interior of the threaded hole (202).

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