Drawing type semitrailer rear cross beam

Abstract

The utility model discloses a draw-pull type semitrailer rear cross beam which comprises a rear cross beam body, a draw-pull rod and a stand column, the draw-pull rod and the stand column are installed in the rear cross beam body in a sliding mode, a positioning plate is fixedly installed at the bottom of the draw-pull rod through the stand column, a limiting piece is movably installed on the side wall of the positioning plate, a plurality of positioning pins are arranged on the side wall of the rear cross beam body, and a hook part is arranged at one end of the limiting piece. And the limiting piece can be hooked on the positioning pin through the hook part so as to limit the sliding distance of the drawing rod. The sliding positions of the stand columns in the rear cross beam are limited through the limiting pieces and the positioning pins, compared with a bolt positioning mode, operation is more convenient, tedious bolt tightening and disassembling processes are not needed, positioning can be rapidly achieved, the idler wheels penetrate through the bottom of the rear cross beam to support the drawing rod, drawing resistance is reduced, and the service life of the drawing rod is prolonged. Operators can push or pull the drawing rod more easily, and convenience is brought to the operation of drawing the cross beam.

Description

Technical Field

[0001] This utility model relates to the field of semi-trailer accessories, specifically a pull-out rear crossbeam for a semi-trailer. Background Technology

[0002] In today's logistics and transportation industry, pull-out semi-trailers are widely used because their body length can be flexibly adjusted to adapt to the loading needs of goods of different sizes. The rear crossbeam, as one of the key components of a pull-out semi-trailer, plays a crucial role in the overall performance and ease of operation of the vehicle.

[0003] Traditional pull-out semi-trailers typically use bolts to position the uprights when adjusting the rear crossbeam. When the uprights need to be repositioned within the crossbeam to accommodate different loading conditions, operators must use tools, making the process time-consuming and labor-intensive. Furthermore, the current pull-out mechanism lacks an effective support structure, resulting in significant resistance during the pulling process. This leads to accelerated wear on the pull-out components, shortening the crossbeam's lifespan and increasing vehicle maintenance costs. Utility Model Content

[0004] The purpose of this utility model is to provide a pull-out rear crossbeam for semi-trailers to solve the problems of the conventional rear crossbeams for semi-trailers mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a pull-out semi-trailer rear crossbeam, comprising a rear crossbeam and a pull-out rod and a column slidably installed in the rear crossbeam. A positioning plate is fixedly installed at the bottom of the pull-out rod via the column. A limiting piece is movably installed on the side wall of the positioning plate. A plurality of positioning pins are provided on the side wall of the rear crossbeam. A hook portion is provided at one end of the limiting piece. The limiting piece can be hooked onto the positioning pins through the hook portion, thereby limiting the sliding distance of the pull-out rod.

[0006] Preferably, the upright is fixedly installed at the bottom of the pull rod, and the bottom of the rear crossbeam is provided with a positioning hole for accommodating the upright.

[0007] Preferably, a pair of mounting seats are fixedly installed at the bottom of the rear crossbeam, and a pair of rollers are rotatably mounted in the mounting seats via a rotating shaft. The bottom of the rear crossbeam is provided with several through holes for accommodating the rollers.

[0008] Preferably, the column is welded to one end of the pull rod and is arranged perpendicular to the pull rod.

[0009] Preferably, the two ends of the positioning plate extend vertically to form upright ears, and the spacing between a pair of upright ears is adapted to the rear crossbeam.

[0010] Preferably, bolts are fixedly installed on the outer wall of the upright lug of the positioning plate, and the side wall of the limiting piece is provided with sliding holes for accommodating the bolts.

[0011] Preferably, the end of the limiting piece away from the hook portion is provided with a lever.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] This utility model limits the sliding position of the column in the rear crossbeam by setting a limiting piece and a positioning pin. Compared with the bolt positioning method, it is more convenient to operate. It can quickly achieve positioning without the need for cumbersome bolt tightening and disassembly process. In addition, the roller runs through the bottom of the rear crossbeam to support the pull rod, reducing the pulling resistance and making it easier for the operator to push or pull the pull rod, bringing convenience to the operation of pulling the crossbeam. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the first state of this utility model;

[0015] Figure 2 This is a schematic diagram of the second state three-dimensional structure of the present invention;

[0016] Figure 3 This is a schematic diagram of the bottom structure of the column of this utility model;

[0017] Figure 4 This is a three-dimensional cross-sectional view of the column of this utility model;

[0018] Figure 5 This is a schematic diagram of the overall side view of the present invention.

[0019] Figure 6 This is a three-dimensional structural diagram of the assembly of the pull rod and the positioning plate of this utility model.

[0020] In the diagram: 1. Rear crossbeam; 2. Column; 3. Mounting base; 4. Positioning pin; 5. Limiting plate; 6. Pull rod; 7. Roller; 8. Positioning hole; 9. Positioning plate; 10. Upright; 11. Hook. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Please see Figures 1-6This utility model provides a technical solution: a pull-out semi-trailer rear crossbeam, including a rear crossbeam 1 and a pull rod 6 and a column 2 slidably installed in the rear crossbeam 1. The column 2 is welded to one end of the pull rod 6 and is arranged perpendicularly to the pull rod 6. A pair of mounting seats 3 are fixedly installed at the bottom of the rear crossbeam 1. A pair of rollers 7 are rotatably installed in the mounting seats 3 via a rotating shaft. The bottom of the rear crossbeam 1 is provided with several through holes for accommodating the rollers 7. The advantage of this arrangement is that the pull rod 6 is slidably installed above the rollers 7, and the rollers 7 can convert sliding friction into rolling friction. The coefficient of kinetic friction, specifically rolling friction, is much smaller than that of sliding friction, making the pulling process smoother and reducing resistance. A positioning plate 9 is fixedly installed at the bottom of the pull rod 6 via a vertical rod 10. Both ends of the positioning plate 9 extend vertically to form lugs, the spacing of which matches the rear crossbeam 1. The vertical rod 10 is fixedly installed at the bottom of the pull rod 6. The bottom of the rear crossbeam 1 has positioning holes 8 for accommodating the vertical rod 10, thus limiting the sliding distance of the column 2. A limiting piece 5 is movably installed on the side wall of the positioning plate 9, with the limiting piece 5 located away from the hook portion 11. The end is equipped with a lever, which allows the user to easily drive the limiting plate 5 to rotate. Bolts are fixedly installed on the outer wall of the vertical lug of the positioning plate 9. The side wall of the limiting plate 5 has sliding holes for accommodating the bolts. Several positioning pins 4 are provided on the side wall of the rear crossbeam 1. One end of the limiting plate 5 has a hook part 11, which can hook the limiting plate 5 onto the positioning pins 4, thereby limiting the sliding distance of the pull rod 6. When the column 2 needs to be pulled out, the limiting plate 5 is pushed upwards and the hook part 11 is rotated to disengage from the positioning pins 4, and then the column 2 is pulled out. The column 10 slides... When the column reaches the end of the positioning hole 8, rotate the limiting piece 5 until the hook part 11 engages with another positioning pin 4 to complete the limiting of the column 2. This application limits the sliding position of the column 2 in the rear crossbeam 1 by setting the limiting piece 5 and the positioning pin 4. Compared with the bolt positioning method, the operation is more convenient. There is no need for the cumbersome bolt tightening and disassembly process, and positioning can be quickly achieved. In addition, the roller 7 passes through the bottom of the rear crossbeam 1 to support the pull rod 6, which reduces the pulling resistance and makes it easier for the operator to push or pull the pull rod 6, bringing convenience to the operation of pulling the crossbeam.

[0023] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0024] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A pull-type semitrailer rear cross member, characterized by: The utility model provides a rear crossbeam (1) and slide in rear crossbeam (1) among pull rod (6) and stand (2), the bottom of pull rod (6) is fixedly installed with the locating plate (9) through the vertical rod (10), the side wall of locating plate (9) is movably installed with the limiting sheet (5), the side wall of rear crossbeam (1) is equipped with a plurality of locating pin (4), one end of limiting sheet (5) is equipped with the hook portion (11), limiting sheet (5) can be hooked on locating pin (4) through hook portion (11), to limit the sliding distance of pull rod (6).

2. A pull type semitrailer rear crossbeam according to claim 1, characterized in that: The vertical rod (10) is fixedly installed on the bottom of the pull rod (6), and the bottom of the rear crossbeam (1) is provided with a positioning hole (8) for accommodating the vertical rod (10).

3. A pull type semitrailer rear crossbeam according to claim 1, characterized in that: The bottom of the rear crossbeam (1) is fixedly installed with a pair of mounting seats (3), a pair of rollers (7) are rotatably installed in the mounting seats (3) through rotating shafts, and the bottom of the rear crossbeam (1) is provided with a plurality of through holes for accommodating the rollers (7).

4. A pull type semitrailer rear crossbeam according to claim 1, characterized in that: The stand (2) is welded to one end of the pull rod (6) and is arranged perpendicularly to the pull rod (6).

5. A pull type semitrailer rear crossbeam according to claim 1, characterized in that: The two ends of the locating plate (9) extend in the vertical direction to form vertical ears, and the spacing of the pair of vertical ears is adapted to the rear crossbeam (1).

6. A pull type semitrailer rear crossbeam according to claim 1, characterized in that: The outer wall of the vertical ear of the locating plate (9) is fixedly installed with a bolt, and the side wall of the limiting sheet (5) is provided with a sliding hole for accommodating the bolt.

7. A pull type semitrailer rear cross member according to claim 1, characterized in that: The end of the limiting sheet (5) away from the hook portion (11) is provided with a push rod.

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