A special-shaped slide rail, a semitrailer carriage and a semitrailer

Abstract

The utility model discloses a special-shaped slide rail, a semitrailer carriage and a semitrailer, and relates to the technical field of transportation equipment, which comprises a main body, the two ends of the main body are respectively used for being connected with front upright columns and rear upright columns on one side of the semitrailer, a first sliding groove on one side of the main body is used for mounting first running wheels on a curtain cloth structure, the main body is arc-shaped and arches upward in the middle, when the supporting column is transversely slid to one side of the container, the main body is gradually tended to be horizontal in the process of downward deformation due to the preset arching amount upward, the main body is prevented from extending into the area for loading goods due to downward deformation, the problem that the loading space is compressed is avoided, meanwhile, the cross section height of the main body is greater than 1 / 4 of the interval between the two adjacent first running wheels 3, the certification of the TIR side curtain semitrailer can be satisfied, and the requirements of the TIR convention are satisfied.

Description

Technical Field

[0001] This utility model relates to the field of transportation equipment technology, and in particular to a special-shaped slide rail, a semi-trailer carriage, and a semi-trailer. Background Technology

[0002] In modern logistics and transportation, semi-trailers are a major means of road transport, and the stability of their cargo box structure directly affects transportation efficiency and safety. Currently, in common semi-trailer cargo box structures, the top crossbeams are typically supported vertically by movable support columns to meet different loading and unloading needs.

[0003] When loading and unloading goods, the support column needs to slide laterally to one side of the cargo box for easy operation, resulting in an unsupported section in the middle of the crossbeam. Under the weight of the vehicle frame, the crossbeam will deform downward. When the semi-trailer is fully loaded with goods, the elastic deflection of the crossbeam will be more obvious, resulting in the space used for loading goods being compressed.

[0004] Furthermore, under the framework of the TIR International Road Transport Convention, existing guide rails have significant technical defects: 1) Steel welded guide rails are heavy, which does not conform to the trend of lightweight development of modern logistics equipment. They have low functional integration and require the separate installation of multiple components such as water deflectors and pulleys, increasing assembly complexity. Moreover, they cannot meet the mandatory requirement in the TIR Convention that "the width of the curtain coverage must be ≥ 1 / 4 of the distance between the side curtain pulleys"; 2) Chinese enterprises generally face low cross-border customs clearance efficiency due to substandard equipment when carrying out multimodal transport on China-Europe freight trains. Utility Model Content

[0005] The purpose of this utility model is to provide a special-shaped slide rail, which is designed with the main body in an arc shape that arches upwards from the middle, to adapt to the deformation of the semi-trailer frame when it is not supported by a column, thus avoiding the problem of the loading space being compressed.

[0006] To achieve the above objectives, this utility model provides the following solution:

[0007] This utility model provides an irregularly shaped slide rail, comprising:

[0008] The main body, with its two ends respectively used to connect to the front and rear pillars on one side of the semi-trailer;

[0009] A first sliding groove is provided on one side of the main body. The first sliding groove is used to install a first running wheel on the curtain structure. The first running wheel is slidably connected to the first sliding groove.

[0010] The main body is an arc shape that arches upwards from the middle to accommodate the top deformation of the semi-trailer when it is not supported by pillars.

[0011] As one embodiment, the main body is further provided with a second sliding groove, which is parallel to the first sliding groove and spaced apart from the first sliding groove. The second sliding groove is used to install a first guide wheel on the curtain structure, and the first guide wheel slides in cooperation with the second sliding groove.

[0012] As one embodiment, the main body is also provided with an installation groove, which is located above the first sliding groove. The installation groove is used to install a water-blocking strip, which is used to prevent water from entering the carriage.

[0013] As one embodiment, the opening of the mounting groove is provided with an anti-detachment protrusion, which extends from one side of the opening to the other side of the opening.

[0014] As one embodiment, the main body is further provided with a third sliding groove, which is used to install a sliding support column. The sliding support column is slidably connected to the third sliding groove and is used to support the main body.

[0015] As one embodiment, the upper part of the main body is also provided with a fifth sliding groove, which is used to install the second running wheel on the sliding support rod, and the sliding support rod is used to support the canopy cloth.

[0016] As one embodiment, the main body end is also provided with a fourth sliding groove, which is used to install the second guide wheel on the sliding strut. The opening of the fourth sliding groove is set upward, and the support surface of the fourth sliding groove near the semi-trailer is used to support the second guide wheel to improve the stability of the sliding strut during operation.

[0017] As one embodiment, the height difference between the middle part and both ends of the main body is 50-200mm in the vertical direction.

[0018] This utility model also provides a semi-trailer carriage using the above-mentioned irregular sliding rail, including a curtain structure, which is installed on the irregular sliding rail.

[0019] This utility model also provides a semi-trailer that uses the above-mentioned semi-trailer box.

[0020] The present invention achieves the following technical advantages over the prior art:

[0021] In the irregular sliding rail disclosed in this utility model, the two ends of the main body are respectively used to connect to the front column and the rear column on one side of the semi-trailer, and the main body is an arc shape with the middle part arching upward. When the support column is slid laterally to the side of the cargo box, the main body deforms downward. Since the main body is preset with an upward arch, the main body will gradually tend to be horizontal during the downward deformation process, avoiding the main body from extending into the area used for loading goods due to downward deformation, that is, avoiding the problem of the loading space being compressed. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the irregular-shaped slide rail in an embodiment of the present utility model;

[0024] Figure 2 for Figure 1 A diagram from another perspective;

[0025] Figure 3 This is a schematic diagram illustrating the cooperation between the body and the curtain structure in an embodiment of this utility model;

[0026] The components are as follows: 1. Main body; 2. First slide groove; 3. First running wheel; 4. Second slide groove; 5. First guide wheel; 6. Mounting groove; 7. Water-blocking strip; 8. Anti-falling protrusion; 9. Third slide groove; 10. Sliding support column; 11. Fourth slide groove; 12. Sliding strut; 13. Second guide wheel; 14. Fifth slide groove; 15. Second running wheel; 16. Curtain body; 17. Sliding wheel; 18. Sliding strut seat. Detailed Implementation

[0027] 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.

[0028] The purpose of this utility model is to provide a non-standard sliding rail to solve the problems existing in the prior art, so that the non-standard sliding rail can adapt to the deformation of the semi-trailer frame in the state without column support, and avoid the compression of the vehicle loading space.

[0029] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0030] Please refer to Figures 1-3The irregular-shaped slide rail disclosed in this embodiment of the present invention includes: a main body 1, the two ends of which are respectively used to connect to the front column and the rear column on one side of the semi-trailer; a first slide groove 2 is provided on one side of the main body 1, the first slide groove 2 is used to install the first running wheel 3 on the curtain structure, the first running wheel 3 is slidably connected to the first slide groove 2; the main body 1 is an arc shape with the middle part arching upwards, it can be understood that, in the non-loading and unloading state, the upper end of the support column can abut against the middle part of the main body 1, and the support column can provide upward support force to the middle part of the main body 1; its working principle is: the main body 1 is installed with... Installed on top of the front and rear pillars, when the semi-trailer is unloaded, the middle of the main body 1 arches upward. When loading and unloading goods, the support pillars move to one side of the cargo box. At this time, the middle of the main body 1 loses the support of the support pillars, and the main body 1 will deform downward. However, since the main body 1 is pre-set with an upward arch, the main body 1 will gradually become horizontal. This avoids the main body 1 from extending into the space used for loading goods due to downward deformation after losing the middle support, thereby avoiding the problem of the semi-trailer's loading space being compressed. This allows for the loading and unloading of oversized goods or the loading of more goods through stacking.

[0031] In this embodiment, the first chute 2 is set horizontally. That is, when the main body 1 is installed on the semi-trailer and the support column is supported in the middle of the main body 1, the main body 1 is in an arc shape with the middle arched upward, and the first running wheel 3 can slide smoothly.

[0032] In this embodiment, when the main body 1 is installed on the front and rear pillars, the first slide 2 is located on the side away from the center of the semi-trailer compartment, so as to facilitate the quick opening or closing of the curtain structure.

[0033] It is understandable that semi-trailers have pallets for carrying cargo, and uprights that are perpendicular to the pallets and extend upwards at the four corners of the pallets.

[0034] In this embodiment, the main body 1 is also provided with a second sliding groove 4, which is parallel to the first sliding groove 2 and is spaced apart from the first sliding groove 2. The second sliding groove 4 is used to install the first guide wheel 5 on the curtain structure. The first guide wheel 5 slides in cooperation with the second sliding groove 4. Through the cooperation of the first guide wheel 5 and the first running wheel 3, the stability of the curtain structure when sliding can be effectively improved.

[0035] In this embodiment, the opening of the first slide groove 2 is set in a direction away from the center of the semi-trailer. The support surface at the bottom of the first slide groove 2 is used to abut against the first running wheel 3. That is to say, the rotation axis of the first running wheel 3 is set horizontally. The first running wheel 3 can provide support for the curtain structure so as to slide the curtain structure on the main body 1.

[0036] In this embodiment, the first guide wheel 5 is connected to the curtain body 16 of the curtain structure via an L-shaped plate. The vertical side of the L-shaped plate is used to connect to the curtain body 16 of the curtain structure, and the horizontal side of the L-shaped plate is used to install the first guide wheel 5. The rotation axis of the first guide wheel 5 is perpendicular to the horizontal side of the L-shaped plate, that is, the rotation axis of the first guide wheel 5 is vertically set. Furthermore, the rotation axis of the first guide wheel 5 is spaced apart from the support surface at the bottom of the second slide groove 4. In this state, the first guide wheel 5 only plays a guiding role, so that the first guide wheel 5 can move under a smaller driving force.

[0037] In this embodiment, the second slide 4 is disposed on the upper side of the first slide 2.

[0038] In this embodiment, the main body 1 is also provided with an installation groove 6, which is located above the first slide groove 2. The installation groove 6 is used to install a water-blocking strip 7, which can prevent external water from entering the carriage or the first slide groove 2.

[0039] In this embodiment, the depth of the mounting groove 6 is 5-10mm; preferably, the depth of the mounting groove 6 is 6mm.

[0040] In this embodiment, one end of the water-blocking strip 7 is installed in the mounting groove 6, and the other end of the water-blocking strip 7 extends downward to the lower side of the first sliding groove 2, thereby covering the side of the water-blocking strip 7 near the semi-trailer to prevent external water from entering the first sliding groove 2.

[0041] In this embodiment, an anti-detachment protrusion 8 is provided at the opening of the mounting groove 6. The anti-detachment protrusion 8 extends from one side of the opening to the other side. Furthermore, the water-blocking strip 7 is a flexible structure. The water-blocking strip 7, the anti-detachment protrusion 8, and the opening are fitted with a gap, which not only facilitates installation but also ensures the stability of the water-blocking strip 7 during use.

[0042] It is understandable that the extension direction of the mounting groove 6 is the same as the extension direction of the first slide groove 2 and the second slide groove 4, and the opening direction of the mounting groove 6 is towards the side away from the semi-trailer.

[0043] In this embodiment, anti-fall-off protrusions 8 are provided on both the upper and lower sides of the opening of the mounting groove 6 to further improve the stability of the water-blocking strip 7 during installation.

[0044] In this embodiment, guide slopes are provided on the side of the two anti-detachment protrusions 8 away from the semi-trailer, so that the gap between the two anti-detachment protrusions 8 is funnel-shaped, with the larger end of the funnel-shaped gap facing the side away from the semi-trailer, so that the water-blocking strip 7 can be more easily installed into the mounting groove 6.

[0045] In this embodiment, the water-blocking strip 7 is provided with a snap-fit ​​part. The size of the snap-fit ​​part is not greater than the size of the mounting groove 6, and the size of the snap-fit ​​part is greater than the gap between the two anti-detachment protrusions 8. The snap-fit ​​part can further improve the stability of the water-blocking strip 7.

[0046] In this embodiment, the main body 1 is also provided with a third slide groove 9. The third slide groove 9 is used to install the sliding support column 10. The sliding support column 10 is slidably connected to the third slide groove 9. The sliding support column 10 serves as a support column to support the main body 1. By installing the sliding support column 10 through the third slide groove 9, when the sliding support column 10 moves from both ends of the main body 1 to the middle of the main body 1, it can lift the middle of the main body 1 upwards. There is no need for the staff to lift the main body 1 upwards to support the sliding support column 10 under the main body 1.

[0047] In this embodiment, a sliding wheel 17 is provided on the upper part of the sliding support 10, and the sliding wheel 17 is slidably installed in the third sliding groove 9.

[0048] In this embodiment, the upper part of the main body 1 is also provided with a fifth sliding groove 14. The fifth sliding groove 14 is used to install the second running wheel 15 on the sliding support rod 12. The sliding support rod 12 is used to support the canopy cloth. Furthermore, one end of the sliding support rod 12 is connected to the canopy cloth. The second running wheel 15 is spaced apart from the canopy cloth, and the second running wheel 15 is located on the side closer to the fifth sliding groove 14 than the canopy cloth. The canopy cloth and the sliding support rod are fixed by binding straps.

[0049] In this embodiment, the fifth slide groove 14 is located on the side of the main body 1 away from the lateral center of the semi-trailer. The opening of the fifth slide groove 14 is oriented away from the semi-trailer. The end of the sliding support rod 12 away from the canopy is provided with a downwardly bent sliding support rod seat 18. The second running wheel 15 is installed on the sliding support rod seat 18. The rotation axis of the second running wheel 15 is perpendicular to the sliding support rod seat 18, that is, the rotation axis of the second running wheel 15 is horizontally set. The support surface on the lower side of the fifth slide groove 14 or the support surface on the upper side of the fifth slide groove 14 is used to support the second running wheel 15.

[0050] In this embodiment, the first slide groove 2 and the second slide groove 4 are both located below the fifth slide groove 14 to ensure that the second running wheel 15 can be smoothly installed into the fifth slide groove 14.

[0051] In this embodiment, a fourth slide groove 11 is also provided at the upper end of the main body 1. The fourth slide groove 11 is used to install the second guide wheel 13 on the sliding support rod 12. The opening of the fourth slide groove 11 is set upward. The support surface of the fourth slide groove 11 near the semi-trailer is used to support the second guide wheel 13. Furthermore, one end of the sliding support rod 12 is connected to the canopy cloth, and the second guide wheel 13 is spaced apart from the canopy cloth.

[0052] In this embodiment, the rotation shaft of the second guide wheel 13 is vertically arranged. One end of the rotation shaft of the second guide wheel 13 is connected to the sliding support rod 12, and the other end extends downward so that the second guide wheel 13 can enter the fourth slide groove 11.

[0053] In this embodiment, the left and right sides of the semi-trailer are equipped with irregular sliding rails, and the left and right sides of the canopy can be slidably connected to the fifth sliding groove 14 on the main body 1 of the irregular sliding rails on both sides through the two support seats 18 on the left and right sides of the sliding strut 12.

[0054] In this embodiment, the height difference between the middle and both ends of the main body 1 in the vertical direction is 50-200mm, that is, the upward arching height of the middle of the main body 1 is 50-200mm. Designers can select different shaped slide rails with different arching heights according to actual needs to adapt to semi-trailers of different lengths.

[0055] In this embodiment, the irregular slide rail can be divided into multiple sections. When multiple irregular slide rail sections are connected in sequence and installed on the front and rear pillars on one side of the semi-trailer, the whole structure formed by connecting multiple irregular slide rail sections is an arc shape with the middle arched upwards. The height difference between the middle and both ends in the vertical direction is 50-200mm.

[0056] The semi-trailer carriage disclosed in this embodiment of the present invention uses the irregular-shaped slide rail disclosed above, including a curtain structure, which is installed on the irregular-shaped slide rail.

[0057] In this embodiment, the curtain structure includes a curtain body 16, a first running wheel 3, and a first guide wheel 5. The first running wheel 3 and the first guide wheel 5 are installed on the same side of the curtain body 16 and are arranged vertically at intervals. The curtain body 16 is connected to the irregular slide rail through the first running wheel 3 and the first guide wheel 5. The first running wheel 3 is slidably connected to the first slide groove 2, and the first guide wheel 5 is slidably connected to the second slide groove 4.

[0058] In this embodiment, the semi-trailer cargo box also includes a canopy. In this embodiment, there are two irregular sliding rails, which are respectively set on the left and right sides of the semi-trailer. The irregular sliding rail on the left side is installed on the front and rear pillars on the left side of the semi-trailer, and the irregular sliding rail on the right side is installed on the front and rear pillars on the right side of the semi-trailer. The canopy is slidably connected to the irregular sliding rails on the left and right sides through the sliding support rod 12 to realize the rapid opening and closing of the canopy.

[0059] In this embodiment, the semi-trailer compartment also includes a pull rod, which is connected to a hook in the middle of the sliding support rod 12. Through the pull rod, the staff can quickly open the tarpaulin.

[0060] In this embodiment, the semi-trailer compartment also includes a water-blocking strip 7, which is installed in the mounting groove 6 of the irregular-shaped slide rail to prevent water from entering the first and second slide rails.

[0061] In this embodiment, the semi-trailer carriage also includes a sliding support column 10, the upper end of which is slidably connected to the third slide groove 9 of the irregular slide rail.

[0062] The semi-trailer disclosed in this embodiment of the present invention uses the semi-trailer cargo box disclosed above.

[0063] In this embodiment, the first chute 2 is opened on the side of the main body 1 away from the semi-trailer. The opening of the first chute 2 is opened in the direction away from the semi-trailer. The first chute 2 is opened horizontally along the length of the semi-trailer. The opening of the first chute 2 is provided with an anti-detachment protrusion to prevent the first running wheel 3 from falling off. The anti-detachment protrusion is provided on the upper and lower sides of the opening of the first chute 2. The upper anti-detachment protrusion extends downward and the lower anti-detachment protrusion extends upward, which can prevent the first running wheel 3 from falling off the first chute 2 in the direction away from the semi-trailer.

[0064] In this embodiment, the second slide 4 is opened on the side of the main body 1 away from the semi-trailer. The second slide 4 is parallel to the first slide 2. The second slide 4 can be set on the upper or lower side of the first slide 2 according to actual needs. The opening of the second slide 4 is also provided with an anti-detachment protrusion, and its setting form is the same as that of the anti-detachment protrusion in the first slide 2, which will not be described again here.

[0065] In this embodiment, the third slide groove 9 is located at the bottom end of the irregular slide rail. The opening of the third slide groove 9 is downward, and an anti-detachment protrusion is also provided at the opening of the third slide groove 9 to prevent the sliding wheel 17 from detaching downward from the third slide groove 9. The anti-detachment protrusion at the opening of the third slide groove 9 is configured in the same way as the anti-detachment protrusion in the first slide groove 2, and will not be described again here.

[0066] In this embodiment, the body of the irregular-shaped slide rail has a hollow structure.

[0067] In this embodiment, the irregular-shaped slide rail is integrally formed by hot extrusion of aerospace-grade aluminum alloy 6005A-T6.

[0068] In this embodiment, the irregularly shaped slide rail is subjected to T6 heat treatment after extrusion molding, so that the yield strength of the material reaches ≥260MPa.

[0069] In this embodiment, the surface of the irregularly shaped slide rail can be anodized to form a wear-resistant layer, or it can be left untreated.

[0070] In this embodiment, the irregular-shaped slide rail is topology optimized to form a five-cell, four-rib reinforced structure, achieving a bending modulus ≥85cm. 3 While maintaining a linear density of 7.5 kg / m, it has a smaller self-weight and higher bending strength compared to traditional steel structures, achieving a 42% weight reduction and a 15% increase in bending strength.

[0071] In this embodiment, multiple first running wheels 3, first guide wheels 5, second guide wheels 13, and second running wheels 15 are provided at intervals along the extension direction of the body to improve the stability of the curtain body 16 during the sliding process.

[0072] In this embodiment, the cross-sectional height of the main body is greater than 1 / 4 of the distance between two adjacent first running wheels 3, in order to meet the mandatory specifications of the TIR Convention for the width of the curtain coverage, that is, to meet the certification of TIR side curtain semi-trailers. After the vehicle is sealed and endorsed with a TIR certificate by customs at the place of departure, when it transits through a contracting state, customs only needs to verify the TIR certificate information and check the vehicle's customs seal. It can be released without opening the container for inspection, which improves the efficiency of cross-border customs clearance and shortens the cross-border customs clearance time by more than 35%. This solves the problem of low cross-border customs clearance efficiency caused by substandard equipment when Chinese enterprises carry out China-Europe freight train multimodal transport.

[0073] In this embodiment, the distance between two adjacent first running wheels 3 is no greater than 600mm.

[0074] In this embodiment, the cross-sectional height of the main body is greater than 175mm.

[0075] In this embodiment, the length from the position of the first running wheel 3 to the lower end of the body is 150mm to 160mm, that is, the length of the curtain body 16 and the body combined in the vertical direction is 150mm to 160mm, preferably 155mm.

[0076] In this embodiment, the distance from the top of the main body 1 to the bottom of the main body 1 in the vertical direction is 220mm.

[0077] In this embodiment, the wall thickness of the chamber in the main body 1 is 2-5 mm.

[0078] In this embodiment, the second slide 4, the third slide 9, the fourth slide 11 and the fifth slide 14 can all be arranged horizontally, just like the first slide 2, or they can be arranged in a way that is consistent with the curvature of the main body 1 and arched upward in the middle.

[0079] Furthermore, in this utility model, the irregular-shaped slide rail is integrally molded, and the main body 1 is provided with several hollow cavities, which solves the problem of excessive weight of steel welded guide rails in the prior art. In addition, the water-blocking strip 7, the first running wheel 3, the first guide wheel 5, the second guide wheel 13 and the second running wheel 15 are all integrated and installed on the main body 1, which effectively reduces the assembly difficulty.

[0080] This utility model uses specific examples to illustrate its principles and implementation methods. The above description of the embodiments is only for the purpose of helping to understand the method and core idea of ​​this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the idea of ​​this utility model. In summary, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A non-standard slide rail, characterized in that, include: The main body (1) has two ends that are respectively used to connect to the front column and the rear column on one side of the semi-trailer; The main body (1) has a first sliding groove (2) on one side. The first sliding groove (2) is used to install the first running wheel (3) on the curtain structure. The first running wheel (3) is slidably connected to the first sliding groove (2). The main body (1) is an arc shape with the middle part arching upwards to accommodate the top deformation of the semi-trailer when it is not supported by a pillar.

2. The irregular-shaped slide rail according to claim 1, characterized in that, The main body (1) is also provided with a second slide groove (4), which is parallel to the first slide groove (2) and is spaced apart from the first slide groove (2). The second slide groove (4) is used to install the first guide wheel (5) on the curtain structure, and the first guide wheel (5) slides in cooperation with the second slide groove (4).

3. The irregular-shaped slide rail according to claim 1, characterized in that, The main body (1) is also provided with an installation groove (6), which is located above the first sliding groove (2). The installation groove (6) is used to install a water-blocking strip (7), which is used to prevent water from entering the carriage.

4. The irregular-shaped slide rail according to claim 3, characterized in that, The opening of the mounting groove (6) is provided with an anti-drop protrusion (8), which extends from one side of the opening to the other side of the opening.

5. The irregular-shaped slide rail according to claim 1, characterized in that, The main body (1) is also provided with a third slide groove (9), which is used to install a sliding support column (10). The sliding support column (10) is slidably connected to the third slide groove (9) and is used to support the main body (1).

6. The irregular-shaped slide rail according to claim 1, characterized in that, The upper part of the main body (1) is also provided with a fifth sliding groove (14), which is used to install the second running wheel (15) on the sliding support rod (12), and the sliding support rod (12) is used to support the canopy cloth.

7. The irregular-shaped slide rail according to claim 6, characterized in that, The upper end of the main body (1) is also provided with a fourth slide groove (11). The fourth slide groove (11) is used to install the second guide wheel (13) on the sliding support rod (12). The opening of the fourth slide groove (11) is set upward. The support surface of the fourth slide groove (11) near the semi-trailer is used to support the second guide wheel (13) to improve the stability of the sliding support rod (12) during operation.

8. The irregular-shaped slide rail according to claim 1, characterized in that, In the vertical direction, the height difference between the middle part and both ends of the main body (1) is 50-200mm.

9. A semi-trailer carriage, characterized in that, The irregular-shaped slide rail according to any one of claims 1-8 includes a curtain structure, wherein the curtain structure is installed on the irregular-shaped slide rail.

10. A semi-trailer, characterized in that, The semi-trailer carriage described in claim 9 is applicable.

Images