A kind of assembled semi-trailer rear protective net structure and assembly method

Abstract

The present invention provides an assembled semi-trailer rear protection net structure and an assembly method, which comprises a rear protection cross brace, at least two rear protection vertical braces and a web connecting plate, the bottom end of each rear protection vertical brace is welded to the upper surface of the rear protection cross brace, the rear protection vertical brace is a U-shaped groove structure, one side of the web connecting plate is fixed to the bottom of the U-shaped groove of the rear protection vertical brace, and the web connecting plate is provided with a plurality of web connecting holes. The assembled semi-trailer rear protection net structure has the advantages of modular manufacturing, efficient and simple replacement, high assembly efficiency, good adaptability, and can be disassembled for transportation, and the assembly method has the advantages of strong adaptability and high installation accuracy.

Description

Technical Field

[0001] The invention relates to a semitrailer protective structure, in particular to an assembled semitrailer rear protective net structure and an assembly method. Background Art

[0002] The domestic logistics industry is developing rapidly, and the semi-trailer with a barn is one of the main means of transportation. In order to improve safety, the rear lower part of the semi-trailer is generally equipped with corresponding protective devices, or protective devices with the same function, in order to prevent the rear vehicle from being rolled into the bottom and causing injury.

[0003] At present, the rear protection device of semi-trailers on the market is directly welded to the rear end of the semi-trailer to form a whole with the frame, or is externally bolted and fixed to the rear end of the semi-trailer.

[0004] The common problems they have are: complex production process, low efficiency, not conducive to the transportation of new cars in stacked cars, easy to cause the rear guard to fall off and be damaged during long-term use, and high repair costs for some fallen parts.

[0005] Figure 1 The figure shows the rear protective net structure of a common flatbed semi-trailer. This structure is directly welded to the rear of the semi-trailer, with a large amount of welding and high welding process requirements.

[0006] In order to solve the above problems, people have been seeking an ideal technical solution. Summary of the invention

[0007] The purpose of the present invention is to address the deficiencies of the prior art and thereby provide an assembled semi-trailer rear protective net structure that has modular manufacturing, efficient and simple replacement, high assembly efficiency, good adaptability, and can be disassembled for transportation.

[0008] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is: an assembled semi-trailer rear protection net structure, including a rear protection cross brace, at least two rear protection vertical braces and a web connecting plate, the bottom end of each rear protection vertical brace is welded to the upper surface of the rear protection cross brace, the rear protection vertical brace is a U-shaped groove structure, one side of the web connecting plate is fixed to the bottom of the U-shaped groove of the rear protection vertical brace, and a plurality of web connecting holes are arranged on the web connecting plate.

[0009] Based on the above, a positioning protrusion is provided on one side of the web connecting plate, and a positioning hole matching the positioning protrusion is provided at the bottom of the U-shaped groove of the rear protective support.

[0010] Based on the above, a support reinforcement plate is welded to the bottom of the U-shaped groove of the rear protective support, a positioning protrusion is provided on one side of the web connecting plate, and a positioning hole matching the positioning protrusion is provided on the support reinforcement plate.

[0011] Based on the above, it also includes a rear protective trolley block and an end beam connecting plate. The rear protective trolley block is welded to the outer top of the rear protective support. The top of the rear protective trolley block is provided with bolt holes, and the end beam connecting plate is also correspondingly provided with bolt holes. The upper end surface of the end beam connecting plate is the web welding surface.

[0012] Based on the above, the vertical support reinforcement plate is a long strip plate with a pointed bottom end.

[0013] Based on the above, the web connecting plate is a long strip plate having a row of vertically arranged web connecting holes.

[0014] Based on the above, the rear protective cart block includes a U-shaped iron and a connecting plate, the two ends of the connecting plate are respectively connected to the two side walls in the groove of the U-shaped iron, a through hole is opened on the connecting plate, and bolt holes are respectively opened on the two side walls of the U-shaped iron.

[0015] An assembly method based on the assembled semi-trailer rear protective net structure comprises the following steps:

[0016] 1) Measure the distance between the rear ends of the two longitudinal beams of the semi-trailer, preliminarily determine the distance between the two rear protection uprights, and weld the bottoms of the two rear protection uprights to the upper end surface of the rear protection cross brace according to the measured distance;

[0017] 2) Fix the web connecting plate to the web with bolts and determine the exact position of the web connecting plate;

[0018] 3) Align the positioning holes of the vertical support reinforcement plate with the positioning protrusions of the web connecting plate, determine the relative position of the vertical support reinforcement plate, and spot weld the vertical support reinforcement plate and the web connecting plate to initially fix them;

[0019] 4) Use the bracket to support the rear protection cross brace and the rear protection vertical brace, adjust the position of the rear protection cross brace and the rear protection vertical brace, so that the two vertical brace reinforcement plates can be placed in the U-shaped grooves of the two rear protection vertical braces respectively, and then spot weld the vertical brace reinforcement plates to the bottom of the U-shaped groove of the rear protection vertical brace to initially fix them;

[0020] 5) Remove the web connecting plate from the web, and then weld the spot welding positions firmly to fix the upright support reinforcement plate to the web connecting plate, and fix the upright support reinforcement plate to the bottom of the U-shaped groove of the rear protective upright support;

[0021] 6) Weld the rear protective trolley block to the front top position of the rear protective support, weld the end beam connecting plate to the tail end of the web, and then fix the end beam connecting plate and the rear protective trolley block with bolts.

[0022] Compared with the prior art, the present invention has outstanding substantial features and significant progress. Specifically, the present invention is divided into at least a rear protection cross brace, a rear protection vertical brace and a web connecting plate, which are connected to the web of the semi-trailer by bolt connection. The rear protection net is modularly designed, which has better assembly performance and reduces production difficulty, realizes the separation of the rear protection and the frame for transportation, and the internal assembly connection method is more secure.

[0023] Furthermore, a vertical support reinforcement plate is added, and a positioning structure is provided on the vertical support reinforcement plate and the web connecting plate to improve the accuracy of the equipment.

[0024] Furthermore, an end beam connecting plate and a rear protective trolley block are added to meet the structural strength requirements of functional vehicles such as forklifts, which are not easy to deform and have a more stable structure.

[0025] Furthermore, assembling according to the designed assembly steps can improve the assembly accuracy, especially the accuracy between the two rear protective uprights, and can also adapt to the requirements of semi-trailers of more sizes. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural diagram of a traditional semi-trailer.

[0027] Figure 2 It is a structural schematic diagram of the rear protective net structure of the assembled semi-trailer in the present invention.

[0028] Figure 3 It is a structural schematic diagram of the inner side of the rear protective net structure of the assembled semi-trailer in the present invention.

[0029] Figure 4 It is a schematic diagram of the structure of the rear protective net in a separated state in the present invention.

[0030] Figure 5 It is an exploded view of the rear protection net structure of the present invention.

[0031] Figure 6 It is a partial enlarged view of the rear protection net structure in the present invention.

[0032] Figure 7 It is a structural schematic diagram of the rear protective cart block in the present invention.

[0033] Figure 8 It is a structural schematic diagram of the web connecting plate in the present invention.

[0034] Fig. 9 It is a structural schematic diagram of the neutral support reinforcement plate of the present invention.

[0035] In the figure: 1. Carriage; 2. Carriage frame; 3. Rear protective net; 4. Web connecting hole; 5. Rear protective upright support; 6. Upright support reinforcement plate; 7. Web connecting plate; 8. End beam connecting plate; 9. Rear protective cross support; 10. Rear end beam; 11. Web; 12. Rear protective trolley block; 13. Positioning protrusion; 14. Positioning hole. DETAILED DESCRIPTION

[0036] The technical solution of the present invention is further described in detail below through specific implementation methods.

[0037] like Figure 1-Figure 9 As shown, a prefabricated semi-trailer rear protection net structure includes a rear protection cross brace 9, two rear protection vertical braces 5, a vertical brace reinforcement plate 6 and a web connecting plate 7, the bottom end of each rear protection vertical brace 5 is welded to the upper surface of the rear protection cross brace 9, the rear protection vertical brace 5 is a U-shaped groove structure, one side of the web connecting plate 7 is provided with a positioning protrusion 13, the bottom of the U-shaped groove of the rear protection vertical brace is provided with a positioning hole 14 matching the positioning protrusion 13, the positioning protrusion 13 is inserted into the positioning hole 14 to achieve positioning, the vertical brace reinforcement plate 6 is welded to the bottom of the U-shaped groove of the rear protection vertical brace 5, the vertical brace reinforcement plate is a long strip plate with a pointed bottom, and the web connecting plate 7 is a long strip plate with a row of vertically arranged web connecting holes 4.

[0038] In order to further strengthen the structural strength of the rear protective net and cope with the damage to the rear protective net by auxiliary equipment such as forklifts, it also includes a rear protective trolley block 12 and an end beam connecting plate 8. The rear protective trolley block 12 is welded to the outer top of the rear protective support 5. Bolt holes are provided on the top of the rear protective trolley block 12, and bolt holes are also correspondingly provided on the end beam connecting plate 8. The upper end surface of the end beam connecting plate 8 is the web welding surface.

[0039] The rear protective cart block 12 includes a U-shaped iron 12-1 and a connecting plate 12-2, the two ends of the connecting plate 12-2 are respectively connected to the two side walls of the groove of the U-shaped iron 12-1, a through hole 12-3 is opened on the connecting plate 12-2, and bolt holes 12-4 are respectively opened on the two side walls of the U-shaped iron 12-1.

[0040] The assembly method of the above-mentioned assembled semi-trailer rear protective net structure comprises the following steps:

[0041] 1) Measure the distance between the rear ends of the two longitudinal beams of the semi-trailer, preliminarily determine the distance between the two rear protective uprights, and weld the bottoms of the two rear protective uprights to the upper end surface of the rear protective cross brace according to the measured distance. In this step, the distance between the two rear protective uprights is an approximate distance, and a certain error is allowed, but the error must meet the installation requirements of the web connecting plate. The rough positioning method can reduce the requirements of the equipment, reduce the production cost, simplify the production process, and make up for the accuracy problem in step 1 through other subsequent components;

[0042] 2) Fix the web connecting plate to the web by bolts to determine the accurate position of the web connecting plate. In this step, the initial positioning of the web connecting plate 7 and the web 11 can be achieved by connecting the web connecting holes 4 with the corresponding holes on the web 11 by two or three bolts. The purpose is to determine the relative distance and height of the two web connecting plates 7, which has determined the installation basis for the subsequent steps;

[0043] 3) Align the positioning holes 14 of the vertical support reinforcement plate 6 with the positioning protrusions 13 of the web connecting plate 7 and insert them to determine the relative position of the vertical support reinforcement plate 6, and spot weld the vertical support reinforcement plate 6 and the web connecting plate 7 to initially fix them. Since the position of the web connecting plate 7 is accurate, the position of the vertical support reinforcement plate 6 is also accurate;

[0044] 4) Support the rear protection cross brace 9 and the rear protection vertical brace 5 with the help of the bracket, adjust the positions of the rear protection cross brace 9 and the rear protection vertical brace 5, so that the two vertical brace reinforcement plates 6 can be respectively placed in the U-shaped grooves of the two rear protection vertical braces 5, and then spot weld the vertical brace reinforcement plates 6 and the bottom of the U-shaped groove of the rear protection vertical brace 5 to initially fix them. In this step, the accuracy of the web connecting plate 7 is determined, the accuracy of the vertical brace reinforcement plates 6 is guaranteed, and then the installation accuracy of the two rear protection vertical braces is also guaranteed;

[0045] 5) Unscrew the bolts on the web connecting plate, remove the web connecting plate 7 from the web 11, and then weld the spot welding positions firmly to achieve the fixation between the vertical support reinforcement plate 6 and the web connecting plate 7, and the fixation between the vertical support reinforcement plate 6 and the bottom of the U-shaped groove of the rear protective vertical support 5. The purpose of this step is to ensure the structural strength;

[0046] 6) Weld the rear protective trolley block to the front top position of the rear protective support, weld the end beam connecting plate to the tail end of the web, and then fix the end beam connecting plate and the rear protective trolley block with bolts. In this step, the width of the rear protective trolley block is consistent with the width of the rear protective support. The two are aligned to achieve the welding accuracy requirements. The welding accuracy of the end beam connecting plate is determined by the position of the rear protective trolley block.

[0047] In summary, the rear protective net adopts a modular design and can be assembled according to the specific size of the semi-trailer. It has better adaptability, more reasonable structural design, and greater stability. Moreover, the assembly accuracy is determined through the reverse installation method and positioning structure, and the assembly efficiency is also more efficient, which reduces the precision requirements for the equipment production itself, makes it easier to produce, and has lower costs. The frame can be separated for transportation during transportation.

[0048] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the specific implementation methods of the present invention can still be modified or some technical features can be replaced by equivalents without departing from the spirit of the technical solution of the present invention, which should be included in the scope of the technical solution for protection of the present invention.

Claims

1. An assembled semi-trailer rear protection net structure, characterized by: The invention relates to a web connecting plate, wherein the bottom end of each rear protective vertical support is welded to the upper surface of the rear protective horizontal support, the rear protective vertical support is a U-shaped groove structure, one side of the web connecting plate is fixed to the bottom of the U-shaped groove of the rear protective vertical support, and a plurality of web connecting holes are arranged on the web connecting plate; one side of the web connecting plate is provided with a positioning protrusion, and the bottom of the U-shaped groove of the rear protective vertical support is provided with a positioning hole matching the positioning protrusion; the bottom of the U-shaped groove of the rear protective vertical support is welded with a vertical support reinforcement plate, one side of the web connecting plate is provided with a positioning protrusion, and the vertical support reinforcement plate is provided with a positioning hole matching the positioning protrusion; it also includes a rear protective trolley block and an end beam connecting plate, the rear protective trolley block is welded to the outer top end of the rear protective vertical support, the top of the rear protective trolley block is provided with a bolt hole, and the end beam connecting plate is also provided with a bolt hole accordingly, and the upper end surface of the end beam connecting plate is the web welding surface; Assemble using the following steps: The following steps are involved: 1) Measure the distance between the rear ends of the two longitudinal beams of the semi-trailer, preliminarily determine the distance between the two rear protection uprights, and weld the bottoms of the two rear protection uprights to the upper end surface of the rear protection cross brace according to the measured distance; 2) Fix the web connecting plate to the web with bolts and determine the exact position of the web connecting plate; 3) Align the positioning holes of the vertical support reinforcement plate with the positioning protrusions of the web connecting plate, determine the relative position of the vertical support reinforcement plate, and spot weld the vertical support reinforcement plate and the web connecting plate to initially fix them; 4) Use the bracket to support the rear protection cross brace and the rear protection vertical brace, adjust the position of the rear protection cross brace and the rear protection vertical brace, so that the two vertical brace reinforcement plates can be placed in the U-shaped grooves of the two rear protection vertical braces respectively, and then spot weld the vertical brace reinforcement plates to the bottom of the U-shaped groove of the rear protection vertical brace to initially fix them; 5) Remove the web connecting plate from the web, and then weld the spot welding positions firmly to fix the upright support reinforcement plate to the web connecting plate, and fix the upright support reinforcement plate to the bottom of the U-shaped groove of the rear protective upright support; 6) Weld the rear protective trolley block to the front top position of the rear protective support, weld the end beam connecting plate to the tail end of the web, and then fix the end beam connecting plate and the rear protective trolley block with bolts.

2. The rear protective net structure of an assembled semi-trailer according to claim 1 is characterized in that: The upright support reinforcement plate is a long strip plate with a pointed bottom end.

3. The rear protective net structure of an assembled semi-trailer according to claim 1 or 2, characterized in that: The web connecting plate is a long strip plate having a row of web connecting holes arranged vertically.

4. The rear protective net structure of an assembled semi-trailer according to claim 3 is characterized in that: The rear protective cart block includes a U-shaped iron and a connecting plate, the two ends of the connecting plate are respectively connected to the two side walls in the groove of the U-shaped iron, a through hole is provided on the connecting plate, and bolt holes are respectively provided on the two side walls of the U-shaped iron.

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