Trailer longitudinal beam and trailer

Abstract

The present invention provides a trailer longitudinal beam, comprising: a load-bearing section, an overlap section and a gooseneck section, wherein the overlap section is connected to the load-bearing section through the gooseneck section; the tops of the load-bearing section and the overlap section are both provided with a first energy-absorbing connection part, wherein the first energy-absorbing connection part comprises a mounting frame, a connection cover and a plurality of solid rubber balls. The trailer longitudinal beam and the trailer provided by the present invention are provided with a first energy-absorbing connection part on the load-bearing section and the overlap section of the trailer longitudinal beam, and when the trailer is bumped, the bump brings a downward impact force, and the impact force presses the connection cover downward, and the connection cover squeezes the solid rubber balls downward, wherein the rubber balls of the upper and lower layers squeeze each other and between the mounting frame and the connection cover, and the impact force is buffered and absorbed by the mutual friction between the rubber balls and the deformation of the rubber balls themselves, thereby avoiding the impact force from directly acting on the longitudinal beam, thereby extending the service life of the longitudinal beam.

Description

Technical Field

[0001] The invention relates to the field of trailers, and in particular to a longitudinal beam of a trailer. Background Art

[0002] A trailer is a vehicle towed by a car but without its own power drive device. The longitudinal beam is a key component of the frame and plays an important load-bearing role on the trailer.

[0003] Since the cargo carried by the trailer is heavy, the trailer longitudinal beam bears a large weight during use. When the trailer is driving, it encounters potholes on the road, causing the trailer to shake. When the trailer body interacts with the longitudinal beam, there is a certain impact force, which can easily cause the longitudinal beam to deform or even crack.

[0004] Therefore, it is necessary to provide a trailer longitudinal beam and a trailer to solve the above technical problems. Summary of the invention

[0005] The invention provides a trailer longitudinal beam and a trailer, which solves the problem that the existing trailer longitudinal beam is easily deformed and cracked when the trailer passes through a pothole road and bumps.

[0006] In order to solve the above technical problems, the trailer longitudinal beam provided by the present invention comprises:

[0007] A load-bearing section, an overlapping section and a gooseneck section, wherein the overlapping section is connected to the load-bearing section via the gooseneck section;

[0008] The top of the load-bearing section and the overlapping section are both provided with a first energy-absorbing connection part, the first energy-absorbing connection part comprises a mounting frame, a connection cover and a plurality of solid rubber balls, the mounting frame is integrally formed at the top of the load-bearing section and the overlapping section, the connection cover is movably mounted on the mounting frame, an energy-absorbing cavity is formed between the connection cover and the mounting frame, and the interior of the energy-absorbing cavity is filled with a plurality of solid rubber balls;

[0009] Among them, a plurality of the solid rubber balls are laid in the energy absorbing cavity in multiple layers, and the solid rubber balls located in the upper and lower layers are staggered.

[0010] Preferably, the first energy-absorbing connection part also includes a first fixing pin and a plurality of internal threaded holes and a strip cavity, the plurality of internal threaded holes are symmetrically opened on both sides of the installation frame, the plurality of strip cavities are symmetrically opened on both sides of the connecting cover, and the connecting cover and the strip cavity are arranged one by one, and one end of the first fixing pin passes through the strip cavity and is threadedly connected to the internal threaded hole.

[0011] Preferably, the load-bearing section includes a tail section, a middle section and a front section, and the tail section, the middle section and the front section are connected by a fixing piece, wherein one end of the tail section and an end of the middle section away from the tail section are both provided with a concave connecting portion, and one end of the front section and the middle section close to the tail section are both provided with a convex connecting portion, and the concave connecting portion and the convex connecting portion are both provided with mounting holes.

[0012] The present invention also provides a trailer using the trailer longitudinal beam, comprising a car body, two trailer longitudinal beams and a plurality of cross beams, wherein the plurality of cross beams are fixedly installed between the two trailer longitudinal beams, and the car body is installed between the two trailer longitudinal beams through a second fixing pin.

[0013] The fixing member comprises a U-shaped pin and two fixing holes, and the two fixing holes are symmetrically opened at two ends of the U-shaped pin;

[0014] The crossbeam comprises a crossbeam body, two first sockets, a plurality of connecting ears and a positioning shaft, the connecting ears are symmetrically arranged at both ends of the crossbeam body, the positioning shaft is fixed to the bottom of the connecting ears, and the two sockets are symmetrically arranged at both ends of the crossbeam body;

[0015] A plurality of first limit plates are provided on both sides of the carriage;

[0016] Wherein, when the cross beam is installed with the trailer longitudinal beam, the positioning shafts at both ends of the cross beam body are correspondingly inserted into the fixing holes on the U-shaped pins in the two trailer longitudinal beams;

[0017] When the carriage is installed with the trailer longitudinal beam, the first limit plates symmetrically arranged at the bottom of the carriage are inserted into the first sockets at both ends of the crossbeam body.

[0018] A second socket is provided on the side of the U-shaped pin away from the fixing hole, and a plurality of second limit plates are provided on both sides of the carriage; wherein, when the carriage is installed with the trailer longitudinal beam, the second limit plates are inserted into the second socket.

[0019] A plurality of mounting ears are installed on the outer side of the connecting cover, and threaded holes are opened on the mounting ears. A plurality of fixing ears are arranged on both sides of the carriage, and the bottom end of the second fixing pin passes through the fixing ear and is threadedly connected to the mounting ear, and the bottom end of the second fixing pin passes through the mounting ear.

[0020] Preferably, a first strip-shaped opening is formed on the end cap of the first fixing pin, and a second strip-shaped opening is formed on the bottom end of the second fixing pin.

[0021] Preferably, a plurality of first positioning blocks are provided on both sides of the connection cover and located above the first fixing pin, and a second positioning block is provided on the installation frame and located below the second fixing pin.

[0022] Preferably, a second energy absorbing connecting portion is provided on the crossbeam body.

[0023] Compared with the related art, the trailer longitudinal beam and trailer provided by the present invention have the following beneficial effects:

[0024] The present invention provides a trailer longitudinal beam and a trailer. A first energy absorbing connection portion is arranged on a load-bearing section and an overlap section of the trailer longitudinal beam. When the trailer bumps, the bump brings a downward impact force, and the impact force presses a connection cover downward, and the connection cover squeezes a solid rubber ball downward, wherein the rubber balls in the upper and lower layers are squeezed against each other and between the rubber balls and the mounting frame and the connection cover, and the impact force is buffered and absorbed through the mutual friction between the rubber balls and the deformation of the rubber balls themselves, thereby preventing the impact force from directly acting on the longitudinal beam and greatly extending the service life of the longitudinal beam. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 A schematic structural diagram of a preferred embodiment of a trailer longitudinal beam provided by the present invention;

[0026] Figure 2 for Figure 1 A schematic structural diagram of the longitudinal beam from another perspective shown;

[0027] Figure 3 for Figure 1 A sectional view of the portion shown;

[0028] Figure 4 for Figure 1 An enlarged schematic diagram of part A is shown;

[0029] Figure 5 for Figure 3 A schematic diagram of the plugging state of the female connecting part and the male connecting part shown;

[0030] Figure 6 for Figure 1 A schematic diagram of the structure of the fixing member shown;

[0031] Figure 7 A schematic diagram of the structure of the assembly of the longitudinal beam and the cross beam of the trailer provided by the present invention;

[0032] Figure 8 A schematic diagram of the partial structure of the assembly of the longitudinal beam and the cross beam of the trailer provided by the present invention;

[0033] Fig. 9 A schematic diagram of the partial structure of the trailer compartment provided by the present invention;

[0034] Fig.10 A schematic diagram of the assembly of an empty trailer compartment, longitudinal beams and cross beams provided by the present invention;

[0035] Fig.11A schematic diagram of the assembly of the trailer load compartment, longitudinal beam and cross beam provided by the present invention;

[0036] Fig.12 for Fig.10 An enlarged schematic diagram of part B is shown;

[0037] Fig.13 for Fig.11 An enlarged schematic diagram of part C is shown;

[0038] Fig.14 for Fig.13 A schematic structural diagram of the second fixing pin is shown.

[0039] Numbers in the figure:

[0040] 1. load-bearing section, 101. tail section, 102. middle section, 103. front section,

[0041] 2. Overlap section,

[0042] 3. Gooseneck section,

[0043] 4. first energy absorbing connection part, 41. mounting frame, 42. connection cover, 43. solid rubber ball, 44. strip cavity, 45. first positioning block, 46. second positioning block, 47. internal threaded hole, 48. mounting ear,

[0044] 5. First fixing pin, 51. Second strip opening,

[0045] 61. concave connection part, 62. convex connection part, 63. mounting hole,

[0046] 7. Fixing piece, 71. U-shaped pin, 72. Second socket, 73. Fixing hole,

[0047] 8. crossbeam, 81. crossbeam body, 82. first socket, 83. connecting ear, 84. second energy absorbing connecting part, 85. positioning shaft,

[0048] 9. Carriage, 91. Fixed ear, 92. First limit plate, 93. Second limit plate,

[0049] 10. A second fixing pin, 1001. A second strip-shaped opening. DETAILED DESCRIPTION

[0050] The present invention will be further described below in conjunction with the accompanying drawings and implementation modes.

[0051] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0052] The invention provides a trailer longitudinal beam.

[0053] Please refer to Figures 1 to 3 In one embodiment of the present invention, a trailer longitudinal beam comprises a load-bearing section 1, a lap section 2 and a gooseneck section 3, wherein the lap section 2 is connected to the load-bearing section 1 via the gooseneck section 3;

[0054] The top of the load-bearing section 1 and the overlapping section 2 are both provided with a first energy-absorbing connection part 4, which includes a mounting frame 41, a connection cover 42 and a plurality of solid rubber balls 43. The mounting frame 41 is integrally formed at the top of the load-bearing section 1 and the overlapping section 2, and the connection cover 42 is movably mounted on the mounting frame 41. An energy-absorbing cavity is formed between the connection cover 42 and the mounting frame 41, and the interior of the energy-absorbing cavity is filled with a plurality of solid rubber balls 43.

[0055] The plurality of solid rubber balls 43 are laid in the energy absorbing cavity in multiple layers, and the solid rubber balls 43 in the upper and lower layers are staggered.

[0056] By arranging the first energy-absorbing connection part 4 on the load-bearing section 1 and the overlapping section 2 of the trailer longitudinal beam, when the trailer is bumped during driving, the bump brings a downward impact force, the impact force presses the connection cover 42 downward, and the connection cover 42 squeezes the solid rubber ball 43 downward, wherein the upper and lower layers of the rubber balls 43 as well as the mounting frame 41 and the connection cover 42 squeeze each other, and the impact force is buffered and absorbed by the mutual friction between the rubber balls 43 and the deformation of the rubber balls 43 themselves, thereby avoiding the impact force from directly acting on the longitudinal beam, and greatly extending the service life of the longitudinal beam.

[0057] The solid rubber ball 43 may be 2-layer or 3-layer. Figure 3 In the embodiment, two layers are preferably provided, and the solid rubber balls 43 of the upper and lower layers are staggered. When a downward extrusion force occurs, the solid rubber balls 43 of the upper layer can press downward the contact position between the two solid rubber balls 43 of the lower layer, so that the friction force between the upper solid rubber balls 43 and the lower solid rubber balls 43 can be used to increase the resistance effect, and the elastic deformation of the solid rubber balls 43 themselves can be combined to achieve a better buffering and energy absorption effect.

[0058] Reinforcement plates are provided on the upper side and the lower side of the gooseneck section 3 to improve the strength of the gooseneck section 3 .

[0059] The cross section of the longitudinal beam is a T-shaped surface.

[0060] The connection cover 42 and the installation frame 41 can slide up and down relative to each other, and the connection cover 42 is buckled on the installation frame 41. In one embodiment, the connection cover 42 and the installation frame 41 can be installed by providing a slider on the peripheral side of the connection cover 42, and a sliding cavity is opened on the connection cover 42, and the sliding cavity and the sliding cavity are slidably matched.

[0061] Please see attached Figure 4 In another embodiment, the first energy absorbing connection part 4 further includes a first fixing pin 5 and a plurality of internal threaded holes 47 and a strip cavity 44, wherein the plurality of internal threaded holes 47 are symmetrically arranged on both sides of the installation frame 41, and the plurality of strip cavities 44 are symmetrically arranged on both sides of the connection cover 42, and the connection cover 42 and the strip cavity 44 are arranged in a one-to-one correspondence, and one end of the first fixing pin 5 passes through the strip cavity 44 and is threadedly connected to the internal threaded hole 47.

[0062] By opening strip cavities 44 and internal threaded holes 47 on both sides of the connecting cover 42, when the connecting cover 42 and the mounting frame 41 are installed, the connecting cover 42 is buckled on the mounting frame 41, wherein the internal threaded holes 47 are located correspondingly in the strip hole 44. At this time, the first fixing pin 5 can pass through the strip cavity 44 and then be connected to the threaded hole 47. The installation operation of the connecting cover 42 and the mounting frame 41 is simple and convenient.

[0063] The length of the strip-shaped cavity 44 is longer than the diameter of the first fixing pin 5 , so that the connecting cover 42 can move up and down relative to the installation frame 41 .

[0064] The first fixing pin 5 comprises an end cap and a pin body, and an end of the pin body away from the end cap is provided with an external thread matched with the internal thread hole 47 .

[0065] The internal threaded hole 47 may also be provided with a nut pre-set on the mounting frame 41 .

[0066] Please see attached Figure 1 , Figure 2 , Figure 3 and Figure 5 The load-bearing section 1 includes a tail section 101, a middle section 102 and a front section 103, and the tail section 101, the middle section 102 and the front section 103 are connected by a fixing member 7, wherein one end of the tail section 101 and the end of the middle section 102 away from the tail section 101 are both provided with a concave connecting portion 61, and the front section 103 and the end of the middle section 102 close to the tail section 101 are both provided with a convex connecting portion 62, and the concave connecting portion 61 and the convex connecting portion 62 are both provided with mounting holes 63.

[0067] By configuring the load-bearing section 1 to include the tail section 101, the middle section 102 and the front section 103, when one of the load-bearing sections 1 is deformed or cracked, the deformed or cracked part can be replaced accordingly without replacing the entire longitudinal beam, thus saving costs.

[0068] The middle section 102 is at least one, preferably three sections, wherein the tail section 103 is integrally formed with the gooseneck section 3;

[0069] By providing the convex connection part 62 and the concave connection part 61, when the tail section 101 is connected to the middle section 102, or the adjacent middle sections 102 are connected, or the middle section 102 is connected to the front section 103, the convex connection part 62 and the concave connection part 61 at the end are correspondingly engaged, and the convex connection part 62 and the concave connection part 61 are engaged to improve the support force of the connection, and the concave connection part 61 and the convex connection part 62 are thickened, which is thickened relative to other positions of the load-bearing section 1, thereby ensuring the stability of the connection;

[0070] As attached Figure 5 In the embodiment, the installation frame 41 is correspondingly divided into multiple sections, and the connection cover 42 is kept as a whole and is not correspondingly divided.

[0071] In this embodiment, the fixing member 7 includes a U-shaped pin 71, a fixing hole 73, a bolt and a nut. There are two fixing holes 73, which are symmetrically opened at the two ends of the U-shaped pin 71. The U-shaped pin 71 is correspondingly inserted into the mounting holes 63 on the male connecting portion 62 and the female connecting portion 61, and then penetrates out. Then, the bolt is inserted into the fixing hole 73 and tightened with the nut.

[0072] Preferably, each set of male connection parts 67 and female connection parts 61 is provided with two U-shaped pins 71 .

[0073] Please refer to the attached Figures 4 to 13 A trailer using a trailer longitudinal beam comprises a carriage 9, two trailer longitudinal beams and a plurality of cross beams 8, wherein the plurality of cross beams 8 are fixedly installed between the two trailer longitudinal beams, and the carriage 9 is installed between the two trailer longitudinal beams through a second fixing pin 10.

[0074] By using the longitudinal beam bearing carriage 9 with the first energy absorbing connecting portion 4, the impact force on the longitudinal beam caused by bumps and the like during driving is buffered and absorbed, thereby extending the service life of the longitudinal beam.

[0075] The number of the cross beams 8 connected to the load-bearing section 1 is the same as the number of the groups of the male connecting parts 62 and the female connecting parts 61 .

[0076] There are preferably two cross beams 8 connected to the overlapping section 2 .

[0077] Please refer to the attached Figures 7 to 9In this embodiment, the fixing member 7 includes a U-shaped pin 71 and two fixing holes 73, and the two fixing holes 73 are symmetrically opened at both ends of the U-shaped pin 71;

[0078] The cross beam 8 comprises a cross beam body 81, two first sockets 82, a plurality of connecting ears 83 and a positioning shaft 85. The connecting ears 83 are symmetrically arranged at both ends of the cross beam body 81. The positioning shaft 85 is fixed to the bottom of the connecting ears 83. The two sockets 82 are symmetrically arranged at both ends of the cross beam body 81.

[0079] A plurality of first limit plates 92 are provided on both sides of the carriage 9;

[0080] When the cross beam 8 is installed with the trailer longitudinal beam, the positioning shafts 85 at both ends of the cross beam body 81 are correspondingly inserted into the fixing holes 73 on the U-shaped pins 71 in the two trailer longitudinal beams;

[0081] When the carriage 9 is installed with the trailer longitudinal beam, the first limit plates 92 symmetrically arranged at the bottom of the carriage 9 are inserted into the first sockets 82 at both ends of the crossbeam body 81 .

[0082] The U-shaped pin 71 can be limited by inserting the positioning shafts 85 symmetrically arranged at both ends of the cross beam 8 into the fixing holes 73 on the U-shaped pin 71, and the embedded concave connecting portion 61 and the convex connecting portion 62 can be fixed and limited. Then, when installing the car body 9, the first limiting plate 92 at the bottom of the car body 9 is inserted into the first sockets 82 at both ends of the cross beam 8, and the car body 9 and the longitudinal beam are fixedly installed, so that the vertical direction of the cross beam 8 and the longitudinal beam can be limited. The first limiting plate 92 assists in limiting the car body 9 and the frame composed of the cross beam 8 and the longitudinal beam, so that only the car body 9 and the longitudinal beam need to be fixedly installed, that is, the fixed limiting of the cross beam 8 and the longitudinal beam, as well as the multi-section assembly of the longitudinal beam itself, can be completed at the same time, and the assembly operation is simple, and it is convenient to replace the damaged section of the longitudinal beam.

[0083] At the same time, the weight of the carriage 9 is used to limit the crossbeam in the vertical direction, so that the positioning shafts 85 at both ends of the crossbeam 8 can be stably located inside the U-shaped pin 71, thereby stably limiting and fixing the assembly points of the multiple sections of the longitudinal beam.

[0084] The crossbeam 8 connected to the overlap section 2 is fixedly installed by bolts, and corresponding assembly holes are opened on the overlap section 2;

[0085] A mounting block is provided at the end of the tail section 101, and a mounting hole is provided on the mounting block for fitting bolts for mounting the tail plate.

[0086] Please refer again to the attached Figures 6 to 9A second socket 72 is provided on the side of the U-shaped pin 71 away from the fixing hole 73, and a plurality of second limit plates 93 are provided on both sides of the carriage 9; wherein, when the carriage 9 is installed with the trailer longitudinal beam, the second limit plate 93 is inserted into the second socket 72.

[0087] By inserting the second limiting plate 93 at the bottom of the side of the car body 9 into the second socket 72 on the U-shaped pin 71, and cooperating with the first limiting plate 92 at the bottom of the car body 9 to be inserted into the first sockets 82 at both ends of the cross beam 8, the first limiting plate 92 and the second limiting plate 93 can assist in limiting the connection between the concave connection part 61 and the convex connection part 62 in the longitudinal beam load-bearing section 1 to avoid misalignment and make the connection more stable.

[0088] A plurality of mounting ears 48 are installed on the outer side of the connecting cover 42, and threaded holes are opened on the mounting ears 48. A plurality of fixing ears 91 are arranged on both sides of the carriage 9, and the bottom end of the second fixing pin 10 passes through the fixing ear 91 and is threadedly connected to the mounting ear 48, and the bottom end of the second fixing pin 10 passes through the mounting ear 48.

[0089] The number and position of the mounting ears 48 and the fixing ears 91 are correspondingly arranged, and a threaded hole is provided in the mounting ears 48. When installing the carriage 9, the second fixing pin 10 is passed through the fixing ears 91 and threadedly connected with the threaded hole on the mounting ears 48, thereby completing the installation of the carriage 9, and the operation is simple;

[0090] A fixing nut may also be embedded on the mounting ear 48, and an end of the second fixing pin 10 close to the end cap is provided with an external thread.

[0091] In this embodiment, the principle of assembling the longitudinal beam, the cross beam 8 and the carriage 9 is as follows:

[0092] First, the front section 103 connected to the overlap section 2 in the longitudinal beam is connected to the middle section 102, the middle sections 102 are connected to each other, and the middle section 102 is connected to the tail section 101. When connecting, the concave connecting part 61 and the convex connecting part 62 are correspondingly engaged, and then the U-shaped pin 71 is correspondingly passed through the mounting holes 63 on the concave connecting part 61 and the convex connecting part 62;

[0093] Then, the two longitudinal beams are spaced apart, and the cross beam 8 on the load-bearing section 1 is installed in sequence. During installation, the positioning shafts 85 at both ends of the cross beam 8 are inserted into the fixing holes 73 on the U-shaped pin 71, and then the cross beam on the connecting overlap section 2 and the tail plate can be installed;

[0094] When installing the carriage 9, the first limit plate 92 at the bottom of the carriage 9 is correspondingly inserted into the first sockets 82 at both ends of the crossbeam 8, and the second limit plate 93 at the bottom of the outer side of the carriage 9 is correspondingly inserted into the second socket 72 on the outer side of the U-shaped pin 71. At this time, the fixing ear 91 on the outer side of the carriage 9 corresponds to the mounting ear 48 on the connecting cover 42, and then the second fixing pin 10 is correspondingly passed through the fixing ear 91 and threadedly connected to the connecting cover 42, thereby completing the installation;

[0095] When a section of the longitudinal beam is deformed or cracked, the deformed or cracked section of the longitudinal beam can be replaced by removing the second fixing pin 10 and then removing the first fixing pin 5 at the corresponding connection position, and the replacement operation is convenient.

[0096] Please refer to the attached Figure 4 and Fig.12 A first strip-shaped opening 51 is formed on the end cap of the first fixing pin 5 , and a second strip-shaped opening 1001 is formed on the bottom end of the second fixing pin 10 .

[0097] A plurality of first positioning blocks 45 are disposed on both sides of the connection cover 42 and above the first fixing pin 5 , and a second positioning block 46 is disposed on the installation frame 41 and below the second fixing pin 10 .

[0098] When the carriage 9 is in a state from empty to loaded, as shown in the attached Figure 10 to Figure 11 As the weight of the carriage 9 increases, the connecting cover 42 presses down the solid rubber ball 43. At this time, the connecting cover 42 moves downward, thereby driving the first positioning block 45 to be inserted into the first strip opening 51 on the end cap of the first fixing pin 5. At the same time, the connecting cover 42 moves downward, that is, the second fixing pin 10 moves downward accordingly, so that the second strip opening 1001 at the bottom end of the second fixing pin 10 can be inserted into the second positioning block 46, thereby avoiding the problem of loosening of the first fixing pin 5 and the second fixing pin 10 due to vibration during the driving of the trailer, making the connection more stable.

[0099] After the first fixing pin 5 is tightened with the internal threaded hole 47 , the first strip opening 51 thereon is located at the upper side and corresponds to the first positioning block 45 . Similarly, when the second fixing pin 10 is tightened with the mounting ear 48 , the second strip opening 1001 at the bottom corresponds to the second positioning block 46 .

[0100] The cross beam body 81 is provided with a second energy absorbing connection portion 84 .

[0101] The second energy absorbing connection part 84 has the same principle as the first energy absorbing connection part 4, and both include a connection cover 42, a solid rubber ball 43, a strip cavity 44, a first positioning block 45, a first fixing pin 5 and an internal threaded hole 47, wherein the difference is that a groove is downwardly arranged on the top of the cross beam body 81, the bottom of the connection cover 42 extends to the inside of the groove, and the internal threaded hole 47 is located on the connection cover 42, the strip cavity 44 is opened on both sides of the cross beam body 81 and communicates with the groove, the first fixing pin 5 passes through the strip cavity 44 and is connected with the threaded hole 47, wherein the first positioning block 45 is arranged on the cross beam body 81 and is located below the first fixing pin 5, as shown in the attached Figure 8 By providing the second energy absorbing connection part 84 and supporting the carriage 9 through the second energy absorbing connection part 84, the energy absorbing function can be better played in buffering and absorbing in cooperation with the first energy absorbing connection part 4.

[0102] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A trailer, characterized in that: include: A carriage, two trailer longitudinal beams and a plurality of cross beams, wherein the plurality of cross beams are fixedly installed between the two trailer longitudinal beams, and the carriage is installed between the two trailer longitudinal beams through a second fixing pin; The trailer longitudinal beam comprises a load-bearing section, a lap section, a gooseneck section and a connection cover, the load-bearing section comprises a tail section, a middle section and a front section, the tail section, the middle section and the front section are connected by a fixing member, wherein one end of the tail section and one end of the middle section away from the tail section are both provided with a concave connection part, and one end of the front section and the middle section close to the tail section are both provided with a convex connection part, and the concave connection part and the convex connection part are both provided with a mounting hole; The overlapping section is connected to the load-bearing section via a gooseneck section; The top of the load-bearing section and the overlapping section are both provided with a first energy-absorbing connection part, the first energy-absorbing connection part comprises a mounting frame, a connection cover and a plurality of solid rubber balls, the mounting frame is integrally formed at the top of the load-bearing section and the overlapping section, the connection cover is movably mounted on the mounting frame, an energy-absorbing cavity is formed between the connection cover and the mounting frame, and the interior of the energy-absorbing cavity is filled with a plurality of solid rubber balls; Wherein, a plurality of the solid rubber balls are laid in the energy absorbing cavity in multiple layers, and the solid rubber balls located in the upper and lower layers are staggered; The fixing member comprises a U-shaped pin and two fixing holes, and the two fixing holes are symmetrically opened at two ends of the U-shaped pin; The crossbeam comprises a crossbeam body, two first sockets, a plurality of connecting ears and a positioning shaft, the connecting ears are symmetrically arranged at both ends of the crossbeam body, the positioning shaft is fixed to the bottom of the connecting ears, and the two sockets are symmetrically arranged at both ends of the crossbeam body; A plurality of first limit plates are provided on both sides of the carriage; Wherein, when the cross beam is installed with the trailer longitudinal beam, the positioning shafts at both ends of the cross beam body are correspondingly inserted into the fixing holes on the U-shaped pins in the two trailer longitudinal beams; When the carriage is installed with the trailer longitudinal beam, the first limit plates symmetrically arranged at the bottom of the carriage are inserted into the first sockets at both ends of the crossbeam body; A second socket is provided on one side of the U-shaped pin away from the fixing hole, and a plurality of second limit plates are provided on both sides of the carriage; wherein, when the carriage is installed with the trailer longitudinal beam, the second limit plates are inserted into the second socket; A plurality of mounting ears are installed on the outer side of the connecting cover, and threaded holes are opened on the mounting ears. A plurality of fixing ears are arranged on both sides of the carriage, and the bottom end of the second fixing pin passes through the fixing ear and is threadedly connected to the mounting ear, and the bottom end of the second fixing pin passes through the mounting ear.

2. The trailer according to claim 1, characterized in that: A second energy absorbing connecting portion is arranged on the cross beam body.

3. The trailer according to claim 1, characterized in that: The first energy-absorbing connection part also includes a first fixing pin and a plurality of internal threaded holes and a strip cavity. The plurality of internal threaded holes are symmetrically opened on both sides of the installation frame, and the plurality of strip cavities are symmetrically opened on both sides of the connection cover, and the connection cover and the strip cavity are arranged in a one-to-one correspondence. One end of the first fixing pin passes through the strip cavity and is threadedly connected to the internal threaded hole.

4. The trailer according to claim 3, characterized in that: A first strip-shaped opening is formed on the end cap of the first fixing pin, and a second strip-shaped opening is formed on the bottom end of the second fixing pin.

5. The trailer according to claim 1, characterized in that: A plurality of first positioning blocks are arranged on both sides of the connection cover and on the upper side of the first fixing pin, and a second positioning block is arranged on the installation frame and below the second fixing pin.

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