An integrated refrigerated semi-trailer

Abstract

A new type of integrated refrigerated semi-trailer, a traction plate is integrally arranged on the frame car; a connection structure is arranged between the frame car and the refrigerated car body, and the connection structure includes a central connection structure, a side connection structure and a rear end connection structure; and a wind resistance reduction structure is also included, and the wind resistance structure includes a large arc angle profile arranged at the corners on both sides of the front of the refrigerated car body and arc profiles on both sides of the front end of the traction plate. A modular design is adopted to divide the semi-trailer into an upper module-refrigerated car body and a lower module-straight beam frame car; the upper and lower parts are assembled together by fasteners to form an integral semi-trailer. The through beam of the frame car is used for floor bearing, and the cross beam is made on the frame car, and the through beam is adopted. The upper plane of the through beam is flush with the plane of the frame car, which reduces the height of the bearing surface. With the same height limit, the height of the car body is increased, and the internal volume is increased.

Description

Technical Field

[0001] The invention relates to the field of transportation equipment, in particular to an integrated refrigerated semi-trailer. Background Art

[0002] A semitrailer is a trailer with the axle placed behind the center of gravity of the vehicle (when the vehicle is evenly loaded) and equipped with a coupling device that can transmit horizontal and vertical forces to the tractor. The integrated refrigerated semitrailer in the prior art often has the following defects:

[0003] (1) Currently, most integrated refrigerated semi-trailers use a split car body (also known as a semi-trailer upper body) plus a frame car (also known as a semi-trailer lower body), and the car body and the frame car are connected by angle locks in combination with bolts and nuts. This structure is not actually a truly integrated refrigerated semi-trailer. Its connection performance and load-bearing performance often do not achieve very good results. Its connection is unreliable. The angle lock method is used at the connection between the car body and the frame car, which will produce gaps and poor connection performance. Moreover, due to structural reasons, it is easy to damage and has a short service life. During actual use, the car body and the frame car will shake due to transportation, causing impact and wear, which will cause welding failure at the welding joints between the car body and the frame car, and cause bolt failure at the bolt connection between the car body and the frame car, which will cause damage to the car body and reduce its service life.

[0004] (2) The current semi-trailer towing disc is fixed to the beam of the semi-trailer and is fixedly connected to the tractor through a towing pin. The conventional towing disc is only concentrated between the beams of the frame vehicle. Its load-bearing capacity is poor and its connectivity with the vehicle body is not high. Since the towing disc is equipped with a towing pin at the bottom and the tractor is connected to the towing pin at the bottom of the semi-trailer, the durability of the towing disc is often poor due to the frequent tossing and undoing of the towing disc by the rear of the tractor. Since the towing pin is subjected to the traction force of the tractor in the forward direction of the semi-trailer during use, it is easy to deform, desolder or even fail during long-term use, causing danger.

[0005] (3) The skeleton of the current refrigerated semi-trailer (also known as the lower part of the semi-trailer) is mainly composed of a skeleton beam connected to a towing plate. Due to the simple structure of the lower part and poor bearing capacity, once the transportation capacity increases, it will cause excessive pressure on the skeleton beam, which is easy to damage the skeleton beam and the safety cannot be guaranteed. Therefore, it is not suitable for large-capacity refrigerated transportation. In addition, since the opening and closing door of the refrigerated semi-trailer body (also known as the upper part of the semi-trailer) is set in the middle of the refrigerated semi-trailer, the middle part of the skeleton often bears the bearing pressure caused by loading and unloading for a long time due to frequent loading and unloading and manual handling. There has been no targeted structural reinforcement at this location, so it is prone to damage.

[0006] (4) As the weight of cargo transported by refrigerated semi-trailers is relatively high, a 40-ton refrigerated semi-trailer is usually subjected to great wind resistance during transportation due to its heavy weight. Currently, there is no specially developed wind resistance reduction structure for refrigerated semi-trailers, which is not conducive to the use of refrigerated semi-trailers. Summary of the invention

[0007] In order to solve the above-mentioned problems, the present invention discloses an integrated refrigerated semi-trailer, and its specific technical solution is as follows: an integrated refrigerated semi-trailer comprises a skeleton vehicle and a refrigerated compartment, the skeleton vehicle is provided with two skeleton vehicle beams, and a traction plate is integrally provided on the skeleton vehicle; the traction plate comprises a mounting plate, and a traction pin is fixedly provided at the bottom of the mounting plate; and further comprises a plurality of load-bearing cross beams, guide plates and longitudinal reinforcing ribs fixedly provided on the skeleton vehicle beams;

[0008] A connection structure is provided between the skeleton vehicle and the refrigerated vehicle body, and the skeleton vehicle and the refrigerated vehicle body are connected and fixed to each other through the connection structure; the connection structure includes a central connection structure, a side connection structure and a rear end connection structure;

[0009] It also includes a wind resistance reduction structure, which includes large arc angle profiles arranged at the corners on both sides of the front of the refrigerated compartment and arc profiles on both sides of the front end of the traction disk, the large arc angle profiles are located above the arc profiles, and the large arc angle profiles correspond to the shapes of the arc profiles.

[0010] Furthermore, the central connection structure includes a reinforcing rib fixedly arranged inside the bottom plate of the vehicle body, a through-beam of the skeleton vehicle fixedly arranged on the beam of the skeleton vehicle, and a self-tapping screw. A round hole is arranged on the top of the through-beam of the skeleton vehicle. The self-tapping screw passes through the round hole on the top of the through-beam of the skeleton vehicle from bottom to top and is embedded in the reinforcing rib on the vehicle body, so as to realize the fixed connection between the beam of the skeleton vehicle and the vehicle body.

[0011] The side connection structure includes a bottom side beam of the car body, end plates and screws arranged on both sides of the through-beam of the skeleton car, a plurality of first holes are arranged at the bottom of the bottom side beam; a plurality of second holes are arranged on the end plate, and the number, shape, size and position of the first holes correspond to the number, shape, size and position of the second holes, and the screws are passed through the first holes from the outside to the inside in sequence and connected and fixed with the second holes in cooperation with nuts, so as to realize the fixed connection between the bottom side beam of the car body and the end plate;

[0012] The rear-end connection structure includes a plurality of nut blocks embedded in the rear frame of the carriage, a rear connection plate of the skeleton vehicle and bolts; the rear connection plate of the skeleton vehicle is an L-shaped plate structure, fixedly arranged at the end position on the frame beam of the skeleton vehicle, and the rear connection plate of the skeleton vehicle is located at the bottom position of the rear frame of the carriage, and the shape and size of the rear connection plate of the skeleton vehicle correspond to the shape and size of the rear frame of the carriage, and one side of the bottom of the rear frame of the carriage is fitted with the rear connection plate of the skeleton vehicle; a plurality of connection holes are arranged on the rear connection plate of the skeleton vehicle, and the size, shape and position of the connection holes correspond to the size, shape and position of the nut blocks embedded in the rear frame of the carriage; the bolts pass through the connection holes and penetrate the rear frame of the carriage, and cooperate with the nut blocks inside the rear frame of the carriage to achieve a fixed connection.

[0013] Furthermore, two grooves are symmetrically arranged on the top of the through-beam of the frame vehicle, so that the through-beam of the frame vehicle is a W-shaped structure; a plurality of evenly distributed through holes are opened on the two frame vehicle beams, and the two grooves of the through-beam of the frame vehicle respectively pass through the through holes corresponding to the two frame vehicle beams, and the through-beam at the groove is fixedly connected to the frame vehicle beam by welding; so that the top of the through-beam of the frame vehicle and the top of the frame vehicle beam are located in the same horizontal plane; the two ends of the through-beam of the frame vehicle are symmetrically arranged on both sides of the two frame vehicle beams;

[0014] An end plate is symmetrically welded on both sides of the through beam of the skeleton vehicle, the end plate is a square structure, four second holes are arranged on the end plate, and the four second holes are evenly distributed at the four corners of the end plate. The end plate is fixedly connected to the bottom side beam of the car body through the second holes with bolts and nuts;

[0015] Further, the load-bearing crossbeam includes a first crossbeam and a second crossbeam, a plurality of the first crossbeams are fixedly arranged on both sides of the frame vehicle beam symmetrically, and the first crossbeams are located on both sides of the mounting plate; a plurality of the second crossbeams penetrate the two frame vehicle beams, and the second crossbeams are located on the front and rear sides of the mounting plate; the first crossbeams and the second crossbeams are arranged in parallel;

[0016] The guide plate is fixedly arranged at the bottom of the frame vehicle beam, and includes a first guide plate and a second guide plate. The first guide plate is fixedly arranged at the front end of the frame vehicle, and an upwardly bent edge is arranged at the front end of the first guide plate, and the edge is located at the outer side of the front end beam of the frame vehicle; the second guide plate is located at one side of the first guide plate, and an arc-shaped notch is arranged at one side of the second guide plate;

[0017] There are multiple longitudinal reinforcing ribs, which are fixedly arranged between multiple second beams at the front end of the mounting plate.

[0018] Furthermore, the cross section of the load-bearing crossbeam is a Z-shaped structure, and the first crossbeam and the second crossbeam are both welded to the frame vehicle beam.

[0019] Furthermore, the longitudinal reinforcement ribs are in groups, which are welded and fixed between the front end beam of the skeleton vehicle and the second cross beam, between the two second cross beams, and between the second cross beam and the mounting plate; the number of longitudinal reinforcement ribs in each group is two, and the two longitudinal reinforcement ribs in each group are arranged opposite to each other. The longitudinal reinforcement ribs are an inverted L-shaped structure, and a plurality of threading holes are provided on the longitudinal reinforcement ribs.

[0020] Furthermore, side beams are fixedly provided on both sides of the first cross beam and the second cross beam, the side beams are vertically welded to the first cross beam and the second cross beam, the cross section of the side beam is a C-shaped structure, and a plurality of side beam connecting holes are provided on the side beam.

[0021] Furthermore, the second cross beam is a W-shaped structure, and two recesses are arranged on the second cross beam. The cross section of the frame vehicle beam is an I-shape. When the second cross beam is connected to the frame vehicle beam by through-welding, the top edge of the frame vehicle beam is embedded in the recess, so that the top surface of the frame vehicle is kept horizontal.

[0022] Furthermore, the mounting plate is welded to the bottom beam of the semi-trailer frame to form an integrated structure.

[0023] Furthermore, the thickness of the first guide plate is slightly smaller than the thickness of the second guide plate.

[0024] Furthermore, the first guide plate and the second guide plate are both provided with connecting holes.

[0025] Furthermore, the connecting hole is one or more of a waist-shaped hole, a circular hole, an elliptical hole, a square hole, a trapezoidal hole, an L-shaped hole, and a regular hexagonal hole.

[0026] Furthermore, the end plate is a square structure, and four second holes are arranged on each of the end plates, and the four second holes are evenly distributed at the four corners of the end plate.

[0027] Furthermore, the cross-section of the skeleton vehicle through-beam is a Z-shaped structure, the skeleton vehicle through-beam penetrates two skeleton vehicle beams, and two ends of the skeleton vehicle through-beam are located on both sides of the two skeleton vehicle beams.

[0028] Furthermore, the cross-section of the reinforcing rib is an I-shaped structure.

[0029] Furthermore, the rear connecting plate of the skeleton vehicle is located between two skeleton vehicle beams.

[0030] Furthermore, the first hole is a circular hole structure, the second hole is a circular hole structure, and the connecting hole is a waist-shaped hole structure.

[0031] The beneficial effects of the present invention are

[0032] The semi-trailer adopts modular design and is divided into an upper module refrigerated compartment and a lower module straight beam skeleton car; the upper and lower modules are assembled together through fasteners to form an integral semi-trailer. A special connection structure is set up to carry out fixed connections of different structures at three different positions between the skeleton car and the center, side and rear end of the car body, so that the skeleton car and the car body can be made into an integrated whole to the greatest extent, which is not easy to separate and has reliable connection. The self-tapping screws are used to connect directly through the crossbeam and the reinforcement ribs inside the car body, which is not easy to produce gaps and has a good connection effect. The rear end and the side adopt a multi-point fixed connection method. Even if shaking occurs, due to the multi-point fixation, the connection structure is not easy to be damaged, the service life is long, and the use effect is good.

[0033] (2) The unique integrated structure of the traction plate, the mounting plate is directly welded to the frame of the frame vehicle, and the welded load-bearing crossbeam makes the traction plate and the frame vehicle form a whole, with high bearing capacity and good use effect.

[0034] The traction plate has multiple load-bearing crossbeam structures to greatly improve its load-bearing capacity. The special W-shaped structure of the load-bearing crossbeam can ensure that the load-bearing surface of the crossbeam is flush with the load-bearing surface of the frame vehicle beam, thus forming a complete load-bearing surface, which can ensure good load-bearing and ensure that the load-bearing capacity of objects in the upper body is transferred to the frame vehicle crossbeam.

[0035] The structure of connecting the side beams on both sides of the load-bearing crossbeam, connecting multiple load-bearing crossbeams into a whole through the side beams, so that the traction disk forms a frame structure, which improves the strength of the traction disk as a part of the installation on the one hand, and improves the bearing capacity of the underframe as the upper part on the other hand. The side beams are used to adjust the welding deformation of the crossbeams to avoid poor precision caused by welding deformation of multiple crossbeams.

[0036] A plurality of longitudinal reinforcing ribs are arranged at the front end of the towing pin mounting plate, so that when the tractor tows the towing pin, the forward longitudinal traction force is distributed to a plurality of cross beams, thereby avoiding deformation, desoldering and even failure of the towing pin caused by long-term stress, thereby ensuring the service life of the towing pin.

[0037] A two-piece guide plate structure is set, and the front guide plate is set with a folding structure to protect the front beam of the skeleton car and avoid wear. The front guide plate is made of thin steel, which can protect the bottom of the traction plate while reducing weight; an arc-shaped notch is set at the center of the end of the rear guide plate to reduce weight. Due to national regulations, the total load-bearing mass (cargo weight plus deadweight) of the semi-trailer is 40 tons. Under the premise of ensuring safety, the lighter the deadweight of the semi-trailer, the greater the cargo capacity, which can effectively improve economic benefits.

[0038] (3) The through beam is located under the frame vehicle beam. With its unique W-shaped structure, the upper end surface of the through beam is flush with the upper plane of the frame vehicle beam, and the top surface of the frame vehicle is flat, which can ensure that there is no gap caused by uneven surface when the frame vehicle is connected to the body, avoiding the instability of the connection between the upper and lower parts of the semi-trailer.

[0039] The through beam adopts C-shaped or Z-shaped beam structure, which has high strength and strong bearing capacity. The through beam is pressed into W shape by special equipment, and the installation hole is opened at the corresponding position of the frame vehicle beam. The through beam passes through the installation hole on the beam and is welded with the beam to have high bearing capacity. Long end plates are welded to the through beam in the middle of the frame vehicle to connect the through beam into a whole, improve the overall strength, and avoid the frequent loading and unloading of goods and manual handling caused by insufficient bearing capacity, resulting in connection failure or damage to the frame vehicle beam.

[0040] The through-beam of the frame car is used for floor bearing. The crossbeam is made on the frame car and adopts the form of a through-beam. The upper plane of the through-beam is flush with the plane of the frame car, which reduces the height of the bearing surface. With the same height limit, the height of the car body is increased and the internal volume is increased.

[0041] (4) A special design for reducing wind resistance is adopted. The large arc-shaped corner profiles at the corners on both sides of the front of the refrigerated compartment and the arc-shaped profiles on both sides of the front end of the traction plate have a unique arc-shaped structure, which can effectively reduce the wind resistance on both sides of the front end of the semi-trailer, thereby avoiding the semi-trailer from running smoothly due to excessive wind resistance, and the use effect is good. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 It is a schematic diagram of the structure of the present invention.

[0043] Figure 2 It is a schematic diagram of the central connection structure of the present invention.

[0044] Figure 3 It is a schematic diagram of the side connection structure of the present invention.

[0045] Figure 4 It is a schematic diagram of the back-end connection structure of the present invention.

[0046] Figure 5 It is a schematic diagram of the rear connecting plate of the skeleton vehicle of the present invention being located on the skeleton vehicle beam.

[0047] Figure 6 It is a three-dimensional view of the traction disk of the present invention.

[0048] Figure 7 It is a schematic diagram of the position of the guide plate on the traction disc.

[0049] Figure 8 It is a side view of the traction disc.

[0050] Fig. 9 This is a schematic diagram of the second beam.

[0051] Fig.10 It is a schematic diagram of the connection between the second cross beam and the frame vehicle beam.

[0052] Fig.11 This is a schematic diagram of the skeleton car through beam.

[0053] Fig.12 This is a schematic diagram of the installation of the through-beam of the skeleton car.

[0054] Fig.13 yes Fig.12 Schematic diagram of point A.

[0055] Fig.14 It is a schematic diagram of the cross section of a large arc angle profile. DETAILED DESCRIPTION

[0056] In order to make the technical solution of the present invention clearer, the present invention is further described below in conjunction with the accompanying drawings. Any equivalent replacement of the technical features of the technical solution of the present invention and any solution derived by conventional reasoning shall fall within the protection scope of the present invention. The fixed connection, fixed setting, and fixed structure mentioned in this embodiment are all known technologies known to those skilled in the art such as flange connection, welding, screw connection, bolt and nut connection, and riveting.

[0057] As can be seen from the accompanying drawings, an integrated refrigerated semi-trailer includes a skeleton vehicle 1 and a refrigerated compartment 2. The skeleton vehicle 1 is provided with two skeleton vehicle beams 11, and a traction plate 3 is integrally provided on the skeleton vehicle 1; the traction plate 3 includes a mounting plate 31, and a traction pin 32 is fixedly provided at the bottom of the mounting plate 31; and also includes a plurality of load-bearing crossbeams 34, guide plates 35 and longitudinal reinforcing ribs 33 fixedly provided on the skeleton vehicle beam 11;

[0058] A connection structure is provided between the skeleton vehicle 1 and the refrigerated vehicle body 2, and the skeleton vehicle 1 and the refrigerated vehicle body 2 are mutually connected and fixed by the connection structure; the connection structure includes a central connection structure 41, a side connection structure 42 and a rear end connection structure 43;

[0059] It also includes a wind resistance reduction structure, which includes a large arc corner profile 61 arranged at the corners on both sides of the front of the refrigerated compartment 2 and an arc profile 62 on both sides of the front end of the traction plate 3. The large arc corner profile 61 is located above the arc profile 62, and the shape of the large arc corner profile 61 corresponds to that of the arc profile 62.

[0060] Furthermore, the central connection structure 41 includes a reinforcing rib 411 fixedly arranged inside the bottom plate of the car body 2, a skeleton car through-beam 412 fixedly arranged on the skeleton car beam 11, and a self-tapping screw 413. A round hole is arranged on the top of the skeleton car through-beam 412. The self-tapping screw 413 passes through the round hole on the top of the skeleton car through-beam 412 from bottom to top and is embedded in the reinforcing rib 411 on the car body 2, so as to realize the fixed connection between the skeleton car beam 11 and the car body 2.

[0061] The side connection structure 42 includes a bottom side beam 421 of the box body, end plates 422 and screws 423 arranged on both sides of the through beam 412 of the skeleton car, and a plurality of first holes 426 are arranged at the bottom of the bottom side beam 421; a plurality of second holes 425 are arranged on the end plate 422, and the number, shape, size and position of the first holes 426 correspond to the number, shape, size and position of the second holes 425, and the screws 423 pass through the first holes 426 from the outside to the inside in sequence and are connected and fixed with the second holes 425 in cooperation with the nuts 424, so as to realize the fixed connection between the bottom side beam 421 of the box body and the end plate 422;

[0062] The rear end connection structure 43 includes a plurality of nut blocks 431 embedded in the rear frame 5 of the carriage, a rear connection plate 432 of the skeleton vehicle and bolts 433; the rear connection plate 432 of the skeleton vehicle is an L-shaped plate structure, fixedly arranged at the end position on the frame beam 11 of the skeleton vehicle, and the rear connection plate 432 of the skeleton vehicle is located at the bottom position of the rear frame 5 of the carriage, and the shape and size of the rear connection plate 432 of the skeleton vehicle correspond to the shape and size of the rear frame 5 of the carriage, and one side of the bottom of the rear frame 5 of the carriage is fitted with the rear connection plate 432 of the skeleton vehicle; a plurality of connection holes 434 are provided on the rear connection plate 432 of the skeleton vehicle, and the size, shape and position of the connection holes 434 correspond to the size, shape and position of the nut blocks 431 embedded in the rear frame 5 of the carriage; the bolts 433 pass through the connection holes 434 and penetrate the rear frame 5 of the carriage, and cooperate with the nut blocks 431 inside the rear frame of the carriage to achieve fixed connection.

[0063] Furthermore, two grooves 4121 are symmetrically arranged on the top of the skeleton vehicle through-beam 412, so that the skeleton vehicle through-beam 412 is a W-shaped structure; a plurality of evenly distributed through holes are opened on the two skeleton vehicle beams 11, and the two grooves 4121 of the skeleton vehicle through-beam 412 respectively pass through the through holes corresponding to the two skeleton vehicle beams 11, and the through-beam at the groove 4121 is fixedly connected to the skeleton vehicle beam 11 by welding; so that the top of the skeleton vehicle through-beam 412 and the top of the skeleton vehicle beam 11 are located in the same horizontal plane; the two ends of the skeleton vehicle through-beam 412 are symmetrically arranged on both sides of the two skeleton vehicle beams 11;

[0064] An end plate 422 is symmetrically welded on both sides of the through beam 412 of the skeleton vehicle. The end plate 422 is a square structure. Four second holes 425 are arranged on the end plate 422. The four second holes 425 are evenly distributed at the four corners of the end plate 422. The end plate 422 is fixedly connected to the bottom side beam of the car body through the second holes 425 with bolts and nuts.

[0065] It also includes long end plates 4124, two of which are symmetrically welded to both sides of a plurality of frame car through-beams 412 in the middle of the frame car, and a plurality of long end plate holes 4125 are evenly distributed on the long end plates 4124. The long end plates 4124 are fixedly connected to the bottom side beams 421 of the car body through the long end plate holes 4125 in combination with bolts and nuts.

[0066] Further, the load-bearing crossbeam 34 includes a first crossbeam 341 and a second crossbeam 342. A plurality of the first crossbeams 341 are fixedly arranged on both sides of the frame vehicle beam 11 symmetrically, and the first crossbeams 341 are located on both sides of the mounting plate 31; a plurality of the second crossbeams 342 penetrate the two frame vehicle beams 11, and the second crossbeams 342 are located on the front and rear sides of the mounting plate 31; the first crossbeams 341 and the second crossbeams 342 are arranged in parallel;

[0067] The guide plate 35 is fixedly arranged at the bottom of the frame vehicle beam 11, and includes a first guide plate 351 and a second guide plate 352. The first guide plate 351 is fixedly arranged at the front end of the frame vehicle, and an upwardly bent edge 3511 is arranged at the front end of the first guide plate 351, and the edge 3511 is located at the outside of the front end beam 37 of the frame vehicle; the second guide plate 352 is located at one side of the first guide plate 351, and an arc-shaped notch 3521 is arranged at one side of the second guide plate 352;

[0068] There are multiple longitudinal reinforcing ribs 33 , which are fixedly disposed between multiple second cross beams 342 at the front end of the mounting plate 31 .

[0069] Furthermore, the cross section of the load-bearing beam 34 is a Z-shaped structure, and the first beam 341 and the second beam 342 are both welded to the frame vehicle beam 11 .

[0070] Furthermore, the number of the longitudinal reinforcement ribs 33 is 3 groups, which are respectively welded and fixed between the front end beam 37 of the skeleton vehicle and the second cross beam 342, between the two second cross beams 342, and between the second cross beam 342 and the mounting plate 31; the number of each group of longitudinal reinforcement ribs 33 is two, and each group of two longitudinal reinforcement ribs 33 are arranged opposite to each other. The longitudinal reinforcement ribs 33 are an inverted L-shaped structure, and a plurality of threading holes 331 are arranged on the longitudinal reinforcement ribs 33.

[0071] Furthermore, side beams 343 are fixedly provided on both sides of the first cross beam 341 and the second cross beam 342 . The side beams 343 are vertically welded to the first cross beam 341 and the second cross beam 342 . The cross section of the side beam 343 is a C-shaped structure. A plurality of side beam connecting holes 3431 are provided on the side beam 343 .

[0072] Furthermore, the second cross beam 342 is a W-shaped structure, and two recesses 3421 are arranged on the second cross beam 342. The cross section of the skeleton vehicle beam 11 is an I-shape. When the second cross beam 342 is connected to the skeleton vehicle beam 11 by through-welding, the top edge of the skeleton vehicle beam 11 is embedded in the recess 3421, so that the top surface of the skeleton vehicle is kept horizontal.

[0073] Furthermore, the mounting plate 31 is welded to the bottom beam 11 of the semi-trailer frame to form an integrated structure.

[0074] Furthermore, the thickness of the first guide plate 351 is slightly smaller than the thickness of the second guide plate 352 .

[0075] Furthermore, guide plate connecting holes 353 are provided on the first guide plate 351 and the second guide plate 352 .

[0076] Furthermore, the guide plate connecting hole 353 is one or more of a waist-shaped hole, a circular hole, an elliptical hole, a square hole, a trapezoidal hole, an L-shaped hole, and a regular hexagonal hole.

[0077] Furthermore, the end plate 422 is a square structure, and four second holes 425 are set on each end plate 422 , and the four second holes 425 are evenly distributed at the four corners of the end plate 422 .

[0078] Furthermore, the cross-section of the skeleton vehicle through-beam 412 is a Z-shaped structure or a C-shaped structure, and the skeleton vehicle through-beam 412 penetrates two skeleton vehicle beams 11 , with two ends of the skeleton vehicle through-beam 412 located on both sides of the two skeleton vehicle beams 11 .

[0079] Furthermore, the cross section of the reinforcing rib 411 is an I-shaped structure.

[0080] Furthermore, the rear connecting plate 432 of the skeleton vehicle is located between the two skeleton vehicle beams 11 .

[0081] Furthermore, the first hole 426 is a circular hole structure, the second hole 425 is a circular hole structure, and the connecting hole 434 is a waist-shaped hole structure.

[0082] The beneficial effects of the present invention are:

[0083] (1) A special connection structure is set up to carry out fixed connections of different structures at three different positions between the skeleton car and the carriage: the center, the side, and the rear end. This can make the skeleton car and the carriage an integrated whole to the greatest extent, making them difficult to separate and reliable in connection. The self-tapping screws are used to connect the crossbeam directly to the reinforcement ribs inside the carriage, which is not easy to produce gaps and has a good connection effect. The rear end and the side adopt a multi-point fixed connection method. Even if shaking occurs, the connection structure is not easy to be damaged due to the multi-point fixation, and has a long service life and good use effect.

[0084] (2) The unique integrated structure of the traction plate, the mounting plate is directly welded to the frame of the frame vehicle, and the welded load-bearing crossbeam makes the traction plate and the frame vehicle form a whole, with high bearing capacity and good use effect.

[0085] The traction plate has multiple load-bearing crossbeam structures to greatly improve its load-bearing capacity. The special W-shaped structure of the load-bearing crossbeam can ensure that the load-bearing surface of the crossbeam is flush with the load-bearing surface of the frame vehicle beam, thus forming a complete load-bearing surface, which can ensure good load-bearing and ensure that the load-bearing capacity of objects in the upper body is transferred to the frame vehicle crossbeam.

[0086] The structure of connecting the side beams on both sides of the load-bearing crossbeam, connecting multiple load-bearing crossbeams into a whole through the side beams, so that the traction disk forms a frame structure, which improves the strength of the traction disk as a part of the installation on the one hand, and improves the bearing capacity of the underframe as the upper part on the other hand. The side beams are used to adjust the welding deformation of the crossbeams to avoid poor precision caused by welding deformation of multiple crossbeams.

[0087] A plurality of longitudinal reinforcing ribs are arranged at the front end of the towing pin mounting plate, so that when the tractor tows the towing pin, the forward longitudinal traction force is distributed to a plurality of cross beams, thereby avoiding deformation, desoldering and even failure of the towing pin caused by long-term stress, thereby ensuring the service life of the towing pin.

[0088] A two-piece guide plate structure is set, and the front guide plate is set with a folding structure to protect the front beam of the skeleton car and avoid wear. The front guide plate is made of thin steel, which can protect the bottom of the traction plate while reducing weight; an arc-shaped notch is set at the center of the end of the rear guide plate to reduce weight. Due to national regulations, the total load-bearing mass (cargo weight plus deadweight) of the semi-trailer is 40 tons. Under the premise of ensuring safety, the lighter the deadweight of the semi-trailer, the greater the cargo capacity, which can effectively improve economic benefits.

[0089] (3) The through beam is located under the frame vehicle beam. With its unique W-shaped structure, the upper end surface of the through beam is flush with the upper plane of the frame vehicle beam, and the top surface of the frame vehicle is flat, which can ensure that there is no gap caused by uneven surface when the frame vehicle is connected to the body, avoiding the instability of the connection between the upper and lower parts of the semi-trailer.

[0090] The through beam adopts C-shaped or Z-shaped beam structure, which has high strength and strong bearing capacity. The through beam is pressed into W shape by special equipment, and the installation hole is opened at the corresponding position of the frame vehicle beam. The through beam passes through the installation hole on the beam and is welded with the beam to have high bearing capacity. Long end plates are welded to the through beam in the middle of the frame vehicle to connect the through beam into a whole, improve the overall strength, and avoid the frequent loading and unloading of goods and manual handling caused by insufficient bearing capacity, resulting in connection failure or damage to the frame vehicle beam.

[0091] (4) A special design for reducing wind resistance is adopted. The large arc-shaped corner profiles at the corners on both sides of the front of the refrigerated compartment and the arc-shaped profiles on both sides of the front end of the traction plate have a unique arc-shaped structure, which can effectively reduce the wind resistance on both sides of the front end of the semi-trailer, thereby avoiding the semi-trailer from running smoothly due to excessive wind resistance, and the use effect is good.

Claims

1. An integrated refrigerated semi-trailer, comprising a frame vehicle (1) and a refrigerated compartment (2), wherein the frame vehicle (1) is provided with two frame vehicle beams (11), characterized in that: The skeleton vehicle (1) is integrally provided with a traction disk (3); the traction disk (3) comprises a mounting plate (31), a traction pin (32) being fixedly provided at the bottom of the mounting plate (31); and further comprises a plurality of load-bearing cross beams (34), guide plates (35) and longitudinal reinforcing ribs (33) fixedly provided on the skeleton vehicle beam (11); A connection structure is provided between the skeleton vehicle (1) and the refrigerated vehicle body (2), and the skeleton vehicle (1) and the refrigerated vehicle body (2) are connected and fixed to each other via the connection structure; the connection structure comprises a central connection structure (41), a side connection structure (42) and a rear end connection structure (43); It also includes a wind resistance reduction structure, the wind resistance structure including large arc angle profiles (61) arranged at the corners on both sides of the front of the refrigerated compartment (2) and arc profiles (62) on both sides of the front end of the traction plate (3), the large arc angle profile (61) is located above the arc profile (62), and the large arc angle profile (61) corresponds to the shape of the arc profile (62); The central connection structure (41) comprises a reinforcing rib (411) fixedly arranged inside the bottom plate of the vehicle body (2), a frame vehicle through-beam (412) fixedly arranged on the frame vehicle beam (11), and a self-tapping screw (413), wherein a round hole is arranged on the top of the frame vehicle through-beam (412), and the self-tapping screw (413) passes through the round hole on the top of the frame vehicle through-beam (412) from bottom to top and is embedded in the reinforcing rib (411) on the vehicle body (2), thereby realizing a fixed connection between the frame vehicle beam (11) and the vehicle body (2); The side connection structure (42) includes a bottom side beam (421) of the car body, end plates (422) and screws (423) arranged on both sides of the through-beam (412) of the skeleton car, and a plurality of first holes (426) are arranged at the bottom of the bottom side beam (421); a plurality of second holes (425) are arranged on the end plate (422), and the number, shape, size and position of the first holes (426) correspond to the number, shape, size and position of the second holes (425), and the screws (423) pass through the first holes (426) from the outside to the inside in sequence and are connected and fixed with the second holes (425) in cooperation with nuts (424), thereby realizing a fixed connection between the bottom side beam (421) of the car body and the end plate (422); The rear end connection structure (43) comprises a plurality of nut blocks (431) pre-buried in the interior of the rear frame (5) of the carriage, a skeleton vehicle rear connection plate (432) and bolts (433); the skeleton vehicle rear connection plate (432) is an L-shaped plate structure, fixedly arranged at the end position on the skeleton vehicle beam (11), the skeleton vehicle rear connection plate (432) is located at the bottom position of the rear frame (5) of the carriage, and the shape and size of the skeleton vehicle rear connection plate (432) are relatively similar to the shape and size of the rear frame (5) of the carriage. The bottom side of the rear frame (5) of the carriage is fitted with the rear connecting plate (432) of the skeleton vehicle; a plurality of connecting holes (434) are provided on the rear connecting plate (432) of the skeleton vehicle, and the size, shape and position of the connecting holes (434) correspond to the size, shape and position of the nut blocks (431) embedded in the rear frame (5) of the carriage; the bolts (433) pass through the connecting holes (434) and penetrate the rear frame (5) of the carriage, and cooperate with the nut blocks (431) in the rear frame of the carriage to achieve fixed connection; The end plate (422) is a square structure, and four second holes (425) are arranged on each end plate (422), and the four second holes (425) are evenly distributed at the four corners of the end plate (422).

2. The integrated refrigerated semi-trailer according to claim 1, characterized in that: The top of the frame vehicle through-beam (412) is symmetrically provided with two grooves (4121), so that the frame vehicle through-beam (412) is a W-shaped structure; a plurality of evenly distributed through holes are provided on the two frame vehicle beams (11); the two grooves (4121) of the frame vehicle through-beam (412) respectively pass through the through holes corresponding to the two frame vehicle beams (11), and the through-beam at the grooves (4121) is fixedly connected to the frame vehicle beam (11) by welding; so that the top of the frame vehicle through-beam (412) and the top of the frame vehicle beam (11) are located in the same horizontal plane; the two ends of the frame vehicle through-beam (412) are symmetrically arranged on both sides of the two frame vehicle beams (11); An end plate (422) is symmetrically welded on both sides of the through-beam (412) of the skeleton vehicle. The end plate (422) is a square structure. Four second holes (425) are arranged on the end plate (422). The four second holes (425) are evenly distributed at the four corners of the end plate (422). The end plate (422) is fixedly connected to the bottom side beam of the car body through the second holes (425) in conjunction with bolts and nuts. It also includes a long end plate (4124), wherein the number of the long end plates (4124) is two, which are symmetrically welded to the two sides of a plurality of frame car through-beams (412) at the middle position of the frame car, and a plurality of long end plate holes (4125) are evenly distributed on the long end plate (4124). The long end plate (4124) is fixedly connected to the bottom side beam (421) of the car body through the long end plate holes (4125) in combination with bolts and nuts.

3. The integrated refrigerated semi-trailer according to claim 1, characterized in that: The load-bearing crossbeam (34) comprises a first crossbeam (341) and a second crossbeam (342); a plurality of the first crossbeams (341) are fixedly arranged on both sides of the frame vehicle beam (11) in a left-right symmetrical manner, and the first crossbeams (341) are located on both sides of the mounting plate (31); a plurality of the second crossbeams (342) penetrate the two frame vehicle beams (11), and the second crossbeams (342) are located on the front side and the rear side of the mounting plate (31); the first crossbeam (341) and the second crossbeam (342) are arranged in parallel; The guide plate (35) is fixedly arranged at the bottom of the frame vehicle beam (11), and comprises a first guide plate (351) and a second guide plate (352); the first guide plate (351) is fixedly arranged at the front end of the frame vehicle, and the front end of the first guide plate (351) is provided with an upwardly bent edge (3511), and the edge (3511) is located on the outside of the front end beam (37) of the frame vehicle; the second guide plate (352) is located on one side of the first guide plate (351), and one side of the second guide plate (352) is provided with an arc-shaped notch (3521); The longitudinal reinforcing ribs (33) are multiple in number and are fixedly arranged between the multiple second cross beams (342) at the front end of the mounting plate (31).

4. The integrated refrigerated semi-trailer according to claim 3, characterized in that: The cross section of the load-bearing crossbeam (34) is a Z-shaped structure, and the first crossbeam (341) and the second crossbeam (342) are both welded to the frame vehicle beam (11).

5. The integrated refrigerated semi-trailer according to claim 2, characterized in that: The longitudinal reinforcing ribs (33) are three groups in number, and are respectively welded and fixedly arranged between the front end beam (37) of the skeleton vehicle and the second cross beam (342), between the two second cross beams (342), and between the second cross beam (342) and the mounting plate (31); the number of each group of longitudinal reinforcing ribs (33) is two, and the two longitudinal reinforcing ribs (33) in each group are arranged opposite to each other. The longitudinal reinforcing ribs (33) are of an inverted L-shaped structure, and a plurality of threading holes (331) are arranged on the longitudinal reinforcing ribs (33).

6. The integrated refrigerated semi-trailer according to claim 3, characterized in that: Side beams (343) are fixedly arranged on both sides of the first cross beam (341) and the second cross beam (342); the side beam (343) is vertically welded to the first cross beam (341) and the second cross beam (342); the cross section of the side beam (343) is a C-shaped structure; and a plurality of side beam connection holes (3431) are arranged on the side beam (343).

7. The integrated refrigerated semi-trailer according to claim 3, characterized in that: The second cross beam (342) is a W-shaped structure. Two recesses (3421) are arranged on the second cross beam (342). The cross section of the frame vehicle beam (11) is an I-shaped cross section. When the second cross beam (342) is connected to the frame vehicle beam (11) by through-welding, the top edge of the frame vehicle beam (11) is embedded in the recess (3421), so that the top surface of the frame vehicle is kept horizontal.

8. The integrated refrigerated semi-trailer according to claim 1, characterized in that: The cross section of the skeleton vehicle through-beam (412) is a Z-shaped structure. The skeleton vehicle through-beam (412) penetrates two skeleton vehicle beams (11), and two ends of the skeleton vehicle through-beam (412) are located on both sides of the two skeleton vehicle beams (11).

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