Tank-type semitrailer and traction pin assembly

Abstract

The utility model provides a tank type semitrailer and a traction pin assembly. The traction pin assembly comprises a connecting seat, the connecting seat comprises two longitudinal beams and a plurality of saddles, the two longitudinal beams are arranged in parallel at intervals, the saddles are connected with the two longitudinal beams, the longitudinal beams extend in the longitudinal direction, and the saddles are arranged in the longitudinal direction at intervals and used for being fixedly connected with a tank body; the longitudinal beam and the saddle are made of aluminum alloy; the traction pin seat comprises a bottom plate, a traction pin and a reinforcing piece, the traction pin is fixed to the bottom of the bottom plate and downwards extends out of the bottom plate, and the traction pin seat is made of carbon steel; the traction pin seat is connected with the longitudinal beam through a fastener, and the reinforcing piece is connected to the top of the traction pin and fixedly connected with the bottom plate. The reinforcing piece is arranged at the joint of the traction pin and the bottom plate, so that the connecting strength is improved, the problem that deformation and cracking are prone to occurring due to the fact that the strength of the area is not enough is solved, the deformation and cracking phenomena are avoided, and the service life of the traction pin assembly is prolonged.

Description

Technical Field

[0001] The utility model relates to the field of semi-trailers, in particular to a tank-type semi-trailer and a draw pin assembly. Background Art

[0002] Aluminum alloys are increasingly used in transportation due to their low density and relatively light weight. Tank semi-trailers are also beginning to incorporate aluminum alloys extensively. The kingpin is a crucial component of a semi-trailer, providing the connection and load-bearing function between the tractor and the semi-trailer.

[0003] However, aluminum alloy has excellent toughness and ductility, but poor strength and rigidity, so the connection between the traction pin seat and the tank body, as well as the connection between the traction pin base plate and the traction pin are often prone to cracking and other problems. Utility Model Content

[0004] The purpose of the utility model is to provide a tank semi-trailer and a drawbar assembly to solve the technical problems in the prior art.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions: a traction pin assembly, comprising:

[0006] A connecting seat, comprising two longitudinal beams arranged in parallel and spaced apart from each other, and a plurality of saddles connecting the two longitudinal beams, wherein each longitudinal beam extends longitudinally, and the plurality of saddles are arranged longitudinally and spaced apart from each other, and each saddle is used for being fixedly connected to the tank body; the longitudinal beams and the saddles are both made of aluminum alloy;

[0007] A traction pin seat comprises a base plate, a traction pin and a reinforcement. The traction pin is fixed to the bottom of the base plate and extends downward from the base plate. The traction pin seat is made of carbon steel. The traction pin seat is connected to the longitudinal beam through fasteners. The reinforcement is connected to the top of the traction pin and fixedly connected to the base plate.

[0008] In one embodiment, a mounting hole is opened in the middle of the base plate, the reinforcement member includes cross-connected reinforcement beams, the reinforcement beams are fixed at the mounting hole, and the traction pin is fixed at the connection between the two reinforcement beams.

[0009] In one embodiment, the two reinforcing beams are perpendicular to each other;

[0010] The reinforcing beam is arranged obliquely relative to the longitudinal direction.

[0011] In one embodiment, a receiving groove with a downward opening is provided at the bottom of each reinforcing beam, and the receiving groove is arranged in the middle of the length direction of the reinforcing beam. The receiving grooves of the two reinforcing beams are connected and jointly form a receiving space, and the upper part of the traction pin is received in the receiving space.

[0012] In one embodiment, the traction pin seat includes a plurality of transverse reinforcement plates arranged in parallel and spaced apart, the transverse reinforcement plates extending in the transverse direction, the transverse reinforcement plates being fixed to the top of the base plate, and the ends of the reinforcement beam being fixedly connected to the transverse reinforcement plates adjacent to the mounting holes;

[0013] The traction pin seat includes longitudinal reinforcement plates arranged on opposite sides of the reinforcement beam, the longitudinal reinforcement plates extend longitudinally, and the longitudinal reinforcement plates are fixed at the mounting holes; the longitudinal reinforcement plates are connected to the transverse reinforcement plates adjacent to the mounting holes.

[0014] In one embodiment, a plurality of connection holes are formed on the longitudinal beam, the plurality of connection holes are spaced apart in the longitudinal direction, and the axis of each connection hole extends vertically;

[0015] A plurality of through holes are provided on opposite sides of the base plate, and the plurality of through holes are arranged at intervals along the longitudinal direction. Fasteners are simultaneously passed through the through holes and the connecting holes to realize the connection between the connecting seat and the traction pin seat.

[0016] In one embodiment, the longitudinal length of the bottom plate is smaller than the longitudinal length of the longitudinal beam, and the through holes on the bottom plate can correspond to the connecting holes at different positions on the longitudinal beam to adjust the position of the bottom plate on the longitudinal beam.

[0017] In one embodiment, the bottom plate includes a plate body and bent portions arranged on opposite sides of the plate body, the plate body extends horizontally, the bent portions extend upwardly beyond the plate body, the bent portions include a transition unit and a mounting unit, the transition unit is connected to the plate body, the mounting unit extends horizontally, and the through hole is formed on the mounting unit;

[0018] The bottom plate is provided with a water hole at the connection between the plate body and the bent portion;

[0019] A guide portion is provided at the front end of the plate body, and the guide portion is inclined downward from front to back.

[0020] In one embodiment, the connecting seat includes a plurality of first reinforcing plates, the two ends of the first reinforcing plates are respectively connected to the two longitudinal beams, and the first reinforcing plates are arranged corresponding to the saddle and located on the side of the saddle;

[0021] The connecting seat includes a plurality of second reinforcing plates, the second reinforcing plates are located on the outside of the longitudinal beam, the second reinforcing plates are arranged corresponding to the saddle, and the second reinforcing plates simultaneously connect the side surfaces of the saddle and the longitudinal beam.

[0022] In one embodiment, the connecting seat includes a front sealing plate connected to the front ends of the two longitudinal beams;

[0023] End sealing plates are provided at both ends of the saddle to close the openings at both ends of the saddle;

[0024] The longitudinal beam includes a wing plate and a side plate, the wing plate is arranged horizontally, and the side plate is arranged vertically.

[0025] The utility model also provides a tank semi-trailer, comprising a tank body and the above-mentioned traction pin assembly, wherein the tank body is made of aluminum alloy, the saddle is fixedly connected to the tank body to support the tank body, and the two longitudinal beams constitute the longitudinal beams of the subframe.

[0026] It can be seen from the above technical solution that the present invention has at least the following advantages and positive effects:

[0027] The new draft pin assembly includes a connecting base and a draft pin holder. The connecting base is made of aluminum alloy, while the draft pin holder is made of carbon steel, which increases the strength of the draft pin holder. A reinforcement member is provided at the connection between the draft pin and the base plate, increasing the connection strength and resolving the problem of insufficient strength in this area, which can easily lead to deformation and cracking. This prevents deformation and cracking, and extends the service life of the draft pin assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic front view of a partial structure of a mid-tank semi-trailer of the present invention.

[0029] Figure 2 It is a structural schematic diagram of the traction pin assembly in the utility model.

[0030] Figure 3 yes Figure 2 Schematic diagram of the structure from another perspective.

[0031] Figure 4 It is a structural schematic diagram of the connecting seat in the utility model.

[0032] Figure 5 yes Figure 4 Schematic diagram of the structure from another perspective.

[0033] Figure 6 It is a structural schematic diagram of the traction pin seat in the utility model.

[0034] Figure 7 yes Figure 6 Schematic diagram of the structure from another perspective.

[0035] Figure 8 yes Figure 7 A magnified schematic diagram of the local structure.

[0036] The following are the descriptions of the reference numerals:

[0037] 1. Drawbar assembly; 11. Connecting seat; 111. Longitudinal beam; 1111. Wing plate; 1112. Side plate; 112. Saddle; 113. End seal plate; 114. First reinforcement plate; 115. Second reinforcement plate; 116. Front seal plate; 12. Drawbar seat; 121. Bottom plate; 1211. Plate body; 1212. Bend portion; 1216. Transition unit; 1217. Mounting unit; 1218. Guide portion; 122. Drawbar; 123. Reinforcement beam; 124. Transverse reinforcement plate; 125. Longitudinal reinforcement plate;

[0038] 2. Tank body. DETAILED DESCRIPTION

[0039] Although the present invention can be easily embodied as embodiments of different forms, only some of the specific embodiments are shown in the drawings and will be described in detail in this specification. It should be understood that this description should be regarded as an exemplary illustration of the principles of the present invention and is not intended to limit the present invention to that described herein.

[0040] Thus, a feature indicated in this specification is intended to illustrate one of the features of one embodiment of the present invention, rather than implying that every embodiment of the present invention must have the described feature. Furthermore, it should be noted that this specification describes many features. Although certain features can be combined together to illustrate possible system designs, these features can also be used in other, not explicitly described, combinations. Thus, unless otherwise noted, the described combinations are not intended to be limiting.

[0041] In the embodiments shown in the accompanying drawings, directional indications (such as up, down, left, right, front, and back) used to explain the structure and movement of various components of the present invention are not absolute but relative. These descriptions are applicable when these components are in the positions shown in the accompanying drawings. If the descriptions of the positions of these components are changed, these directional indications will also change accordingly.

[0042] At present, the impact of vehicle vibration is usually alleviated by adding rubber shock absorbers with rubber plates to the traction pin seat structure to avoid cracking at the connection between the aluminum alloy subframe and the tank body. However, the rubber shock absorbers can easily reduce the lateral stiffness of the traction pin seat, which is not conducive to the vehicle's roll stability angle. The aging of rubber parts can also lead to problems such as failure of the traction pin seat support structure and loosening of bolts.

[0043] As the main structure connecting the tractor and the semi-trailer, the kingpin seat needs to bear various working conditions such as the weight of the tank and driving vibration, and the friction between the tractor saddle and the semi-trailer kingpin seat bottom plate when the vehicle turns. Due to the excellent toughness and ductility of aluminum alloy materials but relatively poor strength, rigidity and hardness, the kingpin seat bottom plate is often prone to deformation and abnormal wear.

[0044] Therefore, the utility model provides a reinforced kingpin assembly and a tank semi-trailer having the kingpin assembly.

[0045] For the convenience of description, the length direction of the tank semi-trailer is defined as the longitudinal direction and the width direction as the transverse direction.

[0046] Figure 1 Shows a partial structural diagram of a tank semi-trailer, see Figure 1 The tank semi-trailer includes a tank body and a traction pin assembly.

[0047] The tank is used to load materials, which can be powder or liquid.

[0048] The tank body is made of aluminum alloy, which is not only corrosion-resistant and can carry corrosive materials, but also reduces the net weight of the tank body, thereby reducing the net weight of the entire tank semi-trailer.

[0049] Figure 2 and Figure 3 Shows the structural diagram of the traction pin assembly from different perspectives, see Figure 2 and Figure 3 The traction pin assembly includes a connecting seat and a traction pin seat. The traction pin seat is made of carbon steel and the strength is further increased by reinforcements to ensure the strength of the traction pin seat.

[0050] Figure 4 and Figure 5 Shows a schematic diagram of the structure of the connector from different angles, see Figure 4 and Figure 5 The connecting seat includes two longitudinal beams arranged in parallel and spaced apart and a plurality of saddles connecting the two longitudinal beams.

[0051] Specifically, each longitudinal beam extends longitudinally. In this embodiment, the longitudinal beams constitute the longitudinal beams of the subframe of the tank semi-trailer. In other words, the longitudinal beams serve not only as part of the subframe but also as part of the kingpin assembly. This reduces the structural elements and, consequently, the net weight of the entire tank semi-trailer.

[0052] The longitudinal beams are symmetrically arranged on both sides of the longitudinal center plane of the tank semi-trailer.

[0053] The longitudinal beam is made of aluminum alloy.

[0054] The longitudinal beam consists of wing panels and side panels. The wing panels are arranged horizontally, while the side panels are arranged vertically. The longitudinal beam is L-shaped. The transition between the wing panels and the side panels is preferably rounded.

[0055] The wing plate is provided with a plurality of connection holes which are spaced apart in the longitudinal direction, and the axis of each connection hole extends in the vertical direction.

[0056] In this embodiment, the plurality of connection holes are arranged at equal distances. In other embodiments, the plurality of connection holes may also be arranged at unequal distances, depending on actual needs.

[0057] The side plate comprises an inclined surface which gradually slopes downward from the front to the rear and a horizontal surface located at the rear end of the inclined surface.

[0058] A plurality of saddles are arranged at intervals along the longitudinal direction. Each saddle is connected to two longitudinal beams and extends outwards from the longitudinal beams.

[0059] Each saddle is used to securely connect to the tank body. Specifically, the top of the saddle is curved to fit the outer circumference of the tank body. The saddle is made of aluminum alloy and is welded to the tank body.

[0060] End sealing plates are provided at both ends of the saddle to close the openings at both ends of the saddle, which not only strengthens the structure but also seals the saddle to prevent water from entering.

[0061] Continue reading Figure 4 and Figure 5 The connecting base includes a plurality of first reinforcing plates. The first reinforcing plates are connected to the two longitudinal beams at their respective ends. The first reinforcing plates are provided corresponding to the saddle and are located on the sides of the saddle. The tops of the first reinforcing plates are flush with or lower than the top of the portion of the saddle between the two longitudinal beams.

[0062] In this embodiment, the first reinforcing plate is provided on both opposite sides of each saddle. In other embodiments, the first reinforcing plate can be provided on only one side of the saddle.

[0063] The strength of the connecting seat is enhanced by disposing a plurality of first reinforcing plates.

[0064] The connecting base includes multiple second reinforcement plates. These second reinforcement plates are located outside the longitudinal beams, corresponding to the saddle, and connect both the side surfaces of the saddle and the longitudinal beams. The second reinforcement plates are located on the sides of the saddle outside the longitudinal beams. The tops of the second reinforcement plates are flush with or lower than the top of the saddle outside the longitudinal beams.

[0065] In this embodiment, the second reinforcing plates are provided on both opposite sides of each saddle. In other embodiments, the second reinforcing plates can be provided on only one side of the saddle.

[0066] The strength of the connecting seat is enhanced by disposing a plurality of second reinforcing plates.

[0067] The connector includes a front sealing plate, which is connected to the front ends of the two longitudinal beams. The top of the front sealing plate is flush with the top of the longitudinal beams or extends upwards beyond the longitudinal beams. The front sealing plate is used to seal and waterproof, reduce wind resistance, and also has an aesthetic effect.

[0068] The front sealing plate is made of aluminum alloy. The first reinforcing plate is made of aluminum alloy. The second reinforcing plate is made of aluminum alloy. The end sealing plate is made of aluminum alloy. In other words, the connecting base is made of aluminum alloy.

[0069] Figure 6 and Figure 7 Shows the structural diagram of the traction pin seat from different angles, see Figure 6 and Figure 7 The tow pin holder consists of a base plate, a tow pin, and a reinforcement. The tow pin holder is made of carbon steel to ensure its strength. The tow pin is fixed to the bottom of the base plate and extends downward from the base plate. The tow pin is used to connect to the towing vehicle. The reinforcement is connected to the top of the tow pin and fixed to the base plate, increasing the connection strength between the tow pin and the base plate.

[0070] The kingpin seat and longitudinal beam are connected via fasteners. Specifically, the aluminum alloy connecting seat and the carbon steel kingpin seat are connected via fasteners. Specifically, multiple through-holes are provided on opposing sides of the base plate, spaced longitudinally. Fasteners are inserted through both the through-holes and the connecting holes to connect the connecting seat and the kingpin seat.

[0071] Preferably, the longitudinal length of the base plate is smaller than the longitudinal length of the longitudinal beam. Therefore, the through holes on the base plate can correspond to the connecting holes at different positions on the longitudinal beam to adjust the position of the base plate on the longitudinal beam, that is, the traction pin seat is connected to different positions in the front and rear directions of the connecting seat, thereby realizing the adjustment of the front and rear positions of the traction pin seat, thereby enabling different tractors to better achieve compliant axle load distribution, thereby improving the compatibility of the tank semi-trailer with different tractors.

[0072] The base plate includes a main plate body and two bent portions located on opposite sides of the main plate body. The main plate body extends horizontally, and the bent portions extend upward beyond the main plate body. The bent portions include a transition unit and a mounting unit. The transition unit connects to the main plate body, and the mounting unit extends horizontally, with a through hole defined in the mounting unit.

[0073] Transition units extend outwards from both lateral sides of the plate body.

[0074] The bottom plate is provided with a water hole at the connection between the plate body and the bent portion for draining the water entering the traction pin assembly. Specifically in this embodiment, a semicircular notch is provided at the bottom of the bent portion, and the notch and the plate body together form the water hole.

[0075] In this embodiment, the bent portion further includes a plurality of longitudinally spaced reinforcing ribs. Each rib is disposed at the bottom of the mounting unit and on the outside of the transition unit, and is also connected to the top of the plate body. The ribs are disposed away from the through-holes in the mounting unit to expose the through-holes.

[0076] The front end of the base plate is provided with a guide portion that slopes downward from front to back. Specifically, the angle of inclination is 45°. Therefore, when the tank semi-trailer is connected to a tractor, the tractor moves backward along the guide portion until it reaches the towing pin, preventing the tractor from damaging the towing pin and the tank bottom.

[0077] A mounting hole is provided in the middle of the base plate, and a traction pin is disposed in the mounting hole. The mounting hole is specifically provided in the middle of the plate body. A reinforcement member is disposed in the mounting hole. In this embodiment, the mounting hole is a square hole.

[0078] The reinforcement member comprises cross-connected reinforcement beams, the reinforcement beams are fixed at the mounting holes, and the traction pin is fixed at the connection between the two reinforcement beams.

[0079] Specifically, the reinforcement beam is arranged obliquely relative to the longitudinal direction. The two reinforcement beams are perpendicular to each other.

[0080] The reinforcement adopts a solution of two reinforcement beams arranged at an inclination to the longitudinal direction, which has a more reasonable structure, takes into account the overall and all-directional forces, and ensures uniform force, thus avoiding deformation and cracking.

[0081] See Figure 8 Each reinforcement beam has a downward-opening receiving groove at its bottom, located midway along its length. The receiving grooves of the two reinforcement beams communicate with each other and together form a receiving space. The upper portion of the traction pin is received within the receiving space. This receiving space primarily accommodates the outwardly protruding portion of the upper portion of the traction pin.

[0082] The shape of the receiving groove is adapted to the shape of the top and upper portion of the traction pin. Specifically, in this embodiment, the top wall of the receiving groove is provided with a step to adapt the receiving space to the structure of the top of the traction pin. The step is formed by an inclined surface that slopes upward from the outside to the inside.

[0083] The traction pin seat includes a plurality of transverse reinforcement plates arranged in parallel and spaced apart. The transverse reinforcement plates extend in the transverse direction and are fixed to the top of the base plate. The ends of the reinforcement beams are fixedly connected to the transverse reinforcement plates adjacent to the mounting holes.

[0084] Specifically, the ends of the transverse reinforcement plates connect to the transition units of the base plate, and the bottoms of the transverse reinforcement plates abut the tops of the main plate bodies. Two transverse reinforcement plates are installed on either side of the mounting hole in the longitudinal direction. Transverse reinforcement plates are also installed at both ends of the mounting hole in the transverse direction. The reinforcement beam is positioned at a 45° angle to the transverse reinforcement plates. The two ends of the reinforcement beam are connected to the two transverse reinforcement plates on either side of the mounting hole in the longitudinal direction.

[0085] In this embodiment, the cross section of the transverse reinforcing plate is in an inverted U shape, that is, the opening faces the channel steel of the bottom plate.

[0086] By setting the transverse reinforcement plate, not only the strength of the traction pin seat is strengthened, but also the connection strength between the reinforcement and the base plate is increased, which better increases the strength of the traction pin and avoids deformation and cracking.

[0087] The traction pin seat includes longitudinal reinforcement plates arranged on opposite sides of the reinforcement beam. The longitudinal reinforcement plates extend longitudinally and are fixed to the mounting holes. The longitudinal reinforcement plates are connected to transverse reinforcement plates adjacent to the mounting holes.

[0088] Specifically, both ends of the longitudinal reinforcing plate are respectively connected to the two transverse reinforcing plates on both longitudinal sides of the mounting hole, and the outer side of the longitudinal reinforcing plate is connected to the transverse reinforcing plates at the transverse ends of the mounting hole.

[0089] The longitudinal reinforcement plate further increases the strength of the traction pin to avoid deformation and cracking.

[0090] In this embodiment, the cross section of the longitudinal reinforcing plate is in an inverted U-shape, that is, the opening faces the channel steel of the bottom plate.

[0091] In summary, the traction pin assembly has the following advantages:

[0092] 1. The connecting seat of the kingpin assembly is made of aluminum alloy, and the kingpin seat is made of strong carbon steel, which avoids the problem of easy deformation and abnormal wear of the kingpin seat. It also solves the problems in related technologies such as the use of rubber shock absorbers causing the lateral stiffness of the kingpin seat to deteriorate, which is not conducive to the vehicle's roll stability angle, and the aging of rubber parts causing the kingpin seat support structure to fail and the bolts to loosen.

[0093] 2. A reinforcement piece is provided at the connection between the traction pin and the base plate to increase the connection strength, solving the problem of insufficient strength in this area which is prone to deformation and cracking.

[0094] 3. The lateral reinforcement plate further increases the strength of the traction pin seat, which better prevents the traction pin seat from deformation and wear.

[0095] The local strength of the connection between the traction pin and the base plate is further increased by the transverse reinforcement plate and the longitudinal reinforcement plate, which better solves the problem of insufficient strength in this area, which is prone to deformation and cracking.

[0096] 4. The length of the longitudinal beam of the connecting seat is greater than the length of the bottom plate of the traction pin seat, so that the traction pin seat can be adjusted in the front and rear directions of the bottom of the connecting seat, thereby improving the compatibility of the tank semi-trailer and the tractor.

[0097] 5. A guide portion is provided at the front end of the bottom plate so that when the tank semi-trailer is connected to the tractor, the tractor moves backward along the guide portion until it reaches the traction pin, thereby avoiding the phenomenon that the tractor hits the traction pin and the bottom of the tank body.

[0098] 6. The longitudinal beam of the connecting seat adopts an L-shaped structure, and multiple saddles are set between the two longitudinal beams. Compared with the strip plate structure in the relevant technology, it is more reasonable and stronger, and solves the problems of easy deformation and cracking and lateral instability of the connecting seat.

[0099] The strength of the connection base is further enhanced by the first reinforcement plate. The strength of the connection base is further enhanced by the second reinforcement plate.

[0100] While the present invention has been described with reference to several exemplary embodiments, it should be understood that the terms used are illustrative and exemplary rather than restrictive. Since the present invention can be embodied in a variety of forms without departing from the spirit or essence of the invention, it should be understood that the above-described embodiments are not limited to any of the foregoing details, but should be interpreted broadly within the spirit and scope of the appended claims. Therefore, all changes and modifications that fall within the scope of the claims or their equivalents are intended to be covered by the appended claims.

Claims

1. A traction pin assembly, characterized in that: include: A connecting seat, comprising two longitudinal beams arranged in parallel and spaced apart from each other, and a plurality of saddles connecting the two longitudinal beams, wherein each longitudinal beam extends longitudinally, and the plurality of saddles are arranged longitudinally and spaced apart from each other, and each saddle is used for being fixedly connected to the tank body; the longitudinal beams and the saddles are both made of aluminum alloy; A traction pin seat comprises a base plate, a traction pin and a reinforcement. The traction pin is fixed to the bottom of the base plate and extends downward from the base plate. The traction pin seat is made of carbon steel. The traction pin seat is connected to the longitudinal beam through fasteners. The reinforcement is connected to the top of the traction pin and fixedly connected to the base plate.

2. The traction pin assembly according to claim 1, characterized in that: A mounting hole is provided in the middle of the base plate. The reinforcement member comprises cross-connected reinforcement beams. The reinforcement beams are fixed at the mounting hole, and the traction pin is fixed at the connection point of the two reinforcement beams.

3. The traction pin assembly according to claim 2, characterized in that: The two reinforcement beams are perpendicular to each other; The reinforcing beam is arranged obliquely relative to the longitudinal direction.

4. The traction pin assembly according to claim 2, characterized in that: The bottom of each reinforcing beam is provided with a receiving groove opening downward, and the receiving groove is arranged in the middle of the length direction of the reinforcing beam. The receiving grooves of the two reinforcing beams are connected and jointly form a receiving space, and the upper part of the traction pin is received in the receiving space.

5. The traction pin assembly according to claim 2, characterized in that: The traction pin seat includes a plurality of transverse reinforcement plates arranged in parallel and spaced apart, the transverse reinforcement plates extending in the transverse direction, the transverse reinforcement plates being fixed to the top of the base plate, and the ends of the reinforcement beam being fixedly connected to the transverse reinforcement plates adjacent to the mounting holes; The traction pin seat includes longitudinal reinforcement plates arranged on opposite sides of the reinforcement beam, the longitudinal reinforcement plates extend longitudinally, and the longitudinal reinforcement plates are fixed at the mounting holes; the longitudinal reinforcement plates are connected to the transverse reinforcement plates adjacent to the mounting holes.

6. The traction pin assembly according to claim 1, characterized in that: The longitudinal beam is provided with a plurality of connection holes, which are spaced apart in the longitudinal direction, and the axis of each connection hole extends vertically; A plurality of through holes are provided on opposite sides of the base plate, and the plurality of through holes are arranged at intervals along the longitudinal direction. Fasteners are simultaneously passed through the through holes and the connecting holes to realize the connection between the connecting seat and the traction pin seat.

7. The traction pin assembly according to claim 6, characterized in that: The longitudinal length of the bottom plate is smaller than that of the longitudinal beam, and the through holes on the bottom plate can correspond to the connecting holes at different positions on the longitudinal beam to adjust the position of the bottom plate on the longitudinal beam.

8. The traction pin assembly according to claim 6, characterized in that: The bottom plate includes a plate body and bent portions arranged on opposite sides of the plate body, the plate body extends horizontally, the bent portions extend upwardly beyond the plate body, the bent portions include a transition unit and a mounting unit, the transition unit is connected to the plate body, the mounting unit extends horizontally, and the through hole is opened on the mounting unit; The bottom plate is provided with a water hole at the connection between the plate body and the bent portion; A guide portion is provided at the front end of the plate body, and the guide portion is inclined downward from front to back.

9. The traction pin assembly according to claim 1, characterized in that: The connecting seat includes a plurality of first reinforcing plates, the two ends of the first reinforcing plates are respectively connected to the two longitudinal beams, and the first reinforcing plates are arranged corresponding to the saddle and located on the side of the saddle; The connecting seat includes a plurality of second reinforcing plates, the second reinforcing plates are located on the outside of the longitudinal beam, the second reinforcing plates are arranged corresponding to the saddle, and the second reinforcing plates simultaneously connect the side surfaces of the saddle and the longitudinal beam.

10. The traction pin assembly according to claim 1, characterized in that: The connecting seat includes a front sealing plate connected to the front ends of the two longitudinal beams; End sealing plates are provided at both ends of the saddle to close the openings at both ends of the saddle; The longitudinal beam includes a wing plate and a side plate, the wing plate is arranged horizontally, and the side plate is arranged vertically.

11. A tank semi-trailer, characterized in that: It comprises a tank body and a traction pin assembly according to any one of claims 1 to 10, wherein the tank body is made of aluminum alloy, the saddle is fixedly connected to the tank body to support the tank body, and the two longitudinal beams constitute the longitudinal beams of the subframe.

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