CN203902673U - Gantry bend structure and portal frame for vehicle - Google Patents

Abstract

The utility model provides a gantry bend structure and a portal frame for a vehicle. The gantry bend structure comprises a bend assembly, a supporting seat and a buffer connecting part, wherein the bend assembly and the supporting seat are flexibly connected through the buffer connecting part. Due to the fact that the bend assembly and the supporting seat are flexibly connected through the buffer connecting part, when frame deformation happens to the vehicle under the heavy load condition so that relative movement can happen to the bend assembly and the supporting seat, the buffer connecting part is subjected to compressional deformation to absorb deformation force, hence, the gantry bend structure has a certain adjustable deformation quantity, the connecting reliability of the bend assembly and the supporting seat is improved, fracture and fatigued damage of the gantry bend structure are effectively avoided, the service life of the gantry bend structure can be effectively prolonged, and thus the driving safety of the vehicle is guaranteed. Meanwhile, the gantry bend structure has the advantages of being simple in structure and low in manufacturing cost.

Description

Gantry bent pipe structure and portal frame for vehicle

Technical Field

The utility model relates to a vehicle equipment technical field, more specifically relates to a longmen return bend structure and portal frame that is used for the vehicle.

Background

With the development of the automobile industry, customers have made higher demands on the driving comfort of vehicles. The rear portal frame is used as a main mechanism for connecting the vehicle body and the vehicle frame, and can realize the functions of information transmission, locking, opening and the like on two sides of the rear end of the vehicle body.

The rear portal frame comprises a gantry bent pipe structure, and a bent pipe assembly of the gantry bent pipe structure is rigidly connected with the supporting seat. When the frame of the vehicle deforms under the heavy load condition, the gantry bent pipe structure is easily affected by the frame deformation, so that the problems that the gantry bent pipe structure is easy to break, is easy to fatigue and damage, has short service life and the like are caused, and the driving safety of the vehicle is seriously affected.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a longmen return bend structure and portal frame that is used for the vehicle to solve among the prior art longmen return bend structure easy fracture, easy tired impaired problem.

In order to solve the above technical problem, according to the utility model discloses an aspect provides a longmen bent pipe structure, include: a tube bending assembly; a supporting seat; buffering connecting portion, return bend subassembly pass through buffering connecting portion flexonics with the supporting seat.

Further, buffering connecting portion include the buffering portion, and the buffering portion includes elastic buffer, and elastic buffer sets up the junction at return bend subassembly and supporting seat.

Further, the buffer portion further includes: the first reinforcing piece is connected with the elastic buffer piece, arranged on one side of the elastic buffer piece close to the supporting seat and abutted against the supporting seat; and/or the second reinforcing piece, the elastic buffer piece is connected with the second reinforcing piece, and the second reinforcing piece is arranged on one side of the elastic buffer piece far away from the supporting seat.

Further, the buffering portion comprises a first reinforcing piece, the first reinforcing piece is a first sleeve, and the elastic buffering piece is arranged in the first sleeve.

Further, the buffering portion comprises a first reinforcing piece and a second reinforcing piece, the first reinforcing piece is a first sleeve, the second reinforcing piece is a second sleeve, the first sleeve is sleeved on the outer side of the second sleeve, and the elastic buffering piece is arranged between the inner side wall of the first sleeve and the outer side wall of the second sleeve.

Further, buffering connecting portion still includes the fastener, and the return bend subassembly passes through the fastener to be connected with buffering portion, and buffering portion has the hole of dodging that is used for supplying the fastener to pass, and the fastener is worn to establish in dodging the hole, and buffering portion and supporting seat butt.

Further, the elastomeric buffer is sleeve-shaped.

Furthermore, the connecting end of the elbow assembly is provided with a connecting space, and the side wall which encloses the connecting space is provided with a first connecting hole and a second connecting hole which are coaxially arranged; the connecting end of the supporting seat is arranged in the connecting space, the connecting end of the supporting seat is provided with a third connecting hole which is coaxial with the first connecting hole, the buffering part is arranged in the third connecting hole, and the outer side wall of the buffering part is abutted against the hole wall of the third connecting hole; the fastener passes first connecting hole, dodges hole and second connecting hole in proper order and connects buffer and supporting seat on the return bend subassembly.

Further, the length of the second sleeve is greater than the length of the first sleeve.

Furthermore, the connecting end of the elbow component is provided with a connecting space, the connecting end of the supporting seat is arranged in the connecting space, and the buffering part is positioned in the connecting end of the supporting seat, wherein the buffering connecting part also comprises a fastener which penetrates through the connecting end of the second sleeve and the elbow component to connect the second sleeve and the elbow component, and two ends of the second sleeve are respectively abutted against the side wall which is enclosed into the connecting space; or the two ends of the second sleeve are respectively embedded into the side walls which enclose the connecting space.

According to another aspect of the utility model, a portal frame for vehicle is provided, including the longmen bent pipe structure, the longmen bent pipe structure is foretell longmen bent pipe structure.

The utility model provides a return bend subassembly and supporting seat connection are through buffering connecting portion flexonics. Because the bent pipe assembly is connected with the supporting seat through the flexible connection of the buffer connecting part, when the vehicle is deformed under the heavy load condition and the bent pipe assembly and the supporting seat are caused to move relatively, the buffer connecting part is extruded and deformed and absorbs deformation force, so that the gantry bent pipe structure has certain adjustable deformation, the connection reliability of the bent pipe assembly and the supporting seat is improved, the gantry bent pipe structure is effectively prevented from being broken and damaged by fatigue, the service life of the gantry bent pipe structure can be effectively prolonged, and the driving installation performance of the vehicle is further ensured. And simultaneously, the utility model provides a gantry bending pipe structure has simple structure, low in manufacturing cost's characteristics.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification. In the drawings:

fig. 1 schematically shows a schematic structural view of a portal frame in the present invention;

fig. 2 schematically shows an exploded view of a gantry bent pipe structure in the present invention;

FIG. 3 schematically illustrates a front view of FIG. 2;

FIG. 4 schematically illustrates a view along A-A of FIG. 3;

FIG. 5 schematically illustrates a view along line B-B of FIG. 3;

FIG. 6 schematically illustrates a C-C view of the elbow assembly and support block of FIG. 3 in the absence of a deforming force;

FIG. 7 schematically illustrates a D-D view of the elbow assembly and support block of FIG. 3 in the absence of a deforming force;

FIG. 8 schematically illustrates a C-C view of the elbow assembly and support block of FIG. 3 under an X-direction deformation force;

FIG. 9 schematically illustrates a D-D view of the elbow assembly and support block of FIG. 3 under an X-direction deformation force;

FIG. 10 schematically illustrates a C-C view of the elbow assembly and support block of FIG. 3 under a Y-direction deformation force;

FIG. 11 schematically illustrates a D-D view of the elbow assembly and support block of FIG. 3 under a Y-direction deformation force;

FIG. 12 schematically illustrates a C-C view of the elbow assembly and support block of FIG. 3 under a Z-direction deformation force;

FIG. 13 schematically illustrates a D-D view of the elbow assembly and support block of FIG. 3 under a Z-direction deformation force;

FIG. 14 schematically illustrates a C-C view of the elbow assembly and support block of FIG. 3 under a buckling force;

FIG. 15 schematically illustrates a D-D view of the elbow assembly and support block of FIG. 3 under a buckling force; and

fig. 16 schematically shows a left side sectional view of fig. 15.

Reference numbers in the figures: 10. a tube bending assembly; 11. a first connecting plate; 12. a second connecting plate; 13. a third connecting plate; 13a, a second connecting hole; 14. a connection space; 15. a bent pipe body; 16. a bent pipe fixing support; 17. a reinforcing plate; 20. a supporting seat; 21. a third connection hole; 30. a buffer section; 31. an elastic buffer member; 32. a first reinforcement; 33. a second reinforcement; 34. a buffer space; 40. a fastener; 50. an oil pipe fixing clamp; 60. an auxiliary water tank bracket; 70. a column base; 80. a vehicle frame.

Detailed Description

The embodiments of the invention will be described in detail below with reference to the drawings, but the invention can be implemented in many different ways as defined and covered by the claims.

As a first aspect of the present invention, a bent gantry pipe structure is provided. As shown in fig. 1 to 16, the gantry bent pipe structure includes a bent pipe assembly 10, a support base 20 and a buffer connection portion, wherein the bent pipe assembly 10 is flexibly connected with the support base 20 through the buffer connection portion. Because the bent pipe assembly 10 is flexibly connected with the supporting seat 20 through the buffer connecting part, when the vehicle is deformed by the frame 80 under the heavy load condition and the bent pipe assembly 10 and the supporting seat 20 are caused to move relatively, the buffer connecting part is extruded and deformed and absorbs the deformation force, so that the gantry bent pipe structure has certain adjustable deformation, the connection reliability of the bent pipe assembly 10 and the supporting seat 20 is improved, the fracture and fatigue damage of the gantry bent pipe structure are effectively avoided, the service life of the gantry bent pipe structure can be effectively prolonged, and the driving installation performance of the vehicle is further ensured. And simultaneously, the utility model provides a gantry bending pipe structure has simple structure, low in manufacturing cost's characteristics.

The utility model provides a buffering connecting portion includes buffering portion 30, and buffering portion 30 includes elastomeric buffer 31, and elastomeric buffer 31 sets up in the junction of return bend subassembly 10 and supporting seat 20. Because elastic buffer 31 sets up the junction at return bend subassembly 10 and supporting seat 20, therefore can take place deformation when elastic buffer 31 receives return bend subassembly 10 or supporting seat 20's extrusion to make the junction of return bend subassembly 10 and supporting seat 20 have flexonics's characteristics, make return bend subassembly 10 have certain aversion space, effectively avoid the fatigue fracture of the two junction, and then guaranteed longmen elbow structure's use reliability.

Preferably, the elastic buffer 31 is a rubber buffer block. The rubber buffer block has the characteristics of extrusion resistance, abrasion resistance and the like, so that the use reliability of the buffer part 30 is ensured.

The utility model provides an elbow pipe assembly 10 includes the return bend body 15 and the return bend fixed bolster 16 of U type, and return bend fixed bolster 16 is two, and the both ends of return bend body 15 are connected with two return bend fixed bolsters 16 one-to-one, and return bend fixed bolster 16 is the link of return bend assembly 10 (please refer to fig. 1 to 3).

Preferably, the buffer connecting portion further includes a fastener 40, the elbow assembly 10 is connected to the buffer portion 30 through the fastener 40, the buffer portion 30 has an avoiding hole for the fastener 40 to pass through, the fastener 40 is inserted into the avoiding hole, and the buffer portion 30 abuts against the support seat 20.

Preferably, the connection end of the elbow assembly 10 has a connection space 14, and the sidewall enclosing the connection space 14 has a first connection hole and a second connection hole 13a coaxially disposed thereon; the connecting end of the supporting seat 20 is arranged in the connecting space 14, the connecting end of the supporting seat 20 is provided with a third connecting hole 21 which is coaxially arranged with the first connecting hole, the buffer part 30 is arranged in the third connecting hole 21, and the outer side wall of the buffer part 30 is abutted against the hole wall of the third connecting hole 21; the fastening member 40 sequentially passes through the first coupling hole, the relief hole and the second coupling hole 13a to couple the buffer 30 and the support base 20 to the elbow assembly 10. Preferably, the fastener 40 is a bolt and nut mating assembly.

In the preferred embodiment shown in fig. 1 to 3, the connection end of the elbow assembly 10 has a first connection plate 11, a second connection plate 12 and a third connection plate 13 connected in sequence, the first connection plate 11, the second connection plate 12 and the third connection plate 13 forming a connection space 14 therebetween, the first connection plate 11 having a first connection hole, the third connection plate 13 having a second connection hole 13a coaxially disposed with the first connection hole; the connection end of the support base 20 is positioned in the connection space 14, and the connection end of the support base 20 has a third connection hole 21 coaxially disposed with the first connection hole, and the buffer portion 30 is disposed in the third connection hole 21.

Preferably, the elbow fixing bracket 16 includes a reinforcing plate 17, and a circumferential edge of the reinforcing plate 17 is connected to the first connecting plate 11, the second connecting plate 12, and the third connecting plate 13 in sequence (see fig. 2). Because the reinforcing plate 17 is arranged on the elbow fixing support 16, the structural strength of the elbow fixing support 16 is improved, the elbow fixing support 16 is effectively prevented from being damaged by fatigue, and the use reliability of the elbow fixing support 16 is improved.

Preferably, the buffer portion 30 further includes: the first reinforcing element 32, the first reinforcing element 32 is connected with the elastic buffer 31, and the first reinforcing element 32 is arranged on one side of the elastic buffer 31 close to the supporting seat 20 and is abutted against the supporting seat 20; and/or a second reinforcing element 33, wherein the elastic buffer 31 is connected with the second reinforcing element 33, and the second reinforcing element 33 is arranged on the side of the elastic buffer 31 far away from the supporting seat 20. Due to the arrangement of the first reinforcing piece 32 and/or the second reinforcing piece 33, the structural strength of the buffer part 30 is effectively improved, so that the buffer part 30 still has the characteristic of high use reliability after being repeatedly used, and the service life of the buffer part 30 is prolonged. Preferably, the second reinforcement 33 is disposed spaced apart from the first reinforcement 32 and forms a buffering space 34, and the elastic buffer 31 is disposed in the buffering space 34.

As shown in fig. 6 to 16, the buffer portion 30 includes a first reinforcing member 32 and a second reinforcing member 33, the first reinforcing member 32 is a first sleeve, the second reinforcing member 33 is a second sleeve, the first sleeve is sleeved outside the second sleeve, and the elastic buffer 31 is disposed between an inner sidewall of the first sleeve and an outer sidewall of the second sleeve. Preferably, the outer side wall of the first sleeve abuts against the hole wall of the third connection hole 21.

Preferably, the elastic buffer 31 is sleeve-shaped, and the sleeve-shaped elastic buffer 31 is sandwiched between the first sleeve and the second sleeve.

Preferably, the length of the second sleeve is greater than the length of the first sleeve. Because the length of the second sleeve is greater than that of the first sleeve, when the support seat 20 receives a torsional force or a deformation force in the horizontal direction, the second sleeve of the buffering portion 30 will abut against the elbow fixing support 16 of the elbow assembly 10 before the first sleeve, so that the problem of excessive friction caused by excessive displacement of the buffering portion 30 during action is effectively avoided, and the connection reliability of the elbow assembly 10 and the support seat 20 is effectively ensured.

In the preferred embodiment shown in fig. 6 to 16, the second sleeve has a first avoiding hole for passing the fastening member 40, the first avoiding hole is the above-mentioned avoiding hole of the buffer portion 30, the fastening member 40 passes through the connecting end of the second sleeve and the elbow assembly 10 to connect the second sleeve and the elbow assembly 10, and both ends of the second sleeve are respectively abutted with the side walls enclosing the connecting space 14. Because the elastic buffer member 31 is abutted to the fastening member 40 through the second sleeve, and the elastic buffer member 31 is abutted to the supporting seat 20 through the first sleeve, while the overall structural strength of the buffering part 30 is improved, excessive friction of the fastening member 40 and/or the supporting seat 20 to the elastic buffer member 31 is effectively avoided, so that the buffering reliability of the elastic buffer member 31 is ensured, and the use reliability of the buffering part 30 is improved. In an embodiment, not shown, the two ends of the second sleeve may also be respectively embedded in the side walls enclosing the connection space 14.

In the preferred embodiment shown in fig. 6 to 16, the first end of the second sleeve abuts the first web 11 and the second end of the second sleeve abuts the third web 13. Because the first end of second sleeve and the butt of first connecting plate 11, the second end and the 13 butt of third connecting plate of second sleeve, therefore the second sleeve of buffer 30 plays certain supporting role to return bend fixed bolster 16, effectively avoids return bend fixed bolster 16 to be extruded and warp to improve return bend fixed bolster 16's reliability in utilization, still guaranteed buffer 30's buffer reliability simultaneously.

X, Y, Z in the utility model are oriented in three directions as shown in figure 1.

As shown in fig. 6 to 16, when the frame 80 deforms to deform the bent gantry pipe structure in X, Y, Z three directions and under twisting stress, the buffer part 30 can perform a buffering function and perform displacement deformation (the three directions are all limited by the reverse force generated by the buffer part 30 under compression deformation), so as to eliminate the deformation force, thereby ensuring the safety of the bent gantry pipe structure.

In an embodiment, not shown, the buffering portion 30 only includes the elastic buffering member 31, and the elastic buffering member 31 has a second avoiding hole for the fastening member 40 to pass through, and the fastening member 40 passes through the first connecting hole, the second avoiding hole and the second connecting hole 13a in sequence to connect the elbow assembly 10 and the supporting seat 20. Because the elbow assembly 10 is flexibly connected to the support base 20 via the cushion connection, when the elbow assembly 10 and the support base 20 move relative to each other, the deformation forces between the elbow assembly 10 and the support base 20 are transmitted through the fasteners 40 of the buffer connection, since the elastic buffer 31 is sleeved on the fastening member 40, when the elbow assembly 10 and the supporting seat 20 move relatively, the support base 20 first compresses the elastomeric bumper 31 and then causes the fastener 40 to compress the elbow assembly 10, thereby absorbing partial deformation force while deforming the elastic buffer member 31, effectively reducing the extrusion force transmitted to the elbow assembly 10 by the fastening member 40, ensuring a certain elastic deformation displacement space between the elbow assembly 10 and the supporting seat 20, thereby ensuring the connection reliability of the elbow assembly 10 and the support seat 20 and effectively avoiding the fracture of the joint of the elbow assembly and the support seat.

Preferably, the elastic buffer 31 and the supporting seat 20 are in interference fit. The elastic buffer member 31 is pressed into the support seat 20 by the press machine, so that the elastic buffer member 31 is effectively prevented from slipping off and being damaged.

In another embodiment, not shown, the buffer portion 30 includes only the first reinforcing member 32 and the elastic buffer member 31, the first reinforcing member 32 is a first sleeve, the elastic buffer member 31 is disposed in the first sleeve, and the outer side wall of the first sleeve abuts against the hole wall of the third connection hole 21. The elastic buffer 31 has a second avoiding hole for the fastening member 40 to pass through, the second avoiding hole is the above-mentioned avoiding hole of the buffer portion 30, and the fastening member 40 passes through the first connecting hole, the second avoiding hole and the second connecting hole 13a in sequence to fix the elbow assembly 10 and the support seat 20. Because the elastic buffer member 31 is arranged in the third connecting hole 21 of the supporting seat 20 through the first sleeve, the overall structural strength of the buffering part 30 is improved, and excessive friction of the third connecting hole 21 on the elastic buffer member 31 is effectively avoided, so that the buffering reliability of the elastic buffer member 31 is ensured, and the use reliability of the buffering part 30 is improved.

Preferably, the first sleeve is made of a wear resistant material. Further, the first sleeve is made of wear-resistant materials such as metal materials and hard plastics.

Preferably, each support seat 20 is provided with a plurality of third connecting holes 21, and each third connecting hole 21 is correspondingly provided with a buffer portion 30 therein. Because the elbow pipe component 10 is connected with the supporting seat 20 in a multi-point flexible connection mode, the connection reliability of the elbow pipe component and the supporting seat is guaranteed, meanwhile, the breakage of a gantry elbow pipe structure can be effectively prevented, and the gantry elbow pipe has the characteristic of high use reliability. As shown in fig. 1 to 3, each support seat 20 is provided with two third connection holes 21.

The gantry elbow structure of the present invention further includes an oil pipe fixing clamp 50, and the oil pipe fixing clamp 50 is fillet-welded to the elbow pipe body 15 or the elbow pipe fixing bracket 16 (refer to fig. 1 to 3). Preferably, the oil tube fixing clip 50 is plural. When the oil pipe fixing clamp 50 is vertically connected with the elbow pipe body 15 or the elbow pipe fixing support 16, the oil pipe fixing clamp and the elbow pipe body are fixed at the joint of the oil pipe fixing clamp and the elbow pipe fixing support by adopting a fillet welding mode, so that the oil pipe fixing clamp and the elbow pipe fixing support have the characteristic of simplicity and convenience in operation, and the connection reliability of the oil pipe fixing clamp and the elbow pipe fixing support can be effectively. Because the oil pipe fixing clamp 50 is arranged on the elbow pipe body 15 in a fillet welding mode, the elbow pipe fixing clamp has the characteristic of small welding damage area, and effectively reduces the influence of welding on the mechanical property and the metallographic structure of the elbow pipe body 15, thereby ensuring the overall structural strength of the gantry elbow pipe structure.

The gantry elbow structure of the utility model further comprises an auxiliary water tank support 60, wherein the auxiliary water tank support 60 is connected with the elbow pipe body 15 through submerged arc welding (please refer to fig. 5). It is preferable to use the long round hole of the sub-tank bracket 60 as a receiving space for the flux. Because the oblong hole of the auxiliary radiator support 60 is used as the accommodating space of the welding flux, the accommodating reliability of the welding flux is ensured, and when the electric arc burns under the welding flux layer and is welded, the welding flux can be ensured to weld the auxiliary radiator support 60 and the elbow body 15 together stably, so that the connection reliability of the auxiliary radiator support and the elbow body is ensured. Meanwhile, the auxiliary water tank bracket 60 is arranged on the elbow body 15 in a submerged arc welding mode, so that liquid slag generated by melting of welding flux can be ensured to cover electric arc and molten metal, the functions of protecting and purifying a molten pool and stabilizing the electric arc are achieved, and the electric arc and the molten metal are isolated from air by the slag, so that the welding stability is ensured, the stability of welding seam components is ensured, the influence of welding on the mechanical property and metallographic structure of the elbow body 15 is effectively reduced, and the overall structural strength of the gantry elbow structure is ensured.

Preferably, the elbow body 15 and the elbow fixing bracket 16 are connected by submerged arc welding.

The utility model provides a longmen return bend structure not only has the characteristics of difficult fracture, use the reliability high, can also satisfy the support requirement of external loads such as auxiliary water tank, oil tank.

As a second aspect of the present invention, a portal frame for a vehicle is provided. As shown in fig. 1 to 16, the gantry includes a gantry elbow structure, which is the gantry elbow structure described above. Preferably, the gantry further comprises a pillar base 70, and the frame 80 of the vehicle is connected with the gantry elbow structure through the pillar base 70. Because the utility model provides a longmen return bend structure has the characteristics of use reliability height, long service life, therefore has improved the operational reliability of portal frame to the maintenance rate of vehicle has been reduced, thereby has improved the whole quality of vehicle.

The utility model provides a longmen return bend structure still has simple, the whole cost of manufacture simple process, the whole is lower, the commonality is good, use the reliability high, can support the characteristics of external load.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (11)

1. A gantry elbow structure, comprising:

a bent tube assembly (10);

a support base (20);

the elbow assembly (10) is flexibly connected with the supporting seat (20) through the buffer connecting part.

2. The elbow structure according to claim 1, wherein the buffer connection portion comprises a buffer portion (30), the buffer portion (30) comprises an elastic buffer member (31), and the elastic buffer member (31) is disposed at a connection position of the elbow assembly (10) and the support base (20).

3. A gantry elbow structure according to claim 2, characterized in that the buffer (30) further comprises:

the first reinforcing piece (32), the first reinforcing piece (32) is connected with the elastic buffer piece (31), and the first reinforcing piece (32) is arranged on one side, close to the supporting seat (20), of the elastic buffer piece (31) and is abutted against the supporting seat (20); and/or

And the second reinforcing piece (33), the elastic buffer piece (31) is connected with the second reinforcing piece (33), and the second reinforcing piece (33) is arranged on the side, far away from the supporting seat (20), of the elastic buffer piece (31).

4. A gantry elbow structure according to claim 3, characterized in that the buffer (30) comprises the first reinforcement (32), the first reinforcement (32) being a first sleeve, the elastic buffer (31) being arranged inside the first sleeve.

5. A gantry bent pipe structure according to claim 3, characterized in that the buffer part (30) comprises the first reinforcement (32) and the second reinforcement (33), the first reinforcement (32) is a first sleeve, the second reinforcement (33) is a second sleeve, the first sleeve is sleeved outside the second sleeve, and the elastic buffer (31) is arranged between the inner side wall of the first sleeve and the outer side wall of the second sleeve.

6. A gantry bent pipe structure according to any one of claims 2 to 5, characterized in that the buffer connection part further comprises a fastener (40), the bent pipe assembly (10) is connected with the buffer part (30) through the fastener (40), the buffer part (30) is provided with an avoiding hole for the fastener (40) to pass through, the fastener (40) is arranged in the avoiding hole in a penetrating manner, and the buffer part (30) is abutted against the support base (20).

7. A gantry elbow structure according to any one of claims 2-5, characterized in that the elastomeric buffers (31) are sleeve-shaped.

8. The dragon door elbow structure according to claim 6, wherein the connecting end of the elbow assembly (10) is provided with a connecting space (14), and the side wall enclosing the connecting space (14) is provided with a first connecting hole and a second connecting hole (13a) which are coaxially arranged; the connecting end of the supporting seat (20) is arranged in the connecting space (14), the connecting end of the supporting seat (20) is provided with a third connecting hole (21) which is coaxial with the first connecting hole, the buffer part (30) is arranged in the third connecting hole (21), and the outer side wall of the buffer part (30) is abutted to the hole wall of the third connecting hole (21); fastener (40) pass in proper order first connecting hole dodge the hole with second connecting hole (13a) will buffer portion (30) with supporting seat (20) connect in on return bend subassembly (10).

9. A gantry elbow structure according to claim 5, wherein the length of the second sleeve is greater than the length of the first sleeve.

10. A gantry elbow structure according to claim 9, characterized in that the connection end of the elbow assembly (10) has a connection space (14), the connection end of the support base (20) is disposed in the connection space (14), the buffer portion (30) is located in the connection end of the support base (20), wherein,

the buffer connecting part also comprises a fastener (40) which penetrates through the connecting end of the second sleeve and the elbow pipe assembly (10) to connect the second sleeve and the elbow pipe assembly (10), and two ends of the second sleeve are respectively abutted with the side wall which is enclosed into the connecting space (14); or,

two ends of the second sleeve are respectively embedded into the side wall which is enclosed to form the connecting space (14).

11. A gantry for a vehicle comprising a gantry elbow structure, characterized in that the gantry elbow structure is a gantry elbow structure according to any one of claims 1 to 10.