CN116160808A - Trailer connection structure - Google Patents

Abstract

The application discloses trailer connection structure includes: mount pad, link assembly and traction assembly, wherein, the mount pad includes: an upper base and a lower base; a connecting rod assembly, comprising: the device comprises a reinforcing base, a connecting table, a supporting vertical rod and a reinforcing rod, wherein the reinforcing base is connected with the outer wall of the rear part of the upper base; one end of the connecting table is connected with the outer wall of the rear part of the mounting seat; one end of the supporting vertical rod is connected with the reinforcing base station; one end of the reinforcing rod is connected with the inner wall of the rear part of the reinforcing base, and the other end of the reinforcing rod is connected with the upper part of the traction assembly; a traction assembly comprising: the supporting platform assembly and the traction seat structure are connected with the connecting rod assembly; the traction seat structure is connected with the inner wall of one end of the supporting table component. From this, can provide sufficient intensity for this trailer connection structure through link assembly's enhancement base, connection platform, support montant and stiffener, and should pull the subassembly, can provide sufficient buffering effect, and then improved customer's use experience.

Description

Trailer connection structure

Technical Field

The application relates to the technical field of vehicles, in particular to a trailer connection structure.

Background

Trailer trailers can only be used with tractors or other vehicles to form a complete vehicle. The total weight of the trailer is borne by the trailer itself and is called a full trailer, and the full trailer is also called a trailer for short in general. The vehicle trailer is a powerless road vehicle which can be normally used only by being pulled by a car according to the design and technical characteristics of the vehicle trailer which is not powered and independently carried and runs by virtue of the traction of other vehicles, and is used for carrying personnel or goods and special purposes.

At present, the existing connector for the trailer is connected with a tractor through a hard connecting structure, and a large impact force exists between the trailer and the connector in the braking process of the tractor, so that the connector is easy to damage, the service life of the connector is greatly shortened, the strength of the connector is reduced after long-term use, and the safety of a vehicle is influenced.

Disclosure of Invention

The present application aims to solve, at least to some extent, one of the technical problems in the art described above.

Therefore, an object of the present application is to provide a trailer connection structure, can provide sufficient intensity for this trailer connection structure through link assembly's reinforcement base, connection platform, support montant and stiffener, and this traction assembly can provide sufficient buffering effect, has guaranteed the security when pulling the trailer and has pulled the vehicle.

To achieve the above object, a first aspect of the present application proposes a trailer connection structure, comprising: mounting assembly, link assembly and traction assembly.

Wherein the mounting assembly comprises: mounting seat, wherein, the mounting seat includes: an upper base and a lower base; the connecting rod assembly includes: the device comprises a reinforcing base, a connecting table, a supporting vertical rod and a reinforcing rod, wherein the reinforcing base is connected with the outer wall of the rear part of the upper base; one end of the connecting table is connected with the outer wall of the rear part of the mounting seat; one end of the supporting vertical rod is connected with the reinforcing base station, the other end of the supporting vertical rod is connected with the traction assembly, and the supporting vertical rod is used for reinforcing the supporting work of the base station; one end of the reinforcing rod is connected with the inner wall of the rear part of the reinforcing base, the other end of the reinforcing rod is connected with the upper part of the traction assembly, and the reinforcing rod is used for reinforcing the connecting rod assembly; the traction assembly includes: the supporting table assembly is connected with the connecting rod assembly and used for supporting the traction seat structure; the traction seat structure is connected with the inner wall of one end of the supporting table assembly and is used for connecting with a vehicle to be towed so as to tow the vehicle to be towed.

The utility model provides a trailer connection structure can provide sufficient intensity for this trailer connection structure through link assembly's reinforcing abutment, connection platform, support montant and stiffener, and this traction assembly can provide sufficient buffering effect, has improved the security when pulling the trailer.

In addition, the trailer connection structure proposed in the above description according to the present application may further have the following additional technical features:

in one embodiment of the present application, the connecting rod assembly further comprises: the first supporting table is connected with the outer wall of one end of the connecting table, and the first supporting table is connected with the inner wall of the supporting table assembly; the second supporting table is connected with the outer wall below the connecting table, and the second supporting table is connected with the inner wall of the supporting table assembly.

In one embodiment of the present application, the reinforcement matrix includes: the base station comprises a base station main body, a rear rib plate and side rib plates.

One end of the base main body is connected with the rear outer wall of the upper base; the rear rib plate is connected with the rear outer wall of the base main body; the side rib plate is connected with the side inner wall of the base body.

In one embodiment of the present application, the reinforcing bar includes: the upper rod is connected with the inner side wall of the rear rib plate; the rubber column is connected with the outer wall of the lower side of the upper rod and used for reinforcing the shock absorption supporting work of the rod; the lower rod is connected with the outer wall of the lower side of the rubber column; one side of the rubber gasket is connected with the lower rod, and the other side of the rubber gasket is connected with the supporting table assembly and used for avoiding rigid friction between the reinforcing rod and the supporting table assembly.

In one embodiment of the present application, the support table assembly includes: the support platform comprises a support platform main body, a connecting platform, a cover plate and a mounting groove, wherein the support platform main body is connected with the outer side wall of the connecting rod assembly; one end of the connecting table is connected with the outer wall of the supporting table main body, and the other end of the connecting table is connected with the lower side of the reinforcing rod; the cover plate is connected with the upper side of the supporting table main body; the mounting groove is formed in the inner side wall of the supporting table main body.

In one embodiment of the present application, the fifth wheel structure comprises: the hydraulic locking device comprises a mounting table, a spring structure, a gas spring structure, a hydraulic locking structure, a buffer spring, a traction structure, a supporting structure and a limiting structure.

Wherein the mounting table is connected with the inner wall of the mounting groove; the spring structure is connected with the inner side outer wall of the mounting table; the gas spring structure is connected with the outer wall of the front end of the mounting table; the hydraulic locking structure is connected with the top outer wall of the mounting table; one end of the buffer spring is connected with the outer side wall of the mounting table, and the other end of the buffer spring is connected with the outer side wall of the traction structure; the traction structure is connected with the outer wall of one end of the buffer spring; the supporting structure is connected with the inner bottom of the traction structure; the limiting structure is connected with the mounting table and the outer side wall of the traction structure.

After adopting above-mentioned technical scheme, this application compares the advantage that has with prior art and is: the connecting rod assembly can provide enough strength for the trailer connecting structure through the reinforcing base, the connecting table, the supporting vertical rods and the reinforcing rods of the connecting rod assembly, and the traction assembly can provide enough buffering effect, so that the safety of the trailer during traction is improved.

Additional aspects and advantages of the application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the application.

Drawings

The foregoing and/or additional aspects and advantages of the present application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings, in which:

FIG. 1 is a schematic structural view of a trailer connection according to one embodiment of the present application;

FIG. 2 is a front view of a trailer connection according to one embodiment of the present application;

FIG. 3 is a side view of a trailer connection according to one embodiment of the present application;

FIG. 4 is a top view of a trailer connection according to one embodiment of the present application;

FIG. 5 is a block diagram of a connecting rod assembly according to one embodiment of the present application;

FIG. 6 is a block diagram of a traction assembly according to one embodiment of the present application;

FIG. 7 is a cross-sectional view of a trailer connection according to one embodiment of the present application;

fig. 8 is a cross-sectional view of a trailer connection according to another embodiment of the present application.

As shown in the figure: 1. a mounting base; 2. reinforcing the base; 3. a connection station; 4. a first support table; 5. a second support table; 6. a supporting vertical rod; 7. a reinforcing rod; 8. a support table assembly; 9. a fifth wheel structure; 10. an upper base; 11. a lower base; 20. a base body; 21. a rear rib plate; 22. side rib plates; 70. a pole is arranged; 71. a rubber column; 72. a lower rod; 73. a rubber gasket; 80. a support table main body; 81. a connecting boss; 82. a cover plate; 83. a mounting groove; 90. a mounting table; 91. a spring structure; 92. a gas spring structure; 93. a hydraulic locking structure; 94. a buffer spring; 95. a traction structure; 96. a support structure; 97. and a limiting structure.

Detailed Description

Embodiments of the present application are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and intended for the purpose of explaining the present application and are not to be construed as limiting the present application. On the contrary, the embodiments of the present application include all alternatives, modifications, and equivalents as may be included within the spirit and scope of the appended claims.

The following describes a trailer connection structure of an embodiment of the present application with reference to the accompanying drawings.

The trailer connection structure of the embodiment of the application is mainly applied to heavy truck factories, special automobile factories and the like.

Fig. 1 is a schematic structural view of a trailer connection according to one embodiment of the present application, and fig. 7 is a cross-sectional view of the trailer connection according to one embodiment of the present application.

As shown in fig. 1 and 7, the trailer connection structure according to the embodiment of the present application may include: mounting assembly, link assembly and traction assembly.

Wherein, the installation component includes: mount 1, wherein mount 1 includes: an upper base 10 and a lower base 11; a connecting rod assembly, comprising: the device comprises a reinforcing base 2, a connecting table 3, a supporting vertical rod 6 and a reinforcing rod 7, wherein the reinforcing base 2 is connected with the rear outer wall of an upper base 10; one end of the connecting table 3 is connected with the outer wall of the rear part of the mounting seat 1; one end of the supporting vertical rod 6 is connected with the reinforcing base table 2, the other end of the supporting vertical rod 6 is connected with the traction assembly, and the supporting vertical rod 6 is used for reinforcing the supporting work of the base table 2; one end of the reinforcing rod 7 is connected with the inner wall of the rear part of the reinforcing base 2, the other end of the reinforcing rod 7 is connected with the upper part of the traction assembly, and the reinforcing rod 7 is used for reinforcing the connecting rod assembly.

Further, a traction assembly comprising: the supporting table assembly 8 and the traction seat structure 9, wherein the supporting table assembly 8 is connected with the connecting rod assembly and is used for supporting the traction seat structure 9; the traction seat structure 9 is connected with the inner wall of one end of the supporting table assembly 8, and the traction seat structure 9 is used for connecting with a vehicle to be towed so as to tow the vehicle to be towed.

In one embodiment of the present application, the connecting rod assembly further comprises: a first supporting table 4 and a second supporting table 5, wherein the first supporting table 4 is connected with the outer wall of one end of the connecting table 3, and the first supporting table 4 is connected with the inner wall of the supporting table assembly 8; the second supporting table 5 is connected with the lower outer wall of the connecting table 3, and the second supporting table 5 is connected with the inner wall of the supporting table component 8

Specifically, when the trailer connection structure is used, a person (for example, a worker) can connect the upper base 10 and the lower base 11 of the trailer connection structure mounting base 1 with the vehicle girder, can perform the supporting work of the reinforcing rod 7 through the reinforcing base 2 connected with the rear outer wall of the upper base 10, can perform the supporting work of the upper base 10 and the lower base 11 through the connecting table 3 connected with the rear outer wall of the mounting base 1 at one end, can connect with the reinforcing base 2 at one end, can support the vertical rod 6 connected with the traction assembly at the other end, can install the traction assembly below the connecting rod assembly, can perform the installation work of the traction assembly at one end, can connect with the rear inner wall of the reinforcing base 2 at the other end and the reinforcing rod 7 connected with the upper part of the traction assembly, and can perform the reinforcement of the connecting rod assembly.

Further, when the trailer connection structure is used for carrying out pulling work, related personnel can carry out supporting work of the traction seat structure 9 through the supporting table assembly 8 connected with the connecting rod assembly, and can carry out pulling work of the vehicle to be pulled through the traction seat structure 9 connected with the inner wall of one end of the supporting table assembly 8.

Further, when the traction seat structure 9 is used, the traction rod of the vehicle to be towed is placed in the traction structure 95, the traction rod is installed on the outer wall of the supporting structure 96, the traction rod is locked in the traction structure 95 through the hydraulic locking structure 93 connected with the outer wall of the top of the installation table 90, the traction work of the vehicle to be towed can be completed, when the traction vehicle is braked, the impact force generated by the traction vehicle is transmitted to the traction structure 95, after the traction structure 95 receives the impact force, the impact force is transmitted to the spring structure 91, the gas spring structure 92 and the buffer spring 94 of the traction seat structure 9, and then the impact force is uniformly distributed on the main body of the trailer connecting structure, so that the buffer work of the trailer connecting structure can be completed.

In one embodiment of the present application, as shown in fig. 1-8, a reinforcing base station 2, comprises: a base main body 20, a rear rib 21, and a side rib 22.

Wherein one end of the base body 20 is connected to the rear outer wall of the upper base 10; the rear rib 21 is connected to the rear outer wall of the abutment main body 20; the side rib 22 is connected to the side inner wall of the abutment body 20.

Specifically, when using the reinforcing abutment 2, the person concerned can mount one end of the reinforcing abutment 2 on the rear outer wall of the upper base 10, mount one end of the reinforcing rod 7 in the rear rib 21 connected to the rear outer wall of the abutment main body 20, and mount one end of the support post 6 on the side rib 22 connected to the side inner wall of the abutment main body 20, thereby completing the mounting work of the reinforcing abutment 2.

Referring to fig. 1-8, in one embodiment of the present application, the reinforcing bar 7 includes: an upper rod 70, a rubber column 71, a lower rod 72 and a rubber gasket 73.

Further, the upper rod 70 is connected to the inner side wall of the rear rib 21; the rubber column 71 is connected with the outer wall of the lower side of the upper rod 70 and is used for reinforcing the shock absorption supporting work of the rod 7; the lower rod 72 is connected with the lower outer wall of the rubber column 71; one side of the rubber gasket 73 is connected to the lower rod 72, and the other side of the rubber gasket 73 is connected to the support table assembly 8 for avoiding rigid friction between the reinforcing rod 7 and the support table assembly 8.

Specifically, when the reinforcing rod 7 is used, the related personnel can perform the supporting work of the rubber column 71 through the upper rod 70 connected with the inner side wall of the rear rib plate 21, the rubber column 71 connected with the outer wall of the lower side of the upper rod 70 can perform the cushioning supporting work of the upper rod 70, the lower rod 72 connected with the outer wall of the lower side of the rubber column 71 can perform the supporting work of the rubber column 71, one side of the lower rod 72 is connected with the lower rod 72, and the rubber gasket 73 connected with the supporting table assembly 8 at the other side of the lower rod 72 can avoid the rigid friction between the reinforcing rod 7 and the supporting table assembly 8, so that the cushioning is provided for the trailer connecting structure.

In one embodiment of the present application, as shown in fig. 1-8, a support table assembly 8, comprises: a support table body 80, a connection boss 81, a cover plate 82, and a mounting groove 83.

Further, the support table body 80 is connected to the link assembly outer side wall; one end of the connecting boss 81 is connected with the outer wall of the supporting table main body 80, and the other end of the connecting boss 81 is connected with the lower side of the reinforcing rod 7; the cover plate 82 is connected to the upper side of the support table main 80; the mounting groove 83 is formed in the inner wall of the support table main 80.

Specifically, when using this brace table subassembly 8, relevant personnel accessible one end links to each other with brace table main part 80 outer wall, and the other end links to each other with the connection boss that stiffener 7 downside links to each other, carries out the support work of brace table main part 80, and accessible is with the apron 82 that brace table main part 80 upside links to each other, carries out the work of placing of traction seat structure 9, and accessible is offered at the mounting groove 83 of brace table main part 80 inside wall, carries out the direction slip work of traction seat structure 9, alright accomplish the work of using of brace table subassembly 8.

Referring to fig. 1-8, in one embodiment of the present application, a fifth wheel structure 9 comprises: mount 90, spring structure 91, gas spring structure 92, hydraulic lock structure 93, buffer spring 94, traction structure 95, support structure 96, and limit structure 97.

Further, the mounting table 90 is connected to the inner wall of the mounting groove 83; the spring structure 91 is connected with the inner and outer walls of the mounting table 90; the gas spring structure 92 is connected with the front end outer wall of the mounting table 90; the hydraulic locking structure 93 is connected with the top outer wall of the mounting table 90; one end of the buffer spring 94 is connected with the outer side wall of the mounting table 90, and the other end of the buffer spring 94 is connected with the outer side wall of the traction structure 95; the traction structure 95 is connected with the outer wall of one end of the buffer spring 94; the support structure 96 is connected to the inside bottom of the traction structure 95; the spacing structure 97 is connected to the outer sidewalls of the mounting table 90 and the traction structure 95.

In particular, when the fifth wheel structure 9 is used, the relevant person can operate a remote control device (not specifically identified in the figures) to issue an unlocking command.

After receiving the instruction, the controller (not specifically identified in the figure) controls the hydraulic locking structure 93 connected with the top outer wall of the mounting table 90 to be opened, and after the hydraulic locking structure 93 is unlocked, one end of the traction rod of the vehicle to be towed is inserted into the traction structure 95, and the traction rod of the vehicle to be towed is sleeved on the support structure 96 connected with the inner bottom of the traction structure 95.

The remote control device is operated to send out a locking instruction, and after receiving the instruction, the controller controls the hydraulic locking structure 93 connected with the outer wall of the top of the mounting table 90 to be locked, so that the mounting work of the traction rod of the vehicle to be towed can be completed.

Further, when the vehicle to be towed is braked, the related personnel can provide a cushioning effect for the mounting table 90 through the spring structure 91 connected with the inner side outer wall of the mounting table 90, the related personnel can provide a cushioning effect for the front end of the mounting table 90 through the air spring structure 92 connected with the outer wall of the front end of the mounting table 90, the related personnel can be connected with the outer side wall of the mounting table 90 through one end, the other end of the cushioning spring 94 is connected with the outer side wall of the traction structure 95, the cushioning effect is achieved when the vehicle to be towed encounters a bumpy road section, and meanwhile, the limiting effect of the vehicle to be towed is achieved through the limiting structure 97 connected with the outer side walls of the mounting table 90 and the traction structure 95, so that the cushioning effect of the vehicle to be towed can be achieved.

In sum, the trailer connection structure of this application embodiment can be applied in heavy truck mill and special automobile factory etc. can provide sufficient intensity for this trailer connection structure through link assembly's enhancement base, connection board, support montant and stiffener, and this traction assembly can provide sufficient buffering effect, has improved the security when pulling of trailer.

In the description of the present application, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," etc. indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, are merely for convenience in describing the present application and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be configured and operated in a particular orientation, and therefore should not be construed as limiting the present application.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present application, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

In this application, unless explicitly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, e.g., as being fixedly connected, as being detachably connected, as being integral, as being mechanically connected, as being electrically connected, as being directly connected, as being indirectly connected through an intervening medium, as being an internal communication between two elements or as being an interaction between two elements. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art as the case may be.

In this application, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms must be directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

Although embodiments of the present application have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the application, and that variations, modifications, alternatives, and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the application.

Claims (6)

1. A trailer connection comprising: a mounting assembly, a connecting rod assembly and a traction assembly, wherein,

the mounting assembly includes: a mount (1), wherein the mount (1) comprises: an upper base (10) and a lower base (11);

the connecting rod assembly includes: the device comprises a reinforcing base (2), a connecting table (3), a supporting vertical rod (6) and a reinforcing rod (7), wherein the reinforcing base (2) is connected with the rear outer wall of the upper base (10);

one end of the connecting table (3) is connected with the outer wall of the rear part of the mounting seat (1);

one end of the supporting vertical rod (6) is connected with the reinforcing base station (2), the other end of the supporting vertical rod (6) is connected with the traction assembly, and the supporting vertical rod (6) is used for reinforcing the supporting work of the base station (2);

one end of the reinforcing rod (7) is connected with the inner wall of the rear part of the reinforcing base (2), the other end of the reinforcing rod (7) is connected with the upper part of the traction assembly, and the reinforcing rod (7) is used for reinforcing the connecting rod assembly;

the traction assembly includes: the traction table comprises a supporting table assembly (8) and a traction seat structure (9), wherein the supporting table assembly (8) is connected with the connecting rod assembly and is used for supporting the traction seat structure (9);

the traction seat structure (9) is connected with the inner wall of one end of the supporting table assembly (8), and the traction seat structure (9) is used for traction of a vehicle to be towed.

2. The trailer connection of claim 1, wherein the linkage assembly further comprises: the device comprises a first supporting table (4) and a second supporting table (5), wherein the first supporting table (4) is connected with the outer wall of one end of the connecting table (3), and the first supporting table (4) is connected with the inner wall of the supporting table assembly (8);

the second supporting table (5) is connected with the outer wall below the connecting table (3), and the second supporting table (5) is connected with the inner wall of the supporting table assembly (8).

3. Trailer-connection according to claim 1, characterized in that said reinforcing abutment (2) comprises: a base main body (20), a rear rib plate (21) and a side rib plate (22), wherein,

one end of the base main body (20) is connected with the rear outer wall of the upper base (10);

the rear rib plate (21) is connected with the rear outer wall of the base main body (20);

the side rib (22) is connected to the side inner wall of the abutment body (20).

4. A trailer connection according to claim 3, characterized in that the reinforcement bar (7) comprises: an upper rod (70), a rubber column (71), a lower rod (72) and a rubber gasket (73), wherein,

the upper rod (70) is connected with the inner side wall of the rear rib plate (21);

the rubber column (71) is connected with the outer wall of the lower side of the upper rod (70) and is used for reinforcing the shock absorption supporting work of the rod (7);

the lower rod (72) is connected with the lower outer wall of the rubber column (71);

one side of the rubber gasket (73) is connected with the lower rod (72), and the other side of the rubber gasket (73) is connected with the supporting table assembly (8) and is used for avoiding rigid friction between the reinforcing rod (7) and the supporting table assembly (8).

5. Trailer connection according to claim 4, characterized in that the support table assembly (8) comprises: a supporting table main body (80), a connecting boss (81), a cover plate (82) and a mounting groove (83), wherein,

the supporting table main body (80) is connected with the outer side wall of the connecting rod assembly;

one end of the connecting boss (81) is connected with the outer wall of the supporting table main body (80), and the other end of the connecting boss (81) is connected with the lower side of the reinforcing rod (7);

the cover plate (82) is connected with the upper side of the supporting table main body (80);

the mounting groove (83) is formed in the inner side wall of the supporting table main body (80).

6. Trailer-connection according to claim 5, characterized in that the fifth-wheel structure (9) comprises: the device comprises a mounting table (90), a spring structure (91), a gas spring structure (92), a hydraulic locking structure (93), a buffer spring (94), a traction structure (95), a supporting structure (96) and a limiting structure (97),

the mounting table (90) is connected with the inner wall of the mounting groove (83);

the spring structure (91) is connected with the inner side outer wall of the mounting table (90);

the gas spring structure (92) is connected with the outer wall of the front end of the mounting table (90);

the hydraulic locking structure (93) is connected with the top outer wall of the mounting table (90);

one end of the buffer spring (94) is connected with the outer side wall of the mounting table (90), and the other end of the buffer spring (94) is connected with the outer side wall of the traction structure (95);

the traction structure (95) is connected with the outer wall of one end of the buffer spring (94);

-said support structure (96) being connected to the inside bottom of said traction structure (95);

the limiting structure (97) is connected with the mounting table (90) and the outer side wall of the traction structure (95).

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