CN113712748A

CN113712748A - Chassis suspension based on multifunctional interconnection conversion assembly and wheelchair thereof

Info

Publication number: CN113712748A
Application number: CN202111073491.9A
Authority: CN
Inventors: 管中林; 王召伟; 郁浩
Original assignee: Anhui Jinbaihe Medical Equipment Co ltd
Current assignee: Anhui Jinbaihe Medical Equipment Co ltd
Priority date: 2021-09-14
Filing date: 2021-09-14
Publication date: 2021-11-30

Abstract

The chassis suspension and the off-road wheelchair based on the multifunctional interconnection conversion assembly comprise a wheelchair frame, wherein the wheelchair frame comprises a first chassis frame, a central frame, an upright post, a locking sleeve and a second chassis frame; the top end of the outer wall of the upright post is rotatably provided with a four-wheel cross damping mechanism; the four-wheel cross damping mechanism comprises four damping components; a four-wheel steering interconnection mechanism is fixed in the middle of the outer wall of the upright post and comprises a steering fixing plate, a central steering driving assembly and four damping group assemblies; the four-wheel cross damping mechanism can be greatly switched between cross lifting and mutual conversion; the four-wheel steering interconnection mechanism can steer to adapt to the large-amplitude cross lifting torsion-eliminating movement of four wheels, and realizes flexible turning, small radius and small friction force; the four-wheel cross damping mechanism and the four-wheel steering interconnection mechanism can be folded and furled, so that the wheelchair is small in size and more convenient to transport and carry.

Description

Chassis suspension based on multifunctional interconnection conversion assembly and wheelchair thereof

Technical Field

The invention belongs to the technical field of wheelchair processing, and particularly relates to a chassis suspension based on a multifunctional interconnection conversion assembly and a wheelchair thereof.

Background

The four wheels of the wheelchair in the prior wheelchair technology are generally fixedly designed on a plane, and when the wheelchair runs on uneven ground, the wheelchair jolts or the wheels are suspended, so that the wheelchair is difficult to pass through the uneven ground. The spring provided with the damping spring is also very small, the spring is very small in compression damping and torsion eliminating stroke in the running process, and the structure is unnecessarily restricted. When the wheelchair moves in the field, particularly on the uneven ground with slightly large concave-convex difference, the wheelchair has the possibility of overturning during running, and the passing capacity and the safety and stability performance of the wheelchair are reduced. The steering system is especially suitable for the wheelchair capable of going off-road, and the existing steering technology generally adopts two types: the front wheel is in a universal swing type, the direction is controlled by the differential speed of the rear wheel, the running is good on a flat road surface, and the running is unstable on uneven terrain; and secondly, four wheels are not steered, the direction is twisted by differential speed on two sides rather than hard friction, the defect of the steering wheel is that the power consumption is large, the abrasion of the tire is fast, and the steering consumption is larger especially on uneven ground.

Disclosure of Invention

Aiming at the defects in the prior art, the invention provides a chassis suspension based on a multifunctional interconnection conversion component, and the specific technical scheme is as follows:

the chassis suspension based on the multifunctional interconnection conversion assembly comprises a wheelchair frame, wherein the wheelchair frame comprises a first chassis frame, a central frame, a stand column, a locking sleeve and a second chassis frame; the central frame is H-shaped, a stand column is vertically arranged at the center of the central frame, a first rotating rod, a second rotating rod, a third rotating rod and a fourth rotating rod are vertically fixed on four outward extending parts of the central frame, the first chassis frame and the second chassis frame are symmetrically arranged on the front side and the rear side of the central frame, two inward outward extending parts of the first chassis frame are rotatably arranged on the first rotating rod and the third rotating rod, and two inward outward extending parts of the second chassis frame are rotatably arranged on the second rotating rod and the fourth rotating rod; the two overhanging end parts of the second chassis frame are respectively sleeved with a locking sleeve in a sliding manner, and the first chassis frame and the second chassis frame can be connected into a whole when the locking sleeves are sleeved on the first chassis frame in a sliding manner;

the top end of the outer wall of the upright post is rotatably provided with a four-wheel cross damping mechanism; four-wheel cross damper includes four damper, and four damper are: the damping device comprises a first damping component, a second damping component, a third damping component and a fourth damping component, wherein the inner end of the first damping component is rotatably arranged on a first rotating rod, the inner end of the second damping component is rotatably arranged on a second rotating rod, the inner end of the third damping component is rotatably arranged on a third rotating rod, and the inner end of the fourth damping component is rotatably arranged on a fourth rotating rod; the four damping assemblies are in interconnection conversion activity, and the two damping assemblies positioned on the diagonal line are synchronously crossed, lifted and converted to adapt to various uneven terrains so as to offset torsion and increase the ground gripping force;

the outer wall middle part of stand is fixed with four-wheel steering interconnection mechanism, four-wheel steering interconnection mechanism turns to drive assembly, four shock attenuation group subassemblies including turning to fixed plate, center, and four turn to the subassembly and be: the steering fixing plate is fixed in the middle of the outer wall of the upright post in a cross manner, the outer wall of the steering fixing plate is rotatably connected with a central steering driving assembly, the central steering driving assembly is arranged on the central frame, and one rotating output end of the central steering driving assembly is connected with the first steering assembly and the second steering assembly; the other rotating output end of the central steering driving assembly is connected with a third steering assembly and a fourth steering assembly; the four steering assemblies rotate synchronously, and the steering directions of the two steering assemblies positioned at the front part are opposite to the steering directions of the two steering assemblies positioned at the rear part;

the steering assembly is arranged on the outer side of the damping assembly relatively, and the damping assembly, the steering assembly and the wheelchair frame which are arranged relatively can be synchronously rotated downwards, folded and unfolded in an upward rotating mode.

Further, four-wheel crossing damper still includes the shock attenuation fixed plate, shock attenuation fixed plate cross rotates and installs in the outer wall top of stand, the both ends four corners department of shock attenuation fixed plate rotates respectively and is connected with first damper, second damper, third damper and fourth damper.

Further, the structure is the same between first damper, second damper, third damper and the fourth damper, first damper includes shock attenuation rocking arm, damping spring, the inner of shock attenuation rocking arm rotates the suit on first bull stick, the outer end outer wall rotates the suit and is equipped with the bogie, damping spring is installed at the top of shock attenuation rocking arm, damping spring's the inner rotates to be connected in the lateral part of shock attenuation fixed plate, the outer end rotates and installs in the outer end top surface of shock attenuation rocking arm.

Furthermore, the central steering driving assembly comprises a steering motor, a swing arm, a steering main rocker arm, a steering sub rocker arm and a rotating column; the utility model discloses a steering device, including a steering fixing plate, a motor mounting plate, a motor, a swing arm, a steering motor, a steering column, a steering motor, a steering fixing plate, a motor mounting plate, a steering motor's output connection swing arm, the outer end top surface of swing arm is rotated and is connected in the middle part that turns to total rocking arm, it is the V font to turn to total rocking arm, two tip that turn to total rocking arm all rotate to be connected with and turn to the branch rocking arm, the both ends that turn to the fixing plate all rotate perpendicularly and have run through the rotary column, the top fixed connection of rotary column turns to the branch rocking arm and deviates from the other end that turns to total rocking arm, and the bottom of a rotary column is rotated and is connected first steering assembly, second steering assembly, and the bottom of another rotary column is rotated and is connected with third steering assembly, fourth steering assembly.

Furthermore, the first steering assembly, the second steering assembly, the third steering assembly and the third steering assembly are identical in structure, the first steering assembly comprises a steering pull rod, a first connecting piece and a second connecting piece, the steering pull rod comprises a horizontal part and a vertical part, the outer end of the horizontal part is bent downwards to form the vertical part, the first connecting piece comprises a first transverse rod body and a first vertical rod body, the first transverse rod body is vertically and rotatably connected with the rotary column, the outer end surface of the first transverse rod body is vertically provided with the vertical rod body, the inner end of the horizontal part is rotatably sleeved on the vertical rod body, the second connecting piece comprises a second transverse rod body and a second vertical rod body, the second transverse rod body is vertically and rotatably arranged in the vertical part, the outer end surface of the second transverse rod body is vertically provided with the second vertical rod body, and the second vertical rod body is rotatably connected with the bogie, the second vertical rod body is used for driving the bogie to swing.

Further, the bogie includes outer support body, interior support body, outer support body is the I-shaped, the inboard of outer support body is first recess, the outside is the second recess, the tip of rocking damping arm rotates to be embedded in first recess, the inside of second recess is fixed with interior support body, interior support body rotates with the second montant body and is connected.

A cross-country wheelchair is provided, which applies the chassis suspension based on the multifunctional interconnection conversion assembly.

The invention has the beneficial effects that:

1. the four-wheel cross damping mechanism can be greatly crossed, lifted and converted with each other, and the four wheels can change along with the change of the height of the ground, so that the pressure borne by the wheels at the high and low positions is basically uniform; any single wheel climbs to a high place, so that the inclination of the vehicle body is half less than that of the vehicle body in the prior art; when the wheelchair runs on uneven ground, the wheelchair can walk on the flat ground, the wheels are always ensured to have uniform contact pressure support and gripping force on the ground, flexible cross country is realized, and the safety and comfort performance and the quick passing capability of the wheelchair for cross country are greatly improved;

2. the four-wheel steering interconnection mechanism can steer to adapt to the large-amplitude cross lifting torsion-eliminating movement of four wheels, and realizes flexible turning, small radius and small friction force;

3. the four-wheel cross damping mechanism and the four-wheel steering interconnection mechanism can be folded and furled, so that the wheelchair is small in size and more convenient to transport and carry.

Drawings

FIG. 1 shows a schematic structural view of a wheelchair frame of the present invention;

FIG. 2 is a schematic diagram of the four wheel cross shock absorbing mechanism of the present invention;

FIG. 3 is a schematic view showing the connection structure of the four-wheel cross shock absorbing mechanism of the present invention to a chassis frame;

FIG. 4 is a schematic diagram of the four wheel steering mechanism of the present invention;

FIG. 5 shows a first steering assembly of the present invention in schematic configuration;

shown in the figure: 1. a wheelchair frame; 11. a first chassis frame; 12. a center frame; 121. a first rotating lever; 122. a second rotating rod; 123. a third rotating rod; 124. a fourth rotating rod; 13. a column; 131. assembling the column; 14. a locking sleeve; 15. a second chassis frame; 2. a four-wheel cross damping mechanism; 21. a damping fixing plate; 22. a first dampening member; 221. a shock absorbing rocker arm; 222. a damping spring; 23. a second dampening member; 24. a third dampening member; 25. a fourth dampening member; 3. a four-wheel steering interconnection mechanism; 31. a steering fixing plate; 311. a motor mounting plate; 32. a central steering drive assembly; 321. a steering motor; 322. swinging arms; 323. a steering master rocker arm; 324. a steering sub-rocker arm; 325. turning the column; 33. a first steering assembly; 331. a steering tie rod; 332. a first connecting member; 333. a second connecting member; 34. a second steering assembly; 35. a third steering assembly; 36. a fourth steering assembly; 4. a bogie; 41. an outer frame body; 42. an inner frame body.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Examples

As shown in fig. 1-3, the chassis suspension based on the multifunctional interconnection switching assembly comprises a wheelchair frame 1, wherein the wheelchair frame 1 comprises a first chassis frame 11, a central frame 12, a vertical column 13, a locking sleeve 14 and a second chassis frame 15; the central frame 12 is H-shaped, the upright post 13 is vertically arranged at the center of the central frame 12, four outward extending parts of the central frame 12 are vertically fixed with a first rotating rod 121, a second rotating rod 122, a third rotating rod 123 and a fourth rotating rod 124, the first chassis frame 11 and the second chassis frame 15 are symmetrically arranged at the front side and the rear side of the central frame 12, two inward outward extending parts of the first chassis frame 11 are rotatably arranged on the first rotating rod 121 and the third rotating rod 123, and two inward outward extending parts of the second chassis frame 15 are rotatably arranged on the second rotating rod 122 and the fourth rotating rod 124; the two overhanging end parts of the second chassis frame 15 are respectively sleeved with a locking sleeve 14 in a sliding manner, and the first chassis frame 11 and the second chassis frame 15 can be connected into a whole when the locking sleeves 14 are sleeved on the first chassis frame 11 in a sliding manner; the central frame can be movably connected with a first chassis frame, a second chassis frame, a four-wheel cross damping mechanism and a four-wheel steering interconnection mechanism of a split structure at four rotating rods, so that when the wheelchair is folded, a wheelchair chassis part, a damping part and a steering part can be symmetrically folded, folded and unfolded for use; when the locking sleeve is unfolded, the locking sleeve can be slid, and the extending parts of the first chassis frame and the second chassis frame are embedded into the locking sleeve, so that the first chassis frame and the second chassis frame cannot move up and down to realize positioning;

the four rotating rods can ensure that the four damping assemblies can independently lift and swing, so that damping buffering and downward rotation to a vertical state can be realized, and folding can be realized;

the top end of the outer wall of the upright post 13 is rotatably provided with a four-wheel cross damping mechanism 2; four-wheel cross damper 2 includes four damper, and four damper are: the damping device comprises a first damping assembly 22, a second damping assembly 23, a third damping assembly 24 and a fourth damping assembly 25, wherein the inner end of the first damping assembly 22 is rotatably mounted on a first rotating rod 121, the inner end of the second damping assembly 23 is rotatably mounted on a second rotating rod 122, the inner end of the third damping assembly 24 is rotatably mounted on a third rotating rod 123, and the inner end of the fourth damping assembly 25 is rotatably mounted on a fourth rotating rod 124; the four damping assemblies are in interconnection conversion activity, and the two damping assemblies positioned on the diagonal line are synchronously crossed, lifted and converted to adapt to various uneven terrains so as to offset torsion and increase the ground gripping force;

the outer wall middle part of stand 13 is fixed with four-wheel steering interconnection mechanism 3, four-wheel steering interconnection mechanism 3 turns to drive assembly 32, four shock attenuation group subassemblies including turning to fixed plate 31, center, and four turn to the subassembly and are: the steering mechanism comprises a first steering assembly 33, a second steering assembly 34, a third steering assembly 35 and a fourth steering assembly 36, wherein the steering fixing plate 31 is fixed in the middle of the outer wall of the upright post 13 in a crossed manner, the outer wall of the steering fixing plate 31 is rotatably connected with a central steering driving assembly, the central steering driving assembly is arranged on the central frame 12, and one rotating output end of the central steering driving assembly is connected with the first steering assembly 33 and the second steering assembly 34; the other rotating output end of the central steering driving assembly is connected with a third steering assembly 35 and a fourth steering assembly 36; the central steering driving assembly can drive the first steering assembly and the second steering assembly on one side to synchronously move inwards or outwards, and simultaneously drive the third steering assembly and the fourth steering assembly on the other side to synchronously move outwards or inwards;

the four steering assemblies rotate synchronously, and the steering directions of the two steering assemblies positioned at the front part are opposite to the steering directions of the two steering assemblies positioned at the rear part; the front wheels and the rear wheels are opposite in steering, so that the steering range can be reduced, and the steering is quicker and more flexible;

As shown in fig. 1-2, the four-wheel cross shock-absorbing mechanism 2 further includes a shock-absorbing fixing plate 21, the shock-absorbing fixing plate 21 is cross-rotatably mounted on the top end of the outer wall of the upright 13, and four corners of two ends of the shock-absorbing fixing plate 21 are rotatably connected with a first shock-absorbing assembly 22, a second shock-absorbing assembly 23, a third shock-absorbing assembly 24 and a fourth shock-absorbing assembly 25 respectively; the top end of the upright column 13 is coaxially provided with an assembly column 131 with a smaller inner diameter, and the damping fixing plate 21 is rotatably arranged on the assembly column and is stopped on the step surface of the upright column; the damping fixing plate is rotationally designed, four-axis linkage driving can be realized, and exemplarily, when the first damping assembly is jacked up, the damping fixing plate can drive the second damping assembly to move downwards, the third damping assembly to move upwards and the fourth damping assembly to move downwards;

the structure of the first damping assembly 22, the second damping assembly 23, the third damping assembly 24 and the fourth damping assembly 25 is the same, the first damping assembly 22 comprises a damping rocker arm 221 and a damping spring 222, the inner end of the damping rocker arm 221 is rotatably sleeved on the first rotating rod 121, the outer wall of the outer end of the damping rocker arm 221 is rotatably sleeved with a bogie 4, the damping spring 222 is installed at the top of the damping rocker arm 221, the inner end of the damping spring 222 is rotatably connected to the side of the damping fixing plate 21, and the outer end of the damping spring 222 is rotatably installed on the top surface of the outer end of the damping rocker arm 221; when the damping rocker arm moves upwards, the damping spring can be driven to rotate upwards, so that the compression spring realizes buffering, and when the damping rocker arm moves downwards, the damping rocker arm can drive the damping to move downwards, so that damping buffering is realized.

Two sides of the damping fixing plate 21 are symmetrically provided with four pillars in pairs, and each pillar is vertically and rotatably connected with the top end of the damping spring 222; the strut is a top end rotating area of the damping spring;

as shown in fig. 4, the central steering driving assembly 32 includes a steering motor 321, a swing arm 322, a steering main rocker arm 323, a steering sub-rocker arm 324, and a steering column 325; a motor mounting plate 311 is arranged in the middle of the surface of the steering fixing plate 31, a steering motor 321 is mounted on the bottom surface of the motor mounting plate 311, an output end of the steering motor 321 is connected with a swing arm 322, the top surface of the outer end of the swing arm 322 is rotatably connected to the middle of a steering main rocker arm 323, and the steering main rocker arm 323 is V-shaped; two ends of the steering main rocker arm 323 are rotatably connected with steering sub rocker arms 324;

the steering main rocker arm is designed into a V shape, and can apply an inclined force to the steering sub rocker arm, so that the steering sub rocker arm can rotate, and the included angle of the V shape is 160 degrees; the steering motor drives the swing arm to swing so as to drive the two steering sub-rocker arms to rotate, and the steering main rocker arm, the steering sub-rocker arms and the steering fixing plate enclose a linkage parallelogram rotating structure;

the two ends of the steering fixing plate 31 vertically rotate to penetrate through the steering columns 325, the top ends of the steering columns 325 are fixedly connected with the other ends, away from the steering main rocker arm 323, of the steering sub rocker arms 324, the bottom end of one steering column 325 is rotatably connected with the first steering assembly 33 and the second steering assembly 34, and the bottom end of the other steering column 325 is rotatably connected with the third steering assembly 35 and the fourth steering assembly 36; when the steering sub-rocker arm rotates, the steering column can be driven to rotate, and the steering column can drive the two steering assemblies connected with the steering column to synchronously move, so that four-wheel synchronous deflection steering can be realized; the rotary column can be used as a transmission structure for up-and-down linkage, so that three-way linkage is realized.

As shown in fig. 4 and 5, the first steering assembly 33, the second steering assembly 34, the third steering assembly 35 and the fourth steering assembly 36 have the same structure, the first steering assembly 33 includes a steering rod 331, a first connecting member 332 and a second connecting member 333, the steering rod 331 includes a horizontal portion and a vertical portion, the outer end of the horizontal portion is bent downward to form the vertical portion, the first connecting member includes a first cross rod body and a first vertical rod body, the first cross rod body is vertically and rotatably connected with the rotating column 325, the outer end surface of the first cross rod body is vertically provided with the vertical rod body, and the inner end of the horizontal portion is rotatably sleeved on the vertical rod body; the first vertical rod body is designed to realize horizontal rotation of the horizontal part;

the second connecting member 333 includes a second cross rod body vertically screwed into the vertical portion, and a second vertical rod body vertically provided on an outer end surface of the second cross rod body, the second vertical rod body being rotatably connected to the bogie, the second vertical rod body being configured to drive the bogie to swing; the design of vertical portion is convenient for with second connecting piece positioning, and the second montant physical stamina is enough vertical to stretch into the bogie, realizes that the bogie rotates steadily.

As shown in fig. 5, the bogie 4 includes an outer frame body 41 and an inner frame body 42, the outer frame body 41 is i-shaped, the inner side of the outer frame body is a first groove, the outer side of the outer frame body is a second groove, the end of the shock absorbing rocker arm 221 is rotatably embedded in the first groove, the inner frame body 42 is fixed inside the second groove, and the inner frame body 42 is rotatably connected with a second vertical rod body; the steering linkage can drive the inner frame body to rotate, so that the outer frame body rotates around the damping rocker arm to swing a vehicle, and wheels are installed at the bottom of the inner frame body.

The invention is implemented as follows:

four-wheel is damping mechanism 2 alternately and is at work: when the wheel to which the first damping component 22 is opposite is jacked up, the bogie 4 and the damping rocker arm 221 above the first damping component can upwards rotate around the first rotating rod 121, the damping spring 222 can be compressed when the first damping component 22 upwards rotates, meanwhile, the damping spring 222 can push the damping fixing plate 21 to clockwise rotate, and when the damping fixing plate 21 clockwise rotates, the second damping component 23 and the third damping component 24 can be downwards pushed, so that the second damping component 23 and the third damping component 24 downwards move to grab the ground, meanwhile, the spring connected with the second damping component can contract, and the damping fixing plate 21 drives the fourth damping component 25 to upwards lift so that the spring contracts;

the locking sleeve 14 can limit the first chassis frame 11 and the second chassis frame 15 from the upper part and the lower part in a stopping way, so that the wheelchair frame 1 is prevented from being loose;

the four-wheel steering interconnection mechanism 3 is in operation: when steering is needed, the steering motor 321 drives the swing arm 322 to swing anticlockwise so as to drive the steering main swing arm 323 to swing, the steering main swing arm 323 drives the rotary columns 325 at two ends to rotate anticlockwise, the rotary column 325 at one side drives the first steering component 33 and the second steering component 34 connected with the rotary columns to synchronously move outwards, the steering pull rod 331 pushes the steering frame 4 and wheels thereof to rotate anticlockwise when moving outwards, and the same second steering component 34 drives the wheels to rotate clockwise; the rotating column 325 on the other side drives the third steering assembly 35 and the fourth steering assembly 36 connected with the rotating column to synchronously move outwards, the third steering assembly 35 drives the wheels to rotate anticlockwise, and the fourth steering assembly 36 drives the wheels to rotate clockwise; thus, four-wheel synchronous steering is realized, and the action response is fast;

the storage state is as follows: when the wheelchair needs to be folded and folded, the locking sleeve 4 is moved to the second chassis frame 15 and separated from the first chassis frame 11, then the damping rocker arms of the damping components are rotated downwards, so that the damping rocker arms and the damping springs rotate downwards simultaneously, the steering component corresponding to the outer side of each damping component also rotates downwards along with the damping rocker arms synchronously, and the first chassis frame and the second chassis frame rotate downwards, so that the four-wheel cross damping mechanism 2, the four-wheel steering interconnection mechanism 3 and the wheelchair frame 1 are folded and folded to be in a vertical state, and the wheelchair is folded;

the top end of the mounting post 131 is rotatably connected to the seat pan assembly, the seat pan assembly is vertically rotatably connected to the backrest assembly, the backrest assembly is folded onto the seat pan assembly, and then the seat pan assembly is folded.

It is noted that, in this document, relational terms such as first and second, and the like, if any, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims

1. Chassis suspension based on multi-functional interconnection conversion subassembly, its characterized in that: the wheelchair comprises a wheelchair frame, wherein the wheelchair frame comprises a first chassis frame, a central frame, a stand column, a locking sleeve and a second chassis frame; the central frame is H-shaped, a stand column is vertically arranged at the center of the central frame, a first rotating rod, a second rotating rod, a third rotating rod and a fourth rotating rod are vertically fixed on four outward extending parts of the central frame, the first chassis frame and the second chassis frame are symmetrically arranged on the front side and the rear side of the central frame, two inward outward extending parts of the first chassis frame are rotatably arranged on the first rotating rod and the third rotating rod, and two inward outward extending parts of the second chassis frame are rotatably arranged on the second rotating rod and the fourth rotating rod; the two overhanging end parts of the second chassis frame are respectively sleeved with a locking sleeve in a sliding manner, and the first chassis frame and the second chassis frame can be connected into a whole when the locking sleeves are sleeved on the first chassis frame in a sliding manner;

2. The multifunctional interconnect transition module based chassis suspension of claim 1, further comprising: the four-wheel cross damping mechanism further comprises a damping fixing plate, the damping fixing plate is installed on the top end of the outer wall of the stand column in a cross-shaped rotating mode, and four corners of the two ends of the damping fixing plate are respectively connected with a first damping assembly, a second damping assembly, a third damping assembly and a fourth damping assembly in a rotating mode.

3. The multifunctional interconnect transition module based chassis suspension of claim 2, wherein: the structure is the same between first damper assembly, second damper assembly, third damper assembly and the fourth damper assembly, first damper assembly includes shock attenuation rocking arm, damping spring, the inner of shock attenuation rocking arm rotates the suit on first bull stick, the outer end outer wall rotates the suit and is equipped with the bogie, damping spring is installed at the top of shock attenuation rocking arm, damping spring's inner rotates to be connected in the lateral part of shock attenuation fixed plate, the outer end rotates and installs in the outer end top surface of shock attenuation rocking arm.

4. The multifunctional interconnect transition module based chassis suspension of claim 2, wherein: the central steering driving assembly comprises a steering motor, a swing arm, a steering main rocker arm, a steering sub rocker arm and a rotary column; the utility model discloses a steering device, including a steering fixing plate, a motor mounting plate, a motor, a swing arm, a steering motor, a steering column, a steering motor, a steering fixing plate, a motor mounting plate, a steering motor's output connection swing arm, the outer end top surface of swing arm is rotated and is connected in the middle part that turns to total rocking arm, it is the V font to turn to total rocking arm, two tip that turn to total rocking arm all rotate to be connected with and turn to the branch rocking arm, the both ends that turn to the fixing plate all rotate perpendicularly and have run through the rotary column, the top fixed connection of rotary column turns to the branch rocking arm and deviates from the other end that turns to total rocking arm, and the bottom of a rotary column is rotated and is connected first steering assembly, second steering assembly, and the bottom of another rotary column is rotated and is connected with third steering assembly, fourth steering assembly.

5. The multifunctional interconnect transition module based chassis suspension of claim 4, wherein: the first steering assembly, the second steering assembly, the third steering assembly and the third steering assembly have the same structure, the first steering assembly comprises a steering pull rod, a first connecting piece and a second connecting piece, the steering pull rod comprises a horizontal part and a vertical part, the outer end of the horizontal part is bent downwards to form a vertical part, the first connecting piece comprises a first transverse rod body and a first vertical rod body, the first transverse rod body is vertically and rotatably connected with the rotary column, the outer end surface of the first transverse rod body is vertically provided with a vertical rod body, the inner end of the horizontal part is rotatably sleeved on the vertical rod body, the second connecting piece comprises a second transverse rod body and a second vertical rod body, the second transverse rod body is vertically and rotatably arranged in the vertical part, the outer end surface of the second transverse rod body is vertically provided with a second vertical rod body, the second vertical rod body is rotatably connected with the bogie and used for driving the bogie to swing.

6. The multifunctional interconnect transfer assembly-based chassis suspension of claim 5, wherein: the bogie comprises an outer frame body and an inner frame body, wherein the outer frame body is I-shaped, the inner side of the outer frame body is a first groove, the outer side of the outer frame body is a second groove, the end part of the damping rocker arm is embedded into the first groove in a rotating mode, the inner frame body is fixed inside the second groove, and the inner frame body is connected with a second vertical rod in a rotating mode.

7. An off-road wheelchair, characterized in that: the off-road wheelchair employs the chassis suspension based multi-functional interconnected transition set of claim 1.