Base capable of converting and increasing road holding force of driving wheels and wheelchair thereof

Abstract

The base comprises a chassis frame, the end portions of the two sides of the chassis frame are rotationally connected with a left front longitudinal conversion rod and a right front longitudinal conversion rod, one end of the left front longitudinal conversion rod is connected with a left front wheel, and the other end of the left front longitudinal conversion rod is rotationally connected with a left connecting assembly. The connecting position of the left front longitudinal switching rod and the left connecting assembly is connected with the chassis frame, a left driving wheel is installed on the inner side of the left connecting assembly, and a second spiral spring is movably connected between the left connecting assembly and the left front longitudinal switching rod. The other side of the left connecting assembly is movably connected with a left rear longitudinal conversion rod, and the end part of the left rear longitudinal conversion rod is connected with a left rear wheel; the connection condition of the right front longitudinal conversion rod is the same as that of the left end; a transverse conversion assembly is movably connected between the left rear longitudinal conversion rod and the right rear longitudinal conversion rod. According to the wheelchair with the six interconnected wheels, cross-country is smoother, safer, quicker and easier, and the quick passing capacity of the wheelchair is greatly improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a wheelchair equipment technical field, concretely is a base of conversion increase driving wheel adhesion and wheelchair thereof. BACKGROUND

[0002] Wheelchair provides important travel and life convenience for the person who cannot move, helps them to improve the life self-care ability and social participation, the existing wheelchair car chassis design in society, generally wheel is stiff fixed design on a plane, including scooter and folding wheelchair, when the wheelchair drives on the ground that is not flat or slightly uneven, the low wheel will also appear in the air, loses the adhesion of opposite side. Also design spiral spring installation in the wheel does shock absorption, all because the wheelchair volume is small, the spring used also can be particularly small, corresponding shock absorption stroke also can be particularly small, actually the effect of shock absorption and torque reduction is very small, still can appear difficult to pass on the ground that is slightly uneven. CONTENT OF THE UTILITY MODEL

[0003] In view of the deficiency of prior art, the utility model aims at providing a base of conversion increase driving wheel adhesion and wheelchair thereof, can solve the existing problem.

[0004] In order to realize above-mentioned purpose, the technical scheme of the utility model is as follows:

[0005] The utility model is through the following technical scheme to realize: a base of conversion increase driving wheel adhesion and wheelchair thereof, including chassis frame, the both sides end of chassis frame rotatory connection left front longitudinal conversion rod and right front longitudinal conversion rod, one end of left front longitudinal conversion rod connects left front wheel, the other end of left front longitudinal conversion rod rotatory connection left connecting assembly, and the connecting place of left front longitudinal conversion rod with left connecting assembly is connected with chassis frame, the inside of left connecting assembly is installed with left drive wheel, the left connecting assembly with left front longitudinal conversion rod between swing joint has spiral spring no.

[0006] One end of right front longitudinal conversion rod connects right front wheel, the other end of right front longitudinal conversion rod rotatory connection right connecting assembly, and the connecting place of right front longitudinal conversion rod with right connecting assembly is connected with chassis frame, the inside of right connecting assembly is installed with right drive wheel, the right connecting assembly with right front longitudinal conversion rod between swing joint has spiral spring three, the other side of right connecting assembly swing joint right rear longitudinal conversion rod, and the end of right rear longitudinal conversion rod connects right rear wheel.

[0007] Swing joint transverse conversion assembly between left rear longitudinal conversion rod and right rear longitudinal conversion rod.

[0008] Further, the transverse conversion assembly comprises a left linkage assembly, a helical spring and a right linkage assembly; one end of the left linkage assembly is connected to the chassis frame, and the side of the left linkage assembly is connected to the left rear longitudinal conversion rod; the other end of the left linkage assembly is rotationally connected to the right linkage assembly, and the rotationally connected point of the left linkage assembly and the right linkage assembly is connected to the chassis frame; one end of the right linkage assembly is connected to the chassis frame, and the side of the right linkage assembly is connected to the right rear longitudinal conversion rod; the left linkage assembly and the right linkage assembly are connected by the helical spring.

[0009] Further, the left linkage assembly and the right linkage assembly have the same structure, and the left linkage assembly comprises a cross rod, a rotating rod and a conversion pull rod; the cross rod is rotationally connected to the right linkage assembly, and the connection point of the cross rod and the right linkage assembly is connected to the chassis frame; the other end of the cross rod is rotationally connected to the conversion pull rod, and the other end of the conversion pull rod is movably connected to the rotating rod; the other end of the rotating rod is connected to the chassis frame, and the side of the rotating rod is connected to the left rear longitudinal conversion rod.

[0010] Further, the two ends of the conversion pull rod form joint bearings, one of which is rotationally connected to the cross rod, and the other is rotationally connected to the rotating rod.

[0011] Further, the left linkage assembly and the right linkage assembly have the same structure, and the left linkage assembly comprises a left rear support rod, an outer shell and a left front support rod; the inner side of the outer shell is provided with a left drive wheel, the side of the outer shell is fixed with the left front support rod, the left front support rod is rotationally connected to the left front longitudinal conversion rod, and the connection point of the two is connected to the chassis frame; the left front longitudinal conversion rod and the left front support rod are movably connected by a helical spring two; the other side of the outer shell is connected to the left rear support rod, and the left rear support rod is connected to the left rear longitudinal conversion rod; the left rear longitudinal conversion rod is connected to the rotating rod.

[0012] Further, the diameter of the left drive wheel is greater than that of the left front wheel and the left rear wheel, and the diameter of the right drive wheel is greater than that of the right front wheel and the right rear wheel; the left drive wheel and / or the right drive wheel is connected to a driving mechanism.

[0013] A wheelchair comprises the base for increasing the driving wheel grip force and the wheelchair according to any one of the above-mentioned conversion assemblies, and the top end of the base is provided with a support assembly, the top end of the support assembly is connected to a seat assembly, and the side of the seat assembly is rotationally connected to a footboard.

[0014] Further, the support assembly comprises an outer sleeve rod and an inner plug rod; the top end of the chassis frame is upwardly extended to form the outer sleeve rod, the inner plug rod is inserted into the outer sleeve rod; the seat assembly is arranged at the top end of the inner plug rod; and the inner plug rod and the outer sleeve rod are connected by a bolt.

[0015] Compared with the prior art, the utility model has the beneficial effects including:

[0016] The utility model discloses set up transverse switching subassembly, when the front wheel and drive wheel of any one side of base and rear wheel and drive wheel are elevated simultaneously or the rear wheel of single side is elevated, can convert through transverse switching subassembly, avoid cutting down the load of the drive wheel of another side and ground gripping force, avoid the body of car to appear to dump.

[0017] The utility model discloses a base and wheelchair, six wheels of the base of the utility model are connected with each other, make six wheel wheelchair car middle big drive wheel load increase one time, that is big drive wheel ground driving force increases one time, realized drive wheel on the concave and convex uneven ground, wheelchair any attitude condition, ground driving force will not change. A common coil spring is arranged between the front wheel and the drive wheel in the transverse conversion component, realizing that the wheelchair can be greatly damped as a whole, each group of double wheels can be damped synchronously, and single wheels can be damped independently. Because they realize overall interconnection, the higher or lower the driving synchronization of any single wheel, double wheels or three wheels is, the less impact on the ground supporting force of any other wheel. The single wheel obstacle rising makes the wheelchair car tilt, which is only one fourth of the tilt angle of the existing wheelchair, that is, the jolt is reduced by four times. The load of each wheel obstacle climbing does not gradually increase with the gradual rising of the wheel, and compared with the existing wheelchair, the load gradually decreases. This shows that the six-wheel interconnected wheelchair is more smooth and safe in off-road, more efficient and easy, and greatly improves the rapid passing ability of the wheelchair. BRIEF DESCRIPTION OF DRAWINGS

[0018] The disclosure of the utility model will be explained with reference to the drawings. It should be understood that the drawings are only for illustrative purposes, and are not intended to limit the scope of protection of the utility model. In the drawings, the same reference signs are used to refer to the same parts. Among them:

[0019] Figure 1 It is the whole explosion structure schematic diagram of the base and wheelchair of the utility model for converting and increasing the ground gripping force of the drive wheel;

[0020] Figure 2 It is the structure schematic diagram of the whole assembly of the base and wheelchair of the utility model for converting and increasing the ground gripping force of the drive wheel;

[0021] Figure 3 It is the overhead structure schematic diagram of the whole assembly after the utility model embodiment;

[0022] Figure 4 It is the whole structure schematic diagram of the wheelchair of the utility model embodiment;

[0023] Figure 5 It is the utility model embodimentFigure 4 Enlarged structural schematic view at A in the middle;

[0024] Figure 6 Structural schematic view for the first embodiment of the present application;

[0025] Figure 7 Structural schematic view for the second embodiment of the present application;

[0026] Figure 8 Structural schematic view for the third embodiment of the present application;

[0027] Figure 9 Structural schematic view for the fourth embodiment of the present application;

[0028] Figure 10 Structural schematic view for the fifth embodiment of the present application.

[0029] In the figure, the following are marked: 1, chassis frame; 2, transverse conversion assembly; 21, left linkage assembly; 211, crossbar; 212, conversion pull rod; 213, rotating rod; 22, helical spring one; 23, right linkage assembly; 3, left rear wheel; 4, left rear longitudinal conversion rod; 5, left drive wheel; 6, left connecting assembly; 61, left rear support rod; 62, outer sheath; 63, left front support rod; 7, left front wheel; 8, left front longitudinal conversion rod; 9, helical spring two; 10, right front wheel; 11, right front longitudinal conversion rod; 12, helical spring three; 13, right connecting assembly; 14, right drive wheel; 15, right rear longitudinal conversion rod; 16, right rear wheel; 17, seat assembly; 18, support assembly; 181, outer sleeve rod; 182, inner plug-in rod; 19, footboard. DETAILED DESCRIPTION

[0030] It is easy to understand that, according to the technical scheme of the present application, a person skilled in the art can propose a plurality of structure modes and implementation modes which can be replaced with each other without changing the essential spirit of the present application. Therefore, the following detailed description and the accompanying drawings are only exemplary descriptions of the technical scheme of the present application, and should not be regarded as the whole or regarded as the limitation or restriction of the technical scheme of the present application.

[0031] A conversion base for increasing the driving wheel grip force and a wheelchair thereof, exemplary, such as Figures 1-3As shown, including chassis frame 1, both sides of the end of the rotating connection left front longitudinal conversion rod 8 and right front longitudinal conversion rod 11, one end of the left front longitudinal conversion rod 8 is connected with left front wheel 7, the other end of the left front longitudinal conversion rod 8 is rotatably connected with left connecting assembly 6, and the connection between the left front longitudinal conversion rod 8 and the left connecting assembly 6 is connected with the chassis frame 1, the inner side of the left connecting assembly 6 is provided with left drive wheel 5, and the left connecting assembly 6 and the left front longitudinal conversion rod 8 are movably connected with helical spring two 9; the other side of the left connecting assembly 6 is movably connected with left rear longitudinal conversion rod 4, and the end of the left rear longitudinal conversion rod 4 is connected with left rear wheel 3.

[0032] Specifically, the left connecting assembly 6 includes left rear support rod 61, outer shell 62 and left front support rod 63; the inner side of the outer shell 62 is provided with left drive wheel 5, the side of the outer shell 62 is fixed with left front support rod 63, and the left front support rod 63 is rotatably connected with the left front longitudinal conversion rod 8 and connected with the chassis frame 1, and the left front longitudinal conversion rod 8 and the left front support rod 63 are movably connected with helical spring two 9; the other side of the outer shell 62 is connected with left rear support rod 61, and the left rear support rod 61 is connected with left rear longitudinal conversion rod 4.

[0033] One end of the right front longitudinal conversion rod 11 is connected with right front wheel 10, the other end of the right front longitudinal conversion rod 11 is rotatably connected with right connecting assembly 13, and the connection between the right front longitudinal conversion rod 11 and the right connecting assembly 13 is connected with the chassis frame 1, the inner side of the right connecting assembly 13 is provided with right drive wheel 14, and the right connecting assembly 13 and the right front longitudinal conversion rod 11 are movably connected with helical spring three 12; the other side of the right connecting assembly 13 is movably connected with right rear longitudinal conversion rod 15, and the end of the right rear longitudinal conversion rod 15 is connected with right rear wheel 16; the right connecting assembly 13 and the left connecting assembly 6 are the same structure, and the connection relationship between the right connecting assembly 13 and the right front longitudinal conversion rod 11, the right rear longitudinal conversion rod 15 is the same as that between the left connecting assembly 6 and the left front longitudinal conversion rod 8, the left rear longitudinal conversion rod 4.

[0034] The left rear longitudinal conversion rod 4 and the right rear longitudinal conversion rod 15 are movably connected with the transverse conversion assembly 2. Specifically, the transverse conversion assembly 2 comprises a left linkage assembly 21, a helical spring 22 and a right linkage assembly 23; one end of the left linkage assembly 21 is connected with the chassis frame 1, and the side of the left linkage assembly 21 is connected with the left rear longitudinal conversion rod 4; the other end of the left linkage assembly 21 is rotatably connected with the right linkage assembly 23, and the rotation connection point of the left linkage assembly 21 and the right linkage assembly 23 is connected with the chassis frame 1; one end of the right linkage assembly 23 is connected with the chassis frame 1, and the side of the right linkage assembly 23 is connected with the right rear longitudinal conversion rod 15; the left linkage assembly 21 and the right linkage assembly 23 are connected through the helical spring 22.

[0035] Specifically, the left linkage assembly 21 and the right linkage assembly 23 have the same structure, and the left linkage assembly 21 comprises a cross rod 211, a rotating rod 213 and a conversion pull rod 212; the cross rod 211 is rotatably connected with the right linkage assembly 23, and the rotation connection point of the cross rod 211 and the right linkage assembly 23 is connected with the chassis frame 1; the other end of the cross rod 211 is rotatably connected with the conversion pull rod 212, and the other end of the conversion pull rod 212 is movably connected with the rotating rod 213; the other end of the rotating rod 213 is connected with the chassis frame 1, and the side of the rotating rod 213 is connected with the left rear longitudinal conversion rod 4; the middle of the left rear longitudinal conversion rod 4 is connected with the rotating rod 213, and one end of the left rear longitudinal conversion rod 4 is connected with the left rear support rod 61, and the other end is connected with the left rear wheel 3.

[0036] The two ends of the conversion pull rod 212 form joint bearings, one of which is rotatably connected with the cross rod 211, and the other is rotatably connected with the rotating rod 213.

[0037] The diameter of the left driving wheel 5 is greater than that of the left front wheel 7 and the left rear wheel 3, and the diameter of the right driving wheel 14 is greater than that of the right front wheel 10 and the right rear wheel 16; the left driving wheel 5 and / or the right driving wheel 14 is connected with a driving mechanism. The driving mechanism is used to drive the left driving wheel 5 and / or the right driving wheel 14 to move. The driving mechanism is prior art, and an example of the driving mechanism generally comprises a battery, a controller and a motor. An electric wheelchair generally uses a lead-acid battery or a lithium battery for power supply. These batteries can store electric energy to provide a power source for the operation of the wheelchair. The controller is the "brain" of the electric wheelchair, which receives signals from input devices such as joysticks and controls the size and direction of the current output by the battery to the motor according to these signals. The motor is the power execution component of the electric wheelchair, which works under the action of the battery and the controller. When the controller transmits the electric energy output by the battery to the motor, the coil inside the motor is subjected to the action of the Ampere force in the magnetic field, generating a rotary torque, thereby driving the rotation of the motor shaft, enabling the wheelchair to move forward, backward, turn and so on.

[0038] The base is applied to a wheelchair, but is not limited to this, and is taken as an example to illustrate the base applied to a wheelchair. Figure 4 and Figure 5 As shown in the figure, a wheelchair comprises the base and the wheelchair, the base is used for converting and increasing the driving wheel grip force, a support assembly 18 is formed at the top of the four corners of the base, a seat assembly 17 is connected to the top of the support assembly 18, and a foot pedal 19 is rotationally connected to the side of the seat assembly 17.

[0039] The support assembly 18 comprises an outer sleeve rod 181 and an inner plug rod 182, the top of the four corners of the base frame 1 is extended upward to form the outer sleeve rod 181, the left linkage assembly 21 and the right linkage assembly 23 are rotationally connected to the outer sleeve rod 181 through a connecting rod, or are directly rotationally connected to the connecting rods extended from the base frame 1, the inner plug rod 182 is inserted into the inner sleeve rod 181, the seat assembly 17 is arranged at the top of the inner plug rod 182, and a bolt is arranged between the inner plug rod 182 and the outer sleeve rod 181, the support assembly 18 is used for adjusting the height of the seat assembly 17, and the bottom of the foot pedal 19 is provided with wheels to facilitate movement.

[0040] In use, the first implementation case is taken as an example, when passing through a flat road surface, as shown in the figure, Figure 6 each wheel is in contact with the ground, the force is stable, the ground support grip of any wheel is not affected, and the wheelchair runs stably.

[0041] In the second implementation case, when the front wheels and the rear wheels of the whole wheelchair pass through a convex ground surface, as shown in the figure, Figure 7 the right front wheel 10 and the right rear wheel 16 are taken as an example to illustrate that, when the right front wheel 10 and the right rear wheel 16 are lifted due to the convexity, the right front longitudinal conversion rod 11 rotates due to the lifting of the right front wheel 10, the helical spring three 12 is in a compressed state, the elastic force of the helical spring three 12 acts on the right connecting assembly 13, and then the right connecting assembly 13 exerts force on the right driving wheel 14, when the right rear wheel 16 is lifted due to the convexity, the right rear longitudinal conversion rod 15 drives the rotating rod 213 of the right linkage assembly 23 to rotate, and the right linkage assembly 23 is lifted and rotated to compress the helical spring one 22; the helical spring one 22 exerts force on the left rear longitudinal conversion rod 4 through the left linkage assembly 21, so that the lifting of the front wheels and the rear wheels is avoided, the driving wheel load and the ground grip are reduced, the vehicle is kept stable, and the helical spring is used for large-amplitude shock absorption.

[0042] In the third implementation case, when the front wheels of the whole wheelchair pass through a convex ground surface, the right side of the wheelchair is taken as an example to illustrate, as shown in the figure, Figure 8As shown, at this time, the right front wheel 10 rises due to the bump, the right front longitudinal conversion rod 11 rotates due to the rise of the right front wheel 10, the helical spring three 12 is in a compressed state at this time, and then the right connecting assembly 13 is forced to press down, so that the right drive wheel 14 is forced, thereby avoiding the reduction of the driving wheel load and the ground gripping force due to the rise of the front wheel, and not affecting the wheel gripping force.

[0043] Case four, when the front wheels and the drive wheels of the whole wheelchair pass through the bump, as shown in Figure 9 As shown, taking the right side of the wheelchair as an example, at this time, the right front wheel 10 and the right drive wheel 14 rise due to the bump, and the right drive wheel 14 drives the right connecting assembly 13 to rise when rising, drives the right rear longitudinal conversion rod 15 to rotate, and drives the right linkage assembly 23 to rotate downward under force, so that the helical spring one 22 is stretched, thereby buffering the vibration when passing through the bump, and avoiding the reduction of the driving wheel load and the ground gripping force due to the rise of the front wheel.

[0044] Case five, when the left front wheel 7 of the whole wheelchair passes through the bump, the right front wheel 10 and the right drive wheel 14 pass through the depression, and the right rear wheel 16 passes through the bump, as shown in Figure 10 As shown, the left front wheel 7 drives the left front longitudinal conversion rod 8 to rotate, and then compresses the helical spring two 9; when the right rear wheel 16 rises due to the bump, the right rear longitudinal conversion rod 15 can drive the rotating rod 213 of the right linkage assembly 23 to rotate, so that the right linkage assembly 23 rises and rotates to compress the helical spring one 22; the helical spring one 22 drives the left rear longitudinal conversion rod 4 through the left linkage assembly 21, and then drives the horizontal conversion assembly 2, thereby realizing the support of the driving wheel without affecting the gripping force, maintaining the stability of the vehicle, and greatly reducing the shock.

[0045] As can be seen from the above implementation cases, when the front wheels and the drive wheels on any side rise at the same time, the horizontal conversion assembly can be converted to avoid the reduction of the driving wheel load and the ground gripping force on the other side; when the drive wheels and the rear wheels on any side, or the rear wheels on any side, rise, the conversion assembly can be converted to avoid the reduction of the driving wheel load and the ground gripping force on the other side, so if there is no conversion of the horizontal conversion assembly, when the front two wheels and the rear two wheels on any side rise at the same time, the vehicle body is easy to tilt, and the driving wheel load and the ground gripping force on the other side are reduced; or when the two universal wheels on the rear side rise on any side, the driving wheel gripping force on the other side is also reduced.

[0046] The utility model discloses a base and wheelchair, the rear side of base is provided with horizontal conversion subassembly and makes horizontal conversion subassembly connect to rear wheel through conversion rod, left rear wheel connects left rear longitudinal conversion rod, and left rear longitudinal conversion rod swing joint left connecting subassembly of the outside of left drive wheel, right rear wheel connects right rear longitudinal conversion rod, and right rear longitudinal conversion rod swing joint right connecting subassembly of the outside of right drive wheel, and right connecting subassembly of the outside of right drive wheel swing joint right front longitudinal conversion rod, and right front longitudinal conversion rod connects right front wheel, and left connecting subassembly of the outside of left drive wheel swing joint left front longitudinal conversion rod, and left front longitudinal conversion rod connects left front wheel left connecting subassembly swing joint respectively.

[0047] The six wheels of the base are connected with each other, so that the load of the middle large drive wheel of the six-wheel wheelchair is doubled, that is, the ground gripping driving force of the large drive wheel is doubled, and the ground gripping driving force does not change under any posture of the wheelchair on the concave-convex uneven ground. A common spiral spring is arranged between the front wheel and the drive wheel in the horizontal conversion subassembly, so that the wheelchair can be greatly damped as a whole, each group of double wheels can be synchronously damped, and single wheels can be independently damped. Because they are interconnected as a whole, the higher or lower the synchronous driving of any single wheel, any double wheel or any three wheels is, the less the ground gripping force of any other wheel is affected. The single wheel is lifted to cross the obstacle, so that the wheelchair is tilted, and the tilt angle is only one fourth of the tilt angle of the prior art wheelchair, that is, the jolt is reduced by four times. The load of each wheel is not gradually increased with the gradual lifting of the wheel, and is gradually reduced compared with the prior art wheelchair. This shows that the six-wheel interconnected wheelchair is more smooth and safe in off-road driving, is more convenient and easy, and greatly improves the rapid passing ability of the wheelchair.

[0048] In the description of the utility model, it is to be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as a limitation on the utility model.

[0049] In the description of the patent, it should be explained that, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "setting" should be understood in a broad sense, for example, can be fixedly connected, set, or can be detachably connected, set, or integrally connected, set. For ordinary skilled in the art, the specific meaning of the above terms in the patent can be understood according to the specific circumstances.

[0050] In addition, the terms "first", "second", "third", "fourth", "fifth", "sixth", "seventh" and "eighth" are only used for descriptive purposes and are not to be construed as indicating or implying relative importance or an indicated number of technical features. Therefore, the features defined with "first", "second", "third", "fourth", "fifth", "sixth", "seventh" and "eighth" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "several" is two or more than two, unless otherwise specifically limited.

[0051] The technical scope of the present application is not limited to the above description, and those skilled in the art can make various modifications and changes to the above embodiments without departing from the technical concept of the present application, and these modifications and changes should all be within the protection scope of the present application.

Claims

1. A base for converting increased driving wheel grip force and a wheelchair thereof, characterized in that: a chassis frame (1) is provided, two side ends of the chassis frame (1) are rotatably connected with a left front longitudinal conversion rod (8) and a right front longitudinal conversion rod (11), one end of the left front longitudinal conversion rod (8) is connected with a left front wheel (7), the other end of the left front longitudinal conversion rod (8) is rotatably connected with a left connecting assembly (6), and the connection position of the left front longitudinal conversion rod (8) and the left connecting assembly (6) is connected with the chassis frame (1), the inner side of the left connecting assembly (6) is provided with a left driving wheel (5), and a spiral spring two (9) is movably connected between the left connecting assembly (6) and the left front longitudinal conversion rod (8); the other side of the left connecting assembly (6) is movably connected with a left rear longitudinal conversion rod (4), and the end of the left rear longitudinal conversion rod (4) is connected with a left rear wheel (3); one end of the right front longitudinal conversion rod (11) is connected with a right front wheel (10), the other end of the right front longitudinal conversion rod (11) is rotatably connected with a right connecting assembly (13), and the connection position of the right front longitudinal conversion rod (11) and the right connecting assembly (13) is connected with the chassis frame (1), the inner side of the right connecting assembly (13) is provided with a right driving wheel (14), and a spiral spring three (12) is movably connected between the right connecting assembly (13) and the right front longitudinal conversion rod (11); the other side of the right connecting assembly (13) is movably connected with a right rear longitudinal conversion rod (15), and the end of the right rear longitudinal conversion rod (15) is connected with a right rear wheel (16); the left rear longitudinal conversion rod (4) and the right rear longitudinal conversion rod (15) are movably connected with a transverse conversion assembly (2).

2. The base and wheelchair of claim 1, wherein: the transverse conversion assembly (2) comprises a left linkage assembly (21), a spiral spring one (22) and a right linkage assembly (23); one end of the left linkage assembly (21) is connected with the chassis frame (1), and the side of the left linkage assembly (21) is connected with the left rear longitudinal conversion rod (4); the other end of the left linkage assembly (21) is rotatably connected with the right linkage assembly (23), and the rotation connection position of the left linkage assembly (21) and the right linkage assembly (23) is connected with the chassis frame (1); one end of the right linkage assembly (23) is connected with the chassis frame (1), and the side of the right linkage assembly (23) is connected with the right rear longitudinal conversion rod (15); the left linkage assembly (21) and the right linkage assembly (23) are connected through the spiral spring one (22).

3. The base and wheelchair of claim 2, wherein: The left linkage assembly (21) and the right linkage assembly (23) are the same structure, and the left linkage assembly (21) comprises a crossbar (211), a rotating rod (213) and a conversion pull rod (212); the crossbar (211) is rotatably connected with the right linkage assembly (23), and the connection part of the crossbar (211) and the right linkage assembly (23) is connected with the chassis frame (1); the other end of the crossbar (211) is rotatably connected with the conversion pull rod (212), and the other end of the conversion pull rod (212) is movably connected with the rotating rod (213); the other end of the rotating rod (213) is connected with the chassis frame (1), and the side of the rotating rod (213) is connected with the left rear longitudinal conversion rod (4).

4. The base and wheelchair of claim 3, wherein: The two ends of the conversion pull rod (212) form joint bearings, one of which is rotatably connected with the crossbar (211), and the other is rotatably connected with the rotating rod (213).

5. The base and wheelchair of claim 4, wherein: The left connection assembly (6) and the right connection assembly (13) are the same structure, and the left connection assembly (6) comprises a left rear support rod (61), an outer shell (62) and a left front support rod (63); the inner side of the outer shell (62) is provided with a left drive wheel (5), the side of the outer shell (62) is fixed with the left front support rod (63), the left front support rod (63) is rotatably connected with the left front longitudinal conversion rod (8) and the connection part thereof is connected with the chassis frame (1), the left front longitudinal conversion rod (8) and the left front support rod (63) are movably connected with the second spiral spring (9); the other side of the outer shell (62) is connected with the left rear support rod (61), and the left rear support rod (61) is connected with the left rear longitudinal conversion rod (4); the left rear longitudinal conversion rod (4) is connected with the rotating rod (213).

6. The base and wheelchair of claim 1, wherein: The diameter of the left drive wheel (5) is greater than that of the left front wheel (7) and the left rear wheel (3), and the diameter of the right drive wheel (14) is greater than that of the right front wheel (10) and the right rear wheel (16); the left drive wheel (5) and / or the right drive wheel (14) is connected with a driving mechanism.

7. A wheelchair characterized by The base and wheelchair comprising the conversion increasing driving wheel grip force base of any one of claims 1-6; the top of the base is provided with a support assembly (18) at four corners, and the top of the support assembly (18) is connected with a seat assembly (17); the side of the seat assembly (17) is rotatably connected with a foot pedal (19).

8. A wheelchair according to claim 7, characterised in that: The support assembly (18) comprises an outer sleeve rod (181) and an inner plug rod (182); the top of the chassis frame (1) is upwardly extended to form the outer sleeve rod (181) at four corners, and the inner plug rod (182) is inserted into the inner part of the outer sleeve rod (181); the seat assembly (17) is arranged at the top of the inner plug rod (182); and a bolt is arranged between the inner plug rod (182) and the outer sleeve rod (181).

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