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

Abstract

The base comprises a chassis frame, the ends 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 invention relates to the technical field of wheelchair equipment, in particular to a base for converting and increasing the gripping force of a driving wheel and a wheelchair thereof. Background Art

[0002] Wheelchairs provide important travel and living convenience for people with limited mobility, helping them improve their ability to take care of themselves and their social participation. In the existing wheelchair chassis design, the wheels are generally rigidly fixed on a plane, including scooters and folding wheelchairs. When the wheelchair is traveling on an uneven or uneven ground, the lower wheel will be suspended and lose its grip on the opposite side. There are also designs with spiral springs installed on the wheels for shock absorption. Because the wheelchair is small in size, the springs used are also very small, and the corresponding shock absorption stroke is also very small. In fact, the shock absorption and torsion elimination effect is minimal. When driving on a slightly uneven ground, it is still difficult to pass. Summary of the invention

[0003] In view of the deficiencies in the prior art, the present invention aims to provide a base and a wheelchair for converting and increasing the gripping force of the driving wheels, which can solve the existing problems.

[0004] In order to achieve the above object, the technical solution of the present invention is as follows:

[0005] The present invention is realized through the following technical scheme: a base and a wheelchair thereof for converting and increasing the gripping force of a driving wheel, comprising a chassis frame, both side ends of the chassis frame are rotatably connected to a left front longitudinal conversion rod and a right front longitudinal conversion rod, one end of the left front longitudinal conversion rod is connected to a left front wheel, the other end of the left front longitudinal conversion rod is rotatably connected to a left connecting assembly, and the connection between the left front longitudinal conversion rod and the left connecting assembly is connected to the chassis frame, a left driving wheel is installed on the inner side of the left connecting assembly, and a coil spring 2 is movably connected between the left connecting assembly and the left front longitudinal conversion rod; the other side of the left connecting assembly is movably connected to a left rear longitudinal conversion rod, and the end of the left rear longitudinal conversion rod is connected to a left rear wheel;

[0006] One end of the right front longitudinal conversion rod is connected to the right front wheel, the other end of the right front longitudinal conversion rod is rotatably connected to the right connecting assembly, and the connection between the right front longitudinal conversion rod and the right connecting assembly is connected to the chassis frame, the right driving wheel is installed on the inner side of the right connecting assembly, and a coil spring three is movably connected between the right connecting assembly and the right front longitudinal conversion rod; the other side of the right connecting assembly is movably connected to the right rear longitudinal conversion rod, and the end of the right rear longitudinal conversion rod is connected to the right rear wheel;

[0007] The left rear longitudinal conversion rod and the right rear longitudinal conversion rod are movably connected to a transverse conversion assembly.

[0008] Furthermore, the lateral conversion component includes a left linkage component, a coil spring 1 and a right linkage component; one end of the left linkage component is connected to the chassis frame, and the side of the left linkage component is connected to the left rear longitudinal conversion rod; the other end of the left linkage component is rotatably connected to the right linkage component, and the rotation connection point of the left linkage component and the right linkage component is connected to the chassis frame; one end of the right linkage component is connected to the chassis frame, and the side of the right linkage component is connected to the right rear longitudinal conversion rod; the left linkage component and the right linkage component are connected via a coil spring 1.

[0009] Furthermore, the left linkage assembly has the same structure as the right linkage assembly, and the left linkage assembly includes a cross bar, a rotating rod and a conversion rod; the cross bar is rotatably connected to the right linkage assembly, and the connection between the cross bar and the right linkage assembly is connected to the chassis frame; the other end of the cross bar is rotatably connected to the conversion rod, and the other end of the conversion 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] Furthermore, joint bearings are formed at both ends of the conversion pull rod, one of the joint bearings is rotatably connected to the cross bar, and the other joint bearing is rotatably connected to the rotating rod.

[0011] Furthermore, the left connecting component has the same structure as the right connecting component, and the left connecting component includes a left rear support rod, an outer protective shell and a left front support rod; a left driving wheel is installed on the inner side of the outer protective shell, a left front support rod is fixed to the side of the outer protective shell, and the left front support rod is rotatably connected to the left front longitudinal conversion rod and the connection between the two is connected to the chassis frame, and a coil spring two is movably connected between the left front longitudinal conversion rod and the left front support rod; the other side of the outer protective 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] Furthermore, the diameter of the left driving wheel is larger than the left front wheel and the left rear wheel, and the diameter of the right driving wheel is larger than the right front wheel and the right rear wheel; the left driving wheel and / or the right driving wheel are connected to a driving mechanism.

[0013] A wheelchair, comprising a base for increasing the grip of a driving wheel as described in any one of the above; support components are formed at the four corners of the top of the base, and the top of the support component is connected to a seat assembly; the side of the seat assembly is rotatably connected to a foot pedal.

[0014] Furthermore, the support assembly includes an outer rod and an inner rod; the four corners of the top end of the chassis frame extend upward to form an outer rod, and an inner rod is inserted into the inner part of the outer rod; a seat assembly is provided at the top end of the inner rod; and a bolt is provided between the inner rod and the outer rod.

[0015] Compared with the prior art, the beneficial effects of the present invention include:

[0016] The present invention is provided with a lateral switching component. When the front wheel and driving wheel or the rear wheel and driving wheel on any side of the base are raised at the same time, or the rear wheel on only one side is raised, the lateral switching component can be used for switching, thereby avoiding reducing the load on the driving wheel on the other side and the ground grip, and preventing the vehicle body from tipping over.

[0017] The base and wheelchair of the present invention are interconnected, and the six wheels of the base of the present invention are interconnected, so that the load of the large driving wheel in the middle of the six-wheeled wheelchair is doubled, that is, the gripping driving force of the large driving wheel is doubled, and the gripping driving force of the driving wheel will not change in any posture of the wheelchair on the uneven ground. A common coil spring is arranged inside the lateral conversion component and between the front wheel and the driving wheel, so that the wheelchair can be shock-absorbed as a whole, each set of double wheels can be shock-absorbed synchronously, and the single wheel can be shock-absorbed independently; because they are interconnected as a whole, any single wheel, double wheel or three wheels can be driven higher or lower synchronously, and the ground support gripping force of any other wheel will not be affected; the single wheel obstacle climbing causes the wheelchair to tilt, which is only one-fourth of the tilt angle of the existing wheelchair in the society, that is, the bump is reduced by four times. When each wheel climbs over obstacles, the load will not gradually increase as the wheel gradually rises. Compared with the existing wheelchair in the society, on the contrary, it will gradually reduce. This shows that this six-wheel interconnected wheelchair is smoother and safer off-road, faster and easier, and greatly improves the rapid passing ability of the wheelchair. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The disclosure of the present invention is described with reference to the accompanying 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 present invention. In the drawings, the same reference numerals are used to refer to the same components. Among them:

[0019] Figure 1 A schematic diagram of the overall exploded structure of a base for increasing the gripping force of a driving wheel and a wheelchair thereof according to the present invention;

[0020] Figure 2 This is a schematic structural diagram of the overall assembly of a base for increasing the gripping force of the driving wheels and a wheelchair according to an embodiment of the present invention;

[0021] Figure 3 It is a schematic diagram of the top view of the overall assembled structure of the implementation case of the present invention;

[0022] Figure 4 This is a schematic diagram of the overall structure of a wheelchair in an implementation example of the present invention;

[0023] Figure 5 This is an implementation case of the present invention Figure 4 The enlarged structural diagram at A in the middle;

[0024] Figure 6 This is a structural schematic diagram of an implementation example 1 of the present invention;

[0025] Figure 7 This is a structural schematic diagram of a second implementation example of the present invention;

[0026] Figure 8 This is a structural schematic diagram of the third implementation case of the present invention;

[0027] Fig. 9 This is a structural schematic diagram of a fourth embodiment of the present invention;

[0028] Fig.10 This is a structural schematic diagram of implementation case 5 of the present invention.

[0029] Explanations in the figure: 1. chassis frame; 2. lateral conversion assembly; 21. left linkage assembly; 211. crossbar; 212. conversion rod; 213. rotating rod; 22. coil 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 shell; 63. left front support rod; 7. left front wheel; 8. left front longitudinal conversion rod; 9. coil spring two; 10. right front wheel; 11. right front longitudinal conversion rod; 12. coil 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 rod; 182. inner rod; 19. pedal. DETAILED DESCRIPTION

[0030] It is easy to understand that according to the technical solution of the present invention, without changing the essential spirit of the present invention, a person skilled in the art can propose a variety of interchangeable structural modes and implementation modes. Therefore, the following specific implementation modes and drawings are only exemplary descriptions of the technical solution of the present invention, and should not be regarded as the whole of the present invention or as a limitation or restriction to the technical solution of the present invention.

[0031] A base and a wheelchair for converting and increasing the grip of a driving wheel, exemplarily, as Figure 1-Figure 3As shown, it includes a chassis frame 1, and the two side ends of the chassis frame 1 are rotatably connected to the left front longitudinal conversion rod 8 and the right front longitudinal conversion rod 11, one end of the left front longitudinal conversion rod 8 is connected to the left front wheel 7, and the other end of the left front longitudinal conversion rod 8 is rotatably connected to the left connecting component 6, and the connection between the left front longitudinal conversion rod 8 and the left connecting component 6 is connected to the chassis frame 1, and the left driving wheel 5 is installed on the inner side of the left connecting component 6, and a coil spring 2 9 is movably connected between the left connecting component 6 and the left front longitudinal conversion rod 8; the other side of the left connecting component 6 is movably connected to the left rear longitudinal conversion rod 4, and the end of the left rear longitudinal conversion rod 4 is connected to the left rear wheel 3;

[0032] Specifically, the left connecting assembly 6 includes a left rear support rod 61, an outer protective shell 62 and a left front support rod 63; a left driving wheel 5 is installed on the inner side of the outer protective shell 62, a left front support rod 63 is fixed to the side of the outer protective shell 62, and the left front support rod 63 is rotatably connected to the left front longitudinal conversion rod 8 and the connection between the two is connected to the chassis frame 1, and a coil spring 29 is movably connected between the left front longitudinal conversion rod 8 and the left front support rod 63; the other side of the outer protective shell 62 is connected to the left rear support rod 61, and the left rear support rod 61 is connected to the left rear longitudinal conversion rod 4.

[0033] One end of the right front longitudinal conversion rod 11 is connected to the right front wheel 10, and the other end of the right front longitudinal conversion rod 11 is rotatably connected to the right connecting component 13, and the connection between the right front longitudinal conversion rod 11 and the right connecting component 13 is connected to the chassis frame 1, and a right driving wheel 14 is installed on the inner side of the right connecting component 13, and a coil spring three 12 is movably connected between the right connecting component 13 and the right front longitudinal conversion rod 11; the other side of the right connecting component 13 is movably connected to the right rear longitudinal conversion rod 15, and the end of the right rear longitudinal conversion rod 15 is connected to the right rear wheel 16; the right connecting component 13 has the same structure as the left connecting component 6, and the connection relationship between the right connecting component 13 and the right front longitudinal conversion rod 11 and the right rear longitudinal conversion rod 15 is the same as the connection relationship between the left connecting component 6 and the left front longitudinal conversion rod 8 and 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 to the transverse conversion assembly 2. Specifically, the transverse conversion assembly 2 includes a left linkage assembly 21, a coil spring 22 and a right linkage assembly 23; one end of the left linkage assembly 21 is connected to the chassis frame 1, and the side of the left linkage assembly 21 is connected to the left rear longitudinal conversion rod 4; the other end of the left linkage assembly 21 is rotatably connected to the right linkage assembly 23, and the rotation connection point between the left linkage assembly 21 and the right linkage assembly 23 is connected to the chassis frame 1; one end of the right linkage assembly 23 is connected to the chassis frame 1, and the side of the right linkage assembly 23 is connected to the right rear longitudinal conversion rod 15; the left linkage assembly 21 and the right linkage assembly 23 are connected through the coil spring 22.

[0035] Specifically, the left linkage assembly 21 has the same structure as the right linkage assembly 23, and the left linkage assembly 21 includes a cross bar 211, a rotating rod 213 and a conversion rod 212; the cross bar 211 is rotationally connected to the right linkage assembly 23, and the rotational connection between the cross bar 211 and the right linkage assembly 23 is connected to the chassis frame 1; the other end of the cross bar 211 is rotationally connected to the conversion rod 212, and the other end of the conversion rod 212 is movably connected to the rotating rod 213; the other end of the rotating rod 213 is connected to the chassis frame 1, and the side of the rotating rod 213 is connected to the left rear longitudinal conversion rod 4; the middle of the left rear longitudinal conversion rod 4 is connected to the rotating rod 213, and one end of the left rear longitudinal conversion rod 4 is connected to the left rear support rod 61, and the other end is connected to the left rear wheel 3.

[0036] Both ends of the conversion rod 212 form joint bearings, one of which is rotatably connected to the cross bar 211 , and the other joint bearing is rotatably connected to the rotating rod 213 .

[0037] The diameter of the left driving wheel 5 is larger than the left front wheel 7 and the left rear wheel 3, and the diameter of the right driving wheel 14 is larger than the right front wheel 10 and the right rear wheel 16; the left driving wheel 5 and / or the right driving wheel 14 are connected to 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 a prior art, and is exemplary. The driving mechanism generally includes a battery, a controller and a motor. The battery-powered electric wheelchair usually uses a lead-acid battery or a lithium battery. These batteries can store electrical energy and provide a power source for the operation of the wheelchair. The controller is the "brain" of the electric wheelchair. It receives signals from input devices such as joysticks, and controls the magnitude and direction of the current output by the battery to the motor according to these signals. The motor is the power actuator of the electric wheelchair and works under the action of the battery and the controller. When the controller transmits the electrical energy output by the battery to the motor, the coil inside the motor is acted upon by the Ampere force in the magnetic field, generating a rotational torque, thereby driving the motor's shaft to rotate, so that the wheelchair can move forward, backward, turn, and so on.

[0038] The base of the present invention is applied to a wheelchair, but is not limited thereto. The base of the present invention is applied to a wheelchair as an example for explanation; Figure 4 and Figure 5 As shown, a wheelchair includes the base for converting and increasing the grip of the driving wheels and the wheelchair; support components 18 are formed at the four corners of the top of the base, and the top of the support component 18 is connected to the seat assembly 17; the side of the seat assembly 17 is rotatably connected to the foot pedal 19.

[0039] The support assembly 18 includes an outer rod 181 and an inner rod 182; the outer rod 181 is formed by extending upward from the four corners of the top of the chassis frame 1, and the left linkage assembly 21 and the right linkage assembly 23 are connected to the outer rod 181 by a connecting rod, or can be directly connected by connecting rods extending outward from the chassis frame 1; the inner rod 182 is inserted into the inner part of the outer rod 181; the seat assembly 17 is arranged at the top of the inner rod 182; and bolts are arranged between the inner rod 182 and the outer rod 181. The support assembly 18 is used to adjust the height of the seat assembly 17, and the bottom end of the footrest 19 is provided with wheels for easy movement.

[0040] When the present invention is used, in the first embodiment, when passing through a flat road, as shown in FIG. Figure 6 As shown, each wheel is in contact with the ground and the force is stable. The ground support grip of any wheel will not be affected in any way, and the wheelchair can travel smoothly.

[0041] Implementation case 2: When the front and rear wheels of the entire wheelchair pass over the raised ground, Figure 7 As shown, taking the right side of the wheelchair as an example, at this time, the right front wheel 10 and the right rear wheel 16 rise due to the protrusion, and the right front longitudinal conversion rod 11 rotates due to the rise of the right front wheel 10. At this time, the coil spring three 12 is in a compressed state, and the elastic force of the coil spring three 12 acts on the right connecting component 13, thereby applying force to the right driving wheel 14. When the right rear wheel 16 rises due to the protrusion, it can drive the rotating rod 213 of the right linkage component 23 to rotate through the right rear longitudinal conversion rod 15, so that the right linkage component 23 rises and rotates to compress the coil spring one 22; the coil spring one 22 applies force to the left rear longitudinal conversion rod 4 through the left linkage component 21, so as to avoid the front and rear wheels from rising and reducing the driving wheel load and ground grip; keep the vehicle stable, and greatly reduce shock through the coil spring.

[0042] Implementation case 3: When the front wheelchair passes over the raised ground, take the right side of the wheelchair as an example. Figure 8As shown, at this time, the right front wheel 10 rises due to the bulge, and the right front longitudinal conversion rod 11 rotates due to the rise of the right front wheel 10. At this time, the coil spring three 12 is in a compressed state, and the right connecting assembly 13 is pressed downward, so that the right driving wheel 14 is stressed, avoiding the front wheel rising to reduce the driving wheel load and ground grip, and not affecting the wheel grip.

[0043] Implementation Case 4: When the front wheels and driving wheels of the entire wheelchair pass over the raised ground, Fig. 9 As shown, taking the right side of the wheelchair as an example, at this time, the right front wheel 10 and the right driving wheel 14 rise due to the protrusion, and the right driving wheel 14 drives the right connecting assembly 13 to rise when rising, and drives the right rear longitudinal conversion rod 15 to rotate, so that the right linkage assembly 23 is forced to rotate downward, and the coil spring 1 22 is stretched to buffer the vibration when passing the protrusion, so as to prevent the front wheel and the driving wheel from rising and reducing the load on the other side of the driving wheel and the ground grip.

[0044] Implementation Example 5: When the left front wheel 7 of the entire wheelchair passes through a protrusion, the right front wheel 10 and the right driving wheel 14 pass through a depression, and the right rear wheel 16 passes through a protrusion, Fig.10 As shown, the left front wheel 7 drives the left front longitudinal conversion rod 8 to rotate, thereby compressing the coil spring 29; when the right rear wheel 16 rises due to the protrusion, it can drive the rotating rod 213 of the right linkage assembly 23 to rotate through the right rear longitudinal conversion rod 15, so that the right linkage assembly 23 rises and rotates to compress the coil spring 1 22; the coil spring 1 22 applies force to the left rear longitudinal conversion rod 4 through the left linkage assembly 21, and through the lateral conversion assembly 2, it does not affect the supporting grip of the drive wheel, keeps the vehicle stable, and performs significant shock absorption.

[0045] From the above implementation cases, it can be seen that when the front wheel and the driving wheel on either side are raised at the same time, they can be converted through the lateral conversion component to avoid reducing the load on the driving wheel on the other side and the ground grip; when the driving wheel and the rear wheel on either side, or the rear wheel on either side is raised, they can be raised through the conversion component to avoid reducing the load on the driving wheel on the other side and the ground grip. Therefore, if there is no conversion of the lateral conversion component, when the front middle wheels and / or the rear middle wheels on either side are raised at the same time, the vehicle body will easily tilt, resulting in a reduction in the load on the driving wheel on the other side and the ground grip; or the universal wheels on both sides at the back, raising either side will also reduce the grip of the driving wheel on the other side.

[0046] The base and wheelchair of the present invention are characterized in that a lateral conversion assembly is arranged on the rear side of the base and the lateral conversion assembly is connected to the rear wheels through a conversion rod, the left rear wheel is connected to the left rear longitudinal conversion rod, the left rear longitudinal conversion rod is movably connected to the left connecting assembly on the outer side of the left driving wheel; the right rear wheel is connected to the right rear longitudinal conversion rod, the right rear longitudinal conversion rod is movably connected to the right connecting assembly on the outer side of the right driving wheel, the right connecting assembly on the outer side of the right driving wheel is movably connected to the right front longitudinal conversion rod, and the right front longitudinal conversion rod is connected to the right front wheel; the left connecting assembly on the outer side of the left driving wheel is movably connected to the left front longitudinal conversion rod, and the left front longitudinal conversion rod is connected to the left connecting assembly of the left front wheel, which are movably connected respectively.

[0047] The six wheels of the base of the present invention are interconnected, so that the load of the large driving wheel in the middle of the six-wheeled wheelchair is doubled, that is, the gripping driving force of the large driving wheel is doubled, and the gripping driving force of the driving wheel will not change in any posture of the wheelchair on the uneven ground. A common coil spring is arranged inside the lateral conversion assembly and between the front wheel and the driving wheel, so that the wheelchair can achieve a large shock reduction as a whole, each set of double wheels can achieve synchronous shock reduction, and the single wheel can achieve independent shock reduction; because they are interconnected as a whole, any single wheel, double wheel or three wheels can be driven higher or lower synchronously, which will not have any effect on the ground support gripping force of any other wheel; the single wheel obstacle rise causes the wheelchair to tilt, which is only one-fourth of the tilt angle of the existing wheelchair in society, that is, the bump is reduced by four times. When each wheel climbs over obstacles, the load will not gradually increase as the wheel gradually rises. Compared with the existing wheelchair in society, on the contrary, it will gradually reduce. This shows that this six-wheel interconnected wheelchair is smoother and safer off-road, faster and easier, and greatly improves the rapid passing ability of the wheelchair.

[0048] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0049] In the description of this patent, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "set" should be understood in a broad sense, for example, it can be fixedly connected or set, or it can be detachably connected or set, or connected or set in one piece. For ordinary technicians in this field, the specific meanings of the above terms in this patent can be understood according to specific circumstances.

[0050] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "several" is two or more, unless otherwise clearly and specifically defined.

[0051] The technical scope of the present invention is not limited to the contents in the above description. Those skilled in the art can make various deformations and modifications to the above embodiments without departing from the technical idea of ​​the present invention, and these deformations and modifications should all fall within the protection scope of the present invention.

Claims

1. A base for converting and increasing the grip of driving wheels and a wheelchair thereof, characterized in that: The invention comprises a chassis frame (1), the two side ends of the chassis frame (1) are rotatably connected to 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 to a left front wheel (7), the other end of the left front longitudinal conversion rod (8) is rotatably connected to a left connecting component (6), and the connection between the left front longitudinal conversion rod (8) and the left connecting component (6) is connected to the chassis frame (1), a left driving wheel (5) is installed on the inner side of the left connecting component (6), and a coil spring 2 (9) is movably connected between the left connecting component (6) and the left front longitudinal conversion rod (8); the other side of the left connecting component (6) is movably connected to a left rear longitudinal conversion rod (4), and the end of the left rear longitudinal conversion rod (4) is connected to a left rear wheel (3); One end of the right front longitudinal conversion rod (11) is connected to the right front wheel (10), and the other end of the right front longitudinal conversion rod (11) is rotatably connected to the right connecting assembly (13), and the connection between the right front longitudinal conversion rod (11) and the right connecting assembly (13) is connected to the chassis frame (1), and a right driving wheel (14) is installed on the inner side of the right connecting assembly (13), and a coil 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 to the right rear longitudinal conversion rod (15), and the end of the right rear longitudinal conversion rod (15) is connected to the right rear wheel (16); The left rear longitudinal conversion rod (4) and the right rear longitudinal conversion rod (15) are movably connected to the transverse conversion assembly (2).

2. A base and a wheelchair for converting and increasing the gripping force of driving wheels according to claim 1, characterized in that: The lateral conversion component (2) comprises a left linkage component (21), a coil spring (22) and a right linkage component (23); one end of the left linkage component (21) is connected to the chassis frame (1), and the side of the left linkage component (21) is connected to the left rear longitudinal conversion rod (4); the other end of the left linkage component (21) is rotatably connected to the right linkage component (23), and the rotation connection point between the left linkage component (21) and the right linkage component (23) is connected to the chassis frame (1); one end of the right linkage component (23) is connected to the chassis frame (1), and the side of the right linkage component (23) is connected to the right rear longitudinal conversion rod (15); the left linkage component (21) and the right linkage component (23) are connected via the coil spring (22).

3. A base and a wheelchair for converting and increasing the gripping force of driving wheels according to claim 2, characterized in that: The left linkage assembly (21) and the right linkage assembly (23) have the same structure, and the left linkage assembly (21) comprises a cross bar (211), a rotating rod (213) and a conversion rod (212); the cross bar (211) is rotationally connected to the right linkage assembly (23), and the connection between the cross bar (211) and the right linkage assembly (23) is connected to the chassis frame (1); the other end of the cross bar (211) is rotationally connected to the conversion rod (212), and the other end of the conversion rod (212) is movably connected to the rotating rod (213); the other end of the rotating rod (213) is connected to the chassis frame (1), and the side of the rotating rod (213) is connected to the left rear longitudinal conversion rod (4).

4. A base for converting and increasing the gripping force of driving wheels and a wheelchair thereof according to claim 3, characterized in that: Joint bearings are formed at both ends of the conversion pull rod (212), one of the joint bearings is rotatably connected to the cross bar (211), and the other joint bearing is rotatably connected to the rotating rod (213).

5. A base for converting and increasing the gripping force of driving wheels and a wheelchair thereof according to claim 4, characterized in that: The left connecting component (6) has the same structure as the right connecting component (13), and the left connecting component (6) comprises a left rear support rod (61), an outer protective shell (62) and a left front support rod (63); a left driving wheel (5) is installed inside the outer protective shell (62), a left front support rod (63) is fixed to the side of the outer protective shell (62), and the left front support rod (63) is rotatably connected to the left front longitudinal conversion rod (8) and the connection between the two is connected to the chassis frame (1), and a coil spring 2 (9) is movably connected between the left front longitudinal conversion rod (8) and the left front support rod (63); the other side of the outer protective shell (62) is connected to the left rear support rod (61), and the left rear support rod (61) is connected to the left rear longitudinal conversion rod (4); the left rear longitudinal conversion rod (4) is connected to the rotating rod (213).

6. The base for converting and increasing the gripping force of the driving wheels and the wheelchair thereof according to claim 1, characterized in that: The diameter of the left driving wheel (5) is larger than the left front wheel (7) and the left rear wheel (3), and the diameter of the right driving wheel (14) is larger than the right front wheel (10) and the right rear wheel (16); the left driving wheel (5) and / or the right driving wheel (14) are connected to a driving mechanism.

7. A wheelchair, characterized in that: It comprises a base and a wheelchair thereof for converting and increasing the grip of the driving wheels as described in any one of claims 1 to 6; support components (18) are formed at the four corners of the top of the base, and the top of the support component (18) is connected to the seat assembly (17); the side of the seat assembly (17) is rotatably connected to the foot pedal (19).

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

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