Torsion eliminating base and wheelchair with same

Abstract

The invention relates to the technical field of wheelchairs, and discloses a torsion-eliminating base and a wheelchair thereof.The two sides of a wheelchair frame are provided with first pin shafts, the front side of the wheelchair frame is provided with a second pin shaft, the top of the wheelchair frame is provided with an installation supporting piece, and a unique structure is formed by connecting a longitudinal large rocker arm, a longitudinal front small rocker arm, a longitudinal rear small rocker arm, a connecting rod, a front side transverse conversion rocker arm and the like; according to the working principle, when the vehicle runs on the concave-convex ground, all components cooperate, and the positions of the wheels are adjusted according to terrain changes. The wheelchair has remarkable advantages, the six wheels are connected, the driving stability is greatly improved, and the inclination angle is only one fourth of that of a traditional wheelchair; the obstacle crossing ability is strong, the wheel lifting load is reduced, and obstacle crossing is easier and faster; the self-adaptive terrain capability is achieved, the supporting force and the position of the wheels can be automatically adjusted according to the ground condition, and the better travel experience is provided for the disabled.

Description

Technical Field

[0001] The present invention relates to the technical field of wheelchairs, and in particular to a torsion-eliminating base and a wheelchair thereof. Background Art

[0002] In today's society, wheelchairs are important mobility aids that provide mobility-impaired people with the possibility of travel. However, existing wheelchair designs have many defects. Currently, most wheelchair wheels are fixed, with all wheels on the same plane. When driving on uneven ground, the wheels at the lower part of the wheelchair will face the problem of insufficient ground support and grip, and in severe cases, the wheels may even be suspended in the air. This not only greatly affects the riding experience of wheelchair users, but may also lead to safety hazards. For example, on complex road conditions such as slopes, the suspended wheels can easily cause the wheelchair to lose balance, leading to dangerous situations such as rollovers.

[0003] Some wheelchairs try to improve the shock absorption and torsion elimination effects by installing coil springs. However, due to the relatively small size of the wheelchair itself, the size of the spring used is also limited, resulting in a very limited shock absorption and torsion elimination stroke. When facing a slightly uneven ground, this tiny shock absorption and torsion elimination effect is almost negligible, and the wheelchair still has difficulty passing smoothly, which seriously restricts the use of wheelchairs in complex terrain.

[0004] The reason is that the rigid structure of existing wheelchairs makes the wheels lack effective coordination and self-adaptation, and cannot automatically adjust the support force and position of each wheel according to the ground conditions. The single shock absorption method is also difficult to cope with the challenges of diverse road conditions. Therefore, a new wheelchair design is urgently needed to solve these problems and improve the performance and safety of wheelchairs in complex terrain. Summary of the invention

[0005] In order to solve the technical problems existing in the background technology, the present invention proposes a torsion-eliminating base and a wheelchair thereof.

[0006] The present invention provides a torsion-eliminating base and a wheelchair thereof, comprising:

[0007] A wheelchair frame, wherein a first transverse pin is disposed at the center of the lower part of both sides of the wheelchair frame, a second longitudinal pin is disposed at the center of the upper part of the front side, and a plurality of mounting support members are mounted on the top side;

[0008] Two groups of longitudinal large rocker arms, the two groups of the first pins are respectively rotatably connected to the middle parts of the two groups of longitudinal large rocker arms, the front end of the longitudinal large rocker arms is longitudinally provided with a third pin, and the side walls at both ends thereof are transversely provided with a fourth pin and a fifth pin from front to rear respectively;

[0009] Two groups of longitudinal front small rocker arms, the two groups of fourth pins are rotatably connected to the middle parts of the two groups of longitudinal front small rocker arms respectively, and the front ends of the longitudinal front small rocker arms are equipped with front universal wheels;

[0010] Two groups of longitudinal rear small rocker arms, the two groups of fifth pins are rotatably connected to the middle parts of the two groups of longitudinal rear small rocker arms respectively, and the rear ends of the longitudinal rear small rocker arms are equipped with rear universal wheels;

[0011] Two groups of connecting rods, one end of the longitudinal front small rocker arm and one end of the longitudinal rear small rocker arm located on the same side are connected by a connecting rod, one end of the connecting rod is hinged to one end of the longitudinal front small rocker arm, and the other end is hinged to one end of the longitudinal rear small rocker arm; the parts of the two groups of longitudinal front small rockers close to the connecting rod are equipped with a driving motor and a longitudinal large driving wheel, and the driving motor is used to drive the longitudinal large driving wheel to rotate;

[0012] A group of front lateral conversion rocker arms, the second pin shaft is rotatably connected to the middle part of the front lateral conversion rocker arm, both ends of the front lateral conversion rocker arm are rotatably connected to conversion connecting rods, and the other ends of the two groups of conversion connecting rods are respectively rotatably connected to the third pin shafts on the same side;

[0013] A seat is mounted on an upper portion of a mounting support on the top side of a wheelchair frame.

[0014] Preferably, the wheelchair frame is composed of two groups of U-shaped support frames, each U-shaped support frame is composed of a group of transverse supports and two groups of longitudinal supports; the two groups of longitudinal supports are arranged in parallel and are respectively connected to the same side of the two ends of the transverse supports; the two groups of U-shaped support frames are distributed up and down, and the planes on which they are located are parallel to each other; the middle parts of the two groups of transverse supports are vertically connected by a first connecting frame, and the ends of the transverse supports directly facing each other up and down of the two groups of U-shaped support frames are longitudinally connected by a second connecting frame.

[0015] Preferably, the driving motor and the large longitudinal driving wheel are connected via a transmission belt or chain, and a protective shell is provided outside the transmission structure to prevent debris from entering the transmission structure and affecting the transmission effect.

[0016] Preferably, the seat comprises a seat cushion, a backrest and armrests, the seat cushion and the backrest are filled with elastic sponges, and the surface of the armrests is provided with an anti-slip rubber layer.

[0017] Preferably, the two groups of longitudinal large driving wheels are both provided with brake devices, and the brake devices can be controlled by a manual operating lever and an electric control device.

[0018] Preferably, it also includes a controller and a battery, wherein the controller is electrically connected to the drive motor and is used to control the speed and direction of the drive motor; the battery supplies power to the drive motor and the controller, and the battery is installed inside the wheelchair frame; the manual operating lever and the electric control device are installed on the armrest.

[0019] Preferably, a storage basket is provided on the seat for storing items.

[0020] The torque-eliminating base and wheelchair thereof proposed in the present invention have significant advantages over the prior art.

[0021] Driving stability: The six-wheeled wheelchair of the present invention realizes the interconnection of six wheels through a unique structural design. When driving on uneven ground with large differences in bumps and depressions, any single-wheel, double-wheel or three-wheel synchronous lifting and lowering of obstacles will not affect the ground support and grip of other wheels. Compared with existing wheelchairs in society, when the wheelchair of the present invention is tilted due to the raising or lowering of a single wheel, the tilt angle is only one-fourth of that of existing wheelchairs, which greatly improves the stability during driving, greatly improves the user's riding experience, and reduces the discomfort and safety hazards caused by bumps and tilts.

[0022] Obstacle-crossing capability: When each wheel is climbing and crossing obstacles, the load will not gradually increase as the wheel rises. On the contrary, unlike existing wheelchairs, the load will be reduced as the wheel rises. This makes the wheelchair smoother, easier and faster in the process of crossing obstacles, and significantly improves the wheelchair's ability to quickly pass through complex terrain. Whether facing small potholes or larger obstacles, the wheelchair of the present invention can easily cope with them, providing a larger range of activities and travel convenience for people with limited mobility.

[0023] Adaptive terrain capability: The unique anti-torsion base structure enables the wheelchair to automatically adjust the position and support force of each wheel according to the ground conditions, achieving adaptive adaptation to complex terrain. This adaptive capability not only improves the wheelchair's passability, but also reduces the physical requirements for the user, allowing the user to more easily control the wheelchair on different terrains.

[0024] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the structure of the present invention;

[0026] Figure 2 It is a structural schematic diagram of the base in the present invention;

[0027] Figure 3 An exploded view of the base in the present invention;

[0028] Figure 4 It is a structural schematic diagram of the wheelchair frame of the present invention;

[0029] Description of the numbers in the figure:

[0030] 110, wheelchair frame; 1101, U-shaped support frame; 1102, first connecting frame; 1103, second connecting frame;

[0031] 111, first pin shaft; 112, second pin shaft; 113, mounting support member;

[0032] 120, longitudinal large rocker arm; 121, third pin shaft; 122, fourth pin shaft; 123, fifth pin shaft;

[0033] 130, longitudinal front small rocker arm; 131, driving motor; 132, longitudinal large driving wheel; 133, front universal wheel;

[0034] 140, longitudinal rear small rocker arm; 141, rear universal wheel;

[0035] 150, connecting rod;

[0036] 160, front lateral conversion rocker arm; 161, conversion connecting rod;

[0037] 2. Seat. DETAILED DESCRIPTION

[0038] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar symbols throughout represent the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0039] like Figure 1-Figure 4 A torsion-eliminating base and wheelchair thereof shown:

[0040] Wheelchair frame 110: A first transverse pin 111 is provided at the center of the lower part of both sides of the wheelchair frame 110, a second longitudinal pin 112 is provided at the center of the upper part of the front side, and multiple groups of mounting supports 113 are installed on the top side. The wheelchair frame 110 is composed of two groups of U-shaped support frames 1101, and each U-shaped support frame 1101 is composed of a group of transverse supports and two groups of longitudinal supports. The two groups of longitudinal supports are arranged in parallel and are respectively connected to the same side of the two ends of the transverse supports. The two groups of U-shaped support frames 1101 are distributed up and down, and the planes they are located are parallel to each other. The middle parts of the two groups of transverse supports are vertically connected by the first connecting frame 1102, and the ends of the transverse supports facing each other up and down of the two groups of U-shaped support frames 1101 are longitudinally connected by the second connecting frame 1103. This structural design provides a stable basic framework for the entire wheelchair, and also provides support for the installation and movement of other components.

[0041] Longitudinal large rocker arm 120: Two groups of longitudinal large rocker arms 120 are provided, and two groups of first pins 111 are rotatably connected to the middle of the two groups of longitudinal large rocker arms 120. A third pin 121 is longitudinally provided at the front end of the longitudinal large rocker arm 120, and a fourth pin 122 and a fifth pin 123 are transversely provided on the side walls at both ends from front to back. The longitudinal large rocker arm 120 plays a key role in connection and transmission in the wheelchair structure. It can transmit the movement of the wheelchair frame 110 to other components, and its own rotation design makes it possible for the entire wheelchair to eliminate torsion and adapt to terrain changes.

[0042] Longitudinal front small rocker arm 130: The two groups of fourth pins 122 are respectively rotatably connected to the middle parts of the two groups of longitudinal front small rocker arms 130, and the front end of the longitudinal front small rocker arm 130 is equipped with a front universal wheel 133. The connection mode of the longitudinal front small rocker arm 130 and the longitudinal large rocker arm 120 enables it to flexibly rotate according to the change of the terrain, and the front universal wheel 133 further enhances the steering ability of the wheelchair in complex terrain.

[0043] Longitudinal rear small rocker arm 140: The two groups of fifth pins 123 are respectively rotatably connected to the middle parts of the two groups of longitudinal rear small rocker arms 140, and the rear end of the longitudinal rear small rocker arm 140 is equipped with a rear universal wheel 141. The longitudinal rear small rocker arm 140 works in coordination with the longitudinal large rocker arm 120, and together with the longitudinal front small rocker arm 130, realizes the coordinated movement of the front and rear wheels of the wheelchair, thereby improving the wheelchair's ability to pass under different terrains.

[0044] Connecting rod 150: One end of the longitudinal front small rocker arm 130 and one end of the longitudinal rear small rocker arm 140 located on the same side are connected through the connecting rod 150. One end of the connecting rod 150 is hinged to one end of the longitudinal front small rocker arm 130, and the other end is hinged to one end of the longitudinal rear small rocker arm 140. The setting of the connecting rod 150 connects the longitudinal front small rocker arm 130 and the longitudinal rear small rocker arm 140 into a whole, so that they can coordinate with each other during movement and jointly cope with terrain changes.

[0045] Drive system: The two sets of longitudinal front small rocker arms 130 are installed with a drive motor 131 and a longitudinal large drive wheel 132 near the connecting rod 150. The drive motor 131 is used to drive the longitudinal large drive wheel 132 to rotate. The drive motor 131 and the longitudinal large drive wheel 132 are connected by a transmission belt or chain transmission, and a protective shell is provided outside the transmission structure to prevent debris from entering the transmission structure and affecting the transmission effect. The drive system provides power for the wheelchair, allowing the wheelchair to travel autonomously on different terrains, and the setting of the protective shell ensures the stability and reliability of the transmission system.

[0046] Front lateral conversion rocker arm 160: The second pin shaft 112 is rotatably connected to the middle part of the front lateral conversion rocker arm 160, and both ends of the front lateral conversion rocker arm 160 are rotatably connected to conversion links 161, and the other ends of the two sets of conversion links 161 are respectively rotatably connected to the third pin shaft 121 on the same side. The front lateral conversion rocker arm 160 plays a core role in the wheelchair's torque elimination system. It can transmit the movement of the wheelchair frame 110 to the longitudinal large rocker arm 120, realizing the coordinated movement and torque elimination function between the six wheels.

[0047] Seat 2: Seat 2 is installed on the upper part of the mounting support 113 on the top side of the wheelchair frame 110. Seat 2 includes a seat cushion, a backrest and an armrest. The seat cushion and the backrest are filled with elastic sponge, and the surface of the armrest is provided with an anti-slip rubber layer. The design of seat 2 is to provide a comfortable riding experience for the user. The filling of elastic sponge and the setting of the anti-slip rubber layer increase the comfort and safety of the user.

[0048] Working principle and process

[0049] When the wheelchair travels on an uneven ground, the unevenness of the ground will cause one or some wheels to be subjected to different degrees of force. For example, when the front universal wheel 133 on one side encounters a protrusion or a depression, the longitudinal front small rocker arm 130 on that side will rotate around the fourth pin 122, and the longitudinal large rocker arm 120 will also rotate around the first pin 111. This rotation is transmitted to the longitudinal rear small rocker arm 140 through the connecting rod 150, so that the longitudinal rear small rocker arm 140 also adjusts its position accordingly. At the same time, the front lateral conversion rocker arm 160 will drive the longitudinal large rocker arms 120 on both sides to move in coordination through the conversion connecting rod 161 according to the inclination of the wheelchair frame 110. In this way, the six wheels can cooperate with each other to achieve synchronous lifting and obstacle crossing. In this process, due to the coordinated movement between the wheels, the lifting and lowering of any single wheel, double wheel or three wheels will not affect the ground support grip of other wheels. For example, when one wheel is raised, the other wheels will automatically adjust their positions to keep the entire wheelchair balanced and stable, greatly reducing the bumps of the wheelchair during travel.

[0050] The left and right ends of the lateral conversion rocker arm 160 on the front side of the wheelchair frame 110 are movably connected to the left longitudinal large rocker arm 120 at the left end, and movably connected to the right longitudinal large rocker arm 120 at the right end; the longitudinal large rocker arms 120 on both sides are identical, and the front end is movably connected to a longitudinal front small rocker arm 130, and the rear end is movably connected to a longitudinal rear small rocker arm 140. This unique connection method constitutes the core torsion elimination structure of the wheelchair of the present invention, realizing the coordinated movement between the six wheels and the function of adaptive terrain changes.

[0051] The present invention protects the overall structural design of the torsion-eliminating base and the wheelchair thereof, including the specific structures, positional relationships, connection modes and cooperative working principles of each component such as the wheelchair frame 110, the longitudinal large rocker arm 120, the longitudinal front small rocker arm 130, the longitudinal rear small rocker arm 140, the connecting rod 150, the front lateral conversion rocker arm 160, the drive system and the seat 2. Any improvement, deformation or equivalent replacement based on the technical solution of the present invention shall be protected by law as long as it falls within the protection scope of the present invention.

[0052] 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", "axial", "radial", "circumferential" 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 limiting the present invention.

[0053] 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 at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0054] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0055] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0056] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A torsion-eliminating base and a wheelchair thereof, characterized in that: include: A wheelchair frame (110), wherein a first transverse pin shaft (111) is provided at the center of the lower part of both sides of the wheelchair frame (110), a second longitudinal pin shaft (112) is provided at the center of the upper part of the front side, and a plurality of groups of mounting support members (113) are installed on the top side; Two groups of longitudinal large rocker arms (120), the two groups of the first pins (111) are respectively rotatably connected to the middle parts of the two groups of longitudinal large rocker arms (120), the front end of the longitudinal large rocker arm (120) is longitudinally provided with a third pin (121), and the side walls at both ends thereof are transversely provided with a fourth pin (122) and a fifth pin (123) from front to rear; Two groups of longitudinal front small rocker arms (130), the two groups of fourth pins (122) are rotatably connected to the middle parts of the two groups of longitudinal front small rocker arms (130), and the front ends of the longitudinal front small rocker arms (130) are equipped with front universal wheels (133); Two groups of longitudinal rear small rocker arms (140), the two groups of the fifth pins (123) are rotatably connected to the middle parts of the two groups of longitudinal rear small rocker arms (140), and the rear ends of the longitudinal rear small rocker arms (140) are equipped with rear universal wheels (141); Two groups of connecting rods (150), one end of the longitudinal front small rocker arm (130) and one end of the longitudinal rear small rocker arm (140) located on the same side are connected through the connecting rod (150), one end of the connecting rod (150) is hinged to one end of the longitudinal front small rocker arm (130), and the other end is hinged to one end of the longitudinal rear small rocker arm (140); the parts of the two groups of longitudinal front small rocker arms (130) close to the connecting rod (150) are equipped with a driving motor (131) and a longitudinal large driving wheel (132), and the driving motor (131) is used to drive the longitudinal large driving wheel (132) to rotate; A group of front lateral conversion rocker arms (160), the second pin shaft (112) is rotatably connected to the middle part of the front lateral conversion rocker arm (160), both ends of the front lateral conversion rocker arm (160) are rotatably connected to conversion connecting rods (161), and the other ends of the two groups of conversion connecting rods (161) are respectively rotatably connected to the third pin shaft (121) on the same side; A seat (2) is mounted on the upper portion of a mounting support (113) on the top side of a wheelchair frame (110).

2. The torsion-eliminating base and wheelchair thereof according to claim 1, characterized in that: The wheelchair frame (110) is composed of two groups of U-shaped support frames (1101), each of which is composed of a group of transverse supports and two groups of longitudinal supports; the two groups of longitudinal supports are arranged in parallel and are respectively connected to the same side of two ends of the transverse supports; the two groups of U-shaped support frames (1101) are distributed up and down, and the planes on which they are located are parallel to each other; the middle parts of the two groups of transverse supports are vertically connected by a first connecting frame (1102), and the ends of the transverse supports directly facing each other up and down of the two groups of U-shaped support frames (1101) are longitudinally connected by a second connecting frame (1103).

3. The torsion-eliminating base and wheelchair thereof according to claim 1, characterized in that: The driving motor (131) and the longitudinal large driving wheel (132) are connected via a transmission belt or a chain, and a protective shell is provided outside the transmission structure to prevent debris from entering the transmission structure and affecting the transmission effect.

4. The torsion-eliminating base and wheelchair thereof according to claim 1, characterized in that: The seat (2) comprises a seat cushion, a backrest and an armrest; the seat cushion and the backrest are filled with elastic sponge, and the surface of the armrest is provided with an anti-slip rubber layer.

5. The torsion-eliminating base and wheelchair thereof according to claim 4, characterized in that: The two groups of longitudinal large driving wheels (132) are both provided with brake devices, and the brake devices can be controlled by a manual operating lever and an electric control device.

6. The torsion-eliminating base and wheelchair thereof according to claim 5, characterized in that: It also includes a controller and a battery, wherein the controller is electrically connected to the drive motor (131) and is used to control the rotation speed and direction of the drive motor (131); the battery supplies power to the drive motor (131) and the controller, and the battery is installed inside the wheelchair frame (110); and the manual operating lever and the electric control device are installed on the armrest.

7. The torsion-eliminating base and wheelchair thereof according to claim 1, characterized in that: The seat (2) is provided with a storage basket for storing items.

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