Torsion eliminating base and wheelchair with same

Abstract

The utility model relates to the technical field of wheelchairs, and discloses a torsion-eliminating base and a wheelchair thereof, 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, and the top of the wheelchair frame is provided with an installation supporting piece. 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, and the working principle is that when the vehicle runs on the concave-convex ground, all parts cooperate, and the positions of 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] This utility model relates to the field of wheelchair technology, and in particular to a torsion-eliminating base and the wheelchair thereof. Background Technology

[0002] In today's society, wheelchairs, as important mobility aids, provide mobility opportunities for people with disabilities. However, existing wheelchair designs have many shortcomings. Most wheelchairs currently use a fixed wheel design, with all wheels on the same plane. When traveling on uneven ground, the lower wheels may lack sufficient traction, and in severe cases, the wheels may even become suspended in the air. This not only significantly impacts the user's experience but can also pose safety hazards. For example, on slopes or other complex terrain, suspended wheels can easily cause the wheelchair to lose balance, leading to dangerous situations such as tipping over.

[0003] Some wheelchairs attempt to improve shock absorption and torsion reduction by incorporating coil springs. However, due to the relatively small size of wheelchairs, the size of the springs used is limited, resulting in extremely limited shock absorption and torsion reduction travel. When facing slightly uneven terrain, this minimal shock absorption and torsion reduction effect is almost negligible, and the wheelchair still struggles to traverse smoothly, severely restricting its use in complex terrain.

[0004] The reason for this is that the rigid structure of existing wheelchairs results in a lack of effective coordination and self-adaptation between the wheels, making it impossible to automatically adjust the support and position of each wheel according to ground conditions. Furthermore, the reliance on a single shock absorption method is insufficient to cope with 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. Utility Model Content

[0005] To address the technical problems existing in the background art, this utility model proposes a torsion-eliminating base and its wheelchair.

[0006] This utility model proposes an anti-torsion base and a wheelchair thereof, comprising:

[0007] The wheelchair frame has a first horizontal pin on each of the lower sides of the frame, a second vertical pin on the upper front side, and multiple sets of mounting supports installed on the top side.

[0008] Two sets of longitudinal rocker arms, with the first pins of the two sets respectively rotatably connected to the middle of the two sets of longitudinal rocker arms. The front end of the longitudinal rocker arm is provided with a third pin, and the side walls at both ends are provided with a fourth pin and a fifth pin respectively from front to back.

[0009] Two sets of longitudinal front rocker arms, the two sets of fourth pins are respectively rotatably connected to the middle of the two sets of longitudinal front rocker arms, and the front universal wheels are installed at the front end of the longitudinal front rocker arms;

[0010] Two sets of longitudinal rear rocker arms, the two sets of fifth pins are respectively rotatably connected to the middle of the two sets of longitudinal rear rocker arms, and the rear end of the longitudinal rear rocker arms is equipped with rear casters;

[0011] Two sets of connecting rods are connected by connecting rods between one end of the longitudinal front rocker arm and one end of the longitudinal rear rocker arm on the same side. One end of the connecting rod is hinged to one end of the longitudinal front rocker arm and the other end is hinged to one end of the longitudinal rear rocker arm. A drive motor and a longitudinal large drive wheel are installed on the part of the two sets of longitudinal front rocker arms near the connecting rods. The drive motor is used to drive the longitudinal large drive wheel to rotate.

[0012] A set of front lateral conversion rocker arms, the second pin is rotatably connected to the middle of the front lateral conversion rocker arm, both ends of the front lateral conversion rocker arm are rotatably connected to conversion linkages, and the other ends of the two sets of conversion linkages are respectively rotatably connected to the third pin on the same side;

[0013] A seat, which is mounted on the upper part of a mounting support on the top side of the wheelchair frame.

[0014] Preferably, the wheelchair frame is composed of two sets of U-shaped support frames, each U-shaped support frame consisting of one set of transverse supports and two sets of longitudinal supports; the two sets of longitudinal supports are arranged in parallel and are respectively connected to the same side at both ends of the transverse supports; the two sets of U-shaped support frames are distributed vertically and their planes are parallel to each other; the middle parts of the two sets of transverse supports are vertically connected by a first connecting frame, and the ends of the transverse supports that are directly opposite each other in the two sets of U-shaped support frames are longitudinally connected by a second connecting frame.

[0015] Preferably, the drive motor and the longitudinal large drive wheel are connected by a transmission belt or chain, and the transmission structure is provided with a protective shell to prevent foreign objects from entering the transmission structure and affecting the transmission effect.

[0016] Preferably, the seat includes a seat cushion, a backrest, and armrests, wherein the seat cushion and backrest are filled with elastic sponge, and the surface of the armrests is provided with a non-slip rubber layer.

[0017] Preferably, both sets of longitudinal large drive wheels are equipped with braking devices, which can be controlled by a manual operating lever and an electric control device.

[0018] Preferably, the wheelchair also includes a controller and a battery. The controller is electrically connected to the drive motor and is used to control the speed and direction of the drive motor. The battery powers the drive motor and the controller and is installed inside the wheelchair frame. The manual operating lever and the electric control device are installed on the armrests.

[0019] Preferably, the seat is equipped with a storage basket for storing items.

[0020] The anti-torsion base and wheelchair proposed in this utility model have significant advantages compared with the prior art.

[0021] Driving Stability: This six-wheeled wheelchair features a unique structural design that interconnects all six wheels. When navigating uneven terrain, the simultaneous raising and lowering of any single, double, or triple wheel to overcome obstacles does not affect the ground grip of the other wheels. Compared to existing wheelchairs, when a single wheel is raised or lowered, causing the wheelchair to tilt, the tilt angle is only one-quarter that of existing wheelchairs. This significantly improves stability during driving, greatly enhances the user's riding experience, and reduces discomfort and safety hazards caused by bumps and tilting.

[0022] Obstacle-crossing capability: Unlike existing wheelchairs, the load on each wheel does not gradually increase as it rises to climb over obstacles. Instead, the load decreases as the wheel rises. This makes the wheelchair smoother, easier, and faster during obstacle crossing, significantly improving its ability to quickly traverse complex terrain. Whether facing small potholes or larger obstacles, this wheelchair can easily handle them, providing greater mobility and convenience for people with mobility impairments.

[0023] Terrain Adaptive Capability: The unique anti-torsion base structure allows the wheelchair to automatically adjust the position and support of each wheel according to ground conditions, achieving adaptability to complex terrains. This adaptive capability not only improves the wheelchair's maneuverability but also reduces the physical demands on the user, making it easier for them to navigate different terrains.

[0024] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of this utility model;

[0026] Figure 2 This is a schematic diagram of the base structure in this utility model;

[0027] Figure 3 This is an exploded view of the base in this utility model;

[0028] Figure 4 This is a schematic diagram of the wheelchair frame in this utility model;

[0029] Explanation of the labels in the diagram:

[0030] 110. Wheelchair frame; 1101. U-shaped support frame; 1102. First connecting frame; 1103. Second connecting frame;

[0031] 111. First pin; 112. Second pin; 113. Mounting support;

[0032] 120. Longitudinal large rocker arm; 121. Third pin; 122. Fourth pin; 123. Fifth pin;

[0033] 130. Longitudinal front small rocker arm; 131. Drive motor; 132. Longitudinal large drive wheel; 133. Front swivel wheel;

[0034] 140. Rear swingarm (longitudinal); 141. Rear swivel wheel;

[0035] 150. Connecting rod;

[0036] 160. Front lateral conversion rocker arm; 161. Conversion linkage;

[0037] 2. Seats. Detailed Implementation

[0038] The embodiments of this utility model are described in detail below. Examples of these embodiments are illustrated in the accompanying drawings, wherein the same or similar symbols denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0039] like Figures 1-4 The diagram shows a torsion-eliminating base and its associated wheelchair.

[0040] Wheelchair frame 110: The wheelchair frame 110 has a first transverse pin 111 at the center of the lower part on both sides, and a second longitudinal pin 112 at the center of the upper front part. Multiple sets of mounting supports 113 are installed on the top side. The wheelchair frame 110 consists of two sets of U-shaped support frames 1101, each consisting of one transverse support and two sets of longitudinal supports. The two sets of longitudinal supports are arranged parallel to each other and connected to the same side at both ends of the transverse supports. The two sets of U-shaped support frames 1101 are vertically distributed and their planes are parallel to each other. The middle parts of the two sets of transverse supports are vertically connected by a first connecting frame 1102, and the ends of the transverse supports of the two sets of U-shaped support frames 1101 are longitudinally connected by a second connecting frame 1103. This structural design provides a stable basic frame for the entire wheelchair and also provides support for the installation and movement of other components.

[0041] Longitudinal large rocker arm 120: Two sets of longitudinal large rocker arms 120 are provided, and two sets of first pins 111 are rotatably connected to the middle of the two sets of longitudinal large rocker arms 120 respectively. 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 provided laterally from front to back on the side walls at both ends. The longitudinal large rocker arm 120 plays a key connecting and transmission role in the wheelchair structure. It can transmit the movement of the wheelchair frame 110 to other components, and its own rotation design provides the possibility for the entire wheelchair to eliminate torque and adapt to changes in terrain.

[0042] Longitudinal front small rocker arm 130: Two sets of fourth pins 122 are rotatably connected to the middle of the two sets of longitudinal front small rocker arms 130 respectively, and front omnidirectional wheels 133 are installed at the front end of the longitudinal front small rocker arm 130. The connection between the longitudinal front small rocker arm 130 and the longitudinal large rocker arm 120 allows it to rotate flexibly according to changes in terrain, and the front omnidirectional wheels 133 further enhance the wheelchair's steering ability in complex terrain.

[0043] Longitudinal rear small rocker arm 140: Two sets of fifth pins 123 are rotatably connected to the middle of the two sets of longitudinal rear small rocker arms 140 respectively, and rear universal wheels 141 are installed at the rear end of the longitudinal rear small rocker arm 140. The longitudinal rear small rocker arm 140 works in conjunction 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, improving the wheelchair's ability to pass through different terrains.

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

[0045] Drive System: Two sets of longitudinal small rocker arms 130 are equipped with drive motors 131 and longitudinal large drive wheels 132 near the connecting rod 150. The drive motors 131 drive the longitudinal large drive wheels 132 to rotate. The drive motors 131 and longitudinal large drive wheels 132 are connected by a transmission belt or chain, and the transmission structure is protected by a protective shell to prevent debris from entering the transmission structure and affecting the transmission effect. The drive system provides power to the wheelchair, enabling it to move autonomously on different terrains, while the protective shell ensures the stability and reliability of the transmission system.

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

[0047] Seat 2: Seat 2 is mounted 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 armrests. The seat cushion and backrest are filled with elastic foam, and the armrests have a non-slip rubber layer on the surface. Seat 2 is designed to provide users with a comfortable riding experience. The elastic foam filling and the non-slip rubber layer increase the user's comfort and safety.

[0048] Working principle and process

[0049] When a wheelchair travels on uneven ground, the unevenness causes one or more wheels to experience varying degrees of force. For example, when one of the front swivel wheels 133 encounters a bump or depression, the longitudinal front small rocker arm 130 on that side will rotate around the fourth pivot 122, while the longitudinal large rocker arm 120 will rotate around the first pivot 111. This rotation is transmitted to the longitudinal rear small rocker arm 140 via the connecting rod 150, causing the longitudinal rear small rocker arm 140 to adjust its position accordingly. Simultaneously, the front lateral switching rocker arm 160, depending on the tilt of the wheelchair frame 110, will drive the longitudinal large rocker arms 120 on both sides to move in coordination via the switching link 161. In this way, the six wheels can cooperate to achieve synchronized lifting and lowering to overcome obstacles. During this process, due to the coordinated movement between the wheels, the lifting or lowering of any single, double, or triple wheel will not affect the ground support and grip of the other wheels. For example, when one wheel is raised, the other wheels will automatically adjust their positions to maintain the balance and stability of the entire wheelchair, greatly reducing the bumps during the ride.

[0050] The wheelchair frame 110 has two lateral switching arms 160 at its front ends. The left end is movably connected to the left longitudinal large rocker arm 120, and the right end is movably connected to the right longitudinal large rocker arm 120. The two identical longitudinal large rocker arms 120 on both sides are movably connected to a longitudinal front small rocker arm 130 at the front end and a longitudinal rear small rocker arm 140 at the rear end. This unique connection method constitutes the core torsion-eliminating structure of this wheelchair, enabling coordinated movement among the six wheels and adaptive terrain changes.

[0051] This utility model protects the overall structural design of the anti-torsion base and its wheelchair, including the specific structure, positional relationship, connection method, and cooperative working principle of each component such as the wheelchair frame 110, longitudinal large rocker arm 120, longitudinal front small rocker arm 130, longitudinal rear small rocker arm 140, connecting rod 150, front lateral conversion rocker arm 160, drive system, and seat 2. Any improvement, modification, or equivalent substitution based on the technical solution of this utility model, as long as it falls within the protection scope of this utility model, shall be protected by law.

[0052] It should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0053] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0054] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0055] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0056] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A twist-reducing base and a wheelchair vehicle comprising the same, characterized by comprising: include: The wheelchair frame (110) has a first horizontal pin (111) at the center of the lower part on both sides, a second vertical pin (112) at the center of the upper part on the front side, and multiple sets of mounting supports (113) installed on the top side. Two sets of longitudinal large rocker arms (120), two sets of first pins (111) are rotatably connected to the middle of the two sets of longitudinal large rocker arms (120), the front end of the longitudinal large rocker arm (120) is provided with a third pin (121), and the side walls at both ends are provided with a fourth pin (122) and a fifth pin (123) from front to back respectively. Two sets of longitudinal front rocker arms (130), and two sets of fourth pins (122) are rotatably connected to the middle of the two sets of longitudinal front rocker arms (130), and front universal wheels (133) are installed at the front end of the longitudinal front rocker arms (130). Two sets of longitudinal rear rocker arms (140), the two sets of fifth pins (123) are respectively rotatably connected to the middle of the two sets of longitudinal rear rocker arms (140), and the rear end of the longitudinal rear rocker arms (140) is equipped with a rear universal wheel (141). Two sets of connecting rods (150) are connected by connecting rods (150) on the same side, one end of the longitudinal front rocker arm (130) and one end of the longitudinal rear rocker arm (140). One end of the connecting rod (150) is hinged to one end of the longitudinal front rocker arm (130) and the other end is hinged to one end of the longitudinal rear rocker arm (140). A drive motor (131) and a longitudinal large drive wheel (132) are installed on the part of the two sets of longitudinal front rocker arms (130) near the connecting rod (150). The drive motor (131) is used to drive the longitudinal large drive wheel (132) to rotate. A set of front lateral conversion rocker arms (160) are provided. The second pin (112) is rotatably connected to the middle of the front lateral conversion rocker arms (160). Both ends of the front lateral conversion rocker arms (160) are rotatably connected to conversion connecting rods (161). The other ends of the two sets of conversion connecting rods (161) are rotatably connected to the third pin (121) on the same side. Seat (2), which is mounted on the upper part of the mounting support (113) on the top side of the wheelchair frame (110).

2. A counter-rotating base and wheelchair according to claim 1, characterized in that: The wheelchair frame (110) consists of two sets of U-shaped support frames (1101). Each U-shaped support frame (1101) consists of one set of transverse supports and two sets of longitudinal supports. The two sets of longitudinal supports are arranged in parallel and are respectively connected to the same side at both ends of the transverse supports. The two sets of U-shaped support frames (1101) are distributed vertically and their planes are parallel to each other. The middle parts of the two sets of transverse supports are vertically connected by a first connecting frame (1102), and the ends of the transverse supports that are directly opposite each other in the two sets of U-shaped support frames (1101) are longitudinally connected by a second connecting frame (1103).

3. The untwisting base and wheelchair according to claim 1, characterized in that: The drive motor (131) is connected to the longitudinal large drive wheel (132) by a transmission belt or chain, and the transmission structure is provided with a protective shell to prevent foreign objects from entering the transmission structure and affecting the transmission effect.

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

5. A counter-rotating base and wheelchair according to claim 4, characterized in that: Both sets of longitudinal large drive wheels (132) are equipped with braking devices, which can be controlled by a manual operating lever and an electric control device.

6. A counter-rotating base and wheelchair according to claim 5, characterized in that: It also includes a controller and a battery, the controller being electrically connected to the drive motor (131) for controlling the speed and direction of the drive motor (131); the battery powering the drive motor (131) and the controller, and the battery being installed inside the wheelchair frame (110); the manual operating lever and the electric control device being installed on the armrests.

7. The untwisting base and wheelchair according to claim 1, wherein: The seat (2) is equipped with a storage basket for storing items.

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