A wheelchair with anti-tilt

Abstract

The application provides an anti-tilting wheelchair, which comprises a control frame, a plurality of rotating wheel assemblies symmetrically arranged on both sides of the control frame and a height adjusting assembly connecting the rotating wheel assemblies and the control frame, the rotating wheel assembly comprises a self-driven wheel and a connecting plate, the height adjusting assembly comprises a plurality of hinged rods connected between the connecting plate and the control frame and a height adjusting cylinder, the two ends of the hinged rod are hinged to the connecting plate and the control frame respectively, the two ends of the height adjusting cylinder are hinged to the connecting plate and the control frame, an acute angle is always kept between the height adjusting cylinder and the hinged rod, the deformation of the multi-layer rectangular frame structure can be controlled after the height adjusting cylinder is started, the connecting plate and the self-driven wheel can move parallel to the gravity center direction of the control frame, the height of the self-driven wheel can be adjusted through the height adjusting cylinder, the control frame can be adjusted to the horizontal position through the connection and limiting of the hinged rod, and the probability of the wheelchair rollover is reduced.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and more particularly to an anti-tilt wheelchair. Background Technology

[0002] When using a wheelchair with a mobile frame, the four wheels of the wheelchair cannot always be on the same horizontal plane when going over steep slopes. Therefore, the plane on which the wheelchair supports the body is not easy to keep level. As a result, the patient's center of gravity loses balance, and the wheelchair is very likely to tip over (or tilt forward or backward), which poses a safety hazard. Summary of the Invention

[0003] The technical problem to be solved by this invention is that the four wheels of the wheelchair's mobile frame are not on the same horizontal plane when passing over a ramp.

[0004] The technical solution adopted by this invention to solve its technical problem is: an anti-tilt wheelchair, including a control frame, a plurality of wheel assemblies symmetrically arranged on both sides of the control frame, and a height adjustment assembly connecting the wheel assemblies and the control frame. The wheel assembly includes self-driving wheels mounted on the control frame and a connecting plate mounted at the axle of the self-driving wheels. There are at least four self-driving wheels. The height adjustment assembly includes a plurality of hinge rods connected between the connecting plate and the control frame and a height adjustment cylinder. The two ends of the hinge rods are respectively hinged to the connecting plate and the control frame. The connecting plate, the hinge rods, and the control frame, when connected, form a deformable multi-layer rectangular frame structure. The two ends of the height adjustment cylinder are both hinged to the connecting plate and the control frame. The height adjustment cylinder and the hinge rods always maintain an acute angle. After the height adjustment cylinder is activated, it can control the deformation of the multi-layer rectangular frame structure. The connecting plate and the self-driving wheels can move parallel to the center of gravity direction of the control frame.

[0005] Furthermore, the hinge rod is connected to both sides of the connecting plate, and the height adjustment cylinder is connected to the middle of the connecting plate.

[0006] Furthermore, the control frame includes a suspension frame, and the hinge rod and the height adjustment cylinder are both hinged to the suspension frame.

[0007] Furthermore, the rotary wheel assembly also includes a plurality of auxiliary wheels, which are mounted on the self-driving wheel, and the diameter of the auxiliary wheels is smaller than that of the self-driving wheel.

[0008] Furthermore, the wheelchair also includes a human-shaped folding cushion, and the auxiliary wheels are also mounted to the ends of the human-shaped folding cushion.

[0009] Furthermore, the suspension frame also includes a support plate mounted on the frame body, and a power source is installed on the support plate, which is electrically connected to the self-driving wheel.

[0010] Furthermore, the control frame also includes a base, which is mounted on the suspension frame, and a level sensor is installed on the base. The level sensor is electrically connected to the self-driving wheel.

[0011] The beneficial effects of this invention are that a connecting plate is set at the axle position of the self-driving wheel, and the control frame and the connecting plate are movably connected by a hinge rod to form a rectangular frame structure that is highly deformable. At the same time, a height adjustment cylinder is movably connected in the rectangular frame structure. The movable adjustment cylinder can cause the rectangular frame structure to deform in a controllable manner, driving the self-driving wheel to move up and down in a parallel state. The height of each self-driving wheel can be adjusted according to the road conditions, thereby reducing the degree of bumps when the wheelchair passes through uneven road conditions, reducing the probability of the wheelchair tipping over, and avoiding any impact on the patient's personal safety. Attached Figure Description

[0012] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0013] Figure 1 This is a perspective view of the wheelchair of the present invention;

[0014] Figure 2 yes Figure 1 Another perspective view of the wheelchair shown (omitting the human-shaped folding cushion and base);

[0015] Figure 3 yes Figure 1 A 3D view of the wheelchair's lifting mechanism and some of its components;

[0016] Figure 4 yes Figure 1 A perspective view of the wheel assembly, height adjustment assembly, and angle adjustment assembly shown.

[0017] Figure 5 yes Figure 1 The diagram shows a wheelchair being used to move a patient.

[0018] In the diagram: Wheelchair-100, Control Frame-10, Human-shaped Folding Cushion-20, Suspension Frame-110, Protective Housing-120, Base-130, Rotating Plate-131, Rotating Frame-132, Rotating Cylinder-133, Lifting Assembly-30, Wheel Assembly-40, Height Adjustment Assembly-50, Angle Adjustment Assembly-60, Frame-111, Load-bearing Plate-112, Power Supply-113, Lifting Rod-310, Operating... Control lever-320, support plate-330, lifting cylinder-340, limit block-114, self-driving wheel-410, connecting plate-420, auxiliary wheel-430, hinge rod-510, height adjustment cylinder-520, rotating bracket-610, self-rotating rod-620, control component-630, crank rod-611, control shaft-631, limit link-621, limit groove-115, limit rod-622. Detailed Implementation

[0019] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals 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 the invention, and should not be construed as limiting the invention. Rather, embodiments of the invention include all variations, modifications, and equivalents falling within the spirit and scope of the appended claims.

[0020] like Figure 1 and Figure 2 As shown, the present invention provides a wheelchair 100 for easy movement of patients, including a control frame 10 and a human-shaped folding pad 20 mounted on the control frame 10. The human-shaped folding pad 20 can be adjusted to conform to the shape of the human body. The control frame 10 is located below the human-shaped folding pad 20. By moving the control frame 10, the human-shaped folding pad 20 and the human body on it can be moved.

[0021] The control frame 10 includes a suspension frame 110, a protective housing 120 fixedly mounted on the suspension frame 110, and a base 130 fixedly mounted on the protective housing 120. A human-shaped folding pad 20 is rotatably mounted on the base 130. A level sensor (not shown) is mounted on the side of the base 130 facing the protective housing 120. The level sensor monitors whether the base 130 is in a level position. A control terminal (not shown) is also provided on the plane of the base 130 opposite to the human-shaped folding pad 20. The level sensor transmits detection data to the control terminal, which adjusts the base 130 according to the detected tilt angle to prevent the human-shaped folding pad 20 from tipping over. The protective housing 120 is perpendicular to the base 130, and the base 130 is detachably mounted to the protective housing 120.

[0022] Preferably, the base 130 includes a rotating plate 131 and a rotating frame 132. The human-shaped folding cushion 20 is rotatably mounted on the rotating plate 131, and the human-shaped folding cushion 20 can be folded to change from a sitting posture to a lying posture parallel to the rotating plate 131. The rotating frame 132 is fixedly installed on the side of the rotating plate 131 away from the human-shaped folding pad 20. One end of the rotating frame 132 is hinged to the top of the protective box 110. A rotating cylinder 133 is hinged to the rotating frame 132. The cylinder body of the rotating cylinder 133 is hinged to the inside of the protective box 110. The piston shaft of the rotating cylinder 133 is hinged to the middle position of the rotating frame 132. After the rotating cylinder 133 is started, when the piston shaft extends or retracts, it can drive the rotating plate 131 and the human-shaped folding pad 20 to rotate relative to the protective box 120, changing the angle of the human-shaped folding pad 20 relative to the protective box 120. When the wheelchair 100 approaches the bed or sofa, the human-shaped folding pad 20 can be tilted by the action of the rotating cylinder 133, so that the patient can slide down onto the sofa or bed.

[0023] The wheelchair 100 also includes a lifting assembly 30 mounted on a suspension frame 110, several wheel assemblies 40 symmetrically arranged on both sides of the suspension frame 110, a height adjustment assembly 50 connecting the wheel assemblies 40 and the suspension frame 110, and an angle adjustment assembly 60.

[0024] The suspension frame 110 includes a square-shaped mesh frame 111 and a support plate 112 fixedly laid on the frame 111. The protective housing 120 is fixedly installed on the support plate 112. A power supply 113, preferably a lithium battery, is also installed on the support plate 112 to provide power for the wheelchair's movement. The four corners of the frame 111 extend beyond the edges of the support plate 112.

[0025] The lifting assembly 30 includes a plurality of lifting rods 310 forming a scissor structure, a control lever 320 hinged to the lifting rods 310, a support plate 330 mounted on the top of the scissor structure, and a lifting cylinder 340 hinged to the control lever 320.

[0026] like Figure 3As shown, the lifting rods 310 are hinged together to form a scissor structure. The bottom end of the scissor structure is slidably mounted on the support plate 112. Specifically, a limit block 114 is fixedly mounted on the support plate 112. The limit block 114 has a waist-shaped groove (not shown in the figure). The bottom end of the scissor structure is hinged in the waist-shaped groove. The abutment plate 330 is set inside the protective housing 120. The abutment plate 330 has a U-shaped structure. The top end of the scissor structure is hinged to the wing plate of the abutment plate 330, and the end of the lifting rod 310 can slide relative to the wing plate of the abutment plate 330. The cylinder body of the rotating cylinder 133 is hinged to the abutment plate 330. The control lever 320 is located near the support plate 112 and is in the middle position of the lifting rod 310 in the scissor structure. The cylinder body of the lifting cylinder 340 is hinged to the support plate 112, and the piston shaft of the lifting cylinder 340 is hinged to the control lever 320.

[0027] After the lifting cylinder 340 is started, the control lever 320 moves away from or towards the support plate 112 under the drive of the lifting cylinder 340, thereby causing the scissor structure formed by the lifting rod 310 to deform. The lifting rods 310 at both ends of the scissor structure can move along the wing plate of the abutment plate 330 and the limit block 114 to make way. Under the push of the scissor structure, the height of the human-shaped folding pad 20 relative to the protective box 120 can be adjusted.

[0028] The wheel assembly 40 includes self-driving wheels 410 mounted on the frame 111 and a connecting plate 420 mounted on the axle of the self-driving wheels 410. Specifically, there are at least four self-driving wheels 410, and each self-driving wheel 410 is equipped with brushes (not shown) electrically connected to the power supply 113. When the brushes are energized, they can drive the self-driving wheels 410 to rotate, thereby moving the wheelchair 100. In this embodiment, the wheelchair 100 is driven by a four-wheel drive system. For specific drive methods, please refer to the drive technologies commonly used in the field of electric vehicles. Preferably, the wheel assembly 40 further includes auxiliary wheels 430, with at least four auxiliary wheels 430. Two auxiliary wheels 430 are fixedly mounted on the human-shaped folding pad 20, and two auxiliary wheels 430 are fixedly mounted on the self-driving wheel 410 in a direction away from the human-shaped folding pad 20. The diameter of the auxiliary wheels 430 is smaller than the diameter of the self-driving wheel 410. The auxiliary wheels 430 are connected to the self-driving wheel 410 through a bending rod, and the lowest end of the auxiliary wheel 430 is positioned above the lowest end of the self-driving wheel 410 after being bent. When encountering a road section with a large slope, after the auxiliary wheels 430 contact the ground, the self-driving wheel 410 can be decelerated and stopped by the speed difference, thereby realizing the deceleration and emergency stop of the wheelchair 100.

[0029] like Figure 4As shown, the height adjustment assembly 50 includes several hinge rods 510 movable relative to the suspension frame 110 and a height adjustment cylinder 520. The hinge rods 510 are hinged to both sides of the connecting plate 420. It can be understood that the self-driving wheel 410 is connected to the suspension frame 110 via the hinge rods 510. The hinge rods 510, connecting the suspension frame 110 and the connecting plate 420, together form a deformable multi-layered rectangular frame structure. Preferably, the hinge rods 510 on both sides of the connecting plate 420 are arranged relatively parallel, and the hinge rods 510 rotate in the same direction around the connecting plate 420.

[0030] The height adjustment cylinder 520 is positioned in the middle of the connecting plate 420. The piston shaft of the height adjustment cylinder 520 is hinged to the connecting plate 420, and the height adjustment cylinder 520 and the hinge rod 510 always maintain an acute angle. It can be understood that when the height adjustment cylinder 520 is activated, the piston shaft's push or retraction forcibly deforms the cuboid frame structure formed by the hinge rod 510, thereby ensuring that the self-driving wheel 410 always moves parallel to the frame 111. In other embodiments, the height adjustment assembly 50 may use only the height adjustment cylinder 520 to fixably connect the suspension frame 110 and the connecting plate 420, allowing the height of the self-driving wheel 410 relative to the suspension frame 110 to be adjusted under the drive of the height adjustment cylinder 520.

[0031] The angle adjustment assembly 60 includes a rotating bracket 610 connected to the hinge rod 510, a self-rotating rod 620 fixedly mounted on the rotating bracket 610, and a control element 630 for controlling the rotation of the self-rotating rod 620.

[0032] The rotating bracket 610 has a square frame structure parallel to and corresponding to the connecting plate 420. The hinge rod 510 is hinged to the side of the rotating bracket 610, and the cylinder body of the height adjusting cylinder 520 is hinged to the middle position of the rotating bracket 610 (the rotating shaft in the rotating bracket 610 used to connect the hinge rod 510 and the height adjusting cylinder 520 is not shown in the attached drawings). A curved rod 611 is provided in the rotating bracket 610, which is parallel to and corresponding to the bearing plate 112. The two ends of the curved rod 611 are located close to the hinge rod 510. The rotating rod 620 is fixedly connected to the curved rod 611 and can rotate relative to the bearing plate 112. The control element 630 can control the rotation of the rotating rod 620 relative to the bearing plate 112.

[0033] Understandably, in one embodiment, the control component 630 includes a control shaft 631, which is the rotating shaft of a drive motor. The drive motor body is mounted on the support plate 112, and the control shaft 631 drives the self-rotating rod 620 to rotate via gear meshing. In another embodiment, the control shaft 631 in the control component 630 can also drive the self-rotating rod 620 to rotate via a gear and rack mechanism. In yet another embodiment, the control shaft in the control component 630 can drive the self-rotating rod 620 to rotate via a belt pulley mechanism. In summary, the structural method by which the control component 630 drives the self-rotating rod 620 to rotate is not specifically limited in this embodiment. The rotation of the self-rotating rod 620 can drive the rotating bracket 610 to rotate. The rotating bracket 610 can change the angle of the self-driving wheel 410 relative to the support plate 112 via the hinge rod 510 and the connecting plate 420, thereby adjusting the rotation angle of the wheelchair 100.

[0034] Preferably, a limiting link 621 is fixedly installed on the end of the self-rotating rod 620 away from the curved rod 611. A limiting groove 115 is opened on the bearing plate 112. The limiting groove 115 is an arc-shaped waist-shaped groove. A limiting rod 622 is slidably inserted in the limiting groove 115. The limiting rod 622 is fixedly connected to the limiting link 621. When the self-rotating rod 620 rotates, the stroke of the limiting rod 622 is limited by the limiting groove 115, which can limit the rotation angle of the self-rotating rod 620. Thus, the rotation angle of the self-driving wheel 410 can be controlled by rotating the bracket 610, the hinge rod 510 and the connecting plate 420, so as to avoid the wheelchair 100 turning at too large an angle and causing a side roll.

[0035] The height adjustment cylinder 520, the control element 630, and the level sensor are electrically connected to the control terminal. The level sensor transmits the tilt angle of the base 130 to the control terminal. Based on the tilt angle information collected in the control terminal, when the tilt angle exceeds the safe range, the extension or retraction state of the height adjustment cylinder 520 corresponding to each self-drive wheel 410 can be adjusted. More specifically, the control terminal can analyze the signal transmitted by the level sensor to determine the tilt direction of the base 130. In the tilt direction, the height adjustment cylinder 520 corresponding to the self-drive wheel 410 with the lower center of gravity starts to extend, and the self-drive wheel 410 moves downward until the tilt angle of the base 130 is changed to a reasonable range, thereby preventing the wheelchair 100 from tipping over.

[0036] When turning or making a turn on a ramp, the height adjustment cylinder 520 is activated at the same time as the corresponding control component 630 is activated. The rotation angle of the self-drive wheel 410 can be changed through the self-rotating lever 620 to ensure that the turning process of the wheelchair 100 on the ramp is stable.

[0037] When the wheelchair 100 is in use, the user sits on the human-shaped folding cushion 20. When the user needs to move from the wheelchair 100 to the bed, the human-shaped folding cushion 20 can be changed into an extended state corresponding to the lying posture according to the user's needs. The human-shaped folding cushion 20 moves closer to the bed through the movement of the self-drive wheels 410. The lifting cylinder 340 in the lifting assembly 30 is activated, changing the shape of the scissor structure formed by the lifting rod 310, so that the human-shaped folding cushion 20 rises closer to the edge of the bed. Then the rotating cylinder 133 is activated. Under the resistance of the rotating cylinder 133, the base 130 supporting the human-shaped folding cushion 20 tilts, and the user can slide or roll onto the bed, which makes it easy to move the user onto the bed.

[0038] like Figure 5 In the embodiment shown, when the human-shaped folding cushion 20 is adjusted to a state slightly higher than the bed by the lifting component 30, the angle of the self-drive wheel 410 relative to the frame 111 is adjusted, causing the wheelchair 100 to tilt. The edge of the human-shaped folding cushion away from the bed is higher than the edge near the bed. Specifically, the height adjustment cylinder 520 near the bed is activated to retract, and the height adjustment cylinder 520 away from the bed is activated to extend. The human-shaped folding cushion is tilted by creating a height difference, which makes it easier for the user to move the patient.

[0039] When the wheelchair 100 encounters uneven road conditions, if the base 130 tilts, the corresponding height adjustment cylinder 520 will be activated according to the tilt angle of the base 130. After the height adjustment cylinder 520 is activated, it can change the angle between the hinge rod 510 connecting the frame 111 and the connecting plate 420, thereby changing the height of the self-drive wheel 410 relative to the frame 111. This ensures that when the self-drive wheel 410 contacts the ground, the base 130 always remains horizontal, preventing the user from tipping over while using the wheelchair 100.

[0040] During the above-mentioned use, when the wheelchair 100 turns in areas with poor road conditions, the rotation angle of the self-rotating rod 620 can be adjusted through the control component 630, thereby driving the rotating bracket 610 to rotate. When the rotating bracket 610 rotates, the self-driving wheel 410 changes direction through the hinge rod 510 and the connecting plate 420. While changing the forward direction of the self-driving wheel 410, the above-mentioned height adjustment process can be repeated, which can stably complete the process of turning on a ramp and further prevent the user from tipping over when using the wheelchair 100.

[0041] Based on the above-described preferred embodiments of the present invention, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the inventive concept. The technical scope of this invention is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. An anti-tilt wheelchair, characterized in that: The wheelchair includes a control frame, several wheel assemblies symmetrically arranged on both sides of the control frame, and a height adjustment assembly connecting the wheel assemblies and the control frame. Each wheel assembly includes a self-driving wheel mounted on the control frame and a connecting plate mounted at the axle of the self-driving wheel. The height adjustment assembly includes several hinge rods connected between the connecting plate and the control frame, and a height adjustment cylinder. Both ends of each hinge rod are hinged to the connecting plate and the control frame, respectively. The connecting plate, the hinge rods, and the control frame, when connected, form a deformable multi-layered rectangular frame structure. Both ends of the height adjustment cylinder are hinged to the connecting plate and the control frame. Activation of the height adjustment cylinder controls the deformation of the multi-layered rectangular frame structure. The connecting plate and the self-driving wheel can move parallel to the center of gravity of the control frame. The wheelchair also includes an angle adjustment assembly, which includes a rotating bracket connected to the hinge rods, a self-rotating rod fixedly mounted on the rotating bracket, and a control mechanism for rotating the self-rotating rod. The rotating bracket is parallel to the connecting plate. The corresponding square frame structure has a hinge rod hinged to the side of the rotating bracket, and the cylinder body of the height adjustment cylinder hinged to the middle position of the rotating bracket. The hinge rod is connected to both sides of the connecting plate, and the height adjustment cylinder is connected to the middle position of the connecting plate. The rotating bracket has a curved rod, which is parallel to and corresponds to the support plate. The two ends of the curved rod are located close to the hinge rod. The control frame includes a suspension frame and a base. The base is mounted on the suspension frame. A control terminal is also provided on the plane of the base away from the human-shaped folding pad. The suspension frame includes a support plate mounted on the frame. The self-rotating rod is fixedly connected to the curved rod. The self-rotating rod can rotatably pass through the support plate. The rotation of the self-rotating rod can drive the rotating bracket to rotate. The rotating bracket can change the angle of the self-driving wheel relative to the support plate through the hinge rod and the connecting plate, thereby adjusting the rotation angle of the wheelchair. A level sensor is installed on the base. The level sensor is electrically connected to the self-driving wheel. The height adjustment cylinder, the control component, and the level sensor are all electrically connected to the control terminal.

2. The anti-tilt wheelchair according to claim 1, characterized in that: Both the hinge rod and the height adjustment cylinder are hinged to the suspension frame.

3. The anti-tilt wheelchair according to claim 2, characterized in that: The rotary wheel assembly also includes several auxiliary wheels, which are mounted on the self-driving wheel, and the diameter of the auxiliary wheels is smaller than that of the self-driving wheel.

4. The anti-tilt wheelchair according to claim 3, characterized in that: The auxiliary wheel is also installed at the end of the human-shaped folding pad.

5. The anti-tilt wheelchair according to claim 2, characterized in that: A power supply is installed on the support plate, and the power supply is electrically connected to the self-driving wheel.

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