High-stability stair climbing wheelchair

Abstract

The invention discloses a high-stability stair-climbing wheelchair, and relates to the technical field of stair-climbing wheelchairs, the high-stability stair-climbing wheelchair comprises a wheelchair body, mounting plates are fixedly connected to four corners of the bottom of the wheelchair body, circular center frames are arranged on the sides, away from each other, of the same longitudinal mounting plate, and stair-climbing star wheels are annularly arranged on the outer ring sides of the circular center frames at equal intervals; guard plates are symmetrically and fixedly connected to the two sides of the circular center frame, the wheelchair further comprises a star wheel dimension adaptive stabilizing mechanism and an airflow auxiliary star wheel optimizing mechanism, the position of a star wheel can be automatically adjusted according to the distance between different stairs, it is ensured that the stair climbing star wheel and the stair face are kept in stable contact in the stair climbing process of the wheelchair body, and the wheelchair is more stable in stair climbing. Shaking and bumping caused by mismatching of the distances are reduced, so that the riding comfort and safety are improved, and the stability and safety of the wheelchair body in the stair climbing process are improved.

Description

Technical Field

[0001] The invention relates to the technical field of stair-climbing wheelchairs, and in particular to a high-stability stair-climbing wheelchair. Background Art

[0002] In the prior art, a stair-climbing wheelchair is a special wheelchair designed for people with limited mobility and has the function of climbing stairs. The star wheel, as a key technology or structure of a stair-climbing wheelchair, can help the wheelchair move forward steadily on complex terrains such as stairs, realize the stair climbing function, and provide a convenient and safe solution for people with limited mobility to go up and down stairs.

[0003] Traditional wheelchair stair climbing devices often adopt fixed structures or limited adjustment ranges, which make it difficult to accurately match the differences in step heights of different stairs. As a result, during the climbing process, the gap between the climbing star wheels of the wheelchair and the stair surface is easily too large or too small, which not only reduces the climbing efficiency of the wheelchair, but also easily causes shaking and bumps, affecting the comfort and safety of the passengers. Although some wheelchair stair climbing devices on the market provide spacing adjustment functions, their adjustment mechanisms are often complicated and cumbersome, and often need to be implemented manually or through complex mechanical structures. Not only is the operation inconvenient, but the adjustment accuracy is also difficult to guarantee. If the star wheels cannot move synchronously during the adjustment of the climbing star wheel spacing, misalignment will occur between the star wheels, which will in turn affect the balance and stability of the entire wheelchair stair climbing device. This imbalance not only aggravates the shaking and bumps during the ride, but also causes mechanical failures or safety accidents.

[0004] In view of this, the present invention proposes a high-stability stair climbing wheelchair to compensate for and improve the deficiencies of the prior art. Summary of the invention

[0005] In order to solve the above technical problems, the present invention provides a high-stability stair-climbing wheelchair to solve the corresponding technical problems raised in the above background technology.

[0006] To achieve the above purpose, the technical solution adopted by the present invention is: a high-stability stair-climbing wheelchair, comprising a wheelchair body, wherein the four corners of the bottom of the wheelchair body are fixedly connected to mounting plates, a circular center frame is arranged on the side away from the mounting plate in the same longitudinal direction, and the outer ring side of the circular center frame is annularly and equidistantly arranged with stair-climbing star wheels, and guard plates are symmetrically fixedly connected to the two sides of the circular center frame, and also includes: a star wheel dimension adaptation and stabilization mechanism and an airflow auxiliary star wheel optimization mechanism, and the star wheel dimension adaptation and stabilization mechanism is arranged between the circular center frame and the stair-climbing star wheel, and the airflow auxiliary star wheel optimization mechanism is arranged between the circular center frame and the mounting plate; The star wheel dimension adaptation and stabilization mechanism is used to adapt and stabilize the overall star wheel dimension of the climbing star wheel before the climbing star wheel climbs stairs, and to provide stable support for the climbing star wheel during the climbing star wheel climbing stairs; The airflow-assisted star wheel optimization mechanism is used to synchronously introduce air during the climbing process of the climbing star wheel and use a non-contact design to circulate and optimize the surface of the climbing star wheel.

[0007] Preferably, the star wheel dimension adaptation and stabilization mechanism includes a circular inner frame coaxially arranged inside the circular center frame, fixed columns are annularly and equidistantly fixedly connected between the circular inner frame and the circular center frame, a cylinder is coaxially arranged inside the circular inner frame, and the end of the fixed column away from the circular center frame passes through the circular inner frame and is fixedly connected to the cylinder.

[0008] Preferably, the outer surface of the cylinder is provided with cylindrical grooves at equal intervals in an annular shape, and a slide plate is slidably connected to the circular inner frame and the circular center frame in an annular shape and at equal intervals, and the end of the slide plate away from the cylinder is fixedly connected to the climbing star wheel, and a telescopic rod and a first return spring are respectively fixedly connected between the slide plate and the cylindrical groove, and the first return spring is sleeved on the outer surface of the telescopic rod.

[0009] Preferably, a rotating shaft is connected between the guard plates in an annular and equidistant manner, a transmission member is connected between the rotating shafts, a driving gear is fixedly connected to the outer surface of the rotating shaft, and the driving gear is arranged between the circular inner frame and the circular center frame, and a driven gear plate is fixedly connected to the side of the slide plate facing the driving gear, and the driven gear plate is meshingly connected to the driving gear.

[0010] Preferably, a sliding groove is provided on the stair climbing star wheel, a sliding rod is fixedly connected in the sliding groove, a first connecting frame is slidably connected to the outer surface of the sliding rod, a second return spring is symmetrically fixedly connected between the first connecting frame and the sliding groove, and the second return spring is sleeved on the outer surface of the sliding rod, the outer surface of the circular center frame is annularly and equidistantly fixedly connected with the second connecting frame, and a first linkage plate is rotatably connected between the second connecting frame and the first connecting frame.

[0011] Preferably, the airflow-assisted star wheel optimization mechanism includes a linkage shaft rotatably connected between one of the guard plates and the mounting plate, a linkage gear is fixedly connected to the outer surface of the linkage shaft, and a driven shaft is also rotatably connected to the side of the mounting plate facing the guard plate, a driven gear is fixedly connected to the middle outer surface of the driven shaft, and the driven gear has a smaller diameter than the linkage gear, and the driven gear is meshingly connected to the linkage gear.

[0012] Preferably, the outer surface of the driven shaft at one end away from the mounting plate is fixedly connected to a driven disc, the side of the driven disc away from the driven gear is fixedly connected to a shift rod eccentrically, the outer surface of the shift rod is rotatably connected to a second linkage plate, and the end of the second linkage plate away from the shift rod is rotatably connected to a third linkage plate.

[0013] Preferably, the end of the third linkage plate away from the second linkage plate is rotatably connected to a connecting shaft, the outer surface of the end of the connecting shaft away from the third linkage plate is fixedly connected to a connecting block, the end of the connecting block away from the connecting shaft is fixedly connected to a fixed plate, and the side of the fixed plate away from the connecting block is fixedly connected to a piston rod.

[0014] Preferably, the mounting plate is fixedly connected to a fixing frame on the side facing the guard plate, a T-shaped piston cylinder is fixedly connected to the fixing frame, an end of the T-shaped piston cylinder facing the stair climbing star wheel is fixedly connected to an air nozzle, the piston rod is movably connected in the T-shaped piston cylinder, a third return spring is fixedly connected between the T-shaped piston cylinder and the fixing plate, and the third return spring is sleeved on the outer surface of the piston rod.

[0015] Preferably, a protective cover is fixedly connected to the side of the mounting plate facing the guard plate, the linkage shaft is rotatably connected to the lower end of the protective cover, and the T-shaped piston cylinder and the fixing frame are both fixedly connected to the upper end of the protective cover.

[0016] Compared with the prior art, the present invention has the following beneficial effects: (1) By setting up a star wheel dimension adaptation stabilization mechanism and utilizing the meshing drive design of the active gear on the driven gear plate, the sliding plate can be moved between the circular center frame and the circular inner frame, thereby changing the distance between the climbing star wheel and the center of the cylinder, so that the star wheel position can be automatically adjusted according to the distance of different stairs, ensuring that the climbing star wheel and the stair surface of the wheelchair body maintain stable contact during the climbing process, reducing the shaking and bumping caused by the mismatched distance, thereby improving the riding comfort and safety, and increasing the stability and safety of the wheelchair body during the climbing process. The meshing transmission between the active gear and the driven gear plate realizes the synchronous movement of the climbing star wheel, ensuring the balance and consistency during the adjustment process, and reducing the risk of failure caused by the misalignment of a single climbing star wheel.

[0017] (2) The first connecting frame slides in the slide groove, and the sliding rod and the second return spring cooperate to ensure the stability of the climbing star wheel during movement. No matter how the position of the climbing star wheel changes, this design can maintain its stable connection with the overall structure to prevent shaking or falling off due to position changes. The design of the first linkage plate and the second connecting frame further enhances the supporting effect, so that the climbing star wheel can be supported more evenly when subjected to force, thereby improving the stability of the overall structure. Among them, through the sliding of the first connecting frame in the slide groove and the through sliding on the slide rod, combined with the compression and extension of the second return spring, this design ensures the stability of the climbing star wheel during movement, so that no matter what position the climbing star wheel is in, it can maintain a close connection with the slide plate through the elastic force of the second return spring, reducing shaking or detachment caused by position changes, thereby improving the smoothness of the overall climbing process.

[0018] (3) Through the setting of the airflow-assisted star wheel optimization mechanism, when using the climbing star wheel for climbing stairs, the meshing between gears of different diameters is utilized to drive the piston rod to slide back and forth in the T-shaped piston cylinder, and the external air is blown from the wind nozzle to the surface of the climbing star wheel in the form of airflow, forming an airflow barrier on the surface of the climbing star wheel, reducing the resistance and friction caused by external environmental factors during the climbing process, making the wheelchair body smoother and more efficient when climbing stairs, effectively ensuring the overall stability of the wheelchair body during the climbing process, reducing safety hazards caused by shaking or bumps, and improving the safety and comfort of the passengers. By adopting the gas circulation method, the outer surface of the climbing star wheel can be optimized non-contactly, which avoids the wear and failure caused by traditional mechanical contact, thereby extending the service life of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of a preferred embodiment of the present invention; Figure 2 It is a schematic diagram of the structure of the connection between the stair climbing star wheel and the circular center frame shown in the present invention; Figure 3 It is a schematic diagram of the structure of the connection between the circular center frame and the circular inner frame shown in the present invention; Figure 4 The present invention shows Figure 3 The enlarged structural diagram at A in the middle; Figure 5 It is a structural schematic diagram of the first linkage plate connection of the present invention; Figure 6 It is a schematic diagram of the structure of the connection of the mounting plate shown in the present invention; Figure 7 The present invention shows Figure 6 The enlarged structural diagram at B in the middle; Figure 8 The present invention shows Figure 6 The enlarged structural diagram at C in the middle; Fig. 9 It is a schematic diagram of the structure of the connection between the linkage gear and the driven gear shown in the present invention.

[0020] The numbers in the figure are: 1. Wheelchair body; 2. Mounting plate; 3. Circular center frame; 4. Guard plate; 5. Stair climbing star wheel; 6. Star wheel dimension adaptation stabilization mechanism; 601. circular inner frame; 602. slide plate; 603. fixed column; 604. cylinder; 605. cylindrical groove; 606. telescopic rod; 607. first return spring; 608. driven gear plate; 609. driving gear; 610. rotating shaft; 611. transmission member; 612. slide groove; 613. slide rod; 614. second return spring; 615. first connecting frame; 616. first linkage plate; 617. second connecting frame; 7. Airflow-assisted star wheel optimization mechanism; 701. linkage shaft; 702. linkage gear; 703. driven shaft; 704. driven gear; 705. driven disc; 706. lever; 707. second linkage plate; 708. third linkage plate; 709. connecting shaft; 710. connecting block; 711. fixing plate; 712. third return spring; 713. piston rod; 714. T-shaped piston cylinder; 715. fixing frame; 716. air nozzle; 717. protective cover. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] Embodiments of the present invention: Please refer to Figures 1 to 9 As shown, a high-stability stair-climbing wheelchair comprises a wheelchair body 1, mounting plates 2 are fixedly connected at the four corners of the bottom of the wheelchair body 1, a circular center frame 3 is arranged on the side away from the same longitudinal mounting plate 2, stair-climbing star wheels 5 are arranged in a ring shape and equidistantly on the outer ring side of the circular center frame 3, and guard plates 4 are symmetrically fixedly connected on both sides of the circular center frame 3, and also include: a star wheel dimension adaptation and stabilization mechanism 6 and an airflow-assisted star wheel optimization mechanism 7, and the star wheel dimension adaptation and stabilization mechanism 6 is arranged between the circular center frame 3 and the stair-climbing star wheel 5, and the airflow-assisted star wheel optimization mechanism 7 is arranged between the circular center frame 3 and the mounting plate 2.

[0023] The star wheel dimension adaptation and stabilization mechanism 6 is used to adapt and stabilize the overall star wheel dimension of the climbing star wheel 5 before the climbing star wheel 5 climbs stairs, and to provide stable support for the climbing star wheel 5 during the climbing process.

[0024] The airflow-assisted star wheel optimization mechanism 7 is used to synchronously introduce air during the climbing process of the climbing star wheel 5 to circulate and optimize the surface of the climbing star wheel 5 using a non-contact design.

[0025] The star wheel dimension adaptation stabilization mechanism 6 includes a circular inner frame 601 coaxially arranged inside the circular center frame 3, and fixed columns 603 are fixedly connected to the circular inner frame 601 and the circular center frame 3 in a ring shape with equal intervals. A cylinder 604 is coaxially arranged inside the circular inner frame 601, and the end of the fixed column 603 away from the circular center frame 3 passes through the circular inner frame 601 and is fixedly connected to the cylinder 604.

[0026] The outer surface of the cylinder 604 is annularly and equidistantly provided with cylindrical grooves 605, and a slide plate 602 is slidably connected to the circular inner frame 601 and the circular center frame 3 in annular shape and equidistantly penetrates the circular center frame 3, and the end of the slide plate 602 away from the cylinder 604 is fixedly connected to the stair climbing star wheel 5, and a telescopic rod 606 and a first return spring 607 are fixedly connected between the slide plate 602 and the cylindrical groove 605, respectively, and the first return spring 607 is sleeved on the outer surface of the telescopic rod 606.

[0027] There are rotating shafts 610 connected in an annular and equidistant manner between the guard plates 4, and there are transmission members 611 connected between the rotating shafts 610. One of the rotating shafts 610 is fixedly connected to the output end of the external drive motor. By starting the external drive motor, one of the rotating shafts 610 can be driven to rotate between the two guard plates 4, so that the transmission effect of the transmission member 611 can be utilized to make the annularly distributed rotating shafts 610 rotate synchronously. A driving gear 609 is fixedly connected to the outer surface of the rotating shaft 610, and the driving gear 609 is arranged between the circular inner frame 601 and the circular center frame 3. A driven gear plate 608 is fixedly connected to the side of the slide plate 602 facing the driving gear 609, and the driven gear plate 608 is meshed with the driving gear 609.

[0028] A sliding groove 612 is provided on the stair climbing star wheel 5, and a sliding rod 613 is fixedly connected in the sliding groove 612. A first connecting frame 615 is slidably connected to the outer surface of the sliding rod 613. A second return spring 614 is symmetrically fixedly connected between the first connecting frame 615 and the sliding groove 612, and the second return spring 614 is sleeved on the outer surface of the sliding rod 613. A second connecting frame 617 is fixedly connected to the outer surface of the circular center frame 3 in an annular shape and equidistantly, and a first linkage plate 616 is rotatably connected between the second connecting frame 617 and the first connecting frame 615.

[0029] The effects achieved by this embodiment are as follows: compared with the prior art, through the setting of the star wheel dimension adaptation stabilization mechanism 6 and the meshing drive design of the driving gear 609 on the driven tooth plate 608, the slide plate 602 can be moved through the circular center frame 3 and the circular inner frame 601, thereby changing the distance between the climbing star wheel 5 and the center of the cylinder 604, so that the star wheel position can be automatically adjusted according to the distance between different stairs, ensuring that the climbing star wheel 5 of the wheelchair body 1 maintains stable contact with the stair surface during the climbing process, reducing the shaking and bumping caused by the mismatched spacing, thereby improving the riding comfort and safety, and increasing the stability and safety of the wheelchair body 1 during the climbing process, and the meshing transmission between the driving gear 609 and the driven tooth plate 608 to achieve the synchronous movement of the climbing star wheel 5, ensuring the balance and consistency during the adjustment process, and reducing the risk of failure caused by the misalignment of a single climbing star wheel 5.

[0030] In addition, through the sliding of the first connecting frame 615 in the slide groove 612, and the coordinated use of the slide rod 613 and the second return spring 614, the stability of the climbing star wheel 5 during movement is ensured. No matter how the position of the climbing star wheel 5 changes, this design can maintain its firm connection with the overall structure to prevent shaking or falling off due to position changes. The design of the first linkage plate 616 and the second connecting frame 617 further enhances the supporting effect, so that the climbing star wheel 5 can obtain more even support when subjected to force, thereby improving the stability of the overall structure.

[0031] Among them, through the sliding of the first connecting frame 615 in the slide groove 612 and the penetrating sliding on the slide rod 613, combined with the compression and extension of the second return spring 614, this design ensures the stability of the climbing star wheel 5 during the movement, so that no matter what position the climbing star wheel 5 is in, it can maintain a close connection with the slide plate 602 through the elastic force of the second return spring 614, reduce the shaking or separation caused by position changes, and thus improve the stability of the overall climbing process.

[0032] Further examples: Please refer to Figures 1 to 9 As shown, the airflow-assisted star wheel optimization mechanism 7 includes a linkage shaft 701 rotatably connected between one of the guard plates 4 and the mounting plate 2, a linkage gear 702 is fixedly connected to the outer surface of the linkage shaft 701, and a driven shaft 703 is also rotatably connected to the side of the mounting plate 2 facing the guard plate 4, a driven gear 704 is fixedly connected to the middle outer surface of the driven shaft 703, and the driven gear 704 has a smaller diameter than the linkage gear 702, and the driven gear 704 is meshingly connected to the linkage gear 702.

[0033] A driven disc 705 is fixedly connected to the outer surface of one end of the driven shaft 703 away from the mounting plate 2, a shift rod 706 is fixedly connected eccentrically to the side of the driven disc 705 away from the driven gear 704, a second linkage plate 707 is rotatably connected to the outer surface of the shift rod 706, and a third linkage plate 708 is rotatably connected to the end of the second linkage plate 707 away from the shift rod 706.

[0034] One end of the third linkage plate 708 away from the second linkage plate 707 is rotatably connected to a connecting shaft 709, the outer surface of one end of the connecting shaft 709 away from the third linkage plate 708 is fixedly connected to a connecting block 710, one end of the connecting block 710 away from the connecting shaft 709 is fixedly connected to a fixing plate 711, and one side of the fixing plate 711 away from the connecting block 710 is fixedly connected to a piston rod 713.

[0035] A fixing frame 715 is fixedly connected to the side of the mounting plate 2 facing the guard plate 4, a T-shaped piston cylinder 714 is fixedly connected to the fixing frame 715, an end of the T-shaped piston cylinder 714 facing the stair climbing star wheel 5 is fixedly connected to a wind nozzle 716, a piston rod 713 is movably connected in the T-shaped piston cylinder 714, a third return spring 712 is fixedly connected between the T-shaped piston cylinder 714 and the fixing plate 711, and the third return spring 712 is sleeved on the outer surface of the piston rod 713.

[0036] A protective cover 717 is also fixedly connected to the side of the mounting plate 2 facing the guard plate 4 , the linkage shaft 701 penetrates and is rotatably connected to the lower end of the protective cover 717 , and the T-shaped piston cylinder 714 and the fixing frame 715 penetrate and are fixedly connected to the upper end of the protective cover 717 .

[0037] The effects achieved by this embodiment are as follows: compared with the prior art, through the setting of the airflow-assisted star wheel optimization mechanism 7, in the process of using the climbing star wheel 5 for climbing stairs, the meshing between gears of different diameters is utilized to drive the piston rod 713 to slide back and forth in the T-shaped piston cylinder 714, and the external air is blown from the wind nozzle 716 to the surface of the climbing star wheel 5 in the form of airflow, forming a layer of airflow barrier on the surface of the climbing star wheel 5, reducing the resistance and friction caused by external environmental factors in the climbing star wheel 5 during the climbing process, making the wheelchair body 1 smoother and more efficient when climbing stairs, effectively ensuring the overall stability of the wheelchair body 1 during the climbing process, reducing safety hazards caused by shaking or bumping, and improving the safety and comfort of the passengers. By adopting the gas circulation method, the outer surface of the climbing star wheel 5 can be optimized non-contactly, which avoids the wear and failure caused by traditional mechanical contact, thereby extending the service life of the equipment.

[0038] The complete usage steps and working principle of the above embodiment are as follows: The following is a working process of the star wheel dimension adaptation and stabilization mechanism 6 adapting and stabilizing the overall star wheel dimension of the climbing star wheel 5 before the climbing star wheel 5 climbs stairs, and providing stable support for the climbing star wheel 5 during the climbing star wheel 5: When the user uses the stair climbing wheelchair (wheelchair body 1) to climb stairs, the position of the climbing star wheel 5 can be adjusted according to the actual situation of the stair steps. First, since the two guard plates 4 are arranged with rotating shafts 610 that are the same in number as the climbing star wheels 5 in an annular and equidistant manner, and one of the rotating shafts 610 is fixedly connected to the output end of the external drive motor, such as Figure 2 , Figure 3 as well as Figure 4As shown, a transmission member 611 is connected between the rotating shafts 610. When the position of the climbing star wheel 5 needs to be adjusted, the operation of the external drive motor can be started to drive one of the rotating shafts 610 fixedly connected to its output end to rotate between the two guard plates 4. Through the transmission member 611 arranged between the rotating shafts 610, under the transmission action of the transmission member 611, the remaining rotating shafts 610 can be driven to rotate synchronously between the two guard plates 4. Because a driving gear 609 is fixedly arranged on the outer surface of the rotating shaft 610, when the rotating shaft 610 rotates, the driving gear 609 can be driven to rotate synchronously between the circular center frame 3 and the circular inner frame 601 with the rotating shaft 610 as the axis. Since there are slidable rings equidistantly penetrating the circular center frame 3 and the circular inner frame 601, The slide plate 602 is fixedly connected to the stair climbing star wheel 5 at one end of the slide plate 602 located on the outside of the circular center frame 3, and the telescopic rod 606 and the first return spring 607 are fixedly connected between the end of the slide plate 602 located on the inside of the circular inner frame 601 and the cylinder 604, and the slide plate 602 is fixedly provided with a driven tooth plate 608 meshing with the driving gear 609 on the side facing the driving gear 609, and the driving gear 609 is arranged between the circular center frame 3 and the circular inner frame 601. When the rotating shaft 610 rotates synchronously to drive the driving gear 609 to rotate, the position of the driven tooth plate 608 can be driven to move synchronously through the meshing of the teeth, so that the slide plate 602 can slide through between the circular center frame 3 and the circular inner frame 601. The plate 602 is fixedly connected to the stair climbing star wheel 5, so during the movement of the slide plate 602, the position of the stair climbing star wheel 5 can be synchronously driven to adjust, so that the stair climbing star wheel 5 moves away from or close to the center of the circular center frame 3 (i.e., where the cylinder 604 is located), thereby changing the distance between the stair climbing star wheel 5 and the cylinder 604, thereby changing the diameter of the overall structure composed of multiple stair climbing star wheels 5 connected together, thereby changing the size of the overall structure of the stair climbing star wheel 5, so that the position of the stair climbing star wheel 5 can be adjusted according to the difference in step heights of different stairs, and by adjusting the position of the stair climbing star wheel 5, that is, changing the distance between them and the cylinder 604 (i.e., the center of the circular center frame 3), the overall structure composed of multiple stair climbing star wheels 5 is changed. The diameter of the body structure enables the wheelchair body 1 to better adapt to stairs of different heights. When the diameter of the climbing star wheel 5 increases, they can more effectively support the wheelchair body 1 on higher steps. On the contrary, when the diameter of the climbing star wheel 5 decreases, it can better adapt to lower steps. This adaptive adjustment reduces the bumps and instability of the wheelchair body 1 caused by the change in step height during the climbing process, thereby ensuring the stability and safety of the wheelchair body 1 during the climbing process. Since one of the rotating shafts 610 is fixedly connected to the output end of the external drive motor, and the driving gear 609 is fixedly arranged on the outer surface of the rotating shaft 610, when adjusting the position of the climbing star wheel 5, the tooth meshing connection setting between the driving gear 609 and the driven gear plate 608 is utilized.After the driving gear 609 rotates and drives the driven gear plate 608 to move, the position of the driven gear plate 608 can be limited, and the synchronous movement of the climbing star wheel 5 is achieved through the meshing transmission between the driving gear 609 and the driven gear plate 608, thereby ensuring the balance and consistency during the adjustment process and reducing the risk of failure caused by the misalignment of a single climbing star wheel 5.

[0039] During the process in which the driving gear 609 rotates and engages to drive the driven gear plate 608 to move through between the circular center frame 3 and the circular inner frame 601, as shown in FIG. Figure 5 As shown, since a slide groove 612 is provided on the climbing star wheel 5, a first connecting frame 615 is slidably arranged in the slide groove 612, and a second connecting frame 617 is fixedly arranged in an annular shape and equidistantly on the outer surface of the circular center frame 3, and a first linkage plate 616 is rotatably arranged between the second connecting frame 617 and the first connecting frame 615. When the slide plate 602 is driven by the driven gear plate 608 to synchronously move through between the circular center frame 3 and the circular inner frame 601, the climbing star wheel 5 installed thereon is synchronously driven to move. At this time, the position of the slide groove 612 changes synchronously, and the first connecting frame 615 will slide synchronously in the slide groove 612. Since a sliding rod 613 is fixedly arranged in the slide groove 612, a second connecting frame 615 is symmetrically fixedly arranged between the first connecting frame 615 and the slide groove 612. The return spring 614 and the second return spring 614 are sleeved on the outer surface of the sliding rod 613, and the sliding rod 613 is slidably arranged on the first connecting frame 615. As the position of the climbing star wheel 5 changes, the first connecting frame 615 not only slides in the sliding groove 612, but also synchronously slides on the outer surface of the sliding rod 613, compressing and stretching the second return springs 614 arranged on both sides thereof, so that the connection with the climbing star wheel 5 can be always maintained, and when the climbing star wheel 5 is used to climb stairs, the design of the first connecting frame 615, the first linkage plate 616 and the second connecting frame 617 can be used to support the climbing star wheel 5 accordingly, thereby further improving the overall stability of the climbing star wheel 5 when climbing stairs.

[0040] Among them, through the sliding of the first connecting frame 615 in the slide groove 612 and the penetrating sliding on the slide rod 613, combined with the compression and extension of the second return spring 614, this design ensures the stability of the climbing star wheel 5 during the movement, so that no matter what position the climbing star wheel 5 is in, it can maintain a close connection with the slide plate 602 through the elastic force of the second return spring 614, reduce the shaking or separation caused by position changes, and thus improve the stability of the overall climbing process.

[0041] Please refer to the above working process Figures 1 to 9 .

[0042] The following is the working process of the airflow-assisted star wheel optimization mechanism 7 synchronously introducing air to circulate and optimize the surface of the climbing star wheel 5 using a non-contact design during the climbing process of the climbing star wheel 5: When using the wheelchair body 1 to climb stairs, Figure 2 , Figures 6 to 9 As shown, a linkage shaft 701 is arranged between one of the guard plates 4 arranged toward the mounting plate 2 and the lower end of the mounting plate 2, and one end of the linkage shaft 701 is rotatably arranged on the mounting plate 2, and the other end of the linkage shaft 701 is fixedly arranged on the guard plate 4, and a linkage gear 702 is fixedly arranged on the outer surface of the linkage shaft 701, and a driven shaft 703 is rotatably arranged above the linkage shaft 701 through the mounting plate 2, and a driven gear 704 with a diameter smaller than the linkage gear 702 and meshingly connected to the linkage gear 702 is fixedly arranged on the outer surface of the driven shaft 703. It should be noted here that the guard plates 4 are symmetrically fixedly arranged on the circular center frame 3, one of the guard plates 4 is fixedly connected to the linkage shaft 701, and the other guard plate 4 is fixedly connected to the output end of the external controller. When climbing stairs, it can be started by the control of the external controller to drive the guard plate 4 connected thereto to rotate synchronously. At this time, the circular center frame 3 The circular center frame 3 rotates synchronously, thereby driving the climbing star wheel 5 to rotate synchronously with the cylinder 604 as the center, so as to complete the climbing movement. When the circular center frame 3 rotates, the guard plate 4 arranged on the other side of the circular center frame 3 will also rotate synchronously, thereby driving the linkage shaft 701 to rotate synchronously with the guard plate 4 and the mounting plate 2. When the linkage shaft 701 rotates, the linkage gear 702 installed thereon rotates synchronously with the axis of the linkage shaft 701 as the center. Because the driven gear 704 is meshingly arranged above the linkage gear 702, the driven gear 704 can be driven to rotate synchronously with the axis of the driven shaft 703 as the center through the meshing between the teeth. (It should be noted here that since the diameter of the linkage gear 702 is larger than that of the driven gear 704, when the linkage gear 702 rotates one circle, the driven gear 704 can be driven to rotate multiple circles). Figure 6 and Figure 7 As shown, because a driven disc 705 is fixedly provided on the outer surface of the driven shaft 703, and a lever 706 is fixedly provided eccentrically on the disc surface of the driven disc 705 away from the driven gear 704, when the linkage gear 702 rotates to drive the driven gear 704 to rotate synchronously with the driven shaft 703 set on its axis, the driven disc 705 synchronously follows and rotates around the axis of the driven shaft 703, thereby changing the position of the lever 706, and because a second linkage plate 707 is rotatably provided on the outer surface of the lever 706, a third linkage plate 708 is rotatably provided on one end of the second linkage plate 707 away from the lever 706, and a connecting shaft 709 is rotatably provided on one end of the third linkage plate 708 away from the second linkage plate 707, and the connecting shaft 709 is fixedly provided on the connecting block 710, as shown in FIG. Figure 8As shown, when the lever 706 changes its position following the rotation of the driven disc 705, the second linkage plate 707 and the third linkage plate 708 can pull the connecting block 710 to move synchronously. Since a fixing frame 715 is fixedly provided on the side of the mounting plate 2 facing the guard plate 4, and a T-shaped piston cylinder 714 is fixedly provided on the fixing frame 715, and a fixing plate 711 is fixedly provided on the connecting block 710, and a piston rod 713 slidably connected to the inside of the T-shaped piston cylinder 714 is fixedly provided on the fixing plate 711, The fixing plate 711 is fixedly connected to the T-shaped piston cylinder 714 with a third return spring 712 sleeved on the outside of the piston rod 713. Therefore, when the second linkage plate 707 and the third linkage plate 708 drive the connecting block 710 to move synchronously, since the T-shaped piston cylinder 714 is a fixed design, under the connection of the fixing plate 711, the piston rod 713 can be synchronously driven to move back and forth in the T-shaped piston cylinder 714. At the same time, the third return spring 712 will also stretch and contract synchronously. In this process, it should be noted that Figure 2 and Figure 6As shown, a side of the upper end of the T-shaped piston cylinder 714 facing the stair climbing star wheel 5 (i.e., away from the mounting plate 2) is fixedly connected with an air nozzle 716, and a one-way air outlet valve is provided at the connection between the upper end of the T-shaped piston cylinder 714 and the air nozzle 716, and a one-way air inlet valve is provided at the end of the T-shaped piston cylinder 714 away from the air nozzle 716. When the piston rod 713 moves in the direction away from the T-shaped piston cylinder 714 inside the T-shaped piston cylinder 714, it is in the intake state, at which time external air will enter the interior of the T-shaped piston cylinder 714 through the one-way air inlet valve, and when the piston rod 713 moves in the direction close to the T-shaped piston cylinder 714 inside the T-shaped piston cylinder 714, it is in the exhaust state, at which time external air entering the interior of the T-shaped piston cylinder 714 will pass through the one-way air outlet valve to the air nozzle. The air is discharged in the direction of the nozzle 716, and finally blown toward the outer surface of the climbing star wheel 5 by the setting of the wind nozzle 716, thereby forming a contactless design. When used outdoors or in a complex environment, the surface of the climbing star wheel 5 often adheres to some tiny sand, dirt or other impurities. If these tiny particles accumulate on the surface of the climbing star wheel 5 for a long time and are not processed and optimized in time, the friction and resistance of the climbing star wheel 5 when in use will be increased, thereby affecting the rotation efficiency of the climbing star wheel 5. In a humid or rainy environment, moisture will often remain on the surface of the stair steps to form a wet layer. When the climbing star wheel 5 contacts the wet steps, the friction coefficient between the contact surfaces will change due to the presence of moisture, which can easily cause the climbing star wheel 5 to slip or produce The air circulation method can remove these particles in time, thereby optimizing the outer surface of the climbing star wheel 5, avoiding the deviation of the climbing star wheel 5 due to the influence of the particles when climbing stairs, and interfering with the climbing movement of the wheelchair body 1. At the same time, it can also promote the circulation of air on the outer surface of the climbing star wheel 5, accelerate the volatilization of water, and make the wet and adhered water and particles gradually separate from the outer surface of the climbing star wheel 5, thereby avoiding interfering with the climbing movement of the climbing star wheel 5. In this process, the present design uses the meshing between gears of different diameters to drive the piston rod 713 to move in the T-shaped piston cylinder 71 through the arrangement of the airflow auxiliary star wheel optimization mechanism 7 when using the climbing star wheel 5 to climb stairs. 4 reciprocates and blows external air from the air nozzle 716 to the surface of the climbing star wheel 5 in the form of airflow, so as to remove particles adhered to the outer surface of the climbing star wheel 5. When the climbing star wheel 5 contacts the stair steps, these particles increase the roughness of the contact surface, thereby increasing the friction and resistance, affecting the rotation efficiency and stability of the climbing star wheel 5. By synchronously blowing air during the climbing process, these adhered particles are synchronously removed, which can effectively reduce the resistance and friction of the climbing star wheel 5 during the climbing process, making the wheelchair body 1 smoother and more efficient when climbing stairs, effectively ensuring the overall stability of the wheelchair body 1 during the climbing process, reducing the safety hazards caused by shaking or bumping, and improving the safety and comfort of the passengers.By adopting the gas circulation method, the outer surface of the climbing star wheel 5 can be optimized without contact, which avoids the wear and failure caused by traditional mechanical contact, thereby extending the service life of the equipment.

[0043] Please refer to the above working process Figures 1 to 9 .

[0044] The circuits and controls involved in the present invention are all prior art and will not be described in detail here.

[0045] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A high-stability stair-climbing wheelchair, comprising a wheelchair body (1), wherein the four corners of the bottom of the wheelchair body (1) are fixedly connected to mounting plates (2), a circular center frame (3) is arranged on the side away from the mounting plate (2) in the same longitudinal direction, and stair-climbing star wheels (5) are arranged in an annular shape and equidistantly on the outer ring side of the circular center frame (3), and guard plates (4) are symmetrically fixedly connected to the two sides of the circular center frame (3), characterized in that: It also includes: a star wheel dimension adaptation and stabilization mechanism (6) and an airflow-assisted star wheel optimization mechanism (7), wherein the star wheel dimension adaptation and stabilization mechanism (6) is arranged between the circular center frame (3) and the stair climbing star wheel (5), and the airflow-assisted star wheel optimization mechanism (7) is arranged between the circular center frame (3) and the mounting plate (2); The star wheel dimension adaptation and stabilization mechanism (6) is used to adapt and stabilize the overall star wheel dimension of the climbing star wheel (5) before the climbing star wheel (5) climbs stairs, and to provide stable support for the climbing star wheel (5) during the climbing process; The airflow-assisted star wheel optimization mechanism (7) is used to synchronously introduce air during the process of the climbing star wheel (5) climbing stairs, and to perform circulation optimization on the surface of the climbing star wheel (5) using a non-contact design.

2. A high-stability stair-climbing wheelchair according to claim 1, characterized in that: The star wheel dimension adaptation stabilization mechanism (6) comprises a circular inner frame (601) coaxially arranged inside the circular center frame (3), a fixing column (603) is annularly and equidistantly fixedly connected between the circular inner frame (601) and the circular center frame (3), a cylinder (604) is coaxially arranged inside the circular inner frame (601), and one end of the fixing column (603) away from the circular center frame (3) passes through the circular inner frame (601) and is fixedly connected to the cylinder (604).

3. A high-stability stair-climbing wheelchair according to claim 2, characterized in that: The outer surface of the cylinder (604) is provided with cylindrical grooves (605) at equal intervals in an annular shape, and a slide plate (602) is slidably connected to and penetrates the circular inner frame (601) and the circular center frame (3) in an annular shape at equal intervals, and one end of the slide plate (602) away from the cylinder (604) is fixedly connected to the stair climbing star wheel (5), and a telescopic rod (606) and a first return spring (607) are respectively fixedly connected between the slide plate (602) and the cylindrical groove (605), and the first return spring (607) is sleeved on the outer surface of the telescopic rod (606).

4. A high-stability stair-climbing wheelchair according to claim 3, characterized in that: The guard plates (4) are connected to rotating shafts (610) in an annular manner and equidistantly, and transmission members (611) are connected to the rotating shafts (610) in a transmission manner. A driving gear (609) is fixedly connected to the outer surface of the rotating shaft (610), and the driving gear (609) is arranged between the circular inner frame (601) and the circular center frame (3). A driven gear plate (608) is fixedly connected to the side of the slide plate (602) facing the driving gear (609), and the driven gear plate (608) is meshingly connected to the driving gear (609).

5. A high-stability stair-climbing wheelchair according to claim 2, characterized in that: The stair climbing star wheel (5) is provided with a slide groove (612), a slide rod (613) is fixedly connected in the slide groove (612), a first connecting frame (615) is slidably connected to the outer surface of the slide rod (613), a second return spring (614) is symmetrically fixedly connected between the first connecting frame (615) and the slide groove (612), and the second return spring (614) is sleeved on the outer surface of the slide rod (613), a second connecting frame (617) is fixedly connected to the outer surface of the circular center frame (3) in an annular shape at equal intervals, and a first linkage plate (616) is rotatably connected between the second connecting frame (617) and the first connecting frame (615).

6. A high-stability stair-climbing wheelchair according to claim 1, characterized in that: The airflow-assisted star-wheel optimization mechanism (7) comprises a linkage shaft (701) rotatably connected between one of the guard plates (4) and the mounting plate (2); a linkage gear (702) is fixedly connected to the outer surface of the linkage shaft (701); a driven shaft (703) is also rotatably connected to the side of the mounting plate (2) facing the guard plate (4); a driven gear (704) is fixedly connected to the outer surface of the middle portion of the driven shaft (703); the diameter of the driven gear (704) is smaller than the diameter of the linkage gear (702); and the driven gear (704) is meshingly connected to the linkage gear (702).

7. A high-stability stair-climbing wheelchair according to claim 6, characterized in that: A driven disc (705) is fixedly connected to the outer surface of one end of the driven shaft (703) away from the mounting plate (2); a shifting rod (706) is fixedly connected eccentrically to one side of the driven disc (705) away from the driven gear (704); a second linkage plate (707) is rotatably connected to the outer surface of the shifting rod (706); and a third linkage plate (708) is rotatably connected to one end of the second linkage plate (707) away from the shifting rod (706).

8. A high-stability stair-climbing wheelchair according to claim 7, characterized in that: One end of the third linkage plate (708) away from the second linkage plate (707) is rotatably connected to a connecting shaft (709); an outer surface of one end of the connecting shaft (709) away from the third linkage plate (708) is fixedly connected to a connecting block (710); one end of the connecting block (710) away from the connecting shaft (709) is fixedly connected to a fixing plate (711); and a side of the fixing plate (711) away from the connecting block (710) is fixedly connected to a piston rod (713).

9. A high-stability stair-climbing wheelchair according to claim 8, characterized in that: A fixing frame (715) is fixedly connected to the side of the mounting plate (2) facing the guard plate (4); a T-shaped piston cylinder (714) is fixedly connected to the fixing frame (715); an end of the T-shaped piston cylinder (714) facing the stair climbing star wheel (5) is fixedly connected to a ventilator (716); the piston rod (713) is movably connected to the T-shaped piston cylinder (714); a third return spring (712) is fixedly connected between the T-shaped piston cylinder (714) and the fixing plate (711); and the third return spring (712) is sleeved on the outer surface of the piston rod (713).

10. A high-stability stair-climbing wheelchair according to claim 8, characterized in that: A protective cover (717) is also fixedly connected to the side of the mounting plate (2) facing the guard plate (4); the linkage shaft (701) is rotatably connected to the lower end of the protective cover (717); and the T-shaped piston cylinder (714) and the fixing frame (715) are both fixedly connected to the upper end of the protective cover (717).

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