阅读说明：本技术 一种新型多功能轮椅 (Novel multifunctional wheelchair ) 是由 李博 雷星驰 赵斐然 于 2021-08-26 设计创作，主要内容包括：本发明具体揭示了一种新型多功能轮椅,包括座椅装置和移动装置,座椅装置在移动装置的顶面；座椅装置包括电动可调靠背、活动扶手、椅架、电动调节控制装置、活动扶腿、双曲柄结构；移动装置包括前轮、驱动轮、减震阻尼弹簧、后轮、驱动装置；可调靠背上连接有用于调节靠背角度的平行的双曲柄机构,双曲柄机构下端安装有后轮,椅架后侧铰接两根减震阻尼弹簧。本发明的新型多功能轮椅,可以让老人或残障人士有更好的体验。通过改变轮椅的靠背角度,可以使得老人或残障人士找到适合自己的靠背角度,同时,当靠背角度发生变化时,由于平行四边形机构的特性扶手也会和靠背一起移动并且保持水平状态,让使用者的手臂始终以最舒适的状态放在扶手上。(The invention particularly discloses a novel multifunctional wheelchair, which comprises a seat device and a moving device, wherein the seat device is arranged on the top surface of the moving device; the seat device comprises an electric adjustable backrest, a movable armrest, a seat frame, an electric adjusting control device, a movable leg support and a double-crank structure; the moving device comprises a front wheel, a driving wheel, a damping spring, a rear wheel and a driving device; the adjustable backrest is connected with a parallel double-crank mechanism for adjusting the angle of the backrest, the lower end of the double-crank mechanism is provided with a rear wheel, and the rear side of the chair frame is hinged with two damping springs. The novel multifunctional wheelchair can enable the old or the disabled to have better experience. Through changing the back angle of wheelchair, can make old man or disabled person find the back angle that is fit for oneself, simultaneously, when the back angle changes, because the characteristic handrail of parallelogram mechanism also can remove and keep the horizontality with the back together, let user's arm put on the handrail with the most comfortable state all the time.)

1. The novel multifunctional wheelchair is characterized by comprising a seat device and a moving device, wherein the seat device is arranged on the top surface of the moving device;

the seat device comprises an electric adjustable backrest (1), a movable armrest (2), a seat frame (3), an electric adjusting control device (4), a movable leg support (5) and a double-crank structure (15);

the moving device comprises a front wheel (6), a driving wheel (7), a damping spring (8), a rear wheel (9) and a driving device (10);

the adjustable backrest (1) is connected with a parallel double-crank mechanism (14) for adjusting the angle of the backrest, the lower end of the double-crank mechanism (14) is provided with a rear wheel (9), and the rear wheel (9) provides auxiliary support when the backrest is in a completely flattened state; the adjustable backrest (1) is hinged with the chair frame (3), two ends of the double-crank structure (15) are respectively hinged with the adjustable backrest (1) and the chair frame (3), the movable armrest (2) is fixedly arranged at the upper end of the double-crank structure (15), and the front end of the chair frame (3) is hinged with the upper ends of the movable armrest legs (5);

the front wheel (6) is arranged at the front end of the lower end of the chair frame (3), the driving device (10) is arranged in the chair frame (3), the driving wheel (7) is connected with the driving device (10) through a transmission shaft and is arranged on two sides of the chair frame (3), and the rear side of the chair frame (3) is hinged with two damping springs (8).

2. The novel multifunctional wheelchair as claimed in claim 1, wherein a backrest rod (20) is fixedly mounted on the double-crank structure (14), one end of the backrest rod (20) is hinged to a connecting rod (19), the other end of the connecting rod (19) is hinged to a crank (18), the other end of the crank (18) is fixedly connected with a worm wheel (11), the worm wheel (11) is in meshing transmission fit with a worm (12), one end of the worm (12) is connected with an output shaft of a motor (13), and according to the self-locking principle of the worm wheel (11) and the worm (12), the automatic adjustment of the angle of the electrically adjustable backrest (1) within the range of 90-180 degrees is realized by controlling the forward and reverse rotation of the motor (13).

3. The novel multifunctional wheelchair as claimed in claim 1, wherein: the electric adjusting device is characterized in that the movable handrail (2) is installed on a connecting rod of the double-crank structure (15), the double-crank structure (15) is a parallelogram mechanism, the movable handrail (2) is provided with an electric adjusting device (4), and the electric adjusting device (4) is electrically connected with a motor (13) and a first motor and a second motor in a driving device (10) and used for adjusting the rotating speed and the power on-off of the motor (13) and the first motor and the second motor.

4. The novel multifunctional wheelchair as claimed in claim 1, wherein the movable leg support (5) is rotatably connected with a pull rod (17), the chair frame (3) is fixedly provided with a hook plate (16), and the angle adjustment of the movable leg support (5) can be realized by hanging the pull rod (17) on the hook plate (16), wherein the adjustable angle range is 90-180 degrees.

5. A new multifunctional wheelchair in accordance with claim 1, characterized in that the driving wheel (7) is a pair of three planetary wheel mechanism, which realizes the function of climbing stairs by the rotation of the planetary carrier and the non-rotation of the tire.

Technical Field

The invention relates to the technical field of medical instruments, in particular to a novel multifunctional wheelchair.

Background

The appearance of the wheelchair provides great convenience for the old and the disabled to go out for activities, see a doctor and the like, but the wheelchair on the market at present has the problems of single function, narrow application range and the like. Therefore, the selection of the wheelchair is convenient to operate, safe and reliable to operate and has multiple functions, and the more functions of the wheelchair, the more convenient the old and the disabled to use. The wheel chair is provided with a reasonable mechanical structure, and the wheel chair is compact and light in structure, thereby achieving the purposes of multiple functions and multiple purposes. The research on the novel multifunctional wheelchair can provide convenience for the old and the disabled to go out for activities, see a doctor and the like, so that the novel multifunctional wheelchair has great application value.

Disclosure of Invention

Aiming at the defects of the prior art, the invention provides a novel multifunctional wheelchair.

In order to achieve the purpose, the invention provides the following technical scheme: a novel multifunctional wheelchair comprises a seat device and a moving device, wherein the seat device is arranged on the top surface of the moving device;

the seat device comprises an electric adjustable backrest, a movable armrest, a seat frame, an electric adjusting control device, a movable leg support and a double-crank structure;

the moving device comprises a front wheel, a driving wheel, a damping spring, a rear wheel and a driving device;

the adjustable backrest is connected with a parallel double-crank mechanism for adjusting the angle of the backrest, the lower end of the double-crank mechanism is provided with a rear wheel, and the rear wheel provides auxiliary support when the backrest is in a completely flattened state; the adjustable backrest is hinged with the chair frame, two ends of the double-crank structure are respectively hinged with the adjustable backrest and the chair frame, the movable armrest is fixedly arranged at the upper end of the double-crank structure, and the front end of the chair frame is hinged with the upper ends of the movable supporting legs;

the front wheel is arranged at the front end of the lower end of the chair frame, the driving device is arranged in the chair frame, the driving wheel is connected with the driving device through a transmission shaft and is arranged on two sides of the chair frame, and the rear side of the chair frame is hinged with two damping springs.

Preferably, the double-crank structure is fixedly provided with a backrest rod, one end of the backrest rod is hinged to the connecting rod, the other end of the connecting rod is hinged to the crank, the other end of the crank is fixedly connected with a worm wheel, the worm wheel is in meshing transmission fit with the worm, one end of the worm is connected with an output shaft of the motor, and the automatic adjustment of the electric adjustable backrest angle within the range of 90-180 degrees is realized by controlling the forward and reverse rotation of the motor according to the self-locking principle of the worm wheel and the worm.

Preferably, the movable handrail is installed on the connecting rod of double crank structure, the double crank structure is parallelogram mechanism, install the electricity adjusting device on the movable handrail, first motor and second motor in electricity adjusting device electric connection motor and the drive arrangement for the rotational speed and the break-make electricity of adjustment motor and first motor and second motor.

Preferably, the movable leg supporter is rotatably connected with a pull rod, the chair frame is fixedly provided with a hook plate, the pull rod is hung on the hook plate, so that the angle adjustment of the movable leg supporter can be realized, and the adjustable angle range is 90-180 degrees.

Preferably, the driving wheel is a pair of three-planetary-wheel mechanisms, and the stair climbing function is realized by the rotation of the planetary carrier and the non-rotation of the tire.

Compared with the prior art, the invention has the following beneficial effects:

1. the novel multifunctional wheelchair can realize the free adjustment of the backrest angle within the range of 90-180 degrees. When the backrest is completely unfolded and flat, the wheelchair becomes a simple bed, so that the old or the disabled can conveniently lie down to have a rest.

2. The novel multifunctional wheelchair can enable the old or the disabled to have better experience. Through changing the back angle of wheelchair, can make old man or disabled person find the back angle that is fit for oneself, simultaneously, when the back angle changes, because the characteristic handrail of parallelogram mechanism also can remove and keep the horizontality with the back together, let user's arm put on the handrail with the most comfortable state all the time. The adjusting mode is realized by adopting a motor to control the speed reducer, and the operation is more convenient.

3. The reducer is designed by adopting worm and gear transmission, not only because the transmission ratio is large, but also more importantly, the self-locking principle of the worm and gear is utilized, so that the purposes of stopping the motor and immediately locking the backrest are realized.

4. The leg support is adjustable. The leg support of the scheme can realize the adjustment angles of 30 degrees, 60 degrees and 90 degrees, and a user can freely adjust according to own conditions.

Drawings

FIG. 1 is a front view schematically illustrating the structure of a multifunctional wheelchair according to the present invention;

FIG. 2 is a schematic side view of a multifunctional wheelchair of the present invention;

FIG. 3 is a schematic side view of a multifunctional wheelchair of the present invention;

FIG. 4 is a schematic structural view of the backrest transmission mechanism of FIG. 3 of the new multifunctional wheelchair of the invention;

FIG. 5 is a schematic view of the adjustment of the movable leg support of the multifunctional wheelchair of the present invention;

FIG. 6 is a schematic view of the movable armrest of the multifunctional wheelchair of the present invention;

FIG. 7 is a schematic view of the parallel four-bar linkage movement of the novel multifunctional wheelchair of the present invention;

FIG. 8 is a diagram of a preset trajectory of a four-bar linkage of the new multifunctional wheelchair of the present invention;

FIG. 9 is a force analysis diagram of the backrest of the multifunctional wheelchair according to the present invention in a flattened state;

FIG. 10 is the movement principle of the driving wheel of the new multifunctional wheelchair of the invention;

fig. 11 shows the internal structure of the driving device of the novel multifunctional wheelchair.

Detailed Description

In the following description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of the various embodiments of the invention. It should be understood, however, that these physical details should not be construed as limiting the invention. That is, in some embodiments of the invention, such physical details are not necessary. In addition, some conventional structures and components are shown in simplified schematic form in the drawings.

In addition, the descriptions related to the first, the second, etc. in the present invention are only used for description purposes, do not particularly refer to an order or sequence, and do not limit the present invention, but only distinguish components or operations described in the same technical terms, and are not understood to indicate or imply relative importance or implicitly indicate the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.

As shown in fig. 1 to 11, the novel multifunctional wheelchair of the present embodiment comprises: the seat device is arranged on the top surface of the mobile device; the seat device comprises an electric adjustable backrest 1, a movable armrest 2, a seat frame 3, an electric adjusting device 4 and a movable leg support 5, and the moving device comprises a front wheel 6, a driving wheel 7, a damping spring 8, a rear wheel 9 and a driving device 10.

The adjustable backrest 1 is connected with a parallel double-crank mechanism 14 for adjusting the angle of the backrest, and a rear wheel 9 is mounted on the adjustable backrest, so that auxiliary support can be provided when the backrest is in a completely flattened state, and the stability is improved; the adjustable backrest 1 is hinged with the chair frame 3, the movable armrest 2 is respectively hinged with the adjustable backrest 1 and the chair frame 3 through a pair of parallel double-crank mechanisms 15, and the chair frame 3 is hinged with the movable leg support 5.

The front wheel 6 is arranged at the front end of the chair frame 3, the driving device is arranged in the chair frame 3, the driving wheel 7 is connected with the driving device 10 through a transmission shaft and is arranged at two sides of the chair frame 3, and the rear side of the chair frame 3 is hinged with two damping springs 8.

As shown in fig. 2, the electric adjustable backrest 1 can realize the free switching from the vertical ground state to the completely flat state. The motor 13 is connected with one end of the worm 12, the worm 12 is matched with the worm wheel 11, the worm wheel 11 is fixedly connected with the crank 18, the other end of the crank 18 is hinged with the connecting rod 19, the other end of the connecting rod 19 is hinged with the back rest rod 20, according to the self-locking principle of the worm wheel and the worm, a parallel double-crank mechanism (shown in figures 6, 7 and 8) optimally designed by an analytic method is connected with the worm wheel 11 and the worm 12 in series, and the automatic adjustment of the angle of the back rest 1 within the range of 90-180 degrees can be realized by controlling the forward and reverse rotation of the motor 13.

As shown in fig. 6, the movable handrail 2 is mounted on a connecting rod of the parallel double-crank mechanism 15, and the electric adjusting device 4 is mounted on the movable handrail 2.

As shown in figure 5, the angle of the movable leg support 5 can be adjusted by mounting the pull rod 17 on the hook plate 16 of the movable leg support 5 through the hook plate 16 mounted on the chair frame 3, and the adjustable angle range is 90-180 degrees.

As shown in fig. 10, the driving wheel 7 is a pair of three-planetary-wheel mechanisms, and the movement principle is as follows: the switching between the stair climbing function and the bottom walking function can be realized by controlling the planet carrier; walking on the flat ground: the second motor is not operated when the power is cut off, the first motor transfers power to the central shaft after being decelerated by the speed reducer, then the power is transferred to the transition gear and the transmission gear, and finally the three star wheels rotate simultaneously through the fixing shaft. At the moment, the output power of the motor for controlling the rotating speed of the wheelchair is the same, the rotating direction and the rotating speed of each star wheel are the same, the planet wheels at the upper ends of the star wheels are in an idling state, and two pairs of wheels in contact with the ground are in charge of driving; turning time: when the steering is required, a rotation speed difference is formed by controlling the rotation speeds of the pair of motors, and at the moment, the speed of the external motor is higher than that of the internal motor, or the steering of the control motors is opposite, so that the steering can be realized; climbing stairs at all times: the first motor is powered off and stopped, the second motor transmits driving force to the outer ring shaft and the planet carrier after passing through the speed reducer, and the planet carrier is driven to roll at the moment. At the moment, the motor steering and the rotating speed of the two sides which are responsible for controlling the planet wheel carrier are the same, and at the moment, the three planet wheels are not rotated and are only fixed on the planet carrier.

The working principle of the novel multifunctional wheelchair is as follows:

when a user sits on the wheelchair, the electric adjusting device 4 on the movable armrest 2 is opened, the model of the electric adjusting device 4 is USP425-1U2, the motor 13 is started at the moment, the backrest angle is slowly adjusted through the transmission of the worm wheel 11 and the worm 12 mechanism, when the user finds the most comfortable sitting posture, the electric adjusting device 4 is closed, the motor 13 stops rotating at the moment, and the backrest angle is instantly locked through the self-locking principle of the worm wheel 11 and the worm 12. When the angle of the backrest changes, the movable armrests 2 are mounted on the links of the parallelogram mechanism, so that the armrests move together with the backrest, and the arms of the user are always placed on the armrests in the most comfortable state.

When the backrest of the wheelchair is placed at ordinary times, the wheelchair becomes a movable simple bed, and the old or the disabled can conveniently lie down to have a rest. In addition, the angle of the movable leg support 5 can be freely adjusted, firstly, the pull rod 17 is placed on the hook plate 16 through adjusting the hook plate 16, the angle adjustment can be realized, the leg support of the scheme can realize the angle adjustment of 30 degrees, 60 degrees and 90 degrees, and a user can freely adjust according to own conditions.

The above description is only an embodiment of the present invention, and is not intended to limit the present invention. Various modifications and alterations to this invention will become apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.