CN214549877U

CN214549877U - Seat horizontal posture self-holding wheelchair based on large inertia wheel

Info

Publication number: CN214549877U
Application number: CN202120361251.8U
Authority: CN
Inventors: 丁哲文; 王廷军; 毛宇菲; 邹旭; 侯旭杰; 薛慧
Original assignee: Shanghai Dianji University
Current assignee: Shanghai Dianji University
Priority date: 2021-02-07
Filing date: 2021-02-07
Publication date: 2021-11-02
Anticipated expiration: 2031-02-07

Abstract

The utility model provides a self-holding wheelchair for the horizontal posture of a seat based on a large inertia wheel, which comprises a wheelchair frame, a seat plate, a chair back, a large inertia wheel self-holding mechanism for the seat posture and two wheels of the wheelchair; the middle part of the seat board can be pivoted on the wheelchair frame through a connecting rod in a way of rotating around the connecting rod; the bottom of the chair back is fixedly connected with the seat board; the wheelchair wheels are pivotally connected to the wheelchair frame; the high inertia wheel seat attitude self-holding mechanism is connected between the seat plate, one of the wheelchair wheels and the wheelchair frame. The utility model discloses a horizontal gesture self-sustaining wheelchair of seat based on big inertia wheel realizes the inclination of wheelchair user at upslope, downhill path in-process automatic adjustment seat, keeps the seat to be in the horizontal gesture always, improves security and the travelling comfort that the wheelchair used.

Description

Seat horizontal posture self-holding wheelchair based on large inertia wheel

Technical Field

The utility model relates to a wheelchair safety device field especially relates to a seat horizontal attitude self-sustaining wheelchair based on large inertia wheel.

Background

The wheelchair on the current market only can ensure that the wheelchair does not tilt in the process of ascending and descending, and the wheelchair user can slide downwards in the process of ascending and descending through the form of the safety belt. This form presents a significant safety hazard and greatly reduces comfort for the wheelchair user. Some wheelchairs capable of realizing similar functions realize the level of the wheelchair by adjusting the height of a front wheel of the wheelchair.

The prior art has great inconvenience in realizing seat balance.

1. The posture adjusting time period is too long, and the seat posture cannot be adjusted in time when the wheelchair encounters a long slope or a steep slope, so that the feeling of a user is influenced, and potential safety hazards exist;

2. adjusting a process design sensing device, a control device and a motor, and needing maintenance;

3. the prior device needs to be additionally provided with an additional power supply to realize the function, has small application range and energy consumption, and causes inconvenience to wheelchair users.

The large inertia wheel is successfully applied to the field of aerospace at present, and has the characteristics of simple structure, low cost and stability. Most of common applications of large inertia wheels in daily life are focused on the aspects of bicycles, wristballs and the like, and the large inertia wheels have a lot of application blank areas in daily life and have huge development potential. Particularly, in the aspect of wheelchairs, the characteristics of the wheelchair have high conformity with the safety and stability required by the wheelchair, and the wheelchair has great research value.

Disclosure of Invention

To the not enough among the above-mentioned prior art, the utility model provides a horizontal gesture self-sustaining wheelchair in seat based on big inertia wheel realizes that the wheelchair user keeps the health level at upslope, downhill path in-process, improves security and the travelling comfort that the wheelchair used.

In order to achieve the aim, the utility model provides a self-holding wheelchair for the horizontal posture of a seat based on a large inertia wheel, which comprises a wheelchair frame, a seat plate, a chair back, a large inertia wheel self-holding mechanism for the seat posture and two wheelchair wheels; the middle part of the seat board can be pivoted on the wheelchair frame through a connecting rod in a way of rotating around the connecting rod; the bottom of the chair back is fixedly connected with the seat board; the wheelchair wheels are pivotally connected to the wheelchair frame; the high inertia wheel seat attitude self-holding mechanism is connected between the seat plate, one of the wheelchair wheels and the wheelchair frame.

Preferably, the wheelchair further comprises a front limit lever and a rear limit lever connected to the wheelchair frame; the front limiting rod is arranged below the front part of the seat plate and limits the seat plate; the rear limiting rod is arranged below the rear part of the seat plate and limits the seat plate.

Preferably, the large inertia wheel seat posture state self-maintaining mechanism comprises a flywheel device, a bevel gear, a transmission shaft, a concentric shaft, a belt and two fixing plates; the flywheel device comprises a shell, a flywheel and a ratchet wheel, wherein the flywheel and the ratchet wheel are arranged in the shell, and the bevel gear is in transmission connection with the flywheel through the ratchet wheel; the fixing plates are fixed on the wheelchair frame and positioned on two sides below the seat plate; two ends of the transmission shaft are respectively pivoted between the two fixing plates through a bearing; the bevel gear is arranged in the middle of the transmission shaft and meshed with the bevel gear; one end of the concentric shaft is connected with the center of a wheelchair wheel, and the other end of the concentric shaft is pivoted with the wheelchair frame; the concentric shaft is in transmission connection with the transmission shaft through the belt.

The utility model discloses owing to adopted above technical scheme, make it have following beneficial effect:

by adopting the flywheel device, the horizontal stability of the wheelchair seat is realized by utilizing the mechanical principle of a large inertia wheel. The wheelchair has the advantages of simple and stable structure, high safety, low cost and energy conservation, solves the safety problem caused by the seat inclination in the up-down slope process of the wheelchair on the market at present, and simultaneously is provided with the ratchet wheel to prevent the condition that the flywheel is not driven by the flywheel due to the rotation speed of the wheel of the wheelchair, thereby further ensuring the safety.

Drawings

Fig. 1 is a top view of a high inertia wheel based seat horizontal attitude self-sustaining wheelchair according to an embodiment of the present invention;

fig. 2 is a perspective view of a first direction of a high inertia wheel based seat horizontal posture self-sustaining wheelchair in accordance with an embodiment of the present invention;

fig. 3 is a perspective view of a second direction of the high inertia wheel based seat horizontal posture self-sustaining wheelchair of the embodiment of the present invention.

Detailed Description

The following description of the preferred embodiments of the present invention will be given with reference to the accompanying drawings 1 to 3, and will make the functions and features of the present invention better understood.

Referring to fig. 1 to 3, a large inertia wheel-based seat horizontal posture self-retaining wheelchair according to an embodiment of the present invention includes a wheelchair frame 1, a seat plate 2, a seat back 3, a large inertia wheel seat posture self-retaining mechanism 4, and two-wheeled wheelchair wheels 5; the middle part of the seat board 2 can be pivoted on the wheelchair frame 1 through a connecting rod 6 around a connecting rod 6 in a rotating way; the bottom of the chair back 3 is fixedly connected with the seat board 2; the wheelchair wheel 5 is pivoted on the wheelchair frame 1; the high inertia wheel seat posture self-holding mechanism 4 is connected between the seat plate 2, a wheelchair wheel 5 and the wheelchair frame 1.

Also comprises a front limit rod 7 and a rear limit rod 8 which are connected with the wheelchair frame 1; the front limiting rod 7 is arranged below the front part of the seat plate 2 and limits the seat plate 2; the rear limiting rod 8 is arranged below the rear part of the seat plate 2 and limits the seat plate 2. The front limiting rod 7 and the rear limiting rod 8 prevent the seat board 2 from being turned over by too large angle to cause potential safety hazards.

The large inertia wheel seat posture self-holding mechanism 4 comprises a flywheel device 41, a bevel gear 42, a bevel gear 43, a transmission shaft 44, a concentric shaft 45, a belt 46 and two fixing plates 47; the flywheel device 41 comprises a shell, a flywheel and a ratchet wheel, wherein the flywheel and the ratchet wheel are arranged in the shell, and the bevel gear 42 is in transmission connection with the flywheel through the ratchet wheel; the fixing plates 47 are fixed on the wheelchair frame 1 and positioned at two sides below the seat plate 2; the two ends of the transmission shaft 44 are respectively pivoted between the two fixing plates 47 through a bearing 48; the bevel gear 43 is arranged in the middle of the transmission shaft 44 and meshed with the bevel gear 42; one end of the concentric shaft 45 is connected with the center of a wheelchair wheel 5, and the other end of the concentric shaft 45 is pivoted with the wheelchair frame 1; the concentric shaft 45 is in driving connection with the drive shaft 44 via a belt 46.

The casing of the flywheel device 41 is connected below the seat plate 2 by welding, so that the stable balance of the seat plate 2 can be realized. The concentric shaft 45 rotates in synchronism with an associated wheelchair wheel 5.

When the wheelchair is moving forward, the wheelchair wheels 5 rotate, and the moving kinetic energy is converted into the kinetic energy of the rotation of the concentric shaft 45 through the concentric shaft 45.

The concentric shaft 45 rotates, and the rotating shaft is driven to rotate through the belt 46.

The bevel gear 43 on the transmission shaft 44 rotates, and the bevel gear 42 rotates through meshing transmission.

The bevel gear 42 is connected with the flywheel through a ratchet wheel, and the ratchet wheel drives the flywheel to rotate, so that stable balance of the seat is realized.

Due to the ratchet wheel characteristic, only one-way transmission is available, and when the wheelchair stops moving, the rotation of the flywheel does not rotate the connected bevel gear 42. The wheelchair is not influenced, the condition that the flywheel is not driven by the flywheel when the rotating speed of the wheel 5 of the wheelchair drives the flywheel is avoided, and the safety of the device is further improved. At the same time, the seat plate 2 can be balanced when the wheelchair is in a stopped state.

The problem of current wheelchair gesture adjustment time period overlength, the utility model discloses a big inertia wheel technique, along with the gos forward of wheelchair, through belt 46 driven mode, guarantee the level of wheelchair seat constantly at the in-process that the wheelchair marchd. The posture adjustment process does not exist, and the safety of the wheelchair and the comfort of the wheelchair user are improved.

The current device needs the periodic maintenance problem, the utility model discloses a device comprises pure mechanical structure, does not add electric system, and life improves greatly, has ensured the stability in the use simultaneously, has avoided improving the life of wheelchair, improvement security because the unexpected condition that electrical fault caused.

The utility model discloses a horizontal gesture self-sustaining wheelchair of seat based on big inertia wheel does not need extra power, through the transport mechanism of belt 46, gear, with the kinetic energy transmission that the wheelchair gos forward the production to the flywheel mechanism on, make the flywheel operation, realize that the seat gesture is stable.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A self-holding wheelchair based on a large-inertia wheel and with a horizontal seat posture is characterized by comprising a wheelchair frame, a seat plate, a chair back, a large-inertia wheel and self-holding mechanism of the seat posture and two wheelchair wheels; the middle part of the seat board can be pivoted on the wheelchair frame through a connecting rod in a way of rotating around the connecting rod; the bottom of the chair back is fixedly connected with the seat board; the wheelchair wheels are pivotally connected to the wheelchair frame; the high inertia wheel seat attitude self-holding mechanism is connected between the seat plate, one of the wheelchair wheels and the wheelchair frame.

2. The high inertia wheel-based, seat-level, attitude, self-sustaining wheelchair of claim 1, further comprising a front and a rear restraining bar connected to the wheelchair frame; the front limiting rod is arranged below the front part of the seat plate and limits the seat plate; the rear limiting rod is arranged below the rear part of the seat plate and limits the seat plate.

3. The high inertia wheel-based seat posture self-sustaining wheelchair of claim 2, wherein the high inertia wheel-based seat posture self-sustaining mechanism comprises a flywheel gear, a bevel gear, a transmission shaft, a concentric shaft, a belt and two fixing plates; the flywheel device comprises a shell, a flywheel and a ratchet wheel, wherein the flywheel and the ratchet wheel are arranged in the shell, and the bevel gear is in transmission connection with the flywheel through the ratchet wheel; the fixing plates are fixed on the wheelchair frame and positioned on two sides below the seat plate; two ends of the transmission shaft are respectively pivoted between the two fixing plates through a bearing; the bevel gear is arranged in the middle of the transmission shaft and meshed with the bevel gear; one end of the concentric shaft is connected with the center of a wheelchair wheel, and the other end of the concentric shaft is pivoted with the wheelchair frame; the concentric shaft is in transmission connection with the transmission shaft through the belt.