CN112263445A

CN112263445A - Semi-automatic machinery prevents falling and helps capable car

Info

Publication number: CN112263445A
Application number: CN202011236399.5A
Authority: CN
Inventors: 李双喜; 程光; 周文必; 李金波; 何玮琪; 樊佳佳; 王艺琳
Original assignee: Beijing University of Chemical Technology
Current assignee: Beijing University of Chemical Technology
Priority date: 2020-11-09
Filing date: 2020-11-09
Publication date: 2021-01-26

Abstract

The invention provides a semi-automatic anti-falling rollator. The emergency braking device comprises a support, a brake wheel assembly and an emergency braking device. The brake wheel assembly is connected with the front support rod of the support through a bottom plate at the upper part of the brake wheel, the emergency braking device is connected to the rear support rod of the support through a spring pin, and the height of the emergency braking device is adjustable. When the user is about to fall, the user and the support accelerate forward. The pendulum structure in the emergency braking device is sequentially provided with a lifting lug, a locking plate and a heavy hammer from top to bottom, wherein the heavy hammer has relatively large mass, the original motion state is kept unchanged in a short time due to inertia, and the opposite device is thrown upwards to drive the locking plate to clamp the ratchet wheel, so that a wheel connected with the ratchet wheel is further locked. The user steps on the brake wheel again, makes the front wheel locking, can realize that the device is whole to become the slip by rolling, increases frictional force, provides enough support. The invention has simple structure, and converts the motion of a person in a falling critical state into the relative motion of the pendulum bob and the ratchet wheel, thereby realizing the falling prevention.

Description

Semi-automatic machinery prevents falling and helps capable car

Technical Field

The invention relates to the field of machinery, in particular to a semi-automatic mechanical anti-falling walking aid vehicle which is particularly suitable for being used by people with inconvenient legs and feet such as old people.

Background

The prior anti-falling mechanical device in the market is mainly based on a walking aid device to provide a supporting point for a user. Under the critical falling state, the support or the handrail which can be held is provided for the user, the forward tilting acting force generated by the falling of the user is reduced by utilizing the stable structure of the support, and enough buffering time is provided for the user, so that the walking posture is adjusted, and the falling is prevented.

Comparatively ripe prevent falling the flip-chip and be fully to ensure user's safety in the market, the support all avoids adopting the wheel with ground to increase frictional force can provide sufficient support counter-force for the old man under the critical condition that the user falls, thereby ensures that the user can not fall.

In practical use, the user generally needs to lift the whole device or directly push the device to slide on the ground. Because the person who needs to help the device of walking generally is harder to move, so both modes are harder to operate for the actual user, and the structure needs to be optimized.

At present, a novel walking aid with wheels is available on the market, but the novel walking aid is braked by adopting a brake. The old man reaction when falling down is slower, and the friction between wheel and the ground is less, and it is very likely that the old man has not arrived to carry out brake yet, just has caused the car turnover to cause the injury, there is great potential safety hazard.

Therefore, there is a need for a device that can automatically prevent falling, providing sufficient reaction time for the elderly, thereby avoiding injury.

Disclosure of Invention

To address the deficiencies of the prior art, it is an object of the present invention to provide a semi-automatic mechanical crash-proof rollator.

According to the invention, a semi-automatic mechanical anti-falling rollator comprises a bracket 1, a brake wheel assembly 3 and an emergency brake device 5. Four supporting points at the lower part of the bracket.

The brake wheel assembly is connected with a support front support rod through a brake wheel upper bottom plate, and the emergency braking device comprises an inverted T-shaped support 206, two wheels 201, two ratchet wheels 205, a connecting shaft 202, a pendulum 209, a fixed washer 207 and the like.

Preferably, the ratchet wheel 205 is fixed on the wheel 201 by a tightening screw 208, and is fixed at both ends of the connecting shaft 202 together with the wheel 201. The connecting shaft 202 of the wheel 201 and the ratchet wheel 205 fixed at two ends passes through the inverted T-shaped bracket 206 and then connects the emergency braking device with the bracket rear supporting rod 4 through the elastic pin.

Preferably, the pendulum 209 is formed by welding three parts, namely a lifting lug 301, a locking piece 302 and a lower weight 303. The weight has high density and the hanging ring has low density, and the locking plate is made of magnetic material and has width capable of matching with the left ratchet wheel and the right ratchet wheel. The pendulum 209 passes through the connecting shaft 202, is positioned at the middle shaft section of the connecting shaft under the action of the fixing washer 207, can rotate freely around the connecting shaft, and is limited in horizontal movement.

Preferably, the connecting shaft 202 is a symmetrical structure, and the overall structure is divided into a middle shaft section, a shaft shoulder, a wheel section and a thread section. The upper part of the section of the middle shaft section is an elliptical arc, and the lower part of the section of the middle shaft section is an arc. The shaft shoulders are symmetrically distributed at the two ends of the middle shaft section, so that the pendulum bob 209 can be conveniently positioned.

Preferably, the inverted T-shaped bracket 206 connected with the bracket rear supporting rod 4 through elastic pins is slotted at the bottom, and square holes are formed at T-shaped nodes. The pendulum 209 passes through the inverted T-shaped bracket 206, is hung on the connecting shaft 202 through a lifting lug, and is led out from the square hole.

Preferably, the shaft section passing through the inverted T-shaped bracket 206 forms an interference fit with the inner hole of the fixing washer 207 through a protruding shaft shoulder, and the outer hole of the fixing washer 207 forms a clearance fit with the inner hole of the short pipe of the inverted T-shaped bracket 206, so as to position the axis of the connecting shaft 202 at the axis of the short pipe of the inverted T-shaped bracket 206.

Preferably, the brake wheel is a universal brake wheel, the pedal is treaded by feet, and braking and steering locking are realized simultaneously.

Preferably, the bracket material is selected from aluminum alloy.

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

1. the invention adopts a pure mechanical structure, does not need energy source drive and can be continuously used.

2. According to the invention, the emergency braking device is utilized, and inertia is utilized, so that when a user falls down, the pendulum bob is thrown upwards to drive the locking plate to clamp the ratchet wheel, and the locking of the device is realized, thereby realizing the locking of the wheel. The emergency braking device has simple structure and quick response, and effectively improves the safety.

Drawings

FIG. 1 is a schematic view of the structure of the present invention

FIG. 2 is a schematic view of an emergency brake apparatus according to the present invention

FIG. 3 is a schematic view of the normal state structure of the emergency braking device of the present invention

FIG. 4 is a sectional view showing the working state of the emergency braking device according to the present invention

FIG. 5 is a schematic view of the pendulum structure of the emergency braking device of the present invention

FIG. 6 is a left side view of the eccentric structure of the pendulum of the emergency braking device of the present invention

FIG. 7 is a front view of the connection shaft of the emergency braking device of the present invention

In the figure: 1 bracket, 2 front supporting rods, 3 brake wheel assemblies, 4 rear supporting rods, 5 emergency braking devices, 201 wheels, 202 connecting shafts, 203 fixing nuts, 204 gaskets, 205 ratchets, 206 inverted T-shaped brackets, 207 fixing washers, 208 tight screws, 209 pendulum bob, 301 lifting lugs, 302 locking plates and 303 pendulum bob

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.

As shown in figures 1-7, the present invention provides a novel rollator: the utility model provides a semi-automatic machine prevents falling helps capable car, includes

support

1, and 1 bottom of support has four strong points, and two preceding strong points are connected with bracing piece 2 before the support through brake wheel upper portion bottom plate, and emergency braking device 5 is fixed on back bracing piece 4 through the bullet round pin, and height-adjustable. The brake wheel is a universal wheel and is braked by stepping on. The emergency brake device 5 comprises a pendulum 209, a ratchet wheel 205, wheels 201, a connecting shaft 202 and the like. The ratchet wheel 205 is fixed on the wheel 202 through a tight screw 208, the connecting shaft 202 penetrates through the inverted T-shaped support 206 to fix the wheel 201 and the ratchet wheel 205 at two ends of the inverted T-shaped support 206 through threaded connection, the pendulum 209 penetrates through the connecting shaft 202 and is arranged at the shaft section of the connecting shaft 202, under the action of gravity, the upper edge of the inner hole of the lifting lug of the pendulum 209 is tightly attached to the upper edge of the middle shaft section of the connecting shaft 202 to form an eccentric structure, and fixing washers 207 distributed on the left and right of the pendulum fix the shaft 202 at the shaft center of the short pipe of the inverted T-shaped support 206 and limit the horizontal movement of the pendulum.

The method comprises the following operation steps:

when the walking aid vehicle normally walks, the walking aid vehicle is pushed to walk forwards by the aid of the support, and the brake wheels are in a normal working state, so that the steering in any direction can be realized. The emergency brake device is in a normal working state, the pendulum bob 209 is vertically suspended, the bending direction of the lock piece is consistent with the advancing direction, and the lock piece is lower than the tangent edge of the lower part of the ratchet wheel 205 and does not interfere with the ratchet wheel 205.

When falling, the user leans forward due to inertia, the walking aid vehicle integrally generates forward acceleration, and the emergency braking device is switched from a normal working state to a braking state. The weight structure in the pendulum 209 is thrown upwards due to inertia and large mass, the bent part of the lock plate is higher than the tangent edge of the lower part of the ratchet wheel 205, the interference is generated with the range contained by the outer diameter of the ratchet wheel 205, the ratchet wheel 205 is clamped, and then the wheel 201 connected with the ratchet wheel 205 is locked, so that the locking of the rear wheel of the rollator is realized, and the buffering time is provided for users. After the emergency braking device 5 plays a role, a user treads the front brake wheel by feet to realize the braking and steering locking of the front wheel, so that the whole device is locked, the whole device is changed from rolling to sliding, enough support is provided for the user, and the anti-falling function is realized.

The above-mentioned embodiments are further described in detail for the purpose of illustrating the invention, and it should be understood that all modifications, equivalents, improvements and the like made within the spirit and principle of the invention are included in the scope of the invention.

Claims

1. A semi-automatic mechanical anti-falling rollator is characterized by comprising a bracket 1, a brake wheel assembly 3 and an emergency brake device 5. The lower part of the bracket is provided with four supporting points, and the emergency braking device 5 is arranged on the rear supporting rod 4 through elastic pins and has adjustable height.

2. The emergency braking device according to claim 1, wherein the ratchet wheel 205 is fixedly connected to the wheel 201 by a tightening screw 208 uniformly distributed, two ratchet wheels 205 and two wheels 201 are symmetrically arranged at two ends of the connecting shaft 202, and the shaft end is screwed with the washer 204 by a fixing nut 203.

3. The emergency brake of claim 1, wherein the coupling shaft 202 has a symmetrical structure, and the overall structure is divided into a middle shaft section, a shoulder, a wheel section, and a threaded section. The upper part of the section of the middle shaft section is an elliptical arc, and the lower part of the section of the middle shaft section is an arc. The shaft shoulders are symmetrically distributed at two ends of the middle shaft section.

4. The emergency braking device of claim 1, wherein the connecting shaft 202 passes through the short tube of the inverted T-shaped bracket 206, two shoulders at the middle part of the connecting shaft 202 form an interference fit with the inner hole of the fixing washer 207, the outer hole of the fixing washer 207 forms a clearance fit with the inner hole of the short tube of the inverted T-shaped bracket 206, and the connecting shaft 202 forms a tight connection with the inverted T-shaped bracket 206 after the assembly is completed.

5. The emergency braking device of claim 1, wherein the pendulum 209 is formed by welding three parts, namely a lifting lug 301, a locking plate 302 and a lower weight 303. The weight has high density and the hanging ring has low density, and the locking plate is made of magnetic material and has width capable of matching with the left ratchet wheel and the right ratchet wheel.

6. The semi-automatic mechanical crash-resistant rollator of claim 1 wherein the inverted T-shaped bracket 206, which is connected to the bracket rear strut 4 by means of a spring pin, opens a square hole at the T-shaped node. The pendulum 209 is hung at the middle shaft section of the connecting shaft 202 and led out from a square hole of a T-shaped node of the inverted T-shaped bracket 206. Under the normal operating condition, pendulum 209 is in vertical state under the action of gravity, and pendulum 209 rings hole upper edge hugs closely the connecting axle 202 middle shaft section, and the locking plate direction of bending is unanimous with user's direction of advance, and the locking plate peak is less than ratchet lower part tangent line edge, can not take place to interfere with ratchet 205.