CN216091112U

CN216091112U - Electric folding wheelchair

Info

Publication number: CN216091112U
Application number: CN202122093427.9U
Authority: CN
Inventors: 赵明岩; 金晨阳
Original assignee: China Jiliang University
Current assignee: China Jiliang University
Priority date: 2021-09-01
Filing date: 2021-09-01
Publication date: 2022-03-22
Anticipated expiration: 2031-09-01

Abstract

The utility model discloses an electric folding wheelchair, which comprises a chassis, wheels, a stool surface and a lifting mechanism, wherein the lifting mechanism is arranged on the chassis, and the upper part of the lifting mechanism is connected to the stool surface and is used for driving the stool surface to lift; the lifting mechanism comprises a sliding block connecting rod mechanism and a supporting rod mechanism, the sliding block connecting rod mechanism comprises a crank, a sliding block connecting rod and a sliding block, one end of the crank is hinged to the base plate, the other end of the crank is connected to the middle of the sliding block connecting rod, one end of the sliding block connecting rod is connected to the sliding block, the other end of the sliding block connecting rod is hinged to the stool surface, and the sliding block is matched with a sliding block rail on the base plate; the support rod mechanism comprises a first support rod and a second support rod which are mutually connected. The utility model has stable structure and is convenient to store so as to save space.

Description

Electric folding wheelchair

Technical Field

The utility model relates to the technical field of wheelchairs, in particular to an electric folding wheelchair.

Background

With the increasing aging, more and more old people need to go out by means of wheelchairs. However, due to the rapid increase of labor cost, the shortage of nursing staff in home (hospital, community, etc.) is serious, and an electric folding wheelchair is urgently needed to replace nursing staff and realize the function of carrying the old (and the disabled, the sick, etc.).

At present, electric wheelchairs have a plurality of styles, but have the following defects: firstly, the folding cannot be performed, and the space occupation is large in a non-working state; second, current folding electronic wheelchair, when operating condition, the structure is unstable (mainly adopts parallelogram mechanism at present, can't form stable dead point structure), has certain potential safety hazard, and intelligent degree is lower. In order to increase safety and stability, the wheelchair can only thicken and widen two connecting rods for bearing the weight of the seat in a parallelogram structure, so that the structure is heavy.

SUMMERY OF THE UTILITY MODEL

In view of the above, the present invention provides an electric folding wheelchair with a stable structure and a space saving function, so as to solve the technical problems in the prior art.

The utility model provides the following electric folding wheelchair, which comprises a chassis, wheels, a stool surface and a lifting mechanism, wherein the wheels are arranged on the chassis and are used for supporting and driving the chassis to move;

the lifting mechanism comprises a sliding block connecting rod mechanism and a supporting rod mechanism, the sliding block connecting rod mechanism comprises a crank, a sliding block connecting rod and a sliding block, one end of the crank is hinged to the base plate, the other end of the crank is connected to the middle of the sliding block connecting rod, one end of the sliding block connecting rod is connected to the sliding block, the other end of the sliding block connecting rod is hinged to the stool surface, and the sliding block is matched with a sliding block rail on the base plate; the supporting rod mechanism comprises a first supporting rod and a second supporting rod which are mutually connected, one end of the first supporting rod is hinged to the sliding block, the other end of the first supporting rod is hinged to the second supporting rod, and the other end of the second supporting rod is hinged to the stool surface.

Optionally, the telescopic rod with multiple degrees of freedom further comprises a telescopic rod with multiple sections which are sleeved, wherein the telescopic rod at the bottom is hinged in the middle of the sliding block connecting rod, and the telescopic rod at the front part is used for driving the folding and unfolding of the backrest and the handrail.

Optionally, the folding stool further comprises a backrest and two side armrests, the two side armrests are hinged to the backrest respectively, the two side armrests are hinged to the stool surface through armrest connecting rods respectively, so that the backrest, the one side armrests, the armrest connecting rods and the stool surface form a parallelogram, and the front telescopic rod is hinged to a common hinged end of one side armrest and the backrest.

Optionally, a stool surface slide rail is arranged on the side surface of the stool surface, a telescopic rod slide block is arranged in the stool surface slide rail, a slide block pin is arranged on the telescopic rod slide block, and the multi-degree-of-freedom telescopic rod is provided with a slide rail groove for the slide block pin to be placed in and slide.

Optionally, a containing groove is formed in the slider connecting rod, and the first supporting rod and the second supporting rod are folded to hide the containing groove to the slider connecting rod.

Optionally, a telescopic groove is formed in the stool surface, the multi-degree-of-freedom telescopic rod penetrates through the telescopic groove and is supported at a common hinged end of the armrest and the backrest, and when the wheelchair is completely folded, the multi-degree-of-freedom telescopic rod is contracted and rotated in the telescopic groove.

Optionally, a folding groove is formed in the stool surface at the inner side of the armrest, and when the electric folding wheelchair is in a folded state, the slider connecting rod is hidden in a space formed by the folding groove and the slider rail.

Optionally, the sliding block is connected with a right-angle push rod, and the sliding block moves to the right to drive the right-angle push rod to move to the right to touch the pedal positioned in front and rotate to be perpendicular to the ground.

Compared with the prior art, the structure of the utility model has the following advantages: when the stool surface rises to the highest point, the first support rod and the second support rod are stretched into a straight line to form a self-locking structure, so that the stool surface is ensured to be firm in structure and cannot fall; the slide block connecting rod hinge is positioned at the middle point of the slide block connecting rod, and the length of the crank is half of that of the slide block connecting rod, so that when the slide block moves left and right, the backrest hinge and the crank hinge are always on the same straight line (the straight line vertical to the ground), and the stool surface is ensured not to move left and right when descending (or ascending). The utility model has stable structure and is convenient to store so as to save space.

Drawings

FIG. 1 is a schematic view of the overall structure of an electric folding wheelchair;

FIG. 2 is a schematic view of a stool surface;

FIG. 3 is a schematic structural view of a multi-degree of freedom telescopic rod;

FIG. 4 is a perspective view of the electric folding wheelchair;

FIG. 5 is a schematic side view of the present invention;

FIG. 6 is a schematic view of the present invention in a folded state;

FIG. 7 is a schematic view of the present invention in an expanded state.

Detailed Description

Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, but the present invention is not limited to only these embodiments. The utility model is intended to cover alternatives, modifications, equivalents and alternatives which may be included within the spirit and scope of the utility model.

In the following description of the preferred embodiments of the present invention, specific details are set forth in order to provide a thorough understanding of the present invention, and it will be apparent to those skilled in the art that the present invention may be practiced without these specific details.

The utility model is described in more detail in the following paragraphs by way of example with reference to the accompanying drawings. It should be noted that the drawings are in simplified form and are not to precise scale, which is only used for convenience and clarity to assist in describing the embodiments of the present invention.

As shown in fig. 1, the electric folding wheelchair of the present invention is schematically illustrated, and comprises a chassis 7, wheels 4, a stool surface 10 and a lifting mechanism, wherein the wheels 4 are mounted on the chassis 7 and are used for supporting and driving the chassis 7 to move, the stool surface 10 is located above the chassis 7, the lifting mechanism is mounted on the chassis 7, and the upper part of the lifting mechanism is connected to the stool surface 10 and is used for driving the stool surface 10 to lift;

the lifting mechanism comprises a slider connecting rod mechanism and a support rod mechanism, the slider connecting rod mechanism comprises a crank 3, a slider connecting rod 5 and a slider 15, one end of the crank 3 is hinged to the chassis 7, the other end of the crank is connected to the middle of the slider connecting rod 5, one end of the slider connecting rod 5 is connected to the slider 15, the other end of the slider connecting rod 5 is hinged to the stool surface 10, and the slider 15 is matched with a slider rail 13 on the chassis 7; the supporting rod mechanism comprises a first supporting rod 6-1 and a second supporting rod 6-2 which are mutually connected, one end of the first supporting rod 6-1 is hinged on the sliding block 15, the other end of the first supporting rod is hinged with the second supporting rod 6-2, and the other end of the second supporting rod 6-2 is hinged on the stool surface 10.

The utility model has the advantages that the basic solution and the implementation mode are provided, and other improvements and technical features are provided on the basis of the basic solution and the implementation mode, and the corresponding technical effects are achieved.

Under the push of an electric push rod of a power device (for simplicity of view, not shown in the figures, but known by a person skilled in the art according to the teaching of the specification how to implement the power device), the slide block 15 moves rightwards, the first support rod 6-1 and the second support rod 6-2 begin to fold, the stool surface 10 begins to descend, the slide block connecting rod hinge 5-1 is located at the middle point of the slide block connecting rod 5, and the length of the crank 3 is half of that of the slide block connecting rod 5, so that when the slide block 15 moves rightwards, the backrest hinge 1-1 and the crank hinge 3-1 are always on a straight line (a straight line perpendicular to the ground), and the stool surface 10 is ensured not to move leftwards and rightwards when descending (or ascending). When the slide block 15 moves to the leftmost side (a self-locking mechanism is formed here), the stool surface 10 reaches the highest point, and at the moment, the first support rod 6-1 and the second support rod 6-2 are stretched into a straight line to form a special structure in mechanical design: the dead point position, namely the self-locking structure, ensures that the stool surface 10 has a firm structure and cannot descend.

As can be seen in fig. 1, the utility model further comprises a multi-degree-of-freedom telescopic rod 2, wherein the multi-degree-of-freedom telescopic rod 2 comprises a plurality of telescopic rods which are sleeved in a multi-section mode, the telescopic rod at the bottom is hinged in the middle of the sliding block connecting rod, and the telescopic rod at the front is used for driving the folding and unfolding of the chair backrest 1 and the armrest 12.

As shown in fig. 2, the structure of the side surface of the stool surface is illustrated, a stool surface slide rail 10-1 is arranged on the side surface of the stool surface 10, a telescopic rod slide block 14-4 is arranged in the stool surface slide rail 10-1, a slide block pin 14-4-1 is arranged on the telescopic rod slide block 14-4, and the multi-degree-of-freedom telescopic rod 2 is provided with a slide rail groove for the slide block pin 14-4-1 to be inserted and slide.

As shown in FIG. 3, the specific structure of the multi-degree-of-freedom telescopic rod is illustrated. The telescopic rod 2 with multiple degrees of freedom is provided with a telescopic rod slide block 14-4, when the bench surface 10 ascends (or descends), the telescopic rod slide block 14-4 extends (or contracts) while moving along the bench surface side groove 10-1, thereby driving the backrest 1 and the armrests 12 to expand (or contract). The multi-degree-of-freedom telescopic rod 2 is composed of a plurality of sections of telescopic rods, four sections are taken as an example in the embodiment, namely a first section of telescopic rod 2-1, a second section of telescopic rod 2-2, a third section of telescopic rod 2-3 and a fourth section of telescopic rod 2-4 are arranged from the front part to the bottom part and are sleeved at one time. First festival shrink pole can contract to second festival shrink pole, and the second festival shrink pole can contract to third festival shrink pole, and third festival shrink pole can contract to fourth festival shrink pole. The slide rail grooves are a first section of slide rail groove 2-1-1, a second section of slide rail groove 2-1-2 and a third section of slide rail groove 2-1-3 which are communicated with each other.

As shown in fig. 4, the three-dimensional structure of the utility model facilitates the display of the structures of the backrest and the armrests. Like most wheelchairs, the utility model also comprises a backrest 1 and two side armrests 12, wherein the two side armrests 12 are respectively hinged with the backrest 1, the two side armrests 12 are respectively hinged with a stool surface 10 through armrest connecting rods 11, so that the backrest 1, the one side armrests 12, the armrest connecting rods 11 and the stool surface 10 form a parallelogram, and the front telescopic rod is hinged with the common hinged end of one side armrest 12 and the backrest 1. Meanwhile, when the stool surface 10 descends (ascends), the backrest 1 and the armrest connecting rod 11 rotate and contract and fold (unfold) (the backrest 1, the armrests 12, the armrest connecting rod 11 and the stool surface 10 form a parallelogram mechanism).

An accommodating groove is formed in the slider connecting rod 5, and the first supporting rod 6-1 and the second supporting rod 6-2 are folded and hidden in the accommodating groove of the slider connecting rod 5. Folding grooves 10-3 are formed in the stool surface 10 and are positioned on the inner sides of the armrests 12, and when the electric folding wheelchair is in a folded state, the sliding block connecting rod 5 is hidden in a space formed by the folding grooves 10-3 and the sliding block rails 13. The stool surface 10 is provided with a telescopic groove 10-2, the multi-degree-of-freedom telescopic rod 2 penetrates through the telescopic groove 10-2 and is supported at the common hinged end of the armrest 12 and the backrest 1, and when the wheelchair is completely folded, the multi-degree-of-freedom telescopic rod 2 contracts and rotates in the telescopic groove 10-2.

As shown in figure 5, in the side structure of the utility model, the slide block 15 is connected with a right-angle push rod 9, the slide moves to the right, the right-angle push rod 9 on the slide block is driven to move to the right, a pedal 8 positioned in the front is touched, and the pedal 8 is generally arranged at the front lower part of the wheelchair and is driven to rotate to be vertical to the ground.

Fig. 6 and 7 show two state diagrams of the folding and unfolding states of the stool respectively, and as seen from fig. 6, the stool can fully utilize space and contract a plurality of components, and as seen from fig. 7, the stool can form self-locking and is stable in structure, and the stool cannot translate when the stool surface is lifted.

Although the embodiments have been described and illustrated separately, it will be apparent to those skilled in the art that some common techniques may be substituted and integrated between the embodiments, and reference may be made to one of the embodiments not explicitly described, or to another embodiment described.

The foregoing is illustrative of the preferred embodiments of the present invention only and is not to be construed as limiting the claims. The present invention is not limited to the above embodiments, and the specific structure thereof is allowed to vary. In general, all changes which come within the scope of the utility model as defined by the independent claims are intended to be embraced therein.

Claims

1. An electric folding wheelchair comprises a chassis (7), wheels (4), a stool surface (10) and a lifting mechanism, wherein the wheels (4) are mounted on the chassis (7) and used for supporting and driving the chassis (7) to move, the stool surface (10) is positioned above the chassis (7), the lifting mechanism is mounted on the chassis (7), and the upper part of the lifting mechanism is connected to the stool surface (10) and used for driving the stool surface (10) to lift; the method is characterized in that:

the lifting mechanism comprises a slider connecting rod mechanism and a support rod mechanism, the slider connecting rod mechanism comprises a crank (3), a slider connecting rod (5) and a slider (15), one end of the crank (3) is hinged to the base plate (7), the other end of the crank is connected to the middle of the slider connecting rod (5), one end of the slider connecting rod (5) is connected to the slider (15), the other end of the slider connecting rod is hinged to the stool surface (10), and the slider (15) is matched with a slider rail (13) on the base plate (7); the supporting rod mechanism comprises a first supporting rod (6-1) and a second supporting rod (6-2) which are hinged to each other, one end of the first supporting rod (6-1) is hinged to the sliding block (15), the other end of the first supporting rod is hinged to the second supporting rod (6-2), and the other end of the second supporting rod (6-2) is hinged to the stool surface (10).

2. The electrically powered folding wheelchair as claimed in claim 1, wherein: the telescopic rod (2) comprises a plurality of telescopic rods which are sleeved in a multi-section manner, wherein the telescopic rod at the bottom is hinged in the middle of the slide block connecting rod, and the telescopic rod at the front part is used for driving the folding and unfolding of the backrest (1) and the handrail (12).

3. The electrically powered folding wheelchair as claimed in claim 2, wherein: still include back (1) and both sides handrail (12), both sides handrail (12) are articulated with back (1) respectively, both sides handrail (12) are articulated with bench face (10) through handrail connecting rod (11) respectively for back (1), one side handrail (12), handrail connecting rod (11) and bench face (10) constitute parallelogram, anterior shrink pole articulates in the public hinged end of one of them side handrail (12) and back (1).

4. The electrically powered folding wheelchair as claimed in claim 2, wherein: a stool surface slide rail (10-1) is arranged on the side surface of the stool surface (10); the stool surface slide rail (10-1) is internally provided with a telescopic rod slide block (14-4), the telescopic rod slide block (14-4) is provided with a slide block pin (14-4-1), and the multi-degree-of-freedom telescopic rod (2) is provided with a slide rail groove for the slide block pin (14-4-1) to be placed in and slide.

5. The electrically powered folding wheelchair as claimed in claim 1, wherein: a containing groove is formed in the slider connecting rod (5), and the first supporting rod (6-1) and the second supporting rod (6-2) are hidden in the containing groove of the slider connecting rod (5) after being folded.

6. The electrically powered folding wheelchair as claimed in claim 2, wherein: the wheelchair is characterized in that a telescopic groove (10-2) is formed in the stool surface (10), the multi-degree-of-freedom telescopic rod (2) penetrates through the telescopic groove (10-2) and is supported at the common hinged end of the armrest (12) and the backrest (1), and when the wheelchair is completely folded, the multi-degree-of-freedom telescopic rod (2) is contracted and rotates in the telescopic groove (10-2).

7. The electrically powered folding wheelchair as claimed in claim 2, wherein: folding grooves (10-3) are formed in the positions, located on the inner sides of the armrests (12), of the stool surface (10), and when the electric folding wheelchair is in a folding state, the sliding block connecting rods (5) are hidden in spaces formed by the folding grooves (10-3) and the sliding block rails (13) together.

8. The electrically powered folding wheelchair according to any one of claims 1 to 7, characterized in that: the sliding block (15) is connected with a right-angle push rod (9), the sliding block moves rightwards to drive the right-angle push rod (9) on the sliding block to move rightwards, a pedal (8) located in front is touched, and the sliding block rotates to be perpendicular to the ground.