CN107773361A - A kind of fast folding of Comfortable electric wheel-chair is taken down the exhibits device - Google Patents

Abstract

A fast folding and retracting device for an electric leisure wheelchair, comprising a left connecting rod, a left connecting block, a right connecting block, a right connecting rod, a main shaft, a hand dial rotating shaft, a fixed hook, a return spring and a fixed shaft, and the left connecting block There are mutually matching ear seats on the right connecting block, and a rotating hinge structure is formed between the left connecting block and the right connecting block through the main shaft. There is a mounting groove on the left connecting block, and the hand dial shaft is rotatably installed on the left connecting block. On the top, the fixed hook is fixedly connected with the dial shaft and is located in the installation groove. The hand shaft is parallel to the main shaft. The return spring is arranged between the fixed hook and the installation end of the left connecting block. Groove, the fixed shaft is fixedly arranged in the draw-in groove, and the fixed shaft is parallel to the main shaft. When the left connecting rod and the right connecting rod are in a collinear state, the hook end of the fixed hook is fixedly clamped on the fixed shaft. It is light and flexible to fold, and is especially suitable for folding electric wheelchairs.

Description

A fast folding and retracting device for an electric recreational wheelchair

technical field

The invention relates to an electric fast folding wheelchair, in particular to a fast folding and retracting device for a folding electric chair.

Background technique

With the increase of the elderly population in the society, the problem of social aging has become more and more prominent, and the travel problems of the elderly and the disabled have not been well resolved. Although the market has developed electric leisure wheelchairs for them now, there are two kinds of three-wheeled electric vehicles and four-wheeled electric vehicles, but this type of electric wheelchair also has the following defects in actual use:

① These models are all evolved from human-powered tricycles. The front frame of this type of electric tricycle is an old-fashioned hurdle type. The hands and feet of the elderly and disabled people are not as flexible as normal young people, and it is very inconvenient to get on and off the car.

②The whole vehicle does not have the function of dismantling and stacking, and the parking area is large. For the elderly who live in high-rise buildings in cities and towns, the storage problem of electric tricycles is very serious, especially for families without garages. For them, the old people dare not ask for it, because they are afraid of being stolen outside, and because they are too large and heavy, they cannot be taken upstairs, and they cannot be taken upstairs by elevator, so it is inconvenient to carry.

3. function is single, does not possess leisure functions such as sitting and lying down, and existing electric tricycle can only carry people to walk, and when the old man feels tired, can not satisfy the leisure functions such as sitting, lying down of the old man.

4. the existing portable electric tricycle can only be used by a single person, and is not suitable for the elderly to pick up and send children to school or bring their wives to go to school.

⑤ The stability of the car on one side is not good, it is easy to rollover, and the safety of use is poor.

It is disclosed in the patent 201620246239.1 that the whole vehicle can be folded front and rear, which can reduce the storage space. This is a typical model of folding electric recreational wheelchair at present, but the structure is complicated, and the size after folding is relatively large, and the folding mechanism is retracted. The convenience performance is poor, the structure is relatively complicated, and the unfolding is cumbersome and time-consuming. It is difficult to meet the requirements of the elderly and the disabled for flexible folding, convenient use, and lightweight vehicles. Among them, the most prominent It is the flexibility of folding and folding, which must be improved.

Invention content:

The object of the present invention is to provide a fast folding and unfolding device for an electric leisure wheelchair, which is convenient and quick to disassemble and flexible to unfold and unfold.

The technical scheme that the present invention takes is:

A fast folding and retracting device for an electric leisure wheelchair, characterized in that it includes a left connecting rod, a left connecting block, a right connecting block, a right connecting rod, a main shaft, a hand dial rotating shaft, a fixed hook, a return spring and a fixed shaft, The left connecting block is arranged on one end of the left connecting rod, the right connecting block is arranged on one end of the right connecting rod, and the connecting ear sockets which cooperate with each other are arranged on the left connecting block and the right connecting block, and the left connecting block and the right connecting block pass through Connect the ear seat and the main shaft to form a rotating hinge structure. The rotation angle between the left connecting block and the right connecting block is 0°～180°. There is a mounting groove on the left connecting block, and the hand dial shaft is rotatably installed on the left connecting block. , the fixed hook is fixedly connected with the hand dial shaft, the fixed hook is located in the installation groove, the hand dial shaft is parallel to the main shaft, a return spring is provided between the fixed hook and the installation end of the left connecting block, and the opening on the right connecting block There is a draw-in slot, and the fixed shaft is fixedly arranged in the draw-in slot, and the fixed shaft is parallel to the main shaft. When the left connecting rod and the right connecting rod are in the co-linear unfolding state, the hook end of the fixed hook is fixedly mounted on the fixed shaft.

In the above scheme, the rotating hinge structure is formed between the left connecting block and the right connecting block: there are through holes on the connecting ear seats of the left connecting block and the right connecting block, when the connecting ears of the left connecting block and the right connecting block When the seat is in the state of mutually fitting in place, the main shaft is installed in the through hole of the left connecting block and the right connecting block. The fit between the through holes is a clearance fit.

In the above scheme, the rotating hinge structure is formed between the left connecting block and the right connecting block: there are through holes on the connecting ear seats of the left connecting block and the right connecting block, when the connecting ears of the left connecting block and the right connecting block When the seats are mutually fitted in place, the main shaft is installed in the through holes of the left connecting block and the right connecting block. The fit between the holes is an interference fit.

In the above scheme, the installation structure of the return spring between the fixed hook and the left connecting block is: an upper spring hole is provided at the bottom of the fixed hook installation end, a lower spring hole is provided on the left connecting block, and the return spring is installed Inside the upper and lower spring holes.

In the above solution, a pressing wrench is provided at the exposed end of the rotary shaft of the hand dial.

The folding connection relation of each part among the present invention is as follows:

When folding, pull the pressing wrench of the folding and retracting device upwards to drive the rotating shaft to rotate, and the rotating shaft drives the fixed hook to turn upwards and disengage from the fixed shaft to realize folding. When stretching, the left connecting rod and the right connecting rod are rotated to a parallel state through the main shaft. At this time, the hook end of the fixed hook is fixedly clamped on the fixed shaft to realize stretching and locking.

Description of drawings:

Fig. 1 is a schematic diagram of the three-dimensional structure of the present invention when it is in an open state;

Fig. 2 is a schematic cross-sectional structural view of the present invention in an unfolded state;

Fig. 3 is a schematic diagram of the installation structure of the left connecting rod, the left connecting block, the rotating shaft and the fixing hook;

Fig. 4 is a schematic structural view of the fast folding and retractable electric leisure wheelchair in an unfolded state;

Figure 5 is a perspective view of Figure 4;

Fig. 6 is a schematic structural diagram of the folded state of the fast-folding and retractable electric leisure wheelchair;

Figure 7 is a perspective view of Figure 6;

Fig. 8 is a schematic diagram of the structure of the rotating device in a straight line state;

Fig. 9 is a schematic diagram of the structure of the rotating device in a vertical state;

In the figure: 1-front frame; 2-pedal frame; 3-connecting bridge frame; 4-seat frame; 5-rear frame; 6-back frame; 7-folding device; 8-front wheel; 9-rear Wheel; 10-lifting device; 11-handle; 12-steering rod; 13-front wheel steering fixed sleeve; 14-rotating device; 51-rear wheel rod; 52-U-shaped connecting rod; Lower connecting rod; 55-battery frame; 61-inverted U-shaped frame; 62-armrest; 71-left connecting rod; 72-left connecting block; 73-right connecting block; 74-right connecting rod; 75-main shaft; 76- Hand dial shaft; 77-fixed hook; 78-return spring; 79-fixed shaft; 80-through hole; 721-installation groove; 731-card slot; 732-lower spring hole; end; 772-upper spring hole.

Detailed ways

The specific embodiment of the present invention is described below in conjunction with accompanying drawing:

Use a kind of fast foldable retractable type electric recreational wheelchair vehicle of the present invention, as shown in Figure 1-Figure 9, comprise front vehicle frame 1, pedal frame 2, connecting bridge frame 3, seat frame 4, rear vehicle frame 5, backrest frame 6. Folding and retracting device 7, front wheel 8 and two rear wheels 9. The front frame 1 includes a handle 11, a steering rod 12 and a front wheel steering sleeve 13, and the handle 11 is fixedly installed on the top of the steering rod 12. The steering rod 12 is rotatably set in the front wheel steering fixed sleeve 13, and the front wheel 8 is installed on the bottom end of the steering rod 12 through the wheel shaft; the rear vehicle frame 5 includes two rear wheel rods 51, U-shaped connecting rods 52, The upper connecting rod 53, the lower connecting rod 54 and the battery frame 55, the two ends of the upper connecting rod 53 are respectively fixedly connected to the upper ends of the two rear wheel rods 51, and the two ends of the lower connecting rod 54 are respectively fixedly connected to the ends of the two rear wheel rods 51. At the lower end, the upper connecting rod 53 and the lower connecting rod 54 are perpendicular to the two rear wheel rods 51, and the two ends of the U-shaped connecting rod 52 are fixedly connected to the two rear wheel rods 51 between the upper connecting rod 53 and the lower connecting rod 54, The battery frame 55 is fixedly installed between the upper connecting rod 53 and the lower connecting rod 54, and the two rear wheels 9 are installed on the bottom ends of the two rear wheel rods 51 through the axle; In the middle of the front end of the pedal frame 2, the rear end of the pedal frame 2 is connected to the front end of the connecting bridge 3 through two folding and expanding devices 7, and the rear end of the connecting bridge 3 is connected to the lower connecting rod 54 of the rear frame 5 through two folding and expanding devices 7. Connected, the rear end of the seat frame 4 is fixedly installed on the two rear wheel bars 51 above the upper connecting rod 53 through two folding and unfolding devices 7, the seat frame 4 is parallel to the connecting bridge frame 3, and the backrest frame 6 is formed by an inverted U-shaped frame 61 and armrest 62, the bottom end of the inverted U-shaped frame 61 is fixedly connected to the tops of the two rear wheel rods 51, the armrests 62 are fixedly connected to both sides of the inverted U-shaped frame 61, and the two ends of the inverted U-shaped frame 61 The vertical bar is perpendicular to the seat frame 4, and the folding and unfolding device 7 includes a left connecting rod 71, a left connecting block 72, a right connecting block 73, a right connecting rod 74, a main shaft 75, a hand rotating shaft 76, a fixed hook 77, a reset Spring 78 and fixed shaft 79, left connecting block 72 is arranged on an end of left connecting rod 71, and right connecting block 73 is arranged on an end of right connecting rod 74, is provided with the connection that cooperates mutually on left connecting block 72 and right connecting block 73. The ear seat, the left connecting block 72 and the right connecting block 73 form a rotating hinge structure by connecting the ear seat and the main shaft 75, and the rotation angle between the left connecting block 72 and the right connecting block 73 is 0°～180°. 72 is provided with a mounting groove 721, the hand dial rotating shaft 76 is rotatably installed on the left connecting block 72, the fixed hook 77 is fixedly connected with the hand dial rotating shaft 76, the fixed grab 77 is located in the mounting groove 721, and the hand dial rotating shaft 76 is connected to the The main shaft 75 is parallel, and a back-moving spring 78 is provided between the mounting end of the fixed hook 77 and the left connecting block 72, and a draw-in groove 731 is provided on the right connecting block 73, and the fixed shaft 79 is fixedly arranged in the draw-in groove 731, and the fixed shaft 79 is parallel to the main shaft 75, when the left connecting rod 71 and the right connecting rod 74 are in the collinear unfolded state, the grab of the fixed grab 77 End 771 is fixedly clamped on the fixed shaft 79; in this scheme, the rotating hinge structure formed between the left connecting block 72 and the right connecting block 73 is: on the connecting lugs of the left connecting block 72 and the right connecting block 73, open There is a through hole 80. When the connecting lugs of the left connecting block 72 and the right connecting block 73 are in the state of mutual fitting, the main shaft 75 is installed in the through hole 80 of the left connecting block 72 and the right connecting block 73, wherein the main shaft 75 and The cooperation between the through holes 80 on the left connecting block 72 is an interference fit, and the cooperation between the main shaft 75 and the through holes 80 on the right connecting block 73 is a clearance fit; The mounting structure between 72 is: the upper spring hole 772 is provided at the bottom end of the fixed hook 77 installation end, the lower spring hole 732 is provided on the left connecting block 72, and the return spring 78 is installed in the upper spring hole 772 and the lower spring hole 732; the exposed end of the hand dial rotating shaft 76 is provided with a pressing wrench 761; a lifting device 10 is arranged between the backrest frame 6 and the two rear wheel bars 51, and the backrest frame 6 can be adjusted in height by the lifting device 10; Steering rod 12 above the fixed sleeve 13 is provided with a rotating device 14, and the steering rod 12 can rotate through the rotating device 14 to change the angle between the steering rod 12 and the front wheel steering fixed sleeve 13.

Embodiment 2: The difference from Embodiment 1 is that the rotating hinge structure is formed between the left connecting block 72 and the right connecting block 73: there are through holes on the connecting lugs of the left connecting block 72 and the right connecting block 73 80, when the connecting lugs of the left connecting block 72 and the right connecting block 73 are in the state of mutual fitting, the main shaft 75 is installed in the through hole 80 of the left connecting block 72 and the right connecting block 73, wherein the main shaft 75 and the left connecting block The fit between the through holes 80 on the 72 is clearance fit, and the fit between the main shaft 75 and the through holes 80 on the right connecting block 73 is an interference fit.

The seat frame of this fast folding and retractable electric recreational wheelchair is turned upwards through the folding and unfolding device, the connecting bridge is turned upwards through the folding and unfolding device, the pedal frame is turned downwards through the folding and unfolding device, and the rotating device is rotated from a straight state to Vertical state, during this process, the seat frame, connecting bridge frame and pedal frame are turned from a horizontal state to a vertical state, the front frame shrinks toward the rear frame in the length direction to achieve the maximum shrinkage of the whole vehicle in the length direction, and the steering rod passes through the rotating device Turn the front wheel between the two rear wheels so that the front frame shrinks in the height direction to achieve the maximum shrinkage of the vehicle in the height direction. The length of the vehicle in the unfolded state is 100 cm, and the size in the length direction after folding is only 28 cm. centimeters, while the length of the existing similar foldable tricycles is 120 centimeters, and the folded length is 65 centimeters, which is reduced by 37 centimeters in the length direction, and the width of the car is further reduced, so that it can enter and exit the elevator, and can also be used in the train. The box can be dragged freely on the sidewalk, which is more convenient for indoor placement. After folding, it takes up less space. After folding, the rider can use the two rear wheels as rollers to pull the trailer just as long as he holds the upper cross bar of the backrest frame. Row. When unfolding, turn the connecting pedal frame upwards, and turn the connecting bridge frame downwards, so that the pedal frame and the connecting bridge frame are on the same plane, turn the seat frame down so that the connecting bridge frame is parallel, and press the wrench 761 of the folding and unfolding device at all connections. Pull upwards to drive the rotating shaft to rotate, and the rotating shaft drives the fixed hook to turn upwards, then fit the connecting surface of the left connecting rod and the right connecting rod together, release the pressing wrench, and the return spring resets the fixed hook, so that the fixed hook The hook end is fixedly mounted on the fixed shaft, so that the left connecting rod 71 and the right connecting rod 74 are fixedly connected. When the whole vehicle is unfolded, the folding of all foldable parts due to internal force is limited by the folding device to ensure that the whole The car runs smoothly. Because the pedal frame has a large space, an additional small stool can be installed on the pedal frame when a child is to be taken. This kind of electric tricycle can be folded and has a smaller volume. After being folded, it can enter the elevator and go upstairs, so it occupies a small space at home; there are no barriers for passengers to get on and off the car, ensuring the safety of getting on and off the car; it can be ridden alone , You can also pick up and drop off children to school. The vehicle frame tube body of the present invention is made of aluminum alloy, and the weight of the whole vehicle is only 18 kg, while the weight of the existing product is 25 kg, which not only realizes the lightweight of the whole vehicle, but also has a vehicle capacity of up to 150 kg.

This model not only has the flexibility of a tricycle, but also the stability of a four-wheeler. The most important thing is that it realizes the fast and convenient folding and retracting of the frame, which is convenient for the elderly and disabled.

It will be apparent to those skilled in the art that the invention is not limited to the details of the above-described exemplary embodiments, but that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Accordingly, the embodiments should be regarded in all points of view as exemplary and not restrictive, the scope of the invention being defined by the appended claims rather than the foregoing description, and it is therefore intended that the scope of the invention be defined by the appended claims rather than by the foregoing description. All changes within the meaning and range of equivalents of the elements are embraced in the present invention. Any reference sign in a claim should not be construed as limiting the claim concerned.

In addition, it should be understood that although this specification is described according to implementation modes, not each implementation mode only contains an independent technical solution, and this description in the specification is only for clarity, and those skilled in the art should take the specification as a whole , the technical solutions in the various embodiments can also be properly combined to form other implementations that can be understood by those skilled in the art.

Claims (5)

1. The device 1. a kind of fast folding of Comfortable electric wheel-chair is taken down the exhibits, it is characterized in that：Including left connecting rod (71), left contiguous block (72), right contiguous block (73), right connecting rod (74), main shaft (75), hand switch axle (76), fixed grab (77), back-moving spring (78) and fixing axle (79), left contiguous block (72) are arranged on one end of left connecting rod (71), and right contiguous block (73) is arranged on right company One end of extension bar (74), the connection ear mount to cooperate, left contiguous block are provided with left contiguous block (72) and right contiguous block (73) (72) rotary hinge structure, left contiguous block (72) and the right side are formed by connecting ear mount and main shaft (75) between right contiguous block (73) Corner between contiguous block (73) is 0 °~180 °, mounting groove (721) is provided with left contiguous block (72), hand switch axle (76) can It is rotatably mounted on left contiguous block (72), fixed grab (77) is fixedly connected with hand switch axle (76), fixed grab (77) position In mounting groove (721), hand switch axle (76) is parallel with main shaft (75), in the installation of fixed grab (77) and left contiguous block (72) Back-moving spring (78) is provided between end, neck (731) is provided with right contiguous block (73), fixing axle (79) is fixedly installed on neck (731) in, fixing axle (79) is parallel with main shaft (75), and conllinear deployed condition is in left connecting rod (71) and right connecting rod (74) When, grab end (771) fixing card of fixed grab (77) is in fixing axle (79).
2. 2. the fast folding of Comfortable electric wheel-chair is taken down the exhibits device according to claim 1, it is characterized in that：Left contiguous block (72) Rotary hinge structure is formed between right contiguous block (73) is：In the connection ear mount of left contiguous block (72) and right contiguous block (73) Through hole (80) is provided with, when the connection ear mount of left contiguous block (72) and right contiguous block (73) is in mutual sheathing state in place, Main shaft (75) is arranged in the through hole (80) of left contiguous block (72) and right contiguous block (73), wherein, main shaft (75) and left contiguous block (72) matching somebody with somebody between the through hole (80) on is combined into interference fit, between the through hole (80) on main shaft (75) and right contiguous block (73) Coordinate with gap is combined into.
3. 3. the fast folding of Comfortable electric wheel-chair is taken down the exhibits device according to claim 1, it is characterized in that：Left contiguous block (72) Rotary hinge structure is formed between right contiguous block (73) is：In the connection ear mount of left contiguous block (72) and right contiguous block (73) Through hole (80) is provided with, when the connection ear mount of left contiguous block (72) and right contiguous block (73) is in mutual sheathing state in place, Main shaft (75) is arranged in the through hole (80) of left contiguous block (72) and right contiguous block (73), wherein, main shaft (75) and left contiguous block (72) matching somebody with somebody between the through hole (80) on it is combined into gap to coordinate, between the through hole (80) on main shaft (75) and right contiguous block (73) It is interference fitted with being combined into.
4. 4. the fast folding of Comfortable electric wheel-chair is taken down the exhibits device according to claim 1, it is characterized in that：Back-moving spring (78) It is in the mounting structure fixed between grab (77) and left contiguous block (72)：Upper bullet is provided with fixed grab (77) installation end bottom Spring hole (772), lower spring hole (732) are provided with left contiguous block (72), back-moving spring 78 be arranged on front upper spring opening (772) and under In spring eye (732).
5. 5. the fast folding of Comfortable electric wheel-chair is taken down the exhibits device according to claim 1, it is characterized in that：In hand switch axle (76) exposed junction is provided with pressing spanner (761).