Battery electrical connection structure of electric wheelchair

Abstract

The utility model discloses a battery electrical connection structure of an electric wheelchair, and belongs to the field of daily necessities. The electric wheelchair comprises a wheelchair body provided with a pair of front universal wheels and a pair of rear driving wheels. The middle part of the battery box fixing shaft is fixed below one side, facing the pair of rear driving wheels, of the vehicle body; each battery box is provided with a battery box cavity for accommodating a battery in a plugging manner, the battery boxes are arranged on the left side and the right side of the vehicle body, one ends of the battery boxes are fixed with the vehicle body, and the other ends of the battery boxes are fixed with the end parts of the battery box fixing shafts; the positions, corresponding to the front ends of battery box cavities of the pair of battery boxes, of the pair of battery electrical connection seats are matched with the pair of battery boxes in an inserted and embedded mode, and the battery electrical connection seats are electrically connected with an electrical control box arranged on the vehicle body through battery electrical connection wires. The battery box has the advantages that extra electrical connection or electrical connection releasing operation does not need to be carried out on the battery electrical connecting wire of the power supply connecting pin after the battery is inserted into the battery box cavity and before the battery is pulled out of the battery box cavity, and the battery plugging and pulling convenience is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to daily necessities technical field, concretely relates to a battery electrical connection structure of electric wheelchair. BACKGROUND

[0002] People will electric wheelchair be called "electric wheelchair", relative to manual or hand push wheelchair, the advantage of electric wheelchair is: first, it helps to improve the freedom of travel, can easily deal with various terrains indoors and outdoors under the electric drive, reduce the burden of accompanying personnel, enhance the independence of the user, second, it is beneficial to increase safety, because electric wheelchair usually has brake system, anti-overturning device, can emergency brake and reduce the probability of accident, third, it is beneficial to meet the functional diversification and individualization requirements, such as rehabilitation training mode, individualized customization service, etc. In the disclosed Chinese patent documents, a large amount of technical information of electric wheelchair can be seen, such as CN201379725Y recommends "obstacle avoidance electric wheelchair", CN101589979B introduces "multi-functional electric wheelchair", CN201684098U provides "electric wheelchair" and CN202682215U discloses "electric wheelchair", etc.

[0003] As known in the industry, the power source of electric wheelchair comes from the batteries respectively arranged in a pair of battery boxes (also called "battery box", the same below) on both sides of the vehicle, and the pair of batteries form a plug-in structure with the battery box, and the reason why the pair of batteries form a plug-in structure with the battery box is because of the following factors, not limited to: convenient for quick battery replacement, that is, to meet the needs of users to quickly and easily replace the battery without disassembling the battery box as a whole, which is particularly important for those who need to use electric wheelchair frequently, because it can significantly save time; easy to maintain, when the battery needs to be replaced or repaired, the plug-in structure makes the operation more simple and fast, which is beneficial to reduce the difficulty and cost; safety, because the plug-in structure is usually designed with an anti-short circuit mechanism to ensure that the positive and negative poles of the battery do not directly contact during plugging, avoiding the risk of short circuit; fixed and stable, which is beneficial to the stable limitation of the battery in the battery box during vehicle driving, and will not fall off or shift due to vibration; compatibility factor, as the battery box and battery of electric wheelchair tend to be standardized design, the plug-in structure is helpful for the compatible replacement between different brands and models of batteries, prompting the flexibility of user selection; convenient for battery upgrade, for example, you can replace the battery with larger capacity and better performance according to your needs, to improve the endurance and service life; positioning is relatively accurate and can be locked stably. In short, the plug-in cooperation of the battery and the battery box is designed based on humanization and technical perfection factors.

[0004] However, the electrically powered wheelchair in the prior art including the above-mentioned patent has the following common disadvantages: whenever the battery is inserted into the battery box, the power connection pins led out from the electric control box by means of wires (i.e. lines) need to be connected to the battery in a manual operation mode. Conversely, before the battery is pulled out of the battery box, the aforementioned power connection pins also need to be pulled off to release the connection with the battery in a manual operation mode. As can be seen from the above, whether the battery is inserted into or pulled out of the battery box, additional operation of the power connection pins is required, thus causing certain inconvenience and affecting the convenience of battery insertion and pulling. Utility model content

[0005] The task of the utility model is to provide a battery electrical connection structure of an electrically powered wheelchair, which can improve the convenience of battery insertion and pulling without additional operation of the power connection pins.

[0006] The task of the utility model is achieved in the following way: a battery electrical connection structure of an electrically powered wheelchair, the electrically powered wheelchair comprising a vehicle body having a pair of front universal wheels and a pair of rear drive wheels each driven by an electric motor; a battery box fixing shaft, the middle part of the battery box fixing shaft being fixed to the lower side of the vehicle body towards the pair of rear drive wheels; a pair of battery boxes each having a battery box cavity for accommodating battery insertion and pulling, the pair of battery boxes being arranged on the left and right sides of the vehicle body in a left-right corresponding state, one end of each battery box being fixed to the vehicle body and the other end being fixed to the end part of the battery box fixing shaft; the battery electrical connection structure comprising a pair of battery electrical connection seats, the pair of battery electrical connection seats being inserted into the pair of battery boxes at the positions corresponding to the front ends of the battery box cavities of the pair of battery boxes, and being electrically connected to the electric control box arranged on the vehicle body by means of battery electrical connection lines; when the pair of batteries are inserted into the battery box cavities, the pair of batteries automatically establish an electrical connection relationship with the pair of battery electrical connection seats; and when the pair of batteries are pulled out of the battery box cavities, the pair of batteries automatically release the electrical connection relationship with the pair of battery electrical connection seats.

[0007] In one specific embodiment of the utility model, the pair of battery electrical connection seats each has a cavity opening facing forward, and each has a battery electrical connection line accommodation recess on the wall body of the pair of battery electrical connection seats, and a pair of battery electrical connection poles are fixed on the cavity bottom wall of the battery electrical connection seat cavity, the pair of battery electrical connection poles pass through the cavity bottom wall and protrude into the battery box cavity of the battery box, one end of the battery electrical connection line is electrically connected with the pair of battery electrical connection poles in the battery electrical connection seat cavity, and the other end of the battery electrical connection line is led out of the battery electrical connection seat cavity through the battery electrical connection line accommodation recess and is electrically connected with the electrical control box, when the pair of batteries are inserted into the battery box cavity, the battery positive and negative pole insertion holes of the pair of batteries facing the one end of the pair of battery electrical connection poles are inserted and matched with the pair of battery electrical connection poles to automatically establish an electrical connection relationship, and when the pair of batteries are pulled out of the battery box cavity, the battery positive and negative pole insertion holes of the pair of batteries are separated from the pair of battery electrical connection poles to automatically release the electrical connection relationship.

[0008] In another specific embodiment of the utility model, a group of battery electrical connection seat fixing screw columns are formed in the battery electrical connection seat cavity, a motor connection seat fixing plate is formed on the motor and at a position corresponding to the front end of the battery box, a transition connection plate fixing plate is fixed on the front end of the pair of battery boxes and at a position corresponding to the front of the battery electrical connection seat, and a motor connection seat transition connection plate is fixed on the side of the motor connection seat fixing plate facing the transition connection plate fixing plate, the upper end of the motor connection seat transition connection plate is connected with the transition connection plate fixing plate, the middle part of the transition connection plate fixing plate is fixed with the group of battery electrical connection seat fixing screw columns, and the motor connection seat transition connection plate is fixed with the motor connection seat fixing plate through a group of motor connection seat transition connection plate screws.

[0009] In another specific embodiment of the utility model, a pair of mutually vertically parallel and protruding from the surface of the motor connection seat transition connection plate insertion flanges are formed on the middle rear side of the motor connection seat transition connection plate in the height direction, and a pair of mutually vertically parallel and corresponding with the insertion flanges and recessed from the surface of the transition connection plate fixing plate insertion flange insertion grooves are formed on the middle front side of the transition connection plate fixing plate in the height direction, and the pair of insertion flanges and the pair of insertion flange insertion grooves are inserted and matched.

[0010] In another specific embodiment of the utility model, the cross-sectional shape of the pair of insertion flanges is dovetail-shaped, and the cross-sectional shape of the pair of insertion flange insertion grooves is also dovetail-shaped.

[0011] In still another specific embodiment of the utility model, a pair of battery electrical connection seat fixing screws are arranged on the transition connecting plate fixing plate, and the pair of battery electrical connection seat fixing screws are fixed with the pair of battery electrical connection seat fixing screw columns.

[0012] In still another specific embodiment of the utility model, a pair of battery electrical connection seat fixing screws are arranged on the transition connecting plate fixing plate, and the pair of battery electrical connection seat fixing screws are fixed with the pair of battery electrical connection seat fixing screw columns.

[0013] In still another specific embodiment of the utility model, a pair of battery electrical connection seat fixing screws are arranged on the transition connecting plate fixing plate, and the pair of battery electrical connection seat fixing screws are fixed with the pair of battery electrical connection seat fixing screw columns.

[0014] In still another specific embodiment of the utility model, a pair of battery electrical connection seat fixing screws are arranged on the transition connecting plate fixing plate, and the pair of battery electrical connection seat fixing screws are fixed with the pair of battery electrical connection seat fixing screw columns.

[0015] In still another specific embodiment of the utility model, the motor is electrically connected with the electrical control box.

[0016] The technical effect of the technical scheme provided by the utility model lies in that: since the battery electrical connection structure adopts a pair of battery electrical connection seats, and the battery electrical connection seats are inserted into the battery box cavity and are electrically connected with the electrical control box arranged on the vehicle body through battery electrical connection lines, when the pair of batteries are inserted into the battery box cavity, the pair of batteries can automatically establish an electrical connection relationship with the pair of battery electrical connection seats, and vice versa, the electrical connection relationship is automatically released, compared with the prior art, the battery electrical connection line of the power connection plug does not need to be additionally electrically connected or disconnected before and after the battery is inserted into the battery box cavity and pulled out of the battery box cavity, and the convenience of battery insertion and extraction is improved. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is an embodiment structure diagram of the utility model;

[0018] Figure 2 It is an embodiment structure diagram of the utility model; Figure 1 It is an enlarged view of A part of the utility model. DETAILED DESCRIPTION

[0019] In order to enable the technical essence and beneficial effects of the present application to be more clearly understood, the applicant will make a detailed description in the following manner by way of examples, but the description of the examples is not a limitation on the technical scheme of the present application, and any equivalent transformation made only in form but not in substance in accordance with the concept of the present application should be regarded as falling within the scope of the technical scheme of the present application.

[0020] In the following description, the directional or positional concepts of up, down, left, right, front and back are all based on the current Figure 1 position of the device as the reference, and thus should not be understood as a special limitation on the technical scheme provided by the present application.

[0021] First of all, the applicant needs to point out that: in the following, in addition to the battery electrical connection structure and the components related thereto being described in detail, the remaining components, although shown, will not be described in detail because they belong to the prior art, for example, reference can be made to CN103202748A (anti-rearward tilting electric wheelchair). In addition, since the battery electrical connection structure involved in the present application can be applied to all electric wheelchairs in the prior art, the following examples are not limited to the structure of the electric wheelchair shown. Figure 1 Figure 1

[0022] Please refer to Figure 1 and Figure 2 , which show a vehicle body 1 having a pair of front universal wheels 11 and a pair of rear drive wheels 12 each driven by an electric motor 121; a battery box fixing shaft 2 is shown, the middle part of which is fixed to the lower side of the vehicle body 1 towards the pair of rear drive wheels 12; a pair of battery boxes 4 each having a battery box cavity 41 for pluggable accommodation of a battery 3 is shown, the pair of battery boxes 4 are arranged on the left and right sides of the vehicle body 1 in a state of corresponding to each other, and one end is fixed to the vehicle body 1, while the other end (also referred to as "proximal middle part" or "proximal front end") is fixed to the end of the battery box fixing shaft 2; a pair of battery electrical connection seats 5 of the structural system of the battery electrical connection structure is shown, which correspond to the positions of the front ends of the battery box cavities 41 of the pair of battery boxes 4 and are inserted and fitted with the pair of battery boxes 4, and are electrically connected with an electrical control box 6 provided on the vehicle body 1 by a battery electrical connection line, after the pair of batteries 3 is inserted into the battery box cavities 41, the pair of batteries 3 automatically establishes an electrical connection relationship with the pair of battery electrical connection seats 5, and when the pair of batteries 3 is pulled out of the battery box cavities 41, the pair of batteries 3 automatically breaks the electrical connection relationship with the pair of battery electrical connection seats 5.

[0023] ​​The pair of battery electrical connection seats 5 each has a battery electrical connection seat cavity 51 with a cavity opening facing forward, and each has a battery electrical connection wire accommodation recess 52 formed on the wall of the pair of battery electrical connection seats 5 facing each other, and a pair of battery electrical connection poles 53 is fixed on the cavity bottom wall of the battery electrical connection seat cavity 51, the pair of battery electrical connection poles 53 penetrates through the cavity bottom wall and protrudes into the battery box cavity 41 of the battery box 4, one end of the battery electrical connection wire is electrically connected with the pair of battery electrical connection poles 53 in the battery electrical connection seat cavity 51, and the other end of the battery electrical connection wire is led out of the battery electrical connection seat cavity 51 through the battery electrical connection wire accommodation recess 52 and is electrically connected with the electric control box 6, when the pair of batteries 3 is inserted into the battery box cavity 41, the battery positive and negative pole insertion holes 31 of the pair of batteries 3 facing the one end of the pair of battery electrical connection poles 53 are inserted and matched with the pair of battery electrical connection poles 53 to automatically establish an electrical connection relationship, and when the pair of batteries 3 is pulled out of the battery box cavity 41, the battery positive and negative pole insertion holes 31 of the pair of batteries 3 are separated from the pair of battery electrical connection poles 53 to automatically release the electrical connection relationship.

[0024] A set of battery electrical connection seat fixing screw columns 511 is formed in the battery electrical connection seat cavity 51, a motor connection seat fixing plate 1211 is formed on the motor 121 and at a position corresponding to the front end of the battery box 4, a transition connection plate fixing plate 42 is fixed on the front end of the pair of battery boxes 4 and at a position corresponding to the front of the battery electrical connection seat 5, and a motor connection seat transition connection plate 7 is fixed on the side of the motor connection seat fixing plate 1211 facing the transition connection plate fixing plate 42, the upper end of the motor connection seat transition connection plate 7 is connected with the transition connection plate fixing plate 42 at the central position, and the middle part of the transition connection plate fixing plate 42 is fixed with the set of battery electrical connection seat fixing screw columns 511, and the motor connection seat transition connection plate 7 is fixed with the motor connection seat fixing plate 1211 through a set of motor connection seat transition connection plate screws 73.

[0025] Continue to see Figure 1 and Figure 2 A pair of horizontally parallel and protruding from the surface of the motor connection seat transition connection plate 7 insertion flanges 71 are formed on the rear side of the middle part of the motor connection seat transition connection plate 7 in the height direction, and a pair of horizontally parallel and recessed from the surface of the transition connection plate fixing plate 42 insertion flange insertion grooves 421 are formed on the front side of the middle part of the transition connection plate fixing plate 42 in the height direction, the pair of insertion flanges 71 and the pair of insertion flange insertion grooves 421 are inserted and matched. Preferably, the rear side of the transition connection plate fixing plate 42 is welded with the front end surface of the battery box 4.

[0026] The electric control box 6Figure 2 As shown, the cross-sectional shape of the aforementioned pair of insertion flange 71 is dovetail-shaped, and the cross-sectional shape of the aforementioned pair of insertion flange slot 421 is also dovetail-shaped.

[0027] By 1 and Figure 2 As shown, a pin shaft 72 is provided at the central position of the upper end of the aforementioned machine connecting seat transition connecting plate 7, and a pin shaft passing hole 422 is provided at the central position of the upper end of the aforementioned transition connecting plate fixing plate 42 and at the position corresponding to the aforementioned pin shaft 72, the rear end of the aforementioned pin shaft 72 extends to the rear side of the transition connecting plate fixing plate 42 through the pin shaft passing hole 422 and is limited by a pin shaft limiting member 721. A limiting member insertion hole 722 is provided at the rear end of the pin shaft 72, and in this embodiment, a split pin is used as the pin shaft limiting member 721 and is inserted into the limiting member insertion hole 722.

[0028] As a preferred solution, the aforementioned pin shaft 72 can use a pull-type spring pin with a spring, in which case, in the case of using a spring pin, the aforementioned pin shaft limiting member 721 is not required, having the advantages of simpler structure and more convenient operation.

[0029] A set of transition connecting plate fixing plate screws 423 is provided at the middle of the height direction of the aforementioned transition connecting plate fixing plate 42, which is fixed with the aforementioned set of battery electrical connecting seat fixing screws 511.

[0030] A mudguard fixing bracket 43 is fixed to the edge part of the outward side of the upper end of the aforementioned battery box 4, and a pair of bracket screw holes 431 are provided on the mudguard fixing bracket 43, and the mudguard 8 is fixed with the mudguard fixing bracket 43 by a pair of screws at positions corresponding to the pair of bracket screw holes 431.

[0031] Preferably, an insertion flange insertion limit position baffle 424 for blocking the end face of the aforementioned insertion flange 71 is formed on the aforementioned transition connecting plate fixing plate 42 and at the slot position corresponding to the inward side of one of the aforementioned pair of insertion flange slots.

[0032] The aforementioned motor 1211 is electrically connected to the aforementioned electrical control box 6 by corresponding electrical connecting lines.

[0033] Since the pair of battery positive and negative pole insertion holes 31 of the front end of the battery 3 correspond to the aforementioned battery electrical connection pole 53, when the pair of batteries 3 are inserted into the battery box cavity 41 of the pair of battery boxes 4, the aforementioned pair of battery positive and negative pole insertion holes 31 are inserted with the battery electrical connection pole 53, that is, the pair of battery electrical connection pole 53 is inserted into the pair of battery positive and negative pole insertion holes 31, the electrical circuit of the pair of batteries 3 is connected by the aforementioned battery electrical connection wire and the electrical control box 6 through the pair of battery electrical connection pole 53, and vice versa, which is not described again. Therefore, the structure of the utility model has the advantage of facilitating the quick replacement of the battery 3 compared with the prior art.

[0034] In summary, the technical scheme provided by the utility model makes up for the shortcomings in the prior art, successfully completes the invention task, and truly realizes the technical effects described by the applicant in the technical effect column above.

Claims

1. A battery electrical connection structure of a motorized wheelchair, said motorized wheelchair comprising a vehicle body (1) having a pair of front universal wheels (11) and a pair of rear drive wheels (12) each driven by a motor (121); a battery case fixing shaft (2) having a middle portion fixed to a lower side of said vehicle body (1) toward a side of said pair of rear drive wheels (12); a pair of battery cases (4) each having a battery case cavity (41) for pluggable accommodation of a battery (3), said pair of battery cases (4) being disposed at left and right sides of said vehicle body (1) in a state of corresponding to each other left and right, and one end being fixed to said vehicle body (1) and the other end being fixed to end portions of said battery case fixing shaft (2), characterized in that: The battery electrical connection structure comprises a pair of battery electrical connection seats (5) which are inserted into the front end of the battery box cavities (41) of the pair of battery boxes (4) and are electrically connected to the electrical control box (6) provided on the vehicle body (1) by battery electrical connection wires, and when the pair of batteries (3) are inserted into the battery box cavities (41), the pair of batteries (3) are automatically electrically connected to the pair of battery electrical connection seats (5), and when the pair of batteries (3) are pulled out of the battery box cavities (41), the pair of batteries (3) are automatically disconnected from the pair of battery electrical connection seats (5).

2. The battery electrical connection structure of the electrically powered wheelchair according to claim 1, characterized by: Each of the pair of battery electrical connection seats (5) has a battery electrical connection seat cavity (51) with a cavity opening facing forward, and a battery electrical connection wire accommodation recess (52) is formed on the wall of the opposite side of the pair of battery electrical connection seats (5), and a pair of battery electrical connection pole columns (53) are fixed on the cavity bottom wall of the battery electrical connection seat cavity (51), the pair of battery electrical connection pole columns (53) penetrating through the cavity bottom wall and protruding into the battery box cavities (41) of the pair of battery boxes (4), one end of the battery electrical connection wire is electrically connected to the pair of battery electrical connection pole columns (53) in the battery electrical connection seat cavity (51), and the other end of the battery electrical connection wire is led out of the battery electrical connection seat cavity (51) through the battery electrical connection wire accommodation recess (52) and is electrically connected to the electrical control box (6), when the pair of batteries (3) are inserted into the battery box cavities (41), the battery positive and negative pole insertion holes (31) of the pair of batteries (3) facing the one end of the pair of battery electrical connection pole columns (53) are inserted into the pair of battery electrical connection pole columns (53) to automatically establish an electrical connection relationship, and when the pair of batteries (3) are pulled out of the battery box cavities (41), the battery positive and negative pole insertion holes (31) of the pair of batteries (3) are separated from the pair of battery electrical connection pole columns (53) to automatically break the electrical connection relationship.

3. The battery electrical connection structure of the electrically powered wheelchair according to claim 1, characterized by: A set of battery electrical connection seat fixing screw columns (511) are formed in the battery electrical connection seat cavity (51), a motor connection seat fixing plate (1211) is formed on the motor (121) and corresponds to the front end of the battery box (4), a transition connection plate fixing plate (42) is fixed on the front end of the pair of battery boxes (4) and corresponds to the front of the battery electrical connection seat (5), and a motor connection seat transition connection plate (7) is fixed on the side of the motor connection seat fixing plate (1211) facing the transition connection plate fixing plate (42), the upper end of the motor connection seat transition connection plate (7) is connected to the transition connection plate fixing plate (42), and the middle part of the transition connection plate fixing plate (42) is fixed to the set of battery electrical connection seat fixing screw columns (511), and the motor connection seat transition connection plate (7) is fixed to the motor connection seat fixing plate (1211) by a set of motor connection seat transition connection plate screws (73).

4. The battery electrical connection structure of the electrically powered wheelchair according to claim 3, characterized by: A pair of transversely parallel and protruding from the surface of the motor connection seat transition connecting plate (7) dovetail flanges (71) are formed on the middle rear side of the motor connection seat transition connecting plate (7) in the height direction, while a pair of transversely parallel and corresponding to the dovetail flanges (71) and recessed from the surface of the transition connecting plate fixing plate (42) dovetail flange insertion slots (421) are formed on the middle front side of the transition connecting plate fixing plate (42) in the height direction, and the pair of dovetail flanges (71) and the pair of dovetail flange insertion slots (421) are inserted and fitted.

5. The battery electrical connection structure of the electrically powered wheelchair according to claim 4, characterized by: The cross-sectional shape of the pair of dovetail flanges (71) is dovetail-shaped, and the cross-sectional shape of the pair of dovetail flange insertion slots (421) is also dovetail-shaped.

6. The battery electrical connection structure of the electrically powered wheelchair according to claim 4, characterized by: A pin shaft (72) is provided at the central position of the upper end of the motor connection seat transition connecting plate (7), and a pin shaft through hole (422) is provided at the central position of the upper end of the transition connecting plate fixing plate (42) and corresponding to the position of the pin shaft (72), the rear end of the pin shaft (72) extends to the rear side of the transition connecting plate fixing plate (42) through the pin shaft through hole (422) and is limited by a pin shaft limiting member (721).

7. The battery electrical connection structure of the electrically powered wheelchair according to claim 3, characterized by: A set of transition connecting plate fixing plate screws (423) are provided in the middle of the transition connecting plate fixing plate (42) in the height direction, which are fixed with the set of battery electrical connection seat fixing screw columns (511).

8. The battery electrical connection structure of the electrically powered wheelchair according to claim 1, characterized by: A fender fixing bracket (43) is fixed on the edge of the outward side of the upper front end of the battery box (4), a pair of bracket screw holes (431) are formed on the fender fixing bracket (43), and the fender (8) is fixed with the fender fixing bracket (43) by a pair of screws corresponding to the pair of bracket screw holes (431).

9. The battery electrical connection structure of the electrically powered wheelchair vehicle according to claim 4, characterized by: A dovetail flange insertion limit position baffle (424) for blocking the end face of the dovetail flange (71) is formed on the transition connecting plate fixing plate (42) and corresponding to the slot opening position of the inward side of one of the pair of dovetail flange insertion slots (421).

10. The battery electrical connection structure of the electrically powered wheelchair according to claim 2, characterized by: The motor (1211) is electrically connected with the electrical control box (6).

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