Electric wheelchair

Abstract

The utility model relates to the technical field of wheelchairs, and discloses an electric wheelchair which comprises a vehicle body, driving wheels, driven wheels and a battery, the vehicle body comprises vehicle frames arranged on the left side and the right side, a hinge structure used for connecting the vehicle frames on the left side and the right side and a cushion arranged at the top of the hinge structure, and each vehicle frame comprises a supporting rod, a rear support and a connecting support; the supporting rod comprises a driven wheel supporting section, a cushion supporting section and a backrest supporting section, the two ends of the connecting support are connected with the bottom of the driven wheel supporting section and the bottom of the rear support respectively, the top of the rear support is fixedly connected with the cushion supporting section, the driving wheel is arranged on the connecting support or the rear support, and the driven wheel is arranged at the bottom of the driven wheel supporting section. The batteries are used for supplying power to the driving wheels, the two batteries are arranged on the rear supports on the left side and the right side respectively, then the capacity of the power supply module of the electric wheelchair is increased, the endurance mileage of the electric wheelchair is increased, and then the use experience of a user is improved.

Description

Technical Field

[0001] This application belongs to the technical field of wheelchairs, and particularly relates to an electric wheelchair. Background Art

[0002] An electric wheelchair is an auxiliary mobile device designed for people with limited mobility. It is powered by an electric drive system, enabling users to move freely indoors and outdoors. It includes a vehicle body, drive wheels provided on the vehicle body, driven wheels provided on the vehicle body, and a battery. The battery is used to supply electrical energy to the drive wheels so that the drive wheels drive the vehicle body forward or backward. Therefore, the capacity of the battery directly affects the cruising range of the electric wheelchair.

[0003] Generally, the larger the capacity of the battery, the larger its volume. To increase the cruising range of the electric wheelchair, the battery is usually placed at the bottom of the seat cushion on the vehicle body so that the electric wheelchair can be equipped with a battery with a larger capacity. However, for a foldable and collapsible electric wheelchair, if the battery is placed at the bottom of the seat cushion, it will affect the folding of the electric wheelchair. Therefore, the installation position of the battery needs to be transferred to the side of the vehicle body, and at the same time, the volume of the battery needs to be reduced, which thus affects the cruising range of the electric wheelchair. Utility Model Content

[0004] This application provides an electric wheelchair to increase the cruising range of the electric wheelchair.

[0005] The technical solution adopted in this application is as follows:

[0006] An electric wheelchair, comprising:

[0007] A vehicle body, which includes frames placed on the left and right sides, a hinge structure for connecting the frames on the left and right sides, and a seat cushion provided on the top of the hinge structure. The frame includes a support rod, a rear bracket, and a connecting bracket. The support rod includes a driven wheel support section, a seat cushion support section, and a backrest support section. The two ends of the connecting bracket are respectively connected to the bottom of the driven wheel support section and the bottom of the rear bracket. The top of the rear bracket is fixedly connected to the seat cushion support section;

[0008] Drive wheels, which are provided on the connecting bracket or the rear bracket;

[0009] Driven wheels, which are provided at the bottom of the driven wheel support section;

[0010] A battery, which is used to supply power to the drive wheels. There are two batteries, which are respectively provided on the rear brackets on the left and right sides.

[0011] By adopting the above technical solution, since there are two batteries which are respectively arranged on the rear brackets on the left and right sides, on the one hand, it ensures that the electric wheelchair can be folded and stored, and on the other hand, it increases the capacity of the power supply module of the electric wheelchair to increase the cruising range of the electric wheelchair, thereby improving the user experience; at the same time, it can also achieve the effect of facilitating the disassembly and assembly of the battery to improve the disassembly and assembly efficiency of the battery; and it can also achieve the effect of facilitating the charging of the battery to further improve the user experience.

[0012] Optionally, the rear bracket is provided with a fixed shell, and the battery is detachably connected to the fixed shell.

[0013] By adopting the above technical solution, since the battery is detachably connected to the fixed shell, the difficulty of disassembling and assembling the battery is reduced, so that the user can remove the battery from the vehicle body to charge the battery, thus achieving the effect of facilitating the charging of the battery; and multiple batteries can also be configured for the electric wheelchair for the user to replace the discharged battery at any time, so as to increase the cruising range of the electric wheelchair in a short time, thereby further improving the user experience.

[0014] Optionally, the driving wheel includes a wheel body arranged on the rear bracket and a motor arranged in the fixed shell for driving the wheel body to rotate, and the motor is electrically connected to the battery.

[0015] By adopting the above technical solution, since the motor is located in the fixed shell, the fixed shell can block the motor, thereby increasing the aesthetics of the electric wheelchair. At the same time, the fixed shell can also protect the motor to avoid the occurrence of possible bumps of the motor, thus ensuring the service life of the electric wheelchair and further improving the user experience. In addition, it can also make the circuit of the motor located in the fixed shell to avoid the situation that the circuit of the motor is exposed and easily damaged, so as to reduce the failure rate of the electric wheelchair and further ensure the service life of the electric wheelchair.

[0016] Optionally, a controller electrically connected to the motor is arranged in the fixed shell, and the controller is electrically connected to the battery.

[0017] By adopting the above technical solution, since both the controller and the motor are located in the fixed shell, the integration of the motor and the controller into the fixed shell is realized, so that the circuits connecting the controller and the battery and the circuits connecting the controller and the motor can be hidden in the fixed shell, avoiding the occurrence of messy circuits and the situation that the circuits are easily damaged and aged, thereby improving the service life of the electric wheelchair and the user experience.

[0018] Optionally, the fixed shell is provided with a first conductive part electrically connected to the controller, the battery is provided with a second conductive part that can be electrically conductive with the first conductive part, the fixed shell is provided with a positioning part, and the battery is provided with a guide part, and the positioning part cooperates with the guide part to align the first conductive part and the second conductive part.

[0019] By adopting the above technical solution, when installing the battery, the guide part on the battery cooperates with the positioning part on the fixed shell, and then the second conductive part is aligned with the first conductive part under the cooperation of the guide part and the positioning part, so that the second conductive part and the first conductive part can be in contact with each other and electrically conductive, thereby reducing the difficulty of installing the battery and increasing the connection stability between the second conductive part and the first conductive part to ensure the electrical connection stability between the second conductive part and the first conductive part, so as to avoid the situation where the electric wheelchair cannot move due to poor contact between the second conductive part and the first conductive part, thereby ensuring the working stability of the electric wheelchair.

[0020] Optionally, the rear bracket is provided with a fixed shell, the fixed shell has a matching part, and the battery is provided with a locking part, and the locking part can move relative to the battery so that the locking part has a locking position that cooperates with the matching part stopper and an unlocking position that avoids the matching part.

[0021] By adopting the above technical solution, after the battery is installed on the fixed shell, the locking part is in the locking position, that is, the locking part cooperates with the matching part stopper to prevent the battery from moving relative to the fixed shell, thereby increasing the connection stability between the battery and the fixed shell to ensure the electrical conduction stability between the second conductive part and the first conductive part, and further ensuring the working stability of the electric wheelchair. When removing the battery, the locking part is pressed toward the unlocking position, and then the locking part moves toward the unlocking position under the action of the pressing force, so that the locking part and the matching part avoid each other, and then the battery can be removed, so as to achieve the effect of facilitating the removal of the battery.

[0022] Optionally, the battery is provided with a reset member acting on the locking portion, and when the locking portion is in the unlocking position, the reset member is deformed and applies a force on the locking portion toward the locking position.

[0023] By adopting the above technical solution, when the locking part is in the unlocked position, the reset member is deformed and applies a force toward the locked position to the locking part, so that the locking part can automatically move to the locked position under the action of the reset member, so as to achieve the effect of automatically cooperating with the stopper of the matching part; at the same time, when the locking part is driven to the unlocked position, it is necessary to overcome the elastic force of the reset member to increase the force required to unlock the battery, thereby increasing the stability of the stopper cooperation between the locking part and the matching part, so as to further increase the connection stability between the battery and the fixed shell.

[0024] Optionally, the battery is provided with a transmission part exposed outside the fixed housing. The transmission part acts on the locking part and can move relative to the battery to drive the locking part to move between the locking position and the unlocking position.

[0025] By adopting the above technical solution, when disassembling the battery, a force is applied to the transmission part to make the transmission part move relative to the battery, so that the transmission part drives the locking part to move from the locking position to the unlocking position, so as to unlock the battery, avoiding the situation that the user needs to directly apply a force to the locking part, and thus achieving the effect of facilitating the unlocking of the battery.

[0026] Optionally, the transmission part has a hinged end hinged to the battery and a free end that swings around the hinged end. The locking part has a transmission groove, and the free end has a transmission rib extending into the transmission groove. When the free end is pressed, the transmission rib and the transmission groove move relative to each other, so that the locking part moves from the locking position to the unlocking position.

[0027] By adopting the above technical solution, when the free end is pressed, the transmission rib and the transmission groove move relative to each other, so that the locking part moves from the locking position to the unlocking position. Then, when disassembling the battery, the user only needs to press the thumb on the side of the battery opposite to the transmission part, and other fingers press the free end of the transmission part, so that the locking part moves from the locking position to the unlocking position to unlock the battery. During this process, the user can complete the operation with one hand, further reducing the difficulty of unlocking the battery, and thus further improving the user experience.

[0028] Optionally, the rear bracket is provided with a fixed housing, and the fixed housing has an installation position with an opening inclined upward. The battery is disassembled and assembled in the fixed housing through the opening.

[0029] By adopting the above technical solution, since the fixed housing has an installation position with an opening inclined upward and the battery is disassembled and assembled in the fixed housing through the opening, after the battery is installed in the installation position, the battery can be pressed against the installation position under the action of the component force of its own gravity to increase the stability of the battery. At the same time, when disassembling the battery, only need to hold the opposite sides of the battery and apply an upwardly inclined force to the battery, thus further reducing the difficulty of disassembling the battery and further improving the user experience.

[0030] Optionally, the fixed housing includes a first housing and a second housing. The first housing and the second housing jointly form an accommodation cavity, and at least part of the rear bracket is located in the accommodation cavity.

[0031] By adopting the above technical solution, since at least part of the rear bracket is located in the accommodation cavity, the fixing shell can then block the rear bracket, thereby increasing the aesthetic appearance of the electric wheelchair and improving the user experience. At the same time, it can also increase the connection stability between the fixing shell and the rear bracket to ensure the stability of the battery.

[0032] Due to the adoption of the above technical solution, the beneficial effects achieved by this application are as follows:

[0033] 1. The electric wheelchair in this application includes a vehicle body, drive wheels, driven wheels, and a battery. The vehicle body includes frames on the left and right sides, a hinge structure for connecting the frames on the left and right sides, and a seat cushion provided at the top of the hinge structure. The frame includes a support rod, a rear bracket, and a connecting bracket. The support rod includes a driven wheel support section, a seat cushion support section, and a backrest support section. The two ends of the connecting bracket are respectively connected to the bottom of the driven wheel support section and the bottom of the rear bracket. The top of the rear bracket is fixedly connected to the seat cushion support section. The drive wheels are provided on the connecting bracket or the rear bracket, the driven wheels are provided at the bottom of the driven wheel support section, and the battery is used to supply power to the drive wheels. There are two batteries, which are respectively provided on the rear brackets on the left and right sides. On the one hand, it ensures that the electric wheelchair can be folded and stored. On the other hand, it increases the capacity of the power supply module of the electric wheelchair to increase the cruising range of the electric wheelchair, thereby improving the user experience; at the same time, it can also achieve the effect of facilitating the disassembly and assembly of the battery to improve the disassembly and assembly efficiency of the battery; and it can also achieve the effect of facilitating the charging of the battery to further improve the user experience.

[0034] 2. The rear bracket in this application is provided with a fixing shell, and the battery is detachably connected to the fixing shell, thereby reducing the difficulty of disassembling and assembling the battery, enabling the user to remove the battery from the vehicle body to charge the battery, and thus achieving the effect of facilitating the charging of the battery; and multiple batteries can also be configured for the electric wheelchair for the user to replace the depleted battery at any time, so as to increase the cruising range of the electric wheelchair in a short time, and further improve the user experience.

[0035] 3. The drive wheel in this application includes a wheel body provided on the rear bracket and a motor provided in the fixing shell for driving the wheel body to rotate. The motor is electrically connected to the battery, and then the fixing shell can block the motor, thereby increasing the aesthetic appearance of the electric wheelchair. At the same time, the fixing shell can also protect the motor to avoid the occurrence of possible bumps to ensure the service life of the electric wheelchair, and further improve the user experience. In addition, it can also make the circuit of the motor located in the fixing shell to avoid the situation that the circuit of the motor is exposed and easily damaged, so as to reduce the failure rate of the electric wheelchair and further ensure the service life of the electric wheelchair. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The accompanying drawings described herein are used to provide a further understanding of the present application and form a part of the present application. The schematic embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation of the present application. In the drawings:

[0037] Figure 1 It is a schematic structural diagram of the electric wheelchair under an embodiment of the present application;

[0038] Figure 2 It is a schematic structural diagram of the electric wheelchair from another perspective under an embodiment of the present application;

[0039] Figure 3 It is a schematic structural diagram of the vehicle frame under an embodiment of the present application;

[0040] Figure 4 It is a schematic structural diagram of the connection between the battery and the vehicle frame under an embodiment of the present application;

[0041] Figure 5 It is a schematic structural diagram of the connection between the fixed shell and the vehicle frame under an embodiment of the present application. The first shell is omitted in this drawing;

[0042] Figure 6 It is a schematic structural diagram of the fixed shell under an embodiment of the present application;

[0043] Figure 7 It is a schematic structural diagram of the battery under an embodiment of the present application;

[0044] Figure 8 It is a schematic structural diagram of the battery from another perspective under an embodiment of the present application;

[0045] Figure 9 It is a schematic structural diagram of the bottom bracket under an embodiment of the present application.

[0046] Reference numerals:

[0047] 1, vehicle body; 11, vehicle frame; 111, support rod; 112, rear bracket; 113, connecting bracket; 114, driven wheel support section; 115, seat cushion support section; 116, backrest support section; 117, fixing piece; 12, hinge structure; 13, seat cushion;

[0048] 2, drive wheel; 21, wheel body; 22, motor;

[0049] 3, driven wheel;

[0050] 4. Battery; 41. Second conductive part; 42. Guide part; 43. L-shaped rib; 44. Base; 441. Locking part; 442. Reset part; 443. Stopping rib; 444. Transmission part; 445. Guide surface; 446. Transmission groove; 447. Transmission rib

[0051] 5. Fixed shell; 51. First conductive part; 52. Positioning part; 53. L-shaped limiting rib; 54. Matching part; 55. First shell; 56. Second shell

[0052] 6. Controller Detailed implementation mode

[0053] In order to more clearly illustrate the overall concept of this application, the following will be described in detail by way of examples in conjunction with the drawings of the specification.

[0054] In the following description, many specific details are set forth in order to provide a thorough understanding of this application. However, this application may be implemented in other ways different from those described herein. Therefore, the scope of protection of this application is not limited by the specific embodiments disclosed below. It should be noted that, without conflict, the embodiments of this application and the features in each embodiment may be combined with each other.

[0055] In addition, in the description of this application, it should be understood that the orientation or positional relationships indicated by the terms "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to this application.

[0056] In this application, unless otherwise clearly defined and limited, the terms "installation", "connection", "connection", "fixation", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection, an electrical connection, or a communication connection; it can be directly connected, or indirectly connected through an intermediate medium, and can be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0057] In this application, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. In the description of this specification, the description referring to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of this application. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0058] Referring to Figures 1 to 9 , an electric wheelchair is disclosed, which includes a vehicle body 1, drive wheels 2, driven wheels 3, and a battery 4; wherein the vehicle body 1 includes frame members 11 disposed on the left and right sides, a hinge structure 12 for connecting the frame members 11 on the left and right sides, and a seat cushion 13 disposed on the top of the hinge structure 12. The frame member 11 includes a support rod 111, a rear bracket 112, and a connecting bracket 113. The support rod 111 includes a driven wheel support section 114, a seat cushion support section 115, and a backrest support section 116. The two ends of the connecting bracket 113 are respectively connected to the bottom of the driven wheel support section 114 and the bottom of the rear bracket 112. The top of the rear bracket 112 is fixedly connected to the seat cushion support section 115; the drive wheels 2 are disposed on the connecting bracket 113 or the rear bracket 112; the driven wheels 3 are disposed at the bottom of the driven wheel support section 114; the battery 4 is used to supply power to the drive wheels 2, and there are two batteries 4 which are respectively disposed on the rear brackets 112 on the left and right sides.

[0059] It can be understood that the batteries 4 disposed on the brackets 112 on the left and right sides constitute the power supply module of the electric wheelchair.

[0060] Since there are two batteries 4 which are respectively disposed on the rear brackets 112 on the left and right sides, on the one hand, it ensures that the electric wheelchair can be folded and stored, and on the other hand, it increases the capacity of the power supply module of the electric wheelchair to increase the cruising range of the electric wheelchair, thereby improving the user experience; at the same time, it can also achieve the effect of facilitating the disassembly and assembly of the battery 4 to improve the disassembly and assembly efficiency of the battery 4; and it can also achieve the effect of facilitating the charging of the battery 4 to further improve the user experience.

[0061] It should be noted that the statement that there are two batteries 4 in this application means that there are two groups of batteries 4, and each group of batteries can have only one battery cell, or each group of batteries can be provided with multiple battery cells.

[0062] This application does not specifically limit the connection method between the battery 4 and the rear bracket 112, and any of the following implementation manners can be adopted:

[0063] In the first implementation manner, in this implementation manner, the battery 4 is fixedly connected to the rear bracket 112 to increase the stability of the battery 4.

[0064] It can be understood that when the battery 4 is being charged, the battery 4 cannot be removed from the rear bracket 112, and the electric wheelchair needs to be driven to a position where it can be charged.

[0065] In the second implementation manner, in this implementation manner, referring to Figure 1 、 Figure 2 、 Figure 4 and Figure 5 , the rear bracket 112 is provided with a fixing shell 5, and the battery 4 is detachably connected to the fixing shell 5.

[0066] That is to say, the battery 4 is detachably connected to the rear bracket 112 through the fixing shell 5, thereby reducing the difficulty of disassembling and assembling the battery 4, so that the user can remove the battery 4 from the vehicle body 1 to charge the battery 4, thus achieving the effect of facilitating the charging of the battery 4; and, multiple batteries 4 can also be configured for the electric wheelchair for the user to replace the depleted battery 4 at any time, so as to increase the cruising range of the electric wheelchair in a relatively short time, thereby further improving the user experience.

[0067] This application does not specifically limit the structure of the drive wheel 2. Preferably, referring to Figure 1 、 Figure 2 and Figure 5 , the drive wheel 2 includes a wheel body 21 provided on the rear bracket 112 and a motor 22 provided in the fixing shell 5 for driving the rotation of the wheel body 21, and the motor 22 is electrically connected to the battery 4.

[0068] Since the motor 22 is located in the fixing shell 5, the fixing shell 5 can shield the motor 22, thereby increasing the aesthetics of the electric wheelchair. At the same time, the fixing shell 5 can also protect the motor 22 to avoid possible bumping of the motor 22, thus ensuring the service life of the electric wheelchair and further improving the user experience. In addition, it can also make the circuit of the motor 22 located in the fixing shell 5 to avoid the situation that the circuit of the motor 22 is exposed and easily damaged, so as to reduce the failure rate of the electric wheelchair and further ensure the service life of the electric wheelchair.

[0069] Preferably, referring to Figure 3 , a fixing piece 117 is provided at the bottom of the end of the connecting bracket 113 close to the rear bracket 112, and the motor 22 is fixedly connected to the fixing piece 117 to increase the stability of the motor 22, thereby ensuring the driving effect of the motor 22 on the wheel body 21.

[0070] Further, referring to Figure 5 , a controller 6 electrically connected to the motor 22 is provided in the fixed housing 5, and the controller 6 is electrically connected to the battery 4. Subsequently, the motor 22 and the controller 6 are integrated into the fixed housing 5, so that the lines connecting the controller 6 and the battery 4 and the lines connecting the controller 6 and the motor 22 can be hidden in the fixed housing 5 to avoid the situation of messy lines, and at the same time avoid the situation that the lines are easily damaged and aged, thereby improving the service life of the electric wheelchair and the user experience.

[0071] Further, referring to Figure 6 , Figure 7 and Figure 8 , the fixed housing 5 is provided with a first conductive part 51 electrically connected to the controller 6, the battery 4 is provided with a second conductive part 41 that can be electrically conducted with the first conductive part 51, the fixed housing 5 is provided with a positioning part 52, and the battery 4 is provided with a guiding part 42. The positioning part 52 and the guiding part 42 cooperate to align the first conductive part 51 and the second conductive part 41.

[0072] When installing the battery 4, the guiding part 42 on the battery 4 cooperates with the positioning part 52 on the fixed housing 5. Subsequently, the second conductive part 41 is aligned with the first conductive part 51 under the cooperation of the guiding part 42 and the positioning part 52, so that the second conductive part 41 and the first conductive part 51 can come into contact with each other and be electrically conducted, thereby reducing the installation difficulty of the battery 4 and at the same time increasing the connection stability between the second conductive part 41 and the first conductive part 51 to ensure the electrical connection stability between the second conductive part 41 and the first conductive part 51, and to avoid the situation that the electric wheelchair cannot move due to poor contact between the second conductive part 41 and the first conductive part 51, thereby ensuring the working stability of the electric wheelchair.

[0073] The present application does not specifically limit the structures of the first conductive part 51 and the second conductive part 41. Preferably, the first conductive part 51 is a coupler socket, and the second conductive part 41 is a coupler plug. That is to say, after the battery 4 is installed in the fixed housing 5, the coupler socket and the coupler plug are plugged and matched to achieve electrical conduction between the two. In other embodiments, the first conductive part 51 and the second conductive part 41 can also both be block-shaped structures or sheet-shaped structures with conductive properties.

[0074] The present application does not specifically limit the structures of the positioning part 52 and the guiding part 42. Preferably, referring to Figure 6 and Figure 7, the positioning portion 52 is a strip-shaped structure provided on the fixed shell 5, and the guide portion 42 is a groove-shaped structure formed by the side depression of the battery 4. After the battery 4 is installed in the fixed shell 5, the positioning portion 52 is located inside the guide portion 42, so as to realize the positioning of the battery 4 and limit the battery 4 to prevent the battery 4 from escaping from the side of the fixed shell 5. In other embodiments, the guide portion 42 is a strip-shaped structure provided on the side of the battery 4, and the positioning portion 52 is a groove-shaped structure provided on the fixed shell 5, so that the guide portion 42 and the positioning portion 52 are plugged and matched to position the battery 4.

[0075] Better, refer to Figure 6 and Figure 8 The fixed shell 5 is provided with an L-shaped limiting rib 53, and the battery 4 is provided with an L-shaped rib 43 which is plugged into and matched with the L-shaped limiting rib 53, so that the cooperation between the L-shaped rib 43 and the L-shaped limiting rib 53 limits the battery 4 to prevent the battery 4 from detaching from the side of the fixed shell 5, thereby further increasing the connection stability between the battery 4 and the fixed shell 5.

[0076] In other embodiments, the driving wheel 2 may also be a structure in which the motor 22 is integrated into the wheel body 21 , that is, there is no need to configure an additional motor 22 for the driving wheel 2 .

[0077] In a preferred embodiment, referring to Figure 6 , Figure 7 and Figure 8 The rear bracket 112 is provided with a fixed shell 5, the fixed shell 5 has a matching portion 54, and the battery 4 is provided with a locking portion 441. The locking portion 441 can move relative to the battery 4 so that the locking portion 441 has a locking position that cooperates with the matching portion 54 stopper and an unlocking position that avoids the matching portion 54.

[0078] After the battery 4 is installed on the fixed shell 5, the locking portion 441 is in the locked position, that is, the locking portion 441 and the matching portion 54 are matched with each other to prevent the battery 4 from moving relative to the fixed shell 5, thereby increasing the connection stability between the battery 4 and the fixed shell 5, ensuring the electrical conduction stability between the second conductive portion 41 and the first conductive portion 51, and further ensuring the working stability of the electric wheelchair. When removing the battery 4, the locking portion 441 is pressed toward the unlocking position, and then the locking portion 441 moves toward the unlocking position under the action of the pressing force, so that the locking portion 441 and the matching portion 54 avoid each other, and then the battery 4 can be removed, so as to achieve the effect of facilitating the removal of the battery 4.

[0079] In a preferred embodiment, referring to Figure 9, the battery 4 is provided with a reset member 442 acting on the locking portion 441. When the locking portion 441 is in the unlocked position, the reset member 442 is deformed and applies a force towards the locking position to the locking portion 441, so that the locking portion 441 can automatically move to the locking position under the action of the reset member 442, so as to achieve the effect that the locking portion 441 automatically engages with the engaging portion 54 in a blocking manner; at the same time, when the locking portion 441 is driven to the unlocked position, the elastic force of the reset member 442 needs to be overcome, so as to increase the force required to unlock the battery 4, thereby increasing the stability of the blocking fit between the locking portion 441 and the engaging portion 54, and further increasing the connection stability between the battery 4 and the fixed housing 5.

[0080] Preferably, referring to Figure 7 , Figure 8 and Figure 9 , a bottom tray 44 is provided at the bottom of the battery 4, the reset member 442 is located inside the bottom tray 44, the locking portion 441 is slidably connected to the bottom tray 44, and the locking portion 441 has a locking end that engages with the engaging portion 54 in a blocking manner. When the locking portion 441 is in the unlocked position, the locking end is hidden inside the bottom tray 44. When the locking portion 441 is in the locking position, the locking end is located outside the bottom tray 44 to be able to engage with the engaging portion 54 in a blocking manner. The bottom tray 44 is provided with a stop rib 443 on the side of the locking portion 441 away from the reset member 442, so that the stop rib 443 limits the locking portion 441 to prevent the locking portion 441 from separating from the bottom tray 44 under the action of the reset member 442, thereby increasing the connection stability between the locking portion 441 and the bottom tray 44.

[0081] This application does not specifically limit the structures of the locking portion 441 and the engaging portion 54. Preferably, the locking portion 441 is a frame structure composed of a plurality of ribs to reduce the weight of the battery 4; the engaging portion 54 is a groove-shaped structure for accommodating the locking end. That is to say, the locking end engages with the groove wall of the engaging portion 54 in a blocking manner. In other embodiments, the locking portion 441 can also be a block structure, and the engaging portion 54 can be a rib structure. As long as the blocking fit between the locking portion 441 and the engaging portion 54 can be achieved, the locking portion 441 and the engaging portion 54 can be of any structure.

[0082] Furthermore, referring to Figure 9 , the locking end of the locking portion 441 has a guiding surface 445, so that the locking portion 441 can move from the locking position to the unlocked position under the action of the conductive surface. After the battery 4 is installed in place, the locking portion 441 can move from the unlocked position to the locked position under the action of the reset member 442 to engage with the engaging portion 54 in a blocking manner, so as to avoid the situation that the user needs to operate the locking portion 441 when installing the battery 4, thereby achieving the effect of facilitating the installation of the battery 4.

[0083] This application does not specifically limit the structure of the reset member 442. Preferably, referring to Figure 9 , the reset member 442 is a spring to ensure the elastic driving effect of the reset member 442 on the locking portion 441. In other embodiments, the reset member 442 can also be an elastic sheet or an elastic column or other elastic structures.

[0084] Furthermore, referring to Figure 8 and Figure 9 , the battery 4 is provided with a transmission portion 444 exposed outside the fixed case 5. The transmission portion 444 acts on the locking portion 441 and can move relative to the battery 4 to drive the locking portion 441 to move between the locking position and the unlocking position.

[0085] When disassembling the battery 4, a force is applied to the transmission portion 444 to make the transmission portion 444 move relative to the battery 4, so that the transmission portion 444 drives the locking portion 441 to move from the locking position to the unlocking position, so as to unlock the battery 4, avoiding the situation where the user directly applies a force to the locking portion 441, and thus achieving the effect of facilitating the unlocking of the battery 4.

[0086] Preferably, the fixed case 5 is provided with an avoidance notch corresponding to the transmission portion 444 so that the transmission portion 444 can be exposed outside the fixed case 5.

[0087] This application does not specifically limit the way in which the transmission portion 444 drives the locking portion 441 to move. Preferably, referring to Figure 9 , the transmission portion 444 has a hinged end hinged to the battery 4 and a free end that swings around the hinged end. The locking portion 441 has a transmission groove 446, and the free end has a transmission rib 447 extending into the transmission groove 446. When the free end is pressed, the transmission rib 447 and the transmission groove 446 move relative to each other, so that the locking portion 441 moves from the self-locking position to the unlocking position. Then, when disassembling the battery 4, the user only needs to press the thumb on the side of the battery 4 opposite to the transmission portion 444, and press the free end of the transmission portion 444 with other fingers, so that the locking portion 441 moves from the locking position to the unlocking position, so as to unlock the battery 4. In this process, the user can complete the operation with one hand, further reducing the unlocking difficulty of the battery 4, and thus further improving the user experience.

[0088] Specifically, the transmission portion 444 is hinged to the bottom tray 44, and the bottom tray 44 is provided with an avoidance groove corresponding to the transmission rib 447. The transmission groove 446 is inclined upward from bottom to top towards the locking position of the locking portion 441, so that when an upward pressing force is applied to the transmission portion 444, the locking portion 441 can move to the unlocking position under the cooperation of the transmission rib 447 and the transmission groove 446.

[0089] In other implementation examples, the transmission part 444 is a strip-shaped structure connected to the locking part 441, and the strip-shaped structure protrudes from the side surface of the battery 4. That is to say, when unlocking the locking part 441, only need to pull the transmission part 444 in a direction away from the battery 4.

[0090] In a preferred implementation manner, referring to Figure 1 , Figure 2 and Figure 4 , the rear bracket 112 is provided with a fixed shell 5. The fixed shell 5 has a mounting position with an opening inclined upward. The battery 4 is disassembled and assembled through the opening to the fixed shell 5. Then, after the battery 4 is installed in the mounting position, the battery 4 can be pressed against the mounting position under the action of the component force of its own gravity to increase the stability of the battery 4. At the same time, when disassembling the battery 4, only need to hold the opposite sides of the battery 4 and apply a force inclined upward to the battery 4, thereby further reducing the difficulty of disassembling the battery 4 to further improve the user experience.

[0091] This application does not make specific limitations on the structure of the fixed shell 5. Preferably, referring to Figure 4 and Figure 6 , the fixed shell 5 includes a first shell 55 and a second shell 56. The first shell 55 and the second shell 56 jointly form an accommodation cavity. At least part of the rear bracket 112 is located in the accommodation cavity. Then, the fixed shell 5 can shield the rear bracket 112 to increase the aesthetics of the electric wheelchair, thereby improving the user experience. At the same time, it can also increase the connection stability between the fixed shell 5 and the rear bracket 112 to ensure the stability of the battery 4.

[0092] In other embodiments, the fixed shell 5 can also be a shell-type structure provided on the side of the rear bracket 112.

[0093] In a preferred embodiment, referring to Figure 4 , the second shell 56 is provided inside the connecting bracket 113, and the mounting position is provided on the second shell 56. That is to say, the two batteries 4 are respectively located on one side where the two fixed shells 5 are close to each other, and the drive wheels 2 are located outside the fixed shells 5, so that the battery 4 and the drive wheels 2 are avoided from interfering with each other, thereby achieving the effect of facilitating the disassembly of the battery 4. At the same time, it can also avoid the situation that the rain splashed when the electric wheelchair travels on a rainy road surface pollutes the battery 4, and further ensure the cleanliness of the battery 4 to reduce the cleaning burden of the user, and further improve the user experience.

[0094] The present application does not specifically limit the structure of the rear bracket 112. Preferably, the rear bracket 112 includes a rod-shaped structure and a sheet-shaped structure fixedly connected to the rod-shaped structure, so as to avoid the situation that the fixed shell 5 easily rotates around the rear bracket 112, thereby increasing the connection stability between the fixed shell 5 and the rear bracket 112. At the same time, it can also increase the supporting effect of the rear bracket 112 on the cushion supporting section 115 to ensure the structural strength of the electric wheelchair. In other embodiments, the rear bracket 112 may also only include a rod-shaped structure or a sheet-shaped structure.

[0095] What is not described in this application can be realized by adopting or referring to the existing technology.

[0096] Each embodiment in this specification is described in a progressive manner. For the same or similar parts among the embodiments, reference can be made to each other. The key point of each embodiment is to illustrate the differences from other embodiments.

[0097] The above are only the embodiments of the present application and are not used to limit the present application. For those skilled in the art, various changes and modifications can be made to the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included within the scope of the claims of the present application.

Claims

1. An electric wheelchair, characterized in that: include: A vehicle body (1), comprising a vehicle frame (11) disposed on left and right sides, a hinge structure (12) for connecting the vehicle frames (11) on the left and right sides, and a seat cushion (13) disposed on the top of the hinge structure (12); the vehicle frame (11) comprises a support rod (111), a rear bracket (112) and a connecting bracket (113); the support rod (111) comprises a driven wheel support section (114), a seat cushion support section (115) and a backrest support section (116); two ends of the connecting bracket (113) are respectively connected to the bottom of the driven wheel support section (114) and the bottom of the rear bracket (112); the top of the rear bracket (112) is fixedly connected to the seat cushion support section (115); A driving wheel (2), which is arranged on the connecting bracket (113) or the rear bracket (112); A driven wheel (3), which is arranged at the bottom of the driven wheel supporting section (114); A battery (4) is used to supply power to the driving wheel (2); two batteries (4) are provided and are respectively arranged on the left and right sides of the rear bracket (112).

2. An electric wheelchair according to claim 1, characterized in that: The rear bracket (112) is provided with a fixing shell (5), and the battery (4) is detachably connected to the fixing shell (5).

3. An electric wheelchair according to claim 2, characterized in that: The driving wheel (2) comprises a wheel body (21) arranged on the rear bracket (112) and a motor (22) arranged in the fixed shell (5) for driving the wheel body (21) to rotate, wherein the motor (22) is electrically connected to the battery (4).

4. An electric wheelchair according to claim 3, characterized in that: A controller (6) electrically connected to the motor (22) is provided in the fixed shell (5), and the controller (6) is electrically connected to the battery (4).

5. An electric wheelchair according to claim 4, characterized in that: The fixed shell (5) is provided with a first conductive part (51) electrically connected to the controller (6), the battery (4) is provided with a second conductive part (41) capable of being electrically conductive with the first conductive part (51), the fixed shell (5) is provided with a positioning part (52), the battery (4) is provided with a guiding part (42), and the positioning part (52) cooperates with the guiding part (42) to align the first conductive part (51) and the second conductive part (41).

6. The electric wheelchair according to claim 1, characterized in that: The rear bracket (112) is provided with a fixed shell (5), the fixed shell (5) having a matching portion (54), the battery (4) being provided with a locking portion (441), the locking portion (441) being capable of relative movement with the battery (4), so that the locking portion (441) has a locking position matching with a stopper of the matching portion (54) and an unlocking position avoiding the matching portion (54).

7. An electric wheelchair according to claim 6, characterized in that: The battery (4) is provided with a reset member (442) acting on the locking portion (441); when the locking portion (441) is in the unlocking position, the reset member (442) is deformed and applies a force to the locking portion (441) towards the locking position.

8. The electric wheelchair according to claim 7, characterized in that: The battery (4) is provided with a transmission part (444) exposed to the outside of the fixed shell (5); the transmission part (444) acts on the locking part (441) and is capable of relative movement with the battery (4) to drive the locking part (441) to move between the locking position and the unlocking position.

9. The electric wheelchair according to claim 8, characterized in that: The transmission part (444) has a hinged end hinged to the battery (4) and a free end swinging around the hinged end, the locking part (441) has a transmission groove (446), and the free end has a transmission rib (447) extending into the transmission groove (446), and when the free end is pressed, the transmission rib (447) and the transmission groove (446) move relative to each other, so that the locking part (441) moves from the locked position to the unlocked position.

10. The electric wheelchair according to claim 1, characterized in that: The rear bracket (112) is provided with a fixing shell (5), the fixing shell (5) having a mounting position with an opening tilted upward, and the battery (4) is detachable from the fixing shell (5) via the opening.

11. The electric wheelchair according to claim 10, characterized in that: The fixed shell (5) comprises a first shell (55) and a second shell (56), wherein the first shell (55) and the second shell (56) together form a receiving cavity, and at least a portion of the rear bracket (112) is located in the receiving cavity.

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