Self-locking structure of battery box of electric wheelchair

Abstract

The utility model relates to an electric wheelchair battery box self-locking structure which comprises a fixing frame connected with a wheelchair frame and a battery box connected with the fixing frame, a supporting plate connected with the bottom face of the battery box in an abutting mode is arranged in the middle of the fixing frame, and a limiting block connected with one side of the supporting plate in the length direction in an abutting mode is arranged at the bottom of the battery box. A locking block which can abut against the plane of the supporting plate is arranged on the other side of the bottom of the battery box, a fixing block is arranged at the bottom of the battery box, and the locking block is connected to the end face of the fixing block and can move towards the supporting plate in a reciprocating mode. The utility model has the characteristics that the battery box can be quickly assembled and disassembled, the structure is simple and reliable, and the assembly and disassembly are convenient.

Description

Technical Field

[0001] The utility model relates to a self-locking structure of a battery box of an electric wheelchair, belonging to the technical field of electric wheelchairs. Background Art

[0002] With the increasing number of the elderly population in China and the increasing demand for diversified travel by special disabled groups, electric wheelchairs have gradually become an indispensable means of transportation in the market. Electric wheelchairs are mechanical devices that are equipped with electric drive devices based on traditional hand-cranked wheelchairs. Most electric wheelchairs are mainly composed of a wheelchair frame, drive motor, controller and battery. The battery is usually assembled into a battery box module to facilitate the assembly and fixing of the battery on the wheelchair frame.

[0003] A battery box and controller assembly device is disclosed in a Chinese patent application with publication number CN117791011A, including a plug-in bracket for fixed connection with a wheelchair bracket, and a battery box assembly slidably plugged into the plug-in bracket. A lower electric control box is fixedly installed at one end of the plug-in bracket, and a latch structure is provided on the electric control box. The battery box assembly inserted into the installation position is locked by the latch structure. The lower electric control box accommodates the electric control assembly of the wheelchair, and the lower electric control box is electrically connected to the battery box assembly through wiring terminals. The battery box assembly includes an outer shell and a battery rack accommodated in the outer shell.

[0004] The battery box is assembled on the frame, and the assembly structure needs to be simple and reliable. If the structure is complex and there are many assembly steps, the disassembly and packaging before transportation and the subsequent assembly will be troublesome and difficult to install. At the same time, after the battery box is fixed on the frame, the battery box needs to be disassembled and assembled for replacement and maintenance. The complex assembly structure will affect the user experience. Utility Model Content

[0005] The utility model aims to provide a self-locking structure for a battery box of an electric wheelchair, which solves the problems of complex structure and great difficulty in assembly and disassembly in the prior art.

[0006] The above technical objectives of the utility model are mainly solved by the following technical solutions: a self-locking structure of a battery box for an electric wheelchair, comprising a fixing frame connected to a wheelchair frame and a battery box connected to the fixing frame, a support plate abutting against the bottom surface of the battery box is provided in the middle of the fixing frame, a limit block abutting against one side of the support plate in the length direction is provided at the bottom of the battery box, a locking block abutting against the plane of the support plate is provided at the other side of the bottom of the battery box, a fixing block is provided at the bottom of the battery box, the locking block is connected to the end surface of the fixing block and can reciprocate toward the support plate; the above battery box is connected to the fixing frame, and the bottom of the battery box is provided with a limit block abutting against one side of the support plate in the length direction, and the bottom of the battery box is provided with a limit block abutting against the plane of the support plate. The surface contacts the plane of the support plate to support the battery box, and one side of the bottom of the battery box abuts against the limit block, so that the limit block can limit one side of the battery box, and the other side of the battery box is limited by the fixed block, thereby realizing two-way limitation of the battery box, and the locking block can abut against the plane of the support plate, thereby realizing limitation in the thickness direction of the battery box, and then realizing locking of the battery box on the fixed frame, and the locking block is connected to the end face of the fixed block and can move back and forth toward the support plate, so that after the locking block leaves the support plate, the battery box can be disassembled along the thickness direction, effectively realizing the rapid disassembly and assembly of the battery box, the structure is simple and reliable, and it is easy to disassemble and assemble.

[0007] Preferably, a strip groove is provided in the middle of the locking block and is arranged along the moving direction of the locking block, and limiting parts are provided on both sides of the fixed block and are arranged parallel to the strip groove, and a bolt is provided on the bottom surface of the fixed block and passes through the strip groove and is tightened with the fixed block thread; the above-mentioned strip groove and bolt cooperate to limit the locking block between the two limiting parts, so that the locking block can move on the fixed block along the strip groove, thereby realizing the positioning of the moving direction of the locking block and maintaining the stability of the locking block when moving, thereby avoiding displacement of the locking block when moving.

[0008] Preferably, a fixing plate is provided at the end of the battery box corresponding to the adjacent side of the fixing block, and a convex column penetrating the fixing plate is provided on the side of the locking block facing the fixing plate, and the end of the convex column passes through the fixing plate and is provided with a pull ring, and a telescopic spring sleeved on the convex column is provided between the locking block and the fixing plate; the above-mentioned fixing plate can support the convex column, and the pull ring can pull the convex column, so that the convex column drives the locking block to move, so as to unlock the battery box, and the setting of the telescopic spring can keep the locking block in continuous contact with the support plate, thereby realizing continuous locking of the battery box, and the lock can be instantly released by pulling the pull ring, and the operation is simple, convenient and efficient.

[0009] Preferably, a side of the locking block that contacts the support plate is provided with a convex portion that protrudes toward the support plate; the above-mentioned convex portion is provided to increase the force acting on the contact surface of the support plate when the locking block abuts against the support plate, thereby strengthening the locking strength of the battery box and improving the locking effect of the locking block.

[0010] Preferably, the contact surfaces of the support plate and the battery box are connected by Velcro; the Velcro is provided to increase the connection structure between the support plate and the battery box, so that the connection between the support plate and the battery box is more secure, thereby improving the fixing effect of the battery box.

[0011] Preferably, a plurality of protruding positioning parts are respectively provided on both sides of the fixing frame, the inner wall of the positioning part abuts against the side wall of the battery box, and a pad is provided between the contact surface of the positioning part and the battery box; the setting of the above-mentioned positioning part can increase the limitation on both sides of the battery box to avoid the battery box from shifting in the horizontal direction, and the setting of the pad can increase the friction between the battery box and the limiting part, thereby increasing the fixing force of the battery box, and at the same time can increase the shock absorbing and buffering capacity to avoid damage to the battery box due to loosening and collision.

[0012] Preferably, a slope is provided on the outward side of the locking block opposite to the protrusion; the above-mentioned slope is provided so that when the battery box is placed on the fixing frame and locked, the locking block can be automatically stuck on the support plate along the slope through the action of the telescopic spring, thereby realizing rapid locking of the battery box, reducing the operation steps and effectively improving the installation efficiency of the battery box.

[0013] Preferably, a locking block and a fixing block are symmetrically arranged with respect to the locking block and the fixing block on the side of the bottom of the battery box corresponding to the location of the limiting piece, the locking block is connected to the end face of the fixing block and can reciprocate toward the support plate, and the adjacent sides of the locking block are provided with limiting pieces close to the side edges of the support plate; the locking blocks and the fixing blocks are symmetrically arranged at the bottom of the above-mentioned battery box, which can increase the fixing structure of the battery box to enhance the fixing strength of the battery box, making the battery box more reliable and stable when fixed.

[0014] Therefore, the utility model has the characteristics of being able to quickly disassemble and assemble the battery box, having a simple and reliable structure, and being easy to disassemble and assemble. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the first embodiment of the utility model.

[0016] Figure 2 yes Figure 1 Schematic diagram of the structure of the lock block.

[0017] Figure 3 yes Figure 1 Schematic diagram of the structure of the battery box.

[0018] Figure 4 It is a structural schematic diagram of the second embodiment of the utility model. DETAILED DESCRIPTION

[0019] The technical solution of the utility model is further specifically described below through embodiments and in conjunction with the accompanying drawings.

[0020] Embodiment 1:

[0021] like Figure 1-2 As shown, a self-locking structure of a battery box for an electric wheelchair comprises a fixing frame 1 connected to a wheelchair frame and a battery box 2 connected to the fixing frame 1, a supporting plate 11 abutting against the bottom surface of the battery box 2 is provided in the middle of the fixing frame 1, a limiting block 21 abutting against one side of the supporting plate 11 in the length direction is provided at the bottom of the battery box 2, a locking block 22 abutting against the plane of the supporting plate 11 is provided at the other side of the bottom of the battery box 2, a fixing block 23 is provided at the bottom of the battery box 2, the locking block 22 is connected to the end surface of the fixing block 23 and can reciprocate toward the supporting plate 11.

[0022] The above-mentioned fixing frame is connected and fixed to the wheelchair frame and is a part of the wheelchair frame. The battery box is fixed to the wheelchair frame through the fixing frame. A support plate is arranged in the middle of the support plate on the fixing frame. The plane of the support plate abuts against the bottom surface of the battery box. The limit block and the fixing block are respectively arranged on both sides of the support plate. The limit block abuts against one side of the support plate, and the fixing block is close to the other side of the support plate. When the locking block moves to the plane of the support plate, the locking block abuts against the plane of the support plate, and the battery box is locked at this time. When the locking block moves away from the plane of the support plate and is separated from the support plate, the battery box is unlocked at this time.

[0023] like Figure 2-3 As shown, a strip groove 221 is provided in the middle of the locking block 22 and is arranged along the moving direction of the locking block 22. Limiting parts 231 are provided on both sides of the fixing block 23 and are arranged parallel to the strip groove 221. Bolts 232 that pass through the strip groove 221 and are threadedly tightened with the fixing block 23 are provided on the bottom surface of the fixing block 23. A fixing plate 24 is provided at the end of the battery box 2 corresponding to the adjacent side of the fixing block 23. A convex column 222 is provided on the fixing plate 24 on the side of the locking block 22 facing the fixing plate 24. The end of the convex column 222 passes through the fixing plate 24 and is provided with a pull ring 223. A telescopic spring 224 that is sleeved on the convex column 222 is provided between the locking block 22 and the fixing plate 24. A convex portion 225 protruding toward the support plate 11 is provided on the side of the locking block 22 that contacts the support plate 11, and an inclined surface 226 is provided on the outward side of the locking block 22 opposite to the convex portion 225.

[0024] When the battery box is assembled, the limiting part is pressed against one side of the supporting plate, and the other side of the battery box is directly pressed down on the fixing frame, and the locking block can be squeezed away from the supporting plate through the inclined surface, and after the battery box is in place, it automatically moves toward the plane of the supporting plate through the action of the telescopic spring until the convex part of the locking block abuts against the plane of the supporting plate, and the convex column remains penetrated by the fixing plate, and the pull ring at the end of the convex column is located at the outer side of the fixing plate, and the two ends of the telescopic spring act on the fixing plate and the locking block, so that the locking block is kept in a state of abutting against the plane of the supporting plate, so as to lock the battery box, and when unlocking, the pull ring is pulled, and the pull ring pulls the locking block and the supporting plate apart through the convex column, so as to unlock the battery box.

[0025] like Figure 1 and 3 As shown, the contact surfaces of the support plate 11 and the battery box 2 are connected by Velcro 12, and a plurality of protruding positioning parts 13 are respectively provided on both sides of the fixing frame 1, and the inner wall of the positioning part 13 abuts against the side wall of the battery box 2, and a pad 131 is provided between the positioning part 13 and the contact surface of the battery box 2; the bottom surface of the above-mentioned battery box and the plane of the support plate are connected by Velcro, and a plurality of positioning parts are provided on both sides of the fixing frame to form a mounting groove matching with the battery box, and the positioning part is close to the side wall of the battery box to limit the side wall of the battery box and maintain the lateral stability of the battery box, and a pad is provided between the positioning part and the side wall of the battery box, and the pad is made of rubber or silicone material to increase the friction between the positioning part and the battery box and strengthen the fixing force of the battery box.

[0026] Embodiment 2:

[0027] like Figure 4 As shown, a locking block 22 and a fixing block 23 are symmetrically arranged with the locking block 22 and the fixing block 23 on the side corresponding to the limiting member 21 at the bottom of the battery box 2. The locking block 22 is connected to the end surface of the fixing block 23 and can reciprocate toward the support plate 11. The adjacent sides of the locking block 22 are provided with limiting members 21 close to the side of the support plate 11.

[0028] The bottom of the battery box is provided with a matching structure of a locking block and a fixing block corresponding to both sides of the support plate to realize two-way locking of the battery box. When the battery box is placed on the fixing frame and abutted against the support plate, the locking blocks on both sides of the support plate can be stuck on the plane of the support plate along the inclined surface at the same time to realize two-way locking of the battery box, and the limiting piece can be set to a cylindrical shape to reduce the volume, and is provided on both sides of the support plate to realize two-way limiting of the battery box.

[0029] The other structures of this embodiment are consistent with those of the first embodiment and will not be described in detail here.

Claims

1. A self-locking structure for a battery box of an electric wheelchair, characterized in that: The invention comprises a fixing frame (1) connected to a wheelchair frame and a battery box (2) connected to the fixing frame (1); a support plate (11) abutting against the bottom surface of the battery box (2) is provided at the middle of the fixing frame (1); a limiting member (21) abutting against one side of the support plate (11) in the length direction is provided at the bottom of the battery box (2); a locking block (22) abutting against the plane of the support plate (11) is provided at the other side of the bottom of the battery box (2); a fixing block (23) is provided at the bottom of the battery box (2); the locking block (22) is connected to the end surface of the fixing block (23) and can reciprocate toward the support plate (11).

2. The self-locking structure of the battery box of the electric wheelchair according to claim 1 is characterized in that: The locking block (22) is provided with a strip groove (221) penetrating the middle thereof and arranged along the moving direction of the locking block (22), both sides of the fixing block (23) are provided with limiting portions (231) arranged parallel to the strip groove (221), and the bottom surface of the fixing block (23) is provided with a bolt (232) passing through the strip groove (221) and being threadedly tightened with the fixing block (23).

3. The self-locking structure of the battery box of the electric wheelchair according to claim 1 or 2, characterized in that: A fixing plate (24) is provided at the end of the battery box (2) and is adjacent to the fixing block (23); a convex column (222) is provided on the side of the locking block (22) facing the fixing plate (24) and is penetrated by the fixing plate (24); an end of the convex column (222) passes through the fixing plate (24) and is provided with a pull ring (223); and a telescopic spring (224) is provided between the locking block (22) and the fixing plate (24) and is sleeved on the convex column (222).

4. The self-locking structure of the battery box of the electric wheelchair according to claim 1 or 2, characterized in that: A convex portion (225) protruding toward the support plate (11) is provided on a surface of the locking block (22) that contacts the support plate (11).

5. The self-locking structure of the battery box of the electric wheelchair according to claim 1 or 2, characterized in that: The support plate (11) and the contact surface of the battery box (2) are connected via a Velcro (12).

6. The self-locking structure of the battery box of an electric wheelchair according to claim 1 or 2, characterized in that: A plurality of protruding positioning portions (13) are respectively provided on both sides of the fixing frame (1); the inner walls of the positioning portions (13) abut against the side walls of the battery box (2); and a cushion block (131) is provided between the contact surfaces of the positioning portions (13) and the battery box (2).

7. The self-locking structure of the battery box of the electric wheelchair according to claim 4 is characterized in that: The locking block (22) is provided with an inclined surface (226) on an outwardly facing surface opposite to the protrusion (225).

8. The self-locking structure of the battery box of an electric wheelchair according to claim 1, characterized in that: The bottom of the battery box (2) is provided with a locking block (22) and a fixing block (23) on both sides corresponding to the support plate (11), and adjacent sides of the locking block (22) are provided with a limiting piece (21) close to the side of the support plate (11).

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