Electric wheelchair pedal adjusting structure

Abstract

The utility model discloses a kind of electric wheelchair footboard adjusting structure, belong to electric wheelchair technical field, its technical scheme main point includes electric wheelchair main body, the bottom of the electric wheelchair main body is provided with adjusting assembly, the front side of the adjusting assembly is provided with footboard assembly, the adjusting assembly includes double-shaft motor fixedly connected in the bottom of electric wheelchair main body, can solve the existing electric wheelchair footboard adjusting structure usually in footboard left and right distance adjustment adopts fixed pitch design, it is inconvenient to left and right distance adjustment according to the actual demand of user, uneven stress is easily caused to leg in long-term use, affect ride comfort, and in footboard angle adjustment adopts multiple bolts locking to realize limited gear adjustment, its angle adjustment flexibility is poor and time-consuming operation, to lead to different height, leg length user cannot find suitable footboard support position, affect use adaptability problem.

Description

Technical Field

[0001] This utility model relates to the field of electric wheelchair technology, and in particular to an electric wheelchair foot pedal adjustment structure. Background Technology

[0002] Early manual wheelchairs typically had fixed foot pedals, requiring users to manually push the wheels forward. The position of the feet was relatively secondary. With the advent of electric wheelchairs, users' hands were freed, eliminating the need to drive the wheelchair. At this point, the support and comfort of the feet became crucial.

[0003] Currently, the main users of electric wheelchairs are the elderly. The adjustment of the backrest and pedals is mostly done by buttons on a control panel. However, the elderly are prone to making mistakes or not knowing how to operate the buttons. The existing patent (publication number: CN214761863U) discloses an electric wheelchair adjustment structure that adopts a single-sided corresponding foot pedal adjustment method and changes the control switch to a toggle switch. The corresponding switches are set on both sides of the seat bar, which allows the elderly to adjust the wheelchair very simply and quickly. It is highly practical and easy to use.

[0004] To address the aforementioned issues, existing patents offer solutions. However, current electric wheelchair foot pedal adjustment structures typically employ a fixed spacing design for left and right foot pedal adjustments, making it difficult to adjust the distance according to the user's actual needs. Long-term use can easily lead to uneven leg pressure, affecting riding comfort. Furthermore, the foot pedal angle adjustment uses multiple sets of bolts to achieve limited adjustment levels, resulting in poor angle adjustment flexibility and time-consuming operation. Consequently, users of different heights and leg lengths cannot find a suitable foot pedal support position, affecting usability.

[0005] Therefore, a foot pedal adjustment structure for electric wheelchairs is proposed. Utility Model Content

[0006] The purpose of this utility model is to provide an electric wheelchair foot pedal adjustment structure that solves the problem that existing electric wheelchair foot pedal adjustment structures usually adopt a fixed spacing design for adjusting the left and right distance of the foot pedals, which is not convenient for adjusting the left and right distance according to the actual needs of the user. Long-term use can easily cause uneven leg pressure and affect riding comfort. Moreover, the foot pedal angle adjustment uses multiple sets of bolts to achieve limited adjustment levels, which has poor angle adjustment flexibility and is time-consuming. As a result, users of different heights and leg lengths cannot find a suitable foot pedal support position, affecting the adaptability of use.

[0007] To achieve the above objectives, this utility model provides the following technical solution: an electric wheelchair foot pedal adjustment structure, comprising an electric wheelchair body, an adjustment component at the bottom of the electric wheelchair body, a foot pedal component at the front of the adjustment component, the adjustment component including a dual-axis motor fixedly connected to the bottom of the electric wheelchair body, a synchronous pulley fixedly connected to the output end of the dual-axis motor, a synchronous belt drivingly connected to the outer side of the synchronous pulley, an adjustment frame fixedly connected to the bottom of the electric wheelchair body, a bidirectional lead screw rotatably connected inside the adjustment frame, the bidirectional lead screw being fixedly connected to the front synchronous pulley, movable blocks threadedly connected to both sides of the bidirectional lead screw, and a mounting base fixedly connected to the bottom of the movable blocks.

[0008] Preferably, the foot pedal assembly includes a drive motor fixedly connected to the inside of the mounting base, and a connecting rod is fixedly connected to the output end of the drive motor.

[0009] Preferably, an adjusting rod is slidably connected to the bottom of the connecting rod, and a positioning groove is provided inside the adjusting rod.

[0010] Preferably, a positioning lever is slidably connected to the top of the connecting rod, the positioning lever engages with the positioning groove, and a foot pedal is fixedly connected to the front side of the adjusting rod.

[0011] Preferably, an auxiliary backrest is fixedly connected to the rear side of the main body of the electric wheelchair, and the auxiliary backrest is made of silicone.

[0012] Preferably, a push handle is fixedly connected to the top of the electric wheelchair body, and an anti-slip sleeve is fitted on the outside of the push handle.

[0013] Preferably, a control motor is fixedly connected to the bottom of the electric wheelchair body, and a drive wheel is mounted on the output end of the control motor via a transmission shaft and a transmission belt.

[0014] Preferably, a limiting groove is provided inside the adjusting frame, and a limiting slider is slidably connected inside the limiting groove, and the limiting slider is fixedly connected to the moving block.

[0015] Compared with the prior art, the beneficial effects of this utility model are: 1. This application achieves precise and synchronous adjustment of the left and right distance of the foot pedal assembly through the adjustment component, stabilizes transmission, and avoids adjustment deviation. It improves the accuracy of foot pedal adjustment and the reliability of structural operation of electric wheelchairs. It can realize the coordinated transmission of synchronous belt and bidirectional lead screw under the drive of dual-axis motor, and the smooth linear movement of the moving block under the guidance of limit slide groove and limit slider. It solves the problems of traditional electric wheelchair foot pedals, which are mostly designed with fixed spacing or require manual adjustment of left and right positions with the help of tools, resulting in low adjustment efficiency, asynchronous left and right adjustment, and easy deviation leading to discomfort during use. 2. This application achieves flexible adjustment of the foot pedal angle and front-to-back length, and quick locking of the adjustment position through the foot pedal assembly, thereby improving the adaptability and riding comfort of electric wheelchairs for users of different heights and leg lengths. It can realize the electric adjustment of the foot pedal angle driven by the drive motor and the manual quick fixing of the front-to-back length of the foot pedal by the positioning rod and the positioning groove. It solves the problems of traditional electric wheelchairs where the foot pedal angle is fixed, the front-to-back length is not adjustable or adjustment requires the removal of bolts and other fasteners, the operation is cumbersome, it is difficult to adapt to different users' leg sizes, and long-term use can easily cause leg fatigue. Attached Figure Description

[0016] Figure 1 This is an overall structural diagram of the foot pedal adjustment structure of the electric wheelchair of this utility model. Figure 2 This is a schematic diagram of the bottom of the main body of the electric wheelchair of this utility model; Figure 3 This is a schematic diagram of the structure of the adjusting frame and connecting rod of this utility model; Figure 4 This is a schematic diagram of the structure of the adjustment component of this utility model; Figure 5 This is a schematic diagram of the foot pedal assembly of this utility model.

[0017] In the diagram, 1. Electric wheelchair body; 2. Control motor; 3. Drive wheel; 4. Adjustment assembly; 401. Dual-axis motor; 402. Synchronous wheel; 403. Synchronous belt; 404. Adjustment frame; 405. Two-way lead screw; 406. Moving block; 407. Mounting base; 5. Foot pedal assembly; 501. Drive motor; 502. Connecting rod; 503. Adjustment rod; 504. Positioning groove; 505. Positioning latch; 506. Foot pedal; 6. Assistive backrest; 7. Push handle; 8. Anti-slip sleeve; 9. Limiting slide groove; 10. Limiting slider. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] Please see Figure 1-5 The present invention provides the following technical solution: An electric wheelchair foot pedal adjustment structure includes an electric wheelchair body 1, an adjustment component 4 at the bottom of the electric wheelchair body 1, and a foot pedal component 5 at the front of the adjustment component 4. The adjustment component 4 includes a dual-axis motor 401 fixedly connected to the bottom of the electric wheelchair body 1, a synchronous pulley 402 fixedly connected to the output end of the dual-axis motor 401, a synchronous belt 403 drivingly connected to the outer side of the synchronous pulley 402, an adjustment frame 404 fixedly connected to the bottom of the electric wheelchair body 1, a bidirectional lead screw 405 rotatably connected inside the adjustment frame 404, the bidirectional lead screw 405 fixedly connected to the front synchronous pulley 402, and movable blocks 406 threadedly connected to both sides of the bidirectional lead screw 405. A mounting base 407 is fixedly connected to the bottom of the movable block 406.

[0020] In this embodiment: By starting the dual-axis motor 401 fixed at the bottom of the electric wheelchair body 1, the output end of the dual-axis motor 401 drives the synchronous wheel 402 to rotate. The synchronous wheel 402 transmits power to the front synchronous wheel 402 fixedly connected to the bidirectional lead screw 405 through the outer engagement synchronous belt 403, causing the bidirectional lead screw 405 to rotate inside the adjustment frame 404. Since the threads on both sides of the bidirectional lead screw 405 have opposite directions of rotation, and both sides are threaded with moving blocks 406, when the bidirectional lead screw 405 rotates, it will drive the moving blocks 406 on both sides to move in opposite or opposite directions along the lead screw. At the same time, the moving blocks 406 drive the mounting base 407 fixed at the bottom to move synchronously. The mounting base 407 then drives the foot pedal assembly 5 connected to the front to adjust its left and right position until the left and right distance of the foot pedal 506 meets the user's needs.

[0021] Specifically, such as Figure 5 As shown, the foot pedal assembly 5 includes a drive motor 501 fixedly connected to the inside of the mounting base 407, and a connecting rod 502 is fixedly connected to the output end of the drive motor 501.

[0022] Specifically, such as Figure 5 As shown, an adjusting rod 503 is slidably connected to the bottom of the connecting rod 502, and a positioning groove 504 is provided inside the adjusting rod 503.

[0023] Specifically, such as Figure 5 As shown, a positioning rod 505 is slidably connected to the top of the connecting rod 502, and the positioning rod 505 is engaged with the positioning groove 504. A foot pedal 506 is fixedly connected to the front side of the adjusting rod 503.

[0024] In this embodiment: When the user needs to adjust the angle of the foot pedal 506, the drive motor 501 fixed inside the mounting base 407 is activated. The drive motor 501 outputs power to drive the connecting rod 502 at its output end to rotate. When the connecting rod 502 rotates, it will drive the adjusting rod 503 slidably connected at the bottom to rotate synchronously. The adjusting rod 503 then drives the foot pedal 506 fixed at the front to rotate together. When the foot pedal 506 rotates to an angle that the user feels comfortable, the drive motor 501 is turned off, the connecting rod 502 stops rotating, and the angle of the foot pedal 506 is fixed. When the user needs to adjust the front and back length of the foot pedal 506 to fit their own leg length, the positioning latch 505 at the top of the connecting rod 502 is slid upward to disengage the positioning latch 505 from the positioning groove 504 inside the adjusting rod 503, releasing the fixed relationship between the adjusting rod 503 and the connecting rod 502. Then, the adjusting rod 503 is pushed or pulled as needed to adjust the length of the adjusting rod 503 extending out of the connecting rod 502 until the front and back position of the foot pedal 506 meets the requirements for placing both feet.

[0025] Specifically, such as Figure 1 As shown, an auxiliary backrest 6 is fixedly connected to the rear side of the electric wheelchair body 1. The auxiliary backrest 6 is made of silicone.

[0026] Specifically, such as Figure 2 As shown, a push handle 7 is fixedly connected to the top of the electric wheelchair body 1, and an anti-slip sleeve 8 is fitted on the outside of the push handle 7.

[0027] In this embodiment: By setting up an auxiliary backrest 6, when the user sits on the electric wheelchair, their back will naturally fit against the auxiliary backrest 6 fixed to the rear side of the electric wheelchair body 1. The auxiliary backrest 6 can provide stable support for the user's back, preventing the user's back from being unsupported or unevenly stressed due to prolonged sitting. At the same time, its silicone material has good softness and conformability, which can reduce the hard friction between the backrest and the skin of the back, and reduce the local pressure caused by prolonged sitting. By setting up a push handle 7 and an anti-slip sleeve 8, when others assist in moving the wheelchair, the assistant can hold the push handle 7 fixed to the top of the electric wheelchair body 1. At this time, the anti-slip sleeve 8 on the outside of the push handle 7 can increase the friction between the hand and the push handle 7, improving the safety of use.

[0028] Specifically, such as Figure 2 As shown, a control motor 2 is fixedly connected to the bottom of the electric wheelchair body 1, and a drive wheel 3 is installed at the output end of the control motor 2 through a transmission shaft and a transmission belt.

[0029] Specifically, such as Figure 4 As shown, a limiting groove 9 is provided inside the adjusting frame 404, and a limiting slider 10 is slidably connected inside the limiting groove 9. The limiting slider 10 is fixedly connected to the moving block 406.

[0030] In this embodiment: By setting up a control motor 2 and a drive wheel 3, when the user needs the drive wheel 3 to move, the control motor 2, which is fixed to the bottom of the electric wheelchair body 1, is activated. The power output by the control motor 2 is transmitted to the transmission belt through the transmission shaft, and the transmission belt then transmits the power to the drive wheel 3, causing the drive wheel 3 to rotate. During the rotation of the drive wheel 3, friction is generated with the ground, thereby driving the entire electric wheelchair body 1 to move along the ground. By setting up a limiting groove 9 and a limiting slider 10, when the bidirectional lead screw 405 rotates in the adjustment frame 404, it drives the moving blocks 406 threaded on both sides of it to move. At this time, the limiting slider 10, which is fixedly connected to the moving block 406, will slide synchronously in the limiting groove 9 inside the adjustment frame 404. The limiting groove 9 provides a fixed motion trajectory for the limiting slider 10, preventing the moving block 406 from circumferentially shifting as the bidirectional lead screw 405 rotates, and ensuring that the moving block 406 always moves smoothly in a straight line.

[0031] Working Principle: When adjusting the footrest 506 during the use of this electric wheelchair, if the left and right distance of the footrest 506 needs to be adjusted, the dual-axis motor 401 starts and drives the synchronous wheel 402 at its output end to rotate. The synchronous wheel 402 drives the front synchronous wheel 402 fixed to the bidirectional lead screw 405 to rotate through the outer synchronous belt 403, causing the bidirectional lead screw 405 inside the adjustment frame 404 to rotate accordingly. During the rotation of the bidirectional lead screw 405, the moving blocks 406 threaded on both sides of it move linearly in opposite directions along the bidirectional lead screw 405 under the cooperation of the limiting slide groove 9 and the limiting slider 10 inside the adjustment frame 404. The mounting base 407 at the bottom of the moving block 406 moves synchronously with the moving block 406, thereby driving the footrest assembly 5 connected to the mounting base 407 to adjust the left and right position as a whole. When the angle of the foot pedal 506 needs to be adjusted, the drive motor 501 inside the mounting base 407 starts, driving the connecting rod 502 at its output end to rotate. The connecting rod 502 drives the adjusting rod 503 and the foot pedal 506 fixed to the adjusting rod 503 to rotate together until the appropriate angle is reached. If the front and rear length of the foot pedal 506 needs to be adjusted, slide the positioning rod 505 at the top of the connecting rod 502 upwards, so that the positioning rod 505 disengages from the positioning groove 504 inside the adjusting rod 503. At this time, the adjusting rod 503 can be pushed or pulled to adjust its length extending out of the connecting rod 502. After adjustment, release the positioning rod 505, and the positioning rod 505 resets and locks into the corresponding positioning groove 504 of the adjusting rod 503, fixing the adjusting rod 503 and thus locking the front and rear length of the foot pedal 506 to meet the needs of different users.

[0032] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An electric wheelchair footboard adjusting structure, comprising an electric wheelchair body (1), characterized in that: An adjustment assembly (4) is provided at the bottom of the electric wheelchair body (1). A foot pedal assembly (5) is provided at the front side of the adjustment assembly (4). The adjustment assembly (4) includes a dual-axis motor (401) fixedly connected to the bottom of the electric wheelchair body (1). A synchronous pulley (402) is fixedly connected to the output end of the dual-axis motor (401). A synchronous belt (403) is driven to the outside of the synchronous pulley (402). An adjustment frame (404) is fixedly connected to the bottom of the electric wheelchair body (1). A two-way lead screw (405) is rotatably connected inside the adjustment frame (404). The two-way lead screw (405) is fixedly connected to the front synchronous pulley (402). Moving blocks (406) are threadedly connected to both sides of the two-way lead screw (405). A mounting base (407) is fixedly connected to the bottom of the moving block (406).

2. The electric wheelchair pedal adjusting structure according to claim 1, characterized in that: The foot pedal assembly (5) includes a drive motor (501) fixedly connected to the inside of the mounting base (407), and a connecting rod (502) is fixedly connected to the output end of the drive motor (501).

3. The electric wheelchair foot pedal adjustment structure according to claim 2, characterized in that: The bottom of the connecting rod (502) is slidably connected to an adjusting rod (503), and the adjusting rod (503) has a positioning groove (504) inside.

4. The electric wheelchair foot pedal adjustment structure according to claim 3, characterized in that: The top of the connecting rod (502) is slidably connected to a positioning rod (505), which engages with the positioning groove (504). The front side of the adjusting rod (503) is fixedly connected to a foot pedal (506).

5. The electric wheelchair pedal adjusting structure according to claim 1, characterized in that: An auxiliary backrest (6) is fixedly connected to the rear side of the main body (1) of the electric wheelchair. The auxiliary backrest (6) is made of silicone.

6. The electric wheelchair foot pedal adjustment structure according to claim 1, characterized in that: The top of the electric wheelchair body (1) is fixedly connected to a push handle (7), and the outside of the push handle (7) is covered with an anti-slip sleeve (8).

7. The electric wheelchair foot pedal adjustment structure according to claim 1, characterized in that: The bottom of the electric wheelchair body (1) is fixedly connected to a control motor (2), and the output end of the control motor (2) is equipped with a drive wheel (3) through a transmission shaft and a transmission belt.

8. The electric wheelchair foot pedal adjustment structure according to claim 1, characterized in that: The adjustment frame (404) has a limiting groove (9) inside, and a limiting slider (10) is slidably connected inside the limiting groove (9). The limiting slider (10) is fixedly connected to the moving block (406).

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