Anti-rollover electric wheelchair control device

Abstract

The utility model discloses a kind of anti-rollover electric wheelchair control devices, belong to electric wheelchair technical field, comprising: wheelchair body, the two sides of wheelchair body are equipped with power wheel, the lower end of wheelchair body is provided with the folding assembly for telescopic auxiliary wheel, the folding assembly includes the shell fixedly connected to the lower end of wheelchair body, one side of the shell is rotatably connected with two symmetrical rotating rods, the outer side wall of two connecting rods is slidably connected with sleeve, the end of two sleeve away from connecting rod is rotatably connected with auxiliary wheel by rotating shaft, the outer side wall of sleeve is rotatably connected with threaded rod, the outer side wall of the one end of the shell inner wall in two rotating rods is fixedly connected with gearwheel. The utility model can fold auxiliary wheel to the lower end of wheelchair body by folding assembly, reduce the lateral width of wheelchair body, solve the problem that wheelchair body is difficult to turn or misplace in narrow space due to fixed auxiliary wheel.

Description

Technical Field

[0001] This utility model specifically relates to an anti-tipping electric wheelchair control device, belonging to the field of electric wheelchair technology. Background Technology

[0002] Electric wheelchairs are modified from traditional manual wheelchairs by adding high-performance power drive devices, intelligent control devices, and batteries. Depending on the control method, there are joystick controllers, as well as controllers that are controlled by various switches such as head or blow-suction systems. With the continuous development of technology, electric wheelchairs have been widely produced.

[0003] During the patent application process, a search revealed a Chinese patent with patent number CN221963940U: an electric wheelchair with an anti-rollover structure. This structure utilizes anti-rollover bars and auxiliary wheels located on the outer sides of the two sets of drive wheels to provide auxiliary support when the electric wheelchair turns. The auxiliary wheels also increase the contact area between the electric wheelchair and the ground, making the wheelchair more stable and effectively preventing rollover. Furthermore, anti-rollover guardrails are installed on both sides of the wheelchair's side panels, enhancing the wheelchair's balance while in motion and further preventing the drive wheels from tipping over, thus ensuring the user's safety.

[0004] The above solution has certain drawbacks in use: for example, the auxiliary wheels are designed to be fixed in contact, and the fixed outward extension of the auxiliary wheels increases the lateral width of the wheelchair, making it difficult to turn or pass other vehicles in narrow spaces, which limits its use. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing technologies by providing an anti-tipping electric wheelchair control device to achieve the aforementioned objectives.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a wheelchair body, wherein power wheels are installed on both sides of the wheelchair body, two steering wheels are installed on the lower front end of the wheelchair body, and a folding assembly for retractable auxiliary wheels is provided at the lower end of the wheelchair body; The folding assembly includes a housing fixedly connected to the lower end of the wheelchair body. Two symmetrical rotating rods are rotatably connected to one side of the housing. Connecting rods are fixedly connected to the outer walls of the two rotating rods. Sleeves are slidably connected to the outer walls of the two connecting rods. An auxiliary wheel is rotatably connected to the end of each sleeve away from the connecting rod via a rotating shaft. A threaded rod is rotatably connected to the outer wall of the sleeve. A knob is fixedly connected to one end of the threaded rod. Gears are fixedly connected to the outer walls of the two rotating rods that pass through the inner wall of the housing.

[0007] Furthermore, the outer wall of the connecting rod is provided with multiple sets of threaded holes at equal intervals, and the multiple sets of threaded holes are threadedly connected to the threaded rod.

[0008] Furthermore, the folding assembly also includes a shaft and two sliders. A turntable is fixedly connected to the outer wall of the shaft. Two pull rods are rotatably connected to the lower end of the turntable via a rotating shaft. The two pull rods are symmetrically arranged. Both sliders are slidably connected to the inner wall of the housing. A toothed plate is fixedly connected to one side of each slider.

[0009] Furthermore, a motor is fixedly connected to the lower end of the housing, and the output end of the motor passes through the housing and is fixedly connected to the shaft.

[0010] Furthermore, the two gears are located at the lower ends of the two gear plates, and the gears are meshed with the gear plates.

[0011] Furthermore, two mounting seats are installed at the lower end of the wheelchair body. The inner walls of the two mounting seats are rotatably connected to an electric telescopic rod via a pivot. The output end of the electric telescopic rod is rotatably connected to the side wall of a connecting rod via a pivot, and a baffle is fixedly connected to the outer side wall of the connecting rod.

[0012] Furthermore, a handle is installed at the upper end of the wheelchair body, and a controller is installed at the upper end of the handle, and the controller is electrically connected to the motor and two electric telescopic rods.

[0013] Beneficial effects: The motor drives the shaft and turntable to rotate, which in turn pulls the slider along the inner wall of the housing. The slider's movement causes the toothed plate to mesh with the gear, making the rotating rod rotate. This folds the auxiliary wheels to the lower end of the wheelchair body, reducing the lateral width of the wheelchair body and solving the problem of difficulty in turning or passing in narrow spaces due to the fixed auxiliary wheels. The extended auxiliary wheels provide lateral support, reducing the risk of the wheelchair body tipping over and making it safer to use. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure from the top view of this utility model; Figure 2 This is a schematic diagram of the structure of this utility model from a lower perspective; Figure 3 This is a schematic diagram of the folding component structure of this utility model; Figure 4 This is a schematic diagram of the cross-sectional structure of the shell of this utility model; Figure 5 for Figure 2 Enlarged schematic diagram of the structure at point A in the middle.

[0015] In the diagram: 1. Wheelchair body; 2. Power wheel; 3. Steering wheel; 4. Folding assembly; 401. Housing; 402. Rotating rod; 403. Connecting rod; 404. Sleeve; 405. Auxiliary wheel; 406. Threaded rod; 407. Knob; 408. Gear; 41. Shaft; 42. Slider; 43. Turntable; 44. Pull rod; 45. Gear plate; 5. Motor; 6. Mounting base; 7. Electric telescopic rod; 8. Handle. Detailed Implementation

[0016] 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.

[0017] Please see Figure 1-5 As shown, an anti-tipping electric wheelchair control device includes: a wheelchair body 1, power wheels 2 installed on both sides of the wheelchair body 1, two steering wheels 3 installed on the lower front end of the wheelchair body 1, and a folding assembly 4 for retractable auxiliary wheels provided at the lower end of the wheelchair body 1. The folding assembly 4 includes a housing 401 fixedly connected to the lower end of the wheelchair body 1. Two symmetrical rotating rods 402 are rotatably connected to one side of the housing 401. Connecting rods 403 are fixedly connected to the outer walls of the two rotating rods 402. Sleeves 404 are slidably connected to the outer walls of the two connecting rods 403. Auxiliary wheels 405 are rotatably connected to the ends of the two sleeves 404 away from the connecting rods 403 via a pivot. Threaded rods 406 are rotatably connected to the outer walls of the sleeves 404. A knob 407 is fixedly connected to one end of the threaded rods 406. Gears 408 are fixedly connected to the outer walls of the inner walls of the two rotating rods 402. By rotating the rotating rods 402, the auxiliary wheels 405 can be unfolded from the lower end of the wheelchair body 1 to both sides, or the auxiliary wheels 405 can be folded to the lower end of the wheelchair body 1.

[0018] Multiple sets of threaded holes are evenly spaced on the outer wall of the connecting rod 403, and these threaded holes are threadedly connected to the threaded rod 406. The length of the extended auxiliary wheel 405 can be adjusted through these multiple sets of threaded holes, which facilitates further reduction of the footprint of the auxiliary wheel 405 when it is folded.

[0019] The folding assembly 4 also includes a shaft 41 and two sliders 42. A turntable 43 is fixedly connected to the outer wall of the shaft 41. Two pull rods 44 are rotatably connected to the lower end of the turntable 43 via a pivot, and the two pull rods 44 are symmetrically arranged. Both sliders 42 are slidably connected to the inner wall of the housing 401, and a toothed plate 45 is fixedly connected to one side of each slider 42. The rotation of the turntable 43 drives the two pull rods 44 to move and pull the two sliders 42 to slide along the inner wall of the housing 401. The sliders 42 slide and drive the gear 408 to rotate through the toothed plate 45, thereby completing the folding and unfolding of the auxiliary wheel 405.

[0020] A motor 5 is fixedly connected to the lower end of the housing 401. The output end of the motor 5 passes through the housing 401 and is fixedly connected to the shaft 41. The motor 5 drives the shaft 41 to rotate the turntable 43, thereby facilitating the unfolding and folding of the auxiliary wheel 405.

[0021] Two gears 408 are located at the lower ends of two toothed plates 45, and the gears 408 are meshed with the toothed plates 45. The sliding of the slider 42 on the inner wall of the housing 401 causes the toothed plates 45 to move, thereby causing the gears 408 to rotate.

[0022] Two mounting seats 6 are installed at the lower end of the wheelchair body 1. The inner walls of the two mounting seats 6 are rotatably connected to an electric telescopic rod 7 via a pivot. The output end of the electric telescopic rod 7 is rotatably connected to the side wall of the connecting rod 403 via a pivot, and a baffle is fixedly connected to the outer wall of the connecting rod 403. The electric telescopic rod 7 can provide lateral support to the connecting rod 403, improving the stability of the connecting rod 403. At the same time, the baffle also prevents the sleeve 404 from damaging the electric telescopic rod 7 when it slides on the outer wall of the connecting rod 403.

[0023] A handle 8 is mounted on the upper part of the wheelchair body 1. A controller is mounted on the upper part of the handle 8, and the controller is electrically connected to the motor 5 and the two electric telescopic rods 7. In addition, the wheelchair body 1 is an electric wheelchair, driven by electricity to rotate the power wheels 2. The controller is integrated into the wheelchair body 1 and is existing technology, so it will not be described further. The controller allows the user to control the folding and unfolding of the auxiliary wheels 405.

[0024] The implementation principle of the anti-tipping electric wheelchair control device in this application embodiment is as follows: When the user uses it, the two unfolded auxiliary wheels 405 provide lateral support for the wheelchair body 1 to prevent the wheelchair body 1 from tipping over. When the wheelchair body 1 does not need the auxiliary wheels 405 or encounters a narrow space that is difficult to pass through, the controller can start the motor 5 to output the shaft 41 and the turntable 43 to rotate. The rotation of the turntable 43 will pull the two connecting rods 403, causing the two sliders 42 to slide along the inner wall of the housing 401 in opposite directions. The sliding of the two sliders 42 will drive the toothed plate 45 to mesh with the gear 408, thereby driving the two rotating rods 402 to rotate. The rotation of the rotating rods 402 will retract the auxiliary wheels 405 at the lower end of the sleeve 404 towards the wheelchair body 1 and fold them to the lower end of the wheelchair body 1, thereby reducing the space occupied.

[0025] When the auxiliary wheel 405 needs to be deployed, the motor 5 can be reversed by starting the controller. When both sliders 42 slide to the two ends of the inner wall of the housing 401, the angle between the connecting rod 403 and the vertical ground is 30 degrees. At the same time, the auxiliary wheel 405 also contacts the horizontal ground and provides support.

[0026] During the retraction of the auxiliary wheel 405, the knob 407 can be rotated to disengage the threaded rod 406 from the threaded hole. At this time, the sleeve 404 can be pushed to shorten the length of the auxiliary wheel 405, making it easier to store it later.

[0027] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0028] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A control device for an anti-tipping electric wheelchair, comprising: The wheelchair body (1) is characterized in that: power wheels (2) are installed on both sides of the wheelchair body (1), two steering wheels (3) are installed on the lower front side of the wheelchair body (1), and a folding assembly (4) for retractable auxiliary wheels is provided at the lower end of the wheelchair body (1). The folding assembly (4) includes a housing (401) fixedly connected to the lower end of the wheelchair body (1). Two symmetrical rotating rods (402) are rotatably connected to one side of the housing (401). A connecting rod (403) is fixedly connected to the outer side wall of the two rotating rods (402). A sleeve (404) is slidably connected to the outer side wall of the two connecting rods (403). An auxiliary wheel (405) is rotatably connected to the end of the two sleeves (404) away from the connecting rod (403) through a rotating shaft. A threaded rod (406) is rotatably connected to the outer side wall of the sleeve (404). A knob (407) is fixedly connected to one end of the threaded rod (406). A gear (408) is fixedly connected to the outer side wall of one end of the inner wall of the housing (401) of the two rotating rods (402).

2. The anti-tipping electric wheelchair control device as described in claim 1, characterized in that: The outer wall of the connecting rod (403) has multiple sets of threaded holes at equal intervals, and the multiple sets of threaded holes are threadedly connected to the threaded rod (406).

3. The anti-tipping electric wheelchair control device as described in claim 1, characterized in that: The folding assembly (4) also includes a shaft (41) and two sliders (42). A turntable (43) is fixedly connected to the outer wall of the shaft (41). Two pull rods (44) are rotatably connected to the lower end of the turntable (43) through a rotating shaft. The two pull rods (44) are symmetrically arranged. The two sliders (42) are slidably connected to the inner wall of the housing (401). A toothed plate (45) is fixedly connected to one side of each of the two sliders (42).

4. The anti-tipping electric wheelchair control device as described in claim 1, characterized in that: A motor (5) is fixedly connected to the lower end of the housing (401), and the output end of the motor (5) passes through the housing (401) and is fixedly connected to the shaft (41).

5. The anti-tipping electric wheelchair control device as described in claim 1, characterized in that: The two gears (408) are located at the lower ends of the two tooth plates (45), and the gears (408) are meshed with the tooth plates (45).

6. The anti-tipping electric wheelchair control device as described in claim 1, characterized in that: Two mounting seats (6) are installed at the lower end of the wheelchair body (1). The inner walls of the two mounting seats (6) are rotatably connected to an electric telescopic rod (7) via a rotating shaft. The output end of the electric telescopic rod (7) is rotatably connected to the side wall of the connecting rod (403) via a rotating shaft, and a baffle is fixedly connected to the outer side wall of the connecting rod (403).

7. The anti-tipping electric wheelchair control device as described in claim 1, characterized in that: The upper end of the wheelchair body (1) is equipped with a handle (8), and the upper end of the handle (8) is equipped with a controller, which is electrically connected to the motor (5) and two electric telescopic rods (7).

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