Lifting mechanism for electric wheelchair

Abstract

The utility model discloses a lifting mechanism for an electric wheelchair, and relates to the technical field of electric wheelchairs, in particular to the lifting mechanism for the electric wheelchair, which comprises the electric wheelchair, the lifting mechanism is arranged on the electric wheelchair and is used for lifting large wheels, and the lifting mechanism comprises a main body component, a lifting component and a lifting component, comprising a main frame arranged below the electric wheelchair, vertical frames fixed to the four corners of the top of the main frame, a transverse frame fixed between the front vertical frame and the rear vertical frame, first connecting pieces hinged between the two sides of the two ends of the main frame, an auxiliary frame fixed between the bottoms of the first connecting pieces on the two sides, and a reinforcing frame fixed to the front end in the auxiliary frame. Second connecting pieces are fixed to the two sides of the top of the reinforcing frame. The adjusting assembly comprises an upper shaft rod fixed between the rear ends of the transverse frames on the two sides. By means of the lifting mechanism, when the electric wheelchair crosses the curbstone, the large wheels of the electric wheelchair can be lifted upwards, the electric wheelchair can conveniently cross the curbstone, and the electric wheelchair is kept stable in the crossing process.

Description

Technical Field

[0001] The utility model relates to the technical field of electric wheelchairs, in particular to a lifting mechanism for electric wheelchairs. Background Art

[0002] Since the inconvenience of legs and feet restricts the activities of the elderly, it seriously affects their physical and mental health and their later life. Therefore, various electric wheelchairs that assist the elderly in their movements have appeared on the market.

[0003] After checking the announcement number: CN218684982U, an electric wheelchair is disclosed. This technology discloses "an electric wheelchair, which includes: a body and a vehicle base; the body includes: a body frame and a vehicle cushion installed on the body frame; the vehicle base includes: a chassis, wheels and a lifting mechanism; the wheels are installed on the chassis; the lifting mechanism includes: an outer shell, an inner shell, a central axis assembly and a lifting power unit, the outer shell is installed on the chassis, the inner shell is accommodated in the outer shell, the lifting power unit is installed in the outer shell and can drive the inner shell to extend from the outer shell, the central axis assembly is installed in the inner shell and moves synchronously with the inner shell, and the extended end of the central axis assembly is detachably connected to the bottom of the vehicle cushion" and other technical solutions, which have "the functions of seat height adjustment and universal wheel opening and retracting are realized by using an electric push rod to drive the inner and outer shells and the chassis of the four four-link structure. Compared with the existing electric wheelchairs, it not only has the seat lifting function, but also has the advantage of being portable after the upper and lower parts are disassembled" and other technical effects;

[0004] When an electric wheelchair faces steps or curbs, it is necessary to ensure that the large wheels can roll accurately and smoothly to the edge of the curb. Then, the operator needs to make timely fine adjustments and increase the driving force to help the wheelchair transition smoothly and smoothly to the curb. However, the electric wheelchair in the above solution lacks a special transition lifting mechanism, which may make it difficult for the operator and the wheelchair to maintain balance during the transition, thereby increasing potential safety risks. Utility Model Content

[0005] In view of the deficiencies in the prior art, the utility model provides a lifting mechanism for an electric wheelchair, which has the characteristics that when the electric wheelchair steps onto the curb, the large wheels of the electric wheelchair can be lifted upwards through the lifting mechanism, making it convenient to step onto the curb, and the electric wheelchair remains stable during the stepping over process.

[0006] To achieve the above objectives, the utility model is implemented through the following technical solutions: a lifting mechanism for an electric wheelchair, comprising an electric wheelchair, the electric wheelchair is provided with a lifting mechanism and used for lifting the large wheel, the lifting mechanism comprising:

[0007] The main body assembly includes a main frame arranged below the electric wheelchair, vertical frames fixed at four corners of the top of the main frame, a horizontal frame fixed between the front and rear vertical frames, a first connecting piece hinged between the two ends of the main frame, a sub-frame fixed between the bottoms of the first connecting pieces on both sides, a reinforcement frame fixed at the front end of the sub-frame, and second connecting pieces fixed on both sides of the top of the reinforcement frame;

[0008] The adjustment assembly includes an upper shaft rod fixed between the rear ends of the two side cross frames, an upper rotating rod rotatably mounted at both ends of the upper shaft rod, a lower rotating rod pivotally connected to the lower end of the upper rotating rod, and the lower end of the lower rotating rod is pivotally connected to the second connecting member, a lower shaft rod fixed between the lower ends of the lower rotating rods on both sides, and an electric telescopic rod pivotally connected to the middle of the upper shaft rod, and the output end of the electric telescopic rod is pivotally connected to the middle of the lower shaft rod;

[0009] The telescopic assembly includes a slide frame slidably mounted inside the sub-frame.

[0010] Preferably, the telescopic assembly also includes support rods slidably installed on both sides of the slide, an axis frame fixed between the lower ends of the support rods on both sides, support wheels rotatably installed on both sides of the axis frame, a screw rotatably installed inside the sub-frame, and the screw is threadedly connected to the slide, and a motor is installed at the rear end of the sub-frame, and the output end of the motor is connected to the screw.

[0011] Preferably, the telescopic assembly further comprises a cylinder fixed on both sides of the rear end of the slide, a damper installed inside the cylinder, a spring installed inside the cylinder, and the spring is sleeved on the support rod.

[0012] Preferably, the support rod is slidably mounted through the reinforcement frame and the auxiliary frame, and the damper is fixed on the outer wall at the rear end of the support rod.

[0013] Preferably, the main frame, vertical frame, horizontal frame, auxiliary frame and reinforcement frame are all made of hollow stainless steel pipe structure.

[0014] Preferably, the main body assembly further comprises a mounting frame fixed on the tops of the front and rear upright frames, and the mounting frame is fixed on a frame at the bottom of the electric wheelchair seat.

[0015] Beneficial Effects

[0016] The utility model provides a lifting mechanism for an electric wheelchair. Compared with the prior art, the utility model has the following beneficial effects:

[0017] (1) The output end of the electric telescopic rod drives the lower shaft rod to cooperate with the lower rotating rod to drive the upper rotating rod to rotate. At the same time, the lower rotating rod also drives the sub-frame to flip downward through the second connecting piece and the reinforcement frame, so that the sub-frame drives the telescopic assembly to support the ground, thereby lifting the large wheel of the electric wheelchair upward, making it easier for the electric wheelchair to step onto the curb.

[0018] (2) The output end of the motor drives the lead screw to drive the slide to move along the inside of the sub-frame; when the main assembly is unfolded, the telescopic assembly extends outward until the support wheel touches the ground; when the main assembly is folded, the telescopic assembly contracts inward, so that the lifting mechanism can be stored at the bottom of the electric wheelchair. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model when folded;

[0020] Figure 2 It is a schematic diagram of the three-dimensional structure of the utility model when it is unfolded;

[0021] Figure 3 It is a structural schematic diagram of the sub-frame in the utility model;

[0022] Figure 4 It is a structural schematic diagram of the telescopic component in the utility model;

[0023] Figure 5 It is a structural schematic diagram of the installation position of the utility model.

[0024] In the figure: 1. electric wheelchair; 2. lifting mechanism; 21. main body assembly; 211. main frame; 212. vertical frame; 213. horizontal frame; 214. mounting frame; 215. first connecting piece; 216. auxiliary frame; 217. reinforcement frame; 218. second connecting piece; 22. adjustment assembly; 221. upper shaft rod; 222. upper rotating rod; 223. lower rotating rod; 224. lower shaft rod; 225. electric telescopic rod; 23. telescopic assembly; 231. slide frame; 232. support rod; 233. shaft frame; 234. support wheel; 235. lead screw; 236. motor; 237. cylinder; 238. damping; 239. spring. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] See also Figure 1-5 The utility model provides a technical solution for a lifting mechanism for an electric wheelchair: a lifting mechanism for an electric wheelchair, comprising an electric wheelchair 1, a lifting mechanism 2 is provided on the electric wheelchair 1 and is used for lifting the large wheel, and the lifting mechanism 2 comprises:

[0027] The main body assembly 21 includes a main frame 211 disposed below the electric wheelchair 1, a vertical frame 212 fixed at four corners of the top of the main frame 211, a horizontal frame 213 fixed between the front and rear vertical frames 212, a first connecting member 215 hinged between the two ends of the main frame 211, and a sub-frame 216 fixed between the bottoms of the first connecting members 215 on both sides, a reinforcement frame 217 fixed at the front end of the sub-frame 216, and second connecting members 218 fixed on both sides of the top of the reinforcement frame 217;

[0028] The adjustment assembly 22 includes an upper shaft rod 221 fixed between the rear ends of the cross frames 213 on both sides, an upper rotating rod 222 rotatably mounted at both ends of the upper shaft rod 221, a lower rotating rod 223 pivotally connected to the lower end of the upper rotating rod 222, and the lower end of the lower rotating rod 223 is pivotally connected to the second connecting member 218, a lower shaft rod 224 fixed between the lower ends of the lower rotating rods 223 on both sides, and an electric telescopic rod 225 pivotally connected to the middle of the upper shaft rod 221, and the output end of the electric telescopic rod 225 is pivotally connected to the middle of the lower shaft rod 224;

[0029] The telescopic assembly 23 includes a slide frame 231 slidably mounted inside the sub-frame 216 .

[0030] In this embodiment, the output end of the electric telescopic rod 225 drives the lower shaft rod 224 to cooperate with the lower rotating rod 223 to drive the upper rotating rod 222 to rotate. At the same time, the lower rotating rod 223 also drives the sub-frame 216 to flip downward through the second connecting piece 218 and the reinforcement frame 217, so that the sub-frame 216 drives the telescopic component 23 to support the ground, thereby lifting the large wheel of the electric wheelchair 1 upward, making it easier for the electric wheelchair 1 to step onto the curb.

[0031] Specifically, the telescopic assembly 23 also includes support rods 232 slidably installed on both sides of the slide 231, an axis frame 233 fixed between the lower ends of the support rods 232 on both sides, support wheels 234 rotatably installed on both sides of the axis frame 233, a screw 235 rotatably installed inside the sub-frame 216, and the screw 235 is threadedly connected to the slide 231, and a motor 236 is installed at the rear end of the sub-frame 216, and the output end of the motor 236 is connected to the screw 235.

[0032] In this embodiment, the output end of the motor 236 drives the lead screw 235 to drive the slide 231 to move along the inside of the sub-frame 216; when the main body component 21 is unfolded, the telescopic component 23 extends outward until the support wheel 234 contacts the ground; when the main body component 21 is folded, the telescopic component 23 contracts inward, so that the lifting mechanism 2 can be stored at the bottom of the electric wheelchair 1.

[0033] Specifically, the telescopic assembly 23 also includes a cylinder 237 fixed on both sides of the rear end of the slide 231 , a damper 238 installed inside the cylinder 237 , and a spring 239 installed inside the cylinder 237 , and the spring 239 is sleeved on the support rod 232 .

[0034] In this embodiment, when the support rod 232 is supporting, the impact caused by contact with the ground can be buffered by the damper 238 and the spring 239.

[0035] Specifically, the support rod 232 is slidably installed with the reinforcement frame 217 and the auxiliary frame 216 , and the damper 238 is fixed to the outer wall of the rear end of the support rod 232 .

[0036] In this embodiment, the support rod 232 can be balanced and guided during the movement by the sub-frame 216 and the reinforcement frame 217.

[0037] Specifically, the main frame 211, the vertical frame 212, the horizontal frame 213, the auxiliary frame 216 and the reinforcement frame 217 are all made of hollow stainless steel pipe structures.

[0038] In this embodiment, it is not easy to rust or be corroded by other chemicals even when used in harsh environments such as outdoor for a long time; moreover, it has high strength and can withstand greater pressure and load.

[0039] Specifically, the main body component 21 further includes a mounting frame 214 fixed on the top of the front and rear upright frames 212 , and the mounting frame 214 is fixed on the frame at the bottom of the seat of the electric wheelchair 1 .

[0040] The working principle and use process of the utility model are as follows: first, when the electric wheelchair 1 needs to step onto a step or a curb, the large wheel is first moved to the edge of the curb, and then the output end of the electric telescopic rod 225 drives the lower shaft rod 224 to cooperate with the lower rotating rod 223 to drive the upper rotating rod 222 to rotate, and at the same time, the lower rotating rod 223 also drives the sub-frame 216 to flip downward through the second connecting member 218 and the reinforcement frame 217, so that the sub-frame 216 drives the telescopic assembly 23 to support the ground;

[0041] Then, the output end of the motor 236 drives the lead screw 235 to drive the slide 231 to move along the inside of the sub-frame 216, and the slide 231 drives the support wheel 234 on the axle frame 233 to contact the ground through the support rod 232; thereby lifting the large wheel of the electric wheelchair 1 upward, making it easier for the electric wheelchair 1 to step onto the curb.

[0042] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0043] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A lifting mechanism for an electric wheelchair, comprising an electric wheelchair (1), characterized in that: The electric wheelchair (1) is provided with a lifting mechanism (2) for lifting the large wheels, and the lifting mechanism (2) comprises: The main body component (21) comprises a main frame (211) arranged below the electric wheelchair (1), a vertical frame (212) fixed at four corners of the top of the main frame (211), a horizontal frame (213) fixed between the front and rear vertical frames (212), a first connecting member (215) hinged between the two ends of the main frame (211), a sub-frame (216) fixed between the bottoms of the first connecting members (215) on both sides, a reinforcement frame (217) fixed at the front end of the sub-frame (216), and second connecting members (218) fixed on both sides of the top of the reinforcement frame (217); The adjustment assembly (22) comprises an upper shaft rod (221) fixed between the rear ends of the two side cross frames (213), an upper rotating rod (222) rotatably mounted at both ends of the upper shaft rod (221), a lower rotating rod (223) pivotally connected to the lower end of the upper rotating rod (222), and the lower end of the lower rotating rod (223) is pivotally connected to the second connecting member (218), a lower shaft rod (224) fixed between the lower positions of the upper ends of the lower rotating rods (223) on both sides, and an electric telescopic rod (225) pivotally connected to the middle of the upper shaft rod (221), and the output end of the electric telescopic rod (225) is pivotally connected to the middle of the lower shaft rod (224); The telescopic assembly (23) includes a slide frame (231) slidably mounted inside the sub-frame (216).

2. The lifting mechanism for an electric wheelchair according to claim 1, characterized in that: The telescopic assembly (23) further comprises support rods (232) slidably installed on both sides of the slide (231), an axis frame (233) fixed between the lower ends of the support rods (232) on both sides, support wheels (234) rotatably installed on both sides of the axis frame (233), a lead screw (235) rotatably installed inside the auxiliary frame (216), and the lead screw (235) is threadedly connected to the slide (231), and a motor (236) is installed at the rear end of the auxiliary frame (216), and the output end of the motor (236) is connected to the lead screw (235).

3. The lifting mechanism for an electric wheelchair according to claim 2, characterized in that: The telescopic assembly (23) further comprises a cylinder (237) fixed on both sides of the rear end of the slide (231), a damper (238) installed inside the cylinder (237), and a spring (239) installed inside the cylinder (237), and the spring (239) is sleeved on the support rod (232).

4. The lifting mechanism for an electric wheelchair according to claim 3, characterized in that: The support rod (232) is slidably mounted through the reinforcement frame (217) and the auxiliary frame (216), and the damper (238) is fixed on the outer wall of the rear end of the support rod (232).

5. The lifting mechanism for an electric wheelchair according to claim 1, characterized in that: The main frame (211), the vertical frame (212), the horizontal frame (213), the auxiliary frame (216) and the reinforcement frame (217) are all made of hollow stainless steel pipe structures.

6. The lifting mechanism for an electric wheelchair according to claim 1, characterized in that: The main body component (21) further comprises a mounting frame (214) fixed on the tops of the two front and rear upright frames (212), and the mounting frame (214) is fixed on a frame at the bottom of the seat of the electric wheelchair (1).

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