Electric wheelchair frame with four wheels independently damping

Abstract

The utility model relates to the technical field of electric wheelchairs, and discloses a four-wheel independent damping electric wheelchair frame which comprises a frame, two groups of front wheel damping parts are arranged on the front side of the bottom of the frame, two groups of rear wheel damping parts are arranged on the rear side of the bottom of the frame, and each front wheel damping part comprises a connecting block and a fixed outer cylinder. A first damping shock absorber is arranged between the connecting block and the fixed outer cylinder, a front driven wheel is arranged below the fixed outer cylinder, an upper arm and a lower arm are further arranged between the connecting block and the fixed outer cylinder, the rear wheel shock absorption part comprises a dragging arm, a rotating rear driving wheel is arranged on the side, away from the center of the frame, of the dragging arm, and a second damping shock absorber is arranged between the frame and the dragging arm. The damping device is arranged on each wheel of the frame of the electric wheelchair, so that the wheels of the electric wheelchair are mutually independent, the situation that when one wheel is bumped, the other wheel can be influenced is avoided, and a certain deformation stroke is provided for the rear driving wheel by the rotationally connected dragging arm.

Description

TECHNICAL FIELD

[0001] The utility model relates to electric wheelchair technical field especially relates to a four-wheel independent damping electric wheelchair frame. BACKGROUND

[0002] The electric wheelchair frame is one of the core structures of the electric wheelchair, which supports the weight of the whole wheelchair and bears the weight of the passenger. The material and design of the frame directly affect the stability, comfort, portability and service life of the electric wheelchair. The damping system of the electric wheelchair frame can effectively absorb and disperse the vibration caused by road bumps, reducing the bumping feeling experienced by the passenger, making the riding process more stable and comfortable, which is particularly important for users who need to ride the electric wheelchair for a long time.

[0003] The existing electric wheelchair generally does not have a damping system or the damping structure of the four wheels cannot work independently, and the left and right wheels are connected by a cross beam, so when one wheel is subjected to bumps, the other wheel will also be affected, causing the left and right shaking of the whole vehicle to intensify, resulting in poor comfort. SUMMARY

[0004] In order to overcome the problem that the existing electric wheelchair does not have a damping system or the damping structure of the four wheels cannot work independently, and the top of the electric wheelchair does not have a structure to prevent the body from sliding out.

[0005] The technical scheme of the utility model is: a four-wheel independent damping electric wheelchair frame, comprising a frame, two groups of front wheel damping parts are arranged on the front side of the bottom of the frame, two groups of rear wheel damping parts are arranged on the rear side of the bottom of the frame, the two groups of front wheel damping parts are distributed in left and right mirror image, the front wheel damping part comprises a connecting block and a fixed outer cylinder, a damping shock absorber one capable of absorbing vibration is arranged between the connecting block and the fixed outer cylinder, a front driven wheel capable of rotating around the axis of the fixed outer cylinder is arranged below the fixed outer cylinder, an upper arm and a lower arm are further arranged between the connecting block and the fixed outer cylinder, one end of the upper arm and the lower arm is respectively rotatably connected to the connecting block, the other end of the upper arm and the lower arm is respectively rotatably connected to the fixed outer cylinder, the rear wheel damping part comprises a trailing arm rotatably connected to the bottom of the frame, a rear driven wheel is arranged on the side of the trailing arm away from the center of the frame, and a damping shock absorber two is arranged between the frame and the trailing arm.

[0006] As a preferred, two clamping plates one are arranged on the top of the connecting block, one end of the damping shock absorber one close to the connecting block is rotatably connected between the two clamping plates one, two clamping plates two are arranged on the bottom of the lower arm, and the other end of the damping shock absorber one away from the connecting block is rotatably connected between the two clamping plates two.

[0007] As a preferred, an avoiding hole one for avoiding the damping shock absorber one is arranged on the upper arm, and an avoiding hole two for avoiding the damping shock absorber one is arranged on the lower arm.

[0008] As preferred, the axis of the damping shock absorber one of the two front wheel shock absorbing parts is at an angle a.

[0009] As preferred, the frame bottom is provided with two clamping plates three on the left and right sides respectively, the top of the trailing arm is provided with two clamping plates four, the damping shock absorber two of the left rear wheel shock absorbing part is rotatably connected between the two clamping plates three on the left side and close to the frame, and the damping shock absorber two of the right rear wheel shock absorbing part is rotatably connected between the two clamping plates three on the right side and close to the frame.

[0010] As preferred, the bottom of the frame is provided with a fixed block corresponding to the rear side of the front wheel shock absorbing part, the trailing arm is provided with an upwardly protruding pull plate, two pull rods two are arranged on the front side of the fixed block and are parallel to each other, one end of the pull rod two is rotatably connected to the fixed block, the other end of the pull rod two is rotatably connected to the pull plate on the trailing arm of the right rear wheel shock absorbing part, and two pull rods one are arranged on the rear side of the fixed block and are parallel to each other, one end of the pull rod one is rotatably connected to the fixed block, and the other end of the pull rod one is rotatably connected to the pull plate on the trailing arm of the left rear wheel shock absorbing part.

[0011] As preferred, the trailing arm can extend rearward beyond the area of the frame mapped on the ground, and the rear side of the trailing arm is rotatably connected with an anti-toppling wheel.

[0012] The electric wheelchair frame has the advantages that the damping device is arranged for each wheel of the electric wheelchair frame, so that each wheel of the electric wheelchair is independent, when one wheel is subjected to bumping, the other wheel will not be affected, so that the overall left-right shaking is not intensified, and the comfort is improved. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 It is a whole structure schematic view of the utility model;

[0014] Figure 2 It is a structure schematic view of the avoiding hole one of the utility model;

[0015] Figure 3 It is a structure schematic view of the pull plate of the utility model;

[0016] Figure 4 It is a structure schematic view of the fixed block of the utility model;

[0017] Figure 5 It is a structure schematic view of the lower arm of the utility model;

[0018] Figure 6 It is a structure schematic view of the frame of the utility model.

[0019] Explanation of reference signs: 1, front driven wheel; 101, fixed outer cylinder; 11, damping shock absorber one; 121, upper arm; 1211, avoidance hole one; 122, lower arm; 1221, avoidance hole two; 1222, clamping plate two; 13, connecting block; 131, clamping plate one; 2, rear driven wheel; 21, damping shock absorber two; 3, anti-toppling wheel; 4, frame; 41, clamping plate three; 42, trailing arm; 421, pull plate; 43, fixed block; 51, pull rod one; 52, pull rod two. DETAILED DESCRIPTION

[0020] The utility model will be further explained below in combination with the drawings and examples.

[0021] Please refer to Figure 1 - Figure 5The utility model provides an embodiment: a four-wheel independent damping electric wheelchair frame, including frame 4, the front side of frame 4 bottom is equipped with two groups of front wheel damping parts, the rear side of frame 4 bottom is equipped with two groups of rear wheel damping parts, two groups of front wheel damping parts are left and right mirror image distribution, and the front wheel damping part includes connecting block 13 and fixed outer tube 101, and the damping shock absorber one 11 that can absorb vibration is equipped between connecting block 13 and fixed outer tube 101, the lower of fixed outer tube 101 is equipped with the front driven wheel 1 that can rotate around fixed outer tube 101 axis, still be equipped with upper arm 121, lower arm 122 between connecting block 13 and fixed outer tube 101, one end of upper arm 121 and lower arm 122 is respectively rotationally connected to connecting block 13, the other end of upper arm 121 and lower arm 122 is respectively rotationally connected to fixed outer tube 101, and the rear wheel damping part includes the trailing arm 42 that is rotationally connected with the bottom of frame 4, the side of trailing arm 42 away from the center of frame 4 is equipped with the rotation of rear drive wheel 2, and the damping shock absorber two 21 is equipped between frame 4 and trailing arm 42, by setting damping device for each wheel of electric wheelchair frame, make each wheel of electric wheelchair independent, avoid when a wheel is subjected to jolt, another wheel will also be influenced, thereby leading to the aggravation of overall left and right shaking, reduce comfort, the front side of frame 4 is inclined upward, facilitate human body to lean back to the rear side, reduce the risk of human body in the encounter emergency stop and rush forward, connecting block 13 top is equipped with two clamping plates one 131, and the end of damping shock absorber one 11 close to connecting block 13 is rotationally connected between two clamping plates one 131, and the bottom of lower arm 122 is equipped with two clamping plates two 1222, and the end of damping shock absorber one 11 away from connecting block 13 is rotationally connected to between two clamping plates two 1222, by the connection of two clamping plates one 131 and two clamping plates two 1222 to damping shock absorber one 11, facilitate forming a whole, make damping shock absorber one 11 convenient for absorbing the vibration of front driven wheel 1, upper arm 121 is equipped with the avoiding hole one 1211 of avoiding damping shock absorber one 11, and lower arm 122 is equipped with the avoiding hole two 1221 of avoiding damping shock absorber one 11, by damping shock absorber one 11 passing through avoiding hole one 1211 and avoiding hole two 1221, make the pulling stress of lower arm 122 and upper arm 121 even, and the axis of two front wheel damping parts damping shock absorber one 11 is angle a, by the damping shock absorber one 11 of two front wheel damping parts forming angle a, increase the stability of two front wheel damping parts, increase the risk of bearing impact.

[0022] Please refer to Figure 2 Figure 5 ​In the embodiment, the left and right sides of the bottom of the frame 4 are respectively provided with two clamping plates three 41, the top of the trailing arm 42 is provided with two clamping plates four, the left two clamping plates three 41 are respectively rotationally connected to the one end of the damping shock absorber two 21 of the left rear wheel damping part close to the frame 4, the right two clamping plates three 41 are respectively rotationally connected to the one end of the damping shock absorber two 21 of the right rear wheel damping part close to the frame 4, the damping shock absorber two 21 between the trailing arm 42 and the frame 4 makes the rear drive wheel 2 have a certain elasticity of up and down movement, reduces the transmission of vibration, the bottom of the frame 4 is provided with a fixed block 43 corresponding to the rear side of the front wheel damping part, the trailing arm 42 is provided with an upwardly protruding pull plate 421, the front side of the fixed block 43 is provided with two parallel pull rods two 52, one end of the pull rod two 52 is rotationally connected to the fixed block 43, the other end of the pull rod two 52 is rotationally connected to the pull plate 421 on the trailing arm 42 of the right rear wheel damping part, the rear side of the fixed block 43 is provided with two parallel pull rods one 51, one end of the pull rod one 51 is rotationally connected to the fixed block 43, the other end of the pull rod one 51 is rotationally connected to the pull plate 421 on the trailing arm 42 of the left rear wheel damping part, the pull rod one 51 and the pull rod two 52 are used for pulling and limiting the rear drive wheel 2, preventing the rear drive wheel 2 from being damaged due to tilting, and prolonging the service life, the trailing arm 42 can extend beyond the area of the frame 4 mapped on the ground, the rear side of the trailing arm 42 is rotationally connected with the anti-toppling wheel 3, and the anti-toppling wheel 3 at the rear side of the trailing arm 42 prevents the four-wheel independent damping electric wheelchair frame from overturning due to high center of gravity when climbing a slope.

[0023] Please refer to Figure 3 , one end of the pull rod one 51 is connected to the pull plate 421 on the trailing arm 42 of the right rear wheel damping part, and the other end of the pull rod one 51 is connected to the one end of the fixed block 43 away from the right rear wheel on the rear side, so that the length of the pull rod one 51 is increased, and the right rear drive wheel 2 has a larger up and down movement space, and if the other end of the pull rod one 51 is connected to the one end of the fixed block 43 close to the right rear wheel on the rear side, it also falls within the protection scope of the patent.

[0024] Please refer to Figure 4 , one end of the pull rod two 52 is connected to the pull plate 421 on the trailing arm 42 of the left rear wheel damping part, and the other end of the pull rod two 52 is connected to the one end of the fixed block 43 away from the left rear wheel on the front side, so that the length of the pull rod two 52 is increased, and the left rear drive wheel 2 has a larger up and down movement space, and if the other end of the pull rod two 52 is connected to the one end of the fixed block 43 close to the left rear wheel on the front side, it also falls within the protection scope of the patent.

[0025] When working, the damping shock absorber 11, the upper arm 121 and the lower arm 122 support the fixed outer cylinder 101, preventing the upper arm 121 from colliding with the frame 4 and causing interference and unable to form a damping structure. When the front wheel damping part faces the vibration caused by the bump, the front driven wheel 1 absorbs the vibration and transmits it upward. The area close to the front side of the upper arm 121 and the lower arm 122 moves upward. The damping shock absorber 11 absorbs the vibration caused by the bump and slows down the transmission of vibration to the frame 4. The trailing arm 42 and the damping shock absorber 21 support the rear driven wheel 2 and press it downward. When the rear driven wheel 2 faces the vibration caused by the bump, the damping shock absorber 21 can absorb the transmission of vibration, and the trailing arm 42 and the frame 4 will only produce a certain rotation. The pull rod 51 and the pull rod 52 pull different trailing arms 42, reducing the possibility of left and right shaking of the rear driven wheel 2. The rear driven wheel 2 is located at the bottom of the frame 4 and is provided with a driving motor. The inside of the frame 4 is also provided with an area for placing the power supply. The rotating connection inside the vehicle frame is connected in the form of shaft hole rotation. A bearing is also provided between the shaft and the hole. This rotating connection method is a prior art. At the same time, the damping shock absorber 21, the damping shock absorber 11, the pull rod 51, the pull rod 52, the driving motor and the corresponding circuit are all prior art, and their working principles will not be repeated here. The relative rotation between the fixed outer cylinder 101 and the front driven wheel 1 also needs the cooperation of the bearing rotating column. The structure and method of relative rotation are mastered by those skilled in the art.

[0026] Through the above steps, a damping device is provided for each wheel of the electric wheelchair frame, so that each wheel of the electric wheelchair is independent of each other. When one wheel is affected by a bump, the other wheel will also be affected, which will cause the overall left and right shaking to intensify, reducing comfort. To solve the problem that the existing electric wheelchair does not have a damping system or the damping structure of the four wheels cannot work independently.

Claims

1. A four-wheel independently-sprung electrically-powered wheelchair frame, characterized by: The frame (4) is provided with two groups of front wheel damping parts on the front side of the bottom, two groups of rear wheel damping parts on the rear side of the bottom, and the two groups of front wheel damping parts are distributed in left and right mirror images, the front wheel damping part comprises a connecting block (13) and a fixed outer cylinder (101), a damping shock absorber (11) capable of absorbing vibration is arranged between the connecting block (13) and the fixed outer cylinder (101), a front driven wheel (1) capable of rotating around the axis of the fixed outer cylinder (101) is arranged below the fixed outer cylinder (101), an upper arm (121) and a lower arm (122) are further arranged between the connecting block (13) and the fixed outer cylinder (101), one end of the upper arm (121) and the lower arm (122) is respectively rotatably connected to the connecting block (13), and the other end of the upper arm (121) and the lower arm (122) is respectively rotatably connected to the fixed outer cylinder (101), the rear wheel damping part comprises a trailing arm (42) rotatably connected to the bottom of the frame (4), a rear driven wheel (2) rotatably arranged on the side of the trailing arm (42) away from the center of the frame (4), and a damping shock absorber (21) arranged between the frame (4) and the trailing arm (42).

2. The four-wheel independent suspension electric wheelchair frame according to claim 1, characterized in that: Two clamping plates (131) are arranged on the top of the connecting block (13), one end of the damping shock absorber (11) close to the connecting block (13) is rotatably connected between the two clamping plates (131), and two clamping plates (1222) are arranged on the bottom of the lower arm (122), and the other end of the damping shock absorber (11) away from the connecting block (13) is rotatably connected between the two clamping plates (1222).

3. The four-wheel independent suspension electric wheelchair frame according to claim 2, characterized in that: An avoiding hole (1211) for avoiding the damping shock absorber (11) is arranged on the upper arm (121), and an avoiding hole (1221) for avoiding the damping shock absorber (11) is arranged on the lower arm (122).

4. The four-wheel independent suspension electric wheelchair frame according to claim 3, characterized in that: The axes of the damping shock absorbers (11) of the two front wheel damping parts have an included angle a.

5. The four-wheel independent suspension electric wheelchair frame according to claim 4, characterized in that: Two clamping plates (41) are arranged on the left and right sides of the bottom of the frame (4), two clamping plates (41) are arranged on the top of the trailing arm (42), one end of the damping shock absorber (21) of the left rear wheel damping part close to the frame (4) is rotatably connected between the two clamping plates (41) on the left side, and one end of the damping shock absorber (21) of the right rear wheel damping part close to the frame (4) is rotatably connected between the two clamping plates (41) on the right side.

6. The four-wheel independent suspension electric wheelchair frame of claim 5, wherein: A fixed block (43) is arranged on the bottom of the frame (4) corresponding to the rear side of the front wheel damping part, an upwardly protruding pull plate (421) is arranged on the trailing arm (42), two parallel pull rods (52) are arranged on the front side of the fixed block (43), one end of the pull rod (52) is rotatably connected to the fixed block (43), the other end of the pull rod (52) is rotatably connected to the pull plate (421) on the trailing arm (42) of the right rear wheel damping part, two parallel pull rods (51) are arranged on the rear side of the fixed block (43), one end of the pull rod (51) is rotatably connected to the fixed block (43), and the other end of the pull rod (51) is rotatably connected to the pull plate (421) on the trailing arm (42) of the left rear wheel damping part.

7. The four-wheel independent suspension electric wheelchair frame according to claim 6, characterized in that: The trailing arm (42) can extend rearward beyond the area of the frame (4) mapped on the ground, and the trailing arm (42) is rotatably connected with the anti-toppling wheel (3) at the rear side.

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