TW202037354A - Electric wheelchair with respective pivoting front cantilever and power frame and elastically linked to a frame - Google Patents

Abstract

An electric wheelchair with respective pivoting front cantilever and power frame and elastically linked to a frame, which includes a frame, two leading units, two power units, two anti-tilting units, two first, second and third shock absorption units, front cantilevers of the leading units and power frames of the power units are pivoted to the frame, when a leading wheel rises by an obstacle, the front cantilever pivot an angle, through the first shock absorption units to produce elastic buffer pressure to the power frame, so as to force the power source and the power wheel at the same time, improve the downwardly grip force of the power wheel, the power frame is pressed to the frame by a strain unit, which makes the frame move in the same direction, so as to increase the stability of the frame, improving the safety and comfort of the electric wheelchair when it crosses the obstacle.

Description

Electric wheelchair with respective pivoting front cantilever and power frame, which are mutually elastically linked with the frame

The present invention is related to electric wheelchairs, in particular to an electric wheelchair with respective pivoting front cantilever and power frame, which are mutually elastically linked with the frame.

Electric wheelchairs are a necessary means of transportation for the elderly or people with limited mobility. As the general road surface has obstacles such as high and low undulations, bumps, etc., such as stairs or protruding roads, current electric wheelchairs have the ability to overcome the above obstacles. Therefore, the safety and comfort of electric wheelchairs when crossing the above obstacles are extremely important.

Referring to Fig. 1, there is shown an electric wheelchair of US 9,913,768, which mainly fixes the front cantilever 111 of the front guide unit 11 on the frame 12, and the frame 12 and the rear cantilever 131 of the anti-roll unit 13 are pivoted together. And there is a shock-absorbing unit 14 between the frame 12 and the rear cantilever 131, and the power unit 15 is fixed on the rear cantilever 131. Therefore, when the front guide wheel 112 of the front guide unit 11 encounters obstacles and rises, the The front cantilever 111 and the frame 12 will rise at the same time and pivot at an angle relative to the rear cantilever 131. At this time, the pivoting frame 12 will be pressed against the rear cantilever 131 by the suspension unit 14 to avoid the rear cantilever 131 and The power unit 15 on it rises to ensure the safety of the electric wheelchair when surmounting the above-mentioned obstacles.

However, because the front cantilever 111 is fixed on the frame 12, so that the two are integrally connected, generally speaking, the seat (not shown in the figure) is fixed on the frame 12, so when the When the front guide wheel 112 encounters an obstacle and rises, the front cantilever 111, the frame 12 and the seat will also rise at the same time, which will affect the comfort of the user on the seat and increase the user's fear of passing the obstacle.

Secondly, when the front guide wheel 112 encounters an obstacle and rises, the front cantilever 111 and the frame 12 will pivot at an angle relative to the rear cantilever 131. At this time, the pivoting frame 12 will use the suspension unit 14 Pressing the rear cantilever 131 can also prevent the power unit 15 from rising and losing its grip. Therefore, when the electric wheelchair is over obstacles, restraining the power unit 15 from rising is too indirect and unreliable. The defect of insufficient security.

The purpose of the present invention is to provide an electric wheelchair with respective pivoting front cantilever and power frame, which are mutually elastically linked with the frame, mainly to improve the safety and comfort of the electric wheelchair when crossing obstacles.

In order to achieve the foregoing objective, according to the present invention, there is provided an electric wheelchair with respective pivoting front cantilever and power frame, which are elastically linked with the frame, including: a frame, a front frame portion, and a rear frame Part and two frame linkage parts between the front and rear frame parts; two front guide units are pivoted on both sides of the frame, and each has a front cantilever and a rotatably arranged on the front cantilever The front guide wheel, wherein the front cantilever has a front cantilever pivot part pivoted on the front frame part; two power units are pivoted on both sides of the frame respectively, and each has a power frame and a power frame fixed on the power frame The power source of and a power wheel driven by the power source, wherein the power frame has a power frame pivot part pivoted on the front frame part; two anti-roll units are pivoted on the rear frame part; The first shock-absorbing unit is respectively arranged between the front cantilever and the power frame; the two strain units are respectively arranged between the power frame and the frame linkage part; and the two second shock-absorbing units are respectively arranged on the frame Between the linkage part and the anti-tilt unit; Thereby, the pivotal torsion generated by the front cantilever is transmitted to the power frame through the first suspension unit, and the pivotal torsion generated by the power frame is transmitted to the frame through the strain unit. Therefore, when the electric wheelchair crosses When an obstacle occurs, the front guide wheel is raised by the obstacle, and the front cantilever pivots at an angle with the pivot of the front cantilever as the center. The first shock absorber unit generates elastic cushioning force on the power frame to make the power on the power frame The power source and the power wheel are stressed at the same time to improve the downward grip of the power wheel, and the power frame is pressed to the frame linkage part by the strain unit, so that the frame is displaced in the same direction, which increases the stability of the frame and achieves The purpose of improving the safety and comfort of the electric wheelchair when crossing obstacles.

Preferably, the front cantilever pivot of each of the front cantilevers has a first pivot center, the power frame pivot of each of the power frames has a second pivot center, each of the power wheels has a rolling center, and the The rolling center is higher than the first and second pivot centers, and the connection between the first shock-absorbing unit and the power frame is higher than the rolling center. As a result, the amount of down force generated on the power wheels and the frame when the front guide wheel is raised is more certain.

Preferably, the front cantilever pivot of the front cantilever and the power frame pivot of the power frame are coaxially or coaxially arranged on the front frame part.

Preferably, each of the power frames further has a power frame fixing portion and a power frame extension portion connected to the power frame fixing portion, each of the power sources is fixed to the power frame fixing portion, and each of the first avoidance The vibration units are respectively arranged between the front cantilever and the extension of the power frame; the strain units are respectively arranged between the extension of the power frame and the linkage part of the frame.

Preferably, each of the strain units is a rubber block. Thereby, the power transmission of the power frame to the frame is made more linear, so as to improve the stability and comfort of the electric wheelchair when surmounting obstacles.

Preferably, each of the strain units includes an adjustable screw and a rubber block fixed on the adjustable screw, and the adjustable screw can be arranged on the power frame away from or close to the direction of the linkage part of the frame, The rubber block is fixed on the adjustable screw and abuts against the linkage part of the frame. Therefore, the sensitivity of the power frame's power transmission to the frame can be adjusted to improve the stability and comfort of the electric wheelchair when surmounting obstacles.

Preferably, each of the first and second shock-absorbing units and each of the strain units are shock absorbers.

Preferably, each of the anti-tilt units includes a rear cantilever and an anti-roll wheel rotatably arranged on the rear cantilever, wherein the rear cantilever has a rear cantilever pivot part pivoted on the rear frame part, each The second shock-absorbing unit is respectively arranged between the frame linkage part and the rear cantilever pivot part.

Preferably, the frame further has two lower protrusions arranged on both sides of the front frame portion, and the front cantilever also has an upper protrusion corresponding to the lower protrusion. This prevents the front guide wheel from contacting the plane when the electric wheelchair is on a plane. More preferably, it further includes an adjusting member, which is arranged on the lower convex portion so as to be liftable and has an adjusting end portion that supports the upper convex portion. In this way, the distance between the front guide wheel and the plane can be adjusted to regulate the height of the electric wheelchair over obstacles.

Regarding the technology, means and other effects used by the present invention to achieve the above-mentioned objects, three preferred and feasible embodiments are described in detail below in conjunction with the drawings.

Referring to Figures 2 to 6, the first embodiment of the present invention provides an electric wheelchair with respective pivoting front cantilever and power frame and elastically linked with the frame, which is mainly composed of a frame 20 and two front guides. Unit 30, two power units 40, two anti-tilt units 50, two first suspension units 60, two strain units 70, and two second suspension units 80 are composed of:

The frame 20 is composed of a plurality of rods, and has a front frame portion 21, a rear frame portion 22, and two frame linkage portions 23 located between the front and rear frame portions 21 and 22; In this embodiment, as shown in FIG. 2, the frame 21 is provided with a tube 24 for assembling a seat 25; in addition, as shown in FIG. 7, the frame 20 also has two frames mounted on the front frame The lower convex portions 26 on both sides of the portion 21.

The two front guide units 30 are respectively pivoted on both sides of the frame 20, and each has a front cantilever 31 and a front guide wheel 32 rotatably provided on the front cantilever 31, wherein the front cantilever 31 has a pivot The front cantilever pivot portion 311 of the front frame portion 21; in this embodiment, referring to FIG. 7, the front cantilever 31 also has an upper protrusion 312 corresponding to the lower protrusion 26, so as to avoid the When the electric wheelchair is on a plane, the front guide wheel 32 is in contact with the plane, and its state is shown in FIG. 5.

The two power units 40 are respectively pivoted on both sides of the frame 20, and each has a power frame 41, a power source 42 fixed to the power frame 41, and a power wheel 43 driven by the power source 42 The power frame 41 has a power frame pivot portion 411 pivoted on the front frame portion 21, a power frame fixing portion 412 connected to the power frame pivot portion 411, and a power frame fixing portion 412 connected to and aligned A power frame extension part 413 is formed at a distance corresponding to the frame linkage part 23, wherein the power source 42 is a motor and is fixed on the power frame fixing part 412.

The two anti-tilt units 50 are respectively pivoted on the rear frame portion 22; in this embodiment, each of the anti-tilt units 50 includes a rear cantilever 51 and an anti-roll wheel 52 rotatably arranged on the rear cantilever 51 , Wherein the rear cantilever 51 has a rear cantilever pivot portion 511 pivoted on the rear frame portion 22.

The two first suspension units 60 are respectively arranged between the front cantilever 31 and the power frame 41; in this embodiment, each of the first suspension units 60 is a shock absorber with a compression spring, and the first suspension One end 61 of the shock unit 60 is assembled on one side of the power frame extension 413, and the other end 62 of the first shock absorber unit 60 is blocked on the front cantilever 31 and located at the front guide wheel 32 and the pivot of the front cantilever Between 311.

The two strain units 70 are respectively arranged between the power frame extension 413 and the frame linkage portion 23; in this embodiment, each of the strain units 70 includes an adjustable screw 71 and an adjustable screw 71, the adjustable screw 71 can be arranged on the power frame extension 413 away from or close to the direction of the frame linkage 23, and the rubber block 72 is fixed on the adjustable screw 71 and abuts against The frame linkage portion 23; of course, in other embodiments, the strain unit 70 can be achieved simply by rubber blocks.

Two of the second shock-absorbing units 80 are respectively arranged between the frame linkage 23 and the anti-roll unit 50; in this embodiment, each of the second shock-absorbing units 80 is a shock absorber with a compression spring, and the One end 81 of the second suspension unit 80 is assembled on the frame linkage 23, and the other end 82 of the second suspension unit 80 is blocked on the rear cantilever 51 and located between the anti-roll wheel 52 and the rear cantilever pivot Between 511.

Thereby, the pivotal torsion generated by the front cantilever is transmitted to the power frame through the first suspension unit, the pivotal torsion generated by the power frame is transmitted to the frame through the strain unit, and the pivot generated by the frame The rotational torque is transmitted to the anti-roll unit through the second shock-absorbing unit.

The above is the description of the structure and configuration of the main components of the first embodiment of the present invention. As for the operation mode and effect of the first embodiment of the present invention, the description is as follows.

Referring to Figures 5, 6 and 8, when the electric wheelchair crosses an obstacle, the front guide wheel 32 is blocked by the obstacle and rises, and the front cantilever 31 pivots clockwise by an angle with the front cantilever pivot 311 as the center. At this time, the front cantilever 31 that pivots by an angle presses up against the first suspension unit 60, and transmits the generated pivoting torsion force through the first suspension unit 60 to the power frame 41, and then the power The frame 41 generates elastic cushioning force, and the power frame 41 pivots clockwise at an angle with the power frame pivot 411 as the center, so that the power source 42 on the power frame 41 and the power wheels 43 are stressed at the same time, thereby improving The power wheel 43 has downward grip. At the same time, the power frame 41 is pressed against the frame linkage part 23 by the strain unit 70, so that the frame 20 is displaced and compressed in the same direction, which increases the stability of the frame 20 and improves the safety of the electric wheelchair when surmounting obstacles. With the purpose of comfort.

It can be seen that when the front guide wheel 32 encounters obstacles and rises, the front cantilever 31 will not rise together with the frame 20 and the seat 25 at the same time. Instead, the center of gravity of the frame 20 will drop slightly, thus effectively avoiding the seat The user's sense of discomfort is generated on 25, while reducing the user's fear of passing obstacles. Secondly, when the front guide wheel 32 encounters obstacles and rises, the front cantilever 31 directly transmits the pivotal torque to the power frame 41 through the first shock absorber unit 60, so that the power source 42 on the power frame 41 and the power The wheels 43 receive force at the same time, so as to improve the downward grip of the power wheels 43, restrain the power unit 40 from rising directly and reliably, and effectively improve the safety when crossing obstacles.

It is worth noting that in this embodiment, the strain unit 70 is a block made of rubber material. Therefore, when the strain unit 70, which is a rubber block 72, is provided between the power frame extension 413 and the frame linkage 23 , It has the characteristics of small deformation, so as to reduce the shaking degree of the power frame 41 and the frame 20, and increase the stability of the electric wheelchair when crossing obstacles. On the other hand, in this embodiment, the strain unit 70, which is a rubber block 72, is used as the power transmission medium between the power frame 41 and the frame 20, which can greatly reduce the generation between the power frame 41 and the frame 20. The strange sound.

It is worth noting that, referring to FIG. 5, in this embodiment, the front cantilever pivot portion 311 of each front cantilever 31 has a first pivot center C1, and the power frame pivot portion 411 of each power frame 41 has a first pivot center C1. Two pivot centers C2, each of the power wheels 43 has a rolling center C3, and the rolling center C3 is higher than the first and second pivot centers C1, C2, and the first suspension unit 60 and the power frame extension The connection point C4 of the 413 is higher than the rolling center C3, so that the amount of down force generated on the power wheel 43 and the frame 20 when the front guide wheel encounters an obstacle and rises is more certain.

Of course, in the process of displacement and compression of the frame 20, the pivoting torque generated by the second shock absorber unit 80 is also transmitted to the anti-roll unit 50, so that the anti-roll wheel 43 is compressed simultaneously, thereby Improve the downward grip of the anti-roll wheel 43, effectively increase the stability of the frame 20, and improve the safety and comfort of the electric wheelchair when surmounting obstacles.

In addition, referring to FIG. 9, since the adjustable screw 71 of each strain unit 70 can be arranged at the power frame extension part 413 far away or close to the direction of the frame linkage part 23, and the rubber block 72 is fixed at The adjustable screw 71 abuts on the frame linkage portion 23, so the adjustable screw 71 can be rotated as required to adjust the elastic coefficient of the rubber block 72, thereby regulating the power transmission of the power frame 41 to the frame 20 sensitivity to adjust the stability and comfort of the electric wheelchair when crossing obstacles.

Secondly, referring back to Figures 6 and 7, since the front cantilever 31 has an upper protrusion 312 corresponding to the lower protrusion 26 of the frame 20, it prevents the front guide wheel 32 from interacting with the plane when the electric wheelchair is on a plane. contact. However, the present embodiment further includes an adjusting member 91 which can be lifted and lowered on the lower convex portion 26 and has an adjusting end portion 911 that supports the upper convex portion 312. In order to adjust the height of the front guide wheel 32 from the plane, the height of the electric wheelchair over obstacles can be adjusted.

Referring to FIG. 10, the second embodiment of the present invention provides an electric wheelchair with respective pivoting front cantilever and power frame and elastically linked with the frame. It is also composed of a frame 20, a front guide unit 30, and a power frame. The unit 40, the anti-tilt unit 50, the first shock-absorbing unit 60, the strain unit, and the second shock-absorbing unit 80 are composed. The second embodiment is different from the first embodiment in:

The front cantilever pivot portion 311 of the front cantilever 31 and the power frame pivot portion 411 of the power frame 41 are coaxially provided on the front frame portion 21. In this way, the length of the frame 20 along the traveling direction can be shortened to meet the needs of users.

Referring to Fig. 11, the third embodiment of the present invention provides an electric wheelchair with respective pivoting front cantilever and power frame and elastically linked with the frame. The third embodiment differs from the first embodiment in:

Each strain unit 70 is a shock absorber with a compression spring, and one end 73 of the strain unit 70 is assembled on the power frame extension 413, and the other end 74 of the strain unit 70 is assembled on the frame linkage 23 .

[Learning] 11: Leading unit 111: front cantilever 112: Front guide wheel 12: Frame 13: Anti-tilt unit 131: rear cantilever 14: Suspension unit 15: Power unit [this invention] 20: Frame 21: Front frame 22: Rear frame 23: Frame linkage 24: seat tube 25: Seat 26: Lower convex 30: Leading unit 31: Front cantilever 311: Front cantilever pivot 312: Upper convex 32: Front guide wheel 40: power unit 41: Power frame 411: Power Frame Pivot 412: Power frame fixed part 413: Power Frame Extension 42: power source 43: power wheel 50: Anti-tilt unit 51: rear cantilever 511: Rear cantilever pivot 52: Anti-roll wheel 60: The first suspension unit 61: End 62: The other end 70: strain unit 71: Adjustable screw 72: rubber block 73: End 74: The other end 80: Second suspension unit 81: End 82: The other end 91: adjustment piece 911: Adjust the end

Figure 1 is a diagram of an electric wheelchair in US 9,913,768 B2; Figure 2 is an overall appearance view of the first embodiment of the present invention, showing a state where the seat is provided; Figure 3 is a perspective view of the first embodiment of the present invention; Figure 4 is a top view of the first embodiment of the present invention; Figure 5 is a side view of the first embodiment of the present invention; Figure 6 is a partial perspective view of the first embodiment of the present invention; Figure 7 is a partial cross-sectional view of the first embodiment of the present invention, showing the state of the front cantilever against the frame; Figure 8 is a side view of the first embodiment of the present invention, showing the state of the electric wheelchair when crossing obstacles; Figure 9 is a partial enlarged view of the first embodiment of the present invention, showing a state where the strain unit is adjustable; Figure 10 is a bottom view of the second embodiment of the present invention, showing a state where the front cantilever and the power frame are coaxially arranged on the frame; and Fig. 11 is a partial enlarged view of the third embodiment of the present invention, showing a state where the strain unit is a shock absorber.

20: Frame

21: Front frame

22: Rear frame

23: Frame linkage

26: Lower convex

30: Leading unit

31: Front cantilever

311: Front cantilever pivot

312: Upper convex

32: Front guide wheel

40: power unit

41: Power frame

411: Power Frame Pivot

412: Power frame fixed part

413: Power Frame Extension

42: power source

43: power wheel

50: Anti-tilt unit

51: rear cantilever

511: Rear cantilever pivot

52: Anti-roll wheel

60: The first suspension unit

61: End

62: The other end

70: strain unit

71: Adjustable screw

72: rubber block

80: Second suspension unit

81: End

82: The other end

Claims (10)

An electric wheelchair with respective pivoting front cantilever and power frame and elastically linked with the frame, comprising: A frame having a front frame part, a rear frame part, and two frame linkage parts located between the front and rear frame parts; Two front guide units are pivoted on both sides of the frame, and each has a front cantilever and a front guide wheel rotatably arranged on the front cantilever, wherein the front cantilever has a front cantilever pivoted on the front frame part Cantilever pivot Two power units are pivoted on both sides of the frame, and each has a power frame, a power source fixed to the power frame, and a power wheel driven by the power source, wherein the power frame has a pivot The power frame pivot of the front frame; Two anti-tilt units, respectively pivoted on the rear frame; Two first shock-absorbing units are respectively arranged between the front cantilever and the power frame; Two strain units are respectively arranged between the power frame and the frame linkage part; and Two second shock-absorbing units are respectively arranged between the linkage part of the frame and the anti-roll unit; Thereby, the pivotal torsion generated by the front cantilever is transmitted to the power frame through the first suspension unit, and the pivotal torsion generated by the power frame is transmitted to the frame through the strain unit. The electric wheelchair having respective pivoting front cantilevers and power frames that are mutually elastically linked with the frame as described in claim 1, wherein the front cantilever pivot of each front cantilever has a first pivot center, and each power frame The pivot of the power frame has a second pivot center, each of the power wheels has a rolling center, and the rolling center is higher than the first and second pivot centers, the connection between the first shock-absorbing unit and the power frame Is higher than the rolling center. The electric wheelchair with respective pivoting front cantilever and power frame that are mutually elastically linked with the frame as described in claim 1, wherein the front cantilever pivot of the front cantilever and the power frame pivot of the power frame are coaxial or different The axle is provided on the front frame part. The electric wheelchair with respective pivoting front cantilever and power frame that are mutually elastically linked with the frame as described in claim 1, wherein each power frame further has a power frame fixing part and a power connecting the power frame fixing part Each of the power sources is fixed to the fixed portion of the power frame, each of the first shock-absorbing units is respectively arranged between the front cantilever and the extension of the power frame; each of the strain units is respectively arranged on the Between the extension part of the power frame and the linkage part of the frame. According to claim 1, the electric wheelchair having respective pivoting front cantilevers and power frame and elastically linked with the frame, wherein each strain unit is a rubber block. The electric wheelchair with respective pivoting front cantilever and power frame and elastically linked with the frame as described in claim 1, wherein each of the strain units includes an adjustable screw and a rubber fixed on the adjustable screw The adjustable screw can be arranged on the power frame away from or close to the direction of the linkage part of the frame, and the rubber block is fastened to the adjustable screw and abuts against the linkage part of the frame. According to claim 1, the electric wheelchair having respective pivoting front cantilevers and power frame and elastically linked with the frame, wherein each of the first and second shock-absorbing units and the strain unit are shock absorbers. The electric wheelchair with respective pivoting front cantilever and power frame that are mutually elastically linked with the frame as described in claim 1, wherein each of the anti-tilt units includes a rear cantilever and an anti-cantilever rotatably provided on the rear cantilever The tilt wheel, wherein the rear cantilever has a rear cantilever pivot part pivoted on the rear frame part, and each of the second shock-absorbing units is respectively arranged between the frame linkage part and the rear cantilever pivot part. According to claim 1, the electric wheelchair having the front cantilever and the power frame that respectively pivot and is mutually elastically linked with the frame, wherein the frame further has two lower protrusions provided on both sides of the front frame part, two The front cantilever also has an upper protrusion corresponding to the lower protrusion. According to claim 9, the electric wheelchair with respective pivoting front cantilever and power frame, which are mutually elastically linked with the frame, further includes an adjusting member that can be raised and lowered on the lower convex portion and has An adjustment end holding the upper convex part.

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