JP3233742U - Electric wheelchair frame - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a frame of an electric wheelchair capable of effectively achieving a cushioning effect to improve running comfort and effectively avoiding overturning of the frame.
A first fixing portion and a second fixing portion are installed on a frame main body 1. The connecting rod wheel group includes a first connecting rod 3 and a second connecting rod 4, the first connecting rod is oscillatingly installed in the first fixing portion, and the second connecting rod is the second. A swingable installation is made on the fixed portion, a first guide wheel 21 is installed on the first connecting rod, a second guide wheel 22 is installed on the second connecting rod, and the first connecting rod is the second. Assembled so that it can be moved with the connecting rod. The drive device 5 includes a connecting seat, a power device and a drive wheel, the connecting seat is pivotally attached to the first connecting rod, the power device is fixed to the connecting seat, and the driving wheel is It is power-connected to the power unit, and the pivotal axis direction of the connecting seat is parallel to the rotation axis direction of the drive wheels.
[Selection diagram] Fig. 1

Description

The present invention relates to a frame of an electric wheelchair.

Conventionally, when the electric wheelchair travels on uneven ground, it can effectively adhere to the ground and climb or descend the slope. Therefore, the frame of the conventional electric wheelchair has a front guide wheel group and a drive device from front to rear. And the rear guide wheel group are sequentially installed, the front guide wheel group and the drive device are installed at both front and rear ends of the first connecting rod, respectively, and the first connecting rod is swingable with respect to the frame and climbs a slope. Alternatively, when descending a slope, the first connecting rod swings to swing the front guide wheel group and the drive device up and down like a seesaw, so that the drive device and the front guide wheel group can both swing. It can abut on the ground with a slope or height difference.

However, when the drive wheels of the frame of a conventional electric wheelchair encounter a height difference, when the impact force of the ground is received, the force may be transmitted to the frame to vibrate the frame, which makes the user uncomfortable. It is easy to cause damage or dizziness, and there is a risk of overturning when the frame vibrates violently, and there are drawbacks that need to be improved immediately.

Therefore, in order to solve the above problem, it is necessary to provide a new and inventive frame of an electric wheelchair.

The main object of the present invention is to provide a frame of an electric wheelchair capable of effectively achieving a cushioning effect to improve driving comfort and effectively avoiding overturning of the frame. do.

To achieve the above object, the present invention provides a frame of an electric wheelchair including a frame body, a group of connecting rod wheels, and a drive device. A first fixing portion and a second fixing portion are installed on the frame body. The connecting rod wheel group includes a first connecting rod and a second connecting rod, the first connecting rod is oscillatingly installed in the first fixing portion, and the second connecting rod is the second fixing portion. A first guide wheel is installed on the first connecting rod, a second guide wheel is installed on the second connecting rod, and the first connecting rod is movable with the second connecting rod. Assembled to. The drive unit includes a connecting seat, a power unit and a drive wheel, the connecting seat is pivotally attached to the first connecting rod, the power unit is fixed to the connecting seat, and the driving wheel is the power unit. The pivotal axis direction of the connecting seat is parallel to the rotation axis direction of the drive wheels.

It is a perspective view of a preferable embodiment of the present invention. It is an exploded view of a preferable example of this invention. It is a front partial cross-sectional view of a preferable embodiment of this invention. It is a plane partial cross-sectional view of a preferable embodiment of this invention. It is a side view of the preferable Example of this invention. It is a partially enlarged view of the preferable Example of this invention. It is the schematic of the uphill and downhill of a preferable embodiment of the present invention. It is the schematic of the uphill and downhill of a preferable embodiment of the present invention.

Hereinafter, possible embodiments of the present invention will be described with reference to examples, but the technical scope of the present invention is not intended to be limited.

As shown in preferred embodiments of the present invention in FIGS. 1 to 8, the frame of the electric wheelchair of the present invention includes a frame main body 1, a connecting rod wheel group 2, and a driving device 5.

A first fixing portion 11 and a second fixing portion 12 are installed on the frame body 1. In this embodiment, the first fixing portion 11 and the second fixing portion 12 are installed at both ends of the frame body 1 facing each other, and the vertical height of the first fixing portion 11 is the vertical height of the second fixing portion 12. Smaller than the height.

The connecting rod wheel group 2 includes a first connecting rod 3 and a second connecting rod 4, and the first connecting rod 3 is swingably installed in the first fixing portion 11, and the second connecting rod 4 is installed. Is swingably installed on the second fixing portion 12, the first guide wheel 21 is installed on the first connecting rod 3, the second guide wheel 22 is installed on the second connecting rod 4, and the second guide wheel 22 is installed. The 1 connecting rod 3 is movably assembled with the 2nd connecting rod 4.

The drive device 5 includes a connection seat 51, a power device 52, and a drive wheel 53, the connection seat 51 is pivotally attached to the first connecting rod 3, and the power device 52 is fixed to the connection seat 51. Then, the drive wheel 53 is power-connected to the power device 52 to drive the frame so as to move with respect to the ground, and the pivotal axis direction of the connection seat 51 is the rotation axis of the drive wheel 53. It is parallel to the direction, which allows the drive device 5 to swing with respect to the first connecting rod 3.

As a result, the first connecting rod 3 and the second connecting rod 4 can swing with respect to the frame body 1, and the driving device 5 can swing with respect to the first connecting rod 3. Therefore, when the frame of the electric wheelchair travels on the ground, the first guide wheel 21, the second guide wheel 22, and the drive wheel 53 swing up and down with respect to the frame body 1 according to the ground. Since it can move so that it can smoothly contact the ground and the drive device 5 can swing with respect to the first connecting rod 3, the drive device 5 exerts an impact on the ground. By avoiding direct transmission to the frame body 1 when it is received, it is possible to achieve a cushioning effect, reduce the burden on the passenger, and avoid capsizing.

Specifically, the first connecting rod 3 includes a connected first rod member 31 and a connecting member 32, one side of the connecting seat 51 is pivotally attached to the connecting member 32, and the other side is. One end of the first damper device 61 connected to the power device 52 is connected to the first rod member 31, and the other end is separated from a portion pivotally attached to the connecting member 32 of the connecting seat 51. This allows the impact force between the coupling member 32 and the first rod member 31 to be relaxed and a reset effect to be achieved.

Preferably, two stoppers 321 are installed on one side of the connecting member 32 toward the connecting seat 51, and two stopper pieces 511 are projected on one side of the connecting seat 51 toward the connecting member 32. The connecting member 32 and the connecting seat 51 are formed by the two stoppers 321 located between the two stopper pieces 511 and the separated ends of the two stoppers 321 abutting on the two stopper pieces 511, respectively. It is possible to prevent the and from swinging from side to side and to achieve a cushioning effect. In this embodiment, the two stoppers 321 are pivotally attached to the coupling member 32, the rotation axis direction of the two stoppers is parallel to the vertical direction, and the two stoppers, the two stopper pieces, and the coupling member Friction with 32 can be reduced.

Further, the connecting member 32 is connected to the bottom portion between both ends of the first rod member 31, and one end of the connecting member 32 away from the first rod member 31 is pivotally attached to the first fixing portion 11. The first guide wheel 21 is installed at one end of the first rod member 31 away from the frame body, and the second connecting rod 4 includes a second rod member 41 and a third rod member 42, and the second rod member 42 is included. A first end 43, a first pivot 44, a second pivot 45, and a second end 46 are sequentially installed on the rod member 41, and the second pivot 45 is the second fixing portion. The first end 43 is pivotally attached to the first rod member 31 so as to be movable and rotatably assembled, and the third rod member 42 is pivotally attached to the first rod member 44. The 2 guide wheels 22 are installed at one end of the 3rd rod member 42 away from the 2nd rod member 41, whereby the 1st rod member 31 can move and swing with respect to the 2nd rod member 41. By making the second rod member 41 swingable with respect to the third rod member 42, the second rod member 41 swings effectively according to the ground shape.

Similarly, preferably, a second damper device 62 is further included, one end of the second damper device 62 is connected to the second end portion 46, and the other end is connected between both ends of the third rod member 42. As a result, the impact force between the second rod member 41 and the third rod member 42 is reduced and the reset effect is achieved. In this embodiment, the first damper device 61 and the second damper device 62 are achieved. Is a shock absorber, which may be a device such as an elastic cushion or a pneumatic cylinder in other embodiments.

Two spaced tabs 47 are installed at the first end 43, and a long groove 48 is installed in each of the two tabs, and the two long grooves 48 are along the extending direction of the two pivot tabs. The two tabs 47 are fitted into the first rod member 31, the lock member 49 is bored in the first rod member 31, and the two tabs 47 are movably bored in the two long grooves 48. This makes the first rod member 31 slidable and swingable with respect to the second rod member 41, so that both the first guide wheel 21 and the second guide wheel 22 come into contact with the ground. Secure.

It should be noted that in this embodiment, the first receiving member 13 and the second receiving member 14 are further included, one end of the first receiving member 13 is installed in the frame body 1, and the other end is the first. 1 The rod member 31 extends to one side away from the frame body 1 and is received, the second receiving member 14 is installed on the frame body 1, and the third rod member 42 is received from the frame body 1. The first receiving member 13 and the second receiving member 14 are received on one side away from each other, and the first rod member 31 and the third rod member 42 swing left and right along the horizontal direction to perform the electric motorization. It is possible to prevent the wheelchair frame from being affected in the forward and backward movements.

Preferably, the frame of the electric wheelchair further includes a first gasket 15 and a second gasket 16, the first gasket 15 is installed in the frame body 1, and the second receiving member 14 is the first gasket 15. The second gasket 16 is installed on one side of the second receiving member 14 toward the first gasket 15, and the first gasket 15 and the second gasket are located on one side away from the frame body 1. 16 is abutted and sandwiched by the third rod member 42, and can prevent wear between the third rod member 42 and the second receiving member 14 or the frame body 1, where the first gasket The 15 and the second gasket 16 are plastic materials, and may be other materials having a low hardness in other examples.

1 Frame body 11 1st fixing part 12 2nd fixing part 13 1st receiving member 14 2nd receiving member 15 1st gasket 16 2nd gasket 2 Connecting rod wheel assembly 21 1st guide wheel 22 2nd guide wheel 3rd 1 Connecting rod 31 1st rod member 32 Connecting member 321 Stopper 4 2nd connecting rod 41 2nd rod member 42 3rd rod member 43 1st end 44 1st pivot 45 2nd pivot 46 2nd end 47 Tab 48 Long groove 49 Lock member 5 Drive device 51 Connection seat 511 Stopper piece 52 Power device 53 Drive wheel 61 1st damper device 62 2nd damper device

Claims (10)

The frame of an electric wheelchair
The frame body on which the first fixing part and the second fixing part are installed,
A first connecting rod swayably installed in the first fixing portion and a second connecting rod swayably installed in the second fixing portion are included, and a first guide wheel is provided on the first connecting rod. Is installed, a second guide wheel is installed on the second connecting rod, and a connecting rod wheel group in which the first connecting rod is movably assembled with the second connecting rod,
A connecting seat, a power unit, and a driving wheel are included, the connecting seat is pivotally attached to the first connecting rod, the power device is fixed to the connecting seat, and the driving wheel is power-connected to the power device. A frame of an electric wheelchair including a drive device in which the pivotal axis direction of the connecting seat is parallel to the rotation axis direction of the drive wheels. The first connecting rod includes a connected first rod member and a connecting member, one side of the connecting seat is pivotally attached to the connecting member, the other side is connected to the power unit, and a first damper. The first aspect of the present invention, wherein one end of the device is connected to the first rod member, and the other end is connected to one end of the connecting seat away from the portion pivotally attached to the connecting member. Electric wheelchair frame. Two stoppers are installed on one side of the connecting member toward the connecting seat, two stopper pieces are projected on one side of the connecting member facing the connecting member, and the two stoppers are the two stopper pieces. The frame of an electric wheelchair according to claim 2, wherein the separated ends of the two stoppers are in contact with the two stopper pieces, respectively. The connecting member is connected to the bottom portion between both ends of the first rod member, one end of the connecting member separated from the first rod member is pivotally attached to the first fixing portion, and the first guide wheel is The first rod member is installed at one end away from the frame body, the second connecting rod includes a second rod member and a third rod member, and the second rod member includes a first end portion and a first rod member. A pivoting portion, a second pivoting portion, and a second end portion are sequentially installed, the second pivoting portion is pivotally attached to the second fixing portion, and the first end portion is the first rod. Assembled movably and rotatably with the member, the third rod member is pivotally attached to the first pivot, and the second guide wheel is one end of the third rod member away from the second rod member. The frame of the electric wheelchair according to claim 2, wherein the frame is installed in the electric wheelchair. 4. A fourth aspect of the present invention, further comprising a second damper device, wherein one end of the second damper device is connected to the second end portion and the other end is connected between both ends of the third rod member. The frame of the electric wheelchair described in. Two spaced tabs are installed at the first end, a long groove is installed in each of the two tabs, and the two long grooves extend along the extending direction of the two pivot tabs. The two tabs are fitted into the first rod member, and the lock member is bored in the first rod member and movably bored in the two elongated grooves. Item 4. The frame of the electric wheelchair according to item 4. Further including a first receiving member and a second receiving member, one end of the first receiving member is installed in the frame body, and the other end extends to one side of the first rod member away from the frame body. The electric wheelchair according to claim 1, wherein the second receiving member is installed on the frame body and is received on one side of the third rod member away from the frame body. Frame. The first gasket and the second gasket are further included, the first gasket is installed in the frame body, the second receiving member is located on one side of the first gasket away from the frame body, and the second gasket. 7 is installed on one side of the second receiving member toward the first gasket, and the first gasket and the second gasket are in contact with and sandwiched with the third rod member. The frame of the electric wheelchair described in. The first fixing portion and the second fixing portion are respectively installed at both opposite ends of the frame body, and the vertical height of the first fixing portion is smaller than the vertical height of the second fixing portion. The frame of the electric wheelchair according to claim 1. The connecting member is connected to the bottom portion between both ends of the first rod member, one end of the connecting member separated from the first rod member is pivotally attached to the first fixing portion, and the first guide wheel is The first rod member is installed at one end away from the frame body, the second connecting rod includes a second rod member and a third rod member, and the second rod member includes a first end portion and a first rod member. A pivoting portion, a second pivoting portion, and a second end portion are sequentially installed, the second pivoting portion is pivotally attached to the second fixing portion, and the first end portion is the first rod. Assembled movably and rotatably with the member, the third rod member is pivotally attached to the first pivot, and the second guide wheel is one end of the third rod member away from the second rod member. Installed in
A second damper device is further included, one end of the second damper device is connected to the second end, and the other end is connected between both ends of the third rod member.
Two spaced tabs are installed at the first end, a long groove is installed in each of the two tabs, and the two long grooves extend along the extending direction of the two pivot tabs. The two tabs are fitted into the first rod member, the lock member is bored in the first rod member, and the two tabs are movably bored in the two elongated grooves.
Further including a first receiving member and a second receiving member, one end of the first receiving member is installed in the frame body, and the other end extends to one side of the first rod member away from the frame body. The second receiving member is installed on the frame body and is received on one side of the third rod member away from the frame body.
The first gasket and the second gasket are further included, the first gasket is installed in the frame body, the second receiving member is located on one side of the first gasket away from the frame body, and the second gasket. Is installed on one side of the second receiving member toward the first gasket, and the first gasket and the second gasket are in contact with the third rod member and sandwiched.
The first fixing portion and the second fixing portion are installed at both ends of the frame body facing each other, and the vertical height of the first fixing portion is smaller than the vertical height of the second fixing portion.
The first damper device and the second damper device are shock absorbers.
The claim is characterized in that the two stoppers are pivotally attached to the coupling member, the rotation axis direction of the two stoppers is parallel to the vertical direction, and the first gasket and the second gasket are made of a plastic material. Item 3. The frame of the electric wheelchair according to Item 3.

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