JP2013248371A - Wheelchair drive - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a driving apparatus for wheelchair, wherein severe wasting for driving is minimized to improve driving efficiency, whereby a hand required for driving is prevented from being stained with foreign matters and the like, and the hand is prevented from being damaged due to wheel.SOLUTION: A driving apparatus for wheelchair includes: a supporting part 110 rotatably fixed to a wheel; and a driving part 120 rotatably fixed to the supporting part, abutting on the wheel by external force, and providing to the wheel a torque corresponding to the external force.

Description

  The present invention relates to a wheelchair drive device, and more particularly, to a wheelchair drive device that can reduce the consumption of physical strength and enhance the effect of stability by making the wheelchair movement operation simpler and easier. is there.

  In general, a wheelchair is a structure that serves as a means to conduct external and internal activities of a disabled person whose leg function is weakened or lost.

  This wheelchair basically has a chair frame on which a disabled person sits, each drive wheel mounted at the rear end of both sides of the chair frame, and an auxiliary wheel having a smaller diameter than the drive wheel mounted at each front end of the chair frame. And driving rings mounted on the outer sides of the left and right driving wheels along the frame of the driving wheel.

  In the above-described conventional wheelchair, the disabled person can sit on the chair frame and move forward and backward by pushing the drive ring back and forth with both hands and pulling, and the auxiliary wheel can also change the direction. Is possible.

  However, in conventional wheelchairs, the drive ring is fixedly mounted with the drive wheel in an integrated structure while repeatedly holding and pulling the drive ring with both hands, so that the operator directly pushes the drive wheel with both hands. There is a problem that it becomes a pulling situation and the physical wear is increased.

  In addition, since the drive ring is mounted on the outer outer ring of the drive wheel, both hands grasping due to dust and contamination generated while the drive wheel moves around the entire rotation due to the advance of the drive wheel, There is also the problem of getting dirty.

  In addition, since both hands of the operator can not grasp the drive ring unless it passes through the drive wheel, the sleeves etc. are likely to get dirty by hitting the drive wheel, and may be further damaged, There is a risk that an arm crossing the drive wheel may be injured by friction generated by rotation of the drive wheel.

  Therefore, in driving a wheelchair, there is an urgent need for research on a wheelchair drive device that minimizes physical strength consumption and at the same time gets dirty due to driving, and minimizes damage and injury.

  An object of the present invention is to provide a wheelchair drive device that minimizes physical wear for driving and improves driving efficiency, and at the same time prevents a hand necessary for driving from being contaminated by a foreign object or from being damaged by a wheel. It is to be.

  A wheelchair driving apparatus according to an embodiment of the present invention is configured to be pivotally fastened to a wheel and to be pivotally fastened to the support, and is in contact with the wheel by an external force and corresponds to the external force. And a drive unit that provides a rotational force to the wheel.

  The driving unit of the wheelchair driving device according to the embodiment of the present invention may be disposed separately from the wheel when the external force is removed.

  The driving unit of the wheelchair driving device according to an embodiment of the present invention is extended from the contact unit so as to provide a contact unit that is rotated by an external force to contact the wheel and a rotation axis of the contact unit. A fastening part fastened to the support part, and a connection part for connecting the contact part and the fastening part to each other.

  The contact portion of the wheelchair drive device according to the embodiment of the present invention may be bent toward the wheel.

  The wheelchair drive device according to an embodiment of the present invention may be formed to correspond to an outer surface formed in a round of the wheel.

  The contact portion of the wheelchair drive device according to the embodiment of the present invention may contact the wheel while receiving the wheel.

  The driving unit of the wheelchair driving device according to an embodiment of the present invention may include an elastic member that provides a force acting to be spaced apart from the wheel when the external force is removed.

  The elastic member of the wheelchair drive device according to the embodiment of the present invention may be fastened to a rotation shaft of the drive unit.

  The driving unit of the wheelchair driving device according to the embodiment of the present invention may include an external force applying unit that extends outward to apply the external force.

  The external force application unit of the wheelchair drive device according to the embodiment of the present invention may be bent outside the wheel to prevent contact with the wheel when the external force is applied.

  The support portion of the wheelchair drive device according to the embodiment of the present invention includes a first support portion that is fastened to a rotation shaft of the wheel and is extended to the outside of the wheel so as to be rotatable on the wheel; And a second support portion that is extended while being bent from one side of the support portion.

  The driving unit of the wheelchair driving device according to the embodiment of the present invention may be fastened to the second support unit while being disposed in an internal space provided by the second support unit.

  The wheelchair drive device according to an embodiment of the present invention may further include a guide unit that is coupled and fixed to the rotation shaft of the wheel and that allows the support unit to rotate inside.

  The guide part of the wheelchair drive device according to the embodiment of the present invention may include a hook part that is in contact with the support part and limits a rotation angle of the support part.

  The guide part of the wheelchair drive device according to the embodiment of the present invention includes a first guide part that is primarily inserted and coupled to the rotating shaft, and a second guide member that is secondarily inserted and coupled to the rotating shaft. A second guide part that acts so that the support part is disposed between the first guide part and the second guide part. is there.

  At least one of the fixing holes formed in the first guide part and the second guide part to be inserted into the rotating shaft of the wheelchair drive device according to the embodiment of the present invention is formed in a polygonal shape. Sometimes.

  The first guide part of the wheelchair drive device according to the embodiment of the present invention includes an insertion wall inserted into a fastening hole formed in the support part, and the second guide part is located outside the insertion wall. May be provided with an insertion-corresponding wall.

  The support part of the wheelchair drive device according to the embodiment of the present invention includes a wear prevention wall formed to protrude from an outer end of the fastening hole, and the wear prevention wall corresponds to the insertion wall and the insertion. May be placed between walls.

  The hook portion of the wheelchair drive device according to the embodiment of the present invention may be formed to protrude toward the rotation axis direction.

  The hanging portion of the wheelchair driving device according to the embodiment of the present invention includes an attachment / detachment portion formed with a radially increased width at least one of one end and the other end of the hanging portion. The support portion may include an attachment / detachment corresponding portion that acts so that the attachment / detachment portion is inserted when contacting the hook portion.

  The attachment / detachment corresponding part of the wheelchair drive device according to the embodiment of the present invention may be formed indented toward the inside of the support part.

  According to the wheelchair drive device according to the embodiment of the present invention, the driving efficiency can be maximized by minimizing physical wear for driving.

  In addition, the present invention can be embodied by a simple and easy method when applying an external force for driving.

  Furthermore, it is possible to prevent the hand from getting dirty or damaged by the wheel during driving.

It is a schematic perspective view which shows the wheelchair containing the drive device for wheelchairs by one Example of this invention. 1 is a schematic cutaway perspective view showing a wheelchair drive device according to an embodiment of the present invention. 1 is a schematic exploded perspective view showing a wheelchair drive device according to an embodiment of the present invention. FIG. 4 is a schematic enlarged view of A shown in FIG. 3, and is a schematic exploded perspective view showing a coupling relationship between a guide part and a support part provided in a wheelchair drive device according to an embodiment of the present invention. FIG. 4 is a schematic enlarged view of a modified example of A shown in FIG. 3, and is a schematic exploded perspective view showing a coupling relationship between a guide part and a support part provided in a wheelchair drive device according to an embodiment of the present invention. FIG. 4 is a schematic enlarged view of another modified example of A shown in FIG. 3, and is a schematic exploded perspective view showing a coupling relationship between a guide portion and a support portion provided in a wheelchair drive device according to an embodiment of the present invention. . FIG. 4 is a schematic enlarged view of still another modification example of A shown in FIG. 3, and is a schematic exploded view showing a coupling relationship between a guide shaft provided in a wheelchair drive device according to an embodiment of the present invention and a rotation axis of a wheel It is a perspective view. It is a schematic sectional drawing which shows the state at the time of applying an external force to the wheelchair drive device by one Example of this invention. It is a schematic sectional drawing which shows the state which the application of external force continues to the wheelchair drive device by one Example of this invention. It is a schematic sectional drawing which shows the time of an external force application being completed to the drive device for wheelchairs by one Example of this invention. It is the schematic sectional drawing (state which the contact part and the wheel contacted) and the schematic perspective view which show the example of a change with respect to the contact part of the drive part provided to the drive device for wheelchairs by one Example of this invention. It is the schematic sectional drawing (state which the contact part and the wheel contacted) and the schematic perspective view which show the other modification with respect to the contact part of the drive part provided to the drive device for wheelchairs by one Example of this invention. It is the schematic sectional drawing (state which the contact part and the wheel contacted) and the schematic perspective view which show the other modification with respect to the contact part of the drive part provided to the drive device for wheelchairs by one Example of this invention.

  Hereinafter, specific embodiments of the present invention will be described in detail with reference to the drawings. However, the idea of the present invention is not limited to the presented embodiments, and those skilled in the art who understand the idea of the present invention can make other steps within the scope of the same idea by adding, changing, or deleting other components. Other embodiments included within the scope of the invention and the idea of the present invention can be easily proposed, and can be said to be included within the scope of the idea of the present invention.

  In addition, constituent elements having the same functions within the scope of the same idea shown in the drawings of the embodiments will be described using the same reference numerals.

  FIG. 1 is a schematic perspective view showing a wheelchair including a wheelchair drive device according to an embodiment of the present invention, and FIG. 2 is a schematic incision perspective view showing a wheelchair drive device according to an embodiment of the present invention. 3 is a schematic exploded perspective view showing a wheelchair drive device according to an embodiment of the present invention. FIG. 4 is a schematic enlarged view of A shown in FIG. 3, and the wheelchair drive according to an embodiment of the present invention. It is a schematic exploded perspective view which shows the coupling | bonding relationship of the guide part provided in an apparatus, and a support part.

  1 to 4, a wheelchair 10 including a wheelchair drive device 100 according to an embodiment of the present invention includes a wheelchair drive device 100 that acts to provide a driving force, and the wheelchair drive device 100 is fastened. Wheel 200, auxiliary wheel 300 for turning, and chair frame 400 may be included.

  Here, the wheel 200, the auxiliary wheel 300, and the chair frame 400 are components that can be employed in a known wheelchair, and will not be described in detail.

  The wheelchair drive device 100 is a structure that can provide a driving force to the wheelchair 10 by an external force of an operator, and includes a support unit 110 that is fastened to the wheel 200 and a driving unit 120 that provides the wheel 200 with a rotational force. Can be included.

  Specifically, the support unit 110 may include a first support unit 112 and a second support unit 114 as components for firmly fixing the driving unit 120 to the wheelchair 10.

  That is, the support part 110 is fastened to the rotating shaft 210 of the wheel 200 so as to be rotatable with respect to the wheel 200 and extends to the outside of the wheel 200 and one of the first support part 112. And a second support portion 114 that is extended while being bent from the side.

  Here, the second support part 114 may be bent toward the outer side in the radial direction of the wheel 200 to form a predetermined internal space, and the driving part 120 is disposed in the internal space. Can do.

  However, the first support part 112 may be formed on both sides based on the second support part 114, which means that the first support part 112 is fastened on both sides of the wheel 200.

  Meanwhile, the support part 110, that is, the first support part 112 may be fastened to the rotary shaft 210 through a guide part 130 fastened to the rotary shaft 210 so as to be rotatable about the wheel 200.

  That is, the guide part 130 may be a structure that is coupled and fixed to the rotating shaft 210 and the support part 110 is configured to be rotatable inside, and the first guide part 132 and the second guide part 134 may be provided. Can be included.

  The first guide part 132 may be primarily inserted and coupled to the rotating shaft 210, and the second guide part 134 may be secondarily inserted and coupled to the rotating shaft 210 to be coupled between the first guide parts 132. The support part 110 may be arranged and configured.

  Here, the guide part 130 may include a hook part 135 that contacts the support part 110 and restricts a rotation angle of the support part 110. Specifically, the hook part 135 may be a first guide part. It can be formed along the outside of 132.

  That is, the hook portion 135 may be continuously formed along the outer side of the first guide portion 132 while protruding toward the rotation shaft 210.

  However, the hook portion 135 is not necessarily formed continuously, and may be formed only at the limit portion of the rotation angle of the support portion 110.

Here, the first support portion 112 of the support portion 110 can be configured to be rotatable between the first guide portion 132 and the second guide portion 134, and the hanging portion 136 is formed in the rotation range. There may be no range.
A specific description thereof will be described later with reference to FIGS.

  Meanwhile, the hook portion 136 may be surrounded by an outer wall 138 that protrudes from the outer side of the second guide portion 134, and the outer wall 138 may act as a protective structure for the hook portion 136. .

  That is, when the first guide portion 132 and the second guide portion 134 are fastened, the hook portion 136 is stably protected by being inserted inside the outer wall 138 and at the same time, with the first guide portion 132. The coupling force of the second guide part 134 can be improved.

  On the other hand, the hanging portion 136 may be provided with an attaching / detaching portion 137 formed with an increased width in at least one of the end portions on one side and the other side, and supported so as to correspond thereto. The first support part 112 of the part 110 may include an attachment / detachment corresponding part 115 that acts to insert the attachment / detachment part 137 when the first support part 112 is in contact with the hook part 136.

  The attachment / detachment corresponding portion 115 may be formed to be recessed toward the inside of the first support portion 112 of the support portion 110 and may be formed in a shape corresponding to the attachment / detachment portion 137.

  As a result, when the support part 110 is rotated by an external force within the guide part 130, the operator can feel the boundary point of the rotation by inserting the attaching / detaching part 137 and the attaching / detaching corresponding part 115. The convenience can be improved.

  Meanwhile, the first guide part 132 of the guide part 130 may include an insertion wall 133 inserted into a fastening hole H <b> 2 formed in the support part 110, and the second guide part 134 is fastened to the first guide part 132. In this case, an insertion corresponding wall 135 disposed outside the insertion wall 133 may be provided.

  Here, the support part 110 may include a wear prevention wall 116 that protrudes from an outer end of the fastening hole H2, and the wear prevention wall 116 is disposed between the insertion wall 133 and the insertion corresponding wall 135. Thus, wear caused when the support part 110 rotates can be minimized.

  As a result, the wear prevention wall 116 can improve the performance and life of the wheelchair drive device 100 according to an embodiment of the present invention.

Hereinafter, the coupling relationship between the rotating shaft 210 and the guide unit 130 will be described.
The first guide part 132 and the second guide part 134 have a fixing hole H1 at the center, and the rotation shaft 210 can be inserted into the first guide part 132 and the second guide part 134. After the insertion, the nut N, which is another fastening member, is projected. By fastening to the rotating shaft 210, the first guide portion 132 and the second guide portion 134 can be stably and firmly fixed to the rotating shaft 210 at the same time.

  Here, when the insertion wall 133 formed in the first guide portion 132 is inserted into the fastening hole H2 formed in the first support portion 112 and the insertion corresponding wall 135 is inserted into the insertion wall 133, the first support The part 112 may be disposed so as to be rotatable between the first guide part 132 and the second guide part 134.

  The driving unit 120 can be fastened to the above-described support unit 110 so that the driving unit 120 contacts the wheel 200 by an external force applied to the external force applying unit 140 and generates a rotational force corresponding to the external force. 200 can be provided.

  Specifically, when the external force is removed, the driving unit 120 may be spaced apart from the wheel 200 by the elastic member E, and may include a contact part 121, a fastening part 123, and a connection part 122. .

  The contact part 121 may be rotated by an external force applied to the external force application part 140 to contact the wheel 200, and the fastening part 123 may be configured to provide the rotation shaft 126 of the contact part 121. The second support part 114 may be fastened to the second support part 114, which is the support part 110.

  The connecting portion 122 is a component that connects the contact portion 121 and the fastening portion 123 to each other.

  Meanwhile, the fastening part 123 may include a rotation hole H4 corresponding to the coupling hole H3 formed in the second support part 114 in order to provide the rotation shaft 126 of the contact part 121.

  Here, the rotation shaft connecting portion 127 can be inserted outside the rotation hole H4, and the bolt B can be connected to the coupling hole H3 disposed on the one side from the outside of the second support portion 114. After passing through the moving shaft connecting portion 127, the rotating hole H4, and the rotating shaft 126, and further passing through the rotating hole H4, the rotating shaft connecting portion 127, and the insertion hole H3 disposed on the other side, the nut N is inserted. By fastening, the fastening part 123 can be fastened.

  However, the coupling between the fastening part 123 and the second support part 114 is not limited to the above-described bolt B and nut N, and it is obvious that various fastening means can be applied according to the intention of those skilled in the art. is there.

  Here, a rod-shaped external force application unit 140 may be fixedly coupled to the contact unit 121, and the external force application unit 140 may perform a handle function of providing an external force with an operator's hand.

  The external force application unit 140 may be bent outside the wheel 200 in order to prevent contact with the wheel 200 when applying an external force of the operator. Can be prevented from being soiled by foreign matter or being damaged by the wheel 200.

  Meanwhile, when the external force applied to the external force application unit 140 is removed, the contact unit 121 of the driving unit 120 may be disposed so as to be separated from the wheel 200 by the elastic member E. For example, the contact portion 121 may be rotated about the shaft 126.

  Specifically, the elastic member E can be fastened to the rotating shaft 126, and the elastic member E can be formed to be symmetric with respect to the approximate center of the fastening part 121.

  At this time, both end portions of the elastic member E can be in contact with the upper surface inside the second support portion 114 of the support portion 110, and the substantially central portion can be in contact with the rear side of the fastening portion 123.

  Accordingly, when an external force is not applied to the external force application unit 140, the elastic member E can provide a force by which the contact unit 121 separates the rotating shaft 126 from the wheel 200 due to its own elasticity. The wheelchair drive device 100 according to the embodiment of the present invention can freely rotate based on the rotation shaft 210.

  However, the elastic member E that provides the force for separating the contact portion 121 from the wheel 200 is not limited to the shape described above, and it will be clarified that the elastic member E can be variously changed according to the intention of those skilled in the art.

  Meanwhile, the wheelchair driving device 100 according to an embodiment of the present invention seeks at least a part of the support part 110, that is, the second support part 114 to protect the support part 110 from the outside and at the same time beautify the appearance. The protection unit 150 may be further included.

  Here, the protection unit 150 is not limited to a certain shape, and various shapes can be applied according to the intention of those skilled in the art.

  FIG. 5 is a schematic enlarged view of the modified example A shown in FIG. 3, and is a schematic exploded perspective view showing the coupling relationship between the guide portion and the support portion provided in the wheelchair drive device according to the embodiment of the present invention. It is.

  Referring to FIG. 5, the structure and effect are the same as those of the wheelchair drive device 100 described with reference to FIGS. 1 to 4 except for the hook part 136 a formed on the guide part 130 a, and thus the hook part 136 a. Descriptions other than are omitted.

  The hook portion 136a for limiting the rotation angle of the support portion 110 can be continuously formed along the inner surface of the outer wall 138a of the second guide portion 134a while protruding toward the rotation axis direction. .

  However, the hook portion 136a is not necessarily formed continuously, and may be formed only at the limit portion of the rotation angle of the support portion.

  FIG. 6 is a schematic enlarged view of another modification of A shown in FIG. 3, and is a schematic exploded view showing the coupling relationship between the guide portion and the support portion provided in the wheelchair drive device according to one embodiment of the present invention. It is a perspective view.

  Referring to FIG. 6, except for the inner wall 139 b formed on the guide part 130 b, the inner wall 139 b is the same as the wheelchair drive device 100 described with reference to FIGS. 1 to 4. Descriptions other than are omitted.

  The second guide part 134b of the guide part 130b may include an inner wall 139b formed on the inner side of the outer wall 138b and spaced apart from the outer wall 138b, whereby the outer wall 138b and the inner wall 139b are formed. A predetermined section S can be provided between the two.

  The space S may mean a space for inserting a hook portion 136b formed in the first guide portion 132b when the first guide portion 132b and the second guide portion 134b are fastened. The shape of the space S can be a shape corresponding to the shape of the hooking portion 136b.

  On the other hand, the space S can be partitioned based on points corresponding to one end and the other end of the hooking portion 136b, and the partitioning boundary portion includes one side of the hooking portion 136b and the other side. A space whose width is increased in the radial direction may be provided so that the detachable portion 137b formed in at least one of the end portions can be stably inserted.

  FIG. 7 is a schematic enlarged view of another modified example of A shown in FIG. 3, and the coupling relationship between the guide shaft provided in the wheelchair drive device according to the embodiment of the present invention and the rotation axis of the wheel. FIG.

  Referring to FIG. 7, except for the fixing hole H <b> 1 c formed in the guide portion 130 c, the configuration and effect are the same as those of the wheelchair drive device 200 described with reference to FIGS. 1 to 4. Descriptions other than are omitted.

  Further, it is clarified that the guide part 130c can be applied to both the guide parts 130a and 130b described with reference to FIGS. 5 to 6 except for the fixing hole H1c.

  At least one of the fixing holes H1c formed in the guide part 130c to be inserted into the rotating shaft 210, that is, the first guide part 132c and the second guide part 134c may be formed in a polygonal shape.

  That is, the fixing hole H1c can be formed in a shape corresponding to the nut N fastened to the rotating shaft 210, and the nut N is inserted into the fixing hole H1c, so that there is no need for another fastening member. The guide part 130c can be fixed to the rotating shaft 210 by the method.

  In other words, after forming at least one of the fixing holes H1c formed in the first guide part 132c and the second guide part 134c into a polygonal shape, the nut N fastened to the rotating shaft 210 is inserted to The rotating shaft 210 and the first guide part 132c and the second guide part 132c can be fastened to each other.

  FIG. 8 is a schematic cross-sectional view showing a state in which an external force is applied to the wheelchair drive device according to the embodiment of the present invention, and FIG. 9 illustrates the application of the external force to the wheelchair drive device according to the embodiment of the present invention. FIG. 10 is a schematic cross-sectional view showing a state in which application of external force to the wheelchair drive device according to one embodiment of the present invention is completed.

  First, referring to FIG. 8, before driving the wheelchair 10, that is, before the external force F is applied to the external force application unit 140, the contact portion 121 of the drive unit 120 is separated from the wheel 200 by the elastic force of the elastic member E. Maintain the state.

  Here, the one end portion of the hook portion 136 formed on the guide portion 130 maintains the contact state with the first support portion 112 of the support portion 110, and the attachment / detachment formed on the one side end portion of the hook portion 136. The part 137 maintains the state inserted in the attachment / detachment corresponding part 115 of the first support part 112.

  At this time, in order to drive the wheelchair 10, the operator pushes the external force applying unit 140 with his / her hand, and the contact unit 121 of the instantaneous driving unit 120 can be brought into contact with the wheel 200.

  Therefore, thereafter, the contact portion 121 and the wheel 200 can be rotated based on the rotation shaft 210 in conjunction with each other by the external force F applied to one side of the external force application unit 140, thereby causing the wheelchair 10 to move. It can be implemented.

  That is, referring to FIG. 9, the external force F is applied to one side of the external force application unit 140 to bring the contact unit 121 and the wheel 200 into contact with each other, and the external force F is continuously provided to the external force application unit 140 from that state. To do.

  In this case, the wheel 200 is rotated R based on the rotating shaft 210 by the continuous external force F, and the rotational force of the wheel 200 may have a magnitude corresponding to the external force F.

  Therefore, the wheelchair 10 is moved by rotating the wheel 200 by friction with the ground by the external force F.

  Referring to FIG. 10, when the operator finishes applying the external force F through the external force applying unit 140, the support unit 110 is rotated by a predetermined angle based on the rotating shaft 210.

  Here, the other end portion of the hook portion 136 formed on the guide portion 130 is in contact with the first support portion 112 of the support portion 110, and the detachable portion 137 formed on the other end portion of the hook portion 136 is The first support part 112 is inserted into the attachment / detachment corresponding part 115.

  Accordingly, the operator can feel the turning boundary point by inserting the attaching / detaching portion 137 and the attaching / detaching corresponding portion 115, thereby improving the convenience of turning.

  On the other hand, for the continuous movement of the wheelchair 10, the support part 110 must return to the state shown in FIG.

  For this reason, the support part 110 must be rotated again in the direction opposite to the direction rotated from the state rotated by a predetermined angle based on the rotation shaft 210, so that the contact part 121 of the driving part 120 is separated from the wheel 200. Should be.

  Here, the separation between the contact part 121 and the wheel 200 can be realized by removing the external force F applied to the external force application part 140, and the restoring force of the elastic member E can be applied at this time.

  After the contact portion 121 and the wheel 200 are separated from each other, the operator can apply an external force to the external force applying unit 140 again to return to the state shown in FIG. 8, and will be described with reference to FIGS. The wheelchair 10 can be continuously moved by repeating the operation.

  Therefore, according to the wheelchair drive device 100 of the present invention, a drive ring that is an integral structure with the conventional wheel is not required for driving the wheelchair 10, so that physical consumption for driving is minimized and driving efficiency is maximized. Can be

  In other words, the wheelchair drive device 100 according to the present invention can easily and easily drive the wheelchair 10 by applying the external force F to one side of the rod-shaped external force application unit 140. Driving efficiency can be further improved by attaching to both wheels 200 of the wheelchair 10 at the same time.

  In addition, when the operator is driven by the external force application unit 140 that is bent and formed on the outside of the wheel 200, that is, when the external force F is applied, the hand is prevented from being soiled by foreign matter or being damaged by the wheel 200. Can do.

This can be said to be an effect that appears when a conventional drive ring is not used.
In other words, since the conventional drive ring is mounted on the outer ring outside the wheel, the operator's hand gripped by dust, dirt, etc. that can be generated while the wheel moves around the whole due to the rotation according to the march of the wheel becomes dirty. There is a risk that the operator's hands must grip the drive ring without passing through the wheel. The arm crossing the wheel may be injured by friction generated by the rotation of the wheel.

  However, the wheelchair drive device 100 according to the present invention does not require a conventional drive ring for driving, but can prevent the above-described problems.

  FIG. 11 is a schematic cross-sectional view (a state in which the contact portion and the wheel are in contact) and a schematic perspective view showing a modification example of the drive portion provided in the wheelchair drive device according to the embodiment of the present invention.

  Referring to FIG. 11, the contact part 521 of the driving unit 520 provided to the wheelchair driving apparatus 500 may be formed to correspond to the outer surface formed in the round of the wheel 200.

  That is, the contact area between the contact part 521 and the wheel 200 can be increased by an external force applied to the external force application part 140, thereby improving the frictional force between the contact part 521 and the wheel 200. Can do.

  Therefore, the driving efficiency with respect to the external force applied to the external force application unit 140 can be increased.

  However, it is clarified that the portion formed in the round may be formed not only in the contact portion 521 but also in the connection portion 522 or the fastening portion 523.

  FIG. 12 is a schematic cross-sectional view (a state in which the contact portion and the wheel are in contact) and a schematic perspective view showing another modification of the contact portion of the drive portion provided in the wheelchair drive device according to the embodiment of the present invention. .

  Referring to FIG. 12, the contact portion 621 of the driving unit 620 provided to the wheelchair driving device 600 may be bent toward the wheel 200.

  Therefore, when an external force is applied to the external force application unit 140 to bring the contact unit 621 into contact with the wheel 200, the contact can be realized even with a smaller force than the embodiment described with reference to FIGS.

  Therefore, the driving efficiency with respect to the external force applied to the external force application unit 140 can be increased.

  FIG. 13 is a schematic cross-sectional view (a state in which the contact portion and the wheel are in contact) and a schematic perspective view showing still another modification to the contact portion of the drive portion provided in the wheelchair drive device according to the embodiment of the present invention. is there.

  Referring to FIG. 13, the contact portion 721 of the driving unit 720 provided in the wheelchair driving device 700 is bent toward the wheel 200 and has a hole corresponding to the outer surface formed in the round of the wheel 200. can do.

  That is, the contact area between the contact part 721 and the wheel 200 can be increased by an external force applied to the external force application part 140, thereby improving the frictional force between the contact part 721 and the wheel 200. Can do.

  Accordingly, the driving efficiency with respect to the external force applied to the external force applying unit 140 can be increased, and the groove having a sealed structure other than the above-described hole for increasing the contact area between the contact unit 721 and the wheel 200 can be obtained. Clarify that it may be embodied in a shape.

  The configuration and characteristics of the present invention have been described above based on the embodiments of the present invention. However, the present invention is not limited to this, and various changes or modifications can be made within the spirit and scope of the present invention. It will be apparent to those skilled in the art to which this invention pertains, and such changes and modifications are therefore within the scope of the appended claims.

10: Wheelchair 100, 500, 600, 700: Wheelchair drive device 110: Support section 120, 520, 620, 720: Drive section 130, 130a, 130b, 130c: Guide section 140: External force application section 150: Protection section

Claims (21)

A support portion fastened to the wheel for rotation;
A wheelchair drive device comprising: a drive unit that is pivotally fastened to the support unit and that contacts the wheel by an external force and provides the wheel with a rotational force corresponding to the external force.   The wheelchair drive device according to claim 1, wherein the drive unit is disposed separately from the wheel when the external force is removed.   The drive unit is rotated by an external force to contact the wheel, a fastening unit extended from the contact unit and fastened to the support unit to provide a rotation axis of the contact unit, The wheelchair drive device according to claim 1, further comprising a connection portion that connects the contact portion and the fastening portion to each other.   The wheelchair drive device according to claim 3, wherein the contact portion is bent toward the wheel.   The wheelchair drive device according to claim 3, wherein the contact portion is formed to correspond to an outer surface formed in a round of the wheel.   The wheelchair drive device according to any one of claims 3 to 5, wherein the contact portion contacts the wheel while receiving the wheel.   The wheelchair according to any one of claims 1 to 6, wherein the driving unit includes an elastic member that provides a force to be spaced apart from the wheel when the external force is removed. Drive device.   The wheelchair drive device according to claim 7, wherein the elastic member is fastened to a rotation shaft of the drive unit.   The wheelchair drive device according to any one of claims 1 to 8, wherein the drive unit includes an external force application unit extended outward to apply the external force.   The wheelchair drive device according to claim 9, wherein the external force application unit is formed to bend outside the wheel so as to prevent contact with the wheel when the external force is applied.   The support part is fastened to a rotating shaft of the wheel so as to be pivotable to the wheel, and is extended while being bent from one side of the first support part. The wheelchair drive device according to any one of claims 1 to 10, further comprising a second support portion.   The wheelchair drive device according to claim 11, wherein the drive unit is rotatably coupled to the second support unit while being disposed in an internal space provided by the second support unit.   The wheelchair drive device according to any one of claims 1 to 12, further comprising a guide portion that is coupled and fixed to a rotation shaft of the wheel so that the support portion can rotate inside.   The wheelchair drive device according to claim 13, wherein the guide portion includes a hook portion that is in contact with the support portion and limits a rotation angle of the support portion. The guide part is first inserted into and coupled to the rotating shaft and joined to the rotating shaft, and the supporting part is disposed between the first guide part and secondly inserted and joined to the rotating shaft. A second guide portion that acts to
The wheelchair drive device according to claim 14, wherein the hanging portion is formed as one of the first guide portion and the second guide portion.   The wheelchair drive device according to claim 15, wherein at least one of the fixing holes formed in the first guide portion and the second guide portion to be inserted into the rotating shaft is formed in a polygonal shape.   The said 1st guide part is equipped with the insertion wall inserted in the fastening hole formed in the said support part, and the said 2nd guide part is equipped with the insertion corresponding wall arrange | positioned on the outer side of the said insertion wall. The wheelchair drive device according to claim 16. The support portion includes a wear prevention wall formed to protrude from an outer end of the fastening hole,
The wheelchair drive device according to claim 17, wherein the wear prevention wall is disposed between the insertion wall and the insertion corresponding wall.   The wheelchair drive device according to any one of claims 14 to 18, wherein the hook portion is formed to project toward the rotation axis direction. The hanging portion includes an attaching / detaching portion that is formed to increase in width in the radial direction at least one of one end and the other end.
The wheelchair drive device according to any one of claims 14 to 19, wherein the support portion includes an attachment / detachment corresponding portion into which the attachment / detachment portion is inserted when coming into contact with the hanging portion.   The wheelchair drive device according to claim 20, wherein the attachment / detachment corresponding portion is formed to be recessed toward the inside of the support portion.

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