WO2013141445A1

WO2013141445A1 - Two-speed wheel comprising a gear-changing device for a manually operated wheelchair

Info

Publication number: WO2013141445A1
Application number: PCT/KR2012/003955
Authority: WO
Inventors: 이승흥
Original assignee: 지마인터내셔날 주식회사
Priority date: 2012-03-21
Filing date: 2012-05-18
Publication date: 2013-09-26
Also published as: KR101185028B1

Abstract

The present invention relates to a two-speed wheel comprising a gear-changing device for a manually operated wheelchair, and more specifically relates to a two-speed wheel comprising a gear-changing device for a manually operated wheelchair whereby the person concerned can easily ascend uphill roads under their own direct action alone without help from others. More specifically, the purpose of the present invention is to provide a two—speed wheel comprising a gear-changing device for a manually operated wheelchair, wherein: the wheel axle of the wheelchair is fitted with a gear-changing mechanism having a planetary gearset that allows the wheel to be driven using just one half to one third the force; a second hand rim that can be operated when travelling at an incline is provided on the outside of a first hand rim that can be operated for travelling at normal times and is integrally linked with the wheel of the wheelchair; travel is effected using the first hand rim when travelling at normal times such as on flat terrain; and, when travelling at an incline, the second hand rim is operated such that the gear changing of the gear-changing mechanism having the planetary gear set can be implemented as the wheel is driven forwards using just one half to one third the force.

Description

Two-speed wheel with shift of manual wheelchair

The present invention relates to a two-speed wheel including a transmission of a manual wheelchair, and more particularly, to a two-wheel including a transmission of a manual wheelchair to easily climb the uphill by direct manipulation without the help of others. .

In general, the wheelchair can be manufactured in various structures according to the user's personal needs and the type of disability, the size is divided into adults and children according to who uses, divided into indoor and outdoor according to the place of use, and operation Depending on the method, it is divided into manual type and electric type.

The suitability of the wheelchair should consider the patient's physical condition, safety, diagnosis, prognosis, movement technology, propulsion methods, etc., and should also be easy to fold and push, and should also consider the movement of brakes and footrests.

Most of the motion of pushing the wheelchair is performed by repeatedly pushing the rim part which is integrally connected with the wheel by hand, unless another person pushes it.

Therefore, in consideration of the physical characteristics of the disabled or the patient when making the wheelchair, there should be no inconvenience in moving, as well as the convenience to climb without excessive force on the slope should be considered.

However, since the conventional manual wheelchair takes the driving action of pushing the hand rim integrally mounted on the rim of the wheel wheel by hand, the wheelchair is driven forward with 1: 1 force without shifting, It is very inconvenient to climb the ramp that enters from the entrances such as various facilities and buildings (administrative offices, community centers, schools, offices, etc.).

Generally, the slope of the ramp that the wheelchair can climb is regulated by 3 degrees for the general purpose and the maximum slope of about 5 degrees, but the length of the ramp should not be more than 6 m. I'm putting it.

However, although the building law is guaranteed in the facility regulations for the disabled, there are so many slopes that do not meet the legal standards so far, there is a problem that you must feel a great inconvenience to climb the slope from the disabled person or the patient himself.

Of course, in the case of the electric wheelchair can climb the ramp without difficulty, the price is very expensive disadvantage, and also has the disadvantage that the unit price is too expensive to adopt all wheelchairs in electric facilities (hospital, nursing facility, etc.).

The present invention has been made in view of the above, and is equipped with a transmission having a planetary gear set capable of driving the wheels with a force of 1/2 to 1/3 to the wheel shaft of the wheelchair, integral with the wheel of the wheelchair In addition to the first hand rim which can be used for normal driving operation, it is provided with a second hand rim that can be operated when driving on a slope.In the case of normal driving such as a flat land, the first hand rim is used for driving in one step. When driving, the second hand rim is operated to move in two stages, and the gear is shifted with the planetary gear set so that the wheels can be driven forward with only 1/2 to 1/3 of the force. It can double or triple the climbing capacity of the ramp, and even if the user releases the hand briefly from the hand rim during the forward driving, the reverse prevention function is activated to reverse the ramp. To provide a two-stage wheel including a transmission device for a manual wheelchair which can provide safety not slip as it is an object of effort.

The present invention for achieving the above object is a wheel for wheelchair; A first hand rim installed on an inner ring of the wheel for wheelchair to manually perform a driving operation; A transmission installed at a fixed shaft at the center of the wheel; A second hand rim mounted to the transmission, the second hand rim being operated by a user to directly input power to the transmission; The transmission includes an outer housing to which the spokes of the wheel for the wheelchair are connected; A ring gear integrally formed on the inner diameter surface of the outer housing; An input element body having a sun gear formed on an outer diameter surface of the inner end, a mounting hole for connection with a second hand rim formed on an outer circumferential surface of the outer end, and an integrally formed hollow end projecting outwardly in the center of the outer end; A planetary power transmission gear meshing with the ring gear while being rotatably supported by a ring structure inserted into and fixed to both ring gears of the outer housing; A rotational planetary gear that is rotatably supported by the ring structure and meshes simultaneously with the sun gear and the power transmission planetary gear; The inner end is fixed to the wheelchair frame, the outer end is a structure formed with a plurality of protrusions integrally in the circumferential direction, the fixing shaft is arranged to pass through the center of the input element and the ring structure; A reverse prevention plate seated in an opening formed on an upper surface of the hollow end to allow forward rotation of the input element and block backward rotation; It provides a two-speed wheel including a transmission of the manual wheelchair, characterized in that configured to include.

The reverse prevention plate according to the present invention includes: a base plate having a rectangular plate shape, a mounting end protruding integrally at both ends of the base plate, and mounted at an opening inlet of the hollow end, and extending from one side of the rear end of the base plate, Characterized in that it consists of a reverse prevention stage disposed between the projections.

Preferably, the base plate is arranged to be concentric with the center of the fixed shaft, the reverse prevention end is characterized in that arranged between the projection while forming an eccentricity with the center of the fixed shaft.

In particular, the both ends of the inner end of the opening formed on the upper surface of the hollow end is characterized in that the mounting groove of the wedge cross-section is further mounted to the mounting end of the reverse prevention plate.

In addition, the outer diameter surface of the hollow end is a reverse prevention cover body is mounted to the front and rear, and the inner pressure surface of the reverse prevention cover body is integrally attached to the elastic pressing end to stand at the inclination angle of the mounting groove by pressing the reverse prevention plate. It features.

In addition, the support plate is bolted to the mounting hole of the input element, characterized in that the second hand rim for the shift driving operation is mounted on the outer peripheral surface of the support plate.

Through the above problem solving means, the present invention provides the following effects.

According to the present invention, the transmission is equipped with a planetary gear set on the wheel axle of the wheelchair, and the second hand rim which can be operated when driving on a slope connected with the planetary gear set to hold and push the second hand rim 1/2 With only a force of 1/3 to 1/3, the wheel can be easily driven forward based on the torque increase and deceleration of the transmission.

Of course, when driving flat, the forward driving may be made by the operation of holding and pushing the first hand rim connected to the wheel for the wheelchair.

In particular, when the wheel is moved by operating the reverse prevention cover body when driving on the ramp using the transmission, the wheel is prevented from reversing immediately even when the second hand rim is released, thereby further increasing safety and convenience for driving on the ramp of the wheelchair. Can be.

1 and 2 is a perspective view showing a transmission device for a wheelchair according to the present invention,

Figure 3a and Figure 3b shows a transmission for a wheelchair according to the invention, Figure 3a shows a normal (flat) operating state, Figure 3b is a cross-sectional view showing a shift operation state when driving on a ramp,

4 is a front view showing the gear meshing state of the transmission for wheelchairs according to the present invention;

5 and 6 are perspective views illustrating a state of a two-speed wheel including a transmission for a wheelchair according to the present invention;

Figure 7 is a cross-sectional view illustrating the allowable movement of the backward prevention plate during the forward driving, while driving the ramp of the wheelchair transmission apparatus according to the present invention,

8 is a cross-sectional view illustrating the backward blocking operation of the backward prevention plate at the time of driving forward at the ramp of the wheelchair transmission apparatus according to the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

The present invention is equipped with a transmission having a planetary gear set on the wheel shaft of the wheelchair, based on the torque increase and deceleration operation of the transmission with only 1/2 to 1/3 of the force to hold and push the second hand connected to the transmission when driving on a slope The wheels can be easily driven forward to increase the climbing ability of the ramps two to three times with the same arm force, and the backward prevention function works even if the user releases his hand briefly from the hand rim while driving the wheelchair forward. The main point is to prevent the wheelchair from slipping in the backward direction of the ramp.

To this end, in addition to the point that the first hand rim 15 for normal driving operation is integrally connected to the inner ring of the wheel 10 for wheelchairs as shown in FIGS. 1 and 2, and FIGS. 5 and 6. A separate transmission is mounted on the central fixed shaft of 10), and at the same time, a second hand rim 18 for directly operating power by a user is connected to the transmission.

As one configuration of the transmission, both ends of the cylindrical outer housing 20 is provided, the outer end portion of the outer housing 20, the mounting end formed with a plurality of wheel fitting holes 26 at equal intervals ( 24) is integrally formed.

Thus, the inner end of each of the spokes 12 connected to the inner end of the wheel 10 for the wheelchair 10 is integrally fixed to the wheel fitting hole 26 formed in the mounting end 24 of the outer housing 20.

In particular, the ring gear 22 is integrally formed along the circumferential direction on the inner diameter surface of the outer housing 20, and preferably, the ring gear 22 has a center in the entire width section of the inner diameter surface of the outer housing 20. It is formed on the area side.

Next, the input element 30 is inserted into and mounted from the outside of the outer housing 20.

As shown in FIGS. 3A and 3B, the input element 30 is a structure for initial torque input when driving on a slope, and the sun gear 32 facing the ring gear 22 on the outer diameter surface of the inner end thereof is provided. The outer circumferential surface of the outer end is provided with a mounting hole 34 for connection with the second hand rim 18 which serves as a user's driving operation knob during shifting (when running at an inclined slope). The hollow end 36 is further protruded is provided with a structure formed integrally.

At this time, the ring structure 40 is inserted and fixed to both ring gear 22 of the outer housing 20, the ring structure 40 is formed in a ring shape to support the planetary gear.

Therefore, the power transmission planetary gear 42 is rotatably supported by the ring structure 40 and meshes with the ring gear 22, and the turning planetary gear 44 is rotatably rotated by the ring structure 40. While being supported, it is engaged with the sun gear 32 and the planetary gear 42 for power transmission at the same time.

The reason for adopting two types of planetary gears, such as the directional planetary gear 44 and the power transmission planetary gear 42, is that a force for forward driving is input through the input element 30 during driving on the slope and the sun gear 32 is adopted. Is rotated in the forward travel direction, the ring gear 22, which is an output gear, can also be rotated in the same forward travel direction.

Accordingly, in addition to the power transmission planetary gear 42 which transmits the rotational force of the sun gear 32 to the ring gear 22, the direction of switching the rotation direction of the ring gear 22 is the same as the forward traveling rotation direction of the sun gear 32. The conversion planetary gear 44 is adopted.

At this time, the fixed shaft 50 is arranged across the center of the input element 30 and the ring structure 40, the inner end of the fixed shaft 50 is fixed integrally to the wheelchair frame 14, A plurality of protrusions 52 are integrally formed at the outer end along the circumferential direction.

On the other hand, a rectangular opening 37 is formed in the upper surface of the hollow end 36, the opening 37 for the reverse prevention that allows the forward direction rotation of the input element body 30, while blocking the reverse direction rotation The plate 60 is mounted.

As shown in FIG. 1, the anti-retraction plate 60 protrudes integrally from both ends of the base plate 62 having a rectangular plate shape arranged in the opening 37 and the front end of the base plate 62. A reverse prevention stage 66 extending between the mounting end 64 mounted above the opening 37 of the opening 36 and the protrusion 52 of the fixed shaft 50 extending from one side of the rear end of the base plate 62. It is provided with an integrated structure.

At this time, both ends of the inner end of the opening 37 formed on the upper surface of the hollow end 36 is formed with a groove 38 of the wedge cross section on which the mounting end 64 of the anti-retraction plate 60 is mounted. The inclined surface of the mounting groove 38 is formed to be inclined downward from the outside inward.

Accordingly, the base plate 62 and the reverse prevention end 66 of the reverse prevention plate 60 are inserted into the opening 37 of the hollow end 36 so that the base plate 62 is the outer circumferential surface of the fixed shaft 50. To be seated in a horizontal state, the mounting end 64 is mounted to the mounting groove 38, and also the reverse prevention stage 66 is arranged between the projections 52 of the fixed shaft 50.

In particular, the base plate 62 is arranged to be concentric with the center of the fixed shaft 50, the reverse stop 66 is the projection of the fixed shaft 50 while forming an eccentricity with the center of the fixed shaft 50 By being arranged between 52, the bottom surface of the reverse prevention stage 66 is in a state slightly floating from the outer diameter surface between the projections 52 of the fixed shaft 50.

According to the present invention, as a means for selecting the shift running on the ramp and the shiftless travel on the plain, the reverse prevention cover body 70 is mounted on the outer diameter surface of the hollow end 36 so as to be able to move forward and backward.

Preferably, a male thread (39) is formed at the outer diameter surface end of the hollow end (36), and a female thread (74) is screwed with the male thread (39) at the inner diameter surface end of the reverse cover (70). To form a, so that the backward prevention cover body 70 can be moved forward or backward by screw transfer.

At this time, by pressing the front portion of the reverse prevention plate 60 on the inner diameter surface of the reverse cover body 70, the mounting end 64 is in close contact with the inclined surface of the mounting groove 38, consequently the reverse prevention plate 60 The elastic pressing stage 72 is mounted integrally so that) is set at the inclined surface angle of the mounting groove 38.

Meanwhile, a disc-shaped support plate 16 is fastened by bolts to the mounting hole 34 of the input element 30, and a second shift driving operation that can be held by a user by the user on the outer circumferential surface of the support plate 16. The hand rim 18 is assembled integrally.

Accordingly, when the second hand rim 18 for shift driving operation is held and pushed, torque and force for shifting are input to the input element 30 through the support plate 16.

Here, the operation flow for the two-stage wheel including the transmission of the manual wheelchair of the present invention based on the configuration as described above are as follows.

평상시 주행(무변속 주행)Normal driving (variable speed running)

In a situation such as flat land, a conventional manual wheelchair is used, without shifting.

To this end, as shown in FIG. 3A, when the screw is moved forward while the reverse cover member 70 is screwed forward, the elastic pressing end 72 attached to the inner diameter surface of the reverse cover member 70 also moves forward. By pressing the front portion of the prevention plate 60, the mounting end 64 of the backward prevention plate 60 is in close contact with the inclined surface of the mounting groove 38, at the same time the reverse prevention plate 60 itself is the mounting groove 38 It is in a state of being erected at an inclined plane angle of.

Therefore, the rear end portion of the reverse prevention plate 60, that is, the reverse prevention end 66 is lifted up while being spaced apart from the protrusion 52 of the fixed shaft 50, and eventually the reverse prevention end 66. And interference between the protrusions 52 of the fixed shaft 50 do not occur at all.

Accordingly, when the user sitting on the wheelchair grabs the first hand rim 15 and pushes it forward, the wheel 10 connected to the first hand rim 15 makes a cloud movement in the forward direction, thereby driving the wheelchair forward. This is made, on the contrary, if the user sitting on the wheelchair to hold the first hand rim (15) and pushed to the rear, the wheel 10 is connected to the first hand rim (15) to the cloud movement in the backward direction, Reverse travel is made.

When the wheelchair is reversed in the non-shifting state, the anti-retraction plate 60 including the input element 30 together with the wheel 10 also rotates in the reverse direction, but as shown in FIG. 3A, the anti-retraction plate 60 is shown. Is obliquely erected so that no interference between the reverse prevention stage 66 and the projection 52 of the fixed shaft 50 is not generated at all, the backward running of the wheelchair is made easy.

경사로 주행(변속 주행)Ramp driving (shifting)

When driving on a slope, when the reverse movement while screwing the reverse cover cover 70, the elastic pressing end 72 attached to the inner diameter surface of the reverse cover (70) is also reversed while pressing the rear portion of the reverse prevention plate 60. As a result, as shown in the accompanying FIG. 3B, the reverse prevention plate 60, which has been erected at the inclined plane angle of the mounting groove 38, becomes horizontal.

Subsequently, when the user sitting on the wheelchair grabs the second hand rim 18 for shift driving operation and pushes it in the forward direction, the torque and the force for the shift are input to the input element 30 through the support plate 16. The forward rotation of the element 30 is made.

At the same time, when the input element 30 is rotated in the forward direction about the fixed shaft 50 in the fixed state, the sun gear 32 formed at the inner end of the input element 30 is in the forward direction. At the same time, the hollow end 36 formed at the outer end also rotates in the forward direction.

At this time, if the level is maintained in the opening 37 of the hollow end 36, the backward preventing plate 60 is also rotated in the forward direction with the input element 30, at the same time shown in Figure 7 As the projection 52 of the fixed shaft 50 slides in close contact with the bottom surface of the reverse prevention stage 66 of the reverse prevention plate 60, the projection 52 of the fixed shaft 50 eventually retracts. Since the backward prevention end 66 of the prevention plate 60 is not restrained, the forward direction rotation of the input element 30 is easily performed.

Therefore, the transmission gear planetary gear 42 is rotated in the forward direction of the input element body 30 by the rotation direction switching operation of the rotational planetary gear 44 engaged with the sun gear 32 at the same time. Is rotated in the same forward direction as the sun gear 32, and the ring gear 22 in the outer housing 20 which is subsequently engaged with the power transmission planetary gear 42 rotates in the forward direction, resulting in an external housing 20 At the same time as to rotate in the forward direction, the wheel 10 connected by the outer housing 20 and the spokes 12 is rotated in the forward direction, the wheelchair forward running on the ramp is made.

In this way, the user pushes the second hand rim 18 in the forward direction and at the same time, the planetary gear 44 and the power transmission for direction change by a small force (torque) input to the sun gear 32 of the input element 30. Since the planetary gear 42 rotates and the ring gear 22 rotates in the forward direction, the torque increasing effect is exerted, so that the wheels are moved forward with only 1/2 to 1/3 of the force on the slope. Can be driven.

In particular, according to the present invention, even if the user puts the second hand rim 18 during driving on the slope, the wheel 10 including the input element 30 does not rotate in the reverse direction, thereby increasing user convenience.

That is, as shown in the accompanying FIG. 8, even when the user places the second hand rim 18 while driving on a slope, when the user keeps the level in the opening 37 of the hollow end 36 of the input element 30, the seat is seated. The reverse prevention stage 66 of the reverse prevention plate 60 is caught by the projections 52 of the fixed shaft 50, so that it does not rotate in the reverse direction.

As a result, since the shift and the forward driving of the wheelchair are easily performed when driving on the slope, and the reverse (backward) driving is prevented at the same time, the user's convenience for running the ramp on the wheelchair can be greatly increased.

10: wheel 12: wheel

14: wheelchair frame 15: first hand rim

16: support plate 18: second hand rim

20: external housing 22: ring gear

24: mounting end 26: wheel fitting hole

30: input element 32: sun gear

34: mounting hole 36: hollow end

37: opening 38: mounting groove

39: male thread 40: ring structure

42: planetary gear for power transmission 44: planetary gear for direction change

50: fixed shaft 52: protrusion

60: reverse plate 62: base plate

64: mounting stage 66: reverse prevention stage

70: cover for preventing reverse 72: elastic pressing end

74: female thread

Claims

Wheelchair wheel 10;

A first hand rim 15 installed on an inner ring of the wheel 10 for the wheelchair to manually perform a driving operation;

A transmission installed at a central fixed shaft of the wheel 10;

A second hand rim 18 mounted to the transmission, the user being manipulated to directly input power to the transmission;

Gearbox,

An outer housing 20 to which the spokes 12 of the wheelchair wheel 10 are connected;

A ring gear 22 formed integrally with the inner diameter surface of the outer housing 20;

Sun gear 32 is formed on the outer diameter surface of the inner end, the mounting hole 34 for the connection with the second hand rim is formed on the outer peripheral surface of the outer end, hollow end 36 protruding to the outside in the center of the outer end An integrally formed input element body 30;

A power transmission planetary gear 42 engaged with the ring gear 22 while rotatably supported by the ring structure 40 inserted into and fixed to both ring gears 22 of the outer housing 20;

A rotational planetary gear 44 which is rotatably supported by the ring structure 40 and simultaneously engaged with the sun gear 32 and the power transmission planetary gear 42;

The inner end is fixed to the wheelchair frame 14, the outer end is a structure in which a plurality of protrusions 52 are integrally formed along the circumferential direction, arranged through the center of the input element 30 and the ring structure 40 Fixed shaft 50 and;

A reverse prevention plate 60 seated in an opening 37 formed on the upper surface of the hollow end 36 to allow forward rotation of the input element body 30 and block backward rotation;

Through a configuration comprising a two-speed wheel comprising a transmission of a manual wheelchair, characterized in that the first wheel is improved to a two-speed wheel including a transmission.
The method according to claim 1,

The reverse prevention plate 60 is:

A base plate 62 in the form of a square plate;

A protruding end 64 integrally formed on both ends of the base plate 62 and mounted on the inlet of the opening 37 of the hollow end 36;

An anti-retraction end 66 extending from a rear end side of the base plate 62 and disposed between the protrusions 52 of the fixed shaft 50;

Two-speed wheel including a shift of the manual wheelchair, characterized in that consisting of.
The method according to claim 2,

The base plate 62 is arranged concentrically with the center of the fixed shaft 50, the reverse prevention end 66 is characterized in that it is arranged between the projection 52 while forming an eccentricity with the center of the fixed shaft (50). Two-speed wheel with gearshift for manual wheelchairs.
The method according to claim 1,

On both ends of the inner end of the opening 37 formed on the upper surface of the hollow end 36, characterized in that the mounting groove 38 of the wedge cross-section is further formed on which the mounting end 64 of the anti-retraction plate 60 is further formed. Two-speed wheel with wheelchair shift.
The method according to claim 1 or 4,

The reverse prevention cover body 70 is mounted on the outer diameter surface of the hollow end 36 so as to move forward and backward, and the reverse prevention plate 60 is pressed on the inner diameter surface of the reverse prevention cover body 70 by the mounting groove 38. Two-stage wheel including the transmission of the manual wheelchair, characterized in that the elastic pressing stage 72 is integrally attached to stand at an inclination angle.
The method according to claim 1,

The support plate 16 is fastened by bolts to the mounting hole 34 of the input element 30, and the second hand rim 18 for shift driving operation is mounted on the outer circumferential surface of the support plate 16. Two-speed wheel with wheelchair shift.
The method according to claim 1,

Two-speed wheel including a manual wheelchair transmission, characterized in that the mounting end 24 is formed integrally with a plurality of wheel fitting holes 26 at equal intervals on both outer end portions of the outer housing (20).