KR20170002747A - Easy to drive caster wheel - Google Patents

Abstract

The present invention relates to an easily operable caster wheel. The present invention comprises a support shaft, a drive gear, a bearing, a support pin, a driven gear, a connection shaft, a wheel, and a rotary pin. A load applied to the wheel is moved from a center of the wheel to an upper end of the advancing direction of the wheel to increase a rotational force of the wheel as the load applied to the wheel is heavier to enable the caster wheel to be smoothly moved at a small force, thereby easily moving furniture, a small transportation means, or a medical device in the preferred direction and to a preferred position.

Description

An easy-to-drive caster wheel

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a caster wheel construction, and more particularly to a caster wheel structure used in small-sized transportation means such as furniture and trolley, and medical equipment such as wheelchairs and hospital beds.

In general, a conventional caster wheel is small in size and easy to use, and has been widely used in furniture, small-sized transportation means, or medical equipment.

In addition, as shown in Fig. 1, the load acting on the wheel is applied in the direction of the center axis of the wheel, and the type (a) is further improved to move the load toward the center axis outside the central axis (B) which is easy to distribute the load and change direction.

However, even if the caster wheel structure as described above optimally distributes the load applied to the wheel, most of the load is transmitted to the wheel center shaft, and the load is transmitted to the wheel bottom which is in contact with the ground again, (Frictional force). Therefore, when the load applied to the caster wheel is large, the grounding force becomes strong. Therefore, when the weight of the user is heavy or the weight of the user who uses the wheelchair is heavy when the medical device such as a small carrier or a wheelchair is used, I have been.

SUMMARY OF THE INVENTION The present invention provides a caster wheel that can easily be moved in a desired direction with only a small force to easily drive the caster wheel.

In order to achieve the above object, a caster wheel according to the present invention is a caster wheel that can be easily driven. The caster wheel includes a support shaft and a support shaft. The support shaft supports the drive gear and the drive gear. A movable gear which is fixed to a vehicle, a medical device, or the like and is capable of converting a load received by a support shaft into a rotational force to be transmitted to a driving gear, and transmitting the rotational force; A wheel which is coupled to the drive gear through a connection shaft and is capable of moving forward or backward by a rotational force of the drive gear, a connection shaft configured to couple the wheel and the drive gear, And a support pin for supporting the support pin and the support pin.

The support shaft may include a support hole formed to support the movable gear by a support pin, a rotation hole formed to fix the drive gear, which receives the rotation force from the movable gear, with the rotation pin, And a clearance hole that is formed at a distance from the outer surface of the upper end of the support pin so as not to be transmitted to the rotation pin, wherein the drive gear includes a connection hole formed to be coupled with the wheel as a connection shaft And the coupling hole is formed so that the wheel can be coupled to the driving gear through a coupling shaft.

The grounding angle of the movable gear, which engages with the driving gear and converts the load into rotational force, transmits the grounding angle of 0 to 90 degrees or 270 to 90 degrees from the center of origin of the driving gear, And a range of 360 degrees.

The caster wheel that is easy to drive according to the present invention moves the load applied to the wheel from the center of the wheel to the upper end of the wheel in the forward direction of the wheel so that the rotational force of the wheel increases as the load applied to the wheel increases, It can be easily moved to a desired direction and position by attaching it to furniture, small transportation means or medical equipment.

1 is a general view of a conventional type caster wheel.
2 is an assembled view of a caster wheel which is easy to drive according to the present invention.
FIG. 3 is a detail view of a clearance hole of a caster wheel which is easy to drive according to the present invention.
4 is a detailed view of the grounding angle of the movable gear and the driving gear according to the present invention.
5 is a general view of a wheelchair using a caster wheel that is easy to drive according to the present invention.

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

2 is an assembled view of a caster wheel which is easy to drive according to the present invention.

The figure shows a support shaft 10, a movable gear 20, a bearing 30, a support pin 40, a drive gear 50, a connection shaft 60, a bearing 70, a wheel 80, A rotary shaft 90, a rotary shaft 100, and the like.

First, the bearing 30 is inserted into the support hole 21 of the movable gear 20, and the center of the bearing 30 is positioned between the supports 10a and 10b of the support shaft 10 so as to be aligned with the center of the support hole 11 After aligning, the aligning movable gear 20 is fitted to the support pin 40 and fixed.

The drive gear 50 is inserted into the connection hole 51 to fix the connection shaft 60 so that the drive gear 50 can be engaged with the fixed movable gear 20 and the drive gear 50 And the wheel 80 having the connecting hole 81 on both sides of the right and left sides of the wheel 80.

The bearing 70 is installed and integrated in the left and right fixing holes 61 of the coupled shaft 60 so that the center of the bearing 70 is aligned with the center of the rotation hole 12, A plurality of the driving gears 50 are fixed to the rotating pins 90 so as to be balanced with respect to the furniture, the small transportation means or the medical device, A caster wheel is formed.

FIG. 3 is a detail view of a clearance hole of a caster wheel which is easy to drive according to the present invention.

The figure shows an example in which the external load applied to the support shaft 10 is transmitted to the movable gear 20 to be converted into rotational force and the converted rotational force is transmitted to the drive gear 50, (12) in contact with the rotation pin (90) so as to be transmitted to the rotation pin (90) coupled to the rotation hole (12) of the drive gear 13) is further formed to prevent load dispersion.

When the clearance hole 13 is formed as described above, the rotation pin 90 can be fixed only to the upper end of the outer circumference of the rotation pin 90 without the load being transmitted.

4 is a detailed view of the grounding angle of the movable gear and the driving gear according to the present invention.

The figure is a summary of a process in which the movable gear 20 is connected to the support shaft 10 to transmit an external load to the drive gear 50 with a rotational force. The friction force of the external load is most effectively transmitted to the drive gear 50 This is the range that can be achieved.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is clearly understood that the same is by way of illustration and example only and is not to be construed as limiting the scope of the invention as defined by the appended claims. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention.

10: support shaft 51: connection hole
11: Support hole 60: Connection shaft
12: rotation hole 61: fixed hole
13: Clearance hole 70: Bearing
20: movable gear 80: wheel
21: Support hole 81: Connection hole
30: bearing 90: rotating pin
40: support pin 100: rotation shaft
50: drive gear

Claims (5)

A support shaft formed to be able to fix the movable gear and the drive gear with the support pin and the rotation pin, respectively; and
A movable gear which is connected to the support shaft by a support pin and is fixed to a furniture, a small transportation means or a medical instrument so that a load received by the support shaft can be converted into a rotational force by the drive gear, Wow
A driving gear connected to the inner side of the wheel to rotate the wheel, Wow
A wheel coupled to the driving gear by a connecting shaft and capable of advancing or retracting by a rotational force of the driving gear; and
A coupling shaft configured to couple the wheel and the driving gear; and
A rotation pin and a support pin for fixing the combined wheel and the movable gear to the support shaft, respectively; of
And a caster wheel
The method according to claim 1,
The support shaft includes: a support hole formed to support the movable gear with the support pin; and
A rotation hole formed to be able to fix a drive gear which is engaged with the movable gear and receives a rotational force by a rotation pin; and
A clearance hole formed apart from the outer surface of the upper end of the support pin so that a load received by the rotation hole from the support shaft is not transmitted to the rotation pin; of
And a caster wheel
The method according to claim 1,
The driving gear includes a connecting hole formed to be coupled with the wheel as a connecting shaft. of
And a caster wheel
The wheel may include a connection hole formed to be coupled to the driving gear through a connection shaft; of
And a caster wheel
The method according to claim 1,
The grounding angle of the movable gear, which engages with the driving gear and converts the load into a rotational force, transmits the rotational force of the driving gear to the ground. The grounding angle of the movable gear is 0 to 90 degrees or 270 to 360 degrees And a caster wheel

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