JP4127347B2 - Wheels for casters - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a wheel for a caster to be attached to a trunk or a transport vehicle.
[0002]
[Prior art]
FIG. 1 shows an example of the structure of a caster attached to a desired instrument or instrument, and the caster 10 is composed of a mounting bracket 20 and a wheel 30. Reference numeral 21 denotes a desired instrument, an attachment part to an object, 22 denotes a wheel holding part, 23 denotes an axle, and 24 denotes a nut for fixing the axle 23 to the wheel holding part 22. The wheel 30 is formed of nylon for the wheel portion and urethane for the tread portion.
[0003]
[Problems to be solved by the invention]
As mentioned above, the wheels are made of urethane, nylon, etc., so if they become hot after use, or if they are used in a hot place, the nylon softens and sticks to the axle and functions as a caster. The problem of not being able to fulfill is inevitable.
[0004]
If it was going to prevent it, an expensive bearing had to be used, and there was a fault that it became not cost-effective as a caster.
[0005]
[Means for Solving the Problems]
In order to eliminate the above-mentioned drawbacks, in the present invention, in a caster wheel, a hub recess is formed by surrounding the axle through hole in the hub portion of the wheel to form a hub recess, and the recess has a U-shaped cross section. A caster wheel is obtained in which a cap is tightly fitted so that a lubricant can be filled in a sealed space formed by the hub recess and the cap.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 2 is a perspective view of the wheel 30 of the present invention. In the hub 33 portion, a projection 35 is provided surrounding the axle through hole 34 to form a hub recess 36. 3 is a perspective view of the cap 40, and FIG. 4 is a cross-sectional view taken along the line AA of FIG. 3. The cap 40 has a substantially U-shaped cross section having a front surface 41 and a peripheral wall 42. A hole 43 is provided. The inner diameter of the hub recess 36 and the outer diameter of the cap 40 are made almost the same. As shown in FIG. If the sealed space formed at that time is filled with a lubricant, the lubricant sequentially flows between the axle through hole 34 of the hub 33 and the axle 23 to ensure smooth rotation of the axle and at the same time the temperature. The rise can be prevented.
[0007]
【Example】
2 is a perspective view of the wheel 30 of the present invention, in which 31 is a wheel portion of the wheel, 32 is a spoke portion, 33 is a hub, 34 is an axle through hole in the center of the hub, and 35 is an axle through hole in the hub portion. A projecting portion 36 provided surrounding the projecting portion 36 indicates a hub recess formed by the projecting portion 35.
[0008]
3 is a perspective view of a cap 40 tightly fitted in the hub recess 36, FIG. 4 is a cross-sectional view taken along the line AA of FIG. 3, 41 is a front surface, 42 is a peripheral wall formed at right angles to the front surface 41 , 43 is an axle through hole formed in the center of the front surface 41, and 44 is a recess formed by the front surface 41 and the peripheral wall.
[0009]
FIG. 5 is a sectional view showing a state of using the wheel of the present invention. The cap 40 is recessed in the hub so that the axle 23 penetrates the axle through hole 34 of the hub 33 and the axle through hole 43 of the cap 40. The place 36 is tightly fitted with the front surface 41 facing outside. (As described above, the inner diameter of the hub recess 36 is substantially equal to the outer shape of the cap 40).
[0010]
At that time, a lubricant is filled in a sealed space formed by the hub recess 36 and the cap 40. As in the illustrated example, when the height of the protrusion 35 and the peripheral wall 42 are equal, the space formed by the hub recess 36 and the cap 40 coincides with the recess 44 of the cap 40. The lubricant in the sealed space sequentially flows into the gap between the axle 23 and the axle through hole 34 of the hub 33, and the axle rotates smoothly. In addition, since the temperature of the wheel is prevented by this lubricant, it is possible to avoid the nylon sticking to the axle 23.
[0011]
2 and 5 show only one side surface of the wheel, it goes without saying that the both side surfaces of the wheel have the same configuration.
[0012]
【The invention's effect】
The caster wheel according to the present invention has the above-described configuration, and can prevent the wheel from becoming high temperature and ensure smooth rotation while having a very simple configuration.
[Brief description of the drawings]
1 is a perspective view showing an example of the structure of a caster. FIG. 2 is a perspective view of a wheel according to the present invention. FIG. 3 is a perspective view of a cap. FIG. 4 is a cross-sectional view taken along line AA in FIG. Sectional view showing the state of the material
DESCRIPTION OF SYMBOLS 10 Caster 20 Mounting bracket 21 Mounting part 22 Wheel holding part 23 Axle 24 Nut 30 Wheel 31 Wheel part 32 Spoke part 33 Hub 34 Axle through hole 35 Projection part 36 Hub recess 40 Cap 41 Front surface 42 Perimeter wall 43 Axle through hole 44 Recess

Claims (1)

A mounting bracket for mounting on the instrument, a wheel holding portion rotatably attached to the mounting bracket, an axle fixed to the wheel holding portion, a hub, a wheel portion and a spoke portion through which the axle passes. A caster comprising a wheel rotatably mounted on the axle by the hub and a cap for forming a sealed space filled with a lubricant between the hub and the axle. A protrusion that forms a hub recess around the axle, and the cap includes a cylindrical peripheral wall portion that closely fits the protrusion and an annular front surface portion through which the axle passes. Caster characterized by .

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