JPH089456Y2 - Bending rotary shaft bearing - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a bearing that can be easily assembled to a bending rotary shaft used in a swing, a tricycle, or the like.

(Prior Art) Conventionally, a rotary shaft bent in an L shape is fitted and supported by a swing rod, an upper shaft member, a hawk bearing member of a tricycle for children, or the like.

By the way, when the bending rotary shaft is fitted into the bearing member, if the bearing hole of the normal bearing member and the shaft diameter of the bending rotary shaft are substantially the same, the bearing member cannot pass through the bending portion. As a solution to this, a method in which the diameter of the bearing hole is increased in order to easily pass the bent portion, a rotating shaft is preliminarily linear, and after inserting into the bearing member, a method of bending the rotating shaft, As disclosed in Japanese Utility Model Publication No. 2-12151, there is known a method in which both ends of a bearing hole of a bearing member are made large and a central portion thereof is made small.

However, in the above case, if the diameter of the shaft fitting insertion hole is increased, a gap is created between the inserted bending rotary shaft and the bearing hole, and rattling occurs. In this case, since the rotary shaft is bent after the bearing member is inserted and inserted, the production efficiency is poor, and the paint on the rotary shaft is easily peeled off or scratched. In addition, in the case of, since the bearing member bears at the center of the bearing hole, the contact area between the bending rotary shaft and the bearing hole is small, and it easily wears. The gap may be clogged with sand, pebbles, etc., causing a problem with durability.

(Object of the Invention) The present invention has been made in order to solve the above-mentioned problems, and it is easy to assemble the bending rotary shaft, does not cause rattling, and has a contact area with the bending rotary shaft. The purpose of the present invention is to provide a bearing for a bending rotary shaft that does not cause abrasion due to reduction and clogging due to small stones.

(Means for Solving the Problem) In order to achieve the above-mentioned object, a bearing for a bending rotary shaft according to the present invention comprises a bearing main body having a space portion having a size capable of passing through the bending portion of the bending rotary shaft, and the above space. A bearing member fitted into the bearing member, and a protrusion is formed on the inner peripheral surface of the space of the bearing body, while a notch corresponding to the protrusion is formed on the bearing member. The bearing hole of the bending rotary shaft is formed by the inner peripheral surface of the and the inner peripheral surface of the convex portion.

(Operation of the Invention) In the above configuration, when the bending rotary shaft is to be borne, the bending rotary shaft is passed along the space of the bearing body while the bearing member is engaged with the bending rotary shaft from the notch to form a bearing. The member is fitted into the space. As a result, a bearing hole is formed by the inner peripheral surface of the bearing member and the inner peripheral surface of the convex portion of the bearing body, and the bending rotary shaft is supported in the bearing hole.

(Embodiment) An embodiment of the present invention will be described below with reference to the drawings.

1 is a perspective view of a tricycle for infants using the bearing of the present invention, FIG. 2 is a cross-sectional view of the essential structure, FIGS. 3 and 4 are cross-sectional views of the bearing, and FIG. 5 is the bearing. A front view of the member, FIG. 6 is a sectional view thereof, and FIGS. 7 and 8 are explanatory views showing an assembling method.

In the figure, reference numeral 1 indicates a hawk bearing member in the tricycle A. This hawk bearing member 1 has a hawk fitting insertion portion 3 ′ into which the hawk 2 of the vehicle body is inserted, and a bearing main body 3 at its lower portion. The bearing body 3 has a larger diameter than that of the bending rotary shaft 4 formed of a crankshaft and has a bent portion of the bending rotary shaft 4.
A space 5 having a size capable of passing through 4a is formed, and a projection 6 is formed on the inner periphery of the space 5 so as to project. This convex portion 6
As shown in FIG. 3, the inner peripheral surface of the has an arc shape, and its radius of curvature is substantially the same as the diameter of the bending rotation shaft 4. Further, the width of the convex portion 6 is set to about 1/3 of the inner circumference of the space portion 5, and the left and right ends are slightly exposed to the outside of the space portion.

A ridge portion 8 is formed on the inner peripheral surface of the space portion 5 in the circumferential direction.

The bearing main body 3 of the hawk bearing member 1 constitutes a bearing of the bending rotary shaft 4 together with the bearing member 7. Incidentally, in the normal case, the hawk bearing member 1 and the bearing member 7
Is made of synthetic resin, and the bending rotary shaft 4 is made of metal.

As shown in FIGS. 5 and 6, the bearing member 7 has an outer diameter that is slightly smaller than the diameter of the space portion 5 and an inner diameter that is substantially the same as the shaft diameter of the bending rotary shaft 4. A cutout 9 having a size corresponding to 6 is formed in a C-shaped cross section. The notch 9 is about 1/3 of the circumference of the space 5 like the protrusion 6.
The notch 9 is set so as to be fitted into the convex portion 6 when fitted into the space 5. Further, along the outer peripheral surface of the bearing member 7, the protrusion 10 that engages with the protrusion 8 of the space 5 and the retaining protrusion 11 having an arcuate cross section are formed in parallel, and the retaining protrusion is also formed. The peripheral edge corners on the 11 side are arcuate to facilitate insertion into the space 5.

The cross-sectional shape of the retaining ridge 11 may be triangular or the like. Further, the retaining ridges and the ridge portions 8 may be formed on the bearing body 1 and the bearing member 7 in the opposite manner to the above.

A tricycle A shown in FIG. 1 is provided with a hawk 2 connected to a handlebar 13 at a front portion of a frame 12, and a front wheel 14 is attached to the hawk 2.
, A pair of rear wheels 15, 15 are attached to the rear portion of the frame 12, and a saddle 16 is attached to the middle portion of the frame 12. A pedal 17 is attached to the bending rotary shaft 4 of the hawk bearing member 1.

In the above structure, the bending rotary shaft 4 is attached to the hawk bearing member 1.
7, the bearing member 7 is engaged with one horizontal portion of the bending rotary shaft 4, the bearing member 1 is inserted from the other horizontal portion, and the inside of the space portion 5 is inserted as shown in FIG. And the bearing member 7 is fitted to the horizontal portion of the bending rotary shaft 4 through the bending portion 4a. At this time, the convex portion 6 provided in the space portion 5 of the bearing body 3 matches the inside of the cutout portion 9 of the bearing member 7, and the retaining ridge 11 and the protrusion portion 10 of the bearing member 7 form the ridge portion of the space portion 5. Stopping at the portion 8, the bearing member 7 is fitted into the space portion 5. As a result, a bearing hole for the bending rotary shaft 4 is formed by the inner peripheral surface of the bearing member 7 and the inner peripheral surface of the convex portion 6, and the bending rotary shaft 4 is rotatably supported by the bearing hole.

In addition, as shown in FIG. 8, after the bending rotary shaft 4 is passed through the space 5 of the bearing main body 3 of the hawk bearing member 1 in advance, the bearing member 7 is moved along the horizontal portion of the bending rotary shaft 4. Insert into the bearing body 3. At this time, the bearing member 7
The notch 9 is fitted into the protrusion 6 in the space 5, and the retaining projection 11
The protrusion 10 is stopped to the protrusion 8 of the space 5 to prevent the bearing member 7 from slipping off, and the bending rotary shaft 4 is supported by the bearing hole formed by the protrusion 6 and the bearing member 7.

Although the above embodiment shows a hawk bearing for a child's tricycle, the bearing of the present invention can also be used as an upper bearing of a swing rod of a swing, a crank bearing of a foot-operated child's vehicle, and the like. Of course.

(Effect of the Invention) According to the present invention, the bearing member can be easily attached to the bending rotary shaft, and the work efficiency is improved. Further, since the bearing hole is formed by the inner peripheral surface of the bearing member and the inner peripheral surface of the convex portion of the bearing main body, the bending rotary shaft contacts the entire surface of the bearing hole, so that a stable bearing state is obtained, and The pebbles will not be clogged, and the bearing member will be less likely to wear and the durability will be improved.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a child's tricycle using a bearing to which a bending rotary shaft according to the present invention is assembled, FIG. 2 is a sectional view in use, and FIG. 3 is a longitudinal sectional view of the bearing. Fig. 4 is a vertical sectional front view of the bearing, Fig. 5 is a side view of the bearing member, Fig. 6 is a sectional view of the bearing member, and Figs. 7 and 8 are explanatory views showing an assembling method. . Reference numeral 1 ... Bearing, 3 ... Bearing main body, 4 ... Bending rotary shaft,
5 ... space part, 6 ... convex part, 7 ... bearing member, 9
...... Notch

Claims (1)

[Scope of utility model registration request] 1. A bearing main body having a space portion having a size capable of passing through a bent portion of a bending rotary shaft, and a bearing member fitted in the space portion, the inner peripheral surface of the space portion of the bearing main body. While forming a protrusion, the bearing member is formed with a notch corresponding to the protrusion, and the bearing hole of the bending rotary shaft is formed by the inner peripheral surface of the bearing member and the inner peripheral surface of the protrusion. A bent rotary shaft bearing characterized by being formed.