JPH0624579Y2 - Bearing structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial field of application> The present invention relates to a bearing structure for inserting and holding a shaft.

<Prior Art> For example, a wheel used in a stroller or a shopping car is configured such that an axle is inserted into and held by a wheel body that is a bearing member.
As shown in the figure, the axle 3 is inserted into the shaft insertion hole 2 of the wheel body 1, and a retaining protrusion 4 is provided near the wheel body 1 of the axle 3 by caulking or the like, and a space between the retaining protrusion 4 and the wheel body 1 is provided. A pair of left and right washers 5 are externally fitted to the wheel 3 so as to be positioned at, and the washer 5 restricts the axial movement of the axle 3 and the wheel body 1.

<Problems to be Solved by the Invention> Therefore, in the conventional case, in order to insert and hold the axle 3 in the wheel body 1, after inserting the axle 3 into the shaft insertion hole 2 of the wheel body 1, the washer 5 is attached to the axle 3. Outer fit, then axle 3
Since it is necessary to form the retaining projections 4 on both sides of the wheel body 1 by caulking or the like, the work of attaching the axle 3 to the wheel body 1 is very troublesome.

SUMMARY OF THE INVENTION In view of the above problems, the present invention is to make it possible to easily attach a shaft to a bearing member.

<Means for Solving the Problems> The technical means of the present invention for solving this technical problem is the shaft 1
Bearing member 12, 34 having a shaft insertion hole 18 through which 7, 33 is inserted
And a plate-like retaining ring 13 having a through hole 23 through which the shafts 17 and 33 are inserted.
The inner peripheral portion of the retaining ring 13 is slidable in the axial direction with respect to the shafts 17, 33, and engages with the circumferential groove 25 of the shafts 17, 33 to regulate the sliding in the axial direction. As described above, the plurality of notches 24 are radially provided, and the bearing members 12 and 34 insert the retaining ring 13 such that the inner peripheral edge portion of the retaining ring 13 projects annularly in the shaft insertion hole 18 at an intermediate portion in the axial direction. Then, it is formed by molding.

<Operation> When mounting the shafts 17,33 on the bearing members 12,24, the bearing members 12,3
It suffices to simply insert the shafts 17, 33 having the circumferential groove 25 formed in the shaft insertion hole 18 of 4 in the direction of the arrow a. The shafts 17, 33 are inserted into the through holes 23 of the retaining ring 13 and The inner peripheral portion is elastically deformed in the direction of the arrow a and is slid in the axial direction with respect to the shafts 17 and 33, and then the retaining ring 13
The inner peripheral edge portion of the shaft 17 engages with the circumferential groove 25 of the shafts 17, 33, whereby the shaft 1
Axial movement of 7,33 is restricted with respect to the bearing members 12,34.

<Embodiment> Hereinafter, the present invention will be described with reference to the illustrated embodiment.
In FIG. 2 and FIG. 2, reference numeral 11 denotes a wheel used in a stroller or a shopping car, which is a wheel body 12 which is a bearing member.
And a plate-like retaining ring 13.

The wheel body 12 integrally includes a tubular mounting portion 14, a plurality of spoke portions 15 radially protruding from the mounting portion 14, and an annular rim portion 16 that connects the outer ends of the spoke portions 15 to each other. Part 16
A tire (not shown) is fitted on the outside.

The mounting portion 14 of the wheel body 12 has a shaft insertion hole through which the axle 17 is inserted.
18 has a small-diameter portion 19 formed to have substantially the same diameter as the axle 17, from one end in the axial direction of the shaft insertion hole 18 to the middle portion on the other end side,
The other end of the shaft insertion hole 18 has a large diameter portion that is larger than the diameter of the axle 17.
It is said to be 20.

The snap ring 13 is made of elastic metal and is formed in a disc shape having a through hole 23 into which the axle 17 is inserted. Retaining ring 13
The inner peripheral part of is conically inclined to one side in the axial direction,
A plurality of notches 24 are radially formed on the inner peripheral portion of the retaining ring 13, whereby the retaining ring 13 becomes slidable in the axial direction with respect to the axle 17 and engages with the circumferential groove 25 of the axle 17. The vertical sliding is regulated.

The wheel body 12 is made of synthetic resin, die cast,
The snap ring 13 is made of aluminum light alloy or the like, and is formed by inserting the snap ring 13 so that the inner peripheral edge of the snap ring 13 projects annularly into the shaft insertion hole 18 at an intermediate portion in the axial direction. The retaining ring 13 is located at the boundary between the large diameter portion 20 and the small diameter portion 19 of the shaft insertion hole 18, and the inner peripheral portion of the retaining ring 13 is elastically deformable toward the large diameter portion 20 side.

It should be noted that the axle 17 is shown by the arrow
By being inserted in the direction, the axle 17 is inserted and held in the wheel body 12 so as to be rotatable about its axis.

FIG. 4 shows another embodiment, in which one end of the wheel body 12 in the axial direction (the side of the large diameter portion 20) is integrally provided with a sealing wall 26 so as to close the shaft insertion hole 18. In this case, , Blocking wall 26 is axle 17
The movement of the wheel 11 in the direction of the arrow a is restricted to prevent the inner peripheral edge portion of the retaining ring 13 from being accidentally pulled out from the circumferential groove 25, and the outer appearance of the wheel 11 so that the end portion of the axle 17 cannot be seen from the outside. The appearance is good.

FIG. 5 shows another embodiment, in which a plurality of retaining rings 13 are provided in the axial direction of the wheel body 12, and the retaining rings 13 are provided in a plurality of circumferential grooves 25 formed on the axle 17 corresponding to the retaining rings 13. By engaging the peripheral portions of the above, the plurality of retaining rings 13 can prevent the axle shaft 17 from being pulled out in multiple stages. Further, the shaft insertion hole 18 has substantially the same diameter as the axle 17 over the entire axial length. The other points are the same as those of the above-mentioned embodiment.

FIG. 6 shows another embodiment in which the present invention is applied to a pedal device of a bicycle. In FIG. 6, reference numeral 31 is a crank, 32 is a pedal, and a pedal shaft detachably screwed to the tip of the crank 31.
33 and a pedal body 34 which is a bearing member rotatably held on the pedal shaft 33. The pedal body 34 is formed by inserting the retaining ring 13 in the same manner as the wheel body 12 of the above embodiment, and the pedal body 34 is provided with a shaft insertion hole 18 having a small diameter portion 19 and a large diameter portion 20. Large diameter part 20 and small diameter part
The retaining ring 13 is embedded so as to be located between the retaining ring 13 and the retaining ring 13. Then, by inserting the pedal shaft 33 in which the peripheral groove 25 is formed into the shaft insertion hole 18 of the pedal body 34, the inner peripheral portion of the retaining ring 13 is engaged with the peripheral groove 25 and the pedal body is formed by the retaining ring 13. The axial movement of the pedal shaft 33 with respect to the pedal 34 can be restricted.

Although the inner peripheral portion of the retaining ring 13 is inclined in the axial direction in the above-described embodiment, the inner peripheral portion of the retaining ring 13 is not inclined as shown in FIG. It may be in a state.

Further, in the above-described embodiment, the present invention is applied to the wheel or pedal device, and the wheel body 12 or the pedal body 34, which is the bearing member, is rotatable with respect to the shafts 17, 33, but the present invention is not limited to these. Alternatively, as long as it is a bearing member having a shaft insertion hole 18 through which the shaft is inserted, a device other than a wheel or a pedal device can be applied and the bearing member may be a member that insertably holds the shaft so that it cannot rotate.

<Effect of the Invention> According to the present invention, the shafts 17 and 33 having the circumferential grooves 25 are simply inserted into the shaft insertion holes 18 of the bearing members 12 and 34, and the retaining rings are fitted to the circumferential grooves 25 of the shafts 17 and 33. The inner peripheral edge portion of 13 can be engaged to restrict axial movement of the shafts 17, 33 with respect to the bearing members 12, 34, so that the shafts 17, 33 can be attached to the bearing members 12, 34 very easily. It is possible and its practical effect is remarkable.

[Brief description of drawings]

1 to 3 show an embodiment of the present invention. FIG. 1 is a front view of a wheel, FIG. 2 is a sectional view of the same, and FIG. 3 is a front view of a retaining ring. 4 to 7 are sectional views showing other embodiments. FIG. 8 is a sectional view showing a conventional example. 12 ... Wheel body, 13 ... Snap ring, 17 ... Axle, 18 ... Axle insertion hole, 23
… Insert holes, 24… notches, 25… circumferential grooves, 33… pedal shaft, 34… pedal body.

Claims (1)

[Scope of utility model registration request] A bearing member (12) (34) having a shaft insertion hole (18) through which the shaft (17) (33) is inserted, and a through hole through which the shaft (17) (33) is inserted.
And a plate-like retaining ring (13) having (23), which is axially slidable with respect to the shafts (17) and (33) on the inner periphery of the retaining ring (13) and the shaft (17). A plurality of notches (24) are provided radially so as to engage with the circumferential groove (25) of (33) and regulate the sliding in the axial direction, and the bearing members (12) (34) are Stop ring (13) so that the inner peripheral edge of the stop ring (13) projects annularly into the shaft insertion hole (18) in the middle of the direction.
Bearing structure characterized by being formed by inserting and molding.