JPH0649951Y2 - Balance weight mounting structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Field of Industrial Application) The present invention relates to a balance weight mounting structure for mounting a balance weight on a wheel rim.

(Prior Art) In a wheel used for an automobile, in order to prevent uneven wear of the tire, after the tire is mounted on the wheel, an overall balance is taken to compensate for the wheel imbalance.

In order to balance such a wheel, conventionally, a balance weight made of lead lumps is attached to a wheel rim (consisting of a hub portion, a rim well portion, and a rim flange portion). Specifically, as shown in FIG. 3, lead (balance weight) d is engaged and attached to the rim flange portion b of the wheel rim a by using a claw fitting c.

However, the attachment of such a balance weight has a drawback that the lead d is exposed to the outside as it is.

(Problems to be solved by the invention) For this reason, there is a possibility that the wheel rim may come off due to an external factor, for example, a collision with a curb of the wheel rim, and the lead d exposed to the outside may impair the appearance. In particular, a lightweight wheel made of a light metal such as an aluminum wheel or a magnesium wheel, which has an excellent aesthetic appearance, remarkably deteriorates the appearance.

This invention was made with attention to such problems, and the purpose is to keep the balance weight at the optimum position without spoiling the appearance of the wheel and without separating due to external factors or centrifugal force. (EN) Provided is a balance weight mounting structure which can be securely mounted on a.

[Construction of the Invention] (Means and Actions for Solving Problems) An annular groove concentric with the shaft center is provided on the outer surface of the wheel rim,
A locking groove having a different cross-sectional shape is provided on the circumferential surface of the annular groove along the circumferential direction between the outer peripheral side and the inner peripheral side of the annular groove, and the outer peripheral side corresponding to the locking groove is provided in the locking groove. The balance weight is installed in the annular groove by elastically locking the claw tool having a different cross-sectional shape between the inner peripheral side and the inner peripheral side and brought into contact with the contact portion formed along the outer peripheral side peripheral surface of the annular groove. An annular cover is locked to the opening groove on the opening side of the stop groove to close the opening of the annular groove, and the balance weight is attached so that it cannot be seen from the outside.

(Embodiment) The present invention will be described below based on an embodiment shown in FIGS. 1 and 2. Reference numeral 1 denotes a wheel rim made of light metal, for example, aluminum, and 2 denotes a tire 2 mounted on the wheel rim 1. The wheel rim 1 is formed to have a hub portion 3, a rim well portion 4, and a rim flange portion 5. An annular groove (deep groove) 6 concentric with the wheel rim 1 is formed on the front side of the hub portion 3 as shown in FIG. A balance weight is built in the annular groove 6.

In this built-in structure, a groove 7 having a strip-shaped cross section for locking is formed along the circumferential direction on the inner peripheral surface of the annular groove 6 on the bottom side. Further, a concave groove 8 having a semicircular groove 8a on the outer peripheral side opposite to that (all of which correspond to a locking groove) is also formed along the circumferential direction to form a mounting seat, and this mounting seat is Lead 9 (corresponding to a balance weight) having a weight necessary for balancing is attached.

As a specific mounting structure of the lead 9, first, the lead 9 having an outer shape formed into an arc shape that can be housed in the annular groove 6 is used. In addition, as shown by the chain double-dashed line in FIG. 2, a plurality of types of lead 9 having different total lengths are prepared to change the weight required for balance. And on this lead 9,
A claw tool (10) made of a U-shaped fitted steel plate, having locking portions (11, 11) that can be engaged with and disengaged from the concave grooves (7, 8) is formed at the tip end.
That is, by inserting the claw tool 10 into the annular groove 6,
By locking 1, 11 in the concave groove 7 and the semicircular groove 8, the lead 9
The elastic force (spring force) of 10 is used to fix the ring groove 6 in the annular groove 6.

Further, a stopper portion 12 (corresponding to a contact portion), which comes into contact with the outer peripheral end of the lead 9 when the lead 9 is installed, is bulged and formed in the entire area immediately below the concave groove 8 so that the lead 9 can be rotated when the wheel rotates. Even if it is subjected to centrifugal force, it will not move to the outer peripheral side from that state.

Then, in the opening of the annular groove 6 containing the lead 9,
A resinous annular cover 13 for closing the opening is provided so as to be disengageable.

Then, when the balance weight is attached to the aluminum wheel, the lead 9 having a weight suitable for the balance compensation is selected and is inserted into the portion in the annular groove 6 for balancing. Then, when the locking portions 11 and 11 are inserted until they are locked with the concave grooves 7 and 7, the lead 9 is fixed by the elastic force of the claw tool 10. Of course, at this time, the lead 9 is set in close contact with the stopper portion 12. After that, the opening of the annular groove 6 may be closed with the cover 13.

Thus, the lead 9 can be attached in a state where it cannot be seen from the outside.

Therefore, it is possible to achieve balance without impairing the appearance of the wheel. Moreover, since the lead 9 is protected by the cover 13 and built in the wheel, the lead 9 does not come off from the wheel due to an external factor (contact with the lead 9).

Moreover, since the lead 9 is fixed in the annular groove 6 by the nail tool 10,
The deformation of lead 9 itself does not impair the balance. In addition, due to the restriction of the stopper portion 12, the lead 9 does not come off even if it receives a centrifugal force when the wheel rotates, and the reliability is high.

Further, a structure in which the lead 9 is attached by using annular concave grooves 7 and 8 having different cross-sectional shapes on the outer peripheral side and the inner peripheral side, and correspondingly, using a claw tool 10 having different cross-sectional shapes on the outer peripheral side and the inner peripheral side. By adopting, it is possible to prevent lead 9 from being erroneously assembled on the inner and outer circumferences and to securely attach lead 9.

In addition, since the stopper portion 12 that comes into contact with the lead 9 is formed along the circumferential direction of the annular groove 6, the lead 9 having a different size is used.
However, the contact with the stopper portion 12 is reliable, and even if the lead 9 having a different size is not contacted, the lead 9 will not come off due to the centrifugal force.

In addition, the annular groove 6 for accommodating the lead 9 is concentrically provided on the outer side surface of the wheel rim 1, so that the lead 9 can be reliably attached at the optimum position. Besides, the cover
13 is the annular groove 6 on the opening side of the concave grooves 7 and 8 for locking the lead 9.
Since it is engaged with, the lead 9 can be securely fixed without being affected by the installation position of the lead 9.

[Effect of the Invention] As described above, according to the present invention, it is possible to achieve balance without impairing the appearance of the wheel. Moreover, since the balance weight is protected by the cover and built in the wheel, the balance weight does not come off due to external factors.

Moreover, due to the regulation at the contact portion, the balance weight does not come off even when subjected to centrifugal force when the wheel rotates, and the reliability is high.

Also, locking grooves with different cross-sectional shapes on the outer and inner circumference
Correspondingly, the structure in which the balance weight is mounted by using the claw tool having different cross-sectional shapes on the outer peripheral side and the inner peripheral side can prevent erroneous mounting such that the balance weight is mounted on the inner and outer peripheral sides in reverse.

In addition, since the contact portion that comes into contact with the balance weight is formed along the circumferential direction of the annular groove, the contact is reliable even for balance weights of different sizes, and even for balance weights of different sizes, centrifugal force is applied. It is possible to prevent the balance weight from coming off due to the force.

In addition, the annular groove for accommodating the balance weight is concentrically provided on the outer surface of the wheel rim, so that the balance weight can be securely attached at the optimum position.

Moreover, the cover engages with the annular groove on the opening side with respect to the locking groove for locking the balance weight, so that the cover can be securely fixed without being affected by the installation position of the balance weight.

[Brief description of drawings]

1 and 2 show an embodiment of the present invention.
The figure is a sectional view showing the balance weight mounting structure, which is the main part,
FIG. 2 is a front view thereof, and FIG. 3 is a sectional view showing a conventional balance weight mounting structure. 1 ... Wheel rim, 6 ... Accounting groove, 7,8 ... Recessed groove (locking groove), 9 ... Lead (balance weight), 11 ... Locking part, 10 ... Claw tool, 12 ... Stopper part (contact part), 13
……cover.

Claims (1)

[Scope of utility model registration request] 1. A wheel rim, an annular groove provided on an outer surface of the wheel rim and concentric with the shaft center, a balance weight accommodable in the annular groove, and a circumferential direction on a peripheral surface of the annular groove. A locking groove formed along the ring groove and having different cross-sectional shapes on the outer peripheral side and the inner peripheral side of the annular groove, and elastically locking with the locking groove provided on the balance weight to form the balance weight in the annular groove. The claw tool having different cross-sectional shapes on the outer peripheral side and the inner peripheral side corresponding to the locking groove to be installed on the outer peripheral side of the annular groove along the circumferential direction and installed in the annular groove. A contact portion that comes into contact with the balance weight to restrict the movement toward the wheel outer peripheral side, and an annular cover that engages with the annular groove on the opening side of the locking groove of the annular groove and closes the opening of the annular groove. Balance weight mounting structure characterized by