Зображення сторінки
PDF
ePub

The one piece clincher rim with its principal dimensions for various tire sizes is shown at Fig. 418. This rim is made in onepiece and not cut in any direction. It is adapted only for use with tires having soft extensible beads which can be pried or lifted over the edges of the rim. There is only one type of clincher rim on the market but at the present time its use is confined to small and medium weight cars as too much effort is needed to install large size tires on rims of this form. There are many types of quick detachable clincher rims which have been designed to make possible quick application of clincher tires which are well thought of on account of the holding power of the tire beads. These rims are invariably composed of two or three parts, consisting first of a rim base with an integral inside clinch, or separate inside endless clincher ring and a separate outside clincher ring which is made so that it may open with some fastening device for holding the ends in place or it may be made endless with an open lock ring to hold it in position.

Examples of the most popular form of quick detachable clincher rim are shown at Fig. 419. The form shown at 1-B is a type which has a base, two endless clincher side rings and an open end lock ring which may be snapped out of its seat, and permit the removal of the outside clincher ring and then the tire if it contains no air pressure. The rim shown at 2-B has the inside clinch integral with the rim base, the outside clincher ring and the lock ring being similar in action to those of 1-B though different in design. The rims shown at 3-B and 4-B are similar to rim 2-B except that the outside clincher ring is open ended having a mechanical lock for the ends of the ring. Rim 5-B has an open end outside clincher ring with an angle of the retaining groove in the rim base of such form that the inflation of the tire causes it to seat home more firmly so that no locking device is necessary.

Forms of quick detachable straight side rims are shown in this same illustration, these being very similar in construction to those previously described except that the retaining rings are made to fit straight side tires instead of clincher tires. The straight side tire, which was originated by Dunlop, has a bead devoid of any clinching arrangement though the bead is not extensible as it has a num

ber of piano wire rings firmly vulcanized in the base portion to prevent such extension. The retaining means in the rim shown at 1-A to 4-A inclusive are practically the same as those outlined from 1-B to 5-B inclusive.

A number of combination rims has been

[blocks in formation]

Fig. 419.-Sectional Views, Showing Construction of Quick Detachable Rims that Have Received Practical Application.

devised which can be adapted to take either straight side or quick detachable clincher by merely reversing the retaining rings which have a section adapted for retaining either the clincher bead or the straight side form. These are shown at Figs. 1-C to 3-C, inclusive.

Examples of quick detachable demountable rims are shown at Fig. 421, A. As will be observed these are rims of the simpler

form having tapering flanges on the base by which they are held to the wheel felloe by suitable wedge rings or clamp nuts. Demountable rims are shown at B. These are adapted to receive the standard clincher rings as shown in the upper portion of the illustration or the one piece straight side Dunlop rim as shown in the lower part of the illustration. As will be apparent the rims are held in place by a series of wedges which are forced in the space between the tire carrying rim and that attached to the wheel

[graphic][subsumed][subsumed][subsumed][subsumed]

Fig. 420.-Sectional View, Showing Arrangement of Cords that Replace the Fabric Carcass in the Palmer System Cord Tire Construction.

felloe. A form of tire retaining rim that was formerly very popular is shown at Fig. 422, A. This is known as the Fisk Bolted-On type and could only be used in connection with a tire having a base of the form shown in the illustration. The tire was securely held to the steel rim by means of retaining rings which were clamped firmly in place by bolts carrying specially formed washers designed to clamp over the edge of the retaining ring as well as that of the rim. When it was desired to remove the rings the special tools shown at Fig. 422, B, were needed. The special clamping member was used to squeeze the rings closely together and permit screwing up the retention nuts with the special socket wrench provided for the purpose. When the retaining bolts had been un

screwed all the way around the tire the rings could be withdrawn. and the tire easily pulled off of the flat rim. When the tires were installed the clamping member came in handy to squeeze the rings. and the portions of the tire base closely enough together so the nuts could be caught on the end of the bolts.

The Goodrich quick detachable rim and the special tool needed for its manipulation are shown at C. The feature is in the shape of

[graphic][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed]

Fig. 421.-Sectional Views, Showing Construction of Quick Detachable Demountable Rims.

the locking slot in the rim attached to the wheel felloe. The open end locking rim carries tongues which fit into the slot and which may be sprung into place to securely lock the rim. The tool shown. is provided to facilitate bringing the end of the locking rings together in order to spring the tongues into the locking grooves. The pins in the ends of the levers fit suitable pin holes in the locking member. When it is desired to remove the ring one of the tongues. is pried out of its locking groove and then pulled away from the rim at all points. After the ring has been partially detached it is

[merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][subsumed][subsumed][subsumed][subsumed][ocr errors][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed]

Fig. 422.-Views Showing Construction of Various Types of Quick Detachable Rims and Tools for Their

[graphic]

Manipulation.

[graphic]
« НазадПродовжити »