JPH01123702U - - Google Patents

Description

[Brief explanation of the drawing]

Fig. 1 shows the main parts of a spike device according to a preferred embodiment of this invention, Fig. a is a sectional view when the spike is used, Fig. b is a sectional view when the spike is not used, and Fig. 2 is a cutaway of the same part. The side view and FIG. 3 are cross-sectional views showing different embodiments in which the spike devices are arranged in different positions. 1...Spike device, 2...Casing, 2A
...Opening, A...Dovetail groove, 3...Pressure tube, 4
...Air inlet/outlet, 5...Solenoid switching valve, 6...Conduit, 7...Supply conduit, 8...Tread body, 8A
...Annular base, 8B...Annular protrusion, 8C...Bottom surface, 8D...Tread surface, 9...Spike.

Claims (1)

[Scope of Claim for Utility Model Registration] A spike device for an automobile that is annularly attached to the wheel hub in parallel with the wheel and is expandable and contractible in the radial direction by providing spikes on the tread surface, the spike device having an opening on the ground contact side. a casing having an annular shape with a dovetail cross section; a pressure tube built into the casing and expandable and contractible in the radial direction by supplying and discharging air; and an inner annular base that is slidable in the radial direction within the casing. an annular tread body fitted on the pressure tube; an inner circumferential surface of an annular base of the tread body set in substantially the same plane as the inner bottom surface of the casing; The tread body includes a stepped portion provided at the base and engaged with the dovetail groove of the casing, and an annular protruding portion of the tread body that protrudes from the annular base portion of the tread body and has a spike on the tread surface at the tip. Features a car spike device.