JPS60146703A - Spike tire - Google Patents

Abstract

PURPOSE:To bring its excellent brakability and drivability both into full play in time of driving on an icy and snowy road as well as to pretect a road surface from any damage to an ordinary road, by making up a tire into such a ringlike member as being tilted so as to cause its inner circumferential surface to take the same gradient as the taper part of a spike pin. CONSTITUTION:A spike pin 1 consists of a pin setting metal device 2 and a pin 3 composed of a sintered hard alloy embedded in a tip of the metal device 2. A taper part 2a inclined toward the inside of a tire 4 is formed in an inner side end of the metal device 2. A ring 5 serving as a form memory alloy member, whose inner circumferential surface is tilted so as to make the taper part 2a take the same gradient, is embedded in an inner part of the tire 4. The spike pin 1 is coupled with a stop metal device 7 by dint of a coil spring 6 whereby it is prevented from slipping off the tire 4. In addition, the pin 1 is projected out of a surface of the tire 4 so that it may bring its excellent brakability and drivability both into full play even in case of driving on a frozen road surface.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention This invention relates to an improvement in the 4% construction of spiked tires used when driving motor vehicles on icy and snowy roads.

Description of Prior Art Conventionally, when driving a car in a cold region, in order to prevent accidents caused by snow accumulation or frozen road surfaces,
That is, spiked tires are widely used to improve braking and driving performance. Spiked tires have a lower cost than snow tires or other spikeless tires.
There are some brakes that have excellent braking performance even on frozen roads or roads with melted surfaces.Therefore, in cold regions, it is important to ensure safety when driving in winter.
It has become an essential piece of equipment.

However, in recent years, while wearing spiked tires,
When driving in urban areas without ice or snow, the road surface is scraped and dust is generated quite often, making it an extremely important pollution problem.

In addition, when using snow tires, when driving on a road surface without ice or snow, it does not simply scrape the road surface.
There is also the problem that signs on the road surface are also scratched off, leading to accidents. Furthermore, in the winter, dust gets mixed in with the snow, and the problem may not become apparent, but in early spring, dust starts flying up during the popular season.
It has been pointed out that not only does it pollute vehicles, but it also has an adverse effect on the human body.

In view of the various problems mentioned above, there have been discussions in recent years to the effect that the use of spiked tires should be abolished. However, as noted in F, braking performance and driving performance on snow-covered roads can often be satisfied only with spiked tires. Therefore, abolishing spiked tires is not desirable from the viewpoint of ensuring traffic safety.

Therefore, there is a desire for a new spiked tire that satisfies the braking and driving performance of spiked tires while also eliminating the above-mentioned generation of dust and the like.

OBJECTS OF THE INVENTION The object of the present invention is to provide a novel vehicle that satisfies braking performance and driving performance on snow-covered roads, and that does not generate dust even when driving on roads other than icy and snow-covered roads. Our goal is to provide spiked tires with a unique structure.

Structure of the Invention In summary, the present invention includes a spike bin having a tapered portion formed at the inner end of the tire, the spike bin being connected to the inner end of the tire, and the spike bin being connected to a tie V at a temperature lower than the transformation temperature. a shape memory alloy member that protrudes from the surface and is buried inside the tire at a temperature higher than the transformation temperature; This is a spiked tire, which is a ring-shaped member.

Hereinafter, embodiments of the present invention will be described with reference to the drawings, thereby clarifying the features of the present invention.

DESCRIPTION OF EMBODIMENTS FIGS. 1 and 2 are partially cutaway sectional views showing the structure of a spike bin in an embodiment of the present invention. 1st
As is clear from the figure, the spike bottle 1 of this embodiment consists of a bottle fitting 2 and a bottle 3 made of superalloy embedded in the tip of the bottle fitting 2. Bin mounting bracket 2
A tapered portion 2a that is inclined toward the inside of the tire is formed at the inner end of the tire. A ring 5 as a shape memory alloy member whose inner circumferential surface is inclined to have almost the same inclination as the tapered portion 2a is embedded inside the tire 4 so that its inner circumferential surface contacts the tapered portion 2a. There is C. As mentioned above, the ring 5 is made of a shape memory alloy, and its transformation temperature is selected to be around 0°C, and the temperature C, which is lower than the transformation temperature, is at the tip of the spike bottle 1, as shown in FIG. A pin 3 protrudes from the surface of the tire 4. ring 5
is heat-treated so that the inner diameter expands at a temperature C higher than the transformation temperature, and becomes contracted at a temperature lower than the transformation temperature, as shown in FIG. A coil spring 6 is attached to the inner end of the bottle attachment fitting 2, and the other end of the coil spring 6 is fixed to a stopper fitting 7. Therefore, the spike bin 1 is connected to the stopper 7 by the coil flange 6, and is prevented from falling off from the tire 4.

As mentioned above, the ring 5 has a transformation temperature of around 0°C, so when driving on an icy road, it is placed in an environment with a temperature lower than the transformation temperature, so as shown in FIG. The spike bin 1 protrudes from the surface of the i-4, and therefore, like the conventional spike tie puller 7, it exhibits excellent braking and drivability even on frozen road surfaces.

On the other hand, when driving on a frozen road surface or a road surface other than a frozen road surface with melted water, the ring 5 made of a shape memory alloy is driven in a temperature environment lower than 0°C.
The inner diameter of the spike bottle 1 expands, and the tip of the spike bottle 1 is buried inside the surface of the tie A24 due to the action of the tension spring 6. Therefore, problems such as generation of dust caused by the spike bin 1 scraping the road surface can be reliably solved.

Note that the coil spring 6 is not an essential component, and the stopper 7 and the spike bin 1 may be connected by a string-like member that does not have elasticity. This is because as long as the inner diameter of the ring 5 made of a shape memory alloy expands, the spike bottle 1 will be buried inside the tire 4 due to pressure from the road surface.

In addition, in the embodiment shown in FIGS. 1 and 2, the stopper 7 and the spike bottle 1 are connected by the coil spring 6, but as shown in a partially cutaway sectional view in FIG. A small diameter portion 8 is provided at the inner end of the metal fitting 2, and using a stopper 7 that fits the through hole 7a of the small diameter portion 8, the first metal fitting 7 and the small diameter portion 8 are connected by plate blades 9a and 9b. May be connected. The leaf springs 9a and 91+ push the small diameter portion 2b toward the inner side of the tie 1a (=J force), and the illustrated state shows a state at a temperature lower than the transformation temperature near 0°C, and here the leaf springs 9a, By narrowing the inner diameter of the shape memory alloy ring 5 against the urging force of the spike bottle 9b, the bottle 3 at the tip of the spike bottle 1 protrudes from the surface of the tire 4. Since the inner diameter of the memory alloy ring 5 expands, the spike bottle 1 is pulled inward of the tire 4 by the urging force of the springs ga and gb, so that the tip of the spike bottle 1 is buried in the surface of the tire 4. become. Therefore, it can be seen that the same effects as the embodiments shown in FIGS. 1 and 2 can be achieved.

In addition, in each of the embodiments described above, the spike bin 1 is
In order to make it possible for the shape memory alloy member to protrude from the surface of the tire 4 at a temperature lower than the transformation temperature and to be buried inside the surface of the tire 4 at a temperature higher than the transformation temperature, the shape memory alloy member must exhibit a reversible shape change. It is preferable that the material is made of the same material. Such reversible shape change can be achieved, for example, by changing Ni to 55.3 to 57,
0% by weight, balance T1, or a portion of the Ni or Ti is Fe, Go, Cu, Ai.

It is possible to put it into practical use by using a Ni Ti alloy substituted with one or more elements selected from the group consisting of (1). This is because it can accurately follow temperature changes, thereby reliably preventing damage to the road surface or abrasion of road markings on the road surface.

Next, a specific experimental example of the embodiment shown in FIGS. 1 and 2 will be explained. A Ni-Ji gold alloy containing 56.0% by weight of Ni and the remainder being Ti was used to prepare a shape-memory composite 5 as shown in FIGS. 1 and 2,
The ring 5 has a spike bin 1, a tension spring 6 and a stop:
The metal fitting 7 was attached and buried in the tire. The inner circumference of the ring 5 is formed with a tapered portion having an inclination of about 45° so that the diameter gradually decreases by /JX toward the inside of the tie 1a, and the pin fitting 2 A taper part having almost the same inclination angle as this taper part is formed at the inner end of the ring 5. The ring 5 was heated in advance at 800°C for 1 hour, then rapidly cooled in ice water, a mandrel was inserted in liquid nitrogen, the diameter of the inner periphery was enlarged, and the ring 5 was heated at 450° C while intersecting in this state. It was heated to ℃.

In the spike tie 17 prepared as described above, for example, at a low temperature of -10'C, the ring 5 contracts and the spike bottle 1 protrudes outside the tire, while at a high temperature of +10'C, the ring 5 contracts. The inner diameter expands and due to road pressure,
This did not prevent the squirrel bike bin 1 from being buried in the tire. Therefore, it was confirmed that the bottle effectively functions as a spike when the outside temperature is lower than around 0°C, and does not damage the road surface like a normal spike tie at a high temperature.

Effects of the Invention As described above, according to the present invention, there is provided a spike bin in which a tapered portion is formed at the inner end of the tire, the spike bin is connected to the inner end of the tire, and the spike bin is heated at a temperature lower than the transformation temperature. The shape memory alloy member is provided with a shape memory alloy member that protrudes from the surface of the temperature tie V and is buried inside the tie 7 at a temperature higher than the transformation temperature, and the inner peripheral surface of the shape memory alloy member is approximately the same as the tapered portion of the spike bottle. Because it is a ring-shaped member that is tilted at the same slope, when driving on icy and snowy roads, it exhibits extremely excellent braking and driving performance similar to conventional spiked tires, and it also provides excellent braking and driving performance when driving on icy and snowy roads. Since the road surface is not damaged when driving, it is possible to reliably prevent environmental pollution due to the generation of dust, etc., and it is also possible to prevent road markings from being worn out, thus greatly contributing to ensuring traffic safety. becomes possible.

[Brief explanation of the drawing]

Figures 1 and 2 are partially cutaway sectional views showing a first embodiment of the present invention, with Figure 1 showing the spike pin in a protruding state and Figure 2 showing the spike pin in a sunken state. show. FIG. 3 is a partially enlarged cross-sectional view showing another example of the connection structure between the spike pin and the fastener, which is similar to the embodiment shown in FIGS. 1 and 2. DESCRIPTION OF SYMBOLS 1... Spike pin, 2... Bottle mounting bracket constituting the spike pin, 2a... Tapered portion at the inner end of the spike bin, 3... Bin constituting the spike pin, 4...
Tire, 5...Ring as a shape memory alloy member. Patent applicant: Sumitomo Electric Industries, Ltd. Procedural amendment (method) 1. Indication of the case Patent Application No. 3156 of 1982 2. Name of the invention Spiked tires 3. Person making the amendment Relationship to the case Patent applicant address: Osaka City Higashi-ku Kitahama 5-15 name (2
13) Sumitomo Electric Industries, Ltd. Representative: Tetsube Kawakami 4, Agent address: 112-319 Tenjin, Kita-ku, Osaka @ Yachiyo Daiichi Building Telephone: Osaka (06) 351-6239 (Main) w
On the 1st day 6, submit the specification to be amended 7, the details of the amendment clearly written in type, as attached. Please note that there are no changes to the content. that's all

Claims (1)

[Scope of Claims] (1) A spike pin having a tapered portion formed at the inner end of the tire, and a spike pin connected to the tapered portion of the inner end of the tire, and the spike pin is tied at a temperature lower than the transformation temperature. A shape memory alloy member that protrudes from the C surface and is buried inside the tire when the humidity is higher than the transformation temperature;
The shape memory alloy member is a ring-shaped member whose inner circumferential surface is inclined at almost the same angle as the tapered portion of the spike pin. The spiked tire according to claim 1, which is constructed from a shape memory alloy material that undergoes reversible shape changes. (3) The shape memory alloy member contains Ni at 55°3-5
NiTi alloy consisting of 7.0% by weight and the balance being Ti, or a part of the above N1 or ゛[i is Fe. Co, Ct+, A 11. ' Ni Ti substituted with one or more elements selected from the group
Spike tie ψ according to claim 2.