JPH07117418A - Tire for use on snow or ice - Google Patents

Abstract

PURPOSE:To provide a tire which has spikes projecting therefrom for preventing the tire from slipping when running on snowy or icy road surfaces and is otherwise made studless by remote control. CONSTITUTION:A hydraulic pump and an air pump both of which are driven by switch operations on battery power are mounted in a vehicle and lines 12, 13 connected respectively to the hydraulic pump and the air pump are introduced into each tire 6 via a rotary joint 15, and the air line 13 is opened to the inside of each tire 6 so that even if air leaks from a tire as the result of a puncture, air pressure can be supplied. A hydraulic cylinder 11 communicating with the hydraulic line 12 is connected to the inner peripheral surface of each tire 6 and spikes 10 are engaged with the hydraulic cylinder 11 and allowed to freely move into and out of the outer peripheral surface of each tire 6.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a snow or freezing tire, and in particular, when a road is in a snowy or frozen state, the vehicle runs with a spike protruding from the tire circumferential surface, and when it is not in a snowy or frozen state. The present invention relates to a tire structure in which spikes can be housed in a tire to run as a studless general tire.

[0002]

2. Description of the Related Art When a vehicle travels on a snowy or frozen road surface, a spiked tire, which is more convenient than a tire chain, is generally used. However, the "Act on Prevention of Spike Tire Dust Generation" was enacted in June, 1990 due to the effects on the health and living environment such as respiratory diseases caused by dust generated by cutting the road surface with spike tires. As for the use of spiked tires, as of April 1992, 672 municipalities in 17 prefectures, mainly in northern Japan, have been designated as prohibited areas, and the use of spiked tires on roads that are not covered with snow or frozen in the area. Is prohibited.

[0003]

On the other hand, on the other hand,
Compared to spiked tires, the performance of studless tires is being improved, but the braking performance, climbing performance, etc. are inferior at present, and further measures are taken to secure traffic safety in snowy and cold regions. Is desired.

In view of such circumstances, the present invention has been made in light of the purpose of the law, and spikes for preventing the tire from slipping out of the tire only when traveling on snowy or frozen roads, and on roads that are not so. When traveling
It is intended to provide a tire that is in a studless state by remote control.

[0005]

In order to achieve the above object, the present invention provides a structure according to claim 1, wherein spikes are provided so as to be retractable from the outer peripheral surface of a vehicle tire.

According to a second aspect of the present invention, a hydraulic cylinder is disposed on the inner peripheral surface of the vehicle tire, and spikes are engaged with the hydraulic cylinder so as to be retractable from the outer peripheral surface of the tire and connected to the hydraulic cylinder. (EN) Provided is a structure in which a hydraulic power supply is connected to a hydraulic pump via a rotary joint, and a battery power source and a switch for operating the hydraulic pump in a timely manner are mounted on a vehicle.

According to the present invention, a hydraulic pump and an air pump, which are driven by a switch from a battery power source, are mounted on a vehicle, and pipes respectively connected to the hydraulic pump and the air pump are introduced into the tire through a rotary joint. ,
While opening the air piping in the tire, fix the hydraulic cylinder communicating with the hydraulic piping to the inner peripheral surface of the tire,
Provided is a structure in which a spike is engaged with the hydraulic cylinder so as to be retractable from an outer peripheral surface of a tire.

According to a fourth aspect of the present invention, the hydraulic pump and the air pump can be independently driven by separately arranging the electric wirings of the hydraulic pump and the air pump and interposing switches. , The spike consists of a tubular body with a collar at one end,
Provided is a configuration in which a threaded portion is formed on the outer peripheral surface of a tubular body.

[0009]

According to claim 1 of the present invention having the above structure,
When the road is in a snowy or frozen state, the spikes are projected from the circumferential surface of the tire when traveling, and when the road is not in a snowy or frozen state, the spikes are housed in the tire to run as a studless general tire.

According to the second aspect of the present invention, when a snowfall or a freezing condition is encountered on the road surface while the vehicle is traveling, when the switch is operated, the hydraulic pump is driven and the hydraulic cylinder is operated via the pipe so that the outer peripheral surface of the tire is exposed. The spikes stick out and prevent them from slipping.

According to a third aspect of the present invention, when a switch is operated when a snowfall or a frozen state of the road surface is encountered while the vehicle is traveling, the hydraulic pump is driven and the hydraulic cylinder is operated via the pipe to operate the tire. The spikes protrude from the outer peripheral surface to prevent slipping, and the air pump is also driven to supply a predetermined air pressure into the tire through the piping, so even if the tire leaks due to puncture, etc. You can refill and drive safely.

According to the present invention, since the air pump and the hydraulic pump can be operated independently, the air pressure is kept constant even when the tire is running even when the spike is not in the protruding operation and the tire air pressure is low. be able to.

[0013]

EXAMPLES Examples of the present invention will be described below. As shown in FIG. 1, an electric hydraulic pump 2 and an electric air pump 3 are mounted on a rear portion of a vehicle 1, and pipes 4 and 5 connected to the hydraulic pump 2 and the air pump 3 are respectively attached to tires 6 of rear wheels. Electrical wiring 8 for guiding and driving the hydraulic pump 2 and the air pump 3 with a battery power source 7 mounted on the front of the vehicle body
And the switch 9 for opening and closing the switch is placed in the cab. The switch 9 is operated during traveling as necessary, the hydraulic pump 2 is driven to cause the spike 10 embedded in the tire 6 to project, and air is supplied into the tire 6.

The tire 6 is, as shown in FIGS. 2 to 4,
It is configured by embedding a large number of metal stud spikes 10 in a zigzag pattern on the circumferential surface, and the spikes 10 are respectively engaged with single-acting hydraulic cylinders 11 so as to project and sink in the radial direction. I am fit. The hydraulic cylinder 11 is appropriately fixed to the inner peripheral surface of the tire 6 while preventing air leakage, and is connected to each other in series by a hydraulic pipe 12a. Hydraulic pipe 1 continuous with hydraulic pipe 12a
2b is connected to the rotary joint 15, and the hydraulic pipe 12 is connected to the rotary joint 15. Hydraulic piping 12
Is connected to the pipe 4. Further, an air pipe 13a that opens into the tire 6 is provided in the rotary joint 15,
The air pipe 13 a is connected to the pipe 5 from the wheel hub 14 via the rotary joint 15.

The rotary joint 15 is, as shown in FIG. 6, an outer cylinder 1 fixed to the wheel hub 14.
6, the inner cylinder 17 is rotatably fitted to each other, and both ends of the inner cylinder 17 are fixed to the outer cylinder 16 with snap rings 18 to prevent the inner cylinder 17 from coming off. 12 and the air pipe 13 are connected, and the air pipe 13 is opened in the tire 6.

As shown in FIGS. 4 and 5, the spike 10 has a threaded portion 1 on the peripheral surface of a metal stud which penetrates the wall thickness of the tire 6.
8 is formed, the metal tack is a tubular body, and has a brim portion 19 at the base end portion. The spike 10 is not limited to the metal stud, and may be made of other appropriate material. The hydraulic cylinder 11 is fixed to the inner surface of the tire 6 so as to prevent air leakage.

The operation of the above embodiment will be described below.
Switch 9 when driving on a road without snow or freezing
Without operating the hydraulic cylinder 1
1 does not operate, and the vehicle runs without causing the spike 10 to project from the tire 6. Therefore, the tire 6 operates similarly to a normal spikeless tire.

Next, when a snowfall or a frozen road is encountered while traveling, the switch 9 arranged in the driver's cab is operated to drive the hydraulic pump 2 to supply the hydraulic pressure from the pipe 4 to the hydraulic pipe 12. 11 is activated and spike 1
0 is projected outward from the surface of the tire 6 in the radial direction. Therefore, when the threaded portion 18 of the spike 10 comes into contact with the road surface, the tire 6 has the same function as the spiked tire.
To prevent slipping. Since the spike 10 is a tubular body, even if it is worn away, an acute angle portion is always formed at the tip portion, and the slip preventing effect is great.

On the other hand, since the air pump 2 is driven in conjunction with the operation of the switch 9, air is supplied from the air pump 2 into the tire 6 through the pipe 5 and the rotary joint 15, so that the tire is always driven. The air pressure of can be kept constant.

It should be noted that the hydraulic pump 2 and the air pump 3 may be provided with separate switches 9 and 9 so that the electric wiring 8 is separate so that they operate independently. Further, if a gauge for measuring the air pressure in the tire 6 is attached to the driver's cab so that it can be monitored, air can be supplied so that the tire pressure is always constant as needed.

[0021]

According to the present invention described above, even if a snowfall or a frozen road is encountered while traveling, the spikes can be protruded from the tires by operating the switches in the driver's cab to form spiked tires. It can prevent slipping and can drive safely.

In addition, with respect to a decrease in tire pressure which may be caused by embedding the spike in the tire, a predetermined air pressure can be independently supplied to the tire in conjunction with the protrusion operation of the spike. There is no danger of running due to a decrease in

In addition, when snow or freezing does not occur, spiked tires are not formed unless the spikes are projected so that there is no risk of cutting the road surface to cause dust pollution.

[Brief description of drawings]

FIG. 1 is a side view of a vehicle showing an embodiment of the present invention.

FIG. 2 is a sectional side view of a tire.

FIG. 3 is a front view of a tire.

FIG. 4 is a partially enlarged view of FIG.

FIG. 5 is a perspective view of a spike.

FIG. 6 is a sectional side view of a rotary joint.

[Explanation of Codes] 1 ... Vehicle 2 ... Hydraulic Pump 3 ... Air Pump 4, 5 ... Piping 6 ... Tire 7 ... Battery Power 8 ... Electrical Wiring 9 ... Switch 10 ... Spike 11 ... Hydraulic Cylinder 12 ... Hydraulic Piping 13 ... Air Piping 15 ... Rotary joint 18 ... Screw part 19 ... Collar part

Claims (5)

[Claims] 1. A tire for snowfall or freezing, wherein spikes are provided so as to be retractable from the outer peripheral surface of a vehicle tire. 2. A vehicle-use tire is provided with a hydraulic cylinder on an inner peripheral surface thereof, and a spike is engaged with the hydraulic cylinder so as to be retractable from the outer peripheral surface of the tire, and a hydraulic pipe connected to the hydraulic cylinder is provided. A snow or freezing tire, characterized in that the vehicle is equipped with a battery power supply and a switch that are connected to a pipe connected to a hydraulic pump via a rotary joint, and that operate the hydraulic pump in a timely manner. 3. A hydraulic pump and an air pump driven by a switch from a battery power source are mounted on a vehicle, and pipes respectively connected to the hydraulic pump and the air pump are introduced into a tire through a rotary joint to remove air from the air. While the pipe is opened in the tire, a hydraulic cylinder communicating with the hydraulic pipe is fixed to the inner peripheral surface of the tire, and spikes are engaged with the hydraulic cylinder so that the hydraulic cylinder can be retracted from the outer peripheral surface of the tire. Characterizing snow or freezing tires. 4. The snow or freezing according to claim 3, wherein the hydraulic pump and the air pump can be driven independently by interposing switches with separate electric wirings for the hydraulic pump and the air pump. tire. 5. The snow or freezing tire according to claim 2, wherein the spike is formed of a tubular body having a flange portion at one end, and a threaded portion is formed on the outer peripheral surface of the tubular body.