JP4407181B2 - Pneumatic sensor support member - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a support member for an air pressure sensor, and more particularly to a support member for an air pressure sensor that can accurately measure the temperature and internal pressure inside the tire without being influenced by factors from the outside of the tire.
[0002]
[Prior art]
In recent years, various types of pneumatic tires have been provided with pneumatic sensors for measuring the internal temperature of the tire and the internal pressure that fluctuates in accordance with the internal temperature in consideration of safe driving and riding comfort of the vehicle. Proposed. The tire internal pressure is defined according to the tire diameter, depending on the vehicle weight and running speed, etc., but the tire internal temperature always fluctuates and the tire internal pressure fluctuates accordingly. Difficult to grasp.
[0003]
Also, in recent years, run-flat tires that can travel a certain distance even if the tires are punctured are used, but it is extremely dangerous when traveling at high speed in a punctured state, and is the tire punctured? There is a problem that it is difficult to confirm when judging whether or not.
[0004]
For this reason, tires equipped with air pressure sensors are put on the market inside pneumatic tires, and in the future, a bill or the like that obliges tires equipped with air pressure sensors in Japan is also considered.
[0005]
By the way, as a conventional air pressure sensor mounting structure, a structure that uses a rim band or the like to be attached to a part of a tire rim, or a structure that is integrally attached to an air injection valve attached to the tire rim via a nut has been proposed. (For example, see Patent Document 1 and Patent Document 2).
[0006]
A tire in which a foam material or the like is embedded in the tire is also known, although the purpose is different from the mounting structure of the air pressure sensor (see, for example, Patent Document 3).
[0007]
[Patent Document 1]
JP 59-67307 (pages 2 and 3, FIG. 1)
[0008]
[Patent Document 2]
Japanese Patent Laid-Open No. 10-307069 (pages 2 to 4, FIG. 2)
[0009]
[Patent Document 3]
[0010]
[Problems to be solved by the invention]
However, the conventional air pressure sensor mounting structure is a structure in which the air pressure sensor is directly attached to the tire rim, so that heat from the external mechanism is transferred to the tire rim during driving, especially when the brake is operated frequently. Heat from the rotor is transmitted to the tire rim and temporarily rises when the vehicle is stopped.
[0011]
For this reason, since this is detected by the air pressure sensor, the temperature inside the tire cannot be measured accurately, and the tire internal pressure that fluctuates according to the internal temperature cannot be measured accurately. There was a problem to say.
[0012]
Further, in the case of the conventional air pressure sensor mounting structure, there is a problem that a tire rim is processed or a mounting operation is required with a separate part, which requires a lot of labor and cost.
[0013]
The present invention has been devised by paying attention to such conventional problems, and can accurately measure the temperature inside the tire, and as a result, can accurately grasp the tire pressure, and is easy and inexpensive to install. It is an object of the present invention to provide a support member for a pneumatic sensor that can be structured.
[0014]
[Means for Solving the Problems]
In order to achieve the above object, a support member for a pneumatic sensor according to the present invention is a support member for mounting an air pressure sensor for measuring an internal pressure corresponding to a tire internal temperature, between a pneumatic tire and a rim. A tubular heat insulating bag body that is inserted into and attached to the whole or a part of the space portion formed in the air and that is filled with air formed by winding the space portion in a cross-section in the tire width direction. The gist is that the air pressure sensor is attached to at least one place in the tire circumferential direction in a substantially central region of the cross section in the tire width direction of the space portion by enclosing the air pressure sensor in the center. To do.
[0017]
As described above, the structure in which the air pressure sensor is attached via the support member in the space formed between the pneumatic tire and the rim and at least one place in the circumferential direction of the tire is provided. The temperature can be accurately measured, and as a result, the tire internal pressure can be accurately grasped, and the air pressure sensor can be easily attached, and the workability can be improved and the structure can be reduced.
[0018]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the accompanying drawings.
[0019]
FIG. 1 is a partial cross-sectional view of a pneumatic tire showing a first reference form of a support member of a pneumatic sensor of the present invention, 1 is a pneumatic tire (a flat tire is shown in this first reference form ), Reference numeral 2 denotes an air pressure sensor. The air pressure sensor 2 is a substantially central region of the space portion 4 formed between the pneumatic tire 1 and the rim 3 and is provided at at least one place in the tire circumferential direction (provided at a plurality of places). It is also possible to attach it via a support member 5.
[0020]
In the first reference embodiment , the support member 5 is formed between the pneumatic tire 1 and the rim 3 in a state where the foam material 6 is used as a low specific gravity material and the air pressure sensor 2 is thereby wrapped. It is inserted and attached to the whole or a part of the space portion 4 to be attached.
[0021]
Specifically, a hole or notch that reaches the center of the foam 6 is provided in a part of the foam 6 that is formed in a shape that can be fitted in the space 4 in advance, and a pneumatic sensor is provided in the hole or notch. 2 is embedded, and the foam material 6 in such a state is inserted and attached to the space 4 in the pneumatic tire 1, and then the rim 3 is attached to the pneumatic tire 1.
[0022]
Here, as the low specific gravity material, one having an apparent specific gravity of 0.1 or less, more preferably 0.05 or less, is preferable because the influence on the tire balance and weight is small. Moreover, as such a material, a porous material having a large number of air chambers, more preferably a foamed resin or rubber (foam material) is preferable.
[0023]
Examples of such resins and rubbers include polyurethane, polyethylene, polypropylene, ERDM, CR, NBR, silicone rubber, and phenol resin. When these materials are used to enclose the air pressure sensor 2, it is preferable from the viewpoint that it is difficult to be affected by heat conducted from the tire rim, and that the support member enclosing the air pressure sensor 2 is easily attached to the tire rim.
[0024]
Further, as a second reference form of the support member 5, as shown in FIG. 2, a core 7 (resin resin or non-heat transferable material) attached to the outer peripheral surface of the rim 3 is used. The air pressure sensor 2 is attached to the upper surface via a screw, an adhesive, a band or the like.
[0025]
In addition, since the other structure and effect | action are the same as that of the said 1st reference form , the same code | symbol is attached | subjected and description is abbreviate | omitted.
[0026]
As an embodiment of the support member 5 of the present invention, as shown in FIG. 3, a tube-shaped heat insulation bag body 8 (balloon-shaped) containing air is used, and the tube-shaped heat insulation bag body 8 uses the air pressure sensor. 2 is inserted and attached to the space 4 in the pneumatic tire 1 in a state of being wrapped in the center. Thereafter, the rim 3 is attached to the pneumatic tire 1.
[0027]
In addition, since the other structure and effect | action are the same as the said 1st reference form , the same code | symbol is attached | subjected and description is abbreviate | omitted.
[0030]
Thus, by attaching the air pressure sensor 2 to the predetermined region in the space 4 formed between the pneumatic tire 1 and the rim 3 through the support member 5, the temperature inside the tire can be accurately measured. As a result, the tire internal pressure can be accurately grasped.
[0031]
Further, since the air pressure sensor 2 is always attached via the support member 5, the air pressure sensor 2 can be easily attached, and the workability can be improved and the structure can be reduced.
[0032]
Figure 4 is a sensor support member of the reference embodiment at the time the vehicle stops the vehicle traveling, a graph diagram showing a temperature detection state of the sensor of the conventional sensor mounting structure, in this reference embodiment, the first reference As in the embodiment, the air pressure sensor 2 is installed at the approximate center in the space 4 formed between the pneumatic tire 1 and the rim 3 with the foaming material 6 having a heat insulating property as the support member 5. Shows the case where the air pressure sensor is directly attached.
[0033]
As is clear from this graph explanatory diagram, during running, the tire internal temperature is detected as substantially the same temperature, but when the vehicle is stopped, in this reference form , heat from the outside is not detected. However, in the case of the conventional example, heat from the brake rotor or the like is transmitted to the tire rim, and this is detected by a conventional air pressure sensor, so that the detected temperature temporarily rises.
[0034]
As a result, it can be seen that the conventional air pressure sensor cannot accurately measure the temperature inside the tire, and cannot accurately measure the tire internal pressure that varies in accordance with the internal temperature.
[0035]
【The invention's effect】
The present invention provides a support member for mounting an air pressure sensor for measuring an internal pressure corresponding to a tire internal temperature inside a pneumatic tire, as described above, in a substantially central portion of a space formed between the pneumatic tire and a rim. Since the air pressure sensor is attached to the position and at least one place in the tire circumferential direction via the support member, the temperature inside the tire can be accurately measured, and as a result, the tire internal pressure can also be accurately grasped, There is an effect that a simple and inexpensive structure can be obtained.
[Brief description of the drawings]
FIG. 1 is a partial cross-sectional view of a pneumatic tire showing a first reference embodiment of a support member of a pneumatic sensor of the present invention.
FIG. 2 is a partial cross-sectional view of a pneumatic tire showing a second reference embodiment of the support member of the pneumatic sensor of the present invention.
FIG. 3 is a partial cross-sectional view of a pneumatic tire showing an embodiment of a support member of the air pressure sensor of the present invention.
FIG. 4 is a graph explanatory diagram showing sensor temperature detection states of a sensor support member of a reference form and a conventional sensor mounting structure when the vehicle is running and when the vehicle is stopped.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Pneumatic tire 2 Air pressure sensor 3 Rim 4 Space part 5 Support member 6 Foam material 7 Core 8 Thermal insulation bag body

Claims (1)

  A support member for mounting an air pressure sensor for measuring an internal pressure corresponding to a tire internal temperature is inserted into and attached to the whole or a part of a space formed between the pneumatic tire and a rim. It is made of a tube-shaped heat insulating bag body containing air formed by spirally winding the space portion in a cross section in the tire width direction, and this air pressure sensor is wrapped in the center. A support member for an air pressure sensor, wherein the air pressure sensor is attached to at least one place in the tire circumferential direction in a substantially central region of a cross section in the tire width direction of the space portion.

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