JP2010241272A - Tire mounting structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a tire mounting structure for a spare tire that is preferable for a vehicle having a tire pressure monitoring system. <P>SOLUTION: The tire mounting structure is a mounting structure for use in mounting a tire to a vehicle chassis in which a spare tire 4 provided with a wheel state detecting unit 6 for transmitting a detected wheel state to an external system as a wheel state information in a wireless manner. The structure comprises a first engaging part 18 arranged at the spare tire 4 and a second engaging part 20 arranged in a spare tire mounting area 16 of the vehicle chassis and engaged with the first engaging part 18 when the spare tire 4 is mounted in the spare tire mounting area 16, and the first engaging part 18 and the second engaging part 20 are defined for their positional relation in such a way that a transmitter unit contained in the wheel state detecting unit 6 arranged in the spare tire 4 may occupy a predetermined position in respect to the vehicle chassis. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a tire mounting structure, and more particularly to a tire mounting structure for mounting a spare tire to a vehicle body.

  In recent years, in order to realize safer vehicle driving, tire pressure monitoring system (TPMS: Tire Pressure Monitoring System) has been developed to notify the driver by wirelessly transmitting information such as tire pressure and temperature to the vehicle body. It has been. In such a tire pressure monitoring system, a wheel state detection unit that detects a wheel state such as tire pressure is provided for each wheel. This wheel state detection unit is generally provided on a rotating wheel, and the detected wheel information is wirelessly transmitted to the vehicle body side, but when a spare tire is mounted on the vehicle body, A wheel state detection unit is also provided.

  In such a tire pressure monitoring system, it is necessary to distinguish between information transmitted from a wheel condition detection unit provided on a traveling tire and information transmitted from a wheel condition detection unit provided on a spare tire. On the other hand, a technique for distinguishing between a running tire and a spare tire by a change in reception intensity when a transmitter provided on a wheel receives a trigger signal output from a trigger machine provided on a vehicle body side is known. (For example, refer to Patent Document 1). In this technology, since the running tire rotates while the vehicle is running, the distance between the transmitter of the wheel state detection unit provided on the tire and the trigger machine changes, and therefore the reception intensity of the trigger signal changes. On the other hand, since the spare tire does not rotate while the vehicle is running, the distance between the transmitter and the trigger machine does not change, and therefore the reception intensity does not change.

JP 2007-230416 A

  By the way, in the conventional tire pressure monitoring system, the distance between the transmitter of the wheel state detection unit provided in each traveling tire and the trigger device provided on the vehicle body side is made different so that it is provided in any traveling tire. It was distinguished whether it was the information transmitted from the received wheel state detection unit.

  On the other hand, in general, when a spare tire is attached to a rear trunk or a rear door of the vehicle body, the positional relationship around the central axis of the spare tire with respect to the vehicle body, that is, the attachment angle around the central axis has not been determined. Therefore, the position of the spare tire transmitter with respect to the vehicle body changes depending on the mounting angle around the center axis of the spare tire. Therefore, depending on the position of the transmitter, the reception intensity of the trigger signal received by the transmitter of the spare tire may be the same as the reception intensity of the trigger signal received by the transmitter of the traveling tire. . As a result, there is a possibility that the information transmitted from the wheel state detection unit provided in the traveling tire cannot be accurately distinguished from the information transmitted from the wheel state detection unit provided in the spare tire. In the case of a tire pressure monitoring system having a function of displaying the wheel position, the position of the spare tire transmitter is detected to display the mounting position of the spare tire. Therefore, it has been desired that the position of the spare tire transmitter be set at a predetermined position.

  The present invention has been made in view of such circumstances, and an object of the present invention is to provide a tire mounting structure for a spare tire suitable for a vehicle equipped with a tire pressure monitoring system.

  In order to solve the above problems, a tire mounting structure according to an aspect of the present invention is a spare provided with a wheel state detection unit that detects a wheel state and wirelessly transmits the detected wheel state to the outside as wheel state information A tire mounting structure for attaching a tire to a vehicle body, the first engagement portion provided in the spare tire and a spare tire mounting region of the vehicle body, and when the spare tire is attached to the spare tire mounting region A second engagement portion that engages with the first engagement portion, and the first engagement portion and the second engagement portion are included in the wheel state detection unit provided in the spare tire. The positional relationship between the transmitters is determined so that the transmitters are in a predetermined position with respect to the vehicle body.

  The tire mounting structure for a spare tire according to this aspect can be suitably used for a vehicle equipped with a tire pressure monitoring system.

  ADVANTAGE OF THE INVENTION According to this invention, the tire mounting structure of the spare tire suitable for the vehicle provided with the tire pressure monitoring system can be provided.

It is the schematic which shows the outline | summary of the tire pressure monitoring system in the vehicle provided with the tire attachment structure which concerns on Embodiment 1. FIG. 1 is a schematic view showing a tire mounting structure according to Embodiment 1. FIG.

  Hereinafter, the best mode for carrying out the present invention (hereinafter referred to as an embodiment) will be described in detail with reference to the drawings. In the description of the drawings, the same elements are denoted by the same reference numerals, and repeated descriptions are omitted as appropriate.

(Embodiment 1)
FIG. 1 is a schematic diagram illustrating an overview of a tire air pressure monitoring system in a vehicle including the tire mounting structure according to the first embodiment.

  The vehicle body 1 of the vehicle 100 is provided with four traveling tires 2 that cause the vehicle to travel by grounding and rotating on the road surface. In addition, a spare tire 4 is mounted on the vehicle body 1 in case an abnormality occurs in any of the traveling tires 2. The position where the spare tire 4 is mounted is, for example, the rear door 1a of the vehicle body 1 or the lower part of the trunk room. FIG. 1 shows a state where the spare tire 4 is mounted on the rear door 1a.

  The tire pressure monitoring system includes a wheel state detection unit 6, an initiator 10, a receiver 12, and an ECU 14. The wheel state detection unit 6 is provided in each of the four traveling tires 2 and the spare tire 4. The wheel state detection unit 6 includes a sensor (not shown) that detects the state of each attached tire, and a transmitter (not shown) that transmits a detection value of the sensor as wheel state information. Examples of the sensor include an air pressure sensor that detects tire air pressure and a temperature sensor that detects tire internal temperature. The wheel state detection unit 6 is provided with a G sensor 8 for detecting the acceleration of the wheel. The initiator 10 is provided at a predetermined position of the vehicle body 1 and transmits a trigger signal to the transmitter of the wheel state detection unit 6. The receiver 12 is provided at a predetermined position of the vehicle body 1, receives wheel state information transmitted from the transmitter of the wheel state detection unit 6, and sends the received wheel state information to the ECU 14. The ECU 14 is configured as a microprocessor including a CPU, an arithmetic unit for performing calculations by the microcomputer, a ROM for storing various processing programs, and temporarily storing data and programs for data storage and program execution. It has a RAM used as a work area, an input / output port for transmitting and receiving various signals, and the like.

  In the tire pressure monitoring system having such a configuration, the wheel state detection unit 6 provided in the traveling tire 2 detects wheel pressure, tire temperature, and the like to generate wheel state information. Then, the transmitter of the wheel state detection unit 6 receives the trigger signal from the initiator 10 and periodically transmits the wheel state information to the receiver 12 on the vehicle body 1 side. The receiver 12 receives a signal wirelessly transmitted from each wheel state detection unit 6 of each traveling tire 2 and sends the signal to the ECU 14. ECU14 acquires wheel state information, and when abnormality is recognized in the air pressure, temperature, etc. of traveling tire 2, it issues a warning to a driver by a display device (not shown) or a buzzer (not shown). The ECU 14 may display a warning on a display unit (not shown) of the navigation system.

  On the other hand, the wheel state detection unit 6 provided in the spare tire 4 is attached to the vehicle body 1 by the tire mounting structure described later, so that the position of the wheel state detection unit 6 is relative to the vehicle body 1, in other words, to the initiator 10. It is determined to be a predetermined position. Thereby, ECU14 can distinguish the wheel state information transmitted from the wheel state detection unit 6 provided in the spare tire 4 from the wheel state information transmitted from the wheel state detection unit 6 of the traveling tire 2.

  Next, the tire mounting structure according to this embodiment will be described in detail. FIG. 2 is a schematic diagram illustrating a tire mounting structure according to the first embodiment.

  As shown in FIG. 2, the spare tire 4 includes a tire 4a and a wheel 4b. A wheel rim (not shown) formed in a cylindrical shape is provided on the outer periphery of the wheel 4b, and a tire 4a is assembled on the outer periphery of the wheel rim. Thus, a tire air chamber is formed in a region surrounded by the inside of the tire 4a and the outer periphery of the wheel rim. In the wheel 4b, five holes 4b1 for attachment to the vehicle body side are formed so as to be arranged at equal intervals on the circumference of the same radius.

  On the other hand, the rear door 1a of the vehicle body 1 has a spare tire mounting region 16 at a predetermined position. In the spare tire mounting region 16, five spare tire supporting bolts 16a are provided so as to be arranged at equal intervals on the circumference of the same radius. The bolt 16a is arranged so as to correspond to the position of the hole 4b1 of the wheel 4b. The spare tire 4 is disposed in the spare tire mounting area 16 of the rear door 1a, and the bolt 16a is inserted into the five holes 4b1, and a nut (not shown) is screwed into the tip of the bolt 16a to mount the spare tire. The spare tire 4 can be attached to the vehicle body 1 by being attached to the region 16.

  Here, the tire attachment structure according to the present embodiment includes a first engagement portion 18 provided in the spare tire 4 and a second engagement provided in the spare tire attachment region 16 and engaged with the first engagement portion 18. And a joint section 20. Specifically, an engagement hole as the first engagement portion 18 is formed at a predetermined position excluding the center of the wheel 4b. Further, in the spare tire mounting region 16, an engagement protrusion as the second engaging portion 20 is projected at a position corresponding to the first engaging portion 18 of the spare tire 4 arranged in the spare tire mounting region 16. Yes.

  The first engaging portion 18 and the second engaging portion 20 are configured so that when the spare tire 4 is attached to the spare tire attachment region 16, the transmitter of the wheel state detection unit 6 provided in the spare tire 4 is The positional relationship is determined so as to be a predetermined position relative to the vehicle body 1. Specifically, when the spare tire 4 is disposed in the spare tire mounting region 16 and the first engagement portion 18 and the second engagement portion 20 are aligned, the wheel state detection provided in the spare tire 4 is detected. The positional relationship between the first engagement portion 18 and the second engagement portion 20 is determined so that the transmitter of the unit 6 is within the area A surrounded by the dotted line in FIG.

  In such a configuration, the spare tire 4 is disposed in the spare tire mounting region 16, the five holes 4b1 and the five bolts 16a are aligned, and the first engagement portion 18 and the second engagement portion 20 are aligned. Aligned. Then, when the bolt 16a is inserted into the hole 4b1, the second engaging portion 20 is inserted (engaged) into the first engaging portion 18, and a nut is screwed onto the tip of the bolt 16a, the spare tire 4 is engaged. The spare tire 4 is attached to the rear door 1a in a state where the transmitter of the provided wheel state detection unit 6 exists in the area A. Thereby, ECU14 can distinguish the wheel state information transmitted from the wheel state detection unit 6 provided in the spare tire 4 from the wheel state information transmitted from the wheel state detection unit 6 of the traveling tire 2.

  Summarizing the operational effects of the configuration described above, the tire mounting structure according to the present embodiment is the first engaging portion 18 provided in the spare tire 4 and the second engaging portion 16 provided in the spare tire mounting region 16 of the vehicle body 1. Engaging portion 20. The first engagement portion 18 and the second engagement portion 20 are in a positional relationship with each other so that the transmitter of the wheel state detection unit 6 provided in the spare tire 4 is at a predetermined position with respect to the vehicle body 1. Is stipulated. In other words, a positioning projection is provided on the mounting side of the vehicle body 1 on which the spare tire 4 is mounted, a positioning hole is provided on the wheel 4b side of the corresponding spare tire 4, and the projection and the hole are aligned, whereby the spare tire The position of the transmitter of the wheel state detection unit 6 provided at 4 is set to a predetermined position. Therefore, the information transmitted from the wheel state detection unit 6 provided in the traveling tire 2 and the information transmitted from the wheel state detection unit 6 provided in the spare tire 4 can be more reliably distinguished. Therefore, the tire mounting structure according to the present embodiment can be suitably employed in the vehicle 100 including the tire pressure monitoring system.

  Further, since the position of the transmitter of the wheel state detection unit 6 provided in the spare tire 4 can be determined at a predetermined position, in the case of a tire pressure monitoring system capable of displaying the wheel position, the position of the spare tire 4 is set. It becomes possible to display accurately. Further, according to the tire mounting structure according to the present embodiment, the position of the wheel state detection unit 6 of the spare tire 4 can be determined with a very simple configuration in which only the first engagement portion 18 and the second engagement portion 20 are provided. Can be prescribed.

  The present invention is not limited to the above-described embodiment, and an appropriate combination of the elements of the embodiment is also effective as an embodiment of the present invention. Various modifications such as design changes can be added to the embodiments based on the knowledge of those skilled in the art, and the embodiments to which such modifications are added can be included in the scope of the present invention. . The configuration shown in each figure is for explaining an example, and any configuration that can achieve the same function can be changed as appropriate, and the same effect can be obtained.

  DESCRIPTION OF SYMBOLS 1 Car body, 2 Running tire, 4 Spare tire, 6 Wheel state detection unit, 8 G sensor, 10 Initiator, 12 Receiver, 14 ECU, 16 Spare tire attachment area, 18 1st engaging part, 20 2nd engaging part .

Claims (1)

A tire mounting structure for detecting a wheel state and attaching a spare tire provided with a wheel state detection unit that wirelessly transmits the detected wheel state to the outside as wheel state information,
A first engagement portion provided on the spare tire;
A second engagement portion that is provided in a spare tire attachment region of a vehicle body and engages with the first engagement portion when the spare tire is attached to the spare tire attachment region;
The first engagement portion and the second engagement portion are in a positional relationship with each other such that a transmitter included in the wheel state detection unit provided in the spare tire is in a predetermined position with respect to the vehicle body. A tire mounting structure characterized by being defined.

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