JP2016130049A - Tire air pressure sensor - Google Patents

Tire air pressure sensor Download PDF

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JP2016130049A
JP2016130049A JP2015004154A JP2015004154A JP2016130049A JP 2016130049 A JP2016130049 A JP 2016130049A JP 2015004154 A JP2015004154 A JP 2015004154A JP 2015004154 A JP2015004154 A JP 2015004154A JP 2016130049 A JP2016130049 A JP 2016130049A
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valve
pressure sensor
tire
air pressure
tire pressure
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JP6530605B2 (en
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豊福　雅宣
Masanori Toyofuku
雅宣 豊福
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Bridgestone Corp
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Abstract

PROBLEM TO BE SOLVED: To provide an exterior part attachment type tire air pressure sensor which makes air leakage less likely to occur compared to a conventional tire air pressure sensor and is securely attached to a valve tip.SOLUTION: A tire air pressure detection device 10 is attached to a tip of a valve 20 of a tire and includes: a valve core presser 11 for pressing a valve core 21; an air pressure sensor 12 for detecting an air pressure of the tire; and a coupled metal part 13 coupled to the valve 20. A seal member 14 is disposed in a position located at an inner periphery of the coupled metal part 13 and contacting with a side surface of the valve 20. The tire air pressure detection device 10 has a structure in which an opening part of the valve 20 and an inner peripheral surface of the coupled metal part 13 facing the opening part contact with each other when the tire air pressure detection device 10 is attached to the valve 20.SELECTED DRAWING: Figure 1

Description

本発明は、タイヤ空気圧センサに関し、詳しくは、従来よりも空気漏れが生じにくく、かつ、バルブ先端に強固に装着することができる、外部取り付けタイプのタイヤ空気圧センサに関する。   The present invention relates to a tire pressure sensor, and more particularly to an externally mounted tire pressure sensor that is less likely to cause air leakage than before and can be firmly attached to a valve tip.

従来から、車両のリムに取り付けられて、タイヤの空気圧を検出し、この空気圧に関する情報を、電波により車両側に設けた受信機に送信し、空気圧の異常を運転者に知らせるためのタイヤ内圧警報装置が知られている。従来からタイヤ内の空気圧を監視する手段として、電波式のタイヤ圧力モニタリングシステム（ＴＰＭＳ：Ｔｉｒｅ Ｐｒｅｓｓｕｒｅ Ｍｏｎｉｔｏｒｉｎｇ Ｓｙｓｔｅｍ）が使用されている。タイヤ圧力モニタリングシステムには、バルブの後端部に取付けられるセンサ一体型の送信器をタイヤの内側に取り付けるタイプと、バルブの先端に取り付け、センサ一体型の送信器をバルブキャップの代わりとして用いる外部取り付けタイプと、がある。   Conventionally, a tire internal pressure alarm is attached to a rim of a vehicle to detect the tire air pressure, send information on the air pressure to a receiver provided on the vehicle side by radio waves, and notify the driver of the air pressure abnormality. The device is known. Conventionally, a radio wave type tire pressure monitoring system (TPMS: Tire Pressure Monitoring System) has been used as means for monitoring the air pressure in the tire. There are two types of tire pressure monitoring systems: a sensor-integrated transmitter that is attached to the rear end of the valve, and a sensor-integrated transmitter that replaces the valve cap. There are mounting types.

内部取り付けタイプのタイヤ空気圧センサは、圧力センサ、信号処理回路および電池がリム内に設置されているため、取付けや取外しまたは交換するためには、そのたびタイヤをリムから取り外さなければならず、作業が煩雑であった。これに対して、外部取り付けタイプのタイヤ空気圧センサは、圧力センサ、信号処理回路および電池はバルブキャップ代わりのタイヤ空気圧センサの内部に設置されているため、タイヤをホイールから外す必要がなく、また、バルブキャップと取り替えるだけであるため、非常に簡単に取り付けや取外しまたは交換が可能であるという利点を有している。   Internally mounted tire pressure sensors have pressure sensors, signal processing circuits and batteries installed in the rim, so the tire must be removed from the rim each time it is installed, removed or replaced. Was cumbersome. On the other hand, in the externally mounted tire pressure sensor, the pressure sensor, signal processing circuit and battery are installed inside the tire pressure sensor instead of the valve cap, so there is no need to remove the tire from the wheel, Since it only needs to be replaced with a valve cap, it has the advantage that it can be installed, removed or replaced very easily.

バルブの先端に取り付けるタイプのタイヤ空気圧センサとして、例えば、特許文献１では、設置や交換が容易で、かつ、空気圧センサを有するバルブキャップをリムと接触させることで、バルブキャップが揺れずに安定する構造が提案されている。   As a tire pressure sensor of a type that is attached to the tip of a valve, for example, in Patent Document 1, installation and replacement are easy, and the valve cap having the air pressure sensor is brought into contact with the rim, so that the valve cap is stabilized without shaking. A structure has been proposed.

特開２００６−６２４１４号公報JP 2006-62414 A

しかしながら、バルブの先端に取り付けるタイプのタイヤ空気圧センサは、タイヤの空気圧をセンサに導くために、常にバルブコア（虫）を押している必要がある。したがって、タイヤ空気圧センサの取り付けに緩みが生じると、タイヤから空気が漏れる可能性がある。そのため、タイヤから空気の漏れがないよう、従来からタイヤ空気圧センサの構造に関して検討がなされているが、安全性の観点から、さらなる改善が望まれている。また、タイヤ空気圧センサのバルブへの装着をより強固なものとすることも、タイヤの空気漏れの観点から重要であり、今後も一層の改善が望まれる。   However, the tire pressure sensor of the type attached to the tip of the valve must always push the valve core (insect) in order to guide the tire air pressure to the sensor. Therefore, if the tire pressure sensor is loosely attached, air may leak from the tire. Therefore, the structure of the tire pressure sensor has been conventionally studied so that there is no air leakage from the tire, but further improvement is desired from the viewpoint of safety. Further, it is important from the viewpoint of tire air leakage to further strengthen the mounting of the tire pressure sensor on the valve, and further improvement is desired in the future.

そこで、本発明の目的は、従来よりも空気漏れが生じにくく、かつ、バルブ先端に強固に装着することができる、外部取り付けタイプのタイヤ空気圧センサを提供することにある。   SUMMARY OF THE INVENTION An object of the present invention is to provide an externally attached tire pressure sensor that is less likely to cause air leakage than before and can be firmly attached to the tip of a valve.

本発明者は、上記課題を解消するために鋭意検討した結果、従来のタイヤ空気圧センサにつき、以下の知見を得た。図２に、従来の外部取り付けタイプのタイヤ空気圧センサのバルブ装着時における概略断面図を示す。従来のタイヤ空気圧センサ１１０を、バルブ１２０先端にねじ込んで取り付けると、バルブコア押し１１１によりバルブコア１２１の先端が押し込まれ、エアシールが外されて、タイヤ内の空気がタイヤ空気圧センサ１１０内に流れ込む。さらに、タイヤ空気圧センサ１１０をバルブ１２０にねじ込むと、バルブ１２０の先端が空気密閉用のシール部材１１４（図示例においては、平パッキン１１４）に接触し、タイヤ内の空気圧が再び機密される。この状態で、タイヤ内の空気がタイヤ空気圧センサ１１０の空気圧センサ１１２に導かれるので、タイヤ空気圧の測定が可能となる。   As a result of intensive studies to solve the above-mentioned problems, the present inventor has obtained the following knowledge about conventional tire pressure sensors. FIG. 2 shows a schematic cross-sectional view of a conventional externally attached tire pressure sensor when the valve is mounted. When the conventional tire pressure sensor 110 is screwed and attached to the tip of the valve 120, the tip of the valve core 121 is pushed in by the valve core push 111, the air seal is removed, and the air in the tire flows into the tire pressure sensor 110. Further, when the tire pressure sensor 110 is screwed into the valve 120, the tip of the valve 120 comes into contact with the sealing member 114 for air sealing (in the illustrated example, the flat packing 114), and the air pressure in the tire is kept secret again. In this state, the air in the tire is guided to the air pressure sensor 112 of the tire air pressure sensor 110, so that the tire air pressure can be measured.

しかしながら、空気密閉の構造が、バルブ１２０先端の平パッキン１１４への圧着のために、バルブ１２０とタイヤ空気圧センサ１１０の結合金属部１１３の締め付けトルクを高くすることは困難である。すなわち、気密性を上げるために、バルブ１２０とタイヤ空気圧センサ１１０とを強く締め付けようとすると、平パッキン１１４にバルブ１２０の先端が食い込み、平パッキン１１４が破損してしまうため、さらに気密性が低下してしまう。そのため、バルブ１２０とタイヤ空気圧センサ１１０の締め付けが緩みやすく、しかも少し緩んだ状態では気密性が保たれない可能性がある。また、タイヤ空気圧センサ１１０の取り付け、取り外しの際には少量ではあるが空気漏れが生じる。   However, it is difficult to increase the tightening torque of the coupling metal portion 113 of the valve 120 and the tire pressure sensor 110 because the air-tight structure is pressure-bonded to the flat packing 114 at the tip of the valve 120. That is, if the valve 120 and the tire pressure sensor 110 are tightened strongly in order to increase the airtightness, the tip of the valve 120 bites into the flat packing 114 and the flat packing 114 is damaged, so that the airtightness is further reduced. Resulting in. Therefore, the tightening of the valve 120 and the tire pressure sensor 110 is easy to loosen, and there is a possibility that the airtightness may not be maintained in a slightly loose state. In addition, when the tire pressure sensor 110 is attached or detached, air leakage occurs although the amount is small.

本発明者は、上記知見を基にさらに鋭意検討した結果、外部取り付けタイプのタイヤ空気圧センサの構造を下記のとおりとすることで、上記課題を解消することができることを見出し、本発明を完成するに至った。   As a result of further intensive studies based on the above knowledge, the present inventor has found that the above problems can be solved by setting the structure of an externally attached tire pressure sensor as follows, and completes the present invention. It came to.

すなわち、本発明のタイヤ空気圧センサ１０は、タイヤのバルブの先端に装着するタイヤ空気圧センサであって、バルブコアを押下するバルブコア押し１１と、タイヤの空気圧を検出する空気圧センサ１２と、バルブと結合する結合金属部１３とを備え、
前記結合金属部１３の内周であって、前記バルブの側面と接する位置にシール部材１４が配置されてなり、かつ、バルブに装着したとき、前記バルブの開口部と、該開口部と相対する前記結合金属部１３の内周面と、が接触する構造を有することを特徴とするものである。 That is, the tire pressure sensor 10 of the present invention is a tire pressure sensor that is attached to the tip of a tire valve, and is coupled to a valve core push 11 that pushes down the valve core, an air pressure sensor 12 that detects the tire air pressure, and the valve. A coupling metal part 13;
A seal member 14 is disposed at an inner periphery of the coupling metal portion 13 and in contact with a side surface of the valve. When the seal member 14 is attached to the valve, the valve opening and the opening are opposed to each other. The coupling metal portion 13 has a structure in contact with the inner peripheral surface.

本発明のタイヤ空気圧センサ１０においては、前記バルブとの結合が螺着であり、かつ、前記シール部材１４が前記結合金属部１３に設けられたネジ部よりも、前記結合金属部１３の開口部側に位置することが好ましい。   In the tire pressure sensor 10 according to the present invention, the coupling with the valve is screwed, and the seal member 14 has an opening portion of the coupling metal portion 13 rather than a screw portion provided in the coupling metal portion 13. It is preferably located on the side.

本発明によれば、従来よりも空気漏れが生じにくく、かつ、バルブ先端に強固に装着することができる、外部取り付けタイプのタイヤ空気圧センサを提供することができる。   According to the present invention, it is possible to provide an externally attached type tire pressure sensor that is less likely to cause air leakage than before and can be firmly attached to a valve tip.

本発明の一好適な実施の形態に係るタイヤ空気圧センサのバルブ装着時における概略断面図である。It is a schematic sectional drawing at the time of valve | bulb mounting | wearing of the tire pressure sensor which concerns on one preferable embodiment of this invention. 従来の外部取り付けタイプのタイヤ空気圧センサのバルブ装着時における概略断面図である。It is a schematic sectional drawing at the time of valve | bulb mounting of the conventional external attachment type tire pressure sensor.

以下、本発明の実施の形態を図面を用いて詳細に説明する。
図１は、本発明の一好適な実施の形態に係るタイヤ空気圧センサ１０のバルブ装着時における概略断面図である。図示するように、本発明のタイヤ空気圧センサ１０は、タイヤのバルブ２０の先端に取り付けるタイプのものである。本発明のタイヤ空気圧センサ１０は、バルブコア２１を押下するバルブコア押し１１と、タイヤの空気圧を検出する空気圧センサ１２と、バルブ２０と結合する結合金属部１３と、を備えている。図示する例においては、バルブ２０の外周、およびタイヤ空気圧センサ１０の結合金属部１３の内周にはネジ山が設けられており、タイヤ空気圧センサ１０は、結合金属部１３とバルブ１０との螺着により結合されている。 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a schematic cross-sectional view of a tire pressure sensor 10 according to a preferred embodiment of the present invention when a valve is mounted. As shown in the figure, the tire pressure sensor 10 of the present invention is of a type attached to the tip of a tire valve 20. The tire pressure sensor 10 of the present invention includes a valve core push 11 that pushes down the valve core 21, a pneumatic sensor 12 that detects the tire air pressure, and a coupling metal portion 13 that is coupled to the valve 20. In the illustrated example, threads are provided on the outer periphery of the valve 20 and the inner periphery of the coupling metal portion 13 of the tire pressure sensor 10, and the tire pressure sensor 10 is screwed between the coupling metal portion 13 and the valve 10. Combined by wearing.

本発明のタイヤ空気圧センサ１０においては、結合金属部１３の内周であって、バルブ２０に取り付けた際に、バルブ２０の側面と接する位置にシール部材１４（図示例においてはＯリング１４）が配置されている。すなわち、図示する本発明のタイヤ空気圧センサ１０においては、気密性をバルブ２０の胴部側面でＯリング１４により保つ構造となっている。このような構造とすることにより、バルブコア押し１１によりバルブコア２１の先端の開口部が押される前に、Ｏリング１４によりタイヤ空気圧センサ１０の気密性が確保できる。そのため、タイヤ空気圧センサ１０の取り付け時、取り外し時における空気漏れを防止することができる。   In the tire pressure sensor 10 of the present invention, the seal member 14 (O-ring 14 in the illustrated example) is located at the inner periphery of the joint metal portion 13 and in contact with the side surface of the valve 20 when attached to the valve 20. Has been placed. That is, in the illustrated tire pressure sensor 10 of the present invention, the airtightness is maintained by the O-ring 14 on the side surface of the body portion of the valve 20. With such a structure, the air tightness of the tire air pressure sensor 10 can be secured by the O-ring 14 before the opening at the tip of the valve core 21 is pushed by the valve core push 11. Therefore, it is possible to prevent air leakage when the tire pressure sensor 10 is attached or removed.

また、バルブ２０とタイヤ空気圧センサ１０の結合金属部１３に緩みが発生しても、Ｏリング１４による気密性が確保されているため、空気漏れを防止することができる。例え、Ｏリング１４による気密性が失われるほどバルブ２０と結合金属部１３との間に緩みが生じても、このような場合は、バルブコア２１がバルブコア押し１１の押し込みから解放されているため、空気が漏れることはない。   Even if the coupling metal portion 13 between the valve 20 and the tire pressure sensor 10 is loosened, air leakage can be prevented because the airtightness by the O-ring 14 is ensured. Even if the valve 20 and the coupling metal portion 13 are loosened so that the airtightness due to the O-ring 14 is lost, in this case, the valve core 21 is released from the pushing of the valve core push 11, Air does not leak.

また、本発明のタイヤ空気圧センサ１０においては、バルブ２０に装着したとき、バルブ２０の開口部と、このバルブ２０の開口部と相対する結合金属部１３の内周面（結合金属部１３の底面）とが接触する。バルブ２０の開口部が結合金属部１３と直接接触するため、すなわち、バルブ１０の先端にシール部材を配置しないため、タイヤ空気圧センサ１０の締め付けトルクを高くすることができる。これにより、タイヤ空気圧センサ１０の緩みの発生を抑制することが可能となる。このように、本発明のタイヤ空気圧センサ１０では、バルブ２０との結合の緩みの発生が低く、例え緩みが発生してもタイヤの空気漏れの発生を防止することができる。   Moreover, in the tire pressure sensor 10 of the present invention, when mounted on the valve 20, the opening of the valve 20 and the inner peripheral surface of the coupling metal portion 13 facing the opening of the valve 20 (the bottom surface of the coupling metal portion 13). ) Come into contact. Since the opening portion of the valve 20 is in direct contact with the coupling metal portion 13, that is, no sealing member is disposed at the tip of the valve 10, the tightening torque of the tire pressure sensor 10 can be increased. Thereby, it is possible to suppress the occurrence of looseness of the tire pressure sensor 10. As described above, in the tire pressure sensor 10 of the present invention, the occurrence of loose coupling with the valve 20 is low, and even if the looseness occurs, the occurrence of tire air leakage can be prevented.

本発明のタイヤ空気圧センサ１０においては、図示するように、シール部材１４は結合金属部１３に設けられたネジ部１３ａよりも開口部側に位置することが好ましい。取り付け時に、バルブの開口部と相対する結合金属部１３の内周面（結合金属部１３の底面）近傍に、シール部材が配置されていると、バルブ２０と結合金属部１３との結合が緩んだ際、シール部材によるシール性が損なわれやすく、タイヤの空気が外部に漏れてしまう場合があるからである。   In the tire pressure sensor 10 of the present invention, as shown in the drawing, the seal member 14 is preferably located closer to the opening than the screw portion 13 a provided in the coupling metal portion 13. When the seal member is disposed in the vicinity of the inner peripheral surface of the coupling metal portion 13 (the bottom surface of the coupling metal portion 13) facing the valve opening at the time of attachment, the coupling between the valve 20 and the coupling metal portion 13 is loosened. This is because the sealing performance of the sealing member is likely to be impaired and the tire air may leak to the outside.

本発明のタイヤ空気圧センサ１０においては、シール部材１４としては、図示するように、Ｏリング１４を好適に用いることができるが、タイヤ空気圧センサ１０からの空気の漏れを防止できるものであれば、特に制限はない。また、シール部材１４の材質としては、ゴム等の弾性材料が好適であり、例えばシリコンゴム、フッ素ゴム、ニトリルゴム等からなるものを好適に用いることができるが、これに限定されるものではない。   In the tire pressure sensor 10 of the present invention, as shown in the drawing, an O-ring 14 can be suitably used as the seal member 14, but if it can prevent air leakage from the tire pressure sensor 10, There is no particular limitation. The material of the seal member 14 is preferably an elastic material such as rubber. For example, a material made of silicon rubber, fluorine rubber, nitrile rubber, or the like can be preferably used, but is not limited thereto. .

本発明のタイヤ空気圧センサ１０は、タイヤ空気圧センサ１０の結合金属部１３の内周であって、バルブ１０の側面に接触する位置にシール部材１４が配置されてなり、かつ、バルブ２０に装着したとき、バルブ２０の開口部と、バルブ２０の開口部と相対する結合金属部１３の内周面（結合金属部１３の底面）とが接触する構造を有するものであれば特に制限はなく、それ以外は既知の構造とすることができる。例えば、空気圧センサ１２で検出したタイヤの空気圧信号を処理する信号処理回路、信号処理回路で処理された情報を車両のモニタ等に送信する通信手段、これら電子機器を動作させるための電池、これらを収納するケーシング等は、既知のものを用いることができる。なお、本発明のタイヤ空気圧センサ１０を取り付けることができる車両は特に制限はなく、トラックバス用タイヤや乗用車用タイヤ等の四輪車や二輪車に限られず、三輪車であってもよい。   The tire pressure sensor 10 according to the present invention has an inner periphery of the coupling metal portion 13 of the tire pressure sensor 10, a seal member 14 is disposed at a position in contact with the side surface of the valve 10, and is mounted on the valve 20. There is no particular limitation as long as it has a structure in which the opening of the valve 20 and the inner peripheral surface of the coupling metal portion 13 (the bottom surface of the coupling metal portion 13) facing the opening of the valve 20 are in contact with each other. Other than the above can be a known structure. For example, a signal processing circuit for processing a tire pressure signal detected by the air pressure sensor 12, a communication means for transmitting information processed by the signal processing circuit to a vehicle monitor, a battery for operating these electronic devices, Known casings can be used. The vehicle to which the tire pressure sensor 10 of the present invention can be attached is not particularly limited, and is not limited to a four-wheeled vehicle or a two-wheeled vehicle such as a truck bus tire or a passenger tire, and may be a three-wheeled vehicle.

１０，１１０ タイヤ空気圧センサ
１１，１１１ バルブコア押し
１２，１１２ 空気圧センサ
１３，１１３ 結合金属部
１３ａ，１１３ａ ネジ部
１４，１１４ シール部材
２０，１２０ バルブ
２１，１２１ バルブコア 10, 110 Tire pressure sensor 11, 111 Valve core push 12, 112 Air pressure sensor 13, 113 Coupling metal part 13a, 113a Screw part 14, 114 Seal member 20, 120 Valve 21, 121 Valve core

Claims (2)

タイヤのバルブの先端に装着するタイヤ空気圧センサであって、バルブコアを押下するバルブコア押しと、タイヤの空気圧を検出する空気圧検出手段と、バルブと結合する結合金属部とを備え、
前記結合金属部の内周であって、前記バルブの側面と接する位置にシール部材が配置されてなり、かつ、バルブに装着したとき、前記バルブの開口部と、該開口部と相対する前記結合金属部の内周面と、が接触する構造を有することを特徴とするタイヤ空気圧センサ。 A tire air pressure sensor to be attached to the tip of a tire valve, comprising: a valve core push for pushing down the valve core; an air pressure detecting means for detecting the tire air pressure; and a coupling metal portion coupled to the valve;
A seal member is disposed at an inner periphery of the coupling metal portion and in contact with a side surface of the valve, and when the valve is mounted on the valve, the valve opening and the coupling facing the opening A tire pressure sensor characterized by having a structure in which the inner peripheral surface of the metal part comes into contact. 前記バルブとの結合が螺着であり、かつ、前記シール部材が前記結合金属部に設けられたネジ部よりも、前記結合金属部の開口部側に位置する請求項１記載のタイヤ空気圧センサ。
2. The tire pressure sensor according to claim 1, wherein the coupling with the valve is screwed, and the seal member is located closer to the opening of the coupling metal portion than a screw portion provided in the coupling metal portion.
JP2015004154A 2015-01-13 2015-01-13 Tire pressure sensor Expired - Fee Related JP6530605B2 (en)

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CN106739850A (en) * 2016-12-29 2017-05-31 上海为彪汽配制造有限公司 A kind of tyre pressure adjusting device and tire pressure adjusting method
CN113895185A (en) * 2021-11-23 2022-01-07 保隆霍富(上海)电子有限公司 Tire pressure sensor and valve assembly
WO2023123831A1 (en) * 2021-12-30 2023-07-06 万通智控科技股份有限公司 Threaded fixing structure
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CN106739850A (en) * 2016-12-29 2017-05-31 上海为彪汽配制造有限公司 A kind of tyre pressure adjusting device and tire pressure adjusting method
CN113895185A (en) * 2021-11-23 2022-01-07 保隆霍富(上海)电子有限公司 Tire pressure sensor and valve assembly
CN113895185B (en) * 2021-11-23 2023-09-01 保隆霍富(上海)电子有限公司 Tire pressure sensor and valve assembly
WO2023123831A1 (en) * 2021-12-30 2023-07-06 万通智控科技股份有限公司 Threaded fixing structure
US11738607B1 (en) 2022-07-12 2023-08-29 Astra Sensor Technologies Corp. Tire pressure monitoring system (TPMS) sensor with easily removable and replaceable battery

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