WO2018135463A1 - Eddy current type instrument - Google Patents

Eddy current type instrument Download PDF

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Publication number
WO2018135463A1
WO2018135463A1 PCT/JP2018/000949 JP2018000949W WO2018135463A1 WO 2018135463 A1 WO2018135463 A1 WO 2018135463A1 JP 2018000949 W JP2018000949 W JP 2018000949W WO 2018135463 A1 WO2018135463 A1 WO 2018135463A1
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WO
WIPO (PCT)
Prior art keywords
cover member
side wall
eddy current
resistance
wall portion
Prior art date
Application number
PCT/JP2018/000949
Other languages
French (fr)
Japanese (ja)
Inventor
恵理 海津
友美 山崎
Original Assignee
日本精機株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 日本精機株式会社 filed Critical 日本精機株式会社
Priority to CN201880007633.1A priority Critical patent/CN110214276B/en
Priority to JP2018563324A priority patent/JP6939818B2/en
Publication of WO2018135463A1 publication Critical patent/WO2018135463A1/en

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D11/00—Component parts of measuring arrangements not specially adapted for a specific variable
    • G01D11/10—Elements for damping the movement of parts
    • G01D11/12—Elements for damping the movement of parts using fluid damping
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P1/00—Details of instruments
    • G01P1/02—Housings
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
    • G01P3/42—Devices characterised by the use of electric or magnetic means
    • G01P3/44—Devices characterised by the use of electric or magnetic means for measuring angular speed
    • G01P3/49—Devices characterised by the use of electric or magnetic means for measuring angular speed using eddy currents
    • G01P3/495—Devices characterised by the use of electric or magnetic means for measuring angular speed using eddy currents where the indicating means responds to forces produced by the eddy currents and the generating magnetic field

Definitions

  • the present invention relates to an eddy current type instrument provided with a resin cover member.
  • An eddy current type instrument disclosed in Patent Document 1 includes a base, a first rotating shaft rotatably supported by the base, and the first rotating shaft attached to the first rotating shaft and rotating together with the first rotating shaft.
  • the magnetic body, the top plate portion covered by the base portion, the second rotation shaft rotatably supported by the top plate portion, and the magnetic body rotated by the second rotation shaft are rotated.
  • the base part of the eddy current type instrument shown in Patent Document 1 has a substantially U shape. Eddy current meters are sometimes used even in environments where dust rises, and high dust resistance is required.
  • the present invention has an object to provide an eddy current type instrument having a high resistance to vibration while having a small number of parts on the assumption that a resin cover member is used.
  • a base a first rotary shaft rotatably supported by the base, a magnetic body attached to the first rotary shaft and rotating together with the first rotary shaft, Rotating by a cover member covered by the base, a second rotating shaft rotatably supported by the cover member, and an eddy current generated when the magnetic body rotates by being supported by the second rotating shaft
  • An eddy-current meter having a rotor and a damper mechanism provided above the rotor to suppress overrotation of the rotor
  • the cover member is made of resin as a material, and has a side wall portion that surrounds the side of the rotor, and a top plate portion that covers the upper end of the side wall portion
  • the damper mechanism includes a cup-shaped cup portion provided on the second rotating shaft, oil filled in the cup portion, and a resistance portion that is lowered from the top plate portion and has a tip immersed in the oil.
  • having An eddy current meter is provided in which a reinforcing wall portion extending from the
  • the side wall portion includes a side wall concave portion that is recessed from the general surface portion toward the axis of the second rotation shaft and has a substantially arc shape in the bottom view of the cover member,
  • the reinforcing wall portion includes a recessed portion reinforcing wall portion extending from the resistance portion to the side wall recessed portion.
  • the side wall recess and the recess reinforcement wall are both formed at a plurality of locations
  • the reinforcing wall portion includes a general portion reinforcing wall portion extending from the resistance portion to the general surface portion at an intermediate position between the adjacent recessed portion reinforcing wall portions.
  • the reinforcing wall portion extending from the resistance portion to the side wall portion is formed integrally with the cover member and the resistance portion.
  • a load such as vibration may be applied to the resistance portion.
  • This vibration is transmitted to the side wall portion through the reinforcing wall portion.
  • the resistance portion, the reinforcing wall portion, and the side wall portion are integrally formed by one member. For this reason, the number of parts can be reduced as compared with the case where these are provided separately.
  • On the premise of using a resin cover member it is possible to provide an eddy current type instrument having a high resistance to vibration while having a small number of parts.
  • the reinforcing wall portion includes a recessed portion reinforcing wall portion extending from the resistance portion to the side wall recessed portion.
  • the inventors of the present invention have found that resistance to vibration can be increased by providing a recessed portion reinforcing wall portion extending to the recessed portion on the side wall.
  • the recessed portion reinforcing wall portion is recessed toward the axis of the second rotating shaft and extends toward the sidewall recessed portion having a substantially arc shape. For this reason, the vibration input to the resistance portion is transmitted to the side wall concave portion via the concave portion reinforcing wall portion. It is considered that the vibration transmitted to the side wall recess is further transmitted in various directions. That is, it is considered that the load received from vibration can be more dispersed.
  • the reinforcing wall portion includes a general portion reinforcing wall portion extending from the resistance portion to the general surface portion at an intermediate position between the adjacent recessed portion reinforcing wall portions.
  • FIG. 2 is a sectional view taken along line 2-2 of FIG.
  • FIG. 3 is a bottom view of the cover member shown in FIG. 2. It is a figure explaining the effect
  • left and right refer to the left and right based on the vehicle occupant
  • front and rear refer to the front and rear based on the traveling direction of the vehicle.
  • Fr indicates the front
  • Rr indicates the rear
  • Le indicates the left when viewed from the occupant
  • Ri indicates the right when viewed from the occupant
  • Up indicates the upper side
  • Dn indicates the lower side.
  • FIG. 1 shows an eddy current instrument 10 according to the present invention as viewed from above.
  • This eddy current type instrument 10 is mounted on a two-wheeled vehicle, for example, and used as a vehicle speedometer.
  • the eddy current meter 10 includes a case 11 having a substantially fan shape in plan view, a meter body 20 provided in the case 11, a dial 13 provided above the meter body 20, and a meter body. And a pointer 14 attached to 20.
  • the pointer 14 indicates the scale 15 displayed on the dial 13 according to the speed of the motorcycle. Thereby, the passenger
  • the meter body 20 includes a base 21, a bearing body 22 provided on the base 21, a first rotating body 30 rotatably supported by the bearing body 22, and a cover member 40 covered on the base 21.
  • the second rotating body 50 rotatably supported by the cover member 40, the damper mechanism 60 for suppressing the sudden rotation of the second rotating body 50, and the rotation direction of the second rotating body 50 And a spiral spring 27 that urges the second rotating body 50 in the opposite direction.
  • the base 21 is configured, for example, by press forming a general cold rolled steel plate (SPCC).
  • SPCC general cold rolled steel plate
  • An insertion hole 21 a is formed in the center of the base 21.
  • the bearing body 22 includes a metal cylindrical member 22a inserted into the insertion hole 21a, and a sintered metal sliding bearing 22b provided on the inner periphery of the cylindrical member 22a.
  • a bottom hole 11 c is formed in the bottom 11 a of the case 11. While the bearing body 22 is inserted into the bottom hole 11 c, the base 21 comes into contact with the bottom 11 a of the case 11, whereby the instrument body 20 is disposed in the case 11.
  • the first rotating body 30 includes a first rotating shaft 31 that is rotatably supported on the inner periphery of the sliding bearing 22b, and a cup-shaped magnetic guiding body 32 that is fixed to the upper portion of the first rotating shaft 31. And a disk-shaped magnetic body 33 fixed to the first rotating shaft 31 above the magnetic conductor 32. That is, the magnetic conductor 32 and the magnetic body 33 can rotate together with the first rotating shaft 31.
  • the upper end of the first rotating shaft 31 is rolled downward, and a bearing 34 is disposed at the rolled portion.
  • the cover member 40 is, for example, an injection-molded product by injection molding, and houses the side wall portion 41 raised from the edge of the base portion 21, the top plate portion 42 covering the upper end of the side wall portion 41, and the accumulator 17. And an accommodating portion 43.
  • the cover member 40 can employ polybutylene terephthalate resin (PBT) as a material.
  • the totalizer 17 indicates the travel distance of the vehicle.
  • a known structure is adopted for the structure of the accumulator 17. For this reason, detailed description is omitted.
  • a portion that is recessed from the general surface portion 41a of the side wall portion 41 toward the axis line CL of the second rotation shaft 51 and that has a substantially arc shape in the bottom view of the cover member 40 is referred to as a side wall recess portion 41b.
  • the recessed portion reinforcing wall portions 45 and 45 extend from the resistance portion 63 of the damper mechanism 60 to the two side wall recessed portions 41b and 41b, respectively.
  • the recessed portion reinforcing wall portion 45 extends from the resistance portion 63 to a substantially central position of the side wall recessed portion 41b. Details of the resistor 63 will be described later.
  • the general portion reinforcing wall portion 46 extends from the resistance portion 63 to the general surface portion at an intermediate position between the two concave portion reinforcing wall portions 45 and 45.
  • reinforcing wall portion includes both the recessed portion reinforcing wall portion 45 and the general portion reinforcing wall portion 46.
  • a circular support hole 42 a is formed in the top plate portion 42 on the axis line CL of the first rotation shaft 31. That is, the second rotating body 50 described below is disposed on the same axis CL as the first rotating shaft 31.
  • the second rotating body 50 includes a second rotating shaft 51 rotatably supported by the support hole 42a and the bearing 34, a rotor supporting portion 52 fixed to the second rotating shaft 51, and the rotor supporting portion. And a rotor 53 fixed to 52.
  • the rotor support portion 52 is formed of resin by insert molding.
  • the rotor 53 is made of a nonmagnetic metal, for example, aluminum, and is configured in a cup shape by press molding.
  • the damper mechanism 60 includes a cup-shaped cup portion 61 formed on the upper surface of the rotor support portion 52, an oil 62 filled in the cup portion 61, and extends downward from the top plate portion 42, and the tip is immersed in the oil 62. And a resistance portion 63.
  • the resistance portion 63 immersed in the oil 62 serves as a rotation resistance of the rotor 53 and can suppress vibration and over-rotation of the rotor 53.
  • the spiral spring 27 is disposed immediately above the cover member 40.
  • a central portion 27 a of the spiral spring 27 is press-fitted and fixed to the second rotating shaft 51.
  • An end portion 27 b of the spiral spring 27 is fixed to a fixing portion 48 formed integrally with the top plate portion 42.
  • the fixing portion 48 is deformed when a hot plate heated by a heater is pressed against it, and the end portion 27b of the spiral spring 27 is fixed.
  • a horizontal shaft 18 that meshes with the first rotating shaft 31 is provided below the magnetic conductor 32.
  • the horizontal shaft 18 is rotatably supported by the base portion 21.
  • the horizontal axis 18 is orthogonal to the first rotation axis 31 and transmits the rotation of the first rotation axis 31 to the accumulator 17.
  • FIG. 4A shows a cover member 140 of an eddy current type instrument 110 according to a comparative example. Vibration generated in the engine or the like is transmitted to a wide range of the vehicle. Part of the vibration is also transmitted to the cover member 140 of the eddy current instrument 110.
  • the resistance portion 163 is a cylindrical member formed integrally with the top plate portion 142 of the cover member 140. For this reason, a large load may be applied to the base portion of the resistance portion 163 due to the transmission of vibration. In this case, the support hole at the base portion of the resistance portion 163 vibrates greatly, so that rotational torque is generated on the second rotation shaft, and the pointer may be displaced from the original position.
  • FIG. 4B shows a cover member 40 of the eddy current type instrument 10 according to the embodiment.
  • Reinforcing wall portions 45 and 46 extending from the resistance portion 63 to the side wall portion 41 are formed integrally with the cover member 40 and the resistance portion 63.
  • a load such as vibration may be applied to the resistance portion 63.
  • the vibration is transmitted to the side wall portion 41 via the reinforcing wall portions 45 and 46.
  • the resistance part 63, the reinforcement wall parts 45 and 46, and the side wall part 41 are integrally formed by one member.
  • the number of parts can be reduced as compared with the case where these are provided separately.
  • the resin cover member 40 it is possible to provide the eddy current type instrument 10 having a high resistance to vibration while having a small number of parts.
  • the reinforcing wall portions 45 and 46 include a concave portion reinforcing wall portion 45 extending from the resistance portion 63 to the side wall concave portion 41b.
  • the present inventors have found that the resistance to vibration can be increased by providing the concave portion reinforcing wall portion 45 extending to the side wall concave portion 41b.
  • the recessed portion reinforcing wall 45 is recessed toward the axis CL of the second rotation shaft 51 and extends toward the side wall recessed portion 41b having a substantially arc shape. For this reason, the vibration input to the resistance portion 63 is transmitted to the side wall concave portion 41 b via the concave portion reinforcing wall portion 45. It is considered that the vibration transmitted to the side wall recess 41b is further transmitted in various directions. That is, it is considered that the load received from vibration can be more dispersed.
  • the reinforcing wall portions 45 and 46 include a general portion reinforcing wall portion 46 extending from the resistance portion 63 to the general surface portion 41a at an intermediate position between the adjacent recessed portion reinforcing wall portions 45 and 45.
  • a general portion reinforcing wall portion 46 By providing the general portion reinforcing wall portion 46, resistance to vibration can be further increased.
  • the general portion reinforcing wall portions 46 are located at an equal distance from the adjacent recessed portion reinforcing wall portions 45. For this reason, the load received from the input vibration can be more evenly distributed.
  • the eddy current type instrument 10 can be mounted not only on a two-wheeled vehicle but also on a vehicle such as a four-wheeled vehicle or a three-wheeled vehicle or other vehicles. Furthermore, although the eddy current type instrument has been described based on an example adopted in a vehicle speedometer, it can also be applied to a tachometer or the like. That is, the present invention is not limited to the examples as long as the operations and effects of the present invention are exhibited.
  • the eddy current type instrument of the present invention is suitable for a motorcycle.

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Abstract

The objective of the present invention is to provide an eddy current type instrument having high resistance to vibration despite having few components, on the premise that a resin cover member is used. An eddy current type instrument (10) includes: a first rotating shaft (31) supported rotatably by a base portion (21); a resin cover member (40) covering the base portion (21); a second rotating shaft (51) supported rotatably by the cover member (40); and a damper mechanism (60) provided above a rotor (53) to suppress over-rotation of the rotor (53). The cover member (40) includes a side wall portion (41) surrounding the sides of the rotor (53), and a top plate portion (42) covering an upper end of the side wall portion. The damper mechanism (60) includes a resistance portion (63) which is suspended from the top plate portion (42) and a distal end of which is immersed in oil (62). Reinforcing wall portions (45, 46) extending from the resistance portion (63) to the side wall portion (41) are formed integrally with the cover member (40) and the resistance portion (63).

Description

渦電流式計器Eddy current instrument
　本発明は、樹脂製のカバー部材を備えた渦電流式計器に関する。 The present invention relates to an eddy current type instrument provided with a resin cover member.
　二輪車等、多くの車両は、車速計やタコメータ等の計器を搭載している。これらの計器として、前輪の回転に連動させて磁石を回転させ、磁石の回転により発生した渦電流によって指針を回転させる、渦電流式の計器が知られている。渦電流式計器に関する従来技術として、特許文献１に開示される技術がある。 Many vehicles such as motorcycles are equipped with instruments such as a speedometer and a tachometer. As these instruments, an eddy current type instrument is known in which a magnet is rotated in conjunction with the rotation of a front wheel, and an indicator is rotated by an eddy current generated by the rotation of the magnet. As a conventional technique related to an eddy current type instrument, there is a technique disclosed in Patent Document 1.
　特許文献１に開示された渦電流式計器は、基部と、この基部に回転可能に支持された第１の回転軸と、この第１の回転軸に取り付けられ前記第１の回転軸と共に回転する磁性体と、前記基部に被せられた天板部と、この天板部に回転可能に支持された第２の回転軸と、この第２の回転軸に支持され前記磁性体が回転した際に発生する渦電流によって回転するロータと、このロータの上方に設けられ前記ロータの過回転を抑制するダンパ機構と、を有する。 An eddy current type instrument disclosed in Patent Document 1 includes a base, a first rotating shaft rotatably supported by the base, and the first rotating shaft attached to the first rotating shaft and rotating together with the first rotating shaft. When the magnetic body, the top plate portion covered by the base portion, the second rotation shaft rotatably supported by the top plate portion, and the magnetic body rotated by the second rotation shaft are rotated. A rotor that rotates due to the generated eddy current; and a damper mechanism that is provided above the rotor and suppresses overrotation of the rotor.
　ところで、特許文献１に示された渦電流式計器は、基部が略Ｕ字状に形成されている。渦電流式計器は、埃が舞い上がるような環境においても用いられることもあり、高い防塵性が求められる。 By the way, the base part of the eddy current type instrument shown in Patent Document 1 has a substantially U shape. Eddy current meters are sometimes used even in environments where dust rises, and high dust resistance is required.
特開２０００－１６２２２５号公報JP 2000-162225 A
　渦電流式計器の防塵性を高めるために、板状の基部にカバー部材を被せて、ロータ等を覆うことが考えられる。このとき、軽量化や形状の自由度の観点から、カバー部材の素材には樹脂を用いることが好ましい。加えて、部品点数を削減しつつも外部から受ける振動に対しては高い耐性を確保することが望まれる。 In order to enhance the dust resistance of the eddy current type instrument, it is conceivable to cover the rotor and the like by covering the plate-like base with a cover member. At this time, it is preferable to use a resin for the material of the cover member from the viewpoint of weight reduction and freedom of shape. In addition, it is desired to secure high resistance against vibrations received from the outside while reducing the number of parts.
　本発明は、樹脂製のカバー部材を用いることを前提に、少ない部品点数でありながら振動に対する耐性の高い渦電流式計器の提供を課題とする。 The present invention has an object to provide an eddy current type instrument having a high resistance to vibration while having a small number of parts on the assumption that a resin cover member is used.
　請求項１による発明によれば、基部と、この基部に回転可能に支持された第１の回転軸と、この第１の回転軸に取り付けられ前記第１の回転軸と共に回転する磁性体と、前記基部に被せられたカバー部材と、このカバー部材に回転可能に支持された第２の回転軸と、この第２の回転軸に支持され前記磁性体が回転した際に発生する渦電流によって回転するロータと、このロータの上方に設けられ前記ロータの過回転を抑制するダンパ機構と、を有する渦電流式計器において、
　前記カバー部材は、素材に樹脂が用いられていると共に、前記ロータの側方を囲う側壁部と、この側壁部の上端を覆っている天板部と、を有し、
　前記ダンパ機構は、前記第２の回転軸上に設けられたカップ状のカップ部と、このカップ部に充填されたオイルと、前記天板部から下げられ先端が前記オイルに浸かっている抵抗部と、を有し、
　前記抵抗部から前記側壁部まで延びる補強壁部は、前記カバー部材、及び、前記抵抗部に一体的に形成されていることを特徴とする渦電流式計器が提供される。 According to the invention of claim 1, a base, a first rotary shaft rotatably supported by the base, a magnetic body attached to the first rotary shaft and rotating together with the first rotary shaft, Rotating by a cover member covered by the base, a second rotating shaft rotatably supported by the cover member, and an eddy current generated when the magnetic body rotates by being supported by the second rotating shaft An eddy-current meter having a rotor and a damper mechanism provided above the rotor to suppress overrotation of the rotor,
The cover member is made of resin as a material, and has a side wall portion that surrounds the side of the rotor, and a top plate portion that covers the upper end of the side wall portion,
The damper mechanism includes a cup-shaped cup portion provided on the second rotating shaft, oil filled in the cup portion, and a resistance portion that is lowered from the top plate portion and has a tip immersed in the oil. And having
An eddy current meter is provided in which a reinforcing wall portion extending from the resistance portion to the side wall portion is formed integrally with the cover member and the resistance portion.
　請求項２に記載のごとく、好ましくは、前記側壁部は、一般面部から前記第２の回転軸の軸線に向かって凹み、前記カバー部材の底面視において略円弧形状を呈する側壁凹部を含み、
　前記補強壁部は、前記抵抗部から前記側壁凹部まで延びる凹部補強壁部を含む。 As described in claim 2, preferably, the side wall portion includes a side wall concave portion that is recessed from the general surface portion toward the axis of the second rotation shaft and has a substantially arc shape in the bottom view of the cover member,
The reinforcing wall portion includes a recessed portion reinforcing wall portion extending from the resistance portion to the side wall recessed portion.
　請求項３に記載のごとく、好ましくは、前記側壁凹部、及び、前記凹部補強壁部は、共に複数箇所に形成され、
　前記補強壁部は、隣り合う前記凹部補強壁部の中間位置において、前記抵抗部から前記一般面部まで延びる一般部補強壁部を含む。 As described in claim 3, preferably, the side wall recess and the recess reinforcement wall are both formed at a plurality of locations,
The reinforcing wall portion includes a general portion reinforcing wall portion extending from the resistance portion to the general surface portion at an intermediate position between the adjacent recessed portion reinforcing wall portions.
　請求項１に係る発明では、抵抗部から側壁部まで延びる補強壁部は、カバー部材、及び、抵抗部に一体的に形成されている。抵抗部に振動等の負荷が加わることがある。この振動は、補強壁部を介して側壁部に伝達される。より広い範囲に負荷を分散させることにより、負荷が一部に集中することを抑制する。これにより、振動に対する耐性を高めることができる。このとき、抵抗部、補強壁部、側壁部は、一部材により一体的に形成されている。このため、これらを別々に設けた場合に比べて部品点数の削減を図ることもできる。樹脂製のカバー部材を用いることを前提に、少ない部品点数でありながら振動に対する耐性の高い渦電流式計器を提供することができる。 In the invention according to claim 1, the reinforcing wall portion extending from the resistance portion to the side wall portion is formed integrally with the cover member and the resistance portion. A load such as vibration may be applied to the resistance portion. This vibration is transmitted to the side wall portion through the reinforcing wall portion. By distributing the load over a wider range, the load is prevented from being concentrated in part. Thereby, the tolerance with respect to a vibration can be improved. At this time, the resistance portion, the reinforcing wall portion, and the side wall portion are integrally formed by one member. For this reason, the number of parts can be reduced as compared with the case where these are provided separately. On the premise of using a resin cover member, it is possible to provide an eddy current type instrument having a high resistance to vibration while having a small number of parts.
　請求項２に係る発明では、補強壁部は、抵抗部から側壁凹部まで延びる凹部補強壁部を含む。本発明者らは、側壁凹部まで延びる凹部補強壁部を設けることにより、振動に対する耐性を高めることができることを知見した。凹部補強壁部は、第２の回転軸の軸線に向かって凹むとともに、略円弧形状を呈する側壁凹部に向かって延びる。このため、抵抗部に入力された振動は、凹部補強壁部を介して側壁凹部に伝達される。側壁凹部に伝達された振動は、さらにさまざまな方向に向かって伝達されるものと考えられる。つまり、より振動から受ける負荷を分散することができるものと考えられる。 In the invention according to claim 2, the reinforcing wall portion includes a recessed portion reinforcing wall portion extending from the resistance portion to the side wall recessed portion. The inventors of the present invention have found that resistance to vibration can be increased by providing a recessed portion reinforcing wall portion extending to the recessed portion on the side wall. The recessed portion reinforcing wall portion is recessed toward the axis of the second rotating shaft and extends toward the sidewall recessed portion having a substantially arc shape. For this reason, the vibration input to the resistance portion is transmitted to the side wall concave portion via the concave portion reinforcing wall portion. It is considered that the vibration transmitted to the side wall recess is further transmitted in various directions. That is, it is considered that the load received from vibration can be more dispersed.
　請求項３に係る発明では、補強壁部は、隣り合う凹部補強壁部の中間位置において、抵抗部から一般面部まで延びる一般部補強壁部を含む。一般部補強壁部を設けることにより、より振動に対する耐性を高めることができる。このとき、一般部補強壁部は、それぞれ隣り合う凹部補強壁部に対して等距離に位置する。このため、入力された振動から受ける負荷をより均等に分散することができる。 In the invention according to claim 3, the reinforcing wall portion includes a general portion reinforcing wall portion extending from the resistance portion to the general surface portion at an intermediate position between the adjacent recessed portion reinforcing wall portions. By providing the general portion reinforcing wall portion, resistance to vibration can be further increased. At this time, the general portion reinforcing wall portions are located at equal distances from the adjacent recessed portion reinforcing wall portions. For this reason, the load received from the input vibration can be more evenly distributed.
本発明の実施例による渦電流式計器の平面図である。It is a top view of the eddy current type instrument by the Example of this invention. 図１の２－２線断面図である。FIG. 2 is a sectional view taken along line 2-2 of FIG. 図２に示されたカバー部材の底面図である。FIG. 3 is a bottom view of the cover member shown in FIG. 2. 図３に示されたカバー部材の作用を説明する図である。It is a figure explaining the effect | action of the cover member shown by FIG.
　本発明の実施の形態を添付図に基づいて以下に説明する。なお、説明中、左右とは車両の乗員を基準として左右、前後とは車両の進行方向を基準として前後を指す。また、図中Ｆｒは前、Ｒｒは後、Ｌｅは乗員から見て左、Ｒｉは乗員から見て右、Ｕｐは上、Ｄｎは下を示している。
＜実施例＞ Embodiments of the present invention will be described below with reference to the accompanying drawings. In the description, left and right refer to the left and right based on the vehicle occupant, and front and rear refer to the front and rear based on the traveling direction of the vehicle. In the figure, Fr indicates the front, Rr indicates the rear, Le indicates the left when viewed from the occupant, Ri indicates the right when viewed from the occupant, Up indicates the upper side, and Dn indicates the lower side.
<Example>
　図１を参照する。図１には、本発明による渦電流式計器１０が、上方から見た状態において示されている。この渦電流式計器１０は、例えば、二輪車に搭載されて、車速計として用いられる。 Refer to FIG. FIG. 1 shows an eddy current instrument 10 according to the present invention as viewed from above. This eddy current type instrument 10 is mounted on a two-wheeled vehicle, for example, and used as a vehicle speedometer.
　渦電流式計器１０は、平面視において略扇形形状を呈するケース１１と、このケース１１の内部に設けられた計器本体２０と、この計器本体２０の上方に設けられた文字板１３と、計器本体２０に取り付けられた指針１４と、を有する。指針１４は、二輪車の車速に応じて、文字板１３に表示された目盛り１５を指し示す。これにより、乗員は、車速を視認できる。 The eddy current meter 10 includes a case 11 having a substantially fan shape in plan view, a meter body 20 provided in the case 11, a dial 13 provided above the meter body 20, and a meter body. And a pointer 14 attached to 20. The pointer 14 indicates the scale 15 displayed on the dial 13 according to the speed of the motorcycle. Thereby, the passenger | crew can visually recognize a vehicle speed.
　図２を参照する。計器本体２０は、基部２１と、この基部２１に設けられた軸受体２２と、この軸受体２２に回転可能に支持された第１の回転体３０と、基部２１に被せられたカバー部材４０と、このカバー部材４０に回転可能に支持された第２の回転体５０と、この第２の回転体５０の急激な回転を抑制するためのダンパ機構６０と、第２の回転体５０の回転方向とは逆の方向に第２の回転体５０を付勢する渦巻きばね２７と、からなる。 Refer to FIG. The meter body 20 includes a base 21, a bearing body 22 provided on the base 21, a first rotating body 30 rotatably supported by the bearing body 22, and a cover member 40 covered on the base 21. The second rotating body 50 rotatably supported by the cover member 40, the damper mechanism 60 for suppressing the sudden rotation of the second rotating body 50, and the rotation direction of the second rotating body 50 And a spiral spring 27 that urges the second rotating body 50 in the opposite direction.
　基部２１は、例えば、一般的な冷間圧延鋼板（SPCC）がプレス成形されることにより構成される。基部２１の中央には、差込穴２１ａが形成されている。 The base 21 is configured, for example, by press forming a general cold rolled steel plate (SPCC). An insertion hole 21 a is formed in the center of the base 21.
　軸受体２２は、差込穴２１ａに差し込まれた金属製の筒状部材２２ａと、この筒状部材２２ａの内周に設けられた焼結金属製の滑り軸受２２ｂと、からなる。ケース１１の底部１１ａには、底穴１１ｃが形成されている。この底穴１１ｃに軸受体２２が差し込まれつつ、基部２１がケース１１の底部１１ａに当接することにより、計器本体２０は、ケース１１に配置される。 The bearing body 22 includes a metal cylindrical member 22a inserted into the insertion hole 21a, and a sintered metal sliding bearing 22b provided on the inner periphery of the cylindrical member 22a. A bottom hole 11 c is formed in the bottom 11 a of the case 11. While the bearing body 22 is inserted into the bottom hole 11 c, the base 21 comes into contact with the bottom 11 a of the case 11, whereby the instrument body 20 is disposed in the case 11.
　第１の回転体３０は、滑り軸受２２ｂの内周に回転可能に支持されている第１の回転軸３１と、この第１の回転軸３１の上部に固定されているカップ状の導磁体３２と、この導磁体３２の上方で第１の回転軸３１に固定される円盤状の磁性体３３と、からなる。即ち、導磁体３２及び磁性体３３は、第１の回転軸３１と共に回転可能である。 The first rotating body 30 includes a first rotating shaft 31 that is rotatably supported on the inner periphery of the sliding bearing 22b, and a cup-shaped magnetic guiding body 32 that is fixed to the upper portion of the first rotating shaft 31. And a disk-shaped magnetic body 33 fixed to the first rotating shaft 31 above the magnetic conductor 32. That is, the magnetic conductor 32 and the magnetic body 33 can rotate together with the first rotating shaft 31.
　第１の回転軸３１の上端は、下方に向かって抉られており、この抉られた部位には、軸受３４が配置されている。 The upper end of the first rotating shaft 31 is rolled downward, and a bearing 34 is disposed at the rolled portion.
　カバー部材４０は、例えば、射出成形による射出成形品であり、基部２１の縁から立ち上げられた側壁部４１と、この側壁部４１の上端を覆う天板部４２と、積算計１７を収容する収容部４３と、を有している。カバー部材４０は、素材にポリブチレンテレフタレート樹脂（PBT）を採用することができる。 The cover member 40 is, for example, an injection-molded product by injection molding, and houses the side wall portion 41 raised from the edge of the base portion 21, the top plate portion 42 covering the upper end of the side wall portion 41, and the accumulator 17. And an accommodating portion 43. The cover member 40 can employ polybutylene terephthalate resin (PBT) as a material.
　なお、積算計１７は、車両の走行距離を示している。積算計１７の構造については、周知の構造が採用されている。このため、詳細な説明は省略する。 Note that the totalizer 17 indicates the travel distance of the vehicle. A known structure is adopted for the structure of the accumulator 17. For this reason, detailed description is omitted.
　図３を参照する。側壁部４１の一般面部４１ａから第２の回転軸５１の軸線ＣＬに向かって凹み、カバー部材４０の底面視において略円弧形状を呈する部分を側壁凹部４１ｂという。 Refer to FIG. A portion that is recessed from the general surface portion 41a of the side wall portion 41 toward the axis line CL of the second rotation shaft 51 and that has a substantially arc shape in the bottom view of the cover member 40 is referred to as a side wall recess portion 41b.
　ダンパ機構６０の抵抗部６３から２つの側壁凹部４１ｂ、４１ｂまで、それぞれ凹部補強壁部４５、４５が延びている。凹部補強壁部４５は、抵抗部６３から側壁凹部４１ｂの略中央の位置まで延びている。抵抗部６３については、詳細を後述する。 The recessed portion reinforcing wall portions 45 and 45 extend from the resistance portion 63 of the damper mechanism 60 to the two side wall recessed portions 41b and 41b, respectively. The recessed portion reinforcing wall portion 45 extends from the resistance portion 63 to a substantially central position of the side wall recessed portion 41b. Details of the resistor 63 will be described later.
　２つの凹部補強壁部４５、４５の中間位置において、抵抗部６３から一般面部まで一般部補強壁部４６が延びている。 The general portion reinforcing wall portion 46 extends from the resistance portion 63 to the general surface portion at an intermediate position between the two concave portion reinforcing wall portions 45 and 45.
　なお、単に「補強壁部」といった場合には、凹部補強壁部４５、及び、一般部補強壁部４６の両方を含む。 It should be noted that the term “reinforcing wall portion” includes both the recessed portion reinforcing wall portion 45 and the general portion reinforcing wall portion 46.
　天板部４２には、第１の回転軸３１の軸線ＣＬ上に、円状の支持穴４２ａが開けられている。即ち、以下に説明する第２の回転体５０は、第１の回転軸３１と同一の軸線ＣＬ上に配置されている。 A circular support hole 42 a is formed in the top plate portion 42 on the axis line CL of the first rotation shaft 31. That is, the second rotating body 50 described below is disposed on the same axis CL as the first rotating shaft 31.
　図２を参照する。第２の回転体５０は、支持穴４２ａ及び軸受３４によって回転可能に支持される第２の回転軸５１と、この第２の回転軸５１に固定されるロータ支持部５２と、このロータ支持部５２に固定されるロータ５３と、からなる。ロータ支持部５２は、インサート成形により樹脂で成形される。ロータ５３は、非磁性金属、例えば、アルミニウムからなり、プレス成形によりカップ状に構成される。 Refer to FIG. The second rotating body 50 includes a second rotating shaft 51 rotatably supported by the support hole 42a and the bearing 34, a rotor supporting portion 52 fixed to the second rotating shaft 51, and the rotor supporting portion. And a rotor 53 fixed to 52. The rotor support portion 52 is formed of resin by insert molding. The rotor 53 is made of a nonmagnetic metal, for example, aluminum, and is configured in a cup shape by press molding.
　ダンパ機構６０は、ロータ支持部５２の上面に形成されたカップ状のカップ部６１と、このカップ部６１に充填されたオイル６２と、天板部４２から下方に延び先端がオイル６２に浸かった抵抗部６３と、からなる。第２の回転軸５１が回転すると、カップ部６１も回転する。オイル６２に浸かった抵抗部６３は、ロータ５３の回転の抵抗となり、ロータ５３の振動および過回転を抑制できる。 The damper mechanism 60 includes a cup-shaped cup portion 61 formed on the upper surface of the rotor support portion 52, an oil 62 filled in the cup portion 61, and extends downward from the top plate portion 42, and the tip is immersed in the oil 62. And a resistance portion 63. When the second rotating shaft 51 rotates, the cup portion 61 also rotates. The resistance portion 63 immersed in the oil 62 serves as a rotation resistance of the rotor 53 and can suppress vibration and over-rotation of the rotor 53.
　渦巻きばね２７は、カバー部材４０の直上に配置されている。渦巻きばね２７の中心部２７ａは、第２の回転軸５１に圧入して固定されている。渦巻きばね２７の端部２７ｂは、天板部４２に一体的に形成された固定部４８に固定されている。固定部４８は、ヒータで加熱された熱板が押し当てられると変形し、渦巻きばね２７の端部２７ｂは固定される。 The spiral spring 27 is disposed immediately above the cover member 40. A central portion 27 a of the spiral spring 27 is press-fitted and fixed to the second rotating shaft 51. An end portion 27 b of the spiral spring 27 is fixed to a fixing portion 48 formed integrally with the top plate portion 42. The fixing portion 48 is deformed when a hot plate heated by a heater is pressed against it, and the end portion 27b of the spiral spring 27 is fixed.
　導磁体３２の下方には、第１の回転軸３１と噛みあう横軸１８が設けられている。横軸１８は、基部２１に回転可能に支持されている。横軸１８は、第１の回転軸３１と直交しており、第１の回転軸３１の回転を積算計１７に伝える。 A horizontal shaft 18 that meshes with the first rotating shaft 31 is provided below the magnetic conductor 32. The horizontal shaft 18 is rotatably supported by the base portion 21. The horizontal axis 18 is orthogonal to the first rotation axis 31 and transmits the rotation of the first rotation axis 31 to the accumulator 17.
　次に、本発明の効果について説明する。 Next, the effect of the present invention will be described.
　図４（ａ）を参照する。図４（ａ）には、比較例による渦電流式計器１１０のカバー部材１４０が示されている。エンジン等において発生した振動は、車両の広い範囲に伝達される。振動の一部は、渦電流式計器１１０のカバー部材１４０にも伝達される。抵抗部１６３は、カバー部材１４０の天板部１４２に対して一体的に形成された筒状の部材である。このため、抵抗部１６３の付け根の部分には、振動が伝達されることにより大きな負荷が加わることがある。この場合、抵抗部１６３の付け根の部分にある支持穴が大きく振動することによって第２の回転軸に回転トルクが生じ、指針が本来の位置からずれる可能性がある。 Refer to FIG. FIG. 4A shows a cover member 140 of an eddy current type instrument 110 according to a comparative example. Vibration generated in the engine or the like is transmitted to a wide range of the vehicle. Part of the vibration is also transmitted to the cover member 140 of the eddy current instrument 110. The resistance portion 163 is a cylindrical member formed integrally with the top plate portion 142 of the cover member 140. For this reason, a large load may be applied to the base portion of the resistance portion 163 due to the transmission of vibration. In this case, the support hole at the base portion of the resistance portion 163 vibrates greatly, so that rotational torque is generated on the second rotation shaft, and the pointer may be displaced from the original position.
　図４（ｂ）を参照する。図４（ｂ）には、実施例による渦電流式計器１０のカバー部材４０が示されている。抵抗部６３から側壁部４１まで延びる補強壁部４５、４６は、カバー部材４０、及び、抵抗部６３に一体的に形成されている。抵抗部６３に振動等の負荷が加わることがある。矢印（１）～（５）によって示すように、振動は、補強壁部４５、４６を介して側壁部４１に伝達される。より広い範囲に負荷を分散させることにより、負荷が一部に集中することを抑制する。これにより、振動に対する耐性を高めることができる。このとき、抵抗部６３、補強壁部４５、４６、側壁部４１は、一部材により一体的に形成されている。このため、これらを別々に設けた場合に比べて部品点数の削減を図ることもできる。樹脂製のカバー部材４０を用いることを前提に、少ない部品点数でありながら振動に対する耐性の高い渦電流式計器１０を提供することができる。 Refer to FIG. 4 (b). FIG. 4B shows a cover member 40 of the eddy current type instrument 10 according to the embodiment. Reinforcing wall portions 45 and 46 extending from the resistance portion 63 to the side wall portion 41 are formed integrally with the cover member 40 and the resistance portion 63. A load such as vibration may be applied to the resistance portion 63. As indicated by the arrows (1) to (5), the vibration is transmitted to the side wall portion 41 via the reinforcing wall portions 45 and 46. By distributing the load over a wider range, the load is prevented from being concentrated in part. Thereby, the tolerance with respect to a vibration can be improved. At this time, the resistance part 63, the reinforcement wall parts 45 and 46, and the side wall part 41 are integrally formed by one member. For this reason, the number of parts can be reduced as compared with the case where these are provided separately. On the assumption that the resin cover member 40 is used, it is possible to provide the eddy current type instrument 10 having a high resistance to vibration while having a small number of parts.
　さらに、補強壁部４５、４６は、抵抗部６３から側壁凹部４１ｂまで延びる凹部補強壁部４５を含む。本発明者らは、側壁凹部４１ｂまで延びる凹部補強壁部４５を設けることにより、振動に対する耐性を高めることができることを知見した。凹部補強壁部４５は、第２の回転軸５１の軸線ＣＬに向かって凹むとともに、略円弧形状を呈する側壁凹部４１ｂに向かって延びる。このため、抵抗部６３に入力された振動は、凹部補強壁部４５を介して側壁凹部４１ｂに伝達される。側壁凹部４１ｂに伝達された振動は、さらにさまざまな方向に向かって伝達されるものと考えられる。つまり、より振動から受ける負荷を分散することができるものと考えられる。 Furthermore, the reinforcing wall portions 45 and 46 include a concave portion reinforcing wall portion 45 extending from the resistance portion 63 to the side wall concave portion 41b. The present inventors have found that the resistance to vibration can be increased by providing the concave portion reinforcing wall portion 45 extending to the side wall concave portion 41b. The recessed portion reinforcing wall 45 is recessed toward the axis CL of the second rotation shaft 51 and extends toward the side wall recessed portion 41b having a substantially arc shape. For this reason, the vibration input to the resistance portion 63 is transmitted to the side wall concave portion 41 b via the concave portion reinforcing wall portion 45. It is considered that the vibration transmitted to the side wall recess 41b is further transmitted in various directions. That is, it is considered that the load received from vibration can be more dispersed.
　さらに、補強壁部４５、４６は、隣り合う凹部補強壁部４５、４５の中間位置において、抵抗部６３から一般面部４１ａまで延びる一般部補強壁部４６を含む。一般部補強壁部４６を設けることにより、より振動に対する耐性を高めることができる。このとき、一般部補強壁部４６は、それぞれ隣り合う凹部補強壁部４５に対して等距離に位置する。このため、入力された振動から受ける負荷をより均等に分散することができる。 Furthermore, the reinforcing wall portions 45 and 46 include a general portion reinforcing wall portion 46 extending from the resistance portion 63 to the general surface portion 41a at an intermediate position between the adjacent recessed portion reinforcing wall portions 45 and 45. By providing the general portion reinforcing wall portion 46, resistance to vibration can be further increased. At this time, the general portion reinforcing wall portions 46 are located at an equal distance from the adjacent recessed portion reinforcing wall portions 45. For this reason, the load received from the input vibration can be more evenly distributed.
　尚、本発明による渦電流式計器１０は、二輪車の他、四輪車や三輪車等の車両や他の乗り物にも搭載することができる。さらに、渦電流式計器は、車速計に採用した例を基に説明したが、タコメータ等であっても適用可能である。即ち、本発明の作用及び効果を奏する限りにおいて、本発明は、実施例に限定されるものではない。 The eddy current type instrument 10 according to the present invention can be mounted not only on a two-wheeled vehicle but also on a vehicle such as a four-wheeled vehicle or a three-wheeled vehicle or other vehicles. Furthermore, although the eddy current type instrument has been described based on an example adopted in a vehicle speedometer, it can also be applied to a tachometer or the like. That is, the present invention is not limited to the examples as long as the operations and effects of the present invention are exhibited.
　本発明の渦電流式計器は、二輪車に好適である。 The eddy current type instrument of the present invention is suitable for a motorcycle.
１０…渦電流式計器
２１…基部
３１…第１の回転軸
３３…磁性体
４０…カバー部材
４１ａ…一般面部
４１ｂ…側壁凹部
４５…凹部補強壁部
４６…一般部補強壁部
５１…第２の回転軸
５３…ロータ
６０…ダンパ機構
６１…カップ部
６２…オイル
６３…抵抗部 DESCRIPTION OF SYMBOLS 10 ... Eddy current type instrument 21 ... Base 31 ... 1st rotating shaft 33 ... Magnetic body 40 ... Cover member 41a ... General surface part 41b ... Side wall recessed part 45 ... Reinforcement reinforcement wall part 46 ... General part reinforcement wall part 51 ... 2nd Rotating shaft 53 ... Rotor 60 ... Damper mechanism 61 ... Cup part 62 ... Oil 63 ... Resistance part

Claims (3)

  1. 　基部と、この基部に回転可能に支持された第１の回転軸と、この第１の回転軸に取り付けられ前記第１の回転軸と共に回転する磁性体と、前記基部に被せられたカバー部材と、このカバー部材に回転可能に支持された第２の回転軸と、この第２の回転軸に支持され前記磁性体が回転した際に発生する渦電流によって回転するロータと、このロータの上方に設けられ前記ロータの過回転を抑制するダンパ機構と、を有する渦電流式計器において、
    　前記カバー部材は、素材に樹脂が用いられていると共に、前記ロータの側方を囲う側壁部と、この側壁部の上端を覆っている天板部と、を有し、
    　前記ダンパ機構は、前記第２の回転軸上に設けられたカップ状のカップ部と、このカップ部に充填されたオイルと、前記天板部から下げられ先端が前記オイルに浸かっている抵抗部と、を有し、
    　前記抵抗部から前記側壁部まで延びる補強壁部は、前記カバー部材、及び、前記抵抗部に一体的に形成されていることを特徴とする渦電流式計器。     A base, a first rotary shaft rotatably supported by the base, a magnetic body attached to the first rotary shaft and rotating together with the first rotary shaft, and a cover member covering the base A second rotating shaft rotatably supported by the cover member, a rotor supported by the second rotating shaft and rotated by an eddy current generated when the magnetic body rotates, and above the rotor An eddy current type instrument having a damper mechanism provided to suppress over-rotation of the rotor,
    The cover member is made of resin as a material, and has a side wall portion that surrounds the side of the rotor, and a top plate portion that covers the upper end of the side wall portion,
    The damper mechanism includes a cup-shaped cup portion provided on the second rotating shaft, oil filled in the cup portion, and a resistance portion that is lowered from the top plate portion and has a tip immersed in the oil. And having
    An eddy current instrument, wherein a reinforcing wall portion extending from the resistance portion to the side wall portion is formed integrally with the cover member and the resistance portion.
  2. 　前記側壁部は、一般面部から前記第２の回転軸の軸線に向かって凹み、前記カバー部材の底面視において略円弧形状を呈する側壁凹部を含み、
    　前記補強壁部は、前記抵抗部から前記側壁凹部まで延びる凹部補強壁部を含むことを特徴とする請求項１に記載の渦電流式計器。     The side wall portion includes a side wall concave portion that is recessed from a general surface portion toward the axis of the second rotation shaft, and has a substantially arc shape in a bottom view of the cover member,
    The eddy current instrument according to claim 1, wherein the reinforcing wall portion includes a recessed portion reinforcing wall portion extending from the resistance portion to the side wall recessed portion.
  3. 　前記側壁凹部、及び、前記凹部補強壁部は、共に複数箇所に形成され、
    　前記補強壁部は、隣り合う前記凹部補強壁部の中間位置において、前記抵抗部から前記一般面部まで延びる一般部補強壁部を含むことを特徴とする請求項２に記載の渦電流式計器。     The sidewall recess and the recess reinforcing wall are both formed at a plurality of locations,
    3. The eddy current meter according to claim 2, wherein the reinforcing wall portion includes a general portion reinforcing wall portion extending from the resistance portion to the general surface portion at an intermediate position between the adjacent recessed portion reinforcing wall portions.
PCT/JP2018/000949 2017-01-20 2018-01-16 Eddy current type instrument WO2018135463A1 (en)

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