WO2017110521A1 - Instrument de type à courants de foucault - Google Patents

Instrument de type à courants de foucault Download PDF

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Publication number
WO2017110521A1
WO2017110521A1 PCT/JP2016/086708 JP2016086708W WO2017110521A1 WO 2017110521 A1 WO2017110521 A1 WO 2017110521A1 JP 2016086708 W JP2016086708 W JP 2016086708W WO 2017110521 A1 WO2017110521 A1 WO 2017110521A1
Authority
WO
WIPO (PCT)
Prior art keywords
accumulator
eddy current
character wheel
instrument
shaft
Prior art date
Application number
PCT/JP2016/086708
Other languages
English (en)
Japanese (ja)
Inventor
健志 笛吹
田中　智幸
岩橋　優
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 JP2017557874A priority Critical patent/JP6747454B2/ja
Priority to CN201680075621.3A priority patent/CN108474675B/zh
Publication of WO2017110521A1 publication Critical patent/WO2017110521A1/fr

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Classifications

    • 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
    • G01D7/00—Indicating measured values
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06M—COUNTING MECHANISMS; COUNTING OF OBJECTS NOT OTHERWISE PROVIDED FOR
    • G06M1/00—Design features of general application
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06M—COUNTING MECHANISMS; COUNTING OF OBJECTS NOT OTHERWISE PROVIDED FOR
    • G06M3/00—Counters with additional facilities
    • G06M3/12—Counters with additional facilities for preventing incorrect actuation, e.g. for preventing falsification
    • 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, and is suitable, for example, as an eddy current type instrument equipped with an integrating meter that displays the total travel distance and section distance of a vehicle.
  • Vehicles are usually equipped with instruments such as speedometers and tachometers.
  • instruments such as speedometers and tachometers.
  • an eddy current type instrument in which a pointer is rotated by an eddy current generated when a magnet is rotated.
  • Patent Document 1 As a conventional technique related to an eddy current type instrument, there is a technique disclosed in Patent Document 1.
  • an eddy current type instrument has a base, a lid placed on the base, a first rotary shaft rotatably supported on the base, and the first rotary shaft.
  • a magnet that is attached and rotates together with the first rotation shaft, a second rotation shaft that is rotatably attached to the lid, and rotation by an eddy current that is generated when the magnet is supported by the second rotation shaft.
  • a damper mechanism for suppressing rapid rotation of the second rotating shaft and the rotor. The pointer visually recognized by the occupant is provided at the upper end of the second rotation shaft.
  • an integrating meter composed of a plurality of character wheels for displaying the total travel distance and section distance applied to these instruments is attached by being crimped to a metal frame.
  • Patent Document 2 Has been.
  • the integrator of the eddy current type instrument disclosed in Patent Documents 1 and 2 is exposed around the character wheel. Display the accumulator using a tool inserted from the exposed area around the accumulator to disengage the gears on the dial wheel that controls the carry of the dial wheel and change the display value of the accumulator. There was a risk that the value would be altered.
  • the present invention has been made in view of the above problems, and an object of the present invention is to provide an eddy current type instrument having an accumulator that is difficult to disengage a gear provided on a character wheel.
  • the eddy current measuring instrument 10 includes a rotating body 23, an accumulator 12 that displays the travel distance by rotating the character wheel 12a based on the rotation of the rotating body 23, the rotating body 23, and the character wheel 12a.
  • An eddy current type instrument having a casing 40 that pivotally supports the casing 40.
  • the casing 40 is made of a thermoplastic synthetic resin material and is provided in the casing 40.
  • a housing portion 43 for housing is provided, and a gear 12b that controls the carry of the character wheel 12a is provided between the opposing surface of the housing portion 43 and the rotary shaft 17 of the character wheel 12a.
  • the gear 12b is provided on the side 12e opposite to the display surface 12d of the accumulator 12 of the character wheel 12a.
  • a pointer instrument S that drives the pointer 11 based on the rotation of the rotating body 23 is provided, and the accommodating portion 43 includes wall portions 43a and 43b between the accumulator 12 and the pointer instrument S, and the digit of the character wheel 12a.
  • the gear 12b that controls the rising is provided between the wall portions 43a and 43b and the rotating shaft 17.
  • the gear 12b is provided on the surface 12f side which is rotated 90 degrees around the rotation shaft 17 toward the housing portion with respect to the display surface 12d of the accumulator 12 of the character wheel 12a.
  • FIG. 1 It is a side view of an eddy current type instrument showing one embodiment of the present invention. It is sectional drawing of the state which looked at the eddy current type instrument shown by FIG. 1 from the left side. It is a principal part enlarged view of the eddy current type meter shown by FIG. It is the figure of the state which looked at the eddy current type instrument shown by FIG. (A) Enlarged view of the main part immediately after placing the accumulator around the protrusion shown in FIG. 4, (b) Enlarged view of the main part after fixing the accumulator, (c) After fixing the accumulator (with the protrusion It is a principal part enlarged view of the case of welding.
  • left and right refer to the left and right with reference to the occupant who has boarded the motorcycle
  • front and rear refer to the front and rear with reference to the traveling direction of the motorcycle.
  • 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 instrument body (eddy current instrument) 10 of an eddy current instrument according to the present invention as viewed from the left side.
  • a pointer 11 and a cover are attached to the instrument main body 10.
  • the instrument 11 is mounted on a two-wheeled vehicle and used as a vehicle speedometer (pointer instrument) S having the pointer 11.
  • an accumulator 12 for displaying the accumulated travel distance is provided in front of a rotation shaft (second rotation shaft) 45 to which the pointer 11 is attached.
  • the pointer 11 and the accumulator 12 operate in conjunction with the rotation of the front wheel of the motorcycle.
  • the details of the meter body 10 will be described.
  • the meter body 10 includes the vehicle speedometer S, the accumulator 12, the bearing body 20, the base 30 into which the bearing body 20 is inserted, the lid (housing) 40 that covers the base 30, and these. And parts provided on the base 30 and the lid 40.
  • the accumulator 12 is inserted through a shaft (rotating shaft) 17 and rotates a plurality of character wheels 12a on which numerical values are printed via a gear according to rotation of a first rotating shaft (rotating body) 23 described later.
  • a pinion holder 12c is provided between the plurality of character wheels 12a, and a pinion gear (gear) 12b is rotatably provided on the pinion holder 12c.
  • a mechanism for controlling carry is provided, and among the adjacent character wheels 12a, when the character wheel 12a corresponding to the lower digit rotates once (added by 1 as a numerical value and becomes 9 to 0), the pinion holder The numerical value of the character wheel 12a corresponding to the upper digit is added by 1 by the pinion gear 12b provided in 12c.
  • the structure of the character wheel 12a, the pinion gear 12b, and the pinion holder 12c is common to each digit.
  • the bearing body 20 includes a cylindrical member 21 and a sintered bearing 22 made of sintered metal provided on the inner periphery of the cylindrical member 21.
  • a first rotary shaft 23 is rotatably provided on the inner periphery of the slide bearing 22.
  • the base 30 is, for example, a base plate configured by press forming a general cold rolled steel plate (SPCC).
  • An insertion hole 31 is formed in the center of the base 30.
  • a ring member 32 is provided on the periphery of the cylindrical member 21. The cylindrical member 21 and the base 30 are fixed by crimping the ring member 32 after inserting the ring member 32 into the insertion hole 31.
  • the tubular member 21 and the ring member 32 can be integrated to reduce the number of parts.
  • a cup-shaped magnetic conductor 24 and a donut-shaped magnet 25 are fixed to the upper part of the first rotating shaft 23. That is, the magnetic conductor 24 and the magnet 25 can rotate together with the first rotating shaft 23.
  • the magnetic conductor 24 opens upward.
  • the magnet 25 is disposed so as to be accommodated in the magnetic conductor 24 opened upward.
  • a radially magnetized sintered magnet made of Al-Ni-Co is used as the magnet 25, for example.
  • the upper end of the first rotating shaft 23 is beaten downward, and a second bearing 26 is disposed at the beaten portion.
  • a horizontal shaft 15 that meshes with the first rotating shaft 23 is provided below the magnetic conductor 24.
  • the horizontal shaft 15 is rotatably supported by the base 30 (see FIG. 1).
  • the horizontal axis 15 is orthogonal to the first rotation axis 23 and constitutes a part of the gear mechanism 16 that transmits the rotation of the first rotation axis 23 to the accumulator 12.
  • the gear mechanism 16 employs a known technique such as a worm gear. Detailed description is omitted.
  • the lid 40 is, for example, an injection-molded product by injection molding, and includes a second wall portion 41 that extends upward from the end portion of the base portion 30 and a ceiling portion 42 that covers an upper portion surrounded by the second wall portion 41. And consist of The lid 40 can employ polybutylene terephthalate resin (PBT).
  • the ceiling portion 42 is formed with a housing portion 43 for housing the accumulator 12 from substantially the center to the front portion.
  • the housing portion 43 is provided with a bottom surface portion (wall portion) 43a and a back surface portion (wall portion) 43b between the vehicle speed meter S and the shaft 17.
  • the pinion gear 12b provided in the pinion holder 12c is provided between the shaft 12 and the surface 12e opposite to the display surface 12d of the accumulator 12, that is, the surface 12e facing the bottom surface portion 43a. Since the pinion gear 12b is covered with the bottom surface portion 43a and the back surface portion 43b, even if a tool is inserted from the exposed portion around the accumulator 12 that is not covered with the bottom surface portion 43a and the back surface portion 43b, the pinion gear 12b is linear. Cannot be touched and it is difficult to remove the pinion gear 12b.
  • a circular support hole 44 is formed on the axis CL of the first rotation shaft 23 at the approximate center of the ceiling portion 42. That is, the second rotation shaft 45 is disposed on the same axis line CL as the first rotation shaft 23.
  • the second rotation shaft 45 is rotatably supported by the lid body 40 in a state in which the second rotation shaft 45 is in contact with the inner peripheral surface of the support hole 44.
  • the lower end of the second rotating shaft 45 is rotatably supported by the second bearing 26.
  • a synthetic resin rotor support 50 is attached to the second rotating shaft 45. Details of the rotor support 50 will be described later.
  • the rotor 60 supported by the rotor support portion 50 is made of a nonmagnetic metal, for example, aluminum, and is configured in a cup shape by press molding.
  • the cylindrical wall portion of the rotor 60 is located between the magnet 25 and the magnetic conductor 24.
  • a whisker spring 46 that biases the second rotating shaft 45 is provided above the ceiling portion 42.
  • the whisker spring 46 is hooked on a hook 47 whose center is fixed to the second rotating shaft 45 and whose end is fixed to the ceiling 42. The end is fixed by, for example, heat caulking.
  • the whisker spring 46 biases the second rotating shaft 45 in a direction opposite to the direction of rotation of the rotor 60 due to eddy current.
  • the lid body 40 includes a left-side integrator support unit 70 and a right-side integrator support unit 80 that support both ends of the shaft (rotating shaft) 17 of the integrator 12.
  • the right accumulator support portion 80 includes a shaft hole (not shown) that supports one end of the shaft 17.
  • the left integrator support portion 70 extends in the vertical direction to support the other end of the shaft 17, and presses the U-shaped groove portion 71 and the shaft 17 supported by the shaft hole against the U-shaped groove portion 71.
  • An elastic piece 72 is provided.
  • the left counter 70 is provided with a protruding portion (one portion) 71a along the direction in which the U-shaped groove 71 extends.
  • the protrusion 71a is formed thinner than other parts.
  • the gap Wd of the protrusion 71a is narrowed after the accumulator 12 is placed has been described.
  • the protrusion 71a is further provided. It can be welded.
  • the portion provided with the pinion gear 12b of the accumulator 12 is covered with the bottom surface portion 43a and the back surface portion 43b. Therefore, it is difficult to disengage the pinion gear 12b from the outside when the accumulator 12 is assembled. Further, it is conceivable to change the display value of the accumulator 12 by removing the character wheel 12a. However, when the accumulator 12 is removed and tampered with, the accumulator Since the tamper mark 12 can be identified, unauthorized modification or tampering can be prevented.
  • the right-hand integrator support portion 80 is provided with a shaft hole.
  • the left-hand integrator support portion 70 may have the same structure, or the left and right integrator-support portions may be reversed. There is no problem.
  • the direction in which the elastic piece 72 is engaged with the shaft 17 and the tip portion of the protrusion 71a that is thermally deformed are provided in the same direction (Up side), so that the product is directed in the same direction in the manufacturing process. Since the integrator 12 can be assembled and held as it is, it is effective and the assembly process can be automated.
  • the instrument body 10 includes a damper mechanism 19 for suppressing the second rotation shaft 45 and the rotor 60 from rotating rapidly.
  • the damper mechanism 19 will be described.
  • the damper mechanism 19 includes an oil cup 52 that is filled with oil 51 and is rotatable together with the second rotating shaft 45, a resistance portion 49 that extends from the lid body 40 to the oil cup 52, and a tip portion 48 is immersed in the oil 51.
  • the wall part which consists of the bottom face part 43a and the back part 43b also has the effect
  • an insert hole 61 for insert-molding the rotor support portion 50 is formed in the center of the rotor 60.
  • the upper edge 62 that is the edge on the upper surface side of the insert hole 61 is chamfered.
  • the rotor support portion 50 includes a lower surface portion 53 that supports the lower surface side of the rotor 60, a main body portion 54 that extends from the center of the lower surface portion 53 along the second rotation shaft 45, and an upper surface that supports the upper surface side of the rotor 60. Part 55. From the upper surface portion 55, a support portion reinforcing portion 58 extends upward along the second rotation shaft 45.
  • the oil cup 52 has a cylindrical shape and is integrally provided on the upper surface portion 55 of the rotor support portion 50.
  • the oil cup 52 is surrounded by an oil reservoir 56 that accumulates oil spilled from the oil cup 52.
  • the oil reservoir 56 has an annular groove 56 a for storing oil, and is integrally provided on the upper surface 55 of the rotor support 50.
  • the oil reservoir 56 is provided on the edge of the upper surface 55 of the rotor support 50.
  • the oil reservoir 56 and the annular groove 56a are formed by extending the edge of the upper surface portion 55 upward.
  • the upper surface portion is located closer to the inner periphery than the edge of the upper surface portion 55.
  • An oil reservoir and an annular groove may be formed by forming an annular recess in 55.
  • the width W1 of the annular groove 56a is smaller than the distance D from the tip of the oil reservoir 56 to the lid 40.
  • the resistance portion 49 is formed integrally with the lid body 40.
  • the distal end portion 48 of the resistance portion 49 extends to the vicinity of the upper surface portion 55 of the rotor support portion 50.
  • the distal end portion 48 is provided so as to surround the support portion reinforcing portion 58.
  • the width W2 from the resistance portion 49 to the second rotation shaft 45 includes a portion wider than the width W3 from the distal end portion 48 of the resistance portion 49 to the support portion reinforcement portion 58.
  • a width W2 from the resistance portion 49 to the second rotation shaft 45 includes a portion wider than a width W4 from the tip portion 48 to the oil cup 52.
  • the vehicle speed meter S includes a first rotating shaft 23, a magnetic conductor 24, a magnet 25, a rotor 60, a second rotating shaft 45, and a pointer 11, and when the motorcycle travels, the first rotation is performed in conjunction with the rotation of the front wheels.
  • the shaft 23 rotates, and the magnetic conductor 24 and the magnet 25 fixed to the first rotating shaft 23 rotate integrally. Due to the rotation of the magnet 25, an eddy current is generated in the rotor 60 and the rotor 60 rotates.
  • the pointer 11 (see FIG. 1) is displaced together with the second rotating shaft 45 by the rotation of the rotor 60.
  • the rotational speed of the magnet 25 increases and the eddy current generated in the rotor 60 also increases.
  • the rotational force of the rotor 60 increases and the force for rotating the pointer 11 also increases.
  • the pointer 11 stops at a position that balances the urging force of the whisker spring 46. The occupant can visually recognize the traveling speed based on the position indicated by the pointer 11.
  • the rotation of the first rotating shaft 23 is transmitted to the accumulator 12 via the gear mechanism 16.
  • the occupant can visually recognize the distance traveled by the numbers indicated on the accumulator 12.
  • the pinion gear 12b is provided between the shaft 17 and the surface 12e on the opposite side of the display surface 12d of the accumulator 12.
  • the housing 43 (rear surface) is disposed on the display surface 12d of the accumulator 12. It may be provided between the shaft 17 and the surface 12f rotated 90 degrees around the axis of the shaft 17 on the side of the portion 43b).
  • the pinion gear 12b may be provided between the surface 12e and the surface 12f and the shaft 17, and it is more preferable that the pinion gear 12b be provided at a position where it cannot be seen from the exposed portion of the integrating meter 12.
  • the accumulator 12 is provided above the second rotating shaft 45 (the traveling direction of the two-wheeled vehicle), it may be provided below the second rotating shaft 45 (on the driver side).
  • the eddy current type instrument of the present invention is also suitable as a speedometer for automobiles, agricultural machinery, construction machinery, ships, and the like.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Instrument Panels (AREA)
  • Indicating Measured Values (AREA)

Abstract

L'invention concerne un instrument de type à courants de Foucault qui comprend un accumulateur dans lequel des pignons installés sur des roues de caractères sont moins susceptibles de se libérer. Un instrument de type à courants de Foucault 10 comporte : un rotor 23 ; un accumulateur 12 indiquant une distance de déplacement en amenant une roue de caractères 12a à tourner sur la base d'une rotation du rotor 23 ; un boîtier 40 qui porte de façon pivotante le rotor 23 et la roue de caractères 12a. Une matière de résine synthétique thermoplastique est appliquée sur le boîtier 40, une section de logement 43 pour loger l'accumulateur 12 est formée sur le boîtier 40, et un pignon 12b pour un port de la roue de caractères 12a est disposé entre un arbre tournant 17 de la roue de caractères 12a et la surface opposée de la section de logement 43.
PCT/JP2016/086708 2015-12-25 2016-12-09 Instrument de type à courants de foucault WO2017110521A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP2017557874A JP6747454B2 (ja) 2015-12-25 2016-12-09 渦電流式計器
CN201680075621.3A CN108474675B (zh) 2015-12-25 2016-12-09 涡电流式仪表

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2015252784 2015-12-25
JP2015-252784 2015-12-25

Publications (1)

Publication Number Publication Date
WO2017110521A1 true WO2017110521A1 (fr) 2017-06-29

Family

ID=59090108

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2016/086708 WO2017110521A1 (fr) 2015-12-25 2016-12-09 Instrument de type à courants de foucault

Country Status (3)

Country Link
JP (1) JP6747454B2 (fr)
CN (1) CN108474675B (fr)
WO (1) WO2017110521A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57156966U (fr) * 1981-03-28 1982-10-02
JPS614850Y2 (fr) * 1981-08-31 1986-02-14
JP2511338Y2 (ja) * 1990-05-29 1996-09-25 日本精機株式会社 カウンタ

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002162406A (ja) * 2000-11-22 2002-06-07 Nippon Seiki Co Ltd 回転検出装置
JP4519927B2 (ja) * 2008-05-20 2010-08-04 アルプス電気株式会社 回転角検出装置

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57156966U (fr) * 1981-03-28 1982-10-02
JPS614850Y2 (fr) * 1981-08-31 1986-02-14
JP2511338Y2 (ja) * 1990-05-29 1996-09-25 日本精機株式会社 カウンタ

Also Published As

Publication number Publication date
JPWO2017110521A1 (ja) 2018-10-11
CN108474675A (zh) 2018-08-31
JP6747454B2 (ja) 2020-08-26
CN108474675B (zh) 2020-11-27

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