WO2018190029A1 - ステップモータ及び車両用指針計器 - Google Patents

ステップモータ及び車両用指針計器 Download PDF

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Publication number
WO2018190029A1
WO2018190029A1 PCT/JP2018/008211 JP2018008211W WO2018190029A1 WO 2018190029 A1 WO2018190029 A1 WO 2018190029A1 JP 2018008211 W JP2018008211 W JP 2018008211W WO 2018190029 A1 WO2018190029 A1 WO 2018190029A1
Authority
WO
WIPO (PCT)
Prior art keywords
gear
output shaft
center line
step motor
radial bearing
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/JP2018/008211
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
佐々木　達也
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Denso Corp
Original Assignee
Denso Corp
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 Denso Corp filed Critical Denso Corp
Priority to CN201880013376.2A priority Critical patent/CN110325827B/zh
Priority to KR1020197026434A priority patent/KR20190116406A/ko
Priority to DE112018001994.2T priority patent/DE112018001994B4/de
Publication of WO2018190029A1 publication Critical patent/WO2018190029A1/ja
Priority to US16/566,125 priority patent/US11274730B2/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H1/00—Toothed gearings for conveying rotary motion
    • F16H1/02—Toothed gearings for conveying rotary motion without gears having orbital motion
    • F16H1/20—Toothed gearings for conveying rotary motion without gears having orbital motion involving more than two intermeshing members
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K35/00—Instruments specially adapted for vehicles; Arrangement of instruments in or on vehicles
    • B60K35/60—Instruments characterised by their location or relative disposition in or on vehicles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H1/00—Toothed gearings for conveying rotary motion
    • F16H1/02—Toothed gearings for conveying rotary motion without gears having orbital motion
    • F16H1/04—Toothed gearings for conveying rotary motion without gears having orbital motion involving only two intermeshing members
    • F16H1/06—Toothed gearings for conveying rotary motion without gears having orbital motion involving only two intermeshing members with parallel axes
    • 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
    • G01D13/00—Component parts of indicators for measuring arrangements not specially adapted for a specific variable
    • G01D13/22—Pointers, e.g. settable pointer
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K37/00—Motors with rotor rotating step by step and without interrupter or commutator driven by the rotor, e.g. stepping motors
    • H02K37/10—Motors with rotor rotating step by step and without interrupter or commutator driven by the rotor, e.g. stepping motors of permanent magnet type
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/08—Structural association with bearings
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/10—Structural association with clutches, brakes, gears, pulleys or mechanical starters
    • H02K7/116—Structural association with clutches, brakes, gears, pulleys or mechanical starters with gears
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K2360/00—Indexing scheme associated with groups B60K35/00 or B60K37/00 relating to details of instruments or dashboards
    • B60K2360/60—Structural details of dashboards or instruments
    • B60K2360/68—Features of instruments
    • B60K2360/698—Pointers of combined instruments
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K35/00—Instruments specially adapted for vehicles; Arrangement of instruments in or on vehicles
    • B60K35/20—Output arrangements, i.e. from vehicle to user, associated with vehicle functions or specially adapted therefor
    • B60K35/21—Output arrangements, i.e. from vehicle to user, associated with vehicle functions or specially adapted therefor using visual output, e.g. blinking lights or matrix displays
    • B60K35/23—Head-up displays [HUD]
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H57/00—General details of gearing
    • F16H57/02—Gearboxes; Mounting gearing therein
    • F16H2057/02039—Gearboxes for particular applications
    • F16H2057/02082—Gearboxes for particular applications for application in vehicles other than propelling, e.g. adjustment of parts

Definitions

  • the present disclosure relates to a step motor and a vehicle pointer instrument.
  • step motors that rotationally drive a rotating body have been widely used.
  • the technique disclosed in Patent Document 1 is rotationally driven by a step motor using a rotary pointer that indicates a vehicle state value as a rotating body.
  • the rotation pointer is configured to be rotatable around the rotation center line together with the output shaft portion that is inserted and radially supported in the inner peripheral side of the radial bearing in the output gear of the step motor.
  • a reduction mechanism is configured by a plurality of reduction gears that are meshed and connected directly or indirectly to the final stage gear portion that extends from the output shaft portion to the outer peripheral side in the output gear. ing. According to these configurations, it is possible to reduce the surface pressure received by the radial bearing due to the radial load from the output shaft portion while outputting a large rotational driving force from the output shaft portion to the rotating body.
  • the reduction gear meshed with the final stage gear meshes with another reduction gear on the side opposite to the radial bearing in the axial direction from the final stage gear portion of the output gear.
  • the reduction gear meshed with the final gear is engaged with another reduction gear on the radial bearing side in the axial direction from the final gear portion of the output gear. It turns out that it poses a challenge.
  • the problem is caused at the time of manufacturing as schematically shown in FIGS. Specifically, at the time of manufacturing, while inserting the output shaft portion 1001 of the output gear 1000 into the radial bearing 1002, the final gear portion 1005 of the output gear 1000 is engaged with one of the pair of reduction gears that are pre-engaged and assembled. Will be allowed to. However, in fact, in the single insertion step, the last gear portion 1005 of the output gear 1000 is difficult to mesh with the reduction gear 1003, and thus it is easy to get on. An assembly completion process for completing the engagement is required.
  • the support portion Pa of the final gear portion 1005 by the reduction gear 1003 and the support portion Pb of the output shaft portion 1001 by the radial bearing 1002 are closer to the reduction gear 1003 side than the original rotation center line C. If biased, the output gear 1000 will be in an unstable two-point support state.
  • the output shaft portion 1001 is supported by the radial bearing 1002 at two locations Pb and Pc on the opposite side to the reduction gear 1003 side relative to the original rotation center line C. 1000 becomes an unstable two-point support state.
  • These unstable support states become particularly prominent when a radial gap 1006 exists between the insertion inlet portion of the radial bearing 1002 and the output shaft portion 1001 as shown in FIGS.
  • One object of the present disclosure is to provide a step motor that ensures productivity.
  • Another object of the present disclosure is to provide a pointer instrument for a vehicle with which productivity is ensured.
  • a step motor that rotationally drives the rotating body includes: An output gear having an output shaft rotating around the rotation center line together with the rotating body, and a final gear portion extending from the output shaft to the outer peripheral side; A radial bearing that radially supports the output shaft portion inserted on the inner peripheral side on one side in the axial direction from the final gear portion; A reduction mechanism having a first reduction gear meshed with the last gear portion and a second reduction gear meshed with the first reduction gear on one side in the axial direction from the last gear portion;
  • the output gear includes a protrusion projecting from the radial bearing to the other side in the axial direction in a specific region extending from the longitudinal section including the rotation center line to the opposite side to the first reduction gear.
  • the vehicle pointer instrument of the present disclosure includes the above-described step motor and a rotation pointer that indicates a vehicle state value as a rotating body.
  • the first reduction gear meshed with the final gear portion meshes with the second reduction gear.
  • the output gear portion of the output gear is meshed with the first reduction gear among the first and second reduction gears meshed in advance while inserting the output shaft portion of the output gear into the radial bearing. Will be allowed to. At this time, even if the last gear portion gets on because it is difficult to mesh with the first reduction gear, the fall of the output gear can be suppressed.
  • the support portion of the output shaft portion added here is in the specific region extending from the longitudinal section including the original rotation center line to the opposite side to the first reduction gear, to the final gear portion side that is the other side in the axial direction. Protrusions protruding from the radial bearing appear by supporting the output shaft.
  • the output gear since the output gear is in a stable support state, even if the last gear portion climbs on the first reduction gear and tilts, the output gear can be prevented from falling. Therefore, productivity can be ensured during manufacturing.
  • FIG. 2 is a cross-sectional view showing a vehicular pointer instrument including a step motor according to the first embodiment, and is a cross-sectional view taken along the line II-II in FIG. 1.
  • It is a disassembled perspective view which shows the step motor by 1st embodiment.
  • It is a top view which shows the inside of the step motor by 1st embodiment.
  • It is a perspective view which shows the inside of the step motor by 1st embodiment.
  • FIG. 8 is a sectional view taken along line VIII-VIII in FIG. 7.
  • FIG. 13 is a sectional view taken along line XIII-XIII in FIG. 11. It is sectional drawing which expands and shows a part of step motor by 3rd embodiment, Comprising: It is sectional drawing corresponding to FIG. FIG. 15 is a cross-sectional view taken along line XV-XV in FIG. 14. It is sectional drawing which shows the modification of FIG.
  • the pointer instrument 1 for a vehicle As shown in FIGS. 1 and 2, the pointer instrument 1 for a vehicle according to the first embodiment is installed on an instrument panel in the vehicle.
  • the vehicle pointer instrument 1 includes a display member 2, a rotation pointer 4, and a step motor 6.
  • viewing side means the side where the display of the instrument 1 is visually recognized by a passenger on the driver's seat in the vehicle
  • anti-viewing side means “the viewing side”. Means the other side.
  • the display member 2 is formed by laminating a light-shielding printing layer on a translucent substrate such as polycarbonate resin, and has a flat plate shape as a whole.
  • the display surface 2a which is one surface of the display member 2 is arranged toward the viewing side.
  • an opening portion of the light-shielding print layer is formed by using numbers and scales arranged in the rotation direction of the rotation pointer 4 as an index 20 in order to display “vehicle state value”.
  • the “vehicle state value” in the present embodiment is a vehicle speed value as shown in FIG. 1, but may be a physical quantity related to the vehicle, such as an engine speed.
  • a warning lamp 21 for issuing a warning is formed around the rotation shaft 41 of the rotation pointer 4 in the opening portion of the light shielding printing layer in the display member 2.
  • the rotation pointer 4 as a “rotating body” is made of a translucent resin material such as acrylic resin, and has a pointer main body 40 and a rotation shaft 41.
  • the pointer main body 40 has an elongated needle shape as a whole, and is disposed on the viewing side with respect to the display surface 2 a of the display member 2.
  • the pointer main body 40 instructs the “vehicle state value” indicated by the index 20 according to the rotational position by the tip 40a.
  • the rotating shaft 41 as a whole has a cylindrical shape extending from the base end 40 b of the pointer main body 40 toward the non-viewing side.
  • the rotating shaft 41 is inserted into the pointer hole 22 that penetrates between both surfaces 2a and 2b in the display member 2.
  • the rotating shaft 41 is connected to the step motor 6 on the side opposite to the visual recognition side from the back surface 2b of the display member 2. Accordingly, the step motor 6 realizes the above instruction by the pointer main body 40 by rotationally driving the rotation pointer 4 around the rotation center line C that is the axis of the rotation shaft 41.
  • the step motor 6 is disposed on the counter-viewing side with respect to the back surface 2 b of the display member 2.
  • the step motor 6 includes a motor casing 60, a motor main body 63, a motor substrate 64, and light sources 65 and 66.
  • the motor casing 60 is formed by combining a pair of case members 61 and 62, and has a hollow shape as a whole.
  • Each case member 61, 62 is formed of a light-shielding resin material such as a modified polyphenylene ether resin (m-PPE), and is formed in a cup shape.
  • the case members 61 and 62 are coupled to each other by snap-fit fitting in a state where the opening edge portions 610 and 620 are overlapped with each other.
  • Each of the case members 61 and 62 has through holes 612 and 622 that pass through the bottom portions 611 and 621 on the rotation center line C of the pointer main body 40.
  • the first case member 61 is disposed to face the back surface 2b on the counter-viewing side of the display member 2.
  • the second case member 62 is disposed on the opposite side of the first case member 61.
  • the motor board 64 is formed by laminating a metal wiring layer on a printed board such as a glass epoxy board, and has a flat plate shape as a whole.
  • the motor substrate 64 is disposed on the opposite side of the motor casing 60.
  • a mounting surface 640 that is one surface of the motor substrate 64 has a planar shape.
  • a motor casing 60 and light sources 65 and 66 are held on the mounting surface 640.
  • the motor main body 63 is accommodated in the motor casing 60. Thereby, the motor main body 63 is mounted on the mounting surface 640 of the motor substrate 64 via the motor casing 60.
  • the motor body 63 includes a drive source D, a speed reduction mechanism R, and a rotation output mechanism O.
  • the drive source D is a combination of the yoke 630, the two-phase coils 631a and 631b, and the magnet rotor 632, and is disposed away from the rotation center line C of the pointer body 40 in the radial direction.
  • the yoke 630 is formed in a frame shape from a magnetic metal material such as iron and is fixed to the motor casing 60.
  • the yoke 630 has a pair of magnetic poles 630a and 630b protruding to the inner peripheral side.
  • An A-phase coil 631a is wound around one magnetic pole 630a, and a B-phase coil 631b is wound around the other magnetic pole 630b.
  • the coils 631a and 631b of the phases A and B are electrically connected to the metal wiring layer of the motor board 64 through a through hole that penetrates the second case member 62 of the motor casing 60.
  • the magnet rotor 632 is formed in a disk shape from a magnetic metal material such as ferrite, and is disposed on the inner peripheral side of the yoke 630 with a gap between each of the magnetic poles 630a and 630b.
  • the magnet rotor 632 is radially supported and thrust supported by the motor casing 60 so as to be rotatable about an axis substantially parallel to the rotation center line C of the pointer main body 40.
  • N and S poles as magnetic poles are alternately magnetized in the rotation direction.
  • the speed reduction mechanism R is a combination of a magnet gear 634 and an intermediate gear 635, and is arranged radially away from the rotation center line C of the pointer body 40.
  • the magnet gear 634 as the “second reduction gear” is made of a hard resin material such as polyacetal resin (POM) and has a spur gear shape.
  • the magnet gear 634 is radially supported and thrust supported by the motor casing 60 so as to be integrally rotatable with the magnet rotor 632.
  • the intermediate gear 635 as the “first reduction gear” is formed of a hard resin material such as polybutylene terephthalate resin (PBT), and integrally includes a pair of gear portions 635a and 635b arranged in the axial direction.
  • Each gear part 635a, 635b has a spur gear shape.
  • the gear portions 635a and 635b are supported in a radial and thrust manner by the motor casing 60 so as to be rotatable around an axis substantially parallel to the rotation center line C of the pointer main body 40.
  • the idle gear portion 635a meshes with the magnet gear 634 on the counter-viewing side, which is “one side in the axial direction”, with respect to the pinion gear portion 635b and the final gear portion 638 that mesh with each other as will be described later. Decelerate the rotation.
  • the rotation output mechanism O is a combination of an output gear 636 and a rotation stopper 639 and is disposed on the rotation center line C of the pointer main body 40.
  • the output gear 636 and the rotation stopper 639 are integrally formed of a hard resin material such as polyacetal resin (POM).
  • POM polyacetal resin
  • the output gear 636 and the rotation stopper 639 are radially supported and thrust supported by the motor casing 60 so as to be integrally rotatable around the rotation center line C of the pointer main body 40.
  • the output gear 636 has an output shaft portion 637 and a final gear portion 638.
  • the output shaft portion 637 has a cylindrical shape as a whole.
  • the rotation shaft 41 of the rotation pointer 4 is press-fitted coaxially.
  • the final gear portion 638 has a spur gear shape that spreads from the output shaft portion 637 to the outer peripheral side.
  • the last gear portion 638 meshes with the pinion gear portion 635b of the intermediate gear 635 in the reduction mechanism R, thereby reducing the rotation of the gear 635.
  • the rotation stopper 639 has a protruding piece shape that protrudes from the last gear portion 638 on the viewing side that is “the other side in the axial direction”.
  • the rotation stopper 639 is provided so as to be locked by a fixed stopper of the motor casing 60 at the limit positions on both sides that determine the rotation range of the rotation pointer 4. As a result, even if a rotational driving force is applied from the rotation output mechanism O to the rotation pointer 4, the rotation of the pointer 4 outside the rotation range is limited.
  • the rotating body illumination light source 65 is disposed on the rotation center line C of the pointer main body 40 in the through hole 622 of the second case member 62, and is mounted on the mounting surface 640 of the motor board 64. .
  • the rotating body illumination light source 65 is mainly composed of LEDs (Light-Emitting-Diodes) and is electrically connected to the metal wiring layer of the motor board 64.
  • the rotating body illumination light source 65 emits light when energized from an external control circuit through the metal wiring layer.
  • the light emitted from the rotating body illumination light source 65 passes through the through-hole 622 of the second case member 62 and the center hole 637a of the output shaft portion 637 and is incident on the rotation shaft 41 of the rotation pointer 4 so that the pointer 4 To the pointer main body 40. Thereby, the rotation pointer 4 is illuminated through the motor main body 63, so that the pointer main body 40 is visually recognized in a light-emitting state.
  • a plurality of display illumination light sources 66 are arranged around the second case member 62 and mounted on the mounting surface 640 of the motor board 64.
  • Each display illumination light source 66 is mainly composed of LEDs, and is electrically connected to the metal wiring layer of the motor board 64.
  • Each display illumination light source 66 emits light when energized at the time of a necessary warning from an external control circuit via a metal wiring layer. The light emitted from the display illumination light source 66 passes through the periphery of the motor casing 60 and enters the display member 2. As a result, the display member 2 is directly illuminated so that the warning lamp 21 emits light when a necessary warning is issued.
  • the output shaft portion 637 of the output gear 636 has the first outer straight portion 81 and the second outer straight portion on the viewing side and the non-viewing side with the final gear portion 638 in the axial direction, respectively. Part 82.
  • the output shaft portion 637 has the second outer straight portion 82 and the first outer straight portion 81 on the “one axial direction side” and the “axial other side” respectively than the final gear portion 638. ing.
  • the first outer straight portion 81 is provided in a predetermined axial direction range from the viewing-side tip 637 b to the anti-viewing-side final gear portion 638 in the output shaft portion 637.
  • the first outer peripheral straight portion 81 has a cylindrical surface extending straight along the axial direction on the outer peripheral surface.
  • the second outer peripheral straight portion 82 is provided in a predetermined axial range from the non-viewing-side base end 637 c to the viewing-side final gear portion 638 in the output shaft portion 637. Yes.
  • the second outer peripheral straight portion 82 has a cylindrical surface extending straight along the axial direction on the outer peripheral surface.
  • the first case member 61 of the motor casing 60 has a first radial bearing 85 formed by a part in the axial direction of a through hole 612 that coaxially surrounds the output shaft portion 637. is doing.
  • the first radial bearing 85 is provided in a predetermined axial range spaced from the outer surface 611 a of the bottom 611 toward the non-viewing side in the first case member 61.
  • the first radial bearing 85 has a cylindrical hole shape that extends straight along the axial direction on the inner peripheral surface.
  • the inner diameter of the first radial bearing 85 is set to be smaller than the inner diameter of the portion located on both sides in the axial direction of the bearing 85 in the through hole 612.
  • first outer peripheral straight portion 81 In the entire axial direction of the first radial bearing 85, a part of the first outer peripheral straight portion 81 in the axial direction is coaxially inserted.
  • a first outer peripheral straight portion 81 that is formed to have a slightly smaller diameter than the bearing 85 before insertion is fitted to the inner peripheral side of the first radial bearing 85 so as to be slidable relative to each other.
  • the first radial bearing 85 radially supports the output shaft portion 637 inserted on the inner peripheral side on the side opposite to the visual recognition side “one axial direction” from the final stage gear portion 638 from the outer peripheral side.
  • the second case member 62 of the motor casing 60 has a second radial portion formed by a part in the axial direction of the cylindrical portion 624 that protrudes from the bottom 621 to the viewing side of “the other side in the axial direction”.
  • a bearing 87 is provided.
  • the second radial bearing 87 is provided in the second case member 62 within a predetermined axial range from the bottom 621.
  • the second radial bearing 87 forms a sliding support portion 870 and a loose insertion portion 871.
  • the sliding support portion 870 has a cylindrical shape with a bottom that extends coaxially with the through hole 622 of the second case member 62 and extends straight along the axial direction on the inner peripheral surface.
  • the inner diameter of the sliding support portion 870 is set to be larger than the inner diameter of the through hole 622.
  • the bottom surface 872 of the sliding support portion 870 has an annular planar shape.
  • the loose insertion portion 871 forms a viewing-side opening end of the second radial bearing 87.
  • the loose insertion portion 871 has a cylindrical surface shape that extends coaxially with the sliding support portion 870 and extends straight along the axial direction on the inner peripheral surface.
  • the loose insertion portion 871 is set to have a larger diameter than the inner diameter of the sliding support portion 870.
  • a part in the axial direction of the second outer peripheral straight part 82 is coaxially inserted in the entire axial direction of the respective parts 870 and 871.
  • a second outer peripheral straight portion 82 formed with a slightly smaller diameter than the portion 870 is fitted on the inner peripheral side of the sliding support portion 870 so as to be relatively slidable.
  • the bottom surface 872 of the sliding support portion 870 is in contact with an end surface 88 having an annular planar shape at the base end 637c of the output shaft portion 637 in a surface contact state in which relative sliding is possible. Yes.
  • the second outer peripheral straight portion 82 has a radial gap 83 on the inner peripheral side of the loose insertion portion 871 that forms the insertion inlet portion (that is, the viewing side opening end) of the second radial bearing 87. It is loosely inserted.
  • the second radial bearing 87 thrust-supports the output shaft portion 637 inserted on the inner peripheral side on the side opposite to the visual recognition side than the final gear portion 638, and radially supports the coaxial portion 637 from the outer peripheral side. .
  • the second case member 62 has a projection 89 that protrudes further from the second radial bearing 87 formed by the cylindrical portion 624 to the viewing side.
  • the protrusion 89 is provided in the second case member 62 within a predetermined axial range from the second radial bearing 87.
  • the protrusion 89 has an arcuate surface on the inner peripheral surface that is coaxial with the loose insertion portion 871 of the second radial bearing 87 and extends straight along the axial direction.
  • the inner diameter of the protrusion 89 is set to be larger than the inner diameter of the sliding support portion 870 in the second radial bearing 87 and substantially the same diameter as the loose insertion portion 871 in the bearing 87.
  • the protrusion 89 has a radial clearance 84 between the output shaft portion 637 and the second outer peripheral straight portion 82 inserted into the second radial bearing 87.
  • the radial gap 84 between the protrusion 89 and the second outer straight portion 82 is radial with respect to the radial gap 83 between the loose insertion portion 871 and the straight portion 82 of the second radial bearing 87.
  • the boundary line between the protrusion 89 and the second radial bearing 87 is schematically shown by a two-dot chain line.
  • the projection body 89 of the present embodiment has a specific area A as a space extending from the longitudinal section L including the rotation center line C to the opposite side of the intermediate gear 635 in the output gear 636. Projecting from the second radial bearing 87.
  • the height of the cylindrical portion 624 that forms the second radial bearing 87 is higher than the area on the intermediate gear 635 side of the longitudinal section L.
  • the height of the protrusion 89 is higher than that of the protrusion 89.
  • the protrusion 89 according to the present embodiment continuously spreads over the entire 180 ° range around the rotation center line C in the specific region A.
  • the protrusion 89 has a structure provided at least at a position Po opposite to the axis of the intermediate gear 635 with the rotation center line C in the radial direction in the specific region A.
  • step S10 The manufacture of the step motor 6 provided with the fall prevention structure 8 having such a configuration is performed according to the flow shown in FIG.
  • the drive source D and the magnet gear 634 are accommodated in the second case member 62 that opens upward, and then the intermediate gear 635 is meshed with the magnet gear 634 so as to reduce the speed reduction mechanism R.
  • the intermediate gear 635 is meshed with the magnet gear 634 so as to reduce the speed reduction mechanism R.
  • the second outer peripheral straight portion 82 of the output shaft portion 637 of the output gear 636 is inserted into the second radial bearing 87 in the second case member 62 opening upward.
  • the last gear portion 638 of the output gear 636 properly engages with the intermediate gear 635 (see the state of FIG. 7), and rides without engaging with the intermediate gear 635 (see the state of FIG. 11). ) Is assumed to occur.
  • step S30 the output gear 636 is vibrated and pressed toward the second radial bearing 87 in the second case member 62 that opens upward.
  • the first case member 61 is assembled to the second case member 62, and then the cases The members 61 and 62 are held on the motor board 64.
  • the step motor 6 which completes manufacture in this way is mounted in the vehicle after being incorporated in the pointer instrument 1 for the vehicle after the completion of the manufacture.
  • the intermediate gear 635 with which the gear portion 638 meshes with the magnet gear 634 on the second radial bearing 87 side, which is “one side in the axial direction” of the final gear portion 638 of the output gear 636, the intermediate gear 635 with which the gear portion 638 meshes with the magnet gear 634.
  • the meshing structure according to the first embodiment is used to arrange the output gear 636 protruding from the final stage gear portion 638 from the final gear portion 638 to the “other axial side” opposite to the second radial bearing 87 in a small size. Is suitable.
  • the output shaft portion 637 of the output gear 636 is inserted into the second radial bearing 87 and the intermediate gear 635 among the gears 635 and 634 meshed in advance is connected to the final stage of the output gear 636.
  • the gear part 638 is meshed.
  • the support position P1 of the final gear portion 638 by the intermediate gear 635 and the support position P2 of the output shaft portion 637 by the second radial bearing 87 are intermediate between the original rotation center line C.
  • the support portion P3 of the output shaft portion 637 is added to the side opposite to the intermediate gear 635 with respect to the rotation center line C, although it is biased toward the gear 635 side.
  • the support portion P3 of the output shaft portion 637 added here is “the other side in the axial direction” in the specific region A extending from the longitudinal section L including the original rotation center line C to the side opposite to the intermediate gear 635.
  • the protrusion 89 that protrudes from the second radial bearing 87 toward the final gear portion 638 appears by supporting the output shaft portion 637.
  • the output gear 636 is in a stable support state, even if the final gear portion 638 climbs onto the intermediate gear 635 and tilts, the output gear 636 can be prevented from falling.
  • the radial gap 83 exists between the insertion inlet portion of the second radial bearing 87 and the second outer straight portion 82 of the output shaft portion 637, the output gear 636 is supported stably. Therefore, the effect of suppressing the fall of the output gear 636 can be remarkably exhibited. Further, such a fall-suppressing effect of the output gear 636 is particularly effective when, for example, the second case member 62 is moved and conveyed between steps S20 and S30 in the manufacturing flow of FIG. Therefore, productivity can be ensured during manufacturing.
  • the output gear 636 riding on the intermediate gear 635 is particularly easily inclined to the opposite side of the intermediate gear 635 across the rotation center line C in the radial direction in the specific region A. Therefore, since at least a projection 89 is provided at a position Po on the opposite side of the intermediate gear 635 across the rotation center line C in the radial direction in the specific region A, the position Po is provided on the output shaft portion 637 by the projection 89. It becomes easy to become the support location P3. Therefore, even if the output gear 636 rides on the intermediate gear 635 and tilts at the time of manufacture, the reliability of the effect of suppressing the fall of the output gear 636 can be improved and the productivity can be ensured.
  • the entire region around the rotation center line C in the specific region A can cover the entire inclined side of the output gear 636 riding on the intermediate gear 635. Therefore, according to the protrusion 89 that spreads in the entire region around the rotation center line C in the specific region A, the support portion P3 of the output shaft portion 637 can be reliably exposed. Therefore, even if the output gear 636 climbs onto the intermediate gear 635 and tilts at the time of manufacture, it is possible to ensure the effect of suppressing the fall of the output gear 636 and to ensure productivity.
  • the protrusion 89 that opens the radial gap 84 between the output shaft portion 637 inserted in the second radial bearing 87 is the output shaft inserted into the second radial bearing 87 at the time of manufacture. It becomes difficult to interfere with the part 637. Therefore, according to such a protrusion 89, not only the output gear 636 falls, but also the insertion interference of the output shaft portion 637 can be suppressed, and the productivity can be improved.
  • the second embodiment is a modification of the first embodiment.
  • the inner diameter of the protrusion 2089 according to the second embodiment is set to be substantially the same as the inner diameter of the sliding support portion 870 in the second radial bearing 2087 without the loose insertion portion 871.
  • the protrusion 2089 supports the second outer straight portion 82 inserted into the second radial bearing 87 in the output shaft 637 from the outer peripheral side.
  • the configurations of the protrusion 2089 and the second radial bearing 2087 other than those described above are the same as the configurations of the protrusion 89 and the second radial bearing 2087 according to the first embodiment.
  • the protrusion 2089 radially supports the output shaft portion 637 inserted into the second radial bearing 2087 from the outer peripheral side, so that the reaction force received by the final gear portion 638 from the intermediate gear 635 is received.
  • the tilt of the output gear 636 can be restricted. According to this, not only productivity at the time of manufacture but also operational stability after manufacture can be ensured.
  • the third embodiment is a modification of the first embodiment.
  • a plurality of the protrusions 3089 according to the third embodiment are arranged in the specific area A so as to be distributed at substantially equal intervals around the rotation center line C.
  • Each protrusion 3089 has an arc column shape in which the inner peripheral portion extends along an imaginary circle having substantially the same diameter as the inner diameter of the loose insertion portion 871 in the second radial bearing 87.
  • each protrusion 3089 has a radial gap 3084 in axial communication with the radial gap 83 between the output shaft 637 and the second outer straight portion 82 inserted into the second radial bearing 87. Open.
  • At least one specific protrusion 3089a among the plurality of specific regions A is provided at a position Po opposite to the intermediate gear 635 across the rotation center line C in the radial direction.
  • the structure except having demonstrated above is based on the structure of the protrusion 89 by 1st embodiment.
  • the plurality of protrusions 3089 dispersed around the rotation center line C in the specific region A cover the inclined side of the output gear 636 that rides on the intermediate gear 635, and the output shaft It is easy to make the support point P3 of the part 637 appear. Therefore, even if the output gear 636 rides on the intermediate gear 635 and tilts at the time of manufacture, the reliability of the effect of suppressing the fall of the output gear 636 can be improved and the productivity can be ensured.
  • FIGS. 16 to 18 representatively show modifications related to the first embodiment
  • FIG. 19 representatively shows a modification related to the second embodiment
  • FIGS. 20 to 23 show modifications related to the third embodiment. An example is shown representatively.
  • the inner peripheral surface of the protrusion 89 and the inner peripheral surface of the loose insertion portion 871 of the second radial bearing 87 are Of these, it may be formed in a tapered surface shape that gradually decreases in diameter toward the sliding support portion 870.
  • the protrusion 89 is formed in a pin shape such as a cylindrical shape in contact with a virtual circle having substantially the same diameter as the inner diameter of the loose insertion portion 871.
  • a radial clearance 84 may be provided between the second outer peripheral straight portion 82 and the second outer peripheral straight portion 82.
  • the protrusion 2089 is formed in a pin shape such as a column that contacts a virtual circle having substantially the same diameter as the inner diameter of the sliding support portion 870.
  • the second outer straight portion 82 may be supported from the outer peripheral side.
  • each of the protrusions 3089 is made substantially the same diameter as the inner diameter of the sliding support portion 870 under the use of the second radial bearing 2087 according to the second embodiment.
  • the second outer straight portion 82 may be radially supported from the outer peripheral side by forming an arc column with the inner peripheral portion extending along the virtual circle.
  • each protrusion 3089 is formed in a pin shape such as a cylindrical shape in contact with an imaginary circle having substantially the same diameter as the inner diameter of the loose insertion portion 871.
  • a radial clearance 3084 may be formed between the outer peripheral straight portion 82 and the outer peripheral straight portion 82.
  • each of the protrusions 3089 is made to have substantially the same diameter as the inner diameter of the sliding support portion 870 under the use of the second radial bearing 2087 according to the second embodiment.
  • the second outer straight portion 82 may be supported from the outer peripheral side by forming a pin shape such as a cylindrical shape in contact with the virtual circle.
  • the present disclosure is applied to a device other than the vehicle pointer instrument 1 such as a head-up display (HUD), and the “rotary body” of the device is rotated by the step motor 6. It may be driven.
  • HUD head-up display

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Power Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
  • Instrument Panels (AREA)
  • Gear Transmission (AREA)
PCT/JP2018/008211 2017-04-13 2018-03-05 ステップモータ及び車両用指針計器 Ceased WO2018190029A1 (ja)

Priority Applications (4)

Application Number Priority Date Filing Date Title
CN201880013376.2A CN110325827B (zh) 2017-04-13 2018-03-05 步进马达以及车辆用指针仪表
KR1020197026434A KR20190116406A (ko) 2017-04-13 2018-03-05 스텝 모터 및 차량용 지침 계기
DE112018001994.2T DE112018001994B4 (de) 2017-04-13 2018-03-05 Schrittmotor und Anzeigeeinrichtungsinstrument für ein Fahrzeug
US16/566,125 US11274730B2 (en) 2017-04-13 2019-09-10 Step motor and indicator instrument for vehicle

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2017-079881 2017-04-13
JP2017079881A JP6673282B2 (ja) 2017-04-13 2017-04-13 ステップモータ及び車両用指針計器

Related Child Applications (1)

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US16/566,125 Continuation US11274730B2 (en) 2017-04-13 2019-09-10 Step motor and indicator instrument for vehicle

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WO2018190029A1 true WO2018190029A1 (ja) 2018-10-18

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JP (1) JP6673282B2 (enExample)
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JP6733593B2 (ja) * 2017-04-13 2020-08-05 株式会社デンソー ステップモータ及び車両用指針計器
CN113491126B (zh) * 2018-12-28 2024-04-05 知识产权之桥一号有限责任公司 图像编码装置、图像编码方法以及图像编码程序、图像解码装置、图像解码方法以及图像解码程序

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JP2001281361A (ja) * 2000-04-03 2001-10-10 Rhythm Watch Co Ltd 時計用ムーブメント
JP2003254797A (ja) * 2002-03-01 2003-09-10 Denso Corp 指針計器用回動内機

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JP5255480B2 (ja) 2009-02-18 2013-08-07 矢崎総業株式会社 指示計器用の駆動装置
JP5545946B2 (ja) 2009-11-09 2014-07-09 矢崎総業株式会社 メータ装置の照明構造
JP5721522B2 (ja) * 2011-04-28 2015-05-20 矢崎総業株式会社 計器ユニット
JP5735851B2 (ja) * 2011-04-28 2015-06-17 矢崎総業株式会社 指針装置及びこれを取り付けたメータ装置
JP6059506B2 (ja) * 2012-10-22 2017-01-11 日本電産サンキョー株式会社 ギアードモータ
DE102014107900A1 (de) * 2013-06-07 2014-12-11 Minebea Co., Ltd Getriebe-Anordnung
JP2015152157A (ja) 2014-02-19 2015-08-24 矢崎総業株式会社 動力伝達歯車ユニット及び車両用計器
JP6460749B2 (ja) 2014-11-21 2019-01-30 日本電産サンキョー株式会社 ギアードモータおよび指針式表示装置
JP2017079881A (ja) 2015-10-23 2017-05-18 株式会社プレックス 布類の種類識別装置および種類識別方法
DE202016105820U1 (de) * 2016-10-18 2016-11-09 Point Well Technology (Hong Kong) Limited Hochgeschwindigkeitsschrittmotor

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JP2001281361A (ja) * 2000-04-03 2001-10-10 Rhythm Watch Co Ltd 時計用ムーブメント
JP2003254797A (ja) * 2002-03-01 2003-09-10 Denso Corp 指針計器用回動内機

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Publication number Publication date
DE112018001994B4 (de) 2025-12-04
CN110325827A (zh) 2019-10-11
US11274730B2 (en) 2022-03-15
JP2018179767A (ja) 2018-11-15
CN110325827B (zh) 2021-07-09
US20200003278A1 (en) 2020-01-02
KR20190116406A (ko) 2019-10-14
JP6673282B2 (ja) 2020-03-25
DE112018001994T5 (de) 2019-12-19

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