JPS59166870A - Electric speedometer - Google Patents
Electric speedometerInfo
- Publication number
- JPS59166870A JPS59166870A JP58041952A JP4195283A JPS59166870A JP S59166870 A JPS59166870 A JP S59166870A JP 58041952 A JP58041952 A JP 58041952A JP 4195283 A JP4195283 A JP 4195283A JP S59166870 A JPS59166870 A JP S59166870A
- Authority
- JP
- Japan
- Prior art keywords
- worm gear
- pulse motor
- rotating shaft
- pointer
- revolving shaft
- 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.)
- Granted
Links
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
- G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
- G01D5/02—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using mechanical means
- G01D5/04—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using mechanical means using levers; using cams; using gearing
-
- 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
- F16H1/12—Toothed gearings for conveying rotary motion without gears having orbital motion involving only two intermeshing members with non-parallel axes
- F16H1/16—Toothed gearings for conveying rotary motion without gears having orbital motion involving only two intermeshing members with non-parallel axes comprising worm and worm-wheel
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Indication And Recording Devices For Special Purposes And Tariff Metering Devices (AREA)
- Transmission And Conversion Of Sensor Element Output (AREA)
- Transmission Devices (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は電気式速度計に関し、特に初期リセットの際の
強制逆転時における減速機構のギヤの乗り上げによるロ
ック状態の発生を防止する機構を備えた電気式速度計に
関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an electric speedometer, and more particularly to an electric speedometer equipped with a mechanism for preventing a locked state due to a gear of a reduction mechanism running over during forced reversal during initial reset.
近年速度計、タコメータ等の車輌用の計器の駆動装置と
して小型のパルスモータが使用されつつあり、第１図に
示すように一端部に図示しない計器の指針１が固着され
、他端部にへりカルギヤ３が緩衝ばね４を介して装着さ
れた回転軸２の前記へりカルギヤ３にパルスモーク５の
回転軸６に固着したウオームギヤ７を噛合させ、例えば
車速に応じて図示しない車速センサから逐次出力される
パルス信号を制御装置で演算処理して対応する駆動信号
をパルスモーク５に供給し、パルスモーク５を駆動させ
、ウオームギヤ７、緩衝ばね４及びヘリカルギヤ３で構
成した減速機構を介して計器の回転軸２を回転させ、指
針１を所定の指示位置に回動させるようにしている。In recent years, small pulse motors have been used as driving devices for vehicle instruments such as speedometers and tachometers, and as shown in Figure 1, an instrument pointer 1 (not shown) is fixed to one end, and a lip is attached to the other end. A worm gear 7 fixed to the rotating shaft 6 of the pulse smoke 5 is meshed with the helical gear 3 of the rotating shaft 2 to which the cal gear 3 is attached via a buffer spring 4, and a worm gear 7 fixed to the rotating shaft 6 of the pulse smoke 5 is sequentially outputted from a vehicle speed sensor (not shown) according to the vehicle speed, for example. The control device processes the pulse signal and supplies the corresponding drive signal to the pulse smoke 5, which drives the pulse smoke 5 and rotates the instrument via a speed reduction mechanism composed of a worm gear 7, a buffer spring 4, and a helical gear 3. By rotating the shaft 2, the pointer 1 is rotated to a predetermined pointing position.
パルスモータ５の制御方法としては、所定時間毎に前記
車速センサから出力されるパルスを計数し、この計数値
に応じてパルスモーク５をステップ的に逐次回転させて
現在の車速を指示させ、車速の変化したときには前回の
パルスの計数値と今回のパルスの計数値との差分だけパ
ルスモータ５を駆動させるようにしたオープンループ式
の駆動方法がある。かかる制御方法においては車輌の始
動時に指針位置を零位置ヘリセットする必要があり、初
期リセットをかけて第２図に示すようにパルスモータ５
を矢印Ａで示す方向に逆回転させ、回転軸２を矢印Ｂで
示す方向に回転させて指針１を零位置の方向にフルスケ
ール分だけ強制的に回転させるようになされている。The pulse motor 5 is controlled by counting the pulses output from the vehicle speed sensor at predetermined intervals, and sequentially rotating the pulse smoke 5 step by step according to the counted value to indicate the current vehicle speed. There is an open-loop drive method in which the pulse motor 5 is driven by the difference between the previous pulse count and the current pulse count when the pulse count changes. In this control method, it is necessary to reset the pointer position to the zero position when starting the vehicle, and after initial reset, the pulse motor 5 is activated as shown in FIG.
is reversely rotated in the direction shown by arrow A, and the rotating shaft 2 is rotated in the direction shown by arrow B, so that the pointer 1 is forcibly rotated by a full scale amount in the direction of the zero position.
指針１の零位置は第２図及び第３図に示すようにハウジ
ング８に突設したストッパ８ｂにヘリカルギヤ３に突設
した突起部３ｂを当接させることにより規制している。The zero position of the pointer 1 is regulated by bringing a protrusion 3b protruding from the helical gear 3 into contact with a stopper 8b protruding from the housing 8, as shown in FIGS. 2 and 3.
ところで、速度側が止木な状態においては車輌の停止時
には指針１は零位置に戻っており、ヘリカルギヤ３の突
起部３ｂはストッパ８ｂにより係止されて矢印Ｂ方向へ
の回転が阻止されている。ところが、始動時にはパルス
モータ５は前述したように指針１を零位置に戻すべく矢
印Ａ方向に強制的に逆回転され、この結果ウオームギヤ
７の歯７ａがヘリカルギヤ３の歯３ａに乗り上げてこれ
らのギヤ３と７とがロック状態となり計器が作動し得な
くなるということが屡あった。By the way, in a state where the speed side is a stop, the pointer 1 returns to the zero position when the vehicle is stopped, and the protrusion 3b of the helical gear 3 is locked by the stopper 8b to prevent rotation in the direction of arrow B. However, at startup, the pulse motor 5 is forcibly rotated in the direction of arrow A in order to return the pointer 1 to the zero position as described above, and as a result, the teeth 7a of the worm gear 7 ride on the teeth 3a of the helical gear 3, causing these gears to 3 and 7 were often locked and the instrument could no longer operate.
本発明は上述の点に鑑みてなされたもので、パルスモー
タを用いた速度計又はタコメータの始動時に初期リセッ
トをがけて指針を零位置方向にフルスケール分強制的に
回転させ、且つ減速機構にウオームギヤとヘリカルギヤ
とを使用したタイプの速度計の前記強制逆回転時におけ
る前記ウオームギヤの前記へりカルギヤへの乗り上げに
よるロック状態の発生を防止することを目的とする。The present invention has been made in view of the above-mentioned points, and includes an initial reset at the time of starting a speedometer or tachometer using a pulse motor, forcibly rotating the pointer by a full scale amount in the direction of the zero position, and a speed reduction mechanism. It is an object of the present invention to prevent the occurrence of a locked state due to the worm gear riding on the helical gear during the forced reverse rotation of a speedometer of a type using a worm gear and a helical gear.
この目的を達成するために本発明においては、車速セン
サから出力されるパルス信号に基づいてパルスモータを
駆動し、該パルスモータの回転を減速機構を介して指針
に伝達し当該指針を駆動する電気式速度計において、前
記減速機構を前記パルスモータの回転軸に遊嵌したウオ
ームギヤと、該ウオームギヤと噛合し前記指針の回転軸
に装着したへりカルギヤと、前記パルスモータの回転軸
の一方向の回転に対しては当該ウオームギヤを前記回転
軸に係合させ且つ前記回転軸に他方向に所定の回転力以
上の回転力が加わったときには前記係合を解除するスリ
ップ機構とにより構成した電気式速度計を提供するもの
である。In order to achieve this object, the present invention drives a pulse motor based on a pulse signal output from a vehicle speed sensor, transmits the rotation of the pulse motor to a pointer via a deceleration mechanism, and generates an electric current that drives the pointer. In the type speedometer, a worm gear in which the speed reduction mechanism is loosely fitted onto the rotating shaft of the pulse motor, a helical gear that engages with the worm gear and is attached to the rotating shaft of the pointer, and a rotation shaft of the pulse motor that rotates in one direction. and a slip mechanism that engages the worm gear with the rotating shaft and releases the engagement when a rotational force greater than a predetermined rotational force is applied to the rotating shaft in the other direction. It provides:
以下本発明の一実施例を添附図面に基いて詳述する。An embodiment of the present invention will be described in detail below with reference to the accompanying drawings.
第４図は本発明を適用した電気式速度計のパルスモータ
の縦断面図を、第５図は第４図のパルスモータの組立斜
視図を示し、第４図及び第５図においてパルスモータ１
ｏは互いに整合して対向配設された２つのハウジング１
１．１４、これらのハウジンク１１と１４との間に嵌合
装着されたステータエ９、ハウジング１１及び１４とス
テータ１９とｃ間に装着された励磁コイル１７．１８、
及びハウジング１１．１４、ステータ１９内に僅かな空
隙で遊嵌され且つ回転軸２２がハウジング１１．１４の
各軸受装ＭＬ １３．１６に軸支されたロータ２０等に
より構成されている。FIG. 4 shows a longitudinal sectional view of a pulse motor of an electric speedometer to which the present invention is applied, and FIG. 5 shows an assembled perspective view of the pulse motor of FIG.
o denotes two housings 1 aligned and facing each other.
1.14, a stator 9 fitted between these housings 11 and 14, an excitation coil 17 and 18 fitted between the housings 11 and 14 and the stators 19 and c;
The rotor 20 is loosely fitted into the housing 11.14 and the stator 19 with a small gap, and the rotating shaft 22 is supported by each bearing ML 13.16 of the housing 11.14.
ハウジング１１．１４及びステータ１９ば磁性部材例え
ば鉄板で形成されており、ハウジング１１．１４の各端
板１２．１５に装着された軸受装置１３．１６ば夫々耐
熱性及び耐摩耗性を有する合成樹脂部材例えばプラスチ
ック部材により端板１２．１５に一体成形により形成さ
れている。The housing 11.14 and the stator 19 are made of a magnetic member, for example, an iron plate, and the bearing devices 13.16 mounted on each end plate 12.15 of the housing 11.14 are made of a synthetic resin having heat resistance and wear resistance, respectively. A component, for example a plastic component, is integrally molded onto the end plate 12.15.
ロータ２０は円筒状をなし軸芯には耐熱性及び耐摩耗性
を有する合成樹脂部材例えばプラスチック部材で形成さ
れた軸固定用の保持部材２１を介して回転軸２２が貫通
装着されている。このロータ２ｏはフェライト等の磁性
部材で形成され、周面には所定の間隔で所定数の磁極が
設けられている。The rotor 20 has a cylindrical shape, and a rotating shaft 22 is mounted through the shaft core through a shaft-fixing holding member 21 formed of a heat-resistant and wear-resistant synthetic resin member, such as a plastic member. The rotor 2o is made of a magnetic member such as ferrite, and has a predetermined number of magnetic poles provided at predetermined intervals on its circumferential surface.
保持部材２１の一端部２１ａはロータ２０から所定の長
さ軸方向に突出し、他端部２１ｂ（第６図）には穴２１
ｃが形成されている。また軸２２とロータ２０とは保持
部材２１で一体生成により固着され且つ互いに廻り止め
されている。軸受装置１３．１６の穴１３ａ、１６ａ内
には夫々スラストワッシャ２５．２６が嵌挿され、これ
らのスラストワッシャ２３．２５には回転軸２２が遊貫
している。One end 21a of the holding member 21 protrudes from the rotor 20 by a predetermined length in the axial direction, and the other end 21b (FIG. 6) is provided with a hole 21.
c is formed. Further, the shaft 22 and the rotor 20 are integrally fixed to each other by a holding member 21, and are prevented from rotating relative to each other. Thrust washers 25.26 are fitted into the holes 13a, 16a of the bearing device 13.16, respectively, and the rotating shaft 22 passes loosely through these thrust washers 23.25.
スラストワッシャ２３．２５との間にはコイルスプリン
グ２４が回転軸２２の外側に同心状に介在され、所定の
ばね力でロータ２０を矢印Ｃで示す回転軸２２の駆動側
の軸受装置１６に押圧する。A coil spring 24 is interposed concentrically with the thrust washer 23, 25 on the outside of the rotating shaft 22, and presses the rotor 20 with a predetermined spring force against the bearing device 16 on the drive side of the rotating shaft 22 as indicated by arrow C. do.
回転軸２２の駆動側端部２２ａには第４図、第５図及び
第７図に示すように所定の間隔で２つのストッパカラー
２７．２８が孔圧入嵌挿され、これらのストッパカラー
２７．２８との間にはウオームギヤ２９が回転軸２２に
回転自在に且つ軸方向に僅かの距離ｄだけ移動臼°在に
遊嵌されている。ウオームギヤ２９の端面２９ｄに軸孔
２９ｂと同心状をなして穿設された孔２９ｅ内にはスラ
ストワッシャ３０が配設され、このスラストワッシャ３
０には回転軸２２が遊貫している。このスラストワッシ
ャ３０とストッパカラー２８との間には穴２９ｅ内に嵌
挿され且つ回転軸２２と同心状をなしてコイルスプリン
グ３１が介在されている。このコイルスプリング３１ば
ウオームギヤ２９を矢印りで示す方向に押圧し、その端
面２９ｃをストッパカラー２７に所定の力で圧接する。As shown in FIGS. 4, 5, and 7, two stopper collars 27 and 28 are press-fitted into holes at a predetermined interval on the drive side end 22a of the rotating shaft 22, and these stopper collars 27. A worm gear 29 is loosely fitted between the rotary shaft 22 and the rotary shaft 28 so as to be rotatable and movable by a small distance d in the axial direction. A thrust washer 30 is disposed in a hole 29e formed in an end surface 29d of the worm gear 29 so as to be concentric with the shaft hole 29b.
0 has a rotating shaft 22 loosely passing through it. A coil spring 31 is interposed between the thrust washer 30 and the stopper collar 28, and is inserted into the hole 29e and is concentric with the rotating shaft 22. This coil spring 31 presses the worm gear 29 in the direction shown by the arrow, and presses its end surface 29c against the stopper collar 27 with a predetermined force.
この状態においてウオームギヤ２９の端面２９ｄとスト
ッパカラー２８とは僅かな間隔ｄで対向している。In this state, the end surface 29d of the worm gear 29 and the stopper collar 28 face each other with a small distance d.
かかるパルスモータ１０を組立る場合、第４図及び第５
図に示すように各ハウジング１１．１４内に且つ各磁極
の外側に励磁コイル１７．１８を装着し、ステータ１９
の一方の各磁極をハウジング１１の各磁極の間に夫々配
列装着する。次いでロータ２２の保持部材２１の穴２１
ｃ内且つ回転軸２２の端部２２ｂに、スラストワッシャ
２３及びスプリング２４を遊嵌した後当該軸端部２２ｂ
にスラストワッシャ２５を遊嵌し、ハウジング１１の軸
受装置１３（第６図）に回転軸２２の端部２２ｂを挿入
すると共に、ハウジング１１及びステータ１９内にロー
タ２０の略半分を挿入する。When assembling such a pulse motor 10, FIGS.
An excitation coil 17.18 is mounted within each housing 11.14 and outside each magnetic pole as shown, and the stator 19
One of the magnetic poles of the housing 11 is arranged and mounted between the magnetic poles of the housing 11, respectively. Next, the hole 21 of the holding member 21 of the rotor 22
After the thrust washer 23 and the spring 24 are loosely fitted into the end 22b of the rotating shaft 22 inside the shaft end 22b.
The thrust washer 25 is loosely fitted into the housing 11, the end 22b of the rotating shaft 22 is inserted into the bearing device 13 (FIG. 6) of the housing 11, and approximately half of the rotor 20 is inserted into the housing 11 and the stator 19.
次いでロータ２０の回転軸２２の端部２２ａにスラスト
ワッシャ２６を遊嵌した後当該軸端部２２ａをＩ＼ウジ
ング１４の軸受装置１６のに挿入すると共に、ノ＼ウジ
ング１４の各磁極の間にステータ１９の各磁極を配列し
、ハウジング１４及びステータ１９内にロータ２０の半
分を収納させてハウジング１１とステータ１９とハウジ
ング１４とを強固に固着する。Next, after loosely fitting the thrust washer 26 to the end 22a of the rotating shaft 22 of the rotor 20, the shaft end 22a is inserted into the bearing device 16 of the housing 14, and between the magnetic poles of the housing 14. The magnetic poles of the stator 19 are arranged, and half of the rotor 20 is housed within the housing 14 and stator 19, so that the housing 11, the stator 19, and the housing 14 are firmly fixed.
かかる状態において、ロータ２０は第４図に示すように
ハウジング１１．１４内に僅かな、空隙で回転自在に軸
支され、保持部材２１の端部２６ａは軸受装置１６の孔
１６ａ内に遊嵌し、且つその端面ばスプリング２４によ
るばね力でスラストワッシャ２６を介して軸受装置１６
の対向端面に圧接する。スラストワ・ノシャ２５も軸受
装置１３の対向端面に圧接する。In this state, the rotor 20 is rotatably supported within the housing 11.14 with a slight gap, as shown in FIG. In addition, the bearing device 16 is connected to the bearing device 16 via the thrust washer 26 by the spring force of the end spring 24.
Press against the opposite end surface of the The thrust stirrer 25 also comes into pressure contact with the opposite end surface of the bearing device 13.
かかるパルスモータ１０の回転軸２２の駆動側端部２２
ａに第７図に示すようにストッパワッシャ２７を圧入固
着した後ウオームギヤ２９を遊嵌し、穴２９ｅ内にスラ
ストワッシャ３０を遊嵌し且つ回転軸２２の端部２２ａ
を遊貫させる。次いで穴３７ｃ内にコイルスプリング３
１を遊嵌した後、回転軸２２の端部２２ａにストップカ
ラー２８を圧入固着する。これらの２つのストップワッ
シャ２７．２８、スラストワッシャ３０及びコイルスプ
リング３１とによりスリップ機構 。The drive side end 22 of the rotating shaft 22 of the pulse motor 10
As shown in FIG. 7, the stopper washer 27 is press-fitted and fixed, the worm gear 29 is loosely fitted into the hole 29e, the thrust washer 30 is loosely fitted into the hole 29e, and the end 22a of the rotating shaft 22 is
to be pervasive. Next, insert the coil spring 3 into the hole 37c.
1 is loosely fitted, a stop collar 28 is press-fitted and fixed to the end 22a of the rotating shaft 22. These two stop washers 27 and 28, the thrust washer 30, and the coil spring 31 form a slip mechanism.
を構成する。Configure.
このパルスモータ１０を第９図に示すようにノ＼ウジン
グ８にボルト４０．４１で固着する。このハウジング８
の軸受装置８ａ （第１０図）に指針の回転軸２の一端
部２ａ及びヘリカルギヤ３を互いに回転自在に装着し、
緩衝用の渦巻きばね４の一端部４ａを回転軸２に圧入嵌
合したストッパ９に固着し、他端部４ｂをヘリカルギヤ
３の端面に突設した突起部３Ｃに固着し、回転軸２とヘ
リカルギヤ３とを緩衝ばね４を介して係合する。This pulse motor 10 is fixed to the nozzing 8 with bolts 40 and 41 as shown in FIG. This housing 8
One end 2a of the rotating shaft 2 of the pointer and the helical gear 3 are mounted on the bearing device 8a (Fig. 10) so as to be rotatable with respect to each other.
One end 4a of the shock-absorbing spiral spring 4 is fixed to a stopper 9 press-fitted to the rotating shaft 2, and the other end 4b is fixed to a protrusion 3C protruding from the end surface of the helical gear 3, thereby connecting the rotating shaft 2 and the helical gear. 3 are engaged with each other via a buffer spring 4.
次いで保持板３５の孔３５（第１０図）、パネル３６の
孔３６ａに回転軸２の端部２ｂを挿通し、支持板３５に
パネル３６とハウジング８とをボルト４２．４３で螺着
すると共に、回転軸２の端部２ｂに指針１を固着する。Next, the end 2b of the rotating shaft 2 is inserted into the hole 35 of the holding plate 35 (FIG. 10) and the hole 36a of the panel 36, and the panel 36 and the housing 8 are screwed to the support plate 35 with bolts 42 and 43. , the pointer 1 is fixed to the end 2b of the rotating shaft 2.
このとき、へりカルギヤ３の歯３ａにウオームギヤ２９
の歯２９ａをスプリング２４のばね力により第７図の矢
印Ｃ方向に圧接、させる。このウオームギヤ２９とヘリ
カルギヤ３とにより減速機構を構成する。このようにし
て例えば電気式速度計を構成する。At this time, the worm gear 29 is attached to the tooth 3a of the helical gear 3.
The teeth 29a are pressed together in the direction of arrow C in FIG. 7 by the spring force of the spring 24. The worm gear 29 and the helical gear 3 constitute a speed reduction mechanism. In this way, for example, an electric speedometer is constructed.
上記構成において、通當状態においては第７図に示すよ
うにウオームギヤ２９はコイルスプリング３１によりそ
の端部２９ｃがストッパカラー２７に圧接され、穴２９
ｅの底面はスラストワッシャ３０及びコイルスプリング
３１を介してストッパカラー２８に圧接され、コイルス
プリング３１の摩擦力によりパルスモータ１０の回転軸
２２に係合されている。そして車速零即ち、停車状態に
おいては第８図に示すようにヘリカルギヤ３の突起部３
ｂがハウジング８のストッパ８ｂに当接係止され矢印Ｈ
方向への回転が禁止されると共に、指針１が車速零の位
置を指示する。In the above configuration, in the normal state, the worm gear 29 has its end 29c pressed against the stopper collar 27 by the coil spring 31, as shown in FIG.
The bottom surface of e is pressed against the stopper collar 28 via the thrust washer 30 and the coil spring 31, and is engaged with the rotating shaft 22 of the pulse motor 10 by the frictional force of the coil spring 31. When the vehicle speed is zero, that is, when the vehicle is stopped, the protrusion 3 of the helical gear 3 as shown in FIG.
b is abutted against the stopper 8b of the housing 8, and arrow H
Rotation in this direction is prohibited, and the pointer 1 indicates the position where the vehicle speed is zero.
車輌のスタート時に始動スイッチ（図示せず）を投入す
ると前述したように誤動作防止のため駆動回路（図示せ
ず）が初期リセットをかけて指針１を零位置方向にフル
スケール分強制的に回転させるべく、パルスモータ１０
を第８図の矢印Ｇ方向に逆回転させる。一方、へりカル
ギヤ３は前述したようにハウジング８のストッパ８ｂに
より前記零位置からの矢印Ｈ方向への回転が禁止されて
おり、ウオームギヤ２９が矢印Ｇ方向に回転しても回転
し得ない。When the start switch (not shown) is turned on when the vehicle is started, the drive circuit (not shown) performs an initial reset to prevent malfunctions, as described above, and forcibly rotates the pointer 1 by a full scale amount in the direction of the zero position. Therefore, the pulse motor 10
is reversely rotated in the direction of arrow G in FIG. On the other hand, as described above, the helical gear 3 is prohibited from rotating in the direction of arrow H from the zero position by the stopper 8b of the housing 8, and cannot rotate even if the worm gear 29 rotates in the direction of arrow G.
パルスモータ１０が強制的に逆回転され、ウオームギヤ
２９の歯２９ａ とヘリカルギヤ３の歯３ａとの間の圧
力が大きくなると、回転軸２２の回転に伴い第８図に示
すようにウオームギヤ２９がコイルスプリング３１のば
ね力に抗して当該コイルスプリング３１を圧縮して矢印
Ｃ方向に移動する。この結果ウオームギヤ２９の端面２
９ｃがストッパカラー２７から切離する。しかもウオー
ムギヤ２９の端面２９ｄとストッパカラー２８とも離隔
しており、従って、ウオームギヤ２９とパルスモーク１
０の回転軸２２とのコイルスプリング３１の摩擦力によ
る係合関係が解除され、ウオームギヤ２９が２つのスト
ッパカラー２７．２８即ち、回転軸２２に対してスリッ
プ可能となり、回転軸２２のみが回転する。When the pulse motor 10 is forcibly rotated in the reverse direction and the pressure between the teeth 29a of the worm gear 29 and the teeth 3a of the helical gear 3 increases, the worm gear 29 is rotated by the coil spring as the rotating shaft 22 rotates, as shown in FIG. The coil spring 31 is compressed against the spring force of 31 and moved in the direction of arrow C. As a result, the end face 2 of the worm gear 29
9c is separated from the stopper collar 27. Moreover, the end surface 29d of the worm gear 29 and the stopper collar 28 are also separated from each other, so that the worm gear 29 and the pulse smoke 1
The engagement relationship due to the frictional force of the coil spring 31 with the rotating shaft 22 of 0 is released, the worm gear 29 can slip against the two stopper collars 27 and 28, that is, the rotating shaft 22, and only the rotating shaft 22 rotates. .
パルスモータ１０は前記フルスケール分だけ逆回転され
た後停止する。しかしてウオームギヤ２９の歯２９ａが
へりカルギヤ３の歯３ａに乗り上げることがなく、ウオ
ームギヤ２９とヘリカルギヤ３とがロックすることはな
い。このようにして速度計の初期リセットが完了する。The pulse motor 10 is reversely rotated by the full scale and then stopped. Therefore, the teeth 29a of the worm gear 29 will not ride on the teeth 3a of the helical gear 3, and the worm gear 29 and the helical gear 3 will not be locked. In this way, the initial reset of the speedometer is completed.
車輌の発進に伴い車速に応じて図示しない駆動回路から
出力される駆動信号によりパルスモータ１０の回転軸２
２が第７図の矢印Ｅで示す正回転方向に駆動されると、
これに伴いヘルカルギヤ３が矢印Ｆ方向に駆動回転され
、この結果指針の回転軸２が緩衝ばね４（第８図、第９
図）を介してヘリカルギヤ３と同一方向に回転され、指
針１が前記零位置からフルスケール方向に回動される。When the vehicle starts, the rotation shaft 2 of the pulse motor 10 is activated by a drive signal output from a drive circuit (not shown) according to the vehicle speed.
2 is driven in the forward rotation direction shown by arrow E in FIG.
Along with this, the helcal gear 3 is driven and rotated in the direction of the arrow F, and as a result, the rotating shaft 2 of the pointer is rotated by the buffer spring 4 (Figs. 8 and 9).
(Fig.) in the same direction as the helical gear 3, and the pointer 1 is rotated from the zero position to the full scale direction.
パルスモータ１０は車速に応じて逐次回転駆動され、こ
れに応じて指針１が回動されて当該車速を指示する。The pulse motor 10 is rotated sequentially according to the vehicle speed, and the pointer 1 is rotated accordingly to indicate the vehicle speed.
尚、本実施例においては速度針に適用した場合ついて記
述したが、これに限るものではなくタコメータ等の他の
計器に適用しても良いことは勿論である。In this embodiment, the case where the present invention is applied to a speed needle has been described, but the present invention is not limited to this, and it goes without saying that the present invention may be applied to other instruments such as a tachometer.
以上説明したように本発明によれば、車速センサから出
力されるパルス信号に基づいてパルスモータを駆動し、
該パルスモータの回転を減速機構を介して指針に伝達し
当該指針を駆動する電気式速度針において、前記減速機
構を前記パルスモータの回転軸に遊嵌したウオームギヤ
と、該ウオームギヤと噛合し前記指針の回転軸に装着し
たへりカルギヤと、前記パルスモータの回転軸の正方向
の回転に対しては前記ウオームギヤを前記回転軸に係合
させ且つ前記回転軸の逆回転方向に所定の回転力以上の
回転力が加わったときには前記ウオームギヤを空転させ
るスリップ機構とにより構成したので、始動時に初期リ
セットをかけて前記パルスモータを指針零位置方向にフ
ルスケール分強制的に逆回転させた場合においても当該
強制逆回転時における前記ウオームギヤの前記ヘリカル
ギヤへの乗り上げによるロック状態の発生を防止するこ
とができ、常に速度計を正常に作動させることができる
。As explained above, according to the present invention, the pulse motor is driven based on the pulse signal output from the vehicle speed sensor,
In an electric speed hand that transmits the rotation of the pulse motor to a pointer via a deceleration mechanism to drive the pointer, the deceleration mechanism is loosely fitted into a worm gear on the rotating shaft of the pulse motor, and the worm gear meshes with the worm gear to drive the pointer. The helical gear attached to the rotating shaft of the pulse motor engages the worm gear with the rotating shaft when the rotating shaft of the pulse motor rotates in the forward direction, and applies a torque of more than a predetermined torque in the reverse rotational direction of the rotating shaft. Since the worm gear is configured with a slip mechanism that idles the worm gear when rotational force is applied, even if the pulse motor is forcibly rotated in the opposite direction by the full scale amount in the direction of the zero position of the pointer by applying an initial reset at the time of startup, the forcible rotation will be avoided. It is possible to prevent the occurrence of a locked state due to the worm gear riding on the helical gear during reverse rotation, and it is possible to always operate the speedometer normally.
第１図はパルスモータを使用した速度計の概略構成図、
第２図及び第３図は第１図の速度計の動作説明図、第４
図は本発明を適用したパルスモータの縦断面図、第５図
は第４図のパルスモータの組立斜視図、第６図は第４図
の要部拡大断面図、第７図は第４図に示す本発明に係る
減速機構の要部拡大断面図、第８図は第７図の動作説明
図、第９図は第４図に示すパルスモータを適用した速度
計の端面図、第１０図は第９図の矢印Ｘ−Ｘ断面図であ
る。
１・・・指針、２・・・回転軸、３・・・へりカルギヤ
、４・・・緩衝ばね、８・・・ハウシング、９・・・ス
トッパ、１０・・・パルスモータ、１１．１４・・・ハ
ウジング、１３．１６・・・軸受装置、１７．１８・・
・励磁コイル、１９・・・ステータ、２０・・・ロータ
、２２・・・回転軸、２３．２５．２６．３０・・・ス
ラストワッシャ、２３．３１・・・コイルスプリング、
２７．２８・・・ストッパカラー、２９・・・ウオーム
ギヤ、３５・・・保持板、３６・・・パネル、４０〜４
３・・・ボルト。
出願人 株式会社 本田ロック
代理人 弁理士 渡 部 敏 音
節２図
ｂ ８
詰Ｉ図
病３図
８７顯
篇８図
第９図
第１０図Figure 1 is a schematic diagram of a speedometer using a pulse motor.
Figures 2 and 3 are diagrams explaining the operation of the speedometer in Figure 1, and Figure 4.
The figure is a longitudinal sectional view of a pulse motor to which the present invention is applied, FIG. 5 is an assembled perspective view of the pulse motor of FIG. 4, FIG. 6 is an enlarged sectional view of the main part of FIG. 8 is an explanatory view of the operation of FIG. 7, FIG. 9 is an end view of the speedometer to which the pulse motor shown in FIG. 4 is applied, and FIG. 9 is a sectional view taken along arrow XX in FIG. DESCRIPTION OF SYMBOLS 1... Pointer, 2... Rotating shaft, 3... Helical gear, 4... Buffer spring, 8... Housing, 9... Stopper, 10... Pulse motor, 11.14. ...Housing, 13.16...Bearing device, 17.18...
- Excitation coil, 19... Stator, 20... Rotor, 22... Rotating shaft, 23.25.26.30... Thrust washer, 23.31... Coil spring,
27.28... Stopper collar, 29... Worm gear, 35... Holding plate, 36... Panel, 40-4
3...Bolt. Applicant Honda Lock Co., Ltd. Agent Patent Attorney Satoshi Watanabe Syllable 2 Figure b 8 Tsume I Diagram 3 Figure 87 Encyclopedia Figure 8 Figure 9 Figure 10
Claims (1)
ルスモータを駆動し、該パルスモータのｌｉｄ転を減速
機構を介して指針に伝達し当該指針を駆動する電気式速
度計において、前記減速機構を前記パルスモータの回転
軸に遊嵌したウオームギヤと、該ウオームギヤと噛合し
前記指針の回転軸に装着したヘリカルギヤと、前記パル
スモータの回転軸の一方向の回転に対しては当該回転軸
に前記ウオームギヤを係合させ且つ前記回転軸に他方向
に所定の回転力以上の回転力が加わったときには前記係
合を解除させるスリップ機構とにより構成したことを特
徴とする電気式速度計。 ２、前記スリップ機構は前記パルスモータの回転軸に圧
入され当該回転軸に遊嵌された前記ウオームギヤの端部
と僅かな間隔で対峙し且つ前記ウオームギヤの軸方向へ
の移動を規制する２つのストニッパカラーと、一方のス
トッパカラーと前記ウオームギヤの対向端面との間に介
在され当該ウオームギヤを他方のストッパカラーに圧接
させるスプリングとにより構成し、前記スプリングの摩
擦力を前記パルスモークトルクよりも小さく、指針駆動
トルクよりも大きく設定して前記回転軸に前記ウオーム
ギヤを係合させたことを特徴とする特許請求の範囲第１
項記載の電気式速度計。[Claims] 1. An electric speedometer that drives a pulse motor based on a pulse signal output from a vehicle speed sensor, transmits the lid rotation of the pulse motor to a pointer via a deceleration mechanism, and drives the pointer. , a worm gear in which the speed reduction mechanism is loosely fitted to the rotation shaft of the pulse motor, a helical gear meshed with the worm gear and attached to the rotation shaft of the pointer, and a rotation shaft of the pulse motor in one direction. The electric speed is characterized by comprising a slip mechanism that engages the worm gear with the rotating shaft and releases the engagement when a rotational force greater than a predetermined rotational force is applied to the rotating shaft in the other direction. Total. 2. The slip mechanism includes two struts that are press-fitted onto the rotating shaft of the pulse motor, facing the ends of the worm gear loosely fitted onto the rotating shaft at a small distance, and restricting movement of the worm gear in the axial direction. comprising a nipper collar and a spring interposed between one stopper collar and the opposing end surface of the worm gear to press the worm gear into contact with the other stopper collar, the frictional force of the spring being smaller than the pulse smoke torque; Claim 1, characterized in that the worm gear is engaged with the rotating shaft by setting the torque to be larger than the pointer driving torque.
Electric speedometer described in section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58041952A JPS59166870A (en) | 1983-03-14 | 1983-03-14 | Electric speedometer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58041952A JPS59166870A (en) | 1983-03-14 | 1983-03-14 | Electric speedometer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59166870A true JPS59166870A (en) | 1984-09-20 |
| JPH044551B2 JPH044551B2 (en) | 1992-01-28 |
Family
ID=12622532
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58041952A Granted JPS59166870A (en) | 1983-03-14 | 1983-03-14 | Electric speedometer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59166870A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0674685U (en) * | 1993-03-29 | 1994-10-21 | トクコン株式会社 | Gutter block that can also be used as a retaining wall |
| EP1557547A3 (en) * | 2004-01-24 | 2009-01-14 | Pierburg GmbH | Actuating device |
| JP2012253946A (en) * | 2011-06-03 | 2012-12-20 | Tokyo Parts Ind Co Ltd | Motor with deceleration mechanism |
| CN107206894A (en) * | 2015-03-04 | 2017-09-26 | 本田制锁有限公司 | Power transmission |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS51119462A (en) * | 1975-04-11 | 1976-10-20 | Toshiba Corp | Rotary device |
| JPS52156784U (en) * | 1976-05-25 | 1977-11-28 |
-
1983
- 1983-03-14 JP JP58041952A patent/JPS59166870A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS51119462A (en) * | 1975-04-11 | 1976-10-20 | Toshiba Corp | Rotary device |
| JPS52156784U (en) * | 1976-05-25 | 1977-11-28 |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0674685U (en) * | 1993-03-29 | 1994-10-21 | トクコン株式会社 | Gutter block that can also be used as a retaining wall |
| EP1557547A3 (en) * | 2004-01-24 | 2009-01-14 | Pierburg GmbH | Actuating device |
| JP2012253946A (en) * | 2011-06-03 | 2012-12-20 | Tokyo Parts Ind Co Ltd | Motor with deceleration mechanism |
| CN107206894A (en) * | 2015-03-04 | 2017-09-26 | 本田制锁有限公司 | Power transmission |
| US20180010683A1 (en) * | 2015-03-04 | 2018-01-11 | Honda Lock Mfg. Co., Ltd. | Power Transmission Device |
| US10480640B2 (en) * | 2015-03-04 | 2019-11-19 | Honda Lock Mfg. Co., Ltd. | Power transmission device |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH044551B2 (en) | 1992-01-28 |
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