JPH02103102U - - Google Patents
Info
- Publication number
- JPH02103102U JPH02103102U JP1242189U JP1242189U JPH02103102U JP H02103102 U JPH02103102 U JP H02103102U JP 1242189 U JP1242189 U JP 1242189U JP 1242189 U JP1242189 U JP 1242189U JP H02103102 U JPH02103102 U JP H02103102U
- Authority
- JP
- Japan
- Prior art keywords
- sprocket
- crankshaft
- valve
- crank sprocket
- dohc
- 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.)
- Pending
Links
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
Landscapes
- Valve-Gear Or Valve Arrangements (AREA)
- Gear Transmission (AREA)
Description
第１〜６図は本考案の第１実施例としてのＤＯ
ＨＣエンジン用バルブ駆動機構を示すもので、第
１図はその模式的な正面図、第２図は第１図の
部拡大図、第３図はそのリングギヤの位置決め機
構を示す要部正面図、第４図は第３図の―矢
視断面図、第５図はそのリングギヤの位置決め機
構の変形例を示す要部正面図、第６図は第５図の
―矢視断面図であり、第７〜９図は本考案の
第２実施例としてのＤＯＨＣエンジン用バルブ駆
動機構を示すもので、第７図はその模式的な正面
図、第８図はその要部を拡大して示す正面図、第
９図は第８図の―矢視断面図であり、第１０
，１１図は本考案の第３実施例としてのＤＯＨＣ
エンジン用バルブ駆動機構を示すもので、第１０
図はその要部を示す正面図、第１１図は第１０図
の―矢視断面図であり、第１２〜１４図
は本考案の第４実施例としてのＤＯＨＣエンジン
用バルブ駆動機構を示すもので、第１２図はその
要部を示す縦断面図、第１３図は第１２図の
―矢視断面図、第１４図はその変形例を第１
３図に対応させて示す断面図であり、第１５，１
６図は従来のＤＯＨＣエンジン用バルブ駆動機構
を示すもので、第１５図はその要部を示す斜視図
、第１６図はその正面図である。
１……排気バルブ側カムシヤフト、２……吸気
バルブ側カムシヤフト、３Ａ，４Ａ……カムスプ
ロケツト、５……タイミングベルト、６……クラ
ンクシヤフト、８……排気バルブ駆動用カム、９
……吸気バルブ駆動用カム、１０……排気バルブ
、１１……吸気バルブ、１２Ａ……テンシヨンプ
ーリ、１５……小歯車、１６……リングギヤ、１
６ａ……内歯歯車、１６ｂ……外歯歯車（クラン
クプロケツト）、１７……位置決め用アイドラ歯
車、１８……端板、１９……カバー、２０……ナ
ツト、２１ａ，２１ｂ……ガイド板、２２，２２
Ａ……小歯車、２３，２３Ａ……１／２減速スプ
ロケツト、２３ａ……内歯歯車、２３ｂ……外歯
歯車（クランクスプロケツト）、２３ｃ……外歯
歯車、２３ｄ……ピン、２３ｅ……軸受、２４，
２４Ａ……オイルポンプ、２４ａ……カバー、２
４ｂ……吸込口、２４ｃ……吐出口、２４ｄ……
ガイド部材、２４ｅ……吸込口、２４ｆ……吐出
口、２５……プーリ、２６……補機駆動用ベルト
、２７……オイルパン、Ｅ……エンジン、Ｒ１，
Ｒ２，Ｒ３……減速歯車機構。
1 to 6 are DOs as the first embodiment of the present invention.
Fig. 1 is a schematic front view of the valve drive mechanism for an HC engine, Fig. 2 is an enlarged view of a portion of Fig. 1, and Fig. 3 is a front view of main parts showing the ring gear positioning mechanism. 4 is a cross-sectional view taken in the direction indicated by the - arrow in FIG. 3, FIG. Figures 7 to 9 show a valve drive mechanism for a DOHC engine as a second embodiment of the present invention, with Figure 7 being a schematic front view thereof, and Figure 8 being an enlarged front view showing its main parts. , FIG. 9 is a sectional view taken along the - arrow in FIG.
, 11 shows a DOHC as the third embodiment of the present invention.
This shows the valve drive mechanism for engines, and the 10th
The figure is a front view showing the main parts, FIG. 11 is a sectional view taken along the - arrow in FIG. 10, and FIGS. 12 to 14 show a valve drive mechanism for a DOHC engine as a fourth embodiment of the present invention Fig. 12 is a longitudinal cross-sectional view showing the main part, Fig. 13 is a cross-sectional view taken along the - arrow in Fig. 12, and Fig. 14 is a first modification thereof.
3 is a sectional view corresponding to FIG.
FIG. 6 shows a conventional valve drive mechanism for a DOHC engine, FIG. 15 is a perspective view showing the main parts thereof, and FIG. 16 is a front view thereof. 1... Exhaust valve side camshaft, 2... Intake valve side camshaft, 3A, 4A... Cam sprocket, 5... Timing belt, 6... Crankshaft, 8... Exhaust valve drive cam, 9
... Intake valve driving cam, 10 ... Exhaust valve, 11 ... Intake valve, 12A ... Tension pulley, 15 ... Small gear, 16 ... Ring gear, 1
6a... Internal gear, 16b... External gear (crank socket), 17... Positioning idler gear, 18... End plate, 19... Cover, 20... Nut, 21a, 21b... Guide plate , 22, 22
A... Small gear, 23, 23A... 1/2 reduction sprocket, 23a... Internal gear, 23b... External gear (crank sprocket), 23c... External gear, 23d... Pin, 23e... ...Bearing, 24,
24A...Oil pump, 24a...Cover, 2
4b...Suction port, 24c...Discharge port, 24d...
Guide member, 24e...Suction port, 24f...Discharge port, 25...Pulley, 26...Auxiliary drive belt, 27...Oil pan, E...Engine, R1 ,
R2 , R3 ...Reduction gear mechanism.
Claims (1)
ブを駆動すべく設けられた一対のカムシヤフトと
、これらの各カムシヤフトに取り付けられたカム
スプロケツトと、上記ＤＯＨＣエンジンのクラン
クシヤフト側に取り付けられたクランクスプロケ
ツトと、上記のカムスプロケツトおよびクランク
スプロケツトに巻回されるタイミングベルトもし
くはタイミングチエーンとをそなえ、これらのク
ランクスプロケツト、タイミングベルトもしくは
タイミングチエーン、カムスプロケツトを介して
上記クランクシヤフトの動力を上記の各カムシヤ
フトへ伝達し上記の排気バルブおよび吸気バルブ
を駆動するＤＯＨＣエンジン用バルブ駆動機構に
おいて、上記のクランクシヤフトとクランクスプ
ロケツトとの間に、上記クランクシヤフトの回転
を減速して上記クランクスプロケツトへ伝達する
減速歯車機構がそなえられたことを特徴とする、
ＤＯＨＣエンジン用バルブ駆動機構。 A pair of camshafts provided to drive the exhaust valve and intake valve of the DOHC engine, a cam sprocket attached to each of these camshafts, a crank sprocket attached to the crankshaft side of the DOHC engine, and the above-mentioned It is equipped with a cam sprocket and a timing belt or a timing chain wound around the crank sprocket, and transmits the power of the crankshaft to each of the camshafts via the crank sprocket, the timing belt or timing chain, and the cam sprocket. In the valve drive mechanism for a DOHC engine that drives the above exhaust valve and intake valve, a reduction gear mechanism is provided between the above crankshaft and the crank sprocket to reduce the rotation of the above crankshaft and transmit it to the above crank sprocket. It is characterized by having
Valve drive mechanism for DOHC engines.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1242189U JPH02103102U (en) | 1989-02-04 | 1989-02-04 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1242189U JPH02103102U (en) | 1989-02-04 | 1989-02-04 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02103102U true JPH02103102U (en) | 1990-08-16 |
Family
ID=31221851
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1242189U Pending JPH02103102U (en) | 1989-02-04 | 1989-02-04 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02103102U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2017155939A (en) * | 2017-05-17 | 2017-09-07 | 株式会社リコー | Drive transmission device, process unit with drive transmission device and image forming device |
-
1989
- 1989-02-04 JP JP1242189U patent/JPH02103102U/ja active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2017155939A (en) * | 2017-05-17 | 2017-09-07 | 株式会社リコー | Drive transmission device, process unit with drive transmission device and image forming device |
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