JPS6358246B2 - - Google Patents
Info
- Publication number
- JPS6358246B2 JPS6358246B2 JP2464981A JP2464981A JPS6358246B2 JP S6358246 B2 JPS6358246 B2 JP S6358246B2 JP 2464981 A JP2464981 A JP 2464981A JP 2464981 A JP2464981 A JP 2464981A JP S6358246 B2 JPS6358246 B2 JP S6358246B2
- Authority
- JP
- Japan
- Prior art keywords
- arm member
- transmission band
- tension
- tensioner
- support frame
- 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.)
- Expired
Links
- 230000005540 biological transmission Effects 0.000 claims description 36
- 238000002485 combustion reaction Methods 0.000 claims description 5
- 230000000452 restraining effect Effects 0.000 description 2
- 239000004809 Teflon Substances 0.000 description 1
- 229920006362 Teflon® Polymers 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 239000013013 elastic material Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/02—Valve drive
- F01L1/024—Belt drive
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/02—Valve drive
- F01L1/022—Chain drive
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/02—Valve drive
- F01L1/04—Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/02—Valve drive
- F01L1/04—Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
- F01L1/047—Camshafts
- F01L1/053—Camshafts overhead type
- F01L2001/0537—Double overhead camshafts [DOHC]
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B2275/00—Other engines, components or details, not provided for in other groups of this subclass
- F02B2275/08—Endless member is a chain
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B2275/00—Other engines, components or details, not provided for in other groups of this subclass
- F02B2275/18—DOHC [Double overhead camshaft]
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B75/00—Other engines
- F02B75/16—Engines characterised by number of cylinders, e.g. single-cylinder engines
- F02B75/18—Multi-cylinder engines
- F02B75/22—Multi-cylinder engines with cylinders in V, fan, or star arrangement
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)
- Valve-Gear Or Valve Arrangements (AREA)
Description
【発明の詳細な説明】
本発明は内燃機関において、吸、排気弁を所定
のサイクルにしたがつて開閉作動する動弁カム軸
の駆動用伝動帯の緊張装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a tensioning device for a drive transmission band of a valve drive camshaft that opens and closes intake and exhaust valves according to a predetermined cycle in an internal combustion engine.
一般に前記動弁カム軸を駆動する手段として、
その動弁カム軸を無端状チエン等の伝動帯を介し
てクランク軸に連動させて駆動するようにしたも
のでは、伝動帯を、一定の張力をもつて緊張さ
せ、かつ伝動帯に永久的な伸びが生じたときは、
その伸びを吸収して伝動帯の張力を自動的に一定
に調整するような緊張装置を付設してクランク軸
の回転力を効率よく動弁カム軸に伝達するように
する必要があるが、本発明はコンパクトで部品点
数が少なく、構造簡単に形成することができ、し
かも作動の確実な前記緊張装置を提供することを
主な目的とするものである。 Generally, as a means for driving the valve train camshaft,
In systems where the valve drive camshaft is driven in conjunction with the crankshaft via a transmission band such as an endless chain, the transmission band is tensioned with a constant tension and the transmission band is permanently attached. When elongation occurs,
It is necessary to install a tensioning device that absorbs this elongation and automatically adjusts the tension of the transmission band to a constant level in order to efficiently transmit the rotational force of the crankshaft to the valve drive camshaft. The main object of the invention is to provide a tensioning device that is compact, has a small number of parts, can be formed simply in structure, and is reliable in operation.
以下、図面によりDOHC式動弁機構を有する
Ｖ型内燃機関に実施した場合の実施例について説
明すると、前記内燃機関は２つのシリンダ部C1，
C2が互いにＶ型に配置され、それらのシリンダ
部C1，C2の各中心線L1−L1およびL2−L2の交叉
部上にクランク軸１が配設され、このクランク軸
１は、第１図において反時計方向に回転される。
各シリンダ部C1，C2は通常のようにシリンダブ
ロツク２，２上に、シリンダヘツド３，３を重合
固着し、さらにそれらシリンダヘツド３，３上に
ヘツドカバー４，４が被着される。 Hereinafter, an example will be described in which a V-type internal combustion engine having a DOHC valve mechanism is implemented with reference to the drawings .
C 2 are arranged in a V-shape with each other, and a crankshaft 1 is arranged on the intersection of center lines L 1 -L 1 and L 2 -L 2 of these cylinder parts C 1 and C 2 , and this crankshaft 1 is rotated counterclockwise in FIG.
Each cylinder part C 1 , C 2 has a cylinder head 3 , 3 fixedly attached to the cylinder block 2 , 2 in the usual manner, and a head cover 4 , 4 is attached on the cylinder head 3 , 3 .
各シリンダヘツド３，３にはクランク軸１と平
行に吸、排気用の一対の動弁カム軸５，６；５，
６が回転自在に支承され、これらの動弁カム軸
５，６；５，６には、吸、排気弁７，８；７，８
の開閉用カム９，１０；９，１０が一体に設けら
れる。 Each cylinder head 3, 3 has a pair of valve drive camshafts 5, 6;
6 is rotatably supported, and these valve drive camshafts 5, 6; 5, 6 have intake and exhaust valves 7, 8;
Opening/closing cams 9, 10; 9, 10 are integrally provided.
クランク軸１には２個の駆動スプロケツト１
１，１１が並列して固着され、また各一対のカム
軸５，６；５，６には、それぞれ被動スプロケツ
ト１３，１４；１３，１４が固着され、それら駆
動スプロケツト１１，１１と被動スプロケツト１
３，１４；１３，１４間には無端状の伝動チエン
１５，１５が懸回され、クランク軸１の回転は、
各駆動スプロケツト１１より伝動チエン１５およ
び被動スプロケツト１３，１４を介して動弁カム
軸５，６に伝達され、吸、排気弁７，８を開閉駆
動できるようになつている。 There are two drive sprockets 1 on the crankshaft 1.
1, 11 are fixed in parallel, and driven sprockets 13, 14; 13, 14 are fixed to each pair of camshafts 5, 6; 5, 6, respectively.
3, 14; An endless transmission chain 15, 15 is suspended between 13, 14, and the rotation of the crankshaft 1 is
The power is transmitted from each drive sprocket 11 to valve drive camshafts 5 and 6 via a transmission chain 15 and driven sprockets 13 and 14, so that intake and exhaust valves 7 and 8 can be opened and closed.
各伝動チエン１５の弛み側の外側には、弓形に
湾曲するテンシヨナ本体１６が配設されそのテン
シヨナ本体１６の固定端１７は、内燃機関本体
に、支持軸１９を以て回動自在に支持されてお
り、またその可動端１８は、後述するアーム部材
２１の自由端にピボツトピン２０を以て回動自在
に連結されている。テンシヨナ本体１６の中間部
背面側には、横断面コ字状の案内部材２２が固着
され、この案内部材２２は伝動チエン１５の両側
を囲むようにしてそれが左右に振れないように案
内する。テンシヨナ本体１６の前面、すなわち伝
動チエン１５への接触面にはテフロン材が貼着さ
れており、耐摩性と滑り性とを高めるようになつ
ている。 An arcuately curved tensioner body 16 is disposed on the outside of the slack side of each transmission chain 15, and a fixed end 17 of the tensioner body 16 is rotatably supported by the internal combustion engine body via a support shaft 19. , and its movable end 18 is rotatably connected to the free end of an arm member 21, which will be described later, via a pivot pin 20. A guide member 22 having a U-shaped cross section is fixed to the back side of the middle part of the tensioner main body 16, and the guide member 22 surrounds both sides of the transmission chain 15 to guide it so that it does not swing from side to side. A Teflon material is attached to the front surface of the tensioner main body 16, that is, the surface that contacts the transmission chain 15, to improve wear resistance and slipperiness.
前記無端状伝動チエン１５の内側において、ク
ランク軸１と、一対の動弁カム軸５，６間には、
前記テンシヨナ本体１６を、伝動チエン１５に向
けて弾発させ、該チエン１５に一定の張力を与
え、かつ伝動チエン１５に伸びが発生した場合に
も常にその張力を一定に保つように自動的に調整
するようにした装置が配設されている。次にこの
装置の構成を説明すると、第２図に明瞭に示すよ
うにシリンダヘツド３，３にはそれぞれ被動スプ
ロケツト１３，１４間において４本の下部支柱２
４，２４…が四角形の各頂点において、一体的に
立設されており、これらの支柱２４，２４…の上
下方向に長く形成した支持枠Ｆが固着ボルト２
５，２５…によつて剛直に固着されている。前記
支持枠Ｆは下部支柱２４，２４…より被動スプロ
ケツト１３，１４間の空隙部Ｓに向つて上方にの
びる上部支持枠２６と、下部支柱２４，２４…の
頂部よりも下方にのびる下部支持枠２７とを一体
に結合して構成されており、上部支持枠２６の上
端には、さらに断面チヤンネル型の補助枠２８が
その上方より嵌合され、この補助枠２８は、シリ
ンダヘツド３より一体に延出される２本の上部支
柱２９，２９上に固定ボルト３０，３０によつて
堅固に固着される。前記上部支柱２９，２９は第
２図に明瞭に示すように一対の被動スプロケツト
１３，１４間において前記４本の下部支柱２４，
２４…の外側に配設される。上部支持枠２６の上
端にはく字状に湾曲される、前記アーム部材２１
の基端が揺動自在に枢軸３１をもつて軸支され、
このアーム部材２１の自由端には前述したように
テンシヨナ本体１６の可動端１８がピボツトピン
２０をもつて連結される。アーム部材２１は横断
面コ字状に形成されており、その内部に、一方の
被動スプロケツト１３の外周一部が進入してい
る。下部支持枠２７の下端には、揺動片３２が枢
軸３３をもつて揺動自在に枢支されており、この
揺動片３２の底面部３２ａには、係止孔３４が穿
設されており、この係止孔３４には、アーム部材
２１の中間部に枢軸３５をもつて枢支されるロツ
ド３６の自由端が緩通されている。またアーム部
材２１の中間部と揺動片３２間には、緊張ばね３
７が張架されており、この緊張ばね３７の引張力
は、第１図においてアーム部材２１を枢軸３１回
りに、また揺動片３２を枢軸３３回りにそれぞれ
時計方向に揺動するように偏倚させ、アーム部材
２１を介してテンシヨナ本体１６を伝動チエン１
５の弛み側に圧接させ、また揺動片３２の時計方
向の回動は係止孔３４の対角エツジe1，e2を、前
記ロツド３６の自由端に係合してロツド３６の揺
動片３２に対する抜き方向の移動、すなわち第１
Ａ図矢印イ方向の移動を抑止するように作用す
る。 Inside the endless transmission chain 15, between the crankshaft 1 and the pair of valve drive camshafts 5 and 6,
The tensioner main body 16 is elastically directed toward the transmission chain 15 to apply a constant tension to the chain 15, and even if the transmission chain 15 stretches, the tension is automatically kept constant. A device for adjustment is provided. Next, to explain the structure of this device, as clearly shown in FIG.
4, 24... are integrally erected at each vertex of the rectangle, and a support frame F formed long in the vertical direction of these columns 24, 24... is attached to the fixing bolt 2.
5, 25... are fixed rigidly. The support frame F includes an upper support frame 26 extending upward from the lower supports 24, 24... toward the gap S between the driven sprockets 13, 14, and a lower support frame extending downward from the tops of the lower supports 24, 24... An auxiliary frame 28 having a channel-shaped cross section is fitted from above to the upper end of the upper support frame 26, and this auxiliary frame 28 is integrally connected to the cylinder head 3. It is firmly fixed onto the two extending upper struts 29, 29 by fixing bolts 30, 30. As clearly shown in FIG. 2, the upper struts 29, 29 connect the four lower struts 24,
24... is arranged outside. The arm member 21 is curved in a dogleg shape at the upper end of the upper support frame 26.
The base end is swingably supported on a pivot 31,
As described above, the movable end 18 of the tensioner body 16 is connected to the free end of this arm member 21 with the pivot pin 20. The arm member 21 has a U-shaped cross section, and a portion of the outer periphery of one driven sprocket 13 enters into the arm member 21 . A swinging piece 32 is swingably supported at the lower end of the lower support frame 27 with a pivot 33, and a locking hole 34 is bored in the bottom surface 32a of the swinging piece 32. The free end of a rod 36, which is pivotally supported at the intermediate portion of the arm member 21 with a pivot 35, is loosely passed through the locking hole 34. Further, a tension spring 3 is provided between the intermediate portion of the arm member 21 and the swinging piece 32.
7 is tensioned, and the tensile force of this tension spring 37 biases the arm member 21 and the rocking piece 32 clockwise around the pivot shaft 31 and around the pivot shaft 33, respectively, in FIG. and connect the tensioner main body 16 to the transmission chain 1 via the arm member 21.
The clockwise rotation of the rocking piece 32 engages the diagonal edges e 1 and e 2 of the locking hole 34 with the free end of the rod 36, causing the rod 36 to swing. Movement in the pulling direction relative to the moving piece 32, that is, the first
It acts to inhibit movement in the direction of arrow A in Figure A.
各伝動チエン１５，１５の張り側には、弓形に
形成されるスライダ３８が配設され、そのスライ
ダ３８のクランク軸寄りの基部には、第４図に示
すようにボス３９が固着され、このボス３９が機
関本体に片持状に支持される案内ピン４２に揺動
自在に支持される。またスライダ３８の、被動ス
プロケツト１４寄りの中間部背面には弾性材より
なる抑え片４０が固着され、スライダ３８はこの
抑え片４０を介して機関本体に係合される。スラ
イダ３８は支持ピン４２を支点として揺動し、伝
動チエン１５の張り側が所定の軌跡に沿つて移動
するように案内する。機関本体の中間部には横断
面コ字状の案内片４１が設けられ、この案内片４
１は伝動チエン１５を囲んでそれが横振れしない
ように案内する。 A bow-shaped slider 38 is provided on the tension side of each transmission chain 15, 15, and a boss 39 is fixed to the base of the slider 38 near the crankshaft as shown in FIG. The boss 39 is swingably supported by a guide pin 42 supported in a cantilever manner on the engine body. Further, a restraining piece 40 made of an elastic material is fixed to the back surface of the intermediate portion of the slider 38 near the driven sprocket 14, and the slider 38 is engaged with the engine body via this restraining piece 40. The slider 38 swings about the support pin 42 and guides the tension side of the transmission chain 15 to move along a predetermined trajectory. A guide piece 41 having a U-shaped cross section is provided in the middle part of the engine body.
1 surrounds the transmission chain 15 and guides it to prevent it from swinging laterally.
次に本発明の実施例の作用について説明する
と、いま内燃機関が運転されると、クランク軸１
は第１図反時計方向に回転され、その回転は駆動
スプロケツト１１，１１、伝動チエン１５，１５
および被動スプロケツト１３，１４；１３，１４
を介してカム軸５，６；５，６に伝達され動弁機
構を駆動する。その際、緊張ばね３７の引張力は
アーム部材２１を介してテンシヨナ本体１６を、
伝動チエン１５の弛み側に弾発圧接して、伝動チ
エン１５に所定の張力を附与する。ところで伝動
チエン１５に多少の伸びが生じたときは、その伸
び量に応じて緊張ばね３７の引張力はアーム部材
２１を第１図時計方向に揺動し、これによりロツ
ド３６には第１Ａ図矢印ロ方向への押圧力が生
じ、揺動片３２は瞬間的に緊張ばね３７による時
計方向の附勢力が解かれるので、ロツド３６は矢
印ロ方向へ移動し、アーム部材２１を介して該テ
ンシヨン本体１６を伝動チエン１５の伸びに追従
するように、該伝動チエン１５側に移動させ、そ
の張力を自動的に一定になるように調整する。 Next, to explain the operation of the embodiment of the present invention, when the internal combustion engine is operated, the crankshaft 1
is rotated counterclockwise in FIG.
and driven sprockets 13, 14; 13, 14
are transmitted to the camshafts 5, 6; 5, 6 to drive the valve mechanism. At this time, the tensile force of the tension spring 37 is applied to the tensioner body 16 via the arm member 21.
A predetermined tension is applied to the transmission chain 15 by elastic pressure contact with the slack side of the transmission chain 15. By the way, when the transmission chain 15 stretches to some extent, the tensile force of the tension spring 37 swings the arm member 21 clockwise in FIG. A pressing force is generated in the direction of arrow B, and the clockwise biasing force of the tension spring 37 is momentarily released on the swinging piece 32, so that the rod 36 moves in the direction of arrow B, and the tension is released via the arm member 21. The main body 16 is moved toward the transmission chain 15 so as to follow the expansion of the transmission chain 15, and its tension is automatically adjusted to be constant.
以上のように本発明によれば、無端状伝動帯内
に設けた支持枠に、アーム部材を揺動自在に枢支
し、このアーム部材の自由端にテンシヨナ本体の
可動端を連結し、前記アーム部材の中間部に連結
した緊張ばねによつてテンシヨナ本体に、伝動帯
への緊張力を与えるようにしたので、緊張ばねの
比較的少ない変位量によつてテンシヨナ本体の可
動端の移動ストロークを増幅させることができ、
装置本体をコンパクトに形成することができると
ともにテンシヨナ本体に大きなテンシヨンストロ
ークを与えることができ、伝動帯に伸びが生じて
も常に所定の緊張力を与えることができる。しか
もテンシヨナ本体の作動部材、すなわちアーム部
材、緊張ばね等を、伝動帯の内側に設けたので、
伝動帯外への突出部が少なく、全体をコンパクト
に形成することができ、その結果機関本体自体の
コンパクト化を図ることができる。 As described above, according to the present invention, the arm member is swingably supported on the support frame provided in the endless transmission band, the movable end of the tensioner main body is connected to the free end of the arm member, and the movable end of the tensioner main body is connected to the free end of the arm member. Since the tension spring connected to the intermediate part of the arm member applies tension to the transmission band on the tensioner body, the movement stroke of the movable end of the tensioner body can be controlled by a relatively small amount of displacement of the tension spring. can be amplified,
The device main body can be formed compactly, and a large tension stroke can be applied to the tensioner main body, and even if the transmission band stretches, a predetermined tension force can always be applied. Moreover, since the operating members of the tensioner body, that is, the arm members, tension springs, etc., are provided inside the transmission band,
There are few protruding parts to the outside of the transmission band, and the whole can be formed compactly, and as a result, the engine main body itself can be made compact.
さらに前記緊張ばねは、テンシヨナ本体を伝動
帯に向けて弾発させ、該帯に一定の張力を与える
ための張力附与部材と、伝動帯に伸びが発生した
場合にその伸びを吸収して前記張力を一定にする
ように自動的に調整する自動張力調整部材とに兼
用されるので、部分点数を少なくして構造が簡素
化され、廉価に提供し得る。 Furthermore, the tension spring includes a tension imparting member for springing the tensioner body toward the transmission band and applying a constant tension to the band, and a tension imparting member for elastically applying a certain tension to the transmission band, and a tension applying member for absorbing the elongation when the transmission band elongates. Since it is also used as an automatic tension adjustment member that automatically adjusts the tension to be constant, the number of parts is reduced, the structure is simplified, and it can be provided at a low cost.
第１図は本発明装置の正面図、第１Ａ図は第１
図の一部拡大図、第２図は第１図−線横断面
図、第３図は、第１図−線拡大断面図、第４
図は第１図−線断面図である。
Ｆ……支持枠、１……クランク軸、１５……伝
動チエン、１６……テンシヨナ本体、１８……可
動端、２１……アーム部材、３２……揺動片、３
４……係止孔、３６……ロツド、３７…緊張ば
ね。
FIG. 1 is a front view of the device of the present invention, and FIG. 1A is a front view of the device of the present invention.
Figure 2 is a cross-sectional view taken along the line in Figure 1; Figure 3 is an enlarged cross-sectional view taken along the line in Figure 1;
The figure is a sectional view taken along the line of FIG. F... Support frame, 1... Crankshaft, 15... Transmission chain, 16... Tensioner body, 18... Movable end, 21... Arm member, 32... Rocking piece, 3
4... Locking hole, 36... Rod, 37... Tension spring.
Claims (1)
状伝動帯の緊張装置において、前記伝動帯の内側
に固定される支持枠にアーム部材の一端を回動自
在に軸支し、このアーム部材の自由端に、前記伝
動帯の弛み側外面に揺動可能に当接されるテンシ
ヨナ本体の可動端を枢着し、また前記アーム部材
の中間部に一端を連結される緊張ばねの他端を、
前記支持枠に軸支される揺動片に連結して前記ア
ーム部材と揺動片とをそれぞれ一方向に揺動する
ように偏倚させ、さらに前記アーム部材に一端を
枢支されるロツドの自由端を、前記揺動片に穿設
した係止孔に緩通させ、前記緊張ばねの引張力に
よりアーム部材を介してテンシヨナ本体を伝動帯
に弾発させるとともにロツドと係止孔とを互いに
係合させ、前記アーム部材の戻り方向への揺動を
抑止するようにした内燃機関における動弁カム駆
動用伝動帯の緊張装置。1. In a tensioning device for an endless transmission band suspended between a crankshaft and a valve camshaft, one end of an arm member is rotatably supported on a support frame fixed to the inside of the transmission band, and the arm A movable end of a tensioner main body, which swingably abuts on the slack side outer surface of the transmission band, is pivotally connected to the free end of the member, and the other end of a tension spring has one end connected to the intermediate portion of the arm member. of,
A rod that is connected to a swinging piece pivotally supported by the support frame to bias the arm member and the swinging piece so as to swing in one direction, and further has one end pivotally supported by the arm member. The end is loosely passed through a locking hole drilled in the rocking piece, and the tensile force of the tension spring causes the tensioner body to spring against the transmission band via the arm member, and the rod and the locking hole are locked together. A tensioning device for a transmission band for driving a valve train cam in an internal combustion engine, wherein the arm member is restrained from swinging in a return direction.
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2464981A JPS57140507A (en) | 1981-02-20 | 1981-02-20 | Tensioner of transmission belt for dynamic valve cam shaft driving in internal combustion engine |
| FR8202580A FR2500559B1 (en) | 1981-02-20 | 1982-02-17 | DEVICE FOR TENSIONING A TIMING CHAIN OF AN INTERNAL COMBUSTION ENGINE |
| US06/350,068 US4480603A (en) | 1981-02-20 | 1982-02-18 | Chain tightening mechanism for DOHC engine |
| DE19823206020 DE3206020A1 (en) | 1981-02-20 | 1982-02-19 | COMBUSTION ENGINE |
| CA000396654A CA1179167A (en) | 1981-02-20 | 1982-02-19 | Tensioning mechanism for transmission belt for driving valve actuating cam shaft of internal combustion engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2464981A JPS57140507A (en) | 1981-02-20 | 1981-02-20 | Tensioner of transmission belt for dynamic valve cam shaft driving in internal combustion engine |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13058281A Division JPS57140953A (en) | 1981-08-19 | 1981-08-19 | Transmission chain tensioning device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57140507A JPS57140507A (en) | 1982-08-31 |
| JPS6358246B2 true JPS6358246B2 (en) | 1988-11-15 |
Family
ID=12143983
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2464981A Granted JPS57140507A (en) | 1981-02-20 | 1981-02-20 | Tensioner of transmission belt for dynamic valve cam shaft driving in internal combustion engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57140507A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6012748U (en) * | 1983-07-06 | 1985-01-28 | 本田技研工業株式会社 | Tensioner device with automatic tension adjustment |
-
1981
- 1981-02-20 JP JP2464981A patent/JPS57140507A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS57140507A (en) | 1982-08-31 |
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