JPH0535231Y2 - - Google Patents
Info
- Publication number
- JPH0535231Y2 JPH0535231Y2 JP1987019045U JP1904587U JPH0535231Y2 JP H0535231 Y2 JPH0535231 Y2 JP H0535231Y2 JP 1987019045 U JP1987019045 U JP 1987019045U JP 1904587 U JP1904587 U JP 1904587U JP H0535231 Y2 JPH0535231 Y2 JP H0535231Y2
- Authority
- JP
- Japan
- Prior art keywords
- sprocket
- tooth
- buffer
- chain
- intermediate layer
- 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 - Lifetime
Links
- 239000000872 buffer Substances 0.000 claims description 43
- 239000002184 metal Substances 0.000 claims description 16
- 229910052751 metal Inorganic materials 0.000 claims description 16
- 239000013013 elastic material Substances 0.000 claims description 4
- 230000035939 shock Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 230000002093 peripheral effect Effects 0.000 description 3
- 239000006096 absorbing agent Substances 0.000 description 2
- 238000013016 damping Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 230000007935 neutral effect Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 210000004268 dentin Anatomy 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 229920003225 polyurethane elastomer Polymers 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 229920003051 synthetic elastomer Polymers 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- 239000005061 synthetic rubber Substances 0.000 description 1
- 230000003313 weakening effect Effects 0.000 description 1
Description
【考案の詳細な説明】
［産業上の利用分野］
この考案は、弾性体からなる中間層を一対の金
属プレートにより挟持し、かつ中間層の一部を歯
面に突出させて緩衝部を形成したチエーン駆動系
のスプロケツト係り、特に緩衝部の偏摩耗を防止
して耐久性を向上させたものに関する。[Detailed description of the invention] [Industrial application field] This invention forms a buffer portion by sandwiching an intermediate layer made of an elastic body between a pair of metal plates and protruding a part of the intermediate layer from the tooth surface. The present invention relates to a sprocket for a chain drive system, particularly one that prevents uneven wear of the buffer part and improves durability.
［従来の技術］
チエーン駆動装置において、チエーンとスプロ
ケツトがそれぞれ金属製の場合、金属同志の接触
が生じるため、噛み合い騒音が発生する。また自
動２輪車の動力伝達装置のように、伝達すべき駆
動力が大きくなる程、この騒音も大きくなる。そ
こで従来より、かかる噛み合い時の衝撃を緩衝す
べく、噛み合い部に弾性体を設けた構造が種々提
案されている。例えばスプロケツトを一対の金属
プレートにより２枚合わせに構成し、この金属プ
レートで弾性体からなる中間層を挟持し、かつ中
間層の一部を歯面に突出させて緩衝部を形成した
ものがある。このようにすると、緩衝部によつて
噛み合い時の衝撃が緩衝され、噛み合い騒音が効
果的に低減される。しかも緩衝部が中間層と一体
なので、剥離しにくく耐久性が向上する。[Prior Art] In a chain drive device, when the chain and sprocket are each made of metal, contact between the metals occurs, resulting in meshing noise. Furthermore, as in a power transmission device for a two-wheeled motor vehicle, the greater the driving force to be transmitted, the greater the noise. Therefore, various structures have been proposed in the past in which an elastic body is provided in the meshing portion in order to buffer the impact during the meshing. For example, there is a sprocket made of a pair of metal plates, which sandwich an intermediate layer made of an elastic material, and a part of the intermediate layer protrudes from the tooth surface to form a buffer section. . In this way, the shock at the time of meshing is buffered by the buffer portion, and the meshing noise is effectively reduced. Moreover, since the buffer part is integrated with the intermediate layer, it is difficult to peel off and durability is improved.
［考案が解決しようとする問題点］
ところで上記従来例のように、歯面に突出する
緩衝部を形成した場合、偏摩耗に留意しなければ
ならない。すなわち緩衝部のうち、歯先から歯元
近くまでの部分（以下中間部分という）は、駆動
時とエンジンブレーキ状態などの反駆動時とで
は、チエーンと接触しない部分が生じる。しかし
歯元側の部分はいずれの場合もチエーンと接触す
る。したがつて緩衝部のうち歯元側がより摩耗を
受け易い。このため緩衝部が歯先から歯元まで同
じように形成されていると、歯元側が偏摩耗を受
け、中間部分よりも先に使用限界に達する。ゆえ
により耐久性を高めるには、歯元側の偏摩耗を抑
制する必要がある。そこで本考案はかかる問題を
解決し、耐久性の高いスプロケツトの提供を目的
とする。[Problems to be solved by the invention] By the way, when a buffer portion protruding from the tooth surface is formed as in the above conventional example, uneven wear must be taken into consideration. That is, in the buffer section, a portion from the tip of the tooth to near the root (hereinafter referred to as an intermediate portion) does not come into contact with the chain during driving and during non-driving such as engine braking. However, the part on the root side comes into contact with the chain in both cases. Therefore, the root side of the buffer portion is more susceptible to wear. For this reason, if the buffer portion is formed in the same way from the tooth tip to the tooth root, the tooth root side will suffer uneven wear and reach its usable limit before the middle portion. Therefore, in order to further increase durability, it is necessary to suppress uneven wear on the root side. Therefore, the present invention aims to solve this problem and provide a highly durable sprocket.
［問題点を解決するための手段］
本考案に係るスプロケツトは、同一半径を有し
外周に同一の歯を形成して向かい合わせにされた
一対の金属プレートと、これらによつて挟持され
る弾性体の中間層とからなり、前記中間層の一部
を歯面から半径方向へ突出させて緩衝部を形成し
たスプロケツトにおいて、前記緩衝部のうち、歯
元側部分の半径方向突出量並びに回転軸方向の幅
をともに、歯元側部分より歯先側に形成されてい
る中間部分の突出量並びに回転軸方向の幅よりも
大きくしたことを特徴とする。[Means for Solving the Problems] The sprocket according to the present invention consists of a pair of metal plates facing each other with the same radius and the same teeth formed on the outer periphery, and an elastic sprocket sandwiched between them. In the sprocket, a part of the intermediate layer protrudes radially from the tooth surface to form a buffer part. It is characterized in that the width in both directions is larger than the amount of protrusion of the intermediate portion formed on the tooth tip side than the root side portion and the width in the rotating shaft direction.
［考案の作用］
本考案に係るスプロケツトとチエーンとが噛み
合つているとき、駆動状態と反駆動状態とが反復
すると、緩衝部のうち中間部分は、チエーンと接
触するときとしないときとが生じる。しかし歯元
側の部分はいずれの場合もチエーンと接触する。
したがつて緩衝部のうち歯元側がより多く摩耗を
受ける。ところが、歯元側部分における緩衝部の
半径方向突出量並びに回転軸方向の幅がともに、
中間側部分よりも大きくなつているので、歯元側
部分における緩衝部の体積が大きくなる。このた
め緩衝部の摩滅程度は、歯元側及び中間部分側共
に平均化され、歯元側の偏摩耗が防止される。[Operation of the invention] When the sprocket according to the invention and the chain are engaged, when the driving state and the counter-driving state are repeated, the intermediate portion of the buffer part sometimes comes into contact with the chain and sometimes does not. . However, the part on the root side comes into contact with the chain in both cases.
Therefore, the tooth base side of the buffer portion is subject to more wear. However, both the radial protrusion amount and the width in the rotating shaft direction of the buffer part on the root side part are
Since it is larger than the intermediate side portion, the volume of the buffer portion at the dedendum side portion becomes larger. Therefore, the degree of wear of the buffer portion is averaged on both the dedendum side and the intermediate portion side, and uneven wear on the dedendum side is prevented.
［実施例］
第１図乃至第６図に本考案に係る一実施例を示
す。この実施例は自動２輪車のチエーン駆動系に
関するものであり、第１図はその一部でチエーン
とスプロケツトの噛み合い部分の側面、第２図は
その拡大図、第３図乃至第５図はそれぞれスプロ
ケツトの歯部における拡大断面を示す。また第６
図は本実施例のスプロケツトを使用した自動２輪
車のチエーン駆動系における模式図である。この
チエーン駆動装置は、共に噛み合う金属製のスプ
ロケツト１とチエーン２からなる。第２図にも詳
しいように、スプロケツト１の外周上には多数の
歯３が形成されている。また各歯３の歯面上に
は、その外形に沿つて側部から谷部４まで連続し
て歯部緩衝体５（本考案における緩衝部に相当す
る）が形成されている。なおこの詳細は後述す
る。さらに歯元近くのスプロケツト１外周部側面
にも、スプロケツト１と同心円状でかつ肉盛りさ
れた側部緩衝体６が形成されている。これら歯部
及び側部緩衝体５，６は、共にスプロケツト１と
チエーン２との金属同志の接触を防止し、噛み合
い時における衝撃を緩衝するものである。なお側
部緩衝体６は、なんらかの原因でスプロケツト１
及びチエーン２のそれぞれの中心がずれ、スプロ
ケツト１側面における接触が発生する場合におけ
る緩衝に役立ち、スプロケツト１とチエーン２と
の噛み合い時における衝撃振動に対する抑振、制
振作用による噛み合い騒音を低減できる。[Embodiment] FIGS. 1 to 6 show an embodiment of the present invention. This embodiment relates to a chain drive system of a two-wheeled motor vehicle. Fig. 1 shows a part of the chain drive system, a side view of the meshing part between the chain and sprocket, Fig. 2 is an enlarged view thereof, and Figs. 3 to 5 are Each figure shows an enlarged cross section of the teeth of the sprocket. Also the 6th
The figure is a schematic diagram of a chain drive system of a two-wheeled motor vehicle using the sprocket of this embodiment. This chain drive device consists of a metal sprocket 1 and a chain 2 that mesh together. As shown in detail in FIG. 2, a large number of teeth 3 are formed on the outer circumference of the sprocket 1. Further, on the tooth surface of each tooth 3, a tooth buffer 5 (corresponding to the buffer in the present invention) is formed continuously along the outer shape from the side portion to the valley portion 4. The details will be described later. Furthermore, a side buffer 6 is formed on the outer peripheral side surface of the sprocket 1 near the root of the teeth, which is concentric with the sprocket 1 and has a built-up surface. These tooth portions and side buffers 5 and 6 both prevent the metals of the sprocket 1 and the chain 2 from coming into contact with each other, and buffer shocks during meshing. Note that the side shock absorber 6 may not be connected to the sprocket 1 for some reason.
It is useful for buffering when the respective centers of the chain 2 are shifted and contact occurs on the side surface of the sprocket 1, and it is possible to suppress shock vibrations when the sprocket 1 and the chain 2 engage with each other, and to reduce meshing noise due to the damping effect.
このスプロケツト１は第３図に詳しいように、
左右対称である一対の金属プレート７及び８から
なり、弾性体の中間層９を挟んで、両者を２枚合
わせに重ね合わせ、リベツト１０により一体化し
てなるものである。各金属プレート７及び８は、
同一半径でかつそれぞれの外周に同一ピツチで同
形の歯が多数形成されたものである。したがつて
両者を一体化すると、その外周には両部材によつ
て構成された単一の歯３が形成される。また各金
属プレート７及び８の歯３を構成する部分を、歯
部７ａ及び８ａとすれば、これらを２枚合わせし
たとき、両者の間に湾曲空間を形成するように、
それぞれ対称形状に湾曲形成されている。さらに
歯部７ａ及び８ａの側部には、前記湾曲空間に連
通し得るよう、注入口１１，１２がそれぞれ開口
形成されている。また歯部７ａ及び８ａの各歯面
端部７ｂ及び８ｂの合わせ部には若干の間隔が形
成されている。但し第４図に示すように歯先部に
はこの隙間が形成されていない。中間層９は、こ
の湾曲空間内に充填形成され、かつその一部が連
続一体の歯部緩衝体５と側部緩衝体６となつてい
る。なお歯部緩衝体５は、第２図、第３図及び第
５図に示すように、中間部５ａよりも歯元側５ｂ
の方が、突出量（半径方向へ歯面に突出する量、
以下同）及び幅（回転軸方向における幅、以下
同）が大きくなるように形成されている。すなわ
ち中間部５ａの突出量及び幅をそれぞれt1，L1と
し、歯元側５ｂのそれをt2，L2とすれば、t1＜t2，
L1＜L2の関係にある。 As detailed in Fig. 3, this sprocket 1 is
It is made up of a pair of metal plates 7 and 8 which are bilaterally symmetrical, which are stacked one on top of the other with an elastic intermediate layer 9 in between, and are integrated with rivets 10. Each metal plate 7 and 8 is
A large number of teeth with the same radius and the same shape are formed at the same pitch on each outer periphery. Therefore, when the two members are integrated, a single tooth 3 made up of both members is formed on the outer periphery. Also, if the parts of the metal plates 7 and 8 that constitute the teeth 3 are the tooth portions 7a and 8a, when these two plates are put together, a curved space is formed between them.
Each is curved in a symmetrical shape. Furthermore, injection ports 11 and 12 are formed in the sides of the teeth 7a and 8a, respectively, so as to communicate with the curved space. Further, a slight interval is formed between the mating portions of the respective tooth surface end portions 7b and 8b of the tooth portions 7a and 8a. However, as shown in FIG. 4, this gap is not formed at the tooth tip. The intermediate layer 9 is filled and formed in this curved space, and a portion of the intermediate layer 9 forms the tooth portion buffer 5 and the side portion buffer 6 which are continuously integrated. In addition, as shown in FIG. 2, FIG. 3, and FIG.
, the amount of protrusion (the amount of protrusion on the tooth surface in the radial direction,
(hereinafter the same)) and width (width in the rotation axis direction, hereinafter the same) are formed to be large. That is, if the protrusion amount and width of the intermediate portion 5a are respectively t 1 and L 1 , and those of the root side 5b are t 2 and L 2 , then t 1 <t 2 ,
There is a relationship of L 1 < L 2 .
次にこのスプロケツト１を製造する方法を説明
する。まず金属プレート７及び８を成形する場合
は、予め歯部７ａ及び８ａに相当する部分が所定
の湾曲形状になるように、鋼板をプレス成形して
歯形形状に型抜きする。このようにしてなる金属
プレート７及び８を、歯部７ａ及び８ａによつて
湾曲空間が形成されるよう２枚合わせに重ねてリ
ベツト１０で一体化し、スプロケツト１の金属部
分を得る。次にこの外周部側を分割型（図示省
略）で挟み、注入口１１，１２から歯部７ａと８
ａによつて形成された湾曲空間内へ弾性体の原料
樹脂液等を注入し、加熱等によつて硬化させる。
これにより湾曲空間内に中間層９が充填形成され
る。このとき分割型の型面には予め歯部緩衝体５
と側部緩衝体６に対応する成形面が形成されてい
るので、中間層９を構成する弾性体の一部が、歯
部７ａ及び８ａの合わせ部に形成されている間隙
から歯面側へはみ出して歯部緩衝体５を形成し、
同時にスプロケツトの外周部側面にも側部緩衝体
６が一体に形成される。但し第４図に示すように
歯先部には弾性体がはみ出さないので、歯部緩衝
体５は形成されていない。なお中間層９を形成す
る弾性体の材料は、合成ゴムや各種の合成樹脂弾
性材料例えばポリウレタンエラストマーなど、適
宜の弾性材料を用いることができる。 Next, a method of manufacturing this sprocket 1 will be explained. First, when forming the metal plates 7 and 8, a steel plate is press-formed and die-cut into a tooth-shaped shape in advance so that the portions corresponding to the tooth portions 7a and 8a have a predetermined curved shape. The metal plates 7 and 8 thus formed are stacked together so that a curved space is formed by the teeth 7a and 8a and are integrated with rivets 10 to obtain the metal portion of the sprocket 1. Next, this outer peripheral side is sandwiched between split molds (not shown), and the teeth 7a and 8 are inserted through the injection ports 11 and 12.
A raw material resin liquid for the elastic body is injected into the curved space formed by a and hardened by heating or the like.
As a result, the intermediate layer 9 is filled and formed within the curved space. At this time, the mold surface of the split mold is provided with a tooth buffer 5 in advance.
Since a molded surface corresponding to the side buffer body 6 is formed, a part of the elastic body constituting the intermediate layer 9 can move from the gap formed at the joining part of the tooth parts 7a and 8a to the tooth surface side. It protrudes to form a tooth buffer 5,
At the same time, a side buffer body 6 is also integrally formed on the outer peripheral side surface of the sprocket. However, as shown in FIG. 4, since the elastic body does not protrude from the tooth tip, the tooth buffer 5 is not formed. As the material of the elastic body forming the intermediate layer 9, any appropriate elastic material such as synthetic rubber or various synthetic resin elastic materials such as polyurethane elastomer can be used.
次に本実施例の作用を説明する。第６図は自動
２輪車のチエーン駆動系の模式図であり、エンジ
ン１３に設けられているドライブ側のスプロケツ
ト１４とドリブン側のスプロケツト１の間にチエ
ーン２が巻回されている。そこで通常の駆動時に
は、ドライブ側のスプロケツト１４から入力さ
れ、これが矢示D1方向に回転するので、この駆
動力は、チエーン２及びスプロケツト１へ伝達さ
れ、これらがそれぞれ矢示D2及びD3方向へ回転
する。またエンジンブレーキ状態などの反駆動時
には、逆にスプロケツト１側から入力され、これ
が矢示B1方向へ駆動力を受けると、チエーン２
及びドライブ側のスプロケツト１４へ伝達され、
これらがそれぞれ矢示B2，B3方向へ回転させら
れる。そこで駆動時及び反駆動時におけるスプロ
ケツト１とチエーン２の噛合い状態に変化が生じ
ることになる。これについて第２図により説明す
る。まず駆動状態においては、スプロケツト１の
歯３とチエーン２とが噛み合い、スプロケツト１
が矢示方向へ回転するので、チエーン２のローラ
部２ａは符号Ｎで示す中立位置から符号Ｄで示す
駆動位置へ移動する。したがつてローラ部２ａと
歯部緩衝体５との接触位置は、歯元側５ｂから中
間部５ａの一側面（図示した各歯３の右側辺）へ
移動しながら駆動力を伝達する。またエンジンブ
レーキ状態などの反駆動状態においては、ローラ
部２ａは最初、符号Ｂで示す反駆動位置にあり、
やがて入力の減少にり中立位置Ｎへ移動する。し
たがつてローラ部２ａと歯部緩衝体５の接触は、
中間部５ａの反対側側面（図示した各歯３の左側
辺）歯元側５ｂへ移動する。よつて駆動状態及び
反駆動状態を反復しながら長期にわたつて使用し
た場合、歯部緩衝体５がローラ部２ａとの摩擦接
触によつて摩耗される。このとき歯元側５ｂ部分
は常時ローラ部２ａから荷重を受けるので、他部
よりも摩耗される割り合いが大きい。しかし、こ
の部分は、前述のように突出量及び幅が共に中間
部５ａよりも大きくなつている。ゆえに、歯部緩
衝体５の歯元側５ｂ部分の体積が大きくなるた
め、歯部緩衝体５の摩滅する速度は、中間部５ａ
から歯元側５ｂにかけて、全体に均一化される。
したがつて歯部緩衝体５の耐久性能が向上する。 Next, the operation of this embodiment will be explained. FIG. 6 is a schematic diagram of a chain drive system of a two-wheeled motor vehicle, in which a chain 2 is wound between a drive side sprocket 14 provided on an engine 13 and a driven side sprocket 1. Therefore, during normal driving, input is received from the sprocket 14 on the drive side, which rotates in the direction of arrow D1, so this driving force is transmitted to the chain 2 and sprocket 1 , which rotate in the direction of arrows D2 and D3, respectively. Rotate in the direction. In addition, during counter-driving conditions such as engine braking, input is applied from the sprocket 1 side, and when this receives driving force in the direction of arrow B1 , the chain 2
and is transmitted to the drive side sprocket 14,
These are rotated in the directions of arrows B 2 and B 3 , respectively. Therefore, a change occurs in the meshing state of the sprocket 1 and the chain 2 during driving and non-driving. This will be explained with reference to FIG. First, in the driving state, the teeth 3 of the sprocket 1 and the chain 2 mesh, and the sprocket 1
rotates in the direction of the arrow, so the roller portion 2a of the chain 2 moves from the neutral position indicated by symbol N to the driving position indicated by symbol D. Therefore, the contact position between the roller portion 2a and the tooth portion buffer 5 transmits the driving force while moving from the root side 5b to one side of the intermediate portion 5a (the right side of each tooth 3 shown). In addition, in a non-driving state such as an engine braking state, the roller portion 2a is initially in the non-driving position indicated by the symbol B.
Eventually, as the input decreases, it moves to the neutral position N. Therefore, the contact between the roller portion 2a and the tooth portion buffer 5 is as follows.
The opposite side surface of the intermediate portion 5a (the left side of each tooth 3 shown in the figure) moves toward the root side 5b. Therefore, when used for a long period of time while repeating the driving state and the non-driving state, the tooth portion buffer 5 is worn out due to frictional contact with the roller portion 2a. At this time, since the root side 5b portion is constantly receiving a load from the roller portion 2a, it is worn at a higher rate than other portions. However, as described above, both the amount of protrusion and the width of this portion are larger than that of the intermediate portion 5a. Therefore, since the volume of the root side 5b portion of the tooth buffer 5 increases, the speed at which the tooth buffer 5 wears out is lower than that of the intermediate portion 5a.
It is made uniform throughout from the dentine side 5b to the root side 5b.
Therefore, the durability of the tooth buffer 5 is improved.
なお本実施例は、歯部緩衝体５の突出量変化に
加え、その幅も変化させたので、歯元側５ｂにお
いて突出量をそれほど大きくしなくても、その体
積を大きくすることができる。したがつて、歯元
側５ｂの弱体化を防ぐことができる。また歯部及
び側部緩衝体５，６は、歯部７ａ及び８ａ間の湾
曲空間内に充填された中間層９と一体に形成され
ている。ゆえに歯部及び側部緩衝体５，６及び中
間層９と金属プレート７及び８との接触面積が著
しく大きくなり、これら歯部及び側部緩衝体５及
び６が歯面から剥離しにくくなるので、耐久性が
向上する。そのうえ側部緩衝体６によつて、スプ
ロケツト１とチエーン２との噛み合い時における
衝撃振動に対する抑振、制振作用による噛み合い
騒音を低減できる。 In addition, in this embodiment, in addition to changing the amount of protrusion of the tooth portion buffer body 5, the width thereof is also changed, so that the volume can be increased without increasing the amount of protrusion so much on the root side 5b. Therefore, weakening of the root side 5b can be prevented. The toothed portions and the side buffers 5 and 6 are integrally formed with an intermediate layer 9 filled in the curved space between the toothed portions 7a and 8a. Therefore, the contact area between the teeth and side buffers 5, 6 and the intermediate layer 9 and the metal plates 7 and 8 becomes significantly large, making it difficult for these teeth and side buffers 5 and 6 to separate from the tooth surfaces. , durability is improved. Furthermore, the side shock absorbers 6 can suppress impact vibrations when the sprocket 1 and the chain 2 are engaged with each other, and can reduce engagement noise due to the damping action.
［考案の効果］
本考案に係るスプロケツトの歯面に突出形成さ
れる緩衝部は、歯元側部分における半径方向突出
量並びに回転軸方向の幅がともに、中間部分側よ
りも大きくなつているので、歯元側部分における
緩衝部の体積を大きくできる。このため歯元側の
偏摩耗を防止することができ、歯元側及び中間部
分側共に摩耗程度を平均化させることができる。
ゆえにスプロケツトの耐久性を高めることができ
る。[Effect of the invention] The buffer portion formed protrudingly on the tooth surface of the sprocket according to the present invention has a larger protrusion amount in the radial direction and a width in the direction of the rotating shaft at the tooth base side than at the intermediate portion side. , it is possible to increase the volume of the buffer part at the root side portion. Therefore, uneven wear on the dedendum side can be prevented, and the degree of wear on both the dedendum side and the intermediate portion side can be averaged.
Therefore, the durability of the sprocket can be increased.
第１図乃至第６図に本考案に係る一実施例を示
し、第１図は要部の側面図、第２図はその部分拡
大図、第３図は第１図の−線拡大断面図、第
４図は第１図の−線拡大断面図、第５図は第
１図の−線拡大断面図、第６図はチエーン駆
動系の模式図である。
符号の説明、１……スプロケツト、２……チエ
ーン、３……歯、５……歯部緩衝体、５ａ……中
間部、５ｂ……歯元側、７，８……金属プレー
ト、９……中間層。
Figures 1 to 6 show an embodiment of the present invention, with Figure 1 being a side view of the main parts, Figure 2 being a partially enlarged view, and Figure 3 being an enlarged sectional view taken along the line - , FIG. 4 is an enlarged cross-sectional view taken along the - line in FIG. 1, FIG. 5 is an enlarged cross-sectional view taken along the - line in FIG. 1, and FIG. 6 is a schematic diagram of the chain drive system. Explanation of symbols, 1... Sprocket, 2... Chain, 3... Teeth, 5... Tooth buffer, 5a... Intermediate portion, 5b... Root side, 7, 8... Metal plate, 9... ...middle class.
Claims (1)
い合わせにされた一対の金属プレートと、これら
によつて挟持される弾性体の中間層とからなり、
前記中間層の一部を歯面から半径方向へ突出させ
て緩衝部を形成したスプロケツトにおいて、前記
緩衝部のうち、歯元側部分の半径方向突出量並び
に回転軸方向の幅をともに、歯元側部分より歯先
側に形成されている中間部分の突出量並びに回転
軸方向の幅よりも大きくしたことを特徴とするス
プロケツト。 It consists of a pair of metal plates facing each other with the same radius and the same teeth formed on the outer periphery, and an intermediate layer of elastic material sandwiched between them,
In the sprocket in which a part of the intermediate layer protrudes radially from the tooth surface to form a buffer part, both the radial protrusion amount and the width in the rotating shaft direction of the dedendum side part of the buffer part are equal to the dedendum. A sprocket characterized in that the amount of protrusion of the intermediate portion formed on the side of the tooth tip is larger than the width of the side portion in the direction of the rotating shaft.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987019045U JPH0535231Y2 (en) | 1987-02-11 | 1987-02-11 | |
| US07/146,475 US4867733A (en) | 1987-01-23 | 1988-01-21 | Chain drive system |
| DE3801865A DE3801865A1 (en) | 1987-01-23 | 1988-01-22 | CHAIN DRIVE |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987019045U JPH0535231Y2 (en) | 1987-02-11 | 1987-02-11 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63126659U JPS63126659U (en) | 1988-08-18 |
| JPH0535231Y2 true JPH0535231Y2 (en) | 1993-09-07 |
Family
ID=30813285
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1987019045U Expired - Lifetime JPH0535231Y2 (en) | 1987-01-23 | 1987-02-11 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0535231Y2 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006007799A (en) | 2004-06-22 | 2006-01-12 | Shimano Inc | Sprocket for bicycle |
| JP2006248290A (en) | 2005-03-09 | 2006-09-21 | Shimano Inc | Sprocket for bicycle |
| US7824287B2 (en) | 2005-12-02 | 2010-11-02 | Shimano Inc. | Bicycle sprocket |
| JP2009024803A (en) * | 2007-07-20 | 2009-02-05 | Konica Minolta Business Technologies Inc | Gear composed of composite material |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS488533U (en) * | 1971-06-09 | 1973-01-30 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52163662U (en) * | 1976-06-05 | 1977-12-12 |
-
1987
- 1987-02-11 JP JP1987019045U patent/JPH0535231Y2/ja not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS488533U (en) * | 1971-06-09 | 1973-01-30 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63126659U (en) | 1988-08-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4867733A (en) | Chain drive system | |
| JPH08506649A (en) | Stress dissipative gear and manufacturing method thereof | |
| EP0926394B1 (en) | Double-meshing-type silent chain and sprocket for meshing with the chain along outer circumference thereof | |
| US4869709A (en) | Driving gear for a bicycle | |
| JP2012522193A (en) | V-belt transmission system combining friction transmission and meshing transmission | |
| JPH0535231Y2 (en) | ||
| JPH0121229Y2 (en) | ||
| JPH01153865A (en) | Transmitting device for engine power | |
| EP0426678B1 (en) | Device for eliminating rattle in a gear box | |
| KR940001735B1 (en) | Gear | |
| US2739462A (en) | Shockproof gear | |
| JPH02292550A (en) | Integral type asymmetrical planetary gear | |
| KR101136692B1 (en) | Motorcycle wheel isolator | |
| JPS63180768A (en) | Chain driving device | |
| EP0201562B1 (en) | Synchronous drive system | |
| GB2215807A (en) | Toothed gear wheel | |
| JPH0729331Y2 (en) | V belt for high load transmission | |
| EP0870131B1 (en) | Roller chain drive system having improved noise characteristics | |
| US3774465A (en) | Sprocket wheel for snowmobile or the like | |
| JP2004211789A (en) | Flexible shaft coupling | |
| KR100857623B1 (en) | Structure of worm gear for electric power steering system | |
| JPH04262980A (en) | Core metal for rubber crawler | |
| JP2644562B2 (en) | Endless transmission belt | |
| CN220054060U (en) | Power-assisted bicycle transmission system and power-assisted bicycle | |
| CN217951155U (en) | Damping scissors gear and engine balance shaft gear structure |