JPH0518087Y2 - - Google Patents
Info
- Publication number
- JPH0518087Y2 JPH0518087Y2 JP1988129433U JP12943388U JPH0518087Y2 JP H0518087 Y2 JPH0518087 Y2 JP H0518087Y2 JP 1988129433 U JP1988129433 U JP 1988129433U JP 12943388 U JP12943388 U JP 12943388U JP H0518087 Y2 JPH0518087 Y2 JP H0518087Y2
- Authority
- JP
- Japan
- Prior art keywords
- sprocket
- feed dog
- drive
- saw chain
- saw
- 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
- 238000005266 casting Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 238000005219 brazing Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
Landscapes
- Gears, Cams (AREA)
Description
【考案の詳細な説明】
（産業上の利用分野）
この考案はチエンソーのエンジン動力をソーチ
エンに伝達するのに、駆動軸に装着してソーチエ
ンが掛け渡されるチエンソー用駆動スプロケツト
の改良に関する。[Detailed Description of the Invention] (Field of Industrial Application) This invention relates to an improvement of a drive sprocket for a chain saw that is attached to a drive shaft and spans a saw chain in order to transmit engine power of the chain saw to the saw chain.
（従来の技術）
従来より、チエンソーにおいて、エンジン動力
をソーチエンに伝達するのに、駆動軸に装着され
る駆動スプロケツトには、ソーチエンを送り歯上
に直接的に掛け渡してソーチエンの駆動片を送り
歯に当てる歯車形式のもの（以下、スター型スプ
ロケツトという）と、送り歯が一対の環体間の隙
間部に形設され、ソーチエンの駆動片を隙間部内
に緩嵌して送り歯に当てる環体形式のもの（以
下、リム型スプロケツトという）が汎用されてい
る。(Prior art) Conventionally, in order to transmit engine power to the saw chain in a chain saw, the drive sprocket attached to the drive shaft has a saw chain that is directly stretched over the feed teeth to feed the drive piece of the saw chain. One type is a gear type sprocket that is applied to the teeth (hereinafter referred to as a star type sprocket), and the other is a ring type in which the feed dog is formed in the gap between a pair of ring bodies and the drive piece of the saw chain is loosely fitted into the gap and the ring is applied to the feed dog. Sprockets in the body type (hereinafter referred to as rim type sprockets) are commonly used.
（考案が解決しようとする課題）
上記するスター型スプロケツトは、ソーチエン
を送り歯上に直接的に掛け渡たすところから、ソ
ーチエンのテンシヨンと駆動力の両方が送り歯に
掛かるため、歯面の面圧が上がつて摩耗し易く、
また、この摩耗によつて歯先円が変わるとピツチ
円も変わり、ソーチエンの弛みの原因になる。(Problem to be solved by the invention) In the star-type sprocket described above, since the saw chain is directly stretched over the feed dog, both the tension and driving force of the saw chain are applied to the feed dog. The surface pressure increases and wears easily,
Additionally, if the tip circle changes due to this wear, the pitch circle also changes, causing the saw chain to loosen.
他方、リム型スプロケツトは、ソーチエンのテ
ンシヨンは環体外周面に受け、駆動力のみが送り
歯に掛かるため、送り歯の摩耗に起因してのソー
チエンの弛みは少ないが、送り歯の歯先が摩耗し
てしばしばこれをソーチエンの駆動片が乗り越え
ることが起こり、ソーチエンの浮き上がり現象を
生じて作業性を悪化させる。 On the other hand, with a rim-type sprocket, the tension of the saw chain is received on the outer circumferential surface of the ring body, and only the driving force is applied to the feed dog, so there is less slack in the saw chain due to wear of the feed dog, but the tooth tip of the feed dog As a result of wear, the driving piece of the saw chain often rides over this, causing the saw chain to lift up and worsening workability.
この考案は上述の点に鑑みなされたものであつ
て、リム型スプロケツトにおける送り歯の歯末部
を強化して送り歯の摩耗を極力抑え、ソーチエン
の浮き上がり等がなく、長期間の使用に耐えるチ
エンソー用駆動スプロケツトを提供することを目
的とする。 This idea was created in view of the above points, and it strengthens the tooth end of the feed dog in the rim type sprocket to minimize wear on the feed dog, eliminates the lifting of the saw chain, and allows it to withstand long-term use. The purpose of the present invention is to provide a drive sprocket for a chain saw.
（課題を解決するための手段）
上記の目的を達成するためのこの考案の要旨と
するところは、一対の環体間にソーチエンの駆動
片が緩嵌される隙間と駆動片の送り歯を一体に形
設してなり、駆動軸に装着されるチエンソー用駆
動スプロケツトにおいて、前記送り歯の歯先から
環体部を含めてスプロケツト半径方向に切込み溝
を設け、該切込み溝に超硬チツプを埋設して送り
歯の歯末部を形成したことを特徴とするチエンソ
ー用駆動スプロケツトにある。(Means for solving the problem) The gist of this invention to achieve the above object is to integrate the feed dog of the drive piece into the gap in which the drive piece of the saw chain is loosely fitted between the pair of ring bodies. In the drive sprocket for a chain saw, which is formed in a shape of The present invention provides a drive sprocket for a chain saw, characterized in that the tooth end portion of the feed dog is formed by using the following steps.
（作用）
上記の如く構成したこの考案のスプロケツト
は、駆動軸に装着してソーチエンを案内板外周か
ら一連に掛け渡し、ソーチエンの駆動回走には、
ソーチエンの駆動片が送り歯の歯末部を形成する
超硬チツプ面に当たつて駆動力が伝達されるよう
になり、送り歯の摩耗が軽減される。(Function) The sprocket of this invention configured as described above is attached to the drive shaft and spans the saw chain continuously from the outer periphery of the guide plate.
The drive piece of the saw chain comes into contact with the carbide chip surface forming the tooth end of the feed dog, and the driving force is transmitted, reducing wear on the feed dog.
（実施例）
以下、この考案の実施例を図面に基づいて説明
する。(Example) Hereinafter, an example of this invention will be described based on the drawings.
第１図はこの考案の一部を欠除した正面図であ
る。 FIG. 1 is a partially cutaway front view of this invention.
図において、１はスプロケツトで、このスプロ
ケツト１は、一対の環体２間にソーチエンＡの駆
動片Ｂが緩嵌する大きさの隙間３と駆動片Ｂが当
たる送り歯４を一体に形設してなる。 In the figure, 1 is a sprocket, and this sprocket 1 is integrally formed with a gap 3 large enough to loosely fit the drive piece B of the saw chain A between a pair of ring bodies 2, and a feed dog 4 on which the drive piece B comes into contact. It becomes.
尚、スプロケツト１は鋳造によつて造られ、機
械加工によつて仕上げられる。 Incidentally, the sprocket 1 is manufactured by casting and finished by machining.
５はスプロケツト１に埋設した超硬チツプで、
ソーチエンＡの駆動片Ｂが当たる送り歯４の歯末
部を形成するもので、スプロケツト１への超硬チ
ツプの５の埋設には、スプロケツト１を機械加工
した後、送り歯４の歯先から環体２部を含めてス
プロケツト半径方向に切込み溝６を設け、この切
込み溝６に超硬チツプ５を嵌合してろう付けによ
つて一体的に固着している。 5 is a carbide chip embedded in sprocket 1,
It forms the tooth tip of the feed dog 4 that the drive piece B of the saw chain A comes into contact with.In order to embed the carbide chip 5 in the sprocket 1, after machining the sprocket 1, from the tooth tip of the feed dog 4. A cut groove 6 is provided in the radial direction of the sprocket including the ring body 2, and a carbide tip 5 is fitted into the cut groove 6 and fixed integrally by brazing.
尚、スプロケツト１に超硬チツプ５を埋設する
に当たつて、超硬チツプ５の上端をスプロケツト
外周面２ａから僅かに突出させて突起５ａを形成
し、ソーチエンＡのリンクＣに設けたノツチＤに
係合させるようにするのが好ましい。 In addition, when embedding the carbide chip 5 in the sprocket 1, the upper end of the carbide chip 5 is slightly protruded from the sprocket outer peripheral surface 2a to form a protrusion 5a, and the notch D provided in the link C of the saw chain A is formed. It is preferable to engage the
上記構成において、第２図に示すように、周知
のリム型スプロケツト同様にエンジン側の駆動軸
Ｅに装着し、そして、図示しない案内板外周から
一連に無端のソーチエンＡを掛け渡して使用に供
する。 In the above configuration, as shown in FIG. 2, it is attached to the drive shaft E on the engine side in the same way as the well-known rim type sprocket, and an endless saw chain A is stretched over the outer periphery of the guide plate (not shown) for use. .
（効果）
上記のように構成したこの考案によれば、次の
ような効果を奏する。(Effects) According to this invention configured as described above, the following effects are achieved.
(1) 従来の鋳造によつて造られるリム型スプロケ
ツトの場合、局部的処理により送り歯部分だけ
を強化することは出来ないが、この考案では、
ソーチエンの駆動片が当たる送り歯の歯末部を
超硬チツプにより形成して送り歯を強化したか
ら、送り歯の歯末部の摩耗が極端に少なくな
り、長期間の使用に耐える。(1) In the case of a rim-type sprocket made by conventional casting, it is not possible to strengthen only the feed dog portion by local treatment, but with this invention,
The tooth end of the feed dog, which the saw chain's drive piece touches, is made of carbide chips to strengthen the feed dog, so wear on the end of the feed dog is extremely reduced, making it durable for long-term use.
(2) 従来の鋳造によつて造られるリム型スプロケ
ツトの場合、機械加工によりスプロケツト外周
面から送り歯の歯先を突出させるような加工は
極めて困難であるが、この考案では超硬チツプ
を埋設するのに、その上端（送り歯の歯先）を
スプロケツト外周面から突出させて突起を形成
し、この突起をソーチエンのリンクに設けたノ
ツチに係合させることが可能になり、駆動スプ
ロケツト上におけるソーチエンの回走方向のが
た付き等を少なくして安定性を向上し、また、
駆動力の分散にも寄与し、この面からも送り歯
の摩耗を一層軽減する。(2) In the case of rim-type sprockets made by conventional casting, it is extremely difficult to machine the tips of the feed teeth to protrude from the outer circumferential surface of the sprocket. However, the upper end (tip of the feed dog) is made to protrude from the outer circumferential surface of the sprocket to form a protrusion, and this protrusion can be engaged with a notch provided on the link of the saw chain. Improved stability by reducing rattling in the direction of rotation of the saw chain, and
It also contributes to the dispersion of driving force, further reducing wear on the feed dog.
第１図はこの考案の一部を欠除した正面図、第
２図は斜視図である。
１……スプロケツト、２……環体、３……隙
間、４……送り歯、５……超硬チツプ、６……切
込み溝、Ａ……ソーチエン、Ｂ……駆動片、Ｃ…
…リンク、Ｄ……ノツチ、Ｅ……駆動軸。
FIG. 1 is a partially cutaway front view of this invention, and FIG. 2 is a perspective view. 1... Sprocket, 2... Annular body, 3... Gap, 4... Feed dog, 5... Carbide tip, 6... Cut groove, A... Saw chain, B... Drive piece, C...
...Link, D...Notch, E...Drive shaft.
Claims (1)
る隙間と駆動片の送り歯を一体に形設してなり、
駆動軸に装着されるチエンソー用駆動スプロケツ
トにおいて、前記送り歯の歯先から環体部を含め
てスプロケツト半径方向に切込み溝を設け、該切
込み溝に超硬チツプを埋設して送り歯の歯末部を
形成したことを特徴とするチエンソー用駆動スプ
ロケツト。 The gap in which the drive piece of the saw chain is loosely fitted between the pair of ring bodies and the feed dog of the drive piece are integrally formed.
In a drive sprocket for a chain saw that is attached to a drive shaft, a cut groove is provided in the radial direction of the sprocket from the tip of the feed dog to the annular portion, and a carbide chip is embedded in the cut groove to cut the tip of the feed dog. A drive sprocket for a chain saw, characterized in that a part is formed in the drive sprocket.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1988129433U JPH0518087Y2 (en) | 1988-10-01 | 1988-10-01 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1988129433U JPH0518087Y2 (en) | 1988-10-01 | 1988-10-01 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0250303U JPH0250303U (en) | 1990-04-09 |
| JPH0518087Y2 true JPH0518087Y2 (en) | 1993-05-14 |
Family
ID=31383705
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1988129433U Expired - Lifetime JPH0518087Y2 (en) | 1988-10-01 | 1988-10-01 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0518087Y2 (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55100462A (en) * | 1979-01-18 | 1980-07-31 | Fmc Corp | Sprocket assembly |
| JPS6230602B2 (en) * | 1983-10-14 | 1987-07-03 | Nippon Telegraph & Telephone |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH029921Y2 (en) * | 1985-08-09 | 1990-03-13 |
-
1988
- 1988-10-01 JP JP1988129433U patent/JPH0518087Y2/ja not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55100462A (en) * | 1979-01-18 | 1980-07-31 | Fmc Corp | Sprocket assembly |
| JPS6230602B2 (en) * | 1983-10-14 | 1987-07-03 | Nippon Telegraph & Telephone |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0250303U (en) | 1990-04-09 |
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