JPH04122810U - Crankshaft connection structure of 2-stroke multi-cylinder engine - Google Patents
Crankshaft connection structure of 2-stroke multi-cylinder engineInfo
- Publication number
- JPH04122810U JPH04122810U JP5863991U JP5863991U JPH04122810U JP H04122810 U JPH04122810 U JP H04122810U JP 5863991 U JP5863991 U JP 5863991U JP 5863991 U JP5863991 U JP 5863991U JP H04122810 U JPH04122810 U JP H04122810U
- Authority
- JP
- Japan
- Prior art keywords
- bearing
- guide pipe
- crankshafts
- shaft
- cylinder engine
- 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
- 230000002093 peripheral effect Effects 0.000 abstract description 4
- 230000000694 effects Effects 0.000 description 7
- 238000012856 packing Methods 0.000 description 3
- 238000013459 approach Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000002828 fuel tank Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 235000013372 meat Nutrition 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
Landscapes
- Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
Abstract
(57)【要約】
【目 的】 ２サイクル２気筒エンジンで、両シリンダ
の下方となる両クランク間の両クランク軸の連結と、両
クランク室間をシール可能とする。
【構 成】 並設した両シリンダ１、２の下方の両クラ
ンク室１ａ、２ａにクランク軸３、４をそれぞれ軸架し
て構成する２サイクル多気筒エンジンにおいて、両クラ
ンク室１ａ、２ａの間に延出する両クランク軸３、４の
軸部３ａ、４ａの少なくとも一方を両クランク室１ａ、
２ａ間の円周支持面５にベアリング６を介して軸架する
とともに、該ベアリング６と略同じ厚さを有して該ベア
リング６に並設するガイドパイプ７には前記両軸部３
ａ、４ａを圧入して一体的に連結し、前記円周支持面５
に近接する前記ガイドパイプ７の外周面には多数の円周
溝８を形成して構成したものである。
(57) [Summary] [Purpose] To connect both crankshafts between both cranks located below both cylinders and to seal between both crank chambers in a 2-stroke, 2-cylinder engine. [Structure] In a two-stroke multi-cylinder engine configured by mounting crankshafts 3 and 4 on both crank chambers 1a and 2a below both cylinders 1 and 2 arranged in parallel, At least one of the shaft portions 3a, 4a of both crankshafts 3, 4 extending into both crank chambers 1a,
The shaft portion 3 is mounted on the circumferential support surface 5 between the shafts 2a through a bearing 6, and the guide pipe 7 has approximately the same thickness as the bearing 6 and is arranged in parallel to the bearing 6.
a, 4a are press-fitted and connected integrally, and the circumferential support surface 5
A large number of circumferential grooves 8 are formed on the outer peripheral surface of the guide pipe 7 adjacent to the guide pipe 7.
Description
【０００１】0001
本考案は、両気筒下方の両クランク軸の軸部を連結して組付けることができる ２サイクル多気筒エンジンのクランク軸連結構造に関する。 This invention allows the shaft parts of both crankshafts below both cylinders to be connected and assembled. The present invention relates to a crankshaft connection structure for a two-stroke multi-cylinder engine.
【０００２】0002
従来は、並設した両シリンダの下方の両クランク室にクランク軸をそれぞれ軸 架して構成する２サイクル多気筒エンジンにおいて、特公昭６０−３５５２２号 公報に見られるように、両クランク室の間のクランク軸部を両ベアリングに軸架 するとともに、両ベアリング間には、外周面に輪状溝を形成することもできる薄 肉のカラーを嵌装し、該カラーの外周側にラビリンスパッキンを嵌装するような 構造は知られている。 Conventionally, the crankshafts were placed in both crank chambers below both cylinders installed side by side. In a two-stroke multi-cylinder engine configured by As seen in the publication, the crankshaft between both crank chambers is mounted on both bearings. At the same time, there is a thin film between both bearings that can form an annular groove on the outer circumferential surface. A method such as fitting a meat collar and fitting a labyrinth packing around the outer circumference of the collar. The structure is known.
【０００３】0003
しかしながら、前記従来例のように両クランク室間のクランク軸部が１本とな る構造では、両クランク室間にベアリング、カラー、ラビリンスパッキン等を組 付けることは難しく、また、その部分のクランク軸部を２分割し前記カラーに圧 入して連結するにしても、カラーは薄肉であるので連結することは難しく、カラ ーを厚肉にしたとしても、その外周にラビリンスパッキンを介装しなければなら ないために、強度充分な厚肉にすることはできない、といった不具合を呈してい る。 However, as in the conventional example, there is only one crankshaft between both crank chambers. In this structure, bearings, collars, labyrinth packing, etc. are assembled between both crank chambers. It is difficult to attach, and it is also difficult to divide the crankshaft in that area into two and press it against the collar. Even if the collars are inserted and connected, it is difficult to connect them because the collars are thin. Even if the wall is made thicker, a labyrinth packing must be inserted around its outer periphery. Because of this, there is a problem that it is not possible to make the wall thick enough to have sufficient strength. Ru.
【０００４】0004
本考案は、そのような不具合を解決し、しかも有効にラビリンス効果をもたせ た簡単な構造にして好適に実施できるよう工夫したものであり、そのため、両ク ランク室の間に延出する両クランク軸の軸部の少なくとも一方を両クランク室間 の円周支持面にベアリングを介して軸架するとともに、該ベアリングと略同じ厚 さを有して該ベアリングに並設するガイドパイプには前記両軸部を圧入して一体 的に連結し、前記円周支持面に近接する前記ガイドパイプの外周面には多数の円 周溝を形成して構成したものである。 The present invention solves such problems and effectively creates a labyrinth effect. It has been devised to have a simple structure and be suitable for implementation. At least one of the shaft parts of both crankshafts extending between the two crank chambers is connected between the two crank chambers. The shaft is mounted on the circumferential support surface of the bearing via a bearing, and the thickness is approximately the same as the bearing. Both shaft parts are press-fitted into the guide pipe, which is arranged in parallel with the bearing, and integrated into the guide pipe. The guide pipe has a large number of circles on its outer circumferential surface adjacent to the circumferential support surface. It is constructed by forming a circumferential groove.
【０００５】[0005]
したがって、少なくとも一方の軸部にベアリングを嵌装して、両クランク軸の 軸部をガイドパイプに圧入すると、簡単に組付けることができることになり、ク ランク軸とともに回転するガイドパイプの外周面の円周溝が円周支持面に近接し ながら、両クランク室間をシールするラビリンス効果を発揮できることになる。 Therefore, by fitting a bearing to at least one shaft, both crankshafts Press-fitting the shaft into the guide pipe allows for easy assembly and The circumferential groove on the outer circumferential surface of the guide pipe that rotates with the rank shaft is close to the circumferential support surface. However, the labyrinth effect of sealing between both crank chambers can be achieved.
【０００６】[0006]
図１は刈払機のエンジン部の側断面図を示し、外周面にフイン９を有するとと もにピストン１０ａ、１０ｂを内装した排気量が少ない２サイクルの両シリンダ １、２を平行直列に並設し、両シリンダ１、２の下方のクランク室１ａ、２ａに は前記ピストン１０ａ、１０ｂに連結するクランク軸３、４をそれぞれ軸架する が、両クランク軸３、４間の軸部を軸部３ａ、４ａに分断して形成し、一方の軸 部３ａを両クランク室１ａ、２ａ間の円周支持面５にベアリング６を介して軸架 し、該ベアリング６と略同じ厚さを有して該ベアリング６に並設するガイドパイ プ７には前記両軸部３ａ、４ａを圧入して一体的に連結し、前記円周支持面５に 近接する前記ガイドパイプ７の外周面には多数の円周溝８を形成して構成する。 FIG. 1 shows a side sectional view of the engine section of a brush cutter, which has fins 9 on the outer peripheral surface. Two-stroke cylinder with a small displacement and internal pistons 10a and 10b. 1 and 2 are arranged in parallel and in series, and the crank chambers 1a and 2a are located below both cylinders 1 and 2. mounts the crankshafts 3 and 4 connected to the pistons 10a and 10b, respectively. However, the shaft part between both crankshafts 3 and 4 is divided into shaft parts 3a and 4a, and one shaft The part 3a is mounted on the circumferential support surface 5 between the two crank chambers 1a and 2a via a bearing 6. and a guide pipe having approximately the same thickness as the bearing 6 and installed in parallel with the bearing 6. Both shaft portions 3a and 4a are press-fitted into the pipe 7 and connected integrally to the circumferential support surface 5. A large number of circumferential grooves 8 are formed on the outer peripheral surface of the adjacent guide pipes 7.
【０００７】 また、前記クランク軸４の後方軸部４ｂ側にはリコイルスタータ部１１を伝動 連結し、前記クランク軸３の前方軸部３ｂにはフアン１２およびクラッチシュー １３を有したフライホイル１４を軸架し、前方のクラッチケース１５の内部には 、前記クラッチシュー１３に内接するとともに刈刃駆動軸１６を駆動するクラッ チドラム１７を軸架し、前記クラッチケース１５の後部上方から両シリンダ１、 ２の上方にかけてエンジンカバー１８を被着し、両シリンダ１、２の下方には燃 料タンク１９を装備するとともに、両シリンダ１、２の両側方には気化器部２０ およびマフラー部２１をそれぞれ装備し、前記クラッチケース１５より前方に延 出する操作桿（図示省略）の前端側には前記刈刃駆動軸１６には駆動する刈刃を 装備して、従来形同様の刈払機を構成する。[0007] Further, a recoil starter section 11 is connected to the rear shaft section 4b side of the crankshaft 4. A fan 12 and a clutch shoe are connected to the front shaft portion 3b of the crankshaft 3. A flywheel 14 with 13 is mounted on the shaft, and inside the front clutch case 15 there is a , a clutch which is inscribed in the clutch shoe 13 and which drives the cutting blade drive shaft 16. The head drum 17 is mounted on a shaft, and both cylinders 1, An engine cover 18 is placed over the cylinders 1 and 2. In addition to being equipped with a fuel tank 19, carburetor parts 20 are installed on both sides of both cylinders 1 and 2. and a muffler part 21, extending forward from the clutch case 15. On the front end side of the operating rod (not shown), the cutting blade drive shaft 16 has a cutting blade to be driven. When equipped, a brush cutter similar to the conventional type is constructed.
【０００８】 したがって、一方の軸部３ａにベアリング６を嵌装して、両クランク軸３、４ の軸部３ａ、４ａをガイドパイプ７に圧入すると、両クランク軸３、４を簡単に 組付けて軸架させることができることになり、軸部３ａ、４ａとともに回転する ことになるガイドパイプ７の外周面の円周溝８が円周支持面５に近接しながら、 両クランク室１ａ、２ａ間をシールするラビリンス効果を発揮できることになる 。[0008] Therefore, by fitting the bearing 6 to one shaft portion 3a, both crankshafts 3, 4 By press-fitting the shaft parts 3a and 4a into the guide pipe 7, both crankshafts 3 and 4 can be easily connected. This means that it can be assembled and mounted on a shaft, and rotates together with the shaft parts 3a and 4a. While the circumferential groove 8 on the outer peripheral surface of the guide pipe 7 approaches the circumferential support surface 5, A labyrinth effect can be achieved that seals between the two crank chambers 1a and 2a. .
【０００９】[0009]
このように本考案は、両クランク軸３、４の軸部３ａ、４ａの少なくとも一方 にベアリング６を嵌装するとともに、両軸部３ａ、４ａをガイドパイプ７に圧入 することによって簡単に組付けることができることになり、軸部３ａ、４ａとと もに回転するガイドパイプ７の外周面の円周溝８が円周支持面５に近接しながら ラビリンス効果を発揮して両クランク室１ａ、２ａ間を確実良好にシールできる ことになり、両クランク室１ａ、２ａ間を、軸連結やラビリンス効果を有効に発 揮できて製作も容易となる簡単な構造にして、２サイクル多気筒エンジンで好適 に実施できる特長を有する。 In this way, the present invention provides at least one of the shaft portions 3a, 4a of both crankshafts 3, 4. At the same time, fit the bearing 6 into the guide pipe 7 and press-fit both shaft parts 3a and 4a into the guide pipe 7. By doing so, it can be easily assembled, and the shaft parts 3a, 4a and While the circumferential groove 8 on the outer circumferential surface of the guide pipe 7 that rotates is close to the circumferential support surface 5, Demonstrates a labyrinth effect and can reliably seal between both crank chambers 1a and 2a. Therefore, the shaft connection and labyrinth effect can be effectively created between the two crank chambers 1a and 2a. It has a simple structure that is easy to operate and manufacture, and is suitable for 2-stroke multi-cylinder engines. It has the advantage of being able to be implemented in many ways.
【図１】本考案の実施例であるエンジン部を示した断面
図である。FIG. 1 is a sectional view showing an engine section according to an embodiment of the present invention.
【図２】図１の一部を示した平面図である。FIG. 2 is a plan view showing a part of FIG. 1;
【図３】エンジン部全体を示した側面図である。FIG. 3 is a side view showing the entire engine section.
【図４】エンジン部全体を示した正面図である。FIG. 4 is a front view showing the entire engine section.
１ シリンダ ２ シリンダ ３ クランク軸 ４ クランク軸 １ａ クランク室 ２ａ クランク室 ３ａ 軸部 ４ａ 軸部 ５ 円周支持面 ６ ベアリング ７ ガイドパイプ ８ 円周溝 1 cylinder 2 cylinders 3 Crankshaft 4 Crankshaft 1a Crank chamber 2a Crank chamber 3a Shaft part 4a Shaft part 5 Circumferential support surface 6 Bearing 7 Guide pipe 8 Circumferential groove
Claims (1)
ランク室１ａ、２ａにクランク軸３、４をそれぞれ軸架
して構成する２サイクル多気筒エンジンにおいて、両ク
ランク室１ａ、２ａの間に延出する両クランク軸３、４
の軸部３ａ、４ａの少なくとも一方を両クランク室１
ａ、２ａ間の円周支持面５にベアリング６を介して軸架
するとともに、該ベアリング６と略同じ厚さを有して該
ベアリング６に並設するガイドパイプ７には前記両軸部
３ａ、４ａを圧入して一体的に連結し、前記円周支持面
５に近接する前記ガイドパイプ７の外周面には多数の円
周溝８を形成して構成したことを特徴とするクランク軸
連結構造。Claim 1: In a two-stroke multi-cylinder engine configured by mounting crankshafts 3 and 4 in both crank chambers 1a and 2a below both cylinders 1 and 2 arranged in parallel, Both crankshafts 3, 4 extending between
At least one of the shaft portions 3a, 4a of the crank chamber 1
The guide pipe 7 is mounted on the circumferential support surface 5 between a and 2a via a bearing 6, and has approximately the same thickness as the bearing 6, and is provided in parallel with the bearing 6. , 4a are press-fitted and integrally connected, and a number of circumferential grooves 8 are formed on the outer circumferential surface of the guide pipe 7 adjacent to the circumferential support surface 5. structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1991058639U JP2566675Y2 (en) | 1991-04-23 | 1991-04-23 | Crankshaft connection structure for two-cycle multi-cylinder engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1991058639U JP2566675Y2 (en) | 1991-04-23 | 1991-04-23 | Crankshaft connection structure for two-cycle multi-cylinder engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04122810U true JPH04122810U (en) | 1992-11-05 |
| JP2566675Y2 JP2566675Y2 (en) | 1998-03-30 |
Family
ID=31929955
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1991058639U Expired - Fee Related JP2566675Y2 (en) | 1991-04-23 | 1991-04-23 | Crankshaft connection structure for two-cycle multi-cylinder engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2566675Y2 (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5947516A (en) * | 1982-10-20 | 1984-03-17 | Honda Motor Co Ltd | Two-cycle 3-cylindered internal-combustion engine |
| JPS5956413U (en) * | 1982-10-06 | 1984-04-13 | スズキ株式会社 | Engine assembly type crankshaft |
| JPS6279913U (en) * | 1985-11-06 | 1987-05-22 |
-
1991
- 1991-04-23 JP JP1991058639U patent/JP2566675Y2/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5956413U (en) * | 1982-10-06 | 1984-04-13 | スズキ株式会社 | Engine assembly type crankshaft |
| JPS5947516A (en) * | 1982-10-20 | 1984-03-17 | Honda Motor Co Ltd | Two-cycle 3-cylindered internal-combustion engine |
| JPS6279913U (en) * | 1985-11-06 | 1987-05-22 |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2566675Y2 (en) | 1998-03-30 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |