JPH0754656Y2 - Crankshaft - Google Patents
CrankshaftInfo
- Publication number
- JPH0754656Y2 JPH0754656Y2 JP1989063721U JP6372189U JPH0754656Y2 JP H0754656 Y2 JPH0754656 Y2 JP H0754656Y2 JP 1989063721 U JP1989063721 U JP 1989063721U JP 6372189 U JP6372189 U JP 6372189U JP H0754656 Y2 JPH0754656 Y2 JP H0754656Y2
- Authority
- JP
- Japan
- Prior art keywords
- end wall
- cylindrical member
- peripheral surface
- eccentric
- crankshaft
- 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
Description
【考案の詳細な説明】 〔考案の目的〕 （産業上の利用分野） 本考案は、ロータリーコンプレッサ等に用いるクランク
シャフトに関する。DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Field of Industrial Application) The present invention relates to a crankshaft used in a rotary compressor or the like.
（従来の技術） 従来、ロータリーコンプレッサのクランクシャフトとし
ては、屈曲した中空軸に中実の偏心ロータを嵌合したも
の（例えば実開昭58−101018号公報）等が知られてい
る。(Prior Art) Conventionally, as a crankshaft of a rotary compressor, one in which a solid eccentric rotor is fitted to a bent hollow shaft (for example, Japanese Utility Model Laid-Open No. 58-101018) is known.
（考案が解決しようとする課題） しかるに上記従来のクランクシャフトでは、偏心ロータ
が中実となっているために偏心ロータの重量が重くなる
のでバランスが悪く、したがって、コンプレッサの効率
も低下する等の問題があった。(Problems to be solved by the invention) However, in the above-mentioned conventional crankshaft, since the eccentric rotor is solid, the weight of the eccentric rotor is heavy and the balance is poor. Therefore, the efficiency of the compressor is reduced. There was a problem.
本考案はこれに鑑み、重量が軽くバランスのよいクラン
クシャフトを提供することを目的とする。In view of this, the present invention has an object to provide a crankshaft that is light in weight and well-balanced.
（課題を解決するための手段） 上記従来技術の課題を解決するため本考案は、パイプ材
に偏心ロータを外嵌して形成するクランクシャフトにお
いて、パイプ材よりなるシャフト部材と、偏肉厚に形成
したパイプ材よりなる円筒部材と、この円筒部材の両端
部を閉塞する端壁部材とを有し、この端壁部材側面の偏
心位置に形成した孔部へ前記シャフト部材を嵌入すると
ともにこのシャフト部材の軸心に対する前記端壁部材の
最大偏心側を前記円筒部材の最小肉厚側として前記端壁
部材へ前記円筒部材を嵌入し、前記シャフト部材の外周
面と前記端壁部材孔部の内周面および前記円筒部材の内
周面と前記端壁部材の外周面とをかしめにより圧接固定
してなり、前記円筒部材の薄肉側の内部に空洞部を形成
したことを特徴とするものである。(Means for Solving the Problems) In order to solve the above-mentioned problems of the conventional technology, the present invention is directed to a crankshaft formed by externally fitting an eccentric rotor to a pipe material, and a shaft member made of the pipe material and an uneven thickness. The shaft member has a cylindrical member made of a formed pipe material and an end wall member that closes both end portions of the cylindrical member, and the shaft member is fitted into a hole formed at an eccentric position on the side surface of the end wall member and the shaft. The cylindrical member is fitted into the end wall member with the maximum eccentric side of the end wall member with respect to the axis of the member as the minimum thickness side of the cylindrical member, and the outer peripheral surface of the shaft member and the end wall member hole portion The peripheral surface and the inner peripheral surface of the cylindrical member and the outer peripheral surface of the end wall member are crimped and fixed by caulking, and a hollow portion is formed inside the thin side of the cylindrical member. .
（作用） 上記の構成により、シャフト部材の軸心に対する端壁部
材の最小偏心側を円筒部材の最小肉厚側とし、端壁部材
の偏心位置の孔部へシャフト部材を嵌入して円筒部材の
薄肉側の内部に空胴部を設けたことによって、偏心回転
でありながら偏心ロータの周方向各位置の回転モーメン
トが可及的均一なバランスのよいクランクシャフトとな
る。(Operation) With the above configuration, the minimum eccentric side of the end wall member with respect to the axis of the shaft member is set to the minimum wall thickness side of the cylindrical member, and the shaft member is fitted into the hole at the eccentric position of the end wall member so that the cylindrical member By providing the hollow portion inside the thin side, the crankshaft is eccentrically rotated, but the rotational moments at the circumferential positions of the eccentric rotor are as uniform as possible and well balanced.
（実施例） 以下、本考案を第１図乃至第５図に示す実施例を参照し
て説明する。(Embodiment) Hereinafter, the present invention will be described with reference to an embodiment shown in FIGS. 1 to 5.
図において、クランクシャフト１は、シャフト部材２
と、端壁部材3,3と、円筒部材４とで構成されており、
シャフト部材２は、パイプ材よりなり、その中央部と端
部との間には縮径部５が形成されている。In the figure, a crankshaft 1 is a shaft member 2
And the end wall members 3, 3 and the cylindrical member 4,
The shaft member 2 is made of a pipe material, and a reduced diameter portion 5 is formed between the central portion and the end portion.
端壁部材３は、板材により円板状に形成され、側面の偏
心位置にはシャフト部材２の縮径部５の外径に相当する
直径を有する孔部６が形成されている。そして、端壁部
材３の外周面と孔部６の内周面には第３図に示すように
ローレット７が切られている。The end wall member 3 is formed of a plate material into a disc shape, and a hole portion 6 having a diameter corresponding to the outer diameter of the reduced diameter portion 5 of the shaft member 2 is formed at an eccentric position on the side surface. A knurl 7 is cut on the outer peripheral surface of the end wall member 3 and the inner peripheral surface of the hole 6, as shown in FIG.
また、円筒部材４は、パイプ材よりなり、偏肉厚に形成
されている。The cylindrical member 4 is made of a pipe material and has an uneven thickness.
次にクランクシャフト１の製造工程について説明する。Next, the manufacturing process of the crankshaft 1 will be described.
まず、第４図に示すようにシャフト部材２の端壁部材3,
3の嵌入される位置から一方側の端部までに縮径部５を
形成し、この縮径部５に端壁部材３の孔部６を嵌入す
る。ついで、シャフト部材の軸心に対する端壁部材３の
最大偏心側８を円筒部材４の最小肉厚側９として端壁部
材3,3に円筒部材４を嵌入する。そして、同図に示すよ
うにシャフト部材２の縮径部５の内面に心金10を挿入
し、円筒部材４の外周面をローラ11で転動押圧すること
により端壁部材３外周面のローレット７と円筒部材４の
内周面および端壁部材３の孔部６のローレット７とシャ
フト部材２の縮径部５の外周面とがかしめられて圧接固
定され、円筒部材４の薄肉側12の内部に空胴部13が形成
されている。しかるのち、心金10を引抜きシャフト部材
２の右側（第４図における右側）へパイプ材の内径に相
当する直径を有する心金（図示せず）を圧入して拡径す
ることによりクランクシャフト１が完成される。First, as shown in FIG. 4, the end wall member 3 of the shaft member 2,
The reduced diameter portion 5 is formed from the position where the 3 is inserted to the end portion on one side, and the hole portion 6 of the end wall member 3 is inserted into the reduced diameter portion 5. Then, the cylindrical member 4 is fitted into the end wall members 3, 3 with the maximum eccentric side 8 of the end wall member 3 with respect to the axis of the shaft member being the minimum thickness side 9 of the cylindrical member 4. Then, as shown in the figure, a mandrel 10 is inserted into the inner surface of the reduced diameter portion 5 of the shaft member 2 and the outer peripheral surface of the cylindrical member 4 is rotatably pressed by a roller 11 to knurl the outer peripheral surface of the end wall member 3. 7 and the inner peripheral surface of the cylindrical member 4 and the knurl 7 of the hole 6 of the end wall member 3 and the outer peripheral surface of the reduced diameter portion 5 of the shaft member 2 are caulked and fixed by pressure to fix the thin wall side 12 of the cylindrical member 4. A cavity 13 is formed inside. Thereafter, the mandrel 10 is pulled out, and a mandrel (not shown) having a diameter corresponding to the inner diameter of the pipe material is press-fitted into the right side (the right side in FIG. 4) of the shaft member 2 to expand the crankshaft 1 Is completed.
なお、端壁部材３の外周面と孔部６の内周面にはローレ
ット７を切るものとしたが、軸線方向の溝あるいは螺旋
状の溝を形成してもよく、また、円筒部材４については
偏肉厚に形成したものについて説明したが、第５図に示
すように上半部を厚肉、下半部を薄肉としたものでもよ
く、これらに限定されるものではない。Although the knurls 7 are cut on the outer peripheral surface of the end wall member 3 and the inner peripheral surface of the hole portion 6, an axial groove or a spiral groove may be formed. However, the upper half part may be thicker and the lower half part may be thin as shown in FIG. 5, and the invention is not limited to these.
以上説明したように本考案は、端壁部材側面の偏心位置
の孔部へシャフト部材を嵌入するとともにこのシャフト
部材の軸心に対する端壁部材の最大偏心側を円筒部材の
最小肉厚側として端壁部材へパイプ材よりなる円筒部材
を嵌入して、シャット部材の外周面と孔部の内周面およ
び円筒部材の内周面と端壁部材の外周面とをかしめによ
り圧接固定して円筒部材の薄肉側の内部を空胴部とした
ので、偏心部分の重量が軽くでき、また、偏心ロータの
バランスをよくし、偏心ロータの周方向各位置の回転モ
ーメントを出来るだけ均一とするために円筒部材の肉厚
をシャフト部材の軸心に対する円筒部材の最大偏心側を
薄肉とし、最小偏心側を厚肉としたことにより、偏心回
転するものであってもバランスのよい回転モーメントが
均一なクランクシャフトを安価に得ることができる効果
を奏する。As described above, according to the present invention, the shaft member is inserted into the hole at the eccentric position on the side surface of the end wall member, and the maximum eccentric side of the end wall member with respect to the axis of the shaft member is defined as the minimum wall thickness side of the cylindrical member. A cylindrical member made of a pipe material is fitted into the wall member, and the outer peripheral surface of the shut member, the inner peripheral surface of the hole portion, and the inner peripheral surface of the cylindrical member and the outer peripheral surface of the end wall member are pressed and fixed by caulking. Since the inside of the thin side of the is a hollow part, the weight of the eccentric part can be reduced, and the balance of the eccentric rotor is improved and the rotational moment at each position in the circumferential direction of the eccentric rotor is made as uniform as possible. By making the wall thickness of the member thin on the maximum eccentric side of the cylindrical member with respect to the shaft center of the shaft member and thick on the minimum eccentric side, a crankshaft with a well-balanced rotational moment even with eccentric rotation can be obtained. An effect can be obtained shift inexpensively.
第１図は、本考案のクランクシャフトの一実施例を示す
斜視図、第２図は、第１図の縦断側面図、第３図は、本
考案のクランクシャフトの端壁部材の一実施例を示す斜
視図、第４図は、本考案のクランクシャフトの製造工程
の説明図、第５図は円筒部材の他の実施例を示す斜視図
である。 １…クランクシャフト、２…シャフト部材、３…端壁部
材、４…円筒部材、７…ローレット、３…空胴部。FIG. 1 is a perspective view showing an embodiment of the crankshaft of the present invention, FIG. 2 is a vertical side view of FIG. 1, and FIG. 3 is an embodiment of an end wall member of the crankshaft of the present invention. FIG. 4 is a perspective view showing the manufacturing process of the crankshaft of the present invention, and FIG. 5 is a perspective view showing another embodiment of the cylindrical member. 1 ... Crank shaft, 2 ... Shaft member, 3 ... End wall member, 4 ... Cylindrical member, 7 ... Knurl, 3 ... Cavity part.
Claims (1)
クランクシャフトにおいて、パイプ材よりなるシャフト
部材と、偏肉厚に形成したパイプ材よりなる円筒部材
と、この円筒部材の両端部を閉塞する端壁部材とを有
し、この端壁部材側面の偏心位置に形成した孔部へ前記
シャフト部材を嵌入するとともにこのシャフト部材の軸
心に対する前記端壁部材の最大偏心側を前記円筒部材の
最小肉厚側として前記端壁部材へ前記円筒部材を嵌入
し、前記シャフト部材の外周面と前記端壁部材孔部の内
周面および前記円筒部材の内周面と前記端壁部材の外周
面とをかしめにより圧接固定してなり、前記円筒部材の
薄肉側の内部に空洞部を形成したことを特徴とするクラ
ンクシャフト。1. A crankshaft formed by externally fitting an eccentric rotor to a pipe material, wherein a shaft member made of the pipe material, a cylindrical member made of the pipe material having an eccentric thickness, and both ends of the cylindrical member are provided. An end wall member to be closed, the shaft member is fitted into a hole formed at an eccentric position on the side surface of the end wall member, and the maximum eccentric side of the end wall member with respect to the axial center of the shaft member is the cylindrical member. The cylindrical member is fitted into the end wall member as the minimum wall thickness side of the shaft member, the outer peripheral surface of the shaft member and the inner peripheral surface of the hole portion of the end wall member, and the inner peripheral surface of the cylindrical member and the outer periphery of the end wall member. A crankshaft, characterized in that the surface is crimped and fixed by caulking, and a hollow portion is formed inside the thin side of the cylindrical member.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1989063721U JPH0754656Y2 (en) | 1989-05-31 | 1989-05-31 | Crankshaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1989063721U JPH0754656Y2 (en) | 1989-05-31 | 1989-05-31 | Crankshaft |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH032915U JPH032915U (en) | 1991-01-11 |
| JPH0754656Y2 true JPH0754656Y2 (en) | 1995-12-18 |
Family
ID=31594021
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1989063721U Expired - Lifetime JPH0754656Y2 (en) | 1989-05-31 | 1989-05-31 | Crankshaft |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0754656Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007330106A (en) * | 2006-06-12 | 2007-12-27 | Toppan Printing Co Ltd | Mosquito-repellent tool for exclusive use of animal |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62124316U (en) * | 1986-01-30 | 1987-08-07 | ||
| JPS63214516A (en) * | 1987-03-02 | 1988-09-07 | Mazda Motor Corp | Hollow output shaft for engine |
-
1989
- 1989-05-31 JP JP1989063721U patent/JPH0754656Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH032915U (en) | 1991-01-11 |
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