WO2005090801A1 - クランクシャフト及びその製法 - Google Patents
クランクシャフト及びその製法 Download PDFInfo
- Publication number
- WO2005090801A1 WO2005090801A1 PCT/JP2004/007352 JP2004007352W WO2005090801A1 WO 2005090801 A1 WO2005090801 A1 WO 2005090801A1 JP 2004007352 W JP2004007352 W JP 2004007352W WO 2005090801 A1 WO2005090801 A1 WO 2005090801A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- crankshaft
- journal
- pin
- shaft
- arm
- Prior art date
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C3/00—Shafts; Axles; Cranks; Eccentrics
- F16C3/04—Crankshafts, eccentric-shafts; Cranks, eccentrics
- F16C3/06—Crankshafts
- F16C3/10—Crankshafts assembled of several parts, e.g. by welding by crimping
Definitions
- the present invention relates to a crankshaft having a novel structure and used for an automobile engine or the like, and a method for manufacturing the same.
- a small crankshaft for an automobile engine or the like may be manufactured by a manufacturing method using a triangle shape. According to the construction method, it is possible to reduce the weight by partially forming a hollow structure due to the characteristics of this technique.
- crankshafts that require higher strength characteristics are made by a forging method using a forging die.
- the three components of the crankshaft, the journal (main shaft), the pin, and the arm, are forged in an integrated form.
- the bearing provided on the other end of the bearing supporting the journal and the connecting rod connected at one end to the engine cylinder are provided around the shaft. It had to be divided into two parts in the direction.
- crankshaft having an integral structure as described above is manufactured using a forging die
- the bearing supporting the journal and the bearing on the connecting rod side to be axially fitted to the pin each have a two-part structure, so that the sliding resistance of the sliding surface between the shaft and the bearing is increased, and smooth rotation is achieved. Rolling is hindered, and in the case of an automobile engine, the running performance and fuel efficiency are deteriorated. Further, the complexity of the bearing assembly structure increases the manufacturing cost, assembly cost, and weight.
- an object of the present invention is to achieve a reduction in weight while securing the required strength, and at the same time, to significantly reduce the manufacturing cost and to further smoothly rotate the bearing portion.
- the present invention provides a crankshaft having a novel structure and a method for manufacturing the same.
- a crankshaft according to the present invention relates to a crankshaft having a structure in which a journal and a pin, each of which has a different axis, are connected via an arm.
- the journal and the pin each made separately, have connecting shafts extending at the respective shaft ends, and these connecting shafts are fitted shafts provided on the separately made arms. It is characterized by being fitted into the hole by fitting means.
- the connecting shaft may be fixed to the fitting shaft hole in a fitted state by shrinkage fitting or cooling fitting.
- the outer peripheral surface of the connecting shaft and the inner peripheral surface of the fitting shaft hole are formed as conical surfaces that are fitted in a tightly fitted state, and the journal and the pin are formed as hollow shafts.
- the connecting shaft and the arm may be connected to each other by welding means at a contacting point between the two.
- an aluminum alloy or a titanium alloy may be used as a material of the crankshaft.
- a method of manufacturing a crankshaft according to the present invention is a crankshaft having a structure in which a journal and a pin having respective axes arranged in steps are connected via an arm. , Pins, and arms are separately manufactured and assembled in such a manner that they are connected to each other, and the arms are manufactured through hot forging, hot coining, and trimming processes. And Prior to connecting the journal, pin, and arm to each other in the form of a crankshaft, the journal is provided with a ring-shaped bearing for supporting the journal, and the pin is provided with a connecting rod connected to the cylinder. It is also characterized in that a step of extrapolating the ring-shaped bearing from each shaft end is added.
- crankshaft and the manufacturing method according to the present invention are a related art that is made into an integral structure by forging. It has the following advantages as compared to (A) It is unnecessary to use an expensive forging die having a complicated shape for integrally molding the entire crankshaft. (b) Since the crankshaft is assembled from the journal, pin, and arm, each made separately, only a forging die for forming the arm is sufficient. (C) Therefore, the production cost of the forging die can be remarkably reduced, and the problem of increasing the product weight due to the provision of the draft angle is also significantly reduced. (D) Further, the design change of the crankshaft becomes easier.
- journal and pin can be made of a pipe material, a considerable reduction in molding cost and weight reduction can be achieved.
- the hollow portion of the journal and pin also serves as a supply path for lubricating oil to the journal and pin.
- the assembling work of the crankshaft is simple, quick and easy because the connecting shafts extending to the shaft ends of the journal and pin are simply shrunk or cooled in the fitting shaft holes provided in the arm. , Accurate.
- the material of the crankshaft is an aluminum alloy or a material excellent in abrasion resistance despite having a much lower specific gravity than iron used for a conventional forged crankshaft.
- the use of titanium alloys makes it possible to significantly reduce the weight of the product and significantly improve the response characteristics of the engine.
- the arm which also plays a role as a balancer for smoothly rotating the crankshaft, is manufactured through hot forging, hot coining, and trimming processes to achieve high dimensional accuracy. Mass production is possible.
- the journal, pin and arm are connected in the form of a crankshaft.
- the journal Prior to merging, the journal has a ring-shaped bearing for its support, and the pin has a ring-shaped bearing for the connecting rod, It can be extended from each shaft end.
- K Therefore, a ring-shaped rolling bearing or a plain bearing can be used in place of the bipartite structure plain bearing which had to be used in the prior art.
- N Naturally, the high dimensional accuracy required to smoothly rotate the crankshaft can be easily obtained, so that even if the work of balancing the crankshaft is simplified or not performed, a uniform good product can be obtained. Mass production is possible.
- crankshafts (m) Generally speaking, the cost of manufacturing crankshafts is significantly reduced compared to Significant weight reduction can be achieved.
- FIG. 1 is a partial perspective view of a crankshaft A having a general form for an automobile engine.
- FIG. 2 is a partially broken front view showing a schematic configuration of a crankshaft according to the present invention
- FIG. 3 is a side view of the right end side of FIG.
- FIG. 4 is a perspective view illustrating the overall shape of the pin.
- crankshaft As shown in Figs. 1 and 2, the basic configuration of the crankshaft is such that a journal (main shaft) 1 in which the respective axes are arranged in a stepped manner and a pin 2 are interposed via an arm 3. It is provided with a form of connection.
- the arm 3 is integrally formed with a balancer portion 3a for smooth rotation of the crankshaft.
- FIGS. 1 and 2 the overall shape force of the arm 3 is shown in FIG. Somewhat different, including
- crankshaft is not integrally formed by forging, as in the prior art, but a plurality of journals 1, pins 2, and a plurality of components, which are components of the crankshaft.
- Each of the arms 3 is individually manufactured as an independent part, and a plurality of these parts are connected to each other in the form of a crankshaft by a fitting technique.
- the journals 1 and the pins 2 as independent parts are provided with connecting shafts 4 and 5 protruding from both shaft ends or one shaft end, respectively.
- the arm 3 as an independent part has fitting shaft holes 6 and 7 for tightly fitting the connecting shafts 4 and 5.
- connection shafts 4 and 5 and the inner peripheral surfaces of the fitting shaft holes 6 and 7 are formed as conical surfaces that fit tightly with each other.
- the taper angle is exaggerated so that it is easy to recognize the conical surface, but in reality, the taper angle is gentler than the angle shown.
- the arm 3 is made by a hot forging method. In order to rotate the crankshaft smoothly, it is necessary to increase the dimensional accuracy of each part of the arm 3 as much as possible. Therefore, after hot forging, hot coining is performed immediately, and trimming is performed. If the work immediately after hot forging is placed in a closed mold and pressed for stamping, the uneven shape of the mold surface can be efficiently and accurately transferred.
- journal 1 and the pin 2 are formed in a hollow shaft shape and the hollow portion a is provided to achieve a light weight.
- the hollow shaft-shaped journal 1 and pin 2 with the connecting shafts 4 and 5 integrally extended at the respective shaft ends can be made of pipe material, so while maintaining the required high dimensional accuracy, Easy- Rapid mass production.
- a tire portion is attached to a boss portion of a wheel of a railway vehicle. It uses the same technology as the one used for shrinking, which also has excellent work efficiency.
- the connecting shafts 4 and 5 of the journal 1 and the pin 2 are fitted into the fitting shaft holes 6 and 7 of the arm 3 which has been heated to a predetermined temperature and which has been previously expanded in diameter. Further, when the arm 3 is cooled, the three members of the journal 1, the pin 2, and the arm 3 are firmly united in a state where the required bonding strength is secured.
- another well-known fitting technique such as chilling may be used.
- connection shafts 4 and 5 and the shaft holes 6 and 7 for fitting are required merely by depending on the fitting means. It can happen that the level is not reached. In this case, as shown in FIG. 2, it is preferable to weld a portion where the connecting shafts 4 and 5 and the arm 3 come into contact with each other to form a welding point b.
- crankshaft is formed as an integral structure
- the bearing for supporting the journal and the bearing on the connecting rod side which is axially fitted to the pin.
- the structure must be divided into two in the direction around the axis.
- crankshaft of the present invention forms the journal 1, the pin 2, and the arm 3 separately and then fits the three. By means, it is connected and united in the form of a cranta shaft.
- journal 1 is provided with a supporting ring.
- a pin-shaped bearing (not shown) can be externally inserted from its shaft end, and the pin 2 can be externally inserted from its shaft end with a connecting rod ring-shaped bearing (not shown) connected to the cylinder. .
- the bearing is divided into two parts in the direction around the axis, so that it is not necessary to use a bearing which is troublesome to manufacture and assemble and has a disadvantage of increasing the weight. Since a ring-shaped bearing does not have a dividing line on its inner peripheral surface (sliding surface), the crankshaft, which has less sliding resistance, can be rotated more smoothly. And it becomes easy to incorporate ball bearings and mouth bearings.
- iron steel is used as the material of the crankshaft.
- the arm 3 is manufactured by a forging method. These metals have excellent wear resistance, despite having a much lower specific gravity than iron, so the crankshaft weight must be significantly reduced while maintaining the required durability. Can be done.
- FIG. 1 is a view showing an example of a shape of a crankshaft, and is a partial perspective view of a cranker shaft for an automobile engine.
- FIG. 2 is a partial front view schematically showing a crankshaft as one embodiment of the present invention, partially cut away.
- FIG. 3 is an end view of the right side of FIG.
- FIG. 4 is a perspective view of a pin having a connecting shaft integrally extended therefrom at the shaft end.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Ocean & Marine Engineering (AREA)
- Mechanical Engineering (AREA)
- Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2006511117A JPWO2005090801A1 (ja) | 2004-03-24 | 2004-05-28 | クランクシャフト及びその製法 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004086777 | 2004-03-24 | ||
JP2004-086777 | 2004-03-24 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2005090801A1 true WO2005090801A1 (ja) | 2005-09-29 |
Family
ID=34993774
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2004/007352 WO2005090801A1 (ja) | 2004-03-24 | 2004-05-28 | クランクシャフト及びその製法 |
Country Status (2)
Country | Link |
---|---|
JP (2) | JPWO2005090801A1 (ja) |
WO (1) | WO2005090801A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2011163499A (ja) * | 2010-02-12 | 2011-08-25 | Kondo Kosakusho Co Ltd | 自動車エンジン用の組立式クランクシャフトおよび組立方法 |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3133309U (ja) * | 2007-04-26 | 2007-07-05 | 株式会社 近藤工作所 | 自動車エンジン用のクランクシャフト |
JP5265714B2 (ja) * | 2011-02-02 | 2013-08-14 | 本田技研工業株式会社 | クランクシャフト及びその製造方法 |
JP7464345B2 (ja) | 2020-12-25 | 2024-04-09 | ダイハツ工業株式会社 | モノブロック式内燃機関 |
Citations (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS513758U (ja) * | 1974-06-24 | 1976-01-12 | ||
JPS56102822U (ja) * | 1980-01-10 | 1981-08-12 | ||
JPH044519U (ja) * | 1990-04-27 | 1992-01-16 | ||
JPH04282012A (ja) * | 1990-11-12 | 1992-10-07 | Man B & W Diesel As | 内燃機関用クランク軸 |
JPH058023U (ja) * | 1991-07-11 | 1993-02-02 | 克義 建内 | クランクシヤフト |
JPH05215123A (ja) * | 1992-02-06 | 1993-08-24 | Honda Motor Co Ltd | クランクシャフトの製造方法 |
JPH06200919A (ja) * | 1992-11-06 | 1994-07-19 | Audi Ag | 内燃機関の組立式クランク軸の製造方法およびそのクランク軸 |
JPH07259838A (ja) * | 1994-03-16 | 1995-10-09 | Mitsubishi Materials Corp | クランクシャフトの製造方法 |
JP2000283141A (ja) * | 1999-03-29 | 2000-10-13 | Honda Motor Co Ltd | 2サイクル多気筒エンジン用クランクシャフト |
JP2003254319A (ja) * | 2002-03-05 | 2003-09-10 | Suzuki Motor Corp | エンジンのクランク軸構造 |
-
2004
- 2004-05-28 WO PCT/JP2004/007352 patent/WO2005090801A1/ja active Application Filing
- 2004-05-28 JP JP2006511117A patent/JPWO2005090801A1/ja active Pending
-
2006
- 2006-11-14 JP JP2006009291U patent/JP3129273U/ja not_active Expired - Lifetime
Patent Citations (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS513758U (ja) * | 1974-06-24 | 1976-01-12 | ||
JPS56102822U (ja) * | 1980-01-10 | 1981-08-12 | ||
JPH044519U (ja) * | 1990-04-27 | 1992-01-16 | ||
JPH04282012A (ja) * | 1990-11-12 | 1992-10-07 | Man B & W Diesel As | 内燃機関用クランク軸 |
JPH058023U (ja) * | 1991-07-11 | 1993-02-02 | 克義 建内 | クランクシヤフト |
JPH05215123A (ja) * | 1992-02-06 | 1993-08-24 | Honda Motor Co Ltd | クランクシャフトの製造方法 |
JPH06200919A (ja) * | 1992-11-06 | 1994-07-19 | Audi Ag | 内燃機関の組立式クランク軸の製造方法およびそのクランク軸 |
JPH07259838A (ja) * | 1994-03-16 | 1995-10-09 | Mitsubishi Materials Corp | クランクシャフトの製造方法 |
JP2000283141A (ja) * | 1999-03-29 | 2000-10-13 | Honda Motor Co Ltd | 2サイクル多気筒エンジン用クランクシャフト |
JP2003254319A (ja) * | 2002-03-05 | 2003-09-10 | Suzuki Motor Corp | エンジンのクランク軸構造 |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2011163499A (ja) * | 2010-02-12 | 2011-08-25 | Kondo Kosakusho Co Ltd | 自動車エンジン用の組立式クランクシャフトおよび組立方法 |
Also Published As
Publication number | Publication date |
---|---|
JPWO2005090801A1 (ja) | 2008-05-08 |
JP3129273U (ja) | 2007-02-15 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP3133309U (ja) | 自動車エンジン用のクランクシャフト | |
US10302122B2 (en) | Balance shaft | |
JP5397957B2 (ja) | クランクシャフトの製造方法及びその製法によって製造されたクランクシャフト | |
JPH0354021B2 (ja) | ||
JP3129273U (ja) | 自動車エンジン用のクランクシャフト | |
JP2000079801A (ja) | 軽金属合金製自動車用ホイールの製造方法 | |
EP1020242B1 (en) | Engine crankshaft made by forging | |
JPH07259838A (ja) | クランクシャフトの製造方法 | |
JPH01289517A (ja) | 内燃機関の組立形クランク軸の製造方法および組立形クランク軸 | |
US5342243A (en) | Universal joint yoke | |
JP2006507452A (ja) | 粉末金属接続ロッド | |
JP2008175390A (ja) | クランクシャフト | |
JP3138083U (ja) | 自動車エンジン用のクランクシャフト | |
US20160208901A1 (en) | Complex Cast Component and Casting Method Therefor | |
KR20080067528A (ko) | 외주면이 이종 강재로 된 구상화 흑연 주철 및 주철 크랭크사프트 | |
JPH02180308A (ja) | 内燃機関用鋳造クランクシャフト | |
JP5169301B2 (ja) | クランクシャフトおよびその製造方法 | |
JP2012141044A (ja) | クランク軸支持構造 | |
JPH0577026A (ja) | 複合カムシヤフト及びその製造方法 | |
US20180172064A1 (en) | Method for manufacturing crankshaft, and crankshaft | |
JPH058023U (ja) | クランクシヤフト | |
JP2006051507A (ja) | 自動車用ナックルおよびその製造方法 | |
JPS58215237A (ja) | クランクシヤフトの製造方法 | |
JP5289137B2 (ja) | 組立クランクシャフトおよびその製造方法 | |
FR2943392A1 (fr) | Vilebrequin pour moteur a combustion interne |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AK | Designated states |
Kind code of ref document: A1 Designated state(s): AE AG AL AM AT AU AZ BA BB BG BR BW BY BZ CA CH CN CO CR CU CZ DE DK DM DZ EC EE EG ES FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MA MD MG MK MN MW MX MZ NA NI NO NZ OM PG PH PL PT RO RU SC SD SE SG SK SL SY TJ TM TN TR TT TZ UA UG US UZ VC VN YU ZA ZM ZW |
|
AL | Designated countries for regional patents |
Kind code of ref document: A1 Designated state(s): GM KE LS MW MZ NA SD SL SZ TZ UG ZM ZW AM AZ BY KG KZ MD RU TJ TM AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LU MC NL PL PT RO SE SI SK TR BF BJ CF CG CI CM GA GN GQ GW ML MR NE SN TD TG |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application | ||
DPEN | Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed from 20040101) | ||
WWE | Wipo information: entry into national phase |
Ref document number: 2006511117 Country of ref document: JP |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
WWW | Wipo information: withdrawn in national office |
Country of ref document: DE |
|
122 | Ep: pct application non-entry in european phase |