US3786796A - Method and apparatus for taking out piston in trunk piston engine - Google Patents
Method and apparatus for taking out piston in trunk piston engine Download PDFInfo
- Publication number
- US3786796A US3786796A US00243128A US3786796DA US3786796A US 3786796 A US3786796 A US 3786796A US 00243128 A US00243128 A US 00243128A US 3786796D A US3786796D A US 3786796DA US 3786796 A US3786796 A US 3786796A
- Authority
- US
- United States
- Prior art keywords
- piston
- cylinder
- axis
- connecting rod
- 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.)
- Expired - Lifetime
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
- F02F7/00—Casings, e.g. crankcases or frames
- F02F7/0043—Arrangements of mechanical drive elements
- F02F7/0046—Shape of casings adapted to facilitate fitting or dismantling of engine parts
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
- F02F7/00—Casings, e.g. crankcases or frames
- F02F7/006—Camshaft or pushrod housings
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S123/00—Internal-combustion engines
- Y10S123/06—Detachable
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49229—Prime mover or fluid pump making
- Y10T29/49249—Piston making
- Y10T29/4925—Repairing, converting, servicing or salvaging
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49815—Disassembling
- Y10T29/49822—Disassembling by applying force
Definitions
- This invention relates to a method and apparatus for taking out piston in trunk piston engine.
- the piston is taken from the engine by removing a cylinder head cover and then upwardly drawing a piston.
- removing work of the cylinder head cover such associated works as separation of the cylinder head piping, separation of valve actuating mechanisms and releasing of cylinder head cover fastening bolts are necessary, which requires much labor.
- an object of the present invention is to overcome the above conventional drawbacks by the provision of a method, which enables taking the piston to the outside of the engine with a minimum of necessary works.
- the connecting rod is disconnected from the piston, the connecting rod is turned to a suitable position within the crankcase, the piston is taken out of the cylinder into the crankcase and supported on the crankshaft, thereafter the crankshaft is rotated, so that the piston is moved to the opening of the crankcase, where the piston can be readily taken from the engine.
- FIGS. I to 4 illustrate a method of taking the piston according to the present invention applied to a V-type engine
- FIG. 5 is a section taken on line A-A in FIG. 3;
- FIG. 6 to 9 show also the method according to the present invention applied to a straight type engine.
- FIG. is a section taken on line B-B in FIG. 8.
- connecting rod 3 consists of two parts 3a and 3b removably connected at 5 by bolts 6.
- Crankshaft 7 carries a balance weight 8 secured to it, the balance weight is formed with a recess 9, into which the piston 2 can be inserted.
- the crankshaft is turned to bring the piston to be taken to the bottom dead point thereof, as shown in FIG. I. Thereafter, by releasing the bolts 6 the upper and lower halves 3a and 3b of the connecting rod are separated from each other.
- the lower connecting rod half 3b is turned to a a suitable position within the crankcase by turning the crankshaft or by rotating it about the crankpin without separating it from the crankshaft as shown in FIG. 2.
- the crankshaft is again rotated to the bottom dead point to bring the weight 8 into a position directly beneath the piston leaving the connecting rod in the position, as shown in FIG. 3. Thereafter, the piston 2 is drawn downwardly from the cylinder and inserted into the recess 9 of the balance weight 8 (FIG.
- crankshaft is rotated with the piston held in the recess to bring the piston to a position in front of the oil door.
- the piston can be taken out in the direction of arrow.
- a suitable member may be attached to the crankshaft for the same operation as mentioned above.
- FIGS. 6 to 10 show another embodiment of the present invention applied to a straight type engine.
- the same parts as those in the preceding embodiment are designated by same reference numerals as those used in the preceding drawings.
- the taking and assembling of the piston can be done in the same way as in the preceding embodiment.
- the piston which is assembled in the engine can be taken out with a minimum of work without removing the cylinder head cover, so that the time and labor required for the inspection and maintenance may be greatly decreased.
- a trunk piston engine having a crankshaft rotatable about an axis of revolution, a crank on said shaft offset to one side of said axis of revolution, and a balance weight offset to the opposite side of said axis of revolution
- a cylinder in said engine having its axis disposed radial to said axis of revolution
- a piston mounted for axial displacement in said cylinder and a connecting rod having means at one end rotatably mounting said rod on said crank and means at the other end rotatably mounting said rod on said piston, whereby rotation of said crankshaft on its axis of rotation reciprocates said piston in said cylinder
- the method of removing the piston comprising the steps of disconnecting the connecting rod from the piston at said other end of the rod, rotating said connecting rod away from said cylinder and providing a support for the disconnected end of said rod, positioning said balance weight in confronting relation to said cylinder, drawing the piston toward said axis of rotation a distance sufficient to disengage said piston from said cylinder and to engage said piston with said balance
- balance weight of said engine consists of a bifurcated member having a radial recess therein for receiving said piston, including the step of telescopically engaging said piston in said recess during removal of said piston from said cylinder.
- a method according to claim 1 including the step of providing a releasable connection between said connecting rod and said mounting means for said piston at a point between the inner end of the cylinder and the axis or rotation of thecrankshaft when said crank is positioned furtherest away from said cylinder whereby upon disconnection of said connecting rod from said piston, the free end of said connecting rod clears the inner end of said cylinder.
- a trunk piston engine having a crankshaft rotatable about an axis of revolution, a crank on said shaft offset to one side of said axis of revolution, a bifurcated balance weight offset to the opposite side of said axis of revolution in transverse alignment with said crank, a connecting rod having means at one end rotatably mounting said rod on said crank and operable to rotate in a plane perpendicular to said axis of revolution between the bifurcations of said balance weight, a cylindeer in said engine having its axis disposed radial to said axis of revolution within said plane, a piston mounted for axial displacement in said cylinder, means rotatably mounting the other end of said rod on said piston, whereby rotation of said crankshaft on its axis of rotation reciprocates said piston in said cylinder, said rod having a releasable connection between said connecting rod and said mounting means for said piston at a point between the inner end of said cylinder and the axis of rotation of the crankshaft when the crank is
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP46036822A JPS5012044B1 (da) | 1971-05-27 | 1971-05-27 |
Publications (1)
Publication Number | Publication Date |
---|---|
US3786796A true US3786796A (en) | 1974-01-22 |
Family
ID=12480433
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US00243128A Expired - Lifetime US3786796A (en) | 1971-05-27 | 1972-04-12 | Method and apparatus for taking out piston in trunk piston engine |
Country Status (9)
Country | Link |
---|---|
US (1) | US3786796A (da) |
JP (1) | JPS5012044B1 (da) |
CH (1) | CH538600A (da) |
DE (1) | DE2220261A1 (da) |
DK (1) | DK138405B (da) |
FR (1) | FR2138667B1 (da) |
GB (1) | GB1393987A (da) |
IT (1) | IT953731B (da) |
SE (1) | SE386968B (da) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4027365A (en) * | 1974-08-26 | 1977-06-07 | Societe D'etudes De Machines Thermiques | Method for removing and re-installing the crank-shaft of an internal combustion engine and device for carrying out the said method |
US4530141A (en) * | 1983-05-02 | 1985-07-23 | Caterpillar Tractor Co. | Unitary removal of engine cylinder liner, piston and rod |
WO1989007710A1 (en) * | 1988-02-09 | 1989-08-24 | Mtu Motoren- Und Turbinen-Union Friedrichshafen Gm | Reciprocating internal combustion engine with wet cylinder linings |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US592688A (en) * | 1897-10-26 | Engine | ||
DE512287C (de) * | 1925-10-26 | 1930-11-08 | Elizabeth Davol Strauss | Verbrennungskraftmaschine |
GB503261A (en) * | 1936-12-22 | 1939-04-04 | Werkspoor Nv | Improvements in and relating to high speed internal combustion engines |
FR960578A (da) * | 1950-04-20 |
-
1971
- 1971-05-27 JP JP46036822A patent/JPS5012044B1/ja active Pending
-
1972
- 1972-04-12 DK DK178172AA patent/DK138405B/da unknown
- 1972-04-12 US US00243128A patent/US3786796A/en not_active Expired - Lifetime
- 1972-04-14 GB GB1727372A patent/GB1393987A/en not_active Expired
- 1972-04-22 IT IT23454/72A patent/IT953731B/it active
- 1972-04-25 DE DE19722220261 patent/DE2220261A1/de active Pending
- 1972-05-02 SE SE7205765A patent/SE386968B/xx unknown
- 1972-05-04 FR FR727215893A patent/FR2138667B1/fr not_active Expired
- 1972-05-26 CH CH786472A patent/CH538600A/de not_active IP Right Cessation
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US592688A (en) * | 1897-10-26 | Engine | ||
FR960578A (da) * | 1950-04-20 | |||
DE512287C (de) * | 1925-10-26 | 1930-11-08 | Elizabeth Davol Strauss | Verbrennungskraftmaschine |
GB503261A (en) * | 1936-12-22 | 1939-04-04 | Werkspoor Nv | Improvements in and relating to high speed internal combustion engines |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4027365A (en) * | 1974-08-26 | 1977-06-07 | Societe D'etudes De Machines Thermiques | Method for removing and re-installing the crank-shaft of an internal combustion engine and device for carrying out the said method |
US4530141A (en) * | 1983-05-02 | 1985-07-23 | Caterpillar Tractor Co. | Unitary removal of engine cylinder liner, piston and rod |
WO1989007710A1 (en) * | 1988-02-09 | 1989-08-24 | Mtu Motoren- Und Turbinen-Union Friedrichshafen Gm | Reciprocating internal combustion engine with wet cylinder linings |
Also Published As
Publication number | Publication date |
---|---|
CH538600A (de) | 1973-06-30 |
SE386968B (sv) | 1976-08-23 |
FR2138667A1 (da) | 1973-01-05 |
DK138405C (da) | 1979-02-05 |
JPS5012044B1 (da) | 1975-05-08 |
IT953731B (it) | 1973-08-10 |
DK138405B (da) | 1978-08-28 |
DE2220261A1 (de) | 1972-11-30 |
FR2138667B1 (da) | 1973-07-13 |
GB1393987A (en) | 1975-05-14 |
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