JPS5865954A - Assembling method of ceramic engine - Google Patents

Abstract

PURPOSE:To disperse local stress for preventing the occurrence of cracks or the like by inserting a metal bolt and a special metal nut into a hole provided in a ceramic part and threading said bolt into said nut to fasten fixedly and indirectly the ceramic part. CONSTITUTION:Crank cases 6a, 6b sandwiching a crankshaft 7a on its both ends are coupled with metal bolts 12b inserted into five through holes 18 provided in the case 6a and threaded into special metal nuts 11c which are inserted into holes 17b perpendicular to the through hole 18 provided in the case 6b and provided with a female screw 11n perpendicular to the axis of the nut. Further, fastening metal screws 13 are threaded into female screws 11n in special nuts 11b inserted into holes 16 provided in the crankcases 6a, 6b, and inserted into a cylinder 3 and a cylinder head 2 so that the upper ends of the fastening screws 13 are fastened by hexagonal nuts 14 on the upper surface of the cylinder head 3 to couple these three parts with each other.

Description

[Detailed description of the invention] The present invention relates to a method for assembling a ceramic engine.

More specifically, we have adopted an indirect tightening method that avoids direct tightening to ceramic parts.

It alleviates the stress applied locally on ceramic parts to prevent cracking and chipping, and also reduces t1° caused by rotation and vibration.
The present invention relates to a method for assembling a ceramic engine that prevents loosening of the η training center and also facilitates the manufacturing process of ceramic parts.

The 41 points of using ceramic engine parts is to improve fuel consumption efficiency through high-temperature combustion, which is difficult to achieve with metals.

It is possible to create an engine that does not require a cooling device, eliminates the need for a 116-valent heat-resistant alloy, has excellent wear resistance, and is lightweight. In particular, the fuel consumption efficiency of gas turbines is said to be improved by about 3096 points compared to reciprocating engines. However, there are many problems in practical application, such as reliability of quality of ceramic materials and parts, expensive technology, processing, etc.
There are 11 vertical bonding technologies, inspections, life prediction methods, costs, etc., and the current situation is that each research ♂1 is making efforts to investigate and solve these problems.

Among the above problems, the present invention relates to assembly and joining technology, and its gist is based on the contents described in the claims.According to the assembly method of the present invention, gold: I! In order to indirectly tighten the ceramic parts by inserting a metal bolt and a special metal nut into the installation hole of the ceramic part and screwing the metal parts together, the localized force applied to the ceramic part is tightened. Since the compressive force is small and the stress is dispersed throughout the entire part, it has a great effect on preventing chips and cracks from occurring. In addition, since the special metal nut shaft is screwed at right angles to the metal bolt shaft, it is difficult for the bolt shaft and nut shaft to rotate due to rotation and vibration during engine operation. No loosening occurred, and no problems occurred even during long-term operation.

In addition, this method is more compact and takes up less space than conventional flanges.
This method is suitable for assembling parts that can be accessed in narrow spaces.

The following is an assembled side sectional view of FIG. 1 and an exploded perspective view of FIG. 2, which are embodiments of the present invention. Explain in order in conjunction.

The method for assembling each part made of ceramic is to assemble the piston 4 and connecting rod 5 shown in Figure 1.

This is assembled and connected as an integral part of the crank bin 7b and the crankshaft 7a, and is inserted between the divided crankcases 6a and 6b shown in FIG. Insert a metal hexagonal pole 12b with a diameter of 5.0 on the shaft side surface. Five perfect circular holes 18 of Ontm are provided near the five corners to penetrate toward the opposing surface, and the through holes are extended to an intermediate position inside the crankcase 6b. 18, the female screw hole 11') shown in the enlarged view indicated by the arrow in FIG. A special metal nut 1 with a diameter of 9.5 mm installed perpendicularly to the nut axis.
Five perfect circular holes 17b with a diameter of 10 mm are provided at right angles to insert 1C, and a special oak (IIC) is inserted into these holes 17b.
Metal hexagonal bolt 12 with a washer fitted into the hole 18 described above
b was inserted, and its tip end was screwed into the female hole 1171 of the special nut 11C, and each of the five nuts was tightened to connect and fix the crankcases 6a and 6b.

Next, 7 cylinder head 2 and the outer periphery of cylinder 3 and 6
The cylinder head 2 and the cylinder 3 have a diameter of 5.5 mm, which has grooves at both ends, at the same position where they connect to each other near the four corners of the upper surface of the crankcase where the cylinder heads 2 and 6 b are joined. Otr
Insert the rm metal tightening bolt 13 into each 4 hole diameter 6, Omtn perfect circular hole 1.
5 and crankcases 5a and 6b; part bolt 1
Four perfect round holes 15a with a diameter of 6.0 mm are provided, and a female thread hole 11w, shown in the enlarged view indicated by the arrow in the figure 'M2, is provided perpendicularly to the nut axis. diameter 9
．． Special metal oak with 5 throats) 11. Four perfect circular holes 16 with a diameter of about 10 b are inserted from the side walls of the crankcases 6a and 6b at right angles to the tip of the hole 15a, and special holes (Ilb) are inserted into the holes 16. The threaded ends of the tightening bolts 13 inserted into the holes 15a are screwed into the holes 11/1t to fix the four tightening bolts 13 in each of the cylinders 3 and cylinder heads 2. Insert into the installation circular hole 15, screw the metal hexagonal nuts 14 fitted with washers and spring washers onto the tips of the tightening bolts 13 protruding from the cylinder head 2, and tighten the four bolts to fix them. do.

Next, attach a metal carburetor C (not shown) and a metal exhaust manifold E (not shown) to opposing positions on the outer surface of the cylinder 3.A metal hexagonal pole (5.0 rrun in diameter) 12a has an insertion pin (6.0 rrun in diameter). Two circular holes 18a are provided in each cylinder 3 up to an intermediate position inside the cylinder 3, and an enlarged N female threaded hole 115 with a diameter of 9.5 mm is provided perpendicularly to the nut axis as shown by the arrow in FIG. Metal special nut 1
The hole 17 with a diameter of 10 mm into which the hole 1a is inserted is inserted into the hole 18a.
Provided perpendicularly from the side wall of the cylinder 3 toward the tip hole of the hole 17, and insert a special nut lla into the hole 17,
Hexagonal pole l- with a washer fitted into the hole 18a] 2 a
, and tighten the tip by screwing the threaded part into the narrow hole IE7L of the special nut lla.

Next, a metal IJ flywheel 8 and an ETP bushing 9 were used to connect the shaft on the power side and the shaft on the bearing side J to the crankshaft 7a. This ETP bushing is a commercially available product, and when the bolt is attached to it, the pressure of the plastic filled inside increases, expanding the inner and outer diameters and fixing the inside and outside of the bushing.
l(: It is a hand.

In the above embodiment, a method for assembling a single cylinder engine has been described, but this method can also be applied as is to assembling other cylinder engines.

The ceramic engine assembled using the above method.

In actual machine tests, the machine has continued to operate in good condition, with smooth rotation, no loosening of fastened parts, and hardly any chipping or cracking of ceramic parts during long-term continuous operation.

[Brief explanation of the drawing]

FIG. 1 is a side sectional view of an assembled internal combustion engine according to the present invention. FIG. 2 is an exploded oblique view. 1...Spark plug, 2...Cylinder head, 3.
...Cylinder, 4...Piston, 5...Connecting rod,
6a. 6b...Crankcase, 7a...Crankshaft. 7b...crank pin, end...flywheel, 9...E
TP cup 9 yu, 10-cup') ng-11a, ll
b. 11C...Special nut, 117L...0-hole, 1
2a. 12b...Hexagonal bolt, 13...Tightening bolt with both ends threaded, 14...Hexagonal nut, C...Carburetor mounting position l E...Exhaust manifold mounting position. J... Bearing side, D... Power side 9-

Claims (1)

[Claims] 1. Cylinder head, cylinder, crankcase, piston, and connection m made of ceramic. In the method of assembling each part such as the crankshaft. The crankshaft 7a with the L-marked piston 4 and the connecting shaft 5 is inserted into the divided crankcases 6a and 6b, and the hole for inserting the metal (metal) and four-piece (pole) 12b is inserted from the side of the crankcase 6a. 18 are provided in five holes near the five corners, and the through holes are extended to the intermediate position of the self-travel 11 of the crankcase 6b, and from the ground side of the crankcase 6b toward the tip hole of the hole 18, Menedi hole 117L
A hole 17b for inserting a special nut (special nut) IIC is provided perpendicularly to the nut axis, and a special nut (special nut) IIC is inserted into the hole 17b, and a metal hole (18) is inserted into the other hole 18. The threaded end of the nut 12b is screwed into the female threaded hole 111rL of the special nut 11C to securely fix the five nuts. l) At the same level 18 of the surfaces that connect with each other near the four corners of the cylinder head 2 and 7 cylinder 3, both ? The metal tightening bolt 13 that supports the thread on the lij is attached to 1f1 (each of the four holes 15 through which the lij is inserted, and the crankcases 5a and 51). 4 holes to insert up to 1
5a, and a hole 16 for inserting a special metal nut 111) having a diagonal hole 11'71 perpendicular to the nut axis.
41. from the side wall of the crankcase 6a, 61) at a right angle toward the tip of the hole 15a. (Special oak inserted in hole 11 and inserted into hole 16) Hole 15 is inserted into female thread hole 11'71 of Ilb.
Screw the tip of the horizontal bolt 13 inserted into a,
Fix each of the first four bolts, insert the tightening bolts 13 into each installation hole 15 of the cylinder 3 and cylinder head 2, and attach a metal thread to the tip end of the tightening bolt 13 that protrudes from the cylinder head 2. 11" Screw together the wool hexagonal nut 14
Tighten and fix the book, and also insert holes for metal bolts 12a to attach carburetor C and exhaust manifold E to opposite positions on the outer surface of cylinder 3] 8a each 2'
The hole 17 for inserting the gold 1.4-thickness special nut l-11a, which is provided up to the middle position inside the cylinder 3 by +f++ and has the female hole 11'7k perpendicular to the nut hole, is inserted into the hole 18a. A special nut 11a is inserted into the hole 17 at a right angle from the side wall of the cylinder 7 toward the tip hole.
This method of assembling a ceramic engine is characterized in that the tip end corner of a hexagonal bolt 12a inserted into a hole 18a of No. 12 is screwed into a female threaded hole 11'7t of a hole (not shown) and tightened. 2. Crank shirt according to claim 1) 7a
This is a patented method for assembling a ceramic engine in which an ETP bushing 9 is used to connect the metal flywheel 8 attached to it, the power shaft, and the bearing.