JPS5865937A - Reciprocating internal-combustion engine - Google Patents

Abstract

PURPOSE:To form an engine to light weight and small size, by converting reciprocating motion to rotary motion of a piston through a solid cam and providing the solid cam correlatively to the piston. CONSTITUTION:A solid cam 7 is constituted by a continuously shaped guide groove 6, formed to an internally peripheral suface in the lower part of a cylinder 2, and rollers 11, used as a driven unit, supported by a bearing to lowe end both peripheral sides of an extended cylinder part 10a, successively provided in the lower of a skirt part of a piston 10, and engaged to said guide groove 6. While a distance between a crest part 6a and root part 6b of the wave-shaped guide groove 6 is provided with height equal to a stroke of the piston 10, then the crest part 6a and the root part 6b of the guide groove 6 are provided in each two places in a condition circumferentially shifted with 90 deg.. Accordingly, the necessity for using a balancer and crank weight or the like can be eliminated, and an engine can be formed to light weight and small size.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to two-cycle and four-cycle reciprocating internal combustion engines such as gasoline and diesel engines used to power automobiles, ships, airplanes, and the like.

Conventionally, in reciprocating internal combustion engines, the reciprocating motion of the piston is converted into rotational M motion by a crank connected to the piston via a connecting rod. By installing a balancer on the crankshaft or attaching a balancer to prevent lateral vibration due to centrifugal force of the crankshaft or crank weight, the overall size of the engine increases, weight increases, and energy is consumed. There is a problem that it is wasted, and there is also a problem that the rotational movement by the crank mechanism causes uneven wear of the screws and cylinders.

The present invention converts the reciprocating motion of the piston into rotary motion without using a crank, and with the addition of a balancer, it is possible to obtain smooth rotation and less vibration. The purpose is to provide an internal combustion engine.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a four-stroke gasoline type single-cylinder reciprocating internal combustion engine shown in FIGS. 1 and 2 will be described in detail as an example.

Reference numeral 1 denotes a cylinder block provided with a cylinder 2, and a cylinder head 5 provided with supply and exhaust valves 4 and 4a that alternately open and close supply and exhaust holes 6 and 3a is attached to the upper end of the cylinder block 1.

Reference numeral 6 denotes a guide groove as a driving body of a three-dimensional cam 7, which will be described later, and the guide groove 6 is formed in a continuous wave shape on the inner circumferential surface of the lower part of the cylinder 2.

8 is a head cover that covers the upper end of the cylinder head 5, and 9 is an oil pan attached to the lower end of the cylinder block 1.

Reference numeral 10 denotes a piston fitted into the cylinder 2 so as to reciprocate while rotating spirally. rollers 11.11 are pivoted so that they can roll in the guide groove 6 opposite each other. Reference numeral 12 denotes a piston rod of the piston 10, which is provided with a key 12a at its lower end. This is a piston ring that is fitted onto the head of a 13-piece piston 10 that has been cut.

Next, the three-dimensional cam 7 will be explained. The three-dimensional cam 7 is a continuous guide formed on the inner peripheral surface of the lower part of the cylinder 2. #6 and Noborigo part 101 that continues below the skirt of piston 10
The lobe 11.11 is a driven body that is pivotally supported on both sides of the outer circumference of the lower end of the lobe 11 and engaged with the guide groove 6. The distance between the ridges 6a and troughs 6b of the wave-shaped guide groove 6 is equal to the height of 100 strokes of the piston, and the ridges 6a and troughs 6b of the guide groove 6 extend in the circumferential direction. 9
It is set at 2@ locations with a 0 degree shift. Therefore piston 1
0 moves up and down with the mountain part 6ak as the top dead center and the top part 6b as the bottom dead center, and rotates once for every two reciprocations. The piston ring 16 described above is formed so as to be located above the peak 6a even when the piston 10 descends at bottom dead center.

Reference numeral 14 denotes a spur gear whose boss portion is provided with a piston rod insertion hole 15 through which the piston rod 12 is movably inserted into the H lower tank. Keyway 14 that engages with 12a
FL is formed, and the spur gear 14 has a bearing 16
It is pivotally supported by the cylinder block 1 via.

17 is a spur gear of the output shaft 18 that meshes with the spur gear 14, and 19 is a bearing that pivotally supports the spur gear 17. Further, a flywheel (not shown) is attached to the output shaft 18.

20 is a water jacket 1 for cooling provided in the cylinder block 1. De Al.

With this structure, when the mixed gas supplied into the cylinder 2 is compressed and then exploded, the piston 10 at the dead center moves to the roller 11, as shown in FIG.
11, spirally rotates along the guide groove B, and descends from the woman. Therefore, the rollers 11°11 move to the indoor groove 60 trough 6b.
That is, the piston 1G rotates 90 degrees while reaching the bottom dead center, and the spur gear 14.17 and the output shaft 18 rotate accordingly.

Therefore, the flywheel attached to the output shaft 18 rotates, and its inertia further rotates the spur gear 14 to rotate the piston 10. Therefore, the roller 1 of the piston 10
1 and 11 are spirally rotated from 1 to 1 to JJTL from the trough 6b to the ridge 6a of the guide groove 6, and the combustion gas in the toxi cylinder 2 is discharged from the exhaust hole 6a. Then, when the piston 10 rotates 90 degrees and reaches the top dead center and the ejection ceremony ends, the piston 10 begins to descend again while spirally rotating along the guide groove B. At this time, a mixed gas is supplied from the condensing hole 6. When the piston 10 rotates 90 degrees and reaches the bottom dead center and air supply ends, the piston 10 moves along the guide groove B to 11f.
When the piston 10 rotates 90 degrees and reaches the top dead center, the mixed gas in the cylinder 2 is ignited and explodes, and the piston 10 operates in the same manner as described above. The output shaft 18 is rotated by repeating the above steps.

Note that the number of lobes 11 pivotally supported by the extension sheath IC1a of the piston 10 is not limited to two, and may be one or four.
a and the valley portion 6b must be provided at an interval of 45 degrees.

Next, a four-cycle gasoline type four-cylinder reciprocating internal combustion engine shown in FIGS. 6 and 4 will be described in detail as an example. Hereinafter, for convenience of explanation, the same reference numeral f as the member in the above embodiment will be given to a member equivalent to the member in the above embodiment.

1 is number 1 from the left side of Figure 6. Second. 6th. 5 is a cylinder block provided with each cylinder 2; 5 is a cylinder head attached to the -E end of the cylinder block 1;
The cylinder head 5 has each air supply/exhaust hole 3.3ae provided for each cylinder 2, and an air supply/exhaust valve 4.4a which opens and closes alternately.
is provided.

Reference numeral 6 denotes a continuous wave-shaped guide groove as a driving force of the three-dimensional cam 7, and is formed on the inner circumferential surface of a cylindrical body 21a of a vehicle 21, which will be described later.

8 is a head cover that covers the top end of the cylinder head 5, and 9 is an oil pan attached to the lower end of the cylinder block 1.

Reference numeral 10 denotes a piston that is fitted into each cylinder 2 so as to be able to reciprocate. On both sides of the outer circumference of the lower end of the skirt portion of the piston 10, as shown in FIG. Two engraved keys? A locking key 10b that engages with fIt2a is provided, and the screw l-
The opening 10 is configured to slide downward.

What? In FIG. 5, the piston 10 in the first cylinder has completed the second compression stroke and is at the upper point, the second cylinder has completed the suction stroke and is at the bottom dead center, and the sixth cylinder is at the bottom dead center. After completing the process, it is at the bottom dead center, and the fourth cylinder is moving again. Reference numeral 12 designates a piston rod of the piston 10, and rollers 11 and 11 as driven bodies of the three-dimensional cam 7 are supported on both sides of the lower end of the piston rod so that they can roll in the guide groove 6 facing each other. ing. A piston ring 16 is fitted onto the head of the piston 100.

Now, reference numeral 21 denotes a downward bevel gear rotatably supported by the cylinder block 1 via a bearing 19, and the upper surface of the boss portion thereof has a piston rod insertion hole into which the piston rod 12 is vertically slidably inserted. A cylindrical body 21 & having a cylindrical body 15 on its axis is provided upright, and a wave-shaped cylinder body 21& is provided on the inner peripheral surface of the insertion hole 15 as a driving body of a three-dimensional cam 7 that engages the rollers 11, 11 of the piston rod 12. A continuous guide groove 6 is formed.

Reference numeral 7 denotes a three-dimensional cam, which consists of a guide flIt6 formed on the inner surface of the piston rod insertion hole 15 of the cylindrical body 211, and rollers 11.11 engaged with the guide groove 6. Further, the distance between the ridges 6a and troughs 6b of the wave-shaped guide groove 6 is set to the same height as the screw roller of the screw I-10, and the ridges 6a and troughs 6b of the guide groove 6 90 in the direction
The bevel gears 21 are provided at two locking points at different degrees, so that when the piston 10 moves up and down twice, the bevel gear 21 rotates once.

Reference numeral 22 indicates four bevel gears of the output shaft 18 that mesh with the four bevel gears 21 .

26 is a flywheel attached to one end of the output shaft 18.

20 is a cooling water jacket provided in the cylinder block 1.

Next, the operation and effect of this embodiment will be explained for the first cylinder. When the mixed gas that has completed the compression process is ignited and exploded, the piston 10 is guided by the key 10b shown in FIG. 4 and descends vertically. However, the bevel gear 21 is rotated by the three-dimensional cam 7 attached to the lower end of the piston rod 12, and the bevel gear 22 degree flywheel 26 is rotated, and due to its inertia, the piston 10 dies under the trough 6bk of the guide tl/16. It turns around and ascends to perform the exhaust process, then descends with the peak 6a as the top dead center to perform the suction process, and further rises to enter the compression process. During this period, the piston moves up and down twice, and the bevel gear 21 rotates once, completing one cycle.

The same cycle as in the first cylinder described above is performed in the second to fourth cylinders, and the rotational driving force generated in each cylinder is extracted from the output shaft 18.

That is, in the reciprocating internal combustion engine according to the present invention, a three-dimensional cam that converts the reciprocating motion of the piston into rotational motion is provided in conjunction with the piston, so it is similar to an engine that converts the reciprocating motion of the piston into rotational motion using a crankshaft. Since there is a lot of lateral vibration and little vertical vibration, there is no need to use a crank weight or balancer, and there is no uneven wear on the piston or cylinder, which increases Iv characteristics. In addition, since it does not use a balancer or crank weight, the entire engine can be made lighter and smaller, and it is inexpensive.
Moreover, it has the effect of reducing fuel consumption.

Therefore, the present invention eliminates the problems and drawbacks of conventional reciprocating internal combustion engines, is easy to manufacture, and is extremely useful as a reciprocating internal combustion engine suitable for energy saving.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and the 1st M is a 4-stroke gasoline type single-cylinder housing 7V type f! ! X#1! Fig. 2 is a partially cutaway front view of a cylinder with a guide groove formed in it, and Figure 6 is a partially cutaway side view of a 4-stroke gasoline-type 4-cylinder reciprocating internal combustion engine. FIG. 4 is a partially cutaway bottom view of FIG. 5. 2... Cylinder 7... Three-dimensional cam 10...
・Piston applicant: Sugiura
Takuyo Rihito Patent Attorney Oka Ell Hidehiko 3rd
Figure 8 Foil 4 View 89 201-

Claims (1)

[Claims] 1. A reciprocating internal combustion engine, characterized in that a piston is fitted into a cylinder so as to be capable of reciprocating motion, and a three-dimensional cam for converting the reciprocating motion of the piston into rotational motion is provided in association with the piston.