JPH10317987A - Reciprocating engine and connecting rod used therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce loss accompanying energy extraction by providing a piston shaft connected to a piston arranged in a cylinder and a hydraulic motor to which reciprocating motion of the piston shaft is input, and converting reciprocating motion of the piston shaft to rotary motion through the hydraulic motor. SOLUTION: This reciprocating engine 10 is provided with cylinders 12a-12d in a cylinder block 11, and pistons 13a-13d are built in the respective cylinders. A hydraulic motor 14 is arranged on the end part in the lengthwise direction of the cylinder block 11, and reciprocating motion of the pistons 13a-13d is converted to rotary motion by this. Namely the pistons 13a-13d are connected together through a connecting rod 15, magnetism generating parts 21 are provided on three part positions at which an output shaft 19 enters a supporting part 20, and the output shaft is supported so as to reciprocate in the lengthwise direction. The other end of the output shaft 19 is connected to a hydraulic cylinder 23, and the hydraulic motor 14 is driven by oil pressure generated in the hydraulic cylinder 23.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reciprocating engine and a connecting rod used for the reciprocating engine, and more particularly to a connecting rod used for a reciprocating engine capable of preventing generation of side thrust between a piston and a cylinder. About.

[0002]

2. Description of the Related Art Generally, as shown in FIG. 6, a reciprocating engine 41 mounted on an automobile or the like ignites a piston 38 disposed in a cylinder 37 with vaporized fuel supplied into the cylinder 37 and explodes. The piston 38 is reciprocated by the energy generated when the crankshaft 40 is rotatably joined to the end 42 of the connecting rod 39 joined to the piston 38, and the power generated by this rotation is appropriately output. Is configured.

In such a reciprocating engine, when the piston 38 is pushed by the explosion pressure, the crankshaft 40 is rotated with the connecting rod 39 inclined at a predetermined angle. In the reciprocating engine installed,
Since the load from the vehicle body and the road surface is simultaneously applied to the crankshaft 40, the piston 38
It will also be pushed from the side.

In this case, when the piston 38 reciprocates up and down in the cylinder 37 in accordance with the rotation of the crankshaft 40, the piston 38 moves up and down while being pressed against the inner wall of the cylinder 37 by the connecting rod 39. Therefore, the force of pressing the piston 38 against the inner wall of the cylinder 37 by the connecting rod 39,
So-called side thrust occurs.

[0005]

Since the piston 38 moves up and down while being pressed against the inner wall of the cylinder 37 by such side thrust, the explosion energy in the cylinder 37 is generated between the piston 38 and the inner wall of the cylinder 37. However, there is a problem that the efficiency of converting the explosion energy of the fuel into the driving force is low.

In this case, past studies have revealed that the side thrust reduces about 60% of the explosion energy. When the loss of explosion energy is large as described above, the so-called fuel efficiency of the engine also decreases. Therefore, conventionally, it has been desired to reduce the side thrust generated by the connecting rod 39 due to the rotation of the crankshaft 40.

Therefore, a technical problem of the present invention is to prevent a side thrust generated between a piston disposed in a cylinder and an inner wall of a cylinder in a reciprocating engine, and to reduce a fuel generated in the cylinder. An object of the present invention is to provide a high-efficiency reciprocating engine that reduces losses caused by energy extraction caused by an explosion. It is another technical object of the present invention to provide a horizontally opposed reciprocating engine having a smaller energy extraction loss, in addition to the technical problem of the first aspect.

Further, in the inventions according to claims 4 to 6, in addition to the technical problems described in claims 1, 2, and 3, it is to provide reciprodin, which has a higher energy transmission efficiency. . In the invention described in claim 7,
Another object of the present invention is to provide a horizontally opposed four-cylinder engine having good output energy efficiency in addition to the technical problems described in claims 1, 2, 3, 4, 5 and 6.

Further, in the invention according to claim 8, in addition to the technical problems according to claims 1 to 7, there is provided a connecting rod applied to reciprodin which has a higher energy transmission efficiency. It is in.

[0010]

In order to solve such technical problems, according to the first aspect of the present invention, a cylinder 1 is provided.
A piston shaft 16 joined to a piston 13 disposed in the hydraulic motor 1 and a hydraulic motor 14 to which reciprocating motion of the piston shaft 16 is input.
4 converts the reciprocating motion of the piston shaft 16 into a rotary motion.

Therefore, according to the first aspect of the present invention,
The reciprocating motion of the piston shaft 16 is input to the hydraulic motor 14 as it is, and is converted into rotary motion in the hydraulic motor 14, and is not configured to convert reciprocating motion into rotary motion in the connecting rod as in the related art. , No side thrust between the piston 13 and the cylinder 12 is generated.

As a result, a loss associated with energy extraction caused by the explosion of fuel generated in the cylinder 12 is reduced, and a highly efficient reciprocating engine is provided. Claim 2
In the described invention, a piston shaft 16 that joins a plurality of pistons 13 arranged in a cylinder 12 provided to face each other in the axial direction, and a movement direction of the piston 13 provided on the piston shaft 16 An output shaft 19 that reciprocates along and outputs kinetic energy generated by the reciprocating motion of the piston 13; and a support portion 20 for the output shaft 19. The output shaft 19 is supported in a non-contact state. 2
0, the reciprocating motion of the output shaft 19 is input to the hydraulic motor 14, and the reciprocating motion of the output shaft 19 is converted by the hydraulic motor 14 into rotary motion.

Therefore, according to the second aspect of the present invention,
When the engine operates and the plurality of pistons 13 reciprocate, the piston shaft 16 also performs the same reciprocating motion as the pistons 13, so that the connecting rod piston crank as in the conventional reciprocating engine. The joint end with the shaft does not make a circular motion.

As a result, the conventional pressing operation of the connecting rod with the piston in the lateral direction at the joint portion with the piston is eliminated, and as a result, the so-called side thrust of the piston 13 in the cylinder 12 can be prevented. Therefore, in the invention according to claim 2, since so-called side thrust of the piston 13 in the cylinder 12 can be prevented, the explosion energy of the fuel generated in the cylinder 12 is not lost by the side thrust. Can be extracted.

According to the third aspect of the present invention, in addition to the technical means of the second aspect, the output shaft 19 is joined to a hydraulic cylinder 23 and a hydraulic pressure generated by the hydraulic cylinder 23 is provided. Is supplied to the hydraulic motor 14. Therefore, claim 3
In the described invention, the reciprocating motion transmitted to the output shaft 19 is transmitted to the oil in the hydraulic cylinder 23 as it is, and is transmitted to the hydraulic motor 14 via this oil to be converted into rotary motion.

As a result, according to the third aspect of the invention, the so-called side thrust of the piston 13 in the cylinder 12 can be prevented.
The explosion energy of the fuel generated in the fuel cell 2 can be extracted without being lost by the side thrust. Further, in the invention according to claim 4, in addition to the technical means of the invention according to claim 2 or 3, the output shaft 19 is provided with a magnetism generating portion 21 and the support portion is also provided with: A magnet generator 21 for generating the same magnetism as the magnet generator 21 is provided, and the output shaft 19 is supported between the support shaft 20 and the support unit 20 in a non-contact state by magnetic repulsion. It is characterized by.

Therefore, in the invention according to claim 4,
Since the output shaft 19 and the support portion 20 are magnetically repelled and are in a non-contact state, no frictional resistance is generated between the output shaft 19 and the support portion 20. As a result, according to the fourth aspect of the invention, the explosion energy generated in the cylinder 12 can be extracted to the output shaft 19 without reducing.

According to a fifth aspect of the present invention, the support portion is provided with a roller bearing 22, and the output shaft 19 is guided by the roller bearing 22. Therefore, in the invention described in claim 5, the output shaft 1
9 is guided not only by magnetic repulsion by the support portion 20 but also by a roller bearing 22.

As a result, the output shaft 19 may physically contact the roller bearing 22 depending on the state of the reciprocating motion. Even in this case, a line contact state occurs, so that the contact resistance is extremely small, and the energy transmitted to the output shaft 19 is not lost. On the other hand, it is more stably supported by being guided by the roller bearing 22.

The invention according to claim 6 is characterized in that the magnetism generating section 21 is provided with a permanent magnet. Therefore, in the invention according to claim 6, a repulsive force is formed by the output shaft 19 and the permanent magnets disposed on the support portion 20. As a result, in the invention according to claim 6, the output shaft 1 can be used without reducing the explosion energy generated in the cylinder 12.
9 can be extracted.

According to a seventh aspect of the present invention, the reciprocating engine is a horizontally opposed four-cylinder engine 10, and two piston shafts 16, 16 for joining a pair of pistons 13, 13 to each other. And a joint shaft 17 for joining these piston shafts 16, 16 at a right angle to the reciprocating direction of the pistons 13, and an output shaft 19 provided on the joint shaft 17.
The connecting shaft 1 having an H shape is formed by the piston shafts 16, 16 and the joint shaft 17.
5 is formed.

Therefore, in the invention according to claim 7,
In the four-cylinder horizontally opposed engine 10, the piston 1
3 reciprocates within the cylinder 12 without generating side thrust. As a result, in the invention according to claim 7, in the four-cylinder horizontally opposed engine 10, the explosion energy of the fuel generated in the cylinder 12 can be extracted without being lost by the side thrust.

In the invention according to claim 8, a connecting rod 15 for joining a plurality of pistons 13 arranged in the cylinder 12, both ends of which are joined to the opposed pistons 13, 13, respectively. Piston shaft 1
6, an output shaft 19 provided on the piston shaft 16, reciprocating in the direction of movement of the piston 13, and outputting kinetic energy generated by the reciprocating movement of the piston 13, and a support portion 20 for the output shaft 19. The output shaft 19
Is characterized by being supported by the support portion 20 in a non-contact state.

Therefore, in the invention according to claim 8,
A connecting rod (15) for joining a plurality of pistons (13) arranged in a cylinder (12),
Has an output shaft 19 that reciprocates along the direction of movement and outputs kinetic energy generated by the reciprocating motion of the piston 13, and a support portion 20 for the output shaft 19. The output shaft 19 is a non-contact type. A connecting rod 15 supported by the support 20 in a state is provided.

As a result, in the invention according to claim 8, by using such a connecting rod 15, in the reciprocating engine 10, the explosion energy of the fuel generated in the cylinder 12 is converted by the side thrust. Extraction can be performed efficiently without loss.

[0026]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a reciprocating engine according to the present invention and a connecting rod used in the reciprocating engine will be described in detail based on an embodiment shown in the accompanying drawings. As shown in FIG. 1, a reciprocating engine 10 according to the present embodiment is formed as a horizontally opposed four-cylinder engine, and four cylinders 12a, 12b, and 12c arranged in a cylinder block 11 so as to face each other. ,
12d is provided. These four cylinders 1
Pistons 13a, 13b, 13c, and 13d are provided inside 2a, 12b, 12c, and 12d, respectively. The piston 13 is slidably disposed in the cylinder 12 along the axial direction of the cylinder 12. I have.

On the other hand, a hydraulic motor 14 is provided at the end of the cylinder block 11 in the longitudinal direction, and pistons 13a, 13b, 13 generated by explosive energy of vaporized fuel generated in the plurality of cylinders 12 are provided.
The reciprocating motion of c and 13d can be converted into a rotary motion and output. These four pistons 13
a, 13b, 13c and 13d are connected to each other by a connecting rod 15. The connecting rod 15 is formed in a substantially H-shape as a whole, and includes a plurality of pistons 13 arranged in cylinders 12a and 12c and cylinders 12b and 12d provided to face each other in the axial direction.
a, 13c and pistons 13b, 13d, a joint shaft 17 for joining these piston shafts 16, 16 at a substantially right angle to the reciprocating direction of the pistons 13, 13, and a joint shaft 17 for this. The output shaft 19 is provided in parallel with the piston shafts 16 and 16 and reciprocates along the movement direction of the pistons 13 and 13 to output kinetic energy generated by the reciprocation of the pistons 13 and 13.
And

The ends of the piston shafts 16, 16 are respectively connected to piston pins 18, 13 of the pistons 13, 13, respectively.
18, and are joined to each other by the joining shaft 17 at an intermediate portion in the longitudinal direction. The output shaft 19 is fixed in parallel to the piston shafts 16, 16 at an intermediate portion of the joint shaft 17, and one end of the output shaft 19 is supported by a support 20.

The support portion 20 is formed in a substantially rectangular parallelepiped cylindrical shape, and is configured such that one end of the output shaft 19 can advance and retreat therein. As shown in FIGS. 1, 2, 3, and 4, the portion of the output shaft 19 that enters the support portion 20 is
Magnetic generator 2 composed of strong permanent magnets
1, 21, 21 are provided.

On the other hand, as shown in FIGS. 3 and 4, above and below the support portion 20 and on both sides, the magnetic generation portion 2 built in the output shaft 19 is provided.
A plurality of permanent magnets 21 having the same magnetic poles as the permanent magnets constituting 1 are provided. Further, two roller bearings 22 are provided on the support portion 20 along the horizontal direction and the vertical direction, respectively.
Are provided slightly apart from the surface of the output shaft 19 to guide the output shaft 19 in the vertical and horizontal directions.

Therefore, as shown in FIG. 3 and FIG. 4, the output shaft 19 has one end inside the support portion 20 so that the output shaft 19 magnetically repels the inner wall of the support portion 20, and is physically separated. Since the output shaft 19 is supported in a non-contact floating state, one end of the output shaft 19 is configured to move back and forth in the length direction in the support portion 20 without contact resistance.

On the other hand, as shown in FIG. 2, the other end of the output shaft 19 is joined to a hydraulic cylinder 23. That is, at the end of the output shaft 19,
A piston 24 is provided and disposed inside the hydraulic cylinder 23. The hydraulic cylinder 23
Are connected by an oil supply path 25 and an oil return path 29.

Accordingly, the hydraulic pressure formed in the hydraulic cylinder 23 can be supplied to the hydraulic motor 14 through the oil supply passage 25, and the oil circulated in the hydraulic motor 14 is again supplied to the hydraulic return passage 29 by the oil return passage 29. It is configured to return to the inside of the cylinder 23. A one-way valve 32 is provided at a joint portion of the oil return path 29 with the hydraulic cylinder 23 to supply return oil from the oil return path 29 to the hydraulic cylinder 23. It is configured not to be discharged into the return path 29.

A one-way valve 33 is similarly provided on the piston 24 disposed in the hydraulic cylinder 23. When the piston 24 moves toward the hydraulic motor 14, the piston 24 is closed and the piston 24 is It is configured to be opened when moving in the direction of the motor 14. As shown in FIGS. 2 and 5, the hydraulic motor 14 has a rotor 26 provided in a gap in a housing 34 of the hydraulic motor 14 so as to be rotatable. Vanes 27 are provided. The hydraulic motor 14 has an oil supply hole 28 and an oil discharge hole 29 and an oil circulation path 31.

Accordingly, when oil of a predetermined pressure is supplied from the oil supply hole 28 into the hydraulic motor 14, the rotor 26 is rotated by the plurality of vanes 27, and is provided at the rotation center of the rotor 26. The rotation of the rotor 26 is output by the output shaft 30. Further, in the present embodiment, each of the cylinders 12a, 12
Plugs (not shown) are provided for b, 12c, and 12d, and the plugs of the first cylinder 12a and the second cylinder 12b are simultaneously ignited and the third cylinder 12c
And the plug of the fourth cylinder 12d is
a and the plug of the second cylinder 12b are simultaneously ignited with a time difference.

Although not shown, the reciprocating engine 10 according to the present embodiment includes the cylinders 12a, 1
An appropriate fuel supply device, such as a carburetor, for vaporizing and supplying fuel to 2b, 12c, and 12d is provided. Less than,
The operation of the reciprocating engine 10 according to the present embodiment will be described. When operating the horizontally opposed four-cylinder reciprocating engine 10 according to the present embodiment, an ignition switch (not shown) is turned on to energize the fuel supply device, and a fuel supply device such as a carburetor (not shown) is operated to supply mist fuel. Of each cylinder 12a, 12b, 12
By operating the plug by filling the cylinders 13c, 12d, vaporized fuel explodes in the cylinders 12a, 12b, 12c, 12d, and the pistons 13a, 13b, 13d are exploded.
Reciprocate c and 13d.

In this case, as described above, in the present embodiment, the first cylinder 12a and the second cylinder 12b
Are ignited simultaneously and the third cylinder 12
c and the plug of the fourth cylinder 12d are connected to the first cylinder 1
2a and the plug of the second cylinder 12b are simultaneously ignited with a time difference. As a result, first, the cylinders 12a, 1
When the vaporized fuel explodes in 2b, the connecting rod 15 moves toward the hydraulic motor 14 along the length direction due to the explosion energy. Next, when the vaporized fuel explodes in the cylinders 12c and 12d,
The connecting rod 15 moves toward the anti-hydraulic motor 14 along the length direction. Therefore, by repeating this, the connecting rod 15 reciprocates along the length direction.

In this case, since the other end of the output shaft 19 is joined to the piston 24 arranged in the hydraulic cylinder 23 as described above,
When a plug disposed in the first cylinder 12a and the second cylinder 12b is ignited and fuel explodes in the first cylinder 12a and the second cylinder 12b, a piston 24 disposed in the hydraulic cylinder 23 is used. The compressor compresses the oil filled in the hydraulic cylinder 23 to pressurize the oil to a predetermined pressure, and sends the oil at a predetermined pressure into the hydraulic motor 14 through the oil supply path 25.

In this case, as shown in FIG. 5, when oil of a predetermined pressure is supplied from the oil suction hole 28 of the hydraulic motor 14 into the hydraulic motor 14, as described above, In the above, the rotor 26 is rotated by the plurality of vanes 27, and the rotation of the rotor 26 is output by the output shaft 30 provided at the rotation center of the rotor 26.

In this case, the oil supplied to the hydraulic motor 14 with the movement of the pistons 13a and 13b is supplied to the one-way valve 32 by the oil return path 29.
To the upper end side 35 of the hydraulic cylinder 23 via. Then, the third cylinder 12c and the fourth cylinder 12
d is ignited and the third cylinder 12c
When the fuel explodes in the fourth cylinder 12d, the pistons 13c and 13d are pushed by the explosion pressure, and the connecting rod 15 returns toward the first cylinder 13c and the second cylinder 13d.

With this return operation, the oil moves to the lower end portion 36 of the piston 24 of the hydraulic cylinder 23 via a one-way valve 33 provided on the piston 24 in the hydraulic cylinder 23. Next, again, the first cylinder 12a
When the plug provided in the second cylinder 12b is ignited and fuel explodes in the first cylinder 12a and the second cylinder 12b, the pistons 13a, 13b
Is pushed by the pressure of the explosion and the connecting rod 15
Moves toward the third cylinder 13c and the fourth cylinder 13d.

By this movement, as described above, the piston 24
Pressurizes oil in the hydraulic cylinder 23, and the pressurized oil is supplied to the hydraulic motor 14 through an oil supply path 25, the rotor 26 rotates in the same manner as described above, and the rotational motion is Is output. By repeating such a process, the rotor 26 is connected to the output shaft 30.
Is output, and such a continuous rotation can be appropriately applied to various fields.

Reciprocating engine 10 according to the present embodiment
In this case, the energy transmitted in the form of the reciprocating motion of the connecting rod 15 is transmitted to the output shaft 19.
The hydraulic motor 14 connected to the hydraulic cylinder 23 converts the rotational motion into rotary motion. Within
It is not configured to convert the energy generated by the explosion of vaporized fuel from reciprocating motion to rotary motion in the connecting rod as in a general reciprocating engine, so side thrust is generated due to the vertical movement of the connecting rod. The energy loss caused by the explosion of the vaporized fuel is very small.

As a result, in the horizontally opposed four-cylinder reciprocating engine 10 according to the present embodiment, the energy transmission efficiency can be greatly improved as compared with the conventional reciprocating engine. Further, in the reciprocating engine 10 according to the present embodiment, as described above, the output shaft 19 has one end in the support portion 20.
The inner wall of the support portion 20 is magnetically repelled from each other, and is supported in a floating state that is physically non-contact. Therefore, one end of the output shaft 19 has a contact resistance in the support portion 20. It is configured to move back and forth in the lengthwise direction without it.

As a result, almost no sliding resistance is generated due to the reciprocating movement of the connecting rod 15, so that the fuel efficiency can be improved by about 20% as compared with the conventional reciprocating engine. The specific configuration of the horizontally opposed reciprocating engine 10 is not limited to the above embodiment. Further, the specific configuration of the hydraulic motor is not limited to the above embodiment.

Further, in the present embodiment, the case where the present invention is applied to a four-cylinder horizontally opposed reciprocating engine has been described as an example. However, the present invention is not limited to the above-described embodiment, but is a multi-cylinder or single-cylinder engine. Irrespective of the arrangement angle of the cylinder. Further, in the present embodiment, the case where the repulsion state is magnetically formed by the permanent magnet has been described as an example. However, the present invention is not limited to the above embodiment, and an electromagnet may be used. As long as it can form the non-contact support state of the shaft, it can be appropriately applied.

[0047]

According to the first aspect of the present invention, in a reciprocating engine, side thrust generated between a piston disposed in a cylinder and an inner wall of the cylinder is prevented, and explosion of fuel generated in the cylinder is prevented. Thus, it is possible to provide a highly efficient reciprocating engine by reducing the loss caused by the energy extraction caused by the above.

According to the second and third aspects of the present invention, in addition to the effect of the first aspect, a horizontally opposed reciprocating engine with further reduced energy extraction loss is provided. In the invention according to claims 4 to 6, claims 1, 2 and 3
In addition to the effects described, reciprocin with better energy transfer efficiency is provided. According to the seventh aspect of the invention, in addition to the effects of the first, second, third, fourth, fifth, and sixth aspects, a horizontally opposed four-cylinder engine having excellent output energy efficiency is provided.

According to the invention of claim 8, claim 1 is
In addition to the effects of the inventions described in 7 to 7, a connecting rod applied to reciprodin, which has better energy transmission efficiency, is provided.

[Brief description of the drawings]

FIG. 1 is a plan view of a reciprocating engine according to the present invention,
FIG. 1 is a perspective view showing an embodiment applied to a cylinder engine.

FIG. 2 shows a reciprocating engine according to the present invention with a horizontally opposed 4
FIG. 2 is a diagram illustrating an embodiment applied to a cylinder engine, and is a conceptual diagram illustrating a relationship among a piston, a piston shaft, an output shaft, a hydraulic cylinder, and a hydraulic motor.

FIG. 3 is a view showing one embodiment of a reciprocating engine according to the present invention, and showing a relationship between an output shaft and a support portion.

FIG. 4 is a view showing one embodiment of a reciprocating engine according to the present invention, and showing a relationship between an output shaft and a support portion.

FIG. 5 is a sectional view showing an embodiment of a hydraulic motor applied to the reciprocating engine according to the present invention.

FIG. 6 is an explanatory diagram showing a relationship between a piston and a connecting rod of a conventional reciprocating engine and showing a state of a side thrust of the piston.

DESCRIPTION OF SYMBOLS 10 Reciprocating engine 11 Cylinder block 12 Cylinder 13 Piston 14 Hydraulic motor 15 Connecting rod 16 Piston shaft 17 Joining shaft 18 Piston pin 19 Output shaft 20 Support section 21 Permanent magnet (magnetism generating section) 22 Roller bearing 23 Hydraulic cylinder 24 Piston 25 Oil supply path 26 Rotor 27 Vane 28 Supply hole 29 Oil return path 30 Output shaft 31 Oil circulation path 32 One-way valve 33 One-way valve 34 Housing 35 Upper end side 36 Lower end side 37 Cylinder 38 Piston 39 Connecting rod 40 Crankshaft 41 reciprocating engine 42 end

Claims (8)

[Claims] 1. A reciprocating motion of a piston shaft is converted into a rotary motion by a hydraulic motor to which a reciprocating motion of the piston shaft is input, and a piston shaft joined to a piston disposed in a cylinder. A reciprocating engine characterized by being output. 2. A piston shaft for connecting a plurality of pistons disposed in a cylinder provided to face each other in the axial direction, and a piston shaft provided on the shaft, reciprocating in a movement direction of the piston, and An output shaft that outputs kinetic energy generated by the reciprocating motion; and a support portion for the output shaft. The output shaft is supported by the supporting portion in a non-contact state, and the reciprocating motion of the output shaft is input to a hydraulic motor. 2. The reciprocating engine according to claim 1, wherein the reciprocating motion of the output shaft is converted into a rotary motion by a hydraulic motor. 3. The hydraulic motor according to claim 2, wherein the output shaft is joined to a hydraulic cylinder, and the hydraulic pressure generated by the hydraulic cylinder is supplied to the hydraulic motor.
The reciprocating engine described. 4. The output shaft is provided with a magnetism generating portion, and the support portion is also provided with a magnetism generating portion for generating the same magnetism as the magnetism generating portion, wherein the output shaft is supported by the support portion. 4. The reciprocating engine according to claim 2, wherein the reciprocating engines are supported in a non-contact state by mutual repulsion of magnetism. 5. The reciprocating engine according to claim 2, wherein said support portion is provided with a roller bearing, and said output shaft is guided by said roller bearing. 6. The reciprocating engine according to claim 2, wherein a permanent magnet is provided in the magnetism generating section. 7. The reciprocating engine is a horizontally opposed four-cylinder engine, in which two piston shafts for joining a pair of pistons to each other and these piston shafts are substantially perpendicular to the direction of reciprocation of the pistons. And an output shaft provided on the joint shaft, wherein the piston shaft and the joint shaft form an H-shaped connecting rod. , 4, 5 or 6. 8. A connecting rod for joining a plurality of pistons arranged in a cylinder, the piston having both ends joined to respective opposed pistons, and provided on the shaft, in a direction of movement of the pistons. An output shaft that reciprocates along and outputs kinetic energy generated by the reciprocating motion of the piston; and a support portion for the output shaft. The output shaft is supported by the support portion in a non-contact state. A connecting rod for a reciprocating engine.