JPH0264274A - Compressor - Google Patents

Abstract

PURPOSE:To make the whole shape small by driving a piston with a driving shaft, radially forming four sliding holes at the interval of 90 deg., and sucking and discharging four pistons in sequence in one rotation of the driving shaft. CONSTITUTION:Pistons 7 are inserted into sliding holes 6 of a block 1 radially formed with a four sliding holes 6 at the interval of 90 deg.. Suction valves 42 and exhaust valves 56 each made of a check valve are provided on the sliding holes 6. The exhaust valves 56 are connected to one discharge port 59. The pistons 7 are driven by a driving shaft 18. Four pistons 7 perform suction and discharge strokes in sequence in one rotation of the driving shaft 18. The whole shape can be made small-sized, and a large displacement can be secured.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a compressor that pressurizes and discharges a gas such as air, and particularly relates to a compact and large-capacity compressor.

Problems to be Solved by the Prior Art and the Invention Conventionally commonly used compressors have a structure in which the drive shaft is a crankshaft, and the eccentric shaft and the piston are connected by a connecting rod, similar to a reciprocating engine. Therefore, a certain amount of space is required between the piston and the crankshaft for the connecting rod to rotate and reciprocate, and the crankshaft is subject to a large bending moment.
Furthermore, since a large buckling load acts on each of the connecting rods, it is necessary to form them into a strong shape, resulting in a disadvantage that the overall size and weight of the connecting rods becomes large.

Means for Solving the Problems The present invention, as a means for solving such problems, involves fitting a piston into each sliding hole of a block in which four sliding holes are formed radially at 90° intervals. A rectangular drive body that slides in close contact with the sliding surface formed on the bottom of each piston is fitted into the center of the block, and a circular drive body whose axis is perpendicular to the sliding direction of each piston is fitted into the center of the block. A hole is formed, and a rotating body formed integrally with the drive shaft around an axis eccentric to the drive shaft is tightly fitted into the circular hole, each sliding hole is closed with a cover, and each cover and each sliding A compression spring was installed between the holes, and each sliding hole was provided with an intake valve and an exhaust valve consisting of a check valve, and the exhaust valve was connected to one discharge port.

Effects and Effects of the Invention The present invention has the above configuration, and when the drive shaft is rotated by the engine or motor, the rotating body integrally formed with the drive shaft causes eccentric movement, so that the drive body revolves around the drive shaft. This causes each piston to sequentially reciprocate toward and away from the axis, changing the volume inside the sliding hole. When the volume increases, the exhaust valve closes and the intake valve closes. When the intake valve opens, gas is inhaled, and when the volume decreases, the intake valve closes and the exhaust valve opens, which pressurizes the gas and discharges it from the discharge port, without using a connecting rod. Since the piston is driven by the piston, there is no need for a large space between the drive shaft and the piston, which eliminates the need for parts that are subject to large buckling loads, such as connecting rods, or parts that are subject to large bending moments, such as the crankshaft. Since it does not exist, there is no need to make each component particularly strong to increase rigidity, and since the four sliding holes are formed radially at 90° intervals, the axial length is shortened. Since the four pistons sequentially suction and discharge one rotation of the drive shaft, the overall shape can be made small and a large capacity can be secured, and the drive motor can also be made smaller. There is.

EXAMPLE Hereinafter, an example of the present invention will be described based on FIGS. 1 to 4.

In the figure, ■ is a body that has a hexagonal cross section with the corners of the square cut diagonally, and one end side of the body is attached to a mounting plate 3 for a motor 2, which will be described later, installed on a base 4. A rectangular horizontal fitting hole 5 is formed in the center of the body I, and holes 4 at right angles to each other on the top, bottom, left and right of the outer periphery of the body I are formed.
On each side, circular sliding holes 6 reaching the above-mentioned fitting hole 5 are formed in a radial manner at 90° intervals,
A piston 7 with a seal ring 8 fitted on its outer periphery is fitted tightly and freely into each sliding hole 6 with a stainless steel sliding plate 9 on its bottom surface. The outer end is closed by attaching the cover IO via the gasket IOa, and the fitting hole 6 has a
A rectangular drive body 11 made of Teflon with an oil groove 12 formed on the outer surface is loosely fitted into the spring receiving hole 14 formed on the outer end surface of each piston 7 and the cover! Due to the elastic expansion force of the compression coil spring 15 installed between A horizontal circular hole 17 is provided in the drive body 11, and the horizontal drive shaft 18 of the motor 2 has its axis 0. A rotating body 9 having an eccentric axis P is fitted so as to rotate integrally with a screw 20.2I, and its rotating weight 9 is inserted into the circular hole 17 of the driving body 11 through a needle bearing 22. Fitted tightly and freely rotationally.

As shown in Fig. 2.4, a side plate 24 is formed on the end face of the body l opposite to the side to which it is attached to the motor 2, and has a thick abutment part 25 formed on the outer peripheral edge of the outer surface. A placing plate 26 has an intake hole 27 formed in the center on the outside and a thick abutment 28 on the outer peripheral edge of the inner surface, and a gasket 29 is sandwiched between the abutments 25 and 28. An annular filter 30 is attached around the intake hole 27 with an annular filter 30 sandwiched therebetween, and an annular intake passage 31 is formed around the filter 30 between the side plate 24 and the lid plate 26. , four stepped mounting holes 35 are formed which communicate with the piston chamber 33 formed between each of the pistons 7 and the cover 10 through communication holes 34, and the stepped portion of each stepped hole 35 has a As shown in FIG. 3, a rubber plate 37 having a bendable tongue 38 formed thereon and a metal plate 39 having a through hole 40 formed at a position corresponding to the tip of the tongue 38 are fitted together. The air in the intake passage 3I passes through the through hole 40 of the metal plate 39, bends the tongue piece 38, and flows from the communication hole 34 to the piston chamber 33. The air from the chamber 33 is transferred to the metal plate 3 by the tongue piece 38.
An intake valve 42 is formed of a check valve that blocks the air flow toward the intake passage 31 by blocking the through hole 4o of the intake air. In addition, on the mounting surface of the body 1 to the motor 2, there is a drive shaft 1 of the motor 2, as shown in Fig. 2.3.
A side plate 44 is formed around a fitting hole 45 into which the bearing part 18a of No. 8 is fitted, and has a circumference N46 around the outer periphery of the outer surface.
7 is applied with a gasket 48 in between, and is attached to the marked mounting plate 3 of the motor 2 with screws 50, and an annular exhaust passage 51 is formed between the side plate 44 and the cover plate 47.
The i-circuit 5 exhausts each piston chamber 33 to the above-mentioned side plate 44!
Four through holes 52 are formed which are open to each other, and in the vicinity of each through hole 52, the proximal end of a rubber tongue piece 53 that closes the through hole 52 at the tip end is attached. A stopper 54 for restricting outward bending of the piston 53 is stacked and secured by a screw 55, and the air in the piston chamber 33 is allowed to flow through the exhaust passage 51 while bending the tongue piece 53, and the air from the exhaust passage 51 is
The piston chamber 33 is closed by blocking the through hole 52 with the tongue piece 53.
Exhaust valve 56 consisting of a check valve that prevents flow to the side.
is formed, and the above-mentioned exhaust passage 5K passes through an exhaust hole 58 formed in the body 1, as shown in FIG.
It communicates with a discharge port 59 formed on the outer surface between the two outer surfaces on which the sliding hole 6 of the body (2) is formed, and a connecting plug 6o is screwed into this discharge port 59.

Next, the operation of this embodiment will be explained.

When the motor 2 is started and its drive shaft 18 is rotated clockwise in FIG. While sliding on the sliding plate 9 on the bottom of the drive shaft 18
revolves in the same direction around axis 0, and as the upper piston 7 slides the compression coil spring 15 in the state shown in FIG. The volume of the piston chamber 33 decreases, the lower piston 7 slides toward the center of the body 1 by the elasticity of the compression coil spring 15, and the volume of the piston chamber 33 increases, and then,
The piston 7 on the right side slides in a direction away from the center of the body l, reducing the volume of the piston chamber 33, and the piston 7 on the left side slides toward the center, increasing the volume of the piston chamber 33. By one rotation of the driver II, the four pistons 7 sequentially repeat reciprocating movements in the direction toward and away from the center of the body violet, so that the volume of each piston chamber 33 increases or decreases, and the volume of each piston chamber 33 increases or decreases. 33 increases, the exhaust valve 56 closes and the intake valve 42 opens, allowing the filter 3 to flow from the intake hole 27.
The air led to the intake passage 3I through the piston chamber 3
3 and the volume of the piston chamber 33 decreases, the intake valve 42 closes and the exhaust valve 56 opens to pressurize the air in the piston chamber 33 and discharge it to the exhaust passage 51, then exhaust it. It is discharged through the hole 58 from a common discharge port 59, and this is performed continuously as each piston 7 moves.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of one embodiment of the present invention, FIG. 2 is a side sectional view thereof, FIG. 3 is an exploded perspective view thereof, and FIG. 4 is a partially cutaway partial perspective view of the suction side.

Claims (1)

[Claims] A piston is fitted into each of the sliding holes of a block in which four sliding holes are formed radially at 90° intervals, and a rectangular shape that slides in close contact with a sliding surface formed on the bottom surface of each piston in the center of the block. A driving body is fitted into the driving body, a circular hole whose axis is perpendicular to the sliding direction of each piston is formed in the driving body, and the driving body is integrally formed with the driving shaft centered around an axis eccentric to the driving shaft. The formed rotating body is tightly fitted into the circular hole, each of the sliding holes is closed with a cover, a compression spring is installed between each cover and each of the sliding holes, and a compression spring is installed between each of the covers and each of the sliding holes. A compressor characterized in that it is provided with an intake valve and an exhaust valve consisting of a check valve, and the exhaust valve is connected to one discharge port.