JPS5831476B2 - Atsushiyukuuchi - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a compressor having a structure in which a compressor cylinder is attached to a wall of a compressor mounting chamber (crank chamber).

In a conventional compression device, a through hole is bored in the case, a breathing plug is provided in the through hole, and the inside of the chamber in which the compressor is installed is communicated with the atmosphere through the breathing plug. The device is configured so that when the pressure inside the mounting chamber increases, the increased pressure can be released into the atmosphere through the breathing plug.

Therefore, providing a through hole and a breathing plug for releasing the increased pressure in the case will prevent dust from entering the compressor mounting chamber through the breathing plug, or conversely, mist lubricating oil inside the compressor mounting chamber may leak to the outside. There were other drawbacks.

In the present invention, the cylinder of the compressor is mounted with the flange of the cylinder in contact with the wall of the mounting chamber, and a hollow pin is press-fitted in common to the flange and the wall. The object of the present invention is to provide a compression device that eliminates the above-mentioned drawbacks of the conventional compressor by communicating with the suction side chamber instead of the atmosphere through a pin, and also having the hollow pin also serve as a fixing function for the cylinder and the wall. be.

The configuration includes a compressor mounting chamber, a cylinder having a flange, and a piston, and the cylinder is mounted with its flange in contact with a hole in the negative wall of the mounting chamber. a compressor; a suction side chamber and a discharge side chamber that communicate with the suction hole and the discharge hole of the compressor and are provided outside the mounting chamber;
It is composed of a hollow pin that is commonly inserted into the flange portion and the wall portion and press-fitted to communicate the mounting chamber and the suction side chamber.

Next, one example thereof will be explained.

FIG. 1 is a longitudinal sectional side view of one embodiment of the compression device according to the present invention, and FIG. 2 is a longitudinal sectional side view taken along line 1--2 in FIG.

In both figures, 1 is the case body, one horizontal end surface (left end in Figure 1)
It consists of a hollow rectangular casing 2 which is open and whose other end (right end in FIG. 1) is closed, and a lid plate 3 attached to one end of the casing 2 so as to cover the entire opening.

Inside the housing 2, one end of the housing 2 has a compressor mounting chamber (crank chamber) 4, and the other end thereof has a motor mounting chamber 5.

A compressor 6 is installed in the compressor installation chamber 4 .

This compressor 6 consists of a cylinder head γ, a valve seat member 8, a cylinder 9, and a piston 10.

The cylinder head 7 has a compressed fluid suction port 11 and a compressed fluid discharge port 12 at opposing positions on the circumferential side, and has a fluid inflow chamber 13 inside, and this inflow chamber 13 is connected to a partition wall 14.
It is divided into two parts, with the suction side chamber 15 on the negative side and the discharge side chamber 16 on the other side.

The cylinder head 1 is fixed to the upper surface of the upper end horizontal portion 18 of the abbreviated frame 11 disposed in the compressor mounting chamber 4 by bolts 19 screwed from the external upper surface side of the □ body 2. ing.

The valve seat member 8 has a suction hole 20 and a discharge hole 21, as well as a suction valve 22 and a discharge valve 23 for opening and closing these valves 20 and 21.

The cylinder 9 is made of a carbon steel pipe for mechanical construction, and has a hollow cylindrical shape with upper and lower ends open and a horizontal flange 24 press-formed on the upper end side.

This cylinder 9 is installed in a mounting hole 25 formed approximately at the center of the horizontal portion 18 of the frame 11, and its lower end side extends below the lower surface of the horizontal portion 18, and the upper end flange 2
4 is abutted and supported on the upper surface of the horizontal portion 18.

A valve seat member 8 is tightly attached to the upper surface of this cylinder 9 so as to cover the opening thereof.

The outer periphery of the flange 24 of the cylinder 9 and the outer periphery of the valve seat member 8 are connected to an annular step 26 provided on the lower surface of the cylinder head 7.
is engaged within.

The valve seat member 8, the flange portion 24 of the cylinder 9, and the frame 1
A through hole 27 is bored through each of the horizontal portions 1B of 7, and a fixing pin 28 is fitted into the through hole 21.

As shown in FIG. 3, the fixing pin 28 is made of a spring material and has a hollow cylindrical shape with both ends open, and has a cut portion 29 on its circumferential surface along its entire axial direction.

Then, the fixing pin 2B is held against the elasticity of the through hole 2.
The valve seat member 8 and the cylinder 9 are forcefully press-fitted into the frame 1γ, so that the valve seat member 8 and the cylinder 9 are positioned and fixed in a predetermined state with respect to the horizontal portion 18 of the frame 1γ via the fixing pin 28.

The inside of the compressor installation chamber 4 and the inside of the suction side chamber 15 are communicated through the fixing pin 28, and when the pressure inside the compressor installation chamber 4 increases due to the operation of the compressor 6, the The increased pressure is released into the suction side chamber 15 through the fixing pin 28.

The piston 10 is fitted into the cylinder 9 so as to be slidable in the directions of arrows A and B.

One end of a connecting rod 31 is connected to the piston pin 30 of the piston 10.

The other end of this connecting rod 31 is connected to an eccentric type joint 32.
is connected to one shaft 33 of the.

The other shaft 34 of this joint 32 is connected to an output rotating shaft 36 of an electric motor 35.

As the output rotating shaft 36 of this electric motor 35 rotates, the joint 3
2 and the connecting rod 31, the piston 10 slides in the directions of arrows A and B.

The electric motor 35 is mounted in the motor mounting chamber 5 of the housing 2.

Both ends of the output rotating shaft 36 of the electric motor 35 are rotated by bearings 39 and 40 respectively provided on a vertical frame 38 which is disposed facing the vertical portion 3γ of the frame 11 and this vertical portion 3T with a gap therebetween. It is freely supported.

The stator 41 of the electric motor 35 is attached to the vertical portion 3 of the frame 1γ.
1 and a vertical frame 38 with bolts 42, respectively.

A rotor 43 of the electric motor 35 is fixed to the output rotating shaft 36.

In FIG. 1, reference numeral 44 denotes a carrying handle arranged horizontally on the upper surface of the housing 2, and has a hollow cylindrical shape with one end open and the other end closed.

One end of the handle 44 is connected to the suction port 11 of the cylinder head T through the through hole 46 of the stepped portion 45 on the upper surface of the housing 2, and the other end is bolted to the earth surface on the other end side of the housing 2. Mounting hole 5 of vertical piece 49 of L-shaped mounting plate 4B attached at 41
6 is fixed in the 0.

The handle 44 has a plurality of small-diameter through holes 51 on its peripheral wall surface, and the inside of the handle 44 is communicated with the atmosphere (compressed fluid supply source) through the through holes 51 .

A filter 52 made of a material such as vinyl acetate is mounted inside one end of the handle 44 and removes dust from the fluid to be compressed.

53 is a ring-shaped filter fixing member; 54 is a ring-shaped filter fixing member; 54 is a ring-shaped filter fixing member;
A through hole 55 formed in the housing 2 is a leg piece provided on the lower surface of the housing 2.

Further, in FIG. 2, 56 is an injection port for injecting oil into the compressor installation chamber 4, 51 is a plug for closing the injection port 56, 58 is an oil level gauge that displays the amount of oil in the compressor installation chamber 4, Reference numeral 59 is an oil paddle for stirring the oil in the compressor mounting chamber 4, and is provided protrudingly from the other end of the connecting rod 31.

Reference numeral 60 denotes a weight protruding from the other shaft 34 of the joint 32, which applies an inertial force to rotation about the other shaft 34.

Next, the operation of the above configuration compression device will be explained.

When the electric motor 35 is energized to rotate the wind rotary shaft 36, the piston 10 slides in the directions of arrows A and B within the cylinder 9 via the joint 32 and the connecting rod 31, and as the piston 10 slides in the direction of arrow B, The suction valve 22 opens, and the compressed fluid flows through the through hole 51 of the handle 44, the filter 52, and the suction port 11.
, is sucked into the cylinder 9 through the suction side chamber 15 and the suction hole 20 in this order.

Then, the piston 10 moves from the sliding limit position in the arrow B direction to the arrow A
As it slides in the direction, the suction valve 22 is closed and the compressed fluid in the cylinder 9 is compressed, and the compressed fluid is released into the discharge hole 21 by opening the discharge valve 23 at that pressure.
．． The liquid is discharged to a predetermined location through the discharge side chamber 16, the discharge port 12, and the through hole 54 in this order.

In this way, the compression action is performed by alternately repeating suction and discharge as the piston 10 slides in the directions of arrows A and B.

However, when the pressure in the compressor mounting chamber 4 increases due to the compression action of the lever, the increased pressure is released into the suction side chamber 15 through the fixing pin 28.

In the above embodiments, the piston is connected to the output rotating shaft of the electric motor via an eccentric joint. The present invention can also be implemented with a device connected to the output rotating shaft of an electric motor.

As described above, according to the compression device of the present invention, the flange of the cylinder is used as a communication path between the mounting chamber and the suction side chamber by using the hollow pin fixed to the mounting chamber wall (frame). When the pressure rises, the increased pressure can be released into the suction side chamber through the communication passage with the hollow pin, and therefore the increased pressure can be reliably released to the outside without the need for special external piping to release the increased pressure in the mounting chamber. Of course, it is possible to release the increased pressure, and there is no need to provide a through hole for releasing the increased pressure or a breathing plug on the outside of the case, so dust may enter the mounting chamber, or conversely, mist lubricating oil within the mounting chamber may leak to the outside. Moreover, since the hollow pin for fixing the cylinder and frame is used as it is for the communicating path, it has the advantage that the number of component parts and the number of assembly steps can be reduced satisfactorily.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional side view of one embodiment of the compression device according to the present invention, FIG. 2 is a longitudinal sectional side view taken along the line ■-■ in FIG. 1, and FIG. 3 is a perspective view of a positioning fixing pin. 1...Case body, 4...Compressor installation chamber, 6...Compressor, T...Cylinder head, 8...Valve Seat member, 9...Cylinder, 10...Piston, 11...Suction port, 12...Discharge port, 13...Fluid inflow Chamber, 14...Partition wall, 15...Suction side chamber, 16...Discharge side chamber, 17...Frame, 18...Horizontal part , 21...Through hole, 28...Fixing pin, 29...Cut portion.

Claims (1)

[Claims] 1. A compressor comprising a compressor mounting chamber, a cylinder having a flange, and a piston, and the cylinder is mounted with the flange in contact with a hole in the negative wall of the mounting chamber; A suction side chamber and a discharge side chamber that are connected to the suction hole and the discharge hole of the compressor and are provided outside of the mounting chamber, and a mounting chamber that is commonly inserted into the flange and the wall and press-fitted and fixed thereto. and a hollow pin that communicates with the suction side chamber.