JP3478087B2 - Power generator for hydraulic system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [0001] [0001] The present invention relates to a method for controlling the air pressure of compressed air.
Converts to hydraulic pressure and supplies driving force to hydraulic processing machines, etc.
The present invention relates to a power generator for a hydraulic device. [0002] 2. Description of the Related Art Conventionally, air-oil converters have been used to increase hydraulic pressure.
The part for controlling the reciprocation of the pneumatic part and the part for actually generating hydraulic pressure
Compression drive section for parallel or serial arrangement.
What is installed is known. A power generator for a hydraulic device is disclosed in
“Portable Hydraulic Machine” is published in Hei 7-285015
Some are public. This "portable hydraulic working machine" is
To reduce the size and weight of the
The first and second chambers are defined before and after the tonhead.
And reservoirs serving as oil reservoirs in the first and second chambers.
The buses are in communication with each other. In the body including the cylinder
Oil pressurized by the motor and pump
When supplied to the first chamber behind the stone head, the first
The piston moves forward due to the supply of pressurized oil to the chamber.
And the one facing the housing at the tip of the piston
The pair of processing jigs are activated and the desired machining is performed.
It has become. The portable hydraulic working machine described in this publication is
Inside the pump case, which forms part of the body,
A reservoir is provided at an adjacent position, and a reservoir of the second chamber is provided.
Prevent the generation of negative pressure under contraction and expansion according to product fluctuation
Flexible airbag communicates with the internal atmosphere
It is arranged inside. [0006] Japanese Patent Application Laid-Open No. 7-285015 discloses a piston.
Oil into one chamber of the cylinder defined by
Supply, and provide a return spring in the other chamber,
The piston is moved by the force of the compressed air and the return
Compress the ring. The return spring is fully compressed
Drain the oil when it is
Instead, the piston is returned to the original position. Rita
The spring is coil-shaped and the piston lock
Around the door. [0007] SUMMARY OF THE INVENTION However, the conventional
The reciprocation control part of the pneumatic part and the compression drive part
Or in series, it will be large and hand-held hydraulic
Is an alienating factor in reducing the size and weight when applied to
Was. Also, Japanese Patent Application Laid-Open No. 7-285015 discloses a "portable hydraulic type.
The processing machine increases the capacity of the reservoir by increasing the driving force.
Small and lightweight when applied to hand-held hydraulic tools
There was a limit to conversion. Further, in Japanese Patent Application Laid-Open No. 7-285015,
The return spring is used to drive the piston with oil.
The parts that support the ring are not shown. But the piston
Is reciprocated by compressed air and coil spring
If the piston moves fast, move with compressed air
It is necessary to provide a damper to support the piston, but simply
If a cylindrical damper is provided inside the coil spring,
When the piston collides with the cylindrical damper and the damper expands
The damper between the windings of the coil spring.
The durability of the damper may be reduced. The present invention has been made in view of such a problem.
Supply hydraulic pressure to hand-held hydraulic tools
Can reduce the size and weight and use compressed air.
When operating the hydraulic pump, move the piston back and forth.
To stabilize the elastic force of the coil spring
The durability of the damper supporting the coil spring
The purpose is to let them. [0010] [MEANS FOR SOLVING THE PROBLEMS]
A power generator for a hydraulic device according to claim 1 of the present invention.
Connects the hydraulic pump and the air cylinder to each other in the air cylinder.
Arranged in series along the axial direction of the piston cylinder rod
And a portion of the air cylinder opposite to the hydraulic pump.
The cylinder head is installed in the
While inserting the piston rod,
At the opposite side of the hydraulic pump from the
And supply compressed air to the chamber between the cylinder head
.Providing a piston control mechanism for exhausting the air cylinder
Axial direction of the cylinder rod on the side surface of the hydraulic pump
Opening a cylindrical hole extending to the hydraulic pump of this cylindrical hole
Side part is the hydraulic pressure suction / discharge part of the hydraulic pump
At the same time, insert the front end of the cylinder rod into this cylindrical hole.
Hold the air cylinder in this cylindrical hole
When the cylinder rod is inserted through the opening
An annular damper capable of supporting the piston is provided at
The part near the piston rod of the damper to the piston
Project in the axial direction of the rod, and
The inclined surface near the inner peripheral wall of the air cylinderSmooth cross section and
To beCurve the slope to the slope
Curved along the probe and formed into a ring shape
Contact the washer with the washer and the piston
A coil spring is arranged between the coil springs.
In the direction that separates the piston from the hydraulic pump
It is characterized by being biased to. According to the power generator for a hydraulic device of the present invention,
The area near the piston rod of the damper protrudes.
The slope of the damper projection is smoothShape
ToCurved, and a washer was provided on this curved part.
The coil spring is supported on this washer
Close to the damper side of the piston.
Even if the spring is compressed, the coil spring
The damper is prevented from being pinched. For this reason, the damper
The durability is improved. In addition, the washer is on the curve of the damper.
It is curved along, so washers and coil springs
Misalignment is prevented and the elastic force of the spring becomes unstable.
Is prevented. [0012] DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a preferred embodiment of the present invention
A power generator for a hydraulic device according to the present invention will be described with reference to the drawings.
You. FIG. 1 is a diagram showing an operation of a hydraulic device according to an embodiment of the present invention.
1 schematically shows a configuration of a force generator. This hydraulic device
The main configuration of the power generator 1 will be briefly described.
The power generator 1 includes an air cylinder 2 and a hydraulic pump 3.
Pisses of the pistons 4 in the air cylinder 2 are arranged in series.
One end of the ton rod 5 is a hydraulic path of the hydraulic pump 3
The oil is held in the pressurizing chamber 34 and reciprocated by the piston 4.
Injecting and discharging oil from the pressure pump 3 to the hydraulic cylinder
It is. The air cylinder 2 on the opposite side of the hydraulic pump 3
In position, it is compressed in cooperation with piston 4 and air cylinder 2
A cylinder head 7 is provided to form an air chamber 6
Have been. The piston 4 of the cylinder head 7
A piston control mechanism P is provided on the opposite side.
The piston control mechanism P is controlled by the storage housing 52.
It is disposed inside the partitioned storage room R. Cylinder
The head 7 has a cylindrical shape with the piston rod 5 as the center.
Inner housing 8 projecting from
Cylindrical middle housing 9 located outside jing 8
It is composed of The piston control mechanism P includes an inner housing
, Middle housing 9 and inner housing 8
A cylindrical space 10 between the housing and the middle housing 9;
Cylindrical intake / exhaust for intake / exhaust of compressed air into / from chamber 6
Control valve 11 and cylinder inside inner housing 8
Protruding from the bottom of the cylindrical recess 73
Circle slidably held at the other end of the piston rod 5
It comprises a cylindrical reciprocation control valve 12. The intake / exhaust control valve 11 is connected to the air cylinder 2
When sliding to the first switching position 13 on the
6 while the compressed air is introduced into
Is moved to the second switching position 14 far away from the air cylinder 2.
The compressed air in the chamber 6 to the storage room R
Exhaust. The reciprocating motion control valve 12 has a piston 4
When located at the most compressed position of the chamber 6, the intake and exhaust control
The lube 11 is located at the first switching position 13 and the piston 4 is
Immediately before the chamber 6 is located at the most expanded position,
The lube 11 is located at the second switching position 14. The reciprocating motion control valve 12, the inner
Housing 8, intake / exhaust control valve 11, middle housing
9, the air cylinder 2 is centered on the piston rod 5.
They are arranged concentrically. In the power generator 1 for a hydraulic device, the compressed air
The air is supplied to the peripheral surface of the middle housing 9
Then, the intake / exhaust control valve 11 is moved to the first switching position 13.
The compressed air is introduced into the chamber 6 of the air cylinder 2.
And the piston 4 moves toward the hydraulic pump 3 against the urging force.
Moving. The piston 4 is located at the minimum position of the chamber 6
Just before the piston rod 5 is held at the rear end.
The intake / exhaust control valve 1 is
1 moves to the second switching position 14 side, and the compressed air
The state of supply to the housing 9 is shut off, and
The compressed air in the chamber 6 is exhausted. When the compressed air in the chamber 6 is exhausted,
The piston 4 is moved toward the cylinder head 7 by the urging force.
Return. The piston 4 moves toward the cylinder head 7 and
When it is located at the maximum position of the chamber 6, the reciprocating motion control valve 1
2 moves the intake / exhaust control valve 11 to the first switching position 13 side.
Move and again through the middle housing 9 to the chamber 6
Compressed air is introduced into the inside. Pressure on middle housing 9
When the supply of compressed air can be cut off, the piston 4 reciprocates.
Stops. Thus, the reciprocating operation of the piston 4 is controlled.
Reciprocating control valve 12, inner housing 8, suction
The exhaust control valve 11 and the middle housing 9 are
Are formed concentrically around the pad 5
In addition to promoting miniaturization and weight reduction, the piston
4, the intake / exhaust control valve 11 and the reciprocating motion control valve
The vibration with the valve 12 is attenuated. Next, each part of the power generator 1 for the hydraulic device will be described.
Will be described in detail. The power generator 1 for a hydraulic device includes a handle 1
Connection to which the air hose of compressed air is connected to the bottom 16 of 5
A mouth 17 is provided. On the front part 18 of the handle part 15
Is the compressed air introduced through the connection port 17
Supply to the supply chamber 27 formed on the outer peripheral side of the
Road 19 and used air from air cylinder 2 etc.
An exhaust path 20 for exhausting air is provided in parallel. The rear portion 21 of the handle portion 15 has
To supply and stop compressed air into the housing 9
Slide the main valve 22 along the piston rod 5.
Trigger 23 is provided for triggering. An arrangement space 2 in which the main valve 22 is arranged
4, through the upper part 25 of the handle part 15 to the trigger 23
Air passage 26 leading to a valve (not shown) operated by
The arrangement space 24 is pressurized by the valve.
It is selectively connected to a compressed air supply and an exhaust port. When the trigger 23 is not pulled, the valve
Compressed air from a compressed air source
The compressed air is supplied to the main valve 22.
Acts on the upper end surface and pushes the main valve 22 forward.
Between the supply chamber 27 and the middle housing 9.
And supply of compressed air into the middle housing 9 is interrupted.
Refused. When the trigger 23 is pulled, the spring 23 resists the urging force of the spring.
The valve is switched to the above-mentioned arrangement through the air passage 26.
The space 24 is connected to the exhaust port. This allows the placement space
The compressed air at the upper end face of the main valve 22 inside
The main valve 22 is connected to the supply chamber acting on the lower end face.
It is moved backward by the pressure of the compressed air in the
Air is supplied into the middle housing 9 and the power for the hydraulic device is
The generator 1 is operated. Further, the trigger 23 is stopped from being retracted.
When returned, the arrangement space 2 is opened via the air passage 26 by the valve.
4 is supplied to the upper end of the main valve 22
To move the main valve 22 forward,
Close the space between the chamber 27 and the middle housing 9 and
The supply of oil and stop the operation of the power generator 1 for hydraulic system
I do. The exhaust passage 20 communicates with the storage room R.
And the exhaust of the chamber 6 exhausted to the storage room R, and the intake and exhaust
The compressed air is exhausted by sliding the control valve 11 back and forth.
Is exhausted to the exhaust path 20. The exhaust path 20 is the handle 1
5 extends in front of the bottom 16 and is near the bottom of the exhaust path 20.
By the side, rectifies the exhaust of compressed air passing through the exhaust path 20
A rectifying filter F is provided. The rectifying filter F is
Fins F1 extending parallel to the flow direction of the airflow in air passage 20
The handle portion 15 is provided below the rectifying filter F.
An exhaust port A for exhausting compressed air is opened outside the
You. A trigger 2 is provided upstream of the rectifying filter F in the exhaust path 20.
The exhaust path 26 on the third side merges into one, and the exhaust path 26
And the exhaust from the exhaust path 20 are combined to form a rectifying filter.
After passing through the filter F, it is exhausted from the exhaust port A
I have. Thereby, the exhaust gas from the exhaust path 20 and the exhaust path 26
Is rectified together, and the exhaust noise is attenuated. The rear part 21 of the handle part 15 has a mid part.
To supply and stop compressed air into the housing 9
Slide the main valve 22 along the piston rod 5.
Trigger 23 is provided for triggering. The arrangement space 2 in which the main valve 22 is arranged
4, through the upper part 25 of the handle part 15 to the trigger 23
Air passage 26 leading to a valve (not shown) operated by
The arrangement space 24 is pressurized by the valve.
It is selectively connected to a compressed air supply and an exhaust port. When the trigger 23 is not pulled,
Compressed air from a compressed air source
The compressed air is supplied to the main valve 22.
Acts on the upper end surface and pushes the main valve 22 forward.
Between the supply chamber 27 and the middle housing 9.
And supply of compressed air into the middle housing 9 is interrupted.
Refused. When the trigger 23 is pulled, it resists the urging force of the spring.
The valve is switched to the above-mentioned arrangement through the air passage 26.
The space 24 is connected to the exhaust port. This allows the placement space
The compressed air at the upper end face of the main valve 22 inside
The main valve 22 is connected to the supply chamber acting on the lower end face.
It is moved backward by the pressure of the compressed air in the
Air is supplied into the middle housing 9 and the power for the hydraulic device is
The generator 1 is operated. Further, the trigger 23 is stopped from being retracted and
When returned, the arrangement space 2 is opened via the air passage 26 by the valve.
4 is supplied to the upper end of the main valve 22
To move the main valve 22 forward,
Close the space between the chamber 27 and the middle housing 9 and
The supply of oil and stop the operation of the power generator 1 for hydraulic system
I do. Air cylinder 2 in front of handle 15
, The piston 4 fixed to the piston rod 5 slides
It is freely held. The outer circumference of the air cylinder 2 is
Outer housing forming supply chamber 27 for compressed air
Cover 28. Outer housing 28
Is formed in a cylindrical shape, and the air supply passage 19 of the handle portion 15 is formed.
Is connected to A supply is provided inside the outer housing 28.
A cylindrical main valve for controlling the compressed air in the chamber 27
The valve 22 is slidably disposed. Main valve
Reference numeral 22 denotes a lower end surface that comes into contact with or separates from an upper end surface of the air cylinder 2.
Contrary, the supply chamber 27 and the middle housing
Between the outer peripheral surface of the ring 9 and the outer peripheral surface thereof. That is,
The compressed air for driving in the supply chamber 27 is generated by power for hydraulic equipment.
Supply or stop to the greige machine 1 to generate power for the hydraulic system
The greige machine 1 is started and stopped. The main valve 22 is
Middle housing while sliding against the outer periphery of the housing 9
9 to control the air pressure on the outer peripheral surface. Of middle housing 9
Inner housing 8 and middle housing arranged inside
Ring 9 constitutes the cylinder head 7 of the air cylinder 2.
ing. The front end which is one end of the air cylinder 2
A hydraulic pump 3 having a hydraulic cylinder is fixed to the section.
ing. Facing inside the air cylinder 2 of the hydraulic pump 3
The part has a circular recess with the same diameter as the inside diameter of the air cylinder 2.
A portion 30 is formed, and the inner periphery of the circular recess 30 and
A bumper 31 is fixed to the bottom. The bottom of the circular recess 30
The front end 32 of the piston rod 5 is
A cylindrical hole 33 that is freely held is formed.
The hole 33 forms a hydraulic path of the hydraulic pump 3. Fixie
The front end 32 of the rod 5 and the cylindrical hole 33 are
The pressure chamber 34 in front of the front end 32 of the door 5 is kept watertight.
So, it is sealed. The bumper 31 is made of, for example, oil-resistant butyl rubber.
Ring-shaped plastic elastomer
The central part expands toward the piston 4.
Is out. The piston rod is located at the center of the bumper 31
Near the part through which the pad 5 passes
The outer peripheral portion of the protruding portion 31a of the bumper 31
SmoothAnd has an S-shaped cross section.
You.This S-shaped inclined surface is formed on the inner peripheral wall surface of the air cylinder 4.
Air cylinder of the bumper 31
4 is inserted into the inner peripheral wall surface. A bumper 31 has an outer peripheral portion on the piston 4 side.
A ring-shaped washer 35 is provided. Washer 35
Is the shape of the peripheral surface of the bumper 31 at the center on the piston rod 5 side.
It is curved in an S shape along the shape. Inside of washer 35
Protrudes to the piston 4 side, and the protrusion of the bumper 31
While reinforcing the side, the piston 4 and the washer
A coil spring 36 for elastically biasing the member 35 in a direction away from the coil spring 36
I support. Bumper 31 is compressed air in chamber 6
Stop the piston 4 driven by the
To stop. The bumper 31 has a central portion protruding and an outer peripheral portion S
The slope is curved in the shape of a letter.
35 comes into surface contact, and a coil spring
36, the coil spring 36 is compressed.
Even if it is done, the bumper 3
1 is prevented from being pinched,
The spring 36 is stably held, and the washer 35 and
Il spring 36 is positioned at right angles to piston rod 5.
Displacement is prevented. Washer 35 and coil
Since the displacement of the spring 36 is prevented and stabilized,
The speed of the reciprocating slide of the piston 4 can be increased. On the peripheral surface of the piston 4, as shown in FIG.
, A seal ring 37 is fitted therein. Seallin
3 seals the air cylinder 2 and the peripheral surface of the piston 4
are doing. Piston 4 is provided on piston rod 5
It is supported by a fixed flange 38. Van of piston 4
Between the surface facing the par 31 and the surface on the opposite side of the bumper 31,
Vent 3 for inserting piston 4 into air cylinder 2
9 is open. Opposite side of bumper 31 of piston 4
The piston damper 40 is attached to the surface of the.
When the chamber 6 is filled with air, the piston damper 40
At the same time, the ventilation port 39 is sealed and the piston 4 is
The collision with the housing 8 is reduced. piston
On the inner housing 8 side of the damper 40, a ring-shaped
A bead 41 (see FIG. 8) is formed to protrude. This
In the embodiment, the first damper is provided on the piston 4 side.
The piston damper 40 is provided, but the first damper is
It may be provided on the side of the cylinder head 7. Between the piston 4 and the cylinder head 7
Is a chamber that expands and contracts due to intake and exhaust of compressed air
6 are formed. The chamber 6 has an inner housing
A port 42 opened to 8 faces. This port 4
2 is a lower part of the inner housing 8 and a chamber
6 extends from the surface facing 6 to the front outer peripheral surface of the cylindrical space 10
It is opened and closed by an intake / exhaust control valve 11. Poe
The main valve 22 is open as shown in FIG.
The intake / exhaust control valve 11 is located at the first switching position 13.
When the port 43b of the middle housing 9 is
It communicates with the port 69 of the air control valve 11 and
The compressed air of the bar 27 is introduced into the chamber 6. Incidentally, as shown in FIG.
When the intake / exhaust control valve 11 is located far from the hydraulic pump 3
The middle housing is located at the second switching position 14.
9 communicates with a gap 58 between the inner housing 8 and the inner housing 8.
The compressed air of the chamber 6 is exhausted to the exhaust path 20. Sand
That is, as shown in FIG.
Before reaching the position, port 42 is evacuated and
The piston 4 is moved in series by the urging force of the
By being pushed toward the nozzle head section 7, the port 42,
The compressed air in the chamber 6 is exhausted through the gap 58
You. Compressed air is injected around the air cylinder 2.
A supply chamber for supplying the chamber 6 and the air reservoir 59
A bar 27 is formed. As shown in FIG.
The member 27 includes the air cylinder 2 and the outer housing 2.
8, a cylindrical grip adapter 45, and a grip adapter.
Seal rings 46, 4 fixed to the front and rear ends of the
7 is formed. Lower part of outer housing 28
The compressed air supply passage 19 extending from the handle portion 15
Communicates. The supply path 19 is connected to the grip adapter 45.
A hole 48 through the supply chamber 27 is open. Positioned on the front end side of the outer housing 28
The sealing ring 46 is provided with a flange 49 of the hydraulic pump 3.
It is held and fixed. The seal ring 46
Outer peripheral surface of a cylinder 2 and inner periphery of outer housing 28
Sealed to maintain airtightness with the surface. Positioned on the rear end side of the outer housing 28
The sealing ring 47 is provided after the outer housing 28.
It is supported by a flange 50 protruding from the inner wall surface at the end.
You. Inside the seal ring 47, the aforementioned main valve
The front end of the slide 22 is slidably contacted. Shiruri
The ring 47 is connected to the inner peripheral surface of the outer housing 28 and the main body.
Seal to keep the air tight between the front end of the valve 22
I have. The arrangement space 51 of the main valve 22 is
Cylindrical storage housing 5 forming the front of the dollar portion 15
2, a stepped portion 53 at the rear of the middle housing 9,
The rear end of the outer housing 28 and the seal ring 47
Is divided by Stepped part of middle housing 9
Keep the airtight between the compartment 53 and the storage housing 52
It is sealed so that it can be. The main valve 22 has a substantially “L” -shaped cross section.
It is formed in an annular shape presented, and the thick portion 54 at the rear end is
Formed between storage housing 52 and middle housing 9
Is slidably arranged in the arranged space 51,
The thin lower end face is supplied facing the upper end face of the air cylinder 2.
It faces the chamber 27. The storage housing 52
The above-mentioned air passage 26 is open at the upper part of the
The rear end face of the thick portion 54 of the main valve 22 through the passage 26
Compressed air is supplied to the arrangement space 51 facing the
Means that compressed air is exhausted from the arrangement space 51
I have. The main valve 22 is connected via an air passage 26
When compressed air is supplied into the arrangement space 51,
Pressure acting on the rear end face of thick part 54 of main valve 22
The lower end face is biased to the front of the compressed air and is above the air cylinder 2.
Pressed against the end face, the supply chamber 27 and the middle
Jing 9 is shut off. Also, the pressure in the placement space 51
When the compressed air is exhausted through the air passage 26,
The biasing force of the compressed air acting on the rear end of the thick portion 54
Supply chamber 2 acting on the lower end of the thin portion
7 is deflected rearward by the action of the compressed air in
-Separated from the upper end surface of the cylinder 2, the supply chamber 27
And the middle housing 9. The front end of the middle housing 9 has an inner
Forming the cylinder head 7 together with the housing 8
Airtightly fitted inside the rear end of the air cylinder 2.
You. As shown in FIG. 3, outside the front end of the middle housing 9
A seal ring 55 is provided around the periphery, and seal ring 55 is provided.
55 to the front end of the middle housing 9 and the air syringe.
The seal with the rear end of the da 2 is provided. Middle House
A seal ring 56 is provided on the inner periphery of the front end of the ring 9.
The seal ring 56 is located at the front end of the inner housing 8.
The part and the middle housing 9 are sealed. Mid
The upper and lower parts on the air cylinder 2 side of the
Ports 43a and 43b are open. This port
43a, 43b are outer peripheries of the cylindrical inner housing 8
It may be arranged in a broken line over the entire surface. Middle housing 9 and inner housing
8 and a cylindrical shape in which an intake / exhaust control valve 11 is disposed.
A space 10 is formed. As shown in FIGS.
In addition, the rear outer peripheral wall 57 of the cylindrical space 10 is
It is formed on the jing 9 side. Rear outer peripheral wall 57 and middle
A gap 58 is provided between the housing 9 and the rear portion.
I have. The gap 58 is formed by the intake / exhaust control valve 11
When the compressed air in the chamber 6 is
Through the port 42 and the port 69 of the intake / exhaust control valve 11.
And let the air out. This gap 58 is provided for the intake and exhaust control valve.
It is formed so as to surround the periphery of the valve 11. At the rear of the cylindrical space 10, there is an intake / exhaust control.
Air is stored between the rear end of the valve 11 and
To advance the control valve 11 to the first switching position 13
Air reservoir 59 (see FIGS. 3 and 4)
Has become. In the air reservoir 59, the intake / exhaust control
Between the inner peripheral surface of the rear end of the lube 11 and the cylindrical arrangement chamber 57
Is provided with a gap 61 through which air passes in the air reservoir 59.
I have. Also, whether the front upper part of the inner housing 8
From the inner wall to the middle part, the port 62 is opened,
Cylindrical recess 73 formed inside the housing 8,
It communicates with 74. As shown in FIG.
Seal rings 75, 76 provided on inner wall surfaces
Is away from the outer peripheral surface of the reciprocation control valve 12,
Compressed air entering from port 62 is reciprocated
12 and a gap 63 between the sliding surface and the sliding surface.
Port 64 and gap 61 opened at the rear of control valve 11
And enters the air reservoir 59. That is, as shown in FIG.
Valve 11 is in a second switching position separated from air cylinder 2
When in the position 14, the port 62 of the inner housing 8 is
Is a gap 63 between the reciprocating control valve 12 and the inner housing.
A port 64 at the rear of the housing 8 communicates. This
Compressed air is introduced into the air reservoir 59 through the gap 61.
The intake / exhaust control valve 11 is moved from the second switching position 14
Move to 1 switching position 13. The intake / exhaust control valve 11 is, as shown in FIG.
Has a seal 65 on the inner wall of the air cylinder 2 side,
A seal ring 66 is provided on the outer wall on the cylinder 2 side. Ma
In addition, the inner wall of the intake / exhaust control valve 11
A recess 67 is formed on the rear side of the intake / exhaust control
On the outer wall of the lube 11 behind the seal ring 66
Has a recess 68 formed therein. Recesses 67 and 68 are ports
It communicates by 69. The recess 68 is an intake / exhaust control valve
The port 69 is intermittently formed on the entire circumference.
Surrounding. At the center of the outer wall of the intake / exhaust control valve 11
Is provided with a seal ring 70,
A recess 71 covering the entire circumference is formed on the outer wall behind the
Have been. The rear end outer wall of the intake / exhaust control valve 11
A ring 72 is provided. The seal rings 65 and 66 are
When the lube 11 is at the second switching position 14, the inner how
Port 42 of jing 8 and port 4 of middle housing 9
3a and 43b are shut off. Seal rings 66, 7
0 indicates that the intake / exhaust control valve 11 is at the first switching position 13
At this time, the ports 42, 43b, and 69 are communicated, and compressed air is
Seal to send to chamber 6. Also, seallin
The intake and exhaust control valve 11 is in the second switching position.
14, the ports 42, 69, the recess 68, the gap 5
Seal so that 8 communicates. The seal ring 72
Sealing is performed when air is stored in the air reservoir 59.
The inner housing 8 is provided at the center of the outer periphery.
The seal ring 8a is empty before and after the intake / exhaust control valve 11.
Sealing is done between. As shown in FIG.
As shown in FIG. 6, cylindrical concave portions 73 and 74 having different inner diameters.
Are connected in a row. Of the cylindrical concave portions 73 and 74
Seal rings 75 and 76 are provided on the inner wall surface, respectively.
ing. Reciprocating motion control valves are provided in the cylindrical concave portions 73 and 74.
And the seal rings 75 and 76 are housed therein.
Outside the small diameter portion 77 and the large diameter portion 78 of the return control valve 12
The port 62 of the inner housing 8 cooperates with the peripheral surface.
Compressed air coming in from the
Through the gap between the diameter portion 77 and the large diameter portion 78 and the port 64,
Supply to the air reservoir 59 or compression in the air reservoir 59
The air is exhausted to the exhaust passage. The seal rings 75 and 76 are fixed
Friction with the reciprocating control valve 12 when the rod 5 moves back
Force to slightly delay the return movement of the piston rod 5.
As a result, the reciprocating motion control valve 12 moves backward, and the seal
When the seal of the ring 80 is released, the pressure of the air reservoir 59 is reduced.
Exhaust compressed air. The reciprocating motion control valve 12 is connected to the piston rod 5
Is slidably supported at the rear end. Reciprocating motion control valve
The stopper 12 is attached to the rear end of the piston rod 5 by a stopper 79.
Slip-through is prevented. Large diameter of reciprocating motion control valve 12
A seal ring 80 is attached to a rear outer periphery of the portion 78.
And the seal ring 80 is
Passing through the concave portion 81 provided on the inner wall side edge of the port 64
Then, the air in the air reservoir 59 is exhausted. The vertical wall of the storage housing 52 has
From the air reservoir 59 of the control valve 11 through the cylindrical recess 74
Air that is exhausted and reciprocating control valve 12
Block bumpers 94 to reduce the vibration of
You. The block bumper 94 is designed to absorb vibrations easily.
For example, the inner housing is made of elastic material such as rubber.
8 is formed in an annular shape corresponding to the cross-sectional shape of the rear part.
ing. When the intake / exhaust control valve 11 is switched to the first switching position 13
To slide to the second switching position 14 from the air reservoir
From 59, the compressed air is exhausted into the cylindrical recess 74.
The air exhausted to the cylindrical recess 74
Is sent from the storage room R to the exhaust path 20. Also fixie
4 returns from the hydraulic pump 3 side to the cylinder head 7 side
At this time, the air in the chamber 6 flows into the storage room R from the gap 58.
The gas is exhausted and exhausted from the exhaust path 20. Thus, the case
Exhaust of compressed air that reciprocates the piston 4 is performed in the delivery room R.
In addition, since the air is exhausted in a ring shape, the storage room R is small.
While the ring and the axial direction of the piston rod 5
Exhaust area to ensure a sufficient exhaust area,
The speed of the reciprocating operation of the button 4 can be increased. A hydraulic cylinder is provided in front of the air cylinder 2.
A hydraulic pump 3 having a damper is fixed. The hydraulic pon
A flange 89 is formed to protrude from the periphery of the front end of the step 3.
A hydraulic cylinder 90 is bolted to the flange 89.
It is fixed by. Air cylinder of hydraulic pump 3
At the end facing the two sides, as shown in FIG.
A circular recess 35 having substantially the same diameter and the same size as the inner peripheral wall of the cylinder 2 is formed.
The center of the circular recess 35 has a piston rod.
For holding the front end 32 of the pad 5 slidably in a watertight manner.
A cylindrical hole 33 is formed. The cylindrical hole 33 is
The reservoir and the hydraulic syringe are connected through the port 85 and the hydraulic discharge port 86.
It continues to the da90. Front end 32 of piston rod 5
Is reciprocated inside the cylindrical hole 33, so that the hydraulic suction
Oil in the reservoir is sucked into the cylindrical hole 33 through the port 85.
Oil is discharged through the hydraulic discharge port 86,
It is supplied into the cylinder 90. Near the hydraulic suction port 85 and
In the vicinity of the hydraulic discharge port 86, oil in the cylindrical hole 33 is hydraulically sucked.
Oil flowing out of the inlet 85 and oil on the hydraulic cylinder 90 side
Check valve to prevent the inflow into the cylindrical hole 33
Buses 87 and 88 are provided, respectively. The hydraulic cylinder 90 reciprocates the piston 4.
By repeating the operation, the oil char in the hydraulic cylinder 90 is
The member 91 is filled with oil, and the pressing portion 92 moves forward.
The hydraulic tool is attached to the attachment holder 93
When the pressing portion 92 moves forward in the state where the
Work is performed on the hydraulic tool by the pressing operation of 2.
The hydraulic cylinder 9 is provided on the flange 89 and the hydraulic cylinder 90.
Discharge valve capable of discharging oil from oil chamber 91 inside
(Not shown). Open this discharge valve
When the oil in the oil chamber 91 is
Oil is discharged from the middle of the
Stored in the reservoir. As a hydraulic tool, for example,
Benders that bend metal bars or cut them
A cutter or the like is attached. Next, the operation of the power generator for a hydraulic device according to the present invention will be described.
The operation will be described with reference to FIGS. FIG. 2 shows the main valve when the trigger 23 is pulled.
The compressed air supplied to the rear of the valve 22 is exhausted,
The in-valve 22 retracts and the supply chamber 27 and
The state immediately after communication with the housing 9 is shown. Pis
The ton 4 is squeezed by the restoring force of the coil spring 36
Close to the vicinity of the dahead 7 and the volume of the chamber 6 is minimized.
It has become. When the main valve 22 is opened, first, the air
Supply chamber 27 formed cylindrically around cylinder 2
Of compressed air inside the middle housing 9
Via the valves 43a and 43b,
It enters the accommodated cylindrical space 10. Compressed air
Acting on the front end side of the intake / exhaust control valve 11,
The control valve 11 is retracted to the rear of the cylindrical space 10 and
From the ports 43a and 43b on the upper front part of the cylindrical space 10
Compressed air enters. The compression that has entered the front part of the cylindrical space 10
The air opens at the top of the inner housing 8
62, cylindrical recess 73 of inner housing 8, reciprocating
Clearance 63 at front edge of control valve 12, cylindrical recess 7
4, via the port 64 and the gap 61 to the air reservoir 59
Get in. The compressed air is stored in the air reservoir 59.
As shown in FIG. 3, the intake / exhaust control valve 11
And move forward so as to be close to FIG. 3 shows that the intake / exhaust control valve 11 moves forward.
A state where the first switching position 13 is stopped is shown. Intake and exhaust control bar
When the lube 11 is located at the first switching position 13, the port 43
b and a port opening at the upper front part of the inner housing 8
62 is shut off, while the lower front portion of the inner housing 8 is
Port 42 opening to the front and front of intake and exhaust control valve 11
Communicates with the port 43b which is opened at the end. Also port
The compressed air entering from 43b is
It is supplied to the air reservoir 59 via the port 62 at the front end,
I am. The compressed air in the supply chamber 27
b, after piston 4 in chamber 6 via 69, 42
Supplied to the surface, and the piston 4 shifts to the hydraulic pump 3 side
You. This piston 4 compresses the coil spring 36
The elastic urging force of the coil spring 36 is increased.
When the piston 4 moves to the hydraulic pump 3 side, the piston
The rod 5 enters into the deep portions of the cylindrical concave portions 73 and 74,
A return control valve 12 is formed at the rear end of the piston rod 5.
Is moved forward by the stopper 79
The communication between the recess 74 and the port 64 is blocked. The piston 4 compresses the coil spring 36
Until the chamber 6 reaches the most expanded position.
First, as shown in FIG.
The seal between the ring 80 and the recess 81 is released. C
Release of the seal between the ring 80 and the recess 81, the air
The air in the reservoir 59 is filled with the gap 58, the port 64,
Exhaust through the gap between the lube 12 and the inner wall of the cylindrical recess 74.
It is. The piston rod 5 is closest to the hydraulic pump 3 side.
In order to get closer to the stopper 79 at the rear end of the piston rod 5
As a result, the reciprocation control valve 12 is
Insert into the step. When the air in the air reservoir 59 is exhausted, FIG.
As shown in the figure, the intake / exhaust control valve 11 is
Moved to the second switching position 14 by the action of the compressed air used
I do. Thereby, the chamber 6 and the ports 42, 69,
The gap 58 communicates with the exhaust path 20, and the air in the chamber 6
The piston 4 is exhausted and the coil spring 36
Moves to the cylinder head 7 side by the
I will. When the intake / exhaust control valve 11 is in the second switching position 14
When the chamber 6 communicates with the exhaust path 20,
As shown, the piston 4 springs out of the coil spring 36.
The urging force moves the piston 4 to the cylinder head 7 side.
Move. As the piston 4 moves, the piston rod 5
It moves to the vertical wall side of the storage housing 52. Reciprocating motion control bar
The lube 12 is friction caused by sliding with the seal rings 75 and 76.
Due to the resistance, etc., the cylindrical recess 73, 73
Compressed air that acts on the front end face
It moves backward by the action of air,
Moves toward the vertical wall of the storage housing 52. As shown in FIG. 7, the piston 4 is
Reciprocating death on the cylinder head 7 side approaching the head 7 side
Immediately before reaching the point, the
The port 62 is again fitted with the cylindrical recess 73 and the reciprocating control valve.
12 gaps (between seal rings 75 and 76), cylindrical recess
74 (the seal ring 7)
6,80), air reservoir via port 64 and gap 61
And communicate with 59. As a result, air is stored in the air reservoir 59.
The intake / exhaust control valve located at the second switching position 14 starts to accumulate.
The lube 11 starts to move toward the first switching position 13. When the intake / exhaust control valve 11 is in the first switching position 13
When you move toward, the state transits again to the state shown in Fig. 2.
Then, the steps between FIG. 7 are repeated. With trigger 23 pulled
Main valve 22 is maintained in the supply chamber 2
Piston 4 repeats reciprocating motion as long as 7 is released
When driven, the hydraulic pump 85 shown in FIG.
Oil is sucked from the hydraulic cylinder 90 through the hydraulic discharge port 86.
Oil is filled in the oil chamber 91 of the
90 can do the job. As described above, the reciprocating motion control valve 12 and the suction
When the exhaust control valve 11 reciprocates, the storage housing
52. A block van made of an elastic material attached to a vertical wall of 52.
The circle 94 extends from the air reservoir 59 of the intake / exhaust control valve 11.
Compressed air exhausted through the cylindrical concave portion 74;
Clearance between dollar housing 9 and inner housing 8
Receiving compressed air from the storage housing 52
Suppress vibration of vertical wall, reciprocation control valve 12 vibration and
The vibration of the intake / exhaust control valve 11 is reduced. [0076] According to the power generator for a hydraulic device of the present invention,
In this case, the part near the piston rod of the damper protrudes,
The slope of the projection of this damper is smoothly curved in an S-shape.
Then, a washer is provided in this curved part, and this washer is provided.
As the coil spring is supported on the washer,
The coil spring is compressed by approaching the damper side of the piston
The damper is caught in the winding part of the coil spring.
Is prevented. This improves the durability of the damper.
Up. Also, the washer is curved along the curve of the damper
Misalignment of washers and coil springs
Is prevented, and the elastic force of the spring is prevented from becoming unstable.
It is. Therefore, the power generator for a hydraulic device according to the present invention
According to the case where hydraulic pressure is supplied to a hand-held hydraulic tool
In addition, the use of compressed air
When operating the hydraulic pump, reciprocate the piston.
Stabilizes the elastic force of the coil spring for
Improves the durability of the damper supporting the il spring
be able to.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a cross-sectional view showing a main configuration of a hydraulic power generator according to an embodiment of the present invention. FIG. 2 is a piston of the hydraulic power generator of FIG. FIG. 3 is a cross-sectional view of a state in which the piston approaches the head unit. FIG. 3 is a cross-sectional view of a state in which compressed air enters the chamber of the power generator for the hydraulic apparatus of FIG. 1 and the piston starts to advance. FIG. 5 is a cross-sectional view of a state in which a piston of the power generator for moving toward the maximum position of the chamber. FIG. 5 shows a state where the piston of the power generator for hydraulic device of FIG. FIG. 6 is a cross-sectional view of a state in which the air conditioner is located at the second switching position. FIG. 6 is a perspective view showing the piston of the hydraulic power generator of FIG. FIG. 7 is a sectional view of the state. FIG. 8 is a cross-sectional view of a state in which a piston of a power generator for a hydraulic device approaches a cylinder head side and compressed air starts to enter an air reservoir at a rear portion of the intake / exhaust control valve. FIG. 8 is a cross-sectional view of a piston rod and a reciprocating control valve. [Description of Signs] 1 Power generator for hydraulic device 2 Air cylinder 3 Hydraulic pump 4 Piston 5 Piston rod 6 Chamber 7 Cylinder head 8 Inner housing 9 Middle housing 10 Cylindrical space 11 Intake / exhaust control valve 12 Reciprocating control valve 13 First switching position 14 Second switching position 15 Handle portion 19 Supply path 20 Exhaust path 22 Main valve 27 Supply chamber 28 Outer housing 31 Bumper 31a Projection 33 Cylindrical hole 34 Pressurizing chamber 35 Washer 36 Coil spring 39 Vent 40 Piston Damper 42 Port 43a, 43b Port 52 rating Housing 69 Port 85 hydraulic inlet 86 hydraulic discharge port 94 the piston damper P piston control mechanism R storing room

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) F15B 3/00 F15B 15/22 B25F 5/00-5/02 F01B 7/20

Claims (1)

(57) [Claim 1] A hydraulic pump and an air cylinder are arranged in series along the axial direction of a cylinder rod of a piston in an air cylinder, and the hydraulic pump and the air cylinder are opposite to the hydraulic pump of the air cylinder. A cylinder head portion is provided at the side portion, and the piston rod is inserted through the cylinder head portion, and the cylinder head portion is compressed at a position on the opposite side of the hydraulic pump to the chamber between the piston and the cylinder head portion. A piston control mechanism for supplying / exhausting air is provided; a cylindrical hole extending in the axial direction of the cylinder rod is opened on a side wall surface of the hydraulic pump of the air cylinder; a portion of the cylindrical hole on the hydraulic pump side is connected to the hydraulic pump; And the front end of the cylinder rod is slidably held in the cylindrical hole, and the cylindrical hole is At the opening edge in the air cylinder, an annular damper capable of supporting the piston while inserting the cylinder rod is provided, and a portion near the piston rod of the damper is protruded in the axial direction of the piston rod, the inclined surface of the air cylinder wall near the protruding portion of the damper synovial
A curve is formed so as to have a clear cross-sectional shape, and a washer formed in a ring shape while being curved along the curve of the slope is brought into contact with the slope, and a coil is provided between the washer and the piston. A power generator for a hydraulic device, wherein a spring is disposed, and the piston is biased by the coil spring in a direction away from the hydraulic pump.