WO1998003312A1 - Appareil generateur de vibrations - Google Patents

Appareil generateur de vibrations Download PDF

Info

Publication number
WO1998003312A1
WO1998003312A1 PCT/JP1997/002492 JP9702492W WO9803312A1 WO 1998003312 A1 WO1998003312 A1 WO 1998003312A1 JP 9702492 W JP9702492 W JP 9702492W WO 9803312 A1 WO9803312 A1 WO 9803312A1
Authority
WO
WIPO (PCT)
Prior art keywords
chamber
piston
switching valve
switching means
main
Prior art date
Application number
PCT/JP1997/002492
Other languages
English (en)
Japanese (ja)
Inventor
Naoki Ishizaki
Shigeru Shinohara
Takayuki Muto
Mitsuru Arai
Original Assignee
Komatsu Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Komatsu Ltd. filed Critical Komatsu Ltd.
Publication of WO1998003312A1 publication Critical patent/WO1998003312A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
    • B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
    • B06B1/00—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency
    • B06B1/18—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency wherein the vibrator is actuated by pressure fluid
    • B06B1/183—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency wherein the vibrator is actuated by pressure fluid operating with reciprocating masses
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C19/00—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
    • E01C19/22—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for consolidating or finishing laid-down unset materials
    • E01C19/23—Rollers therefor; Such rollers usable also for compacting soil
    • E01C19/28—Vibrated rollers or rollers subjected to impacts, e.g. hammering blows
    • E01C19/286—Vibration or impact-imparting means; Arrangement, mounting or adjustment thereof; Construction or mounting of the rolling elements, transmission or drive thereto, e.g. to vibrator mounted inside the roll
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D9/00—Portable percussive tools with fluid-pressure drive, i.e. driven directly by fluids, e.g. having several percussive tool bits operated simultaneously
    • B25D9/14—Control devices for the reciprocating piston

Definitions

  • the present invention relates to a vibration generator used for a breaker used for crushing work, a rolling machine used for rolling work, and the like.
  • a piston is inserted into a cylinder hole of a main body to form a first chamber and a second chamber at both ends of the piston, and a pressure receiving area of the first chamber is formed. Is smaller than the pressure receiving area of the second chamber, the first chamber is always connected to the hydraulic pressure source, and the second chamber alternately communicates with the hydraulic pressure source and the tank based on the reciprocation of the piston. It is known to reciprocate the ton in the working direction and the return direction.
  • the piston operating speed of the above-mentioned vibration generator is increased by reducing the difference in pressure receiving area between the first and second chambers and increasing the moving speed per flow rate, and the thrust of the piston is increased. Is increased by increasing the pressure receiving area difference between the first and second chambers and increasing the area on which hydraulic pressure acts to generate thrust.
  • the applicant has previously proposed a vibration generator capable of changing the pressure receiving area difference between the first chamber and the second chamber, but this apparatus is composed of the first chamber and the second chamber. There is a limit to changing the pressure receiving area difference with the chamber, and large thrust cannot be obtained.
  • an object of the present invention is to provide a vibration generator capable of solving the above-mentioned problem. Disclosure of the invention
  • One mode of the vibration generator according to the present invention for achieving the above object is as follows.
  • a first chamber in which a piston having a rod is inserted into a cylinder hole of the main body to move the piston in a returning direction, and a first chamber for moving the piston in a working direction.
  • a cylinder section defining a second chamber and an auxiliary chamber having a larger pressure receiving area than the first chamber;
  • a main switching valve for switching between a second position communicating the second chamber with a tank and a second position communicating the second chamber with a hydraulic pressure source
  • the auxiliary chamber In conjunction with the movement of the piston, the auxiliary chamber is connected to a hydraulic source and a tank.
  • a first switching means for switching and communicating the main switching valve between a first position and a second position.
  • a breaker position which is operated by an external signal to communicate the first chamber to a hydraulic pressure source and to cut off the operating pressure for the main switching valve from the first switching valve, and to communicate the first chamber to the tank and Second switching means for switching to a rolling position for communicating the operating pressure for the main switching valve from the first switching valve,
  • the first switching means communicates the auxiliary chamber to a hydraulic pressure source when the piston returns to the stroke end position and connects the main switching valve to the second switching valve.
  • the auxiliary chamber communicates with the tank, and when the piston comes to the working direction stroke position, the main switching valve is directly operated. Is the first position,
  • the first switching means communicates the auxiliary chamber to a hydraulic pressure source and sets the main switching valve to the second position when the piston reaches the return stroke position.
  • the auxiliary chamber communicates with the tank and the main switching valve is set to the first position via the second switching means. Things.
  • the piston in the return stroke stroke position has a large thrust at the start of the movement in the working direction, so that the piston starts to move quickly, and after the piston starts moving. Moves at high speed to the working direction stroke end position.
  • the present invention is a vibration generator suitable for a breaker operation.
  • the piston when the second switching means is at the rolling position D, the piston is always in communication with the tank, so the piston receives (pressure receiving area of the second chamber + pressure receiving area of the auxiliary chamber) It moves in the working direction by hydraulic pressure acting on the sum of the areas, and its thrust is large.
  • the main switching valve moves to the second position and the auxiliary chamber communicates with the tank, so that the reciprocating stroke of the piston is short. It becomes like this.
  • the thrust of the piston is large, and the number of reciprocating movements of the piston per unit time, that is, the frequency is increased.
  • the present invention is a vibration generator suitable for the rolling work.
  • FIG. 1 is a configuration explanatory view showing one embodiment of the vibration generator according to the present invention.
  • FIG. 2 is an explanatory diagram of a state where the switching valve is switched in the above embodiment.
  • FIG. 3 is an explanatory diagram of a case where the above embodiment is attached to the tip of an arm of a hydraulic shovel to perform a rolling operation.
  • a piston 3 is inserted into a cylinder hole 2 of the main body 1, a large-diameter rod 3a is inserted on one side of the piston 3, and an intermediate-diameter rod is inserted on the other side.
  • the first chamber 4 is provided with a rod 3b and a small-diameter rod 3c connected to the rod 3b.
  • One side of the piston 3 is provided with a first chamber 4 for pushing the piston 3 in the return direction.
  • a second chamber 5 that has a larger pressure receiving area than the first chamber 4 that pushes 3 in the working direction and an auxiliary chamber 6 that pushes the piston 3 in the working direction are defined, and these constitute the cylinder section 7. are doing.
  • the valve mechanism 10 includes the first pump port 11, the second pump port 12 -tank port 13, the i-th auxiliary port 14, the second auxiliary port 15 .
  • the main port 16, the auxiliary inlet It has a port 17 and an auxiliary outlet port 18 so that it can be switched to the first position a, the second position b, the third position c, and the fourth position d in conjunction with the movement of the piston 3. ing.
  • the main switching valve 20 has first, second, third, and fourth ports 21, 22, 23, and 24, and the first position A is determined by the pressure applied to the first pressure receiving portion 25. And the pressure on the second pressure receiving part 26 comes to the second position B.
  • the first port 21 communicates with the discharge path 27 a of the hydraulic pump 27, the second port 22 communicates with the second auxiliary port 15 of the valve mechanism 10, and the third port 2 3 communicates with the tank 28, and the fourth port 24 communicates with the second chamber 5 of the cylinder part 7 and the auxiliary inlet port 17 of the valve mechanism 10.
  • the switching valve 30 is held at the breaker position C by the spring 31 and becomes the rolling position D when the pressure oil is supplied to the pressure receiving portion 32.
  • the pressure receiving section 32 is supplied with and stopped by the hydraulic pressure pilot valve 33 from the hydraulic pressure discharge from the auxiliary hydraulic pump 34.
  • the switching valve 30 When the switching valve 30 is at the breaker position C, the first port 35 and the third port 37 are in communication, the second port 36 and the fifth port 39 are in communication, The fourth port 38 is shut off.
  • the switching valve 30 When the switching valve 30 is at the rolling position D, the first port 35 communicates with the fourth port 38, and the fourth port 38 communicates with the fourth port 38.
  • the third port 37 and the fifth port 39 communicate with each other, and the second port 36 is shut off.
  • the first port 35 is connected to one inlet side of a shuttle valve 40, and the other inlet side of the shuttle valve 40 is connected to a main port 16 of a valve mechanism 10.
  • the outlet side of the shuttle valve 40 is connected to the first pressure receiving portion 25 of the main switching valve 20.
  • the second port 36 is connected to a discharge path 27 a of a hydraulic pump 27, the third port 37 is connected to a tank 28, and the fourth port 38 is a valve mechanism 1. 0 is connected to the first auxiliary port 14, and the fifth port 39 is connected to the first chamber 4.
  • the discharge path 27 a of the hydraulic pump 27 is connected to both the first and second pump ports 11 1 and 12 of the valve mechanism 10, and the main switching valve 20 is connected to the second pressure receiving section 26.
  • the pressure receiving area of the first pressure receiving chamber 25 of the main switching valve 20 is larger than the pressure receiving area of the second pressure receiving chamber 26.
  • the valve mechanism 10 (first switching means) is in the fourth position d, at which time the auxiliary inlet port 17 and the auxiliary outlet port 18 communicate, and the main port 16 is connected to the tank port 13 Since the first port 35 of the switching valve 30 (the second switching means) communicates with the tank 28 through the third port 37, the main switching is performed. No pressure oil is supplied to the first pressure receiving chamber 25 of the valve 20, and the first pressure receiving chamber 25 is in communication with the tank 28, so that the main switching valve 20 is connected to the second pressure receiving section.
  • the second position B is set by the discharge pressure of the hydraulic pump 27 acting on 26.
  • the discharge pressure oil of the hydraulic pump 27 is supplied to the second chamber 5, the auxiliary chamber 6, and the first chamber 4 of the cylinder section 7 through the fourth port 24, so that (the second The piston 3 moves to the left (working direction) due to the hydraulic pressure acting on the pressure receiving area difference that is the pressure receiving area of the chamber 5 + the pressure receiving area of the auxiliary chamber 6-the pressure receiving area of the first chamber 4). Since the pressure receiving area difference at this time is large, the thrust to push the piston 3 in the working direction is large.
  • valve mechanism 10 As the piston 3 moves to the left, the valve mechanism 10 is sequentially switched to the third position c and the second position b.
  • the valve mechanism 10 When the valve mechanism 10 is in the second position b, the auxiliary inlet port 17 is shut off, the auxiliary outlet port 18 communicates with the tank port 13 and the auxiliary chamber 6 communicates with the tank 28 So The piston 3 moves to the left by the hydraulic pressure acting on the pressure receiving area difference of (pressure receiving area of the second chamber 5-pressure receiving area of the first chamber 4).
  • the valve mechanism 10 becomes the first position a, and the discharge pressure oil of the hydraulic pump 27 becomes the second pump port 12, It flows into the shuttle valve 40 from the port 16 and is supplied from the outlet side of the shuttle valve 40 to the first pressure receiving section 25 of the main switching valve 20.
  • the main switching valve 20 is switched to the first position A, so that the pressure oil in the second chamber 5 of the cylinder 7 is discharged from the fourth port 24 and the third port 23.
  • the oil in the auxiliary chamber 6 flows out to the tank 28, and the hydraulic oil in the auxiliary chamber 6 flows out of the auxiliary outlet port 18 and the tank port 13 to the tank 28. Therefore, the piston 2 moves to the right due to the pressure in the first chamber 4.
  • the valve mechanism 10 moves to the second position b, the third position c, and the fourth position d, and the state described above is reached.
  • the thrust is a dog at the initial stage of moving the piston 3 in the working direction, and therefore the inertia when the piston 3 moves in the returning direction is determined.
  • the piston 3 can start moving in the working direction against the force (proportional to the mass of the piston 3 and the rod), and the piston 3 starts moving in the working direction after the piston 3 starts moving in the working direction.
  • the piston 3 can move at high speed, so that the piston 3 moves quickly in the working direction and also moves quickly in the returning direction. Therefore, the present embodiment is preferable as a vibration generating device for a breaker operation.
  • the switching valve 30 When the switching valve 30 is in the rolling position D, the first chamber 4 of the cylinder 7 is connected to the tank 28 from the fifth port 39 and the third port 37 of the switching valve 30.
  • the first auxiliary port 14 of the valve mechanism 10 communicates with the fourth port 38 and the first port 35 to one inlet side of the shuttle valve 40.
  • the valve mechanism 10 When the piston 3 is in the right-stroke position, the valve mechanism 10 is in the fourth position d and the main switching valve 20 is in the second position B as described above. As a result, the discharge pressure of the hydraulic pump 27 is supplied to the second chamber 5 and the auxiliary chamber 6 of the cylinder section 7, and the piston 3 moves in the working direction.
  • the piston 3 is pushed in the working direction by the hydraulic pressure acting on the sum of the pressure receiving areas of (the pressure receiving area of the second chamber 5 + the pressure receiving area of the auxiliary chamber 6), Since the sum of the pressure receiving areas is larger by the pressure receiving area of the first chamber 4 than the area when the switching valve 30 is set to the breaker position C, the thrust for pushing the piston 3 in the working direction is large. Therefore, the present embodiment is preferable as a vibration generator for a rolling machine.
  • the first pump port 11 communicates with the first auxiliary port 14 so that the hydraulic pump 27
  • the discharge pressure flows into one inlet of the shuttle valve 40 via the valve mechanism 10 and the switching valve 30 and acts on the first pressure receiving portion 25 of the main switching valve 20 to cause the main switching valve 20 to operate.
  • the second chamber 5 of the cylinder section 7 communicates with the tank 28 by the main switching valve 20 c.
  • the auxiliary chamber 6 of the cylinder section 7 communicates with the tank 28 via the valve mechanism 10. I do.
  • the piston 3 moves to the right by an external force, and when it reaches the right stroke end position, the piston 3 moves in the working direction again as described above.
  • this embodiment is suitable as a vibration generator for a rolling machine.
  • an upper vehicle body 51 is pivotally mounted on a lower traveling body 50, and a boom 52 is mounted on the upper vehicle body 51 so that the boom can be vertically swung by a boom cylinder 53.
  • the arm 54 is mounted on the boom 52 such that the arm 54 can be swung up and down by the arm cylinder 55.
  • the main body 1 is attached to the tip of the arm 54. Attach the work machine cylinder 56 and the link 57 so that it can swing freely, leave the bom cylinder 53 floating and load the rod 3a with the boom weight and arm weight.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Percussive Tools And Related Accessories (AREA)
  • Road Paving Machines (AREA)

Abstract

L'invention concerne une appareil générateur de vibrations utilisé pour des broyeurs de concassage et pour des compacteurs à rouleaux ainsi que dans le compactage à rouleaux. Selon l'invention, l'appareil générateur de vibrations est adapté à un travail de broyage du fait qu'un piston (3) va et vient à haute vitesse lorsqu'un second moyen de commutation (30) se trouve dans une position (C) du broyeur. L'appareil générateur de vibrations est adapté au compactage à rouleaux du fait que la poussée du piston est élevée et du fait du grand nombre de vibrations de va et vient du piston par temps unitaire, c'est à dire la fréquence, lorsque le second moyen de commutation se trouve dans une position (D) de compactage à rouleaux.
PCT/JP1997/002492 1996-07-18 1997-07-17 Appareil generateur de vibrations WO1998003312A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP18930496A JP3729428B2 (ja) 1996-07-18 1996-07-18 振動発生装置
JP8/189304 1996-07-18

Publications (1)

Publication Number Publication Date
WO1998003312A1 true WO1998003312A1 (fr) 1998-01-29

Family

ID=16239102

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP1997/002492 WO1998003312A1 (fr) 1996-07-18 1997-07-17 Appareil generateur de vibrations

Country Status (3)

Country Link
JP (1) JP3729428B2 (fr)
KR (1) KR980009761A (fr)
WO (1) WO1998003312A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI116124B (fi) * 2004-02-23 2005-09-30 Sandvik Tamrock Oy Painenestekäyttöinen iskulaite

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06262543A (ja) * 1993-03-11 1994-09-20 Teisaku:Kk 打撃装置

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06262543A (ja) * 1993-03-11 1994-09-20 Teisaku:Kk 打撃装置

Also Published As

Publication number Publication date
KR980009761A (ko) 1998-04-30
JPH1034562A (ja) 1998-02-10
JP3729428B2 (ja) 2005-12-21

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