JP2017141552A - Crushing machine and hydraulic driving apparatus comprising the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To realize efficient storage of working oil led out from a driving cylinder for reducing driving power loss of a building machine.SOLUTION: A crushing machine 9 comprises: a crushing machine main body 14, crushing arms 15 which are rotatably arranged to the crushing machine main body 14, crushing cylinders 16 which make the crushing arms 15 to rotate in a manner where extending action thereof makes tip end parts of the crushing arms 15 to be closed each other and shrinking action thereof makes tip end parts of the crushing arms 15 to be apart each other, and a storing container 17. The storing container 17 comprises a container main body 18 and a movable member 19 which forms a storage room S2 together with the container main body 18 and which may be displaced relatively to the container main body 18. Either of the container main body 18 or the movable member 20 is connected to one crushing arm 15 so that the storage room S2 is extended and shrunk in a depending manner on closing or apart of the crushing arms 15 and the other one of the container main body 18 and movable member is connected to the other one of the crushing arms 15.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a hydraulic drive device for a construction machine including a crusher having a pair of crushing arms.

  2. Description of the Related Art Conventionally, a construction machine including an airframe, a work arm having a base end portion attached to the airframe, and a crusher attached to a distal end portion of the work arm is known.

  The crushing machine rotates the crushing arm so that the crushing machine main body attached to the working arm, the pair of crushing arms attached to the crushing machine main body so as to be rotatable, and both the crushing arms are close to and away from each other. A drive cylinder.

  In the drive cylinder, hydraulic oil discharged from a hydraulic pump provided in the machine body is supplied through a pipe provided in the work arm, and hydraulic oil derived from the drive cylinder is supplied to the machine body through a pipe provided in the work arm. It operates by being guided to the tank provided.

  Since hydraulic oil is exchanged between the drive cylinder and the hydraulic pump and tank through the pipe provided on the work arm in this way, the power loss of the construction machine increases due to the pressure loss of the hydraulic oil generated in the pipe. There is a problem.

  Therefore, for example, the crusher described in Patent Document 1 stores the hydraulic oil derived from the head side chamber of the drive cylinder when the drive cylinder is reduced, while the stored hydraulic oil is stored in the drive cylinder when the drive cylinder is extended. An accumulator for supplying to the head side chamber is provided.

  According to this crusher, when the crushing arm is opened (when the drive cylinder is contracted), the hydraulic oil derived from the drive cylinder is guided to the accumulator, so that the hydraulic oil is guided to the tank through the pipe provided in the work arm. Can be reduced.

  Furthermore, when the crushing arm is closed (when the drive cylinder is extended), the hydraulic oil stored in the accumulator is supplied to the drive cylinder, so that the hydraulic pump supplies the drive cylinder through the piping provided on the work arm. Oil can be reduced.

JP 2010-242435 A

  In the crusher described in Patent Document 1, the hydraulic oil is stored in the accumulator while accumulating the biasing force, and the stored hydraulic fluid is used to reduce the power loss of the construction machine. As shown, the power of the hydraulic pump is used to store the urging force of the accumulator.

  Here, since the urging force of the accumulator increases as the amount of hydraulic fluid to be stored increases, there is a problem that the power consumption of the hydraulic pump increases in order to store a sufficient amount of hydraulic fluid in the accumulator. .

  In particular, an accumulator that uses an urging force stored by compression of the gas chamber has a characteristic that the pressure in the gas chamber increases rapidly as the amount of stored hydraulic oil increases, so that a sufficient amount of hydraulic fluid is stored in the accumulator. The power of the hydraulic pump for housing the water becomes very large.

  The objective of this invention is providing the crusher which has a storage container which can reduce efficiently the power loss at the time of supplying and exhausting hydraulic fluid to a drive cylinder, and a hydraulic drive device provided with the same.

  In order to solve the above-mentioned problem, the present invention is a crusher attached to a distal end portion of the work arm in a construction machine having a machine body and a work arm having a base end part attached to the machine body, the work arm A crusher body attached to the crusher body, a first crushing arm provided in the crusher body, a second crushing arm provided so as to be rotatable with respect to the crusher body, and the second crushing by its extension operation The second crushing arm is moved so that the tip of the arm is close to the tip of the first crushing arm and the tip of the second crushing arm is separated from the tip of the first crushing arm by the reduction operation thereof. A drive cylinder that rotates, a storage chamber that stores hydraulic oil from the drive cylinder, and a storage container that can lead out the hydraulic oil in the storage chamber as the storage chamber shrinks, and the storage The container has a container main body and a movable member that forms the storage chamber between the container main body and is relatively displaceable with respect to the container main body, and the first with respect to the first crushing arm One of the container body and the movable member is connected to the second crushing arm, and the container body and the movable member so that the storage chamber expands and contracts according to the proximity and separation of the crushing arm. Is connected to at least one of the first crushing arm and the crusher body, and the storage chamber of the storage container expands when the storage chamber is reduced among the head side chamber and the rod side chamber of the drive cylinder, and There is provided a crusher connected to a chamber that is reduced when the storage chamber is expanded.

  According to the present invention, one of the container main body and the movable member, which are separate members forming the storage chamber, is connected to the second crushing arm and the other is connected to at least one of the first crushing arm and the crusher main body. ing. Thereby, since the storage chamber can be expanded and contracted using the power generated by the rotation of the second crushing arm, hydraulic oil can be stored in the storage chamber according to the expansion of the storage chamber and the storage chamber can be reduced. Accordingly, the hydraulic oil stored in the storage chamber can be derived.

  Thus, according to the present invention, unlike conventional accumulators that store hydraulic oil while accumulating the urging force and derive hydraulic oil using the stored urging force, the power of the drive cylinder can be increased without accumulating the urging force. The hydraulic oil derived from the drive cylinder can be accommodated, and the accommodated hydraulic oil can be derived.

  Further, since the storage chamber is connected to a chamber of the head side chamber and the rod side chamber of the drive cylinder that expands when the storage chamber is contracted and contracts when the storage chamber is expanded, the drive cylinder responds to the rotation of the second crushing arm. By exchanging the hydraulic oil between the storage chamber and the storage chamber, the amount of the hydraulic oil flowing back and forth between the machine body and the crusher can be reduced through piping provided on the work arm.

  Therefore, according to the present invention, it is possible to efficiently reduce power loss when supplying and discharging hydraulic oil to and from the drive cylinder.

  Specifically, in the crusher, the container body is formed in a cylindrical shape having a bottom portion, the movable member is provided so as to be opposed to the bottom portion and slidable in the container body, It is preferable that an extension member that extends through the bottom portion and extends from the movable member to the outside of the storage chamber is further provided.

  According to this aspect, the storage container is formed in a cylindrical shape having a cylindrical container body, a movable member slidable in the container body, and an extending member extending from the movable member to the outside of the container body. .

  Therefore, by connecting one of the container main body and the extending member to the second crushing arm and connecting the other to at least one of the first crushing arm and the crushing machine main body, it is possible to efficiently use the power from the second crushing arm. The storage chamber can be expanded and reduced.

  Here, in the cylindrical storage container having the extending member that extends from the movable member through the bottom of the container main body to the outside of the container main body as described above, a part of the extending member exists in the storage chamber. The volume of the storage chamber is restricted by the extending member.

  Therefore, in the crusher, the container main body is formed in a cylindrical shape having a bottom portion, the movable member is provided slidably in the container main body while facing the bottom portion, It is preferable to further include an extending member that extends from the movable member to the outside of the container body toward the side opposite to the bottom.

  According to this aspect, the extending member extends from the movable member to the side opposite to the bottom, that is, to the outside of the container main body without passing through the containing chamber. Therefore, the volume of the storage chamber can be increased as compared with the storage container having the extending member that penetrates the bottom of the container main body as described above, and the storage container having the storage chamber of the required volume is relatively used. Miniaturization can be achieved.

  Here, the storage container expands (when the tip of the second crushing arm is close to the tip of the first crushing arm) when the crushing cylinder is extended, and the storage container is reduced so that the storage chamber is reduced when the crushing cylinder is reduced. It may be attached. However, in this case, the hydraulic oil cannot be stored in the storage container when the crushing cylinder is reduced so that a large amount of the hydraulic oil is led out from the head side chamber from the crushing cylinder.

  Therefore, in the crusher, the storage chamber is reduced in accordance with the proximity of the tip of the second crushing arm to the tip of the first crushing arm, and the second crushing arm with respect to the tip of the first crushing arm. One of the container body and the movable member is connected to the second crushing arm, and the other of the container body and the movable member is It is preferable that the container is connected to at least one of the first crushing arm and the crusher body, and the storage chamber of the storage container is connected to a head side chamber of the drive cylinder.

  According to this aspect, since the hydraulic oil can be stored in the storage container when the crushing cylinder from which a large amount of hydraulic oil is derived is reduced, power loss can be reduced more effectively.

  Specifically, in the crusher having an extending member that extends from the movable member to the outside of the container main body through the bottom of the container main body, the first crushing arm is provided to be rotatable with respect to the crusher main body. In the crusher, the distal end portion of the first crushing arm comes close to the distal end portion of the second crushing arm due to the extension operation, and the distal end portion of the first crushing arm is brought into contact with the second crushing arm due to the reduction operation. A rotation cylinder for rotating the first crushing arm so as to be separated from the tip of the storage container, wherein the storage chamber of the storage container is an operation derived from the drive cylinder and the head side chamber of the rotation cylinder One of the container main body and the extending member is connected to the second crushing arm, and is connected to a head side chamber of the driving cylinder and the rotating cylinder so as to be able to contain oil. And the other of the container main body and the extending member is connected to a portion of the first crushing arm on the proximal side of the rotation center. It is preferable.

  According to this aspect, the storage container is provided over a portion of the second crushing arm on the proximal end side with respect to the rotation center and a portion of the first crushing arm on the proximal end side with respect to the rotation center. . Here, the portion of the both arms that is closer to the proximal end than the center of rotation operates in the opposite direction to the distal ends of the arms, so that when the distal ends of the arms approach each other, the proximal ends of the arms Are separated from each other.

  Therefore, according to the said aspect, a storage chamber expands when the front-end | tip part of both arms spaces apart (when a drive cylinder and a rotation cylinder shrink | contract), and a storage chamber shrink | contracts when both arms operate | move in the reverse direction. .

  As a result, the hydraulic oil derived from the head side chambers of the drive cylinder and the rotating cylinder is stored in the storage container when the distal ends of both arms are separated from each other, and the hydraulic fluid is operated when the distal ends of both arms are close to each other. Oil can be derived.

  Moreover, according to the above aspect, since the storage container is provided on the base end side with respect to the rotation center of both arms, the storage container is located at a position on the base end side that does not interfere with the work performed by the distal end portions of both arms. Can be arranged. Thereby, workability | operativity using the crusher is also improved.

  Further, in the crusher having an extending member extending from the movable member to the outside of the container main body toward the side opposite to the bottom portion, the first crushing arm is provided to be rotatable with respect to the crusher main body. In the crusher, the distal end portion of the first crushing arm is brought close to the distal end portion of the second crushing arm by the extension operation, and the distal end portion of the first crushing arm is moved by the reduction operation. A rotation cylinder for rotating the first crushing arm so as to be separated from the tip end portion is further provided, and the storage chamber of the storage container is hydraulic oil derived from the drive cylinder and a head side chamber of the rotation cylinder. Is connected to the head side chamber of the drive cylinder and the rotation cylinder so that one of the container body and the extension member is connected to the first crushing arm. A portion closer to the base end than the center of rotation and a portion closer to the base end than the center of rotation of the second crushing arm via a link mechanism, respectively, and the container body and the extending member The other of the two is connected to a portion of the crusher body that is closer to the base end side than the both rotation centers, and the link mechanism has a force in a direction in which the base end portions of the arms are close to each other. Preferably, the force is converted into a force extending in the direction extending from the container body, and the force in the direction in which the base ends of the two arms are separated from each other is converted into a force in a direction in which the extending member contracts with respect to the container body. .

  According to this aspect, the storage container is provided across both arms and the crusher body, and the link mechanism is interposed between the storage container and both arms. Here, the portion of the both arms that is closer to the proximal end than the center of rotation operates in the opposite direction to the distal ends of the arms, so that when the distal ends of the arms approach each other, the proximal ends of the arms Are separated from each other.

  Therefore, when the base ends of both arms are close to each other (when the drive cylinder and the rotation cylinder are contracted), the extending member is extended to expand the storage chamber, and when the base ends of both arms are close to each other (the drive cylinder and the rotation cylinder). When the moving cylinder expands), the extension member contracts and the storage chamber shrinks.

  As a result, the hydraulic oil derived from the head side chambers of the drive cylinder and the rotating cylinder is stored in the storage container when the distal ends of both arms are separated from each other, and the hydraulic fluid is operated when the distal ends of both arms are close to each other. Oil can be derived.

  Moreover, according to the above aspect, since the storage container is provided on the base end side with respect to the rotation center of both arms, the storage container is located at a position on the base end side that does not interfere with the work performed by the distal end portions of both arms. Can be arranged. Thereby, workability | operativity using the crusher is also improved.

  The present invention also provides the crusher, a hydraulic pump that is provided in the fuselage and supplies hydraulic oil to the drive cylinder, and a control valve that is provided in the fuselage and controls supply and discharge of hydraulic oil to and from the drive cylinder. And the storage chamber of the storage container is connected to a chamber that is expanded when the storage chamber is contracted and is contracted when the storage chamber is expanded, among the head side chamber and the rod side chamber of the drive cylinder. Providing the device.

  According to the present invention, the hydraulic oil derived from the head side chamber or the rod side chamber of the drive cylinder can be stored in the storage container according to the expansion of the storage chamber, and the stored hydraulic oil is supplied to the head side chamber or the rod side chamber. can do. Thereby, the flow volume of the hydraulic fluid which flows through the inside of piping provided in the work arm can be reduced.

  Thus, according to the present invention, unlike conventional accumulators that store hydraulic oil while accumulating urging force and derive hydraulic oil using the stored urging force, the hydraulic oil is accommodated using the power of the drive cylinder. Therefore, the hydraulic oil can be efficiently exchanged between the drive cylinder and the storage chamber.

  Therefore, according to the present invention, it is possible to efficiently reduce the amount of hydraulic oil passing through the piping provided on the work arm, that is, the power loss of the construction machine.

  Furthermore, the present invention provides the crusher, a hydraulic pump that is provided in the machine body and supplies hydraulic oil to the drive cylinder, and a control valve that is provided in the machine body and controls supply and discharge of hydraulic oil to and from the drive cylinder. And a storage chamber of the storage container is connected to a head side chamber of the drive cylinder.

  According to the present invention, when the drive cylinder is reduced, the hydraulic oil led out from the head side chamber of the drive cylinder can be stored in the storage container, and the stored hydraulic oil can be supplied to the head side chamber. As described above, since the hydraulic oil can be exchanged between the head side chamber that draws a larger amount of hydraulic oil than the rod side chamber and the storage chamber, the flow rate of the hydraulic oil flowing in the piping provided in the work arm is effective. Can be reduced.

  Thus, according to the present invention, unlike conventional accumulators that store hydraulic oil while accumulating urging force and derive hydraulic oil using the stored urging force, the hydraulic oil is accommodated using the power of the drive cylinder. Therefore, the hydraulic oil can be efficiently exchanged between the drive cylinder and the storage chamber.

  Therefore, according to the present invention, it is possible to efficiently reduce the amount of hydraulic oil passing through the piping provided on the work arm, that is, the power loss of the construction machine.

  In the hydraulic drive device, the crusher connects a rod side passage connecting the control valve and a rod side chamber of the drive cylinder, and a head side passage connecting the control valve and a head side chamber of the drive cylinder. It is preferable to further include a first regeneration valve that is provided in the first regeneration passage and permits the flow of hydraulic oil from the rod side passage toward the head side passage while restricting the flow in the opposite direction.

  According to this aspect, since the hydraulic oil derived from the rod side chamber of the drive cylinder can be supplied to the head side chamber in addition to the hydraulic oil derived from the storage container when the drive cylinder is extended, the drive cylinder is accelerated. be able to.

  Here, when the hydraulic oil from the container and the rod side chamber is regenerated with respect to the head side chamber of the drive cylinder as described above, the pressure in the rod side chamber of the drive cylinder rises. Is constrained by a certain size.

  Therefore, in the hydraulic drive device, the crusher is provided in the rod-side passage, and when the pressure in the head-side passage is less than a preset regeneration cut pressure, the rod-side passage to the control valve. Regenerative cut means that restricts the flow of hydraulic oil toward the control valve while permitting the flow of hydraulic oil from the rod side passage toward the control valve when the pressure in the head side passage is equal to or higher than the regeneration cut pressure. It is preferable to provide.

  According to this aspect, when the pressure in the head side passage becomes equal to or higher than the regeneration cut pressure, the flow of hydraulic oil from the rod side passage to the control valve (tank connected thereto) is allowed, and the rod side chamber and the head side chamber are allowed to flow. The regeneration of hydraulic oil to the front is cut.

  As a result, the pressure in the rod side chamber of the drive cylinder can be reduced in a situation where a large thrust is required for the drive cylinder, and therefore the thrust of the drive cylinder can be increased.

  Here, the supply of the hydraulic oil led out from the container to the head side passage may be continued even during the regeneration cut. However, in this case, since a part of the thrust of the drive cylinder is used to push the hydraulic oil from the storage container to the head side chamber of the drive cylinder, it is difficult to further increase the thrust of the drive cylinder.

  Therefore, in the hydraulic drive device, the crusher is provided in a storage passage for connecting the head side chamber and the storage chamber, and the pressure in the head side passage is previously set as a pressure equal to or lower than the regeneration cut pressure. When the pressure is less than the set pressure, the flow of hydraulic oil through the storage passage is allowed, while when the pressure in the head side passage is equal to or higher than the set pressure, the hydraulic oil flows through the storage passage. Provided in a second regeneration passage that connects the rod side passage with a portion of the storage passage between the high pressure restriction means and the storage chamber, and the rod side passage. It is preferable to further include a second regeneration valve that allows the flow of hydraulic oil toward the passage while restricting the flow in the opposite direction.

  According to this aspect, when the pressure in the head side passage is less than the set pressure when the drive cylinder is extended, the hydraulic oil can be guided from the storage container to the head side passage via the high pressure regulating means, and the rod side passage The hydraulic oil is regenerated from the head to the head side passage.

  When the pressure in the head side passage becomes equal to or higher than the set pressure, the flow of hydraulic oil through the storage passage is restricted by the high pressure restricting means, whereby the storage container is blocked from the head side passage and led out from the storage container. The hydraulic oil is introduced to the rod side passage through the second regeneration valve.

  When the pressure in the head side passage becomes equal to or higher than the regeneration cut pressure, the regeneration cut means allows the flow from the rod side passage to the control valve (tank). The hydraulic oil led out from the side chamber can be led to the control valve (tank).

  Therefore, by reducing the pressure in the storage chamber of the storage container at the time of regeneration cut, it is possible to reduce the thrust of the drive cylinder used to push out the hydraulic oil from the storage container. Therefore, the thrust of the drive cylinder can be further increased compared to the case where the hydraulic oil led out from the storage container is supplied to the head side passage even during the regeneration cut.

  On the other hand, when the drive cylinder is reduced, the pressure in the head-side passage is less than the set pressure, so that the hydraulic oil is introduced from the head-side chamber of the drive cylinder to the storage container via the high-pressure shut-off means. Can be stored in a container. That is, the “set pressure” is set higher than the pressure in the head side passage when the drive cylinder is reduced.

  According to the present invention, it is possible to efficiently reduce power loss when supplying and discharging hydraulic oil to and from the drive cylinder.

It is a side view which shows the whole structure of the demolition machine which has the crusher which concerns on 1st Embodiment of this invention. It is a front view which expands and shows the crusher of FIG. 1, and shows the state which a pair of crushing arm opened. It is a front view which expands and shows the crusher of FIG. 1, and shows the state which a pair of crushing arm closed. It is sectional drawing which expands and shows the storage container of FIG. It is a circuit diagram of the hydraulic circuit provided in the construction machine of FIG. It is a circuit diagram for demonstrating operation | movement of the hydraulic circuit of FIG. 5, and shows the state at the time of opening operation | movement of a pair of crushing arm. It is a circuit diagram for demonstrating operation | movement of the hydraulic circuit of FIG. 5, and shows the state at the time of closing operation of a pair of crushing arms. FIG. 6 is a circuit diagram for explaining the operation of the hydraulic circuit of FIG. 5, and shows a state in which a regeneration cut pressure is generated in the head side passage during the closing operation of the pair of crushing arms. It is a front view which shows the crusher which concerns on 2nd Embodiment of this invention. It is a front view which shows the crusher which concerns on 3rd Embodiment of this invention, and shows the state which a pair of crushing arm opened. It is a front view which shows the crusher of FIG. 10, and shows the state which a pair of crushing arm closed. It is sectional drawing which shows the storage container provided in the crusher of FIG. It is a circuit diagram of the hydraulic circuit for driving the crusher of FIG. It is a front view which shows the crusher which concerns on 4th Embodiment of this invention.

  Embodiments of the present invention will be described below with reference to the accompanying drawings. The following embodiments are examples embodying the present invention, and are not of a nature that limits the technical scope of the present invention.

<First Embodiment (FIGS. 1 to 8)>
Referring to FIG. 1, a demolition machine 1 as an example of a construction machine according to a first embodiment of the present invention includes a lower traveling body 2 having a crawler 2a, and an upper portion provided on the lower traveling body 2 so as to be able to turn. A revolving structure 3 and an attachment 4 attached to the upper revolving structure 3 are provided.

  The attachment 4 includes a main boom 6 having a base end portion rotatably attached to the upper swing body 3 and an interface having a base end portion rotatably attached to the distal end portion of the main boom 6. A boom 7, an arm 8 that is rotatably attached to the distal end portion of the inter boom 7, and a crusher 9 that is rotatably attached to the distal end portion of the arm 8 are provided.

  Further, the attachment 4 has a main boom cylinder 10 that rotates the main boom 6 relative to the upper swing body 3, an inter boom cylinder 11 that rotates the inter boom 7 relative to the main boom 6, and the inter boom 7. The arm cylinder 12 that rotates the arm 8 and the crusher cylinder 13 that rotates the crusher 9 relative to the arm 8 are provided.

  The lower traveling body 2 and the upper swing body 3 correspond to the body, and the main boom 6, the inter boom 7 and the arm 8 correspond to a work arm having a base end attached to the body.

  With reference to FIG. 2, the crusher 9 includes a crusher body 14 attached to the tip of the arm 8, a pair of crushing arms 15 provided to be rotatable with respect to the crusher body 14, and each crusher. A pair of crushing cylinders (driving cylinder and rotating cylinder) 16 for rotating the arm 15 and a container 17 capable of taking in and out the hydraulic oil according to the rotation of the crushing arm 15 are provided.

  The crusher main body 14 is attached to the distal end portion of the arm 8 in a detachable manner, a cylinder attachment portion 14b provided at the distal end portion of the attached portion 14a, and extends from the cylinder attachment portion 14b to the distal end side. Arm support portion 14c. The attached portion 14a is attached to the distal end portion of the arm 8 so as to be rotatable about a horizontal axis (an axis extending in a direction orthogonal to the paper surface of FIG. 2). The cylinder mounting portion 14b supports the base end portion (the end portion on the rod side) of the crushing cylinder 16 so as to be rotatable about an axis J1 parallel to the horizontal axis. The arm support portion 14c supports the crushing arms 15 in a state of being rotatable about axes J2 and J3 parallel to the axis J1. The axes J2 and J3 are provided at positions on the tip side of the axis J1.

  The pair of crushing arms 15 includes a support portion supported by axes J2 and J3, a distal end portion disposed on the distal end side with respect to the support portion, and a proximal end portion disposed on the proximal end side with respect to the support portion. Have. One of the crushing arms 15 corresponds to the first crushing arm, and the other corresponds to the second crushing arm.

  Each crushing cylinder 16 has its tip end portion close to the tip end portion of the other crushing arm 15 by its extension operation (see FIG. 3) and one crushing arm by its reduction operation (see FIG. 2). One crushing arm 15 is rotated so that the tip of 15 is separated from the tip of the other crushing arm 15. Specifically, the distal end portion (the end portion on the head side) of the crushing cylinder 16 is attached to the base end portion of the crushing arm 15 so as to be rotatable about an axis J4 parallel to the axis J1.

  Referring to FIG. 4, the storage container 17 has a storage chamber S2 that stores the hydraulic oil from the crushing cylinder 16, and can discharge the hydraulic oil in the storage chamber S2 as the storage chamber S2 is reduced. Specifically, the storage container 17 forms a storage chamber S <b> 2 between the container main body 18 and the container main body 18 and is attached to the container main body 18 so as to be relatively displaceable. And an extending member 20 that extends.

  The container body 18 includes a cylindrical peripheral wall portion, a bottom portion that closes one opening of the peripheral wall portion (right side opening in FIG. 4), and a lid portion that closes the other opening (left side opening in FIG. 4) of the peripheral wall portion. Have. A communication portion 18a connected to the inside and the outside of the peripheral wall portion is formed at an end portion on the bottom side of the peripheral wall portion. On the other hand, an open portion 18b connected to the inside and the outside of the peripheral wall portion is formed at the end of the peripheral wall portion on the lid portion side.

  The movable member 19 is slidably provided in the container body 18 while facing the bottom of the container body 18. Specifically, the movable member 19 is slidably provided in the peripheral wall portion in contact with the inner surface so as to regulate the flow of the hydraulic oil between the inner surface of the peripheral wall portion of the container body 18. Thereby, in the container main body 18, a storage chamber S <b> 2 for storing hydraulic oil is formed between the movable member 19 and the bottom portion, and the open portion 18 b is provided between the movable member 19 and the lid portion. An open chamber S1 that is open to atmospheric pressure is formed.

  The extending member 20 extends through the bottom of the container body 18 from the movable member 19 to the outside of the storage chamber S2. Specifically, the extending member 20 is in contact with the inner surface of the through hole in the bottom so as to regulate the flow of the hydraulic oil between the extending portion 20 and the bottom of the container body 18 and is slidable with respect to the bottom. It penetrates the bottom.

  As shown in FIGS. 2 to 4, the storage chamber 17 is expanded in response to the proximal ends of the crushing arms 15 approaching each other, and the proximal ends of the crushing arms 15 are connected to each other. It is provided over both crushing arms 15 so that the accommodation chamber S2 is reduced in accordance with the separation. Specifically, the end portion of the container body 18 is rotatable with respect to one crushing arm 15 (right crushing arm 15) about an axis J5 parallel to the axis J1. It is attached to the base end. Further, the end portion of the extending member 20 is a base end of the other crushing arm 15 in a state of being rotatable about an axis J6 parallel to the axis J1 with respect to the other crushing arm 15 (left crushing arm). It is attached to the part.

  Accordingly, as shown in FIG. 2, when the two crushing cylinders 16 are contracted and the front ends of the two crushing arms 15 are separated from each other, the storage chamber S <b> 2 in the storage container 17 is expanded. The hydraulic fluid to be stored can be stored in the storage chamber S2. On the other hand, as shown in FIG. 3, when both crushing cylinders 16 are extended and the front ends of both crushing arms 15 are close to each other, the storage chamber S2 in the storage container 17 is reduced, so that the hydraulic oil derived from the storage chamber S2 Can be supplied to the head side chambers of both crushing cylinders 16.

  Hereinafter, in order to explain this point, the configuration of the hydraulic circuit 5 provided in the dismantling machine 1 will be described with reference to FIG.

  The hydraulic circuit 5 is provided in the upper swing body 3 (machine body), and is provided in the upper swing body 3 (machine body) that supplies hydraulic oil to both the crushing cylinders 16. And a control valve 22 for controlling the supply and discharge of the hydraulic oil to and from.

  The control valve 22 supplies the hydraulic oil from the hydraulic pump 21 to the head side chamber of the crushing cylinder 16 and the return oil from the rod side chamber while stopping the supply and discharge of the hydraulic oil from the hydraulic pump 21 to the crushing cylinder 16. Position to the tank (right side position in the figure), and open position to supply hydraulic oil from the hydraulic pump 21 to the rod side of the crushing cylinder 16 and lead return oil from the head side chamber to the tank (left side position in the figure) And can be switched between. The control valve 22 is a pilot-type switching valve that is biased to a neutral position when an operation lever (not shown) is not operated and is switched to a closed position and an open position by operating the operation lever.

  The hydraulic pump 21 and the control valve 22 are provided in the upper swing body 3 (see FIG. 1). The head-side passage R1 that connects the control valve 22 and the head-side chamber of the crushing cylinder 16 and the rod-side passage R2 that connects the control valve 22 and the rod-side chamber of the crushing cylinder 16 are connected to the upper swing body 3 (control valve). 22) to the crusher 9 (crushing cylinder 16) via the main boom 6, the inter boom 7, and the arm 8 (that is, the working arm). As described above, since the portions extending outside the crusher 9 in the head side passage R1 and the rod side passage R2 are long distances, pressure loss occurs in the hydraulic oil passing through these portions, and as a result, the power of the dismantling machine 1 Loss increases.

  Therefore, the storage chamber S2 of the storage container 17 is connected to the head side chamber so that the hydraulic oil derived from the head side chamber of the crushing cylinder 16 can be stored and the stored hydraulic oil can be supplied to the head side chamber. . Specifically, the communication portion 18a (accommodating chamber S2) of the accommodating container 17 is connected to the head side chamber of the crushing cylinder 16 via the storage passage R3 and the head side passage R1. That is, the storage passage R3 is for connecting the head side chamber of the crushing cylinder 16 and the communication portion 18a (the storage chamber S2). Thereby, as shown in FIG. 6, when the leading ends of the crushing arms 15 are separated from each other (when the crushing cylinder 16 is contracted), the operation is derived from the head side chamber of the crushing cylinder 16 by the expansion of the storage chamber S2. Oil can be stored in the storage container 17. Furthermore, as shown in FIG. 7, when the distal ends of the crushing arms 15 are close to each other (when the crushing cylinder 16 is extended), the hydraulic oil stored in the storage container 17 is reduced by reducing the storage chamber S <b> 2. 16 head side chambers can be supplied. As a result, the flow rate of the hydraulic oil exchanged between the crusher 9 and the upper swing body 3 through the head side passage R1 and the rod side passage R2 can be reduced.

  Specifically, as shown in FIG. 5, the hydraulic circuit (crusher 9) 5 includes a first regeneration valve 24 provided in a first regeneration passage R4 that connects the head-side passage R1 and the rod-side passage R2, and A regeneration cut valve (regeneration cut means) 26 provided in the rod side passage R2 and a high pressure restriction valve (high pressure restriction means) provided in the storage passage R3 connecting the head side passage R1 and the communication portion 18a of the storage container 17. ) 23 and the second regeneration valve 25 provided in the second regeneration passage R5 that connects the portion between the high pressure regulating valve 23 of the storage passage R3 and the communication portion 18a (the storage chamber S2) and the rod side passage R2. And have.

  The first regeneration valve 24 allows the flow of hydraulic oil from the rod side passage R2 toward the head side passage R1, while restricting the flow in the opposite direction. As shown by the filled arrows in FIG. 7, when the crushing arm 15 is closed (when the crushing cylinder 16 is extended), the hydraulic oil led out from the rod side chamber of the crushing cylinder 16 is passed through the first regeneration valve 24 to the head side passage. By regenerating to R1, the crushing cylinder 16 can be accelerated. The first regeneration valve 24 is urged in the closing direction by using the pressure in the rod side passage R2 when the crushing cylinder 16 is reduced as the pilot pressure. Thus, the first regeneration valve 24 restricts the flow of hydraulic oil from the rod side passage R2 to the head side passage R1 when the crushing cylinder 16 is reduced.

  The regeneration cut valve 26 is urged to the regeneration position (left side in FIG. 7) when the pressure in the head side passage R1 is less than a preset regeneration cut pressure, and the pressure in the head side passage R1 is regenerated. This is a hydraulic pilot type switching valve that is switched to the regeneration cut position (the right position in FIG. 7) when the pressure is higher than the pressure. The regeneration cut valve 26 in the regeneration position allows the flow of hydraulic oil from the control valve 22 toward the rod side passage R2, while restricting the flow of hydraulic oil from the rod side passage R2 toward the control valve 22. When the crushing cylinder 16 extends in a state where the regeneration cut valve 26 is biased to the regeneration position, the hydraulic oil is regenerated from the rod side passage R2 to the head side passage R1 as described above. On the other hand, the regeneration cut valve 26 at the regeneration cut position allows the flow of hydraulic oil from the rod side passage R2 toward the control valve 22 (and the tank connected thereto) as shown in FIG. By switching the regeneration cut valve 26 to the regeneration cut position, regeneration of the hydraulic oil from the rod side passage R2 to the head side passage R1 is stopped.

  Referring to FIG. 5, the high pressure regulating valve 23 is attached to the permissible position (the right position in FIG. 5) when the pressure in the head side passage R1 is less than a preset pressure set as a pressure equal to or lower than the regeneration cut pressure. This is a hydraulic pilot type switching valve that is energized and that is switched to the restriction position (left side position in FIG. 5) when the pressure in the head side passage R1 is equal to or higher than the set pressure. The set pressure is set higher than the pressure in the head side passage R1 when the crushing cylinder 16 is reduced.

  The high-pressure regulating valve 23 at the permissible position allows the hydraulic oil to flow through the storage passage R3 between the head side passage R1 and the communication portion 18a. As shown in FIG. 6, when the crushing cylinder 16 is reduced, the pressure in the head-side passage R1 becomes less than the set pressure, so that the high-pressure regulating valve 23 is maintained at the allowable position. Therefore, the hydraulic oil led out from the head side chamber of the crushing cylinder 16 is stored in the storage container 17 through the high pressure regulating valve 23. Further, even when the crushing cylinder 16 is extended and the pressure in the head-side passage R1 is less than the set pressure, the high-pressure regulating valve 23 is maintained at the permissible position, and the hydraulic oil led out from the storage container 17 is pressurized. It can be supplied to the head side chamber of the crushing cylinder 16 through the restriction valve 23.

  On the other hand, the high-pressure regulating valve 23 in the regulating position regulates the flow of hydraulic oil through the storage passage R3 between the head side passage R1 and the communication portion 18a of the storage container 17. As shown in FIG. 7, when the pressure in the head side passage R1 becomes equal to or higher than the set pressure when the crushing cylinder 16 is extended, the high pressure regulating valve 23 is switched to the regulating position. In this state, the hydraulic oil led out from the storage container 17 is guided to the rod side passage R2 through the second regeneration passage R5 and the second regeneration valve 25. Here, the second regeneration valve 25 allows the flow of hydraulic oil from the communication portion 18a (the storage chamber S2) of the storage container 17 toward the rod side passage R2, while restricting the flow in the opposite direction. Then, as shown by the filled arrows in FIG. 7, when the pressure in the head side passage R <b> 1 becomes equal to or higher than the regeneration cut pressure when the crushing cylinder 16 is extended, the hydraulic oil led out from the storage container 17 causes the second regeneration valve 25 to flow. To the rod side passage R2 and to the tank via the regeneration cut valve 26.

  Hereinafter, the operation of the hydraulic circuit 5 will be described with reference to FIGS. 6 to 8, white arrows indicate the flow of hydraulic oil from the hydraulic pump 21 toward the crushing cylinder 16, and solid arrows indicate the flow of hydraulic oil (return oil) derived from the crushing cylinder 16. .

  First, as shown in FIG. 6, when the control valve 22 is switched to the open position, the hydraulic oil from the hydraulic pump 21 is guided to the rod side chamber of the crushing cylinder 16 and the hydraulic oil is led out from the head side chamber of the crushing cylinder 16. Then, the crushing cylinder 16 is reduced. As a result, the base ends of the crushing arms 15 are close to each other (see FIG. 2), and the receiving container 17 is reduced accordingly. Further, the high pressure regulating valve 23 is maintained at the allowable position. Therefore, the hydraulic oil led out from the crushing cylinder 16 is stored in the storage chamber S2 of the storage container 17 through the head side passage R1 and the storage passage R3. In this state, since the first regeneration valve 24 is maintained in the closed position by the pressure in the rod side passage R2, the flow of hydraulic oil from the rod side passage R2 to the head side passage R1 is restricted. .

  As shown in FIG. 7, when the control valve 22 is switched to the closed position, the hydraulic oil from the hydraulic pump 21 is led to the head side chamber of the crushing cylinder 16 and the hydraulic oil is led out from the rod side chamber of the crushing cylinder 16. The crushing cylinder 16 extends. As a result, the base ends of the crushing arms 15 are separated from each other (see FIG. 3), and the receiving container 17 extends accordingly. Here, in a state where the pressure in the head side passage R1 is less than the set pressure set in the high pressure regulating valve 23, the high pressure regulating valve 23 is maintained at the allowable position, but the container 17 is not shown. Is supplied to the head side chamber of the crushing cylinder 16 through the high pressure regulating valve 23. In this state, the hydraulic oil is also supplied to the rod side passage R2 through the second regeneration valve 25 and guided to the head side passage R1 through the first regeneration valve 24. That is, the hydraulic oil led out from the storage container 17 is guided to the head side passage R1 through the high pressure regulating valve 23 and the second regeneration valve. Further, when the pressure in the head side passage R1 becomes equal to or higher than the set pressure, the high pressure restriction valve 23 is switched to the restriction position as shown in FIG. In this state, the hydraulic oil derived from the storage container 17 is guided to the rod side passage R2 via the second regeneration valve 25, and together with the hydraulic oil derived from the rod side passage of the crushing cylinder 16, the first regeneration valve 24. Through the head side passage R1, that is, the head side chamber of the crushing cylinder 16.

  Here, in a situation where a thrust is required for the crushing cylinder 16, for example, a situation where rubble sandwiched between the tips of both crushing arms 15 is destroyed, the pressure in the head side passage R <b> 1 increases. When this pressure becomes equal to or higher than the regeneration cut pressure of the regeneration cut valve 26, the regeneration cut position is switched as shown in FIG. As a result, the hydraulic oil derived from the storage container 17 and the hydraulic oil derived from the rod side chamber of the crushing cylinder 16 are guided to the tank through the regeneration cut valve 26. Therefore, it is possible to reduce the pressure in the rod side passage R2 and reduce the thrust of the crushing cylinder 16 used to push out the hydraulic oil from the storage container 17. Therefore, the thrust required for the crushing cylinder 16 can be ensured.

  As described above, in the container main body 18 and the movable member 19 which are separate members forming the storage chamber S2, the container main body 18 is connected to one crushing arm 15, and the movable member 19 is the other crushing arm. 15 is connected. Thereby, since the storage chamber S2 can be expanded and contracted using the power generated by the rotation of the crushing arm 15, hydraulic oil can be stored in the storage chamber S2 according to the expansion of the storage chamber S2. The hydraulic oil stored in the storage chamber S2 can be derived according to the reduction of the storage chamber S2.

  Specifically, the hydraulic fluid led out from the head side chamber of the crushing cylinder 16 according to the expansion of the storage chamber S2 can be stored in the storage container 17, and the stored hydraulic oil can be supplied to the head side chamber. As described above, since the hydraulic oil can be exchanged between the head side chamber that draws a larger amount of hydraulic oil than the rod side chamber and the storage chamber, the flow rate of the hydraulic oil flowing in the piping provided in the work arm is effective. Can be reduced.

  In this way, unlike conventional accumulators that store hydraulic oil while accumulating the urging force and derive hydraulic oil using the accumulated urging force, the crushing cylinder uses the power of the crushing cylinder 16 without accumulating the urging force. The hydraulic fluid derived | led-out from 16 can be accommodated, and the accommodated hydraulic fluid can be derived | led-out.

  Therefore, the operation derived from the crushing cylinder 16 in order to reduce the amount of hydraulic oil passing through the piping provided in the work arms (main boom 6, inter boom 7 and arm 8), that is, the power loss of the dismantling machine 1. Oil can be efficiently stored and taken out in the storage container 17.

  Moreover, according to 1st Embodiment, there can exist the following effects.

  The storage container 17 is formed in a cylindrical shape having a cylindrical container body 18, a movable member 19 slidable in the container body 18, and an extending member 20 extending from the movable member 19 to the outside of the container body 18. Yes.

  Therefore, the container main body 18 is connected to one crushing arm 15 and the extension member 20 is connected to the other crushing arm 15, so that the accommodation chamber can be efficiently used using the power from the crushing arm 15. S2 can be expanded and reduced.

  The storage container 17 is attached so that the storage chamber S2 is contracted when the distal ends of the crushing arms 15 are close to each other and the storage chamber S2 is expanded when the distal ends of the crushing arms 15 are separated from each other. Thereby, since the said hydraulic fluid can be accommodated in the storage container 17 at the time of reduction of the crushing cylinder 16 from which a lot of hydraulic fluid is derived | led-out, power loss can be reduced more effectively.

  Specifically, the storage container 17 is provided over a portion closer to the base end side than the axes J2 and J3 (rotation centers) of both the crushing arms 15. Here, since the base end portions of the two crushing arms 15 operate in the direction opposite to the tip portions of the two crushing arms 15, the base ends of the two crushing arms 15 are moved when the front end portions of the two crushing arms 15 are close to each other. The parts are separated from each other.

  Therefore, the storage chamber S2 expands when the leading ends of the crushing arms 15 are separated from each other (when the crushing cylinder 16 is contracted), and the storage chamber S2 is contracted when both the crushing arms 15 operate in the opposite direction.

  Accordingly, the hydraulic oil led out from the head side chamber of the crushing cylinder 16 is stored in the storage container 17 when the distal ends of both arms 15 are separated from each other, and is operated when the distal ends of both arms 15 are close to each other. Oil can be supplied (derived) to the head side chamber. As described above, since the hydraulic oil can be exchanged between the head side chamber that draws a larger amount of hydraulic oil than the rod side chamber and the storage chamber, the flow rate of the hydraulic oil flowing in the piping provided in the work arm is effective. Can be reduced.

  In addition, since the storage container 17 is provided at the base ends of the crushing arms 15, the storage container 17 can be disposed at a position on the base end side that does not interfere with the work performed by the distal ends of the crushing arms 15. it can. Thereby, workability | operativity using the crusher 9 is also improved.

  Since the first regeneration valve 24 is provided, the hydraulic oil derived from the rod side chamber of the crushing cylinder 16 in addition to the hydraulic oil derived from the storage container 17 when the crushing cylinder 16 is extended can be supplied to the head side chamber. Therefore, the crushing cylinder 16 can be increased in speed.

  Since the regeneration cut valve 26 is provided, the flow of hydraulic oil from the rod side passage R2 to the control valve 22 (the tank connected thereto) when the pressure in the head side passage R1 becomes equal to or higher than the regeneration cut pressure. Allowed, the regeneration of hydraulic oil from the rod side chamber to the head side chamber is cut.

  Thereby, since the pressure of the rod side chamber of the crushing cylinder 16 can be lowered in a situation where a large thrust is required for the crushing cylinder 16, the thrust of the crushing cylinder 16 can be increased.

  Since the high-pressure regulating valve 23 and the second regeneration valve 25 are provided, when the crushing cylinder 16 is extended, when the pressure in the head-side passage R1 is less than the set pressure, the high-pressure regulating valve from the container 17 to the head-side passage R1. The hydraulic oil can be guided through the cylinder 23, and the hydraulic oil is regenerated from the rod side passage R2 to the head side passage R1.

  When the pressure in the head side passage R1 becomes equal to or higher than the set pressure, the flow of the hydraulic oil through the storage passage R3 is restricted by the high pressure restriction valve 23, whereby the storage container 17 is blocked from the head side passage R1. At the same time, the hydraulic oil led out from the container 17 is guided to the rod side passage R2 via the second regeneration valve.

  When the pressure in the head side passage R1 becomes equal to or higher than the regeneration cut pressure, the regeneration cut means allows the flow from the rod side passage to the control valve (tank). The hydraulic oil led out from the 16 rod side chambers can be guided to the control valve 22 (tank).

  Therefore, by reducing the pressure in the storage chamber S2 of the storage container 17 during the regeneration cut, it is possible to reduce the thrust of the crushing cylinder 16 used to push out the hydraulic oil from the storage container 17. Therefore, the thrust of the crushing cylinder 16 can be further increased compared to the case where the hydraulic oil led out from the storage container 17 is supplied to the head side passage R1 even during the regeneration cut.

  On the other hand, when the drive cylinder is reduced, the pressure in the head side passage R1 becomes less than the set pressure, so that hydraulic oil is guided from the head side chamber of the crushing cylinder 16 to the containing container 17 via the high pressure regulating valve 23, The hydraulic oil can be stored in the storage container 17. That is, the “set pressure” is set higher than the pressure in the head side passage R1 when the crushing cylinder 16 is reduced.

<Second Embodiment (FIG. 9)>
In 1st Embodiment, although the crusher 9 which has the one storage container 17 was demonstrated, the quantity of a storage container is not limited to one, A plurality may be sufficient.

  The crusher 9 according to the second embodiment shown in FIG. 9 includes two storage containers 41.

  One end portion (the end portion of the extending member 20 in FIG. 9) of the container 41 is based on an axis J7 parallel to the axis J1 and is more pivotal than the axes J2 and J3 in the crusher body 14. It is attached to the end part.

  The other end of the container 41 (the end on the container body 18 side in FIG. 9) is attached to the crushing arm 15 so as to be rotatable about an axis J8 parallel to the axis J1. Specifically, the axis J8 is provided in a portion of the crushing arm 15 that is away from the axis J7 when the tip ends of the crushing arms 15 rotate in a direction in which they are close to each other.

  According to the second embodiment, by providing the two storage containers 41, a wider storage chamber S2 can be secured.

<Third Embodiment (FIGS. 10 to 13)>
In the said embodiment, although the container 17 and 41 which has a structure by which a part of extension member 20 is arrange | positioned in storage chamber S2 was demonstrated, the container 30 as shown to FIGS. 10-13 is employ | adopted. You can also.

  First, the configuration of the container 30 will be described with reference to FIG.

  The storage container 30 has the same configuration as the storage container 17 shown in FIG. 4 except for the positions of the communication part 18a and the open part 18b (positions of the storage room S2 and the open room S1).

  Specifically, the communication portion 18a is provided on the bottom portion (left wall portion in FIG. 12) side of the container body 18, and the open portion 18b is a lid portion (right wall portion in FIG. 12) of the container body 18. ) Side. A storage chamber S2 for storing hydraulic oil is formed between the movable member 19 and the bottom, and an opening opened to the atmospheric pressure by the opening 18b between the movable member 19 and the lid. A chamber S1 is formed. The extending member 20 extends from the movable member 19 to the outside of the container body 18 toward the side opposite to the bottom (the right side in FIG. 12).

  Further, the crusher 27 includes a crusher body 29, a crushing arm 15, a crushing cylinder (drive cylinder and rotating cylinder) 16, a storage container 30, and links (link mechanisms) 31 and 32. .

  The crusher main body 29 is provided at an attached portion 29a detachably attached to the distal end portion of the arm 8, a pair of cylinder attachment plates 29b extending from the attached portion 29a to the distal end side, and a distal end portion of the cylinder attachment plate 29b. Arm support portion 29c.

  The pair of cylinder mounting plates 29b are arranged to face each other in a direction orthogonal to the paper surface of FIG. For convenience of explanation, a part of the front cylinder mounting plate 29b is omitted. A pair of shafts J9 parallel to the shaft J2 are bridged between the base end portions of both cylinder mounting plates 29b.

  The base end portion (the end portion on the rod side) of the crushing cylinder 16 is attached to the cylinder attachment plate 29b so as to be rotatable about the axis J9.

  Since the attachment structure using the axis J4 of the tip part (the end part on the head side) of the crushing cylinder 16 and the attachment structure using the axes J2 and J3 of the crushing arm 15 are the same as those in the above embodiment, the description will be given. Omitted.

  The extending member 20 of the container 30 is connected to a portion of the crusher body 29 that is proximal to the axes J2 and J3 and distal to the shaft J9 (in FIG. 10, the proximal end of the arm support portion 29c). ing.

  The container body 18 of the storage container 30 is connected to a portion of the crushing arm 15 on the base end side with respect to the axes J2 and J3 via a link 31.

  The links 31 and 32 change the force in the direction in which the proximal ends of the crushing arms 15 are close to each other to the force in the direction in which the extending member 20 extends from the container body 18, and the proximal ends of the crushing arms 15 are Forces in directions away from each other are converted into forces in a direction in which the extending member 20 contracts with respect to the container body 30.

  Specifically, the base end portion of the link 31 is attached to the container body 18 so as to be rotatable about an axis J10 parallel to the axis J2. The distal end portion of the link 31 is attached to the proximal end portion of the crushing arm 15 so as to be rotatable about an axis J11 parallel to the axis J2.

  The base end portion of the link 32 is attached to the base end portion of the crushing arm 15 so as to be rotatable about the axis J11. Further, the distal end portion of the link 32 is attached to a position closer to the base end side than the axes J2 and J3 in the crusher body 29 in a state of being rotatable about an axis J12 parallel to the axis J2.

  The axis J12 is provided at a position closer to the tip than the axis J10, and the axis J11 is provided between the axis J12 and the axis J10. Therefore, when the crushing arm 15 rotates in a direction in which the base ends of the crushing arms 15 are close to each other, the links 31 and 32 are rotated in opposite directions around the axis J11. As a result, the shaft J10 (container body 18) moves to the proximal end side with respect to the shaft J12 (crusher main body 29). Thereby, the extending member 20 extends with respect to the container body 18. When the base end portions of the crushing arm 15 are separated from each other, the links 31 and 32 are rotated in the opposite direction to the above, so that the extending member 20 is contracted with respect to the container body 18.

  As shown in FIG. 13, the hydraulic circuit 28 for driving the storage container 30 controls the hydraulic pump 21 that supplies hydraulic oil to the crushing cylinder 16 and the supply and discharge of the hydraulic oil from the hydraulic pump 21 to both the crushing cylinders 16. And a control valve 22 for controlling.

  On the other hand, in the hydraulic circuit 28, unlike the hydraulic circuit 5 of the first embodiment, the high pressure regulating valve 23, the first regeneration valve 24, the second regeneration valve 25, and the regeneration cut valve 26 are omitted. Also in the hydraulic circuit 28, the storage chamber S2 of the storage container 30 expands when the crushing cylinder 16 is reduced (when the crushing arm 15 is opened), so that the hydraulic oil derived from the head side chamber of the crushing cylinder 16 is stored. It can be stored in the storage container 17 through the passage R3. On the other hand, since the storage chamber S2 of the storage container 30 is reduced when the crushing cylinder 16 is extended (when the crushing arm 15 is closed), the hydraulic oil in the storage container 30 is transferred to the head side chamber of the crushing cylinder 16 through the storage passage R3. Can be supplied.

  As described above, the extending member 20 extends from the movable member 19 to the side opposite to the bottom, that is, to the outside of the container body 18 without passing through the storage chamber S2. Therefore, the volume of the storage chamber S2 can be increased as compared with the storage container 17 having the extending member 20 that penetrates the bottom of the container main body 18 as in the first embodiment. The storage container 30 having the storage chamber S2 can be downsized.

  In addition, the storage container 30 is provided across both the crushing arm 15 and the crusher body 29, and a link mechanism (links 31 and 32) is interposed between the storage container 30 and the both crushing arms 15. . Here, since the portion of the both crushing arms 15 on the base end side relative to the respective rotation centers (the axes J2, J3) operates in the direction opposite to the front ends of the crushing arms 15, the front ends of the crushing arms 15 When they are close to each other, the proximal end portions of the crushing arms 15 are separated from each other.

  Therefore, when the two crushing arms 15 (the base ends thereof) are close to each other (when the crushing cylinder 16 is reduced), the extending member 20 is extended to expand the storage chamber S2, and the two crushing arms 15 (the base end portions) are mutually connected. When approaching (when the crushing cylinder 16 is extended), the extending member 20 is contracted and the accommodating chamber S2 is contracted.

  Accordingly, the hydraulic oil led out from the head side chamber of the crushing cylinder 16 is stored in the storage container 30 when the distal ends of both arms 15 are separated from each other, and is operated when the distal ends of both arms 15 are close to each other. Oil can be supplied (derived) to the head side chamber. As described above, since the hydraulic oil can be exchanged between the head side chamber that draws a larger amount of hydraulic oil than the rod side chamber and the storage chamber S2, the flow rate of the hydraulic oil flowing in the pipe provided in the work arm is reduced. It can be effectively reduced.

  In addition, since the storage container 30 is provided on the base end side with respect to the rotation center of the both crushing arms 15, the storage container 30 is located at a position on the base end side that does not interfere with the work performed by the distal ends of the both crushing arms 15. Can be arranged. Thereby, workability | operativity using the crusher 27 is also improved.

<Fourth Embodiment (FIG. 14)>
In the above-described embodiment, the crusher has been described so that both the crushing arms 15 are rotated with respect to the crusher main body. What is necessary is just to be comprised so that the other crushing arm (2nd crushing arm) may rotate. In addition, about the structure similar to 2nd Embodiment shown in FIG. 9, the same code | symbol is attached | subjected and the description is abbreviate | omitted.

  The crusher 43 according to the fourth embodiment includes a crushing arm (first crushing arm) 44 fixed to the crusher body 14 and a crushing arm (second crushing) attached to the crusher body 14 so as to be rotatable. Arm) 15.

  The crushing arm 15 has its tip end close to the tip end of the crushing arm 44 due to the extension of the crushing cylinder 16, and is separated from the tip end of the crushing arm 44 due to the reduction of the crushing cylinder 16. 14 is attached.

  Further, the container 41 includes the crushing arm 15 and the crusher main body so that the accommodation chamber S2 is reduced in accordance with the close movement of both the crushing arms 15 and the storage chamber S2 is expanded in accordance with the separating operation of both the crushing arms 15. 14.

  Even when the storage container 41 is provided across the crushing arm 15 and the crushing arm 44, the storage chamber S <b> 2 can be expanded and contracted according to the approach and separation of the arms 15 and 44.

  In addition, this invention is not limited to the said embodiment, For example, the following aspects can also be employ | adopted.

  In the embodiment, the configuration in which the storage chamber S2 of the storage container is connected to the head side chamber (head side passage R1) of the crushing cylinder 16 has been described, but the storage chamber S2 includes the head side chamber and the rod side chamber of the crushing cylinder 16. It is only necessary to connect to a chamber that expands when the storage chamber S2 is reduced and that contracts when the storage chamber S2 is expanded. For example, when the storage container is provided so that the storage chamber S2 expands when the crushing arm is closed, the storage chamber S2 may be connected to the rod side chamber (rod side passage) of the crushing cylinder 16. However, the amount of hydraulic oil derived from the head side chamber of the crushing cylinder 16 is larger than that derived from the rod side chamber of the crushing cylinder 16. For this reason, when the communication portion 18a is connected to the head side passage R1, the effect of reducing the hydraulic oil pressure loss is greater than when the communication portion 18a is connected to the rod side passage R2.

  Further, the example in which the storage container is connected to the crushing cylinder 16 via the head side passage R1 or the rod side rod passage R2 has been described, but the storage container is directly connected to the head side chamber or the rod side chamber of the crushing cylinder 16. Also good. Specifically, an example in which the storage passage R3 is connected to the head side chamber of the crushing cylinder 16 via the head side passage R1 has been described. However, even if the storage passage R3 is directly connected to the head side chamber of the crushing cylinder 16 Good. Further, the storage passage R3 may be directly connected to the crushing cylinder 16 rod side chamber.

  Although the storage chamber S2 is reduced when the distal ends of the crushing arms 15 are close to each other and the storage chamber S2 is expanded when the distal ends of the crushing arms 15 are separated from each other, the mounting structure of the storage container is described here. It is not limited to. Even if the storage container is attached to the crusher so that the storage chamber S2 expands when the distal ends of the crushing arms 15 approach each other and the storage chamber S2 contracts when the distal ends of the crushing arms 15 move away from each other. Good.

  Although the hydraulic pilot type regeneration cut valve 26 and the high pressure restriction valve 23 have been described as an example of the regeneration cut means and the high pressure restriction means, the configuration of these means is not limited to this. For example, an electromagnetic valve having a switching position similar to that of the regeneration cut valve 26 and the high-pressure regulating valve 23, a sensor capable of detecting the pressure in the head side passage R1, and a command is output to the electromagnetic valve based on a detection result by the sensor. A regeneration cut means and a high-pressure regulating means having a controller can also be adopted.

  In the said embodiment, the attachment destination of the container main body of a storage container and the attachment destination of a movable member can also be reversed.

  In the hydraulic circuit 5 in the first embodiment, the high pressure regulating valve 23, the second regeneration passage R5, and the second regeneration valve 25 may be omitted. Even in this configuration, the thrust of the crushing cylinder 16 can be improved by switching the regeneration cut valve 26 to the regeneration cut position.

  Furthermore, in the hydraulic circuit 5 in the first embodiment, the first regeneration passage R4, the first regeneration valve 24, and the regeneration cut valve 26 can be omitted. Also in this configuration, hydraulic oil can be exchanged between the storage container 17 and the crushing cylinder 16 through the storage passage R3.

  In the above-described embodiment, the example in which the hydraulic oil led out from the container 17 is returned to the head side chamber of the crushing cylinder 16 has been described. It is not limited to returning the hydraulic oil to the head side chamber. For example, in the hydraulic circuit 28 shown in FIG. 13, the flow passage R3 is connected to the rod side passage R2 instead of the head side passage R1, and the flow of hydraulic oil from the storage chamber S2 to the rod side passage R2 is allowed, A check valve for restricting the reverse flow may be provided in the flow passage R3. Also in this configuration, the hydraulic oil stored in the storage chamber S2 when the crushing cylinder 16 is extended can be returned to the rod side passage R2, that is, the tank when the crushing cylinder 16 is extended when the crushing cylinder 16 is reduced. Thereby, compared with the case where a large amount of hydraulic oil is returned to the machine body through a pipe provided along the work arm when the crushing cylinder 16 is reduced, the peak flow rate of the hydraulic oil passing through the pipe can be reduced. Therefore, the pressure loss proportional to the square of the flow rate of the hydraulic oil can be effectively reduced.

J2, J3 axes (rotation center of crushing arm)
R1 Head side passage R2 Rod side passage R3 Storage passage R4 First regeneration passage R5 Second regeneration passage S2 Storage chamber 1 Demolition machine (an example of a construction machine)
2 Lower traveling body (an example of the aircraft)
3 Upper revolving structure (an example of the aircraft)
6 Main boom (example of working arm)
7 Inter Boom (Example of work arm)
8 Arm (Example of working arm)
9, 27, 41, 43 Crusher 14, 29 Crusher body 15, 44 Crushing arm 16 Crushing cylinder (an example of a drive cylinder and a rotating cylinder)
17, 30, 33, 37, 41 Storage container 18 Container body 18a, 34a, 38a Communication part 19 Movable member 20 Extension member 21 Hydraulic pump 22 Control valve 23 High pressure regulating valve (an example of high pressure regulating means)
24 1st regeneration valve 25 2nd regeneration valve 26 regeneration cut valve (an example of regeneration cut means)
31, 32 link (an example of a link mechanism)

Claims (11)

A crusher attached to a distal end portion of the work arm in a construction machine having a machine body and a work arm having a base end portion attached to the machine body,
A crusher body attached to the working arm;
A first crushing arm provided in the crusher body;
A second crushing arm provided so as to be rotatable with respect to the crusher body;
The distal end portion of the second crushing arm comes close to the distal end portion of the first crushing arm by the extension operation, and the front end portion of the second crushing arm is separated from the front end portion of the first crushing arm by the reduction operation. A drive cylinder for rotating the second crushing arm;
A storage chamber for storing the hydraulic oil from the drive cylinder, and a storage container capable of deriving the hydraulic oil in the storage chamber as the storage chamber shrinks;
The storage container includes a container main body and a movable member that forms the storage chamber between the container main body and is relatively displaceable with respect to the container main body.
One of the container body and the movable member is connected to the second crushing arm so that the storage chamber expands and contracts in accordance with the proximity and separation of the second crushing arm with respect to the first crushing arm; and The other of the container body and the movable member is connected to at least one of the first crushing arm and the crusher body,
The crusher in which the storage chamber of the storage container is connected to a chamber that expands when the storage chamber is contracted and contracts when the storage chamber is expanded, among the head side chamber and the rod side chamber of the drive cylinder. The crusher according to claim 1,
The container body is formed in a cylindrical shape having a bottom,
The movable member is slidably provided in the container body while facing the bottom.
The said container is a crusher further provided with the extension member which penetrates the said bottom part and extends from the said movable member to the outer side of the said storage chamber. The crusher according to claim 1,
The container body is formed in a cylindrical shape having a bottom,
The movable member is slidably provided in the container body while facing the bottom.
The said container is a crusher further provided with the extending member extended to the outer side of the said container main body toward the opposite side to the said bottom part from the said movable member. The crusher according to any one of claims 1 to 3,
According to the proximity of the tip of the second crushing arm with respect to the tip of the first crushing arm, the storage chamber shrinks and according to the separation of the tip of the second crushing arm with respect to the tip of the first crushing arm One of the container main body and the movable member is connected to the second crushing arm, and the other of the container main body and the movable member is connected to the first crushing arm and the Connected to at least one of the crusher bodies,
The crusher, wherein the storage chamber of the storage container is connected to the head side chamber of the drive cylinder. The crusher according to claim 2,
The first crushing arm is provided to be rotatable with respect to the crusher body,
In the crusher, the distal end portion of the first crushing arm comes close to the distal end portion of the second crushing arm by the extension operation, and the distal end portion of the first crushing arm is brought to the front end of the second crushing arm by the reduction operation. A rotating cylinder for rotating the first crushing arm so as to be separated from the portion,
The storage chamber of the storage container is connected to the drive cylinder and the head side chamber of the rotation cylinder so as to be able to store the hydraulic oil derived from the head side chamber of the drive cylinder and the rotation cylinder,
One of the container main body and the extending member is connected to a portion of the second crushing arm on the base end side with respect to the rotation center thereof, and the other of the container main body and the extending member is the first A crusher that is connected to a portion of the crushing arm that is proximal to the center of rotation. The crusher according to claim 3,
The first crushing arm is provided to be rotatable with respect to the crusher body,
In the crusher, the distal end portion of the first crushing arm comes close to the distal end portion of the second crushing arm by the extension operation, and the distal end portion of the first crushing arm is brought to the front end of the second crushing arm by the reduction operation. A rotating cylinder for rotating the first crushing arm so as to be separated from the portion,
The storage chamber of the storage container is connected to the drive cylinder and the head side chamber of the rotation cylinder so as to be able to store the hydraulic oil derived from the head side chamber of the drive cylinder and the rotation cylinder,
One of the container main body and the extending member is linked to a portion of the first crushing arm that is proximal to the rotation center of the first crushing arm and a portion of the second crushing arm that is proximal to the rotation of the rotation center. And the other of the container main body and the extending member is connected to a portion on the base end side with respect to the both rotation centers in the crusher main body,
The link mechanism converts a force in a direction in which the base end portions of the arms are close to each other into a force in a direction in which the extending member extends from the container body, and the base end portions of the arms are separated from each other. A crusher that converts a direction force into a force in a direction in which the extending member contracts with respect to the container body. A hydraulic drive device,
The crusher according to any one of claims 1 to 3,
A hydraulic pump provided in the airframe for supplying hydraulic oil to the drive cylinder;
A control valve provided in the airframe for controlling supply and discharge of hydraulic oil to and from the drive cylinder;
The hydraulic drive device, wherein the storage chamber of the storage container is connected to a chamber that expands when the storage chamber is contracted and contracts when the storage chamber is expanded, among the head side chamber and the rod side chamber of the drive cylinder. A hydraulic drive device,
Crusher according to claims 4-6,
A hydraulic pump provided in the airframe for supplying hydraulic oil to the drive cylinder;
A control valve provided in the airframe for controlling supply and discharge of hydraulic oil to and from the drive cylinder;
The hydraulic drive device, wherein the storage chamber of the storage container is connected to a head side chamber of the drive cylinder. The hydraulic drive device according to claim 8,
The crusher is provided in a first regeneration passage that connects a rod-side passage connecting the control valve and a rod-side chamber of the drive cylinder and a head-side passage connecting the control valve and a head-side chamber of the drive cylinder. The hydraulic drive device further includes a first regeneration valve that allows the flow of hydraulic oil from the rod side passage toward the head side passage while restricting the flow in the opposite direction. The hydraulic drive device according to claim 9,
The crusher is provided in the rod side passage, and restricts the flow of hydraulic oil from the rod side passage to the control valve when the pressure in the head side passage is less than a preset regeneration cut pressure. On the other hand, a hydraulic drive device comprising regeneration cut means for allowing the flow of hydraulic oil from the rod side passage toward the control valve when the pressure in the head side passage is equal to or higher than the regeneration cut pressure. The hydraulic drive device according to claim 10,
The crusher
Provided in a storage passage for connecting the head side chamber and the storage chamber, and the pressure for the storage when the pressure in the head side passage is less than a preset pressure set as a pressure equal to or lower than the regeneration cut pressure High pressure regulating means for allowing the flow of hydraulic oil through the passage while regulating the flow of hydraulic oil through the storage passage when the pressure in the head side passage is equal to or higher than the set pressure;
Provided in a second regeneration passage that connects the portion between the high-pressure regulating means of the storage passage and the storage chamber and the rod-side passage, and allows the flow of hydraulic oil from the storage chamber toward the rod-side passage. A hydraulic drive device, further comprising: a second regeneration valve that restricts the flow in the opposite direction while permitting.

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