JP2006183263A - Device and adapter for connecting attachment piping of hydraulic excavator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a device and an adapter for connecting the attachment piping of a hydraulic excavator which enable attachment-side piping to be easily connected to the attachment connecting piping. <P>SOLUTION: In the device for connecting the attachment piping of the hydraulic excavator, the attachment connecting piping 14 is provided on the leading-end side of the articulated arm 6 of the hydraulic excavator. The device is characterized by being equipped with a stop valve 16 which is connected to the leading-end side of the piping 14, and a connecting member 17 which is connected to the stop valve 16, can be turned by a turning joint and has a plurality of piping connection ports with connecting screws different from one another in sizes and types. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a pipe connection device and a connection adapter for an attachment attached to the tip of a work arm of a hydraulic excavator.

  An excavator bucket is usually attached to the tip of the articulated arm of a hydraulic excavator. However, in order to improve the versatility of the work, the excavator bucket is replaced with an articulated attachment such as a crusher. Sometimes attached to the tip of an arm.

  In order to supply hydraulic oil to the attachment thus replaced, a pipe connected to the hydraulic power source of the main body of the excavator is arranged on the side of the tip side of the articulated arm, and the attachment is attached to the tip of the pipe. The connection port part to which piping is connected is provided (for example, refer patent document 1).

JP-A-9-71076, FIG.

    On the other hand, in order to effectively use the functionality of a hydraulic excavator, in recent years, there is a demand to use various attachments at the tip of the articulated arm. In this case, the size and type of the connection port screw in the supply / discharge piping on each attachment side may differ from the screw size and type in the connection port portion of the attachment connection pipe described above. Several types of auxiliary connection adapters suitable for the size and type of this screw are prepared, and the auxiliary connection adapter corresponding to the attachment to be used is replaced with the connection port of the attachment connection pipe each time. The connection supply / exhaust piping was connected to the connection adapter.

  In such a connection configuration, it is necessary to replace the auxiliary connection adapter, and there is a problem that the connection work is troublesome and a plurality of auxiliary connection adapters must be provided.

  An object of the present invention is to provide an attachment pipe connection device and a connection adapter for a hydraulic excavator that can improve the above-described problems and can easily connect the pipe on the attachment side to the attachment connection pipe.

  In order to achieve the above object, the present invention provides a hydraulic excavator attachment pipe connection device including an attachment connection pipe on the distal end side of the articulated arm of the hydraulic excavator. A stop valve connected to the distal end side and a connecting member connected to the stop valve and rotatable by a swivel joint and having a plurality of pipe connection ports each having different screw sizes and types of connection screws It is in the attachment piping connection apparatus of the hydraulic excavator characterized by this.

  In addition, the second invention is an attachment pipe connection device for a hydraulic excavator provided with an attachment connection pipe on the tip side of the articulated arm of the hydraulic excavator, wherein one opening connected to the tip side of the attachment connection pipe and the other A stop valve having an opening and a valve body that cuts off and communicates with the opening; a bent pipe having one end connected to the other opening of the stop valve and the other end bent outward from the side of the articulated arm; And a connecting member having a plurality of pipe connection ports each having a connection thread of different screw sizes and types, each of which is rotatably connected to the curved pipe via a swivel joint. The attachment pipe connection device.

  Furthermore, a third aspect of the present invention is the attachment piping connection device for a hydraulic excavator provided with an attachment connection pipe on the distal end side of the articulated arm of the hydraulic excavator, wherein one opening connected to the distal end side of the attachment connection pipe and the other A plurality of stop valves each having an opening and a valve body that cuts off and communicates with the openings; and one end connected to the other opening of the stop valve, each having a connection screw of a different screw size and type on the other end side. An attachment pipe connection device for a hydraulic excavator, characterized in that the connection member has a pipe connection port.

  According to a fourth aspect of the present invention, there is provided an attachment pipe connection adapter for a hydraulic excavator provided with an attachment connection pipe at the tip end side of the articulated arm of the hydraulic excavator, wherein one end is connected to the tip end side of the attachment connection pipe. And a connecting member having a plurality of pipe connection ports each connected to the curved pipe through a joint and having a connection thread of different screw sizes and types. This is an attachment pipe connection adapter for a hydraulic excavator.

  According to the present invention, since the connection part that can connect various attachment pipes is provided at the connection port part of the attachment connection pipe, the pipe connection work at the time of replacing the attachment becomes easy and the workability is improved. In addition, since the work time for connecting the pipes can be shortened, the work returnability of the hydraulic excavator can be improved.

DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of an attachment piping connection device for a hydraulic excavator according to the present invention will be described with reference to the drawings.
FIG. 1 is a perspective view showing a hydraulic excavator type working machine equipped with an embodiment of an attachment piping connection device for a hydraulic excavator of the present invention. In FIG. 1, the working machine 1 includes a traveling body 2 and a traveling body. The revolving structure 3 provided on the revolving body 2 so as to be able to swivel, the power source 4 mounted on the revolving structure 3, the cab 5 provided on the front side of the revolving structure 3, and the front of the revolving structure 3 being raised and lowered. The multi-joint arm 6 is provided, and the excavation bucket 7 is rotatably provided at the tip of the multi-joint arm 6.

  The articulated arm 6 includes a boom 8 whose base is provided on the front part of the revolving body 3 so as to be able to move up and down, and an arm 9 provided on the tip of the boom 8 so as to be rotatable. An excavation bucket 7 as one of attachments is detachably attached to the tip of the arm 9. The boom 8 is moved up and down by a cylinder 10 provided between the boom 8 and the swing body 3. The arm 9 is rotated by a cylinder 11 provided between the arm 9 and the boom 8. The excavation bucket 7 is rotated by a cylinder 13 connected via a link 12.

  Attachment connecting pipes 14 connected to the power source 4 are respectively held by holding tools 15 on the sides of the boom 7 and the arm 9. The distal ends of the attachment connecting pipes 14 are respectively located on the side portions on the distal end side of the arm 9. As shown in FIG. 2, a pipe connection device 18 including a stop valve 16 and a connection member 17 connected to the stop valve 16 and having a plurality of pipe connection ports is provided at the tip of the attachment connection pipe 14, respectively.

  A detailed configuration of the pipe connection device 18 will be described with reference to FIGS. 3 and 4. 3 is a front view showing an embodiment of the attachment pipe connection device of the present invention shown in FIG. 2 in an enlarged manner, and FIG. 4 is a partial view of the embodiment of the attachment pipe connection device of the present invention shown in FIG. It is a top view shown with a cross section. In these drawings, the same reference numerals as those in FIGS. 1 and 2 are the same parts. The stop valve 16 has a valve housing 21 having a communication hole 19 on one side and a communication hole 20 on the other side, and a valve hole 22 that is rotatably provided in the valve housing 21 and blocks communication between the communication holes 19 and 20. And a valve body 23 having.

  The stop valve 16 is held at the tip of the attachment connection pipe 14 made of steel pipe by a connection screw 24 screwed into the communication hole 19 on one side thereof and the tip side of the attachment connection pipe 14 and is brought into a communication state. It is connected.

  One end of a curved pipe 26 is connected to the communication hole 20 on the other side of the stop valve 16 by a connection screw 25. The other end side of the bent pipe 26 is closed and has one communication hole 27 connected to a passage in the bent pipe 26. The outer peripheral surface on the other end side of the curved pipe 26 forms a swivel joint (swivel joint) with a connecting member described later.

  A connecting member 29 having a plurality of (four in this example) communication holes 28 that selectively communicate with the communication holes 27 of the curved pipe 26 is rotatably provided on the outer peripheral surface on the other end side of the curved pipe 26. ing. The connecting member 29 is configured so that movement of the other end side portion of the curved pipe 26 in the axial direction is suppressed by the snap ring 30 and oil leakage from the sliding surface is prevented by the seal 31. .

  In each communication hole 28 of the connection member 29, one screw portion of the connection screw 32 having a different screw size and type is screwed into the connection hole in the attachment-side piping to be provided. Of these connection screws 32, a closing cap 33 is screwed into the other screw portion of the connection screw 32 to which the attachment-side pipe 34 is not connected. 3 and 4 show a state in which the attachment side piping 34 is connected to the threaded portion of the connection screw 32 at the left end in the drawing. When other attachments are used, the connection member 29 is connected to the curved pipe 26. The connection screw 32 that rotates around and matches the connection screw in the pipe 34 on the other attachment side is positioned on the left side in the drawing, and the other screw portion of the connection screw 32 positioned on the left side is connected to the other attachment side. The connection screw in the pipe 34 is screwed and connected.

Next, the operation of an embodiment of the above-described attachment pipe connection device and connection adapter for a hydraulic excavator according to the present invention will be described with reference to the drawings.
As shown in FIG. 1, when crushing concrete or the like with an attachment such as a crusher from the state where excavation bucket 7 provided at the tip of the articulated arm 6 is excavated, first, the articulated arm is used. The excavation bucket 7 is removed from the tip of 6 and an attachment such as a crusher is attached to the tip of the articulated arm 6.

  Next, each connection member 29 shown in FIG. 3 and FIG. 4 is rotated around the curved pipe 26 so that the connection screw 32 of the same size and type as the connection screw at the connection port of the pipe 34 on the attachment side is connected to the pipe. From the viewpoint of connection, the closure cap 33 is removed from the connection screw 32 by being positioned on the left side shown in FIGS. Thereafter, the connection screw of the pipe 34 on the attachment side is screwed into the other screw portion of the connection screw 32 in the connection member 29 located on the left side.

  Next, if the valve body 23 of the stop valve 16 is rotated and the valve hole 22 is made to coincide with the communication hole 19 on one side and the communication hole 20 on the other side of the valve housing 21, the attachment connection pipe 14 is connected to each other. The stop valve 16 and the bent pipe 26 can be communicated with the attachment-side piping 34 through the communication holes of the connecting member. Thereby, the pressure oil from a hydraulic power source can be supplied to an attachment, and the waste oil from an attachment can be returned to the hydraulic power source side.

  As described above, each connection member 29 is provided with a plurality of connection screws 32 of the same screw type that match the joining screw at the connection port of the pipe 34 of the attachment to be attached, so that the pipe 34 on the attachment side can be connected. It becomes easy and the workability is improved, and the work time for pipe connection can be shortened, so that the work returnability of the hydraulic excavator can be improved. In addition, it is not necessary to prepare an auxiliary connection adapter that has been conventionally used.

  In the above-described embodiment, four connection screws 32 are provided on the connection member 29. However, the number of attachments of the connection screws 32 can be changed as appropriate.

  FIG. 5 shows another embodiment of the attachment pipe connection device and connection adapter for a hydraulic excavator according to the present invention. In this figure, the same reference numerals as those shown in FIGS. 1 to 4 denote the same or corresponding parts. It is. In this embodiment, the pipe body 35 is provided with a plurality of branch portions, each branch portion is provided with a connection screw 32, and the pipe body 35 is connected to the stop valve 16.

  According to this embodiment, the connection of the pipe 34 on the attachment side is facilitated, the workability thereof is improved, and the work time for connecting the pipe can be shortened. Can be increased. Further, it is not necessary to prepare an auxiliary connection adapter that has been used conventionally, and the manufacturing cost is low.

It is a perspective view of a hydraulic excavator provided with one embodiment of an attachment piping connection device of the present invention. It is a front view which expands and shows one Embodiment of the attachment piping connection apparatus of this invention shown in FIG. It is a front view which expands further and shows one Embodiment of the attachment piping connection apparatus of this invention shown in FIG. It is a top view which shows one Embodiment of attachment piping connection apparatus of this invention shown in FIG. 3 in a partial cross section. It is a front view which expands and shows other embodiment of the attachment piping connection apparatus of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Work machine 6 Articulated arm 9 Arm 14 Attachment connection piping 16 Stop valve 17 Connection member

Claims (4)

  In a hydraulic excavator attachment pipe connecting device provided with an attachment connection pipe on the distal end side of the articulated arm of the hydraulic excavator, a stop valve connected to the distal end side of the attachment connection pipe and the stop valve are connected to each other by a swivel joint. An attachment pipe connection device for a hydraulic excavator, comprising a connection member having a plurality of pipe connection ports which are rotatable and have different screw sizes and types of connection screws.   In an attachment piping connection device for a hydraulic excavator provided with an attachment connection pipe on the distal end side of the articulated arm of the hydraulic excavator, one opening connected to the distal end side of the attachment connection pipe, the other opening, and these openings are cut off from communication. A stop valve having a valve body, a bent pipe having one end connected to the other opening of the stop valve, and the other end bent outward from a side of the articulated arm, and a joint connected to the bent pipe. An attachment pipe connection device for a hydraulic excavator, comprising a connection member having a plurality of pipe connection ports that are rotatably connected to each other and have connection screws of different screw sizes and types.   In an attachment piping connection device for a hydraulic excavator provided with an attachment connection pipe on the distal end side of the articulated arm of the hydraulic excavator, one opening connected to the distal end side of the attachment connection pipe, the other opening, and these openings are cut off from communication. A connection member having a plurality of pipe connection ports having one end connected to the other opening of the stop valve and a different screw size and type of connection screw on the other end side; An attachment piping connection device for a hydraulic excavator characterized by comprising:   In an attachment pipe connection adapter for a hydraulic excavator provided with an attachment connection pipe on the tip side of the articulated arm of the hydraulic excavator, a curved pipe having one end connected to the tip side of the attachment connection pipe and the other end closed. And a connecting member having a plurality of pipe connection ports each having a connection thread of different screw sizes and types, each of which is rotatably connected to the curved pipe via a swivel joint. Attachment pipe connection adapter.

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