JP2009209538A - Hydraulic excavator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a hydraulic excavator which can supply a hydraulic fluid to a working device, attached to a leading end of a working arm, by the simple constitution of components and easy assembly. <P>SOLUTION: This hydraulic excavator includes: a hydraulic cylinder (22) which brings about the swing operation of the working device attached to the leading end of the working arm (16); a pair of hydraulic hoses (24a and 24b) for the supply and discharge of the hydraulic fluid, which is connected to the hydraulic cylinder; and a pair of pieces of hydraulic piping (26a and 26b) which is attached near the hydraulic cylinder. One end of each of the pieces of hydraulic piping is equipped with connecting portions (A1 and A2) which can connect the pair of hydraulic hoses by detaching them from the hydraulic cylinder; and the other end thereof, which is elongated toward the leading end of the working arm (16), is equipped with connecting portions (B1 and B2) for the supply and discharge of the hydraulic fluid. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a hydraulic excavator, and more particularly, to a hydraulic excavator that can supply hydraulic oil to a working device attached to the tip of a working arm with a configuration that is inexpensive and easy to install.

  Various working devices such as a gripping device, a processor, and a grab bucket are appropriately used at the tip of the working arm of a hydraulic excavator that is a general-purpose working machine, depending on the work, instead of the bucket of the working device that is normally attached. Mounted.

Many of these working devices are equipped with hydraulic actuators, so when installing the working device, it is dedicated to supplying hydraulic oil along the work arm from the hydraulic source of the machine body to supply hydraulic oil. (See, for example, Patent Document 1).
JP 2006-183206 A (FIG. 1)

  The conventional hydraulic excavator having the configuration as described above has the following problems that are desired to be improved.

  That is, in order to supply the working oil to the working device, it is necessary to install at least two dedicated hydraulic pipes for supplying and discharging the working oil from the machine body to the tip along the working arm. In addition, a switching valve for controlling the supply and discharge of hydraulic oil is also necessary. Therefore, installation of the hydraulic piping for the working device requires many costs such as parts cost and assembly cost.

  The present invention has been made in view of the above-mentioned facts, and its technical problem is to provide a hydraulic excavator that can supply hydraulic oil to a working device attached to the tip of a working arm with a simple component configuration and easy assembly. It is to be.

  According to the present invention, as a hydraulic excavator that solves the above technical problem, a hydraulic cylinder that swings a working device attached to the tip of a working arm, and a pair of hydraulic oil supply and discharge hydraulic fluid connected to the hydraulic cylinder A hose and a pair of hydraulic pipes attached in the vicinity of the hydraulic cylinder, each of the hydraulic pipes having a connecting portion capable of disconnecting and connecting the pair of hydraulic hoses from the hydraulic cylinder at one end. A hydraulic excavator is provided, characterized in that a hydraulic oil supply / discharge connecting portion is provided at the other end extending toward the tip of the working arm.

  A hydraulic excavator configured according to the present invention includes a pair of hydraulic pipes in the vicinity of a standardly equipped hydraulic cylinder, and a connecting portion that can connect a hydraulic hose removed from the hydraulic cylinder to one end of each hydraulic pipe. Since the other end extending toward the tip of the work arm is provided with a connecting portion for supplying and discharging hydraulic oil, when attaching a work device that does not require the above-mentioned hydraulic cylinder to swing to the tip of the work arm. The hydraulic oil for the hydraulic cylinder can be used as the hydraulic fluid for the working device by connecting the hydraulic hoses removed from the hydraulic cylinder to the pair of hydraulic pipes. In addition, a control valve that supplies and discharges hydraulic oil to and from the hydraulic cylinder can be used as a control valve for the working device.

  Therefore, the hydraulic oil can be supplied to the working device with a simple component configuration and easy assembly without attaching a dedicated pipe for supplying the hydraulic oil along the work arm from the hydraulic source.

  Hereinafter, a hydraulic excavator constructed in accordance with the present invention will be described in more detail with reference to the accompanying drawings illustrating preferred embodiments.

  This will be described with reference to FIG. The hydraulic excavator generally indicated by numeral 2 includes a lower traveling body 4 and an upper revolving body 6 that is pivotably mounted on the lower traveling body 4. The upper revolving body 6 has a driver's seat 8 and a work arm at the front end thereof. 10 is provided. Various work devices are attached to the tip of the work arm 10 on the axis X according to the form of work. In the illustrated example, the bucket 12 is attached so as to be swingable about the axis X.

  The work arm 10 includes a boom 14 attached to the upper swing body 6 so as to be swingable in the vertical direction, an arm 16 attached to the tip of the boom 14 so as to be swingable in the vertical direction, the upper swing body 6 and the boom 14. And a boom operating cylinder 20 attached between the boom 14 and the arm 16.

  The working arm 10 is also provided with a bucket operating cylinder 22 as a hydraulic cylinder that swings the bucket 12 that is a working device attached to the tip of the arm 16.

  A description will be given with reference to FIG. 1 which is an enlarged detail view of the distal end portion of the work arm 10. A pair of hydraulic hoses 24 a and 24 b for supplying and discharging hydraulic oil are connected to the bucket operating cylinder 22. A pair of hydraulic pipes 26 a and 26 b are attached to the side surface of the arm 16 in the vicinity of the bucket operating cylinder 22.

  One end of each of the hydraulic hoses 24a and 24b is connected to a bucket operating cinder control valve provided in the hydraulic source of the upper swing body 6 (FIG. 2), and the other end is connected to the rod side pipe 28a and the head of the bucket operating cylinder 22. Each is connected to the side pipe 28b.

  The hydraulic pipes 26a and 26b are formed by bending a steel pipe and attaching connection joints to both ends. The hydraulic pipes 26 a and 26 b are fixed to the side surface of the arm 16 at a plurality of locations by clamps 30 and bolts 31. Each of the hydraulic pipes 26a and 26b includes connection portions A1 and A2 formed by connection joints capable of disconnecting the hydraulic hoses 24a and 24b from the hydraulic cylinder and connecting them to one end of the hydraulic pipes 26a and 26b. The other end is provided with connection portions B1 and B2 formed by connection joints for supplying and discharging hydraulic oil.

  The pair of hydraulic pipes 26 a and 26 b are installed at positions that do not interfere with the operation of the bucket operation cylinder 22. A protective cap 29 is attached to each of the connection parts B1 and B2. A hydraulic hose extending from the working device attached to the tip of the arm 16 is connected to the connecting portions B1 and B2 from which the protective cap 29 has been removed.

  As typical examples of the working device that does not require a swing operation and is attached to the tip of the working arm 10 (arm 16) around the axis X, there are, for example, a ferrule buncher 32, a grab bucket 34, a gripping device 36, and the like shown in FIG. . The feller buncher 32 performs debranching and chopping of the wood cut by the hydraulic actuator. The grab bucket 34 opens and closes the lower openings of the pair of buckets like a clam by a hydraulic actuator. The gripping device 36 opens and closes a pair of clamps by a hydraulic actuator to grip scrap material or the like.

  Mainly referring to FIG. 1, the function and effect of the excavator 2 as described above will be described.

  The hydraulic excavator 2 includes a pair of hydraulic pipes 26a and 26b in the vicinity of a hydraulic cylinder 22 that is normally equipped to swing the working device 12, and one end of each of the hydraulic pipes 26a and 26b is connected to the hydraulic cylinder 22 from one end. Connection portions A1 and A2 to which the removed hydraulic hoses 24a and 24b (shown by two-dot chain lines) can be connected, and connection portions B1 and B2 for supplying and discharging hydraulic oil are provided at the other end extending toward the tip of the work arm 16. ing.

  Further, for example, a ferrule buncher 32, a grab bucket 34, and a gripping device that do not require a swinging operation instead of a working device such as the bucket 12 that requires a swinging operation at the tip of the work arm 10 (arm 16). When installing a working device such as 36, hydraulic oil for the hydraulic cylinder 22 is supplied to the working devices 32, 34 by attaching hydraulic hoses 24a, 24b removed from the hydraulic cylinder to the pair of hydraulic pipes 26a, 26b, respectively. , 36 and the like. Further, the hydraulic oil control valve 22 to the hydraulic Linder can be used as the hydraulic oil control valve to the work devices 32, 34, 36 and the like.

  Accordingly, a pair of hydraulic pipes 26a and 26b are provided in the vicinity of the hydraulic cylinder 22 equipped as standard, and the connection of the hydraulic hoses 24a and 24b may be changed. Therefore, a dedicated pipe along the work arm from the hydraulic source, Installation of a control valve or the like is unnecessary, and hydraulic oil can be supplied to a work device attached to the tip of the work arm with a simple component configuration and easy assembly.

  When installing a work device such as the bucket 12 that requires a swing operation instead of the work devices 32, 34, and 36 that do not need a swing operation, the hydraulic hoses 24a and 24b are connected to the hydraulic pipes 26a and 26b. What is necessary is just to remove from parts A1 and A2 and to attach to the hydraulic cylinder 22.

  Therefore, the versatility of the hydraulic excavator can be further enhanced with a simple component configuration and easy assembly.

The enlarged detail drawing of the front-end | tip part of the working arm of the hydraulic shovel comprised according to this invention. The side view of the hydraulic excavator with which the bucket as a working apparatus was attached. The figure which showed the typical example of the working apparatus which does not require rocking | fluctuation operation | movement.

Explanation of symbols

2: Excavator 10: Working arm 16: Arm (working arm)
12: Bucket (working device)
22: Bucket operating cylinder (hydraulic cylinder)
24a, 24b: Hydraulic hoses 26a, 26b: Hydraulic piping 32: Feller bunchers (working equipment)
34: Grab bucket (working equipment)
36: Holding device (working device)
A1, A2: Connection part B1, B2: Connection part

Claims (1)

A hydraulic cylinder for swinging a working device attached to the tip of the working arm;
A pair of hydraulic hoses for supplying and discharging hydraulic fluid connected to the hydraulic cylinder;
A pair of hydraulic piping attached in the vicinity of the hydraulic cylinder,
Each of the hydraulic pipes is provided with a connecting portion capable of disconnecting and connecting the pair of hydraulic hoses from the hydraulic cylinder at one end, and connecting the hydraulic oil supply / discharge at the other end extending toward the tip of the working arm. Has a part,
A hydraulic excavator characterized by that.

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