JP2010168871A - Auxiliary valve installation structure in construction machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce an installation space for an auxiliary valve and to facilitate installation work of the auxiliary valve and connection work of a hydraulic hose in a short time. <P>SOLUTION: In a construction machine including a control valve 11 for controlling the supplying/discharging of an pressurized oil from a hydraulic pump to/from a hydraulic actuator and a combined-circuit dedicated auxiliary valve 12 connected to the control valve 11 through the hydraulic hose 23 for performing particular works including a crash work or the like, a bracket 16 is secured to the control valve 11 with bolts 18, and the combined-circuit dedicated auxiliary valve 12 is secured to the bracket 16 with bolts 22. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a reserve valve installation structure in a construction machine, and more particularly to a reserve valve installation structure in a construction machine in which a reserve valve for performing special work is connected to a control valve.

  Conventionally, a construction machine such as this type of hydraulic excavator has an upper swing body mounted on a lower traveling body so that the upper swing body can pivot, and a boom, an arm and a bucket on the upper swing body, and a hydraulic actuator such as a boom cylinder for driving them. Is installed. The hydraulic actuator is configured to perform excavation work by the bucket by controlling supply and discharge of pressure oil from a hydraulic pump via a control valve.

By the way, in order to perform special work such as crushing work other than excavation work, a special working tool (preliminary attachment) such as a crushing tool may be attached to the tip of the arm instead of the bucket. And in order to form the hydraulic circuit for performing the said special work, the reserve valve only for special work is mounted in the construction machine other than the said control valve (refer patent document 1).
JP-A-8-199632

  In the above prior art, the spare valve is disposed side by side on the side of the control valve, and the control valve and the spare valve are connected by a hydraulic hose. Therefore, in addition to the installation space (installation area) for the control valve, it is necessary to separately secure an installation space for the spare valve in an empty space or attachment on the side of the control valve, inside or outside the upper. As a result, the installation space increases by the amount for the spare valve, making it difficult to mount the spare valve in a limited installation space.

  Further, since the side of the control valve is generally narrow in space, it is difficult to perform the installation work of the spare valve and the connection work of the hydraulic hose to the spare valve, which requires a lot of labor and time.

  Therefore, there is a technical problem to be solved in order to be able to omit the installation space for the spare valve and to easily and quickly perform the spare valve installation work and the hydraulic hose connection work. Aims to solve this problem.

  The present invention has been proposed to achieve the above object, and the invention according to claim 1 is a control valve for controlling supply and discharge of pressure oil from a hydraulic pump to a hydraulic actuator, and a hydraulic hose for the control valve. A spare valve installation structure in a construction machine comprising a spare valve for performing special work such as crushing work connected via a bracket, and a bracket is fastened and fixed on the control valve by a bolt. A spare valve installation structure in a construction machine is provided in which the spare valve is fastened and fixed by a bolt.

  According to this configuration, the spare valve is mounted on the control valve via the bracket. Therefore, since the spare valve is installed using an empty space on the control valve, it is not necessary to separately secure a space for installing the spare valve on the side of the control valve.

  The invention according to claim 2 provides the spare valve installation structure in the construction machine according to claim 1, wherein the hose connection part of the spare valve is arranged directly above the hose connection part of the control valve. To do.

  According to this configuration, since the hose connection portion of the spare valve is located immediately above the hose connection portion of the control valve, the length of the hydraulic hose is reduced to the minimum necessary.

  According to the first aspect of the present invention, even if the space is limited, the spare valve can be compactly mounted on the control valve via the bracket, and an occupied space for installing the spare valve becomes unnecessary. Further, since the spare valve is fastened and fixed to the bracket on the control valve, the spare valve can be easily installed, removed, and replaced.

  The invention according to claim 2 reduces the material cost of the hydraulic hose in addition to the effect of the invention according to claim 1 because the length of the hydraulic hose connecting the spare valve and the control valve is reduced to the necessary minimum. can do. In addition, since the hose connection portion of the spare valve is located immediately above the hose connection portion of the control valve, the workability of connecting the hydraulic hose to both the spare valve and the control valve is improved.

  In order to achieve the purpose of enabling the spare valve installation space and the hydraulic hose connection operation to be performed easily and quickly, the present invention can reduce the installation space of the spare valve. In a spare valve installation structure in a construction machine, comprising a control valve for controlling supply and discharge of a hydraulic actuator, and a spare valve connected to the control valve via a hydraulic hose for performing special work such as crushing work, A bracket is fastened and fixed on the control valve by bolts, and the spare valve is fastened and fixed on the bracket by bolts.

  A preferred embodiment of the present invention will be described below with reference to FIGS. FIG. 1 shows a hydraulic excavator 1 as a construction machine according to the present embodiment. As shown in the figure, an upper swing body 4 is mounted on the lower traveling body 2 via a swing mechanism 3, and a boom 5, an arm 6, and a bucket 7 that can be turned up and down are mounted on the upper swing body 4. In addition, hydraulic actuators such as a boom cylinder 8, an arm cylinder 9, and a bucket cylinder 10 that drive these are mounted.

  The hydraulic actuators such as the boom cylinder 8, the arm cylinder 9 and the bucket cylinder 10 are driven by controlling supply / discharge of pressure oil from a hydraulic pump (not shown) via a control valve 11 shown in FIG.

  The hydraulic excavator 1 according to the present embodiment can replace a special work tool 7a such as a crushing machine instead of the bucket 7 at the tip of the arm 6 in order to perform special work such as crushing work other than excavation work. Can be installed.

  Then, in order to form a hydraulic circuit for performing special work, the upper swing body 4 is equipped with a special work valve (hereinafter referred to as “spare valve dedicated to the combined circuit”) 12 shown in FIG. The combined circuit dedicated spare valve 12 is used by being connected to the control valve 11 installed on the upper surface of the front part of the upper swing body 4.

  FIG. 2 shows an installation example of the spare valve 12 dedicated to the combined circuit. The spare valve 12 for exclusive use of the combined circuit is disposed by effectively utilizing the empty space on the control valve 11. In the figure, a control valve 11 is fixed on a gantry 13, and an upper surface portion 14 of the control valve 11 has a horizontal flat surface.

  As shown in FIG. 3, screw holes 15, 15... For fixing the bracket are opened at a plurality of predetermined locations on the upper surface portion 14 of the control valve 11. Further, a bracket 16 for fixing a spare valve is mounted on the upper surface portion 14 of the control valve 11, and the bracket 16 has two short legs 17 and 17. Further, the short leg portions 17, 17 are fastened and fixed by bolts 18, 18... Screwed into the respective screw holes 15, 15.

  A long leg portion 19 for positioning is provided on the lower left side of the bracket 16, and the long leg portion 19 hangs down in contact with the side surface (the left side surface in FIG. 2) of the control valve 11. The bracket 16 is fixed at a normal position by bringing the inner side surface of the long leg portion 19 into surface contact with the side surface of the upper portion of the control valve 11.

  Further, as shown in FIG. 4, screw holes 21, 21,... For fixing the valve are opened at a plurality of predetermined locations on the upper surface portion 20 of the bracket 16. The combined circuit dedicated spare valve 12 is fastened and fixed by bolts 22, 22... Screwed into the screw holes 21, 21.

  Further, the combined circuit dedicated spare valve 12 and the control valve 11 are connected via a hydraulic hose 23. That is, the lower end portion 24 of the hydraulic hose 23 is connected and fixed to a hose connection portion 25 provided on one side of the control valve 11, and the upper end portion 26 of the hydraulic hose 23 is one of the combined circuit dedicated spare valve 12. The hose connection part 27 provided on the side surface is connected and fixed. The hose connection 27 on the side of the combined circuit dedicated spare valve 12 is disposed immediately above the hose connection 25 on the control valve 11 side.

  Next, the installation procedure of the combined circuit dedicated spare valve 12 according to this embodiment will be described in detail. First, the bracket 16 is placed on the upper surface portion 14 of the control valve 11, and the bracket 16 is positioned at a predetermined position on the upper surface portion 14. In this case, the bracket 16 is fixed at the normal position by bringing the inner side surface of the long leg portion 19 of the bracket 16 into surface contact with the upper side surface of the control valve 11.

  Thereafter, the leg portions 17 and 17 of the bracket 16 are fixedly fastened to the control valve 11 by bolts 18 that are screwed into the respective screw holes 15 on the control valve 11 side. A bracket 16 is installed at a predetermined position of the upper surface portion 14 of the bracket.

  Next, the combined circuit dedicated spare valve 12 is mounted on the upper surface portion 20 of the bracket 16, and the combined circuit dedicated spare valve 12 is fixed to a predetermined portion of the upper surface portion 20. In this case, the combined circuit dedicated spare valve 12 is fastened and fixed to the upper surface portion 20 of the bracket 16 by bolts 22, 22... Screwed into the screw holes 21, 21.

  Finally, the combined circuit dedicated spare valve 12 and the control valve 11 are connected by a hydraulic hose 23. That is, the lower end portion 24 of the hydraulic hose 23 is connected and fixed to the hose connection portion 25 on the control valve 11 side, and the upper end portion 26 of the hydraulic hose 23 is connected and fixed to the hose connection portion 27 on the spare valve 12 for exclusive use of the combined circuit. . Thus, the installation work of the spare valve 12 for exclusive use of the combined circuit is completed.

  As described above, according to the present invention, the combined circuit dedicated spare valve 12 is mounted on the control valve 11 via the bracket 16. Accordingly, the spare valve 12 for exclusive use of the combined circuit is installed by effectively using the empty space on the control valve 11. Thus, even when the space for installing the valve is narrow, the spare valve 12 dedicated to the combined circuit can be mounted compactly in the empty space on the control valve 11.

  Further, the combined circuit dedicated spare valve 12 is fastened and fixed to the bracket 13 on the control valve 11 by bolts 22, 22,..., So that the combined circuit dedicated spare valve 12 can be easily installed, removed, or replaced. Can do.

  In the present embodiment, the hose connection portion 27 of the combined circuit dedicated spare valve 12 is located directly above the hose connection portion 25 of the control valve 11, so that the hydraulic hose to the combined circuit dedicated spare valve 12 and the control valve 11 is used. 23 can be more easily performed.

  Furthermore, since the length of the hydraulic hose 23 that connects the combined circuit dedicated spare valve 12 and the control valve 11 can be shortened to the minimum necessary, the material cost of the hydraulic hose can be greatly reduced.

  It should be noted that the present invention can be variously modified without departing from the spirit of the present invention, and the present invention naturally extends to the modified ones.

1 is a side view of a hydraulic excavator as a construction machine according to an embodiment of the present invention. The side view which shows the principal part of the preliminary | backup valve installation structure which concerns on one Example. The top view which shows the upper surface part of the control valve which concerns on one Example. The top view which shows the upper surface part of the bracket which concerns on one Example.

1 Excavator (construction machine)
4 Upper revolving structure 11 Control valve 12 Preliminary valve 16 for combined use circuit Bracket 23 Hydraulic hose 25 Hose connection 27 Hose connection

Claims (2)

In a construction machine comprising a control valve for controlling supply and discharge of pressure oil from a hydraulic pump to a hydraulic actuator, and a spare valve connected to the control valve via a hydraulic hose for performing special work such as crushing work In the spare valve installation structure,
A spare valve installation structure in a construction machine, wherein a bracket is fastened and fixed on the control valve by a bolt, and the spare valve is fastened and fixed on the bracket by a bolt.   2. The preliminary valve installation structure in a construction machine according to claim 1, wherein the hose connection portion of the spare valve is disposed immediately above the hose connection portion of the control valve.

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