JP2009068172A - Controller arrangement structure of working machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a structure which enables a controller to be arranged in a place hardly allowing access from the outside without being affected by heat. <P>SOLUTION: The controller 3 is arranged on the backside of a horizontal plate 1 for reinforcing a bracket 2 for supporting a base end member of a front structure. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a structure when a controller is arranged in a work machine.

  In a work machine provided with a front structure, equipment is controlled by various controllers. These controllers are arranged at appropriate positions in the cab and the hood. For example, in patent document 1, as shown in FIG. 3, it arrange | positions under the driver's seat 90 in a cab (a controller is 3).

JP 2000-96609 (FIG. 3)

  Since the controller is responsible for controlling the equipment, it is preferable to have a location that is easy to manage and blocks access from the outside. The location of the controller is preferably in the cab. There are restrictions. For this reason, a controller important for the vehicle (for example, a controller for vehicle control) is preferentially disposed in the cab, but other controllers are disposed in the hood cover outside the cab.

  However, depending on the location, the hood cover receives heat from the engine, etc., so it must be placed in a space that is not affected by heat, and such a space is not necessarily accessible from the outside. It will not be limited. If the external access is easy, there is a possibility that a device to be controlled may fail due to mischief, and there is also a risk of theft (for example, when an arranged controller targets an immobilizer). On the other hand, if the arrangement space is considered with priority given to the difficulty of external access, it will be necessary to provide a separate heat shield structure, resulting in an extra cost.

  The present invention was devised in view of the above problems of the prior art, and is intended to provide a structure in which a controller is arranged in a place where there is no influence of heat and access from the outside is not easy. It is.

  For this reason, the controller arrangement structure of the work machine according to the present invention is characterized in that the controller is arranged on the back surface of the horizontal plate that reinforces the bracket for supporting the front structure base end member.

  Here, the horizontal plate is a reinforcing plate that reinforces a pair of vertical plates that form a bracket that supports a support shaft of a front structure base end member (mostly a boom). Around the bracket where the horizontal plate is arranged, a front structure base end member is arranged on the front and the upper side, a cab is arranged on the side, and a hood cover is arranged on the other side and the rear side. It becomes a very difficult place to access. On the other hand, it is a space that is not affected by the heat of the engine or the like. Therefore, the controller disposed on the back side of the horizontal plate is not affected by heat and there is no fear of access from the outside. Further, since it is disposed on the back side of the horizontal plate, it is sufficiently protected from raindrops and dust.

  According to the arrangement of the controller according to the present invention, there is no possibility of the controller being tampered with since it is not affected by heat and is difficult to access from the outside. In addition, the controller is protected from rain and dust. In addition, since the space where the installation of the device is not expected is used, an empty space is created in the hood cover that has been used conventionally, and there is an advantage that the space for installing other devices can be secured.

  An example of a specific form according to the present invention will be described with reference to FIG. The following example is an example applied to a hydraulic excavator that is a work machine. Note that the following examples are merely examples, and it is natural that the present invention is not limited to the following configurations, such as applied machines and specific forms.

  FIG. 1 is a view of a revolving frame 5 of a small revolving hydraulic excavator to which the present invention is applied as viewed from the rear side, and the appearance of the completed body is shown in FIG.

  A bracket 2 that pivotally supports the boom 4 serving as a base end member of the front structure is disposed at substantially the center on the revolving frame 5. The bracket 2 is composed of a pair of vertical plates 20, and a boom support shaft 6 is suspended at the upper end thereof. Below the boom support shaft 6, a distance plate 1 (horizontal plate) that reinforces the bracket 2 is attached obliquely so as to connect both the vertical plates 20. In this embodiment, an immobilizer controller 3 is fixed to the back surface of the distance plate 1. The wiring 30 of the controller 3 runs along the inside of the bracket vertical plate 20 from the back side of the distance plate 1 and is directed toward the cab 7 side.

  As shown in FIG. 2, the bracket 2 described above has a boom 4 on the front side, a cab 7 on one side, and a hood cover 8 on the other side and rear side (however, the rearmost side) The counterweights 80) are respectively arranged, and the four sides are surrounded by the members 4, 7, and 8 at the deepest part of the upper swing body. Therefore, in the completed vehicle form, it becomes extremely difficult to access the controller 3 disposed on the back surface of the distance plate 1, and an outsider cannot access the controller 3 and stop the function of the immobilizer. First it becomes impossible. Further, the distance plate 1 becomes an umbrella and is protected from raindrops and dust, and the risk of failure due to them is reduced. Therefore, in the hydraulic excavator to which this embodiment is applied, the immobilizer operates properly and theft can be sufficiently prevented.

  In some vehicles (including those other than hydraulic excavators), the front structure base end member support bracket is located on the front side of the revolving frame. The front structure is located on the front and upper side, which is the most accessible direction, in the same direction as the hydraulic excavator of the above-mentioned form. However, it will be difficult to access from outside.

  The present invention can be widely applied to work machines including a front structure.

It is explanatory drawing of the turning frame of the upper turning body of a hydraulic excavator, showing the example of the structure concerning the present invention. It is an external view of the hydraulic excavator completed body in which the turning frame of FIG. 1 is used, (a) is a plan view, and (b) is a side view. It is explanatory drawing of the form (it is disclosed by Unexamined-Japanese-Patent No. 2000-96609) by which a controller is arrange | positioned under the driving seat.

Explanation of symbols

1 Distance plate (horizontal plate)
2 Boom support bracket
3 Controller
4 Boom (base structure base end member)
5 Swivel frame
6 Support shaft
7 cab

Claims (1)

  A controller arrangement structure for a work machine, characterized in that a controller is arranged on the back surface of a horizontal plate that reinforces a bracket for supporting a front structure base end member.

Images