JP2008106430A - Crawler type revolving working machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a crawler type revolving working machine having a step arrangement structure facilitating going up to and down from a super structure in the crawler type revolving working machine comprising the super structure on a crawler type lower structure, regardless of the placed position of a machine body, the revolving position of the super structure, or the like. <P>SOLUTION: The crawler type revolving working machine 2 comprises the lower structure 4 having a lateral pair of traveling frames 10a, 10b wound with crawlers 12, and the super structure 6 revolvably mounted on the lower structure 4. The pair of traveling frames 10a, 10b respectively comprise one or more steps S for going up to and down from the super structure 6, at each of inner side faces M facing each other, and outer side faces N located outside the lower structure 4. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a crawler-type swivel working machine, and more particularly, to a crawler-type swivel working machine having a step arrangement structure that allows easy getting on and off an upper revolving body.

A crawler-type turning work machine such as a hydraulic excavator, in which an upper turning body is pivotably mounted on a lower traveling body having a crawler belt, is equipped with a cab, an engine room, a work device, and the like. . And the step which is a scaffold is provided in the outer side surface of the driving | running | working frame of a lower traveling body for boarding / alighting at the time of driving | running | working, a maintenance check, etc. to an upper revolving body (for example, refer patent document 1). .
JP-A-8-72615 (FIG. 1)

  The conventional crawler-type turning work machine has the following problems to be solved with respect to the steps for getting on and off as described above.

  This will be described with reference to FIG. That is, as shown in FIG. 4 (a), when there are wall surfaces, obstacles, etc. on both outer sides of the crawler track of a work machine in a narrow site such as a tunnel or a residential area, the step can be used. It is difficult to get on and off the upper swing body.

  As shown in FIG. 4 (b), when the work implement is placed on the trailer bed for transportation, the trailer has substantially the same width as the outer width of the track of the work implement. The height to the step becomes high, and the step cannot be used for getting on and off, and it is difficult to get on and off the upper swing body.

  As shown in FIG. 4 (c), even if both sides of the work implement are released for getting on and off, the upper turning body turning around the axis Z is positioned at an unspecified oblique turning position with respect to the lower traveling body. When using the step to get on and off the upper swing body, it may be difficult to reach the handle provided to the upper swing body to support the body and assist getting on and off. It becomes difficult.

  The present invention has been made in view of the above-mentioned facts, and its technical problem is that the crawler-type swivel working machine provided with the upper-part turning body on the crawler-type lower-part traveling body, It is an object of the present invention to provide a crawler-type turning work machine having a step arrangement structure that can be easily performed regardless of the placed position, the turning position of the upper turning body, and the like.

  According to the present invention, as a crawler-type turning work machine that solves the above technical problem, a lower traveling body having a pair of left and right traveling frames around which the crawler belt is wound, and an upper revolving body that is pivotably attached on the lower traveling body Each of the pair of traveling frames has a step for getting on and off one or more upper revolving bodies on each of the inner side surface facing each other and the outer side surface located outside the lower traveling body. A crawler-type turning work machine is provided.

  Preferably, the front surface of the cab located at the outer edge of the upper swing body is provided with a handle for assisting getting on and off the upper swing body using a step. The step on the inner surface of the traveling frame may be provided in the motor cover of the sprocket driving body provided on the traveling frame.

  In the crawler-type turning work machine configured in accordance with the present invention, each of the pair of traveling frames of the lower traveling body includes one or more steps for getting on and off the upper revolving body on the inner surface and the outer surface. Therefore, when it is difficult to get on and off the upper revolving structure from the side of the work implement, it is possible to easily get on and off the upper revolving structure by using the steps provided on the inner surface of the traveling frame. .

  Hereinafter, a crawler-type turning work machine configured in accordance with the present invention will be described in more detail with reference to the accompanying drawings illustrating a preferred embodiment of a hydraulic excavator that is a typical crawler-type turning work machine.

  A description will be given with reference to FIG. The hydraulic excavator generally indicated by reference numeral 2 includes a lower traveling body 4 and an upper revolving body 6 that is mounted on the lower traveling body 4 so as to be pivotable about a vertical axis Z. The upper swing body 6 includes a cab 6a, an engine room 6b, a work arm device 6c, and the like as a driver's cab.

  The lower traveling body 4 includes a lower traveling body frame 8, and the lower traveling body frame 8 includes a pair of left and right traveling frames 10a and 10b formed substantially symmetrically. A crawler belt 12 is wound around each of the traveling frames 10a and 10b so as to be driven.

  2 will be described with reference to FIG. A pair of traveling frames 10a and 10b of the lower traveling body frame 8 are attached to both sides of a center frame 10c that supports the upper revolving body 6 so as to be able to swivel. The traveling frames 10a and 10b have a bifurcated mounting portion F of an idler on which one side (right side in FIG. 2) of the longitudinal direction X (right and left in FIG. 2) is wound to guide the rotation of the crawler belt 12. The crawler belt 12 is wound on the other side (left side in FIG. 2), and a mounting portion R extending from the center frame 10c side is provided for the sprocket drive body 16 that drives its rotation. The attachment portion R includes a detachable motor cover 18 on the inner surface M side of the traveling frame. Between the attachment part F and the attachment part R of travel frame 10a, 10b, it forms in the substantially rectangular cross section.

  Each of the pair of traveling frames 10a and 10b has a step S having substantially the same shape for getting on and off the upper swing body 6 on each of the inner surface M and the outer surface N located outside the lower traveling body 4 facing each other. Two are provided on the attachment portion F side and the attachment portion R side in the longitudinal direction X.

  The shape of step S may be a well-known one that can function as a scaffold. For example, a relatively thick steel strip is bent at both ends in the longitudinal direction in the same direction, and each open end is welded to the outer surface N or the inner surface M. For example, the upper edge should have anti-slip irregularities.

  The installation position of the step S in the longitudinal direction X is set to a position where the upper swing body 6 can be easily boarded and exited according to the size of the machine body of the work machine (hydraulic excavator 2). In the embodiment, the step S of the inner side surface M and the outer side surface N is disposed at substantially the same position, but the mounting portion F side of the inner side surface M of the traveling frame 10a and the mounting portion of the inner side surface M of the traveling frame 10b. The step S on the R side is related to the position of the cab 6a of the upper swing body 6 and is related to the position of the cab 6a when the upper swing body 6 is swung. It is installed at different positions.

  The cab 6 a provided in the upper swing body 6 includes a handle 14 that extends in the horizontal direction to assist in getting on and off the upper swing body 6 using the step S at the lower part of the front surface located at the outer edge of the upper swing body 6. ing.

The effect of the crawler-type turning work machine 2 as described above will be described.

  In the crawler-type turning work machine 2 configured according to the present invention, the pair of traveling frames 10a and 10b of the lower traveling body 4 has steps for getting on and off the one or more upper revolving bodies 6 on the inner surface M and the outer surface N, respectively. S is provided. Therefore, as described with reference to FIG. 4, when it is difficult to get on and off the upper swing body 6 from the side of the work implement 2, the step S provided on the inner surface M of the traveling frames 10 a and 10 b should be used. Thus, it is possible to easily get on and off the upper swing body 6.

  In addition, a handle 14 is provided on the front surface of the cab 6 a located at the outer edge of the upper swing body 6 to assist in getting on and off the upper swing body 6 using step S. Therefore, it is possible to more easily get on and off the upper swing body 6 using the handle 14 and the step S.

  The present invention has been described in detail based on the embodiments. However, the present invention is not limited to the above-described embodiments, and various changes or modifications can be made within the scope of the present invention, for example, as described below. Is.

  In the embodiment of the present invention, two steps S for getting on and off the upper swing body 6 are provided on each of the inner side surface M and the outer side surface N of the pair of traveling frames 10a and 10b. There may be one each according to the size and form of the work implement. In addition, the number of the inner surface M and the outer surface N may be changed.

  The step S provided on the sprocket driving body 16 mounting portion R side of the inner side surface M of the pair of traveling frames 10a, 10b in the embodiment of the present invention is illustrated in accordance with the size and form of the crawler-type turning work machine. As shown by a two-dot chain line 2 in FIG. 3 and a solid line in FIG. 3, the motor cover 18 of the mounting portion R that is detachably attached by a bolt 20 may be provided. Since the motor cover 18 is detachable, the step S can be easily installed with the motor cover 18 removed.

  In the embodiment of the present invention, a horizontally extending handle 14 is provided at the lower portion of the front surface of the cab 6a located at the outer edge of the upper swing body 6 to assist in getting on and off the upper swing body 6 using step S. ing. The handle may not necessarily be horizontal as long as it assists getting on and off, and may be vertically attached to a column on the front surface of the cab 6a.

BRIEF DESCRIPTION OF THE DRAWINGS (a) The perspective view which looked at the crawler-type turning working machine comprised according to this invention from diagonally forward, (b) The structure explanatory drawing seen from upper direction. The structure explanatory top view of the principal part of the lower traveling body of the crawler-type turning working machine shown in FIG. The enlarged perspective view which showed the part of the motor cover in which the step was installed seeing in the Y arrow direction of FIG. Explanatory drawing of the problem of the conventional crawler-type turning work machine.

Explanation of symbols

2: Excavator (Crawler-type turning work machine)
4: Lower traveling body 6: Upper revolving body 6a: Cab 10a, 10b: Traveling frame 12: Crawler belt 14: Handle 16: Sprocket drive 18: Motor cover M: Inner surface N: Outer surface S: Step

Claims (3)

A lower traveling body having a pair of left and right traveling frames wound with crawler belts, and an upper revolving body attached to the lower traveling body so as to be freely rotatable;
Each pair of travel frames
Steps for getting on and off one or more upper revolving units are provided on each of the inner side surface facing each other and the outer side surface located outside the lower traveling unit,
A crawler-type turning work machine characterized by that. The steps on the inner surface of the running frame
Provided in the motor cover of the sprocket drive body provided on the traveling frame,
The crawler-type turning work machine according to claim 1. The front of the cab located at the outer edge of the upper swing body is provided with a handle that assists in getting on and off the upper swing body using steps.
The crawler-type turning work machine according to claim 1 or 2, wherein

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