JP4475241B2 - Construction machine upper frame - Google Patents

Description

  The present invention relates to an upper frame of a construction machine such as a hydraulic excavator or a dismantling machine configured by diverting the excavator.

  The background art will be described taking as an example a hydraulic excavator or a dismantling machine configured by exchanging work attachments of a hydraulic excavator.

  In FIG. 4, reference numeral 1 denotes a lower traveling body that travels by left and right crawlers 1 a (also shown in FIG. 5), and 2 is an upper swinging body that is rotatably mounted on the lower traveling body 1 via a swing bearing 3 These constitute the base machine 4, and a work attachment (not shown) is attached to the upper swing body 2 of the base machine 4.

  In FIG. 4, 5 is an upper frame serving as a base of the upper swing body 2, 6 is a cabin mounted on the left side of the front portion of the upper frame 5, and 7 is a counterweight attached to the rear end portion of the upper frame 5. .

  FIG. 5 shows the overall configuration of the upper frame 5.

  The upper frame 5 includes a center section A located in the center in the vehicle width direction and left and right side decks B and C provided adjacent to the center section A. A work attachment is provided at the front of the center section A. The counterweight 7 is mounted at the rear, the cabin 6 is mounted on the left side deck B, and the devices are mounted on the right side deck C, respectively.

  In FIG. 5, 8 and 8 are a pair of vertical plates vertically attached to the left and right sides of the upper surface as main components of the center section A.

  The structure of the right side deck C will be described with reference to FIGS. FIG. 6 is an enlarged view of the circled portion in FIG. 5, that is, an enlarged view of the joint portion of the end frame 9, the lateral frame 10, and the under cover 11, and FIG.

  The right side deck C, as a component, is an end frame provided in the front-rear direction at the outer end in the deck width direction (the C-shaped cross section as shown in FIG. 7 may be referred to as a C tube). 9), a horizontal frame 10 provided in the left-right direction with the right end in contact with the end frame 9, and an under cover 11 that closes the opening defined by these ends and the horizontal frames 9, 10. Yes.

  The horizontal frame 10 is formed in a cross-sectional Z shape having a bent portion 10b on the lower end side of the body portion 10a having an inverted L-shaped cross section, and a frame gap 12 is formed between the end frame 9 and the right end of the bent portion 10b. In this state, the main body portion 10a is joined to the horizontal frame 9 (see FIGS. 6 and 7).

  In FIG. 7, reference numeral 13 denotes a slit provided at the right end of the main body portion 10 a for bending the bent portion 10 b, and the frame gap 12 is formed with a width dimension substantially equal to the width of the slit 13.

  On the other hand, the under cover 11 is attached to the horizontal frame 10 or the like by bolting via a mounting seat (not shown). In this case, since the under cover 11 is heavy, as a device for facilitating the mounting work, a long hole-like notch provided on one end side of the cover 11 is hooked and supported on the bolt, and the other end side is bolted in this state. Therefore, the cover gap 14 is formed between the end frame 9 and the frame gap 12 so as to be continuous with the frame gap 12 in the front-rear direction as shown in the figure.

  On the other hand, a harness H as an electrical wiring for a device mounted on the right side deck C is installed across the bent portion 10b and the end frame 9 of the horizontal frame 10 so as to cross the frame gap 12 from side to side.

The configuration of the upper frame is shown in, for example, Patent Document 1, but there is no particular point in Patent Document regarding the point where the gaps 12 and 14 are formed, the point where the harness H is provided, and the like.
Japanese Utility Model Publication No. 62-185758

  In the construction machine having the lower traveling body, particularly the illustrated crawler type lower traveling body 1, the rod-shaped body 15 such as a reinforcing bar biting into the lower traveling body 1 is shown on the right side during traveling as shown in FIGS. There is a case where it goes around the lower surface side of the deck C, penetrates the cover gap 14 and enters the upper surface side of the right side deck C.

  In this case, in the conventional structure, the cover gap 14 and the frame gap 12 in front of the cover gap 14 are continuous, and the harness H is installed across the frame gap 12. Moved into the frame gap 12 and the harness H could be cut or damaged.

  Conventionally, as a countermeasure against this point, means for attaching a rubber seal in a state in which the cover gap 14 and the frame gap 12 are closed has been taken. However, this increases the material cost and assembly cost, and also causes deterioration and damage of the rubber seal. There was a difficulty in the durability of the protective function.

  Accordingly, the present invention provides an upper frame of a construction machine that can reliably protect a harness from an intruder, is low in cost, and has high durability.

  According to the first aspect of the present invention, a side deck is provided adjacent to the side of the center section where the working device is attached to the front part, and the side deck is provided in the front-rear direction at the outer end in the deck width direction. An end frame that is joined to the end frame in a state where a frame gap is formed on the end frame, and an under cover that closes an opening defined by the end and the side frames. Is attached with the frame gap and a cover gap continuous in the front-rear direction between the end frame and the harness crossing the frame gap between the horizontal frame and the end frame. In an upper frame of a construction machine that is installed straddling, the erosion that penetrates through the cover gap from below to one end of the horizontal frame. Block portion that blocks the object with respect to the harness, and is provided in a state of disconnecting the continuous of the frame gaps and cover the gap.

  According to a second aspect of the present invention, in the configuration of the first aspect, the block portion is formed by projecting a part of one end side of the horizontal frame toward the end frame side.

  According to the present invention, since the block portion is provided on one end side of the horizontal frame in a state where the frame gap and the cover gap are cut off, the harness can be cut by installing the harness on the side protected by the block portion. And damage can be reliably prevented.

  In addition, it is only necessary to provide a block portion on one end side of the horizontal frame, and this block portion can be a rigid body with high durability, so the cost can be significantly lower than the conventional rubber seal structure, The protective function can be secured semipermanently.

  In particular, according to the second aspect of the invention, the block portion is formed by integrally providing the projecting portion extending toward the end frame on one end side of the horizontal frame, that is, a part of the horizontal frame is bent with the block portion. Therefore, the cost can be further reduced as compared with a case in which a separately molded block material is retrofitted to the horizontal frame by welding or the like.

  An embodiment of the present invention will be described with reference to FIGS.

  In the embodiment, the same parts as those in the conventional structure shown in FIGS.

1 corresponds to FIG. 6, and FIG. 2 corresponds to FIG. As shown in both figures,
(i) The right side deck C is provided with an end and horizontal frames 9 and 16;
(ii) The under cover 11 is provided so as to cover the opening defined by the frames 9 and 16;
(iii) The point that the cover gap 14 is formed between the under cover 11 and the end frame 9 is the same as the conventional structure shown in FIGS.

  The horizontal frame 16 is basically formed in a Z-shaped cross section having a bent portion 16b on the lower end side of the body portion 16a having an inverted L-shaped cross section, similar to the conventional horizontal frame 10, and the end frame 9 and the bent portion 16b. The main body portion 16a is joined to the end frame 9 in a state in which the frame gap 17 is formed between the right end of the frame.

  In this embodiment, a tongue-like block portion 18 that protrudes toward the end frame 9 (right side) is provided at the bent portion 16b of the horizontal frame 16.

  The block portion 18 is formed by extending a bent end side portion to the right side, and the block portion 18 cuts off the continuation of the frame gap 17 and the cover gap 14 in a state where the horizontal frame 16 is joined to the end frame 9. It becomes a state.

  FIG. 3 shows a manufacturing process of the horizontal frame 16. The lower part of the figure is obtained by cutting the broken line portion at one end of the rectangular horizontal frame member 16 'shown in the upper part of FIG. 3 (see the middle part of the figure) and bending the whole along the folding lines (b) and (c) indicated by the one-dot chain line. The horizontal frame 16 with the block part 18 is manufactured as shown in FIG.

  2 and 3, reference numeral 19 denotes a slit provided at the right end of the main body portion 16a for bending the bent portion 16b.

  As shown in FIGS. 1 and 2, the harness H is installed across the horizontal frame bent portion 16 b and the end frame 9 along a route passing in front of the block portion 18.

  According to this configuration, even if the rod-like body 15 such as a reinforcing bar penetrates the cover gap 14 from below and enters the upper surface side of the right side deck and further moves forward in the cover gap 14, the rod-like body 15 is attached to the harness H. Can be blocked by the block portion 18 and further advancement can be prevented, so that there is no possibility that the harness H is damaged or cut by the rod-like body 15 as in the prior art.

  In addition, since the block portion 18 is formed by partially projecting one end side of the horizontal frame bent portion 16b toward the end frame 9 side, compared with a structure in which the entire gap is closed with a rubber seal, component cost and assembly are reduced. Cost is much cheaper.

  Further, since the block portion 18 itself is a part of the horizontal frame 16 and has high strength and durability, there is little risk of damage or deterioration like a rubber seal, and the harness protection function can be ensured semipermanently.

  By the way, it is most preferable that the block portion 18 is integrally formed as a part of the horizontal frame bent portion 16b as in the above embodiment, but it is retrofitted, that is, another block material (plate material or the like) is welded to the bent portion 16b. You may take the structure attached by. Even in this case, it is advantageous in terms of cost and durability as compared with the rubber seal structure.

  Moreover, in the said embodiment, although the right side deck C was illustrated as an application object, this invention is applicable also to the left side deck B as needed.

It is a fragmentary top view of the upper frame concerning embodiment of this invention. It is a perspective view of the part shown in FIG. It is a figure for demonstrating the manufacture process of the horizontal frame which comprises an upper frame. It is a schematic side view of a hydraulic excavator and a base machine of a dismantling machine configured by diverting it. It is a schematic plan view of a conventional upper frame. FIG. 6 is an enlarged view of a portion in FIG. 5. It is a perspective view of the same part.

Explanation of symbols

A Center section C Right side deck 9 End frame 11 Under cover 14 Cover gap H Harness 15 Rod (Intruder)
16 Horizontal frame 16a Body part 16b Bending part 17 Frame gap 18 Block part

Claims (2)

  A side deck is provided adjacent to the side of the center section where the work device is attached to the front, and as a component of this side deck, an end frame provided in the front-rear direction at the outer end in the deck width direction, and one end side A horizontal frame joined to the end frame in a state where a frame gap is formed, and an under cover that closes an opening defined by the end and the horizontal frame. The under cover is connected to the end frame. A construction machine that is attached in a state where a gap between the frame and the cover that is continuous in the front-rear direction is formed, and a harness is installed across the side frame and the end frame in a state that crosses the frame gap. In the upper frame, an intruder that penetrates through the cover gap from below to the one end side of the horizontal frame is transferred to the harness. Block unit to block against, the upper frame of the construction machine, characterized in that provided in a state of disconnecting the continuous of the frame gaps and cover the gap.   2. The upper frame of a construction machine according to claim 1, wherein a block portion is formed by projecting a part of one end side of the horizontal frame toward the end frame side.

Images