JP2013068027A - Fireproof wall structure for construction machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve assemblability and to reduce costs by simplifying a panel configuration of a fireproof wall and facilitating assembly to a pump-side space.SOLUTION: In a construction machine, a hydraulic pump 35 is provided at the left side of an engine 28 accommodated within an engine room 27, and a fireproof wall is provided in a pump-side space S between a left-side panel 30 and the engine 28. In the construction machine, a fireproof panel 38 is provided in the state where the pump-side space S is bisected vertically while making the distal end thereof proximate to an inner surface of an intermediate part of a left-side panel 30 in a height direction, and a fireproof wall 37 is comprised of the fireproof panel 38 and the left-side panel 30.

Description

  The present invention relates to a fire wall structure for preventing oil scattered from a hydraulic pump from falling on a high-pitched part such as an engine muffler or an exhaust tube in a construction machine such as an excavator.

  The background art will be described using an excavator as an example.

  As shown in FIG. 4, the excavator is configured such that an upper swing body 2 is rotatably mounted on a crawler type lower traveling body 1, and a work attachment 3 is mounted on the upper swing body 2.

  The upper swing body 2 includes an upper frame 4 as a base. A cabin 5 is provided on the front left and right sides of the upper frame 4 (usually on the left side, hereinafter described in this case), and a counterweight 6 is provided on the rear end. In addition to being installed, an engine room 7 is formed in front of the counterweight 6 behind the cabin 5, and an engine 8 as a power source is installed in the engine room 7.

  FIG. 5 is a schematic cross-sectional view of the device arrangement in the engine room 7 as seen from the back side.

  In this specification, the position of the cabin 5 is the left front part, and the direction of “front-rear” and “left-right” for the entire machine and each part with reference to this position.

  Further, for simplification of the drawings and description, illustrations and descriptions relating to the configuration of each part of the upper revolving structure that is not directly related to the present invention, equipment arrangement, and the like are omitted.

  The engine room 7 is formed such that the back surface is the counterweight 6 in FIG. 5, the top surface is the upper guard 9, the left and right side surfaces are covered with the left and right side panels 10 and 11, and the bottom surface is covered with the bottom plate 12. Is installed in the engine room 7 in the left-right direction.

  On the left and right sides of the engine 8 (described in the case of the right side), a heat exchanger 14 that performs a heat exchanging operation is provided between the fan 13 and the air sucked in from the outside by the rotation of the fan 13, while the opposite side. A hydraulic pump 15 is provided on the left side.

  In addition, an exhaust system muffler 16 and an exhaust tube (not shown) (hereinafter referred to as a high temperature portion) that are not shown are provided on the upper left side of the engine 8 and above the hydraulic pump 15.

  Further, oil from the hydraulic pump 15 (both the pump main body and the pump piping portion such as the high-pressure piping joint portion; the same applies hereinafter) enters the pump-side space S formed between the left panel 10 and the engine 8. A fire barrier 17 is provided to prevent the oil from falling on the high temperature part when leaked or scattered in a mist form (see Patent Document 1).

  Conventionally, the fire wall 17 has a structure in which a plate material is bent into an approximately L-shaped cross section as shown in FIG.

  Specifically, it consists of a lower wall 17a that crosses between the hydraulic pump 15 and the high temperature part in a gently inclined posture that rises to the left, and an upper wall 17b that rises vertically from the inclined tip of the lower wall 17a. The oil that scatters straight toward the high temperature part is blocked by the lower wall 17a, and the oil that goes around the left upper side from the hydraulic pump 15 and goes to the high temperature part is blocked by the upper wall 17b.

JP 2006-169849 A

  In the conventional fire wall structure, in order to configure the fire wall 17 by installing the L-shaped bent plate in the pump side space S as described above, based on the technical idea of blocking oil only by an independent plate material, Assembly work was difficult.

  In particular, in a small construction machine having a small width W of the pump side space S (distance between the pump side panel and the engine) W such as a mini excavator, this point becomes remarkable and the assemblability deteriorates.

  Moreover, since the whole area of the fire wall 17 became large, the cost was high.

  Therefore, the present invention provides a fire wall structure for a construction machine that can simplify the plate configuration, facilitate assembly in the pump side space, improve assembly, and realize cost reduction.

  As means for solving the above problems, in the present invention, an engine room is formed by a plurality of guard members including an upper guard that covers the upper surface and a side panel that covers the side surface, and the engine is accommodated in the engine room, A hydraulic pump is provided on one of the left and right sides, and the hydraulic pump is disposed in a pump side space formed between the engine and the pump side panel located on the hydraulic pump side among the side panels. In the fire wall structure of a construction machine that provides a fire wall that shields against the fire, the fire plate is in a state that the tip part is close to the inner surface of the intermediate part in the height direction of the pump side panel and the pump side space is divided into two. The fire barrier is configured by the fire barrier plate and the pump side panel.

  According to this configuration, since the fire wall is constituted by the fire plate and the pump side panel forming the engine room, in other words, since the pump side panel is used as a part of the fire wall, the fire plate is almost It can be configured as a flat plate.

  For this reason, as compared with the conventional structure in which the L-shaped plate is assembled, it is easy to assemble the fire wall into the pump-side space, and the assemblability can be greatly improved particularly in a small construction machine such as a mini excavator.

  In addition, since the area of the fire prevention plate can be reduced, the cost can be greatly reduced.

  In the present invention, upper guard legs for attaching the upper guard are erected on both the left and right sides in the engine room, and the tip of the fireproof plate is placed on the hydraulic pump side of the upper guard legs on the left and right sides. It is desirable to attach to the pump side upper guard leg located (Claims 2 and 3).

  According to this structure, in order to embody the structure of Claim 1 by attaching the front-end | tip part of a fire prevention board to the upper guard leg for attaching the upper guard which forms an engine room, in other words, attaching an upper guard leg to a fire prevention board Since it is also used as a member, it is not necessary to add a mounting member dedicated to the fireproof plate in the narrow pump side space, and the assemblability can be further improved.

  In this case, it is desirable that the upper guard leg on the pump side is erected at intervals on both the front and rear sides, and the front end portion of the fire protection plate is mounted across the upper guard legs on both the front and rear sides.

  In this way, by attaching the front end of the fire plate across the upper guard legs on both the front and rear sides, the fire plate and the upper guard legs can function as reinforcing members, and the strength of both can be increased together. It is possible to suppress vibration and shaking of the fire protection plate and the upper guard leg due to engine vibration and running vibration.

  According to the present invention, it is possible to simplify the plate structure of the fire wall, to facilitate the assembly to the pump side space, to improve the assemblability and to realize the cost reduction.

It is the typical sectional view which looked at the back side of the machine of the fire wall structure concerning the embodiment of the present invention. It is sectional drawing which expands and shows a fire wall structure concretely. It is a perspective view which shows a fire wall structure. 1 is a schematic side view of an excavator to which the present invention is applied. It is the FIG. 1 equivalent view which shows the conventional fire wall structure.

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

  In the embodiment, an excavator is applied to the background art.

  In the embodiment, the following points are the same as the prior art shown in FIGS.

  (i) The upper revolving unit is rotatably mounted on the crawler type lower traveling unit, and the excavator is configured by attaching the work attachment to the upper revolving unit.

  (ii) A cabin is installed on the front left and right sides of the upper frame as a base of the upper swing body (usually on the left side, hereinafter described in this case), and a counterweight is installed on the rear end. An engine room 27 is formed at the rear and in front of the counterweight, and an engine 28 as a power source is installed in the engine room 27.

  (iii) The engine room 27 is formed by covering the back with a counterweight, the upper surface with an upper guard 29, the left and right side surfaces with left and right side panels 30 and 31, and the bottom surface with a bottom plate 32, respectively. It is installed in the engine room 27 in the left-right direction.

  (iv) On the left and right sides of the engine 28 (described in the case of the right side), a heat exchanger 34 that performs a heat exchange action between the fan 33 and the air sucked from the outside by the rotation of the fan 33 is provided. The hydraulic pump 35 is provided on the opposite side (left side).

  (v) An engine exhaust system muffler 36 and an exhaust tube (not shown) (not shown) are provided on the upper left side of the engine 28 and above the hydraulic pump 35.

  (vi) In the pump side space S formed between the left panel 30 and the engine 28, oil leaks from the hydraulic pump 35 (both the pump main body and the pump piping portion such as the high pressure piping joint portion) in the form of a mist. The point provided with the fire wall 37 for preventing that oil falls on a high temperature part, when splashing.

  In the embodiment, the fire wall 37 includes a fire plate 38 and a pump side (left side) panel 30. This fire wall structure will be described in detail.

  As shown in FIGS. 2 and 3, a deck frame 39 is provided on the lower side of the left panel 30, and a pair of front and rear upper guard legs 40 and 40 for attaching the upper guard 29 are erected on the deck frame 39. Yes.

  2 and 3 show only the left side of the engine room directly related to the present invention.

  The upper guard legs 40, 40 are spaced apart from each other and are disposed close to the inner surface of the left panel 30, and the left and right ends of the upper guard 29 are attached to the upper ends of the upper guard legs 40, 40. .

The fire prevention plate 38 is formed in a substantially flat plate shape of a square, and above the hydraulic pump,
(I) The whole body is inclined gently to the left,
(II) One end portion (the end portion on the pump side; hereinafter, this is referred to as the base end portion, and the opposite side is referred to as the front end portion) is bent vertically to be an upper portion of the base end portion (engine side end portion) of the hydraulic pump 35 Close to the perimeter,
(III) The tip portion is provided in a state of being close to the inner surface in the height direction of the left panel 30 via the upper guard leg 40.

  As a means for attaching the fire prevention plate 38, a main attachment portion 41 is bent upward at almost the entire width in the front-rear direction at the front end portion of the fire prevention plate 38, and the main attachment portion 41 is bolted to the upper guard legs 40, 40. Has been.

  Further, as auxiliary mounting means, a front mounting member 42 and a rear mounting member 43 are mounted vertically and vertically on the front end of the fire protection plate 38 over the substantially entire length in the left-right direction, and on the rear end base end side of the fire protection plate 38, respectively. The front mounting member 42 is bolted to the front upper guard leg 40, and the rear mounting member 43 is bolted to a fixed portion (not shown) (for example, a bracket standing on the bottom plate 32).

  In FIG. 2, reference numeral 44 denotes a sound absorbing material provided in a gap between the upper guard legs 40, 40 and the left panel 30.

  In this way, the fire prevention plate 38 is spanned between the hydraulic pump 35 and the inner surface of the intermediate portion of the left panel 30 in a state where the pump side space S is divided into two parts up and down. 37 is configured.

  In other words, the fire wall 37 is configured using the left panel 30.

  According to this fire wall structure, since the fire plate 38 can be configured as a substantially flat plate as described above, the fire plate 38 can be assembled to the pump-side space S as compared with a conventional structure in which an L-shaped plate is assembled. In particular, the assembly of the fire wall 37 can be greatly improved in a small construction machine having a narrow pump-side space S such as a mini excavator.

  In addition, since the area of the fire prevention plate 38 can be reduced, the cost can be significantly reduced.

  Furthermore, in order to embody the above-described configuration by attaching the tip of the fire prevention plate 38 to the upper guard legs 40, 40 for attaching the upper guard 29 forming the engine room 27, in other words, the upper guard legs 40, 40 are fire-proofed. Since it also serves as a plate mounting member, it is not necessary to add a dedicated mounting member for the fireproof plate to the narrow pump-side space S, and the assemblability can be further improved.

  In this case, since the front end portion of the fire prevention plate 38 is mounted across the upper guard legs 40, 40 on both the front and rear sides, the fire prevention plate 38 and the upper guard legs 40, 40 function as reinforcing members to increase both strengths. In addition, vibrations and fluctuations of the fire protection plate 38 and the upper guard legs 40, 40 due to engine vibration and running vibration can be suppressed.

Other embodiments
(1) In the case of a machine not provided with the upper guard leg 40, a dedicated fire plate attaching member is provided near the inner surface of the left panel 30 as a means for mounting the tip of the fire plate 38 close to the inner surface of the left panel 30. May be.

  Or when taking the fixed panel structure which the left side panel 30 does not open and close, you may attach a fire prevention board front-end | tip part directly to the panel inner surface.

  (2) The present invention can be basically applied to the construction machine other than the shovel when the fire wall 37 is installed on the right side in the engine room 27 and to the construction machine other than the excavator.

27 Engine room 28 Engine 29 Upper guard 30 Left panel 35 Hydraulic pump S Pump side space 36 Muffler (high temperature part of the engine)
37 Fire wall 38 Fire plate 40, 40 Upper guard leg 41 Main attachment portion of the fire plate 42 Front attachment member of the fire plate 43 Rear attachment member of the fire plate

Claims (3)

  An engine room is formed by a plurality of guard members including an upper guard that covers the upper surface and a side panel that covers the side surface, the engine is accommodated in the engine room, a hydraulic pump is provided on one of the left and right sides of the engine, and the side panel Among them, a fire prevention of a construction machine in which a fire prevention wall that shields the hydraulic pump from a high temperature portion of the engine is provided in a pump side space formed between a pump side panel located on the hydraulic pump side and the engine. In the wall structure, the fire prevention plate is provided in a state where the tip portion is close to the inner surface of the intermediate portion in the height direction of the pump side panel and the pump side space is divided into two parts up and down, and the fire prevention plate and the pump side panel A fire barrier structure of a construction machine, characterized by comprising a fire barrier.   On the left and right sides of the engine room, upper guard legs for attaching the upper guard are erected in close proximity to the pump side panel, and the tip of the fire protection plate is connected to the left and right upper guard legs. 2. A fire barrier structure for a construction machine according to claim 1, wherein the fire guard wall structure is attached to a pump-side upper guard leg located on the hydraulic pump side.   3. The construction machine according to claim 2, wherein the pump-side upper guard leg is erected at intervals on both the front and rear sides, and the tip of the fire protection plate is mounted across the upper guard legs on both the front and rear sides. Fire wall structure.

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