JP2019127929A - Oil protection structure of work machine - Google Patents

Abstract

To prevent leaked oil or the like from being leaked out of a work machine even in the case that oil and the like are leaked out of component.SOLUTION: A work machine 1 having components installed on a top plate 11a of a frame 11 is constituted in such a way that said frame 11 is provided with an oil guard wall 21 vertically arranged from said top plate 11a at a position where an outer circumference of said component as seen from a top plan view and an inside part of said oil guard wall 21 is formed with an oil reservoir tank 20 having a bottom where said oil guard wall 21 is applied as a side wall. With this arrangement as above, oil and the like leaked out of the component are stored in the oil reservoir tank 20 formed on the frame 11, thereby it is possible to prevent leakage of the oil and the like out of the work machine.SELECTED DRAWING: Figure 2

Description

  The present invention relates to an oil-proof structure of a work machine, for example, in a sound-proof work machine in which components such as an oil-cooled compressor body and a drive source such as an engine and a motor for driving the compressor are housed in a sound-proof box. The present invention relates to an oil-proof structure for a work machine that can prevent leakage outside the machine by retaining the leaked oil in the machine even when oil such as lubricating oil or fuel leaks from the equipment.

  In working machines intended for outdoor use, etc., the components of the working machine are housed in a soundproof box composed of a frame that is a base on which the components are mounted and a bonnet covering the upper part of the frame for soundproofing. In general, the construction as a type work machine is carried out, and by thus housing the inside of the soundproof box, the component equipment is protected from wind and rain, and the noise generated with the operation of the work machine leaks out of the machine. Is preventing.

  As an example of a working machine configured as a soundproof type working machine as described above, the oil-cooled screw compressor has a compressor main body in which a pair of screw rotors composed of a male rotor and a female rotor that rotate in an engaged state are accommodated in a cylinder. By supplying lubricating oil into the working space when the screw rotor rotates in the cylinder and compresses the compressed gas, sealing, cooling, and lubrication can be performed between the rotors and between the rotor and the cylinder inner wall. It is configured as follows.

  Therefore, in such an oil-cooled screw compressor, in addition to the compressor main body as a component device, air such as a receiver tank or a separator for separating the lubricating oil from the compressed gas discharged together with the lubricating oil from the compressor main body A liquid oil separator and a lubricating oil circulation system for introducing lubricating oil separated in the receiver tank into the working space of the compressor body after passing through the oil cooler and oil filter are formed. (See Patent Document 1).

  Thus, in the oil-cooled screw compressor, since lubricating oil is used to lubricate, cool and seal the compression acting space, it is necessary to periodically replace the deteriorated lubricating oil with new one.

  In the case of such lubricating oil replacement, in Patent Document 1 mentioned above, an oil pan is disposed on a frame below the oil drain provided in the oil tank (Patent Document 1 [0070]), or Attach an extension hose to the oil port, insert the end of this hose into an oil receptacle placed outside the machine (Patent Document 1 [0071]), open the valve provided at the bottom of the receiver tank in this state, The lubricating oil in the receiver tank is collected in the oil pan.

JP, 2015-7404, A

  As described above, when discharging the lubricating oil is started with the oil receiver placed on the frame of the soundproof box, when the discharging of the lubricating oil is vigorously started from the oil discharge port, the discharged lubrication is Oil can jump out of the pan and overflow onto the frame.

  In addition, if the pan moves from the lower side of the oil outlet due to the hand or tool hitting the oil pan while discharging the lubricating oil, the drained lubricating oil does not enter the pan and is placed on the frame of the soundproof box. It will flow out.

  Furthermore, even if the configuration is adopted in which the oil in the receiver tank is collected in an oil pan placed outside the machine by attaching an extension hose to the oil drain port, the screw of the extension hose is loosened. Improper installation may cause the lubricant to leak from the extension hose connection and flow out onto the frame, and if the extension hose is removed from the oil drain during recovery of the lubricant, lubrication is applied to the frame. The oil will drain directly.

  Then, the lubricating oil thus flowed out onto the frame leaks from the periphery of the frame to the outside of the frame, and falls below the frame through holes such as mounting holes of components provided in the frame, It contaminates the surrounding environment, such as contaminating the soil where the work equipment is installed.

  In the above description, although the case where the lubricating oil is recovered from the receiver tank of the oil-cooled screw compressor has been described as an example of the case where the lubricating oil leaks, the soundproof working machine is an engine driven type work In the case of an engine, the engine oil also needs to be replaced on a regular basis, and there is a risk that the lubricant may similarly leak when recovering the engine oil.

  In addition, the leakage of lubricating oil and other oils onto the frame of the soundproof box does not occur only when the lubricating oil is replaced; for example, in the case of an engine-driven work machine, damage to the fuel tank, oil hose Also, it may be caused by breakage of the fuel hose or slack of these connections, and even if the oil leaks due to these, it is necessary to similarly prevent the leakage to the outside of the machine.

  Therefore, according to the present invention, as described above, even if oils such as lubricating oil and fuel leak from the component equipment of the working machine mounted on the frame, the leaked oils leak out of the machine It is an object of the present invention to provide a working machine having an oil proof structure that can be stored on a frame so as to prevent

  Hereinafter, means for solving the problem will be described together with reference numerals used in the embodiment for carrying out the invention. This code is used to clarify the correspondence between the description of the claims and the description of the mode for carrying out the invention. Needless to say, it is used in a limited manner to interpret the technical scope of the present invention. Is not something

In order to achieve the above object, the oilproof structure of the work machine 1 of the present invention is:
In the work machine 1 in which components are mounted on the top plate 11a of the frame 11,
The frame 11 is provided with an oil barrier wall 21 standing upright from the top plate 11a at a position surrounding the outer periphery of the component device in plan view, and oil leaked from the component device inside the oil barrier wall 21 A bottomed oil receiving tank 20 having the oil-proof wall 21 as a side wall is formed to store the oil (claim 1).

  In the oil-proof structure having the above-described configuration, a bolt 23 for attaching the component device is provided on the top plate 11a of the frame 11 inside the oil-proof wall 21 with a hole in the top plate 11a by a method such as stud welding. It is preferable to attach without providing (claim 2).

  Furthermore, an oil-proof pan 22 having a bottom plate 221 and side walls 222 erected from the peripheral edge of the bottom plate 221 is placed on the frame 11, and the component equipment is mounted on the bottom plate 221 of the oil-proof pan 22. At the same time, the side wall 222 of the oil-proof pan 22 can be the oil-proof wall 21 (claim 3).

Alternatively, an oil-proof pan 22 having a bottom plate 221 provided with an insertion hole 223 for the bolt 23 and a side wall 222 erected from the periphery of the bottom plate 221 is placed on the frame 11. The component device is mounted on the bottom plate 221, and the side wall 222 of the oil-proof tray 22 is used as the oil-proof wall 21.
By providing a sealing material (31, 31 ′) that surrounds the outside of the insertion hole 223 and seals the interval δ1 between the bottom plate 221 of the oil-proof tray 22 and the top plate 11a of the frame 11. A liquid-tight bottom portion of the oil receiving tank 20 may be formed by the bottom plate 221 of the oil tray 22, the top plate 11a of the frame 11, and the sealing material (31, 31 '). ~ 6)).

  In the configuration in which the insertion hole 223 is provided in the bottom plate 221 of the oil-proof pan 22, the sealing material 31 may be provided at a position surrounding the outside of each insertion hole 223 (see claim 5 and FIGS. 4 and 5). The sealing material 31 ′ may be provided at a position simultaneously surrounding the outsides of the plurality of insertion holes 223, instead of the above-described configuration, or together with the above-described configuration.

Furthermore, the mounting portion 571 of the component device in which the mounting hole 572 into which the bolt 23 is inserted is formed is placed on the bottom plate 221 of the oil-proof tray 22,
It is preferable to provide a sealing material 32 that seals the interval δ2 between the mounting portion 571 and the bottom plate 221 of the oilproof tray 22 at the peripheral portion of the mounting hole 572 (see claim 7: FIG. 7).

  In this case, further, a nut 24 is screwed to the tip of the bolt 23 penetrating the mounting hole 572 of the mounting portion 571 and the distance between the mounting portion 571 and the nut 24 at the peripheral portion of the mounting hole 572 It is preferable to provide a sealing material 33 that seals (see claim 8: FIG. 7).

  According to the configuration of the present invention described above, in the working machine 1 provided with the oil-proof structure of the present invention, the following remarkable effects can be obtained.

  The oil barrier wall 21 standing from the top plate 11a of the frame 11 is formed at a position surrounding the outer periphery of the component device in plan view, and the oil leaked from the component device is stored inside the oil barrier wall 21. By forming the bottomed oil receiving tank 20 having the oil-proof wall 21 as a side wall, even if the oil leaks from the component equipment, the leaked oil is retained on the frame 11 Was able to prevent leaks out of the aircraft.

  In a configuration in which bolts 23 for attaching components are attached without providing a hole by a method such as stud welding on top plate 11a of frame 11 inside oil-proof wall 21, sealing is not performed on top plate 11a. It was possible to reliably prevent oils from falling below the top plate 11a.

  Further, an oil-proof pan 22 having a bottom plate 221 and a side wall 222 erected from the peripheral edge of the bottom board 221 is placed on the frame 11 to make the side wall 222 of the oil pan 22 as the oil-proof wall 21 described above. Then, by attaching the oil-proof pan 22 on the frame 11, the above-mentioned oil receiving tank 20 could be easily formed.

  A top plate 11a of a frame 11 to which a bolt 23 is attached, a bottom plate 221 having an insertion hole 223 for inserting the bolt 23, and an oilproof tray 22 having a side wall 222 erected from the periphery of the bottom plate 221. In the configuration in which the side wall 222 of the oilproof tray 22 is the oilproof wall 21, the bottom plate 221 of the oilproof tray 22 and the frame 11 are surrounded by the outer periphery of the insertion hole 223. The bottom plate 221 of the oil-proof pan 22 and the top plate 11a of the frame 11 and the sealing material (31, 31 ') are provided by providing a sealing material (31, 31') for sealing the gap .delta.1 between the top plates 11a. ) To form the liquid-tight bottom portion of the oil receiving tank 20, thereby providing an insertion hole 223 in the bottom plate 221 of the oil-proof tray 22, and for oil to be stored in the oil-proof tray 22. Receiving tank 2 It could be formed.

  In the configuration in which the sealing material 31 is provided on the peripheral portion of the insertion hole 223, oil is prevented from entering the gap δ1 between the top plate 11a of the frame 11 and the bottom plate 221 of the oil-proof pan 22 through the insertion hole 223 The sealing material 31 'is provided at a position surrounding the outside of the plurality of the insertion holes 223 simultaneously, such as providing the sealing material 31' over the entire periphery of the bottom plate 221 of the oilproof tray 22. In the above configuration, even if the oil infiltrates into the gap δ1 between the top plate 11a of the frame 11 and the bottom plate 221 of the oil-proof pan 22 through the insertion hole 223, the oils are outside the sealing member 31 ′. It was not possible to move, and by keeping the oil within this interval δ1, it was possible to prevent the leakage outside the machine.

  Furthermore, at the peripheral edge portion of the mounting hole 572 provided in the mounting portion 571 of the component mounted on the bottom plate 221 of the oilproof tray 22, the distance δ2 between the mounting portion 571 and the bottom plate 221 of the oilproof tray 22 is By providing the sealing material 32 to be sealed, it is also possible to prevent oil from entering the mounting hole 572 through the space between the bottom surface 573 of the mounting portion 571 and the bottom plate 221 of the oil-proof pan 22. I was able to.

  In particular, in the configuration in which the seal member 33 for sealing between the mounting portion 571 and the nut 24 screwed to the tip of the bolt 23 penetrating the mounting hole 572 of the mounting portion 571 is provided, I was able to prevent more reliably.

The perspective view of a working machine. The perspective view of the working machine of the state where the bonnet was removed. FIG. 3 is an enlarged perspective view of a lower portion of the receiver tank in FIG. 2; Sectional drawing which shows the oil-proof structure of the attachment part of a receiver tank. Sectional drawing which shows the oil-proof structure of the attachment part of a sub-frame. Sectional drawing which shows the modification of oil-proof structure. Sectional drawing which shows another modification of oil-proof structure.

  Hereinafter, the working machine 1 provided with the oil-proof structure of the present invention will be described with reference to the accompanying drawings.

  In the following description, the oil-resistant structure of the present invention is applied to a motor driven oil-cooled compressor by way of example. However, the oil-resistant structure of the present invention has the configuration described below. The present invention is not limited to the work machine 1 and can be applied to various work machines provided with components that may cause leakage of oil.

  1 and 2, reference numeral 1 denotes an oil-cooled compressor that is a working machine. The oil-cooled compressor 1 includes a frame 11 and a bonnet 12 that covers the frame 11 as shown in FIG. It is configured as a so-called “package type” compressor in which the component devices are accommodated in the soundproof box 10 configured.

  As shown in FIG. 2, components of the working machine are mounted on the frame 11 of the soundproof box 10, and in the present embodiment, which is the motor driven oil-cooled compressor 1, the gas to be compressed is A compressor main body 51 that compresses and discharges, a motor 52 that drives the compressor main body 51, and a compressed gas discharged from the compressor main body 51 is introduced to separate into compressed gas and lubricating oil (primary separation). A receiver tank 53, an oil cooler 54 for cooling the recovered lubricating oil in the receiver tank 53, and the like are mounted. The compressed gas from which the lubricating oil is separated in the receiver tank 53 is used as the lubricating oil as necessary. Is supplied to the consumption side (not shown) to which the air work machine etc. is connected after secondary separation and dehumidification, and the lubricating oil recovered in the receiver tank 53 is cooled by the oil cooler 54 and then pressure is again applied. And to be able to refuel the action space of the machine body 51.

  The main components such as the compressor main body 51, the motor 52, the receiver tank 53, and the oil cooler 54 that constitute these oil-cooled compressors, pipes and valves that communicate between these main components, and the components A support stand 56 for fixing on the frame 11, a stand 57 (anti-vibration rubber in this embodiment), and other accessories are attached on the frame 11 in a predetermined arrangement as shown in FIG.

  The above-described frame 11 on which the components of the oil-cooled compressor 1 are mounted is, in the example shown, a rectangular plate-shaped top plate 11a in plan view and legs projecting downward from both ends in the width direction of the top plate 11a. A portion 11b is provided, and the above-described components are mounted and fixed on the top plate 11a of the frame 11.

  An oil-proof wall 21 is erected on the top plate 11a of the frame 11 so as to surround the outside of the above-described component in plan view, and the lubricant leaked from the above-mentioned component inside the oil-proof wall 21 An oil receiving tank 20 having the oil barrier wall 21 as a side wall for storing oil is formed.

  The component devices are mounted on the frame 11 by bolting the component devices to the top plate 11 a of the frame 11 inside the oil-proof wall 21.

  The oil barrier wall 21 may be formed by welding a band plate on the top plate 11a of the frame 11 or by directly attaching it by other methods. In this way, the oil barrier wall 21 is directly installed on the top plate 11a of the frame 11. In this case, since the top plate 11a of the frame 11 alone constitutes the bottom portion of the oil receiving tank 20 described above, the top plate 11a of the frame 11 inside the oil-proof wall 21 has a holeless structure and In order to prevent oil leakage between the lower end of the wall 21 and the top plate 11a of the frame 11 and through the joint between the oil-proof walls 21, this portion is welded or filled with caulking material. And so on.

  Further, an oil-proof pan 22 having a bottom plate 221 and a side wall 222 erected upward from the peripheral edge of the bottom board 221 is placed on the frame 11, and the side wall 222 of the oil pan 22 is combined with the oil-proof wall 21 described above. In this case, as shown in FIG. 2, the oil-proof tray 22 is placed on the frame 11 having the top plate 11a, and the top of the frame 11 is placed between the top plate 11a and the oil-proof plate 22. The bottom plate 221 may have a double structure, or a pipe frame that does not have the top plate 11a is adopted as the frame 11, and the oilproof tray 22 is placed on the pipe frame, so that the oilproof tray 22 is provided. The bottom plate 221 may be used to form the top plate 11a of the frame 11.

  In the present embodiment, as shown in FIG. 2, the above-described oil-proof pan 22 is mounted and fixed on the frame 11 provided with the top plate 11 a, whereby the side walls 222 of the oil-proof pan 22 are oil-proof as described above. In addition to the wall 21, the upper portion of the frame 11 has a double structure including a top plate 11 a and a bottom plate 221 of the oil-proof pan 22.

  In this way, on the bottom plate 221 of the oil-proof tray 22 provided in the frame 11, bolts 23 for fixing components mounted on the bottom plate 221 of the oil-proof tray 22 are erected.

  The bolt 23 may be attached directly on the bottom plate 221 of the oil-proof pan 22 by a method such as stud welding, or the bolt 23 attached by a method such as stud welding may be mounted on the top plate 11 a of the frame 11. Alternatively, it may be provided on the bottom plate 221 of the oilproof tray 22 so as to protrude through the insertion hole 223 provided in the bottom plate 221 of the oilproof tray 22.

  In the configuration in which a bolt is directly stud-welded to the bottom plate 221 of the oil-proof pan 22, the bolt 23 can be erected without forming a hole in the bottom plate 221 of the oil-proof pan 22. It is advantageous in that sealing is not required, but when heavy components are fixed in this way, the bottom plate 221 of the oil-proof pan 22 made of a thin steel plate compared to the frame 11 In the present embodiment, the attachment of the relatively lightweight duct 55 (see FIG. 2) is performed by means of a bolt that is directly stud-welded to the bottom plate 221 of the oil pan 22 in this embodiment. On the other hand, for components including the heavy receiver tank 53, the motor 52, and the compressor body 51, the bolt 23 is welded to the top plate 11a of the frame 11 by stud welding. Thus the mounting, and the bolt 23 to be able to attach the component devices by standing on the bottom plate 221 of the oil retaining tray 22 via a through hole 223 formed in the bottom plate 221 of the oil retaining tray 22.

  The attachment of the component device to the bolt 23 may be performed by directly attaching the component device (for example, the attachment portion 531 of the receiver tank 53) to the bolt 23 which protrudes through the insertion hole 223 provided in the bottom plate 221 of the oilproof pan 22. Although it is preferable, in the present embodiment, as shown in FIG. 4, among the constituent equipment, as shown in FIG. 4, the vibration-proof rubber 57 is attached as a mount to the bolt 23 penetrating the bottom plate 221 of the oil-proof pan 22. The receiver tank 53 is fixed on the frame 11 by mounting the mounting portion 531 of the receiver tank 53 thereon.

  Further, the motor 52 and the compressor main body 51 driven by the motor 52 are the same up to the point that the vibration isolating rubber 57 is attached to the bolt 23 that penetrates the bottom plate 221 of the oil isolating tray 22. 5 is attached to a support frame 56 provided on the subframe 13 as shown in FIG. 2, and a motor 52 and a compressor main body are mounted on the support frame 56 provided on the subframe 13 as shown in FIG. 51 is attached.

  As described above, in the configuration of the present embodiment in which the insertion hole 223 is provided in the bottom plate 221 of the oil protection tray 22, the lubricating oil accumulated in the oil protection tray 22 leaks out of the machine through the insertion hole 223. In order to prevent this, the bolt 23 is attached to the top plate 11 a of the frame 11 by a method such as stud welding which does not form a hole in the top plate 11 a of the frame 11.

  Also, in order to prevent the lubricating oil that has entered into the insertion hole 223 from leaking out of the machine via the gap δ1 between the bottom plate 221 of the oil-proof tray 22 and the top plate 11a of the frame 11, the oil-proof tray 22 is The sealing members 31 and 31 ′ are held at a distance δ1 between the bottom plate 221 of the second embodiment and the top plate 11a of the frame 11.

  With such a configuration, the side wall 222 of the oilproof tray 22 is used as the side wall inside the side wall 222 of the oilproof tray 22, and the bottom plate 221 of the oilproof tray 22 and the top plate 11 a of the frame 11 are formed. An oil receiving tank 20 having a bottom with a double bottom structure is formed, and the oil leaking from the component equipment can be stored in the oil receiving tank 20.

  Between the bottom plate 221 of the oil-proof pan 22 and the top plate 11a of the frame 11 at the periphery of each insertion hole 223, as shown in the enlarged view of the endless annular seal material 31 in FIG. By sandwiching with this, it is possible to configure such that the lubricating oil that has entered into the insertion hole 223 does not enter into the gap δ1 between the bottom plate 221 of the oil-proof pan 22 and the top plate 11a of the frame 11.

  Alternatively, instead of the above configuration, along with the above configuration, as shown in FIG. 6, a seal is made between the bottom plate 221 of the oil protection tray 22 and the top plate 11 a of the frame 11 over the entire periphery of the bottom plate 221 of the oil protection tray 22 A configuration is adopted in which the gap δ1 between the bottom plate 221 of the oil-proof pan 22 and the top plate 11a of the frame 11 is sealed on the outer peripheral side of the plurality of insertion holes 223, such as sandwiching the material 31 ' Even when the lubricating oil infiltrates between the bottom plate 221 of the oil tray 22 and the top plate 11a of the frame 11, the lubricating oil that has penetrated is prevented from moving outside the seal member 31 'and within the gap δ1. It is also possible to prevent leakage outside the machine by confining the lubricating oil.

  Furthermore, the bottom surface 573 of the mounting portion 571 of the vibration-proof rubber 57 described above as shown in FIG. 7 and the bottom plate of the oil-proof pan 22 instead of or together with the configuration described with reference to FIGS. An endless annular seal member 32 is held at a gap δ2 between the upper surfaces 221 and the gap δ2 is sealed at the peripheral portion of the mounting hole 572, and the bottom surface 573 of the mounting portion 571 of the anti-vibration rubber 57 The lubricating oil may be prevented from infiltrating into the insertion holes 223 provided in the bottom plate 221 of the oil-proof pan 22 via the gap δ2 between the upper surfaces of the bottom plates 221.

  In this configuration, the seal material 33 such as an O-ring is further sandwiched between the upper surface 574 of the mounting portion 571 of the vibration-proof rubber 57 and the nut 24, and the space between the upper surface 574 of the mounting portion 571 of the vibration-proof rubber 57 and the nut 24 The lubricant oil may be prevented from infiltrating into the insertion hole 223 provided in the bottom plate 221 of the oil-proof pan 22 via the interval of

  In the work machine 1 provided with the oil protection structure of the present invention described above, when the lubricant oil leaks from the receiver tank 53, the oil pipe, etc., the leaked lubricant oil falls and accumulates in the oil guard plate 22.

  As described above, the bottom plate 221 of the oil-proof pan 22 is provided with the insertion hole 223 for inserting the bolt 23 for fixing the components of the work machine 1.

  However, as shown in FIG. 7, the seal member 32 is sandwiched between the bottom surface 573 of the mounting portion 571 of the vibration-proof rubber 57 and the upper surface of the bottom plate 221 of the oil-proof pan 22. In the configuration in which the sealing material 33 is sandwiched between the upper surfaces 574 of the mounting portions 571 of the rubber 57 for sealing, the lubricating oil in the oil-proof pan 22 receives the mounting portions 571 of the anti-vibration rubber 57 via these spaces. It is prevented from infiltrating in the penetration hole 223 provided in the bottom plate 221 of the attachment hole 572 and the oil-proof pan 22 which were provided in these.

  Further, as shown in FIG. 4 or FIG. 5, the distance δ1 between the bottom plate 221 of the oilproof tray 22 and the top plate 11a of the frame 11 at the peripheral portion of each of the insertion holes 223 provided in the bottom plate 221 of the oilproof tray 22 is endless. In the configuration in which the annular sealing material 31 is sandwiched, even if the lubricating oil enters the insertion hole 223 provided in the bottom plate 221 of the oil-proof tray 22, the lubricating oil is separated from the bottom plate 221 of the oil-proof tray 22. The lubricating oil can be prevented from leaking out of the machine by staying in the insertion hole 223 without being able to infiltrate into the gap δ1 between the top plates 11 a of the frame 11.

  Furthermore, as shown in FIG. 6, in the configuration in which the sealing material 31 'is held between the bottom plate 221 of the oilproof tray 22 and the top plate 11a of the frame 11 over the entire periphery of the bottom plate 221 of the oilproof tray 22 Even when the lubricating oil enters the gap δ1 between the bottom plate 221 of the oil-proof tray 22 and the top plate 11a of the frame 11 through the insertion hole 223 provided in the bottom plate 221 of the dish 22, the entered lubricating oil is sealed. It can not move to the outside of the material 31 ', and the lubricating oil can be kept within this interval δ1, which can prevent the leakage to the outside of the machine.

  As described above, in the working machine of the present invention, by applying any one or a combination of the above-described oil-proof structures, the oil-proof wall 21 (the side wall 222 of the oil-proof tray 22) is provided with an oil-proof structure. An oil receiver for storing lubricating oil leaked from a component, the bottom of which is formed by the bottom plate 221 of the oilproof tray 22 and / or the top plate 11a of the frame 11 with the wall 21 (side wall 222 of the oilproof tray 22) as a side wall The tank 20 can be formed on the frame 11 to prevent oil from leaking out of the machine and to prevent pollution of the surrounding environment.

1 Work machine (oil-cooled compressor)
10 soundproof box 11 frame 11a top board (of frame)
11b legs (of the frame)
13 subframe 20 oil receiving tank 21 oilproof wall 22 oilproof tray 221 bottom plate 222 side wall 223 insertion hole 23 bolt 24 nut 31, 31 'seal material (for interval δ1)
32 Sealing material (for spacing δ2)
33 Sealing material (between nut 24 and mounting portion 571)
51 Compressor main body 52 Motor (drive source)
53 Receiver tank 531 Mounting part (receiver tank)
54 Oil cooler 55 Duct 56 Support base 57 Anti-vibration rubber (base)
571 Mounting portion 572 Mounting hole 573 Bottom surface 574 Top surface δ1 spacing (spacing between bottom plate of oil-proof pan and frame top plate)
δ2 spacing (spacing between anti-vibration rubber mounting part and bottom plate of oil proof pan)

Claims (8)

In work machines with components mounted on the top of the frame,
The frame is provided with an oil barrier wall standing upright from the top plate at a position surrounding the outer periphery of the component device in a plan view, and the oil leaked from the component device is stored inside the oil barrier wall. An oilproof structure for a working machine, wherein a bottomed oil receiving tank having the oilproof wall as a side wall is formed.   A bolt for attaching the component device is mounted on the top plate of the frame inside the oil-proof wall without providing a hole in the top plate. Oil structure.   An oil-proof dish having a bottom plate and side walls erected from the periphery of the bottom plate is placed on the frame, and the component equipment is mounted on the bottom plate of the oil-proof dish, and the oil-proof dish The oil barrier structure for a working machine according to claim 1 or 2, wherein a side wall is the oil barrier wall. An oil-proof tray having a bottom plate provided with an insertion hole for the bolt and a side wall erected from the periphery of the bottom plate is placed on the frame, and the component device is mounted on the bottom plate of the oil-proof tray In addition, the side wall of the oilproof dish is the oilproof wall,
The bottom plate of the oil-proof pan and the top plate of the frame are provided by sealing the bottom plate of the oil-proof pan and the space between the top plate of the frame surrounding the outside of the insertion hole, The oil-proof structure for a working machine according to claim 2, wherein a liquid-tight bottom portion of the oil receiving tank is formed by the sealing material.   The oil-proof structure of a working machine according to claim 4, wherein the seal material is provided at a position surrounding the outer side of each of the insertion holes.   The oil proof structure of a working machine according to claim 4 or 5, wherein the sealing material is provided at a position which simultaneously encloses the outside of the plurality of insertion holes. The mounting portion of the component device in which the mounting hole into which the bolt is inserted is formed is mounted on the bottom plate of the oilproof pan,
The oil-proof of the working machine according to any one of claims 4 to 6, further comprising a sealing material for sealing a gap between the mounting portion and the bottom plate of the oil-proof pan at a peripheral portion of the mounting hole. Construction. A nut is screwed onto the tip of the bolt that has penetrated the mounting hole of the mounting portion, and a sealing material is provided for sealing a gap between the mounting portion and the nut at a peripheral portion of the mounting hole. The oil proof structure of the working machine according to claim 7.

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