JP4949984B2 - Construction machinery - Google Patents

Description

  The present invention relates to a construction machine such as a hydraulic excavator in which an engine is mounted on a swing frame of an upper swing body, for example.

  Generally, a hydraulic excavator used for excavation work of earth and sand is a self-propelled lower traveling body, an upper revolving body that is turnably mounted on the lower traveling body, and can be raised and raised to the front side of the upper revolving body It is comprised with the working device provided in.

  The upper revolving structure includes a revolving frame that forms a support structure, a cab that is provided on the left front side of the revolving frame and on which an operator rides, an engine that is mounted horizontally on the rear side of the revolving frame, A cooling fan that is provided in the engine and generates cooling air from the outside toward the internal engine by rotation, and a heat exchanger such as a radiator and an oil cooler provided to face the cooling fan. Yes.

  The engine is provided with an intake pipe connected to the intake side thereof, and an air cleaner for separating dust contained in the air sucked by the engine and cleaning the air is attached to the tip of the intake pipe. Yes.

  Furthermore, there is a space around the heat exchanger between the outer position and the inner position of the heat exchanger so that warm air on the engine side that has risen in temperature through the heat exchanger does not return to the outside of the heat exchanger. The partition which partitions off is provided. Further, the partition wall is made of, for example, a foam material using a resin material, and the intake pipe is penetrated (see, for example, Patent Document 1). Thereby, since the front end side of the intake pipe can be arranged at the outer position of the heat exchanger, the air cleaner attached to the front end side of the intake pipe can suck in cold outside air.

JP 2000-213782 A

  By the way, in patent document 1 mentioned above, in order to arrange | position an air cleaner in the outer side position of a heat exchanger, it is set as the structure which makes an intake piping penetrate the partition consisting of a foamed resin material. However, the hydraulic excavator vibrates during travel and work, and when the engine is mounted on the turning frame, a displacement occurs within an allowable range.

  Therefore, a gap is formed between the intake pipe and the partition wall only by passing the intake pipe through the partition wall due to vibration and displacement. As a result, the warm air on the engine side returns to the outside of the heat exchanger through the gap, and there is a problem that the cooling efficiency of the heat exchanger and the operating efficiency of the engine are reduced. In addition, there is a problem that sound on the engine side leaks through the gap and the working volume increases.

  The present invention has been made in view of the above-described problems of the prior art, and an object of the present invention is to cool the heat exchanger by preventing engine-side warm air and sound from leaking between the partition wall and the intake pipe. It is an object of the present invention to provide a construction machine capable of improving efficiency and engine operation efficiency and reducing the volume of work.

  A construction machine according to the present invention includes a frame that forms a support structure, an engine that is mounted on the frame and that drives a hydraulic pump and a cooling fan, and hydraulic oil that is provided facing the cooling fan and flows through the hydraulic pump by cooling air. A heat exchanger that cools a fluid containing cooling water that cools the engine, and a heat exchanger that sandwiches the heat exchanger so that warm air on the engine side that has risen in temperature through the heat exchanger does not return to the outside of the heat exchanger A partition wall that partitions between the engine side space and the opposite side space, and an intake pipe that is connected to the intake side of the engine and through which air flows toward the engine.

In order to solve the above-mentioned problem, the feature of the configuration adopted by the invention of claim 1 is that the partition has a pipe insertion hole through which the intake pipe is inserted , and one end surface is a pressing surface and the other end surface is supported. formed as a flexible elastic body becomes a surface, the support surface of the partition wall, fitted with a tube insertion hole supporting plate with an opening at that corresponds to the partition wall, in the middle of the intake pipe, the partition wall the bulging portion for sealing between than the pipe insertion hole formed in the larger diameter and the tube insertion hole and the intake pipe is provided, at a position along the intake pipe in the vicinity of the partition wall is bulging of the intake pipe A pipe fixing means for fixing the intake pipe to the frame side member in a state in which the section is pressed around the pipe insertion hole of the partition wall, and pressing the bulging part of the intake pipe against the pressing surface of the partition wall The piping is fixed in the By fixing the intake pipe by the step, the support plate is pressed from the opposite side of the pressing surface so that the partition wall is not escape, configurations and for adhering the bulging portion on the periphery of the pipe insertion hole of the partition wall It is to have done.

According to a second aspect of the present invention, a partition plate is provided on the front side of the engine so as to extend in the left and right directions of the frame and define the engine side space as an engine chamber. A cab on which an operator rides is provided on a frame, the partition is provided at a position closing a space between the partition plate and a rear surface of the cab, and the intake pipe is provided between the partition plate and the cab. The configuration is such that it extends in the left and right directions.

According to the first aspect of the present invention, the partition wall is formed as a flexible elastic body whose one end surface is a pressing surface and the other end surface is a support surface, and is provided with a pipe insertion hole through which the intake pipe is inserted. Further, a bulging portion is provided in the middle of the intake pipe to seal between the pipe insertion hole of the partition wall and the intake pipe . Therefore, when the intake pipe is inserted into the pipe insertion hole of the partition wall, the bulging portion can be brought into close contact with the periphery of the pipe insertion hole of the partition wall.

  As a result, the bulging portion can reliably seal between the pipe insertion hole of the partition wall and the intake pipe. As a result, warm air and sound on the engine side do not leak to the opposite side space located outside the heat exchanger through the pipe insertion hole, improving the fluid cooling efficiency by the heat exchanger and the engine operating efficiency can do. In addition, the volume during operation can be reduced, and quietness can be improved.

In addition , since the bulging portion is formed to have a larger diameter than the piping insertion hole of the partition wall, when the intake pipe is inserted into the piping insertion hole of the partition wall, the bulging portion can be pressed around the piping insertion hole. . Thereby, the partition around a piping penetration hole can be elastically deformed, and a bulging part can be stuck. Therefore, even when the construction machine vibrates during operation or work, or when the mounting position of the engine with respect to the frame is shifted, it is possible to reliably seal between the pipe insertion hole of the partition wall and the intake pipe.

Further , in a position along the intake pipe in the vicinity of the partition wall, a pipe fixing that fixes the intake pipe to the frame side member in a state where the bulging portion of the intake pipe is pressed around the partition pipe insertion hole. Means are provided. Thereby, the bulging part of intake piping can be correctly arrange | positioned in the position of the piping penetration hole of a partition, and can maintain a sealing effect over a long period of time.
Moreover, a support plate provided with an opening corresponding to the pipe insertion hole of the partition wall is attached to the support surface of the partition wall. For this reason, the support plate can be pressed from the opposite side of the pressing surface so that the partition wall does not escape by fixing the intake piping with the piping fixing means with the bulging part of the intake piping pressed against the pressing surface of the partition wall. it can. Thereby, a partition can be deform | transformed reliably and a bulging part can be closely_contact | adhered effectively and high sealing performance can be obtained.

According to the invention of claim 2 , the partition wall is provided at a position where the front side of the engine is closed between the partition plate extending in the left and right direction of the frame and the rear surface of the cab located on the front side of the partition plate. Is configured to extend in the left and right directions through the partition between the partition plate and the cab. Thus, the partition wall can block warm air and engine noise between the partition plate and the rear surface of the cab.

  Hereinafter, as a construction machine according to an embodiment of the present invention, a hydraulic excavator provided with a crawler type lower traveling body will be described as an example, and will be described in detail with reference to the accompanying drawings.

  First, FIG. 1 to FIG. 7 show a first embodiment of the present invention. In FIG. 1, reference numeral 1 denotes a hydraulic excavator as a construction machine used for earth and sand excavation work and the like. The hydraulic excavator 1 includes a self-propelled crawler-type lower traveling body 2, an upper revolving body 3 that is swingably mounted on the lower traveling body 2, and can be raised and lowered to the front side of the upper revolving body 3. This is roughly constituted by the working device 4 provided. Further, as shown in FIGS. 2 and 3, the upper swing body 3 includes a swing frame 5, a cab 6, an engine 8, a cooling fan 11, a heat exchanger 12, a partition wall 17, an intake pipe 19, and the like which will be described later. .

  A revolving frame 5 forms the base of the upper revolving unit 3. As shown in FIG. 3, the revolving frame 5 is provided with a thick bottom plate 5A extending in the front and rear directions, and standing on the bottom plate 5A, and extends in the front and rear directions with a predetermined interval in the left and right directions. A left vertical plate 5B, a right vertical plate 5C, a plurality of extended beams 5D extending outward in the left and right directions from the vertical plates 5B and 5C, and each extended beam positioned on the outside in the left and right directions A left side frame 5E and a right side frame 5F, which are attached to the front end of 5D and extend in the front and rear directions, are roughly configured.

  Reference numeral 6 denotes a cab (see FIGS. 1 and 2) mounted on the left front side of the revolving frame 5. The cab 6 is used by an operator. The cab 6 has a box shape formed by a front surface portion 6A, a rear surface portion 6B, a left side surface portion 6C, a right side surface portion 6D, and an upper surface portion 6E. Etc.) are arranged. Here, as shown by a dotted line in FIG. 1, the rear surface portion 6B of the cab 6 is a concave surface portion 6F whose lower portion is curved forward to form a piping chamber 16 described later on the front side of the air cleaner chamber 15. ing.

  Reference numeral 7 denotes a counterweight provided on the rear end side of the revolving frame 5, and the counterweight 7 is attached to the rear end portions of the left and right vertical plates 5 </ b> B and 5 </ b> C constituting the revolving frame 5. The counterweight 7 balances the weight of the entire upper swing body 3 with respect to the work device 4. Further, an engine 8 and a heat exchanger 12 described later are disposed on the front side of the counterweight 7.

  Reference numeral 8 denotes an engine that constitutes a power source mounted horizontally on the rear side of the turning frame 5. The engine 8 is accommodated in an engine chamber 14 described later that constitutes one of the machine chambers. Further, as shown in FIG. 3, a supercharger (turbocharger) 8B is provided on the upper front side of the engine 8 so as to be connected to the exhaust manifold 8A. An exhaust pipe 9 is provided at the exhaust outlet of the supercharger 8B. It is connected. On the other hand, a later-described intake pipe 19 is connected to the intake inlet of the supercharger 8B, and the intake outlet is connected to an intercooler 12C of the heat exchanger 12 described later. A hydraulic pump 10 that discharges pressure oil by being driven by the engine 8 is attached to the right side of the engine 8.

  Reference numeral 11 denotes a cooling fan provided on the output shaft located on the left side of the engine 8. The cooling fan 11 is driven to rotate by using the engine 8 as a power source to generate cooling air from the outside toward the internal engine 8. Specifically, the cooling fan 11 rotates together with the engine 8 to allow outside air to flow into an air cleaner chamber 15 which will be described later facing the outside. 14 to be distributed.

  A heat exchanger 12 is located on the left side of the engine 8 and is disposed facing the cooling fan 11. The heat exchanger 12 includes, for example, an oil cooler 12A that cools hydraulic oil, a radiator 12B that cools cooling water of the engine 8, and an intercooler 12C that cools air supercharged by the supercharger 8B of the engine 8. ing. Oil cooler 12A, radiator 12B, and intercooler 12C are arranged in parallel to the flow direction of the cooling air. On the other hand, the heat exchanger 12 also functions as a partition member that partitions the engine chamber 14 and the air cleaner chamber 15. Further, the heat exchanger 12 is provided with a condenser (not shown) that constitutes a part of the outdoor unit of the air conditioner and releases the heat of the refrigerant.

  Reference numeral 13 denotes a partition plate provided on the front side of the engine 8 and extending leftward and rightward. The partition plate 13 includes a left partition wall 13A that extends leftward from the left end of the engine 8 to a position beyond the heat exchanger 12, and a left partition wall 13A that extends leftward and rightward on the front side of the engine 8. And the right partition wall 13B provided. Further, as shown in FIG. 4, a through hole 13C through which an intake pipe 19 described later passes is formed on the left side of the right partition wall 13B.

  Further, the partition plate 13 is provided with the front end portion of the heat exchanger 12 extending in the left and right directions, so that the engine as an engine side space that houses the engine 8, the hydraulic pump 10, and the like on the right side of the heat exchanger 12. A chamber 14 is defined. On the other hand, an air cleaner chamber 15 as an opposite space is defined on the opposite side of the engine chamber 14 across the heat exchanger 12. As a result, the outside air that has flowed into the upstream air cleaner chamber 15 passes through the heat exchanger 12 and flows toward the downstream engine chamber 14.

  Further, the left partition wall 13A of the partition plate 13 defines a piping chamber 16 with the concave surface portion 6F (rear surface portion 6B) of the cab 6. The piping chamber 16 includes an intake piping 19 and an air cleaner 24 described later. A part of is arranged. Further, a partition wall 17 and a pipe fixing band 22 described later are attached to the front surface of the left partition wall 13 </ b> A of the partition plate 13.

  Here, during the operation of the engine 8, warm air in the engine chamber 14 leaks directly through the through hole 13 </ b> C of the partition plate 13 or indirectly leaks through the partition plate 13. The warm air leaking from the engine chamber 14 may return to the air cleaner chamber 15 through which the air cleaner 24 sucks air through the piping chamber 16. When warm air flows into the air cleaner chamber 15, The cooling efficiency and the operating efficiency of the engine 6 are reduced. In addition, the operation sound of the engine 6 leaks from the same path as the warm air. Therefore, a partition wall 17 described later is provided in the piping chamber 16 so that warm air on the engine chamber 14 side does not return to the air cleaner chamber 15.

  Reference numeral 17 denotes a partition wall provided on the front surface of the left partition wall 13 </ b> A of the partition plate 13. The partition wall 17 partitions the piping chamber 16 to the left and right so that warm air on the side of the engine chamber 14 that has risen in temperature from the air cleaner chamber 15 through the heat exchanger 12 does not return to the air cleaner chamber 15 through the piping chamber 16. ing. Further, the partition wall 17 is made of various foams such as a material having flexibility that can be deformed when pressed and an elastic force that repels and adheres to the pressed member, such as urethane resin or styrene resin. Or a variety of rubber materials such as urethane resin, silicon resin, etc., preferably a foam material or rubber material using urethane resin, and a plate shape with a predetermined thickness that can be sufficiently deformed It is formed as a body.

  In addition, the partition wall 17 is formed obliquely so that the upper part corresponds to the concave surface part 6F of the cab 6, and the lower part corresponds to the shape of the swivel frame 5, piping, wiring, etc. It is bent stepwise toward the left side. In this case, when there is no obstacle around, the partition wall 17 can be formed straight upward and downward.

  On the other hand, in the partition wall 17, a pipe insertion hole 17 </ b> A is formed at a position near the partition plate 13 in the middle part in the upward and downward directions. This pipe insertion hole 17A is a hole through which a normal portion (portion other than the bulging portion 20) of an intake pipe 19 to be described later is inserted, and has a circular inner diameter d (see FIG. 6) substantially equal to the diameter of this portion. It is open. Further, the partition wall 17 has a left end surface serving as a pressing surface 17B against which the bulging portion 20 of the intake pipe 19 is pressed, and a right end surface positioned opposite to the support surface 17C.

  Reference numeral 18 denotes a support plate attached so as to face the support surface 17 </ b> C of the partition wall 17. The support plate 18 is made of a strong steel plate or the like, and holds the partition wall 17 from the side opposite to the pressing surface 17B of the bulging portion 20. The support plate 18 is provided with an opening 18 </ b> A corresponding to the pipe insertion hole 17 </ b> A of the partition wall 17. The support plate 18 is pressed from the opposite side so that the partition wall 17 does not escape when the bulging portion 20 of the intake pipe 19 is pressed against the pressing surface 17B of the partition wall 17. Thereby, the partition wall 17 can be reliably deformed and the bulging portion 20 of the intake pipe 19 can be brought into close contact.

  Reference numeral 19 denotes an intake pipe connected to the intake side of the engine 8. The intake pipe 19 circulates air toward the engine 8, and is provided extending in the left and right directions in the pipe chamber 16. The proximal end side of the intake pipe 19 enters the engine chamber 14 through the through hole 13 </ b> C of the partition plate 13 and is connected to the intake side of the supercharger 8 </ b> B constituting the engine 8. On the other hand, the front end side of the intake pipe 19 is connected to an air cleaner 24 described later in the air cleaner chamber 15.

  In addition, the intake pipe 19 is a straight pipe portion 19 </ b> A whose middle portion in the length direction extends straight along the left partition wall 13 </ b> A of the partition plate 13 in the left and right directions. The straight pipe portion 19 </ b> A passes through the pipe insertion hole 17 </ b> A of the partition wall 17 and the opening 18 </ b> A of the support plate 18. The intake pipe 19 has at least a straight pipe portion 19A formed as a metal pipe.

  Reference numeral 20 denotes a bulging portion provided in the straight pipe portion 19 </ b> A which is an intermediate portion of the intake pipe 19. The bulging portion 20 is formed with an outer dimension D that is larger than the inner diameter d of the pipe insertion hole 17A (D> d). That is, when one of the processing means of the bulging portion 20 is described, a part of the metal pipe is formed as an integral flange portion by projecting in a mountain shape outward in the radial direction over the entire circumference. As a result, the bulging portion 20 can be pressed against the periphery of the pipe insertion hole 17A of the partition wall 17 so that the surrounding partition wall 17 can be deformed and brought into close contact with the pipe insertion hole 17A of the partition wall 17. It can be hermetically sealed.

  Reference numeral 21 denotes a fixing groove provided on the straight pipe portion 19 </ b> A of the intake pipe 19 that is located on the engine 8 side of the bulging portion 20. The fixing groove 21 is formed as an integral annular groove by, for example, recessing a part of the metal pipe over the entire circumference. The fixing groove 21 is fitted with a later-described pipe fixing band 22, and the center portion in the width direction is a fixing position by the pipe fixing band 22.

  Reference numeral 22 denotes a pipe fixing band as a pipe fixing means provided on the left partition wall 13A of the partition plate 13 so as to correspond to the straight pipe portion 19A of the intake pipe 19. The pipe fixing band 22 fixes the intake pipe 19 in a state where the bulging portion 20 of the intake pipe 19 is pressed around the pipe insertion hole 17 </ b> A of the partition wall 17. Specifically, the pipe fixing band 22 is fitted in the fixing groove 21 of the intake pipe 19 to position and fix the intake pipe 19 in the left and right directions (the axial direction of the straight pipe portion 19A). Can do. The pipe fixing band 22 is made of a plate material bent into an Ω shape, and both ends thereof are attached to the left partition wall 13A of the partition plate 13 serving as a member on the revolving frame 5 side using bolts 23. Yes.

  Here, in the first embodiment, the pipe fixing band 22 is disposed on the opposite side of the pressing surface 17B of the partition wall 17 to which the bulging portion 20 of the intake pipe 19 is pressed, that is, on the support surface 17C side (right side). ing. Therefore, the distance dimension L1 from the fixing position by the pipe fixing band 22 to the pressing surface 17B of the partition wall 17 is larger than the distance dimension L2 from the fixing position of the fixing groove 21 of the intake pipe 19 to the bulging portion 20. It is set (L1> L2).

  Reference numeral 24 denotes a centrifugal air cleaner attached to the front end side (upstream side) of the intake pipe 19. The air cleaner 24 cleans the air by centrifuging dust in the air supplied to the engine 8 through the intake pipe 19. Here, the air cleaner 24 is disposed in the air cleaner chamber 15 which is located outside the heat exchanger 12, and the air suction port 24A is open to the air cleaner chamber 15 into which cold outside air flows.

  Reference numeral 25 denotes an exterior cover provided on the revolving frame 5. The exterior cover 25 includes an engine cover 25A that covers the upper side of the engine 8, the hydraulic pump 10, the heat exchanger 12, and the like, a left side cover 25B that covers the heat exchanger 12 from the left side, and a right side surface that covers the hydraulic pump 10 from the right side. A cover (not shown) and a right front cover 25C are included. Here, the engine cover 25A closes the upper side of the engine chamber 14 and the air cleaner chamber 15, the left side cover 25B closes the left side of the air cleaner chamber 15, and the right side cover closes the right side of the engine chamber 14.

  The hydraulic excavator 1 according to the first embodiment has the above-described configuration. Next, a procedure for attaching the intake pipe 19 will be described.

  First, the fixing groove 21 side of the straight pipe portion 19 </ b> A forming the intake pipe 19 is inserted into the pipe insertion hole 17 </ b> A and the opening 18 </ b> A of the support plate 18 from the pressing surface 17 </ b> B side of the partition wall 17. Then, the bulging portion 20 of the intake pipe 19 is pressed against the partition wall 17 around the pipe insertion hole 17A, and the bulging portion 20 is arranged at a predetermined position while deforming the partition wall 17 as shown in FIG. In this state, the pipe fixing band 22 is fitted into the fixing groove 21, and the pipe fixing band 22 is fixed to the left partition wall 13 </ b> A of the partition plate 13 using the bolts 23.

  As a result, the intake pipe 19 closely contacts the partition wall 17 with the bowl-shaped bulging portion 20 while elastically deforming the partition wall 17, so that the partition wall 17 and the intake pipe 19 are relatively vibrated or assembled. Even in the case where the position shift occurs, no gap is formed between the intake pipe 19 and the pipe insertion hole 17A of the partition wall 17. Therefore, the warm air on the engine 8 side does not return to the air cleaner chamber 15 side through the pipe insertion hole 17A of the partition wall 17, and the engine sound does not leak to the outside.

  Next, the operation of the hydraulic excavator 1 according to the first embodiment will be described. The operator gets on the cab 6 of the upper swing body 3 and operates a traveling operation lever (not shown) to The traveling body 2 can be moved forward or backward. On the other hand, by operating a working operation lever (not shown), the working device 4 can be moved up and down to perform excavation work of earth and sand.

  Thus, according to the first embodiment, the air cleaner chamber 15 and the partition wall 17 in contact with the outside are formed with flexibility and elasticity using, for example, urethane resin, and then the pipe insertion hole 17A of the partition wall 17 is used. A bulging portion 20 is provided in the middle of the intake pipe 19 that passes through the pipe.

  Therefore, by inserting the intake pipe 19 into the pipe insertion hole 17A of the partition wall 17 and disposing the bulging part 20 in the pipe insertion hole 17A, the bulging part 20 can be brought into close contact with the pipe insertion hole 17A.

  As a result, the space between the pipe insertion hole 17A of the partition wall 17 and the intake pipe 19 can be reliably sealed. Thus, warm air and sound leaking from the engine chamber 14 do not leak to the air cleaner chamber 15 or the outside through the pipe insertion hole 17A, so that the fluid cooling efficiency by the heat exchanger 12 and the operating efficiency of the engine 8 are improved. Can be improved. In addition, the volume during operation can be reduced, and quietness can be improved.

  In addition, since the bulging portion 20 is formed to have a larger diameter with an outer diameter D that is larger than the inner diameter d of the pipe insertion hole 17A of the partition wall 17, the bulging portion 20 is pressed around the pipe insertion hole 17A. Thus, the partition wall 17 around the pipe insertion hole 17A can be elastically deformed, and the bulging portion 20 can be effectively adhered. Thus, even when the excavator 1 vibrates during running or work, or even when the mounting position of the engine 8 with respect to the turning frame 5 is shifted, the space between the pipe insertion hole 17A of the partition wall 17 and the intake pipe 19 is reliably sealed. can do.

  Further, the partition plate 13 is provided with a pipe fixing band 22 that fixes the intake pipe 19 in a state where the bulging portion 20 of the intake pipe 19 is pressed around the pipe insertion hole 17A of the partition wall 17. Thereby, the bulging part 20 of the intake pipe 19 can be always pressed around the pipe insertion hole 17A of the partition wall 17, and the sealing effect can be maintained for a long time.

  On the other hand, a partition plate 13 defining the front side of the engine chamber 14 is provided, and the partition wall 17 closes the piping chamber 16 between the partition plate 13 and the rear surface portion 6B (concave surface portion 6F) of the cab 6. Thereby, the partition wall 17 can block the warm air returning to the air cleaner chamber 15 in the piping chamber 16 and the engine sound leaking outside.

  Further, since the pipe fixing band 22 is arranged on the side opposite to the pressing surface 17B of the partition wall 17 to which the bulging portion 20 of the intake pipe 19 is pressed, from the fixing position by the pipe fixing band 22 to the pressing surface 17B of the partition wall 17. The distance dimension L1 is set to be larger than the distance dimension L2 from the fixing position of the fixing groove 21 of the intake pipe 19 to the bulging portion 20. Thereby, when the intake pipe 19 is fixed by the pipe fixing band 22, the bulging portion 20 of the intake pipe 19 can be pressed against the periphery of the pipe insertion hole 17 </ b> A (the pressing surface 17 </ b> B) of the partition wall 17.

  Further, the partition wall 17 is provided with a support plate 18 having a strength facing the support surface 17C opposite to the pressing surface 17B that presses the bulging portion 20 of the intake pipe 19. An opening 18A is provided corresponding to the pipe insertion hole 17A. As a result, when the bulging portion 20 is pressed against the pressing surface 17B of the partition wall 17, the support plate 18 can be pressed from the opposite side so that the partition wall 17 does not escape. The protruding portion 20 can be effectively adhered, and high sealing performance can be obtained.

  Next, FIGS. 8 to 10 show a second embodiment of the present invention. The feature of this embodiment is that the pipe fixing means is arranged on the pressing surface side of the partition wall where the bulging portion of the intake pipe is pressed. In the second embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.

  In FIG. 8, reference numeral 31 denotes an intake pipe according to the second embodiment. The intake pipe 31 is formed with a bulging portion 32 and a fixing groove 33 in the straight pipe portion 31A in substantially the same manner as the intake pipe 19 according to the first embodiment. However, the intake pipe 31 according to the second embodiment corresponds to the fact that a later-described pipe fixing band 34 is disposed on the pressing surface 17B side (left side) of the partition wall 17, and the bulging portion 32 is disposed on the right side. This is different from the intake pipe 19 according to the first embodiment in that the fixing groove 33 is arranged on the left side.

  Reference numeral 34 denotes a pipe fixing band as a pipe fixing means according to the second embodiment provided on the left partition wall 13A of the partition plate 13. This pipe fixing band 34 is substantially the same as the pipe fixing band 22 according to the first embodiment, with the bulging portion 32 of the intake pipe 31 being pressed around the pipe insertion hole 17 </ b> A of the partition wall 17. By fitting in the groove 33, the intake pipe 31 is positioned and fixed leftward and rightward (in the axial direction of the straight pipe portion 31A).

  However, the pipe fixing band 34 according to the second embodiment is arranged on the pressing surface 17B side of the partition wall 17 against which the bulging portion 32 of the intake pipe 31 is pressed, so that the pipe fixing band according to the first embodiment is used. It is different from the band 22. In this case, as shown in FIGS. 9 and 10, the distance dimension L 3 from the fixing position by the pipe fixing band 34 to the pressing surface 17 B of the partition wall 17 is from the fixing position of the fixing groove 33 of the intake pipe 31 to the bulging portion 32. The distance dimension L4 is set to be larger than the distance dimension L4 (L3> L4).

  Thus, also in the second embodiment configured as described above, it is possible to obtain substantially the same operational effects as those of the first embodiment described above.

  In particular, in the second embodiment, the pipe fixing band 34 is disposed on the pressing surface 17B side of the partition wall 17 to which the bulging portion 32 of the intake pipe 31 is pressed. The distance dimension L3 to the pressing surface 17B of 17 is set to be larger than the distance dimension L4 from the fixing position of the fixing groove 33 of the intake pipe 31 to the bulging portion 32. Thus, when the intake pipe 31 is fixed by the pipe fixing band 34, the bulging portion 32 of the intake pipe 31 is pressed against the pipe insertion hole 17A of the partition wall 17 (the pressing surface 17B) to block warm air and sound. it can.

  In the first embodiment, the intake pipe 19 has been described with an example in which the straight pipe portion 19A is formed as a metal pipe. However, the present invention is not limited to this. For example, the entire intake pipe may be formed as a metal pipe or a resin pipe. This configuration can be similarly applied to the second embodiment.

  Further, as in the first modification shown in FIG. 11, when the straight pipe portion 41A of the intake pipe 41 is formed as a resin pipe, the bulging portion 42 is formed so as to deposit resin around the straight pipe portion 41A. May be. Further, the fixing concave grooves 43 may be formed between the flange portions 43A by forming the flange portions 43A around the straight tube portion 41A with a predetermined interval. In the first modification, the step can be eliminated from the straight pipe portion 41A, and therefore air can be efficiently supplied toward the engine 8.

  Further, as in the second modification shown in FIG. 12, the straight pipe part 51A of the intake pipe 51 is formed as a metal pipe, and a part of the straight pipe part 51A is recessed over the entire circumference, thereby causing the bulging part. A mounting groove 52 is formed. And it is good also as a structure which attaches the bulging part 53 of the cross-sectional mountain shape which consists of a resin material to this bulging part attachment groove | channel 52, and forms the ditch | groove 54 for fixation with predetermined spacing.

  Further, as in the third modified example shown in FIG. 13, the intake pipe 61 is divided into two pipe parts 61A and 61B on the way, and the bulging parts 62 provided separately are respectively connected to the pipe parts 61A. , 61B may be configured to be flange-connected. In the third modified example, the case where the fixing groove 63 is formed in the piping portion 61 </ b> A spaced from the bulging portion 62 with a predetermined interval is illustrated.

  On the other hand, in the first embodiment, the pipe fixing band 22 is configured such that a plate material bent into an Ω shape is fitted into the fixing groove 21 of the intake pipe 19, and both ends are separated using the bolts 23. The case where it was set as the structure attached to 13 A of left side partition walls was demonstrated as an example. However, the present invention is not limited to this. For example, a screw hole may be provided in the intake pipe, and the intake pipe may be attached to the partition plate by screwing a bolt directly into the screw hole. In addition, the configuration is not limited to the above-described configuration as long as the configuration can fix the intake pipe to the partition plate in a positioned state. Further, when the intake pipe is positioned and fixed in a state where the intake pipe is assembled, the pipe fixing band 22 can be eliminated. These configurations can be similarly applied to the second embodiment and each modification.

  Furthermore, in each embodiment, the hydraulic excavator 1 provided with the crawler type lower traveling body 2 was described as an example of the construction machine. However, the present invention is not limited to this, and may be applied to a hydraulic excavator provided with a wheel type lower traveling body made of, for example, a tire or the like. Besides, it can be widely applied to other construction machines equipped with engines such as wheel loaders and hydraulic cranes.

1 is a front view showing a hydraulic excavator according to a first embodiment of the present invention. It is a top view which expands and shows the hydraulic shovel of FIG. It is a top view which expands and shows a turning frame, an engine, a heat exchanger, an intake piping, an air cleaner, etc. It is a perspective view of the principal part expansion which shows a partition, an intake piping, and a piping fixing band with a turning frame, a heat exchanger, a partition plate, an air cleaner, etc. It is the principal part expanded sectional view which looked at the partition plate, the partition, the straight pipe part of the intake pipe, and the pipe fixing band from the arrow VV direction in FIG. It is a principal part expanded sectional view which shows the partition plate in FIG. 5, a partition, and a piping fixing band. It is a principal part expanded sectional view which shows the straight pipe part of the intake piping in FIG. It is the principal part expanded sectional view which looked at the straight pipe part and piping fixed band of the intake piping by the 2nd Embodiment of this invention from the same position as FIG. 5 with the partition plate and the partition. It is a principal part expanded sectional view which shows the partition plate in FIG. 8, a partition, and a piping fixing band. It is a principal part expanded sectional view which shows the straight pipe part of the intake piping in FIG. It is a principal part expanded sectional view which shows the straight pipe part of the intake piping by the 1st modification of this invention alone. It is a principal part expanded sectional view which shows the straight pipe part of the intake piping by the 2nd modification of this invention alone. It is a principal part expanded sectional view which shows the intake piping by the 3rd modification of this invention alone.

Explanation of symbols

1 Excavator (construction machine)
DESCRIPTION OF SYMBOLS 5 Revolving frame 6 Cab 6B Rear surface part 6F Concave surface part 8 Engine 10 Hydraulic pump 11 Cooling fan 12 Heat exchanger 13 Partition plate 14 Engine room (engine side space)
15 Air cleaner room (space on the opposite side)
16 piping chamber 17 partition 17A piping insertion hole 17B pressing surface 17C support surface 19, 31, 41, 51, 61 intake piping 19A, 31A, 41A, 51A straight pipe portion 20, 32, 42, 53, 62 bulging portion 21, 33, 43, 54, 63 Fixing groove 22, 34 Pipe fixing band (pipe fixing means)
24 Air Cleaner d Inner Diameter of Bulkhead Pipe Insertion Hole D Outer Diameter of Bulge

Claims (2)

A frame that forms a support structure, an engine that is mounted on the frame and drives a hydraulic pump and a cooling fan, hydraulic oil that is provided facing the cooling fan and flows through the hydraulic pump by cooling air, and cooling water that cools the engine A heat exchanger that cools the contained fluid, and the engine side space and the opposite side across the heat exchanger so that warm air on the engine side that has risen in temperature through the heat exchanger does not return to the outside of the heat exchanger In a construction machine comprising a partition wall that partitions the space, and an intake pipe that is connected to the intake side of the engine and through which air flows toward the engine,
The partition is formed as a flexible elastic body having a pipe insertion hole through which the intake pipe is inserted and having one end face as a pressing face and the other end face as a support face ,
A support plate provided with an opening corresponding to the pipe insertion hole of the partition wall is attached to the support surface of the partition wall,
Wherein the middle of the intake pipe, provided with a bulging portion for sealing between the intake piping and a larger diameter the tube insertion hole from the pipe insertion hole of the partition wall,
A pipe that fixes the intake pipe to a member on the frame side in a state in which the bulging portion of the intake pipe is pressed around the pipe insertion hole of the partition wall at a position along the intake pipe in the vicinity of the partition wall Fixing means,
By fixing the intake pipe with the pipe fixing means in a state where the bulging portion of the intake pipe is pressed against the pressing surface of the partition wall, the support plate is opposite to the pressing surface so that the partition wall does not escape. A construction machine characterized in that the bulging portion is pressed against the periphery of the pipe insertion hole of the partition wall. Provided on the front side of the engine is a partition plate that extends in the left and right directions of the frame and defines the engine side space as an engine room,
A cab on which an operator gets on the frame located on the front side of the partition plate;
The partition is provided at a position that closes between the partition plate and the rear surface of the cab,
The construction machine according to claim 1, wherein the intake pipe is configured to extend left and right between the partition plate and the cab through the partition wall.

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