JP2008111255A - Construction machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To properly rotate a large cover, when opening and closing an opening part of an engine enclosure, by restraining positional dislocation of the large cover relative to a small cover. <P>SOLUTION: A guide bracket 22 having an upward projecting guide part 22B is arranged in an overlapping part 18E overlapping with the large cover 19 among the small cover 18, and a bracket 24 is arranged in a right side plate part 19D of the large cover 19, and when the large cover 19 exists in a closing position or its vicinity, the bracket 24 is constituted so as to abut on the guide part 22B of the guide bracket 22. Thus, even if the large cover 19 is positionally dislocated to the small cover 18 by deflective deformation, positional dislocation of this large cover 19 can be restrained by abutment of the guide part 22B of the guide bracket 22 and the bracket 24, and the large cover 19 can be smoothly rotated between an opening position and the closing position. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a construction machine such as a hydraulic excavator and a wheel loader, and more particularly to a construction machine provided with a building cover that houses a power source including an engine.

  Generally, a hydraulic excavator as a construction machine is provided with a self-propelled lower traveling body, an upper revolving body that is turnably mounted on the lower traveling body, and an upside-down movable structure on the front side of the upper revolving body. The work device is generally constructed, and the work device is moved up and down while turning the upper turning body to perform excavation work of earth and sand.

  A building cover for accommodating a power source including the engine is provided on the rear side of the upper swing body, and the upper surface of the building cover is normally inspected for the power source, An opening for projecting the upper part of the power source that does not fit in the space is formed. For this reason, the engine cover for covering the opening part and the power source which protruded from this opening part is provided in the upper surface part of the building cover. (For example, refer to Patent Document 1).

JP 2006-56326 A

  Here, the above-described engine cover according to the prior art has a small cover with a small height and is fixed to the building cover, and a larger height than the small cover, and closes the opening of the building cover. A large cover that rotates between a closed position that opens and an open position that opens. In this case, the large cover is pivotally attached to the building cover using a hinge member on one side in the width direction (left and right directions) and the other side in the width direction is a free end, and the large cover is in the closed position. In some cases, a portion of the free end side overlaps the small cover.

  The large cover is usually attached with a handle for gripping by the operator, and the worker who performs the inspection of the power source holds the large cover by gripping the handle in a state where it is raised to the upper surface of the building cover. It is the structure which can be rotated between a closed position and an open position centering on a hinge member.

  On the other hand, a portion of the large cover that overlaps the small cover is usually provided with a cushioning material made of an elastic material such as rubber, and when the large cover is in the closed position, the large cover and the small cover are interposed via the cushioning material. It is the structure which overlaps.

  However, if the handle is attached at a position far away from the center of gravity of the large cover, when the handle is gripped and the large cover is rotated, an eccentric load is applied to the large cover by its own weight, causing the large cover to bend and deform. Etc. will occur. Therefore, when the large cover is rotated from the open position to the closed position, if the large cover is displaced with respect to the small cover due to bending deformation or the like, the large cover cannot reliably overlap the small cover. There is a problem that.

  On the other hand, if the large cover is displaced with respect to the small cover due to bending deformation or the like when the large cover is rotated from the closed position to the open position, the contact surface between the cushioning material provided on the large cover and the small cover Pressure increases. In this case, the large cover cannot be smoothly rotated to the open position, and not only the workability when checking the power source is reduced, but also the cushioning material is worn out at an early stage. is there.

  The present invention has been made in view of the above-described problems of the prior art, and can suppress the displacement of the large cover with respect to the small cover, and can properly rotate the large cover when opening and closing the opening of the building cover. The purpose is to provide such a construction machine.

  In order to solve the above-described problems, the present invention provides a frame that forms a support structure, a power source that includes an engine provided in the frame, and a power source that is provided on the upper surface of the frame and that accommodates the power source. A building cover in which an opening for inspecting the source is formed, and an engine cover that is provided on an upper surface of the building cover and covers the opening, and the engine cover includes a small cover having a small height dimension; The present invention is applied to a construction machine constituted by a large cover having a height dimension larger than that of the small cover and pivoting so as to be opened and closed.

  According to the first aspect of the present invention, the small cover is provided with a guide bracket having a guide portion, and the small cover is brought into contact with the guide portion of the guide bracket. A bracket for suppressing the displacement of the large cover relative to

  According to a second aspect of the present invention, the large cover is attached to the building cover so that the large cover has one side in the width direction opposite to the small cover as an attachment portion, and is adjacent to the small cover. The other side is configured as a free end, and at least one of the free end sides of the large cover in a direction orthogonal to the width direction is provided with a handle for gripping the large cover when rotating. The guide bracket and the bracket are provided on the other side in the orthogonal direction.

  According to the invention of claim 1, when the large cover is rotated in order to open and close the opening formed in the building cover, the bracket provided on the large cover contacts the guide portion of the guide bracket provided on the small cover. By contacting, the displacement of the large cover relative to the small cover can be suppressed. Thus, even if the large cover is displaced due to bending deformation or the like, the displacement can be corrected by the contact between the bracket and the guide bracket, so that the large cover can be smoothly rotated, and the building cover The workability when checking the power source by opening the opening can be improved.

  According to the invention of claim 2, when the large cover is rotated by gripping a handle provided on one side of the orthogonal direction orthogonal to the width direction of the large cover, the other side of the large cover is deformed by bending. Even if this occurs, the bracket provided on the other side of the large cover in the orthogonal direction comes into contact with the guide portion of the guide bracket provided on the small cover, so that the displacement of the large cover can be suppressed. Therefore, the large cover can be smoothly rotated when opening and closing the opening of the building cover.

  Hereinafter, the embodiment of the construction machine according to the present invention will be described in detail with reference to FIGS. 1 to 12 by taking as an example a case where the construction machine is applied to a hydraulic excavator.

  First, FIG. 1 thru | or FIG. 9 has shown the 1st Embodiment of this invention. In the figure, reference numeral 1 denotes a hydraulic excavator as a construction machine. The hydraulic excavator 1 includes a self-propelled crawler-type lower traveling body 2 and an upper revolving body 3 that is rotatably mounted on the lower traveling body 2. The upper revolving unit 3 is generally configured by a working device 4 that is provided so as to be able to move up and down and performs excavation work of earth and sand.

  Reference numeral 5 denotes a revolving frame serving as a base of the upper revolving structure 3, and the revolving frame 5 forms a strong support structure. As shown in FIG. 4, the turning frame 5 includes a center frame 6, a left side frame 7, a right side frame 8, each extending beam 9, and the like, which will be described later.

  Reference numeral 6 denotes a center frame that constitutes the central portion of the revolving frame 5, and the center frame 6 is erected on a bottom plate 6A formed of a thick steel plate or the like extending in the front and rear directions, and on the bottom plate 6A. The left vertical plate 6B and the right vertical plate 6C extend in the front and rear directions while facing in the right direction. The work device 4 is attached to the front side of the left and right vertical plates 6B and 6C so as to be able to move up and down.

  Reference numeral 7 denotes a left side frame which is arranged on the left side of the center frame 6 with an interval and extends in the front and rear directions. Reference numeral 8 denotes a right side frame which is arranged on the right side of the center frame 6 with an interval and which extends in the front and rear directions. ing. Each of these side frames 7 and 8 is attached to the tip of a plurality of extending beams 9 extending leftward and rightward from the center frame 6.

  Reference numeral 10 denotes a cab disposed on the left front portion of the revolving frame 5, and the cab 10 defines a cab in which an operator is boarded. Inside the cab 10 are disposed a driver's seat on which an operator is seated, various operation levers and the like (none of which are shown). Reference numeral 11 denotes a counterweight attached to the rear end portion of the revolving frame 5, and the counterweight 11 balances the weight with the work device 4.

  A power source 12 is located on the front side of the counterweight 11 and provided on the revolving frame 5. The power source 12 includes an engine 13, a hydraulic pump 14, a heat exchanger 15 and the like, which will be described later, as shown in FIG. It is comprised by.

  Reference numeral 13 denotes an engine constituting the power source 12, and the engine 13 is mounted on the left and right vertical plates 6B and 6C of the revolving frame 5 in a horizontally placed state extending in the left and right directions. Here, on the left side of the engine 13, a cooling fan 13A for supplying cooling air to a heat exchanger 15 described later is provided, and on the right side of the engine 13, an exhaust pipe 13B, a silencer 13C, and the like are provided. Yes.

  Reference numeral 14 denotes a hydraulic pump attached to the right side of the engine 13, and the hydraulic pump 14 is driven by the engine 13. The hydraulic pump 14 discharges pressure oil for operation toward various hydraulic actuators provided in the lower traveling body 2, the work device 4, and the like.

  A heat exchanger 15 is provided on the left side of the engine 13 so as to face the cooling fan 13A. The heat exchanger 15 includes, for example, a radiator that cools engine cooling water, an oil cooler that cools hydraulic oil, and a turbocharger. It is comprised by the intercooler etc. which cool the air compressed by (not shown). Here, as shown in FIG. 4, the heat exchanger 15 is configured to protrude upward through the opening 16 </ b> D of the building cover 16, without being accommodated in the building cover 16 described later.

  A building cover 16 is provided between the cab 10 and the counterweight 11 and is provided on the revolving frame 5. The building cover 16 accommodates the power source 12 and the like. Here, as shown in FIG. 4 and the like, the building cover 16 extends on the left side frame 7 of the revolving frame 5 in the front and rear directions, and on the right side frame 8 in the front and rear directions. The right side surface plate 16B and the upper surface plate 16C as the upper surface portion extending horizontally between the upper end portions of the left and right side surface plates 16A and 16B are roughly configured, and the rear side of the building cover 16 is defined by the counterweight 11 It is blocked.

  In the building cover 16, the above-described power source 12 and the like are accommodated, and an opening 16 </ b> D for performing inspection work on the power source 12 is formed in the upper surface plate 16 </ b> C of the building cover 16. In this case, the opening 16D of the building cover 16 is formed as a rectangular opening extending in the left and right directions, and the upper portion of the heat exchanger 15 or the like that cannot be accommodated in the building cover 16 is located above the opening 16D. It protrudes above the face plate 16C. The opening 16D of the building cover 16 is configured to be covered with an engine cover 17 described later.

  Reference numeral 17 denotes an engine cover provided on the upper surface plate 16C of the building cover 16. The engine cover 17 extends leftward and rightward on the upper surface plate 16C and covers the opening 16D. Here, the engine cover 17 is configured as a two-part engine cover including a small cover 18 and a large cover 19 which will be described later.

  Reference numeral 18 denotes a small cover constituting the right side portion of the engine cover 17, and the small cover 18 is detachably fixed to the upper surface plate 16C of the building cover 16 using bolts or the like (not shown). Here, as shown in FIGS. 3 to 6, the small cover 18 is surrounded by the front plate portion 18A, the rear plate portion 18B, the right side plate portion 18C, and the upper plate portion 18D, and is arranged in the width direction (left and right direction). It is formed in a quadrangular lid shape having a length dimension A1, a length dimension B1 in the orthogonal direction (front and rear directions) orthogonal to the width direction, and a height dimension H1 in the upper and lower directions (see FIG. 2).

  As shown in FIG. 4, the small cover 18 covers a portion of the power source 12 that does not require inspection work, such as the exhaust pipe 13B of the engine 13, the silencer 13C, the hydraulic pump 14, and the like. By setting the dimension H <b> 1 to be small, the rear view of the operator in the cab 10 can be as large as possible. Further, as shown in FIGS. 3 and 4, the left end side (left and right side) of the small cover 18 is located above and below the large cover 19 when the large cover 19 described later is in the closed position. The overlapping portion 18E is overlapped in the direction, and the overlapping portion 18E is provided with guide brackets 22 described later.

  Reference numeral 19 denotes a large cover constituting the left side portion of the engine cover 17, and the large cover 19 is rotatably attached to the upper surface plate 16 </ b> C of the building cover 16 using a hinge member 20 described later. It rotates between an open position for opening 16D (position in FIG. 6) and a closed position for closing the opening 16D of the building cover 16 (position in FIG. 5).

  Here, the large cover 19 is surrounded by a front plate portion 19A, a rear plate portion 19B, a left side plate portion 19C, a right side plate portion 19D, and an upper plate portion 19E as shown in FIGS. , Right direction) in a rectangular lid shape having a length dimension A 2, a length dimension B 2 in the orthogonal direction (front and rear directions) orthogonal to the width direction, and a height dimension H 2 in the upper and lower directions (see FIG. 2). Is formed. In this case, the length dimension B2 in the front and rear directions of the large cover 19 is set larger than the length dimension B1 in the front and rear directions of the small cover 18 (B2> B1), and the height dimension H2 of the large cover 19 is set. Is set larger than the height dimension H1 of the small cover 18 (H2> H1).

  One end side (left end side) in the width direction of the large cover 19 opposite to the small cover 18 is a mounting portion 19F, and the mounting portion 19F is a building via front and rear hinge members 20 and 20. The cover 16 is rotatably attached to the upper surface plate 16C. Accordingly, the other side (right side) in the width direction adjacent to the small cover 18 of the large cover 19 is a free end 19 </ b> G that rotates upward and downward about the hinge member 20.

  The large cover 19 covers a part of the power source 12 that requires inspection work, for example, the left side portion of the engine 13, the heat exchanger 15, and the like. By setting the height dimension larger than the height dimension H1, as shown in FIG. 4, the heat exchanger 15 and the like protruding upward from the opening 16D of the building cover 16 can be covered.

  A concave portion 19H corresponding to the outer shape of the small cover 18 is formed on the right side plate portion 19D located on the free end 19G side of the large cover 19. When the large cover 19 is in the closed position, as shown in FIGS. 3 and 4, the concave portion 19H of the large cover 19 is fitted to the left end side of the small cover 18 from above, so that the large cover 19 A part (right end side) of the free end 19G overlaps the left end side of the small cover 18 in the upward and downward directions.

  Reference numeral 21 denotes a cushioning material attached to the peripheral edge portion of the recessed portion 19H provided in the large cover 19, and the cushioning material 21 is formed in a band shape by an elastic body such as rubber and is bonded to the peripheral portion of the recessed portion 19H. It is fixed using such means. The cushioning material 21 elastically contacts the surface of the small cover 18 when the large cover 19 is closed and the recessed portion 19H is fitted to the left end side of the small cover 18. Thus, the concave portion 19H can be prevented from coming into direct contact with the surface of the small cover 18, and the gap between the concave portion 19H and the small cover 18 can be closed.

  22 and 22 are front and rear guide brackets provided in the overlapping portion 18E on the left end side of the small cover 18, and the guide brackets 22 are respectively in the closed position as shown in FIGS. Alternatively, a bracket 24, which will be described later, provided on the large cover 19 abuts when in the vicinity of the closed position.

  Here, as shown in FIGS. 8 and 9, the guide bracket 22 is formed in a substantially J shape as a whole by bending a steel plate material, and is attached to the upper plate portion 18 </ b> D of the small cover 18 using a bolt 23. The mounting portion 22A and the guide portion 22B protruding upward from the upper plate portion 18D are roughly configured. In this case, the guide portion 22B is formed by bending a rising surface portion 22C that rises vertically upward from the upper plate portion 18D, and an upper end side of the rising surface portion 22C into an arc shape, and a bracket 24 described later to the rising surface portion 22C. And an arcuate surface portion 22D for guiding.

  24 and 24 are front and rear brackets provided on the inner surface of the right side plate portion 19D constituting the large cover 19, and each bracket 24 is a small cover when the large cover 19 is in the closed position or in the vicinity thereof. The position of the large cover 19 relative to the small cover 18 is suppressed by abutting against the guide portions 22B of the respective guide brackets 22 provided at 18.

  Here, as shown in FIGS. 8 and 9, the bracket 24 is formed by bending a thin steel plate material, and is fixed to the inner side surface of the right side plate portion 19D of the large cover 19 by means such as welding. ing. The bracket 24 has a protruding portion 24A having a triangular cross-sectional shape protruding leftward from the inner surface of the right side plate portion 19D, and the front and rear edge portions of the protruding portion 24A are guide brackets. 22 abuts against the guide portion 22B.

  Thus, when the large cover 19 is rotated from the open position to the closed position, the bracket provided on the large cover 19 even if the large cover 19 is displaced with respect to the small cover 18 due to bending deformation or the like. 24 is configured to be able to correct the positional deviation of the large cover 19 by moving downward while contacting the guide portion 22B of the guide bracket 22 provided on the small cover 18.

  On the other hand, when the large cover 19 is rotated from the closed position to the open position, the bracket 24 of the large cover 19 moves upward while coming into contact with the guide portion 22B of the guide bracket 22 provided on the small cover 18. As a result, the cushioning material 21 attached to the recessed portion 19H of the large cover 19 is prevented from being pressed against the surface of the small cover 18 by bending deformation of the large cover 19, and the large cover 19 is smoothly rotated to the open position. It can be moved.

  Reference numerals 25 and 25 denote two handles provided on the upper plate portion 19E of the large cover 19, which are gripped when an operator who has moved up on the building cover 16 opens and closes the large cover 19. Is to do. Here, each handle 25 is provided on the free end 19G side of the large cover 19 so as to be separated from the front and the rear, and the operator usually holds one of the front and rear handles 25 and rotates the large cover 19. It is the composition which makes it.

  The hydraulic excavator 1 according to the present embodiment has the above-described configuration. The hydraulic excavator 1 is self-propelled to the work site by the lower traveling body 2 and then lifts the working device 4 while turning the upper revolving body 3. The excavation work of earth and sand is performed by moving it.

  Next, in order to inspect the engine 13, the heat exchanger 15 and the like of the power source 12 housed in the building cover 16, the large cover 19 is rotated from the closed position shown in FIG. 5 to the open position shown in FIG. When moving, the worker goes up on the upper surface plate 16D of the building cover 16, grips one of the grips 25 provided on the large cover 19, and lifts it upward. Thereby, the free end 19G of the large cover 19 rotates from the closed position to the open position with the hinge member 20 as the center, and the opening 16D of the building cover 16 can be opened.

  In this case, as shown in FIGS. 7 to 9, when the large cover 19 is in the closed position, the bracket 24 provided on the large cover 19 rises to constitute the guide portion 22B of the guide bracket 22 provided on the small cover 18. It is in contact with the surface portion 22C. Thereby, for example, even if an operator grips one of the handles 25 provided on the large cover 19 and rotates the large cover 19 to the open position, the large cover 19 is deformed by bending deformation or the like. It is possible to reliably suppress the displacement of the position.

  Therefore, when the large cover 19 is rotated from the closed position to the open position, the cushioning material 21 attached to the recessed portion 19H of the large cover 19 can be prevented from being pressed against the surface of the small cover 18. As a result, the contact surface pressure between the cushioning material 21 and the small cover 18 can be reduced, and the large cover 19 can be smoothly rotated to the open position. Therefore, the opening portion 16D of the building cover 16 is opened and the engine 13, Workability when checking the heat exchanger 15 and the like can be improved. Further, it is possible to prevent the cushioning material 21 attached to the recessed portion 19H of the large cover 19 from being worn at an early stage due to friction with the small cover 18, and the concave portion 19H of the large cover 19 and the small cover 18 can be prevented from wearing. The gap formed in the fitting portion can be reliably closed by the buffer material 21.

  On the other hand, after the inspection work for the engine 13, the heat exchanger 15 and the like is completed, the operator rotates the large cover 19 from the open position to the closed position in order to close the opening 16D of the building cover 16.

  In this case, for example, when an operator grips one of the grips 25 provided on the large cover 19, the large cover 19 is bent and deformed, so that the front, It will be displaced backwards.

  On the other hand, in the present embodiment, when the large cover 19 is rotated from the open position to the closed position, the bracket 24 provided on the right side plate portion 19D of the large cover 19 is replaced with the guide bracket provided on the small cover 18. It moves downward while coming into contact with the 22 guide portions 22B. In this case, as shown in FIG. 8, the bracket 24 is brought into contact with the arc surface portion 22D constituting the guide portion 22B, and is then guided to the rising surface portion 22C along the arc surface portion 22D. It is possible to correct the positional deviation in the front and rear directions of the large cover 19 with respect to the front cover.

  As a result, the large cover 19 can be moved to the closed position without being displaced with respect to the small cover 18, and the recessed portion 19H of the large cover 19 is fitted to the surface of the small cover 18 without a gap. Can do.

  Thus, according to the present embodiment, the guide bracket 22 having the guide portion 22B protruding upward is provided in the overlapping portion 18E that overlaps the large cover 19 of the small cover 18, and the right side plate of the large cover 19 is provided. The bracket 24 is provided in the portion 19D, and the bracket 24 is configured to contact the guide portion 22B of the guide bracket 22 when the large cover 19 is in the closed position or in the vicinity thereof.

  Thereby, even if the large cover 19 is displaced with respect to the small cover 18 due to bending deformation or the like, the displacement of the large cover 19 can be suppressed by the contact between the guide portion 22B of the guide bracket 22 and the bracket 24. it can. As a result, the large cover 19 can be smoothly rotated between the open position and the closed position, and workability when the opening 16D of the building cover 16 is opened to check the engine 13, the heat exchanger 15, and the like. Can be increased.

  Next, FIG. 10 shows a second embodiment of the present invention, and the feature of this embodiment is that the guide portion of the guide bracket is constituted by an inclined surface portion extending obliquely upward from the small cover. In the present embodiment, the same components as those in the first embodiment described above are denoted by the same reference numerals, and the description thereof is omitted.

  In the figure, 31 is a guide bracket provided in the overlapping portion 18E of the small cover 18, and the guide bracket 31 is used in this embodiment instead of the guide bracket 22 according to the first embodiment.

  Here, the guide bracket 31 is formed in a substantially L shape as a whole by bending a steel plate material, and includes an attachment portion 31A attached to the upper plate portion 18D of the small cover 18 using the bolt 23, and the upper plate portion 18D. It is comprised by the inclined surface part 31B as a guide part which protrudes upwards. In this case, the inclined surface portion 31B extends obliquely upward from the small cover 18, and is gradually separated from the bracket 24 of the large cover 19 from the lower end side toward the upper end side.

  Thus, when the large cover 19 is rotated between the open position and the closed position, the bracket provided on the large cover 19 even if the large cover 19 is displaced forward and backward with respect to the small cover 18. The reference numeral 24 reliably contacts the inclined surface portion 31B of the guide bracket 31 and can move along the inclination of the inclined surface portion 31B.

  For this reason, when the large cover 19 is rotated from the open position to the closed position, the displacement of the large cover 19 with respect to the small cover 18 can be gradually corrected toward the closed position. The operation can be performed smoothly. Further, when the large cover 19 is in the closed position, the displacement of the large cover 19 is minimized, so that the large cover 19 can be easily rotated from the closed position to the open position.

  Next, FIG. 11 shows a third embodiment of the present invention, and the feature of this embodiment is that the guide portion of the guide bracket is constituted by a curved surface portion that extends upward while being curved from the small cover. . In the present embodiment, the same components as those in the first embodiment described above are denoted by the same reference numerals, and the description thereof is omitted.

  In the figure, reference numeral 32 denotes a guide bracket provided in the overlapping portion 18E of the small cover 18. The guide bracket 32 is used in this embodiment in place of the guide bracket 22 according to the first embodiment.

  Here, the guide bracket 32 is formed in an approximately L shape as a whole by bending a steel plate material, and includes an attachment portion 32A attached to the upper plate portion 18D of the small cover 18 using the bolts 23, and the upper plate portion 18D. It is comprised by the curved surface part 32B as a guide part which protrudes upwards. In this case, the curved surface portion 32B extends upward while curving in a circular arc shape from the small cover 18, and is gradually separated from the bracket 24 of the large cover 19 from the lower end side toward the upper end side.

  Thus, when the large cover 19 is rotated between the open position and the closed position, the bracket provided on the large cover 19 even if the large cover 19 is displaced forward and backward with respect to the small cover 18. 24 can contact the curved surface portion 32B of the guide bracket 32 reliably and can move along the curved surface portion 32B.

  For this reason, when the large cover 19 is rotated from the open position to the closed position, the displacement of the large cover 19 with respect to the small cover 18 can be gradually corrected toward the closed position. The operation can be performed smoothly. Further, when the large cover 19 is in the closed position, the displacement of the large cover 19 is minimized, so that the large cover 19 can be easily rotated from the closed position to the open position.

  In the first embodiment described above, two handles 25 are provided on the free end 19G side of the large cover 19 so as to be separated from the front and rear, and the overlapping portion 18E of the small cover 18 is separated from the front and rear. In this example, two guide brackets 22 are provided, and the right side plate portion 19D of the large cover 19 is provided with two brackets 24 separated from the front and rear.

  However, the present invention is not limited to this. For example, as in the modification shown in FIG. 12, the free end 19G of the large cover 19 is orthogonal to the width direction of the large cover 19 (front and rear directions). One handle 25 is provided on one side (front side), one guide bracket 22 is provided on the other side (rear side) in the orthogonal direction of the overlapping portion 18E of the small cover 18, and the right side of the large cover 19 is provided. It is good also as a structure which provides the one bracket 24 in the other side (rear side) of the said orthogonal | vertical direction among board part 19D.

  In this case, the rear side of the large cover 19 tends to bend and deform by gripping the handle 25 provided on the front side of the free end 19G, but the rear side of the right side plate portion 19D of the large cover 19 is provided. Since the bracket 24 abuts on the guide bracket 22 provided on the rear side of the overlapping portion 18E of the small cover 18, the positional deviation of the large cover 19 with respect to the small cover 18 can be suppressed.

  In the first embodiment described above, the small cover 18 and the large cover 19 that cover the engine 13 and the like are mounted by mounting the engine 13 on the turning frame 5 in a horizontally placed state extending in the left and right directions. Exemplifies a configuration extending in the left and right directions, and the left and right directions are described as the width directions of the small cover 18 and the large cover 19. However, the present invention is not limited to this. For example, by placing the engine in a vertically placed state extending in the front and rear directions, the small cover and the large cover are arranged to extend in the front and rear directions. Also good. In this case, the front and rear directions are the width direction of the small cover and the large cover, and the large cover is pivotally attached to the building cover with one side of the front and rear directions attached to the building cover. The other side is the free end.

  Moreover, in 1st Embodiment mentioned above, the case where the small cover 18 is fixed to the building cover 16 using the volt | bolt etc. is mentioned as an example. However, the present invention is not limited to this, and for example, the small cover 18 may be rotatably attached to the building cover 16 using a hinge member or the like.

  Furthermore, in the above-described embodiment, the hydraulic excavator 1 is taken as an example of the construction machine. However, the present invention is not limited to this, and for example, a construction machine that houses a power source in a building cover such as a wheel loader or a hydraulic crane. Can be widely applied.

1 is a front view showing a hydraulic excavator according to an embodiment of the present invention. It is the left view which looked at the engine cover etc. from the arrow II-II direction in FIG. It is a top view which expands and shows the small cover, large cover, etc. which comprise an engine cover. It is sectional drawing which looked at the inside of a building cover from the arrow IV-IV direction in FIG. It is a perspective view which shows a building cover, an engine cover, etc. It is the perspective view which looked at the state which opened the large cover of the engine cover from the same position as FIG. It is sectional drawing which looked at the small cover, the large cover, the guide bracket, the bracket, etc. from the arrow VII-VII direction in FIG. It is the expanded sectional view which expanded the guide bracket, bracket, etc. in FIG. It is an expanded sectional view which looked at the guide bracket, the bracket, etc. from the arrow IX-IX direction in FIG. It is an expanded sectional view similar to FIG. 8 which shows the guide bracket etc. by 2nd Embodiment. It is an expanded sectional view similar to FIG. 8 which shows the guide bracket etc. by 3rd Embodiment. It is the top view seen from the same position as FIG. 3 which shows the arrangement | positioning of the guide bracket by the modification, a bracket, and a handle.

Explanation of symbols

1 Excavator (construction machine)
DESCRIPTION OF SYMBOLS 2 Lower traveling body 3 Upper revolving body 5 Turning frame 12 Power source 13 Engine 14 Hydraulic pump 15 Heat exchanger 16 Building cover 16D Opening 17 Engine cover 18 Small cover 19 Large cover 19F Mounting part 19H Free end 20 Hinge member 21 Buffer material 22, 31, 32 Guide bracket 22B Guide portion 23 Bolt 24 Bracket 25 Handle 31B Inclined surface portion (guide portion)
32B Curved surface part (guide part)

Claims (2)

A frame forming a support structure, a power source including an engine provided in the frame, and an opening provided in the frame for accommodating the power source and inspecting the power source is formed in an upper surface portion. And an engine cover provided on an upper surface portion of the building cover and covering the opening. The engine cover has a small cover with a small height and a height larger than the small cover. In a construction machine composed of a large cover that can be opened and closed,
The small cover is provided with a guide bracket having a guide portion,
A construction machine characterized in that the large cover is provided with a bracket that abuts against a guide portion of the guide bracket so as to suppress a displacement of the large cover with respect to the small cover. The large cover is rotatably attached to the building cover with one side in the width direction opposite to the small cover as an attachment portion, and the other side in the width direction adjacent to the small cover is a free end. Configure
Provided on at least one side in the orthogonal direction perpendicular to the width direction of the free end side of the large cover is a handle for gripping the large cover when rotating.
The construction machine according to claim 1, wherein the guide bracket and the bracket are provided on the other side in the orthogonal direction.

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