JP4440730B2 - Construction machinery - Google Patents

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.

  In general, 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 a front-rear side of the upper revolving body that can be raised and lowered. And a work device.

  Further, a cab on which an operator rides is mounted on the front side of the swing frame constituting the upper swing body, and on the rear side of the swing frame is a power source including an engine arranged in the longitudinal direction along the drive shaft. It is installed. The upper swing body is provided with a building cover that is positioned on the swing frame to accommodate the power source and the like, and a counterweight is attached to the rear side of the building cover.

  Here, the building cover is roughly constituted by left and right side portions standing along the left and right edge portions of the revolving frame, and an upper surface portion provided between the side portions. . In addition, an opening is provided in the upper surface of the building cover, and the opening projects a power source maintenance operation and protrudes the upper part of the power source that does not fit in the building cover. For this reason, the engine cover for covering up the upper part of the power source which protruded from the opening part is provided in the upper surface part of the building cover.

  The power source is generally constituted by an engine, a hydraulic pump attached to one side in the longitudinal direction of the engine, and a heat exchanger such as a radiator provided on the other side in the longitudinal direction of the engine. . And the power source is a heat exchanger with a heat exchanger, a cooling water hose between the heat exchanger and the engine, various devices driven through a belt, etc. Compared from the opening of the building cover It protrudes greatly. On the other hand, the amount of protrusion is smaller on the hydraulic pump side of the engine where no equipment is provided than on the heat exchanger side.

  Thereby, the height dimension of the engine cover is set in accordance with a heat exchanger, a cooling water hose, and the like that protrude greatly from the opening of the building cover. For example, the engine cover is attached to the upper surface of the building cover by a hinge or the like at one end side in the left and right directions, and is opened by rotating the other side in the left and right directions up and down with the hinge as a fulcrum. , Can be closed.

  Therefore, if the hydraulic excavator becomes large and the power source protrudes greatly from the opening of the building cover, the engine cover becomes large. In this case, since the weight of the engine cover increases, there is a problem that the burden on the operator when opening and closing the engine cover increases.

  Therefore, in order to reduce the burden on the operator when opening and closing the engine cover, there is one in which the engine cover is divided into two cover portions in the longitudinal direction of the power source. In this case, the mounting structure of the engine cover to the building cover is such that one of the divided cover parts is attached to the upper surface part of the building cover so as to be opened and closed via a hinge, and the other cover part is attached to one cover part via the hinge. (For example, refer to Patent Document 1). Other engine covers include a structure in which two divided cover portions are moved in the horizontal direction using rollers and guide rails to open and close (see, for example, Patent Document 2).

JP 2000-104281 A JP 2000-186343 A

  By the way, in patent documents 1 and 2 mentioned above, since the cover part divided into two has almost symmetrical shape, both cover parts are formed high according to a heat exchanger, a cooling water hose, etc. Yes. For this reason, when the operator who boarded the cab looks at the rear, the entire engine cover enters the field of view, which causes a problem that the rear field of view becomes narrow and the workability is lowered.

  Moreover, in the thing by patent document 1, it is set as the structure which attaches one divided | segmented cover part to the upper surface part of a building cover via a hinge, and attaches the other cover part to one cover part via a hinge. Moreover, in the thing by patent document 2, it is set as the structure which moves the two divided | segmented cover parts to a horizontal direction, respectively using a roller and a guide rail.

  Therefore, in any case, it is necessary to assemble a large number of parts in order to attach the engine cover to the upper surface portion of the building cover, resulting in problems such as a decrease in assembly workability and an increase in manufacturing cost.

  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 provide a construction machine capable of reducing the burden when opening and closing the engine cover and improving workability such as maintenance work. It is to provide.

  Another object of the present invention is to provide a construction machine capable of improving workability, safety and the like by widening the rear view during work.

  A construction machine according to a first aspect of the present invention includes a frame constituting a vehicle body, a power source including an engine disposed on the frame in a longitudinal direction along a drive shaft, and the frame on which the power source is accommodated. A building cover having an opening formed in a portion of the upper surface portion where the power source is disposed, and an engine cover provided to close the opening on the upper surface portion of the building cover. Yes.

In order to solve the above-mentioned problem, the feature of the configuration adopted by the invention of claim 1 is that the engine cover is formed so as to protrude upward from the opening , and two cover portions in the longitudinal direction of the engine. The one cover part that covers the part requiring maintenance among the power source is provided on the upper surface part of the building cover via a hinge so as to be openable and closable, and the part of the power source that does not require maintenance is provided. The other cover part to be covered is fixed to the upper surface part of the building cover by a fixing means , and the one cover part that can be opened and closed is orthogonal to the height dimension and the longitudinal direction of the engine than the other cover part. Fits so as to cover the other cover part from the upper side when it is in a closed state that covers the part requiring maintenance while being formed with a large dimension in the width direction. In the notch portion is provided.

According to the invention of claim 2, of the two cover parts constituting the engine cover, one of the cover parts that can be opened and closed is left with the hinges provided on one side of the left and right sides of the vehicle body as fulcrums. The other cover part is provided so as to be opened and closed in the right direction, and is fixed to the upper surface part of the building cover.

According to the invention of claim 3, of the two cover parts constituting the engine cover, one cover part that can be opened and closed is front, with the hinges provided on one side of the front and rear sides of the vehicle body as fulcrums. The other cover part is provided so as to be openable and closable in the rear direction, and is fixed to the upper surface part of the building cover.

According to the invention of claim 4, the power source includes the engine, a hydraulic pump attached to one side in the longitudinal direction of the engine, and a heat exchanger provided on the other side in the longitudinal direction of the engine. The portion of the power source that requires maintenance is a portion on the heat exchanger side of the engine, and the portion of the power source that does not require maintenance is a portion on the hydraulic pump side of the engine. is there.

According to the first aspect of the present invention, the engine cover is formed so as to protrude upward from the opening, and is divided into two cover parts, and one cover part that covers a part of the power source that requires maintenance is provided. It was set as the structure which can be opened and closed in the upper surface part of a building cover . For this reason , when performing maintenance of the power source, for example, replenishing engine cooling water, checking engine oil, refilling engine oil, etc., the operator can open one of the cover parts with a light force and perform maintenance work. It can be done easily.

Moreover, since the other cover part which covers the site | part which does not require a maintenance among power sources can be easily attached to the upper surface part of a building cover using fixing means , such as a volt | bolt, improvement of assembly workability | operativity, Manufacturing cost can be reduced.

Moreover , one cover part which can be opened and closed among the two cover parts which divided | segmented the engine cover was formed larger in height dimension than the other cover part to be fixed . Thus, it is possible to form low only cover part of the other side to be fixed. Thereby, since the back view at the time of work can be widened by the other cover part formed low, workability, safety, etc. can be improved.

Furthermore , one of the two cover portions that can be opened and closed is formed to have a larger dimension in the width direction perpendicular to the longitudinal direction of the engine than the other cover portion to be fixed . Thus, the width dimension of the cover portion of the other side to be fixed can be a small form, the engine cover can be miniaturized.

According to the invention of claim 2, since the one cover part that can be opened and closed uses the hinge provided on one side of the left and right sides of the vehicle body as a fulcrum, the other side of the left and right direction is up and down. By moving, it can be opened and closed in the left and right directions.

According to the invention of claim 3, since the one cover part that can be opened and closed is based on the hinge provided on one side of the front and rear direction of the vehicle body, the other side of the front and rear direction is up and down. By moving, it can be opened and closed forward and backward.

According to the fourth aspect of the present invention, a large heat exchanger, a cooling water hose between the heat exchanger and the engine, and the like are disposed at a site on the heat exchanger side of the engine. The heat exchanger is provided with an engine cooling water filling port and the like, and an engine oil inspection section, a filling port and the like are provided on the engine heat exchanger side. Therefore, when performing maintenance work such as replenishment of engine cooling water, inspection and replenishment of engine oil, various maintenance work can be performed by opening only one cover portion of the engine cover.

  On the other hand, since there are few devices to be inspected in the part on the hydraulic pump side of the engine, the other cover portion covering the hydraulic pump side of the engine can be formed low. Further, since the engine hydraulic pump side portion does not require maintenance, the other cover portion covering the engine hydraulic pump side can be easily attached to the upper surface portion of the building cover using, for example, a bolt or the like. .

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

  First, FIG. 1 to FIG. 6 show a first embodiment of the present invention. In FIG. 1, reference numeral 1 denotes a crawler hydraulic excavator as a construction machine. The hydraulic excavator 1 is mounted on a self-propelled lower traveling body 2 and on the lower traveling body 2 so as to be turnable. 2 is constituted roughly by an upper swing body 3 constituting a vehicle body and a work device 4 provided on the front side of the upper swing body 3 so as to be able to move up and down and performing excavation work of earth and sand.

  Reference numeral 5 denotes a revolving frame constituting the upper revolving structure 3, and the revolving frame 5 is formed as a support structure. As shown in FIG. 4, the swivel frame 5 is roughly constituted by a center frame 6, side frames 7 and 8, and a protruding beam 9 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 and right center beams 6B and 6B extend in the forward and backward directions while facing each other in the right direction. The working device 4 is attached to the front side of each center beam 6B 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 a gap and extends in the front and rear directions, and 8 is a right side frame which is arranged on the right side of the center frame 6 with a gap and which extends in the front and rear directions. Each is shown. 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 (see FIGS. 1 to 3) mounted on the left front side of the revolving frame 5. The cab 10 is mounted by an operator, and a driver's seat on which the operator is seated, various operation levers, etc. (Both not shown) are provided. 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 (see FIG. 4 and the like) is provided on the revolving frame 5 and is located on the front side of the counterweight 11, and the power source 12 is for operating the excavator 1. The power source 12 is roughly constituted by an engine 13, a hydraulic pump 14, a heat exchanger 15 and the like which will be described later.

  Reference numeral 13 denotes an engine that constitutes a main body portion of the power source 12, and the engine 13 has a drive shaft 13A disposed on an axis OO, and is disposed in the longitudinal direction along the drive shaft 13A. Thereby, the engine 13 is mounted on the revolving frame 5 in a horizontally placed state in which the axis OO extends in the left and right directions. Here, a cooling fan 13B is provided on the left side of the engine 13 so as to face a heat exchanger 15 described later, and the cooling fan 13B is connected to the drive shaft 13A via a belt 13C and the like. Further, on the left side of the engine 13 on the heat exchanger 15 side, as shown in FIG. 6, an oil level gauge 13D for checking the amount and deterioration state of the engine oil, and oil filling for replenishing the engine oil A mouth 13E is provided. On the other hand, an exhaust pipe 13F is provided on the right side of the engine 13 on the hydraulic pump 14 side so as to extend to the right side, and a silencer 13G is attached to the tip of the exhaust pipe 13F.

  When the heat exchanger 15 side and the hydraulic pump 14 side are compared, the engine 13 has a high left portion on the heat exchanger 15 side and is formed wide in the front and rear directions perpendicular to the longitudinal direction of the engine 13. The right side portion on the hydraulic pump 14 side is low and is formed narrow in the front and rear directions.

  In this way, the engine 13 is concentrated on the left side which is the heat exchanger 15 side and requires maintenance. That is, a belt 13C that needs to be checked and adjusted for tension, an oil level gauge 13D that checks the amount and deterioration of engine oil, and an oil filling port 13E that replenishes engine oil are arranged on the left side of the engine 13. . On the other hand, the exhaust pipe 13F, the silencer 13G, and the like provided on the right side of the engine 13 on the hydraulic pump 14 side do not require maintenance.

  14 is a hydraulic pump attached to the right side of the engine 13, and the hydraulic pump 14 is driven by a drive shaft 13 </ b> A of the engine 13 to discharge pressure oil toward actuators such as the lower traveling body 2 and the work device 4. To do.

  A heat exchanger 15 is provided on the left side of the engine 13 so as to face the cooling fan 13B. The heat exchanger 15 is, for example, front and rear directions orthogonal to the axis OO of the drive shaft 13A of the engine 13 The radiator, the oil cooler, and the intercooler (all not shown) are arranged side by side so as not to overlap each other. And the radiator which comprises the heat exchanger 15 cools the engine coolant circulated through the coolant hose 15A connected with the water jacket (not shown) of the engine 13. FIG. Further, a cooling water filling port 15B for filling engine cooling water is provided at the upper part of the heat exchanger 15 (radiator). On the other hand, the oil cooler cools the hydraulic oil returned from the actuator or the like of the work device 4. Further, the intercooler cools the air compressed by the turbocharger provided in the engine 13 and supplies this cooling air to an intake manifold (none of which is shown) of the engine 13.

  Here, since the excavator 1 performs work in a substantially stopped state, it is necessary to sufficiently cool the cooling water of the engine 13 only with the cooling air generated by the cooling fan 13B. For this reason, in order to obtain a large heat radiation area, the heat exchanger 15 is formed higher than the engine 13 and wide in the front and rear directions.

  As a result, as shown in FIG. 4, the power source 12 is configured such that the left side portion of the engine 13 and the heat exchanger 15 cannot be accommodated in a later-described building cover 17, and the heat exchanger 15 is located above the opening 17 </ b> C of the building cover 17. Projecting with a projecting dimension P1. On the other hand, the right side portion of the engine 13 is formed lower than the heat exchanger 15, and the silencer 13G and the like disposed on the right side portion has a small protruding dimension P2 above the opening 17C of the building cover 17. It protrudes.

  Reference numeral 16 denotes a condenser mounted so as to overlap the left side of the heat exchanger 15, and the condenser 16 constitutes a part of an air conditioner that supplies conditioned air such as cold air or hot air into the cab 10. is there.

  A building cover 17 is provided between the cab 10 and the counterweight 11 and is provided on the revolving frame 5. The building cover 17 extends horizontally between the left and right side plates 17A and 17A which are located on both the left and right sides of the revolving frame 5 and extend in the front and rear directions, and the upper ends of the side plates 17A. The upper surface plate 17B as an upper surface portion is generally configured, and an opening 17C is formed in the upper surface plate 17B. The rear side of the building cover 17 is closed by the counterweight 11, and the power source 12 and the like are accommodated in the building cover 17.

  Here, the opening 17 </ b> C of the building cover 17 is formed as a rectangular opening that is long in the left and right directions, for example, in a portion where the power source 12 is disposed. And the upper part of the power source 12 which cannot be accommodated in the building cover 17 protrudes from the opening 17C.

  The opening 17C is an opening for performing maintenance work of the power source 12. For example, inspection and adjustment of the tension of the belt 13C provided in the engine 13, engine oil for lubricating internal components of the engine 13 Maintenance work such as inspection of the amount (liquid level) and deterioration state, replenishment of engine oil, replenishment of engine cooling water, and the like. Further, the opening 17 </ b> C is closed so that the left side for performing various maintenance operations can be opened and closed by an opening / closing cover 19 of the engine cover 18 described later, and the right side is fixedly closed by a fixed cover 21.

  Reference numeral 18 denotes an engine cover provided on the upper surface plate 17B of the building cover 17, and the engine cover 18 closes the opening 17C. The engine cover 18 is divided into an opening / closing cover part 19 and a fixed cover part 21 which will be described later in the left and right directions which are the longitudinal direction of the power source 12. Further, the engine cover 18 has an arrangement state of the power source 12, that is, the heat exchanger 15 is arranged on the left side and the hydraulic pump 14 is arranged on the right side. Also, the fixed cover portion 21 located on the right side is formed low. Accordingly, the engine cover 18 is configured as a stepped cover member as a whole.

  Reference numeral 19 denotes an open / close cover portion constituting the left side portion of the engine cover 18. The open / close cover portion 19 covers a portion of the power source 12 that requires maintenance work, that is, the left side portion of the engine 13 and the heat exchanger 15 from above. For this reason, the opening / closing cover part 19 is attached to the upper surface plate 17 </ b> B of the building cover 17 through a hinge 20 which will be described later.

  The opening / closing cover part 19 will be described in detail. The opening / closing cover part 19 closes the front plate part 19A, the rear plate part 19B, the left side plate part 19C, the right side plate part 19D arranged in a frame shape, and the upper parts thereof. The upper plate portion 19E is formed as a box-like body having an opening on the lower side. Further, the right side plate portion 19D is formed with a substantially U-shaped cutout portion 19F which is fitted to the fixed cover portion 21 located on the right side from above. Further, the opening / closing cover portion 19 is attached to the upper surface plate 17B of the building cover 17 so that the left side plate portion 19C can be opened and closed in the left and right directions via a hinge 20 described later.

  Here, the opening / closing cover portion 19 has a length dimension L1 in the front and rear directions perpendicular to the longitudinal direction (axis OO) of the engine 13, a length dimension L2 in the left and right directions, and a height in the up and down directions. It is formed with a dimension H1. The length dimension L1 in the front and rear directions of the opening / closing cover portion 19 is set to a dimension that can cover the wide heat exchanger 15 and the like, and the length dimension L2 in the left and right directions is the length of the power source 12. Among them, the length dimension is set to such a degree that a part requiring maintenance work can be opened and closed, for example, approximately half the length of the entire engine cover 18. Further, as shown in FIG. 4, the height dimension H1 of the opening / closing cover part 19 is set to a dimension that can cover the heat exchanger 15 and the like projecting with the projecting dimension P1 upward from the opening 17C of the building cover 17. Has been.

  As a result, the opening / closing cover portion 19 can be reduced to about half of the weight of the entire engine cover 18, so that when the opening / closing cover portion 19 is opened and closed for maintenance work or the like, the burden on the operator is reduced. Can be reduced.

  Reference numeral 20 denotes a plurality of hinges provided between the upper surface plate 17B of the building cover 17 and the left side plate portion 19C of the opening / closing cover portion 19, and the hinges 20 are separated in the front and rear directions as shown in FIG. For example, two are provided. Each hinge 20 supports the open / close cover portion 19 with the left side in the left and right directions as fulcrums, thereby opening and closing the open / close cover portion 19 in the left and right directions.

  Reference numeral 21 denotes a fixed cover portion constituting the right side portion of the engine cover 18. The fixed cover portion 21 covers a portion of the power source 12 that does not require maintenance work, that is, the right side portion of the engine 13 and the hydraulic pump 14. For this reason, the fixed cover portion 21 is fixedly attached to the upper surface plate 17B of the building cover 17, and the protruding dimension P2 from the opening portion 17C is formed low corresponding to the right side portion of the engine 13.

The fixed cover portion 21 will be described in detail. The fixed cover portion 21 includes a front plate portion 21A, a rear plate portion 21B, a right plate portion 21C, and an upper plate portion 21D that are arranged in a U shape. It is formed to open. In addition, the fixed cover portion 21 has the lower end portions of the front plate portion 21A, the rear plate portion 21B, and the right side plate portion 21C fixed to the upper surface plate 17B of the building cover 17 by using bolts and nuts or by fixing means such as welding. Installed. Accordingly, the fixed cover portion 21 can be easily attached to the building cover 17.

  In addition, the attachment method of the fixed cover part 21 does not need to be physically fixed with respect to the building cover 17. That is, even if the fixed cover portion 21 is not configured to be simply opened and closed using the hinge 20 like the open / close cover portion 19, when the opening / closing operation becomes necessary, for example, the bolt / nut is loosened. The structure which can be removed by is also possible.

  Here, the fixed cover portion 21 has a length dimension L3 in the front and rear directions perpendicular to the longitudinal direction (axis OO) of the engine 13, a length dimension L4 in the left and right directions, and a height in the up and down directions. It is formed with a dimension H2. The length L3 in the front and rear directions of the fixed cover portion 21 corresponds to the right side portion of the narrow engine 13 and is set to be smaller than the length L1 in the front and rear directions of the opening / closing cover portion 19. Has been. Further, the length dimension L4 in the left and right directions is set such that the left end portion overlaps the opening / closing cover part 19 when the opening / closing cover part 19 is closed.

  Furthermore, as shown in FIG. 4, the height dimension H2 of the fixed cover portion 21 is small enough to cover the right side portion of the engine 13 that protrudes upward from the opening 17C of the building cover 17 with a small projection dimension P2. Set to dimensions. Thereby, since the fixed cover part 21 can be formed low corresponding to the right side part of the engine 13, the fixed cover part 21 can provide a wide rear view to the operator in the cab 10.

  The hydraulic excavator 1 according to the first embodiment has the above-described configuration. Next, a description will be given of a case where maintenance work is performed on the engine 13 and the heat exchanger 15 of the power source 12 housed in the building cover 17. To do.

  First, a lock mechanism (not shown) that fixes the open / close cover portion 19 of the engine cover 18 to the fixed cover portion 21 or the upper surface plate 17B of the building cover 17 is released. Next, by lifting the right side part of the opening / closing cover part 19, as shown in FIG. 6, the opening / closing cover part 19 can be opened with the left hinge 20 as a fulcrum. At this time, since the opening / closing cover portion 19 is approximately half the weight of the conventional one, the operator can open and close the opening / closing cover portion 19 easily and safely.

  When the open / close cover 19 is opened, the belt 13C of the engine 13, the oil level gauge 13D, the oil filling port 13E, and the cooling water filling port 15B of the radiator constituting the heat exchanger 15 are exposed. It is possible to perform maintenance work such as checking and adjusting the tension of the engine, checking the amount (liquid level) of engine oil for lubricating the engine 13 and the deterioration state, refilling the engine oil, and refilling the engine cooling water.

  Next, an operation when the excavator 1 according to the first embodiment is operated to perform excavation work and the like will be described.

  First, the operator gets on the cab 10 and sits on the driver's seat. By operating the operation lever for traveling in this state, the crawler of the lower traveling body 2 can be driven to move the hydraulic excavator 1 forward or backward. Further, the operator seated in the driver's seat can perform the excavation work of earth and sand, etc. by operating the operation lever for work to move the working device 4 up and down.

  Here, when the hydraulic excavator 1 is operated, the work is performed while visually confirming the surroundings from within the cab 10. In this case, as shown in FIG. 2, the fixed cover portion 21 corresponding to almost half of the engine cover 18 that obstructs the rear view is formed lower than the open / close cover portion 19. The rear field of view from the cab 10 can be widened by the amount that is lowered.

  Thus, according to the first embodiment, the engine cover 18 is divided into the open / close cover portion 19 and the fixed cover portion 21 in the left and right directions, and the left portion of the power source 12 that requires maintenance (heat exchange). The opening / closing cover portion 19 covering the container 15 side) is configured to be attached to the upper surface plate 17B of the building cover 17 so as to be opened and closed. Therefore, when performing maintenance work on the power source 12, it is only necessary to open and close only the open / close cover portion 19 corresponding to almost half of the engine cover 18, so that the operator when opening and closing the open / close cover portion 19 is opened. The burden can be reduced, and maintenance work can be performed easily and safely.

  Further, the fixed cover portion 21 that covers the right side portion (hydraulic pump 14 side) of the power source 12 that does not require maintenance is fixedly attached to the upper surface plate 17B of the building cover 17. Accordingly, when the fixed cover portion 21 is attached to the building cover 17, it can be easily attached using, for example, bolts and nuts, etc., and assembling workability can be improved and manufacturing costs can be reduced.

  Moreover, the opening / closing cover part 19 and the fixed cover part 21 are configured such that the height dimension H2 of the fixed cover part 21 is lower than the height dimension H1 of the opening / closing cover part 19 in accordance with the arrangement state of the power source 12. . As a result, the rear view from the cab 10 can be widened by the amount that the fixed cover portion 21 is formed low, so that workability, safety, and the like can be improved.

  The fixed cover portion 21 has a front and rear length dimension L3 corresponding to the right side portion of the narrow engine 13 and is smaller than the front and rear length dimension L1 of the opening / closing cover portion 19. Since it forms, the fixed cover part 21 can be reduced in size.

  Further, since the left and right sides of the open / close cover part 19 are attached to the building cover 17 via hinges 20, the open / close cover part 19 is opened and closed in the left and right directions with the hinge 20 as a fulcrum. Can do.

Next, FIGS. 7 to 9 show reference examples of the present invention. The feature of this reference example is that two cover parts constituting the engine cover are formed to have substantially the same height. In the reference example , the same components as those in the first embodiment described above are denoted by the same reference numerals, and the description thereof is omitted.

7 and 8, reference numeral 31 denotes an engine cover according to a reference example. The engine cover 31 is provided on the upper surface plate 17B of the building cover 17, and protrudes from the opening 17C by closing the opening 17C. The upper part of the power source 12 is covered. The engine cover 31 is divided into an opening / closing cover part 32 and a fixed cover part 34, which will be described later, at substantially intermediate positions in the left and right directions. Further, the open / close cover portion 32 and the fixed cover portion 34 are formed in a substantially symmetrical shape in the left and right directions.

  Reference numeral 32 denotes an open / close cover portion that constitutes the left side portion of the engine cover 31, and the open / close cover portion 32 covers the left side portion (on the heat exchanger 15 side) of the power source 12 that requires maintenance work. For this reason, the opening / closing cover part 32 is attached to the upper surface plate 17 </ b> B of the building cover 17 so as to be openable and closable via a hinge 33 described later.

  The open / close cover portion 32 will be described in detail. The open / close cover portion 32 includes a front plate portion 32A, a rear plate portion 32B, a left plate portion 32C and an upper plate portion 32D arranged in a U-shape. It is formed to open. Further, the open / close cover portion 32 has a left side plate portion 32C attached to the upper surface plate 17B of the building cover 17 so as to be openable and closable in the left and right directions via the hinge 33 substantially the same as the hinge 20 according to the first embodiment. Yes.

  Here, since the opening / closing cover portion 32 is set to be approximately half the length of the engine cover 31, the weight of the opening / closing cover portion 32 can be approximately half that of the entire engine cover 31, as shown in FIG. 9. The burden on the operator when opening and closing the opening / closing cover 32 can be reduced.

  Reference numeral 34 denotes a fixed cover portion constituting the right side portion of the engine cover 31. The fixed cover portion 34 covers the right side portion (hydraulic pump 14 side) of the power source 12 that does not require maintenance work. For this reason, the fixed cover portion 34 is fixedly attached to the upper surface plate 17 </ b> B of the building cover 17. The fixed cover portion 34 is formed in a substantially symmetrical shape with the open / close cover portion 32 in the left and right directions.

  The fixed cover portion 34 will be described in detail. The fixed cover portion 34 includes a front plate portion 34A, a rear plate portion 34B, a right plate portion 34C, and an upper plate portion 34D arranged in a U-shape. It is formed to open. In addition, the fixed cover portion 34 can be easily attached to the upper surface plate 17B of the building cover 17 using a means such as bolting or welding at the lower end thereof.

Also in the reference example configured as described above, it is possible to obtain substantially the same function and effect as those of the first embodiment described above. In particular, according to the reference example , the opening / closing cover part 32 and the fixed cover part 34 constituting the engine cover 31 are substantially symmetrical. As a result, the components constituting the power source 12 can be accommodated in the fixed cover portion 34 as well. In addition, when the open / close cover portion 32 is closed, the overall shape of the engine cover 31 can have a sense of unity, and the appearance can be improved.

Next, FIG. 10 and FIG. 11 show a second embodiment of the present invention. The feature of this embodiment is that the one cover part that can be opened and closed of the engine cover is provided so as to be openable and closable in the front and rear directions with one side of the front and rear directions as a fulcrum. 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. 10, reference numeral 41 denotes an engine cover according to the second embodiment, and reference numeral 42 denotes an opening / closing cover part constituting the left side portion of the engine cover 41. The opening / closing cover portion 42 covers the left side portion of the engine 13 requiring maintenance work, and is substantially the same as the opening / closing cover portion 32 according to the first embodiment, the front plate portion 42A, the rear plate portion 42B, the left side portion. The plate portion 42C, the right plate portion 42D, and the upper plate portion 42E are formed to open downward, and the right plate portion 42D is provided with a notch portion 42F. However, the opening / closing cover portion 42 according to the second embodiment is different from the opening / closing cover portion 19 according to the first embodiment in that the opening / closing cover portion 42 is provided so as to be opened and closed forward and backward by a hinge 43 described later. Yes.

  Reference numeral 43 denotes, for example, two hinges provided between the upper surface plate 17B of the building cover 17 and the front plate portion 42A of the opening / closing cover portion 42. Each of the hinges 43 has an opening / closing cover with the front side in the front and rear directions as fulcrums. By supporting the portion 42, the open / close cover portion 42 is opened and closed in the forward and backward directions as shown in FIG.

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, according to the second embodiment, since the rear side of the opening / closing cover part 42 is opened and closed with the front and rear front hinges 43 as fulcrums, the left side is opened when the opening / closing cover part 42 is opened. Maintenance work and the like can be performed from the two directions on the rear side, and workability can be improved.

  In each embodiment, the power source 12 has the engine 13 in a horizontal state extending leftward and rightward, and includes a belt 13C, an oil level gauge 13D, a heat exchanger 15 and the like of the engine 13 that require maintenance. The case where it is arranged on the left side is described as an example. However, the present invention is not limited to this, and for example, a portion of the power source 12 that requires maintenance may be arranged on the right side in the left and right directions. In this case, the open / close cover portion 19 of the engine cover 18 may be disposed on the right side, and the fixed cover portion 21 may be disposed on the left side.

  In addition, the power source 12 may be in a vertically placed state extending in the front and rear directions as in JP-A-10-46625, and in this case, maintenance to be provided on the front side or the rear side is necessary. The open / close cover portion 19 may be arranged on the front side or the rear side according to the belt 13C, the oil level gauge 13D, the heat exchanger 15 and the like of the engine 13.

  Further, in the first embodiment, the radiator, the oil cooler, and the intercooler that constitute the heat exchanger 15 are arranged in a row in the front and rear directions orthogonal to the axis OO of the drive shaft 13A of the engine 13, for example. The case where it is arranged has been described as an example. However, the present invention is not limited to this, and for example, a radiator, an oil cooler, and an intercooler that constitute the heat exchanger 15 are arranged in a row in the left and right directions that are in the direction of the axis OO of the drive shaft 13A. It is good. This configuration can be similarly applied to other embodiments.

On the other hand, in the first embodiment, the open / close cover portion 19 of the engine cover 18 has been described as an example in which the right side is opened and closed with the hinge 20 provided on the left side in the left and right directions as a fulcrum. However, the present invention is not limited to this, and by providing the hinge 20 on the right side of the opening / closing cover part 19, the opening / closing cover part 19 may be configured to open and close the left side with the right hinge 20 as a fulcrum .

In the second embodiment, the open / close cover portion 42 of the engine cover 41 is described as an example in which the rear side is opened and closed with the hinge 43 provided on the front side in the front and rear directions as a fulcrum. . However, the present invention is not limited to this, and by providing the hinge 43 on the rear side of the opening / closing cover portion 42, the opening / closing cover portion 42 may be configured to open and close the front side with the rear hinge 43 as a fulcrum.

  Moreover, in 1st Embodiment, the case where it was set as the structure made to project the power source 12 upwards from the opening part 17C of the building cover 17 was illustrated. However, the present invention is not limited to this. For example, the power source 12 is provided at a position slightly lower than the upper surface plate 17B of the building cover 17, and the engine cover 18 is raised to form a space between the power source 12. It is good also as a structure formed with a thickness. This configuration can be similarly applied to other embodiments.

  Furthermore, in each embodiment, the crawler type hydraulic excavator 1 was described as an example of the construction machine. However, the present invention is not limited to this, and may be applied to, for example, a hydraulic excavator provided with a wheel-type lower traveling body. Further, it can be widely applied to other construction machines such as a hydraulic crane, a wheel loader, and a tractor.

1 is a front view showing a hydraulic excavator according to a first embodiment of the present invention. It is a left view of FIG. 1 which expands and shows a hydraulic shovel. It is a top view which expands and shows a hydraulic shovel. It is sectional drawing which expands and shows the inside of a building cover from the arrow IV-IV direction in FIG. It is an external appearance perspective view of the principal part expansion which shows a counterweight, a building cover, an engine cover, etc. FIG. 6 is an external perspective view of an enlarged main part viewed from the same position as in FIG. 5 in a state in which the opening / closing cover part of the engine cover is opened and the power source is exposed. It is a top view which shows the hydraulic excavator provided with the engine cover by the reference example of this invention. It is an external appearance perspective view of the principal part expansion which shows the engine cover by the reference example of this invention. It is the external appearance perspective view of the principal part expansion which looked at the state which opened the opening-and-closing cover part of the engine cover, and exposed the power source from the same position as FIG. It is a top view which shows the hydraulic excavator provided with the engine cover by the 2nd Embodiment of this invention. It is an external appearance perspective view of the principal part expansion which shows the state which opened the opening-and-closing cover part of the engine cover, and exposed the power source.

Explanation of symbols

1 Excavator (construction machine)
2 Lower traveling body (car body)
3 Upper swing body (car body)
DESCRIPTION OF SYMBOLS 5 Turning frame 12 Power source 13 Engine 14 Hydraulic pump 15 Heat exchanger 17 Building cover 17A Side plate 17B Top plate (upper surface part)
17C Opening 18, 31, 41 Engine cover 19, 32, 42 Opening / closing cover 20, 33, 43 Hinge (fulcrum)
21, 34 Fixed cover part P1 Projection dimension of heat exchanger, etc. P2 Projection dimension of the right side part of the engine L1 Front / rear length dimension of the opening / closing cover part L2 Left / right dimension of the opening / closing cover part L3 fixing Front and rear length dimensions of the cover part L4 Left and right length dimensions of the fixed cover part H1 Opening and closing cover part height dimension H2 Fixed cover part height dimension

Claims (4)

A power source including a frame constituting the vehicle body, an engine disposed on the frame in the longitudinal direction along the drive shaft, and the power source of the upper surface provided on the frame to accommodate the power source In a construction machine comprising: a building cover in which an opening is formed at a portion where is disposed; and an engine cover provided to close the opening on the upper surface of the building cover;
The engine cover protrudes upward from the opening , is divided into two covers in the longitudinal direction of the engine, and one cover that covers a portion of the power source that requires maintenance is a hinge. The other cover part that covers the part of the power source that does not require maintenance is fixed to the upper surface part of the building cover by a fixing means .
The one cover part that can be opened and closed is formed to have a height dimension and a dimension in the width direction perpendicular to the longitudinal direction of the engine larger than those of the other cover part, and covers the part requiring maintenance. A construction machine comprising a notch that is fitted to cover the other cover from above when in a state . Of the two cover parts constituting the engine cover, one cover part that can be opened and closed is provided so that it can be opened and closed in the left and right directions with the hinge provided on one side of the left and right sides of the vehicle body as a fulcrum, The construction machine according to claim 1, wherein the other cover portion is configured to be fixed to an upper surface portion of the building cover. Of the two cover parts constituting the engine cover, one cover part that can be opened and closed is provided so that it can be opened and closed in the front and rear directions with the hinge provided on one side of the front and rear direction of the vehicle body as a fulcrum, The construction machine according to claim 1, wherein the other cover portion is configured to be fixed to an upper surface portion of the building cover. The power source includes the engine, a hydraulic pump attached to one side in the longitudinal direction of the engine, and a heat exchanger provided on the other side in the longitudinal direction of the engine. the site in need of maintenance, the a portion of the heat exchanger side of the engine, parts that do not require maintenance of the power source, according to claim 1, 2 or a portion of the hydraulic pump side of said engine Is the construction machine described in 3 .

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