JP2007217922A - Construction machinery - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve the workability of detection and maintenance by greatly exposing a heat exchanger, a hydraulic oil tank, a fuel tank, etc., and to enable a plurality of covers to be locked with one key. <P>SOLUTION: An upper structure 3 is provided with an integrated right cover 30 which concurrently covers the three surfaces, that is, the right side surface part, top surface part and front surface part of the equipment such as the heat exchanger 11, the hydraulic oil tank 12, the fuel tank 13 and a battery 17. This enables the respective pieces of equipment to be greatly exposed to the outside only by opening one right cover 30, and facilitates the detection and the maintenance. A fuel filler cover 34 is openably/closably provided in the integrated right cover 30; and work for feeding oil into the fuel tank 13, and an operation of a locking mechanism 33 for the right cover 30 can be performed by opening the fuel filler cover 34. Thus, the work for feeding the oil into the fuel tank 13 can be easily performed, and the right cover 30 can also be locked with a key cylinder 36 for locking the fuel filler cover 34. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a construction machine such as a hydraulic excavator, and more particularly to a construction machine provided with a cover that covers devices on a swing frame.

  In general, a hydraulic excavator is known as a construction machine. The hydraulic excavator includes a lower traveling body that can be self-propelled, an upper revolving body that is rotatably mounted on the lower traveling body, and an upper revolving body. It is roughly constituted by a working device provided at the front part so as to be able to move up and down in the upward and downward directions.

  Here, the upper swing body includes a swing frame to which a working device is attached at a front portion, an engine mounted on the rear side of the swing frame and driving a hydraulic pump, and is positioned on the right side of the engine on the swing frame. A heat exchanger provided, a tank of hydraulic oil and fuel provided on the right side of the swivel frame located on the front side of the heat exchanger, a driver seat provided on the swivel frame and seated by an operator, It is generally configured by a floor plate laid on the front side of the driver's seat and an exterior cover that covers the engine, heat exchanger, tank, and the like.

  Here, the hydraulic excavator includes an ultra-small hydraulic excavator called a mini excavator, and the exterior cover of the small excavator extends along the periphery of the swivel frame so as to cover between the swivel frame and the floor plate. The skirt cover, an engine cover located at the rear and covering the engine, and a right cover located on the right side of the driver's seat and covering the heat exchanger, the hydraulic oil tank, etc. are roughly configured (see, for example, Patent Document 1). ).

Japanese Patent Laid-Open No. 2001-3388

  The small excavator is also equipped with a heat exchanger cover that opens and closes the front side of this heat exchanger so that the heat exchangers such as radiators and oil coolers placed on the right rear side can be inspected and maintained. (See, for example, Patent Document 2).

Japanese Patent Laid-Open No. 2000-291058

  Furthermore, some small hydraulic excavators include a side cover that covers the sides of equipment such as a heat exchanger and a hydraulic oil tank, and a top cover that covers the upper side and the front side of the equipment. A large work space is provided by opening (see, for example, Patent Document 3).

JP 2001-279715 A

  By the way, in the inventions of Patent Document 1 and Patent Document 2 described above, when checking and servicing the heat exchanger, hydraulic oil tank, battery, etc., the right cover is opened, the skirt cover is removed, the heat exchanger cover There is a problem that workability is poor. In addition, the hinge mechanism that supports the cover so that it can be opened and closed requires an installation space and an operation space. Therefore, when a plurality of hinge mechanisms are provided on a small hydraulic excavator, it is difficult to reduce the size. There is.

  Further, in recent hydraulic excavators, a three-column type and a four-column type canopy provided with a pillar on the front side are used in order to increase the safety at the time of falling. However, as in the invention of Patent Document 1, in a structure that opens and closes from the upper side to the front side by lifting the rear part with the front part of the right cover as a fulcrum, the pillar cannot be used to open the right cover. There's a problem.

  On the other hand, in the invention of Patent Document 3, only the side surfaces of the devices can be inspected and maintained only by opening the side covers that cover the sides of the devices such as the heat exchanger and the hydraulic oil tank. For this reason, when inspecting and servicing equipment, the top cover must also be opened, and there is a problem that workability is poor as in the inventions of Patent Document 1 and Patent Document 2.

  Furthermore, since each patent document has a plurality of covers that can be opened and closed, it is necessary to attach a key to each cover in order to prevent mischief, and work during assembly, inspection, and maintenance There is a problem that it causes a decrease in performance and an increase in manufacturing cost.

  The present invention has been made in view of the above-described problems of the prior art, and the object of the present invention is to easily expose a heat exchanger, a hydraulic oil tank, a fuel tank, etc., for inspection and maintenance. The object is to provide a construction machine capable of improving workability.

  Another object of the present invention is to provide a construction machine capable of locking a plurality of covers with a single key.

  A construction machine according to the present invention includes a vehicle body frame to which a working device is attached at a front portion, an engine mounted on a rear side of the vehicle body frame and driving a hydraulic pump, and is provided on the vehicle body frame on the right side of the engine. A heat exchanger, a tank for storing hydraulic oil and fuel located on the right side of the vehicle body frame and positioned on the front side of the heat exchanger, and a right-side device including the heat exchanger, hydraulic oil tank, and fuel tank And a right cover that covers things.

  In order to solve the above-mentioned problem, the feature of the configuration adopted by the invention of claim 1 is that the right cover simultaneously covers three surfaces including the right side surface portion, the upper surface portion, and the front surface portion of the devices. It is formed as a right cover, and the integrated right cover is configured to open and close laterally with the rear portion as a fulcrum.

  According to a second aspect of the present invention, a heat exchanger bracket for supporting the heat exchanger is provided at a rear portion of the revolving frame, and a rear portion of the integrated right cover is rotatably attached to the heat exchanger bracket. It is in that.

  According to a third aspect of the present invention, the integral right cover is provided with a refueling port cover that can be opened and closed at a position corresponding to the refueling port of the fuel tank.

  According to a fourth aspect of the present invention, the integral right cover is provided with a lock mechanism for the integral right cover at a position that can be operated when the filler opening cover is opened.

  According to the invention of claim 1, on the right side of the body frame, a right cover that covers devices such as a heat exchanger, a hydraulic oil tank, and a fuel tank is provided, and the right cover includes a right side surface portion of these devices, It is formed as an integral right cover that simultaneously covers three surfaces including the upper surface portion and the front surface portion. Therefore, by opening one integrated right cover, a wide range of the right side, upper side and front side of the heat exchanger, hydraulic oil tank, fuel tank, etc. can be exposed to the outside simultaneously.

  As a result, when inspecting and servicing equipment, it can be performed simply by opening the integrated right cover, and workability can be improved. Further, since only one integral right cover needs to be attached to the right side of the vehicle body frame, the number of parts such as a hinge mechanism can be reduced, and assembling workability can be improved.

  In addition, since the integrated right cover is configured to open and close laterally with the rear portion as a fulcrum, the integrated right cover can be opened and closed using a strength member provided on the rear side of the vehicle body frame. Can do. In addition, even if a canopy pillar or the like is placed on the front side, the integrated right cover can be opened, so a high-strength three-column, four-column canopy can be used, and safety during a fall is ensured. Can be increased.

  According to the second aspect of the present invention, the rear part of the integral right cover can be pivotably attached using the heat exchanger bracket provided at the rear part of the revolving frame. As a result, it is not necessary to provide a separate bracket for the cover, and the number of parts can be reduced.

  According to the invention of claim 3, the integral right cover is large in size to cover equipment such as a heat exchanger, a hydraulic oil tank, and a fuel tank. The fuel filler opening can be exposed to the outside by opening the mouth cover. Thereby, the fuel supply operation to the fuel tank can be easily performed.

  According to the fourth aspect of the present invention, the integral right cover can be opened by opening the filler opening cover and releasing the lock mechanism. Further, the lock mechanism can be hidden by closing the integral right cover, fixing the lock mechanism, and closing the filler opening cover. Therefore, when a key is provided on the filler cover, both the filler cover and the integrated right cover can be locked with a single key, so the number of parts can be reduced during assembly, inspection, and maintenance. It is possible to improve workability and reduce manufacturing costs.

  The construction machine according to the embodiment of the present invention will be described in detail with reference to FIGS.

  In FIG. 1, reference numeral 1 denotes a canopy-type hydraulic excavator. The hydraulic excavator 1 is mounted on a crawler-type lower traveling body 2 capable of self-propelling, and can be pivoted on the lower traveling body 2. Together with the upper swing body 3 constituting the vehicle body, a working device 4 provided on the front side of the upper swing body 3 so as to be swingable and elevating, and a soil removal device 5 provided on the front side of the lower traveling body 2. It is roughly constituted by.

  Further, the upper swing body 3 is formed very compact corresponding to the vehicle size of the hydraulic excavator 1. The upper swing body 3 includes a swing frame 6, an engine 7, a hydraulic pump 8, a hydraulic oil tank 12, a fuel tank 13, a battery 17, a driver seat 20, an exterior cover 27, and the like which will be described later.

  Reference numeral 6 denotes a revolving frame as a vehicle body frame that forms a support structure of the upper revolving structure 3. As shown in FIG. 2, the revolving frame 6 includes a bottom plate 6A formed using a thick steel plate, and left and right vertical plates erected on the bottom plate 6A so as to extend forward and backward. 6B, left and right side frames 6C provided to extend left and right on both left and right sides of each vertical plate 6B, and a plurality of overhanging beams connecting the vertical plate 6B and the side frame 6C. 6D and a support bracket 6E that is provided at the front end portion of each of the vertical plates 6B and supports the swing type work device 4 are roughly configured.

  Reference numeral 7 denotes an engine mounted on the rear side of the revolving frame 6 (see FIG. 2). The engine 7 is arranged in a horizontal state extending in the left and right directions, and a cooling fan 7A is provided on the right side thereof. A hydraulic pump 8 driven by the engine 7 is attached to the left side of the engine 7, and the hydraulic pump 8 is connected to a hydraulic oil tank 12 and a control valve 14 which will be described later via a hydraulic hose (not shown). It is connected to the.

  Reference numeral 9 denotes a counterweight located on the rear side of the engine 7 and attached to the rear portion of the turning frame 6 (see FIG. 1). The counterweight 9 is in a weight balance with the work device 4 and is formed as a heavy object.

  A heat exchanger bracket 10 is erected on the right rear portion of the revolving frame 6, and the heat exchanger bracket 10 is disposed in the right end portion of the counterweight 9 on the right side of the engine 7. As shown in FIG. 5, the heat exchanger bracket 10 disposed at this position can support a later-described heat exchanger 11 disposed on the right side of the engine 7. Moreover, the heat exchanger bracket 10 can be attached with a hinge mechanism 32 to be described later, and can support the rear portion of the right cover 30 via the hinge mechanism 32 so as to be rotatable (can be opened and closed).

  Reference numeral 11 denotes a heat exchanger provided at the right rear portion of the revolving frame 6 so as to face the cooling fan 7A of the engine 7, and the heat exchanger 11 is attached to the heat exchanger bracket 10. The heat exchanger 11 is roughly configured by a radiator 11A located on the rear side and an oil cooler 11B arranged in parallel on the front side of the radiator 11A. On the right side of the radiator 11A, there is disposed a reservoir tank 11C for receiving the engine cooling water corresponding to the expansion when the engine cooling water expands due to a temperature change, or for compensating the engine cooling water that decreases by evaporation. .

  Reference numeral 12 denotes a hydraulic oil tank located on the right side of the swivel frame 6 located on the front side of the heat exchanger 11. The hydraulic oil tank 12 stores therein hydraulic oil supplied to the hydraulic pump 8 and is formed in a box shape using a steel plate or the like. Moreover, the hydraulic oil tank 12 inject | pours hydraulic oil by opening the filling port 12A provided in the upper surface, when exchanging hydraulic fluid.

  Reference numeral 13 denotes a fuel tank located on the front side of the hydraulic oil tank 12 and disposed on the right side of the revolving frame 6, that is, on the right front portion of the revolving frame 6. The fuel tank 13 is formed in a deformed shape using a resin material or the like so that the capacity can be increased. In addition, a fuel supply port 13A is provided in the upper portion of the fuel tank 13, and the fuel supply port 13A is normally closed with a cap 13B.

  Reference numeral 14 denotes a control valve provided at the left front portion of the swing frame 6, and the control valve 14 includes a plurality of hydraulic pilot type spool valves that are driven in accordance with operations of a work operation lever 21, a travel operation lever 24, and the like described later. Is formed. Reference numeral 15 denotes a center joint provided at the center of the turning frame 6, and 16 denotes a turning motor. Reference numeral 17 denotes a battery mounted on the revolving frame 6 located on the right side of the heat exchanger 11.

  Reference numeral 18 denotes a seat base (see FIGS. 3 and 4) provided so as to cover the upper front side of the engine 7, and 19 denotes a floor board laid on the front side of the seat base 18. Reference numeral 20 denotes a driver seat mounted on the seat base 18, and the driver seat 20 is seated by an operator.

  Reference numeral 21 denotes left and right work operation levers disposed on both the left and right sides of the driver's seat 20, and each work operation lever 21 operates the work device 4 and the like. Each work operation lever 21 is roughly constituted by a console 21A, a pilot valve (not shown), a lever main body 21B, and the like.

  Further, 22 is a switch box provided from the right side to the rear side of the right work operation lever 21, and 23 is a soil removal operation lever provided at the front part of the switch box 22 adjacent to the right side of the right work operation lever 21. Each is shown. The soil removal operation lever 23 is used to swing the soil removal device 5 upward and downward. Reference numeral 24 denotes a traveling operation lever that is located in front of the driver's seat 20 and extends upward from the floor plate 19.

  Reference numeral 25 denotes a canopy provided so as to cover the upper side of the driver's seat 20, and the canopy 25 has higher strength due to the left front pillar 25A, the right front pillar 25B, the left rear pillar (not shown), the right rear pillar 25C, and the roof portion 25D. It is configured as a four-poster canopy with Here, the right front pillar 25B of the canopy 25 is erected at a position close to the right end overlapping the front of the integrated right cover 30 to be described later so that the upper part of the operator seated in the driver's seat 20 can be surely covered. .

  Reference numeral 26 denotes a partition plate that partitions the operator's work space on the driver's seat 20 side from the equipment storage space in which the hydraulic oil tank 12 and the like are provided. The partition plate 26 is formed as a fan-like plate body that extends forward from the lower side of the console 21 </ b> A of the right work operation lever 21 along the left side surface of the hydraulic oil tank 12 and the fuel tank 13. Further, as shown in FIGS. 4 and 8, a mounting base 26 </ b> A is provided on the right side surface of the partition plate 26 for mounting a latch 33 </ b> A of a lock mechanism 33, which will be described later, located above the fuel tank 13. .

  Reference numeral 27 denotes an exterior cover provided on the revolving frame 6 so as to cover the engine 7, the hydraulic pump 8, the heat exchanger 11, the hydraulic oil tank 12, the fuel tank 13, the battery 17, and the like. The exterior cover 27 includes an engine cover 28 that covers the rear side of the engine 7, a left cover (not shown) that covers the engine 7, the hydraulic pump 8, and the like from the left side, and a space between the revolving frame 6 and the floor plate 19 from the front side. The front skirt cover 29 to be covered and an integrated right cover 30 to be described later are roughly configured.

  Reference numeral 30 denotes an integrated right cover according to the present embodiment provided on the right side of the revolving frame 6 (hereinafter, the integrated right cover 30 is simply referred to as the right cover 30). The right cover 30 simultaneously covers three surfaces including a right side surface portion, an upper surface portion, and a front surface portion of devices such as the heat exchanger 11, the hydraulic oil tank 12, the fuel tank 13, and the battery 17. The right cover 30 is configured to open and close in the right lateral direction, which is the horizontal direction, with the rear portion as a fulcrum.

  That is, as shown in FIGS. 3 and 4, the right cover 30 includes a heat exchanger 11, a hydraulic oil tank 12, a fuel tank 13, a side surface 30 </ b> A that covers the right side of the battery 17, a heat exchanger 11, and a hydraulic oil tank. 12, an upper surface portion 30B covering the upper side of the fuel tank 13, a front surface portion 30C covering the front side of the hydraulic oil tank 12 and the fuel tank 13, and a mounting surface portion 30D extending upward and downward at the rear end edge of the side surface portion 30A. It is formed as one irregular plate body made of

  Further, as shown in FIGS. 6 and 7, the right cover 30 has an opening 30 </ b> E so as to remove a portion covering the upper side of the fuel filler opening 13 </ b> A of the fuel tank 13 with the right cover 30 closed. Is formed. The opening 30E is set to a size that allows the fuel to be supplied from the fuel supply port 13A by removing the cap 13B when fuel is supplied to the fuel tank 13.

  Furthermore, a bracket 31 to which a catch 33B of a lock mechanism 33 described later is attached is provided inside the right cover 30. The position where the bracket 31 is provided is a position where the hand can easily be reached from the opening 30E when a fuel filler cover 34 described later is opened. Specifically, as shown in FIG. 8, the bracket 31 is located at a position adjacent to the mounting base 26A of the partition plate 26 when the right cover 30 is closed, that is, on the left side of the opening 30E and above the front surface 30C. It is bolted to. Further, the bracket 31 is formed with a slit 31A located on the right side, and the slit 31A is engaged with an engagement plate 36B when a key cylinder 36 described later is operated for locking.

  Reference numeral 32 denotes a hinge mechanism that supports the rear portion of the integrated right cover 30 so that the rear portion can be opened and closed. The hinge mechanism 32 is composed of an angle member or the like extending upward and downward, and a fixing member 32A bolted to the heat exchanger bracket 10, and a mounting member 30D of the right cover 30 including a plate member or the like extending upward and downward. A movable member 32B which is bolted, and two hinges 32C which are provided at both upper and lower ends of the fixed member 32A and support the movable member 32B so that the movable member 32B can be rotated in the horizontal direction with the upper and lower directions as centerlines. It is comprised by. Further, as shown in FIG. 4, the hinge mechanism 32 is provided with a stopper 32D that fixes the right cover 30 in an open state by being hooked between the fixed member 32A and the movable member 32B.

  Reference numeral 33 denotes a lock mechanism for fixing the right cover 30 in a closed state. The lock mechanism 33 is attached to a mounting base 26A of the partition plate 26 as shown in FIGS. A hook 33 </ b> A bent into a shape and a catch 33 </ b> B attached to the bracket 31 of the right cover 30. The catch 33B includes a hook ring 33B1 that is hooked on the hook 33A and a tongue-like rotary claw 33B2 that tightens the hook ring 33B1.

  Then, the lock mechanism 33 raises the rotating claw 33B2 of the catch 33B with the right cover 30 closed, hooks the hanging ring 33B1 onto the hanging metal fitting 33A, and pulls the rotating claw 33B2 forward, thereby hanging the hook 33B1. The right cover 30 can be fixed (locked) in a closed state by tightening the wheel 33B1. On the other hand, by raising the rotation claw 33B2 and loosening the hanging ring 33B1, the hanging ring 33B1 can be removed from the hanging metal fitting 33A, and the right cover 30 can be unlocked to allow the door to be opened.

  In this way, the lock mechanism 33 is in a place where it cannot be operated from the outside when the filler port cover 34 described later is closed, and when the filler port cover 34 is opened and the opening 30E of the right cover 30 is opened. Only the hand can be inserted through the opening 30E to perform the lock operation and the lock release operation.

  Reference numeral 34 denotes a filler opening cover that opens and closes the opening 30 </ b> E of the right cover 30. The fuel filler cover 34 is formed by a side surface portion 30A, an upper surface portion 30B, a front surface portion 34C, a side surface portion 34A, an upper surface portion 34B, and a front surface portion 34C of the right cover 30. A cylinder mounting recess 34D for attaching a key cylinder 36 described later is formed on the front surface portion 34C of the fuel filler cover 34.

  A hinge mechanism 35 is provided between the upper surface portion 30B of the integrated right cover 30 and the upper surface portion 34B of the filler opening cover 34. The hinge mechanism 35 can open and close the left portion of the filler opening cover 34. It is something to support. Further, as shown in FIG. 7, the hinge mechanism 35 includes a hinge 35A that supports the front and rear directions so as to be pivotable in the left and right directions, and a stopper 35B that fixes the filler opening cover 34 in an opened state. And is roughly composed.

  Reference numeral 36 denotes a key cylinder provided in the cylinder mounting recess 34 </ b> D of the fuel filler cover 34. The key cylinder 36 is locked with the filler cover 34 closed, and can be locked and unlocked by, for example, an engine key (not shown). The key cylinder 36 is attached to the cylinder mounting recess 34D, and is attached to a cylindrical cylinder lock 36A that can be rotated only when an engine key is inserted, and to the tip of the cylinder lock 36A. And an engagement plate 36B that can be rotated by an engine key inserted into the. The engaging plate 36 </ b> B can be engaged with a slit 31 </ b> A of the bracket 31 provided on the right cover 30 by bending the front end side into an L shape.

  Then, the key cylinder 36 closes the filler opening cover 34 and, in this state, inserts the engine key into the cylinder lock 36 </ b> A and rotates it to engage the distal end side of the engagement plate 36 </ b> B with the slit 31 </ b> A of the bracket 31. Thereby, it is possible to lock the opening 30 </ b> E of the right cover 30 with the filler cover 34 closed. Further, by rotating the engine key in the direction opposite to the locking direction, the engagement plate 36B can be disconnected from the slit 31A of the bracket 31 and the locking can be released.

  Thereby, since the fuel filler cover 34 can be opened, the cap 13B of the fuel tank 13 can be removed and fuel can be supplied from the fuel filler 13A. Further, the right cover 30 can be opened by unlocking the lock mechanism 33.

  The hydraulic excavator 1 according to the present embodiment has the above-described configuration, and the operation thereof will be described next.

  First, the operator can drive the lower traveling body 2 by sitting on the driver's seat 20 and operating the traveling operation lever 24. Further, by operating the left and right work operation levers 21, the work device 4 and the like can be operated to perform soil excavation work and the like. Furthermore, by operating the soil removal operation lever 23, the soil removal device 5 and the like can be moved up and down to level the ground, and soil removal work and the like can be performed.

  Next, the case where the fuel supply operation to the fuel tank 13 and the inspection and maintenance operation of the heat exchanger 11, the hydraulic oil tank 12, etc. are performed will be described.

  First, when performing this refueling work, inspection, and maintenance work, it is necessary to open the refueling port cover 34. At this time, the fuel filler cover 34 can be locked by the key cylinder 36, so that theft or mischief of the fuel can be prevented.

  When opening the filler opening cover 34, the engine key is inserted into the cylinder lock 36 </ b> A of the key cylinder 36 and rotated to disengage the engagement plate 36 </ b> B from the slit 31 </ b> A of the bracket 31. Thus, the locking of the filler opening cover 34 can be released, and the filler opening cover 34 can be opened from the upper side to the left side with the hinge mechanism 35 as a fulcrum.

  Here, when fuel is supplied to the fuel tank 13, a hand is inserted through the opening 30 </ b> E of the right cover 30 that is opened by opening the filler opening cover 34, and the cap 13 </ b> B of the fuel tank 13 is removed. Thereby, fuel can be easily supplied to the fuel tank 13 from the fuel supply port 13 </ b> A without opening the large right cover 30 formed from the front part to the rear part of the upper swing body 3.

  Next, when the inspection and maintenance work of the heat exchanger 11, the hydraulic oil tank 12, and the pipes and hoses connected thereto are performed, the catch 33B of the lock mechanism 33 is opened with the filler cover 34 opened. The rotating claw 33B2 is raised to remove the hanging ring 33B1 from the hanging metal fitting 33A, and the lock of the right cover 30 by the locking mechanism 33 is released. As a result, the right cover 30 can open the front side in the right lateral direction with the hinge mechanism 32 attached to the heat exchanger bracket 10 on the rear side as a fulcrum. Here, since the right cover 30 is attached to the heat exchanger bracket 10 for supporting the heat exchanger 11 via the hinge mechanism 32, the existing heat exchanger bracket 10 can be used, and the micro cover is small. The limited excavator 1 can effectively use a limited installation space.

  When the right cover 30 is opened, the three surfaces including the right side portion, the top surface portion, and the front surface portion of the devices such as the heat exchanger 11, the hydraulic oil tank 12, the fuel tank 13, and the battery 17 can be exposed simultaneously. . Specifically, since the lower side of the side surface portion 30A extends to the side frame 6C of the revolving frame 6, the right cover 30 has a hydraulic oil tank 12 and a fuel tank that are in a low and difficult to see position when the right cover 30 is opened. The lower piping and the hose 13 can be exposed, and daily inspection work, maintenance work, and the like can be easily performed. In addition, inspection of pipes and hoses connected to the heat exchanger 11, maintenance work, replenishment work of the reservoir tank 11C, and the like can be performed efficiently. On the other hand, by opening the right cover 30, the filling port 12 </ b> A of the hydraulic oil tank 12 covered by the upper surface portion 30 </ b> B can be exposed, and hydraulic oil, filter replacement work, and the like can be performed.

  On the other hand, when inspection, maintenance work, etc. are completed, the right cover 30 can be fixed in a closed state by closing the right cover 30 and locking the lock mechanism 33. Further, in this state, the filler cover 34 is closed, and the engine key inserted into the cylinder lock 36A of the key cylinder 36 is rotated in the locking direction. Thereby, the filler plate cover 34 can be locked by engaging the engagement plate 36 </ b> B with the slit 31 </ b> A of the bracket 31. At this time, the operation of the lock mechanism 33 can also be restricted by locking the filler cover 34.

  According to the present embodiment configured as described above, the upper swing body 3 includes the right side portion, the upper surface portion, and the front surface portion of the equipment such as the heat exchanger 11, the hydraulic oil tank 12, the fuel tank 13, and the battery 17. An integrated right cover 30 that simultaneously covers the three surfaces is provided. Accordingly, it is possible to expose a wide range of the right side, upper side, and front side of the heat exchanger 11, the hydraulic oil tank 12, the fuel tank 13, the battery 17 and the like to the outside at the same time by simply opening one right cover 30.

  As a result, when the right cover 30 is opened, the piping and hoses under the hydraulic oil tank 12 and the fuel tank 13 which are in a low and difficult to see position can be easily exposed, and daily inspection work and maintenance work can be performed. Etc. can be easily performed. In addition, various pipes connected to the heat exchanger 11, maintenance work of the hose, inspection work of the reservoir tank 11C, replenishment work, and the like can be performed at a time.

  As a result, it is possible to efficiently perform inspection work, maintenance work, repair work, etc. related to the heat exchanger 11, the hydraulic oil tank 12, the fuel tank 13, the battery 17, the piping, the hose, etc., by simply opening one integrated right cover 30. Workability can be improved. Further, in order to provide one right cover 30, it is only necessary to provide one hinge mechanism 32 on the upper swing body 3, so that the number of parts can be reduced and assembly workability can be improved.

  Moreover, the integrated right cover 30 is configured to open and close in the lateral direction with the hinge mechanism 32 at the rear part as a fulcrum. Therefore, even when the right front pillar 25B of the canopy 25 is disposed on the front side of the right cover 30, the right cover 30 can be opened widely without interfering with the right front pillar 25B. As a result, the ultra-compact hydraulic excavator 1 can use the high-strength four-post canopy 25 that has been difficult to apply, and can improve safety, reliability, and the like during a fall.

  Moreover, since the right cover 30 is configured to open and close laterally with the rear portion as a fulcrum, the hinge mechanism 32 can be attached using the existing heat exchanger bracket 10 that fixes the heat exchanger 11. This eliminates the need to wastefully increase the number of brackets, so even if the installation space for equipment is limited, such as the ultra-compact hydraulic excavator 1 according to the present embodiment, the limited installation space is effective. The right cover 30 can be provided.

  On the other hand, the right cover 30 is configured to be provided with a fuel inlet cover 34 that can be opened and closed at a position corresponding to the fuel inlet 13A of the fuel tank 13, so that when the fuel is supplied to the fuel tank 13, a small amount of fuel is supplied. By simply opening the mouth cover 34, the fuel filler port 13A can be exposed to the outside. Thereby, since it is not necessary to open the big right cover 30, the fuel supply operation | work with respect to the fuel tank 13 can be performed easily.

  Further, the right cover 30 is provided with a lock mechanism 33 for the right cover 30 that can be operated from the opening 30E of the right cover 30 when the fuel filler cover 34 is opened. Thereby, when the filler opening cover 34 is closed, the lock mechanism 33 can be hidden. As a result, when the key cylinder 36 is provided in the filler opening cover 34, both the filler opening cover 34 and the right cover 30 can be locked by one key cylinder 36. Therefore, the number of parts can be reduced during assembly. It is possible to improve workability during inspection and maintenance, reduce manufacturing costs, and the like.

  In the embodiment, the case where the integrated right cover 30 is configured to be openably and closably attached to the heat exchanger bracket 10 that supports the heat exchanger 11 has been described as an example. However, the present invention is not limited to this. For example, the right cover 30 may be attached to the counterweight 9. Moreover, it is good also as a structure attached to the bracket provided exclusively so that opening and closing is possible.

  Further, in the embodiment, the case where the present invention is applied to the hydraulic excavator 1 including the four-post canopy 25 covering the upper side of the driver's seat 20 has been described as an example. However, the present invention is not limited to this, and may be applied to, for example, a hydraulic excavator including a three-column type, a two-column type, and a one-column type canopy. Moreover, you may apply to the hydraulic excavator provided with the cab box which covers the circumference | surroundings of the driver's seat 20. FIG.

  On the other hand, in the embodiment, the case where the opening 30E is formed in the front portion of the integrated right cover 30 and the fuel filler cover 34 that opens and closes the opening 30E is described as an example. However, the present invention is not limited to this. For example, the opening 30E and the fuel filler cover 34 may be eliminated. In this case, the fuel can be supplied to the fuel tank 13 by opening the integrated right cover 30.

  Furthermore, in the embodiment, the crawler type hydraulic excavator 1 has been described as an example of the construction machine. However, the present invention is not limited to this, and may be applied to other construction machines such as a wheel type hydraulic excavator. Can do.

It is a front view which shows the hydraulic excavator applied to embodiment of this invention. It is a top view which expands and shows the upper turning body in FIG. 1 in the state which removed the canopy, the exterior cover, the seat base, the floor board, etc. It is a perspective view of the principal part expansion which looked at the upper turning body from the right front side. It is a perspective view of the principal part expansion which shows the upper turning body of FIG. 3 in the state which opened the integrated right cover. It is a perspective view which expands and shows a heat exchanger bracket, a heat exchanger, and a hinge mechanism. It is the perspective view of the principal part expansion which looked at the state which opened the fuel filler cover and exposed the fuel filler and the lock mechanism of the fuel tank from the opening part of the integrated right cover. It is the perspective view of the principal part expansion which looked at the state which opened the fuel filler cover and exposed the fuel filler and lock mechanism of the fuel tank from the opening part of the integrated right cover. It is a principal part expansion perspective view which expands and shows the mounting base of a partition plate, the bracket of an integrated right cover, and a locking mechanism.

Explanation of symbols

1 Excavator (construction machine)
3 Upper swing body 4 Working device 6 Swing frame (body frame)
7 Engine 8 Hydraulic pump 10 Heat exchanger bracket 11 Heat exchanger 11A Radiator 11B Oil cooler 12 Hydraulic oil tank 13 Fuel tank 13A Refueling port 13B Cap 17 Battery 20 Driver's seat 25 Canopy 27 Exterior cover 28 Engine cover 29 Front skirt cover 30 Body right cover 30A Side surface portion 30B Upper surface portion 30C Front surface portion 30D Mounting surface portion 30E Opening portion 31 Bracket 32, 35 Hinge mechanism 33 Lock mechanism 34 Filling port cover 36 Key cylinder

Claims (4)

A vehicle body frame to which a working device is attached at the front, an engine mounted on the rear side of the vehicle body frame to drive a hydraulic pump, a heat exchanger located on the right side of the engine and provided on the vehicle body frame; A tank for storing hydraulic oil and fuel provided on the right side of the vehicle body frame and positioned on the front side of the heat exchanger, and a right cover that covers the right equipment including the heat exchanger, hydraulic oil tank, and fuel tank. In the construction machine provided,
The right cover is formed as an integrated right cover that simultaneously covers three surfaces including a right side surface portion, an upper surface portion, and a front surface portion of the devices,
The construction machine according to claim 1, wherein the integral right cover is configured to open and close in a lateral direction with a rear portion as a fulcrum.   The heat exchanger bracket that supports the heat exchanger is provided at a rear portion of the swivel frame, and a rear portion of the integrated right cover is rotatably attached to the heat exchanger bracket. Construction machinery.   3. The construction machine according to claim 1, wherein the integral right cover is configured so that a fuel filler cover can be opened and closed at a position corresponding to a fuel filler of the fuel tank. The construction machine according to claim 3, wherein the integrated right cover is provided with a lock mechanism for the integrated right cover at a position operable when the filler opening cover is opened.

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