JPH10140613A - Construction equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate the maintenance work by constituting a counterweight installed to the rear of a revolving superstructure in such a manner as to constitute the outer circumferential surface extending from the upper surface to about the bottom part, and partially cover various equipments arranged on the revolving superstructure from the side surface and rear part, and arranging an engine in a position never surrounded by the counterweight. SOLUTION: In this construction machine, the rear part of a revolving superstructure 5 is covered with a casted counterweight 6 from the rear, side, lower part and upper part to prevent the damage by contact in working in a narrow place. The revolving superstructure 5 is partially covered with the counterweight 6, and a guard member is formed of a plate member, which is made attachable and detachable by the fastening of a bolt. Thus, a hydraulic pump 27, a hydraulic valve 32, and a working oil tank 29 surrounded by the counterweight 6 can be easily maintained by removing the guard plate from above the machine body.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle body of a construction machine such as a hydraulic shovel or a working vehicle.

[0002]

2. Description of the Related Art FIG. 8 is a side view showing an embodiment of a hydraulic excavator described in Japanese Utility Model Laid-Open Publication No. 56-105558. In the hydraulic excavator shown in FIG. 8, a box-shaped balance weight 12 provided with an engine inspection window and a cooling air passage window is attached to a rear portion of the upper revolving unit 2 ', and the engine 9 or the engine is mounted inside the balance weight 12. 9 and a hydraulic pump. As a result, since the thickness of the balance weight 12 is large, propagation of vibration of the engine 9 can be reduced, noise can be reduced, and
Since the balance weight 12 also functions as an engine cover, the engine cover is not required.

FIG. 9 is a perspective view showing a counterweight a provided with an inspection hole 1 described in Japanese Utility Model Laid-Open Publication No. 7-17853 and its vicinity. In the construction machine (hydraulic shovel) shown in FIG. 9, an inspection hole 1 is provided on the side of the counterweight a, and the engine body b and the counterweight a
In the meantime, maintenance work for the engine accessory c is performed with the inspection hole 1 opened. As a result, maintenance work can be easily performed and work efficiency can be further improved. Inspection hole 1 is
The cover 2 is normally covered with a cover 2, and the cover 2 is fixed with bolts 3 or can be opened and closed with a hinge.

FIG. 10 is a plan view of one embodiment of an engine mounting device for a construction machine described in Japanese Utility Model Laid-Open No. 1-137354. In the engine mount device shown in FIG. 10, the mounting portion 15 is provided with a counterweight 20 that is moved by the moving means B, and the mounting portion 15 is provided with:
The engine holder A holding the engine 19 is provided so as to be movable, and the engine holder A is separably connected to the counterweight 20. Inspection of the engine 19,
At the time of maintenance, the engine 19 can be pulled out from a narrow place by moving the engine holder A by moving the counterweight 20, so that the inspection and maintenance of the engine 19 can be easily performed.

[0005]

In the construction machine (hydraulic shovel) according to the prior art shown in FIGS. 8 and 9, maintenance work such as inspection and maintenance of an engine and engine-attached equipment disposed inside a counterweight is performed. When doing
This must be done through an inspection window drilled in the counterweight. However, since the opening area of the inspection window hole is not sufficiently large, maintenance work is considerably difficult, and inspection and maintenance of the engine and the engine attachment devices cannot be performed sufficiently and reliably. FIG.
In an engine mount of the construction machine shown in FIG. 0, a counterweight moved by a moving means is provided on the mounting portion, and an engine holder holding the engine is movably provided on the mounting portion. For this reason, there is a problem of a space for disposing the moving means and the engine holding body in a narrow body, and the manufacturing cost is expensive. In addition, since the engine is moved, piping and wiring connected to the engine, the engine accessories (including the hydraulic pump), and the like must have a sufficient margin for movement, which is extremely inconvenient. According to the present invention, the counterweight mounted on the rear side of the upper revolving structure forms an outer peripheral surface from the upper surface to the vicinity of the bottom, and at least a part of the various devices arranged on the upper revolving structure is formed by the counterweight on the side surface of the upper revolving structure. And from the rear, and the engine is located on the side of the cab mounted on the upper
It is an object of the present invention to provide a construction machine which is arranged at a position not surrounded by a counterweight.

[0006]

SUMMARY OF THE INVENTION According to the present invention, in a construction machine having an upper revolving structure rotatably mounted on a lower traveling structure, a counterweight is mounted behind the upper revolving structure, and the counterweight is The upper revolving unit forms an outer peripheral surface from the top to the bottom from the back to the side surface of the upper revolving unit, and the counter weight is used for at least a part of various devices arranged on the upper revolving unit to be arranged on the side surface and the rear part of the upper revolving unit. And a plate-like guard member is removably disposed on the upper surface of the upper revolving unit with a line connecting the left and right ends of the counterweight straddling the front-rear direction. In the above case, the counterweight is integrally formed by casting, and has a substantially U-shape that is open in a forward direction of the upper revolving unit in plan view, and has a cross-sectional shape inside the upper revolving unit. It was made into a substantially U-shape that opened toward the user. The counterweight attached to the rear of the upper revolving unit surrounds at least a part of various devices disposed near the rear of the upper revolving unit from the rear, side, upper, and lower directions. The power source mounted on the body was arranged at a position that was not surrounded by the counterweight on the side of the cab, and the cooling device provided in the power source was oriented so as not to face the counterweight. Further, a control valve for controlling the operation of various hydraulic actuators mounted on the construction machine is arranged between the power source and the cab and below a work boom connected to the upper swing body.

In the construction machine of the present invention, since the rear part of the upper revolving structure is covered with the casting counterweight from the rear, side, lower and upper sides, for example, when working in a narrow place such as in a tunnel (particularly work involving turning) 2) It is possible to prevent damage to various internal devices of the machine due to contact with obstacles and the like. Further, since the upper part of the upper revolving structure is partially covered by the counterweight, the guard member forming the upper surface of the upper revolving structure can be constituted by a plate-shaped member, and the plate-shaped guard member is a line connecting the left and right front ends of the counterweight. Are arranged in the front-rear direction, maintenance of various devices disposed at a position surrounded by the counterweight can be easily performed by removing the guard member from above the body. Further, by disposing the power source (engine) on the side of the cab, since the counterweight does not cover the engine, heat radiation of the engine is maintained, and maintenance of the engine having many maintenance parts is not affected by the counterweight. In addition, since the cooling device (at least the radiator and the fan) is oriented so as not to face the counterweight (for example, facing the front of the fuselage), suction or blowing of the cooling air to the radiator is not affected by the counterweight, so that good cooling ventilation is performed. be able to. In addition, the control valve, which requires high maintenance, is located below the boom between the engine and the cab, so it can be maintained without being affected by the counterweight and can be isolated from the high temperature engine room. Can also be secured. It is also conceivable to arrange the control valve below the cab. However, this arrangement is not preferable considering the influence of heat and noise in the cab.

[0008]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a side view of the construction machine of the present invention. In the figure, reference numeral 4 denotes a lower traveling body of the construction machine, 5 denotes an upper revolving body that is pivotally mounted on the lower traveling body 4, 6 denotes a counterweight mounted behind the upper revolving body 5, and 7 denotes an upper revolving body 5. A cab 8 mounted on the left side of the upper part of the upper revolving structure 5 is a left side guard plate which is provided on the left side part of the upper revolving structure 5 so as to be openable and closable. FIG. 2 is a rear view as viewed from D in FIG. 1, but the left side guard plate 8 and the right side guard plate 11 are open. In the figure, reference numeral 13 denotes an engine as a power source mounted on the upper swing body 5, and reference numeral 14 denotes a control valve for controlling the operation of various hydraulic actuators mounted on the construction machine. FIG. 3 is a plan view as viewed from A in FIG. In the drawing, reference numeral 16 denotes a threaded hole for a hanging rod of the counterweight 6, and reference numerals 17 and 18 denote top guard plates, respectively.
Reference numeral 1 denotes a bolt that fastens and fixes the upper surface side guard plates 17 and 18, and reference numeral 22 denotes a right front guard plate that can rotate forward. FIG. 4 is a plan view of a main part cutaway of FIG. In the figure, 23 is a cooling device for cooling the engine 13 (including for an oil cooler), 24 is a radiator of the cooling device 23, 2
5 is a fan, 26 is a shroud, 27 is a hydraulic pump directly connected to the engine 13, 28 is a fuel tank, and 29 is a hydraulic oil tank. FIG. 5 is a plan view of an essential part showing another embodiment of the control valve 14 shown in FIG. In the figure, reference numeral 5 'denotes an upper swing body. FIG. 6 is a side view of the construction machine as viewed from G in FIG. FIG. 7 is a partial cross-sectional side view of the counterweight 6, and the cross-sectional portion is a view as viewed from line FF in FIG. 2 (the same applies to FIGS. 3 and 4). In the figure, reference numeral 30 denotes a bolt screw hole for fastening the counterweight 6 to a revolving frame (not shown) of the upper revolving unit 5, and 31 denotes a rear lamp mounting hole.

Next, the construction of the construction machine according to the present invention will be described with reference to FIGS. In the present invention, as shown in FIGS. 1 to 6, a counterweight 6 is attached to the rear of the upper revolving structure 5, and the counterweight 6 extends from the upper surface to the vicinity of the bottom from the rear to the side surface of the upper revolving structure 5. And at least a part of various devices arranged in the upper swing body 5, for example, the hydraulic pump 27, the fuel tank 28 (shown in FIG.
Cover the side of the revolving superstructure 5 and the rear, and connect the left and right ends of the counterweight 6 (line A shown in FIG. 3).
Upper side guard plates 17 and 18 as plate-like guard members are detachably disposed on the upper surface of the upper swing body 5 by tightening the bolts 21 over the front and rear directions. In the above case, the counterweight 6 is formed integrally by casting, and has a substantially U-shape that is opened forward in the plan view as shown in FIGS.
Further, the cross-sectional shape was substantially U-shaped and opened toward the inside of the upper swing body 5. The counterweight 6 surrounds at least a part (for example, a hydraulic pump 27, a fuel tank 28, and the like) of various devices disposed near the rear portion of the upper swing body 5 from the rear, side, upper, and lower directions, As shown in FIG. 4, the engine 13 mounted on the upper-part turning body 5 is located at a position not surrounded by the counterweight 6 on the side of the cab 7, and furthermore, the cooling device 2 for the engine 13 is provided.
3 was arranged so as not to face the counterweight 6. A control valve 14 for controlling the operation of various hydraulic actuators mounted on the construction machine is provided between the engine 13 and the cab 7 as shown in FIGS. Boom 1
0, or as shown in FIG. 4 and FIG.

Next, the operation of the construction machine according to the present invention will be described. In the construction machine of the present invention, since the rear part of the upper revolving structure 5 is covered with the casting counterweight (counterweight 6) from the rear, side, lower and upper sides, for example, when working in a narrow place such as in a tunnel (particularly when turning) In this case, it is possible to prevent damage to various internal devices of the machine due to contact with obstacles and the like. In addition, the upper revolving unit 5 is provided by the counterweight 6.
Of the upper revolving unit 5 can be formed of a plate-like member, and the upper side guard plates 17, 1 can be formed.
Reference numeral 8 denotes various devices disposed at positions surrounded by the counterweight 6, such as a hydraulic pump 27 and a hydraulic valve, since a line ea (shown in FIG. 3) connecting the left and right front ends of the counterweight 6 is disposed in the front-rear direction. 32 (shown in FIG. 4), maintenance of the hydraulic oil tank 29 and the like can be easily performed by removing the upper guard plate 18 or 17 from above the machine body.

Further, since the engine 13 is disposed on the side of the cab 7, since the counterweight 6 does not cover the engine 13, the heat radiation of the engine 13 is maintained, and the maintenance of the engine 13 having many maintenance parts is performed by the counter. Not affected by weight. Further, since the cooling device 23 (at least the radiator 24 and the fan 25) is oriented so as not to face the counterweight 6 (for example, toward the front of the fuselage), suction or blowing of cooling air into the radiator 24 is not affected by the counterweight 6. Good cooling ventilation can be performed. In addition, since the control valve 14 requiring high maintenance is arranged at a position below the work boom 10 between the engine 13 and the cab 7 or at a position below the cab 7 on the rear side, the control valve 14 is not affected by the counterweight 6. Maintenance can be performed, and it can be isolated from the high temperature engine room, so that sufficient heat radiation can be ensured.
It is also conceivable to arrange the control valve 14 below the cab 7. However, this arrangement is
It is not preferable considering the influence of heat and noise on the inside.

[0012]

According to the construction machine of the present invention, since the rear part of the upper revolving structure is covered with the casting counterweight from the rear, side, lower and upper sides, the work is performed in a narrow place such as in a tunnel, for example. It is possible to prevent the various internal devices of the machine from being damaged due to contact with an obstacle or the like during the accompanying operation). Further, since the upper part of the upper revolving structure is partially covered by the counterweight, the guard member forming the upper surface of the upper revolving structure can be constituted by a plate-shaped member, and the plate-shaped guard member is a line connecting the left and right front ends of the counterweight. Are arranged in the front-rear direction, maintenance of various devices disposed at a position surrounded by the counterweight can be easily performed by removing the guard member from above the body. Further, by disposing the power source (engine) on the side of the cab, since the counterweight does not cover the engine, heat radiation of the engine is maintained, and maintenance of the engine having many maintenance parts is not affected by the counterweight. In addition, since the cooling device (at least the radiator and the fan) is oriented so as not to face the counterweight (for example, facing the front of the fuselage), suction or blowing of the cooling air to the radiator is not affected by the counterweight, so that good cooling ventilation is performed. be able to. In addition, the control valve, which requires high maintenance, is located below the boom between the engine and the cab, so it can be maintained without being affected by the counterweight and can be isolated from the high temperature engine room. Can also be secured.

[Brief description of the drawings]

FIG. 1 is a side view of a construction machine according to the present invention.

FIG. 2 is a rear view as viewed from D in FIG. 1;

FIG. 3 is a plan view as viewed from A in FIG. 1;

FIG. 4 is a plan view of a main part cutaway of FIG. 1;

FIG. 5 is an essential part cutaway plan view showing another example arrangement of the control valve in FIG. 4;

FIG. 6 is a side view of the construction machine as viewed from G in FIG. 5;

FIG. 7 is a partial cross-sectional side view of a counterweight.

FIG. 8 is a side view showing an embodiment of a conventional hydraulic excavator.

FIG. 9 is a perspective view showing a counterweight according to an embodiment of the prior art and its vicinity.

FIG. 10 is a plan view of an embodiment of an engine mounting device for a conventional construction machine.

[Explanation of symbols]

 2 ', 5, 5' Upper revolving unit 3, 21 bolts 4 Lower traveling unit 6, 20 Counterweight 7 Cab 8 Left side guard plate 9, 13, 19 Engine 10 Work boom 11 Right side guard plate 14 Control valve 17, 18 Upper guard plate 23 Cooling device 24 Radiator 25 Fan 27 Hydraulic pump 28 Fuel tank 29 Hydraulic oil tank

Claims (6)

[Claims] 1. A construction machine having an upper revolving structure pivotally mounted on a lower traveling structure, wherein a counterweight is mounted behind the upper revolving structure, and the counterweight is laterally arranged from the rear of the upper revolving structure. And forming an outer peripheral surface from the upper surface to the vicinity of the bottom portion thereof, and the counterweight covers at least a part of various devices disposed on the upper revolving structure from a side surface and a rear portion of the upper revolving structure. A construction machine, wherein a plate-like guard member is detachably disposed on the upper surface of the upper revolving unit, straddling a line connecting the left and right ends of the upper revolving body. 2. The counterweight is integrally formed by casting, and the counterweight has a substantially U-shape that is open in a forward direction of the upper revolving unit in plan view. The construction machine according to claim 1. 3. The construction machine according to claim 1, wherein the counterweight has a substantially U-shaped cross section and is open toward the inside of the upper swing body. 4. A construction machine having an upper revolving structure pivotally mounted on a lower traveling structure, wherein a counterweight is mounted behind the upper revolving structure, and the counterweights are rearward, lateral, upward, and downward. Surrounding at least a part of various devices arranged in the vicinity of the rear part of the upper revolving unit from each direction, and the power source mounted on the upper revolving unit is the counter on a side of a cab mounted on the upper revolving unit. A construction machine characterized by being placed at a position not surrounded by weights. 5. The power source according to claim 4, wherein the power source is arranged such that a cooling device provided in the power source does not face the counterweight.
Construction machinery as described. 6. A control valve for controlling operation of various hydraulic actuators mounted on the construction machine is disposed between the power source and the cab and below a work boom connected to the upper swing body. The construction machine according to claim 4, wherein the construction machine is provided.