JPH1181380A - Construction equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide construction equipment to prevent leakage of noise, generated due to position displacement of an external facing cover, to an external part and lowering of appearance quality without needing a complicated work. SOLUTION: An inclination association surface 80a gradually inclining upward along the internal or external direction of engine hood 83 is formed at an association part between a counterweight 80 and an edge part 83c of an engine hood 83. The tip edge of the engine hood 83 in a closed state is positioned facing the association surface 80a between an upper edge 80b and a lower edge 80c of the inclination association surface 80a.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a base member, which is arranged to be openable and closable around a horizontal axis with respect to an exterior part of a base through a base end portion.
Also, the present invention relates to an improvement of a construction machine having an exterior cover having a tip portion extending downward in a closed state.

[0002]

2. Description of the Related Art A construction machine such as a hydraulic power shovel generally includes an upper revolving unit above a lower traveling unit provided with traveling means such as a crawler. The upper revolving unit supports the working machine so as to be able to move up and down via supporting means, and has various functional parts such as an engine and a fuel tank therein, and is provided with a lower traveling unit via a revolving mechanism such as a revolving circle. It is possible to make a turn in a range of 360 ° around a turning axis along the vertical axis.

Usually, in this type of construction machine, a situation in which foreign matter such as earth and sand easily enters the inside of the upper revolving structure during work is prevented by covering the periphery of the upper revolving structure with an exterior panel. An inspection cover is provided on the panel so as to be openable and closable, and the exterior panel is opened to enable inspection work of various functional parts provided inside the upper revolving unit from the outside.

For example, in a construction machine disclosed in Japanese Utility Model Laid-Open Publication No. 64-19659, an inspection cover called an engine hood is disposed at a position located above a counterweight at a rear end of an upper revolving structure. By opening the inspection cover upward around the horizontal axis, inspection of each part of the engine becomes possible.

In the construction machine disclosed in Japanese Utility Model Laid-Open Publication No. 64-19659, the lower end edge of the inspection cover in the closed state is formed horizontally, and the counter serving as a junction with the lower edge of the inspection cover is provided. The upper surface of the weight is configured to be horizontal, and when the inspection cover is closed, the lower edge of the inspection cover and the upper surface of the counterweight are arranged close to each other.

[0006]

However, the construction environment of this type of construction machine is more severe than that of a general vehicle, and the frequency of vibration or impact applied to the inspection cover described above, or Since the frequency of interference or collision with other construction machines becomes extremely high, the opening / closing axis of the inspection cover may be easily shifted from the horizontal axis.

In such a case, in the conventional construction machine, as shown in FIG. 5, the inspection cover in the closed state due to the shift of the opening / closing axis B of the inspection cover A with respect to the horizontal axis C, as shown in FIG. An uneven gap is formed between the lower end edge D of the cover A and the upper surface F of the horizontally extending counterweight E, and the engine noise leaks directly to the outside through the uneven gap. As a result, the appearance quality is also deteriorated.

Moreover, in construction machines, the inspection cover A itself is usually large, and a long meeting portion is formed between the inspection cover A and the upper surface F of the counterweight E. Is farther away from the opening / closing axis B than the side edges and the upper edge of the counterweight E, and the slight displacement of the counterweight E near the opening / closing axis B Since it is greatly enlarged at the meeting portion with the upper surface F, not only the above-mentioned situation is easily caused, but also a large amount of work is required for adjusting the gap at the meeting portion.

The present invention has been made in view of the above circumstances, and provides a construction machine capable of preventing noise from leaking to the outside and deterioration in appearance quality due to displacement of an outer cover without requiring complicated work. Is the task to be solved.

[0010]

According to the first aspect of the present invention, the base member is disposed so as to be openable and closable around the horizontal axis with respect to the exterior component of the base via the base end portion, and the front end is provided in the closed state. In a construction machine having an exterior cover having a portion extending downward, at least a portion of the exterior component that meets the tip of the exterior cover has a slope that is gradually inclined in the vertical direction along the inside and outside directions of the exterior cover. In addition, the front edge of the exterior cover in the closed state is opposed to the inclined surface between the upper edge and the lower edge of the inclined surface.

According to the first aspect of the present invention, since the leading edge and the inclined surface of the outer cover in the closed state overlap with each other in the height direction, the opening / closing axis of the outer cover is formed. Even if the angle is shifted from the horizontal axis, it is difficult to visually recognize the uneven gap between the tip of the exterior cover and the exterior component, and the gap adjustment work between the exterior cover and the exterior component is difficult. Without lowering the appearance quality.

Further, according to the first aspect of the present invention,
As long as the noise generated inside the base does not leak to the outside as long as it is not refracted along the inclined surface, it is advantageous in terms of sound insulation as compared with the conventional one.

[0013] In the invention according to claim 2, the inclined surface is inclined gradually upward toward the inside of the exterior cover.

According to the second aspect of the invention, foreign matters such as rainwater and earth and sand adhered to the inclined surface are guided to the outside of the base along the inclination direction. It is possible to effectively prevent foreign matter such as rainwater and earth and sand from entering.

Further, according to the third aspect of the present invention, a seal member is provided on one of the tip portion of the exterior cover and the inclined surface of the exterior component, and the tip of the exterior cover is provided via the seal member. The part and the inclined surface of the exterior component are pressed against each other.

According to the third aspect of the present invention, since the gap between the exterior cover and the exterior component is sealed by the sealing member, the inclined surface is gradually inclined upward toward the inside of the exterior cover. As a matter of course, even when the inclined surface is gradually inclined upward toward the outside of the exterior cover, the above-described effects such as the sound insulation and the prevention of foreign matter intrusion can be expected.

[0017]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the drawings showing one embodiment. 2 to 4 conceptually show one embodiment of a construction machine according to the present invention. The construction machine exemplified here is applied when performing civil works such as excavation, earthwork, and earth removal at a construction site, and includes a lower traveling body 10 and an upper revolving superstructure (base) 30.

The lower traveling body 10 includes a track frame 11
A pair of left and right crawlers 12 are provided on both sides of the track frame 11, and an earthworking machine 20 is provided at the front end of the track frame 11. It is possible to perform traveling such as forward, backward, turning and turning via each crawler 12 by driving each traveling hydraulic motor (not shown). It is.

Each of the pair of crawlers 12 has an endless annular shape. The crawlers 12 are parallel to each other in plan view, and the distance W between the outer edges thereof is smaller than the length L in the front-rear direction. It is wound between the crawler sprocket 13 and the crawler idler 14 arranged on both sides.

The earthworking machine 20 is suitable for performing operations such as earthwork and earth removal on the ground F on which the undercarriage 10 is installed. The earthworking machine 20 has a blade 21 fixed between its tip portions. A pair of blade arms 22 pivotally mounted on the front end of the track frame 11 via respective base ends in a horizontal manner so as to be able to move up and down, and a connection frame for connecting between the distal ends of the pair of blade arms 22 23 and a blade lift cylinder actuator 24 interposed between the front ends of the track frames 11. The blade lift cylinder actuator 24 drives the blade 21 in a horizontally extended state. It can be moved up and down around the horizontal axis.

On the other hand, the upper turning body 30 of the construction machine has a base plate 3 extending in the horizontal direction at a base portion thereof.
1 and is disposed above the lower traveling body 10 with the turning circle 40 interposed between the base plate 31 and the track frame 11 of the lower traveling body 10. 360 ° around the turning axis α along the vertical axis with respect to the undercarriage 10.
It is possible to turn within the range. Although not explicitly shown in the drawing, the base plate 31 of the upper rotating body 30 is not shown.
Are configured such that their outer shapes are all within a circumference (hereinafter simply referred to as a maximum turning circle) whose radius is the distance W / 2 from the turning axis α to the outer edge of the one crawler 12. I have.

As is apparent from the drawing, the upper revolving unit 30 is provided with a support means 50 at a position slightly deviated to the right from the median surface of the base plate 31. The engine 60 is mounted on a portion of the upper surface of the vehicle which is located behind the support means 50.

The support means 50 is erected along the median surface of the base plate 31 so as to be parallel to each other, and a pair of left and right vertical rib members 51, 52 whose respective distal ends are located within the aforementioned maximum turning circle. Provided with these vertical rib members 5
The boss members 53 and the actuator boss members 54 and 54 are arranged at opposing portions of the boss members 53 and 54, respectively.
Through which the offset-type excavator 70 is supported so as to be able to move up and down.

The offset type excavator 70 is suitable for performing a backhoe operation, that is, an operation for excavating a place lower than the ground F on which the lower traveling body 10 is installed.
When the base end is arranged horizontally, the front end has a substantially L-shape bent downward, and the support means 50 is provided through the base end.
A work boom 71 which is pivotally mounted between the boom boss members 53 so as to be able to move up and down, a work arm 72 which is pivotally mounted on the distal end of the work boom 71 so as to swing about a horizontal axis. An excavating bucket 73 is provided at the tip of the arm 72 so as to swing about a horizontal axis.
By driving the boom cylinder actuator 74 interposed between the bent portion of the work boom 71 and the actuator boss members 54 of the support means 50, the work boom 71 is moved horizontally relative to the upper rotating body 30. The work arm 72 can be moved around the work boom 71 by driving an arm cylinder actuator 75 interposed between the distal end of the work boom 71 and the base end of the work arm 72. Can be swung about an axis parallel to the raised / lowered axis, and further driven by a bucket cylinder actuator 76 interposed between the base end of the working arm 72 and the excavating bucket 73.
The excavating bucket 73 can be swung with respect to the work arm 72 around an axis parallel to the above-described undulating axis.

In the offset type excavator 70, the above-described work boom 71 is divided into a first boom portion 71a, a second boom portion 71b, and a third boom portion 71c sequentially from the base end thereof. 1st boom part 71a
By supporting a link rod (not shown) parallel to the second boom part 71b between the first boom part 71b and the third boom part 71c, the first and second boom parts 71b and the link rod (not shown) support the first rod. A parallel link is formed between the boom part 71a and the third boom part 71c, and an offset cylinder actuator (not shown) is interposed between the base end of the second boom part 71b and the third boom part 71c. By driving the offset cylinder actuator (not shown), the work arm 72 and beyond can be offset left and right with respect to the first boom portion 71a without changing the direction of the excavating bucket 73. ,
For example, as clearly shown in FIG. 3, the boom cylinder actuator 74, the arm cylinder actuator 75, the bucket cylinder actuator 76, and the offset cylinder actuator (not shown) are each appropriately driven to expand and contract, so that the work boom 71 and the work arm 72 are moved.
And each of the excavating buckets 73 can be arranged within the maximum turning circle described above.

The engine 60 includes a cooling fan 61 and a radiator 62 at one end of a crankshaft (not shown). The axis of the crankshaft (not shown) is positioned at the center of the base plate 31. The cooling fan 61 and the radiator 62 are mounted on the base plate 31 in a state where the cooling fan 61 and the radiator 62 are arranged on the right side of the base plate 31.

It should be noted that reference numerals 63, 64, 65, 66 in FIG.
Are a battery, a fuel tank, a hydraulic oil tank, and a radiator reserve tank disposed on the upper surface of the base plate 31 at a position located on the right side of the support means 50. The extension of the vertical rib members 51, 52 described in this order. The base plates 31 are arranged so as to be close to each other from the front side to the rear side of the base plate 31 along the existing direction.

As is clear from FIGS. 3 and 4, in this construction machine, the counterweight (exterior part) 80 and the outer panel (exterior part) 81 are located around the base plate 31 within the above-mentioned maximum turning circle. The counter weight 80 and the exterior panel 81
Thereby, the above-mentioned components such as the battery 63, the fuel tank 64, the hydraulic oil tank 65, the radiator reserve tank 66, the engine 60 and the radiator 62 are covered.

The counterweight 80 is formed of a metal such as cast iron, and functions as a weight for balancing with the offset type excavator 70. The counterweight 80 has a substantially arc shape in plan view and has a base plate 31. The engine is mounted on a portion of the upper surface located further rearward than the engine 60, and covers a lower rear region of the engine 60.

As clearly shown in FIG. 1, the counterweight 80 has an inclined association surface (inclined surface) 80a formed over the entire area of the upper surface thereof located on the outer peripheral side.
The inclined meeting surface 80a is inclined so as to gradually increase inward from the outer peripheral surface of the counterweight 80, and has a sufficient height between a portion serving as the upper edge 80b and a portion serving as the lower edge 80c. H.

As shown in FIGS. 2 to 4, the exterior panel 81 is formed by appropriately combining a plurality of resin parts. An engine inspection opening 82 is provided at a position above the counterweight 80 described above. In the secured state, the arrangement area of the bearing means 50 and this bearing means 50
Substantially the entire area around the part excluding the movement area of the offset type excavator 70 supported with the counterweight 80 is surrounded by the counterweight 80 described above.

The engine inspection port 82 is largely open from a region extending from the rear region of the radiator 62 to a region rearward of the left end of the engine 60, and further to a region extending from the rear region of the radiator 62 and the rear end of the engine 60. The radiator 62 and the engine 60 can be easily inspected, and are normally closed by a resin engine hood (exterior cover) 83.

In the closed state, the engine hood 83 is bent downward from the horizontal portion 83a to cover the radiator 62 and the rear region above the rear end of the engine 60, and to cover the radiator 62 and the rear region of the engine 60 from the horizontal portion 83a. The extended outer peripheral portion 83b and the outer peripheral portion 83
b, the edge portion (tip of the exterior cover) 83c extending in such a manner as to be gradually inclined inward downward from b. The counterweight described above is a plan view of the outer peripheral portion 83b and the edge portion 83c. 80, a hinge 84 is interposed between the horizontal portion 83a and the exterior panel 81 at the base end of the horizontal portion 83a.
The upper revolving unit 30 is provided so as to be openable and closable about a horizontal axis along the left-right direction of the upper revolving unit 30 through the fourth through-hole 4.

As is clear from FIG. 1, the engine hood 83 is provided when the engine inspection port 82 is closed.
The tip end surface of the above-mentioned edge portion 83c is positioned at the upper edge 80 with respect to the inclined meeting surface 80a formed on the counterweight 80.
b and the lower edge 80c are formed so as to be disposed close to the inclined meeting surface 80a at a height position intermediate between the lower edge 80c and the lower edge 80c.
b and above the lower edge 80c.

Further, the engine hood 83 is provided with a seal member 85 formed of a material having high elasticity such as rubber around the entire periphery thereof, and when the engine inspection port 82 is closed, The space between the exterior panel 81 and the inclined meeting surface 80a of the counterweight 80 is sealed through the seal member 85.

Although not explicitly shown in the figure, a lock means operable from outside the engine hood 83 is interposed between the engine hood 83 and the counterweight 80, and By the action, they are locked to each other in the closed state to restrict the inadvertent opening of the engine hood 83, while allowing the engine hood 83 to be easily opened when released. Although not explicitly shown in the figure, the engine hood 8
A means for holding the engine hood 83 when the engine hood 83 is opened is interposed between the third panel 3 and the exterior panel 81.

Further, reference numeral 90 in FIG. 3 and FIG.
This is a cabin disposed at a position on the upper revolving unit 30 located on the left side of the support means 50.

In the construction machine configured as described above, the offset digging machine 70 and the earth working machine 20 are driven with the engine hood 83 closed, thereby excavating, earth working, and discharging the earth at the construction site. Such civil works will be performed.

In this state, since the periphery of the upper swing body 30 is covered with the counterweight 80, the exterior panel 81, and the engine hood 83, foreign matter such as earth and sand is removed from the upper swing body 30 during the above-mentioned civil engineering work. It is possible to prevent as much as possible the intrusion into the interior or the intrusion of foreign matter such as rainwater or dust into the upper revolving unit 30 while the vehicle is stopped. It is possible to prevent the noise from being generated, and to effectively prevent the noise generated from the engine 60 from leaking directly to the outside during the work.

Particularly, around the engine hood 83, the space between the engine hood 83, the exterior panel 81 and the counterweight 80 is sealed by the sealing members 85, respectively, so that foreign matter enters and engine noise leaks outside. Can be reliably prevented.

On the other hand, in the construction machine, the engine 60
When the inspection work is performed, the engine hood 83 may be opened with respect to the exterior panel 81 after releasing the locking means (not shown), and the engine hood 83 may be held in that state.

In this state, the engine inspection opening 82
The rear area of the engine 60 and the upper area of the rear end of the engine 60 are greatly opened through, so that it is possible to easily perform inspection work on the engine 60 without causing any trouble. Become.

As described above, in a construction machine mainly for civil engineering work, the use environment is harsh as compared with a general vehicle, and the frequency of vibration or impact applied to the engine hood 83 or other factors. The frequency of interference and collision of the construction machines of
As shown in (b), there is a possibility that the opening / closing axis X of the engine hood 83 is easily shifted from the horizontal axis C.

However, according to the construction machine described above, the tip surface of the edge portion 83c of the engine hood 83 is
The counterweight 80 is arranged close to the inclined meeting surface 80a at a height position between the upper edge 80b and the lower edge 80c of the inclined meeting surface 80a formed on the counterweight 80. The upper edge 80b of the inclined meeting surface 80a in the counterweight 80 is located above the tip end surface of the edge portion 83c, and the edge portion 83c and the inclined meeting surface 80a overlap each other in the height direction. 2 (a) and 2 (b), even when the opening / closing axis X of the engine hood 83 is displaced from the horizontal axis C, it can be visually recognized as an uneven gap. It will be difficult.

Therefore, in the above construction machine, even if the opening / closing axis X of the engine hood 83 is shifted from the horizontal axis C, the gap between the engine hood 83 and the counterweight 80 is adjusted. The appearance quality can be prevented from deteriorating without any modification work.

In addition, according to the construction machine, since the opening / closing axis X of the engine hood 83 is shifted from the horizontal axis C, the sealing member 8 provided on the engine hood 83
Even in a state in which 5 is separated from the inclined meeting surface 80a of the counterweight 80, since the inclined meeting surface 80a is inclined in such a manner as to gradually increase toward the inside of the upper rotating body 30, Foreign matters such as earth and sand and rainwater attached to the inclined meeting surface 80a are guided to the outside of the upper revolving unit 30 along the inclination direction, and the situation where these foreign objects enter the inside of the upper revolving unit 30 is invited. There is no danger that the noise generated from the engine 60 will not leak to the outside of the upper revolving unit 30 during the operation unless it is bent downward along the inclination direction of the inclined meeting surface 80a. There is no remarkable decrease in performance.

In the above-described embodiment, a construction machine which is applied between an engine hood for inspecting an engine and a counterweight disposed below the engine hood is exemplified. However, the present invention is not limited to these, and it goes without saying that the space between the exterior cover other than the engine hood and the exterior component other than the counterweight can be applied. In this case, the outer cover and the outer parts are not necessarily provided on the upper revolving unit, that is, are not limited to those which are rotatably provided and which support the working machine, but are provided on other bases. However, a similar effect can be expected. In addition, in the above-described embodiment when the exterior cover and the exterior component of the base supporting the working machine are applied, the working machine is an offset-type excavating working machine. There is no.

Further, in the above-described embodiment, the inclined surface is formed only at the meeting part with the front end of the exterior cover in the exterior part, but the meeting part with the base end and both side parts of the exterior cover is formed. Also, if the same inclined surface is formed, the appearance quality and the sound insulation effect will be more remarkably improved. In this case, at the meeting portion with the base end portion of the exterior cover, similarly to the meeting portion with the distal end portion of the exterior cover, an inclined surface that gradually inclines in the vertical direction along the inside and outside directions of the exterior cover may be formed. In addition, as for the meeting portion with the both sides of the exterior cover, an inclined surface may be formed which gradually inclines toward and away from the center of the exterior cover along the inside and outside directions of the exterior cover.

Further, in the above-described embodiment, the inclined surface is provided so as to be gradually inclined upward toward the inside of the exterior cover. However, the inclined surface is gradually inclined upward toward the outside of the exterior cover. It may be inclined. In addition, the inclined surface extending flatly along the inner and outer directions of the outer cover is illustrated, but the inclined surface may be formed by a curved surface that curves upward or downward along the inner and outer directions of the outer cover. It is.

[Brief description of the drawings]

FIG. 1 is a sectional view schematically showing a main part of an embodiment of a construction machine according to the present invention.

FIG. 2 is an external rear view of the construction machine shown in FIG. 1, showing a state in which a work implement of an upper-part turning body is removed.

FIG. 3 is an external side view showing the entire construction machine shown in FIG. 1;

FIG. 4 is an external plan view showing the entire construction machine shown in FIG. 1, showing a state in which a work implement of an upper-part turning body is removed.

FIG. 5 is an external rear view of a conventional construction machine.

[Explanation of symbols]

 Reference Signs List 30 upper revolving body 80 counterweight 80a inclined meeting surface 80b upper edge 80c lower edge 81 exterior panel 83 engine hood 83c engine hood edge portion 85 seal member X opening and closing axis of engine hood

Claims (3)

[Claims] 1. A base member (30) is disposed so as to be openable and closable around a horizontal axis with respect to exterior parts (80, 81) of a base (30) via a base end part, and a front end part (83c) faces downward when closed. A construction machine provided with an exterior cover (83) extending toward the outer cover (83). A slope (80a) that is gradually inclined in the vertical direction along the direction is formed, and the leading edge of the exterior cover (83) in the closed state is formed by the slope (80a).
a) A construction machine characterized in that it faces the inclined surface (80a) between an upper edge (80b) and a lower edge (80c). 2. The construction machine according to claim 1, wherein the inclined surface (80a) is gradually inclined upward toward the inside of the exterior cover (83). 3. A tip (83) of the exterior cover (83).
c) and a sealing member (85) is provided on one of the inclined surfaces (80a) of the exterior component (80), and the distal end portions (83c) of these exterior covers (83) are provided via the sealing member (85). The construction machine according to claim 1 or 2, wherein the inclined surface (80a) of the exterior component (80) and the inclined surface (80a) are pressed against each other.