JP2002038524A - Hydraulic shovel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a hydraulic shovel which is improved with respect to an installation site of a capacitor so as to solve problems such as decrease in cooling ability of a radiator, an oil cooler, etc., upsizing of an upper revolving structure, degradation in visibility from a driver seat, decrease in workability, and degradation in its appearance, the problems being caused by the installation site of the capacitor of an air conditioner mounted in the hydraulic shovel. SOLUTION: The capacitor (20) is set in a space (S) enclosed by a pair of main frame members (16 and 17) which are mounted on the upper revolting structure and have a working apparatus installed thereon, and connecting frame member (18) stretched across the main frame members to connect the same together.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hydraulic shovel, and more particularly, to a hydraulic shovel in which a condenser of an air conditioner to be installed is improved.

[0002]

2. Description of the Related Art A hydraulic excavator includes a lower traveling body, an upper revolving body mounted on the lower traveling body so as to be pivotable in a horizontal direction, and a working device mounted on the upper revolving body so as to be vertically swingable. Have. The upper slewing body is provided with a cab, which is a cab, and the cab is provided with an air conditioner.

[0003] A known air conditioner includes a condenser which is a heat exchanger for a refrigerant, and a typical installation place of the condenser in a hydraulic shovel is as follows. (1) Installed in series with radiator and oil cooler: Fig. 6
As shown in (a), a hydraulic excavator is installed in series with a radiator of engine cooling water and an oil cooler of hydraulic oil provided in an upper swing body of the hydraulic excavator. (2) Parallel installation with radiator and oil cooler: Fig. 6
As shown in (b), it is arranged in parallel with the radiator and the oil cooler. The condenser is provided with a dedicated fan for flowing cooling air. (3) Installation outside upper revolving superstructure: As shown in FIG. 6C, it is installed outside the upper revolving superstructure such as the upper surface of the upper revolving superstructure. The condenser is provided with a dedicated fan for flowing cooling air.

[0004]

The conventional method of installing a condenser in a hydraulic excavator of the type described above has the following problems to be solved.

(1) In case of installing in series with a radiator and an oil cooler: In the case of installing in series, the limited space of the upper revolving unit can be effectively used, and a fan for flowing cooling air is required. Although it is advantageous from the viewpoint of cost, the radiator,
The cooling capacity of the oil cooler etc. will be reduced.

(2) Installation in parallel with a radiator and an oil cooler: When installing in parallel, it is possible to prevent a decrease in the cooling capacity of the radiator, the oil cooler, etc., but to provide a space for installing a condenser, The upper revolving superstructure becomes large, and workability in narrow terrain and rear visibility decrease.

(3) Installation outside the upper revolving unit: When installed outside the upper revolving unit, it is possible to prevent the cooling capacity of the radiator, the oil cooler and the like from being lowered and to make the upper revolving unit larger, but the external appearance of the hydraulic shovel Will worsen, and the commercial value will decrease. Further, the visibility from the cab provided with the driver's seat also deteriorates. Further, the workability of the excavator is also deteriorated due to the deterioration of the visibility.

The present invention has been made in view of the above-mentioned circumstances, and its technical problem is that the cooling capacity of a radiator, an oil cooler, and the like, which is caused by the installation location of a condenser of an air conditioner to be installed, and that the upper turn Larger body,
An object of the present invention is to provide a hydraulic shovel in which a condenser installation location is improved so that problems such as deterioration of visibility from a driver's seat, deterioration of workability, and deterioration of appearance can be solved.

[0009]

According to a first aspect of the present invention, there is provided a pair of substantially parallel plate-shaped main frame members provided on an upper swing body of a hydraulic excavator and to which a working device is attached. A condenser of the air conditioner and a fan means for flowing cooling air to the condenser are provided in a space surrounded by the plate-shaped connecting frame member inserted and connected between the pair of main frame members. It is a hydraulic shovel characterized by the above.

[0010] By installing the condenser at the main frame member and the connection frame member to which the working device of the upper rotating body is attached, the radiator and the oil cooler can be performed without changing the size and appearance of the upper rotating body. It is possible to eliminate problems such as deterioration of cooling capacity and deterioration of visibility.

According to a second aspect of the present invention, in the hydraulic shovel according to the first aspect, the connecting frame member and at least one of the main frame members have openings through which cooling air flowing through the condenser can pass. It is.

By flowing cooling air through these openings, the condenser can be more appropriately cooled.

According to a third aspect of the present invention, in the hydraulic shovel according to the first or second aspect, the fan means includes an electric motor for rotating the fan.

Further, since the electric motor is surrounded by the main frame member and the connection frame member, it is possible to prevent rainwater or the like from adhering to the electric motor and to prevent interference with foreign substances. Therefore, an electric motor that can be easily installed with only electric wiring can be effectively used.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of a hydraulic shovel constructed according to the present invention will be described below in more detail with reference to the accompanying drawings.

Referring to FIG.
The hydraulic excavator shown by the symbol
An upper revolving unit 6 pivotally supported on a revolving axis 5 extending substantially vertically upward (extending in the vertical direction in FIG. 1), and a work mounted on the upper revolving unit 6 so as to be vertically swingable. Device 8. The upper revolving unit 6 includes a revolving unit frame 10 serving as a skeleton thereof. The revolving unit frame 10 has a working device 8 mounted thereon,
Cab 12 as a cab, engine room 1 including engine
4 and other devices and equipment.

Referring to FIGS. 1 to 2 and FIGS. 2 to 4, the revolving unit frame 10 includes a pair of plate-like main frame members 16 and 17 to which the working device 8 is attached, and the main plates 16 and 17. 17, a connection plate 18 which is a plate-like connection frame member and inserted between the plates 17, 18, and a condenser 20 for an air conditioner provided in the cab 12 is provided in a space S surrounded by these plates 16, 17, 18. Further, a fan means 22 for flowing cooling air to the condenser 20 is provided.

The revolving frame 10 will be further described. The revolving frame 10 is formed integrally by welding various steel members to each other. Main plates 16 and 17
Is formed by a thick plate material into substantially the same substantially triangular shape, with the bottom side longer than the other two sides, one of the hypotenuses being gently inclined, and the other hypotenuse being steeply inclined. The pair of main plates 16 and 17 are substantially parallel to each other with the pivot axis 5 interposed therebetween, and the bottom sides thereof are the base plates 2 of the revolving frame 10.
4 and are joined and erected. The connection plate 18 is formed by bending a rectangular plate member into a mountain shape,
Both ends in the direction of the folding curve are brought into contact with the main plates 16 and 17, respectively, and are positioned and joined along the steeply inclined sides of the main plates 16 and 17. Bearing holes 26a, 26b for mounting the above-described working device 8 are respectively formed in the main plate 16 and 17 in the gently sloping side (triangular upper projection) and the sloping bottom in the main plate 16 and 17, respectively. , 2
6c and 26d are formed. The working device 8 is attached to these bearing holes 26a, 26b, 26c, 26d via pin members (not shown).

Further, a rectangular opening 30 is formed on the surface of the connecting plate 18 on the side in contact with the base plate 24, and a rectangular opening 28 is formed on one main plate 16 below the bearing hole 26a. Opening 28 and opening 3
0 is determined by at least the fan means 22 (the fan means 22 will be described later in detail).
It is formed in a size that allows the cooling air to flow through it.

The condenser 20 is a well-known condenser and is formed in a substantially rectangular parallelepiped shape. In the space S described above, a pair of brackets 32 are mounted on the base plate 24 of the revolving frame 10.
The connection plate 18 is positioned and attached to the opening 30 of the connection plate 18 by means (not shown) such as bolts through the holes 32a and 32b. Refrigerant piping (not shown) formed of a known piping material is connected to the inlet and outlet ports of the condenser 20.

The fan means 22 includes a fan 22a and an electric motor 22b for rotating the fan 22a. The fan means 22 is positioned on the opposite side of the opening 30 with the condenser 20 interposed therebetween, and is generated by the fan 22a when the electric motor 22b is driven by means such as bolts (not shown) on the base plate 24 via the bracket 34. The cooling air is sucked from the opening 30 and passes through the condenser 20 so as to be mounted as a so-called suction fan.

Thus, the cooling air generated by the fan means 22 is sucked through the opening 30 of the connecting plate 18 as shown by the arrow X in FIG. It is discharged from a gap in the direction of the turning axis 5, which is the turning center, an opening or the like.

Referring to FIG. 5, another arrangement of the condenser 20 and the fan means 22 in the space S will be described. In this embodiment, the condenser 20 and the fan means 22 in the arrangement shown in FIGS. Are installed toward the opening 28 of the main plate 16.
The cooling air generated by the fan means 22 is
As shown by the arrow Y, it is sucked from the opening 28 of the main plate 16, passes through the condenser 20, and is discharged from the opening 30 of the connecting plate 18, the gap in the direction of the turning axis 5 which is the turning center, the opening and the like. .

The operation of the hydraulic shovel provided with the condenser as described above will be described.

(1) Field of view, workability, appearance: condenser 2
0 is a main plate 1 which is a main frame member of the revolving frame 10 together with a fan means 22 for flowing cooling air.
6, 17 and connecting plate 18 as connecting frame member
Since it is installed in the space S surrounded by, there is no need to change the size and shape of the upper swing body 6 in order to install the condenser 20 and the fan means 22. Therefore, it is possible to solve the conventional problems such as an increase in the size of the upper revolving unit, deterioration in the visibility from the driver's seat, reduction in workability, and deterioration in appearance. In a typical excavator,
This space S is a turning center portion of the upper revolving unit as shown in the above-described embodiment, and the turning center portion is a rotary joint such as a pipe connecting the upper revolving unit and the lower traveling unit (see FIGS. Since the dead space is substantially provided with the reference numeral 36 in FIG. 4), the capacitor can be installed by effectively utilizing the dead space.

(2) Cooling capacity: The condenser 20
Is installed in a place separated from the radiator, the oil cooler, etc., so that the conventional problem that the cooling capacity of the radiator, the oil cooler, etc. is reduced is also eliminated.

(3) Opening: Further, by providing the openings 28 and 30 in the main plate 16 and the connecting plate 18, the cooling air is more appropriately passed through the condenser 20.

(4) Cost: The openings 28 and 30 provided in the main plate 16 and the connecting plate 18 are
If they are formed so as to also serve as pipe openings provided in these members or holes for reducing weight, it is possible to suppress an increase in cost for installing the capacitor 20.

(5) Fan means: The pair of main plates 16 and 17 and the connecting plate 18 serve as roofs and walls of the fan means 22, respectively, so that rainwater flows through the fan 22a.
Of the fan means 22 due to rust, corrosion, etc., and a decrease in reliability can be prevented. Further, since the main plates 16, 17 and the connection plate 18 are formed of relatively thick plate members, the fan means 22 and the capacitor 20 can be sufficiently and reliably protected from interference with foreign substances and damage due to contact.

As described above, the present invention has been described in detail based on the embodiments. However, the present invention is not limited to the above-described embodiments. It can be changed or modified.

(1) Capacitor: In the embodiment of the present invention, the capacitor 20 is disposed toward the opening 30 formed in the connecting plate 18 or the opening 28 formed in the main plate 16. The direction can be appropriately set, for example, upward, depending on the type, size, structure, etc. of the excavator.

(2) Openings: In the embodiment of the present invention, the openings 28 and 30 provided in the main plate 16 and the connecting plate 18 are each formed in a rectangular shape. Any shape can be used as long as it can pass through, for example, a round shape, a triangular shape, or the like. Although the opening is formed in one main plate 16 of the pair of main plates 16 and 17, the opening may be formed in the main plate 17.
17 may be formed.

(3) Fan means: In the embodiment of the present invention, the fan means 22 is provided with the electric motor 22b, but a rotary drive means such as a hydraulic motor may be used instead of the electric motor 22b.

(4) Connection frame member: In the embodiment of the present invention, the connection plate 1 of the revolving frame 10
8 is formed by bending a rectangular plate member into a mountain shape, but the shape of the connection plate is appropriately determined according to the size and shape of the capacitor 20 and the fan means 22 so as to protect them. Can be changed to Alternatively, a cover member or the like may be added.

[0035]

According to the hydraulic excavator constructed in accordance with the present invention, the cooling capacity of the radiator, the oil cooler, etc., is reduced due to the installation location of the condenser of the equipped air conditioner, and the size of the upper swing body is increased. Provided is a hydraulic shovel in which a condenser installation place is improved so that problems such as deterioration of visibility from a driver's seat, deterioration of workability, and deterioration of appearance can be solved.

[Brief description of the drawings]

FIG. 1 is a side view of a hydraulic excavator with a condenser installed according to the present invention.

FIG. 2 is a perspective view of a swing frame of the hydraulic shovel shown in FIG. 1;

FIG. 3 is a partially enlarged plan view of the revolving unit frame seen in the direction of arrow A in FIG.

FIG. 4 is a cross-sectional view as seen in the direction of arrows BB in FIG. 3;

FIG. 5 is a partially enlarged plan view of the revolving unit frame showing another installation form of the condenser as viewed in the direction of arrow A in FIG. 2;

FIG. 6 is an explanatory view of an installation form of a conventional capacitor.
(A) is a partial view of an upper revolving structure of a hydraulic shovel showing a form in which a condenser is installed in series with a radiator and an oil cooler, and (b) is an upper revolving body showing a form in which a condenser is installed in parallel with a radiator and an oil cooler. Partial view of the
(C) is a view of the upper revolving unit as viewed from the side, showing a form in which a condenser is installed outside the upper revolving unit.

[Explanation of symbols]

 2: Hydraulic excavator 6: Upper revolving body 8: Working device 10: Revolving body frame 16: Main plate (main frame member) 17: Main plate (main frame member) 18: Connection plate (connection frame member) 20: Capacitor 22: Fan means 22a: fan 22b: electric motor 28: opening 30: opening S: space

Claims (3)

[Claims] 1. A pair of substantially parallel plate-shaped main frame members provided on an upper revolving structure of a hydraulic shovel and to which a working device is attached, and are inserted and connected between the pair of main frame members. A hydraulic excavator, wherein a condenser of an air conditioner and a fan means for flowing cooling air to the condenser are installed in a space surrounded by the plate-shaped connecting frame member. 2. The hydraulic shovel according to claim 1, wherein the connecting frame member and at least one main frame member have openings through which cooling air flowing through the condenser can pass. 3. The hydraulic excavator according to claim 1, wherein the fan means includes an electric motor for driving the fan to rotate.