JP3234477B2 - Battery storage structure for construction machinery - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a battery accommodating structure of a construction machine represented by a crawler crane.

[0002]

2. Description of the Related Art As a conventional battery housing structure of a construction machine, for example, those disclosed in Japanese Utility Model Publication No. 3-49163 and Japanese Patent Application Laid-Open No. Hei 6-107091 are known. In these prior arts, the battery is housed in the front part of the construction machine body even though the engine is mounted in the rear part of the construction machine body, so that the engine starter and the battery relay are connected. There is a problem that the connection wiring between them becomes long, and the wiring work becomes complicated.

An object of the present invention is to provide a battery housing structure of a construction machine in which connection wiring between a prime mover and a battery can be minimized.

[0004]

FIG. 3 shows an embodiment of the present invention.
The battery housing structure for a construction machine according to the present invention is formed in a construction machine main body 2 and includes a prime mover 1.
1 and a cooling mechanism 12 thereof, and a motor room provided on an upper surface of a side end portion of the cooling mechanism 12 and having an inlet 17 for introducing cooling air for the motor and an outlet 18 for discharging the introduced air. 10 and a guide plate 19 for guiding the cooling air introduced into the engine room 10 from the inlet 17 to the cooling mechanism 12. The guide plate 19 separates the space 20 adjacent to the engine room 10 from the battery 21.
Is a battery chamber for accommodating the battery. According to this, the connection wiring between the battery 21 and the prime mover 11 can be shortened as much as possible. According to the second aspect of the present invention, a door 22 for opening and closing the battery chamber 20 is provided on a side surface of the construction machine main body 2. According to the third aspect of the present invention, the guide plate
And a drainage mechanism 19a for draining rainwater or the like that has entered the prime mover room 10 from the outside.

[0005] In the section of the means for solving the above-mentioned problems, which explains the configuration of the present invention, the drawings of the embodiments are used to facilitate understanding of the present invention. However, the present invention is not limited to this.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the present invention is applied to a battery accommodation structure of a crawler crane will be described with reference to FIGS. FIG. 1 is a side view of a crawler crane according to the present embodiment, and FIG. 2 is a plan view thereof. Reference numeral 1 denotes a lower traveling body, 2 denotes an upper revolving superstructure, and a boom 3 is connected to a front portion of the upper revolving superstructure 2 so as to be able to undulate. A rope 4 pulled out from a winch provided on the upper swing body 2 is wrapped around the tip of the boom 3, and a suspended load 6 is hung by a hook 5 connected to the tip of the rope 4. A counter weight 6 is attached to a rear portion of the upper revolving superstructure 2.

FIG. 3 is a sectional view taken along the line III-III of FIG. 1, and FIG. 4 is a sectional view taken along the line IV-IV of FIG. The upper revolving superstructure 2 is provided with an engine room 10 at a rear portion thereof, specifically, just in front of the counterweight 6, where an engine 11 is mounted horizontally. 12 is a radiator, 13 is a radiator fan rotated by the engine 11, and 14 is the engine 1.
1 is a working or running hydraulic motor driven by the speed reducer 15 by the
0. Reference numeral 16 denotes a pair of support members extending in the front-rear direction of the revolving superstructure. The radiator 12 and the speed reducer 15 are respectively supported on the upper portions thereof, and the counter weight 6 is also mounted on the support members 16.

An air inlet 17 is provided on the upper surface of the radiator side end of the engine room 10, and an air outlet 18 is provided on a side surface of the hydraulic motor side end. Reference numeral 19 denotes a partition wall which is gently curved from the left end portion of the air inlet 17 in the figure to the lower side of the radiator 12. It is extended to. The partition wall 19 forms a space 20 isolated from the engine room 10 and serves as a battery room.

The curved surface is provided on the partition wall 19 in order to efficiently send air to the radiator 12. That is, when the radiator fan 13 rotates, the air introduced from the air inlet 17 is guided by the curved surface of the partition wall 19 and is efficiently guided to the radiator 12, thereby contributing to cooling of the engine coolant. The air after the heat exchange in the radiator 12 is discharged from the air discharge port 18 to the outside. As shown in the enlarged view of FIG. 19a, and is discharged downward through a hose HS. Therefore, rainwater or the like does not enter the battery chamber 20. Further, since the air inlet 17 is provided above the upper swing body 2, noise given to the surroundings can be reduced as compared with the case where the air inlet 17 is provided on the side.

An opening 20a for communicating the battery chamber 20 with the outside is formed on a side surface of the revolving unit 2, and a door 22
(Also shown in FIG. 1). By opening the door 22, the battery 21 can be mounted / removed in the battery chamber 20. Since the space above the battery installation location is relatively wide due to the shape of the partition wall 19, the mounting /
Removal work can be done easily.

A battery relay 23 is fixed to a portion of the front wall 10a located in the battery compartment, and the battery 21 is connected to the starter 11a of the engine 11 by a wiring member 24 via the battery relay 23. As described above, in the present embodiment, since battery 21 is arranged near engine 11, the length of wiring member 24 connecting battery 21 and engine 11 can be minimized.
In addition, since the battery chamber 20 is provided on the cooling air introduction side, the air that has become hot due to heat exchange with the radiator 12 does not act on the battery 21, and the battery 21 is not adversely affected by heat.

Further, in this embodiment, since the battery 21 is disposed at the rear of the upper swing body 2, the following effects can be obtained. Generally the maximum lifting load Wmax in crawler cranes has a weight W ₀ of the crane shown in FIG. 1, the horizontal distance L from the leading edge position A of the ground portion to the center of gravity position B
1, by using the horizontal distance L2 to the load 6 suspended from position A, represented by _{Wmax = (W 0 × L1)} / L2. That is, the longer the L1, the larger the maximum lifting load Wmax can be. By the way, recently, in order to improve workability in relatively narrow construction sites,
There has been a demand for minimizing the length R from the turning center to the rear end of the counterweight 6 as much as possible. However, if R is simply reduced, the center of gravity position B moves forward and L1 is shortened, so that the maximum lifting load Wmax is reduced and the crane capacity is reduced. In the present embodiment, since the battery 21, which is a relatively heavy object, is disposed at the rear portion of the revolving structure 2, even if R is shortened, the forward movement of the position of the center of gravity can be suppressed. In other words, L1 Can be shortened without significantly shortening the crane capacity, as compared with the conventional case where the battery is mounted on the front portion of the revolving unit 2 as in the related art.

In the above embodiment, the undercarriage 1
And the upper revolving superstructure 2 is a construction machine main body, the engine 11 is a prime mover, the radiator 12 is a cooling mechanism, the engine room 10 is a prime mover room, the partition 19 is a guide plate, and the drain groove 1
9a and hose HS constitute a drainage mechanism, respectively.

Although an example in which a curved surface is provided in the partition wall 19 has been described above, a slope may be used as long as air can be efficiently guided to the radiator. Although an example using two batteries has been described, one battery or three or more batteries may be used. Further, the present invention can be applied to a case where the engine is mounted vertically.
In addition, although the description has been made of the crawler crane, the present invention can be similarly applied to a battery housing structure of a hydraulic shovel or other construction machines.

[0015]

According to the present invention, since the space separated from the prime mover chamber by the guide plate for guiding the cooling air to the cooling mechanism is a battery chamber, the prime mover and the battery can be arranged close to each other, and the connection wiring between them can be provided. Can be shortened to a minimum, so that complicated wiring work is not required. Further, since the guide plate also serves as a member that separates the engine room and the battery room, the number of parts can be reduced, and the space in the construction machine body can be efficiently used. Further, since the battery is disposed on the side where the cooling air is introduced, the heated air does not act on the battery, so that the influence of heat on the battery can be prevented.

[Brief description of the drawings]

FIG. 1 is a side view of a crawler crane according to an embodiment of the present invention.

FIG. 2 is a plan view of a crawler crane.

FIG. 3 is a sectional view taken along line III-III of FIG. 1;

FIG. 4 is a sectional view taken along line IV-IV of FIG. 3;

FIG. 5 is a sectional view of a main part of a partition.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Lower traveling body 2 Upper revolving structure 3 Boom 4 Rope 5 Hook 6 Hanging load 10 Engine room 11 Engine 11a Starter 12 Radiator 13 Radiator fan 14 Hydraulic motor 17 Air inlet 18 Air outlet 19 Partition wall 20 Battery room 21 Battery 22 Door 23 Battery relay 24 Wiring member HS hose

──────────────────────────────────────────────────続 き Continuation of front page (56) References JP-A-7-61245 (JP, A) JP-A-64-47640 (JP, A) JP-A-63-160250 (JP, U) JP-A-4-160250 106013 (JP, U) Japanese Utility Model Showa 52-12919 (JP, U) (58) Field surveyed (Int. Cl. ⁷ , DB name) B60R 16/04

Claims (3)

(57) [Claims] 1. A motor and a cooling mechanism for the motor are provided on a construction machine main body, and a side of the cooling mechanism is provided.
An inlet provided on the upper surface of the end for introducing the motor cooling air, and a motor chamber having a discharge port for discharging the introduced air, and the cooling air introduced into the motor chamber from the inlet. And a guide plate leading to a cooling mechanism, wherein a space isolated adjacent to the engine room by the guide plate is a battery chamber for housing a battery. 2. The battery housing structure for a construction machine according to claim 1, wherein a door that opens and closes the battery chamber is provided on a side surface of the construction machine body. 3. The construction machine according to claim 1, wherein the guide plate is provided with a drainage mechanism for discharging rainwater or the like that has entered the prime mover chamber from the introduction port to the outside. Battery storage structure.