WO2016084911A1

WO2016084911A1 - Hydraulic shovel

Info

Publication number: WO2016084911A1
Application number: PCT/JP2015/083270
Authority: WO
Inventors: 馨渡邉
Original assignee: 株式会社小松製作所
Priority date: 2015-11-26
Filing date: 2015-11-26
Publication date: 2016-06-02
Also published as: JP6054581B2; DE112015000192B4; JPWO2016084911A1; CN105814259B; DE112015000192T5; CN105814259A

Abstract

A hydraulic shovel provided with an upper rotating body, wherein the hydraulic shovel is provided with an engine compartment (62) in which an engine (61) is disposed, a covering member (67) for sealing and covering the top part of the engine compartment (62), an electrical component unit (E) having electrical components (E1, E2), and a support member (672) for supporting the electrical component unit (E) from below with a spacer (71) interposed therebetween. The electrical component unit (E) is disposed above the covering member (67) with a spacer (71) interposed therebetween.

Description

Excavator

The present invention relates to a hydraulic excavator.

Conventionally, electrical equipment such as a processing device (vehicle body controller) that processes information from sensors attached at predetermined locations is mounted on a hydraulic excavator. Since the electrical component has a lower heat-resistant temperature than other parts and needs to be hardly affected by the heat from the engine room, it is proposed to cool by an exclusive cooling structure (for example, see Patent Document 1). ).

In Patent Document 1, in a small canopy-type hydraulic excavator, electrical components are arranged on the side of an operator seat, and the electrical components are covered with an electrical component cover. The electrical component cover is provided with an air passage having an intake hole for sucking outside air at one end. The other end of the air passage opens to a position immediately before the intake of the cooling air with respect to the cooling fan for cooling the engine. Since the negative pressure is generated at the position immediately before the intake of the cooling air by the rotation of the cooling fan, the negative pressure is used to circulate the air from the outside into the electrical component cover through the air passage to cool the electrical component. .

By the way, as an electrical component, in addition to the above-described processing device, a communication terminal having a lower heat-resistant temperature may be added. Although these electrical components are unitized as electrical component units, the increase in electrical components inevitably increases the size of electrical component units. Difficult to place. Therefore, the electrical component unit is arranged behind the operator seat and directly above the engine room.

JP 2015-140156 A

However, if the electrical component unit is arranged directly above the engine room, it is likely to be affected by hot air rising from the engine room, so a structure for preventing heat from being propagated to the electrical component unit is required. In particular, when a communication terminal having a lower heat-resistant temperature is mounted, it is necessary to reliably suppress the thermal influence on the electrical component unit.

Therefore, it is conceivable to employ a cooling structure as in Patent Document 1 behind the operator seat. However, since the electrical component unit is arranged closer to the engine, in order to reliably cool the electrical component unit, there is a problem that a larger amount of air must be fed and the structure becomes complicated. .

On the other hand, a structure that covers and seals the upper part of the engine room so that hot air is not discharged to the upper electrical component unit side is also conceivable. However, since the member for covering the engine room is heated by the hot air, the heat from this member is affected, and the heat influence on the electrical component unit cannot be sufficiently suppressed.

One of the objects of the present invention is to provide a hydraulic excavator that can reliably suppress the influence of heat from the engine room to the electrical component unit with a simple structure.

A hydraulic excavator of the present invention is a hydraulic excavator provided with an upper swing body, an engine room in which an engine is disposed, a covering member that covers and covers the upper part of the engine room, an electrical component unit having electrical components, And a support member that supports the electrical component unit from below via a spacer, and the electrical component unit is disposed above the cover member via the spacer.

According to the present invention, since the electrical component knit is disposed above the covering member via the spacer, a space substantially parallel to the swiveling surface of the upper swing body is formed between the electrical component unit and the covering member. . For this reason, even if the cover member which covers an engine room becomes hot, propagation of the heat from a cover member to an electrical component unit can be suppressed. In addition, by opening such a space to the outside, fresh air can be circulated in the space by turning the upper revolving body, preventing air from staying in the space and improving the heat insulation effect. be able to. Therefore, the influence of heat from the engine room to the electrical component unit can be reliably suppressed with a simple structure in which a space is formed by the spacer between the electrical component unit and the cover member.

In the hydraulic excavator of the present invention, it is preferable that the covering member includes the support member.
In the hydraulic excavator of the present invention, it is preferable that the support member is disposed on a counterweight provided on an outer peripheral side of the upper swing body.
In the hydraulic excavator of the present invention, it is preferable that the electrical component is housed in a sealed housing space.
In the hydraulic excavator of the present invention, it is preferable that the electrical component unit has a bottom surface portion, and a heat insulating material is provided on a lower surface of the bottom surface portion.

1 is a side view showing a hydraulic excavator according to an embodiment of the present invention. The top view which shows the cab of a hydraulic excavator. The perspective view which shows the cover and electrical component which are mounted in a hydraulic excavator. It is sectional drawing of the principal part of a hydraulic shovel, and the arrow IV-IV sectional drawing in FIG.

[Schematic configuration of hydraulic excavator]
Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a side view showing a hydraulic excavator 1 according to the present embodiment. FIG. 2 is a plan view showing the cab of the excavator.
1 and 2, a hydraulic excavator 1 includes a crawler type lower traveling body 2 driven by a hydraulic motor, an upper revolving body 3 that is pivotably provided on an upper portion of the lower traveling body 2, and an upper revolving body. 3 and a working machine 4 for excavating soil and the like, and is configured as a small hydraulic excavator.

Of these, the upper swing body 3 includes a revo frame 31 provided with a swing hydraulic motor (not shown) at substantially the center. In the revo frame 31, the working machine 4, a cab 32 on which an operator gets on, and a counterweight 33 are arranged in order from the front side to the rear side. The counterweight 33 is disposed on the rear outer peripheral side of the upper swing body 3. positioned. In addition, the revo frame 31 is provided with a canopy 34 that covers the cab 32 from above.

Here, the canopy 34 includes a pair of pillars 34A erected on the left and right sides, and a roof 34B supported by the upper ends of the pillars 34A. The lower end of the column 34 A is supported by the upper surfaces of the left and right ends of the counterweight 33.

Although not shown, an engine room 62 that houses an engine 61 (see FIG. 4) is provided below the cab 32 in the revo frame 31, and the engine 61 is further below the engine room 62. A control valve that distributes the pressure oil pumped from the driven hydraulic pump to the lower traveling body 2 and the work machine 4 is disposed. On the right side of the cab 32, tanks such as a fuel tank, a hydraulic oil tank, and a sub tank for engine cooling water are arranged. In the present embodiment, front, rear, left, and right are directions based on an operator seated on the cab 32.

The work machine 4 includes a boom 41 attached to the revo frame 31 so as to swing up and down, an arm (not shown) attached to the tip of the boom 41 so as to swing up and down, and attached to the tip of the arm so as to swing up and down. And an unillustrated bucket. The boom 41, the arm, and the bucket are connected to the tip of a cylinder rod of the boom cylinder 41A, which is a hydraulic cylinder, the arm cylinder, and the bucket cylinder, respectively, and each cylinder rod is expanded and contracted by the pressure oil from the control valve. Oscillates.

Furthermore, in this embodiment which is a small hydraulic excavator 1, a blade 42 is provided at the front of the track frame 21 of the lower traveling body 2 as another working machine. The blade 42 is operated by a blade cylinder (not shown). The blade cylinder also expands and contracts with the pressure oil from the control valve.

[Configuration around the cab]
1 and 2, the cab 32 includes an operator seat 35 disposed substantially at the center, a console box 36 disposed on the left and right of the operator seat 35, and a work machine provided at the front of each console box 36. An electrical component E1, which is disposed in front of the lever 37 and the operator seat 35 and behind the pair of travel levers 38 projecting from the floor surface under the feet and the seat back 35A of the operator seat 35 and covered with a cover 39. E2 etc. are provided.

Below the operator seat 35 is provided an engine room 62 that reaches the counterweight 33 behind the revo frame 31. The engine room 62 is covered in a sealed state except for the lower revo frame 31 side. That is, the front of the engine room 62 is covered with a front wall 63 provided on the lower side of the operator seat 35, and the side is covered with a side wall 64, a side plate 65, an exterior cover 66, etc. Is covered with a covering member 67.

At this time, the cover member 67 includes an upper plate 671 provided integrally with the lower portion of the operator seat 35 and a support member 672 disposed on the upper portion of the counterweight 33. The upper plate 671 and the support member 672 are connected to each other on both the left and right sides via a damper mount (not shown) and a surrounding sealant.

The upper part of the engine room 62 is hermetically covered and covered with the covering member 67, so that the hot air from the cooling air after cooling the engine 61 is prevented from being discharged to the electrical components E1 and E2 disposed above the engine room 62. Yes. In FIG. 4 to be described later, a connection portion between the upper plate 671 and the support member 672 at a place other than the damper mount is shown. In this connection portion, the upper plate 671 and the support member 672 are connected to each other through sealing materials 67A and 67B provided respectively.

Also, the cover 39 covers the electrical components E1, E2, etc., thereby protecting them from rainwater and dust. The electrical components E1 and E2 are composed of a processing device that processes information from various sensors installed in the main part of the vehicle body, a communication terminal that communicates with the management center, etc., and is unitized as an electrical component unit E. Yes.

[Configuration of cover and electrical unit]
FIG. 3 shows a perspective view of the cover 39. 2 and 3, the cover 39 is made of synthetic resin. The cover 39 has a left concave portion 39A whose left end is located inside the column 34A of the canopy 34 and is recessed rightward so as to avoid the column 34A. On the other hand, the cover 39 has a right concave portion 39B that is recessed from the front to the rear so that the right end of the cover 39 extends to the outside of the column 34A and avoids the column 34A. Further, the cover 39 is low on both side portions, but the center portion located between the pillars 34A bulges upward, and the bulge portion covers the electrical component unit E.

The front surface portion of the bulging portion is adjacent to the seat back 35A of the operator seat 35, and a substantially rectangular opening 39C opened at a predetermined opening area is provided at a position on the left side of the front surface portion. Such a cover 39 includes a pair of bolts 39D inserted at positions separated from each other along the rear edge, and a bolt 39D inserted on the front side of the cup holder 39E provided on the right side. It is attached to 672.

As shown in FIGS. 2 and 3, the electrical component unit E includes an attachment frame 51 formed of a metal plate or the like to which the electrical components E1 and E2 are attached. The mounting frame 51 includes a plate-shaped bottom surface 52, a mounting portion 53 erected on the bottom surface 52 so that the front and back surfaces face front and rear, and a left side of the bottom surface portion 52 so that the front and back surfaces face left and right. A partition portion 54 erected at a close position and a bracket 55 provided on the left side surface of the partition portion 54 are provided. The bracket 55 is a member that receives the seat back 35 A of the reclining operator seat 35 and is inserted through the opening 39 C of the cover 39.

A sealing material 56 such as urethane resin is attached to the outer edges of the bottom surface portion 52 and the partition portion 54. A heat insulating material 52A (see FIG. 4) made of the same material as the sealing material 56 is attached to the lower surface of the bottom surface portion 52 so as to cover substantially the entire surface thereof. The electrical component E1 is attached to the front surface of the attachment portion 53, and the electrical component E2 is attached to the rear surface.

In a state where the electrical component unit E is covered with the cover 39, the internal space of the cover 39 is divided into left and right by the partition portion 54. The left space partitioned by the partitioning portion 54 communicates with the outside through the opening 39C and the opened lower side. The electrical component unit E is located in the right space. The further right side of the electrical component unit E is partitioned by a vertical rib (not shown) integrally formed inside the cover 39, and the right space partitioned by the vertical rib passes through the right concave portion 39B and the opened lower side. Communicate with the outside.

Further, in the cover 39, in addition to such vertical ribs, vertical ribs (see FIG. 4) are also provided at positions corresponding to the front and rear edges of the bottom surface portion 52. The lower ends of these vertical ribs are in contact with the sealing material 56 of the bottom surface portion 52. Therefore, inside the cover 39, the gap between the electrical component unit E and the inner surface of the cover 39 is closed by the sealing material 56 of the bottom surface portion 52 and the partition portion 54.

As a result, a sealed housing space 39F is formed inside the cover 39 as shown by a two-dot chain line in FIG. 3, and the electrical components E1 and E2 are housed in the housing space 39F. As a result, even if dust or rainwater or the like enters the cover 39 from both the left and right sides of the cover 39, the right side space is not reached, and the electrical components E1 and E2 are not affected. Although the electrical components E1 and E2 in the accommodation space 39F generate heat, such heat is transmitted to the cover 39 and radiated from the surface to the outside, so that there is no particular problem in terms of heat resistance.

[Insulation structure of electrical component unit]
4 is a cross-sectional view showing the heat insulation structure of the electrical component unit E, and is a cross-sectional view taken along arrows IV-IV in FIG.
In FIG. 4, of the covering member 67 that covers the upper portion of the engine room 62, the support member 672 is placed on the flat bottom surface 33 A of the step part formed one step lower on the counterweight 33. On the other hand, it is detachably fixed by a bolt 33B. The bolt 33 B penetrates the upper portion of the engine 61 inspection opening 33 C provided in the counterweight 33 and the support member 672, and is screwed into a nut 673 fixed to the upper surface of the support member 672. When the engine 61 is not inspected, the opening 33C is covered with an inspection cover (not shown).

Here, although a detailed description in the present specification is omitted, the excavator 1 is provided with a tilt mechanism that tilts the cab 32 with the front side of the cab 32 as a fulcrum. When the cab 32 is tilted, the bolt 33B is removed. Even if the fall prevention ring 33 D is screwed into the bolt 33 B and the bolt 33 B is removed from the support member 672, there is no fear that the bolt 33 B falls and is lost. When the cab 32 is tilted, the cover member 67 is lifted upward together with the cab 32, and the support member 672 is separated from the counterweight 33. Further, the cover 39 is removed, and buffering with the pillar 34A during tilting is prevented.

The electrical component unit E is disposed above the support member 672 via a plurality of spacers 71, and the electrical component unit E is supported by the support member 672. Since the support member 672 that supports the electrical component unit E constitutes a part of the cover member 67, it is not necessary to separately provide the cover member and the support member, and the structure can be further simplified. Further, since the support member 672 is placed on the firm counterweight 33, the electrical component unit E can be stably supported by the support member 672.

A space 72 is formed by the spacer 71 between the support member 672 and the electrical component unit E. Even when the covering member 67 is heated by the heat from the engine 61, the space 72 can make it difficult to transmit the heat to the electrical component unit E, so that a heat insulating effect can be obtained.

Further, the space 72 extends in a direction parallel to the turning surface of the upper turning body 3. The space 72 communicates with the outside through a gap 73 formed between the counterweight 33 and the cover 39 over a predetermined length along the circumferential direction on the outer periphery of the rear part. Therefore, when the upper swing body 3 turns, air flows in and out between the space 72 and the outside through the gap 73. This suppresses the retention of air in the space 72 and improves the heat insulating effect. In particular, since the gap 73 is provided on the outer peripheral side away from the turning center of the upper swing body 3, the speed at the time of turning can be increased and the inflow of air can be improved.

[Effect of the embodiment]
According to the present embodiment described above, there are the following effects.
That is, since the electrical component unit E is disposed above the cover member 67 via the spacer 71, a space substantially parallel to the swivel surface of the upper swing body 3 is provided between the electrical component unit E and the cover member 67. 72 can be formed. For this reason, even if the covering member 67 covering the engine room 62 becomes hot, the propagation of heat from the covering member 67 to the electrical component unit E can be suppressed.

Moreover, since such a space 72 is open to the outside, fresh air can be circulated in the space 72 by the turning of the upper swing body 3, and the retention of air in the space 72 is prevented. Thus, the heat insulation effect can be improved.

As described above, the influence of heat from the engine room 62 to the electrical component unit E can be reliably suppressed with a simple structure in which the space 72 is formed by the spacer 71 between the electrical component unit E and the covering member 67.

[Modification]
It should be noted that the present invention is not limited to the above-described embodiments, and modifications, improvements, and the like within the scope that can achieve the object of the present invention are included in the present invention.
For example, in the above-described embodiment, the support member 672 constitutes a part of the cover member 67. However, in the present invention, the support member may be configured as a separate member from the cover member. Specifically, the cover member is configured as a single member that covers the entire upper portion of the engine room 62, and a support member that is a separate member from the cover member is disposed immediately below the cover member and fixed to the counterweight 33 or the like. The support member is provided with a plurality of spacers penetrating the cover member, and the electrical component unit E is supported by the support member through the spacers. Such a configuration is also included in the present invention.

In the above embodiment, the cab 32 can be tilted. However, in the present invention, it does not matter whether the cab is tilted or not.
The electrical component unit used in the present invention is not limited to a control device used as a vehicle body controller or a communication terminal for communication, but may be a radio tuner, a battery, or the like. However, when a control device or a communication terminal having a low heat-resistant temperature is used, the effect of the present invention can be made more conspicuous. Therefore, it is desirable to configure an electrical component unit using them.
In addition, the electrical component unit need not be composed of a plurality of electrical components, and may be composed of a single electrical component.

The present invention can be suitably used particularly for a canopy type small hydraulic excavator.

DESCRIPTION OF SYMBOLS 1 ... Hydraulic excavator, 3 ... Upper turning body, 61 ... Engine, 62 ... Engine room, 67 ... Cover member, E1, E2 ... Electrical component, E ... Electrical component unit, 71 ... Spacer, 672 ... Support member, 33 ... Counter Weight, 39F ... accommodating space, 52 ... bottom surface, 52A ... heat insulating material.

Claims

A hydraulic excavator provided with an upper swing body,
An engine room where the engine is located,
A covering member that seals and covers the top of the engine room;
An electrical component unit having electrical components;
A support member that supports the electrical component unit from below via a spacer,
The electric component unit is disposed above the cover member with the spacer interposed therebetween.
The hydraulic excavator according to claim 1,
The cover member is configured to include the support member.
The hydraulic excavator according to claim 1 or 2,
The hydraulic excavator, wherein the support member is disposed on a counterweight provided on an outer peripheral side of the upper swing body.
The hydraulic excavator according to any one of claims 1 to 3,
The electric component is accommodated in a sealed accommodation space.
The hydraulic excavator according to any one of claims 1 to 4,
The electrical component unit has a bottom surface;
A hydraulic excavator, wherein a heat insulating material is provided on a lower surface of the bottom surface portion.