JPH09221790A - Totally revolving type working machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To ensure the disposal space of a battery relay in consideration of a waterproof countermeasure and the facility of inspection and maintenance. SOLUTION: A side bumper 37 surrounding a section between a driver' s cab and a frame 25 from the left side direction of an upper revolving superstructure is installed to the upper revolving superstructure of a small revolving type hydraulic backhoe while a parting plate 33 is mounted on the frame 25 as being placed between the driver's cab and a machine room. A battery relay 34 is fixed at the left end section of the parting plate 33 so as to be placed in a space formed between the driver's cab and the frame 25 by the side bumper 37. Accordingly, the place of the disposal of the battery relay 34 can be ensured easily, and the infiltration of rainwater to the battery relay 34 side can be prevented while maintenance can be facilitated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fully revolving type working machine having a lower traveling body and an upper revolving body such as a hydraulic excavator.

[0002]

2. Description of the Related Art FIGS. 7 and 8 show a hydraulic excavator as an example of a conventional full swing type working machine.

In the figure, 1 is a hydraulic excavator, 2 is a lower traveling body of the hydraulic excavator 1, and 3 is an upper revolving body mounted on the lower traveling body 2 via a revolving device 4 so as to be revolvable. A machine room 6, a driver's cab 7, and a counterweight 8 are provided on a frame 5 of the upper swing body 3, and a working device 9 is provided on the front side of the frame 5 so as to be able to move up and down. An engine, a hydraulic pump, a radiator and the like (all not shown) are arranged in the machine room 6.

Reference numeral 10 denotes a battery relay arranged on the left side in the machine room 6, and the battery relay 10 is shown in FIG.
Support beam 1 for supporting the building of machine room 6 as shown in
1 is attached. Then, the battery relay 10
Is for applying a drive voltage from a battery (not shown) to a starter (not shown) of the engine when the hydraulic excavator is started.

A waterproof cover 12 is provided outside the battery relay 10, and the battery relay 10 is arranged in the waterproof cover 12. As a result, the battery relay 10 is protected from rainwater and the like that enter from the outside of the machine room 6.

In the conventional hydraulic excavator constructed as above, when the operator depresses the engine starting switch provided in the cab 7, the battery relay 10 is activated.
Is turned on and the drive voltage is applied from the battery to the starter of the engine. As a result, the engine is started, and the hydraulic system control device such as the hydraulic pump starts driving.

[0007]

By the way, in the hydraulic excavator 1 according to the prior art, the inside of the machine room 6 is relatively large, and the battery relay 10 is arranged in the machine room 6. For medium-sized hydraulic excavators,
Since the upper swing body 3 becomes smaller, the accommodation space in the machine room 6 becomes narrower. Especially in a narrow work site, etc.
In the case of a so-called small swing excavator (see Japanese Utility Model Laid-Open No. 63-36567) in which the swing radius of the upper swing body 3 is reduced so that the upper swing body 3 can be swung together with the working device 9,
The space inside is made as small as possible.

On the other hand, the hydraulic excavator requires many devices such as an engine, a hydraulic pump, a radiator, and a cooling fan, and the machine room 6 must have a minimum space for accommodating these devices. I have to. As a result,
When the swing radius of the upper swing body 3 is reduced, it is difficult to secure a space for disposing the battery relay 10 in the machine room 6.

Further, in order to protect the battery relay 10 from rainwater or the like, it is necessary to take waterproof measures such as attaching a waterproof cover 12 and to arrange the battery relay 10 in a place where rainwater or the like is less likely to splash. There is. Further, since the battery relay 10 has to be installed in a place where inspection and maintenance are easy, there is a problem that it is more difficult to secure the installation place of the battery relay 10.

The present invention has been made in view of the above-mentioned problems of the prior art. Even when the upper revolving structure is made small in order to reduce the turning radius, the space for disposing the battery relay can be secured and the waterproofness of the battery relay can be ensured. It is an object of the present invention to provide a full swing working machine capable of reducing the number of members for countermeasures and easily performing inspection and maintenance of a battery relay.

[0011]

In order to solve the above-mentioned problems, an invention according to claim 1 is directed to a lower traveling body, an upper revolving body rotatably mounted on the lower traveling body, and the upper revolving body. A machine room on the frame of the body, in which the engine is housed, a driver's cab located on the front side of the machine room and on the frame, and a work on the front side of the frame In a full swing working machine comprising a device and a battery relay for applying a voltage to a starter for starting the engine, the upper swing body has a space between the cab and a frame on the side of the upper swing body. A protective cover is provided so as to surround it from one side, and the battery relay is arranged in a space formed between the cab and the frame by the protective cover.

With the above structure, even when the machine room is narrowed because the upper revolving structure is made small so that a small turning is possible, the battery cover is installed at a place between the cab and the frame by the protective cover. It can be secured in the space formed in. By disposing the battery relay in the space, the battery relay can be substantially shielded from the outside.

According to the second aspect of the present invention, a partition plate is provided on the frame between the driver's cab and the machine room, and the battery relay is partially surrounded by the protective cover. The structure that is fixedly provided at the end is adopted.

With the above structure, the battery relay can be disposed so as to face the machine room, and the battery relay can be more surely protected by the protective cover. Further, since the battery relay is fixedly provided at the end of the partition plate, when the worker removes the protective cover from the frame or the like of the upper revolving structure for inspection and maintenance of the battery relay, It is easily reachable and easy to inspect and maintain.

Further, in the invention according to claim 3, the protective cover is provided with a side plate portion curved in an arc shape corresponding to a turning radius of the upper swing body, and an inner side of the upper swing body from an upper end of the side plate portion. The upper plate portion extending toward the lower plate portion and the lower plate portion extending from the lower end of the side plate portion toward the inside of the upper revolving structure so as to have a substantially U-shaped cross section, and the side plate portion of the protective cover, The battery relay is partially surrounded by the upper plate and the lower plate.

As described above, the side plate portion of the protective cover is formed so as to be curved in an arc shape corresponding to the turning radius of the upper revolving structure, so that the revolving radius of the upper revolving structure can be minimized. Is possible. Further, since the battery relay is located inside the protective cover formed of the side plate portion, the upper plate portion, and the lower plate portion and having a substantially U-shaped cross section,
The battery relay is substantially shielded from the outside of the upper swing body.

[0017]

FIG. 1 is a block diagram showing an embodiment of the present invention.
6 to 6 will be described in detail.

In the drawing, reference numeral 21 denotes a hydraulic excavator according to the present embodiment, which is similar to the hydraulic excavator 1 according to the prior art, and can be turned on the lower traveling body 22 and the lower traveling body 22. Upper revolving structure 23 mounted
The upper revolving structure 23 and the lower traveling structure 2 are composed of
A turning device 24 is provided between the two.

A machine room 26 is provided on the rear side of the frame 25 constituting the frame of the upper revolving structure 23, and a driver room 27 is provided on the front side of the machine room 26 and on the left side of the frame 25. Has been. Further, a counterweight 28 is attached to the rear side of the machine room 26, and a working device 29 is attached to the front side of the frame 25 so as to be able to move up and down.

However, the hydraulic excavator 21 according to this embodiment is
Is smaller than the conventional hydraulic excavator 1,
This is a so-called small turning excavator in which the turning radius R of the upper turning body 23 is made small so that the upper turning body 23 can be turned in a narrow work site. Has become. As shown in FIG. 2, the upper swing body 23 of the hydraulic excavator 21 is formed in a substantially circular shape when viewed from above in order to reduce the swing radius R.

The frame 25 of the upper swing body 23 is
As shown in FIG. 3 or 4, the bottom plate 25A, which is a flat plate formed in a substantially circular plate shape, and the work device 29, which is located approximately in the middle in the width direction of the bottom plate 25A and extends in the front-rear direction.
It is roughly composed of a pair of beams 25B, 25B which also serve as a support bracket for rotatably supporting the base end side of the.

On the left side of the bottom plate 25A of the frame 25, there are provided four fixing portions 25C, 25C, ... For fixing the cab 27 on the frame 25, and the rear portion of the bottom plate 25A is fixed. The engine 30 and the engine 3 on the side
A starter 31 serving as a starting motor for starting 0,
A battery 32, which is a common power source for the starter 31, etc., is mounted.

At the left end of the bottom plate 25A, mounting plates 25D, 25D, 25D for mounting an upper plate portion 37B of a side bumper 37, which will be described later, are provided on the left edge of the bottom plate 25A from the front side to the rear side of the bottom plate 25A. 3 along the curve of
It is provided in places. Similarly, at the left end portion of the bottom plate 25A, four bolt holes 25E, 25E, ... For attaching a lower plate portion 37C of a side bumper 37 described later are formed.

Reference numeral 33 denotes a partition plate located between the operator's cab 27 and the machine room 26 and provided on the bottom plate 25A of the frame 25. The partition plate 33 is the left side of each beam 25B of the frame 25. Is a metal long plate extending in the width direction on the bottom plate 25A from the beam 25B to the left end of the bottom plate 25A, and the partition plate 33 is fixed to the bottom plate 25A by welding or the like. Then, of the fixed parts 25C, the two fixed parts 25C located on the rear side of the cab 27,
25C is fixed to the partition plate 33 by means such as welding.

Reference numeral 34 denotes a battery relay arranged at the left end of the partition plate 33. The battery relay 34 is
Similar to the battery relay 10 according to the related art, a voltage is applied to the starter 31 for starting the engine 30.

The battery relay 34 is composed of a cylindrical relay body 34A and a bracket 34B provided on the base end side of the relay body 34A. The relay body 34A has terminals 34C, 34C ,. The starter 31 of the engine 30 and the battery 32 are connected via a lead wire or the like.

When the operator depresses the engine start switch provided in the operator's cab 27, the battery relay 34 is turned on, whereby the drive voltage is applied from the battery 32 to the starter 31 of the engine 30, The engine 30 is designed to start.

Reference numeral 35 is a partition plate 3 for the battery relay 34.
3 shows a mounting bracket for fixing to the left end of 3,
The mounting bracket 35 is attached to the partition plate 3 by means such as welding.
3 is fixed. Then, the battery relay 34
Are fixed to the mounting bracket 35 via bolts 36, 36.

Reference numeral 37 denotes a side bumper as a protective cover that surrounds the cab 27 and the frame 25 from the side of the upper swing body 23. The side bumper 37 obstructs the side of the upper swing body 23. In the event that an object or the like collides, it not only has a function as a bumper for absorbing the impact, but also forms an accommodation space 38 described later together with the cab 27 and the frame 25, and partially forms the battery relay 34. It also has a siege function.

The side bumper 37 has a side plate portion 37A curved in an arc shape corresponding to the turning radius R of the upper swing body 23, and extends from the upper end of the side plate portion 37A toward the inside of the upper swing body 23. Upper plate portion 37B and the side plate portion 37A
And a lower plate portion 37C extending inward from the lower end of the upper revolving structure 23 to form a substantially U-shaped cross section.

Further, the upper plate portion 37B of the side bumper 37
And lower plate portion 37C have a plurality of bolt holes 37D and 3D, respectively.
7D, ... (Only three are shown) are drilled. And
By bolting each bolt hole 37D of the side bumper 37 to each mounting plate 25D and each bolt hole 25E of the frame 25, the side bumper 37 is detachably attached to the upper swing body 23 from the outside. There is. And
When the battery relay 34 is to be inspected, serviced, etc., the side bumper 37 is removed from the upper swing body 23.

Here, the side bumper 37 is connected to the cab 2
7 and the frame 25 are provided so as to surround the upper revolving structure 23 from the outside, so that the space between the bottom surface of the cab 27 and the bottom plate 25A of the frame 25 is accommodated as shown in FIG. A space 38 is formed. The battery relay 34 arranged at the left end of the partition plate 33 is
It is located in the accommodation space 38.

Further, since the battery relay 34 is arranged at the left end portion of the partition plate 33, the side plate portion 37A, the upper plate portion 37B and the lower plate portion 37C of the side bumper 37.
Partially surrounded by.

That is, as shown in FIG. 6, the left side of the battery relay 34 is the side plate portion 37A, the upper side of the battery relay 34 is the upper plate portion 37B and the bottom surface of the operator's cab 27, and the lower side of the battery relay 34 is the lower side. It is surrounded by the plate portion 37C and the bottom plate 25A of the frame 25, respectively. The front of the battery relay 34 is surrounded by a partition plate 33.

The hydraulic excavator 21 according to the present embodiment has the above-described structure, and the side bumper 37 is provided between the operator cab 27 and the bottom plate 25A of the frame 25 so that the upper revolving superstructure 2 is provided.
3 is mounted so as to be surrounded from the side, thereby forming an accommodation space 38 between the cab 27 and the bottom plate 25A of the frame 25, and disposing the battery relay 34 in the accommodation space 38. The battery relay 34 can be substantially shielded from the outside.

That is, the accommodation space 38 is a space substantially shielded by the side bumper 37, the operator's cab 27, and the bottom plate 25A of the frame 25, so that rainwater or the like can be prevented from entering from the outside. Therefore, the battery relay 34 arranged in the accommodation space 38 is
It is substantially shielded from the outside, rainwater, etc.
No dust such as sand will adhere.

Further, the battery relay 34 is fixed to the left end portion of the partition plate 33, and is arranged so as to be partially surrounded by the side plate portion 37A, the upper plate portion 37B and the lower plate portion 37C of the side bumper 37. By doing so, the battery relay 34 is more reliably shielded from the outside.

The battery relay 34 is connected to the partition plate 3
By disposing the battery relay 34 in FIG. 3, the battery relay 34 comes to face the inside of the machine room 26, and the battery relay 34 is
It can be arranged in a place close to the battery 32 arranged in the machine room 26. As a result, the battery 32,
Connection between the battery relays 34 becomes easy.

Thus, according to this embodiment, the upper swing body 23 is provided with the side bumper 37 that surrounds the space between the cab 27 and the frame 25 from the side of the upper swing body 23.
Since the battery relay 34 is arranged in the accommodation space 38 formed by the side bumper 37 between the driver's cab 27 and the bottom plate 25A of the frame 25, the side bumper 37, the driver's cab 27 and the frame 25 are arranged. The battery relay 34 can be partially surrounded by the bottom plate 25A, and the battery relay 34 can be substantially shielded from the outside of the upper swing body 23.

Particularly, the side bumper 37 is attached to the side plate portion 37.
A, the upper plate portion 37B and the lower plate portion 37C are formed to have a substantially U-shaped cross section, and the battery relay 34 is formed by the side plate portion 37A, the upper plate portion 37B and the lower plate portion 37C of the side bumper 37. Because it is configured to partially surround,
With the side bumper 37, the battery relay 34 can be more reliably shielded from the outside in the accommodation space 38.

Therefore, even when the inside of the machine chamber 26 is narrow, as in the small turning type hydraulic excavator 21 shown in this embodiment, the location of the battery relay 34 can be easily secured and the battery relay 34 can be externally provided on the battery relay 34 side. Therefore, it is possible to prevent rainwater or the like from entering or adhering, and it is possible to reliably prevent an accident or a failure due to a short circuit or the like of the battery relay 34.

Further, according to this embodiment, the battery relay 34 is accommodated in the accommodation space 38 formed by the side bumper 37 between the cab 27 and the bottom plate 25A of the frame 25.
By disposing the battery relay 34 inside, the battery relay 34 can be sufficiently protected from rainwater and the like, so that it is not necessary to separately provide the waterproof cover 12 and the like unlike the hydraulic excavator 1 according to the related art, and the number of parts can be reduced. At the same time, the inspection and maintenance of the battery relay 34 can be simplified.

A partition plate 33 is provided on the bottom plate 25A of the frame 25 between the driver's cab 27 and the machine room 26, and the battery relay 34 is surrounded by the side bumper 37 so as to be partially surrounded by the partition plate 33. The battery relay 34 can be disposed so as to face the inside of the machine room 26, and when the worker performs inspection and maintenance of the battery relay 34, Simply remove the side bumper 37 from the upper swing body 23,
The battery relay 34 can be easily reached, and the inspection and maintenance of the battery relay 34 can be facilitated.

In the above embodiment, the battery relay 34 is arranged at the left end of the partition plate 33, and the battery relay 34 is partially surrounded by the side bumper 37 attached from the left side of the upper swing body 23. However, the present invention is not limited to this, and in the case of a hydraulic excavator in which the cab is arranged on the right side of the upper swing body, a battery relay is provided at the right end of the partition plate provided on the right side of the frame. The battery relay may be arranged and partially surrounded by the side bumper attached from the right side of the upper swing body.

Further, in the above-mentioned embodiment, the side cover 37 having a function of absorbing a shock at the time of collision with an obstacle is described as an example of the protective cover, but the present invention is not limited to this. Alternatively, a flat plate formed of a material similar to the metal plate material forming the outer wall of the cab 27 or the machine room 26 may be used as a protective cover and may be attached between the cab 27 and the frame 25.

Further, in the above embodiment, the small swing hydraulic excavator 21 was described as an example of the full swing working machine, but the present invention is not limited to this, and can be applied not only to a medium hydraulic excavator. It can also be applied to other full swing working machines such as hydraulic cranes.

[0047]

As described in detail above, according to the invention described in claim 1, the upper revolving superstructure is provided with the protective cover surrounding the space between the operator's cab and the frame from the side of the upper revolving superstructure.
Since the battery relay is arranged in the space formed between the cab and the frame by the protective cover, the battery relay can be partially surrounded by the protective cover, the cab, and the frame. It is possible to prevent rainwater and the like from entering the relay side from the outside and to reliably prevent accidents and failures due to a short circuit or the like of the battery relay.

By disposing the battery relay with a protective cover in the space formed between the operator's cab and the frame, the battery relay can be sufficiently protected from rainwater and the like. Since it is not necessary to separately provide a dedicated cover for waterproofing the relay, the number of parts can be reduced, and even in the case of a small or medium-sized full swing type working machine such as a so-called small swing excavator, the battery relay can be installed. A place can be easily secured.

According to the second aspect of the present invention, a partition plate is provided on the frame between the operator's cab and the machine room, and the partition plate is partially surrounded by the protective cover. Since it is fixedly provided at the end of
The battery relay can be arranged so as to face the machine room, and when an operator inspects or maintains the battery relay, the battery relay can be easily reached by simply removing the protective cover from the upper swing body. This makes it easier to inspect and maintain the battery relay.

According to the third aspect of the present invention,
From the lower end of the side plate part, the side plate part that curves the protective cover in an arc shape corresponding to the turning radius of the upper revolving structure, the upper plate part that extends from the upper end of the side plate part toward the inside of the upper revolving structure, and the lower end of the side plate part. The lower revolving body extending toward the inside of the upper revolving body is formed to have a substantially U-shaped cross section, and the battery relay is partially formed by the side plate portion, the upper plate portion, and the lower plate portion of the protective cover. Since it is configured to be surrounded, the turning radius of the upper swing body can be minimized, and at the same time, the battery relay can be arranged so as to be substantially shielded from the outside, and the battery relay can be protected from rainwater or the like. It can be surely protected.

[Brief description of drawings]

FIG. 1 is an external view showing a hydraulic excavator according to an embodiment of the present invention.

FIG. 2 is a plan view of the hydraulic excavator in FIG. 1 seen from above with a working device removed.

3 is a perspective view showing a frame, a side bumper, a battery relay and the like of the hydraulic excavator in FIG.

FIG. 4 is a plan view showing a frame, a battery relay and the like in FIG.

5 is an enlarged view of a main part showing a frame, a battery relay and the like in FIG.

FIG. 6 is a sectional view taken along line VI-VI in FIG.

FIG. 7 is an external view showing a hydraulic excavator according to a conventional technique.

8 is a cross-sectional view showing a battery relay and the like provided in the hydraulic excavator in FIG.

[Explanation of symbols]

 21 hydraulic excavator (full swing work machine) 22 lower traveling body 23 upper swing body 25 frame 26 machine room 27 operator's cab 29 working device 30 engine 31 starter 33 partition plate 34 battery relay 37 side bumper (protective cover) 37A side plate portion 37B Upper plate 37C Lower plate

Claims (3)

[Claims] 1. A lower traveling body, an upper revolving body rotatably mounted on the lower traveling body, a machine room provided on a frame of the upper revolving body and accommodating an engine therein, and the machine room. A driver's cab located on the front side of the frame, a working device provided on the front side of the frame, and a battery relay for applying a voltage to a starter for starting the engine. In the fully revolving work machine, a protective cover is provided on the upper revolving structure so as to surround a space between the cab and the frame from a side of the upper revolving structure, and the battery relay is provided by the protective cover to the cab and the frame. A fully revolving work machine characterized by being arranged in a space formed between and. 2. A partition plate is provided on the frame between the driver's cab and a machine room, and the battery relay is fixed to an end portion of the partition plate so as to be partially surrounded by the protective cover. The fully swivel work machine according to claim 1, which is configured to be provided as a structure. 3. The protective cover includes a side plate portion curved in an arc shape corresponding to a turning radius of the upper swing body, and an upper plate portion extending from an upper end of the side plate portion toward the inside of the upper swing body. A side plate part, an upper plate part, and a lower plate part of the protective cover, which are formed to have a substantially U-shaped cross section from a lower plate part extending from the lower end of the side plate part toward the inside of the upper swing body. The fully swiveling work machine according to claim 1 or 2, wherein the battery relay partially surrounds the battery relay.