JP6959890B2 - Construction machinery - Google Patents

Description

The present invention relates to a construction machine provided with a fuel supply device.

Conventionally, in a swivel construction machine such as a hydraulic excavator, a fuel tank for storing fuel and a fuel supply device for supplying fuel to the fuel tank are both mounted on an upper swivel body. Are known. However, since a large number of devices are arranged on the upper swivel body, it is difficult to secure a sufficient space on the upper swivel body for arranging the fuel supply device. Therefore, for example, in Patent Document 1, a fuel supply device having a unit structure in which a refueling pump and a fuel supply hose are housed in a storage case is placed in a narrow space in front of a fuel tank installed on a swivel frame. It is placed in the department.

JP-A-2002-266377

Poor fuel may be used depending on the site where construction machinery such as a hydraulic excavator is used, and in order to deal with this, it is necessary to equip the fuel supply device with a filter for purifying the inferior fuel. However, in the fuel supply device described in Patent Document 1, it is difficult to secure a space sufficiently large for arranging a filter having a size necessary for purifying inferior fuel. In addition, since all the equipment constituting the fuel supply device is arranged on the upper swing body, it is difficult to perform the fuel supply work at a high place.

Therefore, an object of the present invention is to provide a construction machine in which fuel supply work is easy while securing a space of an area necessary for arranging a filter for purifying fuel.

In order to achieve the above object, the present invention includes a lower traveling body provided with a chassis frame and a pair of left and right front wheels and rear wheels, and an upper rotating body provided so as to be rotatable above the lower traveling body. A fuel supply device having a filter for purifying the fuel supplied to the fuel tank arranged in the upper swing body, and an ascending / descending device provided between the front wheels and the rear wheels on the side of the lower traveling body. a step, a construction machine equipped with, provided between the elevating step and said chassis frame in the side of the lower traveling body, a body which houses the filter inside, opened and closed on the top of the body a filter housing case having a lid which is attached, to the filter housing case, together with the lifting step, the storage position before Symbol lower the a at the side toward the lower traveling body to be included within the scope of vehicle width It is characterized by being provided with a moving mechanism for moving the traveling body to and from a working position outside the range of the vehicle width.

According to the present invention, it becomes easy to perform fuel supply work while securing a space of an area required for arranging a filter for purifying fuel. Issues, configurations and effects other than those described above will be clarified by the description of the following embodiments.

It is a perspective view which shows the appearance of the hydraulic excavator which concerns on embodiment of this invention. It is a perspective view which shows the lower traveling body. It is a perspective view which shows the filter accommodating case attached to the elevating device and the inside thereof. It is a figure which shows the filter accommodating case and its periphery in an enlarged manner. The mounting structure of the filter accommodating case is shown, and it is the figure which shows in the direction which looks up from the lower part of the lower traveling body. It is a figure which shows the state which the filter accommodating case is arranged in the working position.

Hereinafter, as one aspect of the construction machine according to the embodiment of the present invention, a wheel type hydraulic excavator will be described with reference to FIGS. 1 to 6.

FIG. 1 is a perspective view showing the appearance of the hydraulic excavator 1 according to the embodiment of the present invention. FIG. 2 is a perspective view showing the lower traveling body 2. FIG. 3 is a perspective view showing the filter accommodating case 6 attached to the elevating device 5R and the inside thereof. FIG. 4 is an enlarged view of the filter accommodating case 6 and its surroundings. FIG. 5 shows the mounting structure of the filter accommodating case 6, and is a view showing the lower traveling body 2 in the direction of looking up from below. FIG. 6 is a diagram showing a state in which the filter accommodating case 6 is arranged at the working position.

As shown in FIG. 1, the hydraulic excavator 1 includes a lower traveling body 2 for traveling on a road surface and an upper rotating body 3 provided above the lower traveling body 2 so as to be swivelable via a swivel device. ing.

As shown in FIG. 2, the lower traveling body 2 includes a chassis frame 20, a pair of left and right front wheels 21L, 21R, rear wheels 22L, 22R, and blades for soil removal work attached to the rear end of the chassis frame 20. It is configured to include the device 23. The hydraulic excavator 1 is a wheel-type hydraulic excavator, and travels by transmitting the driving force of a traveling motor to a pair of left and right front wheels 21L and 21R and rear wheels 22L and 22R via a propeller shaft and an axle to rotate the excavator 1.

As shown in FIG. 1, the upper swivel body 3 includes a swivel frame 30, a driver's cab 31 on which an operator is boarded, a counter weight 32 for maintaining a balance so that the vehicle body does not tilt, and various types of engines, controllers, and the like. It includes a machine room 33 in which equipment is housed, and a utility room 34 in which tools for maintenance work such as a fuel tank for storing fuel are housed.

The driver's cab 31 is located on the front left side of the swivel frame 30, the utility chamber 34 is located on the front right side of the swivel frame 30, and the counterweight 32 is located on the rear side of the swivel frame 30. The machine room 33 is arranged between the driver's cab 31, the utility room 34, and the counterweight 32. Of the vehicle width direction (left-right direction) of the hydraulic excavator 1, the left-hand side of the operator seated in the driver's seat (not shown) provided in the driver's cab 31 is the "left direction", and the right-hand side is the "right direction". And.

Further, a front working machine 4 for excavating earth and sand is attached between the front central portion of the swivel frame 30, that is, between the driver's cab 31 and the utility chamber 34. The front working machine 4 includes a boom 41 rotatably attached to the swivel frame 30, a boom cylinder 410 connecting the swivel frame 30 and the boom 41, and an arm rotatably attached to the tip of the boom 41. 42, an arm cylinder 420 connecting the boom 41 and the arm 42, a bucket 43 rotatably attached to the tip of the arm 42, a bucket cylinder 430 connecting the arm 42 and the bucket 43, and these. It has a plurality of pipes 44 for guiding hydraulic oil to each cylinder 410, 420, 430.

The boom 41 is driven by the boom cylinder 410 expanding and contracting the rod, and rotates (up and down) in the vertical direction with respect to the upper swing body 3. The arm 42 is driven by the arm cylinder 420 expanding and contracting the rod, and rotates in the front-rear direction with respect to the boom 41. The bucket 43 is driven by the bucket cylinder 430 expanding and contracting the rod, and rotates in the front-rear direction with respect to the arm 42.

The bucket 43 scoops up a load of earth and sand and unloads it at a predetermined position. For example, the bucket 43 may be changed to an attachment such as a grapple for grasping wood, rock, waste, or a breaker for excavating rock. Is also possible. As a result, the hydraulic excavator 1 can perform various operations including excavation and crushing by using an attachment suitable for the work content.

As shown in FIG. 2, the hydraulic excavator 1 includes a pair of elevating devices 5L and 5R between the front wheels 21L and 21R and the rear wheels 22L and 22R on the side of the lower traveling body 2 in the vehicle width direction. .. The pair of elevating devices 5L and 5R are used when the operator gets on the driver's cab 31 and when the worker performs maintenance work on the vehicle body.

The pair of elevating devices 5L and 5R are front side connecting portions that connect the first to third elevating steps 51 to 53 and the first to third elevating steps 51 to 53 arranged at intervals in the vertical direction on the front side, respectively. It has a 54A and a rear connecting portion 54B that connects the first to third elevating steps 51 to 53 on the rear side. In the present embodiment, the pair of elevating devices 5L and 5R each have three elevating steps 51 to 53, but the number of steps of the elevating step is not particularly limited.

In the following description, of the pair of elevating devices 5L and 5R, the elevating device arranged on the right side of the lower traveling body 2 is referred to as "right elevating device 5R", and the elevating device arranged on the left side of the lower traveling body 2 is defined as "right side elevating device 5R". Is referred to as "left side lifting device 5L".

As shown in FIGS. 1, 2, and 4, a filter accommodating case 6 formed in a rectangular parallelepiped shape elongated in the front-rear direction of the vehicle body is attached to the right-side elevating device 5R. Specifically, as shown in FIG. 5, the filter accommodating case 6 is bolted to the first to third elevating steps 51 to 53 between the chassis frame 20 and the first to third elevating steps 51 to 53. It is fastened with (not shown) and is connected to the rear connecting portion 54B by a connecting member 610 extending from the rear end portion 61B.

Further, the filter accommodating case 6 is attached to the chassis frame 20 on the front side and the rear side. As shown in FIG. 5, the chassis frame 20 extends outward from the right edge surface (sides of the first to third elevating steps 51 to 53), and a pair of extensions arranged in the front-rear direction of the lower traveling body 2. It has protrusions 200A and 200B (front extension 200A and rear extension 200B). A locked member 810 to which the latch 81 provided on the connecting member 610 is locked is fixed to the rear extending portion 200B.

The filter accommodating case 6 is attached to the front extending portion 200A via the hinge 82 at the front end portion 61A, and is detachably attached to the locked member 810 via the latch 81. The hinge 82 has a shaft portion 820 along the vertical direction of the lower traveling body 2, a first fixing portion 821 fixed to the front end portion 61A of the filter accommodating case 6, and a second fixing portion fixed to the front extending portion 200A. It has a part 822 and.

When the locked latch 81 is released, as shown in FIG. 6, the filter accommodating case 6 attached to the right elevating device 5R rotates horizontally around the shaft portion 820 of the hinge 82, and the lower traveling body 2 It moves from the position between the front wheel 21R and the rear wheel 22R on the right side of the vehicle to a position rotated 90 ° toward the outside front.

As shown in FIG. 3, the filter accommodating case 6 has a main body 61 having an open upper portion and a lid 62 attached to the upper portion of the main body 61 via a hinge so as to be openable and closable in the vertical direction. Inside the main body 61, a part of the equipment constituting the fuel supply device for supplying fuel to the fuel tank housed in the utility chamber 34 is housed.

The fuel supply device includes a fuel pump that sucks fuel from an external tank in which fuel to be supplied to the fuel tank is stored and discharges the fuel toward the fuel tank, a filter 71 for purifying the fuel, and a fuel pump and a filter 71. It has a connecting hose 72 for connecting and a connecting hose 73 for connecting the external tank and the filter 71.

In the present embodiment, among these devices, the filter 71, the connecting hose 72, and the connecting hose 73 are housed inside the main body 61 of the filter housing case 6. In the present embodiment, the connecting hose 72 and the connecting hose 73 are each housed inside the main body 61 with one end fixed in advance to the filter 71. The fuel pump is housed in the utility chamber 34.

If the filter 71 is housed in the utility chamber 34 together with the fuel pump, it is difficult to secure the space required for arranging the filter 71, so the size of the filter 71 must be reduced. However, for example, when inferior fuel is used, there may be a problem that purification is insufficient.

However, in the present embodiment, since the filter 71 is housed in the filter housing case 6, it is possible to secure a space of an area required for arranging the filter 71. As a result, for example, even when inferior fuel is used, the filter 71 having a size required for purifying the fuel can be mounted on the hydraulic excavator 1.

When supplying fuel to the fuel tank, the worker first releases the locked latch 81 and hinges the right lifting device 5R from the right side position of the lower traveling body 2 toward the outside front. Rotate 90 ° around the shaft portion 820 of 82.

As a result, as shown in FIG. 6, the filter accommodating case 6 attached to the right-side elevating device 5R is located on the right side of the lower traveling body 2 and is included in the vehicle width within the range of the vehicle width. Move to a work position that is outside the range of the vehicle width. The hinge 82 is an aspect of a moving mechanism that moves the filter accommodating case 6 between the storage position and the working position.

Next, the worker opens the lid 62 of the filter housing case 6 upward, connects the connecting hose 72 housed in the main body 61 to the fuel pump housed in the utility chamber 34, and connects the connecting hose 73 to the outside. Connect to the tank. Then, by operating the fuel pump, the fuel stored in the external tank is sucked up and discharged to the fuel tank, and the fuel is supplied to the fuel tank.

In this way, since the filter accommodating case 6 can be moved from the retracted position to the working position, the worker can supply fuel while standing on the ground in a wide place outside the vehicle body in the vehicle width direction. It can be carried out. As a result, the worker can perform the fuel supply work in a stable posture, which facilitates the work. Further, since the lid 62 of the filter accommodating case 6 opens upward, the worker can access the inside of the filter accommodating case 6 from above, and the work can be performed while standing on the ground. Sex improves.

Further, although the filter 71 needs to be replaced regularly, it is housed in the filter housing case 6 at a position relatively close to the ground, not inside the upper swivel body 3 at a high position from the ground. , The filter can be easily replaced as compared with the case where the upper swing body 3 is housed inside.

Further, the utility chamber 34 is provided on the side where the filter accommodating case 6 is arranged (on the right side of the upper swing body 3) in the vehicle width direction, and all the devices constituting the fuel supply device are gathered on the right side of the vehicle body. Have been placed. This improves the efficiency of the fuel supply work.

Further, in the present embodiment, the filter accommodating case 6 is attached to the right elevating device 5R, and when the filter accommodating case 6 is moved from the storage position to the working position, the right elevating device 5R also moves, so that the filter accommodating the filter. The problem that the right side lifting device 5R becomes an obstacle when moving the case 6 is solved.

Further, in the present embodiment, since one end of each of the connecting hose 72 and the connecting hose 73 is fixed to the filter 71 in advance, the connecting hose 72 and the filter 71 are connected each time the fuel is supplied. It is not necessary to perform the work and the work of connecting the connection hose 73 and the filter 71, and the work efficiency is improved.

The embodiments of the present invention have been described above. The present invention is not limited to the above-described embodiment, and includes various modifications. For example, the above-described embodiment has been described in detail in order to explain the present invention in an easy-to-understand manner, and is not necessarily limited to the one including all the described configurations. Further, it is possible to replace a part of the configuration of the present embodiment with the configuration of another embodiment, and it is also possible to add the configuration of another embodiment to the configuration of the present embodiment. Furthermore, it is possible to add / delete / replace a part of the configuration of the present embodiment with another configuration.

For example, in the above embodiment, in the upper swing body 3, the driver's cab 31 is arranged on the left side and the utility room 34 is arranged on the right side of the front working machine 4, but the present invention is not limited to this. The positional relationship between the 31 and the utility room 34 in the vehicle width direction may be opposite to each other. Unlike the present embodiment, when the utility chamber 34 is arranged on the left side of the front portion of the swivel frame 30, it is preferable that the filter accommodating case 6 is also attached to the left side of the lower traveling body 2.

Further, in the above embodiment, the hydraulic excavator 1 is a wheel type hydraulic excavator having a pair of front wheels 21L, 21R and rear wheels 22L, 22R, but it does not necessarily have to be a wheel type, and a crawler type hydraulic excavator. It may be.

Further, in the above embodiment, the filter accommodating case 6 is attached to the chassis frame 20 via the hinge 82 at the front end portion 61A, but the present invention is not limited to this, and the chassis frame is not limited to this, for example, at the rear end portion 61B via the hinge 82. It may be attached to 20. That is, the filter accommodating case 6 may be attached to the chassis frame 20 so as to be openable via the hinge 82.

Further, in the above embodiment, the hinge 82 is used as one aspect of the moving mechanism, but the present invention is not limited to this, and the filter accommodating case 6 is pulled out from the storage position to the working position by using, for example, a rail or the like as the moving mechanism. You may move it.

Further, in the above embodiment, the filter accommodating case 6 is attached to the chassis frame 20 by the latch 81, but the present invention is not limited to this, and the filter accommodating case 6 may be attached to the chassis frame 20 by, for example, bolts.

Further, in the above embodiment, since the filter accommodating case 6 is attached to the first to third elevating steps 51 to 53, the elevating device 5R is also moved from the retracted position to the working position together with the filter accommodating case 6, but at least the filter accommodating. Only the case 6 needs to move from the storage position to the working position.

1: Hydraulic excavator (construction machinery)
2: Lower traveling body 3: Upper swivel body 6: Filter accommodating cases 51 to 53: 1st to 3rd elevating steps (plural elevating steps)
61: Main body 62: Cover 71: Filter 72: Connecting hose 73: Connecting hose 82: Hinge (moving mechanism)
820: Shaft

Claims (4)

A lower traveling body provided with a chassis frame and a pair of left and right front and rear wheels,
An upper swivel body provided so as to be swivel above the lower traveling body and
A fuel supply device having a filter for purifying the fuel supplied to the fuel tank arranged in the upper swing body, and
In a construction machine provided with an elevating step provided between the front wheel and the rear wheel on the side of the lower traveling body.
Wherein provided between the elevating step and said chassis frame in the side of the undercarriage, the filter having a body which houses the filter therein, and a lid mounted openably on the upper portion of the body Storage case and
Said filter housing case, together with the lifting step, the range to become the working position of the vehicle width of the storage position and the previous SL undercarriage to be included within the scope of the even the person side vehicle width of the lower traveling body A construction machine characterized by having a moving mechanism that moves between them. In the construction machine according to claim 1,
The filter accommodating case is attached to the chassis frame of the lower traveling body via a hinge having a shaft portion along the vertical direction of the lower traveling body.
The moving mechanism is a construction machine characterized by being the hinge that rotates the filter accommodating case in the horizontal direction around the shaft portion. In the construction machine according to claim 1,
Inside the main body, a connecting hose for connecting a fuel pump that discharges fuel to the fuel tank and the filter, an external tank in which fuel supplied to the fuel tank is stored, and the filter are connected. A construction machine characterized in that it is further housed with a connecting hose for the purpose of fuel pumping. In the construction machine according to claim 3,
A construction machine characterized in that each of the connecting hose and the connecting hose is housed inside the main body in a state where one end is fixed in advance to the filter.

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