JP4007217B2 - Work machine - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a working machine such as a hydraulic excavator equipped with a fuel tank and a battery.
[0002]
[Prior art]
The conventional technology and its problems will be described using a hydraulic excavator as an example.
[0003]
FIG. 6 shows a small hydraulic excavator called a mini excavator. In this hydraulic excavator, an upper swing body 2 is mounted on a crawler type lower traveling body 1 so as to be rotatable about a vertical axis, and a boom 3, an arm 4, a bucket 5 and a boom for driving them are mounted on the upper swing body 2. The working device A comprising the cylinders 6, 7, and 8 for the arms and buckets is mounted.
[0004]
The upper swing body 2 is configured by attaching an engine 10 and various devices and covers (exterior body) covering these to the upper frame (swivel board) 9, a driver's seat 11, a canopy 12, and the like. Reference numeral 13 denotes a canopy front column that supports the canopy 12, reference numeral 14 denotes a left column, and reference numeral 15 denotes a right column.
[0005]
FIG. 7 shows the configuration of the upper frame 9 and the device arrangement with respect to the frame 9.
[0006]
In this figure, reference numeral 16 denotes a bottom plate of the upper frame 9 on the left and right sides of the bottom plate 16 (both left and right when viewed on the driver's seat 11; the same applies to the left and right and front and rear directions below). Main frames (sometimes referred to as vertical ribs) 17 and 18 extending in the front-rear direction, and a partition wall 19 extending in the left-right direction across the main frames 17 and 18 are provided. Drive units such as the engine 10, the fan 20, the radiator 21, and the oil cooler 22 are installed in the rear portion (engine room) of the upper frame.
[0007]
On the other hand, a hydraulic oil tank 23 and a battery 24 are provided on the front right side of the partition wall 19.
[0008]
A tank mounting portion 25 is defined on the left front side by the left main frame 17 and the partition wall 19, and a fuel tank 26 for storing fuel supplied to the engine 10 is installed in the tank mounting portion 25.
[0009]
Since the fuel tank 26 needs to be periodically cleaned, the fuel tank 26 is attached to the tank mounting portion 25 so as to be detachable and horizontally removable from the left side.
[0010]
The battery 24 is also attached under the condition that it is detachable and can be taken in and out from the side because it requires daily inspection, and further, it can be easily maintained from the side.
[0011]
Conventionally, the fuel tank 26 is attached to the tank attachment portion 25 by a bracket 27 and a tightening band 28 bolted to the bracket 27 as shown (see, for example, Patent Document 1).
[0012]
[Patent Document 1]
Japanese Patent Laid-Open No. 2001-90112
[Problems to be solved by the invention]
However, according to the known technology, as described above, since the fuel tank 26 and the battery, which are taken in and out from the side, are attached to different positions by separate attachment means, the cost of parts for these attachments increases. There was a problem.
[0014]
In particular, the fuel tank 26 is large and heavy and has a large number of parts, such as the bracket 27 enclosing a substantially half-circumferential portion of the tank 26 and fixing with the fastening band 28 as described above. Since many structures are employed, the cost is further increased, and the entire mounting structure is larger and heavier, which is disadvantageous for a small excavator as shown in the drawing.
[0015]
Therefore, the present invention provides a working machine that can simplify, reduce the size and weight of a mounting structure for a fuel tank and a battery, and realize cost reduction.
[0016]
[Means for Solving the Problems]
According to the first aspect of the present invention, an upper frame of the upper revolving structure constituting the machine body is provided with a main frame extending in the front-rear direction and a partition wall extending in the left-right direction, and the tank / partition partitioned by the main frame and the partition wall in install them work machine so as to out from the side of the fuel tank and the battery to the battery mounting portion, the fuel tank, in the above mainframe movement of the take-out direction opposite to the direction, rearward movement by the partition walls is to establish a state which is blocked respectively, set up a battery in the tank battery mounting unit in the tank side so as to prevent movement of the take-out direction of the fuel tank, for attaching the battery to the tank battery mounting portion a bracket which, provided with a tank support portion to prevent forward movement and the upward movement of the fuel tank A.
[0017]
A second aspect of the present invention, in the configuration of claim 1 is intended to bracket, digits set the tank receiving portion for preventing movement of the take-out direction of the fuel tank.
[0018]
The invention of claim 3 is the structure of claim 2, and a tank receiving portion, digits set in a state interposed between the surfaces facing each of the fuel tank and a battery serving as a partition separating the two.
[0019]
According to a fourth aspect of the present invention, in the configuration according to any one of the first to third aspects, the fuel tank is formed in an L shape that is bent outward at one end side, and the battery is disposed in a space inside the bent portion of the fuel tank. It is a thing.
[0020]
According to the above configuration , the battery serves as a fuel tank retaining means, and the main frame and the partition wall originally provided on the upper frame, and the battery mounting bracket prevent the fuel tank from moving in all remaining directions. Therefore, a dedicated tank movement prevention means is not required. For this reason, the tank mounting structure can be simplified, reduced in size, reduced in weight, the cost can be reduced , and the stability of the tank mounting state can be increased .
[0021]
Moreover, since the battery with high maintenance frequency, such as inspection and battery liquid replenishment, is disposed outside, it is convenient for battery maintenance.
[0022]
Further, according to the configuration of claim 3, since the tank and the battery are isolated by the tank receiving portion of the bracket, the adverse effect of arranging them adjacent to each other (for example, fuel or water is transmitted from the tank to the battery, or battery heat is Mutual influences such as transmission to the fuel tank can be prevented.
[0023]
According to the fourth aspect, the battery-, for placement inside space of the bend of the tank, it is possible to reduce the occupied space therebetween while taking a large tank volume to the maximum.
[0024]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment of the present invention will be described with reference to FIGS.
[0025]
In the following embodiments, the same parts as those shown in FIGS. 6 and 7 are denoted by the same reference numerals, and redundant description thereof is omitted.
[0026]
As shown in FIG. 1, a tank / battery mounting portion (hereinafter referred to as a tank mounting portion) 31 is defined by a left main frame 17 and a partition wall 19 on the left side of the front portion of the upper frame 9. A tank 32 and a battery 33 are inserted into the tank mounting portion 31 from the left side (lower side of the figure) as shown by the double-line arrows in FIG. It is taken out.
[0027]
The tank 32 is made of plastic (which may be made of metal) and is formed in an L shape with a rear portion bent to the left as shown.
[0028]
In the tank mounting structure, means for regulating the tank 32 in each horizontal direction other than the take-out direction and in the vertical direction is configured as follows.
[0029]
In the left main frame 17, front and rear convex portions 34 and 35 are provided on both front and rear sides of the surface facing the tank 32 in the tank mounting state.
[0030]
Further, a canopy column base 37 to which the canopy left column 14 shown in FIG. 6 is mounted is provided on the left rear side of the tank mounting unit 31, and a left side mounting unit 36 is provided on the front surface of the canopy column column 37.
[0031]
As shown in FIGS. 2, 3, and 5, each of these convex portions 34, 35, and 36 is formed by fixing an angle member to the left main frame 17 and the canopy post base 35 by welding or the like.
[0032]
On the other hand, in the tank 32, the front and rear concave portions 38 and 39 are formed in portions corresponding to the front and rear convex portions 34 and 35 (front and rear sides of the right side wall) in a state where the tank 32 is set in the tank mounting portion 31. Is provided.
[0033]
Further, an outwardly protruding bulging portion 40 is provided on the left side of the rear surface of the tank 32, and the left convex portion 36 is engaged with the upper surface side of the bulging portion 40 in the tank set state as shown in FIG. It is configured.
[0034]
Here, the front concave portion 38 is opened to the right and the front, the rear concave portion 39 is opened to the right and the rear, and the bulging portion 40 is positioned below the left convex portion 36 as described above. It is provided in the state to do.
[0035]
Accordingly, the tank-side recesses 38 and 39 and the bulging portion 40 and the machine-body-side projections 34, 35 and 36 are automatically inserted by simply inserting the tank 32 horizontally into the tank mounting portion 31 from the left side. Engage. FIG. 5 shows the engagement state of the rear convex portion 35 and the rear concave portion 39.
[0036]
By these three engagements, the movement of the tank 32 in the horizontal direction other than the front, rear and right sides, that is, the tank removal direction is stopped.
[0037]
Further, in each engaging portion, the convex portions 34, 35, 36 are engaged with the concave portions 38, 39 and the bulging portion 40 in a state where they are pressed from above (see FIG. 5). Directional movement is stopped.
[0038]
Accordingly, the tank 32 is completely attached by preventing the tank 32 from being pulled out to the left in this state.
[0039]
The tank retaining means and the battery mounting structure will be described next.
[0040]
The battery 33 is disposed adjacent to the tank 32 in a space formed on the left side (outside) of the tank 32 and inside the curve of the tank 32 in the tank mounting portion 31. Is attached in a state where movement in the take-out direction is stopped (prevented from being detached) by the bracket 41 for battery attachment.
[0041]
As shown in FIG. 2 and the like, the bracket 41 has a side plate 42 that also serves as a tank receiving portion that contacts the right side surface of the battery 33 and a back plate 43 that contacts the rear surface. Screwed onto the part 31.
[0042]
The battery 33 has a frame or bar and bolts and nuts (both of which are well known to the bracket 41 in a state where the right side is constrained by the side plate 42 of the bracket 41 and the back is constrained by the back plate 43, respectively. (Not shown).
[0043]
In this state, as shown in FIGS. 3 and 4, the side plate 42 and the back plate 43 of the bracket 41 are in contact with the tank 32, and the side plate 42 prevents the tank 32 from moving to the left side (withdrawal). 43 prevents the tank 32 from moving forward.
[0044]
Further, the bracket 41 is provided with a front tank support portion 45 that is perpendicular to the front end and a horizontal upper tank support portion 46 that is above the upper end. The front tank support portion 45 prevents forward movement of the tank 32 and The tank 32 is pressed from above by the support portion 46.
[0045]
As a result, the tank 32 can be stably attached to the attachment portion 31 such as the tank in a state in which the movement in the entire horizontal direction including the vertical direction and the take-out direction is stopped several times.
[0046]
In addition, when cleaning the tank 32, the battery 32 and the bracket 41 can be easily removed by removing the battery 32 and the bracket 41 from the attachment portion 31 such as the tank because the tank 32 becomes free in the removal direction.
[0047]
According to this configuration, since the battery 33 (battery mounting bracket 41) also serves as a fuel tank retaining means, a dedicated tank retaining means is not required. For this reason, the tank mounting structure can be simplified and miniaturized, and the cost can be reduced.
[0048]
Further, since the side plate 42 of the bracket 41 is interposed between the tank 32 and the battery 33 and isolates them, a mutual influence (for example, fuel or water adhering to the fuel) is a harmful effect of arranging both of them adjacent to each other. Transmission to the battery or transmission of battery heat to the fuel tank).
[0049]
Furthermore, since the bracket 41 (the side plate 42, the back plate 43, the front side and the upper tank support portions 45, 46) is also used as a member for restricting the movement in the direction other than the take-out direction of the tank 32 as described above, the tank mounting structure is provided. It can be further simplified, reduced in size and weight, and the stability of the tank mounting state can be enhanced.
[0050]
In addition, since the tank 32 is formed in an L shape and the battery 33 is arranged in a space that can be formed inside the bend, both of them should be installed compactly with the smallest occupied space while maximizing the tank capacity. Can do.
[0051]
Meanwhile, the front and to the entire bracket 41 includes an upper tank support portion 45,4 6 can prevent the movement in each direction of the tank 32, the tank mounting dedicated structure (protrusion 34 to 36 and the recessed portion of the battery-mounting bracket 41 38, 39 or the bulging portion 40) may be omitted.
[0052]
Further, the battery mounting bracket may have a structure unrelated to the tank 32 being prevented from being detached, and the battery 33 may be directly retained by the battery 33.
[0053]
On the other hand, the tank 32 may be formed in an outward concave shape, and the battery 33 may be disposed in the concave portion.
[0054]
Furthermore, the present invention is suitable for a hydraulic excavator (particularly, a small excavator), but can be widely applied to a trench excavator or other work machine having the excavator as a base.
[0055]
【The invention's effect】
As described above, according to the present invention, the battery also serves as a fuel tank retaining means, and the main frame and the partition wall originally provided in the upper frame, and the battery mounting bracket move the fuel tank in all remaining directions. Since it also serves as a blocking means, a dedicated tank movement blocking means becomes unnecessary. For this reason, the tank mounting structure can be simplified, reduced in size, reduced in weight, the cost can be reduced , and the stability of the tank mounting state can be increased .
[0056]
According to the invention of claim 3, since the tank and the battery are isolated by the tank receiving portion of the bracket, it is possible to prevent the adverse effect of arranging them adjacent to each other.
[0057]
According to the invention of claim 4, the battery and from the placed inside the space of the bending of the tank, it is possible to reduce the occupied space therebetween while taking a large tank volume to the maximum.
[Brief description of the drawings]
FIG. 1 is a schematic plan view of an entire upper frame showing a basic embodiment of the present invention.
FIG. 2 is an exploded perspective view of a mounting portion of a fuel tank and a battery in the same embodiment.
FIG. 3 is a perspective view of the tank and battery attached.
FIG. 4 is a plan view of the same.
FIG. 5 is an enlarged cross-sectional view taken along line VV in FIG. 4;
FIG. 6 is a schematic side view of a hydraulic excavator to which the present invention is applied.
FIG. 7 is a schematic plan view of the entire upper frame including a conventional fuel tank and battery mounting portion.
[Explanation of symbols]
2 Upper swing body constituting the machine body 9 Upper frame of upper swing body 16 Bottom plate of upper frame 31 Tank / battery mounting portion 32 Fuel tank 33 Battery 41 Battery mounting bracket 42 Side plate of the bracket (as tank retaining means) Tank receiver)
43 Back plate as tank support section 45 Front tank support section 46 Upper tank support section

Claims (4)

A main frame extending in the front-rear direction and a partition wall extending in the left-right direction are provided on the upper frame of the upper swing body constituting the machine body, and fuel is supplied to the tank / battery mounting part partitioned by the main frame and the partition wall. installing the tank and the battery in the install them work machine so as to out from the side, the fuel tank, with the movement of the take-out direction opposite to the direction the main frame, with the backward movement is blocked respectively by the partition walls In addition, the battery is installed on the tank / battery mounting part on the side of the tank so as to prevent movement of the fuel tank in the take-off direction, and the bracket for mounting the battery on the tank / battery mounting part is attached to the fuel tank. working machine, characterized in that a tank support portion to prevent forward movement and upward movement . A bracket, working machine according to claim 1, wherein the tank receiving portion for preventing movement of the take-out direction of the fuel tank digits set. The tank receiving portion, the working machine according to claim 2, wherein the digits set in a state to be interposed partition wall separating both between the faces facing each of the fuel tank and the battery. The fuel tank is formed in an L shape bent outward at one end side, and a battery is arranged in a space inside the curve of the fuel tank, according to any one of claims 1 to 3 . Work machine.

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