JP5260465B2 - Construction machinery - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To secure durability of a side panel body. <P>SOLUTION: A hydraulic shovel 2 includes: a frame body 22, a fuel tank 30 mounted on the frame body 22; and the side panel body 20 mounted on the frame body 22 to cover a side surface 30a of the fuel tank 30 with an elastic body 40 abutting on the side surface 30a. The surface on the opposite side to the side surface 30a of the fuel tank 30 in a projecting piece 40b of the side panel body 20 is located in contact with or opposite with a space to a vertical surface 26a of the frame body 22. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

The present invention relates to a construction machine such as a hydraulic excavator, and more specifically, a frame body, a structure such as a fuel tank mounted on the frame body, an elastic body fixed inside, and the elastic body on the side surface of the structure. The present invention relates to a construction machine including a side panel body mounted on a frame body so as to be in contact with and cover the side surface.

A construction machine, such as a hydraulic excavator, includes a lower traveling body and an upper revolving body that is rotatably disposed on the lower traveling body. The upper swing body includes a frame body, and a cab, an engine room, a counterweight, a work machine, and the like are provided on the frame body. Structures such as a fuel tank and a hydraulic oil tank are also mounted on the frame body of the upper swing body. And the side surface of these structures, for example, a hydraulic oil tank, is covered with the side panel body (hydraulic oil tank side panel) attached to the upper turning body (for example, refer to patent documents 1).

By the way, it is desirable that vibrations of structures such as a fuel tank and a hydraulic oil tank supported on the frame body of the upper swing body be absorbed as much as possible. For this reason, an elastic body made of, for example, polyurethane rubber is fixed to the inside of the side panel body, and the upper rotating body covers the side panel body to cover the side surface of the fuel tank in a state where the elastic body is in contact with the side surface of the fuel tank. Construction machines installed in the plant have already been developed.

JP 2000-192505 A

In the construction machine, the vibration of the fuel tank is absorbed by the elastic body, and the rigidity of the side panel body is ensured by providing unevenness on the side panel body. However, for layout or design reasons, if the side panel body is large in area and formed entirely flat, there is a risk that it will not be able to withstand vibration due to insufficient rigidity, and the required durability cannot be ensured. There is. In order to solve this problem, it is conceivable to provide a plurality of reinforcing members inside the side panel body, but the configuration becomes complicated, resulting in an increase in weight and cost.

An object of the present invention is to provide a novel construction machine that can ensure the durability of a side panel body with a remarkably simple and lightweight construction and at low cost.

According to the present invention, the frame body, the structure mounted on the frame body, the elastic body is fixed inside, and the elastic body is brought into contact with the side surface of the structure so as to cover the side surface. In the construction machine provided with the side panel body mounted on the side panel body, the side panel body is provided with a projecting piece extending downward from the lower end surface, and the frame body has a position corresponding to the projecting piece at the position of the structure. A vertical surface directed toward the side surface is provided, and the surface of the projecting piece of the side panel body, which is opposite to the side surface of the structure, is positioned so as to be in contact with the vertical surface of the frame body or with a gap therebetween. A construction machine is provided.
The side panel body includes a lower flange that extends perpendicularly from the lower end in the side surface direction of the structure and extends linearly along the lower end. The lower surface of the lower flange constitutes the lower end surface of the side panel body, and The piece is preferably arranged to extend vertically downward from the lower flange.
It is preferable that the frame body includes a side frame extending linearly outward from the side surface of the structure, and the vertical surface is constituted by one side surface of the side frame of the side frame.
At least one elastic member is disposed on the lower flange of the side panel body so as to extend downward from the lower surface, and an elastic seal member is attached to the lower surface of the lower flange. The side panel body includes the elastic member and the elastic member. It is preferable to be placed on the upper surface of the side frame via a seal member.
The frame body includes an auxiliary frame, and the auxiliary frame includes a vertical surface that is opposed to the vertical surface of the side frame with a gap, and the projecting piece disposed on the lower flange of the side panel body is in the gap. It is preferable to be detachable from above.
The elastic body is preferably configured integrally by stacking a plurality of elastic bodies having different hardnesses.
It is preferable that the elastic body with high hardness is arranged on the side panel body side and the elastic body with low hardness is arranged on the structure side.
The elastic body is integrally formed by fixing the first elastic body with high hardness and the second elastic body with low hardness, and the first elastic body is fixed inside the side panel body, It is preferable that the second elastic body is brought into contact with the side surface of the structure.

According to the construction machine according to the present invention, it is possible to ensure the durability of the side panel body with a remarkably simple and lightweight configuration and at low cost.

It is sectional drawing which shows the mounting part of the side panel body of the construction machine comprised according to this invention. It is a top view which abbreviate | omits one part of FIG. 1, and shows a part in cross section. It is a perspective view of the side panel body shown in FIG. It is the A section enlarged view of FIG. It is a B arrow view of FIG. It is a perspective view showing the whole construction machine constituted according to the present invention.

Embodiments of a construction machine configured according to the present invention will be described below in detail with reference to the accompanying drawings.

First, the overall configuration of a hydraulic excavator 100, which is a construction machine configured according to the present invention, will be described with reference to FIG.

The hydraulic excavator indicated as a whole by the number 2 includes a lower traveling body 4 and an upper revolving body 6 disposed on the lower traveling body 4 so as to be rotatable. The upper swing body 6 includes an operation room 8, an engine room 10, a counterweight 12, a structure accommodation room, in the embodiment, a fuel tank accommodation room 14, a work machine 16, and the like. The fuel tank housing chamber 14 includes a side panel body 20 that includes the features of the present invention.

With reference to FIGS. 1 to 3, the upper swing body 6 includes a frame body 22. The frame body 22 includes a substrate 24 and side frames 26 fixed to upper surfaces on both sides of the substrate 24. The side frame 26 shown only in one side in FIG.1 and FIG.2 is comprised from the hollow square steel pipe in embodiment, and is equipped with the one side surface 26a which is a vertical surface, the other side surface 26b, the upper surface 26c, and the lower surface 26d. The side frame 26 linearly extending in the front-rear direction (forward / reverse direction) of the hydraulic excavator 2 in a state where the upper swing body 6 is positioned at the reference position where the upper swing body 6 is not turned has a lower surface 26 d placed on the upper surface of the substrate 24. It is fixed in a state. An auxiliary frame 28 is fixed on the substrate 24 at a position corresponding to the fuel tank housing chamber 14 (FIG. 6) of the frame body 22. The auxiliary frame 28 includes a flat top plate portion 28a and side plate portions 28b extending downward from both sides of the top plate portion 28a by the same length, and the lower end of the side plate portion 28b is brought into contact with and firmly fixed to the upper surface of the substrate 24. Has been.

On the top plate portion 28a of the auxiliary frame 28, a fuel tank 30 as a structure is detachably attached. That is, a pair of mounting flanges 32 are provided at the lower ends of the front and rear ends of the fuel tank 30 in the front-rear direction, and each of the mounting flanges 32 is placed on the top plate portion 28a of the auxiliary frame 28. It is attached to the auxiliary frame 28 by being fastened by the nut 34. One side surface 26 a of one side frame 26 forms a vertical surface directed toward the one side surface 30 a of the fuel tank 30. Further, the vertical surface 28 c outside the one side plate portion 28 b of the auxiliary frame 28 is positioned so as to face the one side surface 26 a that is the vertical surface of the one side frame 26 with a gap S therebetween.

As shown in FIG. 3, the side panel body 20 formed of a steel plate has a rectangular shape and a flat plate shape that are longer in the front-rear direction (lateral direction or longitudinal direction) than in the vertical direction (longitudinal direction). From the main body portion 20a, one end flange 20b and the other end flange 20c extending perpendicularly from the front and rear direction both ends of the main body portion 20a to the inner side surface direction (direction of one side surface 30a of the fuel tank 30), and the upper end and the lower end of the main body portion 20a Each has an upper flange 20d and a lower flange 20e extending perpendicularly to the inner side surface direction (the direction of one side surface 30a of the fuel tank 30). Two elastic bodies 40 in the embodiment are fixed to the inner side surface of the main body portion 20a at intervals in the front-rear direction so as to extend parallel to the vertical direction. The elastic body 40 is preferably configured integrally by stacking a plurality of elastic bodies having different hardnesses. In this configuration, it is preferable that the elastic body having high hardness is disposed on the side panel body 20 side, and the elastic body having low hardness is disposed on the structure side (in the embodiment, on the fuel tank 30 side). In the embodiment, each of the elastic bodies 40 is integrally configured by fixing a high hardness (hard) first elastic body 40a and a low hardness (soft) second elastic body 40b. . Each of the first elastic body 40a and the second elastic body 40b has an elongated rectangular shape with a rectangular cross section, and one side of each is polymerized and bonded. In each of the elastic bodies 40 configured in this manner, the other surface of the first elastic body 40a having high hardness is brought into contact with and adhered to the inner surface of the main body portion 20a. Each of the elastic bodies 40 (and hence the first elastic body 40a and the second elastic body 40b) is formed of an appropriate rubber member having elasticity capable of absorbing vibration, such as sponge rubber.

One end mounting flange 42, which is another steel plate member, is welded to the inner surface of the one end flange 20 b of the side panel body 20. The central portion of the one end mounting flange 42 extends outward from the inner surface of the one end flange 20b, and a plurality of (three in the embodiment) mounting holes 42a are formed at intervals in the vertical direction. Yes. Moreover, the other end attachment flange 44 which is another steel plate member is welded to the inner surface of the other end flange 20c of the side panel body 20. The distal end of the other end mounting flange 44 slightly extends outward from the distal end of the other end flange 20c, and a plurality of (in the embodiment, three) bent portions 45 are vertically spaced from the distal end. Is formed. Each of the rectangular bent portions 45 is bent so as to extend in a direction opposite to the one end flange 20b in parallel with the main body portion 20a from a position beyond the tip of the other end flange 20c. A mounting hole 45 a is formed in each of the bent portions 45.

The side panel body 20 is provided with a protruding piece 50b extending downward from the lower end surface (the lower surface of the lower flange 20e). More specifically, another steel plate member 50 is welded to the inner side surface of the lateral flange of the lower flange 20e of the side panel body 20 (the central portion between the one end flange 20b and the other end flange 20c). Yes. The steel plate member 50 includes a main body portion 50a that is polymerized and welded to the inner surface of the lower flange 20e, and a protruding piece 50b that extends downward at a right angle from a position at the front end of the main body portion 50a beyond the front end of the lower flange 20e. And. The projecting piece 50b has a rectangular shape and extends vertically downward from the lower flange 20e. The elastic body 40 described above is parallel to each other between the upper flange 20d and the lower flange 20e on the inner surface of the main body 20a at a position where the steel plate member 50 is sandwiched in the front-rear direction. And it arrange | positions so that it may extend in parallel with the one end flange 20b and the other end flange 20c (In embodiment, it arrange | positions in the position which divides between the one end flange 20b and the other end flange 20c in about 3 equal parts in a longitudinal direction. Have been).

4 and 5 together with FIG. 3, the lower flange 20e of the side panel body 20 is provided with at least one (in the embodiment, two) elastic members 60 extending downward from the lower surface. In addition, at least one (two in the embodiment) elastic seal member 65 is attached to the lower surface of the lower flange 20e. More specifically, the lower flange 20e of the side panel body 20 has at least one (two in the embodiment) through-holes 21 (FIG. 4) formed at both ends in the longitudinal direction. . In each of the through holes 21, an elastic member 60 made of synthetic rubber having appropriate elasticity is mounted so as to extend downward from the lower surface of the lower flange 20e. Each of the elastic members 60 having substantially the same shape and size includes a head portion 60a having a truncated cone shape, a cylindrical intermediate portion 60b, and a cylindrical bottom portion having a diameter larger than that of the intermediate portion 60b. 60c, each having a common axis. The diameter of the lower end of the head 60a is larger than the diameter of the intermediate part 60b. The inner diameter of each of the through holes 21 formed in the lower flange 20e is the same as or slightly larger than the diameter of the intermediate portion 60b of the elastic member 60. In each of the elastic members 60, the head 60a is forcibly inserted / penetrated from below into the corresponding through hole 21 of the lower flange 20e and positioned on the upper surface side, and the intermediate portion 60b is formed in the through hole 21. The bottom portion 60c is mounted so as to be positioned on the lower surface side of the lower flange 20e while being fitted.

Each of the elastic seal members 65 formed of an appropriate rubber member having elasticity capable of absorbing vibration has an elongated shape with a rectangular cross section, and one surface is bonded to the lower surface of the lower flange 20e. ing. One of the elastic seal members 65 is disposed so as to extend between the elastic member 60 disposed on the one end flange 20b side and the elastic body 40 disposed on the one end flange 20b side with respect to the steel plate member 50. Yes. The other of the elastic seal members 65 extends between the elastic member 60 disposed on the other end flange 20 c side and the elastic body 40 disposed on the other end flange 20 c side with respect to the steel plate member 50. Has been placed.

As shown in FIG. 2, on the upper surface of the base plate 24 of the frame body 22, outside the mounting flanges 32 of the fuel tank 30 and inside the one side frame 26, there is a support. Frames 70 and 72 are secured to stand upright from the top surface. The support frame 70 has a channel shape and is positioned so that the back surface of the bottom wall faces the front surface 30 b of the fuel tank 30. In the bottom wall of the support frame 70, three mounting holes (not shown) are formed corresponding to the three mounting holes 42a of the one end mounting flange 42 of the side panel body 20. On the other hand, the support frame 72 has a channel shape, and the back surface of the bottom wall is oriented in the same direction as the one side surface 30 a of the fuel tank 30. In the bottom wall of the support frame 72, three mounting holes (not shown) are formed corresponding to the three mounting holes 45a formed in each of the bent portions 45 of the other end mounting flange 44 in the side panel body 20. Has been.

The side panel body 20 is attached to the frame body 22 of the upper swing body 6 (FIG. 6) in the state described below. That is, with reference to FIG. 1 and FIG. 2, the surface of the protruding piece 50b of the steel plate member 50 attached to the lower flange 20e of the side panel body 20 is opposite to the one side 30a of the fuel tank 30 on one side. It is positioned so as to be in contact with one side surface 26a that is a vertical surface of the frame 26 or to face each other with a gap. In the embodiment, the projecting piece 50 b is formed in a gap S formed between the vertical surface 28 c outside the one side plate portion 28 b of the auxiliary frame 28 and the one side surface 26 a that is the vertical surface of the one side frame 26. It is inserted so that it can be removed.

Further, the lower surface of the bottom portion 60c and the lower surface of each of the elastic seal members 65 in each of the elastic members 60 attached to the lower flange 20e of the side panel body 20 are placed on the upper surface 26c of the side frame 26 and elastically supported. Is done. Further, the outer surface of the one end mounting flange 42 of the side panel body 20 is overlapped with the back surface of the bottom wall of the support frame 70, and each of the mounting holes 42 a (FIG. 3) of the one end mounting flange 42 is illustrated on the bottom wall of the support frame 70. It is aligned with the mounting holes that are not, and is fastened by bolts & nuts 74. On the other hand, the outer surface of each bent portion 45 of the other end mounting flange 44 of the side panel body 20 is overlapped with the back surface of the bottom wall of the support frame 72, and is formed on each bent portion 45 of the other end mounting flange 44. Each of the mounting holes 45 a (FIG. 3) is aligned with a mounting hole (not shown) on the bottom wall of the support frame 72 and fastened by a bolt and nut 76. The side panel body 20 is configured such that one side surface of each elastic body 40 (more specifically, the other surface of the second elastic body 40b having low hardness) is brought into contact with one side surface 30a of the fuel tank 30. It is mounted on the frame body 22 so as to cover the side surface 30a.

While the hydraulic excavator 2 is working or traveling, vibration is generated in the fuel tank 30, and this vibration is transmitted to the side panel body 20 through each of the elastic bodies 40. However, the surface of the projecting piece 50b of the side panel body 20 on the side opposite to the one side surface 30a of the fuel tank 30 is in contact with the one side surface 26a that is the vertical surface of the one side frame 26 or with a slight gap. Since they are positioned so as to face each other, the reaction force against the vibration transmitted from the fuel tank 30 is generated on the surface of the projecting piece 50b opposite to the side surface 30a of the fuel tank 30 and the vertical surface of one side frame 26. Since it is received between the certain side surface 26a, the vibration of the side panel body 20 is suppressed, and the required durability is ensured. The projecting piece 50b is formed in the gap S formed between the outer vertical surface 28c of the one side plate portion 28b of the auxiliary frame 28 and the one side surface 26a that is the vertical surface of the one side frame 26 without any gap. According to the configuration in which the gap is detachably inserted with a small gap, the above effect can be further improved. The gap is a slight gap that does not impair the achievement of the above-described effects. Also, the above configuration is practically useful because it is extremely simple, lightweight, and can be achieved at low cost.

The lower surface of the bottom portion 60c and the lower surface of each of the elastic seal members 65 in each of the elastic members 60 attached to the lower flange 20e of the side panel body 20 are placed on the upper surface 26c of the side frame 26 and elastically supported. The configuration suppresses vibration of the side panel body 20 and contributes to improvement of durability. The hardness of the elastic seal member 65 is set lower than the hardness of the elastic member 60, and the elastic member 60 also has a function of maintaining the installation position of the side panel body 20 in the height direction. In order to maintain this function, it is desirable to provide at least one elastic seal member 65 together with the elastic seal member 65. The small number of elastic seal members 65 suffices to reduce the number of through holes 21 (FIG. 4) to be processed in the lower flange 20 e of the side panel body 20, and the elastic seal members 65 are inserted into the through holes 21. As a result, the assembly work is reduced, which contributes to a reduction in manufacturing cost and an improvement in assembly workability. Moreover, since the lower surface of the lower flange 20e of the side panel body 20 is placed and supported on the upper surface 26c of the side frame 26 through the elastic seal member 65 over a wide range, stable support and excellent vibration absorption are ensured. This contributes to suppression of vibration of the side panel body 20 and improvement of durability.

The elastic body 40 is preferably configured integrally by stacking a plurality of elastic bodies having different hardnesses. In this configuration, it is preferable that the elastic body having high hardness is disposed on the side panel body 20 side, and the elastic body having low hardness is disposed on the structure side (in the embodiment, on the fuel tank 30 side). In the above-described embodiment, the elastic body 40 is integrally formed by fixing the first elastic body 40a having a high hardness and the second elastic body 40b having a low hardness, and the first elastic body 40a is a side. The second elastic body 40b is fixed to the inside of the panel body 20, and is configured to be brought into contact with one side surface 30a of the fuel tank 30 as a structure. Such a configuration contributes greatly to the improvement of durability because the slack can be sufficiently suppressed by adjusting the tension of the central region of the side panel body 20.

In the above embodiment, the structure is the fuel tank 30, but is not limited to this, and may be another structure such as a hydraulic oil tank. The side panel body 20 is a cover that does not normally open and close. Further, the side surface 30a side of the fuel tank 30 provided on the surface of the projecting piece 50b of the side panel body 20 opposite to the side surface 30a of the fuel tank 30 and the frame body 22 at a position corresponding to the projecting piece 50b. The vertical surface directed toward the surface, in the embodiment, one side surface 26a of the side frame 26, and the vertical surface 28c outside the one side plate portion 28b of the auxiliary frame 28 do not mean a geometrically accurate vertical surface. However, even if the surface is slightly inclined, it is included in the vertical surface as long as it can substantially achieve the above-described effects.

2: Excavator 6: Upper swing body 20: Side panel body
22: Frame body
26: Side frame 26a: One side surface (vertical surface)
30: Fuel tank 30a: One side surface 40 of fuel tank: Elastic body 40a: First elastic body 40b: Second elastic body 50b: Projection piece 60: Elastic member 65: Elastic seal member

Claims (6)

A frame body, a structure mounted on the frame body, and a side panel mounted on the frame body so that the elastic body is fixed inside and the elastic body is brought into contact with the side surface of the structure to cover the side surface In a construction machine with a body,
The side panel body is provided with a projecting piece extending downward from the lower end surface, and a vertical surface directed to the side surface of the structure is provided at a position corresponding to the projecting piece of the frame body. The surface of the projecting piece opposite to the side surface of the structure is positioned so as to contact the vertical surface of the frame body or to face each other with a gap therebetween.
Construction machinery characterized by that. The side panel body includes a lower flange that extends perpendicularly from the lower end in the side surface direction of the structure and extends linearly along the lower end. The lower surface of the lower flange constitutes the lower end surface of the side panel body, and The construction machine according to claim 1, wherein the piece is arranged to extend vertically downward from the lower flange. The frame body includes a side frame extending linearly outward from a side surface of the structure, and the vertical surface is configured from one side surface of the side frame of the structure. The construction machine according to claim 2. At least one elastic member is disposed on the lower flange of the side panel body so as to extend downward from the lower surface, and an elastic seal member is attached to the lower surface of the lower flange. The side panel body includes the elastic member and the elastic member. The construction machine according to claim 3, wherein the construction machine is placed on an upper surface of the side frame via a seal member. The frame body includes an auxiliary frame, and the auxiliary frame includes a vertical surface that is opposed to the vertical surface of the side frame with a gap, and the projecting piece disposed on the lower flange of the side panel body is in the gap. The construction machine according to claim 3 or 4, wherein the construction machine is removably inserted from above. The construction machine according to any one of claims 1 to 5, wherein the elastic body is integrally formed by stacking a plurality of elastic bodies having different hardnesses.

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