JP2010059704A - Operating fluid tank of construction machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce the number of components and cost. <P>SOLUTION: An operating fluid tank 2 of a wheel loader 100 is constituted to integrally form the mounting brackets BK for fastening the operating fluid tank 2 directly to support plates 122 of the wheel loader 100 by bolts 50 by projecting two parts of a first sheet metal 10 constituting a container body 40 forming a storage space of an operating fluid, outward from the container body 40. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

The present invention relates to a hydraulic oil tank fastened to a frame of a construction machine such as a wheel loader or a crawler loader by bolts.

In general, a hydraulic oil tank is attached to a construction machine such as a wheel loader equipped with an actuator using hydraulic pressure, such as a hydraulic motor or a hydraulic cylinder (see, for example, Patent Document 1). The hydraulic oil tank disclosed in Patent Document 1 is attached to a frame of an upper swing body of a hydraulic excavator.

Although not shown in Patent Document 1, when the hydraulic oil tank is assembled to the rear frame body of the wheel loader, for example, two mounting brackets having substantially the same configuration are used, although they are different from each other. It was assembled through. The mounting bracket includes a bottom plate made of a rectangular flat plate and an upright plate fixed to the bottom plate so as to stand upright from the upper surface of the bottom plate. A plurality of reinforcing plates for reinforcing the upright plate are also fixed between the bottom plate and the upright plate. Each of the mounting brackets configured as described above is superposed on the rear frame body of the wheel loader by superimposing the bottom plate on the support plate provided at intervals in the width direction of the wheel loader, and fastened by a plurality of bolts from above. To do. The hydraulic oil tank having a substantially rectangular parallelepiped shape is mounted on the bottom plate of each of the mounting brackets that are fastened and fastened to the rear frame body by fastening the bottom walls of both ends thereof, and fastened by bolts from below the bottom plate; The side walls of the both ends (side walls located in the backward direction of the wheel loader) are overlapped from the front of the upright plate and fastened with a plurality of bolts from the rear of the upright plate, thereby allowing the rear of the wheel loader to pass through each of the mounting brackets. Can be assembled to the frame body.
JP 2007-177501 A

As described above, in order to attach the hydraulic oil tank to the rear frame body of the wheel loader, each of the mounting brackets is required, so the number of parts increases and the cost increases. In addition, since each of the mounting brackets is fastened to the rear frame body, and then the hydraulic oil tank is fastened to each of the mounting brackets, the assembly work process and the work of the assembly work are increased, and the assembly work time is increased. Furthermore, since there are many fastening points with bolts, the assembling workability is poor, the assembling labor is increased, the assembling work time becomes long, and the fastening part is easily distorted or inclined due to the bolt tightening, There is a risk of quality degradation.

An object of the present invention is to provide a hydraulic oil tank for a new construction machine that can reduce the number of parts, reduce costs, reduce and reduce assembly work processes and labor, shorten work time, and ensure desired quality. Is to provide.

According to the present invention,
Mounting brackets for fastening directly to the frame of the construction machine with bolts are integrated with the sheet metal by projecting outwards from the container body a plurality of locations of the sheet metal that constitutes the container body that forms the hydraulic oil containing space. It is formed,
A hydraulic oil tank for a construction machine is provided.
Preferably, the container body includes a bottom plate that extends vertically in the horizontal direction, and the mounting bracket is formed integrally with the bottom plate by projecting both ends of the bottom plate in the longitudinal direction outward of the container body.

The hydraulic oil tank for a construction machine according to the present invention directly projects bolts from the container body to the construction machine frame by projecting a plurality of portions of the sheet metal constituting the container body forming the hydraulic oil storage space. A mounting bracket for fastening is formed integrally with the sheet metal. As a result, a pair of mounting brackets and bolts for fastening the pair of mounting brackets, which are separate members, for attaching the hydraulic oil tank to the frame are no longer necessary, so the number of parts can be reduced and the cost can be reduced. . In addition, the fastening work with bolts is only the work of fastening the mounting bracket integrated with the hydraulic oil tank directly to the frame with the bolts, so that the assembly workability is improved, the assembly work process is reduced, and the assembly is performed. The work effort is reduced and the assembly work time is shortened. Furthermore, in addition to the above-described effects, the occurrence of distortion or inclination of the fastening portion due to bolt tightening can be suppressed in addition to the above-described effects, and desired quality can be ensured.

Hereinafter, an embodiment of a hydraulic oil tank of a construction machine configured according to the present invention will be described in detail with reference to the accompanying drawings.

First, with reference to FIG. 9, a wheel loader including an embodiment of a hydraulic oil tank according to the present invention will be described. The wheel loader 100 includes a front frame body 102 and a rear frame body 104. The rear end portion of the front frame body 102 and the front end portion of the rear frame body 104 are coupled so as to be capable of relative rotation about the vertical axis 106. A working device 110 such as a front wheel 108 and a bucket is attached to the front frame body 102. A rear wheel 112, a cab 114, an engine room 116, and the like are attached to the rear frame body 104. A diesel engine (not shown), which is a drive source, is mounted at the rearmost position in the engine room 116. A hydraulic oil tank 2 configured according to the present invention is attached to the rear frame body 104 in front of the engine room 116.

1 to 5, the hydraulic oil tank 2 includes a first sheet metal 10, a second sheet metal 20, and a third sheet metal 30.

The first sheet metal 10 includes a rectangular main body 12 whose lateral length is longer than the vertical length, and perpendicular to the upper and lower ends of the main body 12 and parallel to each other in the same one-side direction of the main body 12 ( A rectangular upper wall portion 14 and a lower wall portion 16 that extend horizontally) and extend the same length. The overall length in the horizontal direction of the main body portion 12 and the overall length in the horizontal direction of the upper wall portion 14 are the same, but the overall length in the horizontal direction of the lower wall portion 16 is slightly longer (the length of the main body portion 12 is increased accordingly). The lower end of the is formed long in the horizontal direction). The upper wall portion 14 is provided with a filler neck & cap 18 for injecting hydraulic oil. One end of a breather pipe 19 is connected to the filler neck of the filler neck & cap 18. A plurality of mounting holes (not shown) in the embodiment are formed in both end regions in the lateral direction of the lower wall portion 16. The attachment holes are formed at intervals in the direction in which the lower wall portion 16 extends from the main body portion 12. The lower wall portion 16 is provided with a strainer-equipped pipe 16P for sending hydraulic oil to the hydraulic pump.

The second sheet metal 20 has a rectangular main body portion 22 whose lateral length is longer than the vertical length, and perpendicular to one side and the other side of the main body portion 22 in the same one-side direction in the main body portion 22. Rectangular side walls 24 and 26 extending parallel to each other (horizontally) and the same length are provided. The main body part 22 and the side wall parts 24 and 26 have the same height. In other words, the height of the second sheet metal 20 is constant. The height of the second sheet metal 20 is substantially the same as or slightly shorter than the distance between the lower surface of the upper wall portion 14 and the upper surface of the lower wall portion 16 of the first sheet metal 10. The overall length of the second sheet metal 20 in the lateral direction, that is, the length between the outer surfaces of the side wall portions 24 and 26 is formed shorter than the overall length of the first sheet metal 10 in the lateral direction. The length from the outer surface of the main body portion 22 of the second metal plate 20 to the front end surfaces of the side wall portions 24 and 26 is from the outer surface of the main body portion 12 of the first metal plate 10 to the front end surfaces of the upper wall portion 14 and the lower wall portion 16. The length is approximately the same as or slightly shorter than the length up to.

The third sheet metal 30 has a rectangular flat plate shape whose vertical length is longer than the horizontal length. The length of the third sheet metal 30 in the vertical direction is substantially the same as or slightly shorter than the distance between the lower surface of the upper wall portion 14 and the upper surface of the lower wall portion 16 of the first sheet metal 10. The lateral length of the third sheet metal 30 is approximately half or less than the length obtained by subtracting the lateral length of the second sheet metal 20 from the lateral length of the first sheet metal 10.

The second sheet metal 20 is inserted between the upper wall part 14 and the lower wall part 16 so that the front end surfaces of the side wall parts 24 and 26 face the inner surface of the main body part 12 of the first sheet metal 10. The second sheet metal 20 is disposed so that the lateral centers thereof substantially coincide with the first sheet metal 10. Therefore, the outer side surfaces of the side wall portions 24 and 26 of the second sheet metal 20 and the both lateral surfaces of the first sheet metal 10 are substantially equidistant from each other. In such a state, the second sheet metal 20 is integrally fixed to the first sheet metal 10 by welding. That is, the upper end surface of the second sheet metal 20 is on the lower surface of the upper wall portion 14 of the first sheet metal 10, and the lower end surface of the second sheet metal 20 is on the upper surface of the lower wall portion 16 of the first sheet metal 10. The front end surfaces of the side wall portions 24 and 26 of the sheet metal 20 are opposed to (in contact with) the inner surface of the main body 12 of the first sheet metal 10 and fixed by welding. Thereby, between the 1st sheet metal 10 and the 2nd sheet metal 20, the container body 40 which forms the storage space of hydraulic fluid of a substantially rectangular parallelepiped shape is formed. Both end regions of the lower wall portion 16 of the first sheet metal 10 are horizontally projected outward from the outer surfaces of the side wall portions 24 and 26 of the second sheet metal 20 (from the container body 40), and will be described later. A mounting bracket BK for directly fastening with a bolt 50 to a pair of support plates 122 provided on the rear frame body 104 of 100 is formed integrally with the first metal plate 10. The lower wall portion 16 of the first sheet metal 10 constitutes the bottom plate 16 of the container body 40 extending vertically in the horizontal direction.

The third sheet metal 30 is inserted between the upper wall part 14 and the lower wall part 16 of the first sheet metal 10 outside the side wall parts 24 and 26 of the second sheet metal 20, and the upper end surface is the first sheet metal 10. The lower surface of the upper wall portion 14 is the upper surface of the lower wall portion 16 of the first sheet metal 10 and the upper surface of the central portion between the mounting holes (not shown). The side walls 24 and 26 are respectively opposed (contacted) to the outer side surfaces of the side wall portions 24 and 26 and fixed by welding. The third sheet metal 30 functions as a reinforcing plate.

7 and 8, the rear frame body 104 of the wheel loader 100 (FIG. 9) is parallel to the front-rear direction (the forward / reverse direction of the wheel loader 100) with an interval in the width direction of the wheel loader 100. A pair of frames 120 are provided. Support plates 122 are integrally fixed to the inner symmetrical positions of the vertical surfaces of the pair of frames 120 facing each other. Each of the support plates 122 having substantially the same configuration with each other has a horizontal upper surface extending horizontally in the front-rear direction with the same height and a constant width. Each of the support plates 122 is formed with two mounting holes (not shown) corresponding to the mounting holes (not shown) of the hydraulic oil tank 2, and each of the support plates 122 is formed on the lower surface where the mounting holes (not shown) are formed. The nut 124 is fixed to the concentric position with the mounting hole by welding. In the hydraulic oil tank 2 configured as described above, the mounting brackets BK formed at both end regions of the lower wall portion 16 of the first sheet metal 10 are placed on the upper surface of the corresponding support plate 122 and aligned with each other. Bolts 50 are inserted into the mounting holes and nuts 124 and fastened via washers 52. In addition, the code | symbol of the washer 52 is attached | subjected only to FIG. 1 for the simplification of illustration, and is abbreviate | omitting in the other figure. FIG. 6 shows a state in which the hydraulic oil tank 2 is attached to the rear frame body 104 of the wheel loader 100 as described above.

The hydraulic oil tank 2 according to the present invention includes a plurality of locations (first and second locations in the embodiment) of the first sheet metal 10 among the first sheet metals 10 and 20 constituting the container body 40 that forms the hydraulic oil housing space. ) Projecting outward from the container body 40 (in the embodiment, by projecting both end regions of the lower wall portion 16 of the first sheet metal 10 horizontally laterally outward), the frame of the wheel loader 100 A mounting bracket BK for fastening directly with the bolt 50 to the support plate 122 fixed to the frame 120 of the rear frame body 104 in the embodiment is formed integrally with the first sheet metal 10. With the above configuration, the pair of mounting brackets and the bolts for fastening the pair of mounting brackets, which are separate members, for attaching the hydraulic oil tank 2 to the rear frame body 104 are not necessary. The number of points can be reduced and the cost can be reduced. Further, the fastening work using the bolts is only a work for fastening the mounting bracket BK integral with the hydraulic oil tank 2 directly to the support plate 122 with the bolts 50, so that the workability of the assembly is improved and the assembly work process is improved. As a result, the assembling work time is reduced and the assembling work time is shortened. Furthermore, in addition to the above-described effects, the occurrence of distortion or inclination of the fastening portion due to bolt tightening can be suppressed in addition to the above-described effects, and desired quality can be ensured.

In the hydraulic oil tank 2 according to the present invention, the container body 40 includes a bottom plate 16 extending vertically in the horizontal direction, and both longitudinal ends of the bottom plate 16 project outward from the container body 40, thereby mounting brackets. BK is formed integrally with the bottom plate 16. Such a configuration contributes to practically and reliably achieving the above effect with a simple configuration.

In the above embodiment, the hydraulic oil tank 2 is attached to the rear frame body 104 of the wheel loader 100, but is not limited to this, and may be provided at any position of the construction machine.

It is a perspective view which shows embodiment of the hydraulic oil tank of the wheel loader based on this invention. It is the front view which looked at the hydraulic oil tank shown in FIG. 1 from the back surface in FIG. FIG. 3 is a side view of the hydraulic oil tank shown in FIG. 2 as viewed from the left in FIG. 2. FIG. 3 is a side view of the hydraulic oil tank shown in FIG. 2 viewed from the right side in FIG. 2. FIG. 3 is a plan view of the hydraulic oil tank shown in FIG. 2. FIG. 10 is a perspective view showing a state in which the hydraulic oil tank shown in FIG. 1 is assembled to the rear frame body of the wheel loader shown in FIG. 9. FIG. 10 is a plan view of a rear frame body of the wheel loader shown in FIG. 9. FIG. 8 is a side view of the rear frame body shown in FIG. 7. It is a side view of the wheel loader provided with the hydraulic oil tank shown in FIG.

Explanation of symbols

2: Hydraulic oil tank 10: Sheet metal 20: Sheet metal 30: Sheet metal 40: Container body 50: Bolt 100: Wheel loader 104: Rear frame body 120: Frame 122: Support plate BK: Mounting bracket

Claims (2)

Mounting brackets for fastening directly to the frame of the construction machine with bolts are integrated with the sheet metal by projecting outwards from the container body a plurality of locations of the sheet metal that constitutes the container body that forms the hydraulic oil containing space. It is formed,
A hydraulic oil tank for a construction machine. The container body includes a bottom plate that extends vertically in the horizontal direction, and the mounting bracket is formed integrally with the bottom plate by projecting both longitudinal ends of the bottom plate to the outside of the container body, respectively. Hydraulic oil tank for construction machinery.

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