JP2009074310A - Operating fluid tank of construction machine, and reinforcing member for the tank - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To easily reinforce a tank body side face part if necessary in the installed state of a tank in a machine. <P>SOLUTION: This operating fluid tank 26 is provided with a mounting member 31 with threaded holes 30 in the side face of a tank body 27, and mounting seats 29 with bosses 28 at a bottom face. Latching parts 39, 40 provided at the lower end of a reinforcing member 33 are latched to the bosses 28, 28 and a thread-fastening part 41 provided at the upper end is thread-fastened to the mounting member 31 using the threaded holes 30, 30 to after-fit the reinforcing member 33 in the upper and lower fixed state to the tank body 27. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a hydraulic oil tank and a tank reinforcing member mounted on a construction machine such as a hydraulic excavator.

  The background art will be described using a hydraulic excavator as an example.

  As shown in FIG. 8, the hydraulic excavator has an upper frame 2 mounted on a crawler-type lower traveling body 1 so as to be rotatable around a vertical axis (rotation center) O, and an upper frame serving as a base of the upper structure 2. Various facilities including the cabin 4 are mounted on the front side 3, a work attachment 8 including a boom 5, an arm 6 and a bucket 7 is mounted on the front of the frame 3, and a counterweight 9 is mounted on the rear end. Configured.

  In the following description regarding the upper frame 3, the position of the cabin 4 is defined as the left front portion, and the directions of “left and right” and “front and rear” are referred to based on this position.

  FIG. 9 shows the upper frame structure and device mounting status. Here, for simplification of the drawings and description, detailed illustration and description of each part of the upper frame and devices not directly related to the present invention are omitted.

  The upper frame 3 is generally composed of a bottom plate 10 and a pair of left and right vertical plates (vertical ribs or the like) fixed on the bottom plate 10 over substantially the entire length in the front-rear direction at an intermediate portion in the left-right (vehicle width) direction. 11 and 12 and intermediate, left and right partition plates 13, 14, 15 fixed in the left-right direction on the bottom plate 10 in a state orthogonal to the vertical plates 11, 12 at the rear. .

  In addition, as equipment, an engine 16 is installed at the center of the rear portion of the upper frame partitioned by the respective partition plates 13 to 15, a hydraulic pump 17 is installed on the right side, a radiator and a cooling fan (not shown) are installed on the left side, and a boom cylinder, etc. A hydraulic oil tank 18 storing hydraulic oil to be supplied to the hydraulic actuator is installed in front of the right partition plate 15 on the right side of the upper frame. In FIG. 9, reference numerals 19 and 19 denote hydraulic oil tank mounting brackets for fixing the hydraulic oil tank 18 to the upper frame 3.

  This hydraulic oil tank 18 is shown in FIG. Here, for simplification of the drawings and description, illustration and description of each part of the tank that is not directly related to the present invention, such as a fuel filler port, a drain port, and the like, are omitted.

  The main body 20 of the hydraulic oil tank 18 is formed in a rectangular parallelepiped box shape by bending and welding a metal plate material.

  L-shaped mounting seats 22 having cylindrical bosses 21 are welded to the four corners of the tank body 20 so as to wrap around the bottom surface from the lower end of the side surface, and the entire tank is mounted on brackets 19 and 19 shown in FIG. The bosses 21 are screwed to the brackets 19 and 19 in a state of being placed on the top.

  Further, a band-plate-like mounting member 24 having screw holes 23, 23 on the left and right sides is welded to one side upper part of the tank body 18, and this mounting member 24 is screwed to the right partition plate 15 in FIG. The

  Note that a band plate-like contact plate 25 is welded to the side surface of the tank body below the attachment member 24, and the contact plate 25 contacts the right partition plate 15.

  Thereby, the hydraulic oil tank 18 is fixed to the upper frame 3 at the bottom surface portion and the back surface portion.

  In the manufacturing stage, the hydraulic oil tank 18 is designed and assembled with a strength that can withstand a preset tank internal pressure.

For example, Patent Documents 1 and 2 disclose a structure for reinforcing a tank body in order to obtain a necessary tank strength at the tank manufacturing stage.
JP 2007-22399 A Japanese Utility Model Publication No. 6-79850

  However, in a hydraulic excavator, the maximum pressure may change due to a change in actuator specifications or the like at the stage of use, which may increase the tank internal pressure.

  In this case, since it is very difficult to remove the hydraulic oil tank 18, there is a demand for attaching a reinforcing member to a side surface that needs reinforcement in the installed state. However, if the reinforcing member is welded as in the manufacturing stage, there is a risk of fire, and the welding work is extremely troublesome because there is no extra work space in the tank installation part.

  In addition, it is theoretically possible to process the screw holes on the side surface of the tank body and bolt them on site, but this is not practical in terms of work space.

  Furthermore, it is conceivable that the reinforcing member is fixed in the manufacturing stage in consideration of the necessity for later reinforcement. However, since this reinforcement is often wasted, it is extremely disadvantageous in terms of cost.

  Therefore, the present invention provides a hydraulic oil tank for a construction machine and a tank reinforcing member that can easily reinforce a side surface of a tank main body as needed while being installed in a machine.

  According to the first aspect of the present invention (hydraulic oil tank), a mounting member with a threaded hole is provided on the upper side of the tank body, and a mounting seat with a boss is provided on the bottom surface of the tank body. A hydraulic oil tank for a construction machine attached to a frame is provided with a reinforcing member that is attached to the tank body retrofitted, and the reinforcing member has a screwing portion at the top and a latching portion that goes around to the bottom side of the tank body at the bottom. Provided respectively, the screwing part is screwed to the mounting member by the screw hole, and the reinforcing member is attached to the side surface of the tank body by hooking the latching part to the boss of the mounting seat. It is.

  According to a second aspect of the present invention, in the configuration of the first aspect, a reinforcing member is configured by connecting a reinforcing member main body to a latching portion formed separately from the reinforcing member body, and an adjuster bolt is provided at the leading end. Is screwed in a state where it is in contact with the reinforcing member body from the outside, and the adjuster bolt is tightened with the latching portion latched on the boss of the mounting seat, thereby pulling the latching portion outward and the reinforcement member body It is configured to be pressed against the tank body side surface.

  According to a third aspect of the present invention, in the configuration of the first or second aspect, the reinforcing member is provided with a plurality of latching portions corresponding to the plurality of mounting seats provided at intervals on the bottom surface of the tank body. The stoppers are configured to be hooked on the bosses of the corresponding mounting seats.

  According to a fourth aspect of the present invention, in any one of the first to third aspects, the reinforcing member includes a vertical rib extending in the vertical direction, and a latching portion is provided at a lower end portion of the vertical rib.

  According to a fifth aspect of the present invention, in the configuration of the fourth aspect, the reinforcing member includes left and right vertical ribs, and the latching portion is provided across the lower end portions of both the vertical ribs.

  The invention (reinforcing member) according to claim 6 is an operation that is retrofitted to a tank main body provided with a mounting member with a screw hole on the upper side and a mounting seat with a boss on the bottom as tank mounting means for the machine frame. An oil tank reinforcing member having an upper portion with a screwing portion screwed to the mounting member, and a lower portion with a latching device that wraps around the bottom surface of the tank body and is hooked on the boss of the mounting seat. It is provided.

  According to the present invention, in a hydraulic oil tank provided with a mounting member with a screw hole on the side surface of the tank body and a mounting seat with a boss on the bottom surface, the latching portion of the reinforcing member is latched on the boss and the screwing portion is attached. Since the reinforcement member is retrofitted to the tank in a vertically fixed state by screwing to the member, the reinforcement member can be attached to the tank as long as it can secure a small working space enough to perform both the above-mentioned latching and screwing operations on the side of the tank. Can be attached to the body.

  That is, it is possible to reinforce the tank safely and easily without requiring dangerous welding work or troublesome threading work with the tank installed in the machine.

  In addition, it is possible to easily replace the reinforcing member in accordance with a further increase in the tank internal pressure.

  In this case, according to the second aspect of the present invention, the reinforcing member is connected to the reinforcing member main body to form a reinforcing member, and the hanging portion is hooked on the boss of the mounting seat. Since the adjuster bolt screwed into the stopper is tightened to pull the stopper to the outside (in the direction of pulling the boss), the reinforcement member body is pressed against the tank body side by the reaction force. The mounting state can be made stronger and more stable.

  Moreover, since the reinforcing member main body can be brought into close contact with the side surface of the tank main body, the effect of reinforcing the side surface of the main body can be enhanced.

  According to the invention of claim 3, since the plurality of latching portions are latched by the plurality of bosses, the attachment state of the reinforcing member can be further stabilized and the reinforcing effect can be further enhanced.

  By the way, in a state where the reinforcing member is attached to the tank body, a large tensile force or compressive force may act on the latching portion due to the vibration of the tank accompanying the running of the machine or the like.

  In this case, according to the inventions of claims 4 and 5, since the latching portion is provided at the lower end portion of the vertical rib having high strength and rigidity among the reinforcing members, the latching portion or the entire reinforcing member is prevented from being deformed or damaged. be able to. The effect of this point is particularly noticeable in the invention of claim 5 in which the vertical ribs are provided on the left and right sides and the latching portion is provided across the lower ends of both the vertical ribs.

  On the other hand, the invention (reinforcing member) according to claim 6 can be widely used in existing hydraulic oil tanks provided with a mounting member with a screw hole on the upper side of the tank body and a mounting seat with a boss on the bottom.

In the following embodiment,
(I) The main body 27 of the hydraulic oil tank 26 is formed into a rectangular parallelepiped box shape by bending and welding a metal plate material,
(Ii) On the bottom surface side of the tank body 27, L-shaped mounting seats 29 having a cylindrical boss 28 are welded to the four corners in a state of wrapping around from the bottom of the side surface to the bottom surface side,
(Iii) A strip-shaped attachment member 31 having screw holes 30 and 30 on both left and right sides, and a backing plate 32 is welded to the lower part of the tank body 27 on one side upper part,
(Iv) With the entire tank placed on the brackets 19 and 19 shown in FIG. 9, the bosses 28 are screwed to the brackets 19 and 19, and the mounting member 31 is screwed to the right partition plate 15 shown in FIG. Points that are stopped and fixed,
These are the same as the conventional hydraulic oil tank 18 shown in FIG.

1st Embodiment (refer FIGS. 1-5)
FIG. 1 shows a state before the reinforcing member is attached, and FIGS. 2 to 5 show a state where the reinforcing member 33 is attached to one side surface (side surface on which the attaching member 31 is provided) of the tank main body 27.

  In addition, in this specification, the up-down and front-rear-left-right directionality about each part including the reinforcement member 33 shall be based on the directionality of FIGS. For example, with respect to the tank 26, the side surface of the tank body 27 to which the reinforcing member 33 is attached is the rear side surface, the opposite side is the front side surface, and the direction in which the attachment member 31 extends is the left and right.

  The reinforcing member 33 is formed on the lower end portion of the reinforcing member main body 38 formed by welding the left and right two strip-like vertical ribs 35, 36, and 37 to one side of a metal plate material 34. The left and right latching portions 39, 40 formed separately from 38 are attached, and a screwing portion 41 extending in the left-right direction is provided at the upper end portion of the reinforcing member main body 38.

  Screw holes 42 and 43 are provided on both the left and right sides of the screwing portion 41, and mounting screws (bolts) 44 and 45 are screwed into the screw holes 30 and 30 of the mounting member 31 through the screw holes 42 and 43. Thus, the upper portion of the reinforcing member 33 is attached to the tank body 27.

  The screw threaded hole 42 on the left side of the screwing portion 41 is formed as a notch opened leftward as shown in the figure, and the screw threaded hole 42 is formed with the left mounting screw 44 temporarily tightened to the screw hole 30 first. The mounting screw 44 is inserted from the right side, the position is adjusted, and the final tightening is performed. With this configuration, the vertical and horizontal positioning of the reinforcing member 33 can be facilitated, and the mounting operation can be simplified.

  The left vertical ribs 35, 36 of the reinforcing member main body 38 are fixed to the plate member 34 in such a manner that the lower half portion is inclined leftward and intersects in a V shape at the lower end portion. A left side latching portion 39 is provided at the lower end portion.

  The right vertical rib 37 is fixed to the plate material 34 in an inclined arrangement intersecting with the left vertical ribs 35, 36 in an X shape, and a right latch 40 is provided at the lower end of the right vertical rib 37.

  The left and right latching portions 39, 40 are hook-like horizontal hooking portions 46 hooked on the bosses 28, 28 of the rear left and right mounting seats 29, 29, and vertically from the base end side of the hooking portion 46. The connecting portion 47 is configured to rise and a vertical bolt seat 48 orthogonal to the connecting portion 47, and the connecting portion 47 is configured to be detachably connected to the lower ends of the vertical ribs 35 and 38 by bolts 49. .

  Further, adjuster bolts 50, 50 are screwed into the bolt seat 48, whereby the mounting state of the reinforcing member 33 is stabilized by the bolts 50, 50 and the reinforcing effect is enhanced.

  The attachment procedure and operation of the reinforcing member 33 including this point will now be described.

  (A) The screwing portion 41 of the reinforcing member main body 38 is attached to the upper portion of the side surface of the tank main body 27 by the attaching screws 44 and 45 as described above.

  (B) In the state where the left and right latching portions 39, 40 are separated from the reinforcing member main body 38, the respective latching portions 46 are hooked on the bosses 28, 28 of the left and right mounting seats 29, 29, and the connecting portion 47 Is temporarily connected to the reinforcing member main body 38 with bolts 49 (the bolts 49 are temporarily tightened).

  (C) In this state, adjuster bolts 50 and 50 are screwed in and tightened with their tips abutting against the end faces of the vertical ribs 35 and 37.

  As shown in FIG. 5, the latching portions 39, 40 are pulled outward (rearward) by the tightening force as shown in FIG. 5, and the respective latching portions 46 are in close contact with the boss 28 and are firmly latched. A stop state is obtained.

  At the same time, the reinforcing member main body 38 is pressed against the side surface of the tank main body by the reaction force indicated by the arrow B in FIG.

  (D) In this state, the bolt 49 of the connecting portion 47 is finally tightened, and the latching portions 39 and 40 are finally connected to the reinforcing member main body 38.

  In this way, the reinforcing member 33 is attached to the side surface of the tank body 27.

  As described above, in the hydraulic oil tank 26 in which the attachment member 31 with the screw holes 30 and 30 is provided on the side surface of the tank body 27 and the attachment seat 29 with the boss 28 is provided on the bottom surface, the latching portion 40 of the reinforcing member 33 is provided. Since the reinforcing member 33 is retrofitted to the tank in a vertically fixed state by hooking on the boss 28 and screwing the screwing portion 41 to the mounting member 31, both the hooking and screwing operations are performed on the side of the tank. The reinforcing member 33 can be attached to the tank body 27 as long as a small working space can be secured.

  That is, it is possible to reinforce the tank 26 safely and easily without requiring a dangerous welding operation or troublesome screw machining operation with the hydraulic oil tank 26 installed in the machine.

  In addition, the reinforcing member 33 can be easily replaced according to a further increase in the tank internal pressure or the like.

  In the drawing, the mounting screws 44 and 45 are shown as attaching the upper part of the reinforcing member exclusively to the mounting member 31, but the mounting member 31 is originally for mounting the tank 26 to the right partition plate 15 of FIG. Therefore, in practice, the mounting screws 44 and 45 are screwed into the mounting member 31 through the right partition plate 15 (fastened together).

  In addition, according to the above configuration, since the latching portions 39 and 40 are drawn to the outside by the adjuster bolt 50 and the reinforcing member main body 38 is brought into close contact with the side surface of the tank main body by the reaction force, the mounting state of the reinforcing member 33 Can be made stronger and more stable, and the tank reinforcing effect of the reinforcing member main body 38 can be enhanced.

  Further, since the reinforcing member 33 is hooked to the tank body 27 (bosses 28, 28) on the left and right sides by the left and right latching portions 39, 40, the mounting state of the reinforcing member 33 is further stabilized and the reinforcing effect is further enhanced. Can do.

  On the other hand, since the latching portions 39 and 40 are provided at the lower end portions of the longitudinal ribs 35 and 37 having high strength and rigidity among the reinforcing members 33, the latching portions are greatly pulled by vibrations of the tank 26 caused by machine running or the like. Even if a force or a compressive force is applied, deformation or breakage of the latching portions 39, 40 or the entire reinforcing member 33 can be prevented.

Second embodiment (see FIGS. 6 and 7)
Only differences from the first embodiment will be described.

  In the first embodiment, the lower end portion of the reinforcing member main body 38 is hung on the bottom surface of the tank main body (the bosses 21, 21 of the left and right side mounting seats 22, 22) on both the left and right sides, whereas in the second embodiment, Is configured such that the reinforcing member main body 38 is hooked on the bottom surface of the tank main body (the boss 21 of the left mounting seat 22) by the hooking portion 51 only on the left side.

  According to this configuration, the reinforcing range of the tank body 27 by the reinforcing member 33 is narrower than that of the first embodiment, and the reinforcing member 33 can be easily attached. Therefore, it is only necessary to select one of the first and second embodiments according to the necessary degree of reinforcement.

  In the second embodiment, a pair of left and right vertical ribs 53 and 54 are provided substantially parallel to a substantially T-shaped plate member 52, and the latching portion 51 is attached across the lower ends of both the vertical ribs 53 and 54. ing.

  The latching portion 51 includes a single hooking portion 55, a pair of left and right connecting portions 56 and 56, and bolt seats 57 and 57. Both the connecting portions 56 and 56 are respectively attached to the left and right vertical ribs 53 and 54 with bolts 49, respectively. The pair of left and right adjuster bolts 50, 50 screwed into both bolt seats 57, 57 can be adjusted so that the pulling force of the hook portion 55 against the boss 28 and the pressing force of the reinforcing member main body 38 against the side surface of the tank main body can be adjusted. It is configured.

  In order to increase the strength and rigidity of the reinforcing member main body 38, a plurality of horizontal ribs 58 are provided between the left and right vertical ribs 53, 54.

  Thus, by providing the latching portion 51 across the left and right vertical ribs 53, 54, the strength and rigidity of the latching portion 51 can be further enhanced, and at the same time, the strength and rigidity of the reinforcing member main body 38 can be increased. Can do.

  By the way, the reinforcing member 33 can take various variations. For example, in the configuration of the first embodiment in which both the first and second embodiments are combined and the latching portions are provided on both left and right sides, the configuration of the second embodiment (on the lower end portions of the left and right vertical ribs) It is also possible to take a configuration in which the latching portion is attached across the board.

  Further, the shape of the reinforcing member main body 38, the arrangement of the vertical ribs and the horizontal ribs, and the like can be variously changed according to the required degree of tank reinforcement and the like.

  Further, in both the first and second embodiments, the latching portions 39, 40, 51 formed separately from the reinforcing member main body 38 are connected by bolts. Also good.

  On the other hand, in both embodiments, the case where the reinforcing member 33 is attached only to one side surface (rear side surface) of the tank main body 27 is illustrated, but the side surface that is provided with the mounting member 31 with a screw hole and requires reinforcement is the other. In the case of a tank in the tank, it can be attached to the side of the tank.

It is the perspective view which looked at the state before the reinforcement member attachment of the hydraulic oil tank concerning 1st Embodiment of this invention from the bottom face side. It is a perspective view of the reinforcing member attachment state of the tank. It is the expansion perspective view which looked at a part of Drawing 2 from the top. It is a front view of the tank of a reinforcement member attachment state. It is the VV line expanded sectional view of FIG. It is a front view of the reinforcement member attachment state of the hydraulic oil tank concerning 2nd Embodiment of this invention. It is the bottom view. 1 is an overall schematic side view of a hydraulic excavator on which a hydraulic oil tank is mounted. It is a top view of the upper frame of the shovel. It is the perspective view which looked at the conventional hydraulic oil tank from the bottom side.

Explanation of symbols

26 Hydraulic oil tank 27 Tank body 28 Boss 29 Mounting seat 30 Screw hole 31 Mounting member 33 Reinforcing member 34 Plate material 35-37 Vertical rib 38 Reinforcing member body 39, 40 Hooking part 41 Screwing part 42, 43 Screw hole 44, 45 Mounting screw 46 Hook part of latching part 47 Same connecting part 48 Same bolt seat 49 Connecting bolt 50 Adjuster bolt 51 Hooking part 52 Plate material 53, 54 Vertical rib 55 Hook part 56,56 Both connecting parts 57,57 Bolt seat

Claims (6)

  In the hydraulic oil tank of the construction machine, which is provided with a mounting member with a screw hole on the upper side surface of the tank body and a mounting seat with a boss on the bottom surface of the tank body, and is attached to the machine frame by this mounting member and the mounting seat The tank body is provided with a reinforcing member that is attached later, and the reinforcing member is provided with a screwing portion at the upper portion and a latching portion that goes around the bottom surface of the tank main body at the lower portion, and the screwing portion is attached to the mounting member. A hydraulic oil tank for a construction machine, wherein the reinforcing member is attached to a side surface of a tank body by screwing with the screw hole and hooking the latching portion on a boss of the mounting seat.   A reinforcing member is connected to the reinforcing member main body separately from the latching portion to form a reinforcing member, and an adjuster bolt is screwed into the latching portion with the tip abutting on the reinforcing member main body from the outside. By tightening the adjuster bolt with the latching part latched on the boss of the mounting seat, the latching part is drawn to the outside and the reinforcing member main body is pressed against the side surface of the tank main body. A hydraulic oil tank for a construction machine according to claim 1.   The reinforcement member is provided with a plurality of latching portions corresponding to a plurality of mounting seats provided at intervals on the bottom surface of the tank body, and each latching portion is latched on the boss of the corresponding mounting seat. The hydraulic oil tank for a construction machine according to claim 1 or 2, wherein the hydraulic oil tank is constructed as described above.   The hydraulic oil tank for a construction machine according to any one of claims 1 to 3, wherein the reinforcing member includes a vertical rib extending in a vertical direction, and a latching portion is provided at a lower end portion of the vertical rib.   5. The hydraulic oil tank for a construction machine according to claim 4, wherein the reinforcing member includes left and right vertical ribs, and a latching portion is provided straddling the lower ends of both vertical ribs.   As a tank mounting means for the machine frame, it is a hydraulic oil tank reinforcing member that is attached later to a tank body that has a mounting member with a screw hole on the upper side and a mounting seat with a boss on the bottom. The construction machine is characterized in that a screwing portion to be screwed to the mounting member, and a latching tool to wrap around the bottom surface of the tank body and to be hooked on the boss of the mounting seat are provided at the lower part. Reinforcing member for oil tank.

Images