JP2005264557A - Working machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a working machine improved in working efficiency in filling an operating fluid. <P>SOLUTION: A filler 61 is provided projecting in an upward inclined manner in a position not to interfere with a working device vehicle 3 in the swinging state of the working device vehicle 3 of an operating fluid tank 5 of a wheel loader. The breakage of the filler 61 caused by an interference with the working device vehicle 3 can thereby be prevented, and the operating fluid can be filled into the filler 61 from the upper side to suppress the spill of the operating fluid while improving working efficiency in filling the operating fluid. A plug 64 openable/closable using a tool is provided at a filler hole 63 to prevent fuel or the like from being erroneously supplied to the operating fluid tank, for instance. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a work machine including a hydraulic oil tank in which hydraulic oil is stored.

  2. Description of the Related Art Conventionally, a work machine such as a wheel loader includes a machine body vehicle that can travel, and the machine body vehicle includes a work device vehicle that includes a work device that lifts or tilts a bucket by a hydraulic cylinder. They are connected (for example, refer to Patent Document 1).

A hydraulic oil tank that stores hydraulic oil supplied to and discharged from the hydraulic cylinder and the pump motor is provided on the side of the machine body vehicle of this type of work machine. In this hydraulic oil tank, an inlet for injecting hydraulic oil is formed in a horizontal direction with respect to the hydraulic oil tank. A plug for preventing fuel or the like from being inadvertently injected is provided at the inlet so as to be opened and closed.
Japanese Patent Laid-Open No. 11-286156 (FIG. 2)

  By the way, since the hydraulic oil gradually deteriorates as it is repeatedly supplied and discharged, it is necessary to replace it every predetermined time.

  However, in the work machine described above, since the inlet is provided substantially horizontally at the side of the hydraulic oil tank, the hydraulic oil must be supplied horizontally from the side of the hydraulic oil tank. There is a risk that hydraulic oil may spill, and workability is not good.

  This invention is made | formed in view of such a point, and it aims at providing the working machine which can improve the workability | operativity of hydraulic oil supply.

  According to the first aspect of the present invention, a machine main body vehicle, a work device operable by a hydraulic actuator and connected to the machine main body vehicle in a swingable manner, and the work device in a swinging state of the work device vehicle. A hydraulic oil tank provided in a machine main body vehicle at a position facing at least a part of the vehicle and storing hydraulic oil supplied to and discharged from a hydraulic actuator; It is provided with a fuel filler opening projecting upwardly at a position that does not interfere with the work equipment vehicle in a moving state and having an inlet opening at the tip, and a plug that can be opened and closed at the inlet. The working oil tank is a working oil tank for storing hydraulic oil supplied and discharged to a hydraulic actuator that operates the working device. Open By projecting the refueling port body that is inclined upward, it is possible to prevent damage to the refueling port body due to interference with the work equipment vehicle and to inject hydraulic oil from above into the refueling port body The spillage of hydraulic oil is suppressed, the workability of hydraulic oil supply is improved, and a plug that can be opened and closed by a tool is provided at the inlet so that, for example, fuel can be accidentally supplied to the hydraulic oil tank. To prevent.

  According to a second aspect of the present invention, in the work machine according to the first aspect, the injection port has a distal end located inside the vehicle width of the machine body vehicle. By positioning it inside the vehicle width of the main body vehicle, the fuel filler opening is prevented from being damaged by contact or the like.

  According to a third aspect of the present invention, in the work machine according to the first or second aspect, the hydraulic oil tank can be viewed from the outside at least at a position below the injection port. The oil level of hydraulic oil stored inside the hydraulic oil tank can be easily visually confirmed from the outside by the site gauge, and at least below the inlet. Providing a site gauge on the side prevents hydraulic oil from spilling from the inlet.

  According to a fourth aspect of the present invention, in the work machine according to any one of the first to third aspects, the working machine vehicle is formed between the position of the working device vehicle facing the hydraulic oil tank and the working tank in a swinging state of the working device vehicle. And a space portion that expands upward in the inclination direction of the oil supply port body, and is formed between a position facing the hydraulic oil tank and the hydraulic oil tank in a swinging state of the work equipment vehicle. Since the space portion is expanded upward in the inclination direction of the oil supply port body, it is possible to supply hydraulic oil from the injection port even when the working device vehicle is in a swinging state, and the usability is improved.

  According to the first aspect of the present invention, the oil supply port body is provided so as to project in an upwardly inclined manner at a position where it does not interfere with the work device vehicle in a swinging state of the work device vehicle of the hydraulic oil tank. It is possible to prevent breakage of the filler hole due to interference, and to inject hydraulic oil from the upper side into the filler hole body, to suppress the spillage of hydraulic oil and improve the workability of hydraulic oil supply, and it can be opened and closed with a tool By providing a simple plug at the inlet, it is possible to prevent, for example, fuel from being supplied to the hydraulic oil tank by mistake.

  According to the second aspect of the present invention, it is possible to prevent the fuel filler opening from being damaged due to contact or the like by positioning the inlet of the fuel filler outlet on the inner side of the vehicle width of the machine body vehicle.

  According to the invention described in claim 3, the oil level of the hydraulic oil stored in the hydraulic oil tank can be easily visually confirmed from the outside by the site gauge, and the site gauge is provided at least below the inlet. Therefore, it is possible to prevent spilling of hydraulic oil from the inlet.

  According to the fourth aspect of the present invention, the space formed between the position facing the hydraulic oil tank and the hydraulic oil tank in the swinging state of the work equipment vehicle is inclined upward in the oil supply port body. With the expansion, the working oil can be supplied from the injection port even when the working device vehicle is swinging, and the usability can be improved.

  Hereinafter, the present invention will be described in detail with reference to the embodiment shown in FIGS.

  1 and 2 show a wheel loader as a work machine. The wheel loader can be articulated, that is, rocked in the left-right direction by a rocking shaft 2 in front of the machine body vehicle 1 and the machine body vehicle 1. A driver seat 4 is provided on the upper portion of the machine main body vehicle 1, and a canopy or cab (not shown) is provided on the upper portion of the driver seat 4. A hydraulic oil tank 5 that stores hydraulic oil is provided on one side of the front side of the main vehicle 1, and a fuel tank (not shown) that stores fuel is provided in the machine main vehicle 1.

  The machine body vehicle 1 is equipped with an engine (not shown), a hydraulic pump (not shown) driven by the engine, and a control valve (not shown) connected to the hydraulic pump. And a hydraulic pump pressurizes and supplies hydraulic oil to various hydraulic actuators via a control valve.

  Further, the machine body vehicle 1 and the work device vehicle 3 are provided with drive wheels 11 and 11 that are driven to rotate by a hydraulic motor (not shown) that receives hydraulic pressure from a hydraulic pump, respectively, so as to be rotatable on both sides. The machine body vehicle 1 and the work device vehicle 3 are provided by the drive wheels 11 and 11 so as to be able to travel.

  Further, the machine body vehicle 1 is provided with a hydraulic cylinder for steering (not shown) as a hydraulic actuator for swinging the work apparatus vehicle 3 with respect to the machine body vehicle 1 with the swing shaft 2 as a fulcrum.

  The work device vehicle 3 includes a work device vehicle frame 12 on which drive wheels 11 and 11 are turnably provided, and a work device 13 provided on the work device vehicle frame 12 so as to be operable.

  The work apparatus vehicle frame 12 is provided with mudguard plates 16 and 16 as space forming portions behind the drive wheels 11 and 11, respectively.

  Each mudguard plate 16 includes a horizontal plate portion 16a provided horizontally in the front-rear direction, and a rear inclined plate portion 16b that continues to the rear end portion of the horizontal plate portion 16a and is inclined downward toward the rear. . Therefore, a space 17 is formed between the rear inclined plate portion 16b of the mudguard plate 16 provided on the right side of the work device vehicle frame 12 and the hydraulic oil tank 5 in the swinging state of the work device vehicle 3. . Accordingly, the space 17 is expanded forward with the front side facing upward.

  The work device 13 includes a pair of lift arms 21 and 21 projecting forward from the work device vehicle frame 12, and a pair of lift cylinders 22 and 22 as hydraulic actuators connected to the lift arms 21 and 21, respectively. A link 23, a tilt cylinder 24 as a hydraulic actuator connected to the link 23, and a bucket 25 rotatably provided at the tip ends of the lift arms 21 and 21 and the link 23 are provided.

  Each lift arm 21 is formed in a longitudinal shape in the front-rear direction, a base end portion is connected to the work apparatus vehicle frame 12 so as to be rotatable in the vertical direction, and a tip end portion is bent downward with respect to the base end portion. In addition, each bracket 26 provided at the rear portion of the bucket 25 is rotatably connected to each other, and a tip end portion of each lift cylinder 22 is rotatably connected to an intermediate portion in the longitudinal direction.

  Each lift cylinder 22 lifts the bucket 25 together with each lift arm 21, and a base end portion is connected to the work apparatus vehicle frame 12 so as to be rotatable in the vertical direction.

  The link 23 is formed in a vertical shape in the up-down direction, the tip end of the tilt cylinder 24 is rotatably connected to the base end side, and the tip end is rotatably connected to the rear part of the bucket 25 The intermediate portion in the longitudinal direction is connected to the link so as to be rotatable, and is rotatably connected between the pivot support brackets 27 and 27 provided between the lift arms 21 and 21.

  Each tilt cylinder 24, together with the link 23, tilts the bucket 25, and a base end portion is connected to the work apparatus vehicle frame 12 so as to be rotatable in the vertical direction.

  The hydraulic oil tank 5 stores hydraulic oil supplied to and discharged from various hydraulic actuators such as a lift cylinder 22 and a tilt cylinder 24 and pilot oil. The hydraulic oil tank 5 is disposed on the front side of the machine body vehicle 1 facing the work device vehicle 3. It is attached to one side with a bolt or the like (not shown) and is located on the front side of the driver's seat 4. Further, as shown in FIG. 3, the hydraulic oil tank 5 includes a bottom plate portion 31, an outer plate portion 32 projecting vertically upward from the periphery of the bottom plate portion 31, a rear plate portion 33, an inner plate portion 34, It has a front side plate portion 35 and a top plate portion 36, and the lower side is formed narrower than the upper side.

  The bottom plate portion 31 is provided with a drain pipe 41 for discharging the hydraulic oil in the hydraulic oil tank 5. A drain plug 42 is fitted to the drain pipe 41.

  The outer side plate part 32 becomes a part of the side part of the machine body vehicle 1, and the outer lower plate part 32 a continuous to the bottom plate part 31 and the upper part of the outer lower plate part 32 a are connected to the outside of the hydraulic oil tank 5. The widened plate portion 32b inclined in the direction and the outer upper plate portion 32c continuous with the upper portion of the widened plate portion 32b are formed so as to be spread upward.

  Further, a step 43 for placing a foot when an operator, that is, an operator gets on and off the driver's seat 4 is fixed to the outer lower plate portion 32a by bolts 43a and 43a and protrudes in the horizontal direction. In this step 43, the tip portion is located outward from the outer upper plate portion 32c.

  The outer upper plate portion 32 c is provided with a site gauge 45 that allows the oil level of the hydraulic oil stored in the hydraulic oil tank 5 to be visible from the outside of the hydraulic oil tank 5.

  The rear side plate portion 33 is continuous substantially perpendicular to the rear end portions of the outer side plate portion 32 and the inner side plate portion 34, respectively. Further, the rear side plate portion 33 is located at the rear portion of the hydraulic oil tank 5 and is continuous with the rear lower plate portion 33a inclined rearward in the upward direction and the upper end portion of the rear lower plate portion 33a. A rear upper plate portion 33b that is further inclined rearward in the direction is formed so as to expand upward.

  The inner side plate portion 34 is located on the inner side in the width direction of the machine body vehicle 1, and the front end portion is continuous with the front side plate portion 35. Further, a hydraulic oil supply pipe 51, return pipes 52, 52, and the like are protruded from the inner side plate portion 34, respectively.

  The hydraulic oil supply pipe 51 is inserted into a mounting plate 53, inserted into a mounting hole (not shown) drilled in the center in the vertical direction and the front-rear direction of the inner plate portion 34, and is connected to the inner plate by a bolt 54 together with the mounting plate 53. It is detachably attached to the part 34. Further, the hydraulic oil supply pipe 51 has an inner end of the hydraulic oil tank 5 curved downward, and a suction strainer (not shown) for filtering the hydraulic oil is provided at this end. For this reason, the suction strainer is accommodated in a narrowed area in the lower part of the hydraulic oil tank 5. Further, the hydraulic oil supply pipe 51 is connected to the hydraulic pump at the outer end by a connection pipe (not shown).

  The return pipes 52 and 52 return the hydraulic oil supplied to the various hydraulic actuators to the hydraulic oil tank 5 and extend from the inner plate portion 34 into the hydraulic tank 5 and bend downward. Yes.

  The front side plate portion 35 is located on the front side of the machine body vehicle 1 and is connected to the front plate portion 35a continuous with the front end portion of the inner side plate portion 34 and the front end portions of the front plate portion 35a and the outer side plate portion 32. Each has a continuous inclined plate portion 35b.

  The front plate portion 35 a is provided in the width direction of the machine main body vehicle 1.

  The inclined plate portion 35b is inclined rearward from the front plate portion 35a toward the outer plate portion 32, and after the rear inclined plate portion 16b of the mudguard plate 16 of the work device vehicle 3 in a swinging state of the work device vehicle 3. It is provided at a position facing the side surface. And this inclination board part 35b inclines with respect to the front board part 35a so that it may become substantially parallel with respect to the rear-end part of the back inclination board part 16b in the maximum rocking | fluctuation state of the working apparatus vehicle 3. FIG. .

  In addition, a filler 61 as a fuel filler is projected above the position of the inclined plate portion 35b facing the rear end portion of the rear inclined plate portion 16b. That is, the filler 61 is located in the space portion 17 in a swinging state of the work equipment vehicle 3. Further, the filler 61 includes a cylindrical filler body 62 that protrudes in an upwardly inclined manner so as not to interfere with the rear inclined plate portion 16b in a swinging state of the work apparatus vehicle 3, and this filler body An inlet 63 through which the hydraulic oil can be injected is opened at the tip of 62. For this reason, the filler 61 protrudes in the direction in which the space 17 is expanded. In other words, the space 17 is expanded upward in the protruding direction of the filler body 62, which is the inclination direction of the filler 61.

  Further, the filler main body 62 is located on the base end side near the upper side of the hydraulic oil tank 5 and above the site gauge 45. As shown in FIGS. 1 and 3, the filler body 62 has a tip end portion located slightly outside the outer plate portion 32 and slightly inside the step 43. That is, the filler 61 has a tip portion located inside the vehicle width. Further, in the hydraulic oil tank 5 of the filler main body 62, a filter (not shown), a screen, or the like that prevents foreign matters from entering during refueling can be mounted.

  As shown in FIGS. 1 to 4, the inlet 63 is provided with a plug 64 that can be opened and closed. This plug 64 cannot be opened and closed by hand, but can be opened and closed by a tool. An O-ring 65 that closes the gap with the inlet 63 is fitted to the outer periphery of the plug 64.

  The top plate portion 36 is an upper side surface of the hydraulic oil tank 5 and is provided substantially parallel to the bottom plate portion 31, that is, substantially horizontal, and fitted with a breather (not shown) that releases the air in the hydraulic oil tank 5 to the outside. There are provided a breather fitting portion 66 for carrying out and an eye bolt fitting portion 67 for fitting an eye bolt (not shown) for hanging the tank.

  The fuel tank stores fuel supplied to an engine mounted on the machine body vehicle 1. The fuel tank includes an opening / closing lid that can be easily opened and closed by hand, for example.

  Next, functions and effects of the embodiment shown in FIGS. 1 to 4 will be described.

  The hydraulic oil in the hydraulic oil tank 5 is sucked out from the hydraulic oil supply pipe 51 via the suction strainer to the hydraulic pump, and is pressurized and supplied to the hydraulic motor or various hydraulic actuators by this hydraulic pump.

  At this time, this working oil supplied under pressure is controlled by a control valve to control the operation of various hydraulic cylinders, so that the work device vehicle 3 swings with respect to the machine body vehicle 1 about the swing shaft 2 as a fulcrum. Or the work device 13 performs a lift operation or a tilt operation.

  The return oil returned from the control valve to the hydraulic oil tank 5 via the return pipe 52 flows into a return filter (not shown), is filtered, and is stored again in the hydraulic oil tank 5.

  When the hydraulic oil tank 5 is replaced after a predetermined time has elapsed, the drain plug 42 is removed, the hydraulic oil is discharged from the drain pipe 41 to the outside of the hydraulic oil tank 5, and the drain plug 42 is attached again. Then, the plug 64 is opened with a tool or the like, and a watering can or a gun type oiling nozzle is inserted into the filler 61 from the inlet 63, and new hydraulic oil is injected into the hydraulic oil tank 5 from the inlet 63 to supply oil.

  At this time, the supplied hydraulic oil passes through a filter (not shown) or a screen (not shown) that can be mounted in the filler 61 and is filtered by this filter or screen, and foreign matter is prevented from entering the hydraulic oil tank 5. Is done.

  When a predetermined amount of hydraulic oil accumulates in the hydraulic oil tank 5, a plug 64 is attached to the inlet 63 and tightened with a tool.

  As described above, according to the embodiment shown in FIGS. 1 and 4, the filler 61 is moved upward at a position where the working oil tank 5 does not interfere with the working equipment vehicle 3 in the swinging state of the working equipment vehicle 3. Can be prevented from being damaged by interference with the work equipment vehicle 3, and hydraulic oil can be injected into the filler 61 from above with a watering can or a gun-type oiling nozzle. In this case, the spillage or overflow of the hydraulic oil can be suppressed, and the workability of the hydraulic oil supply can be improved.

  Further, a space portion that expands upward in the inclination direction of the filler 61 between the rear inclined plate portion 16b of the mudguard plate 16 and the inclined plate portion 35b of the hydraulic oil tank 5 in the swinging state of the work equipment vehicle 3. By forming 17, the injection port 63 of the filler 61 faces upward from the space portion 17 even in the swinging state of the work apparatus vehicle 3, and the rear inclined plate portion 16 b does not get in the way when refueling. Therefore, it is possible to easily inject the hydraulic oil, so the usability can be improved.

  Furthermore, by providing a plug 64 that can be opened and closed by a tool at the inlet 63, the hydraulic oil tank 5 and the fuel tank opening and closing lid that can be easily opened and closed by hand can be easily identified. Supplying to the oil tank 5 can be prevented.

  And the damage of the filler 61 by contact etc. can be prevented by positioning the injection port 63 of the filler 61 inside the vehicle width of the machine main body vehicle 1.

  Further, the oil level of the hydraulic oil stored in the hydraulic oil tank 5 can be easily visually confirmed from the outside by the site gauge 45, and the site gauge 45 is provided below the inlet 63 so that the site gauge 45 Can be used to prevent spilling of hydraulic oil from the inlet 63.

  In the present embodiment, the work machine is described as a wheel loader. However, the configuration of the hydraulic oil tank 5 can be applied to various work machines other than the wheel loader in which the work apparatus vehicle 3 swings with respect to the machine body vehicle 1. It is possible to apply.

1 is a perspective view showing an embodiment of a work machine according to the present invention. It is a top view which shows a working machine same as the above. (a) is a plan view of the hydraulic oil tank, (b) is a side view thereof, and (c) is a front view thereof. It is a longitudinal cross-sectional view which shows the oil filler opening body of a working machine same as the above.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Machine main body vehicle 3 Work equipment vehicle 5 Hydraulic oil tank
13 Working device
17 Space
22 Lift cylinder as a hydraulic actuator
24 Tilt cylinder as a hydraulic actuator
45 Site gauge
61 Filler as filler
63 Inlet
64 plug

Claims (4)

A machine body vehicle,
A work device vehicle comprising a work device operable by a hydraulic actuator and connected to a machine body vehicle in a swingable manner;
A hydraulic oil tank provided in a machine main body vehicle at a position facing at least a part of the working device vehicle in a swinging state of the working device vehicle and storing hydraulic oil supplied to and discharged from the hydraulic actuator;
The hydraulic oil tank
A fuel filler opening projecting upwardly at a position not interfering with the work equipment vehicle in a swinging state of the work equipment vehicle, and having an inlet opening at the tip;
A work machine comprising a plug provided at the inlet so as to be openable and closable. The work machine according to claim 1, wherein the injection port has a tip end located on an inner side of a vehicle width of the machine body vehicle. The hydraulic oil tank is provided with a site gauge that makes it possible to visually check the oil level of the hydraulic oil stored in the inside at least at a position below the injection port. Working machine. It was formed between the position of the working equipment vehicle facing the hydraulic oil tank and the working tank in the swinging state of the working equipment vehicle, and provided with a space portion that was expanded upward in the inclination direction of the oil filler opening. The work machine according to any one of claims 1 to 3.

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