JP2019051795A - Wheeled construction machine - Google Patents

Abstract

To prevent mud splashed from wheels from hitting a blade and scattering to the surroundings.SOLUTION: A wheeled hydraulic shovel 1 includes right and left front wheels 15 and right and left rear wheels 16. The shovel is provided with: right and left rear fenders 18 disposed at side plates 11B of a chassis 11 to cover an upper side of the right and left rear wheels 16; and a blade device 20 provided at a rear end plate 11E of the chassis 11. The blade device includes a blade 23 movable between an operating position and a retracted position. Right and left mud guards 27 adapted to prevent scattering of mud from the rear wheels 16 are provided between the right and left rear wheels 16 and the blade 23. The right and left mud guards 27 include respective base ends 27A and distal ends 27C in the longitudinal direction, and the base ends are attached to free ends 18D of the right and left fenders 18 and the distal ends are attached to an upper plate 23B of the blade 23.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a wheel-type construction machine such as a wheel-type hydraulic excavator having left and right front wheels and left and right rear wheels.

  A wheel-type hydraulic excavator, which is a typical example of a wheel-type construction machine, is a self-propelled lower traveling body, an upper revolving body that is mounted on the lower traveling body via a swirling wheel, and a front revolving body. And a front device provided so as to be able to move up and down.

  The lower traveling body of the wheeled hydraulic excavator includes a chassis extending in the front and rear directions, a left and right front wheel provided at the front position of the chassis, and a left provided at the rear position of the chassis, Left and right front fenders provided on the side of the chassis so as to cover the right rear wheel and the upper side of the front wheels, and left and right rear fenders provided on the side of the chassis so as to cover the upper side of the rear wheel It is comprised including.

  A soil removal device for performing soil removal work is provided on the front end surface or rear end surface of the chassis constituting the lower traveling body. This earth removal device is configured to include a earth removal plate (blade) extending in the left and right directions and an earth removal cylinder, and the earth removal plate has a work position and a road when the earth removal work is performed by the earth removal cylinder. It moves between the storage position when traveling.

  By the way, in vehicles, such as a truck, the mud guard (mudguard) is provided in the back side of the fender which covers a wheel. This mud guard is formed in a rectangular plate shape using, for example, an elastic material such as rubber, and is arranged so as to extend upward and downward on the rear side of the wheel, so that mud jumped up by the wheel during traveling can be prevented. It suppresses scattering around the wheel (see Patent Document 1). Such a mudguard is also provided on the rear side of the front fender and the rear side of the rear fender of the wheeled hydraulic excavator.

JP 2006-015789 A

  However, when a mudguard is provided on a wheel-type hydraulic excavator, the mudguard is likely to be swollen by traveling wind pressure when traveling on a road or unevenness of the ground when traveling on a work site that is not leveled. The drowned mudguard is damaged early by contacting the wheels.

  On the other hand, for example, it can be considered that the mudguard that has been drowned is prevented from coming into contact with the wheels by shortening the upper and lower lengths of the mudguard. However, when the mudguard is shortened, the mud jumped up by the wheels scatters backward through the lower end of the mudguard.

  Here, when a soil removal device is provided on the rear end surface of the chassis of the wheeled hydraulic excavator, the mud jumped backward from the rear wheel through the lower end of the mudguard collides with the soil removal plate of the soil removal device. Then, by scattering around, it adheres to, for example, the rear part of the upper swing body. As a result, there is a problem that the tail lamp device (stop light, reverse light, direction indicator light) provided at the rear of the upper swing body for the wheel-type hydraulic excavator to travel on the public road is soiled by the adhering mud.

  The present invention has been made in view of the above-described problems of the prior art, and an object of the present invention is to prevent mud splashed by a wheel from colliding with a soil discharging board and being scattered around. The object is to provide a wheel-type construction machine.

  In order to solve the above problems, the present invention provides a chassis extending in the front and rear directions, left and right front wheels provided at a front position of the chassis, and a rear position of the chassis. Left and right rear wheels, and a left side that is provided on the side surface of the chassis so as to cover the upper side of the front wheels, and a base end is attached to the chassis via a front fender attachment member, and a distal end is a free end, A right front fender and a left and right rear fender provided on the side surface of the chassis so as to cover the upper side of the rear wheel and having a base end attached to the chassis via a rear fender attachment member and a distal end being a free end And a soil removal plate that is provided on one of the front fenders and the rear surface of the rear fender and is provided at an end surface position of the chassis and extends in the left and right directions. Position and upper storage position Applied and a movable and became dumping apparatus wheeled construction machine comprising between.

  A feature of the present invention is that a mudguard that prevents mud splashing by the rear wheel is provided between the rear wheel and the earthing plate of the earthing device, and the base end of the mudguard has a lengthwise base end. It is attached to the free end side of one of the fenders, and the tip in the length direction is attached to the upper position of the earth removing plate.

  According to the present invention, the tip of the mudguard becomes a free end and does not hang down near the rear wheel, so that the tip of the mudguard can be prevented from rising due to running wind pressure, ground irregularities, and the like. Therefore, the mudguard can be prevented from coming into contact with the rear wheel and being damaged, and the life of the mudguard can be extended. Moreover, since the mudguard is bridged between the free end of one of the fenders and the upper position of the earth discharging plate, the mud guard prevents mud that has collided with the earth discharging plate from splashing upward from the lower traveling body. Can do.

It is a front view showing a wheel type hydraulic excavator applied to a first embodiment of a wheel type construction machine according to the present invention. It is a perspective view which shows the lower traveling body of a wheel type hydraulic excavator, the earth removal apparatus, etc. in the state which abbreviate | omitted one part. It is a disassembled perspective view which shows a rear fender, a part of earth discharging board, a mud guard, etc. FIG. It is a front view of the principal part expansion which shows the rear wheel in FIG. 1, a rear fender, a soil removal apparatus, a mud guard, etc. FIG. 5 is an enlarged front view similar to FIG. 4 showing the rear wheels, the rear fender, the earth removing device, the mud guard, and the like with the earth removing plate as a work position. It is a disassembled perspective view similar to FIG. 3 which shows the back fender by a 2nd Embodiment, a part of earth removing board, a magnet, a mud guard, etc. It is a disassembled perspective view similar to FIG. 3 which shows the back fender by a 3rd Embodiment, a part of earth discharging board, a hinge member, a mud guard, etc.

  Hereinafter, a wheel-type hydraulic excavator will be described as a representative example of the wheel-type construction machine according to the embodiment of the present invention, and will be described in detail with reference to FIGS. 1 to 5 show a first embodiment of the present invention.

  In FIG. 1, a wheel-type hydraulic excavator 1 includes a self-propelled wheel-type lower traveling body 2 having left and right front wheels 15 and left and right rear wheels 16, which will be described later, and a lower portion via a turning wheel 3. The upper revolving body 4 is mounted on the traveling body 2 so as to be able to turn, and the front device 5 is provided on the front side of the upper revolving body 4 so as to be able to move up and down. The front device 5 includes a boom 5A, an arm 5B, a bucket 5C, a boom cylinder 5D, an arm cylinder 5E, a bucket cylinder 5F, and the like, and performs soil excavation work and the like.

  The upper turning body 4 has a turning frame 6 that is attached to a chassis 11 (described later) via a turning wheel 3 so as to be turnable. The swivel frame 6 serves as a base of the upper swivel body 4 and is formed as a strong support structure. A cab 7 defining a cab is provided on the left front side of the swivel frame 6, and a counterweight 8 that balances the weight with the front device 5 is provided on the rear end side of the swivel frame 6.

  A tail lamp device 9 necessary for the wheel-type hydraulic excavator 1 to travel on a public road is provided below the counterweight 8 on the left and right sides. The tail lamp device 9 includes, for example, a stop lamp (stop lamp), a backup lamp (reverse lamp), a turn signal lamp (direction indicator lamp), and the like. In addition, an engine for driving a hydraulic pump is provided on the front side of the counterweight 8, and mounted devices (none of which are shown) such as the engine and the hydraulic pump are covered with an exterior cover 10.

  Next, the chassis 11, the left and right front wheels 15, the left and right rear wheels 16, the left and right front fenders 17, the left and right rear fenders 18 constituting the lower traveling body 2 of the wheeled excavator 1 are illustrated. Will be described.

  The chassis 11 constitutes the base of the lower traveling body 2. The chassis 11 is disposed between an upper surface plate 11A extending horizontally in the front and rear directions, a lower surface plate (not shown) facing the upper surface plate 11A in the upper and lower directions, and the upper surface plate 11A and the lower surface plate. , A box structure having a rectangular cross section surrounded by left and right side plates 11B (only left side shown) facing in the right direction. A large-diameter cylindrical round cylinder 11C is provided at the center of the front plate 11A in the front and rear direction (length direction), and the swiveling wheel 3 is mounted on the round cylinder 11C.

  A rectangular front end face plate 11 </ b> D extending in a direction orthogonal to the length direction of the chassis 11 is provided at the front end of the chassis 11, and the front end face plate 11 </ b> D is an end face position on the front side of the chassis 11. A rectangular rear end face plate 11E facing the front end face plate 11D in the front and rear directions is provided at the rear end of the chassis 11, and the rear end face plate 11E is an end face position on the rear side of the chassis 11. For example, a bucket holder 12 is attached to the front end face plate 11D of the chassis 11 (see FIG. 1). The bucket holder 12 holds the bucket 5C of the front device 5 when the wheeled hydraulic excavator 1 travels. On the other hand, the rear end face plate 11E of the chassis 11 is provided with a soil removal device 20 described later.

  A front fender mounting member 11F and a rear fender mounting member 11G are provided on the left and right side plates 11B of the chassis 11 so as to be separated from each other in the front and rear directions (only the left side is shown). The front fender attachment member 11F is disposed on the front side (front end face plate 11D side) with respect to the central portion in the length direction of the side plate 11B, and a front fender 17 described later is attached thereto. The front fender mounting member 11F is made of a plate body having left and right width dimensions equivalent to those of the front wheel 15, and is attached to the side plate 11B of the chassis 11 using bolts or the like, and is inclined from the front end toward the rear end. It protrudes outward from the side plate 11B while inclining downward.

  The rear fender attachment member 11G is disposed on the rear side (rear end face plate 11E side) with respect to the central portion in the length direction of the side face plate 11B, and a later-described rear fender 18 is attached. The rear fender mounting member 11G is composed of a plate body having left and right width dimensions equivalent to those of the rear wheel 16, and is attached to the side plate 11B of the chassis 11 using bolts or the like, obliquely from the rear end toward the front end. It protrudes outward from the side plate 11B while inclining downward.

  A getting-on / off step 13 and a tool box 14 are provided between the front fender mounting member 11F and the rear fender mounting member 11G. The getting-on / off step 13 forms a scaffold when the operator gets on and off between the cab 7 (upper turning body 4) and the ground. The tool box 14 is formed of a box extending in the front and rear directions between the front fender mounting member 11F and the rear fender mounting member 11G, and accommodates tools.

  The left and right front wheels 15 are provided at a front position near the front end face plate 11 </ b> D of the chassis 11. That is, the left and right front wheels 15 are attached to the front end of a front axle (not shown) that extends in the left and right directions on the front side of the chassis 11. The left and right rear wheels 16 are provided at rear positions in the vicinity of the rear end face plate 11E of the chassis 11. That is, the left and right rear wheels 16 are attached to the front end of a rear axle (not shown) that extends in the left and right directions on the rear side of the chassis 11. The left and right front wheels 15 and the left and right rear wheels 16 are rotationally driven (four-wheel drive) using a hydraulic motor (not shown) mounted on the chassis 11 as a power source. Further, the left and right front wheels 15 are steered in response to a rotation operation of a handle (not shown) provided in the cab 7.

  The left and right front fenders 17 are provided on the left and right side plates 11B of the chassis 11 so as to cover the upper sides of the left and right front wheels 15 (only the left side is shown). The front fender 17 is attached to the side plate 11B of the chassis 11 and the front fender attachment member 11F, and projects forward from the front end of the front fender attachment member 11F (see FIG. 1). The front fender 17 is composed of a plate body having left and right width dimensions equivalent to those of the front wheel 15, and a base end 17A of the front fender 17 is a fixed end fixed to the chassis 11 via a front fender mounting member 11F. Thus, the front end of the front fender 17 is a free end 17B. The front fender 17 and the front fender mounting member 11F cover the range from the upper side to the rear side of the front wheel 15 in a state of protruding outward from the side plate 11B, so that the mud jumped up by the front wheel 15 gets on and off the step 13 , To prevent scattering in the tool box 14 or the like.

  The left and right rear fenders 18 are provided on the left and right side plates 11B of the chassis 11 so as to cover the upper sides of the left and right rear wheels 16, respectively. The rear fender 18 is attached to the side plate 11B and the rear fender attachment member 11G of the chassis 11, and projects rearward from the rear end of the rear fender attachment member 11G. As shown in FIGS. 2 and 3, the rear fender 18 is composed of a plate body having left and right width dimensions equivalent to those of the rear wheel 16, and includes a horizontal plate portion 18A extending horizontally in the front and rear directions, An inclined plate portion 18 </ b> B extending rearward while being inclined downward from the rear end of the plate portion 18 </ b> A is configured.

  A base end 18 </ b> C of the rear fender 18 (horizontal plate portion 18 </ b> A) is a fixed end fixed to the rear fender mounting member 11 </ b> G using a plurality of bolts 19. The front end of the rear fender 18 (inclined plate portion 18B) is a free end 18D, and a plurality of (for example, three) female screw holes 18E using back nuts or the like are provided on the free end 18D side of the rear fender 18 to be described later. The mudguard mounting plate 25 is attached. The rear fender 18 and the rear fender mounting member 11G cover the area extending from the front to the upper side of the rear wheel 16 in a state of protruding outward from the side plate 11B, so that the mud jumped up by the rear wheel 16 is upper. It suppresses scattering to the revolving body 4 or the like.

  Next, the earth removal apparatus 20 provided in the lower traveling body 2 of the wheel hydraulic excavator 1 will be described.

  The earth removing device 20 is provided on the rear end face plate 11E of the chassis 11 so as to be positioned on the left and right rear fender 18 side. The earth removal device 20 includes a link mechanism 21, which will be described later, an earth removal plate 23, and an earth removal cylinder (not shown). Using the earth removal plate 23, earth removal work, leveling work, and the like. Is to do. The earth removal device 20 is generally arranged on the front side in the traveling direction by inverting the upper swing body 4 forward and backward when performing earth removal work or the like.

  The link mechanism 21 of the earth removing device 20 is provided between the rear end face plate 11E of the chassis 11 and the earth removing plate 23. The link mechanism 21 is attached to the rear end face plate 11E of the chassis 11 and extends upward and downward. The chassis side bracket 21A is attached to the earth discharge plate 23 and extends upward and downward. Left and right upper ends, one end of which is pivotally connected to the lower intermediate portion of the chassis side bracket 21A and the other end of the other end is pivotally connected to the upper portion of the earth discharging plate side bracket 21B. A link 21C (only the left side is shown) and a lower side of each upper link 21C, one end of which is pivotally connected to the lower portion of the chassis side bracket 21A and the other end of the earth removing plate side bracket 21B. It includes left and right lower links 21D (only the left side is shown) that are pivotally connected to the lower part. Each upper link 21C and each lower link 21D of the link mechanism 21 constitutes a parallel link.

  One end side (for example, the bottom side) of a soil discharge cylinder (not shown) made of a hydraulic cylinder is rotatably coupled to the upper portion of the chassis side bracket 21A constituting the link mechanism 21. An end side (for example, the rod side) is rotatably coupled to each lower link 21D. Therefore, by extending and retracting the earth removal cylinder, the other ends of the upper links 21C and the lower links 21D constituting the parallel links are rotated upward and downward, and the earth removal plate side bracket 21B is substantially in contact with the ground. It is configured to move up and down together with the earth removal plate 23 while maintaining a vertical posture. A soil removal device cover 22 is provided above the link mechanism 21, and the soil removal device cover 22 covers the link mechanism 21 and the soil discharge cylinder from above.

  The earth removing plate 23 is attached to the rear fender attachment member 11G of the chassis 11 via the link mechanism 21. The earth removal plate 23 is formed in a rectangular plate shape that is long in the left and right directions and rises up and down. The link mechanism 21 moves up and down in accordance with the expansion and contraction operation of the earth removal cylinder. . In other words, the earth removal plate 23 has a work position (position shown in FIG. 5) arranged on the lower side for performing earth removal work and leveling work, and a storage position arranged on the upper side for traveling on the road. (Position of FIG. 4).

  Here, the earth removing plate 23 includes a rectangular flat plate bottom plate 23A extending in the left and right directions, a rectangular flat plate upper plate 23B facing the bottom plate 23A in an upward and downward direction, and an upward and downward direction. The top plate 23C is made of a plate that is long in the left and right directions and is fixed to the rear ends of the bottom plate 23A and the top plate 23B, and the bottom plate 23A and the front plate 23C in a state of facing the front plate 23C in the front and rear directions. A back plate 23D fixed to the front end of the upper plate 23B and to which the earth removing plate side bracket 21B of the link mechanism 21 is attached, and left and right side end portions of the bottom plate 23A, the upper plate 23B, the front plate 23C and the back plate 23D. The left and right side plates 23E and 23F are fixed to each other and extend downward.

  Here, a plurality of (for example, four) engaging members 24 made of a plate bent in an L-shaped cross section are provided on the upper plate 23B of the earth discharging plate 23 so as to protrude upward from the upper plate 23B. Yes. Each of the engaging members 24 is provided in a pair in the left and right directions at a position close to the left side plate 23E side of the upper plate 23B, and at a position close to the right side plate 23F side of the upper plate 23B. Two pairs are provided in the left and right directions. Each of the engaging members 24 has a fixing portion 24A fixed to the upper plate 23B by means of welding or the like, and a bent portion 24B bent backward from the upper end of the fixing portion 24A. The bent portion 24B of each engagement member 24 is engaged with an engagement hole 27D of the mud guard 27 described later.

  Next, the left and right mudguard mounting plates 25 provided at the free ends 18D of the left and right rear fenders 18 and the left and right left guards provided between the left and right rear wheels 16 and the earth discharging plate 23 are provided. The mud guard 27 will be described.

  The left and right mudguard mounting plates 25 are provided at the free ends 18D of the left and right rear fenders 18, respectively. The left and right mudguard mounting plates 25 have the same shape. As shown in FIG. 3, the mudguard mounting plate 25 is formed of a rectangular plate body extending in the left and right directions with a length dimension equivalent to the width dimension in the left and right directions of the rear fender 18.

  Here, the mudguard mounting plate 25 is inclined to the inclined plate portion 18B attached to the inclined plate portion 18B of the rear fender 18, and the bent plate portion 25B to which the mudguard 27 is attached is bent downward vertically from the lower end of the inclined plate portion 25A. It is comprised by. The inclined plate portion 25A is provided with a plurality of (for example, three) bolt insertion holes 25C corresponding to the respective female screw holes 18E of the rear fender 18, and the bolts 26 inserted into the respective bolt insertion holes 25C are connected to the respective female screw holes of the rear fender 18. The mudguard mounting plate 25 is attached to the free end 18D of the rear fender 18 by being screwed to 18E. Further, a plurality (for example, three) of female screw holes 25D formed using a back nut or the like are formed in the bent plate portion 25B at intervals in the left and right directions.

  The left and right mud guards 27 are provided between the left and right rear wheels 16 and the earth discharging plate 23, respectively. The left and right mud guards 27 prevent mud splashed by the rear wheel 16 during traveling of the wheeled hydraulic excavator 1 from being scattered to the upper swing body 4 side. The left and right mud guards 27 have the same shape, and the left mud guard 27 is provided between the free end 18D of the left rear fender 18 and the upper plate 23B (portion on the left plate 23E side) of the soil discharge plate 23. The right mudguard 27 is provided between the free end 18D of the right rear fender 18 and the upper plate 23B (portion on the right plate 23F side) of the soil discharge plate 23.

  As shown in FIG. 3, the mud guard 27 is formed of a flexible resin sheet formed using a resin material such as rubber. The mud guard 27 has a width dimension equivalent to the width dimension in the left and right directions of the rear fender 18 and is formed in a rectangular flat plate shape having a long front and rear directions. A plurality of (for example, three) bolt insertion holes 27 </ b> B corresponding to the female screw holes 25 </ b> D of the mudguard mounting plate 25 are formed at the base end 27 </ b> A in the length direction (front and rear directions) of the mudguard 27. On the other hand, a pair of engagement holes 27 </ b> D are provided at the distal end 27 </ b> C in the length direction of the mud guard 27 with a spacing in the left and right directions. The pair of engagement holes 27 </ b> D are rectangular long holes extending in the left and right directions, and engage with a pair of engagement members 24 provided on the upper plate 23 </ b> B of the earth discharging plate 23.

  The presser plate 28 is attached to the mudguard mounting plate 25 with the base end 27 </ b> A of the mudguard 27 interposed therebetween. The presser plate 28 is formed of a rectangular plate body having a length dimension and a width dimension equivalent to the bent plate portion 25B of the mudguard mounting plate 25. A plurality (for example, three) of bolt insertion holes 28 </ b> A corresponding to the female screw holes 25 </ b> D of the mudguard mounting plate 25 are formed in the presser plate 28.

  Therefore, the base end 27A of the mud guard 27 is bent by the mud guard mounting plate 25 by screwing the bolts 29 inserted through the bolt insertion holes 28A of the holding plate 28 into the female screw holes 25D of the mud guard mounting plate 25. It is clamped between the plate portion 25 </ b> B and the presser plate 28. On the other hand, by engaging each engagement hole 27D formed in the distal end 27C of the mud guard 27 with a bent portion 24B of each engagement member 24 provided in the upper plate 23B of the soil discharging plate 23, the distal end of the mud guard 27 27C is detachably attached to the upper position of the earth discharging plate 23 in a state of being movable upward and downward.

  Thereby, even if the earth removal board 23 moves up and down between the work position shown in FIG. 5 and the storage position shown in FIG. 4, the mudguard 27 is connected to the free end 18D of the rear fender 18 and the earth removal. It follows the displacement of the earth removing plate 23 while being bent and deformed with the upper plate 23B of the plate 23. Thus, the gap between the free end 18D of the rear fender 18 and the earth discharging plate 23 is always closed by the mud guard 27 spanned between them.

  In this case, if the tip 27C of the mud guard 27 is attached to the upper plate 23B of the earth discharging plate 23 using bolts, both the base end 27A of the mud guard 27 and both ends of the tip 27C are fixed using bolts. Will be. In this case, when the earth removal plate 23 moves between the working position and the storage position and the proximal end 27A and the distal end 27C of the mud guard 27 approach each other, the mud guard 27 is hardly bent and deformed, and the mud guard 27 is damaged. It becomes easy to do. On the other hand, in the first embodiment, the engagement hole 27D provided at the distal end 27C of the mud guard 27 is engaged with the engagement member 24 provided on the upper plate 23B of the soil discharge plate 23, whereby the mud guard 27 The tip 27C is attached to the upper plate 23B of the earth discharging plate 23 with moderate play in the upward and downward directions. Thereby, when the base end 27A and the front-end | tip 27C of the mud guard 27 approach, the mud guard 27 is devised so that it can bend flexibly and deform.

  The wheeled hydraulic excavator 1 according to the first embodiment has the above-described configuration, and the operation thereof will be described below.

  The wheeled excavator 1 drives left and right front wheels 15 and left and right rear wheels 16 by a hydraulic motor (not shown), and left and right front wheels by a handle (not shown) in the cab 7. By steering the wheel 15, it is possible to travel on a public road toward the work site. In this case, the earth removal plate 23 of the earth removal device 20 is held in the retracted position shown in FIG. 4, and the gap formed between the free end 18D of the rear fender 18 and the earth removal plate 23 is moved upward by the mud guard 27. Can be closed (covered).

  For this reason, even if the mud jumped up by the rear wheel 16 rebounds toward the upper swing body 4 by colliding with the earth discharging plate 23, the rebound mud remains at the free end 18D of the rear fender 18. It collides with a mudguard 27 that closes the gap between the earthing plate 23 and the earth discharge plate 23. As a result, it is possible to suppress the mud that has collided with the earth discharging plate 23 from splashing toward the upper swing body 4 and the tail lamp device 9 provided on the counterweight 8 is contaminated by the mud. Can be reliably prevented, and the visibility of the tail lamp device 9 can be kept good.

  Moreover, since the tip 27C of the mud guard 27 is attached to the upper plate 23B of the earth discharging plate 23, the tip 27C of the mud guard 27 does not hang down to the rear side of the rear wheel 16 as a free end. Therefore, it is possible to suppress the tip 27C of the mud guard 27 from rolling and coming into contact with the rear wheel 16 due to the traveling wind pressure when the wheeled hydraulic excavator 1 travels. As a result, the life of the mudguard 27 can be extended, and the effect of preventing mud from adhering to the tail lamp device 9 or the like can be maintained for a long period of time.

  On the other hand, when the wheeled excavator 1 performs earth removal work, leveling work, etc. at the work site, the earth removal plate 23 of the earth removal device 20 is moved from the storage position shown in FIG. 4 to the work position shown in FIG. In this state, the wheeled excavator 1 travels on the work site. In this case, the earth removing plate 23 of the earth removing device 20 is held at the working position, and the gap formed between the free end 18D of the rear fender 18 and the earth removing plate 23 is closed (covered) by the mud guard 27. )be able to.

  Accordingly, even when the earth removal plate 23 is held at the work position, the mud that is jumped up by the rear wheel 16 and collides with the earth removal plate 23 and bounces back to the upper swing body 4 side of the rear fender 18. It collides with a mudguard 27 that closes the gap between the free end 18D and the earth discharging plate 23. As a result, it is possible to suppress the mud that has collided with the earth discharging plate 23 and bounced back toward the upper swing body 4, and mud contamination of the tail lamp device 9 can be prevented. In addition, since the tip 27C of the mud guard 27 does not bend due to unevenness or the like at the work site, the mud guard 27 can be prevented from coming into contact with the rear wheel 16, and its life can be extended.

  In addition, an engagement hole 27D is provided at the distal end 27C of the mud guard 27, and the engagement hole 27D is engaged with an engagement member 34 provided on the upper plate 23B of the earth discharging plate 23, whereby the distal end 27C of the mud guard 27 is engaged. Are attached to the upper plate 23B of the earth discharging plate 23 in a state of being movable upward and downward. Thereby, when the base end 27A and the front end 27C of the mud guard 27 approach each other, the mud guard 27 can be smoothly bent and deformed, and the durability of the mud guard 27 can be improved.

  Thus, the wheeled excavator 1 according to the first embodiment includes the left and right rear fenders 18 provided on the side plate 11B of the chassis 11 so as to cover the upper sides of the left and right rear wheels 16, and the chassis 11. The rear end face plate 11E includes a soil removal device 20 having a soil removal plate 23 movable between the work position shown in FIG. 5 and the storage position shown in FIG. The left and right mud guards 27 are provided between the rear and the earth discharging plates 23 to prevent mud splashing by the rear wheels 16. The left and right mud guards 27 are attached to the free ends 18D of the left and right rear fenders 18 at the base ends 27A in the length direction, and the top ends 27C in the length direction are attached to the upper plate 23B of the earth discharging plate 23. It has been.

  Thereby, even if the mud jumped up by the rear wheel 16 bounces toward the upper swing body 4 by colliding with the earth discharging plate 23, the boiled mud is free end 18D of the rear fender 18. And the mudguard 27 attached to the upper plate 23B of the earth discharging plate 23. As a result, it is possible to prevent the mud that has collided with the earth discharging plate 23 from splashing toward the upper swing body 4 and to prevent the tail lamp device 9 and the like provided on the counterweight 8 from being contaminated by the mud. Can do.

  In addition, since the tip 27C of the mud guard 27 becomes a free end and does not hang down to the rear side of the rear wheel 16, the mud guard 27 is caused by traveling wind pressure when the wheeled hydraulic excavator 1 travels or unevenness of the ground at the work site. It can suppress that the front-end | tip 27C of is curled. As a result, the mud guard 27 can be prevented from being damaged by coming into contact with the rear wheel 16, and the life of the mud guard 27 can be extended.

  The left and right mud guards 27 are formed as a rectangular resin sheet having flexibility. Thereby, the earth removal board 23 can follow the displacement of the earth removal board 23 smoothly, bending and deforming between a working position (position of FIG. 5) and a storage position (position of FIG. 4).

  Furthermore, an engagement hole 27D is provided at the tip 27C of the left and right mud guards 27, and an engagement member 24 is provided on the upper plate 23B of the soil discharge plate 23. Therefore, by engaging the engagement hole 27D of the mud guard 27 with the engagement member 24 of the earth discharging plate 23, the tip 27C of the mud guard 27 is attached to the upper plate 23B of the earth discharging plate 23 in a detachable state. It has been. Thereby, the front end 27C of the mud guard 27 can be easily attached to the upper plate 23B of the earth discharging plate 23, and the workability thereof can be improved.

  Next, FIG. 6 shows a second embodiment of the present invention. The feature of this embodiment is that the tips of the left and right mud guards are attached to the earth discharging plate using magnets. In the second embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted. Since the left and right mud guards have the same configuration, the left mud guard will be described below, and the description on the right side will be omitted.

  In the figure, a soil discharge plate 30 is used in the second embodiment in place of the soil discharge plate 23 according to the first embodiment. This earth removal board 30 is the same as the earth removal board 23 according to the first embodiment, such as a bottom board (not shown), an upper board 30A, a front board 30B, a back board 30C, a left board 30D, and a right board (not shown). Z). However, the earth removal board 30 is different from the earth removal board 23 according to the first embodiment in that the engagement member 24 used in the first embodiment is not provided on the upper board 30A. .

  The mudguard 31 is used in the second embodiment in place of the mudguard 27 according to the first embodiment. Similar to the mudguard 27 according to the first embodiment, the mudguard 31 is made of a flexible resin sheet formed using a resin material such as rubber, and has a width dimension in the left and right directions of the rear fender 18. It has the same width dimension and is formed in a rectangular flat plate shape with long front and rear directions. Here, a plurality of (for example, three) bolt insertion holes 31 </ b> B corresponding to the female screw holes 25 </ b> D of the mudguard mounting plate 25 are formed at the base end 31 </ b> A in the longitudinal direction of the mudguard 31. On the other hand, a magnet 32 (described later) is attached to the longitudinal end 31C of the mud guard 31.

  The magnet 32 is provided at the tip 31C of the mudguard 31 and attaches the tip 31C of the mudguard 31 to the upper plate 30A of the soil removal board 30. Here, the magnet 32 is made of, for example, a permanent magnet, and is formed in a rectangular parallelepiped rod shape having a length dimension equivalent to the width dimension of the mudguard 31 in the left and right directions. The magnet 32 is fixed to the tip 31C of the mudguard 31 using, for example, an adhesive.

  Accordingly, the magnet 32 fixed to the distal end 31C of the mudguard 31 is attached to the mudguard mounting plate 25 fixed to the free end 18D of the rear fender 18 with the bolts 29 attached to the mudguard 31. The tip 31C of the mudguard 31 can be detachably attached to the upper plate 30A of the earth discharging plate 30 by adsorbing the upper plate 30A to the upper plate 30A. Thus, the left and right mudguards 31 can be easily attached between the free ends 18D of the left and right rear fenders 18 and the upper plate 30A of the earth discharging plate 30.

  The wheeled hydraulic excavator according to the second embodiment has the mudguard 31 as described above, and there is no particular difference in the basic operation from the mudguard 27 according to the first embodiment. However, in the second embodiment, the tip 31C of the mudguard 31 can be attached to the upper plate 30A of the earth removing plate 30 using the attractive force of the magnet 32. Thereby, workability | operativity when attaching the left and right mudguard 31 between the free end 18D of the left and right rear fenders 18 and the upper plate 30A of the earth discharging plate 30 can be improved. Moreover, since it is not necessary to provide the engaging member 24 used in the first embodiment on the upper plate 30A of the earth removing plate 30, the structure of the earth removing plate 30 can be simplified and the manufacturing cost can be reduced. Can also contribute.

  Next, FIG. 7 shows a third embodiment of the present invention. The feature of this embodiment is that the tips of the left and right mud guards are attached to the earth discharging plate using hinge members. Note that in the third embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and description thereof is omitted. Since the left and right mudguards and hinge members have the same configuration, the left mudguard and hinge members will be described below, and the description of the right side will be omitted.

  In the figure, a soil discharge plate 33 is used in the third embodiment in place of the soil discharge plate 23 according to the first embodiment. As with the soil discharge plate 23 according to the first embodiment, the soil discharge plate 33 includes a bottom plate (not shown), an upper plate 33A, a front plate 33B, a back plate 33C, a left side plate 33D, and a right side plate (not shown). Z). However, according to the first embodiment, the upper plate 33A of the earth removing plate 33 is provided with a hinge member 34, which will be described later, instead of the engagement member 24 used in the first embodiment. It is different from the earth discharging plate 23.

  The pair (two pieces) of hinge members 34 are provided in the left plate 33D side of the upper plate 33A of the earth removal plate 33 so as to be spaced apart in the left and right directions. Each hinge member 34 attaches a tip 35C of a mud guard 35, which will be described later, to the upper plate 33A of the earth discharging plate 33 so as to be rotatable upward and downward. Here, each hinge member 34 is fixed to the upper plate 33A of the earth discharging plate 33 using bolts 34A, and pivots upward and downward about the support shaft 34C with respect to the fixed plate 34B. The rotation plate 34D is made possible. The rotating plate 34D of the hinge member 34 is provided with, for example, two stud bolts 34E that protrude upward from the rotating plate 34D.

  The mud guard 35 is used in the third embodiment in place of the mud guard 27 according to the first embodiment. Similar to the mud guard 27 according to the first embodiment, the mud guard 35 is made of a flexible resin sheet formed using a resin material such as rubber, and has a width dimension in the left and right directions of the rear fender 18. It has the same width dimension and is formed in a rectangular flat plate shape with long front and rear directions. Here, a plurality of (for example, three) bolt insertion holes 35 </ b> B corresponding to the respective female screw holes 25 </ b> D of the mudguard mounting plate 25 are formed at the base end 35 </ b> A in the longitudinal direction of the mudguard 35. Accordingly, the bolt 29 inserted into each bolt insertion hole 35B is screwed into the female screw hole 25D of the mud guard mounting plate 25 fixed to the free end 18D of the rear fender 18, whereby the base end 35A of the mud guard 35 is connected to the rear fender 18. Is attached to the free end 18D. On the other hand, four stud bolt insertion holes 35 </ b> D through which a total of four stud bolts 34 </ b> E provided in the pair of hinge members 34 are inserted are provided at the longitudinal end 35 </ b> C of the mud guard 35.

  The holding plate 36 is attached to the rotating plate 34 </ b> D of each hinge member 34 with the tip 35 </ b> C of the mud guard 35 interposed therebetween. The presser plate 36 is formed of a rectangular plate having a length dimension equivalent to the width dimension (left and right dimension) of the mud guard 35. The holding plate 36 is formed with four stud bolt insertion holes 36 </ b> A corresponding to the stud bolt insertion holes 35 </ b> D of the mud guard 35.

  Therefore, the nut 37 is screwed to each stud bolt 34E in a state where the stud bolt 34E of each hinge member 34 is inserted into each stud bolt insertion hole 35D of the mud guard 35 and each stud bolt insertion hole 36A of the holding plate 36. Thus, the tip 35 </ b> C of the mud guard 35 is sandwiched between the rotating plate 34 </ b> D of the pair of hinge members 34 and the presser plate 36. As a result, the tip 35C of the mud guard 35 is attached to the upper plate 33A of the earth removing plate 33 via the pair of hinge members 34 so as to be rotatable upward and downward. Thereby, even if the base end 35A and the tip 35C of the mud guard 35 approach while the earth removal plate 33 moves between the work position and the storage position, the tip 35C of the mud guard 35 is moved up and down by the hinge member 34. By turning in the direction, the mud guard 35 can be smoothly bent and deformed.

  The wheel-type hydraulic excavator according to the third embodiment has the mud guard 35 as described above, and the basic operation is not different from the mud guard 27 according to the first embodiment. However, in the third embodiment, the tip 35C of the mud guard 35 can be attached to the upper plate 33A of the earth removing plate 33 so as to be rotatable upward and downward using the hinge member 34. Thereby, even if the base end 35A and the tip 35C of the mud guard 35 approach while the earth removal plate 33 moves between the work position and the storage position, the tip 35C of the mud guard 35 is moved up and down by the hinge member 34. By rotating in the direction, the mudguard 35 can bend and deform smoothly. As a result, the durability of the mudguard 35 can be increased, and the effect of preventing mud from adhering to the tail lamp device 9 or the like can be maintained for a long period of time.

  In the first embodiment, a case where the mud guard mounting plate 25 is attached to the free end 18D of the rear fender 18 and the base end 27A of the mud guard 27 is attached to the mud guard mounting plate 25 is illustrated. However, the present invention is not limited to this. For example, the base end 27 </ b> A of the mudguard 27 may be directly attached to the free end 18 </ b> D of the rear fender 18. The same applies to the second and third embodiments.

  In 1st Embodiment, the case where the front-end | tip 27C of the mud guard 27 is attached to the upper board 23B of the earth discharging board 23 is illustrated. However, the present invention is not limited to this. For example, the tip of the mud guard 27 may be attached to the upper portion of the back plate 23D that constitutes the earth discharging plate 23. The same applies to the second and third embodiments.

  In 2nd Embodiment, the case where the magnet 32 was fixed to the front-end | tip 31C of the mudguard 31 using the adhesive agent is illustrated. However, the present invention is not limited to this. For example, the magnet 32 may be attached using a bolt, a nut, or the like.

  In the third embodiment, the case where two hinge members 34 are provided between the upper plate 33A of the earth discharging plate 33 and the tip 35C of the mud guard 35 is illustrated. However, the present invention is not limited to this. For example, the tip 35C of the mud guard 35 may be attached to the earth discharging plate 33 using one or three or more hinge members.

  In the third embodiment, a stud bolt 34E is provided on the rotating plate 34D of the hinge member 34, and the tip 35C of the mud guard 35 is attached to the rotating plate 34D of the hinge member 34 by a nut 37 screwed to the stud bolt 34E. The case where it attaches is illustrated. However, the present invention is not limited to this. For example, a bolt insertion hole is formed in the rotating plate 34D of the hinge member 34, and the tip 35C of the mud guard 35 is attached to the hinge member 34 by using the bolt inserted into the bolt insertion hole. It is good also as a structure attached to rotation board 34D.

  Furthermore, in the embodiment, the case where the earth removal device 20 is provided on the rear end face plate 11E of the chassis 11 and the mud guard 27 is provided between the rear fender 18 and the earth removal plate 23 of the earth removal device 20 is illustrated. . However, the present invention is not limited to this. For example, the earth removing device 20 may be provided on the front end face plate 11D of the chassis 11 and a mud guard may be provided between the front fender 17 and the earth removing plate 23 of the earth removing device 20.

1 Wheel excavator (Wheeled construction machine)
11 Chassis 15 Front wheel 16 Rear wheel 17 Front fender 17A, 18C Base end 17B, 18D Free end 18 Rear fender 20 Earth removal device 23, 30, 33 Earth removal plate 27, 31, 35 Mud guard 27A, 31A, 35A Base end 27C , 31C, 35C Tip 34 Hinge member

Claims (4)

A chassis extending in the front and rear directions, left and right front wheels provided at the front position of the chassis, left and right rear wheels provided at the rear position of the chassis, and the front Left and right front fenders, which are provided on the side surface of the chassis so as to cover the upper side of the wheel and the base end is attached to the chassis via a front fender attachment member and the front end is a free end, and the upper side of the rear wheel are Left and right rear fenders, which are provided on the side surface of the chassis so as to cover and have base ends attached to the chassis via rear fender attachment members and leading ends become free ends, the front fenders, and the rear fenders, The earth removal plate, which is located at the end face position of the chassis and located on the fender side of either of these, extends left and right, and can be moved between the lower working position and the upper storage position by the earth removal cylinder With the earth removal device In the wheel-type construction machine which is equipped with,
A mudguard that prevents mud splashing by the rear wheel is provided between the rear wheel and the earth removing plate of the earth removing device,
The mud guard has a base end in the length direction attached to the free end side of the one fender, and a wheel type construction machine characterized in that the tip end in the length direction is attached to an upper position of the earth removing plate. .   The wheel type construction machine according to claim 1, wherein the mudguard is formed as a rectangular resin sheet having flexibility.   The wheel type construction machine according to claim 1, wherein a tip of the mud guard in the length direction is attached in a detachable manner with respect to an upper position of the earth discharging plate.   The wheel type construction according to claim 1, wherein a tip of the mud guard in the length direction is attached to an upper position of the earth discharging plate so as to be rotatable upward and downward using a hinge member. machine.

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