JP4101849B2 - Swivel work machine - Google Patents

Description

  The present invention relates to a turning work machine such as a backhoe, and more particularly to a turning work machine having a cabin mounted on a turntable.

A swivel work machine such as a backhoe has an engine, a radiator, etc. disposed at the rear of the swivel and covered with a bonnet, and a driver's seat, control lever, etc. are disposed on the front side of this bonnet. The seat or the like is covered with a canopy or surrounded by a cabin.
As a swivel working machine equipped with a cabin, there is one disclosed in the following Patent Document 1, and in this technology, when a cabin is mounted on a swivel, the bonnet is brought into contact with the inside of the exterior panel of the cabin. A sealing material is provided, and the appearance is not impaired by covering the sealing material with the exterior panel.
JP-A-8-302739

According to the technique of the above-mentioned Patent Document 1, the exterior panel on the cabin side is disposed so as to overlap the left and right side surfaces of the bonnet, and a mounting plate protruding toward the side surface of the bonnet is provided inside the exterior panel, and the hood is attached to the mounting plate. The sealing material which contact | abuts to a side surface was provided. For this reason, although the sealing material is covered from the left and right outer sides by the exterior panel, if water enters the gap between the exterior panel and the side surface of the bonnet, it will be directly applied to the sealing material, and there will be a slight gap between the sealing material and the side surface of the bonnet. However, there was a risk of flooding if a gap was formed.
In particular, since the bonnet of a swivel work machine has a rounded curved surface as a whole, the gap between the bonnet and the side surface of the bonnet becomes non-uniform unless the mounting plate is accurately formed to match the curved surface. It also had an adverse effect on the sealing performance of the sealing material to be filled.

On the other hand, in this type of swivel work machine, the cabin is often treated as an option, and is often retrofitted instead of the canopy, so the bonnet shape is taken into consideration in the initial design stage regarding the installation of the cabin. However, when the cabin was mounted, the shape of the cabin side had to be matched to the bonnet.
Since the cabin is usually formed in a substantially rectangular parallelepiped box shape, the outer shape becomes discontinuous at the boundary with the curved shape of the rounded bonnet, and the cabin is formed so as to fill the gap generated at the discontinuous portion. Measures such as partial addition of exterior panels are necessary, which is disadvantageous in terms of cost. Further, since the boundary surface (mating surface) between the cabin and the bonnet is a curved surface, it has been difficult to provide a reliable seal therebetween.

In view of the above circumstances, an object of the present invention is to suitably improve the sealing performance between a hood and a cabin.
Another object of the present invention is to obtain a continuous appearance between the hood and the cabin with a simple configuration.

Means for solving the problems in the present invention are as follows.
First, a swivel base 4 is provided on the traveling device 3 so as to be rotatable about an axis X in the vertical direction, a bonnet 15 is provided on the rear part of the swivel base 4, and a cabin 21 is provided on the front part. 15 has a front cover 45 on which the rear lower portion of the cabin 21 is mounted, a rear cover 46 that can be opened and closed, and a side cover 47 between them.
A curved plate portion 47B is formed at the rear portion of the side cover 47 along the side surface shape of the rear cover 46, and projects outward from the curved plate portion 47B at the front portion of the side cover 47 so as to be substantially continuous with the outer surface of the cabin 21. Forming a bulging portion 47A;
The bulging portion 47A is bent outward in the left-right direction from the front edge of the curved plate portion 47B, and further bent forward to form an outer surface substantially continuous with the side exterior panel 57 of the cabin 21.

Secondly, the side surface of the rear cover 46 and the bent plate portion 47B of the side cover 47 are formed in a downwardly outwardly curved surface, and the bulging portion 47A has the outer surface formed substantially vertically. The outer surface is further bent inward in the left-right direction to form a U-shaped cross section.
Third, the bulging portion 47 </ b> A is formed over the entire height of the bonnet 15, and its upper end surface is positioned on the upper surface of the bonnet 15.
Fourth, the outer surface of the bulging portion 47A is inclined in a front-down manner so as to be continuous with the inclination of the rear lower portion of the bonnet 15 in a side view.

The present invention has the following features.
A swivel working machine according to the present invention includes a swivel base on a traveling device so as to be rotatable about a vertical axis, a bonnet at a rear portion on the swivel base, and a cabin at a front portion. A seal receiving member is provided inside the side exterior panel, a seal material is provided between the seal receiving member and the front surface of the bonnet, and the exterior panel is covered so as to cover the left and right outer sides of the seal material and the left and right outer sides of the bonnet. The rear edge extends rearward.
By adopting such a configuration, the exterior panel covers the left and right outer sides of the sealing material to improve the appearance, and even if water enters from the gap between the exterior panel and the bonnet side, it directly affects the sealing material The sealability is suitably ensured.

Further, the turning work machine according to the present invention comprises a swivel base on the traveling device so as to be rotatable about a vertical axis, a bonnet at the rear on the swivel, and a cabin at the front, The left and right side portions of the bonnet are formed with bulging portions that protrude outwardly from the left and right sides so as to be substantially continuous with the shape of the left and right side portions of the cabin.
By adopting such a configuration, it is no longer necessary to form the shape of the cabin exterior panel or the like in accordance with the curved surface of the bonnet, and a substantially continuous appearance can be obtained easily and inexpensively at the boundary between the bonnet and the cabin. Will be able to.

  Further, the swivel working machine according to the present invention comprises a swivel base on the traveling device so as to be rotatable around an axis in the vertical direction, a bonnet at the rear on the swivel, and a cabin at the front, A seal receiving member is provided inside the side exterior panel of the cabin, a sealing material is provided between the seal receiving member and the front surface of the bonnet, and the outer packaging is provided so as to cover the left and right outer sides of the sealing material and the left and right outer sides of the bonnet. The rear edge of the panel extends rearward, and bulges are formed on the left and right sides of the bonnet so as to project outwardly from the left and right sides so as to be substantially continuous with the shape of the left and right sides of the cabin. It is.

Thereby, the sealing property between the bonnet and the cabin is improved, and a substantially continuous appearance can be obtained easily and inexpensively at the boundary portion between the two.
The front surface of the bonnet is preferably formed as a flat surface, and good sealing can be performed by contacting a sealing material between the flat surface and the cabin.

  According to the present invention, a substantially continuous appearance between the bonnet and the cabin can be obtained easily and inexpensively.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
As shown in FIG. 1 and FIG. 2, the turning work machine 1 according to the embodiment of the present invention has an axial center X in the vertical direction via a turning bearing on an upper part of a traveling device 3 having a pair of left and right crawler traveling bodies 2. A swivel base 4 is mounted so as to be rotatable around. A work device 5 is provided at the front end of the swivel base 4.
The work device 5 includes a swing bracket 12 attached to the front end of the swivel 4 so as to be swingable left and right, a boom 6 connected to the swing bracket 12 so as to be swingable up and down, and swinging up and down at the tip of the boom 6. The excavation work device has an arm 7 that is movably coupled and a bucket 8 that is pivotally coupled to the tip of the arm 7. The swing bracket 12, the boom 6, the arm 7, and the bucket 8. Are actuated by hydraulic cylinders 13, 9, 10, 11 respectively. In addition, this working device 5 may be replaced with another device such as a breaker instead of the bucket 8.

A bonnet 15 is mounted on the rear part of the swivel 4, and a driver's seat 16, a control floor 17, control levers 18 and 19, a control pedal 20, etc. are provided on the front side of the hood 15 as shown in FIGS. A control unit 14 is provided. The control unit 14 is surrounded by a cabin 21 provided at the front part on the swivel 4.
The swivel base 4 has a left and right side portion and a front portion formed in a straight line shape in a plan view, and a rear end portion formed in an arc shape. The rear end portion protrudes rearward from the traveling device 3. The pivot axis X is arranged in front of the front and rear center of the swivel base 4, and the rear end of the swivel base 4 protrudes left and right from the traveling device 3 even when the swivel base 4 is swung left and right. It is like that. The driver's seat 16 is disposed on the rear side of the pivot axis X, and at the front and rear of the swivel base 4 and at substantially the center of the left and right.

A plate-like base frame 23 is provided at the bottom of the swivel base 4, and counterweights 24 and 25 are provided at the rear ends of the base frame 23. The left and right sides and the front of the base frame 23 are covered with a cover body 26. Covered by. The counterweights 24, 25 have a main weight 24 disposed at the center of the left and right sides and side weights 25 disposed on both the left and right sides of the main weight 24. The side weights 25 are swiveled. The protector protects the left and right corners of the rear end of the base 4.
As shown in FIGS. 4 and 7, an engine 27 is mounted horizontally on the upper surface of the rear portion of the base frame 23, a hydraulic pump 28 is directly connected to one of the left and right sides (right side) of the engine 27, and a fan is placed on the other side of the left and right sides (left side). 29 and a radiator 30 are disposed. In the present embodiment, a suction-type radiator 30 is employed, and the left and right side weights 25 are formed with an outside air inlet 31 and a discharge port 32 (see FIGS. 5 and 6).

A mounting bracket 34 for mounting the work device 5 is provided at the front end of the base frame 23 so as to protrude forward, and a pair of left and right vertical ribs 35 extends rearward from the mounting bracket 34 (substantially C-shaped). ). A partition wall 36 extending in the left-right direction is provided in the middle of the front and rear of the base frame 23, and the engine 27, the hydraulic pump 28, the radiator 30, and the like are disposed on the rear side of the partition wall 36.
A swivel joint 39 is provided at the position of the turning axis X, and a turning motor 37 is provided in the vicinity thereof. The hydraulic actuators 13, 9, 10, 11 and the like are controlled on the left side of the front portion of the control floor 17. A control valve 38 is disposed.

A hydraulic oil tank 41 is disposed on the front side of the partition wall 36 and on the left and right sides (left side) of the base frame 23, and the fuel tank 40 is disposed on the left and right other side (right side). A suction hose 42 is disposed on the rear side of the partition wall 36 in the left-right direction. One end of the suction hose 42 is connected to the rear part of the hydraulic oil tank 41 and the other end is connected to the hydraulic pump 28. An external return filter (oil filter) 43 is disposed on the front side of the hydraulic oil tank 41.
The bonnet 15 is made of synthetic resin or metal, and mainly covers the outside of the engine 27, the radiator 30, the hydraulic pump 28, etc., and includes a front cover 45, a rear cover 46, and a side cover 47. It consists of and. The front cover 45 and the rear cover 46 have a width across the entire swivel base 4, the front cover 45 is fixed to the swivel base 4, and the rear cover 46 can be flipped upward with its front end upper part as a fulcrum. It is an open / close cover.

The side cover 47 closes a substantially triangular opening formed between the front cover 45 and the front cover 45 and the front cover 45.
The cabin 21 is formed to have substantially the same width as the swivel base 4, and a main frame 50 formed in an arch shape (substantially U-shaped) from the front end of the swivel base 4 to the bonnet 15 is provided on both the left and right sides. I have. The lower ends of the front and rear columns 50A and 50B of the left and right main frame 50 are connected to each other by a connecting member 51, and a ceiling portion 52 is provided between the upper portions.
On the left side of the cabin 21, an intermediate support 53 is vertically provided in the middle part of the front and rear, the front side of the intermediate support 53 is used as an entrance 54 to the cabin 21, and a door 55 that opens and closes the entrance 54 is an intermediate support. 53 is swingably attached.

On the rear side of the intermediate column 53, a side glass 56 is provided in the upper part, and a side exterior panel 57 is provided in the lower part.
A front glass 58 and a rear glass 59 are provided on the front surface and the rear surface of the cabin 21, respectively.
On the right side surface of the cabin 21, a cross beam member 60 is installed between the front and rear columns 50 </ b> A and 50 </ b> B of the main frame 50, a side glass 56 is provided above the cross beam member 60, and an exterior panel 57 is provided below. .

The rear lower end of the cabin 21 is mounted on the upper surface of the front cover 45 of the bonnet 15. Specifically, as shown in FIGS. 4 to 7, a support plate 61 is provided on the back side of the upper surface of the front cover 45, and the rear portion of the cabin 21 is connected to the support plate 61 via a mount rubber or the like. It is like that. .
The support plate 61 has a horizontally long strip shape, and both left and right sides thereof are supported by the base frame 23 or the weight 24 via the leg portions 62.
Further, the front upper portion of the rear cover 46 is rotatably supported on the support plate 61 via a hinge member 63.

In the rear view shown in FIG. 3, the rear cover 46 constituting the bonnet 15 has a curved surface with a side surface shape extending outward and downward. The one side cover 47 is formed in a substantially triangular shape in a side view as shown in FIGS.
As shown in FIGS. 8 to 10, the side cover 47 includes a bulging portion 47 </ b> A that protrudes to the left and right outside at the front edge, and the rear side of the bulging portion 47 </ b> A has a side shape of the rear cover 46. A curved plate portion 47B is formed with a curved surface extending outward and downward, and both are integrally molded. The bulging portion 47A is formed in a U-shaped cross section by bending from the front edge of the curved plate portion 47B to the left and right outer sides, further bending to the front side, and further bending to the left and right inner sides. Further, the bulging portion 47A is formed over the entire height of the bonnet 15, and the upper end surface thereof is located on the upper surface of the bonnet 15.

Here, the outer surface of the bulging portion 47A is a substantially vertical surface so as to be substantially continuous with the left and right outer surfaces of the cabin 21 in the rear view shown in FIG. 3, and in the side view shown in FIGS. 21 is inclined in a front-lowering manner so as to be continuous with the inclination of the rear lower part (inclination of the rear lower part of the main frame 50). For this reason, a substantially continuous appearance can be obtained between the bonnet 15 and the cabin 21 (particularly, the main frame 50). Further, by forming the bulging portion 47A in the side cover 47, the bonnet 15 Since the side is adapted to the shape of the cabin 21, it is not necessary to cut out the exterior panel of the cabin 21 according to the curved shape of the side surface of the bonnet 15, or to provide an additional panel. And sealing the cabin 21 can be avoided.

As shown in FIGS. 1, 5 and 6, the front surface 45 </ b> A on both the left and right sides of the front cover 45 is a flat surface inclined in a front-lowering manner. A seal is made.
Specifically, as shown in FIG. 8 showing a portion indicated by arrows AA in FIG. 1, a seal receiving member 65 projecting inward left and right is provided inside the side exterior panel 57 of the cabin 21, and this seal A sealing material 66 is provided between the receiving member 65 and the front surface 45A of the front cover 45 to prevent intrusion of water or the like between them.

Further, the rear edge 57A of the side exterior panel 57 closes the gap between the seal receiving member 65 and the front cover 45 from the left and right outer sides, and further covers the left and right side surfaces of the front cover 45 from the outside (the exterior panel 57 and The bonnet 15 side surface extends in the left-right direction).
For this reason, the sealing material 66 is not exposed to the left and right, and the appearance is not impaired. A slight gap 67 is provided between the rear edge 57A of the side exterior panel 57 and the front surface of the side cover 47 (the front surface of the bulging portion 47A). Since the substantially L-shaped labyrinth structure 80 is formed up to the point of time, even if water enters from the gap 67, the sealant 66 is hardly applied directly, and the sealing performance can be suitably maintained. It is like that.

Note that the rear edge 57A of the side exterior panel 57 and the front surface of the side cover 47 are slightly curved in side view as shown in FIG. 1, but the curved shapes of both are slightly uneven. Even if the gap 67 is formed between the two, it can be absorbed.
The side cover 47 and the front cover 45 are formed of separate members, and a sealing material is interposed between them. However, the both 45 and 47 can be integrally formed.
Further, since the seal surface 45A on the bonnet 15 side is a flat surface, the seal receiving member 65 can also be formed on a flat surface, and the gap between the two can be easily made uniform. For this reason, it is easy to provide a reliable seal.

As shown in FIGS. 4 to 6, the control unit 14 is provided with a control floor 17 in the front part of the swivel 4, and a traveling operation lever 18 and an operation pedal 20 are arranged on the front side of the control floor 17. A driver's seat 16 is mounted on the rear side of the control floor 17 via a seat base 68, and a control box 69 having an operation lever 19 is provided on both the left and right sides of the driver's seat 16. A portion where the operation lever 18 and the operation pedal 20 are provided is covered with an operation portion cover 70.
The control floor 17 covers the entire front side of the driver's seat 16 so as to surround the operation unit cover 70, and the left and right sides of the front end thereof are inclined forward and upward to serve as a footrest for the operator. In addition, a wide space is formed vertically below the inclined portion 17A, and a control valve 38 is disposed in the space.

The control floor 17 is detachably attached to the turntable 4 with bolts or the like, and can be exposed to expose the inside of the turntable 4 (inside the cover body 26) (see FIG. 12).
On the other hand, the hydraulic oil tank 41 disposed on the left side of the swivel 4 is disposed in the range of the bonnet 15 on the rear side and in the range of the cabin 21 on the front side as shown in FIG. An external return filter 43 disposed on the front side of the oil tank 41 is disposed below the control floor 17.

And since the hydraulic oil tank 41 and the return filter 43 are arrange | positioned at the entrance / exit 54 side formed in the left side surface of the cabin 21, by removing the control floor 17 from the turntable 4 as shown in FIG. The return filter 43 can be inspected through the doorway 54 from the outside.
Further, as shown in FIG. 13, the rear side of the hydraulic oil tank 41 can be exposed by removing the left side cover 47 of the bonnet 15, thereby connecting the suction hose 42 and the suction filter. Inspection is possible.

Accordingly, such an inspection of the hydraulic oil tank 41 and its accessory device (filter) 43 can be easily performed from the outside of the cabin 21 while the cabin 21 is mounted on the swivel base 4.
As shown in FIGS. 4, 6, and 7, the fuel tank 40 is disposed on the right side of the swivel 4, and the fuel tank 40 has a lower maintenance frequency than the hydraulic oil tank 41. There is no problem even if it is on the side of the entrance / exit 54 of 21. Further, since the fuel tank 40 is disposed on the opposite side of the hydraulic oil tank 41, the left / right balance of the swivel base 4 can be suitably achieved.

The fuel tank 40 includes a main portion 40A that is long in the front and rear direction and wide in the left and right sides, a lower bulging portion 40B that bulges from the lower rear side of the main portion 40A, and a bonnet 15 that bulges upward from the upper rear side. The upper bulging portion 40C can be accommodated within the swivel base 4 so that it can be accommodated in the side surfaces of the cover body 26 and the bonnet 15 without removing the cabin 21 from the swivel base 4. The right side cover 47 can be removed outward by removing the right side cover 47.
A refueling cylinder 72 is provided on the upper bulging portion 40C of the fuel tank 40 so as to project rearward and upward. A front end of a flexible extension pipe 73 is connected to the refueling cylinder 72, and a rear end of the extension pipe 73 is provided. Is connected to the front end of an L-shaped oil supply pipe 74 supported by a leg portion 62 of the support plate 61 via a bracket or the like.

The oil supply pipe 74 is disposed in the rear cover 46, and a lower portion thereof is supported so as to be rotatable around an axial center in the front-rear direction, and has an attitude in which the oil supply port 74A faces upward and is accommodated in the rear cover 46. The posture can be changed to the posture that protrudes from the range of the rear cover 46 with the oil supply port 74A facing left and right outside, and refueling is facilitated by opening the rear cover 46 and directing the oil supply port 74A of the oil supply pipe to the outside. It can be done.
The present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the scope of the claims.

For example, in the above-described embodiment, a type in which the rear end of the swivel base 4 protrudes from the front-rear width and the left-right width of the traveling device 3 (so-called standard machine) is shown as a form of the swivel work machine. A type in which the end does not protrude from the front-rear width and the left-right width of the traveling device 3 (so-called small rear turning type), and a type in which the base of the excavating work device 5 is supported on the side of the driver's seat 16 (ultra-small turning type) can do.
The cabin 21 extends over substantially the entire width of the swivel base 4. However, when the swivel base 4 is relatively large and the driver's seat is arranged on one side of the swivel base 4, the cabin 21 is narrower than the swivel base 4. The cabin 21 may be provided eccentric to the left and right sides of the swivel base 4.

1 is an overall side view of a turning work machine according to an embodiment of the present invention. It is the perspective view which looked at the turning working machine from diagonally backward. It is a rear view of a turntable. Top view of the swivel with the cabin omitted It is a left view of a turntable. It is a right view of a turntable. It is a top view inside a turntable. It is AA arrow sectional drawing of FIG. It is a perspective view of the principal part of a front cover and a side cover. (A) is a rear view of a side cover, (b) is a side view of a side cover. It is a perspective view of a turntable (a cabin shows only a skeleton). It is a perspective view of a turntable (a cabin shows only a skeleton) with a control floor removed. It is a perspective view of a swivel (a cabin shows only a skeleton) in a state where a left side cover of a bonnet is removed.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Rotating work machine 3 Traveling apparatus 4 Rotating stand 15 Bonnet 21 Cabin 45 Front cover 45A Front surface 47 Side cover 47A A bulging part 57 Side part exterior panel 57A Rear edge 65 Seal receiving member 66 Seal material X Rotating shaft center

Claims (4)

A swivel base (4) is provided on the traveling device (3) so as to be rotatable around a vertical axis (X), a bonnet (15) is provided on the rear part of the swivel base (4), and a cabin ( 21), and the bonnet (15) includes a front cover (45) on which a rear lower portion of the cabin (21) is mounted, a rear cover (46) that can be opened and closed, and a side cover (47) therebetween. Have
A curved plate portion (47B) is formed along the side surface shape of the rear cover (46) at the rear portion of the side cover (47), and outward from the curved plate portion (47B) at the front portion of the side cover (47). Projecting and forming a bulging portion (47A) substantially continuous with the outer surface of the cabin (21),
The bulging portion (47A) is bent outward in the left-right direction from the front edge of the curved plate portion (47B), and further bent forward, and has an outer surface substantially continuous with the side exterior panel (57) of the cabin (21). A swivel working machine characterized by forming.   The side surface of the rear cover (46) and the curved plate portion (47B) of the side cover (47) are formed in a downwardly outwardly curved surface, and the bulge portion (47A) has the outer surface substantially omitted. The swing working machine according to claim 1, wherein the swing work machine is formed vertically and bent further inward in the left-right direction from the outer side surface so as to have a U-shaped cross section.   The swivel operation according to claim 1 or 2, wherein the bulging portion (47A) is formed at the entire height of the bonnet (15), and an upper end surface thereof is positioned on an upper surface of the bonnet (15). Machine.   The outer surface of the bulging portion (47A) is inclined in a front-down manner so as to be continuous with the inclination of the rear lower portion of the bonnet (15) in a side view. The turning work machine as described in the item.

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