JP5841487B2 - Working machine - Google Patents

Description

  The present invention relates to a work machine such as a backhoe.

Patented as a working machine in which a pair of left and right vertical plates located on the side of the cabin is provided on the aircraft body on which the cabin is mounted, and the base of the boom is pivotally supported about the left and right axis between the left and right vertical plates. There is an ultra-small swivel backhoe described in Document 1.
In this backhoe, the fuselage is constituted by a turntable that is supported on a crawler type traveling device so as to be turnable around an up and down axis. The cabin is mounted on the left side of the swivel, and the left and right vertical plates are provided on the right side of the cabin.

In the cabin, a driver's seat and control devices provided on the left and right sides of the driver's seat are provided.
The cabin has an opening at the bottom, and after assembling equipment, parts, etc. that are placed in the cabin of the cabin, such as the driver's seat and control device, on the swivel, the cabin is lowered from the top of the driver's seat to the swivel. Attached via anti-vibration rubber.

On the other hand, in order to secure the cabin interior space, it is necessary to bring the right side of the cabin close to the left vertical plate. If there is a protrusion on the left side of the left vertical plate, for example, the boom When there is a boss that supports the boom pivot that pivotally supports the base, the boss is in the way, and the cabin cannot be installed as close to the left vertical plate as possible.
Therefore, before lowering the cabin from above, attach the side cover that covers the lower side of the right side of the cabin chamber to the left side of the left vertical plate, and fix the upper side of the right side of the cabin to the upper edge of this side cover. By adopting a structure in which the side panels constituting the abutment are brought into contact with each other through a sealing material, the cabin can be installed close to the left vertical plate.

  Therefore, in this case, although the side cover is rigidly fixed to the swivel base, the cabin is fixed to the swivel base via the anti-vibration rubber, and the cabin vibrates with respect to the swivel base. The right side panel of the cabin and the side cover are fastened with bolts via rubber so that the right side panel of the cabin and the side cover do not shift in the left-right direction due to the rolling of the vehicle.

JP 2010-150813 A

As described above, if the cabin that vibrates with respect to the swivel base and the side cover fixed to the swivel base are bolted together, the rubber is interposed but it is impossible. Force is applied.
Further, when bolting the side panel and the side cover of the cabin, the bolt insertion hole formed in the side panel on the right side of the cabin and the side cover are formed by the deflection of the anti-vibration rubber that supports the cabin. There is also a problem that the bolt insertion hole is difficult to match.

  Then, this invention makes it a subject to provide the working machine which can solve the said problem.

The technical means taken by the present invention to solve the technical problems are characterized by the following points.
According to the first aspect of the present invention, a pair of left and right vertical plates located on the sides of the cabin is provided on the cabin on which the cabin is mounted, and the base of the boom rotates about the left and right axis between the pair of left and right vertical plates. A work machine that is freely pivoted,
Attach and fix the side cover that covers the lower side of the side of the vertical side of the cabin chamber to the vertical side of the cabin.
A side panel on the vertical plate side of the cabin is brought into contact with the upper edge of the side cover in a butting manner through a sealing material, and the side panel on the upper edge side of the side cover is connected to the side panel on the vertical plate side of the cabin. An overlap wall that overlaps visually is provided, and a restriction wall that sandwiches the side cover with the overlap wall is provided on the side panel on the vertical plate side of the cabin.

In the invention which concerns on Claim 2, the said overlap wall is located in the cabin interior side of a side cover,
The restriction wall is located outside the cabin chamber of the side cover, and is provided along the upper edge of the side cover.
The invention according to claim 3 is characterized in that the regulation wall is detachably provided on the side panel of the cabin.

The present invention has the following effects.
According to the first aspect of the present invention, the side cover that covers the lower side of the side surface of the cabin chamber on the vertical plate side of the cabin chamber is attached and fixed to the vertical plate on the side closer to the cabin, and the cabin vertical Even if there is a protrusion on the side facing the cabin side of the vertical plate on the side close to the cabin, the cabin side It can be installed close to the vertical plate.

In addition, the side cover is sandwiched from both the left and right sides by the overlap wall and the restriction wall provided on the side panel on the vertical plate side of the cabin, so that the side cover and the side panel of the cabin are moved side by side due to the rolling of the cabin. It is restricted from moving in the direction.
Further, since the side cover and the side panel of the cabin are not fixed to the rigid, an excessive force does not act on the side cover when the cabin vibrates.

Further, as in the case where the side cover and the side panel of the cabin are fixed with bolts, it is not necessary to align the bolt insertion holes of the side cover and the bolt insertion holes of the side panel of the cabin.
According to the second aspect of the present invention, in the case where the overlap wall is located on the cabin interior side of the side cover and the regulation wall is located outside the cabin compartment of the side cover, the regulation wall extends along the upper edge of the side cover. By providing, the waterproofness of the upper edge side of the side cover in which water may enter may be improved.

  According to the invention which concerns on Claim 3, replacement | exchange of a sealing material is possible by removing a control wall, and maintenance property is good.

It is a side view of the principal part. It is a right view of a revolving frame and a cabin. It is a decomposition | disassembly side view of a cabin, a control wall, a side cover, and a turning frame. It is a side view of a turning frame. It is a front view, such as a turntable. It is a left view of the state which attached the side cover to the turning frame. It is a front fragmentary sectional view of a boom pivot part. (A) is sectional drawing of the seal part of the side cover and cabin side panel of the state which assembled | attached the cabin, (b) is sectional drawing of the sealed part of the side cover and cabin side panel of the state before assembling a cabin . It is a right view of a backhoe. It is a front view of a backhoe. It is a top view of a backhoe.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
9 to 11, reference numeral 1 denotes an ultra-small turning type backhoe exemplified as a working machine, and the backhoe 1 is mainly composed of an upper turning body 2 and a lower traveling body 3.
The traveling body 3 includes a crawler traveling device 5 on both the left and right sides of the track frame 4.
As shown in FIG. 9, each of the left and right crawler type traveling devices 5 includes a front idler 6, a rear sprocket 7, a plurality of wheels 8 disposed between the idler 6 and the sprocket 7, and an idler. 6, the sprocket 7 and the crawler belt 9 wound around the wheel 8, and the crawler belt 9 is circulated and rotated in the longitudinal direction by rotationally driving the sprocket 7 by a traveling motor 10 made of a hydraulic motor. Thus, the backhoe 1 can travel in the front-rear direction.

A dozer device 11 is provided at the front of the traveling body 3.
As shown in FIG. 9, the swivel body 2 includes a machine body 12 (referred to as a swivel base) that is supported on the track frame 4 of the traveling body 3 so as to be pivotable about a swivel axis in the vertical direction, and a front portion on the swivel base 12. A cabin 13 mounted on the left side and a work device 14 (excavation work device) supported on the front right side of the swivel base 12 are provided.

  The swivel base 12 has a swivel frame 16 (airframe frame) serving as a skeleton (main body), and, as shown in FIG. As shown in FIG. 10, the right front side and front right side of the revolving frame 16 are covered with the right revolving cover 18, and the left front side and front left side of the revolving frame 16 are covered with the left revolving cover 19, as shown in FIG. It becomes.

As shown in FIGS. 4 and 5, the swivel frame 16 is mounted on a swivel substrate 20 supported on the track frame 4 via a swivel bearing or the like so as to be rotatable about a vertical axis. A pair of left and right vertical plates constituting a part of the swivel frame 16 is provided near the center of the swivel board 20 on the right side in the left-right direction. 21L and 21R are erected and fixed. The left and right vertical plates 21L and 21R are arranged to face each other with an interval in the left-right direction so that the plate surfaces face the left-right direction.

The right vertical plate 21R is mainly composed of a main plate portion 22 arranged at the front portion of the revolving substrate 20, and an extending portion 23 extending rearward from the lower portion of the main plate portion 22, and the main plate of the right vertical plate 21R. A left vertical plate 21L is disposed opposite to the left side of the portion 22.
The main plate portion 22 and the left vertical plate 21L of the right vertical plate 21R are connected to each other by a first connection plate 24 and a second connection plate 25.

The first connection plate 24 is vertically arranged between the rear end side of the main plate portion 22 and the rear end side of the left vertical plate 21L so that the plate surface faces forward, and is erected on the revolving substrate 20.
The second connecting plate 25 extends forward from the vertical middle portion of the first connecting plate 24 and then extends in the forward downward inclination direction, and then extends downward and is connected to the turning substrate 20. A pair of cylinder brackets 26 that are opposed to each other in the left-right direction are fixed to the front portion of the base 2 connection plate 25.

The left and right vertical plates 21 </ b> L and 21 </ b> R are formed with through holes 27 for passing a hydraulic hose or the like below the second connection plate 25.
The main plate portion 22 of the right vertical plate 21R is formed so that the rear portion is higher than the front portion.
The left vertical plate 21L has a rear portion formed at the same height as the rear portion of the main plate portion 22 of the right vertical plate 21R, an intermediate portion is recessed downward, and a protruding portion 28 protruding upward is formed on the front portion side. Yes.

The main plate portion 22 and the left vertical plate 21L of the right vertical plate 21R are concentrically formed with a boom support hole 29 having a left and right axial center on the front end side and the upper end side of the rear portion.
A cylindrical boss 31 is fixed to the left side surface of the main plate portion 22 of the right vertical plate 21R concentrically with the boom support hole 29, and a cylindrical boss 32 is fixed to the boom support hole 29 on the left side surface of the left vertical plate 21L. And fixed as concentric.

Further, as shown in FIGS. 1 to 3, screw holes 33 are formed in the left vertical plate 21 </ b> L on the rear side of the boss 32, the front lower side of the boss 32, and the front part of the protruding portion 28.
As shown in FIGS. 9 to 11, the work device 14 includes a boom 34, an arm 35, and a bucket 36 (work tool).
The boom 34 is configured by an offset boom, and is pivotally connected to the main boom 34A, the front end side of the main boom 34A, and is swingable left and right, and the front end side of the offset boom 34B. An arm bracket 34C that is pivotally connected and swings left and right, and an offset link 34D that is pivotally connected to the main boom 34A and the arm bracket 34C are provided.

As shown in FIGS. 5 and 7, the base end side of the main boom 34A is disposed between the boom support hole 29 of the main plate portion 22 of the right vertical plate 21R and the boom support hole 29 of the left vertical plate 21L. The left and right boom support holes 29, the left and right bosses 31 and 32, and the boom pivot shaft 37 that passes through the base end side of the main boom 34A are rotatably supported about the left and right axes.
The main boom 34A is swung up and down by a boom cylinder 38 provided over the cylinder bracket 26 and the distal end side of the main boom 34A. The offset boom 34B and the offset link 34D are swung left and right by an offset cylinder 39 provided across the distal end side of the main boom 34A and the distal end side of the offset boom 34B.

The arm 35 is pivotally connected to the arm bracket 34 </ b> C and is swung back and forth by the arm cylinder 40.
The bucket 36 is pivotally connected to the arm 35 on the distal end side, and is squeezed and dumped by the bucket cylinder 41.
As shown in FIGS. 9 and 11, a bonnet 42 is provided at the rear of the swivel base 12 so as to freely open and close the rear upper part of the engine room in which the engine or the like is accommodated. It is blocked by the weight 17.

A partition cover 43 shown in FIGS. 2 and 5 is provided in front of the bonnet 42. The partition cover 43 covers the front wall and the front end of the upper wall 44 so as to cover the front surface and the front upper surface of the engine room. And a front wall 45 extending downward.
As shown in FIGS. 9 to 11, a tank cover 46 that covers the hydraulic oil tank, the battery, and the like is provided on the right side of the swivel base 12 and on the right side of the right vertical plate 21 </ b> R.

The cabin 13 is disposed on the left side of the left vertical plate 21 </ b> L (the vertical plate 21 </ b> L closer to the cabin 13) on the left side of the turntable 12.
In the cabin 13, as shown in FIG. 5, as shown in FIG. 5, a driver's seat 47, control devices 48 </ b> L and 48 </ b> R located on the left and right sides of the driver's seat 47, and a pair of left and right traveling levers 49 </ b> L , 49R and the like.

The driver's seat 47 is attached to a seat base 50 that is mounted and fixed on a floor plate (step) (not shown) provided in a cabin arrangement portion on the upper surface side of the swivel base 12, and the left and right control devices 48L and 48R are attached to the seat base 50. It is supported via support members 51L and 51R.
The left and right control devices 48L and 48R operate the work device 14, the swivel 12 and the dozer device 11, and the travel levers 49L and 49R operate the left and right crawler travel devices 5. It is.

As shown in FIGS. 9 to 11, the cabin 13 includes a roof 52 that covers the upper surface of the cabin 13, a front panel 53 that covers the front of the cabin 13, and a back panel 54 that covers the upper back of the cabin 13. The left side panel 55 covering the left side surface of the cabin 13 chamber and the right side panel 56 covering the upper portion of the right side surface of the cabin 13 chamber are provided.
The front panel 53 has a windshield 57, the back panel 54 has a rear glass 58, the left side panel 55 has a door panel 59, and the right side panel 56 has a side glass 60.

The cabin 13 is open downward, and is lowered from above with respect to the swivel base 12 and attached to the swivel frame 16.
As shown in FIG. 5, a horizontal frame member 61 is provided on the lower end side of the front panel 53, and this horizontal frame member 61 is attached to and supported by a support plate 62 provided on the revolving frame 16 via a vibration isolating rubber 63. Has been. The front part of the cabin 13 is supported at two places on the left and right.

As shown in FIG. 2, the rear portion of the cabin 13 is placed on the upper wall 44 of the partition wall cover 43, and the rear portion of the cabin 13 is erected on the revolving substrate 20 to support the partition wall cover 43. It is attached to and supported by a support body (not shown) via a vibration-proof rubber. The support portion of the rear portion of the cabin 13 is also two left and right.
As shown in FIGS. 1, 2, 6 and 7, the left side surface of the left vertical plate 21L (the side surface facing the cabin 13 of the vertical plate 21L closer to the cabin 13) is the right side surface of the cabin 13 chamber. A side cover 64 that covers the lower part of the housing is fixedly attached.

The side cover 64 is made of a flat plate material, and the lower end of the side cover 64 is superimposed on the upper side of the left vertical plate 21L, and the left vertical plate 21L is inserted through a bolt insertion hole 65 formed in the side cover 64. It is fixed by a bolt (not shown) that is screwed into the screw hole 33 formed in the above.
Further, the side cover 64 is formed with a notch 66 for avoiding interference with the boss 32 provided on the left side surface of the left vertical plate 21L.

As shown in FIGS. 3 and 6, the upper edge 67 of the side cover 64 is formed in a gently sloping shape with a front-lowering from the rear part 67 a to the midway part 67 b, and the front part 67 c of the upper edge 67 of the side cover 64. The front cover 67 is formed in a front-declining slope with a larger slope than the rear portion 67a and the midway portion 67b of the upper edge 67 of the side cover 64.
Further, the front edge 68 of the side cover 64 is formed in a straight line along the vertical direction.

A sealing material 69 (referred to as a first sealing material) is fitted and fixed from the rear end side of the upper edge 67 side portion of the side cover 64 to the lower end of the front edge 68 side portion.
As shown in FIG. 8, the first seal material 69 includes a fitting portion 69a that fits into the upper edge 67 side portion and the front edge 68 side portion of the side cover 64, and a hollow contact portion 69b. .
As shown in FIGS. 1 to 3, the rear edge 70 of the side cover 64 is formed in a shape along the rear part of the rear edge 70 of the side cover 64 of the front wall 45 of the partition cover 43. A second sealing material 71 that seals between the partition wall cover 43 and the rear edge 70 of the side cover 64 is fitted and fixed to the rear edge 70 side portion of the side cover 64.

A support bracket that supports the right control device 48R is attached to the left side surface (the surface inside the cabin 13) of the side cover 64.
A sealing material is provided between the side cover 64 and the left vertical plate 21L. A window opening 72 is formed in the front portion of the side cover 64, and the window opening 72 is closed with a transparent plate such as a glass plate.

As shown in FIG. 2, the right side panel 56 of the cabin 13 includes a panel main body 73 and a side glass 60 that closes a window opening 74 formed in the panel main body 73.
The panel body 73 includes a main body 76 positioned on the upper side of the side cover 64 and an extension 77 extending downward from the front end side of the main body 76 and positioned in front of the side cover 64.

  Further, as shown in FIG. 8, the panel main body 73 includes an inside panel 78 on the cabin 13 interior side and an outside panel 79 on the cabin 13 exterior side. The inside panel 78 and the outside panel 79 are overlapped and joined at the peripheral edge portion of the window opening 74, the lower end side of the main body portion 76, and the rear end side of the extension portion 77, and the other portions are spaced apart. Thus, the space between the inside panel 78 and the outside panel 79 is hollow.

  As shown in FIGS. 3 and 8, the overlapping portion of the inside panel 78 and the outside panel 79 on the lower end side of the main body portion 76 of the panel main body 73, and the inside panel 78 and the outside on the rear end side of the extension portion 77. The overlapping portion with the panel 79 is formed along the upper edge 67 and the front edge 68 of the side cover 64, and is located on the cabin 13 interior side of the upper edge 67 side portion and the front edge 68 side portion of the side cover 64. In addition, an overlap wall 80 that overlaps the upper edge 67 side portion and the front edge 68 side portion of the side cover 64 in a side view is formed.

Further, as shown in FIG. 8, the outside panel 79 protrudes outward in the left-right direction from the base portion of the overlap wall 80, and the side cover 64 is formed on the upper edge 67 and the front edge 68 of the side cover 64. A seal contact portion 81 that faces in the plate surface direction (facing the contact portion 69b of the first seal material 69) is formed, and the contact portion 69b of the first seal material 69 is abutted against the seal contact portion 81. The space between the side cover 64 and the right side panel 56 is sealed.

  On the lower end side of the main body portion 76 of the right side panel 56, a regulating wall 82 is provided that is positioned outside the cabin 13 at the upper edge 67 side portion of the side cover 64. The restriction wall 82 overlaps the upper edge 67 side portion of the side cover 64 in a side view, and the restriction wall 82 and the overlap wall 80 form the upper edge 67 side portion (first seal) of the side cover 64. The material 69) is sandwiched from both the left and right sides. As a result, the side cover 64 and the right side panel 56 of the cabin 13 are restricted from shifting in the left-right direction due to the rolling of the cabin 13. In addition, since the side cover 64 and the side panel 56 on the right side of the cabin 13 are not rigidly fixed, an excessive force does not act on the side cover 64 when the cabin 13 vibrates. Further, as in the case where the side cover 64 and the right side panel 56 of the cabin 13 are fixed with bolts, the bolt insertion holes of the side cover 64 and the bolt insertion holes of the right side panel 56 of the cabin 13 are aligned. It is unnecessary.

The restriction wall 82 is formed of a plate material, and is formed long in the front-rear direction along the upper edge 67 of the side cover 64.
In the present embodiment, the regulation wall 82 is fixed to the outside panel 79 of the right side panel 56 by mounting bolts 83. Specifically, the mounting bolt 83 is passed through the restriction wall 82 and the outside panel 79 from the right side of the cabin 13, and the mounting bolt 83 is screwed into a nut 84 fixed to the inner surface side of the outside panel 79. ing.

The regulating wall 82 is formed to have a length extending from the rear end of the upper edge 67 of the side cover 64 to the rear end side of the front portion 67 c of the upper edge 67 of the side cover 64. Accordingly, the waterproof property between the side panel 56 on the right side of the cabin 13 and the side cover 64 is improved.
Since the restriction wall 82 is detachably attached to the right side panel 56 of the cabin 13 by the mounting bolt 83, the first sealing material is mounted with the cabin 13 mounted on the swivel base 12 by removing the restriction wall 82. 69 can be exchanged.

  In the case of the above configuration, when the cabin 13 is assembled to the revolving frame 16, the cabin 13 is mounted with the side cover 64 attached to the left vertical plate 21 </ b> L and the regulation wall 82 attached to the right side panel 56 of the cabin 13. Then, the upper edge 67 (first sealant 69) of the side cover 64 is inserted between the overlap wall 80 and the regulating wall 82.

However, the present invention is not limited to this, and the cabin 13 is assembled to the revolving frame 16 with the side cover 64 attached to the left vertical plate 21L and the regulation wall 82 not attached to the right side panel 56 of the cabin 13. The restriction wall 82 may be attached to the right side panel 56 of the cabin 13.
The present invention is not limited to the above-described embodiment, and various design changes are possible. For example, the restriction wall 82 may be fixed to the right side panel 56 of the cabin 13 by welding. . Further, the regulation wall 82 may be integrally formed of a plate material that forms the panel main body 73 of the right side panel 56 of the cabin 13.

Further, the regulation wall 82 may be provided from the rear edge of the upper edge 67 to the front edge of the upper edge 67 of the side cover 64.
Further, the regulation wall 82 may be provided across the upper edge 67 and the front edge 68 of the side cover 64. In this case, the regulation wall 82 may be formed to have a length extending from the rear end of the upper edge 67 of the side cover 64 to the lower end of the front edge 68 of the side cover 64, or from the rear end of the upper edge 67 of the side cover 64 to the side cover 64. The front edge 68 may be formed to have a length extending midway.

Alternatively, the overlap wall 80 may be positioned outside the cabin 13 of the side cover 64 and the restriction wall 82 may be positioned inside the cabin 13 of the side cover 64.
Moreover, the regulation wall 82 does not need to be formed of a single plate material, and may be formed of a plurality of plate materials.

12 Airframe (swivel platform)
13 Cabin 21L Left Vertical Plate 21R Right Vertical Plate 34 Boom 56 Side Panel 64 Side Cover 67 Upper Edge 68 Front Edge 69 Sealing Material 80 Overlap Wall 82 Regulatory Wall

Claims (3)

A pair of left and right vertical plates (21L, 21R) located on the side of the cabin (13) is provided on the airframe (12) on which the cabin (13) is mounted, and between the pair of left and right vertical plates (21L, 21R). The base of the boom (34) is pivotally supported so as to be rotatable about the left-right axis,
A side cover (64) that covers the lower side of the side surface of the cabin (13) chamber on the side of the longitudinal plate (21L, 21R) is attached and fixed to the longitudinal plate (21L) near the cabin (13).
The side panel (56) on the side of the vertical plate (21L, 21R) of the cabin (13) is brought into contact with the upper edge (67) of the side cover (64) in a butting manner through the sealing material (69). An overlap wall (80) that overlaps the side panel (56) on the vertical plate (21L, 21R) side of the cabin (13) on the upper edge (67) side portion of the side cover (64) in a side view. And a regulating wall (82) sandwiching the side cover (64) with the overlap wall (80) is provided on the side panel (56) on the vertical plate (21L, 21R) side of the cabin (13). Working machine. The overlap wall (80) is located inside the cabin (13) of the side cover (64),
The restriction wall (82) is located outside the cabin (13) of the side cover (64) and is provided along the upper edge (67) of the side cover (64). Item 4. The working machine according to Item 1.   The working machine according to claim 2, wherein the regulating wall (82) is detachably provided on the side panel (56) of the cabin (13).

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