JP2002030694A - Slewing working machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To properly load a water tank for watering on an ultra small slewing back hoe, and to ensure the opening and closing of an opening and closing part of a bonnet and the back visibility. SOLUTION: In this slewing working machine where the bonnet 11 covering an engine is mounted on a rear part of a turntable 6, a cab 7 is installed at a lateral one side on the turntable 6 at a front side of the bonnet 11, and a basic part of the working device 4 is mounted on the other lateral side, the water tank 31 is mounted on an upper part of the bonnet 11 at a rear side of the driver's seat, and the water tank 31 is retractable from the upper part of the opening and closing part of the bonnet 11 and the rear part of the cab 7.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a turning machine such as a backhoe.

[0002]

2. Description of the Related Art Conventionally, a swivel is supported on a traveling device so as to be rotatable about a vertical swivel axis, and a hood covering an engine is provided at a rear portion of the swivel. With a driver's seat on the left side of the table,
There is a small-sized backhoe (mini-backhoe) called an ultra-small swing backhoe provided with a working device mounting portion for mounting the base of the boom of the working device on the right side of the swivel table. The working device of this ultra-small swivel backhoe usually has a boom whose base is rotatably pivoted around a left-right axial center so that it can swing up and down, and a base at the tip side of the boom. An offset boom whose side is pivoted so that it can swing left and right,
An arm mounting body pivotally connected to the base side at the distal end side of the offset boom and swinging left and right; an arm pivotally mounted at the base side to the distal end side of the arm mounting body to be swingable;
A bucket pivotally attached to the distal end of the arm and connected via a link mechanism to enable the scraping and discharging operations, and a bucket having one end pivotally attached to the distal end of the boom and the other end being a side surface of the arm mounting body. And an offset link that is pivotally mounted on the shaft and forms a parallel quadruple link with the offset boom.

[0003]

In a backhoe, an asphalt planar for excavating asphalt may be attached to a tip end of an arm of a working device instead of a bucket. In this asphalt planer operation, one water is used to sprinkle water on the road surface during excavation.
A water tank for storing about 100 liters is required,
The ultra-small swivel backhoe is compact, and the engine, radiator, hydraulic oil tank, fuel tank, driver's seat, etc. are compactly arranged in the narrow space of the swivel, so it has a relatively large capacity of about 100 liters. There is limited space to mount a large water tank.

Further, if the water tank is mounted so as to protrude outwardly from the swivel base, the water tank may hit against something during the swivel and be damaged. Cannot be mounted too large. Also, in the ultra-small turning backhoe, the base of the boom of the working device is attached to the side of the driver's seat, so when the boom body is raised, the middle part of the boom is located above the hood, so it is located behind the boom. Can not arrange a water tank. Therefore, it has been considered to provide a water tank above the hood behind the driver's seat.

However, if the water tank is provided above the hood behind the driver's seat, problems such as the inability to open and close the hood opening / closing portion and poor visibility behind the vehicle arise. Accordingly, the present invention has been made in view of the above problems, and in a turning work machine such as a small backhoe, there is provided a turning work machine that does not hinder even if a tank such as a water tank is arranged behind a driver's seat. Aim.

[0006]

A technical measure taken by the present invention to solve the technical problem is that a hood covering the engine is provided at the rear of the turntable, and the hood is provided on the left and right sides of the turntable in front of the hood. In a turning work machine in which a driver's seat is arranged on one side in the direction and a base of a working device is mounted on the other side in the left-right direction, a tank is provided above a bonnet behind the driver's seat, and this tank is opened / closed by the hood It is characterized in that it can be evacuated from above.

Another feature is that the tank can be retracted from behind the driver's seat. Further, a tank base for mounting and supporting the tank is provided, and the front side on the other side in the left-right direction of the tank base is rotatably supported by a support member provided on the swivel base around a vertical support shaft. The tank can be retracted from above the open / close portion of the hood by rotating the table around the support shaft to the other side in the left-right direction. Further, a support member for supporting one side in the left-right direction of the tank table can be provided on the swivel table.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. 1 and 2, reference numeral 1 denotes a small-sized backhoe, which is referred to as an ultra-small turning backhoe, which is exemplified as a turning work machine. The backhoe 1 has an airframe (upper turning body) 2, a lower traveling body 3, and a working device. (Drilling rig) 4
It is mainly composed of The lower traveling body 3 employs a crawler traveling apparatus including a crawler traveling body having a crawler belt wound around an idler, a driving wheel, and a plurality of wheels on both left and right sides of a track frame. A dozer 5 is provided at the front of the body 3.

The machine body 2 includes a swivel 6 supported on the lower traveling body 3 so as to be rotatable around a vertical swivel axis, a driver seat 7 provided on the swivel 6, and a canopy (a sunshade).
8. It is provided with an engine, a radiator, a hydraulic pump, a hydraulic oil tank, a control valve, a battery, a fuel tank, and the like. Even if the body 2 turns, the body 2 (turntable 6)
The rear side of the vehicle does not protrude from the lateral width of the lower traveling body 3. The rear part of the turntable 6 is constituted by a counterweight 9 for adjusting the weight balance with the working device 4 and the like arranged on the front side of the turntable 6.

The engine is disposed horizontally at the rear of the swivel 6, and a hood 11 for covering the engine and the like is provided above the upper surface of the swivel 6 at the rear of the swivel 6. As shown in FIGS. 3 and 4, a support frame 10 for supporting the bonnet 11 is provided in the bonnet 11.
Is provided. The support frame 10 includes left and right columns 10a and 10b, and a horizontal frame member 10c connecting upper ends of the left and right columns 10a and 10b. The lower ends of the left and right columns 10a and 10b are pivotable. It is attached and fixed to the 6 side.

An opening / closing section 12 for checking the equipment inside the hood 11 is provided at the rear of the hood 11.
Is provided. The opening / closing portion 12 is mainly composed of an opening portion 14 formed at the rear of a fixed bonnet portion 13 fixed to the swivel 6 and having an open rearward shape, and an opening / closing cover 15 for opening and closing the opening portion 14. . Openable cover 15
The front part of the upper wall part is the horizontal frame material 1 of the support frame 10.
0c is rotatably pivoted about a horizontal axis through a hinge, and is supported by a support frame 10 so as to be swingable up and down, whereby the opening / closing cover 15 can be freely opened / closed.

A driver's seat 7 is arranged on one side (left side) in the left-right direction on the front side of the bonnet 11 on the swivel table 6, and a work equipment mounting on which the base of the work apparatus 4 is mounted on the other side (right side) in the left-right direction. The working device mounting portion 16 is provided.
A tank cover 17 that covers the hydraulic oil tank and the like is provided on the right side of the working device mounting portion 16 so as to extend forward from the right side of the bonnet 11. A canopy 8 is provided between the driver's seat 7 and the working device mounting portion 16.
Is erected. A mounting plate 18A is fixed to a lower end of a support (support member) 18 on the rear side of the canopy 8, and the mounting plate 18A is fixed on a support plate 19 fixed to a horizontal frame member 10c of the support frame 10. It is superimposed and fixed through the upper wall of the part 13.

The working device 4 is of an offset type,
As shown in FIG. 1, a boom 20 whose base is pivotally attached to the working device mounting portion 16 and is vertically swingable, and a base is pivotally attached to the distal end of the boom 20 so that it can swing left and right. The offset boom 21 and the offset boom 21
An arm mounting body 22 pivotally mounted on the distal end side and pivoted from side to side, and a base side pivotally mounted on the distal end side of the arm mounting body 22 so as to be swingable up and down (i.e., swingable back and forth). An arm 23 and an offset link, one end of which is pivotally attached to the tip end of the boom 20 and the other end of which is pivotally attached to the side surface of the arm mounting body 22 to form a parallel quadruple link with the offset boom 21; On the tip side of 23,
Normally, a bucket is provided so as to be capable of scraping and discharging operations. In this example, an asphalt planar 25 is provided instead of the bucket.

A boom cylinder 26 is interposed between the excavator mounting portion 16 and the tip end of the boom 20, and an offset is provided between the tip end of the boom 20 and a longitudinally intermediate portion of the offset boom 21. A cylinder 27 is interposed, and an arm cylinder 28 is interposed between the arm mounting body 22 and the base side of the arm 23. A bucket cylinder 29 is interposed between the base side of the arm 23 and the asphalt planar 25 (bucket). It is interposed. These boom cylinders 2
6, the offset cylinder 27, the arm cylinder 28, and the bucket cylinder 29 are constituted by hydraulic cylinders.

Then, the boom 20 swings by the extension / contraction operation of the boom cylinder 26 (the movement of the cylinder rod), and the offset boom 21 and the offset link swing by the extension / contraction operation of the offset cylinder 27. Arm mounting body 22, arm 23
And the asphalt planer 25 (bucket) and the like are configured to move horizontally. The arm 23 swings by the extension and contraction of the arm cylinder 28, and the asphalt planar 25 (bucket) swings by the extension and contraction of the bucket cylinder 29.

Further, in the ultra-small turning backhoe 1, the boom 20 is raised as shown by a virtual line in FIG.
When the working device 4 is in the folded state (at this time, the middle part of the boom 20 is located above the hood 11), the projection of the working device 4 onto the swivel 6 is within the outline of the swivel 6 in plan view. It is configured to fit approximately. Figure 1
As shown in FIG. 4, the backhoe 1 has a water tank 3 for storing water for sprinkling water on the road surface A when excavating the road surface A by the asphalt planar 25.
1 is mounted.

The water tank 31 is disposed behind the driver's seat 7 and above the bonnet 11, and is supported by a tank table 32 supported on the swivel 6 (canopy 8). Note that the water tank 31 is disposed above the left side of the bonnet 11 because the water tank 31 is disposed above the right side of the bonnet 11 when the boom 20 is erected as described above. This is because there is a risk of hitting the water tank 31 or the like.

As shown in FIGS. 3 to 6, the tank table 32 is vertically arranged behind the column 18 on the rear side of the canopy 8.
The main structure is provided with a support member 35 rotatably mounted around a vertical axis through a support member 34 and a mounting table 36 fixed to a lower end side of the support member 35. As shown in FIGS. 6 to 8, the upper mounting device 33 includes a pair of upper and lower fixing brackets 37 fixed to the upper part of the column 18 of the canopy 8 and a pair of upper and lower fixing members 37 fixed to the upper part of the support member 35 of the tank base 32. , And a support shaft 39 penetrating the fixed bracket 37 and the movable bracket 38.

The upper and lower fixing brackets 37 are fixed to a fixing plate 40 fixed to the column 18 so as to project rearward, and the upper and lower fixing brackets 37 are connected by a reinforcing plate 42. The upper and lower movable brackets 3
Numeral 8 is fixed to the support member 35 so as to project diagonally rightward from the support member 35 forward, and is inserted between the fixed brackets 37. The cylindrical body 43 located between the 37 is fixed with the upper and lower movable brackets 38 penetrating therethrough.

The support shaft 39 has a vertical axis, and is provided with the upper and lower fixed brackets 37 and the cylindrical body 43 (upper and lower movable brackets 38) inserted therethrough. An upper fixed bracket 37 is provided on the upper end side of the support shaft 39.
Is fixed to the upper fixing bracket 37 by bolts 45, and the support shaft 39 is prevented from coming off.
On the other hand, as shown in FIGS. 6, 9 and 10, the lower mounting device 34 includes a pair of upper and lower fixed brackets 48 fixed to a lower portion of the column 18 of the canopy 8, and a lower portion of the support member 35 of the tank base 32. A pair of fixed upper and lower movable brackets 49
And the fixed bracket 48 and the movable bracket 49
And a support shaft 50 penetrating through.

The upper and lower fixing brackets 48 are fixed to a fixing plate 51 fixed to the column 18 so as to protrude rearward, and the upper and lower fixing brackets 48 are connected by a reinforcing plate 52. The upper and lower movable brackets 4
9 is fixed to the support member 35 so as to project diagonally rightward from the support member 35 toward the front, is inserted between the fixed brackets 48, and is fixed to the upper and lower movable brackets 49 by fixed brackets. The cylindrical body 53 located between the 48 is fixed with the upper and lower movable brackets 49 penetrating therethrough.

The support shaft 50 is connected to the support shaft 3 of the upper mounting device 33.
9 has a vertical axis that is concentric with the vertical axis 9, and the upper and lower fixed brackets 48 and the cylindrical body 53 (upper and lower movable brackets 49) are provided in a penetrating manner. Also, the support shaft 50
A mounting plate 54 is fixed to the upper end side of the mounting bracket 54 in contact with the upper surface side of the upper fixing bracket 48, and the mounting plate 54 is fixed to the upper fixing bracket 48 by bolts 55 to prevent the support shaft 50 from coming off. Has been made. Therefore,
The tank table 32 is provided by the upper and lower mounting devices 33 and 34.
(On the right front side) is supported by the column 18 so as to be rotatable around the axis of the support shafts 39 and 50.

The upper and lower portions of the support member 35
Stoppers 46 and 5 that contact fixing brackets 37 and 48
The rotation of the tank base 32 and the water tank 31 about the support shafts 39 and 50 toward the front side (the direction indicated by the arrow B in FIG. 5) is restricted by the stoppers 46 and 56. (The tank table 32 is positioned). Further, by rotating the tank table 32 rightward (in the direction of arrow C in FIG. 5) about the axis of the support shafts 39 and 50,
As shown by phantom lines in FIG. 2, the tank table 32 and the water tank 31 are placed above the opening / closing section 12 of the hood 11 and the driver's seat 7.
The hood 11 can be retracted from the rear, whereby the opening / closing portion 12 (opening / closing cover 15) of the hood 11 can be opened and closed, and the rear view can be sufficiently secured.

As shown in FIGS. 3, 4, 5, and 6, the mounting table 36 of the tank table 32 is disposed in the left-right direction, and the right end of the mounting table 36 is fixed to the lower end of the supporting member 35. A rectangular frame comprising a frame member 57, left and right side frame members 58 extending rearward from the left and right ends of the front frame member 57, and a rear frame member 59 connecting the rear end sides of the left and right side frame members 58. It has a frame F and a mounting plate 60 fixed on the frame F to form a main structure. The upper side of the support member 35 and the rear side of the right side frame member 58 are connected by a reinforcing member 61, and the upper side of the support member 35 and the left side of the front frame member 57 are connected by a reinforcing member 62. .

The water tank 31 is mounted on a mounting plate 60 and is removably fixed via a pair of left and right bands 63 disposed before and after the water tank 31. Band 6
One end of the band 3 is fixed to a holding member 64 arranged on the upper surface side of the water tank 31, and the other end of the band 63 is
Fixed on the side. The other end of the front band 63 is fixed to a bolt 65 as shown in FIG.
5 penetrates an upper wall of the mounting plate 47 fixed on the mounting plate 60, and nuts 66 arranged above and below the upper wall.
Is screwed, so that the band 63 is attached so as to be fixedly fastened.

The other end of the rear band 63 is also fixed by the same structure. As shown in FIG. 18, the other end of the rear band 63 is also fixed to the bolt 65.
The band 63 is attached so that the band 63 can be tightened and fixed by inserting the mounting plate 60 and the rear frame member 59 and screwing nuts 66 arranged above and below the mounting plate 60 and the rear frame member 59. Have been. As shown in FIGS. 3, 4, and 11 to 16, the left front portion of the tank table 32 is supported by the support member 68, and the tank table 32 is provided between the support member 68 and the tank table 32. A lock device 69 is provided for restricting the rotation of the support shafts 39, 50 to the right (in the direction of arrow C in FIG. 5) around the axis.

The support member 68 is formed of a square tubular member, and is provided below the left front portion of the mounting table 36 and the bonnet 1.
15 and 16, a mounting plate 72 is fixed to the lower end side as shown in FIGS.
2 is attached and fixed to a support base 70 provided on the support frame 10 via bolts and nuts. The upper end side of the support member 68 is fixed to the fixed bonnet portion 1 of the bonnet 11.
As shown in FIGS. 11 and 12, a receiving plate 71 that supports the mounting table 36 is provided on the upper end side of the support member 68.

A receiving plate 71 is attached to the upper end of the support member 68 and is fixed to the mounting cylinder 73 via bolts and nuts.
It is fixed to the upper surface of. The receiving plate 7 of the mounting table 36
The portion mounted on the top 1 is provided with a backing plate 74 formed in an L-shape when viewed from the side, and fixed over and over the lower surface and the front surface of the front frame member 57. The rear surface of the upper surface of the receiving plate 71 is formed as an inclined surface that moves upward as it goes forward, and serves as a guide surface 75 when the mounting table 36 moves onto the receiving plate 71 from behind.

As shown in FIGS. 11 to 14, the lock device 69 is provided between a pair of upper and lower engaging portions 76 and 77 provided on the support member 68 side, and is interposed between the upper and lower engaging portions 76 and 77. The main configuration includes an engaged portion 78 and a lock pin 79 that penetrates both of the engaging portions 76 and 77 and the engaged portion 78. The lower engaging portion 77 is formed by integrally extending the receiving plate 71 forward, and the upper engaging portion 76 is formed in a downward open U-shape when viewed from the front.
It is constituted by an upper wall of a U-shaped plate fixed to the upper side.

The engaged portion 78 is provided with the upper and lower engaging portions 7.
6 and 77, and is constituted by a plate material fixed to the backing plate 74. In the use position of the water tank 31, the contact plate 74 is in contact with the upper engaging portion 76, and the front side of the support shaft 39, 50 of the tank table 32 around the axis (in the direction of arrow B in FIG. 5). ) Is restricted (the tank table 32 is positioned). Upper and lower engaging part 7
6 and 77 and the engaged portion 78 are formed with a vertical insertion hole 80 through which a lock pin 79 is inserted, and by inserting the lock pin 79 into the insertion hole 80,
The rotation of the support shafts 39, 50 to the right (in the direction of arrow C in FIG. 5) around the shaft center is restricted, and the lock pin 7 is inserted through the insertion hole 80.
By withdrawing 9, the rotation of the support shafts 39 and 50 of the tank table 32 around the shaft center to the right (the direction of arrow C in FIG. 5) is allowed.

A lower engaging portion 77 is provided at the lower end of the lock pin 79.
A retaining member 81 is provided for engaging with the lower surface of the lock pin 79 to prevent the lock pin 79 from coming off.
A spring 82 is compressed and interposed between 9a and the upper surface of the upper engaging portion 76 to urge the lock pin 79 upward. In addition, a slit 83 is formed on the lower side of the lock pin 79 upward from the lower end, and the retaining member 81
Is inserted into the slit 83, and is rotatably supported by a support shaft 84 substantially perpendicular to the slit 83 and formed of a spring pin or the like in the radial direction of the lock pin 79.

When the lock pin 79 is pushed downward against the urging force of the spring 82, the retaining member 81
When the locking member 81 is rotated about the support shaft 84, the locking member 81 can be accommodated in the slit 83. When the lock pin 79 is moved upward in this state, the locking is performed. The pin 79 can be removed from the insertion hole 80. The spring 82 is preferably locked to the lock pin 79 or the upper engagement portion 76 so as not to be lost when the lock pin 79 is pulled out.

Further, as shown in FIG.
On the bottom side of the center part in the front-rear direction on the right side, a concave portion 86 is formed, which is recessed from the side (right side). The import 87a side of the drain valve 87 is attached and fixed to the wall of the water tank 31 and is connected to a strainer 88 arranged at the bottom inside the water tank 87, and the water in the water tank 31 is supplied to the strainer 88. It is configured such that it can be sucked in through the outlet port and discharged from the out port 87b.

The out port 87 of the drain valve 87
The b side is connected to a pipe, a hose, etc., not shown, through which water is guided to a watering nozzle and the like, and water is sprayed on the road surface.

[0035]

According to the present invention, since the tank is provided above the hood behind the driver's seat, the tank can be mounted on a small-sized turning work machine without protruding greatly from the turntable. By making it possible to retreat from above the opening and closing portion of the hood, the opening and closing portion of the hood can be opened and closed vertically. Further, by making the tank retractable from the rear of the driver's seat, it is possible to secure the rear view.

Further, a tank base for mounting and supporting the tank is provided, and the front side on the other side in the left-right direction is supported rotatably about a vertical support shaft by a support member provided on the swivel base. The water tank can be easily retracted from the use position to the evacuation position by turning the tank table around the support shaft to the other side in the left-right direction so that the tank can be retracted from above the opening and closing portion of the bonnet. In addition, by providing a support member for supporting one side in the left-right direction of the tank table on the swivel table, a heavy water tank containing water at the use position can be supported, and even if it is cantilevered,
No inconvenience occurs.

[Brief description of the drawings]

FIG. 1 is a side view of a backhoe equipped with an asphalt planar.

FIG. 2 is a plan view of an upper swing body of the backhoe.

FIG. 3 is a side view of a main part.

FIG. 4 is a rear view of a main part.

FIG. 5 is a plan view of a water tank and a tank base.

FIG. 6 is a side view of the tank table.

FIG. 7 is a plan view of the upper mounting device.

FIG. 8 is a side sectional view of the upper mounting device.

FIG. 9 is a plan view of the lower mounting device.

FIG. 10 is a side sectional view of the lower mounting device.

FIG. 11 is a side sectional view of a left front portion of the tank base.

FIG. 12 is a rear view of the left front portion of the tank base.

FIG. 13 is a plan view of a left front portion of the tank base.

FIG. 14 is a front view of the lock device.

FIG. 15 is a side view showing the mounting structure of the lower part of the support member.

FIG. 16 is a rear view showing the mounting structure of the lower part of the support member.

FIG. 17 is a sectional view taken along the line DD in FIG. 5;

FIG. 18 is a side sectional view showing a mounting structure of a band on a rear side to which a water tank is mounted.

[Explanation of symbols]

 Reference Signs List 4 Working device 6 Revolving base 7 Driver's seat 11 Bonnet 12 Opening / closing part 18 Prop (supporting member) 31 Water tank (tank) 32 Tank base 39 Prop 50 Prop 68 Support

Claims (4)

[Claims] A hood covering an engine is provided at a rear portion of the swivel platform. A driver's seat is arranged on one side in the left and right direction on the revolving platform in front of the hood, and a base of a working device is provided on the other side in the left and right direction. A turning work machine, wherein a tank is provided above a hood behind a driver's seat, and the tank can be retracted from above an opening / closing portion of the hood. 2. The turning work machine according to claim 1, wherein the tank is retractable from behind the driver's seat. 3. A tank base for mounting and supporting the tank,
A front part on the other side in the left-right direction of the tank table is rotatably supported on a support member provided on the swivel table around a vertical support shaft,
The turning work machine according to claim 1 or 2, wherein the tank can be retracted from above the opening / closing portion of the bonnet by turning the tank table around the support shaft to the other side in the left-right direction. 4. The turning work machine according to claim 3, wherein a support member for supporting one side of the tank table in the left-right direction is provided on the turning table.