JP3403633B2 - Turning work machine - Google Patents

Description

Detailed Description of the Invention

[0001]

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

[0002]

2. Description of the Related Art In this type of swivel working machine, generally, a swivel base is provided on a traveling device via a swivel bearing so as to be rotatable about an axis in the vertical direction. An engine device (including an engine and auxiliary equipment connected thereto), a fuel tank, a battery, a hydraulic oil tank, a swing motor, a hydraulic pump, a control valve and the like are mounted. On the other hand, in a turning machine with a small turn in which the rear side of the swivel does not extend beyond the vehicle width of the traveling device, the rear side of the swivel needs to be placed within a circle with the vehicle width as the diameter, so It is best to place the engine and the radiator and hydraulic pump that should be placed in series with it.

Therefore, conventionally, as a layout of main components in a swivel in a so-called small backward swivel working machine, an engine having a hydraulic pump connected to the left side and a radiator fan connected to the right side is placed laterally at the rear of the swivel. The hydraulic oil tank and the fuel tank are arranged on the front right side of the swivel base, and the control valve is arranged on the front left side of the swivel base (for example, Japanese Patent Laid-Open No. 9-1890).
46).

[0004]

However, in the conventional swivel work machine described above, the selection of the main components in the swivel base and the layout thereof are determined on the assumption that the swivel work machine makes a small rearward turn. Even turning machines of the same weight class,
For different types of revolving work machines with different revolving trajectories of the revolving base, the models and layouts of the main components are all different. That is, the following three types (A) to (C) are known as the swivel types of this type of swivel work machine, but conventionally, even in swivel work machines of almost the same weight class, these types are known. For at least two types, there is no idea that the types and layouts of the main components in the swivel are shared, and the types and layouts of the main components in the swivel are individually designed for each type.

(A) A standard type in which the rear side of the swivel protrudes from the vehicle width of the traveling device (B) A rear small turn in which the rear side of the swivel does not protrude from the vehicle width of the traveling device (C) Only the rear side of the swivel In addition, the excavation equipment at the maximum ascent does not extend beyond the vehicle width of the traveling equipment.Therefore, conventional swivel work machines have high material cost and manufacturing cost even though they are almost the same weight class. In addition, since there are variations in the performance of maintenance work and heat balance in the swivel machine between different types of swivel machines having different swivel trajectories of the swivel base, the user's handling instruction is also complicated.

In view of the above situation, the present invention makes the material cost and manufacturing by sharing the main constituent parts in the swivel base and the layout thereof among different types of swivel work machines having different swirl trajectories of the swivel base. The objective is to reduce costs and homogenize performance and maintenance to facilitate handling.

[0007]

[Means for Solving the Problems] In order to achieve the above object,
The present invention has taken the following technical means. That is, in the present invention, a swivel base is provided on a traveling device so as to be rotatable about a vertical axis through a swivel bearing, and an engine device and a swivel motor are mounted inside the swivel base .
The swivel base has a pair of vertical ribs fixed on the frame substrate.
The left and right vertical ribs are attached to the fixed support brackets at the tips.
The excavator is swingably supported, and
The vertical ribs are tilted to extend outward in the left-right direction toward the rear.
The slanted part and the parallel part that extends rearward from the rear end of this slanted part
Minutes and the left and right vertical ribs are formed integrally with each other.
The support bracket is equipped with a swingable excavator.
And different types of revolving work machines with different revolving trajectories
They are formed in the same shape, and the engine device, swing bearing and swing motor are used for the swingable excavation.
The same type of rotating working machine equipped with a device and having different swivel trajectories of the swivel base is used.

In this case, since the engine device, the slewing bearing and the slewing motor are shared between different types of swivel work machines having different swivel trajectories of the swivel base, different types of engine devices and swivel machines are used between the different types of swivel work machines. The material cost and the manufacturing cost can be reduced as compared with the case where the bearing and the swing motor are adopted. It should be noted that the different types of revolving work machines having different revolving trajectories of the revolving base are described in (A) to
There are three types of (C), equipped with a swingable excavation device of these three types,
Make common between different types of turning machines with different marks
You can

In the present invention, when a fuel tank, a battery, a hydraulic oil tank, a hydraulic pump and a control valve are further installed inside the swivel base,
At least one of the fuel tank, battery, hydraulic oil tank, hydraulic pump and control valve,
It is possible to use the same type of turning working machine equipped with the swinging excavator and having different turning trajectories of the turning base. In this case, a swinging excavator
Since different types of swivel work machines with different swivel trajectories have at least one of the above main components in common, different types of swivel work machines use different types. Material cost and manufacturing cost can be reduced as compared with the case of performing.

Further, the present invention provides not only standardization of the above-mentioned main components themselves but also standardization of their layout within the swivel base. That is, according to the present invention, a swivel base is provided on a traveling device so as to be rotatable about a vertical axis through a swivel bearing.
Inside the swivel deck, the engine, a fuel tank, a battery, a hydraulic oil tank, the turning motor, hydraulic pump and the control valve is mounted, which are the Su
It is provided inside the swivel with the same layout as in the case of different types of swivel working machines having a swivel excavating device and having different swivel trajectories of the swivel.

In this case, a swing excavator is provided.
However, between different types of revolving work machines with different revolving trajectories of the revolving base, the engine device, fuel tank, battery, hydraulic oil tank, revolving motor, hydraulic pump, and control valve are arranged inside the revolving base in the same layout. Therefore, it is easy to standardize these members themselves, and the heat balance in the swivel base and the maintenance method of each main component are almost the same between different types of swivel machines, so performance and maintenance are homogenized. can do.

The above-mentioned "same layout" means that the layout relationship among the main constituent parts is relatively the same, and the mounting position with respect to the center of rotation and the absolute distance between the parts are the same. Not all are required to be exactly the same. The concrete layout, the engine unit is disposed further rearward than the pivot bearing, placing the swivel motor above the pivot bearing,
The fuel tank, the battery, the hydraulic pump, the hydraulic oil tank, and the control valve may be separately arranged on the left and right sides of the slewing bearing.

In this case, it is preferable that the hydraulic oil tank and the control valve are arranged in front of the hydraulic pump connected to one end of the engine device. With this configuration, the hydraulic equipment including the hydraulic pump, the hydraulic oil tank, and the control valve, which are necessary for hydraulic drive, are centrally arranged on one end side of the engine device. The piping can be made as short as possible, and maintenance and inspection of these hydraulic related equipment can be performed intensively. As described above, in the present invention,
Since the layout of each main component in the swivel base is the same, the swivel frame is provided on the traveling device via the swivel bearing so as to be rotatable about the vertical axis. , The bonnet mounted on the revolving frame, the bonnet covering each main component is also the swing excavating equipment.
It can be configured with the same components as those of different types of revolving work machines that are equipped with a table and have different revolving loci of the revolving base.

Further, in the present invention, the seat provided on the upper part of the bonnet and the supporting frame for supporting the bonnet are equipped with the swinging excavator.
In particular , the same thing as that of different kinds of turning work machines having different turning trajectories of the turning base can be used.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. The drawings show a backhoe illustrated as a swivel work machine, and FIGS. 1 to 3 show different types of backhoes 1A to 1C having different swivel trajectories of a swivel base that conform to the common concept of the present invention. These backhoes 1A to 1C are of 4 to 5 ton class having almost the same weight class. Of these, FIG. 1 shows a backhoe 1A of a standard type (hereinafter, simply referred to as a “standard type”) in which the rear side of the swivel base 9 protrudes from the vehicle width of the traveling device 2, and FIG. The backhoe 1B is shown in a small rearward turn (hereinafter simply referred to as "rearward small turn") whose side surface does not extend beyond the vehicle width of the traveling device 2.

In addition, in FIG. 3, not only the rear side surface of the swivel base 9 but also the excavation device 4 at the maximum rise does not extend beyond the vehicle width of the traveling device 2 (hereinafter, simply referred to as "ultra-small turn"). The backhoe 1C is shown. 1 to 3, the hatched portion shows a portion common only to the standard type and the rear small turning backhoes 1A and 1B, and the mesh portion indicates all the standard type, rear small turning and ultra-small turning backhoes 1A to 1B. 1C
Shows the common parts. In the following, the running direction of the backhoes 1A to 1C (the left-right direction in FIG. 1A) is referred to as the front-rear direction, and the lateral direction orthogonal to the front-rear direction (the paper penetration direction in FIG. 1A) is the left-right direction. Say.

1 to 3, various backhoes 1
A to 1C are mainly composed of a traveling device 2, a revolving structure 3, and an excavation device 4. The traveling device 2 is a truck frame 5
It is configured by providing a pair of left and right crawler traveling bodies 6 having rubber crawler tracks on both left and right sides, and a crawler type traveling device in which these traveling bodies 6 are driven by a traveling motor (not shown) is adopted. ing. This traveling device 2
A dozer 7 is provided in the front part of the. The revolving structure 3 includes a revolving base 9 rotatably supported on the track frame 5 of the traveling device 2 via a revolving bearing 8 about a revolving axis in the vertical direction, and various devices mounted on the revolving base 9. A hood 10 for covering and a seat 1 provided on the hood 10.
And a canopy 12 that covers the first and the like from above.

The swivel base 9 is constructed by covering the periphery of a swivel frame 13 (see FIGS. 4 to 6) formed by combining various frame materials on a base plate with a frame cover 14, and at the rear part of the swivel base 9. A counterweight 15 is provided which is fixed to the rear edge of the revolving frame 13 and balances the weight of the excavation device 4 and the like in front of the revolving base 9. Further, the swivel base 9 includes the swivel frame 13 described above.
A turning motor 16 provided at the central portion of the is used to turn about the turning axis X. That is, the drive gear of the turning motor 16 is meshed with the gear portion formed on the inner diameter surface of the turning bearing 8 on the traveling device 2 side. Therefore, by driving the turning motor 16, the turning base 9 rotates about the turning axis X. Turn to.

In the standard backhoe 1A shown in FIG. 1, the rear side surface of the revolving superstructure 3 is formed in an arc shape, and the center of turning X is set so that the rear side surface protrudes from the vehicle width of the traveling device 2.
Is set from the front of the swivel base 9 (see FIG. 4).
On the other hand, the backhoe 1B having a small rear turn shown in FIG.
In order to prevent the arc-shaped rear side surface of the revolving structure 3 from protruding from the vehicle width of the traveling device 2, the revolving center X is set at the center of the revolving base 9 (see FIG. 5). That is, when the revolving unit 3 revolves, the revolving locus drawn by the rear surface of the revolving unit 3 falls within the width of the left and right crawler traveling units 6.

As shown in FIGS. 1 (b) and 2 (b),
In these standard type and rear small turning backhoes 1A and 1B, the left and right side surfaces of the revolving structure 3 are formed in a plane along the front-rear direction with the revolving structure 3 facing forward, and the space between these left and right side surfaces is formed. Is formed to be narrower than the diameter of the circle of the turning trajectory drawn by the rear surface of the turning body 3. Further, in the same state, the front surface of the revolving structure 3 is formed into a flat surface along the left-right direction.
A pair of upper and lower support brackets 17 that support the excavation device 4 project from the front right side of the swivel base 9.
A swing bracket 18 is pivotally attached to the support bracket 17 via a support shaft so as to be swingable right and left around a vertical axis, and the swing bracket 18 is swingable in the left and right directions by a swing cylinder 19 provided inside the swivel base 9. To be done.

The excavator 4 has a boom 2 whose base is pivotally attached to a swing bracket 18 so as to be swingable about left and right axes.
0, a vertical movement arm 21 pivotally attached to the tip end side of the boom 20 so as to be vertically swingable, and a bucket 22 attached to the tip end side of the vertical movement arm 21 so as to be freely squeezed and dumped. The boom 20 has a swing bracket 18
Cylinder 2 provided between the boom and the middle of the boom 20
3, the up-and-down moving arm 21 is moved by the boom 20.
The bucket 22 is swung by the arm cylinder 24 provided between the middle part of the vertical movement arm 21 and the base of the vertical movement arm 21, and the bucket 22 is moved by the bucket cylinder 25 provided between the base of the vertical movement arm 21 and the attachment link of the bucket 22. Squid dumped.

On the other hand, the backhoe 1 of the ultra-small turn shown in FIG.
In C, the turning center X is set at the center of the turning base 9 so that the arc-shaped rear side surface of the turning body 3 does not protrude from the vehicle width of the traveling device 2 (see FIG. 6), and at the time of maximum rise. In order that the excavator 4 also does not protrude from the vehicle width of the traveling device 2, the base end portion of the excavator 4 is provided inside the swivel base 9 between the pair of left and right support walls 26 (see FIG. 6) standing upright opposite to each other. It is pivotally attached.
Therefore, when the revolving structure 3 revolves, the revolving path drawn by the rear surface of the revolving structure 3 falls within the left and right widths of the left and right crawler traveling bodies 5, and the revolving path drawn by the tip of the excavation device 4 in the highest lift state. Also fits within the left and right width of the left and right crawler traveling body 5.

Further, in the case of the backhoe 1C having an extremely small turn, the boom 20 is pivotally mounted between the pair of left and right support walls 26 so as to be vertically movable, and the boom 20 itself cannot swing to the left and right. Therefore, a parallel link mechanism 27 is provided at the tip of the boom 20, the vertical movement arm 21 is pivotally attached to the mechanism 27 so as to be vertically swingable, and the parallel link mechanism 27 is horizontally swung by the offset cylinder 19A. Thus, the left and right positions of the bucket 22 can be changed. Next, the internal structure of the revolving unit 3 will be described with reference to FIGS. 4 to 6.

The rear upper surface and the right upper surface of the swivel base 9 are open, and these open portions project upward from the upper surface of the swivel base 9 and have a rounded bonnet 10 ( FIGS. 1 to 3,
(See FIG. 7). Inside the bonnet 10, an engine device 31 including an engine 28, a radiator 29 of its auxiliary equipment, an oil cooler 30 and the like, a hydraulic pump 32 for driving various hydraulic devices, and a hydraulic oil tank 33.
The hydraulic equipment including the control valve 34 and the control valve 34 are housed and mounted on the swivel base 9. The upper left side of the swivel base 9 is covered with a floor sheet, and a fuel tank 35 for the engine 28 and a battery 36 are housed in this portion.

The engine 28 is laterally arranged at the rear of the swivel base 9 so that its drive axis is oriented in the left-right direction.
The hydraulic pump 32 is directly connected to the lower right side of the engine 28, and the radiator fan 37 is connected to the upper left side of the engine 28.
Are connected. A lower shaft that drives the hydraulic pump 32 and an upper shaft that drives the radiator fan 37 are interlockingly connected by a belt transmission mechanism including a fan belt and a pulley. The swivel base 9 is fixed to the frame cover 14 around the swivel frame 13, and the swivel bearing 8 is fixed to the swivel center of the swivel frame 13. A swivel joint storage hole 38 is provided in the swivel center of the swivel frame 13, and the swivel motor 16 is disposed near the storage hole 38. The swivel joint and the turning motor 16 are connected to the control valve 34 by hydraulic pipes, respectively.

On the left side of the radiator fan 37, various heat exchangers, that is, the radiator 29 and the oil cooler 30 are sequentially arranged. Of these, the oil cooler 30 cools the return oil from the control valve 34 and returns it to the hydraulic oil tank 33. When a cabin is installed instead of the canopy 12, the condenser of the air conditioner in the cabin is further connected to the radiator fan 3
It can be added to the left side of 7. An outside air intake (not shown) is formed on the left side surface of the bonnet 10 corresponding to these heat exchangers, and an exhaust port (not shown) is formed on the right side surface of the bonnet 10. Therefore, the backhoes 1A to 1C of the present embodiment employ a suction type in which the radiator 29 and the radiator fan 27 are arranged immediately inside the outside air intake port.

As shown in FIGS. 4 to 6, in this embodiment, the engine device 28, the fuel tank 35, and the battery 3 are used.
6, the hydraulic oil tank 33, the swing motor 16, the hydraulic pump 32, and the control valve 33 have the same layout in all the backhoes 1A to 1B of the standard type, the rear small swing and the ultra-small swing in which the swivel loci of the swivel base 9 are different from each other. Therefore, it is arranged inside the swivel base 9.
A more specific arrangement relationship in this case will be described with reference to the relative position with respect to the slewing bearing 8. The engine device 31 is arranged behind the slewing bearing 8, the slewing motor 16 is arranged above the slewing bearing 8, and the fuel tank The battery 35, the battery 36, the hydraulic pump 32, the hydraulic oil tank 33, and the control valve 34 are arranged separately on the left and right sides of the slewing bearing 8.

In the standard type backhoe 1A, the slewing bearing 8 is arranged on the front side of the swivel base 9,
Since there is no room in the front space of the slewing motor 16, the slewing motor 16 is arranged on the rear side of the slewing bearing 8 as shown in FIG. On the other hand, in the backhoes 1B and 1C of the rear small turn and the ultra-small turn, the swivel bearing 8 is arranged on the center side of the swivel base 9 and it is necessary to avoid interference with the engine device 31. Rotating motor 16 as shown in
Is arranged to the left of the front side of the slewing bearing 8.

Among the main components in the swivel base 9, the hydraulic oil tank 33 and the control valve 34 are on the right side (the same side as the hydraulic pump 32) of the swivel base 9 and the hydraulic pump 32.
It is located in front of. That is, the hydraulic oil tank 33
The control valve 34 and the control valve 34 are centrally arranged on the right side of the swivel base 9 together with the hydraulic pump 32, so that the main equipment (hydraulic-related equipment) necessary for these hydraulic drives.
The hydraulic pipes that connect the two to each other are made as short as possible, and the main equipment can be maintained and inspected intensively.

As shown in FIG. 4 and FIG. 5, in the standard type and the small backward swiveling backhoes 1A and 1B, the control valve 34 is directly connected to the front side surface of the hydraulic oil tank 33 in a vertical state, and the control valve The walkthrough (passage space through which the operator can pass) formed in the front part of the swivel base 9 is set to be as wide as possible by making the position 34 as close to the rear as possible. When the control valve 34 is arranged on the front side surface of the hydraulic oil tank 33 as described above, the valve 34 becomes relatively close to the swivel joint and the turning motor 10, so that the pipes for them can be shortened.

On the other hand, as shown in FIG. 6, in the backhoe 1C of ultra-small turning, the control valve 34 is fixed to the right side surface of the support wall 26 provided upright on the turning frame 13. In the illustrated example, the control valve 34 is attached to the front side surface of the hydraulic oil tank 24 or the right side surface of the support wall 26. However, the valve 34 is provided between the hydraulic oil tank 33 and the hydraulic pump 32, or the hydraulic oil tank 32. It may be provided on the further right side of the tank 33 or above the hydraulic oil tank 33. These positions are suitable because the hydraulic oil tank 33 does not interfere with the maintenance and inspection of the control valve 34.

Further, in the present embodiment, the hydraulic pump 32,
Since all hydraulic equipment including the hydraulic oil tank 33 and the control valve 34 are intensively arranged on the right end side of the swivel base 9, the seat 11 is arranged on the left side of the swivel base 9, and the fuel tank 35 and the battery 36 are arranged. Is arranged on the left end side of the swivel base 9. As shown in FIGS. 4 and 5, in the case of the standard type and the rear small turning backhoes 1A and 1B, a pair of left and right vertical ribs 39 and 40 are provided upright on the turning frame 13 to increase its rigidity. The front ends of the left and right vertical ribs 39 and 40 are the support brackets 17.
And a parallel portion 42 extending rearward from the inclined portion 41. Rear ends of the parallel portion 42 are connected to each other by a lateral rib 43 extending in the width direction.

The shapes of the support bracket 17 and the inclined portions 41 of the left and right vertical ribs 39, 40 fixed to the support bracket 17 are set to be the same for the standard type and the rear small turning backhoes 1A, 1B. It can be used for both.
That is, in this embodiment, the parallel portions 42 of the vertical ribs 39 and 40 shown in FIG. 4 used in the standard backhoe 1A.
By cutting off, it is also used as the vertical ribs 39, 40 of the backhoe 1B which makes a small rearward turn. On the other hand, in the case of the backhoe 1C that makes a very small turn, the support wall 26 functions as a reinforcing member for the turning frame 13.

As shown in FIG. 7, the bonnet 10 includes a left cover portion 44 extending from the rear left side of the swivel base 9 to the center side.
And a right cover part 45 connected to the right end of the left cover part 44, and a rear cover part 47 pivotably attached to the rear opening of the left cover part 44 via a hinge 46 so as to be openable and closable. . Of these, the left cover portion 44 is the engine device 31.
Is formed long in the left-right direction so as to cover the upper part from the left side to the right side, and the right cover part 45 is formed long in the front-rear direction so as to cover the part extending from the hydraulic pump 32 to the control valve 34. An inspection window 48 such as the hydraulic oil tank 33 is pivotally mounted on the upper surface of the right cover portion 45.

The rear portion of the bonnet 10 is supported from below by a supporting frame 50 on a rectangular frame which is erected on the rear portion of the revolving frame 13 so as to straddle the engine device 31. At the upper front of the left cover part 44, the seat 1
A storage recess 49 for storing the rear portion of the seat 1 is formed, and the seat 1
1 is arranged on the left side of the swivel base 9 so as to be located above the radiator 29 and the radiator fan 37. Therefore, the cool air from the outside air intake of the bonnet 10 always flows under the seat 11, so that the engine 28
It is prevented that the heat generated from the heat is directly radiated to the seat 11, and the comfortability in the summertime is prevented from being deteriorated.

The accommodating recess 49 of the seat 11 allows the seat 11 to be set at various positions inside thereof.
It is formed with a margin larger than the width. In the case of the standard type backhoe 1A, the seat 11 is arranged in front of the storage recess 49 shown in the broken line position in FIG. On the other hand, in the case of the backhoe 1A that makes a small turn to the rear, the front-rear length of the turning frame 13 is smaller than that of the standard type, so that the seat 11 is located behind the storage recess 49 shown by the alternate long and short dash line position in FIG. Will be placed.

Further, in the case of the backhoe 1C having an extremely small turn, the turning frame 1 is provided by the amount of the support wall 26 provided.
Since there is not enough room in the right side space of seat 3, seat 11 is shown in FIG.
Is arranged behind and from the left side of the storage recess 49 shown by the two-dot chain line position. Next, main components common to the present embodiment will be described. First, as shown by mesh portions in FIGS. 1 to 3, the seat 11 and the hood 1
No. 0 left cover portion 44 and rear cover portion 45, and the support frame 50 supporting the rear portion of the bonnet 10 are all standard type, rear small turning and ultra small turning backhoes 1A to 1C.
The same members are used for.

On the other hand, the traveling device 2, the excavating device 4 (including the swing bracket 18), the right cover portion 45 of the bonnet 10 and the canopy 12 are made of the same members for the standard type and the rear small turning backhoes 1A and 1B. Although it is used, a different member is used for the backhoe 1C having a very small turn. Of these, the ultra-small turning excavator 4 cannot be used also as the standard type or rear small turning excavator 4 when the parallel link mechanism 27 is provided. Further, in the ultra-small turning backhoe 1C, the right side surface of the bonnet 10 needs to be formed in an arc shape, unlike the case of the standard type or the small rearward turning. Therefore, as shown in FIG. 45 is a right cover part 4 for exclusive use in ultra-small turning
5C is attached to the left cover portion 44.

Further, the canopy 12 can be used for both the standard type and the rear small turning backhoes 1A and 1B, since the same members can be used because they are mounted sideways on the rear part of the hood 10, but in the case of the ultrasmall turning backhoe 1C. Uses the canopy 12C dedicated to the ultra-small turn in order to mount the canopy 12 vertically. On the other hand, in the present embodiment, the planar layouts of the main components provided on the swivel base 9 are arranged to be the same for all three types of backhoes 1A-1B (see FIGS. 4-6). It was possible to use the same members as much as possible for the main constituent parts themselves.

That is, in the present embodiment, among the main components provided on the swivel base 9, the engine 28, the engine device 31 including this auxiliary machine, the swivel bearing 8 and the swivel motor 16, the fuel tank 35, and the battery 36.
And a hydraulic pump 32 directly connected to the engine 28,
The control valve 34 uses the same member for all the backhoes 1A to 1C of the standard type, the small backward swing and the ultra-small turn. The accessory of the engine 28 may include a muffler and an air cleaner in addition to the radiator 29 and the oil cooler 30. Further, in the present embodiment, the hydraulic oil tank 33 uses the same members for the standard type and the rear small turning backhoes 1A and 1B, but uses different shapes for the ultra small turning backhoe 1C.

The reason for this is that, in the case of the ultra-small turn, the space on the right side of the turning frame 13 does not have enough space for providing the support wall 26, so that the tank is made smaller than the standard type or the backward small turn. Because it was necessary. Of course, this hydraulic oil tank 33 can also be shared by three types of backhoes 1A to 1C by using a small tank for ultra-small turning as the standard type and small backward turning backhoes 1A and 1B. The present invention is not limited to the above embodiment. That is, in the above embodiment,
Most of the main components mounted inside the swivel base 9 are made common to the same members, but it is also possible to make common to some of these members.

Not only when all three types of backhoes 1A to 1C are used in common, but also two types of backhoes (for example, standard type and small rear swing) like the canopy 12 and the hydraulic oil tank 33, for example. The present invention also includes the case where the main constituent parts are shared only for 1A and 1B.

[0043]

As described above, according to the present invention,
Main components in the swivel platform and their layout are shared between different types of swivel machines with different swivel trajectories, which reduces material cost and manufacturing cost, and homogenizes performance and maintenance. It is possible to facilitate the handling of the user.

[Brief description of drawings]

FIG. 1A is an overall side view of a standard backhoe, and FIG. 1B is a plan view of the backhoe.

FIG. 2 (a) is an overall side view of a backhoe that makes a small rearward turn, and FIG. 2 (b) is a plan view of the backhoe.

FIG. 3 (a) is an overall side view of a super-small turning backhoe, and FIG. 3 (b) is a plan view of the backhoe.

FIG. 4 is a plan view showing the internal structure of a revolving structure mounted on a standard backhoe.

FIG. 5 is a plan view showing an internal structure of a revolving structure mounted on a backhoe that makes a small rearward swing.

FIG. 6 is a plan view showing an internal structure of a revolving superstructure mounted on a backhoe for ultra-small turning.

FIG. 7 is a plan view of the bonnet.

[Explanation of symbols]

1A standard backhoe 1B Backhoe with small rear turn 1C Ultra-small turning backhoe 2 traveling devices 8 slewing bearing 9 swivels 10 bonnet 11 seats 13 swivel frames 16 turning motor 31 engine equipment 32 hydraulic pump 33 hydraulic oil tank 34 control valve 35 fuel tank 36 batteries 41 Left cover 37 Rear cover part 50 support frame

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kazuhiko Ikeuchi 64 Ishizukita-cho, Sakai City, Osaka Prefecture Kubota Corporation Sakai Factory (72) Inventor Toshihiko Takemura 64, Ishizukita-machi, Sakai City, Osaka Prefecture Kubota Sakai Manufacturing Co., Ltd. In-house (56) References JP-A-11-81374 (JP, A) JP-A-8-246506 (JP, A) JP-A-8-246508 (JP, A) Actual Kai-hei 6-30247 (JP, U) Actual Kaihei 5-40359 (JP, U) Actual Kohei 1-24204 (JP, Y2) (58) Fields investigated (Int.Cl. ⁷ , DB name) E02F 9/08 E02F 9/00 E02F 3/32

Claims (7)

(57) [Claims] 1. A swivel base (9) is provided on a traveling device (2) so as to be rotatable about a vertical axis through a swivel bearing (8), and inside the swivel base (9), The engine device (31) and the swing motor (16) are installed ,
The swivel base (9) is on the left and right on the frame substrate (13A).
A pair of vertical ribs (39, 40) are fixed, and these left and right vertical ribs
Support bracket (17) fixed to the tip of (39, 40)
The excavator (4) is swingably supported on the
The left and right vertical ribs (39, 40) are rearward
An inclined portion (41) extending outward in the left-right direction and the inclined portion
A parallel part (42) extending rearward from the rear end of the minute (41)
Of the vertical ribs (39, 40) are formed integrally with each other.
The sloped portion (41) and the support bracket (17) are
The swivel base (9) is equipped with a free excavator (4).
It has the same shape as that of different types of turning work machines with different turning trajectories.
Made which are, the engine unit (31), swing bearing (8) and the turning motor (16), said swing
A swivel work machine comprising the same excavator (4) as that of a heterogeneous swivel work machine having different swivel trajectories of the swivel base (9). Inside of claim 2, wherein the swivel base (9), further, a fuel tank (35), battery (36), hydraulic oil tank (33), the hydraulic pump (32) and control valve (34) is mounted Tei Te, characterized in that the at least one of the said swivel table (9) as the same as the turning locus of the turning work machine of different heterogeneous are used
The swivel work machine according to claim 1. Inside of 3. Before SL swivel base (9), the engine unit (31), a fuel tank (35), batteries (3
6), hydraulic oil tank (33), swing motor (16),
A hydraulic pump (32) and a control valve (34) are mounted , and these are the swingable excavator.
Rotary working machine according to claim 1 or 2, characterized in that the turning locus are placed in the same layout as the case of the swivel work machine different heterologous of turning comprise a (4) board (9). 4. The engine device (31) is arranged rearward of the slewing bearing (8), the slewing motor (16) is arranged above the slewing bearing (8), and the fuel tank (35). , batteries (36), a hydraulic pump (32), hydraulic oil tank (33) and control valve (34) is characterized by being disposed distributedly to the left and right both sides of the pivot bearing (8)請<br The swing working machine according to claim 2 or 3. Wherein said hydraulic oil tank (33) and control valve (34) and characterized in that it is arranged in front of the engine unit said hydraulic pump connected to one end of (31) (32) The swivel work machine according to claim 4. 6. The swivel base (9) is an engine device (3 ).
1) provided with a bonnet (10) surrounding the, the bonnet (10), said swing freely rig
Any of claims 1 to 5, characterized in that it is provided with (4) and is composed of the same components (44, 47) as those of different types of revolving work machines having different revolving loci of the revolving base (9). A swivel work machine described in Crab. 7. A seat (11) provided on an upper portion of the bonnet (10) and a support frame (50) for supporting the bonnet (10) are the swingable excavator.
(4) that the same is used as the turning trajectory of the swivel base (9) have a have different heterologous of rotary working machine
The swivel work machine according to claim 6, wherein: