JP3354845B2 - 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 turning work machine such as a backhoe.

[0002]

2. Description of the Related Art In a turning machine of this type, a turning table is generally provided on a traveling device so as to be rotatable around a vertical axis, and a hydraulic pump is connected to the turning table at one end in the left-right direction. Mounted engine, a hydraulic oil tank for supplying hydraulic oil to the hydraulic pump, and a control valve for distributing hydraulic oil from the hydraulic pump to various hydraulic working devices.

On the other hand, in the case of a small-turn turning work machine in which the rear side of the turntable does not protrude from the vehicle width of the traveling device, it is necessary to fit the rear side of the turntable into a circle having a diameter equal to the vehicle width. At the rear, the engine and the radiator and the hydraulic pump to be arranged in series with it are the best. For this reason, in a conventional small-swing turning machine, an engine having a hydraulic pump connected to the left and a radiator fan connected to the right is arranged laterally behind the turning table, and the hydraulic oil tank and the fuel tank are arranged in front of the turning table. The control valve is arranged on the front left side of the swivel table (for example, see Japanese Patent Application Laid-Open No. 8-302736).

[0004]

In the above-mentioned conventional turning working machine, the hydraulic pump is located at the rear left side of the swivel, the hydraulic oil tank is located at the right front of the swivel, and the control valve is located at the front left of the swivel. In addition, since the main equipment required for hydraulic drive (hereinafter referred to as hydraulic equipment) is distributed and arranged in separate parts of the swivel, the hydraulic piping for connecting them becomes longer, and material cost and cost are reduced. There is a disadvantage that the manufacturing cost is high.

[0005] Further, if the hydraulic equipment is distributed to each part of the swivel base, various parts of the hood must be opened and closed when performing maintenance and inspection of the hydraulic equipment in a concentrated manner. Maintenance work was complicated. In view of such circumstances, the present invention concentrates hydraulic equipment including a hydraulic pump, a hydraulic oil tank, and a control valve at one end in the left-right direction of a swivel, and provides hydraulic piping necessary for the hydraulic equipment. The aim is to shorten the length of the equipment as much as possible and to enable the intensive maintenance and inspection of the hydraulic equipment.

[0006]

In order to achieve the above object,
The present invention has taken the following technical measures. That is, according to the present invention, a swivel is provided on the traveling device so as to be rotatable around an axis in a vertical direction, and an engine connected to a hydraulic pump at one end in the left-right direction is disposed laterally at a rear portion of the swivel. A hydraulic oil tank for supplying hydraulic oil to the hydraulic pump, a control valve for distributing hydraulic oil from the hydraulic pump to various hydraulic working devices, and a seat mounted on the swivel ,
The hydraulic oil tank is located on a hydraulic pump side of the swivel table.
And in front of the hydraulic pump, wherein the seat is
From the opposite side of the hydraulic oil tank in the horizontal direction on the swivel base
The control valve is located in the hydraulic oil tank.
It is arranged vertically in front, and is located on the front side of the control valve.
A walk-through is formed on the swivel .

In this case, an engine having a hydraulic pump connected to one end in the left-right direction is located laterally behind the swivel,
In addition, since the hydraulic oil tank and the control valve are located at the front of the hydraulic pump and at the hydraulic pump side of the swivel base, the hydraulic equipment including the hydraulic pump, the hydraulic oil tank, and the control valve is disposed at one end of the swivel base in the left-right direction. It will be arranged in a concentrated manner.

For this reason, the hydraulic piping for connecting the hydraulic equipment to each other can be shortened, and the bonnet covering these equipment is opened only on one side in the left-right direction, so that the hydraulic equipment can be intensively inspected. become able to. In the above-mentioned present invention, since the purpose is to centrally arrange each hydraulic-related device, the control valve only needs to be close to the hydraulic oil tank, and the positional relationship between them is not particularly limited.

However, the fact that the control valve, which has a higher necessity for maintenance and inspection than the hydraulic oil tank, is hidden behind the hydraulic oil tank makes it difficult to perform maintenance and inspection work on the hydraulic-related equipment as a whole, which is not preferable. . Therefore, the control valve is avoided where the hydraulic oil tank is in the way when the maintenance such as lower and right and left directions inside the hydraulic oil tank, it is preferably located towards front of the hydraulic oil tank.

Further, in the case where the control valve towards front of the hydraulic oil tank is preferably mounted on the side surface of the hydraulic oil tank is disposed of the same valve vertically. In this case, since the control valve is vertically oriented and its installation area is very small, the valve or hydraulic oil tank can be arranged at the rear of the swivel base, and the walkthrough formed at the front of the swivel base should be as wide as possible. Can be.

As described above, according to the present invention, since the hydraulic equipment including the hydraulic pump, the hydraulic oil tank, and the control valve is intensively arranged at one end in the left-right direction of the swivel base, the left-right direction of the swivel base and the like are reduced. A wide arrangement space remains on the end side. Therefore, in the present invention, by disposing the fuel tank at the end of the swivel table on the side opposite to the hydraulic pump, it is possible to secure a large capacity of the fuel tank by utilizing a wide arrangement space at the other end in the left-right direction of the swivel table. I have to.

In the present invention, if a hydraulic oil filter, an unload valve and a fuel filter are attached to the hydraulic oil tank, maintenance and inspection of these members can be performed intensively, and assembly of these members can be performed. Man-hours can be reduced.

[0013]

Embodiments of the present invention will be described below with reference to the drawings. The drawing shows a small turning backhoe 1 exemplified as a turning work machine. In FIG. 1, the backhoe 1 is mainly composed of a traveling device 2, a revolving unit 3, and an excavating device 4.

Hereinafter, the traveling direction of the backhoe 1 (the left-right direction in FIG. 1) is referred to as the front-rear direction, and the lateral direction orthogonal to the front-rear direction (the direction penetrating the plane of FIG. 1) is referred to as the left-right direction.
As shown in FIG. 1, the traveling device 2 employs a crawler traveling device in which a pair of left and right crawler traveling members 5 having rubber crawler belts are provided, and these traveling members 5 are driven by a traveling motor M. . A dozer 6 is provided at the front of the traveling device 2.
Is provided.

The revolving unit 3 includes a revolving table 7 rotatably supported on a bearing 8 provided at a central portion between the left and right crawler traveling units 5 of the traveling device 2 so as to be rotatable around a revolving axis in a vertical direction. The hood 20 includes a hood 20 that covers various devices mounted on the base 7, and a cabin 42 that covers a seat 41 provided on the hood 20 and a control section in front of the hood 20. The revolving base 7 is configured by covering a frame formed by combining a frame material having a front part and a middle part with a plate material with a cover member, and the rear part of the revolving base 7 is fixed to the frame and the revolving base 7 is fixed.
And a counterweight 9 for balancing the weight with the excavator 4 at the front of the vehicle.

The turntable 7 is turned around a turning axis X by a turn motor 10 (see FIG. 2) supported by a frame of the turntable 7. The backhoe 1 is of a so-called small backward swing type, and is formed in an arc shape so that the rear side surface of the swing body 3 does not protrude from the vehicle width of the traveling device 2. That is, when the revolving unit 3 turns, the turning trajectory drawn by the rear surface of the revolving unit 3 falls within the left and right widths of the left and right crawler traveling units 5.

As shown in FIG. 2, the left and right side surfaces of the revolving unit 3 are formed on a plane extending in the front-rear direction with the revolving unit 3 facing forward, and the interval between the left and right side surfaces is It is formed narrower than the diameter of the turning locus circle drawn by the rear surface. Further, in the same state, the front surface of the revolving unit 3 is formed in a plane along the left-right direction, and the left side is slightly projected forward from the right side.

As shown in FIG. 1, a pair of upper and lower support members 11 for supporting the excavator 4 project from the front right side of the swivel 7. A swing bracket 12 is pivotally attached to the support member 11 via a support shaft so as to freely swing left and right around a vertical axis. The swing bracket 12 is provided with a swing cylinder 13 provided inside the swivel 7 (see FIGS. 4 and 5). (See Reference).

The excavator 4 includes a boom 1 whose base is pivotally attached to a swing bracket 12 so as to be swingable about the left and right axes.
4, an arm 15 pivotally attached to the distal end side of the boom 14 so as to be swingable about the left and right axes, and a bucket 16 attached to the distal end side of the arm 15 so as to be free to dump. The boom 14 is swung by a boom cylinder 17 provided between the swing bracket 12 and the middle of the boom 14, and the arm 15 is provided with an arm cylinder 18 provided between the middle of the boom 14 and the base of the arm 15. The bucket 16 is squeezed and dumped by the bucket cylinder 19 provided between the base of the arm 15 and the mounting link of the bucket 16.

The rear upper surface and the right upper surface of the swivel 7 are open, and these open portions are covered with a rounded bonnet 20 projecting upward from the upper surface of the swivel 7. Inside the hood 20, an engine 21 and
Hydraulic pumps 23 for driving various hydraulic devices, hydraulic equipment including a hydraulic oil tank 24 and a control valve 25, a radiator 26, and the like are housed, and these are mounted on the swivel 7. The left upper surface of the swivel 7 is covered with a floor sheet, in which a fuel tank 22 for the engine 21 and a battery 27 are stored.

As shown in FIG. 2 and FIG.
Is disposed laterally at the rear of the swivel 7 so that the drive axis thereof is oriented in the left-right direction. A hydraulic pump 23 is directly connected to a lower right portion of the engine 21, and a radiator fan 28 is connected to an upper left portion of the engine 21. The lower shaft that drives the hydraulic pump 23 and the upper shaft that drives the radiator fan 28 are linked by a belt transmission mechanism including a fan belt 29 and a pulley.

A silencer 30 is connected to the upper right side of the engine 21, and a reserve tank 31 for cooling water of the radiator 26 is provided behind the engine 21. In addition, a swivel joint 32 is provided at the center of rotation of the swivel 7, and the swivel motor 10 is disposed in front of and slightly to the left of the joint 32.
Each of the control valves 25 is connected by a hydraulic line 33.

On the left side of the radiator fan 28, various heat exchangers, that is, the radiator 26, the oil cooler 34, and the condenser 35 of the air conditioner are arranged in this order from the left side. Of these, the oil cooler 34 cools the return oil from the control valve 25 and
The condenser 35 is an outdoor unit of an air conditioner (air conditioner) in the cabin 42.

The bonnet 2 corresponding to these heat exchangers
An outside air intake 36 (see FIG. 1) is formed on the left side of the hood 20, and an exhaust port (not shown) is formed on the right side of the bonnet 20. Thus, the backhoe 1 of the present embodiment employs a suction type in which the radiator 26 and the radiator fan 28 are disposed immediately inside the outside air intake 36.

The hydraulic oil tank 24 and the control valve 25 are arranged on the right side of the swivel 7 (on the same side as the hydraulic pump 23) and in front of the hydraulic pump 23. That is, the hydraulic oil tank 24 and the control valve 25
Are arranged intensively on the right side of the swivel 7 together with the hydraulic pump 23, so that the hydraulic piping for connecting the main equipment (hydraulic equipment) required for the hydraulic drive to each other is made as short as possible. Main equipment can be intensively maintained and inspected.

As shown in FIGS. 2, 4 and 5, the control valve 25 is directly connected to the front side of the hydraulic oil tank 24 in a vertically oriented state, and the front end face 25A of the control valve 25 is shifted as far back as possible. In this state, the walk-through 37 formed at the front of the swivel 7 is made as wide as possible. When the control valve 25 is arranged on the front side of the hydraulic oil tank 24, the valve 25 is relatively close to the swivel joint 32 and the swing motor 10, so that the piping for these can be shortened.

In the illustrated example, the control valve 25
Is mounted on the front side surface of the hydraulic oil tank 24. The valve 25 may be provided between the hydraulic oil tank 24 and the hydraulic pump 23, further to the right of the hydraulic oil tank 24, or above the hydraulic oil tank 24. it can. These positions are preferable because the hydraulic oil tank 24 does not hinder the maintenance and inspection of the control valve 25.

The hydraulic oil tank 24 includes a hydraulic oil filter 38, an unload valve 39, and a fuel filter 40.
Are mounted in a suspended state (see FIG. 4), whereby maintenance and inspection of those members can be performed intensively, and the number of assembling steps for those members can be reduced. As shown in FIGS. 2 and 3, a support frame 44 formed substantially in a gate shape in a front view is provided upright at the rear portion of the swivel 7 so as to straddle the engine 21 in the left-right direction. The lower surface of the hood 20 and the rear support of the cabin 42 are fixed to the frame 44, and the air cleaner 4 for sending the cleaning air to the engine 21.
5 is attached.

The support frame 44 includes a horizontal beam 46 having a hollow inside, and a pair of left and right support members 47 and 48 for supporting both left and right ends of the horizontal beam 46. The left end of the horizontal beam 46 is on the left side surface of the bonnet 20. At a position close to the outside air intake port 36. On the other hand, the air cleaner 45 is attached to the right side of the cross beam 46 via a bracket 49 or obliquely. This air cleaner 4
The exhaust port 5 is connected to the front side of the engine 21 via an outlet pipe 50, and the intake port of the air cleaner 45 is connected to the cross beam 46 via a bent pipe 51 bent in a square shape.

Accordingly, a part of the fresh air flowing from the outside air intake 36 reaches the right end from the left end of the cross beam 46 and is supplied to the air cleaner 45 through the curved pipe 51. As described above, since the cross beam 46 of the support frame 44 also has a function as an intake pipe of the air cleaner 45, the number of parts is reduced by that much, and the rear part of the swivel 7 is made compact. Can be.

The left and right support members 47 of the support frame 44,
48, the right column member 47 is formed of a substantially inverted L-shaped column member in a side view, and the left column member 48 is formed.
As shown in FIG. 3, a support frame 52 is formed in a substantially inverted U-shape in a side view. That is, the support frame 52 is formed in an inverted U-shape so as to be divided into two parts in the front and rear, and is less likely to be deformed in the front and rear direction than a simple rod-shaped support.

Therefore, even if vibration from the engine 21, the radiator fan 28, the hydraulic pump 23, or the like is transmitted to the support frame 52 through the swivel 7, the cross beam 45 fixed to the upper end resonates back and forth. Bonnet 2 which is prevented and thus attached to its cross beam 45
Zero and vibration of the cabin 42 can be suppressed as low as possible.

As shown in FIG. 2, the support frame 52
The rear portion 53 is bent in a substantially U-shape in plan view along the rear side surface of the bonnet 20, so that even in the hood 20 where the position of the rear side surface is limited due to small turning, The interval between the forks of the support frame 52 is made as wide as possible. As shown in FIG. 2, the support frame 52 is disposed so as to cover the radiator 26, the oil cooler 34, and the condenser 35 from above, and also functions as a protector for protecting these heat exchangers. . In this case, if the swivel 7 is equipped with a canopy instead of the cabin 42, no air conditioner is required.
Is omitted.

In the illustrated example, the left and right support members 47, 48 are provided.
Although the case where the support frame 52 is adopted only on the left side is illustrated, the support frame 52 can be adopted only on the right support member 47, and both the left and right support members 47,
The support frame 52 can also be adopted as 48. The bonnet 18 is made of a resin or a thin steel plate, and includes a right cover 54 that covers the control valve 25, the hydraulic oil tank 24, the hydraulic pump 23, and the like, a rear cover 55 that covers the rear half of the engine 19, and heat from the radiator 26 and the like. And a left cover portion 56 for covering a portion of the exchanger. Of these cover portions, the rear cover portion 55 is supported by a cross beam 46 of the support frame 44 via a hinge so as to be vertically rotatable, and by opening the rear cover portion 26, the engine 1
8 and its surroundings can be maintained and inspected.

In this embodiment, since all the hydraulic equipment including the hydraulic pump 23, the hydraulic oil tank 24, and the control valve 25 are concentrated on the right end side of the swivel 7 as shown in FIG. The fuel tank 22 and the battery 27 are arranged on the left end side of the swivel table 7 while the fuel tank 22 and the battery 27 are arranged at the left side of the swivel table 7. That is, the fuel tank 22 is disposed so as to lie in a relatively wide range from the left side of the swivel base 7 and below the seat 41, and includes the main tank portion 57 which is out of the plane range of the bonnet 20. By arranging the fuel tank 22 in a wide area on the opposite side to the hydraulic oil tank 24 in this manner, the left and right weight balance of the swivel 7 is effectively ensured while ensuring a large capacity of the tank 22. Like that.

Further, at the rear end of the main tank portion 57,
An extension 58 extending to the rear of the swivel 7 and away from the seat 41 is integrally connected, and a fuel filler port 59 is formed in the extension 58. For this reason, the seat 41 does not become a hindrance when refueling from the refueling port 59, and the refueling operation is facilitated. As shown in FIGS. 2 and 3, the seat 41 is housed in a concave portion 60 formed in the upper part of the front surface of the hood 20, and is disposed on the left side of the swivel 7 so as to be located above the radiator 26 and the radiator fan 28. Thus, the cool air from the outside air intake 36 always flows under the seat 41. For this reason, the heat generation from the engine 21 is prevented from being directly radiated to the seat, and the comfort in summer is prevented from being deteriorated.

The radiator 26 has a radiator fan 2 so that its center R is lower than the fan center F.
8, the recess 60 of the bonnet 20 is formed deeper than before by the eccentricity of the radiator 26. Therefore, despite the fact that the seat 41 is arranged above the radiator 26, the seat 4
1 can be installed as low as possible, thereby preventing the weight balance of the swivel 7 from being deteriorated due to the height of the height.

An extension pipe 62 extending to the rear cover 55 of the bonnet 20 is connected to the upper tank 61 of the radiator 26, and a water supply port 63 is provided at the end of the extension pipe 62. Therefore, water can be supplied from the water supply port 63 by opening the openable rear cover 55, and the seat 41 does not interfere with the supply of water to the radiator 26.

In this embodiment, the case where the present invention is applied to the backhoe 1 that makes a small backward turn is illustrated. However, the present invention is directed to the case where the excavator 4 protrudes from the vehicle width of the traveling device 2 when the excavator 4 ascends most. It can also be used for the backhoe 1 that does not have a very small turning.

[0040]

As described above, according to the present invention,
Hydraulic pumps, hydraulic oil tanks, and control valves are concentrated at one end in the left and right direction of the swivel, so the hydraulic piping required for the hydraulic pumps can be shortened as much as possible. Equipment can be intensively maintained and inspected.

[Brief description of the drawings]

FIG. 1 is an overall side view of a small turning backhoe (turning machine).

FIG. 2 is a plan view showing an internal mechanism of the rotating body.

FIG. 3 is a left side view showing an internal mechanism of the rotating body.

FIG. 4 is a right side view showing an internal mechanism of the rotating body.

FIG. 5 is a front view showing an internal mechanism of the rotating body.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Small turning backhoe (turning work machine) 2 Traveling device 7 Turning table 21 Engine 22 Fuel tank 23 Hydraulic pump 24 Hydraulic oil tank 25 Control valve 38 Hydraulic oil filter 39 Unload valve 40 Fuel filter

──────────────────────────────────────────────────続 き Continued on front page (72) Inventor Kazuhiko Ikeuchi 64 Ishizu-Kitacho, Sakai City, Osaka Prefecture Inside Kubota Sakai Works Co., Ltd. (72) Inventor Toshihiko Takemura 64 Ishizukita-machi, Sakai City, Osaka Prefecture Kubota Sakai Manufacturing In-house (72) Inventor Kazuomi Sugiyama 64 Ishizu-Kitacho, Sakai City, Osaka Prefecture Inside Kubota Sakai Works, Ltd. (72) Inventor Hiroo Nakata 64 Ishizu-Kitamachi, Sakai City, Osaka Prefecture Inside Kubota Sakai Works, Ltd. (56) Reference Document JP-A 8-199624 (JP, A) JP-A 7-180178 (JP, A) JP-A 9-144062 (JP, A) JP-A 9-53530 (JP, A) JP-A 64-64 9023 (JP, A) JP-A-10-18347 (JP, A) JP-A-10-114969 (JP, A) JP-A 5-22651 (JP, U) JP-A 6-30247 (JP, U) Actual opening Hei 6-30248 (JP, U) Japanese Utility Model Application Hei 6-30250 (JP, U) Japanese Utility Model Application Showa 61-97461 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) E02F 9/00 E02F 9/08

Claims (4)

(57) [Claims] 1. A swivel base on a travel device (2) (7) is provided rotatably in the vertical direction about the axis, the swivel slide
An engine (21) provided with a drilling device (4) at the right front of (7) and an oil pressure pump (23) connected to the right side.
Is disposed laterally at the rear of the swivel (7), and supplies a hydraulic oil tank (2) for supplying hydraulic oil to the hydraulic pump (23).
4), a control valve (25) for distributing hydraulic oil from the hydraulic pump (23) to various hydraulic working devices, and a seat (41) are mounted on the swivel (7), and the hydraulic oil tank ( 24) is disposed on the right side of the swivel table (7) and in front of the hydraulic pump (23), and the seat (41) is located on the left side of the hydraulic oil tank (24) in the swivel table (7). And the control valve (25) is operated
It is arranged vertically between the oil tank (24) and the drilling rig (4) and just before the hydraulic oil tank (24) .
The control valve (25) and the drilling device (4)
Swivel work machine, wherein the this <br/> the front swivel slide of the control valve (25) (7) walkthrough (37) is formed thereon with the. 2. A swivel (7) on a traveling device (2).
This turntable is provided rotatably around the axis of the
A drilling device (4) is provided at the right front of (7),
Engine (21) with pressure pump (23) connected to the right
Is disposed laterally at the rear of the turntable (7), and the oil
Hydraulic oil tank (2) for supplying hydraulic oil to the pressure pump (23)
4) and the hydraulic oil from the hydraulic pump (23)
Control valve (25) for distribution to work equipment
The seat (41) is mounted on the swivel (7), and
The oil tank (24) is provided with a hydraulic pump on the right side of the swivel (7).
Lamp (23), and the seat (41) is
The left side of the hydraulic oil tank (24) in the turning table (7)
And the control valve (25) is operated
Hydraulic oil between the oil tank (24) and the drilling rig (4)
It is directly connected to the front of the tank (24) in a vertical state.
The control valve (25) and the drilling device (4)
Between the control valve (25) and hydraulic oil tank
A bonnet (18) covering the hook (24) is arranged.
Turning table between bonnet (18) and drilling rig (4)
(7) The walk-through (37) is formed on
A turning work machine characterized by the above . 3. A fuel tank (2) is further provided in the swivel (7).
2) is mounted, and this fuel tank (22)
(7) placed at the end on the side opposite to the hydraulic pump (23).
The turning work machine according to claim 1, wherein the turning work machine is provided. 4. A hydraulic oil tank (24) is provided with a hydraulic oil fill.
(38), unload valve (39) and fuel fill
The turning work machine according to any one of claims 1 to 3, further comprising a tab (40) .