JPH11336122A - Swing working machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To mount and arrange a control valve in a narrow space in a compact configuration by reducing the mounting area of the control valve on a swivel base when the control valve having a plurality of valve discs arrayed in one direction for a backhoe is mounted on the swivel base. SOLUTION: A swivel base 4 rotationally movable around an axial center in a vertical direction is provided on a travelling device and a control valve 35 is provided on the swivel base 4 for controlling a hydraulic equipment. The control valve 35 is arranged in such a manner that a plurality of valve discs 35A are arrayed in one direction and in an almost vertical direction.

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 used for civil engineering and construction work, and more specifically to a control valve device for controlling hydraulic pressure.

[0002]

2. Description of the Related Art In a turning work machine such as a backhoe for civil engineering and construction, hydraulic pressure is used as a driving source for a turning operation, a raising / lowering operation of a working tool, a swinging operation, and a dozer operation. The control valve is configured such that a hydraulic cylinder for moving a boom, an arm, a bucket, a dozer, and the like, and a valve body for controlling an actuator such as a hydraulic motor for moving a traveling device, a swivel table, and the like are arranged in one direction and connected to each other. A multiple valve type is adopted, and the control valve is generally mounted horizontally inside the swivel base.

[0003]

When the control valve is mounted horizontally, the proportion of the equipment occupied by the swivel base in the swivel base increases due to the large number of valve bodies. Since the engine, tank, etc. must be arranged in a limited space, the size of the fuselage including the turntable increases, and in particular, small-sized turning work that travels in a narrow space such as an alley and performs excavation work It was inconvenient for the machine. Conversely, it is difficult to place the control valve horizontally in a narrow space in the swivel of the small turning work machine, and the control valve has an operation link for operating a plurality of valve elements. A large number of cables are connected as relays, and hydraulic hoses for supplying and discharging pressure oil are connected.The inside of the swivel base has a complicated structure. The work of assembling the links and cables was difficult.

Accordingly, the present invention provides a control valve in which a plurality of valve elements are arranged in one direction by arranging the control valves such that the arrangement direction of the valve elements is substantially vertical. It is a main object to reduce a control valve mounting area (control valve occupation area) in a limited space.

[0005]

The technical means taken by the present invention to achieve the above object is that a swivel 4 which is rotatable about a vertical axis on a traveling device 2 is provided. The swivel 4 is provided with a control valve 35 for controlling hydraulic equipment. The control valve 35 has a plurality of valve elements 35A arranged in one direction, and the arrangement direction of the valve elements 35A is substantially vertical. The point is that it is arranged so that. As a result, the mounting area of the control valve 35 in the swivel base 4 is less likely to be enlarged in the horizontal direction of the swivel base 4, and the mounting area of the control valve 35 is reduced, so that the control valve 35 can be made compact in a small space. The devices such as the engine, the tank, and the battery can be efficiently arranged without increasing the size of the swivel 4.

Further, by disposing at least the upper portion of the control valve 35 so as to protrude above the upper surface of the swivel 4, maintenance of the control valve 35 can be performed in a large space above the swivel 4. In the above configuration, it is preferable that the arrangement space of the control valve 35 is covered by a cover body, the control valve 35 is accommodated in the cover body, and this cover body is mounted on the swivel so as to be freely opened and closed or detachable. The cover body may cover the control valve arrangement space above the swivel 4 or may constitute the outer surface of the swivel 4.

It is preferable from the viewpoint of maintenance that the control valve 35 is disposed on the outer peripheral side of the swivel base 4 and the surface 35C on which the pressure oil supply / discharge port is formed is directed outward in the horizontal direction. Further, according to the present invention, a swivel base 4 is provided on the traveling device 2 so as to be rotatable around a vertical axis, and on the swivel base 4, a driver's seat 22 and one of the left and right sides of the driver's seat 22 are provided. In the turning work machine provided with the tank 6 on the side,
The following technical measures have been taken to achieve the above objectives.

That is, the control valve device of the turning work machine according to the present invention comprises a plurality of valve elements 3 along the vertical surface of the tank 6.
It is characterized in that a control valve 35 in which 5A are vertically stacked is mounted. With such a configuration, the space occupied by the mounting of the control valve 35 is
Is not enlarged in the horizontal direction, so that not only the maneuvering floor is widened and maneuverability is improved, but also
The equipment such as the engine, the tank, and the battery could be efficiently arranged without increasing the size.

According to the present invention, the vertical bracket 4 is connected to the upper part of the tank 6 and the swivel base 4.
4, the control valve 35 is mounted, so that the weight of the control valve 35 is shared and supported by the tank 6 and the swivel base 4, and therefore, the tank 6, especially the working oil tank 31 This makes it easy to secure the strength of the portion that supports the shaft and shortens the path of the return pipe. Further, in the present invention, the operation link 3 for the control valve 35 and the valve body 35A is provided.
9 is connected to the upper part of the tank 6 and the swivel base 4, and a clearance 47 is formed between the bracket 44 and the upright surface of the tank 6, so that the bracket 44 is attached to the tank 44. 6 and the swivel 4, the control valve 35 and the operation link 39 can be assembled at the same time, and the gaps 47 are provided, so that the tank 6, particularly the hydraulic oil tank 31 and the control valve 3
The heat radiation area of No. 5 is sufficiently ensured, and it is unlikely that the oil temperature rises.

Further, according to the present invention, an inclined surface 31A extending forward is formed on the upright surface of the tank 6, and this inclined surface 31A is formed.
The operation link 39 of the valve body 35A is mounted so as to be rotatable around the vertical axis, and the bracket 44 on which the control valve 35 is vertically stacked is attached to the upper part of the tank 6 and the revolving table 4.
Thus, the operation cable 41 via the operation link 39 can be compactly arranged, and a sufficient foot space for the driver can be secured.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. In FIG. 8 showing the entire configuration, a turning work machine 1 exemplified by a backhoe has a swivel base 4 on a traveling device 2 shown by a pair of right and left crawler devices via a swivel bearing 3 in a vertical direction (vertical direction). ) Is rotatably supported at 360 ° (full rotation) around the axis O.
In addition, the swivel base 4 is generally formed by a frame in which a frame member made of a thick plate or the like, a reinforcing plate, a mounting plate, and the like are fixed on the substrate 11, and the outer surface is formed by the upper surface, the left and right side surfaces of the frame, It is composed of a thin plate material that appropriately covers the front surface.

The swivel 4 has an engine 5 and a tank 6
Are mounted, and a support frame 7 is provided upright over the engine 5. The engine 5 is covered with a hood 8 that can be freely opened and closed, and these components constitute a traveling body 9. On the right side of the engine 5, a hydraulic pump 50 for supplying hydraulic oil to hydraulic equipment is mounted. A work implement 10 is provided at the front of the swivel base 4 so as to be able to undulate and swing in the left-right direction. Specifically, a bracket 12 is protruded from a substrate 11 of the swivel base 4 and a swing shaft is attached to the bracket 12. A swing bracket 13 that rotates around the center P is mounted, a boom 14 is mounted on the bracket 13, an arm 16 having a bucket 15 is mounted on the boom 14, a boom cylinder 17 that moves the boom 14, and an arm 16 is moved. An arm cylinder 18 and a bucket cylinder 19 for moving the bucket 15 are provided.

The traveling machine 9 is provided with a maneuvering operation device 20, which is arranged on one side in the left-right direction (left side in the figure) at the front of the turntable 4, and A traveling lever 20A provided on a control floor 21 constituting an upper wall, a driver's seat 22 provided behind the traveling lever 20A, and a control stand 23 provided on both left and right sides of the driver's seat 22 A canopy 24 is provided above the driver's seat 22, and the canopy 24 is supported by the support frame 7 and the like. As shown in FIG. 6A, the support frame 7 has support bases 25 fixed at three places on the bottom of the revolving base 4 on the front left and right sides and the rear left side of the engine 5, respectively. The vertical columns 26 are erected, and the vertical columns 2 on the left and right sides as shown in FIG.
6 is connected by a beam 27 in the front-rear direction, and the beam 27 is connected to the vertical column 26 on the front right side by a beam 28 in the left-right direction, so that the engine 5 is formed in a portal shape when viewed from the front. While straddling, it straddles the surrounding of the radiator 29 on the left side.

As shown in FIG. 6, a side plate 30 extends left and right in the front-rear direction on the substrate 11 of the swivel table 4, and a partition plate RA extending in the left-right direction stands at the rear end of the side plate 30. The rear of the partition plate RA is an engine room R composed of a hood 8 and the like, and the engine 5 is housed in the room R. As shown in FIG. 7, a control floor 21 constituting the upper outer surface of the swivel table 4 is adhered on a horizontal plane on the left and right plates 30, and the left side (the right side in FIG. 4) of the floor 21 gets on and off. The mouth 21A is provided.

The revolving base 4 is formed into an arm shape by left and right side walls 4A constituting a side outer surface of the revolving base 4 and a front side wall 4B constituting a front outer surface. The tank 6 is arranged on each outer side. The right side of the tank 6 is a hydraulic oil tank 31 (pressure oil storage tank).
The left side is the fuel tank 32 and the hydraulic oil tank 31
Is disposed in front of the hydraulic pump 50, and is mounted on the substrate 11 of the swivel base 4 via a support base 33 and the like as shown in FIG.

Further, in the arrangement portion of the hydraulic oil tank 31,
The upper surface side of the swivel base 4 is not covered by the plate material and is open, and the hydraulic oil tank 31 is mounted on the control floor 21 (the swivel base 4).
The upper surface of the revolving base 4 is covered with a cover 34 that is open rearward and downward. On the other hand, the fuel tank 32 is housed inside the swivel base 4 having a bowl shape, and its upper portion including the fuel supply port 32A is protruded above the control floor 21 to increase the capacity.

As shown in FIGS. 6 and 7, a control valve (control valve) 35 having a rectangular parallelepiped shape is mounted on the front side of the hydraulic oil tank 31 in such a manner that the longitudinal direction thereof is vertical. A multi-valve 36 is mounted on the control floor 21 in the vicinity of the hydraulic oil tank 31 and a battery 37 is disposed in front of the fuel tank 32 to secure a right and left weight balance. It has a ring gear 3A driven by a motor 38. FIG.
Referring to FIG. 3, an inclined surface 31A which is enlarged forward is formed on the inner vertical surface of the hydraulic oil tank 31, and the mounting base 40 of the operation link 39 is welded or bolted to the inclined surface 31A. The mounting base 40 is provided with mounting engagement grooves 40A for operating cables 41 at intervals in the vertical direction.

A vertical support rod 42 is mounted on the upper and lower end plates 40B of the mounting table 40, and a plurality of operation links 39 are skewered on the support rod 42 to rotate around the vertical axis. When the operation link 39 is skewered, the cylinder collar 43 is interposed via the radial pin 43A to cause the link 39 to abut against each other (when one of the links is rotated, the other is linked). Unexpected rotation). On the front side of the hydraulic oil tank 31, a bracket 44 on which a control valve 35 formed by stacking a plurality of rectangular blocks 35B having valve bodies 35A is mounted.
Are mounted vertically along the vertical surface of the tank 31.

The control valve 35 mainly drives and controls hydraulic devices (motors for the left and right traveling devices 2, a turning motor, a boom cylinder, an arm cylinder, a bucket cylinder, a dozer cylinder, etc.). Valve body 35
A is arranged in one direction (in other words, the control valve 35 is a direct-acting spool-type switching valve configured by providing a rectangular block 35B with a valve body 35A made of a spool that slides in the axial direction. The valves B are arranged in a direction perpendicular to the sliding direction of the valve body 35A and are connected to each other). One hydraulic device is controlled by one valve body 35A.

The control valve 35 also incorporates a relief valve. The control valve 35 is provided with a valve body 35A.
The arrangement direction of the (valve B) is arranged in the up-down direction. The lower part of the control valve 35 is located in the swivel base 4, and the arrangement of the hydraulic oil tank 31 is also provided in the arrangement part of the control valve 35. Similarly to the portion, the upper surface side of the swivel base 4 is not covered with the plate material and is open, and the control valve 35 protrudes upward from the upper surface of the swivel base 4 from the middle to the upper part. By arranging the control valve 35 such that the arrangement direction of the valve body 35A is the vertical direction, the mounting area of the control valve 35 on the swivel 4 can be reduced, and the control valve 35 can be compactly arranged in a narrow space. , And the valve body 35A
Irrespective of the number, the mounting area of the control valve 35 on the swivel 4 can be made constant.

The arrangement space of the control valve 25 above the swivel 4 is covered by the cover 34, and the control valve 35 and the hydraulic oil tank 31 are accommodated in the cover 34. . As shown in FIG. 9, the lower end of the cover body 34 is attached to the upper surface side of the swivel base 4 by a hinge 51 or the like so as to be rotatable (vertically swingable) around a left-right axis. The cover 34 can be opened and closed by rotating the cover 34 around the pivot of the hinge 34 as shown by the phantom line in FIG. The arrangement space of the tank 31 is open, so that maintenance (control of relief pressure, inspection of oil leakage from a pressure oil supply / discharge port, etc.) of the control valve 35 can be performed in a wide space. .

The cover body 34 can be detached from the swivel 4 by sliding outward in the left-right direction, so that the front side of the control valve 35 can be easily maintained. The right and left outer side of the space in which the control valve 35 is arranged below the swivel base 4 is covered by a right side wall 4A (cover body) of the swivel base 4, and the side wall 4A forms a skeleton of the swivel base 4. It is detachably attached to the frame to be constituted, and by removing this side wall 4A, the lower portion of the control valve 35 can be easily maintained.

The valve body 35A of each valve B of the control valve 35 is slidable in the left-right direction, and the valve body of each valve B is perpendicular to the sliding direction of the valve body 35A. A pressure oil supply / discharge port is formed on one surface in a direction orthogonal to the 35A arrangement direction, and a surface 35C on which the pressure oil supply / discharge port is formed is positioned forward (outward in the horizontal direction).
The control valve 35 is disposed so as to face the surface 35C so that maintenance or the like of the surface 35C on which the pressure oil supply / discharge port is formed can be easily performed. The control valve 3
5 may be arranged so that the arrangement direction of the valve body 35A (valve B) is slightly inclined with respect to the vertical direction, and is arranged such that the arrangement direction of the valve body 35A is substantially vertical. It should just be.

Further, the entire control valve 35 may project upward from the upper surface of the swivel 4. In addition, the cover body 34 may be detachably attached and fixed to the swivel base 4 with bolts or the like. Furthermore, cover body 3
As shown in FIG. 11, a part (upper part in the figure) of the cover body 34 may be made openable / detachable or detachable / openable / detachable / detachable by a cover body 52. Further, as shown by a solid line in FIG.
5A may slide in the front-rear direction and the surface 35C on which the pressure oil supply / discharge port is formed may be disposed so as to face outward in the left-right direction, or as shown by a virtual line in FIG. ,
The valve body 35A slides in the horizontal direction inclined with respect to the front-rear direction, and the surface 35C on which the pressure oil supply / discharge port is formed is obliquely outward (or inward) between the front-rear direction and the left-right direction. )
May be arranged so as to face.

The control valve 35 may be arranged anywhere on the swivel 4, but it is preferable that the control valve 35 be arranged on the outer peripheral side of the swivel 4 in addition to the above-described location.
The surface 35C on which the discharge port is formed may be oriented in any direction, but is preferably oriented outward in the horizontal direction for maintenance. An operation link 39 is pivotally connected to one end of the valve body 35A via one pin 39A, and a cable 41 is pivotally connected to the other pin 39B. Therefore,
Cockpit 2 provided with cables 41 on both sides of driver's seat 22
The valve body 35A is slid in the left-right direction (on a horizontal plane) (as a relay) via the link 39 by being pushed and pulled by the third operation lever 23A, and the corresponding hydraulic device can be artificially remotely controlled.

The bracket 44 has an L-shape, one end of which is connected to the upper part of the tank 31 by bolts 45 with a spacer 44A interposed therebetween.
(Including a bracket fixed to the swivel 4) by bolts 46. That is, the valve body 35
Bracket 44 in which A is stacked vertically and mounted
Is vertically connected across the tank 31 and the swivel base 4, and in this connection state, a gap 47 is formed between the tank 31 and the swivel table 4, and the heat radiation area of each of the tank 31 and the control valve 35 is secured. .

The sub-assembly is provided by mounting the control valve 35 on the bracket 44, mounting the link 39 on the mounting base 40 via the support rod 42, and mounting the cable 41 via the groove 40A. In this state, the bracket 44 and the mounting base 44 can be attached.
What is necessary is just to pivotally connect the link 39 and the valve body 35A via 9A. As described above, the plurality of valve bodies 3 are attached to the bracket 44.
It is possible to assemble all at once with the 5A mounted, and not only the assembling accuracy is improved as compared with the case where the valve body 35A is individually assembled, but also the assembling becomes easier.

Similarly, the link 39 and the cable 41 are mounted on the mounting base 40, and can be assembled at once. With this configuration, the length of the hose 48 can be reduced, and the hose 48 can be made into a sub-assembly. 4 and 5 show another useful embodiment of the present invention, in which the bracket 4
4, the mounting base 40 is integrally attached to the valve body 35.
A and the link 39 are subassembled into a cable 41.
At the end with a pin 39B.

Since other structures are the same as those in FIGS. 1 to 3, common parts are indicated by common reference numerals. As shown in FIG. 6, by forming the inclined surface 31A in the tank 31, the link 39 can be mounted compactly, the foot of the driver's seat 22 can be widened, and the insertion window 32B of the cable 41 can be formed in the partition plate 32A. By temporarily passing the cable 41 through the engine room 32 and arranging the cable 41 at the lower part of the step (control floor), the bending radius of the cable 41 is increased, and the transmission of the operating force via the cable 41 is small and accurate. And cable 41
The durability has also improved.

[0030]

As described above in detail, according to the present invention, the mounting area of the control valve, in which a plurality of valve elements are arranged in one direction, on the swivel base can be reduced, so that the control valve 35 can be made compact in a small space. It can be arranged and other components can be efficiently mounted within the limited swivel range.

[Brief description of the drawings]

FIG. 1 shows a first embodiment of the present invention, in which (1) is an elevational side view and (2) is a perspective view of a main part.

FIG. 2 is a plan view of FIG.

FIG. 3 is another side view of FIG. 1;

FIG. 4 is a front view showing a second embodiment of the present invention.

FIG. 5 is a plan view of FIG. 4;

FIG. 6 shows a swivel (traveling body), (1) is a plan view,
(2) is a side view.

FIG. 7 is a front view of FIG. 6;

FIG. 8 is a side view of the turning work machine shown by a backhoe.

FIG. 9 is a partial cross-sectional side view of the traveling body.

FIG. 10 is a plan view showing a modification of the arrangement of the control valve.

FIG. 11 is a partial side sectional view showing a modification of the cover body.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 turning work machine 2 traveling device 4 turning table 6 tank 22 driver's seat 35 control valve 35A valve body 39 operation link 41 cable

 ──────────────────────────────────────────────────の Continued on the front page (72) Inventor Yoshio Nasu 64, Ishizukita-cho, Sakai City, Osaka Prefecture Inside the Kubota Sakai Plant (72) Inventor Takeshi 64, Ishizukitacho, Sakai City, Osaka Prefecture Kubota Sakai Manufacturing Co., Ltd. In-house (72) Inventor Hiroo Nakata 64 Ishizu-Kitacho, Sakai City, Osaka Prefecture Inside Kubota Sakai Works, Ltd. (72) Inventor Norihiro Aikawa 64, Ishizu-Kitamachi, Sakai City, Osaka Prefecture, Kubota Sakai Works

Claims (10)

[Claims] A turning table (4) rotatable about a vertical axis is provided on a traveling device (2), and a control valve (35) for controlling a hydraulic device is provided on the turning table (4). ), And the control valve (35) includes a plurality of valve elements (35).
(A) is arranged in one direction, and is arranged so that the arrangement direction of the valve body (35A) is substantially vertical. 2. The turning work machine according to claim 1, wherein at least an upper portion of the control valve (35) is disposed so as to protrude above an upper surface of the turning table (4). 3. The control valve according to claim 1, wherein a space in which the control valve is disposed is covered by a cover, and the cover is provided on the swivel so as to be openable and closable or detachable. 3. The turning work machine according to 2. 4. The turning work machine according to claim 3, wherein the cover body covers a control valve arrangement space above the turning table (4). 5. The turning working machine according to claim 3, wherein the cover body forms an outer surface of the turning table (4). 6. The control valve (35) is arranged on the outer peripheral side of the swivel (4), and the surface (35C) on which the pressure oil supply / discharge port is formed faces horizontally outward. The turning work machine according to any one of claims 1 to 5, characterized in that: 7. A swivel (4) is provided on the traveling device (2) so as to be rotatable around a vertical axis, and a driver's seat (22) and the driver's seat are provided on the swivel (4). (22) A turning work machine provided with a tank (6) on one side of the left and right sides of the tank (6).
A turning work machine characterized by mounting a control valve (35) in which A) is stacked substantially vertically. 8. A substantially vertical bracket (44) connected across the upper part of the tank (6) and the swivel base (4),
The turning machine according to claim 7, characterized in that a control valve (35) is mounted. 9. A bracket (44) equipped with a control valve (35) and an operation link (39) for a valve element (35A) is connected to an upper portion of a tank (6) and a swivel (4). The turning work machine according to claim 8, wherein a clearance (47) is formed between the bracket (44) and the upright surface of the tank (6). 10. An inclined surface (31A) extending forward is formed on the upright surface of the tank (6), and the operation link (39) of the valve element (35A) is formed on the inclined surface (31A) around the vertical axis. A bracket (44), which is mounted so as to be freely rotatable and has control valves (35) stacked substantially vertically, is connected over the upper part of the tank (6) and the swivel base (4). The turning work machine according to claim 7 or 8, wherein