KR100585311B1 - The rotation-type hydraulic working machine - Google Patents

Abstract

On the swinging structure of the swing hydraulic actuating machine, the position of the directional valve (operating valve) can be changed to shorten the oil supply pipe, and the oil supply pipe can be contacted with the boom-side actuator and the swing motor without difficulty. Piping so that repair is also good.

In the small swing type hydraulic excavator (swivel hydraulic drive work machine) in which the hydraulic pump 10, the hydraulic oil tank 11, the fuel tank 12, and the operation valve 13 are disposed on the upper swinging structure 3, The operation valve 13 is installed so that the pipe connecting surface 13 'is obliquely directed from the all or rear position of the pivot center side toward the pivot center direction, and from the operation valve 13 to the actuator attached to the boom 5 in particular. The oil supply hoses 17a and 17b are piped in parallel along the upper surface of the boom 5 from the rear of the base of the boom 5.

Working machine

Description

Swivel Hydraulic Drive Work Machine {THE ROTATION-TYPE HYDRAULIC WORKING MACHINE}

1 is an external perspective view of a small swing hydraulic excavator according to the present embodiment;

2 is a partially cutaway plan view of the small swing hydraulic excavator according to the present embodiment;

3 is a view through the Z-Z line in FIG.

4 is a view through the X-X line of FIG.

5 is a plan view of the main parts of a small swing hydraulic excavator according to another embodiment;

Fig. 6 is a plan view showing an arrangement form of an upper swing body mounting mechanism in a conventional small swing hydraulic excavator.

Fig. 7 is a view of the piping state of the oil supply hose to the boom side in the conventional small swing type hydraulic excavator as seen from the front side;

Explanation of symbols on the main parts of the drawings

       1: hydraulic shovel 3: upper swinging body

       4: steering wheel (cab) 5: boom

       6: Arm 6a: Arm Operation Cylinder

       7: bucket 7a: bucket operation cylinder

       10: hydraulic pump 11: hydraulic oil tank

       12 fuel tank 13 operating valve

       13 ': Piping connection surface of operating valve 15: Slewing motor

       16: swivel joint 17a, 17b, 17c, 17d: oil supply hose

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hydraulically operated work machine such as a hydraulic excavator, and more particularly, to a swing hydraulic drive work machine configured to reasonably carry out oil supply piping to an actuator in a small swing work machine.

In general, in a hydraulically driven work machine, for example, a hydraulic excavator, an upper swinging structure freely swinging is provided on the lower traveling body, and the upper swinging body is freely undulated in front of the boom, arms and buckets, and the like. A work machine composed of work accessories is provided, and an operator's cab is arranged on one side, and an engine as a driving source such as a hydraulic motor is provided on the rear portion of the upper swing structure.

In this type of hydraulically driven work machine, a control valve (direction switch valve), a hydraulic oil tank for operating various hydraulic cylinders such as a boom cylinder and a turning hydraulic motor, etc., on the upper swing body according to the operation by an operating lever installed in the cab. The fuel tank is mounted. The upper swinging body on which such various apparatuses are mounted has a small swinging work machine, and in order to improve the workability in the narrow part, it is necessary to arrange the turning radius very small. We move and install.

Due to such circumstances, the equipment mounted on the upper swing body generally has a hydraulic pump (rear from the rear of the upper swing body 100 forward) at a position opposite to the steering wheel 104, as shown in FIG. 110), the driving engine 111, the hydraulic oil / fuel oil tank 112, and the lubrication direction switching valve (operating valve 113) to an actuator. As such a prior art, it is disclosed in Unexamined-Japanese-Patent No. 7-26438. Alternatively, as disclosed in Japanese Unexamined Patent Application Publication No. Hei 8-246500, it is known to arrange a directional valve and an oil tank next to the steering wheel at the front position of the engine.

However, although the device can be arranged in a narrow space, it must be piped through a bracket or the like, especially for piping from the directional valve to the actuator or swivel joint attached to the work machine boom. There is a problem.

Moreover, since the direction change valve 113 arrange | positioned on the upper turning body 100 is attached in the direction parallel to the axis line of a work machine boom, the oil supply hose piped from each port of a valve body is carried out of the boom. After starting close to the side, the pipes are run parallel to the top of the boom. Therefore, immediately at the base 102 side of the boom 101, as illustrated in FIG. 7, the oil supply hose 103 is outward, including the one that needs a margin capable of coping with the ups and downs of the boom 101. After greatly curving, the shape becomes an attachment shape parallel to the boom 101, whereby the oil supply hose 103 forms a bent portion A in a state of expanding outwards, whereby The accident of being caught by the bulged bent portion A of the lubrication hose 103 when the fuel is supplied to the oil lubrication hose 103 and the like, and the foreign matter protruding from the side at a narrow work site, etc. A) There is a risk of causing an accident to break in contact with A.

In addition, it is not preferable to complicate the oil supply pipe because the pressure loss in the pipe increases due to the length of the pipe and the increase in the number of bends. In addition, there is a problem in appearance that there is a bent portion in the state of expanding to the outside of the hose.

In addition, when the port of the directional valve is piped to the boom side, it is not a problem when the initial assembly of the machine, but the space between the valve body of the directional valve and the boom is small when the user repairs. In addition, it is difficult to attach or detach the pipe from the connection port of the valve, and workability is impaired.

The present invention has been made to solve such a problem, and it is possible to shorten the oil supply pipe by changing the attachment posture of the directional control valve (operation valve), and at the same time, the lubrication pipe can be connected to the boom actuator or the swing motor without difficulty. It is an object of the present invention to provide a swing hydraulic actuation work machine having a structure that can be brought into contact with a back pipe and can be piped so that repair can be performed well.

In order to achieve the above object, the swing-type hydraulic actuation work machine according to the present invention is a swing-type hydraulic actuation work machine in which a hydraulic pump, an oil tank, and an operation valve are disposed on an upper swinging body, wherein the operation valve is turned to the side of the pivot center. It is characterized in that the oblique installation in the front or rear position.

According to the present invention constituted as described above, the piping from the pipe connection portion of the operation valve to the respective actuators can be carried out in parallel along the upper swing structure, and the piping to the work machine boom side is also largely outward. Since the pipes can be paralleled along the boom without being curved, the length of each pipe can be shortened and the occurrence of pressure loss can be minimized. Moreover, since the piping (lubrication hose) to the said boom side is arrange | positioned by small rounding, without rounding outwards, an operator is not caught and it is not damaged. Of course, even if foreign matter protrudes from the outside, the effect which can eliminate the risk of damaging an oil supply hose is exhibited.

In addition, it is preferable that the operation valve is provided so that its pipe connecting surface is in the vicinity of the turning center direction. In this way, since the pipe connecting surface of the operation valve is not blocked by a boom or the like, a wide space can be obtained at the front part, so that a straight pipe can be used as a straight pipe without connecting the connection port of the operation valve with a curved pipe such as an elbow. In addition, the pipe to the swivel joint or the actuator attached to the work machine boom can be connected in the shortest distance. In addition, since the attachment of the oil supply hose to the actuator of the work machine boom distal end can be piped parallel to the upper surface from the base of the boom, the phenomenon of bulging outward by turning to the rear of the boom can be avoided, and It is possible to prevent the occurrence of obstacles in advance and further improve the apparent appearance. Of course, workability at the time of inspection and repair can also be improved, and the maintenance work can be ensured.

Embodiment of the invention

Next, the specific embodiment of the swing-type hydraulic drive work machine which concerns on this invention is described, referring drawings.

As an embodiment of the swing hydraulic drive work machine according to the present invention will be described a small swing hydraulic excavator. 1 is an external perspective view of the small swing hydraulic excavator according to the present embodiment in FIG. 1, and a partially cutaway plan view of the small swing hydraulic excavator according to the present embodiment in FIG. 2 is shown in FIG. 3 through the ZZ line in FIG. 2. This figure is shown in FIG. 4 through the XX line of FIG. 2, respectively.

The hydraulic excavator 1 is formed such that the upper swinging structure 3 is freely swingable on the lower traveling body 2, and the steering wheel 4 is mounted on one side of the upper swinging body 3. The boom 5 of the work machine is laid by the boom operation cylinder 5a so that the ups and downs are free. At the distal end of this boom 5, an arm 6 is attached to the bucket operation cylinder 7a, which is attached to the arm 6 by the arm operation cylinder 6a and the bucket 7 to the end of the arm 6. It is laid so that each can operate. In the figure, reference numeral 8 denotes a dosing braid.

In addition, a hydraulic pump 10 driven by an engine 9 mounted on the rear side is provided on the side opposite to the steering wheel 4 on the upper swing structure 3, and the hydraulic oil tank is located at the front position of the hydraulic pump 10. (11) and a fuel tank 12 for driving the engine are mounted, and a unit of the operation valve 13 is provided at the front position of the hydraulic oil tank 11 and the fuel tank 12. Moreover, the counterweight 14 is attached to the rear end of this upper swing body 3.

The operation valve 13 provided by such an arrangement includes each actuator (a bucket operation cylinder 7a attached to an arm operation cylinder 6a on the boom 5 and an arm 6 positioned at its tip), And valve units respectively connected to the swing motor 15 disposed on the swing body and the swivel joint 16 to the travel drive motor (not shown) of the lower travel body 2, and the pipe connection surface 13 ′) Is attached almost toward the center of pivot.

The piping from the operation valve 13 to the respective actuators in this manner is, for example, in the valve unit shown in FIG. 3, in order from the operation valve unit 13a of the arm operation cylinder 6a and the bucket operation. The operation valve unit 13b of the cylinder 7a, the operation valve unit 13c of the swing motor 15, and the operation valve unit 13d to the swivel joint 16 are arranged, and each of these valve units 13a, 13b, Lubrication hoses 17a, 17a, 17b, 17b, 17c, 17c, 17d, and 17d are connected to the respective ports of 13c and 13d by a known straight joint bracket (not shown). And each oil supply hose 17a, 17a, 17b, 17b from the operation valve unit 13a, 13b of the upper two stages turns to a turning center direction as it is, as shown to FIG. 2 and FIG. 4, and thereafter, a boom The piping is changed in direction so as to be parallel from the base of the boom 5 along the upper surface of the boom 5, and although not illustrated, the piping is connected to the pipe piping at an appropriate position on the upper surface of the boom 5. Moreover, the boom 5 so that the curved part a for the direction change in the vicinity of the base of the boom 5 of those oil supply hoses 17a, 17a, 17b, 17b can all respond to the ups and downs of the boom 5; Is bent behind.

Further, each of the oil supply hoses 17c, 17c, 17d, and 17d from the lower two stage operation valve units 13c and 13d extends toward the pivot center direction, and is the swing motor 15 or the swivel joint 16 as it is. Is connected to a connection port by a known joint bracket. Since these oil supply hoses 17c, 17c, 17d, and 17d can be piped almost linearly, they are connected by crossing the structure formed in the upper surface of the upper swing body 3 in the range which is easy. Therefore, a big rounded part is not formed.

As described above, since the pipe connecting surface 13 'of the operation valve 13 is provided toward the pivot center or its vicinity, the front space portion of the pipe connecting portion can be made wider than in the related art. Therefore, if the order at the time of the connecting operation of the lubrication hose for each operation valve unit is determined and performed, it can be connected without difficulty. As a matter of course, even when the oil supply hose is attached or detached for maintenance work or the like, the excessive resistance force due to the buckling of the oil supply hose does not operate at the connecting portion, so that workability is not lost. In addition, in this way, since the oil supply hose can be distributed from the operation valve 13 to each actuator, the oil supply hoses 17a, 17a, 17b, 17b to the actuator of the boom installation, in particular, Since it can be bent backwards to change direction, when the operator climbs on the swinging body and performs work in the oil supply operation to the fuel tank 12, the inspection of the hydraulic oil tank 11, etc., it contacts with the bent part a of the oil supply hose. No work is done, and no accidental damage to the oil supply hose is caused.

In addition, each of the oil supply hoses 17a, 17b, 17c, and 17d can shorten the piping from the operation valve 13 as described above, and does not constitute a complicated piping path, so that the pressure loss of the working oil is reduced. It is possible to obtain an effect that can reduce the In addition, since it is arranged behind the boom 5 in appearance, it helps to improve the design aesthetics that the appearance is improved.

Next, the main part top view of the small swing hydraulic excavator which concerns on other Example by FIG. 5 is shown. What is shown in this figure is another example which changed the arrangement conditions of the operation valve 13 of the actuator arrange | positioned on the upper swing body 3 in a hydraulic excavator similarly to the above. In addition, the same code | symbol is attached | subjected about the same thing as the said Example, and the detailed description is abbreviate | omitted.

In this embodiment, the operation valve 13 mounted on the upper swing body 3 on the opposite side of the operating table 4 mounting side is disposed close to the hydraulic pump 10, and the pipe connection surface 13 'is disposed. It is provided toward this pivot center direction. Therefore, the hydraulic oil tank 11 and the fuel tank 12 are provided in the front position from the position of the operation valve 13.

From the operation valve 13 on the upper swing structure 3 configured as described above to each actuator (arm operating cylinder 6a of the working machine, bucket operating cylinder 7a, swing motor 15, swivel joint 16) As the oil supply pipe (oil supply hose: 17a, 17a, 17b, 17b, 17c, 17c, 17d, 17d), as shown in Fig. 5, the pipe connecting surface 13 'of the operation valve 13 faces the pivot center direction. Since it is arrange | positioned, the front space can be taken largely and the piping to the turning motor 15 and the swivel joint 16 can be connected linearly similarly to the case of the said Example. In addition, the piping to the actuator attached to the boom has a margin to cope with the up and down movement of the boom 5 from the piping connection of the operation valve 13, and a gentle curved portion is formed at the rear of the base of the boom 5, and the boom is intact. After making parallel along the upper surface, it is connected with pipe piping (not shown) at the upper surface position of the boom 5.

By doing in this way, the same effect as the said Example can be acquired also in this Example.

As described above, in the present invention, in a swing hydraulic drive machine in which a hydraulic pump, an oil tank, and an operation valve are disposed on an upper swinging body, the operation valve is installed at an angle at all or the rear side of the pivot center side. . According to the present invention constituted as described above, the piping from the pipe connection portion of the operation valve to the respective actuators can be carried out in parallel along the upper swing structure, and the piping to the work machine boom side is also largely outward. Since the pipes can be paralleled along the boom without being curved, the length of each pipe can be shortened and the occurrence of pressure loss can be minimized. Moreover, since the piping (lubrication hose) to the said boom side is arrange | positioned by small rounding, without rounding outwards, an operator is not caught and it is not damaged. Of course, even if foreign matter protrudes from the outside, the effect which can eliminate the risk of damaging an oil supply hose is exhibited.

Moreover, in this invention, the said operation valve is provided so that the piping connection surface may face toward the rotation center direction. In this way, since the pipe connecting surface of the operation valve is not blocked by a boom or the like, a wide space can be obtained in the whole, so that it can be piped by a straight pipe without connecting the connection port of the operation valve with a curved pipe such as an elbow. The pipe to the swivel joint or actuator attached to the work machine boom can be connected in the shortest distance. In addition, since the attachment of the oil supply hose to the actuator of the work machine boom distal end can be piped parallel to the upper surface from the base of the boom, the phenomenon of bulging outward by turning to the rear of the boom can be avoided, and It is possible to prevent the occurrence of obstacles due to this, and furthermore, the effect of improving the apparent appearance can be obtained. Of course, workability at the time of inspection and repair can also be improved, and the maintenance work can be ensured.

Claims (2)

A swing hydraulic drive work machine in which a hydraulic pump, an oil tank, and an operation valve are disposed on an upper swing body, wherein the control valve is installed at an angle at all or the rear side of the swing center side. 2. The swing hydraulic actuation machine according to claim 1, wherein the operation valve is disposed so that its pipe connection surface is in the vicinity of the swing center direction.

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