JP2004116197A - Hose device and working machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a hose device 49b facilitating connection working without needing any other piping device even when it has a restriction detouring a swivel joint 44. <P>SOLUTION: One end of a bending hose 52 is attached to the edge of a hose body 51 having flexibility. The bending hose 52 has bent parts 54 and 55 on one end side and the other end side respectively, and is formed into a substantially U-shape having a straight line part 56 between the bent parts 54 and 55. A joint 73 coupled to the swivel joint 44 is provided on the other end of the bending hose 52. The hose body 51 is introduced from a direction of one peripheral face side of the swivel joint 44, and the bending hose 52 is connected to the other peripheral face side of the swivel joint 44. The restriction detouring the swivel joint 44 exists, the other piping device is not needed, and the connection working is facilitated. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a hose device connected to a swivel joint of a working machine, and a working machine including the hose device.
[0002]
[Prior art]
In general, a hydraulic shovel as a working machine includes a lower traveling body that is capable of self-traveling, and an upper revolving superstructure is rotatably provided above the lower traveling body. A swivel joint is disposed at the center of rotation of the upper revolving unit, and the swivel joint enables the flow of hydraulic oil between the lower traveling unit and the upper revolving unit that revolves (for example, see Patent Document 1).
[0003]
For example, as shown in FIGS. 5 and 6, an upper swing body 2 is provided so as to be able to swing above the lower running body 1, and a swivel joint 3 is arranged at the swing center of the upper swing body 2. The swivel joint 3 is attached to the lower traveling body 1 with an outer cylinder 4 attached to the upper revolving structure 2 and a part protruding from a lower portion of the outer cylinder 4 while being rotatable inside the outer cylinder 4. The inner cylinder 5 is provided. A plurality of hose connection portions 6a and 6b are provided on one side and the other side of the peripheral surface of the outer cylinder 4, and a plurality of hose connection portions 6c are provided on the peripheral surface of the inner cylinder 5.
[0004]
A control valve device 7 to which hydraulic oil is supplied from a hydraulic pump (not shown) is installed in the upper revolving unit 2, and a space between the control valve device 7 and each hose connection portion 6 a, 6 b of the outer cylinder 4 of the swivel joint 3 is provided. The hoses 8a and 8b are connected. The lower traveling body 1 is provided with traveling devices 10 on both sides having traveling motors 9 operated by hydraulic oil. The traveling motors 9 of the traveling devices 10 on both sides and the respective hose connection portions 6c of the inner cylinder 5 of the swivel joint 3 are provided. Are connected by each hose 8c. The control valve device 7 supplies and discharges hydraulic oil to and from the traveling motor 9 through the hoses 8a and 8b, the swivel joint 3, and the hose 8c.
[0005]
The swivel joint 3 has the following positional relationship. A plurality of wall portions (brackets) 11 are erected on the upper revolving unit 2 to be closer to one side in order to attach a working device (not shown) to a position closer to one side of the front surface of the upper revolving unit 2. The joint 3 is arranged close to the joint 3. The hose connection portions 6a and 6b on one side and the other side of the outer cylinder 4 of the swivel joint 3 arranged close to the wall portion 11 are directed in a direction along the surface of the wall portion 11, and the one side hose connection portion 6a Is located toward the control valve device 7 side, and the hose connection portion 6b on the other side is located toward the opposite side to the control valve device 7. In the vicinity of the other side of the swivel joint 3, a turning motor 12 for turning the upper swing body 2 with respect to the lower traveling body 1 is arranged.
[0006]
Therefore, the hose 8a from the control valve device 7 is directly connected to the hose connecting portion 6a on one side of the swivel joint 3, but the hose 8b is connected to the other side of the swivel joint 3 due to the above-described restriction on the positional relationship of the swivel joint 3. It is difficult to directly connect the hose 8b to the swivel joint 3, and there is a restriction that the swivel joint 3 must be bypassed to connect the hose 8b to the swivel joint 3. Therefore, the hose 8b is guided together with the hose 8a from the control valve device 7 to one side of the swivel joint 3 and bypassed above the swivel joint 3, and the hose 8b is connected to the hose connection 6b on the other side of the swivel joint 3. The parts are connected by a piping device 13 which is a separate component.
[0007]
The piping device 13 has a straight pipe 14, elbows 15 are attached to both ends of the pipe 14, a connector (not shown) for connecting the hose 8 b is attached to one end of the elbow 15, and an elbow is attached to the other end. On the 15 side, a joint 17 that is connected to a connector 16 attached to the hose connection portion 6b on the other side of the swivel joint 3 is attached. A connecting pipe 18 is attached to the end of the hose 8 b connected to the piping device 13, and a joint 19 that is connected to a connector on one end of the piping device 13 on the elbow 15 side is attached to the connecting pipe 18.
[0008]
When the hose 8b is connected to the hose connection portion 6b on the other side of the swivel joint 3, first, the other end of the piping device 13 is connected to the connector 16 of the hose connection portion 6b on the other side of the swivel joint 3 by the joint 17. Then, the end of the hose 8 b is connected to one end of the piping device 13 by the joint 19. Alternatively, first, one end of the piping device 13 and the tip of the hose 8b are connected by the joint 19, and then the other end of the piping device 13 is connected to the connector 16 of the hose connection portion 6b on the other side of the swivel joint 3 by the joint 17. Connecting.
[0009]
[Patent Document 1]
JP-A-9-189046 (page 4, FIG. 5 and FIG. 6)
[0010]
[Problems to be solved by the invention]
As described above, there is a restriction that the swivel joint 3 must be detoured in order to connect the hose 8b to the hose connection part 6b on the other side of the swivel joint 3, so that the hose 8b and the hose connection on the other side of the swivel joint 3 are connected. It is necessary to use a piping device 13 which is a separate component from the hose 8b to connect between the portion 6b, and there is a problem that the number of components increases and the connection work becomes complicated.
[0011]
The present invention has been made in view of such a point, and even if there is a restriction that the swivel joint must be bypassed to connect the hose body to the swivel joint, the number of parts required for connection to the swivel joint is reduced. It is an object of the present invention to provide a hose device that can reduce the number of connections and facilitate the work of connecting to a swivel joint, and a working machine including the hose device.
[0012]
[Means for Solving the Problems]
An invention according to claim 1 is a hose device connected to a swivel joint of a working machine, wherein a flexible hose main body arranged to bypass the swivel joint, and one end and the other end of the swivel joint are provided. A hose device, which is attached to the end of the hose body that is directed to the side and one end of which is bypassed to the swivel joint, and the other end of which is connected to the swivel joint. Even if there is a restriction that the swivel joint has to be bypassed, attaching a bending hose to the hose body eliminates the need for a separate piping device to connect the hose device to the swivel joint, reducing the number of parts and connecting Work can be facilitated.
[0013]
According to a second aspect of the present invention, in the hose device according to the first aspect, the bending hose is formed in a substantially U-shape having bent portions on one end side and the other end side, and having a straight portion between the bent portions. The bending hose can be reduced in size and space can be saved.
[0014]
According to a third aspect of the present invention, in the hose device according to the first or second aspect, a joint is provided at the other end of the bending hose so as to be detachably connected to the swivel joint. Can be combined as much as possible.
[0015]
According to a fourth aspect of the present invention, there is provided a lower traveling body, an upper revolving body rotatably provided on the lower traveling body, and a plurality of hose connection portions provided on a center of rotation of the upper revolving body and on a peripheral surface and a lower part. A swivel joint that allows the working fluid to flow between the upper revolving unit and the lower traveling unit through the peripheral surface and the lower hose connection part, and a hose body at one end of the bending hose is connected to one side of the peripheral surface of the swivel joint. A working machine provided with the hose device according to any one of claims 1 to 3, wherein the other end of the bending hose is connected to the hose connecting portion on the other side of the peripheral surface of the swivel joint, and By attaching a metal bending hose to the lower part, there is no need for a separate piping device to connect the hose device to the swivel joint. Continue work can provide an easy work machine.
[0016]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an embodiment according to the present invention will be described with reference to FIGS.
[0017]
FIG. 4 shows a hydraulic excavator 21 as a working machine. The hydraulic excavator 21 includes a machine body 22 and traveling devices 23 provided on both sides of the machine body 22 in the width direction.
[0018]
The machine main body 22 is configured such that an upper revolving body 26 is rotatably mounted via a revolving bearing part 25 on an upper side of a lower traveling body 24 which can be self-propelled by traveling devices 23 on both sides. A blade device 27 is mounted on the front side of the lower traveling structure 24, a driver's seat 28 is mounted above the upper revolving structure 26, and a work device 29 for excavation is mounted on the front surface of the upper revolving structure 26.
[0019]
The traveling device 23 has a track frame 31, an endless crawler belt 32 is provided around the track frame 31, and a sprocket 33 for driving the crawler belt 32 is provided at one end on the rear side of the track frame 31, An idler 34 that freely rotates together with the crawler belt 32 is rotatably disposed at the other end on the front side of the track frame 31, and a plurality of guide rollers 35 that guide the crawler belt 32 are rotatably disposed at an intermediate portion of the track frame 31. Have been.
[0020]
As shown in FIGS. 1 and 2, the lower traveling body 24 has a traveling machine base 37 on which a swivel bearing 25 is mounted on an upper surface, and traveling devices 23 are provided on both sides of the traveling machine table 37 in the width direction. It is arranged. Each traveling device 23 is provided with a traveling motor 38 as a fluid pressure operating device for rotating the sprocket 33.
[0021]
The upper revolving unit 26 has a revolving unit base 40 supported by the lower traveling unit 24 via a revolving bearing unit 25. On the revolving unit table 40, both sides of the revolving center A of the upper revolving unit 26 are provided. A pair of wall portions 41 and 42 are provided upright. The pair of wall portions 41 and 42 are erected near one side because the working device 29 is attached to a position near one side of the front surface of the upper revolving structure 26, and one wall portion 41 approaches the turning center A. Are located.
[0022]
On the revolving machine base 40 of the upper revolving unit 26, the revolving unit revolves the upper revolving unit 26 relative to the lower traveling unit 24 at a position corresponding to the peripheral surface of the revolving bearing unit 25 between the pair of walls 41 and 42. A motor 43 is provided. By rotating a pinion (not shown) by the turning motor 43 on the upper revolving body 26 side and driving the pinion meshing with a large-diameter inner gear provided on the revolving bearing portion 25 on the lower traveling body 24 side, the lower traveling body The upper swing body 26 is swung with respect to 24.
[0023]
A swivel joint 44 for circulating hydraulic oil as a working fluid between the lower traveling structure 24 and the revolving upper revolving structure 26 is disposed at the revolving center A of the upper revolving structure 26. The swivel joint 44 is attached to the lower traveling body 24 with an outer cylinder 45 attached to the upper revolving body 26 and rotatable inside the outer cylinder 45 and partially protruding from a lower portion of the outer cylinder 45. The inner cylinder 46 is provided. A plurality of hose connection portions 47a and 47b are provided on one side and the other side of the peripheral surface of the outer cylinder 45, and a plurality of hose connection portions 47c are provided on the peripheral surface of the inner cylinder 46.
[0024]
The plurality of hose connection portions 47a and 47b are annularly arranged at a plurality of positions in the axial direction in the outer cylinder 45, and communicate with the plurality of circumferential grooves sealed with each other. Each of the circumferential grooves and each of the oil passages communicate with each other in a one-to-one manner.
[0025]
Outside the wall 42 on the revolving machine base 40 of the upper revolving unit 26, hydraulic oil is supplied from a hydraulic pump driven by an engine (not shown), and hydraulic cylinders of the working device 29 and the traveling motor 38 and the rotating motor 43 are provided. A control valve device 48 for controlling the hydraulic oil supplied to and discharged from each fluid pressure operating device is provided. The engine, the hydraulic pump, the oil tank, and the like mounted on the upper swing body 26 constitute a hydraulic pressure source as a working fluid pressure source.
[0026]
The swivel joint 44 is disposed close to the wall portion 41 that is closer to the center of rotation A, and the hose connection portions 47a and 47b on one side and the other side of the outer cylinder 4 of the swivel joint 44 are connected to the wall portion 41. The hose connection portion 47a on one side is located toward the control valve device 48, and the hose connection portion 47b on the other side is located toward the opposite side to the control valve device 48. I have.
[0027]
In the upper revolving unit 26, the hose connection portions 47 a and 47 b of the outer cylinder 45 of the swivel joint 44 and the control valve device 48 are connected by the hose devices 49 a and 49 b disposed in the revolving machine base 40. I have. In the lower traveling body 24, the space between each hose connection portion 47 c of the inner cylinder 46 of the swivel joint 44 and each traveling motor 38 of the traveling device 23 on both sides of the lower traveling body 24 is within the traveling machine base 37 and the track frame 31. Each hose device 49c is connected to each other. Two hose devices 49c connected to each travel motor 38 are used for each travel motor 38 to supply and discharge hydraulic oil, and each hose device 49c connected to each hose device 49c via a swivel joint 44. 49a and 49b are also used two each for supply and discharge. The hose devices 49a and 49b are guided from the control valve device 48 to the swivel joint 44 through an opening 42a formed in the wall 42, and an intermediate portion is bound by a binding member 50.
[0028]
As shown in FIG. 3, the hose device 49b has a hose body 51 formed in a cylindrical shape with, for example, flexible rubber and a pressure-resistant structure. A bending hose 52 connected to 44 is attached.
[0029]
The bending hose 52 has a cylindrical tube 53 made of metal, and one end and the other end of the tube 53 are bent so as to face sideways with respect to the intermediate portion. Bends 54 and 55 are formed at substantially right angles to the other end, respectively, and a straight portion 56 is formed between these bends 54 and 55, and is bent in a substantially U-shape as a whole.
[0030]
One end of the bending hose 52 is fixedly attached to the tip of the hose body 51. At one end of the bending hose 52, a cylindrical insertion portion 57 to be inserted into the hose body 51 is protruded, and a plurality of insertion portions 57 are provided on the outer periphery of the insertion portion 57 so as to bite into the inner periphery of the hose body 51 to prevent the insertion. Annular convex portions 58 are formed in parallel in the axial direction. On the base end side of the insertion portion 57, an annular stopper portion 59 with which the end surface of the hose body 51 abuts is formed to protrude, and an annular flange is provided between the stopper portion 59 and an annular caulking groove 60. The part 61 is formed so as to protrude. A substantially cylindrical swaging member 62 is disposed around the insertion portion 57, and the end of the swaging member 62 is swaged in the swaging groove 60 from the outer diameter direction, and the bending hose 52 and the swaging member 62 are fixed. The periphery of the caulking fitting 62 is caulked to the hose body 51 from the outer diameter direction, and the hose body 51 and the insertion portion 57 are crimped and fixed. The insertion portion 57, the caulking groove 60, the caulking fitting 62, and the like constitute a fixing means 63 for fixing one end of the bending hose 52 to the tip of the hose body 51. Then, as shown in FIG. 2, the direction of one end of the bending hose 52 corresponds to the direction in which the hose body 51 is connected, and is different from the direction of the other end of the bending hose 52.
[0031]
The other end of the bending hose 52 is detachably connected to an adapter 65 previously attached to the hose connection portion 47b of the swivel joint 44. The adapter 65 has an external threaded portion 66 to which the bending hose 52 is attached at one end, and an external threaded portion 67 to be screwed and connected to the hose connection portion 47b at the other end. A hexagon-shaped portion 68 is formed between the 67 and 67 so that a tool such as a hexagon wrench can be engaged and operated. A hole 69 through which hydraulic oil flows is formed through the center from the center of the external screw portion 66 at one end to the center of the external screw portion 67 at the other end. An annular groove 70 is formed on the end surface of the external thread 66 at one end to which the bending hose 52 is attached, and an annular packing 71 is disposed in the groove 70.
[0032]
At the other end of the bending hose 52, a joint 73 detachably connected to an adapter 65 previously attached to the hose connection portion 47b of the swivel joint 44 is attached. The joint 73 is rotatably attached to a large-diameter portion 74 formed at the tip of the bending hose 52 and is rotatably mounted at one end of the joint 73 around the pipe 53 of the bending hose 52 with a smaller diameter than the large-diameter portion 74. An engagement portion 76 having an engagement hole 75 that rotatably engages with the outside is formed on the other end side. An inner screw 77 having a diameter larger than the large diameter portion 74 and screwing to the outer thread portion 66 of the adapter 65 is formed. Have been. A hexagonal portion 78 is formed around the outer periphery of the joint 73 so as to be operable by engaging a tool such as a hexagon wrench. Then, by screwing the inner screw 77 of the joint 73 to the outer screw portion 66 of the adapter 65, the end surface of the large diameter portion 74 is pressure-bonded to the end surface of the outer screw portion 66 via the packing 71 and liquid-tightly connected. You.
[0033]
Also, as shown in FIG. 1, an intermediate portion of the bending hose 52 of the two hose devices 49 b is supported on the wall 41 by a bracket 79.
[0034]
Also, as shown in FIGS. 1 and 2, the hose devices 49a and 49c also have a hose body 81 having the same flexibility as the hose body 51 of the hose device 49b, and the proximal end of the hose device 49b. At both ends of the hose devices 49a and 49c, connection means 82 for detachably connecting to corresponding portions such as the control valve device 48, the hose connection portions 47a and 47c of the swivel joint 44, and the traveling motor 38 are attached. I have. The connection means 82 includes a substantially L-shaped connection metal fitting, a joint, and the like.
[0035]
Next, the operation and effect of the present embodiment will be described.
[0036]
On the upper revolving body 26 side, each of the hose devices 49a and 49b is guided from the control valve device 48 to the swivel joint 44 through an opening 42a formed in the wall portion 42, and an intermediate portion thereof is bundled by the bundle member 50. .
[0037]
The distal end of each hose device 49a is guided to one side of the peripheral surface of the swivel joint 44 and connected to each hose connection part 47a on one side of the peripheral surface.
[0038]
With respect to each hose device 49b, the hose body 51 is led from the direction of one circumferential surface of the swivel joint 44 to bypass above the upper end of the swivel joint 44, and the tip of the bending hose 52 is connected to the swivel joint 44 by the joint 73. It is screwed and connected to the adapter 65 connected to the hose connection part 47b on the other side of the peripheral surface. The straight portion 56 at the intermediate portion of the bending hose 52 of each hose device 49b is arranged vertically on the other side of the peripheral surface of the swivel joint 44, and is supported by the wall 41 by the bracket 79.
[0039]
The hose device 49b is guided from one side of the peripheral surface of the swivel joint 44 together with the hose device 49a, the swivel joint 44 is arranged close to the wall 41 of the upper swing body 26, The hose device 49b is connected to the hose connection portion 47b on the other side of the peripheral surface of the swivel joint 44 by disposing a turning motor 43 for turning the upper turning body 26 with respect to the lower traveling body 24 in the vicinity of the other side. However, there is a restriction that the swivel joint 44 must be bypassed.
[0040]
The hose device 49b includes a metal bending hose 52 having one end and the other end bent toward the swivel joint 44 side, and one end of the bending hose 52 is fixed to the tip of a hose body 51 that bypasses the swivel joint 44. In order to connect the other end to the hose connection 47b on the other side of the swivel joint 44, the swivel joint 44 is bypassed to connect the hose device 49b to the hose connection 47b on the other side of the swivel joint 44. Even if there is a restriction to be made, a separate piping device is not required for connecting the hose device 49b to the swivel joint 44, the number of parts can be reduced, and the connection work can be facilitated.
[0041]
Further, the bending hose 52 of the hose device 49b has bending portions 54 and 55 on one end side and the other end side, respectively, and is formed in a substantially U-shape having a straight portion 56 between the bending portions 54 and 55, thereby bending the hose. The hose 52 can be reduced in size and space can be saved.
[0042]
Further, the joint 73 provided at the other end of the bending hose 52 of the hose device 49b can be detachably connected to the swivel joint 44, and maintenance can be facilitated.
[0043]
The shape of the bending hose 52 of the hose device 49b is not limited to the substantially U-shape as in the above-described embodiment, as long as one end and the other end are formed so as to be directed sideways with respect to the intermediate portion. , May be curved into a substantially C-shape or the like.
[0044]
The direction of one end of the bending device 52 of the hose device 49b fixed to the hose body 51 corresponds to the direction in which the hose body 51 is connected, and may be different from the direction of the other end of the bending hose 52 or It may be in the same direction.
[0045]
【The invention's effect】
According to the first aspect of the present invention, the hose device includes a bending hose having one end and the other end directed toward the swivel joint, and one end of the bending hose is attached to a tip of a hose body bypassing the swivel joint. To connect the hose body to the swivel joint, even if there is a restriction that the swivel joint must be bypassed to connect the hose body to the swivel joint, there is no need for a separate piping device to connect the hose device to the swivel joint, The number of parts can be reduced and connection work can be facilitated.
[0046]
According to the second aspect of the invention, the bending hose of the hose device is formed in a substantially U-shape having bent portions on one end side and the other end side and having a straight portion between these bent portions. And space saving.
[0047]
According to the third aspect of the present invention, the joint provided at the other end of the bending hose of the hose device can be detachably connected to the swivel joint.
[0048]
According to the invention as set forth in claim 4, the hose body of the hose device is led around from the direction of one side of the peripheral surface of the swivel joint, and the bending hose is connected to the hose connection part on the other side of the peripheral surface of the swivel joint. It is possible to provide a working machine that does not require a separate piping device to connect the hose device to the swivel joint, and that can be easily connected.
[Brief description of the drawings]
FIG. 1 is a side view of an internal structure showing an embodiment of a hose device and a working machine according to the present invention.
FIG. 2 is a plan view of an internal structure of the work machine.
FIG. 3 is a sectional view of the hose device.
FIG. 4 is a side view of the working machine.
FIG. 5 is a side view of the internal structure of a conventional working machine.
FIG. 6 is a plan view of the internal structure of a conventional working machine.
[Explanation of symbols]
21 Hydraulic excavator 24 as work machine Lower traveling body 26 Upper revolving structure 44 Swivel joint 47b Hose connection part 49b Hose device 51 Hose body 52 Bending hoses 54 and 55 Bending part 56 Straight part 73 Joint

Claims (4)

A hose device connected to a swivel joint of a work machine,
A flexible hose body arranged around the swivel joint,
A hose device comprising: a bending hose having one end and the other end facing the swivel joint, one end attached to a tip of a hose body bypassing the swivel joint, and the other end connected to the swivel joint. 2. The hose device according to claim 1, wherein the bending hose has bent portions on one end and the other end, and is formed in a substantially U-shape having a straight portion between the bent portions. The hose device according to claim 1 or 2, further comprising a joint provided at the other end of the bending hose so as to be detachably connected to the swivel joint. An undercarriage,
An upper revolving structure provided rotatably on the lower traveling structure,
A plurality of hose connection portions are provided on the peripheral surface and the lower portion, respectively, at the center of rotation of the upper revolving structure, and the working fluid flows between the upper revolving structure and the lower traveling structure through the peripheral surface and the lower hose connection portion. Swivel joint
The hose body at one end of the bending hose is guided from one side of the circumferential surface of the swivel joint, and the other end of the bending hose is connected to a hose connection portion at the other side of the circumferential surface of the swivel joint. A working machine comprising the hose device according to claim 1.

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