JP3927477B2 - Hose device and work machine - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a hose device connected to a swivel joint of a work machine, and a work machine including the hose device.
[0002]
[Prior art]
Generally, a hydraulic excavator as a work machine includes a lower traveling body capable of self-propelling, and an upper revolving body is provided on the upper portion of the lower traveling body so as to be able to swivel. A swivel joint is arranged at the turning center of the upper revolving structure, and the swivel joint allows hydraulic oil to flow between the lower traveling structure and the upper revolving structure that revolves (see, for example, Patent Document 1).
[0003]
For example, as shown in FIGS. 5 and 6, the upper swing body 2 is turnably provided at the upper portion of the lower traveling body 1, and the swivel joint 3 is disposed at the center of the upper swing body 2. The swivel joint 3 is attached to the lower traveling body 1 side, with an outer cylinder 4 attached to the upper revolving body 2 side and the inside of the outer cylinder 4 being rotatable and partially protruding from the lower portion of the outer cylinder 4. The inner cylinder 5 is provided. A plurality of hose connection portions 6 a and 6 b 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 6 c are provided on the peripheral surface of the inner cylinder 5.
[0004]
The upper swing body 2 is provided with a control valve device 7 to which hydraulic oil is supplied from a hydraulic pump (not shown), and between the control valve device 7 and each hose connection portion 6a, 6b 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 a traveling device 10 on both sides having a traveling motor 9 that is operated by hydraulic oil. The traveling motor 9 of the traveling device 10 on both sides and each hose connection portion 6c of the inner cylinder 5 of the swivel joint 3 are provided. Are connected with each hose 8c. Then, hydraulic oil is supplied to and discharged from the traveling motor 9 by the control valve device 7 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 one side of the upper swing body 2 so as to attach a working device (not shown) to a position near one side of the front surface of the upper swing body 2. The joint 3 is disposed close to the joint 3. The hose connection parts 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 part 11 are directed in the direction along the surface of the wall part 11, and the one side hose connection part 6a. Is located toward the control valve device 7 side, and the hose connection 6b on the other side is located toward the opposite side of 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 turning body 2 relative to the lower traveling body 1 is disposed.
[0006]
Therefore, the hose 8a from the control valve device 7 is directly connected to the hose connection 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 positional relationship of the swivel joint 3 described above. It is difficult to connect directly to the hose connecting portion 6b, and there is a restriction that the swivel joint 3 must be bypassed in order 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 is detoured above the swivel joint 3. The hose 8b is connected to the hose connection 6b on the other side of the swivel joint 3. They are connected by a piping device 13 which is a separate part.
[0007]
The piping device 13 includes 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 the elbow 15 at one end, and an elbow at the other end is attached. On the 15 side, a joint 17 is attached to be coupled to the connector 16 attached to the hose connection portion 6b on the other side of the swivel joint 3. In addition, a connecting pipe 18 is attached to the tip of the hose 8b connected to the piping device 13, and a joint 19 is attached to the connecting pipe 18 to be coupled to a connector on the elbow 15 side at one end of the piping device 13.
[0008]
When the hose 8b is connected to the other hose connection 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 on the other hose connection 6b on the other side of the swivel joint 3 by the joint 17. Next, the tip of the hose 8b is connected to one end of the piping device 13 by a 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 connecting portion 6b on the other side of the swivel joint 3 by the joint 17. Connecting.
[0009]
[Patent Document 1]
Japanese Patent Laid-Open No. 9-189046 (Page 4, FIGS. 5 and 6)
[0010]
[Problems to be solved by the invention]
As described above, there is a restriction that the swivel joint 3 must be bypassed in order to connect the hose 8b to the hose connection portion 6b on the other side of the swivel joint 3. It is necessary to use the piping device 13, which is a separate component from the hose 8b, to connect the portion 6b, which increases the number of components and complicates the connection work.
[0011]
The present invention has been made in view of such points, 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 It is an object of the present invention to provide a hose device that can reduce the number of the swivel joints and facilitate the connection work to the swivel joint, and a work machine including the hose device.
[0012]
[Means for Solving the Problems]
The invention described in claim 1 is a hose device that is connected to a plurality of hose connection portions on the upper and lower sides provided on the peripheral surface of the swivel joint of the work machine, and is arranged around the upper part of the swivel joint. Multiple hose bodies with flexibility, one end and the other end facing the swivel joint side, one end is attached to the tip of each hose body that bypasses the top of the swivel joint, and the other end is connected to each hose of the swivel joint A plurality of bending hoses connected to the section , wherein the plurality of bending hoses have a vertical distance between one end and the other end of the bending hose that is lower than the bending hose connected to the upper hose connection section. The bending hose connected to the hose connection is wider and the middle of the bending hose is in contact with the upper hose connection. A hose device towards the bending hose connected to the hose connection portion of the lower side of the bending hoses are located outside with respect to the swivel joint, the middle portion of the plurality of bending the hose is supported on the work machine side by a bracket Yes, even if there is a restriction that the swivel joint must be detoured to connect the hose body to the swivel joint, a different piping device is used to connect the hose device to the swivel joint by attaching a bending hose to the hose body. This reduces the number of parts and facilitates connection work.
[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. As a result, 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 that is detachably coupled to the swivel joint is provided at the other end of the bending hose. Can be combined as possible.
[0015]
According to a fourth aspect of the present invention, there is provided a lower traveling body, an upper revolving body that is pivotably provided on the lower traveling body, and a plurality of upper and lower portions that are provided at a turning center of the upper revolving body and that are provided on a circumferential surface . a hose connection, and lower the plurality of hose connections, respectively, and swivel joint for circulating the working fluid between the hose connection and the upper rotating body through the lower hose connections and the undercarriage of the peripheral surface The hose body at one end of the bending hose is led around the swivel joint from the direction of one side of the swivel joint, and the other end of the bending hose is connected to the hose connection on the other side of the swivel joint. A working machine comprising the hose device according to any one of claims 1 to 3, wherein a metal bending hose is attached to the hose body, Without the need for a separate delivery apparatus to the connection of the hose device in the joint, connection work between the lower traveling body and an upper revolving structure can provide easy work machine.
[0016]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments according to the present invention will be described below with reference to FIGS.
[0017]
FIG. 4 shows a hydraulic excavator 21 as a work machine. The hydraulic excavator 21 includes a machine body 22 and a traveling device 23 provided on both sides of the machine body 22 in the width direction.
[0018]
The machine body 22 is configured such that an upper swing body 26 is turnably attached to an upper side of a lower travel body 24 that can be self-run by the travel devices 23 on both sides via a swing bearing portion 25. A blade device 27 is attached to the front side of the lower traveling body 24, a driver's seat 28 is mounted on the upper part of the upper swing body 26, and an excavating work device 29 is attached to the front surface of the upper swing body 26.
[0019]
The traveling device 23 has a track frame 31, an endless crawler belt 32 is disposed around the track frame 31, and a sprocket 33 that drives the crawler belt 32 is disposed 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. Has been.
[0020]
As shown in FIGS. 1 and 2, the lower traveling body 24 has a traveling machine base 37 having a swivel bearing portion 25 mounted on the upper surface, and traveling devices 23 are provided on both sides of the traveling machine base 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 that rotates the sprocket 33.
[0021]
Further, the upper swing body 26 has a swing machine base 40 supported by the lower traveling body 24 via the swing bearing portion 25, and on the swing machine base 40 on both sides of the turning center A of the upper swing body 26. A pair of wall portions 41 and 42 are erected. The pair of wall portions 41 and 42 are erected on the one side from the relationship of attaching the working device 29 to a position near one side of the front surface of the upper swing body 26, and one wall portion 41 approaches the turning center A. Is arranged.
[0022]
On the swivel base 40 of the upper swing body 26, the upper swing body 26 is swung with respect to the lower traveling body 24 at a position corresponding to the peripheral surface of the swing bearing portion 25 between the pair of wall portions 41, 42. A motor 43 is arranged. By rotating the pinion (not shown) by the swing motor 43 on the upper swing body 26 side and driving the pinion that meshes with the large-diameter inner gear provided on the swing bearing portion 25 on the lower travel body 24 side, the lower travel body The upper swing body 26 is swung with respect to 24.
[0023]
A swivel joint 44 is provided at the turning center A of the upper swing body 26 to allow the working oil as a working fluid to flow between the lower traveling body 24 and the upper swing body 26 that rotates. The swivel joint 44 is mounted on the lower traveling body 24 side, with an outer cylinder 45 attached to the upper swing body 26 side, and being rotatable within the outer cylinder 45 and partially protruding from the 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 axial positions in the outer cylinder 45 and communicated with a plurality of circumferential grooves sealed to each other. The plurality of hose connection portions 47c A plurality of oil passages provided in 46 communicate with each other, and each circumferential groove communicates with each oil passage in a one-to-one relationship.
[0025]
On the swivel base 40 of the upper swing body 26, outside the wall portion 42 is supplied with hydraulic oil from a hydraulic pump driven by an engine (not shown), and each hydraulic cylinder of the working device 29, the travel motor 38, and the swing motor 43. A control valve device 48 for controlling the hydraulic oil to be supplied to and discharged from each fluid pressure actuator is installed. Note that a hydraulic source as a working fluid pressure source is configured by an engine, a hydraulic pump, an oil tank, and the like mounted on the upper swing body 26.
[0026]
The swivel joint 44 is disposed close to the wall portion 41 that is close to the turning center 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 the wall portion 41. The hose connection 47a on one side is located toward the control valve device 48, and the hose connection 47b on the other side is located opposite to the control valve device 48. Yes.
[0027]
In the upper swing body 26, the hose connection portions 47a, 47b of the outer cylinder 45 of the swivel joint 44 and the control valve device 48 are connected by the respective hose devices 49a, 49b arranged in the swivel base 40. Yes. In the lower traveling body 24, between the respective hose connecting portions 47c of the inner cylinder 46 of the swivel joint 44 and the traveling motors 38 of the traveling devices 23 on both sides of the lower traveling body 24 are in the traveling machine base 37 and the track frame 31. Each hose device 49c to be arranged is connected. Two hose devices 49c connected to each traveling motor 38 are used for each traveling motor 38 in order to supply and discharge hydraulic oil, and each hose device communicated with each of the hose devices 49c via a swivel joint 44. 49a and 49b are also used for feeding and discharging, respectively. The hose devices 49a and 49b are led from the control valve device 48 to the swivel joint 44 through the opening 42a formed in the wall portion 42, and the intermediate portions are bundled by the bundle 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, and a swivel joint is attached to the tip of the hose body 51. A bending hose 52 connected to 44 is attached.
[0029]
The bending hose 52 has a cylindrical tube body 53 made of metal, and is bent and formed so that one end and the other end of the tube body 53 are respectively directed laterally with respect to the intermediate portion. Further, bent portions 54 and 55 are formed at substantially right angles on the other end side, respectively, and a straight portion 56 is formed between the bent portions 54 and 55, and is bent into a substantially U shape as a whole.
[0030]
One end of the bending hose 52 is attached to the tip of the hose body 51 by fixing. One end of the bending hose 52 is provided with a cylindrical insertion portion 57 to be inserted into the hose body 51. The outer periphery of the insertion portion 57 is inserted into the inner periphery of the hose body 51 to prevent the hose body 51 from coming off. An annular convex portion 58 is formed in parallel in the axial direction. An annular stopper portion 59 with which the end surface of the hose body 51 abuts is formed on the proximal end side of the insertion portion 57, and an annular flange is interposed between the stopper portion 59 and an annular caulking groove 60. The part 61 is formed to protrude. A caulking fitting 62 having a substantially cylindrical shape is disposed around the insertion portion 57, and the bending hose 52 and the caulking fitting 62 are fixed by caulking the end of the caulking fitting 62 to the caulking groove 60 from the outer diameter direction. The hose body 51 and the insertion portion 57 are crimped and fixed by caulking the periphery of the caulking metal fitting 62 to the hose body 51 from the outer diameter direction. 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. 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 coupled to an adapter 65 that is attached in advance to the hose connection portion 47b of the swivel joint 44. The adapter 65 has an external thread portion 66 to which the bending hose 52 is attached at one end, and an external thread portion 67 that is screwed to the hose connection portion 47b at the other end. The external thread portion 66, A hexagonal portion 68 that can be operated by engaging a tool such as a hexagon wrench between 67 is formed. A hole 69 through which the hydraulic oil flows is formed through the center of the outer screw portion 66 at one end and the center of the outer screw portion 67 at the other end. An annular groove portion 70 is formed on the end surface of the external thread portion 66 at one end to which the bending hose 52 is attached, and an annular packing 71 is disposed in the groove portion 70.
[0032]
At the other end of the bending hose 52, a joint 73 is attached that is detachably coupled to an adapter 65 that is attached in advance to the hose connection portion 47b of the swivel joint 44. This joint 73 engages with a large-diameter portion 74 formed at the tip of the bending hose 52 and is rotatably attached. One end of the joint 73 is smaller in diameter than the large-diameter portion 74 and around the pipe 53 of the bending hose 52. An engaging portion 76 having an engaging hole 75 that is rotatably engaged with the inner thread 77 is formed on the other end, and an inner screw 77 having a diameter larger than that of the large diameter portion 74 and screwed into the outer thread portion 66 of the adapter 65 is formed. Has been. A hexagonal portion 78 that can be operated by engaging a tool such as a hexagon wrench is formed on the outer periphery of the joint 73. Then, by screwing the inner thread 77 of the joint 73 into the outer threaded portion 66 of the adapter 65, the end surface of the large diameter portion 74 is crimped to the end surface of the outer threaded portion 66 via the packing 71 and is liquid-tightly coupled. The
[0033]
Further, 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 portion 41 by a bracket 79.
[0034]
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 base end of the hose device 49b. Further, connecting means 82 are attached to both ends of the hose devices 49a and 49c so as to be detachably coupled to corresponding positions such as the control valve device 48, the hose connecting portions 47a and 47c of the swivel joint 44, and the traveling motor 38. Yes. The connection means 82 includes a connection fitting such as a substantially L shape, a joint, and the like.
[0035]
Next, the function and effect of this embodiment will be described.
[0036]
On the upper swing body 26 side, each hose device 49a, 49b is led from the control valve device 48 to the swivel joint 44 through the opening 42a formed in the wall portion 42, and the intermediate portion thereof is bundled by the bundle member 50. .
[0037]
The tip of each hose device 49a is guided to one side of the circumferential surface of the swivel joint 44 and connected to each hose connection part 47a on the one side of the circumferential surface.
[0038]
For each hose device 49b, the hose body 51 is led around the upper end of the swivel joint 44 from one side of the swivel joint 44 and the tip of the bending hose 52 is connected to the swivel joint 44 by a joint 73. The adapter 65 connected to the hose connection portion 47b on the other side of the peripheral surface is screwed and coupled. The straight portion 56 at the intermediate portion of the bending hose 52 of each hose device 49b is arranged in the vertical direction on the other side of the peripheral surface of the swivel joint 44, and is supported by the wall portion 41 by a bracket 79.
[0039]
The hose device 49b is guided from the circumferential surface side of the swivel joint 44 together with the hose device 49a, the swivel joint 44 is disposed close to the wall portion 41 of the upper swing body 26, the swivel joint 44 In the vicinity of the other side, a turning motor 43 for turning the upper turning body 26 with respect to the lower traveling body 24 is arranged, for example, to connect the hose device 49b to the hose connection portion 47b on the other side of the circumferential surface of the swivel joint 44. However, there is a restriction that the swivel joint 44 must be bypassed.
[0040]
The hose device 49b includes a metal bending hose 52 bent so that one end and the other end face the swivel joint 44 side, and one end of the bending hose 52 is fixed to the tip of the hose body 51 that bypasses the swivel joint 44. Since the other end is connected to the hose connection portion 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 portion 47b on the other side of the swivel joint 44. Even if there is a restriction that must be made, a separate piping device is not required for connecting the hose device 49b to the swivel joint 44, and 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 a bent portion 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 bent portions 54 and 55, thereby bending the hose device 49b. The hose 52 can be made small, and space can be saved.
[0042]
Further, the coupling 73 provided at the other end of the bending hose 52 of the hose device 49b can be detachably coupled 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 bent so as to be directed laterally with respect to the intermediate portion. Alternatively, it may be a shape that is bent into a substantially C shape.
[0044]
Further, the direction of one end fixed to the hose body 51 of the bending hose 52 of the hose device 49b corresponds to the direction in which the hose body 51 is connected. The same direction may be used.
[0045]
【The invention's effect】
According to the invention of claim 1, the hose device includes a bending hose with one end and the other end facing the swivel joint side, and one end of the bending hose is attached to the tip of the hose body that is bypassed above 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 because the other end is connected to the swivel joint, a separate piping device is required to connect the hose device to the swivel joint. Therefore, the number of parts can be reduced and connection work can be facilitated.
[0046]
According to the invention described in claim 2, since the bending hose of the hose device is formed in a substantially U-shape having a bent portion on one end side and the other end side and having a straight portion between these bent portions, the bending hose is small-sized. Can save space.
[0047]
According to invention of Claim 3, it can couple | bond with a swivel joint so that attachment or detachment is possible by the coupling provided in the other end of the bending hose of the hose apparatus.
[0048]
According to the fourth aspect of the present invention, the hose body of the hose device guidance from the direction of the circumferential surface one side of the swivel joint to bypass above the swivel joint, the bending hose circumferential surface the other side of the swivel joint hose connection Therefore, it is possible to provide a working machine that does not require a separate piping device for connecting the hose device to the swivel joint and 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 work machine according to the present invention.
FIG. 2 is a plan view of the internal structure of the work machine.
FIG. 3 is a sectional view of the same 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 work machine.
FIG. 6 is a plan view of the internal structure of a conventional work machine.
[Explanation of symbols]
21 Hydraulic excavators as work machines
24 Undercarriage
26 Upper swing body
44 Swivel joint
47b Hose connection
49b hose device
51 Hose body
52 Bending hose
54, 55 Bending part
56 Straight section
73 Fitting
79 bracket

Claims (4)

A hose device connected to a plurality of hose connection portions on the top and bottom provided on the peripheral surface of the swivel joint of the work machine,
A plurality of hose body having flexibility is arranged to bypass the upper swivel joint,
A plurality of bending hoses with one end and the other end facing the swivel joint side, one end attached to the tip of each hose body that is bypassed above the swivel joint, and the other end connected to each hose connection of the swivel joint Equipped ,
The bending hose connected to the lower hose connection part is wider than the bending hose connected to the upper hose connection part in the vertical interval between one end and the other end of the bending hose. And, the bending hose connected to the hose connection part below the bending hose connected to the upper hose connection part of the middle part of the bending hose is arranged outside the swivel joint,
A hose device in which intermediate portions of a plurality of bending hoses are supported on a work machine side by a bracket . 2. The hose device according to claim 1, wherein 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 hose device according to claim 1 or 2, wherein a joint that is detachably coupled to the swivel joint is provided at the other end of the bending hose. A lower traveling body,
An upper revolving unit provided to be capable of swiveling in the lower traveling unit;
Provided the turning center of the upper rotating body, a plurality of hose connections to the upper and lower disposed on the peripheral surface, and a plurality of hose connections to the lower part, the hose connecting portions of the circumferential surface and the bottom of the hose connection A swivel joint that circulates the working fluid between the upper swing body and the lower traveling body through,
The hose body at one end of the bending hose was led around the swivel joint from the direction of one side of the swivel joint, and the other end of the bending hose was connected to the hose connection on the other side of the swivel joint. A working machine comprising: the hose device according to claim 1.

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