JP4005797B2 - Swivel joint and crusher with watering device using the same - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
  The present invention relates to a crusher used for demolition work and crushed stone work of a concrete structure, and more particularly to a crusher with a sprinkler.
[0002]
[Prior art]
  In the demolition work of a concrete structure, since there is a possibility that the surrounding environment may be contaminated by the scattering of dust, the demolition work is conventionally performed while watering.
[0003]
  This watering device is usually installed in a crusher mounted at the tip of the work attachment. For example, a “watering device for a crusher” described in JP-A-11-336336 is known.
[0004]
  In this type of crusher, as shown in the front view of FIG. 8A, one crushing arm 63 is provided on the main frame 60 via an arm pin 61, and the other crushing arm 64 is also provided via an arm pin 62. The hydraulic cylinder 65 is installed on the upper parts 63a and 64a of the crushing arms 63 and 64.
[0005]
  When the rod 65a of the hydraulic cylinder 65 is extended, the crushing arms 63 and 64 close in the direction of the arrows around the arm pins 61 and 62, respectively, and the object can be grasped or crushed.
[0006]
  Moreover, the upper part of the main frame 60 is provided with the attachment bracket 68 via the turning part 67, This attachment bracket 68 is connected to the boom of a construction machine, for example.
[0007]
  The swivel part 67 is provided with a swivel joint 69, and the hydraulic pipe and the hydraulic pipe are extended to the crushing arm via the swivel joint 69.
[0008]
  As shown in the enlarged side view of FIG. 8B, the watering device 70 to which the hydraulic pipe is connected fixes the water supply hose 70 a penetrating the swivel joint 69 and the water supply hose 70 a to the main frame 60. The relay block 70b for this purpose and the watering nozzle 70c provided at the tip of the water supply hose 70a. When the crushing arms 63 and 64 are rotated and the water supply hose 70b is twisted, it is absorbed by the rotary joint 70b ′ (see FIG. 8A) provided in the relay block 70b. .
[0009]
[Problems to be solved by the invention]
  However, in the above-described conventional crusher with a watering device, the relay block 70b is disposed below the swivel unit 67, and the watering nozzle 70c is disposed further below the relay block 70b. However, there is a problem that the size cannot be reduced.
[0010]
  Even if the structure of the swivel joint 69 is used, the hydraulic pipe for driving the crushing arm and the hydraulic pipe for sprinkling are gathered and passed. Therefore, if a predetermined flow rate is to be secured in the hydraulic pipe, the swivel joint is arranged in the radial direction. This is a factor that hinders downsizing of the main frame 60.
[0011]
  Since the relay block 70b is arranged at a position eccentric from the swivel center of the swivel joint 69 so as not to interfere with the hydraulic cylinder 65, when the main frame 60 is rotated, a load is applied to the inner peripheral side of the sliding portion of the rotary joint 25. Works in a biased manner. In addition, there is a problem that the life of the rotary joint is shortened because dust, sludge, and the like may directly contact the rotary joint 25 or may collide with fragments.
[0012]
  Furthermore, in the above configuration, since the watering nozzle 70 is disposed avoiding interference with the crushing arms 63 and 64, there is a problem in that the watering efficiency decreases when the object is held and the object interferes. is there.
[0013]
  The present invention has been made in consideration of the problems in the conventional crusher with a watering device as described above, and a first object is to provide a swivel joint that can be made compact. An object is to provide a crusher with a sprinkler capable of reducing the size of the crusher and further improving the water sprinkling efficiency of the sprinkler and increasing the durability.
[0014]
[Means for Solving the Problems]
  The swivel joint of the present invention is a swivel joint that connects a hydraulic pipe provided on the movable side and a hydraulic pipe provided on the fixed side.An outer case, a rotating body partially accommodated in the outer case in a state of being rotatable about a predetermined rotation axis, and at least one hydraulic supply / discharge path provided in the outer case and the rotating body. This hydraulic supply / discharge path isA fixed-side hydraulic port provided in the outer case;Part of the rotating body housed in the outer caseAn annular groove formed on the outer peripheral surface of the annular groove and capable of communicating with the fixed-side hydraulic port;ThisIn communication with the annular groove of the aboveRotating shaftAxiallyAlong the rotating bodyA plurality of branch passages to be drilled; andRotating bodyProvided aboveeachBranch passageA set that collectshydraulicaisleWhenAnd a movable hydraulic port provided in the rotating body in communication with the collective hydraulic passage.This is the gist.
[0015]
  According to the swivel joint of the present invention, since a plurality of branch passages are provided in the swivel joint, the pressure oil introduced from the fixed hydraulic port flows into the branch passages and flows through the swivel joint.Collective hydraulic passageJoin inFrom movable hydraulic portDerived. As a result, the swivel joint can be made compact while ensuring the maximum flow path in the swivel joint.
[0016]
  If the swivel joint having this configuration is incorporated into a crusher with a crushing arm rotating, the crusher can be reduced in weight and the crusher can be made compact.
[0017]
  In the swivel joint, it is preferable that the collective hydraulic passage and the movable hydraulic port are provided in a portion of the rotating body that is not housed in the outer case.
[0018]
  In the swivel joint, the aboveeachBranch passageIsthe aboveAdjacent in the rotating bodyPlacedWiththe aboveCollective hydraulic passageIt is preferable that it is couple | bonded with. According to this configuration, the flow path resistance can be reduced while securing the maximum flow path in the swivel joint. A passage that leads from the branch passage to the movable hydraulic port(Collecting hydraulic passage)Can be formed in a manifold connected to the end of the inner joint.
[0019]
  Further, by providing a plurality of branch hydraulic passages, a space can be made in the rotation center shaft portion of the swivel joint, and a through hole for inserting a pipe, a cable or the like can be provided there.
[0020]
  In the swivel joint, a water pressure passage provided in the rotating body, and the rotating body A rotary joint mounted on the rotary shaft, wherein the water pressure passage has an inlet communicating with the rotary joint and an outlet connectable to a water supply pipe provided on the movable side. The joint is preferably configured to be connectable to a water supply pipe provided on the fixed side and to be rotatable with respect to the rotating body. According to this configuration, since the rotary shaft of the rotary joint is disposed on the rotary shaft extension line of the swivel joint, an excessive force does not act on the rotary sliding surface of the rotary joint, and the durability of the rotary joint is enhanced.
[0021]
  Moreover, the fixing means which fixes the water supply pipe connected to a rotary joint with a desired attachment angle can be provided.
[0022]
  If this fixing means is provided, it can connect to a rotary joint in the state which selected the bending and direction of the hose as a water supply pipe in the optimal direction.
[0023]
  In addition, if the hydraulic passage is composed of a through hole formed in the rotating shaft of the swivel joint and a stainless steel pipe inserted into the through hole, the swivel joint is subjected to plating and special rust prevention treatment. There is no need.
[0024]
  The crusher with a watering device of the present invention includes a crushed body, an actuator that drives the crushed body, a support frame that supports the crushed body, and the support frame.MountedWateringnozzleWhen,the aboveAn attachment portion for attaching the support frame to the work attachment, a turning portion interposed between the support frame and the attachment portion for rotating the crushed body, and provided in the turning portionThe method according to any one of claims 5 to 7.In the crusher with a watering device provided with a swivel joint, the water pressure passageofThe outlet and the watering nozzleIs aboveConnect via water pipeWith beingThe water supply pipe extended from the water supply source to the rotary jointButConnectionIsTheHaveThis is the gist.
[0025]
  According to the crusher of the present invention, there is no need to arrange a rotary joint in the vicinity of the hydraulic cylinder, so there is no need to provide a margin for the water supply pipe leading to the rotary joint, and therefore the length of the support frame is shortened. Is possible. If the crusher is made compact and light, the operability of the crusher is enhanced and the operator's field of view is widened to increase work efficiency.
[0026]
  In addition, the rotary shaft of the rotary jointButArranged on swivel joint rotation axis extension lineHas beenTherefore, an excessive force is not applied to the rotary sliding surface of the rotary joint, and the durability of the rotary joint is improved.
[0027]
  In the above crusher, the watering nozzleIs aboveProvided on the outer wall of the support frame tipIs,the aboveThe water pipe isThe base end on the rotating body side isPiped along the inner wall of the support frameWith,The middle partGuide to the outer wall of the support frame through the through-hole drilled in the support frameHe,Its tip isConnect to water nozzleHas beenCanpreferable.
[0028]
  By piping in this way, it is possible to guide the water supply pipe to the tip of the support frame while avoiding interference and collision with the crushed material as much as possible.
[0029]
  Also,Watering nozzle,A protective cover that protects at least one of the pipes provided on the outer wall of the support frame is detachableBeingIt is preferable.
[0030]
DETAILED DESCRIPTION OF THE INVENTION
  Hereinafter, the present invention will be described in detail based on the embodiments shown in the drawings.
[0031]
  FIG. 1 shows the overall configuration of a crawler-type construction machine equipped with a crusher with a watering device according to the present invention.
[0032]
  In FIG. 1, the construction machine 1 includes a lower traveling body 2 having a crawler 2 a and an upper revolving body 3 that is rotatably mounted on the lower traveling body 2. The work attachment 4 is mounted on the part in a freely undulating manner.
[0033]
  The work attachment 4 is composed of a separate boom 5 composed of a first boom 5a and a second boom 5b, and an arm 6 connected to the tip of the second boom 5b, and water is sprayed on the tip of the arm 6. A crusher with a device (hereinafter abbreviated as a crusher) 7 is attached.
[0034]
  The first boom 5a is raised and lowered by the extension operation of the first boom cylinder 8, the second boom 5b is raised and lowered by the extension operation of the second boom cylinder 9, and the arm 6 swings up and down by the extension operation of the arm cylinder 10. The crusher 7 is rotated in the vertical direction by the expansion and contraction of the crusher cylinder 11.
[0035]
  Moreover, the line 12 shown with a thick continuous line is a hose for supplying water to the watering device of the crusher 7, one is connected to the watering device mentioned later, and the other is connected to the pump which is not shown in figure.
[0036]
  In addition, the crusher 7 shown as a continuous line in FIG. 1 has shown the crushing work attitude | position in a high place, and the crusher 7 shown with a broken line has shown the crushing work attitude | position in a low position.
[0037]
  FIG. 2 is an enlarged view of the configuration of the crusher 7, wherein FIG. 2 (a) is a front view and FIG. 2 (b) is a right side view thereof.
[0038]
  In both figures, the crusher 7 supports a pair of crushing arms (crushing bodies) 20 and 21 having crusher portions 20a and 21a and steel shearing blades 20b and 21b, and the crushing arms 20 and 21 so as to be freely opened and closed. A support frame 22 and a hydraulic cylinder (actuator) 23 installed between upper parts of the crushing arm in the drawing are provided. The crushing arms 20 and 21 in the figure show an open state.
[0039]
  Boss portions 22a and 22b are spaced apart from the lower end portion of the support frame 22, and the boss portions formed at the intermediate portions of the crushing arms 20 and 21 are positioned in correspondence with these boss portions 22a and 22b. Then, by inserting the connecting pins 26a and 26b into both boss portions, the crushing arms 20 and 21 are supported by the support frame 22 via the connecting pins 26a and 26b.
[0040]
  On the other hand, a turning portion 24 having a rotary bearing is fixed to the upper end portion of the support frame 22, and an attachment portion 25 is provided on the upper portion of the turning portion 24. The attachment portion 25 is for connecting to the tip portion of the arm 6 via a connecting pin (not shown). In the figure, 25a and 25b are boss portions into which the connecting pins are inserted.
[0041]
  The support frame 22 has a rotation axis R.P. Rotating around A, 27 and 28 are watering nozzles attached to the front outer wall of the support frame 22, and 29 and 30 are watering nozzles also attached to the rear outer wall.
[0042]
  FIG. The structure of the swivel joint 31 provided in the said turning part 24 coaxially with A is shown, The figure (a) is the front view which showed the AA cross section of the figure (d), (b). The front view which similarly showed the BB cross section, (c) is a right view, (d) is a bottom view.
[0043]
  In each figure, the swivel joint 31 has a rotation axis R.P. A cylindrical outer case 32 having a cylindrical axis A, and a rotating shaft R.P. A cylindrical inner joint 33 rotating around A, and a manifold plate 34 connected to the lower part of the inner joint 33(The inner joint 33 and the manifold plate 34 constitute a rotating body of the present embodiment)And an end plate 35 that is connected to the upper portion of the inner joint 33 and prevents the inner joint 33 from coming out of the outer case 32. Reference numeral 36 denotes a stem for fixing the swivel joint 31 to the turning portion 24.
[0044]
  First, the configuration of the hydraulic passage formed in the swivel joint 31 will be described.
[0045]
  The swivel joint 31 is formed with a pressure oil supply / discharge passage for opening and closing the crushing arms 20 and 21, and the first pressure oil supply / discharge passage is a first fixed-side hydraulic port provided in the outer case 32. (Fixed-side hydraulic port) 32a, an annular groove 32c that communicates with the first fixed-side hydraulic port 32a and is provided on the outer peripheral surface of the inner joint 33, and directions orthogonal to the annular groove 32c ( Two branch hydraulic passages 33a and 33b (formed behind the hydraulic passages 33c and 33d) drilled in parallel to the rotation axis RA, and extensions of the branch hydraulic passages 33a and 33b. Communication hydraulic passages 34a and 34b formed on the manifold plate 34 on the line(The branch hydraulic passages 33a and 33b and the communication hydraulic passages 34a and 34b constitute a branch passage in the present embodiment).And a single collective hydraulic passage 34e that gathers these connecting hydraulic passages 34a and 34b and changes their orientation in the horizontal direction.
[0046]
  On the other hand, the second pressure oil supply / discharge passage communicates with a second fixed-side hydraulic port (fixed-side hydraulic port) 32 b provided in the outer case 32 and the second hydraulic port 32 b, and the outer periphery of the inner joint 33. An annular groove 32d (formed on the upper stage side of the annular groove 32c) that is provided around the surface, and two branch hydraulic passages 33c and 33d that are formed in directions orthogonal to the annular groove 32d. And two communication hydraulic passages 34c and 34d formed in the manifold 34 in communication with the branch hydraulic passages 33c and 33d.(Branch hydraulic passages 33c and 33d and communication hydraulic passages 34c and 34d constitute a branch passage in the present embodiment).The hydraulic passages 34c and 34d are assembled to form a single collective hydraulic passage 34f (in the opposite direction to the hydraulic passage 34e) whose direction is changed in the horizontal direction.
[0047]
  The outlets of the hydraulic passages 34e and 34f constitute a first movable side hydraulic port (movable side hydraulic port) 34g and a second movable side hydraulic port (movable side hydraulic port) 34h in the manifold 34.
[0048]
  The reason why the branch hydraulic passages 33a and 33b (or the branch hydraulic passages 33c and 33d) are shifted toward the outer periphery in the middle is to secure a seal space by the O-ring 37. Reference numeral 38 denotes a greasing passage, and 39 denotes a fixing bolt for connecting the manifold plate 34 to the inner joint 33.
[0049]
  Next, the water pressure passage formed in the swivel joint 31 will be described.
[0050]
  The swivel joint 31 is formed with a water pressure passage for supplying water to the watering nozzles 27 to 30.
[0051]
  Specifically, the rotation axis R.S. A through hole is provided in A, and a hydraulic pipe 40 made of stainless steel is inserted into the through hole. The lower end portion of the water pressure pipe 40 extends in the manifold 34 and is connected to an inverted T-shaped branch water pressure passage 34 i formed in the manifold 34. Water pressure ports 34j and 34k are provided at the outlets of the branch water pressure passage 34i, respectively.
[0052]
  FIGS. 4A and 4B show the arrangement of hoses led out from the manifold 34. FIG. 4A is a front view and FIG. 4B is a right side view.
[0053]
  4B, a tee 41 is connected to the hydraulic pressure port 34j of the manifold 34, and hoses 43 and 44 are connected to both ends of the tee 41 via connectors 42, respectively.
[0054]
  One hose 43 extends in the diameter direction along the lower surface of the swivel unit 24 (see FIG. 4B), hangs down along the inner wall of the support frame 22a on the front side, and is provided on the support frame 22a. It passes through the cut-out hole 22c and is suspended along the outer wall of the support frame 22a.
[0055]
  The hose 43 that hangs down along the outer wall of the support frame 22a is connected to a watering nozzle 28 (see FIG. 2A) attached to the lower end of the support frame 22a.
[0056]
  The other hose 44 is arranged symmetrically with the hose 43 (in FIG. 4 (b)), extends in the opposite direction to the hose 43 along the lower surface of the swivel portion 24, and the inner wall of the support frame 22b on the back side. Is dropped along the outer wall of the support frame 22b through the notch 22c 'provided in the support frame 22b.
[0057]
  The hose 44 that hangs down along the outer wall of the support frame 22b is connected to the watering nozzle 30 (see FIG. 2B) attached to the lower end of the support frame 22b.
[0058]
  As a result, the hoses 43 and 44 are temporarily disposed laterally without being suspended from the swivel joint 31, and are piped along the support frames 22a and 22b.
[0059]
  In FIG. 4 (b), the same arrangement as the hoses 43 and 44 is provided on the back side, and the hoses 45 and 46 are connected to the watering nozzle 27, and the hose 46 is connected to the watering nozzle 29. It is connected.
[0060]
  Accordingly, a pair of watering nozzles 27 and 28 are disposed at the lower end of the support frame 22a, and a pair of watering nozzles 29 and 30 are disposed at the lower end of the support frame 22b, respectively. A total of four watering nozzles 27 to 30 are arranged.
[0061]
  The structure of the watering nozzle 28 is shown in FIG.
[0062]
  In the figure, a guard block 47 for guarding the watering nozzle 28 is provided below the watering nozzle 28, and for the hose 43 including the watering nozzle 28, a belt-like guard plate 48 is provided on the outer wall of the support frame 22a. It is fixed and protects the watering nozzle 28 and the hose 43.
[0063]
  A through hole 47a is formed in the guard block 47 corresponding to the discharge hole of the watering nozzle 28 to prevent debris scattered during the crushing operation from colliding with the watering nozzle 28. In the figure, 49 is a connector for adjusting the size provided between the watering nozzle 28 and the hose 43, and 50 is a clamp.
[0064]
  6A and 6B show a connection structure of the hose 12 introduced into the swivel joint 31. FIG. 6A is a plan view and FIG. 6B is a front view.
[0065]
  In both figures, the hydraulic pipe 40 leading to the inner joint 33 of the swivel joint 31 is connected to the hose 12 via the rotary joint 52. Thereby, even if the crushing arms 20 and 21 are rotated, water can be supplied to the watering nozzles 27 to 30.
[0066]
  The rotary joint 52 is held at a predetermined mounting angle by an angle adjusting plate 53 having a U-shaped notch 53a. Specifically, the angle adjusting plate 53 is formed in a fan shape, and a notch 53a that can be engaged with the parallel side wall 52a of the rotary joint 52 is formed at the bottom of the angle adjusting plate 53. A plurality of notches 53a are formed on the opposite side of the notch 53a. The fixing holes 53b are arranged on the circumference.
[0067]
  The angle adjusting plate 53 is fixed to a mounting portion 54a bent in an L shape from the stand 54 via a fixing bolt 55. The mounting portion 54a has long holes 54b at the same pitch as the fixing holes 53b. Is formed.
[0068]
  Two fixing bolts 55 penetrating the fixing hole 53b are inserted into two of the long holes 54b, and the male thread portion of the fixing bolt 55 penetrating the long hole 54b is The two screw portions formed in the contact plate 56 having a length straddling the two long holes 54b are screwed together. That is, the abutting plate 56 can be fixed in a state where the two fixing bolts 55 are connected.
[0069]
  Reference numeral 57 denotes a fixing screw for fixing the stand 54 to the swivel joint 31.
[0070]
  The angle adjusting plate 53 and the stand 54 function as fixing means for fixing the hose 12 as a water supply pipe at a desired mounting angle.
[0071]
  When connecting the hose 12 to the rotary joint 52, it is necessary to select and fix the mounting direction at an optimum angle in consideration of the bend and direction of the hose, but if the angle adjusting plate 53 is used, Since the attachment angle of the hose 12 connected to the joint 52 can be arbitrarily selected, it is possible to set the optimum angle so that an unnecessary load is not applied to the rotary joint 52.
[0072]
  Further, the hydraulic pipe 40 connected from the rotary joint 52 to the swivel joint 31 is held by a holder 58 having a U-shaped cross section that is erected from the swivel joint 31.
[0073]
  As shown in FIG. 7, the holder 58 is configured such that a nut 52 a below the rotary joint 52 can be sandwiched from both sides, and a bolt for inserting a fastening bolt 59 into the opening edge of the holder 58. Holes 58a and 58a are formed. By passing the tightening bolt 59 through the bolt holes 58a and 58a and tightening with the nut 59a, the hydraulic pipe 40 can be held stably with respect to the swivel joint 31.
[0074]
  Further, if the hydraulic pipe 40 is held using the holder 58 as described above, the connection portion between the rotary joint 52 and the hydraulic pipe 40 is not loosened, and the durability of the rotary joint 52 is improved. To be able to.
[0075]
  The swivel joint of the present invention is built in the swivel unit 24 of the crusher in the above embodiment, but is not limited to this, and is applicable to any joint unit that connects the movable hydraulic pipe and the fixed hydraulic pipe. can do.
[0076]
  Further, in the swivel joint of the present invention, the plurality of branch hydraulic passages are constituted by two parallel passages in the above embodiment, but may be constituted by more parallel passages.
[0077]
  Moreover, although the crusher with a watering device of the present invention is applied to a construction machine in which the lower traveling body is configured by a crawler in the above-described embodiment, the present invention is not limited thereto, and is also applied to a construction machine configured by a wheel. You can also.
[0078]
【The invention's effect】
  As is apparent from the above description, according to the present invention of claim 1, the hydraulic supply / discharge path provided in the swivel joint is passed through the annular groove from the fixed-side hydraulic port of the outer case.Rotating bodyAnd lead toRotating bodyDistributed in a plurality of branch passages provided inRotating bodyMovable hydraulic port provided on(Collecting hydraulic passage)The swivel joint can be made compact while ensuring the maximum flow path in the swivel joint.
[0079]
  Therefore, if this swivel joint is incorporated in a crusher with a crushing arm rotating, the crusher can be reduced in weight and the crusher can be made compact.
[0080]
  Claim3According to the present invention, the branch passage isIn the rotating bodyPlaced next to each otherCollective hydraulic passageTherefore, the flow resistance can be reduced while ensuring the maximum flow path in the swivel joint.
[0081]
  Claim4According to the present invention, since a through hole for inserting a pipe, a cable or the like is provided in a space created in the rotation center shaft portion of the swivel joint by providing a plurality of branch passages, It is possible to pass through mechanical parts such as rods, electrical wiring, another hydraulic path, hydraulic piping, drain, etc., which can handle various working forms.
[0082]
  According to the present invention of claim 6, since the fixing means for fixing the water supply pipe connected to the rotary joint at a desired mounting angle is provided, the bending and direction of the hose as the water supply pipe are selected in the optimum direction. Can be connected to a rotary joint.
[0083]
  According to the seventh aspect of the present invention, the hydraulic passage is constituted by a through hole formed in the rotating shaft of the swivel joint and a stainless steel pipe inserted into the through hole. A water supply passage for watering can be configured without any special rust prevention treatment.
[0084]
  Claim8According to the present invention, in the crusher with a sprinkler configured to rotate the crushed body, the outlet of the hydraulic passageWhenSince the water nozzle is connected to the sprinkler nozzle and the water supply source is connected to the rotary joint, the length of the support frame can be shortened. As a result, the crusher becomes compact and lightweight, and the crusher As a result, the operator's field of view and the work efficiency are increased.
[0085]
  Further, since the rotary shaft of the rotary joint is arranged on the rotary shaft extension line of the swivel joint, an excessive force is not applied to the rotary sliding surface of the rotary joint, and the durability of the rotary joint is improved.
[0086]
  Claim9According to the present invention, the watering nozzle is provided on the outer wall of the front end portion of the support frame, and after the water supply pipe is piped along the inner wall of the support frame, the watering nozzle is guided to the outer wall of the support frame through the through hole formed in the support frame. Therefore, the water supply pipe can be guided to the tip of the support frame while avoiding interference and collision with the crushed material as much as possible.
[0087]
  Claim10According to the present invention, since the protective cover that protects at least one of the piping and the watering nozzle provided on the outer wall of the support frame is detachably provided, it is possible to prevent the crushed material from colliding with the watering nozzle. . Moreover, since the protective cover can be removed, the watering nozzle can be easily maintained.
[Brief description of the drawings]
FIG. 1 is an overall view of a construction machine equipped with a crusher with a watering device of the present invention.
2A is a front view of a crusher with a watering device, and FIG. 2B is a right side view thereof.
3A is a front view of the swivel joint taken along the line AA of the swivel joint of FIG. 2, FIG. 3B is a front view of the cross section BB, FIG. 3C is a right side view, and FIG. It is a bottom view.
4A is a front view showing a hose led out from a swivel joint, and FIG. 4B is a right side view thereof.
FIG. 5 is an enlarged side view of a watering nozzle portion.
6A is a plan view showing a configuration of a rotary joint above the swivel joint, and FIG. 6B is a front view.
7 is a view taken along the line CC in FIG. 6B. FIG.
8A is a front view showing a configuration of a conventional crusher with a watering device, and FIG. 8B is a right side view thereof.
[Explanation of symbols]
    1 Construction machinery
    2 Lower traveling body
    3 Upper swing body
    4 Work attachment
    5 Separate boom
    6 Arm
    7 Crusher
  12 Hose
  20, 21 Crushing arm
  22 Support frame
  23 Hydraulic cylinder
  24 Turning part
  25 Mounting part
  27-30 Watering nozzle
  31 Swivel joint
  32 Outer case
  32a 1st hydraulic port
  32b Second hydraulic port
  32c, 32d groove
  33 Inner joint
  33a, 33b Hydraulic passage
  33c, 33d Hydraulic passage
  34 Manifold
  34a, 34b Vertical hole
  34e, 34f Hydraulic passage
  34g, 34h Second hydraulic port
  35 End plate
  36 stem
  37 O-ring
  43,44 hose
  52 Rotary joint

Claims (10)

In the swivel joint that connects the hydraulic piping provided on the movable side and the hydraulic piping provided on the fixed side,
An outer case, a rotating body partially accommodated in the outer case in a state of being rotatable about a predetermined rotation axis, and at least one hydraulic supply / discharge path provided in the outer case and the rotating body. Prepared,
The hydraulic supply / discharge path includes a fixed-side hydraulic port provided in the outer case, an annular groove formed on an outer peripheral surface of a portion of the rotating body housed in the outer case and capable of communicating with the fixed-side hydraulic port. a plurality of branch passages communicating with the annular groove of this is formed in the rotating body along an axial direction of the rotary shaft, a set hydraulic passage to assemble the respective branch passages provided in the rotating body, A swivel joint comprising a movable hydraulic port provided in the rotating body in communication with the collective hydraulic passage . The swivel joint according to claim 1, wherein the collective hydraulic passage and the movable hydraulic port are provided in a portion of the rotating body that is not housed in the outer case. Each branch passage is swivel joint according to claim 1 or 2, characterized in that it is coupled to the set oil pressure passage with being positioned adjacent the rotating body. Swivel joint according to any one of claims 1-3, characterized in that the through-hole is provided in the central axis portion of the rotating body. A water pressure passage provided in the rotating body, and a rotary joint attached to the rotating body on a rotating shaft thereof are further provided, and the water pressure passage is provided on the movable side and an inlet communicating with the rotary joint. The rotary joint is connectable to a water supply pipe provided on a fixed side and is configured to be rotatable with respect to the rotating body. The swivel joint according to any one of claims 1 to 4. 6. The swivel joint according to claim 5, further comprising fixing means for fixing the water supply pipe connected to the rotary joint at a desired mounting angle. The water pressure passage includes a through hole formed along the rotation axis of the rotating body and a stainless steel pipe inserted into the through hole. The swivel joint described. And crushing body, an actuator for driving the crushing member, a support frame for supporting the crushing body, and watering nozzle attached to the support frame, and a mounting portion for mounting the support frame on the working attachment, said support A swivel part interposed between the frame and the mounting part for rotating the crushed body, and the swivel joint according to any one of claims 5 to 7 provided in the swivel part. In crusher with sprinkler,
With an outlet and the shower nozzle of the pressure passage is connected via the water supply pipe, with water spraying unit, characterized in that the water supply pipe extending from the water supply source to the rotary joint is connected crushed Machine. The watering nozzle is provided on the outer wall of the distal end portion of the support frame, and the water supply pipe has a base end portion on the side of the rotating body that is piped along the inner wall of the support frame, and a midway portion is drilled in the support frame. The crusher with a sprinkler according to claim 8, wherein the crusher is guided to an outer wall of the support frame through a through-hole provided, and a tip portion thereof is connected to the watering nozzle. The crusher with a watering device according to claim 8 or 9, wherein a protective cover for protecting at least one of the watering nozzle and the pipe provided on the outer wall of the support frame is detachably provided.

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