JP6610314B2 - Swivel work machine and float device used therefor - Google Patents

Description

  The present invention relates to a swivel work machine and a float device of a jack-up device used therefor.

  Patent Document 1 discloses a conventional turning work machine. The swing type work machine described in Patent Document 1 includes a track frame, a swing body mounted on the track frame, and a jackup device attached to the track frame. The jackup device is configured to jack up a track frame.

  The jackup device includes a hydraulic cylinder that expands and contracts in the vertical direction and a float that is attached to a cylinder rod of the hydraulic cylinder. The jack-up device is used, for example, when loading a truck frame on a trailer loading platform, lowering it from the loading platform, or changing the width of a crawler.

JP 2007-230747 A

  By the way, the height of the trailer loading platform is not constant for all trailers and varies depending on the trailer. For this reason, in the jack-up device, the stroke of the cylinder rod of the hydraulic cylinder is required to have a length that can correspond to the height of the loading platform of all trailers.

  However, the hydraulic cylinder of the jack-up device has a limited length because the revolving body is located immediately above the hydraulic cylinder. For this reason, there is a restriction on the stroke of the hydraulic cylinder, and there is a problem in that it cannot be made longer than a certain length.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a swivel working machine capable of increasing the jack-up amount by the jack-up device as necessary, and a float device used therefor. Is to provide.

  A turning work machine of the present invention comprises a track frame, an upper turning body mounted on the track frame, and a plurality of jackup devices provided on the track frame for jacking up the track frame, Each of the plurality of jackup devices includes a first jackup cylinder made of a hydraulic cylinder, and a float device provided on a cylinder rod of the first jackup cylinder. It has the 2nd jackup cylinder which used the hydraulic fluid which flows through the hydraulic circuit of a jackup cylinder as a drive source.

  In this turning type work machine, it is preferable that the float device is detachably attached to a cylinder rod of the first jack-up cylinder.

  Further, in this turning type work machine, the track frame is provided with a mounted portion to which the float device can be attached, and the second jack is mounted in a state where the float device is attached to the mounted portion. It is preferable that the track frame can be jacked up by extending the up cylinder.

  A float apparatus according to the present invention is used in the above-described swivel work machine, wherein the second jackup cylinder has a port provided in a cylinder tube, and the port is the first jackup. It is configured to be connectable with piping of a hydraulic circuit of a cylinder.

  According to the swivel type working machine and the float device of the present invention, the track frame is normally jacked up by the first jackup cylinder, and when the stroke is insufficient, the second jackup cylinder of the float device is used. Since the shortage of the stroke can be compensated, the amount of jackup by the jackup device can be increased as necessary.

It is a side view of a revolving type working machine concerning one embodiment of the present invention. It is a top view of a track frame same as the above. It is a side view of the jackup apparatus same as the above. It is a perspective view of a float apparatus same as the above. FIG. 5A is a partially broken side view of the above float apparatus in a contracted state. FIG. 5B is a partially cutaway side view of the above float apparatus in an extended state. It is a front view in the state where the jackup device same as the above jacked up the track frame. 7A, 7B, and 7C are explanatory diagrams of the operation of the jackup device described above. FIG. 8A is a front view of a state in which the float device is attached to the attached portion of the track frame. FIG. 8B is an enlarged view of a portion A in FIG. 8A. FIG. 9A is a side view for explaining a state in which the above-described revolving work machine is jacked up from a state where it is transported by a trailer. FIG. 9B is a side view in which the trailer is moved in a state where the above-described turning type work machine is jacked up.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

  The revolving work machine of this embodiment is a crawler crane. As shown in FIG. 1, the swing type work machine includes an upper swing body 1, an attachment (not shown) attached to the upper swing body 1, a hoisting device 2 that drives the attachment to hoist, and a lower traveling body 3. I have.

  In the following, the front-rear direction is determined based on the direction of the driver seat of the upper swing body 1, and unless otherwise specified, the front-rear direction of the upper swing body 1 and the traveling direction of the lower traveling body 3 are parallel to each other. Based on Further, a direction along a horizontal plane perpendicular to the front-rear direction is defined as a left-right direction.

  The upper swing body 1 is attached to the lower traveling body 3 so as to be swingable about a vertical axis. Although not shown in particular in the upper swing body 1, an attachment is attached to the front part via a boom foot pin. The attachment is, for example, a part that hangs a load, and is connected to the upper swing body 1 so as to be rotatable about a horizontal axis that is orthogonal to the front-rear direction. The hoisting device 2 is driven so as to hoist the attachment.

  The lower traveling body 3 is a vehicle body that can be grounded and moved on the ground. The lower traveling body 3 supports the upper swing body 1, the attachment, and the hoisting device 2. The lower traveling body 3 of the present embodiment is configured by a crawler type carrier having a pair of crawlers 43. That is, as shown in FIG. 2, the lower traveling body 3 includes a track frame 31, a pair of crawler frames 4, a crawler 43, a crawler telescopic cylinder 44 that moves the crawler frame 4 in the left-right direction, and a jack-up device 5. And. In FIG. 2, for convenience of explanation, one of the pair of crawlers 43 is omitted.

  The track frame 31 is a frame constituting the main body of the lower traveling body 3. A slewing bearing 32 is attached to the center of the track frame 31, and the upper slewing body 1 is slidably attached via the slewing bearing 32.

  A pair of axles 33 extending in the left-right direction are provided at both ends in the front-rear direction of the track frame 31. A pair of crawler frames 4 is slidably attached to the pair of axles 33 in the left-right direction.

  The crawler frame 4 extends in the front-rear direction, and supports the crawler 43 in a movable manner. As shown in FIG. 1, a drive sprocket 41 for driving the crawler 43 is provided at one end portion in the longitudinal direction of the crawler frame 4, and an idler 42 is provided at the other end portion in the longitudinal direction. The crawler 43 is moved along the longitudinal direction of the crawler frame 4 by the drive sprocket 41 and the idler 42.

  One crawler 43 is provided for each crawler frame 4. As shown in FIG. 2, the crawler 43 has a width in the left-right direction and a length in the front-rear direction. The crawler 43 is configured by connecting a plurality of shoes with pins, and is formed endless in the length direction (longitudinal direction).

  Further, the pair of crawler frames 4 are configured to be movable toward and away from each other (left and right direction), whereby the width of the lower traveling body 3 can be changed. The pair of crawler frames 4 is configured to be movable by a crawler telescopic cylinder 44. Specifically, the crawler telescopic cylinder 44 has a cylinder tube fixed to the track frame 31 and a pair of crawler frames 4 fixed to the cylinder rod.

  The track frame 31 is provided with a plurality of jackup devices 5. The jackup device 5 is configured to jack up the track frame 31. As shown in FIG. 3, each jackup device 5 includes a first jackup cylinder 51, a float device 8, an arm portion 7, and a fixing pin 72.

  The first jack-up cylinder 51 includes a cylinder tube 53 arranged so that its axial direction is along the vertical direction, and a cylinder rod 52 that can be advanced and retracted along the axial direction of the cylinder tube 53. It is configured to be stretchable. The first jackup cylinder 51 is constituted by a hydraulic cylinder.

  The first jackup cylinder 51 is connected via a pipe 62 to a hydraulic unit (not shown) having a hydraulic oil tank and a hydraulic pump. Specifically, the cylinder tube 53 of the first jackup cylinder 51 is provided with a first port 530 and a second port 531, and the first port 530 and the second port 531 include A pipe 62 is detachably connected via a coupler 61. The hydraulic unit is accommodated inside the upper swing body 1. The first jack-up cylinder 51 is disposed immediately below the upper swing body 1, and is disposed on the lower surface of the upper swing body 1 with a certain gap.

  The arm unit 7 holds the first jackup cylinder 51. The arm unit 7 is connected to the track frame 31 via a vertical shaft 71 and can rotate around the vertical shaft 71. The arm portion 7 is connected to a pair of upper and lower protruding pieces 36 protruding in the front-rear direction from the track frame 31 via a vertical shaft 71. A first jackup cylinder 51 is fixed to the tip of the arm portion 7. Thereby, the first jackup cylinder 51 is configured to be movable around the vertical axis 71.

  The fixing pin 72 connects the track frame 31 and the arm part 7 at a position different from the vertical shaft 71 and holds the arm part 7 at that position.

  The float device 8 is a portion to be grounded in the jack-up device 5 and is disposed between the cylinder rod 52 of the first jack-up cylinder 51 and an installation surface such as the ground as shown in FIG. The float device 8 is detachably attached to the tip of the cylinder rod 52 of the first jackup cylinder 51. The float device 8 of the present embodiment is configured to be extendable, and the stroke of the float device 8 can be added to the stroke of the first jack-up cylinder 51 as the stroke of the jack-up device 5. The float apparatus 8 includes a second jackup cylinder 81, a base portion 84, and a connecting portion 87.

  As shown in FIGS. 5A and 5B, the second jack-up cylinder 81 is configured to be extendable and contractable in the vertical direction. The second jackup cylinder 81 is constituted by a hydraulic cylinder. The second jack-up cylinder 81 includes a cylinder tube 83 disposed so that the axial direction is along the vertical direction, and a cylinder rod 82 provided in the cylinder tube 83 so as to be able to advance and retract. The axis of the cylinder rod 82 is located on the same straight line as the axis of the cylinder rod 52 of the first jackup cylinder 51.

  The cylinder tube 83 is provided with a first port 830 and a second port 831. A pipe 62 is detachably connected to the first port 830 and the second port 831 via a coupler 61. The second jack-up cylinder 81 is connected to the piping 62 of the hydraulic circuit of the first jack-up cylinder 51, and the hydraulic oil of the first jack-up cylinder 51 is used as a drive source.

  The base part 84 holds the second jack-up cylinder 81 in a state where it is erected on the installation surface. As shown in FIG. 4, the base portion 84 includes a horizontal plate portion 85 placed on the installation surface and a plurality of vertical ribs 86 that reinforce the cylinder tube 83 standing on the horizontal plate portion 85 (this embodiment). 4). The plurality of vertical ribs 86 are arranged radially in plan view with a certain interval around the axis of the cylinder tube 83.

  The connecting portion 87 is fixed to the tip of the cylinder rod 82 of the second jackup cylinder 81, and the tip of the cylinder rod 82 of the second jackup cylinder 81 and the cylinder rod of the first jackup cylinder 51. The tip of 52 is connected. As shown in FIG. 4, the connecting portion 87 is formed in a substantially U shape in plan view that opens to the side. The connecting portion 87 is configured such that the tip of the cylinder rod 52 of the first jack-up cylinder 51 can be inserted from the side opening.

  As shown in FIG. 5A, the connecting portion 87 has a locking projection 88 protruding toward the center side. The locking projection 88 is formed along the inner peripheral edge of the upper end of the connecting portion 87. The locking protrusion 88 restricts the cylinder rod 52 of the first jack-up cylinder 51 from coming out upward. Further, the connecting portion 87 has a retaining pin 89 that prevents the first jack-up cylinder 51 from coming out sideways in a state where the cylinder rod 52 of the first jackup cylinder 51 is locked to the locking protrusion 88.

  A hemispherical receiving portion 870 that receives the hemispherical tip surface of the cylinder rod 52 of the first jackup cylinder 51 is formed on the bottom surface of the connecting portion 87.

  For example, the float apparatus 8 operates as follows. Normally, as shown in FIG. 5A, the second jack-up cylinder 81 is in a contracted state. In this state, when the hydraulic oil flows into the second port 831 and out of the first port 830, the cylinder rod 82 moves upward as shown in FIG. 5B, and the second jack-up cylinder 81 is moved upward. Expands.

  As shown in FIG. 6, the piping 62 connected to the float device 8 of the present embodiment is obtained by removing the piping 62 of the hydraulic circuit connected to the first jackup cylinder 51 from the first jackup cylinder 51. Is. That is, in the jackup device 5 of the present embodiment, the piping 62 of the hydraulic circuit is either the port 530, 531 of the first jackup cylinder 51 or the port 830, 831 of the second jackup cylinder 81. Selectively connected.

  In the jack-up device 5, for example, as shown in FIG. 7A, a pipe 62 is connected to the first jack-up cylinder 51 in a normal state. In this state, the first jackup cylinder 51 is extended to jack up the track frame 31 (FIGS. 7A and 7B). In this state, when the stroke of the jack-up device 5 is insufficient, the operator removes the pipe 62 connected to the first jack-up cylinder 51 and uses the pipe 62 as the second jack-up of the float device 8. Connect to cylinder 81. Thereafter, as shown in FIG. 7C, the second jack-up cylinder 81 of the float device 8 is extended to compensate for the insufficient stroke of the first jack-up cylinder 51.

  Further, the float device 8 of the present embodiment is configured to be detachable from the cylinder rod 52 of the first jackup cylinder 51. Therefore, the float device 8 removed from the cylinder rod 52 can be mounted on the track frame 31 and jacked up directly as shown in FIGS. 8A and 8B. The track frame 31 is provided with a plurality of attached portions 34 that can be attached to the connecting portion 87 of the float apparatus 8.

  Each attached portion 34 is formed in the same shape as the tip of the cylinder rod 52 of the first jackup cylinder 51, as shown in FIG. 8B. Specifically, an enormous portion 35 that can be locked to the connecting portion 87 of the jackup device 5 is formed at the tip of each attached portion 34, and when the attached portion 34 is connected to the connecting portion 87, The enormous portion 35 is locked in the vertical direction with respect to the locking protrusion 88. Further, the tip end surface of the attached portion 34 is formed in a spherical shape.

  The plurality of attached portions 34 are respectively provided on the lower surfaces of the pair of axles 33 of the track frame 31. The pair of attached portions 34 provided on each axle 33 are arranged apart from each other in the left-right direction (that is, a total of four locations). When the second jack-up cylinder 81 is extended in a state where the float device 8 is attached to these attached portions 34, the track frame 31 can be jacked up.

  The swivel working machine having such a configuration is assembled as follows, for example, after being transported to the work site by the trailer 9.

  As shown in FIG. 9A, the swing type work machine is transported in a state where the track frame 31 and the upper swing body 1 are mounted on the loading platform 91 of the trailer 9. The swing type work machine is transported with the crawler frame 4 removed from the track frame 31.

  When the truck frame 31 is carried into the work site, the operator fixes the jackup device 5 at a predetermined position using the fixing pins 72. Thereafter, the operator attaches the float device 8 to the tip of the cylinder rod 52 of the first jackup cylinder 51.

  Next, the operator extends the first jackup cylinder 51 and jacks up the track frame 31. At this time, the jack-up amount of the track frame 31 may be insufficient with the stroke of the first jack-up cylinder 51. In this case, the pipe 62 connected to the first jack-up cylinder 51 is replaced with the second jack-up cylinder 81 of the float device 8, and the second jack-up cylinder 81 is extended. Thereafter, in a state where the track frame 31 is jacked up, the trailer 9 is moved forward as shown in FIG. 9B.

  Next, the worker attaches the crawler frame 4 to the axle 33 of the track frame 31 in a jacked up state. In addition, the operation | work which mounts a turning type work machine in the trailer 9 performs the above-mentioned process reversely.

(effect)
As described above, the revolving work machine of the present embodiment includes the track frame 31, the upper revolving unit 1 mounted on the track frame 31, and a plurality of jacks provided on the track frame 31 to jack up the track frame 31. And jack-up device 5. Each of the plurality of jackup devices 5 includes a first jackup cylinder 51 formed of a hydraulic cylinder, and a float device 8 provided on a cylinder rod 52 of the first jackup cylinder 51. The float device 8 includes a second jackup cylinder 81 that uses hydraulic oil flowing in the hydraulic circuit of the first jackup cylinder 51 as a drive source. According to this configuration, even if the stroke of the first jackup cylinder 51 that is normally used is insufficient, the insufficient jackup amount can be compensated by using the second jackup cylinder 81. As a result, for example, it is possible to omit troublesome work such as placing a wood block between the float apparatus 8 and the installation surface and removing the wood block after jacking up, thereby improving work efficiency.

Moreover, the turning type work machine of the present embodiment has the following additional configuration. That is, the float apparatus 8 of this embodiment is detachably attached to the cylinder rod 52 of the first jackup cylinder 51. According to this structure, since the float apparatus 8 can be removed at the time of conveyance of the trailer 9, it can prevent that the lower end of the jackup apparatus 5 contacts the ground during conveyance. Moreover, turning of this embodiment The type work machine has the following additional configuration. In other words, the track frame 31 of the present embodiment is provided with a mounted portion 34 to which the float apparatus 8 can be attached. The swing type work machine is configured to be able to jack up the track frame 31 by extending the second jack up cylinder 81 in a state where the float apparatus 8 is attached to the attached portion 34. According to this configuration, for example, when it is desired to change the width of the crawler frame 4, it is not necessary to move and fix the arm portion 7 of the jackup device 5 to a predetermined position. The frame 31 can be jacked up.

  In the float device 8 of the present embodiment, the second jackup cylinder 81 has ports 830 and 831 provided in the cylinder tube 83. The ports 830 and 831 are configured to be connectable to the piping 62 of the hydraulic circuit of the first jackup cylinder 51. According to this structure, the float apparatus 8 of this embodiment can be used also for the existing turning type work machine.

(application)
The pipe 62 of this embodiment is configured to be selectively connected to the second jackup cylinder 81 and the first jackup cylinder 51. In the present invention, for example, the first jack A branch pipe branched from the hydraulic circuit of the up cylinder 51 may be connected to the second jack up cylinder 81.

  The hydraulic cylinders constituting the first jack-up cylinder 51 and the second jack-up cylinder 81 of the present embodiment are double-acting hydraulic cylinders having a pair of ports, but are, for example, single-acting hydraulic cylinders. There may be one port for each hydraulic cylinder.

  Although the revolving type working machine of this embodiment was a crane, in this invention, an excavator, a demolition machine, a crusher, etc. may be sufficient, for example.

  In addition, the design of the swivel work machine of this embodiment can be changed as appropriate without departing from the spirit of the present invention.

DESCRIPTION OF SYMBOLS 1 Upper revolving body 31 Track frame 5 Jackup apparatus 51 1st jackup cylinder 52 Cylinder rod 62 Piping 8 Float apparatus 81 2nd jackup cylinder 83 Cylinder tube 830 1st port (port)
831 Second port (port)

Claims (4)

Track frame,
An upper swing body mounted on the track frame;
A plurality of jack-up devices provided on the track frame to jack up the track frame;
Each of the plurality of jackup devices includes:
A first jack-up cylinder comprising a hydraulic cylinder;
A float device provided on a cylinder rod of the first jack-up cylinder,
The above-mentioned float device has a second jackup cylinder using hydraulic oil flowing in the hydraulic circuit of the first jackup cylinder as a drive source. The swivel work machine according to claim 1, wherein the float device is detachably attached to a cylinder rod of the first jack-up cylinder. The track frame is provided with an attached portion to which the float device can be attached,
3. The track frame can be jacked up by extending the second jackup cylinder in a state in which the float device is attached to the attached portion. Swivel work machine. A float device used in the swivel working machine according to any one of claims 1 to 3,
The second jack-up cylinder has a port provided in a cylinder tube;
The float device is characterized in that the port is configured to be connectable to piping of a hydraulic circuit of the first jackup cylinder.

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