JP5913054B2 - Work machine - Google Patents

Description

  The present invention relates to a work machine such as a hydraulic excavator provided with a swivel joint that enables supply of pressure oil from a revolving body side to a traveling body side.

  This type of work machine is disclosed in Patent Document 1. The work machine disclosed in Patent Document 1 is a hydraulic excavator. The hydraulic excavator includes a traveling body, a revolving body disposed on the traveling body, and a work device attached to the revolving body and including a boom, an arm, and a bucket. The turning center of the revolving body includes a housing fixed to the traveling body, and a spindle that is accommodated in the housing and that rotates as the revolving body turns, and supplies pressure oil from the revolving body side to the traveling body side. A swivel joint is provided to enable this.

  The hydraulic excavator is provided with a swivel joint detent structure. Each swivel joint detent structure includes a detent member disposed on the swivel body and attached to the spindle of the swivel joint, and a stopper for restricting the rotation of the detent member.

  Although not shown in Patent Document 1, conventionally, for example, a connector used for transmission of a control signal from a control processing device arranged in a driver's cab provided on a turning body to an electric device provided on a traveling body is provided. The connector is attached to a rotation preventing member included in the swivel joint rotation preventing structure described above. Hereinafter, this prior art will be described with reference to FIG.

  The work machine shown in FIG. 6 is also a hydraulic excavator, for example, and a swinging body is disposed on a traveling body (not shown). An anti-rotation member 41 attached to a spindle of a swivel joint (not shown) and an extending portion 41a of the anti-rotation member 41 are engaged on the revolving frame 40 of the revolving body, so And a swivel joint detent structure including a stopper 42 for restricting the movement.

  A slip ring 43 is attached on the anti-rotation member 41, and a connector 44 and a cover member 46 covering the connector 44 are attached on the same anti-rotation member 41. A harness 45 that connects the slip ring 43 and the connector 44 is routed across the upper surface of the slip ring 43. For example, a cord connected to a control processing device provided in a driver's cab disposed on the revolving structure can be connected to the connector 44. Further, the cover member 46 described above is provided so that foreign matters such as earth and sand do not come into contact with the connector 44 or external force due to the foreign matters is not applied to the connector 44 during work by the working device.

  The spindle of the swivel joint (not shown) and the central part of the housing are provided with a through hole drilled in the vertical direction, and the slip ring and an electrical device such as a brake device arranged on the traveling body are connected to the through hole. The harness 47 to be received is accommodated.

JP 2004-301305 A

  In the prior art shown in FIG. 6 in which the slip ring 43 and the connector 44 are attached to the rotation stopper member 41 of the swivel joint, since the cover member 46 covering the connector 44 is provided, the number of parts increases and the production cost increases. There is a problem of getting higher. Moreover, since the operation | work which attaches the cover member 46 to the rotation prevention member 41 is needed, an assembly man-hour increases and the manufacturing cost also tends to become high also from this point.

  The present invention has been made based on the above-described prior art, and an object thereof is to provide a work machine capable of protecting a connector connected to a slip ring without requiring a dedicated cover member. .

To achieve this object, the present invention provides a traveling body, a revolving body disposed on the traveling body, a working device attached to the revolving body, a housing fixed to the traveling body, A swivel joint that is housed in a housing and includes a spindle that rotates as the swivel body turns, is disposed at a turning center of the swivel body, and enables supply of pressure oil from the revolving body side to the traveling body side; A swivel joint detent structure disposed on the swivel body and including a detent member attached to the spindle of the swivel joint, and a slip ring attached to the detent member of the swivel joint detent structure from above. a first harness that connects the connector to be held in the detent member, and the slip ring and the connector, the Sui Housed in the Le joint, and the slip ring, in a work machine that includes a second harness that connects the electrical device disposed on the traveling body, the connecting portion between the slip ring of the first harness Is arranged on the upper side of the anti-rotation member, and the connector is arranged on the lower side of the anti-rotation member.

  The present invention configured as described above can prevent foreign matter such as earth and sand flying from above the connector from coming into contact with the connector by the rotation preventing member. Moreover, it can prevent that the external force by a foreign material is given to a connector by a rotation prevention member. That is, the present invention can protect the connector connected to the slip ring by the detent member without requiring a dedicated cover member.

  Further, the present invention is characterized in that, in the above invention, a bracket is provided that holds the connector and is fixed to the detent member.

According to the present invention configured as described above, the connector can be firmly fixed to the lower side of the anti-rotation member via the bracket, and the connector can be stably held by the anti-rotation member.

Further, the present invention is characterized in that, in the above invention, the rotation preventing member is provided with a notch portion into which a part of the first harness for connecting the connector and the slip ring can enter.

In the present invention configured as described above, when the first harness connecting the slip ring and the connector is stepped on by mistake, a part of the first harness that receives the pressing force is notched in the rotation preventing member. Enter the club. That is, when the first harness is stepped on, the first harness can be released into the notch portion of the detent member. Thereby, damage, such as a disconnection of the 1st harness when the 1st harness is stepped on, can be prevented.

In the present invention, since the connector connected to the slip ring is arranged below the anti-rotation member attached to the spindle of the swivel joint, it is connected to the slip ring by the anti-rotation member without requiring a dedicated cover member. Connector can be protected. Thereby, compared with the past, the number of parts can be reduced and the number of assembly steps can be reduced. These can reduce the production cost.

It is a side view which shows the wheel shovel which comprises one Embodiment of the working machine which concerns on this invention. It is a top view which shows the turning frame with which this embodiment is equipped. It is a longitudinal cross-sectional view which shows the attachment structure of the swivel joint with which this embodiment is equipped. It is a perspective view which shows the state which looked at the rotation stopper structure of the swivel joint with which this embodiment is provided from one side. It is a perspective view which shows the state which looked at the rotation prevention structure of the swivel joint with which this embodiment is provided from the other side. It is a perspective view which shows the rotation stopper structure of the swivel joint with which the conventional working machine is equipped.

  Embodiments of a work machine according to the present invention will be described below with reference to the drawings.

  The work machine according to the present embodiment includes a hydraulic excavator, for example, a wheel excavator. As shown in FIG. 1, the wheel excavator includes a traveling body 3 having a front wheel 1 and a rear wheel 2, and a revolving body 5 disposed on the traveling body 3 via a revolving wheel 4. A work device 6 for excavating earth and sand is attached to the revolving body 5 so as to be rotatable in the vertical direction. The working device 6 includes a boom 7 attached to the swing body 5, an arm 8 attached to the tip of the boom 7, and a bucket 9 attached to the tip of the arm 8.

  A driver's cab 11 is disposed at a front position of the revolving frame 10 of the revolving structure 5, and a counterweight 12 that secures a weight balance is disposed at a rear position. Between the cab 11 and the counterweight 12, an engine bay 13 in which an engine and a hydraulic pump driven by the engine are accommodated is disposed.

  As shown in FIGS. 2 and 3, the swivel frame 20 that forms the turning center of the revolving structure 2 is provided with a swivel joint 20 that enables pressure oil to be supplied from the revolving structure 5 to the traveling structure 3. ing.

  The swivel joint 20 includes a housing 20a that is fixed to the traveling body 3, a spindle 20b that is accommodated in the housing 20a and rotates as the revolving body 5 rotates, and a lid 20c that is attached to the bottom of the housing 20a. Including.

  On the revolving frame 10 of the revolving structure 5, a rotation preventing member 21 attached to the spindle 20 b of the swivel joint 20 and a stopper 22 for restricting the rotation of the extending portion 21 a of the rotation preventing member 21 are provided.

Are a slip ring 23 the top portion attached to the detent member 21. A through hole drilled in the vertical direction is formed in the central portion of the spindle 20b and the housing 20a of the swivel joint 20, and a protective member 24 having a U-shaped cross section, for example, is disposed in the through hole. The lower end of the protective member 24 is fitted into a U-shaped groove (not shown) formed in the lid 20c of the swivel joint 20. That is, the protection member 24 is held by the traveling body 5 via the lid portion 20c of the swivel joint 20 and the housing 20a. This is protected member 24, a slip ring 23 described above, the harness 25 for connecting the electrical equipment of the braking device or the like provided in the running body 3 (second harness) is housed.

As shown in FIGS. 4 and 5, the present embodiment includes a connector 30 that is connected to the slip ring 23 via a harness 31 (first harness) , and a connection portion of the harness 31 with the slip ring 23. Is arranged on the upper side of the anti-rotation member 21, and the connector 30 is arranged on the lower side of the anti-rotation member 21. For example, as shown in FIG. 5, the connector 30 is held by a bracket 32 fixed to the detent member 21. For example, a cord connected to a control processing device provided in the cab 11 of the revolving unit 5 can be connected to the connector 30.

  As shown in FIGS. 4 and 5, for example, a portion of the harness 31 that connects the connector 30 and the slip ring 23 can be inserted into a portion of the anti-rotation member 21 located on the side opposite to the extending portion 21 a. A notch 21b is provided.

  In the wheel excavator according to the present embodiment configured as described above, when the turning body 5 turns with respect to the traveling body 3 in conjunction with excavation, earthing work or the like, the rotation excavation member 21 is engaged with the stopper 22. The spindle 20b of the swivel joint 20 and the slip ring 23 rotate integrally. At this time, the spindle 20b rotates with respect to the virtual vertical axis of the swivel joint 20. However, regardless of the rotation of the spindle 20b, a known function of the swivel joint 10 allows the traveling body 3 from the revolving body 5 side. Pressure oil can be supplied to the side. Similarly, the slip ring 23 rotates with respect to the virtual vertical axis of the swivel joint 20, but the harness 31 housed in the protective member 24 is held stationary regardless of the rotation of the slip ring 23, and this harness The control signal can be transmitted from the control processing device in the cab 11 to the electrical equipment provided in the traveling body 3 via the control unit 31.

  According to the present embodiment, the anti-rotation member 21 can prevent foreign matter such as earth and sand flying from above the connector 30 from coming into contact with the connector 30. Further, the rotation preventing member 21 can prevent external force due to foreign matter from being applied to the connector 30. In other words, in this embodiment, the connector 30 connected to the slip ring 23 can be protected by the anti-rotation member 21 without requiring a dedicated cover member. As a result, the number of parts can be reduced, and the number of assembly steps can be reduced. These can reduce the production cost.

In the present embodiment, the connector 30 can be firmly fixed to the lower side of the rotation preventing member 21 via the bracket 32. Thereby, this embodiment can hold | maintain the connector 30 to the rotation prevention member 21 stably, and can implement | achieve a highly reliable wheel shovel.

  Further, in this embodiment, when the harness 31 that connects the slip ring 23 and the connector 30 is accidentally stepped on and a part of the harness 31 receives a pressing force, the inside of the notch 21b of the detent member 21 Enter. That is, according to the present embodiment, when the harness 31 is stepped on, the harness 31 can be released into the notch 21 b of the rotation preventing member 21. Thereby, damage, such as disconnection of the harness 23 when the harness 31 is stepped on, can be prevented, and a highly reliable wheel excavator can also be realized.

DESCRIPTION OF SYMBOLS 3 Traveling body 5 Revolving body 6 Working apparatus 10 Swing frame 20 Swivel joint 20a Housing 20b Spindle 20c Cover part 21 Non-rotating member 21a Extension part 21b Notch part 22 Stopper 23 Slip ring 24 Protection member 25 Harness (2nd harness)
30 connector 31 harness (first harness)
32 Bracket

Claims (3)

A traveling body, a revolving body disposed on the traveling body, a working device attached to the revolving body,
A housing fixed to the traveling body; and a spindle that is accommodated in the housing and rotates with the turning of the revolving body, and is disposed at a turning center of the revolving body, from the revolving body side to the traveling body side. A swivel joint that enables the supply of pressurized oil,
A swivel joint detent structure including a detent member disposed on the swivel body and attached to the spindle of the swivel joint;
A slip ring attached to the detent member of the swivel joint detent structure from above, a connector held by the detent member, a first harness connecting the slip ring and the connector,
In a working machine that is housed in the swivel joint and includes a second harness that connects the slip ring and an electric device disposed on the traveling body,
The connecting portion with the slip ring of the first harness is disposed on the upper side of the rotation preventing member,
A working machine, wherein the connector is disposed on a lower side of the detent member. The work machine according to claim 1,
A work machine, comprising a bracket for holding the connector and being fixed to the detent member. The work machine according to claim 1 or 2,
A working machine, wherein the rotation preventing member is provided with a notch portion into which a part of the first harness connecting the connector and the slip ring can enter.

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