JP6759999B2 - Swivel joint assembly tool for work machines - Google Patents

Description

The present invention relates to a swivel joint assembly tool used in a work machine having an upper swing body that is rotatable with respect to a lower traveling body, such as a mobile crane.

Conventionally, as a work machine, for example, a lower traveling body such as a mobile crane, an upper swinging body that can swing with respect to the lower traveling body, and a working device such as a crane device provided on the upper swinging body are provided. Is known.

In the work machine, for example, a hydraulic pump, a hot water pump, a compressor, etc. driven by the power of the engine are provided on the lower traveling body side, and the hydraulic oil discharged from the hydraulic pump, hot water discharged from the hot water pump, the compressor, etc. The discharged fluid such as air is supplied to the upper swing body side.

In the work machine, since the fluid circulates between the lower traveling body and the upper swivel body side, the fluid flow path on the lower traveling body side and the fluid flow path on the upper swivel body side are connected via a swivel joint ( For example, see Reference 1).

The swivel joint is an inner peripheral side that is rotatably inserted into an outer peripheral side member held by one of the lower traveling body and the upper rotating body and an outer peripheral side member held by the other of the lower traveling body and the upper rotating body. It has a member and. Since the swivel joint is provided with a large number of consumable parts such as a seal ring between the outer peripheral side member and the inner peripheral side member, it is necessary to replace the consumable parts, and the inner peripheral side member with respect to the outer peripheral side member Detachment work occurs.

Japanese Unexamined Patent Publication No. 2011-158044

The swivel joint is required to be miniaturized from the viewpoint of fitting the equipment constituting the work machine, and in order to improve the performance of the work equipment, parts are processed and assembled with high accuracy. Therefore, in the swivel joint, in the work of attaching / detaching the inner peripheral side member to the outer peripheral side member, the outer peripheral side member and the inner peripheral side member are likely to come into contact with each other, and the sliding surface of one or both of the outer peripheral side member and the inner peripheral side member. If it is damaged, it may cause fluid leakage.

An object of the present invention is for a work machine capable of preventing damage to the sliding surfaces of the outer peripheral side member and the inner peripheral side member and easily attaching and detaching the inner peripheral side member to the outer peripheral side member. The purpose is to provide a swivel joint assembly tool.

The present invention is a swivel joint assembly tool for work machines used when inserting an inner peripheral side member into a tubular outer peripheral side member in order to achieve the above object, and is detachably attached to the outer peripheral side member. A guide member that extends in the direction of inserting and removing the inner peripheral side member while being attached to the outer peripheral side member, and a guide member that is detachably attached to the inner peripheral side member and moves along the guide member while being engaged with the guide member. It is provided with a flexible engaging member.

As a result, the inner peripheral side member moves toward the outer peripheral side member without tilting the central axis of the inner peripheral side member with respect to the central axis of the outer peripheral side member. The inner peripheral side member is inserted into the inner peripheral side of the outer peripheral side member without contacting the outer peripheral surface of the side member.

According to the present invention, the inner peripheral side member can be inserted into the inner peripheral side of the outer peripheral side member without contacting the outer peripheral surface of the inner peripheral side member with the inner peripheral surface of the outer peripheral side member. It is possible to prevent damage to the sliding surface of each of the inner peripheral side members, and it is possible to easily attach / detach the inner peripheral side member to the outer peripheral side member.

It is a side sectional view of the swivel joint which shows one Embodiment of this invention. It is a bottom view of a swivel joint. It is the bottom view of the swivel joint which shows the state which removed the connecting plate. It is a side view of the swivel joint assembly tool. It is a figure which shows the assembly method of the swivel joint using the swivel joint assembly tool. It is a figure which shows the assembly method of the swivel joint using the swivel joint assembly tool. It is a figure which shows the assembly method of the swivel joint using the swivel joint assembly tool. It is a figure which shows the assembly method of the swivel joint using the swivel joint assembly tool.

1 to 8 show an embodiment of the present invention.

The swivel joint assembly tool 1 of the present invention is for assembling a swivel joint 10 mounted on a work machine having a crane device to an upper swing body that can swing with respect to a lower traveling body, for example, a mobile crane. is there.

As shown in FIG. 1, the swivel joint 10 is rotatably inserted into the outer cylinder 11 as a tubular outer peripheral side member held by the lower traveling body and the outer cylinder 11 and held by the upper swivel body. It includes an inner cylinder 12 as an outer peripheral side member, and a shaft 13 as an inner peripheral side member rotatably inserted into the inner cylinder 12 and connected to the outer cylinder 11.

The outer cylinder 11 is provided with a plurality of inner peripheral grooves 11a extending in the circumferential direction along the inner peripheral surface and arranged at intervals in the axial direction from each other, and the inner peripheral groove 11a and the outer surface of the inner cylinder 12 are provided with each other. A plurality of annular hydraulic oil channels are formed between them. The hydraulic oil flow path is a flow path through which the hydraulic oil supplied to the actuator that drives the crane device flows. The hydraulic oil discharged from the hydraulic pump driven by the power of the engine provided in the lower traveling body circulates between the lower traveling body and the upper turning body through the hydraulic oil flow path. Further, a seal ring 11b is provided between the inner peripheral grooves 11a on the inner peripheral surface of the outer cylinder 11 which are adjacent in the vertical direction to prevent the hydraulic oil from flowing out to the hydraulic oil flow path adjacent in the vertical direction. Has been done. Further, a plurality of connection ports to which the hydraulic oil flow pipe on the traveling body side is connected are provided on the outer peripheral portion of the outer cylinder 11.

The outer peripheral portion on the upper side of the inner cylinder 12 is located above the outer cylinder 11 in a state of being inserted into the outer cylinder 11. The inner cylinder 12 is provided with a plurality of inner peripheral grooves 12a extending in the circumferential direction along the inner peripheral surface and arranged at intervals in the axial direction from each other, and the inner peripheral groove 12a and the outer surface of the shaft 13 are provided with each other. A plurality of annular hot water channels are formed between them. The hot water flow path is a flow path through which hot water supplied to the heating device in the operation cab provided in the upper swing body flows. The hot water discharged from the hot water pump driven by the power of the engine provided in the lower traveling body circulates between the lower traveling body and the upper swivel body through the hot water flow path. Further, a seal ring 12b is provided between the inner peripheral grooves 11a adjacent to the inner peripheral surface of the inner cylinder 12 in the vertical direction to prevent hot water from flowing out to the hot water flow path adjacent in the vertical direction. There is. Further, on the outer peripheral portion on the upper side of the inner cylinder 12, a plurality of connection ports for connecting the hydraulic oil flow pipe, the hot water flow pipe, and the air flow pipe on the upper swivel side are provided. A slip ring 14 is provided on the upper surface of the inner cylinder.

The shaft 13 is provided with a plurality of outer peripheral grooves 13a extending in the circumferential direction along the outer peripheral surface and arranged at intervals in the axial direction from each other, and a plurality of outer peripheral grooves 13a are provided between the outer peripheral groove 13a and the inner surface of the inner cylinder 12. An annular air flow path is formed. The air flow path is a flow path through which the air supplied to the pneumatic actuator provided on the upper swing body side flows. The air discharged from the compressor driven by the power of the engine provided in the lower traveling body circulates between the lower traveling body and the upper rotating body through the air flow path. Further, a seal ring 13b is provided between the outer peripheral grooves adjacent in the vertical direction on the outer peripheral surface of the shaft 13 to prevent air from flowing out to the air flow path adjacent in the vertical direction. The shaft 13 is formed in a tubular shape, and the wiring for power supply and the wiring for signal transmission connected to the slip ring 14 are passed through the inner peripheral side. As shown in FIG. 2, the lower surface of the shaft 13 is provided with a plurality of connection ports 13c to which the hot water flow pipe and the air flow pipe on the lower traveling body side are connected.

The lower ends of the outer cylinder 11 and the shaft 13 are connected to each other by a connecting plate 15.

The connecting plate 15 is a plate-shaped member having substantially the same length dimension as the outer diameter dimension of the outer cylinder 11, and the central portion in the longitudinal direction is located at the center in the radial direction of the outer cylinder 11, the inner cylinder 12, and the shaft 13. However, both ends in the longitudinal direction are located on the outer peripheral side of the outer cylinder 11.

As shown in FIGS. 2 and 3, the central portion of the connecting plate 15 in the longitudinal direction is located in the groove 13d provided on the lower surface of the shaft 13, and a pair of female screw holes provided in the bottom of the groove 13d. It is fixed to the shaft 13 by screwing a bolt 13f into each of the 13e.

As shown in FIGS. 2 and 3, both ends of the connecting plate 15 in the longitudinal direction are located in the groove 11c provided on the lower surface of the outer cylinder 11, and the female screw provided on the bottom of the groove 11c. It is fixed to the outer cylinder 11 by screwing a bolt 11e into the hole 11d. Further, both ends of the connecting plate 15 in the longitudinal direction are pressed from below by the fall-out prevention plates 11f extending in the direction of passing the groove 11c of the outer cylinder 11. The fall-out prevention plate 11f is fixed to the outer cylinder 11 by screwing bolts 11h into female screw holes 11g provided on both outer sides of the groove 11c of the outer cylinder 11 in the width direction.

In the swivel joint 10, the work of attaching / detaching the shaft 13 to / from the inner cylinder 12 is required to replace consumable parts such as the seal ring.

As shown in FIG. 4, the swivel joint assembly tool 1 of the present invention includes a guide member 2 and a sub guide member 3, and an engaging member 4 that can engage with the guide member 2 and the sub guide member 3. There is.

The guide member 2 and the sub-guide member 3 are each made of a rod-shaped member, and male screw portions 2a and 3a are provided on one end side of the rod-shaped member. The guide member 2 and the sub guide member 3 are detachably attached to the outer cylinder 11 by screwing them into the female screw holes 11g of the outer cylinder 11, respectively. The guide member 2 and the sub guide member 3 extend in the direction in which the shaft 13 is inserted and removed while being attached to the outer cylinder 11, respectively.

The engaging member 4 is detachably attached to the shaft 13 and is movable along the guide member 2 and the sub-guide member 3 in a state of being engaged with the guide member 2 and the sub-guide member 3. Further, the engaging member 4 has a fixing portion 5 which is fixed to the lower surface of the shaft 13 and engages with the sub-guide member 3, and an engaging portion 6 which engages with the guide member 2.

The fixing portion 5 is a plate-shaped member having substantially the same width and thickness dimensions as the width and thickness dimensions of the connecting plate 15 of the swivel joint 10, and the engaging portion 6 is fixed to one end thereof. A pair of bolt insertion holes 5a are provided in the central portion of the fixing portion 5. The engaging member 4 is fixed to the shaft 13 by passing a bolt 13f through each of the pair of bolt insertion holes 5a and screwing the engaging member 4 into the female screw hole 13e. Further, on the other end side of the fixing portion 5, a sub guide member engaging hole 5b having an inner diameter dimension slightly larger than the outer diameter dimension of the sub guide member 3 is provided. The fixing portion 5 is guided along the sub-guide member 3 by inserting the sub-guide member 3 into the sub-guide member engaging hole 5b.

The engaging portion 6 is composed of a tubular member extending from one end of the fixing portion 5 in a direction orthogonal to the extending direction of the fixing portion 5. The engaging portion 6 is provided with a guide member engaging hole 6a having an inner diameter that is slightly larger than the outer diameter of the guide member 2. The engaging portion 6 is guided along the guide member 2 by inserting the guide member 2 into the guide member engaging hole 6a. The larger the axial dimension of the engaging portion 6, the more accurately the engaging portion 6 can move along the guide member 2.

The swivel joint assembly tool 1 configured as described above is used when attaching / detaching the shaft 13 to / from the outer cylinder 11 and the inner cylinder 12 in a state of being attached to the work machine. As shown in FIGS. 5 to 8, the shaft 13 is assembled to the outer cylinder 11 and the inner cylinder 12 by the swivel joint assembly tool 1. Here, when the shaft 13 is attached to the outer cylinder 11 and the inner cylinder 12, the bolt 11e, the fall prevention plate 11f, the bolt 11h, the bolt 13f, and the connecting plate 15 are removed.

First, as shown in FIG. 5, the operator screwes the male screw portions 2a and 3a of the guide member 2 and the sub guide member 3 into the female screw hole 11g of the outer cylinder 11 to guide the guide member 11 with respect to the outer cylinder 11. 2 and the sub guide member 3 are attached. Further, the operator arranges the engaging member 4 in the groove 13d of the shaft 13 and screwes the pair of bolts 13f into the female screw hole 13e of the shaft 13 to attach the engaging member 4 to the shaft 13.

Next, as shown in FIG. 6, the operator inserts the guide member 2 into the guide member engaging hole 6a provided in the engaging portion 6 while lifting the shaft 13, and also inserts the guide member 2 into the sub The sub-guide member 3 is inserted into the guide member engaging hole 5b, and the shaft 13 is moved upward.

As a result, as shown in FIG. 7, the shaft 13 moves along the guide member 2, so that the central axis does not tilt with respect to the central axes of the outer cylinder 11 and the inner cylinder 12, and the outer cylinder 11 and the inner cylinder 12 do not tilt. It is inserted in 12. Further, since the shaft 13 moves along the guide member 2 and the sub-guide member 3, the outer cylinder 11 and the inner cylinder 11 and the inner cylinder 13 are held in a radial position with respect to the outer cylinder 11 and the inner cylinder 12. It is inserted inside the cylinder 12.

Finally, the operator removes the guide member 2, the sub guide member 3, and the engaging member 4 as shown in FIG. 8 while holding the state in which the shaft 13 is inserted into the outer cylinder 11 and the inner cylinder 12. As shown in FIGS. 1 and 2, the outer cylinder 11 and the shaft 13 are connected by the connecting plate 15.

As described above, according to the swivel joint assembly tool for work machines of the present embodiment, the guide member 2 is detachably attached to the outer cylinder 11 and extends in the direction of inserting and removing the shaft 13 while being attached to the outer cylinder 11. The engaging member 4 is detachably attached to the shaft 13 and is movable along the guide member 2 in a state of being engaged with the guide member 2.

As a result, the shaft 13 can be inserted into the outer cylinder 11 and the inner cylinder 12 without contacting the outer peripheral surface of the shaft 13 with the inner peripheral surface of the inner cylinder 12, so that the inner cylinder 12 and the shaft 13 slide respectively. Damage to the surface can be prevented, and the shaft 13 can be easily attached to and detached from the outer cylinder 11 and the inner cylinder 12.

Further, the guide member 2 is made of a rod-shaped member, and the engaging member 4 is provided with a guide member engaging hole 6a through which the guide member 2 is inserted and engaged.

As a result, the engaging member 4 can be easily engaged with the guide member 2 by passing the rod-shaped guide member 2 through the guide member engaging hole 6a, and the work efficiency of the attachment / detachment work of the shaft 13 is improved. Is possible.

Further, the outer cylinder 11 is provided with a rod-shaped sub-guide member 3 that is detachably attached at a position and interval from which the guide member 2 is attached and extends in the direction of inserting and removing the shaft 13 while being attached to the outer cylinder 11. The engaging member 4 is provided with a sub-guide member engaging hole 5b through which the sub-guide member 3 is inserted and engaged.

As a result, the shaft 13 can be inserted into the outer cylinder 11 and the inner cylinder 12 while the radial position of the shaft 13 is held with respect to the outer cylinder 11 and the inner cylinder 12, so that the inner cylinder 12 can be inserted. It is possible to more reliably prevent contact between the inner peripheral surface and the outer peripheral surface of the shaft 13.

Further, one end side of each of the guide member 2 and the sub guide member 3 is formed in a male screw shape, and by screwing into the female screw hole 11 g provided in the outer cylinder 11, the guide member 2 and the sub guide are formed in the outer cylinder 11. The member 3 is attached.

As a result, the orientation of the central axis of the guide member 2 and the sub-guide member 3 can be fixed only by attaching the guide member 2 and the sub-guide member 3 to the outer cylinder 11, so that the outer cylinder 11 and the inner cylinder 12 can be fixed. It is possible to easily attach / detach the shaft 13 to the shaft 13.

Further, the engaging member 4 is attached to the shaft 13 by screwing a fastening bolt 13f into the female screw hole 13e provided on the shaft 13.

As a result, the engaging member 4 can be reliably fixed to the shaft 13, so that the radial position of the shaft 13 can be reliably positioned with respect to the inner cylinder 12.

Further, the female screw holes 11g and 13e to which the guide member 2, the sub guide member 3 and the engaging member 4 are attached are existing female screw holes having different uses used for attaching the connecting plate 15 in the outer cylinder 11 and the shaft 13, respectively. Is.

As a result, it is not necessary to form a dedicated female screw for attaching the guide member 2, the sub guide member 3, and the engaging member 4 to the outer cylinder 11 and the shaft 13, so that the manufacturing cost of the swivel joint 10 can be reduced. Is possible.

In the above embodiment, the three-layer swivel joint 10 having the outer cylinder 11, the inner cylinder 12, and the shaft 13 is shown, but the present invention is not limited to this, and the swivel joint having two layers having the outer cylinder and the shaft is not limited to this. However, the present invention can be applied. Also in this case, the guide member 2 and the sub guide member 3 may be detachably attached to the outer cylinder, and the engaging member 4 may be attached to the shaft.

Further, in the above embodiment, one guide member 2 and one sub-guide member 3 are attached to the outer cylinder 11, and the engaging portion 6 that engages with the guide member 2 and the sub-guide member 3 that engages with the sub-guide member 3 are attached to the shaft 13. Although the guide member engaging hole 5b is provided, the present invention is not limited to this. For example, the effect of the present invention can be obtained even if a plurality of guide members 2 are provided on the outer cylinder 11 and a plurality of engaging portions 6 that engage with each guide member 2 are provided on the shaft 13. Further, even if one guide member 2 is provided on the outer cylinder 11 and one engaging portion 6 is provided on the shaft 13 without providing the sub-guide member 3 and the sub-guide member engaging hole 5b, the above-described embodiment. Similarly, the shaft 13 can be inserted into the outer cylinder 11 and the inner cylinder 12 without the central shaft of the shaft 13 being tilted with respect to the central axes of the outer cylinder 11 and the inner cylinder 12. In this case, the cross-sectional shape of the rod-shaped guide member is a non-circular shape such as a quadrangular shape, and the cross-sectional shape of the hole provided in the engaging member is made to match the cross-sectional shape of the guide member. It is possible to hold the radial position of the shaft 13 with respect to the outer cylinder 11 and the inner cylinder 12.

Further, in the above-described embodiment, the rod-shaped guide member 2 is inserted into the guide member engaging hole 6a so that the engaging portion 6 is engaged with the guide member 2, but the present invention is limited to this. It's not a thing. Any engaging member that can move along the guide member while engaged with the guide member may be used, and a hook-shaped engagement member that can move along the guide member while engaged with the rail-shaped guide member. It may be a member.

1 ... Swivel joint assembly tool, 2 ... Guide member, 2a ... Male screw part, 3 ... Sub guide member, 3a ... Male screw part, 4 ... Engagement member, 5 ... Fixing part, 5b ... Sub guide member engagement hole, 6 ... Engagement part, 6a ... Guide member engagement hole, 10 ... Swivel joint, 11 ... Outer cylinder, 11f ... Fall prevention plate, 11g ... Female screw hole, 13 ... Shaft, 13e ... Female screw hole, 13f ... Bolt, 15 ... Connection plate.

Claims (6)

A swivel joint assembly tool for work machines used when inserting an inner peripheral side member into a tubular outer peripheral side member.
A guide member that is detachably attached to the outer peripheral side member and extends in the direction of inserting and removing the inner peripheral side member while being attached to the outer peripheral side member.
A swivel joint assembly tool for work machines, which is detachably attached to an inner peripheral side member and is movable along the guide member while being engaged with the guide member. The guide member consists of a rod-shaped member.
The swivel joint assembly tool for a work machine according to claim 1, wherein the engaging member is provided with an engaging hole through which a guide member is inserted and engaged. It is provided with a rod-shaped sub-guide member that is detachably attached at a position and interval at which the guide member on the outer peripheral side member is attached and extends in the direction of inserting and removing the inner peripheral side member while being attached to the outer peripheral side member.
The swivel joint assembly tool for a work machine according to claim 2, wherein the engaging member is provided with a sub-guide member engaging hole through which the sub-guide member is inserted and engaged. Claim that at least one end side of each of the guide member and the sub guide member is formed in a male screw shape, and the guide member and the sub guide member are attached to the outer peripheral side member by screwing into the female screw hole provided in the outer peripheral side member. The swivel joint assembly tool for work machines according to 3. The swivel joint assembly tool for a work machine according to claim 3, wherein the engaging member is attached to the inner peripheral side member by screwing a fastening bolt into a female screw hole provided in the inner peripheral side member. The female screw provided on the outer peripheral side member and the female screw provided on the inner peripheral side member are existing female threads used for different purposes in the outer peripheral side member and the inner peripheral side member, respectively. Swivel joint assembly tool for work machines.