JP3364741B2 - Device for facilitating fastening or loosening with screws - Google Patents

Description

Detailed Description of the Invention

[0001]

The present invention relates to a longitudinally threaded bolt, which can be actuated by a pressure medium via a conduit arrangement connectable to a pressure medium source, which can be mounted on a preferably annular carrier. Threaded connection comprising a threaded bolt and a nut screwable to the threaded bolt, in particular a threaded connection associated with a cylinder lid of a large engine The present invention relates to a device for facilitating fastening or loosening.

[0002]

2. Description of the Related Art A large engine such as a large two-stroke diesel engine has heretofore been equipped with a solidly built-in carrier incorporating the above-described method and a fixedly arranged extension unit. Was associated with each cylinder head.

[0003]

Here, a cylinder is used.
High costs are incurred because a device for introducing the above-mentioned method is required for each head. A method adapted to the robust build-in concept of known devices also results in a very unwieldy arrangement with poor proximity to the cylinder lid, which results in areas of the cylinder lid such as exhaust passages. It is difficult to maintain and repair the device provided inside and the extension unit. Based on the fixed arrangement of the stretcher unit, it is necessary to form the supply conduit associated with the stretcher unit as a hole on the carrier side,
This hole makes fabrication difficult. The known arrangement is therefore
It is clear that it is not cost-effective and easy to maintain.

From here, a simple and cost-effective means is provided which not only keeps the construction cost relatively low, but also guarantees easy operation and maintenance and leaves the structure around the screw connection. There arises a problem that the above-mentioned method is used to improve the apparatus.

[0005]

SUMMARY OF THE INVENTION The present invention is a suspension for a crane.
An annular carrier that can be lowered and attached to the carrier
Suspended by spring traction mechanism and spring traction mechanism so that it can be moved up and down
Lower the extender unit and project downward from the ring carrier.
A standing leg that is formed by being exposed and comes into contact with the cylinder lid during use.
And the stretcher unit is to be fastened or loosened
The bolt of the bolt-nut connection that becomes
And a cylinder for extending the bolt in its longitudinal direction-
With piston mechanism, connected to pressure medium source and extended
Can be connected to the cylinder-piston mechanism of the tool unit
Connecting conduit, including a flexible pipe
Swivel version installed between the knit and the spring traction mechanism
On the cylinder lid of a large engine that has
A bolt-nut connection fastening and loosening device
Solve the problem.

[0006] This arrangement produces a movable device which can be moved in an efficient manner, for example in the case of lifting cylinder machines, from cylinder lid to cylinder lid or even withdrawal completely. This requires only one device according to the invention for all cylinder lids. Since the device can be completely retracted, the proximity to the device in the region of the cylinder lid, for example the exhaust exhaust passage in the region of the cylinder lid in a two-stroke diesel engine, is also not disturbed. The extender unit is incorporated in the spring traction that functions as a mass balancer so that it can be easily lowered or raised. This also ensures a high degree of good serviceability, in case the carrier has to be held far away from the linder lid due to the superstructure in the area of the cylinder lid. The movable coupling conduit associated with the stretcher unit allows easy up and down movement of the stretcher unit. The carrier-side connection holes for feeding the extender unit are here dispensed with in an effective manner. The broader and quite special effect of the arrangement according to the invention lies in the fact that the freely suspended extender unit can be easily replaced, which facilitates its maintenance and service. Thus, the technical disadvantages of the first-mentioned application of the concept of this genus are completely eliminated with the arrangement according to the invention and the overall efficiency of the display is guaranteed.

Advantageous developments and suitable refinements of the arrangement here are set forth in the appended claims. Thus, the carrier may suitably be provided with downwardly extending standing legs. This stance, the device according to the invention allows for simple installation onto a sheet Linder lid other of interest.

[0008] Yet another suitable arrangement is for one annular carrier.
It may be in the provision of a carrier band annulus with an annulus. This allows a simple mounting on the hook of a crane such as is actually available in the engine room of a ship or power plant.

In a further refinement of the advantageous arrangement, the annular carrier can comprise two parts which are connected to one another via a spring traction housing, in which case the upper part is fitted with a carrier band and the lower part is attached. The side portion is penetrated by the spring traction roller and is provided with a standing leg. This arrangement advantageously incorporates a spring traction housing in the annular carrier structure, leading to a correspondingly simple and compact construction. Due to the shape of the upper and lower parts of the annular carrier, two floors are advantageously created simultaneously in an advantageous manner, which provides a large number of places for an overlooking arrangement of all the necessary equipment.

A further improvement to the excellent arrangement is that the stubs located in the area between the spring tractions are provided in the lower part of the annular carrier, above which stubs a support element for supporting the stretcher unit is required. It exists in what is put in the case of not being said. This guarantees a reliable accident-prevention storage of the support element on the ring carrier so that good serviceability can be effectively felt and it can be hand-held when needed.

The lower part of the annular carrier may also conveniently carry a camouflage nipple associated with the coupling conduit. Each associated mating conduit end removed from the associated stretcher unit may be secured to the camouflage nipple. This ensures that the connecting conduit removed from the associated stretcher unit does not sag freely, thereby avoiding disaster risk and damage risk. At the same time, it is possible that this camouflage nipple is arranged to generate a conduit closure, so that a separate confinement element can be dispensed with.

[0012]

1 shows a cylinder lid 1 of a lifting and lowering cylinder machine which may be associated with a large two-stroke diesel engine. The cylinder lid 1 has a corresponding built-in exhaust gas discharge passage 2. Cylinder lid 1
Is held by a screw bolt 3 which penetrates this lid and is fixed to the cylinder side, and a nut 4 into which this bolt can be screwed.

The device according to the invention, which is installed on the cylinder lid 1 in FIG. 1, facilitates the fastening or loosening of the nut 4 and its assembly or disassembly. The device according to the invention uses a carrier ring with one ring 7,
In addition, it has an annular carrier 5 corresponding to the circular outline of the cylinder lid 1, which can be hung on a crane hook in the absence of a nearby prepared hoist, for example a workplace hoist available in the machine room. The annular carrier 5 carries an extender unit 9 associated with the threaded bolt 3. Stretcher unit 9
With the help of, the screw bolts 3 associated with each can be extended, which facilitates the tightening or loosening of the nut 4. Corresponding to the screw bolt arrangement on the pitch circle, a stretcher unit 9 on the pitch circle with the same diameter and the same pitch is also arranged.

With the help of the above-mentioned crane, the device according to the invention can be lifted, moved and lowered. This allows the device of the present invention to be moved from the cylinder lid of the lifting cylinder machine at hand to another cylinder lid, or moved from warehouse to warehouse and stored when not needed. . As can be seen from FIG. 1, the annular carrier is positioned separately on the cylinder lid when inserted so that it does not cause a collision with the exhaust gas exhaust passage 2 or the like. For this, the annular carrier is provided with a standing leg 10 extending downwards, which can be mounted on the cylinder lid 1.

The extender unit 9 is suspended from an annular carrier 5 which may be located a distance above the cylinder lid 1. In order to facilitate the operation of the stretcher unit 9, the stretcher unit 9 is suspended in the tow rollers 11 of the respective spring tractors 12 built into the annular carrier 5. The spring tractions 12 are mass-balanced so that their respective stretcher units 9 can be raised or lowered without consuming as much energy as is worth mentioning. The structure and operation of spring traction are well known.
The spring tractions 12 used here each comprise a drum housing 13, which has two support latches 14 which are arranged in opposition to one another in diameter. Fixed to this support latch are mutually spaced rings 15 to 16 which form the upper or lower part of the annular carrier 5, which rings are provided with connecting forks 17 associated with the support latch 14. There is. The drum housing 13 of the spring traction 12 thus acts as a separator between the rings 15, 16 forming two assembly decks parallel to the cylinder lid and spaced apart from each other.

The rings 15, 16 are annular in the illustrated embodiment. However, polygonal arrangements are also conceivable.

Relating drum housing against spring force
The traction roller 11 of the spring traction 12 that can extend from 12 or can be retracted into the drum housing by spring force is
A lower ring 16 associated therewith passes through a guide hole in it and at its free end a transport element, here a spring safety hook 18
However, this spring safety hook can be brought into contact with a carrying element, here a carrying hanger 19, which is fixed to the associated stretcher unit 9. The standing leg 10 is fixed to the lower ring 16. The carrier band 6 is fixed to the upper ring 15.

The extension unit 9 is a hydraulic cylinder-piston unit which can be acted upon by a pressurized fluid. An upper ring for supplying pressurized fluid to the stretcher unit 9.
On top of 15, there is arranged an annular conduit 20 which can be connected here to a source of pressure medium not shown here, eg a hydraulic pump, from which the connecting conduit 21 relating to the individual stretcher unit 9 emerges. There is. The coupling conduit 21 is formed of a flexible pipe, and the flexible pipe causes the stretcher unit 9 associated therewith to perform an ascending / descending operation. The annular conduit 20 has a connecting end head 22 associated with each coupling conduit. These connecting end heads are connected to each other by a short connecting pipe unit 23. This splice tube unit can also be formed as a plexipipe segment.

In the illustrated embodiment, each extender unit 9
Is associated with each associated coupling conduit 21. Obviously, each stretcher unit may be of a multi-unit configuration, which may be adapted to withdraw a plurality of coupling conduits 21 belonging to its own stretcher unit from the collective connection end head.
Similarly, instead of the illustrated annular conduit 20 with the connecting end heads 22 associated with individual stretcher units 9 or connecting conduits 21, one large connecting end head 22 associated with all connecting conduits 21, or at least It would be conceivable to provide a number of connecting end heads, each associated with a plurality of, preferably adjacent stretcher units 9 or their connecting conduits 21.

The connecting end head 22 is preferably formed as a box or a cubic block, here a lateral connecting nipple for the circumferentially extending connecting tube unit 23 and an upward connection for the respective associated connecting conduit 21. A nipple 24 is provided. As long as there are a large number of connecting conduits 21 per connecting head, a corresponding number of associated connecting nipples is provided in a self-evident manner. On the contrary, this is also effective when the annular conduit 20 is omitted. In such a structure, the connecting nipple corresponding to the annular conduit 20 is omitted.

The extender unit 9 is also provided with a corresponding connecting nipple 24. Coupling conduit 21 and connecting pipe unit
23 is a connection socket that can be mounted on the connection nipple 24
Equipped with 26. One of the connecting end heads also has a suitable connecting socket and leads to a supply conduit to the pressure medium source.
It has a front protruding nipple for 25. Mounting suitability for nipples associated with coupling conduit 25 may be provided for all connecting end heads 22. In the supply conduit 25, a regulating valve for regulating or pressure on / off switching, which is not shown here nearby, can be provided.

Unless the device of the present invention is in the applied state, the coupling conduit 21 can be decoupled from its associated stretcher unit. In order to prevent the free end of the uncoupled coupling conduit 21 from hanging freely, the lower ring 16 is provided with a coupling conduit-related camouflage nipple 27, which the coupling conduit 21 has its free connection above. The socket 26 can be fixed. The coupling conduit, which is fastened with its front connection socket 26 on the disguised nipple 27, is shown in FIG. 1 at 21 '. The shape of the camouflaged nipple 27 matches the shape of the connecting nipple 24. Moreover, the camouflage nipple 27 can be closed so that the sealing of the plugged-in coupling conduit 21 occurs automatically. It would also be conceivable to provide a blocking element associated with the coupling conduit 21, for example within the connection head 22.

The extender unit 9, constructed as a hydraulic cylinder-piston unit, is best understood from FIG. 2 by the two substructures of the surge chamber 28, namely the axial engagement with one another. Rotating parts 9a, 9 capable of relative movement
b. The so-called surge chamber 28 is capable of exerting a pressure fluid on a hole 29 leading to an associated connecting nipple provided in the upper rotating part 9b. The axial movement of the two rotating parts 9a, 9b on the opposite side ensures that the lower rotating part 9a does not slide down due to the action of gravity from the rotating part 9b that is suspended from above using the transport hanger 19. It is constrained by a stopper 30 formed as a bolt. During operation, the extender units 9 are lowered onto their respective screw bolts 3 and brought into screw contact with the nuts 4 of the screw bolts 3 on the trip. In this connection, the upper rotating part 9b has a central threaded hole 31, which corresponds to the threaded hole of the nut 4, by means of which the stretcher unit 9 can be screwed onto the associated threaded bolt 3. . To make this possible, the transport hanger 19 is equipped with a swivel joint 32.

The extension unit 9 brought into contact with the screw bolt 3 is located at a bushing-shaped support element, namely the distance piece 33, surrounding the nut 4 in which the lower rotary part 9a has been previously brought in place. It is screwed in until it is placed. This kind of distance piece 33
The extender unit supported on is shown in FIG. 1 at 9 '. The lower rotating part 9a comprises a downwardly projecting shoulder seat 34, which can be engaged in a bushing-shaped distance piece 33, as better seen in FIG. This centers the distance piece. The extension unit 9 screwed in this way is supported on the distance piece of the cylinder lid 1.

When not in use, the distance piece 33 is loaded onto the annular carrier 5, as shown at 33 'in FIG. In order to allow a smooth loading of the bushing-shaped distance piece 33 onto the annular carrier 5, the lower ring 16 is provided with stubs 35 projecting upwards and associated therewith. The distance piece may be fixed. When necessary, the distance piece 33 is simply removed by hand, as shown in FIG.
It is mounted on the cylinder lid in the same way as described in.
However, it would also be possible to secure the distance pieces to their respective associated extension unit, i.e. to its lower rotating part 9a.

The distance piece 33 has a circumferential cut 36. The nut 4 has a circumferential hole 37. As can be seen in FIG. 2, insertable pins 38 can be inserted into these holes through the notches 36 so that the associated nut 4 can be turned. To facilitate this, the screw bolt 3 is biased by the pressure fluid impact of the stretcher unit 9 as described above.

Upon retraction of the nut 4, the nut 4 rests on the associated elongated threaded bolt 3 on the cylinder lid 1.
It must be screwed in until it is placed at. The bias removal of the screw bolt 3 produces the desired expansion force acting on the nut 4. When the nut 4 is loosened, the tensile force acting on the nut by the corresponding bias of the screw bolt 3 is increased so that the nut 4 can be easily unwound. With the help of the pins 38, this does not provide practically worth the power.

The above is a description of a preferred embodiment of the invention. The present invention is not limited to the one shown in the above embodiment.

[0029]

The annular carrier is formed of loose structural elements that can be operated by a crane to allow positioning away from the screw connection, and the extender unit is raised on each associated spring traction. The device is cheaper by being hung on an annular carrier that allows it to descend and being able to connect to the coupling conduit of the conduit device in a movable connection configuration,
In addition, it has the effect of facilitating maintenance and inspection of large cylinder machines by allowing easy removal when not in use.

[Brief description of drawings]

1 is a drawing of the device according to the invention in a position installed on the cylinder lid of a lifting and lowering cylinder machine, FIG.

2 is a cross-sectional view of a separate stretcher unit of the apparatus conforming to FIG. 1 illustrated with associated screw connections.

[Explanation of symbols]

1 cylinder lid 3 screw bolts 4 nuts 5 ring carrier 6 conveyor belt 7 1 ring 9 Stretcher unit 10 Standing 11 Towing roller 12 Spring traction 13 drum housing 15 ring (upper side) 16 ring (lower side) 21 coupling conduit 22 Connection end head 23 Connection tube unit 24 Connection nipple that goes up 25 supply conduit 27 camouflaged nipple 33 Support elements 35 stumps

─────────────────────────────────────────────────── ─── Continuation of the front page (56) Reference JP-A-54-45898 (JP, A) JP-A-60-180777 (JP, A) JP-A-3-234431 (JP, A) JP-A-5- 84672 (JP, A) Actual Kaihei 1-148226 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB name) B25B 21/00 B23P 19/06

Claims (9)

(57) [Claims] 1. An annular carrier that is suspended from a crane.
A spring traction mechanism attached to the carrier,
An extension tool that can be lifted and lowered by a spring traction mechanism
Unit and formed by projecting downward from the annular carrier
And have a standing leg that comes into contact with the cylinder lid during use.
The stretcher unit is subject to tightening or loosening
Screw part into which a bolt of a bolt-nut connection can be screwed
And a cylinder-pis that extends the bolt in its longitudinal direction.
Ton mechanism and connected to a pressure medium source and said extension
Can be connected to the cylinder-piston mechanism of the tool unit
Connecting conduit including a flexible pipe and the extension
Switch provided between the tool unit and the spring traction mechanism.
Large engine cylinder with bell joint
-A fastening and loosening device for the bolt-nut connection in the lid. Wherein characterized in that the conveying platform of the annular is provided with a conveyor belt ring comes with 1 ring, fastening and loosening device according to claim 1. 3. A becomes a two part carrier table of the annular is coupled to each other via the housing of the towing ne if the said conveyor belt ring contacts the upper part of the two parts characterized in that the lower part of the two parts is a the stance in a configuration that allows the penetration of the traction rollers of the spring traction, fastening and loosening, as described in the claim 1 or 2 <br / > Equipment. 4. An annular carrier provided on the annular carrier.
A conduit and the annular conduit inserted and associated with the coupling conduit
Is connected to the connection end head and the pressure medium source is connected.
A connecting tube unit having a connecting end head
The invention according to any one of claims 1 to 3 , characterized in that
The fastening and loosening device described in the slip . 5. The connecting end head comprises connecting nipples arranged opposite one another for the connecting pipe unit, at least one connecting nipple for connecting pipes arranged transversely to the connecting pipe unit, and Fastening according to claim 4 , characterized in that it is formed in a box-shaped or cubic block with connecting nipples for supply conduits, if necessary arranged transversely to the connecting nipples for the connecting conduits. Relaxation device. 6. Associated with each of the stretcher units
Support elements provided et al is Te, the supporting element be associated therewith respectively
That said been mountable surrounds the nut will be, formed by allowing carry on the annular transport stand during removal this
The fastening and loosening device according to any one of claims 1 to 5 , wherein: 7. A conveyor under the base portion of the annular, wherein is it possible to fix by putting the support element, and characterized in that it comprises a projecting stump upward,
The fastening and loosening device according to claim 6 . 8. The extension conduit unit side of the coupling conduit
End of which it is detachably composed該伸Chogu unit, before Symbol
Transportable Okudai is disposed conveying under the base side fraction, and characterized in that it comprises the <br/> pseudo instrumentation nipple attachable to the edge of the coupling conduits associated, claim 1 The fastening and loosening device described in any one of 1 to 7 . 9. At least one binding conduit, characterized by comprising associated with each of said stretcher <br/> unit, fastening as claimed in any one of the claims 1 to 8
Relaxation device.