DE1172619B - Tool with assembly mandrel for screwing a thin-walled hose nipple made of relatively soft material into a hose nozzle that already encompasses the hose end - Google Patents

Description

FEDERAL REPUBLIC OF GERMANY

GERMAN

PATENT OFFICE

EDITORIAL

Boarding school Class: B 25 b

Number:
File number: Filing date:
Display day:

German class: 87 a-22

1172 619
N17867Ic / 87a
February 10, 1960
June 18, 1964

There is already a tool for attaching hose screw connections known, which consists of a Hose socket and a nipple provided with a union nut, the clear diameter of which is equal to the inner tube diameter and which has a sealing cone. This tool is with a mandrel that fits into the nipple and protrudes beyond it, as well as one on the sealing cone of the nipple matching friction surface, which is attached to the sealing cone by means of the union nut is pressed. The use of this tool assumes that before screwing in the nipple into the hose socket of the nipple already attached to the hose end by means of the also after Completion of the assembly of the valve on this remaining union nut on the mandrel so tightly has been screwed on that the pressure between the sealing surface on the tool and the nipple sealing cone is greater than the force required to screw the nipple into the hose socket must be expended. The power transmission from the handle of the tool to the one to be screwed in Nipples are only made by friction.

In the case of high-pressure hoses provided with a wire mesh intermediate layer, relatively large forces are involved necessary for screwing the nipple into the hose socket already attached to the hose end. But not only this fact makes the creation of a new assembly tool for hose screw connections necessary, but also the further fact that what is described at the beginning is known The tool cannot be used with fittings that open before screwing in the nipple this applied union nut is missing. In particular if the hose nipple consists of a relatively soft material, e.g. B. made of brass, which is used to prevent corrosion, needs an assembly tool and a nipple shape with which relatively large rotational forces are to be transmitted.

The invention relates to a thin-walled hose nipple made of relatively soft material, e.g. B. made of brass, for high pressure hoses provided with a wire mesh intermediate layer. In known tools of this type, the assembly mandrel which projects completely through the hose nipple is fitted into the nipple bore and provided with recesses into which internal projections of the nipple engage during the screwing-in process. In a known embodiment, these inner projections are designed as lugs projecting relatively far inward. These studs are expensive to manufacture; They also have a relatively large additional through tool with an assembly mandrel for screwing in
a thin-walled hose nipple from relatively
soft material into a hose nozzle that already encompasses the end of the hose

Applicant:

New Argus Society m. B. H.,

Ettlingen (Bad.), Goethestr. 15th

Named as inventor:

Rudolf Kaiser, Ettlingen (Bad.)

flow resistance result. When screwing the nipple into the end of the hose to which the Hose socket has already been applied, break off or be severely deformed.

The invention is based on the object of avoiding these disadvantages. It is characterized by that the entire outer circumference of the assembly mandrel evenly with the same axial serration is equipped, which also has the inner wall of the hose nipple over its entire length and the projections of the symmetrically formed serrations of both parts exactly into the Recesses of these serrations are fitted. By screwing in under the and high-pressure hoses, the relatively thin wall of the usual pretension Screw nipple firmly to the assembly mandrel. The production of the serration on the inner circumference the nipple is very cheap. It is produced in a single clearing operation. Through this Serration also creates no additional flow resistance. The holes of the screw nipples can be made practically exactly with the same diameter as the associated one Hose. So there is practically no cross-sectional constriction or an additional turbulent one Flow on.

Since in the tool designed according to the invention, the assembly mandrel can only be moved with great effort The assembly mandrel can be pulled out of the nipple screwed into the hose socket connected to a screw body and this in a designed as a screw nut with Handles equipped housing part out to which a no internal thread, sleeve-shaped Housing part that connects to the

409 600/31

Screw body facing upper end of the assembly mandrel includes and its end face both when screwing in the nipple and when pulling the assembly mandrel out of the nipple supported on the head of the latter.

The axial movement of the screw body is within the housing surrounding it in the manner limited that its end face facing the assembly mandrel in the furthest extended position this dome on an inner shoulder of the housing and that the face of its other end when screwing in the nipple against a perpendicular to the screw body axis in a bore of the as Screw nut trained housing part is supported pull-out mounted bolt. Based on these Support is provided by the screw body firmly connected to the assembly mandrel when it is rotated surrounding housing taken. Only when the support bolt is out of its bearing bore in the housing part, which is designed as a screw nut, has been pulled out as it is turned the tool handles pulled the assembly mandrel out of the assembled hose nipple. The furthest The extended position of the support bolt is limited by a stop on the screw nut handle, on which the support bolt is mounted by means of a cross piece fastened at its end.

In the F i g. 1 to 6 is an embodiment in different work positions illustrated.

F i g. 1 shows a longitudinal section of a hose end applied hose holder clamped in clamping jaws; in

Fig. 2 is - partially in longitudinal section - the Tool designed according to the invention is shown, on the mandrel of which is to be screwed into the hose socket Hose nipple is applied;

3 shows the position of the tool after the hose nipple has been screwed in; in

F i g. 4 illustrates how the assembly mandrel is withdrawn from the assembled hose nipple will; the end

Fig. 5 shows the position of the assembly mandrel, in which the support bolt of the screw body is completely relieved from the bore of the as Screw nut formed housing part can be pulled out;

Fig. 6 shows a plan view of the assembled hose screw connection in the axial direction.

The hose socket 1 is equipped with a connection head V , on the coupling parts for the hose line, so z. B. a union nut, not shown, can be attached. The hose holder 1 attached to a hose end 3 is clamped in clamping jaws 4. The nipple 2 to be screwed into the socket 1 and the hose end 3 is equipped with a nipple head 2 'and with an axial serration 2 in its bore. The assembly mandrel 5 has the same serration on its outer circumference. The mandrel 5 fits exactly without play in the serrated bore of the nipple 2, so that when the nipple is screwed in by means of the dome 5, very large forces can be transmitted even if the nipple is made of relatively soft material.

The mounting dome 5 is screwed to the screw body 2 and this screw connection through the coaxial screw 13 arranged for both parts secured. The housing part designed as a screw nut 7 is equipped with handles 8 and 9 and screwed onto the screw body 12. The one from the assembly mandrel 5 facing away end face 12 'of the latter is supported when the nipple 2 is screwed into the Hose socket 1 on the bolt 10, which is mounted in the bore 7 'of the housing part 7 so that it can be pulled out is. The support bolt 10 is mounted by means of a cross piece 11 fastened at one end the handle 9 of the nut 7 mounted and its furthest extended position by one on the aforementioned handle attached stop 9 'limited. Like F i g. 4 shows is the latter Stop attached in such a way that the bolt 10 is not completely pulled out of its bearing bore 7 ' can be.

With the housing part 7, the sleeve-like housing part 6 is screwed, which in the in 2, 3 and 5 illustrated working positions the screw body 12 facing upper The end of the assembly mandrel 5 and its end face 6 'both when screwing in the nipple 2 into the hose socket 1 as well as when pulling the assembly mandrel 5 out of the assembled one Nipple 2 on the head 2 'of the latter is supported.

In the in F i g. 5, the end face 12 ″ of the screw body 12 facing the assembly mandrel 5 is supported on an inner shoulder of the housing part 6. In this position, the support bolt 10 can be withdrawn unloaded from the bore T of the screw nut 7 up to the stop 9 ' When the bolt 10 is pulled out, the screw body 12 can emerge from the housing part designed as a screw nut when the latter is turned in the same direction of rotation and in this way pull the assembly mandrel 5 out of the mounted nipple 2.

The above therefore show that when the nipple 2 is screwed in and when it is pulled out of the serrated assembly dome 5 from the nipple the nut 7 always in the same direction is to be rotated by means of the handles 8 and 9. When pulling out is only for the screw body 12 to clear the way by pushing back the support bolt 10.

Claims (4)

Patent claims: 1. Tool with assembly dome for screwing in a thin-walled hose nipple from relative soft material, e.g. B. made of brass, for high pressure hoses provided with a wire mesh intermediate layer into a hose nozzle that already encompasses the end of the hose, with the hose nipple completely protruding assembly dome fitted into the nipple bore and he with recesses is provided, in which internal projections of the nipple engage during the screwing-in process, characterized in that that the entire outer circumference of the assembly mandrel (5) evenly with the same axial Serration is equipped, which also the inner wall of the hose nipple (2) on its entire Has length and the projections of the symmetrically formed serrations both parts (2, 5) are fitted exactly into the recesses of these serrations. 2. Tool according to claim 1, characterized in that the mounting dome (5) with a Screw body (12) connected and this in a designed as a screw nut with Handles (8, 9) equipped housing part (7) is guided, on which there is no internal thread having, sleeve-shaped housing part (6) connects, which the screw body (12) facing includes the upper end of the assembly mandrel (5) and its end face (6 ') both at Screwing in the nipple (2) as well as when pulling the assembly mandrel (5) out of the ι ο Supports nipple (2) on the head (2 ') of the latter. 3. Tool according to claim 1 and 2, characterized in that the axial movement of the The screw body (12) is limited within the housing (6, 7) surrounding it in such a way that that its end face (12 ") facing the assembly mandrel (5) is in the furthest extended position this dome (5) on an inner shoulder of the housing (6) and that the end face (12 ') its other end when screwing in the nipple (2) against a perpendicular to the screw body axis can be pulled out in a bore (7 ') of the housing part (7) designed as a screw nut supported bolt (10). 4. Tool according to claim 3, characterized in that from its bearing bore (7 ') pull-out support bolt (10) for the screw body (12) by means of one at its one End of attached cross piece (11) mounted on a handle (9) of the nut (7) and its furthest extended position by a stop attached to the aforementioned handle (9 ') is limited. Considered publications:
German patent specification No. 925 460. 1 sheet of drawings 409 600/31 6.64 © Bundesdruckerei Berlin