DE102017008428A1 - Turning device and method for screwing a threaded sleeve into a bore - Google Patents

Abstract

The present invention relates to a screwing device (2) for screwing in a threaded sleeve (64), which has a self - tapping external thread (70) and an internal thread (68), into a bore (86) with a rotatable shaft (8), which in a first In the longitudinal direction (10) into the threaded sleeve (64) is insertable, wherein at least one movable holding part (48; 50) on the shaft (8) is provided, which is movable from a release position radially outwardly into a holding position in which the threaded sleeve ( 64) in the first longitudinal direction (10) via the holding part (48; 50) on the shaft (8) supported or supported and / or in the circumferential direction (14, 16) of the shaft (8) via the holding part (48; the shaft (8) is rotatably coupled or torque coupled. Moreover, the present invention relates to a use of the screwing device (2) and a method for screwing a threaded sleeve (64).

Description

The present invention relates to a screwing device for screwing a threaded sleeve, which has a self-tapping external thread and an internal thread, into a bore with a rotatable shaft which can be inserted into the threaded sleeve in a first longitudinal direction. Moreover, the present invention relates to a method for screwing in such a threaded sleeve.

Components are known from the prior art, having holes with an internal thread to allow a screw connection between this component and another component. If the former component consists of a relatively soft and less solid material, such as plastic, it has been found that the internal thread of the bore has a relatively low load capacity. To solve this problem, it has gone over to insert threaded inserts made of stronger and / or harder material in the bore of the component, these threaded inserts usually an external thread for attachment to the component and an internal thread for making the connection with a screw or Have similar. In the case of the thread inserts, a distinction is made between wire thread inserts which have been produced by helically winding a wire, and threaded sleeves which have a substantially closed basic body in the form of a pipe or sleeve body, and thus are not formed by a helically wound wire.

In order to be able to simply screw the said threaded sleeves into the bore within the component, screwing devices have been developed, which essentially have a rotatable shaft. So Eindrehvorrichtungen are known which have a threaded shaft, ie a shaft with an external thread, wherein the shaft is first screwed into the threaded sleeve in such a way that the external thread of the shank engages in the internal thread of the threaded sleeve. The screwing of the shaft into the threaded sleeve is carried out until the threaded sleeve abuts against a stop of the driving device. Subsequently, the shaft can be lifted together with the turned-threaded sleeve by the driving device and guided to the bore in the component to be processed. Thanks to the engaging in the internal thread of the threaded sleeve external thread of the shank a captive arrangement of the threaded sleeve is ensured on the shaft. Subsequently, the shaft is rotated while inserting it into the bore within the component, so that the self-tapping external thread of the threaded sleeve digs into the wall of the bore. If the threaded sleeve is completely screwed into the bore, the shaft is turned out in the reverse direction of rotation again from the threaded sleeve, which remains within the bore. However, such a Eindrehvorrichtung or its underlying method has the disadvantage that the shaft always first screwed into the threaded sleeve and then must be unscrewed again, which makes the production of the component with threaded sleeve tedious. In addition, it has been found that the engaging in the internal thread of the threaded sleeve external thread is clamped after screwing the threaded sleeve into the bore relatively strong with the internal thread of the threaded sleeve. The same applies to that end portion of the threaded sleeve, which is supported on the stop of the Eindrehvorrichtung. Both have the consequence that unscrewing the shaft from the threaded sleeve sometimes causes due to the friction between the shaft or the stop on the one hand and the threaded sleeve on the other hand, the threaded sleeve itself is rotated out of the bore, which makes the production difficult and prone to error ,

In order to solve at least one of the above-mentioned problems, therefore Eindrehvorrichtungen were developed, the shaft has no external thread, which would have to be screwed into the internal thread of the threaded sleeve. Thus, the shaft of this Eindrehvorrichtung be introduced without relative rotation to the threaded sleeve in the longitudinal direction in the threaded sleeve. In order to still achieve a rotary driving connection between the shaft and the threaded sleeve for further processing or screwing the threaded sleeve into the bore, the known shaft has a hexagonal cross section, wherein the corners of this cross section after insertion into the threaded sleeve into corresponding recesses extend within the internal thread, so as to achieve a rotational drive coupling between the shaft and threaded sleeve. Sometimes also threaded sleeves are used, which have an input-side hexagonal opening into which engages the correspondingly shaped shaft when inserted into the threaded sleeve in order to achieve said rotational locking coupling. Although the known Eindrehvorrichtung with the cross-section hexagonal shaft makes screwing and unscrewing the shaft in or out of the threaded sleeve unnecessary, but said recesses must be provided in the internal thread of the threaded sleeve or the input-side hexagonal opening in order to achieve the rotational drive coupling can whereby the production of threaded sleeves is difficult. Moreover, the handling of the threaded sleeve is complicated by the Eindrehvorrichtung, especially since raising the threaded sleeve by means of the driving device and for the purpose of transfer to the bore due to the lack of external thread on the shaft is not possible is. Rather, the threaded sleeve has to be attached to the opening of the bore, the shaft is introduced into the threaded sleeve to achieve the rotary driving coupling, and the shaft is subsequently turned directly in order to screw the threaded sleeve into the bore.

It is therefore an object of the present invention to provide a driving device for screwing a threaded sleeve, which allows a simple, fast and safe processing of the threaded sleeve, without the threaded sleeve should be specially adapted to the Eindrehvorrichtung or should be. In addition, the present invention has for its object to provide a use or a method that allows a simple, fast and secure processing of the threaded sleeve.

This object is achieved by the in the claims 1 . 9 respectively. 10 specified characteristics solved. Advantageous embodiments of the invention are the subject of the dependent claims.

The insertion device according to the invention serves for screwing in a threaded sleeve which has a self-tapping external thread and an internal thread. Thus, the Eindrehvorrichtung is designed for a threaded sleeve having in contrast to a wire thread insert a substantially closed tube or sleeve body, although the Eindrehvorrichtung would basically be used for wire thread inserts. Thus, the screwing device has a rotatable shaft which extends in opposite longitudinal directions, which are referred to below as the first longitudinal direction and second longitudinal direction. The shaft can be inserted in the first longitudinal direction in the threaded sleeve to be processed. For rotation of the shaft, the screwing device may further comprise a means for rotating, with which the shaft is in rotary driving connection, wherein the means for rotating the shaft, for example, may have a drivable chuck, which can be indirectly or directly brought into rotationally driving connection with the shaft. At least one movable holding part is provided on the shaft which can be inserted into the threaded sleeve, which can be moved from a release position radially outward into a holding position. In the holding position of the holding part, in which the holding part protrudes further in the radial direction over the shaft than in its release position, the holding part can alternatively or additionally fulfill two functions. Thus, the holding part in the holding position on the one hand protrude so far in the radial direction, that the threaded sleeve into which the shaft has been introduced in the first longitudinal direction, ie in the direction of insertion of the shaft, supported or supported on the shaft via the holding part. On the other hand, the holding part in its holding position alternatively or additionally protrude outward in the radial direction in such a way that the threaded sleeve can be rotationally coupled in the circumferential direction of the shaft via the holding part to the shaft or can be rotationally coupled. In the former case, a particularly simple handling and further processing of the threaded sleeve is ensured, especially since the shaft can be raised together with the threaded sleeve and the bore can be fed, since the threaded sleeve in the first longitudinal direction captive on the holding part on the shaft is supported or supported. In the second case, in which the rotational engagement coupling between the threaded sleeve and the shaft via the holding part in the holding position, there is the particular advantage that neither an external thread on the shaft for screwing into the threaded sleeve is required, nor the internal thread of the threaded sleeve recesses or an input-side hexagonal opening of the threaded sleeve would have to be provided, which effect a rotational drive coupling in cooperation with the shaft in order to rotate the threaded sleeve by means of the shaft can. In the former case, in which the holding member in its holding position ensures only the captive handling of the threaded sleeve, the production of the rotary driving coupling between the shaft and threaded sleeve elsewhere, so for example, via the known stop, which will be discussed in more detail later. With regard to a simple, quick and secure processing of the threaded sleeve and taking into account a simple construction of the screwing device, it is preferred if the holding part in its holding position both a support of the threaded sleeve in the first longitudinal direction on the holding part on the shaft and a rotational driving coupling in Circumferentially causes the shaft over the holding part with the shaft.

In principle, both the support of the threaded sleeve in the longitudinal direction on the holding part on the shaft and the rotational driving coupling of the threaded sleeve on the holding part with the shaft by a frictional connection by the holding member is pressed in its holding position, for example, against the inside of the threaded sleeve. However, in order to achieve a particularly secure support in the first longitudinal direction and / or a particularly safe rotational driving coupling in the circumferential direction, the threaded sleeve is in the holding position of the holding part in a preferred embodiment of the inventive Eindrehvorrichtung supportive over the holding part on the shaft supportable or supported and / or positively coupled via the holding part with the shaft drehmitkupplungbar or rotationally coupled. So it is further preferred in this embodiment, when the holding part can be introduced by moving from the release position to the holding position in a recess in the threaded sleeve or is introduced to achieve said positive support and / or positive rotational drive coupling. The recess is preferably a cutting recess. This has the advantage that a usually existing anyway cutting recess in the threaded sleeve is used for the said form-fitting, without a special adaptation of the threaded sleeve would be required to the Eindrehvorrichtung. Under a cutting recess is here as well as below preferably to understand a radial recess in the threaded sleeve, which is formed radially continuous and on its radially outwardly facing side of the shaping of the cutting edges of the self-tapping external thread of the threaded sleeve.

In order to ensure a particularly quick and easy processing of the threaded sleeve, the shaft is insertable into the threaded sleeve in a further preferred embodiment of the driving device according to the invention without a relative rotation relative to the threaded sleeve in the first longitudinal direction. Thus, the shaft is designed such that it can be introduced into the threaded sleeve basically translationally in the first longitudinal direction. It is preferred if the shaft or at least one insertable into the threaded sleeve portion of the shaft has a smooth outer side, which therefore has no discontinuities, which in particular includes that on the outside of the shaft or of the threaded sleeve insertable portion of the shaft no external thread is provided. This has the advantage that the shaft can be introduced without hindrance into the threaded sleeve with the internal thread therein. It is also preferred if the shaft or at least the portion of the shaft which can be inserted into the threaded sleeve has a circular cross-section and is particularly preferably cylindrical in order to achieve the stated advantages.

In order to be able to provide a shaft which on the one hand can be arranged particularly close to the internal thread of the threaded sleeve to ensure a short distance between release position and holding position of the holding part, and on the other hand to ensure a simplified insertion of the shaft into the threaded sleeve, the shaft is at least in a pointing in the first longitudinal direction end portion in a further advantageous embodiment of the inventive turning device in the first longitudinal direction tapers. In this case, in particular, a conical taper of the shank in the end section pointing in the first longitudinal direction thereof has proved to be advantageous in order to allow a simple insertion of the shank into the threaded sleeve.

In a further advantageous embodiment of the inventive turning device at least two of said movable holding parts are provided to a particularly secure support of the threaded sleeve in the first longitudinal direction on the holding parts on the shaft and / or a safe rotational driving coupling in the circumferential direction of the threaded sleeve on the holding parts with the shaft to achieve. In this embodiment, it is preferred if the at least two holding parts are arranged uniformly spaced in the circumferential direction of the shank in order to ensure a uniform support of the threaded sleeve in the first longitudinal direction or / and a uniform transmission of the torque of the shaft to the threaded sleeve.

To ensure a particularly dense arrangement of the holding part on the internal thread of the threaded sleeve, even if the holding part is still in the release position, so that only a small distance is overcome to get into the holding position, the holding part or are the at least two holding parts provided in a particularly preferred embodiment of the inventive turning device on a cylindrical portion of the shaft.

In principle, the movable holding part can be specifically driven and controlled via a motor drive or the like in order to move it from the release position into the holding position or from the holding position back into the release position. However, in order to achieve a particularly simple construction of the driving device, the holding part is resiliently biased in a holding position in a particularly advantageous embodiment of the driving device according to the invention. Thus, the individual holding part, for example, be associated with a corresponding spring element, wherein in the case of multiple holding parts either each of the holding parts may be associated with a spring element or a common spring element may be provided for two or more holding parts.

In a further preferred embodiment of the inventive Einrehvorrichtung the resiliently biased in the holding position holding part by inserting the shaft into the threaded sleeve and / or by leading the shaft out of the threaded sleeve through the threaded sleeve in the release position zurückdrängbar. Thus, the holding part can be pushed back during insertion through the threaded sleeve in the release position to automatically spring upon reaching the desired position of the shaft within the threaded sleeve in the holding position. Conversely, the resiliently biased in the holding position holding part pushed back by removing the stem from the threaded sleeve through the threaded sleeve in the release position be to spring back automatically when leaving the threaded sleeve in the holding position. In this case, the spring element should be designed for the resilient bias of the holding member in the holding position such that the holding member is pushed back only upon reaching a predetermined insertion and / or Herausführkraft through the threaded sleeve in the release position. In order to simplify the pushing back of the holding part prestressed resiliently into the holding position when inserting and / or removing the shank, it is preferred in this embodiment if the holding part has a front flank pointing in the first longitudinal direction and / or a second flank facing the first longitudinal direction Has longitudinally facing rear edge, which is inclined relative to the first and / or second longitudinal direction. Also, it has been found in this embodiment to be advantageous when the front and / or rear flank is flat.

According to a further preferred embodiment of the inventive turning device, the holding part has at least one side edge pointing in the circumferential direction, wherein it is preferred if two side flanks facing each other and pointing in opposite circumferential directions are provided on the holding part. Consequently, the side flanks of the holding part of the rotary driving coupling can serve with the threaded sleeve, if they are supported for example in the circumferential direction at the edge of a recess. Here, it has proven to be advantageous if the at least one side edge is flat. In contrast to the aforementioned front and / or rear flank, it is unfavorable in the side edge of the holding part, when the holding part is forced back into the release position due to a larger torque exerted by the shaft via the holding part on the threaded sleeve. For this reason, it is further preferred in this embodiment, when the side edge includes a skew angle with the circumferential direction which is greater than the inclination angle included by the front and / or rear flank with the respective longitudinal direction. Alternatively, the side edge may not be inclined at all, but may be made transverse to the circumferential direction, thus enclosing an angle of 90 ° with the circumferential direction.

In a further advantageous embodiment of the driving device according to the invention, the holding part has a radially outwardly facing upper side in order to be able to rest on the internal thread of the threaded sleeve, for example during insertion or during removal. In this case, it is advantageous if the outwardly facing upper side connects the front and rear flanks in a straight line, wherein it has turned out to be particularly advantageous if the radially outwardly pointing upper side connects the front and rear flanks parallel to the first longitudinal direction to prevent disability when inserting or removing the shaft by hooking the radially outwardly facing top with the threads of the internal thread of the threaded sleeve. Also, the radially outwardly facing upper side should be formed so long in the opposite longitudinal directions, that it can bridge at least a single thread of the internal thread of the threaded sleeve.

In order to be able to insert the shaft securely into the threaded sleeve up to a predetermined length, the screwing device in a further advantageous embodiment of the same in a radial direction on the shaft projecting stop on which the threaded sleeve in a first longitudinal direction opposite the second longitudinal direction supported or is supported. The abovementioned abutment is preferably circumferentially formed circumferentially to ensure a particularly uniform support of the threaded sleeve on the stop. Moreover, it is preferred if the stop is rotationally engaged with the shaft or at least rotationally engageable with the shaft to prevent relative rotation between the stop and the threaded sleeve as the threaded sleeve is rotated about the shaft to engage the bore to turn inside a component. Also, the stop can transmit part of the torque to be transmitted to the threaded sleeve. The abovementioned abutment can be formed integrally with the shank, for example, and / or permanently fixed or fastened to the shank.

In order to change the maximum insertion length of the shaft and adjust the Eindrehvorrichtung in this way to different lengths of threaded sleeves, the stop is adjustable by changing the maximum insertion length of the shaft relative to the shaft. As a result, the greatest possible flexibility with respect to differently long threaded sleeves is guaranteed. The stop is preferably fixable in the longitudinal direction on the shaft, wherein the determination can be made detachable to allow the previous adjustment while changing the maximum possible insertion length of the shaft. For the purpose of fixing, for example, a locking screw may be provided on the stop, which cooperates with the shaft to set the stop or to solve this. Moreover, it is preferred in this embodiment, when the stop is designed as an annular stop which is pushed onto the shaft in order to allow a particularly simple adjustment of the stop and to ensure a simple construction of the Eindrehvorrichtung.

In a further advantageous embodiment of the driving device according to the invention, this has a connecting shaft which is rotatably connected to a device for rotating the shaft or rotatably connected to such a device as part of the driving device. In this case, the connecting shaft preferably has a cross section deviating from the shaft. It is also preferred if the connecting shaft is rotationally connected to the shaft or is integrally formed with the shaft in order to connect the device for rotating the shaft via the connecting shaft to the shaft. Analogously, the connection shaft serves here, on the one hand, to connect to said device and, on the other hand, to transmit the torque of the device to the shaft.

According to a further advantageous embodiment of the inventive turning-in device, the connecting shaft has a cross-section deviating from a circular cross-section, in order to achieve a simple, in particular positive, rotary driving connection with the device for rotating the shaft via the connecting shaft. In particular, a polygonal cross section or a hexagonal cross section of the connecting shaft has proven to be advantageous.

In a further preferred embodiment of the driving device according to the invention, the connecting shaft is set back in the radial direction with respect to the abovementioned stop, so that the abovementioned stop can equally function as a stop when inserting the connecting shaft into a corresponding receptacle, for example a lathe chuck, which facilitates the handling of the driving device much easier. It is also preferred in this embodiment, when a ring-shaped stop, which is pushed onto the shaft, is equally pushed over the connecting shaft on the shaft, so that the attachment and positioning of the stopper is simplified. In other words, in the case of an annular stop which can be pushed onto the shaft, the central recess should be dimensioned such that it can also be pushed onto or over the connecting shaft.

The inventive use relates to a use of a driving device according to one of the above-described embodiments of the invention for screwing a threaded sleeve with a self-tapping external thread and an internal thread in a bore within a component, preferably a component which is formed of no softer material than the threaded sleeve itself , It is preferred if the Eindrehvorrichtung is used for screwing a threaded sleeve having at least one cutting recess. It is also preferred if the said cutting recess is provided as edge-side recess in the threaded sleeve in order to simplify the already described above engagement of the holding member in its holding position in the cutting recess and to achieve the positive locking already mentioned above. With regard to the advantages of using the Eindrehvorrichtung reference should be made to the advantages of the Eindrehvorrichtung invention described above, which apply in a corresponding manner for use.

The inventive method for screwing a threaded sleeve into a bore has the method steps described in more detail below. First, a threaded sleeve, which has a self-tapping external thread and an internal thread, provided here - as already stated above - is to distinguish between a threaded sleeve and a wire thread insert, which has in contrast to the threaded sleeve no substantially closed sleeve or tubular body. It is preferred if the provided threaded sleeve has at least one radial recess, optionally a cutting recess. After providing the threaded sleeve, the shaft of a driving device, for example a driving device of the type according to the invention, is inserted into the threaded sleeve in its first longitudinal direction. In this case, insertion preferably takes place without a relative rotation of the shank relative to the threaded sleeve, that is to say essentially translationally. Already during or only after insertion is at least one movably provided on the shaft holding part from a release position radially outwardly into a holding position while obtaining a support of the threaded sleeve in the first longitudinal direction on the holding part on the shaft and / or under rotational drive coupling of the shaft with the Threaded sleeve moves over the holding part in the circumferential direction. In this case, it is preferable for the retaining part to extend into its holding position into the aforementioned recess or cutting recess. The support of the threaded sleeve in the first longitudinal direction via the holding part in this case causes a substantially captive arrangement of the threaded sleeve on the shaft, while the Rotary driving coupling of the shaft with the threaded sleeve on the holding part opens the possibility of torque or rotation of the shaft on the holding part to transfer to the threaded sleeve. Subsequently, the threaded sleeve is screwed into the bore within the component, with the self-tapping external thread of the threaded sleeve in the wall the bore drilled and ensures a secure hold of the threaded sleeve within the bore. In connection with the screwing of the threaded sleeve into the bore, it should be mentioned that the rotational movement of the shank does not necessarily have to be transmitted to the threaded sleeve via the retaining part in its holding position, for example if the retaining part is primarily the captive arrangement of the threaded sleeve on the threaded sleeve Shank should serve, but the actual transmission of the rotational movement or the torque can also be done elsewhere or by other means. However, it has proven to be advantageous to achieve the rotary driving coupling of the shaft with the threaded sleeve on the holding part.

In a preferred embodiment of the method according to the invention, the insertion of the shaft into the threaded sleeve takes place while pushing back the biased in the holding position holding part by the threaded sleeve in the release position. As a result, a targeted driving or controlling the movement of the holding part is unnecessary, which makes the process easier and safer. Alternatively or additionally, the movement of the biased in the holding position holding member from the release position to the holding position is carried out automatically when the shaft was led out together with the holding part, for example, from the threaded sleeve or inserted into the desired insertion position.

• 1 eine Seitenansicht einer ersten Ausführungsform einer Eindrehvorrichtung in teilweise geschnittener Darstellung,
• 1a den Ausschnitt A von 1 bei einer zweiten Ausführungsform der Eindrehvorrichtung nach 1,
• 2 eine Vorderansicht der Eindrehvorrichtung von 1,
• 3 eine Seitenansicht einer Gewindehülse in geschnittener Darstellung,
• 4 eine Vorderansicht der Gewindehülse von 3,
• 5 eine Seitenansicht der Eindrehvorrichtung sowie der Gewindehülse beim Einführen des Schaftes in die Gewindehülse,
• 6 die Anordnung nach 5 nach dem Einführen des Schaftes in die Gewindehülse,
• 7 die Anordnung nach 6 nach dem Anheben des Schaftes zusammen mit der Gewindehülse,
• 8 die Anordnung nach 7 während des Eindrehens der Gewindehülse in eine Bohrung,
• 9 die Anordnung nach 8 nach dem vollständigen Eindrehen der Gewindehülse in die Bohrung und
• 10 die Anordnung nach 9 beim Herausführen des Schaftes aus der in die Bohrung eingedrehten Gewindehülse.

The invention is explained in more detail below with reference to exemplary embodiments with reference to the accompanying drawings. Show it:

• 1 a side view of a first embodiment of a driving device in a partially sectioned view,
• 1a the clipping A from 1 in a second embodiment of the turning device according to 1 .
• 2 a front view of the driving device of 1 .
• 3 a side view of a threaded sleeve in a sectional view,
• 4 a front view of the threaded sleeve of 3 .
• 5 a side view of the screwing device and the threaded sleeve during insertion of the shaft in the threaded sleeve,
• 6 the arrangement after 5 after insertion of the shank into the threaded sleeve,
• 7 the arrangement after 6 after raising the shank together with the threaded sleeve,
• 8th the arrangement after 7 during the screwing of the threaded sleeve into a bore,
• 9 the arrangement after 8th after completely screwing the threaded sleeve into the hole and
• 10 the arrangement after 9 when taking out the shaft from the threaded sleeve screwed into the bore.

1 shows a driving device 2 , The screwing device 2 essentially consists of a tool 4 and a merely schematically indicated device 6 for turning the tool 4 or its later described in more detail shaft together. Here is the tool 4 rotatable, but detachable, with the device 6 connected or connectable.

The tool 4 has a rotatable shaft 8th extending in opposite longitudinal directions, hereinafter referred to as first longitudinal direction 10 and second longitudinal direction 12 be designated, wherein the first longitudinal direction 10 could also be referred to as insertion direction. Moreover, in the figures, the opposite circumferential directions 14 . 16 , also called the directions of rotation of the shaft 8th can be referred to, as well as the opposite radial directions 18 . 20 indicated by corresponding arrows, with a central longitudinal axis 22 of the shaft 8th in the opposite longitudinal directions 10 . 12 which also acts as the axis of rotation of the shaft 8th can be designated.

The shaft 8th has a in the first longitudinal direction 10 pointing free end 24 on, that of the institution 6 turned away. In a in the second longitudinal direction 12 to the free end 24 subsequent end section 26 is the shaft 8th in the first longitudinal direction 10 formed tapered, wherein it is a conical taper in the illustrated embodiment. In the second longitudinal direction 12 joins another shaft portion, which has a circular cross-section, thus as a cylindrical portion 28 is trained. How out 1 can be seen, the cylindrical section 28 or at least its insertable into the later described threaded sleeve and in the first longitudinal direction 10 pointing section one in the radial direction 18 outwardly facing smooth outside 30 on, leaving the outside 30 has no discontinuities and in particular no external thread, as is sometimes known from the prior art. In the second longitudinal direction 12 closes another end section 32 of the shaft 8th to the cylindrical section 28 at, with this end portion 32 in the second longitudinal direction 12 has. Also, the end section tapers 32 in the second longitudinal direction 12 , wherein also here a substantially conical taper is provided.

In addition, the tool points 4 the Eindrehvorrichtung 2 a connection shaft 34 on top of that with the decor 6 for turning the shaft 8th rotatably connected or connected. The connection shaft 34 follows in the second longitudinal direction 12 on the end section 32 of the shaft 8th and is in rotational drive connection with this. For this purpose, the connection shaft 34 integral with the shaft 8th formed, wherein the connection shaft 34 also in the opposite longitudinal directions 10 . 12 along the central longitudinal axis 22 up to one in the second longitudinal direction 12 pointing free end 36 extends. In contrast to the shaft 8th indicates the connection shaft 34 a deviating from a circular cross section cross section. So can the connection shaft 34 For example, have a polygonal cross-section, which in the illustrated embodiment with reference to a hexagonal cross-section of the connecting shaft 34 is indicated. Moreover, the liaison is 34 in the radial direction 20 set back against the stop later described in detail, in the illustrated embodiment, also with respect to the shaft 8th , More specifically, that is in the radial direction 18 outwardly facing outside of the connecting shaft 34 in the radial direction 20 inside towards the outside 30 of the cylindrical section 28 of the shaft 8th reset.

Furthermore, the tool points 4 the Eindrehvorrichtung 2 one in the radial direction 18 over the shaft 8th or on the outside 30 of the cylindrical section 28 protruding stop 38 on. Here is the stop 38 in the circumferential direction 14 . 16 around the shaft 8th formed circumferentially. In the illustrated embodiment, the stop 38 as an annular stop 38 formed in the first longitudinal direction 10 over the connection shaft 34 or in the second longitudinal direction 12 on the shaft 8th or the cylindrical section 28 is deferred. So has the annular stop 38 one in the circumferential direction 14 . 16 circumferential and in the first longitudinal direction 10 pointing front ring surface 40 and one in the circumferential direction 14 . 16 circumferential and in the second longitudinal direction 12 facing rear ring surface 42 on. At the front ring surface 40 can the threaded sleeve described in more detail later in the second longitudinal direction 12 be supported. The annular stop 38 is - albeit releasable - in the opposite longitudinal directions 10 . 12 on the cylindrical section 28 of the shaft 8th established. For the purpose of fixing a fixing screw extends 44 in a radial through hole 46 within the stop 38 , in which an internal thread is formed. By screwing in the fastening screw 44 into the through hole 46 pushes the screw in the radial direction 20 against the cylindrical section 28 of the shaft 8th to the annular stop 38 with the shaft 8th to jam and thereby in the longitudinal directions 10 and 12 on the shaft 8th set. Will the fixing screw 44 but solved, so is the annular stop 38 along the shaft 8th or of the cylindrical section 28 adjustable or displaceable. Thus, by adjusting the stop 38 in one of the longitudinal directions 10 . 12 along the shaft 8th a maximum possible insertion length a of the shaft 8th be changed to the tool 4 to adapt flexibly to different lengths of the threaded sleeves to be processed, the stop 38 after setting the desired maximum insertion length a again with the help of the fixing screw 44 longitudinal 10 . 12 on the shaft 8th can be determined. The maximum possible insertion length a hereby denotes the distance in the longitudinal direction 10 . 12 between the front ring surface 40 of the stop 38 and the free end 24 of the shaft 8th ,

In addition, the tool points 4 the Eindrehvorrichtung 2 at least one movable holding part 48 on, on the shaft 8th is provided. More specifically, on the shaft 8th two movable holding parts 48 . 50 provided in the circumferential direction 14 . 16 of the shaft 8th are arranged evenly spaced from each other. One can also speak of the two holding parts 48 . 50 related to the longitudinal directions 10 . 12 at the same height of the shaft 8th are arranged offset by 180 ° to each other. Here are the two holding parts 48 . 50 each at the cylindrical portion 28 of the shaft 8th provided and in the first longitudinal direction 10 looked behind the stop 38 and the free end 24 arranged facing. As in 1 indicated at least schematically, are the holding parts 48 each in a receptacle within the shaft 8th arranged and thereby in the radial direction 18 to the outside in a holding position and in the opposite radial direction 20 inwardly movable to a release position, wherein the holding parts 48 . 50 in the in 1 shown holding position in the radial direction 18 outwards over the outside 30 of the cylindrical section 28 stand out as in the in 5 shown release position in which the holding parts 48 . 50 in the radial direction 20 inside to the level of the outside 30 of the cylindrical section 28 can be pushed back. Here are the holding parts 48 . 50 resilient in the radial direction 18 outwards into the holding position 1 prestressed, for which purpose each of the holding parts 48 . 50 a in 1 schematically indicated spring element 52 can be assigned. Alternatively, a common spring element for both holding parts 48 . 50 possible, if not advantageous.

The holding parts 48 . 50 each have one in the first longitudinal direction 10 pointing front flank 54 and one in the second longitudinal direction 12 pointing rear flank 56 on. Front and back flank 54 . 56 are just trained or / and these are essentially straight. Here is the front edge 54 opposite the first longitudinal direction 10 forming a skew angle α tilted while the rear flank 56 forming a skew angle β opposite the second longitudinal direction 12 is inclined, as this particular 1 can be seen. As a result, the later described in detail restraint of the holding parts 48 . 50 during insertion or removal of the shaft 8th be simplified in or out of the threaded sleeve. In addition, the holding parts 48 . 50 one in the radial direction 18 outward facing top 58 on, which in the radial direction 18 outward-pointing ends of the inclined flanks 54 . 56 connects in a straight line. In this case, the top extends 58 parallel to the longitudinal directions 10 . 12 or the longitudinal axis 22 ,

As in particular the 1 and 2 refer to the holding parts 48 . 50 also one in the circumferential direction 14 pointing first side flank 60 and one in the opposite circumferential direction 16 pointing second side flank 62 on, with the side flanks 60 . 62 or at least one of the two side flanks 60 . 62 just trained. The side edges can 60 respectively. 62 with the respective circumferential direction 14 respectively. 16 a skew angle with the respective circumferential direction 14 respectively. 16 However, in this case, the respective skew angle should be greater than that of the front and / or rear flank 54 . 56 with the respective longitudinal direction 10 respectively. 12 included skew angle α respectively. β be. In the illustrated embodiment, the side edges 60 . 62 but not to the respective circumferential direction 14 respectively. 16 obliquely, but rather transversely, ie they are each perpendicular to the respective circumferential direction 14 respectively. 16 aligned, as in 2 is indicated.

Marriage closer to that of the Eindrehvorrichtung 2 to be processed threaded sleeve and the Eindrehvorrichtung 2 The underlying method will be discussed below first to a second embodiment 1a be referenced, the section A from 1 in a modified form. In the embodiment according to 1a are the holding parts 48 . 50 formed by a ball or at least a spherical segment. It is in the holding position of the holding parts 48 . 50 a spherical segment-shaped portion of the receptacle in the radial direction 18 outwards over the outside 30 of the cylindrical section 28 of the shaft 8th out. Incidentally, the foregoing statements apply to the holding parts 48 . 50 essentially corresponding.

The 3 and 4 show a threaded sleeve 64 , by means of the Eindrehvorrichtung 2 from the 1 to 2 is screwed into a bore, wherein in the 3 and 4 shown longitudinal directions 10 . 12 , Circumferential directions 14 . 16 and radial directions 18 . 20 the foregoing with reference to the driving device 2 to correspond to described directions.

The threaded sleeve 64 has a substantially closed sleeve or tubular body 66 on, extending in the longitudinal directions 10 . 12 extends. On the in the radial direction 20 inside facing side is an internal thread 68 formed while in the radial direction 18 outwardly facing side a self-tapping external thread 70 is provided. At the in the first longitudinal direction 10 pointing front edge 72 the threaded sleeve 64 two edge cuts are provided which extend substantially in the second longitudinal direction 12 extend and two cutting recesses 74 . 76 form. The two cutting recesses 74 . 76 are in the circumferential direction 14 . 16 equally spaced apart or offset by 180 ° to each other. Also have the in the circumferential directions 14 . 16 pointing edges of the cutting recesses 74 . 76 a substantially parallel course to the longitudinal directions 10 . 12 on. Here are the mentioned edges in the 3 and 4 with the reference numerals 78 . 80 Mistake. While the cutting recesses 74 longitudinal 10 , ie in the direction of the front edge 72 the threaded sleeve 64 are open, these are in the second longitudinal direction 12 through the sleeve body 66 limited, here a support edge 82 formed. On the front edge 72 the threaded sleeve 64 opposite side of the threaded sleeve 64 is accordingly a back edge 84 the threaded sleeve 64 provided in the circumferential direction 14 . 16 is formed circumferentially.

Below are further features of the Eindrehvorrichtung 2 with reference to the 5 to 10 described in which the use of the Eindrehvorrichtung 2 or the method for screwing the threaded sleeve 64 is shown in more detail in a hole.

In the method for screwing the threaded sleeve 64 in the in the 8th to 10 illustrated hole 86 within a component 88 will first - as in 5 shown - the threaded sleeve 64 according to the 3 and 4 provided, wherein the threaded sleeve 64 with its front edge 72 on a pad 90 is turned off. Then the shaft is 8th the Eindrehvorrichtung 2 with the free end 24 advancing in the first longitudinal direction 10 in the threaded sleeve 64 introduced, in particular the tapered end section 26 facilitates the initial insertion or threading. If the shaft 8th during insertion then so far into the threaded sleeve 64 that the rear edge 84 the threaded sleeve 64 against the front flank 54 the holding parts 48 . 50 in their holding position presses and exceeds the in the first longitudinal direction 10 acting insertion force 92 a predetermined limit, this has the consequence that the further insertion of the shaft 8th in the threaded sleeve 64 by pushing back the prestressed into the holding position holding parts 48 . 50 through the threaded sleeve 64 in the release position of the holding parts 48 . 50 takes place, as in 5 is shown. In the release position shown, the associated spring elements 52 the holding parts 48 . 50 compressed in a corresponding manner. The insertion of the shaft 8th in the threaded sleeve 64 can without a relative rotation of the shaft 8th opposite the threaded sleeve 64 in one of the circumferential directions 14 . 16 done, thanks to the smooth outside 30 is ensured on the just no external thread is provided, which in the internal thread 68 the threaded sleeve 64 should be screwed.

Get the holding parts 48 . 50 in the course of further insertion in the first longitudinal direction 10 in the threaded sleeve 64 in the area of the cutting recesses 74 . 76 so the holding part becomes 48 due to the bias in the radial direction 18 outwards into the holding position and into the cutting recess 74 moves while the holding part 50 due to the bias in the radial direction 18 outward into the holding position within the cutting recess 76 is moved. Should the cutting recesses 74 . 76 opposite the holding parts 48 . 50 in the circumferential direction 14 . 16 can be staggered, so the shaft 8th relative to the threaded sleeve 64 be twisted to the holding parts 48 . 50 and the cutting recesses 74 . 76 to match and the holding parts 48 . 50 thus release, so that these in the manner described in the holding position and thus in the respective cutting recess 74 . 76 can be moved. The holding parts 48 . 50 that fit into the cutting recesses 74 . 76 extend are in 6 shown. Thus, the insertion process is essentially completed.

In the holding position is the threaded sleeve 64 in the first longitudinal direction 10 over the holding parts 48 . 50 on the shaft 8th supportable or supported. More precisely, the rear edges 84 the cutting recesses 74 . 76 on the back flanks 56 the two holding parts 48 . 50 can be supported or supported in their holding position. Thus, the tool can 4 the Eindrehvorrichtung 2 now in the second longitudinal direction 12 together with the threaded sleeve 64 be raised as in 7 is shown, especially the threaded sleeve 64 over the holding parts 48 . 50 in the holding position captive on the shaft 8th is arranged.

The thus raised tool 4 can now together with the captive threaded sleeve 64 to the hole 86 in the component 88 be introduced as in 8th is indicated. This is the threaded sleeve 64 initially centered to the hole 86 attached to the input-side opening. Then the shaft is 8th over the connection shaft 34 through the device 6 in the circumferential direction 14 rotated and in the first longitudinal direction 10 moved down, with the rear edge 84 the threaded sleeve 64 in the second longitudinal direction 12 on the front ring surface 40 of the stop 38 is supportable or supported, as in 8th you can see. The holding parts in the holding position 48 . 50 extend into the cutting recesses 74 . 76 , whereby these not only a positive support of the threaded sleeve 64 in the first longitudinal direction 10 on the holding parts 48 . 50 cause, rather, is by the holding parts 48 . 50 within the cutting recesses 74 . 76 the threaded sleeve 64 also a rotary driving coupling in the circumferential direction 14 as well as in the circumferential direction 16 between the shaft 8th and the threaded sleeve 64 by means of the holding parts 48 . 50 causes. More specifically, the rotational movement of the shaft 8th in the circumferential direction 14 thereby on the threaded sleeve 64 transfer that side edges 60 the holding parts 48 . 50 in the circumferential direction 14 on the edges 78 the cutting recesses 74 be supported or supported. Consequently, the threaded sleeve completes 64 also a rotational movement in the circumferential direction 14 , so that the self-tapping external thread 70 the threaded sleeve 64 into the wall of the hole 86 cuts in and the threaded sleeve 64 thus in the first longitudinal direction 10 into the hole 86 is screwed in.

Is the threaded sleeve 64 in this way completely into the hole 86 screwed in, like this in 9 is shown, the screwing is completed, it being preferred, if at the end of the screwing on the shaft 8th longitudinal 10 . 12 fixed stop 38 with its front ring surface 40 at least partially at the top 94 of the component 88 strikes, in which the Eindrehvorrichtung 2 facing opening of the bore 86 is provided to thereby obtain a corresponding signal that the screwing is completed.

Now the tool can 4 without any relative rotation to the threaded sleeve 64 again in the second longitudinal direction 12 from the threaded sleeve 64 be pulled out. At first the slanted rear flanks beat 56 the holding parts 48 . 50 on the support edge 82 on and the two holding parts 48 . 50 be through the threaded sleeve 64 from their stop position 9 in their release position 10 pushed back when on the shaft 8th acting leader 96 exceeds a predetermined limit.

Is the shaft 8th from the threaded sleeve 64 brought out, so requires the bias of the holding parts 48 . 50 an automatic retraction of the holding parts 48 . 50 in their holding position 1 so the tool 4 or the Eindrehvorrichtung 2 for processing a further threaded sleeve 64 is available.

LIST OF REFERENCE NUMBERS

2

Eindrehvorrichtung

4

Tool

6

Facility

8th

shaft

10

first longitudinal direction

12

second longitudinal direction

14

circumferentially

16

circumferentially

18

radial direction

20

radial direction

22

longitudinal axis

24

free end

26

end

28

cylindrical section

30

smooth outside

32

end

34

connecting shaft

36

free end

38

attack

40

front ring surface

42

rear ring surface

44

fixing screw

46

Through Hole

48

holding part

50

holding part

52

spring element

54

front flank

56

rear flank

58

top

60

first side flank

62

second side flank

64

threaded sleeve

66

sleeve body

68

inner thread

70

external thread

72

front edge

74

cutting recess

76

cutting recess

78

edge

80

edge

82

supporting edge

84

rear edge

86

drilling

88

component

90

document

92

insertion

94

top

96

Lead-out force

a

maximum possible insertion length

α

Skew angle

β

Skew angle

Claims (11)

Turning device (2) for screwing a threaded sleeve (64) having a self - tapping external thread (70) and an internal thread (68), in a bore (86) with a rotatable shaft (8) in a first longitudinal direction (10) in the threaded sleeve (64) is insertable, characterized in that at least one movable holding part (48; 50) is provided on the shank (8) which can be moved from a release position radially outwards into a holding position in which the threaded sleeve (64) in the first longitudinal direction (10) via the holding part (48; 50) on the shaft (8) supported or supported and / or in the circumferential direction (14, 16) of the shaft (8) via the holding part (48; 50) with the shaft (8) is rotatable coupleable or torque coupled. Turning device (2) after Claim 1 , characterized in that the threaded sleeve (64) in the holding position of the holding part (48; 50) by means of the retaining part (48; 50) on the shaft (8) supported or supported or / and on the holding part (48; the shaft (8) is rotatably coupled or rotationally coupled and the retaining member (48; 50) is preferably introduced or inserted into the threaded sleeve (64) by moving from the release position to the retaining position into a recess or cutting recess (74; Turning device (2) according to one of Claims 1 or 2 , characterized in that the shaft (8) without a relative rotation relative to the threaded sleeve (64) in the first longitudinal direction (10) in the threaded sleeve (64) is insertable, wherein the shaft (8) or at least one in the threaded sleeve (64) insertable portion of the shank (8) preferably has a smooth outer side (30), in particular no external thread, and / or a circular cross-section, is particularly preferably cylindrical, and / or the shank (8) at least in one in the first longitudinal direction (10 ) pointing end portion (26) in the first longitudinal direction (10), preferably tapered, is tapered. Turning device (2) according to one of the preceding claims, characterized in that at least two movable holding parts (48, 50) are provided, wherein the at least two holding parts (48, 50) preferably in the circumferential direction (14, 16) of the shaft (8) uniformly are spaced apart, and / or the holding part (48, 50) on a cylindrical portion (28) of the shank (8) is provided. Turning device (2) according to one of the preceding claims, characterized in that the holding part (48; 50) is resiliently biased into the holding position, the holding part (48; 50) preferably being inserted into the threaded sleeve (64) by inserting the shank (8). and / or by bringing the shaft (8) out of the threaded sleeve (64) through the threaded sleeve (64) into the release position and particularly preferably in the first longitudinal direction (10) facing front edge (54) and / or one in the the second longitudinal direction (12) facing the first longitudinal direction (10) rear edge (56) which is inclined relative to the first and / or second longitudinal direction (10; 12), wherein the front and / or rear edge (54; 56) optionally formed just. Turning device (2) according to one of the preceding claims, characterized in that the holding part (48; 50) has at least one peripheral side (14, 16) facing side edge (60; 62), which is preferably flat or / and a skew angle with the circumferential direction (14, 16) being greater than the skew angle (α; β) included by the front and / or rear flank (54; 56) with the respective longitudinal direction (10; 12), or to the circumferential direction (14; 16) is transversely positioned, and / or has at least one radially outwardly facing upper side (58) which preferably connects the front and rear flanks (54, 56) in a straight line and / or parallel to the first longitudinal direction (10). Turning device (2) according to one of the preceding claims, characterized in that the screwing device (2) in the radial direction (18) over the shaft (8) protruding, preferably in the circumferential direction (14, 16) encircling or / and with the shaft ( 8) in rotationally driving connection or can be brought, stop (38) on which the threaded sleeve (64) in one of the first longitudinal direction (10) opposite second longitudinal direction (12) is supported or supported and the most preferably changing a maximum insertion length ( a) of the shank (8) relative to the shank (8) is adjustable, wherein the stop (38) optionally in the longitudinal direction (10, 12) releasably secured to the shaft (8) and / or as an annular stop (38) on the Shaft (8) is pushed. Turning device (2) according to one of the preceding claims, characterized in that the screwing device (2) has a connection shaft (34), preferably in rotary connection with the shaft (8) or integrally formed therewith, which is provided with a device (6). for rotation of the shank (8) rotatably connected or with such a device (6) as part of the driving device (2) rotatably connected, wherein the connecting shaft (34) particularly preferably a deviating from a circular cross-section, optionally a multi-or hexagonal Cross section, and / or in the radial direction (20) relative to the stop (38) is reset. Use of a screwing device (2) according to one of the preceding claims for screwing a threaded sleeve (64) with a self-tapping external thread (70) and an internal thread (68) in a bore (86), preferably a threaded sleeve (64) with at least one recess or cutting recess (74, 76), which is particularly preferably designed as edge-side incision. A method for screwing a threaded sleeve (64) into a bore (86) comprising the steps of providing a threaded sleeve (64) having a self-tapping external thread (70) and an internal thread (68), preferably further comprising at least one recess or cutting recess (74; 76), insertion of the shank (8) of a screwing device (2), optionally a screwing device (2) according to one of Claims 1 to 8th in its first longitudinal direction (10) into the threaded sleeve (64), preferably without a relative rotation of the shank (8) relative to the threaded sleeve (64), moving at least one holding member (48; 50) movably provided on the shank (8) Release position radially outward into a holding position, in which the holding part (48, 50) preferably in the recess or cutting recess (74; 76) extends to support the threaded sleeve (64) in the first longitudinal direction (10) via the retaining member (48; 50) on the shaft (8) and / or by rotationally engaging the shaft (8) ) with the threaded sleeve (64) via the holding part (48; 50) in the circumferential direction (14, 16), and screwing the threaded sleeve (64) in the bore (86). Method according to Claim 10 in that the insertion of the shank (8), pushing back the holding member (48; 50) biased back into the holding position by the threaded sleeve (64) in the release position and / or moving the in the holding position biased holding part (48; 50) of the Release position in the holding position is done automatically.

Images