Tightening ring for screw device, reaction force transmission member for screw device, and screw device

Abstract

A retaining ring (10) for securing a reaction force transmission element to a housing (102) of a screwdriving device (100), wherein the screwdriving device (100) has an axially extending housing section (108) with a housing profile to which the reaction force transmission element can be positively attached, and wherein the housing section (108) has an at least partially circumferential groove (112), with a retaining ring (12) and with a locking ring (14), wherein the retaining ring (12) has a retaining ring hole (12a) with an inner profile adapted to the housing profile of the housing section (108), wherein the locking ring (14) has a locking ring hole (14a) with an inner profile adapted to the housing profile of the housing section (108) and a thickness adapted to the groove (112), wherein the retaining ring (12) and the locking ring (14) are arranged coaxially to each other and are held axially to each other.wherein in a basic position the retaining ring hole (12a) and the locking ring hole (14a) at least partially overlap, wherein the locking ring (14) is rotatably arranged about a central axis (M) common with the retaining ring (12) relative to the retaining ring (12) and, in the state arranged on the housing section (108), the locking ring (14) is rotatable from the basic position relative to the retaining ring (12) into a locking position in which the locking ring (14) engages in the groove (112) at least with a locking section.

Description

[0001] The present invention relates to a retaining ring for a screwing device, a reaction force transmission element for a screwing device and a screwing device.

[0002] Screwdriving tools, such as screwdrivers or rotary screwdrivers, are used to tighten or loosen screws. Various types of screwdriving tools exist, driven, for example, pneumatically, hydraulically, or electrically. To support the reaction torque transmitted to the screwdriving tool housing during tightening or loosening, reaction arms are used. A reaction arm can, for example, be positively connected to the screwdriving tool housing and, during operation, bears against the area surrounding the screw being worked. Known screwdriving tools can, for example, have a housing surrounding the output shaft, which has a housing profile with a splined shaft shape, onto which the reaction arm is pushed with a correspondingly adapted ring.To secure the reaction arm against axial movement, a circumferential groove is machined into the housing profile, into which a retaining ring is inserted. The retaining ring can only be tightened or loosened with a tool. Therefore, attaching or removing the reaction arm requires relatively complex steps. A known example of such a screwdriver is the "DP2power" model, sold under the brand name "Plarad".

[0003] The object of the present invention is to provide a retaining ring for a screwing device, by means of which simplified handling of a reaction force transmission element is possible. It is further an object of the present invention to provide a screwing device with a retaining ring for the reaction force transmission element, in which simplified handling of the reaction force transmission element is possible, as well as a reaction force transmission element that is easier to handle.

[0004] The retaining ring according to the invention is defined by the features of claim 1.

[0005] The screwing device according to the invention is defined by the features of claim 7.

[0006] The reaction force transmission element according to the invention is defined by the features of claim 13.

[0007] The retaining ring according to the invention for securing a reaction force transmission element, preferably a reaction arm, to a housing of a screwdriving device, wherein the screwdriving device has an axially extending housing section with a housing profile to which the reaction force transmission element can be positively attached, and wherein the housing section has an at least partially circumferential groove or recess, comprises a retaining ring and a locking ring. The retaining ring has a retaining ring hole with an inner profile adapted to the housing profile of the housing section, and the locking ring has a locking ring hole with an inner profile adapted to the housing profile of the housing section and a thickness adapted to the groove. The retaining ring and the locking ring are arranged coaxially to each other and held axially relative to each other.The locking ring is fixed in a fixed position, with the retaining ring hole and the locking ring hole at least partially overlapping in a basic position. The locking ring is rotatable relative to the retaining ring about a central axis common to the retaining ring. When installed on the housing section, the locking ring can be rotated from its basic position relative to the retaining ring into a locking position, in which at least one locking section of the locking ring engages in the groove. The locking ring has a thickness (extent in the axial direction) that is less than the width of the groove (extent in the axial direction), thus enabling engagement.

[0008] The retaining ring according to the invention provides a simple means of securing a reaction force transmission element to the housing of a screwdriving device. By adapting the retaining ring and the locking ring to the housing profile of the screwdriving device's housing section, the retaining ring and locking ring can be easily slid together onto the housing profile in the axial direction of the housing section. Once the locking ring is positioned in the area of ​​the groove in the housing section, it can be rotated relative to the retaining ring, which remains in position due to the adaptation of the retaining ring hole to the housing profile in the direction of rotation. The groove allows the locking ring to be rotated so that its locking section engages in the groove.This results in an overlap between the locking section and at least part of the housing profile when viewed axially, thus preventing axial movement of the retaining ring through the interaction of the locking ring and the housing profile. This allows the reaction force transmission element to be secured axially within the housing profile.

[0009] By arranging the retaining ring and locking ring coaxially, with each ring being held or fixed axially relative to the other, the retaining ring can act as a guide for the locking ring. This allows the locking ring to be advantageously rotated from its initial position into the locked position and back to its initial position for removal. Furthermore, the retaining ring according to the invention offers the particular advantage that its placement and attachment to the housing section of the screw device can be carried out without tools. To secure the reaction force transmission element, the retaining ring simply needs to be slid onto the housing section, and to achieve the locked position, the locking ring needs to be rotated. This allows for particularly easy handling.

[0010] In order to enable the reaction force transmission element to be positively attached to the housing section, the housing section has a housing profile with a cross-section having a changing radius. This housing profile, which deviates from a circular shape, is used by the retaining ring according to the invention to, on the one hand, position the retaining ring rotationally fixed to the housing section and, on the other hand, to enable an axial overlap between the retaining ring and the housing profile in the locking position of the retaining ring by means of a groove that provides an engagement point for the locking section of the retaining ring in the housing profile.

[0011] Preferably, the locking ring hole and the retaining ring hole are congruent in the basic position. In principle, the inner profile of the locking ring hole and the inner profile of the retaining ring hole can differ, provided that in the basic position the retaining ring can be slid axially onto the housing profile of the housing section of the screw device. However, designing the locking ring hole and the retaining ring hole to be congruent offers the advantage that they can be manufactured easily and, moreover, the basic position of the locking ring is easily identifiable, since the locking ring hole and the retaining ring hole are perfectly aligned in this position. Within the scope of the invention, congruent shape means that the shape of the locking ring hole and the retaining ring hole are nearly identical.For example, if the housing profile has an involute profile shape with a multitude of involute profiles, the same number of appropriately adapted projections can be arranged at the locking ring hole and retaining ring hole, which lie on top of each other in the basic position, but do not necessarily have to have the exact same length.

[0012] It can be provided that the inner profile of the locking ring hole and the inner profile of the retaining ring hole have a shape inverse to that of the housing profile. This has the advantage that the retaining ring can be easily slid onto the housing section, since it is easy to see how the retaining ring must be positioned relative to the housing profile to allow it to be slid onto the housing section.

[0013] In a preferred embodiment of the invention, the locking ring can be fixed, preferably locked, in the locked position and / or in the home position relative to the retaining ring. This ensures that the locking ring remains in the locked position and is not unintentionally rotated into the home position. The fixing can be achieved, for example, by friction locking or positive locking.

[0014] Preferably, the retaining ring according to the invention has a base ring with a base ring hole, wherein the locking ring is coaxially attached to the base ring and is rotatable relative to the retaining ring by means of the base ring. The base ring gives the retaining ring according to the invention greater stability, while at the same time simplifying the rotation of the locking ring, since it can be easily rotated by means of the base ring. For example, the base ring can be designed to be thicker than the locking ring, the thickness of which is adapted to the groove.

[0015] In a preferred embodiment of the invention, the base ring has a stop projection, wherein the stop projection has a distance A in the axial direction to the locking ring, which is adapted to a distance B in the axial direction of a stop surface of the housing section to the groove on the housing section.

[0016] The stop projection on the base ring allows the retaining ring to be positioned advantageously, since when the retaining ring is slid onto the housing section, the stop projection can abut the stop surface of the housing section, thus advantageously aligning the retaining ring with the groove to allow it to be rotated into the locking position. The stop projection on the base ring therefore facilitates easy handling of the retaining ring according to the invention.

[0017] It is also possible that the retaining ring may strike the reaction force transmission element when slid onto the housing section. In this case, the reaction force transmission element can be adapted to the length of the housing section (axial extension) by means of a fastening section, so that the locking ring is aligned with the groove in a position that allows it to rotate into the locking position.

[0018] The invention further provides that, to lock the locking ring in the locked position, a locking element arranged on the base ring engages in a recess in the retaining ring. The locking element enables a simple, positive-locking fixation of the locking ring in the locked position. The base ring also provides sufficient space for the locking element, which can be operated, for example, on the side of the base ring facing away from the locking ring. Since the retaining ring for securing the reaction force transmission element, when mounted on the housing section, is usually in contact with the reaction force transmission element or at least arranged with only a small gap to the reaction force transmission element, the previously described arrangement of the locking element on the base ring offers the advantage that the locking element can be operated in a simple manner.

[0019] The locking element can be spring-loaded towards the retaining ring and engages in the recess in the retaining ring by means of a ball or conical body. In the locked position, the ball or conical body engages in the recess and is held in this position by the spring tension of the locking element. To move the retaining ring from the locked position to the home position, the ball or conical body slides along the edge of the recess in the retaining ring and pushes the locking element away from the retaining ring against the spring tension. Furthermore, locking in the home position is also possible, in which case an additional recess can be provided in the retaining ring into which the ball or conical body is pressed when locking in the home position.

[0020] Alternatively, the locking element can be spring-loaded towards the base ring and connected to a locking pin that is drawn into the recess by the locking element. The locking pin can, for example, have a narrow section with a thickened head, with the recess being designed as an elongated slot. This slot has an extension adapted to the locking position of the locking ring and the head of the locking pin. During rotation, the narrower section of the locking pin slides along the recess, and upon reaching the locking position, the spring-loaded locking element draws the head of the locking pin into the extension of the recess. Furthermore, locking in the home position is also possible, in which case the elongated slot has a second extension into which the head of the locking pin can engage in the home position.

[0021] In a preferred embodiment of the invention, it is provided that the base ring, the locking ring and / or the retaining ring have embedded magnets.

[0022] For example, the magnets can be used to fix the retaining ring to the housing or the reaction force transmission element when it has been removed from the housing section, thus ensuring convenient storage of the retaining ring until further use. In another embodiment, where the magnets are arranged in the retaining ring, the retaining ring can adhere to the reaction force transmission element when placed on the housing profile. This allows the retaining ring to be rotated back into its initial position, removed from the housing profile along with the reaction force transmission element, and then reattached for further use.

[0023] The retaining ring according to the invention can have a first limiting device that restricts the rotation of the retaining ring and locking ring when the locking position is reached. Alternatively or additionally, a second limiting device can be provided that restricts the rotation of the retaining ring and locking ring when the home position is reached. In this way, particularly easy handling of the retaining ring according to the invention is possible.

[0024] The invention further relates to a screw device with a housing, with a housing section extending in an axial direction and having a housing profile, with a reaction force transmission element, for example a reaction arm, wherein the reaction force transmission element is positively connected to the housing section, and with a retaining ring according to the invention for securing the reaction force transmission element to the housing, wherein the housing section has a groove that is at least partially circumferential, into which the retaining ring engages.

[0025] In the screw device according to the invention, the retaining ring can be connected to the reaction force transmission element, such that, for example, the retaining ring is formed by the reaction force transmission element, for example by a fastening section of the reaction force transmission element with which the reaction force transmission element is pushed onto the housing profile. In other words, the locking ring is held axially and rotatably mounted on the fastening section of the reaction force transmission element.

[0026] The advantages of the retaining ring according to the invention that arise in connection with the screw device correspond to the advantages previously described with regard to the retaining ring according to the invention.

[0027] In the screw device according to the invention, the housing section can be, for example, a part of the housing surrounding the output shaft, such that the axial direction of the housing section corresponds to the axial direction of the output shaft.

[0028] The invention further relates to a reaction force transmission element for a screwdriving device, wherein the screwdriving device has a housing with a housing section extending in an axial direction and having a housing profile to which the reaction force transmission element can be positively attached, and wherein the housing section has a groove that at least partially circumferentially, with a fastening section and with a retaining ring according to the invention.

[0029] In the reaction force transmission element according to the invention, the retaining ring can be connected to the reaction force transmission element, such that, for example, the retaining ring is formed by the fastening section of the reaction force transmission element, with which the reaction force transmission element is pushed onto the housing profile. In other words, the retaining ring is held axially and rotatably mounted on the fastening section of the reaction force transmission element.

[0030] The invention will be explained in more detail below with reference to the following figures. These show: Fig. 1 a schematic perspective view of a part of a screw device according to the invention with a retaining ring according to the invention, Fig. 2 a schematic sectional view of a part of a screw device according to the invention with a retaining ring according to the invention and Figs. 3a and b schematic sectional views of two different embodiments of the retaining ring according to the invention.

[0031] In Fign. 1 and 2Figure 100 schematically illustrates a screwdriving device 100 according to the invention. The screwdriving device 100 comprises a housing 102, a reaction force transmission element designed as a reaction arm 104, and an output shaft 106. The housing 102 has a housing section 108 that extends axially along the output shaft 106. The housing section 108 has a housing profile with a changing radius in cross-section. In the embodiments shown in the figures, the housing profile has the form of a splined shaft or an involute profile shaft.

[0032] The reaction arm 104 has a mounting section 110, via which the reaction arm 104 can be positively connected to the housing section 108. For this purpose, the mounting section 110 has an internal profile of a through-hole that is inverse to the housing profile of the housing section 108, so that the mounting section 110 of the reaction arm 104 can engage with the housing profile of the housing section 108.

[0033] To position the reaction arm 104 in the state placed on the housing section 108, which is in Fig. 1 To secure the reaction arm 104, a retaining ring 10 is provided, which is pushed onto the housing section 108 and secures it axially against loosening. The retaining ring 10 engages in a groove 112, at least partially circumferential, which is formed in the housing profile of the housing section 108.

[0034] In the embodiments shown in the figures, where the housing profile is formed in the shape of an involute profile shaft with a plurality of radially projecting involute profiles, the groove 112 is only provided in the projecting involute profiles.

[0035] The retaining ring 10 has a retaining ring 12 and a locking ring 14. A base ring 16 is connected to the locking ring 14. The retaining ring 12 has a retaining ring hole 12a, the inner profile of which is adapted to the housing profile of the housing section 108. Similarly, the locking ring 14 has a locking ring hole 14a, the inner profile of which is also adapted to the housing profile of the housing section 108. Furthermore, the locking ring 14 has a thickness that is adapted to the width of the groove 112 in the axial direction. The thickness of the locking ring 14 is its axial extent. The retaining ring 12, the locking ring 14, and the base ring 16 are arranged coaxially with each other. For axial fixation, the locking ring 14 and the base ring 16 are fastened to each other by means of a screw connection. The retaining ring 12 is arranged between the locking ring 14 and the base ring 16.In a basic position, the retaining ring hole 12a and the locking ring hole 14a overlap, and the retaining ring 10 can be slid onto the housing profile of the housing section 108, with the inner profiles of the retaining ring hole 12a and the locking ring hole 14a engaging in the housing profile. The locking ring 14, together with the base ring 16, is rotatable relative to the retaining ring 12. When the locking ring 14 is slid onto the housing section 108 and is located in the area of ​​the groove 112, the locking ring 14 can be rotated with the base ring 16 relative to the retaining ring 12, with the locking ring 14 then engaging in the groove 112 with a locking section. In the axial direction, the locking section of the locking ring 14 covers parts of the housing profile of the housing section 108, so that the locking ring 10 is fixed in the axial direction by means of the locking ring 14.

[0036] Due to the design of the housing profile of the housing section 108 in the form of an involute profile shaft, the inner profile of the locking ring 14, which is designed inversely to the housing profile, has inwardly projecting projections 14b that engage in the longitudinal grooves 108a formed between the projecting involute profiles when the locking ring 14 is pushed onto the housing section 108. These projections 14b each form a locking section that engages in the groove 112 in the keys when the locking ring 14 is in the locked position.

[0037] The base ring 16 has a base ring hole 16a, which the output shaft 106 penetrates when the retaining ring 10 is pushed onto the housing section 108. As shown from Fig. 3a As can be seen, the base ring 16 further has a stop projection 18 that projects into the base ring hole 16a. By means of the stop projection 18, the base ring 16 can abut a stop surface 108b of the housing section 108. The stop projection 18 has a distance A in the axial direction to the locking ring 14, which corresponds to the distance B in the axial direction between the stop surface 108b and the groove 112. In this way, when the retaining ring 10 is placed on the housing section 108, the locking ring 14 can be easily positioned relative to the groove 112, so that the locking ring 14 can be easily rotated from its initial position to the locked position.

[0038] The exemplary embodiment of the retaining ring 10 according to the invention with stop projection 18 is shown in Fig. 3a shown in section. In principle, a design without a stop projection is also possible, which is shown in Fig. 3b is shown.

[0039] In the locked position, the retaining ring 12 and the locking ring 14 can be locked relative to each other. For this purpose, a locking element 20, for example a locking button, is arranged on the base ring 16, which engages in a recess 22 in the retaining ring 12. In the Fig. 3a In the illustrated embodiment, the locking element 20 is spring-loaded in the direction of the retaining ring 12 and engages in the recess 22 in the retaining ring 12 by means of a ball 20a. As soon as the locking ring 14 is in the locked position, the ball 20a and the recess 22 align, so that the locking element 20 presses the ball 20a into the recess 22. Furthermore, locking in the home position is also possible, in which case a further recess is provided in the retaining ring 12 into which the ball 20a is pressed when locking in the home position.

[0040] In this embodiment, the locking of retaining ring 12 and locking ring 14 can be released by applying a corresponding force when rotating retaining ring 12 and locking ring 14, whereby the ball 20a slides out of the recess 22 against the spring load.

[0041] In Fig. 3b An alternative embodiment of the locking element 20 is shown. In this embodiment, the locking element 20 is spring-loaded in the direction of the base ring 16 and connected to a locking pin 20b. The locking element 20 thus pulls the locking pin 20b into the recess 22. In this embodiment, the recess 22 is designed as an elongated slot with an extension. A second recess 24 is provided in the locking ring 14, into which a head 20c of the locking pin 20b can be pressed by means of the locking element 20, so that a narrow section of the locking pin 20b is located in the recess 22. This allows the locking ring 14 to be rotated relative to the retaining ring 12.In the locked position, the recess 22 has an extension into which the head 20c of the locking pin 20b can engage, the locking element 20, due to its spring tension, drawing the locking pin 20b with its head 20c into the recess 22. In this embodiment, locking in the home position is also possible, in which case the elongated hole has a second extension into which the head 20c of the locking pin 20b can engage in the home position.

[0042] In this embodiment, the locking mechanism of retaining ring 12 and locking ring 14 can be released to rotate retaining ring 12 and locking ring 14 by pressing the locking element 20.

[0043] As in Fig. 1 As schematically indicated, magnets 24 embedded in the base ring 16 can be arranged by means of which the retaining ring 10 can be attached to the reaction arm 104 in the removed state, for example, in order to store it until the next use.

[0044] The retaining ring 10 according to the invention enables easy handling of the reaction arm 104, since the reaction arm 104 can be secured to a housing 102 of a screwdriving device 100 in a simple and tool-free manner by means of the retaining ring 10. Releasing the retaining ring 10 is also possible in a simple manner, thus saving work steps compared to conventional securing methods. Bezugszeichenliste

[0045] 10 Retaining ring 12 Retaining ring 12a Retaining ring hole 14 Locking ring 14a Locking ring hole 14b Projections 16 Base ring 16a Base ring hole 18 Stop projection 20 Locking element 20a Ball 20b Locking pin 20c Head 22 Recess 24 Second recess 100 Screw device 102 Housing 104 Reaction arm 106 Output shaft 108 Housing section 108a Longitudinal grooves 108b Stop surface 110 Mounting section 112 Groove ADistance BDistance MCenter axis

Claims

1. A retaining ring (10) for securing a reaction force transmission element to a housing (102) of a screwing device (100), wherein the screwing device (100) has a housing section (108) extending in an axial direction, with a housing profile to which the reaction force transmission element can be fastened in a form-fitting manner, and wherein the housing section (108) has an at least partially circumferential groove (112), with a retaining ring (12) and with a locking ring (14), wherein the retaining ring (12) has a retaining ring hole (12a) with an inner profile adapted to the housing profile of the housing section (108), wherein the locking ring (14) has a locking ring hole (14a) with an inner profile adapted to the housing profile of the housing section (108) and a thickness adapted to the groove (112), wherein the retaining ring (12) and the locking ring (14) are arranged coaxially to one another and held relative to one another in the axial direction. are,wherein in a basic position, the retaining ring hole (12a) and the locking ring hole (14a) at least partially overlap, wherein the locking ring (14) is arranged to rotate relative to the retaining ring (12) about a central axis (M) common to the retaining ring (12), and when arranged on the housing section (108), the locking ring (14) is rotatable from the basic position relative to the retaining ring (12) into a locking position in which the locking ring (14) engages at least with a locking section in the groove (112).

2. Retaining ring according to claim 1, characterized in that the locking ring hole (14a) of the locking ring (14) and the retaining ring hole (12a) of the retaining ring (12) are congruent, wherein preferably the inner profile of the locking ring hole (14a) of the locking ring (14) and the inner profile of the retaining ring hole (12a) of the retaining ring (12) have a shape inverse to the housing profile.

3. Retaining ring according to claim 1 or 2, characterized in thatthe locking ring (14) can be fixed, preferably locked, in the locking position and / or in the basic position relative to the retaining ring (12).

4. Retaining ring according to one of claims 1 to 3, characterized by a base ring (16) with a base ring hole (16a), wherein the locking ring (14) is fastened coaxially to the base ring (16) and is rotatable relative to the retaining ring (12) by means of the base ring (16), wherein preferably the base ring (16) has a stop projection (18), wherein the stop projection (18) has a distance A from the locking ring in the axial direction, which distance is adapted to a distance B in the axial direction of a stop surface (108b) of the housing section (108) to the groove (112) on the housing section (108).

5. Retaining ring according to one of the preceding claims, characterized in thatto lock the locking ring (14) in the locking position, a locking element (20) arranged on the base ring (16) engages in a recess (22) in the retaining ring (12), wherein preferably the locking element (20) is spring-loaded in the direction of the retaining ring (12) and engages in the recess (22) in the retaining ring (12) by means of a ball (20a) or a conical body, or wherein preferably the locking element (20) is spring-loaded in the direction of the base ring (16) and is connected to a locking pin (20b) which is pulled into the recess (22) by the locking element (20).

6. Retaining ring according to one of the preceding claims, characterized in that the base ring (16), the locking ring (14) and / or the retaining ring (12) has embedded magnets (24).

7. A screwing device (100) with a housing (102), with a reaction force transmission element, with a housing section (108) extending in an axial direction and having a housing profile, wherein the reaction force transmission element is positively connected to the housing section, and with a locking ring (10) for securing the reaction force transmission element to the housing (102), wherein the housing section (108) has an at least partially circumferential groove (112) into which the locking ring (10) engages, characterized in thatthe retaining ring (10) has a retaining ring (12) and a locking ring (14), wherein the retaining ring (12) has a retaining ring hole (12a) with an inner profile adapted to the housing profile of the housing section (108), wherein the locking ring (14) has a locking ring hole (14a) with an inner profile adapted to the housing profile of the housing section (108) and a thickness adapted to the groove (112), wherein the retaining ring (12) and the locking ring (14) are arranged coaxially to one another and are held in the axial direction relative to one another, wherein in a basic position the retaining ring hole and the locking ring hole at least partially overlap, wherein the locking ring (14) is arranged rotatably relative to the retaining ring (12) about a central axis common to the retaining ring (12), and when arranged on the housing section (108), the locking ring (14) can be moved from the basic position relative to the retaining ring (12) into a locking position,in which the locking ring (14) engages at least with a locking portion in the groove (112), is rotatable., 8. Screwing device according to claim 7, characterized in that the locking ring hole (14a) of the locking ring (14) and the retaining ring hole (12a) of the retaining ring (12) are congruent in the basic position, wherein preferably in the basic position the inner profile of the locking ring hole (14a) of the locking ring (14) and the inner profile of the retaining ring hole (12a) of the retaining ring (12) have a shape inverse to the housing profile.

9. Screwing device according to claim 7 or 8, characterized in that the locking ring (14) can be fixed, preferably locked, in the locking position and / or in the basic position relative to the retaining ring (12).

10. Screwing device according to one of claims 7 to 9, characterized bya base ring (16) with a base ring hole (16a), wherein the locking ring (14) is fastened coaxially to the base ring (16) and can be rotated relative to the retaining ring (12) by means of the base ring (16), wherein the base ring preferably has a stop projection (18), wherein the stop projection (18) has a distance A from the locking ring (14) in the axial direction, which distance is adapted to a distance B in the axial direction of a stop surface (108b) of the housing section (108) to the groove (112) on the housing section (108).

11. Screwing device according to one of the preceding claims, characterized in thatto lock the locking ring (14) in the locking position, a locking element (20) arranged on the base ring (16) engages in a recess (22) in the retaining ring (12), wherein preferably the locking element (20) is spring-loaded in the direction of the retaining ring (12) and engages in the recess (22) in the retaining ring (12) by means of a ball (20a) or a conical body, or wherein preferably the locking element (20) is spring-loaded in the direction of the base ring (16) and is connected to a locking pin (20b) which is pulled into the recess (22) by the locking button (20).

12. Screwing device according to one of the preceding claims, characterized in that the base ring (16), locking ring (14) and / or the retaining ring (12) has embedded magnets (24).

13. Reaction force transmission element for a screwing device (100), wherein the screwing device (100) has a housing (102) with a housing section (108) extending in an axial direction and having a housing profile to which the reaction force transmission element can be positively fastened, and wherein the housing section (108) has an at least partially circumferential groove (112), with a fastening section (110) and with a retaining ring (10) according to one of claims 1 to 6.

14. Reaction force transmission element according to claim 13 characterized in that the fastening section (110) forms the retaining ring (12).

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