EP-4739459-A1 - SYSTEM COMPRISING A SCREW DEVICE, A NUT, AND A SCREW PART HAVING A THREADED REGION

Abstract

The invention relates to a system comprising a screw device, a nut, and a screw part having a threaded region, wherein the screw device has a housing part in which an output gearing part is rotatably mounted, wherein the output gearing part has an internal polygonal recess in which the nut is or can be accommodated, wherein the nut is interlockingly accommodated in the output gearing part in the peripheral direction relative to the rotational axis of the output gear part, wherein a movably arranged slider has a locking tab, wherein, in a first position of the slider, the locking tab is positioned below the nut in the direction of gravity, and, in a second position of the slider, the locking tab does not restrict the nut.

Inventors

• NAGEL, GERD

Assignees

• SEW-EURODRIVE GmbH & Co. KG

Dates

Publication Date

20260513

Application Date

20240603

Claims (15)

1. 1. System with screw device, nut and a screw part having a threaded area, in particular a threaded pin or bolt, wherein the screw device has a housing part in which a driven toothed part is arranged in a rotatable manner, characterized in that the driven toothed part has an internal polygonal recess, in particular a hexagonal recess, in which the nut is received or can be received, in particular wherein the nut is received in the peripheral direction in the driven toothed part in a form-fitting manner with respect to the axis of rotation of the driven toothed part, wherein a movably arranged slide has a locking tab, wherein the locking tab is arranged in a first position of the slide in the direction of gravity below the nut, in particular so that the nut is limited in the direction of gravity by the locking tab, and the locking tab does not limit the nut in a second position of the slide, in particular the vertical projection of the nut in the direction of gravity into a plane whose normal direction is aligned parallel to the direction of gravity is spaced from the vertical projection of the locking tab and/or the slider in this plane.
2. 2. Screwing device according to claim 1, characterized in that the inner polygonal recess is a hexagon socket and the nut has an outer hexagon area.
3. 3. Screwing device according to one of the preceding claims, characterized in that the nut has a collar region projecting radially towards the external hexagon region, in particular for axially limiting the nut, in particular wherein the collar region adjoins the external hexagon region, in particular wherein the axial direction is related to the axis of rotation of the driven toothed part.
4. 4. Screwing device according to one of the preceding claims, characterized in that the slide is driven by a linear actuator, in particular a pneumatic drive, which Screw device can be driven, in particular linearly and/or reciprocally moved, in particular wherein the linear actuator, in particular pneumatic drive, is fastened to the housing part and/or is supported.
5. 5. Screwing device according to one of the preceding claims, characterized in that the output gear part can be driven by a driving gear part via further gear wheels that are in engagement with one another, wherein the driving gear part can be driven by an electric motor of the screwing device, or that the output gear part can be driven by a toothed belt that can be driven by a driving gear part that is rotatably mounted in the screwing device.
6. 6. Screwing device according to one of the preceding claims, characterized in that the system has a robot arm by which the screwing device is held.
7. 7. Screw device according to one of the preceding claims, characterized in that the inner polygonal recess is formed continuously through the driven toothed part and/or through the screw device or that the inner polygonal recess is enclosed by a recess that extends through the screw device.
8. 8. Screwing device according to one of the preceding claims, characterized in that the slider is arranged to be linearly movable, wherein a linear guide is formed or attached to the housing part, which guides the slider linearly.
9. 9. Screw device according to one of the preceding claims, characterized in that a slide bracket is connected to the housing part, wherein the slide is connected by means of slide side parts to a slide block on which the linear actuator, in particular a plunger of the linear actuator, is supported, in particular wherein the slide block has a cylindrical projection which is guided in an elongated hole in the slide bracket.
10. 10. Screw device according to one of the preceding claims, characterized in that the slide bracket has a non-circular recess into which a correspondingly shaped elevation projects, in particular to achieve a play-free and precisely fitting connection between the slide bracket and the slide device.
11. 11. Screw device according to one of the preceding claims, characterized in that the slide is arranged to be rotatable relative to the housing part, wherein a rotary joint for the slide is formed or attached to the housing part.
12. 12. Screwing device according to one of the preceding claims, characterized in that the slide is screwed and/or pinned to the slide side parts and/or the slide block is screwed and/or pinned to the slide side parts.
13. 13. Screw device according to one of the preceding claims, characterized in that the slide has the locking tab and two lateral guide tabs which rest on the housing part and in particular limit and thus guide the slide in the transverse direction for linear movement, in particular wherein the guide tabs on the locking tab are bent at a vertical bending angle.
14. 14. Screwing device according to one of the preceding claims, characterized in that the slide bracket is designed as a flat stamped sheet metal part.
15. 15. Screw device according to one of the preceding claims, characterized in that the linear actuator is attached to the slide bracket.

Description

System with screw device, nut and a screw part with a threaded area Description: The invention relates to a system with a screw device, a nut and a screw part having a threaded area. It is well known that a nut can be screwed onto a threaded area using a tool. From DD 1 44222 A1 a device for providing and positioning screw elements is known. A device for automatically screwing on nuts is known from DD 2 24260 A1. The invention is therefore based on the object of further developing an automated, safe unscrewing process. According to the invention, the object is achieved in the system according to the features specified in claim 1. Important features of the invention in the system with screw device, nut and a screw part having a threaded area, in particular a threaded pin or bolt, are that the screw device has a housing part in which a driven toothed part is rotatably mounted, wherein the driven toothed part has an inner polygonal recess in which the nut is received or can be received, wherein the nut is received in the peripheral direction in a form-fitting manner in the driven toothed part with respect to the axis of rotation of the driven toothed part, wherein a movably arranged slider has a locking tab, wherein the locking tab is arranged in a first position of the slider in the direction of gravity below the nut, in particular so that the nut is delimited by the locking tab in the direction of gravity, and the locking tab does not delimit the nut in a second position of the slider, in particular so that the vertical projection of the nut in the direction of gravity into a plane whose normal direction is aligned parallel to the direction of gravity is spaced from the vertical projection of the locking tab and/or the slider into this plane. The advantage here is that the nut held in the screw device can be secured against falling out by means of the locking tab. Only when the screw connection between the nut and the threaded area begins is the locking tab pulled back, thus releasing the nut for screw connection to the threaded area. By accommodating the nut in a gear part, the externally toothed gear part can be driven by another gear, which in turn is driven by a gear that is driven directly or via other gears by an input gear part. In an advantageous embodiment, the inner polygonal recess is a hexagon socket and the nut has an outer hexagon area. The advantage here is that there is a positive connection in the circumferential direction and thus the nut can be set in rotation by the screw device. In an advantageous embodiment, the nut has a collar region that projects radially towards the external hexagon region, in particular for axially limiting the nut, in particular wherein the collar region adjoins the external hexagon region, in particular wherein the axial direction is related to the axis of rotation of the driven toothed part. The advantage here is that the nut can only be inserted up to the stop of the collar region on the front side of the driven toothed part or up to the stop of the collar region on the housing part. In an advantageous embodiment, the slide can be driven by a linear actuator, in particular a pneumatic drive, of the screw device, in particular linearly and/or reciprocally, in particular wherein the linear actuator, in particular a pneumatic drive, is attached to the housing part and/or is supported. The advantage here is that the screw device including the linear actuator can be designed to be compact. In an advantageous embodiment, the output gear part can be driven by a drive gear part via further gears that mesh with one another, wherein the drive gear part can be driven by an electric motor of the screw device. The advantage here is that the drive can be carried out with a high torque. In an advantageous embodiment, the output gear part can be driven by a toothed belt, which can be driven by an input gear part that is rotatably mounted in the screw device. The advantage here is that the drive can be carried out simply and inexpensively. In an advantageous embodiment, the system has a robot arm that holds the screwing device. The advantage here is that the nut can be screwed on in different orientations and positions. In an advantageous embodiment, the inner polygonal recess is formed continuously through the driven toothed part and/or through the screw device. In another advantageous embodiment, the inner polygonal recess is surrounded by a recess that runs through the screw device. The advantage here is that when the nut is inserted into the recess, no air cushion is built up, which makes insertion more difficult. In an advantageous embodiment, the slide is arranged to be linearly movable, with a linear guide being formed or attached to the housing part, which guides the slide linearly. It is advantageous that the slide can be guided on the housing part. In an advantageous embodiment, a slide bracket is connected to the housing part, the slide being connected by means of