Electromechanical actuator
By improving the brake disc design and the electromagnet actuator, the problem of insufficient braking torque of the electromechanical drive was solved, achieving fast and reliable braking effect and improving safety and application usability.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- TRUMPF MASCHEN AUSTRIA
- Filing Date
- 2022-02-22
- Publication Date
- 2026-06-26
AI Technical Summary
Existing electromechanical drives have insufficient braking torque and braking efficiency, posing safety hazards, especially in applications requiring rapid braking.
The brake disc design includes an internal area, a friction surface area, and a middle deformable area. The braking element and the brake disc achieve rapid braking through frictional engagement. The middle area does not contact the braking element during braking and transmits braking torque through the deformable area. Combined with an electromagnet actuator, it ensures instant braking.
It achieves immediate and rapid braking, improving the reliability and safety of electromechanical drives, especially protecting operators and workpieces from errors or malfunctions when operating in hazardous areas.
Smart Images
Figure CN116888375B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to an electromechanical actuator according to the preamble of claim 1. The invention also relates to a molding machine having a pressure actuator. Background Technology
[0002] EP1524455A2 discloses a braking device in the form of an electric linear actuator in the form of a spindle drive, which includes an axially movable first clutch disc and a second clutch disc cooperating with a drive shaft via a hub. The first clutch disc presses the second clutch disc against a third clutch disc. By means of a drive coil, the first clutch disc moves to a release position, allowing the second clutch disc to rotate together with the drive shaft.
[0003] EP2333380A1 also discloses a braking device in the field of linear actuators, which has a rotating brake disc and a fixed brake disc that can move relative to the rotating brake disc and can brake the drive shaft by friction.
[0004] The drawbacks of existing technologies, particularly braking effect, especially braking torque or braking force, are too low for certain applications. The time elapsed between the actuation of the braking device and the braking action (e.g., the driver stopping or braking to the required level) is often too long. Summary of the Invention
[0005] The object of this invention is to overcome the shortcomings of the prior art and provide an electromechanical drive that enables immediate and rapid braking. Similarly, it aims to improve the efficiency of the braking action and the braking process. This is particularly useful for improving safety in applications where operators are working or operating in hazardous areas and the drive must therefore stop immediately under certain circumstances. Improvements to the braking mechanism will enhance the reliability, performance, and availability of the electromechanical drive in various applications.
[0006] This objective is achieved by an electromechanical actuator of the type mentioned at the beginning, wherein the brake disc has:
[0007] -Internal area;
[0008] - A friction surface region extending annularly around the axis of rotation, having a first friction surface formed on a first side of the brake disc; and
[0009] The intermediate region extends around the axis of rotation between the friction surface region and the inner region;
[0010] Furthermore, a first mating surface is formed on the braking element, the first mating surface facing the first friction surface and interacting with the first friction surface in the braking position.
[0011] The braking element does not rotate with the rotating component. In other words, the rotation of the braking element relative to the rotating component or the brake disc rotatably connected to the rotating component is fixed. The braking element applies braking force in the braking position through frictional engagement with the brake disc. According to the invention, the friction surface area is located radially outside the inner region and also outside the intermediate region. While the inner region can be used as an attachment region (for attachment to the rotating component), the intermediate region is preferably designed to be deformable. This is preferred when the inner and intermediate regions do not contact the braking element even in the braking position. The braking force is greatest in the outer peripheral region. On the other hand, the speed is greatest here, and the greatest braking torque can also be applied here.
[0012] The braking element can move axially from the release position to the braking position. This movement reduces the braking clearance until the braking element presses its first mating surface against the first friction surface of the brake disc.
[0013] The braking torque is transmitted to the rotating component through a region that is further in the radial direction (the inner region and the middle region).
[0014] The brake disc can fix its inner region relative to the rotating components in the axial direction. In the braking position, the braking element presses against the outer friction surface region, applying a deforming force to the brake disc. The latter is expected to bend in the axial direction.
[0015] Rotating components can be, for example, a drive shaft, a nut (e.g., in a spindle drive), a rotor (of an electric motor), or any rotating element of a transmission system.
[0016] A preferred embodiment is characterized in that the intermediate region of the brake disc does not contact the braking element in either the release or braking position, and / or in the braking position, the contact between the braking element and the brake disc is limited to the first friction surface. This ensures that frictional contact occurs only in the area of the friction surface region, while the inner and intermediate regions do not directly contact the braking element. In particular, the intermediate region can therefore have additional functionality.
[0017] A preferred embodiment is characterized in that the intermediate region is a deformable region capable of elastic deformation in the axial direction by the action of the braking element on the brake disc. Unlike known solutions, the brake disc can be axially fixed to the rotating component. A rigid connection can be provided between the brake disc and the rotating component. This increases the braking effect; in particular, the braking force is directly transmitted to the rotating component.
[0018] A preferred embodiment is characterized by notches and / or material weakening portions, preferably in the form of perforations, formed in the deformed region. The degree of deformation can be determined by the number of notches and optimized for different application areas. Alternatively, the deformed region may also be characterized by a lower material thickness compared to the internal region and / or the friction surface region.
[0019] A preferred embodiment is characterized in that the total area of the notches in the deformable region is at least as large as the total area occupied by the remaining material. This ensures sufficient deformation, especially when the friction surface area is pressed against the second mating surface in the braking position.
[0020] A preferred embodiment is characterized in that the friction surface region includes a second friction surface formed on a second side of the brake disc opposite to the first side, and wherein the friction surface region of the brake disc is disposed between a first mating surface and a second mating surface facing the second friction surface and cooperating with the second friction surface in the braking position. In the release position of the braking device, a braking gap is formed between the respective interacting surfaces. By means of a deformable intermediate region, it is well ensured that, instead of axial displacement of the brake disc relative to the rotating component, the braking gap(s) are closed over the entire surface by axial deformation of the brake disc.
[0021] A preferred embodiment is characterized in that the first mating surface is annular and / or the second mating surface is annular.
[0022] A preferred embodiment is characterized in that the friction surface region is disposed in the outer periphery of the brake disc, preferably with the first friction surface and / or the second friction surface extending to the outer edge of the brake disc. As described above, the braking effect is greatest in the outermost region of the brake disc.
[0023] A preferred embodiment is characterized in that the difference between the outer diameter and the inner diameter of the friction surface region is at most 1 / 3 of the outer diameter of the brake disc, preferably at most 1 / 4.
[0024] A preferred embodiment is characterized in that the electromechanical actuator has a housing, and a second mating surface is formed on the housing component or on an element rigidly connected to the housing component. This allows braking torque to be directly introduced into the (fixed) housing. Braking energy, given as heat, can also enter the housing, meaning that complex brake cooling is unnecessary because heat can be directly directed to the outside through the housing.
[0025] A preferred embodiment is characterized in that the internal region of the brake disc has at least one, preferably multiple, preferably annularly arranged attachment joints, preferably in the form of holes, for attaching the brake disc to the rotating component. The number of attachment joints is preferably greater than 10 and / or greater than the number of notches in the deformed region. A rigid connection between the brake disc and the rotating component is particularly preferably located here, which can be achieved, for example, by screws.
[0026] A preferred embodiment is characterized in that the first friction surface and the first mating surface are not parallel in the released position of the braking device, and / or the second friction surface and the second mating surface are not parallel in the released position of the braking device. This measure, for example, allows for reduced pressure in the portion of the friction surface region located closer to the inner side, while increasing pressure in the portion located relatively closer to the outer side. This allows for a more uniform distribution of pressure when the dimensions of the (multiple) friction or mating surfaces (or braking clearance) are properly set. This reduces wear and increases service life. These advantages can also be achieved, for example, by the following preferred embodiments.
[0027] A preferred embodiment is characterized by:
[0028] The distance between the first friction surface and the first mating surface decreases in the radial direction, and this distance is preferably at least 1 mm smaller, and more preferably at least 0.2 mm smaller at the radial outer edge of the first friction surface than at the radial inner edge of the first friction surface; and / or
[0029] The distance between the second friction surface and the second mating surface decreases in the radial direction. This distance is preferably at least 1 mm smaller at the radial outer edge of the second friction surface than at the radial inner edge of the second friction surface, and more preferably at least 0.2 mm smaller.
[0030] In the braking position, the pressure decreases in the portion of the friction surface area closer to the inner side, while increasing in the portion relatively closer to the outer side. Additionally, the brake disc, which bends axially during braking, can be adjusted to some extent.
[0031] A preferred embodiment is characterized in that, in the released position of the braking device, the first friction surface and the first mating surface are inclined toward each other; and / or
[0032] In the released position of the braking device, the second friction surface and the second mating surface are inclined toward each other.
[0033] A preferred embodiment is characterized in that the first friction surface and / or the first mating surface has a curved shape in the radial direction; and / or
[0034] The second friction surface and / or the second mating surface have a curved shape in the radial direction.
[0035] A preferred embodiment is characterized in that the internal region of the brake disc is axially fixed to the rotating component and / or the internal region of the brake disc is preferably rigidly connected to the rotating component by screws.
[0036] A preferred embodiment is characterized in that a first washer is disposed between the internal region of the brake disc and the rotating component, wherein the internal region of the brake disc is preferably constrained between the first washer and a second washer by screws. The washers (multiple washers) can be used to adjust or optimize the relative positions of the multiple friction surfaces with respect to the multiple mating surfaces. They also ensure uniform pressure distribution.
[0037] A preferred embodiment is characterized in that the electromechanical drive is a spindle drive, wherein the rotating component connected to the brake disc is configured as a nut cooperating with the spindle of the spindle drive.
[0038] A preferred embodiment is characterized in that the brake disc has a disc-shaped base body, and wherein a first friction surface and / or a second friction surface are formed by a preferably annular brake pad applied to the base body and / or protruding beyond the base body in the axial direction.
[0039] A preferred embodiment is characterized in that the braking element is biased toward the braking position. The braking position can therefore be maintained here independently of actuation or energization by a passive (spring) element.
[0040] A preferred embodiment is characterized in that the braking element is biased in the direction of the braking position by a plurality of springs arranged in a ring and preferably overlapping the first mating surface.
[0041] A preferred embodiment is characterized in that the spring is inserted into a removable housing component of the electromechanical actuator.
[0042] A preferred embodiment is characterized in that the braking device includes an actuator, preferably in the form of an electromagnet, by means of which the braking element can be moved to a release position and / or a braking position, the actuator preferably being inserted into a removable housing component of the electromechanical actuator. This variation has the advantage that, in the event of a power failure or control error, the electromagnet can be de-energized and the braking device can automatically reach the braking position.
[0043] A preferred embodiment is characterized in that the motor and braking device are housed in a common housing. This improves the immediacy of braking action because braking occurs in the proximity zone where engine torque is generated.
[0044] The objective is also achieved by a forming machine, particularly a bending machine, preferably a bending press, having at least one drive, particularly a pressure drive, for the processing motion, wherein the at least one drive is an electromechanical drive according to the invention. Such a forming machine may include a first (e.g., upper) tool holder and a second (e.g., lower) tool holder, the relative movement of which is the processing motion. The aforementioned electromechanical drive is particularly suitable for use in forming machines because the proposed braking device reacts very quickly, thus reliably protecting the operator (especially in safety-related situations involving shutdown or slowing down of the processing motion), and also "protecting" the workpiece from erroneous or malfunctioning processing procedures.
[0045] To better understand the present invention, these contents will be explained in more detail with reference to the following drawings. Attached Figure Description
[0046] These figures are shown in a very simplified schematic representation:
[0047] Figure 1 A cross-sectional view of the electromechanical drive is shown;
[0048] Figure 2 A perspective view showing a portion of the braking device;
[0049] Figure 3 A cross-sectional view of the braking device is shown;
[0050] Figure 4 Show the brake disc;
[0051] Figure 5 This illustrates the interaction between the braking elements and the brake disc;
[0052] Figure 6 The braking device is shown in the released position;
[0053] Figure 7 The braking device is shown in the released position;
[0054] Figure 8 The braking device is shown with the second braking and mating surface in the released position;
[0055] Figure 9 The braking device is shown with the second braking and mating surface in the released position;
[0056] Figure 10 A braking device with a preloaded braking element is shown;
[0057] Figure 11 A housing component is shown having a reservoir for a spring and a reservoir for an actuator;
[0058] Figure 12 A forming machine in the form of a bending press with an electromechanical drive is shown. Detailed Implementation
[0059] First, it should be noted that the same reference numerals and / or the same part names are used for the same parts in the different embodiments described, and the disclosure contained throughout the specification can be similarly transferred to the same parts having the same reference numerals and / or the same part names. Furthermore, location descriptions such as top, bottom, and side selected in the specification refer to views that are directly described and depicted, and these location descriptions should be similarly transferred to the new location if the location changes.
[0060] The example embodiments illustrate possible variations of the embodiments, and it should be noted in this regard that the invention is not limited to these specifically shown variations of its embodiments; on the contrary, various combinations of individual variations of the embodiments are also possible, and the possibility of such variations arising from the technical teachings provided by the invention is within the capabilities of those skilled in the art.
[0061] The scope of protection is defined by the claims. However, the specification and drawings are used to interpret the claims. Individual features or combinations of features derived from the different exemplary embodiments shown and described may represent independent inventive solutions. The fundamental purpose of independent inventive solutions can be obtained from the specification.
[0062] All expressions relating to numerical ranges in this specification shall be understood to include any and all local ranges derived therefrom. For example, expressions 1 to 10 shall be understood to include all local ranges based on a lower limit of 1 and an upper limit of 10, that is, all local ranges that begin at a lower limit above 1 and end at an upper limit below 10, such as 1 to 1.7, or 3.2 to 8.1, or 5.5 to 10.
[0063] Finally, in terms of form, it should be noted that, for ease of understanding of the structure, the component parts are not shown to scale and / or their dimensions are enlarged and / or reduced.
[0064] Figure 1 The electromechanical drive 1 is shown to include a motor 2 and a rotating component 3 that can be rotated about a rotation axis 4 by the motor 2. The motor has a stator 2a (e.g., in the form of a winding) mounted inside a housing 13 and a rotor 2b (e.g., in the form of a permanent magnet) directly mounted on the rotating component 3.
[0065] The electromechanical actuator 1 also includes a braking device 5 that can be driven between a braking position and a release position. The braking device 5 has a brake disc 6 that rotates together with the rotating component 3 and a braking element 7 that is adjustable in the axial direction and acts on the brake disc 6 in the braking position (see also...). Figure 2 and3 ).
[0066] Available from Figure 4 It can be seen that brake disc 6 may have:
[0067] -Internal area 8;
[0068] - A friction surface region 10 extending annularly around the axis of rotation 4, having a first friction surface 11 constructed on a first side portion of the brake disc 6; and
[0069] - The middle region 9 extends around the rotation axis 4 between the friction surface region 10 and the inner region 8.
[0070] The first mating surface 17 is constructed on the braking element 7, facing the first friction surface 11 and interacting with the first friction surface 11 in the braking position.
[0071] Preferably, the motor 2 and the braking device 5 are housed in a common housing 13.
[0072] In the preferred embodiment shown, the central region 9 of the brake disc 6 does not contact the brake element 7 in either the release or braking position. In the braking position, the contact between the brake element 7 and the brake disc 6 is limited to the first friction surface 11 (see...). Figure 2 , 7 And 9). It can also be seen, for example, in Figure 5 In this configuration, the region of the braking element 7 adjacent to the first mating surface 17 can be retracted to the rear of the mating surface 17.
[0073] exist Figure 4 In the preferred embodiment of the brake disc 6 shown, the intermediate region 9 is a deformation region that can elastically deform in the axial direction by the action of the braking element 7 on the brake disc 6 (see...). Figure 7 and 9 ).
[0074] like Figure 4 As shown, a notch 19, preferably in the form of a perforation, and / or a material weakening portion can be formed in the deformation region. Preferably, the total area of the notch 19 in the deformation region is at least as large as the total area occupied by the remaining material.
[0075] Although according to Figure 5-7 The embodiment only has a first friction surface and a mating surface, but Figure 1-3 as well as Figure 8 and 9The variation shows that the friction surface region 10 may have a second friction surface 12 constructed on a second side of the brake disc 6 opposite to the first side. The friction surface region 10 of the brake disc 6 is disposed between a first mating surface 17 and a second mating surface 18 facing the second friction surface 12 and cooperating with the second friction surface 12 in the braking position.
[0076] Brake disc 6 has a disc-shaped base body 24. A first friction surface 11 and a second friction surface 12 are each freely applied to the base body 24 and / or a preferably annular brake pad protruding in the axial direction beyond the base body 26 is formed. Figure 5-9 ).
[0077] The first mating surface 17 and the second mating surface 18 are each annular. Alternatively, multiple interrupted, segmented opposing surface regions can also be considered.
[0078] From Figure 4 It is clear that the friction surface region 10 is preferably disposed in the outer periphery of the brake disc 6. The first friction surface 11 and / or the second friction surface 12 may extend to the outer edge of the brake disc 6. The difference between the outer diameter and the inner diameter of the friction surface region 10 is preferably at most 1 / 3, and more preferably at most 1 / 4, of the outer diameter of the brake disc 6.
[0079] Figure 1 and 3 The electromechanical actuator 1 is shown to have a (multi-part) housing 13. A second mating surface 18 may be formed on the housing component 13a or on an element that is rigidly connected to the housing component 13a. In this way, braking torque and the generated frictional heat can be directly introduced into the housing.
[0080] exist Figure 4 In the illustrated embodiment, the internal region 8 of the brake disc 6 has a plurality of attachment joints 16 arranged circumferentially thereon, preferably in the form of holes, for attaching the brake disc 6 to the rotating component 3. Preferably, the number of attachment joints 16 is greater than 10 and / or greater than the number of notches 19 in the deformed region. Due to the large number of fastening joints, particularly precise adjustment of the brake disc relative to the mating surface is achieved.
[0081] exist Figure 6-9 In a variant, in the released position of the braking device 5, the first friction surface 11 and the first mating surface 17 are not aligned parallel to each other. Similarly, the second friction surface 12 and the second mating surface 18 may be not aligned parallel to each other.
[0082] Preferably, the distance between the first friction surface 11 and the first mating surface 17 decreases in the radial direction. This distance is preferably at least 1 mm smaller at the radial outer edge of the first friction surface 11 than at the radial inner edge of the first friction surface 11, and more preferably at least 0.2 mm smaller.
[0083] Similarly, the distance between the second friction surface 12 and the second mating surface 18 decreases in the radial direction, and this distance is preferably at least 1 mm smaller, and more preferably at least 0.2 mm smaller at the radial outer edge of the second friction surface 12 than at the radial inner edge of the second friction surface 12.
[0084] The friction surfaces and mating surfaces may be inclined relative to each other. The friction surfaces and mating surfaces may also have a curved shape in the radial direction.
[0085] In particular, it can be seen from Figure 1-3 As can be seen, the inner region 8 of the brake disc 6 can be axially fixed to the rotating component 3. In the illustrated embodiment, the inner region 8 of the brake disc 6 is rigidly connected to the rotating component 3. This is achieved here by means of a through-hole (attachment joint 16; see...) Figure 4 This is achieved by protruding and pressing the brake disc against the rotating component 3 with a screw.
[0086] exist Figure 3 In this embodiment, it can be seen that the first washer 14 is disposed between the inner region 8 of the brake disc 6 and the rotating component 3. The inner region 8 of the brake disc 6 is also sandwiched between the first washer 14 and the second washer 15. This is achieved by using the same screws described above to securely connect the brake disc 7 to the rotating component 3.
[0087] In the preferred embodiment shown, the electromechanical drive 1 is a spindle drive, wherein the rotating component 3 connected to the brake disc 6 is configured as a nut cooperating with the spindle 23 of the spindle drive. The lower end of the spindle 23 moves linearly downward or upward along the axis of rotation 4 when the motor is started and the nut (rotating component 3) rotates. Figure 1 ).
[0088] Preferably, the braking element 7 is biased toward the braking position. Finally, Figure 10 and 11 The braking element 7 is shown to be biased toward the braking position by a plurality of springs 21 arranged in a ring and preferably overlapping the first mating surface 17.
[0089] Spring 21 can be inserted into a removable housing component 13b of electromechanical drive 1 (e.g., in the form of a cover or front cover).
[0090] exist Figure 1-3 As can be seen from 10, the braking device 5 includes an actuator 22, preferably in the form of an electromagnet, by means of which the braking element 6 can be moved to a release position and / or a braking position. The actuator 22, which is a spring 21, can be inserted into a removable housing part 13b of the electromechanical drive 1.
[0091] at last, Figure 12A forming machine 20 in the form of a bending press is shown, having at least one drive, particularly a pressure drive, for the machining motion (of the forming tool). The drive(s) are designed as the electromechanical drive(s) 1 according to the invention. This forming machine may include a first (e.g., upper) tool holder and a second (e.g., lower) tool holder, the relative motion of which is the machining motion. The aforementioned electromechanical drive is particularly suitable for use in bending machines because the proposed braking device reacts very quickly, thus reliably protecting the operator (especially in safety-related situations involving shutdown or slowing down of the machining motion), and also "protecting" the workpiece from erroneous or malfunctioning machining procedures.
[0092] List of reference numerals
[0093] 1 Electromechanical drive
[0094] 2 motors
[0095] 2a, 2b stator, rotor
[0096] 3 Rotating components
[0097] 4. Rotation axis
[0098] 5. Braking device
[0099] 6. Brake disc
[0100] 7 Braking components
[0101] 8. Internal Area
[0102] 9. Middle Area
[0103] 10 Friction Surface Area
[0104] 11 First friction surface
[0105] 12 Second friction surface
[0106] 13. Outer shell
[0107] 13a Housing components
[0108] 13b Housing components
[0109] 14 First Washer
[0110] 15 Second Washer
[0111] 16. Attachment joint
[0112] 17 First mating surface
[0113] 18 Second mating surface
[0114] 19 gaps
[0115] 20 Molding Machine
[0116] 21 Springs
[0117] 22 Actuators
[0118] 23 Spindle
[0119] 24. Base Main Body
[0120] 25 First Tool Holder
[0121] 26 Second Tool Holder
[0122] 27 workpieces
Claims
1. An electromechanical spindle drive (1), comprising: Motor (2); A rotating component (3) is capable of rotating around a rotation axis (4) via the motor (2); as well as Braking device (5), which is capable of being driven between the braking position and the release position, The braking device (5) has a brake disc (6) that rotates together with the rotating component (3) and a braking element (7) that can be adjusted in the axial direction and act on the brake disc (6) in the braking position. The rotating component (3) connected to the brake disc (6) is configured as a nut that cooperates with the spindle (23) of the spindle drive. The brake disc (6) has the following features: Internal area (8); A friction surface region (10) extending annularly around the rotation axis (4) has a first friction surface (11) formed on a first side of the brake disc (6) and a second friction surface (12) formed on a second side of the brake disc (6) opposite to the first side; and The intermediate region (9) extends about the axis of rotation (4) between the friction surface region (10) and the inner region (8). Furthermore, a first mating surface (17) is formed on the braking element (7), the first mating surface faces the first friction surface (11) and interacts with the first friction surface (11) in the braking position. Furthermore, the friction surface region (10) of the brake disc (6) is disposed between the first mating surface (17) and the second mating surface (18) facing the second friction surface (12) and cooperating with the second friction surface (12) in the braking position. Its features are, The intermediate region (9) is a deformation region that can elastically deform in the axial direction by the action of the braking element (7) on the brake disc (6). In the release position of the braking device (5), the first friction surface (11) and the first mating surface (17) are deviated from being parallel and / or tilted toward each other. And / or, in the release position of the braking device (5), the second friction surface (12) and the second mating surface (18) are deviated from parallel alignment and / or tilted toward each other.
2. The electromechanical spindle drive according to claim 1, characterized in that, The intermediate region (9) of the brake disc (6) does not contact the brake element (7) in either the release position or the braking position, and / or in the braking position, the contact between the brake element (7) and the brake disc (6) is limited to the first friction surface (11).
3. The electromechanical spindle drive according to claim 1 or 2, characterized in that, A notch (19) and / or a material weakening portion are formed in the deformation region.
4. The electromechanical spindle drive according to claim 3, characterized in that, The notch (19) formed in the deformed area is in the form of a perforation.
5. The electromechanical spindle drive according to claim 3, characterized in that, In the deformed region, the total area of the notch (19) is at least as large as the total area occupied by the remaining material.
6. The electromechanical spindle drive according to claim 1 or 2, characterized in that, The first mating surface (17) is annular and / or the second mating surface (18) is annular.
7. The electromechanical spindle drive according to claim 1 or 2, characterized in that, The friction surface area (10) is located on the outer periphery of the brake disc (6).
8. The electromechanical spindle drive according to claim 7, characterized in that, The first friction surface (11) and / or the second friction surface (12) extend to the outer edge of the brake disc (6).
9. The electromechanical spindle drive according to claim 1 or 2, characterized in that, The difference between the outer diameter and the inner diameter of the friction surface area (10) is at most 1 / 3 of the outer diameter of the brake disc (6).
10. The electromechanical spindle drive according to claim 9, characterized in that, The difference between the outer diameter and the inner diameter of the friction surface area (10) is at most 1 / 4 of the outer diameter of the brake disc (6).
11. The electromechanical spindle drive according to claim 1 or 2, characterized in that, The electromechanical spindle drive (1) has a housing (13), and the second mating surface (18) is formed on the housing component (13a) or on an element that is securely connected to the housing component (13a).
12. The electromechanical spindle drive according to claim 3, characterized in that, The inner region (8) of the brake disc (6) has at least one attachment joint (16) for attaching the brake disc (6) to the rotating component (3).
13. The electromechanical spindle drive according to claim 12, characterized in that, The internal region (8) of the brake disc (6) has a plurality of annularly arranged attachment joints (16).
14. The electromechanical spindle drive according to claim 12, characterized in that, The attachment joint (16) is in the form of a hole.
15. The electromechanical spindle drive according to claim 12, characterized in that, The number of the attachment joints (16) is greater than 10 and / or greater than the number of the notches (19) in the deformed region.
16. The electromechanical spindle drive according to claim 1 or 2, characterized in that, The distance between the first friction surface (11) and the first mating surface (17) decreases in the radial direction.
17. The electromechanical spindle drive according to claim 16, characterized in that, The distance at the radial outer edge of the first friction surface (11) is at most 1 mm smaller than at the radial inner edge of the first friction surface (11).
18. The electromechanical spindle drive according to claim 17, characterized in that, The distance at the radial outer edge of the first friction surface (11) is at most 0.2 mm smaller than at the radial inner edge of the first friction surface (11).
19. The electromechanical spindle drive according to claim 1 or 2, characterized in that, The distance between the second friction surface (12) and the second mating surface (18) decreases in the radial direction.
20. The electromechanical spindle drive according to claim 19, characterized in that, The distance at the radial outer edge of the second friction surface (12) is at most 1 mm smaller than that at the radial inner edge of the second friction surface (12).
21. The electromechanical spindle drive according to claim 20, characterized in that, The distance at the radial outer edge of the second friction surface (12) is at most 0.2 mm smaller than at the radial inner edge of the second friction surface (12).
22. The electromechanical spindle drive according to claim 1 or 2, characterized in that, The first friction surface (11) and / or the first mating surface (17) have a curved shape in the radial direction, and / or The second friction surface (12) and / or the second mating surface (18) have a curved shape in the radial direction.
23. The electromechanical spindle drive according to claim 1 or 2, characterized in that, The inner region (8) of the brake disc (6) is axially fixed to the rotating component (3) and / or the inner region (8) of the brake disc (6) is rigidly connected to the rotating component (3).
24. The electromechanical spindle drive according to claim 1 or 2, characterized in that, The inner region (8) of the brake disc (6) is rigidly connected to the rotating component (3) by screws.
25. The electromechanical spindle drive according to claim 1 or 2, characterized in that, The first washer (14) is disposed between the inner region (8) of the brake disc (6) and the rotating component (3).
26. The electromechanical spindle drive according to claim 25, characterized in that, The inner region (8) of the brake disc (6) is constrained between the first washer (14) and the second washer (15) by screws.
27. The electromechanical spindle drive according to claim 1 or 2, characterized in that, The brake disc (6) has a disc-shaped base body (24), wherein the first friction surface (11) and / or the second friction surface (12) are formed by brake pads applied to the base body (24) and / or protruding beyond the base body (26) in the axial direction.
28. The electromechanical spindle drive according to claim 27, characterized in that, The brake pads are annular.
29. The electromechanical spindle drive according to claim 1 or 2, characterized in that, The braking element (7) is offset toward the braking position.
30. The electromechanical spindle drive according to claim 29, characterized in that, The braking element (7) is biased toward the braking position by a plurality of springs (21) arranged in a ring.
31. The electromechanical spindle drive according to claim 30, characterized in that, The plurality of springs (21) overlap with the first mating surface (17).
32. The electromechanical spindle drive according to claim 30, characterized in that, The spring (21) is inserted into the removable housing component (13b) of the electromechanical spindle drive (1).
33. The electromechanical spindle drive according to claim 1 or 2, characterized in that, The braking device (5) includes at least one actuator (22), and the brake disc (6) is capable of entering the release position and / or the braking position by means of the actuator (22).
34. The electromechanical spindle drive according to claim 33, characterized in that, The at least one actuator (22) is in the form of an electromagnet.
35. The electromechanical spindle drive according to claim 34, characterized in that, The actuator (22) is inserted into the removable housing component (13b) of the electromechanical spindle drive (1).
36. The electromechanical spindle drive according to claim 1 or 2, characterized in that, The motor (2) and the braking device (5) are housed in a common housing (13).
37. A molding machine (20) having at least one drive for processing motion, characterized in that, The at least one drive is an electromechanical spindle drive (1) according to any one of claims 1 to 36.
38. The molding machine (20) according to claim 37, characterized in that, The forming machine (20) is a bending machine.
39. The molding machine (20) according to claim 37, characterized in that, The forming machine (20) is a bending press.
40. The molding machine (20) according to claim 37, characterized in that, The actuator is a pressure actuator.