Electromechanical actuator assembly for actuating brake actuator, brake assembly and vehicle

Abstract

The invention relates to an electromechanical actuator assembly (1) for actuating a brake actuator (20), comprising: an actuating mechanism (3, 6) configured to be able to convert a rotational driving movement into a translational driven movement in the direction of a first longitudinal axis (L1); and a transmission mechanism (4, 4 ', 5) operably coupled to the actuation mechanism (3, 6) to receive and transmit the translational driven motion at least in the direction of the first longitudinal axis (L1), where the transmission mechanism (4, 4', 5) comprises at least one pushing member (4, 4 ') having a pushing member pivoting portion (4c, 4c'), the pushing member pivoting portion is configured to allow tilting movement of the pushing member (4, 4 ') about a pivot axis (17) that is tilted relative to the first longitudinal axis (L1).

Description

Technical Field

[0001] The present invention relates to an electromechanical actuator assembly for actuating a brake actuator, a brake assembly including the electromechanical actuator assembly, and a vehicle including the electromechanical actuator assembly or the brake assembly. Background Art

[0002] Pneumatic brake systems are widely used for decelerating commercial vehicles. Floating caliper disc brakes are the most common basic brake solution for wheel-end brake torque application in these systems. Pneumatic actuators are attached to these calipers by simple flanges and nuts. Due to this interface, these actuators can be replaced in a modular manner, supporting system setups with different braking performances based on actuator power.

[0003] The electromechanical brake actuation principle is about to enter the commercial vehicle market. Since the vehicle suspension and axle housing as well as the brake components are already determined, the design freedom for electromechanical brake actuation is restricted.

[0004] In addition, a brake caliper or a brake member in general can be actuated by a brake actuator such as a rotating rod, where a specific contact surface or interface for receiving actuation (e.g., caused by a push rod that is part of the actuator assembly) moves along a curved trajectory during the braking action due to the rotation of the rotating rod. This may result in additional loads on the actuation mechanism. Summary of the Invention

[0005] The object of the present invention is to allow for electromechanical brake actuation with reduced load on the actuation mechanism.

[0006] This object is solved by the subject matter of the independent claims. Other aspects of the invention are defined in the dependent claims. According to the present invention, an electromechanical actuator assembly for actuating a brake actuator includes: an actuation mechanism configured to be able to convert a rotational drive motion into a translational follower motion in a direction along a first longitudinal axis; and a transmission mechanism operably coupled to the actuation mechanism to receive and transmit the translational follower motion at least in the direction of the first longitudinal axis, wherein the transmission mechanism includes at least one pushing member having a pushing member pivot portion configured to allow an inclination motion of the pushing member about a pivot axis inclined with respect to the first longitudinal axis.

[0007] For example, the actuating member can be a push rod, which is axially driven by an actuating mechanism in a first longitudinal direction to move a brake actuator, such as a brake lever, in a braking direction. The brake actuator moving in the braking direction actuates a brake or a braking member, such as a brake caliper (e.g., a floating caliper), to brake a brake disc. The brake lever as the brake actuator can rotate about a pivot axis extending in a direction that is inclined with respect to the first longitudinal axis, in particular substantially perpendicular to the first longitudinal axis but not intersecting the first longitudinal axis and thus spaced apart from the first longitudinal axis. The brake actuator and the actuating member can each include engagement interfaces configured to engage with each other such that the actuating member engages with the brake actuator during the braking movement. Since the brake actuator rotates about the pivot axis, the interface of the brake actuator moves along a curved path. Accordingly, the actuating member engaging with the brake actuator includes a pivoting portion of the actuating member to allow an inclined movement of the actuating member about a corresponding pivot axis that is inclined with respect to the first longitudinal axis, in particular substantially perpendicular to the first longitudinal axis. The pivot axis of the actuating member is preferably substantially parallel to the pivot axis of the brake actuator. Herein and hereinafter, the term "substantially" generally relates to tolerances in manufacturing and / or assembly and any other minor deviations that do not interfere with the basic principle provided by the corresponding construction.

[0008] Since the actuating mechanism is configured to be able to convert a rotational drive motion into a translational follower motion in the direction of the first longitudinal axis and the transmission mechanism is operatively coupled to the actuating mechanism to receive and transmit the translational follower motion at least in the direction of the first longitudinal axis, the actuating mechanism can be retrofitted in the brake assembly when replacing a linear drive with a rotary drive within a given brake actuator and / or brake construction. In addition, the ability of the actuating member to provide an inclined movement allows for a reduction in the load on the actuating member, which otherwise might cause deformation or other damage to the actuating member or its subsequent components in a direction away from the brake actuator, and / or deformation or other damage to the brake actuator.

[0009] In some embodiments, the actuating mechanism is a spindle-spindle nut mechanism, preferably a recirculating ball type spindle mechanism. The spindle of the spindle-spindle nut mechanism extends along the first longitudinal axis and is rotatably supported about the first longitudinal axis while being axially fixed. In addition, the spindle nut is configured to be axially movable relative to the first longitudinal axis while being fixed against rotation.

[0010] For example, the spindle-spindle nut mechanism is an actuator based on a recirculating ball spindle, wherein the spindle extends in the direction of a first longitudinal axis, preferably coaxially therewith, and is rotationally supported by at least one spindle bearing to allow rotational movement of the spindle about the first longitudinal axis or an axis parallel to the first longitudinal axis but axially stationary with respect to the direction of the first longitudinal axis. However, in other embodiments, the spindle-spindle nut mechanism can be another actuation mechanism configured to be able to convert a rotational drive movement into a translational follower movement in the direction of the first longitudinal axis, such as a threaded mechanism. The rotational movement of the spindle causes the spindle nut to move axially with respect to the first longitudinal axis. To prevent the spindle nut from rotating with the spindle and to remain rotationally stationary, the spindle nut can include at least one spindle support pin that projects radially with respect to the first longitudinal axis. The at least one pin can be received in a guide groove of a housing that houses the spindle nut, or in a guide groove of another fixed component. The guide groove extends in the axial movement direction of the spindle nut. By the axial movement of the spindle nut, the transmission mechanism also moves axially. Preferably, the electromechanical actuator assembly further includes an electromechanical linear actuator that is configured and controlled to lock the spindle to prevent its rotational movement.

[0011] For example, the electromechanical linear actuator can be configured to be able to move against the spindle to lock or brake the spindle to prevent rotational movement by providing a form-fit and / or force-fit connection. However, in other embodiments, such locking can alternatively or additionally be provided by another locking mechanism such as a pneumatic locking mechanism. By locking the spindle to prevent rotational movement, a force acting on the spindle nut in the axial direction with respect to the first longitudinal axis does not cause the spindle nut or the spindle to move.

[0012] Alternatively, an electromechanical actuator assembly for actuating a braking actuator includes: an actuation mechanism configured to be able to convert a rotational drive movement into a translational follower movement in the direction of a first longitudinal axis; and a pushing member operatively coupled to the actuation mechanism to receive and transmit the translational follower movement at least in the direction of the first longitudinal axis, wherein the actuation mechanism is a spindle-spindle nut mechanism, wherein the spindle nut of the actuation mechanism is rotatably supported about the first longitudinal axis while being axially fixed, and wherein the spindle of the actuation mechanism is configured to be axially movable with respect to the first longitudinal axis while being fixed against rotation.

[0013] For example, the push member is axially driven by an actuating mechanism in a first longitudinal direction to move a brake actuator, such as a brake lever, in a braking direction. The brake actuator moving in the braking direction actuates a brake or a braking member, such as a brake caliper (e.g., a floating caliper), to brake a brake disc. Since the main shaft cannot rotate but can be axially moved by the rotation of a main shaft nut to actuate the brake actuator through the push member, the structural and / or dynamic requirements regarding the main shaft can be reduced. The term "operably connected" or "operably coupled" means a direct or indirect connection or coupling. For example, an indirect connection or coupling may include at least one intermediate member, e.g., for bridging a distance and / or providing a flexible interface, which is disposed between the members to be operably connected or coupled. Thus, any coupling of the described push member to the main shaft can also be transferred to a coupling of the push member to at least one intermediate member, which is in turn operably coupled to the main shaft. For example, with respect to the push member being operably connected to the main shaft, the push member can be directly coupled to the main shaft through a fixing member, such as a fixed O-ring, or indirectly coupled to the main shaft through the fixing member to at least one intermediate member.

[0014] In some embodiments, wherein the main shaft nut is rotationally driven to axially move the main shaft, the main shaft - main shaft nut mechanism may further include a ball screw. For example, the main shaft - main shaft nut mechanism is an actuator based on a recirculating ball type main shaft, wherein the main shaft extends in a direction of a first longitudinal axis, preferably coaxially therewith, and can be supported by the main shaft nut for axial movement along the first longitudinal axis or an axis parallel to the first longitudinal axis but maintaining the main shaft rotationally stationary with respect to the direction of the first longitudinal axis. The rotational movement of the main shaft nut axially moves the main shaft with respect to the first longitudinal axis. To prevent the main shaft from rotating together with the main shaft nut and maintain rotational stationarity, the main shaft may include at least one main shaft support pin radially protruding with respect to the first longitudinal axis. The at least one pin may be received in a guiding groove of a housing accommodating the main shaft, or in a guiding groove of another fixed member. The guiding groove extends in the axial movement direction of the main shaft. Through the axial movement of the main shaft, the push member also moves axially.

[0015] However, in other embodiments, the main shaft - main shaft nut mechanism may also be another actuating mechanism configured to be able to convert a rotational drive motion into a translational follower motion in the direction of the first longitudinal axis, such as a threaded mechanism. Preferably, the electromechanical actuator assembly further includes an electromechanical linear actuator configured and controlled to lock the main shaft nut to prevent rotational movement.

[0016] For example, an electromechanical linear actuator can be configured to be able to move against a spindle nut to lock or brake the spindle nut against rotational movement by providing a form-fit and / or force-fit connection. However, in other embodiments, such locking can alternatively or additionally be provided by another locking mechanism such as a pneumatic locking mechanism. By locking the spindle nut against rotational movement, a force acting on the spindle in the axial direction relative to the first longitudinal axis does not cause the spindle or the spindle nut to move.

[0017] In some embodiments regarding a rotationally driven spindle nut, the spindle nut is rotationally supported about a first longitudinal axis by at least one bearing arranged on a radially outer surface of the spindle nut.

[0018] Due to the braking operation in which the pushing member engages with the braking actuator, a force is applied to the pushing member and thus to other subsequent components operatively connected to the pushing member. In particular, since the pushing member can be tilted or at least affected by a force when engaging with the braking actuator by moving along a curved trajectory by the braking actuator, a corresponding force or force component can act on the pushing member and, for example, on the spindle and subsequently on the spindle nut. Therefore, at least one bearing arranged on the radially outer surface of the spindle nut (i.e., extending at least partially around the outer radial periphery) can absorb these forces while guiding the axial movement of the guiding device. Thus, at least one bearing can be radially supported in a housing that at least partially houses the spindle nut. Due to the force absorption of at least one bearing, the corresponding force may not have sufficient influence to cause deformation or other damage.

[0019] For example, the spindle nut is rotationally supported about a first longitudinal axis by at least one spindle nut fixing bearing and at least one spindle nut loose bearing arranged on a radially outer surface of the spindle. The two bearings can be deep groove ball bearings, which are also capable of bearing axial forces. Preferably, the spindle nut fixing bearing is configured to be able to bear the axial force transmitted from the pushing member. At least one bearing (e.g., the spindle nut fixing bearing) can also be a combination of multiple bearings, such as an axial thrust ball bearing and another radial bearing of any type. In other words, at least one bearing is configured to be able to bear axial forces by providing a single bearing or a combination of bearings providing axial and radial force support.

[0020] In some embodiments regarding a rotationally driven spindle nut, in the direction of the first longitudinal axis, an end portion of the spindle includes a spindle recess, preferably having a tapered shape that tapers from an opening of the spindle recess to a closed end of the spindle recess, and the spindle recess is configured to be able to at least partially receive the pushing member, wherein the pushing member is preferably operatively connected to the spindle within the spindle recess.

[0021] Accordingly, the actuating member extends at least partially into the main shaft to allow for a more compact design in the direction of the first longitudinal axis. Due to the tapered shape of the main shaft recess, the main shaft recess can provide centering ability for the actuating member and / or can provide a predetermined tilting ability for the actuating member within the main shaft, as described later.

[0022] In some embodiments regarding a spindle nut for a rotary drive, the main shaft is supported in the direction of the first longitudinal axis above a predetermined support section by the spindle nut and / or at least one bearing member, preferably at least partially corresponding to a predetermined actuation movement of the main shaft for actuating a brake actuator, and wherein the main shaft recess extends in the direction of the first longitudinal axis such that the bending force transmission from the actuating member to the main shaft substantially occurs within the predetermined support section.

[0023] During the braking operation, the actuating member can transmit a bending force or a bending torque to the main shaft respectively. By supporting the main shaft by the spindle nut and / or at least one bearing member on the predetermined support section, the corresponding influence on the main shaft can be reduced. In particular, the predetermined support section at least partially corresponding to the predetermined actuation movement of the brake actuator for the main shaft allows the main shaft to be supported during at least part of the normal braking operation. The predetermined support section can specifically correspond to a predetermined actuation movement with an expected bending force equal to or higher than a predetermined threshold.

[0024] According to the above, the main shaft recess extends in the direction of the first longitudinal axis such that the bending force transmission from the actuating member to the main shaft substantially occurs within the predetermined support section where the main shaft is sufficiently supported.

[0025] Furthermore, as the actuating member extends further into the main shaft, for the same actuation of the brake actuator, the deflection angle of the actuating member relative to the first longitudinal axis and thus the bending force are allowed to decrease. In other words, the greater the extent to which the actuating member extends into the main shaft, the smaller the deflection angle. For example, the actuating member can extend in the direction of the first longitudinal axis within the main shaft recess at least beyond the pivot axis of the brake actuator away from the direction of the brake actuator. Alternatively or additionally, the length of the actuating member within the main shaft recess is determined such that the pivot axis of the actuating member is located within the predetermined support section, for example, between two bearings arranged axially along the spindle nut, at least under the maximum stroke force or the maximum actuator force, or within the corresponding force range exceeding a predetermined threshold acting from the actuating member on the main shaft.

[0026] In some embodiments, the main shaft is operatively connected to a drive device, preferably an electric motor, to be directly driven by the drive device or driven through at least one gear stage arranged between the drive device and the main shaft.

[0027] Accordingly, a drive device, in particular a rotary drive device, drives the main shaft to rotate for axially driving the main shaft nut. The drive device can be directly or indirectly connected to the main shaft. In this regard and in general, the term "operably connected" or "operably coupled" means a direct or indirect connection or coupling. For example, an indirect connection or coupling can include at least one intermediate member, e.g., for converting motion and / or bridging a distance, which intermediate member is arranged between the members to be operably connected or coupled. With respect to the main shaft being operably connected to the drive device, at least one gear stage can be arranged between the drive device and the main shaft. At least one gear stage can allow for converting the rotational speed of the drive device into a different rotational speed of the main shaft. Preferably, at least one gear stage is configured to be able to reduce the rotational speed of the main shaft relative to the rotational speed of the drive device. Since the drive device is or at least includes an electric motor, driving of the main shaft can be easily achieved.

[0028] In an alternative embodiment regarding the main shaft nut being rotationally driven for axially moving the main shaft, the main shaft nut is operably connected to a drive device, preferably an electric motor, for being directly driven by the drive device or driven through at least one gear stage arranged between the drive device and the main shaft nut.

[0029] Accordingly, a drive device, in particular a rotary drive device, drives the main shaft nut to rotate for axially driving the main shaft. The drive device can be directly or indirectly connected to the main shaft nut. As previously mentioned, in this regard and in general, the term "operably connected" or "operably coupled" means a direct or indirect connection or coupling. For example, an indirect connection or coupling can include at least one intermediate member, e.g., for converting motion and / or bridging a distance, which intermediate member is arranged between the members to be operably connected or coupled. With respect to the main shaft nut being operably connected to the drive device, at least one gear stage can be arranged between the drive device and the main shaft nut. At least one gear stage can allow for converting the rotational speed of the drive device into a different rotational speed of the main shaft nut. Preferably, at least one gear stage is configured to be able to reduce the rotational speed of the main shaft nut relative to the rotational speed of the drive device. Since the drive device is or at least includes an electric motor, driving of the main shaft can be easily achieved. In some embodiments, the drive device includes a drive device shaft extending in a direction along a second longitudinal axis, preferably parallel to the first longitudinal axis.

[0030] The second longitudinal axis can be coaxially aligned with the first longitudinal axis, e.g., in series with the main shaft. However, due to space limitations of the installation or in order to reduce the size of the electromechanical actuator assembly in the direction of the first longitudinal axis, the drive device shaft and thus the second longitudinal axis can be arranged to extend parallel to the first longitudinal axis. In such a configuration, the drive device shaft and the main shaft can be operably coupled through at least one gear stage, where at least one gear stage can be provided only to transfer the rotational motion of the drive device shaft to the main shaft at the same rotational speed, but alternatively can convert the rotational speed.

[0031] In some embodiments, the drive device shaft at least partially overlaps with the main shaft in the direction of the second longitudinal axis.

[0032] By at least partially overlapping the drive device shaft and the main shaft, the installation space can be reduced in the direction of the first longitudinal axis, thereby achieving a compact design in this direction. For example, the first longitudinal axis and the second longitudinal axis are arranged parallel to each other. In addition, the drive device shaft and the main shaft are arranged such that the shorter of the drive device shaft or the main shaft does not extend beyond the longer of the drive device shaft or the main shaft with respect to the first longitudinal axis or the second longitudinal axis. For the lengths of the drive device shaft and the main shaft on the respective first and second longitudinal axes to be substantially equal, it is preferred that neither the drive device shaft nor the main shaft extends beyond each other. The first longitudinal axis and the second longitudinal axis can be arranged to extend in a horizontal plane or a vertical plane during installation.

[0033] In some embodiments, the electromechanical actuator assembly further includes a locking unit, preferably an electromechanical linear actuator or a locking clutch, more preferably a bistable brake, which is configured and controlled to be able to lock the drive device shaft to prevent rotational movement.

[0034] Regarding the main shaft being rotationally driven, by locking the drive device shaft, any accidental movement of the main shaft can be prevented. Conversely, any rotational movement of the main shaft will not cause the drive device shaft operably connected to the main shaft to rotate, which may affect the drive device.

[0035] Regarding the main shaft nut being rotationally driven, by locking the drive device shaft, any accidental movement of the main shaft nut can be prevented. Conversely, any rotational movement of the main shaft nut will not cause the drive device shaft operably connected to the main shaft nut to rotate, which may affect the drive device.

[0036] The locking unit is preferably configured to be able to lock by form - fit connection.

[0037] Specifically, the locking unit is configured as a parking brake, specifically a parking brake clutch, which is coupled to the drive device shaft to lock the rotation of the drive device in a predetermined position. Preferably, the brake is pre - tensioned in the predetermined position, thereby achieving the parking brake function.

[0038] In some embodiments, the transmission mechanism includes a guiding device, which is configured to be able to at least partially accommodate and support the pivot portion of the pushing member and translate the pushing member in accordance with the follower translational movement of the actuating mechanism.

[0039] Thus, the actuating member is translated in a direction along the first longitudinal axis by a guiding device that at least partially receives and supports a pivoting portion of the actuating member to allow antilinear movement of the actuating member. For example, the guiding device may be of an annular shape, arranged around the main shaft, and providing a contact surface for the spindle nut or operatively connected to the spindle nut to axially move along the main shaft according to a corresponding axial movement of the spindle nut. In other words, the spindle nut may not have to be configured to be able to at least partially receive and support the pivoting portion of the actuating member and the corresponding translational movement, since the guiding device can be easily adapted, similarly to an adapter, to both the actuating member and the spindle nut.

[0040] In some embodiments, the guiding device includes at least one axial bearing arranged on a radially outer surface of the guiding device, the axial bearing being configured for guiding an axial movement of the guiding device relative to the first longitudinal axis.

[0041] Due to a braking operation in which the actuating member engages with a brake actuator, a force is applied to the actuating member and thus to other subsequent components operatively connected to the actuating member. In particular, since the actuating member tilts when engaging with the brake actuator by moving along a curved trajectory by the brake actuator, a corresponding force or force component may act on the actuating member and, for example, on the guiding device. In addition, the actuation of the brake by the brake actuator may cause a corresponding reaction force. Thus, specifically, an axial force may be generated. Therefore, at least one axial bearing arranged on the radially outer surface of the guiding device (i.e., at least partially extending circumferentially around the outer radius) can absorb the axial force while guiding the axial movement of the guiding device. Thus, the at least one axial bearing may be radially supported in a housing that at least partially houses the main shaft. Due to the force absorption of the at least one axial bearing, the axial force may not have sufficient effect to cause deformation or other damage to the main shaft. Thus, the main shaft design can be optimized without having to consider potential axial forces transmitted through the actuating member. In addition, an axial bearing or another bearing may also be provided for radial forces.

[0042] The present invention is not limited to a specific axial bearing. Here, any bearing capable of supporting an axial force can be understood as an axial bearing. However, a specific axial bearing may be advantageous for increasing the corresponding supporting ability.

[0043] In some embodiments, the actuating member includes an actuating member body, one end of which includes a pivoting portion of the actuating member and the opposite end includes an actuating member head, preferably a replaceable and / or at least partially spherical actuating member head, the actuating member head being configured to be able to engage with a brake actuator to correspondingly actuate the brake actuator.

[0044] Thus, the actuating member extends along an actuating member longitudinal axis from one end including the pivoting part of the actuating member to the other end including the head of the actuating member. For example, the actuating member longitudinal axis may be coaxial with the first longitudinal axis, and the actuating member body extends circumferentially around the main shaft at least partially. The pivoting part of the actuating member may thus include an opening for receiving the main shaft. In addition, the head of the actuating member may be at least partially spherical, for example a positive hemisphere, which is configured to be received by a corresponding negative hemisphere part of the brake actuator to receive the head of the actuating member for engagement. Due to the spherical interface, the contact surfaces of the positive hemisphere head of the actuating member and the negative hemisphere part of the brake actuator can slide relative to each other during movement along a curved trajectory without hindering such movement. However, the head of the actuating member is not limited to a hemispherical shape, and another shape may be provided according to the shape of the receiving part of the brake actuator to engage with the head of the actuating member. Therefore, it may be advantageous to allow the head of the actuating member to be replaced to accommodate different shapes and / or sizes.

[0045] In some embodiments, the pivoting part of the actuating member includes at least one actuating member pivot, which is configured as a cylindrical part and / or a spherical part.

[0046] For example, the actuating member pivot formed as a cylindrical part may be received in a corresponding cylindrical support, allowing the actuating member to rotate about a cylindrical axis. The cylindrical part may be formed by a cylindrical or at least a part of a cylinder that is sufficient to allow a predetermined tilting movement of the actuating member. At least one cylindrical part extends radially outward from the pivoting part of the actuating member relative to the actuating member longitudinal axis. Preferably, the pivoting part of the actuating member includes at least two actuating member pivots as cylindrical parts, which are evenly distributed along the radial surface of the pivoting part of the actuating member relative to the actuating member longitudinal axis. Due to at least two actuating member pivots as cylindrical parts, the actuating member can be more stably supported.

[0047] Alternatively or additionally, the actuating member pivot may include a spherical part forming a ball-and-socket joint or at least a part of a ball-and-socket joint. Thus, the spherical part may be only partially spherical. Due to the ball-and-socket joint or the part of the ball-and-socket joint, the degree of freedom of tilting movement can be increased. In particular, the actuating member can thus rotate in any direction as long as it does not interfere with other components. The spherical part is formed with the actuating member longitudinal axis as the axis of symmetry.

[0048] In some embodiments, the guiding device as described above and / or the spindle nut as described above are configured to be able to accommodate and support at least one actuating member pivot for the tilting movement of the actuating member.

[0049] Thus, the guiding device and / or the spindle nut may include at least one actuating member pivot receiving part, such as a recess or another corresponding profile, to receive and support at least one actuating member pivot.

[0050] In some embodiments, the guiding device includes a first guiding device member and a second guiding device member, wherein the first guiding device member and the second guiding device member are connectable to each other to support at least one pusher pivot for the tilting movement of the pusher member.

[0051] Accordingly, the pusher receiving portion may be formed by connecting the first guiding device member and the second guiding device member. For example, the second guiding device member may include a cylindrical pin extending radially outward relative to the longitudinal axis of the pusher member, and the pusher pivot is formed as a semi-cylindrical arc, the inner contour of which corresponds to the outer contour of the cylindrical pin. The semi-cylindrical arc is placed on the cylindrical pin, and the first guiding member is connected to the second guiding device member. The first guiding device member may include at least one first guiding device member recess extending axially along the outer circumference, wherein the closed end of the first guiding device member recess provides a contour corresponding to the outer contour of the semi-cylindrical arc. The first and second guiding device members are configured and connected such that the semi-cylindrical arc of the pusher pivot is clamped between the cylindrical pin of the second guiding device member and the closed end of the first guiding device member. This allows for simplified assembly.

[0052] Furthermore, dividing the guiding device into at least a first guiding device member and a second guiding device member also allows for the replacement of the pusher member and / or adaptation to different pusher members.

[0053] Alternatively or additionally, the pusher pivot is held in the pusher receiving portion of one of the first and second guiding device members by connecting the other of the first and second guiding device members to one of the first and second guiding device members.

[0054] In some embodiments, the electromechanical actuator assembly further includes at least one control device, preferably at least one electronic control unit.

[0055] In some embodiments, the drive device shaft and the main shaft extend substantially in a plane, and at least one control device, preferably at least one electronic control device, is arranged laterally to the plane and operatively connected to the drive device and / or the locking unit as described above.

[0056] Accordingly, the control device is placed laterally on the electromechanical actuator assembly. This allows for a further reduction in the installation space in the direction of the first longitudinal axis.

[0057] In some embodiments, the electromechanical actuator assembly includes at least two control devices arranged on opposite sides of a plane.

[0058] For example, the control device can thus form a control unit divided into two parts. The control device can be arranged such that the electromechanical actuator assembly remains quasi-symmetrical. Preferably, the symmetry plane of the arrangement of the control device corresponds to the symmetry plane of the brake caliper. The symmetry plane of the brake caliper is a plane extending substantially perpendicular to the braking surface of the brake caliper or the symmetry plane of the braking plane.

[0059] In some embodiments, at least one of the at least two control devices is a control unit configured to be able to control an operatively connected component, and at least one other of the at least two control devices is a power control unit configured to be able to control the power supply to an operatively connected component.

[0060] Thus, in the event of any failure of one of the at least two control devices, redundancy providing a corresponding backup function can be more easily achieved by separating the types of functions to be allocated to one control device or the other.

[0061] According to another aspect, the present invention relates to a braking assembly, comprising: at least one electromechanical actuator assembly as described above; and at least one brake actuator configured to be able to actuate or release a brake when actuated by the electromechanical actuator assembly.

[0062] As described above, at least one brake actuator can be a brake lever pivoting about a pivot axis inclined with respect to a first longitudinal axis, preferably substantially perpendicular to the first longitudinal axis.

[0063] In some embodiments, the braking assembly further comprises a brake caliper actuable by at least one brake actuator, wherein the at least one brake caliper provides a braking plane extending substantially perpendicular to the braking movement, and wherein the at least one electromechanical actuator assembly is arranged such that the first longitudinal axis is substantially perpendicular to the braking plane, preferably within the symmetry plane of the brake caliper, and wherein the at least one brake actuator is arranged between the at least one electromechanical actuator assembly and the brake caliper. The braking plane corresponds to the plane in which the braking surface of the brake caliper extends. Any feature described with respect to the electromechanical actuator assembly also applies to the braking assembly. Conversely, any feature described for the braking assembly also applies to the electromechanical actuator assembly.

[0064] According to another aspect, the present invention relates to a vehicle comprising at least one electromechanical actuator assembly as described above and / or a braking assembly as described above, wherein the vehicle is a commercial vehicle and / or an electric or hybrid vehicle.

[0065] For example, a commercial vehicle can be a truck, a trailer, a bus and / or a combination of a tractor and a trailer. Commercial vehicles and electric or hybrid vehicles present strict installation space limitations, which benefit from the electromechanical actuator assembly and / or the braking assembly as described above.

[0066] Other advantages, aspects, and details of the present invention are set forth in the claims, the following description of exemplary embodiments applying the principles of the present invention, and the corresponding exemplary drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0067] Figure 1 is a schematic cross-sectional top view of a brake assembly and an electromechanical actuator assembly according to an exemplary embodiment of the present invention;

[0068] Figure 2 is a schematic side view of a push member according to an exemplary embodiment of the present invention;

[0069] Figure 3 is according to Figure 2 a schematic top view of the push member;

[0070] Figure 4 is a schematic side view of a guiding device according to an exemplary embodiment of the present invention;

[0071] Figure 5 is a schematic cross-sectional top view of a push member according to another exemplary embodiment of the present invention;

[0072] Figure 6 is a schematic rear view of a brake assembly according to an exemplary embodiment of the present invention; and

[0073] Figure 7 is a schematic cross-sectional side view of a brake assembly and an electromechanical actuator assembly according to another exemplary embodiment of the present invention. DETAILED DESCRIPTION

[0074] Figure 1 FIG. shows a schematic cross-sectional top view of a brake assembly 100 and an electromechanical actuator assembly 1 according to an exemplary embodiment of the present invention. In Figure 1 , only the electromechanical actuator assembly 1 and a brake lever 20 as an exemplary brake actuator are shown, which are included by the brake assembly 100. However, the brake assembly may also include other components, such as a brake caliper 60 ( Figure 6 ).

[0075] The electromechanical actuator assembly 1 includes a spindle 3 and a spindle nut 6, which are configured as a recirculating ball spindle mechanism, as an exemplary embodiment of an actuator mechanism configured to be able to convert a rotational drive motion into a translational follower motion in the direction of a first longitudinal axis L1. The first longitudinal axis L1 corresponds to the longitudinal axis of the spindle 3. The spindle 3 is driven by an electric motor 2 as a drive device, and the drive device includes a motor shaft 10 as a drive device shaft. The motor shaft 10 extends in the direction of a second longitudinal axis L2. The first longitudinal axis L1 is parallel to the second longitudinal axis L2. In addition, the motor shaft 10 and the spindle 3 arranged parallel to each other are positioned such that one end of the shorter motor drive shaft 10 does not extend beyond the spindle 3, so as to achieve a compact design in the direction of the first longitudinal axis L1 or the second longitudinal axis L2. In principle, for a compact design, the motor shaft 10 and the spindle 3 are preferably arranged to require a minimum amount of space in the direction of the first longitudinal axis L1 or the second longitudinal axis L2. In order to drive the spindle 3 by the electric motor 2, the motor shaft 10 includes a drive gear 13 that extends radially with respect to the second longitudinal axis L2, and the spindle 3 includes a driven gear 14 that extends radially with respect to the first longitudinal axis L1. The drive gear 13 and the driven gear 14 are respectively positioned along the motor shaft 10 and the spindle 3 such that they engage with each other to form a gear stage. In the exemplary embodiment, the gear stage is configured to be able to convert the rotational speed of the motor shaft 10 into a lower rotational speed of the spindle.

[0076] The electric motor 2 and the motor shaft 10 are accommodated in a housing 18. The motor shaft 10 is rotatably supported in the housing 18 by motor shaft bearings 11a, 11b, and each motor shaft bearing is respectively arranged at one end of the motor shaft 10. In addition, the motor shaft 10 can be locked by a bistable brake 9 as a locking unit to prevent rotational motion.

[0077] The spindle 3 is also accommodated in the housing 18 and is rotatably supported by a spindle bearing 12 and a spindle support bearing 15. The bearings 12, 15 are configured to be able to allow the spindle 3 to rotate, but prevent axial movement of the spindle 3 with respect to the first longitudinal axis L1. Although the spindle bearing 12 directly supports the spindle 3 at the driven end in the housing 18, the spindle support bearing 15 requires a fixed spindle support bearing support 16, here, to bridge the distance between the housing 18 and the spindle support bearing 15 in a direction perpendicular to the drawing plane.

[0078] The spindle nut 6 is configured to be able to axially move relative to the spindle 3 along the first longitudinal axis L1. In order to prevent rotational motion of the spindle nut 6, the spindle nut 6 includes two support pins 7a, 7b, which extend radially outward from the spindle nut 6 in opposite directions with respect to the first longitudinal axis L1. The support pins 7a, 7b extend into corresponding guide grooves 19 to guide the support pins 7a, 7b in the axial movement direction, thereby guiding the spindle nut 6 while preventing rotational motion of the spindle nut 6.

[0079] The electromechanical actuator assembly 1 further includes a push member 4 and a guide device 5 as a transmission mechanism to receive and transmit the translational follower movement of the spindle nut 6 at least in the direction of the first longitudinal axis L1. In the downstream direction from the driven end of the spindle 3 towards the opposite end of the spindle 3, the guide device is arranged downstream of the spindle nut 6. The guide device forms an annular member extending around the spindle 3 and supports the push member 4 which is tiltably connected to the guide device 5 to pivot about a pivot axis 17. The pivot axis 17 is perpendicular to the first longitudinal axis L1 and intersects the first longitudinal axis L1. The push member 4 projects from the guide device 5 in the downstream direction.

[0080] The push member 4 is intended to engage with the brake lever 20 of the brake assembly 100. In a cross-sectional top view, Figure 1 a receiving portion formed in a spherical shape of the brake lever 20 is shown. The brake lever 20 extends in the drawing plane and is pivotable about a pivot axis 21 which is perpendicular to the first longitudinal axis L1 and parallel to the pivot axis 17 of the push member 4. Although Figure 1 it may give the impression that the pivot axis 21 intersects the first longitudinal axis L1, this is only due to the two-dimensional illustration, and the pivot axis 21 actually extends in a plane below the first longitudinal axis L1 with respect to the drawing plane.

[0081] The guide device 5 is supported in the housing 18 by two axial bearings 8a, 8b which are arranged at the outer periphery of the guide device 5 to extend radially around the guide device 5 with respect to the first longitudinal axis L1.

[0082] For the braking operation, the motor 2 drives the spindle 3 to rotate through the motor shaft 10 and the gear stages 13, 14. Thus, the spindle nut 6 translates in the downstream axial direction with respect to the first longitudinal axis L1. Thereby, the guide device 5 and thus the push member 4 are also moved by the spindle nut 6 in the downstream axial direction. Due to the downstream axial movement, the push member 4 engages the brake lever 20. When the push member 4 moves further in the downstream axial direction, the brake lever 20 pivots about the pivot axis 21, so that the contact surface between the brake lever 20 and the push member 4 follows a curved trajectory, wherein the push member 4 tilts about the pivot axis 17.

[0083] Figure 2A schematic side view of a pushing member 4 according to an exemplary embodiment of the present invention is shown. The pushing member 4 includes a pushing member body 4b that extends in a longitudinal direction from a pushing member head 4a to an opposite pushing member pivot portion 4c. In the assembled state of the electromechanical actuator assembly 1, the longitudinal axis of the pushing member body 4b can be coaxial with the first longitudinal axis L1. The pushing member head 4a provides a shape and outer contour corresponding to the receiving portion of the brake lever 20, which is a spherical shape here, specifically a hemispherical shape. Since the contour of the receiving portion of the brake lever 20 may change in shape and / or contour in different brake assemblies and / or due to other reasons for replacing the pushing member head 4a, the pushing member head 4a according to the present embodiment is releasably attached to the pushing member body 4b. However, in other embodiments, the pushing member head 4a can be integrally formed with the pushing member body 4b. For releasable attachment, the pushing member head 4a is screwed onto the pushing member body 4b. In other embodiments, the pushing member head 4a can be clamped onto the pushing member body 4b, or can be releasably attached by any other form-fitting and / or force-fitting connection.

[0084] The pushing member pivot portion 4c includes two pushing member pivots 41c to form a pivot that allows the pushing member 4 to tilt about a pivot axis 17. In the exemplary embodiment, the pushing member pivots 41c are formed as cylindrical portions, specifically cylindrical arc segments. According to the side view, only one of the pushing member pivots 41c is visible in Figure 2 However, the other pushing member pivot 41c is opposite to the visible pushing member pivot 41c. The pushing member pivot portion 4c further includes two pushing member pivot recesses 42c, which are configured to allow a predetermined tilt without interfering with another component. In the exemplary embodiment, the pushing member pivot recesses 42c are formed by semi-circular cutouts in the pushing member pivot portion 4c. The pushing member pivot recesses 42c are radially offset from the pushing member pivots 41c by 90° with respect to the longitudinal axis. In other embodiments, the offset can be different from 90°.

[0085] Figure 3 A schematic top view of a pushing member according to Figure 2 is shown.

[0086] According to the top view, the pushing member 4 further includes a pushing member opening 4d. According to the exemplary embodiment, the pushing member 4 is formed to allow the main shaft 3 to at least partially extend into the internal space of the pushing member 4. In addition, the pushing member 4 can move axially relative to the main shaft 3. In order to support the main shaft 3 by the main shaft support bearing 15, the pushing member opening 4d allows the main shaft support bearing support 16 to extend into the internal space of the pushing member 4 to support the main shaft support bearing 15.

[0087] Figure 4A schematic side view of a guiding device 5 according to an exemplary embodiment of the present invention is shown. The guiding device 5 includes a first guiding device member 5a and a second guiding device member 5b. Each of the first and second guiding device members is substantially formed in a hollow cylindrical shape, the inner diameter of which allows the main shaft 3 to extend therethrough. In the exemplary embodiment, the first and second guiding device members 5a, 5b are configured to be able to accommodate and support a pushing member 4 according to Figure 2 and 3 . The first guiding device member 5a includes two opposite first guiding device member recesses 51a which, when assembled, extend in the direction of a first longitudinal axis L1. One end of the first guiding device member recess 51a is open, while its closed end is formed in a hemispherical shape to correspond to the outer contour of the cylindrical pushing member pivot 41c. The second guiding device member 5b includes two radially outwardly projecting second guiding device member pivots 51b which are opposite to each other. The second guiding device member pivot 51b is provided as a cylindrical pin, the outer diameter of which corresponds to the inner contour of the cylindrical pushing member pivot 41c. The second guiding device member further includes a radially outwardly projecting edge as a second guiding device member abutment 52b to allow the first guiding device member 51 to abut against the second guiding device member abutment 52b when connected to the second guiding device member 5b in a final position. Thus, the cylindrical pushing member pivot 41c according to Figure 2 is allowed to be clamped between the second guiding device member pivot 51b and the first guiding device member recess 51a in the connected state of the first and second guiding device members 5a, 5b.

[0088] Figure 5 A schematic cross-sectional top view of a pushing member 4' according to another exemplary embodiment of the present invention is shown. The description of the features of the embodiment according to Figure 2 and 3 also applies herein to the pushing member head 4a', the pushing member body 4b' and the pushing member opening 4d'. However, according to Figure 5This embodiment is different in the pivoting part 4c' of the actuating member. The actuating member pivoting part 4c' includes an actuating member pivot 41c', which is formed as a spherical part forming a ball-and-socket joint or at least a ball-and-socket joint part. The spherical part is formed with the longitudinal axis of the actuating member as the axis of symmetry. The actuating member pivot 41c' is releasably attached to the actuating member pivoting part 4c'. The actuating member pivoting part 4c' further includes an actuating member abutment 43c' formed as an edge radially protruding outward relative to the longitudinal axis of the actuating member 4'. The spring member 4e' of the actuating member is configured to be arranged between the abutment and the radially extending edge of another opposing support member, here the guiding device, in which the actuating member 4' is at least partially received. Thus, the actuating member pivot 41c' is biased in the longitudinal direction of the actuating member 4' to contact the support surface of the guiding device or the spindle nut 6 for an inclined movement along the support surface.

[0089] Figure 6 Fig. shows a schematic rear view of a brake assembly 100' according to an exemplary embodiment of the present invention. In addition to the electro-mechanical actuator assembly 1 already described previously and the brake lever 20 not visible in this view, the brake assembly 100' further includes a brake caliper 60. In the exemplary embodiment, the brake caliper 60 is a floating caliper, which is configured to be actuated by a brake lever 20 arranged between the electro-mechanical actuator assembly 1 and the brake caliper 60. The braking surface of the brake caliper 60 extends in a plane substantially perpendicular to the first longitudinal axis L1. Further, in the exemplary embodiment, the electro-mechanical actuator assembly 1 includes two electronic control units 30a, 30b as control means. The electronic control units 30a, 30b are attached to opposite lateral sides of the housing 18. The lateral sides of the housing extend in a plane lateral to the plane including the first longitudinal axis L1 and the second longitudinal axis L2. One electronic control unit 30a is a control unit configured to be able to control the operatively connected components of the electro-mechanical actuator assembly 1, while the other electronic control unit 30b is a power control unit configured to be able to control the power supply to the operatively connected components of the electro-mechanical actuator assembly 1. In the brake assembly 100', the electro-mechanical actuator assembly 1 is arranged such that the first longitudinal axis L1 and the second longitudinal axis L2 are oriented in a vertical plane.

[0090] Figure 7 Fig. shows a schematic cross-sectional side view of a brake assembly 100" and an electro-mechanical actuator assembly 1" according to another exemplary embodiment of the present invention. The brake assembly 100" is different from Figure 1 the brake assembly 100 in that the spindle nut is rotationally driven instead of the spindle, and the actuating member 4" is partially arranged within the spindle 3".

[0091] Similar to Figure 1In an embodiment, the electromechanical actuator assembly 1 includes a spindle 3" and a spindle nut 6", which are configured as a recirculating ball spindle mechanism and serve as an exemplary embodiment of an actuating mechanism configured to convert a rotational drive motion into a translational follower motion in the direction of a first longitudinal axis L1. The first longitudinal axis L1 corresponds to the longitudinal axis of the spindle 3". Here, the spindle nut 6" is driven by an electric motor 2" serving as a drive device, and the drive device includes a motor shaft 10" serving as a drive device shaft. The motor shaft 10" extends in the direction of a second longitudinal axis L2. The first longitudinal axis L1 is parallel to the second longitudinal axis L2. In addition, the motor shaft 10" and the spindle 3" arranged parallel to each other are positioned such that one end of the shorter motor drive shaft 10" does not extend beyond the spindle 3" in at least one relative position, so as to achieve a compact design in the direction of the first longitudinal axis L1 or the second longitudinal axis L2. In principle, for a compact design, the motor shaft 10" and the spindle 3" are preferably arranged to require a minimum amount of space in the direction of the first longitudinal axis L1 or the second longitudinal axis L2. To drive the spindle nut 6" by the electric motor 2", the motor shaft 10" includes a drive gear 13" extending radially with respect to the second longitudinal axis L2, and the spindle nut 6" includes a driven gear 14" extending radially with respect to the first longitudinal axis L1. The drive gear 13" and the driven gear 14" are respectively positioned along the motor shaft 10" and the spindle nut 6" such that they engage with each other to form a gear stage. In the exemplary embodiment, the gear stage is configured to be able to convert the rotational speed of the motor shaft 10" into a lower rotational speed of the spindle nut 6".

[0092] The electric motor 2" and the motor shaft 10" are accommodated in a housing 18". The motor shaft 10" is rotatably supported in the housing 18" by motor shaft bearings 11a", 11b", and each motor shaft bearing is respectively arranged at one end of the motor shaft 10". In addition, the motor shaft 10" can be locked against rotational motion by a bistable brake 9" serving as a locking unit.

[0093] The spindle nut 6" is also accommodated in the housing 18" and is rotatably supported by a spindle nut fixed bearing 6c" and a spindle nut loose bearing 6d". The spindle nut fixed bearing 6c" is configured to allow the spindle nut 6" to rotate but prevent the axial movement of the spindle nut 6" with respect to the first longitudinal axis L1. In the exemplary embodiment, the spindle nut loose bearing 6d" provides further support to rotate the spindle nut 6" to a stable position.

[0094] In addition, two radial seals 7a, 7b are circumferentially arranged around the main shaft 6. The radial seals 6a", 6b" are arranged at opposite ends of the main shaft nut 6" in the direction of the first longitudinal axis L1, wherein the space of the housing in which the main shaft nut fixed bearing 6c", the main shaft nut loose bearing 6d", the driven gear 14", the driving gear 13", the motor shaft 10" and the motor 2" are sealed is therebetween.

[0095] The main shaft 3" is configured to be axially movable relative to the first longitudinal axis L1 through the main shaft nut 6". To prevent rotational movement of the main shaft 3", the main shaft nut includes support pins (not shown) that radially extend outwardly in opposite directions from the main shaft 3" relative to the first longitudinal axis L1. The support pins extend into corresponding guide slots (not shown) to guide the support pins in the axial movement direction, thereby guiding the main shaft 3" while preventing rotational movement of the main shaft 3". Two slide arms 6e", 6f" are arranged at opposite ends of the main shaft nut in the direction of the first longitudinal axis L1. Each of the two slide arms 6e", 6f" circumferentially extends between the inner diameter of the main shaft nut 6" and the outer diameter of the main shaft 3". The main shaft 3" includes a main shaft recess 3a" having a tapered shape. However, in other embodiments, the main shaft recess 3a" may be of a different shape, such as the shape of a triangular slit or the shape of a rectangular volume. In the exemplary embodiment, the tapered shape of the main shaft recess 3a" provides an opening at the end of the main shaft 3" facing the brake lever 20, while the main shaft recess 3a" tapers towards a closed end away from the brake lever 20 in the direction of the first longitudinal axis L1. The push member 4" is partially received within the main shaft recess 3a" and is fixed to the main shaft recess 3a" by a fixing member 4f" (here a fixed O-ring). The push member 4" extends substantially in the direction of the first longitudinal axis L1 and is tiltable about a pivot axis 17 that is substantially perpendicular to the first longitudinal axis L1 and parallel to the pivot axis 21 of the brake lever 20. The push member 4" provides a spherical-shaped end at the end away from the brake lever 20. The spherical-shaped end corresponds to the contour of the closed end of the main shaft recess 3a". Thus, the push member 4" is fixed to the main shaft 3" within the main shaft recess 3a" by the fixing member 5" such that the push member 4" is allowed to tilt about the pivot axis 17, wherein the spherical-shaped end of the push member 4" slides in a guiding manner along the corresponding contour of the closed end of the main shaft recess 3a". The tilting movement or deflection of the push member 4" relative to the first longitudinal axis L1 is restricted by a circumferential wall having a tapered shape that extends from the closed end of the main shaft recess 3a" to the opening of the main shaft recess 3a".

[0096] For a braking operation, the electric motor 2" drives the spindle nut 6" to rotate via the motor shaft 10" and the gear stages 13", 14". Accordingly, the spindle 3" translates in a direction along the first longitudinal axis L1 towards the brake lever 20. Thus, the pushing member 4" operatively coupled to the spindle 3" moves towards the brake lever 20. The end of the pushing member 4" facing the brake lever 20 engages the brake lever 20, and as the pushing member 4" further moves in the direction of the first longitudinal axis L1, the brake lever 20 rotates about the pivot axis 21. The end of the pushing member 4" for engaging with the brake lever 20 provides a spherical-shaped portion corresponding to the concave portion of the spherical shape of the brake lever 20. Since the brake lever 20 pivots about the pivot axis 21 in response to being driven by the pushing member 4", the concave portion of the spherical shape of the brake lever 20 follows a curved trajectory. Since the pushing member 4" can be tilted about the pivot axis 17, the pushing member is allowed to follow the curved trajectory of the brake lever 20.

[0097] To reduce the bending force on the spindle 3" that may occur during the braking operation due to the engagement of the pushing member 4" with the brake lever 20 and the corresponding reaction force, the pushing member 4" and the pivot axis 17 of the pushing member 4" respectively extend deeply into the spindle 3" according to the respective lengths of the spindle recess 3a" in the direction of the first longitudinal axis L1. Further, to provide sufficient support for the spindle 3" against the occurring bending force, the closed end of the spindle recess 3a" and the pivot axis 17 of the pushing member 4" are respectively positioned such that they move between the spindle nut fixed bearing 6c" and the spindle nut loose bearing 6d" during the braking operation.

[0098] The present invention has been described with respect to an exemplary embodiment.

[0099] However, the present invention is not limited to the exemplary embodiment.

[0100] List of reference numerals

[0101] 1, 1" Electromechanical actuator assembly

[0102] 2, 2" Electric motor (drive device)

[0103] 3, 3" Spindle

[0104] 3a" Spindle recess

[0105] 4, 4', 4" Pushing member

[0106] 4a, 4a' Pushing member head

[0107] 4b, 4b' Pushing member body

[0108] 4c, 4c' Pushing member pivot portion

[0109] 4d, 4d' Driving member opening

[0110] 4e' Spring member

[0111] 4f" Fixed member

[0112] 5 Guide device

[0113] 5a First guide device member

[0114] 5b Second guide device member

[0115] 6, 6" Spindle nut

[0116] 6a", 6b" Radial seal

[0117] 6c" Spindle nut fixed bearing

[0118] 6d" Spindle nut loose bearing

[0119] 6e", 6f" Wiper

[0120] 7a, 7b Support pin

[0121] 8a, 8b Axial bearing

[0122] 9, 9" Bistable brake (locking unit) 10, 10" Motor shaft (drive device shaft) 11a, 11b, 11a", 11b" Motor shaft bearing

[0123] 12 Spindle bearing

[0124] 13, 13" Driving gear

[0125] 14, 14" Driven gear

[0126] 15 Spindle support bearing

[0127] 16 Spindle support bearing support

[0128] 17 Pivot axis

[0129] 18, 18" Housing

[0130] 19 Guide groove

[0131] 20 Brake lever (brake actuator)

[0132] 21 Pivot axis

[0133] 30a, 30b Electronic control unit (control device)

[0134] 41c, 41c' Driving member pivot

[0135] 42c Pushing member pivot recess

[0136] 43c' Pushing member abutting portion

[0137] 51a First guiding device member recess

[0138] 51b Second guiding device member pivot

[0139] 52b Second guiding device member abutting portion

[0140] 60 Brake caliper

[0141] 100, 100', 100" Brake assembly

[0142] L1 First longitudinal axis

[0143] L2 Second longitudinal axis

Claims

1. An electromechanical actuator assembly (1, 1") for actuating a brake actuator (20), comprising: An actuation mechanism (3, 3", 6, 6") configured to be able to convert a rotational drive movement into a translational follower movement in the direction of a first longitudinal axis (L1); And A transmission mechanism (4, 4', 4", 5) operatively coupled to the actuation mechanism (3, 3", 6, 6") to receive and transmit the translational follower movement at least in the direction of the first longitudinal axis (L1), Wherein the transmission mechanism (4, 4', 4", 5) includes at least one push member (4, 4', 4") having a push member pivot portion (4c, 4c') configured to be able to allow an inclination movement of the push member (4, 4', 4") about a pivot axis (17) inclined with respect to the first longitudinal axis (L1).

2. The electromechanical actuator assembly (1) according to claim 1, wherein, The actuation mechanism (3, 6) is a spindle-spindle nut mechanism, preferably a recirculating ball type spindle mechanism, wherein the spindle (3) of the spindle-spindle nut mechanism extends along the first longitudinal axis (L1) and is rotatably supported about the first longitudinal axis (L1) while being axially fixed, and the spindle nut (6) is configured to be able to axially move with respect to the first longitudinal axis (L1) while being fixed against rotation, wherein the electromechanical actuator assembly (1) preferably further includes an electromechanical linear actuator configured and controlled to be able to lock the spindle (3) against its rotational movement.

3. The electromechanical actuator assembly (1) according to claim 2, wherein, The spindle (3) is operatively connected to a drive device (2), preferably an electric motor, to be directly driven by the drive device (2) or driven through at least one gear stage (13, 14) disposed between the drive device (2) and the spindle (3).

4. The electromechanical actuator assembly (1) according to claim 3, wherein, The drive device (2) includes a drive device shaft (10) extending in the direction of a second longitudinal axis (L2), preferably parallel to the first longitudinal axis (L1).

5. The electromechanical actuator assembly (1) according to claim 4, wherein, The drive device shaft (10) at least partially overlaps the spindle (3) in the direction of the second longitudinal axis (L2).

6. The electromechanical actuator assembly (1) according to claim 4 or 5, wherein, The electromechanical actuator assembly (1) further includes a locking unit (9), preferably an electromechanical linear actuator or a locking clutch, more preferably a bistable brake, configured and controlled to be able to lock the drive device shaft (10) against its rotational movement.

7. The electromechanical actuator assembly (1) according to any one of the preceding claims, wherein, The transmission mechanism (4, 4', 5) includes a guiding device (5) configured to be able to at least partially receive and support the push member pivot portion (4c, 4c') and translate the push member (4, 4') in accordance with the follower translational movement from the actuation mechanism (3, 6).

8. The electromechanical actuator assembly (1) according to claim 7, wherein, The guiding device (5) includes at least one axial bearing (8a, 8b) disposed at a radially outer surface of the guiding device (5), the at least one axial bearing being configured for guiding the axial movement of the guiding device (5) with respect to the first longitudinal axis (L1).

9. The electromechanical actuator assembly (1, 1") according to any one of the preceding claims, wherein, The actuating member (4, 4', 4") includes an actuating member body (4b, 4b'), the actuating member body including at one end the actuating member pivot portion (4c, 4c') and at the opposite end an actuating member head (4a, 4a'), preferably a replaceable and / or at least partially spherical actuating member head (4a, 4a'), the actuating member head being configured to be able to engage with a brake actuator (20) to accordingly actuate the brake actuator (20).

10. The electromechanical actuator assembly (1, 1") according to any one of the preceding claims, wherein, The actuating member pivot portion (4c, 4c') includes at least one actuating member pivot (41c, 41c'), the actuating member pivot being configured as a cylindrical portion (41c) and / or a spherical portion (41c').

11. The electromechanical actuator assembly (1) according to claim 10, wherein, The guiding device (5) according to claim 7 or 8 and / or the spindle nut (6) according to claim 2 are configured to be able to receive and support the at least one actuating member pivot (41c, 41c') for the tilting movement of the actuating member (4, 4').

12. The electromechanical actuator assembly (1) according to claim 10 or 11, wherein, The guiding device (5) includes a first guiding device member (5a) and a second guiding device member (5b), the first guiding device member (5a) and the second guiding device member (5b) being able to be connected to each other to support the at least one actuating member pivot (41c, 41c') for the tilting movement of the actuating member (4, 4').

13. The electromechanical actuator assembly (1, 1") according to any one of the preceding claims, wherein, The electromechanical actuator assembly (1) further includes at least one control device (30a, 30b), preferably at least one electronic control unit.

14. A brake assembly (100, 100', 100") comprising: at least one electromechanical actuator assembly (1) according to any one of the preceding claims; and at least one brake actuator (20), which is configured to be able to actuate or release a brake when actuated by the electromechanical actuator assembly (1).

15. A vehicle comprising at least one electro-mechanical actuator assembly (1, 1") according to any one of claims 1 to 13 and / or a brake assembly (100, 100', 100") according to claim 14, wherein, The vehicle is a commercial vehicle and / or an electric or hybrid vehicle.

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