Device for moving a sliding coupling of an electric axle drive device, and electric axle drive device

Abstract

The invention relates to a device (1) for moving a sliding coupling (51) of an electric axle drive device (30), comprising: - a shifting mechanism (2) for transmitting an actuating movement in an axial direction (A) to a sliding coupling (51) of an electric axle drive device (50), - wherein the shifting mechanism (2) comprises a receptacle (3) for an actuating mechanism (4) of the device (1), - an actuating mechanism (4) for outputting and / or transmitting an actuating movement to the shifting mechanism (2), - wherein the actuating mechanism (4) is located in the receptacle (3) of the shifting mechanism (2), and - wherein the receptacle (3) and the actuating mechanism (4) are configured and designed in such a way that the actuating mechanism (4) is movable relative to the receptacle (3) through a predetermined stroke (H) in the axial direction (A). The invention also relates to an electric axle drive device (50) for a motor vehicle.

Description

[0001] Device for moving a sliding sleeve of an electric axle drive device and electric axle drive device

[0002] The invention relates to a device for moving a sliding sleeve of an electric axle drive device and to an electric axle drive device for a motor vehicle.

[0003] In the automotive sector, so-called e-axles or electric axle drive devices for motor vehicles are known for hybrid or purely electric drives. These electric axle drive devices are equipped with a disconnect unit (DCU) or with a device for moving a sliding sleeve of an electric axle drive device for a motor vehicle.

[0004] In these DCUs, or devices for moving a sliding sleeve, it frequently occurs that the toothing of a sliding sleeve in an electric axle drive device and the switching toothing of an output of an electric axle drive device are tooth-to-tooth aligned. Therefore, the two cannot be positively engaged, and no force can be transmitted from one to the other.

[0005] In this process, the sliding sleeve is moved in a retraction direction despite the tooth-on-tooth position, in order to establish a positive fit between the teeth of the sliding sleeve and the switching teeth of an output. This leads to increased wear and reduced shifting comfort, as well as noticeably louder noises.

[0006] Against this background, the present invention is therefore based on the objective of providing a device for moving a sliding sleeve of an electric axle drive device and an electric axle drive device for a motor vehicle, which can be manufactured cost-effectively and with minimal material usage, and which increases shifting comfort and / or reduces wear and / or reduces noise.

[0007] This problem is solved by the features of the independent claims. Further advantageous embodiments are the subject of the dependent claims. A first aspect of the present invention comprises a device for displacing a sliding sleeve of an electric axle drive device.

[0008] The device includes a switching device for transmitting an actuating movement, such as a linear or translational movement, along an axial direction to a sliding sleeve of an electric axis drive device. The switching device can be configured as a switching fork or a rocker switch. The switching fork can be designed to be translationally movable to generate a translational movement. The rocker switch can be designed to be rotationally movable to generate a translational movement.

[0009] The switching device includes a receptacle for an actuating device. The receptacle can be formed by the switching device itself. It can also have an open and a closed end face. Furthermore, the receptacle can be configured similarly to a tube-within-a-tube arrangement with an inner and an outer tube. In this configuration, the inner and outer tubes can both originate at or extend from the closed end face or from a plate, from which both can extend away from and / or towards the open end face. Additionally, the outer tube can have a greater axial length than the inner tube.

[0010] Furthermore, the device has an actuating device for delivering and / or transmitting an actuating movement to the switching device. The actuating device is arranged in the receptacle of the switching device.

[0011] The receiver and the positioning device are designed and configured and / or coordinated in such a way that the positioning device is movable relative to the receiver, e.g., only or just by a predetermined stroke in the axial direction.

[0012] Alternatively or additionally, the receiver and the actuating device are geometrically aligned in such a way that the actuating device is movable or traversable relative to the receiver of the switching device, e.g., only or solely by a predetermined stroke in the axial direction.

[0013] Otherwise, or as a rule, the actuating device and the receiver or switching device can move synchronously with each other. The predetermined stroke allows the relative movement of the actuating device to the receiver and / or the switching device or switching sleeve or sliding sleeve of an electric axle drive device to an output or to a drive of an electric axle drive device to increase switching comfort and / or reduce wear and / or reduce noise.

[0014] The predetermined stroke can have a dimension corresponding to a rounding or chamfer on the teeth of a shift sleeve or sliding sleeve of an electric axle drive device, e.g., taking into account a tolerance deviation of + / -10%. A rounding or chamfer can be produced cost-effectively and with minimal material usage.

[0015] The predetermined stroke can also have a dimension between 0.5 and 5 mm or between 1 and 3 mm. Furthermore, the predetermined stroke can have a dimension of 1.5 mm.

[0016] Furthermore, the device can include an energy storage device, which, like the actuating device, can be arranged in the receptacle of the switching device. The energy storage device can be arranged between the actuating device, e.g., its second part, and the receptacle of the switching device. The energy storage device can also bear against a contact surface of a flange of the actuating device or against a flange of the actuating device and a closed end face of the receptacle. In addition, the energy storage device can be pre-tensioned so that a compressive force can be exerted on the actuating device, e.g., on its second part.

[0017] Furthermore, the energy storage device can include at least one spring. This can be easily implemented. At least two springs can be arranged on a circle. Moreover, the at least one spring can be designed as a compression spring, a helical spring, and / or a wave spring.

[0018] Furthermore, the receptacle can include two stops, between which the actuating device, e.g., its second part, can be arranged. The distance between the two stops can be designed and configured such that the actuating device, e.g., its second part, is movable relative to the receptacle and between the two stops by the predetermined stroke in the axial direction. The receptacle can also include a first stop formed by the open end face of the receptacle. The first stop can be formed by the open end face of the inner tube of the receptacle, e.g., in a tube-in-tube arrangement of the receptacle.

[0019] Furthermore, the receptacle can include a second stop, which can be formed by a locking unit of the device at the open end face of the receptacle. The second stop can be arranged at the open end face of the outer tube of the receptacle, e.g., in a tube-in-tube arrangement of the receptacle.

[0020] The first and second stops can be spaced apart. The distance between the two stops partially determines the predetermined stroke.

[0021] Furthermore, the device may include a locking unit for securing the actuator within the receptacle of the switching device. The locking unit may include a retaining ring. Additionally, the locking unit may include a washer. Furthermore, the locking unit may be arranged on the open end face of the receptacle or on the open end face of the outer tube of the receptacle, e.g., in a tube-in-tube arrangement. The locking unit may also be arranged inside the outer tube of the receptacle, e.g., in a tube-in-tube arrangement.

[0022] Furthermore, the actuating device can be designed as a spindle drive, a hydraulic or pneumatic cylinder, an electric linear motor, a rack and pinion, or as part of a spindle drive, such as a spindle nut, or as the piston rod of a hydraulic or pneumatic cylinder. These designs are simple and cost-effective to implement.

[0023] Furthermore, the actuating device can include a first part for transmitting a rotary motion. This first part can be designed as a spindle, e.g., a threaded spindle. This is simple and cost-effective to implement.

[0024] Furthermore, the actuating device can include a second part for converting a rotary motion into a linear motion or an actuating motion. This second part can be rotationally fixed in the mount and / or designed as a spindle nut. This design is also cost-effective and simple to implement. Additionally, the actuating device or its second part can be designed with a contact surface against which an energy storage device can rest. The actuating device or its second part can also have a flange that forms the contact surface. The flange can have an outer dimension that corresponds to the inner dimension of the mount, e.g., the inner dimension of the outer tube of the mount, so that the mount can act as a guide for the actuating device or its second part. The flange can be designed as an annular disc.

[0025] Furthermore, the adjusting device or its second part, e.g. designed as a spindle nut, can include a further external dimension that can correspond to the internal dimension of the receptacle, e.g. with the internal dimension of the inner tube of the receptacle, so that the receptacle can form a guide for the adjusting device or its second part.

[0026] The second part can be designed or implemented as a sleeve with a flange at one end of the sleeve.

[0027] Furthermore, the switching device can include at least one interface to transmit an actuating movement along an axial direction to a sliding sleeve of an electric axle drive device and / or to transmit an actuating movement along an axial direction to a force absorption of a sliding sleeve of an electric axle drive device.

[0028] The switching device can include a linear guide along which the switching device is movable and / or displaceable. The linear guide can have a first guide element, which can be designed as a hollow cylinder and be part of the switching device. The linear guide can also include a second guide element, which can be designed as a rod and / or a cylinder, and which can be fixedly arranged in a housing of an electric axis drive device.

[0029] A second aspect of the present invention comprises an electric axle drive device for a motor vehicle.

[0030] It is expressly pointed out that the features of the device, as mentioned under the first aspect, can be used individually or in combination for both electric axle drive devices for a motor vehicle.

[0031] In other words, the features relating to the device mentioned above under the first aspect of the invention can also be combined with further features under the second aspect of the invention.

[0032] An electric axle drive device for a motor vehicle comprises a device according to the first aspect.

[0033] Furthermore, the electric axle drive device may include a sliding sleeve for connecting or disconnecting a power transmission between an output or a drive of an electric axle drive device and a synchronizer body or sleeve carrier that can be connected to at least one vehicle wheel.

[0034] The sliding sleeve can have circumferential teeth. The teeth on the end faces of the sliding sleeve can have a chamfer or a rounded edge that corresponds to, is matched to, or has a larger dimension than the predetermined stroke of the device.

[0035] Furthermore, the output or input can have a switching gear and / or be designed as a gear with a switching gear and / or as a clutch body. The switching gear can have a chamfer or a rounding on at least one end face of the output or input, which corresponds to the predetermined stroke of the device, or which is matched to the predetermined stroke of the device, or which may have a larger dimension than the predetermined stroke. As mentioned, the electric axle drive device for a motor vehicle has a device according to the first aspect.

[0036] The switching device of the apparatus can be operatively connected to the sliding sleeve of the electric axle drive device, so that an actuating movement of the switching device can be transferred to the sliding sleeve.

[0037] Furthermore, at least one interface of the device can encompass or engage a force-bearing element of the sliding sleeve. The force-bearing element can be designed as a flange or a groove. Additionally, the electric axle drive device can include an electric actuator for generating a positioning movement. The electric actuator can comprise a motor and a shaft by which a positioning movement of the electric actuator can be transmitted to the positioning element of the device. The shaft and the first part of the positioning element of the device can be rotationally fixed to each other.

[0038] Furthermore, the electrical actuator device may have a first sensor, which may be designed to detect the number of rotations of the shaft and / or to detect the direction of rotation of the shaft.

[0039] Furthermore, the electrical actuator may have a second sensor, which may be designed to detect the initial position of the switching device. In the initial position, the torque connection between the output or the drive and the sleeve carrier may be interrupted.

[0040] Furthermore, the electric axle drive device may include a control unit. The control unit may be configured and designed to activate and deactivate the motor of the electric axle drive device and / or to read the first sensor and / or the second sensor.

[0041] Furthermore, the control system can be set up and designed to move the switching device in the engagement or disengagement direction, in which the output / drive and the sleeve carrier are connected or separated in a torque-transmitting manner, e.g. via the sliding sleeve, in conjunction with the motor of the electric axle drive device and / or the first and / or second sensor.

[0042] Furthermore, the control system can be configured and designed to, in conjunction with the motor of the electric axle drive device and a second sensor, initially move the switching device to its starting position, for example, when a vehicle is restarted. Thus, the control system can determine the position of the switching device.

[0043] Furthermore, the control system can specify how many shaft rotations, starting from the initial position, are required to achieve contact between the teeth of the sliding sleeve and the switching teeth of the output or input. Thus, the control system can define the distance the actuator, driven by the shaft, should travel until the teeth of the sliding sleeve and the switching teeth of the output or input make contact.

[0044] Furthermore, the control system can be configured and designed to slow the rotational speed of the electric axle drive motor shortly before or upon contact between the teeth of the sliding sleeve and the switching teeth of the output or input, in order to facilitate a positive-locking connection between the teeth and the switching teeth. While this can result in a shorter switching time, it also leads to reduced wear and lower noise, thereby increasing driving comfort.

[0045] The control system can also be set up and configured to monitor the rotational speed of the output or drive and the sleeve carrier, and thus also the sliding sleeve, by means of additional sensors, in order to connect the output / drive and the sleeve carrier and / or sliding sleeve, e.g., at the earliest, at a differential rotational speed between 10 and 60 revolutions per minute, in a torque-transmitting manner.

[0046] The control system can store information on how many shaft rotations, starting from the initial position, are required to achieve reliable engagement of the gear teeth of the sleeve carrier and the switching gears of the output or input. As a result, the control system is aware of various paths and positions.

[0047] Furthermore, the control system can be configured and designed to move or reposition the sliding sleeve in the engagement direction, e.g., in the direction of the output or the drive of the electric axle drive device, before reaching a differential speed of between 10 and 60 revolutions per minute between the output / drive and the sleeve carrier and / or sliding sleeve, and / or when approaching in the direction of the aforementioned differential speed, by means of the switching device.

[0048] If the differential speed is outside the specified range, and the control system continues to move the sliding sleeve in the engagement direction via the switching device, the teeth of the sliding sleeve and the switching teeth of the output or input can slip against each other without forming a positive connection. It is precisely in this case that the device, through the interaction of the actuating device, energy storage, and its mounting in the switching device, can come into play. With its predetermined stroke, the device can allow movement of the sliding sleeve and / or the switching device against the engagement direction during the engagement of the sliding sleeve's teeth into the switching teeth of the output or input. This movement against the engagement direction can correspond to the predetermined stroke at most.

[0049] In other words, the predetermined stroke and / or the device, in conjunction with the actuator, energy storage, and the mounting in the switching device, can serve to reduce the force with which the switching device is moved in the engagement direction. This can reduce the wear of all components involved and achieve increased switching comfort, as it also avoids noise.

[0050] The invention is explained in more detail below with reference to an exemplary embodiment and the accompanying drawings. These schematically show:

[0051] Fig. 1 shows a first spatial view of a device for moving a sliding sleeve;

[0052] Fig. 2 shows a second spatial view of the device from Figure 1;

[0053] Fig. 3 shows a sectional view of the device from Figure 1 including an enlarged section;

[0054] Figs. 4A, 4B show a schematic view of the relative position of a sliding sleeve and an output shaft of an electric axle drive device; and

[0055] Fig. 5A, 5B a schematic view of another relative position of a sliding sleeve and an output of an electric axle drive device.

[0056] In the following description, the same reference numerals are used for the same objects. Figure 1 shows a first spatial view of a device 1 for moving a sliding sleeve 51. Figure 2 shows a second spatial view of the device 1 from Figure 1, with Figure 3 showing a sectional view of the device 1 from Figure 1 including an enlarged section.

[0057] For the sake of simplicity, figures 1 to 3 are described together below.

[0058] Figures 1 to 3 show a device 1 for moving a sliding sleeve 51 with a switching device 2.

[0059] The switching device 2 serves to transmit an actuating movement, such as a linear or translational movement, along an axial direction A to a sliding sleeve 51 of an electric axis drive device 50. The switching device 2 has a receptacle 3 for an actuating device 4 of the device 1. Furthermore, the device 1 has an actuating device 4 for outputting and / or transmitting an actuating movement to the switching device 2. The actuating device 4 is arranged in the receptacle 3 of the switching device 2.

[0060] The receptacle 3 and the actuating device 4 are configured and designed, or rather, coordinated with each other, such that the actuating device 4 can be moved relative to the receptacle 3 by a predetermined stroke H in axial direction A. In other words, the receptacle 3 and the actuating device 4 are geometrically coordinated such that the actuating device 4 can be moved relative to the receptacle 3 of the switching device 2 by a predetermined stroke H in axial direction A. Otherwise, or normally, the actuating device 4 and the receptacle 3, or the switching device, move synchronously with each other.

[0061] The predetermined stroke H has a dimension corresponding to a rounding or chamfer of a toothing of a switching sleeve 51 or sliding sleeve 51 of an electric axle drive device 50. In this case, the predetermined stroke H has a dimension of 1.5 mm. In simplified terms, this means that the receptacle 3 and the actuating device 4 can move relative to each other within a range of 1.5 mm. Figure 3 shows that the receptacle 3 is formed by the switching device 2 and that the receptacle 3 has an open and a closed end face. The receptacle 3 is designed similarly to a tube-in-tube arrangement with an inner tube 3A and an outer tube 3B. The inner and outer tubes 3A, 3B originate together at the closed end face, both extending towards the open end face. The outer tube 3B has a greater length in the axial direction A than the inner tube 3A.

[0062] Furthermore, Figure 3 shows that the device 1 comprises an energy storage device 5 which, like the actuating device 4, is also arranged in the receptacle 3 of the switching device 2.

[0063] In more detail, the energy storage device 5 is arranged between the actuating device 4 or its second part 12 and the receptacle 3 of the switching device 2.

[0064] To describe in more detail, the energy storage device 5 is located on a mounting surface 13 of a flange 14 of the actuating device 4 and on a closed end face of the receptacle 3.

[0065] The energy storage device 5 is pre-tensioned, so that a pressure force is exerted on the actuating device 4 or on its second part 12.

[0066] According to Figure 3, the energy storage device 5 has several springs arranged on a circle, which are designed as compression springs.

[0067] As can be seen in Figure 3, the receptacle 3 comprises two stops 6, 7, between which the actuating device 4, or its second part 12, is arranged. The distance between the two stops 6, 7 is designed and configured such that the actuating device 4, or its second part 12, is movable relative to the receptacle 3, or between the two stops 6, 7, by the predetermined stroke H in the axial direction A. As just described, the receptacle 3 has two stops 6, 7, or rather a first stop 6, which is formed by the open end face of the inner tube 3A of the receptacle 3, and a second stop 7, which is formed by a locking unit 8 of the device 1 on the open end face of the receptacle 3.

[0068] More precisely, the second stop 7 is arranged on the open end face of the outer tube 3B. The first and second stops 6, 7 are spaced apart from each other. As indicated, the device 1 includes a locking unit 8 for securing the actuating device 4 in the receptacle 3 of the switching device 2.

[0069] The locking unit 8 comprises a retaining ring 9 and a washer 10. As already explained, the locking unit 8 is arranged on the open end face of the receptacle 3 or on the open end face of the outer tube 3B. Furthermore, the locking unit 8 is arranged inside the outer tube 3B.

[0070] Figure 3 also shows that the adjusting device 4 is designed as a spindle drive. The adjusting device 4 has a first part 11 for transmitting a rotary motion, which is designed as a spindle, e.g., as a threaded spindle.

[0071] Furthermore, the actuating device 4 - see Figure 3 - has a second part 12 for converting a rotary movement into a linear movement or into an actuating movement, wherein the second part 12 is designed as a spindle nut.

[0072] As shown in Figure 3, the actuating device 4, or rather its second part 12, is designed with a contact surface 13 against which the energy storage device 5 of the device 1 rests. More specifically, the actuating device 4, or rather its second part 12, has a flange 14 which forms the contact surface 12. The flange 14 has an outer dimension that corresponds to the inner dimension of the receptacle 3, or rather to the inner dimension of the outer tube 3B of the receptacle 3, so that the receptacle 3 forms a guide for the actuating device 4, or rather its second part 12.

[0073] As described, the second part 12 is designed as a spindle nut, wherein the second part 12 also has a further external dimension that corresponds to the internal dimension of the receptacle 3 or to the internal dimension of the inner tube 3A of the receptacle 3, so that the receptacle 3 forms a guide for the adjusting device 4 or its second part 12.

[0074] In simplified terms, the second part 12 is designed or implemented as a sleeve with a flange at one end.

[0075] As shown in Figures 1 to 3, the switching device 2 comprises two interfaces 15, 16 to transmit an actuating movement along the axial direction A to a sliding sleeve 51 of an electric axle drive device 50 and / or to transmit an actuating movement along the axial direction A to a force receiving of a sliding sleeve 51 of an electric axle drive device 50.

[0076] Furthermore, the switching device 2 has a linear guide 17 along which the switching device 2 can be moved or displaced.

[0077] The linear guide 17 comprises a first guide part 18, which is designed as a hollow cylinder and is connected to the switching device 2. Furthermore, the linear guide 17 comprises a second guide part 19, which is designed as a rod and / or as a cylinder and which can be arranged in a fixed position within a housing of an electric axis drive device 50.

[0078] In addition to the device 1 for moving a sliding sleeve 51, figures 1 to 3 also show an electric axle drive device 50 for a motor vehicle.

[0079] The electric axle drive device 50 has a sliding sleeve 51 for connecting or disconnecting a power transmission between an output 52 of an electric axle drive device and a synchronizing body or sleeve carrier 53, which can be connected to two vehicle wheels.

[0080] The sliding sleeve 51 has circumferential teeth which have a chamfer on the end faces of the sliding sleeve 51. The chamfer corresponds to the predetermined stroke H of the device 1.

[0081] Furthermore, the output 52 includes a switching tooth or is designed as a switching wheel with a switching tooth. The output 52 can also be referred to as a clutch body.

[0082] In this case, the switching toothing has a chamfer on its end faces which corresponds to the predetermined stroke H of the device 1 or which is matched to the predetermined stroke H of the device 1.

[0083] Furthermore, the electric axle drive device 50 comprises the device 1 described above, wherein the switching device 2 of the device 1 is operatively connected to the sliding sleeve 51 of the electric axle drive device 50, so that an actuating movement of the switching device 2 can be transferred to the sliding sleeve 51.

[0084] Figure 2 shows that the two interfaces 15, 16 engage a force-bearing element of the sliding sleeve 51, the force-bearing element being designed as a flange. Figures 1 to 3 also show that the electric axle drive device 50 includes an electric actuator 54 for generating a positioning movement. The electric actuator 54 has a motor and a shaft 55, by which a positioning movement of the electric actuator 54 can be transmitted to the actuating device 4 of the device 1.

[0085] The shaft 55 and the first part 11 of the actuating device 4 of the apparatus 1 are connected to each other in a rotationally fixed manner - see Figure 3.

[0086] Furthermore, the electrical actuator device 54 has a first sensor (not shown) which is designed to detect the number of rotations of the shaft 55 and to detect the direction of rotation of the shaft 55.

[0087] Furthermore, the electrical actuator 54 has a second sensor (not shown) which is designed to detect an initial position of the switching device 2. In this initial position, the torque connection between the output 52 and the sleeve carrier 53 is interrupted.

[0088] Furthermore, the electric axle drive device 50 includes a control unit (not shown) which is set up and configured to activate and deactivate the motor of the electric axle drive device 50 and to read the first and second sensors.

[0089] The control system is set up and designed to move the switching device 2 in the engagement or disengagement direction, in which the output 52 and the sleeve carrier 53 are connected or separated to transmit torque, in conjunction with the motor of the electric axle drive device 50 and the first sensor.

[0090] Furthermore, the control system is designed and configured to move the switching device 2 to its initial position, for example, when a motor vehicle is restarted, in conjunction with the motor of the electric axle drive device 50 and the second sensor. Thus, the control system can determine the position of the switching device 2.

[0091] Furthermore, the control unit specifies how many revolutions of the shaft 55, starting from the initial position, are required to achieve contact between the teeth of the sliding sleeve 51 and the switching teeth of the output 52. In other words, the control unit specifies the distance by which the actuating device, driven by the shaft 55, should move the switching device 2 until the teeth of the sliding sleeve 51 and the switching teeth of the output 52 make contact.

[0092] Figures 4A and 4B, where Figure 4B is an enlarged view of part of Figure 4A, show exactly this; namely, the motor of the electric axle drive device 50 was activated and the switching device 2 was moved via the actuating device 4 from the starting position to the contact between the toothing of the sliding sleeve 51 and the switching toothing of the output 52.

[0093] Furthermore, the control system is designed and configured to slow the rotational speed of the motor of the electric axle drive device 50 shortly before or upon contact of the teeth of the sliding sleeve 51 with the switching teeth of the output 52, in order to facilitate a positive-locking connection between the teeth and the switching teeth. This results in reduced wear of all components involved and increased shifting comfort, as noise is avoided. In addition, the control system is designed and configured to monitor the rotational speed of the output 52 and sleeve carrier 53, and thus also of the sliding sleeve 51, by means of further sensors, in order to connect the output 52 and sleeve carrier 53 or sliding sleeve 51 for torque transmission no earlier than when the differential rotational speed is between 10 and 60 revolutions per minute.The control unit stores information on how many revolutions of shaft 55, starting from the initial position, are required for the reliable engagement of the teeth of the sleeve carrier 53 and the switching teeth of the output 52. As a result, various paths and positions of the control unit are known.

[0094] If the differential speed is outside the specified range, and the control unit, via the switching device 2, further displaces the sliding sleeve 51 in the engagement direction, the teeth of the sliding sleeve 51 and the switching teeth of the output 52 slip against each other without forming a positive connection. This is illustrated in Figures 5A and 5B, where Figure 5B is an enlarged view of part of Figure 5A.

[0095] In this specific case, the device 1 comes into play through the interaction of the actuating device 4, the energy storage device 5, and the receptacle 3 in the switching device 2. With its predetermined stroke H, the device 1 allows movement of the sliding sleeve 51, or the switching device 2, against the engagement direction during the engagement of the gear teeth of the sliding sleeve 51 with the switching gear teeth of the output 52. This movement against the engagement direction can correspond to a maximum of the predetermined stroke H.

[0096] In other words, the predetermined stroke H, or device 1, in conjunction with actuating device 4, energy storage device 5, and receptacle 3 in the switching device 2, serves to reduce the force with which the switching device is moved in the engagement direction. This reduces wear on all components involved and improves switching comfort, as it also prevents noise. (Reference symbol list)

[0097] device

[0098] Switching device

[0099] Recording

[0100] An inner tube of the recording

[0101] B outer tube of the recording

[0102] Actuator

[0103] Energy storage

[0104] first attack

[0105] second attack

[0106] Security unit

[0107] retaining ring

[0108] 10 Washers

[0109] 11 Part One

[0110] 12 Part Two

[0111] 13 Plant area

[0112] 14 flange

[0113] 15 Interface

[0114] 16 Interface

[0115] 17 Linear guide

[0116] 18 first part of the guide

[0117] 19 second part of the guide

[0118] 50 electric axle drive device

[0119] 51 Sliding sleeve

[0120] 52 Drive

[0121] 53 sleeve carriers

[0122] 54 electrical actuator device

[0123] 55 wave

[0124] H predetermined stroke A axial direction

Claims

Patent claims 1. Device (1 ) for displacing a sliding sleeve (51 ) of an electric axle drive device (30) comprising: - a switching device (2) for transmitting an actuating movement along an axial direction (A) to a sliding sleeve (51) of an electric axle drive device (50), - wherein the switching device (2) comprises a receptacle (3) for an actuating device (4) of the apparatus (1), - an actuating device (4) for delivering and / or transmitting an actuating movement to the switching device (2), - wherein the actuating device (4) is arranged in the receptacle (3) of the switching device (2), and - wherein the receptacle (3) and the actuating device (4) are arranged and designed such that the actuating device (4) is movable relative to the receptacle (3) by a predetermined stroke (H) in the axial direction (A).

2. Device according to claim 1 , - wherein the predetermined stroke (H) has a dimension corresponding to a rounding or chamfer of a toothing of a switching sleeve (51) or sliding sleeve (51) of an electric axle drive device (50) taking into account a tolerance deviation of + / - 10%.

3. Device according to claim 1 or 2, - wherein the intake (3) is formed by the switching device (2), - wherein the receptacle (3) is designed similarly to a pipe-in-pipe arrangement with an inner (3A) and an outer pipe (3B), 4. Device according to one of the preceding claims, wherein the device (1) comprises an energy storage device (5) which is arranged in the receptacle (3) of the switching device (2), - wherein the energy storage device (5) is arranged between the actuating device (4) and the receptacle (3) of the switching device (2), and / or - wherein the energy storage device (5) is pre-tensioned so that a pressure force can be exerted on the actuating device (4).

5. Device according to one of the preceding claims, - wherein the actuating device (4) is designed as a spindle drive or as a hydraulic or pneumatic cylinder or as an electric linear motor or as a rack or as part of a spindle drive, such as a spindle nut, or as a piston rod of a hydraulic or pneumatic cylinder.

6. Electric axle drive device (50) for a motor vehicle comprising: - a device (1) according to any one of the preceding claims, - a sliding sleeve (51) for connecting or disconnecting a power transmission between an output (52) or a drive of an electric axle drive device and a synchronizing body or sleeve carrier (53) that can be connected to at least one vehicle wheel, - wherein the sliding sleeve (51) has a toothed section in the circumferential direction, - wherein the output (52) or the input has a switching toothed section and / or is designed as a switching wheel with a switching toothed section and / or as a coupling body, and - wherein the switching device (2) of the device (1) is operatively connected to the sliding sleeve (51) of the electric axle drive device 50, such that an actuating movement of the switching device (2) can be transmitted to the sliding sleeve (51), 7. Electric axle drive device according to claim 6, - wherein the toothing on the end faces of the sliding sleeve (51) has a chamfer or a rounding which corresponds to the predetermined stroke (H) of the device (1) or is matched to the predetermined stroke (H) of the device (1) or has a larger dimension than the predetermined stroke (H), and / or - wherein the switching gear has at least on one end face of the output (52) or the input a chamfer or a rounding which corresponds to the predetermined stroke (H) of the device (1) or which is matched to the predetermined stroke (H) of the device (1) or which has a larger dimension than the predetermined stroke (H).

8. Electric axle drive device according to claim 6 or 7, - wherein the electric axle drive device (50) comprises an electric actuator device (54) for generating an actuating movement, - wherein the electrical actuator device (54) comprises a motor and a shaft (55) by which an actuating movement of the electrical actuator device (54) can be transmitted to the actuating device (4) of the apparatus (1), - wherein the electrical actuator device (54) has a first sensor which is designed to detect the number of rotations of the shaft (55) and / or to detect the direction of rotation of the shaft (55), and / or - wherein the electrical actuator device (54) has a second sensor which is designed to detect an initial position of the switching device (2), and - wherein in the starting position the torque connection between the output (52) or the drive and the sleeve carrier (53) is interrupted.

9. Electric axle drive device according to one of the preceding claims, - wherein the electric axle drive device (50) has a control unit, - wherein the control unit is configured and designed to activate and deactivate the motor of the electric axle drive device (50) and / or to read the first sensor and / or the second sensor, - wherein the control is set up and designed to move the switching device (2) in the engagement or disengagement direction, in which the output (52) or the drive and the sleeve carrier (53) are connected or separated in a torque-transmitting manner, in conjunction with the motor of the electric axle drive device (50) and / or the first and / or second sensor, and / or - wherein the control system is set up and designed to move the switching device (2) to the starting position in conjunction with the motor of the electric axle drive device 50 and the second sensor, and / or - wherein the control system stores how many revolutions of the shaft (55) from the starting position lead to contact between the toothing of the sliding sleeve (51) and the switching toothing of the output (52) or the drive.

10. Electric axle drive device according to one of the preceding claims, wherein the control is configured and designed to slow down the rotational speed of the motor of the electric axle drive device (50) shortly before or upon contact of the toothing of the sliding sleeve (51) with the switching toothing of the output (52) or the drive, in order to facilitate a positive locking connection between the toothing and the switching toothing, and / or - wherein the control system is set up and configured to monitor the rotational speed of the output (52) or drive and sleeve carrier (53) and thus also of the sliding sleeve 51 by means of further sensors, in order to connect the output (52) or drive and sleeve carrier (53) and / or sliding sleeve (51) in a torque-transmitting manner at a differential rotational speed between 10 and 60 revolutions per minute, - wherein the control is set up and designed to move the sliding sleeve (51) in the engagement direction by means of the switching device (2) before reaching a differential speed of between 10 and 60 revolutions per minute between output (52) or drive and sleeve carrier (53) and thus also the sliding sleeve (51) and / or when approaching in the direction of the said differential speed.

Images