Gear device for an electric drive arrangement

Abstract

A transmission device (1) for an electric drive arrangement, in particular for a motor vehicle, comprising a supply device (2), in particular comprising an oil lance and / or a grounding lance, which is arranged in a shaft of the transmission device (1), wherein the supply device (2) is connected to a guide section (5) with a receptacle (4) in a transmission cover (3), wherein at least one spring device (7) is arranged between the transmission cover (3) and the guide section (5), wherein a securing device (10) is designed to secure the guide section (5) in the receptacle (4) under pretension of the spring device (7), wherein the securing device (10) has at least one securing element (11) for securing the supply device (2) to the transmission cover (3) and an orientation element (13),which, in a mounted state of the securing device (10), engages in an orientation receptacle (14) of the receptacle (4).

Description

[0001] The invention relates to a transmission device for an electric drive arrangement, in particular for a motor vehicle, comprising a supply device, in particular comprising an oil lance and / or an earthing lance, which is arranged in a shaft of the transmission device, wherein the supply device is connected to a guide section with a receptacle in a transmission cover, wherein at least one spring device is arranged between the transmission cover and the guide section.

[0002] Transmission devices for electric drive arrangements of motor vehicles, in which a supply device, for example an oil lance and / or a grounding lance, is arranged in a shaft of the transmission device, and wherein the supply device is connected to a receptacle in a transmission cover by a guide section of the supply device, are generally known from the prior art. In other words, the guide section of the supply device is inserted into the receptacle in the transmission cover in order to connect the supply device to the transmission cover. The transmission cover and supply device are typically assembled in a state in which the supply device hangs freely from the transmission cover.

[0003] DE 10 2021 213 387 A1 discloses an arrangement for grounding a rotor shaft of an electric machine, which comprises a grounding hub via which the shaft to be grounded is electrically conductively connected to an electrical ground, preferably a housing.

[0004] DE 10 2023 200 152 A1 relates to an arrangement for grounding a shaft, in particular a drive shaft of a transmission, comprising a grounding hub via which the shaft to be grounded is electrically conductively connected to a ground, preferably a housing.

[0005] DE 10 2023 201 006 A1 discloses an arrangement for grounding a shaft, in particular a rotor shaft of an electrical machine, comprising a grounding hub via which the shaft to be grounded is electrically conductively connected to a ground, preferably a housing.

[0006] Since a spring mechanism is provided for the preload between the transmission cover and the supply device, which preloads the transmission cover and supply device or guide section against each other, freely suspended installation is not readily possible, as there is a possibility that the spring mechanism could force the supply device out of the transmission cover. Various measures are known for securing the transmission cover and supply device to each other, for example, the use of retaining rings. However, since the supply device must usually be arranged in a defined orientation within the transmission device, a simple retaining ring is not suitable for ensuring such a defined orientation.In addition, retaining rings or snap rings are often no longer effective in bores below a certain diameter, as they have to be plastically deformed too much when inserted and no longer have sufficient preload.

[0007] The invention is based on the object of specifying a transmission device for an electric drive arrangement which is improved compared to the prior art and in which securing of the supply device to the transmission cover is improved.

[0008] The object is achieved by a transmission device having the features of claim 1. Advantageous embodiments are the subject of the subclaims.

[0009] As described above, the invention relates to a transmission device for an electric drive arrangement. The transmission device is specifically intended for a motor vehicle. The transmission device comprises a supply device arranged in a shaft of the transmission device. The shaft can be, for example, a drive shaft or a shaft connected to the drive shaft, for example, a shaft extension attached to the drive shaft. The supply device is designed, for example, as an oil lance and / or as a grounding lance. The supply device can therefore assume at least one function in the transmission device. One function is, for example, guiding fluid, in particular oil, within the supply device. A further function can be to ground the shaft to which the supply device is connected.

[0010] The supply device has a guide section, particularly at the end of the supply device facing the transmission cover. When installed, the guide section engages in a receptacle in the transmission cover. A spring device is arranged between the transmission cover and the guide section, which preloads the supply device against the transmission cover and thus, for example, holds it to the shaft with a defined preload force, specifically in a holder arranged on a side opposite the transmission cover in the axial direction.

[0011] The invention is based on the finding that the transmission device has a securing device designed to secure the guide section in the receptacle under pretension of the spring device. The securing device has at least one securing element for securing the supply device to the transmission cover and an orientation element that engages in an orientation receptacle of the receptacle when the securing device is in the assembled state. The invention thus proposes providing a securing device for securing the supply device to the transmission cover—or vice versa. The securing device secures the guide section in the receptacle under pretension of the spring device.

[0012] Specifically, the securing device secures the guide section in a form-fitting manner to the receptacle in the transmission cover. The securing device comprises a securing element and an orientation element. Specifically, the securing device can comprise a plurality of securing elements. For example, the securing device is designed as a ring or annular disc from which at least one securing element and at least one orientation element protrude in the axial direction. The at least one securing element can engage an outer circumference of the transmission cover, in particular the receptacle in the transmission cover, and thus secure the supply device to the transmission cover, for example by latching.

[0013] The orientation element is provided so that, when the safety device is in the assembled state, it engages in an orientation receptacle of the receptacle. The receptacle therefore generally has a space into which the guide section can engage. The orientation receptacle, into which the orientation element can engage in the axial direction, is formed in a further area of ​​the receptacle, for example an edge area. This ensures that, when the orientation element engages in the orientation receptacle, the safety device is correctly mounted on the supply device and sufficiently engages in the receptacle or overlaps the receptacle, and, furthermore, the orientation of the supply device corresponds to the desired orientation or target orientation. If the orientation element is located in the orientation receptacle, complete assembly of the safety device can be confirmed orbe verified.

[0014] In a further embodiment of the transmission device, the guide section can be provided with a guide receptacle, wherein the orientation element, in the assembled state, engages through the guide receptacle into the orientation receptacle. For example, the securing device is moved in the axial direction toward the transmission cover over the supply device until the orientation element engages in the orientation receptacle. In doing so, the orientation element engages through the guide receptacle in the guide section. This ensures, particularly since the guide section is firmly connected to the remaining supply device, that the entire supply device is positioned by the engagement of the orientation element in the orientation receptacle.The locking device thus fulfills several tasks, namely securing the supply unit to the transmission cover so that the supply unit cannot be lost from its receptacle in the transmission cover during assembly. Furthermore, the orientation of the supply unit relative to the transmission cover or within the transmission device is determined and ensured.

[0015] The guide section defines an outer contour with the guide receptacle, for example, so that the orientation element can only penetrate or engage the guide receptacle in the specified orientation. If there is a different orientation between the safety device and the supply device, the orientation element cannot penetrate the guide section. In addition to an outer contour, the guide receptacle can also be designed as an opening in the guide section. For this purpose, the guide section can, for example, have a collar or projection projecting in the radial direction, which is open at one point to define or form the guide receptacle.

[0016] The transmission device can be further developed such that the orientation element can only be inserted into the guide receptacle and the orientation receptacle in a defined circumferential alignment of the guide section to the receptacle. As described, this ensures the positioning of the guide section relative to the rest of the supply device and the positioning of the supply device relative to the transmission cover. Only when the orientation receptacle in the transmission cover and the guide receptacle are at the same circumferential position can the orientation element engage in the orientation receptacle through the guide receptacle in this circumferential position.

[0017] As described, the orientation element is a strut or arm that extends axially from a base section of the securing device. Therefore, engagement of the orientation element is only possible if the guide recess and orientation recess are aligned axially. For example, the guide recess forms a groove into which the orientation element can be engaged axially. The orientation recess can form a counter-geometry for the orientation element, into which the orientation element can be inserted axially. However, only the orientation element and not a securing element can be engaged in the orientation recess and / or the guide recess. For example, the securing elements are shaped differently for this purpose.This means that if the securing device is correctly installed, in addition to securing the supply device to the gearbox cover, it is ensured that the individual components are correctly aligned to one another.

[0018] In a further development of the transmission device, the guide receptacle can be formed as an axial opening in the guide section or as a recess in an outer contour of the guide section. For example, the guide receptacle is formed as a diameter difference in a radial projection or in the outer circumference of the guide section. Likewise, the guide section can have a radial projection in which an axial opening is provided for the orientation element. For example, tabs of different sizes, between which the orientation element can engage, can also be formed on the outer circumference of the guide section. The guide section can be produced, for example, by forming.

[0019] In a further embodiment of the transmission device, the guide section can have a contact surface for the spring device and / or a protective edge designed to support the supply device, in particular the guide section, on the transmission cover when the spring device is compressed to a minimum length. In the first embodiment, the guide section provides a defined contact surface on which the spring device is supported on the guide section. The contact surface is oriented, for example, in the axial direction and thus forms a (flat) surface for the spring device to be applied.

[0020] The protective edge can be provided so that when the spring device is compressed or deflected to such an extent that the spring device only has a minimum length, the protective edge is supported on the gearbox cover. The protective edge can, for example, protrude from the guide section in the axial direction and come into contact with the gearbox cover in a defined manner when the spring device is deflected to its minimum length. The protective edge therefore prevents in particular that the spring device, for example a wave spring, can be over-compressed or over-pressed. If forces occur in the axial direction during assembly that would over-compress the spring device, the protective edge comes into contact with the gearbox cover beforehand so that the spring device cannot be compressed beyond the minimum length. This can prevent damage to the spring device due to over-compression of the spring device during assembly.

[0021] As described above, the orientation element on the securing element, in particular via the engagement in the orientation receptacle and the guide receptacle, is intended to ensure that the supply device is correctly oriented in the circumferential direction. In one embodiment of the gear device, a circumferential position of the orientation element and / or the orientation receptacle can be determined depending on a circumferential position of an outlet opening of the supply device. By determining the position of the orientation receptacle, the orientation in which the securing element can be mounted can be determined. As described above, there is advantageously only one position in the circumferential direction in which the orientation element can engage in the orientation receptacle through the guide receptacle. If the orientation receptacle orIf the circumferential position of the orientation element is determined depending on a circumferential position of an outlet opening of the supply device, the securing device determines that the desired orientation or the target orientation of the outlet opening is adopted during assembly.

[0022] The outlet opening can, for example, be provided for the dispensing of oil. The desired orientation can, for example, be oriented against the direction of gravity, i.e., in the vertical direction. This means that, for example, oil that is guided within the supply device, which can be tubular, is accumulated up to the outlet opening and then dispensed through the outlet opening. By specifying the desired orientation or the target orientation, unwanted emptying of the supply device is prevented, for example. Since the supply device is arranged in a rotationally fixed manner in the transmission device, this orientation is fixed via the orientation holder and the orientation element and does not change during operation.In particular, the orientation of the guide section is fixed to the remaining part of the supply device, for example a tubular base body of the supply device, for example by a rotationally fixed connection, for example pressing the guide section into the base body, or integrally forming the base body with the guide section.

[0023] In principle, the guide section and supply device, or the remainder of the supply device, i.e., for example, the tubular base body, can be manufactured in any desired manner and, if necessary, connected to one another. To ensure the orientation of the supply device, in particular of the base body, for example, the previously described outlet opening, a fixed or rotationally fixed connection between the guide section and the base body of the supply device is advantageous. For this purpose, for example, the guide section can be formed integrally with the supply device, in particular a lance of the supply device, or the guide section can be formed separately, in particular as a plug-on section or plug-in section.

[0024] For example, an integral design of the guide section and the base body of the supply device can be achieved by forming, for example folding, arching, turning over and the like. Alternatively, the guide section can be designed separately from the base body and firmly connected to the base body. The guide section can, for example, have a plug-on section that is plugged over the base body of the supply device, at least in sections. Alternatively, the guide section can have an insert section that can be inserted into an opening in the base body of the supply device. Any design of the guide section and the base body of the supply device is possible, for example from metal or plastic, in particular from steel.

[0025] In addition to the transmission device, the invention relates to an electric drive arrangement comprising a previously described transmission device. Furthermore, the invention relates to a motor vehicle comprising a previously described transmission device and / or a previously described electric drive arrangement.The invention also relates to a method for producing a transmission device for an electric drive arrangement, in particular for a motor vehicle, comprising a supply device, in particular comprising an oil lance and / or an earthing lance, which is arranged in a shaft of the transmission device, wherein the supply lance is connected to a guide section with a receptacle in a transmission cover, wherein at least one spring device is arranged between the transmission cover and the guide section, wherein the guide section is secured in the receptacle with a securing device under pretension of the spring device, wherein the securing device has at least one securing element for securing the supply device to the transmission cover and an orientation element which, when the securing device is in the assembled state, engages in an orientation receptacle of the receptacle.

[0026] All advantages, details, and features described with regard to the transmission device are fully applicable to the electric drive assembly, the motor vehicle, and the method. The method can be used, in particular, to manufacture a previously described transmission device in all its details.

[0027] The invention is explained below using exemplary embodiments with reference to the figures. The figures are schematic representations and show: Fig. 1 a schematic diagram of a section of a transmission device for an electric drive arrangement; Fig. 2 a schematic diagram of a detail of the transmission device of Fig. 1; Fig. 3 a schematic diagram of a detail of the transmission device of Fig. 1, Fig. 2 in an assembled state; Fig. 4 a schematic diagram of a detail of the transmission device of Fig. 1-3 in an unassembled state; Fig. 5 a schematic diagram of a detail of a gear cover of the gear device of Fig. 1-4; Fig. 6 a schematic diagram of a guide section of a gear device of Fig. 1-5; Fig. 7 a schematic diagram of a safety device of a transmission device of Fig. 1-6 in a first view; and Fig. 8 a schematic diagram of the safety device of Fig. 7 in a second view.

[0028] Fig. 1 shows a schematic section of a transmission device 1 for an electric drive arrangement. The electric drive arrangement can be provided in particular for a motor vehicle. This means that the motor vehicle or the electric drive arrangement has at least one electric machine provided or designed to generate torque for a drive. The transmission device 1 has a supply device 2, which represents, for example, a combination of an oil lance with a grounding lance. This means that the supply device 2 is designed to ground a shaft in which the supply device 2 is arranged or to which the supply device 2 is connected. In addition, the supply device 2 can be designed to conduct a fluid within the supply device 2, in particular oil.

[0029] In Fig. 1 further shows that the supply device 2 is arranged on a gear cover 3. As exemplified in Fig. As shown in Figure 2, the gear cover 3 has a receptacle 4 into which a guide section 5 of the supply device 2 engages. Although the guide section 5 is shown as a separate part, the guide section 5 can also be formed integrally with a tubular base body 6 of the supply device 2, for example, by forming. Alternatively, the guide section 5 can also be designed as a separate part and be firmly, in particular rotationally fixedly, connected to the base body 6, for example, by pressing, pressing on, welding, gluing, and the like.

[0030] A spring device 7, designed for example as a corrugated spring, is provided between the guide section 5 and the receptacle 4 or the gear cover 3. This spring device 7 preloads the guide section 5 and thus the supply device 2 in the assembled state in the axial direction. The guide section 5 also has a contact surface 8 for the spring device 7, against which the spring device 7 rests in the axial direction or is supported on the guide section 5. In addition, the spring device 7 is supported on the gear cover 3 on the opposite side in the axial direction. The guide section 5 also has a protective edge 9. The protective edge 9 is provided to prevent over-compression of the spring device 7, for example during assembly of the gear device 1. If a force acts in the axial direction on the gear cover 3 or on the guide section 5, which compresses the spring device 7, this is only possible up to a minimum length.If the spring device 7 is compressed to the minimum length, the protective edge 9 rests against the gear cover 3 in the axial direction, so that further compression is not possible.

[0031] Further in Fig. 1-4, 7, 8, a securing device 10 is shown. The securing device 10 has at least one securing element 11, in particular a plurality of securing elements 11 arranged distributed in the circumferential direction. The securing elements 11 are provided to secure the supply device 2 to the transmission cover 3. For example, the securing elements 11, as shown in Fig. 2, Fig. 7, Fig. 8, locking elements 12 are designed to lock onto the gear cover 3. For example, the gear cover 3 has a circumferential groove for this purpose. This ensures that a supply device 2 mounted on the gear cover 3 is securely held on the gear cover 3. If the supply device 2 is mounted freely suspended together with the gear cover 3 in the gear device 1 or the electric drive arrangement, it is ensured that the supply device 2 cannot detach itself from the gear cover 3.

[0032] In addition, the safety device 10 has an orientation element 13. In particular, it is provided that the safety device 10 has exactly one orientation element 13. The orientation element 13 is, for example, in Fig. 3, Fig. 4, Fig. 7, Fig. 8. If the guide section 5 engages in the receptacle 4, the orientation element 13 engages in an orientation receptacle 14, provided the securing device 10 is fully assembled. The orientation element 13 thereby engages through a Fig. 6 shows the guide receptacle 15, which is arranged or formed on the guide section 5. For example, the receptacle 4 of the gear cover 3 is shown in Fig. 5 is shown in detail. If the supply device 2 is inserted into the receptacle 4 with the guide section 5, this is only possible if the orientation of the supply device 2 or the guide section 5 firmly connected to the supply device 2 is correctly aligned in the circumferential direction. In other words, there is only one circumferential position at which the guide section 5 can be inserted into the receptacle 4.

[0033] If the safety device 10 is pushed onto the outer circumference of the holder 4 via the supply device 2, as shown in Fig. 2, this is only possible if the orientation of the receptacle 4, guide section 5, in particular guide receptacle 15, and securing device 10 matches, so that the orientation element 13 can engage in the axial direction in the orientation receptacle 14 and the guide receptacle 15. For example, in Fig. 4 shows that an orientation deviating from the desired orientation is present. In this case, the orientation element 13 abuts a section of the guide section 5 in the axial direction and cannot be engaged in the guide receptacle 15. Therefore, it is necessary that the supply device 2 is correctly aligned in the circumferential direction, i.e., that the guide receptacle 15 of the guide section 5 is arranged at the same circumferential position as the orientation receptacle 14. In this case, the orientation element 13 can be engaged by the guide receptacle 15 and engage in the orientation receptacle 14, as shown in Fig. 3 is shown.

[0034] As described, the securing device 10 determines the orientation of the supply device 2 in the transmission device 1 or in the electric drive arrangement. For example, the orientation can be related to an outlet opening 16 or the target orientation can be coordinated with the circumferential position of the outlet opening 16. The target orientation can in particular be selected such that the outlet opening 16 points in the vertical direction, i.e. "upwards" against the direction of gravity. Since the supply device 2 is designed, for example, to guide a medium, in particular oil, this ensures that the outlet opening 16 points upwards and thus the medium can be dispensed when the interior of the supply device 2 or the base body 6 is completely filled, for example to limit the pressure within the base body 6.If, for example, the conveyance of the medium into the interior of the base body 6 is stopped, the defined outlet opening 16 prevents the base body 6 from running dry.

[0035] As already described, the connection between the guide section 5 and the base body 6 can be designed as desired. The base body 6 and the guide section 5 can, for example, be designed integrally, for example through at least one forming process. It is also possible to form the guide section 5 separately and then connect it to the base body 6, for example by slipping it onto the base body 6 in the axial direction or inserting it into the base body 6 in the axial direction. For this purpose, the guide section 5 can have a slip-on section or an insert section or be designed as such. It is also possible for the guide section 5 to be designed as a ring and applied to the base body 6.

[0036] The method described herein can be used for manufacturing, in particular for assembling, the transmission device 1 shown here. As described, the transmission device 1 is in particular a component of an electric drive assembly (not shown in detail). Furthermore, the transmission device 1 or the electric drive assembly can be a component of a motor vehicle. All advantages, details, and features described with reference to the transmission device 1 are fully applicable to the method, the electric drive assembly, and the motor vehicle.

[0037] All advantages, details and features described with reference to the individual embodiments can be combined with one another as desired, are interchangeable and transferable to one another. Reference symbol 1 gear device 2 Supply facility 3 Gearbox cover 4 Recording 5 Guide section 6 basic bodies 7 Spring device 8 contact surface 9 Protective edge 10 Safety device 11 Securing element 12 locking element 13 Orientation element 14 Orientation shot 15 Lead recording 16 Outlet opening

Claims

[1] Gear unit (1) for an electric drive arrangement, comprising a supply unit (2) arranged in a shaft of the gear unit (1), wherein the supply unit (2) is connected to a guide section (5) with a receptacle (4) in a gear cover (3), wherein at least one spring assembly (7) is arranged between the gear cover (3) and the guide section (5), characterized by a locking device (10) designed to secure the guide section (5) in the receptacle (4) under preload of the spring device (7), wherein the locking device (10) has at least one locking element (11) for securing the supply device (2) to the gearbox cover (3) and an orientation element (13) which engages in an orientation receptacle (14) of the receptacle (4) in a mounted state of the locking device (10). [2] Gear device (1) according to claim 1, characterized by, that the supply device (2) includes an oil lance and / or an earthing lance. [3] Gear device (1) according to claim 1, characterized by , that the guide section (5) has a guide receptacle (15), wherein the orientation element (13) in the assembled state engages through the guide receptacle (15) into the orientation receptacle (14). [4] Gear unit (1) according to claim 3, characterized by , that the orientation element (13) can only be inserted into the guidance recording (15) and the orientation recording (14) in a defined circumferential orientation of the guide section (5) to the recording (4). [5] Gear unit (1) according to claim 3 or 4 , characterized by , that the guide receptacle (15) is designed as an axial opening in the guide section (5) or a recess in an outer contour of the guide section (5). [6] Gear unit (1) according to any one of the preceding claims, characterized by, that the guide section (5) has a contact surface (8) for the spring device (7) and / or a protective edge (9) which is designed to support the supply device (2), namely the guide section (5), up to a minimum length on the gearbox cover (3) when the spring device (7) is compressed. [7] Gear unit (1) according to any one of the preceding claims, characterized by , that a circumferential position of the orientation element (13) and / or the orientation recording (14) is determined depending on a circumferential position of an outlet opening (16) of the supply device (2). [8] Gear unit (1) according to any one of the preceding claims, characterized by that the guide section (5) is integrally formed with the supply device (2) or that the guide section (5) is formed separately as a plug-in section or plug-in section. [9] Electric drive arrangement comprising a transmission device (1) according to any of the preceding claims. [10] Motor vehicle comprising a transmission device (1) according to any one of claims 1 to 7 and / or an electric drive arrangement according to the preceding claim. [11] Method for manufacturing a transmission device (1) for an electric drive arrangement according to any one of claims 1 to 8, comprising a supply device (2), wherein an oil lance and / or a grounding lance is arranged in a shaft of the transmission device (1), wherein the supply device (2) is connected to a guide section (5) with a receptacle (4) in a transmission cover (3), wherein at least one spring device (7) is arranged between the transmission cover (3) and the guide section (5), characterized by, that the guide section (5) is secured in the receptacle (4) by a locking device (10) under preload of the spring device (7), wherein the locking device (10) has at least one locking element (11) for securing the supply device (2) to the gearbox cover (3) and an orientation element (13) which engages in an orientation receptacle (14) of the receptacle (4) in a mounted state of the locking device (10).

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