High-voltage coupling structure with optimized installation space
By designing the base and clamping device, the problems of large space requirements, numerous parts, and difficult assembly in the electrical connection between power electronic devices and the stator were solved, achieving a reliable and space-saving electrical connection and simplifying the assembly process.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- VOLKSWAGEN AG
- Filing Date
- 2022-07-22
- Publication Date
- 2026-06-02
AI Technical Summary
In the existing technology, the electrical connection between power electronic devices and the stator has problems such as large space requirements, a large number of parts, and difficulties in assembly and disassembly. In addition, the electrical contacts are easily affected by contamination and vibration.
A connection device is adopted, which includes a base and a clamping device. The clamping device has a threaded component. The electronic device bus and the stator bus move laterally to the clamping position along the longitudinal axis of the threaded component. Through the design of the base and the clamping device, a reliable and space-saving electrical connection is achieved.
It enables a simple and cost-effective electrical connection between power electronics and the stator, reducing space requirements and the number of parts, eliminating the need for external supply of additional threaded parts, and ensuring the reliability of the electrical connection and ease of assembly.
Smart Images
Figure CN115694047B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to a connection device for electrically connecting an electronic bus (Elektronikstromschiene) of a power electronic device to a stator bus of a motor for a motor vehicle. The invention also relates to an electric drive system for driving a motor vehicle having this type of connection device, and a method for electrically connecting an electronic bus of a power electronic device to a stator bus of a motor for a motor vehicle. Background Technology
[0002] It is known that the stator of an electric motor is electrically connected to the power electronics used to operate the motor. Furthermore, a primary goal in motor vehicle development is to reduce the size and weight of motor vehicle components. Here, the assemblability and detachability of components are particularly important considerations. Document DE102019114810A1 describes a simple electrical connection between power electronics cables and stator wires using threaded connections. Compared to busbars, cable connection structures are more susceptible to interference and more difficult to assemble.
[0003] One approach to achieving a compact structure in an electric drive is to position the contact points of the power electronics bus and the stator bus within the motor housing, gearbox mounting space, etc. This arrangement is known, for example, from document DE102019212980A1. Document DE102019200751A1 describes a direct connection between the power electronics bus and the stator bus via threaded connections. The bus correspondingly has through-guides that can be arranged coaxially to each other for introducing and securing the threaded connections.
[0004] Typically, the mechanical and electrical connections between the two busbars are only made after the motor housing and the machine housing or transmission housing have been assembled from the outside. For this purpose, one large or three smaller housing openings can be arranged in the housing, through which threaded parts can be introduced and tightened. To prevent contamination of the threaded parts, special covers are usually used to seal the housing openings at the connection point; these covers can be fastened to the housing by multiple threaded parts.
[0005] This arrangement has the following disadvantages: When the housing opening is small, introducing the threaded parts becomes difficult. If incorrectly screwed in, the threaded parts must be replaced or the entire drive and contact bridge must be disassembled and replaced. When the housing opening is large, the gap must be closed using a cover and multiple threaded parts. This makes assembly and disassembly of the components difficult.
[0006] A connection device for electrically connecting a stator to a power electronic device is known from DE102012024160A1. The connection device is cup-shaped and can be inserted into an opening in a machine housing. The stator busbars can be correspondingly inserted into a receiving portion of the connection device and correspondingly secured therein by means of externally accessible threaded fasteners. For electrical contact of the power electronic device, the connection device has a plug socket for each busbar into which a plug connected to a high-voltage cable can be inserted. Another electrical connection using a plug is known from document DE102019212980A1. This device has the following disadvantages: the electrical contact of each phase is along different engagement directions, and therefore the device has a large space requirement. Furthermore, the plug-in connection structure can be easily contaminated. In addition, there is a risk of electrical contact loss due to operational influences (e.g., vibration or mechanical shock) because the plug is incorrectly tightened in the plug socket. Summary of the Invention
[0007] Therefore, the object of the present invention is to eliminate, or at least partially eliminate, the disadvantages described above in the case of power electronics being electrically connected to the stator. In particular, the object of the present invention is to provide a connection device, electric drive system, and method for electrically connecting the electronic busbar of a power electronics device to the stator busbar of a motor for a motor vehicle, said connection device, electric drive system, and method having reduced space requirements and / or reduced number of parts and / or improved assembly in a simple and cost-effective manner.
[0008] The aforementioned task is solved according to the present invention. Therefore, the task is solved by a connection device according to the present invention for electrically connecting an electronic device busbar of a power electronic device to a stator busbar of a motor for a motor vehicle, by an electric drive system according to the present invention for driving a motor vehicle, and by a method according to the present invention for electrically connecting an electronic device busbar of a power electronic device to a stator busbar of a motor for a motor vehicle. Other features and details of the invention are derived from the description and drawings. Herein, the features and details described in conjunction with the connection device according to the present invention also apply in conjunction with the electric drive system according to the present invention and the method according to the present invention, and vice versa, so that reference is always made to or may be made to each other in respect of the disclosure of various aspects of the invention.
[0009] According to a first aspect of the invention, the task is accomplished by a connection device for electrically connecting an electronic device bus of a power electronic device to a stator bus of a stator of an electric motor for a motor vehicle. The connection device has a base and a clamping device disposed on the base for clamping the electronic device bus and the stator bus together in a clamped position at the base. According to the invention, the clamping device has a threaded element having a longitudinal axis, wherein the base is constructed and the threaded element is disposed at the base such that the electronic device bus and the stator bus can move transversely to the longitudinal axis of the threaded element into the clamped position.
[0010] Within the scope of this invention, a connecting device is understood to be a means by which an electrical connection can be established between two conductors that are constructed separately from each other. The electrical connection established by means of the connecting device can be provided, for example, via the connecting device, especially a clamping device, or directly between the conductors, especially through direct contact between the conductors.
[0011] To reliably and space-savingly connect to the motor, high-voltage power electronics have electronic busbars. For each phase of the motor, this type of power electronics typically has such electronic busbars that are electrically insulated from each other, thus allowing for targeted control of each phase.
[0012] To reliably and space-savingly connect to power electronics, motors used to drive motor vehicles have stator buses. The number of stator buses typically corresponds to the number of phases or the number of electronic busbars. The stator buses are electrically insulated from each other, allowing for targeted control of each phase.
[0013] The substrate is preferably constructed as a single piece. The substrate is preferably made of a non-conductive material. The substrate is preferably made of plastic, especially in the form of injection molding. The substrate preferably has a stable state over the operating temperature range of the power electronics and motor, thereby ensuring shape stability of the substrate during motor operation. Preferably, the substrate has a guiding device for form-fittingly restricting the relative movement of the electronic device bus and / or stator bus relative to the substrate, preferably transverse to the assembly direction of the respective electronic device bus or stator bus. This improves the movement of the respective bus into the clamping position.
[0014] The clamping device can be arranged or can be arranged at the base. According to the invention, the components of the clamping device, such as the threads for engaging the threaded member, can be integrally constructed with or fixed to the base. The threaded member is constructed as part of the clamping device. The longitudinal axis of the threaded member extends along the threaded member and defines the direction of movement of the threaded member during tightening and loosening. The coupling device preferably has such a clamping device for each phase or each pair of electronic device buses and stator buses, wherein the individual clamping devices can be constructed identically or differently. Thus, the coupling device preferably has three clamping devices.
[0015] The longitudinal axis of the threaded component is arranged transversely to, and preferably perpendicularly to, the assembly direction of the electronic device bus and the stator bus. Therefore, the electronic device bus and the stator bus can be pressed together by tightening the threaded component. In this way, a reliable electrical connection can be established between the electronic device bus and the stator bus. Preferably, the threaded component is constructed and arranged such that the movement of the electronic device bus and / or the stator bus beyond the clamping position in the respective assembly direction is form-fitted and limited.
[0016] The connection device according to the invention has the following advantages over conventional electrical connections between electronic device buses and stator buses: it enables reliable and space-saving electrical connections between the buses using simple means and in a cost-effective manner. Due to the construction of the clamping device, no additional threaded parts need to be supplied from outside the machine housing when establishing the electrical connection, thus allowing electrical connections to be made through a relatively small housing opening even when the motor housing is closed. Furthermore, the presence of threaded parts in the clamping device has the advantage that the threaded parts can be correctly engaged with the threads of the clamping device during pre-assembly. Therefore, the need for orientation of the threaded parts during the final assembly of the electric drive system with the machine housing closed can be avoided.
[0017] According to a preferred extension of the invention, the coupling device can be configured such that the base has a first inlet opening for introducing end sections of electronic device buses into the coupling device and a second inlet opening for introducing end sections of stator buses into the coupling device. The inlet openings are preferably configured for guiding, particularly for linearly guiding, the respective buses. The coupling device preferably has one first inlet opening and one second inlet opening for each phase. For a three-phase motor, the coupling device therefore preferably has three first inlet openings and three second inlet openings. In the case of a coupling device with a multi-phase configuration, the spacing between the first or second inlet opening and the threaded member corresponding to the respective phase is preferably configured differently. More preferably, the first inlet opening is arranged on a common inlet line, which is preferably configured at 90° transverse to the assembly direction of the electronic device bus. The second inlet opening is preferably arranged on a common inlet line, which is preferably configured at 90° transverse to the assembly direction of the stator bus. The three threaded members are preferably arranged in a triangular configuration at the coupling device. In this way, assembly is made easier by first bringing the electronic bus into contact with the first inlet opening. As the contact device and power electronics are further guided together, the other electronic bus can then be brought into contact with the corresponding first inlet opening. Similarly, assembly is made easier by first bringing the stator bus into contact with the second inlet opening. As the contact device and stator are further guided together, the other stator bus can then be brought into contact with the corresponding second inlet opening. This has the advantage of improving the assembly of the connecting device with the power electronics and stator using simple means and at a cost-effective manner.
[0018] According to a preferred embodiment of the invention, the first and second inlet openings are arranged and constructed such that the electronic device bus and the stator bus can move toward each other along a common axis of motion into a clamped position. The axis of motion preferably intersects the longitudinal axis of the threaded component. According to the invention, the axis of motion is a straight line. Alternatively, the common axis of motion can also be constructed parallel to each other or have a common intersection point. The common intersection point is preferably located on the longitudinal axis of the threaded component. The translational movement of the electronic device bus and the stator bus can therefore be restricted by the unfastened threaded component in a form-fit manner. This has the advantage of reducing the space requirements for the electrical connection of the power electronics and the stator using simple means and in a cost-effective manner.
[0019] More preferably, the first inlet opening and / or the second inlet opening have widening portions facing away from the clamping device. The widening portions are preferably funnel-shaped. This has the advantage of enabling simple and cost-effective improvement in the introduction and orientation of electronic device buses and stator buses.
[0020] In a particularly preferred embodiment of the invention, the coupling device may be configured such that the clamping device has a threaded sleeve arranged to translate relative to the longitudinal axis of the threaded component, wherein the electronic device bus and the stator bus can be clamped together between the threaded sleeve and the threaded component by means of the clamping device. The threaded component can be screwed into the threaded sleeve, and preferably screwed in such a way that the threaded features of the threaded component and the threaded features of the threaded sleeve engage as specified. This has the advantage that the consuming process of guiding the clamping threaded component and the internal thread can be eliminated during final assembly. The threaded sleeve is preferably guided at the base via a guiding device that can translate. The guiding device may, for example, have a guide rail, a guide wall, etc. More preferably, the clamping device has limiting devices, such as shoulders, limiting threaded components, etc., to form-fit limit the translational movement of the threaded sleeve. The clamping device is preferably set and constructed such that, in the relaxed state, the threaded sleeve is arranged outside the movement path of the bus, preferably spaced apart from the movement path. This has the advantage of preventing collisions between the bus and the threaded sleeve during bus assembly. More preferably, the clamping device is constructed and configured such that the threaded sleeve contacts the electronic bus or stator bus when the clamping device is under tension. The clamping device is preferably constructed and configured such that the threaded end of the threaded element contacts the corresponding other stator bus or electronic bus when the clamping device is under tension. The threaded sleeve and threaded element are preferably made of conductive material, thereby enabling electrical connection between the electronic bus and the stator bus via the clamping device. The threaded sleeve has the advantage of improving bus assembly and electrical connection using simple means and at a cost-effective manner.
[0021] Preferably, the base has a form-fit section for holding the threaded part in the base. The form-fit section is preferably configured to surround the head of the engaging threaded part. The form-fit section is preferably configured to secure the relative position of the threaded part with respect to the base. Alternatively, the form-fit section is preferably configured to restrict linear movement of the threaded part in the longitudinal axis direction of the threaded part. Therefore, the threaded part has limited clearance. This has the advantage of preventing collisions between the clamping device and the busbar during assembly using simple means and at a reasonable cost. The threaded part can be held in a defined position relative to the base via the form-fit section. Therefore, it also prevents the clamping device with the threaded part and threaded sleeve from falling out.
[0022] According to a second aspect of the invention, the task is accomplished by an electric drive system for driving a motor vehicle. The electric drive system has an electric motor with a rotor, a stator, and a housing, and power electronics for energizing the stator to operate the motor. The stator has a stator bus for electrical connection with the power electronics, and the power electronics have an electronic device bus for electrical connection with the stator. According to the invention, the electric drive system has a connection device according to the invention for electrically connecting the stator bus and the electronic device bus.
[0023] The motor is preferably constructed as a three-phase motor and therefore preferably has three electrically isolated stator buses. Correspondingly, the power electronics preferably have three electrically isolated electronic busbars. The stator buses and electronic busbars are respectively electrically connected in pairs to each other via clamping devices of the coupling device. Therefore, the coupling device preferably has three electrically isolated clamping devices. The coupling device is preferably held in the machine housing, preferably held in the machine housing by means of one or more retaining threads.
[0024] All the advantages described for the coupling device according to the first aspect of the invention are obtained in the electric drive system according to the invention. Therefore, the electric drive system according to the invention has the following advantages over conventional electric drive systems: reliable and space-saving electrical connections are established between the busbars using simple means and in a cost-effective manner. Due to the construction of the clamping device, no additional threaded parts need to be supplied from outside the machine housing when establishing the electrical connection, thus allowing electrical connection via a relatively small housing opening even when the motor housing is closed. Furthermore, the presence of threaded parts in the clamping device has the advantage that the threaded parts can be correctly engaged in the threads of the clamping device during pre-assembly. Therefore, the need for directional consumption of threaded parts during the final assembly of the electric drive system with the machine housing closed can be avoided.
[0025] According to a preferred embodiment of the invention, in an electric drive system, the electronic device bus and / or the stator bus may be configured to have elongated holes opening toward the ends of the bus for engagement with a clamping device in order to move into a clamping position. Thus, the end sections of the electronic device bus or stator bus preferably have a forked configuration. The width of the elongated hole is preferably coordinated with the thread diameter of the threaded component of the clamping device, and substantially corresponds to the thread diameter of the threaded component of the clamping device for better assemblability and reliable orientation. The clamping device and the electronic device bus or stator bus are preferably constructed and arranged such that the rod section of the threaded component is arranged within the elongated hole in the clamping position. This rod section is preferably unthreaded, but may also be threaded. Preferably, the threaded component contacts the end wall of the elongated hole in the clamping position, thereby fixing the clamping position via a shape-fitting interaction between the threaded component and the elongated hole. The opening of the elongated hole preferably has a widening portion to improve the movement of the elongated hole onto the threaded component. This has the following advantages: it allows for further improvement of the electric drive system assembly using simple means and in a cost-effective manner.
[0026] Particularly preferably, the machine housing has a housing opening to guide a tool for rotating the threaded part of the clamping device about the longitudinal axis of the threaded part. The housing opening has such a large diameter that the tool for rotating the threaded part can be guided through the housing opening, wherein the smallest possible diameter of the housing opening according to the invention is preferred. The housing opening is preferably arranged coaxially with the longitudinal axis of the threaded part. The housing opening preferably has a diameter smaller than the diameter of the threaded part head of the threaded part. This prevents the threaded part from being completely disassembled when the machine housing is closed. The housing opening is preferably closed by means of a sealing device. The sealing device is preferably constructed as a plug, cover, etc. More preferably, the sealing device is fastened to the machine housing, especially screwed onto the machine housing, or screwed in by its own threads. This has the advantage of improving the assembly of the electric drive system using simple means and in a cost-effective manner.
[0027] According to a third aspect of the invention, the task is accomplished by a method for electrically connecting an electronic bus of a power electronic device to a stator bus of a stator of an electric motor for a motor vehicle. The method comprises the following steps:
[0028] - The connecting device according to the invention is arranged inside the machine housing of the motor.
[0029] -Introduce the end section of the electronic device bus into the clamping device until it is in the clamped position.
[0030] - Introduce the end section of the stator busbar into the clamping device until it is in the clamped position.
[0031] - The clamping device is operated from the outside through the housing opening of the machine housing in such a way that the electronic device busbar and the stator busbar are clamped in the clamped position, and
[0032] -The opening of the housing is sealed by means of a sealing device, and
[0033] - Lock the sealing device in the machine housing.
[0034] According to the invention, the connection device can be first inserted into the electronic device bus or stator bus, and then assembled together with the corresponding component into the machine housing. The connection device is preferably fastened to the machine housing.
[0035] The method according to the invention yields all the advantages already described for the connection device according to the first aspect of the invention and for the electric drive system according to the second aspect of the invention. Therefore, the method according to the invention has the advantage over conventional methods: it enables the establishment of reliable and space-saving electrical connections between busbars using simple means and in a cost-effective manner. Due to the construction of the clamping device, no additional threaded parts need to be supplied from outside the machine housing when establishing the electrical connection, thus allowing for electrical connection via a relatively small housing opening even when the motor housing is closed. Furthermore, the presence of threaded parts in the clamping device has the advantage that the threaded parts can be correctly engaged in the threads of the clamping device during pre-assembly. Therefore, the need for directional adjustments of the threaded parts during the final assembly of the electric drive system when the machine housing is closed can be avoided. Attached Figure Description
[0036] The connecting device according to the invention, the electric drive system according to the invention, and the method according to the invention are explained in more detail below with reference to the accompanying drawings. Accordingly, schematically:
[0037] Figure 1 A perspective view shows a connecting device according to a preferred embodiment of the present invention.
[0038] Figure 2 Shown in perspective Figure 1 a part,
[0039] Figure 3 A perspective view shows the assembly process of the electronic device bus and stator bus. Figure 1 The connecting device,
[0040] Figure 4 A portion of the electric drive system according to a preferred first embodiment of the present invention is shown in cross-sectional view, and
[0041] Figure 5 A preferred embodiment of the method according to the present invention is illustrated by a flowchart. Detailed Implementation
[0042] Components with the same function and mode of operation Figures 1 to 5 The same reference numerals are provided accordingly in the accompanying drawings.
[0043] exist Figure 1 The connecting device 1 according to a preferred first embodiment of the present invention is schematically depicted in perspective view. The connecting device 1 has a base 4, on which three clamping devices 5 are arranged, each clamping device correspondingly having a threaded element 6 (the threaded element having a longitudinal axis 7) and a threaded sleeve 11 (the threaded sleeve engages with an external thread, not shown, of the threaded element 6). The threaded element 6 correspondingly has a threaded head 18 and a threaded rod 19, wherein an external thread, not shown, is constructed at the threaded rod 19. For each clamping device 5, the base 4 has an electronic device bus 2, not shown, for introducing power electronic devices (see [reference needed]). Figure 3 The first inlet opening 8 and the stator busbar 3 (not shown) for introducing the stator (see) Figure 3 The second inlet opening 9. The clamping device 5 is configured to mechanically and electrically connect the electronic device bus 2 to the stator bus 3.
[0044] Figure 2 Suggested schematically in perspective view Figure 1 The threaded head 18 is held in a form-fitting manner by the form-fitting section 12 of the base 4 and is therefore locked to prevent independent movement along the longitudinal axis 7 of the threaded part, for example, due to the weight of the threaded part 6 and the threaded sleeve 11, or due to bumps, vibrations, mechanical impacts, etc. Furthermore, the form-fitting section 12 is constructed such that the force generated when tightening the threaded part 6 yields along the longitudinal axis 7 of the threaded part, for example, through elastic bending, bending, breaking, etc., and thus releases the threaded head 18 to further tighten the clamping device 5. For this purpose, the form-fitting section 12 has an inclined sliding surface for sliding the threaded head 18. The threaded rod 19 extends along the longitudinal axis 7 of the threaded part.
[0045] Figure 3 This illustrates the assembly process of electronic bus 2 and stator bus 3. Figure 1 The connecting device 1. The electronic device bus 2 has an end section E with an elongated hole 15 for surrounding the threaded part 6 that engages with the connecting device 1. The stator bus 3 also has an end section E with an elongated hole 15 for surrounding the threaded part 6 that engages with the connecting device 1. In order to be fitted at the connecting device 1, the electronic device bus 2 and the stator bus 3 can move from opposite sides along the axis of motion B in the direction of the threaded part 6.
[0046] exist Figure 4A portion of an electric drive system 13 according to a preferred first embodiment of the invention is schematically depicted in cross-sectional view. The electric drive system 13 has a housing 14 in which the coupling device 1 according to the invention is arranged. In this view, an electronic device bus 2, not further shown, of power electronics disposed outside the housing 14, is introduced from the outside into the housing 14 along the axis of motion B and through a first introduction opening 8, and is positioned in a clamping position K at the clamping device 5 of the coupling device 1. A threaded rod 19 is thus arranged in an elongated hole 15 in the electronic device bus 2. From the opposite direction, a stator bus 3, not further shown, of the stator disposed within the housing 14, is introduced along the axis of motion B through a second introduction opening 9 and is positioned in a clamping position K at the clamping device 5. A threaded rod 19 is thus arranged in an elongated hole 15 in the stator bus 3. Corresponding shoulders 22 are constructed at the threaded sleeve 11 of the base 4 and the clamping device 5. These shoulders, in a coordinated manner, prevent the threaded sleeve 11 from falling downwards in this view when the threaded component 6 is removed. It can also be seen that the first inlet opening 8 and the second inlet opening 9 have corresponding widenings 10, pointing away from the clamping device 5, to facilitate the assembly of the electronic device busbar 2 and the stator busbar 3 at the coupling device 1. The widenings 10 are funnel-shaped. The threaded component 6 can be tightened and loosened externally using tools via the housing opening 16 of the machine housing 14. The housing opening 16 is closed by means of a closing device 17, which is locked or secured to the machine housing 14 via a locking thread 20.
[0047] exist Figure 5 The flowchart schematically illustrates a preferred embodiment of the method according to the invention. In the first method step 100, the coupling device 1 according to the invention is arranged in the internal space of the machine housing 14 of the motor. In the second method step 200, the end section E of the electronic device bus 2 is introduced into the clamping device 5 via the first inlet opening 8 and arranged in the clamping position K. In the clamping position K, the end wall of the elongated hole 15 of the electronic device bus 2 preferably contacts the threaded part 6 of the coupling device 1. According to the invention, the second method step 200 may also be performed before the first method step 100. In this case, the coupling device 1 is arranged together with the electronic device bus 2 in the internal space of the machine housing 14. In the third method step 300, the end section E of the stator bus 3 is introduced into the clamping device 5 via the second inlet opening 9 and arranged in the clamping position K. In the clamping position K, the end wall of the elongated hole 15 of the stator bus 3 preferably contacts the threaded part 6 of the coupling device 1. The end regions of the electronic device bus 2 and the stator bus 3 overlap each other and are arranged between the threaded head 18 and the threaded sleeve 11 of the threaded component.
[0048] In the fourth method step 400, the clamping device 5 is manipulated from the outside through the housing opening 16 of the machine housing 14 such that the electronic bus 2 and the stator bus 3 are clamped in the clamping position K between the threaded head 18 and the threaded sleeve 11. This manipulation involves tightening the threaded part 6. This ensures the electrical connection between the electronic bus 2 and the stator bus 3. The electrical connection is established, for example, via the clamping device 5, especially the threaded part and the threaded sleeve, and / or directly through the mutual contact between the electronic bus 2 and the stator bus 3. In the fifth method step 500, the housing opening 16 is closed by means of the sealing device 17, thereby protecting the internal space from external influences, preferably from dust, dirt, water, etc. In the sixth method step 600, the sealing device 17 is locked in the machine housing 14. This is preferably achieved by means of the locking threaded part 20.
[0049] List of reference numerals in the attached diagram:
[0050] 1 Connection device
[0051] 2 Electronic Device Buses
[0052] 3 stator busbars
[0053] 4 matrix
[0054] 5 clamping devices
[0055] 6 threaded parts
[0056] 7. Longitudinal axis of threaded parts
[0057] 8 First introduction opening
[0058] 9 Second introduction opening
[0059] 10 Widening Section
[0060] 11 Threaded Sleeve
[0061] 12 shape matching sections
[0062] 13 Electric Drive System
[0063] 14 Machine casing
[0064] 15 long holes
[0065] 16 shell openings
[0066] 17. Enclosure device
[0067] 18 threaded parts head
[0068] 19 Threaded Rod
[0069] 20 Locking threaded parts
[0070] 21 Guiding Device
[0071] 22 shoulder
[0072] 23 sliding surfaces
[0073] 100 First Method Steps
[0074] 200 Second Method Steps
[0075] 300 Third Method Steps
[0076] 400 Fourth Process Step
[0077] 500 Fifth Method Steps
[0078] 600 Sixth Method Steps
[0079] B Motion Axis
[0080] E end section
[0081] K clamping position.
Claims
1. A connecting device (1) for electrically connecting an electronic bus (2) of a power electronic device to a stator bus (3) of a stator of a motor for a motor vehicle, the connecting device having a base (4) and a clamping device (5) disposed on the base (4), the clamping device being used to clamp the electronic bus (2) and the stator bus (3) together in a clamping position (K) on the base (4). Its features are, The clamping device (5) has a threaded element (6) having a threaded longitudinal axis (7), wherein the base (4) is constructed and the threaded element (6) is arranged at the base (4) such that the electronic device bus (2) and the stator bus (3) can move laterally to the clamping position (K) along the threaded longitudinal axis (7), and The substrate (4) has a first inlet opening (8) for introducing the end section (E) of the electronic device bus (2) into the coupling device (1) and a second inlet opening (9) for introducing the end section (E) of the stator bus (3) into the coupling device (1). The first inlet opening (8) and the second inlet opening (9) have widening portions (10) pointing away from the clamping device (5).
2. The connecting device (1) according to claim 1, characterized in that, The first inlet opening (8) and the second inlet opening (9) are arranged and constructed such that the electronic device bus (2) and the stator bus (3) can move toward each other along a common axis of motion (B) into a clamping position (K).
3. The connecting device (1) according to any one of the preceding claims, characterized in that, The clamping device (5) has a threaded sleeve (11) arranged to translate relative to the longitudinal axis (7) of the threaded component, wherein the electronic device bus (2) and the stator bus (3) can be clamped together between the threaded sleeve (11) and the threaded component (6) by means of the clamping device (5).
4. The connecting device (1) according to claim 1 or 2, characterized in that, The base (4) has a form-fitting section (12) for holding the threaded part (6) at the base (4).
5. An electric drive system (13) for driving a motor vehicle, the electric drive system having a motor with a rotor, a stator and a machine housing (14) and power electronics for energizing the stator to operate the motor, wherein, The stator has a stator bus (3) for electrical connection with the power electronic device, and the power electronic device has an electronic device bus (2) for electrical connection with the stator. Its features are, The electric drive system (13) has a connection device (1) according to any one of the preceding claims for electrically connecting the stator bus (3) to the electronic device bus (2).
6. The electric drive system (13) according to claim 5, characterized in that, The electronic device bus (2) and / or the stator bus (3) have elongated holes (15) opening toward the end of the bus in order to move to the clamping position (K) and engage with the clamping device (5).
7. The electric drive system (13) according to claim 5 or 6, characterized in that, The machine housing (14) has a housing opening (16) to guide a tool through which a threaded part (6) for rotating the clamping device (5) about the longitudinal axis (7) of the threaded part.
8. A method for electrically connecting an electronic bus (2) of a power electronic device to a stator bus (3) of a stator for a motor vehicle, the method comprising the steps of: - The connecting device (1) according to any one of claims 1 to 4 is arranged in the internal space of the machine housing (14) of the motor. - Introduce the end section (E) of the electronic device bus (2) into the clamping device (5) until it is in the clamping position (K). - Introduce the end section (E) of the stator busbar (3) into the clamping device (5) until it is in the clamping position (K). - The clamping device (5) is manipulated from the outside through the housing opening (16) of the machine housing (14) such that the electronic device bus (2) and the stator bus (3) are clamped in the clamping position (K), and -The housing opening (16) is closed by means of a sealing device (17), and - Lock the sealing device (17) at the machine housing (14).