JP2023018499A - Vehicle driving device - Google Patents

Abstract

To provide a vehicle driving device having PCU and T/A which can connect a terminal for MG while preventing a foreign matter from intruding into a DCDC converter of the PCU between the PCU and the T/A.MEANS FOR SOLVING THE PROBLEM: A vehicle driving device having PCU and T/A includes: a cover (3) with a gasket which is arranged between the PCU and the T/A and has a penetration part (10) provided at a position not overlapping a DCDC converter of the PCU; and a terminal (12) for an MG for electrically and mutually connecting between the PCU and the T/A through the penetration part.SELECTED DRAWING: Figure 1

Description

The present invention provides a HEV (Hybrid Electric Vehicle), a PHEV (Plug-in HEV), an FCEV (Fuel Cell Electric Vehicle), or a BEV (Battery Electric Vehicle), which has a cover to prevent foreign matter such as dust and metal foreign matter from entering. The present invention relates to the technical field of driving devices for vehicles such as vehicles.

As a cover used for this type of vehicle driving device, a gasket-equipped cover has been proposed in which a dust-preventing cover body and a sealing gasket are integrally formed (see Patent Document 1).

JP-A-2000-213651

However, according to the above Patent Document 1, when trying to apply the cover by the technology between a PCU (Power Control Unit) and a T/A (TransAxle), DCDC (direct current-direct current) of the PCU There is a technical problem that it is difficult or impossible to connect MG (Motor Generator) terminals inside and outside the cover while ensuring the prevention of foreign matter from entering the converter.

The present invention has been made in view of the above-described technical problems, for example, and drives a vehicle having a structure that allows connection of MG terminals while preventing foreign matter from entering the DCDC converter of the PCU between the PCU and the T/A. An object is to provide an apparatus.

In order to solve the above problems, one aspect of the vehicle drive system according to the present invention is a vehicle drive system having a PCU and a T/A, wherein the PCU is disposed between the PCU and the T/A. a cover with a gasket provided with a through-hole at a position that does not overlap the DCDC converter; and an MG terminal that electrically connects the PCU and the T/A through the through-hole. and

According to one aspect of the vehicle drive system of the present invention, the cover with a gasket can prevent foreign matter from entering the DCDC converter of the PCU. At the same time, it becomes possible to electrically connect the PCU and the T/A with the MG terminal through the through portion provided in the gasketed cover.

Such functions and effects of the present invention will be made clearer by the embodiments of the invention described below.

1 is a perspective view showing the overall configuration of a gasket-equipped cover included in a vehicle drive system according to an embodiment; FIG. FIG. 2 is a schematic block diagram showing the overall configuration of the vehicle drive system according to the embodiment when completed (that is, in a state in which a gap between the PCU and the T/A is covered with a cover with a gasket and the MG terminals are already connected). FIG. 4 is a schematic block diagram showing the overall configuration of the vehicle drive system according to the embodiment when the PCU is replaced (that is, the gasket-equipped cover, the PCU and the T/A are separated from each other, and the MG terminal is not connected); be.

An embodiment of a vehicle drive system according to the present invention will be described with reference to FIGS. 1 to 3. FIG.

As shown in FIG. 1, the gasketed cover 3 has a generally rectangular tray-like basic shape with raised and flattened edges (i.e., edges facing upward in FIG. 1) A plurality of mounting holes 3a for mounting the gasket-equipped cover 3 are provided at corners and sides of the substantially rectangular shape in plan view.

The seal line 4 is formed by joining a line formed by shaping an iron plate to the edge of the cover with gasket 3 (that is, the edge facing upward in FIG. 1), and synthetic rubber or synthetic resin (for example, It is provided by coating a rubber layer containing a synthetic resin elastomer). In addition, when the main body of the gasket-equipped cover 3 (that is, the bottom plate, the side walls, etc.) is manufactured from a relatively inexpensive metal, such as an iron plate, which tends to generate metallic foreign matter, the above-mentioned material may be applied to the surface of the metal. It is possible to reduce or prevent the occurrence of metal foreign matter from the gasketed cover 3 by coating the rubber layer containing

The gasket-equipped cover 3 is attached so as to be firmly sandwiched between the PCU and the T/A using the mounting hole 3a (see FIGS. 2 and 3) as will be described in detail later. configured to function as a cover. A hole 10 for terminal connection is opened in the bottom surface of the cover 3 with gasket as an example of a "through portion". The hole 10 penetrates the floor plate of the gasket-equipped cover 3 at a position closer to the left front in FIG. However, the shape of the opening of the hole 10 may be a rectangle such as a rectangle or a square, or may be divided into a plurality of sections. Particularly in this embodiment, the hole 10 is positioned so as not to overlap the DCDC converter of the PCU as will be described later. For example, in the case of an HEV, a hole 10 may be provided in front of the vehicle and on the left side of the vehicle as a position that does not overlap the DCDC converter.

As shown in FIG. 2, the gasket-equipped cover 3 is arranged between the PCU 1 and the T/A 2 when the vehicle drive system is completed. The PCU 1 and the T/A 2 are electrically connected to each other by a plurality of MG terminals 12 via holes 10 (see FIG. 1) in the gasketed cover 3 inside them.

The PCU 1 has a DCDC converter 1a in addition to a processor, memory, electronic parts, electronic elements, etc., and during its operation controls the overall power of the vehicle's driving device and supplies power for the MG to the T/A 2. is configured as The T/A 2 is a power transmission mechanism in which a transmission and a differential are integrated, and is configured such that a DC power source or the like from the DCDC converter 1a is supplied from the PCU 1 side through a plurality of terminals 12 for MG.

As shown in FIG. 3, when replacing the PCU 1 in the drive system of the vehicle, the gasketed cover 3 and the PCU 1 and T/A 2 are separated from each other in the vertical direction in the figure, and the PCU 1 and T/A 2 are mutually connected via the hole 10. The connected terminal 12 for MG is brought into a non-connected state.

2 and 3, the PCU 1 is constructed so as to be housed in a single metal housing (in other words, a PCU case) having a partial or almost no lower wall surface, and the T/A 2 is shown in FIGS. It is built in such a way that it is accommodated in another metal case (in other words, T/A case) with the upper wall partially or almost absent, and when it is in the completed state of FIG. 2, it has PCU1 and T/A2. The driving device of the vehicle is housed in one sealed metal case (in other words, PCU and T/A case) with a gasket-equipped cover 3 interposed therebetween, that is, a so-called "mechanical and electrical integrated structure". is constructed as

Since it is configured as described above, the gasket-equipped cover 3 plays a role of a sealing material to prevent rainwater or the like from entering from the joint between the PCU 1 and the T/A 2 .

Furthermore, the gasketed cover 3 also serves to prevent bumps when the PCU 1 and T/A 2 are assembled from FIG. 3 to the state of FIG. More specifically, if the cover with gasket 3 were not provided, there would be electric parts, electronic elements, wiring, etc., protruding from the PCU 1 during assembly work at a vehicle factory or a vehicle dealer for replacement work of the PCU 1. And it is easy to hit the outside. Furthermore, when replacing the PCU1, it is difficult or impossible to remove only the PCU1. However, in this embodiment, since the PCU 1 is covered with the cover 3 with a gasket, it is possible to effectively prevent such a collision during assembly. In addition, since the MG cable, PCU mounting bracket, lower cover, adhesive, etc. are not required, this embodiment is advantageous in terms of assembly work.

For example, if the drive system of the vehicle is a HEV, a hole 10 may be provided on the front and left sides of the vehicle. , a tool for connecting the MG terminal 12 and the MG can be inserted from the left side of the vehicle.

Furthermore, the gasket-equipped cover 3 serves as a cover for preventing foreign matter from entering the PCU 1 and the T/A 2, particularly for preventing foreign matter such as metallic foreign matter from entering the DCDC converter 1a from the T/A 2 side. Such foreign matter includes, for example, foreign matter remaining when the housing of the T/A (that is, the T/A case described above) is cut, foreign matter that adheres during transportation, and the like. If an electronic component or the like constituting the PCU is mounted on the foreign matter unless some measures are taken, the foreign matter may be lifted up by vibration during running and adhere to the electronic component. However, in the present embodiment, the cover 3 with the gasket functions as a cover for preventing foreign matter from entering, so that adhesion of such foreign matter can be prevented extremely effectively.

As described above, the sealing line 4 is provided on the edge of the gasket-equipped cover 3 serving as the sealing surface by coating a rubber layer on the line formed by shaping the steel plate. Therefore, the above-mentioned three functions of the sealing function, the function of preventing foreign matter from entering, and the function of preventing collision during assembly are more nearly perfect. Electrical and electronic devices such as the DCDC converter 1a (or an inverter (not shown)) included in the PCU 1 are susceptible to metallic foreign matter, so the above configuration of the present embodiment is very advantageous in practice.

In addition, by having a structure that prevents the intrusion of metallic foreign matter as described above, there is no need to manufacture the main body of the cover with gasket 3 using an expensive metal such as a magnesium alloy that generates less foreign matter (for example, It is also possible to manufacture using an inexpensive iron plate), which is advantageous in terms of manufacturing cost. Alternatively, even if the gasket and the cover are separate items, adoption of the integral gasket-equipped cover 3 is advantageous in terms of manufacturing cost. In addition, since the MG cable, PCU mounting bracket, lower cover, adhesive, etc. are unnecessary, this embodiment is advantageous in terms of manufacturing cost.

According to this embodiment, as shown in FIGS. 2 and 3, the gasketed cover 3 has a hole 10 (see FIG. 1) at a position not overlapping the DCDC converter 1a. Therefore, the gasketed cover 3 can prevent foreign matter from entering the DCDC converter 1a. An electrical connection between the PCU1 and the T/A2 is made possible.

Additional Notes The following additional notes are disclosed with respect to the above-described embodiments.
[Appendix 1]

A vehicle driving device according to appendix 1 of the present invention is a vehicle driving device having a PCU and a T/A, and is arranged between the PCU and the T/A, and is connected to a DCDC converter of the PCU. a cover with a gasket provided with a through-hole at a position where it does not come into contact with the MG terminal; and an MG terminal electrically connecting the PCU and the T/A through the through-hole.

According to the vehicle drive device described in appendix 1, the cover with the gasket can prevent foreign matter from entering the DCDC converter. At the same time, the electricity between the PCU and the T/A by the MG terminal is passed through a through-hole (that is, a terminal through-hole, through-hole or through-hole) provided in the gasketed cover at a position that does not overlap the DCDC converter. connection is possible.
[Appendix 2]

In the vehicle driving device described in Supplementary Note 2, one housing in which the PCU is housed and another housing in which the T/A is housed are assembled together via the cover with a gasket to form one housing. 1. The vehicle driving device according to appendix 1, characterized in that it is constructed as follows.

According to the vehicle driving device described in Supplementary Note 2, it is constructed as an electromechanical integrated structure that is excellent in three functions, ie, a sealing function, a foreign matter intrusion prevention function, and a collision prevention function during assembly.
[Appendix 3]

The vehicle driving device according to appendix 3 is the vehicle according to appendix 1 or 2, wherein the cover with gasket has a cover main body made of a metal plate and a rubber layer coated on the surface of the metal plate. drive device.

According to the vehicle drive device described in appendix 3, a relatively inexpensive metal such as an iron plate is used as the main body of the gasketed cover, and the rubber layer coating reduces the generation of metallic foreign matter from the gasketed cover. Or it becomes preventable.
[Appendix 4]

In the vehicle driving device according to appendix 4, the gasket-equipped cover has a basic shape of a substantially rectangular tray as a whole, and the raised and flattened edges are coated with a rubber layer on the upper surface. 4. The vehicle drive device according to any one of Appendices 1 to 3, characterized by having a seal line.

According to the vehicle driving device described in Supplementary Note 4, by adopting the seal line, it is possible to construct a device that is more excellent in the three functions of the sealing function, the foreign matter intrusion prevention function, and the collision prevention function during assembly.

The present invention can be modified as appropriate within the scope not contrary to the gist or idea of the invention that can be read from the scope of claims and the entire specification, and vehicle drive systems that involve such modifications are also included in the technical concept of the present invention. be

1……PCU (Power Control Unit)
1a... DCDC converter 2... T/A (Transaxle)
3... Cover with gasket 4... Seal line 10... Penetration part 12... Terminal for MG

Claims (1)

A drive device for a vehicle having a power control unit and a transaxle,
a cover with a gasket disposed between the power control unit and the transaxle and having a through portion provided at a position not overlapping the DCDC converter of the power control unit;
a motor-generator terminal that electrically connects the power control unit and the transaxle to each other through the through portion.

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