JP7081509B2 - Combine device - Google Patents

Description

The technique disclosed herein relates to a coalescing device in which a first device and a second device are coupled with their respective openings facing each other.

Patent Document 1 discloses a device in which a power control unit (PCU) is combined with a motor case. The motor is housed in the motor case. The PCU is a device that converts battery power into motor drive power. The motor case and PCU are mechanically connected, and the motor and PCU in the motor case are electrically connected. In Patent Document 1, a device in which a PCU is combined with a motor case is referred to as an integrated unit. In the present specification, a device in which two devices are united is referred to as a united device.

In the integrated unit (combined device) of Patent Document 1, a connector (motor side connector) is provided on the surface of the motor case facing the PCU, and a connector (PCU side connector) is also provided on the surface of the PCU facing the motor case. Is provided. When the PCU is combined with the motor case, the terminals of the PCU-side connector and the terminals of the motor-side connector come into contact with each other, and the terminals are electrically connected to each other.

Japanese Unexamined Patent Publication No. 2016-140200

When the current flowing between the motor (first device) and PCU (second device) of the motor case is large, you want to not only contact the terminals of the first device and the terminals of the second device, but also firmly fasten them with bolts. In some cases. In that case, the first device is provided with a first terminal having a flat fastening surface, and the second device is provided with a second terminal extending toward the first terminal. The second terminal also has a flat fastening surface. When the second device is aligned with the first device, the fastening surface of the first terminal and the fastening surface of the second terminal face each other. Bolt holes are provided in each fastening surface, and the fastening surfaces are bolted together through a service hole provided in the case of the first device.

When connecting the second device to the first device, the second device must be brought closer to the first device in an accurate trajectory so that the second terminal does not interfere with the first terminal. In order to align the relative positions between the two devices to be connected, a method is adopted in which one device is provided with a positioning pin, the other device is provided with a fitting hole, and the two devices are fitted together. The length of the positioning pin is set longer than the distance from the position where the first terminal and the second terminal start to interfere with each other when the second device is brought closer to the first device until the first device and the second device are connected. Will be done. If the positioning pin fits into the fitting hole, the position of the second device is constrained by the fitting between the positioning pin and the fitting hole, so that the second device can be brought closer to the first device in an accurate trajectory. The present specification provides a technique for avoiding interference between the first terminal and the second terminal regardless of the positioning pin when the first device and the second device are combined. If interference between the first terminal and the second terminal is avoided, the positioning pin may be fitted into the fitting hole immediately before the second device comes into contact with the first device, so that the length of the positioning pin can be shortened. can.

The coalescing device disclosed herein is a device in which a first device having a first opening and a second device having a second opening are connected to the first opening with the second opening facing each other. Is. This combined device is a pair of a first terminal provided in the first device, a second terminal provided in the second device, and one each of the first device and the second device. It has a protrusion. The first terminal has a first fastening surface facing a direction intersecting the alignment direction of the first device and the second device. The second terminal extends toward the first terminal and has a second fastening surface facing the first fastening surface. The pair of protrusions are arranged so as to face each other when the tip of the second terminal reaches the first terminal when the second device is connected to the first device. The pair of protrusions are arranged so that the opposing tips of the pair of protrusions overlap each other when viewed from the alignment direction (the alignment direction of the first device and the second device) with the first fastening surface in contact with the second fastening surface. Has been done. The distance from the first terminal to the protrusion on the first device side is longer than the distance from the tip of the second terminal to the edge of the protrusion on the second device side on the first terminal side, and the distance from the tip of the second terminal to the second device It is set to be shorter than the distance from the first terminal of the protrusion on the side to the edge on the far side.

According to the above configuration, when the second device is brought closer to the first device, the pair of protrusions interfere with each other when the tip of the second terminal is close enough to interfere with the first terminal, and the second terminal. The second device moves in the direction away from the first terminal. Therefore, the second device can be brought closer to the second device without the first terminal and the second terminal interfering with each other. It is possible to avoid interference between the first terminal and the second terminal when the first device and the second device are combined without requiring a long positioning pin.

Details and further improvements to the techniques disclosed herein will be described in the "Modes for Carrying Out the Invention" section below.

It is a side view of the united apparatus (motor system) of an Example. It is sectional drawing along the line II-II of FIG. 1 (partial sectional view). It is sectional drawing which separated the control device and a transaxle (partial sectional view). It is sectional drawing which showed the middle of approaching a control device to a transaxle (1). It is sectional drawing which showed the middle of approaching a control device to a transaxle (2). It is sectional drawing which showed the middle of approaching a control device to a transaxle (3).

The uniting device of the embodiment will be described with reference to the drawings. The coalescing device of the embodiment is a motor system 2 mounted on an electric vehicle. The motor system 2 is a device in which a control device 10 in which a drive circuit 19 for driving the motor 29 is incorporated is combined with a transaxle 20 accommodating the motor 29. FIG. 1 shows a side view of the motor system 2. The control device 10 is fixed on the transaxle 20. In FIG. 1, the drive circuit 19 and the motor 29 are schematically drawn with a broken line rectangle.

The first terminal 13 extending from the drive circuit 19 is connected to the second terminal 23 extending from the motor 29. A motor drive current of, for example, 50 amperes or more flows through the first terminal 13 and the second terminal 23. Therefore, the first terminal 13 and the second terminal 23 are firmly fixed by the bolt 3. The motor 29 is a three-phase AC motor, and in addition to the first terminal 13 and the second terminal 23, two other sets of terminals for connecting the drive circuit 19 and the motor 29 are provided, but their illustrations are omitted. is doing. In this embodiment, in order to explain the connection structure between the first terminal 13 and the second terminal 23, the first terminal 13 and the second terminal 23 are drawn in a large shape by deforming them. In addition, parts unnecessary for explanation are omitted from the illustration.

The first terminal 13 and the second terminal 23 are fastened with bolts 3 after connecting the case 11 of the control device 10 and the housing 21 of the transaxle 20. Therefore, the case 11 of the control device 10 is provided with the service hole 12. The service hole 12 is provided so that the fastening position of the first terminal 13 and the second terminal 23 can be seen from the outside. After connecting the case 11 and the housing 21, the bolt 3 and the tool (not shown) are inserted from the service hole 12 and the first terminal 13 is fastened to the second terminal 23. After fastening the first terminal 13 and the second terminal 23, the service hole is closed with a cover, but the cover is not shown in the figure.

FIG. 2 shows a cross-sectional view of the motor system 2 along the line II-II of FIG. FIG. 2 is a partial cross-sectional view of the periphery of the fastening portion between the first terminal 13 and the second terminal 23. FIG. 3 shows a cross-sectional view of the transaxle 20 and the control device 10 separated from each other. 2 and 3 are cross-sectional views of the motor system 2 cut along a plane crossing the first terminal 13 and the second terminal 23.

In the control device 10 and the transaxle 20, the opening 11a of the case 11 of the control device 10 and the opening 21a of the housing 21 of the transaxle 20 are coupled to face each other. The Z direction of the coordinate system in the figure is the alignment direction of the control device 10 and the transaxle 20. Hereinafter, the alignment direction of the control device 10 and the transaxle 20 is simply referred to as “arrangement direction”.

The first terminal 13 included in the control device 10 has a first fastening surface 13a orthogonal to the arrangement direction (see FIG. 3). The second terminal 23 of the transaxle 20 extends toward the first terminal 13 and has a second fastening surface 23a facing the first fastening surface 13a. The "arrangement direction" is the Z direction of the coordinate system in the drawing, and the first fastening surface 13a faces the Y direction orthogonal to the Z direction.

The control device 10 is brought closer to the transaxle 20 along the alignment direction. When the opening 21a of the housing 21 of the transaxle 20 comes into contact with the opening 11a of the case 11 of the control device 10, the second fastening surface 23a of the second terminal 23 comes into contact with the first fastening surface 13a of the first terminal 13. The first terminal 13 is provided with a bolt hole 13b, and the second terminal 23 is provided with a bolt hole 23b. When the housing 21 is coupled to the case 11 and the first fastening surface 13a abuts on the second fastening surface 23a, the bolt hole 13b of the first terminal 13 and the bolt hole 23b of the second terminal 23 match, and the bolt 3 is inserted. become able to.

A positioning pin 4 is provided around the opening 21a of the housing 21, and a fitting hole 5 is provided at a position corresponding to the positioning pin 4 of the opening 11a of the case 11. The housing 21 is provided with a plurality of positioning pins and the case 11 is provided with a plurality of fitting holes, but in the figure, only one positioning pin 4 and one corresponding fitting hole 5 are shown. ing. When aligning the case 11 with the housing 21, the case 11 is brought closer to the housing 21 so that the positioning pin 4 is inserted into the fitting hole 5. After the positioning pin 4 is inserted into the fitting hole 5, the case 11 approaches the housing 21 in a straight line in a planned trajectory.

The first terminal 13 is supported by a resin terminal support base 14. The terminal support base 14 supports the back side of the first fastening surface 13a of the first terminal 13. The terminal support base 14 is provided with a screw hole 14a to which the bolt 3 is fastened. The terminal support base 14 extends toward the second terminal 23 with respect to the first terminal 13.

The second terminal 23 is supported by a resin terminal support portion 24. The second terminal 23 extends to a side closer to the first terminal 13 than the terminal support portion 24.

The terminal support base 14 is provided with a protrusion 15, and the terminal support portion 24 is provided with a protrusion 25. The protrusion 15 is located closer to the second terminal 23 than the first terminal 13, and protrudes toward the second terminal 23. The protrusion 25 is located on the side farther from the first terminal 13 than the second terminal 23, and protrudes toward the first terminal 13.

The pair of protrusions 15 and 25 are arranged so as to face each other when the tip of the second terminal 23 reaches the first terminal 13 when the control device 10 is coupled to the transaxle 20. When the control device 10 is coupled to the transaxle 20, if the tip of the second terminal 23 comes into contact with the tip of the first terminal 13, the second terminal 23 may bend. The pair of protrusions 15 and 25 are provided for the purpose of preventing interference between the second terminal 23 and the first terminal 13 when the control device 10 is brought close to the transaxle 20.

The positional relationship between the pair of protrusions 15 and 25 is as follows. (1) The pair of protrusions 15 and 25 are the pair of protrusions 15 and 25 when viewed from the arrangement direction with the first fastening surface 13a of the first terminal 13 in contact with the second fastening surface 23a of the second terminal 23. The opposite tips of the above are arranged so as to overlap each other. The distance dA in FIG. 2 indicates the overlapping range of the pair of protrusions 15 and 25 when viewed from the arrangement direction. (2) In the pair of protrusions 15 and 25, the distance L1 from the first terminal 13 to the protrusion 15 is longer than the distance L2 from the tip of the second terminal 23 to the edge 25a on the first terminal 13 side of the protrusion 25. It is arranged so as to be shorter than the distance L3 from the tip of the second terminal 23 to the edge 25b on the far side from the first terminal 13 of the protrusion 25 (see FIG. 3). The expression "edge of the protrusion" may be paraphrased as "base of the protrusion" or "root of the protrusion".

When the positional relationship between the above two points is satisfied, it is possible to prevent the tip of the second terminal 23 from interfering with the first terminal 13 when the case 11 of the control device 10 is brought closer to the housing 21 of the transaxle 20. A change in the positional relationship between the terminals 13 and 23 when the case 11 is brought closer to the housing 21 will be described with reference to FIGS. 4 to 6.

For convenience of explanation, it is expressed in FIGS. 4 to 6 that the transaxle 20 is brought closer to the control device 10. Since the transaxle 20 and the control device 10 need only be relatively close to each other, in terms of expression, "the control device 10 is brought closer to the transaxle 20" and "the transaxle 20 is brought closer to the control device 10". Is equivalent.

FIG. 4 shows the time when the transaxle 20 is brought closer to the control device 10 and the pair of protrusions 15 and 25 first come into contact with each other. The transaxle 20 is brought closer to the control device 10 so that the positioning pin 4 passes through the fitting hole 5. As described above, the distance L1 from the first terminal 13 to the first protrusion 15 is larger than the distance L2 from the tip of the second terminal 23 to the edge 25a on the first terminal 13 side of the second protrusion 25. The distance from the tip of the second terminal 23 to the edge 25b on the far side from the first terminal 13 of the second protrusion 25 is shorter than the distance L3 (see FIG. 3). Therefore, when the first protrusion 15 and the second protrusion 25 first come into contact with each other, the tip of the second terminal 23 does not reach the first terminal 13, as shown by the arrow line P1 in FIG.

Further, as described above, when the second fastening surface 23a of the second terminal 23 is in contact with the first fastening surface 13a of the first terminal 13 and viewed from the alignment direction, the first protrusion 15 and the second protrusion 25 overlaps in the range dA (see FIG. 4). Therefore, when the transaxle 20 is further brought closer to the control device 10 from the state shown in FIG. 4, the first protrusion 15 and the second protrusion 25 interfere with each other, and the transaxle 20 moves to the left in the figure. As a result, the second terminal 23 moves away from the first terminal 13. The arrow line P2 in FIG. 5 indicates the moving direction of the second terminal 23. FIG. 5 shows a state in which a pair of protrusions 15 and 25 are in contact with each other at their vertices.

When the transaxle 20 approaches the control device 10 from the state of FIG. 5, the protrusions 15 and 25 get over each other (FIG. 6). The transaxle 20 is always moved in the direction in which the positioning pin 4 is inserted into the fitting hole 5. Therefore, when the protrusions 15 and 25 get over each other, the second terminal 23 moves in the direction approaching the first terminal 13, but the second terminal 23 already has the second fastening surface 23a as the first fastening of the first terminal 13. It has advanced to a position facing the surface 13a. Therefore, when the protrusions 15 and 25 get over each other, the second fastening surface 23a of the second terminal 23 comes into contact with the first fastening surface 13a of the first terminal 13. The transaxle 20 is further moved toward the control device 10 and the positioning pin 4 is inserted into the fitting hole 5. When the opening 21a of the housing 21 of the transaxle 20 comes into contact with the opening 11a of the case 11 of the control device 10, the bolt hole 13b (see FIG. 3) of the first terminal 13 becomes the second terminal 23 as described above. Consistent with the bolt hole 23b (see FIG. 3). The bolt 3 is inserted into the bolt hole 13b of the first terminal 13 and the bolt hole 23b of the second terminal 23 through the service hole 12, and the bolt 3 is fastened with a tool (not shown).

As described above, when the above-mentioned conditions (1) and (2) are satisfied, when the transaxle 20 is moved toward the control device 10, the pair of protrusions 15 and 25 interfere with each other, so that the second Immediately before the terminal 23 reaches the first terminal 13, the second terminal 23 is separated from the first terminal 13, and interference between the two is avoided. The motor system 2 of the embodiment can avoid the interference between the first terminal 13 and the second terminal 23 when the transaxle 20 is connected to the control device 10, regardless of the positioning pin 4. As shown in FIG. 6, the positioning pin 4 reaches the fitting hole 5 after the control device 10 and the transaxle 20 approach each other to a position where the first terminal 13 and the second terminal 23 overlap each other when viewed from the Y direction. Has only the length to do.

The points to be noted regarding the techniques described in the examples will be described. A first terminal whose fastening surface faces in a direction orthogonal to the alignment direction of the transaxle 20 and the control device 10 may be provided on the transaxle 20. Similarly, the second terminal extending toward the first terminal and having the second fastening surface facing the first fastening surface may be provided in the control device 10.

The control device 10 of the embodiment is an example of the first device, and the transaxle 20 is an example of the second device. The business equipment may be referred to as a second device, and the transaxle 20 may be referred to as a first device. The technique disclosed herein may be applied to devices other than the device in which the control device 10 and the transaxle 20 are combined. For example, the techniques disclosed herein may be applied to one device in which the housing is divided into two parts. In that case, one of the divided cases corresponds to the first device, and the other case corresponds to the second device.

Although specific examples of the present invention have been described in detail above, these are merely examples and do not limit the scope of claims. The techniques described in the claims include various modifications and modifications of the specific examples exemplified above. The technical elements described herein or in the drawings exhibit their technical usefulness alone or in various combinations, and are not limited to the combinations described in the claims at the time of filing. In addition, the techniques exemplified in the present specification or the drawings can achieve a plurality of purposes at the same time, and achieving one of the purposes itself has technical usefulness.

2: Motor system 3: Bolt 4: Positioning pin 5: Fitting hole 10: Control device 11: Case 11a, 21a: Opening 12: Service hole 13: First terminal 14: Terminal support base 15, 25: Projection 20: Transformer Axle 21: Housing 23: Second terminal 24: Terminal support

Claims (1)

A uniting device in which a first device having a first opening and a second device having a second opening are connected to the first opening with the second opening facing each other.
A first terminal provided in the first device and having a first fastening surface facing a direction intersecting the arrangement direction of the first device and the second device.
A second terminal provided in the second device, extending toward the first terminal, and having a second fastening surface facing the first fastening surface.
It is provided in each of the first device and the second device so as to face each other when the tip of the second terminal reaches the first terminal when the second device is connected to the first device. With a pair of protrusions that are arranged,
Equipped with
The pair of protrusions are arranged so that the opposing tips of the pair of protrusions overlap each other when viewed from the alignment direction with the first fastening surface in contact with the second fastening surface.
The distance from the first terminal to the protrusion on the first device side is longer than the distance from the tip of the second terminal to the edge of the protrusion on the second device side on the first terminal side, and the second. A coalescing device that is shorter than the distance from the tip of the terminal to the edge of the protrusion on the second device side far from the first terminal.

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