JP2012160355A - Shield shell of terminal board - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce noise radiated from a shield shell covering a terminal board hooking up electrical wiring of a rotary electric machine by a surface of a case housing the rotary electric machine.SOLUTION: A terminal board 10 has an electric power connector 22 for hooking up an electric power line. A shell part 42 of a shield shell 16 has a ceiling surface 46 covering an upper side of the electric power connector 22. A cap 66 is integrally formed on the inner side of the ceiling surface 46. When the shield shell 16 is attached, the cap 66 is fitted into an upper opening 36 of an electric power connector housing 28 to seal the opening. The cap 66 suppresses vibrations of the ceiling surface 46.

Description

  The present invention relates to a shield shell that covers at least a part of a terminal block for relaying an electric wiring inside and outside a case that houses a rotating electrical machine.

  The electric motor may be housed in a sealed case. For example, in an automobile such as an electric vehicle or a hybrid vehicle that uses an electric motor as a power source, the electric motor may be accommodated in a case of a transmission or a transaxle. A transaxle is a device in which a transmission, a differential, and a final reduction gear are integrated. As is well known, in an electric vehicle such as an electric vehicle, the motor is caused to function as a generator during braking. Hereinafter, such an electric machine functioning as an electric motor and a generator will be described as a rotating electric machine.

  When the rotating electrical machine is housed in the case, it is necessary to relay a power line that sends power to the motor inside and outside the case. In addition, when information such as the state of the motor, for example, the rotation angle is sent to the outside, it is necessary to relay the signal of the sensor arranged in the case inside and outside the case. For this purpose, Patent Document 1 below discloses an example in which an opening is provided in a case, a terminal block is attached to the opening, and electrical wiring inside and outside the case is connected via the terminal block. In this document, a shield shell that covers the terminal block is provided in order to shield the electromagnetic wave of the terminal block.

JP 2008-301544 A

  The shield shell is made of a conductor, particularly a metal plate or a steel plate, in order to shield electromagnetic waves. Sound in a case such as a transaxle is transmitted through the shield shell or vibrated by the shield shell, and is emitted to the outside to become noise. Further, the vibration of the case may be transmitted to the shield shell, and the shell may vibrate to emit sound.

  An object of this invention is to reduce the sound which permeate | transmits or shields a shield shell.

  The shield shell according to the present invention includes a shell portion made of a metal plate that has a ceiling surface that covers at least a part of the terminal block and particularly covers the upper portion of the terminal block. A resin contact portion is integrally provided on the ceiling surface of the shell portion, and this contact portion contacts a part of the terminal block to suppress vibration of the ceiling surface.

  The terminal block may include a power connector housing that accommodates a relay terminal of the power line, and a ceiling surface of the shield shell covers the power connector housing. Further, the power connector housing can have an opening opened upward, and the contact portion provided on the ceiling surface can function as a cap for sealing the opening of the power connector housing.

  By providing the resin contact portion integrally with the ceiling surface of the metal plate shell portion of the shield shell, vibration of the ceiling surface is suppressed. Further, the vibration of the ceiling surface is also suppressed by the contact portion contacting the terminal block.

It is a perspective view which shows the state with which the case of the terminal block for rotary electric machines was mounted | worn. It is a perspective view which shows the terminal block for rotary electric machines independently. It is a perspective view shown in the state where a part of terminal block for rotating electrical machines was seen through. It is sectional drawing of the terminal block for rotary electric machines. It is a disassembled perspective view of the terminal block for rotary electric machines, and a shield shell. It is a partially broken perspective view of a terminal block for a rotating electrical machine and a shield shell. It is sectional drawing of the terminal block for rotary electric machines, and a shield shell. It is a figure which shows the attachment process of a shield shell. It is a figure which shows the attachment process of a shield shell.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a diagram showing a state in which a rotating electrical terminal block (hereinafter simply referred to as a terminal block) 10 is mounted on a case 12 that houses a rotating electrical machine such as a transaxle case. FIG. 2 is a diagram showing the terminal block 10 alone, and FIG. 3 is a diagram showing a state in which a part of the terminal block 10 is seen through. FIG. 4 is a view showing a cross section of the terminal block 10 at the position indicated by the line AA in FIG. In the following description, the direction away from the surface of the case 12 will be described as upward, and the direction orthogonal to the upper side will be described as side.

  The terminal block 10 is mounted on the case 12 so as to close the opening 14 (see FIG. 4) of the case 12, and further, as shown in FIG. 16 is covered. The terminal block 10 has a cover plate 18 made of a metal plate, preferably a steel plate, and this cover plate is fixed to the peripheral portion of the case opening 14 with bolts 20, whereby the entire terminal block 10 is mounted on the case 12. The The terminal block 10 further supplies power to the rotating electrical machine and relays a power line for sending power from the rotating electrical machine, the angular position of the rotor of the rotating electrical machine, the main part of the rotating electrical machine, or the transaxle. A signal connector 24 is provided for relaying a signal line through which a signal related to the internal temperature is transmitted. The power and signal connectors 22, 24 are arranged so as to penetrate the case 12, in other words, extend so as to intersect the cover plate 18 fixed to the case opening 14.

  The power connector 22 includes a power line relay terminal 26 and a power connector housing 28 that houses the power line relay terminal 26. The power line relay terminal 26 is an elongated metal plate, preferably a copper plate, and nuts 30 and 32 are fixed to both ends thereof by welding. The power line relay terminal 26 is provided with holes corresponding to the nuts 30 and 32. A power line from the rotating electrical machine is coupled to the end portion of the power line relay terminal 26 inside the case 12 by screwing a bolt to the nut 32. The power line 40 that has entered from the side opening 34 facing the side of the power connector housing 28 is coupled to the outer end portion using bolts. When tightening the bolt, a bolt and a tool for tightening the bolt are inserted from the upper opening 36 facing upward of the power connector housing 28. Similarly to the power connector 22, the signal connector 24 also includes a metal terminal (not shown) for coupling signal wiring inside and outside the case, and a signal connector housing 38 that accommodates the terminal.

  The power and signal connector housings 28 and 38 are made of resin, and are formed by insert molding in which the cover plate 18 is placed in a mold and the resin is injected into the mold. As a result, the cover plate 18 and the power and signal connector housings 28 and 38 are integrally formed. In addition to the cover plate 18, the power line relay terminal 26 can also be integrally formed as an insert part. Furthermore, a terminal for signal wiring can also be used as an insert part.

  FIG. 5 is an exploded perspective view of the terminal block 10 and the shield shell 16. The shield shell 16 includes a box-shaped shell portion 42 that surrounds four surfaces excluding the surface that receives the power line 40 of the power connector 22, and a lid portion 44 that covers the open surface of the shell portion 42. The shell portion 42 includes a ceiling surface 46 that covers the upper side of the power connector 22, a first side wall surface 48 positioned between the power connector 22 and the signal connector 24, a second side wall surface 50 that faces each other, and a third side wall surface 50. It has a side wall surface 52 (see FIG. 7). On the lower sides of the second and third side wall surfaces 50 and 52, a flange 54 having a through hole for passing the bolt 20 at the tip is provided. The shell portion 42 has a general shape having two flanges (one of the side surfaces and the lower surface) open and a flange extending so as to extend the lower surface to two opposite sides of the lower surface.

  The lid portion 44 includes a plate-like plate portion 60 having a through-hole 58 (see FIGS. 8 and 9) through which the power line holder 56 that holds the power line 40 passes, and a cylinder portion 62 provided along the edge of the through-hole 58. Have The cross-sectional shape of the cylindrical portion 62 is a shape that follows the outer shape of the power line holder 56, and in this embodiment is an oval cross-section. The power line holder 56 is held on the inner peripheral surface of the cylindrical portion 62. A flange 64 having a through hole through which the bolt 20 is passed is provided on the lower side of the plate portion 60.

  Inside the ceiling surface 46 of the shell portion 42, a cap 66 that seals the upper opening 36 of the power connector housing 28 is provided integrally with the ceiling surface 46. The cap 66 can be made of resin and can be formed integrally with the shell portion 42 by insert molding.

  5 and 6 are diagrams for clearly showing the shape of the cap 66. The cap 66 has a boss 68 that engages with a hole opened in the ceiling surface 46, and the boss 68 prevents the drop off. The upper surface of the cap 66 is in close contact with the ceiling surface 46. The cap 66 has an entry portion 70 that extends into and enters the upper opening 36, and an end surface portion 74 that includes a flange 72 that contacts the edge of the upper opening 36. The shape when the entry portion 70 is viewed from above is a shape that fits into the shape of the upper opening 36 of the power connector housing 28, and is an oval shape in this embodiment. A groove is provided in the circumferential direction on the outer peripheral surface of the entry portion 70, and an O-ring 76 is disposed in the groove.

  By providing the resin cap 66 integrally with the ceiling surface 46, the vibration of the ceiling surface 46 is suppressed, and the emission of sound from the shield shell 16 is suppressed. The vibration of the ceiling surface 46 is also suppressed by the cap 66 coming into contact with the power connector housing 38.

  8 and 9 are explanatory diagrams of the process of attaching the shield shell 16. First, as shown in FIG. 8, the power line 40 is passed through the through hole 58 of the lid portion, and then the power line holder 56 is inserted into the side opening 34 (see FIG. 4) of the power connector housing 28. A bolt is passed through the fitting terminal 76 (see FIG. 5) of the power line 40, and the bolt is screwed to the nut 32. At this time, a bolt is inserted from the upper opening 36, and a tool such as a wrench for tightening the bolt is inserted. Next, as shown in FIG. 9, the shell portion 42 of the shield shell 16 is put on the power connector 22. At this time, the cap 66 is fitted into the upper opening 36 of the power connector housing 28. Then, the lid portion 44 of the shield shell 16 is moved along the power line 40 to cover the open portion of the shell portion 42. As a result, it becomes as shown in FIG.

  In the above embodiment, the shell portion 42 of the shield shell 16 has the three side wall surfaces 48, 50, and 52, but may have a shape without one side wall surface, for example, the first side wall surface 48. . In this case, the shell portion of the shield shell has a U-shape that is open downward. It is preferable to provide a fixing flange at the tip of the U-shape. It is also possible to form a shield shell in which the lid portion is integrated with the shell portion while the signal connector 24 side is open (that is, there is no first side wall surface 48). The general shape of the shield shell is not limited to a rectangular parallelepiped, but may be other shapes.

A preferred embodiment is described below.
A shield shell that covers at least a part of a terminal block having a power connector housing that houses a power line relay terminal that relays an internal and external power line inside a case that houses a rotating electrical machine,
A shell portion made of a metal plate having a ceiling surface covering the upper side of the power connector housing;
A resin cap portion that is integrally provided on the ceiling surface of the shell portion and seals the opening opened above the power connector housing;
With shield shell.

  10 terminal block, 12 case, 16 shield shell, 22 power connector, 24 signal connector, 28 power connector housing, 36 upper opening, 40 power line 42 shell portion, 44 lid portion, 46 ceiling surface, 48 first side wall surface , 50 Second side wall surface, 52 Third side wall surface, 56 Power line holder, 58 Through-hole, 60 Plate portion, 62 Tube portion, 66 Cap.

Claims (2)

A shield shell that covers at least a portion of the terminal block for relaying the electrical wiring inside and outside the case housing the rotating electrical machine,
A shell portion made of a metal plate having a ceiling surface covering the upper side of the terminal block;
A resin-made abutting portion that is integrally provided on the ceiling surface of the shell portion and abuts on a part of the terminal block;
With shield shell. The shield shell according to claim 1,
The shield shell covers the power connector housing that houses the power line relay terminal that relays the power line of the terminal block with the ceiling surface,
The contact portion functions as a cap that seals an opening opened above the power connector housing.
Shield shell.

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