JP6319123B2 - Wiring lead-in structure - Google Patents

Description

  The present invention relates to a wiring lead-in structure that can reduce the number of parts of a wiring lead-in structure that draws wiring in a non-waterproof space into a waterproof space via a partition wall substrate, and can easily perform the wiring lead-in operation.

  Conventionally, when a wiring is drawn from a non-waterproof space to a waterproof space, a grommet is arranged and connected to a partition board that separates the non-waterproof space and the waterproof space. Here, the inlet of the grommet is designed to be small with respect to the wiring diameter because water enters when there is a gap. Here, since the tip end of the wiring has a terminal member that is tip-treated with a crimp terminal or the like, it is not easy to penetrate the wiring into the grommet drawing port when the device including the wiring is assembled.

  In Patent Document 1, a waterproof space surrounded by a waterproof casing and having a power module and the like and a non-waterproof section that is a wind tunnel portion that performs cooling using a heat sink or the like are connected via a casing base. A power conversion device is described that draws wiring from a non-waterproof space to a waterproof space via a grommet on the body base. In this power conversion device, the wiring pull-in operation via the grommet is performed by providing a grommet support member that supports the grommet separately from the housing base and wiring the grommet pull-in port supported by the grommet support member. In addition, this wired grommet support member is attached to the housing base. In addition, the work space during wiring work is widened so that wiring workability is enhanced.

JP 2012-228018 A

  However, in the above-described Patent Document 1, although high wiring workability can be secured, it is necessary to newly provide a grommet support member. Therefore, the number of assembling steps cannot be reduced, and the grommet is supported by the grommet support member. Since it is necessary to perform wiring in the grommet drawing port in a state where the wiring is performed, the degree of freedom in work during wiring work is low, and further improvement in wiring workability is desired.

  The present invention has been made in view of the above, and it is possible to reduce the number of parts of the wiring lead-in structure that draws the wiring in the non-waterproof space into the waterproof space via the partition board, and to easily perform the wiring pull-in operation. An object of the present invention is to provide a wiring lead-in structure that can be used.

  In order to solve the above-described problems and achieve the object, the wiring lead-in structure according to the present invention is a wiring lead-in structure that draws wiring in a non-waterproof space into a waterproof space via a partition substrate, An opening and a notch into which the wiring is drawn into the opening are formed, and the grommet into which the wiring is inserted is fitted into the notch, and is provided on the non-waterproof space side of the partition board. The pressing member closes the opening and presses the grommet.

  The wiring lead-in structure according to the present invention is characterized in that, in the above invention, the grommet is divided in a direction perpendicular to a pressing direction by the pressing member, and the wiring is sandwiched between the divided surfaces. To do.

  The wiring lead-in structure according to the present invention is characterized in that, in the above invention, a marker indicating a position to be sandwiched between the grommets is displayed on the wiring.

  In the wiring lead-in structure according to the present invention, in the above invention, a heat sink that cools the heat generating portion arranged in the waterproof space is arranged in the non-waterproof space in the opening, and the heat sink It functions as a member.

  The wiring lead-in structure according to the present invention is characterized in that, in the above invention, a plurality of the notches are provided, and the notches are arranged in a straight line.

  According to the present invention, when the wiring in the non-waterproof space is drawn into the waterproof space through the partition wall substrate, an opening is formed in the surface of the partition wall substrate and the notch for drawing the wiring into the opening is formed. In a state where the grommet into which the wiring is inserted is fitted in the notch, a pressing member provided on the non-waterproof space side of the partition wall substrate closes the opening and presses the grommet. Thereby, the number of parts of the wiring lead-in structure can be reduced, and the wiring pull-in operation can be easily performed.

FIG. 1 is a cross-sectional view showing a schematic configuration of a power conversion device having a wiring lead-in structure according to an embodiment of the present invention. 2 is a cross-sectional view taken along line AA of the power conversion device illustrated in FIG. 1. FIG. 3 is a perspective view showing the configuration of the grommet shown in FIG. FIG. 4 is an explanatory diagram for explaining an assembly work procedure of the wiring lead-in structure. FIG. 5 is an explanatory diagram for explaining an assembly work procedure of the wiring lead-in structure when the grommet has a divided configuration.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments for carrying out the present invention will be described with reference to the accompanying drawings.

(Configuration overview)
FIG. 1 is a cross-sectional view showing a schematic configuration of a power conversion device 1 having a wiring lead-in structure according to an embodiment of the present invention. 2 is a cross-sectional view taken along line AA of the power conversion device 1 shown in FIG. FIG. 3 is a perspective view showing the configuration of the grommet 8 shown in FIG. As shown in FIG. 1, in the power conversion device 1, a non-waterproof space E <b> 1 that functions as a wind tunnel portion and a waterproof space E <b> 2 are connected via a partition wall substrate 2. The non-waterproof space E1 is covered with the partition wall substrate 2 and the non-waterproof space housing 3, and the waterproof space E2 is covered with the partition wall substrate 2 and the waterproof space housing 4.

  In the waterproof space E2, a diode module 11 that performs rectification, a power module 12 that includes a switching element such as an IGBT that converts direct current into alternating current, a power supply board, a control board, and a terminal block (not shown) are arranged. The non-waterproof space E <b> 1 includes a DC reactor 10 and a heat sink 9 on which the diode module 11 and the power module 12 are mounted. The heat sink 9 cools the diode module 11 and the power module 12 as heat generating parts. Cooling fins are formed on the non-waterproof space E1 side of the heat sink 9, and the diode module 11 and the power module 12 are mounted on the waterproof space E1 side. In addition, the capacitor | condenser which is not illustrated penetrates the partition board | substrate 2, and an electrode terminal is arrange | positioned in the waterproof space E2. Further, a cooling fan (not shown) is provided in the non-waterproof space E1. The wiring 7 is drawn into the waterproof space E2 through the grommet 8 from the DC reactor 10 in the non-waterproof space E1. The crimp terminal 7 a arranged at the tip of the wiring 7 is connected to the diode module 11.

  As shown in FIGS. 1 and 2, the partition wall substrate 2 has an opening 5 in which the heat sink 9 is disposed from the non-waterproof space E1 side. The opening 5 is formed with a notch 6 for fitting the grommet 8 into the partition wall substrate 2 from the opening 5 side.

  As shown in FIG. 3, the grommet 8 is a plate-like member having a semi-cylindrical side surface at the front end surface and a rear end surface being rectangular, and a fitting groove 8 b is formed on the side surface. In addition, a lead-in port 8a through which the wiring 7 is drawn is formed at the center position of the semi-cylinder. The hole diameter of the lead-in port 8 a is designed to be smaller than the wiring diameter of the wiring 7. The grommet 8 in a state in which the wiring 7 is drawn into the drawing port 8 a is in a state of being fitted into the notch 6. The heat sink 9 is attached to the back surface side (non-waterproof space side) of the partition board 2 by closing the opening 5 and pressing the grommet 8 from the rear end surface side with the diode module 11 and the power module 12 mounted. It is done.

(Wiring assembly procedure)
As shown in FIG. 4, first, the grommet 8 in a state where the wiring 7 is drawn into the drawing port 8a is fitted into the end portion of the notch 6 by fitting the fitting groove 8a and is fitted by sliding. The wiring 7 is pulled in by using the marker 7b indicating the pull-in position shown in FIG. 1 which is set in advance as an index, so that the position of the marker 7b is in the vicinity of the grommet 8 or the position of the grommet 8. Made by. The operation of drawing the wiring 7 into the drawing port 8 a can be performed individually for each grommet 8.

  Thereafter, in order to enhance the waterproof function of the waterproof space E2, the opening 5 is closed with the heat sink 9 and pressed from the rear end surface side of the grommet 8 with the heat sink 9, and then the heat sink 9 is attached to the back surface side of the partition board 2. Here, in FIG. 4, a plurality of notches 6 and a plurality of grommets 8 are arranged in a straight line, and the grommets 8 can be pressed at a time by the heat sink 9.

  In the embodiment described above, the wiring 7 is drawn into each grommet 8 based on the marker 7b set in advance on the wiring 7, and the plurality of drawn wirings 7 are fitted into the notches 6, Since only the heat sink 9 needs to be pressed, the number of parts of the wiring lead-in structure can be reduced and the wiring pull-in operation can be easily performed.

(Modification)
In the above-described embodiment, when there is a terminal member that has been subjected to tip processing such as the crimp terminal 7a at the tip of the wiring 7, passing the crimp terminal 7a or the like through the lead-in port 8a takes time and labor. It may be damaged. For this reason, in the modification of the embodiment, the grommet 8 is divided into two divided grommets 81 and 82 in a direction perpendicular to the pressing direction by the heat sink 9 and passing through the center of the drawing port 8a. As a result of this division, the space of the inlet 8a is also divided. The front-side divided grommet 81 is formed with a notch 81a for drawing-in opening, and the divided grommet 82 at the rear-end side is formed with a notch 82b for drawing-in opening.

  In the wiring drawing work according to this modification, as shown in FIG. 5, first, the fitting groove 8 b of the divided grommet 81 is fitted into the end of the notch 6 and pushed. Thereafter, the wiring 7 is applied to the drawing opening forming notch 81 a of the divided grommet 81 with reference to the marker 7 b of the wiring 7. Thereafter, the divided grommet 82 is fitted into the notch 6, and the drawing-in hole forming notch 82 a is brought into contact with the wiring 7.

  Thereafter, in order to enhance the waterproof function of the waterproof space E2, the opening 5 is closed with the heat sink 9, and the divided grommet 81, the wiring 7, and the divided grommet 82 are pressed from the rear end face side of the divided grommet 82 with the heat sink 9. A heat sink 9 is attached to the back side of the partition wall substrate 2. Note that only the divided grommet 81 may be pushed into the notch 6 from the beginning.

  In this modification, when the divided grommets 81 and 82 are fitted into the notches 6, the wiring 7 is simultaneously pulled in, and the crimping terminal 7a at the tip of the wiring 7 is not passed through the pulling port 8a, and Since the wiring 7 does not need to be drawn in, the wiring drawing work is further facilitated. Further, since the rubber bushes of the divided grommets 81 and 82 are not damaged at the time of drawing the wiring, it is possible to prevent the waterproof function from being deteriorated.

  In the embodiment described above, the rear end face of the grommet 8 is pressed using the end face of the heat sink 9. However, the present invention is not limited to this, and the rear end face of the grommet 8 is pressed instead of the heat sink 9. You may provide the press member which can do.

  The shapes of the grommet 8 and the notch 6 are not limited to those described above, and may be any shape as long as the wiring is drawn in and pressed by the pressing member to ensure waterproofness.

DESCRIPTION OF SYMBOLS 1 Power exchange apparatus 2 Bulkhead board | substrate 3 Non-waterproof space housing | casing 4 Waterproof space housing | casing 5 Opening part 6 Notch 7 Wiring 7a Crimp terminal 7b Marker 8 Grommet 8a Inlet 8b Fitting groove 9 Heat sink 10 DC reactor 11 Diode module 12 Power Module 81, 82 Divided grommet 81a, 82a Notch for drawing-in opening E1 Non-waterproof space E2 Waterproof space

Claims (4)

A wiring lead-in structure for drawing the wiring in the non-waterproof space into the waterproof space through the partition board,
Forming an opening in the surface of the partition substrate and a notch for drawing the wiring into the opening;
In a state where the grommet with the wiring inserted is fitted into the notch, a pressing member provided on the non-waterproof space side of the partition wall board closes the opening and presses the grommet ,
A wiring lead-in structure , wherein a heat sink that cools a heat generating portion disposed in the waterproof space is disposed in the non-waterproof space in the opening, and the heat sink functions as the pressing member .   The wiring drawing structure according to claim 1, wherein the grommet is divided in a direction perpendicular to a pressing direction by the pressing member, and the wiring is sandwiched between the divided surfaces.   The wiring lead-in structure according to claim 1, wherein a marker indicating a position sandwiched between the grommets is displayed on the wiring. The notch is provided in plurality, the wiring lead-in structure according to any one of claims 1 to 3 in which each notch and being arranged in a straight line.

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