JP5424053B2 - Cover for inverter storage case - Google Patents

Description

  The present invention relates to an inverter storage case cover that covers an opening of a case for storing an inverter that performs power conversion in a sealed state.

  Conventionally, as shown in FIG. 1, a case 10 for housing an inverter (not shown) has three-phase cables U, V, and W, plus a positive cable P and a negative cable N of a DC power source. A high-voltage terminal block 11 is connected to the inside. The high-voltage terminal block 11 is formed with a plurality of through holes 13 for fixing the cables U, V, W, P, and N with bolts, and the through holes 13 are opened in the case 10. To be exposed through. Further, there is a cover assembly portion 16 having a screw hole 16 a around the opening 12.

  As shown in FIG. 2, which is a sectional view taken along the line A1-A2 of FIG. 1, for example, a W-phase cable is led to the high-voltage terminal block 11, and a W-phase bus bar WB connected to the inverter by bolts 15a and nuts 15b. And fixed to the high-voltage terminal block 11. After fixing all the cables U, V, W, P, and N in this way, the cover 12 for the inverter storage case shown in FIG. Then, the case 10 is brought into an airtight state.

  As shown in the plan view seen from the back side (inner side when the case 10 is covered) in FIG. 3, the inverter storage case cover 17 is generally elliptical as a whole and has two parallel sides in the longitudinal direction toward the drawing. A total of four screw hole forming portions 17a, two in two vertically symmetrically, project horizontally. Furthermore, a side wall 17b that protrudes perpendicularly to the horizontal surface of the back surface is formed on the circumferential side of the overall shape. Each screw hole forming portion 17a is formed with a through screw hole 17c. On the inner peripheral side of the screw hole forming portion 17a, there is provided a packing groove 17d that is slightly spaced from the screw hole 17c and goes around the entire back surface.

  FIG. 4 shows the shape when the inverter storage case cover 17 is cut in the C1-C2 line shown in FIG. However, FIG. 4 shows a state in which the case 10 covered with the inverter storage case cover 17 shown in FIG.

  As shown by an arrow C3 in FIG. 4, the C1-C2 cross section is fixed to the case 10 by screwing a screw 18 into the screw hole 17c of the screw hole forming portion 17a. Thus, the packing 19 fitted in the packing groove 17d is in close contact with the end surface of the upstanding side wall 10a of the opening 12 of the case 10 in a pressed state. However, the packing 19 is an elastic member such as rubber. Thus, the inverter storage case cover 17 is fixed in close contact with the case 10. There exists a thing of patent document 1 as this type of prior art.

JP 2009-257459 A

  However, in the case where the inverter storage case cover 17 is mounted on the vehicle, the inverter storage case cover 17 is mounted on the vehicle as shown in FIG. However, the case 10 may be mounted upside down depending on the vehicle. In this case, the inverter storage case cover 17 is turned upside down as shown in FIG. For this reason, as shown in FIG. 4, the screw hole forming portion 17 a is in a tray state where the upper portion is open, and water may accumulate in this portion as indicated by reference numeral 20. When the water 20 accumulates in the screw hole forming portion 17a in this manner, the water 20 accumulates in the recess between the packing groove 17d and the side wall 17b as indicated by reference numeral 20. In this way, when the water 20 is accumulated, the packing 19 is damaged or deformed for some reason and a gap is formed between the case 10 and the water 20 enters the case 10 to cause a problem with the inverter. There is a problem that arises. The same problem occurs when liquid other than water 20 accumulates.

  The present invention has been made in view of such circumstances, and when an inverter storage case is mounted upside down on a vehicle or the like, a liquid such as water is applied to the cover portion of the case opening that is placed below the case. It aims at providing the cover for inverter storage cases which can prevent storing.

  In order to achieve the above object, the invention according to claim 1 has a shape in which an opening of a case for accommodating the inverter is sealed in a sealed state with a packing interposed between the end of the opening. There is a screw hole forming part having a flat screw hole forming surface in which a screw hole for screwing to the case for pressing the packing against the end of the opening is formed as this shape, and the screw hole An inverter storage case cover comprising a side wall standing upright around a horizontal surface of the entire cover including the forming portion, wherein the screw hole forming portion has a back surface on the case contact side of the screw hole forming surface facing upward A step surface which is a horizontal surface which is lowered by a predetermined height with respect to the back surface when directed, and a drain opening which penetrates at least the step surface.

  According to this configuration, a case whose cover is covered with an inverter storage case cover (cover) is mounted upside down on a mounted device such as a vehicle, so that the back surface of the cover faces upward, and the screw of the cover Even when the hole forming portion is in a tray state and the liquid enters the screw hole forming surface, this water is guided to the drain hole on the step surface one step down from the screw hole forming surface and flows down to the outside of the case. Therefore, it is possible to prevent water from accumulating in the screw hole forming portion as in the prior art. As a result, even if the packing is damaged or deformed for some reason, and there is a gap between the packing and the case, there is no stored water as in the conventional case, so water may enter the case from the gap. For this reason, it is possible to prevent a problem from occurring in the inverter due to water intrusion.

  The invention according to claim 2 is characterized in that the drain opening is a through-hole penetrating the step surface.

  According to this configuration, since the drain opening is a through hole penetrating the step surface, the hole can be easily formed. Therefore, the manufacturing cost can be reduced.

  The invention according to claim 3 is characterized in that the drain opening is a slit part from which a part of the side wall of the step surface is removed.

  According to this configuration, since the drain opening is a slit portion from which a part of the side wall of the step surface is removed, the drain opening can be easily formed. Therefore, the manufacturing cost can be reduced.

According to a fourth aspect of the present invention , there is a shape in which a packing is interposed between an opening portion of a case for housing the inverter and an end portion of the opening portion so as to be sealed. In the inverter storage case cover, comprising: a screw hole forming portion having a flat screw hole forming surface in which a screw hole for screwing the case to be pressed against the end of the opening is formed. The horizontal surface of the entire cover including the portion has a shape that ends at the end of the surface, and the screw hole forming portion is formed when the back surface that is the case contact side of the screw hole forming surface is directed upward. On the other hand, a step surface which is a horizontal surface lowered by a predetermined height is provided, and at least a drain opening that penetrates the step surface is provided .

According to this configuration, a case whose cover is covered with an inverter storage case cover (cover) is mounted upside down on a mounted device such as a vehicle, so that the back surface of the cover faces upward and the liquid covers Even when entering the screw hole forming surface, the water is guided to the drain hole on the step surface one step down from the screw hole forming surface and flows down to the outside of the case. Further, side wall portions of the screw hole forming surface when brought into close contact with the cover to the case rather free, since the horizontal-shaped surface of the entire cover with a screw hole formed portion has a shape that terminates at the plane end, does not accumulate water can not accept dish between the case. Therefore, it is possible to prevent water from accumulating in the screw hole forming portion as in the prior art. As a result, even if the packing is damaged or deformed for some reason, and there is a gap between the packing and the case, there is no stored water as in the conventional case, so water may enter the case from the gap. For this reason, it is possible to prevent a problem from occurring in the inverter due to water intrusion.

It is a top view which shows the external appearance of an inverter storage case. It is A1-A2 sectional drawing shown in FIG. It is the top view seen from the back side of the conventional inverter storage case cover. It is sectional drawing at the time of cut | disconnecting by the C1-C2 line | wire shown in FIG. It is a perspective view which shows the structure of the cover for inverter storage cases which concerns on embodiment of this invention. (A) is a plan view of the back side of the inverter storage case cover of the present embodiment, (b) is a front view, (c) is a right side view, and (d) is a D1-D2 sectional view shown in (a). is there. It is sectional drawing at the time of cut | disconnecting by the D1-D2 line | wire shown in FIG. (A) is a top view which shows the structure of the cover for inverter storage cases which concerns on the application example 1 of embodiment of this invention, (b) is a front view. It is a top view which shows the structure of the cover for inverter storage cases which concerns on the application example 2 of embodiment of this invention. It is sectional drawing at the time of cut | disconnecting by the F1-F2 line shown in FIG.

  Embodiments of the present invention will be described below with reference to the drawings. However, parts corresponding to each other in all the drawings in this specification are denoted by the same reference numerals, and description of the overlapping parts will be omitted as appropriate.

  5 is a perspective view showing the configuration of the inverter storage case cover according to the embodiment of the present invention, FIG. 6A is a plan view of the back side of the inverter storage case cover, FIG. 5B is a front view, and FIG. ) Is a right side view, and (d) is a D1-D2 cross-sectional view shown in (a).

  The inverter storage case cover 30 (hereinafter also abbreviated as cover 30) shown in FIGS. 5 and 6 is a case in which the opening 12 of the inverter storage case 10 shown in FIGS. The inside of 10 is made airtight. The cover 30 has an overall elliptical shape as a whole, and the first screw hole forming portion 30a and the second screw hole forming portion are arranged at positions opposite to each other as shown in FIG. 30b is formed, and the first screw hole forming portion 30a and the second screw hole forming portion 30b are formed on the same side.

  Further, the cover 30 is formed with a side wall 30b that protrudes perpendicularly to the horizontal surface on the back side on the circumferential side of the overall shape. The first and second screw hole forming portions 30a and 30b are formed with through screw holes 30c. On the inner peripheral side of these screw hole forming portions 30a and 30b, a packing groove 30d is provided that is slightly separated from the screw hole 30c and goes around the entire back surface.

  A feature of the present embodiment is a horizontal surface that is lowered by one step by a predetermined height h1 with respect to the screw hole forming surface 30e that is a horizontal surface on which the screw hole 30c of the first screw hole forming portion 30a is formed. A certain level difference surface 30f is formed, and a drain hole 30g penetrating the level difference surface 30f is formed. The other hole 30h formed in the vicinity of the drain hole 30g of the stepped surface 30f is a positioning hole 30h when the cover 30 is attached to the case 10, and the positioning hole 30h is connected to the opening 12 of the case 10. Positioning is performed by fitting a convex portion of a vertical bar (not shown) provided.

  When the cover 30 having such a configuration is closely fixed to the opening 12 of the case 10 and the case 10 is mounted upside down (inverted up and down 180 degrees) on the vehicle, the D1-D2 line shown in FIG. The shape at the time of cutting in the state is as shown in FIG. That is, when the screw 18 is screwed into the screw hole 30c of the screw hole forming portion 30a and fixed to the case 10, the packing 19 fitted in the packing groove 30d on the surface of the opening 12 of the case 10 is pressed. In close contact.

  At this time, a gap is generated between the side wall 30b of the screw hole forming portion 30a and the case 10 as indicated by an arrow Y1. When water enters from this gap, the water flows from the screw hole forming surface 30e to the stepped surface 30f that is lowered by one step, and further flows down from the drainage hole 30g to the outside of the case 10 as indicated by an arrow Y2.

  As described above, according to the inverter storage case cover 30 of the present embodiment, the back surface of the cover 30 faces upward by mounting the case 10 with the opening 30 covered with the cover 30 in an upside-down state on the vehicle. Even when the screw hole forming portion 30a of the cover 30 is in a tray state and water (or some liquid) enters the screw hole forming surface 30e, the water is lowered by one step from the screw hole forming surface 30e. It can be guided to the drain hole 30g of 30f and flow down to the outside of the case 10. Therefore, it is possible to prevent water from accumulating in the screw hole forming portion 30a as in the prior art. As a result, even if the packing 19 is damaged or deformed for some reason, and there is a gap between the packing 19 and the case 10, there is no stored water as in the conventional case, so water enters the case from the gap. For this reason, it is possible to prevent a problem from occurring in the inverter due to water intrusion.

  Further, since the drain hole 30g is a through hole, it can be easily formed, thereby reducing the manufacturing cost.

  Further, as an application example 1 of the present embodiment, as shown in FIGS. 8A and 8B, the stepped surface 30f of the first screw hole forming portion 30a is not provided with the drain hole 30g, but instead of the stepped portion. You may form the slit part which removed a part of side wall 30b of the surface 30f so that it may show with the code | symbol 30i. In addition, the slit portion 30i may be formed anywhere as shown in the drawing as long as the side wall 30b is a portion where the packing groove 30d is not damaged. Thus, even if the slit part 30i is formed in the side wall 30b, the water which entered from the clearance gap between the side wall 30b of the screw hole formation part 30a and the case 10 can be guide | induced outside from the slit part 30i. Accordingly, it is possible to obtain the same operational effects as those of the above embodiment. Further, since the slit portion 30i is formed by removing at least a part of the side wall 30b of the step surface 30f, the slit portion 30i can be easily formed. Therefore, the manufacturing cost can be reduced.

  Further, as a superordinate concept including both the drain hole 30g formed in the present embodiment and the slit portion 30i formed in the application example, it is referred to as a drain opening that penetrates the bottom or the side wall 30b of the cover 30.

Furthermore, as an application example 2 of the present embodiment, an inverter storage case cover 30-2 shown in FIG. 9 may be used. The cover 30-2 includes only four threaded holes forming portions 30j is a second screw hole forming portion 30b, by no Succoth sidewall 30b from the periphery of the whole of the elliptical shape, the cover including a threaded hole formed portion 30j The horizontal surface of the entire 30-2 has a shape that ends at the surface end . The portion other than the surrounding screw hole forming portion 30j without the side wall 30b is a stepped surface 30f. When the cover 30-2 having such a structure is brought into close contact with the case 10, there is no side wall 30b in the portion of the screw hole forming surface 30e as shown in FIG. Water does not accumulate. Accordingly, it is possible to obtain the same operational effects as those of the above embodiment. Moreover, since there is no side wall 30b, it can form easily and it can aim at reduction of manufacturing cost.

DESCRIPTION OF SYMBOLS 10 Inverter storage case 12 Opening part 30 Inverter storage case cover 30a 1st screw hole formation part 30b 2nd screw hole formation part 30c Screw hole 30d Packing groove 30e Screw hole formation surface 30f Step surface 30g Drain hole 30h Positioning hole 30i Slit 30j Screw hole forming part

Claims (4)

In order to press the packing against the end of the opening as a shape, the opening of the case housing the inverter is sealed with a packing interposed between the end of the opening. A screw hole forming portion having a flat screw hole forming surface in which screw holes for screwing to the case are formed, and a side wall standing upright around the horizontal surface of the entire cover including the screw hole forming portion; In the inverter storage case cover comprising:
The screw hole forming portion includes a step surface that is a horizontal surface that is lowered by a predetermined height with respect to the back surface when the back surface that is the case contact side of the screw hole forming surface is directed upward. An inverter storage case cover comprising a drain opening that penetrates at least the step surface.   2. The inverter storage case cover according to claim 1, wherein the drain opening is a through hole penetrating the step surface.   2. The inverter storage case cover according to claim 1, wherein the drain opening is a slit portion from which a part of a side wall of the step surface is removed. In order to press the packing against the end of the opening as a shape, the opening of the case housing the inverter is sealed with a packing interposed between the end of the opening. In a cover for an inverter storage case comprising a screw hole forming portion having a flat screw hole forming surface in which screw holes for screwing to the case are formed,
The horizontal surface of the entire cover including the screw hole forming portion has a shape that ends at the surface end,
The screw hole forming portion includes a step surface that is a horizontal surface that is lowered by a predetermined height with respect to the back surface when the back surface that is the case contact side of the screw hole forming surface is directed upward. An inverter storage case cover comprising a drain opening that penetrates at least the step surface .

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