JP2013004459A - Conductive structure of sealed case - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent twisting of a lead pin projecting from inside of a sealed case to outside of the sealed case.SOLUTION: A metallic substrate 53 is fixed on an outer periphery of a generator housing 37 with screws 32. A filling recess 54 is recessed on an outer surface 531 of the substrate 53, and an insertion hole 532 penetrates through a bottom part 541 of the filling recess 54. One part of a columnar coupling seat part 56 of a bolt 55 is inserted in the filling recess 54, and a coupling hole 562 is recessed on an outer end face 561 of the coupling seat part 56 in the filling recess 54. A lead pin 57 is fitted with and fixed to the coupling hole 562. An insulative sealing member 58 is filled and solidified in the insertion hole 532. A solidifying material 82 is filled and solidified in the filling recess 54.

Description

  The present invention relates to a conductive structure in a sealed case in which a lead pin electrically connected to an electrical device in the sealed case is fixed by being coupled to a bolt coupling seat outside the sealed case.

  For example, Patent Document 1 discloses a structure in which a lead wire is connected to a stud bolt coupled to a lead pin that is electrically connected to an electric device. The stud bolt disclosed in Patent Document 1 is connected to a lead wire takeout terminal of a metal foil heater via a contact plate and a lead wire. The lead wire lead-out terminal is fixed to a contact plate, and the contact plate is fixed to a stud bolt. The terminal of the lead wire is fixed to the stud bolt by tightening the nut.

  Patent Document 2 discloses a waste heat recovery system using a Rankine cycle. In the waste heat recovery system, a power generator and an expander that applies a rotational force to the drive shaft of the power generator using the waste heat of the waste heat source are provided so that the electricity generated by the power generator is stored in the battery. It has become. Electricity generated by the generator (electrical device) in the generator housing (sealed case) is guided to a lead wire outside the generator housing via lead pins and stud bolts electrically connected to the generator.

  When the refrigerant is introduced into the generator housing in order to increase the power generation efficiency of the generator, the lead pin is sealed with an insulating material such as glass in order to prevent refrigerant leakage along the peripheral surface of the lead pin. It penetrates the member and protrudes outside the generator housing. The sealing member is fixed to the generator housing, and the lead pins are fixed to the stud bolt coupling seats outside the generator housing.

Japanese Utility Model Publication No. 6-44086 JP 2006-242174 A

  However, when the lead wire terminal is fixed to the stud bolt by tightening the nut and the lead wire is connected to the stud bolt, a torsional load is applied to the lead pin. Therefore, the lead pin may be twisted, the lead pin may rotate relative to the sealing member, or the lead pin may be threaded.

  An object of the present invention is to prevent a lead pin protruding from the inside of a sealed case to the outside of the sealed case from being twisted.

  In the present invention, a lead pin that is electrically connected to an electrical device in the sealed case penetrates a sealing member and protrudes out of the sealed case, and the lead pin is outside the sealed case and a bolt coupling seat portion In the invention of claim 1, the sealing case is provided with an opening through which the lead pin is inserted, and the sealing case is provided with a conductive structure in the sealing case fixed to the bolt. The substrate that closes the opening is fixed, the outer surface of the substrate is provided with a filling recess, the substrate is provided with an insertion hole that communicates the opening and the filling recess, The insertion hole is filled with the sealing member, and at least a part of the bolt is disposed in the filling recess, and the filling recess is filled with a solidifying material and solidified. .

  The outside of the sealed case is outside the inner space of the sealed case. The solidifying material is a fluid that is solidified after filling. The coupling seat in the filling recess is fixed in the filling recess by the solidified solidified material, and this tightening load (torsion torque) is received by the solidified material even when a nut is fastened to the bolt. Therefore, there is no possibility that the lead pin is twisted by the twisting torque.

In a preferred example, the filling recess is formed in a recess on the outer surface of the substrate.
In a preferred example, the filling recess is formed by an enclosure wall that is erected and fixed on the outer surface of the substrate.

In a preferred example, a protrusion is provided on the outer surface of the bolt coupling seat.
The protrusion to be embedded in the solidified material contributes to receiving the twisting torque.
In a preferred example, the cross-sectional shape of the bolt coupling seat is a polygon.

In a preferred example, a protrusion is provided on the inner surface of the filling recess.
In a preferred example, the cross-sectional shape of the inner surface of the filling recess is a polygon.
In a preferred example, the solidifying material is an insulating resin.

Insulating resin is particularly suitable as a solidifying material.
In a preferred example, the sealed case is a generator housing that constitutes a waste heat recovery apparatus including an expander that applies a rotational force to a drive shaft of the generator using waste heat of a waste heat source, and The device is the generator.

  When the refrigerant is introduced into the generator housing to cool the generator, the introduced refrigerant does not leak out of the generator housing along the peripheral surface of the lead pin.

  The present invention has an excellent effect that a lead pin protruding from the inside of the sealed case to the outside of the sealed case can be prevented from being twisted.

Sectional drawing of the rotary electric machine which shows 1st Embodiment. The schematic diagram which shows a waste-heat recovery apparatus. (A) is a partial expanded sectional view. (B) is the sectional view on the AA line of Fig.3 (a). (A), (b), (c), (d) is sectional drawing explaining attachment of the lead pin and volt | bolt with respect to a board | substrate. A 2nd embodiment is shown and (a) is a partial expanded sectional view. (B) is the BB sectional drawing of Fig.5 (a). A 3rd embodiment is shown and (a) is a partial expanded sectional view. (B) is CC sectional view taken on the line of Fig.6 (a). A 4th embodiment is shown and (a) is a partial expanded sectional view. (B) is the DD sectional view taken on the line of Fig.7 (a). A 5th embodiment is shown and (a) is a partial expanded sectional view. (B) is the EE sectional view taken on the line of Fig.8 (a). A 6th embodiment is shown and (a) is a partial expanded sectional view. (B) is the FF sectional view taken on the line of Fig.9 (a). The 7th Embodiment is shown and (a) is a partial expanded sectional view. (B) is the GG sectional view taken on the line of Fig.10 (a). The 8th Embodiment is shown and (a) is a partial expanded sectional view. (B) is the HH sectional view taken on the line of Fig.11 (a). A 9th embodiment is shown and (a) is a partial expanded sectional view. (B) is the JJ sectional view taken on the line of Fig.12 (a). A 10th embodiment is shown and (a) is a partial expanded sectional view. (B) is the KK sectional view taken on the line of Fig.13 (a). An eleventh embodiment is shown, (a) is a partial expanded sectional view. (B) is the LL sectional view taken on the line of Fig.14 (a).

Hereinafter, a first embodiment of the present invention will be described with reference to FIGS.
As shown in FIG. 2, the waste heat recovery apparatus 11 includes an engine 12 (combustion engine) as a waste heat source and a Rankine cycle circuit 13.

  In the Rankine cycle circuit 13, the refrigerant heated by the waste heat from the engine 12 circulates. The rotating electrical machine 34 constituting the waste heat recovery apparatus 11 constitutes a part of the Rankine cycle circuit 13.

  As shown in FIG. 1, the entire housing 35 constituting the rotating electrical machine 34 includes a cylindrical center housing 36, a generator housing 37 connected to the front end (left end in FIG. 1) of the center housing 36, and the center housing. 36, and a rear housing 39 connected to the rear end (right end in FIG. 1). In the present embodiment, the generator housing 37 is made of aluminum.

  A drive shaft 40 is rotatably supported via bearings 51 and 52 on a partition wall 361 formed integrally with the center housing 36 and a front end wall 371 of the generator housing 37, and the drive shaft 40 in the generator housing 37 is supported. A rotor 41 is fixed to the rotor. A stator 42 is fixed to the inner peripheral surface of the generator housing 37 so as to surround the rotor 41. The drive shaft 40, the stator 42 provided with the coil 421, and the rotor 41 constitute an alternator 43 (generator). The drive shaft 40 is a rotor shaft of the alternator 43.

The alternator 43 has a function of generating electric power in the coil 421 of the stator 42 as the rotor 41 rotates.
A battery 45 is electrically connected to the alternator 43. Electric power generated by the alternator 43 is stored in the battery 45.

  A side plate 62 is fixed in the rear portion of the center housing 36 so as to face the partition 361. A pump chamber 64 is defined between the partition wall 361 and the side plate 62. The drive shaft 40 passes through the partition 361 and the side plate 62.

  A support block 63 is fixed in the center housing 36. A rotation shaft 70 is rotatably supported by the support block 63 by a bearing 71. The rotary shaft 70 is connected to the drive shaft 40 coaxially with the drive shaft 40.

A scroll type expander 72 is provided in the center housing 36.
Next, the configuration of the expander 72 will be described.
An eccentric shaft 73 is provided at the rear end of the rotation shaft 70. The eccentric shaft 73 revolves around the rotation axis of the rotation shaft 70 by the rotation of the rotation shaft 70. A movable scroll 74 is rotatably supported on the eccentric shaft 73 via a bush 75 and a bearing 76. The movable scroll 74 includes a movable side end plate 741 supported by a bearing 76 and a spiral movable side spiral wall 742 protruding from the movable side end plate 741.

  A fixed scroll 77 is fixed in the rear portion of the center housing 36 so as to face the movable scroll 74. The fixed scroll 77 includes a fixed side end plate 771 and a spiral fixed side spiral wall 772 protruding from the fixed side end plate 771 toward the support block 63. The movable-side spiral wall 742 of the movable scroll 74 and the fixed-side spiral wall 772 of the fixed scroll 77 are meshed with each other to define an expansion chamber 78 whose volume can be changed.

  A supply chamber 79 is defined between the fixed side end plate 771 and the rear housing 39, and a supply port 773 is formed at the center of the fixed side end plate 771 so as to communicate with the supply chamber 79. An introduction port 391 is formed in the rear housing 39. A discharge chamber 80 is formed between the side plate 62 and the support block 63. The refrigerant in the expansion chamber 78 is discharged to the discharge chamber 80. A discharge port 362 is formed on the peripheral wall of the center housing 36 so as to communicate with the discharge chamber 80.

Next, the Rankine cycle circuit 13 in the waste heat recovery apparatus 11 will be described.
As shown in FIG. 2, the Rankine cycle circuit 13 includes an expander 72 that constitutes the rotating electrical machine 34, a condenser 29, a gear pump 67 that constitutes the rotating electrical machine 34, the first boiler 20, and the second boiler 21. Yes.

  The first boiler 20 includes a heat absorber 202 and a heat radiator 201. A heat absorber 202 of the first boiler 20 is connected to the discharge side of the pump chamber 64 (see FIG. 1) in the gear pump 67 via the first flow path 22. The radiator 201 is provided on the cooling water circulation path 23 connected to the engine 12. A radiator 24 is provided on the cooling water circulation path 23. Cooling water (high temperature fluid) that has cooled the engine 12 of the vehicle circulates through the cooling water circulation path 23 and radiates heat by the radiator 201 and the radiator 24.

  The second boiler 21 includes a heat absorber 212 and a heat radiator 211. A heat absorber 212 of the second boiler 21 is connected to the discharge side of the heat absorber 202 of the first boiler 20 via the connection flow path 25. The radiator 211 is provided on the exhaust passage 26 connected to the engine 12. Exhaust from the engine 12 is exhausted from the muffler 27 after radiating heat with the radiator 211. The refrigerant discharged from the gear pump 67 is heated by waste heat from the engine 12 through heat exchange between the heat absorbers 202 and 212 and the radiators 201 and 211 of the first boiler 20 and the second boiler 21.

  An introduction port 391 (see FIG. 1) in the expander 72 is connected to the discharge side of the heat absorber 212 of the second boiler 21 via the supply flow path 28. The high-temperature and high-pressure refrigerant heated by the first boiler 20 and the second boiler 21 is introduced into the expander 72 via the supply flow path 28. The condenser 29 is connected to the discharge port 362 (see FIG. 1) on the expander 72 side via the discharge flow path 30. The low-pressure refrigerant expanded by the expander 72 is discharged to the condenser 29 through the discharge flow path 30. A pump chamber 64 of the gear pump 67 (see FIG. 1) is connected to the downstream side of the condenser 29 via the second flow path 31.

The second flow path 31 is connected to the suction chamber of the pump chamber 64, and the first flow path 22 is connected to the discharge chamber of the pump chamber 64.
The 2nd flow path 31, the 1st flow path 22, the connection flow path 25, the supply flow path 28, and the discharge flow path 30 comprise the circulation refrigerant flow path of a Rankine cycle circuit.

  The discharge passage 47 shown in FIG. 1 is a part of the first flow path 22. A branch passage 48 is branchedly connected to the discharge passage 47. The branch passage 48 opens into the internal space K in the generator housing 37. The internal space K is a region where the alternator 43 is present in the entire housing 35. An outflow passage 50 is provided through the partition wall 361 and the side plate 62 of the center housing 36. The internal space K communicates with the discharge chamber 80 via the outflow passage 50.

  Due to the pumping action of the gear pump 67, the refrigerant in the second flow path 31 is sucked into the pump chamber 64 and discharged from the pump chamber 64. A part of the refrigerant discharged from the pump chamber 64 passes through the heat absorber 202 of the first boiler 20, the connection channel 25, and the heat absorber 212 of the second boiler 21 and is sent to the supply channel 28. The refrigerant that passes through the heat absorber 202 of the first boiler 20 and the heat absorber 212 of the second boiler 21 is heated by waste heat from the engine 12.

  The remainder of the refrigerant sent to the first flow path 22 flows into the internal space K via the branch passage 48. The refrigerant passing through the condenser 29 and flowing through the second flow path 31 is cooled and liquefied, and the liquid refrigerant sent out from the gear pump 67 is at a low temperature. Accordingly, the low-temperature liquid refrigerant that has flowed into the internal space K cools the alternator 43 within the internal space K. The refrigerant that has cooled the alternator 43 flows into the discharge chamber 80 via the outflow passage 50, and the refrigerant that has flowed out into the discharge chamber 80 passes through the discharge port 362, the discharge flow path 30, and the condenser 29 to the gear pump 67. Reflux.

  The high-pressure refrigerant heated by the boilers 20 and 21 is introduced from the introduction port 391 through the supply chamber 79 of the expander 72 into the expansion chamber 78 and expands. Due to the expansion of the refrigerant, the expander 72 outputs mechanical energy (rotation imparting force). That is, the expander 72 applies a rotational force to the rotating shaft 70 and the drive shaft 40 of the alternator 43 using the refrigerant. The refrigerant whose pressure has decreased due to expansion is discharged to the discharge flow path 30. The refrigerant discharged to the discharge passage 30 passes through the condenser 29 and returns to the gear pump 67.

  As shown in FIG. 3A, an outlet 372 as an opening is formed in the outer peripheral surface of the generator housing 37 so as to communicate with the internal space K. A metal substrate 53 is fixed to the outer peripheral surface of the generator housing 37 with screws 32 so as to cover the take-out port 372. A seal member 38 is interposed between the outer peripheral surface of the generator housing 37 and the substrate 53. The seal member 38 prevents refrigerant leakage from between the outer peripheral surface of the generator housing 37 and the substrate 53.

  A filling recess 54 is formed in the outer surface 531 of the substrate 53, and an insertion hole 532 is provided through the bottom 541 of the filling recess 54. A part of a cylindrical coupling seat 56 of the bolt 55 is inserted into the filling recess 54, and a coupling hole 562 is recessed in the outer end surface 561 of the coupling seat 56 in the filling recess 54. Yes. A lead pin 57 is fitted and fixed in the coupling hole 562. The lead pin 57 is inserted into the internal space K through a take-out port 372 that is an opening provided in the generator housing 37 that is a sealed case.

  The insertion hole 532 is filled with an insulating sealing member 58 and solidified. In the present embodiment, the sealing member 58 is glass. The lead pin 57 penetrates the sealing member 58 and protrudes into the generator housing 37 and protrudes outside the generator housing 37. “Outside the generator housing 37” means outside the internal space K of the generator housing 37. The lead pin 57 is electrically connected to the coil 421 through a rectifier (not shown).

  As shown in FIG. 3B, the filling recess 54 is filled with a solidifying material 82 and solidified. In the present embodiment, the solidifying material 82 is an insulating thermosetting resin (for example, epoxy resin). The solidifying material 82 is in close contact with the peripheral surface 563 and the outer end surface 561 of the coupling seat 56 of the bolt 55. The inner end face 564 of the coupling seat 56 is outside the filling recess 54 and exposed from the solidified material 82.

  A nut 60 is screwed into the screw portion 59 of the bolt 55, and a terminal 61 is sandwiched and fixed between the nut 60 and the coupling seat portion 56. The terminal 61 is electrically connected to the battery 45 via the lead wire 81.

Electricity generated with the rotation of the rotor 41 is stored in the battery 45 via the rectifier, the lead pin 57, the bolt 55, the terminal 61 and the lead wire 81.
Next, a procedure for attaching the lead pin 57 and the bolt 55 to the generator housing 37 will be described.

First, as shown in FIG. 4A, the ring-shaped sealing member 58 is attached to the insertion hole 532 of the substrate 53.
Next, as shown in FIG. 4B, the lead pin 57 is passed through the ring of the sealing member 58, and after the glass sealing member 58 is fluidized by heating in this state, the sealing member 58 Is solidified. As a result, the sealing member 58 is in close contact with the peripheral surface of the lead pin 57.

Next, as shown in FIG. 4C, the bolt 55 is coupled to the lead pin 57. This coupling is performed by welding or shrink fitting.
Next, as shown in FIG. 4D, the filling recess 54 is filled with an insulating thermosetting resin 820. Thereafter, the thermosetting resin 820 that is a fluid is cured by heating. The solidifying material 82 is obtained by curing the thermosetting resin 820.

Next, the substrate 53 to which the lead pins 57 and the bolts 55 are fixed is fastened to the outer peripheral surface of the generator housing 37 by tightening the screws 32.
Next, the operation of the first embodiment will be described.

  When the base plate 53 is screwed to the generator housing 37 and then the nut 60 is tightened so that the terminal 61 attached to the lead wire 81 is sandwiched between the inner end surface 564 of the coupling seat portion 56 and the nut 60, the torsion torque Is applied to the bolt 55. The solidified material 82 is in close contact with the peripheral surface 563 and the outer end surface 561 of the coupling seat portion 56, and the coupling seat portion 56 of the bolt 55 is fixed by the solidifying material 82 in the filling recess 54. Therefore, the twisting torque is finally received by the generator housing 37 via the solidifying material 82, the substrate 53, and the screw 32. As a result, the spread of torsional torque to the lead pin 57 is suppressed.

Since the sealing member 58 is in close contact with the peripheral surface of the lead pin 57, the refrigerant in the generator housing 37 does not leak out of the generator housing 37 along the peripheral surface of the lead pin 57.
In the first embodiment, the following effects can be obtained.

  (1) The coupling seat 56 in the filling recess 54 is fixed in the filling recess 54 by a solidified solidified material 82. Even when the nut 60 is fastened to the bolt 55, this tightening load (torsion torque) ) Is received by the solidified material 82 fixed to the substrate 53. Therefore, the lead pin 57 is not threaded by the twisting torque.

(2) The material of the solidifying material 82 is an insulating thermosetting resin. Therefore, the solidifying material 82 prevents a short circuit between the metal substrate 53 and the bolt 55.
(3) The alternator 43 (generator) in the waste heat recovery apparatus that introduces the refrigerant into the generator housing 37 to cool the alternator 43 (generator) prevents both refrigerant leakage and damage to the lead pin 57. It is particularly suitable as an electric device in the sealed case of the present invention to achieve.

Next, a second embodiment shown in FIGS. 5A and 5B will be described. The same reference numerals are used for the same components as those in the first embodiment, and detailed description thereof is omitted.
As shown in FIG. 5A, an insertion hole 532A is provided through the substrate 53A, and a lead pin 57 is inserted through the sealing member 58 in the insertion hole 532A. An enclosure wall 83 is erected on the outer surface 531 of the substrate 53A.

As shown in FIG. 5B, the ring of the enclosure wall 83 is filled with a solidifying material 82.
In the second embodiment, the same effect as in the first embodiment can be obtained.
Next, a third embodiment shown in FIGS. 6A and 6B will be described. The same reference numerals are used for the same components as those in the first embodiment, and detailed description thereof is omitted.

  A plurality of insertion holes 565 are recessed in the outer end surface 561 of the coupling seat 56 of the bolt 55, and a projection 84 is press-fitted into each insertion hole 565. The solidified material 82 in the filling recess 54 is in close contact with the surfaces of the plurality of protrusions 84. The protrusion 84 has a pressure receiving area that receives a reaction force against the twisting torque from the solidifying material 82. The plurality of protrusions 84 having a pressure receiving area in the twisting direction of the bolt 55 contributes to the prevention of the rotation of the bolt 55 due to the twisting torque.

Next, a fourth embodiment shown in FIGS. 7A and 7B will be described. The same reference numerals are used for the same components as those in the first embodiment, and detailed description thereof is omitted.
A plurality of protrusions 85 (four in the present embodiment) are fixed to the peripheral surface 563 and the outer end surface 561 of the coupling seat 56 of the bolt 55, and the solidified material 82 in the filling recess 54 is formed of the protrusion 85. It is in close contact with the surface. The plurality of protrusions 85 contribute to the prevention of the rotation of the bolt 55 due to the twisting torque.

Next, a fifth embodiment shown in FIGS. 8A and 8B will be described. The same reference numerals are used for the same components as those in the first embodiment, and detailed description thereof is omitted.
A plurality of projections 86 (two in this embodiment) are integrally formed on the outer end surface 561 of the coupling seat portion 56 of the bolt 55, and the solidified material 82 in the filling recess 54 is in close contact with the surface of the projection 86. ing. The plurality of protrusions 86 contribute to the prevention of the rotation of the bolt 55 due to the twisting torque.

Next, a sixth embodiment shown in FIGS. 9A and 9B will be described. The same reference numerals are used for the same components as those in the first embodiment, and detailed description thereof is omitted.
A plurality of projections 87 (four in this embodiment) are integrally formed on the peripheral surface 563 of the coupling seat 56 of the bolt 55, and the solidified material 82 in the filling recess 54 is in close contact with the surface of the projection 87. ing. The plurality of protrusions 87 contribute to the prevention of the rotation of the bolt 55 due to the twisting torque.

Next, a seventh embodiment shown in FIGS. 10A and 10B will be described. The same reference numerals are used for the same components as those in the first embodiment, and detailed description thereof is omitted.
The coupling seat portion 56 </ b> A of the bolt 55 includes a sub seat portion 88 formed integrally with the screw portion 59, and a main seat portion 89 coupled to the sub seat portion 88. A plurality of protrusions 90 (four in this embodiment) are integrally formed on the peripheral surface of the main seat portion 89, and the solidified material 82 in the filling recess 54 is in close contact with the surface of the protrusion 90. The plurality of protrusions 90 contribute to the prevention of the rotation of the bolt 55 due to the twisting torque.

Next, an eighth embodiment shown in FIGS. 11A and 11B will be described. The same reference numerals are used for the same components as those in the first embodiment, and detailed description thereof is omitted.
The cross-sectional shape of the coupling seat portion 56B of the bolt 55 is formed in a square shape. The coupling seat portion 56 </ b> B having a quadrangular cross-sectional shape has a pressure receiving area in the twisting direction of the bolt 55. That is, the coupling seat portion 56B having a quadrangular cross-sectional shape is superior in performance to prevent the bolt 55 from rotating due to torsional torque as compared to the case of the cylindrical coupling seat portion 56. Further, the same effect can be obtained even when other polygonal shapes are used instead of the rectangular shape.

Next, a ninth embodiment shown in FIGS. 12A and 12B will be described. The same reference numerals are used for the same components as those in the first embodiment, and detailed description thereof is omitted.
56 C of coupling seats of the volt | bolt 55 are formed in the column shape, and the serration 91 is given to the surrounding surface of 56 C of coupling seats. The serration 91 contributes to the prevention of the rotation of the bolt 55 due to the twisting torque. Further, a knurl may be formed instead of serration.

Next, a tenth embodiment shown in FIGS. 13A and 13B will be described. The same reference numerals are used for the same components as those in the first embodiment, and detailed description thereof is omitted.
A plurality of circular hole-shaped insertion holes 566 (two in this embodiment) are recessed in the outer end surface 561 of the coupling seat portion 56 of the bolt 55, and a pin-shaped protrusion 92 is formed in each insertion hole 566. It is press-fitted. A bifurcated engagement member 93 is engaged with each protrusion 92. The protrusion 92 is disposed between a pair of arm portions 931 and 932 that constitute a bifurcated portion of the engaging member 93, and the pair of arm portions 931 and 932 engage with the protrusion 92. The solidified material 82 in the filling recess 54 is in close contact with the surface of the protrusion 92 and the engaging member 93. Note that at least one of the protrusion 92 and the engaging member 93 is formed of an insulating material to prevent the lead pin 57 and the substrate 53 from being short-circuited.

The protrusion 92 and the engaging member 93 contribute to the prevention of the rotation of the bolt 55 due to the twisting torque.
Next, an eleventh embodiment shown in FIGS. 14A and 14B will be described. The same reference numerals are used for the same components as those in the tenth embodiment, and detailed description thereof is omitted.

  The sealing member 58 is filled up to the middle of the insertion hole 532, and the solidification material 82 is filled in the remaining part of the insertion hole 532. A plurality of concave portions 94 (two in the present embodiment) are formed in the corner between the peripheral wall surface of the insertion hole 532 and the bottom portion 541 of the filling concave portion 54, and a projection 95 is fitted in each concave portion 94. Has been. The solidified material 82 in the filling recess 54 is in close contact with the surface of the protrusion 95 provided on the inner surface of the filling recess 54. The protrusion 95 is made of an insulating material and prevents the lead pin 57 and the substrate 53 from being short-circuited.

Torsion torque applied to the bolt 55 is received by the substrate 53 via the protrusion 95 and the recess 94.
In the present invention, the following embodiments are also possible.

The substrate that closes the opening may be fixed to the inner surface instead of the outer surface of the sealed case.
○ There may be one protrusion or insertion hole instead of a plurality.
The cross sectional shape of the bolt coupling seat may be a non-uniform polygon such as a rectangle, a rhombus, or a chamfered polygon other than a regular polygon.

  A through hole may be provided in the radial direction of the coupling seat portion, and a pin may be passed through this through hole so that the end of the pin protrudes from both openings of the through hole. The ends of the pins protruding from both openings of the through holes are protrusions provided on the outer surface of the coupling seat.

The protrusion for preventing rotation may be provided on the bottom of the filling recess or on the peripheral wall surface.
The cross-sectional shape of the bolt fastening seat portion may be a polygon other than a quadrangle, and the cross-sectional shape of the recess on the outer surface of the substrate that becomes the filling recess and the inner surface of the surrounding wall may be a quadrangle or other polygons.

  O You may make it provide a waterproof function, for example by arrange | positioning a sealing member between a board | substrate and a solidification material. By doing so, it is possible to prevent rainwater or the like from passing through the gap between the substrate and the solidifying material and causing an electrical short circuit between the lead pin and the substrate.

  11 ... Waste heat recovery device. 37 ... Generator housing as a sealed case. 372: A take-out port as an opening. 40: Drive shaft. 43: An alternator which is a generator as an electric device. 53. Substrate. 532 ... insertion hole. 531 ... The outer surface. 54: Filling recess. 55 ... Bolt. 56, 56A, 56B, 56C ... Seat for coupling. 57: Lead pin. 58 ... Sealing member. 72 ... Expander. 82 ... Solidified material. 83 ... Fence wall. 84, 85, 86, 90, 92, 95 ... projections.

Claims (9)

A lead pin electrically connected to an electrical device in the sealed case penetrates the sealing member and protrudes out of the sealed case, and the lead pin is coupled to a bolt coupling seat outside the sealed case. In the conductive structure in the sealed case fixed to the bolt with
The sealing case is provided with an opening through which the lead pin is inserted,
A substrate for closing the opening is fixed to the sealing case,
The outer surface of the substrate is provided with a filling recess,
The substrate is provided with an insertion hole that communicates the opening and the filling recess,
The insertion member is filled with the sealing member,
At least a portion of the bolt is disposed in the filling recess;
The conductive structure in a sealed case in which the filling recess is filled with a solidifying material and solidified.   The conductive structure in the sealed case according to claim 1, wherein the filling recess is formed in a recess on an outer surface of the substrate.   2. The conductive structure in a sealed case according to claim 1, wherein the filling recess is formed by an enclosure wall that is erected and fixed on an outer surface of the substrate.   The conductive structure in the sealed case according to claim 1, wherein a protrusion is provided on an outer surface of the coupling seat portion of the bolt.   The conductive structure in the sealing case according to any one of claims 1 to 4, wherein a cross-sectional shape of the coupling seat portion of the bolt is a polygon.   The conductive structure in the sealed case according to any one of claims 1 to 5, wherein a protrusion is provided on an inner surface of the filling recess.   The conductive structure in the sealed case according to any one of claims 1 to 6, wherein a cross-sectional shape of the inner surface of the filling recess is a polygon.   The conductive structure in the sealed case according to any one of claims 1 to 7, wherein the solidifying material is an insulating resin.   The sealed case is a generator housing that constitutes a waste heat recovery apparatus including an expander that applies a rotational force to a drive shaft of a generator by using waste heat of a waste heat source, and the electric device includes the power generator The conductive structure in a sealed case according to claim 1, wherein the conductive structure is a machine.

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