JP2009283216A - High-voltage connector - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a high-voltage connector can prevent generation of discharge current and eliminate loss of supply power. <P>SOLUTION: A cylindrical body 164 is provided in the high-voltage connector 160 fixed to a high-voltage impressed part 122 while surrounding an exposed face 165x of an in-chamber terminal cylindrical body 165, and so plays a role of an insulation wall, whereby, flow of discharge current tracing the shortest route Da is blocked. In such a case, at a surface route Db going via a surface of the cylindrical body 164, a total length of the surface route Db is elongated by the cylindrical body 164 by appropriately setting a height of the cylindrical body, so that the discharge current shall not reach from the exposed face 165x of the connector terminal 165 to an upper lid part 122a of the high-voltage impressed part. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a high voltage connector, and is particularly suitable for use when connected to a structure requiring a high voltage.

  The relay terminal that outputs the power input from one side to the other consists of an insulating casing and a conductive terminal body, and is connected to a terminal receiver provided in a predetermined device, thereby supplying the relay terminal The transmitted power is transmitted to the predetermined device. Such a relay terminal includes a connector that constantly maintains the electrical connection between the device and the power supply wiring and reliably supplies power to the device, or a power switch that realizes ON / OFF switching along with the role of the connector. Used.

  For example, Japanese Patent Laid-Open No. 11-040020 (Patent Document 1) introduces a pressure switch of a hydraulic pump. Such a pressure switch is composed of a plug made of an insulating material, a giboshi type terminal made of a conductive material, and a plunger. The plug has a flange formed at the end of a cylindrical body with a male thread tapped on the outer peripheral surface. Further, the flange constituting the plug has a hole formed therein, and a giboshi terminal is inserted into the hole. Further, a plunger is slidably fitted in the cylindrical body constituting the plug. A spring is provided between the giboshi terminal and the plunger, and the spring is biased in a state where the giboshi terminal and the plunger are not in contact with each other. In such a pressure switch, a plug is screwed into a female thread tap of a predetermined body, and hydraulic pressure is applied to the plunger. Here, when an oil pressure of a predetermined level or more is applied to the other end of the plunger, the contact surface of the plunger is brought into contact with the Gibboshi terminal, whereby electric power is supplied to the Gibboshi terminal and the hydraulic pump connected to the Gibboshi terminal. The motor performs a predetermined operation.

JP-A-11-040020

However, in the technique of Patent Document 1, when the predetermined body to which the pressure switch is attached is a conductive material, when the power supplied to the plunger is high, a discharge occurs in the vicinity of the contact surface of the plunger and the gibboshi terminal. A problem arises in that a discharge current flows through the conductive vehicle structure, causing a loss of power supply. When such a discharge current is generated, there arises a problem that desired power cannot be supplied. In particular, since an exhaust gas purification apparatus mounted on a vehicle requires a high voltage, it is desirable to suppress the generation of the discharge current and to eliminate some of the power loss.

  In addition, when the above-described connector is applied as a relay terminal, when such a discharge current is generated, the discharge current is grounded to the grounding part through the vehicle structure. There is also a problem of electric shock. Here, in order to prevent such a discharge current from flowing, a method of impregnating the space inside the connector with an insulating resin is also conceivable. However, such a method may lead to complicated manufacturing processes and complicated parts replacement work. Problem arises.

  Furthermore, in a device mounted on a vehicle, if the device is arranged in a state exposed to the outside of the vehicle body, rain water or washing water sprayed at the time of car washing submerges the inside of the device and causes electric leakage inside the relay terminal. The problem also arises. In addition, when a connector is applied as a relay terminal, if the humidity of the gas distributed around the exposed terminal inside the connector increases, the number of molecules that can be ionized increases accordingly, and the discharge current described above is generated. There is also a concern that it will be easily done.

  In view of the above problems, an object of the present invention is to provide a high-voltage connector that can prevent the generation of a discharge current and can simplify the work of replacing and replacing.

  In order to solve the above problems, the present invention has the following configuration of a high-voltage connector. That is, a high-voltage connector comprising a housing made of an insulating material fixed to a conductive structure and a conductive connector terminal body arranged in the housing and applied with a high voltage from the outside of the housing The connector terminal body includes at least an indoor terminal disposed in the interior of the conductive structure, and the housing is connected to an exposed surface of the indoor terminal and / or the indoor terminal. A cylindrical body surrounding the exposed surface of the structure-side terminal body, and a continuous exposed surface is formed by the inner surface of the cylindrical body and at least a part of the outer surface of the cylindrical body. It is said.

  Preferably, a surface path from the terminal disposed on the inner surface side of the cylindrical body to the conductive structure via the cylindrical body is extended by the cylindrical body, and the surface path is It is assumed that the distance is set to prevent the flow of the discharge current propagating along. On the other hand, the space path from the terminal arranged on the inner surface side of the cylindrical body to the conductive structure through the space formed inside the conductive structure is formed by the cylindrical body. It may be set to a distance that prevents the flow of the discharge current that is elongated and propagates along the spatial path.

  More preferably, the casing is provided with a seal body that provides a waterproof function between the casing and the conductive structure.

  More preferably, the connector terminal body further includes an outdoor terminal connected to an external terminal body for applying an external high voltage, and the outdoor terminal is disposed on the outdoor side of the conductive structure. I will do it.

  More preferably, the conductive structure is a high voltage application unit of an exhaust gas purification device mounted on a vehicle.

  According to the high voltage connector of the present invention, since the insulating cylindrical body is disposed between the exposed surface of the terminal and the structure made of the conductive material, the exposed surface of the terminal leads to the structure of the conductive material. Thus, the discharge current does not flow from the exposed surface of the terminal arranged in the chamber of the conductive structure in the high-voltage connector. Also, the problem of electric shock due to the discharge current is solved.

  Further, since such a high-voltage connector is provided with a seal body, the inside of the conductive structure is sealed, thereby suppressing the generation of discharge current or preventing the ingress of water from the outside. Is prevented from leaking.

  Furthermore, the high-voltage connector according to the present invention ensures the insulation of the internal space without filling the internal space of the high-voltage connector with an insulating resin, thereby simplifying the mounting or replacing operation of the high-voltage connector. It is done. In addition, since the high voltage generated by the vehicle control device is applied to the exhaust gas removal device mounted on the vehicle, the high voltage connector according to the present invention is suitable for use in such an exhaust gas removal device. The

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows the configuration of an exhaust gas purification system for an internal combustion engine according to the present embodiment. The exhaust gas purification system 100 includes an internal combustion engine 110, an exhaust gas purification device (hereinafter referred to as a DPF device) 120, a vehicle control device 130, a silencer 140, and an in-vehicle battery 150.

  The internal combustion engine 110 is a diesel engine driven using light oil or heavy oil, and mainly includes vehicles (including large vehicles such as trucks and buses, railway vehicles), construction machinery, agricultural machinery, ships, military vehicles, and the like. Applies to

  The DPF device 120 incorporates a DPF (Diesel Particulate Filter), and reduces particulates (carbonized fine particles and the like) contained in the exhaust gas of the diesel engine. In the present embodiment, any regeneration method in the DPF can be applied, and various regeneration methods such as an alternate regeneration method, a continuous regeneration method, or an intermittent regeneration method can be appropriately selected.

  The vehicle control device 130 is a device mounted on the vehicle body and stores a circuit for driving the DPF device 120. The vehicle control device 130 may be integrated in an ECU (Engine Control Unit) that controls the internal combustion engine.

  The muffler 140 is appropriately configured with a muffler structure, and reduces the exhaust discharge sound of the internal combustion engine. The exhaust gas that has passed through the silencer 140 is released to the outside air. The in-vehicle battery 150 is mounted on a predetermined part of the vehicle and supplies power to the vehicle control device 130.

  In the exhaust gas purification system 100 having such a configuration, when exhaust gas is discharged from the internal combustion engine 110, the exhaust gas passes through the connection pipe CP1 and is guided to the DPF device 120. At this time, the DPF device 120 is driven based on a command from the vehicle control device 130, whereby particulates are adsorbed to the exhaust gas by the DPF, and contaminants contained in the exhaust gas are reduced to a predetermined value. The Thereafter, the purified exhaust gas is guided to the silencer 140, and after being silenced, is discharged to the outside air.

  In the figure, the internal configurations of the DPF device 120 and the vehicle control device 130 described above are shown, and these configurations will be specifically described below.

  In the DPF device 120, the connection pipe CP1 and the connection pipe CP2 are connected by a flange, and the exhaust gas discharged from the internal combustion engine 110 is drawn into the DPF device 120. The DPF device 120 includes a discharge terminal 170 and a filter DPF. The discharge terminal 170 is supplied with electric power from the high voltage connector 180 and generates corona discharge. The filter DPF is made of a porous ceramic body or a porous metal body such as stainless steel, and adsorbs particulates contained in the exhaust gas. Further, the filter DPF is provided with a heater for burning the adsorbed particulates, thereby regenerating the adsorption performance of the filter DPF.

  Further, in the DPF device 120, a high voltage application unit (conductive structure in claims) 122 connected to the high voltage connector 160 is provided, and the high voltage connector 160 and the discharge terminal 170 are electrically connected. ing. Here, when a high voltage is supplied from the vehicle control device 130, the high voltage is applied to the high voltage connector 180 via the power supply line La, and then output from the high voltage connector 180 to the discharge terminal 170. Corona discharge is generated at the discharge terminal 170. The configuration of the high voltage connector 160 will be described in detail later.

  The vehicle control device 130 is connected to the in-vehicle battery 150, and power is supplied from the in-vehicle battery 150. Such a vehicle control device 130 includes a power supply circuit 131 and a control circuit 132 therein. The power supply circuit 131 appropriately adjusts the power supplied from the in-vehicle battery 150 and supplies the high voltage power to the high voltage connector 180 via the power supply line La. The control circuit 132 detects the pressure on the upstream side and the downstream side of the filter DPF, and controls the DPF device 120 based on the differential pressure between these pressures.

  The exhaust gas purification system having such a configuration operates as follows. That is, when exhaust gas containing particulates is supplied from the internal combustion engine, the exhaust gas is guided to the discharge terminal 170 through the connection pipe CP2. At the same time, the vehicle control device 130 supplies the electric power adjusted to a desired value to the high-voltage connector 160 and generates corona discharge at the discharge terminal 170. At this time, the particulates contained in the exhaust gas are ionized according to the corona discharge, so that they are easily adsorbed by the porous body when passing through the filter DPF. The exhaust gas in such a state is guided to the filter DPF, subjected to an adsorption process, and then guided to the silencer 140 through the connection pipe CP3.

  FIG. 2 shows a partially enlarged view of the DPF device. As illustrated, the outside of the DPF device 120 is covered with a casing 121. The housing 121 is made of a conductive metal, and stores an internal device by a side surface 121a and an end surface 121b. Referring to the figure, a connection pipe CP2 and a high voltage application unit 122 are provided on the end surface 121b.

  The connection pipe CP2 is made of, for example, a material such as stainless steel or steel, and the pipe portion is sealed and welded to the end surface 121b. Further, a flange having an opening is sealed and welded to the pipe portion, and is connected to the connection pipe CP1 of the internal combustion engine by the flange.

  The high voltage application unit 122 is a conductive box having a rectangular flange, and is fixed to the end surface 121b by bolts and nuts. As shown in the figure, a high voltage connector 160 is connected to the high voltage application unit 122, and an external connection body 180 is connected to the high voltage connector 160. Since the high-voltage connector 160 is configured to electrically connect the external connection body 180 conducted to the power supply line La and the discharge terminal 170 disposed in the DPF device 120, the high-voltage connector 160 is connected to the high-voltage connector 160 via the power supply line La. When the voltage is supplied, the high voltage is output to the discharge terminal 170.

  FIG. 3 shows a configuration of the high-voltage connector 160 according to the present embodiment. In addition, in the same figure, the state which observed the AA cross section in FIG. 2 in the arrow line direction is shown. As shown in the drawing, the high-voltage connector 160 includes a housing 160 a and a connector terminal body 165.

  The casing 160a is integrally formed with a flange portion 161, a head structure portion 162, a boss portion 163, and a cylindrical body 164. The casing 160a is made of an insulating material such as PBT (Poly Butylene Terephthalate) or PET (Poly Ethylene Terephthalate), PPS (Poly Phenylene Sulfide), PPO (Poly Phenylene Oxide), PS (Poly Styrene), or the like. A thermoplastic resin as a main component is used.

  The flange portion 161 is formed in a circular or polygonal plate, and a perforated portion 161a for inserting a bolt is appropriately provided. An annular groove portion R is formed on the surface of the flange portion 161 where the cylindrical body 164 is formed, and an O-ring is embedded in the groove portion R.

  The head structure 162 is formed on the surface of the flange 161 that faces the surface on which the groove R is disposed. The head structure portion 162 includes an outer ring portion 162a formed in a cylindrical shape and an inner ring portion 162b formed coaxially to the inside of the outer ring portion 162a. Here, a tapered hole is formed in the inner ring portion 162b, and the cross-section of the hole is gradually reduced in diameter according to the depth.

  The boss portion 163 is formed on the surface facing the head structure portion 162 and is formed coaxially with the inner ring portion 162 of the head structure portion 162. Further, the boss portion 163 has a hole having the same diameter as the outer peripheral surface of the connector terminal body 165, and the hole portion communicates with the hole formed in the inner ring portion 162b. Here, a stepped surface 162c is formed at a portion where the hole formed in the boss portion 163 and the hole formed in the inner ring portion 162b are connected.

  The cylindrical body 164 has a substantially cylindrical shape with a bottom, and forms an outer surface 164a and an inner surface formed in a circumferential shape. The cylindrical body 164 is formed on the same surface side as the boss portion 163 and is arranged coaxially with the central axis of the boss portion 163.

  The connector terminal body 165 has an outer peripheral surface formed in a circular shape, and terminals 165 b and 165 c are formed at both ends of the connector terminal body 165. The terminal 165b is formed with a circular hole, and a slit 165a is formed at the end of the terminal 165b. With this configuration, when the terminal 165b is connected to the giboshi terminal, the shape of the terminal 165b is appropriately deformed, and a predetermined fixing force is applied while the giboshi terminal is fitted. The connector terminal body 165 is impregnated with the casting material in a process of casting a thermoplastic resin. Therefore, as shown in the drawing, one end of the connector terminal body 165 is accommodated in the cylindrical body 164 and a part of the outer peripheral surface of the connector terminal 165 is exposed at the other end. It is fixed in a state where the inside and outside of 160 can be conducted.

  FIG. 4 shows a state where the high voltage connector 160 is connected to the high voltage application unit 122 of the DPF device 120. In addition, in the same figure, the state which observed the AA cross section in FIG. 2 in the arrow line direction is shown.

  As shown in the figure, the high voltage applying part 122 is welded so that the upper wall part 122a, the side wall part 122b, and the flange part 122c are integrated. The upper wall portion 122a is a rectangular plate, and is provided with a circular opening 122d having the same diameter as the cylindrical body 164. Moreover, the high voltage | pressure connector 160 is suitably provided with the bolt hole in the position corresponding to the perforated part 161a, and the cap nut NTa is welded to the position of the said bolt hole. The side wall portion 122b is laid out so as to form a prism, and seal welding is performed on all contact surfaces. Further, the flange 121b is welded to the bottom of the prism formed by the side wall 122b. The flange portion 122c has a central hole through which the insulator column 121c is inserted and a plurality of bolt holes. Then, the insulator column 121c is inserted into the center hole of the flange portion 122c, and the bolt BTb is screwed from the flange portion 122c, whereby the high voltage applying portion 122 and the end surface 121b of the DPF device 120 are fixed. Note that a giboshi terminal TA (a structure-side terminal body in claims) is fixed to the tip of the insulator column 121c, and the giboshi terminal TA is electrically connected to the discharge terminal 170.

  When the high voltage connector 160 is fixed to the high voltage application unit 122, first, the cylindrical body 164 of the high voltage connector 160 is inserted through the circular opening 122d formed in the upper lid 122b. At this time, the cylindrical body 164 of the high-voltage connector 160 surrounds the exposed surface 165x of the bullet terminal TA together with the exposed surface 165x of the connector terminal body 165, and the head of the bullet terminal TA is connected to the terminal 165b of the connector terminal body 165. Inserted. Then, after the connection between the terminals is completed as described above, the flange portion 161 is fixed by the bolt BTa.

  At this time, as shown in the drawing, since the O-ring Or is provided between the casing 160a of the high-voltage connector 160 and the high voltage applying unit 122, the indoor airtightness of the high voltage applying unit 122 is ensured. Thus, a sufficient waterproof function is imparted to the contact surface between the high voltage connector 160 and the high voltage application unit 122. In this embodiment, an O-ring is used as the seal body. However, the present invention is not limited to this, and a flat packing may be used. Here, the material of the member used as the sealing means is preferably selected from fluorine-based synthetic rubber. Thereby, even if fuel, such as gasoline, or exhaust gas adheres, a deterioration rate is suppressed remarkably compared with fluororubber.

  Then, the external terminal body 180 indicated by a dotted line is connected to the head structure portion 162 of the high-voltage connector 160. The external terminal body 180 includes a connection portion 181, a terminal portion 182, and a power supply line La. The connecting portion 181 is made of an insulating elastic body and has a bottomed cylindrical body. In the connection part 181, a terminal part 181 is provided, and the terminal part 181 and the copper wire of the power supply line La are electrically connected. When the external terminal body 180 is connected to the head structure portion 162, the terminal portion 181 of the external terminal body 180 and the connector terminal body 165 of the high-voltage connector 160 are electrically connected. Therefore, when a high voltage is supplied from the vehicle control device 130, the high voltage is transmitted through the power supply line La, so that the connector terminal body 165 is connected to the external terminal body 180 (the housing in the claims). A high voltage is applied from the outside. Such a high voltage is applied to the glossy terminal TA via the connector terminal body 165, and thereafter, the discharge terminal 170 disposed in the DPF device 120 is appropriately discharged.

  As shown in the figure, the high-voltage connector 160 fixed to the high voltage application unit 122 is provided with a cylindrical body 164 in a state of surrounding the exposed surface TAx of the giboshi terminal TA or the exposed surface 165x of the indoor terminal cylindrical body 165. Therefore, the cylindrical body 164 serves as an insulating wall, thereby interrupting the flow of the discharge current that follows the shortest path Da. In such a case, in the surface path Db passing through the surface of the cylindrical body 164, the entire length of the surface path Db is extended by the cylindrical body 164 by appropriately setting the height of the cylindrical body, thereby The discharge current does not reach the upper cover 122a of the high voltage application section from the exposed surface 165x of the connector terminal 165. That is, the discharge current propagating along the surface path Db is prevented from flowing by the shape of the cylindrical body 164. At this time, it is preferable that a continuous exposed surface is formed by the inner surface 164b and the outer surface 164a of the cylindrical body 164. Thereby, the surface path | route Db will keep the full length in a suitable length, utilizing the height of a cylindrical body effectively.

  Further, as shown in the figure, the discharge current is generated in a space formed in the room of the high voltage applying unit 122 from the giboshi terminal TA or the indoor terminal 165 (terminal disposed on the inner surface side of the cylindrical body in the claims). In some cases, a spatial route Dc to the wall surface 122b is traced. However, in the high-voltage connector 160 according to the present embodiment, the height of the cylindrical body is appropriately set, so that the entire length of the space path Dc is extended by the cylindrical body 164, and thereby, from the exposed surface of the terminal. The discharge current does not reach the side wall 122b of the high voltage application unit 122.

  As described above, according to the high voltage connector 160 according to the present embodiment, the insulating cylindrical body 160 is disposed between the exposed surface of the terminal and the structure of the high voltage application unit 122 made of a conductive material. The path extending from the exposed surface of the terminal to the structure of the high voltage application unit 122 made of a conductive material is extended, so that in the high voltage connector 160, from the exposed surface of the terminal inside the high voltage application unit 122. Discharge current stops flowing. Also, the problem of electric shock due to the discharge current is solved.

  In addition, since the high-voltage connector 160 is provided with an O-ring Or, the inside of the high voltage application unit 122 is hermetically sealed, thereby suppressing generation of a discharge current or preventing water from entering from the outside. , Leakage inside the high voltage connector is prevented.

  Furthermore, the high-voltage connector according to the present invention ensures the insulation of the internal space without filling the internal space of the high-voltage connector with the insulating resin, so that the high-voltage connector can be easily attached or replaced. Is planned. In addition, since the high voltage generated by the vehicle control device 130 is applied to the exhaust gas removal device 120 mounted on the vehicle, the high voltage connector 160 according to the present embodiment is used for the exhaust gas removal device 120. And suitable.

The figure which shows the structure of the exhaust gas removal system which concerns on this Embodiment The figure which shows the high voltage application part provided in the exhaust gas removal apparatus which concerns on this Embodiment The figure which shows the cross section of the high voltage | pressure connector which concerns on this Embodiment The figure which shows the usage example of the high voltage | pressure connector which concerns on this Embodiment

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 Exhaust gas removal system 110 Internal combustion engine 120 Exhaust gas removal apparatus 122 High voltage application part (electroconductive structure)
DESCRIPTION OF SYMBOLS 130 Vehicle control apparatus 140 Silencer 150 Car-mounted battery 160 High voltage | pressure connector 161 Housing | casing 164 Cylindrical body 164a Inner surface 164b Outer surface Db Surface path 165x Exposed surface of an indoor side terminal 165 Connector terminal body 165b Indoor side terminal 165c Outdoor side terminal Or Seal body 170 External terminal body

Claims (6)

In a high-voltage connector comprising a housing made of an insulating material fixed to a conductive structure, and a conductive connector terminal body that is arranged in the housing and to which a high voltage is applied from the outside of the housing,
The connector terminal body is formed with at least indoor side terminals arranged in the interior of the conductive structure,
The casing includes a cylindrical body that surrounds the exposed surface of the indoor terminal and / or the exposed surface of the structure-side terminal body connected to the indoor terminal, and the inner surface of the cylindrical body and the cylindrical surface A high-pressure connector characterized in that a continuous exposed surface is formed by at least a part of the outer surface of the body.   The surface path from the terminal disposed on the inner surface side of the cylindrical body to the conductive structure via the cylindrical body is extended by the cylindrical body and propagates along the surface path. The high-voltage connector according to claim 1, wherein the high-voltage connector is set to a distance that prevents a flow of discharge current from flowing.   A space path extending from the terminal disposed on the inner surface side of the cylindrical body to the conductive structure through a space formed inside the conductive structure is extended by the cylindrical body. The high-voltage connector according to claim 1, wherein the high-voltage connector is set to a distance that prevents a flow of discharge current propagating along the space path.   The high-voltage connector according to any one of claims 1 to 3, wherein the casing is provided with a seal body that provides a waterproof function between the casing and the conductive structure. The connector terminal body is further formed with an outdoor terminal connected to an external terminal body for applying an external high voltage,
5. The high-voltage connector according to claim 1, wherein the outdoor terminal is disposed on an outdoor side of the conductive structure.   The high-voltage connector according to claim 1, wherein the conductive structure is a high voltage application unit of an exhaust gas purification device mounted on a vehicle.

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