JP4816149B2 - Connection wire presser structure - Google Patents

Description

  The present invention generally relates to a connection line pressing structure, and more particularly to a connection line pressing structure suitably applied to a miniaturized motor.

  Regarding the conventional wiring structure, for example, Japanese Patent Application Laid-Open No. 2004-328932 secures insulation between a plurality of connecting portions that respectively connect a plurality of terminals of a motor and a plurality of terminals of an inverter that drives the motor. However, a motor unit aimed at reducing the size of the terminal block is disclosed (Patent Document 1). The motor unit disclosed in Patent Document 1 includes a terminal block that connects a terminal of each phase coil of the motor and a terminal of the inverter, and an attachment member that is attached to the terminal block. A groove is formed between three connection portions of the terminal block that connect both terminals of the motor and the inverter. The mounting member is formed with an electrically insulating rib that fits in the groove.

Japanese Patent Application Laid-Open No. 11-234964 discloses a temperature detection structure for a motor intended to reduce variation in detection temperature with a small number of temperature detection elements (Patent Document 2). In Patent Document 2, a thermistor as a temperature detection element is disposed in the vicinity of the neutral point terminal of the brushless motor.
JP 2004-328932 A JP-A-11-234964

  In the motor unit disclosed in Patent Document 1 described above, it is necessary to provide an attachment member having a shape that surrounds the entire connection portion, so there is room for improvement in terms of miniaturization and cost of the motor. Further, when trying to reduce the size of the motor, the distance between the stator terminal and the connecting wire (lead wire) of the electric device connected to the motor becomes small, so that a problem arises in that both are in contact with each other.

  SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to solve the above-mentioned problems and provide a connection line pressing structure that reliably prevents contact between the stator terminal and the connection line even when the motor is downsized. It is to be.

  The connection line pressing structure according to the present invention includes a motor having a stator, a stator terminal provided on a wiring extending from the stator, a connection line extending from an electric device disposed in the vicinity of the motor, and a pressing of the connection line. And a pressing member for holding the connection line at a position spaced from the stator terminal.

  According to the pressing structure of the connecting wire configured as described above, even if the connecting wire is routed in the vicinity of the stator terminal due to the miniaturization of the motor, the stator terminal and the connecting wire are pressed by the pressing member. Can be prevented from contacting.

  Preferably, the connection wire pressing structure further includes a terminal block to which the stator terminal is fixed. The pressing member is attached to the terminal block. According to the pressing structure of the connection line configured as described above, it is possible to more reliably prevent the stator terminal and the connection line from coming into contact with each other with a simple configuration.

  Preferably, the connection line pressing structure further includes a connector to which the connection line is connected. The connection line has a length that can contact the stator terminal in a state of being connected to the connector. By being pressed by the pressing member, the connection line changes from a state where it can contact the stator terminal to a state where it does not contact. According to the pressing structure of the connection line configured as described above, the connection line and the connector are connected by providing a margin in the length of the connection line while preventing contact between the stator terminal and the connection line. The workability at the time can be improved.

  Preferably, the connection wire pressing structure further includes a terminal block to which the stator terminal is fixed. A plurality of stator terminals are fixed to the terminal block at intervals. According to the pressing structure of the connection line configured as described above, the connection line can be prevented from coming into contact with the stator terminal so as to cross between the plurality of stator terminals. Thereby, the short circuit between several stator terminals can be prevented.

  Preferably, the connection line pressing structure further includes a connector disposed adjacent to the terminal block and connected to the connection line. The pressing member is attached to the terminal block so as to straddle only the stator terminal located closest to the connector among the plurality of stator terminals. According to the pressing structure of the connection line configured as described above, it is possible to more reliably prevent contact between the connection terminal and the stator terminal having the highest possibility of contact with the connection line. Moreover, compared with the case where a pressing member is provided so as to straddle all of the plurality of stator terminals, the motor can be downsized and the manufacturing cost can be reduced.

  Preferably, the pressing member is made of a resin material. At least a part of the pressing member is interposed between the plurality of stator terminals. According to the pressing structure of the connecting line configured as described above, the insulating property between the plurality of stator terminals is ensured by the pressing member. For this reason, the distance between the terminals can be set shorter to reduce the size of the motor.

  Preferably, the pressing member is attached while being inserted in a predetermined direction. The pressing member has a tapered portion in which an end extending in a direction inclined with respect to a predetermined direction is formed. When the pressing member is inserted, the tapered portion contacts the connection line and gradually pushes the connection line away from the stator terminal. Preferably, the connection wire pressing structure further includes a terminal block to which the stator terminal is fixed. The pressing member is attached to the terminal block so as to straddle the stator terminal. The pressing member pushes the connection line in a direction away from the stator terminal by sliding and moving while straddling the stator terminal.

  According to the pressing structure of the connecting line configured as described above, the pressing member and the connecting line are prevented from being caught when the pressing member is attached, and the connecting line can be pressed smoothly.

  Preferably, the connection line pressing structure further includes a connector to which the connection line is connected, and a case body that accommodates the stator terminal and the connection line. The case body is formed with a through hole into which the connector is fitted. The connector is detachably attached to the through hole from the outside of the case body. The connection line has a length that is drawn to the outside of the case body through the through-hole in a state where the electric device is disposed in the vicinity of the motor.

  According to the pressing structure of the connection line configured as described above, when connecting the connection line to the connector, the connection line drawn out from the through hole and the connector can be connected outside the case body. . On the other hand, when trying to reduce the size of the motor, the distance between the stator terminal accommodated in the case body and the connection line is also reduced. For this reason, if the connection line has a length for pulling out to the outside of the case body, a new problem that the stator terminal and the connection line come into contact with each other arises. In the present invention, such a problem is solved by providing a pressing member, and it is possible to simultaneously reduce the size of the motor and improve the workability when connecting the connecting wire to the connector.

  As described above, according to the present invention, it is possible to provide a connection line pressing structure that reliably prevents contact between the stator terminal and the connection line even when the motor is downsized.

  Embodiments of the present invention will be described with reference to the drawings. In the drawings referred to below, the same or corresponding members are denoted by the same reference numerals.

(Embodiment 1)
1 is a plan view showing a transaxle to which a connection wire pressing structure according to Embodiment 1 of the present invention is applied. The transaxle shown in the figure is mounted on a hybrid vehicle that uses an internal combustion engine such as a gasoline engine or a diesel engine and a motor supplied with power from a chargeable / dischargeable secondary battery (battery) as a power source.

  Referring to FIG. 1, transaxle 10 includes a motor generator 12 and a motor case 13 that houses motor generator 12.

  The motor generator 12 is electrically connected to an inverter (not shown). The inverter converts a direct current from the battery into an alternating current for driving the motor, or converts an alternating current generated by the motor generator 12 by the regenerative brake into a direct current for charging the battery. For example, the transaxle 10 is installed in an engine room of a hybrid vehicle together with an inverter.

  The motor case 13 forms an outer shell of the transaxle 10. That is, the size of the transaxle 10 can be reduced by designing the motor case 13 as small as possible. The motor case 13 forms an internal space 14 at a position adjacent to the motor generator 12. A terminal block 21 is disposed in the internal space 14. The motor case 13 is formed with a through hole 15 penetrating from the internal space 14 to the outside thereof. A lid (not shown) is attached to the motor case 13 so as to close the opening 18 of the internal space 14.

  In the internal space 14, a U-phase cable 34, a V-phase cable 35, and a W-phase cable 36 that extend between the stator constituting the motor generator 12 and the terminal block 21 are routed. The U-phase cable 34, the V-phase cable 35, and the W-phase cable 36 are electrically connected between the motor generator 12 and an inverter (not shown), and a high-voltage current of about 650 V, for example, flows. When the vehicle is started, a voltage of 1000 V or more is applied to the U-phase cable 34, the V-phase cable 35, and the W-phase cable 36.

  Stator terminals 31, 32, and 33 are provided at the ends of the U-phase cable 34, the V-phase cable 35, and the W-phase cable 36 that extend from the stator, respectively. The stator terminals 31, 32, and 33 are fixed to the terminal block 21 at a distance from each other. The U-phase cable 34, the V-phase cable 35, and the W-phase cable 36 are covered with, for example, an insulating glass varnish tube. The distance between the stator terminals is set to, for example, 8 mm or more in order to ensure mutual insulation.

  The stator that constitutes the motor generator 12 is wound with a coil composed of a U-phase coil, a V-phase coil, and a W-phase coil. A U-phase cable 34, a V-phase cable 35, and a W-phase cable 36 are provided corresponding to these coils. Stator terminals 31, 32, and 33 are provided to connect the U-phase cable 34, V-phase cable 35, and W-phase cable 36 to the terminal block 21. A three-phase cable electrically connected to the U-phase cable 34, the V-phase cable 35, and the W-phase cable 36 extends between the terminal block 21 and an inverter (not shown). The terminal block 21 relays between the three-phase cable and the U-phase cable 34, the V-phase cable 35, and the W-phase cable 36.

  A connector 53 is fitted into the through hole 15 from the outside of the internal space 14. The connector 53 is detachably provided from the outside of the internal space 14. The connector 53 is disposed at a position closest to the stator terminal 31 among the stator terminals 31, 32 and 33.

  A thermistor that is a temperature detection element is connected to the stator that constitutes the motor generator 12. A lead wire 51 extending from the thermistor is routed in the internal space 14. A thermistor connector 52 is provided at the tip of the lead wire 51 extending from the thermistor. The thermistor connector 52 is connected to the connector 53. The lead wire 51 is routed so as to cross the front of the stator terminal 31. Lead wire 51 is routed so as to cross U-phase cable 34.

  The motor 12 has an outer peripheral surface 12a. The outer peripheral surface 12 a extends in a cylindrical shape in the direction of the rotation axis of the rotor constituting the motor generator 12. When viewed from the direction of the rotation axis of the rotor constituting the motor generator 12, the terminal block 21 and the thermistor connector 52 are arranged on the outer periphery of the outer peripheral surface 12a. The terminal block 21 and the thermistor connector 52 are arranged side by side in the circumferential direction of the outer peripheral surface 12 a at a position spaced from the motor 12. The terminal block 21 faces the outer peripheral surface 12a at a distance. The through hole 15 is formed at a position shifted from the space between the outer peripheral surface 12 a and the terminal block 21 facing each other. The through hole 15 penetrates along a straight line substantially orthogonal to a straight line extending from the outer peripheral surface 12 a toward the terminal block 21. The direction through which the through hole 15 passes and the axial direction of the lead wire 51 extending from the thermistor connector 52 in a state where the connection wire guide 41 described later is not provided substantially coincide with each other. The lead wire 51 extends from the thermistor connector 52 to the space between the motor 12 and the terminal block 21.

  The lead wire 51 has a length that can contact at least the stator terminal 31 with the thermistor connector 52 connected to the connector 53. The lead wire 51 may further have a length that can contact the stator terminals 32 and 33. The lead wire 51 has a length enough to be pulled out by, for example, 100 mm or more to the outside of the internal space 14 through the through hole 15.

  In the internal space 14, a connection wire guide 41 is further provided that presses the lead wire 51 in a direction away from the stator terminal 31. The connection line guide 41 is attached to the terminal block 21. The connection line guide 41 is provided in a form straddling the stator terminal 31.

  FIG. 2 is a perspective view showing the connection line guide in FIG. FIG. 3 is a cross-sectional view of the terminal block along the line III-III in FIG. FIG. 4 is a cross-sectional view of the terminal block along the line IV-IV in FIG.

  Referring to FIGS. 2 to 4, connection line guide 41 is made of an insulating material. The connecting wire guide 41 is made of a resin material such as polyamide (PA) or silicone resin.

  The connection line guide 41 includes a base portion 46 provided at a position spaced from the stator terminal 31, branch portions 47 and 48 branched from the base portion 46 and spaced apart from each other, and branch portions 47 and 48 from the base portion 46. It is comprised including the holding part 42 which protrudes on the opposite side. The stator terminal 31 is disposed in a space surrounded by the branch portions 47 and 48 and the base portion 46.

  The branch portion 47 is formed with a key-like portion 45 that protrudes toward the branch portion 48. An inclined portion 44 is formed in the branch portion 47 so as to face the lead wire 51. The inclined portion 44 is positioned between the connector 53 and the stator terminal 31. The grip portion 42 includes an end face 43 that faces the lid body 19 at a distance.

  The terminal block 21 has an insertion part 22 including an end face 23. The end surface 23 faces the lid body 19. The insertion portion 22 is formed between the stator terminal 31 and the stator terminal 32. A groove 25 that opens to the end surface 23 is formed in the insertion portion 22. A branch portion 48 is fitted into the groove 25 from the end face 23 side. The terminal block 21 has a groove 24 in which the key-like portion 45 is locked. With such a configuration, when attaching to the terminal block 21, the connecting wire guide 41 is inserted from the opening 18 toward the terminal block 21 so that the branch portion 48 is fitted in the groove 25. The inclined portion 44 is formed to be inclined with respect to the insertion direction.

  The lead wire 51 contacts the inclined portion 44 and is pressed in a direction away from the stator terminal 31. Thereby, the lead wire 51 is held at a position away from the stator terminal 31. The inclined portion 44 is provided in the connecting wire guide 41 as a contact portion that contacts the lead wire 51.

  When the axial line position of the lead wire 51 extending from the thermistor connector 52 in FIG. 1 is on the central shaft 101, the lead wire 51 is pressed against the inclined portion 44, whereby the stator terminal 31 and the central shaft 101 are It is preferable to be positioned between. With such a configuration, it is possible to reliably hold the lead wire 51 at a position away from the stator terminal 31 and to prevent an excessive force from being applied to the lead wire 51 pressed against the inclined portion 44.

  When the distance between the end surface 23 of the insertion portion 22 and the lower end of the branch portion 48 is L1, and the distance between the end surface 43 of the grip portion 42 and the lid 19 is L2, the relationship of L2 <L1 is satisfied. . That is, the terminal block 21 is formed with a groove 25 that opens to face the lid 19 and into which the connection line guide 41 is inserted from the lid 19 side. The length at which the connecting line guide 41 is inserted into the groove 25, that is, L1 is larger than the distance between the lid 19 and the connecting line guide 41, that is, L2.

  With such a configuration, the allowance of the connecting line guide 41 with respect to the groove 25 can be set larger than the gap between the connecting line guide 41 and the lid body 19. Thereby, even if the lock | rock of the key-shaped part 45 with respect to the groove | channel 24 may be released, it can prevent that the connecting wire guide 41 remove | deviates from the terminal block 21. FIG.

  In the present embodiment, the branch portion 48 is positioned between the stator terminal 31 and the stator terminal 32. For this reason, it becomes possible to set the distance between both terminals short, ensuring the insulation between the stator terminal 31 and the stator terminal 32. Thereby, size reduction of the transaxle 10 can be achieved. With such a configuration, the distance between the stator terminal 31 and the stator terminal 32 may be smaller than the distance between the stator terminal 32 and the stator terminal 33.

  5 to 7 are diagrams showing a process of connecting the connection line in FIG. 1 to the connector. 5 and 6 show a partial range of the plan view in FIG. 7 shows the same cross-sectional position as in FIG.

  With reference to FIG. 5, first, the lead wire 51 is pulled out from the through hole 15 to the outside of the internal space 14. The thermistor connector 52 of the lead wire 51 drawn out is connected to the connector 53 outside the internal space 14. Referring to FIG. 6, connector 53 is fitted into through hole 15. At this time, in the internal space 14, the lead wire 51 and the stator terminal 31 or the plurality of stator terminals can come into contact with each other.

  With reference to FIG. 7, the connection line guide 41 is inserted from the opening 18 toward the terminal block 21 while grasping the grip 42. At this time, the inclined portion 44 pushes the lead wire 51 gradually away from the stator terminal 31.

  By such a process, the lead wire 51 can be easily connected as compared with the case where the thermistor connector 52 is connected to the connector 53 in the internal space 14. Further, by providing the inclined portion 44, it is possible to prevent the connection line guide 41 and the lead wire 51 from being caught when the connection line guide 41 is attached to the terminal block 21. Thereby, workability | operativity at the time of attachment of the connecting wire guide 41 can be improved. Further, it is possible to prevent an excessive force from being applied to the lead wire 51 during the attachment.

  The connection line pressing structure according to the first embodiment of the present invention is arranged in the vicinity of a motor generator 12 as a motor having a stator, a stator terminal 31 provided in a U-phase cable 34 as a wiring extending from the stator, and the motor. A lead wire 51 extending from a thermistor as an electric device, and a connecting wire guide 41 as a pressing member for pressing the lead wire 51 and holding the lead wire 51 at a position separated from the stator terminal 31. The thermistor is provided as an electrical device that detects the state of the motor.

  According to the connection wire pressing structure in Embodiment 1 of the present invention configured as described above, contact between the stator terminal 31 and the lead wire 51 or contact between the plurality of stator terminals and the lead wire 51 is avoided. And it can prevent that a short circuit generate | occur | produces between both.

  If the size of the transaxle 10 is to be reduced, the distance between the stator terminal 31 accommodated in the motor case 13 and the lead wire 51 becomes small, and there is a possibility that both will contact. In order to avoid this, the length of the lead wire 51 may be set short. However, in the present embodiment, since it is necessary to pull out the lead wire 51 to the outside of the internal space 14 during the process of connecting the thermistor connector 52 to the connector 53, the length of the lead wire 51 is set to the distance between the stator and the connector 53. Must be set to a greater length. Therefore, the problem of contact between the lead wire 51 and the stator terminal 31 is a problem that occurs for the first time when both improvement in workability when the thermistor is attached and miniaturization of the transaxle 10 are taken into consideration.

  In the present embodiment, the connection line guide 41 is provided so as to straddle only the stator terminal 31, but the connection line guide 41 may be provided so as to straddle a plurality of stator terminals. Moreover, the U-phase cable 34, the V-phase cable 35, and the W-phase cable 36 may be interchanged.

(Embodiment 2)
FIG. 8 is a cross-sectional view showing a connection line pressing structure according to Embodiment 2 of the present invention. FIG. 8 is a diagram corresponding to FIG. 7 in the first embodiment. The connection line pressing structure in the present embodiment is basically the same as that of the connection line pressing structure in the first embodiment. Hereinafter, the description of the overlapping structure will not be repeated.

  Referring to FIG. 8, in the present embodiment, connecting portion guide 41 is not formed with inclined portion 44 in FIG. The connecting wire guide 41 is provided so as to be slidable in a direction away from the stator terminal 31 while straddling the stator terminal 31. An end side 49 is formed at the branching portion 47 so as to face the lead wire 51. The end side 49 is provided in the connecting wire guide 41 as a contact portion that contacts the lead wire 51.

  The attachment method of the connection line guide 41 in FIG. 8 will be described. First, the connection line guide 41 is inserted from the opening 18 toward the terminal block 21. At this time, the connecting wire guide 41 is inserted at a position where the connecting wire guide 41 and the lead wire 51 do not contact each other. In a state where the stator terminal 31 is straddled, the connecting wire guide 41 is slid in a direction away from the stator terminal 31. At this time, the end side 49 pushes the lead wire 51 away from the stator terminal 31.

  With such a configuration, when the connection wire guide 41 is attached to the terminal block 21, it is possible to prevent the connection wire guide 41 and the lead wire 51 from being caught, and to prevent an excessive force from being applied to the lead wire 51. .

  According to the connection line pressing structure according to the second embodiment of the present invention configured as described above, the same effects as those described in the first embodiment can be obtained.

  The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

It is a top view which shows the transaxle to which the pressing structure of the connection line in Embodiment 1 of this invention was applied. It is a perspective view which shows the connecting wire guide in FIG. It is sectional drawing of the terminal block along the III-III line in FIG. It is sectional drawing of the terminal block along the IV-IV line in FIG. It is a figure which shows the 1st process of the operation | work which connects the connection line in FIG. 1 to a connector. It is a figure which shows the 2nd process of the operation | work which connects the connection line in FIG. 1 to a connector. It is a figure which shows the 3rd process of the operation | work which connects the connection line in FIG. 1 to a connector. It is sectional drawing which shows the pressing structure of the connection line in Embodiment 2 of this invention.

Explanation of symbols

  10 Transaxle, 12 Motor generator, 13 Motor case, 15 Through hole, 21 Terminal block, 31, 32, 33 Stator terminal, 34 U phase cable, 35 V phase cable, 36 W phase cable, 41 Connection line guide, 44 Inclination Part, 51 lead wire, 53 connector.

Claims (5)

A motor having a stator;
A stator terminal provided on a wiring extending from the stator;
A connection line extending from an electric device disposed in the vicinity of the motor;
Holding down the connection line and holding the connection line at a position spaced from the stator terminal ; and
A terminal block to which the stator terminal is fixed,
The pressing member is attached to the terminal block while being inserted in a predetermined direction,
The pressing member has a tapered portion formed with an end extending in a direction inclined with respect to the predetermined direction,
The tapered portion is in contact with the connection line when the pressing member is inserted, and gradually pushes the connection line away from the stator terminal.
A connector to which the connection line is connected;
A case body for accommodating the stator terminal and the connection line;
The case body is formed with a through-hole into which the connector is fitted, and the connector is detachably provided from the outside of the case body with respect to the through-hole,
The connection line pressing structure, wherein the connection line has a length that is pulled out to the outside of the case body through the through-hole in a state where the electric device is disposed in the vicinity of the motor . Before SL connecting line is in a state of being connected to the connector, it has a length capable of contacting the stator terminals,
By being pressed by the pressing member, wherein the connection line is changed to a state where no contact from a state capable of contacting the stator terminals, the pressing of the connecting line according to claim 1 structure. The stator terminals of the multiple is fixed to the terminal block at a distance from one another, pressing the connection wire according to claim 1 or 2 structure. The connector is disposed adjacent to the terminal block,
The connection wire pressing structure according to claim 3 , wherein the pressing member is attached to the terminal block so as to straddle only the stator terminal located closest to the connector among the plurality of stator terminals. . The pressing member is formed of a resin material,
The connection line pressing structure according to claim 3 or 4 , wherein at least a part of the pressing member is interposed between the plurality of stator terminals.

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