JP5425029B2 - Semiconductor cooling device and vehicle drive device - Google Patents

Description

  The present invention includes a cooler having therein a cooling chamber through which a coolant for cooling a semiconductor element flows, a tubular member forming a flow path communicating with the cooling chamber, and at least a semiconductor element, a cooler, and a tubular member The present invention relates to a semiconductor cooling device including a cover member to be accommodated, and a vehicle drive device including such a semiconductor cooling device.

  2. Description of the Related Art Conventionally, a vehicle drive device including a rotating electrical machine that functions as a driving force source for a vehicle and a control device that controls the rotating electrical machine has been used. For example, the device described in Patent Document 1 below is configured as a drive device (hybrid drive device) for driving a hybrid vehicle including both an internal combustion engine and a rotating electrical machine as a drive force source. Here, the control device for controlling the rotating electrical machine includes, for example, a semiconductor element such as a switching element constituting an inverter circuit. Since such semiconductor elements such as switching elements generate heat with the operation of the control device, a semiconductor cooling device for cooling the semiconductor elements is provided.

  In the hybrid drive device of Patent Document 1, a cooling chamber through which a coolant for cooling the semiconductor element flows is formed between the drive device case and the case frame that supports the control device. That is, the semiconductor cooling device is formed using the space between the drive device case and the case frame of the control device. However, when such a configuration is adopted, since the sealing performance around the cooling chamber can be confirmed only after the assembly of the drive device case and the case frame is completed, the manufacturing process may be complicated.

  In view of the above concerns, for example, it may be possible to employ a configuration in which a cooler having a cooling chamber alone is provided outside the drive device case together with a control device in order to facilitate the guarantee of sealing performance. In this case, in consideration of convenience (manufacturability) when attaching a cover member that accommodates a control device or the like to the drive device case along a predetermined direction when the hybrid drive device is manufactured, cooling in the cooler is performed. The end of the tubular member forming the connecting portion between the chamber and the coolant circulation circuit on the coolant circulation circuit side is preferably disposed at a position within the cover member. In this case, as shown in FIG. 11, an opening 102 is provided at a predetermined position of the cover member 101, and the hose member 103 that penetrates the opening 102 in a state of being liquid-tight with the opening 102. A configuration in which the coolant circulation circuit 104 and the tubular member 105 are connected via the hose member 103 is conceivable.

  However, in such a configuration, since the end portion of the tubular member 105 is disposed inside the cover member 101, when the hose member 103 is removed from the tubular member 105, the tubular member 105 is stored inside the cooler and the tubular member 105. The coolant that has been spilled from the tip 35 a of the tubular member 35 leaks into the cover member 101. If the coolant leaks into the cover member 101, there is a possibility that an electronic component such as a semiconductor element provided in the control device will be adversely affected.

JP 2009-201257 A

  Therefore, it is possible to guarantee the sealing performance alone, to ensure the ease of manufacture, and also to release the connection between the tubular member and the coolant circulation circuit through which the coolant circulates on the inner side of the cover member. Realization of a semiconductor cooling device that can prevent the leakage of coolant is desired.

  According to the present invention, a cooler having therein a cooling chamber in which a coolant for cooling the semiconductor element flows, a tubular member forming a flow path communicating with the cooling chamber, at least the semiconductor element, the cooler, And a cover member that accommodates the tubular member, the characteristic configuration of the semiconductor cooling device includes a predetermined surface of the cover member as an opening forming surface, the opening forming surface being provided with an opening, and the opening An end of the tubular member opposite to the side connected to the cooling chamber. The tip part which is a part is arranged in the concave space, and both the concave space forming member and the cover member and between the concave space forming member and the tubular member are liquid-tight. There is in point.

According to said characteristic structure, since the cooler which has a cooling chamber in the inside is accommodated and provided in a cover member, the guarantee of the sealing performance in the periphery of a cooling chamber by a semiconductor cooling device alone is possible.
At this time, since the distal end portion of the tubular member opposite to the side connected to the cooling chamber is disposed in the concave space finally formed by the concave space forming member, the concave space is formed in the opening of the cover member. In a state before attaching the forming member, the cover member can be covered with the semiconductor element, the cooler, and the tubular member along a predetermined direction without interfering with the tubular member to be accommodated. Therefore, the ease of manufacture can be ensured.
Further, by attaching a concave space forming member to the opening of the cover member thereafter, the distal end portion of the tubular member is disposed in the concave space, and the distal end portion of the tubular member is integrated in a liquid-tight state and the concave portion. It can expose to these exterior sides with respect to a space formation member. Thus, when the connection between the tubular member and the coolant circulation circuit is released, the coolant that spills from the tip of the tubular member is integrated with the cover member and the concave space forming member that are integrated in a liquid-tight state. Can be discharged. Therefore, it is possible to prevent the coolant from leaking inside the cover member.
Therefore, according to the above-described characteristic configuration, the sealing performance alone can be ensured, the ease of manufacturing is ensured, and the connection between the tubular member and the coolant circulation circuit through which the coolant circulates is released. In addition, it is possible to provide a semiconductor cooling device that can prevent leakage of the coolant on the inner side of the cover member.

  Here, it is preferable that the attaching / detaching direction of the cover member is a direction intersecting with the extending direction of the tubular member.

  For example, when the tip of the tubular member opposite to the side connected to the cooling chamber is exposed to the outside of the cover member, it is possible to reliably prevent coolant leakage on the inside of the cover member. it can. However, in this case, since the tubular member and the cover member interfere with each other, it may be difficult to attach and detach the cover member along the direction intersecting the extending direction of the tubular member. In this regard, according to the present invention, since the distal end portion of the tubular member is finally disposed in the concave space and disposed on the inner side of the cover member, the cover is provided along the direction intersecting the extending direction of the tubular member. Even when the member is attached and detached, the tip of the tubular member and the cover member do not interfere with each other. Therefore, even in such a case, the cover member can be appropriately attached and detached. Therefore, as a configuration to which the present invention can be applied, a configuration in which the attaching / detaching direction of the cover member intersects with the extending direction of the tubular member as described above is particularly suitable.

  In addition, it is preferable that the opening is provided on an extension line of the tip along the extending direction of the tubular member.

  According to this configuration, the distal end portion of the tubular member is appropriately arranged in the concave space by inserting the concave space forming member into the inner side of the cover member along the extending direction of the tubular member from the opening of the cover member. can do. Moreover, it is easy to make a liquid-tight state between the concave space forming member and the tubular member.

  Further, the concave space forming member has a substantially cylindrical cylindrical portion and a hook-like portion extending radially outward from an axial end portion of the cylindrical portion, and between the hook-like portion and the cover member. It is preferable to further include a fixing mechanism that restricts the relative movement and fixes them together.

  According to this configuration, the concave space forming member can be appropriately fixed to the cover member in a state in which the hook-shaped portion is fixed to be in contact with the cover member by the fixing mechanism, and at the radially inner side of the cylindrical portion. A concave space can be formed appropriately. In addition, it is easy to make a liquid-tight state between the bowl-shaped portion and the cover member, which are often formed in a flat plate shape, respectively, and a liquid is formed between the tubular member and the cylindrical portion formed in a cylindrical shape, respectively. It is easy to make it dense. Therefore, it is possible to easily realize a configuration in which both the concave space forming member and the cover member and between the concave space forming member and the tubular member are in a liquid-tight state.

  Further, it is preferable that the fixing mechanism has a locking claw portion provided on an outer peripheral surface of the cylindrical portion so as to sandwich the cover member between the fixing portion and the hook-shaped portion.

  According to this structure, the concave claw forming member and the cover member can be appropriately fixed with a simple structure by the locking claw portion. In this configuration, the concave space forming member and the cover member can be fixed by simply inserting the concave space forming member having the locking claw portion into the opening of the cover member. Therefore, the manufacturing process can be simplified.

  In addition, the cover member has a cylindrical folded portion formed around the opening portion by being folded back on the inner side of the cover member with respect to the opening forming surface, and the fixing mechanism includes the folding portion. It is preferable to have a structure having a threaded portion provided between the inner peripheral surface and the outer peripheral surface of the cylindrical portion.

  According to this configuration, the recessed space forming member and the cover member can be reliably fixed by the screwing portion. Further, in this configuration, the recessed space forming member and the cover member can be freely fixed and released by the screwing portion.

  A cylindrical connecting member connected to the distal end of the tubular member in the concave space, wherein the fixing mechanism is a first fixing mechanism, and between the concave space forming member and the connecting member; It is preferable to further include a second fixing mechanism that restricts the relative movement of the two and fixes them together.

  According to this configuration, the connection between the tubular member and the coolant circulation circuit can be performed via the connecting member connected to the distal end portion of the tubular member in the recessed space. Therefore, for example, by connecting the connecting member and the coolant circulation circuit outside the cover member and outside the concave space, the spatial restriction in the concave space is eliminated and the connection is made. Work can be facilitated. Moreover, the concave space forming member and the connecting member can be appropriately fixed by the second fixing mechanism.

  Further, the second fixing mechanism is provided on any one of the inner peripheral surface of the cylindrical portion and the outer peripheral surface of the connecting member, and a protruding portion that projects radially toward the other, and the cylindrical portion It is preferable to have a locking claw portion that is provided on either the inner peripheral surface or the outer peripheral surface of the connecting member and engages with the protrusion.

  According to this configuration, the concave space forming member and the connecting member can be appropriately fixed with a simple configuration by the cooperation of the protruding portion and the locking claw portion. Further, in this configuration, the concave space forming member and the connecting member can be fixed simply by inserting the connecting member having either one of the locking claw portion and the protruding portion into the cylindrical portion of the concave space forming member. . Therefore, the manufacturing process can be simplified.

  A cylindrical connecting member connected to the tip of the tubular member in the concave space, wherein the fixing mechanism is provided between an inner peripheral surface of the concave space forming member and an outer peripheral surface of the connecting member; And a radially extending portion provided on the outer peripheral surface of the coupling member so as to extend radially outward on the outer side of the cover member with respect to the opening forming surface. It is preferable that the cover member is sandwiched between the radially extending portion and the flange-like portion by fastening the screwing portion so that they are integrally fixed.

  According to this configuration, the connection between the tubular member and the coolant circulation circuit can be performed via the connecting member connected to the distal end portion of the tubular member in the recessed space. Therefore, for example, by connecting the connecting member and the coolant circulation circuit outside the cover member and outside the concave space, the spatial restriction in the concave space is eliminated and the connection is made. Work can be facilitated. In addition, the cover member, the recessed space forming member, and the connecting member are securely fixed integrally by sandwiching the cover member between the radially extending portion and the bowl-shaped portion as the screwing portion is tightened. can do.

  Further, the semiconductor elements are arranged on the same plane facing the cooling chamber, and the flow direction of the cooling liquid and the extending direction of the tubular member are set along the extending direction of the plane. It is preferable to adopt a configuration.

  According to this configuration, the flow direction of the coolant and the extending direction of the tubular member are both set to extend along the extending direction of the plane on which the semiconductor element is disposed, and these are aligned with each other. The semiconductor element can be efficiently cooled in a state where there is little pressure loss of the cooling liquid.

  The vehicle driving device according to the present invention includes a semiconductor cooling device described so far, a rotating electrical machine that functions as a driving force source for the vehicle, and a control device that controls the rotating electrical machine, and the semiconductor The element is a switching element that constitutes an inverter circuit included in the control device, and the semiconductor cooling device and the control device are integrally fixed to a drive device case that houses the rotating electrical machine. .

  In the present application, the “rotary electric machine” is used as a concept including any of a motor (electric motor), a generator (generator), and a motor / generator functioning as both a motor and a generator as necessary.

  According to this characteristic configuration, since the semiconductor cooling device and the control device are integrally fixed to the drive device case that houses the rotating electrical machine, the vehicle drive device including the control device can be mounted on the vehicle. improves. Moreover, the switching element which comprises the inverter circuit contained in a control apparatus can be appropriately cooled with the cooling fluid which distribute | circulates a cooling chamber. At that time, by using the semiconductor cooling device as described so far, it becomes possible to guarantee the sealing performance and to ensure the ease of manufacture. Further, when the connection between the tubular member and the coolant circulation circuit in which the coolant circulates is released at the time of service such as repair of the control device, leakage of the coolant on the inner side of the cover member can be prevented.

It is a side view of the hybrid drive device concerning a first embodiment. It is a schematic diagram which shows the circuit structure of the control apparatus which concerns on 1st embodiment. It is sectional drawing of the control apparatus which concerns on 1st embodiment. It is a disassembled perspective view of the control apparatus which concerns on 1st embodiment. It is a fragmentary sectional view which shows the connection structure of the semiconductor cooling device which concerns on 1st embodiment, and a coolant circulation circuit. It is a perspective view which shows the connection structure of the semiconductor cooling device which concerns on 1st embodiment, and a coolant circulation circuit. It is a fragmentary sectional view which shows the connection structure of the semiconductor cooling device which concerns on 2nd embodiment, and a coolant circulation circuit. It is a fragmentary sectional view which shows the connection structure of the semiconductor cooling device which concerns on 3rd embodiment, and a coolant circulation circuit. It is a fragmentary sectional view which shows the connection structure of the semiconductor cooling device which concerns on 4th embodiment, and a coolant circulation circuit. It is a fragmentary sectional view showing a connection structure of a semiconductor cooling device and a cooling fluid circulation circuit concerning other embodiments. It is a fragmentary sectional view which shows the connection structure of the conductor cooling device and cooling fluid circulation circuit which concern on a prior art.

1. First Embodiment A first embodiment of a semiconductor cooling device according to the present invention will be described with reference to the drawings. In the present embodiment, the case where the semiconductor cooling device according to the present invention is used for cooling the switching elements E1 to E14 (see FIG. 2) included in the control device 10 provided in the hybrid drive device H will be described as an example. To do. Here, the hybrid drive device H is a drive device for a hybrid vehicle provided with both the internal combustion engine and the rotating electrical machines MG1 and MG2 as a drive force source of the vehicle. In the present embodiment, the hybrid drive device H corresponds to the “vehicle drive device” in the present invention.

1-1. Configuration of Hybrid Drive Device First, the configuration of the hybrid drive device H will be briefly described. As shown in FIG. 1, the hybrid drive device H according to the present embodiment includes two rotary electric machines MG1 and MG2 that function as a drive power source of a vehicle together with an internal combustion engine, as a drive device case 2 (hereinafter simply referred to as “case 2”). It is housed in the interior of the device. The hybrid drive device H is configured as a so-called two-motor split type hybrid drive device, and includes an input shaft that is drivingly connected to the internal combustion engine, a first rotating electrical machine MG1, a second rotating electrical machine MG2, and a power distribution device. And a counter gear mechanism C and an output differential gear device DF. In FIG. 1, only the outer shapes of the first rotating electrical machine MG1, the second rotating electrical machine MG2, the counter gear mechanism C, and the output differential gear device DF are indicated by two-dot chain lines.

  As shown in FIG. 1, the case 2 includes at least an outer peripheral wall portion 3 a that covers the outer periphery in the radial direction of the first rotating electric machine MG <b> 1 and the second rotating electric machine MG <b> 2 and end portions on both axial sides of the outer peripheral wall portion 3 a. An end wall portion 3b that extends at least in the radial direction and covers both axial sides of the first rotating electrical machine MG1 and the second rotating electrical machine MG2 is provided as the peripheral wall portion 3. In FIG. 1, only the wall on one side (the back side in the drawing) in the axial direction of the rotating electrical machines MG1 and MG2 is shown as the end wall portion 3b. The outer peripheral wall portion 3a is a modified cylinder so as to cover the first rotary electric machine MG1, the second rotary electric machine MG2 and the output differential gear device DF, which are arranged adjacent to each other in the radial direction, along the outer peripheral surface of the output differential gear device DF. It is formed in a shape. The case 2 is formed using a metal material such as aluminum. Moreover, in this embodiment, the outer peripheral wall part 3a which comprises the peripheral wall part 3 penetrates a part of the said outer peripheral wall part 3a, and the case opening part 4 (FIG. 4) opens so that the inside and outside of the case 2 may be connected. For example). A reactor 14 constituting a part of the control device 10 is disposed in the case 2 while being inserted through the case opening 4.

  Although illustration of the configuration of the drive transmission system is omitted, various known configurations can be employed. In this example, the input shaft is drivingly connected to the internal combustion engine and is also drivingly connected to the power distribution device. In this example, the power distribution device is composed of a single-pinion type planetary gear mechanism having three rotating elements: a sun gear, a carrier, and a ring gear. It is connected. The power distribution device distributes the driving force of the internal combustion engine (here, “driving force” is used synonymously with “torque”) to the first rotating electrical machine MG1 and the output gear that is drivingly connected to the ring gear. The torque distributed to the output gear and the torque of the second rotating electrical machine MG2 are transmitted to the wheels via the counter gear mechanism C and the output differential gear device DF.

  Here, each of the first rotating electrical machine MG1 and the second rotating electrical machine MG2 includes a stator fixed to the case 2 and a rotor that is rotatably supported on the radially inner side of the stator. The first rotating electrical machine MG1 and the second rotating electrical machine MG2 are each electrically connected to a battery B (see FIG. 2) as a power storage device. Battery B is an example of a power storage device, and other power storage devices such as capacitors can be used, or a plurality of types of power storage devices can be used in combination. Further, the battery B can be configured to be rechargeable by an external power source such as a household power source.

  Each of the first rotating electrical machine MG1 and the second rotating electrical machine MG2 functions as a motor (electric motor) that generates power by receiving power supply, and a generator (generator) that generates power by receiving power supply. It is possible to fulfill the function. Here, when the first rotating electrical machine MG1 and the second rotating electrical machine MG2 function as generators, the first rotating electrical machine MG1 and the second rotating electrical machine MG2 generate power using the torque of the internal combustion engine or the inertial force of the vehicle, and charge the battery B or Electric power for driving the rotating electrical machines MG1, MG2 is supplied. On the other hand, when the first rotating electrical machine MG1 and the second rotating electrical machine MG2 function as motors, supply of power charged in the battery B or power generated by the other rotating electrical machines MG1 and MG2 functioning as generators. In response to power. In the present embodiment, the first rotating electrical machine MG1 and the second rotating electrical machine MG2 are rotating electrical machines that are driven by three-phase (in this example, U phase, V phase, and W phase) alternating current. These rotary electric machines MG1 and MG2 are controlled by the control device 10.

1-2. Configuration of Electric Circuit of Control Device Next, the configuration of the electric circuit of the control device 10 that controls the rotary electric machines MG1 and MG2 will be described. As shown in FIG. 2, in the present embodiment, the control device 10 includes two inverter circuits 12 and 13 and one booster circuit 11 common to them. The booster circuit 11 boosts DC power (having the power supply voltage Vb) from the battery B. The first inverter circuit 12 converts the DC power boosted by the booster circuit 11 (having system voltage Vs (Vs> Vb)) into AC power and supplies it to the first rotating electrical machine MG1. The second inverter circuit 12 converts the system voltage Vs into AC power and supplies it to the second rotating electrical machine MG2.

  The booster circuit 11 includes a reactor 14 and a pair of upper and lower switching elements E1 and E2. Here, of the pair of upper and lower switching elements, the upper switching element is referred to as an “upper arm element” and the lower switching element is referred to as a “lower arm element” (hereinafter the same). The emitter of the upper arm element E1 is connected to the collector of the lower arm element E2, and is connected to the positive terminal of the battery B via the reactor 14. The collector of the upper arm element E1 is connected to the system power line Lh to which the power boosted by the booster circuit 11 is supplied, and the emitter of the lower arm element E2 is connected to the negative line Lg connected to the negative terminal of the battery B. . Free wheel diodes D1 and D2 are connected in parallel to the switching elements E1 and E2, respectively.

  Each of the switching elements E1 and E2 is turned on / off (switching operation) in accordance with a gate drive signal output from a power control unit (not shown). The booster circuit 11 boosts the power supply voltage Vb from the battery B to a desired system voltage Vs by the induced electromotive force of the reactor 14 generated by the on / off operation of the lower arm element E2. The first smoothing capacitor 15 is connected in parallel between the positive terminal and the negative terminal of the battery B, and the power supply voltage Vb from the battery B is smoothed and supplied to the booster circuit 11. A second smoothing capacitor 16 is connected in parallel between the system power line Lh and the negative electrode line Lg, and the system voltage Vs from the booster circuit 11 is smoothed and supplied to the two inverter circuits 12 and 13. . On the other hand, the booster circuit 11 steps down the DC power from the inverter circuits 12 and 13 by the induced electromotive force of the reactor 14 generated when the upper arm element E1 is turned on / off.

  The first inverter circuit 12 is configured by a bridge circuit and includes a plurality of switching elements E3 to E8. The first inverter circuit 12 includes a pair of upper and lower switching elements for each phase of the first rotating electrical machine MG1. Specifically, the upper arm element E3 and the lower arm element E4 for the U phase, and the upper phase for the V phase. The arm element E5 and the lower arm element E6, and the upper arm element E7 and the lower arm element E8 for the W phase are provided. The collectors of the upper arm elements E3, E5, E7 for each phase are connected to the system power line Lh, and the emitters of the lower arm elements E4, E6, E8 for each phase are connected to the negative electrode line Lg. Further, the emitters of the upper arm elements E3, E5, E7 for each phase and the collectors of the lower arm elements E4, E6, E8 for each phase are respectively connected to the coils of the respective phases of the first rotating electrical machine MG1. . Free wheel diodes D3 to D8 are connected in parallel to the switching elements E3 to E8, respectively.

  The second inverter circuit 13 is configured by a bridge circuit and includes a plurality of switching elements E9 to E14. The second inverter circuit 13 includes a pair of upper and lower switching elements for each phase of the second rotating electrical machine MG2. Specifically, the upper arm element E9 and the lower arm element E10 for the U phase, and the upper phase for the V phase. The arm element E11 and the lower arm element E12, and the upper arm element E13 and the lower arm element E14 for the W phase are provided. The collectors of the upper arm elements E9, E11, E13 for each phase are connected to the system power line Lh, and the emitters of the lower arm elements E10, E12, E14 for each phase are connected to the negative electrode line Lg. Further, the emitters of the upper arm elements E9, E11, E13 for the respective phases and the collectors of the lower arm elements E10, E12, E14 for the respective phases are respectively connected to the coils of the respective phases of the second rotating electrical machine MG2. . Further, free wheel diodes D9 to D14 are connected in parallel to the switching elements E9 to E14, respectively.

  In the present embodiment, an IGBT (insulated gate bipolar transistor) is used as each of the switching elements E1 to E14. However, the present invention is not limited to this, and other switching elements such as MOSFET (metal oxide semiconductor field effect transistor) may be used. In the present embodiment, each of the switching elements E1 to E14 corresponds to a “semiconductor element” in the present invention.

  Each of the switching elements E3 to E8 is turned on / off (switching operation) in accordance with a gate drive signal output from a power control unit (not shown). Accordingly, the first inverter circuit 12 converts the boosted DC power (having the system voltage Vs) into AC power, supplies the AC power to the first rotating electrical machine MG1, and causes the first rotating electrical machine MG1 to output a driving force. Similarly, each of the switching elements E9 to E14 is turned on / off (switching operation) in accordance with a gate drive signal output from a power control unit (not shown). As a result, the second inverter circuit 13 converts the boosted DC power (having the system voltage Vs) into AC power, supplies the AC power to the second rotating electrical machine MG2, and causes the second rotating electrical machine MG2 to output a driving force.

  The first inverter circuit 12 and the second inverter circuit 13 are configured such that when the first rotating electrical machine MG1 and the second rotating electrical machine MG2 function as generators, the respective switching elements are turned on and off according to the gate drive signal. Is converted into DC power and supplied to the booster circuit 11 via the system power line Lh. This DC power is stepped down by the booster circuit 11 and stored in the battery B.

  A first current sensor 25 is provided between the first inverter circuit 12 and the first rotating electrical machine MG1. The first current sensor 25 detects a current supplied to the first rotating electrical machine MG1. A second current sensor 26 is provided between the second inverter circuit 13 and the second rotating electrical machine MG2. The second current sensor 26 detects a current supplied to the second rotating electrical machine MG2. Note that this example shows a configuration that measures the current of all three phases. However, since the three phases are in an equilibrium state and the sum of instantaneous values is zero, the current of only two phases is measured, and the CPU or the like It is good also as a structure which calculates | requires the electric current of the remaining one phase by calculation using an arithmetic processing unit.

  In the present embodiment, as shown in FIGS. 1 and 3, the control device 10 is basically disposed inside a cover member 60 that is directly attached to the case 2 outside the case 2. That is, the control device 10 is basically disposed in a space between the case 2 and the cover member 60. However, in the present embodiment, the reactor 14 that constitutes a part of the control device 10 is separated from the other components of the control device 10 and arranged inside the case 2. The first rotating electrical machine MG1, the second rotating electrical machine MG2, and the reactor 14 disposed inside the case 2 and the control device 10 (excluding the reactor 14) disposed outside the case 2 have a common terminal block 40. They are electrically connected via connection members 57 to 59 held by (see FIG. 2 and FIG. 4 etc.). In FIG. 2, the terminal block 40 is conceptually indicated by a one-dot chain line.

1-3. Hardware Configuration of Control Device Next, the hardware configuration of the control device 10 will be described. In the present embodiment, the control device 10 (excluding the reactor 14) includes switching element modules 17 to 19 and a control board 38 as main components as shown in FIGS. These are housed inside the cover member 60. Further, the terminal block 40 and the cooler 32 are also accommodated inside the cover member 60. As shown in FIG. 3, the terminal block 40, the cooler 32, the switching element modules 17 to 19, and the control board 38 are stacked in this order from the side close to the case 2. Hereinafter, it demonstrates in order. In the following description, the direction in which these layers are stacked is referred to as a stacking direction L. Further, in the stacking direction L, the terminal block 40 side (lower side in FIG. 3) is the lower side, and the control board 38 side (FIG. 3). The upper side in FIG.

  The terminal block 40 is a member that holds at least a plurality of connection members 57 to 59. As shown in FIG. 4, in this embodiment, the terminal block 40 includes at least three flat plate-like first connection members 57, three flat plate-like second connection members 58, and two flat plate-like third connections. The member 59 is held. The three first connecting members 57 correspond to the three-phase coils of the first rotating electrical machine MG1, and the three second connecting members 58 correspond to the three-phase coils of the second rotating electrical machine MG2. The two third connecting members 59 correspond to the input end and the output end of the reactor 14.

  The terminal block 40 has a rectangular main body portion 41 formed in a flat plate shape as a whole, and a plurality of holding portions 42 that surround and hold the periphery of the connection members 57 to 59 across the upper surface and the lower surface of the main body portion 41. , And a plurality of columnar support portions 43 that support the cooler 32 by projecting upward at the four corners of the main body portion 41. In addition, the terminal block 40 further includes a raised portion 44 that protrudes upward in the center portion of the main body portion 41 toward the upper side in the stacking direction L that is the outside of the case 2. A concave portion 44 a (see FIG. 3) that is recessed toward the outer side of the case 2 is formed on the back side of the raised portion 44 (lower side in the stacking direction L that is the inner side of the case 2). The main body portion 41, the holding portion 42, the support portion 43, and the raised portion 44 are integrally formed using a non-conductive resin material. In addition, the connection members 57-59 are comprised using the electroconductive metal material (for example, copper etc.).

  The connection members 57 to 59 are held by the holding portion 42 in a state where the connecting members 57 to 59 are vertically penetrated perpendicularly to the main body portion 41 and both end portions thereof are exposed. The connection members 57 to 59 are held by the holding unit 42 in a liquid-tight state between the holding unit 42 and a sealing member. The holding portion 42 is formed in a box shape on the upper side with respect to the main body portion 41, and is formed in a flat cylindrical shape on the lower side with respect to the main body portion 41. And the part exposed to the upper side or the lower side with respect to the main-body part 41 among the connection members 57-59 is set to 1st rotary electric machine MG1, 2nd rotary electric machine MG2, reactor 14, and switching element units 17-19 etc. It becomes the connection terminal to be connected.

  The first switching element unit 17 is connected to the first connection member 57 via the bus bar 21 on the upper side (the inner side of the cover member 60) with respect to the main body portion 41 of the terminal block 40. The second switching element unit 18 is connected to the second connection member 58 via the bus bar 22. The third switching element unit 19 is connected to the third connection member 59 via the bus bar 23. Further, on the lower side (inside the case 2) with respect to the main body portion 41 of the terminal block 40, the three-phase coil of the first rotating electrical machine MG1 is connected to the first connection member 57 via a lead wire. . A three-phase coil of the second rotating electrical machine MG2 is connected to the second connection member 58 via a lead wire. The third connection member 59 is connected to an input end and an output end of the reactor 14 via a bus bar. In the present embodiment, the reactor 14 is fixed to the lower side of the main body 41 of the terminal block 40. As shown in FIG. 3, the reactor 14 is fixed to the terminal block 40 in a state where a part of the annular core is accommodated in the recess 44a.

  The terminal block 40 is fixed to the upper part of the case 2 so as to cover the case opening 4 provided in the case 2. Here, the terminal block 40 is mounted on the terminal block mounting surface 6 formed flat so as to surround the periphery of the case opening 4 of the case 2, and is fixed to the case 2 in a liquid-tight state via a seal member. Has been. Note that the terminal block 40 is fixed in contact with the upper surface of the support projection 7 formed on the case 2 in order to make the fixing to the case 2 stronger. At this time, the reactor 14 fixed to the lower side of the main body 41 of the terminal block 40 is accommodated in the case 2 from the case opening 4.

  A cooler 32 is fixed on the terminal block 40. Here, the cooler 32 is fixed to support portions 43 formed at four corners of the main body portion 41 of the terminal block 40 via the heat insulating member 31. The cooler 32 includes a pair of upper and lower cooling chamber forming members (a lower cooling chamber forming member 33 and an upper cooling chamber forming member 34). The lower cooling chamber forming member 33 is fixed to the support portion 43 in a state where the upper cooling chamber forming member 34 is fixed on the lower cooling chamber forming member 33. The upper cooling chamber forming member 34 is formed with three openings penetrating vertically, and the switching element modules 17 to 19 are fixed to the upper cooling chamber forming member 34 so as to close these openings. The switching element modules 17 to 19 are integrated with the heat sink 20, and the heat sink 20 is fixed to the upper cooling chamber forming member 34 in a state of closing the opening of the upper cooling chamber forming member 34.

  Here, the first switching element module 17 includes a first inverter circuit 12 for driving the first rotating electrical machine MG1. The first switching element module 17 is configured by integrally forming switching elements E3 to E8, a substrate, and the like constituting the first inverter circuit 12 with a resin. The second switching element module 18 incorporates a second inverter circuit 13 for driving the second rotating electrical machine MG2. The second switching element module 18 is configured by integrally molding the switching elements E9 to E14, the substrate, and the like constituting the second inverter circuit 13 with a resin. The third switching element module 19 includes a booster circuit 11 for boosting the power supply voltage Vb. The third switching element module 19 is formed by integrally molding the switching elements E1, E2 and the substrate constituting the booster circuit 11 with resin.

  The switching elements E1 to E14 included in these switching element modules 17 to 19 generate heat along with the on / off operation. Therefore, the cooling chamber R through which the coolant for cooling the switching elements E1 to E14 that generate heat flows is provided inside the cooler 32, more specifically, the lower cooling chamber forming member 33 and the upper cooling chamber forming member 34. (Here, including the heat sink 20 fixed thereon). That is, the cooling chamber R is formed as an internal space in which one or both of the upper surface of the lower cooling chamber forming member 33 and the lower surface of the upper cooling chamber forming member 34 are recessed at predetermined positions with respect to the mating surfaces. Has been. The mating surfaces at the outer peripheral portions of the lower cooling chamber forming member 33 and the upper cooling chamber forming member 34 are in a liquid-tight state by a seal member so that the coolant does not leak. Thus, by providing the cooler 32 having the cooling chamber R alone inside the cooling chamber R, the cooling chamber R is provided between the case 2 and a member (for example, a case frame) that supports the control device 10, for example. Compared with the case where it is configured to be formed, it is easier to guarantee the sealing performance of the coolant around the cooling chamber R.

  Two tubular members 35 projecting left and right in FIG. 3 along the extending direction of the cooling chamber R are formed integrally with the upper cooling chamber forming member 34. Each tubular member 35 is formed in a cylindrical shape, and one of the openings in the axial direction (left and right direction in FIG. 3) of the tubular member 35 communicates with the cooling chamber R. Through these two tubular members 35, the coolant circulating in the coolant circulation circuit CC flows into the cooling chamber R and flows out from the cooling chamber R. At that time, in the cooling chamber R, the cooling liquid cools the switching elements E <b> 1 to E <b> 14 by heat conduction through the heat sink 20. The lower cooling chamber forming member 33 is formed using a metal material such as aluminum, and the upper cooling chamber forming member 34 and the tubular member 35 are formed using a resin material.

  In addition, the control board 38 is fixed to the lower cooling chamber forming member 33 through the support member 37. The control board 38 is disposed above the switching element modules 17 to 19. Although not shown, in the space between the heat insulating member 31 and the lower cooling chamber forming member 33 and between the switching element modules 17 to 19 and the support member 37, the first smoothing capacitor 15 and the second Components such as the two-smoothing capacitor 16 and the DC-DC converter are fixed as appropriate.

  As can be understood from the above description, in the present embodiment, the switching element modules 17 to 19 and the control board 38 constituting the control device 10 are indirectly attached to the case 2 via the terminal block 40 and the cooler 32. It is fixed. And with respect to the terminal block 40, the cooler 32, the switching element modules 17 to 19 (switching elements E1 to E14), and the control board 38, the cover member 60 is provided from above along the stacking direction L so as to cover them. It is put on. The cover member 60 is placed on a cover placement surface 8 formed flat on the upper portion of the support wall portion 5 of the case 2 and is fixed to the case 2 in a liquid-tight state via a seal member.

  In this embodiment, since the attaching / detaching direction of the cover member 60 coincides with the stacking direction L, the attaching / detaching direction is the extending direction N of the tubular member 35 (the left-right direction in FIG. It is a direction orthogonal to the “direction N” in some cases. In this way, outside of the case 2, the control device 10 for controlling the rotating electrical machines MG <b> 1 and MG <b> 2 (excluding the reactor 14 fixed in the lower side of the terminal block 40 and disposed in the case 2), and then The semiconductor cooling device 50 to be described is fixed integrally. The hybrid drive device H according to this embodiment has a great feature in the connection structure with the coolant circulation circuit CC in the semiconductor cooling device 50. Hereinafter, this point will be described in detail.

1-4. Connection Structure of Semiconductor Cooling Device and Coolant Circulation Circuit The semiconductor cooling device 50 according to the present embodiment includes a cooler 32 having therein a cooling chamber R in which coolant for cooling the switching elements E1 to E14 flows, and cooling A tubular member 35 that forms a flow path communicating with the chamber R, and at least switching elements E1 to E14 (switching element modules 17 to 19), a cooler 32, and a cover member 60 that accommodates the tubular member 35 are configured. Has been. The cover member 60 has a cover opening 62 on a predetermined surface, and the semiconductor cooling device 50 further includes a concave space forming member 70 fixed to the cover opening 62.

  The cover member 60 is mounted on a cover mounting surface 8 (see FIG. 4) formed flat on the upper portion of the support wall portion 5 of the case 2 and fixed to the case 2, and opens downward in the stacking direction L. It is formed in a rectangular parallelepiped shape. The cover member 60 accommodates at least the cooler 32 and the tubular member 35 in the space between the case 2 and the cover member 60 while being fixed to the case 2. Further, the cover member 60 constitutes a part of the control device 10 in a space between the case 2 and switching elements E1 to E14 (switching element modules 17 to 19) to be cooled by the semiconductor cooling device 50. Contained.

  The cover member 60 extends substantially parallel to the stacking direction L so as to cover the flat upper surface that covers the upper side of the stacking direction L with respect to each component housed therein and the four sides of each component. Two flat side surfaces. In the present embodiment, among these four side surfaces, a direction along the extending direction of the cooling chamber R and a direction orthogonal to the axial direction of the rotating electrical machines MG1 and MG2 (here, the left-right direction in FIG. 3). The two side surfaces facing each other are formed as an opening forming surface 61. In the present embodiment, as shown in FIGS. 3 and 5, outside the tip portions 35 a of the two tubular members 35 extending toward the left and right sides in FIG. 3 along the extending direction of the cooling chamber R, respectively. Two opening forming surfaces 61 are arranged in the vicinity of the tip 35a. Each of these two opening forming surfaces 61 is provided with a substantially circular cover opening 62 in front view. These cover openings 62 are provided on the extension line of the distal end portion 35 a along the extending direction N of the tubular member 35. That is, the cover opening 62 is provided at a position on the opening forming surface 61 that intersects a virtual extension line extending from the distal end portion 35 a of the tubular member 35 along the extending direction N of the tubular member 35. Each cover opening 62 is provided so as to have an inner diameter that is, for example, about 2 to 5 times the outer diameter of the tubular member 35 with the intersecting position as the center. A concave space forming member 70 to be described later is attached and fixed to the cover opening 62. In the present embodiment, the cover opening 62 corresponds to the “opening” in the present invention.

  The cooler 32 includes a pair of upper and lower cooling chamber forming members 33 and 34, and has a cooling chamber R in which a coolant for cooling the switching elements E1 to E14 flows. Switching element modules 17 to 19 integrated with the heat sink 20 are fixed to openings formed on the upper surface of the upper cooling chamber forming member 34 constituting the cooler 32. In the present embodiment, the switching elements E1 to E14 included in the switching element modules 17 to 19 are arranged on the same plane facing the cooling chamber R (hereinafter referred to as “element arrangement plane P”, see FIG. 3). Has been. In the present embodiment, the extending surface of the cooling chamber R and the element arrangement surface P are substantially parallel, and the direction orthogonal to the extending surface of the cooling chamber R and the element arrangement surface P and the stacking direction L And are parallel.

  The tubular member 35 is formed in a hollow tubular shape, and forms a flow path (an inflow path and an outflow path) connected to the cooling chamber R and also connected to the coolant circulation circuit CC in its inner peripheral portion. In the present embodiment, the direction along the extending direction of the element arrangement surface P and the direction perpendicular to the axial direction of the rotating electrical machines MG1, MG2 (here, the left-right direction in FIG. 3), The extending direction N of the tubular member 35 is set, and the flow direction of the coolant in the cooling chamber R as a whole is set in the same direction as the extending direction N of the tubular member 35 accordingly. In the present embodiment, with the hybrid drive device H fixed to the vehicle body, the extending direction N of the tubular member 35 and the extending direction of the element arrangement surface P are relative to the vertical direction (vertical direction in FIG. 1). Inclined. Note that these directions may be horizontal. Thus, in the present embodiment, the flow direction of the coolant as a whole and the extending direction N of the tubular member 35 coincide with each other along the extending direction of the element arrangement surface P. The switching element modules 17 to 19 (switching elements E1 to E14) are efficiently cooled in a state where there is little pressure loss when the coolant supplied from the CC flows through the tubular member 35 and the cooling chamber R. Is possible.

  Note that the end of the tubular member 35 on the cover member 60 side, that is, the tip 35 a opposite to the side connected to the cooling chamber R, is closer to the inner side of the cover member 60 than the two opening forming surfaces 61. It is arranged close to the opening forming surface 61. The separation distance between the distal end portion 35a of the tubular member 35 and the opening forming surface 61 is set to a value shorter than the length along the extending direction N of the cylindrical portion 71 of the concave space forming member 70 described below. ing.

  In this embodiment, the concave space forming member 70 is attached to the cover opening 62 by inserting the cover opening 62 from the outside of the cover member 60, and a part of the concave space forming member 70 is located on the inner side of the cover member 60. It is a substantially cylindrical member to be accommodated. The concave space forming member 70 is formed using a resin material. As shown in FIG. 5, in the present embodiment, the concave space forming member 70 includes a substantially cylindrical cylindrical portion 71 and an axial end on the outer side (left side in FIG. 5) of the cover member 60 in the cylindrical portion 71. And a hook-shaped portion 73 extending radially outward from the portion. Here, in this example, the cylindrical portion 71 integrally includes a disc portion 72 that extends radially inward from an axial end portion on the inner side (right side in FIG. 5) of the cover member 60. The cylindrical portion 71 has an outer diameter smaller than the inner diameter of the cover opening 62, passes through the cover opening 62 from the outside of the cover member 60, and the inner side of the cover member 60 with the disc portion 72 as the head. Can enter the space. The disc part 72 has a substantially circular through-hole 72a at its radial center. The inner diameter of the through hole 72 a is larger than the outer shape of the tubular member 35, and the tubular member 35 penetrates the through hole 72 a from the inside of the cover member 60, and enters the space on the radially inner side of the cylindrical portion 71 with the distal end portion 35 a as the head. It is possible to enter. The flange 73 has an outer diameter larger than the inner diameter of the cover opening 62 and is formed in a flat plate shape parallel to the opening forming surface 61 over the entire circumferential direction.

  Further, the recessed space forming member 70 according to the present embodiment further includes a locking claw portion 75 provided on the outer peripheral surface of the cylindrical portion 71. The locking claw portion 75 is integral with the cylindrical portion 71 at a position adjacent to the hook-shaped portion 73 on the inner side (right side in FIG. 5) of the cover member 60 than the hook-shaped portion 73 in the axial direction of the cylindrical portion 71. Is formed. Note that the latching claw portion 75 and the hook-like portion 73 are spaced apart by a distance slightly larger than the thickness of the opening forming surface 61. In this example, a plurality of locking claw portions 75 are dispersedly formed at a plurality of locations in the circumferential direction of the cylindrical portion 71. Each of the locking claws 75 is formed such that the protruding height of the cylindrical portion 71 toward the outer side in the radial direction increases toward the outside of the cover member 60 (left side in FIG. 5).

  The concave space forming member 70 is gradually inserted into the inside of the cover member 60 so as to penetrate the cover opening 62 with the disk portion 72 as the head, and finally the hook-shaped portion 73 contacts the opening forming surface 61. When the recessed space forming member 70 is inserted, the locking claw portion 75 sandwiches the opening forming surface 61 between the hook-shaped portion 73. As a result, the locking claw portion 75 is cooperated with the hook-shaped portion 73 to be relatively positioned along the axial direction (extending direction N) of the cylindrical portion 71 between the hook-shaped portion 73 and the opening forming surface 61. Restrict movement and fix them together. In this way, the recessed space forming member 70 is attached and fixed to the cover opening 62 of the opening forming surface 61. In the present embodiment, the locking claw portion 75 and the hook-shaped portion 73 constitute the “fixing mechanism F1” in the present invention. In addition, according to such a fixing mechanism F1, the concave space forming member 70 and the cover member 60 are fixed by only one operation of inserting the concave space forming member 70 into the cover opening 60 along the extending direction N. can do. Therefore, when such a configuration is adopted, there is an advantage that the manufacturing process can be simplified.

  With the concave space forming member 70 attached to the cover opening 62, the seal member 91 is disposed between the flange 73 and the cover member 60 (opening surface 61). As such a sealing member 91, for example, an O-ring for surface sealing can be used. Further, the seal member 92 is disposed between the inner peripheral surface of the through hole 72 a formed in the disc portion 72 of the cylindrical portion 71 and the outer peripheral surface of the tubular member 35. As such a seal member 92, for example, a member having a seal lip and a metal reinforcing ring can be used. This member can be generally used as an oil seal or the like in a vehicle drive device or the like. In this way, both the concave space forming member 70 and the cover member 60 and between the concave space forming member 70 and the tubular member 35 are in a liquid-tight state.

  Further, as shown in FIGS. 5 and 6, with the concave space forming member 70 attached to the cover opening 62, the concave space forming member 70 is located on the inner side of the cover member 60 with respect to the opening forming surface 61. A recessed concave space CS is formed inside the cylindrical portion 71 in the radial direction. That is, it is a space that is recessed toward the inside of the cover member 60 with respect to the opening forming surface 61 and is partitioned by the inner peripheral surface of the cylindrical portion 71 and the surface of the disc portion 72 that continues from the inner peripheral surface. A concave space CS is formed as a space to be transmitted. The concave space CS is physically disposed on the inner side of the cover member 60 with respect to the opening forming surface 61. On the other hand, the cover member 60, the concave space forming member 70, and a seal therebetween are provided. A surface defined by the structure (hereinafter referred to as “seal surface”) is disposed outside the seal surface.

  As described above, in the present embodiment, the separation distance between the distal end portion 35 a of the tubular member 35 and the opening forming surface 61 is shorter than the length along the extending direction N of the cylindrical portion 71 of the concave space forming member 70. . Therefore, the distal end portion 35a of the tubular member 35 is disposed in the concave space CS with the concave space forming member 70 attached to the cover opening 62. The concave space CS is disposed on the outer side with respect to the seal surface. Therefore, the front-end | tip part 35a of the tubular member 35 is exposed to the exterior side with respect to the sealing surface in the concave space CS. As shown in FIGS. 5 and 6, the tubular member 35 includes a connecting hose 89 (for example, a rubber hose or the like) that defines a part of the coolant circulation circuit CC in the recessed space CS on the outer side with respect to the sealing surface. ). In this example, the connecting hose 89 is extrapolated and connected to the tubular member 35.

  In the configuration of the present embodiment, the distal end portion 35 a of the tubular member 35 is disposed in the concave space CS finally formed by the concave space forming member 70, and physically covers the opening forming surface 61. The cover member 60 is attached to the case 2 along the stacking direction L without interfering with the tubular member 35 in a state before the concave space forming member 70 is attached to the cover opening 62. Can do. Therefore, when the hybrid drive device H is manufactured, it is possible to ensure convenience (ease of manufacturing) when the control device 10 and the semiconductor cooling device 50 are integrated with the case 2.

  In particular, as in this embodiment, in order to reduce the pressure loss when the coolant supplied from the coolant circulation circuit CC flows through the inside of the tubular member 35 and the inside of the cooling chamber R, the extension of the element placement surface P is increased. Covering along the stacking direction L perpendicular to the element arrangement surface P, where both the flow direction of the coolant as a whole and the extending direction N of the tubular member 35 are set along the existing direction. When the member 60 is attached / detached, the attaching / detaching direction of the cover member 60 and the extending direction N of the tubular member 35 are orthogonal to each other. Even in this case, in the present embodiment, since the cover member 60 and the tubular member 35 do not interfere with each other before the concave space forming member 70 is attached to the cover opening 62, the cover member 60 is moved along the stacking direction L. This is particularly advantageous because it can be easily and reliably attached to the case 2.

  Further, by attaching the concave space forming member 70 to the cover opening 62 of the cover member 60 thereafter, the distal end portion 35a of the tubular member 35 is disposed in the concave space CS, and the distal end portion 35a of the tubular member 35 is liquid-tight. The cover member 60 and the concave space forming member 70 integrated in a state can be exposed to the outside. That is, the distal end portion 35a of the tubular member 35 can be exposed to the outside of the sealing surface. Therefore, when removing the connection hose 89 from the tubular member 35, the coolant that spills from the distal end portion 35a of the tubular member 35 can be discharged to the outside of the sealing surface. Thereby, also when removing the connection hose 89 from the tubular member 35 at the time of service such as repair, leakage of the coolant on the inner side of the cover member 60 can be prevented. Therefore, it is possible to suppress the leaked coolant from adversely affecting electronic components such as the switching elements E1 to E14 provided in the control device 10.

  Furthermore, after removing the connection hose 89 from the tubular member 35, the coolant remaining in the cooling chamber R and the like can be sufficiently discharged from the distal end portion 35a of the tubular member 35 outside the sealing surface. Thereby, also when removing the concave space forming member 70 so that the cover member 60 can be removed along the stacking direction L, the leakage of the coolant on the inner side of the cover member 60 is effectively suppressed. Can do.

  Further, after removing the connecting hose 89, the recessed space forming member 70 can be removed from the cover opening 62, and the cover member 60 can be appropriately removed from the case 2 along the stacking direction L. Therefore, in the configuration of the present embodiment, it is excellent in convenience when the control device 10 and the semiconductor cooling device 50 are attached to and detached from the case 2 even during service such as repair of the control device 10 in the hybrid drive device H. Yes.

2. Second Embodiment A second embodiment of the semiconductor cooling device according to the present invention will be described with reference to FIG. Also in this embodiment, the semiconductor cooling device 50 is used to cool the switching elements E1 to E14 included in the control device 10 provided in the hybrid drive device H. The configuration of the semiconductor cooling device 50 according to the present embodiment is basically the same as that of the first embodiment. However, in the present embodiment, the specific configuration for fixing the recessed space forming member 70 to the cover opening 62 is partly different from the first embodiment. Hereinafter, the semiconductor cooling device 50 according to the present embodiment will be described focusing on differences from the first embodiment. Note that points not particularly specified are the same as those in the first embodiment.

  Also in this embodiment, the two opening forming surfaces 61 are each provided with a substantially circular cover opening 62 in front view. These cover openings 62 are provided on the extension line of the distal end portion 35 a along the extending direction N of the tubular member 35. A concave space forming member 70 is attached and fixed to the cover opening 62. Further, in the present embodiment, as shown in FIG. 7, the cover member 60 includes a cylindrical folded portion 64 formed by folding the opening forming surface 61 toward the inner side of the cover member 60. 62 around. A female screw portion 65 is provided on the inner peripheral surface of the folded portion 64. In the present embodiment, since the cover member 60 has such a folded portion 64, the separation distance between the distal end portion 35a of the tubular member 35 and the opening forming surface 61 is along the extending direction N. It is set to a value that is longer than the length of the folded portion 64 and shorter than the length of the cylindrical portion 71 of the concave space forming member 70.

  Also in the present embodiment, the concave space forming member 70 is configured to have a cylindrical portion 71 and a bowl-shaped portion 73. The cylindrical portion 71 has a disc portion 72 integrally. However, the recessed space forming member 70 according to the present embodiment does not have the locking claw portion 75 (see FIG. 5) on the outer peripheral surface of the cylindrical portion 71. The recessed space forming member 70 according to the present embodiment has a male screw portion 76 on the outer peripheral surface of the cylindrical portion 71 in place of such a locking claw portion 75. The cylindrical portion 71 has an outer diameter smaller than the inner diameter of the folded portion 64 (more specifically, the inner diameter of the crest of the male screw portion 76) on the disk portion 72 side in the axial direction, and the cover member It can penetrate the cover opening 62 and the turn-up portion 64 from the outside side of 60 and can enter the space on the inside side of the cover member 60 with the disc portion 72 as the head.

  The concave space forming member 70 according to the present embodiment further includes a male screw portion 76 provided on the outer peripheral surface of the cylindrical portion 71. The male screw portion 76 is provided on the inner side of the cover member 60 (on the right side in FIG. 7) in the axial direction of the cylindrical portion 71 and at a position adjacent to the flange portion 73. The male screw portion 76 is provided so as to be screwed with the female screw portion 65 provided on the inner peripheral surface of the folded portion 64. In the present embodiment, the “threaded portion” in the present invention is configured by the female screw portion 65 provided on the inner peripheral surface of the folded portion 64 and the male screw portion 76 provided on the outer peripheral surface of the cylindrical portion 71. ing.

  The concave space forming member 70 is gradually inserted into the inside of the cover member 60 so as to penetrate the cover opening 62 with the disc portion 72 as the head, and further, the male threaded portion 76 and the folded portion 64 of the cylindrical portion 71. The female thread portion 65 is tightened while being screwed together. Then, the concave space forming member 70 is inserted while being screwed until the flange-shaped portion 73 finally comes into contact with the opening forming surface 61. As a result, the male threaded portion 76 of the cylindrical portion 71 and the female threaded portion 65 of the turned-up portion 64 cooperate with the flanged portion 73 so that the shaft of the cylindrical portion 71 between the flanged portion 73 and the opening forming surface 61 is supported. The relative movement in the direction (extending direction N) is restricted, and these are fixed to each other. In this way, the recessed space forming member 70 is attached and fixed to the cover opening 62 of the opening forming surface 61. In the present embodiment, the “fixing mechanism F1” in the present invention is configured by the male screw portion 76 of the cylindrical portion 71, the female screw portion 65 of the folded portion 64, and the hook-like portion 73. According to such a fixing mechanism F1, the recessed space forming member 70 and the cover member 60 can be detached from each other by tightening or loosening the screwing portion. Therefore, when such a configuration is adopted, there is an advantage that the detachment between the recessed space forming member 70 and the cover member 60 can be switched reversibly without damaging the fixing mechanism F1.

3. Third Embodiment A third embodiment of the semiconductor cooling device according to the present invention will be described with reference to FIG. Also in this embodiment, the semiconductor cooling device 50 is used to cool the switching elements E1 to E14 included in the control device 10 provided in the hybrid drive device H. The configuration of the semiconductor cooling device 50 according to the present embodiment is basically the same as that of the first embodiment. However, in the present embodiment, the specific configuration relating to the connection structure between the coolant circulation circuit CC and the tubular member 35 is partially different from that of the first embodiment. Hereinafter, the semiconductor cooling device 50 according to the present embodiment will be described focusing on differences from the first embodiment. Note that points not particularly specified are the same as those in the first embodiment.

  Also in this embodiment, the two opening forming surfaces 61 are each provided with a substantially circular cover opening 62 in front view. These cover openings 62 are provided on the extension line of the distal end portion 35 a along the extending direction N of the tubular member 35. A concave space forming member 70 is attached and fixed to the cover opening 62. Also in the present embodiment, the concave space forming member 70 is configured to have a cylindrical portion 71 and a bowl-shaped portion 73. The cylindrical portion 71 has a disc portion 72 integrally, and has a locking claw portion 75 on the outer peripheral surface thereof. This locking claw portion 75 constitutes the “first fixing mechanism F1” in the present invention together with the hook-shaped portion 73.

  The recessed space forming member 70 according to this embodiment further includes a second locking claw portion 77 provided on the inner peripheral surface of the cylindrical portion 71. A plurality of the locking claws 77 are formed at the same position as the flange 73 in the axial direction of the cylindrical portion 71 and are dispersed in the circumferential direction. Each locking claw portion 77 is formed such that the protruding height of the cylindrical portion 71 inward in the radial direction increases toward the inner side (right side in FIG. 8) of the cover member 60.

  In the present embodiment, the semiconductor cooling device 50 further includes a substantially cylindrical connecting member 80 connected to the distal end portion 35a of the tubular member 35 in the recessed space CS formed by the recessed space forming member 70. The connecting member 80 is formed using a resin material. The connecting member 80 further includes a substantially cylindrical main body 81 extending along the extending direction N of the tubular member 35, and an axial end of the main body 81 on the outer side (left side in FIG. 8) of the cover member 60. And a protrusion 82 extending to the outside of the cover member 60. The main body 81 has a smaller inner diameter than the cylindrical portion 71 of the concave space forming member 70 and can enter the concave space CS from the outside of the cover member 60. The main body portion 81 has an inner diameter larger than the outer diameter of the tubular member 35, and the tubular member 35 enters the space on the radially inner side of the connecting member 80 from the inner side of the cover member 60 with the distal end portion 35 a as the head. Is possible. Therefore, in this example, the connecting member 80 is extrapolated and connected to the tubular member 35.

  Further, the connecting member 80 includes a protruding portion 84 projecting from the outer peripheral surface of the main body portion 81 toward the radially outer side on the concave space forming member 70 side, and an axial end portion on the outer side of the cover member 60 in the main body portion 81. And a radially extending portion 85 extending radially outward from. The protruding portion 84 and the radially extending portion 85 are formed over the entire circumferential direction on the radially outer side of the slit portion 86 provided in the main body portion 81. In the present embodiment, the protrusion 84 engages with the second locking claw 77 provided on the inner peripheral surface of the cylindrical portion 71 of the concave space forming member 70, and in the state in which these are engaged, the hook-shaped portion is further provided. 73 and the radially extending portion 85 are disposed so as to contact each other.

  As a result, the locking claw portion 77 has the axis of the cylindrical portion 71 between the concave space forming member 70 and the connecting member 80 in cooperation with the protruding portion 84, the radially extending portion 85, and the hook-shaped portion 73. The relative movement along the direction (extending direction N) is restricted, and these are fixed to each other. In this way, the connecting member 80 is attached and fixed to the distal end portion 35a of the tubular member 35 exposed in the concave space CS. A seal member 94 is disposed between the inner peripheral surface of the main body 81 of the connecting member 80 and the outer peripheral surface of the tubular member 35. As such a seal member 94, for example, an O-ring for shaft sealing can be used. In the present embodiment, the hook-shaped portion 73, the locking claw portion 77, the protruding portion 84, and the radially extending portion 85 constitute the “second fixing mechanism F2” in the present invention.

  In a state in which the connecting member 80 is attached to the distal end portion 35 a of the tubular member 35 exposed in the concave space CS, the protruding portion 82 of the connecting member 80 is physically outside the cover member 60 with respect to the opening forming surface 61. Placed in. Of course, the protrusion 82 is also arranged on the outer side of the seal surface. And the protrusion part 82 of the connection member 80 is connected to the connection hose 89 which demarcates a part of coolant circulation circuit CC in the exterior side with respect to both the sealing surface and the opening formation surface 61. FIG. That is, the tubular member 35 is connected to the connecting member 80 in the concave space CS, and is connected to the connecting hose 89 on the outer side with respect to both the sealing surface and the opening forming surface 61 via the connecting member 80. Is done. In this example, the connecting hose 89 is extrapolated and connected to the protruding portion 82 of the connecting member 80.

  According to such a connection structure, since the protruding portion 82 serving as a connection point between the connecting member 80 and the connecting hose 89 can be drawn out of the concave space CS, the connecting member is eliminated by eliminating spatial restrictions. There is an advantage that the work for connection between 80 and the connecting hose 89 can be facilitated. Further, the work performed in the concave space CS is only the work of inserting and removing the connecting member 80 formed of a resin material and having relatively high rigidity along the extending direction N, and the connecting hose 89 having relatively high flexibility is provided. It is not necessary to perform the work of inserting and removing in the concave space CS. Therefore, it is necessary to secure the concave space CS so wide as compared to the case where the connecting hose 89 is directly connected to the tubular member 35 in the concave space CS as in the first and second embodiments. In addition, there is an advantage that the concave space forming member 70 can be reduced in size and a large volume of the internal space of the cover member 60 can be secured.

4). Fourth Embodiment A semiconductor cooling device according to a fourth embodiment of the present invention will be described with reference to FIG. Also in this embodiment, the semiconductor cooling device 50 is used to cool the switching elements E1 to E14 included in the control device 10 provided in the hybrid drive device H. In the present embodiment, the specific configuration for fixing the concave space forming member 70 to the cover opening 62 and the specific configuration related to the connection structure between the coolant circulation circuit CC and the tubular member 35 are the first described above. This is different from the embodiment. Hereinafter, the semiconductor cooling device 50 according to the present embodiment will be described focusing on differences from the first embodiment. Note that points not particularly specified are the same as those in the first embodiment.

  Also in this embodiment, the two opening forming surfaces 61 are each provided with a substantially circular cover opening 62 in front view. These cover openings 62 are provided on the extension line of the distal end portion 35 a along the extending direction N of the tubular member 35. A concave space forming member 70 is attached and fixed to the cover opening 62.

  In this embodiment, the recessed space forming member 70 is attached to the cover opening 62 along the periphery of the cover opening 62 from the inside of the cover member 60, and the entirety thereof is on the inside of the cover member 60. Arranged to be accommodated. The concave space forming member 70 includes a substantially cylindrical cylindrical portion 71 and a hook-shaped portion 73 extending radially outward from an axial end portion of the cylindrical portion 71 on the cover member 60 side (left side in FIG. 9). . In the present embodiment, the cylindrical portion 71 does not have the disc portion 72, and the seal member 92 is disposed between the inner peripheral surface of the cylindrical portion 71 and the outer peripheral surface of the tubular member 35. In the present embodiment, the recessed space CS is a space that is recessed toward the inner side of the cover member 60 with respect to the opening forming surface 61, and is a space that is partitioned by the inner peripheral surface of the cylindrical portion 71 and the seal member 92. Formed as. A female screw portion 78 is provided on the inner peripheral surface of the cylindrical portion 71 on the opening forming surface 61 side.

  The semiconductor cooling device 50 further includes a substantially cylindrical connecting member 80 connected to the distal end portion 35 a of the tubular member 35 in the concave space CS formed by the concave space forming member 70. The connecting member 80 is formed using a resin material. The connecting member 80 further includes a substantially cylindrical main body 81 extending along the extending direction N of the tubular member 35, and an axial end of the main body 81 on the outer side (left side in FIG. 9) of the cover member 60. And a protrusion 82 extending to the outside of the cover member 60. The main body 81 has an outer diameter smaller than the inner diameter of the cover opening 62 and the cylindrical portion 71 of the recessed space forming member 70, and penetrates the cover opening 62 and the cylindrical portion 71 from the outside of the cover member 60. Thus, it is possible to enter the space inside the cover member 60. Further, the main body 81 has an inner diameter larger than the outer diameter of the tubular member 35, and the tubular member 35 is a space on the radially inner side of the connecting member 80 from the inner side of the cover member 60 with the distal end portion 35 a as the head. Can enter. Therefore, in this example, the connecting member 80 is extrapolated and connected to the tubular member 35. The connecting member 80 further includes a radially extending portion 85 that extends radially outward from the main body 81 on the outside of the cover member 60 with respect to the opening forming surface 61. The radially extending portion 85 has an outer diameter larger than the inner diameter of the cover opening 62 and is formed in a flat plate shape that is parallel to the opening forming surface 61 over the entire circumferential direction.

  A male screw portion 87 is provided on the outer peripheral surface of the main body portion 81 on the cooling chamber R side. The male screw portion 87 is provided so as to be screwed with a female screw portion 78 provided on the inner peripheral surface of the cylindrical portion 71 of the concave space forming member 70. In the present embodiment, the internal thread portion 78 provided on the inner peripheral surface of the cylindrical portion 71 of the concave space forming member 70 and the male screw portion 87 provided on the outer peripheral surface of the main body portion 81 of the connecting member 80 The “screwing part” in the invention is configured.

  In a state where the concave space forming member 70 is temporarily fixed along the periphery of the cover opening 62 using a predetermined jig or the like, the cover member 60 is arranged so that the main body 81 of the connecting member 80 penetrates the cover opening 62. While being gradually inserted into the inner side, the male screw portion 87 of the main body portion 81 and the female screw portion 78 of the cylindrical portion 71 are further tightened while being screwed together. Then, until the radial extension part 85 of the connecting member 80 and the flange-like part 73 of the concave space forming member 70 finally hold the opening forming surface 61 between them at a predetermined pressure or higher, the connecting member 80 is It is inserted while being screwed. As a result, the male threaded portion 87 of the main body 81 and the female threaded portion 78 of the cylindrical portion 71 are cooperated with the radially extending portion 85 and the bowl-shaped portion 73 to extend in the radial direction 85 and the bowl-shaped portion 73. The opening forming surface 61 is sandwiched between and fixed integrally. In this way, the recessed space forming member 70 and the connecting member 80 are integrally attached and fixed to the cover opening 62 of the opening forming surface 61 from both sides. In the present embodiment, the “fixing mechanism F1” in the present invention is configured by the male threaded portion 87 of the main body 81, the female threaded portion 78 of the cylindrical portion 71, the radially extending portion 85, and the bowl-shaped portion 73. Has been.

  At this time, the connecting member 80 is attached to the distal end portion 35a of the tubular member 35 exposed in the concave space CS. A seal member 94 is disposed between the inner peripheral surface of the main body 81 of the connecting member 80 and the outer peripheral surface of the tubular member 35. As such a seal member 94, for example, an O-ring or the like can be used. In a state in which the connecting member 80 is attached to the distal end portion 35 a of the tubular member 35 exposed in the concave space CS, the protruding portion 82 of the connecting member 80 is physically outside the cover member 60 with respect to the opening forming surface 61. Placed in. And the protrusion part 82 is connected to the connection hose 89 which demarcates a part of coolant circulation circuit CC in the exterior side with respect to both the sealing surface and the opening formation surface 61. FIG.

5. Other Embodiments Finally, other embodiments of the semiconductor cooling device and the vehicle drive device according to the present invention will be described. Note that the feature configurations disclosed in each of the following embodiments are not applied only in that embodiment, and should be applied in combination with the feature configurations disclosed in the other embodiments unless a contradiction arises. Is also possible.

(1) In each of the above embodiments, the seal member 91 is provided between the flange 73 and the cover member 60 (opening forming surface 61) in a state where the concave space forming member 70 is attached to the cover opening 62. The case where they are arranged has been described as an example. However, the embodiment of the present invention is not limited to this. That is, as long as the space between the concave space forming member 70 and the cover member 60 can be in a liquid-tight state, other structures can be employed. For example, as shown in FIG. 10, the cover member 60 has a cylindrical folded portion 64 formed by folding the opening forming surface 61 on the inner side of the cover member 60 around the cover opening 62, and a cylinder. A configuration in which a seal member 91 (for example, an O-ring for shaft sealing) is disposed between the outer peripheral surface of the portion 71 and the inner peripheral surface of the folded portion 64 is also a preferred embodiment of the present invention. One.

  In the example of FIG. 10, the locking claw portion 75 and the hook-like portion 73 provided on the outer peripheral surface of the cylindrical portion 71 are separated by a distance corresponding to the length along the extending direction N of the folded portion 64. Are arranged. The concave space forming member 70 is gradually inserted into the inside of the cover member 60 through the cover opening 62, and the concave space forming member 70 is finally inserted until the flange 73 comes into contact with the opening forming surface 61. The latching claw portion 75 sandwiches the folded portion 64 with the hook-shaped portion 73. Also in this case, the “fixing mechanism F1” in the present invention is configured by the locking claw portion 75 and the hook-shaped portion 73, as in the first embodiment. In FIG. 10, members having the same functions as the members described in the above embodiments are given the same reference numerals, and descriptions thereof are omitted as appropriate.

(2) In each of the above-described embodiments, the seal member 91 disposed between the bowl-shaped portion 73 and the cover member 60 is configured by a face seal O-ring or the like, and the cylindrical portion 71 (disc portion 72). A seal member 92 disposed between the inner peripheral surface of the tubular member 35 and the outer peripheral surface of the tubular member 35 is a member generally used as an oil seal or the like in a vehicle drive device or the like (here, this is referred to as “oil seal-like” The case where it is comprised by the "member" was demonstrated as an example. However, the embodiment of the present invention is not limited to this. That is, it is sufficient that both the concave space forming member 70 and the cover member 60 and between the concave space forming member 70 and the tubular member 35 are appropriately liquid-tight. The oil seal-like member, O-ring, X-ring and the like can be used in appropriate combination.

(3) In each of the above embodiments, the locking claw portion 75 provided on the outer peripheral surface of the cylindrical portion 71 or the screw provided between the inner peripheral surface of the folded portion 64 and the outer peripheral surface of the cylindrical portion 71. The case where the fixing mechanism (first fixing mechanism) F <b> 1 is configured with the joint (the female screw portion 65 and the male screw portion 76) and the like has been described as an example. However, the embodiment of the present invention is not limited to this. That is, the specific configuration of the fixing mechanism (first fixing mechanism) F1 is arbitrary as long as the mechanism can regulate the relative movement between the hook-shaped portion 73 and the cover member 60 and fix them together. It is possible to adopt the following configuration. As such a fixing mechanism (first fixing mechanism) F1, for example, an adhesive layer (for example, an adhesive layer made of an epoxy resin or the like) provided between the flange 73 and the cover member 60 may be employed. This is one of the preferred embodiments of the present invention. In this case, the concave space forming member 70 and the cover member 60 can be formed without using the seal member 91 due to the adhesive surface between the flange-shaped portion 73 and the adhesive layer and the adhesive surface between the cover member 60 and the adhesive layer. It is also possible to make the space liquid-tight.

(4) In the third embodiment, the second fixing mechanism F <b> 2 includes the second locking claw portion 77 provided on the inner peripheral surface of the cylindrical portion 71 of the recessed space forming member 70, and the connecting member 80. The case where it has the protrusion part 84 which protrudes toward the radial direction outer side which becomes the concave space formation member 70 side from the outer peripheral surface of the main-body part 81 was demonstrated as an example. However, the embodiment of the present invention is not limited to this. That is, for example, the second fixing mechanism F2 is located on the connecting member 80 side from the locking claw portion provided on the outer peripheral surface of the main body 81 of the connecting member 80 and the inner peripheral surface of the cylindrical portion 71 of the concave space forming member 70. It is also one preferred embodiment of the present invention to have a configuration having a protruding portion that protrudes radially inward. Alternatively, the second fixing mechanism F <b> 2 may include a screwing portion provided between the inner peripheral surface of the cylindrical portion 71 of the concave space forming member 70 and the outer peripheral surface of the main body portion 81 of the connecting member 80. This is one of the preferred embodiments of the present invention.

(5) In the said 1st and 2nd embodiment, the case where the connection hose 89 was extrapolated and connected to the tubular member 35 was demonstrated as an example. Moreover, in the said 3rd and 4th embodiment, the case where the connection hose 89 was extrapolated and connected to the protrusion part 82 of the connection member 80 was demonstrated as an example. However, the embodiment of the present invention is not limited to this. That is, for example, a configuration in which the connecting hose 89 is inserted and connected to the tubular member 35 and the protruding portion 82 of the connecting member 80 is also one preferred embodiment of the present invention.

(6) In the said 3rd and 4th embodiment, the case where the connection member 80 was extrapolated and connected to the tubular member 35 was demonstrated as an example. However, the embodiment of the present invention is not limited to this. That is, for example, a configuration in which the connecting member 80 is inserted and connected to the tubular member 35 is also a preferred embodiment of the present invention.

(7) In each of the above-described embodiments, the case where the two tubular members 35 extend in opposite directions on the left and right sides in FIG. 3 along the extending direction of the cooling chamber R has been described as an example. However, the embodiment of the present invention is not limited to this. That is, for example, it is also a preferred embodiment of the present invention that the two tubular members 35 extend in the same direction along the extending direction of the cooling chamber R. In this case, only one of the four side surfaces of the cover member 60 is the opening forming surface 61. Alternatively, it is also a preferred embodiment of the present invention that the two tubular members 35 extend in a direction orthogonal to each other along the extending direction of the cooling chamber R. In this case, of the four side surfaces of the cover member 60, two side surfaces adjacent to each other serve as the opening forming surface 61. Note that the two tubular members 35 may extend in a direction intersecting with each other along the extending direction of the cooling chamber R.

(8) In the above embodiments, the case where the two tubular members 35 extend along the extending direction of the cooling chamber R has been described as an example. However, the embodiment of the present invention is not limited to this. That is, for example, the two tubular members 35 are configured to extend along the attaching / detaching direction of the cover member 60 (corresponding to the stacking direction L in this example) perpendicular to the extending direction of the cooling chamber R. Is also one of the preferred embodiments of the present invention. Alternatively, the two tubular members 35 extend upward or downward perpendicularly to the extending direction of the cooling chamber R (along the stacking direction L), and then bend along the extending direction of the cooling chamber R. The extending configuration is also a preferred embodiment of the present invention. In these cases, the two tubular members 35 may be configured to extend across the extending direction of the cooling chamber R.

(9) In each of the above-described embodiments, the case where the attaching / detaching direction of the cover member 60 (corresponding to the stacking direction L) is the direction orthogonal to the extending direction N of the tubular member 35 has been described as an example. However, the embodiment of the present invention is not limited to this. That is, the present invention can be suitably applied to a configuration in which the attaching / detaching direction of the cover member 60 is a direction intersecting the extending direction N of the tubular member 35. In this case, the inclination angle of the attaching / detaching direction of the cover member 60 with respect to the extending direction N of the tubular member 35 is related to the position of the tip 35a of the tubular member 35 and the position and size of the cover opening 62. It is preferable that the angle is set such that the distal end portion 35a of the tubular member 35 and the cover member 60 do not interfere when the cover member 60 is detached.

(10) In each of the above embodiments, the case where the hybrid drive device H includes the two rotating electric machines MG1 and MG2 and is configured as a two-motor split type hybrid drive device has been described as an example. However, the embodiment of the present invention is not limited to this. That is, for example, it is also a preferred embodiment of the present invention to provide a one-motor split type hybrid drive device without providing the second rotating electrical machine MG2. In addition, the configuration of the drive transmission system is also arbitrary. For example, a so-called one-motor parallel type hybrid drive device including a speed change mechanism or the like instead of the power distribution device is also one preferred embodiment of the present invention. is there.

(11) In the above embodiments, the case where the control device 10 that controls the rotating electrical machines MG1 and MG2 and the semiconductor cooling device 50 are integrally fixed to the outside of the case 2 has been described as an example. However, the embodiment of the present invention is not limited to this. That is, for example, a configuration in which the case 2 and the control device 10 and the semiconductor cooling device 50 are fixed to the vehicle body in a separated state is also one preferred embodiment of the present invention. However, even in this case, it is preferable that the control device 10 and the semiconductor cooling device 50 are provided integrally.

(12) In each of the above embodiments, the vehicle drive device according to the present invention is applied to the hybrid drive device H for a hybrid vehicle that includes both the internal combustion engine and the rotating electrical machine MG as a drive force source for the vehicle. Was described as an example. However, the embodiment of the present invention is not limited to this. That is, the present invention can also be applied to a drive device for an electric vehicle provided with only a rotating electrical machine as a drive force source for the vehicle. Even in this case, it is preferable that the semiconductor cooling device according to the present invention is used for cooling a semiconductor element such as a switching element included in a control device provided in the drive device for the electric vehicle.

(13) In each of the above embodiments, when the semiconductor cooling device 50 targets the switching elements E1 to E14 constituting the inverter circuits 12 and 13 included in the control device 10 that controls the rotating electrical machines MG1 and MG2 as a cooling target. Was described as an example. However, the embodiment of the present invention is not limited to this. That is, for example, another semiconductor element included in the control device 10 (for example, free wheel diodes D1 to D14) may be configured to be cooled by the semiconductor cooling device 50, which is one of the preferred embodiments of the present invention. It is. Alternatively, another semiconductor element included in an electric circuit other than the inverter circuits 12 and 13 provided in the control device 10 that controls the rotating electrical machines MG1 and MG2 is to be cooled by the semiconductor cooling device 50. Is also one preferred embodiment of the present invention.

(14) Regarding other configurations as well, the embodiments disclosed herein are illustrative in all respects, and embodiments of the present invention are not limited thereto. In other words, as long as the configuration described in the claims of the present application and the configuration equivalent thereto are provided, a configuration obtained by appropriately modifying a part of the configuration not described in the claims is naturally also included in the present invention. Belongs to the technical scope.

  The present invention includes a cooler having therein a cooling chamber through which a coolant for cooling a semiconductor element flows, a tubular member forming a flow path communicating with the cooling chamber, and at least a semiconductor element, a cooler, and a tubular member It can utilize suitably for the drive device for vehicles provided with the semiconductor cooling device provided with the cover member to accommodate, and such a semiconductor cooling device.

2 drive device case 10 control device 12 first inverter circuit 13 second inverter circuit 32 cooler 35 tubular member 35a tip portion 60 cover member 61 opening forming surface 62 cover opening portion (opening portion)
64 Folding part 65 Female thread part (screwing part)
70 concave space forming member 71 cylindrical portion 73 hook-like portion 75 locking claw portion 76 male screw portion (screwing portion)
77 Locking claw part 78 Female thread part (screwing part)
80 Connecting member 84 Protruding part 85 Radially extending part 87 Male thread part (screwing part)
H Hybrid drive device (vehicle drive device)
MG1 First rotating electrical machine MG2 Second rotating electrical machine E1-14 switching element (semiconductor element)
R Cooling chamber CC Coolant circulation circuit CS Recessed space F1 First fixing mechanism (fixing mechanism)
F2 second fixing mechanism

Claims (11)

A cooler having therein a cooling chamber in which a coolant for cooling the semiconductor element flows, a tubular member forming a flow path communicating with the cooling chamber, at least the semiconductor element, the cooler, and the tubular member A semiconductor cooling device comprising a cover member for housing,
A predetermined space of the cover member is defined as an opening forming surface, and an opening is provided on the opening forming surface, and the recessed space is attached to the opening and is recessed toward the inside of the cover member with respect to the opening forming surface. A concave space forming member for forming
A tip portion that is an end portion on the opposite side to the side connected to the cooling chamber of the tubular member is disposed in the concave space,
A semiconductor cooling device in which both the concave space forming member and the cover member and the concave space forming member and the tubular member are in a liquid-tight state.   The semiconductor cooling device according to claim 1, wherein a direction in which the cover member is attached and detached is a direction that intersects an extending direction of the tubular member.   The semiconductor cooling device according to claim 1, wherein the opening is provided on an extension line of the tip along the extending direction of the tubular member. The concave space forming member has a substantially cylindrical cylindrical portion and a bowl-shaped portion extending radially outward from an axial end portion of the cylindrical portion,
4. The semiconductor cooling device according to claim 1, further comprising a fixing mechanism that restricts relative movement between the hook-shaped portion and the cover member and fixes them together. 5.   The semiconductor cooling device according to claim 4, wherein the fixing mechanism has a locking claw portion provided on an outer peripheral surface of the cylindrical portion so as to sandwich the cover member between the fixing portion and the hook-shaped portion. The cover member has, around the opening, a cylindrical folded portion that is formed by folding the cover forming surface toward the inner side of the cover member.
The semiconductor cooling device according to claim 4, wherein the fixing mechanism includes a screwing portion provided between an inner peripheral surface of the folded portion and an outer peripheral surface of the cylindrical portion. A cylindrical connecting member connected to the tip of the tubular member in the concave space;
The first fixing mechanism as the first fixing mechanism, and further comprising a second fixing mechanism that restricts relative movement between the concave space forming member and the connecting member and fixes them together. The semiconductor cooling device according to claim 1.   The second fixing mechanism is provided on any one of the inner peripheral surface of the cylindrical portion and the outer peripheral surface of the connecting member, and protrudes radially toward the other, and the inner periphery of the cylindrical portion The semiconductor cooling device according to claim 7, further comprising: a locking claw portion that is provided on any one of the surface and the outer peripheral surface of the connecting member and engages with the protruding portion. A cylindrical connecting member connected to the tip of the tubular member in the concave space;
The fixing mechanism includes a screwing portion provided between an inner peripheral surface of the concave space forming member and an outer peripheral surface of the connecting member, and a radially outer side on the outer side of the cover member with respect to the opening forming surface. A radially extending portion provided on the outer peripheral surface of the connecting member so as to extend to
The semiconductor cooling device according to claim 4, wherein the cover member is sandwiched between the radially extending portion and the flange-like portion by tightening the screwing portion, and these are fixed integrally.   The semiconductor element is disposed on the same plane facing the cooling chamber, and the flow direction of the cooling liquid and the extending direction of the tubular member are set along the extending direction of the plane. Item 3. The semiconductor cooling device according to Item 2. A semiconductor cooling device according to any one of claims 1 to 10, a rotating electrical machine that functions as a driving force source for a vehicle, and a control device that controls the rotating electrical machine,
The semiconductor element is a switching element constituting an inverter circuit included in the control device;
A vehicle drive device in which the semiconductor cooling device and the control device are integrally fixed to a drive device case that houses the rotating electrical machine.

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