JP5223694B2 - Shift drive device - Google Patents

Description

  The present invention relates to a shift driving device that drives a driving range and a parking lock by an electric motor in accordance with a shift instruction from a driver.

  In recent years, shift-by-wire devices that detect a shift range selected by a driver and switch an automatic transmission shift range by driving an electric motor in accordance with the detected shift range have come to be used. . In addition, a parking lock mechanism is known in which the output shaft of the automatic transmission is locked, and the output shaft is unlocked in conjunction with the switching operation to another range. Some lock mechanisms are operated by an electric motor.

  Examples of such a shift-by-wire device include those described in Patent Documents 1 and 2 below.

JP 2006-200716 A JP 2007-205578 A

  By the way, in the conventional shift-by-wire device described above, an electric motor, that is, an actuator for operating a shift range switching and a parking lock mechanism is mounted on the transaxle. Conventionally, as an anti-theft mechanism for an actuator, a fixing bolt for fixing the actuator to the transaxle is a special bolt, and this tool cannot be loosened with a commercially available tool.

  However, the use of special bolts as the bolts for fixing the actuator increases the number of parts, increases the manufacturing cost, and deteriorates the assembling property.

  The present invention solves such a problem, and an object of the present invention is to provide a shift drive device that improves the anti-theft performance while reducing the manufacturing cost and improving the assemblability.

  In order to solve the above-described problems and achieve the object, a shift drive device of the present invention includes a transaxle mounted on a vehicle, a shift drive actuator mounted on the transaxle, and the shift drive actuator. And a heat insulator fixed to the transaxle so as to cover the surface.

  In the shift drive device according to the present invention, the shift drive actuator is mounted on the vehicle front side of the transaxle, a connector is provided on the lower side of the shift drive actuator, and a connector opening is provided on the lower side of the heat insulator. A part is formed.

  The shift drive device according to the present invention is characterized in that the connector of the shift drive actuator and the connector opening of the heat insulator are formed on the opposite side of the engine mounted on the vehicle.

  In the shift drive device according to the present invention, the shift drive actuator is mounted on the vehicle upper side of the transaxle, a connector is provided on the vehicle rear side of the shift drive actuator, and the heat insulator extends along the vehicle front-rear direction. Thus, a connector opening is formed.

  In the shift drive device according to the present invention, the heat insulator is fixed to the transaxle by a plurality of fastening bolts, and an engine component is disposed facing the head of at least one fastening bolt in the plurality of fastening bolts. It is characterized by.

  According to the shift drive device of the present invention, the shift drive actuator is mounted on the transaxle mounted on the vehicle, and the heat insulator is fixed to the transaxle so as to cover the shift drive actuator. While improving the prevention performance, it is possible to reduce the manufacturing cost and improve the assembly by eliminating the need for special bolts.

  Embodiments of a shift drive device according to the present invention will be described below in detail with reference to the drawings. Note that the present invention is not limited to the embodiments.

  1 is a schematic view of a shift drive device according to a first embodiment of the present invention as viewed from the front of the vehicle, FIG. 2 is a schematic view of the shift drive device of the first embodiment as viewed from the side of the vehicle, and FIG. FIG. 4 is a schematic view of a hybrid vehicle to which the shift drive device of the first embodiment is applied.

  In the hybrid vehicle to which the shift drive device of Embodiment 1 is applied, as shown in FIG. 5, 11 is an engine (internal combustion engine), 12 is a transaxle, and 13 is a wheel. Therefore, when the crankshaft 11a, which is the output shaft of the engine 11, is rotationally driven, the driving force is transmitted to each wheel 13 via the transaxle 12, and each wheel 13 rotates to advance or reverse the hybrid vehicle. Can do.

  The transaxle 12 includes a damper 14, a first motor generator 15 that mainly functions as a generator, a second motor generator 16 that mainly functions as an electric motor, a power split mechanism 17, a speed change mechanism 18, and a differential 19. It is composed of

  The first and second motor generators 15 and 16 are fixedly disposed so as to face the rotor fixed to the input shaft 21 and the rotor shaft 21a and the case of the transaxle 12 in a non-contact manner with respect to the rotor. And a stator. The power split mechanism 17 has a single pinion type planetary gear mechanism, and drives the drive force output from at least one of the engine 11 and the second motor generator 16 from the counter drive gear 22 and the counter driven gear 23 to the drive pinion. It is transmitted to the final gear 25 via the shaft 24 and further transmitted to the differential 19.

  The speed change mechanism 18 has a single pinion type planetary gear mechanism, which reduces the driving force output from at least one of the engine 11 and the second motor generator 16 at a predetermined reduction ratio, The signal is transmitted from the counter driven gear 23 to the final gear 25 via the drive pinion shaft 24 and further transmitted to the differential 19. That is, the speed change mechanism 18 is configured to use the planetary gear mechanism as a speed reducer.

  The differential 19 is a two-pinion type, and distributes and transmits power input from the final gear 25 to the left and right wheels 13 via the drive shaft 26 as necessary. And in the case which accommodates each component of the transaxle 12 as mentioned above, the oil for lubricating the lubrication required part is enclosed.

  Further, in the hybrid vehicle of the first embodiment, a shift drive device (shift-by-wire system) that drives the switching of the driving range and the parking lock by the electric motor (actuator) according to the shift instruction of the driver is applied to the transaxle 12. ing. The shift drive device is provided with a theft prevention performance improvement function and a heat damage protection performance improvement function.

  In the shift drive device of the present embodiment, as shown in FIGS. 1 to 4, the transaxle 12 is mounted on a hybrid vehicle, and the above-described damper 14, motor generators 15, 16, The power split mechanism 17, the transmission mechanism 18, the differential 19, and the like are accommodated and arranged on the side of the engine 11 (on the right side as viewed from the front of the vehicle or on the passenger seat side).

  A shift drive actuator 32 is fixed to the front portion of the transaxle case 31, that is, the front side in the traveling direction of the hybrid vehicle by a plurality of fastening bolts (not shown). Further, a heat insulator 33 is fixed to a front portion of the transaxle case 31 by a plurality (five in this embodiment) of fastening bolts 34 so as to cover the shift driving actuator 32.

  Therefore, the shift drive actuator 32 is covered with the heat insulator 33, so that the anti-theft performance is improved. That is, in order to remove the shift drive actuator 32, the plurality of fastening bolts 34 must be loosened, the heat insulator 33 removed, and then the plurality of fastening bolts of the shift drive actuator 32 must be loosened. That is, since it takes a long time to remove the shift drive actuator 32, the anti-theft performance is improved. Further, the shift drive actuator 32 is cut off from the outside by the heat insulator 33, whereby the heat of the engine 11 is cut off and the heat damage protection performance is ensured.

  The shift drive actuator 32 has a cylindrical shape, and a connector 32a for power connection is provided on the outer peripheral portion, and a wiring 32b is extended. The heat insulator 33 is composed of a box-shaped main body 33a having one opening for accommodating the shift drive actuator 32, and a flange portion 33b formed integrally with the outer periphery of the main body 33a. Further, the heat insulator 33 has a main body 33a and a flange portion 33b that are substantially square in plan view (shown in FIG. 1), and one corner portion is notched, thereby forming a connector opening 33c. .

  In the heat insulator 33 of the present embodiment, the connector 32 a is fixed to the lower side of the shift drive actuator 32, and the connector opening 33 c is fixed to the lower side of the heat insulator 33. Yes. Further, the connector 32 a of the shift drive actuator 32 and the connector opening 33 c of the heat insulator 33 are formed on the opposite side to the engine 11. That is, the connector 32 a of the shift drive actuator 32 is exposed to the outside from the connector opening 33 c formed below the heat insulator 33 and on the opposite side to the engine 11.

  Therefore, since the connector 32a of the shift drive actuator 32 is exposed downward from the heat insulator 33, it is difficult to remove the connector 32a from above with the engine hood opened, and the antitheft performance is improved. . Further, since the connector 32a of the shift drive actuator 32 is exposed from the heat insulator 33 to the side opposite to the engine 11, the heat of the engine 11 is less likely to act on the connector 32a and the wiring 32b, and the heat damage protection performance. Is secured.

  Further, since the heat insulator 33 has the connector opening 33c opened downward, even if water enters the heat insulator 33, the water is discharged from the connector opening 33c. The submersion of the shift drive actuator 32 is prevented. Furthermore, when fixing the heat insulator 33 to the transaxle case 31, the positioning of the heat insulator 33 is facilitated by fitting the connector opening 33c to the connector 32a, and the assembling property is improved.

  In the heat insulator 33, the flange 33b is fixed to the transaxle case 31 by five fastening bolts 34, and the heads of the two fastening bolts 34 of the five fastening bolts 34 serve as engine parts. The EGR (exhaust gas recirculation) gas pipe 35 is disposed opposite to the EGR gas exhaust pipe 35. That is, as apparent from FIGS. 1 and 3, since the heads of the two fastening bolts 34 face the EGR gas pipe 35 and the gap S between them is narrow, a tool is inserted into the gap S. It becomes difficult to loosen the fastening bolt 34, and the anti-theft performance is improved.

  When the shift driving actuator 32 and the heat insulator 33 are assembled, the shift driving actuator 32 and the heat insulator 33 are mounted on the transaxle 12 and then the transaxle 12 is mounted on the vehicle. Will not drop.

  As described above, in the shift drive device of the first embodiment, the shift drive actuator 32 is fixed to the transaxle 12 mounted on the hybrid vehicle by the plurality of fastening bolts, and the shift drive actuator 32 is covered. In this way, the heat insulator 33 is fixed by a plurality of fastening bolts 34.

  Therefore, the shift drive actuator 32 is covered with the heat insulator 33, and in order to remove the shift drive actuator 32, the plurality of fastening bolts 34 are loosened, the heat insulator 33 is removed, and then the plurality of fastening bolts are removed. Since it takes a long time to remove the shift drive actuator 32, the anti-theft performance is improved while a special bolt or the like is not required, thereby reducing manufacturing costs and improving assembly. be able to. Further, the shift drive actuator 32 is cut off from the outside by the heat insulator 33, whereby the heat of the engine 11 is cut off and the heat damage protection performance can be improved.

  In the shift drive device of the first embodiment, the shift drive actuator 32 is mounted on the front side of the vehicle in the transaxle 12, the connector 32 a is provided on the lower side of the shift drive actuator 32, and the lower side of the heat insulator 33 is provided. A connector opening 33c is formed. Therefore, the connector 32a of the shift drive actuator 32 is exposed downward from the heat insulator 33, making it difficult to pull out the connector 32a from above with the engine hood open, which improves antitheft performance. it can.

  In the shift drive device of the first embodiment, the connector 32 a of the shift drive actuator 32 and the connector opening 33 c of the heat insulator 33 are formed on the opposite side to the engine 11. Accordingly, since the connector 32a of the shift drive actuator 32 is exposed from the heat insulator 33 to the side opposite to the engine 11, the heat of the engine 11 hardly acts on the connector 32a and the wiring 32b, and the heat of the engine 11 Protection performance against harm can be improved.

  Further, in the shift drive device of the first embodiment, the heat insulator 33 is fixed to the transaxle 12 with a plurality of fastening bolts 34, and the EGR gas pipe 35 is disposed facing the heads of the two fastening bolts 34. . Therefore, it becomes difficult to put a tool around the head of each fastening bolt 34 and relax it, and the anti-theft performance can be improved.

  6 is a schematic view of the shift drive device according to the second embodiment of the present invention as viewed from the front of the vehicle, FIG. 7 is a view taken along arrow VII in FIG. 6, and FIG. 8 is a view taken along arrow VIII in FIG. In addition, the same code | symbol is attached | subjected to the member which has the same function as what was demonstrated in the Example mentioned above, and the overlapping description is abbreviate | omitted.

  In the hybrid vehicle according to the second embodiment, a shift drive device (shift-by-wire system) that drives the switching of the driving range and the parking lock by an electric motor (actuator) according to the shift instruction of the driver is applied to the transaxle 12. . The shift drive device is provided with a theft prevention performance improvement function and a heat damage protection performance improvement function.

  In the shift drive device of the present embodiment, as shown in FIGS. 6 to 8, the transaxle 12 is mounted on a hybrid vehicle, and the above-described damper 14, motor generators 15 and 16, The power split mechanism 17, the transmission mechanism 18, the differential 19, and the like are accommodated and arranged on the side of the engine 11 (on the right side as viewed from the front of the vehicle or on the passenger seat side).

  A shift drive actuator 32 is fixed to the upper portion of the transaxle case 31 by a plurality of fastening bolts (not shown). A heat insulator 41 is fixed to the upper portion of the transaxle case 31 by a plurality of (four in this embodiment) fastening bolts 34 so as to cover the shift driving actuator 32.

  Therefore, the shift drive actuator 32 is covered with the heat insulator 41, so that the anti-theft performance is improved. That is, in order to remove the shift drive actuator 32, the plurality of fastening bolts 34 must be loosened and the heat insulator 41 removed, and then the plurality of fastening bolts of the shift drive actuator 32 must be loosened. That is, since it takes a long time to remove the shift drive actuator 32, the anti-theft performance is improved. Further, the shift drive actuator 32 is cut off from the outside by the heat insulator 41, whereby the heat of the engine 11 is cut off and the heat damage protection performance is ensured.

  The shift drive actuator 32 has a cylindrical shape, and a connector 32a for power connection is provided on the outer peripheral portion, and a wiring 32b is extended. The heat insulator 41 is composed of a box-shaped main body 41a having one opening that accommodates the shift drive actuator 32, and a flange portion 41b formed integrally with the outer periphery of the main body 41a. Further, the heat insulator 41 has a main body 41a and a flange portion 41b that are substantially square in a plan view (shown in FIG. 6), and a center portion thereof is cut away to form a connector opening 41c that passes therethrough. Yes.

  In the heat insulator 41 of the present embodiment, the connector 32a is fixed so as to be positioned on the vehicle rear side of the shift drive actuator 32, and the connector opening 41c is positioned so as to penetrate through the vehicle in the front-rear direction. So that it is fixed. That is, in the heat insulator 41, a flange portion 41b is formed on the left and right sides of the vehicle with respect to the main body 41a, and two connector openings 41c are formed through the flange portion 41b. The connector 32a of the shift drive actuator 32 is exposed to the outside from a connector opening 41c formed on the vehicle rear side of the heat insulator 41.

  Therefore, since the connector 32a of the shift drive actuator 32 is exposed from the heat insulator 41 to the rear of the vehicle, it is difficult to remove the connector 32a with the engine hood opened, and the anti-theft performance is improved. Moreover, since the connector 32a of the shift drive actuator 32 is located on the vehicle rear side, the length of the wiring 32b to the vehicle interior side can be shortened. Further, since the connector opening 41 of the heat insulator 41 penetrates in the vehicle front-rear direction, the shift drive actuator 32 can be cooled by the traveling wind.

  Further, the heat insulator 41 has a connector opening 41c that opens in the vehicle front-rear direction and is not connected to a box-shaped opening, so even if water enters the heat insulator 41, By discharging the water from the connector opening 41c, the shift driving actuator 32 is prevented from being submerged. Furthermore, when fixing the heat insulator 41 to the transaxle case 31, the positioning of the heat insulator 41 is facilitated and the assemblability is improved by fitting the connector opening 41c to the connector 32a.

  In the heat insulator 41, the flange portion 41b is fixed to the transaxle case 31 by four fastening bolts 34, and the heads of the two fastening bolts 34 of the four fastening bolts 34 serve as engine parts. The radiator hose 42 is disposed opposite to the radiator hose 42. 6 and 7, the heads of the two fastening bolts 34 are opposed to the radiator hose 42 and the gap S between them is narrow. It is difficult to loosen the bolt 34, and the anti-theft performance is improved.

  As described above, in the shift drive device according to the second embodiment, the shift drive actuator 32 is fixed to the transaxle 12 mounted on the hybrid vehicle by the plurality of fastening bolts, and the shift drive actuator 32 is covered. Thus, the heat insulator 41 is fixed by a plurality of fastening bolts 34.

  Therefore, the shift drive actuator 32 is covered with the heat insulator 41, and in order to remove the shift drive actuator 32, the plurality of fastening bolts 34 are loosened, the heat insulator 33 is removed, and then the plurality of fastening bolts. Since it takes a long time to remove the shift drive actuator 32, the anti-theft performance is improved while a special bolt or the like is not required, thereby reducing manufacturing costs and improving assembly. be able to. Further, the shift drive actuator 32 is cut off from the outside by the heat insulator 41, whereby the heat of the engine 11 is cut off and the heat damage protection performance can be improved.

  In the shift drive device of the second embodiment, the shift drive actuator 32 is mounted on the upper side of the vehicle in the transaxle 12, the connector 32a is provided on the rear side of the shift drive actuator 32, and the front and rear of the heat insulator 41 in the vehicle. A connector opening 41c is formed along the direction. Therefore, the connector 32a of the shift drive actuator 32 is exposed to the rear of the vehicle from the heat insulator 41, and it becomes difficult to pull out the connector 32a from above with the engine hood open, thereby improving theft prevention performance. Can do.

  In each of the above-described embodiments, the shift drive actuator 32 is mounted on the front or upper side of the vehicle in the transaxle 12. However, the present invention is not limited to this position. Also good.

  Moreover, in each Example mentioned above, although the EGR gas piping 35 and the radiator hose 42 as engine parts have been arrange | positioned facing the head of the fastening bolt 34 which fixes the heat insulators 33 and 41, engine parts are limited to these. For example, an intake pipe, an exhaust pipe, or an auxiliary machine may be used.

  As described above, the shift drive device according to the present invention improves the anti-theft performance by fixing the shift drive actuator to the transaxle and fixing the heat insulator so as to cover the shift drive actuator. Therefore, it is intended to reduce the manufacturing cost and improve the assemblability, and is suitable for any vehicle.

It is the schematic which looked at the shift drive device which concerns on Example 1 of this invention from the vehicle front. It is the schematic which looked at the shift drive device of Example 1 from the vehicle side. FIG. 3 is a view taken in the direction of arrow III in FIG. 1. It is IV arrow line view of FIG. It is a schematic block diagram of the hybrid vehicle to which the shift drive device of Example 1 was applied. It is the schematic which looked at the shift drive device which concerns on Example 2 of this invention from the vehicle upper direction. It is a VII arrow line view of FIG. It is a VIII arrow line view of FIG.

DESCRIPTION OF SYMBOLS 11 Engine 12 Transaxle 31 Transaxle case 32 Shift drive actuator 32a Connector 33, 41 Heat insulator 33c, 41c Connector opening 34 Fastening bolt 35 EGR gas piping (engine parts)
42 Radiator hose (engine parts)

Claims (4)

A transaxle mounted on the vehicle;
A shift drive actuator mounted on the transaxle;
A heat insulator fixed to the transaxle so as to cover the shift driving actuator;
Equipped with a,
The shift drive actuator is mounted on a front side of the vehicle in the transaxle, a connector is provided on a lower side of the shift drive actuator, and a connector opening is formed on a lower side of the heat insulator. Shift drive device. The shift drive device according to claim 1 , wherein a connector of the shift drive actuator and a connector opening of the heat insulator are formed on a side opposite to an engine mounted on the vehicle. A transaxle mounted on the vehicle;
A shift drive actuator mounted on the transaxle;
A heat insulator fixed to the transaxle so as to cover the shift driving actuator;
With
The shift drive actuator is mounted on the transaxle above the vehicle, a connector is provided on the rear side of the shift drive actuator, and a connector opening is formed along the vehicle front-rear direction of the heat insulator. A shift drive device characterized by that. A transaxle mounted on the vehicle;
A shift drive actuator mounted on the transaxle;
A heat insulator fixed to the transaxle so as to cover the shift driving actuator;
With
The heat drive is fixed to the transaxle by a plurality of fastening bolts, and an engine component is disposed facing the head of at least one fastening bolt of the plurality of fastening bolts.

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