JP4047295B2 - Vehicle drive device - Google Patents

Description

  The present invention relates to a vehicle drive device used in, for example, a hybrid vehicle, and more particularly to a vehicle drive device using a resolver as a motor rotation sensor.

2. Description of the Related Art Conventionally, a technique for shortening a drive device shaft length by improving the arrangement of a motor, an engine, and a resolver is known. In this method, a partition is provided between the engine and the motor to fix the resolver, and the resolver is disposed inside the stator and rotor of the motor to reduce the axial length of the entire drive device ( For example, see Patent Document 1).
JP 2000-94972 A

However, in the above prior art, a partition wall is newly set, and a resolver is provided here, so that the drive unit shaft length is increased by securing the partition installation space, and the accompanying increase in weight and number of parts are accompanied. There is a problem that you cannot escape.
In addition, when a plurality of harnesses used for extracting angle information from the resolver are bundled and routed, there is a problem that the life of each harness is shortened if the harnesses have a difference in expansion and contraction due to heat.
Therefore, the wiring space of the harness must be secured with sufficient allowance for the expansion and contraction due to the heat of the harness, and as a result, even if the arrangement of the component parts is devised to shorten the drive shaft length, There is a problem that the shaft of the driving device becomes longer as much as it is necessary to provide a margin for the wiring of the harness.

  SUMMARY OF THE INVENTION Therefore, the present invention provides a vehicle drive device that minimizes the wiring space of a resolver harness, flexibly responds to the expansion and contraction of the harness due to heat, can prevent damage to the harness, and can reduce the drive device shaft length. The purpose is to provide.

In order to achieve the above object, the invention described in claim 1 includes at least an engine (for example, the engine E in the embodiment) and a motor (for example, the motor M in the embodiment) as a travel drive source, and a transmission ( For example, a vehicle drive device for a hybrid vehicle that includes the transmission T in the embodiment and the motor is sandwiched between the engine and the transmission, the rotor of the motor (for example, the rotor in the embodiment) 2) A resolver (for example, the resolver R in the embodiment) is provided, and a harness protector (for example, the harness protector 24 in the embodiment) for fixing the resolver's harness (for example, the harness 20 in the embodiment) is provided. This harness protector Suppressing means to permit bending while suppressing the movement of Ness (e.g., protrusions 52 in the embodiment) provided with a crank shaft of the engine (e.g., crank shaft 1 in the embodiment) crankcase surrounding the end (e.g., implemented The crankcase 15 in the embodiment is provided with an oil seal case (for example, the oil seal case 22 in the embodiment), and the resolver stator of the resolver (for example, the resolver stator 17 in the embodiment) is installed in the oil seal case. For example, it is attached so as to face the resolver rotor 14) in the embodiment, and the harness protector is attached to the oil seal case .

With this configuration , when a resolver for confirming the position of the rotor of the motor is provided in the hybrid vehicle drive device in which the motor is sandwiched between the engine and the transmission and the drive device shaft length becomes long, the resolver Even if heat is applied to the harness, the harness protector fixing means for fixing the harness can be easily bent while minimizing the movement of the harness, thereby preventing the life of the harness from being shortened due to friction.

The invention described in claim 2 is characterized in that the harness protector includes a housing portion (for example, the housing groove 51 in the embodiment) in which a plurality of harnesses are aligned and housed in a state of being separated from each other in the same plane. Are provided with suppression means for suppressing the movement of the harness.
By comprising in this way, since a some harness is aligned and accommodated in the accommodating part of the said harness protector in the state mutually spaced apart within the same plane, a harness protector can be shape | molded thinly. Moreover, since each accommodating part is equipped with the suppression means which suppresses the movement of a harness, it can prevent that a harness does not move and each harness contacts in a harness protector.

The invention described in claim 3, wherein the suppressing means is characterized by a projection disposed opposite the housing portion (e.g., projection 52 in the embodiment).
With this configuration, the harness is also trying to move to contract by heat, housed in the housing portion in a state sandwiched between the oppositely disposed projections, shrinkage of other dropout is prevented adjacent fits between the projections Does not interfere with the harness.
The invention described in claim 4 is characterized in that the suppressing means is a protrusion (for example, the protrusion 52 in the embodiment) arranged in a staggered manner in the accommodating portion.
By configuring in this way, even if the harness is contracted by heat and is about to move, the harness is accommodated in the accommodating portion in a state of being sandwiched by the projections arranged in a staggered manner, and the contraction is accommodated between the projections or the harness is deformed Is suppressed by the claw portion and prevented from coming off and does not interfere with other adjacent harnesses.
According to a fifth aspect of the present invention, the accommodating portion can insert the harness in a direction perpendicular to the axial direction of the harness, and restricts the harness from moving in a direction perpendicular to the axial direction. A claw portion (for example, the claw portion 53 in the embodiment) is provided .
By configuring in this way, even if the harness is contracted by heat and tries to move, the deformed harness is suppressed by the claw portion and prevented from coming off, and does not interfere with other adjacent harnesses.

The invention described in claim 6 is characterized in that the harness protector is formed of a metal material.
By comprising in this way, a harness protector functions as a shield material of a harness.

According to the first aspect of the present invention, when the resolver for confirming the position of the rotor of the motor is provided in the drive device of the hybrid vehicle in which the motor is sandwiched between the engine and the transmission and the drive device shaft length becomes long. Even if heat is applied to the resolver's harness, the harness protector's restraining means that secures the harness minimizes movement of the harness and can be easily bent to prevent the harness life from being shortened by friction. There is an effect that the engine and the transmission can be brought close to each other and the drive device shaft length can be shortened by the amount that it is not necessary to secure a line space with allowance in consideration of movement.

According to the invention described in claim 2 , since the plurality of harnesses are arranged and accommodated in a state of being separated from each other in the same plane in the accommodation part of the harness protector, the harness protector can be thinly formed. Only the engine and the transmission can be brought close to each other, and the driving device shaft length can be shortened.

According to the invention described in claims 3 to 5 , even if the harness is contracted by heat and is about to move, the harness is accommodated in the accommodating portion in a state of being sandwiched by the projections arranged in a staggered manner or opposed to each other. Since the harness that is in between or deformed is suppressed by the claw portion and prevented from coming off and does not interfere with other adjacent harnesses, there is an effect that the harness can be reliably prevented from being damaged and the life can be extended.

According to the invention described in claim 6 , since the harness protector functions as a shield material for the harness, there is no need for a separate shield member, and there is an effect that disturbance can be suppressed.

Next, embodiments of the present invention will be described with reference to the drawings.
The vehicle drive device in this embodiment is a drive device used for a hybrid vehicle. Specifically, this vehicle drive device is a drive device used in a hybrid vehicle of a type in which a motor is sandwiched between an engine and a transmission, and can be driven by a motor directly connected to the engine during acceleration. During deceleration, a part of the deceleration energy is converted into electric energy and recovered by a regenerative operation that causes the motor to function as a generator.

  FIG. 1 shows the periphery of a motor M sandwiched between an engine E and a transmission T. One end of the rotor 2 of the motor M is fixed to the end of the crankshaft 1 of the engine E by a bolt 3 coaxially with the crankshaft 1. Here, a magnet 4 is attached to the outer peripheral surface of the rotor 2 of the motor M. A motor case 5 is attached to the engine E with bolts 7 and 7 via a bracket 6, and a stator 8 of the motor M is attached to the motor case 5 via a bracket 10 with bolts 9. 11 is attached at a position facing the magnet 4.

  An input side member of the transmission T is attached to the other end of the rotor 8 via a disc-like mounting bracket 12 fixed by a bolt 16. Therefore, the motor M is sandwiched between the engine E and the transmission T, and the rotor 2 of the motor M, the crankshaft 1 of the engine E, and the input side member of the transmission T are directly connected to each other.

  A ring-shaped resolver rotor 14 to be described later is attached to the outer peripheral surface of the attachment portion 13 of the rotor 2 to the crankshaft 1. An oil seal case 22 is attached to the crankcase 15 that surrounds the end of the crankshaft 1, and a resolver stator 17 is attached to the oil seal case 22 so as to face the resolver rotor 14. The resolver R is constituted by the resolver rotor 14 and the resolver stator 17, and the position of the rotor 2 is detected by the resolver R.

  As shown in FIG. 2, the resolver stator 17 is provided with four-pole teeth 18a, 18b, 18c, and 18d every 90 degrees toward the inside of the resolver stator 17, and the teeth 18a, 18b, 18c, and 18d are provided. A coil is wound around each. This coil is composed of the four-pole teeth 18a, 18b, 18c, 18d exciting coil 19a, and two pairs of opposing teeth 18a, 18b (18c, 18d) output coils 19b (19c).

  The output coil 19b is wound around the teeth 18a and 18c so as to be excited in the same phase as the excitation coil 19a, and the output coil 19c is wound around the teeth 18b and 18d so as to be excited in the opposite phase to the excitation coil 19a. It is disguised. Accordingly, the resolver R is provided with terminals T1 to T6 corresponding to the respective excitation coils, and six harnesses 20 extending to a control unit (not shown) are connected to the terminals T1 to T6. Here, the terminals T1 to T6 are connected to a connector portion 21 of a harness protector 24 described later.

  As shown in FIGS. 3, 4, and 5, the resolver R is attached to an oil seal case 22 of the engine E with bolts 23. A harness protector 24 that protects and stores the harness 20 is attached to the oil seal case 22 in a locked state. Specifically, as shown in FIG. 4, the locking piece 25 extending from the side portion of the harness protector 24 sinks under the clamp seat 27 extending from the oil seal case 22, and the protrusion on the lower surface of the locking piece 25. 26 is engaged with the engagement hole 28 of the clamp seat 27.

  Therefore, the attachment work of the harness protector 24 to the oil seal case 22 can be easily performed. Moreover, since the structure which attaches the harness protector 24 to the oil seal case 22 is employ | adopted, even when applying to the engine E from which a specification differs, since the same harness protector 24 can be used by replacement | exchange only the oil seal case 22, component cost Can be suppressed and versatility can be improved. In FIG. 3, reference numeral 29 denotes a connector for connecting an external device.

  As shown in FIGS. 6 and 7, the harness protector 24 includes a base member 30 that is a resin member and is thin, and two lid members 31 and 32 that cover the base member 30 from above. ing. The base member 30 is formed to be bent along the wiring path of the harness 20, and a connector portion 21 connected to the terminals T <b> 1 to T <b> 6 is formed on the base side, that is, the resolver R side. Here, on the base side of the base member 30, a mounting bracket 33 that is supported by the oil seal case 22 integrally with the base member 30 is provided.

  A first lid member 31 is attached to the base member 30 via a mechanical hinge 34 so as to be openable and closable at one end edge of the tip portion, that is, the end portion opposite to the side where the connector portion 21 is attached. A second lid member 32 is attached to the other side edge of the substantially central portion in the longitudinal direction via a mechanical hinge 34 so as to be opened and closed. That is, the upper portion of the base member 30 in which the six harnesses 20 are accommodated is closed by the first lid member 31 and the second lid member 32, and both are fixed by a repetitive claw, an accommodating portion, and the like described later. It can be done. In attaching the harness 20, the harness 20 may be sequentially pushed into the harness protector 24 by closing the two lid members 31 and 32 in order from either one.

The first lid member 31 includes a claw 35 on the side opposite to the attachment portion of the mechanical hinge 34 and is engaged with a receiving portion 36 provided on the side edge of the corresponding base member 30. In addition, receiving portions 37 are provided at both side edges of the substantially central portion in the longitudinal direction of the first lid member 31 so that the claws 38 and 38 provided on the side edges of the corresponding base member 30 are received and locked. It has become. Further, claw 39 and claw 39 are formed on both side edges on the front end side of first lid member 31 , and are engaged with receiving portions 40, 40 provided on both side edges of corresponding base member 30. .

The second lid member 32 includes a notch 41 on the side opposite to the attachment portion of the mechanical hinge 34 and engages with a claw 42 provided on the side edge of the corresponding base member 30. The locking piece 25 is formed on the side of the claw 42. Further, claws 42 are formed on both side edges on the distal end side of the second lid member 32, and are engaged with receiving portions 43 provided on both side edges on the base side of the corresponding base member 30. .
Here, the first lid member 31 is formed with flexible bending allowance portions 44 and 45 on both sides with the receiving portions 37 and 37 interposed therebetween, and the second lid member 32 has a substantially central portion in the longitudinal direction. A flexible bendable portion 46 is formed in the portion. Accordingly, the base member 30 is closed by bending the first lid member 31 and the second lid member 32 in accordance with the base member 30 that bends in the in-plane and out-of-plane directions with respect to the lid members 31 and 32. be able to.

As shown in FIGS. 6 and 8, the base member 30 includes an accommodation portion 47 that accommodates six harnesses 20 (only two are shown in FIG. 8) that are aligned and separated from each other in the same plane. And a holding means for suppressing the movement of the harness 20, that is, a protrusion 52 described later.
Specifically, in the accommodating portion 47, five partition walls 49 are provided on the bottom wall 48 of the base member 30, and six accommodating grooves 51 are formed by the side walls 50 formed on both sides of the base portion 30 and the partition walls 49. Is formed. Therefore, when each harness 20 is accommodated in the accommodation groove 51, the harnesses 20 are aligned and accommodated in a state of being separated from each other in the same plane.

Here, as shown in FIG. 8, the partition walls 49 and the side walls 50 that form the respective housing grooves 51 are provided with protrusions 52 that project inward in a staggered manner. The distance between the inner ends of the protrusions 52 is set to be approximately equal to the diameter dimension of the harness 20. Therefore, when the harness 20 is housed along the housing groove 51, the harness 20 is restrained from moving in the longitudinal direction by the protrusions 52.
As a result, for example, as shown by a solid line in FIG. 8 , the temperature of the harness 20 accommodated linearly increases, and the harness 20, particularly the wire rod due to the difference in expansion coefficient between the inner wire rod and the covering material, is displaced in the extending direction. If this is the case, the protrusions 52 restrain the movement of the harness 20 covering member in the longitudinal direction. Therefore, the protrusions 52 may be staggered as shown by the chain line in FIG. It can be easily bent and can flexibly cope with extensional deformation.

  As shown in FIG. 9, the protrusions 52 may be provided so as to face each other. In this case, since the harness 20 is sandwiched between the opposing protrusions 52, the movement in the longitudinal direction can be more reliably regulated. In addition, when the harness held at a predetermined interval by the opposing protrusions 52 tends to bend and deform by heat as described above, it is possible to flexibly cope with this. 9 is the same as FIG. 8 except for the arrangement of the protrusions 52, and therefore, the same parts are denoted by the same reference numerals and description thereof is omitted.

  FIG. 10 shows another mode for restricting the movement of the harness 20, and schematically shows only the base member 30. Also in the accommodating portion 47 of this aspect, five partition walls 49 are provided on the bottom wall 48 of the base member 30 in the same manner as described above, and the side walls 50 formed on both sides of the base member 30 and the partition walls 49 are divided into six. A book receiving groove 51 is formed. Therefore, when the harnesses 20 are accommodated in the accommodation grooves 51, the harnesses 20 are accommodated in an aligned manner in a state of being separated from each other in the same plane. In other words, a claw portion 53 that prevents the harness 20 from coming off is formed at the entrance of the accommodation groove 51.

  Therefore, when the harness 20 is housed along the housing groove 51, the harness 20 is locked to the lower portion 53a of the claw portion 53 as shown by a chain line in FIG. The movement of 20 in the longitudinal direction is suppressed. When the harness 20 is further bent thereafter, the harness 20 locked to the lower portion 53a of the claw portion 53 can be flexibly deformed by bending in the longitudinal direction within the depth range of the receiving groove 51. it can. 10 is substantially the same as the structure of FIG. 8 except that a claw portion 53 is provided in place of the protrusion 52 of FIGS. 8 and 9, and therefore the same parts are denoted by the same reference numerals and description thereof is omitted. To do.

  Here, the case where the harness protector 24 is formed of a resin has been described. However, if a metal film is deposited on the surface of the harness protector 24 or the harness protector 24 itself is formed of a metal material, the harness protector 24 is harnessed. Since it functions not only as a physical protection of 20 but as a shielding material, a separate shielding member is not required and disturbance can be suppressed.

According to the above embodiment, when the harness 20 is bundled and connected to the external device from the resolver R, when heat is applied to the harness 20, a frictional force is applied between the adjacent harnesses 20, as in the above-described embodiment. Further, since the movement of the harness 20 housed in the housing portion 47 of the harness protector 24 is reliably suppressed by the protrusion 52 or the claw portion 53, the movement of the harness 20 is minimized and the harness 20 is damaged due to friction. Can be prevented.
Therefore, the engine E and the transmission T can be brought close to each other by the extent that it is not necessary to ensure a sufficient wiring space in consideration of the movement of the harness 20, and specifically, the drive shaft length, specifically, the crankshaft 1 And the total length of the shaft length of the rotor 2 of the motor M can be shortened.
As a result, when applied to a hybrid vehicle in which the motor M is sandwiched between the engine E and the transmission T, it is preferable because the shaft length of the drive device can be relatively shortened and the arrangement space can be reduced.

  Further, since the plurality of harnesses 20 are accommodated in the accommodating portion 47 of the harness protector 24 so as to be spaced apart from each other in the same plane, the harness protector 24 can be formed thin, and accordingly, the engine E and the transmission T can be formed accordingly. And the drive shaft length can be further shortened.

  Even if the harness 20 contracts due to heat and moves, the harness 20 is housed in the housing groove 51 of the housing portion 47 while being sandwiched between the projections 52 arranged in a staggered manner or opposed to each other. However, since this deformation is confined between the protrusions 52, or the deformed harness 20 is suppressed by the claw portion 53 and prevented from coming off and does not interfere with other adjacent harnesses 20, the harness 20 is reliably prevented from being damaged. Can extend the lifespan.

  The present invention is not limited to the above-described embodiment. For example, the case where the present invention is applied to a vehicle drive device used in a hybrid vehicle has been described. However, the present invention also applies to a vehicle drive device used in an electric vehicle equipped with a resolver. Can be applied. In this case, the drive unit shaft length is the length of the rotor of the motor.

It is a section explanatory view of an embodiment of this invention. It is explanatory drawing of the resolver of embodiment of this invention. It is a fragmentary perspective view of the crankcase of an embodiment of this invention. It is layer sectional drawing in the AA line of FIG. It is a principal part enlarged view of FIG. It is a perspective view of the lid member open state of a harness protector. It is a perspective view of the cover member closed state of a harness protector. It is a fragmentary top view of the base member of a harness protector. It is a fragmentary top view which shows the other aspect of the base member of a harness protector. It is sectional drawing which shows another aspect of the base member of a harness protector.

Explanation of symbols

2 Rotor 20 Harness 22 Oil seal case 24 Harness protector 51 Accommodating groove (accommodating portion)
52 Protrusion (suppression means)
53 Claw (Suppression means)
E Engine M Motor R Resolver T Transmission

Claims (6)

A driving apparatus for a hybrid vehicle including at least an engine and a motor as a driving source for travel, a transmission, and the motor being sandwiched between the engine and the transmission, the position of the rotor of the motor And a harness protector for fixing the resolver harness. The harness protector includes restraining means for restraining movement of the harness and allowing bending, and a crank surrounding the crankshaft end of the engine. An oil seal case is provided in the case, a resolver stator of the resolver is attached to the oil seal case so as to face the resolver rotor, and the harness protector is attached to the oil seal case. .   The harness protector includes an accommodating portion that accommodates a plurality of harnesses in an aligned manner in a state of being separated from each other in the same plane, and includes a suppressing unit that suppresses the movement of the harness in the accommodating portion. The vehicle drive device according to claim 1.   The vehicle drive device according to claim 2, wherein the restraining means is a protrusion disposed to face the housing portion.   The vehicle drive device according to claim 2, wherein the suppressing means is a projection arranged in a staggered manner in the housing portion. The housing portion can be inserted with the harness in a direction perpendicular to the axial direction of the harness, and includes a claw portion for restricting the harness from moving in a direction perpendicular to the axial direction. The vehicle drive device according to claim 2.   The vehicle drive device according to claim 1, wherein the harness protector is made of a metal material.

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