JP5287037B2 - Hybrid motor drive device - Google Patents

Description

  The present invention relates to a hybrid motor drive device, and more particularly, to a hybrid vehicle motor drive device.

  Patent Document 1 is a drive device that can start an engine using an electric motor for driving a vehicle, and the power can be freely connected and disconnected between a shaft to which shaft power from the engine is transmitted and a rotor of the motor. An apparatus having a simple clutch is disclosed. In this apparatus, the outer peripheral side of the one-side friction engagement element of the clutch is fixed to the inner peripheral side of the clutch drum, and the inner peripheral side of the rotor core is fixed to the outer peripheral side of the clutch drum.

JP 2006-137406 A

  In the apparatus of Patent Document 1, the connection form between the clutch and the rotor core, in particular, the connection form between the clutch drum and the rotor core is not particularly specified.

  However, in the hybrid motor, there are a large number of components built into the housing, the arrangement density is high, and there is a problem that the temperature of the rotor tends to be high due to frictional heat of the clutch, iron loss or copper loss. .

  An object of the present invention is to provide a hybrid motor driving device having a high cooling performance of a rotor core.

In a first aspect, the present invention provides a wet clutch capable of transmitting power between a pair of engaging elements, an electric motor including a rotor core disposed on an outer peripheral side of the wet clutch, and an inner peripheral side of the pair of A clutch drum connected to one of the engaging elements and having an outer peripheral side connected to the rotor core; and a hybrid motor in which power from a drive source other than the electric motor is transmitted to the other of the pair of engaging elements A drive device, comprising: a first outer spline formed on an outer peripheral surface of the clutch drum; and a first inner spline formed on an inner peripheral surface of the rotor core, wherein the clutch drum and the rotor core It is coupled to rotate integrally with the spline coupling of the said first outer splines first internal spline, further radially formed in the clutch drum It provides a oil hole extending a notch communicating with the oil hole is formed on the inner peripheral surface of the rotor core, the hybrid motor driving apparatus having me.

According to the present invention, the contact area between the rotor core and the clutch drum is increased by spline coupling, i.e., shape coupling due to unevenness, so that the rotor core and the clutch drum are in planar contact with each other, Since heat easily escapes from the rotor core to the clutch drum, the cooling performance of the rotor core is improved. In particular, in the wet clutch, in addition to the pair of engaging elements, the clutch drum is also cooled by the lubricating oil supplied to the wet clutch. Therefore, the contact area between the rotor core and the clutch drum is increased by the spline coupling between them, which is extremely advantageous for cooling the rotor core. Further, the lubricating oil supplied to the clutch is also supplied to the rotor core through the oil holes and the notches, so that the cooling performance of the rotor core is further improved.

  In a preferred embodiment of the present invention, the spline coupling may be performed by fitting or shape coupling the concave portion of one member and the convex portion of the other member. For example, involute coupling, corner-to-corner coupling, semicircular portion Various forms such as bonding between each other can be adopted.

  In a preferred embodiment of the present invention, the clutch drum and the rotor core are formed of a metal having good thermal conductivity, and both are in metal contact.

  The hybrid motor drive device according to a preferred embodiment of the present invention includes a second outer spline formed on one outer peripheral surface of the pair of engaging elements, and a second outer spline formed on the inner peripheral surface of the clutch drum. One of the pair of engaging elements and the clutch drum are coupled to rotate integrally by spline coupling of the second outer spline and the second inner spline, and the first spline. The phases of the inner and outer splines and the second inner and outer splines coincide with each other. According to this aspect, in the inner and outer splines, one convex portion of the pair of engaging elements and the convex portion of the clutch drum are opposed to each other in the radial direction, and one concave portion of the pair of engaging elements and the concave portion of the clutch drum are in the radial direction. Therefore, the length of the clutch drum in the radial direction, that is, the length of the hybrid motor in the radial direction can be reduced.

  An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is an axial cross-sectional view of a hybrid motor driving apparatus according to an embodiment of the present invention. 2A is a cross-sectional view taken along line AA in FIG. 1, and FIG. 2B is a partially enlarged view of FIG. 2A.

  Referring to FIGS. 1, 2A and 2B, a hybrid motor driving apparatus 1 according to an embodiment of the present invention is a wet clutch capable of transmitting power between a pair of engaging elements 3 and 4. 2, an electric motor 5 having a rotor core 6 and a stator core 7 disposed on the outer peripheral side of the wet clutch 2, and a clutch drum having an inner peripheral side connected to one of a pair of engagement elements 4 and an outer peripheral side connected to the rotor core 6 8. The other 3 of the pair of engaging elements is fixed to an input shaft (clutch hub) 9.

  Power from a drive source other than the electric motor 5, for example, an internal combustion engine (not shown) is transmitted to the other 3 of the pair of engagement elements via an input shaft (clutch hub) 9, and one of the pair of engagement elements. 4, the power from the electric motor 5 is transmitted. The power of the internal combustion engine or the electric motor 5 can be taken out via the clutch drum 8.

  Further, the hybrid motor drive device 1 has a first outer spline 8 a formed on the outer peripheral surface of the clutch drum 8 and a first inner spline 6 a formed on the inner peripheral surface of the rotor core 6. The clutch drum 8 and the rotor core 6 are coupled to rotate integrally by spline coupling of the first outer spline 8a and the first inner spline 6a.

  Further, the hybrid motor drive device 1 includes a second outer spline 4b formed on the outer peripheral surface of one of the pair of engagement elements, and a second inner spline 8b formed on the inner peripheral surface of the clutch drum 8. Have. One of the pair of engaging elements 4 and the clutch drum 8 are coupled so as to rotate integrally by spline coupling of the second outer spline 4b and the second inner spline 8b. The rotor core 6 and the clutch drum 8 are preferably formed of at least a portion of the first inner / outer splines 6a, 8a, preferably the entirety, of a metal having high thermal conductivity.

  The first inner and outer splines 6a and 8a and the second inner and outer splines 4b and 8b are in phase with each other. That is, in the first and second inner and outer splines (6a, 8a), (4b, 8b), the four convex portions of the pair of engaging elements and the convex portion of the clutch drum 8 are opposed to each other in the radial direction. One concave portion of the engagement element 4 and the concave portion of the clutch drum 8 face each other in the radial direction. As a result, the length of the clutch drum 8 in the radial direction, that is, the radial length of the hybrid motor drive device is reduced.

  Further, the hybrid motor drive device 1 includes an oil hole 10 formed in the clutch drum 8 and extending along the radial direction, and a notch 11 formed in the inner peripheral surface of the rotor core 6 and communicating with the oil hole 10. Have. The lubricating oil supplied to the wet clutch 2 is also supplied to the rotor core 6 through the oil holes 10 and the notches 11.

  In the hybrid motor driving apparatus 1 according to the embodiment of the present invention described above, the cooling function of the rotor core 6 will be described. The contact area between the rotor core 6 and the clutch drum 8 is increased by the spline coupling of the first inner and outer splines 6a and 8a, that is, the shape coupling due to the unevenness. As a result, heat easily escapes from the rotor core 6 to the clutch drum 8, so that the cooling performance of the rotor core is improved. In particular, in the wet clutch 2, the clutch drum 8 is cooled by the lubricating oil supplied to the wet clutch 2 in addition to the pair of engagement elements 3 and 4. Therefore, the contact area between the rotor core 6 and the clutch drum 8 is increased by the spline coupling between the two, which is extremely advantageous for cooling the rotor core 6.

  The lubricating oil supplied to the wet clutch 2 is also supplied to the rotor core 6 through the oil holes 10 and the notches 11. Thereby, the cooling performance of the rotor core 6 is further improved.

  The present invention is particularly suitably used for a hybrid vehicle motor or a hybrid motor having a plurality of drive sources.

1 is an axial sectional view of a hybrid motor driving apparatus according to an embodiment of the present invention. (A) is AA sectional drawing of FIG. 1, (B) is the elements on larger scale of (A).

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Hybrid motor drive device 2 Wet clutch 3 The other of a pair of engagement element 4 One of a pair of engagement element 4b 2nd outer spline 5 Electric motor 6 Rotor core 6a 1st inner spline 7 Stator core 8 Clutch drum 8a 1st Outer spline 8b Second inner spline 9 Input shaft (clutch hub)
10 Oil hole 11 Notch

Claims (2)

A wet clutch capable of transmitting power between a pair of engagement elements, an electric motor having a rotor core disposed on an outer peripheral side of the wet clutch, an inner peripheral side connected to one of the pair of engagement elements, and an outer peripheral side A hybrid drum driving device, comprising: a clutch drum connected to the rotor core; wherein power from a driving source other than the electric motor is transmitted to the other of the pair of engaging elements;
A first outer spline formed on the outer peripheral surface of the clutch drum;
A first inner spline formed on the inner peripheral surface of the rotor core;
Have
The clutch drum and the rotor core are coupled to rotate integrally by spline coupling of the first outer spline and the first inner spline;
further,
An oil hole formed in the clutch drum and extending along a radial direction;
A notch formed on the inner peripheral surface of the rotor core and communicating with the oil hole;
The a, features and be Ruha Lee Brides motor driving apparatus that. A second outer spline formed on one outer peripheral surface of the pair of engaging elements;
A second inner spline formed on the inner peripheral surface of the clutch drum;
Have
One of the pair of engaging elements and the clutch drum are coupled to rotate integrally by spline coupling of the second outer spline and the second inner spline,
The first phase of the inner and outer spline and the second inner and outer splines match, hybrid motor driving device according to claim 1, wherein a.

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