DRIVE UNIT FOR A HYBRID VEHICLE

Abstract

Drive device for a hybrid vehicle, comprising: a transmission equipped with drive gears (16A-16F), an input shaft (11) to which a force is supplied from a power source, and an output shaft (12) with output gears (17A-17F) engaging with the drive gears (16A-16F); a drive shaft (15a) connected to the output shaft (12) by a final reduction gear (14); a transmission housing (5) in which the transmission, the final reduction gear (14), and the drive shaft (15a) are arranged; a mounting section (31) arranged on an upper section of the transmission housing (5); an electric motor (32) having an electric motor shaft (32B) and arranged behind the mounting section (31) on the upper section of the transmission housing (5); and a reduction mechanism (33) which is equipped with a plurality of reduction gear sets (37, 38, 39) and acts in such a manner as toto supply a force from the electric motor shaft (32B) to the output shaft (12) of the transmission, characterized in that the reduction mechanism (33) is equipped with at least two intermediate shafts (35, 36) between the electric motor shaft (32B) and the output shaft (12), and the electric motor shaft (32B), the at least two intermediate shafts (35, 36) and the output shaft (12) are arranged along an imaginary line (L1) which is defined as passing through an axis (O1) of the electric motor shaft (32B), axes (O2, O3) of the at least two intermediate shafts (35, 36) and an axis (O4) of the output shaft (12) and extending in a zigzag shape, wherein the at least two intermediate shafts (35, 36) comprise a first intermediate shaft (35) located close to the electric motor shaft (32B) and a second intermediate shaft (36) which is located closer to the output shaft (12) than the first intermediate shaft (35),wherein the first intermediate shaft (35) is arranged such that the axis (O2) is located closer to the mounting section (31) in the longitudinal direction of the vehicle than the axis (O1) of the electric motor shaft (32B) is located, and wherein the second intermediate shaft (36) is arranged such that the axis (O3) is located further away from the mounting section (31) in the longitudinal direction of the vehicle than the axis (O1) of the first intermediate shaft (35) is located.

Description

BACKGROUND OF THE INVENTION Technical field

[0001] The present invention relates generally to a drive device for a hybrid vehicle.

[0002] Japanese patent publication No. 2007-203999 discloses a power transmission device for hybrid vehicles, which is equipped with a reduction mechanism that acts to reduce the power generated by an electric motor, a differential gear that acts to distribute the power delivered by the reduction mechanism to a right and a left wheel, and a gearbox housing in which the differential gear is mounted.

[0003] The aforementioned type of power transmission device for a hybrid vehicle has a differential gear located behind the transmission housing. The drive electric motor and the reduction mechanism, which are quite heavy, are located above the differential gear.

[0004] If the gearbox housing has a mounting section on its upper portion to hold the power transmission device to a vehicle body, this results in an increase in the moment of inertia around the mounting section. This leads to difficulties in reducing mechanical vibrations of the power transmission device through its mounting.

[0005] The reduction mechanism of a conventional power transmission device consists of a plurality of reduction gear sets made up of reduction gears whose axes are arranged along a straight line (see Fig. 9 in the preceding publication). This results in an increase in the dimensions of a reduction gear housing in the direction in which the reduction gears are arranged, such that the drive electric motor is located further away from the mounting section. This results in an increase in the moment of inertia around the mounting section, which leads to significant difficulties in reducing the mechanical vibrations of the power transmission device through its construction. BRIEF SUMMARY OF THE INVENTION

[0006] The invention was conceived with regard to the aforementioned problems. One objective is to provide a drive device for hybrid vehicles by which an electric motor and a reduction mechanism can be arranged in a position that is effective in minimizing mechanical vibrations of the drive device when the electric motor, mounted on an upper section of a gearbox housing, is connected to a gearbox using the reduction mechanism, which is equipped with a plurality of reduction gear sets.

[0007] According to one aspect of the invention, a drive device for a hybrid vehicle is provided, comprising: (a) a transmission equipped with drive gears, a drive shaft to which force is supplied from a power source, and an output shaft with output gears that mesh with the drive gears; (b) a drive shaft connected to the output shaft by a final reduction gear; (c) a transmission housing in which the transmission, the final reduction gear, and the drive shaft are arranged; (d) a mounting section arranged on an upper section of the transmission housing; (e) an electric motor having an electric motor shaft and arranged behind the mounting section on the upper section of the transmission housing;and (f) a reduction mechanism equipped with a plurality of reduction gear sets and acting to transmit a force from the electric motor shaft to the output shaft of the transmission. The reduction mechanism is equipped with at least two intermediate shafts between the electric motor shaft and the output shaft. The electric motor shaft, the at least two intermediate shafts, and the output shaft are arranged along an imaginary line defined as passing through an axis of the electric motor shaft, axes of the at least two intermediate shafts, and an axis of the output shaft, and extending in a zigzag shape. ADVANTAGEOUS EFFECTS OF THE INVENTION

[0008] According to the invention, it is possible to arrange the electric motor and the reduction mechanism in a position that is effective in minimizing mechanical vibrations of the drive device when the electric motor, which is mounted on an upper section of a gearbox housing, is attached to the gearbox using the reduction mechanism which is equipped with the reduction gear sets. List of characters Fig. Figure 1 is a view from the left side, showing a drive device for a hybrid vehicle according to an embodiment of the invention. Fig. Figure 2 is a top view showing a drive device for a hybrid vehicle according to an embodiment of the invention. Fig. Figure 3 is a skeletal view representing a drive device for a hybrid vehicle according to the invention. Fig. 4 is a sectional view along a line IV-IV in Fig. 1. Fig. 5 is a section view along a line VV in Fig. 2. Fig. Figure 6 is a view from the outside, showing a left housing of a drive device for a hybrid vehicle according to an embodiment of the invention. Fig. Figure 7 is a perspective view showing a left housing of a drive unit for a hybrid vehicle according to an embodiment of the invention. Fig. 8 is a sectional view along a line VIII-VIII in Fig. 5. Fig. 9 is a sectional view along a line IX-IX in Fig. 6. Fig. Figure 10 is a view of a structure representing a reduction mechanism of a drive device for a hybrid vehicle according to an embodiment of the invention. EXECUTIONAL FORM FOR REALIZATION OF THE INVENTION

[0009] A drive device for a hybrid vehicle according to one embodiment of the invention comprises: (a) a transmission equipped with drive gears, a drive shaft to which force is supplied from a power source, and an output shaft with output gears that mesh with the drive gears; (b) a drive shaft connected to the output shaft by a final reduction gear; (c) a transmission housing in which the transmission, the final reduction gear, and the drive shaft are arranged; (d) a mounting section arranged on an upper section of the transmission housing; (e) an electric motor having an electric motor shaft and arranged behind the mounting section on the upper section of the transmission housing;and (f) a reduction mechanism equipped with a plurality of reduction gear sets and acting to transmit a force from the electric motor shaft to the output shaft of the transmission. The reduction mechanism is equipped with at least two intermediate shafts between the electric motor shaft and the output shaft. The electric motor shaft, the at least two intermediate shafts, and the output shaft are arranged along an imaginary line defined as passing through an axis of the electric motor shaft, axes of the at least two intermediate shafts, and an axis of the output shaft, and extending in a zigzag shape.

[0010] According to an embodiment of the invention, the drive device for hybrid vehicles allows the electric motor and the reduction mechanism to be arranged in a position that is effective in minimizing mechanical vibrations of the drive device when the electric motor, which is mounted on an upper section of the gearbox housing, is attached to the gearbox using the reduction mechanism equipped with the reduction gear sets. FORM OF EXECUTION

[0011] The following describes a drive device for hybrid vehicles according to an embodiment of the invention with reference to the drawings.

[0012] The Fig. 1 to Fig. Figure 10 shows the drive device for hybrid vehicles according to the embodiment of the invention.

[0013] In the Fig. 1 to Fig. 10. A vertical, a longitudinal, and a lateral direction are based on the drive unit mounted in a hybrid vehicle. A direction perpendicular to the longitudinal direction of the drive unit is the lateral direction. A vertical direction is the vertical direction.

[0014] First, the structure is described.

[0015] In Fig. 1 is a hybrid vehicle 1 (which will henceforth be referred to only as one vehicle) with a vehicle body 2 equipped. The vehicle body 2 a dashboard 3 on, which has a front combustion engine compartment 2A and a rear passenger compartment 2B separates them. In the combustion engine compartment 2A is a drive unit 4 (i.e., a drive device) arranged. The drive unit 4It is equipped with six forward gears and one reverse gear.

[0016] In Fig. 2 is the drive unit 4 with a gearbox housing 5 equipped. The gearbox housing 5 includes a right-hand housing 6 and a left-hand case 7 .

[0017] An internal combustion engine 8 is with the right case 6 connected. The internal combustion engine 8 a crankshaft 9 on (see Fig. 3) The crankshaft 9 is arranged in such a way that it runs in the width direction of the vehicle 1 extends. In other words, the internal combustion engine is 8 According to this embodiment, the vehicle has a transversely mounted internal combustion engine. 1 It is a front-engine, front-wheel-drive (FF) vehicle. The engine 8According to this embodiment, it is realized by an internal combustion engine and serves as a power source.

[0018] The left case 7 is on the one that goes to the combustion engine 8 opposite side of the right case 6 arranged. In other words, the left case is 7 left of the right housing 6 attached. The right housing 6 has an outer peripheral edge that forms a flange 6F defined (see Fig. 8). In the Fig. 7 and Fig. 8 indicates the left case 7 an outer peripheral edge that forms a flange 7F defined.

[0019] As in the Fig. 6 and Fig. As shown in figure 7, it is on the flange 7F a plurality of protrusions 7f trained, into which screws 23A are used (see Fig. 1) The protrusions 7f are along the flange7F arranged.

[0020] On the flange 6F A plurality of unseen protrusions are formed, which belong to the protrusions 7f are aligned. The flange projections 6F and the protrusions 7f of the flange 7F are using the screws 23A attached to each other to form the right housing 6 and the left case 7 to connect them.

[0021] In the right case 6 is a clutch 10 arranged (see Fig. 3) In the left housing 7 are one in Fig. 3 shown drive shaft 11 , a forward output shaft 12 , a reverse output shaft 13 , a final reduction gear 14 as well as a differential gear 15 arranged.

[0022] The drive shaft 11 , the forward output shaft 12and the reverse output shaft 13 are arranged parallel to each other. In this embodiment, the forward output shaft forms 12 an output shaft according to the invention.

[0023] In Fig. 3 is the drive shaft 11 through the clutch 10 with the internal combustion engine 8 coupled, so that one of the combustion engine 8 force generated by the clutch 10 on the drive shaft 11 is transferred. Fig. 3 and Fig. 4 are on the drive shaft 11 a drive gear 16A for the first speed, a drive gear 16B for the second speed, a drive gear 16C for the third speed, a drive gear 16D for the fourth speed, a drive gear 16E for the fifth speed as well as a drive gear 16Fmounted for sixth speed.

[0024] The drive gears 16A and 16B are firmly attached to the drive shaft 11 attached so that they fit together with the drive shaft 11 turn the drive gear 16C up to the drive gear 16F are positioned in such a way that they are in relation to the drive shaft 11 can turn.

[0025] On the forward output shaft 12 are an output gear 17A for the first speed, an output gear 17B for the second speed, an output gear 17C for the third speed, an output gear 17D for the fourth speed, an output gear 17E for the fifth speed, an output gear 17F for the sixth speed as well as a forward axle drive gear 17G Assembled. Each from the output gear 17A to the output gear17F engages with a corresponding gear from the drive gear 16A up to the drive gear 16F one that achieves a predetermined translation ratio.

[0026] The output gears 17A and 17B are mounted on the forward output shaft in this way. 12 mounted so that they are in relation to the forward output shaft 12 They can rotate. The output gears 17C until 17F as well as the axle drive gear 17G are firmly attached to the forward output shaft 12 attached so that they align themselves with the forward output shaft 12 turn.

[0027] When first gear is engaged, the combustion engine 8 force generated by the drive shaft 11 through the drive gear 16A and the output gear 17A on the forward output shaft 12 transferred. When second gear is engaged, the power from the internal combustion engine is transferred.8 force generated by the drive shaft 11 through the drive gear 16B and the output gear 17B on the forward output shaft 12 transmitted.

[0028] A first synchronizer 18 is on the forward output shaft 12 between the output gear 17A and the output gear 17B assembled.

[0029] When first gear is selected during a gearshift operation, the first synchronizer engages. 18 the output gear 17A for the first speed with the forward output shaft 12 When second gear is selected during a gearshift operation, the first synchronizer engages. 18 the output gear 17B for the second speed with the forward output shaft 12 In this way, the output gear rotates. 17A or the output gear 17B together with the forward output shaft12 .

[0030] A second synchronizer 19 is on the drive shaft 11 between the drive gear 16C and the drive gear 16D arranged.

[0031] When third gear is selected during a gear shift, the second synchronizer engages. 19 the drive gear 16C with the drive shaft 11 When fourth gear is selected during a gearshift operation, the second synchronizer engages. 19 the drive gear 16D with the drive shaft 11 In this way, the drive gear rotates. 16C or the drive gear 16D together with the drive shaft 11 .

[0032] When third gear is engaged, the combustion engine 8 force generated by the drive shaft 11 through the drive gear 16C and the output gear 17Con the forward output shaft 12 transferred. When fourth gear is engaged, the power from the combustion engine is transferred. 8 force generated by the drive shaft 11 through the drive gear 16D and the output gear 17D on the forward output shaft 12 transmitted.

[0033] In the manner described above, the [component] acts on the drive shaft. 11 second synchronizer installed 19 to that effect, a gear set from the drive gear 16C and the output gear 17C or a gear set from the drive gear 16D and the output gear 17D to select the forward output shaft 12 the power from the drive shaft 11 to be fed through the selected gear set.

[0034] A third synchronizer 20 is on the drive shaft 11 between the drive gear 16E and the drive gear16F arranged.

[0035] When fifth gear is selected during a gear shift, the third synchronizer engages. 20 the drive gear 16E with the drive shaft 11 When sixth gear is selected during a gearshift operation, the third synchronizer engages. 20 the drive gear 16F with the drive shaft 11 In this way, the drive gear rotates. 16E or the drive gear 16F together with the drive shaft 11 .

[0036] When fifth gear is engaged, the power supplied by the combustion engine is reduced. 8 force generated by the drive shaft 11 through the drive gear 16E and the output gear 17E on the forward output shaft 12 transferred. When sixth gear is engaged, the power from the combustion engine is transferred. 8 force generated by the drive shaft 11through the drive gear 16F and the output gear 17F on the forward output shaft 12 transmitted.

[0037] In the manner described above, the [component] acts on the drive shaft. 11 third synchronizer installed 20 to that effect, a gear set from the drive gear 16E and the output gear 17E or a gear set from the drive gear 16F and the output gear 17F to select the forward output shaft 12 the power from the drive shaft 11 to be fed through the selected gear set.

[0038] The gear set from the drive gear 16D and the output gear 17D is adjacent to the gear set from the drive gear 16E and the output gear 17E in the axial direction of the drive shaft 11 between the second synchronizer 19 and the third synchronizer20 arranged.

[0039] On the reverse output shaft 13 are a reverse gear 22A and a reverse axle drive gear 22B mounted. The reverse gear 22A is like that on the reverse output shaft 13 maintained that it relates to the reverse output shaft 13 can rotate, and engages the output gear 17A one. The reverse axle drive gear 22B is fixed to the reverse output shaft 13 attached so that it fits together with the reverse output shaft 13 turns.

[0040] On the reverse output shaft 13 is a fourth synchronizer 21 It is installed. When reverse gear is selected during a gear shift, the fourth synchronizer engages. 21 the reverse gear 22A with the reverse output shaft 13 , so that the reverse gear 22Atogether with the reverse output shaft 13 turns.

[0041] When reverse gear is engaged, the power supplied by the combustion engine is reduced. 8 force generated by the drive shaft 11 through the drive gear 16A , the output gear 17A , which relates to the forward output shaft 12 can turn, and the reverse gear 22A on the reverse output shaft 13 transmitted.

[0042] The forward axle drive gear 17G and the reverse axle drive gear 22B engage with an axle output gear 15A of the differential gear 15 one, so that the differential gear 15 the force of the forward output shaft 12 or the reverse output shaft 13 through the forward axle drive gear 17G or the reverse axle drive gear 22B is supplied.

[0043] The differential gear 15 is connected to the axle output gear 15A , a differential housing 15B , on whose outer periphery the axle output gear 15A is mounted, and a differential mechanism 15C equipped, which is located in the differential housing 15B is arranged.

[0044] The differential housing 15B has a cylinder 15b on, which is attached to one of its right ends (see Fig. 4) The differential housing 15B also features a cylinder 15c on (see Fig. 5), which is located at one of its left ends. Ends of a left and a right drive shaft 24L and 24R are in the cylinders 15b and 15c used (see Fig. 3).

[0045] The left and right drive shafts 24L and 24R exhibit the ends that are connected to the differential mechanism15C are connected, and have the other ends connected to a left and a right drive wheel, not shown. The differential gear 15 This has the effect of reducing the impact of the combustion engine. 8 generated force using the differential mechanism 15C on the left and right drive shafts 24L and 24R to distribute and then supply them to the drive wheels.

[0046] The axle output gear 15A rotates around an axis 15a around (see Fig. 1) The axis of rotation 15a of the axle output gear 15A forms a drive shaft according to the invention. The axis of rotation 15a of the axle output gear 15A is related to the drive shafts 24L and 24R aligned and also serves as the axis of rotation 15a of the differential housing 15B .

[0047] The drive shaft 11, the forward output shaft 12 , the drive gears 16A until 16F as well as the output gears 17A until 17F form a transmission according to the invention.

[0048] The drive gear 16A and the output gear 17A , the drive gear 16B and the output gear 17B , the drive gear 16C and the output gear 17C , the drive gear 16D and the output gear 17D , the drive gear 16E and the output gear 17E as well as the drive gear 16F and the output gear 17F forming reduction gear sets according to the invention, which are connected to the output shaft 12 selectively transfers power from the drive shaft 11 supply.

[0049] The final reduction gear 14 consists of the forward axle drive gear 17G and the axle output gear 15AThe forward output shaft 12 is through the final reduction gear 14 with the differential housing 15B tied together.

[0050] In the Fig. 1 and Fig. 2 indicates the left case 7 a mounting section 31 on an upper section of the same. On the mounting attachment section. 31 is a plurality of protrusions 31A trained. A mounting bracket (not shown) is attached to the projections 31 A using screws (not shown).

[0051] The mounting bracket is connected to a mounting element equipped with an elastic element located on a left side frame (not shown). This secures the drive unit. 4 held elastically on the left side frame using the mounting bracket and mounting element.

[0052] The internal combustion engine 8It is held elastically by means of a right side frame using a mounting bracket and mounting element, not shown.

[0053] On an upper section of the left casing 7 There is an electric motor inside. 32 behind the mounting section 31 .

[0054] In Fig. The electric motor contains 8 32 an electric motor housing 32A as well as an electric motor shaft 32B , which pass through the electric motor housing 32A so that it can rotate. Inside the electric motor housing 32A A rotor (not shown) and a stator (not shown) are arranged, around which a coil is wound. The electric motor shaft 32B is provided integrally with the rotor.

[0055] When a three-phase alternating current is supplied to the coil, the electric motor generates 32a rotating magnetic field. The stator acts to couple a magnetic flux generated by the coil to the rotor, thus creating a magnetic flux at the electric motor shaft. 32B The attached rotor rotates.

[0056] In Fig. 2 is the left case 7 with a reduction gear housing 25 equipped with a housing element 26 and a cover element 27 It includes the reduction gear housing. 25 is a reduction mechanism 33 arranged (see Fig. 6).

[0057] In the Fig. 3 and Fig. 10 indicates the reduction mechanism 33 a first drive gear 34 , which is on the electric motor shaft 32B of the electric motor 32 is mounted, a first intermediate shaft 35 , a second intermediate wave 36 as well as the output gear 17Dfor the fourth speed, which is on the forward output shaft 12 is mounted.

[0058] On the first intermediate wave 35 is a first driven wheel 35A and a second drive gear 35B mounted. On the second intermediate shaft 36 is a second driven wheel 36A and a third drive gear 36B assembled.

[0059] In Fig. 10 indicates the first driven wheel 35A a larger diameter than that of the first drive gear 34 up and engages the first drive gear 34 one. The first drive gear 34 and the first driven wheel 35A serve as a first reduction gear set 37 , which connects the electric motor shaft 32B and the first intermediate wave 35 manufactures.

[0060] The second drive gear 35Bhas a smaller diameter than that of the first driven wheel 35A and the second driven wheel 36A up and engages the second driven wheel 36A one. The second drive gear 35B and the second driven wheel 36A connect the first intermediate wave 35 and the second intermediate wave 36 together and function as a second reduction gear set 38 .

[0061] The third drive gear 36B has a diameter identical to that of the second driven wheel 36A However, it has a diameter that is larger than that of the output gear. 17D for the fourth speed, and engages the output gear 17D for the fourth speed.

[0062] The third drive gear 36B and the output gear 17D connect the second intermediate wave 36and the forward output shaft 12 together and serve as a third reduction gear set 39 .

[0063] As in Fig. As shown in 5, the third drive gear 36B an axis O3 on, which are located in the vertical direction above an axis O4 the forward output shaft 12 is located. The axis O3 It is also located in the vertical direction below an upper wall 7B of the left case 7 .

[0064] As can be seen from the preceding discussion, the reduction mechanism 33 In most gear sets, a driven gear of the third reduction gear set. 39 through the output gear 17D implemented for the fourth speed.

[0065] In Fig. 3 is the third drive gear 36B of the third reduction gear set 39radially outside the drive gear 16D and the output gear 17D arranged. The first reduction gear set 37 is radially outside the drive gear 16E and the output gear 17E arranged. The second reduction gear set 38 is radially outside the third synchronizer 20 arranged.

[0066] As can be seen from the preceding discussion, the reduction mechanism exhibits 33 the first intermediate wave 35 and the second intermediate wave 36 on which are arranged on a power transmission path, on which the force from the electric motor 32 on the forward output shaft 12 is transferred. The reduction mechanism 33 is designed so that it drives the drive gears 34 , 35B and 36B as well as the driven wheels 35A and 36Ahas diameters chosen to achieve a desired reduction ratio, and it acts to reduce the force applied to the forward output shaft. 12 from the electric motor 32 is supplied.

[0067] The first drive gear 34 , the second drive gear 35B and the third drive gear 36B form drive gears according to the invention. The first driven gear 35A , the second driven wheel 36A and the output gear 17D For the fourth speed, driven wheels are formed according to the invention.

[0068] In Fig. 10 is the first driven wheel 35A so that it is connected to the second driven wheel 36A and the third drive gear 36B overlapping in the radial direction of the same, and it is between the second driven wheel 36Aand the third drive gear 36B arranged.

[0069] In Fig. 5 is the reduction mechanism 33 designed so that it drives the electric motor shaft 32B , the first intermediate wave 35 , the second intermediate wave 36 as well as the forward output shaft 12 exhibits, which are arranged along a first imaginary line LI that passes through the axis O1 the electric motor shaft 32B , the axis O2 the first intermediate wave 35 , the axis O3 the second intermediate wave 36 and the axis O4 the forward output shaft 12 runs through it and extends in a zigzag shape.

[0070] The zigzag shape referred to here represents a line that is bent several times in a Z-shape or bent several times in the longitudinal direction.

[0071] If a second imaginary line L2 , as in Fig. 5 is shown, defined in such a way that it extends in the vertical direction through the axis of rotation. 15a of the axle output gear 15A The electric motor runs through or crosses this area. 32 , the first intermediate wave 35 and the second intermediate wave 36 arranged so that the axis O1 the electric motor shaft 32B , the axis O2 the first intermediate wave 35 and the axis O3 the second intermediate wave 36 closer to the mounting section 31 are located as the second imaginary line L2 in other words, it is located in front of the second imaginary line. L2 are arranged.

[0072] The first intermediate wave 35 is arranged in such a way that the axis O2 in the longitudinal direction closer to the mounting section 31is located as the axis O1 the electric motor shaft 32B in other words, it is located in front of the axis O1 of the electric motor shaft 32B is located.

[0073] The second intermediate wave 36 is arranged in such a way that the axis O3 further away in the longitudinal direction from the mounting section 31 is located as the axis O2 the first intermediate wave 35 in other words, it is located behind the axis O2 the first intermediate wave 35 is located.

[0074] In Fig. 8 includes the housing element 26 a peripheral wall 28 The peripheral wall 28 stands out from a left wall 7A of the left case 7 from the right case 6 away (i.e. to the left) and has an upper end section 28uon, which is located above the upper wall 7B of the left case 7 located. When viewed in the axial direction of the drive shaft. 11 in Fig. 6 indicates the peripheral wall 28 the shape of an L and surrounds the periphery of the reduction mechanism. 33 .

[0075] In Fig. 9 is the cover element 27 using screws 23B (see Fig. 1) at a protruding end 28a the peripheral wall 28 attached or connected to it to form an open end of the peripheral wall 28 to close.

[0076] The housing element 26 includes a side wall 29 , as in the Fig. 6 and Fig. 7 shown. The side wall 29 is located further away from the cover element 27 , in other words, is located near a base end 28bthe peripheral wall 28 , which is the right-hand housing 6 opposite (see the Fig. 8 and Fig. 9).

[0077] In the Fig. 8 and Fig. 9 includes the side wall 29 a vertical wall 29A , extending from the upper wall 7B of the left case 7 extends upwards, as well as a partition wall 29B (see Fig. 6), extending in the vertical direction from a lower section of the vertical wall 29A out in a vertical orientation to the base end 28b the peripheral wall 28 downwards to below the upper wall 7B of the left case 7 extends and a connection between the upper wall 7B and a lower section 28c the peripheral wall 28 produces (see Fig. 6).

[0078] The side wall 29 , which are from the vertical wall29A and the partition 29B consists of, is in the axial direction of the drive shaft 11 between the electric motor 32 and the reduction mechanism 33 arranged as in Fig. 8 shown.

[0079] According to this embodiment, the side wall 29 designed to fit the vertical wall 29A and the partition 29B exhibits elements that are integrally formed together. In other words, a section of the side wall defines 29 , which is located above the upper wall 7B of the left case 7 located on the vertical wall 29A , while a section of the side wall 29 , which is located below the upper wall 7B The partition wall is located 29B defined.

[0080] As in Fig. Figure 8 shows the reduction mechanism. 33 in a reduction gear receiving chamber45 arranged by the cover element 27 , the peripheral wall 28 and the side wall 29 is defined.

[0081] In the Fig. 6 and Fig. 7 is an electric motor carrier 29C on an upper section of the vertical wall 29A arranged. The electric motor carrier 29C It is designed in the shape of a disc and has an outer diameter that is identical to that of the electric motor. 32 is, i.e., with that of the electric motor housing 32A .

[0082] The electric motor carrier 29C exhibits a number of protrusions 29m on which are formed on an outer peripheral section of the same. In other words, the protrusions are 29m along an outer circumference of the electric motor carrier 29C arranged. The electric motor carrier 29C has screws 23C on, which are used in these (see Fig. 5) The connection of the electric motor 32 with the electric motor carrier 29C This is achieved by tightening the screws 23C in threaded holes not shown, which are located in the electric motor housing 32A are trained.

[0083] In Fig. 7 represent three of the advantages 7f of the flange 7F of the left case 7 , located below the electric motor mount 29C are located (i.e. three protrusions between the electric motor carrier) 29C and the partition 29B , as shown by 7f in Fig. 7 (reproduced), a connection with the vertical wall 29A the side wall 29 here.

[0084] In the Fig. 1 and Fig. 5 is an electric motor connecting element 32C behind the electric motor 32 arranged. A power cable (not shown) is connected to the electric motor connection element. 32Cconnected to power the electric motor 32 to drive.

[0085] The electric motor 32 a cooling water inlet pipe 32a and a cooling water outlet pipe 32b on, which are arranged on an upper section of the same. The cooling water inlet pipe 32a leads the electric motor 32 Cooling water is added. After the electric motor has cooled down. 32 The cooling water is drawn from the cooling water outlet pipe. 32b drained.

[0086] As in the Fig. 1 and Fig. The gearbox housing is shown in 2. 5 with a front bracket 46A and a rear bracket 46B equipped. The front bracket 46A connects a right end of the electric motor housing 32A and the right case 6 together, around the electric motor housing 32A on the right case 6 to keep.

[0087] The rear bracket46B connects a rear end of the electric motor connecting element 32C and the right case 6 together to form the electric motor connection element 32C on the right case 6 to hold. In other words, the electric motor 32 at the end of the same, which is further away from the electric motor carrier 29C located on the right side of the case 6 appropriate.

[0088] In Fig. 8 is the vertical wall 29A with bearing brackets 29a and 29b equipped. Each of the bearing brackets 29a and 29b It has a cylindrical shape that extends from the vertical wall 29A out in the direction of the cover element 27 extends. The cover element 27 is equipped with bearing brackets 27a and 27b equipped. Each of the bearing brackets 27a and 27bIt has a cylindrical shape that differs from the cover element. 27 out towards the vertical wall 29A extends there.

[0089] The bearing bracket 29a holds the electric motor shaft 32B and the right side of the first drive gear 34 using a bearing 51A so that they can rotate. The bearing bracket 27a holds the left side of the first drive gear 34 using a bearing 51B so that it can rotate.

[0090] The bearing bracket 29b holds the right end of the first intermediate wave 35 through a warehouse 51C so that it can rotate. The bearing bracket 27b holds the left end of the first intermediate wave 35 using a bearing 51D so that it can turn.

[0091] In Fig. 9 is the partition wall 29Bwith a bearing bracket 29c equipped. The bearing bracket 29c is on a section of the side wall 29 arranged, which provides a connection between the electric motor carrier 29C and the upper wall 7B of the left case 7 manufactures. In other words, the bearing bracket is 29c at a junction between the partition wall 29B and the upper wall 7B of the left case 7 arranged.

[0092] The bearing bracket 29c It is formed in a hollow cylindrical shape with a closed first end (i.e., a closed right end) and an open second end (i.e., an open left end). At a junction of the partition 29B and the upper wall 7B is a more in-depth section 29Hdesigned to hold a gear (i.e., a gear housing), and in this is the third drive gear 36B arranged.

[0093] The in-depth section 29H For holding a gear, a flat surface is required. 29f , extending from an edge of an opening in the bearing bracket 29c out in a radial direction of the second intermediate shaft 36 extends outwards, as well as forming a hollow cylinder 29g , which is located in the axial direction of the second intermediate shaft 36 from an outer periphery of the plane surface 29f extends from.

[0094] The cover element 27 is equipped with a bearing bracket 27c equipped. The bearing bracket 27c It has a hollow cylindrical shape that extends from the cover element. 27 out towards the partition wall 29B extends. The bearing bracket 29cholds the right end of the second intermediate wave 36 using a bearing 51E so that it can rotate. The bearing bracket 27c holds the left end of the second intermediate wave 36 using a bearing 51F so that it can turn.

[0095] The third drive gear 36B According to this embodiment, on the second intermediate shaft 36 mounted, which passes through the partition wall 29B and the cover element 27 so that it can rotate.

[0096] In the manner described above, the electric motor shaft 32B , the first drive gear 34 , the first intermediate wave 35 as well as the second intermediate wave 36 through the side wall 29 and the cover element 27 held in such a way that they can rotate.

[0097] The third drive gear 36Bis radially outside the bearing 51A , that the electric motor shaft 32B holds, on the partition wall 29B arranged. In other words, the third drive gear 36B and the camp 51A in the axial direction of the second intermediate shaft 36 arranged in the same position. More specifically, the third drive gear. 36B and the camp 51A in the radial direction of the second intermediate shaft 36 aligned with each other.

[0098] In Fig. 8 has a left side wall 6A of the right housing 6 a cylindrical bearing bracket 6a up. The bearing bracket 6a holds the right end of the forward output shaft 12 by means of a bearing 51G so that it can turn.

[0099] The cover element 27 features a cylindrical bearing mount 27d up. The bearing bracket 27dholds the left end of the forward output shaft 12 using a bearing 51H so that it can rotate.

[0100] The left side wall 6A of the right housing 6 is equipped with a cylindrical bearing mount (not shown) that secures the right end of the drive shaft 11 using a bearing 511 (see Fig. 4) so ​​that it can rotate.

[0101] In Fig. 4 is the cover element 27 with a cylindrical bearing mount 27e equipped. The bearing bracket 27e holds the left end of the drive shaft 11 using a bearing 51J so that it can rotate.

[0102] In the manner described above, the drive shaft 11 and the forward output shaft 12 through the cover element 27held in such a way that they can rotate. In particular, the cover element holds them in place. 27 the electric motor shaft 32B , the first drive gear 34 , the first intermediate wave 35 , the second intermediate wave 36 , the drive shaft 11 as well as the forward output shaft 12 so that they can rotate.

[0103] In the Fig. 4 and Fig. 8 separates the partition wall 29B the reduction gear receiving chamber 45 and a gearbox mounting chamber 47 inside the left case 7 from each other.

[0104] In the Fig. 4 and Fig. 6 is in the partition wall 29B an opening 29h trained. The drive shaft 11 and the forward output shaft 12 run through the opening 29h through, so that they are inside the reduction gear receiving chamber 45 and the gearbox mounting chamber47 are arranged.

[0105] The drive gears 16A , 16B and 16C as well as the output gears 17A , 17B and 17C are in the gearbox mounting chamber 47 arranged. The drive gears 16D , 16E and 16F as well as the output gears 17D , 17E and 17F are in the reduction gear receiving chamber 45 arranged.

[0106] In the Fig. 4 and Fig. 7 includes the left case 7 a differential housing wall 7C The differential housing wall 7C is located closer to the right-hand casing 6 as the left wall 7A of the left case 7 and the partition 29B condition.

[0107] In Fig. 8 is the left side wall 6A of the right housing 6 with a cylindrical support6b equipped. The carrier 6b emerges from the left side wall 6A from the left case 7 away from. The carrier 6b holds the cylinder 15b (see Fig. 4), located on the right end of the differential housing 15B is arranged using a bearing 51K (see Fig. 4) so ​​that it can turn.

[0108] In Fig. 7 is the differential housing wall 7C with a cylindrical support 7c equipped. The carrier 7c emerges from the differential housing wall 7C from the right case 6 away from. The carrier 7c holds the cylinder 15c , located on the left end of the differential housing 15B (see Fig. 5) is arranged using a bearing 51L so that it can turn around.

[0109] In Fig. 8 is the differential gear15 near the right case 6 inside the left case 7 arranged, that is, it is located at the end of the left casing 6 , which is the internal combustion engine 8 opposite each other, so that the differential gear 15 inside the left side wall 6A and the differential housing wall 7C is arranged (see Fig. 7).

[0110] As in Fig. As shown in section 4, the left housing includes... 7 the left wall 7A , the drive shaft 11 and the forward output shaft 12 in the axial direction of the drive shaft 11 opposite, as well as the differential housing wall 7C , which are part of the differential gear 15 opposite. The left wall 7A and the differential housing wall 7C are in the axial direction of the drive shaft 11 It is developed in stages.

[0111] In the Fig. 7 and Fig. 9 indicates the left case 7 a stepped wall 7D up. The stepped wall 7D establishes a connection between the left wall 7A and the differential housing wall 7C here and is along the cylindrical shape of the support 7c curved.

[0112] As in Fig. As clearly shown in 9, the stepped wall represents 7D a connection with the peripheral wall 28 from here and extends from the peripheral wall 28 out in the direction of the differential housing wall 7C There. The stepped wall 7D is with ribs 48A and 48B equipped.

[0113] The ribs 48A and 48B extend from the differential housing wall 7C out to the left wall 7a and establish a connection between the peripheral wall 28and the partition 29B here.

[0114] In the Fig. 1 and Fig. 2 is a switching unit 41 on an upper section of the left case 7 arranged in front of the electric motor 32 is located. In a planar view of the vehicle 1 are the electric motor 32 and the switching unit 41 before or behind the mounting section 31 near the mounting section 31 arranged.

[0115] The switching unit 41 is activated to initiate a gear shifting process and a clutch operation of the drive unit 4 to realize this. The gear shifting process is a process involving a gear ratio of the drive unit. 4 to change. The coupling process is a process to engage the coupling. 10 the drive unit 4selectively engage or disengage the clutch.

[0116] In Fig. 5 is in the left case 7 a shift and selection shaft 42 arranged. The shift and selection shaft 42 can move in an axial direction and can be positioned in the left housing 7 rotate. The shift and selection shaft 42 is via the switching unit 41 activated.

[0117] If a gearshift lever not shown is used by a driver of the vehicle 1 When moved into a driving position or a reverse position, the switching unit acts 41 in this regard, the shift and selection shaft 42 to operate or move according to a gear shift characteristic curve that shows a parameter-to-parameter relationship between a throttle valve position and a vehicle speed.

[0118] The shift and selection shaft 42 It acts in such a way as to be the first synchronizer18 up to the fourth synchronizer 21 to be selectively actuated using a gearshift mechanism consisting of shift yokes, shift shafts, and shift forks. The shift unit 41 is designed so that the shift and selection shaft 42 It is operated using a hydraulic mechanism or an electric motor mechanism, but it can alternatively be designed to use a different type of mechanism to operate the shift and select shaft. 42 to move.

[0119] Next, the company will be described.

[0120] If the vehicle 1 by means of the internal combustion engine 8 As it moves forward, the combustion engine 8 The generated force is transmitted from the drive shaft to one of the output gears 17A to 17F, which provides a selected gear ratio. 11 by a corresponding one of the drive gears 16Auntil 16F supplied.

[0121] The power is then transferred by the axle drive gear. 17G the forward output shaft 12 to the axle output gear 15A transferred and through the differential mechanism 15C of the differential gear 15 on the left and right drive shafts 24L and 24R distributed, so that the vehicle 1 is moved forwards.

[0122] If it is necessary that the electric motor 32 a torque or force is generated to move the vehicle 1 to move forward is the first driven wheel 35A provided that the first synchronizer 18 up to the fourth synchronizer 21 Each is positioned in a neutral position, the force from the electric motor shaft 32B through the first drive gear 34 supplied.

[0123] Following this, the electric motor 32 The generated force is then passed through the second drive gear. 35B , the second driven wheel 36A and the third drive gear 36B on the output gear 17D transferred for the fourth speed.

[0124] The reduction mechanism 33 is designed so that it drives the drive gears 34 , 35B and 36B as well as the driven wheels 35A and 36A has diameters chosen to provide the required gear ratio. The rotational speed at which the [missing information] is driven by the electric motor 32 The generated force is transmitted through the reduction mechanism. 33 reduced and then the forward output shaft 12 supplied.

[0125] The force is then transferred to the axle output gear. 15A from the axle drive gear 17G the forward output shaft12 supplied to power the vehicle 1 to move forward.

[0126] The drive unit 4 According to this embodiment, the mounting attachment section 31 , which is located on the upper section of the left case 7 is arranged, the electric motor 32 , which is behind the mounting section 31 on the upper section of the left case 7 is arranged, as well as the reduction mechanism 33 equipped with the reduction gear sets 37 , 38 and 39 is equipped and transmits the power from the electric motor shaft 32B of the electric motor 32 on the forward output shaft 12 .

[0127] The reduction mechanism 33 is with the first intermediate wave 35 and the second intermediate wave 36 between the electric motor shaft 32Band the forward output shaft 12 equipped.

[0128] Furthermore, the reduction mechanism 33 , as described above, constructed in such a way that it extends the electric motor shaft 32B , the first intermediate wave 35 , the second intermediate wave 36 as well as the forward output shaft 12 exhibits, which along the first imaginary line L1 are arranged in such a way that they are defined by the axis O1 the electric motor shaft 32B , the axis O2 the first intermediate wave 35 , the axis O3 the second intermediate wave 36 and the axis O4 the forward output shaft 12 runs through it and extends in a zigzag shape.

[0129] By means of the above arrangements, the electric motor shaft is located 32B in comparison, if the electric motor shaft 32B , the first intermediate wave35 , the second intermediate wave 36 as well as the forward output shaft 12 along a first imaginary line L1 are arranged along the axis O1 the electric motor shaft 32B , the axis O2 the first intermediate wave 35 , the axis O3 the second intermediate wave 36 and the axis O4 the forward output shaft 12 through it and extends in a straight line, closer to the forward output shaft 12 The electric motor 32 , which has a high weight, is therefore located close to the gearbox housing in the vertical direction. 5 arranged.

[0130] The position of the electric motor shaft 32B is changed by changing the positions of the axis O2 the first intermediate wave 35 and the axis O3 the second intermediate wave 36It can be modified in the longitudinal direction. This results in an improvement in the degrees of freedom when assembling the electric motor. 32 .

[0131] The electric motor 32 is therefore closer to the mounting section 31 on the upper section of the gearbox housing 5 arranged so that the moment of inertia of the drive unit 4 around the mounting section 31 is reduced around.

[0132] The above arrangements enable the electric motor 32 and the reduction mechanism 33 are arranged in a position that is advantageous with regard to minimizing mechanical vibrations of the drive unit 4 is when the electric motor 32 , which is located on the upper section of the gearbox housing 5 is arranged by the reduction gear sets 37 , 38 and39 equipped reduction mechanism 33 with the forward output shaft 21 is coupled.

[0133] The drive unit 4 According to this embodiment, it is equipped with two intermediate shafts: the intermediate shafts 35 and 36 However, it can alternatively be designed to have three or more intermediate shafts.

[0134] In the drive unit 4 According to this embodiment, the electric motor 32 , the first intermediate wave 35 and the second intermediate wave 36 , as described above, arranged such that the axis O1 the electric motor shaft 32B , the axis O2 the first intermediate wave 35 and the axis O3 the second intermediate wave 36 closer to the mounting section 31 are located as the second imaginary line L2is located when the second imaginary line L2 is defined such that it passes through the axis of rotation in the vertical direction 15a of the axle output gear 15A runs through it or crosses it.

[0135] The above layout allows the electric motor shaft to 32B , the first intermediate wave 35 , the second intermediate wave 36 and the reduction gear sets 37 , 38 and 39 , which the reduction mechanism 33 form, close to the mounting section 31 are arranged in such a way that, in other words, they are positioned in a location that is advantageous in terms of minimizing the mechanical vibrations of the drive unit 4 is.

[0136] The drive unit 4 According to this embodiment, it is designed such that it fits the left housing. 7 of the gearbox housing 5features that with the housing element 26 is equipped with a reduction mechanism 33 is arranged.

[0137] The housing element 26 is with the disc-shaped electric motor carrier 29C equipped, whose outer diameter is identical to that of the electric motor 32 is and on which the electric motor 32 is attached. The electric motor mount 29C is adjacent in the longitudinal direction to the mounting section 31 arranged.

[0138] The first intermediate wave 35 is close to the electric motor shaft 32B arranged and points to the axis O2 on, which in the longitudinal direction are closer to the mounting attachment section 31 is located as the axis O1 the electric motor shaft 32B is located.

[0139] The second intermediate wave 36is located closer to the forward output shaft 12 as the first intermediate wave 35 is located and points to the axis O3 on, which are further away in the longitudinal direction from the mounting attachment section 31 is located as the axis O2 the first intermediate wave 35 is located.

[0140] The above arrangements make it possible for the first intermediate wave to 35 is arranged so that the axis O2 near the mounting section 31 is located, even if the arrangement of the electric motor carrier 29C regarding difficulties in arranging the electric motor shaft 32B near the electric motor mount 29C This results in the first intermediate wave 35 is arranged in a position that is advantageous with regard to reducing the mechanical vibrations of the drive unit 4 is.

[0141] The drive unit 4 According to this embodiment, it is designed to incorporate the reduction mechanism. 33 exhibits, which is connected to the first reduction gear set 37 , which is a coupling between the electric motor shaft 32B and the first intermediate wave 35 manufactures, the second reduction gear set 38 , which provides a coupling between the first intermediate wave 35 and the second intermediate wave 36 manufactures, and the third reduction gear set 39 is equipped with a coupling between the second intermediate shaft 36 and the forward output shaft 12 manufactures.

[0142] The first reduction gear set 37 includes the first drive gear 34 and the first driven wheel 35A , which mesh with each other. The second reduction gear set 38 includes the second drive gear 35Band the second driven wheel 36A , which mesh with each other. Similarly, the third reduction gear set includes 39 the third drive gear 36B and the output gear 17D , which interlock.

[0143] The first driven wheel 35A overlaps with the second driven wheel 36A and the third drive gear 36B in the radial direction and is between the second driven wheel 36A and the third drive gear 36B arranged.

[0144] The foregoing arrangements enable a design of the first driven wheel 35A of the first reduction gear set 37 such that it has a diameter larger than that of the first drive gear 34 This enables the reduction mechanism to function. 33has an increased reduction ratio, and in addition, a reduction in the distance from axis to axis between the first intermediate shaft is achieved. 35 and the second intermediate wave 36 made possible.

[0145] Therefore, it is possible to adjust the electric motor shaft 32B near the upper surface of the left case 7 to arrange the electric motor 32 In other words, close to the mounting section. 31 to arrange so that the electric motor 32 is positioned in a location that is effective in reducing the mechanical vibrations of the drive unit 4 is.

[0146] Although the present invention has been disclosed with respect to the preferred embodiment to facilitate a better understanding thereof, it is evident that the invention can be implemented in various ways without deviating from the basic concept of the invention. Therefore, the invention is to be understood as including all equivalents and possible modifications with respect to the embodiment shown, which can be realized without deviating from the basic concept of the invention as set forth in the appended claims.

Claims

[1] Drive unit for a hybrid vehicle comprising: a transmission which is equipped with drive gears, a drive shaft to which a force is supplied from a power source, and an output shaft with output gears that mesh with the drive gears; a drive shaft which is connected to the output shaft by a final reduction gear, a gearbox housing in which the gearbox, the final reduction gearbox and the drive shaft are arranged; a mounting attachment section that is located on an upper section of the gearbox housing; an electric motor having an electric motor shaft and located behind the mounting attachment section on the upper section of the gearbox housing; and a reduction mechanism equipped with a plurality of reduction gear sets and designed to supply a force from the electric motor shaft to the output shaft of the gearbox, characterized by , that the reduction mechanism is equipped with at least two intermediate shafts between the electric motor shaft and the output shaft and the electric motor shaft, which consists of at least two intermediate shafts and the output shaft, arranged along an imaginary line defined as passing through an axis of the electric motor shaft, axes of the at least two intermediate shafts and an axis of the output shaft, and extending in a zigzag shape. [2] Drive device for a hybrid vehicle according to claim 1, wherein, if the imaginary line is defined as a first imaginary line and a second imaginary line is defined such that it passes through the drive shaft in a vertical direction, the electric motor and the at least two intermediate shafts are arranged such that the axis of the electric motor shaft and the axes of the at least two intermediate shafts are located closer to the mounting section than the second imaginary line. [3] Drive device for a hybrid vehicle according to claim 1 or 2, wherein the transmission housing includes a reduction gear housing in which the reduction mechanism is arranged, wherein the reduction gear housing is equipped with a disc-shaped electric motor carrier having an outer diameter identical to that of the electric motor, and to which the electric motor is attached, wherein the electric motor carrier is arranged in a longitudinal direction of the vehicle adjacent to the mounting attachment section, wherein the at least two intermediate shafts comprise a first intermediate shaft located close to the electric motor shaft and a second intermediate shaft located closer to the output shaft than the first intermediate shaft, wherein the first intermediate shaft is arranged such thatthat the axis is located closer to the mounting section in the longitudinal direction of the vehicle than the axis of the electric motor shaft, and wherein the second intermediate shaft is arranged such that its axis is located further away from the mounting section in the longitudinal direction of the vehicle than the axis of the first intermediate shaft. [4] Drive device for a hybrid vehicle according to claim 3, wherein the reduction gear sets of the reduction mechanism comprise a first reduction gear set that establishes a coupling between the electric motor shaft and the first intermediate shaft, a second reduction gear set that establishes a coupling between the first intermediate shaft and the second intermediate shaft, and a third reduction gear set that establishes a coupling between the second intermediate shaft and the output shaft, wherein each of the first reduction gear set, the second reduction gear set, and the third reduction gear set comprises a drive gear and a driven gear that mesh with each other, and wherein the driven gear of the first reduction gear set overlaps with the driven gear of the second reduction gear set and the drive gear of the third reduction gear set in a radial direction of the same,wherein the driven gear of the first reduction gear set is arranged between the driven gear of the second reduction gear set and the drive gear of the third reduction gear set.

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