JP2000190747A - Reinforcing structure of automobile power train - Google Patents

Abstract

PROBLEM TO BE SOLVED: To shorten a fastening distance to improve rigidity, and increase number of fastening places to improve a vibration restraining effect, by fastening a stiffener to a closing side portion to an engine and an intermediate portion of a mission case and a closing side portion to the mission case of a transfer case. SOLUTION: An engine 2 loaded in a standing placement is connected with a power train 4 comprising a transmission 6 and a transfer 8. For reinforcing this power train 4, a stiffener 26 is fastened to a closing side portion to the engine 2 and an intermediate portion of a mission case 10 and a closing side portion to the mission case 10 of a transfer case 12. Thus, by fastening and setting the stiffener 26 at three points, a fastening distance of the stiffener 26 is shortened than that of conventional two-point fastening to improve rigidity of the stiffener 26 itself, and number of fastening places of the stiffener 26 is increased to improve a vibration restraining effect.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reinforcement structure for a power train for an automobile, and more particularly to a reinforcement structure for a power train for an automobile capable of improving rigidity without increasing weight and reducing vibration of a transfer. About.

[0002]

2. Description of the Related Art There is a four-wheel drive type vehicle in which all front wheels and rear wheels are driven by the driving force of an engine. Some of these vehicles are provided with an engine mounted vertically while being oriented in the front-rear direction of a vehicle body, and equipped with a vehicle power train provided by connecting a transmission and a transfer to the engine.

FIG. 13 shows such an automobile power train. In FIG.
Reference numeral denotes an engine mounted on a vehicle body (not shown) of an automobile, and reference numeral 104 denotes an automobile power train. The vehicle power train 104 includes a transmission 106 and a transfer 108.

The vehicle power train 104 is provided with an engine 102 in which a transmission case 110 of a transmission 106 and a transfer case 112 of a transfer 108 are sequentially connected so as to be directed to the rear side of the vehicle body.

[0005] The transfer case 112 is provided with a rear shaft support 114 directed to the rear side of the vehicle body. Also,
The transfer case 112 is directed to one outer side in the width direction of the power train 104 for a vehicle, and
Is provided.

A rear output shaft 118 is provided on the rear shaft support 114 so as to be directed toward the rear side of the vehicle body.
20 is provided. The front shaft support 116 is provided with a front output shaft 122 so as to be directed toward the front side of the vehicle body, and a front propulsion shaft 124 is provided in communication therewith.

The power train 104 for an automobile has a transmission case 110 of a transmission 106 and a transfer case 112 of a transfer 108 which are sequentially connected to the engine 102 so as to be directed in the front-rear direction of the vehicle body. There is a problem of insufficient rigidity. In particular, this automotive powertrain 10
No. 4 has a problem in that the transfer 108 vibrates in the direction shown by the arrow A because the front output shaft 122 is supported on the front support 116 of the transfer case 112 so as to be positioned on one outer side in the width direction.

Accordingly, as shown in FIG. 14, such a reinforcing structure of the automobile power train 104 has a stiffener 126 which is fastened to a portion of the transmission case 110 near the engine and a portion of the transfer case 112 near the transmission case. Some are provided. The reinforcing structure of the automotive powertrain 104 includes a stiffener 12 in a transmission case 110 and a transfer case 112.
6, the rigidity is increased and the transfer 10
8 is prevented.

An example of such a reinforcing structure for an automobile power train is disclosed in Japanese Patent Laid-Open No. Hei 10-244847. The one disclosed in this publication is shown in FIG.
Similarly to 4, an automobile in which a clutch housing and a transmission case are sequentially connected to a vertical engine, and a transfer case is connected to the transmission case, and an output shaft supported by the transfer case is offset outward in the vehicle width direction. In the reinforcing structure for a power train, the offset portion of the transfer case and the vicinity of an engine connecting portion of the clutch housing are connected by a stiffener.

[0010]

FIG.
In the reinforcement structure of the automotive power train 104 shown in FIG.
12 by the stiffener 126 fastened to the arrow A
The rigidity against vibration of the transfer 108 in the direction shown in FIG.

However, in such a reinforcing structure, when the requirement for further vibration reduction is satisfied, the rigidity is increased by increasing the thickness of the stiffener 126 itself, thereby improving the rigidity of the power train 104 for an automobile. There must be.

For this reason, the conventional reinforcing structure of the automobile power train 104 has a disadvantage that the weight increases.
There was an inconvenience that it was not possible to achieve both reduction in vibration and avoidance of weight increase.

[0013]

SUMMARY OF THE INVENTION Accordingly, in order to eliminate the above-mentioned disadvantages, the present invention is provided with an engine mounted on a vehicle body in a front-rear direction, and a transmission and a transfer are mounted on the engine. In a reinforcing structure of a power train for an automobile, which is sequentially connected to be directed in the front-rear direction, a portion near an engine of a transmission case of the transmission, an intermediate portion of the transmission case, and a portion near a transmission case of the transfer case of the transfer. A stiffener fastened to the part is provided.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The reinforcing structure of a power train for an automobile according to the present invention is provided with a stiffener which is fastened to a portion near the engine and an intermediate portion of the transmission case and a portion near the transmission case of the transfer case. The rigidity of the stiffener itself can be increased by shortening the fastening distance of the stiffener than before, and the vibration suppression effect can be improved by increasing the number of fastening locations of the stiffener than before.

[0015]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 8 show a first embodiment of the present invention. In FIGS. 1 and 2, reference numeral 2 denotes an engine which is mounted on the vehicle body standing upright in the front-rear direction of a vehicle body (not shown), and reference numeral 4 denotes an automobile power train. The vehicle power train 4 includes a transmission 6 and a transfer 8.

The transmission 6 has a transmission case 10 in which a clutch, a transmission gear train (not shown), and the like are incorporated. The transmission case 10 includes a first transmission case section 10-1 on the engine 2 proximity side and a second transmission section
The transmission case part 10-2 and the third part on the side away from the engine 2
And a transmission case section 10-3.

The transmission 6 is provided by connecting a first transmission case section 10-1 to the engine 2, and the second transmission case section 1 is connected to the first transmission case section 10-1.
0-2 connected to the second transmission case 10-
The second transmission case 10-3 is connected to the second transmission case 10-3.

The transfer 8 has a transfer case 12 in which a transfer sprocket and a transfer chain (not shown) for distributing driving force are incorporated. The transfer case 12 includes a first transfer case portion 12-1 on the side close to the transmission 6 and a second transfer case portion 12-2 on the side away from the transmission 6.

The transfer 8 includes a transmission 6
The first transfer case section 12-1 is connected to the third transmission case section 10-3, and the second transfer case section 12-2 is connected to the first transfer case section 12-1.

As a result, the vehicle power train 4 is provided with the transmission case 10 of the transmission 6 and the transfer case 12 of the transfer 8 in the engine 2.
Are directed to the rear side of the vehicle body and sequentially connected.

The second transfer case portion 12-2 of the transfer case 12 is provided substantially at the center in the width direction of the vehicle power train 4 and is provided with a rear shaft support portion 14 projecting toward the rear side of the vehicle body. ing. The first and second transfer case sections 12-1 and 12-2 of the transfer case 12 include a power train 4 for an automobile.
Front first and second pivotal support 1
6-1 and 16-2 are provided so as to protrude.

The rear shaft support portion 14 is provided substantially at the center in the width direction of the vehicle power train 4 and is provided to support the rear output shaft 18 so as to be directed rearward of the vehicle body. ) Is provided in communication with a rear propulsion shaft 20 for transmitting the driving force. Front first and second shaft supports 16-1 and 16-2
The front output shaft 2 is positioned outside one side in the width direction of the vehicle power train 4 and is directed forward of the vehicle body.
2, a front propulsion shaft 24 for transmitting driving force to a front wheel (not shown) is provided in communication therewith.

The reinforcing structure of the power train 4 for an automobile includes a portion of the transmission case 10 on the side near the engine 2, an intermediate portion of the transmission case 10, and the transfer case 1.
A stiffener 26 fastened to a portion of the second transmission case 10 adjacent to the transmission case 10 is provided.

FIG. 3 shows the power train 4 for an automobile.
-As shown in FIG. 4, the engine 2 of the transmission case 10
A powertrain side first mounting portion 28 is provided in a first transmission case portion 10-1 which is a near side portion, and a second transmission case portion 10- which is an intermediate portion of the transmission case 10 is provided.
2, a power train side second mounting portion 30 is provided so as to protrude, and a power train side third mounting portion 32 is provided in a first transfer case portion 12-1 which is a portion of the transfer case 12 near the transmission case 10.

The first and second mounting portions 28 on the power train side
The power train 30 is provided with power train side first and second mounting holes 34 and 36, respectively, so as to be directed outward on one side in the width direction of the vehicle power train 4. The powertrain-side third mounting portion 32 is provided with a powertrain-side third mounting hole 38 that is directed forward of the vehicle body of the vehicle powertrain 4.

As shown in FIGS. 5 to 8, the stiffener 26 has a substantially rectangular plate-like substrate portion 40 which is long in the longitudinal direction, and each of the side wall portions 4 which are opposed to each other on both sides in the width direction of the substrate portion 40.
Each of the side walls 42.
With the other end wall portions 46 fixed to the respective 44, a substantially box-shaped shape elongated in the longitudinal direction is formed, and a cross section in the width direction is formed in a substantially U-shape.

The stiffener 26 is provided with a stiffener-side first fastening portion 48 to be fastened to the power train-side first mounting portion 28 on the board portion 40 at one end in the longitudinal direction. Powertrain side second mounting part 3
The stiffener-side second fastening portion 50 fastened to the powertrain-side third mounting portion 32 is provided at the other end wall portion 46 at the other end in the longitudinal direction.
Is provided.

First and second fastening portions 48 and 50 on the stiffener side
The first and second mounting holes 34 on the powertrain side are respectively provided.
Stiffener side first and second fastening holes 54 that match 36
56 are provided so as to be directed to one outer side in the width direction of the power train 4 for a vehicle. Stiffener side third fastening part 5
2, a stiffener-side third fastening hole 58 that matches the powertrain-side third mounting hole 38 is provided so as to be directed forward of the vehicle body.

The stiffener 26 is, as shown in FIG.
The stiffener-side first fastening portion 48 at one end in the longitudinal direction is located and located above the stiffener-side third fastening portion 52 at the other end in the height direction in a side view of the vehicle power train 4 and fastened. Provided.

In the stiffener 26, the stiffener-side first fastening portion 48 at one end in the longitudinal direction is larger than the stiffener-side third fastening portion 52 at the other end in the longitudinal direction.
The stiffener-side third fastening hole 58 provided in the stiffener-side second fastening portion 50 at the longitudinally intermediate portion is bent and provided so as to be positioned on the upper side in the height direction in a side view.

As shown in FIG. 1, the stiffener 26 includes a first stiffener-side fastening portion 48 at one end in the longitudinal direction.
Than the stiffener-side third fastening portion 52 at the other end in the longitudinal direction,
The vehicle power train 4 is fastened by being positioned on the inner side in the width direction in plan view.

Further, the stiffener 26 is such that the stiffener-side first fastening portion 48 at one longitudinal end is wider than the stiffener-side third fastening portion 52 at the other longitudinal end in plan view of the vehicle power train 4. The stiffener-side third fastening hole 58 provided in the stiffener-side second fastening portion 50 at the middle portion in the longitudinal direction is bent and provided so as to be positioned inside in the direction.

Next, the operation will be described.

An engine 2 mounted upright on a vehicle body (not shown) of an automobile is connected to an automobile power train 4 including a transmission 6 and a transfer 8. In the power train 4 for an automobile, a transmission case 10 of a transmission 6 and a transfer case 12 of a transfer 8 are sequentially connected to an engine 2 so as to be directed to a rear side of a vehicle body.

The reinforcing structure of the vehicle power train 4 includes a portion of the transmission case 10 close to the engine 2, an intermediate portion of the transmission case 10 and the transfer case 1.
A stiffener 26 fastened to a portion of the second transmission case 10 adjacent to the transmission case 10 is provided.

The stiffener 26 is formed in the first to third fastening holes 5 of the stiffener side first to third fastening portions 48 to 52.
The first to third fastening bolts 60 to 64 are inserted into the first to third fastening bolts 60 to 64, respectively, and the first to third fastening bolts 60 to 64 are inserted into the power train side first to third mounting portions 28 to 32 respectively. By screwing into the third mounting holes 34 to 38,
First and second transmission case units 10-1 and 10-2 and first transfer case unit 1 of power train 4 for an automobile
2-1 and three points.

As described above, in the reinforcing structure of the automotive power train 4, the stiffener 26 is fastened to the transmission case 12 at three points: the portion near the engine 2, the intermediate portion, and the transfer case 12 near the transmission case 10. With this arrangement, the fastening distance of the stiffener 26 can be reduced as compared with the conventional two-point fastening, and by shortening the fastening distance, the strength of the stiffener 26 itself can be improved and the rigidity can be increased. By increasing the number of fastening points of the stiffener 26 to three points from the conventional two points, the vibration suppressing effect can be improved.

For this reason, the power train 4 for automobiles
Of the vehicle power train 4 without increasing the weight due to an increase in the thickness of the stiffener 26 itself.
Can be improved, and the vibration of the transfer 6 in the direction indicated by the arrow A in FIG. 1 can be further reduced.

As shown in FIG. 6, the stiffener 26 is provided by bending the stiffener-side third fastening hole 58 of the stiffener-side second fastening portion 50 at the middle portion in the longitudinal direction in a side view, as shown in FIG. As shown, the stiffener-side first fastening portion 48 at one end in the longitudinal direction is located higher than the stiffener-side third fastening portion 52 at the other end in the height direction in the side view of the power train 4 for an automobile. It is provided.

Further, as shown in FIG. 5, the stiffener 26 is provided by bending around a stiffener-side third fastening hole 58 of the stiffener-side second fastening portion 50 at a longitudinally intermediate portion in plan view, as shown in FIG. As shown in the figure, the stiffener-side first fastening portion 48 at one end in the longitudinal direction is located on the widthwise inner side in the plan view of the automotive powertrain 4 with respect to the stiffener-side third fastening portion 52 at the other end in the longitudinal direction. Provided.

Thus, the reinforcing structure of the automotive power train 4 not only can further reduce the vibration of the transfer 6 in the direction indicated by the arrow A in FIG. 1 but also can reduce the transfer in the direction indicated by the arrow B in FIG. 6 can also be reduced.

FIG. 9 shows a second embodiment of the present invention. The reinforcement structure of the automotive power train 4 according to the second embodiment includes a first transmission case section 10-1, a second transmission case section 10-2, and a first transfer case section 12.
1 is provided with a stiffener 66 formed in a substantially linear shape that is fastened to -1.

This stiffener 66 is the first stiffener side.
The power train 4 for an automobile is mounted such that the fastening portion 48 is positioned above the stiffener-side third fastening portion 52 in the height direction.
The first transmission case part 10-1, the second transmission case part 10-2, and the first transfer case part 12-1 are tilted at an angle θ with respect to the axis C in a side view of FIG.
The first and third fastening bolts 60 to 64 are used for fastening.

As described above, the reinforcing structure of the vehicle power train 4 of the second embodiment is provided by fastening the stiffener 66 at an angle θ with respect to the axis C of the vehicle power train 4. The vibration of the transfer 6 in the direction indicated by the arrow A in FIG. 1 can be further reduced, and the vibration of the transfer 6 in the direction indicated by the arrow B in FIG. 2 can be further reduced.

FIG. 10 shows a third embodiment of the present invention. The reinforcing structure of the vehicle power train 4 according to the third embodiment has a stiffener-side first fastening portion 4 at one longitudinal end.
8, a stiffener-side second fastening portion 50 is provided at an intermediate portion, and a pair of stiffener-side third fastening portions 52 are provided by branching off the other end in the longitudinal direction. Is provided.

The substantially Y-shaped stiffener 68 has a first shape.
The stiffener-side first and second fastening portions 48 are provided in the transmission case portion 10-1 and the second transmission case portion 10-2, respectively.
50 are fastened by first and second fastening bolts 60 and 62, respectively, and a pair of stiffener-side third fastening portions 52 and 52 are fastened to the first transfer case portion 12-1 by third fastening bolts 64 and 64, respectively. It is provided.

As described above, the reinforcing structure of the vehicle power train 4 according to the third embodiment has a pair of stiffener-side third fastening portions 52, 52 provided at the other end in the longitudinal direction of the stiffener 68. Since the stiffener 68 is fastened to the transfer case portion 12-1 at two points and the entire stiffener 68 is fastened at four points, the vibration of the transfer 6 in the direction indicated by the arrow A in FIG. 1 is further reduced. The vibration of the transfer 6 in the direction indicated by the arrow B in FIG. 2 can be further reduced.

FIG. 11 shows a fourth embodiment of the present invention. The reinforcing structure of the powertrain 4 for a vehicle according to the fourth embodiment has a pair of stiffener-side first fastening portions 48 provided at one end in the longitudinal direction, and a stiffener-side second fastening portion 50 provided at an intermediate portion. A pair of stiffener-side third fastening portions 52 is provided by branching off the other end in the longitudinal direction, and a stiffener 70 formed in a substantially X-shape is provided.

The substantially X-shaped stiffener 26 has a first shape.
A pair of first stiffeners is provided on the transmission case 10-1.
The first and second fastening portions 48 and 48 are fastened by first fastening bolts 60 and the second stiffener-side second fastening portion 50 is fastened to the second transmission case portion 10-2 by the second fastening bolts 62. Transfer case section 12-1
To the third stiffener side third fastening portions 52
It is provided by being fastened by fastening bolts 64.

As described above, the reinforcing structure of the power train 4 for an automobile according to the fourth embodiment has a pair of stiffener-side first fastening portions 48 provided at one end in the longitudinal direction of the stiffener 70 so as to extend in the longitudinal direction. A pair of stiffener-side third fastening portions 52 are provided at the other end in a branched manner, and the stiffener 70 is fastened to the first transmission case portion 10-1 and the first transfer case portion 12-1 at two points. Stiffener 7
By virtue of the fact that the whole 0 is fastened at five points, the vibration of the transfer 6 in the direction shown by the arrow A in FIG. 1 can be further reduced, and the vibration of the transfer 6 in the direction shown by the arrow B in FIG. It can be further reduced.

FIG. 12 shows a fifth embodiment of the present invention. The reinforcement structure of the automotive power train 4 of the fifth embodiment includes a first transmission case section 10-1, a second transmission case section 10-2, and a second transfer case section 1.
A stiffener 72 fastened to 2-2 is provided.

The stiffener 72 is provided with a stiffener-side first fastening portion 48 fastened by a first fastening bolt 60 to the powertrain-side first mounting portion 28 of the first transmission case portion 10-1. The stiffener-side second fastening portion 50 fastened by the second fastening bolt 62 to the second transmission case portion 10-2 of the second transfer case portion 10-2 is provided, and the front first shaft support portion 16 of the first transfer case portion 12-1 is provided.
−1, the second transfer case 12
The stiffener-side third fastening portion 52 that is fastened by the third fastening bolt 64 is provided on the front second shaft support portion 16-2.

As described above, the reinforcing structure of the automotive power train 4 of the fifth embodiment is different from that of the second transfer case in that the third stiffener-side third fastening portion 52 of the stiffener 72 has the maximum vibration in the direction indicated by the arrow A. Front second part of part 12-2
By extending and fastening to the shaft support 16-2, the vibration of the transfer 6 in the direction indicated by the arrow A in FIG. 1 can be further reduced, and the transfer in the direction indicated by the arrow B in FIG. 6 can also be reduced.

[0054]

As described above, the reinforcing structure for an automobile power train according to the present invention has a stiffener which is fastened to a portion near the engine and an intermediate portion of the transmission case and a portion near the transmission case of the transfer case. Thus, the rigidity of the stiffener itself can be increased by shortening the fastening distance of the stiffener than before, and the vibration suppression effect can be improved by increasing the number of fastening locations of the stiffener than before.

For this reason, the reinforcing structure of the vehicle power train can increase the rigidity of the vehicle power train without increasing the weight of the stiffener, and can further reduce the vibration of the transfer.

[Brief description of the drawings]

FIG. 1 is a plan view of a reinforcing structure of an automobile power train showing a first embodiment.

FIG. 2 is a side view of a reinforcing structure of a vehicle power train.

FIG. 3 is a side view of the vehicle power train before a stiffener is fastened.

FIG. 4 is a front view according to an arrow IV of FIG. 3;

FIG. 5 is a plan view of a stiffener.

FIG. 6 is a side view of a stiffener.

FIG. 7 is a rear view according to the arrow VII of FIG. 6;

FIG. 8 is a front view according to arrow VIII of FIG. 7;

FIG. 9 is a side view of a vehicle powertrain reinforcing structure according to a second embodiment.

FIG. 10 is a side view of a reinforcing structure of a power train for a vehicle, showing a third embodiment.

FIG. 11 is a side view of a reinforcement structure for a vehicle power train according to a fourth embodiment.

FIG. 12 is a plan view of a reinforcing structure of a power train for a vehicle, showing a fifth embodiment;

FIG. 13 is a plan view of an automobile power train.

FIG. 14 is a plan view of a reinforcement structure of a power train for an automobile, showing a conventional example.

[Explanation of symbols]

 Reference Signs List 2 internal combustion engine 4 automotive powertrain 6 transmission 8 transfer 10 transmission case 12 transfer case 26 stiffener 28 powertrain side first mounting part 30 powertrain side second mounting part 32 powertrain side third mounting part 48 stiffener side first fastening Part 50 Stiffener-side second fastening part 52 Stiffener-side third fastening part 60 First fastening bolt 62 Second fastening bolt 64 Third fastening bolt

Claims (6)

[Claims] 1. An automobile power train having an engine mounted and mounted on a vehicle body in a front-rear direction and a transmission and a transfer sequentially connected to the engine in a front-rear direction of the vehicle body. In the reinforcing structure, a stiffener fastened to a portion of the transmission case near the engine of the transmission, an intermediate portion of the transmission case, and a portion of the transfer case of the transfer near the transmission case is provided. Train reinforcement structure. 2. The vehicle power according to claim 1, wherein the stiffener is formed in a substantially box shape that is long in a longitudinal direction, and has a cross section in a width direction formed in a substantially U shape. Train reinforcement structure. 3. The motor vehicle according to claim 1, wherein the stiffener has one longitudinal end fastened to a portion near the engine of the transmission case closer to the engine than the other longitudinal end fastened to a portion near the transmission case of the transfer case. The vehicle powertrain reinforcement structure according to claim 1, wherein the powertrain is provided so as to be positioned at an upper side in a height direction and fastened in a side view of the powertrain. 4. The vehicle according to claim 1, wherein one end in the longitudinal direction of the stiffener fastened to a portion near the engine of the transmission case is closer to the engine than the other end in the longitudinal direction fastened to a portion of the transfer case near the transmission case. 4. The power train according to claim 3, wherein the power train is bent around a longitudinal middle portion fastened to the middle portion of the transmission case so as to be positioned in a height direction upper side in a side view of the power train. 5. Reinforcement structure for automotive powertrain. 5. The vehicle according to claim 1, wherein the stiffener has one longitudinal end fastened to a portion of the transmission case close to the engine, and one end in the longitudinal direction fastened to a portion close to the transmission case of the transfer case. The reinforcing structure for an automobile power train according to claim 1, wherein the power train is provided so as to be positioned and fastened inside in the width direction in a plan view of the power train. 6. The vehicle according to claim 5, wherein one end in a longitudinal direction of the stiffener fastened to a portion of the transmission case close to the engine is longer than another end of the transfer case fastened to a portion of the transfer case close to the transmission case. 6. The vehicle according to claim 5, wherein the power train is provided so as to be bent around an intermediate portion in a longitudinal direction fastened to an intermediate portion of the transmission case so as to be located inward in a width direction in a plan view of the power train. Powertrain reinforcement structure.