JP2525259Y2 - Automotive power unit support device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial application field) The present invention relates to a power unit for an automobile, which supports a power unit including an engine body and a transmission including a torque converter or a clutch mechanism and a transmission gear mechanism connected thereto. It relates to a support device.

(Prior Art) A power unit mounted on an automobile usually includes an engine body, and a transmission including a torque converter or a clutch mechanism and a transmission gear mechanism connected to one end of a crankshaft in the engine body. Both ends of a case (hereinafter, referred to as a first transmission case) accommodating a converter or a clutch mechanism are provided with a case (hereinafter, referred to as a second transmission) accommodating a side surface of one end of a crankshaft in an engine body and a transmission gear mechanism. (Hereinafter referred to as a case), the engine body, a torque converter or a clutch mechanism, and a transmission gear mechanism are connected in series to each other by bolts or the like, and are supported by a plurality of mount members. , Attached to the car body.

Such a plurality of mount members are generally formed, for example, as described in Japanese Utility Model Laid-Open Publication No. Sho 62-123421, as a front end of an engine body which is a front end of a power unit and a rear end of a power unit. 2 at the rear end of the transmission case and at the side of the power unit.

(Problems to be Solved by the Invention) As described above, in an automobile in which a power unit is mounted via a plurality of mounting members, bending is applied to the power unit due to an impact force accompanying explosive combustion in the engine. The resulting vibration caused by the bending is transmitted to the vehicle body via the mount member, thereby causing an undesirable vibration and noise in the vehicle body.

The analysis based on the computer simulation of the deformation and displacement of the power unit due to the bending that occurs in the power unit is performed by the inventor of the present application, and as described above, the engine body, the torque converter or the clutch mechanism, and the transmission gear mechanism are formed as described above. The horizontal power unit was used in which a torque converter or a clutch mechanism was housed in a first transmission case and a transmission gear mechanism was housed in a second transmission case. In such a computer simulation, the power unit P whose side and top surfaces are schematically shown by solid lines in FIGS. 4 and 5 is deformed by bending as shown by a dashed line in FIGS. 4 and 5. It has been confirmed that the deformation and the displacement are accompanied by the axis of symmetry T as shown in FIG. 4 and FIG. The power unit P is deformed by the first transmission case.
The coupling portion between C1 and the second transmission case C2 is the largest, the displacement of the power unit is greatest at the rear end of the second transmission case C2, and the axis of symmetry T is the engine body. It has been found that the upper part of E passes through a substantially middle part in the vertical direction from the upper part of the joint between the first transmission case C1 and the second transmission case C2. Thus, the connection between the first transmission case C1 and the second transmission case C2 has a relatively low rigidity, so that the displacement at the rear end of the second transmission case C2 And the first transmission case C1 and the second transmission case
It has been revealed that the displacement of the portion where the axis of symmetry T passes at the connection with C2 is relatively small.

As described above, the second transmission case C2 that causes a large displacement due to the bending of the power unit.
Since a mounting member is usually provided at the rear end,
If the vibration generated by such movement is increased, a problem arises in that large vibration and noise are generated in the vehicle body. Accordingly, for example, a reinforcing member is provided at a joint portion between the first transmission case C1 and the second transmission case C2 to increase the rigidity at that portion, so that the rear end portion of the second transmission case C2 is provided. It is conceivable that the displacement of the first transmission case C1 and the second transmission case C2 are reinforced in consideration of the above. The power unit provided with the member is not found.

4 and 5, the deformation and displacement of the power unit P to one side are shown, and the deformation and displacement to the other side are omitted.

In view of the above, the present invention provides a first transmission case and a second transmission case for mounting a power unit configured by connecting an engine body, a torque converter or a clutch mechanism, and a transmission gear mechanism in series to a vehicle body. Provided is a power unit support device for an automobile, in which rigidity of a coupling portion with a transmission case is increased, deformation due to bending is suppressed, and vibration and noise generated in a vehicle body can be reduced. With the goal.

(Means for Solving the Problems) In order to achieve the above object, a power unit support device for a vehicle according to the present invention accommodates a torque converter or a clutch mechanism connected to one end of a crankshaft in an engine body. A first transmission case,
And one end and the other end of the crankshaft, and both sides of the first transmission case, in a power unit including a second transmission case accommodating a transmission gear mechanism connected to a torque converter or a clutch mechanism. And a plurality of mount members connected to the vehicle body and disposed at a joint between the first transmission case and the second transmission case, and both ends of the first and second transmission cases are connected to the first and second transmission cases. A plurality of mount members provided on one end side of the crankshaft are mounted on the reinforcement member and connected to the vehicle body.

(Operation) In the power unit support device for an automobile according to the present invention having the above-described configuration, both ends of the reinforcing member are
By being coupled to the first transmission case and the second transmission case, respectively, the rigidity of the coupling portion between the first transmission case and the second transmission case is increased, and the deformation of such a portion Of the plurality of mount members that support the power unit, the one provided on one end side of the crankshaft is attached to the reinforcing member, and the arrangement position of the mount member is reduced in displacement due to bending of the power unit. Therefore, vibration transmitted to the vehicle body via the mount member is reduced.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

1 to 3 show an example of a power unit supporting apparatus for a motor vehicle according to the present invention, together with a horizontal power unit to which the apparatus is applied.

A power unit 10 shown in FIGS. 1 to 3 includes an engine body 15 having a cylinder head cover 11, a cylinder head 12, a cylinder block 13, and an oil pan 14, and a transmission connected to one end of a crankshaft of the engine body 15. The transmission 17 includes a torque converter or a clutch mechanism housed in a first transmission case 20 and a transmission gear mechanism housed in a second transmission case 22. It is configured. First transmission case
One end of the engine 20 is connected to one end of the crankshaft of the engine body 15 by a bolt, and the other end is connected to one end of the second transmission case 22 by a bolt. The first transmission case 20 also houses a differential gear device in a state of protruding to a side portion of the transmission 17, and the differential gear device has a pair of drive shafts 24 connected to left and right front wheels. , And 25 are connected to each other. The drive shaft 25 is longer than the drive shaft 24, and an intermediate portion thereof is supported by bearings 26 attached to the cylinder block 13 and the oil pan 13 by bolts.

Furthermore, a first transmission case 20 and a second transmission case
A saddle-shaped reinforcing member 30 is arranged on the upper surface side of the connection portion with 22. One end of the reinforcing member 30 is
A plurality of bolts B1 are provided on the upper surface of the first transmission case 20.
And the other end of the reinforcing member 30 is
Of the transmission case 22 are connected to each other by a plurality of bolts B2. Thus, the reinforcing member
30 is connected to the first transmission case 20 and the second transmission case 22 to increase rigidity at a connection portion between the first transmission case and the second transmission case 22. become.

Further, a first mount member 31 is disposed on the other end side of the crankshaft in the engine main body 15, and a second and a third mount member 32 are provided on both sides of the first transmission case 20.
33 are arranged in a state that they protrude outward.
The first and second mount members 32 and 33 each have a known configuration. Further, on the upper surface side of the reinforcing member 30, a fourth mount member 34 is provided. The fourth mounting member 34 includes a U-shaped transmission-side bracket 35 welded to the upper surface of the reinforcing member 30, a mounting support pin 36 that penetrates both ends of the transmission-side bracket 35 and is supported by the transmission-side bracket 35. A mount rubber 37 fitted to a portion of the mount support pin 36 protruding from one end of the transmission-side bracket 35, one end attached to the outer peripheral portion of the mount rubber 37, and the other end attached to the vehicle body 28. And the position of the fourth mounting member 34 is such that the displacement accompanying the bending of the power unit 10 is small. 2 and the vicinity of the axis of symmetry T shown in FIG. The power unit 10 is supported by the first to fourth mount members 31 to 34,
Connected to 28.

In the above-described example, the power unit support device applied to the power unit placed horizontally on the vehicle is shown. However, the power unit support device for the vehicle according to the present invention is not limited thereto, and is vertically mounted on the vehicle. It is needless to say that the present invention can be applied to the power unit that is used.

(Effects of the Invention) As is apparent from the above description, according to the power unit support device for a vehicle according to the present invention, the first transmission case and the second transmission, in which the deformation caused by the bending generated in the power unit is large. The portion where the displacement due to bending in the machine case is small, that is, the first
At the joint of the transmission case and the second transmission case,
A reinforcing member is provided, whereby the rigidity of such a portion is increased so that large deformation does not occur. Therefore, generation of vibration due to bending of the power unit is suppressed, and the reinforcing member is attached to the reinforcing member. The mounting position of the mounting member provided on one end side of the crankshaft is
Vibration transmitted to the vehicle body via one of the plurality of mount members provided on one end side of the crankshaft is reduced because it is located near the portion where displacement due to bending of the power unit is to be small. You. As a result, it is possible to effectively avoid a situation where large vibration and noise are generated in the vehicle body.

[Brief description of the drawings]

1 to 3 show a side view, a plan view and a rear view of an example of a power unit supporting apparatus for a motor vehicle according to the present invention, together with a power unit to which the apparatus is applied, and FIGS.
The figure is a diagram provided for explaining deformation and fluctuation due to bending in the power unit. In the figure, 10 is a power unit, 15 is an engine body, 17 is a transmission, 20 is a first transmission case, 22 is a second transmission case, 30 is a reinforcing member, 34 is a fourth mounting member, and T is It is the axis of symmetry.

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Hideko Goko 3-1, Shinchi, Fuchu-cho, Aki-gun, Hiroshima Prefecture Inside Mazda Co., Ltd. (56) References Full-fledged Sho 61-62323 (JP, U) 62-189231 (JP, U)

Claims (1)

(57) [Scope of request for utility model registration] A first transmission case accommodating an engine main body, a torque converter or a clutch mechanism connected to one end of a crankshaft in the engine main body;
In a power unit including a second transmission case accommodating a transmission gear mechanism connected to the torque converter or the clutch mechanism, one end side and the other end side of the crankshaft and the first transmission case. A plurality of mount members provided on both sides and connected to the vehicle body; and a plurality of mount members arranged at a joint between the first transmission case and the second transmission case, and both ends of the first and second transmission cases. And a reinforcing member to which one of the plurality of mount members provided on one end side of the crankshaft is attached and connected to the vehicle body. Power unit support device for automobiles.