JP4801680B2 - Power unit support structure - Google Patents

Description

  The present invention relates to a power unit in which a power unit is supported by connecting a mount bracket elastically supported by a mount insulator and a unit bracket provided on a power unit (a drive unit configured to include an engine and a transmission). This relates to the support structure.

  Conventionally, when a power unit is mounted on a vehicle body in a vehicle assembly conveyor composed of an upper line and a lower line, first, the power unit is pushed up into the engine room from below the vehicle body suspended on the upper line conveyor. Thus, the mount bracket 16 elastically supported by the mount insulator 11 on the vehicle body side is installed on the unit bracket 22 provided on the power unit side (see FIG. 7).

  At this time, the first through-bolt insertion hole 19 provided in the mount bracket 16 and the two second through-bolt insertion holes 27 and 27 provided in the unit bracket 22 are disposed substantially side by side in a substantially coaxial manner. 16 provided in the unit bracket 22 and the first vertical bolt insertion hole 21 provided in the first bracket 16 (the first vertical bolt insertion hole 21 is provided more distally than the first through bolt insertion hole 19 from the mount insulator 11). The second upper and lower bolt insertion holes 25 are configured so as to be vertically arranged substantially coaxially.

Then, the through bolt 18 is inserted into the first through bolt insertion hole 19 and the second through bolt insertion holes 227 and 27 to temporarily fix the power unit. In this state, the vehicle body and the power unit are conveyed to the conveyor on the lower line. The upper and lower bolts 20 are inserted into the first upper and lower bolt insertion holes 21 and the second upper and lower bolt insertion holes 25 from above the vehicle body to connect the mount bracket 16 and the unit bracket 22 to each other.
In addition, although it is actually implemented regarding the mounting operation | work to the vehicle body of such a power unit, the appropriate patent document which mentioned this point is not found.

However, as shown in FIGS. 7 and 8, in the above-described mounting operation of the power unit, after the through bolt 18 is attached on the upper line and the power unit is temporarily fixed to the vehicle body, the upper and lower bolts 20 are attached on the lower line. In addition, the power unit is suspended through the mount bracket 16.
As a result, the unit bracket 22 is lowered together with the power unit, and the mount bracket 16 tries to rotate counterclockwise in FIG. 7 with the through bolt 18 as a fulcrum. When the pressing force of 16a acts on the unit bracket 22, the unit bracket 22 and the mount bracket 16 may be deformed (in FIG. 8, the base 23a of the inner member 23 in the unit bracket 22 is deformed). Deformation is shown).

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a power unit support structure that can prevent deformation of a unit bracket and a mount bracket that may occur in a power unit mounting operation during vehicle assembly. It is in.

In order to achieve the above object, in the present invention,
In a state where the mount bracket elastically supported by the mount insulator is installed on the unit bracket provided on the power unit side,
The first through bolt insertion hole provided in the mount bracket and the second through bolt insertion hole provided in the unit bracket are disposed side by side in a substantially coaxial shape,
In the mount bracket, a first vertical bolt insertion hole provided farther from the mount insulator than the first through-bolt insertion hole and a second vertical bolt insertion hole provided in the unit bracket are arranged substantially vertically. Can be placed in
After the through bolt is inserted into the first through bolt insertion hole and the second through bolt insertion hole, the upper and lower bolts are inserted into the first upper and lower bolt insertion holes and the second upper and lower bolt insertion holes, and the mount bracket And the unit bracket can be connected,
A portion of the mount bracket on the first vertical bolt insertion hole side extends to an upper portion of a highly rigid portion in the vertical direction of the unit bracket.

[Action and effect]
According to the present invention, the portion of the mount bracket on the first vertical bolt insertion hole side (corresponding to the tip portion of the mount bracket) extends to the upper portion of the highly rigid portion in the vertical direction of the unit bracket.
Therefore, the pressing force against the unit bracket at the tip of the mounting bracket that occurs during the mounting operation of the power unit described above also reaches the highly rigid part in the vertical direction of the unit bracket, and the pressing force is in the highly rigid part in the vertical direction of the unit bracket. As a result, the unit bracket and the mounting bracket can be prevented from being deformed due to the point that is supported by the unit and the load applied per unit area of the unit bracket is reduced because the pressing force is dispersed. It is also possible to prevent displacement due to bending or the like when the first vertical bolt insertion hole of the bracket and the second vertical bolt insertion hole of the unit bracket are assembled.
Needless to say, the present invention is effective not only in the deformation of the bracket during the power unit mounting operation but also in the prevention of the deformation of the bracket with respect to the vertical direction input during traveling of the vehicle.

Embodiment
Hereinafter, an embodiment of a vehicle 1 according to the present invention will be described based on the drawings with a focus on the contents related to a transmission mount 8 that is a characteristic configuration of the vehicle 1 according to the present invention.

  The vehicle 1 according to the present invention includes a power unit 2 support structure (one example) and a transmission mount 8 described below.

(Power unit support structure)
Based on FIG. 1, an example of the support structure of the power unit 2 in the vehicle 1 which concerns on this invention is demonstrated.
FIG. 1 is a plan view schematically showing an example of a support state of a power unit 2 in a vehicle 1 according to the present invention. 1 is the front-rear direction of the vehicle body 1 (the left side of the drawing is the front side of the vehicle body 1), and the vertical direction of the drawing is the left-right direction of the vehicle body 1 (the upper side of the drawing is the right side of the vehicle 1).

As shown in FIG. 1, the power unit 2 includes an engine 3 and a transmission 4.
In the power unit 2, the upper right side of the engine 3 is supported by the right side member 5 of the vehicle body via the engine mount 7, and the upper left side of the transmission 4 is supported by the left side member 6 of the vehicle body via the transmission mount 8. With this configuration, the power unit 2 is elastically supported in the left-right direction of the vehicle body. Further, the torque rod 10 that restricts the displacement of the engine 3 in the roll direction and the front-rear direction is attached across the lower portion of the engine 3 of the power unit 2 and the front suspension member 9.

(Transmission mount)
Next, the transmission mount 8 that supports the transmission 4 of the power unit on the vehicle body will be described with reference to FIGS.
2 is an exploded perspective view of the transmission mount 8, FIG. 3 is a plan view of the transmission mount 8, and FIG. 4 is a partially cutaway view of the side surface of the transmission mount 8 when viewed from the power unit side.

  As shown in FIGS. 2 to 4, the transmission mount 8 includes a mount insulator 11, a mount bracket 16, and a unit bracket 22 described below.

(1) Mount insulator As shown in FIG.2 and FIG.4, the mount insulator 11 has the ring-shaped support part 12 to which the anti-vibration rubber | gum 14 which has the insertion hole 14a is being fixed inside, and several bolt hole 28a. The mounting arm portion 13 is fixed to the left side member 6 of the vehicle body by a bolt 15a.

(2) Mount Bracket As shown in FIG. 2, the mount bracket 16 includes an insertion portion 17 that can be inserted into the insertion hole 14 a of the anti-vibration rubber 14, a first through bolt insertion hole 19 through which the through bolt 18 can be inserted, and The first upper / lower bolt insertion hole 21 into which the upper / lower bolt 20 can be inserted is provided, and the mount bracket 16 is elastically supported by the mount insulator 11 by inserting the insertion portion 17 into the insertion hole 14a of the vibration isolating rubber 14. It is configured as follows. The first upper / lower bolt insertion hole 21 is provided farther from the mount insulator 11 than the first through bolt insertion hole 19.
Also, as shown in FIGS. 3 and 4, the width of the tip portion 16b of the mount bracket 16 (the portion on the first vertical bolt insertion hole side in the mount bracket) is the base of the inner member 23 of the unit bracket 22 described below. It has approximately the same length as the width of 23a. That is, the front end portion 16 b of the mount bracket 16 extends to the upper portion of the vertical wall portion 23 b (the highly rigid portion in the vertical direction of the unit bracket) of the inner member 23 of the unit bracket 22.

(3) Unit Bracket As shown in FIGS. 2 to 4, the unit bracket 22 includes an inner member 23 and an outer member 24 having a U-shaped cross section, and the inner member 23 and the outer member 24 open to each other. The inner member 23 is disposed in the outer member 24 so as to be in contact with each other and connected by welding.

  The inner member 23 has a base portion 23a and two vertical wall portions 23b, 23b that are vertically erected from the base portion 23a. A second upper and lower bolt insertion hole 25 into which the upper and lower bolts 20 can be inserted into the base portion 23a. Is provided so that the mount bracket 16 can be installed on the upper surface of the base portion 23a. A female screw 26 (see FIG. 4) having a female screw hole communicating with the second upper and lower bolt insertion hole 25 is welded to the lower surface of the base portion 23a of the inner member 23.

  The outer member 24 has a base portion 24a and two vertical wall portions 24b and 24b that are vertically provided from the base portion 24a. The through bolts 18 can be inserted into the two vertical wall portions 24b and 24b, respectively. Second through bolt insertion holes 27, 27 are provided substantially coaxially. The base 24a of the outer member 24 is provided with a plurality of bolt holes 28b (see FIGS. 3 and 4). The outer member 24 is connected to the left side of the transmission 4 by the bolts 15b (see FIGS. 3 and 4). It is comprised so that it can fix to upper part.

(Transmission mount connection operation)
The operation of connecting the transmission mount 8 described above when the power unit 2 is mounted on the vehicle body in a vehicle assembly conveyor composed of an upper line and a lower line will be described.
First, the power bracket 2 is pushed up into the engine room from below the vehicle body suspended on the upper line conveyor, whereby the mount bracket 16 elastically supported by the vehicle body side mount insulator 11 is attached to the outer member 24 of the unit bracket 22. It arrange | positions between these vertical wall parts 24b and 24b, and installs on the base 23a of the inner side member 23 (refer FIG. 2).

  At this time, a first through bolt insertion hole 19 provided in the mount bracket 16 and two second through bolt insertion holes 27, 27 provided in the vertical wall portions 24b, 24b of the outer member 24 of the unit bracket 22 are formed. The first upper and lower bolt insertion holes 21 of the mounting bracket 16 and the second upper and lower bolt insertion holes 25 of the unit bracket 22 are arranged vertically in a substantially coaxial manner. ing.

Then, the through bolt 18 is inserted into the first through bolt insertion hole 19 and the second through bolt insertion hole 27 to temporarily fix the power unit 2.
In this temporarily fixed state, as shown in FIG. 5, the tip portion 16 b of the mount bracket 16 (the portion on the first vertical bolt insertion hole side in the mount bracket) is the vertical wall portion 23 b (unit of the inner member 23 of the unit bracket 22. The upper pressing force of the mounting bracket tip portion 16b with the through bolt 18 generated by the load of the power unit as a fulcrum against the inner member 23 is exerted on the inner member 23. Not only the base portion 23a but also the vertical wall portion 23b reaches the point where the pressing force is supported by the vertical wall portion 23b of the unit bracket 22 and the per unit area of the base portion 23a because the pressing force is dispersed. As a result, the unit bracket 22 and the mount bracket 16 can be reduced due to the reduced load. It is possible to prevent the form. Needless to say, the present invention is effective not only in the deformation of the unit bracket 22 and the mount bracket 16 during the power unit mounting operation but also in the deformation prevention of these brackets in the vertical direction input during vehicle travel.

  Next, in this temporarily fixed state, the vehicle body and the power unit 2 are conveyed to the conveyor on the lower line, and this time, the upper and lower bolts 20 are inserted into the first upper and lower bolt insertion holes 21 and the second upper and lower bolt insertion holes 25 from above the vehicle body. (In the present invention, since the displacement due to bending or the like during assembly of the first vertical bolt insertion hole 21 and the second vertical bolt insertion hole 25 can be prevented, the vertical bolt 20 is connected to the first vertical bolt insertion hole. 21 and the second upper / lower bolt insertion hole 25), and the male screw portion of the upper / lower bolt 20 is screwed into the female screw 26 of the inner member 23 of the unit bracket 22 and fastened, and the through bolt 18 inserted therethrough is inserted. Are fastened with a nut 29 to connect the mount bracket 16 and the unit bracket 22 together.

[Another embodiment]
[1] The configuration of the transmission mount 8 in the above-described embodiment may be applied to the configuration of the engine mount 7.
[2] The configuration of the transmission mount 8 in the above-described embodiment can be applied to both MT vehicles and AT (CVT) vehicles.
[3] As shown in FIG. 6, the high rigidity portion of the unit bracket 22 in the above-described embodiment is provided in the portion where the tip portion 16b of the mount bracket 16 is disposed in the base portion 23a of the inner member 23. May be configured.
[4] The front end portion 16b of the mount bracket 16 in the above-described embodiment is configured integrally with the mount bracket 16, but the front end portion 16b may be provided separately from the mount bracket 16.

The top view which showed roughly an example of the support state of the power unit in the vehicle which concerns on this invention Exploded perspective view of transmission mount Top view of transmission mount Partial cutaway view of the side of the transmission mount from the power unit side Longitudinal section when the transmission mount in the temporarily fixed state is viewed from the power unit side The perspective view (a) and longitudinal cross-sectional view (b) which show another embodiment of the unit bracket in the vehicle which concerns on this invention Exploded perspective view of conventional truss mission mount Longitudinal sectional view of a conventional transmission mount in the temporarily fixed state as seen from the power unit side

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Vehicle 2 Power unit 3 Engine 4 Transmission 5 Right side member 6 Left side member 7 Engine mount 8 Transmission mount 9 Front suspension member 10 Torque rod 11 Mount insulator 12 Ring-shaped support part 13 Mounting arm part 14 Anti-vibration rubber 15 Bolt 16 Mount bracket 16b Tip portion (the portion on the first vertical bolt insertion hole side of the mount bracket)
17 Insertion portion 18 Through bolt 19 First through bolt insertion hole 20 Upper / lower bolt 21 First upper / lower bolt insertion hole 22 Unit bracket 23 Inner member 23a Base portion 23b Vertical wall portion (high rigidity portion of the unit bracket in the vertical direction)
24 Outer member 24a Base 24b Vertical wall 25 Second upper and lower bolt insertion hole 26 Female screw 27 Second through bolt insertion hole 28 Bolt hole 29 Nut 30 Beat part

Claims (1)

In a state where the mount bracket elastically supported by the mount insulator is installed on the unit bracket provided on the power unit side,
The first through bolt insertion hole provided in the mount bracket and the second through bolt insertion hole provided in the unit bracket are disposed side by side in a substantially coaxial shape,
In the mount bracket, a first vertical bolt insertion hole provided farther from the mount insulator than the first through-bolt insertion hole and a second vertical bolt insertion hole provided in the unit bracket are arranged substantially vertically. Can be placed in
After the through bolt is inserted into the first through bolt insertion hole and the second through bolt insertion hole, the upper and lower bolts are inserted into the first upper and lower bolt insertion holes and the second upper and lower bolt insertion holes, and the mount bracket And the unit bracket can be connected,
A power unit support structure, wherein a portion of the mount bracket on the first vertical bolt insertion hole side extends above a highly rigid portion in the vertical direction of the unit bracket.

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