CN100415555C

CN100415555C - Engine rack structure

Info

Publication number: CN100415555C
Application number: CNB2005100662440A
Authority: CN
Inventors: 樱井宽己
Original assignee: Mitsubishi Motors Corp
Current assignee: Mitsubishi Motors Corp
Priority date: 2004-04-30
Filing date: 2005-04-25
Publication date: 2008-09-03
Anticipated expiration: 2025-04-25
Also published as: JP4296987B2; CN1693731A; TW200535024A; TWI276559B; JP2005313829A

Abstract

The invention provides an engine mount structure capable of improving the joint rigidity of a side member and a cross member while suppressing the increase of the weight and cost. The engine mount structure is mounted to an engine 12 arranged between the side members so as to straddle between a pair of side members 2 and 3 that are arranged at an interval in the vehicle width direction W and extend in the longitudinal direction of a vehicle 1 and the cross member 5 of which both end 5a and 5b sides are fixed to respective side members. Engine mount brackets 20 and 21 where engine mount insulators 14 and 15 for elastically supporting the engine are mounted to receiving surfaces 203 and 213 are fixed to the side members 2 and 3 and the cross member 5, and the engine mount insulators 14 and 15 are mounted to receiving surfaces 203 and 213 to support the engine 12.

Description

Engine rack structure

Technical field

The present invention relates to a kind of structure with the engine bed of engine installation on vehicle body.

Background technology

On driving engine, be equipped with and be used for the engine bed vibration isolating pad that elasticity keeps driving engine and absorbs vibration when driving engine is loaded into vehicle body, this engine bed vibration isolating pad is installed in the side of the driving engine that is positioned at the vehicle both sides.As the engine mounting bracket of this engine bed vibration isolating pad installation side, generally be fixed on to be positioned on the overall width direction and to constitute on a pair of curb girder of vehicle frame or be fixed on its two ends and be fixed on crossbeam on these curb girders some.For example, in the Japanese documentation 1, put down in writing the structure that engine mounting bracket is fixed on crossbeam.

Japanese documentation 1: Japanese kokai publication hei 6-255378

In the engine rack structure shown in the Japanese documentation 1, be connected on the crossbeam engine mounting bracket also fixing.But, at engine mounting bracket and connect on the position of this support, not only bear the weight of driving engine, and drive driving engine and the rotary torque that produces also puts on this as moment of torsion, therefore, require to improve rigidity (connection rigidity) is installed.And, if the suspension crossbeam of suspension is installed, because other crossbeam of input load ratio is bigger, so, just require higher installation rigidity (connection rigidity).

In order to improve the installation rigidity, general method is the thickness of slab that increases strengthening part, changes material or shape and increase material.But any method all can't directly be used existing parts, thereby causes the increase of cost, weight.

For driving engine is assemblied on the vehicle, under with the state after monomer driving engine or the change-speed box assembling, when the top of vehicle frame makes it fall into vehicle frame, carry out the position adjustment,, and both are fixed so that the engine bed vibration isolating pad drops on the engine mounting bracket.But, in case the engine bed vibration isolating pad is installed on the engine mounting bracket, just must once more driving engine be raised up in order to carry out the position adjustment thereafter, therefore, consider the problem of operation, optimal way is the accuracy of positioning that improves when installing.

Summary of the invention

The object of the present invention is to provide a kind of when control weight and cost increase, can improve the vehicle frame aspect intensity, be curb girder is connected rigidity with crossbeam engine rack structure.

For achieving the above object, according to engine rack structure of the present invention, engine mounting bracket is fixed in curb girder and crossbeam, so that its configuration and a pair of curb girder that extends along the fore-and-aft direction of vehicle and its two ends are separately fixed on the crossbeam on each curb girder at certain intervals on the overall width direction, simultaneously, by being installed, the engine bed vibration isolating pad keeps driving engine on carrying surface.Wherein, be installed on the driving engine that is configured between the curb girder and elasticity keeps the engine bed vibration isolating pad of driving engine to be installed on the carrying surface.

And, be that suspension, the bigger suspension crossbeam of input load are installed as crossbeam.On the carrying surface of engine mounting bracket top setting, be provided with than carrying surface further to outstanding engagement section, vehicle top.

According to the present invention, with engine mounting bracket on curb girder that constitutes vehicle frame and crossbeam and be fixed on these two kinds of beams, wherein, engine mounting bracket is used to install the engine bed vibration isolating pad that keeps being installed on driving engine, therefore, engine mounting bracket is being brought into play the effect as driving engine holding member and strengthening part, can improve the rigidity that is connected of curb girder and crossbeam when suppressing the increase of weight or cost.

On the carrying surface on the top that is arranged at the engine mounting bracket that the engine bed vibration isolating pad is installed, be provided with than this carrying surface further to outstanding engagement section, vehicle top, therefore, when the engine bed vibration isolating pad is installed, control the position of this vibration isolating pad by the engagement section, thereby can improve the accuracy of positioning when installing, improve operation.

Description of drawings

Fig. 1 represents the planar view of body frame structure for automotive according to an embodiment of the invention;

Fig. 2 is the enlarged drawing of expression as the connecting portion structure of the engine mounting bracket of main portion of the present invention, curb girder, crossbeam;

Fig. 3 is the exploded perspective view of expression engine mounting bracket structure;

Fig. 4 is the enlarged drawing of the connecting portion of the engine mounting bracket seen from the vehicle body middle position, curb girder, crossbeam;

Fig. 5 is the block diagram that expression is equipped with the driving engine overview of engine bed vibration isolating pad; And

Fig. 6 is the enlarged drawing of one of expression engine bed vibration isolating pad structure.

The specific embodiment

With reference to accompanying drawing to describing according to embodiments of the invention.As shown in Figure 1, on the overall width direction of representing with symbol W, dispose the

curb girder

2,3 that the fore-and-aft direction of a pair of vehicle of representing along arrow Y 1 extends.Be separately fixed on the

curb girder

2,3 by the both end sides of welding, thereby constitute vehicle frame 11 a plurality of crossbeams 4～10.In the middle of these crossbeams, constitute front cross rail by crossbeam 4 respectively, crossbeam 10 constitutes after cross member.As shown in Figure 2, be positioned at more outstanding from

curb girder

2,3 on the overall width direction than two ends 5a, the 5b of the crossbeam 5 of crossbeam 4 more close rear view of vehicle sides.The traveller portion (not shown) of front suspension is installed on this outstanding two

ends

5a, 5b, plays a role as the suspension crossbeam.The

crossbeam

8,9 that is positioned at than crossbeam 10 more close vehicle fronts plays a role as the rear suspension crossbeam that supports rear suspension.

Curb girder

2,3 is weldingly fixed on section for the external component 2a of " コ " font, the inside of 3a with section for internal part 2b, the 3b of " コ " font, so that both sides' open side is relative, and forms the closed sectional structure.Therefore, externally near the connecting portion of

parts

2a, 3a and

internal part

2b, 3b, on the full week of

curb girder

2,3, forming thickness is the

end difference

30,31 of the sheet metal thickness of external component 2a, 3a.In the present embodiment, between

end difference

30,31 and crossbeam 5, insert

link

32,33 respectively, and be welded in

internal part

2b, 3b and crossbeam 5, be connected area with the increase Joint strenght between

curb girder

2,3 and the crossbeam 5 thereby increase.

Link

32,33 only with

engine mounting bracket

20,21 opposed scopes described later in, promptly only be equivalent to insert in the scope of the width of

engine mounting bracket

20,21 on fore-and-aft direction Y, fitting limit is limited in Min..

On vehicle 1, as shown in Figure 5, the driving engine 12 of having assembled change-speed box 13 in advance is installed between curb girder 2,3.Front and back in the side relative with

curb girder

2,3 of this driving engine 12 are separately installed with and are used for the pair of right and left engine bed

vibration isolating pad

14,15 and 16,17 that elasticity keeps driving engine 12.The engine bed

vibration isolating pad

16,17 at rear is mounted respectively on the support 18 that is fixedly welded on the crossbeam 6.On crossbeam 7, be provided with the change-speed box support 19 that is used to install change-speed box 13.

The engine bed

vibration isolating pad

14,15 in the place ahead is kept by Fig. 1,

engine mounting bracket

20,21 shown in Figure 2 respectively.Because the structure of engine bed

vibration isolating pad

14,15 is identical, so, below only its structure is described with wherein an engine bed vibration isolating pad 14.In Fig. 6, the numeral in () is corresponding to the symbol of the structural portion of engine bed vibration isolating pad 15.

Engine bed vibration isolating pad 14 (15) comprising: cup-shaped hill holder 142 (152) is installed to driving engine 12 used bolts 141 (151) and connects on it; Rubber block 143 (153), its performance is as the effect of padded coaming; And, adapter plate 144 (154).The face 143a (153a), the 143b (153b) that are positioned at mutual opposite location form as a whole with adapter plate 144 (154), stay bearing plate 145 (155), and utilize bolt 141 (151) that stay bearing plate 145,155 is connected in hill holder 142 (152), thus, rubber block 143 (153) is installed as vibration isolating pad.For adapter plate 144 (154), as shown in Figure 5, form almost diamond, on the end that is positioned at fore-and-aft direction Y, form the mounting hole 14a (15a) that

engine mounting bracket

20,21 is installed.

Dispose

engine mounting bracket

20,21 respectively, so that it is respectively across on

curb girder

2,3 and crossbeam 5, and form respectively and side 2c, the 3c of

curb girder

2,3 and the contacted shape of

top

5c, 5d that is positioned at crossbeam 5 both sides, link together with

side

2a, 3a and top 5c, 5d by welding.Because the shape of

engine mounting bracket

20,21 is identical, so, below only the engine mounting bracket 20 by wherein its structure is described.In Fig. 3,4, the numeral in () is corresponding to the symbol of the structural portion of engine mounting bracket 21.

Engine mounting bracket 20 (21) is a metallic, comprising: main part 201 (211), be configured in stay bearing plate 202 (212) in the middle of the main part 201 (211), and load bearing component 204 (214).Wherein, load bearing component 204 (214) is installed in the top of main part 201 (211), forms the carrying surface 203 (213) of carrying engine bed

vibration isolating pad

14,15.

It is the shape of " コ " font that main part 201 (211) forms section, and its open side is configured to towards the vehicle body center side.On the sidewall opposite one another 205 (215), 206 (216) of main part 201 (211), form welding lip portions 207a (217a), 207b (217b) respectively.Be formed obliquely the upper surface 201c (211c) of main part 201 (211) so that support this when being fixed in

curb girder

2,3 and crossbeam 5, form down towards the vehicle body center side.On near the sidewall 205 (215), 206 (216) that is positioned at

curb girder

2,3 and crossbeam 5 opposed, form recess 205a (215a), 206a (216a) respectively.These recesses are avoided the interference with link shown in Figure 2 32,33 respectively, and prevent the phenomenon of the junction minimizing of main part 201 (211) and crossbeam 5.

Stay bearing plate 202 (212) have and sidewall 205 (215), 206 (216) between the roughly the same width in interval, by its both sides 202a (212a), 202b (212b) being weldingly fixed on the inner face of sidewall 205 (215), 206 (216) respectively, make each main part constitute prism.

Load bearing component 204 (214) forms the plane octagonal shape, goes up in its lower section to form lip portions 204a (214a).On the sidewall 205 (215), 206 (216) and the back side 208 (218) that this lip portions 204a (214a) are welded on main part respectively, load bearing component 204 (214) is fixed on the top of each prism-shaped main part down obliquely towards vehicle body central authorities.

On the end of the load bearing component 204 (214) that is positioned at fore-and-aft direction Y, be formed with mounting hole 209a (219a), the fastening nut again of in this mounting hole 209a (219a) and mounting

hole

14a, 15a shown in Figure 5, packing into behind the not shown bolt, thus engine bed

vibration isolating pad

14,15 is installed on the carrying surface 203,213.On the 204b of lower rims portion (214b), the 204c (214c) of the carrying surface 203 (213) that is positioned at fore-and-aft direction Y, be respectively arranged with as than carrying surface 203 (213) further to a plurality of claw portion 210 (220) of outstanding engagement section, vehicle top.In the present embodiment, as the engagement section, a pair of claw portion 210 (220) is arranged at 204b of lower rims portion (214b) and the 204c of lower rims portion (214c) respectively, still, also can be from the 204b of lower rims portion (214b) up to lower rims portion 204c (214c) continuous always a claw portion.

According to this structure, engine bed

vibration isolating pad

14,15 is installed on driving engine 12, as shown in Figure 2, for make the

engine mounting bracket

20,21 that keeps from the below across side 2c, the 3c of the

curb girder

2,3 that constitutes vehicle frame 11 and be positioned at crossbeam 5 both sides above 5c, 5d, and it is connected on these two beams by welding, therefore, the effect that

engine mounting bracket

20,21 has as driving engine 12 holding members, and play a role as the strengthening part of the installation rigidity that improves

curb girder

2,3 and crossbeam 5.Therefore, just needn't re-use strengthening part as prior art, and, when suppressing the increase of weight or cost, can also improve the rigidity that is connected of

curb girder

2,3 and crossbeam 5.In Fig. 4, symbol P represents weld nugget.

Be arranged on the carrying surface 203,213 on

engine mounting bracket

20,21 tops, on fore-and-aft direction Y, be provided with the claw portion 210,220 of further above vehicle, giving prominence to respectively than this carrying surface, therefore, when driving engine 12 is packed into, become the sign of location above vehicle frame 11.When the position of aiming at both descends driving engine 12, the adapter plate 144 (154) of engine bed

vibration isolating pad

14,15 moves downwards along bevelled carrying surface 203,213, contact and stops afterwards with claw portion 210,220 on being arranged on the 204b of lower rims portion (214b).Promptly, engine bed

vibration isolating pad

14,15 is by position on claw portion 210, the 220 control descent directions and the position on the fore-and-aft direction Y, the accuracy of positioning in the time of can improving installation.

Bolt 240 (241) is inserted in each mounting hole of mounting hole 209a, the 219a of mounting hole 14a, the 15a of engine bed vibration isolating pad aspect and support aspect, and be screwed into not shown nut, thus, engine bed

vibration isolating pad

14,15 is mounted respectively on

engine mounting bracket

20,21, and driving engine 12 also remains on the vehicle frame 11 along with engine bed

vibration isolating pad

16,17 is mounted together.

In the present embodiment,

engine mounting bracket

20,21 is fixed in the junction of the crossbeam 5 that bears the input that comes from the suspension side and the

curb girder

2,3 that is used to be connected this crossbeam 5, realized three in oneization, therefore, not only can improve the rigidity of vehicle frame 11, can also improve the installation rigidity of suspension and the installation rigidity of driving engine 12 relatively.

Symbol description

1 vehicle

2,3 a pair of curb girders

5 crossbeams (suspension crossbeam)

The both end sides of 5a, 5b crossbeam

12 engines

14,15 engine support vibration isolators

20,21 engine mountings bracket

203,213 carrying surfaces

210,220 engagement sections

W overall width direction

The Y fore-and-aft direction

Claims

1. engine rack structure comprises:

A pair of curb girder, configuration and extend at certain intervals on the overall width direction along the vehicle fore-and-aft direction;

Crossbeam, its both end sides are individually fixed on described each curb girder;

The engine bed vibration isolating pad is installed on the driving engine that is configured between the described curb girder, and elasticity keeps this driving engine; And

Engine mounting bracket is fixed on described each curb girder and the described crossbeam so that it on described curb girder and described crossbeam, has the carrying surface in the face of the engine bed vibration isolating pad at an upper portion thereof,

It is characterized in that,

On described carrying surface, install and keep described engine bed vibration isolating pad.

2. engine rack structure according to claim 1 is characterized in that: described crossbeam is the suspension crossbeam that suspension is installed.

3. engine rack structure according to claim 1 and 2 is characterized in that: described carrying surface is provided with the engagement section of further giving prominence to than this carrying surface above vehicle.

4. engine rack structure according to claim 1, it is characterized in that, described engine bed vibration isolating pad is set at the overall width direction both sides of described driving engine respectively, along with described driving engine is moved downwards towards vehicle frame, described engine bed vibration isolating pad is aligned with each other the position at the described carrying surface of overall width direction and bevelled and also contacts.