CN103072439A

CN103072439A - Suspension device

Info

Publication number: CN103072439A
Application number: CN201210419444XA
Authority: CN
Inventors: 吉村元伸; 松山阳司; 池田聪; 茅原学; 松本光贵; 丸山和宏
Original assignee: Nissan Motor Co Ltd
Current assignee: Nissan Motor Co Ltd
Priority date: 2011-10-26
Filing date: 2012-10-26
Publication date: 2013-05-01
Anticipated expiration: 2032-10-26
Also published as: CN103072439B; JP2013091416A; JP6203993B2

Abstract

The present invention provides a suspension device which is used for improving position accuracy of each connecting rod in a multiple-connecting-rod suspension relative to a vehicle body. A back suspension crossbeam (21) is connected with a rear axle housing (11) through an back upper connecting rod (19), a front lower connecting rod (25), a back lower connecting rod (23) and a radius rod (27). In a condition that no load is applied for a rear suspension device (1), tension is generated on the front lower connecting rod (25) and the back lower connecting rod (23). Furthermore mounting bracket parts at ends of the connecting rods are fastened in the condition. When generation of tension is required, the front lower connecting rod (25) utilizes a cam mechanism (11) for adjusting an outer inclination angle, and the back lower connecting rod (23) utilizes a cam mechanism (29) for adjusting a front inclination angle.

Description

Draft hitch

Technical field

The present invention relates to a kind of draft hitch with multi-link lever suspension fork.

Background technology

In the past, as the draft hitch with multi-link lever suspension fork, known had following patent documentation 1 a described content.

Patent documentation 1: No. 4195208 communique of TOHKEMY

But such draft hitch with multi-link lever suspension fork is by improving each connecting rod with respect to the positional precision of vehicle body, and the vehicle performance such as riding stability is further raise.

Summary of the invention

Therefore, the object of the invention is to improve each connecting rod in the multi-link lever suspension fork with respect to the positional precision of vehicle body.

The invention is characterized in, draft hitch is not being applied under the state of car load, the tension force that the tension force that front lower link is applied for the adjustment component of utilizing camber angle adjustment usefulness and the adjustment component of utilizing angle of toein adjustment usefulness apply rear lower link, produce wherein at least one tension force, produce under tension state the installation component of each end of each connecting rod and radius bar fastening at this.

Adopt the present invention, draft hitch is not being applied under the state of car load, at least one connecting rod in front lower link and rear lower link produces tension force, produce under the tension state at this, because will carry out fastening to the installation component of the end that is set in each connecting rod, radius bar, so installation component applied in advance under the state of load fastening, thereby can improve each connecting rod, radius bar with respect to the positional precision of suspension crossbeam.At this moment, owing to can under the state of mounting tyre, wheel rim on the wheel, not carry out the link operation of each connecting rod, radius bar, so workability improves.

Description of drawings

Fig. 1 is the back view of seeing from rear view of vehicle of back suspension device of left rear wheel side of the vehicle of expression one embodiment of the present invention.

Fig. 2 is the block diagram of left rear wheel periphery of the back suspension device of presentation graphs 1.

Fig. 3 is the birds-eye view of left rear wheel periphery of the back suspension device of presentation graphs 1.

Fig. 4 is the lateral plan of left rear wheel periphery of the back suspension device of presentation graphs 1.

Fig. 5 is the A-A cutaway view among Fig. 1.

Fig. 6 is illustrated in the Action Specification figure that produces the operation of tension force in front lower link in the back suspension device of Fig. 1 and the rear lower link, (a) of Fig. 6 is illustrated in the state that produces tension force in the front lower link, (b) of Fig. 6 is illustrated in the state that produces tension force in the rear lower link, (c) of Fig. 6 is illustrated under the state that produces tension force in front lower link and the rear lower link, produces the state of compressive force in radius bar (radius rod).

The specific embodiment

Below based on the description of drawings embodiments of the present invention.

Fig. 1～Fig. 4 represents the back suspension device 1 of one embodiment of the present invention.In addition, in this Fig. 1～Fig. 4, illustrate the back suspension device 1 of left side trailing wheel 3, but the back suspension device of right side rear wheel also is identical with the basic structure of the back suspension device of left side trailing wheel, therefore, only the back suspension device 1 corresponding with left side trailing wheel 3 is described.Above-mentioned left and right sides trailing wheel consists of wheel.

Trailing wheel 3 has wheel hub 5, at wheel hub 5 brake disc 7 is installed.Reference numeral 9 is brake clamps of braking for to brake disc 7.Dispose the rear-axle casing 11 as axle housing in the vehicle-width direction inboard of wheel hub 5, semiaxis 13 can counterrotating mode support rear semiaxis 13 after it.The urceolus lower end that links bumper 15 at rear-axle casing 11, the inner core upper end of bumper 15 is linked to vehicle body.Reference numeral 17 among Fig. 3 is coil springs.In addition, brake disc 7 and brake clamp 9 in Fig. 1, Fig. 4, have been omitted.

Upper end at rear-axle casing 11, by the 19a of erection support section link have as the rear upper connecting rod 19 of upper connecting rod by vehicle-width direction outboard end, two ends that are positioned on the vehicle fore-and-aft direction by vehicle-width direction inside part of rear upper connecting rod 19 are linked to top as the rear suspension crossbeam 21 of suspension crossbeam by the 19b of erection support section, 19c.

And, as shown in Figure 1, in the rear view of vehicle side of the above-below direction substantial middle of rear-axle casing 11, link the vehicle-width direction outboard end that rear lower link 23 is arranged by the 23a of erection support section, the vehicle-width direction medial end of rear lower link 23 is linked to rear suspension crossbeam 21 by the 23b of erection support section.Should have angle of toein adjustment function by rear lower link 23.

And, with regard to than above-mentioned rear lower link 23 more with regard to the front lower link 25 of vehicle front and below, its vehicle-width direction outboard end is linked to the bottom of rear-axle casing 11 by the 25a of erection support section, the vehicle-width direction medial end of front lower link 25 is linked to the bottom of rear suspension crossbeam 21 by the 25b of erection support section.Should have camber angle adjustment function by front lower link 25.In addition, in Fig. 2, omitted rear suspension crossbeam 21.

As shown in Figure 3, rear suspension crossbeam 21 be included in front cross rail 21a that vehicle front side direction vehicle-width direction extends, the after cross member 21b that extends in the rear view of vehicle side direction vehicle-width direction of front cross rail 21a, and the longeron 21c that these each

crossbeam

21a, 21b linked mutually and extend to the vehicle fore-and-aft direction.Longeron 21c is paired up and down longeron, the longeron of its middle and upper part is by the 19b of erection support section, 19c links the end that above-mentioned rear upper connecting rod 19 is arranged, and near the position of after cross member 21b that is positioned at of the longeron of its middle and lower part links the end that rear lower link 23 is arranged by the 23b of erection support section.

And, as shown in Figure 3, this rear suspension crossbeam 21 comprises that extending near the rear extension that the 21d of section is set and extends towards the vehicle-width direction outside and rear from the joint portion between the longeron 21c on after cross member 21b and top near the place ahead of extending towards vehicle front and the vehicle-width direction outside the joint portion between front cross rail 21a and longeron 21c arranges the 21e of section.

And, with above-mentioned the place ahead extend front end 21f, rear that the 21d of section is set extend rear end 21g that the 53e of section is set, and the front end 21h of the longeron 21c on top as the installation portion of installing to vehicle body.

And as shown in Figure 4, near the bottom that is positioned in the position of lower link 25 top location and the rear suspension crossbeam 21 before utilizing radius bar 27 with the ratio of the bottom of rear-axle casing 11 the front end 21h of longeron 21c links up.

As shown in Figure 3, radius bar 27 partly extends to the vehicle fore-and-aft direction than the state that it partly leans on the mode of vehicle-width direction inboard to tilt by the rear view of vehicle side by vehicle front side with it.This radius bar 27 is linked to suspension crossbeam 21 with its leading section by the 27a of erection support section, end thereafter is linked to the bottom of rear-axle casing 11 by the 27b of erection support section.

Have angle of toein and adjust the rear lower link 23 of function, carry out fastening fastening part at it by the 23b of erection support section by the end of vehicle-width direction inboard and have cam mechanism 29(Fig. 4 as the adjustment component of angle of toein adjustment usefulness).And, have the front lower link 25 that camber angle is adjusted function, carry out fastening fastening part at it by the 25b of erection support section by the end of vehicle-width direction inboard and have cam mechanism 31(Fig. 1, Fig. 4 as the adjustment component of camber angle adjustment usefulness).

These

cam mechanisms

29,31 are identical structure basically, therefore, utilize Fig. 5 only cam mechanism 31 to be described.Fig. 5 represents the 25b of erection support section that installs with respect to rear suspension crossbeam 21 of the vehicle-width direction medial end of front lower link 25 with the A-A cutaway view among Fig. 1.

The 25b of this erection support section comprise front lower link 25 sides urceolus 33, the inboard of this urceolus 33 and with the inner core 35 of urceolus 33 coaxial shapes configurations, and the resilient bushing 37 of the drum of rubber system between these urceolus 33 and inner core 35.The axial two ends of inner core 35 are more outstanding to the axial outside than the axial two ends of urceolus 33, and each end that this is outstanding is separately fixed at the pair of flanges 21a of rear suspension crossbeam 21 sides, the inside face of 21b.Resilient bushing 37 is individually fixed in the outer peripheral face of inner core 35 and the inner peripheral surface of urceolus 33, and the outer peripheral face of urceolus 33 is pressed in the front lower link 25.

Inner core 35 has the through hole 35a that runs through vertically its central part, and pair of flanges 21a, the 21b at rear suspension crossbeam 21 is provided with slotted hole 21a1,21b1 correspondingly.Slotted hole 21a1,21b1 form longlyer with the direction of paper quadrature (in Fig. 1 for front lower link 25 axially) in Fig. 5, are inserted with in these each slotted hole 21a1,21b1 and through hole 35a and adjust with bolt 39.

Inner core 35 and front lower link 25 axial central portion and urceolus 33 roughly corresponding position are outstanding to radial outside, are formed with the space 40 of ring-type between inner core 35 and urceolus 33.Adjust with bolt 39 and can under it is positioned at the 39b of bar section and the state that the inner peripheral surface of inner core 35 roughly contacts of axial both sides in this space 40, rotate with respect to inner core 35.

Adjust with bolt 39 comprise head 39a, the 39b of bar section, be positioned at head 39a the 39b of rod section side the end cam 39c and be positioned at the cam 39d of the tip side of the 39b of bar section.As the cam 39c that represents among Fig. 1, these two

cam

39c, 39d make with respect to the circular plate shape of adjusting with the eccentric axis of bolt 39, cam 39c is positioned at the outside of flange 21a, the outside that cam 39d is positioned at flange 21b, and they and adjust with bolt 39 integrated.

A cam 39c shown in Figure 1 is with respect to adjusting with bolt 39 upward and eccentric slightly to the left state, but another cam 39d that can't see among the figure also be to the state of an above-mentioned cam 39c to same direction off-centre.

And, as shown in Figure 1, the position of the axial both sides (being the left and right sides at Fig. 1) of lower link 25 before being arranged in of the radial outside of cam 39c, the state that cuts and hold up with the lateral surface from flange 21a is provided with a pair of

guide piece

41,43, and this a pair of

guide piece

41,43 is in to be contacted with respect to the mode of cam 39c rotation the state of the periphery of this cam 39c.Similarly, the position of the axial both sides (being the left and right sides at Fig. 1) of lower link 25 before being arranged in of the radial outside of cam 39d, state with the lateral surface that is fixed on flange 21a is provided with not shown a pair of guide piece, and this a pair of guide piece is in to be contacted with respect to the mode of cam 39d rotation the state of the periphery of this cam 39d.

Be formed with tabular surface 39b1 at the sidepiece (in Fig. 5, being the bottom) of adjusting with the rod section 39b top of bolt 39, also be formed with tabular surface 45a1 in the mode with this tabular surface 39b1 coupling at the inside face of the through hole 45a of guided rings 45.By when these tabular surfaces 39b1,45a1 are mated mutually, the 39b of bar section that will adjust with bolt 39 is inserted among the through hole 45a of guided rings 45, thereby lead ring 45 can't rotate with bolt 39 relatively with adjusting.

In addition, lean on the threaded portion of tip side to be fastened with nut 47 with bolt 39 than cam 39d adjusting.

Thereby, adjust with bolt 39 rotations by under the state that has become flexible nut 47, making,

cam

39c, 39d also rotate integratedly with bolt 39, and this cam 39c, cam 39d are subjected to respectively a pair of

guide piece

41,43 and not shown a pair of guide piece guiding and moving to the left and right directions among Fig. 1 along each slotted hole 21a1,21b 1.As shown in Figure 1, in order to estimate the amount of movement of this moment, be provided with scale 49 on the surface of cam 39c.

At this, in the present embodiment, for the positional precision of each connecting rod in the multi-link lever suspension fork that improves back suspension device 1, carried out following operation.This operation is carried out under the state (back suspension device 1 not being applied the state of car load) that makes left and right sides trailing wheel from ground is outstanding, but because the two is same to left and right sides trailing wheel, therefore, only left side trailing wheel 3 is described.

At first, as mentioned above, back suspension device 1 is not being applied under the state of car load, the nut shown in Figure 5 47 in the loosening front lower link 25 makes and adjusts with bolt 39 rotations.By adjusting the rotation with bolt 39, cam 39c and cam 39d respectively by a pair of

guide piece

41,43 and not shown a pair of guide piece guiding with adjusting with bolt 39 and rotating integratedly.

When

cam

39c, 39d rotate, move to the left and right directions among Fig. 1 with bolt 39 each slotted hole 21a1,21b1 along

flange

21a, 21b with respect to the adjustment of

cam

39c, 39d off-centre.At this moment, in the present embodiment, in order to produce tension force at front lower link 25, and make

cam

39c, 39d from the anticlockwise direction rotation in Fig. 1 of the state of Fig. 1.

By this

cam

39c, 39d rotation, adjust the vehicle-width direction medial movement with bolt 39 right side in Fig. 1, accompany therewith, front lower link 25 is pulled to the vehicle-width direction is inboard with respect to the 25a of erection support section of vehicle-width direction outboard end.Thus, shown in the schematic diagram of Fig. 6 (a), produce tension force F 1 at front lower link 25.At this moment, while carry out operation by estimating scale 49, the rotation amount adjusted with bolt 39, the i.e. adjustment amount of the tension force F1 of front lower link 25 can be held, thereby the high efficiency of operation can be sought to adjust.

Lower link 25 produces in the operation process of tension force F1 before making, the 25a of erection support section of the vehicle-width direction outboard end of front lower link 25 is not fastening, it only is the state that links, under the state of Fig. 6 (a) after front lower link 25 has produced tension force F1, the fastening erection support 25b of section also carries out the lashing operation of the 25a of erection support section.At this moment, shown in Fig. 6 (a), the rear-axle casing 11 of trailing wheel 3 is pulled by front lower link 25 and tilts with respect to the vehicle above-below direction than the mode of top by vehicle-width direction inboard (in Fig. 6 (a) as the right side) take the bottom.

Then, with the operation that front lower link 25 is carried out similarly, back suspension device 1 is not being applied under the state of car load, shown in Fig. 6 (b), make on the rear lower link 23 to produce tension force F2.

Lower link 23 produces in the operation process of tension force F2 after making, the 23a of erection support section of its vehicle-width direction outboard end is not fastening, it only is the state that links, under the state of Fig. 6 (b) after rear lower link 23 has produced tension force F2, the fastening erection support 23b of section is fastening and carry out the lashing operation of the 23a of erection support section.At this moment, shown in Fig. 6 (b), the rear-axle casing 11 of trailing wheel 3 is pulled by rear lower link 23 and tilts with respect to the vehicle fore-and-aft direction than the inboard mode by the outside in the vehicle-width direction (in Fig. 6 (b) as the right side) of paper take the paper outside.

As described above make respectively before lower link 25 and rear lower link 23 produce in the operation process of tension force F1 and tension force F2, the 27a of erection support section, the 27b at the two ends of radius bar 27 are not fastening, it only is the state that links, when producing tension force F1 and tension force F2, radius bar 27 becomes vertically compressed state.

By this radius bar 27 compressed state under carry out the 27a of erection support section, 27b fastening at the two ends of radius bar 27, shown in Fig. 6 (c), become the state that pair radius bar 27 is paid compressive force F3 vertically.

And, as described above make respectively before lower link 25 and rear lower link 23 produce in the operation process of tension force F1 and tension force F2, the 19a of erection support section, 19b, the 19c at the two ends of rear upper connecting rod 19 are not fastening, it only is the state that links, when producing tension force F1 and tension force F2, rear upper connecting rod 19 becomes the state that is pulled vertically.By under this state that the 19a of erection support section, 19b, the 19c at the two ends of connecting rod on rear 19 is fastening, become rear upper connecting rod 19 is paid the state that pulls load.

Like this, produce tension force F1 and tension force F2 at front lower link 25 and rear lower link 23, also produce tension force on the connecting rod 19 on rear, and the state that pair radius bar 27 applies compressive force F3 becomes the state near the real vehicle state, and the real vehicle state is to instigate tire to be contacted with ground and the state that back suspension device 1 is applied with vehicle weight.

And, in the present embodiment, in order to reach above-mentioned real vehicle state, produced fastening each erection support section under the state of tension force at front lower link 25 and rear lower link 23, and produced compressive force and also produce fastening each erection support section under the state of tension force on rear on the connecting rod 19 at radius bar 27.Thus, each erection support section of each connecting rod (front lower link 25, rear lower link 23, radius bar 27, rear upper connecting rod 19) can be fastened with the state of having been paid in advance load, improves each connecting rod with respect to the positional precision of vehicle body (rear suspension crossbeam 21) thereby can eliminate rocking of each erection support section.

Be used for the operation of the positional precision of each connecting rod of raising as this, in the present embodiment, can be at the lashing operation that does not carry out each connecting rod on the wheel under the state of mounting tyre, wheel rim, therefore, this tire, wheel rim can not become interference, can easily carry out lashing operation.

In addition, the lashing operation that finally is adjusted at each above-mentioned connecting rod of camber angle, angle of toein carries out after finishing.

And in the present embodiment, adjustment component comprises cam 39c, the 39d that can rotate integratedly and use with respect to this adjustment with adjustment bolt 39 off-centre with bolt 39.Therefore, only make and adjust with bolt 39 rotations,

cam

39c, 39d will rotate, and based on these, can easily produce tension force F1 and tension force F2 at front lower link 25 and rear lower link 23.

In addition, in the above-described embodiment, the two produces tension force at front lower link 25 and rear lower link 23, but also can produce tension force at any connecting rod.In this case, also can be under the state of having paid in advance load each erection support section of fastening each connecting rod, thereby can eliminate rocking of each erection support section and improve each connecting rod with respect to the positional precision of vehicle body (rear suspension crossbeam 21).

Description of reference numerals

1, back suspension device (draft hitch); 3, trailing wheel (wheel); 11, rear-axle casing (axle housing); 19, upper connecting rod (going up afterwards connecting rod); 21, rear suspension crossbeam (suspension crossbeam); 23, rear lower link; 25, front lower link; 27, radius bar; 29, cam mechanism (adjustment component of angle of toein adjustment usefulness); 31, cam mechanism (adjustment component of camber angle adjustment usefulness); 39c, 39d, cam.

Claims

1. a draft hitch is characterized in that,

This draft hitch comprises:

Upper connecting rod, it links top and vehicle body with the axle housing of the revolvable mode supporting wheel of wheel;

Front lower link, it links bottom and the vehicle body of above-mentioned axle housing;

Rear lower link, it links part and the vehicle body by the rear view of vehicle side that are positioned at the above-below direction central portion of above-mentioned axle housing;

Radius bar, it links bottom and the vehicle body of above-mentioned axle housing;

Be provided with the adjustment component of camber angle adjustment usefulness at above-mentioned front lower link, and, be provided with the adjustment component of angle of toein adjustment usefulness at above-mentioned rear lower link, draft hitch is not being applied under the state of car load, the tension force that the tension force that front lower link is applied for the adjustment component of utilizing above-mentioned camber angle adjustment usefulness and the adjustment component of utilizing above-mentioned angle of toein adjustment usefulness apply rear lower link, produce wherein at least one tension force, under this produces tension state, that the installation component of each end of above-mentioned each connecting rod and above-mentioned radius bar is fastening.

2. draft hitch according to claim 1 is characterized in that,

Draft hitch is not being applied under the state of car load, utilize the adjustment component of camber angle adjustment usefulness to produce tension force at front lower link, and, utilize the adjustment component of angle of toein adjustment usefulness to produce tension force at rear lower link, produce under tension state the installation component of each end of above-mentioned each connecting rod and above-mentioned radius bar fastening at this.