JP2004322795A - Suspension device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent constituent members from being damaged by improving ease of assembly in a suspension device. <P>SOLUTION: On an upper spring seat 17 for supporting a coil spring 18, a retaining plate 27 of an insulator 21 is fitted so as to perform smooth relative rotation by a bearing 28. An upper end of a shock absorber 11 inserted into the coil spring 18 is fixed on a supporting plate 26 supported through a rubber member 25 of the insulator 21. At the retaining plate 27, a skirt part 27c having a predetermined space S is provided between a contact portion 27b coming into contact with the outer periphery of a bearing 28 and the upper spring seat 17 which extends outwards from the contact part 27b and swells outwards. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a suspension device that connects a vehicle body and an axle to absorb a shock from a road surface.
[0002]
[Prior art]
FIG. 5 shows a cross section of a main part of the conventional suspension device, and FIG. 6 shows a cross section showing a problem at the time of assembly in the conventional suspension device.
[0003]
In a conventional suspension device, as shown in FIG. 5, a shock absorber 001 is connected to a knuckle (not shown) at a lower end, a lower spring seat is fixed to an outer peripheral portion, and has a piston rod 002 extending upward. ing. An upper spring seat 004 is mounted on the upper part of the piston rod 002 via a support member 003 and extends upward, and a coil spring 005 is mounted between the upper spring seat 004 and the lower spring seat. ing. On the other hand, an insulator 009 having a rubber member 008 mounted between the upper plate 006 and the lower plate 007 is fixed to the vehicle body side, and a holding plate 010 is fixed to the lower surface of the lower plate 007. The insulator 009 is mounted on the upper part of the upper spring seat 004 via the bearing 011, and the upper end of the piston rod 002 is connected to the support bracket 012 of the insulator 009.
[0004]
Accordingly, in such an input-separation type suspension device, the reaction force from the coil spring 005 is directly transmitted to the vehicle body via the bearing 011, and the reaction force from the shock absorber 001 is transmitted to the rubber member 008 of the insulator 009. The transmission is indirectly transmitted to the vehicle body via the control unit.
[0005]
As the above-mentioned conventional suspension device, there is a technique described in Patent Document 1 below.
[0006]
[Patent Document 1]
WO 02/040299 pamphlet [0007]
[Problems to be solved by the invention]
In the above-mentioned conventional input-separation type suspension device, the bearing 011 is mounted on the upper portion of the upper spring seat 004, and the holding plate 010 of the insulator 009 is assembled so as to be fitted to the bearing 011. However, when assembling the insulator 009 on the upper portion of the upper spring seat 004, as shown in FIG. 6, the positional relationship between the two is shifted in the horizontal direction, and the lower portion of the holding plate 010 comes into contact with the upper surface of the bearing 011 and is damaged. There is a fear.
[0008]
The present invention has been made to solve such a problem, and an object of the present invention is to provide a suspension device that prevents damage to constituent members by improving assemblability.
[0009]
[Means for Solving the Problems]
According to a first aspect of the present invention, there is provided a suspension device for supporting a spring on a lower surface, a shock absorber inserted into the spring and passing through an opening provided in the upper spring seat. An insulator that supports the upper end of the shock absorber on the vehicle body side via an elastic member, a bearing that is provided between the insulator and the upper spring seat and that allows relative rotation between the two, and an insulator that is interposed between the insulator and the bearing. And an input separation type strut for transmitting the reaction force of the spring received by the upper spring seat directly to the vehicle body via the bearing, the bearing having a bearing holding portion whose upper surface is fixed to the insulator and the lower surface is detachably fitted to the bearing. Type suspension device, bearing The holding portion is provided with a contact portion in contact with the outer peripheral side of the bearing, and a skirt portion extending downward from the contact portion and bulging outward to provide a predetermined space between the contact portion and the upper spring seat. .
[0010]
Therefore, when assembling the insulator on the upper portion of the upper spring seat, the bearing holding portion is guided by the skirt portion, and the contact portion is fitted to the bearing. Contact with the upper surface of the bearing can be prevented, and damage to various members can be prevented.
[0011]
In the suspension device according to the second aspect of the present invention, the bearing holding portion has a smooth surface that smoothly connects the contact portion and the skirt portion. Therefore, the bearing can be prevented from being damaged, the centering can be quickly performed by the smooth surface, and the assembling operation time can be reduced.
[0012]
In the suspension device according to the third aspect of the present invention, the inner peripheral surface of the skirt portion has a shape corresponding to the upper surface shape of the upper spring seat. Therefore, invasion of muddy water, dust and the like into the bearing can be prevented by the labyrinth effect.
[0013]
In the suspension device according to the fourth aspect of the invention, a seal member is interposed between the skirt portion and the upper spring seat. Therefore, intrusion of muddy water, dust and the like into the bearing can be reliably prevented.
[0014]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
[0015]
FIG. 1 is a cross-sectional view of a main part of the suspension device according to the first embodiment of the present invention, FIG. 2 is a schematic diagram showing the suspension device of the present embodiment, and FIG.
[0016]
In the suspension device of the first embodiment, as shown in FIGS. 1 and 2, the shock absorber 11 has a piston rod 12 that expands and contracts upward, and a knuckle 14 is connected to a lower end portion via a mounting bracket 13. ing. In the shock absorber 11, a lower spring seat 15 is fixed to an outer peripheral portion, while an upper spring seat 17 is mounted on a piston rod dapper 12 via a support member 16, and a distal end portion of the shock absorber 11 extends upward. I have. A coil spring 18 is mounted between the upper spring seat 17 and the lower spring seat 15, and is disposed so as to house the shock absorber 11. A bellows 19 is mounted between the support member 16 and the lower spring seat 15 to cover the shock absorber 11 to prevent intrusion of muddy water and dust.
[0017]
An insulator 21 is fixed to the spring house panel 20 by a plurality of bolts 22 at a front portion on the vehicle body side. In the insulator 21, a disc-shaped upper plate 23 and a lower plate 24, which are bulged so that their central portions are separated from each other, are joined, and a rubber member (elastic member) 25 is mounted along the inner peripheral portion. A support plate 26 is supported by the rubber member 25. The upper plate 23 and the lower plate 24 are formed with through holes 24a through which the upper end of the piston rod 12 penetrates, and the support plate 26 is formed with a connecting hole 26a through which the upper end of the piston rod 12 is connected. ing.
[0018]
In the insulator 21, a holding plate (bearing holding portion) 27 is fixed to the lower surface of the lower plate 24. The insulator 21 is mounted on the upper part of the upper spring seat 17 via the bearing 28, and the upper end of the piston rod 12 is inserted into the insulator 21, inserted into the connection hole 26 a of the support bracket 26, and connected to the connection bolt 29. Are connected by
[0019]
At the connecting portion between the insulator 21 and the upper spring seat 17, the upper spring seat 17 is formed integrally with a horizontal portion 17a having a disc shape and a holding portion 17b of the coil spring 18 on the outer peripheral side of the horizontal portion 17a. On the other hand, the inner peripheral side of the horizontal portion 17a bulges upward, and the vertical wall portion 17c, the support surface portion 17d, and the flange portion 17e are formed smoothly and continuously, and the through hole 17f of the piston rod 12 is formed in the center portion. Have been.
[0020]
The bearing 28 is configured such that a large number of balls 28c are rotatably mounted between an upper metal fitting 28a and a lower metal fitting 28b each having a donut shape. The holding plate 27 includes a mounting surface 27 a fixed to the lower surface of the lower plate 24 of the insulator 21, a ring-shaped contact portion 27 b having a vertical wall shape supported in contact with and supported on the outer peripheral side of the bearing 28, and the contact portion 27 b. The skirt portion 27c which extends downward and bulges outward and is provided with a predetermined distance S between itself and the upper spring seat 17 smoothly and continuously forms a smooth surface. In this case, the inner peripheral surface of the skirt portion 27c has an upper surface shape of the upper spring seat 17, that is, a shape corresponding to a portion extending from the vertical wall portion 17c to the support surface portion 17d.
[0021]
That is, the interval S between the inner peripheral surface of the skirt portion 27c of the holding plate 27 and the outer peripheral surface of the vertical wall portion 17c of the upper spring seat 17 has substantially the same size in a predetermined range A in the radial direction. Is set.
[0022]
In the assembling work of the suspension device of the present embodiment configured as described above, as shown in FIG. 3, a bearing 28 is mounted on the support surface 17d and the flange 17e of the upper spring seat 17, and the bearing 28 is A holding plate 27 fixed to a lower portion of the insulator 21 is assembled from above. At this time, the holding plate 27 is centered while the skirt portion 27c is in contact with and guided by the outer peripheral portion of the bearing 28, and the contact portion 27b is fitted on the outer peripheral portion of the bearing 28. Accordingly, the insulator 21 is assembled at a regular position of the upper spring seat 17, and the end of the holding plate 27 does not contact the upper surface of the bearing 28 or is assembled in a state where the end is in contact with the bearing 28. Thus, it is possible to prevent various members from being damaged.
[0023]
With the suspension device assembled in a correct state, the reaction force from the coil spring 18 is directly transmitted to the vehicle body side via the bearing 28 while the vehicle is running, and the reaction force from the shock absorber 11 is transferred to the rubber of the insulator 21. It is indirectly transmitted to the vehicle body via the member 25.
[0024]
As described above, in the suspension device of the first embodiment, the holding plate 27 of the insulator 21 fixed to the vehicle body is relatively rotatable by the bearing 28 above the upper spring seat 17 that supports the coil spring 18 on the lower surface. At the same time, the upper end of the shock absorber 11 inserted into the coil spring 18 is fixed to the support plate 26 supported via the rubber member 25 of the insulator 21, and is in contact with the holding plate 27 on the outer peripheral side of the bearing 28. A contact portion 27b and a skirt portion 27c extending downward from the contact portion 27b and bulging outward and having a predetermined space S between the contact portion 27b and the upper spring seat 17 are provided.
[0025]
Therefore, when assembling the insulator 21 on the upper portion of the upper spring seat 17, the skirt portion 27c of the holding plate 27 is guided by the outer peripheral portion of the bearing 28, and the contact portion 27b is fitted on the bearing 28, so that the assembling property is improved. Thus, the contact between the end of the holding plate 27 and the upper surface of the bearing 28 can be prevented, and damage to various members can be prevented.
[0026]
Further, the contact portion 27b and the skirt portion 27c of the holding plate 27 are formed as a smooth surface that is smoothly continuous, so that the bearing 28 can be prevented from being damaged, and the centering can be quickly performed by the smooth surface, thereby shortening an assembling operation time. can do.
[0027]
Further, the inner peripheral surface of the skirt portion 27c of the holding plate 27 has a shape corresponding to the vertical wall portion 17c and the support surface portion 17d of the upper spring seat 17, and the labyrinth effect prevents intrusion of muddy water and dust into the bearing 28. can do.
[0028]
FIG. 4 shows a cross section of a main part of a suspension device according to a second embodiment of the present invention. Note that members having the same functions as those described in the above-described embodiment are denoted by the same reference numerals, and redundant description will be omitted.
[0029]
In the suspension device of the second embodiment, as shown in FIG. 4, the holding plate 27 is configured such that the mounting surface portion 27a, the contact portion 27b, and the skirt portion 27c smoothly and continuously form a smooth surface. A predetermined distance S is set between the inner peripheral surface of the portion 27c and the outer peripheral surface of the vertical wall portion 17c of the upper spring seat 17. The base end of the ring-shaped seal member 31 is fixed to the inner peripheral surface of the skirt portion 27c within the interval S, and the distal end of the seal member 31 is fixed to the vertical wall portion 17c of the upper spring seat 17. Is pressed against the outer peripheral surface.
[0030]
Accordingly, when the vehicle is steered, the upper spring seat 17 rotates with respect to the insulator 21, but the distal end of the seal member 31 mounted on the skirt portion 27 c of the holding plate 27 is attached to the vertical wall portion 17 c of the upper spring seat 17. Since it is pressed, intrusion of muddy water and dust from the outside into the bearing 28 can be reliably prevented.
[0031]
In the second embodiment, the seal member 31 is attached to the inner peripheral surface of the skirt portion 27c of the holding plate and pressed against the outer peripheral surface of the upper spring seat 17, but the vertical wall portion of the upper spring seat 17 is The seal member 31 may be attached to the holding plate 17c and pressed against the skirt portion 27c of the holding plate, and the shape of the seal member is not limited to the embodiment.
[0032]
As described above, in the suspension device according to the second embodiment, the holding plate 27 extends downward from the contact portion 27b in contact with the outer peripheral side of the bearing 28 and bulges outward to form a gap between the holding plate 27 and the upper spring seat 17. Is provided with a skirt portion 27c having a predetermined interval S, and a seal member 31 is interposed between the skirt portion 27c and the upper spring seat 17. Therefore, intrusion of muddy water, dust, and the like into the bearing 28 can be reliably prevented.
[0033]
【The invention's effect】
As described above in detail in the embodiment, according to the suspension device of the first aspect of the present invention, the upper spring seat supporting the spring on the lower surface, and the opening provided in the upper spring seat inserted into the spring are provided. A shock absorber that penetrates, an insulator that supports the upper end of the shock absorber to the vehicle body via an elastic member, a bearing that is provided between the insulator and the upper spring seat and that allows relative rotation between the two, an insulator and a bearing And a bearing holding part whose upper surface is fixed to the insulator and the lower surface is detachably fitted to the bearing, and the spring reaction force received by the upper spring seat is directly transmitted to the vehicle body via the bearing. Input separated strut type suspension equipment A skirt portion provided on the bearing holding portion and having a predetermined interval between the contact portion in contact with the outer peripheral side of the bearing and a lower portion extending from the contact portion and bulging outward and providing an upper spring seat; When installing the insulator on the upper part of the upper spring seat, the bearing holding part will be guided by the skirt part and the contact part will be fitted to the bearing, improving the assemblability and holding the bearing The contact between the end of the part and the upper surface of the bearing can be prevented, and damage to various members can be prevented.
[0034]
According to the suspension device of the second aspect of the present invention, since the bearing holding portion is a smooth surface where the contact portion and the skirt portion are smoothly continuous, damage to the bearing can be prevented, and centering can be quickly performed by the smooth surface. As a result, the assembling work time can be reduced.
[0035]
According to the suspension device of the third aspect of the present invention, since the inner peripheral surface of the skirt portion has a shape corresponding to the upper surface shape of the upper spring seat, the labyrinth effect prevents intrusion of muddy water and dust into the bearing. Can be.
[0036]
According to the suspension device of the fourth aspect of the present invention, since the sealing member is interposed between the skirt portion and the upper spring seat, intrusion of muddy water and dust into the bearing can be reliably prevented.
[Brief description of the drawings]
FIG. 1 is a fragmentary sectional view of a suspension device according to a first embodiment of the present invention.
FIG. 2 is a schematic diagram illustrating a suspension device according to a first embodiment.
FIG. 3 is a cross-sectional view illustrating an operation at the time of assembly in the suspension device of the first embodiment.
FIG. 4 is a fragmentary sectional view of a suspension device according to a second embodiment of the present invention.
FIG. 5 is a sectional view of a main part of a conventional suspension device.
FIG. 6 is a cross-sectional view illustrating a problem during assembly in a conventional suspension device.
[Explanation of symbols]
11 Shock absorber 15 Lower spring seat 17 Upper spring seat 18 Coil spring 20 Spring house panel (body)
21 insulator 27 holding plate (bearing holding part)
27b Contact part 27c Skirt part 28 Bearing 31 Seal member S interval

Claims (4)

An upper spring seat that supports a spring at a lower surface, a shock absorber that is inserted into the spring and penetrates an opening provided in the upper spring seat, and an upper end of the shock absorber is moved toward the vehicle body via an elastic member. An insulator to be supported; a bearing provided between the insulator and the upper spring seat to allow relative rotation between the insulator and the lower surface; And a bearing holding portion detachably fitted to the bearing, and an input separation type strut type suspension device for directly transmitting a reaction force of the spring received by the upper spring seat to a vehicle body via the bearing. The bearing holding part is A contact portion that contacts the outer peripheral side of the ring; and a skirt portion that extends downward from the contact portion and bulges outward to provide a predetermined space between the upper spring seat and the skirt portion. Suspension device. The suspension device according to claim 1, wherein the bearing holding portion has a smooth surface that smoothly connects the contact portion and the skirt portion. 3. The suspension device according to claim 1, wherein the skirt portion has an inner peripheral surface having a shape corresponding to an upper surface shape of the upper spring seat. 3. The suspension device according to claim 1, wherein a seal member is interposed between the skirt portion and the upper spring seat.

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