JPH0451230Y2 - - Google Patents

Description

[Detailed description of the invention] (Technical field) The present invention is installed in the attachment part of the Atsupa support for vehicle suspension to the vehicle body, and advantageously increases the strength and durability of the attachment of the Atsupa support to the vehicle body. The present invention relates to a dust seal that can be ensured in a stable manner.

(Background Art) Conventionally, in suspension mechanisms of automobiles such as strut type and four-link type, shock absorbers with built-in shock absorbers placed between the axle or arm supporting the wheels and the car body have been used. Usually, an atsupa support is interposed in the attachment part. Such Atsupa support is installed for the purpose of suppressing the transmission of vibration from the wheel side to the vehicle body through the shock absorber, and
Generally, there is an inner cylindrical metal fitting to which the piston rod of a shock absorber is attached, and an outer cylindrical metal fitting attached to the vehicle body, which is disposed outside the inner cylindrical metal fitting and has an outer flange portion extending radially outward. The structure is such that they are integrally connected by an elastic body interposed between them.

When attaching such an Atsupa support to the vehicle body side, normally, one surface of the outer flange portion of the outer cylinder fitting is in contact with the vehicle body side, and the outer flange portion is attached to the vehicle body at multiple locations in the circumferential direction. This is done by bolting it to the side, and there is a space between the outer flange of the Atsupa support and the mounting surface of the vehicle body to prevent muddy water from entering through the gap between the mounting surfaces. Generally, an annular dust seal is inserted between the outer flange portion and the vehicle body to seal the space between the outer flange portion and the vehicle body.

On the other hand, regarding this kind of Atsupa support,
Extremely large loads or vibrations are applied through shock absorbers, coil springs, etc. placed between the wheels, so if there is any looseness or play in the attachment to the vehicle body, the outer flange may crack. Problems such as noise and abnormal noises are likely to occur, and therefore, sufficient mounting strength and durability are required for the attachment portion of the Atsupa support to the vehicle body.

Therefore, conventionally, in order to prevent rattling caused by machining errors in the outer flange of the outer cylinder metal fitting or the mounting surface on the vehicle body side, for example, a By making each of the bolt fixing parts slightly protrude toward the mounting surface side (vehicle body side), each of the fixing parts can be brought into more reliable contact with the car body side. .

Alternatively, the mounting strength can be increased by slightly curving the adjacent fixed parts of the outer flange toward the mounting surface so that the fixed parts come into elastic contact with the vehicle body. It is also being considered to improve the performance and prevent loosening.

However, in order to provide a protruding part or a curved part to the outer flange of the outer cylinder metal fitting, the shape of the mold becomes complicated, which is not desirable in terms of manufacturing cost, and it is also difficult to ensure accuracy. can be,
It could hardly be called an effective solution.

(Problem to be solved) The present invention was developed against the background of the above-mentioned circumstances, and the problem to be solved is to improve the mounting strength and durability of the atsupa support for vehicle suspension to the vehicle body. An object of the present invention is to provide a new dust seal that is interposed between a top support and a vehicle body and is improved so as to advantageously and stably ensure the dust seal.

(Solution Means) In order to solve this problem, in the present invention, an inner cylindrical metal fitting and an outer cylindrical metal fitting arranged at a predetermined distance in the radial direction are provided with rubber interposed between them. A state in which one surface of the outer flange provided on the outer cylindrical fitting comes into contact with the vehicle body at multiple locations in the circumferential direction of the outer flange, which has a structure integrally connected by an elastic body. In a suspension support that is bolted to the vehicle body to provide anti-vibration support for a shock absorber attached to the inner cylinder metal fitting on the vehicle body, the outer flange portion of the outer cylinder metal fitting and the car body are connected to each other. A dust seal is interposed between the upper support and the vehicle body, and is attached to the inner peripheral side portion of the mounting surface of the outer flange portion to the vehicle body side. an annular elastic sheet portion that is compressed between the and the vehicle body;
The elastic seal portion is integrally formed with a predetermined width extending radially outward from the outer periphery of the elastic seal portion, and is connected to the periphery between the bolt fixing portions provided at a plurality of locations on the outer flange portion. It is characterized by having a thin elastic sheet portion which is compressed between the outer flange portion and the vehicle body at each central portion in the direction.

(Operation/Effect) In other words, the dust seal according to the present invention is installed at the attachment part of the Atsupa support to the vehicle body, and is conventionally used to prevent muddy water etc. from entering through the gap. A dust seal that is integrally provided with an elastic sheet portion that is compressed between the outer flange portion and the vehicle body between each fixing portion of the outer flange portion that is bolted to the vehicle body side. It is.

By using such a dust seal, the outer flange part of the Atsupa support can be pushed toward the vehicle body not only at the bolt fixing part, but also between the bolt fixing parts via the elastic sheet part of the dust seal. Since the parts can be brought into contact with each other, the contact surface at the time of installation can be advantageously secured, and
The elastic force of the elastic sheet portion and the outer flange portion can effectively prevent the bolt from loosening and rattling, thereby effectively improving the mounting strength and durability of the Atsupa support. It is.

In addition, since the elastic sheet part is integrally constructed with the elastic seal part as a dust seal that seals between the attachment surface of the Atsupa support and the vehicle body, it does not involve an increase in the number of special parts. Another major feature of the present invention is that it is extremely easy to manufacture, and therefore the above-mentioned effects can be advantageously achieved at low cost and with excellent manufacturability.

(Example) Hereinafter, in order to clarify the present invention more specifically, an example of the present invention will be described in detail with reference to the drawings.

First, FIGS. 1 and 2 show a suspension top support 12 to which a dust seal having a structure according to the present invention is attached. In these figures, reference numeral 14 denotes an inner cylindrical fitting, which includes a stepped cylindrical inner fitting 20 consisting of a small diameter portion 16 and a large diameter portion 18, and an inner fitting 20 that is integrally formed on the outer peripheral surface of the stepped portion of the inner fitting 20. A tapered cylindrical outer metal fitting 22 is welded to the outside of the large diameter portion 18 and positioned outside the large diameter portion 18.

In addition, the inner metal fitting 2 constituting the inner cylindrical metal fitting 14
0, the bearing 24 is located within the large diameter portion 18.
The outer ring 26 is fixedly attached to the large diameter portion 18 by fitting the outer ring 26 into the large diameter portion 18 and roll caulking the open end of the large diameter portion 18 . Although not shown, the piston rod of the shock absorber is inserted into the inner ring 28 of the bearing 24 and fixed with a bolt or the like, thereby securing the shock absorber. The piston rod is attached to the inner metal fitting 20 and, by extension, the inner cylindrical metal fitting 14 so as to be relatively rotatable around the axis but not relatively movable in the axial direction.

On the other hand, as shown in FIGS. 1 and 2, an outer cylindrical fitting 30 is disposed on the radially outer side of the inner cylindrical fitting 14 as described above. This outer cylindrical fitting 30 is composed of an upper cylindrical fitting 32 and a lower cylindrical fitting 34 which are overlapped in the axial direction, and has an overall tapered cylindrical shape whose diameter gradually increases toward one side in the axial direction. It has an outer flange portion 36 that expands radially outward at the overlapping portion of the upper and lower cylindrical fittings 32 and 34 located at the center in the axial direction.

The outer cylindrical fitting 30 is located concentrically at a predetermined distance on the outside of the inner cylindrical fitting 14 in the radial direction, and its tapered inner circumferential surface is in contact with the outer fitting 22 of the inner cylindrical fitting 14. It is disposed offset by a predetermined distance in the axial direction, facing substantially parallel to the tapered outer circumferential surface.

In addition, under such arrangement condition, the inner cylinder fitting 1
4 and the outer cylindrical fitting 30, a rubber elastic body 38 having a generally cylindrical shape as a whole is interposed,
The inner cylindrical fitting 14 and the outer cylindrical fitting 30 are vulcanized and bonded to the inner circumferential surface and the outer circumferential surface of the rubber elastic body 38, respectively, so that the inner cylindrical fitting 14 and the outer cylindrical fitting 30 are integrally formed. They are elastically connected to each other.

In the Atsupa support 12 having such a structure, three mounting holes 40 are provided at approximately equal intervals in the circumferential direction in the outer flange portion 36 of the outer cylinder fitting 30. mounting hole 40
With the mounting bolts 42 inserted therein, the outer cylindrical metal fitting 30 is fixedly attached to the vehicle body with the upper surface 44 of the outer flange portion 36 in contact with the mounting surface of the vehicle body (not shown). It is ready to be installed.

That is, by attaching the outer cylindrical fitting 30 to the vehicle body, the inner cylindrical fitting 14
The piston rod is elastically and rotatably connected to the vehicle body via the bearing 24 and the rubber elastic body 38 in a vibration-proof manner to the shock absorber attached to the piston rod.

The upper surface 4 of the outer flange portion 36 is brought into contact with the vehicle body during installation of the upper support 12 having the above-described structure.
4, a dust seal 48 is attached thereto.

As shown in FIGS. 3 and 4, this dust seal 48 is separately formed using a predetermined rubber material, and has a generally annular shape as a whole.

The inner peripheral side portion of the dust seal 48 is connected to the outer flange portion 36 of the outer cylinder fitting 30.
It is formed as an annular plate-shaped seal portion 50 having inner and outer diameters corresponding to the inner circumferential edge portion of the seal portion 50 . That is,
As shown in FIGS. 1 and 2, the seal portion 50 is mounted on the upper side surface 44 of the outer flange portion 36 in a placed state, and prevents the above-mentioned upper support 12 from attaching to the vehicle body. During installation, pressure is applied between the outer flange portions 36 and the vehicle body, thereby sealing the mounting surfaces and preventing entry of muddy water, dirt, etc. It has the original function of a known dust seal.

Furthermore, in the case of such a dust seal 48, at the outer peripheral edge portion of the seal portion 50, it integrally extends radially outward with a predetermined width.
Three substantially rectangular flat sheet portions 52 are provided at substantially equal intervals in the circumferential direction. And dust seal 4
8 to the upper support 12, these seal parts 50 are attached to the outer flange part 36 on the upper surface 44 of the outer flange part 36, respectively, as shown in FIGS. 1 and 2. It is arranged to be located at the center in the circumferential direction between the three mounting holes 40 provided in the .

That is, by positioning these seat portions 52 at the center between the adjacent mounting holes 40, 40 in the outer flange portion 36,
When attaching the Atsupa support 12 to the vehicle body as described above, the attachment hole 4 of the outer flange portion 36 is
The center portion between 0 and 40 is the seat portion 5, respectively.
2, it is brought into contact with the mounting surface on the vehicle body side.

In addition, although the upper side surface 44 of the outer flange portion 36 is formed as a flat surface, the mounting bolts 42 inserted into each mounting hole 40 are tightened when mounting the outer flange portion 36 to the vehicle body as described above. Based on the curvature of the outer flange portion 36 and the elastic deformation of the seat portion 52 due to force, the area around each attachment hole 40 can be brought into good contact with the vehicle body.

The thickness of each seat portion 52 in the dust seal 48 is determined by taking into consideration the material, the shape and strength of the outer flange portion 36 of the Atsupa support 12, the tightening torque of the mounting bolt 42, etc.
It is set appropriately, but usually 0.3 to 2 mm
It will be set to a certain degree.

Therefore, when attaching the Atsupa support 12 to the vehicle body, by installing the dust seal 48 as described above, the outer flange portion 36 can be removed.
However, not only the area around each mounting hole 40 that is tightened with the mounting bolt 42, but also the area around those mounting holes 40, 4
Since each center portion in the circumferential direction between 0 and 0 is brought into contact with the vehicle body, the contact surface with respect to the vehicle body can be advantageously secured, and the mounting strength is improved and stabilized. This can be achieved in a practical manner.

Furthermore, by interposing such a dust seal 48 between the Atsupa support 12 and the vehicle body,
Based on the elastic force of the dust seal 48 and the outer flange portion 36, the loosening of the mounting bolt 42 can be effectively prevented, and the generation of backlash and abnormal noise at the mounting portion, as well as cracking of the outer flange portion 36, etc. It is also possible to achieve the effect that malfunctions can be advantageously prevented.

Furthermore, since the dust seal 48 as described above also has the function of a conventionally commonly used sealing member to prevent the intrusion of muddy water, etc., it does not involve the addition of new members. Another great advantage is that excellent effects such as improved mounting strength and durability can be easily achieved at low cost.

Further, since the dust seal 48 is constructed separately from the Atsupa support 12,
If the size of the device part of the outer flange portion 36 is approximately the same, it can be successfully used for Atsupa supports with different specifications, and by providing versatility, costs can be further reduced. This makes it possible to

Although one embodiment of the present invention has been described in detail above, this is a literal illustration, and the present invention is not to be construed as being limited to such a specific example.

In particular, the specific structure of the upper support 12 to which the dust seal according to the present invention is applied is by no means limited to that of the above embodiment, and any of various known structures may be effectively applied. Of course you can get it.

For example, in the embodiment described above, the upper support 12 for the front wheel was used, but the present invention is also applicable to an upper support for the rear wheel that does not include the bearing 24. Alternatively, in the upper support 12 of the above embodiment, the outer flange portion 36
The upper side surface 44 was a flat surface, but the area around each mounting hole 40 is formed as a protrusion protruding toward the upper side surface 44 side, so that contact with the mounting surface on the vehicle body side can be more advantageously ensured. You can also do it.

Further, in the case of the upper support in the above embodiments, attachment holes 40, which are attachment parts to the vehicle body side, were provided at three locations in the circumferential direction of the outer flange portion 36. 40
may be provided at two or four or more locations.

Furthermore, after forming the dust seal as described above, considering ease of handling during transportation and installation on a vehicle,
It may be adhered to the outer flange portion of the Atsupa support using an adhesive or the like.

Although not listed in detail, the present invention can be implemented with various changes, modifications, improvements, etc. based on the knowledge of those skilled in the art, and such embodiments do not go beyond the spirit of the present invention. It goes without saying that all of these are included within the scope of the present invention as long as they do not deviate from the above.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal cross-sectional view showing a state in which a dust seal, which is an embodiment of the present invention, is attached to an upper support, and corresponds to the - cross section in FIG. FIG. Moreover, FIG. 3 is a vertical cross-sectional view showing only the dust seal taken out, and corresponds to the - cross section in FIG. 4, and FIG.
FIG. 4 is a plan view in FIG. 3; 12... Atsupa support, 14... Inner cylinder metal fittings,
30... Outer cylinder metal fitting, 36... Outer flange part, 38
... Rubber elastic body, 40 ... Mounting hole, 42 ... Mounting bolt, 44 ... Upper surface (mounting surface), 48 ... Dust seal, 50 ... Seal part, 52 ... Seat part.

Claims (1)

[Claims for Utility Model Registration] An inner cylindrical metal fitting and an outer cylindrical metal fitting arranged at a predetermined distance in the radial direction are integrally connected by a rubber elastic body interposed between them. has a structure,
The outer flange provided on the outer cylindrical metal fitting is bolted to the vehicle body in a state where one surface of the outer flange is in contact with the vehicle body at multiple locations in the circumferential direction, so that the inner cylindrical metal fitting is In an upper support for a suspension that provides anti-vibration support for an attached shock absorber on the vehicle body side, the upper support is interposed between the outer flange portion of the outer cylindrical metal fitting and the vehicle body, and is connected between the upper support and the vehicle body. a dust seal for sealing, an annular elastic sheet portion that is attached to an inner peripheral side portion of the outer flange portion on the mounting surface to the vehicle body side and is compressed between the outer flange portion and the vehicle body; The elastic seal portion is integrally formed to extend radially outward from the outer periphery of the elastic seal portion with a predetermined width of the body, and is located between bolt fixing portions to the vehicle body provided at a plurality of locations on the outer flange portion. A dust seal for an upper support for a suspension, characterized in that each center portion in the circumferential direction has a thin elastic sheet portion that is compressed between the outer flange portion and the vehicle body.