JPS5851468Y2 - Anti-vibration support - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a vibration-proof support used for mounting vibrating devices such as vehicle engines, general machinery, and construction machinery.

Generally, when a device that generates vibrations, such as a vehicle engine, is attached to a member to which it is attached, such as a board, it is necessary to install a device that generates vibrations, such as a vehicle engine, through a vibration-proof support that blocks the transmission of vibrations from the device to the member to which it is attached.
installed.

For example, as shown in FIG. 4, such a vibration isolating support a includes a main body made of an elastic material, a disk-shaped enlarged head C, and a cylindrical body d, which are connected to each other. It is known that the enlarged head C is formed with a metal cylindrical bush e fitted into the center hole.

The anti-vibration supports a are used as a set of two, and the anti-vibration supports a and the body parts d and d of a are placed in the mounting hole of the member to be attached (not shown) so as to face each other from above and below. A vibrating device such as a vehicle engine is placed on the upper anti-vibration support a, and the device is attached to the mounting member through the anti-vibration supports a and a to the cylindrical bushes e and e. By tightening and fixing the device with screw means such as a bolt inserted through the device, direct contact between the vibrating device and the attached member is prevented, thereby achieving vibration isolation.

However, in the above-mentioned vibration-proof support a, when the main body b (elastic body) of the vibration-proof support a is in direct contact with the peripheral edge (corner) of the mounting hole of the mounted member in the installed state, ,
If the main body is damaged at the peripheral end and receives a large force, stress concentration will occur particularly at the joint between the enlarged head C and the body d, which will cause cracks. .

Therefore, the peripheral edge of the mounting hole had to be chamfered.

Furthermore, the inner circumferential surface of the mounting hole also needs to be finished relatively smoothly to prevent the main body from being damaged during use.

The present invention has been devised in view of these points, and its main purpose is to eliminate the above-mentioned conventional drawbacks, improve installation workability, and provide a vibration-proof support with improved durability.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The configuration of the present invention will be described below with reference to the drawings.

In FIGS. 1 and 2, reference numeral 1 denotes a vibration isolating support, two of which are used as a set.

Reference numeral 2 denotes a cylindrical main body made of an elastic material such as anti-vibration rubber, and a metal bushing 4 is fitted into the center hole 3 of the main body.

This bushing 4 has a function as a spacer in the attached state, which will be described later.

On one side of this main body 2 in the axial direction (lower side in Fig. 2)
, an annular external wall 6 via a circumferential deep groove 5 opening on the negative side.
An annular inner wall 7 having a thinner wall thickness than the outer wall 6 is coaxially provided.

The end surface of the inner wall 7 is in contact with the road surface 8 on one side of the bushing 4, while the end surface 9 on the other side of the bushing 4 is in contact with the road surface.
The other end surface and the road surface.

Further, the end surface of the inner wall 7 is located inwardly, that is, above the end surface in FIG. 2, than the end surface of the outer wall 6.

Reference numeral 10 denotes a reinforcing member made of metal, which includes a cylindrical portion 11 fixed to the curved surface of the external wall 6, and an annular portion 12 with a substantially inverted U-shaped cross section embedded in the other end surface of the main body 2. The cylindrical portion 11 is extended from one side of the portion 12 to improve durability.

Note that the reinforcing member 10 may be made of synthetic resin depending on the purpose.

Next, a method for installing a vehicle engine using the vibration-proof support 1 will be described (see FIG. 3).

First, the external wall of the anti-vibration support 1.1 is inserted into the mounting hole 22, which has a diameter slightly larger than the cylindrical portion 11 of the anti-vibration support 1, drilled in the member 21 (mounting board) to be attached, from above and below. 6,6
(Cylindrical portion IL11) is inserted, and the tip surfaces of both external walls 6, 6 are brought into contact.

In this case, the cylindrical portion 11 of the metal reinforcing member 10 is fitted between the rows of the external wall 6, and the amount of insertion thereof is small, so that it can be easily inserted into the attachment hole 22.

Next, while maintaining the inserted state, upper and lower washers 23 and 24 are respectively applied to both end surfaces of the vibration isolating support 1.
5, and temporarily tighten with the tightening bolts 26 and nuts 27 (in this case, only the top surfaces of the external walls 6, 6 are in contact, and the top surfaces of the internal walls 7, 7 are in contact with each other). are separated).

Then, tighten the tightening bolt 26 and nut 27 onto the inner wall 7.
, 7, that is, the end surfaces 8, 8 of the bushes 4, 4, are fully tightened.

Then, the vibration isolating support 1 as a whole becomes slightly compressed in the axial direction.

In this way, the engine mounting base 25 is elastically attached to the attached member 21 via the two anti-vibration supports 1, 1, so engine vibrations are transmitted to the main body 2 of the anti-vibration support 1. It is efficiently absorbed and relaxed, and is hardly transmitted to the attached member 21.

In addition, since the reinforcing member 10 prevents direct contact with the peripheral edge (corner) or inner circumferential surface of the mounting hole 22, the peripheral edge may be chamfered or the inner circumferential surface may be smoothed. There is no need to do this, and the number of machining steps is reduced.

This direct contact can be prevented to prevent the occurrence of cracks, etc., and the action of the circumferential deep grooves 5 reduces shearing force at the interface between the outer wall 6 and the cylindrical portion 11, the interface between the inner wall 7 and the bushing 4, etc. (separation force) is absorbed and relaxed, the occurrence of damage to the main body 2 is significantly reduced, and as a result, the service life is significantly extended.

In the present invention, as described above, two pieces are used as a set, and a reinforcing member is provided on the outside of the part of the mounted member to be inserted into the mounting hole, so that insertion (mounting) into the mounting hole is extremely easy. Since the reinforcing member has an inverted U-shaped annular portion, direct contact with the peripheral edge of the mounting hole is prevented.
There is no need to round or chamfer the peripheral edges, reducing the number of processing steps, and furthermore, due to the synergistic effect of the reinforcing member and the circumferential deep groove, the occurrence of damage such as separation and cracking of each member is reduced. It has the excellent effect of extending the service life.

[Brief explanation of drawings]

1 to 3 illustrate embodiments of the present invention, in which FIG. 1 is a plan view of the vibration isolating support, and FIG. 2 is a
FIG. 3 is an explanatory view showing an attached state, and FIG. 4 is a cross-sectional view of a conventional vibration-proof support. 1... Anti-vibration support, 2... Main body, 3.
...Center hole, 4...Button, 5...
... Circumferential deep groove, 6... External wall, 7...
・Internal wall, 8, 9... end face, 10...
Reinforcement member, 11...Cylindrical portion, 12...
Annular portion, 21... Attached member, 22...
・Mounting hole, 23... Upper washer, 24...
...Lower washer, 25...Mounting stand, 26.
...Bolt, 27...Natsuto.

Claims (1)

[Scope of utility model registration request] A cylindrical main body made of an elastic material has a bushing fitted into a center hole, and an annular outer wall and an inner wall are coaxially connected to each other through a circumferential deep groove that opens on one side in the axial direction of the main body. The front end surface of the inner wall is located between the end surface of one side of the bushing and the road surface, and is located inward from the front end surface of the outer wall, and the end surface of the one side of the main body and the outer wall A reinforcing member is fixed along the outer circumferential surface of the main body, and the reinforcing member includes an annular portion having an inverted U-shaped cross section installed on one end face of the main body, and extending to one side of the annular portion. and a cylindrical portion fixed to the outer peripheral surface of the external wall.