JP4715673B2 - Vibration isolator for vehicle - Google Patents

Description

  The present invention relates to a vibration isolator for a vehicle used when a vibrating body is attached to a vehicle, and is suitable for application to attachment of an electric compressor to a vehicle, for example.

  An electric compressor fixed to a vehicle body (vehicle body) generally suppresses transmission of vibration of the electric compressor to the vehicle and suppresses transmission of vehicle vibration to the electric compressor. An elastic support member such as rubber is fixed to the vehicle body via a so-called anti-vibration rubber.

  However, as disclosed in Patent Document 1, the conventional anti-vibration rubber uses a solid substance of the rubber, so that an elastic coefficient (spring constant) is excessive and an effective anti-vibration function is not achieved. It was. In particular, a sufficient anti-vibration function was not exhibited against vibrations generated during operation of the electric motor.

  As a countermeasure, as disclosed in Patent Document 2, it is conceivable to employ a vibration-proof rubber having a hollow portion and having an outer periphery curved outward (see FIG. 6). However, the technology disclosed in Patent Document 2 relates to a vibration isolator for a backpack engine, and this vibration isolator has a vibration isolating function due to the presence of a curved portion in the vertical direction of the vibrating body. In the horizontal direction, it does not have an anti-vibration function. For this reason, this vibration isolator has an insufficient vibration isolating function. That is, since the vibrating body also generates horizontal vibrations, the passenger feels uncomfortable in the vibration isolator for the vehicle when this is not suppressed.

  Further, the technique disclosed in Patent Document 2 does not have a means for regulating excessive displacement of the vibration isolating rubber with respect to the vertical direction or horizontal direction of the vibrating body. For this reason, it cannot be employed in a vibration isolator for a vibrating body mounted on a vehicle traveling on a rough road. This is because the vibration-proof rubber having the hollow portion may cause excessive displacement when traveling on a rough road, and when this is not restricted, the attachment portion of the vibrating body or the vibrating body itself may be damaged.

JP 2003-278833 A JP 2003-28240 A

  The present invention has been made in view of the above problems, and an object of the present invention is to control an excessive displacement of the vibration isolating rubber and to provide a vehicle vibration isolating function having a vibration isolating function in the vertical direction and the horizontal direction of the vibrating body. Is to provide a device.

The present invention provides a vibration isolator for a vehicle according to each of the claims as means for solving the problems.
According to the first aspect of the present invention, the vehicle vibration isolator is provided with a displacement restricting means for restricting the displacement of the elastic support member. Accordingly, it is possible to regulate an excessive displacement of the elastic support member, and the attachment portion of the vibrating body or the vibrating body itself is not damaged by the excessive displacement.

Furthermore, according to the invention described in claim 1 , the vehicular vibration isolator is characterized in that the cross section of the central portion of the elastic support member is M-shaped. As a result, the elastic support member has a vibration isolating function in the horizontal direction, and it is possible to suppress the horizontal vibration of the vibrating body from being transmitted to the vehicle body side, so that the passenger does not feel discomfort due to this. .

According to the second aspect of the present invention, the vehicular vibration isolator is characterized in that the inner cylinder or the second plate that surrounds the column body is the displacement regulating means. As a result, it is not necessary to newly provide a displacement restricting means, so that the number of parts is not increased.

According to the invention described in claim 3 , the first plate is provided with a through hole through which the support body passes and the elastic support member passes, and the locking member is provided with a flange. The diameter of the hole is smaller than the diameter of the flange. Thereby, even if the elastic support member is broken, the vibrating body is not detached from the vehicle body.

(First embodiment)
Hereinafter, a first embodiment of the present invention will be described with reference to FIGS. 1 and 5. FIG. 1 is a sectional view of a vibration isolator 100 according to the first embodiment of the present invention, and FIG. 5 is an overall view showing a state in which the vibration isolator 100 is attached to a vehicle.

  In FIG. 5, reference numeral 1 is a metal first plate that supports a vibrating body, 2 is a second metal plate attached to the vehicle body, 50 is an electric compressor (vibrating body), and 100 is a main plate. It is a vibration isolator which concerns on 1st Embodiment of invention. The vibration isolator 100 can suppress vibration transmission from the electric compressor to the vehicle body and vice versa.

  In FIG. 1, reference numeral 3 is an anti-vibration rubber (elastic support member), 4 is a metal bolt (post), 5 is a metal flange nut (locking member), and 6 is a metal collar (inner cylinder). ), 7 is a stopper (displacement restricting means) for restricting the vertical displacement of the anti-vibration rubber 3. The anti-vibration rubber 3 is manufactured from a rubber material such as EPDM, and the stopper 7 is manufactured from a resin (including rubber).

  The anti-vibration rubber 3 is sandwiched between the first plate 1 and the second plate 2, a contact portion 3 a that contacts the stopper 7, a curved shape portion 3 b that protrudes outward, and a central portion thereof. It has an M-shaped cross section 3c and a hollow portion 3d. The first plate 1 is sandwiched between vibration-proof rubber shoulders 3h and has a hole 1a through which the vibration-proof rubber 3 passes. The second plate 2 is in contact with the bottom portion 3g of the vibration isolating rubber.

  The abutting portion 3a has a role of cooperating with the stopper 7 to restrict the vibration isolating rubber 3 from being displaced more than a predetermined distance about y in the vertical direction. When the anti-vibration rubber 3 bends in the vertical direction, the curved shape portion 3b has a shape that can be easily returned to the original state by a restoring force, and can be stably bent. . The curved shape portion 3b may be a refractive shape instead of this shape, and these shapes may be multi-staged, and may be convex or concave outward.

  The M-shaped cross section 3c has a shape that can reduce the spring constant in the horizontal direction due to the presence of the hollow portions 3e and 3f. The cross-sectional shape of the M-shaped cross-section 3c can be rephrased as two lightning shapes or a combined shape of an N-shape and an inverted N-shape. The cross-section 3c has a shape that can be easily returned to the original state by a restoring force when the anti-vibration rubber 3 bends in the horizontal direction, and can be stably bent. This is because the vibrating body vibrates in the horizontal direction. Further, due to the presence of the hollow portions 3e and 3f, the anti-vibration rubber cannot be displaced more than the predetermined distance about x in the horizontal direction.

  The hollow portion 3d is provided in order to reduce the vertical spring constant of the anti-vibration rubber 3.

  The collar 6 surrounds the metal bolt 4. The metal bolt 4 fastens the second plate 2 and the collar 6 in cooperation with the metal flanged nut 5. The flexible vibration isolator 3 is supported by this fastening body. In other words, this fastening body serves as a bone, and it can be said that the anti-vibration rubber 3 serves as a meat. When the vehicle body vibration occurs, the fastening body follows the vehicle body vibration almost as it is.

  And the diameter D1 of the flange 5a of the nut 5 with a flange is larger than the diameter D2 of the through-hole 1a which the bolt 4 penetrated and the anti-vibration rubber 3 passed to the 1st board 1. Thereby, even if the anti-vibration rubber 3 is broken, the vibrating body 50 is not detached from the vehicle body.

  The stopper 7 has a contact portion 7a that contacts the contact portion 3a of the vibration isolating rubber 3 when the vibration isolating rubber 3 is displaced maximum in the vertical direction, and a lip that holds the stopper 7 in close contact with the collar 6. Part 7b.

(Second Embodiment)
Next, a second embodiment of the present invention will be described based on FIG. FIG. 2 is a cross-sectional view of a vibration isolator 200 according to the second embodiment of the present invention. The same members as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted. The second embodiment substantially changes only the displacement restricting means for restricting the displacement of the anti-vibration rubber 3 in the first embodiment.

  Reference numeral 8 is a resin (including rubber) stopper, which is integrally molded as an insert when molding a vibration-proof rubber. Displacement of the anti-vibration rubber 3 is restricted between the resin stopper 8 and the bottom of the collar 6. Thereby, the stopper 7 of 1st Embodiment becomes unnecessary and it becomes possible to reduce a number of parts.

(Third embodiment)
Next, a third embodiment of the present invention will be described with reference to FIG. FIG. 3 is a cross-sectional view of a vibration isolator 300 according to the third embodiment of the present invention. The same members as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted. The third embodiment substantially changes only the displacement restricting means for restricting the displacement of the vibration isolating rubber 3 in the first embodiment.

  Reference numeral 9 is a metal collar also serving as a stopper function. The displacement of the anti-vibration rubber 3 is restricted between the abutting portion 9 a of the metal stopper 9 and the abutting portion 3 a of the anti-vibration rubber 3. Thereby, the stopper 7 of 1st Embodiment becomes unnecessary and it becomes possible to reduce a number of parts.

(Fourth embodiment)
Next, 4th Embodiment of this invention is described based on FIG. FIG. 4 is a cross-sectional view of a vibration isolator 400 according to the fourth embodiment of the present invention. The same members as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted. The fourth embodiment substantially changes only the displacement restricting means for restricting the displacement of the vibration isolating rubber 3 in the third embodiment.

  The 2nd board 2 combines the function of the collar 9 in 3rd Embodiment besides the board function attached to the vehicle main body which is an original function. For this reason, the 2nd board 2 is the said displacement control means. That is, the displacement of the vibration isolating rubber 3 is restricted between the abutting portion 2 a of the second plate 2 and the abutting portion 3 a of the vibration isolating rubber 3. Thereby, the stopper 7 of 1st Embodiment becomes unnecessary and it becomes possible to reduce a number of parts.

  As described above, it is possible to provide a vehicle vibration isolator that restricts excessive displacement of the vibration isolating rubber and has a vibration isolating function in the vertical direction and the horizontal direction of the vibrating body.

It is sectional drawing of the vibration isolator which concerns on 1st Embodiment of this invention. It is sectional drawing of the vibration isolator which concerns on 2nd Embodiment of this invention. It is sectional drawing of the vibration isolator which concerns on 3rd Embodiment of this invention. It is sectional drawing of the vibration isolator which concerns on 4th Embodiment of this invention. It is a general view showing the state which attached the vibration isolator which concerns on this invention to the vehicle. It is sectional drawing of the vibration isolator of a prior art example.

Explanation of symbols

100 Anti-Vibration Device According to First Embodiment 1 First plate 2 Second plate 3 Anti-vibration rubber

Claims (3)

A first plate (1) supporting the vibrating body (50);
A second plate (2) attached to the vehicle body;
An elastic support member (3) sandwiched between the first plate and the second plate ;
In the vibration isolator for a vehicle having a support body (4) and a locking member (5) that penetrate the first plate and sandwich the second plate in the central portion of the elastic support member,
The elastic support member (3) has a first hollow portion (3d) and the outer periphery (3b) is curved or refracted, and the cross section (3c) of the central portion of the elastic support member (3) is M-shaped. A second hollow portion (3e) and a third hollow portion (3f) are formed on both sides of the inclined member constituting the M-shape,
Furthermore, the vehicle vibration isolator is provided with displacement restricting means (2a, 7, 8, 9a) for restricting displacement of the elastic support member (3). The vehicular vibration isolator according to claim 1 , wherein the inner cylinder (6, 9) or the second plate (2) surrounding the column body (4) serves as the displacement restricting means. The first plate is provided with a through hole (1a) through which the support body (4) passes and the elastic support member (3) passes, and the locking member (5) has a flange (5a). The vehicle vibration isolator according to claim 1 or 2 , wherein a diameter (D2) of the through hole is smaller than a diameter (D1) of the flange.

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