JPS6023210Y2 - Anti-vibration rubber with stopper - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement in a vibration isolating rubber that is interposed between an internal combustion engine and a frame when an internal combustion engine is installed on the frame.

When a vibration generating member such as an internal combustion engine is supported by vibration isolating rubber, resonance inevitably occurs, so it is important to limit the resonance width from the viewpoint of safe operation of the device and damage prevention.

Therefore, in the past, a stopper was attached to limit the resonance width in addition to the anti-vibration rubber, but in this case, space and machining were required for attaching the stopper, which increased the number of parts and increased costs. I can't do it.

In addition, in order to reduce the number of parts, for example,
Some devices, such as the 603 device, use the coupling bolt of the device as a stopper, but it is not possible to adjust the amount of regulation of the vertical vibration width. It is extremely difficult to set accurately.

In addition, when installing different engines with different weights, the amount of deflection of the anti-vibration rubber at the time of engine installation (when the engine is not operating) will differ depending on the engine due to the difference in engine weight. However, with a device such as Utility Model Application Laid-Open No. 49-50603, which cannot adjust the amount of regulation of the vertical vibration width, it was not possible to set the amount of regulation so as to correspond to engines of different weights.

In other words, it is extremely difficult to use anti-vibration rubber for engines of various weights, and it lacks versatility.

The present invention attempts to solve the above conventional problems by using a part of the mounting bolt as a stopper and by making the vertical position of the mounting bolt freely adjustable. Its features are as follows. .

That is, the pair of inner surfaces for attaching anti-vibration rubber of the lower holder are formed symmetrically with respect to the center line of the holder so as to have an approximately upward-opening V-shape, and the inner surfaces for attaching a pair of anti-vibration rubber to the left and right of the upper holder are formed symmetrically with respect to the center line of the holder. is formed parallel to the inner surface of the lower holder so as to have a generally upwardly opening V-shape, and a pair of anti-vibration rubbers that are symmetrically inclined with respect to the center line of the holder are placed between the left inner surface and the right inner surface. A space with a certain width is formed between the left and right anti-vibration rubbers, a nut is fixed to the space side part in the center of the lower holder, and the nut is located in the space in a part of the upper holder above the nut. A downward-opening U-shaped groove is formed, and vertical side walls are formed at both left and right ends of the U-shaped groove that move away from the anti-vibration rubber toward the bottom. A portion of the lower holder is placed on the frame, and the lower holder is placed on the frame. Screw the stopper bolt inserted from below into the above nut so that its position can be adjusted in the vertical direction, position the upper end stopper in the U-shaped groove so that it extends a predetermined distance vertically and horizontally from the inner wall of the groove, and then tighten the mounting bolt. A locking nut screwed between the lower end head and the part between the frame tightens the lower holder to the frame and simultaneously locks the vertical position of the mounting bolt.

Next, an example is shown in FIG.

In FIG. 1, a holder (lower holder) 1 has a hole 2 in the center, and a nut 3 is welded to the upper surface of the hole 2 concentrically with the hole 2.

The mounting bolt 4 is screwed into the nut 3 through the hole 6 of the frame 5, and the holder 1 is fixed to the frame 5 by screwing in the locking nut 7 which is screwed into the bolt 4.

Reference numeral 8 denotes an upper metal holder (upper holder), and a bolt 9 is fixed to the upper center surface.The holder 8 is fixed to the bracket 10 by passing the bolt 9 through the hole 11 of the engine bracket 10 and screwing in the nut 12. can do.

A pair of left and right anti-vibration rubbers 15 are fixed to opposing inner surfaces 13 and 14 of the holders 1 and 8 by baking or other means.

The inner surfaces 13, 14 are inclined at the same angle with respect to the center line O-O of the anti-vibration rubber and are therefore parallel to each other, to which an anti-vibration rubber 15 of circular or square cross-section is glued at its flat end face.

The left and right anti-vibration rubbers 15.15 are symmetrical with respect to a plane perpendicular to the plane of FIG. It is formed.

The holder 8 is provided with a U-shaped groove 16 that opens downward at the lower end, and the bottom surface of the groove 16 and the upper end stopper part 4a of the mounting bolt 4 face each other with a distance apart, and the left and right side walls 1 of the groove 16
7.17 separates the stopper portion 4a from the gap and overlaps by a length h2.

In the embodiment shown in FIG. 1, a portion 4a of the stopper of the mounting bolt 4 is fitted into the groove 16 of the upper holder 8 in the space 18 between the left and right vibration isolating rubbers 15.15. ,
The spacing can be checked or measured from the front side (from the outside of the anti-vibration rubber).

Therefore, when installing the engine, insert the gauge into the groove 16 with the locking nut 7 loosened, move the mounting bolt 4 up and down to determine the spacing, and tighten the locking nut 7 to adjust the resonance width. can be regulated in advance.

In the case of the illustrated engine, resonance generally appears as a rolling phenomenon, so if the vibration isolating rubber with stoppers shown in FIG. 1 is used on both the left and right sides of the engine, the range of vibration can be freely restricted.

If resonance occurs at a certain rotation speed while increasing the engine speed to the set value or decreasing the engine speed from the set value, the upper holder 8 of the vibration-proof rubber with a stopper on the left side will close to the mounting bolt when rolling to the left. 4, and prevents the resonance width from increasing beyond a certain amount.

During rightward rolling, the upper holder 8 abuts against the stopper part 4a of the vibration isolating rubber with a stopper on the right side.
The swing width is determined.

The stopper part 4a in FIG.
has 0.

In this way, it is possible to prevent noise when the resonance width is limited by a portion of the stopper, and the operation becomes smooth.

The opposing inner surfaces 13 and 14 of the holders 1 and 8 in FIG.
It can also be an annular body having a space in the center with .

In that case, it will not be possible to check and measure the distance h from the outside, but after loosening the locking nut 7 and screwing it in until the top end of the bolt 4 touches the bottom of the groove 16,
The spacing can be determined by pulling out a certain amount, and the swing width can also be adjusted by rotating the mounting bolt 4 during engine operation.

As explained above, according to the present invention, (1) Using the vibration-proof rubber mounting bolt, a part of the waist-mounting bolt is used as a stopper for the mating holder, so the stopper can be incorporated into the vibration-proof rubber, reducing the number of parts. It is possible to provide a low-cost anti-vibration rubber with a stopper without the risk of an increase in

(2) Screw the mounting bolt 4 that also serves as a stopper into the nut 3 so that its vertical position can be adjusted freely, and tighten the lower holder 1 to the frame 5 with the locking nut 7, at the same time locking the vertical position of the mounting bolt 4. This makes it possible to easily and reliably adjust the amount of vertical vibration width regulation after the engine is installed.

That is, when the engine is installed on the upper holder 8, the anti-vibration rubber 15 is compressed to some extent from its natural state due to the weight of the engine, so the amount of regulation of the vertical vibration width (interval h) cannot be adjusted until after the engine is installed. Although it is not possible to set it accurately, with the present invention, the amount of regulation of the vertical vibration width can be easily and accurately adjusted by loosening the locking nut 7 and turning the mounting bolt 4 after the engine is installed. can be set to the optimum value for the vertical vibration of the engine, greatly improving its function as a stopper that limits resonance amplitude.

(3) The regulation amount of vertical vibration width can be adjusted after the engine is installed, so even when used to support various engines of different weights, the regulation amount of vertical vibration width can be set to the optimal value for each engine. can do.

In other words, it is highly versatile.

(4) O-shaped groove 1 that opens downward to the stopper part 4a
In addition, the stopper portion 4a and the O-shaped groove 16 are arranged in the center between the holders 8 and 1, resulting in a compact and simple structure, and moreover, it is resistant to vibrations in the left and right directions. It also has a stopper function.

(5) Vibrations in the vertical and horizontal directions can be easily absorbed by one vibration-proof rubber unit, and vibration widths in the vertical and horizontal directions can be easily regulated using the mounting bolts 4 and O-shaped grooves 16. can.

That is, the inner surface 1 for attaching vibration-proof rubber to each pair of both holders 1 and 8.
3.14 are formed symmetrically with respect to the holder center line O-O so that they each have an approximately upward-opening ■-shape, and the inner surface 1
3. Since l pairs of anti-vibration rubbers 15 which are tilted left and right symmetrically with respect to the holder centerline O-O are fixed between the holder center line O-O, one anti-vibration rubber unit can easily absorb vertical and horizontal vibrations. It can be absorbed.

Further, the upper end stopper part 4a of the stopper bolt 4 is positioned within the downwardly opening U-shaped groove 16 of the upper holder 8 at a predetermined interval in the vertical and horizontal directions.
It is also possible to easily regulate the vibration amplitude in the vertical and horizontal directions.

(6) Unnecessary deformation of the vibration-proof rubber 15 can be prevented during vibration in the left-right direction.

That is, since the side walls 17 at both ends of the 0-shaped groove 16 are vertically formed so as to move away from the vibration isolating rubber 15 as they go downward, the side walls 17 and the vibration isolating rubber are formed in a manner roughly proportional to the increase in the width of vibration in the left and right direction. This results in an increase in the contact area of 15.

Therefore, unreasonable compression and deformation of the vibration isolating rubber 15 can be prevented.

[Brief explanation of the drawing]

FIG. 1 is a vertical cross-sectional view of a vibration-proof rubber with a stopper according to the present invention, and FIG. 2 is a partial vertical cross-sectional view showing another embodiment. 1.8...Holder, 3...Natsuto,
4... Mounting bolt, 4a... Stopper part, 7... Field nut, 13, 14...
...Inner surface, 15...Vibration-proof rubber, 16...
... U-shaped groove, 18 ... space, h ...
·interval.

Claims (1)

[Scope of utility model registration request] The pair of anti-vibration rubber mounting inner surfaces 13 of the lower holder 1 are shaped symmetrically with respect to the holder centerline O-O so as to form an approximately upwardly opening V-shape, and the pair of left and right inner surfaces 13 of the upper holder 8 A pair of anti-vibration rubber mounting inner surfaces 14 are formed parallel to the inner surface 13 of the lower holder 1 so as to have an approximately upwardly opening V-shape, and are inclined symmetrically with respect to the holder centerline O-O. Place the anti-vibration rubber 15 between the left inner surface 14 and 13 and the right inner surface 14.
．． 13, a space 18 having a certain width is formed between the left and right vibration isolating rubbers 15, and a nut 3 is fixed in the space 18 side part at the center of the lower holder 1. The holder 8 portion is formed with a downward-opening 0-shaped groove 16 located within the space 18, and vertical side walls 17 are formed at both left and right ends of the 0-shaped groove 16, which move away from the vibration isolating rubber 15 as they move downward. Then, place the lower holder 1 part on the frame 5,
Stopper bolt 4 inserted from the bottom of frame 5
is screwed into the nut 3 so that its position can be adjusted in the vertical direction, and the upper end stopper portion 4a is positioned in the O-shaped groove 16 so as to be apart from the inner wall of the groove by a predetermined distance vertically and horizontally, and the lower end head of the mounting bolt 4 is inserted into the nut 3. This anti-vibration rubber with a stopper is characterized in that the lower holder 1 is tightened to the frame 5 and at the same time the vertical position of the mounting bolt 4 is locked by a locking nut 7 screwed into the part between the frame 5 and the lower holder 1.