JPS5888245A - Vibro-isolating device - Google Patents

Abstract

PURPOSE:To secure stabilized quality in a product even if there are some variations in spring constant, etc., by holding even in time of setting a vibro-isolating device additionally, those clearances set up uniformly between a vibro-proof element and a movable member during the molding process. CONSTITUTION:A bolt 19 of a vibro-proof element 7 is inserted into the setting hole of a frame and, after clamping thereat, a power unit is clamped as supported by a attaching device 13. If doing so, due to the static load of the power unit, a movable member 9 slides toward the bound side via an elastic member 25 and at this time relationships between a clearance ClB at the bound side and a clearance Clr at the rebound side lying between the vibro-proof element 7 and the movable member 9 are maintained in an almost identical to the state when they were molded. Under this state, if this device is coupled to the frame with a bolt 27a of a fixing device 27, both clearances ClB and Clr come to be almost identical so that stable vibro-isolating performance can be secured.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a vibration isolating device that supports a vehicle body (a power unit that is damaged by an engine, a transmission, etc.) and performs vibration isolation.

An example of a conventional vibration isolator is shown in FIG. This figure shows a state before the conventional vibration isolator 11i shown in No. 11k is interposed between the vehicle body and the power unit, and is composed of a vibration isolator 507 and a movable member 509. The vibration isolator 507 is a vehicle body 1ull attachment 51.
A vibration isolating rubber body 515 is integrally provided between the power unit side fixture 513 and the power unit side fixture 513 by vulcanization molding. The movable member 509 faces both sides of the vibration isolator 507 so as to maintain a constant gap C4, cz7'' t-, and is integrally provided with a vibration isolator unit side fixture 511. The gap between the vibration isolator 507 and the movable member 509 is formed in advance such that one side is large and the other force is small.Such a vibration isolator is, for example, In this case, the power unit is supported by the power unit side fixtures 513 of the N5 vibration isolators 507 which are diagonally interposed between the right and left lower portions of the power unit 503 and the vehicle body, and the single body side fixtures 511 are added to the vehicle body Kti!11. At this time, the movable member 509 on the side facing the vibration isolator 507 with a large gap ctB is arranged in a lower position.
Movable member 5 on the side facing each other with a small space @Ctr
09 is placed at upper 911+. Therefore, when the static load of the power unit is applied to the vibration isolating rubber body 515 of the vibration isolator 507, the vibration isolating rubber body 515 bends toward the lower bound side (hereinafter referred to as the bound side), and the gap CAB on the bound side and the rebound side The gap (7) is almost equal.

By the way, with the vibration isolator interposed between the vehicle body and the power unit, the bound side gap CA
The reason why B and the gap C1l on the rebound side are made equal is as follows. First, when the vibration isolating rubber body 515 absorbs minute vibrations of the power unit, the vibration isolating rubber body 515 vibrates minutely with equal amplitude to the bound side and the rebound side, and then this minute vibration is not transmitted to the movable member 509. Inquiry on the bounce side and rebound side @CAB, CL (
It is necessary to maintain f. However, for example, when the power unit rolls and the vibration isolating rubber body 515 tries to deflect greatly toward the pound side or rebound side, the K that effectively prevents this is the inner gap C1B.

It is desirable to keep CtrW as small as possible and to reduce the displacement of the power unit. Therefore, while considering the amplitude of the minute vibrations mentioned above during vibration absorption, the internal gaps CAB and CLr are set so that they are equal when subjected to the static load of the power unit. Therefore, the condition that the internal gaps are equal is that the vibration isolating rubber body 515 has a large m on the bounce side and the rebound side.
Extremely heavy duty 1j to effectively perform both blocking and absorption of minute vibrations of the power unit! ! It should be said that it is something.

However, when the vibration isolator is installed between the vehicle body and the power unit, the inner gap αB is adjusted at the time of molding in consideration of the static load of the power unit so that the inner gaps αB and ctr are equal. , Large in advance to CLr.

Even if a small difference is provided, the internal gap CLB will be removed when intervening.

This often led to the problem that CL was not necessarily equal and unstable. That is, the large and small internal gaps CLB and CL1- are caused by the static load of the power unit on the vibration isolating rubber body 51.
Even if the deflection fi of 5 is preliminarily set mj and uniformly n, the spring constant of the vibration isolating rubber body 515 may vary slightly depending on the individual vibration isolators. This is due to the fact that there are variations in the power unit.

This invention was devised in view of the above problems, and even if there are variations in the static load of the spring constant power unit of the vibration isolator, the vibration isolator and movable member that are uniformly set at the time of molding can be The present invention provides a vibration isolator that can maintain the gap between the vibration isolators even when the vibration isolators are interposed, and that can provide stable quality with each vibration isolator.

In order to achieve this object, the present invention connects a single flying power unit through an elastic part, and
'L - A supporting vibration isolator, and a movable member that is movable relative to the vibration isolator in a direction in which the vibration isolator is displaced by the static load of the power unit when facing the side of the vibration isolator. and an elastic member having a smaller elastic modulus than the elastic part of the vibration isolator and connecting the movable member to the vehicle body side;
The movable member is in a displaced state, and the movable member is provided with a fixture for fixing the movable member to the vehicle body.

Hereinafter, one embodiment of the present invention will be explained in detail based on the accompanying drawings.

The vibration isolating device according to the embodiment of the present invention is designed to avoid the second cause by K, for example, the left and right K (right and left in FIG. 2) of 7 frames L of the vehicle body (not shown) when viewed from the front side of the vehicle They are fixed and set so that they face inward from each other. Power unit 3 consists of engine, transmission, etc.
is the vibration isolator f fixed to the left and right lower brackets 5.
i[Supported.

The vibration isolator thus interposed between the vehicle body and the power unit 3 has a grooved bottom as shown in FIG.

This vibration isolator* is explained with it removed from between the frame l and the power unit 3, and the vibration isolator 7 and the mouth
It is composed of material 9.

The vibration isolator 7 is provided between the vehicle body and the power unit 3 to support the static load of the power unit 3. In this vibration isolator 7, a vibration isolator 15, which is an elastic part, is integrally provided between the vehicle body side attachment 11 and the power unit noble attachment 13 by forming. The front vehicle body side attachment llFi has a rectangular plate shape, and the lower 1!1 (83
A circular depression 1117 is provided that protrudes to the right side in the figure (see FIG. 4). #1 of the frame 1 of this recessed portion 17 is formed flat. This cave-in lol
A 17m common hole is provided in the center of #617,
From this common hole 17m, the threaded portion of the hole 19 protrudes seven frames. Power Units) [j1
Attachment X13 has a rectangular plate shape, and rising portions 13m in the direction of the tilting force, which are the bound side and the rebound side, are integrally formed by bending (see Fig. 4). A common through hole 13b is provided in the center wA of this power unit holder 13, and from this common through hole 13b, the threaded part of the pole 21 is connected to the power unit 3 on the upper side (the hole with which the hole is attached). 3) It is projected to the upper left corner of the middle @).

The mouth J-moving member 9 is housed so as to face the side of the anti-cheese tool 7. Specifically, on the bounce side and the rebound side of the vibration isolator 7, there is provided a Bakundo stopper s9m.
and a rebound stopper part 9b are provided.

These two stopper portions 9m and 9b are integrally bent and formed with a sliding portion 9C arranged in parallel to the frame 111 of the vehicle body side attachment 11 of the vibration isolator 7 using a plate-like member. (See Figure 4). A long hole 23 extending toward the bound side and the rebound side is formed approximately in the center of the sliding member W9C. The short half of the elongated hole 23 is formed to be slightly larger than the outer circumferential radius of the recessed portion 17 of the vehicle body side attachment 11. Therefore, the movable member 9 is configured to be slidable in the direction of approaching and separating from the vibration isolator 70, in other words, in the direction of the bound side and the rebound side. On the inside of both the stoppers 1519m and 9b, in other words, on the surface facing the vibration isolator 7, there is a stopper rubber body 9d.
, 9e is vulcanized and molded.

An elastic member 25 is provided between the movable member 9 and the vibration isolator 7. Both elastic members 25t'i, low lll
The anti-vibration rubber body 15 and the upper ends of the stopper rubber bodies 9d and 96 are connected to each other in the form of a bridge. This elastic member 25#'i is arranged to be substantially perpendicular to both stopper parts 9&*9bK. In this state, in the sliding state of the movable member 9, the vibration isolator 7 and the movable member 9
In other words, there is a constant gap CL B -C4 between the vibration isolating rubber body 15 and the stopper rubber bodies 9d and 9e.
is retained. In this embodiment, the bound side gap C
AB and IJ bound side gaps CL are both formed equally, and are set to the minimum in consideration of vibration sr when the vibration isolating rubber body 15 absorbs vibrations of the power unit 3 and vibrates slightly.

A bolt 27a of the fixture 27 is attached to the oJ moving member 9. This bolt 27& is located at both sides of the elongated hole 23 in the sliding portion 9CK of the movable member 9, and at the sliding portion 9C.
The threaded part is attached to the frame 1 of the vehicle body.
It is installed protruding to lil.

When the surface of the recessed part 17 of the vibration isolator 7 on the frame l side and the surface of the sliding part 9C of the movable member 9 on the 7th frame l side are flush as shown in FIG. There is a gap between the mounting bracket 11 and the vehicle body 27a. and,
In this position, the movable member 90 is fixed by the nut (not shown) of the frame IVC fixture 27 at the sliding position where the movable member 90 is fixed due to the static load of the power unit, and the movable member 9 is moved in the lateral direction of the vibration isolator 7, in other words. If the movable member 9 is slid, it is possible to prevent the bending of the movable member 9 from exceeding a predetermined value to the bound side or the rebound side.
%, it goes without saying that a long hole (not shown) is provided in the frame 1 to allow the bolt 27a to follow.

The frame 111 of the movable member 9 includes a movable member 9? l
- A slidably supporting grate 29 is provided.

This plate 29ilt,)1 has a rectangular shape and is in contact with the frame 1 of the sliding portion 9C of the movable member 9. A hole 29a through which the bolt 19 of the vibration isolator 7 passes is provided approximately at the center of the plate 29.
An elongated hole 29b is provided on the bounce and rebound side of a to allow the fixing member 27 to pass through. Therefore, when the pole 27m follows the sliding movement of the movable member 9, it can move within the elongated hole 29b. Note that this plate 29 does not necessarily need to be provided.

Next, the operation of the above embodiment will be described.

1. First, fix the Kg-shaped vibration isolator to the frame IK of the vehicle body as shown in Fig. 3. In other words, the vibration isolator 7 pol) 19
4-.Insert the frame 1 into the mounting hole (-not shown) and secure with a nut (not shown). At this time, the vibration isolator WL
For example, as shown in FIG. 2, the bounce stopper part 9a is set diagonally on the left and right of the 7 frame l of the car body when viewed from the vehicle body (r70). The parts 9b are arranged on the slopes respectively.The parts 9b and 27m of the fittings 27 are respectively arranged on the slopes @.
The movable member 9 is inserted into a long hole (not shown) with its sliding portion 9C supported by the plate 29, and on the bound side,
It can be slid freely towards the rebound side.

In this state, the power unit 3 is attached to the second vibration isolator 7.
Support as shown. That is, the entire bracket 5 of the power unit 3 is supported by the power unit side fixture 13 and fastened and fixed with a nut (not shown) K. Therefore, the static load of the power unit 3 is applied to the vibration isolating rubber body 15 via the bracket 5 and the power unit flit fixture 13. Then, the vibration isolating rubber body 15 bends toward the bound side. This deflection causes the movable member 9 to slide toward the bound side via the elastic member 25. This effect becomes even clearer when we look at the 5th ward. This Fig. 52 shows the principle, and the corresponding groove bottom portions are denoted by the same reference numerals. When the movable member 9 moves toward the bound side, the movable member is The sliding movement is not blocked by the recessed portion 17, and the bolt 27JL of the fixture 27 moves within the elongated hole 29b1 of the plate 29 and the elongated hole of the frame 1. When the vibration isolating rubber body 15 comes to rest, the movable member 9 also comes to rest, and the bound side gap CLB and rebound side gap C1f between the vibration isolator 7 and the movable member 9 are in almost the same state as during molding. The K is almost the same for both the internal gaps CLE and CLy. In this state, the pole of fixture 27) 27m
The installation of the vibration isolator is completed by tightening the K-nut (not shown). When the power unit 3 vibrates minutely, the internal gaps on the bound side and the rebound side are almost equal, so only the sum of the stoppers on one side of the power unit 3 comes into contact, and the minute vibrations are not transmitted to the frame 1.K, and the vibration damping resonance 15 Absorbs minute vibrations and improves vibration isolation. In addition, although the vibration isolating rubber body is slightly vibrated, since the elastic member 25 has low rigidity, the town #! Effectively absorbs slight vibrations to the IJill material 9. When the vibration isolator 7 tries to deflect greatly toward the bound side or the rebound side, the elastic member 25 easily deflects and the vibration isolator rubber body 15 comes into contact with the stopper rubber bodies 9d and 9eK, and the deflection exceeding a predetermined value causes the F+J moving member Part 9 of stopper 9
m, 9 bK is blocked.

In addition, when the vibration isolating rubber body 15KI9T fully opens due to changes over time, the spring constant changes and the bound side gap @ C1B and the rebound side gap Ctr change [tl, the bolt 27m of the fixture 27 is loose] If Th is loosened, automatic vI of internal CAB, CL, .
Four verses are performed. After that, if you tighten the nut again, it will return to its original state, making it easy to adjust the bed.

FIG. 6 shows a second embodiment, in which frictional force is utilized as the elastic member 125. On the bounce side of the anti-vibration rubber body 15, on the rebound 1Ill,
An appropriate number of fin-shaped protrusions (125m in Figure 6) on the side of the power unit are attached to a 9m part of the bound side stopper.
, a portion of the rebound side stopper is provided to protrude toward the direction 9b. Then, in order to face the fin-shaped protrusions 125mK, a part of the bound side stopper 9m, a part of the rebound side stopper 9b6C, and an appropriate number (41 directions for the 6th fat) of fin-shaped protrusions 125b are arranged in the direction of the vibration isolator 7. It is installed protruding into. These protrusions 125m and 125b have their tips V! 5 are fitted between the protrusions of each other to form a stopper rubber body 109d.
, 109・ and the projection 125&, the bound side gap CI
B. Rebound side curtain CL.

is formed. Note that other components are almost the same as those in the above embodiment, so they are designated by the same reference numerals and explanations will be omitted.

In this embodiment, when the vibration isolating rubber body 15 bends toward the bound side due to the static load of the power unit 3, the protrusions 125m, 12
Through the frictional force between 5b, the material 9 is slid and bound side gap CtB, rebound 111 rkJ:J
An automatic clause is performed to keep Illj CL constant. The vibration isolator 15 absorbs minute vibrations of the power unit 3,
In addition, the animal housing between the protrusions 125a and 125b slips 9 and the slight vibration of the vibration isolator 7 is not transmitted to the town IIJJ member 9, and the vibration isolator 47) (land equipment, rebound gear) When doing so, the protrusion 125m abuts against the stopper rubber bodies 109d and 109eK, and the deflection is prevented.

Note that the other functions are the same as those in the above-mentioned *Embodiment, so the explanation will be omitted.

FIG. 7 shows the third fs, an embodiment, and in this embodiment, as the elastic member 225, a rubber body 20ga, 2
The stopper rubber bodies 209d and 209e are in contact with the power unit t in a vibration-damping manner since before they were attached to the power unit t. Stotsunoku - Rubber body 209d, 209eti, vibration isolator 7IIl
The cross section of the light #11 is gradually formed into a chevron shape, and the top portion thereof is in contact with the vibration isolating rubber body of the vibration isolator 7. This stopper rubber body 209d-209emus is provided with a bound side gap C1B and a rebound gap Ctr. Note that the other configurations are almost the same as those of the above embodiment, so they will be designated by the same reference numerals and the explanation will be omitted.

In this embodiment, when the vibration isolating rubber body 15 bends toward the bound side due to the static load of the power unit 3, the stopper rubber body 2
The movable member 9 slides through the bound side cg1.09d and 209ek. v bound side hearing @ ctr t-
Automatic adjustment is performed to keep it constant. When absorbing vibration of the power unit 3, the stopper rubber bodies 209d and 20
Since 9e absorbs the minute vibrations of the vibration-proof rubber body 15 by slightly deforming in the direction of crushing the gap Wi CIE and C1r, the vibrations are not transmitted to the movable member 9. Vibration isolator 7
When the body tries to deflect greatly toward the bound side or the rebound side, the bound medullary artery CAB and the rebound sacral space CTL collapse to prevent the deflection. In addition, other effects are described above ii [2
The detailed explanation, which is the same as in the example, will be omitted.

Note that this invention is not limited to the above embodiment Vc, and the elastic member having a rigidity equal to or less than that of the vibration isolator can maintain the gap between the vibration isolator and the movable member when the movable member slides. ,
Further, when absorbing vibrations of the power unit, the number of places to provide them is not limited as long as the vibration damping does not transmit minute vibrations to the movable member.

Therefore, the elastic member may be provided perpendicularly to the plane of the paper in the figure so that the load of the power unit is applied to the elastic member as a shearing load. In this case, the vibration damping properties are further improved. moreover,
It may be provided only on the rebound side.

As described above, the present invention connects a vehicle body and a war unit with an elastic part, and a vibration isolator that supports the war unit and a vibration isolator that faces the side of the vibration isolator. , a movable member movable relative to the vibration isolator AK in a direction in which the vibration isolator is displaced by the static load of the power unit; and a movable member having an elastic modulus smaller by /J% than the elastic portion of the vibration isolator; Since it is equipped with an elastic member that connects the movable member to the single body side, and an identification tool that fixes the movable member to the vehicle body when the movable member is displaced, it is possible to connect the excavation prevention device to the vehicle body and the power unit without fixing the movable member. If the vibration isolator is interposed between the Therefore, the gap between the vibration isolator and the movable member can be maintained at 1"lk when molding the vibration isolator. Therefore, if the movable member is fixed with the fixture as it is, the elasticity of the vibration isolator will be reduced. Even if there are variations in coefficients and variations in power unit load, the gap between the vibration isolator and the movable member can be kept constant when the power unit is under static load, and vibration isolation against minute vibrations can be improved. .Also, when the vibration isolation damps due to changes over time and the gap changes, K t;j
Maintenance is easy because the original gap is automatically restored by loosening and retightening the fixture.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing a conventional vibration isolator, FIG. 2 is an explanatory drawing showing the interposed state of the vibration isolator, and FIG. 3 is a cross section showing a vibration isolator according to an embodiment of the present invention. Fig. ag4 is an exploded perspective view showing movable members etc., a fifth factor principle diagram, Fig. 6 is a sectional view showing the vibration isolator it of the second embodiment of the present invention, and Fig. 7 is a diagram showing the vibration isolator it of the second embodiment of the present invention. FIG. 7 is a cross-sectional view showing a vibration isolator according to a third embodiment. (Explanation of symbols of main parts in the diagram) l... Frame (vehicle body) 3-... Power unit 7... Vibration isolator 9... Movable member 15
... Vibration-isolating rubber body < m-shaped part) 25.125,225--Elastic member 27... Fixture patent applicant Nissan Motor Co., Ltd. Figure 1 Figure 2 Figure 3 Figure 3

Claims (1)

[Claims] A vibration isolator that connects the vehicle body and the power unit via an elastic part and supports the power unit faces the side of the vibration isolator and is displaced by the static load of the power unit. a movable member that is movable relative to the vibration damper in a direction, an elastic member that has a smaller elastic coefficient than the elastic portion of the vibration damper and connects the front Me movable member and the vehicle body side, and a displacement of the movable member. A vibration isolating device comprising an identification tool for fixing a movable member to a single unit in good condition.