JPH0430440Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] This invention relates to a liquid-filled mount, and in particular,
The present invention relates to a liquid-filled mount that can obtain optimal dynamic spring constants and damping characteristics in response to vibrations from internal combustion engines and the like.

[Prior art and its problems]

In general, in order to minimize the transmission of vibrations from a vibration source such as an internal combustion engine to external components that support it, a liquid-filled mount is used to damp vibrations from the vibration source. A liquid-filled mount for damping such vibrations is shown in FIG.

The liquid-filled mount shown in Fig. 5 is
A main body part 2 having a threaded part 1 that receives vibration input from a vibration generating source such as an internal combustion engine (not shown); an elastic body 4 connected to the main body part 2 via a fixing member 3; an orifice plate 5 disposed opposite to the inner wall surface of a cavity hollowed out in the center of the orifice plate 5, and having a plurality of holes 5a bored in the upper surface;
A first chamber 6 is formed between the orifice plate 5 and the elastic body 4, and a spiral groove 7a is provided on the circumferential surface of the orifice plate 5. A disc-shaped orifice body 7 is formed with an orifice 11 opening on the upper surface of the orifice plate 5, and has a plurality of holes 7b facing the plurality of holes 5a of the orifice plate 5.
An auxiliary diaphragm 8 located in the space between the upper surface and the upper surface of the disk-shaped orifice body 7, a main diaphragm 9 disposed opposite to the bottom surface of the disk-shaped orifice body 7, and this main diaphragm 9. A second chamber 10 is formed between the disk-shaped orifice body 7 and communicates with the first chamber 6 via the orifice 11. is filled with liquid.

Regarding the operation of the conventional liquid-filled mount configured as described above, first, when vibrations from a vibration source such as an internal combustion engine are input to the main body part 2 through the threaded part 1, the vibrations are It is received by the elastic body 4 and attenuated, and the elastic body 4 is pushed downward, and when the input vibration is a low frequency, the first vibration is
Reduce chamber 6.

Therefore, the liquid inside the first chamber 6 is pushed downward, flows into the inside of the spiral orifice 11 through the hole in the orifice plate 5, flows inside this orifice 11, and flows into the second chamber 10. It's becoming like that.

Therefore, the internal volume of the second chamber 10 is increased together with the liquid filled inside the second chamber 10, thereby pushing down the main diaphragm 9, and in this way. The liquid inside the second chamber 10, whose volume has been increased, flows into the first chamber 6 via the orifice 11 again, and this process is repeated.

And, as mentioned above, the first chamber 6 and the second chamber 10
The vibration from the vibration source is damped by the resistance when the liquid flows through the orifice flow path between the

Further, when the input vibration is a high frequency, the auxiliary diaphragm 8 located in the space between the upper surface of the orifice plate 5 and the upper surface of the disk-shaped orifice 7 is pushed through the holes 5a and 7b. The diaphragm 8 is moved and deformed within a small gap to damp vibrations.

However, in the conventional liquid-filled mount configured as described above, the groove 7a is formed between the orifice plate 5 and the groove 7a spirally provided on the circumferential surface of the disc-shaped orifice body 7. If the length of the orifice 11 that communicates between the first chamber 6 and the second chamber 10 is constant, and the frequency of the vibration source such as an internal combustion engine to which the liquid-filled mount is attached differs, for example, However, when the internal combustion engine rotates and the vibrations change sequentially, the vibration frequencies differ, so there is a problem in that it is not possible to obtain the optimum dynamic spring constant or damping characteristic.

This invention solves the problems of the conventional ones as mentioned above, and by making it possible to change the length of the orifice or by eliminating the shield between the liquid chambers, it can be adjusted to the frequency of the internal combustion engine. The objective is to provide a liquid-filled mount that can obtain optimal dynamic spring constants and damping characteristics.

[Means for solving problems]

In order to solve the above problems, this invention consists of a main body that receives vibration input from a vibration source, an elastic body connected to this main body, and a cavity hollowed out in the center of this elastic body. A first orifice that is arranged to face the wall surface, has a through hole in the center that opens to the inner wall surface, and has a first orifice that smoothly slopes and gradually becomes deeper at the periphery of the upper and lower surfaces, communicating the upper and lower surfaces. a fixing member; a second fixing member that is located in the through hole of the first fixing member, has an upper end closed, has a hole therein, and has a spiral groove bored in its circumferential surface; , disposed between the first fixing member and the second fixing member while covering the second fixing member, forming a second orifice in cooperation with the second fixing member, and having an upper surface closed. A hole having a large diameter portion at a predetermined angle is provided in the closed upper surface of the cylindrical shape, and is rotatable with respect to the second fixing member by external operation, and is capable of opening and closing the second orifice. and a movable member whose length when opened can be changed, and a protrusion provided on the circumferential surface of the movable member, which is rotatably attached to the second fixed member and located inside the hole of the movable member. The piece is located within the large diameter portion, and when the movable member rotates, the end of the large diameter portion comes into contact with the protruding piece and rotates together within a predetermined range with respect to the second fixed member. And during this rotation,
The valve member is biased by a biasing member such that the matching size of the hole provided therein and the hole of the second fixing member is changed and the holes do not match, and the lower surface of the first fixing member. a diaphragm provided in the first fixing member; a lid; a first chamber in which a liquid is sealed and formed above the first fixing member; and a second chamber formed below the first fixing member; Depending on the rotation state of the movable member due to external operation, communication between the first chamber and the second chamber is established through a first orifice that is in constant communication and a second orifice whose length is changed according to external operation. or through a first orifice in constant communication and a hole in the valve member whose size is changed to match the hole in the second fixing member. It is composed of

[Effect]

This invention consists of a main body that receives vibration input from a vibration source, an elastic body connected to the main body, and a hollow space hollowed out in the center of the elastic body. The first hole has a through hole that opens into the inner wall surface in the upper and lower parts, and has a first through hole that smoothly slopes at the peripheral edge of the upper and lower surfaces and gradually becomes deeper to communicate the upper and lower surfaces.
a first fixing member having an orifice; a first fixing member located in the through hole of the first fixing member; the upper end thereof is closed; a hole is provided therein; and a spiral groove is provided in the circumferential surface of the first fixing member; a second fixing member; and a second fixing member;
A cylindrical shape having a closed upper surface, disposed between the fixing member and the second fixing member, and provided with a groove and a through hole that cooperate with the second fixing member to form a second orifice, and the closed upper surface. a movable member having a hole therein and rotatable relative to the second fixed member by external operation so that the length of the second orifice can be changed; and a hole in the movable member. is located inside the movable member, is rotatable with respect to the second fixed member within a predetermined range by the movable member when the movable member rotates, and has a hole that matches the hole of the second fixed member. and a valve member whose opening degree is adjusted according to movement by the fixing member since the hole is biased so as not to coincide with the hole of the second fixing member, and a valve member provided on the lower surface of the first fixing member. The first chamber includes a diaphragm and a lid, and a liquid is sealed in a first chamber formed above the first fixing member and a second chamber formed below the first fixing member. and the second chamber are always communicated through the first orifice, and the second orifice whose length is changed according to the operation of the movable member, or the hole of the valve member whose opening degree is adjusted and the second chamber. Since the first chamber and the second chamber are communicated through the holes in the fixed member, the communication state between the first chamber and the second chamber can be changed depending on the input vibration, and the optimum damping state and dynamic spring constant can be obtained. Become.

〔Example〕

Embodiments of this invention shown in the drawings will be described below.

A liquid-filled mount according to this invention is shown in FIGS. 1 and 2, and the same parts as in the conventional one are given the same numbers and detailed explanations will be omitted.

A first fixing member 15 is provided facing the inner wall surface of a cavity hollowed out at the center of the elastic body 4, and this first fixing member 15
A through hole 15c is provided in the center of the solid member 15, and a groove 15a is provided in the upper and lower surfaces of the periphery, and the groove 15a has an occluded shape and gradually becomes deeper. The deepest part thereof communicates with a circumferentially long through hole 15b that passes through the first fixing member 15, and the groove 15a on the upper and lower surfaces and the through hole 15b form a first orifice 16 that has a spiral shape as a whole. .

Further, inside the through hole 15c of the first fixing member 15, a second fixing member 17 having a spiral groove 17a on the circumferential surface is located, and the second fixing member 17 is closed at the upper part. A hole 17b is provided in the center of the closed part through which the shaft of a valve member described later is inserted, and a fan-shaped hole 17c is provided in the closed upper part. The upper part and the inner part communicate with each other through this sector-shaped hole 17c.

As shown in FIG. 3, a toothed portion 18a is provided at the lower end between the first fixing member 15 and the second fixing member 17, and the upper surface has a cylindrical shape extending inward. The movable member 18 has the second
The extended portion 18 of the upper surface of the movable member 18 is positioned with the fixed member 17 in position.
b is located above the upper peripheral edge of the second fixing member 17.

This movable member 18 has a hole 18c in its upper surface formed by the extended portion 18b, and a portion of the hole 18c extends into the extended portion 18b, and a large diameter portion 18d.
It is becoming.

Further, this movable member 18 has a spiral groove 18e formed on the upper surface at a position corresponding to the spiral groove 17a formed in the second fixed member 17, and a through hole 18f at the deepest part. Therefore, the groove 18e and the through hole 18f provided in the movable member 18 communicate with the groove 17a provided in the second fixed member 17, so that the second orifice 30 is formed.

A valve member 19 shown in FIG. 4 is provided inside the hole 18c of the movable member 18. A sector-shaped hole 19a having the same size as the hole 17a of the second fixing member 17 is bored in the lower surface of the central part.
A shaft 19b is provided in communication with the inside of the second fixing member 17, and a sector-shaped hole 1 of the second fixing member 17 is provided on the lower surface.
The wall 20 located inside the movable member 18 is suspended, and the large diameter portion 18 of the movable member 18 is attached to the circumferential surface.
A protruding piece 21 located at d is provided, and the shaft 19
When the lower end of the movable member 18 is fixed with a bolt, it can be rotated by a predetermined angle inside the hole 18c of the movable member 18.

Further, a hole 15d is formed in the first fixed member 15 in the horizontal direction, and a shaft 23 of a gear 22 that meshes with the teeth 18a at the lower end of the movable member 18 rotates inside the hole 15d. possible.

Further, a lid 24 is provided on the lower surface of the first fixing member 15.
A diaphragm 25 is attached through the diaphragm 25 and a second chamber 27 is formed between the diaphragm 25 and the first fixing member 15 and the second fixing member 17, and a first chamber 26 is formed inside the elastic body 4. has been done.

The valve member 19 is biased counterclockwise in FIG. 1 by a biasing member (not shown).

Next, the operation of the above will be explained.

First, in the state shown in FIG. 1, the first orifice 16 provided in the first fixing member 15 always communicates between the first chamber 26 and the second chamber 27, and
The groove 18e and the through hole 18f formed in the movable member 18 are similar to the groove 1 formed in the second fixed member 17.
7a, the second orifice 30 also communicates between the first chamber 26 and the second chamber 27. Therefore, the first orifice 30 communicates with the first chamber 26 and the second orifice 27. and the second chamber 27 are communicated with each other.

Furthermore, when the shaft 23 located inside the hole 15d of the first fixed member 15 is rotated from the state shown in FIG. As the gear 22 rotates, the movable member 18 rotates around the second fixed member 17, and when the movable member 18 rotates clockwise within a range a, the end A of the large diameter portion 18d of the hole 18c When the projecting piece 21 of the valve member 19 comes into contact with the groove 18e and the through hole 18f of the movable member 18, communication with the groove 17a of the second fixed member 17 is blocked, and the second orifice 30 is closed. In this state, the first chamber 26 and the second chamber 27 are communicated only through the first orifice 16.

When the movable member 18 further rotates clockwise due to the rotation of the shaft 23, the end A of the large diameter portion 18d of the movable member 18 pushes the protrusion 21 of the valve member 19, causing the valve member 19 to They rotate together clockwise against the biasing force of the biasing member.

Then, a fan-shaped hole 1 is formed in the valve member 19.
9a, this fan-shaped hole 19
a begins to coincide with the fan-shaped hole 17c drilled in the second fixing member 17, and therefore the first orifice 16 and the hole 19a of the valve member 19
and the matching valve portion of the hole 17c of the second fixing member 17, thereby forming the first chamber 26 and the second chamber 27.
will be in communication with each other.

In this case, the fan-shaped hole 17c of the second fixing member 17 and the fan-shaped hole 19a of the valve member 19
The coincidence becomes larger as the movable member 18 is rotated by the shaft 23, and
When the protruding piece 21 of the valve member 19 rotates within a range b and comes into contact with the end B of the large diameter portion 18d of the movable member 18, the fan-shaped hole 19a of the valve member 19 and the second fixed member The fan-shaped holes 17c of 17 are completely aligned and the valve is opened to the maximum extent, so that the communication between the first chamber 26 and the second chamber 27 is maximized at this time. Therefore, the valve member 19
The matching portion of the hole 19a and the hole 17c of the second fixing member 17 can be seen as a third orifice.

Further, when the movable member 18 is rotated counterclockwise via the shaft 23, the valve member 19 is also biased against the movable member 18 because the valve member 19 is biased counterclockwise by the biasing member. The wall 20 hanging down from the lower surface of the valve member 19 connects with the fan-shaped hole 17c of the second fixing member 17.
When it comes into contact with the end of the valve member 19, the rotation of the valve member 19 stops in that state, and if the shaft 23 is further rotated and the movable member 18 is rotated, the state shown in FIG. 1 is restored.

Therefore, when the threaded portion 1 attached to the elastic body 4 is connected to a vibration source and the vibrations from this vibration source are input to the main body 2, the vibrations are received by the elastic body 4.

The input vibration from this vibration source is, for example,
In the case of low frequency vibrations of 10Hz or less, the movable member 18
is rotated so that the groove 18e and the through hole 18f match the groove 17a of the second fixing member 17, thereby changing the length of the second orifice 30 to an optimum state.

Therefore, the first chamber 26 and the second chamber 27 are communicated with each other by the second orifice 30 having an optimum length and the first orifice 16 having a predetermined length.

Also, if the input vibration of the vibration source is, for example, 10
Hz to 50Hz, if the movable member 18 is rotated to a position where the through hole 18f of the movable member 18 and the groove 17a of the second fixed member 17 do not communicate with each other, the first chamber 26 and The second chamber 27 is communicated with only the first orifice 16.

Furthermore, if the input vibration of the vibration source is e.g.
In the case of 50 Hz or more, the valve member 19 is rotated by the movable member 18 to open the fan-shaped hole 1.
9a and the fan-shaped hole 17c of the second fixing member 17.
If the first chamber 26 and the second chamber 27 are made to coincide, the first orifice 16 is in constant communication, and the holes 17c and 19a of the second fixing member 17 and the valve member 19 are aligned. It will communicate with the third orifice, and the size of the third orifice can be changed.

Therefore, depending on the input vibration, the first chamber 26
By setting the communication state between the second chamber 27 and the second chamber 27, it is possible to obtain an optimal damping characteristic and dynamic spring constant according to the input vibration.

In the above embodiment, the shaft 23 was manually rotated to adjust the opening degree of the second orifice 30 and the valve. The shaft 23 is
By configuring the engine to rotate, it is possible to achieve optimal damping characteristics and dynamic spring constants for internal combustion engine vibrations that vary depending on the rotational speed. By rotating the rotating member by external operation, communication between the first chamber and the second chamber can be established between the first orifice only and the first orifice and length adjustment. It is possible to select between a possible second orifice and a first orifice and an adjustable valve, and these selections can be made by rotating the rotating member with a single external operation. This can be done by simply letting the user know.

For this reason, the space required around the installation location is very small since only a single space for external operation is required, and furthermore, maintenance and adjustment are also very efficient. Therefore, it is possible to achieve optimal damping characteristics and dynamic spring constants depending on the input vibration frequency, and compared to conventional ones that use two diaphragms, it is possible to achieve a finer damping effect depending on the input vibration. Obtainable.

[Brief explanation of the drawing]

Fig. 1 is a schematic plan view of a liquid-filled mount according to this invention, Fig. 2 is a schematic sectional view of what is shown in Fig. 1, Fig. 3 is a schematic perspective view showing the movable member, and Fig. 4 is a schematic plan view of the liquid-filled mount according to this invention.
The figure is a schematic perspective view of a valve member, and FIG. 5 is a schematic sectional view showing a conventional valve member. DESCRIPTION OF SYMBOLS 1... Thread part, 2... Main body part, 3... Fixing member, 4... Elastic body, 5... Orifice plate,
5a, 7b, 15d, 17b, 18c...hole,
6, 26...First chamber, 7...Disc-shaped orifice body, 7a, 15a, 17a, 18e...Groove, 8...
...Auxiliary diaphragm, 9...Main diaphragm, 1
0,27...2nd chamber, 11...orifice, 15
...First fixing member, 15b, 15c, 18f...
Through hole, 16...first orifice, 17...second
Fixing member, 17c, 19a...Sector-shaped hole, 18
...Movable member, 18a...Tooth portion, 18b...Extending portion, 18d...Large diameter portion, 19...Valve member, 19b, 23...Shaft, 20...Wall, 21...
Projection piece, 22...gear, 24...lid, 25...diaphragm, 30...second orifice, A, B...
The end of the large diameter section.

Claims (1)

[Claims for Utility Model Registration] 1. A main body 2 that receives vibration input from a vibration source;
The elastic body 4 is connected to the main body 2, and the elastic body 4 has a through hole 15c in the center thereof, which is arranged opposite to the inner wall surface of the cavity hollowed out in the center. A first fixing member 15 has a first orifice 16 on the periphery of the upper and lower surfaces that smoothly slopes and gradually becomes deeper to communicate the upper and lower surfaces.
and a second fixing member located in the through hole 15c of the first fixing member 15, whose upper end is closed, a hole 17c is provided therein, and a spiral groove 17a is bored in the circumferential surface. A member 17, which is disposed between the first fixing member 15 and the second fixing member 17 while covering the second fixing member 17, cooperates with the second fixing member 17 to open a second orifice. 30, and the large diameter portion 18 is formed at a predetermined angle on the closed upper surface, forming a cylindrical shape with a closed upper surface.
A movable hole 18c is provided with a hole 18c, which can be rotated with respect to the second fixing member 17 by external operation, and can open and close the second orifice 30 and change the length when the second orifice 30 is opened. Member 18
and a projecting piece 21 that is rotatably attached to the second fixed member 17 and located inside the hole 18c of the movable member 18, and provided on the peripheral surface.
is located within the large diameter portion 18d, and the movable member 18
When the large diameter portion 18d is rotated, the end of the large diameter portion 18d touches the projecting piece 21.
The hole 19a provided therein and the hole 17c of the second fixing member 17 coincide with each other during this rotation. The valve member 19, which is biased by a biasing member such that the hole 19a does not match, the diaphragm 25 provided on the lower surface of the first fixing member 15, the lid 24, and the liquid and a first chamber 26 formed above the first fixed member 15 and a second chamber 27 formed below the first fixed member 15, and the movable member 18 can be operated externally. Depending on the rotation state, communication between the first chamber 26 and the second chamber 27 may be through the first orifice 16 that is in constant communication and the second orifice 30 whose length is changed, or , a first orifice 16 that is in constant communication, and a second
A liquid-filled mount characterized in that the mounting is performed through a hole 19a of a valve member 19 whose size is changed to match a hole 17c of a fixing member 17. (2) The hole 17c of the second fixing member 17 is fan-shaped, and the hole 17c of the valve member 19 is shaped like a fan.
2. The liquid-filled mount according to claim 1, wherein the mount 9a is also fan-shaped. (3) The movable member 18 has teeth 18a on its lower surface.
is provided, and a shaft 23 of a gear 22 that meshes and engages with this tooth portion 18a extends outside, and this shaft 23
2. The liquid-filled mount according to claim 1, wherein said movable member 18 is rotatable relative to said second fixed member 17 in response to rotation of said second fixed member 17.