JPH04117234U - Viscous fluid filled damper - Google Patents

Abstract

(57) [Summary] [Purpose] To enable a large axial stroke of the stirring shaft part in a damper filled with viscous fluid, and to
Good sealing performance when sealing a viscous fluid inside. [Structure] The opening side end of the peripheral wall part 16 of the damper 10 is extended in the axial direction of the stirring shaft part 20 in a direction farther away from the end of the opening into the viscous fluid 22 than the flange 24 on the outer peripheral part thereof, The opening and the lid 14 that closes it are moved away from the end of the stirring shaft 20 on the entry side.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This invention relates to a viscous fluid filled damper.

0002 [Problems to be solved by conventional techniques and ideas] When a CD player is installed in a vehicle, etc., the vibrations of the vehicle directly play the CD. If the sound is transmitted to the player, problems such as skipping may occur, so to prevent this, the CD player A damper filled with viscous fluid may be interposed between the tire and the support member on the vehicle body side. It is being said.

0003 FIG. 2(A) shows an example of such a damper. 10 in the figure 0 is a cylindrical thick peripheral wall portion of the damper 102, and the peripheral wall portion 100 is A viscous fluid 104 such as silicone oil is contained within the enclosed space. and A stirring shaft portion 106 is provided so as to plunge into this viscous fluid 104, Based on this relative displacement of the stirring shaft portion 106, viscous flow of the viscous fluid 104 occurs, and this This allows energy absorption, ie vibration damping.

0004 This stirring shaft portion 106 is connected to a thin flexible portion 108 at one end side of the peripheral wall portion 100. It is elastically supported in a more floating state, and the opening on the other end side of the peripheral wall portion 100 has a circular shape. It is closed with a flat lid 110.

[0005] An outward flange (attachment portion) 114 is provided on the outer periphery of the opening side end of the peripheral wall portion 100. This flange 114 and the outer periphery of the lid 110 are connected to a support member or a cover. It is designed to be held by a holding part 116 of the support member. Note that the stirring shaft portion 106 has a fitting for fitting the shaft of a supported member or a supporting member. An inlet 112 is formed.

[0006] By the way, with this type of damper, there are space limitations for the damper mounting part (Fig. from the open side surface of the lid body 110 (for convenience, the upper surface) to the stirring shaft portion 1 In some cases, it may not be possible to increase the height to one end of the stirring shaft 106. It is not possible to take a large stroke S, and large vibrations are applied to the damper 102. When the stirring shaft 106 undergoes a large relative displacement in the axial direction, the stirring shaft 106 There was a problem in that it hit the lid body 110 and it was difficult to obtain good attenuation.

[0007] On the other hand, as shown in FIG. 2(B), the shape of the lid body 118 is The part corresponding to the space surrounded by the part 100 (the part facing the opening) is made to protrude upward. It is conceivable to have a shape that is In this case, the stroke S of the stirring shaft section 106 can be increased by effectively utilizing the Y section space. It is possible to take.

[0008] However, when the damper is shaped like this, the cover body is It is difficult to seal the viscous fluid up to the inside 140, and it is difficult to seal the viscous fluid in the internal space of the damper. This makes it difficult to fill the internal space with viscous fluid, and the damper There is a problem that the damping performance of the On the other hand, in order to increase the filling ratio, the inside of the lid body 140 If the viscous fluid overflows from the opening in the peripheral wall 100, is the combination of the container body 111 including the peripheral wall portion 100 and the flange 114 and the lid body 118 This causes problems such as adhesion to the surface and obstructing the adhesion between the main body and the lid body 110. .

[0009]

[Means to solve the problem]

The damper of this invention was devised to solve these problems. The gist is (a) a cylindrical peripheral wall, and (b) a viscous membrane housed in a space surrounded by the peripheral wall. (c) connecting one end side of the peripheral wall to the stirring shaft; (d) a thin flexible part that elastically supports the stirring shaft part in a floating state; and (d) the other end side of the peripheral wall part. It has a lid body that closes the opening, and is supported at a mounting part provided on the outer periphery of the peripheral wall part. In a viscous fluid-filled damper fixed to a supporting member or a supported member, the peripheral wall portion The opening side end of the stirring shaft is located further forward of the stirring shaft than the mounting part in the axial direction of the stirring shaft. The opening and the lid body extend away from the end on the side of entry into the viscous fluid. The part facing the opening is located farther from the insertion end than the mounting part. It is because of the fact that

0010 [Effects of actions and ideas] In this way, in the present invention, the opening side end of the peripheral wall is extended to form the opening and the lid. The part of the body facing the opening is closer to the stirring shaft than the attachment part provided on the outer periphery of the peripheral wall. Because it is located far from the plunge end, the axial stroke of the stirring shaft can be increased. This effectively prevents the stirring shaft from hitting the lid and provides good damping. effect can be obtained.

[0011] When assembling this damper, the opening of the peripheral wall is oriented upward. When the viscous fluid is injected into the interior, the damper shown in Figure 2(B) Since the opening is located at a higher position in the viscous fluid storage space compared to the Not only is it easy to seal in the fluid, but it also prevents such viscous fluid from overflowing from the peripheral wall opening. The combination of the viscous fluid body and lid body can prevent low and therefore overflow. It is possible to prevent adhesion to surfaces and improve adhesion reliability.

0012 The outer periphery of the lid body should be in close contact with the mounting part of the outer periphery on the peripheral wall of the damper body. It may be bonded there, or it may be bonded to the main body at another location.

[0013]

【Example】

Next, embodiments of the present invention will be described in detail based on the drawings. In Fig. 1, 10 is a viscous fluid-filled damper made of rubber, resin, etc. , consists of a main body 12 and a lid body 14.

[0014] The main body 12 includes a thick cylindrical peripheral wall 16 and a wall at one end of the peripheral wall 16. It has a stirring shaft part 20 which is elastically supported in a floating state by a thin flexible part 18. Ru. A fitting hole 23 is formed in the stirring shaft portion 20, and a support member or the like is inserted into this fitting hole 23. or the shaft body of the supported member is inserted so that it is coupled to the supporting member or the supported member. The sea urchin is turning.

[0015] The stirring shaft portion 20 is plunged into the viscous fluid 22 housed inside the main body 12. The viscous flow of the viscous fluid 22 based on the relative displacement of the stirring shaft portion 20 generates energy. lugy absorption takes place.

[0016] An outwardly facing thick-walled flange 24 is provided on the outer periphery of the peripheral wall portion 16. The end of the peripheral wall 16 on the opening side extends upward in the figure from the flange 24. and its opening is located above the top surface of the flange 24 in the figure. Ru.

[0017] The opening side end surface of the peripheral wall portion 16 is a tapered surface 25, and the lid body 14 is attached to this tapered surface. The upper surface 25 and the upper surface of the flange 24 are fitted in close contact to close the opening. Ru.

[0018] The lid body 14 has a portion facing the opening of the peripheral wall portion 16 formed into a flat plate shape, and a portion facing the opening of the peripheral wall portion 16. The portion corresponding to the tapered surface 25 is a tapered portion 26, and the outer peripheral portion thereof is a tapered portion 26. It is a flat plate-shaped held part 28.

[0019] The lid body 14 is adhesively fixed to the flange 24 of the peripheral wall portion 16 at this held portion 28. The flange 24 and the supported part 28 are connected to the supported member or the supported part 28. It is designed to be held and fixed by a holding part 30 of the member.

[0020] In the damper 10 of this example, by effectively utilizing the space Y, the main body Comparing the position of the opening on the 12 side and the part facing the opening of the lid body 14 with the damper in Fig. 2(A) It is located at a high position (in the figure), which allows the dimensions of the The internal volume of the viscous fluid storage space can be increased without increasing the size. In addition, it is possible to increase the stroke S in the axial direction (vertical direction in the figure) of the stirring shaft portion 20. can. Therefore, even if large vibrations are applied to the damper 10, the stirring shaft 20 can be prevented from hitting the lid 14.

[0021] Furthermore, since the opening in the main body 12 is located at the top of the viscous fluid enclosed space, The viscous fluid 22 is injected into the main body 12 with this opening facing upward, and the lid body 14 is closed. When this is sealed, the internal viscous fluid 22 overflows from the opening and the flange 24 and the held part 28 can be effectively prevented from adhering to the adhesive surface, and the adhesion reliability can also be improved. go up

[0022] Further, in this example, the opening and the lid body 14 are positioned upward in the figure, and the stirring shaft portion 20 is stroked. Although the arc S can be made large, the flange 24 on the outer peripheral side of the peripheral wall portion 16 and the lid body 1 4, the position of the held part 28, that is, the part that is held and restrained by the supporting member or the supported member can be placed in the same position as the conventional damper in Fig. 2(A), so that the stirring shaft 20 can When the stirring shaft portion 20 and the peripheral wall portion 16 are relatively displaced in the direction, the internal viscous fluid 22 can be sufficiently sandwiched to allow it to flow effectively. This will cause The damping effect in the damper 10 can be enhanced.

[0023] Although the embodiments of the present invention have been described in detail above, this is merely an example, and the present invention is not limited to that. It can be configured in various forms without departing from the spirit of the invention.

[Brief explanation of drawings]

FIG. 1 is a sectional view of a viscous fluid-filled damper that is an embodiment of the present invention.

FIG. 2 is a sectional view of a damper shown to explain the background of the present invention.

[Explanation of symbols]

10 Viscous fluid filled damper 14 Lid body 16 Peripheral wall part 18 Flexible part 20 Stirring shaft part

Claims (1)

[Scope of utility model registration request] Claim 1: (a) a cylindrical peripheral wall; (b) a stirring shaft that protrudes into a viscous fluid contained in a space surrounded by the peripheral wall; and (c) one end of the peripheral wall. (d) a thin flexible part that connects the side and the stirring shaft and elastically supports the stirring shaft in a floating state;
A viscous fluid-filled damper having a lid for closing an opening on the other end side of the peripheral wall and fixed to a supporting member or a supported member at a mounting portion provided on an outer periphery of the peripheral wall, wherein the peripheral wall The opening side end of the part is extended in the axial direction of the stirring shaft part from the attachment part to the side away from the end of the stirring shaft part on the plunge side into the viscous fluid, and A viscous fluid-filled damper characterized in that a portion facing the opening is located farther from the plunger end than the mounting portion.