JP2006170271A - Liquid sealing type mount and its manufacturing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a liquid sealing type mount capable of improving sealing property for hydraulic fluid and mutual fitting force of strength members and improving reliability for a product. <P>SOLUTION: This liquid sealing type mount has a mount main body 2 for sealing hydraulic fluid 13 into the inside of the mount and a bracket 31 made of a steel plate to hold the mount main body 2. The mount main body 2 has a vulcanized molded part 3 for connecting a center boss 5 with an metallic outer case 4 through a rubber-like elastic body 6, a flexible member 7 arranged in opposition to the rubber-like elastic body 6, and a partitioning member 9 with an orifice 12 for partitioning an airtight space 8 between the rubber-like elastic body 6 and the flexible member 7 into two chambers 10, 11. The outer case 4 has a caulking part 4d for caulking and fixing each outer peripheral fringe part of the partitioning member 9 and the flexible member 7 between a main body part 4a and it. The bracket 31 has a fitting part 32b fitted into an outer peripheral side of the outer case 4 directly. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a mounting apparatus according to a vibration isolation technique, and more particularly, to a liquid-sealed mounting apparatus and a manufacturing method thereof. The mount device of the present invention is interposed between an automobile body and an engine, for example, and is used to provide vibration-proof support to the engine side so that vibration generated on the engine side is not transmitted to the body side as it is.

  Conventionally, a liquid-sealed mount 51 shown in FIG. 5 is known. The liquid-sealed mount 51 includes a mount body 52 in which a working liquid 53 is sealed inside a mount, and a bracket 54 that holds the mount body 52. (See Patent Document 1). The mount main body 52 includes a vulcanized molded product 55 in which a center boss 58 is connected to a sleeve 56 via a rubber-like elastic body 57, a flexible member 59 disposed so as to face the rubber-like elastic body 57, and a rubber-like elastic body 57. And a partition member 62 with an orifice 63 that partitions the airtight space between the flexible members 59 into two chambers 60 and 61, and a case 65 is fitted on the outer peripheral side of the sleeve 56 via a seal rubber 64. The case 65 holds the partition member 62 and the flexible member 59 therein.

  However, in the above prior art, mount components such as the case 65 and the vulcanized molded product 55 are fixed by being fitted to the bracket 54 during the production. In addition, since the hydraulic fluid 53 is sealed at the same time as the fitting step, this step has a great influence on the vibration-proof characteristics of the liquid-filled mount.

  Therefore, in the above-described prior art, the characteristic defect of the mount main body 52 becomes apparent after the fitting process using a large number of components, and the defective product includes the expensive bracket 54, resulting in a high loss. Further, the operation of enclosing the hydraulic fluid 53 and the fitting process using the large bracket 54 require complicated and large equipment, and this process requires high processing costs. The bracket 54 is generally expensive because it is formed of a high-strength, high-tensile steel plate or the like.

  Further, a case 65 is fitted to the outer peripheral side of the sleeve 56 forming a part of the vulcanized molded product 55 via a rubber seal 64, and the mount internal constituent members such as the partition member 62 and the flexible member 59 are held by the case 65. Since the vulcanized molded product 55 and these internal components are not directly coupled to each other, there is a problem of poor reliability with respect to the sealing performance against the working fluid 53 sealed in the mount.

  Further, the configuration in which the rubber seal 64 and the case 65 are interposed between the sleeve 56, which is a strength member, and the bracket 54 has a low fitting force, so that it is reliable in terms of long-term durability of the fitting structure. There are poor problems.

Japanese Patent No. 3362575

  The present invention has been made in view of the above points, and an object thereof is to provide a liquid-sealed mount that can improve the sealing performance against hydraulic fluid and the fitting force between strength members, thereby improving the reliability of the product. And

  In addition, an object of the present invention is to provide a method for manufacturing a liquid-sealed mount that can perform a quality inspection of the mount body without including an expensive bracket and is advantageous in terms of manufacturing cost.

  In order to achieve the above object, a liquid-filled mount according to claim 1 of the present invention includes a mount body in which a working fluid is sealed in a mount, and a bracket for holding the mount body. A vulcanized molded product in which a center boss is connected to the case via a rubber-like elastic body, a flexible member disposed opposite to the rubber-like elastic body, and an airtight space between the rubber-like elastic body and the flexible member In the liquid-filled mount having a partition member with an orifice for partitioning into a chamber, the outer case has a crimping portion for crimping and fixing each outer peripheral edge portion of the partition member and the flexible member between the outer case and the main body portion. The bracket has a fitting portion that is directly fitted to the outer peripheral side of the outer case.

  A method for manufacturing a liquid-sealed mount according to claim 2 of the present invention is a method for manufacturing the liquid-sealed mount according to claim 1 described above. Characterized in that it has a step of assembling the mount body by overlapping the flexible members and caulking the caulking portion of the outer case, and then a step of fitting the bracket to the mount body assembled in the above step. It is.

  In the liquid-sealed mount according to the first aspect of the present invention having the above-described configuration, the outer case forming a part of the vulcanized molded product is between the main body and the outer peripheral edge portions of the partition member and the flexible member. Therefore, the outer race, the partition member, and the flexible member can be directly coupled to each other, that is, the vulcanized molded product and the inner portion are formed by caulking the caulking portion. It becomes possible to couple | bond with a structural member directly.

  In addition, since the bracket is directly fitted on the outer peripheral side of the outer case, which is a strength member corresponding to the sleeve in the above-described prior art, it is possible to increase the fitting force between the strength members.

  In the manufacturing method according to claim 2 of the present invention having the above steps, the mounting is performed by caulking the caulking portion of the outer case by superimposing the partition member and the flexible member on the vulcanized molded product in the hydraulic fluid. Since the first step of assembling the main body is performed, and then the second step of fitting the bracket to the mount main body assembled in the first step is performed, after the end of the first step, before the start of the second step In addition, it is possible to perform a quality inspection of the mount body without including an expensive bracket.

  The present invention has the following effects.

  That is, in the liquid-filled mount according to claim 1 of the present invention, the outer case forming a part of the vulcanized product is caulking and fixing the outer peripheral edge portions of the partition member and the flexible member between the main body portion and the outer case. Therefore, the outer race, the partition member, and the flexible member, that is, the vulcanized molded product and the internal component member can be directly coupled by caulking the caulking portion. ing. Therefore, it is possible to improve the sealing performance with respect to the working fluid sealed in the mount, and thus the reliability of the sealing performance can be improved.

  Further, since the bracket is directly fitted on the outer peripheral side of the outer case, which is a strength member, it is possible to increase the fitting force between the strength members. Therefore, it is possible to effectively prevent the outer case, i.e., the mount body, from dropping from the bracket, thereby improving the reliability of the fitting structure.

  Further, in the manufacturing method according to claim 2 of the present invention, it is possible to carry out a quality inspection of the mount body without including an expensive bracket before the start of the second step after the end of the first step. Therefore, even if a defective product occurs as a result of the inspection, the defective product is only the mount body, and the defective product does not include the bracket. Therefore, an expensive bracket can be used effectively, and the manufacturing cost of the mount product can be reduced.

  The present invention includes the following embodiments.

(1) In liquid-filled mounts used for engine mounts, etc.
(1-1) having a bracket that is a strength member in which a stopper and a fastening member to an automobile body are integrated;
(1-2) The outer case bonded to the main body rubber incorporates each constituent member together with the inner sealing liquid, and caulking is fastened at the opening end of the outer case to constitute the basic structure portion (semi-finished product) of the liquid-filled mount.
(1-3) The bracket and the semi-finished product of (1-2) are fitted and joined without an elastic body.
Liquid-filled mount consisting of the above components.

(2) With the above configuration, the outer metal ring (outer case) of the main rubber is extended downward, and the outer case opening is opened with each component other than the bracket constituting the liquid-sealed mount and the inner liquid contained in the outer case. Clamp the edges and fix. Since the basic structure of the liquid-filled mount is completed by this caulking process, it is possible to inspect the anti-vibration characteristics and to minimize the cost loss when defective products occur. Further, since the bracket and the outer case are directly fitted, the strength of the fitting portion is increased and the reliability is high. Therefore, the following effects can be obtained.

(2-1) The basic structure of the liquid-filled mount is completed in a semi-finished product state without a bracket, and the loss cost associated with the defect is low (lower cost).
(2-2) The basic structure (semi-finished product state) of the liquid-filled mount using caulking fastening reliably covers the constituent members in the radial direction and the axial direction, and has high airtightness.
(2-3) The coupling between the bracket and the semi-finished product is a strong coupling between the strength members because the outer case adhesively bonded to the main rubber is directly fitted, and the reliability is high.

  Next, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 shows a cross section of a liquid-filled mount 1 according to an embodiment of the present invention. 2 shows a mount body 2 that is one component of the liquid-filled mount 1, and FIG. 3 shows a bracket 31 that is the other component. FIG. 4 is an explanatory diagram of a caulking process in the mount body 2.

  The mount body 2 shown in FIG. 2 is configured as follows.

  That is, first, an annular metal outer case (case) 4 forming one attachment portion of the mount body 2 and a metal center boss (boss) 5 also forming the other attachment portion are annular rubber elastic bodies ( The three vulcanized molded products 3 are formed by being connected via a main body rubber 6, and a diaphragm 7 made of a rubber-like elastic body, which is a flexible member, is disposed below the outer case 4. In addition, an airtight space 8 is provided inside the mount body 2 so as to be surrounded by these elements, and the airtight space 8 is formed by a partition member 9 disposed between the outer case 4 and the diaphragm 7. The first liquid chamber (main liquid chamber) 10 on the side and the second liquid chamber (sub liquid chamber) 11 on the diaphragm 7 side are partitioned, and an orifice channel 12 is provided to communicate both chambers 10, 11. Chamber 10, 11 Hydraulic fluid, such as viscous fluid (the encapsulating liquid) 13 is sealed. On the outer side (lower side) of the diaphragm 7, a cup-shaped metal lid member 14 provided with a vent hole 14a is disposed.

  The outer case 4 has a cylindrical portion 4b, and a conical inclined surface portion 4c is integrally formed from one end (upper end) of the cylindrical portion 4b inward in the radial direction. A body portion 4a of the outer case 4 is formed by the portion 4b and the slope portion 4c. The other end (lower end) of the cylindrical portion 4b extends downward in the figure, and an annular crimping portion 4d that sandwiches the outer peripheral edge portions of the partition member 9, the diaphragm 7 and the lid member 14 with the main body portion 4a. Is integrally molded.

  The center boss 5 has an upper surface step portion 5a and a lower surface slope portion 5b on its outer periphery, and a rubber stopper (rebound stopper) 16 integrated with the rubber-like elastic body 6 is provided on the upper surface step portion 5a. A mounting bolt 17 is screwed into the center position of the center boss 5.

  The rubber-like elastic body 6 is vulcanized and bonded to the slope 4c of the outer case 4 and the bottom slope 5b of the center boss 5, respectively.

  An elastic body 18 that is integral with the rubber-like elastic body 6 is also filled in the inside of the main body portion 4a of the outer case 4, that is, between the cylindrical portion 4b and the inclined surface portion 4c. Part of is formed. The slope 4c of the outer case 4 is provided with a notch-shaped opening 4e for communicating one end of the orifice channel 12 with the first liquid chamber 10 on a part of the circumference.

  The partition member 9 has a disk-shaped metal plate 19. A hole 19 a is provided in the center of the plane of the plate 19, and a sub-diaphragm 20 for high-frequency vibration attenuation is installed so as to close the hole 19 a. Has been.

  The diaphragm 7 constituting the flexible member has a metal diaphragm mounting ring 21 on the outer periphery thereof. The diaphragm mounting ring 21 has a U-shaped cross section, and a part of the orifice channel 12 is formed in the diaphragm mounting ring 21. Is formed. Further, the diaphragm mounting ring 21 is provided with a notch-shaped opening 21 a for communicating the end of the orifice channel 12 with the second liquid chamber 11 in a part of the circumference.

  A part of the orifice flow path 12 formed by the elastic body 18 and a part of the orifice flow path 12 formed by the diaphragm attachment ring 21 are connected to a communication hole (this communication hole is also provided). They are communicated with each other by a part of the orifice channel 12 (not shown).

  A film-like seal rubber 22 integral with the elastic body 18 is attached to the inner peripheral surface of the crimped portion 4d of the outer case 4, and after the crimp rubber 22 is crimped, the crimped portion is brought into close contact with the lid member 14. 4d sealability is ensured.

  The mount body 2 having the above configuration connects the outer case 4 which is one mounting portion to the automobile body (supporting body) side and connects the center boss 5 which is the other mounting portion to the engine (supported body) side. If the vibration in the direction A in the figure is input from the engine side after the input of the initial load such as the engine weight, the center boss 5 is displaced in the same direction, and the first liquid chamber The volume of the fluid 10 is reduced, and the working fluid 13 flows from the first fluid chamber 10 to the second fluid chamber 11 via the orifice channel 12, and at this time, exhibits a damping action against the input vibration. Conversely, when vibration in the direction B in the figure is input, the center boss 5 is displaced in the same direction, the volume of the first liquid chamber 10 is expanded, and the working liquid 13 passes through the orifice channel 12 from the second liquid chamber 11. To the first liquid chamber 10 and exhibits a damping action against the input vibration. Further, when high frequency vibration is input, the sub diaphragm 20 is resonated to attenuate it.

  The bracket 31 of FIG. 3 is configured as follows.

  That is, first, a bracket main body 32 having a substantially cylindrical shape is provided, and a cylinder fitted and fixed to one end (lower end) of the cylindrical portion 32a of the bracket main body 32 on the outer peripheral side of the outer case 4 in the mount main body 2. A shaped fitting portion 32b is integrally formed. An annular stepped portion 32c is provided at substantially the center in the axial direction of the cylindrical portion 32a. One end of the stepped portion 32c is a large diameter portion, the other end is a small diameter portion, and the large diameter portion is a fitting portion 32b. Yes. The end portion of the outer case 4 is abutted against the stepped portion 32c, and positioning in the axial direction is performed. The fitting portion 32b is fitted on the outer peripheral side of the main body portion 4a of the outer case 4, and is kept axially straight in shape.

  The other end (upper end) of the cylindrical portion 32a of the bracket body 32 is an inward flange-like shape that faces the rubber stopper 16 in the mount body 2 in the axial direction and limits the relative displacement amount of the center boss 5 with respect to the outer case 4. The stopper portion 32d is integrally formed. The stopper portion 32d is combined with the rubber stopper 16 provided on the upper surface step portion 5a of the center boss 5 to operate against the vibration input in the B direction. Further, for vibration input in the A direction, an engine-side component (not shown) connected above the center boss 5 is against a rubber stopper (bound stopper) 33 installed on the upper surface of the stopper portion 32d. The stopper is operated by contacting from above.

  A plurality of connecting members 34 for connecting the bracket 31 to the automobile body side are fixed to the outer peripheral side of the bracket body 32. Each of the connecting members 34 integrally includes a fixing portion 34a fixed to the outer peripheral side of the bracket body 32 by means such as welding and a flange portion 34b connected to the fixing portion 34a, and is attached to the flange portion 34b. Bolt holes 34c are provided for inserting bolts (not shown).

  The bracket 31 is formed of a high-strength high-tensile steel plate for both the bracket body 32 and the connecting member 33.

  Further, the bracket 31 functions to hold the mount body 2 as described above and to connect the outer case 4 which is one attachment portion thereof to the vehicle body side.

  Next, the main points of the manufacturing method of the liquid-filled mount 1 will be described. After the manufacture of the mount body 2 is completed, the bracket 31 is fitted on the outer periphery thereof.

  That is, as shown in FIG. 4, the partition member 9, the diaphragm 7, and the lid member 14 are sequentially stacked on the vulcanized molded product 3 including the outer case 4, the center boss 5, and the rubber-like elastic body 6. The caulking portion 4d is caulked (arrow C), and this caulking process is performed in a tank (not shown) filled with the hydraulic fluid 13, thereby simultaneously performing the caulking process and the hydraulic fluid 13 sealing process. Then, the manufacture of the mount body 2 is completed, and then the bracket 31 is fitted to the mount body 2 that has been manufactured in the above-described process. Therefore, according to this process order, it is possible to carry out a quality inspection of the mount body 2 at the stage after the manufacturing process of the mount body 2 is completed and before the bracket 31 is fitted.

  The liquid-filled mount 1 is characterized in that it exhibits the following operational effects by the above configuration.

  That is, first, the outer case 4 forming a part of the vulcanized molded product 3 has a caulking portion 4d for caulking and fixing the outer peripheral edge portions of the partition member 9, the diaphragm 7 and the lid member 14 between the main body portion 4a. Therefore, the outer race 4 and the partition member 9, the diaphragm 7 and the lid member 14, that is, the vulcanized molded product 3 and the internal component member can be directly coupled by caulking the caulking portion 4 d. It is said that. The caulking portion 4d and the lid member 14 are sufficiently sealed by the seal rubber 22 attached to the inner surface of the caulking portion 14. Therefore, the sealing performance with respect to the working fluid 13 enclosed in the mount can be improved, and thus the reliability of the sealing performance can be improved.

  Further, since the bracket 31 is directly fitted on the outer peripheral side of the outer case 4, it is possible to increase the fitting force between the strength members. Therefore, it is possible to effectively prevent the outer case 4, that is, the mount main body 2 from dropping from the bracket 31, and thus the reliability of the fitting structure can be improved.

  Further, in the above manufacturing method, the quality inspection of the mount body 2 is performed without including the expensive bracket 31 at the stage after the manufacturing process of the mount body 2 and before the fitting process of the bracket 31 is performed. Therefore, even if a defective product occurs as a result of inspection, the bracket 31 is not included in the defective product. Therefore, the expensive bracket 31 can be effectively used, and the manufacturing cost of the mount product can be reduced.

Sectional view of a liquid filled mount according to an embodiment of the present invention Sectional view of the liquid-sealed mount body in the mount Sectional view of the bracket in the same mount Explanatory drawing of caulking process in the same mount Sectional view of a liquid-filled mount according to a conventional example

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Liquid enclosure type mount 2 Liquid enclosure type mount body 3 Vulcanized molding 4 Outer case 4a Body part 4b, 32a Cylindrical part 4c Slope part 4d Caulking part 4e, 21a Opening part 5 Center boss 5a Upper surface step part 5b Lower surface slope part 6,18 Rubber elastic body 7 Diaphragm (flexible member)
8 Airtight space 9 Partition member 10 First liquid chamber 11 Second liquid chamber 12 Orifice flow path 13 Hydraulic fluid 14 Lid member 14a Vent hole 16, 33 Rubber stopper 17 Mounting bolt 19 Plate 19a Hole 20 Sub-diaphragm 21 Diaphragm mounting ring 22 Seal rubber 31 bracket 32 bracket body 32b fitting portion 32c stepped portion 32d stopper portion 34 connecting member 34a fixing portion 34b flange portion 34c bolt hole

Claims (2)

A mount body (2) enclosing a working fluid (13) inside the mount, and a bracket (31) for holding the mount body (2);
The mount body (2) includes a vulcanized molded product (3) in which a center boss (5) is connected to an outer case (4) via a rubber-like elastic body (6), and the rubber-like elastic body (6). A flexible member (7) arranged oppositely and an orifice (12) for partitioning an airtight space (8) between the rubber-like elastic body (6) and the flexible member (7) into two chambers (10) (11) In a liquid-filled mount (1) having a partition member (9) of
The outer case (4) has a caulking portion (4d) for caulking and fixing each outer peripheral edge portion of the partition member (9) and the flexible member (7) between the main body portion (4a) and the outer case (4).
The bracket (31) has a fitting portion (32b) that is directly fitted to the outer peripheral side of the outer case (4). A method of manufacturing the liquid-filled mount of claim 1, comprising:
By mounting the partition member (9) and the flexible member (7) on the vulcanized molded product (3) in the hydraulic fluid and crimping the crimped portion (4d) of the outer case (4), the mount body (2 )
And a step of fitting the bracket (31) to the mount body (2) assembled in the above step.

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