Liquid seal mount manufacturing method

Abstract

To provide a liquid seal mount manufacturing method with which a liquid seal mount can be more easily obtained.SOLUTION: A liquid seal mount manufacturing method for manufacturing a liquid seal mount, includes: a vulcanization step for obtaining a liquidless mount 1 by a vulcanization forming; and a work liquid injection step for injecting a work liquid L into the liquidless mount. The liquidless mount includes: an outer cylindrical member 2; an inner member 3; body rubber 4 for connecting the outer cylindrical member and the inner member to each other; a diaphragm 5; and a partitioning member 6 positioned between the body rubber and the diaphragm. A surface of the partitioning member of the liquidless mount includes: a bonded part 61 for a diaphragm which is bonded to an entire periphery of the diaphragm; a non-bonded part 62 for a diaphragm positioned on an inner periphery side of the bonded part for a diaphragm and is not bonded to but in contact with the diaphragm; and a non-bonded part 63 for body rubber which is not bonded to but in contact with the body rubber.SELECTED DRAWING: Figure 4

Description

[Technical field]

[0001] The present invention relates to a method for manufacturing a hydromount. [Background technology]

[0002] Conventionally, there has been a method of manufacturing a hydromount by first manufacturing a number of combined components, each of which is made by vulcanization-bonding rubber and metal fittings, and then assembling and crimping these combined components together in a non-compressible fluid (for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2004-169750 A Summary of the Invention [Problem to be solved by the invention]

[0004] However, conventional methods for manufacturing hydromounts are complicated and leave room for simplification.

[0005] An object of the present invention is to provide a method for manufacturing a hydrolic mount that enables a hydrolic mount to be obtained more easily. [Means for solving the problem]

[0006] [1] A method for manufacturing a hydrostatic mount, comprising the steps of: a vulcanization step for obtaining a liquid-free mount by vulcanization molding; a hydraulic fluid injection step of injecting hydraulic fluid into the hydraulic mount; Including, The liquid-free mount is An outer cylinder member; An inner member; a main body rubber that connects the outer tube member and the inner member together; A diaphragm; a partition member located between the main rubber and the diaphragm; Equipped with The surface of the partition member of the liquid-free mount is a diaphragm joint portion joined to the diaphragm over an entire periphery; a non-jointed portion with respect to the diaphragm, the non-jointed portion being located on an inner peripheral side of the diaphragm-jointed portion and being in contact with the diaphragm but not joined thereto; a non-bonded portion to the main body rubber that is not bonded to but is in contact with the main body rubber; It has A liquid-sealed mount manufacturing method in which, in the hydraulic fluid injection process, a secondary liquid chamber is formed by the hydraulic fluid entering a first gap between the diaphragm-to-diaphragm non-jointed portion of the partition member and the diaphragm, and a main liquid chamber is formed by the hydraulic fluid entering a second gap between the main body rubber non-jointed portion of the partition member and the main body rubber, thereby obtaining the liquid-sealed mount.

[0007] [2] A method for manufacturing a liquid-sealed mount described in [1], wherein the partition member of the liquid-free mount has an orifice that connects the first gap and the second gap.

[0008] [3] The liquid-free mount further includes an injection tube formed integrally with the diaphragm; In the liquid-free mount, a central hole of the injection tube communicates with the first gap and the orifice; The method for manufacturing a hydrostatic mount according to [2], wherein in the hydraulic fluid injection step, the hydraulic fluid is injected from the injection tube.

[0009] [4] The liquid-free mount further includes a clip portion for fastening the injection tube; The method for manufacturing a hydrostatic mount according to [3], further comprising, after the hydraulic fluid injection step, an injection tube fastening step of sealing the central hole of the injection tube by fastening the injection tube to the clip portion.

[0010] [5] The method for manufacturing a liquid mount described in [4], wherein in the injection tube fastening process, the diaphragm is pulled by the injection tube, thereby widening the communication portion between the first gap and the orifice. Effect of the Invention

[0011] According to the present invention, a method for manufacturing a hydrolic mount can be provided that enables a hydrolic mount to be obtained more easily. [Brief description of the drawings]

[0012] [Figure 1] 4 is a diagram for explaining a mount skeleton creating step in a hydromount manufacturing method according to one embodiment of the present invention. [Diagram 2] FIG. 1 is a diagram for explaining the vulcanization process in a method for manufacturing a hydromount according to one embodiment of the present invention, and is an axial cross-sectional view that generally shows the state immediately before unvulcanized rubber is injected into a vulcanization molding mold. [Diagram 3] FIG. 3 shows a schematic axial cross-section of a liquid-free mount obtained by the vulcanization process of FIG. 2; [Figure 4] 1 is an axial cross-sectional view that shows, in outline, the hydromount obtained after the hydraulic fluid injection step and the injection tube fastening step in a hydromount manufacturing method according to one embodiment of the present invention; FIG. [Diagram 5] 5 is a view taken in the direction of arrow A in FIG. 4, showing the hydromount in FIG. 4 in a schematic manner. [Figure 6] 5 is a diagram for explaining an example of operation when the hydromount of FIG. 4 is used. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0013] The hydrostatic mount obtained by the hydrostatic mount manufacturing method of the present invention is suitable for use, for example, in a vehicle vibration isolation device, and is particularly suitable for use in a vibration isolation device for low-cost vehicles such as ultra-compact mobility vehicles. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of a method for manufacturing a hydromount according to the present invention will be described with reference to the drawings.

[0014] 1 to 5 are diagrams for explaining a method for manufacturing a hydrophilic mount according to one embodiment of the present invention. The method for manufacturing a hydrophilic mount according to this embodiment is used to manufacture a hydrophilic mount 1 as shown in, for example, Figs. 4 and 6. Fig. 6 shows an example of the state when the hydrophilic mount 1 of Fig. 4 is in use. The hydrophilic mount 1 of the example of Figs. 4 and 6 is configured to be used in a vehicle vibration isolation device (specifically, an engine mount) and is configured as a so-called hanging type, as described later. However, the hydromount 1 in each example described in this specification is not limited to the suspension type, and may be configured as a so-called compression type, for example. Also, the axial direction of the hydromount 1 may be oriented in any direction.

[0015] The method for manufacturing a hydromount in this embodiment mainly includes a mount skeleton creating step, a vulcanization step, and a hydraulic fluid injection step. In the mount skeleton creating process (FIG. 1), a mount skeleton 1'' (FIG. 2) is created. The mount skeleton 1'' is configured to be set in a vulcanization molding die M used in the subsequent vulcanization process (FIG. 2). The mount skeleton 1'' is composed only of a plurality of members, each of which is made of a material other than rubber (e.g., resin and / or metal). More specifically, in this embodiment, the mount skeleton 1'' includes an outer tube member 2, an inner member 3, and a partition member 6, each of which is made of a material other than rubber (e.g., resin and / or metal). In the vulcanization process (Fig. 2), with the mount skeleton 1'' set in the vulcanization molding die M, unvulcanized rubber is injected into the vulcanization molding die M to perform vulcanization molding, thereby obtaining a liquid-free mount 1' (Fig. 3). In the vulcanization process, a main rubber body 4 and a diaphragm 5, each of which is made of rubber, are formed. That is, the liquid-free mount 1' further comprises the main rubber body 4 and the diaphragm 5 in addition to the outer tube member 2, inner member 3, and partition member 6 that constitute the mount skeleton 1''. Unless otherwise specified, the liquid-free mount 1' has the same configuration as the mount skeleton 1''. In the hydraulic fluid injection step (FIG. 4), hydraulic fluid L is injected into the liquid-free mount 1', thereby obtaining the hydrolic mount 1 (FIG. 4). The hydrolic mount 1 has a structure in which the hydraulic fluid L is sealed in the liquid-free mount 1'. Therefore, unless otherwise specified, the hydrolic mount 1 has the same structure as the liquid-free mount 1'.

[0016] The hydraulic fluid L is made of, for example, ethylene glycol, silicone oil, or the like.

[0017] In this specification, the liquid-free mount 1' and the liquid-filled mount 1 may be simply referred to as "mount (1', 1)". Furthermore, in this specification, when describing mounts 1', 1, for convenience, unless otherwise specified, the description will be of the structure when no input is applied to mounts 1', 1 and mounts 1', 1 are in a stationary, normal state, as shown in each drawing.

[0018] For ease of explanation, the configurations of the mount skeleton 1'' and the mounts 1', 1 will be briefly explained below, and then each step of the method for manufacturing the hydromount of this embodiment will be explained in more detail.

[0019] In this specification, the central axis O of the external cylinder member 2 is regarded as the central axis O of the mount skeleton 1'' and the mounts 1', 1, respectively. In addition, in this specification, as shown by arrows in each drawing, a direction parallel to the central axis O of the mount skeleton 1'' and the mounts 1', 1 is referred to as the "axial direction (A)", one side in the axial direction A is referred to as the "first axial side (A1)", and the other side in the axial direction A is referred to as the "second axial side (A2)". In this embodiment, for example, the axial direction A is approximately vertical, the first axial side A1 is the upper side, and the second axial side A2 is the lower side, and the mount 1 is configured as a hanging type, but the axial direction may be oriented in any direction. For example, the mount 1 may be configured as a compression type by making the first axial side A1 the lower side and the second axial side A2 the upper side. Furthermore, in this specification, unless otherwise specified, the side farther from the center of the mount skeleton 1'' and mount 1', 1 in the axial direction is referred to as the "axial outer side", the side closer to the center of the mount skeleton 1'' and mount 1', 1 in the axial direction is referred to as the "axial inner side", the direction perpendicular to the central axis O of the mount skeleton 1'' and mount 1', 1 is referred to as the "axial direction", the side closer to the central axis O of the mount skeleton 1'' and mount 1', 1 is referred to as the "inner peripheral side", the side farther from the central axis O of the mount skeleton 1'' and mount 1', 1 is referred to as the "outer peripheral side", the circumferential direction centered on the central axis O of the mount skeleton 1'' and mount 1', 1 is referred to as the "circumferential direction", and the radial direction centered on the central axis O of the mount skeleton 1'' and mount 1', 1 is referred to as the "radial direction".

[0020] As shown in Figures 1, 4 and 6, in the mount skeleton 1'' and the mounts 1', 1, the outer tubular member 2 has a generally cylindrical shape extending in the axial direction A. The outer tubular member 2 is configured so that various other members can be disposed inside it. As shown in Figure 6, the outer tubular member 2 is configured so that it is connected to a vehicle body bracket BV serving as a vibration receiving member when the hydromount 1 is in use. In this embodiment, the outer tube member 2 has a main body portion 21, a flange portion 22, and an annular portion 23. The main body portion 21 has a tubular shape (for example, a cylindrical shape) extending in the axial direction A. The flange portion 22 extends from an end portion of the main body portion 21 on the axial first side A1 to the outer periphery side. The flange portion 22 is configured to be connected to a vehicle body bracket BV as a vibration receiving member via a fastening member F1 such as a bolt (FIG. 6). The annular portion 23 extends from an end portion of the main body portion 21 on the axial second side A2 to the inner periphery side (more specifically, the inner periphery side and the axial second side A2 in the example of the figure) and terminates just before reaching the central axis O, thereby extending all around the central axis O and thus extending in an annular shape. The inner periphery end portion of the annular portion 23 defines a central hole 23h located on the central axis O. However, the shape of the outer tubular member 2 may be different from that in this embodiment. In this embodiment, the outer cylinder member 2 is made of metal (for example, aluminum), but may be made of other materials such as resin.

[0021] As shown in Figures 1, 4 and 6, in the mount skeleton 1'' and the mounts 1', 1, the inner member 3 extends in the axial direction A. The inner member 3 is configured to be inserted through a central hole 23h of the outer tubular member 2, and a portion of the inner member 3 on the first axial side A1 is positioned inside the outer tubular member 2. As shown in Figure 6, the inner member 3 is configured to be connected to an engine bracket BE, which serves as a vibration generating member, when the hydromount 1 is in use. Examples of materials constituting the inner member 3 include metal and / or resin. In this embodiment, the inner member 3 has a pin portion 32 and a piston portion 31. The pin portion 32 is configured in a rod shape extending in the axial direction A coaxially with the outer tubular member 2. The pin portion 32 is configured to be inserted through a central hole 23h of the outer tubular member 2, and a tip portion 32t on the first axial side A1 of the pin portion 32 is positioned inside the outer tubular member 2. In this embodiment, the pin portion 32 has an internal thread on the second axial side A2, and is configured to be connected to an engine bracket BE, which serves as a vibration generating member, via a fastening member F2, such as a bolt, attached to the internal thread (FIG. 6). As shown in Figs. 1 and 2, the piston portion 31 is configured to be located inside the outer tube member 2. In this embodiment, the piston portion 31 has a cap portion 311 and a wing portion 312. The cap portion 311 is configured in a cap shape having a recess 311r with the axial second side A2 open, and is configured to be fixed to the tip portion 32t of the pin portion 32 in a state where the tip portion 32t of the axial first side A1 of the pin portion 32 is inserted into the recess 311r. The wing portion 312 extends from the cap portion 311 to the outer periphery side (more specifically, the outer periphery side and the axial first side A1 in the example of the figure). In this embodiment, the wing portion 312 extends around the entire circumference, and is thus annular. The outer diameter of the blade portion 312 is larger than the diameter of the central hole 23h of the outer cylinder member 2, thereby preventing the piston portion 31 from slipping out of the central hole 23h of the outer cylinder member 2 to the second axial side A2. However, the pin portion 32 and the piston portion 31 may be integrally formed, so that the inner member 3 is formed from a single member. In this embodiment, the pin portion 32 is made of metal (for example, aluminum), but may be made of other materials such as resin. In this embodiment, the piston portion 31 is made of resin, but may be made of other materials such as metal (for example, aluminum). The pin portion 32 and the piston portion 31 may be made of different materials, or may be made of the same material.

[0022] In the mount 1', 1, the main body rubber 4 is made of rubber and is configured to connect the outer tube member 2 and the inner member 3 together, as shown in Figures 3 and 4. The main body rubber 4 is located on the second axial side A2 relative to the partition member 6 and inside the outer tube member 2.

[0023] In the mounts 1' and 1, the diaphragm 5 is made of rubber. The diaphragm 5 is located on the first axial side A1 relative to the partition member 6, as shown in FIGS.

[0024] In the mount skeleton 1'' and the mounts 1', 1, the partition member 6 is configured so as to be located on the first axial side A1 relative to the inner member 3, as shown in FIG. In this embodiment, the partition member 6 is configured in a substantially plate shape, and has a main body portion 66 and a flange portion 67. The main body 66 is configured to be substantially plate-shaped (for example, substantially disk-shaped). The main body 66 is configured to cover substantially the entire open end face of the axial first side A1 of the outer tube member 2, and the outer peripheral surface of the main body 66 is configured to contact the inner peripheral surface of the main body 21 of the outer tube member 2. The flange portion 67 extends from the outer peripheral end of the main body portion 66 toward the axial first side A1 and then extends toward the outer peripheral side. The flange portion 67 extends all around the central axis O, thereby forming an annular shape. The surface of the flange portion 67 on the axial second side A2 is configured to contact the surface of the flange portion 22 of the outer tube member 2 on the axial first side A1. In the mounts 1', 1 (Figs. 3 and 4), the partition member 6 is located between the main rubber 4 and the diaphragm 5 in the axial direction A. In the hydrophilic mount 1 (Fig. 4), a main liquid chamber R2 is defined between the partition member 6 and the main rubber 4 in the axial direction A, and an auxiliary liquid chamber R1 is defined between the partition member 6 and the diaphragm 5 in the axial direction A. As a result, it can be said that the partition member 6 divides the liquid chamber R in the hydrophilic mount 1 into the main liquid chamber R2 and the auxiliary liquid chamber R1 in the axial direction A. The partition member 6 has an orifice 64. In the hydraulic mount 1 (FIG. 4), the orifice 64 connects the primary liquid chamber R2 and the secondary liquid chamber R1. This allows the hydraulic fluid L in the liquid chamber R to move between the primary liquid chamber R2 and the secondary liquid chamber R1 via the orifice 64 (FIG. 6). This in turn provides a vibration damping effect due to the flow resistance of the hydraulic fluid L moving back and forth within the orifice 64. Furthermore, dynamic characteristics at a predetermined frequency can be obtained by liquid resonance within the orifice 64. Although the partition member 6 is made of resin in this embodiment, it may be made of other materials such as metal (for example, aluminum).

[0025] Next, each step of the method for manufacturing the hydrostatic mount of this embodiment will be described in more detail.

[0026] First, in the mount skeleton creating step (FIG. 1), the outer cylinder member 2, the inner member 3, and the partition member 6, which are prepared in advance, are assembled together to create the mount skeleton 1'' (FIG. 2). In the mount skeleton fabrication process, some or all of the components that make up the mount skeleton 1'' (the outer tube member 2, the inner member 3, and the partition member 6) are subjected to a surface treatment to promote joining (fixing) to other components. As a result, the two components that butt (contact) each other at the surface-treated portions are subsequently joined (fixed) to each other.

[0027] More specifically, in the mount skeleton fabrication step (FIG. 1), in this embodiment, when the inner member 3 is assembled, first, a surface treatment is applied to the outer peripheral surface of the tip 32t of the pin portion 32, thereby forming a piston portion joint portion 34 (indicated by dot hatching in each drawing) that has been subjected to the surface treatment. The piston portion joint portion 34 is configured so as to promote joining with the piston portion 31 when the pin portion 32 and the piston portion 31 are subsequently assembled together. Thereafter, with the piston portion 31 placed inside the outer tube member 2, the tip portion 32t of the pin portion 32 is inserted into the recess 311r of the cap portion 311 of the piston portion 31. As a result, the tip portion 32t of the pin portion 32 fits into the recess 311r of the piston portion 31, and the pin portion 32 and the piston portion 31 are joined together at the piston portion joint portion 34. In addition, when one of the pin portion 32 and the piston portion 31 (in this embodiment, the pin portion 32) is made of metal and the other of the pin portion 32 and the piston portion 31 (in this embodiment, the piston portion 31) is made of resin as in this embodiment, when assembling the pin portion 32 and the piston portion 31 together, the one of the pin portion 32 and the piston portion 31 made of metal (in this embodiment, the pin portion 32) may be heated by electromagnetic induction heating or the like and hot-pressed into the one of the pin portion 32 and the piston portion 31 made of resin (in this embodiment, the piston portion 31). In this case, the joining at the joining portion 34 to the piston portion can be made more reliable. It is preferable that the tip portion 32t of the pin portion 32 and the recessed portion 311r of the cap portion 311 of the piston portion 31 are configured in a tapered shape that tapers toward the first axial side A1, as in the example shown in FIG. However, the piston portion joint 34 is not essential. As described above, the pin portion 32 and the piston portion 31 may be integrally formed, so that the inner member 3 is made of a single member.

[0028] In the mount framework preparation step (FIG. 1), in this embodiment, at least a part of the surface of the inner member 3 is subjected to a surface treatment, thereby forming a body rubber joint 33 (indicated by dot hatching in each drawing) that has been subjected to the surface treatment. The body rubber joint 33 is configured so as to promote joining with the body rubber 4 in the subsequent vulcanization step (FIGS. 2 to 3). More specifically, as in the example shown in FIG. 1, it is preferable to form the body rubber joint 33 on at least a part of the surface of the vane portion 312 of the piston portion 31 of the inner member 3. In the example shown in FIG. 1, the body rubber joint 33 is not formed on the surface of the cap portion 311 of the piston portion 31 of the inner member 3, but the body rubber joint 33 may be formed on at least a part of the surface of the cap portion 311. Then, in the vulcanization process (FIGS. 2 and 3), the inner member 3 and the main body rubber 4 are joined together at the main body rubber joining portion 33. However, the rubber-to-main-body joint 33 is not essential.

[0029] In the mount skeleton fabrication process (FIG. 1), in this embodiment, when assembling the partition member 6 and the outer tube member 2 together, first, a surface treatment is applied to the inner peripheral surface of the main body 21 of the outer tube member 2, which is to come into contact with the partition member 6, thereby forming a partition member joint 24 (indicated by dot hatching in each drawing) that has been subjected to the surface treatment. The partition member joint 24 is configured so as to promote joining with the partition member 6 when the partition member 6 and the outer tube member 2 are subsequently assembled together. Thereafter, with the piston portion 31 of the inner member 3 disposed inside the outer tube member 2, the main body 66 of the partition member 6 is inserted into the main body 21 of the outer tube member 2 until the flange portion 67 of the partition member 6 abuts against the flange portion 22 of the outer tube member 2. As a result, the main body 66 of the partition member 6 fits into the main body 21 of the outer tubular member 2, and the partition member 6 and the outer tubular member 2 are joined to each other at the partition member joint 24. In this embodiment, when one of the partition member 6 and the outer tube member 2 (in this embodiment, the outer tube member 2) is made of metal and the other of the partition member 6 and the outer tube member 2 (in this embodiment, the partition member 6) is made of resin, when assembling the partition member 6 and the outer tube member 2 together, the one of the partition member 6 and the outer tube member 2 made of metal (in this embodiment, the outer tube member 2) may be heated by electromagnetic induction heating or the like, and hot-pressed into the one of the partition member 6 and the outer tube member 2 made of resin (in this embodiment, the partition member 6). In this case, the joining at the partition member-to-partition member joining portion 24 can be made more reliable. However, the partition member joint 24 is not essential.

[0030] In the mount skeleton preparation step (FIG. 1), in this embodiment, at least a part of the surface of the outer tube member 2 that will come into contact with the main body rubber 4 is subjected to a surface treatment, thereby forming a body rubber joint 25 (indicated by dot hatching in each drawing) that has been subjected to the surface treatment. The body rubber joint 25 is configured so as to promote joining with the main body rubber 4 in the subsequent vulcanization step (FIGS. 2 to 3). More specifically, as in the example shown in FIG. 1, it is preferable to form the body rubber joint 25 on at least a part of the surface of the axial first side A1 of the annular portion 23 of the outer tube member 2. In the example shown in FIG. 1, the body rubber joint 25 is not formed on the inner peripheral surface of the main body portion 21 of the outer tube member 2, but the body rubber joint 25 may be formed on at least a part of the inner peripheral surface of the main body portion 21 of the outer tube member 2 that will come into contact with the main body rubber 4. Then, in the vulcanization process (FIGS. 2 and 3), the outer tube member 2 and the main body rubber 4 are joined together at the main body rubber joining portion 25. However, the rubber-to-main-body joint 25 is not essential.

[0031] In the mount skeleton preparation step (FIG. 1), in this embodiment, a part of the surface of the axial first side A1 of the partition member 6 is subjected to a surface treatment, thereby forming a diaphragm joint 61 (indicated by dot hatching in each drawing) that has been subjected to the surface treatment. The diaphragm joint 61 is configured so as to promote joining with the diaphragm 5 in the subsequent vulcanization step (FIGS. 2 to 3). As shown in FIG. 1, it is preferable to form the diaphragm joint 61 only on the outer peripheral part of the surface of the axial first side A1 of the partition member 6. For example, it is preferable to form the diaphragm joint 61 only on at least a part of the surface of the axial first side A1 of the flange portion 67 of the surface of the axial first side A1 of the partition member 6. The diaphragm joint 61 extends all around the central axis O, thereby forming an annular shape. As in the example shown in FIG. 1, it is preferable that the surface of the main body portion 66 of the partition member 6 on the first axial side A1 not have the diaphragm joint portion 61 formed thereon. Then, in the vulcanization step (FIGS. 2 and 3), the partition member 6 and the diaphragm 5 are joined to each other at the diaphragm joint portion 61. As shown in FIG.

[0032] In the mounting skeleton creation process (Figure 1), it is preferable that the surface of the second axial side A2 of the partition member 6 is not subjected to a surface treatment to promote joining with other members (the main body rubber 4 and the inner member 3). In addition, in the mount skeleton fabrication process (FIG. 1), it is preferable that the end face 35 on the first axial side A1 of the inner member 3 is not subjected to a surface treatment for promoting bonding with the partition member 6.

[0033] In addition, the above-mentioned surface processing in each of the piston joint 34, the main body rubber joint 33, the partition member joint 24, the main body rubber joint 25, and the diaphragm joint 61 can be, for example, a surface processing by laser on the surface to be processed, thereby forming a large number of minute grooves (and thus unevenness) on the surface. In this case, the anchor effect promotes the joining of two members that contact each other on the surface. For example, the surface processing described in JP 2020-116862 A and JP 6489908 A can be adopted. Alternatively, the above-mentioned surface treatment for each of the piston portion joint 34, the main body rubber joint 33, the partition member joint 24, the main body rubber joint 25 and the diaphragm joint 61 may be, for example, a method of applying an adhesive to the surface to be treated.

[0034] In the vulcanization process (Figure 2), with the mount skeleton 1'' set inside the vulcanization molding mold M, unvulcanized rubber is injected into the vulcanization molding mold M and vulcanization molding is performed to obtain a liquid-free mount 1' (Figure 3). 2, the vulcanization molding mold M includes a first split mold M1 and a second split mold M2 that are split into two in the axial direction A. The first split mold M1 is located on a first side A1 in the axial direction with respect to the second split mold M2. When the mount skeleton 1'' is set in the vulcanization molding die M, a first cavity V1 and a second cavity V2 are defined in the vulcanization molding die M. The first cavity V1 is defined by a molding surface of the first split die M1 facing the second axial side A2 and a surface of the partition member 6 on the first axial side A1, and is configured to mold the diaphragm 5. The second cavity V2 is defined by a molding surface of the second split die M2 facing the first axial side A1 (more specifically, in this embodiment, the annular protrusion M21 described below), the surface of the partition member 6 on the second axial side A2, the surface of the inner member 3 (more specifically, the piston portion 31), and the inner surface of the outer tube member 2, and is configured to mold the main rubber 4. In the vulcanization process, unvulcanized rubber is injected into the first cavity V1 and the second cavity V2, thereby forming the diaphragm 5 and the main body rubber 4. The first cavity V1 and the second cavity V2 may or may not be connected to each other. In the vulcanization step, as in the example shown in FIG. 2, it is preferable that the orifice 64 of the partition member 6 is blocked by a part of the vulcanization molding die M or the like so that the rubber does not enter the orifice 64.

[0035] In the vulcanization process, among the parts where the components made of materials other than rubber (outer tube member 2, inner member 3, partition member 6) and the components made of rubber (main body rubber 4, diaphragm 5) that make up the mount skeleton 1'' come into contact with each other, in the parts that have been subjected to the above-mentioned surface processing treatment (main body rubber joint 33, main body rubber joint 25, diaphragm joint 61), the two components that come into contact with each other at these parts are joined to each other, whereas in other parts, the two components that come into contact with each other at these parts are not joined (fixed) to each other. Therefore, in the liquid-free mount 1' (Fig. 3) obtained by the vulcanization process, the partition member 6 has a surface on the first axial side A1 which has a diaphragm-attached portion 61 joined to the diaphragm 5 over the entire circumference, and a diaphragm-unattached portion 62 which is located on the inner circumference side of the diaphragm-attached portion 61 and is in contact with but not joined to the diaphragm 5. Also, in the liquid-free mount 1', the partition member 6 has a body-rubber-unattached portion 63 on the surface on the second axial side A2 which is in contact with but not joined to the body rubber 4 over almost the entire circumference. In addition, in the liquid-free mount 1' (Figure 3), the surface of the inner member 3 is joined to the main body rubber 4 at the main body rubber joint 33, whereas other parts that come into contact with the main body rubber 4 are not joined to the main body rubber 4. In addition, in the liquid-free mount 1' (Figure 3), the surface of the outer tube member 2 is joined to the main body rubber 4 at the main body rubber joint 25, while other parts that come into contact with the main body rubber 4 are not joined to the main body rubber 4.

[0036] For ease of explanation, the gap between the diaphragm non-jointed portion 62 of the partition member 6 and the diaphragm 5 is referred to as the "first gap G1," and the gap between the main body rubber non-jointed portion 63 of the partition member 6 and the main body rubber 4 is referred to as the "second gap G2." However, in the liquid-free mount 1', the first gap G1 and the second gap G2 may be in a nearly or completely collapsed state.

[0037] In the liquid-free mount 1', the orifice 64 of the partition member 6 communicates with both the first gap G1 and the second gap, in other words, the first gap G1 and the second gap communicate with each other (FIG. 3).

[0038] In the hydraulic fluid injection step (FIG. 4), hydraulic fluid L is injected into the liquid-free mount 1', thereby obtaining the hydraulic mount 1 (FIG. 4). More specifically, in the hydraulic fluid injection process, the hydraulic fluid L enters the first gap G1 between the diaphragm non-jointed portion 62 of the partition member 6 and the diaphragm 5, and the first gap G1 expands due to the hydraulic fluid L, forming the auxiliary liquid chamber R1, and the hydraulic fluid L enters the second gap G2 between the main body rubber non-jointed portion 63 of the partition member 6 and the main body rubber 4, and the second gap G2 expands due to the hydraulic fluid L, forming the main liquid chamber R2, thereby obtaining the hydraulic mount 1. At this time, the outer periphery of the auxiliary liquid chamber R1 is sealed by the diaphragm joint 61 extending over the entire circumference, preventing liquid leakage. The outer periphery of the main liquid chamber R2 is sealed by the partition member joint 24 and the main body rubber joint 25, preventing liquid leakage. The main body rubber joint 33 can also have a sealing function to prevent liquid leakage from the main liquid chamber R2.

[0039] In the hydraulic mount 1 (FIG. 4), the orifice 64 of the partition member 6 connects the primary fluid chamber R2 and the secondary fluid chamber R1 to each other. This allows the hydraulic fluid L in the fluid chamber R to move between the primary fluid chamber R2 and the secondary fluid chamber R1 via the orifice 64 (FIG. 6).

[0040] When the hydromount 1 is in use, as shown in Fig. 6, the outer cylinder member 2 is connected to a vehicle body bracket BV as a vibration receiving member, and the inner member 3 is connected to an engine bracket BE as a vibration generating member. The primary fluid chamber R2 expands and contracts in response to vibration in the axial direction A of the vibration generating member BE, and accordingly, the working fluid L flows back and forth through the orifice 64, expanding and contracting the secondary fluid chamber R1. In this way, a vibration damping effect can be achieved by the flow resistance of the working fluid L flowing back and forth within the orifice 64. Furthermore, dynamic characteristics at a predetermined frequency can be obtained by liquid resonance within the orifice 64.

[0041] 6, it is preferable that the engine bracket BE is provided with a rebound stopper S made of rubber or the like at a portion that collides with the outer tubular member 2 during vibration in the axial direction A. In this case, the impact inside the hydrolic mount 1 when the engine bracket BE and therefore the inner member 3 are displaced toward the first axial side A1 (for example, the impact caused by the collision between the inner member 3 and the partition member 6) can be mitigated, and damage to the inside of the hydrolic mount 1 can be suppressed.

[0042] According to the method for manufacturing a liquid-sealed mount of this embodiment, as described above, in the vulcanization step, a liquid-free mount 1' is obtained that includes an outer tube member 2, an inner member 3, a main body rubber 4, a diaphragm 5, and a partition member 6, and in this step, the surface of the partition member 6 of the liquid-free mount 1' has a diaphragm-attached portion 61, a diaphragm-non-attached portion 62, and a main body rubber-non-attached portion 63. In the hydraulic fluid injection step, the hydraulic fluid L enters the first gap G1 between the diaphragm-non-attached portion 62 of the partition member 6 and the diaphragm 5 to form an auxiliary liquid chamber R1, and the hydraulic fluid L enters the second gap G2 between the main body rubber-non-attached portion 63 of the partition member 6 and the main body rubber 4 to form a main liquid chamber R2. The outer periphery of the auxiliary liquid chamber R1 is sealed by the diaphragm-attached portion 61 that extends over the entire circumference. In this way, the diaphragm 5 and the main rubber 4 are formed by performing the vulcanization process only once, and the first gap G1 and the second gap G2 in the diaphragm non-joining portion 62 and the main rubber non-joining portion 63, which are the portions of the partition member 6 that are not joined to the diaphragm 5 and the main rubber 4, are expanded to be utilized as the auxiliary liquid chamber R1 and the main liquid chamber R2, and the diaphragm joint portion 61, which is the portion of the partition member 6 that is joined to the diaphragm 5, can be utilized as a sealing portion. Furthermore, compared to, for example, a case in which a plurality of combined members are manufactured in advance through a plurality of separate vulcanization processes and then these combined members are assembled and fixed by crimping, it is possible to eliminate the assembly process and crimping process after the vulcanization process, and it is possible to obtain the hydromount 1 more easily. This makes it possible to reduce costs.

[0043] In this embodiment, the piston portion 31 of the inner member 3 has a through hole 312h that penetrates the blade portion 312 in the axial direction A. This allows the main rubber 4 to enter the through hole 312h in the vulcanization process, and therefore the piston portion 31 is less likely to become displaced from the main rubber 4. However, the through hole 312h is not essential.

[0044] In this embodiment, the inner member 3 (specifically, the piston portion 31) is configured so that, when the mounting skeleton portion 1'' is set in the vulcanization molding die M for the vulcanization process (Figure 2), the end face 35 of the axial first side A1 of the inner member 3 (specifically, the piston portion 31) contacts the surface of the axial second side A2 of the partition member 6. This makes it possible to prevent the inner member 3 from shifting in position (particularly, being displaced toward the axial first side A1) while the unvulcanized rubber flows through the second cavity V2 in the vulcanization process (Figure 2). In this embodiment, when the mount skeleton 1'' is set in the vulcanization molding die M, the inner member 3 (specifically, the pin portion 32) is accommodated in the central recess M22 of the annular protrusion M21 on the molding surface of the second split die M2 of the vulcanization molding die M (FIG. 2). The annular protrusion M21 of the second split die M2 is configured to enter the inside of the outer tube member 2 on the inner peripheral side of the central hole 23h of the annular portion 23 of the outer tube member 2 and protrude toward the first side A1 in the axial direction. The annular protrusion M21 extends all around the central axis O, thereby forming an annular shape. The central recess M22 of the annular protrusion M21 is located on the central axis O. In this embodiment, when the mounting skeleton 1'' is set in the vulcanization molding mold M, displacement of the inner member 3 toward the axial first side A1 is suppressed by contact between the end face 35 of the axial first side A1 of the inner member 3 (specifically, the piston portion 31) and the surface of the axial second side A2 of the partition member 6, and displacement toward the axial second side A2 and displacement perpendicular to the axis are suppressed by the inner member 3 (specifically, the pin portion 32) being accommodated in the central recess M22 of the annular convex portion M21 of the second split mold M2. However, these configurations are not essential.

[0045] In this embodiment, in the hydraulic fluid injection step (FIG. 4), the hydraulic fluid L is injected into the liquid-free mount 1′ from the injection tube 7 (FIG. 3) that is integrally formed with the diaphragm 5 in the vulcanization step (FIG. 4). The first cavity V1 of the vulcanization mold M is configured to form the injection tube 7 in addition to the diaphragm 5 (FIG. 2). The injection tube 7 is made of rubber and is configured in a cylindrical shape. In the liquid-free mount 1′, the central hole 71 of the injection tube 7 communicates with the first gap G1 and the orifice 64 of the partition member 6 (FIG. 3). As described above, the orifice 64 communicates with each of the first gap G1 and the second gap G2. In the hydraulic fluid injection step (FIG. 4), the hydraulic fluid L (indicated by the dashed arrow in FIG. 4) injected from the injection tube 7 enters the first gap G1 and also enters the second gap G2 via the orifice 64 (FIG. 4). In this way, by injecting the working fluid L through the injection tube 7 (Figure 3) formed integrally with the diaphragm 5, the mechanism for injecting the working fluid L and the manufacture of the mechanism, as well as the work of injecting the working fluid L, can be simplified. However, in the hydraulic fluid injection step (FIG. 4), the hydraulic fluid L may be injected into the liquid-free mount 1' by any mechanism and method different from that of this embodiment.

[0046] In this embodiment, the liquid-free mount 1' (FIG. 3) further includes a clip portion 8 for fastening the injection tube 7. More specifically, in this embodiment, the mount skeleton portion 1'' and the mount 1', 1 include the clip portion 8, which is configured integrally with the partition member 6. The clip portion 8 may be configured from the same material as the partition member 6. More specifically, in this embodiment, the clip portion 8 is provided contiguous to the outer circumferential end of the flange portion 67 of the partition member 6. The clip portion 8 is located on the outer circumferential side of the diaphragm joint portion 61 of the partition member 6. As shown in Fig. 5, in this embodiment, the clip portion 8 has a slit 81. The slit 81 penetrates the clip portion 8 in the width direction of the mounts 1', 1 (the left-right direction in Fig. 4, the front-rear direction in Fig. 5). The slit 81 also extends in the depth direction of the mounts 1', 1 (the front-rear direction in Fig. 4, the left-right direction in Fig. 5), opens at an end face on one side in the depth direction of the clip portion 8, and terminates just before reaching an end face on the other side in the depth direction of the clip portion 8. The width of the slit 81 (the width in the direction perpendicular to the extension direction of the slit 81 in a plan view of the slit 81 (Fig. 5)) is smaller than the outer diameter of the injection tube 7. In this embodiment, the method for manufacturing a liquid mount further includes an injection tube fastening step (FIGS. 4 to 5) in which, after the hydraulic fluid injection step, the injection tube 7 is fastened to the clip portion 8 to seal the central hole 71 of the injection tube 7. In the injection tube fastening step, as shown by the arrows in FIG. 4 and FIG. 5, the injection tube 7 is inserted into the slit 81 of the clip portion 8 from an opening side on one side in the depth direction of the slit 81 toward the other side in the depth direction while the injection tube 7 is laid down on its side, thereby fastening the injection tube 7 to the clip portion 8. At this time, the injection tube 7 is crushed in the slit 81, thereby sealing the central hole 71 of the injection tube 7. As a result, the hydraulic fluid L in the liquid chamber R can be prevented from leaking out of the injection tube 7. In this way, the injection tube fastening process can simplify the mechanism for sealing the injection tube 7 and the manufacture of the mechanism, and can also simplify the task of sealing the injection tube 7 with a single touch without the need for tools. The configuration and extending direction of the slit 81 of the clip portion 8 may be different from those of this embodiment. The configuration and position of the clip portion 8 may also be different from those of this embodiment.

[0047] In this embodiment, when the injection tube 7 is fastened to the clip portion 8 in the injection tube fastening step (FIGS. 4 and 5), the diaphragm 5 integrated with the injection tube 7 is pulled by the injection tube 7, and the communication portion J between the first gap G1 and the orifice 64 is widened. This makes it easier for the working fluid L to move between the first gap G1 and the orifice 64. However, this is not essential.

[0048] In this embodiment, the vibration receiving member BV and the vibration generating member BE are a vehicle body bracket and an engine bracket, respectively, and the hydraulic mount 1 is configured as an engine mount. However, the hydraulic mount 1 may be used for other purposes, and the vibration receiving member BV and the vibration generating member BE may be members other than a vehicle body bracket and an engine bracket, respectively.

[0049] In addition, in this embodiment, the liquid mount 1 is configured as a hanging type by positioning the main liquid chamber R2 below the auxiliary liquid chamber R1, but it may also be configured as a compression type by positioning the main liquid chamber R2 above the auxiliary liquid chamber R1. [Industrial Applicability]

[0050] The hydrostatic mount obtained by the hydrostatic mount manufacturing method of the present invention is suitable for use, for example, in a vehicle vibration isolation device, and is particularly suitable for use in a vibration isolation device for low-cost vehicles such as ultra-compact mobility vehicles. [Explanation of symbols]

[0051] 1: Liquid mount (mount), 1': mount without liquid (mount); 1): Mounting structure, 2: outer cylinder member, 21: main body portion, 22: flange portion, 23: annular portion, 23h: central hole, 24: partition member joint portion, 25: main body rubber joint portion, 3: inner member, 31: piston portion, 311: cap portion, 311r: recess, 312: blade portion, 312h: through hole, 32: pin portion, 32t: tip portion, 33: rubber joint portion for main body, 34: joint portion for piston portion, 35: end face on first side in axial direction, 4: Body rubber, 5: diaphragm, 6: partition member, 61: diaphragm joint portion, 62: diaphragm non-joining portion, 63: main body rubber non-joining portion, 64: orifice, 65: outer tubular member joint portion, 66: main body portion, 67: flange portion, G1: First gap (gap), G2: Second gap (gap), L: hydraulic fluid, R: Liquid chamber, R1: Sub-liquid chamber, R2: Main liquid chamber, J: a communication portion between the first gap and the orifice, 7: injection tube; 71: central hole; 8: clip part, 81: slit, A: Axial direction, A1: Axial direction first side, A2: Axial direction second side, O: Central axis M: vulcanization molding die, M1: first split die, M2: second split die, M21: annular convex portion, M22: central concave portion, V1: first cavity, V2: second cavity, BE: Engine bracket (vibration generating component), BV: Body bracket (vibration receiving component), S: Rebound stopper, F1, F2: Fastening members

Claims

1. A method for manufacturing a hydromount, comprising the steps of: a vulcanization step for obtaining a liquid-free mount by vulcanization molding; a hydraulic fluid injection step of injecting hydraulic fluid into the hydraulic mount; Including, The liquid-free mount is An outer cylinder member; An inner member; a main body rubber that connects the outer tube member and the inner member together; A diaphragm; a partition member located between the main rubber and the diaphragm; Equipped with The surface of the partition member of the liquid-free mount is a diaphragm joint portion joined to the diaphragm over an entire periphery; a non-jointed portion with respect to the diaphragm, the non-jointed portion being located on an inner peripheral side of the diaphragm-jointed portion and being in contact with the diaphragm but not joined thereto; a non-bonded portion to the main body rubber that is not bonded to but is in contact with the main body rubber; It has A liquid-sealed mount manufacturing method in which, in the hydraulic fluid injection process, a secondary liquid chamber is formed by the hydraulic fluid entering a first gap between the diaphragm-to-diaphragm non-jointed portion of the partition member and the diaphragm, and a main liquid chamber is formed by the hydraulic fluid entering a second gap between the main body rubber non-jointed portion of the partition member and the main body rubber, thereby obtaining the liquid-sealed mount.

2. 2. The method for manufacturing a hydrophilic mount according to claim 1, wherein the partition member of the hydrophilic mount has an orifice that connects the first gap and the second gap to each other.

3. The liquid-free mount further comprises an injection tube integrally formed with the diaphragm; In the liquid-free mount, a central hole of the injection tube communicates with the first gap and the orifice; The method for manufacturing a hydrostatic mount according to claim 2 , wherein in the hydraulic fluid injection step, the hydraulic fluid is injected through the injection tube.

4. The liquid-free mount further includes a clip portion for fastening the injection tube; 4. The method for manufacturing a hydromount according to claim 3, further comprising, after the hydraulic fluid injection step, an injection tube fastening step of fastening the injection tube to the clip portion to seal the central hole of the injection tube.

5. 5. The method for manufacturing a hydrostatic mount according to claim 4, wherein in the injection tube fastening step, the diaphragm is pulled by the injection tube, thereby widening a communication portion between the first gap and the orifice.

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