JP3907268B2 - Caulking method - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method of superimposing outer peripheral portions of two circular members and caulking the outer peripheral portions with a caulking ring member.
[0002]
[Prior art]
The outer peripheral portions of the two circular members are overlapped, and a metal caulking ring member is disposed along each outer peripheral portion, and the caulking ring member is bent into a substantially U-shaped cross section so that the two circular members are A method of joining each outer peripheral portion by caulking is known.
[0003]
[Problems to be solved by the invention]
By the way, according to the above method, when the caulking ring member is bent into a substantially U-shape, the bending point is not constant, and in particular, if these two circular members are relatively easily deformable soft members such as rubber. The bent part is not sharp and is inaccurate. In addition, when joining that requires airtightness, airtightness may be impaired.
[0004]
Further, in order to prevent such a situation, the outer peripheral end surfaces of these two circular members are attached and reinforced with an edge member formed in a substantially U-shaped cross section in advance, and the caulking ring member is caulked from above. However, in this case, since a specially shaped edging member must be prepared in advance, a lot of labor and cost are required.
[0005]
[Means for Solving the Problems]
In order to solve the above-mentioned problem, the caulking method according to the present invention is such that the outer peripheral portions of two circular members are overlapped, and the metal caulking ring members disposed along the respective outer peripheral portions have a substantially U-shaped cross section. In the caulking method in which the outer peripheral portions of the two circular members are bent and joined, before the caulking ring member is caulked, the belt-like support ring is rounded so as to follow each outer peripheral portion of the circular member. A caulking method characterized by disposing the caulking ring member while reducing the diameter of the supporting ring so as to be inwardly arranged by providing a gap without connecting both ends in the vertical direction.
[0006]
At this time. Each of the two circular members may be formed of a non-metallic material that is relatively easy to deform as compared with a metallic material.
[0007]
Furthermore, the two circular members are configured to face each other to form a sealed space, and at least one of the circular members is formed of a soft elastic member such as rubber, and the outer periphery of the soft elastic member The caulking part is joined to the inner peripheral side of the caulking ring member, and the outer peripheral side of the caulking ring member is wrapped around the outer peripheral part of the other circular member, thereby joining the two circular members at the caulking part. Can also be fluid tightly sealed. The fluid tightness in this case includes both liquid tightness and air tightness.
[0008]
In addition, the two circular members are an elastic membrane and a resin bottom member constituting a valve assembly for opening and closing the orifice passage in the vibration isolator having an openable and closable orifice passage. It can also be used as a pressure chamber.
[0009]
【The invention's effect】
In the present invention, before the caulking ring member is caulked, the belt-like support ring is rounded and arranged along each outer peripheral portion of the circular member. Since it is bent, the caulking ring member is bent sharply at the contact portion with the support ring.
[0010]
Thus, the support ring functions to provide a folding point when crimping the caulking ring member, allowing the folding to be sharp and accurate.
[0011]
In addition, a simple strip-shaped member is sufficient for the support ring, and it is not necessary to process with special accuracy when rolling it into a ring. Costs and processing costs are significantly lower than the effects achieved, and this type of processing costs can be significantly reduced.
[0012]
At this time. Even if each of the two circular members is made of a non-metallic material that is relatively easy to deform as compared with the metallic material, it can be bent sharply by the support ring.
[0013]
Furthermore, the two circular members are configured to face each other to form a sealed space, and at least one of the circular members is formed of a soft elastic member such as rubber, and the outer periphery of the soft elastic member When the inner peripheral side of the caulking ring member is integrated with the caulking ring and the outer peripheral side of the caulking ring member is wrapped around the outer peripheral part of the other circular member, the caulking portion is Even if the elastic member is a soft elastic member, the outer peripheral portions of the two circular members can be accurately bonded to each other, and at this time, the elastic member is press-contacted, so that the bonded portion can be fluid-tightly sealed.
[0014]
In addition, the two circular members are an elastic film and a resin bottom member constituting a valve assembly in a vibration isolator having an openable / closable orifice passage, and a negative pressure chamber is formed between the two members. Even if it exists, since the bending part of the caulking ring member can be formed sharply and accurately as described above, the outer peripheral parts can be joined in an airtight manner, and such a vibration isolator can be advantageously assembled.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 7 is an overall cross-sectional view along the main vibration input direction of a liquid ring mount configured as an automobile engine mount. First, the schematic structure of the liquid ring mount will be described with reference to FIG.
[0016]
This liquid seal mount includes a first mounting bracket 1 that is mounted on the engine side that is a vibration source, a second mounting bracket 2 that is mounted on the vehicle body side that is the vibration receiving side, and an elastic member 3 that connects them. ing.
[0017]
The elastic member 3 includes a conical portion 4 having a substantially frustoconical outer shape made of rubber, an appropriate elastomer, and the like, and a cylindrical portion 5 continuously extending from the lower bottom side thereof, and an opening is provided on the cylindrical portion 5 side. A recess is provided on the inner side, a main liquid chamber 6 is formed in the recess, and an incompressible liquid is enclosed.
[0018]
An intermediate cylindrical fitting 7 is integrated on the outer periphery of the cylindrical portion 5, and a flange portion 8 is formed at a lower portion thereof, and is formed at the upper end portion of the cylindrical fitting 10 constituting a part of the second mounting bracket 2. The upper flange portion 11 is overlapped and crimped.
[0019]
A mounting flange 12 is also formed in the lower portion of the cylindrical metal fitting 10 and can be attached to the vehicle body side or the like by using this.
[0020]
A partition member 13 is fitted inside the cylindrical metal fitting 10. The partition member 13 includes a circular plate 14 whose outer peripheral portion is sandwiched and fixed between the flange portion 8 and the upper flange portion 11, a cup member 15, and a support member 16 having a substantially cup shape that supports the cup member 15. Become.
[0021]
The cup member 15 is a thick member formed of rubber or an appropriate resin material in a substantially cup shape opened downward, and a side wall portion along the inner wall of the cylindrical fitting 10 and the transverse portion 15a substantially parallel to the circular plate 14. 15b is integrally formed.
[0022]
The transverse portion 15 a is provided so as to close the main liquid chamber 6 together with the circular plate 14, and the first orifice passage 17 is formed through the center portion, and the second outer circumference portion surrounding the first orifice passage 17 has a second thickness. An orifice passage 18 is formed.
[0023]
The second orifice passage 18 is formed in a substantially spiral shape, and a lower portion thereof is formed within the thickness of the side wall portion 15b. A communication port 19 is provided between the support member 16 and the diaphragm 20 disposed on the inside thereof. It communicates with the auxiliary liquid chamber 21 formed in the above.
[0024]
In addition, each main liquid chamber 6 side of the first orifice passage 17 and the second orifice passage 18 is formed with communication ports 14 a and 14 b in the circular plate 14. It is communicated.
[0025]
However, the first orifice passage 17 is opened and communicated only under a certain condition (idle operation state) by opening and closing the opening on the side of the sub liquid chamber 21 by the diaphragm 20 as will be described later.
[0026]
The flange portion 22 formed at the lower end portion of the support member 16 and the flange portion 23 integrated with the outer peripheral side end portion of the diaphragm 20 are overlapped with each other, and a horizontal overhang of the press-fit member 24 press-fitted into the inside of the cylindrical metal fitting 10 is overlapped. The part 25 is sandwiched between the end faces of the side wall part 15b.
[0027]
A part of the press-fitting member 24 is a side portion 26 extending substantially parallel to the inner wall of the cylindrical metal fitting 10, and together with a holding plate 27 integrated with the mounting flange 12 and the horizontal projecting portion 25, a valve assembly 30 to be described later. The outer periphery is fixed.
[0028]
The valve assembly 30 is accommodated in a space 28 on the opposite side of the sub liquid chamber 21 surrounded by the diaphragm 20, and is integrated with the valve 31, the elastic membrane portion 32 that extends integrally around the valve 31, and the outer peripheral portion thereof. This is a hollow member in which a negative pressure chamber 34 is formed by a bottom member 33.
[0029]
An inclined nozzle 35 is provided at the center of the bottom member 33 and connected to a negative pressure source (not shown). When negative pressure is applied to the negative pressure chamber 34, the valve 31 is provided inside the negative pressure chamber 34. The valve 31 is pulled down against the spring 36 that is always urged to push up.
[0030]
When the valve 31 is pulled down, the diaphragm 20 opens the opening of the first orifice passage 17 on the side of the secondary liquid chamber 21 so that the main liquid chamber 6 and the secondary liquid chamber 21 communicate with each other, and negative pressure is applied to the negative pressure chamber 34. When the valve 31 is pushed up by the spring 36, the diaphragm 20 covers the opening of the first orifice passage 17 and cuts off the communication.
[0031]
1 is an enlarged cross-sectional view of the valve assembly 30, FIG. 2 is a side view thereof, FIG. 3 is a bottom view, and FIG. 4 is an enlarged view of a part for explaining a joint structure between the elastic membrane portion 32 and the bottom member 33. It is sectional drawing.
[0032]
As shown in these drawings, a metal caulking ring member 40 is integrated by an insert on the thick part 37 formed on the outer peripheral part of the elastic film part 32, and the outer peripheral part 41 is supported. The ring 42 is bent on the outer peripheral portion 38 of the bottom member 33 with the ring 42 sandwiched inside, and the outer peripheral portions 37 and 38 are joined and integrated with each other by caulking.
[0033]
In addition, the valve 31 and the elastic membrane part 32 are integrated to form a substantially cup shape as a whole, and a deformation prevention plate 39 such as a metal plate is inserted on the valve 31 side which is the top, and the contact part of the valve 31 with respect to the diaphragm 20 Is not easily deformed, and is also a spring receiver for the spring 36.
[0034]
FIG. 5 shows the developed shape of the support ring 42. As is apparent from this figure, the support ring 42 is a strip-shaped metal member, and its width W is when the caulking ring member 40 is caulked. The distance L between the insert portion and the outer peripheral portion 41 (FIG. 4) is substantially the same, and the length L is wound around each outer peripheral end of the thick portion 37 of the elastic membrane portion 32 and the outer peripheral portion 38 of the bottom member 33. It is possible.
[0035]
FIG. 6 is a principle diagram for explaining how to use the support ring 42. FIG. 6 is a view showing the state before crimping from the direction of the arrow Y in FIG. The support ring 42 is roughly rounded and inserted, and the support ring 42 is disposed so as to wrap around the outer peripheral ends of the thick portion 37 of the elastic film portion 32 and the outer peripheral portion 38 of the bottom member 33.
[0036]
In this case, both longitudinal ends of the support ring 42 is not allowed to connect to each other, it is open as shown, and there is no need to close the respective outer peripheral end of the thick portion 37 and the bottom member 33 overall.
[0037]
As shown in FIG. 4, the support ring 42 is overlapped on the caulking ring member 40 before crimping, and the outer peripheral portion 41 side is bent by caulking toward the outer peripheral portion 38 of the bottom member 33. Since the portion 41 bends inward, the diameter of the support ring 42 is reduced (FIG. 6).
[0038]
When the support ring 42 does not reduce the diameter in close contact with the outer peripheral ends of the thick portion 37 and the bottom member 33, the outer peripheral portion 41 is bent sharply with the contact portion with the support ring 42 as a fulcrum.
[0039]
Therefore, the support ring 42 functions to provide a folding point of the outer peripheral portion 41 when the caulking ring member 40 is caulked, and enables the outer peripheral portion 41 to be bent sharply and accurately.
[0040]
In addition, the support ring 42 is a simple band plate-like member, and is not a process that requires special accuracy when rounded into a ring shape, but a manual process that allows considerable variation is sufficient. Compared with the effect obtained, the cost and the processing cost are remarkably low, and this type of processing cost can be greatly reduced.
[0041]
Reference numeral 50 in FIG. 7 denotes an attachment shaft on the engine side that protrudes from the first attachment fitting 1 along the center line C of the elastic member 3, and reference numeral 51 designates an attachment shaft that is rotatable around the attachment shaft 50. This is a rotating plate that is stopped by a pin 52.
[0042]
53 is a stopper protrusion formed on a part thereof, and 54 is a stopper metal that extends from a part of the intermediate cylindrical metal fitting 7 toward the first mounting metal 1 and restricts the upward movement amount of the stopper protrusion 53.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of a valve assembly. FIG. 2 is a side view of the valve assembly. FIG. 3 is a bottom view of the valve assembly. [Explanation of the support ring] [Fig. 6] Diagram explaining the principle of use of the support ring [Fig. 7] Full sectional view of the liquid seal mount [Explanation of symbols]
1: first mounting bracket, 2: second mounting bracket, 3: elastic member, 13: partition member, 20: diaphragm, 17: first orifice passage, 18: second orifice passage, 30: valve assembly, 40: ring member for caulking, 41: outer peripheral portion, 42: support ring

Claims (4)

Each of the two circular members used by facing each other is overlapped, and a metal caulking ring member disposed along each outer peripheral portion is folded into a substantially U-shaped cross section. In the caulking method for joining the outer periphery,
Before the caulking ring member is caulked, a belt-like support ring is rounded and arranged along the outer peripheral portion of the circular member with a gap provided at both ends in the longitudinal direction without being connected to each other. A caulking method characterized in that the caulking ring member is bent while reducing the diameter so that the support ring is wrapped inward.   2. The caulking method according to claim 1, wherein each of the two circular members is formed of a non-metallic material that is relatively easy to deform as compared with a metallic material.   The two circular members are configured to face each other to form a sealed space, and at least one of the circular members is formed of a soft elastic member such as rubber, and an outer peripheral portion of the soft elastic member The caulking ring member is integrated with the inner peripheral side, and the outer peripheral side of the caulking ring member is wrapped around the outer peripheral portion of the other circular member, so that the joint portion of the two circular members is joined at the caulking portion. 3. The caulking method according to claim 2, wherein the sealing is fluid-tight.   The two circular members are an elastic membrane and a resin bottom member that constitute a valve assembly for opening and closing the orifice passage in the vibration isolator having an openable and closable orifice passage, and between the elastic membrane and the bottom member. 4. The caulking method according to claim 3, wherein a negative pressure chamber is formed in the first and second chambers.

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