JPH023068B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is a method for manufacturing a damper for damping torsional vibrations applied to a rotating shaft such as a crankshaft, camshaft, or drive shaft of an internal combustion engine to prevent accidents such as breakage of the rotating shaft. It is related to.

In recent years, what is called a viscous rubber damper has come into use as the above-mentioned damper. An example of the conventional product will be explained with reference to FIG. In FIG. 1, an inertial mass body 1 having an annular shape as a whole is constituted by a pair of annular divided pieces 1A and 1B arranged in the axial direction. Each of these divided pieces 1A, 1B is
Small-space opposing surfaces 2A, 2 that face each other in a direction parallel to the axial direction with a small space and are continuous in the circumferential direction.
B, and a large-interval opposing surface 3A that faces with an interval larger than the above-mentioned interval at a position inside the small-interval opposing surfaces 2A and 2B and continues in the circumferential direction,
3B, and a concave portion facing inward in the radial direction is formed between the two divided pieces 1A and 1B by these opposing surfaces. And these divided pieces 1
A substantially disc-shaped mounting plate 4 is inserted into the recess between A and 1B, that is, between the opposing surfaces, and the outer peripheral end thereof is positioned with a gap between the small-spaced opposing surfaces 2A and 2B. ing. Furthermore, each of the divided pieces 1A, 1B
Annular rubber bodies 5A, 5B are disposed coaxially with the divided pieces 1A, 1B between the large-space opposing surfaces 3A, 3B and the front and back surfaces of the mounting plate 4, respectively. bodies 5A, 5B and each large-spaced opposing surface 3
A, 3B and each surface of the mounting plate 4 are bonded together. The two divided pieces 1A, 1B are connected and fixed at their outer peripheries by means of fixing means such as "caulking" 6, and the small spaced opposing surfaces 2
A viscous fluid 7 such as silicone oil is filled in the gaps between A, 2B and each of the front and back surfaces of the mounting plate 4.

As mentioned above, in the viscous rubber damper, if the mounting plate 4 is fixed to the rotating shaft 8 such as a crankshaft, the initial resistance is The torsional vibration of the rubber damper is absorbed, and the secondary vibration caused by resonance of the rubber is absorbed by the shear resistance of the viscous fluid 7, thereby exhibiting much better torsional vibration damping characteristics compared to ordinary rubber dampers. It has been known.

By the way, in manufacturing the damper as described above, it is necessary to adhere the rubber bodies 5A, 5B to each surface of the mounting plate 4 and the large-spaced opposing surfaces 3A, 3B of each divided piece 1A, 1B. In this case, the adhesive part needs to have strong adhesive strength to withstand large repeated loads, so generally an isocyanate rubber mixed adhesive or the like is used to simultaneously vulcanize the rubber bodies 5A and 5B. It is usually vulcanized and bonded. Conventionally, the following two-step process has been adopted for vulcanizing and bonding the rubber bodies 5A and 5B. That is, first, as shown in FIG. 2A, the mounting plate 4 is positioned horizontally, and the upper and lower molds 9 and 10 are placed on both the upper and lower surfaces of the mounting plate 4, and uncured material is placed in the molds 9 and 10. Rubber fabrics 5a, 5b are placed in the rubber fabrics 5a, 5b, and an adhesive 11 is interposed between the rubber fabrics 5a, 5b and the surface of the mounting plate 4.
3, pressurize and heat it between rubber dough 5
At the same time as a and 5b are vulcanized, the adhesive 11 is vulcanized. FIG. 2B shows the state in which the first vulcanization adhesion has been completed in this manner. Next, as shown in FIG. 2C, an adhesive 14 is applied to the surfaces of the rubber bodies 5A and 5B.
Large interval opposing surfaces 3A of divided pieces 1A, 1B via
3B are brought into contact with each other, and in this state, pressure and heat are applied between the press base 12 and the press ram 13 to vulcanize the adhesive 14 and bond the rubber bodies 5A, 5B to the divided pieces 1A, 1B. In addition, in FIG. 2C, 15 and 16 are molds for maintaining the relative positional relationship between the divided pieces 1A and 1B and the mounting plate 4.

In this way, when manufacturing a conventional damper, vulcanization was performed twice to bond the rubber bodies 5A and 5B, which resulted in a large number of man-hours and high work costs. Ta. Furthermore, if we compare the first vulcanization bonding and the second vulcanization bonding, we find that during the first vulcanization bonding, the rubber fabrics 5a, 5
b and the mounting plate 4 are in direct contact with the molds 9 and 10, whereas during the second vulcanization bonding, the rubber bodies 5A,
Since the rubber bodies 5B do not come into direct contact with the molds 15, 16, the press ram 13, or the base 12, the heat received by the vulcanized adhesive parts tends to be small, and furthermore, the rubber bodies 5A, 5B themselves are Since they have already been vulcanized to some extent, the adhesive strength between the rubber bodies 5A, 5B and the divided pieces 1A, 1B obtained by the second vulcanization bond is the same as that of the mounting plate 4 and the rubber body 5A, which were obtained by the first vulcanization bond. There is a problem that the bonding strength is inferior compared to that with 5B.

This invention was made in view of the above circumstances, and it is possible to perform vulcanization bonding between a rubber body and a mounting plate and vulcanization bonding between a rubber body and an inertial mass body segment at the same time, thereby reducing work costs. It is an object of the present invention to provide a method for manufacturing a damper in which the bonding strength of both bonded portions is reduced and the bonding strength of both bonded portions is made the same.

That is, in the damper manufacturing method of the present invention, a pair of inertial mass body segments are connected by fitting a short cylindrical connecting cylinder on the outer circumferential side thereof, and at a stage before fitting the connecting cylinder, The gap between the narrowly spaced opposing surfaces of the inertial mass body segments and the plate surface of the mounting plate is opened to the outer circumferential side, and the pair of rubber bodies are connected to the large spaced opposing surfaces of each inertial mass body segmented piece. When adhering to each front and back of the mounting plate, one inertial mass body segment, the mounting plate, and the other inertial mass body segment are arranged coaxially in that order, and the small spaced opposing surfaces of each of the inertial mass body segments are arranged coaxially in that order. A partition member made of an elastic material is disposed along the stepped surface between the large-space opposing surface of the inertial mass body segment, the opposing surface of the mounting plate opposing the large-space opposing surface, and the partition member. Fill the annular continuous recess surrounded by the rubber fabric, heat and pressurize both inertial mass body segments from both sides, and apply the rubber fabric between the widely spaced opposing surfaces of the inertial mass body segments and the mounting plate. After vulcanization and adhesion to the board surface at the same time,
The present invention is characterized in that the partition member is pulled outward from a gap between a mounting plate and a small-spaced opposing surface of each inertial mass body segment.

The method of the present invention will be explained in more detail below with reference to the drawings from FIG. 3 onwards.

FIG. 3 shows the overall structure of a damper to be manufactured by the method of the present invention. In FIG. 3, the same elements as those shown in FIG. is omitted.

In FIG. 3, a pair of inertial mass body segments 1
A and 1B are made to have substantially symmetrical shapes with the mounting plate 4 as the center. That is, in the example shown in FIG. 1, the outer peripheral end of one inertial mass segment 1A is extended in the axial direction to surround the outer peripheral end of the mounting plate 4 and the outer peripheral surface of the other inertial mass segment 1B. However, in the damper shown in FIG. 3, each inertial mass segment 1A, 1B does not surround the outer peripheral end of the mounting plate 4. Step-shaped notches 20A, 20B are formed continuously in the circumferential direction at the corners of the outer circumferential surfaces of both inertial mass body segments 1A, 1B that are close to each other, and these notches 20A, 2
A notched annular C-shaped ring 21 surrounding the outer peripheral end of the mounting plate at intervals is fitted into 0B. Further, the outer peripheral surfaces of the inertial mass body division pieces 1A, 1B and C
A connecting tube 22 having a short cylindrical shape is fitted onto the outer peripheral surface of the mold ring 21 . Both axial ends of the connecting cylinder 22 are bent along the corners of the inertial mass body segments 1A, 1B, thereby connecting both the inertial mass body segments 1A, 1B. The bent portion of the connecting cylinder 22 and the inertial mass body segment 1
An O-ring 23 is inserted between the corners A and 1B. In addition, the small-space opposing surfaces 2A, 2B and the large-space opposing surfaces 3A, 3 of both inertial mass body division pieces 1A, 1B.
In the example of FIG. 1, the step surfaces 24A and 24B between the two opposing surfaces 24A and 24B are formed at right angles to the opposing surfaces 2A and 2B in the example of FIG.
A, 2B; It is a slope that smoothly continues from 3A, 3B. In addition, in FIG. 3, 25 is a rubber fabric escape path as described later.

Next, a method for manufacturing the damper shown in FIG. 3 will be described with reference to FIGS. 4 to 7.

First, as shown in FIG. 4, a pair of inertial mass body segments 1A and 1B, which have been previously machined into a predetermined shape, and the mounting plate 4 are placed at a predetermined position between the lower mold 26 and the upper mold 27. That is, the lower mold 26, the inertial mass segment 1B, the mounting plate 4, the inertial mass segment 1A, and the upper mold 27 are stacked in that order from below. Here, each inertial mass body segment 1A, 1B
small-space opposing surfaces 2A, 2B and large-space opposing surfaces 3A,
A partition member 28 is disposed on the stepped surfaces 24A and 24B between the two. This partition member 28 is made of an elastic material such as rubber or synthetic resin, and is preliminarily formed on the step surface 24 as shown in detail in FIG.
A, 24B, the cross section is formed to have a smooth inclined shape, and the whole is made to form a notched ring shape, and a drawer handle 28A is integrally formed at one end thereof. This drawer handle part 28A is the inertial mass body divided piece 1A, 1B.
is extended to the outside through a gap between the mounting plate 4 and the opposing surfaces 2A, 2B at a small interval. Small-spaced opposing surfaces 2A, 2B of inertial mass body division pieces 1A, 1B and mounting plate 4
The drawer handle portion 28
A pair of substantially semi-annular presser plates 29 are inserted in a portion other than the portion occupied by A so as to form an annular shape as a whole. This presser plate 29 is for preventing the partition member 28 from slipping out to the outside, and its inner peripheral edge is in contact with the outer peripheral edge of the partition member 28, and its outer peripheral edge is connected to the inertial mass body segment 1.
It is arranged so as to extend outward from the outer peripheral ends of A and 1B. FIG. 6 shows a planar arrangement relationship between the partition member 28 and the presser plate 29. As shown in FIG.

As described above, the partition member 28 and the presser plate 2
9 is placed in a predetermined position, rubber is inserted into the annular continuous recess 30 formed by the large-space opposing surfaces 3A, 3B of each inertial mass body segment 1A, 1B, the partition member 28, and the plate surface of the mounting plate 4. Fill with dough 5a and 5b. That is, as shown in FIG.
7 and the lower mold 26, respectively, are charged with unvulcanized rubber dough 5a, 5b, and the vulcanization press upper ram 32 is directed toward the vulcanization press base 33. By lowering the rubber dough holder 31, the piston 33 presses the rubber dough 5a, 5b in the rubber dough holder 31, and the rubber dough holder 31 is moved from the rubber dough holder 31 to the recess 3 into the upper mold 27 and the lower mold 26.
The rubber fabrics 5a and 5b are filled into the recess 30 through the rubber fabric insertion path 35, which is formed so as to be continuous with the rubber fabric insertion path 35. Note that the surfaces of the large-spaced opposing surfaces 3A and 3B of the inertial mass body division pieces 1A and 1B in this recess 30 and the plate surface of the mounting plate 4 are coated with a vulcanized isocyanate rubber mixed adhesive in advance before filling the rubber dough. Apply adhesive 36. Furthermore, the surplus of the rubber dough 5a, 5b filled in the recess 30 escapes to the surplus rubber retainer 37 via the rubber dough escape path 25 formed in advance in the inertial mass body division pieces 1A, 1B.

After the rubber fabrics 5a, 5b are filled in the recess 30, the pressure between the upper ram 32 and the base 33 is continued, and the rubber fabrics 5a, 5b in the recess 30 are heated by the upper ram 32 and base 33,
At the same time as the rubber fabrics 5a and 5b are vulcanized, the adhesive 36 is vulcanized, thereby vulcanizing and adhering the rubber. In this way, the inertial mass body segment 1A,
After the rubber bodies 5A, 5B are vulcanized and bonded between the large-spaced opposing surfaces 3A, 3B of 1B and the mounting plate 4, the upper ram 32 is raised and the upper mold 27 and lower mold 26 are removed. The state is shown in FIG. 7A.

Next, after pulling out the presser plate 29 to the outside, the drawer handle portion 28A of the partition member 28 is pulled outward. Since the partition member 28 is made of an elastic material, it is easily elastically deformed and pulled out through the gap between the small spaced opposing surfaces 2A, 2B and the plate surface of the mounting plate 4. In order to facilitate this pulling out, the rubber bodies 5A, 5B are stretched by pulling the inertial mass body segments 1A, 1B apart from each other. It is desirable to enlarge the gap between the plate and the plate surface. FIG. 7B shows a state in which the presser plate 29 and the partition member 28 are pulled out in this manner.

Next, as shown in FIG.
After fitting the C-shaped ring 21 to B and butt-welding both ends thereof, the connecting cylinder 22 is fitted so as to surround the outer circumferential surfaces of both inertial mass body division pieces 1A and 1B and the outer circumferential surface of the C-shaped ring 21. and placing the O-ring 23 in a predetermined position, both edges 22A, 2 of the connecting cylinder 22
Fold 2B inward. As a result, both the inertial mass body segments 1A, 1B are connected and fixed, and the gap between the mounting plate 4 and the narrowly spaced opposing surfaces 2A, 2B of the inertial mass body segments 1A, 1B is closed. Thereafter, the gap is filled with silicone oil through a silicone oil filling hole (not shown) formed in the inertial mass segment 1A or 1B, thereby completing the damper shown in FIG. 3.

In the above description, the partition member 28 is for preventing the rubber bodies 5A, 5B from being vulcanized and bonded to the stepped surfaces 24A, 24B of the inertial mass body division pieces 1A, 1B, and from contacting them. When the rubber fabric is filled and vulcanized (pressurized and heated) without using the partition member 28, the rubber body 5A,
5B is adhered to the stepped surfaces 24A, 24B, or at least comes into contact with them in a pressed state, and as a result, the effective distance of the rubber bodies 5A, 5B between the mounting plate 4 and the inertial mass body division pieces 1A, 1B is extremely large. As a result, the torsional vibration damping effect provided by the rubber bodies 5A and 5B is no longer sufficient. Therefore, in this invention, it is necessary to interpose the partition member 28.

In the above example, the inertial mass segment 1A, 1
Although the C-shaped ring 21 for closing the outer circumferential side of the gap between the small-spaced opposing surfaces 2A and 2B of B and the connecting cylinder 22 that connects both the inertial mass body division pieces 1A and 1B are constructed separately, In some cases, both may be integrally formed as shown in FIG. That is, the connecting cylinder 22 in FIG.
It is formed by externally fitting a member 39 having a protrusion 38 to be fitted into the inertial mass body division pieces A and 1B, and welding both ends of the member 39.

Further, the partition member 28 may be constructed by spirally winding a wire rod 40 having a rectangular cross section and made of an elastic material such as metal or synthetic resin, as shown in FIG. In this case, as shown in FIG. 10, one end of the spiral wire 40 is pulled out to the outer circumferential side and becomes a drawer handle 28A. In this case, the 10th
As shown in the figure, it is possible to make the stepped surfaces 24A, 24B perpendicular to the small-space opposing surfaces 2A, 2B, but it is of course possible to make them sloped surfaces as in the case of FIG. 4. . Although the presser plate 29 is not shown in FIG. 10, the presser plate 29 is normally provided in the same manner as described above. However, depending on the case, the presser plate 29 may be omitted.

In the above description, the rubber fabrics 5a, 5b are filled into the annular continuous recess 30 using a vulcanization press, but in some cases, a predetermined amount of the rubber fabrics 5a, 5b may be filled as shown in FIG. Pre-annular continuous recess 3
0, and from this state pressure and heating may be applied between the upper ram 32 and the base 33.
In this case, it is not necessary to provide the molds 26 and 27 with a rubber dough retainer or a rubber dough inflow path, and therefore the mold cost is reduced. In this case, it goes without saying that a vulcanized adhesive such as isocyanate rubber adhesive should be interposed between the rubber fabrics 5a and 5b and the surface of the mounting plate 4 and the large-space opposing surfaces 3A and 3B. be.

Furthermore, in each of the above examples, the rubber fabric escape path 25 is formed in each inertial mass body segment 1A, 1B, but the partition member 28 and the presser plate 29 are formed with a portion corresponding to the rubber fabric escape path. By doing so, it is also possible to omit the rubber fabric escape path 25 from the inertial mass body division pieces 1A, 1B.

As is clear from the above explanation, according to the torsional vibration prevention damper manufacturing method of the present invention, when manufacturing a Vizcarra rubber damper, vulcanization adhesion between the rubber body and the mounting plate, and the inertia mass between the rubber body and the inertial mass are performed. Because the vulcanization bonding with the body segment is done at the same time, the number of steps is reduced and the damper manufacturing cost is much lower than before, and there is no difference in thermal effects between the two bonded parts, and the rubber body itself is vulcanized. Since there is no difference in the effects of , various effects can be obtained, such as the bonding strength of both bonded parts being the same.

[Brief explanation of drawings]

FIG. 1 is a vertical sectional view showing an example of a conventional torsional vibration prevention damper, and FIGS. 2A to 2C are schematic diagrams showing step-by-step an example of the conventional damper manufacturing method shown in FIG. 1, particularly the rubber body bonding process. 3 is a longitudinal sectional view showing an example of a torsional vibration prevention damper manufactured by the manufacturing method of the present invention, and FIG. 4 is a longitudinal sectional view of the damper shown in FIG. 3 manufactured by the method of the present invention. FIG. 5 is a schematic cross-sectional view showing an example of a situation in which the rubber fabric is filled and vulcanized and bonded during manufacturing; FIG. 5 is a perspective view showing an example of a partition member used in carrying out the method of the present invention; Fig. 6 is a plan view showing the arrangement relationship between the partition member and the presser plate shown in Fig. 5, and Figs. 8 is a longitudinal sectional view showing another example of a torsional vibration prevention damper manufactured by the method of the present invention, and FIG. 10 is a schematic sectional view showing a situation in which the method of the present invention is carried out using the partition member shown in FIG. 9, and FIG. 11 is another example of the method of the present invention. FIG. 2 is a schematic cross-sectional view showing a situation in which the 1A, 1B... Inertial mass body segment, 2A, 2B
...Small spacing opposing surfaces, 3A, 3B...Large spacing opposing surfaces, 4...Mounting plate, 5a, 5b...Rubber fabric, 5
A, 5B...Rubber fabric, 7...Viscous fluid, 22...
...Connecting tube, 24A, 24B...Step surface, 28...
Partition member, 36...vulcanized adhesive.

Claims (1)

[Scope of Claims] 1. A pair of inertial mass body segments having an annular shape as a whole and arranged coaxially in the axial direction, wherein both of the inertial mass body segments are parallel to the axial direction with a small interval between them. small-space opposing surfaces facing each other in the direction and continuous in the circumferential direction; and large spaces facing each other with a distance larger than the above-mentioned space at a position radially inner than the small-space opposing surfaces and continuous in the circumferential direction. A substantially disc-shaped mounting plate is inserted between the inertial mass body division pieces, and the outer circumferential end thereof is located at a distance between the small-spaced opposing surfaces, and An annular rubber body is disposed coaxially with the inertial mass segment between the widely spaced opposing surfaces of each inertial mass segment and each of the front and back surfaces of the mounting plate, and The rubber bodies are adhered to both sides of the large-spaced opposing surface and the plate surface of the mounting plate, respectively,
Further, a substantially short cylindrical connecting tube is fitted to the outer circumferential surface of both of the inertial mass body segments, and a connecting cylinder having a substantially short cylindrical shape that connects these pieces to each other is fitted, and the outer circumferential end of the mounting plate is connected to the opposing face of the inertial mass body segment at a small distance. In the method for manufacturing a torsional vibration prevention damper in which a gap between the inertial mass body parts is filled with a viscous fluid, the rubber body is adhered to the large-spaced opposing surfaces of each of the inertial mass body division pieces and to each of the front and back surfaces of the mounting plate. Hits the,
One inertial mass body segment, the mounting plate, and the other inertial mass body segment are arranged coaxially in that order, and there is a step difference between the small-space opposing surface and the large-space opposing surface of each of the inertial mass body segments. A partition member made of an elastic material is arranged along the surface, and the annular continuous recess is surrounded by the large-spaced opposing surfaces of the inertial mass body segments, the plate surface of the mounting plate opposing this, and the partition member. After filling the rubber fabric and applying heat and pressure to both inertial mass segment pieces from both sides, the rubber fabric is simultaneously vulcanized and bonded to the widely spaced opposing surfaces of the inertial mass segment segments and the plate surface of the mounting plate. A method for manufacturing a torsional vibration prevention damper, characterized in that a partition member is pulled out from a gap between a mounting plate and a small-spaced opposing surface of each inertial mass body segment.