JP2006069233A - Manufacturing method of stabilizer bar with rubber bush - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method of manufacturing a stabilizer bar with a rubber bush which can firmly fix the rubber bush to a stabilizer bar and is excellent in durability. <P>SOLUTION: The manufacturing method is composed of a first process vulcanizing and molding the rubber bush 3, a second process which applies the thermosetting adhesive to a fitted part 2 and externally fits the rubber bush 3 into the fitted part 2, a third process which externally fits a first fitting recessed part of a first pressing tool into a projecting curved surface 12 and externally fits a second fitting recessed part of a second pressing tool into a pair of straight through surfaces 15 and a planiform outer peripheral surface 5, and a fourth process which heats the rubber bush 3 in a state holding the rubber bush 3 by pressure and adheres to the fitted part 2. The projecting part 53 compressed by a clamping fitting is formed on the pair of straight line surfaces 15 of the rubber bush 3 by evaginating in a recessed part formed on both sides of the second fitting recessed part in the fourth process. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

The present invention relates to a method of manufacturing a stabilizer bar with a rubber bush that externally fixes a cylindrical rubber bush having a U-shaped outer peripheral surface that fits inside a clamp fitting to a fitted portion of the stabilizer bar.

  Conventionally, this type of stabilizer bar with a rubber bush has a structure in which the stabilizer bar is simply inserted into the rubber bush. Then, the rubber bush is pressed and fixed to the vehicle body side with a clamp fitting provided with a U-shaped rubber bush receiver, and the flat outer peripheral surface of the rubber bush is pressed against the mounting surface of the vehicle body.

  According to the conventional structure described above, the stabilizer bar was simply inserted through the rubber bush, so when water entered between the rubber bush and the stabilizer bar or when the air temperature became very low. In addition, there is a problem that the rubber bush slips with respect to the stabilizer bar and abnormal noise is generated.

In order to solve this problem, as disclosed in the first technique of vulcanizing and bonding a rubber bush to a stabilizer bar, or as disclosed in Patent Document 1, the rubber bush formed by vulcanization is bonded to a stabilizer bar at room temperature with an adhesive. There is a second technique to stick. In both technologies, the rubber bushing is externally fixed to the stabilizer bar to suppress the slippage between the two to prevent the generation of abnormal noise.
JP 11-108096 A

  According to said 1st technique, although generation | occurrence | production of abnormal noise can be prevented, since the stabilizer bar is long, the production equipment of vulcanization adhesion becomes large, equipment cost increases, and productivity is increased. Is difficult and the production cost is high. In the second technique, the adhesive force of the adhesive is reduced in a high temperature atmosphere, and the inner peripheral surface of the rubber bush may be separated from the outer peripheral surface of the stabilizer bar.

  An object of the present invention is to provide a method capable of manufacturing a stabilizer bar with a rubber bush that has a structure capable of preventing abnormal noise, can reduce the manufacturing cost, and can firmly fix the rubber bush to the stabilizer bar and has excellent durability. There is in point to do.

A feature of the present invention is a method for manufacturing a stabilizer bar with a rubber bush for externally fixing and fixing a cylindrical rubber bush having a U-shaped outer peripheral surface fitted into a clamp fitting to a fitted portion of the stabilizer bar. ,
A first step of vulcanizing the rubber bush;
A second step of applying a thermosetting adhesive to the fitted portion of the stabilizer bar and / or the inner peripheral surface of the hollow hole of the rubber bush, and externally fitting the rubber bush to the fitted portion; ,
The first fitting recess of the first pressing tool is externally fitted to the projecting curved surface of the U-shaped outer peripheral surface of the rubber bush, and a pair of linear surfaces of the U-shaped outer peripheral surface; A third step of externally fitting the second fitting recess of the second pressing tool to the flat outer peripheral surface of the rubber bush connecting the edges of the pair of linear surfaces;
A fourth step of heating and bonding the rubber bush to the fitted portion in a state where the rubber bush is clamped by the first pressing tool and the second pressing tool,
In the fourth step, a part of the rubber bush is bulged into one or more concave portions formed on both side surfaces of the second fitting concave portion, so that the pair of linear surfaces of the rubber bush are formed. The method is to form convex portions compressed by the clamp fitting.

  According to this means, the rubber bush is heated with the rubber bush compressed by pressing the rubber bush with the first pressing tool and the second pressing tool, so that the thermosetting adhesive is cured and the rubber bush becomes Firmly adheres to the stabilizer bar. Since the adhesive is thermosetting, the adhesive strength does not decrease in a high temperature atmosphere. As a result, the rubber bush does not slip with respect to the stabilizer bar, and the generation of abnormal noise can be prevented. Also, since the rubber bushing is vulcanized separately from the stabilizer bar, the production equipment for vulcanization molding does not increase in size, increasing productivity and reducing manufacturing costs. can do.

  For example, if the clamp fitting fitted to the U-shaped outer peripheral surface of the rubber bush is easy to come off from the rubber bush, when the bolt is attached to the mounting part of the clamp fitting from below, There is a problem that the metal fitting must be held so as not to fall off from the rubber bush, which makes it difficult to screw the bolt. On the other hand, according to the above configuration of the present invention, in the fourth step, a part of the rubber bush is bulged into one or more recesses formed on both side surfaces of the second fitting recess, so that the rubber Since the convex portions compressed by the clamp fittings are formed on the pair of linear surfaces of the bush, the above-described problem can be solved. In other words, when the clamp fitting is externally fitted to the U-shaped outer peripheral surface of the rubber bush, the clamp fitting becomes difficult to come off from the rubber bush, and when the bolt is attached to the mounting portion of the clamp fitting from below, the operator It is not necessary to pay attention to the drop-off of the clamp fitting, and it is easy to perform the screwing operation of the bolt.

  In the present invention, in the first step, the curved portion of the rubber bush whose outer peripheral surface is the projecting curved surface is in a state where a set amount bulges outward in the radial direction from the target product dimension. When vulcanized, the following effect (A) can be obtained.

  (A) When the rubber bush is clamped and heated by the first pressing tool and the second pressing tool and the sag due to heat is generated in the projecting portion, the first pressing tool and the second pressing tool against the rubber bush There is a possibility that the adhesive force between the rubber bush and the stabilizer bar may be weakened due to weak clamping pressure. When the rubber bush is pressed and fixed to the vehicle body side with clamp metal fittings after the product is completed, it is difficult to press the flat outer peripheral surface of the rubber bush against the mounting surface of the vehicle body with a desired force, and the fixed state to the vehicle body is unstable. become. On the other hand, according to the above-described configuration of the present invention, the curved portion of the rubber bush bulges a set amount outward in the radial direction from the target product dimension. The compressive force can be reliably transmitted to the rubber bush by the tool, and the problem that the adhesive force between the rubber bush and the stabilizer bar becomes weak can be avoided. And even if a sag caused by heat occurs in the bent part, the bent part can be easily formed according to the product dimensions. As a result, when the rubber bush is pressed and fixed to the vehicle body with clamp fittings after the product is completed, the flat outer peripheral surface of the rubber bush can be pressed against the mounting surface of the vehicle with a desired force, and the fixed state to the vehicle is stable. Can be Since the dimension of the rubber bush in the width direction (direction intersecting with a pair of linear surfaces of the U-shaped outer peripheral surface) is not in the bulged state as described above, The rubber bush can be smoothly fitted into the second fitting recess, and a problem that the fitting cannot be performed can be avoided.

  According to the present invention, the manufacturing cost can be reduced while the structure can prevent abnormal noise, and the rubber bush can be firmly fixed to the stabilizer bar and has excellent durability. It was possible to provide a method capable of manufacturing a stabilizer bar with a rubber bush that can improve workability.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows a stabilizer bar with a rubber bush attached to a suspension of an automobile and a member on the vehicle body side. This stabilizer bar with rubber bush is composed of a metal bar-like stabilizer bar 1 whose surface is coated, and a rubber bush 3 which is externally fitted and fixed to the fitted portion 2 of the stabilizer bar 1.

  The rubber bush 3 includes a U-shaped outer peripheral surface 4 fitted into the U-shaped rubber bush receiver 9 of the clamp fitting 8, and a linear flat outer peripheral surface 5 continuous to both ends of the U-shaped outer peripheral surface 4. The flanges 6 are respectively formed at both ends of the rubber bush 3 in the axial direction. The rubber bush 3 is formed with a cutting portion 7 for mounting along the radial direction and the axial direction.

  The rubber bush 3 is pressed and fixed to the vehicle body side by the clamp fitting 8, and the flat outer peripheral surface 5 of the rubber bush 3 is brought into pressure contact with the mounting surface of the vehicle body. The clamp fitting 8 includes a U-shaped rubber bush receiver 9 that slightly fits the U-shaped outer peripheral surface 4 between the flanges 6 of the rubber bush 3 and a lateral opening from both open ends of the rubber bush receiver 9. It comprises an attachment piece 10 as an attachment portion extending outward, and a bolt insertion hole 11 is formed in the attachment piece 10.

  The manufacturing method of the stabilizer bar with the rubber bush includes the following first to fourth steps.

[First step]
The rubber bush 3 is vulcanized (see FIGS. 8 (a) and 8 (b)), and the outer peripheral surface of the stabilizer bar 1 is coated by cationic electrodeposition coating or powder coating.

[Second step]
Apply a thermosetting epoxy adhesive (an example of a thermosetting adhesive) to the coating film surface of the mated portion 2 of the stabilizer bar 1 (and / or the inner peripheral surface 38C of the hollow hole 38 of the rubber bush 3). Then, the cut portion 7 formed in the rubber bush 3 is opened, and the rubber bush 3 is externally fitted to the fitted portion 2.

[Third step]
As shown in FIG. 6, the first fitting recess 14 of the first pressing tool 13 is fitted on the protruding surface 12 of the U-shaped outer circumferential surface 4 of the rubber bush 3, and the U-shaped outer circumferential surface 4. Of the second pressing tool 16 to the pair of linear surfaces 15 and the flat outer peripheral surface 5, that is, the flat outer peripheral surface 5 of the rubber bush 3 connecting the edges of the pair of linear surfaces 15. 2 The fitting recess 17 is externally fitted.

[Fourth step]
As shown in FIG. 7, the rubber bush 3 is heated by pressing the rubber bush 3 with the first pressing tool 13 and the second pressing tool 16 to compress the rubber bush 3 by 5% to 10%. 13 and the 2nd pressing tool 16 are removed, and the stabilizer bar with a rubber bush is obtained. The heating temperature for the rubber bush 3 is 120 ° C. to 200 ° C., and the heating time is 15 minutes to 60 minutes.

  More specifically, in the first step, as shown in FIGS. 8 (a) and 8 (b), the projecting portion 37 of the rubber bush 3 whose outer peripheral surface is composed of the projecting curved surface 12 is the target product size. The rubber bush 3 is vulcanized and molded so as to bulge a set amount outward in the radial direction from the (curved portion). In FIG. 8B, the alternate long and short dash line A represents the projecting curved surface of the projecting portion 37 of the product size. The projecting curved surface 12 before heating is a gentle arc-shaped curved surface corresponding to the projecting curved surface A of the projecting portion 37 of the product size. Since the rubber bush 3 thus vulcanized and molded is heated in a state in which it is sandwiched between the first pressing tool 13 and the second pressing tool 16, even if the bent portion 37 is sag (shrinkage) due to heat, the bent It becomes easy to form the part 37 according to the product dimensions. The set amount is an amount that takes into account the sag of the projecting portion 37, and is an amount that contracts due to the sag. The center of the hollow hole 38 of the rubber bush 3 is located slightly closer to the corner block portion 26 side than the boundary between the protruding portion 37 and the corner block portion 26 described later.

  As shown in FIGS. 2, 3, and 4, the first pressing tool 13 includes a first accommodating portion 18 having a U-shaped cross section that accommodates a protruding portion 37 (see FIG. 8) of the rubber bush 3, and the first pressing portion 13. It consists of a pair of first mounting plates 19 projecting laterally outward from both open ends of the accommodating portion 18. The first fitting recess 14 is formed in the first accommodating portion 18. The first fitting recess 14 is tightly fitted on the protruding surface 12. A pair of flange receivers 20 for accommodating the pair of flanges 6 of the rubber bush 3 separately are formed in the first fitting recess 14. Then, a pair of through holes 21 are formed in the first mounting plate 19, and a pair of first side walls 23 that cover both end surfaces 22 in the axial direction of the bent portion 17 are formed at both end portions in the axial direction of the first pressing tool 13. Each of the first side walls 23 is formed with a semicircular recess 25 for receiving the stabilizer bar 1.

  As shown in FIGS. 2, 3, and 5, the second pressing tool 16 includes a corner block portion 26 of the rubber bush 3 (see FIG. 8. The outer peripheral surface is the flat outer peripheral surface 5 and the U-shaped outer peripheral surface 4. And a pair of protrusions projecting laterally outward from the open ends of the second storage portion 28. The second mounting plate 29. The second fitting recess 17 is formed in the second housing portion 28. The second fitting recess 17 is tightly fitted around the flat outer peripheral surface 5 and a pair of linear surfaces 15 of the U-shaped outer peripheral surface 4. In addition, a pair of pins 30 that respectively enter the pair of through holes 21 of the first mounting plate 19 protrude from the second mounting plate 29. A pair of second side walls 32 that cover both end surfaces 31 in the axial direction of the square block portion 26 are respectively formed at both end portions in the axial direction of the second pressing tool 16, and the stabilizer bar 1 is attached to the second side wall 32. A receiving semicircular recess 33 is formed. The end surface 31 of the corner block portion 26 is connected to the end surface 22 of the projecting portion 37 without a step. A plurality of recesses 52 are formed on both side surfaces 51 of the second fitting recess 17 where the pair of linear surfaces 15 of the rubber bush 3 are in contact with each other. The recess 52 is configured as a rectangular groove along the clamping direction of the first pressing tool 13 and the second pressing tool 16 (that is, long in the clamping direction).

As shown in FIG. 7, the pair of pins 30 of the second pressing tool 16 are passed through the pair of first pressing tools 13 in a state where the rubber bush 3 is clamped by the first mounting bracket 13 and the second pressing tool 16. It enters into each hole 21 separately. Then, almost the entire surface of the rubber bush 3 is covered with the first fitting recess 14 and the second fitting recess 17. In the fourth step, a part of the rubber bush 3 is bulged into the recesses 52 on both side surfaces 51 of the second fitting recess 17, so that the clamp metal fittings are formed on the pair of linear surfaces 15 of the rubber bush 3. A pair of convex portions 53 to be compressed by 8 are formed (FIG. 13).
[Another embodiment]

  (1) As shown in FIGS. 9 (a) and 9 (b), a plurality of (three in this embodiment) bent portions 37A, 37B, and 37C are provided in the circumferential direction on the rubber bush 3. The rubber bush 3 is vulcanized and molded so that the bent portion 37B located in the center in the circumferential direction is in a state of bulging a predetermined amount radially outward from the target product dimension. Also good.

  (2) As shown in FIGS. 10 (a) and 10 (b), a plurality of (three in this embodiment) bent portions 37A, 37B, and 37C are provided in the circumferential direction on the rubber bush 3. The curved portions 37A and 37C other than the curved portion 37B located in the center in the circumferential direction are in a state where a set amount bulges radially outward from the target product dimension. The rubber bush 3 may be vulcanized.

According to this configuration, the following action (B) can be achieved.
(B) When the rubber bush is clamped by the first pressing tool and the second pressing tool, the clamping pressure in the direction inclined with respect to the clamping direction (direction in which each protruding portion swells) is increased. It is easy to equalize the adhesive force between the rubber bush and the stabilizer bar in the circumferential direction, and the adhesiveness between the two can be improved.

  (3) As shown in FIGS. 11 (a) and 11 (b), a rubber bush portion 39 (on the corner block portion 26) on the opposite side of the projecting portion 37 with the hollow hole 38 of the rubber bush 3 interposed therebetween. A rubber bush is formed such that a metal or resin insert material 40 is embedded in a part) and the first surface 41 of the insert material 40 facing the hollow hole 38 is an arcuate curved surface along the circumferential direction of the hollow hole 38. 3 may be vulcanized. The second surface 42 of the insert 40 facing away from the hollow hole 38 protrudes from the rubber bush portion 39 and is exposed. The length C of the insert member 40 in the direction along the width direction of the rubber bush 3 is set longer than the diameter of the hollow hole 38, and the length D of the insert member 40 in the axial direction of the rubber bush 3 is both flanges of the rubber bush 3. The length between the first surface 41 of the insert material 40 and the inner peripheral surface of the hollow hole 38 is set to be substantially the same as the length between the first pressure tool 13 and the second pressure tool 16. The length between the protruding surface 12 of the rubber bush 3 and the inner peripheral surface of the hollow hole 38 is set to be substantially the same.

According to this configuration,
(C) When the rubber bush 3 is clamped by the first pressing tool 13 and the second pressing tool 16, the first pressing tool 13 and the insert material 40 compress the rubber bush portion therebetween. In this case, both end portions of the arcuate curved surface in the circumferential direction receive the rubber bush portion and prevent the rubber bush portion from bulging outward in the width direction of the rubber bush 3. Thereby, it can suppress that the compression force added to a rubber bush part escapes. And the 1st surface 41 of the insert material 40 which faces the hollow hole 38 side becomes the circular-arc-shaped curved surface along the circumferential direction of the hollow hole 38, and is pinched | interposed by the 1st press tool 13 and the 2nd press tool 16. Pressure is applied to the rubber bush portion as a force in a direction perpendicular to the curved surface. As a result, the pressure contact force between the rubber bush 3 and the stabilizer bar 1 can be easily uniformed in the circumferential direction of the both, and the adhesive force of both can be easily uniformed in the circumferential direction of both to improve the adhesion between the two. can do. Further, when the rubber bush 3 is pressed and fixed to the vehicle body side with the clamp fitting 8 having the U-shaped rubber bush receiver 9, and the flat outer peripheral surface 5 of the rubber bush 3 is pressed against the mounting surface of the vehicle body, the clamp The metal fitting 8 and the insert material 40 compress the rubber bush portion between them. In this case, both end portions of the arcuate curved surface in the circumferential direction receive the rubber bush portion and prevent the rubber bush portion from bulging outward in the width direction of the rubber bush 3. Thereby, it is possible to suppress the escape of the compression force applied to the rubber bush portion, the rubber bush 3 can be pressed against the mounting surface of the vehicle body with a desired force, and the fixed state with respect to the vehicle body can be stabilized. . Further, the rubber bush 3 is vulcanized and molded so that the length C of the insert material 40 in the direction along the width direction of the rubber bush 3 is longer than the diameter of the hollow hole 38, so that the arcuate curved surface is formed. Both end portions in the circumferential direction can easily receive the rubber bush portion, and the rubber bush portion can be more easily prevented from bulging outward in the width direction of the rubber bush 3.

  (4) As shown in FIG. 12, only the central portion of the projecting portion 37 in the axial direction of the rubber bush 3 is in a state of bulging by a set amount radially outward from the target product dimension. The rubber bush 3 may be vulcanized.

  (5) The numerical value given in the above embodiment is an example, and may be another numerical value. For example, the protruding portion 37 of the rubber bush 3 may be divided into four or more in the circumferential direction.

  (6) The shape and number of the recesses 52 are not limited to the shape and number of the above-described embodiment.

Perspective view of stabilizer bar and clamp with rubber bush Front view of first pressing tool and second pressing tool Side view of first pressing tool and second pressing tool Top view of the first pressing tool Bottom view of the second pressing tool The figure which shows the state which fits a rubber bush to a 1st press tool and a 2nd press tool. The figure which shows the state which clamped the rubber bush with the 1st press tool and the 2nd press tool. (A) is a side view of the rubber bush, (b) is a front view of the rubber bush. (A) is a side view of the rubber bush of the second embodiment, (b) is a front view of the rubber bush of the second embodiment. (A) is a side view of the rubber bush of the third embodiment, (b) is a front view of the rubber bush of the third embodiment. (A) is a side view of the rubber bush of the fourth embodiment, (b) is a front view of the rubber bush of the fourth embodiment. (A) is a side view of the rubber bush of the fifth embodiment, (b) is a front view of the rubber bush of the fifth embodiment. (A) is a side view showing a state in which the rubber bush of the first embodiment is bonded to a stabilizer bar, and (b) is a front view showing a state in which the rubber bush of the first embodiment is bonded to a stabilizer bar.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Stabilizer bar, 2 ... Fit part, 3 ... Rubber bush, 4 ... U-shaped outer peripheral surface, 5 ... Flat outer peripheral surface, 8 ... Clamp metal fittings, 12 ... U-shaped Projected curved surface of outer peripheral surface, 13... First pressing tool, 14... First fitting recess, 15... Pair of linear surfaces of U-shaped outer peripheral surface, 16. 17 …… second fitting recess, 37 …… curved portion, 38 …… hollow hole, 38C …… inner peripheral surface of hollow hole, 51 …… side surface, 52 …… concave, 53 …… convex

Claims (2)

A method of manufacturing a stabilizer bar with a rubber bush for externally fixing and fixing a cylindrical rubber bush having a U-shaped outer peripheral surface fitted into a clamp fitting to a fitting portion of the stabilizer bar,
A first step of vulcanizing the rubber bush;
A second step of applying a thermosetting adhesive to the fitted portion of the stabilizer bar and / or the inner peripheral surface of the hollow hole of the rubber bush, and externally fitting the rubber bush to the fitted portion; ,
The first fitting recess of the first pressing tool is externally fitted to the projecting curved surface of the U-shaped outer peripheral surface of the rubber bush, and a pair of linear surfaces of the U-shaped outer peripheral surface; A third step of externally fitting the second fitting recess of the second pressing tool to the flat outer peripheral surface of the rubber bush connecting the edges of the pair of linear surfaces;
A fourth step of heating and bonding the rubber bush to the fitted portion in a state where the rubber bush is clamped by the first pressing tool and the second pressing tool,
In the fourth step, a part of the rubber bush is bulged into one or more concave portions formed on both side surfaces of the second fitting concave portion, so that the pair of linear surfaces of the rubber bush are formed. The manufacturing method of the stabilizer bar with a rubber bush which each forms the convex part compressed by the said clamp metal fitting.   In the first step, vulcanization molding is performed so that the protruding portion of the rubber bush, the outer peripheral surface of which is the protruding curved surface, is swelled by a set amount radially outward from the target product dimension. The manufacturing method of the stabilizer bar with a rubber bush of Claim 1.

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