JP5933401B2 - Method and apparatus for assembling elastic seal ring - Google Patents

Description

  The present invention relates to an elastic seal ring assembling method and an assembling apparatus for assembling an elastic seal ring to a workpiece.

  In general, an automatic seal such as a torque converter, a hydraulic clutch, or a CVT is provided with an oil seal ring for sealing hydraulic oil in a key point. Such an oil seal ring is rotatable between a shaft and a cylinder, and sufficient oil seal performance is required. Conventionally, cast iron seal rings and fluororesin seal rings have been used as oil seal rings. However, in order to improve wear resistance, oil sealability, and reduce costs, resin seal rings that have facing openings facing each other by injection molding are used. For example, an elastic seal ring made of polyetheretherketone resin is often used. (See Patent Document 1).

Japanese Patent No. 4084729

  By the way, Patent Document 1 does not disclose how to attach a seal ring in a production line. In order to assemble the seal ring into the groove portion of the workpiece, for example, it is conceivable to place a pusher or the like on the outside of the seal ring and push the seal ring from the outside.

  However, in order to push in the seal ring while maintaining the ring shape, it is necessary to arrange a plurality of pushers, and there is a problem that the apparatus becomes large and complicated, and the manufacturing cost increases. In addition, even if multiple pushers are placed, it is difficult to press according to the ring shape, the adjustment of the direction setting, pressing timing, etc. is complicated, the behavior of the seal ring becomes unclear, and the contact due to excessive restraint There is a risk of poor fitting. Furthermore, there is a problem in that the specification changes greatly depending on the type of workpiece and the versatility is low.

  The present invention has been made in view of the above-described problems, and an object of the present invention is to assemble a seal ring with a simple configuration with high accuracy and to provide a versatile seal ring assembling method and apparatus. Is to provide.

In order to achieve the above object, the invention according to claim 1
For a workpiece (for example, a pulley assembly PA in an embodiment to be described later) having an annular groove (for example, a recessed groove 53 in an embodiment to be described later ) between the annular protrusions (for example, an annular protrusion 52 in an embodiment to be described later), A method for assembling an elastic seal ring for assembling an elastic seal ring (for example, an elastic seal ring SR in an embodiment described later) having an opposing engagement port (for example, an engagement port 60, 60 ′ in an embodiment described later),
The elastic seal ring is disposed at the same height as the inner wall surface of the annular protrusion on one side outside the groove portion of the workpiece and inside the assembly belt,
By winding up the assembly belt, the elastic seal ring is assembled in the groove portion by the tension of the assembly belt (for example, the assembly belt 12 in an embodiment described later).

In order to achieve the above object, the invention according to claim 2
Opposing openings (for example, engaging openings 60 in the embodiments described later) facing a workpiece (for example, a pulley assembly PA in the embodiments described later) having an annular groove (for example, a recessed groove 53 in the embodiments described later). 60 ′) an elastic seal ring (for example, an elastic seal ring SR in an embodiment to be described later), an assembly device for an elastic seal ring (for example, an assembly device 10 in an embodiment to be described later),
A stage for positioning the workpiece (for example, a stage 11 in an embodiment described later);
An assembly belt (for example, an assembly belt 12 in an embodiment described later) disposed on the stage;
A guide member (for example, a guide pin 13 in an embodiment described later) disposed on the stage so as to surround the workpiece and positioning the assembly belt;
A belt winding device (for example, a belt winding device 14 in an embodiment described later) for winding the assembly belt;
The elastic seal ring is disposed outside the groove portion of the workpiece and inside the assembly belt, and the assembly belt is wound up by the belt winding device, whereby the elastic seal ring is applied by tension of the assembly belt. Is assembled to the groove.

In addition to the structure of claim 2, the invention according to claim 3
The stage can be separated in a plane perpendicular to the axial direction of the workpiece (for example, a first stage 11A in an embodiment described later) and a second stage (for example, a second stage 11B in an embodiment described later). ) And
The first stage and the second stage, and each of said assembling belt, the front Kiga id member, characterized in that it comprises, and the belt retractor.

  According to the first and second aspects of the present invention, the elastic seal ring can be smoothly assembled to the groove portion of the workpiece following the shape of the elastic seal ring by assembling the elastic seal ring with the assembly belt. Further, since the assembly belt may be wound by one or two driving devices, the assembly mechanism can be simplified and the cost can be reduced. Furthermore, since the belt tension can be changed in accordance with the winding amount, the degree of freedom in adjusting the load is high. Furthermore, it is highly versatile without requiring significant specification changes depending on the workpiece shape.

  According to the third aspect of the present invention, when the workpiece is positioned on the stage, the workpiece may be transported in one direction, so that the workpiece can be positioned easily.

It is sectional drawing of the pulley assembly of a continuously variable transmission. It is the elements on larger scale of FIG. It is a top view of an elastic seal ring. FIG. 4 is a perspective view of a joint of the elastic seal ring of FIG. 3. It is explanatory drawing explaining the assembly | attachment method of an elastic seal ring, (a) is at the time of workpiece conveyance, (b) is at the time of workpiece positioning, (c) is at the time of elastic seal ring mounting, (d) is an elastic seal ring assembly It is time. It is a fragmentary sectional view of the state of Drawing 5 (c). It is explanatory drawing explaining the assembly method of a pulley assembly and a piston cover, (a) is at the time of piston cover conveyance, (b) is during assembly, (c) is at the time of completion of assembly. It is explanatory drawing explaining the other assembly methods of a pulley assembly and a piston cover, (a) is at the time of piston cover conveyance, (b) is during assembly, (c) is at the time of assembly completion.

  Hereinafter, an elastic seal ring assembling method and an assembling apparatus according to an embodiment of the present invention will be described in detail with reference to the drawings. In the following description, a pulley assembly of a continuously variable transmission will be described as an example of a work to which an elastic seal ring is attached, but the present invention is not limited to this.

  First, a pulley assembly of a continuously variable transmission to which an elastic seal ring is attached will be described with reference to FIG. In the drawing, symbol PA denotes a pulley assembly incorporated in a continuously variable transmission, and shows one of an input side drive pulley assembly and an output side driven pulley assembly having the same structure. The structure is such that a tapered plate B1 constituting one slope of the V-groove is integrally formed on the rotating shaft S, and the inner diameter side cylindrical portion 50 of the tapered plate B2 constituting the other slope of the V-groove is rotated. The shaft S is attached so as to be movable in the axial direction of the rotary shaft S via a ball spline. Then, the piston cover PC that forms the hydraulic chamber OC between the back surface of the plate B2 is fixed to the rotating shaft S, and the hydraulic chamber OC is operated via an oil passage branched from the hydraulic pressure supply path L of the rotating shaft S. When oil is guided, the plate B2 moves toward the plate B1 so that the groove width of the V-groove is narrowed. In the hydraulic chamber, a spring (not shown) for urging the plate B2 in the direction of the plate B1 is contracted.

  The plate B2 is provided with a concave groove 53 between two annular protrusions 52 formed on the outer peripheral surface of the outer diameter side cylindrical portion 51, and a resin elastic seal ring SR is assembled in the concave groove 53. The plate B2 and the piston cover PC are sealed. In the elastic seal ring SR, a part of the ring is cut to form an opening facing both ends.

  As shown in FIGS. 3 and 4, the joint of the elastic seal ring SR is formed by joints 60 and 60 ′ facing each other. The abutment 60 connects the two side surfaces in the rectangular cross section of the elastic seal ring SR and bisects the ring inner surface 61a and the ring outer surface 61b at the tip of the rectangular cross section on the ring inner surface 61a. A butt surface 62 is formed. Further, the rectangular cross section 1b on the ring outer diameter surface side includes a first pocket 63 that is retreated from the abutting surface 62 by removing one rectangular cross section that further divides this portion in the axial direction, and the other rectangular cross section. A second pocket 64 which is further removed from the abutting surface 62 by further removing the portion is formed. The outer peripheral surfaces of the first pocket 63 and the second pocket 64 are formed to have a predetermined curvature of the elastic seal ring SR.

  On the other hand, the other abutment 60 ′ has a butting surface 62 ′, a first lip 63 ′ and a second lip formed so as to complementarily fit with the butting surface 62, the first pocket 63 and the second pocket 64. 64 '. That is, when the abutting surfaces 62 and 62 'abut each other, the first pocket 63 and the first lip 63' are fitted, and the second pocket 64 and the second lip 64 'are fitted, respectively. Thus, the length of the first pocket 63 and the first lip 63 'and the length of the second pocket 64 and the second lip 64' are formed to be substantially the same. When the mating ports 60 and 60 'are fitted, the elastic seal ring SR is substantially circular as shown in FIG.

Next, an assembly device for the elastic seal ring SR (hereinafter simply referred to as an assembly device) and an assembly method for the elastic seal ring SR using the assembly device will be described with reference to FIGS.
The assembling apparatus 10 includes a stage 11 for positioning a disk-shaped workpiece, an assembling belt 12 disposed on the stage 11, a plurality of guide pins 13 for positioning the assembling belt 12 on the stage 11, and assembling. A belt take-up device 14 for taking up the belt 12. In the following description, the case where the pulley assembly PA shown in FIG. In FIG. 5, the rotation axis direction of the pulley assembly PA is the front and back direction of the paper surface, and a view of the assembling apparatus 10 as viewed from above is shown.

  The stage 11 includes a first stage 11A and a second stage 11B that are separable within a horizontal plane perpendicular to the rotational axis direction of the pulley assembly PA. The first and second stages 11A and 11B are movable in a direction close to and away from the separation line P passing through the rotation axis of the pulley assembly PA by a drive mechanism (not shown), and are separated from each other when the work is transported. It contacts on the separation line P after conveyance. In the first and second stages 11A and 11B, semicircular through holes 15A and 15B through which the outer diameter side cylindrical portion 51 of the plate B1 passes are formed at the center, and the annular protrusions 52 of the plate B2 are formed around the holes. Semicircular recesses 16A and 16B having a depth substantially equal to the width are formed in a circular shape (see FIG. 6). When the first stage 11A and the second stage 11B come into contact with each other, the semicircular through holes 15A and 15B are combined to form the through hole 15, and the outer cylindrical portion 51 is inserted into the semicircular recess 16A. 16B joins and supports the cyclic | annular protrusion 52. FIG. Further, in the state where the pulley assembly PA is conveyed and the first and second stages 11A and 11B are positioned, the inner wall surface of the annular protrusion 52 on the one side (downward) that forms the concave groove 53 of the plate B2. It is located at the same height as the seal ring placement surface 17 of the first and second stages 11A and 11B (see FIG. 6).

  A plurality of guide pins 13 are erected in a semicircular shape so as to surround the annular protrusion 52 of the plate B2 on the seal ring mounting surfaces 17 of the first and second stages 11A and 11B. An assembly belt 12 having one end fixed to the inner side and the other end attached to the belt winding device 14 is stretched. The belt winding device 14 of the first stage 11 </ b> A and the belt winding device 14 of the second stage 11 </ b> B are preferably located diagonally across the through hole 15. The belt winding device 14 is, for example, an electric winch, and the winding amount and winding speed can be adjusted.

  The assembly belt 12 is composed of a thin plate-like elastic body. The elastic seal ring SR is preferably wider than the width of the elastic seal ring SR. For example, a resinous elastic belt having a width of 10 to 20 mm and a thickness of 0.2 to 0.5 mm is used.

  With this assembling apparatus 10, the elastic seal ring SR can be assembled in the concave groove 53 formed on the outer peripheral surface of the plate B2 by using the tension applied to the assembling belt 12.

Then, the assembly method of the elastic seal ring by the assembly apparatus 10 is demonstrated.
First, in a state where the first and second stages 11A and 11B are separated from each other, the pulley assembly PA as a work is conveyed along the separation line P, and is formed in the first and second stages 11A and 11B. It arrange | positions in the position corresponding to the hole 15 (through-hole 15A, 15B) (FIG. 5 (a)). When the pulley assembly PA is transported to a predetermined position, the first and second stages 11A and 11B are moved to the separation line P side by a drive mechanism (not shown) and abut on the separation line P. As a result, the pulley assembly PA is positioned on the first and second stages 11A and 11B. At this time, the outer diameter side cylindrical portion 51 of the plate B2 is inserted through the through-hole 15, and the one-side (downward) annular projection 52 is held in the recesses 16A and 16B (FIG. 5B).

  Subsequently, the elastic seal ring SR is disposed on the seal ring mounting surface 17 outside the plate B2 so as to surround the annular protrusion 52 and inside the assembly belt 12 (FIGS. 5C and 6). . The elastic seal ring SR placed on the seal ring placement surface 17 is positioned at the same height as the inner wall surface of the annular protrusion 52 on one side (downward) of the plate B2. At this time, it is preferable that the joints 60 and 60 ′ of the elastic seal ring SR are located on the separation line P. In this state, the assembly belt 12 is taken up by the belt take-up devices 14 of the first and second stages 11A and 11B, whereby tension is applied to the assembly belt 12 and the outside of the assembly belt 12 is removed. The assembly belt 12 moves inward with the guide pins 13a and 13b on the upstream side and the downstream side in the transport direction among the plurality of guide pins 13 positioned at the position, and the assembly belt 12 abuts on the elastic seal ring SR and is elastic. Push the seal ring SR inward. At this time, the assembly belt 12 winds the elastic seal ring SR over a wide range in the circumferential direction, and an ideal copying state in which the other side is sequentially fixed from one side in the circumferential direction can be realized. As a result, the mating ports 60 and 60 'are fitted, and the elastic seal ring SR is incorporated into the concave groove 53 (FIG. 5D).

  Subsequently, while the rotation shaft S of the pulley assembly PA is supported by a support member (not shown), the piston cover PC is transported downward from above (FIG. 7A), and the first and second stages. The elastic seal ring SR is transferred between the assembly belt 12 and the piston cover PC by moving 11A and 11B downward by a moving mechanism (not shown) (FIG. 7B). That is, the elastic seal ring SR pressed by the assembly belt 12 is gradually pressed by the piston cover PC. Finally, the assembly belt 12 is separated from the elastic seal ring SR, and the elastic seal ring SR is moved to the piston cover PC. (Fig. 7 (c)). Thereby, the space between the plate B2 and the piston cover PC is sealed by the elastic seal ring SR.

  The piston cover PC is assembled by relatively moving the assembly belt 12 and the pulley assembly PA. As described above, the assembly belt 12 is attached with the pulley assembly PA fixed. The first and second stages 11A and 11B may be moved, or the pulley assembly PA may be moved while the first and second stages 11A and 11B to which the assembly belt 12 is attached are fixed. Good.

  When the pulley assembly PA is moved, the first and second stages 11A and 11B are configured such that the recess 16 is movable independently of the seal ring mounting surface 17, and the piston cover PC is disposed above the assembly belt 12. In this state (FIG. 8A), the elastic seal ring SR is transferred between the assembly belt 12 and the piston cover PC by moving the recess 16 upward (FIG. 8B) ( FIG. 8 (c)).

  As described above, according to the present embodiment, the elastic seal ring SR can be assembled smoothly following the shape of the elastic seal ring SR by assembling the elastic seal ring SR with the assembly belt 12. Further, since the tension of the assembly belt 12 can be changed according to the winding amount of the assembly belt 12, the degree of freedom in adjusting the load load is high. Furthermore, it is highly versatile without requiring significant specification changes depending on the workpiece shape.

  Further, in the above embodiment, the assembly belt may be wound by two belt winding devices, so that the assembly mechanism is simplified and the cost is reduced as compared with the case of assembly by a pusher or the like. can do. In the above-described embodiment, the stage 11 is composed of the first and second stages 11A and 11B that can be separated, and the assembly belt 12, the plurality of guide pins 13, and the belt winding device 14 are arranged in each. However, the present invention is not limited to this, and a plurality of guide pins 13 may be arranged on one stage 11 so that one assembly belt 12 can be wound by one belt winding device 14.

In addition, this invention is not limited to embodiment mentioned above, A deformation | transformation, improvement, etc. are possible suitably.
For example, the guide member is not limited to the guide pin 13 but may be a guide plate or a guide piece, and the number and arrangement thereof can be appropriately changed.
Further, the belt winding device 14 is not necessarily arranged on the stage 11.
Further, the sealing ring abutment 60, 60 'is not limited to the above embodiment, and a straight cut shape, a step shape, a composite step shape, or the like can be adopted.

DESCRIPTION OF SYMBOLS 10 Assembly apparatus 11 Stage 11A 1st stage 11B 2nd stage 12 Assembly belt 13 Guide pin (guide member)
14 Belt winding device 53 Groove (groove)
60, 60 'mating PA pulley assembly (work)
SR Elastic seal ring

Claims (3)

An assembly method of an elastic seal ring for assembling an elastic seal ring having an opposing joint to a workpiece having an annular groove between annular projections ,
The elastic seal ring is disposed at the same height as the inner wall surface of the annular protrusion on one side outside the groove portion of the workpiece and inside the assembly belt,
A method of assembling the elastic seal ring, wherein the elastic seal ring is assembled to the groove portion by the tension of the assembly belt by winding the assembly belt. An assembly device for an elastic seal ring for assembling an elastic seal ring having an opposing joint to a workpiece having an annular groove,
A stage for positioning the workpiece;
An assembly belt disposed on the stage;
A guide member disposed on the stage so as to surround the workpiece and supporting the assembly belt;
A belt take-up device for taking up the assembly belt,
The elastic seal ring is disposed outside the groove portion of the workpiece and inside the assembly belt, and the assembly belt is wound up by the belt winding device, whereby the elastic seal ring is applied by tension of the assembly belt. An assembly device for an elastic seal ring, wherein the assembly is assembled to the groove portion. The stage is composed of a first stage and a second stage that are separable within a plane perpendicular to the axial direction of the workpiece,
The first stage and the second stage, and each of the assembly belt, before and Kiga id member, a set of resilient sealing ring according to claim 2, characterized in that it comprises a said belt winder Attached equipment.

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