JP2019044924A - Buffer stopper - Google Patents

Abstract

To provide a buffer stopper having a structure which can increase the number of take-up pieces at molding, and dispenses with deburring work.SOLUTION: A buffer stopper 11 attached to an internal peripheral side of a spring has: a rubbery elastic body 21; one end part material 31 arranged at one end part of the rubbery elastic body 21; and the other end part material 41 arranged at the other end part of the rubbery elastic body 21. The rubbery elastic body 21 is bonded to one end part material 31, and not bonded to the other end part material 41. A cylindrical external insertion part 42 arranged at an external peripheral side of the rubbery elastic body 21 is arranged at the other end part material 41. In a state that a lock part 43 arranged at the cylindrical external insertion part 42 is locked to one end part material 31, the rubbery elastic body 21 is pre-compressed between the end part materials 31, 41.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a buffer stopper that stops displacement of a movable member, relative displacement between members, and the like while exerting a buffer effect.

  For example, as shown in FIG. 4, a buffer stopper 61 is mounted on the inner peripheral side of the clutch spring 51 in a transfer portion used in a hybrid vehicle, and the buffer stopper 61 is shown in FIG. End members 81 and 91 made of metal or resin are bonded by vulcanization to one end and the other end of a cylindrical rubber-like elastic body 71, respectively.

JP 2012-211669 A

  However, with the above-mentioned buffer stopper 61, the number of sampling can not be increased at the time of molding using a mold regardless of the direction of molding (longitudinal direction, lateral direction) due to its structure, so cost reduction is realized by the increase of the number of individual machining. There is a disadvantage that you can not do it. In vertical orientation molding, the number of parts can not be increased because two split molds are required, and in crosswise molding, the number of sampling numbers can not be increased because of a large area occupied by a single molded article. .

  Further, in the buffer stopper 61, burrs at the time of molding are easily generated at the outer peripheral portion of the rubber-like elastic body 71, and at the time of operation, the burrs interfere with the spring 51 and fall off, which may cause contamination. Therefore, it is necessary to carry out a burr removing operation at the time of molding, which requires time and effort for manufacturing.

  SUMMARY OF THE INVENTION In view of the foregoing, it is an object of the present invention to provide a buffer stopper having a structure which can increase the number of parts taken during molding and does not need to carry out a burr removing operation.

  In order to solve the above problems, the buffer stopper of the present invention is a buffer stopper mounted on the inner peripheral side of a spring, and is disposed on a rubber-like elastic body and one end of the rubber-like elastic body And the other end member disposed at the other end of the rubber elastic body, wherein the rubber elastic body is bonded to the one end member and the other end member. The other end member is provided with a cylindrical outer insertion portion disposed on the outer peripheral side of the rubber-like elastic body.

  As an embodiment, in the shock absorbing stopper described above, a locking portion for locking to the one end member is provided on an inner circumference of a tip of the cylindrical outer insertion portion.

  As a mode of operation, in the shock absorbing stopper described above, the distal end of the cylindrical outer insertion portion is provided with a slit portion for elastically expanding the front end of the outer insertion portion. I assume.

  Further, as an embodiment, in the buffer stopper described above, the rubber-like elastic body is pre-compressed between the both end members in a state where the locking portion is locked to the one end member It is characterized by

  In the present invention, since the rubbery elastic body is adhered to one end member and is not adhered to the other end member, a molded article comprising the rubbery elastic body and one end member is molded. It is possible to retrofit the other end member to this molded article. Since a molded article made of a rubber-like elastic body and one end member is provided on one side of the end member, it is possible to secure a large number of parts at the time of molding.

  In addition, since the other end member is provided with a cylindrical outer insertion portion and this cylindrical outer insertion portion is disposed on the outer peripheral side of the rubber-like elastic body, burrs during molding are formed on the outer peripheral portion of the rubber-like elastic body Even if the remainder is generated, the burrs are accommodated on the inner peripheral side of the tubular extrapolation portion. Therefore, since the burr does not interfere with the spring, it is possible to prevent the burr from interfering with the spring and coming off and generating contamination, thereby making the burr removing operation unnecessary.

  From the above, it is possible to provide a buffer stopper having a structure which can increase the number of parts removed at the time of molding and does not need to carry out a burr removing operation.

The perspective view which shows the buffer stopper concerning embodiment of this invention (A) is a sectional perspective view of the shock absorbing stopper, (B) is a sectional perspective view of the shock absorbing stopper in a disassembled state (A) is a cross-sectional perspective view showing the unloaded condition of the shock absorbing stopper, (B) is a cross-sectional perspective view showing a condition when the shock absorbing stopper is loaded A perspective view showing a shock absorbing stopper according to a conventional example Perspective view (single part drawing) showing a shock absorber according to the prior art

  As shown in FIG. 1, the buffer stopper 11 according to the embodiment is mounted on the inner peripheral side of the clutch spring (coil spring) 51 in the vehicle transfer portion, and is shown in FIG. Thus, a rubber-like elastic body (spring member) 21 exhibiting a cylindrical shape, one end member 31 disposed at one end (the lower end in the drawing) of the rubber-like elastic body 21, and a rubber-like elastic body It is comprised by the combination with the other end member 41 arrange | positioned at the other end (in the figure upper end) of 21. FIG. One end member 31 and the other end member 41 are respectively formed of a hard material such as resin or metal.

  As shown in FIG. 2 (B), the rubber-like elastic body 21 is bonded by vulcanization to one end member 31 and is not bonded to the other end member 41 by vulcanization and is not bonded. Thus, at the time of manufacture of the buffer stopper 11, it is possible to form a vulcanized molded product comprising the rubber-like elastic body 21 and one end member 31 and then assemble the other end member 41 to this vulcanized molded product by retrofitting. It is assumed.

  One end member 31 is formed in a disk shape, and a hook-shaped locking portion 32 for locking the hook-shaped locking portion 43 of the other end member 41 to be described later is formed on the outer periphery in the radial direction It is provided integrally toward the direction.

  The other end member 41 is formed in a disk shape, and at the outer peripheral edge portion of one end face thereof, the cylindrical outer insertion portion 42 disposed on the outer peripheral side of the rubber-like elastic body 21 is closer to the one end member 31 It is integrated towards the end.

  In addition, a hook-shaped locking portion 43 which is locked to the hook-shaped locking portion 32 provided on the one end member 31 is integrally provided on the inner peripheral portion of the tip of the cylindrical outer insertion portion 42. The tip end of the cylindrical outer insertion portion 42 is divided into a plurality of parts on the circumference so as to elastically expand the diameter of the tip end of the cylindrical outer insertion portion 42 at the tip end of the cylindrical outer insertion portion 42 A plurality of slit portions 44 for the purpose are provided circumferentially.

The dimensions of the above parts are as follows: the inner diameter of the spring 51 is d ₁ , the outer diameter of the cylindrical outer fitting portion d ₂ , the inner diameter of the cylindrical outer fitting d ₃ , and the rubber elastic body 21 Assuming that the outside diameter dimension is d ₄ ,
The relationship of d ₁ > d ₂ > d ₃ > d ₄ is established.

Further, in a state where the claw-shaped locking portion 43 is locked to the hook-shaped locking portion 32, the height dimension h ₂ (FIG. 2A) of the rubber-like elastic body 21 is that of the rubber-like elastic body 21. It is set to be smaller than the height dimension h ₁ (FIG. 2 (B)) in the free state (h ₂ <h ₁ ), that is, the hook-shaped locking portion 43 is a hook-shaped locking portion 32. In the locked state, the rubber-like elastic body 21 is sandwiched between the end members 31 and 41 in the height direction to be precompressed.

  In the buffer stopper 11 having the above configuration, the rubber-like elastic body 21 is vulcanized and bonded to one end member 31 and is not bonded to the other end member 41 without being vulcanized and bonded, so It is possible to form a vulcanized molded product consisting of the rubber-like elastic body 21 and one end member 31 at the time of manufacturing the buffer stopper 11 and then assemble the other end member 41 to this vulcanized molded product by retrofitting. There is. Since the vulcanized molded product consisting of the rubber-like elastic body 21 and one end member 31 is not arranged on both sides of the end member but installed on one side, a large number of individual moldings in the mold for vulcanization molding is secured. be able to.

  In addition, since the cylindrical outer insertion portion 42 is provided on the other end member 41 and the cylindrical outer insertion portion 42 is disposed on the outer peripheral side of the rubber elastic body 21, the outer peripheral portion of the rubber elastic body 21 is Even if burrs are generated at the time of molding, the burrs are accommodated on the inner peripheral side of the tubular outer insertion portion 42. Therefore, since the burr does not interfere with the spring 51, it is possible to prevent the burr from interfering with the spring 51 and coming off to generate contamination, thereby making the burr removing operation unnecessary.

  Therefore, as in the purpose of the present invention, it is possible to provide the buffer stopper 11 having a structure capable of increasing the number of parts removed at the time of molding and not having to carry out the burr removal operation. The production cost of the buffer stopper 11 can be reduced by omitting the securing and the deburring operation.

  Further, in the cushioning stopper 11 having the above configuration, the other end member 41 is provided with the cylindrical outer insertion portion 42, and the cylindrical outer insertion portion 42 is disposed on the outer peripheral side of the rubber elastic body 21. Not only the above-described burrs, but also the rubber-like elastic body 21 itself does not interfere with the spring 51. Therefore, it is possible to prevent the rubber-like elastic body 21 from interfering with the spring 51 at the time of elastic deformation and being pinched and broken between the lines of the spring 51. As shown in FIG. 3A to FIG. 3B, the rubber-like elastic body 21 is compressed in the height direction in response to the input of a load, and expands outward in the radial direction. It is pressed against the inner surface.

  Further, since the rubber-like elastic body 21 is pressed against the inner peripheral surface of the tubular outer inserting portion 42 in response to the input of the load as described above, the inner peripheral surface of the tubular outer inserting portion 42 is obtained. The spring characteristics of the rubber-like elastic body 21 can be switched before and after contacting with. Therefore, after contact, a large reaction force is generated in the rubber-like elastic body 21. Therefore, even if excessive impact energy is input, this can be effectively absorbed, and the generation of a hitting sound and the like can be suppressed.

  Moreover, in the buffer stopper 11 of the said structure, in the state by which the nail-like latching | locking part 43 was latched to the hook-like latching | locking part 32, and the space between one end member 31 and the other end member 41 was defined. Since the rubber-like elastic body 21 is structured so as to be held between the end members 31 and 41 and pre-compressed, it is possible to expand the adjustment width of the buffer characteristic (mainly rigidity) of the buffer stopper 11 ing. That is, if the precompression amount is set small, a low spring is realized, and if a large precompression amount is set, a high spring is realized. Therefore, the buffer characteristic of the stopper 11 is arbitrarily adjusted depending on the set precompression amount. be able to.

  Also, as described above, since the buffer characteristics of the stopper 11 can be arbitrarily adjusted depending on the amount of the pre-compression amount to be set, the other ends of the plurality of types having different lengths and dimensions of the tubular extrapolation portion 42 By preparing the member 41 and selectively using any one of the end members 41, it is possible to arbitrarily select the buffer characteristic of the buffer stopper 11 among the prepared options. In this case, since the vulcanized molded product composed of the rubbery elastic body 21 and the one end member 31 which are expensive to manufacture can be used commonly, it is possible to provide a plurality of buffer stoppers 11 at a low cost as a whole.

  The buffer stopper of the present invention is used, for example, in a coupling device. The shock absorber stopper of the present invention is used, for example, in a vibration reducing damper device.

DESCRIPTION OF SYMBOLS 11 Buffer stopper 21 Rubber-like elastic body 31 One end member 32 Cage-shaped latching | locking part 41 The other end member 42 Tubular insertion part 43 Claw-shaped latching | locking part 44 Slit part 51 Spring

Claims (4)

A rubber stopper, one end member disposed at one end of the rubber elastic body, and the other end of the rubber elastic body. A buffer stopper having the other end member disposed in the
The rubber-like elastic body is bonded to the one end member and non-bonded to the other end member,
A buffer stopper characterized in that the other end member is provided with a cylindrical outer insertion portion disposed on the outer peripheral side of the rubber-like elastic body. In the buffer stopper according to claim 1,
A cushioning stopper characterized in that a locking portion for locking to the one end member is provided on an inner circumference of a tip end of the tubular extrapolation portion. In the buffer stopper according to claim 2,
A shock-absorbing stopper characterized in that a slit portion for elastically enlarging a diameter of a tip end of the extrapolation portion is provided at a tip end of the cylindrical extrapolation portion. In the buffer stopper according to claim 2 or 3,
A buffer stopper characterized in that the rubber-like elastic body is precompressed between the both end members in a state where the locking portion is locked to the one end member.

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