JP6893455B2 - Buffer stopper - Google Patents

Description

The present invention relates to a buffer stopper that stops displacement of movable members, relative displacement between members, etc. while exerting a buffering action.

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

Japanese Unexamined Patent Publication No. 2012-21169

However, due to the structure of the buffer stopper 61, it is not possible to increase the number of pieces to be taken at the time of molding by the mold regardless of the orientation of vulcanization molding (vertical orientation or horizontal orientation). There is an inconvenience that it cannot be done. In vertical molding, the number of pieces cannot be increased because a split mold is required, and in horizontal molding, the number of pieces cannot be increased because the area occupied by each molded product is large. ..

Further, in the buffer stopper 61, burrs are likely to remain on the outer peripheral portion of the rubber-like elastic body 71 during molding, and the burrs may interfere with the spring 51 and fall off during operation, resulting in contamination. Therefore, it is necessary to perform deburring work at the time of molding, which makes manufacturing laborious and time-consuming.

In view of the above points, it is an object of the present invention to provide a buffer stopper having a structure capable of increasing the number of pieces to be taken at the time of molding and not requiring deburring work.

In order to solve the above problems, the cushioning stopper of the present invention is a cushioning stopper mounted on the inner peripheral side of the spring, and is arranged at one end of the rubber-like elastic body and the rubber-like elastic body. In a buffer stopper having an end member of the rubber-like elastic body and the other end member arranged at the other end portion of the rubber-like elastic body, the rubber-like elastic body is adhered to the one end member and the other end member. It is non-adhesive to the end member, and the other end member is provided with a tubular external portion arranged on the outer peripheral side of the rubber-like elastic body.

As an embodiment, the buffer stopper described above is characterized in that a locking portion for locking to one of the end members is provided on the inner circumference of the tip of the tubular extrapolated portion.

Further, as an embodiment, in the above-described buffer stopper, a slit portion for elastically expanding the diameter of the tip of the extrapolated portion is provided at the tip of the tubular extrapolated portion. And.

Further, as an embodiment, in the buffer stopper described above, 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. It is characterized by being.

In the present invention, since the rubber-like elastic body is adhered to one end member and non-adhesive to the other end member, after molding the molded product composed of the rubber-like elastic body and one end member. The other end member can be retrofitted to this molded product. Since the molded product composed of the rubber-like elastic body and one end member is installed on one side of the end member, it is possible to secure a large number of pieces at the time of molding.

Further, since a tubular extrapolation portion is provided on the other end member and the tubular extrapolation portion is arranged on the outer peripheral side of the rubber-like elastic body, burrs at the time of molding are provided on the outer peripheral portion of the rubber-like elastic body. Even if the residue is generated, the burr is stored on the inner peripheral side of the tubular extrapolation part. Therefore, since the burrs do not interfere with the spring, it is possible to prevent the burrs from interfering with the spring and falling off to cause contamination, which eliminates the need for deburring work.

Therefore, from the above, it is possible to provide a buffer stopper having a structure that can increase the number of pieces to be taken at the time of molding and does not require deburring work.

Perspective view which shows the cushioning stopper which concerns on embodiment of this invention. (A) is a cross-sectional perspective view of the buffer stopper, and (B) is a cross-sectional perspective view of the buffer stopper in a disassembled state. (A) is a cross-sectional perspective view showing a no-load state of the buffer stopper, and (B) is a cross-sectional perspective view showing a state of the buffer stopper when a load is input. Perspective view showing a cushioning stopper according to a conventional example Perspective view (single item view) showing a buffer stopper according to a conventional example.

As shown in FIG. 1, the cushioning 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. 2 (A). As described above, the rubber-like elastic body (spring member) 21 having a columnar shape, the one end member 31 arranged at one end (lower end in the figure) of the rubber-like elastic body 21, and the rubber-like elastic body. It is composed of a combination with the other end member 41 arranged at the other end portion (upper end portion in the figure) of 21. One end member 31 and the other end member 41 are each formed of a hard material such as resin or metal.

As shown in FIG. 2B, the rubber-like elastic body 21 is vulcanized and adhered to one end member 31 and is not vulcanized and adhered to the other end member 41 and is not adhered. Therefore, at the time of manufacturing the buffer stopper 11, it is possible to mold a vulcanized molded product composed of a rubber-like elastic body 21 and one end member 31 and then assemble the other end member 41 to the vulcanized molded product afterwards. It is said that.

One end member 31 is formed in a disk shape, and a collar-shaped locking portion 32 for locking the claw-shaped locking portion 43 of the other end member 41, which will be described later, is radially outside the outer peripheral portion thereof. It is provided integrally toward the direction.

The other end member 41 is formed in a disk shape, and a tubular extrapolation portion 42 arranged on the outer peripheral side of the rubber-like elastic body 21 is located on the outer peripheral edge portion of one end surface of the one end member 31. It is provided integrally toward.

Further, a claw-shaped locking portion 43 for locking to the collar-shaped locking portion 32 provided on the one end member 31 is integrally provided on the inner peripheral portion of the tip of the tubular extrapolated portion 42. , The tip of the tubular extrapolation 42 is divided into a plurality of parts on the circumference in order to elastically expand the diameter of the tip of the tubular extrapolation 42. A plurality of slit portions 44 are provided on the circumference.

The dimensions of each of the above parts are as follows: the inner diameter of the spring 51 is d ₁ , the outer diameter of _{the tubular extrapolation 42 is d 2} , the inner diameter of the tubular extrapolation 42 is d ₃ , and the rubber-like elastic body 21. outer diameter as _{d 4,}
The relationship is d ₁ > d ₂ > d ₃ > d _4.

Further, in a state in which the claw-like engaging portion 43 is engaged with the flange-shaped engaging portion 32, the rubber-like elastic body 21 and the height dimension h _{2 (FIG.} 2 (A)) is a rubber-like elastic member 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 claw-shaped locking portion 43 becomes the rubber-shaped locking portion 32. In the locked state, the rubber-like elastic body 21 is sandwiched between both end members 31 and 41 in the height direction and is precompressed.

In the buffer stopper 11 having the above configuration, the rubber-like elastic body 21 is vulcanized and adhered to one end member 31 and is not vulcanized and adhered to the other end member 41, so that the rubber-like elastic body 21 is not vulcanized and adhered. It is possible to mold a vulcanized molded product composed of a rubber-like elastic body 21 and one end member 31 at the time of manufacturing the buffer stopper 11, and then retrofit the other end member 41 to this vulcanized molded product. There is. Since the vulcanized molded product composed of the rubber-like elastic body 21 and one end member 31 is installed on one side instead of being arranged on both sides of the end member, a large number of pieces are secured at the time of molding in the vulcanization molding die. be able to.

Further, since the other end member 41 is provided with the tubular extrapolation portion 42 and the tubular extrapolation portion 42 is arranged on the outer peripheral side of the rubber elastic body 21, the outer peripheral portion of the rubber elastic body 21 Even if burrs remain during molding, the burrs are stored on the inner peripheral side of the tubular extrapolation portion 42. Therefore, since the burrs do not interfere with the spring 51, it is possible to prevent the burrs from interfering with the spring 51 and falling off to cause contamination, which eliminates the need for deburring work.

Therefore, from the above, according to the object of the present invention, it is possible to provide a buffer stopper 11 having a structure that can increase the number of pieces to be taken at the time of molding and that does not require deburring work, and can increase the number of pieces to be taken. The manufacturing cost of the buffer stopper 11 can be reduced by omitting the securing and deburring work.

Further, in the buffer stopper 11 having the above configuration, the other end member 41 is provided with a tubular extrapolation portion 42, and the tubular extrapolation portion 42 is arranged on the outer peripheral side of the rubber-like elastic body 21. Not only the burr 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 during elastic deformation and being pinched between the lines of the spring 51 and being damaged. As shown in FIGS. 3A to 3B, the rubber-like elastic body 21 is compressed in the height direction in response to the input of the load, bulges outward in the radial direction, and the tubular extrapolated portion 42. It is pressed against the inner peripheral surface.

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

Further, in the buffer stopper 11 having the above configuration, the claw-shaped locking portion 43 is locked to the flange-shaped locking portion 32, and the distance between one end member 31 and the other end member 41 is defined. Since the rubber-like elastic body 21 is sandwiched between both end members 31 and 41 and precompressed, it is possible to expand the adjustment range of the cushioning characteristics (mainly rigidity) of the buffer stopper 11. ing. That is, if the precompression amount is set to be small, a low spring is realized, and if the precompression amount is set to be large, a high spring is realized. Therefore, the buffer characteristics of the stopper 11 are arbitrarily adjusted depending on the amount of the precompression amount to be set. be able to.

Further, since the cushioning characteristic of the stopper 11 can be arbitrarily adjusted depending on the amount of precompression to be set in this way, the other ends of a plurality of types having different length dimensions of the tubular extrapolated portion 42. By preparing the member 41 and selectively using any of the end members 41, it is possible to arbitrarily select the cushioning characteristic of the buffer stopper 11 from the prepared options. In this case, since the vulcanized molded product composed of the rubber-like elastic body 21 and one end member 31, which are costly to manufacture, can be shared, it is possible to provide a plurality of types 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. Further, the buffer stopper of the present invention is used, for example, in a vibration reduction damper device or the like.

11 Cushioning stopper 21 Rubber-like elastic body 31 One end member 32 Collar-shaped locking part 41 The other end member 42 Cylindrical extrapolation part 43 Claw-shaped locking part 44 Slit part 51 Spring

Claims (4)

A cushioning stopper mounted on the inner peripheral side of the spring, which is a rubber-like elastic body, one end member arranged at one end of the rubber-like elastic body, and the other end of the rubber-like elastic body. In a cushioning stopper having the other end member disposed on the portion
The rubber-like elastic body is adhered to the one end member and non-adhesive to the other end member.
A cushioning stopper characterized in that the other end member is provided with a tubular extrapolated portion arranged 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 one of the end members is provided on the inner circumference of the tip of the tubular extrapolated portion. In the buffer stopper according to claim 2,
A cushioning stopper characterized in that a slit portion for elastically expanding the diameter of the tip of the extrapolated portion is provided at the tip of the tubular extrapolated portion. In the buffer stopper according to claim 2 or 3,
A cushioning stopper having a structure in which 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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