JPH066833U - Snap ring and seal with snap ring as core - Google Patents

Abstract

(57) [Summary] [Purpose] Prevents deformation from occurring even when heat treatment is performed. Further, when used as a core metal of a seal, it should prevent distortion or wrinkling in a part of the seal. [Structure] A snap ring 1 composed of a ring 2 having no cut, wherein at least one location 3 of the ring 2 is elastically deformable in the circumferential direction.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a snap ring used for preventing axial movement of a component inserted in a shaft or a hole by fitting it in a groove formed in the shaft or the hole, and a seal using the snap ring as a core metal.

[0002]

[Prior art]

 As a conventional snap ring, for example, one having a cut 103 in a part of a ring 101 as shown in FIG. 4 (a) is known.

[0003]

[Problems to be solved by the device]

 However, in the above-mentioned conventional snap ring 101, when the cut 103 is provided in the ring 102 or when heat treatment is performed after the cut 103 is provided, as shown in FIG. Sometimes they twisted together. This is particularly likely when the ring 102 is a thin plate.

For this reason, there is backlash when the snap ring 101 is attached, or the automation of the manufacture of the snap ring 101 is hindered.

On the other hand, when the above-mentioned conventional snap ring 101 is used as a core metal of a seal, a sealing material made of rubber or resin is fixed to the entire surface of the ring 102 including the cut portion 103. At this time, the sealing material sometimes had distortion and wrinkles at the cut portion 103.

Therefore, in the process of manufacturing a seal using the snap ring 101 as a core metal, it is necessary to adjust the distortion and wrinkles generated in the sealing material.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a snap ring that does not easily deform even when heat treatment or the like is performed.

Another object of the present invention is to provide a seal which is free from distortion and wrinkles when a snap ring is used as a cored bar.

[0009]

[Means for Solving the Problems]

 In order to solve the above-mentioned problems, the present invention provides a snap ring composed of an integrated ring having no cut end, wherein at least one portion of the ring has a shape that is elastically deformable in the circumferential direction.

[0010] Further, the seal is a seal having an integral ring without a cut end as a core metal.

[0011]

[Action]

 In the snap ring configured as described above, at least one part of the ring has a shape that is elastically deformable in the circumferential direction. The function of the snap ring is that it fits into the attached groove.

Further, in the present snap ring, since there is no cut in the ring, deformation is unlikely to occur during heat treatment or the like.

Further, since the ring has no cut, when this is used as the core metal of the seal, distortion and wrinkles are less likely to occur in the seal material fixed to the surface thereof.

[0014]

【Example】

 The present invention will be described below based on the illustrated embodiment.

1 (a) to 1 (c) show a snap ring 1 according to an embodiment of the present invention, which is composed of an integral ring 2 having no cut end, the material of which is steel, synthetic resin or the like. .

At least one portion of the ring 2, in this embodiment, four portions at equal intervals are elastically deformable in the circumferential direction.

The elastically deformable shape is that the ring 2 is curved in an arc shape in a direction perpendicular to a plane including the circumference of the ring 2. In this embodiment, the inner diameter of the curved portion 3 is set to be larger than that of the non-curved portion, and the outer diameter of the curved portion 3 is set to be smaller than that of the non-curved portion. The width in the radial direction is smaller than the others.

The operation and effect of the snap ring 1 according to this embodiment having the above structure will be described below.

Since at least one portion of the ring 2 has a shape in which the ring 2 is curved in an arc shape in a direction perpendicular to a plane including the circumference of the ring 2, the ring 2 is formed in a center direction of the ring 2 or a radial direction opposite thereto. By applying a force, the portion 3 of that shape contracts or extends in the circumferential direction. This makes it possible to fit the groove formed in the shaft or the hole into the groove having a width equal to or larger than the height of the curved portion 3 of the ring.

Further, in this embodiment, since the radial width of the arcuately curved portion 3 is set smaller than the others as described above, the groove formed in the shaft or the hole is It can be fitted into a groove that is wider than the thickness of the ring, and functions as a snap ring.

In addition, in this embodiment, since four portions are formed in a circular arc shape at four locations at equal intervals on the circumference, when the force is applied in the center direction or the radial direction of the ring 2, the ring 2 The entire circumference of the ring expands and contracts uniformly, and the circularity of the ring 2 is maintained well.

Further, in the snap ring 1 according to the present embodiment, since the ring 2 does not require a cut end, the step of providing the cut end at the time of manufacturing the snap ring 1 becomes unnecessary. Along with this, the problem of deformation of the end of the ring that occurs when the cut is provided is eliminated.

Since the ring 2 has no cut, the ring 2 is unlikely to be twisted even when heat-treated, and a snap ring with high roundness can be obtained.

In this embodiment, an example in which the shape that is deformable in the circumferential direction is curved in an arc shape is shown, but the present invention is not limited to this, and it is freely deformable in the circumferential direction. So long as it has another shape.

Next, FIG. 2A shows a seal 4 using the snap ring 1 shown in the previous embodiment as a core metal.

The seal 4 is formed by fixing a sealing material 5 made of rubber, resin or the like on the surface of the snap ring 1.

The seal member 5 has a lip 6 that comes into contact with a shaft 9 as a mating member to perform sealing.

FIG. 2B shows a state in which the seal 4 is fitted in the groove 8 of the housing 7 and the shaft 9 is hermetically sealed.

FIG. 3 shows a seal 4 which is fitted in a groove 10 provided in the shaft 9 and seals the housing 7.

The following effects can be obtained by manufacturing the seal 4 shown in FIG. 2 or FIG. 3 using the coreless snap ring 1 shown in the previous embodiment.

Since there is no cut in the snap ring 1 as the core metal, the sealing material 5 is not distorted or wrinkled at the cut, unlike the conventional case, and the size of the lip 6 which is the most important for sealing is Stability is secured.

Further, in connection with this, the work such as the distortion of the seal material and the adjustment of wrinkles becomes unnecessary, and the manufacture of the seal becomes easy.

[0033]

[Effect of device]

 As described above, the snap ring of the present invention does not require a cut end in the ring, and therefore the step of providing a cut end during the manufacture of the snap ring is unnecessary. Along with this, the problem of deformation of the end of the ring that occurs when making the cut is solved.

Further, since the ring 2 has no cut, the ring is less likely to be twisted even when heat-treated, and a snap ring with high roundness can be obtained.

Further, since the snap ring has no cut, if this is used as the core metal of the seal, the seal material will not be distorted or wrinkled at the cut as in the conventional case, and the seal is most important. The dimensional stability of the lip is ensured.

Further, in connection with this, the work such as the distortion of the seal material and the adjustment of wrinkles becomes unnecessary, and the manufacture of the seal becomes easy.

[Brief description of drawings]

FIG. 1 relates to a snap ring according to an embodiment of the present invention,
(a) is a plan view of the snap ring, (b) is AA of (a)
Sectional drawing on the line, (c) is a sectional view on the BB line of (a).

2A and 2B relate to a seal using a snap ring as a core metal according to an embodiment of the present invention, FIG. 2A is a plan view of the seal, and FIG. 2B is a front half cross-sectional view with the seal attached.

FIG. 3 relates to another seal having a snap ring according to an embodiment of the present invention as a core bar, (a) is a plan view of the seal, and (b) is a front half sectional view of the seal attached. is there.

FIG. 4 (a) is a plan view showing a conventional snap ring,
(b) is a front view showing a state when the snap ring is deformed.

[Explanation of symbols]

 1 Snap ring 2 Ring 4 Seal

Claims (2)

[Scope of utility model registration request] 1. An integral snap ring comprising a ring without a cut, wherein at least one portion of the ring has a shape elastically deformable in the circumferential direction. 2. A seal using the snap ring according to claim 1 as a core metal.