JPH0322572Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a circlip that limits the range of movement of a member that slides along an axial groove. The present invention relates to a circlip that can prevent the movement of a member from being obstructed by burrs, etc., which sometimes occur unavoidably.

[Conventional technology]

For example, there are conventional circlips (snap rings) as shown in Figures 5a and 5b.
The circlip 1 is made by winding a thin metal plate in the form of a narrow band in single or multiple layers, and is mainly used as a stopper in various mechanical parts. 6a and 6b show examples of the use of conventional circlips, in which reference numeral 2 indicates a rotating member, 3 indicates a movable member that is engaged with a spline on the outer periphery of the rotating member 2 so as to be able to freely move in the axial direction, and 4 indicates the movable member 3 as an axis. This is a spring that presses to the left. The moving member 3 has a lug portion 3a and a spline portion 2 as an axial groove on the outer circumference of the rotating member 2.
It is engaged with a. A circlip groove 5 is formed on the outer periphery of the rotating member 2 in a direction perpendicular to the spline portion 2a (circumferential direction), and the circlip 1 is elastically fitted into the groove 5. The circlip 1 prevents the moving member 3 from falling off in the axial direction.

Generally, the axial width l of the groove 5 is larger than the total thickness t of the circlip 1 for convenience of assembly work, and as shown in FIGS. 6a and 6b, the movable member 3 is When pressed against 1,
A portion of the lug portion 3a enters into the groove 5.

[Problem that the invention attempts to solve]

However, when forming the circlip groove 5 on the rotating member 2 by cutting, the burr portion 6 as shown in FIGS.
The circlip groove 5 is inevitably formed near the intersection of the circlip groove 5 and the circlip groove 5. When the movable member 3 attempts to move leftward in the axial direction, the burr portion 6 interferes with the inner peripheral surface of the movable member 3, particularly the lug portion 3a, and acts as a resistance to the axial movement of the movable member 3. This resistance increases as the pressing force between the lug portion 3a and the inner wall of the spline portion 2a increases due to an increase in rotational torque, and there is a possibility that the axial movement of the moving member 3 may be blocked by a stronger force. . As a result, they sometimes malfunctioned or became inoperable.

[Means and effects for solving the problem] The present invention has been made in view of the above, and the burr portion remaining at the intersection of the axial groove in which the moving member slides and the circlip groove,
In order to prevent the inner diameter part of the moving member from interfering with the movement in the axial direction, the circlip is formed with a wide part and a narrow part, and the narrow part is shaped to protrude from the circlip groove to prevent the moving member from being restricted in its axial movement. To provide a circlip configured such that the inner diameter part does not interfere with the circlip groove.

〔Example〕

The circlip of the present invention will be explained in detail below.

Figures 1a and 1b show an embodiment of the present invention, and this circlip 10 is a thin metal plate in the form of a narrow band having a wide part 11 and a narrow part 12, which is double-wound in a spiral shape. , the narrow portion 12 having a narrow radial width W ₂ is disposed coaxially with the outer diameter side edge of the wide portion 11 having a wide radial width W ₁ . The radial width W ₃ of the inner diameter side portion (non-overlapping portion) of the wide width portion 11 where the narrow width portion 12 is not overlapped is appropriately set in relation to the groove depth of the circlip groove, which will be described later.

In other words, by configuring the inner diameter of a part of the multiple spirally wound band-shaped metal plate to be larger than the inner diameter of the other part, a non-overlapping part is formed at the inner diameter of the other part. This is the circlip of the present invention.

FIG. 2 shows an embodiment in which the circlip 10 is used as a stopper, and the movable member 16, which is spline-engaged with the outer peripheral surface of the rotary member 15 so as to be movable in the axial direction, may fall off in the axial direction (leftward in the drawing). A circlip 10 is used to prevent this. That is, the movable member 16 has lug portions 16a protruding from the inner diameter portion thereof at predetermined intervals, and is supported so as to be movable in the axial direction by the spline portion 15a serving as an axial groove on the outer periphery of the rotating member. The inner diameter portion of the wide portion 11 of the circlip 10 is fitted and supported within a circlip groove 17 that is cut and formed in the direction (circumferential direction). Circlip 10
is fitted into the groove 17 with the side on which the narrow portion 12 is located facing the moving member 16 . The axial width l of the circlip groove 17 is narrower than the total thickness t of the circlip 10 and is set to a width that allows the inner diameter part of the wide part 11 to fit therein.
protrudes from the groove 17 in the axial direction (to the right in the drawing) and is configured to be able to come into contact with the moving member 16.
Therefore, when the movable member 16 moves to the left in the axial direction and comes into pressure contact with the narrow portion 12 of the circlip 10, the inner diameter portion of the movable member, particularly the lug portion 16a, is in contact with the groove 1.
There is no overlap within 7. For this reason,
There is no possibility that the burr portion formed at the intersection of the spline portion 15 and the circlip groove 17 will interfere with the lug portion, and the axial movement of the moving member 16 will not be hindered.

Next, FIGS. 3a, b, and c show a second embodiment of the present invention, in which the circlip 10 is triple-wound,
In addition, the central wide portion 11 is formed by forming first and second narrow portions 12a and 12 which are arranged on both sides in the thickness direction so as to overlap each other.
This embodiment differs from the previous embodiment in that it is sandwiched in a sanderch state by b. That is, this circlip 10 is made by molding a thin plate into a three-turn spiral shape, having a wide band in the center in the thickness direction and continuous and integral narrow band parts at both ends in the thickness direction. It is configured in a ring shape so that the wide part and the narrow part overlap in the thickness direction. The narrow portions 12 a and 12 b are overlapped at the outer diameter side of the wide portion 11 , and the inner diameter side portion (non-overlapping portion) of the wide width portion 11 is fitted into the circlip groove 17 . The thickness of each narrow portion 12a, 12b is such that when the wide portion 11 is seated in the groove 17, one of the narrow portions 12a, 12b is a movable member at a position beyond the groove 17 in the axial direction. It is set so that it can touch 16.

In each of the above embodiments, the length of the narrow portion 12 in contact with the movable member was configured to extend around the entire circumference of the wide portion; however, if the end face of the movable member is flat, the narrow width It is sufficient if the portion 12 is provided partially.

Furthermore, the moving member 1 disposed on the rotating member 15
The present invention is not limited to regulating the axial movement of No. 6, but may be used for a movable member supported on a fixed member so as to be movable in the axial direction. Further, the present invention is not limited to a movable member, and can also be used as a fixture for preventing a member fixed on a spline portion from falling off.

In the above configuration, the movable member 16 moves axially to the left on the spline portion 15a in response to a pressing force from a pressing member (not shown), and the circlip 1
Even if pressure is applied to 0, the
As shown in Figure c, the lug portion 16 of the inner diameter of the moving member 16
Before the lug 16a reaches the circlip groove 17, it hits the narrow part 12 of the circlip and is prevented from moving further in the axial direction, so the lug 16a does not enter the groove 17. For this reason, the spline portion 1
Even if a burr is formed near the intersection of the circlip groove 5a and the circlip groove 17, there is no possibility that the axial movement will be hindered due to interference by the burr.

Further, in the second embodiment shown in FIGS. 3a to 3c, there are narrow portions 12 on both sides of the wide portion 11 seated in the groove 17 for restricting the movement of the moving member 16, so that the circlip It is convenient because there is no need to consider the direction when assembling.

Furthermore, as shown in FIG. 4, the mounting position can be applied not only to the outer circumference but also to the inner circumference.

[Effect of idea]

As mentioned above, according to the circuit clip of the present invention,
By forming a wide part and a narrow part, and by making the narrow part protrude from the circlip groove, the inner diameter part or the outer diameter part of the movable member does not overlap with the circlip groove, so that the movable member can slide freely. It is possible to prevent the axial movement from being restricted due to interference with the inner diameter portion or outer diameter portion of the movable member due to the burr portion remaining near the position where the engagement portion intersects with the circlip groove.

[Brief explanation of the drawing]

Figures 1 a and b are a front view and a plan view of an embodiment of the present invention, Figure 2 is an explanatory diagram of an example of its application, and Figures 3 a, b, and c are front views of a second embodiment of the present invention. Figures 4a and 4b are explanatory views of the case where the circlip is disposed on the inner circumference, and Figures 5a and 5b are front views and plan views showing the configuration of a conventional circlip. FIGS. 6a and 6b are an overall view and a plan view showing an example of application of a conventional circlip. Explanation of symbols: 1...Circlip, 2...Rotating member, 3...Moving member, 3a...Lug portion, 4...
Spring, 5... Circlip groove, 6... Burr part, 10... Circlip, 11... Wide part, 1
2, 12a, 12b...Narrow width portion, 15...Rotating member, 15a...Spline portion, 16...Moving member, 17...Circlip groove.

Claims (1)

[Scope of utility model registration request] A ring body made of a narrow strip-shaped thin plate consisting of a wide part and a narrow part, which is wound twice or more,
The narrow width portion is arranged to overlap the outer diameter side portion or the inner diameter side portion of the wide width portion, and when the inner diameter portion or the outer diameter portion of the wide width portion is fitted into the circlip groove, the narrow width portion A circlip characterized in that a portion contacts the movable member to prevent an inner diameter portion or an outer diameter portion of the movable member from overlapping within the circlip groove.