JPH088354Y2 - clutch - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a clutch.

[Conventional technology]

FIG. 5 shows an outline of a 3-way clutch incorporated in a power steering device of an automobile or the like. This clutch incorporates a cage 3 between an outer member 1 and an inner member 2, houses rollers 5 in a plurality of pockets 4 formed in the cage 3, and retains the cage 3 for the inner member. The roller 5 is engaged with the cylindrical inner surface 6 of the outer member 1 and the cam surface 7 of the inner member 2 by the relative rotation of the outer member 1,
The rotation applied to the inner member 2 is transmitted to the inner member 2 via the roller 5.

Further, the adjacent rollers 5 are pressed in opposite directions by the spring A, and the rollers are clutched to the cylindrical inner surface 6 and the cam surface 7 in both the right rotation and the left rotation of the cage 3.

As a clutch spring A for pressing the adjacent rollers 5 in opposite directions, conventionally, as shown in FIG. 6, a thin metal plate bent into a W shape is used.

[Problems to be solved by the device]

By the way, in the clutch spring A, since a single roller is pressed, it is necessary to install it in each of the pockets 4. For this reason, the number of parts is increased, and it is troublesome to assemble the clutch.

Further, the clutch spring A is provided on the cam surface 7 of the inner member 2.
Since it is only placed on the top, the stability is poor, and when impact force acts, it moves from its normal position and is crushed between the side surface of the pocket 4 and the roller 5, or the roller 5 is no longer pressed. There was a problem.

Then, this invention makes it a technical subject to solve the above-mentioned problems, and to reduce the number of clutch spring members in the clutch and to stabilize the mounting.

[Means for solving the problem]

In order to solve the above problems, in the present invention,
A retainer is assembled between the outer member and the inner member, rollers are incorporated in a plurality of pockets formed in the circumferential direction of the retainer, and each roller is pressed by the spring member in the circumferential direction of the retainer, In a clutch for contacting each roller with a cylindrical inner surface of an outer member and a cam surface of an outer periphery of the inner member by making the pressing directions of adjacent rollers different from each other, the spring member is provided outside the pillar formed between the pockets. It has a clip provided with a pair of side plates that elastically clamps the column from both sides on both sides of a plate body that is opposed to the radial surface or the inner diameter surface, and one end edge of each side plate in the clip is the starting point of bending. As the configuration, a configuration in which an elastic piece for pressing the roller is formed by bending and a configuration in which one pillar adjacent to the spring member is attached are adopted.

[Action]

In the clutch having the above structure, the clip is attached to the pillar formed between the pockets of the cage, and the elastic pieces provided on each of the pair of plate members of the clip are housed in the pockets on both sides of the pillar. , The adjacent rollers are pressed in opposite directions toward the cage circumferential direction.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS.

The same parts as those of the conventional example shown in FIG. 5 are designated by the same reference numerals and the description thereof will be omitted.

As shown in FIG. 1 and FIG. 2, among the plurality of pillars 8 formed between the pockets 4 of the cage 3, the adjacent pillars 8 are
Of these, a notch 9 is provided on both side surfaces of one pillar 8. A spring member A'is attached to the column 8 having the cutout portion 9, and the rollers 5 in the adjacent pockets 4 are pressed in opposite directions by the spring member A '.

The spring member A'is formed by bending a thin metal plate. This spring member A'has a clip 10
Has a structure in which a pair of side plates 12 are formed inwardly on both sides of a plate body 11 that can collide with the outer diameter surface of the column 8, and is attached to the column 8 from the outer diameter side of the cage 3. By the mounting, the pair of side plates 12 clamps the pillar 8 from both sides, and the clamping force holds the clip 10 in the mounted state.

A pair of elastic pieces 13 are formed by bending at one end of each side plate 12 of the clip 10 toward the outside of each side plate 12. The pair of elastic pieces 13 are arranged in the pockets 4 on both sides of the pillar 8 by attaching the clips 10 to the pillars 8, press the rollers 5 in the pockets 4 in the circumferential direction of the cage 3 and adjoin each other. The rollers 5 are pressed in opposite directions. Here, the bending start position of the elastic piece 13 is the second
As shown in FIG. 4 and FIG. 4, the edges may be opposite edges of the pair of side plates 12 or may be edges on the same side.

At the time of mounting the spring member A ′ having the above structure, the clip 10 is fitted to the pillar 8 from the outer diameter side of the cage 3,
The pair of elastic pieces 13 are housed in the pockets 4 located on both sides of the pillar 8, and the elastic pieces 13 press the rollers 5 in each pocket 4 in the circumferential direction of the cage 3.

Since the adjacent rollers 5 can be pressed in opposite directions by one spring member by the above-described attachment, the number of spring members A'may be 1/2 of the number of rollers.
Therefore, the number of parts can be reduced.

Further, when the spring member A'is attached, the side plate 12 of the clip 10 clamps the column, so that the stability in the attached state is good, and each elastic piece 13 is securely held in a state of pressing the roller 5. .

3 and 4 show another example of the clutch spring member. The spring member in this example has a structure in which a clip 10 'attached to the pillar 8 is provided with a pair of side plates 12' on both sides of a plate body 11 'that abuts on the inner diameter surface of the pillar 8. A clip 10 'is attached to the pillar 8 from the side.

Then, in order to securely attach the clip 10 ', each side plate
A claw 14 that engages with the outer diameter surface of the column 8 is provided on the side edge of 12 '.

[Effect of device]

As described above, in the present invention, the spring member that presses the roller incorporated in the pocket in the circumferential direction of the cage to contact the cylindrical inner surface of the outer member and the cam on the outer periphery of the inner member is the pocket. Since the elastic pieces for pressing the rollers are provided on each of the pair of side plates of the clip that holds the pillar between them, it is possible to press the adjacent rollers in opposite directions in the circumferential direction of the cage by one spring member. it can. Therefore, the number of spring members can be reduced to half the number of rollers.
Compared to a clutch that presses one roller with one spring member, the number of parts is smaller, and the clutch can be easily assembled and the cost can be reduced.

Further, since the clip for pinching the column is provided on the spring member, the attachment of the spring member can be stabilized, the adjacent roller can be surely pressed by the one elastic piece, and the clutch can be always maintained. Can be operated accurately.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of a clutch according to the present invention, FIG. 2 is an exploded perspective view showing a cage and a spring member for a clutch, and FIG. 3 is another example of a spring member for a clutch. FIG. 4 is an exploded perspective view showing a cage and a spring member for a clutch of the same, FIG. 5 is a sectional view of a conventional 3-way clutch, and FIG. 6 is a clutch spring of the same. FIG. 3 …… Cage, 4 …… Pocket, 5 …… Roller, 8 ……
Pillars, 10 …… clips, 12, 12 ′ …… side plates, 13 …… elastic pieces.

Claims (1)

[Scope of utility model registration request] 1. A retainer is assembled between an outer member and an inner member, rollers are incorporated in a plurality of pockets formed in the circumferential direction of the retainer, and each roller is surrounded by a spring member to surround the retainer. In a clutch that presses each roller in a direction and makes the pressing direction of adjacent rollers different so that each roller contacts the cylindrical inner surface of the outer member and the outer peripheral cam surface of the inner member, the spring member is formed between the pockets. Has a clip provided with a pair of side plates for elastically sandwiching the column from both sides of a plate body opposed to the outer diameter surface or the inner diameter surface of the column, and one edge of each side plate in the clip A clutch characterized in that an elastic piece for pressing a roller is bent and formed by using as a starting point of bending, and a spring member thereof is attached to one adjacent column.