JPH0594538U - Cage for one-way clutch - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a cage for a one-way clutch that forms a stable drag force with a drive wheel, is easy to manufacture, and is inexpensive. [Structure] A flange 3 is formed at one end of an outer diameter surface of a drawn cylindrical portion 2, and a plurality of pockets 4 for inserting sprags are provided in the cylindrical portion 2 at equal intervals in the circumferential direction. Cylindrical part 2
A pair of cut-off portions 7 are formed on the ring portion 6 formed at the other end of the T-shaped piece 6 and a T-shaped piece 8 is provided between the adjacent pockets 4. The T-shaped piece 8 is bent in the outer diameter direction or the inner diameter direction to provide a contact piece portion 10 which is elastically pressed against the raceway surface of the drive wheel.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a retainer for holding a sprag of a one-way clutch.

[0002]

[Prior Art]

 One of the outer wheels and the inner wheel is a driving wheel, the other is a driven wheel, and there is a one-way clutch shown in FIG. 5 that transmits only one rotation of the driving wheel to the driven wheel. In this one-way clutch, a plurality of sprags 24 are provided between a cylindrical raceway surface 21 of an outer ring 20 and a cylindrical raceway surface 23 of an inner ring 22, and the sprags 24 have a pair of flanged cages 25, 26 having different diameters. The ribbon spring 27 installed between the cages 25 and 26 deflects each sprag 24 in the direction of engaging the raceway surfaces 21 and 23.

In the one-way clutch as described above, when the drive wheels are rapidly accelerated or decelerated, the slug 24 slips due to inertia, and wear occurs due to contact with the raceway surfaces 21 and 23. In order to prevent this, the cage is integrally rotated together with the drive wheel to synchronize the movement of the sprag 24 with the movement of the drive wheel.

As a method of integrally rotating the drive wheel and the cage, as shown in FIGS. 6 and 7, a drag clip 28 is attached to the cage 25, and the track of the outer ring 20 serving as the drive wheel is attached to the drag clip 28. A method of elastically contacting the surface 21 and applying a drag force to the retainer 25 by the rubbing force acting on the contact portion, and a method of providing the retainer 25 as shown in FIGS. 8 and 9A. The ring portion 30 on the side of the flange 29 is formed with a pair of separated portions 31 to form a T-shaped piece 33 between the adjacent pockets 32, and the column portion 34 of the T-shaped piece 33 is bent in the outer diameter direction. A method of elastically pressing the outer diameter surface of the split flange 29a against the raceway surface 21 of the outer ring 20 to apply a drag force to the cage 25 has been conventionally known.

[0005]

[Problems to be solved by the device]

 By the way, in the method using the drag clip 28, since the number of parts is large, it takes time to assemble and is disadvantageous in terms of cost.

On the other hand, in the method of elastically contacting the split flange 29a of the T-shaped piece 33 with the raceway surface 21, the outer diameter surface of the split flange 29a that contacts the raceway surface 21 is a punched surface with poor surface accuracy. However, there is a problem that the effective contact area is small and a stable drag force cannot be applied to the cage 25.

Further, since the flange 29 is thick and has high rigidity, it is difficult to separate it by pressing, and it takes a lot of time and effort to form the T-shaped piece 33, and as shown in FIG. When the retaining ring groove 35 is provided on the raceway surface 21 of 20, the split flange 29a fits into the retaining ring groove 35 when the retainer 25 is assembled, and the retainer 25 cannot be assembled.

It is a technical object of the present invention to provide a cage for a one-way clutch, which solves the above-mentioned problems and which is provided with a stable drag force, is easy to manufacture, and is inexpensive.

[0009]

[Means for Solving the Problems]

 In order to solve the above problems, in the present invention, there is provided a sprag for transmitting torque in a circumferential direction of the cylindrical part, which has a cylindrical part and a flange formed at one end of an outer diameter surface of the cylindrical part. A plurality of pockets to be inserted are provided at equal intervals, a pair of cut-off portions is formed in the ring portion at the other end of the cylindrical portion, and a T-shaped piece is provided between a pair of adjacent pockets. A plurality of T-shaped pieces are provided on the circumference, and each T-shaped piece has a contact piece portion which is elastically pressed against one raceway surface of the outer ring and the inner ring.

[0010]

As described above, since the T-shaped piece is formed by forming the cut-off portion on the thin-walled ring portion and the T-shaped piece is bent to provide the contact piece portion, the ring-shaped cut-off and the T-shaped piece are formed. The pressing method can be adopted for bending the piece, and the cage can be easily manufactured.

[0011]

【Example】

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

As shown in FIGS. 1 and 2, the metal cage 1 has a drawn cylindrical portion 2 and a flange 3 provided at one end of the outer diameter surface of the cylindrical portion 2. The cylindrical portion 2 is provided with a plurality of pockets 4 for inserting sprags at equal intervals in the circumferential direction.

Reference numeral 5 denotes a column portion formed between the pockets 4.

Further, a pair of separating portions 7 is formed on the ring portion 6 at the other end of the cylindrical portion 2, and a T-shaped piece 8 is provided between the pair of adjacent pockets 4 by the formation of the separating portion 7. . A plurality of the T-shaped pieces 8 are provided in the circumferential direction of the cylindrical portion 2.

Both ends of the split ring portion 6 a of the T-shaped piece 8 are bent in the outer diameter direction to form inclined piece portions 9, and contact piece portions 10 are provided in connection with the inclined piece portions 9. There is. The contact piece portion 10 is elastically pressed against the cylindrical raceway surface 21 of the outer ring 20 when the retainer 1 is installed inside the outer ring 20 of the one-way clutch shown in FIG.

Therefore, when the outer ring 20 rotates, a drag force is applied to the cage 1 and the cage 1 rotates together with the outer ring 20.

Here, since the outer diameter surface of the contact piece portion 10 is a drawn surface with excellent surface accuracy, it has a wide effective contact area with the cylindrical raceway surface 21 and retains the rotation of the outer ring 20. It can be stably transmitted to the vessel 1.

Further, by providing the contact piece portion 10 for the raceway surface 21 of the outer ring 20 on the side opposite to the flange side, even when the raceway surface 21 has a snap ring groove, when the retainer 1 is assembled, the snap ring groove is formed. Since the contact piece portion 10 does not fit, the retainer 1 can be easily assembled.

In the present invention, the T-shaped piece 8 is provided by forming the separating portion 7 on the thin-walled ring portion 6, and the T-shaped piece 8 is bent to form the contact piece portion 10. A pressing method can be used for separating and bending the T-shaped piece.

In the embodiment shown in FIGS. 1 and 2, the inclined piece portion 10 is formed on the split ring portion 6a and the contact piece portion 10 is provided at the end thereof, but as shown in FIGS. 3 and 4, It is also possible to form the inclined plate portion 9 on the pillar portion 5 of the T-shaped piece 8 and use the entire split ring portion 6a as the contact piece portion 10.

In the case of the embodiment, the T-shaped piece 8 is bent in the outer diameter direction of the cage 1 to form the contact piece portion 10 that comes into contact with the raceway surface of the outer ring, but when the inner ring is used as the drive wheel, , The T-shaped piece 8 is bent in the inner diameter direction to form a contact piece portion that comes into contact with the raceway surface of the inner ring.

[0022]

[Effect of the device]

 As described above, in this invention, the ring-shaped portion provided on the side opposite to the flange of the cylindrical portion is separated to form the T-shaped piece, and the T-shaped piece is bent to provide the contact piece portion. A press working method can be adopted for forming the contact piece portion, the cage can be easily manufactured, and the cost can be greatly reduced.

Further, since the contact surface of the contact piece portion with respect to the raceway surface is a diaphragm surface having excellent surface accuracy, the effective contact area is wide and a stable drag force can be applied to the cage.

[Brief description of drawings]

FIG. 1 is a perspective view showing a part of a holder according to the present invention.

FIG. 2 is a front view of the above.

FIG. 3 is a perspective view showing another example of the same cage.

FIG. 4 is a front view of the above.

FIG. 5 is a schematic diagram of a one-way clutch.

FIG. 6 is a plan view showing a part of a conventional cage.

7 is a sectional view taken along line VII-VII of FIG.

FIG. 8 is a plan view showing a part of a conventional cage.

9A is a sectional view taken along line IX-IX in FIG.
(B) is a cross-sectional view showing how the cage is installed.

[Explanation of symbols]

 2 Cylindrical part 3 Flange 4 Pocket 6 Ring part 7 Separation part 8 T-shaped piece 10 Contact piece part

Claims (1)

[Scope of utility model registration request] 1. A metal one-way clutch that holds a plurality of sprags between a cylindrical raceway surface formed on the inner circumference of an outer ring and a cylindrical raceway surface provided on the outer circumference of an inner ring. In the cage, a drawn cylindrical portion and a flange formed at one end of the outer diameter surface of the cylindrical portion are provided, and a plurality of pockets in which the sprag is inserted are required in the circumferential direction of the cylindrical portion. Provided at intervals, a pair of cut-off portions is formed on the ring portion at the other end of the cylindrical portion to form T-shaped pieces between a pair of adjacent pockets, and a plurality of T-shaped pieces are provided on the circumference. A retainer for a one-way clutch, characterized in that a contact piece portion which is elastically pressed against one raceway surface of the outer ring and the inner ring is formed on the T-shaped piece.