JPH0665897B2 - One-way clutch - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a one-way clutch that is used by being mounted on a rotating shaft in office equipment such as copiers, facsimile machines, printers, typewriters, and packaging equipment. It is a thing.

[Conventional technology]

The one-way clutch is interposed between the outer ring and the inner ring, and has a function of transmitting torque only in one direction of rotation of the outer ring or the inner ring and idling in other directions.

FIG. 5 shows a known technique, in which a plurality of plugs d serving as torque transmitting members are provided between the outer ring a and the inner ring b by a cage c.
Holding Both ends d ₁ of the sprag d are slidably contacted with the outer ring a and the inner ring b when tilted to the right, and are formed at an angle that causes the outer ring a and the inner ring b to mesh with each other when tilted to the left. It is held in a fixed position in an allowed state.

In this structure, when the outer ring a or the inner ring b rotates in the p and p'directions, the sprag d tilts rightward against the spring e and becomes idling (Fig. 5A), and the q of the outer ring a or the inner ring b,
During the rotation in the q'direction, the sprags d are brought into mesh with each other to be in a torque transmission state (Fig. 5B).

[Problems to be Solved by the Invention]

By the way, in the above structure, the cage c is provided separately from the outer ring a or the inner ring b, and the sprag d as the torque transmitting member and the spring e are incorporated into the cage c, so that the structure is complicated. It has a drawback that the manufacturing process requires complicated labor and the operation becomes unstable depending on the state of the spring e.

In view of the above points, the present invention provides a housing for a torque transmitting member in a cage made of synthetic resin and a movable supporting member on one side of the housing so that the movable supporting member allows the torque transmitting member to move in one direction. The torque transmission member is held at a predetermined position while allowing the escape of the housing while preventing the torque transmission member from falling out of the accommodation chamber, thereby ensuring the simplification of the structure and the stability of the operation.

[Means for Solving the Problems]

In order to achieve the above object, in the present invention, a holder for a torque transmission rolling element including a torque transmission direction restricting ring and a synthetic resin retaining ring is provided in the main ring, and the synthetic resin retaining ring is accommodated. A movable support member having an arcuate sliding contact surface for the torque transmitting rolling element is integrally provided on one side in the circumferential direction of the chamber, and the torque transmitting rolling element is provided on the inner peripheral side of the accommodating chamber via the arcuate sliding contact surface. Of the main ring is held in a state of partially protruding from the opening of the main ring, and the movable support member holds the rolling element for torque transmission in a position where the rolling element for torque transmission contacts the engaging surface of the torque transmission direction regulating ring. At the same time, a configuration is adopted in which a torque transmission state is set, and the torque transmission rolling element is allowed to escape from the engagement surface when the main ring rotates in the reverse direction to set the idling state.

[Action]

Immediately after inserting the shaft into the main ring, the plurality of torque transmitting rolling elements move the engaging surface of the torque transmitting direction restricting ring while retracting the movable support member and maintain the state of being pressed against the peripheral surface of the shaft. .

〔Example〕

In FIG. 1, reference numeral 1 denotes a synthetic resin main ring as an outer ring constituent member, an annular side wall 1a having an L-shaped cross section is continuously provided on the inner circumference of one side, and an annular side wall acting as a pressing lid on the other side. The side wall 1b is fixed by fitting the annular projection 1c and the annular groove 1d, and an annular chamber 1e is formed in the inner peripheral wall of the main ring 1.

In the annular chamber 1e, a cage A for the steel ball 2 as a rolling element for torque transmission is provided. The cage A includes a torque transmission direction regulating ring 3 made of a sintered metal and a synthetic resin retaining ring 4 provided in the ring 3.

The torque transmission direction restriction ring 3 is divided into six equal parts in the circumferential direction,
Six fixing recesses 3a are formed on the outer peripheral portion for fitting with the protrusions (not shown) of the main ring 1, and tangential lines and 8 are formed on the inner peripheral portion.
Six engaging surfaces 3b for the steel balls 2 having an angle of ° are formed.

The synthetic resin holding ring 4 has a partition wall in the middle of the axial direction in which the R1.1 mm accommodating chambers 4a, 4a corresponding to the engaging surfaces 3b of the torque transmission direction restricting ring 3 and continuous with the engaging surfaces 3b are formed. Two chambers are provided through 4b, and an opening 4c is formed on the inner peripheral side facing the center facing the engagement surface 3b.
A steel ball 2 having a diameter of 1.58 mm is held in each of the accommodating chambers 4a in a state of partially protruding from the opening 4c. A flexible support wall as a movable support member for the steel ball 2 is provided with a hole 4d of φ0.8 mm on one side in the circumferential direction of the accommodation chamber 4a, that is, on the inner peripheral side where the engagement surface 3b is expanded. 4e is provided. The base portion 4f of the flexible supporting wall 4e has a narrow width of 0.3 mm, and has a free end surface having an arcuate sliding contact surface 4g that matches the steel ball 2, and the portion of the arcuate sliding contact surface 4g on the ring center side is made of steel. The ball 2 is supported to prevent the ball 2 from falling off the opening 4c.

In the above structure, when used, the shaft 5 as the inner ring constituting member is inserted into the main ring 1 as the outer ring constituting member, and the steel ball 2 has the engaging surface of the torque transmitting direction regulating ring 3 at both ends X and Y in the diametrical direction. 3b and the shaft 5 are brought into contact with each other.

In this case, when the main ring 1 is normally rotated in the p direction, the steel ball 2 escapes from the engagement surface 3b of the torque transmission direction restricting ring 3 via the flexible support wall 4e, so that the idling state occurs and the ring 1 moves in the q direction. Steel ball 2 when rotated in reverse
Engagement occurs and a torque is transmitted.

In the embodiment of FIG. 3, the cutout space 4e ″ is formed to form the flexible support wall 4e ′ when the wall between the accommodating chambers 4a and 4a is thick.

In the embodiment shown in FIG. 4, the main ring as an outer ring constituting member is provided on the synthetic resin roller 1 '.

〔The invention's effect〕

As described above, according to the present invention, a retainer for a torque transmitting rolling element including a torque transmitting direction restricting ring and a synthetic resin retaining ring is provided in the main ring, and the retainer for the torque transmitting direction is provided in the circumferential direction of the accommodation chamber of the synthetic resin retaining ring. A movable support member having an arcuate sliding contact surface for the torque transmitting rolling element is integrally provided on one side, and the torque transmitting rolling element is partially provided from the opening on the inner peripheral side of the accommodation chamber via the arcuate sliding contact surface. The movable support member holds the rolling element for torque transmission in a position in which the rolling element for torque transmission abuts on the engaging surface of the torque transmission direction restricting ring, so that the main ring is in a torque transmission state during forward rotation. In addition, since the rolling element for torque transmission is allowed to escape from the engaging surface to make the idling state when the main ring rotates in the reverse direction, a movable support integrated with the synthetic resin holding ring is provided. From the opening in the member The entire structure is simplified and the main ring is easy to manufacture by preventing the Luke transmission rolling element from falling off and holding the torque transmission rolling element in a position where it abuts against the engaging surface of the torque transmission direction regulation ring. Immediately after inserting the shaft into the shaft, the plurality of torque transmitting rolling elements move the engaging surface while retracting the supporting member and maintain the state of being pressed against the peripheral surface of the shaft, thereby facilitating the assembly. Yes,
The arcuate sliding contact surface stabilizes the operation of the torque transmitting rolling element and has durability.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a sectional view of an embodiment of the present invention, FIG. 2 is an enlarged sectional view taken along line II-II of FIG. 1, and FIG. 3 is another embodiment of a cage. FIG. 4 is a sectional view showing another embodiment of the main ring, and FIGS. 5 (a) and 5 (b) are explanatory views of a conventional example. 1, 1 '... main ring, 2 ... rolling elements for torque transmission, 3 ... torque transmission direction regulating ring, 4 ... synthetic resin holding ring,
4a ... accommodation chamber, 4e ... movable support member, 4g ... arc-shaped sliding contact surface.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-53-125553 (JP, A) real-opening Sho-56-131035 (JP, U) real-opening Sho-54-166336 (JP, U) real-opening Sho-58- 142424 (JP, U) JP 56-7530 (JP, B1) JP 43-20818 (JP, B1) JP 40-33374 (JP, Y1)

Claims (1)

[Claims] 1. A retainer for a torque transmitting rolling element comprising a torque transmitting direction regulating ring and a synthetic resin retaining ring is provided in the main ring, and the retainer made of synthetic resin is provided at one side in the circumferential direction of a housing chamber. A movable support member having an arcuate sliding contact surface for the torque transmitting rolling element is integrally provided, and the torque transmitting rolling element is partially projected from the opening on the inner peripheral side of the accommodation chamber via the arcuate sliding contact surface. In this state, the movable support member holds the torque transmission rolling element in a position where it abuts on the engagement surface of the torque transmission direction regulating ring to bring it into a torque transmission state when the main ring rotates forward. A one-way clutch, wherein the torque transmission rolling element is allowed to escape from the engagement surface when the main ring rotates in the reverse direction, and the one-way clutch is in a idling state.