CN2177126Y

CN2177126Y - Peach shape wedge single way super clutch without inner ring

Info

Publication number: CN2177126Y
Application number: CN 93211282
Authority: CN
Inventors: 孔庆堂; 王修彬
Original assignee: Individual
Current assignee: Individual
Priority date: 1993-05-05
Filing date: 1993-05-05
Publication date: 1994-09-14
Anticipated expiration: 2003-05-05

Abstract

The utility model relates to a peach shape wedge single way overrunning clutch without an inner ring. The utility model is composed of an outer ring, peach shape wedges, end closures, and springs. The peach shape wedges are arranged on the circumference of the inner roller path of the outer ring regularly. The cross section of each wedge is composed of an upper straight line segment and a plurality of circular arcs, and the centers of two working circular arcs Rn and Rw are eccentric. Both ends of each peach shape wedge are respectively provided with a spring along the roller path direction, and two end faces of the outer ring are respectively compacted with one end closure. The structure of the peach shape wedge single way overdrive clutch is simple. Compared with the existing the roller type clutch, when the external dimensions are the same, the load bearing torque of the utility model can reach to nine times to thirteen times.

Description

Peach shape wedge single way super clutch without inner ring

The utility model relates to a kind of free wheel device, particularly not with the interior peach shape unidirectional wedge-typed overrunning clutch that encircles.

The free wheel device that in all kinds of mechanical transmission such as lathe, automobile, light industry, mine, metallurgy, uses at present, mainly be click formula clutch and roller-type overrunning clutch, on some novel mechanicals, bring into use a kind of fist shape free wheeling sprag clutch in recent years.

Click formula clutch and roller-type overrunning clutch, these two kinds of clutch usabilities and technology capability are all poor, promote the use of and are subjected to certain limitation.Ratchet, pawl type free wheel device are when work, owing to have only one or two tooth to bear torque on the ratchet, it is less therefore to bear torque.During driving torque, the ratchet revolution is crossed tooth pitch could transmitting torque, and therefore, it is less to bear torque.But simultaneously neither any position transmitting torques all, and the sound is arranged during " surmounting " transmission, use inconvenience.

Roller-type overrunning clutch, functional reliability is poor, and can not be too many because of the quantity of placing roller in raceway, thereby bearing capacity is low; The processing of star-wheel is difficulty relatively, requires working grading to want accurately, places the hole depth of spring and wants consistent, and these add and are not easy man-hour to guarantee, thereby manufacturability is poor.More than two kinds of free wheel devicees, though mechanically also using many because above-mentioned shortcoming in use is subjected to certain limitation.As for fist shape Wedge type over running clutch, because inside and outside two work circular arc width dimensions are more or less the same, be difficult for often getting wrong respectively in processing and device timing, main is to require radial dimension less, under the situation of ring, very difficult during the dress axle in not having.This clutch is unsuitable for and is made into the structure of not having interior ring.

Order of the present utility model is to provide a kind of compact structure, and the high-mechanic torque can both transmitting torque at any corner, silent, and it is low to consume energy, and highi degree of accuracy, the peach shape Wedge type over running clutch of long-life.

The utility model realizes that by following manner it is made up of outer shroud 1, peach shape voussoir 2, end cap 3 and spring 4, is arranged with peach shape voussoir 2 between outer shroud 1 and inner race regularly.The section of peach shape voussoir 2 is made up of straightway and a plurality of circular arc, and the center of two work circular arc R n and Rw is eccentric.A spring 4 is respectively placed at the two ends of peach shape voussoir 2, and an end cap 3 is equipped with at the voussoir two ends respectively.

Since voussoir in two raceways relatively inner ring axis shape at a tilt angle, motionless when outer shroud, when sense of rotation of interior hoop was rotated, wedge height was less than the gap between the inside and outside ring, thus in ring can rotate, be in " surmounting " state at this moment.When another direction of interior hoop is rotated, wedge height greater than the gap between the inner and outer rings by wedging, thereby braking and drive the outer shroud transmitting torque.

Following preference elaborates to the utility model in conjunction with the accompanying drawings, but does not limit scope of the present utility model.

Fig. 1 is the plan view of the utility model structure;

Fig. 2 is the side view of Fig. 1;

Fig. 3 is a work schematic representation of the present utility model.

Place peach shape voussoir 2 between outer shroud 1 and the rotating shaft, the section configuration of voussoir as shown in Figure 3, outer work garden arc radius is Rw, inner working face garden arc radius is Rn, voussoir is pressed certain orientation between raceway regularly arranged, and be covered with whole raceway.A spring 4 is respectively placed at the two ends of voussoir, and an end cap 3 is equipped with at the voussoir two ends respectively, when ring in the clutch is that the center is when counterclockwise rotating with 0, because outer shroud 1 maintains static, under the frictional force action of the radial pressure of spring 4 and inner race and voussoir, make voussoir enclose the revolution of B point clockwise direction, because the cross-section size H1 of voussoir 2 is greater than the radial distance (because due to off-centre of Rw, Rn) of inner and outer rings raceway, voussoir 2 is braked interior ring by wedging thereby reach self-locking.When interior ring clockwise rotated, voussoir 2 made voussoir 2 cross-section size H around the revolution counterclockwise of B point ₂The position be between the inside and outside raceway because H ₂Less than its radial clearance, so voussoir 2 is motionless by wedging, be in " surmounting " state, interior ring just can freely rotate in a clockwise direction.

The utility model has the advantages that: (1) is compared with existing roller clutch, in the measure-alike situation of profile, can place the voussoir of a greater number, and the voussoir radius of curvature is big, can transmit bigger torque (torque be roller 8-12 doubly); (2) compare with fist shape Wedge-type, more compact structure can manufacture no inner ring pattern, and transmitting torque is bigger, and applicable surface is extremely wide. But equal transmitting torque when any corner; (3) processing is simple, and precision guarantees that easily processing cost can reduce; (4) this clutch configuration compactness, dependable performance, the life-span is long, uses more convenient.

Claims

1, a kind of not with the peach shape voussoir mono-directional overrun clutch of interior ring, it is made up of outer shroud 1, peach shape voussoir 2, end cap 3 and spring 4, it is characterized in that:

(1) is arranged with peach shape voussoir 2 between outer shroud 1 and inner race regularly.

(2) section of peach shape voussoir 2 is made up of straightway and a plurality of circular arc, and two work circular arc R _nWith R _wThe center be eccentric.

(3) spring 4 is respectively placed at the two ends of peach shape voussoir 2, and an end cap 3 is equipped with at the voussoir two ends respectively.