CN2108198U

CN2108198U - Pin key freewheel clutch

Info

Publication number: CN2108198U
Application number: CN 90205243
Authority: CN
Inventors: 姜中璋
Original assignee: Individual
Current assignee: Individual
Priority date: 1990-04-21
Filing date: 1990-04-21
Publication date: 1992-06-24

Abstract

The utility model provides a pin key overrunning clutch, relating to an overrunning clutch mechanism. The primary structure is an overgarment (1), a star wheel (2), a half slot (3), a pin key (4), springs (5), a half slot (6), and an eccentric through hole. The utility model is characterized in that a plurality of eccentric through holes 7 are provided with the same distance on the periphery of the overgarment 1; a plurality of half slots are provided with the same distance on the outer periphery of the star wheel of the overrunning clutch; the pin key 4 and the spring 5 are arranged in the eccentric through hole 7. When the pin key rotates as a driving part, the pin key can be pushed out by the spring and get connected with the half slot on the star wheel. So the star wheel rotates in the same direction of the overgarment.

Description

Pin key freewheel clutch

The utility model relates to a kind of free wheel device, particularly with " the pin key free wheel device " of juncture transmitting torque.

Existing roller-type overrunning clutch, stable drive, noiseless, but because of its transmission principle be by frictional force with the roller wedging between overcoat and star-wheel, with transmitting torque.So occur skidding easily in the transmission process, and can not bear big load, therefore limited to its application area.The detailed content of relevant free wheel device, the theoretical book of common mechanical and mechanical handbook (as: Chemical Industry Press published " mechanical design handbook " first volume second fascicle in 1987) in introduction is all arranged.

The purpose of this utility model be to provide a kind of improved, with the pin key free wheel device of juncture transmitting torque, it can prevent the skidding that may occur in the transmission process effectively, and can bear big load.

The purpose of this utility model is achieved in that equidistant four (also quantity is established cloth as required) eccentric through-holes of cloth of establishing on the circumferential surface of pin key free wheel device overcoat, equidistant eight (also quantity the is established cloth as required) half slots of cloth of establishing are provided with cylindrical body pin key and spring in above-mentioned eccentric through-hole on the outer peripheral surface of pin key free wheel device star-wheel.When establishing overcoat is driving link in the direction of the clock during the transmission star-wheel, as long as outer pin key and the half slot on the star-wheel that puts in the eccentric through-hole is in corresponding position, pin key is just released by spring and engaged with half slot, and is the transmission star-wheel; And hypothesis is driving link also in the direction of the clock during the transmission overcoat with the star-wheel, and pin key just can be dialled back original position by half slot, and does not reach the transmission purpose.(when making driving link with star-wheel, during the transmission overcoat, need do transmission counterclockwise at this, principle is the same) in addition, based on identical principle, also can adopt along self the cylindrical body of axial motion or spheroid as pin key, at this moment, on the outer peripheral surface of star-wheel, want equidistant cloth circle nest or the ball-and-socket established.

The utility model is because adopted cylindrical body pin key or spheroid pin key as middle transmission body, be that mediator engages transmission, remove to stir half slot (circle nest or ball-and-socket) with pin key, or remove to stir pin key with half slot (circle nest or ball-and-socket), so in engaging transmission process, skidding can not occur, and increase load-carrying ability; Because any part is not set on the star-wheel body,, make simple in structure so star-wheel and axle can be one.

Concrete structure of the present utility model is provided by following examples and accompanying drawing thereof.

Fig. 1 is the structural principle plan view according to pin key free wheel device first embodiment who the utility model proposes;

Fig. 2 is first embodiment's a structural principle left view;

Fig. 3 is second embodiment's a structure principle chart;

Fig. 4 is the 3rd embodiment's a structure principle chart.

Describe details and working condition thereof in detail below in conjunction with Fig. 1 and Fig. 2 according to the concrete structure that the utility model proposes.

Should " pin key free wheel device " comprise an overcoat (1), the overcoat of its shape and function and existing roller-type overrunning clutch (has title " outer shroud ", " annulus ") identical, equidistant establishing is furnished with four eccentric through-holes (7) on the circumferential surface of overcoat in this clutch (1), it is communicated with four half slots (6) of establishing cloth on overcoat (1) inner peripheral surface, the axis parallel of its shaft axis and overcoat (1), in half slot (6), be provided with pin key (4), in eccentric through-hole (7), be provided with spring (5), pin key (4) is as the mediator that engages transmission, it is shaped as cylindrical body, the effect of spring (5) is to promote the radial motion of pin key (4) do along self, to enter engagement positio; In overcoat (1), be provided with its work movingly by the dress star-wheel (2), the star-wheel of its function and existing roller-type overrunning clutch (title " rotor " is arranged) is identical, equidistant eight half slots (3) that are provided with on the outer peripheral surface of the star-wheel in this clutch (2), the axis parallel of its shaft axis and star-wheel (2); The cloth quantity of establishing for eccentric through-hole (7) and half slot (6) can be according to the load capacity setting of required joint transmission; Shown in Fig. 1 and Fig. 2 overcoat (1), pin key (4), the present jointing state of star-wheel (2).

In Fig. 2, indicate the arrow of identical sensing on overcoat (1) and the star-wheel (2) respectively, can be in order to the motion state of this clutch, i.e. working condition to be described: establishing overcoat (1) be driving link, moves in the direction of the clock.At this moment, if the angular velocity of overcoat (1) is more than or equal to the angular velocity of driven member star-wheel (2), pin key (4) just can be seized the opportunity under the effect of spring (5) and corresponding half slot (3) engages, and the moment of torsion of overcoat (1) is passed to star-wheel (2), makes its servo-actuated; After the moment of torsion of overcoat (1) removed, its angular velocity gradually less than the angular velocity of star-wheel (2), just dialled back pin key (4) in the half slot (6) of overcoat (1), to be disengaged by the half slot (3) of star-wheel (2).At this moment, overcoat (1) and star-wheel (2) are just done the revolution of mutual noninterference with speed separately, and what be free wheel device surmounts state (function).When establishing star-wheel (2) for driving link, sense of rotation is with last opposite, and motion state is identical with function, so will not give unnecessary details.

Below in conjunction with Fig. 3 and on to the basis of first embodiment explanation explanation second embodiment's concrete structure.

The circumferential surface of the overcoat in this clutch (1) is provided with the eccentric through-hole (7) of requirement, and needn't establish cloth with half slot (6) in first enforcement, be provided with pin key (4) and spring (5) in the eccentric through-hole (7), the shape of pin key (4) also is a cylindrical body, its self axial motion in the promotion lower edge of spring (5) is to enter engagement positio; In overcoat (1), be provided with star-wheel (2), establish the eccentric circle nest (8) that is furnished with requirement on its outer peripheral surface; Among Fig. 3, the front end of pin key (4) has entered in the eccentric circle nest (8), is in jointing state.The left view of this mechanism do not given show, can understand the mutual alignment relation of its component with reference to Fig. 2, content is substantially the same.

Explanation to this clutch motion state is identical with first embodiment's explanation.

Below in conjunction with Fig. 4 and on to the basis of first, second embodiment explanation simple declaration the 3rd embodiment's structure.

Compare with second embodiment, in fact have only 2 differences.Pin key in this clutch (4) is a spheroid, promptly makes pin key with plain ball; Establish on star-wheel (2) outer peripheral surface and be furnished with eccentric ball-and-socket (9).Other content is identical with second embodiment.The left view of this clutch also do not given show, also can in fact have in label some difference with reference to Fig. 2, other content is identical.

Explanation to this clutch motion state is also identical with first embodiment's explanation.

Claims

1, a kind of free wheel device, particularly with " the pin key free wheel device " of juncture transmitting torque, this clutch has a rotating overcoat (1), the star-wheel (2) that can rotate in the same way with its work is housed in overcoat (1), it is characterized in that, equidistant establishing is furnished with four eccentric through-holes (7) on the circumferential surface of overcoat (1), be provided with cylindrical body pin key (4) and spring (5) in it, equidistant establishing is furnished with eight half slots (3) on the outer peripheral surface of star-wheel, when eccentric through-hole (7) and half slot (3) when being in opposite position, pin key (4) just engages with half slot (3) under the promotion of spring (5), by half slot (3) pin key (4) is dialled back original position when being disengaged.

2, according to right 1 described clutch, it is characterized in that pin key (4) is a spheroid, and on the outer peripheral surface of star-wheel (2) the equidistant eccentric ball-and-socket (9) that is provided with.