CN1069121C - Chain link type monoway and doubleway overrunning clutch - Google Patents

Abstract

The invention relates to a chain ring type single and two-way overrunning clutch. The clutch is composed of an outer casing, an inner core, a control key, a chain ring and other parts. The chain ring and the control key are arranged between the jacket and the inner core to form a self-locking mechanism. The two ends of the link form an overlapping shape, and a rectangular through hole is arranged at the overlapping point, and one end of the control key is inserted into the rectangular hole, and the other end is placed in the trapezoidal groove of the overcoat. Two sets of one-way overrunning clutches are reversely installed between the same inner core and outer cover to form a two-way overrunning clutch. The overrunning clutch designed by the invention is suitable for pulsating continuously variable transmission devices and other occasions.

Description

Chain ring type single, two-way overrunning clutch

The invention relates to a chain ring type overrunning clutch, which belongs to the technical field of machinery.

Existing overrunning clutch, preferably form has roller type and sprag type. They all use the principle of inclined wedge tightness. The applicant once applied for a utility model patent named "chain-ring type overrunning clutch" in 1995, and the patent number is 95221959.X, and its structure is as shown in Figure 1. In Fig. 1, 1 is a driving disc, 2 is an extension spring, 3 is a roller, 4 is a control key, 5 is an adjustment needle, 6 is a chain ring, 7 is an inner core, and 8 is a friction-reducing needle roller. The deficiencies in the technology of the above-mentioned overrunning clutch are that the form of the driving disc is too limited;

The purpose of the present invention is to design a single- and two-way dual-purpose chain-ring type overrunning clutch, improve the structure of the drive plate, cancel the needle roller, and realize two kinds of overrunning functions in one and two directions.

The chain ring type overrunning clutch designed by the present invention is made up of an outer cover, an inner core, a control key and a chain ring. The chain link is placed between the jacket and the inner core. The chain link is composed of a chain head, one or more chain links and a chain tail. One end of the chain head is hooked to each other, and the other end of the chain head has a rectangular opening. Holes, one end of the chain tail and the chain links are hooked to each other, and the other end of the chain tail is also provided with a rectangular through hole, and the chain links are hooked to each other. One end of the control key is inserted into the rectangular through hole at the end of the chain head and the chain tail at the same time, so that the chain head and the chain tail overlap, and the other end of the control key is inserted into the trapezoidal groove of the overcoat. Adjustment pins are arranged at the joints between the chain links. A pre-tension spring is fixed on the overcoat, and the other end of the pre-tension spring is fixed with the chain link. A roller is placed in the rectangular through hole where the chain head and the chain tail overlap.

The present invention has designed a kind of two-way overrunning clutch again, is made up of two sets of chain rings of outer cover, inner core and control key. Two sets of chainrings and control keys are placed in reverse between the outer shell and the inner core. The chain link is composed of a chain head, one or more chain links and a chain tail. One end of the chain head and the chain links are hooked to each other, and the other end of the chain head has a rectangular through hole. The other end of the chain tail is also provided with a rectangular through hole, and the chain links are hooked with each other. One end of the control key is inserted into the rectangular through hole at the end of the chain head and the chain tail at the same time, so that the chain head and the chain tail overlap, the other end of the control key is inserted into the trapezoidal groove of the jacket, and inserted into the unlocking groove on the outer circle of the chain ring. A claw.

The single and two-way overrunning clutch designed by the present invention has simple structure, convenient processing, and has the following advantages:

1. The transmission capacity is large, which is about 10 to 20 times larger than that of the ordinary roller type;

2. The reverse opening force is small, and there is no heat during pulsating work;

3. Smooth switching without impact noise;

4. Long durability and repairability;

5. The two-way overrunning clutch has a large locking force, no empty space, and long durability.

Description of drawings:

Fig. 1 is a schematic structural diagram of the prior art.

Fig. 2 is a structural schematic diagram of the chain-ring type one-way overrunning clutch designed by the present invention.

Figure 3 is a schematic diagram of the overlapping of the chain head and the chain tail.

Fig. 4 is a schematic diagram of adding a preload spring to the overrunning clutch shown in Fig. 2 .

Fig. 5 is a structural schematic diagram of the chain-ring type two-way overrunning clutch designed by the present invention.

Fig. 6 is a cross-sectional view along line A-A of Fig. 5 .

Fig. 7 is a B-B sectional view of Fig. 5 .

Below in conjunction with accompanying drawing, introduce the content of the present invention in detail. In Fig. 2～Fig. 6, 9 is an adjustment pin, 10 is a chain tail, 11 is a roller, 12 is a control key, 13 is an outer cover, 14 is a chain head, 15 is an inner core, 16 is a chain link, and 17 is a rectangular channel. Hole, 18 is the unlocking claw, and 19 is the unlocking groove, and 20 is the preload spring.

As shown in Figure 2, the chain ring type overrunning clutch of the present invention design, comprises inner core 15, control key 12, chain ring and overcoat 13 and is formed. The chain link is placed between the jacket and the inner core. The chain link is composed of a chain head 14, one or more chain links 16 and a chain tail 10. One end of the chain head 14 is hooked with the chain links, and the other end of the chain head There is a rectangular through hole 17, one end of the chain tail 10 is hooked with the chain link, and the other end of the chain tail has a rectangular through hole 17, as shown in Figure 3 . The chain links are hooked to each other. One end of control key 12 is inserted in the rectangular through hole 17 of chain head and chain tail end simultaneously, makes chain head and chain tail overlap, and the other end of control key is inserted in the trapezoidal groove of overcoat. Adjustment pins 9 are arranged at the joints between the chain links. A pre-tension spring 20 is fixed on the overcoat, and the other end of the pre-tension spring is fixed with the chain link. In the rectangular through hole where the chain head and the chain tail overlap, a roller 11 is placed.

When the overcoat 13 rotates counterclockwise as shown in Figure 2 to push the control key 12, the control key pushes the roller 11, and then pushes the chain head 14, so that the entire chain rings are mutually tightened and hold the inner core 15 to enter the self-locking state . When the overcoat rotated clockwise, the control key loosened the chain ring and could freely rotate on the inner core 15 to realize overrunning, which is a one-way overrunning clutch.

In order to eliminate the backlash of the forward and reverse movement, a preload spring 20 can be added in any way at any position between the jacket and the chain ring, so that the jacket and the chain ring are mutually preloaded, as shown in FIG. 4 .

As shown in Figure 5, the present invention has designed a kind of two-way overrunning clutch again, is made up of overcoat 13, inner core 15, two cover chain rings and control key. Two sets of chainrings and control keys are placed in reverse between the outer shell and the inner core. Same as the above-mentioned one-way overrunning clutch, the chain ring is composed of a chain head, one or more chain links and a chain tail. One end of the chain head is hooked to each other, and the other end of the chain head has a rectangular through hole. One end of the tail and the chain links are hooked to each other, and the other end of the chain tail is also provided with a rectangular through hole, and the chain links are hooked to each other. One end of the control key is inserted into the rectangular through hole at the end of the chain head and the chain tail at the same time, so that the chain head and the chain tail overlap, and the other end of the control key is inserted into the trapezoidal groove of the overcoat. A finger is inserted into the unlocking slot on the outer circle of the chain ring.

Fig. 5, Fig. 6 and Fig. 7 are that two sets of one-way overrunning clutches are reversely installed between the same inner core and the outer cover to realize two-way interlocking. The unlocking groove 19 that passes through is opened at the corresponding positions of the two sets of chain rings, and an unlocking finger 18 is inserted to realize two-way overtaking. That is to say, when the jacket is used as the output terminal, when the forward and reverse motions are input from the claw, the jacket can output the same movement with the claw, while the inner core can not move, which is the so-called two-way overriding. When the claw is loosened, the outer cover will still be integrated with the inner core and locked tightly to each other. This two-way overrunning clutch can achieve large locking force and no lost space. It can be installed at the input end of the ball screw to prevent the ball screw from reversing, and it can also be used in other occasions with the same requirements.

Claims (5)

1. a chain ring type free wheel device comprises inner core, control key, chain link, it is characterized in that also comprising overcoat; Described overcoat is circular, described chain link places between overcoat and the inner core, chain link is made up of first-in-chain(FIC), one or more chain links and last-of-chain, mutual clasp joint between one end of first-in-chain(FIC) and the chain link, the other end of first-in-chain(FIC) has rectangular through holes, mutual clasp joint between one end of last-of-chain and the chain link, the other end of last-of-chain has rectangular through holes, mutual clasp joint between the chain link; One end of described control key inserts in the rectangular through holes of first-in-chain(FIC) and chain tail end simultaneously, makes first-in-chain(FIC) and last-of-chain overlap joint, and the other end of control key inserts in the dovetail groove of overcoat.

2. free wheel device as claimed in claim 1 is characterized in that the mutual clasp joint place between the wherein said chain link is provided with adjusting pin.

3. free wheel device as claimed in claim 1 or 2 is characterized in that wherein said outer putting is fixed with preloading spring, and the other end and the chain link of preloading spring fix.

4. free wheel device as claimed in claim 1 or 2 is characterized in that placing a roller in the rectangular through holes of wherein said first-in-chain(FIC) and last-of-chain overlap joint.

5. a double rolling key clutch comprises overcoat, inner core, it is characterized in that also comprising two cover chain links and two cover control keys; Described two cover chain links and two cover control keys oppositely are positioned between overcoat and the inner core, every cover chain link is made up of one or more chain links of first-in-chain(FIC) and last-of-chain, mutual clasp joint between one end of first-in-chain(FIC) and the chain link, the other end of first-in-chain(FIC) has rectangular through holes, mutual clasp joint between one end of last-of-chain and the chain link, the other end of last-of-chain has rectangular through holes, mutual clasp joint between the chain link; One end of described control key inserts in the rectangular through holes of first-in-chain(FIC) and chain tail end simultaneously, makes first-in-chain(FIC) and last-of-chain overlap joint, and the other end of control key inserts in the dovetail groove of overcoat, inserts a pusher dog in the groove of unblanking of chain link cylindrical.

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