CN2234009Y

CN2234009Y - chain-link overrunning clutch

Info

Publication number: CN2234009Y
Application number: CN 95221959
Authority: CN
Inventors: 黄靖远; 堵广智; 于德潜; 黄亭亭; 李尤祥; 马贵龙; 王泽民; 王兴信; 付春林; 王序云; 王久非; 章名伙; 黄梅雨; 王军; 张�浩
Original assignee: Tsinghua University
Current assignee: Tsinghua University
Priority date: 1995-09-22
Filing date: 1995-09-22
Publication date: 1996-08-28
Anticipated expiration: 2005-09-22

Abstract

The utility model relates to a chain-ring type overrunning clutch, which is composed of a drive plate, an inner core, a control key, a chain ring and other components. The chain ring and the control key are arranged between the driving disc 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 formed at the overlapping, one end of the control key is inserted into the rectangular hole, and the other end is placed in the trapezoidal groove of the drive disc. The overrunning clutch designed by the utility model has the advantages of large transmission capacity, small reverse opening force, smooth switching without impact noise, long service life, simple structure, convenient manufacture, and low cost, and is especially suitable for pulsating continuously variable transmission devices.

Description

The chain ring type free wheel device

The utility model relates to a kind of chain ring type free wheel device, belongs to field of mechanical technique.

Existing overrun, form has roller type and wedge block type preferably, all is the principle of utilizing the inclined-plane wedging.The applicant applied in 91 years once that name was called the patent of invention of " flexibility steel band type over running clutch ", and the patent No. is 911089578, and its structure as shown in Figure 1.Among Fig. 1, the 1st, outer shroud, the 2nd, inner core, the 3rd, flexibility steel band, the 4th, lapping plate, the 5th, control key, the 6th, sheet spring, the 7th, S shape spring.The deficiency that above-mentioned free wheel device exists technically, the one, flexibility steel band can not be done too thickly, thereby transmission capacity is restricted, and the 2nd, flexibility steel band distortion after heat treatment is difficult to solve, thereby can not guarantee accuracy of manufacturing.

The purpose of this utility model is a kind of chain ring type free wheel device of design, replaces flexible belt with new chain link structure, realizes self-locking with the flexible belt tribology principle, and function surface is the face contact.Except that making surface contact stress reduces greatly, also have wearing and tearing extremely insensitively, both improved transmission capacity, prolong the working life of clutch again.

The chain ring type free wheel device of the utility model design comprises drive plate, inner core, control key, chain link.Chain link places between drive plate 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 control key inserts in the rectangular through holes of first-in-chain(FIC) and chain tail end simultaneously, and first-in-chain(FIC) and last-of-chain are overlapped mutually, and the other end of control key inserts in the dovetail groove of drive plate.At first-in-chain(FIC), place several pieces of needle rollers on the cylindrical of last-of-chain and chain link, to reduce the surface friction drag between drive plate and the chain link.

Description of drawings:

Fig. 1 is the prior art structural representation.

Fig. 2 is the free wheel device structural representation of the utility model design.

Fig. 3 is first-in-chain(FIC), last-of-chain end construction schematic representation.

Below in conjunction with accompanying drawing, introduce content of the present utility model in detail.Among Fig. 2 and Fig. 3, the 11st, drive plate, the 12nd, preloading spring, the 13rd, roller, the 14th, control key, the 15th, adjusting pin, the 16th, chain link, the 17th, inner core, the 18th, last-of-chain, the 19th, first-in-chain(FIC), the 20th, the rectangular through holes of first-in-chain(FIC) and chain tail end, the 21st, needle roller.Between drive plate 11 and the inner core 17

chain link

18,16,19 is housed, forms self-locking mechanism with control key 4.First-in-chain(FIC) 19 forms the overlap joint shape with last-of-chain 18, has rectangular through holes 20 in lap-joint, and an end of control key 14 inserts in this oblong aperture, and the other end inserts in the dovetail groove of drive plate 11.At first-in-chain(FIC) 19, place several pieces of needle rollers 21 on the cylindrical of last-of-chain 18 and chain link 16, to reduce the surface friction drag between drive plate and the chain link.

When drive plate 11 does that as shown in Figure 2 forward (counterclockwise) rotates and during promotion control key 14, control key 14 promotes last-of-chain 18 by the roller 3 that is arranged in the oblong aperture, thereby whole chain link is held tightly is mutually entered self-locking state, and and then hold inner core 17 tightly, will move and power output.When drive plate 11 was done oppositely (clockwise) rotation, control key 14 got loose chain link, and can freely rotate on inner core 7, realizes surmounting.

For improve forward and reverse motion time locking and sensitivity of opening and the idle running of eliminating forward and reverse switching, be provided with preloading spring 12, one end of preloading spring is fixed on the drive plate, and the other end is fixed on the end of first-in-chain(FIC) 19, plays pretension and eliminates back clearance.Roller 13 is arranged in the oblong aperture of first-in-chain(FIC) and last-of-chain lap-joint, the front of control key, the power transmission of 14 pairs of chain links of control key is concentrated more, reliable.Clasp joint place at chain link 16 and last-of-chain 18 is provided with adjusting pin 15, to guarantee the size coupling of chain link and inner core.

The utility model is simple in structure, and is easy to process, and driving-disc can adopt common iron or cast iron, Inner core is available general steel also, so cost is lower. The utility model also has following technique effect:

1, transmission capacity is big, increases 10-20 times than roller approximately.

2, oppositely opening force is little, need exert oneself hardly, does not generate heat during pulsation work.

3, switch steadily impulse-free noise.

4, the durable life-span long, recoverability is arranged.

5, simple in structure, easily manufactured, cost is low.

Claims

1. A chain ring type overrunning clutch, comprising a drive plate, an inner core, and a control key, and is characterized in that it also includes a chain ring; the chain ring is placed between the drive plate and the inner core, and the chain ring consists of a chain head, a Or more than one chain link and chain tail, one end of the chain head and the chain link are hooked to each other, the other end of the chain head has a rectangular through hole, one end of the chain tail and the chain link are hooked to each other, the chain tail The other end has 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 control key Insert the other end into the trapezoidal groove of the drive disk.

2. The overrunning clutch according to claim 1, characterized in that adjustment pins are provided at the joints between the chain links.

3. The overrunning clutch according to claim 1 or 2, wherein a pre-tension spring is fixed on the drive plate, and the other end of the pre-tension spring is fixed to the chain.

4. The overrunning clutch according to claim 1, wherein a roller is placed in the rectangular hole where the chain head and the chain tail overlap.

5. The overrunning clutch according to claim 4, wherein a roller is placed in the rectangular hole where the chain head and the chain tail overlap.

6. The overrunning clutch according to claim 1, characterized in that several needle rollers are placed on the outer circle of the chain head, chain tail and chain link.

7. The overrunning clutch according to claim 6, characterized in that several needle rollers are placed on the outer circle of the chain head, chain tail and chain link.