Conical-surface friction type overrunning clutch

Abstract

The invention relates to a conical-surface friction type overrunning clutch, belonging to mechanical transmission basic parts. A first intermediate ring and a second intermediate ring are respectively connected with an inner ring and an outer ring, which can rotate around a same axis, in a matching manner through a boosting transmission mechanism and a conical-face friction pair. The conical-surface friction type overrunning clutch is remarkably characterized in that both the boosting transmission mechanism and the conical-face friction pair work in a parameter range in which the boosting transmission mechanism and the conical-face friction pair cannot be locked independently by self, the boosting transmission mechanism is located in a normally-meshed state, and the conical-face friction pair applies initial pressure through an elastic pre-tightening assembly; and when tangential outer forces in different directions exist between the inner ring and the outer ring, the conical-face friction pair is made slide and rotate or keep a static state through the effect of the boosting transmission mechanism, so that the overrunning function and the self-locking function of the overrunning clutch are realized. According to the invention, by means of adjusting design parameters, the overload trackslip protection function of the overrunning clutch is realized conveniently.

Description

technical field [0001] The invention relates to an overrunning clutch device in the field of mechanical power transmission, in particular to a conical surface friction type overrunning clutch, which belongs to a basic functional component widely used in mechanical transmission. [0002] Background technique [0003] Existing overrunning clutch technology, two kinds of roller type overrunning clutches and sprag type overrunning clutches utilizing inclined-plane wedging principle are the most widely used. The main defects of these two types are: 1. All contacts are discrete high-pair contacts, and the contact stress is very large when wedging is tight, resulting in very small bearing capacity, fast wear of the contact pairs, and short life. 2. Since it is a discrete contact pair, it is easy for the discrete parts to fail to work synchronously, and it is very easy to cause local damage and failure failures that cannot be self-locked or deadlocked. 3. There is almost no automa...

AI Technical Summary

Problems solved by technology

The main defects of these two types are: 1. All contacts are discrete high-pair contacts, and the contact stress is very large when wedging is tight, resulting in small bearing capacity, fast wear of contact pairs, and short life.

2. Because it is a discrete contact pair, it is easy for the discrete parts to fail to work synchronously, and it is very easy to cause local damage and failure failures that cannot be self-locked or deadlocked.

3. Almost no wear and tear automatic compensation ability

4. The resistance of transcending the state is large and the efficiency is not high

5. After wedging tight, a larger unwedging force is required

6. The sliding angle is relatively large

7. The structure is complex, the number of parts is large, the requirements for the consistency of materials and manufacturing are very high, and the cost is high

[0006] Document CN2479288Y discloses a one-way overrunning clutch based on chute shaft pin and conical surface friction pair. In addition to the similar shortcomings of document CN2175321Y, this clutch also has the defect of low load-carrying capacity

[0007] Documents CN 201747821 U and CN 101936346 A disclose a "spatial wedging type friction overrunning clutch", as described in the documents: "Designed according to a new technical principle", on the one hand, it does not clarify what the "new technical principle" is in the document ; On the other hand, this document selects the self-locking structural range of the friction pair of the guiding mechanism, which greatly limits the structural design, unlocking performance and carrying capacity of the overrunning clutch.

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