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Friction type overrunning clutch

An overrunning clutch, friction type technology, applied in clutches, one-way clutches, mechanical equipment, etc., can solve the problems of structural design, unlocking performance and bearing capacity limitation, non-self-locking, large slip angle, etc. Various performance indicators, low cost, easy unlocking effect

Active Publication Date: 2012-10-31
CHONGQING DYNRUN MACHINERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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 kind of one-way overrunning clutch based on chute shaft pin and cone surface friction pair type, except that this clutch has similar shortcoming with document CN2175321Y, There is also the defect of low carrying capacity
[0007] Documents CN 201747821 U and CN 101936346 A disclose a "space wedging type friction overrunning clutch", as described in the document: "designed according to a new technical principle", a On the one hand, the principle of "new technical principle" is not clarified in the literature; the literature selects the self-locking structure range of the friction pair of the guide mechanism, so that when the overrunning clutch transmits torque by self-locking, the axial force generated is far greater than the transmitted torque. When unlocking, the additional wedging force must be overcome first, so the overrunning clutch in this document has great limitations in terms of structural design, unlocking performance and improvement of carrying capacity.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] figure 1 Provided is a simplified schematic diagram of a structure of the friction overrunning clutch of the present invention, and the representation in the figure is explained as follows:

[0039] X is the rotation axis of this embodiment.

[0040] 1 is the inner ring (or inner ring assembly), which uses an integral inner ring, 1-2 is the conical surface (truncated cone surface) directly processed on the outer peripheral surface of the inner ring, 1-1 is the direct The external threads processed on the outer peripheral surface of the inner ring are also arranged with limiting ring grooves 1-3 on the outer peripheral surface of the inner ring, and straight splines are directly arranged on the inner peripheral surface of the inner ring to be able to connect with the rotating shaft and the like.

[0041]2 is the outer ring (or called the outer ring assembly), which is also an integral outer ring, 2-2 and 2-5 are the conical surfaces (truncated cone surfaces) arranged di...

Embodiment 2

[0069] Example 2: figure 2 What is shown is an overrunning clutch with a large load capacity, and the description of the representation in the figure is as follows:

[0070] X is the rotation axis of this embodiment.

[0071] Inner ring 1, including the inner ring and three conical (truncated conical) friction surfaces 1-1, 1-2, and 1-3 connected to the inner ring, constitutes the inner ring assembly, and the conical friction surface and the inner ring They are respectively connected by movable straight splines to form an integral structure and rotate synchronously.

[0072]Outer ring 2 includes the outer ring and three conical (truncated cone) friction surfaces connected to the outer ring, 2-1, 2-2, and 2-3, which constitute the outer ring assembly, and the conical friction surface and the outer ring are also Connected by movable straight splines, an integral structure is formed and rotates synchronously; an internal thread 21 is directly processed on the inner surface of ...

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PUM

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Abstract

The invention relates to a friction type overrunning clutch, belonging to mechanical transmission basic parts. A friction ring is respectively connected with an inner ring and an outer ring, both of which can rotate around a same axis, in a matching manner through a boosting transmission mechanism and a truncated-cone-shaped work friction pair. The friction type overrunning clutch is remarkably characterized in that both the boosting transmission mechanism and the truncated-cone-shaped work friction pair work in a parameter range in which the boosting transmission mechanism and the truncated-cone-shaped work friction pair cannot be locked independently by self, the boosting transmission mechanism is located in a normally-meshed state, and the work pair with matched conical faces 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 truncated-cone-shaped work 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, which belongs to a basic functional component widely used in mechanical transmission. [0002] Background technique [0003] Existing friction type overrunning clutch technology, the most widely used is the roller type overrunning clutch and the sprag type overrunning clutch which utilizes the principle of inclined wedge tightness. 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 automatic compensation ability for wear. 4. The resistan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16D41/06
Inventor 罗俊
Owner CHONGQING DYNRUN MACHINERY