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Tri-state overrunning clutch

A technology of overrunning clutches and working surfaces, applied in clutches, one-way clutches, mechanical equipment, etc., can solve problems such as affecting service life, wear, and single function

Active Publication Date: 2008-12-24
BYD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, in the existing overrunning clutches, the overrunning state and wedging state of the overrunning clutch are realized through the relative rotation between the inner and outer rings, and the clutch itself has no additional mechanism to control the working position of the sprags, so there are The problem is that the overrunning clutch only has a one-way overrunning state and a one-way wedging state, and has a single function
In some specific construction machinery applications, when the overrunning clutch is required to rotate at high speed, the driving part and the driven part are completely separated, that is, the driving part and the driven part can not interfere with each other, and the one-way overrunning of the overrunning clutch limits the this function
At the same time, when the clutch is in the high-speed overrunning state, the wedges are in contact with the inner and outer rings, so there are problems of wear and heat, which will affect its service life

Method used

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Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0020] figure 1 is a sectional view of the three-state overrunning clutch according to the first embodiment of the present invention. The three-state overrunning clutch includes an outer ring 1, an inner ring 2, and a plurality of sprags 3 located between the outer ring 1 and the inner ring 2, which are located between the outer ring 1 and the inner ring 2 and hold the plurality of wedges through holding holes. A cage 4 for the wedge 3 . The first working surfaces 31 of the plurality of wedges 3 permanently contact the working surface of the outer ring 1 , and the second working surfaces 32 of the plurality of wedges 3 can contact or leave the inner ring 2 through rotation. working surface.

[0021] Specifically, the working surface of the outer ring 1 has a plurality of arc grooves 11, and each arc groove 11 is matched with the first working surface 31 of a corresponding wedge 3, and the first The working surface 31 is held in the arc groove 11 .

[0022] Such as Figure...

no. 2 example

[0033] figure 2 Shown is a three-state overrunning clutch according to a second embodiment of the invention. Compared with the above-mentioned first embodiment, the difference is that: an arc groove 21 is provided on the working surface of the inner ring 2, and the first working surface 31 of the wedge 3 is also held in the arc groove 21, so that by holding The frame 4 can rotate the wedge 3 around its first working surface 31, and its working method is the same as that of the above-mentioned first embodiment.

[0034] In addition, in this second embodiment, the pre-tension spring 5 can simply use a contracted coil spring, the coil spring 5 passes through the through hole provided in the wedge 3, and the first working surface 31 of the wedge 3 Firmly held in the arc groove 21, and through the design of the position of the through hole on the wedge 3, the pre-tightening spring 5 can make the wedge 3 have a tendency to rotate towards the wedging direction.

no. 3 example

[0036] image 3 Shown is a three-state overrunning clutch according to a third embodiment of the present invention. Compared with the first embodiment above, the difference is that the cage 4 is a double cage structure, including an outer cage 41 and an inner cage 42 . Through this double cage structure, the bearing capacity of the three-state overrunning clutch of the present invention can be improved and its service life can be prolonged.

[0037] Wherein the plurality of tabs 6 protruding outward in the axial direction from the inner cage 42 are the same as the first embodiment. When the inner cage 42 rotates relative to each other, the outer cage 41 can rotate correspondingly with the wedge 3 without affecting the rotation of the wedge 3 .

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PUM

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Abstract

The invention relates to a tristate superior clutch comprising an outer ring, an inner ring, a plurality of wedgy blocks positioned between the outer ring and the inner ring and a retaining frame which is positioned between the outer ring and inner ring and used for retaining the wedgy blocks; a first working face of the wedgy blocks permanently contacts one of the working faces of the outer ring and the inner ring and can make a second working face of the wedgy blocks contact or leave the other working face of the working faces of the outer ring and the inner ring through rotation. Through controlling the wedgy blocks to fully leave the other working face, the outer ring and the inner ring can freely rotate in a positive direction and a negative direction, thereby obtaining a bidirectional separation working state of the tristate superior clutch; through controlling the wedgy blocks to restore a common superior wedging working position, an unidirectional superior working state or a unidirectional wedging working state of the tristate superior clutch is obtained.

Description

technical field [0001] The invention relates to an overrunning clutch, in particular to a three-state overrunning clutch, which can control the inner ring and the outer ring of the overrunning clutch to be completely disengaged from each other so as to freely rotate in forward and reverse directions. Background technique [0002] An overrunning clutch, also known as a one-way clutch or a one-way bearing, is a device that can only transmit torque in one direction of rotation. Existing overrunning clutches mainly include roller type overrunning clutches and sprag type overrunning clutches. [0003] As an example of a sprag type overrunning clutch, CN 2476675Y (or CN 1430000A) discloses a kind of overrunning clutch with double cages, the overrunning clutch includes an inner ring and an outer ring, and a plurality of Wedges, and these wedges are held by the holding holes opened in the double cage (including the inner cage and the outer cage) between the inner and outer rings. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16D41/063
Inventor 王传福罗红斌罗如忠任毅郭松岳杨胜麟陈广全牛茹茹
Owner BYD CO LTD
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