CN2481900Y

CN2481900Y - Wedge type low secondary freewheel clutch

Info

Publication number: CN2481900Y
Application number: CN 01248048
Authority: CN
Inventors: 曲秀全; 王延年
Original assignee: Individual
Current assignee: Individual
Priority date: 2001-05-30
Filing date: 2001-05-30
Publication date: 2002-03-13
Anticipated expiration: 2011-05-30

Abstract

The utility model relates to a wedge block type low pair unidirectional overrunning clutch. A wedge shaped groove 3-1 is provided on the inner surface of an outer ring 3 of the utility model, and a wedge block 2 is positioned in the groove. A driving pin 4 and a driving plate 5 are fixed and connected, and the driving pin is inserted in a long hole 2-1 on the wedge block. The driving pin supports up the outer ring through the wedge block, an inner ring 1 is positioned in the outer ring, the central line C of the long hole has an included angle a with the chord line D of the cambered surface 2-2 on the wedge block, and the cambered surface of the tightly wedged wedge block 2 has the surface contact with the outer surface of the inner ring. The clutch has the advantages of large bearing torque, long service life, good transmission and back stopping reliability, simple structure, and low cost, etc.

Description

The wedge block type lower pair overrun clutch

The utility model relates to a kind of mechanically operated clutch that is used for.

The voussoir of traditional higher pair mono-directional overrun formula clutch and the surface of contact of inside and outside ring are higher pair, promptly put the contact of contact-type or line, so its carrying torque is little, shock resistance is poor, and is easy to wear, the life-span is low; ZL992207969 has announced a kind of " fist shape unidirectional wedge-typed overrunning clutch ", though it has the circular arc working surface, realized the face contact, but it respectively is provided with spring at the two ends of voussoir, so it has reliable transmission and the check reliability is relatively poor, shortcoming such as relatively poor, the complex structure of stationarity, cost height during high-speed motion.

The purpose of this utility model is a kind of wedge block type lower pair overrun clutch of design, and it should have, and big, the shock resistance of carrying torque is strong, long service life, reliable transmission and characteristics such as the check reliability is good, stationarity is good, simple in structure during high-speed motion, cost is low.

The utility model is made up of interior ring 1, voussoir 2, outer shroud 3, finger 4, dial 5, the internal surface of outer shroud 3 has the groove 3-1 of wedge shape, voussoir 2 is arranged in groove 3-1, finger 4 is fixedlyed connected with dial 5, finger 4 is inserted among the slotted hole 2-1 on the voussoir 2, finger 4 is propped up outer shroud 3 by voussoir 2, and interior ring 1 is positioned at outer shroud 3.During work, dial 5 and interior ring 1 are respectively the input and output member of motion or power, when dial 5 clockwise rotates with respect to interior ring 1, the finger 4 of dial 5 is just stirred voussoir 2 moves to wedge-shaped impression 2-1 along outer shroud 3 small end, thereby ring 1 and outer shroud 3 make dial 5, voussoir 2, outer shroud 3 and interior ring 1 rotate synchronously in the wedging; When dial 5 rotated counterclockwise with respect to interior ring 1, the finger 4 on the dial 5 was stirred voussoir 2 and is moved to the big end of wedge-shaped impression 3-1 along outer shroud 3, thereby voussoir 2 is separated with interior ring 1, and dial 5, voussoir 2 and outer shroud 3 internally encircled 1 mutually simultaneously and rotated counterclockwise this moment.

The utility model is stirred voussoir 2 by finger 4 and is realized wedging and separate, so its reliable transmission and check reliability are good; Because voussoir 2 is installed in the groove 3-1 of wedge shape, thus even voussoir has certain wearing and tearing, but the function of clutch is not had influence, so it has prolonged the working life of clutch; It has also that big, the shock resistance of carrying torque is strong, good, simple in structure, the low cost and other advantages of stationarity during high-speed motion.

Fig. 1 is the structural representation of the utility model voussoir 2 when being in the wedging state, and Fig. 2 is the structural representation of the utility model voussoir 2 when being in separated state, and Fig. 3 is the A-A sectional view of Fig. 1, and Fig. 4 is the structural representation of voussoir 2.

Embodiment: present embodiment is made up of interior ring 1, voussoir 2, outer shroud 3, finger 4, dial 5, the internal surface of outer shroud 3 is evenly distributed with the groove 3-1 of wedge shape, voussoir 2 is arranged in groove 3-1, finger 4 is fixedlyed connected with dial 5, finger 4 is inserted among the slotted hole 2-1 on the voussoir 2, and finger 4 is propped up outer shroud 3 by voussoir 2.One angle a is arranged between the string of a musical instrument D of cambered surface 2-2 on the center line C of slotted hole 2-1 and the voussoir 2, this just makes the finger 4 that rotates with dial 5 can only stir voussoir 2 and moves at the bottom 3-2 of the wedge-shaped impression 3-1 of outer shroud 3, voussoir 2 can not rotate around finger 4, when voussoir 2 is unclamped and interior ring 1 break away from the rotation of ring 3 in not influencing.Interior ring 1 is positioned at outer shroud 3, the arc shaped surface 2-2 of the voussoir 2 of wedging contacts with the outer surface formation face of interior ring 1, the radius of curvature of arc shaped surface 2-2 is identical with the radius of interior ring 1 outer surface, making the voussoir 2 and the kinematic pair of interior ring 1 like this is lower pair, the clutch of realizing comparable size can bear bigger torque, and its shock resistance, antiwear property improve greatly.

Claims

1, wedge block type lower pair overrun clutch, it is made up of interior ring (1), voussoir (2), outer shroud (3), finger (4), dial (5), the internal surface that it is characterized in that outer shroud (3) has the groove (3-1) of wedge shape, voussoir (2) is arranged in groove (3-1), finger (4) is fixedlyed connected with dial (5), finger (4) is inserted in the slotted hole (2-1) on the voussoir (2), and finger 4 is propped up outer shroud (3) by voussoir (2), and interior ring (1) is positioned at outer shroud (3).

2, wedge block type lower pair overrun clutch according to claim 1 is characterized in that the center line C of slotted hole (2-1) and voussoir (2) go up between the string of a musical instrument D of cambered surface (2-2) an angle a is arranged.

3, wedge block type lower pair overrun clutch according to claim 1, the arc shaped surface (2-2) that it is characterized in that the voussoir (2) of wedging contacts with the outer surface formation face of interior ring (1), and the radius of curvature of arc shaped surface (2-2) is identical with the radius of interior ring (1) outer surface.