CN2205468Y

CN2205468Y - Single-way clutch

Info

Publication number: CN2205468Y
Application number: CN 94243960
Authority: CN
Inventors: 苏国顺; 高超; 张兴龙
Original assignee: Kaifeng Renhe Traffic Electrical Appliance Co Ltd
Current assignee: Kaifeng Renhe Traffic Electrical Appliance Co Ltd
Priority date: 1994-10-24
Filing date: 1994-10-24
Publication date: 1995-08-16
Anticipated expiration: 2004-10-24

Abstract

The utility model discloses a single-way clutch, particularly a ratchet wheel and pawl type single-way clutch. The ratchet wheel of the single-way clutch is arranged at the inner ring of the clutch and used as a driving end, a ratchet pawl disc is arranged at the outer ring of the clutch and used as a driven end, the driving end and the driven end are connected and positioned through a bearing, and the ratchet pawl on the ratchet pawl disc is pre-pressed on the ratchet wheel through a spring. The pre-pressure of the spring is larger than the gravity of the ratchet pawl and smaller than the centrifugal force of the ratchet pawl when the rotary speed of the ratchet pawl is 600n/min. Because the ratchet pawl can overcome the pre-pressure of the spring and fling out of the ratchet wheel to achieve disengagement when the ratchet pawl is in separation, the clutch has the advantages of no mechanical noise, no abrasion, and no friction energy consumption when the clutch runs.

Description

Single-way clutch

The utility model relates to a kind of overrunning clutch, particularly a kind of ratchet, pawl type overrunning clutch.Be applicable to that driven rotating speed can reach the mechanism more than 600 rev/mins.

Normally used ratchet, pawl type overrunning clutch generally are to carry out clutch by drive end that is positioned at inner ring (outer ring) and the driven end that is positioned at outer ring (inner ring) by ratchet and pawl.Ratchet engages with ratchet during the forward transferring power, finish the function of " closing ", when the driven end rotating speed is higher than drive end, ratchet surmounts ratchet and skids, finish " from " function, thereby cut off the power reverse transmission, this structure medi-spring gives pressure and is far longer than the centrifugal force of ratchet when centrifugal rotational speed, makes it under any circumstance, and ratchet, ratchet all contact, owing to surmounting under the state, ratchet skids on ratchet, will produce mechanicalness noise and wearing and tearing, is particularly surmounting under the state at a high speed, noise and wearing and tearing are more serious, also can produce friction energy loss simultaneously.

The purpose of this utility model is to provide a kind of does not only have mechanical noise and wearing and tearing surmounting under the separated state, and does not have the overrunning clutch of friction energy loss.

The utility model is achieved in that uses the centrifugal force that ratchet produces under rotation status, its ratchet is being surmounted when separating, and overcomes spring pressure and throws away ratchet and disengage, and cuts off the back transfer of moment.Its structure is: ratchet is positioned at the inner ring of clutch, as the power drive end, pawl disk is positioned at the outer ring of clutch, as the power driven end, ratchet is installed on the pawl disk, and be pressed on the ratchet in advance by spring, 2 ratchets are set on the pawl disk at least, at least be provided with two ratchets on the ratchet, the angle of ratchet and ratchet binding site is a leaning angle, and its best angle is 70 °-85 °, and spring gives pressure should be greater than the gravity of ratchet, its value is 9.8m, the centrifugal force during less than 600 rev/mins, and its value is 3.95mR * 10 ³(wherein, m is the ratchet quality, and R is the turning radius of ratchet) thus guarantee ratchet and ratchet surmounts under the state non-, promptly reliable connection during the forward transferring power is surmounting reliable separation under the state, realizes its purpose of this utility model.

The transmission of its power of this overrunning clutch can be adopted multiple mechanical types such as coaxial-type, gear type, belt wheel formula, application area broad.The utility model is owing to utilize centrifugal force can throw away ratchet to disengage surmounting under the separated state ratchet, and making does not only have friction energy loss, but also has eliminated mechanicalness noise and wearing and tearing.

In conjunction with the accompanying drawings the utility model is described in detail below by embodiment:

Fig. 1 is the utility model embodiment 1 a structural front view.

Fig. 2 is the utility model embodiment 1 a structure side view.

Embodiment 1:

Present embodiment is the overrunning clutch of float amount motorcycle initiating mechanism.

Ratchet (1) is a drive end, it is provided with 3 ratchets to be positioned at the clutch inner ring, pawl disk (5) is positioned at clutch outer, ratchet (3) is 3 and is installed on the driven end pawl disk (5), and by bearing pin (4) fixing and spring (2) is pressed on the ratchet (1) in advance, connect by rolling bearing (6) between the master and slave moved end and locate.

Wherein, ratchet quality m is 0.004 kilogram, and it is 0.4 newton that spring gives the pressure value, and the angle α of ratchet and ratchet binding site is 80 °.

Drive end can mesh with motorcycle starter among this embodiment, it is that spline can link with the motorcycle engine arbor that driven end connects, during work, when motor is static, the starting electrical machinery energising starts, power passes through ratchet, ratchet, pawl disk, spline passes to engine crankshaft, when its rotating speed behind the engine start is increased to more than 600 rev/mins, ratchet is under this rotating speed, surmount the drive end ratchet and throw away under centrifugal action, separate fully with ratchet, this moment, centrifugal force was 0.426 newton, cut off the back transfer of engine power, finish separation process to the starting electrical machinery end.

Embodiment 2:

Present embodiment is the overrunning clutch that middle discharge capacity motorcycle is used.Wherein the angle α of ratchet and ratchet binding site is 83 °, and ratchet quality m is 0.005 kilogram, and turning radius is 0.042 meter, and the number of hook tooth, ratchet is 3, and other structure is identical with embodiment 1.

Embodiment 3:

Present embodiment is big discharge capacity motorcycle overrunning clutch, wherein the angle α of ratchet and ratchet binding site is 85 °, and ratchet quality m is 0.015 kilogram, and turning radius R is 0.09 meter, the number of hook tooth and ratchet is 6, and other structure is also identical with embodiment 1.

Claims

1, a kind of overrunning clutch, ratchet (1) is positioned at the inner ring of clutch, pawl disk (5) is positioned at the outer ring of clutch, ratchet (3) is installed on the pawl disk (5), and give by spring (2) and to be pressed on the ratchet (1), it is characterized in that being provided with at least on the pawl disk (5) 2 ratchets (3), 2 ratchets are set on the ratchet (1) at least, the angle α of ratchet and ratchet binding site should be leaning angle, and the pressure that gives of spring (2) should be greater than the gravity of ratchet (3), the centrifugal force during less than 600 rev/mins of rotating speeds.

2, unidirectional centrifuge according to claim 1, the best angle (α) that it is characterized in that ratchet and ratchet binding site are 70 °-85 °.