CN202493658U

CN202493658U - Overruning clutch pulley

Info

Publication number: CN202493658U
Application number: CN2011205386560U
Authority: CN
Inventors: 辛艳凤
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-12-21
Filing date: 2011-12-21
Publication date: 2012-10-17
Anticipated expiration: 2021-12-21

Abstract

The utility model discloses an overruning clutch pulley, which comprises a pulley main shaft, a shaft sleeve, a pulley outer ring, a spring type sealing ring and a special roller one-way retainer, wherein a sealing type bearing and a bearing are respectively arranged on two ends of the special roller one-way retainer. The overruning clutch pulley is characterized in that: a group of special rollers is uniformly embedded in the special roller one-way retainer by a spring. The hard friction of a traditional gear type thrusting piece is eliminated, the special roller one-way retainer is used, and the change in the contact angle between the arc surface of the inner side surface of the special roller and the pulley main shaft is used when the relative rotation speed of the pulley outer ring and the pulley main shaft changes, thus one-way flexible friction between the special roller and the pulley main shaft is achieved, the hard friction in the pulley is completely avoided, the noise is reduced and the service life is prolonged. On the other hand, the sealing type bearing and the spring type sealing ring are used, thus the dust is difficult to enter and furthermore the failure rate is reduced.

Description

A kind of one-way element belt pulley

Technical field

The utility model relates to a kind of one-way element belt pulley.

Background technique

The reverse current that generator of engine one-way element belt pulley produces in the time of can avoiding counter-rotating promotes life-span, the reduction carbon monoxide emission of generator system to prevent to injure the electronic device in the car.Engine-generator one-way element in the market, its belt pulley adopts the rolling bearing transmission mostly.The radial dimension of rolling bearing is bigger, and damping capacity is relatively poor, when running up the life-span low, sound is louder.And rolling bearing is had relatively high expectations for bearing, after general axis takes up the working position, often owing to cause the bad of installation and location, therefore often produces reasons such as fatigue strength and thermal expansion because of axle, and customary bearing bears excessive load, causes early stage damage.So this bearing has a lot of shortcomings; The kind of drive of rolling bearing makes and radially wobbles greatly, thereby it is bigger to cause rubbing, and noise is big when further causing motion; And because friction higherly causes the use of belt pulley to receive the order to shorten, rate of fault is high, so the kind of drive of rolling bearing is difficult to promote.

For addressing the above problem, like Chinese patent ZL 200920144929.6 disclosed a kind of one-way element belt pulleys.It comprises Pulley shaft 1, and described Pulley shaft 1 is provided with axle sleeve 2, and axle sleeve 2 is provided with belt pulley outer ring 3; Be provided with roller one-way clutch 4 between said axle sleeve 2 and the belt pulley outer ring 3; The two ends of roller one-way clutch are respectively equipped with oil-impregnated bearing 5; Wherein an end of an oil-impregnated bearing 5 is provided with seal ring 6; The axial plane sliding bearing 7 that one end of another oil-impregnated bearing 5 is provided with, a side of plane sliding bearing 7 is provided with axial thrust sheet 8; Be provided with dust-proof cover 9 between said axial thrust sheet 8 and the belt pulley outer ring 3.The one-way element belt pulley of said structure supports at the radial and axial sliding bearing that all adopts on the one hand, has reduced friction, has reduced noise, and generation time is improved; Adopt two way sealed on the other hand, make dust be difficult to get into, thereby reduced rate of fault.

Yet; The one-way element belt pulley of said structure, though solved the shortcoming of rolling bearing one-way element belt pulley to a certain extent, because the rigid friction of gear type thrust plate 8 and Pulley shaft 1; The fatigue strength and the thermal expansion factor of axle have been increased; Make bearing bear the wearing and tearing too early of excessive load and overrunning clutch and cause shorten the working life of belt pulley, rate of fault is high, does not therefore fundamentally address this problem as yet.

Summary of the invention

What the utility model will solve is the problem that hard friction, life-span are short and rate of fault is high that existing one-way element belt pulley exists, and aims to provide a kind of novel one-way element belt pulley.

For addressing the above problem; The utility model adopts following technological scheme: a kind of one-way element belt pulley, comprise the belt pulley main shaft, and said belt pulley main shaft is provided with axle sleeve; Described axle sleeve is provided with the belt pulley outer ring, is provided with the spring seal ring between said belt pulley outer ring and the belt pulley main shaft; Be provided with the unidirectional retainer of special-shaped roller between said axle sleeve and the belt pulley main shaft; The two ends of the unidirectional retainer of described special-shaped roller are respectively equipped with sealed type carrier bearing and carrier bearing; It is characterized in that one group of special-shaped roller evenly is embedded in the unidirectional retainer of said special-shaped roller through spring; Described one group of special-shaped roller can slightly relative movement in the unidirectional retainer of described special-shaped roller; And with described belt pulley main shaft opposed inside face be cambered surface; This inner side surface is exerted pressure until the described belt pulley main shaft of thrust to described belt pulley main shaft gradually when belt pulley outer ring rotating speed surpasses belt pulley spindle speed, and when described belt pulley spindle speed surpasses described belt pulley outer ring rotating speed, described belt pulley outer ring is separated with described belt pulley main shaft.

The one-way element belt pulley of the utility model; Cancel the rigid friction of the wheeled thrust plate of conventional tooth, adopted the unidirectional retainer of special-shaped roller, utilized the variation of contact angle of cambered surface and the belt pulley main shaft of special-shaped roller special-shaped roller inner side surface when belt pulley axle sleeve and belt pulley main shaft relative rotation speed change; Make special-shaped roller and belt pulley main shaft form flexible friction and reach unidirectional purpose; Avoid the inner hard friction of belt pulley fully, reduce noise, improve working life; Adopt sealed type carrier bearing and spring seal ring on the other hand, make dust be difficult to get into, thereby reduce rate of fault.The extraordinary antiwear lubricating grease of inner employing under rugged environment, keeps the excellent lubrication effect.

Further improvement as the utility model; Described special-shaped roller also has an end face that contacts with said spring and one and described belt pulley axle sleeve opposite external side face; The cambered surface of described outer side surface for reducing gradually along belt pulley axle sleeve sense of rotation radius of curvature, the radius of curvature of described inner side surface increases along belt pulley main shaft sense of rotation gradually.Because belt pulley outer ring and axle sleeve are drive fit, constitute an overall structure, thereby both run-in synchronisms.When belt pulley outer ring rotating speed surpasses belt pulley spindle speed, sense of rotation forwards the gap of its radial dimension greater than retainer and main shaft to around self center to described special-shaped roller along the belt pulley outer ring, the belt pulley main shaft is formed push away; When belt pulley spindle speed surpasses belt pulley outer ring rotating speed, the contrary belt pulley main shaft of described special-shaped roller turns to the gap of its radial dimension less than retainer and main shaft, belt pulley main shaft and the disengagement of belt pulley outer ring.

As further improving again of the utility model, the end face of described special-shaped roller is the plane, helps the installation and the location of spring.

As further improving again of the utility model, the cross section of said special-shaped roller is " C " type, can reduce the volume and weight of special-shaped roller, thereby reduces manufacture cost, and can improve the working sensitivity of one-way element.

As the further improvement of the utility model, said spring is a pair of conjoined spring.

Description of drawings

Fig. 1 is the structural representation of existing one-way element belt pulley.

Fig. 2 is the structural representation of the utility model one-way element belt pulley.

Fig. 3 is the structural representation after Fig. 2 removes the belt pulley outer ring.

Fig. 4 is the structural representation of the unidirectional retainer of the special-shaped roller of the utility model.

Fig. 5 is the structural representation of the special-shaped roller of the utility model.

Fig. 6 is the cross-sectional view of the unidirectional retainer of the special-shaped roller of the utility model.

Embodiment

With reference to Fig. 2 and Fig. 3; A kind of one-way element belt pulley of the utility model comprises belt pulley main shaft 12, and said belt pulley main shaft 12 is provided with axle sleeve 17; Described axle sleeve 17 is provided with belt pulley outer ring 19, is provided with spring seal ring 18 between said belt pulley outer ring 19 and the belt pulley main shaft 12; Be provided with the unidirectional retainer 13 of special-shaped roller between said axle sleeve 17 and the belt pulley main shaft 12, the two ends of the unidirectional retainer 13 of described special-shaped roller are respectively equipped with sealed type carrier bearing 11 and carrier bearing 16.

With reference to Fig. 4, the unidirectional retainer 13 of described special-shaped roller is circular ring, evenly offers one group of through hole 1301 radially on it, respectively is provided with the special-shaped roller 14 of " C " type in each through hole 1301.Above each through hole 1301, be equipped with a pair of tangential slot 1302, in every pair of tangential slot 1302, be provided with a pair of conjoined spring 15, described conjoined spring 15 is pushed down the end face 1402 of said special-shaped roller 14.

With reference to Fig. 5, said special-shaped roller 14 has an end face that contacts with said spring 15 1402, one and described axle sleeve 17 opposite external side faces 1403 and one and described belt pulley main shaft 12 opposed inside faces 1401.Described end face 1402 is the plane, and described outer side surface 1403 is the cambered surface that 19 sense of rotation radius of curvature reduce gradually along the belt pulley outer ring, the cambered surface of described inner side surface 1401 for increasing gradually along belt pulley main shaft 12 sense of rotation radius of curvature.

A kind of novel one-way element belt pulley two ends of the utility model are that sealed type carrier bearing 11 supports with carrier bearing 16; The centre is the unidirectional retainer 13 of special-shaped roller; The location that the unidirectional retainer 13 of special-shaped roller keeps belt pulley main shaft 12 is worked in coordination with the bearing capacity of seal carrier bearing 11 and carrier bearing 16 and is played the effect of anti-attrition noise reduction synchronously the time; Special-shaped roller 14 in the unidirectional retainer 13 of special-shaped roller changes the function that realizes unidirectional thrust plate with exclusive angle.During with reference to Fig. 6 static state, the end face 1402 of special-shaped roller 14 is the radial plane.When engine start; Belt pulley outer ring 19 all rotates counterclockwise with belt pulley main shaft 12; Belt pulley outer ring 19 rotating speeds surpass belt pulley main shaft 12 rotating speeds; This moment, axle sleeve 17 produced frictional force with the outside cambered surface 1403 of special-shaped roller 14 in the synchronous unidirectional retainer 13 of special-shaped roller of belt pulley main shaft 12; Cause special-shaped roller to rotate counterclockwise the gap of its radial dimension D1 greater than retainer and main shaft around self center, thereby make 12 thrusts of belt pulley main shaft and homodromous effect, belt pulley outer ring 19 is synchronous with belt pulley main shaft 12; When belt pulley main shaft 12 rotating speeds surpass belt pulley outer ring 19 rotating speeds; The frictional force of belt pulley main shaft 12 and the inner side surface 1401 of special-shaped roller 14 causes special-shaped roller to rotate counterclockwise the gap of its radial dimension D2 less than retainer and main shaft around self center; This moment, belt pulley main shaft 12 was a minimum value with the frictional force of the inner side surface 1401 of special-shaped roller 14, and separate with belt pulley main shaft 12 belt pulley outer ring 19; Therefore on the one hand at the radial and axial carrier bearing that all adopts, adopt the collaborative of the unidirectional retainer of special-shaped roller on the other hand, maximum degree ground has reduced friction, reduces noise, makes the longer service life of one-way element.Add the employing two way sealed, seal carrier bearing 11 makes dust be difficult to get into spring seal ring 18, thereby rate of fault is reduced.Secondly the extraordinary antiwear lubricating grease of inner employing under rugged environment, keeps the excellent lubrication effect.

What should be understood that is: the foregoing description is just to the explanation of the utility model, rather than to the restriction of the utility model, any model utility that does not exceed in the utility model connotation scope is created, and all falls within the protection domain of the utility model.

Claims

1. one-way element belt pulley; Comprise belt pulley main shaft (12); Said belt pulley main shaft (12) is provided with axle sleeve (17); Described axle sleeve (17) is provided with belt pulley outer ring (19), is provided with spring seal ring (18) between said belt pulley outer ring (19) and the belt pulley main shaft (12); Be provided with the unidirectional retainer of special-shaped roller (13) between said axle sleeve (17) and the belt pulley main shaft (12); The two ends of the unidirectional retainer of described special-shaped roller (13) are respectively equipped with sealed type carrier bearing (11) and carrier bearing (16); It is characterized in that one group of special-shaped roller (14) evenly is embedded in the unidirectional retainer of said special-shaped roller (13) through spring (15); Described one group of special-shaped roller (14) can slightly relative movement in the unidirectional retainer of described special-shaped roller (13); And with described belt pulley main shaft (12) opposed inside face (1401) be cambered surface; This inner side surface (1401) is exerted pressure until the described belt pulley main shaft of thrust (12) to described belt pulley main shaft (12) gradually when belt pulley outer ring (19) rotating speed surpasses belt pulley main shaft (12) rotating speed, and when described belt pulley main shaft (12) rotating speed surpasses described belt pulley outer ring (19) rotating speed, described belt pulley outer ring (19) is separated with described belt pulley main shaft (12).

2. one-way element belt pulley as claimed in claim 1; It is characterized in that described special-shaped roller (14) also has an end face (1402) that contacts with said spring (15) and one and described axle sleeve (17) opposite external side face (1403); Described outer side surface (1403) is the cambered surface that the sense of rotation radius of curvature reduces gradually along belt pulley outer ring (19), and the radius of curvature of described inner side surface (1401) increases along belt pulley main shaft (12) sense of rotation gradually.

3. one-way element belt pulley as claimed in claim 2 is characterized in that the end face (1402) of described special-shaped roller (14) is the plane.

4. one-way element belt pulley as claimed in claim 3 is characterized in that the cross section of said special-shaped roller (14) is " C " type.

5. like any one described one-way element belt pulley of claim 1-3, it is characterized in that said spring (15) is a pair of conjoined spring.