CN201027842Y - Ratchet type overrunning clutch - Google Patents
Ratchet type overrunning clutch Download PDFInfo
- Publication number
- CN201027842Y CN201027842Y CNU2007200956519U CN200720095651U CN201027842Y CN 201027842 Y CN201027842 Y CN 201027842Y CN U2007200956519 U CNU2007200956519 U CN U2007200956519U CN 200720095651 U CN200720095651 U CN 200720095651U CN 201027842 Y CN201027842 Y CN 201027842Y
- Authority
- CN
- China
- Prior art keywords
- ratchet
- pawl disk
- pawls
- pawl
- overrunning clutch
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 239000000126 substance Substances 0.000 claims abstract description 14
- 238000009434 installation Methods 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 3
- 239000013013 elastic material Substances 0.000 claims description 2
- 239000011344 liquid material Substances 0.000 claims description 2
- 230000008901 benefit Effects 0.000 abstract description 2
- 238000005516 engineering process Methods 0.000 abstract description 2
- 230000009471 action Effects 0.000 description 4
- 239000004411 aluminium Substances 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000003993 interaction Effects 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000007858 starting material Substances 0.000 description 2
- 206010017367 Frequent bowel movements Diseases 0.000 description 1
- 229920000297 Rayon Polymers 0.000 description 1
- QJVKUMXDEUEQLH-UHFFFAOYSA-N [B].[Fe].[Nd] Chemical compound [B].[Fe].[Nd] QJVKUMXDEUEQLH-UHFFFAOYSA-N 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000011982 device technology Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 229910001172 neodymium magnet Inorganic materials 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
Images
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- One-Way And Automatic Clutches, And Combinations Of Different Clutches (AREA)
Abstract
The utility model discloses a ratchet overrunning coupler, comprising a ratchet wheel provided with a plurality of ratchets and a pawl disc provided with a plurality of pawls, wherein, a bearing is adopted to support between the ratchet wheel and the pawl disc which can rotate coaxially with the ratchet wheel; the pawls are rotatablely and evenly fixed on the periphery of the pawl disc through a pin roll; the head parts of the pawls and the ratchets can be meshed with each other; the middle parts of the pawls are provided with axle holes; one side of the tail parts of the pawls facing the pawl disc is fixed with magnetic substances. As one side of the tail parts of the pawls facing the pawl disc is fixed with magnetic substances, the magnetic attraction between the magnetic substances and the pawl disc controls the rotation of the pawls. Compared with that a magnet is arranged on the pawl disc, the advantage that a magnet is arranged on the tail part of the pawl can simplify processing technology and lower processing cost.
Description
Technical field
The utility model relates to a kind of ratchet type overrunning clutch, and its novel pawl structures can make this free wheel device be used for the frequent working state that meshes of heavy duty, the also working state that can be used for surmounting for a long time stably in a long term.
Background technique
China utility model patent CN91208227.5 discloses a kind of inertial centrifugal formula ratchet, wherein is provided with a magnet ring below ratchet.When gear rotates, thereby ratchet radially outward under action of centrifugal force opens with ratchet on the ratchet and is meshed.According to the disclosed technological scheme of this utility model patent, thereby to make it the power that radially outward swing is meshed with ratchet on the ratchet on the ratchet be centrifugal force owing to act on, so when ratchet rotates inflexible the time, this ratchet just can not be worked reliably.
U.S. Pat 5,205,386 disclose a kind of ratchet type overrunning clutch that has the ratchet holding device, wherein the radial outside at the ratchet end of engagement is provided with magnet, when the rotating speed of output shaft surpasses desired value, ratchet radially outward swing under action of centrifugal force in case it contacts with corresponding magnet, will be maintained by magnet.This clutch still is to take by the spring force as the ratchet engagement on swing of motivational drive ratchet and the ratchet, the working state that this clutch can only be used for surmounting for a long time.When heavy duty frequently surmounts, can load repeatedly, continually spring, the acceleration spring fatigue fracture, thus cause the whole clutch can not proper functioning.In addition, ratchet is acting in conjunction and ratchet engagement or the disengagement that relies on centrifugal force, elastic force and magnetic force, and the magnetic force decay of the instability of clutch rotational speed, the fatigue of spring and magnet all can influence the long-term proper functioning of clutch.
China utility model patent ZL00254031.2 discloses the ratchet type overrunning clutch that a kind of ratchet relies on magnetic force to reset.This clutch is applicable to the working state of frequent engagement, and when being used for surmounting working state for a long time, ratchet and ratchet need frequently contact, and is easy to wear and parts are damaged.It is interior ring that this patent limits pawl disk, and ratchet is an outer shroud, and under some applying working condition, it is the structural type of outer shroud that free wheel device must adopt with the pawl disk; Simultaneously, this patent defines magnet and is fixed on the pawl disk, processing technology complexity and processing cost height.
Summary of the invention
The purpose of this utility model is to overcome the deficiency of existing free wheel device technology, and a kind of ratchet type overrunning clutch is provided, and this clutch can improve the usability of free wheel device by using novel pawl structures, and cuts down finished cost.When this clutch was used for frequent engagement, novel pawl structures can reset rapidly, improved the accuracy of mesh with ratchet; When clutch is in when surmounting state for a long time, ratchet can rely on action of centrifugal force and ratchet to throw off fully, avoids wearing and tearing.This is that a kind of service behaviour is reliable more, Applicable scope is extensive more, the ratchet type overrunning clutch of longer service life.
The purpose of this utility model realizes by following proposal:
A kind of ratchet type overrunning clutch, comprise the ratchet that is provided with a plurality of ratchets, the pawl disk that a plurality of ratchets are set, but described ratchet and adopt bearings between the pawl disk of coaxial rotation with it, described ratchet evenly is fixed on the periphery of described pawl disk by pivot pin rotationally, the stem of described ratchet can be meshed each other with described ratchet, the middle part of described ratchet is provided with axis hole, and described ratchet afterbody is fixed with magnetic substance in the side towards pawl disk.
The characteristics of this ratchet type overrunning clutch are: its ratchet afterbody is fixed with magnetic substance towards a side of pawl disk, and the magnetic attraction between magnetic substance and the pawl disk is being controlled the rotation of ratchet.The advantage that magnet is placed on the ratchet afterbody and magnet are compared at pawl disk can simplified processing process, cuts down finished cost.For reducing the influence of the passive impact of ratchet in frequent motion to magnetic substance, magnetic substance can be encapsulated in the installation sleeve that is full of viscous liquid or elastic material, installation sleeve is made by the nonferromagnetic material, as aluminium.
Installation sleeve can adopt modes such as viscose glue or screw thread to be fixed in the boring or dovetail groove that the ratchet afterbody pre-sets.Under normal operation, the ratchet afterbody can not come in contact and collide with any other parts.
Ratchet number and ratchet number be prime number each other, during engagement, a ratchet and ratchet engagement is arranged in turn at every turn, has prolonged the working life of clutch; By changing the quantity and the physical dimension of ratchet and ratchet, just can effectively change the accuracy of mesh (return and end the angle) or the transmitting torque of clutch; This pawl structures reaches and frequent engagement of ratchet or the long-time working state that breaks away from by adjusting the interaction relationship of reposition force and centrifugal force, makes that the operation of clutch is stable more, reliable.
Description of drawings
Fig. 1 is the structure side view that the utility model pawl disk is arranged on the ratchet outside;
Fig. 2 is the sectional drawing of structure shown in Figure 1;
Fig. 3 is the structure side view that the utility model pawl disk is arranged on the ratchet inboard;
Fig. 4 is the sectional drawing of structure shown in Figure 3.
Embodiment
The ratchet type overrunning clutch that the utility model is related, comprise the ratchet that is provided with ratchet, the pawl disk that is provided with ratchet, adopt bearings to guarantee that the ratchet and pawl dish can coaxial rotation between the two, the as a whole structure of described pawl structures is divided into stem, axial region and three parts of afterbody.The ratchet stem comprises the contact jaw with surface of contact, with ratchet engagement; The ratchet axial region is provided with axis hole, makes ratchet be installed in rotation on the pawl disk by pivot pin; The side that the ratchet afterbody is corresponding with pawl disk is provided with magnetic substance,, can attract each other the rotation of control ratchet with pawl disk as neodymium iron boron.
As shown in the figure, a kind of ratchet type overrunning clutch described in the utility model, comprise the ratchet 1 that is provided with a plurality of ratchets 4, the pawl disk 2 that a plurality of ratchets 3 are installed, can adopt bearing 5 to support between the two, and guarantee that ratchet 1 and pawl disk 2 can coaxially relatively rotate.Described ratchet 3 is supported on the pawl disk 2 rotationally by pivot pin 6, and ratchet 3 can mesh with ratchet 4 under the magnetic attraction effect of magnetic substance 7 and pawl disk 2 rightly.
It is inner and be fixed on the side of ratchet 3 afterbodys towards pawl disk 2 that described magnetic substance 7 is embedded in installation sleeve 8, so that magnetic attraction is to the maximum is good, described installation sleeve 8 adopts non-magnet_conductible materials to make, as aluminium.
The centroid position of described ratchet 3 can design adjustment as required, and when free wheel device was used for frequently meshing operating mode, the centroid position of ratchet 3 should make moment that centrifugal force produced less than the reseting torque of magnetic attraction, and preferably the moment direction is identical; When free wheel device was used for surmounting operating mode for a long time, the centroid position of ratchet 3 should make moment that centrifugal force produced greater than the reseting torque of magnetic attraction, and the moment direction is opposite.Like this, free wheel device just can rely on the interaction of reposition force and centrifugal force according to different usage requirements, makes ratchet 3 and ratchet 4 engagements or disengagement.
For improving the accuracy of mesh of clutch, the number of the number of ratchet 3 and ratchet 4 is prime number each other.According to actual usage requirement,, change the accuracy of mesh (return and end the angle) or the transmitting torque of clutch by changing the number and the physical dimension of ratchet 3 or ratchet 4.
As a kind of mode of execution of the present utility model, as shown in Figure 1, ratchet 1 is arranged on inside, pawl disk 2 is arranged on the outside of described ratchet 1, this structure is applicable to the operating mode that similar gas turbine starts, and ratchet 1 links to each other with the live axle of starter, and pawl disk 2 links to each other with the gas turbine driven shaft.Under the effect of starter, after gas turbine started and reaches certain rotating speed, the ratchet 3 of clutch kept the disengaged position with ratchet 7 under action of centrifugal force, avoided frequent engagement and caused wearing and tearing.
As another kind of mode of execution of the present utility model as shown in Figure 3 ratchet 1 be arranged on the outside, pawl disk 2 is arranged on the inside of described ratchet 1, this structure is applicable to the operating mode of frequent engagement such as similar loader or pumping unit, and ratchet 1 links to each other with drive wheel, and pawl disk 2 links to each other with live axle.
Claims (4)
1. ratchet type overrunning clutch, comprise the ratchet that is provided with a plurality of ratchets, the pawl disk that a plurality of ratchets are set, but described ratchet and adopt bearings between the pawl disk of coaxial rotation with it, described ratchet evenly is fixed on the periphery of described pawl disk by pivot pin rotationally, described ratchet stem can be meshed each other with described ratchet, it is characterized in that: described ratchet afterbody is fixed with magnetic substance in the side towards pawl disk.
2. ratchet type overrunning clutch according to claim 1, it is characterized in that: described magnetic substance is covered with the installation sleeve of being made by non-magnet_conductible material, described installation sleeve is fixed on the side of ratchet afterbody towards pawl disk, is filled with viscous liquid or elastic material between installation sleeve and magnetic substance.
3. ratchet type overrunning clutch according to claim 1 is characterized in that: described ratchet is arranged on pawl disk inside.
4. ratchet type overrunning clutch according to claim 1 is characterized in that: described ratchet is arranged on the pawl disk outside.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200956519U CN201027842Y (en) | 2007-03-30 | 2007-03-30 | Ratchet type overrunning clutch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200956519U CN201027842Y (en) | 2007-03-30 | 2007-03-30 | Ratchet type overrunning clutch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201027842Y true CN201027842Y (en) | 2008-02-27 |
Family
ID=39132051
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200956519U Expired - Fee Related CN201027842Y (en) | 2007-03-30 | 2007-03-30 | Ratchet type overrunning clutch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201027842Y (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101614253B (en) * | 2009-07-23 | 2010-12-08 | 东南大学 | Clutch for dual drive system |
| CN101947363A (en) * | 2010-09-29 | 2011-01-19 | 北京工商大学 | Escape and transporting device for tall buildings |
| CN106931055A (en) * | 2015-12-29 | 2017-07-07 | 简志伟 | Transmission device |
| CN108591302A (en) * | 2018-05-28 | 2018-09-28 | 瀚伦贝尔通用航空器有限公司 | A kind of ratchet device of rotary-wing transmission |
| CN108916356A (en) * | 2018-07-09 | 2018-11-30 | 武汉理工大学 | A two-way clutch bevel gear |
| CN109225964A (en) * | 2018-09-29 | 2019-01-18 | 安徽兆拓新能源科技有限公司 | A kind of photovoltaic sweeping robot with rainwater collecting function |
| CN112178073A (en) * | 2020-09-24 | 2021-01-05 | 温州市简系文具有限公司 | A stabilizing ratchet device |
| CN114576016A (en) * | 2022-03-29 | 2022-06-03 | 清航空天(北京)科技有限公司 | Turbojet engine and starting device thereof |
-
2007
- 2007-03-30 CN CNU2007200956519U patent/CN201027842Y/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101614253B (en) * | 2009-07-23 | 2010-12-08 | 东南大学 | Clutch for dual drive system |
| CN101947363A (en) * | 2010-09-29 | 2011-01-19 | 北京工商大学 | Escape and transporting device for tall buildings |
| CN106931055A (en) * | 2015-12-29 | 2017-07-07 | 简志伟 | Transmission device |
| CN108591302A (en) * | 2018-05-28 | 2018-09-28 | 瀚伦贝尔通用航空器有限公司 | A kind of ratchet device of rotary-wing transmission |
| CN108916356A (en) * | 2018-07-09 | 2018-11-30 | 武汉理工大学 | A two-way clutch bevel gear |
| CN109225964A (en) * | 2018-09-29 | 2019-01-18 | 安徽兆拓新能源科技有限公司 | A kind of photovoltaic sweeping robot with rainwater collecting function |
| CN109225964B (en) * | 2018-09-29 | 2020-10-09 | 苏州睿澎诚科技有限公司 | Photovoltaic cleaning robot with function is collected to rainwater |
| CN112178073A (en) * | 2020-09-24 | 2021-01-05 | 温州市简系文具有限公司 | A stabilizing ratchet device |
| CN114576016A (en) * | 2022-03-29 | 2022-06-03 | 清航空天(北京)科技有限公司 | Turbojet engine and starting device thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080227 |