CN208331038U - Low noise ratchet type overrunning clutch - Google Patents
Low noise ratchet type overrunning clutch Download PDFInfo
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- CN208331038U CN208331038U CN201820729663.0U CN201820729663U CN208331038U CN 208331038 U CN208331038 U CN 208331038U CN 201820729663 U CN201820729663 U CN 201820729663U CN 208331038 U CN208331038 U CN 208331038U
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- pawl
- ratchet
- control sheet
- friction
- friction zone
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Abstract
The technical issues of the utility model discloses a kind of low noise ratchet type overrunning clutch, are related to Clutch Technology field, and big, easy to wear, spring is easily damaged for prior art noise is provided with friction zone using ratchet side；Pawl is fixedly connected with one end of pawl control sheet；The other end of pawl control sheet and the scheme of friction zone CONTACT WITH FRICTION, the program on pawl by being fixedly installed pawl control sheet, the other end and friction zone CONTACT WITH FRICTION of pawl control sheet, and friction zone is arranged in ratchet side, when ratchet and pawl disk relative motion, the frictional force that is generated by pawl control sheet realizes pressure to pawl or lifts control, so that the shock for avoiding the problem that in ratchet and pawl disk discrete state because of pawl and ratchet generates noise and the long-term high frequency of ratchet spring is shunk leads to fatigue damage.
Description
Technical field
The utility model relates to Clutch Technology field, in particular to a kind of low noise ratchet type overrunning clutch.
Background technique
Freewheel clutch is for power to pass between prime mover and working machine or inside machine between driving shaft and driven shaft
The important component with separation function is passed, it is that have voluntarily using the velocity variations of driving and driven part or the transformation of direction of rotation
The device of clutch function, its inner ring and outer rings all can be used as drive end, main when drive end revolving speed is higher than driven end
Moved end drives the equidirectional rotation of driven end；Opposite sliding is disengaged both when drive end revolving speed is lower than driven end, does not transmit torque,
This sliding mode for not transmitting torque is known as surmounting.Freewheel clutch be divided into Wedge type over running clutch, roller-type overrunning from
Clutch and ratchet type overrunning clutch.
Wedge-type and roller-type overrunning clutch are to be locked inner ring and outer ring using voussoir or roller to transmit torque,
In locking state and surmount state all in the presence of frictionally causing to wear, is easy to cause frictional force insufficient after abrasion and skids, load
It is overweight to be also easy to skid.Wedge type over running clutch and roller-type overrunning clutch structure are all more complicated, and processing technology is more
Complexity, cost are relatively high.Ratchet type overrunning clutch and Wedge type over running clutch and roller-type overrunning clutch structure compared
Simply, processing technology is relatively simple, at low cost, and ratchet type overrunning clutch not instead of frictionally transmits torque,
Ratchet slot is inserted by pawl will not skid when locking inner ring and outer ring, therefore transmitting torque, but pawl one when surmounting state
It is directly slipped over from ratchet top, pawl and ratchet are easier to wear than Wedge-type and roller, and spring is tired because frequency is tired of that movement is easy
It strains bad, noise is big.
Fig. 1 is a kind of common structure of existing ratchet type overrunning clutch, when ratchet is drive end, if ratchet rotates forward simultaneously
And revolving speed be not less than pawl disk when, pawl be inserted into ratchet ratchet slot, drive the equidirectional rotation of pawl disk uniform velocity, carry out power
Transmitting, if ratchet reversion or revolving speed are lower than pawl disk, pawl is slipped over from ratchet top disengages the connection of the two, Bu Nengchuan
Graduating power, in surmounting state；Otherwise when pawl disk is drive end, only pawl disk is inverted and revolving speed is not less than spine
Power could be transmitted when wheel, be otherwise in and surmounted state.It slips over to generate from ratchet top in pawl when surmounting state and make an uproar
Sound, pawl and ratchet are prone to wear, and ratchet spring acts because frequency is tired and is easy fatigue damage.
Utility model content
The utility model provides a kind of low noise ratchet type overrunning clutch, greatly, easily grinds to solve prior art noise
The technical issues of damage, spring are easily damaged.
It is realized to solve the above problems, the utility model adopts the following technical solution:
A kind of low noise ratchet type overrunning clutch, including ratchet, pawl disk, ratchet slot, pawl shaft, pawl, pawl bullet
Spring, the ratchet side are provided with friction zone；
The pawl is fixedly connected with one end of pawl control sheet；
The other end of the pawl control sheet and the friction zone CONTACT WITH FRICTION.
By being fixedly installed pawl control sheet on pawl, the other end of pawl control sheet connects with friction zone friction
Touching, and friction zone setting is in ratchet side, when ratchet and pawl disk relative motion, the frictional force that is generated by pawl control sheet
It realizes the pressure to pawl or lifts control, to avoid the shock in ratchet and pawl disk discrete state because of pawl and ratchet
Leading to the problem of noise and the long-term high frequency contraction of ratchet spring leads to fatigue damage.
Preferably, the friction zone is annular in shape, is arranged concentrically on ratchet side, and the diameter of friction zone is greater than pawl disk
Diameter.
Using cyclic structure friction zone and be arranged concentrically on ratchet side, friction free of discontinuities may be implemented, guarantee its fortune
Capable is steady.
Preferably, the pawl is connected with pawl control sheet using integrally connected or fixing piece.
Cost of manufacture and assembling cost can be improved using integrally connected mode；It is fixed then using fixing piece convenient for more
It changes, i.e. pawl control sheet damage only needs replacing pawl control sheet, does not have to replacement pawl, therefore also reduce its cost.
Preferably, cyclic structure is made by shaggy material in the friction zone, and the cyclic structure is solid using fixing piece
It is scheduled on the side of ratchet.
Friction zone is made into independent cyclic structure, is convenient for changing.
Preferably, the pawl control sheet is made of flexible material.
Flexible material can be improved its frictional force.
Preferably, the fixing piece is bolt or screw.
Preferably, the friction zone surface uses roughening treatment, to improve its frictional force；
The one side of the pawl control sheet and friction zone CONTACT WITH FRICTION is also roughened, to improve its frictional force.
The utility model beneficial effect includes:
Structure is simple, and pawl is disengaged with ratchet when surmounting state, does not rub, therefore will not generate abrasion, also not
Noise can be generated.Because required frictional force is small, pawl locking plate and the phase mutual friction of ratchet friction zone are lighter, and abrasion is small,
The noise of generation is also small.It is not frictional drive, so not having frictional dissipation in transmission dynamic process, will not skids, transmission effect
Rate is high.Pawl locking plate and the ratchet friction zone for generating friction are small in size, and structure is simple, and readily replaceable, replacement cost is low.Therefore
Its clever structure, low in cost, easy to operate, stability is good, convenient for assembling and maintenance, has extensive promotion prospect.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of existing ratchet type overrunning clutch；
Fig. 2 is structural schematic diagram of the embodiment provided by the utility model when surmounting state；
Fig. 3 is structural schematic diagram of the embodiment provided by the utility model in locking state；
In figure, each label is respectively indicated: ratchet 1, pawl disk 2, ratchet slot 3, pawl shaft 4, pawl 5, ratchet spring 6,
Friction zone 7, pawl control sheet 8.
Specific embodiment
To keep the purpose of this utility model, technical solution and advantage clearer, implement below in conjunction with the utility model
Fig. 2-3 in example, the technical scheme in the utility model embodiment is clearly and completely described, it is clear that described reality
Applying example is the utility model a part of the embodiment, instead of all the embodiments.Usually it is described and illustrated herein in the accompanying drawings
The detailed description of the embodiments of the present invention is not intended to limit the range of claimed invention, but only table
Show the selected embodiment of the utility model.Based on the embodiments of the present invention, those of ordinary skill in the art are not doing
Every other embodiment obtained under the premise of creative work out, fall within the protection scope of the utility model.
As shown in Figures 2 and 3, a kind of low noise ratchet type overrunning clutch, including ratchet 1, pawl disk 2, ratchet slot 3,
Pawl shaft 4, pawl 5, ratchet spring 6,1 side of ratchet are provided with friction zone 7；
Pawl 5 is fixedly connected with one end of pawl control sheet 8；
The other end and 7 CONTACT WITH FRICTION of friction zone of pawl control sheet 8.
Specifically, friction zone 7 is annular in shape, is arranged concentrically on 1 side of ratchet, and the diameter of friction zone 7 is greater than pawl disk 2
Diameter.Pawl 5 is connected with pawl control sheet 8 using integrally connected or fixing piece.Friction zone 7 is made of shaggy material
Cyclic structure, the cyclic structure are fixed on the side of ratchet 1 using fixing piece.Pawl control sheet 8 uses flexible material
It is made.Fixing piece is bolt or screw.7 surface of friction zone uses roughening treatment, to improve its frictional force；
Pawl control sheet 8 and the one side of 7 CONTACT WITH FRICTION of friction zone are also roughened, to improve its frictional force.
The utility model increases a piece of pawl control sheet 8 on original pawl 1 and makes a friction zone 7 on ratchet 1
To solve the technical issues of prior art noise is big, easy to wear, spring is easily damaged.Pawl control sheet 8 is contacted by elastic tight
, can be by pawl control sheet 8 and 5 cast solid of pawl on 1 side of ratchet, this spline structure is very firm, but pawl control sheet 8 is ground
It then to be replaced together with pawl 5 after damage；Pawl control sheet 8 can also be bolted on pawl 5, such pawl control sheet
Only needing replacing pawl control sheet 8 after 8 abrasions can.
The friction zone 7 of ratchet 1 is the annular section that contacts with pawl control sheet of ratchet side, by the surface in this region with
The surface roughening of pawl control sheet 8 and this region contact part is to increase frictional force.The materials such as metal or plastics can also be used
Material is made ring segment and is bolted on ratchet as friction zone 8, and annular pad wear only needs replacing ring segment later can
With no replacement is required ratchet 1.
Assuming that ratchet 1 is drive end, and when ratchet 1 inverts or revolving speed is lower than pawl disk 2, using pawl disk 2 as object of reference,
Then ratchet 1 is reversion at this time, and pawl 5 is detached from the top that ratchet slot 3 is shifted onto ratchet by ratchet 5, simultaneously because the effect of frictional force
Friction zone one end with pawl control sheet is mobile to reverse directions, overcomes the elastic band pawl of ratchet spring to push and is detached from spine
Tooth tip (as shown in Figure 2), is now in and surmounts state, cannot transmit power, in the case where surmounting state since pawl is by pawl control
Film-making drives to push not generate with ratchet top and contact, so avoiding existing ratchet type overrunning clutch is surmounting state generation
Abrasion and noise；(the i.e. direction of rotation of ratchet and pawl disk when ratchet drops to very low relative to the speed that pawl disk inverts
It is identical, and when the revolving speed of ratchet is gradually increased close to the revolving speed of pawl disk), pawl locking plate and the frictional force of ratchet friction zone subtract
Small, pawl is raised by the elastic force of ratchet spring, and the tooth socket that pawl is inserted into ratchet when rotating forward for ratchet drives pawl disk rotation to carry out
Prepare.When ratchet rotates forward (when the revolving speed of ratchet will be more than the revolving speed of pawl disk), due to the zone of action pawl of frictional force
The friction zone end of control sheet is mobile to forward rotation direction, and the tooth socket with pawl insertion ratchet together with the elastic force of ratchet spring makes
The generation of ratchet and pawl disk is connected by power, and can transmit power (as shown in Figure 3).Conversely, working when using pawl disk as drive end
Process is similar with this.
The elastic force of ratchet spring should obtain smaller, and such pawl control sheet, which does not need very big frictional force, can drive spine
Pawl pushes, and to reducing mechanism, it is highly beneficial to reduce abrasion.Particularly, when ratchet spring fracture damage, pawl control sheet is still
Pawl can be controlled by frictional force to be rotated accordingly, thus allow for normally working, the clutch not influenced
Performance, therefore ratchet spring can be cancelled to simplify the internal structure of an organization.
The technical solution structure is simple, and pawl is disengaged with ratchet when surmounting state, does not rub, therefore will not generate
Abrasion, will not generate noise.Because required frictional force is small, pawl locking plate and the phase mutual friction of ratchet friction zone compared with
Gently, abrasion is small, and the noise of generation is also small.It is not frictional drive, so not having frictional dissipation in transmission dynamic process, will not beats
Sliding, transmission efficiency is high.Pawl locking plate and the ratchet friction zone for generating friction are small in size, and structure is simple, readily replaceable, are replaced with
This is low.
Claims (7)
1. a kind of low noise ratchet type overrunning clutch, including ratchet (1), pawl disk (2), ratchet slot (3), pawl shaft (4) spine
Pawl (5), ratchet spring (6), it is characterised in that:
Ratchet (1) side is provided with friction zone (7)；
The pawl (5) is fixedly connected with one end of pawl control sheet (8)；
The other end and the friction zone (7) CONTACT WITH FRICTION of the pawl control sheet (8).
2. low noise ratchet type overrunning clutch according to claim 1, it is characterised in that:
The friction zone (7) annularly, is arranged concentrically on ratchet (1) side, and the diameter of friction zone (7) is greater than pawl disk (2)
Diameter.
3. low noise ratchet type overrunning clutch according to claim 1, it is characterised in that:
The pawl (5) is connected with pawl control sheet (8) using integrally connected or fixing piece.
4. low noise ratchet type overrunning clutch according to claim 1, it is characterised in that:
Cyclic structure is made by shaggy material in the friction zone (7), which is fixed on ratchet using fixing piece
(1) side.
5. low noise ratchet type overrunning clutch according to claim 1, it is characterised in that:
The pawl control sheet (8) is made of flexible material.
6. low noise ratchet type overrunning clutch according to claim 3 or 4, it is characterised in that:
The fixing piece is bolt or screw.
7. low noise ratchet type overrunning clutch according to claim 1, it is characterised in that:
Friction zone (7) surface uses roughening treatment, to improve its frictional force；
The pawl control sheet (8) and the one side of friction zone (7) CONTACT WITH FRICTION are also roughened, to improve its friction
Power.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820729663.0U CN208331038U (en) | 2018-05-16 | 2018-05-16 | Low noise ratchet type overrunning clutch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820729663.0U CN208331038U (en) | 2018-05-16 | 2018-05-16 | Low noise ratchet type overrunning clutch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208331038U true CN208331038U (en) | 2019-01-04 |
Family
ID=64777589
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820729663.0U Active CN208331038U (en) | 2018-05-16 | 2018-05-16 | Low noise ratchet type overrunning clutch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208331038U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109878130A (en) * | 2019-03-28 | 2019-06-14 | 徐鑫珍 | A kind of pressure-limiting hand press machine |
| CN116392733A (en) * | 2023-03-27 | 2023-07-07 | 石家庄君安消防设备科技有限公司 | Automatic open protection slowly falls device that falls |
-
2018
- 2018-05-16 CN CN201820729663.0U patent/CN208331038U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109878130A (en) * | 2019-03-28 | 2019-06-14 | 徐鑫珍 | A kind of pressure-limiting hand press machine |
| CN116392733A (en) * | 2023-03-27 | 2023-07-07 | 石家庄君安消防设备科技有限公司 | Automatic open protection slowly falls device that falls |
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