CN219888559U - One-way clutch - Google Patents
One-way clutch Download PDFInfo
- Publication number
- CN219888559U CN219888559U CN202321136474.XU CN202321136474U CN219888559U CN 219888559 U CN219888559 U CN 219888559U CN 202321136474 U CN202321136474 U CN 202321136474U CN 219888559 U CN219888559 U CN 219888559U
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- CN
- China
- Prior art keywords
- pawl
- seat
- clutch
- ratchet
- groove
- 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.)
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- 230000002093 peripheral effect Effects 0.000 claims abstract description 4
- 238000013016 damping Methods 0.000 claims description 11
- 230000005540 biological transmission Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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- Mechanical Operated Clutches (AREA)
Abstract
The utility model discloses a one-way clutch, which comprises a ratchet wheel, a pawl assembly and a clutch seat; the ratchet is of a hollow structure, and a plurality of ratchets are formed on the inner wall of the ratchet; the pawl assembly comprises a pawl seat and a plurality of pawls, a plurality of pawl grooves are formed in the peripheral surface of the pawl seat, each pawl is rotatably arranged in each pawl groove, each pawl is provided with a rotating part and a meshing part connected with the rotating part, the meshing part of the pawl is movably meshed with each ratchet tooth of the ratchet wheel, and the pushing surface of each ratchet tooth is movably abutted against the outer side surface of the meshing part of each pawl; the end face of one side of the clutch seat is provided with a plurality of poking columns along the circumferential direction of the clutch seat, each poking column of the clutch seat is respectively inserted into each pawl groove of the pawl seat, and each poking column of the clutch seat is movably abutted against and matched with the inner side face of the meshing part of each pawl; the clutch seat and the ratchet wheel can rotate relatively and are positioned relatively in a matched manner. The one-way clutch can realize one-way clutch function and has better reliability.
Description
Technical Field
The utility model relates to the field of hubs, in particular to a one-way clutch.
Background
It is well known that in the part of the bicycle transmission, the hub has been present as an important element. The tower base of the hub is in one-way transmission fit with the hub main body of the hub through a one-way clutch.
The ratchet-pawl type one-way clutch is one of the forms of meshing type clutches, and mainly comprises a pawl assembly and a ratchet wheel arranged on the outer side of the pawl assembly, wherein the pawl assembly generally comprises a pawl seat, a pawl rotatably arranged on the pawl seat and a pawl spring for driving the pawl to be outwards expanded; when the hub tower foundation rotates positively, the pawl spring can enable the pawl to be meshed with the ratchet teeth of the ratchet wheel, so that the tower foundation can drive the hub main body to rotate; when the tower foundation of the flower drum rotates reversely, the ratchet teeth of the ratchet wheel are separated from the pawl, so that the flower drum rotates in an idle mode.
However, in the existing ratchet-pawl type one-way clutch, the pawl spring may loose or fatigue fail during the installation and working process, so that the engagement failure of the ratchet and the pawl is caused, and the structural reliability is not high.
Disclosure of Invention
The utility model aims to provide a one-way clutch with good reliability.
In order to achieve the above object, the solution of the present utility model is:
a one-way clutch comprising a ratchet, a pawl assembly and a clutch seat; the ratchet is of a hollow structure, the inner wall of the ratchet forms a plurality of ratchets, and the same side of each ratchet forms a pushing surface; the pawl assembly comprises a pawl seat and a plurality of pawls, the peripheral surface of the pawl seat is provided with a plurality of pawl grooves, each pawl is rotatably arranged in each pawl groove, each pawl is provided with a rotating part rotationally connected with the pawl seat and a meshing part connected with the rotating part, the meshing part of the pawl is movably meshed with each ratchet tooth of the ratchet wheel, and the pushing surface of the ratchet tooth is movably abutted against the outer side surface of the meshing part of each pawl; the end face of one side of the clutch seat is provided with a plurality of poking columns along the circumferential direction of the clutch seat, each poking column of the clutch seat is respectively inserted into each pawl groove of the pawl seat, and each poking column of the clutch seat is movably abutted against and matched with the inner side face of the meshing part of each pawl; the clutch seat and the ratchet wheel can rotate relatively and are positioned relatively in a matched manner.
The shifting column of the clutch seat is cylindrical.
The end part of the meshing part of the pawl is of an arc-shaped structure, and the end part of the meshing part of the pawl is movably meshed with the ratchet teeth of the ratchet wheel.
And an engagement groove matched with the end part of the engagement part of the pawl is formed between the adjacent ratchets of the ratchet wheel, and the engagement groove is of an arc-shaped structure.
The one-way clutch also comprises a friction disc; the friction disc is fixed on the ratchet wheel and is abutted against the clutch seat.
The clutch seat is provided with a first end face and a second end face, wherein the two opposite end faces of the clutch seat are respectively provided with the shifting column, and the second end face of the clutch seat is in contact with the friction disc.
The pawl seat is provided with a spring thimble which abuts against the first end face of the clutch seat.
And a damping piece which is abutted against the pawl rotating part is arranged in the pawl groove of the pawl seat.
The pawl groove of the pawl seat is internally provided with an embedding groove, and the damping piece is embedded in the embedding groove.
The pawl groove of the pawl seat is internally provided with a rotating groove communicated with the caulking groove, and the rotating part of the pawl is rotatably accommodated in the rotating groove.
After the scheme is adopted, when the pawl seat rotates forwards relative to the ratchet wheel, the clutch seat is matched with the ratchet wheel in a relative positioning way so that the pawl seat rotates reversely relative to the clutch seat, and the shifting column of the clutch seat pushes against the inner side surface of the meshing part of the pawl to drive the pawl to turn outwards, so that the meshing part of the pawl is meshed with the ratchet wheel of the ratchet wheel, and at the moment, the one-way clutch is in a locking state, and the pawl seat can drive the ratchet wheel to synchronously rotate forwards; when the pawl seat rotates reversely relative to the ratchet wheel, the ratchet wheel pushing surface of the ratchet wheel pushes the outer side surface of the meshing part of the pawl to drive the pawl to turn inwards, so that the meshing part of the pawl is disengaged from the ratchet wheel of the ratchet wheel, and meanwhile, the pawl pushes the shifting column of the clutch seat to enable the clutch seat to rotate reversely relative to the pawl seat and the ratchet wheel.
From the above, the one-way clutch of the present utility model can realize one-way clutch function, and the present utility model does not need to use a spring, so that the one-way clutch of the present utility model can realize stable engagement, and has better reliability.
Drawings
Fig. 1 is an exploded view of the structure of the present utility model.
Fig. 2 is a schematic structural view of the present utility model (engaged state).
Fig. 3 is a schematic diagram of the second embodiment of the present utility model (idle state).
Fig. 4 is a cross-sectional view of the present utility model.
Description of the reference numerals:
ratchet 1, ratchet 11, pushing surface 111, engagement groove 12,
pawl assembly 2. A pawl seat 21. Pawl slot 211, caulking slot 2111, rotation slot 2112, pawl 22, rotation portion 221, engagement portion 222, damper 23, spring thimble 24,
clutch base 3, first end face 301, second end face 302, dial column 31,
friction disc 4.
Detailed Description
In order to further explain the technical scheme of the utility model, the utility model is explained in detail by specific examples.
As shown in fig. 1 to 4, the present utility model discloses a one-way clutch including a ratchet 1, a pawl assembly 2 and a clutch base 3; wherein, the ratchet wheel 1 is of a hollow structure, a plurality of ratchets 11 are formed on the inner wall of the ratchet wheel 1, and the same side of each ratchet 11 forms a pushing surface 111; the pawl assembly 2 comprises a pawl seat 21 and a plurality of pawls 22, wherein a plurality of pawl grooves 211 are formed in the peripheral surface of the pawl seat 21, each pawl 22 is rotatably arranged in each pawl groove 211, each pawl 22 is provided with a rotating part 221 which is rotatably connected with the pawl seat 21 and a meshing part 222 which is connected with the rotating part 221, the meshing part 222 of the pawl 22 is movably meshed with each ratchet tooth 11 of the ratchet 1, and a pushing surface 111 of each ratchet tooth 11 is movably abutted against the outer side surface of the meshing part 221 of each pawl 22; the end surface of one side of the clutch seat 3 is provided with a plurality of poking columns 31 along the circumferential direction of the clutch seat 3, each poking column 31 of the clutch seat 3 is respectively inserted into each pawl groove 211 of the pawl seat 21, and each poking column 31 of the clutch seat 3 is movably abutted against and matched with the inner side surface of the meshing part 222 of each pawl 22; the clutch seat 3 and the ratchet wheel 1 can rotate relatively and are positioned relatively in a matched manner.
The working principle of the utility model is as follows: when the pawl seat 21 rotates forward relative to the ratchet wheel 1, the clutch seat 3 is matched with the ratchet wheel 1 relatively to enable the pawl seat 21 to rotate reversely relative to the clutch seat 3, so that the shifting column 31 of the clutch seat 3 pushes against the inner side surface of the meshing part 222 of the pawl 22 to drive the pawl 22 to turn outwards, and further the meshing part 222 of the pawl 22 is meshed with the ratchet teeth 11 of the ratchet wheel 1, at the moment, the one-way clutch is in a locking state, and the pawl seat 21 can drive the ratchet wheel 1 to synchronously rotate forward; when the pawl seat 21 rotates reversely relative to the ratchet wheel 1, the pushing surface 111 of the ratchet 11 of the ratchet wheel 1 pushes the outer side surface of the meshing part 222 of the pawl 22 to drive the pawl 22 to turn inwards, so that the meshing part 222 of the pawl 22 is disengaged from the ratchet 11 of the ratchet wheel 1, and meanwhile, the pawl 22 pushes the shifting post 31 of the clutch seat 3 to enable the clutch seat 3 to rotate reversely relative to the pawl seat 21 and the ratchet wheel 1, at the moment, the one-way clutch of the utility model is in an idle state, and the pawl seat 21 can rotate reversely relative to the ratchet wheel 1. From the foregoing, the one-way clutch of the present utility model can realize one-way clutch function, and the present utility model does not need to use a spring, so that the one-way clutch of the present utility model can realize stable engagement, and the reliability is better; in addition, compared with the existing ratchet-pawl type one-way clutch adopting a pawl spring, the utility model has lower noise and lower idle running resistance.
In the embodiment of the utility model, the end of the engaging portion 222 of the pawl 22 may have an arc structure, and the end of the engaging portion 222 of the pawl 22 is movably engaged with the ratchet 11 of the ratchet 1. And the engaging groove 12 adapted to the end of the engaging portion 222 of the pawl 22 is formed between the adjacent ratchet teeth 11 of the ratchet 1, so that the engaging portion 222 of the pawl 22 has a large contact area with the ratchet 11 when engaged, and the engaging of the pawl 22 with the ratchet 11 is more stable and reliable, and the engaging groove 11 can have an arc-shaped structure. In addition, the shifting column 31 of the clutch seat 3 is cylindrical, and the utility model can avoid the problem that the shifting column 31 and the pawl 22 are blocked.
In the embodiment of the present utility model, the pawl slot 211 of the pawl seat 21 is provided with a damping member 23 that abuts against the rotating portion 221 of the pawl 22, and the damping member 23 can provide the rotation damping of the pawl 22; when the pawl seat 21 rotates reversely relative to the ratchet wheel 1, the pushing surface 111 of the ratchet 11 of the ratchet wheel 1 pushes against the outer side surface of the engaging portion 222 of the pawl 22 to drive the pawl 22 to turn inwards, and the damping piece 23 dampens the rotation provided by the rotating portion 221 of the pawl 22 to keep the pawl 22 in the inwards turned state, so that the pawl 22 can keep a state separated from the ratchet wheel 1, and noise of the one-way clutch in the idle state is generated. Wherein, the pawl slot 211 of the pawl seat 21 is internally provided with an embedded slot 2111, and the damping piece 23 is embedded in the embedded slot 2111, so that the damping piece 23 is simply assembled; the pawl groove 211 of the pawl seat 21 is provided with a rotating groove 2112 communicated with the caulking groove 2111, and the rotating portion 221 of the pawl 22 is rotatably accommodated in the rotating groove 2112, so that the damping member 23 can abut against the rotating portion 221 of the pawl 22.
In an embodiment of the present utility model, the one-way clutch of the present utility model may further include a friction plate 4; the friction disc 4 is fixed on the ratchet 11, the friction disc 4 is in contact with the clutch seat 3 to provide rotating friction force for the clutch seat 3, the friction disc 4 can enable the clutch seat 3 and the ratchet 1 to rotate relatively and be positioned relatively in a matched manner, and then the shifting column 31 of the clutch seat 3 can push against the inner side face of the meshing part 222 of the pawl 22. The two opposite end surfaces of the clutch seat 3 are a first end surface 301 and a second end surface 302, the first end surface 301 of the clutch seat 3 is provided with the poking column 31, the second end surface 302 of the clutch seat 3 is abutted against the friction disc 4, and therefore the contact area of the clutch seat 3 and the friction disc 4 is large, and the rotating friction force between the clutch seat 3 and the friction disc 4 can be effectively improved. In addition, the pawl seat 21 is provided with a spring thimble 24 abutting against the first end surface 301 of the clutch seat 3, the spring thimble 24 drives the second end surface 302 of the clutch seat 3 to tightly abut against the friction disk 4, so that the rotating friction force between the clutch seat 3 and the friction disk 4 can be effectively improved, and meanwhile, the spring thimble 24 drives the pawl 22 and the first end surface 301 of the clutch seat 3 to form a gap, so that noise is reduced.
The above examples and drawings are not intended to limit the form or form of the present utility model, and any suitable variations or modifications thereof by those skilled in the art should be construed as not departing from the scope of the present utility model.
Claims (10)
1. A one-way clutch, characterized by: comprises a ratchet wheel, a pawl component and a clutch seat;
the ratchet is of a hollow structure, the inner wall of the ratchet forms a plurality of ratchets, and the same side of each ratchet forms a pushing surface;
the pawl assembly comprises a pawl seat and a plurality of pawls, the peripheral surface of the pawl seat is provided with a plurality of pawl grooves, each pawl is rotatably arranged in each pawl groove, each pawl is provided with a rotating part rotationally connected with the pawl seat and a meshing part connected with the rotating part, the meshing part of the pawl is movably meshed with each ratchet tooth of the ratchet wheel, and the pushing surface of the ratchet tooth is movably abutted against the outer side surface of the meshing part of each pawl;
the end face of one side of the clutch seat is provided with a plurality of poking columns along the circumferential direction of the clutch seat, each poking column of the clutch seat is respectively inserted into each pawl groove of the pawl seat, and each poking column of the clutch seat is movably abutted against and matched with the inner side face of the meshing part of each pawl; the clutch seat and the ratchet wheel can rotate relatively and are positioned relatively in a matched manner.
2. The one-way clutch according to claim 1, wherein: the shifting column of the clutch seat is cylindrical.
3. The one-way clutch according to claim 1, wherein: the end part of the meshing part of the pawl is of an arc-shaped structure, and the end part of the meshing part of the pawl is movably meshed with the ratchet teeth of the ratchet wheel.
4. A one-way clutch as described in claim 3, wherein: and an engagement groove matched with the end part of the engagement part of the pawl is formed between the adjacent ratchets of the ratchet wheel, and the engagement groove is of an arc-shaped structure.
5. The one-way clutch according to claim 1, wherein: the friction plate is also included; the friction disc is fixed on the ratchet wheel and is abutted against the clutch seat.
6. The one-way clutch according to claim 5, wherein: the clutch seat is provided with a first end face and a second end face, wherein the two opposite end faces of the clutch seat are respectively provided with the shifting column, and the second end face of the clutch seat is in contact with the friction disc.
7. The one-way clutch according to claim 6, wherein: the pawl seat is provided with a spring thimble which abuts against the first end face of the clutch seat.
8. The one-way clutch according to claim 1, wherein: and a damping piece which is abutted against the pawl rotating part is arranged in the pawl groove of the pawl seat.
9. The one-way clutch according to claim 8, wherein: the pawl groove of the pawl seat is internally provided with an embedding groove, and the damping piece is embedded in the embedding groove.
10. The one-way clutch according to claim 9, wherein: the pawl groove of the pawl seat is internally provided with a rotating groove communicated with the caulking groove, and the rotating part of the pawl is rotatably accommodated in the rotating groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321136474.XU CN219888559U (en) | 2023-05-12 | 2023-05-12 | One-way clutch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321136474.XU CN219888559U (en) | 2023-05-12 | 2023-05-12 | One-way clutch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219888559U true CN219888559U (en) | 2023-10-24 |
Family
ID=88397433
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321136474.XU Active CN219888559U (en) | 2023-05-12 | 2023-05-12 | One-way clutch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219888559U (en) |
-
2023
- 2023-05-12 CN CN202321136474.XU patent/CN219888559U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |