CN217234181U - Clutch mechanism and gear motor - Google Patents
Clutch mechanism and gear motor Download PDFInfo
- Publication number
- CN217234181U CN217234181U CN202220759537.6U CN202220759537U CN217234181U CN 217234181 U CN217234181 U CN 217234181U CN 202220759537 U CN202220759537 U CN 202220759537U CN 217234181 U CN217234181 U CN 217234181U
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- China
- Prior art keywords
- shaft portion
- pole
- clutch mechanism
- cylindrical portion
- rotation axis
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Abstract
A clutch mechanism and a gear motor contribute to stably exert clutch force for a long time. The utility model discloses a clutch mechanism has: a first rotating body having a shaft portion, an outer peripheral side of the shaft portion being magnetized with an N pole and an S pole alternately in a circumferential direction around a rotation axis of the shaft portion; and a second rotating body that is rotatable about a rotation axis with respect to the first rotating body, and that has a cylindrical portion that is fitted over the shaft portion, the cylindrical portion facing the shaft portion at a distance from the shaft portion on the outside in the radial direction about the rotation axis, the cylindrical portion having an inner peripheral side in which an N pole and an S pole that at least partially overlap with an N pole and an S pole formed on the shaft portion in the extending direction of the rotation axis are alternately magnetized in the circumferential direction about the rotation axis.
Description
Technical Field
The utility model relates to a clutching mechanism and gear motor including this clutching mechanism.
Background
In a transmission configuration, a clutch mechanism is often used.
A conventional clutch mechanism often performs a clutch action based on a frictional force between members, and for example, patent document 1 discloses an overload protection mechanism that performs a clutch action based on a frictional force between an annular plate and a rotating member, and patent document 2 discloses a clutch mechanism that performs a clutch action based on a frictional force between a first rotating member and a second rotating member.
Patent document 1: japanese patent laid-open No. 2020-67168
Patent document 2: japanese patent laid-open publication No. H10-14170
However, in the case of a clutch mechanism that performs a clutch action based on a frictional force between members, the clutch action force is likely to be unstable due to wear of the members during long-term use, and the clutch action force may also be unstable when the clutch members are rotated relative to each other a plurality of times in a short time.
SUMMERY OF THE UTILITY MODEL
The present invention has been made in view of the above problems, and an object of the present invention is to provide a clutch mechanism and a gear motor that contribute to stably exerting clutch force for a long period of time.
In order to achieve the above object, the present invention provides a clutch mechanism, which has: a first rotating body having a shaft portion, an outer peripheral side of the shaft portion being magnetized with an N pole and an S pole alternately in a circumferential direction around a rotation axis of the shaft portion; and a second rotating body that is rotatable about a rotation axis of the shaft portion with respect to the first rotating body, and that has a cylindrical portion that is fitted over the shaft portion, the cylindrical portion facing the shaft portion at a distance from the shaft portion on the outside in a radial direction around the rotation axis, the cylindrical portion having an inner peripheral side in which an N pole and an S pole that at least partially overlap with each other in an axial direction that is an extending direction of the rotation axis, are alternately magnetized in the circumferential direction.
According to the utility model discloses a clutch mechanism has: a first rotating body having a shaft portion, an outer peripheral side of the shaft portion being magnetized with an N pole and an S pole alternately in a circumferential direction around a rotation axis of the shaft portion; and a second rotating body which is rotatable about a rotation axis of the shaft portion with respect to the first rotating body, and which has a cylindrical portion fitted over the shaft portion, the cylindrical portion facing the shaft portion at a distance from the outside in a radial direction with the rotation axis as a center, and an N pole and an S pole which are at least partially overlapped with an N pole and an S pole formed on the shaft portion in an axial direction which is an extending direction of the rotation axis being alternately magnetized in a circumferential direction on an inner peripheral side of the cylindrical portion, so that a clutch acting force is not unstable due to wear like a clutch mechanism which realizes a clutch action based on a frictional force even in long-term use, and the clutch acting force is not unstable even if the first rotating body and the second rotating body are relatively rotated many times in a short time, and use of a lubricating oil is also eliminated.
In the clutch mechanism of the present invention, it is preferable that an iron piece is fixed to an outer peripheral surface of the shaft portion, the iron piece facing the cylindrical portion with a space therebetween on the radially inner side, and at least partially overlapping with the N pole and S pole of the shaft portion and the N pole and S pole of the cylindrical portion in the axial direction.
According to the utility model discloses a clutch mechanism is fixed with the iron sheet at the outer peripheral face of axial region, and this iron sheet is relative at radial inboard and section of thick bamboo portion interval, and overlaps with the N utmost point and the S utmost point of axial region and the N utmost point and the S utmost point of section of thick bamboo portion at least part in the axial, consequently, helps strengthening the magnetic action that forms between the N utmost point and the S utmost point of axial region and the N utmost point and the S utmost point of section of thick bamboo portion, improves the separation and reunion effort.
In the clutch mechanism of the present invention, it is preferable that the iron piece is provided so as to surround the shaft portion in the circumferential direction.
According to the clutch mechanism of the present invention, the iron piece is provided around the shaft portion in the circumferential direction around the rotation axis, so that the magnetic force action between the N pole and the S pole formed on the shaft portion and the N pole and the S pole formed on the cylinder portion can be enhanced in a balanced manner in the circumferential direction.
In the clutch mechanism of the present invention, it is preferable that the iron plate is provided in plurality at intervals in the circumferential direction.
In the clutch mechanism of the present invention, it is preferable that the plurality of iron pieces are held by a cylindrical portion of a holder, and the cylindrical portion is fitted over the shaft portion and fixed to the shaft portion by press fitting.
In the clutch mechanism of the present invention, it is preferable that the holder has a first top plate portion that closes an opening of the cylindrical portion on one side in the axial direction, the second rotating body has a second top plate portion that closes an opening of the cylindrical portion on one side in the axial direction, and the first top plate portion is opposed to the second top plate portion with a spacer interposed therebetween on the other side in the axial direction.
In the clutch mechanism of the present invention, it is preferable that the number of N poles and S poles formed on the shaft portion is smaller than the number of N poles and S poles formed on the cylindrical portion.
In addition, in order to achieve the above object, the present invention provides a gear motor having a motor and a gear train that outputs rotation of the motor to the outside, wherein a clutch mechanism of any one of the above is provided on a transmission path of the gear train.
(Utility model effect)
According to the utility model discloses, clutching mechanism has: a first rotating body having a shaft portion, an outer peripheral side of the shaft portion being magnetized with an N pole and an S pole alternately in a circumferential direction around a rotation axis of the shaft portion; and a second rotating body which is rotatable around the rotation axis of the shaft portion with respect to the first rotating body, and which has a cylindrical portion fitted over the shaft portion, the cylindrical portion facing the shaft portion at a distance from the shaft portion on the outer side in the radial direction with the rotation axis as the center, and the inner peripheral side of the cylindrical portion being magnetized with N poles and S poles alternately in the circumferential direction so as to at least partially overlap with N poles and S poles formed on the shaft portion in the axial direction which is the extending direction of the rotation axis.
Drawings
Fig. 1 is a perspective view schematically showing a clutch mechanism according to an embodiment of the present invention.
Fig. 2 is a side view schematically showing a clutch mechanism according to an embodiment of the present invention.
Fig. 3 is a side sectional view schematically showing a clutch mechanism according to an embodiment of the present invention.
Fig. 4 is an exploded view schematically showing a clutch mechanism according to an embodiment of the present invention.
(symbol description)
1 Clutch mechanism
10 first rotating body
11 shaft part
111 shaft body
112 shaft magnet
12 iron sheet
13 holder
131 tubular part
132 first ceiling part
14 shim
15 cylindrical body
16 connecting part
17 main magnet
20 second rotating body
21 barrel part
211 barrel body
212 cylindrical magnet
22 second ceiling part
23 Gear section
L axis of rotation
Detailed Description
Next, a clutch mechanism according to an embodiment of the present invention will be described with reference to fig. 1 to 4, wherein fig. 1 is a perspective view schematically showing a clutch mechanism according to an embodiment of the present invention, fig. 2 is a side view schematically showing a clutch mechanism according to an embodiment of the present invention, fig. 3 is a side sectional view schematically showing a clutch mechanism according to an embodiment of the present invention, and fig. 4 is an exploded view schematically showing a clutch mechanism according to an embodiment of the present invention.
(Structure of Clutch mechanism)
As shown in fig. 1 to 3, the clutch mechanism 1 includes: a first rotating body 10 having a shaft portion 11, the outer peripheral side of the shaft portion 11 being magnetized with N-poles and S-poles alternately in a circumferential direction around a rotation axis L of the shaft portion 11; and a second rotating body 20 which is rotatable about the rotation axis L of the shaft portion 11 with respect to the first rotating body 10, and which has a cylindrical portion 21 fitted over the shaft portion 11, the cylindrical portion 21 facing the shaft portion 11 with a space therebetween on the outer side in the radial direction with respect to the rotation axis L, the inner peripheral side of the cylindrical portion 21 being alternately magnetized in the circumferential direction with respect to the rotation axis L to form N and S poles at least partially overlapping with N and S poles formed on the shaft portion 11 in the extending direction of the rotation axis L, that is, in the axial direction.
Here, as shown in fig. 3 and 4, the shaft portion 11 includes a shaft portion main body 111 and a shaft portion magnet 112, and the shaft portion magnet 112 has the above-described N pole and S pole alternately formed in the circumferential direction around the rotation axis L, and is formed by integral molding on the outer peripheral surface (upper side in fig. 3 and 4) of one end portion in the axial direction of the shaft portion main body 111.
As shown in fig. 3 and 4, the cylinder 21 includes a cylinder main body 211 and a cylinder magnet 212, and the shaft magnet 212 includes the N-pole and the S-pole alternately formed in the circumferential direction around the rotation axis L and is fixed to the inner circumferential surface of the cylinder main body 211 by adhesion.
As shown in fig. 3 and 4, an iron piece 12 is fixed to the outer peripheral surface of the shaft portion 11, and the iron piece 12 faces the cylindrical portion 21 at a distance from the inside in the radial direction and at least partially overlaps the N-pole and S-pole of the shaft portion 11 and the N-pole and S-pole of the cylindrical portion 21 in the axial direction. Preferably, the iron piece 12 overlaps the N-pole and S-pole of the shaft portion 11 and the N-pole and S-pole of the cylindrical portion 21 as a whole in the axial direction.
Further, the iron piece 12 is provided around the shaft portion in the circumferential direction around the rotation axis L. Specifically, as shown in fig. 3 and 4, the iron piece 12 is provided in plurality at intervals in the circumferential direction. More specifically, the plurality of iron pieces 12 are held by the cylindrical portion 131 of the holder 13 (for example, the iron pieces 12 are formed integrally with the holder 13 by resin insert molding), and the cylindrical portion 131 is fitted over the shaft portion 11 and fixed to the shaft portion 11 by press fitting. The holder 13 has a first top plate 132 that closes the opening on one side (upper side in fig. 3) in the axial direction of the cylindrical portion 131, the second rotor 20 has a second top plate 22 that closes the opening on one side (upper side in fig. 3) in the axial direction of the cylindrical portion 21, and the other side in the axial direction of the first top plate 132 faces the second top plate 22 with the spacer 14 interposed therebetween (for example, both sides of the first top plate 132 and the second top plate 22 in the axial direction contact the spacer 44). For example, a through hole is formed in the center of the spacer 14, and a protrusion that protrudes to one side in the axial direction and passes through the through hole is formed on one side in the axial direction of the shaft portion 11.
Further, for example, the number of N poles and S poles formed in the shaft portion 11 is smaller than the number of N poles and S poles formed in the cylindrical portion 21.
As shown in fig. 3, the first rotating body 10 further includes a cylindrical body 15 surrounding the shaft portion 11 on the outer peripheral side, and a connecting portion 16 connecting the cylindrical body 15 and the shaft portion 11. Further, a main magnet 17 is provided on the outer peripheral side of the tubular body 15.
Further, as shown in fig. 1 to 4, the second rotating body 20 has a gear portion 23, and the gear portion 23 protrudes from the second top plate portion 22 toward one side in the axial direction.
(operation of Clutch mechanism)
During operation, for example, when the first rotating body 10 rotates in one direction (for example, clockwise) around the rotation axis L, the second rotating body 10 rotates in one direction (for example, clockwise) around the rotation axis L following the first rotating body 10 due to a magnetic force action between the N-pole and the S-pole formed in the shaft portion 11 and the N-pole and the S-pole formed in the cylindrical portion 21 (attraction of the N-pole of the shaft portion 11 to the S-pole of the cylindrical portion 21, attraction of the S-pole of the shaft portion 11 to the N-pole of the cylindrical portion 21, repulsion of the N-pole of the shaft portion 11 to the N-pole of the cylindrical portion 21, and repulsion of the S-pole of the shaft portion 11 to the S-pole of the cylindrical portion 21).
On the other hand, for example, when the first rotating body 10 rotates in one direction (for example, clockwise direction) around the rotation axis L, if the torsional force acting on the second rotating body 10 in the other direction (for example, counterclockwise direction) around the rotation axis L is larger than the mutual attraction force between the first rotating body 10 and the second rotating body 29, the first rotating body 10 slips with respect to the second rotating body 20, and the overload protection is provided.
(main effects of the present embodiment)
The clutch mechanism 1 according to the present embodiment includes: a first rotating body 10 having a shaft portion 11, the outer peripheral side of the shaft portion 11 being magnetized with N-poles and S-poles alternately in a circumferential direction around a rotation axis L of the shaft portion 11; and a second rotating body 20 which is rotatable about the rotation axis L of the shaft portion 11 with respect to the first rotating body 10 and has a cylindrical portion 21 fitted over the shaft portion 11, the cylindrical portion 21 faces the shaft portion 11 at a distance in the radial direction outside the rotational axis L, the inner peripheral side of the cylindrical portion 21 is magnetized with N and S poles alternately in the circumferential direction around the rotation axis L, which at least partially overlap with N and S poles formed on the shaft portion 11 in the axial direction, which is the extending direction of the rotation axis L, and therefore, even if the clutch mechanism is used for a long time, the clutch acting force will not be unstable due to abrasion like the clutch mechanism realizing the clutch acting based on the friction force, and moreover, even if the first rotating body 10 and the second rotating body 20 relatively rotate a plurality of times in a short time, the clutch force is not unstable, and the use of lubricating oil can be avoided.
The present invention has been described above by way of example with reference to the accompanying drawings, and it is to be understood that the specific implementations of the present invention are not limited to the above-described embodiments.
For example, in the above-described embodiment, the clutch mechanism 1 may be applied to a gear motor having a motor and a gear train that outputs the rotation of the motor to the outside, and specifically, the clutch mechanism 1 may be provided on a transmission path of the gear train, for example.
In the above embodiment, the iron piece 12 is fixed to the outer peripheral surface of the shaft portion 11, but the present invention is not limited to this, and the iron piece 12 may be omitted in some cases.
In the above embodiment, the shaft portion 11 has the shaft portion main body 111 and the shaft portion magnet 112, the shaft portion magnet 112 has the above-described N pole and S pole alternately formed in the circumferential direction around the rotation axis L, and is formed by integral molding on the outer circumferential surface of one end portion in the axial direction of the shaft portion main body 111, the cylinder portion 21 has the cylinder portion main body 211 and the cylinder portion magnet 212, and the shaft portion magnet 212 has the above-described N pole and S pole alternately formed in the circumferential direction around the rotation axis L and is fixed to the inner circumferential surface of the cylinder portion main body 211 by adhesion, but the specific configurations of the shaft portion 11 and the cylinder portion 21 are not limited thereto, and may be appropriately changed as necessary.
In the above embodiment, the other side of the first top plate 132 in the axial direction faces the second top plate 22 with the spacer 14 interposed therebetween, but the present invention is not limited to this, and the spacer 14 may be omitted in some cases.
The number of N poles and S poles formed in the shaft portion 11 may be equal to or greater than the number of N poles and S poles formed in the cylindrical portion 21.
In the above embodiment, the shapes and configurations of the first rotating body 10 and the second rotating body 20 are not limited to those shown in the drawings, and may be appropriately changed as needed.
It should be understood that the present invention can freely combine the respective components in the embodiments or appropriately change or omit the respective components in the embodiments within the scope thereof.
Claims (8)
1. A clutch mechanism, comprising:
a first rotating body having a shaft portion, an outer peripheral side of the shaft portion being magnetized with an N pole and an S pole alternately in a circumferential direction around a rotation axis of the shaft portion; and
and a second rotating body that is rotatable about the rotation axis with respect to the first rotating body, and that has a cylindrical portion that is fitted over the shaft portion, the cylindrical portion facing the shaft portion at a distance from the shaft portion on the outside in the radial direction about the rotation axis, the cylindrical portion having an inner peripheral side in which an N pole and an S pole that at least partially overlap with an N pole and an S pole formed on the shaft portion in the axial direction that is the extending direction of the rotation axis are alternately magnetized in the circumferential direction.
2. The clutch mechanism of claim 1,
an iron piece is fixed to an outer peripheral surface of the shaft portion, faces the cylindrical portion at a distance inside the radial direction, and at least partially overlaps with the N-pole and S-pole of the shaft portion and the N-pole and S-pole of the cylindrical portion in the axial direction.
3. The clutch mechanism of claim 2,
the iron piece is arranged around the shaft portion in the circumferential direction.
4. The clutch mechanism of claim 3,
the iron piece is provided in plurality at intervals in the circumferential direction.
5. The clutch mechanism of claim 4,
a plurality of the iron pieces are held by the cylindrical portion of the holder,
the cylindrical portion is fitted over the shaft portion and is fixed to the shaft portion by press fitting.
6. The clutch mechanism of claim 5,
the holder has a first top plate portion that closes an opening of one side of the cylindrical portion in the axial direction,
the second rotating body has a second top plate portion that closes an opening on one side of the cylindrical portion in the axial direction,
the other side of the first top plate in the axial direction is opposite to the second top plate with a spacer interposed therebetween.
7. The clutch mechanism of claim 1,
the number of N poles and S poles formed on the shaft portion is smaller than the number of N poles and S poles formed on the cylindrical portion.
8. A gear motor is characterized by having a motor and a gear train outputting rotation of the motor to the outside,
a clutch mechanism as claimed in any one of claims 1 to 7 is provided on a transmission path of the gear train.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220759537.6U CN217234181U (en) | 2022-04-01 | 2022-04-01 | Clutch mechanism and gear motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220759537.6U CN217234181U (en) | 2022-04-01 | 2022-04-01 | Clutch mechanism and gear motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217234181U true CN217234181U (en) | 2022-08-19 |
Family
ID=82843695
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220759537.6U Active CN217234181U (en) | 2022-04-01 | 2022-04-01 | Clutch mechanism and gear motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217234181U (en) |
-
2022
- 2022-04-01 CN CN202220759537.6U patent/CN217234181U/en active Active
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| GR01 | Patent grant | ||
| GR01 | Patent grant |