CN214534147U - Electromagnetic clutch - Google Patents
Electromagnetic clutch Download PDFInfo
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- CN214534147U CN214534147U CN202022984420.1U CN202022984420U CN214534147U CN 214534147 U CN214534147 U CN 214534147U CN 202022984420 U CN202022984420 U CN 202022984420U CN 214534147 U CN214534147 U CN 214534147U
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- electromagnetic clutch
- fixing portion
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Abstract
The utility model provides an electromagnetic clutch. An electromagnetic clutch according to an embodiment includes: an armature that receives power of a driving source to rotate, the armature being supported to be movable in an axial direction thereof; a rotor fixing portion formed in a cylindrical shape having one end open in an axial direction and the other end closed; a rotor rotatably supported by the rotor fixing portion, the rotor being coaxial with the armature; a toroidal coil that forms a magnetic path through the rotor and the armature in an energized state, and causes the armature to be attracted to the rotor; and a damper portion sandwiched between a radially outer side of the annular coil and a radially inner side of the rotor fixing portion. Through the utility model discloses, can restrain the idle time of the output shaft of electromagnetic clutch when switching to non-energized state from the energized state.
Description
Technical Field
The utility model discloses an embodiment relates to an electromagnetic clutch.
Background
In the related art, an electromagnetic clutch is known as a drive transmission switching unit in a drive system. The electromagnetic clutch changes the engagement state of the clutch by changing the on/off of the current, thereby realizing the switching of the driving force.
However, there is a problem that when switching from an energized state in which the electromagnetic clutch performs transmission of the driving force to a non-energized state in which the driving force is not transmitted, the electromagnetic clutch has a long idle time due to inertia of the driving system, and the idle time before the output shaft of the electromagnetic clutch stops every time is different depending on the state of the load, so that it is difficult to ensure the stop accuracy.
SUMMERY OF THE UTILITY MODEL
The utility model provides a can restrain the electromagnetic clutch of the idle running time of the output shaft when switching from the on state to the off state.
An electromagnetic clutch according to an embodiment includes: an armature that receives power of a driving source to rotate, the armature being supported to be movable in an axial direction thereof; a rotor fixing portion formed in a cylindrical shape having one end open in an axial direction and the other end closed; a rotor rotatably supported by the rotor fixing portion, the rotor being coaxial with the armature; a toroidal coil that forms a magnetic path through the rotor and the armature in an energized state, and causes the armature to be attracted to the rotor; and a damper portion sandwiched between a radially outer side of the annular coil and a radially inner side of the rotor fixing portion.
Through the utility model discloses, can restrain the idle time of the output shaft of electromagnetic clutch when switching to non-energized state from the energized state.
Drawings
Fig. 1 is a schematic structural view of an electromagnetic clutch according to the present invention.
Detailed Description
Hereinafter, an electromagnetic clutch according to an embodiment will be described with reference to the drawings. In the drawings, the same components are denoted by the same reference numerals. For convenience of explanation, coordinate axes are shown in the drawings. The X-axis direction is a lateral direction (hereinafter also referred to as an axial direction) of the electromagnetic clutch. The Y-axis direction is a longitudinal direction (hereinafter also referred to as a radial direction) of the electromagnetic clutch. The Z-axis direction is a depth direction of the electromagnetic clutch (hereinafter, also referred to as a radial direction). The direction of the electromagnetic clutch facing the X-axis arrow is the right side, the direction of the electromagnetic clutch facing the Y-axis arrow is the upper side, the direction of the electromagnetic clutch facing the Z-axis arrow (toward the back side in fig. 1) is the rear side, and the left side, the lower side, and the front side are opposite to the above. The X, Y and Z directions are orthogonal to each other. In the drawings, the structure is shown enlarged, reduced, or omitted as appropriate for convenience of explanation.
Fig. 1 is a schematic structural diagram of an electromagnetic clutch 1 according to the present invention. In fig. 1, a dividing line F parallel to the Y-axis direction divides the electromagnetic clutch 1 into A, B parts, and in the axial direction (X-axis direction) of the electromagnetic clutch 1, a driving side a on the right side (+ X direction) of the dividing line F transmits driving force, and a driven side B on the left side (-X direction) of the dividing line F intermittently receives driving force. In the present embodiment, the driving side a of the electromagnetic clutch 1 transmits a driving force to the rotor 13 of the driven side B via the armature 11. The driven side B of the electromagnetic clutch 1 receives the driving force transmitted from the armature 11 of the driving side a via the rotor 13. When the electromagnetic clutch 1 is in a non-energized state, power is not transmitted, and the armature 11 on the driving side a and the rotor 13 on the driven side B are spaced apart from each other by a predetermined distance in the axial direction (X-axis direction). When the electromagnetic clutch 1 is in the energized state, power is transmitted, and at this time, the armature 11 on the driving side a is attracted to the rotor 13 on the driven side B and is attached to the rotor 13. Solid arrows on the driving side a in fig. 1 indicate the rotational directions of the respective power transmission members on the driving side a on the power transmission path when the drive source 2 inputs power. The broken-line arrow in fig. 1 at the driven side B indicates the rotational direction of the power transmission member at the driven side B on the power transmission path when the electromagnetic clutch 1 is energized. When the electromagnetic clutch 1 is not energized, the power transmission members on the driven side B do not rotate.
In the following description, in order to more clearly explain the power transmission of the electromagnetic clutch 1, fig. 1 also shows a drive source 2 located on the upstream side in the power transmission direction with respect to the electromagnetic clutch 1 and an output shaft 3 located on the downstream side in the power transmission direction with respect to the electromagnetic clutch 1. The drive source 2 is a driving member that transmits a driving force to the electromagnetic clutch 1, the drive source 2 always transmits the driving force to the electromagnetic clutch 1, and the drive source 2 is, for example, an electric motor, a motor, or the like. The output shaft 3 intermittently receives the driving force transmitted from the electromagnetic clutch 1, the output shaft 3 extending along an axis C parallel to the X-axis direction as shown in fig. 1, the output shaft 3 serving as an intermittently driven portion that takes in the driving force from the driving source 2.
First, a configuration of the drive source 2 will be exemplarily described. In the present embodiment, the drive source 2 is configured by the input shaft 20, the first gear 21, and the second gear 22, the drive force output from the drive source 2 is transmitted to the electromagnetic clutch 1 in the power transmission direction sequentially via the input shaft 20, the first gear 21, and the second gear 22, and the torque of the drive force transmitted from the input shaft 20 is changed by the first gear 21 and the second gear 22 so as to adapt to a situation in which the torque needs to be changed.
The above-described configuration of the driving source 2 is merely an exemplary description, and the present invention is not limited to the configuration of the driving source 2, as long as the driving source 2 can maintain a configuration capable of transmitting a suitable torque to the electromagnetic clutch 1 in the power transmission direction. For example, when it is not necessary to change the torque transmitted to the input shaft 20, the drive source 2 may be constituted only by the input shaft 20, and in this case, the drive force is directly transmitted to the armature 11 via the input shaft 20, and the input shaft 20 directly drives the armature 11 to rotate. By transmitting the driving force to the armature 11 between the input shafts 20, the number of parts can be reduced, and the power can be transmitted without loss as much as possible.
The configuration of any one of the drive sources 2 is described as an example, and the present invention is not limited to the configuration of any one of the drive sources 2, as long as the drive source 2 can maintain a configuration capable of transmitting a suitable torque to the electromagnetic clutch 1 in the power transmission direction. For example, when the electromagnetic clutch 1 is installed in a scene that can be easily disassembled and replaced, and the torque transmitted from the input shaft 20 needs to be changed to different degrees according to different load conditions, more transmission components can be added in the power transmission direction, the required gear ratio can be calculated according to specific required working conditions, and switching components such as shifting forks are appropriately arranged among partial gears. The power transmitted from the input shaft 20 can obtain various gear transmission relations before reaching the armature 11, and the function of transmitting different torques according to different working conditions is realized.
Next, the structure of the electromagnetic clutch 1 according to the present embodiment will be described with reference to fig. 1. To describe the structure of the electromagnetic clutch 1 more clearly, the drive source 2 is in a state of always transmitting the drive force to the electromagnetic clutch 1, and the electromagnetic clutch 1 transmits the drive force to the output shaft 3 in the energized state and does not transmit the drive force to the output shaft 3 in the non-energized state.
As shown in fig. 1, in the present embodiment, the electromagnetic clutch 1 is configured by an armature 11, a rotor fixing portion 12, a rotor 13, a toroidal coil 14, and a damper portion 15.
The rotor fixing portion 12 of the electromagnetic clutch 1 is formed in a cylindrical shape having one end (left end portion, -X side end portion) opened and the other end (right end portion, + X side end portion) closed in the axial direction (X axis direction). The rotor fixing portion 12 is rotatably supported by a bearing, not shown. The rotor fixing portion 12 is provided coaxially with the output shaft 3 (both are the axis C), the rotor fixing portion 12 and the output shaft 3 are relatively fixed, and the output shaft 3 rotates together with the rotor fixing portion 12 when the rotor fixing portion 12 rotates.
As an example of the rotor fixing portion 12 being formed in a cylindrical shape having one end (left end portion, -X side end portion) opened in the axial direction (X axis direction) and the other end (right end portion, + X side end portion) closed, as shown in fig. 1, in the present embodiment, the rotor fixing portion 12 has a hollow cylindrical inner ring 121 capable of being fitted over the output shaft 3 of the output power, and the inner ring 121 is a hollow shaft body formed around the axis C. The rotor fixing portion 12 has a cylindrical outer ring 122 located radially outside the inner ring 121 and coaxial with the inner ring 121 with a certain distance from the inner ring 121 in the radial direction, the outer ring 122 and the inner ring 121 are continuous via a closing flange 123, the closing flange 123 extends radially from a right side end (+ X direction) in the axial direction (X axis direction) of the cylindrical inner ring 121 toward a right side end (+ X direction) in the axial direction (X axis direction) of the cylindrical outer ring 122, and the closing flange 123 closes the right side end (+ X direction) in the axial direction (X axis direction) of the rotor fixing portion 12. The closed flange 123 serves as an intermediate magnetic pole, and integrally connects a right end (+ X direction) in the axial direction (X axis direction) of the outer ring 122 and a right end (+ X direction) in the axial direction (X axis direction) of the inner ring 121. The dimension of the closing flange 123 formed in the axial direction (X-axis direction) is smaller than the dimension of the inner ring 121 and the outer ring 122 formed in the axial direction (X-axis direction), and a hollow receiving portion 124 is formed between the radially outer side of the inner ring 121 and the radially inner side of the outer ring 122. The left side (-X end) of the housing portion 124 in the axial direction (X axis direction) is an open end. The rotor fixing portion 12 is thereby formed into a cylindrical shape having one end (left end portion, -X side end portion) open and the other end (right end portion, + X side end portion) closed in the axial direction (X axis direction).
In order to reduce the weight of the rotor fixing portion 12 and improve the utilization rate of the driving force, the rotor fixing portion 12 may be directly fitted over the output shaft 3 by fitting the sealing flange 123 over the inner ring 121.
The rotor 13 of the electromagnetic clutch 1 is generally formed of a magnetic material, and as shown in fig. 1, the rotor 13 is formed in a ring shape with a hole formed in the center. The dimension of the rotor 13 formed in the axial direction (X-axis direction) is smaller than the dimension of the rotor fixing portion 12 formed in the axial direction (X-axis direction). The rotor 13 is coaxial (all of the axes C) with an armature 11, an inner ring 121, an outer ring 122, and a closing flange 123 of the rotor fixing portion 12, which will be described later. The rotor 13 has a through opening formed at the radial center thereof, the through opening allowing the inner ring 121 of the rotor fixing portion 12 and the output shaft 3 to pass through, and the rotor 13 is fitted to the radially outer side of the cylindrical inner ring 121 of the rotor fixing portion 12 (in the case where the inner ring 121 is not provided, the rotor 13 is directly fitted to the radially outer side of the output shaft 3). An end surface of the rotor 13 on the left side (-X direction) in the axial direction (X axis direction) is fixed to an end surface of the closing flange 123 of the rotor fixing portion 12 facing the right side (+ X direction) in the axial direction (X axis direction). The rotor 13 is fixed relative to the closing flange 123, and when the rotor 13 rotates, the rotor fixing portion 12 rotates together with the rotor 13 via the closing flange 123, that is, the rotor 13 is rotatably supported by the rotor fixing portion 2. An end surface on the right side (+ X direction) in the axial direction (X axis direction) of the rotor 13 is a magnetic joint surface that can be magnetically joined to the armature 11 described later. An end surface of the rotor 13 on the right side (+ X direction) in the axial direction (X axis direction) is a flat surface.
The armature 11 of the electromagnetic clutch 1 is formed of a magnetic material, and as shown in fig. 1, the armature 11 is formed in a ring shape with a hole at the center. The dimension of the armature 11 formed in the axial direction (X-axis direction) is smaller than the dimension of the rotor fixing portion 12 formed in the axial direction (X-axis direction), and the dimension of the armature 11 formed in the axial direction (X-axis direction) is substantially the same as the dimension of the rotor 13 formed in the axial direction (X-axis direction). The armature 11 has an inner diameter and an outer diameter that match one end surface of the right side (+ X direction) in the axial direction (X axis direction) of the rotor 13. The armature 11 faces the rotor 13 fixed to the closing flange 123 of the rotor fixing portion 12 in the axial direction (X-axis direction). Specifically, the armature 11 is disposed in such a manner that an end surface facing the left side (-X direction) in the axial direction (X axis direction) is spaced apart from an end surface facing the right side (+ X direction) in the axial direction (X axis direction) of the rotor 13 by a certain distance. The armature 11 is supported by a bearing, not shown, so as to be rotatable about the axis C. The armature 11 is coaxial (all of axis C) with the inner ring 121, the outer ring 122, the closing flange 123, and the rotor 13 of the rotor fixing portion 12. A through opening is formed at the radial center of the armature 11, and the inner ring 121 of the rotor fixing portion 12 and the output shaft 3 are passed through the through opening. The armature 11 is fitted to the radially outer side of the cylindrical inner ring 121 of the rotor fixing portion 12 (in the case where the inner ring 121 is not provided, the armature 11 is directly fitted to the radially outer side of the output shaft 3). The left-side (-X direction) end surface of the armature 11 in the axial direction (X axis direction) and the right-side (+ X direction) end surface of the rotor 13 in the axial direction (X axis direction) are disposed to face each other with a slight gap therebetween. The armature 11 is supported so as to be movable in the axial direction (X-axis direction) thereof. An end surface on the left side (-X direction) in the axial direction (X axis direction) of the armature 11 is a magnetic joint surface that can magnetically join the rotor 13. The end surface of the armature 11 on the left side in the axial direction (X-axis direction) (-X direction) is a flat surface. The armature 11 is supported to be able to receive power of the drive source 2 to rotate about the axis C.
The driving force of the driving source 2 described above is transmitted to the electromagnetic clutch 1 via the input shaft 20, the first gear 21, and the second gear 22. As shown in fig. 1, in the present embodiment, an example is exemplarily shown in which an end surface of a right side (+ X direction) in the axial direction (X axis direction) of the armature 11 is fixed to an end surface of a left side (-X direction) in the axial direction (X axis direction) of the second gear 22 of the drive source 2. The first gear 21 is rotated by the power transmitted from the driving source 2 via the input shaft 20, the second gear 22 engaged with the first gear 21 is rotated by the first gear 21, and the armature 11 fixed to the second gear 22 is rotated by the second gear 22.
The toroidal coil 14 of the electromagnetic clutch 1 is a ring-shaped wire winding formed by winding wires one by one. As shown in fig. 1, the annular coil 14 is formed in a ring shape with a hole at the center. The dimension of the toroidal coil 14 formed in the axial direction (X-axis direction) is smaller than the dimension of the rotor fixing portion 12 formed in the axial direction (X-axis direction), and the dimension of the toroidal coil 14 formed in the axial direction (X-axis direction) is larger than the dimension of the rotor 13 formed in the axial direction (X-axis direction). The inner diameter of the toroidal coil 14 is substantially the same as the inner diameters of the rotor 13 and the armature 11, and the outer diameter of the toroidal coil 14 is smaller than the inner diameter of the outer ring 122 of the rotor fixing portion 12. An end surface of the ring coil 14 on the right side (+ X direction) in the axial direction (X axis direction) faces an end surface of the closing flange 123 of the rotor fixing portion 12 on the left side (-X direction) in the axial direction (X axis direction). The toroidal coil 14 is coaxial (all of axis C) with the inner ring 121, the outer ring 122, the closing flange 123, and the rotor 13 of the rotor fixing portion 12. The toroidal coil 14 is fixedly supported in a manner non-rotatable about the axis C. A through opening is formed at the radial center of the toroidal coil 14, and the inner ring 121 of the rotor fixing portion 12 and the output shaft 3 are passed through the through opening. The toroidal coil 14 is fitted on the radially outer side of the cylindrical inner ring 121 of the rotor fixing portion 12 (in the case where the inner ring 121 is not provided, the toroidal coil 14 is directly fitted on the radially outer side of the output shaft 3). The toroidal coil 14 is housed inside the outer ring 122 of the rotor fixing portion 12 in the radial direction, and the outside of the toroidal coil 14 in the radial direction is covered with the outer ring 122 of the rotor fixing portion 12. That is, the toroidal coil 14 is housed in a housing portion 124 formed by the outer ring 122 and the inner ring 121 of the rotor fixing portion 12, and the toroidal coil 14 is positioned between the radially inner side of the outer ring 122 and the radially outer side of the inner ring 121. The toroidal coil 14 is received in the receiving portion 124 from one end (left end portion, -X side end portion) of the rotor fixing portion 12 where an opening is formed. The toroidal coil 14 is not in contact with the rotor fixing portion 12, and the toroidal coil 14 is held stationary while the rotor fixing portion 12 rotates.
The toroidal coil 14 forms a magnetic circuit in the energized state. The magnetic circuit generates an attractive force via the rotor 13 and the armature 11, which electromagnetically attracts a left-side end (-X direction) of the armature 11 in the axial direction (X axis direction) to a right-side end (+ X direction) of the rotor 13 in the axial direction (X axis direction). The armature 11 and the rotor 13 are no longer spaced apart in the axial direction (X-axis direction) by a certain distance due to adsorption. At this time, the rotational force of the armature 11 can be transmitted to the rotor 13.
The toroidal coil 14 does not generate a magnetic path when not energized, and the magnetic path passing through the rotor 13 and the armature 11 disappears, and the left-side end portion (-X direction) in the axial direction (X axis direction) of the armature 11 loses the attractive force electromagnetically attracted to the right-side end portion (+ X direction) in the axial direction (X axis direction) of the rotor 13. The armature 11 and the rotor 13 are restored to a state of being spaced apart by a certain distance in the axial direction (X-axis direction). At this time, the rotational force of the armature 11 cannot be transmitted to the rotor 13.
Next, a case where the electromagnetic clutch 1 of the present embodiment is switched between the energized state and the non-energized state will be described with reference to fig. 1.
In the present embodiment, as shown in fig. 1, the driving source 2 is described by way of example in such a manner that the driving source 2 transmits driving force to the electromagnetic clutch 1 via the input shaft 20, the first gear 21, and the second gear 22, and that the side where the armature 11 and the driving source 2 are located is the driving side a, and the side where the rotor fixing portion 12, the rotor 13, and the toroidal coil 14 are located is the driven side B, with the dividing line F as a boundary.
In the present embodiment, the electromagnetic clutch 1 supplies current to the ring coil 14 by a control device not shown and an external power source not shown in the drawings in the energized state, and the electromagnetic clutch 1 does not supply current to the ring coil 14 in the non-energized state.
As shown in fig. 1, when the electromagnetic clutch 1 is in a non-energized state, the driving force of the driving source 2 is transmitted to the armature 11 via the input shaft 20, the first gear 21, and the second gear 22, and the armature 11 starts to rotate about the axis C.
At this time, no current is supplied to the toroidal coil 14 of the electromagnetic clutch 1, and therefore no magnetic path is generated between the rotor 13 and the armature 11 by the toroidal coil 14, and the left side (-X direction) end in the axial direction (X axis direction) of the armature 11 is in a state of being spaced from the right side (+ X direction) end in the axial direction (X axis direction) of the rotor 13 by a predetermined distance as shown in fig. 1. The rotational force of the armature 11 cannot be transmitted to the rotor 13.
When the electromagnetic clutch 1 is switched from the non-energized state to the energized state, the driving force of the driving source 2 is transmitted to the armature 11 via the input shaft 20, the first gear 21, and the second gear 22 in accordance with the non-energized state of the electromagnetic clutch 1, and the armature 11 rotates about the axis C.
At this time, a current is supplied to the toroidal coil 14 by a control device not shown and an external power supply not shown, and the toroidal coil 14 generates a magnetic path passing through the rotor 13 and the armature 11, and the magnetic path generates an attractive force causing an end portion on the left side (-X direction) in the axial direction (X axis direction) of the armature 11 to be electromagnetically attracted to an end portion on the right side (+ X direction) in the axial direction (X axis direction) of the rotor 13 via the rotor 13 and the armature 11. The armature 11 and the rotor 13 are tightly fitted together in the axial direction (X-axis direction) due to the attraction. The state in which the armature 11 is engaged with the rotor 13 is referred to as a magnetic force connection state. The rotor 13 rotates together with the armature 11 after attracting the armature 11. The rotational force of the armature 11 can be transmitted to the rotor 13.
As a result, the rotor 13 is rotated about the axis C by the armature 11, the rotor 13 rotates the rotor fixing portion 12 about the axis C, and the rotor fixing portion 12 rotates the output shaft 3 about the axis C. That is, when the electromagnetic clutch 1 is in the energized state, the electromagnetic clutch 1 realizes a function of transmitting the power of the drive source 2 to the output shaft 3.
When the electromagnetic clutch 1 is switched from the energized state to the non-energized state, the driving force of the driving source 2 is still transmitted to the armature 11 via the input shaft 20, the first gear 21, and the second gear 22, and the armature 11 rotates about the axis C.
At this time, the controller not shown and the external power supply not shown no longer supply current to the toroidal coil 14, the toroidal coil 14 no longer generates a magnetic circuit via the rotor 13 and the armature 11, and the armature 11 loses the attraction force attracted to the rotor 13 by the magnetic circuit. The armature 11 and the rotor 13 are restored to a state of being separated from each other by a certain interval in the axial direction (X-axis direction). Since the magnetic coupling state disappears, the rotational force of the armature 11 is no longer transmitted to the rotor 13. The rotor 13 no longer rotates with the armature 11. Even if the driving source 2 is still outputting the driving force at this time, only the armature 11 on the driving side a of the electromagnetic clutch 1 rotates, and the rotor 13 on the driven side B, the rotor fixing portion 12, and the output shaft 3 rotate only by inertia and stop rotating after a certain time has elapsed. That is, when the electromagnetic clutch 1 is in the non-energized state, the electromagnetic clutch 1 blocks the transmission of the power of the drive source 2 to the output shaft 3.
When the rotor 13 loses the driving force of the armature 11, the inertia becomes a driving force that drives the rotor 13, the rotor fixing portion 12, and the output shaft 3 to continue rotating about the axis C, and the rotor 13, the rotor fixing portion 12, and the output shaft 3 are not completely stopped until the inertia disappears due to friction.
After the rotor 13 loses the driving force of the armature 11, the rotor fixing portion 12, the rotor 13, and the output shaft 3 continue to rotate around the axis C for a certain time (this time is an idling time), and the existence of this idling time becomes an obstacle that cannot ensure the stopping accuracy of the electromagnetic clutch 1.
As shown in fig. 1, in the present embodiment, in order to reduce the idling time of the output shaft 3, the rotor fixing portion 12, and the rotor 13 when the electromagnetic clutch 1 is switched from the energized state to the non-energized state as much as possible, a damper portion 15 such as an O-ring is provided in a gap between the radially outer side of the ring coil 14 and the radially inner side of the rotor fixing portion 12, that is, the damper portion 15 is provided in the housing portion 124 of the rotor fixing portion 12. The damper portion 15 is formed in a ring shape (both axes C) coaxial with the rotation-self-fixing portion 12 and the toroidal coil 14.
When the toroidal coil 14 of the electromagnetic clutch 1 is switched from the energized state to the non-energized state, the damper 15 is provided between the radially outer side of the toroidal coil 14 and the radially inner side of the rotor fixing portion 12, friction is generated between the damper 15 and the rotor fixing portion 12, the rotational inertia of the rotor fixing portion 12 is suppressed by the frictional force, and the output shaft 3 rotates together with the rotor 13 and the rotor fixing portion 12, so that the damper 15 applies a braking force to the output shaft 3 and the rotor 13, and the damper 15 suppresses the idling of the rotor 13 and the output shaft 3, thereby reducing the idling time during which the rotor 13 and the output shaft 3 continue to rotate due to inertia when the electromagnetic clutch 1 is switched from the energized state to the non-energized state, and improving the stopping accuracy of the electromagnetic clutch 1.
Further, the damper portion 15 prevents interference with a magnetic path formed by the toroidal coil 14 in an energized state and passing through the armature 11 and the rotor 13. The damping portion 15 is preferably a non-magnetic material. The damper portion 15 is, for example, an O-ring made of rubber.
According to at least one embodiment described above, when the electromagnetic clutch is switched from the energized state to the non-energized state by providing the damper portion between the rotor fixing portion and the toroidal coil, the idling time of the rotor fixing portion, the rotor, and the output shaft due to inertia is significantly reduced, and the accuracy of stopping the electromagnetic clutch is improved.
While several embodiments of the present invention have been described, these embodiments have been presented by way of example only, and are not intended to limit the scope of the invention. These new embodiments can be implemented in other various manners, and various omissions, substitutions, combinations, and changes can be made without departing from the gist of the present invention. These embodiments and modifications are included in the scope and gist of the present invention, and are included in the present invention described in the claims and the equivalent scope thereof.
Claims (10)
1. An electromagnetic clutch, comprising:
an armature that receives power of a driving source to rotate, the armature being supported to be movable in an axial direction thereof;
a rotor fixing portion formed in a cylindrical shape having one end open in an axial direction and the other end closed;
a rotor rotatably supported by the rotor fixing portion, the rotor being coaxial with the armature;
a toroidal coil that forms a magnetic path through the rotor and the armature in an energized state, and causes the armature to be attracted to the rotor; and
a damper portion sandwiched between a radially outer side of the annular coil and a radially inner side of the rotor fixing portion.
2. The electromagnetic clutch of claim 1,
the rotor rotates together with the armature after attracting the armature.
3. The electromagnetic clutch of claim 1,
the rotor fixing part is sleeved on an output shaft for outputting power, and the rotor and the armature are coaxial with the output shaft.
4. The electromagnetic clutch of claim 1,
the damper portion suppresses idling of the rotor when the toroidal coil is switched from an energized state to a non-energized state.
5. The electromagnetic clutch of claim 1,
the drive source is composed of a first gear, a second gear, and an input shaft.
6. The electromagnetic clutch of claim 1,
the armature is formed of a magnetic material.
7. The electromagnetic clutch of claim 1,
the rotor is formed of a magnetic material.
8. The electromagnetic clutch of claim 1,
the damping portion is formed of a non-magnetic material.
9. The electromagnetic clutch of claim 1,
the damping part is an O-shaped ring.
10. The electromagnetic clutch of claim 9 wherein,
the O-ring is formed of rubber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022984420.1U CN214534147U (en) | 2020-12-11 | 2020-12-11 | Electromagnetic clutch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022984420.1U CN214534147U (en) | 2020-12-11 | 2020-12-11 | Electromagnetic clutch |
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| Publication Number | Publication Date |
|---|---|
| CN214534147U true CN214534147U (en) | 2021-10-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022984420.1U Active CN214534147U (en) | 2020-12-11 | 2020-12-11 | Electromagnetic clutch |
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| CN (1) | CN214534147U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114151463A (en) * | 2021-12-07 | 2022-03-08 | 南京立思辰智能设备有限公司 | Electromagnetic clutch assembly |
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2020
- 2020-12-11 CN CN202022984420.1U patent/CN214534147U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114151463A (en) * | 2021-12-07 | 2022-03-08 | 南京立思辰智能设备有限公司 | Electromagnetic clutch assembly |
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