WO2010001827A1 - 電磁連結装置 - Google Patents
電磁連結装置 Download PDFInfo
- Publication number
- WO2010001827A1 WO2010001827A1 PCT/JP2009/061714 JP2009061714W WO2010001827A1 WO 2010001827 A1 WO2010001827 A1 WO 2010001827A1 JP 2009061714 W JP2009061714 W JP 2009061714W WO 2010001827 A1 WO2010001827 A1 WO 2010001827A1
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- WO
- WIPO (PCT)
- Prior art keywords
- plate
- connecting portion
- armature
- facing
- members
- Prior art date
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D27/00—Magnetically- or electrically- actuated clutches; Control or electric circuits therefor
- F16D27/10—Magnetically- or electrically- actuated clutches; Control or electric circuits therefor with an electromagnet not rotating with a clutching member, i.e. without collecting rings
- F16D27/108—Magnetically- or electrically- actuated clutches; Control or electric circuits therefor with an electromagnet not rotating with a clutching member, i.e. without collecting rings with axially movable clutching members
- F16D27/112—Magnetically- or electrically- actuated clutches; Control or electric circuits therefor with an electromagnet not rotating with a clutching member, i.e. without collecting rings with axially movable clutching members with flat friction surfaces, e.g. discs
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D27/00—Magnetically- or electrically- actuated clutches; Control or electric circuits therefor
- F16D2027/007—Bias of an armature of an electromagnetic clutch by flexing of substantially flat springs, e.g. leaf springs
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2121/00—Type of actuator operation force
- F16D2121/18—Electric or magnetic
- F16D2121/20—Electric or magnetic using electromagnets
- F16D2121/22—Electric or magnetic using electromagnets for releasing a normally applied brake
Definitions
- the present invention relates to an electromagnetic coupling device that brakes or transmits a driving state of a rotational driving unit by a coupling unit by switching the rotational driving unit and the coupling unit from a non-coupled state to a coupled state by electromagnetic action.
- an electromagnetic brake that brakes the rotational motion on the rotational drive unit side by making the coupled state
- examples thereof include an electromagnetic clutch that transmits the rotational motion on the rotational drive unit side to the coupling unit side.
- the electromagnetic brake includes a shaft, a disk, a plate, an armature, a coil spring, and an electromagnet.
- the disk is a rotary drive unit that is provided with a facing material having an increased friction coefficient on the surface and can rotate together with the shaft.
- the plate and the armature are connecting portions provided on both sides of the disk.
- the coil spring biases the armature to press it against the disk.
- the electromagnet attracts the armature away from the disk against the bias of the coil spring by applying an electromagnetic force.
- an electromagnetic brake when no current is supplied to the electromagnet, the armature is released from the electromagnet, and the disk is sandwiched between the plates by the bias of the coil spring, which causes friction with the disk. Become. For this reason, the disc is braked by torque acting by friction with the armature and the plate.
- the armature is attracted by the electromagnet and separated from the disk, and the disk can be freely rotated between the plate and the armature.
- an armature that is a connecting portion is configured by stacking a ring-shaped flat iron plate and a silicon steel plate and integrated by welding each other on the inner and outer peripheries (see, for example, Patent Document 1).
- the electromagnetic coupling device having such a coupling portion, even when the coupling portion comes into contact with the rotation drive unit or the electromagnet during the attraction and release operations by the electromagnet, the impact force generated at that time depends on the laminated structure. Absorbed by cushioning action. Further, the natural frequency of the connecting portion is reduced by the laminated structure. For this reason, it is said that it is possible to reduce the impact noise generated when the connecting portion comes into pressure contact with the rotary drive portion.
- the armature and the plate that are the connecting parts it is composed of a plurality of metal plates and a cork-like cushioning material or rubber-like cushioning material disposed between them, and these are fastened with screws to integrate them
- Patent Document 2 The gap between the yoke and the plate is kept constant by utilizing holes provided in the outer peripheral portion of the yoke and the outer peripheral portion of the plate and assembly bolts inserted through these holes.
- the electromagnetic coupling device provided with such a coupling part, the impact force acting on the coupling part is absorbed by the buffer material, thereby reducing the impact noise generated when the coupling part is pressed against the rotary drive part. It is supposed to be possible.
- JP-A-8-247181 Japanese Patent Laid-Open No. 10-306834
- peripheral portions of the connecting portion are firmly joined to make the members of each layer more integrated, or the strength of the material forming each layer is improved, or the member thickness is increased. .
- the rigidity becomes high as a whole, and the impact noise cannot be effectively reduced.
- the present invention has been made in view of the above-mentioned circumstances, and while suppressing impact noise and preventing damage to the connecting portion, the rotational drive portion and the connecting portion are brought into a connected state and a non-connected state.
- An electromagnetic coupling device that can be switched is provided.
- the present invention proposes the following means.
- the present invention includes a rotation drive unit that is movable in a predetermined rotation drive direction, and a connection unit that is provided relative to the rotation drive unit so as to be capable of moving back and forth in a forward / backward direction substantially orthogonal to the rotation drive direction, And switching means for switching between a connected state in which the connecting portion and the rotation driving portion are pressed against each other and a non-connected state separated from each other by applying an electromagnetic force, and the connecting portion is at least a peripheral edge in the advancing and retracting direction.
- the non-fastened state means that a plurality of plate-like members stacked in the advance / retreat direction are provided so as to be able to advance / retreat independently from each other in the advance / retreat direction to such an extent that a gap is formed between each plate-like member. including.
- the connecting unit and the rotary driving unit when the rotation driving unit and the connecting unit are switched from the non-connected state to the connected state by the switching unit, the connecting unit and the rotary driving unit relatively move forward and backward and come into pressure contact with each other.
- the plurality of plate-like members of the connecting portion have at least the peripheral portion in the non-fastened state, a gap is formed between the plate-like members without causing any binding force in a direction orthogonal to the advance / retreat direction.
- they can advance and retreat independently in the advancing and retreating direction, and the state in which the rigidity is lowered as a whole can be kept. For this reason, the ratio of the high frequency component of the impact noise generated when abutting against the rotary drive unit or other members can be particularly suppressed, and the noise level can be reduced.
- the rotation drive unit moves in a predetermined rotation drive direction when the connection unit is pressed against the rotation drive unit and an external force acts on the connection unit in the rotation drive direction, Since the contacting member and the non-contacting member are integrally pressed against the rotational drive unit, it is possible to prevent a large reaction force from the assembly bolt from being concentrated on the insertion hole of the contacting member. . In this way, the plurality of plate-like members of the connecting portion can withstand external forces integrally, and can be prevented from being damaged by stress concentration in the holes for inserting the mounting bolts.
- the said sliding control part is an engaging part which engages said other plate-shaped member with respect to said one plate-shaped member. According to this structure, it can control that the other plate-shaped member engages with one plate-shaped member by an engaging part, and slides in a rotational drive direction. For this reason, it can be set as the state restrained by adjacent plate-shaped members, and a some plate-shaped member can resist damage against an external force integrally.
- the said sliding control part is good also as what is a friction surface. According to this configuration, the frictional force generated between the one and the other plate-like members is increased by the friction surface, so that sliding in the rotational drive direction can be restricted. For this reason, it will be in the state by which the adjacent plate-shaped members were restrained, and a some plate-shaped member can resist damage against an external force integrally.
- the present invention includes a substantially plate-like plate, and an armature that is provided apart from the plate in the advance / retreat direction and is capable of advancing / retreating in the advance / retreat direction, wherein the rotational drive unit includes the plate and the armature. It is more preferable that the plate and the armature are provided with a plurality of the plate-like members as the connecting portions.
- the switching means can be switched between a connected state in which the plate and the armature are held in contact with the rotation drive unit and a non-connection state having a gap between the rotation drive unit.
- the plate or armature is provided with a plurality of plate-like members as connecting portions, and the sliding restriction portion of the plate-like member is provided, so that the plate or armature can be externally integrated in the rotational drive direction in the connected state. It is possible to reduce impact noise when contacting the rotary drive unit or other members while preventing damage against the above.
- both the said plate and the said armature are equipped with the said some plate-shaped member as the said connection part.
- both the plate and the armature are provided with a plate-like member as a connecting portion, so that impact noise can be more effectively reduced while preventing damage against an external force integrally in the rotational drive direction. Can be made.
- the switching means includes a biasing member that biases the connecting portion toward one side in the advance / retreat direction, and an electromagnetic force that causes each plate member of the connecting portion to move to the other side in the forward / backward direction.
- the electromagnetic force acting on each plate-like member of the connecting portion by the electromagnet is set to be smaller than the urging force by the urging member, It is preferable that the resultant force of the electromagnetic force acting on each plate member is set to be larger than the urging force by the urging member.
- the rotation driving portion and the connecting portion can be maintained in either the connected state or the unconnected state. it can.
- an electromagnetic force is applied to the connecting unit by the electromagnet.
- the electromagnetic force which acts on each plate-like member of the connecting portion by the electromagnet is set to be smaller than the urging force by the urging member.
- the combined force of the electromagnetic force acting on all the plate-like members is set larger than the biasing force by the biasing member, so that the plurality of plate-like members constituting the connecting portion are biased as a unit. It can be attracted to the electromagnet against the urging force of the member, and can be switched to the other state of the connected state or the unconnected state. For this reason, it can prevent that a plate-shaped member isolate
- the combined force of the electromagnetic force acting on the other plate-like members except for any one sheet by the electromagnet is set smaller than the urging force by the urging member.
- the combined force of the electromagnetic force that acts on the other plate-like members other than any one of the biasing force by the biasing member is set to be small, so that the action of the electromagnetic force
- the connecting portion can be sucked as one piece without more reliably separating.
- the switching means includes a biasing member that biases the connecting portion toward one side in the advance / retreat direction, and an electromagnetic force that causes each plate member of the connecting portion to move to the other side in the forward / backward direction. It is preferable to have an electromagnet that can be attracted and has a recess formed in an end surface facing the connecting portion.
- the connecting portion by attracting the plate-like member of the connecting portion by the electromagnet, the connecting portion comes into contact with the other portion of the electromagnet other than the concave portion and is supported in a beam shape. For this reason, the connecting portion is bent when it comes into contact with the electromagnet, the collision energy is absorbed by the bending deformation, and the impact noise can be reduced more effectively.
- the rotation driving unit includes a main body member provided to face the connecting portion, and a facing member provided to protrude on the side of the main body member facing the connecting portion so as to come into contact with the connecting portion. It is preferable that the thickness of the facing member is set to be thicker than the thickness of the main body member.
- connection unit when the rotation drive unit and the connection unit are in the connected state, the connection unit comes into contact with the facing member of the rotation drive unit. For this reason, the facing member is elastically deformed according to the material of the facing member, so that the impact force when contacting the connecting portion is absorbed, impact noise is reduced, and friction is effectively generated.
- the connection state can be maintained.
- the thickness of the facing member by setting the thickness of the facing member to be larger than the thickness of the main body member, it is possible to more effectively reduce the impact noise by elastic deformation of the facing member.
- the rotation drive unit is provided with a main body member provided to face the connection portion, and a first member provided to protrude on the side of the main body member facing the connection portion so as to be able to contact the connection portion.
- the second facing member is preferably provided so as to protrude so as to be able to come into contact with the other before the first facing member comes into contact with the connecting portion.
- the connection unit comes into contact with the first facing member of the rotation drive unit.
- the first facing member is elastically deformed, so that the impact force when contacting the connecting portion is absorbed and the impact noise is reduced.
- friction can be generated and the connected state can be maintained.
- the connecting portion and the first facing member of the rotation driving portion abut, the second facing member provided on at least one of the facing portions of the connecting portion and the rotation driving portion is first. It will contact the other side.
- the material of the second facing member is elastically deformed more flexibly because the elastic modulus is smaller than that of the material of the first facing member. Thereby, a connection part can be made to contact
- the coupling portion includes a plurality of laminated plate-like members having a sliding restriction portion, thereby effectively suppressing impact noise and preventing damage to the coupling portion.
- the rotation drive unit and the coupling unit can be switched between a coupled state and a non-coupled state.
- FIG. 4 is a cross-sectional view taken along a cutting line AA in FIG. 3.
- the electromagnetic brake of the modification of 1st Embodiment of this invention it is sectional drawing of a plate-shaped member. It is sectional drawing in the connection state of the electromagnetic brake of 2nd Embodiment of this invention. It is sectional drawing in the non-connecting state of the electromagnetic brake of 3rd Embodiment of this invention.
- FIG. 1 and FIG.2 has shown the non-excitation operation type electromagnetic brake as an example of an electromagnetic coupling device.
- the electromagnetic brake 1 of this embodiment includes a disk 10, a plate 20, an armature 30, and switching means 40.
- the disk 10 is a rotational drive unit that is coaxially and rotatably attached to the shaft 2 that is rotationally driven.
- the plate 20 is provided on one side of the shaft 2 in the rotation axis L direction with respect to the disk 10.
- the armature 30 is a connecting portion provided on the other side.
- the switching means 40 switches between a connected state in which the armature 30 is pressed against the disk 10 and a separated unconnected state by applying an electromagnetic force.
- the disk 10 includes a substantially cylindrical fixing member 11 that is externally fitted and fixed to the shaft 2, a substantially annular main body member 12 that is externally mounted on the fixing member 11, and a facing member 13 that is provided on both surfaces of the main body member 12.
- the fixing member 11 is fixed to the shaft 2 by a key (not shown).
- a plurality of teeth 11 a are formed on the outer peripheral surface of the fixed member 11 along the direction of the rotation axis L.
- a groove 12a formed along the rotation axis L direction corresponding to the teeth 11a of the fixing member 11 is provided on the inner peripheral surface of the main body member 12, and is slid on the teeth 11a of the fixing member 11 in the rotation axis L direction. It is meshed movably.
- the fixing member 11, the main body member 12 and the facing member 13 constituting the disk 10 are integrally rotated around the rotation axis L of the shaft 2. It is possible to rotate as a direction. Further, in the disk 10, the main body member 12 and the facing member 13 can be advanced and retracted in the direction of the rotation axis L with respect to the shaft 2 and the fixing member 11.
- the facing member 13 has a substantially donut shape and is provided on both surfaces of the main body member 12 so as to be press-contacted to the plate 20 or the armature 30 so as to protrude toward the other surface.
- a material such as rubber or various resins is selected.
- the facing member 13 is generally a member having a lower rigidity than the plate 20 or the armature 30.
- the facing member 13 has a coefficient of friction that allows friction between the plate 20 and the armature 30 to be constrained in a direction orthogonal to the rotation axis L and around the rotation axis L. It is preferable that The thickness of the facing member 13 can be variously changed depending on the material and use conditions, but it is more preferable that the thickness of the facing member 13 is set larger than the thickness of the main body member 12 at the position where the facing member 13 is provided.
- the plate 20 is a substantially disk-shaped member in which the shaft 2 passes through a through hole 20a formed in the center.
- the plate 20 is made of a magnetic material or metal.
- the armature 30 is composed of a plurality of substantially disk-like plate-like members 31 in which the shaft 2 passes through a through hole 31a formed in the center.
- the plurality of plate-like members 31 are stacked in a non-fastened state.
- the armature 30 is composed of two layers of plate-like members 31.
- Each plate member 31 is made of a magnetic material such as iron.
- Engaging portions 32 that are sliding restricting portions are provided on opposing surfaces 31b of the plate-like members 31 that face each other. As shown in FIGS.
- the engaging portion 32 is configured by unevenness provided radially.
- the engaging portion 32 includes a plurality of convex portions 32 a and a plurality of concave portions 32 b that are linearly formed along the radial direction around the rotation axis L.
- the convex portions 32a and the concave portions 32b are alternately arranged in the direction around the rotation axis L so that the cross section has a zigzag shape.
- the opposing surfaces 31b of the adjacent plate-like members 31 are engaged with each other by the convex portions 32a and the concave portions 32b facing each other.
- an effective restraining force is produced by the rotational driving direction around the rotating shaft L, and the adjacent plate-like members 31 are restricted from sliding on each other.
- the switching means 40 has an electromagnet 41 and a coil spring 42.
- the electromagnet 41 is provided on the opposite side of the disk 10 with respect to the armature 30.
- the coil spring 42 is a biasing member that biases the armature 30 in the direction of the rotation axis L from the electromagnet 41 side toward the disk 10.
- the electromagnet 41 includes a substantially cylindrical yoke 43 and a coil 44.
- a through hole 43a is provided in the center of the yoke 43, and the shaft 2 is passed through the through hole 43a.
- a coil 44 is accommodated in a substantially annular groove formed on the side of the yoke 43 facing the armature 30.
- a fixing hole 43 b is provided on the outer peripheral side of the yoke 43.
- a substantially shaft-shaped guide member 45 is fixed to the fixing hole 43b substantially parallel to the rotation axis L.
- the leading end of the guide member 45 protrudes from the yoke 43 toward the plate 20 side.
- the distal end portion of the guide member 45 is inserted into guide holes 31 c and 20 b formed in each plate-like member 31 and the plate 20 of the armature 30.
- the front end side of the guide member 45 has the step part 45a, and the diameter is reducing at the step part 45a.
- a male screw is formed on the distal end side of the guide member 45, and a nut 45b is screwed to the male screw.
- a spring member 46 is externally provided between the step 45a and the nut 45b.
- the plate 20 is elastically sandwiched between the spring member 46 and the nut 45b by the bias of the spring member 46. For this reason, the plate 20 is held at a substantially constant interval with the yoke 43, while each plate-like member 31 of the armature 30 can advance and retreat in the direction of the rotation axis L along the guide member 45.
- one guide member 45 is illustrated as being provided, but a plurality of guide members 45 are provided in the circumferential direction in plan view.
- the one end side of the coil spring 42 is accommodated in the accommodation hole 43e formed in the end surface 43c of the yoke 43 facing the armature 30, and the other end side is in contact with the armature 30.
- the coil spring 42 urges the armature 30 toward the disk 10 side.
- one coil spring 42 is illustrated as being provided, but a plurality of coil springs 42 are provided in the circumferential direction in plan view.
- the armature 30 is attracted against the bias of the coil spring 42 by the electromagnetic force and is rotated. Move in the direction.
- the armature 30 can be separated from the facing member 13 of the disk 10 and brought into contact with the yoke 43.
- the electromagnetic force does not act, and the armature 30 is pressed against the facing member 13 of the disk 10 by the urging force of the coil spring 42. It is possible to be in the state.
- the thickness of each plate-like member 31 constituting the armature 30 is set so that the electromagnetic force acting on one plate-like member 31 by the electromagnet 41 is smaller than the total urging force by the coil spring 42.
- the combined force of the electromagnetic forces acting on all the plate-like members 31 is set to be larger than the sum of the urging forces of the coil springs 42.
- the plurality of plate-like members 31 constituting the armature 30 are in the non-fastened state, they are constrained to each other in the radial direction orthogonal to the rotation axis L direction even when the electromagnetic force acts and is attracted as a unit. It is possible to suppress the generation of force and to keep the state where the rigidity is lowered as a whole. For this reason, the ratio of the high frequency component of the impact noise generated when the electromagnet 41 contacts the end surface 43c of the yoke 43 can be particularly suppressed, and the noise level can be effectively reduced. Further, in the disk 10, the thickness of the facing member 13 that contacts the plate 20 and the armature 30 is set to be thicker than the thickness of the main body member 12, so that impact noise can be reduced more effectively.
- the engaging portion 32 that is a concavo-convex formed radially in the radial direction is provided on the opposing surface 31a of the plate-like member 31, a binding force is effectively generated in the rotational drive direction substantially orthogonal to the radial direction. It is possible to regulate sliding on each other. For this reason, when the armature 30 is pressed against the disk 10, even if an external force is applied in the rotational drive direction as described above, the plurality of plate-like members 31 can integrally resist. That is, the plate-like member 31 that is in direct contact with the disk 10 slides against the plate-like member 31 that is not in contact with the disk 10 and comes into contact with the guide member 45, thereby causing the plate-like member to be in direct contact with the disk 10. It is possible to prevent stress concentration from occurring near the through-hole 31c of the 31 and damage.
- the switching means 40 excites the coil 44 of the electromagnet 41 by passing a current.
- a magnetic field is generated, and an electromagnetic force acts on each plate-like member 31 of the armature 30 formed of a magnetic material, and the plate-like member 31 is attracted to the yoke 43 side against the coil spring 42.
- the thickness of each plate-like member 31 constituting the armature 30 is set such that the electromagnetic force acting on each plate-like member 31 is smaller than the total urging force of the coil spring 42. For this reason, each plate-like member 31 does not move separately from the other plate-like members 31 against the urging by the coil spring 42.
- the plate-like member 31 Since the combined force of the electromagnetic forces acting on all the plate-like members 31 is set to be larger than the sum of the urging forces of the coil springs 42, the plate-like member 31 as a whole resists the urging forces of the coil springs 42. Is attracted to the electromagnet 41. Then, the plate-like member 31 of the armature 30 integrated with the armature 30 is separated from the disk 10, guided by the guide member 45, abuts against the end surface 43 c of the yoke 43, and is in a non-connected state. For this reason, the disk 10 is in a state having a gap between the plate 20 and the armature 30, and can be rotated in accordance with the rotation of the shaft 2.
- the plurality of plate-like members 31 constituting the armature 30 are in the non-fastened state, so that the state in which the rigidity is lowered as a whole can be maintained even when the electromagnetic force is applied and sucked as a whole. it can. For this reason, the noise level of the impact noise generated when the electromagnet 41 abuts against the end face 43c of the yoke 43 can be effectively reduced.
- the plate-like members 31 of the armature 30 are not separated and moved independently, and are reliably attracted to the electromagnet 41 in the unconnected state. For this reason, it is possible to prevent the separated plate-like member 31 from coming into sliding contact with the disk 10 when the disk 10 rotates in the disconnected state. As a result, it is possible to reliably prevent the occurrence of torcross and noise due to sliding contact noise.
- the armature 30 includes the engagement member 32 that is a sliding restricting portion, and includes a plurality of stacked plate-like members 31, thereby effectively reducing impact noise.
- the disk 10 and the armature 30 can be switched between the connected state and the unconnected state while preventing the armature 30 from being damaged.
- the plurality of plate-like members 31 are in a non-fastened state.
- the present invention is not limited to this, and the plate-like members 31 are not necessarily fastened as a whole and need to be able to advance and retreat independently from each other in the direction of the rotation axis L to such an extent that a gap is formed between them. There is no.
- at least the peripheral edge portion is in the non-fastened state, thereby suppressing the occurrence of binding forces in the direction orthogonal to the advancing and retreating rotation axis L direction, and maintaining a state in which the rigidity is lowered as a whole. This can reduce the noise level.
- FIG. 5 shows a detailed sectional view of an armature as a modification of the present embodiment.
- convex portions 52a and concave portions 52b having a rectangular cross section are alternately formed as engaging portions 52.
- the convex part 52a and the recessed part 52b of the engaging part 52 are cross-sectional rectangular shapes, it can control that the plate-shaped members 51 slide by engaging each other.
- the engaging portion 32 made of unevenness provided radially is used as the sliding restricting portion.
- the present invention is not limited to this. That is, the facing surface 31b is radially roughened so as to be substantially orthogonal to the rotational driving direction, or a fiber material or the like that improves the friction coefficient is radially embedded so as to be exposed from the facing surface 31b. It is good also as a friction surface which increased the friction coefficient of the rotational drive direction compared with. If such a friction surface is used, the frictional force generated between the plate-like members can be integrated as a restraining force, and an effect of preventing damage can be expected.
- the sliding restricting portion is formed on the entire facing surface 31b.
- the present invention is not limited to this, and is provided at least in part.
- the sliding restriction portions are formed on the opposing surfaces 31b.
- the present invention is not limited to this. On the other hand, it is possible to effectively engage or generate a frictional force, and similarly to expect the effect of preventing damage.
- the disk 10 that is the rotation drive unit rotates, the unevenness provided radially so as to be substantially orthogonal to the rotation drive direction is adopted as the sliding restriction unit 32.
- a structure in which irregularities are alternately arranged in a direction orthogonal to the linear direction may be used as the sliding restriction portion 32.
- the plate-like member 31 constituting the armature 30 has two layers.
- the present invention is not limited to this, and three or more layers may be used.
- the thickness of the plate-like member 31 is not only set so that the electromagnetic force acting on each plate-like member 31 is smaller than the total urging force of the coil spring 42, Furthermore, it is preferable that the combined force of the electromagnetic forces acting on the remaining plate members 31 other than any one of the plate members 31 is set to be smaller than the total urging force of the coil spring 42.
- the relationship between the electromagnetic force generated by the electromagnet 41 and the plate-like member 31 has been described as being set according to the thickness of the plate-like member 31, but the present invention is not limited to this and is supplied to the coil 44 of the electromagnet 41. It may be set according to the magnitude of the current to be generated.
- FIG. 5 shows a second embodiment of the present invention.
- members that are the same as those used in the above-described embodiments are given the corresponding reference numerals in the 100s, and the description thereof is omitted.
- the electromagnetic brake 101 of this embodiment has a laminated structure including a plurality of plate-like members 162 so that the plate 161 also functions as a connecting portion.
- the plate-like members 162 of the plate 161 are laminated in a non-fastened state.
- the plate 161 is clamped in the direction of the rotation axis L using the spring member 146 and the nut 145b as clamping means 165.
- the plate-like member 162 of the plate 161 is provided with engaging portions 166 made of irregularities formed radially around the rotation axis L as sliding restriction portions on the opposing surfaces 162a that are in contact with each other. .
- the plate 161 also presses against the disk 110 when it is switched from the unconnected state to the connected state, and an impact sound is generated.
- the plate 161 also has a multi-layered structure so that the impact can be reduced. Noise can be reduced.
- each plate-like member 162 of the plate 161 is also provided with the engaging portion 166, the effect of preventing damage can be expected similarly.
- the plate 161 is elastically held by the holding means 165, so that the plate-like member 162 can advance and retreat independently in the direction of the rotation axis L against the urging force by the spring member 146 of the holding means 165.
- a more integrated state can be obtained. For this reason, in the unconnected state, it is possible to more reliably prevent one of the plate-like members 162 from separating and slidingly contacting the disk 110 and generating sliding contact noise as noise.
- the plate-shaped members 162 may have at least the peripheral edge 162b in an unfastened state.
- FIG. 7 shows a third embodiment of the present invention.
- the members common to the members used in the above-described embodiments are denoted by the corresponding reference numerals in the 200s and the description thereof is omitted.
- an end surface 243c of the yoke 243 that faces the armature 230 is formed with an annular recess 243e on the outer peripheral side.
- the inner peripheral side of the yoke 243 is set to be slightly closer to the armature 230 than the outer peripheral side.
- the disk 210 has the first facing member 213 (facing member in the first embodiment).
- second facing members 271 and 272 protrude from the surface of the armature 230 facing the disk 210 and the surface of the plate 220 facing the disk 210, respectively.
- the second facing members 271 and 272 are formed in a substantially annular shape, and are provided so as to protrude at a position that does not overlap the first facing member 213 in the rotation axis L direction.
- the second facing members 271 and 272 are discs before the plate 220 and the armature 230 abut against the first facing member 213.
- the main body member 212 protrudes so as to be able to come into contact therewith.
- the material forming the second facing members 271 and 272 has a smaller elastic modulus than the material forming the first facing member 213.
- the armature 230 when the electromagnet 241 is brought into an excited state and switched from the connected state to the non-connected state, the armature 230 is attracted by the electromagnet 241 and resists the biasing force of the coil spring 242 against the yoke 243. It will contact
- a concave portion 243e is formed on the end surface 243c of the yoke 243, and the armature 230 abuts on the end surface 243c in an inner peripheral side excluding the concave portion 243e, and is supported by the yoke 243 of the electromagnet 241 in a beam shape.
- the armature 230 bends and deforms in a range facing the recess 243e with the abutted portion as a fulcrum.
- impact energy is absorbed and impact noise can be reduced more effectively.
- the concave portion 243e is provided on the outer peripheral side, and the armature 230 is cantilevered from the inner peripheral side toward the outer peripheral side, so that the amount of bending can be further increased.
- the depth of the recess 243e may be very small. This is because, as a result of the armature 230 being bent and deformed, at least a part of the impact energy can be absorbed even if it comes into contact with the recess 243e, and an effect of reducing the impact noise can be expected.
- the armature 230 is moved to the rotation axis L direction disk 210 side by the urging force of the coil spring 242, and the disk 210 is moved to the plate 220 and the armature 230. Sandwiched between. At this time, the second facing members 271 and 272 come into contact with the main body member 212 of the disc 210 before the plates 220 and the armature 230 come into contact with the first facing members 213 of the disc 210.
- the second facing members 271 and 272 Since the material of the second facing members 271 and 272 has a smaller elastic modulus than the material of the first facing member 213, the second facing members 271 and 272 are elastically deformed more flexibly. Accordingly, the plate 220 and the armature 230 can be brought into contact with the first facing member 213 of the disk 210 with a smaller impact. For this reason, the impact noise when the plate 220 and the armature 230 are pressed against the disk 210 can be more effectively reduced.
- the second facing members 271 and 272 are formed in an annular shape.
- the present invention is not limited to this, and the first facing member 213 does not overlap with the rotation axis L direction.
- the position can be provided in various shapes.
- the second facing members 271 and 272 are provided on the plate 220 and the armature 230, but the present invention is not limited to this.
- the second facing members 281 and 282 may be provided on the main body member 212 of the disk 210 and abut against the opposing plate 220 and armature 230.
- the 2nd facing member shall be provided corresponding to both the plate 220 and the armature 230, it is not restricted to this, It is good also as either one.
- the electromagnetic coupling device is exemplified as the non-excitation operation type electromagnetic brake, but is not limited thereto.
- the present invention can also be applied to an excitation actuated electromagnetic brake that brings a connecting portion and a rotational drive portion into a connected state when an electromagnet is excited.
- FIG. 9 and FIG. 10 show a fourth embodiment of the present invention, and show an excitation operation type electromagnetic clutch as an example of an electromagnetic coupling device.
- the electromagnetic clutch 301 of this embodiment includes a disk 310, a hub 320, an armature 330, and a switching means 340.
- the disk 330 is a rotation drive unit.
- the hub 320 is disposed opposite to the disk 310.
- the armature 330 is a connecting portion interposed between the disk 310 and the hub 320.
- the switching means 340 switches between a connected state where the armature 330 is pressed against the disk 310 and a disconnected state where the armature 330 is separated.
- the disk 310 is a cylindrical member attached to the first shaft 301 that is connected to the main drive side and rotationally driven.
- the disk 310 includes a main body member 311 having a flange portion 311a and a facing member 312 attached to a surface of the flange portion 311a facing the hub 320.
- a cylindrical portion 311b protruding from the flange portion 311a is externally fitted to the first shaft 301 and fixed. Thereby, the disk 310 can rotate on the same axis as the rotation axis L of the first shaft 301. Since the material and shape of the facing member 312 are the same as those of the facing member of the first embodiment, the description thereof is omitted.
- the hub 320 is a substantially cylindrical member attached to the second shaft 302 that is connected to the driven side and is rotatable coaxially with the rotation axis L.
- the hub 320 has a flange portion 320 a facing the armature 330.
- the armature 330 is composed of a plurality of substantially disk-shaped plate members 331 and 332 made of a magnetic material.
- the plurality of plate-like members 331 and 332 are stacked in a non-fastened state.
- the engaging portion 333 made of unevenness provided radially as the center of the rotation axis L as the sliding restricting portion as in the first embodiment. Is formed.
- the sliding restricting portion is not limited to the engaging portion, and may be a friction surface.
- the armature 330 is composed of two layers of plate-like members 331 and 332, but may be three or more layers.
- the switching means 340 includes an electromagnet 341 provided on the opposite side of the flange portion 311 a of the disk 310 with respect to the armature 330, and a leaf spring 342 that is a biasing member provided between the armature 330 and the hub 320.
- the electromagnet 341 includes a substantially cylindrical yoke 343 and a coil 344.
- the electromagnet 341 is covered by a bearing 345 so as to be rotatable around the rotation axis L with respect to the cylindrical portion 311 b of the disk 310.
- a plurality of leaf springs 342 are provided radially about the rotation axis L.
- Each leaf spring 342 has one end fixed to the hub 320 by a rivet 342a and the other end fixed to the armature 330 by a rivet 342b.
- the plate-like member 331 on the hub 320 side is formed with a through hole 331a at a position corresponding to the plate spring 342.
- the leaf spring 342 is fixed to the leaf spring 332 closest to the disk 310.
- the leaf spring 342 biases the armature 330 so as to attract the hub 320.
- the armature 330 is in a state where no current is applied to the coil 344 of the electromagnet 341 and no electromagnetic force is applied, and the armature 330 is in contact with the flange 320a of the hub 320 by the urging force of the leaf spring 342. Yes.
- the switching unit 340 excites the coil 344 of the electromagnet 341 by passing a current.
- a magnetic field is generated, and an electromagnetic force acts on the plate-like members 331 and 332 of the armature 330 formed of a magnetic material.
- the plate-like members 331 and 332 are attracted to the yoke 343 side against the urging force of the plate spring 342, and are brought into pressure contact with the facing member 312 of the disk 310 to be connected. . Therefore, the rotation of the first shaft 301 is transmitted from the disk 310 to the second shaft 302 via the armature 330 and the hub 320, and the second shaft 302 rotates about the rotation axis L.
- the armature 330 is a laminated structure of a plurality of plate-like members 331 and 332 in a non-fastened state, it is possible to suppress the occurrence of binding forces in the radial direction perpendicular to the rotation axis L direction, and as a whole The rigidity can be kept. For this reason, the ratio of the high frequency component of the impact noise generated when the armature 330 is pressed against the disk 310 can be suppressed, and the noise level can be effectively reduced.
- the plate-like members 331 and 332 of the armature 330 are provided with the sliding restricting portions 133, so that a frictional force can be effectively generated in the rotational driving direction. For this reason, even if an external force acts in the rotational drive direction, the plurality of plate-like members 331 and 332 can integrally resist, and stress is concentrated and damaged at a position where the plate spring 342 is restrained. Can be prevented.
- an example of an electromagnetic coupling type electromagnetic clutch is given as an example of an electromagnetic coupling device, but the present invention can also be applied to a non-excitation type electromagnetic clutch.
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Abstract
Description
本発明は、所定の回転駆動方向に移動可能な回転駆動部と、該回転駆動部に対して、前記回転駆動方向と略直交する進退方向に相対的に進退可能に設けられた連結部と、電磁力を作用させることによって前記連結部と前記回転駆動部とを互いに圧接した連結状態と互いに離間した非連結状態とに切り替える切替手段とを具備し、前記連結部は、前記進退方向に少なくとも周縁部が非締結状態で積層された複数の板状部材を備え、隣り合う該板状部材同士の少なくとも一方の板状部材には、他方の板状部材と対向する面に、該他方の板状部材が回転駆動方向に摺動するのを規制する摺動規制部が設けられていることを特徴としている。
ここで、非締結状態とは、前記進退方向に複数積層した板状部材が、各板状部材間に隙間が形成される程度に前記進退方向に互いに独立して進退可能に設けられていることを含む。
この構成によれば、係合部によって一方の板状部材に対して他方の板状部材が係合することで、回転駆動方向に摺動してしまうのを規制することができる。このため、隣り合う板状部材同士で拘束した状態とすることができ、複数の板状部材は、一体的に外力に抗して損傷を防止することができる。
この構成によれば、摩擦面によって一方と他方との板状部材の間に生じる摩擦力が増大することで、回転駆動方向に摺動してしまうのを規制することができる。このため、隣り合う板状部材同士が拘束された状態となり、複数の板状部材は一体的に外力に抗して損傷を防止することができる。
この構成によれば、プレート及びアーマチュアの両方が連結部として板状部材を備えていることで、回転駆動方向に一体的に外力に抗して損傷を防止しつつより効果的に衝撃騒音を低減させることができる。
図1から図3は、この発明に係る第1の実施形態を示している。ここで、図1及び図2は、電磁連結装置の一例として、無励磁作動型の電磁ブレーキを示している。図1に示すように、この実施形態の電磁ブレーキ1は、ディスク10と、プレート20と、アーマチュア30と、切替手段40とを備える。ディスク10は、回転駆動するシャフト2に同軸上で回転可能に取り付けられた回転駆動部である。プレート20は、ディスク10に対してシャフト2の回転軸L方向一方側に設けられている。アーマチュア30は、他方側に設けられた連結部である。切替手段40は、電磁力を作用させることによってアーマチュア30がディスク10に圧接した連結状態と離間した非連結状態とに切り替える。
アーマチュア30は、中央に形成された貫通孔31aをシャフト2が貫通した略円板状の複数の板状部材31で構成される。複数の板状部材31は互いに非締結状態で積層される。本実施形態では、アーマチュア30は、二層の板状部材31で構成されている。また、各板状部材31は、鉄などの磁性体で形成されている。各板状部材31の互いに対向する対向面31bには、摺動規制部である係合部32がそれぞれ設けられている。図3及び図4に示すように、係合部32は、放射状に設けられた凹凸で構成される。すなわち、係合部32は、回転軸Lを中心として径方向に沿って線状に形成された複数の凸部32aと複数の凹部32bとで構成される。凸部32aと凹部32bは断面がジグザグ状となるように、回転軸Lの回り方向に交互に配設されている。このため、隣り合う板状部材31の対向面31b同士は、互いに対向する凸部32aと凹部32bとで係合する。これにより、回転軸Lの径方向と比較して、回転軸L回りの回転駆動方向により効果的な拘束力が生まれ、隣り合う板状部材31が互いに摺動してしまうことが規制される。
次に、本発明の第2の実施形態について説明する。図5は、本発明の第2の実施形態を示したものである。この実施形態において、前述した実施形態で用いた部材と共通の部材には100番台の対応する符号を付して、その説明を省略する。
次に、本発明の第3の実施形態について説明する。図7は、本発明の第3の実施形態を示したものである。この実施形態において、前述した実施形態で用いた部材と共通の部材には200番台の対応する符号を付して、その説明を省略する。
次に、本発明の第4の実施形態について説明する。図9及び図10は、本発明の第4の実施形態を示したものであり、電磁連結装置の一例として、励磁作動型の電磁クラッチを示している。
10 ディスク(回転駆動部)
13 フェーシング部材(第1のフェーシング部材)
20、61 プレート(連結部)
30、50 アーマチュア(連結部)
31、51、62 板状部材
32、52、66 係合部(摺動規制部)
40 切替手段
41 電磁石
43e 凹部
71、72、81、82 第2のフェーシング部材
100 電磁クラッチ(電磁連結装置)
110 ディスク(回転駆動部)
130 アーマチュア
131、132 板状部材
133 係合部(摺動規制部)
140 切替手段
L 回転軸
Claims (10)
- 所定の回転駆動方向に移動可能な回転駆動部と、
該回転駆動部に対して、前記回転駆動方向と略直交する進退方向に相対的に進退可能に設けられた連結部と、
電磁力を作用させることによって前記連結部と前記回転駆動部とを互いに圧接した連結状態と互いに離間した非連結状態とに切り替える切替手段とを具備し、
前記連結部は、前記進退方向に少なくとも周縁部が非締結状態で積層された複数の板状部材を備え、隣り合う該板状部材同士の少なくとも一方の板状部材には、他方の板状部材と対向する面に、該他方の板状部材が回転駆動方向に摺動するのを規制する摺動規制部が設けられている
電磁連結装置。 - 請求項1に記載の電磁連結装置であって、
前記摺動規制部は、前記一方の板状部材に対して前記他方の板状部材を係合する係合部である
電磁連結装置。 - 請求項1に記載の電磁連結装置であって、
前記摺動規制部は、摩擦面である
電磁連結装置。 - 請求項1に記載の電磁連結装置であって、
略板状のプレートと、
該プレートと前記進退方向に離間して設けられ、該進退方向に進退可能なアーマチュアと備え、
前記回転駆動部は、前記プレートと前記アーマチュアとの間で前記進退方向に進退可能に介装され、
前記プレートと前記アーマチュアの少なくとも一方が、前記連結部として複数の前記板状部材を備えている
電磁連結装置。 - 請求項4に記載の電磁連結装置であって、
前記プレート及び前記アーマチュアの両方が、前記連結部として複数の前記板状部材を備えている
電磁連結装置。 - 請求項1に記載の電磁連結装置であって、
前記切替手段は、前記連結部を前記進退方向の一方側に付勢する付勢部材と、電磁力を作用させることによって前記連結部の各前記板状部材を前記進退方向の他方側へ吸引することが可能な電磁石とを有し、
該電磁石によって前記連結部の各前記板状部材に作用する電磁力は、前記付勢部材による付勢力よりも小に設定されているとともに、全ての各前記板状部材に作用する電磁力の合成力は、前記付勢部材による付勢力よりも大に設定されていることを
電磁連結装置。 - 請求項6に記載の電磁連結装置であって、
前記電磁石によっていずれか一枚を除く他の前記板状部材に作用する電磁力の合成力が前記付勢部材による付勢力よりも小に設定されている
電磁連結装置。 - 請求項1に記載の電磁連結装置であって、
前記切替手段は、前記連結部を前記進退方向の一方側に付勢する付勢部材と、電磁力を作用させることによって前記連結部の各前記板状部材を前記進退方向の他方側へ吸引することが可能であり、前記連結部と対向する端面に凹部が形成された電磁石とを有する
電磁連結装置。 - 請求項1に記載の電磁連結装置であって、
前記回転駆動部は、前記連結部と対向して設けられた本体部材と、該本体部材の前記連結部と面する側に該連結部と当接可能に突出して設けられたフェーシング部材とで構成され、
該フェーシング部材の厚さは、前記本体部材の厚さよりも厚く設定されている
電磁連結装置。 - 請求項1から請求項9のいずれかに記載の電磁連結装置であって、
前記回転駆動部が、前記連結部と対向して設けられた本体部材と、該本体部材の前記連結部と面する側に該連結部と当接可能に突出して設けられた第一のフェーシング部材とで構成されるとともに、
前記回転駆動部の前記本体部材と前記連結部との互いに面する側の少なくとも一方には、前記第一のフェーシング部材を形成する材質よりも小さい弾性率の材質からなる第二のフェーシング部材が、前記第一のフェーシング部材が前記連結部に当接するよりも先に他方に当接可能に突出して設けられている
電磁連結装置。
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JP2008172255A JP5286980B2 (ja) | 2008-07-01 | 2008-07-01 | 電磁連結装置 |
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JP (1) | JP5286980B2 (ja) |
KR (1) | KR20110033152A (ja) |
CN (1) | CN102084149B (ja) |
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CN108895099A (zh) * | 2018-08-31 | 2018-11-27 | 浙江西子富沃德电机有限公司 | 一种电磁制动装置 |
WO2020035517A1 (de) * | 2018-08-17 | 2020-02-20 | Knorr-Bremse Gesellschaft Mit Beschränkter Haftung | Zahnhaltebremse für eine fahrzeugtür und verfahren zum betreiben einer zahnhaltebremse |
US11378145B2 (en) * | 2017-10-25 | 2022-07-05 | Warner Electric Europe S.A.S. | Stepped torque braking device |
WO2022216569A1 (en) | 2021-04-05 | 2022-10-13 | Nexen Group, Inc. | Rotary motion control apparatus with zero-backlash |
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US11378145B2 (en) * | 2017-10-25 | 2022-07-05 | Warner Electric Europe S.A.S. | Stepped torque braking device |
WO2020035517A1 (de) * | 2018-08-17 | 2020-02-20 | Knorr-Bremse Gesellschaft Mit Beschränkter Haftung | Zahnhaltebremse für eine fahrzeugtür und verfahren zum betreiben einer zahnhaltebremse |
US12065113B2 (en) | 2018-08-17 | 2024-08-20 | Knorr-Bremse Gesellschaft Mit Beschränkter Haftung | Toothed holding brake for a vehicle door and method for operating a toothed holding brake |
CN108895099A (zh) * | 2018-08-31 | 2018-11-27 | 浙江西子富沃德电机有限公司 | 一种电磁制动装置 |
WO2022216569A1 (en) | 2021-04-05 | 2022-10-13 | Nexen Group, Inc. | Rotary motion control apparatus with zero-backlash |
Also Published As
Publication number | Publication date |
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CN102084149B (zh) | 2013-07-10 |
TW201004108A (en) | 2010-01-16 |
JP5286980B2 (ja) | 2013-09-11 |
JP2010014138A (ja) | 2010-01-21 |
CN102084149A (zh) | 2011-06-01 |
KR20110033152A (ko) | 2011-03-30 |
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