CN204465223U - Bearning mechanism and motor apparatus - Google Patents
Bearning mechanism and motor apparatus Download PDFInfo
- Publication number
- CN204465223U CN204465223U CN201520180486.1U CN201520180486U CN204465223U CN 204465223 U CN204465223 U CN 204465223U CN 201520180486 U CN201520180486 U CN 201520180486U CN 204465223 U CN204465223 U CN 204465223U
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- China
- Prior art keywords
- flange part
- radial bearing
- slit
- motor
- bearning mechanism
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/08—Structural association with bearings
- H02K7/081—Structural association with bearings specially adapted for worm gear drives
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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
- F16H—GEARING
- F16H1/00—Toothed gearings for conveying rotary motion
- F16H1/02—Toothed gearings for conveying rotary motion without gears having orbital motion
- F16H1/04—Toothed gearings for conveying rotary motion without gears having orbital motion involving only two intermeshing members
- F16H1/12—Toothed gearings for conveying rotary motion without gears having orbital motion involving only two intermeshing members with non-parallel axes
- F16H1/16—Toothed gearings for conveying rotary motion without gears having orbital motion involving only two intermeshing members with non-parallel axes comprising worm and worm-wheel
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K21/00—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
- H02K21/12—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets
- H02K21/14—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating within the armatures
- H02K21/145—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating within the armatures having an annular armature coil
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
- Sliding-Contact Bearings (AREA)
- Gears, Cams (AREA)
- Mounting Of Bearings Or Others (AREA)
- Gear Transmission (AREA)
Abstract
Bearning mechanism and have the motor apparatus of this Bearning mechanism, described Bearning mechanism is by improving the holding structure of the radial bearing in framework, even if radial bearing is pressed into framework, cylinder portion also not easily produces distortion etc.In Bearning mechanism (7), radial bearing (71,72) is formed from a resin, and have can by worm screw (2) supporting for the cylinder portion (711,721) that can rotate with from cylinder portion towards the flange part (712,722) that radial outside is expanding.Flange part (712) is pressed between two walls (611,612) of the slit (610) of framework (6), and flange part (722) is pressed between two walls (621,622) of the slit (620) of framework (6).The groove (910,920) at least partially of the part outstanding from slit (610,620) held in flange part (712,722) is formed at outer cover (9) place.
Description
Technical field
The utility model relates to a kind of Bearning mechanism and has the motor apparatus of this Bearning mechanism, and rotating shaft supports as rotating by described Bearning mechanism.
Background technology
Such as, adopt have using rotating shaft supporting for the cylinder portion that can rotate and from cylinder portion towards the bearing of the expanding flange part of radial outside as the radial bearing (with reference to patent documentation 1) of supporting rotating shaft.At this, radial bearing is kept by the method waited in the hole that cylinder portion is pressed into the framework being formed at plate portion etc.
Patent documentation 1: Japanese Unexamined Patent Publication 2010-112553 publication
But, time in hole cylinder portion being pressed into framework, following situation may be there is: cylinder portion is out of shape, and the gap of the out of roundness in cylinder portion or cylinder portion and rotating shaft changes, thus reduce bearing performance.Especially, when radial bearing is formed from a resin, time in hole cylinder portion being pressed into framework, cylinder portion is easily out of shape, thus easily reduces bearing performance.Further, do not display at normal temperatures even if cylinder portion is out of shape the bearing performance reduction caused, but when variation of ambient temperature, the problem that the bearing performance caused because the distortion of cylinder portion reduces just likely displays.
Utility model content
In view of the above-mentioned problems, problem of the present utility model is the motor apparatus providing a kind of Bearning mechanism and have this Bearning mechanism, described Bearning mechanism is by improving the holding structure of the radial bearing in framework, even if when radial bearing is pressed into framework, cylinder portion also not easily produces distortion etc.
In order to solve above-mentioned problem, the feature of the Bearning mechanism involved by the utility model is, this Bearning mechanism has: rotating shaft; Radial bearing, described radial bearing has the supporting of described rotating shaft for the cylinder portion that can rotate with from described cylinder portion towards the flange part that radial outside is expanding; And framework, described framework has slit, and described flange part is contained in inner side by described slit, thus keeps described radial bearing.
In the utility model, radial bearing has by rotating shaft supporting for the cylinder portion that can rotate with from cylinder portion towards the flange part that radial outside is expanding, and radial bearing is housed inside the slit of framework by flange part and is kept by framework.Therefore, when radial bearing is kept by framework, because stress is not easily applied to a portion, therefore cylinder portion not easily produces distortion.Therefore, the out of roundness in cylinder portion or the gap between cylinder portion and rotating shaft not easily change, thus bearing performance not easily reduces.
In the utility model, preferred described radial bearing is formed from a resin.According to this structure, radial bearing can be manufactured at low cost, and can lightweight be realized.Even if in this case, because when radial bearing is kept by framework, stress is not easily applied to a portion, even if therefore radial bearing is formed from a resin, cylinder portion also not easily produces distortion.
In the utility model, preferred described flange part is pressed between two the opposed in the axial direction walls in described slit.According to this structure, radial power is not easily applied to a portion, and therefore cylinder portion not easily produces radial deformation.
In the utility model, the gap in the axial direction between the inwall of preferred described slit and described flange part is narrower than the gap diametrically between the inwall of described slit and described flange part.
In the utility model, preferably when observing from axis direction, described flange part is polygon.According to this structure, flange part plays the function preventing radial bearing from rotating.Such as, preferably when observing from axis direction, described flange part is quadrangle.If flange part is quadrangle, then the length on a limit is the polygon duration of more than pentagon than flange part, therefore has good anti-rotating function.Further, be that the situation of triangle etc. is different from flange part, because opposite limit is parallel, therefore there is good anti-rotating function.
In the utility model, preferred described framework has the bearing-surface from the outer peripheral face in cylinder portion described in radial support in the angular range below 180 °.According to this structure, can by cylinder portion reliably supporting rotating shaft diametrically.
In the utility model, the part contact exposed from described slit in preferably overlapping with described framework outer cover and described flange part.According to this structure, can prevent flange part from coming off from slit.
In the utility model, the part in the circumference of preferred described flange part is given prominence to from described slit, and is formed with groove at described outer cover place, and described groove holds the part of giving prominence to from described slit in described flange part at least partially.According to this structure, can utilize the slit of framework and the groove of outer cover that flange part is remained suitable posture.
In this case, the inwall of preferred described groove and the end contact being positioned at axis direction of described flange part, and gap is had between the inwall and the outer peripheral face of described flange part of described groove.According to this structure, because the power of radial direction is not easily applied to a portion, therefore cylinder portion not easily produces radial deformation.
In the utility model, preferred described radial bearing is configured at two positions separated in the axial direction, and the described radial bearing being arranged at these two positions is respectively to be kept described cylinder portion by described framework towards the mode of another radial bearing side.According to this structure, owing to keeping the position of flange part far away in two radial bearings, therefore, it is possible to keep rotating shaft with stable state.
In the utility model, described radial bearing also can adopt the structure in the both sides of axis direction relative to described flange part with described cylinder portion.According to this structure, to the longer dimension of the axis direction of the bearing-surface (inner peripheral surface in cylinder portion) that rotating shaft supports, therefore, it is possible to keep rotating shaft with stable state.
In the utility model, described rotating shaft is such as worm screw.
Bearning mechanism involved by the utility model such as can be used in motor apparatus, and described motor apparatus has the motor driving described rotating shaft to rotate.
Utility model effect
In the utility model, radial bearing has by rotating shaft supporting for the cylinder portion that can rotate with from cylinder portion towards the flange part that radial outside is expanding, and radial bearing is housed inside the slit of framework by flange part and is kept by framework.Therefore, when radial bearing is kept by framework, stress is not easily applied to a portion, and therefore cylinder portion not easily produces distortion.Therefore, the out of roundness in cylinder portion or the gap between cylinder portion and rotating shaft not easily change, and therefore bearing performance not easily reduces.
Accompanying drawing explanation
Fig. 1 is the stereogram applying motor apparatus of the present utility model.
Fig. 2 is the vertical view applying motor apparatus of the present utility model.
Fig. 3 is the cutaway view of the structure that motor for applying motor apparatus of the present utility model etc. is shown.
Fig. 4 (a), Fig. 4 (b) are the key diagram applying the coupling part between motor motor apparatus of the present utility model and worm screw observed from the outlet side of motor.
Fig. 5 (a), Fig. 5 (b), Fig. 5 (c) are the key diagram of the Bearning mechanism for the motor apparatus involved by the utility model.
Fig. 6 (a), Fig. 6 (b), Fig. 6 (c) stereogram of the Bearning mechanism for the motor apparatus involved by the utility model for observing from jacket side.
Fig. 7 (a), Fig. 7 (b) stereogram of the Bearning mechanism for the motor apparatus involved by the utility model for observing from frame side.
Fig. 8 is the key diagram of the variation that the radial bearing applying Bearning mechanism of the present utility model is shown.
(symbol description)
1 motor apparatus
2 worm screws
3 worm gears
6 frameworks
61,62 supporting boards
610,620 slits
611, the wall of 612,621,622 slits
615,625 bearing-surfaces
7 Bearning mechanisms
71,72 radial bearings
710,720 slits
711,721 portions
712,722 flange parts
713, the outer peripheral face of 723 flange parts
716, the end face of 717,726,727 flange parts
8 compression helical springs
9 outer covers
910,920 grooves
10 motors
Embodiment
With reference to accompanying drawing, the example applying Bearning mechanism of the present utility model and motor apparatus is described.
(overall structure)
Fig. 1 is the stereogram applying motor apparatus 1 of the present utility model.Fig. 2 is the vertical view applying motor apparatus of the present utility model.
Motor apparatus 1 shown in Fig. 1 and Fig. 2 has motor 10, gear mechanism 14, slave unit (not shown) and framework 6, and make to be installed in slave unit or be connected to slave unit by displacements such as movable members, wherein, described motor 10 is as drive source, described gear mechanism 14 transmits the rotation of motor 10, the rotation of motor 10 is passed to described slave unit by gear mechanism 14, and described framework 6 is equiped with motor 10, gear mechanism 14 and slave unit etc.In the present embodiment, the outer cover 9 represented with chain-dotted line is connected to framework 6, and by this outer cover 9, will be used for the covering such as worm screw 2 grade of gear mechanism 14.
Gear mechanism 14 has worm screw 2 (rotating shaft) and worm gear 3, and wherein, the rotation of motor 10 is passed to described worm screw 2, and described worm gear 3 engages with worm screw 2.Be formed with helicla flute 21 at the outer peripheral face 20 of worm screw 2, be formed with the teeth portion 36 engaged with the helicla flute 21 of worm screw 2 at the large-diameter portion 31 of worm gear 3.Worm gear 3 has the concentric minor diameter part 32 with large-diameter portion 31, is formed with teeth portion 37 at the outer peripheral face of minor diameter part 32.Be formed with the axis hole 320 embedded for the fulcrum 65 holded up from framework 6 at minor diameter part 32, worm gear 3 can rotate centered by fulcrum 65.Preferred use helical gear is as worm gear 3.In addition, be fixed with packing ring 69 at the terminal part of fulcrum 65, and utilize packing ring 69 to prevent worm gear 3 from coming off from fulcrum 65.In described motor apparatus 1, if the rotation of motor 10 is delivered to worm gear 3 by worm screw 2, then worm gear 3 rotates by clockwise CW or rotates by counterclockwise CCW centered by fulcrum 65.
(structure of motor 10)
Fig. 3 is the cutaway view of the structure illustrated for applying motor 10 grade in motor apparatus 1 of the present utility model.In addition, in the following description, using on motor axis direction L (axis direction of worm screw 2), motor drive shaft 150 from the outstanding side of motor body 110 as outlet side L1, to be described as exporting opposition side L2 from the side that the side that motor body 110 is outstanding is contrary with motor drive shaft 150.
As shown in Figure 3, motor 10 is stepper motor, and has motor drive shaft 150 from the outstanding shape of columned motor body 110.Motor body 110 has cylindric stator 140, has the stator of A phase and the stator of B phase stacked structure on the L of motor axis direction in the stator 140.Therefore, in the stator 140, be wound with two drum stands 102 (the first drum stand 102A and the second drum stand 102B) overlay configuration on the L of motor axis direction of the ring-type of winding wire 120, and at described drum stand 102 place respectively overlay configuration have inner-stator iron core 103 and external stator core 104.More specifically, in the first drum stand 102A, the both sides overlay configuration of motor axis direction L has the inner-stator iron core 103A of ring-type and cross section to be the external stator core 104A of U-shaped, and in the second drum stand 102B, the both sides overlay configuration of motor axis direction L has the inner-stator iron core 103B of ring-type and cross section to be the external stator core 104B of U-shaped.At the inner peripheral surface of the first drum stand 102A and the second drum stand 102B, multiple poles tooth 131 of inner-stator iron core 103A, 103B and multiple poles tooth 141 of external stator core 104A, 104B are in the structure circumferentially arranged.Constitute the stator 140 of the cylindrical shape with rotor configuration hole 130 thus, and the radially inner side of stator 140 is coaxial is configured with rotor 105.In addition, in the present embodiment, the cross section of external stator core 104A, 104B is formed as U-shaped, and external stator core 104,104B extend to the radial outside of winding wire 120 respectively thus form motor shell.Further, be formed with terminal board (not shown) at drum stand 102 (the first drum stand 102A and the second drum stand 102B) place, substrate 118 is connected to the terminal kept by described terminal board.
In rotor 105, motor drive shaft 150 extends along motor axis direction L.At the lining 156 being connected with cylindrical shape by the position exporting opposition side L2 of motor drive shaft 150, and bonding agent etc. is utilized to be connected with cylindric permanent magnet 159 at the outer peripheral face of lining 156.In this state, the outer peripheral face of permanent magnet 159 and the pole tooth 131,141 of stator 140 opposed across the interval specified.
End plate 160 is fixed with at outlet side L1 by methods such as welding, the hole 166 that the bearing 170 (motor-side radial bearing) being formed with the outlet side of confession motor drive shaft 150 at end plate 160 place embeds and the hole 167 for installation frame 6 relative to stator 140.In the present embodiment, be formed with stage portion 171 at the outer peripheral face of bearing 170, abutted by the face of stage portion 171 with the output opposition side L2 of end plate 160, limit bearing 170 and move towards outlet side L1.
Around motor drive shaft 150, circular packing ring 176 is installed between bearing 170 and lining 156.In the motor 10 of this structure, the mobile range towards outlet side L1 of motor drive shaft 150 is specified by bearing 170.In addition, sometimes packing ring 176 is omitted.
Be fixed with plate portion 180 at output opposition side L2 by methods such as welding relative to stator 140, be formed with the hole 186 supplying the bearing 190 (motor-side radial bearing) of the output opposition side L2 of motor drive shaft 150 to embed at place of plate portion 180.In the present embodiment, be formed with stage portion 191 at the outer peripheral face of bearing 190, and abutted with the face of the output opposition side L2 in plate portion 180 by stage portion 191, limit bearing 190 and move towards outlet side L1.
Around motor 150, circular packing ring 196,197 is installed between bearing 190 and lining 156, is positioned at the packing ring 197 and the end contact of the outlet side L1 of bearing 190 that export opposition side L2.In the motor 10 of this structure, being specified by bearing 190 towards the mobile range exporting opposition side L2 of motor drive shaft 150.In addition, one piece of packing ring also can be adopted to replace two pieces of packing rings 196,197.
(syndeton of motor drive shaft 150 and worm screw 2)
Fig. 4 (a), Fig. 4 (b) are the key diagram applying motor motor apparatus 1 of the present utility model 10 and the coupling part of worm screw 2 observed from the outlet side L1 of motor 10, Fig. 4 (a) is motor 10 and the stereogram of the coupling part of worm screw 2, and Fig. 4 (b) is motor 10 and the exploded perspective view of the coupling part of worm screw 2.
As shown in Fig. 3 and Fig. 4 (a), Fig. 4 (b), the motor drive shaft 150 of motor 10 is linked together by shaft coupling 13 (transmission mechanism) with worm screw 2, and shaft coupling 13 is formed as the two-layer configuration of the first shaft coupling 11 and the second shaft coupling 12.
In the first shaft coupling 11, motor-side shaft coupling portion 4 (driving side shaft coupling portion) be connected to motor drive shaft 150 with the end 151 (terminal part) of motor body 110 side opposite side, the transferring elements 5 (slave end joint member) be combined with motor-side shaft coupling portion 4 is connected to the end 27 by motor body 110 side of worm screw 2.Therefore, motor drive shaft 150 and worm screw 2 link together by motor-side shaft coupling portion 4 and transferring elements 5.
Motor-side shaft coupling portion 4 has round plate 41 and the first protuberance 42, described first protuberance 42 giving prominence to towards the side contrary with motor body 110 with the end face of motor body 110 opposite side at round plate 41.Be formed with axis hole 43 at the center in motor-side shaft coupling portion 4, the end 151 of motor drive shaft 150 is embedded in axis hole 43.At end 151 place of motor drive shaft 150, a part for circumference is formed as tabular surface 152, and a part for the circumference of the inner peripheral surface of axis hole 43 is formed as tabular surface (not shown), and overlapped each other with the tabular surface of axis hole 43 by the tabular surface 152 of motor drive shaft 150, prevent motor-side shaft coupling portion 4 and motor drive shaft 150 from dallying.In addition, the through round plate 41 of axis hole 43 and the first protuberance 42, first protuberance 42 are divided into two the first protuberances 42 in the longitudinal direction by axis hole 43.
Transferring elements 5 in roughly cylindric, and spreads all over whole the first recess 51 being formed radially the channel-shaped supplying first protuberance 42 in motor-side shaft coupling portion 4 to embed at the end face by motor body 110 side of transferring elements 5.
In the first shaft coupling 11 so formed, the first recess 51 spreads all over whole radial direction and extends, and two the first protuberances 42 are embedded into the two ends of the first recess 51.Therefore, the loss when rotation in motor-side shaft coupling portion 4 is passed to transferring elements 5 is little.Further, the bearing of trend of the first recess 51 and the orientation of two the first protuberances 42 be with the L-orthogonal of motor axis direction first direction L51, motor-side shaft coupling portion 4 and transferring elements 5 can relative movements on first direction L51.
When formation the second shaft coupling 12, transferring elements 5 with the end face of motor body 110 side opposite side, the position formation that two the second recesses 52 separate diametrically, is formed with the shaft coupling portion, worm screw side 26 be embedded in the second recess 52 in the end 27 of worm screw 2.The second shaft coupling 12 is formed by described second recess 52 and shaft coupling portion, described worm screw side 26.At this, shaft coupling portion, worm screw side 26 is made up of two the second protuberances 28, described two the second protuberances 28 are given prominence to from the position separated diametrically towards the end face by worm screw 2 side of transferring elements 5 in leaning in the end face 292 of motor body 110 of worm screw 2, and two the second protuberances 28 are embedded in two the second recesses 52 respectively.
In the present embodiment, be formed configure hole 23 with the spring of worm screw 2 coaxial in the inside of worm screw 2, described spring configuration hole 23 is at end face 292 opening by motor body 110 side.Therefore, two the second protuberances 28 being configured at two positions at 180 °, interval in the circumferential in the around openings in spring configuration hole 23 are formed at the end face 292 of worm screw 2.Therefore, be configured to by compression helical spring 8 under the state in spring configuration hole 23, compression helical spring 8 is between two the second protuberances 28.
In the second shaft coupling 12 so formed, because two the second protuberances 28 are embedded in two the second recesses 52 respectively, loss when therefore the rotation of transferring elements 5 is passed to worm screw 2 is little.Further, the orientation (orientations of two the second protuberances 28) of two the second recesses 52 is second direction L52 with the L-orthogonal of motor axis direction and crossing with first direction L51.
At this, the angle direction around axis between first direction L51 (bearing of trend of the first recess 51 and the orientation of two the first protuberances 42) with second direction L52 (bearing of trend of the second recess 52 and the orientation of two the second protuberances 28) differs 90 °.Therefore, transferring elements 5 is orthogonal relative to the movable direction (second direction L52) in shaft coupling portion, worm screw side 26 with transferring elements 5 relative to the movable direction (first direction L51) in motor-side shaft coupling portion 4.
In the motor apparatus 1 of this structure, if the motor drive shaft 150 of motor 10 rotates, then in the first shaft coupling 11, motor-side shaft coupling portion 4 rotates, and the rotation in motor-side shaft coupling portion 4 is passed to transferring elements 5 by the first protuberance 42 and the first recess 51.Further, in the second shaft coupling 12, the rotation of transferring elements 5 is passed to worm screw 2 by the second recess 52 and the second protuberance 28.In the present embodiment, motor-side shaft coupling portion 4 is formed from a resin, and transferring elements 5 is the elastomeric element be made up of rubber etc.Therefore, it is possible to sponge motor drive shaft 150 vibration when rotated by transferring elements 5.
(structure of worm screw 2 and compression helical spring 8)
As shown in Fig. 3 and Fig. 4 (a), Fig. 4 (b), in the motor apparatus 1 of present embodiment, the outer peripheral face 20 of worm screw 2 has in the both sides of motor axis direction L in the region being formed with helicla flute 21 region 22,25 not being formed with helicla flute 21, worm screw 2 in the region 22,25 not being formed with helicla flute 21 by radial bearing 71,72 (worm screw side radial bearing) supporting for rotating.The detailed construction that have employed the Bearning mechanism 7 of described radial bearing 71,72 will be described hereinafter.
Worm screw 2 with the end 291 of motor body 110 opposite side in hemisphere face, the end 291 of described worm screw 2 is supported by the thrust bearing 73 of tabular of the groove 673 being held in framework 6.
In the present embodiment, the spring configuration hole 23 being formed at worm screw 2 is utilized to be configured between worm screw 2 and motor drive shaft 150 by compression helical spring 8, worm screw 2 exerts a force towards the side contrary with motor body 110 side by described compression helical spring 8, and is exerted a force towards motor-side shaft coupling portion 4 by transferring elements 5.Consequently, motor drive shaft 150 exerts a force towards motor body 110 side by transferring elements 5 and motor-side shaft coupling portion 4 by compression helical spring 8.
More specifically, in the inside of worm screw 2, spring configuration hole 23 becomes and extends to by the end face 292 of motor body 110 side the deep hole being formed with the position of helicla flute 21 at outer peripheral face from worm screw 2, and has compression helical spring 8 in the internal configurations in described spring configuration hole 23.In this state, one end (side contrary with motor body 110 side) of compression helical spring 8 abuts with the stage portion 231 being formed at spring and configuring the inside in hole 23, and the other end of compression helical spring 8 (motor body 110 side) abuts with transferring elements 5.Therefore, compression helical spring 8 be configured in transferring elements 5 and worm screw 2 and between the end of transferring elements 5 side opposite side.
Therefore, worm screw 2 exerts a force towards the side (outlet side L1) contrary with motor body 110 side by compression helical spring 8, and is exerted a force towards motor body 110 side (exporting opposition side L2) by motor drive shaft 150 by shaft coupling 11 (transferring elements 5 and motor-side shaft coupling portion 4).
In the present embodiment, worm screw 2 is made up of resins such as POM (polyacetal resin), in the inside of worm screw 2, configure with spring intercommunicating pore 24 that hole 23 is communicated with and configure hole 23 relative to spring and extend along axis direction (motor axis direction L) in the side contrary with end face 292.Therefore, there is not excessive thick wall part at worm screw 2 place.It is identical that intercommunicating pore 24 and spring configure hole 23, is formed as and worm screw 2 coaxial, and the internal diameter of intercommunicating pore 24 is less than the internal diameter in spring configuration hole 23.Therefore, in spring configuration hole 23, the stage portion 231 being formed at the coupling part between intercommunicating pore 24 becomes circular step portion, described stage portion 231 (circular step portion) become accept compression helical spring 8 with the spring continuing surface 230 of the end of motor body 110 side opposite side.
(detailed construction of Bearning mechanism 7)
Fig. 5 (a), Fig. 5 (b), Fig. 5 (c) are the key diagram for the Bearning mechanism 7 in the motor apparatus 1 involved by the utility model, Fig. 5 (a) is for utilizing outer cover 9 by the stereogram of covered for worm screw 2 state, Fig. 5 (b) is cutaway view when being cut off along the axis direction L of worm screw 2 by Bearning mechanism 7, and Fig. 5 (c) is cutaway view when being cut off by Bearning mechanism 7 on the direction of the axis vertical take-off with worm screw 2.Fig. 6 (a), Fig. 6 (b), Fig. 6 (c) stereogram for the Bearning mechanism 7 in the motor apparatus 1 involved by the utility model for observing from outer cover 9 side, Fig. 6 (a) is the stereogram of the state after being taken off from framework 6 by outer cover 9, Fig. 6 (b) is the stereogram of the state after being taken off from framework 6 by worm screw 2 further, and Fig. 6 (c) is the stereogram of the state after being taken off from worm screw 2 by radial bearing 71,72.Fig. 7 (a), Fig. 7 (b) stereogram for the Bearning mechanism 7 in the motor apparatus 1 involved by the utility model for observing from framework 6 side, Fig. 7 (a) covers the stereogram of the state of worm screw 2 for outer cover 9, Fig. 7 (b) is the stereogram of the state after being taken off from worm screw 2 by outer cover 9.
As shown in Fig. 5 (a), Fig. 5 (b), Fig. 5 (c) and Fig. 6 (a), Fig. 6 (b), Fig. 6 (c), in the motor apparatus 1 of present embodiment, between the base plate 60 and outer cover 9 of framework 6, be configured with worm screw 2 (rotating shaft), thus constitute and utilize two radial bearings 71,72 worm screw 2 to be supported Bearning mechanism 7 for rotating.
In the present embodiment, radial bearing 71,72 is configured at the position separated on the axis direction of worm screw 2, but their structure is identical.Specifically, radial bearing 71 there is cylindric cylinder portion 711 and in the end in cylinder portion 711 towards the expanding flange part 712 of radial outside, radial bearing 72 there is cylindric cylinder portion 721 and in the end in cylinder portion 721 towards the expanding flange 722 of radial outside, and radial bearing 71,72 is kept by the supporting board 61,62 of framework 6 respectively.
When observing radial bearing 71,72 from axis direction, flange part 712,722 is polygon.In the present embodiment, when observing radial bearing 71,72 from axis direction, although flange part 712,722 bight is bending, quadrangle is substantially.In the present embodiment, radial bearing 71,72 is made up of resins such as PBT (PA polybutyleneterephthalate), and the wall thickness of radial bearing 71,72 is all roughly the same at all sites.
In addition, the structure of radial bearing 71,72 is identical, and keeps the structure of the supporting board 61 of radial bearing 71 identical with the structure of the supporting board 62 keeping radial bearing 72.Therefore, in the following description, be described centered by the structure of radial bearing 71 and supporting board 61.
In the present embodiment, be formed with the roughly semicircular hole 614 supplying the end of worm screw 2 to pass at supporting board 61, hole 614 is open state in the side at outer cover 9 place.At this, be formed with the slit 610 of the inner peripheral surface opening in hole 614 at supporting board 61.Slit 610 is formed as the degree of depth of the flange part 712 that can hold radial bearing 71, and the bottom of slit 610 is formed as the shape corresponding with the flange part 712 of radial bearing 71.
Further, in the inner side of slit 610, the interval of two opposed in the axial direction walls 611,612 is equal with the thickness of flange part 712 or slightly less than it.Therefore, if after radial bearing 71 is embedded into worm screw 2, be pressed into by flange part 712 between two walls 611,612, then flange part 712 is maintained at the inner side of slit 610, and radial bearing 71 is fixed on the supporting board 61 of framework 6.In this state, two walls 611,612 are close to from the both sides of axis direction and two end faces 716,717 of flange part 712, and between the inwall and the outer peripheral face 713 of flange part 712 of slit 610, have small gap g2 (with reference to Fig. 5 (c)).Thus, as shown in Fig. 5 (b), the inwall of slit 610 and the gap g1 in the axial direction of flange part 712 than the inwall of slit 610 and the gap g2 diametrically of flange part 712 narrow.
In the present embodiment, radial bearing 71 is to be fixed on supporting board 61 by cylinder portion 711 towards the state of radial bearing 72, be configured with bearing-surface 615 at the supporting board 61 of framework 6, described bearing-surface 615 is in arc-shaped, and the outer peripheral face in radial bearing 72 side from radial outside carrying cylinder portion 711.At this, formed in the angular range of bearing-surface 615 below 180 °, such as, formed in the angular range of 120 ° to 180 °.Therefore, bearing-surface 615 can not become obstruction when being pressed in slit 610 by flange part 712.
Further, supporting board 62 is identical with supporting board 61, is also formed with the roughly semicircular hole 624 supplying the end of worm screw 2 to pass, is formed with the slit 620 at hole 624 place opening at supporting board 62 place.Therefore, if after radial bearing 72 is embedded into worm screw 2, between two walls 621,622 again flange part 722 being pressed into slit 620, then two end faces 726,727 of two walls 621,622 and flange part 722 are close to, thus radial bearing 72 is fixed in the supporting board 62 of framework 6.In this state, radial bearing 72 by cylinder portion 721 towards radial bearing 71.Therefore, be configured with bearing-surface 625 at supporting board 62, described bearing-surface 625 is in arc-shaped, and the outer peripheral face in radial bearing 71 side from radial outside carrying cylinder portion 721.At this, formed in the angular range of bearing-surface 625 below 180 °, such as, formed in the angular range of 120 ° to 180 °.Therefore, bearing-surface 625 can not become obstruction when being pressed in slit 620 by flange part 722.
(anticreep of radial bearing 71,72)
In the motor apparatus 1 of present embodiment, be formed with the cylindrical portion 68 for stationary housings 9 at framework 6 place.Therefore, if be fastened in cylindrical portion 68 by screw 99 through outer cover 9 under the state that outer cover 9 is covered to framework 6, then outer cover 9 can be installed to framework 6.In this state, outer cover 9 and the part contact exposed from slit 610,620 in the flange part 712,722 of radial bearing 71,72, thus prevent flange part 712,722 to come off from slit 610,620.
In the present embodiment, outer cover 9 has the projection 91,92,93 of the flat part 90 of rectangle and the outstanding multiple ribbed of base plate from flat part 90 towards framework 6 60, projection 93 in described projection 91,92,93 abuts with the thrust bearing 73 of the tabular be described with reference to Fig. 2 etc., thus prevents thrust bearing 73 to come off from the groove 673 of framework 6.
Further, projection 91 is formed as oval shape, and forms groove 910 in the region that the flange part 712 with radial bearing 71 is overlapping, and projection 92 is formed as oval shape, and forms groove 920 in the region that the flange part 722 with radial bearing 72 is overlapping.
Therefore, as shown in Fig. 6 (b), under the state that radial bearing 71,72 is fixed to framework 6, because a part for the flange part 712,722 of radial bearing 71,72 is outstanding from supporting board 61,62 towards outer cover 9 side, if therefore install outer cover 9 in the mode covering radial bearing 71,72, then a part for the part outstanding from supporting board 61,62 in flange part 712,722 is contained in the groove 910,920 of outer cover 9.
At this, the degree of depth (the outstanding size of projection 91,92) of groove 910,920 is larger than the height protruding from the part of supporting board 61,62 of the flange part 712,722 of radial bearing 71,72.Therefore, as shown in Fig. 5 (b), between the outer peripheral face 713 of the flange part 712 of the bottom of groove 910 and radial bearing 71, have gap g3, but projection 91 abuts with the cylinder portion 711 of radial bearing 71, thus prevent radial bearing 71 to come off from slit 610.Further, between the outer peripheral face 723 of the flange part 722 of the bottom of groove 920 and radial bearing 72, have gap g3, but projection 92 abuts with the cylinder portion 721 of radial bearing 72, thus prevent radial bearing 72 to come off from slit 620.Further, the width of groove 910,920 is larger than the thickness of flange part 712,722.Therefore, the inwall of groove 910 does not contact with the end face 716,717 of flange part 712, and the inwall of groove 920 does not contact with the end face 726,727 of flange part 722.
(main efficacy results of present embodiment)
As described above, in the Bearning mechanism 7 and motor apparatus 1 of present embodiment, radial bearing 71 has worm screw 2 (rotating shaft) supporting for the cylinder portion 711 that can rotate with from cylinder portion 711 towards the flange part 712 that radial outside is expanding, radial bearing 72 has by worm screw 2 (rotating shaft) supporting for the cylinder portion 721 that can rotate with from cylinder portion 721 towards the flange part 722 that radial outside is expanding, and radial bearing 71,72 is housed inside the slit 610,620 of framework 6 by flange part 712,722 and is kept by framework 6.Therefore, when radial bearing 71,72 is kept by framework 6, because stress is not easily applied to a portion 711,721, therefore cylinder portion 711,721 not easily produces distortion.Therefore, the gap of the out of roundness in cylinder portion 711,721 or cylinder portion 711,721 and rotating shaft not easily changes, and therefore bearing performance not easily reduces.
Further, because radial bearing 71,72 is formed from a resin, therefore, it is possible to manufacture radial bearing 71,72 at low cost, and lightweight can be realized.Even if in this case, due to when radial bearing 71,72 is kept by framework 6, stress is not easily applied to place of a portion 711,721, even if therefore radial bearing 71,72 is formed from a resin, cylinder portion 711,721 also not easily deforms.
Further, flange part 712 is pressed between two walls 611,612 of slit 610, and flange part 722 is pressed between two walls 621,622 of slit 620.Therefore, radial power is not easily applied to a portion 711,721, and therefore cylinder portion 711,721 not easily produces radial deformation.Further, because when observing from axis direction, flange part 712,722 is polygon, therefore flange part 712,722 plays the function preventing radial bearing 71,72 from rotating.And when observing from axis direction, flange part 712,722 is quadrangle.Therefore, the length on a limit of flange part 712,722 is longer, therefore has good anti-rotating function.Further, be that the situation of triangle etc. is different from flange part 712,722, because opposite limit is parallel, therefore there is good anti-rotating function.Further, due to the bearing-surface 615,625 from the outer peripheral face in radial support cylinder portion 711,721 in the angular range that framework 6 has below 180 °, therefore, it is possible to reliably support worm screw 2 diametrically by cylinder portion 711,721.
And, the outer cover 9 overlapping with framework 6 and the part contact exposed from slit 610,620 in flange part 712,722.Therefore, it is possible to prevent flange part 712,722 from coming off from slit 610,620.Further, be formed with groove 910,920 at outer cover 9 place, the part outstanding from slit 610,620 in described groove 910,920 accommodation flange part 712,722 at least partially.Therefore, it is possible to flange part 712,722 is remained correct posture by the slit 610,620 of framework 6 and the groove 910,920 of outer cover 9.Further, the inwall of groove 910 contacts with the end face 716,717 of flange part 712, and has gap between the inwall and the outer peripheral face 713 of flange part 712 of groove 910.Equally, the inwall of groove 920 contacts with the end face 726,727 of flange part 722, and has gap between the inwall and the outer peripheral face 723 of flange part 722 of groove 920.Therefore, radial power is not easily applied to a portion 711,721, and therefore cylinder portion 711,721 not easily produces radial deformation.
And two radial bearings 71,72 are respectively to be kept cylinder portion 711,721 by framework 6 towards the mode of another radial bearing side.Therefore, owing to keeping the position of flange part 712,722 comparatively far away in two radial bearings 71,72, therefore, it is possible to keep worm screw 2 with stable state.
(variation of radial bearing 71)
Fig. 8 is the key diagram of the variation that the radial bearing 71 applying Bearning mechanism 7 of the present utility model is shown.In the above-described embodiment, radial bearing 71 only has a portion 711 in the side of flange part 712, but as shown in Figure 8, also can adopt the structure in the both sides of axis direction relative to flange part 712 with a portion 711.According to this structure, because the size of the axis direction of bearing-surface (inner peripheral surface in cylinder portion 711) supported worm screw 2 (rotating shaft) is long, therefore, it is possible to keep worm screw 2 with stable state.In addition, radial bearing 72 too.
(other execution modes)
In the above-described embodiment, rotating shaft is worm screw 2, but also the utility model can be applied to the Bearning mechanism 7 supported the rotating shaft being provided with horizontal gear etc.
Further, in the above-described embodiment, use stepper motor as motor 10, but also can use other brushless motor or brush motors etc.
Claims (16)
1. a Bearning mechanism, is characterized in that, described Bearning mechanism comprises:
Rotating shaft;
Radial bearing, described radial bearing has the supporting of described rotating shaft for the cylinder portion that can rotate with from described cylinder portion towards the flange part that radial outside is expanding; And
Framework, described framework has slit, and described flange part is contained in inner side by described slit, thus keeps described radial bearing.
2. Bearning mechanism according to claim 1, is characterized in that,
Described radial bearing is formed from a resin.
3. Bearning mechanism according to claim 1, is characterized in that,
Described flange part is pressed between two the opposed in the axial direction walls in described slit.
4. Bearning mechanism according to claim 1, is characterized in that,
The inwall of described slit and the gap in the axial direction of described flange part than the inwall of described slit and the gap diametrically of described flange part narrow.
5. Bearning mechanism according to claim 4, is characterized in that,
When observing from axis direction, described flange part is polygon.
6. Bearning mechanism according to claim 5, is characterized in that,
When observing from axis direction, described flange part is quadrangle.
7. the Bearning mechanism according to any one in claim 1 to 6, is characterized in that,
Described framework has the bearing-surface from the outer peripheral face in cylinder portion described in radial support in the angular range below 180 °.
8. the Bearning mechanism according to any one in claim 1 to 6, is characterized in that,
The part contact exposed from described slit of the outer cover overlapping with described framework and described flange part.
9. Bearning mechanism according to claim 8, is characterized in that,
A part for the circumference of described flange part is given prominence to from described slit,
Be formed with groove at described outer cover place, described groove holds the part of giving prominence to from described slit in described flange part at least partially.
10. Bearning mechanism according to claim 9, is characterized in that,
The inwall of described groove and the end contact being positioned at axis direction of described flange part, and gap is had between the inwall and the outer peripheral face of described flange part of described groove.
11. Bearning mechanisms according to any one in claim 1 to 6, is characterized in that,
Described radial bearing is configured at two positions separated in the axial direction,
Be arranged at the described radial bearing at described two positions respectively to make described cylinder portion be kept towards the mode of another radial bearing side by described framework.
12. Bearning mechanisms according to any one in claim 1 to 6, is characterized in that,
Described radial bearing has described cylinder portion relative to described flange part both sides in the axial direction.
13. Bearning mechanisms according to any one in claim 1 to 6, is characterized in that,
Described rotating shaft is worm screw.
14. Bearning mechanisms according to any one in claims 1 to 3, is characterized in that,
When observing from axis direction, described flange part is polygon.
15. Bearning mechanisms according to claim 14, is characterized in that,
When observing from axis direction, described flange part is quadrangle.
16. 1 kinds of motor apparatus, is characterized in that,
Described motor apparatus has the Bearning mechanism described in any one in claim 1 to 15, and described motor apparatus has the motor driving described rotating shaft to rotate.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2014-073749 | 2014-03-31 | ||
| JP2014073749A JP6353258B2 (en) | 2014-03-31 | 2014-03-31 | Bearing mechanism and motor device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204465223U true CN204465223U (en) | 2015-07-08 |
Family
ID=53672050
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510140630.3A Active CN104953750B (en) | 2014-03-31 | 2015-03-27 | Bearning mechanism and motor apparatus |
| CN201520180486.1U Withdrawn - After Issue CN204465223U (en) | 2014-03-31 | 2015-03-27 | Bearning mechanism and motor apparatus |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510140630.3A Active CN104953750B (en) | 2014-03-31 | 2015-03-27 | Bearning mechanism and motor apparatus |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP6353258B2 (en) |
| CN (2) | CN104953750B (en) |
| WO (1) | WO2015151891A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104953750A (en) * | 2014-03-31 | 2015-09-30 | 日本电产三协株式会社 | Bearing mechanism and motor device |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP7332299B2 (en) * | 2018-01-17 | 2023-08-23 | Ntn株式会社 | Plain bearing, bearing device, and image forming device |
| JP7309408B2 (en) * | 2019-03-28 | 2023-07-18 | ニデックインスツルメンツ株式会社 | Opening/closing member driving device and toilet lid opening/closing unit |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5732226U (en) * | 1980-07-31 | 1982-02-19 | ||
| JP3271197B2 (en) * | 1992-06-30 | 2002-04-02 | ソニー株式会社 | Bearing device |
| TWI283957B (en) * | 2004-02-13 | 2007-07-11 | Samsung Electro Mech | Bar type vibration motor |
| JP2007228707A (en) * | 2006-02-22 | 2007-09-06 | Nippon Densan Corp | Spindle motor |
| JP2008241034A (en) * | 2007-02-26 | 2008-10-09 | Mitsuba Corp | Bearing device, bearing device assembling method, electric motor using bearing device, and electric motor device using bearing device |
| JP5645070B2 (en) * | 2010-11-09 | 2014-12-24 | 株式会社ジェイテクト | Electric power steering device |
| JP5678623B2 (en) * | 2010-12-03 | 2015-03-04 | 株式会社ジェイテクト | Reducer, electric power steering apparatus including the same, and method of manufacturing the reducer |
| JP6353258B2 (en) * | 2014-03-31 | 2018-07-04 | 日本電産サンキョー株式会社 | Bearing mechanism and motor device |
-
2014
- 2014-03-31 JP JP2014073749A patent/JP6353258B2/en active Active
-
2015
- 2015-03-23 WO PCT/JP2015/058652 patent/WO2015151891A1/en active Application Filing
- 2015-03-27 CN CN201510140630.3A patent/CN104953750B/en active Active
- 2015-03-27 CN CN201520180486.1U patent/CN204465223U/en not_active Withdrawn - After Issue
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104953750A (en) * | 2014-03-31 | 2015-09-30 | 日本电产三协株式会社 | Bearing mechanism and motor device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104953750B (en) | 2018-01-05 |
| JP6353258B2 (en) | 2018-07-04 |
| WO2015151891A1 (en) | 2015-10-08 |
| CN104953750A (en) | 2015-09-30 |
| JP2015197112A (en) | 2015-11-09 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20150708 Effective date of abandoning: 20180105 |