CN104953750B - Bearning mechanism and motor apparatus - Google Patents
Bearning mechanism and motor apparatus Download PDFInfo
- Publication number
- CN104953750B CN104953750B CN201510140630.3A CN201510140630A CN104953750B CN 104953750 B CN104953750 B CN 104953750B CN 201510140630 A CN201510140630 A CN 201510140630A CN 104953750 B CN104953750 B CN 104953750B
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- Prior art keywords
- flange part
- bearning mechanism
- radial bearing
- slit
- motor
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- 230000007246 mechanism Effects 0.000 title claims abstract description 54
- 239000011347 resin Substances 0.000 claims abstract description 11
- 229920005989 resin Polymers 0.000 claims abstract description 11
- 230000002093 peripheral effect Effects 0.000 claims description 25
- 230000008878 coupling Effects 0.000 description 38
- 238000010168 coupling process Methods 0.000 description 38
- 238000005859 coupling reaction Methods 0.000 description 38
- 230000006835 compression Effects 0.000 description 12
- 238000007906 compression Methods 0.000 description 12
- 238000012856 packing Methods 0.000 description 8
- 241000237858 Gastropoda Species 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 5
- 239000011148 porous material Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 229920001707 polybutylene terephthalate Polymers 0.000 description 2
- 229920006324 polyoxymethylene Polymers 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 229930182556 Polyacetal Natural products 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000007767 bonding agent Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
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
-
- 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
-
- 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
Landscapes
- 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
A kind of Bearning mechanism and the motor apparatus with the Bearning mechanism, the Bearning mechanism is by improving the holding structure of the radial bearing in framework, even if radial bearing is pressed into framework, cylinder portion is not easy to be deformed.In Bearning mechanism (7), radial bearing (71,72) is formed from a resin, and is radially oriented the expanding flange part (712,722) in outside with the cylinder portion (711,721) that can be supported worm screw (2) as that can rotate and from cylinder portion.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).In at least one of groove (910,920) of outer cover (9) place formed with the part prominent from slit (610,620) in accommodating flange part (712,722).
Description
Technical field
The present invention relates to a kind of Bearning mechanism and the motor apparatus with the Bearning mechanism, the Bearning mechanism will rotate
E axle supporting is to rotate.
Background technology
For example, use with will rotate e axle supporting be the cylinder portion that can rotate and be radially oriented from cylinder portion on the outside of it is expanding convex
Radial bearing of the bearing of edge as supporting rotating shaft (with reference to patent document 1).Here, radial bearing is by the way that cylinder portion is pressed into
In to the hole for the framework for being formed at plate portion etc. wait method and be kept.
Patent document 1：Japanese Unexamined Patent Publication 2010-112553 publications
However, when cylinder portion is pressed into the hole of framework, it is possible that situations below：Cylinder portion deforms, in cylinder portion
Out of roundness or the change of cylinder portion and the gap of rotary shaft, so as to reduce bearing performance.The feelings being especially formed from a resin in radial bearing
Under condition, when cylinder portion is pressed into the hole of framework, cylinder portion is easily deformed, so as to be easily reduced bearing performance.Also, even if cylinder
Bearing performance caused by portion's deformation reduces not to be displayed at normal temperatures, but in variation of ambient temperature, because of the deformation of cylinder portion
The problem of caused bearing performance reduces is possible to display.
The content of the invention
In view of the above-mentioned problems, problem of the invention is to provide a kind of Bearning mechanism and the horse with the Bearning mechanism
Up to device, the Bearning mechanism is pressed into by improving the holding structure of the radial bearing in framework even in by radial bearing
In the case of framework, cylinder portion is not easy to be deformed.
In order to solve above-mentioned problem, Bearning mechanism involved in the present invention is characterised by that the Bearning mechanism has：Rotation
Axle；Radial bearing, it is the cylinder portion that can rotate and from cartridge direction that the radial bearing, which has the rotation e axle supporting,
The expanding flange part of radial outside；And framework, the framework have slit, the flange part is accommodated in the inner by the slit
Side, so as to keep the radial bearing.
In the present invention, radial bearing has and will rotate e axle supporting and be the cylinder portion that can rotate and be radially oriented from cylinder portion outer
The expanding flange part in side, radial bearing are housed inside the slit of framework to be kept by framework by flange part.Therefore, to mandrel
Hold when being kept by framework, because stress is not easy to be applied to a portion, therefore cylinder portion is not likely to produce deformation.Therefore, the proper circle in cylinder portion
Degree or the gap between cylinder portion and rotary shaft are not easy to change, so as to which bearing performance is not easy to reduce.
In the present invention, it is preferred to the radial bearing is formed from a resin.According to the structure, can manufacture at low cost centripetal
Bearing, and lightweight can be realized.Even if in this case, due to when radial bearing is kept by framework stress be not easy to apply
A portion is added to, therefore even if radial bearing is formed from a resin, cylinder portion is not easy to be deformed.
In the present invention, it is preferred to the flange part is pressed into opposed in the axial direction two wall in the slit
Between face.According to the structure, the power of radial direction is not easy to be applied to a portion, therefore cylinder portion is not likely to produce radial deformation.
In the present invention, it is preferred to the institute of gap-ratio in the axial direction between the inwall of the slit and the flange part
The gap diametrically stated between the inwall of slit and the flange part is narrow.
In the present invention, it is preferred to when from from axis direction, the flange part is polygon.It is convex according to the structure
Edge plays the function of preventing that radial bearing from rotating.For example, it is preferable to when from from axis direction, the flange part is four sides
Shape.If flange part is quadrangle, the length of a line has than the polygon duration that flange part is more than pentagon
Good anti-rotating function.Also, it is different from the situation that flange part is triangle etc., because opposite side is parallel, therefore have
Good anti-rotating function.
In the present invention, it is preferred to the framework has in angular range below 180 ° from radial support cartridge
The bearing-surface of outer peripheral face., can be by cylinder portion diametrically reliably supporting rotating shaft according to the structure.
In the present invention, it is preferred in the outer cover overlapping with the framework and the flange part from the portion that the slit exposes
Tap is touched.According to the structure, it can prevent flange part from being come off from slit.
In the present invention, it is preferred to the part in the circumference of the flange part protrudes from the slit, and described outer
Formed with groove at cover, the groove accommodates at least a portion from the part that the slit protrudes in the flange part.According to this
Structure, it can utilize the slit of framework and the groove of outer cover that flange part is remained to appropriate posture.
In such a situation it is preferred to the end contact positioned at axis direction of the inwall of the groove and the flange part, and
Gap is there are between the inwall of the groove and the outer peripheral face of the flange part.According to the structure, because the power of radial direction is not easy
A portion is applied to, therefore cylinder portion is not likely to produce radial deformation.
In the present invention, it is preferred to which the radial bearing is configured at two separated in the axial direction positions, and it is arranged at
The radial bearing at the two positions respectively by by cartridge towards another radial bearing side in a manner of by the framework
Keep.According to the structure, because the position of holding flange portion in two radial bearings is remote, therefore can be kept with stable state
Rotary shaft.
In the present invention, the radial bearing can also use has institute relative to the flange part in the both sides of axis direction
State the structure in a portion.According to the structure, the chi of the axis direction of the bearing-surface supported to rotary shaft (inner peripheral surface in cylinder portion)
It is very little longer, therefore rotary shaft can be kept with stable state.
In the present invention, the rotary shaft is, for example, worm screw.
Bearning mechanism involved in the present invention for example can be used in motor apparatus, and the motor apparatus, which has, drives the rotation
The motor of rotating shaft rotation.
Invention effect
In the present invention, radial bearing has and will rotate e axle supporting and be the cylinder portion that can rotate and be radially oriented from cylinder portion outer
The expanding flange part in side, radial bearing are housed inside the slit of framework to be kept by framework by flange part.Therefore, to mandrel
Hold when being kept by framework, stress is not easy to be applied to a portion, therefore cylinder portion is not likely to produce deformation.Therefore, the out of roundness in cylinder portion or
Gap between cylinder portion and rotary shaft is not easy to change, therefore bearing performance is not easy to reduce.
Brief description of the drawings
Fig. 1 is the stereogram for applying the motor apparatus of the present invention.
Fig. 2 is the top view for applying the motor apparatus of the present invention.
Fig. 3 is the sectional view for showing the structure for applying the motor of motor apparatus of the invention etc..
Fig. 4 (a), Fig. 4 (b) be motor in the motor apparatus for applying the present invention observed from the outlet side of motor with
The explanation figure of coupling part between worm screw.
Fig. 5 (a), Fig. 5 (b), the explanation figure that Fig. 5 (c) is the Bearning mechanism for motor apparatus involved in the present invention.
Fig. 6 (a), Fig. 6 (b), Fig. 6 (c) are the axle for motor apparatus involved in the present invention observed from jacket side
Hold the stereogram of mechanism.
Fig. 7 (a), Fig. 7 (b) are the Bearning mechanism for motor apparatus involved in the present invention observed from framework side
Stereogram.
Fig. 8 is the explanation figure for showing to apply the variation of the radial bearing of the Bearning mechanism of the present invention.
(symbol description)
1 motor apparatus
2 worm screws
3 worm gears
6 frameworks
61st, 62 supporting board
610th, 620 slit
611st, the wall of 612,621,622 slits
615th, 625 bearing-surface
7 Bearning mechanisms
71st, 72 radial bearing
710th, 720 slit
711st, 721 portions
712nd, 722 flange part
713rd, the outer peripheral face of 723 flange parts
716th, the end face of 717,726,727 flange parts
8 compression helical springs
9 outer covers
910th, 920 groove
10 motors
Embodiment
Referring to the drawings, an example of the Bearning mechanism and motor apparatus to applying the present invention illustrates.
(overall structure)
Fig. 1 is the stereogram for applying the motor apparatus 1 of the present invention.Fig. 2 is to apply bowing for motor apparatus of the invention
View.
Motor apparatus 1 shown in Fig. 1 and Fig. 2 has motor 10, gear mechanism 14, slave unit (not shown) and frame
Frame 6, and make to be installed in slave unit or be connected to being shifted by movable member etc. for slave unit, wherein, the motor 10 is made
For driving source, the gear mechanism 14 transmits the rotation of motor 10, and the rotation of motor 10 is transferred to described by gear mechanism 14
Slave unit, the framework 6 are equiped with motor 10, gear mechanism 14 and slave unit etc..In the present embodiment, dot-dash is used
The outer cover 9 that line represents is connected to framework 6, and by the outer cover 9, by the grade of worm screw 2 covering for gear mechanism 14.
Gear mechanism 14 has worm screw 2 (rotary shaft) and worm gear 3, wherein, the rotation of motor 10 is transferred to the worm screw 2,
The worm gear 3 engages with worm screw 2.Worm screw 2 outer peripheral face 20 formed with helicla flute 21, worm gear 3 large-diameter portion 31 formed with
The teeth portion 36 engaged with the helicla flute 21 of worm screw 2.Worm gear 3 has the minor diameter part 32 with the same heart shaped of large-diameter portion 31, in minor diameter part 32
Outer peripheral face formed with teeth portion 37.In the axis hole 320 that minor diameter part 32 is embedded in formed with the fulcrum 65 for being holded up from framework 6, worm gear 3
It can be rotated centered on fulcrum 65.It is preferred that helical gear is used as worm gear 3.In addition, the terminal part in fulcrum 65 is fixed with
Packing ring 69, and prevent worm gear 3 from being come off from fulcrum 65 using packing ring 69.In the motor apparatus 1, if the rotation of motor 10 is borrowed
Worm screw 2 is helped to be delivered to worm gear 3, then worm gear 3 is rotated by CW clockwise or rotated by CCW counterclockwise centered on fulcrum 65.
(structure of motor 10)
Fig. 3 is the sectional view for showing the structure for applying the grade of motor 10 in motor apparatus 1 of the invention.In addition,
In the following description, it is prominent from motor body 110 with motor axis direction L (axis direction of worm screw 2), motor drive shaft 150
The side gone out is used as output phase as outlet side L1 using the side opposite from the side that motor body 110 protrudes with motor drive shaft 150
The L2 that tosses about is illustrated.
As shown in figure 3, motor 10 is stepper motor, and protruded with motor drive shaft 150 from columned motor body 110
Shape.Motor body 110 has cylindric stator 140, and the stator in the stator 140 with A phases exists with the stator of B phases
The structure to be overlapped on the L of motor axis direction.Therefore, in the stator 140, be wound with two of the ring-type of coil line 120 around
Coil holder 102 (the first bobbin winder bracket 102A and the second bobbin winder bracket 102B) overlaps on the L of motor axis direction, and it is described around
Being overlapped respectively at coil holder 102 has inner-stator iron core 103 and external stator core 104.More specifically, in the first coiling
Motor axis direction L both sides overlap the u-shaped shape of inner-stator iron core 103A and section that has ring-type in frame 102A
External stator core 104A, motor axis direction L both sides, which overlap, in the second bobbin winder bracket 102B the inner stator iron of ring-type
The external stator core 104B of the u-shaped shape of core 103B and section.The first bobbin winder bracket 102A's and the second bobbin winder bracket 102B
Inner peripheral surface, multiple pole teeth 141 of inner-stator iron core 103A, 103B multiple pole teeth 131 and external stator core 104A, 104B are in
The structure circumferentially arranged.Thus constitute the cylindric stator 140 with rotor configuration hole 130, and stator 140
Radially inner side be configured with rotor 105 in coaxial.In addition, in the present embodiment, external stator core 104A, 104B section
Be formed as U-shaped, external stator core 104,104B extend respectively into the radial outside of coil line 120 so as to form motor shell
Body.Also, it is formed with terminal board at bobbin winder bracket 102 (the first bobbin winder bracket 102A and the second bobbin winder bracket 102B) place and (does not scheme
Show), substrate 118 is connected to the terminal kept by the terminal board.
In rotor 105, motor drive shaft 150 extends along motor axis direction L.In motor drive shaft 150 by exporting opposite side L2
Position be connected with the bushing 156 of cylindrical shape, and bushing 156 outer peripheral face using bonding agent etc. be connected with it is cylindric forever
Magnet 159.In this state, the pole tooth 131,141 of the outer peripheral face of permanent magnet 159 and stator 140 is across defined interval pair
Put.
End plate 160 is fixed with the methods of outlet side L1 passes through welding relative to stator 140, at end plate 160 formed with
Hole for the embedded hole 166 of the bearing 170 (motor-side radial bearing) of the outlet side of motor drive shaft 150 and for installation frame 6
167.In the present embodiment, bearing 170 outer peripheral face formed with stage portion 171, pass through stage portion 171 and end plate 160
The face for exporting opposite side L2 abuts, and is moved to limit bearing 170 towards outlet side L1.
Around motor drive shaft 150, the packing ring 176 of annular shape is installed between bearing 170 and bushing 156.This
In the motor 10 of structure, the mobile range towards outlet side L1 of motor drive shaft 150 is provided by bearing 170.In addition, omit sometimes
Packing ring 176.
Plate portion 180 is fixed with the methods of the opposite side L2 of output passes through welding relative to stator 140, the shape at plate portion 180
Into the hole 186 for bearing 190 (motor-side radial bearing) insertion for having the opposite side L2 of output for motor drive shaft 150.In this embodiment party
In formula, bearing 190 outer peripheral face formed with stage portion 191, and pass through the side L2 opposite with the output of plate portion 180 of stage portion 191
Face abut, come limit bearing 190 towards outlet side L1 move.
Around motor 150, the packing ring 196,197 of annular shape is installed between bearing 190 and bushing 156, is located at
Export opposite side L2 packing ring 197 and the outlet side L1 of bearing 190 end contact.In the motor 10 of the structure, motor drive shaft
The mobile range that 150 direction exports opposite side L2 is provided by bearing 190.In addition, also can be using one piece of packing ring come instead of two
Piece packing ring 196,197.
(motor drive shaft 150 and the attachment structure of worm screw 2)
Fig. 4 (a), Fig. 4 (b) are in the motor apparatus 1 for applying the present invention observed from the outlet side L1 of motor 10
The explanation figure of the coupling part of motor 10 and worm screw 2, Fig. 4 (a) are motor 10 and the stereogram of the coupling part of worm screw 2, Fig. 4
(b) it 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 transmitted with worm screw 2 by shaft coupling 13
Mechanism) link together, shaft coupling 13 is formed as the two-layer configuration of first shaft coupling 11 and second shaft coupling 12.
In first shaft coupling 11, motor-side shaft coupling portion 4 (driving side shaft coupling portion) be connected to motor drive shaft 150 and horse
Up to the end 151 (terminal part) of the side opposite side of body 110, (the slave end of transferring element 5 combined with motor-side shaft coupling portion 4
Joint member) it is connected to the end 27 by the side of motor body 110 of worm screw 2.Therefore, motor drive shaft 150 and worm screw 2 are by motor
Side shaft coupling portion 4 and transferring element 5 link together.
Motor-side shaft coupling portion 4 has a convex portion 42 of round plate 41 and first, first convex portion 42 round plate 41 with
The end face of the opposite side of motor body 110 protrudes towards the side opposite with motor body 110.In motor-side shaft coupling portion 4
Axis hole 43 is centrally formed with, the end 151 of motor drive shaft 150 is embedded into axis hole 43.It is circumferential at the end 151 of motor drive shaft 150
A part be formed as tabular surface 152, and a circumferential part for the inner peripheral surface of axis hole 43 is formed as tabular surface (not shown), and
Overlapped each other by the tabular surface of the tabular surface 152 and axis hole 43 of motor drive shaft 150, to prevent motor-side shaft coupling portion 4 and motor
Axle 150 dallies.In addition, axis hole 43 penetrates the convex portion 42 of round plate 41 and first, the first convex portion 42 is by axis hole 43 and in length
It is divided into two the first convex portions 42 on direction.
Transferring element 5 is in generally a cylindrical shape, and is spread all over entirely in the end face by the side of motor body 110 of transferring element 5
It is formed radially the first recess 51 of the channel-shaped of the first convex portion 42 insertion for motor-side shaft coupling portion 4.
In the first shaft coupling 11 so formed, the first recess 51 spreads all over whole radial direction and extended, two the first convex portions
42 are embedded into the both ends of the first recess 51.Therefore, the loss when rotation in motor-side shaft coupling portion 4 is passed to transferring element 5
It is small.Also, the orientation of the bearing of trend of the first recess 51 and two the first convex portions 42 is and the L-orthogonal of motor axis direction
First direction L51, motor-side shaft coupling portion 4 can relatively move on L51 in a first direction with transferring element 5.
When forming second shaft coupling 12, in the end face with the side opposite side of motor body 110 of transferring element 5, two
Diametrically separated position is formed second recess 52, in the end 27 of worm screw 2 formed with the snail being embedded into the second recess 52
Bar side shaft coupling portion 26.Second shaft coupling 12 is formed by second recess 52 and the worm screw side shaft coupling portion 26.Here, snail
Bar side shaft coupling portion 26 is made up of two the second convex portions 28, and described two second convex portions 28 are in worm screw 2 by motor body 110
Protruded in end face 292 from the diametrically separated end face by the side of worm screw 2 for being positioned against transferring element 5, two the second convex portions
28 are respectively embedded in two the second recesses 52.
In the present embodiment, hole 23, the bullet are configured with the spring of the coaxial of worm screw 2 in being internally formed for worm screw 2
Spring configuration hole 23 is open in the end face 292 by the side of motor body 110.Therefore, in the end face 292 of worm screw 2 formed with matching somebody with somebody in spring
Put two the second convex portions 28 that two positions for being spaced 180 ° in the circumferential are configured at around the opening in hole 23.Therefore, will press
In the state of contracting helical spring 8 is configured in spring configuration hole 23, compression helical spring 8 is between two the second convex portions 28.
In the second shaft coupling 12 so formed, because two the second convex portions 28 are respectively embedded in two the second recesses 52
In, therefore the loss when rotation of transferring element 5 is passed to worm screw 2 is small.Also, the orientation of two the second recesses 52
(orientation of two the second convex portions 28) is and the L-orthogonal of motor axis direction and the second direction that intersects with first direction L51
L52。
Here, first direction L51 (orientation of the bearing of trend of the first recess 51 and two the first convex portions 42) with
Between second direction L52 (orientation of the bearing of trend of the second recess 52 and two the second convex portions 28) around the angle of axis
Spend direction and differ 90 °.Therefore, transferring element 5 relative to motor-side shaft coupling portion 4 movable direction (first direction L51) with
Transferring element 5 is orthogonal relative to the movable direction (second direction L52) in worm screw side shaft coupling portion 26.
In the motor apparatus 1 of the structure, if the motor drive shaft 150 of motor 10 rotates, motor in first shaft coupling 11
Side shaft coupling portion 4 rotates, and the rotation in motor-side shaft coupling portion 4 is transferred to transmission by the first convex portion 42 and the first recess 51
Part 5.Also, in second shaft coupling 12, the rotation of transferring element 5 is transferred to by the second recess 52 and the second convex portion 28
Worm screw 2.In the present embodiment, motor-side shaft coupling portion 4 is formed from a resin, and transferring element 5 is the elasticity being made up of rubber etc.
Part.Therefore, it is possible to sponge the vibration of motor drive shaft 150 when rotated by transferring element 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
There is the region 22,25 for being formed without helicla flute 21, snail in the motor axis direction L in the region formed with helicla flute 21 both sides
Bar 2 is supported as that can revolve in the region 22,25 for being formed without helicla flute 21 by radial bearing 71,72 (worm screw side radial bearing)
Turn.The detailed construction for employing the Bearning mechanism 7 of the radial bearing 71,72 will be described hereinafter.
Worm screw 2 is in hemisphere face with the end 291 of the opposite side of motor body 110, and the end 291 of the worm screw 2 is by protecting
The thrust bearing 73 for being held in the tabular of the groove 673 of framework 6 supports.
In the present embodiment, hole 23 is configured using the spring for being formed at worm screw 2 to configure compression helical spring 8 in worm screw
Between 2 and motor drive shaft 150, the compression helical spring 8 exerts a force worm screw 2 towards the side opposite with the side of motor body 110, and
Transferring element 5 is exerted a force towards motor-side shaft coupling portion 4.As a result, compression helical spring 8 is by transferring element 5 and horse
Motor drive shaft 150 is exerted a force towards the side of motor body 110 up to side shaft coupling portion 4.
More specifically, in the inside of worm screw 2, spring configuration hole 23 turns into from worm screw 2 by the side of motor body 110
End face 292 extends to the deep hole in position of the outer peripheral face formed with helicla flute 21, and matches somebody with somebody in the inside in spring configuration hole 23
It is equipped with compression helical spring 8.In this state, one end (side opposite with the side of motor body 110) of compression helical spring 8
The stage portion 231 of the inside with being formed at spring configuration hole 23 abuts, and the other end (motor body 110 of compression helical spring 8
Side) abutted with transferring element 5.Therefore, compression helical spring 8 is configured in transferring element 5 and worm screw 2 and the side phase of transferring element 5
Between the end of anti-side.
Therefore, compression helical spring 8 exerts a force worm screw 2 towards the side (outlet side L1) opposite with the side of motor body 110,
And motor drive shaft 150 (is exported towards the side of motor body 110 by shaft coupling 11 (transferring element 5 and motor-side shaft coupling portion 4)
Opposite side L2) force.
In the present embodiment, worm screw 2 is made up of resins such as POM (polyacetal resin), in the inside of worm screw 2, with spring
Configure the intercommunicating pore 24 that hole 23 connects and configure hole 23 in the side opposite with end face 292 along axis direction (horse relative to spring
Up to axis direction L) extension.Therefore, excessive thick wall part is not present at worm screw 2.Intercommunicating pore 24 configures the phase of hole 23 with spring
Together, be formed as with the coaxial of worm screw 2, and the internal diameter of intercommunicating pore 24 than spring configuration hole 23 internal diameter it is small.Therefore, configured in spring
In hole 23, the stage portion 231 for the coupling part being formed between intercommunicating pore 24 turns into circular step portion, the stage portion 231
(circular step portion) turns into the spring continuing surface with the end of the side opposite side of motor body 110 for accepting compression helical spring 8
230。
(detailed construction of Bearning mechanism 7)
Fig. 5 (a), Fig. 5 (b), Fig. 5 (c) are the explanation for the Bearning mechanism 7 in motor apparatus 1 involved in the present invention
Figure, Fig. 5 (a) are the stereogram of state for being covered worm screw 2 using outer cover 9, and Fig. 5 (b) is along worm screw 2 by Bearning mechanism 7
Sectional view when axis direction L is cut off, Fig. 5 (c) are when cutting off Bearning mechanism 7 on the direction of the axis vertical take-off with worm screw 2
Sectional view.Fig. 6 (a), Fig. 6 (b), Fig. 6 (c) are to be used for from what the side of outer cover 9 was observed in motor apparatus 1 involved in the present invention
Bearning mechanism 7 stereogram, Fig. 6 (a) be by outer cover 9 from framework 6 remove after state stereogram, Fig. 6 (b) is further
By worm screw 2 from framework 6 remove after state stereogram, Fig. 6 (c) be by radial bearing 71,72 from worm screw 2 remove after state
Stereogram.Fig. 7 (a), Fig. 7 (b) are the bearing being used in motor apparatus 1 involved in the present invention observed from the side of framework 6
The stereogram of mechanism 7, Fig. 7 (a) are the stereogram for the state that outer cover 9 covers worm screw 2, and Fig. 7 (b) is to remove outer cover 9 from worm screw 2
The stereogram of state afterwards.
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 of present embodiment
In device 1, worm screw 2 (rotary shaft) is configured between the base plate 60 of framework 6 and outer cover 9, so as to constitute utilize two to
Mandrel holds 71,72 Bearning mechanisms 7 for supporting worm screw 2 to rotate.
In the present embodiment, radial bearing 71,72 is configured at separated position on the axis direction of worm screw 2, but it
Structure it is identical.Specifically, radial bearing 71 has cylindric cylinder portion 711 and is radially oriented in the end in cylinder portion 711
The expanding flange part 712 in outside, radial bearing 72 have cylindric cylinder portion 721 and are radially oriented in the end in cylinder portion 721 outer
The expanding flange 722 in side, and radial bearing 71,72 is kept by the supporting board 61,62 of framework 6 respectively.
At radial bearing 71,72 from axis direction, flange part 712,722 is polygon.In the present embodiment,
At radial bearing 71,72 from axis direction, although flange part 712,722 corners are in bending, substantially four sides
Shape.In the present embodiment, radial bearing 71,72 is made up of resins such as PBT (PA polybutyleneterephthalate), radial bearing 71,
72 wall thickness is all roughly the same in all sites.
In addition, the structure of radial bearing 71,72 is identical, and keep structure and the guarantor of the supporting board 61 of radial bearing 71
The structure for holding the supporting board 62 of radial bearing 72 is identical.Therefore, in the following description, with radial bearing 71 and supporting board
Illustrated centered on 61 structure.
In the present embodiment, in the substantially semi-circular hole that supporting board 61 passes through formed with the end for worm screw 2
614, hole 614 is in open state in the side where outer cover 9.Here, opened in supporting board 61 formed with the inner peripheral surface in hole 614
The slit 610 of mouth.Slit 610 is formed to accommodate the depth of the flange part 712 of radial bearing 71, and the bottom of slit 610
Be formed as and 712 corresponding shape of the flange part of radial bearing 71.
Also, in the inner side of slit 610, two interval of opposed wall 611,612 and flange parts in the axial direction
712 thickness is equal or more slightly smaller than it.Therefore, if after radial bearing 71 is embedded into worm screw 2, by flange part 712
It is pressed 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 frame
The supporting board 61 of frame 6.In this state, two from the both sides of axis direction and flange part 712 of two walls 611,612
End face 716,717 is close to, and small gap g2 is there are between the inwall of slit 610 and the outer peripheral face 713 of flange part 712
(reference picture 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
It is narrower than the inwall of slit 610 and the gap g2 diametrically of flange part 712.
In the present embodiment, radial bearing 71 by state of the cylinder portion 711 towards radial bearing 72 to be fixed on support plate
Portion 61, being formed in the supporting board 61 of framework 6 has bearing-surface 615, and the bearing-surface 615 is in arc-shaped, and in radial bearing 72
Outer peripheral face of the side from radial outside supporting cylinder portion 711.Here, bearing-surface 615 is formed in the angular range below 180 °, such as
Formed in 120 ° to 180 ° of angular range.Therefore, bearing-surface 615 will not be when flange part 712 be pressed into slit 610
As obstruction.
Also, supporting board 62 is identical with supporting board 61, be also formed with the end for worm screw 2 pass through it is substantially semi-circular
Hole 624, the slit 620 formed with the opening at hole 624 at supporting board 62.Therefore, if radial bearing 72 is embedding
Between entering to worm screw 2 and then flange part 722 being pressed into two walls 621,622 of slit 620, then two walls 621,
622 are close to two end faces 726,727 of flange part 722, so as to which 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, being formed in supporting board 62 has bearing-surface
625, the bearing-surface 625 is in arc-shaped, and the outer peripheral face in the side of radial bearing 71 from radial outside supporting cylinder portion 721.Here,
Bearing-surface 625 is formed in the angular range below 180 °, such as is formed in 120 ° to 180 ° of angular range.Therefore, prop up
Bearing surface 625 will not turn into when flange part 722 is pressed into slit 620 to be hindered.
(anticreep of radial bearing 71,72)
In the motor apparatus 1 of present embodiment, formed with the cylindrical portion 68 for stationary housings 9 at framework 6.Cause
This, can if be fastened to screw 99 in cylindrical portion 68 through outer cover 9 in the state of outer cover 9 is covered to framework 6
Outer cover 9 is installed to framework 6.In this state, in the flange part 712,722 of outer cover 9 and radial bearing 71,72 from slit
610th, the 620 part contact exposed, so as to prevent flange part 712,722 to be come off from slit 610,620.
In the present embodiment, outer cover 9 has the flat part 90 of rectangle and from flat part 90 towards the base plate 60 of framework 6
What the projection 91,92,93 of prominent multiple ribbed, projection 93 and reference picture 2 in the projection 91,92,93 etc. illustrated
The thrust bearing 73 of tabular abuts, so as to prevent thrust bearing 73 to be come off from the groove 673 of framework 6.
Also, projection 91 is formed as long round shape, and forms groove in the region overlapping with the flange part 712 of radial bearing 71
910, projection 92 is formed as long round shape, and forms groove 920 in the region overlapping with the flange part 722 of radial bearing 72.
Therefore, as shown in Fig. 6 (b), in the state of radial bearing 71,72 is fixed into framework 6, due to radial bearing
71st, a part for 72 flange part 712,722 protrudes from supporting board 61,62 towards the side of outer cover 9, so if centripetal to cover
The mode of bearing 71,72 come if installing outer cover 9, then in flange part 712,722 from the part that supporting board 61,62 protrudes
A part is contained in the groove 910,920 of outer cover 9.
Here, the depth (the protrusion size of projection 91,92) of groove 910,920 than radial bearing 71,72 flange part 712,
The height of 722 part for protruding from supporting board 61,62 is big.Therefore, as shown in Fig. 5 (b), the bottom of groove 910 with it is centripetal
Gap g3 is there are between the outer peripheral face 713 of the flange part 712 of bearing 71, but projection 91 and the cylinder portion 711 of radial bearing 71 support
Connect, so as to prevent radial bearing 71 to be come off from slit 610.Also, in the bottom of groove 920 and the flange part of radial bearing 72
Gap g3 is there are between 722 outer peripheral face 723, but projection 92 abuts with the cylinder portion 721 of radial bearing 72, so as to prevent to
Mandrel is held 72 and come off from slit 620.Also, the width of groove 910,920 is bigger than the thickness of flange part 712,722.Therefore, groove 910
Inwall do not contacted with the end face 716,717 of flange part 712, the inwall of groove 920 does not connect with the end face 726,727 of flange part 722
Touch.
(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 snail
Bar 2 (rotary shaft) supporting is the cylinder portion 711 that can be rotated and is radially oriented the expanding flange part 712 in outside from cylinder portion 711, centripetal
Bearing 72 has by worm screw 2 (rotary shaft) supporting for the cylinder portion 721 that can rotate and to be radially oriented outside from cylinder portion 721 expanding
Flange part 722, radial bearing 71,72 are housed inside the slit 610,620 of framework 6 to be protected by framework 6 by flange part 712,722
Hold.Therefore, when radial bearing 71,72 is kept by framework 6, because stress is not easy to be applied to a portion 711,721, therefore cylinder portion
711st, 721 it is not likely to produce deformation.Therefore, the out of roundness in cylinder portion 711,721 or cylinder portion 711,721 and the gap of rotary shaft are not easy
Change, therefore bearing performance is not easy to reduce.
Also, because radial bearing 71,72 is formed from a resin, therefore radial bearing 71,72 can be manufactured at low cost, and
And lightweight can be realized.Even if in this case, because when radial bearing 71,72 is kept by framework 6, stress is not easy to apply
It is added at a portion 711,721, therefore even if radial bearing 71,72 is formed from a resin, cylinder portion 711,721 is not easy to deform.
Also, flange part 712 is pressed between two walls 611,612 of slit 610, and flange part 722 is pressed into
Between two walls 621,622 of slit 620.Therefore, the power of radial direction is not easy to be applied to a portion 711,721, therefore cylinder portion 711,
721 are not likely to produce radial deformation.Also, because flange part 712,722 is polygon when from axis direction, therefore flange
Portion 712,722 plays the function of preventing that radial bearing 71,72 from rotating.Moreover, when from axis direction, flange part 712,
722 be quadrangle.Therefore, the length of a line of flange part 712,722 is longer, therefore has good anti-rotating function.Also,
It is different from the situation that flange part 712,722 is triangle etc., because opposite side is parallel, therefore there is good anti-rotation work(
Energy.Also, because framework 6 has in angular range below 180 ° from the branch of the outer peripheral face in radial support cylinder portion 711,721
Bearing surface 615,625, therefore diametrically can reliably support worm screw 2 by cylinder portion 711,721.
Moreover, the outer cover 9 overlapping with framework 6 in flange part 712,722 from the part that slit 610,620 exposes with connecing
Touch.Therefore, it is possible to prevent flange part 712,722 from being come off from slit 610,620.Also, formed with groove 910,920 at outer cover 9,
The groove 910,920 accommodates at least a portion from the part that slit 610,620 protrudes in flange part 712,722.Accordingly, it is capable to
Flange part 712,722 is enough remained by correct posture by the slit 610,620 of framework 6 and the groove 910,920 of outer cover 9.And
And the inwall of groove 910 contacts with the end face 716,717 of flange part 712, and the periphery of the inwall and flange part 712 in groove 910
Gap is there are between face 713.Equally, the inwall of groove 920 contacts with the end face 726,727 of flange part 722, and in groove 920
Inwall and flange part 722 outer peripheral face 723 between there are gap.Therefore, the power of radial direction be not easy to be applied to a portion 711,
721, therefore cylinder portion 711,721 is not likely to produce radial deformation.
Moreover, two radial bearings 71,72 respectively by by cylinder portion 711,721 towards another radial bearing side in a manner of quilt
Framework 6 is kept.Therefore, because the position of holding flange portion 712,722 farther out, therefore can be with two radial bearings 71,72
Stable state keeps worm screw 2.
(variation of radial bearing 71)
Fig. 8 is the explanation figure for showing to apply the variation of the radial bearing 71 of the Bearning mechanism 7 of the present invention.In above-mentioned reality
Apply in mode, radial bearing 71 only has cylinder portion 711 in the side of flange part 712, but as shown in figure 8, can also use relative
There is the structure in cylinder portion 711 in the both sides of axis direction in flange part 712.According to the structure, due to entering to worm screw 2 (rotary shaft)
The size length of the axis direction of the bearing-surface (inner peripheral surface in cylinder portion 711) of row supporting, therefore snail can be kept with stable state
Bar 2.In addition, radial bearing 72 is same.
(other embodiment)
In the above-described embodiment, rotary shaft is worm screw 2, but can also be applied the present invention to being provided with horizontal gear etc.
The Bearning mechanism 7 that is supported of rotary shaft.
Also, in the above-described embodiment, using stepper motor as motor 10, but can also be used other brushless motors or
Brush motor etc..
Claims (14)
1. a kind of Bearning mechanism, it is characterised in that the Bearning mechanism includes：
Rotary shaft；
Radial bearing, it is the cylinder portion that can rotate and from cartridge direction that the radial bearing, which has the rotation e axle supporting,
The expanding flange part of radial outside；And
Framework, the framework have slit, and the flange part is contained in inner side by the slit, so as to keep described to mandrel
Hold,
The inwall of the slit and the inwall of slit described in the gap-ratio in the axial direction of the flange part and the flange
The gap diametrically in portion is narrow,
The framework has in angular range below 180 ° from the bearing-surface of the outer peripheral face of radial support cartridge.
2. Bearning mechanism according to claim 1, it is characterised in that
The radial bearing is formed from a resin.
3. Bearning mechanism according to claim 1, it is characterised in that
The flange part is pressed between opposed in the axial direction two wall in the slit.
4. Bearning mechanism according to claim 1, it is characterised in that
When from axis direction, the flange part is polygon.
5. Bearning mechanism according to claim 4, it is characterised in that
When from axis direction, the flange part is quadrangle.
6. the Bearning mechanism according to any one of claim 1 to 5, it is characterised in that
The outer cover overlapping with the framework contacts with the flange part from the part that the slit exposes.
7. Bearning mechanism according to claim 6, it is characterised in that
A circumferential part for the flange part protrudes from the slit,
Formed with groove at the outer cover, the groove accommodate in the flange part from least the one of the part that the slit protrudes
Part.
8. Bearning mechanism according to claim 7, it is characterised in that
The end contact positioned at axis direction of the inwall of the groove and the flange part, and the groove inwall with it is described convex
Gap is there are between the outer peripheral face of edge.
9. the Bearning mechanism according to any one of claim 1 to 5, it is characterised in that
The radial bearing is configured at two separated in the axial direction positions,
Be arranged at described two positions the radial bearing respectively so that cartridge towards another radial bearing side side
Formula is kept by the framework.
10. the Bearning mechanism according to any one of claim 1 to 5, it is characterised in that
The radial bearing has cartridge relative to the both sides of the flange part in the axial direction.
11. the Bearning mechanism according to any one of claim 1 to 5, it is characterised in that
The rotary shaft is worm screw.
12. the Bearning mechanism according to any one of claims 1 to 3, it is characterised in that
When from axis direction, the flange part is polygon.
13. Bearning mechanism according to claim 12, it is characterised in that
When from axis direction, the flange part is quadrangle.
A kind of 14. motor apparatus, it is characterised in that
The motor apparatus has the Bearning mechanism described in any one of claim 1 to 13, and the motor apparatus has
Drive the motor of the rotary shaft rotation.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2014073749A JP6353258B2 (en) | 2014-03-31 | 2014-03-31 | Bearing mechanism and motor device |
| JP2014-073749 | 2014-03-31 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104953750A CN104953750A (en) | 2015-09-30 |
| CN104953750B true CN104953750B (en) | 2018-01-05 |
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 After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520180486.1U Withdrawn - After Issue CN204465223U (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) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| 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 |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1655423A (en) * | 2004-02-13 | 2005-08-17 | 三星电机株式会社 | Bar type vibration motor |
| CN101026319A (en) * | 2006-02-22 | 2007-08-29 | 日本电产株式会社 | Spindle motor |
| CN102530057A (en) * | 2010-11-09 | 2012-07-04 | 株式会社捷太格特 | Electric power steering system |
Family Cites Families (5)
| 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 |
| 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 |
| 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
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1655423A (en) * | 2004-02-13 | 2005-08-17 | 三星电机株式会社 | Bar type vibration motor |
| CN101026319A (en) * | 2006-02-22 | 2007-08-29 | 日本电产株式会社 | Spindle motor |
| CN102530057A (en) * | 2010-11-09 | 2012-07-04 | 株式会社捷太格特 | Electric power steering system |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2015151891A1 (en) | 2015-10-08 |
| JP2015197112A (en) | 2015-11-09 |
| CN104953750A (en) | 2015-09-30 |
| JP6353258B2 (en) | 2018-07-04 |
| CN204465223U (en) | 2015-07-08 |
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