CN107800234B - Motor and movable platen thereof - Google Patents
Motor and movable platen thereof Download PDFInfo
- Publication number
- CN107800234B CN107800234B CN201610834547.0A CN201610834547A CN107800234B CN 107800234 B CN107800234 B CN 107800234B CN 201610834547 A CN201610834547 A CN 201610834547A CN 107800234 B CN107800234 B CN 107800234B
- Authority
- CN
- China
- Prior art keywords
- dynamic pressure
- plate
- motor
- pressure plate
- ditch
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims description 38
- 230000002093 peripheral effect Effects 0.000 claims description 20
- 238000005461 lubrication Methods 0.000 claims description 14
- 238000007789 sealing Methods 0.000 claims description 7
- 238000005530 etching Methods 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 6
- 239000007769 metal material Substances 0.000 claims description 5
- 238000005323 electroforming Methods 0.000 claims description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 3
- 230000001186 cumulative effect Effects 0.000 claims description 3
- 239000000741 silica gel Substances 0.000 claims description 3
- 229910002027 silica gel Inorganic materials 0.000 claims description 3
- 239000012530 fluid Substances 0.000 description 25
- 230000000694 effects Effects 0.000 description 17
- 230000001050 lubricating effect Effects 0.000 description 13
- 238000010586 diagram Methods 0.000 description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical group [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 3
- 239000002131 composite material Substances 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000011889 copper foil Substances 0.000 description 2
- 238000000354 decomposition reaction Methods 0.000 description 2
- 229910000679 solder Inorganic materials 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000003486 chemical etching Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000010329 laser etching Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/16—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields
- H02K5/165—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields radially supporting the rotor around a fixed spindle; radially supporting the rotor directly
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Sliding-Contact Bearings (AREA)
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
Abstract
A motor and a movable platen thereof are used for solving the problem that a shaft of the existing motor cannot rotate smoothly. The motor includes: the base is provided with a bearing sleeve, and a bearing is arranged in the bearing sleeve; the rotor comprises a rotating shaft and a thrust plate, the rotating shaft is combined on the bearing, and the thrust plate is arranged at one end of the rotating shaft; and the movable pressing plate is arranged on one side of the bearing sleeve and faces the thrust plate, the thrust plate is positioned between the bearing and the movable pressing plate, and one surface of the movable pressing plate, which faces the thrust plate, is provided with a plurality of movable pressing grooves.
Description
Technical field
The present invention relates to field of motors more particularly to a kind of motors equipped with dynamic pressure plate.
Background technique
It please refers to shown in Fig. 1, is a kind of existing motor 9, including a sleeve 91 and an axis 92.The axis 92 protrudes into this
In sleeve 91, and a radial bearing portion is constituted between the axis 92 and the sleeve 91.Whereby, which is capable of forming rotatably
It is incorporated into the sleeve 91, pivots the axis 92 when being driven with respect to the sleeve 91.The one of the similar existing motor 9
A embodiment is public in the Patent Case of No. 1249887 " spindle drive motor and its assemble method " in Chinese patent notification number
It opens.
Wherein, the side of the sleeve 91 is equipped with an axial thrust plate 911, and one end of the axis 92 combines a thrust plate
921, the axial thrust plate 911 and the thrust plate 921 constitute the axial thrust bearing portion in axial direction supporting the axis 92.Specifically
It, and lubricating fluid (such as: oil) it can be filled between the axial thrust plate 911 and the thrust plate 921, make the axial thrust plate
911 keep a spacing with the thrust plate 921, to reduce the friction torque of the axis 92.However, the axial thrust plate 911 with should
The opposite surface of thrust plate 921 is plane, when the axis 92 bears pressure or generates vibration during rotation, the axial direction
Layer of lubrication fluid thickness between thrust plate 911 and the thrust plate 921 will be thinning, in addition generate the axial thrust plate 911 with
The situation that the thrust plate 921 directly contacts.Accordingly, the friction torque of the axis 92 reduces limited extent.
In view of this, existing motor 9 there are problems that axis 92 can not smooth rotation, still have the necessity improved.
Summary of the invention
To solve the above problems, the present invention provides a kind of motor and its dynamic pressure plate, the surface of the dynamic pressure plate is equipped with multiple dynamic
Ditch is pressed, to increase the effective thickness and support force of the layer of lubrication fluid between the dynamic pressure plate and a thrust plate.
To reach aforementioned invention purpose, the present invention with technical solution include:
A kind of motor a, comprising: pedestal is equipped with a bearing holder (housing, cover), is equipped with a bearing inside the bearing holder (housing, cover)；One rotor, should
Rotor includes a shaft and a thrust plate, which is incorporated into the bearing, which is set to one end of the shaft；And one
Dynamic pressure plate, which is set to the side of the bearing holder (housing, cover), and the dynamic pressure plate, towards the thrust plate, which is located at the bearing
Between the dynamic pressure plate, which is equipped with multiple dynamic pressure ditches towards a surface of the thrust plate.
Wherein, which is equipped with a hole slot.Whereby, it is formed between the dynamic pressure plate and the bearing for accommodating lubrication flow
One accommodating space of body, the hole slot are connected to the accommodating space, and the hole slot is made to can be used as a lubricating fluid reserve tank.
Wherein, one end and the hole slot equipped with the thrust plate of the shaft are adjacent.Whereby, the profit which is accommodated
Slip-stream body can also lubricate one end of the shaft other than it can lubricate the thrust plate simultaneously.
Wherein, which includes an Internal periphery and an outer profile towards the surface of the thrust plate, which covers this
Hole slot, the outer profile cover the Internal periphery, and the outer peripheral edge of the outer profile and the dynamic pressure plate has a spacing, the Internal periphery with
A region is constituted between the outer profile, each dynamic pressure ditch is set in the region.Whereby, each dynamic pressure ditch is not connected to the hole slot or should
The outer peripheral edge of dynamic pressure plate.
Wherein, which has an outer peripheral edge, axis of the outer peripheral edge in the shaft towards a bottom surface of the dynamic pressure plate
Cover the outer profile upwards, so as to making each dynamic pressure ditch radially not extend beyond the thrust plate along the shaft.
Wherein, which has an inner peripheral, axis of the Internal periphery in the shaft towards a bottom surface of the dynamic pressure plate
Cover the inner peripheral upwards, so as to making each dynamic pressure ditch not extend beyond the thrust plate along the radial inward of the shaft.
Wherein, there are two lateral margins for each dynamic pressure ditch tool, and centered on the hole slot, the part of an at least lateral margin for each dynamic pressure ditch
Section is completely formed a helical, and the helical is equiangular spiral.By make each dynamic pressure ditch at least one lateral margin formed helical,
Can its friction torque effectively be reduced when the shaft rotates.
Wherein, each dynamic pressure ditch tool is there are two lateral margin, and each dynamic pressure ditch includes a first end and a second end, this two
A lateral margin is separately connected the first end and the second end, which is located at the Internal periphery, which is located at should
Outer profile.Whereby, each dynamic pressure ditch extends to the outer profile by the Internal periphery.
Wherein, it at least partial sector of a lateral margin of each dynamic pressure ditch or is completely formed by the first end towards the second end
The involute gradually stretched.It, can be effectively when the shaft rotates by making an at least lateral margin for each dynamic pressure ditch form involute
Reduce its friction torque.
Wherein, the spacing of two lateral margins is cumulative towards the second end by the first end, enables the width of each dynamic pressure ditch
The enough radially formation along the shaft is cumulative, enable layer of lubrication fluid between the dynamic pressure plate and the thrust plate uniformly by
Power.
Wherein, the Internal periphery and the outer profile are respectively using the dynamic pressure plate center as the circle in the center of circle.Whereby, each dynamic pressure ditch
First end and the second end be located on the Internal periphery and outer profile to form concentric circles respectively.
Wherein, it is in the dynamic pressure plate which, which includes the boundary profile boundary profile towards the surface of the thrust plate,
The heart is the circle in the center of circle, which is located between the Internal periphery and the outer profile, between the Internal periphery and the boundary profile
A first area is constituted, a second area is constituted between the boundary profile and the outer profile, and centered on the hole slot, respectively
Section of at least one lateral margin of dynamic pressure ditch in the first area forms an equiangular spiral, at least one lateral margin this
Section in two regions forms an involute.It, can be effective by making at least one lateral margin of each dynamic pressure ditch form above-mentioned shape
Its friction torque is reduced in shaft rotation.
Wherein, which has a first radius r with respect to the dynamic pressure plate centeri, the outer profile is with respect to the dynamic pressure plate
Center has a second radius ro, a third radius r of the boundary profile with respect to the dynamic pressure plate centermIt can be expressed as follows
Shown in formula:
rm=ri+(ro-ri)/K
Wherein, 1 < K < 1.5, the range so as to ensuring the first area is sufficiently large, makes at least one lateral margin of each dynamic pressure ditch
The section long enough for forming equiangular spiral can suitably distribute at least one lateral margin and form the section of equiangular spiral and be formed gradually
The ratio of the section of line is stretched, to promote the effect for the friction torque for reducing the shaft.
Wherein, the angle of the equiangular spiral is 25 °~35 °, and the involute is in the tangent line of the endpoint of the outer profile
Angle is 11 °~13 °, so as to keeping the effect for the friction torque for reducing the shaft more significant.
Wherein, the quantity of multiple dynamic pressure ditch is 12~20, and is preferably 16, so as to making to reduce rubbing for the shaft
The effect for wiping torque is more significant.
Wherein, depth of each dynamic pressure ditch in the axial direction of the shaft is 20~30 μm, and preferably 24~26 μm, so as to making
The effect for reducing the friction torque of the shaft is more significant.
Wherein, a locating piece can be equipped with inside the bearing holder (housing, cover), which is incorporated into the internal perisporium of the bearing holder (housing, cover), and
The locating piece abuts the bearing, is positioned at the bearing holder (housing, cover) so as to supporting the bearing, and then by the bearing.
Wherein, the surface of the side of the thrust plate and the dynamic pressure plate keeps a spacing, the other side of the thrust plate with should
Bearing or the locating piece keep a spacing, so as to enabling shaft freedom to pivot in the clear.
Wherein, the thrust plate and the shaft are via laser solder bond, so as to promoting the combination of the shaft and the thrust plate
Intensity.
Wherein, which includes the plate and pedestal be combineding with each other, and the dynamic pressure plate is towards the surface of the thrust plate
Positioned at the plate, the hardness of the pedestal is greater than the hardness of the plate.Whereby, multiple by being opened up on the lesser plate of hardness
Dynamic pressure ditch can reduce the difficulty of processing of multiple dynamic pressure ditch, and the biggish pedestal of hardness still is able to maintain the dynamic pressure plate
Enough rigidity.
Wherein, the surface of the plate is to etch or the multiple dynamic pressure ditch of electrotyping process.Whereby, the processing of multiple dynamic pressure ditch
Difficulty can be effectively reduced, and promote the forming accuracy of the dynamic pressure ditch.
Wherein, which is set on a bottom cover, and a sealing ring is set between the dynamic pressure plate and the bottom cover；It should
Sealing ring can be made of rubber or silica gel.Whereby, it can avoid the lubricating fluid in the accommodating space to leak out to the dynamic pressure plate and be somebody's turn to do
Between bottom cover.
A kind of dynamic pressure plate of motor a, comprising: plate, a surface of the plate are equipped with to etch or electrotyping process
Multiple dynamic pressure ditches；And a pedestal, the hardness of the pedestal are greater than the hardness of the plate, which combines backwards to the side on the surface
In the pedestal.Whereby, the dynamic pressure plate can reach the difficulty of processing for reducing multiple dynamic pressure ditch and maintain the dynamic pressure plate rigidity
Effect.
Wherein, which is equipped with a hole slot.Whereby, since the hardness of the plate is smaller, adding for the hole slot can be made
Work difficulty is effectively reduced.
Wherein, which is a flexible circuit board.Whereby, the surface of the plate can pass through the modes such as etching or electroforming
Shape multiple dynamic pressure ditch.
Wherein, which is plate body made of metal material.Whereby, the hardness of the pedestal will be hard much larger than the plate
Degree, enables the pedestal effectively to maintain the rigidity of the dynamic pressure plate.
Wherein, the quantity of multiple dynamic pressure ditch is 12~20, and preferably 16, so as to making to reduce rubbing for a shaft
The effect for wiping torque is more significant.
Wherein, depth of each dynamic pressure ditch in an axial direction is 20~30 μm, and preferably 24~26 μm, this it is axially vertical should
Surface, it is more significant so as to making to reduce the effect of friction torque of a shaft.
By above structure, the motor and its dynamic pressure plate of various embodiments of the present invention are equipped with more by means of the surface of the dynamic pressure plate
A dynamic pressure ditch is filled in lubricating fluid in each dynamic pressure ditch, can increase the lubricating fluid between the dynamic pressure plate and the thrust plate
The effective thickness and support force of layer have effects that reduce the friction torque of the shaft.
Detailed description of the invention
A kind of Fig. 1: cross-sectional view of existing motor；
Fig. 2: the composite structure schematic cross-sectional view of the first embodiment of the present invention；
Fig. 3: the three-dimensional appearance schematic diagram of the dynamic pressure plate of the first embodiment of the present invention；
Fig. 4: the upper schematic diagram of the dynamic pressure plate of the first embodiment of the present invention；
Fig. 5: the section of the dynamic pressure ditch formation involute of the first embodiment of the present invention is in the angle of contingence of the endpoint of outer profile
The relational graph of degree and the friction torque of shaft；
Fig. 6: the relational graph of the friction torque of the dynamic pressure ditch quantity and shaft of the first embodiment of the present invention；
Fig. 7: the relational graph of the friction torque of the dynamic pressure trench depth and shaft of the first embodiment of the present invention；
Fig. 8: the locating piece of the pedestal of the embodiment of the present invention is placed in the composite structure schematic cross-sectional view on the outside of the bearing；
Fig. 9: the structural decomposition diagram of the dynamic pressure plate of the first embodiment of the present invention；
Figure 10: the composite structure schematic cross-sectional view of the second embodiment of the present invention；
Figure 11: the structural decomposition diagram of the dynamic pressure plate of the second embodiment of the present invention.Description of symbols
(present invention)
1 pedestal
11 bearing holder (housing, cover)s 111 opening
112 bottom cover, 12 bearing
13 locating piece, 14 sealing ring
2 rotors
21 shaft, 22 thrust plate
221 outer peripheral edge, 222 inner peripheral
3 dynamic pressure plates
3a plate 3b pedestal
31 surface, 32 dynamic pressure ditch
321 lateral margin, 322 first end
323 the second end, 33 hole slot
34 outer peripheral edge, 341 recess portion
35 grooves
S accommodating space
C1 Internal periphery C2 outer profile
C3 boundary profile
The region the R first area R1
R2 second area
1 angle, θ of θ, 2 angle
(prior art)
9 motors
91 sleeve, 911 axial thrust plate
92 axis, 921 thrust plate
Specific embodiment
It is hereafter special according to the present invention to enable above and other objects, features and advantages of the invention to be clearer and more comprehensible
Preferred embodiment, and cooperate attached drawing, it is described in detail below:
It is the motor of the first embodiment of the present invention, including 1, rotor 2 and one of a pedestal shown in referring to figure 2.
A dynamic pressure plate 3.The rotor 2 is rotatably engaged on the pedestal 1, which is set on the pedestal 1.
The pedestal 1 includes a bearing holder (housing, cover) 11, and 11 periphery of bearing holder (housing, cover) is for structures such as combination shell, iron core or circuit boards
Part.The bearing holder (housing, cover) 11 is equipped with an opening 111.A bearing 12 is equipped with inside the bearing holder (housing, cover) 11.In the present embodiment, the bearing
12 can be hydrodynamic bearing, and still, which can also be bearing (such as: the copper bearing) construction of other patterns, and the present invention is simultaneously
It is not limited.A locating piece 13 is also provided with inside the bearing holder (housing, cover) 11, which can be a ring body or more
A block, which can be incorporated into the internal perisporium of the bearing holder (housing, cover) 11, and the locating piece 13 abuts the bearing 12, for branch
The bearing 12 is supportted, and then the bearing 12 is positioned in the bearing holder (housing, cover) 11.But the bearing 12 can also by tight fit or with this
Bearing holder (housing, cover) 11 modes such as is wholely set and is positioned in the bearing holder (housing, cover) 11, therefore the present invention is not limited thereto.
The rotor 2 includes a shaft 21 and a thrust plate 22, which can protrude into the bearing by the opening 111
In set 11, and the shaft 21 is incorporated into the bearing 12, so that the shaft 21 is rotated relative to the bearing holder (housing, cover) 11, therefore the rotor
2 are rotatably engaged on the pedestal 1.The thrust plate 22 is set to one end of the shaft 21.Wherein, the shaft 21 and the thrust
Plate 22 can be made of metal material, allow the shaft 21 and the thrust plate 22 by laser solder bond, to promote this turn
The bond strength of axis 21 and the thrust plate 22.
The dynamic pressure plate 3 is set to the side of the bearing holder (housing, cover) 11 far from the opening 111, between the dynamic pressure plate 3 and the bearing 12
An accommodating space S is formed, the thrust plate 22 of the rotor 2 is set in accommodating space S, and the thrust plate 22 is made to be formed in the axis
It holds between 12 and the dynamic pressure plate 3, and the dynamic pressure plate 3 is towards the thrust plate 22 of the rotor 2.The dynamic pressure plate 3 is towards the thrust plate 22
A surface 31 be equipped with multiple dynamic pressure ditches 32.
By above structure, the motor of the first embodiment of the present invention in actual use, the dynamic pressure plate 3 and the bearing 12 it
Between accommodating space S for accommodating lubricating fluid (such as: oil), make to be capable of forming one between the dynamic pressure plate 3 and the thrust plate 22
A layer of lubrication fluid (such as: oil film), therefore the dynamic pressure plate 3 and the thrust plate 22 is made to be able to maintain a spacing, with reduce should
The friction torque of shaft 21.Since the surface 31 of the dynamic pressure plate 3 is equipped with multiple dynamic pressure ditches 32, the lubricating fluid will be filled
In each dynamic pressure ditch 32, to increase the effective thickness and support force of the layer of lubrication fluid.Whereby, when the shaft 21 bear pressure or
It is that when generating vibration during rotation, can effectively avoid the layer of lubrication fluid thinning, to prevent the dynamic pressure plate 3 and the thrust
Plate 22 directly contacts, therefore the motor of the first embodiment can further decrease the friction torque of the shaft 21.
According to aforementioned structure, the characteristics of enumerating the motor of various embodiments of the present invention in detailed below, is simultaneously explained one by one:
Referring to figure 2. and shown in Fig. 3, which is equipped with a hole slot 33, which is connected to the accommodating space
S makes the hole slot 33 can be used as a lubricating fluid reserve tank.One end that the shaft 21 is equipped with the thrust plate 22 can be with the hole slot 33
Adjacent, whereby, the lubricating fluid that accommodating space S is accommodated can also lubricate simultaneously other than it can lubricate the thrust plate 22
One end of the shaft 21.
Referring to figure 3. and shown in Fig. 4, which includes an an Internal periphery C1 and outer profile C2, Internal periphery C1
Cover the hole slot 33, outer profile C2 covers Internal periphery C1, and the outer peripheral edge of outer profile C2 and the dynamic pressure plate 3 has one
Spacing, constitutes a region R between Internal periphery C1 and outer profile C2, each dynamic pressure ditch 32 is set in the R of the region.Whereby,
Each dynamic pressure ditch 32 is not connected to the hole slot 33 or the outer peripheral edge of the dynamic pressure plate 3.Wherein, please with reference to shown in Fig. 2, the thrust plate 22
There is an outer peripheral edge 221 and an inner peripheral 222 towards a bottom surface of the dynamic pressure plate 3, which can be in this turn
Cover outer profile C2 in the axial direction of axis 21, each dynamic pressure ditch 32 is made radially not extend beyond the thrust along the shaft 21
Plate 22；Relatively, Internal periphery C1 can cover the inner peripheral 222 in the axial direction of the shaft 21, make each dynamic pressure ditch 32 will not
The thrust plate 22 is extended beyond along the radial inward of the shaft 21.In other words, each dynamic pressure ditch 32 can be in the axial direction of the shaft 21
It is upper to be located in the range of the thrust plate 22, enable multiple dynamic pressure ditch 32 avoid really the dynamic pressure plate 3 and the thrust plate 22 it
Between layer of lubrication fluid it is thinning, to prevent the dynamic pressure plate 3 from directly contacting with the thrust plate 22.
Referring to figure 3. and shown in Fig. 4, there are two lateral margins 321 for each tool of dynamic pressure ditch 32, and centered on the hole slot 33, each dynamic
It presses the partial sector of at least one lateral margin 321 of ditch 32 or is completely formed a helical or an involute.In detail, each dynamic pressure
Ditch 32 include a first end 322 and a second end 323, two lateral margins 321 be separately connected the first end 322 and
The second end 323, the first end 322 are located in Internal periphery C1, which is located in outer profile C2, make
Each dynamic pressure ditch 32 extends to outer profile C2 by Internal periphery C1.In the present embodiment, Internal periphery C1 and outer profile C2 points
Wei not be using 3 center of dynamic pressure plate as the circle in the center of circle, therefore the first end 322 of each dynamic pressure ditch 32 and the second end 323 are distinguished
On the Internal periphery C1 and outer profile C2 for forming concentric circles.The partial sector of at least one lateral margin 321 of each dynamic pressure ditch 32 or
An equiangular spiral being completely formed centered on the hole slot 33；Or it is formed by the first end 322 towards the second end 323
The involute gradually stretched.In addition, the spacing of two lateral margins 321 can by the first end 322 towards the second end 323 gradually
Increase, enables the layer of lubrication fluid uniform stressed between the dynamic pressure plate 3 and the thrust plate 22.
In the present embodiment, which includes a boundary profile C3, the boundary wheel towards the surface of the thrust plate 31
Wide C3 is similarly using 3 center of the dynamic pressure plate as the circle in the center of circle, and boundary profile C3 is located at Internal periphery C1 and outer profile C2
Between, which is divided into a first area R1 and one for the region R between Internal periphery C1 and outer profile C2
A second area R2.First area R1 is constituted between Internal periphery C1 and boundary profile C3, the boundary profile C3 is outer with this
Second area R2 is constituted between profile C2, and centered on the hole slot 33, at least one lateral margin 321 of each dynamic pressure ditch 32 is at this
Section in the R1 of first area forms an equiangular spiral, the section shape of at least one lateral margin 321 in second area R2
At an involute.In other words, a section of an at least lateral margin 321 for each dynamic pressure ditch 32 forms one centered on the hole slot 33
A equiangular spiral, and another section forms the involute gradually stretched by the first end 322 towards the second end 323.By
So that at least one lateral margin 321 of each dynamic pressure ditch 32 is formed above-mentioned shape, effectively can reduce its friction when the shaft 21 rotates
Torque.
In more detail, shown in referring to figure 3., Internal periphery C1 has a first radius r with respect to 3 center of dynamic pressure platei,
Outer profile C2 has a second radius r with respect to 3 center of dynamic pressure plateo, the boundary profile C3 is with respect to 3 center of dynamic pressure plate
One third radius rmIt can be expressed as follows shown in formula (1):
rm=ri+(ro-ri)/K (1)
Wherein, 1 < K < 1.5.
By the third radius r for making boundary profile C3mMeet above formula (1), it can be ensured that the range of first area R1
It is sufficiently large, so that at least one lateral margin 321 of each dynamic pressure ditch 32 is formed the section long enough of equiangular spiral, can suitably distribute this extremely
A few lateral margin 321 forms the section of equiangular spiral and the ratio for the section for forming involute, reduces the shaft 21 to be promoted
The effect of friction torque.
Wherein, in addition at least one lateral margin 321 of each dynamic pressure ditch 32 forms the section of equiangular spiral and forms involute
Outside the ratio of section, the shape of the equiangular spiral and involute, which also will affect multiple dynamic pressure ditch 32, reduces rubbing for the shaft 21
Wipe the effect of torque.Please with reference to shown in Fig. 5, the involute is 11 ° in the tangential angle θ 2 of the endpoint of outer profile C2
~13 °, and when the angle, θ 1 of the equiangular spiral is set as 25 °~35 °, the effect for reducing the friction torque of the shaft 21 is the most aobvious
It writes.
In addition, the quantity and depth of multiple dynamic pressure ditch 32 will will have a direct impact between the dynamic pressure plate 3 and the thrust plate 22
Layer of lubrication fluid thickness, therefore also will affect the effect that multiple dynamic pressure ditch 32 reduces the friction torque of the shaft 21.Please
Referring to shown in Fig. 6, when the quantity of multiple dynamic pressure ditch 32 is 16, the effect for reducing the friction torque of the shaft 21 is the most aobvious
It writes.Accordingly, the quantity of multiple dynamic pressure ditch 32 is preferably 12~20, and more preferably 16.On the other hand, Fig. 7 institute is please referred to
Show, when the depth of each dynamic pressure ditch 32 is 24~26 μm, the effect for reducing the friction torque of the shaft 21 is the most significant.Accordingly, respectively
The depth of dynamic pressure ditch 32 is preferably 20~30 μm, and more preferably 24~26 μm.
Shown in referring to figure 2., in the present embodiment, which is set to the bearing 12 in the axial direction of the shaft 21
Between the thrust plate 22, therefore, the two sides of the thrust plate 22 are respectively facing the locating piece 13 and the surface 31 of the dynamic pressure plate 3.
But please refer to shown in Fig. 8, in section Example of the present invention, which can be in the radially setting of the shaft 21
In 12 outside of the bearing, therefore the side of the thrust plate 22 can be simultaneously towards the bearing 12 and the locating piece 13, therefore this hair
It is bright to be not limited thereto.Wherein, since the accommodating space S between the dynamic pressure plate 3 and the bearing 12 is for accommodating lubricating fluid, because
The side of this thrust plate 22 can keep a spacing with the surface 31 of the dynamic pressure plate 3, and the other side of the thrust plate 22 then may be used
A spacing is kept with the bearing 12 or the locating piece 13, enables the shaft 21 freedom to pivot in the clear.
Shown in referring to figure 2., in the present embodiment, which is equipped with a bottom cover far from the side of the opening 111
112, which closes the side of the bearing holder (housing, cover) 11 far from the opening 111, forms it into closing.The dynamic pressure plate 3 can be set
In on the bottom cover 112, form it into side of the bearing holder (housing, cover) 11 far from the opening 111.
It is worth noting that, the thickness of the dynamic pressure plate 3 in the axial direction of the shaft 21 is preferably less than the thickness of the bottom cover 112
Degree, so that the dynamic pressure plate 3 is not influenced the whole axial height of the motor of the first embodiment vulnerable to setting.But the dynamic pressure
Plate 3 must be provided with multiple dynamic pressure ditches 32, if being intended to reduce the thickness of the dynamic pressure plate 3, may result in the table being difficult in the dynamic pressure plate 3
The multiple dynamic pressure ditch 32 of 31 machine-shaping of face.For this purpose, please referring to shown in Fig. 9, in the present embodiment, which includes mutual
In conjunction with a plate 3a and pedestal 3b, which is located on plate 3a towards the surface of the thrust plate 22 31, the pedestal
The hardness of 3b is greater than the hardness of plate 3a.It whereby, can by opening up multiple dynamic pressure ditch 32 on the lesser plate 3a of hardness
It, still, should since plate 3a is incorporated into the biggish pedestal 3b of hardness to reduce the difficulty of processing of multiple dynamic pressure ditch 32
Dynamic pressure plate 3 still is able to maintain enough rigidity.Also, the center plate 3a can open up a perforation or be connected to the surface 31
A blind hole the difficulty of processing of the hole slot 33 can also be made effective since the hardness of plate 3a is smaller as the hole slot 33
It reduces.
In detail, the plate 3a of the dynamic pressure plate 3 can be a flexible circuit board, and therefore, the surface 31 of plate 3a can
Multiple dynamic pressure ditch 32 is shaped in a manner of through etching (such as: chemical etching or laser etching) or electroforming etc..For example, should
Plate 3a can be flexible circuit board, and the flexible circuit plate surface can be equipped with copper foil, therefore can be by etching the copper foil
To shape multiple dynamic pressure ditch 32.Whereby, the difficulty of processing of multiple dynamic pressure ditch 32 can be effectively reduced, and the etching or electricity
Casting process can easily control the width and depth of each dynamic pressure ditch 32, to promote the forming accuracy of the dynamic pressure ditch 32.It should
Pedestal 3b can be plate body made of metal material (such as: stainless steel plate or aluminium sheet), and whereby, the hardness of pedestal 3b will be long-range
In the hardness of plate 3a, pedestal 3b is enable effectively to maintain the rigidity of the dynamic pressure plate 3.Wherein, pedestal 3b can be equipped with
One groove 35 promotes the bond strength of plate 3a Yu pedestal 3b for accommodating plate 3a.But please refer to figure
It is the motor of the second embodiment of the present invention shown in 10 and Figure 11, wherein for pedestal 3b without opening up groove, plate 3a can
It is fixed on pedestal 3b by by combining in a manner of welding or bind etc., therefore the present invention is not limited thereto.
And, wherein pedestal 3b includes an outer peripheral edge 34, which can abut the inner circumferential of the bearing holder (housing, cover) 11
Wall, pedestal 3b are equipped with a recess portion 341 in the periphery, which can be in the assembling process of the dynamic pressure plate 3 for nozzle
Accommodating space S is protruded into, to facilitate injection lubricating fluid.In addition, the recess portion 341 is also for being incorporated into the bearing holder (housing, cover) 11, with solid
The position of the fixed dynamic pressure plate 3, so as to preventing the dynamic pressure plate 3 from rotating relative to the bearing holder (housing, cover) 11.
In addition, in this second embodiment, which can be additionally provided with one between the dynamic pressure plate 3 and the bottom cover 112
A sealing ring 14, the sealing ring 14 can have the material of favorable elasticity to be made by rubber or silica gel etc., which can
Increase the adaptation of the dynamic pressure plate 3 and the bottom cover 112, leaks out to the dynamic pressure plate 3 to avoid the lubricating fluid in accommodating space S
Between the bottom cover 112.
In conclusion the motor and its dynamic pressure plate 3 of various embodiments of the present invention are by means of the surface 31 of the dynamic pressure plate 3 equipped with more
A 32 structure of dynamic pressure ditch, is filled in lubricating fluid in each dynamic pressure ditch 32, can increase between the dynamic pressure plate 3 and the thrust plate 22
Layer of lubrication fluid effective thickness and support force.Accordingly, the axis 92 for comparing aforementioned existing motor 9 bears pressure or is turning
When generating vibration during dynamic, the layer of lubrication fluid thickness between axial thrust plate 911 and thrust plate 921 will be thinning, very
To generating the situation that directly contacts with the thrust plate 921 of the axial thrust plate 911.The motor of various embodiments of the present invention can have
Effect avoids the layer of lubrication fluid thinning, and to prevent the dynamic pressure plate 3 from directly contacting with the thrust plate 22, having really reduces the shaft
The effect of 21 friction torque.
Also, the dynamic pressure plate of the motor of various embodiments of the present invention may include that a plate 3a and hardness are greater than the plate
The surface 31 of the pedestal 3b of 3a, plate 3a can shape multiple dynamic pressure ditch 32 by modes such as etching or electroforming, to reach
It reduces the difficulty of processing of multiple dynamic pressure ditch 32 and maintains effect of the rigidity of the dynamic pressure plate 3.
Claims (35)
1. a kind of motor, characterized in that it comprises:
One pedestal is equipped with a bearing holder (housing, cover), is equipped with a bearing inside the bearing holder (housing, cover)；
One rotor, the rotor include that a shaft and a thrust plate, the shaft are incorporated into the bearing, thrust plate setting
In one end of the shaft；And
One dynamic pressure plate, the dynamic pressure plate are set to the side of the bearing holder (housing, cover), and the dynamic pressure plate is towards the thrust plate, the thrust plate position
Between the bearing and the dynamic pressure plate, which includes the plate and pedestal be combineding with each other, and dynamic pressure plate direction should be only
The surface of push plate is located on the plate, and the hardness of the pedestal is greater than the hardness of the plate, and the surface of the plate is to etch or electroforming
Shape multiple dynamic pressure ditches.
2. motor as described in claim 1, which is characterized in that the dynamic pressure plate center is equipped with a hole slot.
3. motor as claimed in claim 2, which is characterized in that one end that the shaft is equipped with the thrust plate is adjacent with the hole slot
It connects.
4. motor as claimed in claim 2, which is characterized in that the dynamic pressure plate includes a lubrication groove towards the surface of the thrust plate
Wide and an outer profile, the Internal periphery cover the hole slot, which covers the Internal periphery, and the outer profile and the dynamic pressure plate
Outer peripheral edge has a spacing, and a region is constituted between the Internal periphery and the outer profile, and each dynamic pressure ditch is set in the region.
5. motor as claimed in claim 4, which is characterized in that the thrust plate has one towards a bottom surface of the dynamic pressure plate
The outer profile is covered in outer peripheral edge, the outer peripheral edge in the axial direction of the shaft.
6. motor as claimed in claim 4, which is characterized in that the thrust plate has one towards a bottom surface of the dynamic pressure plate
Inner peripheral, the Internal periphery cover the inner peripheral in the axial direction of the shaft.
7. motor as claimed in claim 2, which is characterized in that there are two lateral margins for each dynamic pressure ditch tool, and centered on the hole slot,
The partial sector of at least one lateral margin of each dynamic pressure ditch is completely formed a helical.
8. motor as claimed in claim 7, which is characterized in that the helical is equiangular spiral.
9. motor as claimed in claim 4, which is characterized in that for each dynamic pressure ditch tool there are two lateral margin, each dynamic pressure ditch includes one
First end and a second end, two lateral margins are separately connected the first end and the second end, the first end position
In in the Internal periphery, which is located in the outer profile.
10. motor as claimed in claim 9, which is characterized in that the partial sector of at least one lateral margin of each dynamic pressure ditch is complete
Portion forms the involute gradually stretched by the first end towards the second end.
11. motor as claimed in claim 9, which is characterized in that the spacing of two lateral margins by the first end towards this second
End is cumulative.
12. motor as claimed in claim 9, which is characterized in that the Internal periphery and the outer profile are respectively in the dynamic pressure plate
The heart is the circle in the center of circle.
13. motor as claimed in claim 12, which is characterized in that the dynamic pressure plate is towards the surface of the thrust plate including one point
Boundary's profile, the boundary profile are using the dynamic pressure plate center as the circle in the center of circle, which is located at the Internal periphery and the foreign steamer
Between exterior feature, a first area is constituted between the Internal periphery and the boundary profile, is constituted between the boundary profile and the outer profile
One second area, and centered on the hole slot, section of at least one lateral margin of each dynamic pressure ditch in the first area is formed
One equiangular spiral, the section of an at least lateral margin in this second area form an involute.
14. motor as claimed in claim 13, which is characterized in that the Internal periphery has one first with respect to the dynamic pressure plate center
Radius ri, the outer profile is with respect to the dynamic pressure plate center with a second radius ro, the boundary profile is with respect to the dynamic pressure plate center
One third radius rmIt is expressed as follows shown in formula:
rm=ri+ (ro-ri)/K
Wherein, 1 < K < 1.5.
15. motor as claimed in claim 13, which is characterized in that the angle of the equiangular spiral is 25 ° ~ 35 °.
16. motor as claimed in claim 13, which is characterized in that the involute is in the tangential angle of the endpoint of the outer profile
It is 11 ° ~ 13 °.
17. such as the described in any item motors of claim 1 to 16, which is characterized in that the quantity of multiple dynamic pressure ditch is 12 ~ 20
It is a.
18. motor as claimed in claim 17, which is characterized in that the quantity of multiple dynamic pressure ditch is 16.
19. such as the described in any item motors of claim 1 to 16, which is characterized in that each dynamic pressure ditch is in the axial direction of the shaft
Depth is 20 ~ 30 μm.
20. motor as claimed in claim 19, which is characterized in that depth of each dynamic pressure ditch in the axial direction of the shaft be 24 ~
26μm。
21. such as the described in any item motors of claim 1 to 16, which is characterized in that a locating piece is equipped with inside the bearing holder (housing, cover),
The locating piece is incorporated into the internal perisporium of the bearing holder (housing, cover), and the locating piece abuts the bearing.
22. motor as claimed in claim 21, which is characterized in that the side of the thrust plate and the surface of the dynamic pressure plate keep one
A spacing, the other side of the thrust plate and the bearing or the locating piece keep a spacing.
23. such as the described in any item motors of claim 1 to 16, which is characterized in that the thrust plate and the shaft are welded by laser
Binding is closed.
24. motor as described in claim 1, which is characterized in that the plate is a flexible circuit board.
25. motor as described in claim 1, which is characterized in that the pedestal is plate body made of metal material.
26. such as the described in any item motors of claim 1 to 16, which is characterized in that the dynamic pressure plate is set on a bottom cover, and
One sealing ring is set between the dynamic pressure plate and the bottom cover.
27. motor as claimed in claim 26, which is characterized in that the sealing ring is made of rubber or silica gel.
28. a kind of dynamic pressure plate of motor, characterized in that it comprises:
One plate, a surface of the plate are equipped with multiple dynamic pressure ditches with etching or electrotyping process；And
One pedestal, the hardness of the pedestal are greater than the hardness of the plate, which is incorporated into the pedestal backwards to the side on the surface.
29. the dynamic pressure plate of motor as claimed in claim 28, which is characterized in that the plate center is equipped with a hole slot.
30. the dynamic pressure plate of motor as claimed in claim 28, which is characterized in that the plate is a flexible circuit board.
31. the dynamic pressure plate of motor as claimed in claim 28, which is characterized in that the pedestal is plate body made of metal material.
32. the dynamic pressure plate of the motor as described in claim 28,29,30 or 31, which is characterized in that the quantity of multiple dynamic pressure ditch
It is 12 ~ 20.
33. the dynamic pressure plate of motor as claimed in claim 32, which is characterized in that the quantity of multiple dynamic pressure ditch is 16.
34. the dynamic pressure plate of the motor as described in claim 28,29,30 or 31, which is characterized in that each dynamic pressure ditch is in an axial direction
Depth be 20 ~ 30 μm, the axially vertical surface.
35. the dynamic pressure plate of motor as claimed in claim 34, which is characterized in that depth of each dynamic pressure ditch in the axial direction is 24
~26μm。
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TW105128299A TWI599150B (en) | 2016-09-01 | 2016-09-01 | Motor and dynamic pressure plate thereof |
| TW105128299 | 2016-09-01 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107800234A CN107800234A (en) | 2018-03-13 |
| CN107800234B true CN107800234B (en) | 2019-08-02 |
Family
ID=60719658
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610834547.0A Active CN107800234B (en) | 2016-09-01 | 2016-09-20 | Motor and movable platen thereof |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN107800234B (en) |
| TW (1) | TWI599150B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI648938B (en) * | 2017-12-29 | 2019-01-21 | 建準電機工業股份有限公司 | motor |
| TWI705190B (en) * | 2019-08-27 | 2020-09-21 | 建準電機工業股份有限公司 | Bearing system |
| TWI715450B (en) * | 2020-02-25 | 2021-01-01 | 建準電機工業股份有限公司 | Bearing system and it`s thrust plate |
| TWI768423B (en) * | 2020-08-05 | 2022-06-21 | 建準電機工業股份有限公司 | Bearing system and motor including the same |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1711429A (en) * | 2002-10-24 | 2005-12-21 | Ntn株式会社 | Hydrodynamic bearing device |
| CN1757942A (en) * | 2004-10-01 | 2006-04-12 | 松下电器产业株式会社 | Hydrodynamic bearing device, and spindle motor and information device using the same |
| CN101542143A (en) * | 2006-12-20 | 2009-09-23 | Ntn株式会社 | Shaft member for fluid bearing device and method of producing the same |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06333331A (en) * | 1993-05-20 | 1994-12-02 | Matsushita Electric Ind Co Ltd | Disk rotating device |
| JP3411421B2 (en) * | 1995-03-31 | 2003-06-03 | 松下電器産業株式会社 | Manufacturing method of thrust plate for spindle motor |
| KR100213882B1 (en) * | 1996-11-06 | 1999-08-02 | 윤종용 | Hydrodynamic fluid bearing with uniform pressure distribution |
| TWI279062B (en) * | 2001-10-24 | 2007-04-11 | Sony Corp | Bearing unit, and motor using same |
| TWM486896U (en) * | 2014-01-08 | 2014-09-21 | Delta Electronics Inc | Motor |
-
2016
- 2016-09-01 TW TW105128299A patent/TWI599150B/en active
- 2016-09-20 CN CN201610834547.0A patent/CN107800234B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1711429A (en) * | 2002-10-24 | 2005-12-21 | Ntn株式会社 | Hydrodynamic bearing device |
| CN1757942A (en) * | 2004-10-01 | 2006-04-12 | 松下电器产业株式会社 | Hydrodynamic bearing device, and spindle motor and information device using the same |
| CN101542143A (en) * | 2006-12-20 | 2009-09-23 | Ntn株式会社 | Shaft member for fluid bearing device and method of producing the same |
Also Published As
| Publication number | Publication date |
|---|---|
| TW201813255A (en) | 2018-04-01 |
| CN107800234A (en) | 2018-03-13 |
| TWI599150B (en) | 2017-09-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107800234B (en) | Motor and movable platen thereof | |
| JP5980396B2 (en) | mechanical seal | |
| JP5968889B2 (en) | Sliding parts | |
| US9494239B2 (en) | Sliding parts | |
| CN1203261C (en) | Mfg. method of thrust plate and mfg. method of shaft for fluid power bearing | |
| CN1730958A (en) | Hydrodynamic bearing device, motor and disc driving apparatus | |
| JP2005256965A (en) | Sliding bearing | |
| JP2008000833A (en) | Fluid barrel polishing device | |
| JP2006105237A (en) | Fluid dynamic pressure bearing, spindle motor provided with the fluid dynamic pressure bearing, and recording disc drive provided with the spindle motor | |
| JP2007100958A (en) | Fluid bearing assembly | |
| CN103683630A (en) | Spindle motor and hard disc drive including the same | |
| JP2010031663A (en) | Triaxial screw pump | |
| JP2004144205A (en) | Dynamic pressure bearing device | |
| KR20030082398A (en) | Method for manufacturing hydro dynamic bearing device | |
| CN212615888U (en) | Bearing system and thrust plate thereof | |
| JP6123985B2 (en) | Half thrust bearing | |
| CN202946371U (en) | Internal gear pump | |
| JP2009138926A (en) | Differential gear set having improved lubricating structure | |
| CN203822684U (en) | Dynamic pressure bearing structure | |
| CN104976149A (en) | Dynamic pressure bearing structure and assembly method thereof | |
| JP2016023581A (en) | Gear pump and motor | |
| CN100502204C (en) | Motor positioning ring structure | |
| JP2012031969A (en) | Hub integrated shaft for fluid dynamic pressure bearing device, and method for manufacturing the same | |
| JPH11210644A (en) | Gear pump motor | |
| CN109995180A (en) | Motor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |