CN109861436A - The axial damping structure and electric motor units of electric motor units - Google Patents
The axial damping structure and electric motor units of electric motor units Download PDFInfo
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- CN109861436A CN109861436A CN201711247095.7A CN201711247095A CN109861436A CN 109861436 A CN109861436 A CN 109861436A CN 201711247095 A CN201711247095 A CN 201711247095A CN 109861436 A CN109861436 A CN 109861436A
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Abstract
The present invention provides the axial damping structure and electric motor units of a kind of electric motor units, the electric motor units have motor and gear-box, motor is installed on gear-box, the rotary shaft of motor is out of, motor reaches gear-box gearbox-case, the power exported from motor is output to the outside after gearbox speed reduction, axial damping structure is in gearbox-case on the outside of the front end face of rotary shaft, for applying axial thrust to the rotary shaft, axial damping structure includes the axis stop section playing the buffer unit of buffer function and offseting with the front end face of rotary shaft, buffer unit and axis stop section are clipped between the front end face of rotary shaft and the inner face of gearbox-case, the tubular in hole is formed through centered on buffer unit, axis stop section is formed to have two sections of disc-shapes of small diameter portion and large-diameter portion, the small diameter portion of axis stop section extend into buffer unit Through hole in cooperated.Hereby it is possible to improve reaction force with minimum shape, rubber will not be full of inside.
Description
Technical field
The present invention relates to a kind of axial damping structures of electric motor units with retarder, such as are related to the power windows of vehicle
Or the axial damping structure and electric motor units of electric motor units used in the opening and closing of the electronic accessory such as sunroofs.
Background technique
In the past, the mechanism as the electronic accessory (by taking power windows as an example) installed on driving automobile, it is known to have and subtract
The electric motor units of fast device.This electric motor units include motor and the retarder (gear-box) that sufficiently slows down to the rotation of motor, tooth
It include the worm screw being formed on electric machine rotational axis and the worm gear engaged with the worm screw in roller box.
In previous electric motor units, in order to avoid generating axis in electric machine rotational axis end due to axial load applies repeatedly
Lead to noise to gap, there are the end of electric machine rotational axis setting dampers with the scheme of damping vibration.
Figure 11 is the cross-sectional view for indicating the electric motor units of the prior art (US8917001B2), and Figure 12 is indicated shown in Figure 11
The partial sectional view of the shock-damping structure of electric machine rotational axis end in electric motor units.
As is illustrated by figs. 11 and 12, electric motor units include gear-box 40 and the motor being installed on gear-box 30.Gear
Case 40 includes gearbox-case 34, the worm gear 44 being installed on gearbox-case 34, the output shaft being connected with worm gear 44 etc..Electricity
Machine 30 is Permanent magnet DC (PMDC) brush motor, including stator and rotor.Stator includes motor housing 41, is installed to motor housing
Permanent magnet 42, the carbon brush configuration for being installed to 41 one end of motor housing in 41 etc..Rotor is pivotally mounted on stator, including
Rotary shaft 31, the commutator 32 fixed to rotary shaft, rotor core 33, worm screw 35 etc..Worm screw 35 engages with worm gear 44, thus band
The output shaft of movable tooth roller box externally exports.
In addition, the both ends of rotary shaft 31 are arrived to respectively on damper 36 and damper 38.The left side of rotary shaft 31 via
Damper 36 and abutted with gearbox-case 34, abutted via damper 38 with motor housing 41 on the right side of rotary shaft 31,
In this way, the vibration of 31 axial direction of rotary shaft is just absorbed by damper 36 and damper 38 respectively.
Damper 36 is installed in gearbox-case 34, including maintaining part 50, rubber pad 51 and thrust pad 52.Wherein, it protects
Portion 50 is held for installing rubber pad 51 and thrust pad 52.Maintaining part 50 is in tubular structure, and the both ends of hollow pipe are open end.It protects
Portion 50 is held closely to be housed in gearbox-case 34.Inner wall in the income to maintaining part 50 of rubber pad 51 with gearbox-case 34
It abuts, thrust pad 52 also is located in maintaining part 50, abuts with rubber pad 51, and rubber pad 51 is clipped in thrust pad 52 and gearbox-case
Between 34 inner walls.Bearing 37 is also taken in maintaining part 50, and it is nearby and spaced apart to be located at thrust pad 52.Rotary shaft 31 is by bearing 37
Bearing.The axial left part of rotary shaft 31 is abutted with thrust pad 52.Damper 38 is installed in motor housing 41.Rotary shaft 31 with
When different rotation directions drives worm gear, axial float is buffered by damper 36 and damper 38 respectively, to be buffered in electricity
Damage of the impact force to worm gear when machine commutation rotation.
The means for being set as described above damper can play certain buffering effect, but this shock absorber structure compares
Greatly, compression set is big, moreover, being full of rubber pad in maintaining part, damper is difficult to be acted, so that there are rubber pads is big
Type and the bad problem of buffering effect.
Summary of the invention
Present invention has been made in view of the above problems, and its purpose is to provide one kind to improve reaction with minimum shape
Power, also, padded coaming (rubber) will not be full of the axial damping structure and electric motor units of internal electric motor units.
To achieve the goals above, the present invention provides a kind of axial damping structure of electric motor units, which has
Motor and gear-box, above-mentioned motor are installed on said gear case, and the rotary shaft of above-mentioned motor reaches above-mentioned from above-mentioned motor
In the gearbox-case of gear-box, the power exported from above-mentioned motor is output to the outside after the deceleration of said gear case, wherein on
Axial damping structure is stated in said gear box enclosure on the outside of the front end face of above-mentioned rotary shaft, for applying to the rotary shaft
Axial thrust, above-mentioned axial damping structure include playing the buffer unit of buffer function and offseting with the front end face of above-mentioned rotary shaft
Axis stop section, above-mentioned buffer unit and above-mentioned axis stop section are clipped in the front end face and said gear box enclosure of above-mentioned rotary shaft
Between inner face, the tubular in hole is formed through centered on above-mentioned buffer unit, above-mentioned axis stop section is formed to have path
Two sections of disc-shapes in portion and the large-diameter portion bigger than the diameter of the small diameter portion, the small diameter portion of above-mentioned axis stop section extend into above-mentioned slow
It rushes in the through hole of component and is cooperated.
On the basis of above structure, preferably: being contained in said gear box enclosure and electric in above-mentioned axial damping structure
Under the motor assembled state that machine unit does not work, the first abutting part and said gear box enclosure of the peripheral side of above-mentioned buffer unit
Inner peripheral surface abut against and compressive deformation, the second abutting part of above-mentioned buffer unit and the inner face of said gear box enclosure offset
It connects and compressive deformation, the large-diameter portion of the third abutting part of above-mentioned buffer unit and above-mentioned axis stop section abuts against and compressive deformation.
On the basis of above structure, preferably: the through hole inner circumferential side central portion of above-mentioned buffer unit is roused to radially inner side
Act the fitting projection being formed with the cooperation of the small diameter portion of above-mentioned axis stop section.
On the basis of above structure, preferably: the section of above-mentioned buffer unit is shaped generally as triangle, above-mentioned triangle
Three angles be respectively above-mentioned first abutting part, above-mentioned second abutting part and above-mentioned third abutting part.
On the basis of above structure, preferably: being contained in said gear box enclosure and electric in above-mentioned axial damping structure
Under the motor assembled state that machine unit does not work, the front end face of the small diameter portion of above-mentioned axis stop section is interior with said gear box enclosure
There are gap between end face, in electric motor units work, with increasing from the application load of above-mentioned rotary shaft, above-mentioned buffer unit
It is further compressed deformation, the gap between the small diameter portion and said gear box enclosure of above-mentioned axis stop section becomes smaller.
On the basis of above structure, preferably: above-mentioned when above-mentioned application load is prespecified limitation load or more
The small diameter portion of axis stop section and the inner face of said gear box enclosure abut against, and above-mentioned gap disappears, and above-mentioned buffer unit stops
Excess compression deformation.
On the basis of above structure, preferably: in above-mentioned axial damping structure, being abutted by the first of above-mentioned buffer unit
The corner that portion to the periphery of the second abutting part and the inner wall of said gear box enclosure are surrounded is formed with confined space, above-mentioned close
Close and be closed with air in space, in the case where above-mentioned buffer unit is by compressive deformation, air in above-mentioned confined space also by
Compression, plays the attenuation of air spring.
On the basis of above structure, preferably: above-mentioned buffer unit is made of multiple material, the structure of above-mentioned first abutting part
At material coefficient of friction be above-mentioned buffer unit in other parts constituent material coefficient of friction more than.
On the basis of above structure, preferably: the inner peripheral surface in above-mentioned buffer unit with said gear box enclosure abuts against
The surface of above-mentioned first abutting part be roughened processing.
On the basis of above structure, preferably: the inner peripheral surface in above-mentioned buffer unit with said gear box enclosure abuts against
Above-mentioned first abutting part be formed as the outer diameter straight line portion of external diameter constant, set by the axial overall width of above-mentioned buffer unit
When being set as L1 for the axial width of L, above-mentioned outer diameter straight line portion, L1=0.05~0.6L.
In addition, the present invention also provides a kind of electric motor units, with motor and the gear-box linked with above-mentioned motor, upper
It states in the gearbox-case of gear-box and is provided with above-mentioned axial damping structure on the outside of the front end face of above-mentioned rotary shaft, on
Axial damping structure is stated to be located between the front end face of above-mentioned rotary shaft and the inner face of said gear box enclosure.
Invention effect
According to above-mentioned axial damping structure, axial gap is not present using the shrinkage of buffer unit, always to rotary shaft
Apply axial thrust, also, buffer unit has three abutting parts abutted respectively with axis stop section and gearbox-case,
He does not contact part with gearbox-case, becomes the structure being not filled in gearbox-case.
Moreover, axial pooling feature (attenuating) in addition to mainly utilize buffer unit itself rubber compression property it
Outside, the frictional force that can be also generated by the sliding between buffer unit circumferential lateral surface and gearbox-case inner peripheral surface (influences axial
Reaction force) effect that plays damping, it can reliably inhibit to generate collision sound.
Accordingly, buffer unit improves reaction force (spring constant) with minimum shape, will not become the structure that rubber is full of,
Environment to which buffer unit will not be caused to be difficult to act.
In addition, the compressed air in the confined space that corner is formed between buffer unit and gear chamber interior wall can also play sky
The attenuation of gas spring.
In addition to this, in axial load excessive (more than the restraining moment) that motor applies, outside axis stop section and gear-box
The inner face of shell offsets, and will not make buffer unit excess compression, while can preventing its permanent deformation, can also prevent rotary shaft super
Prespecified range is mobile out.
Detailed description of the invention
Fig. 1 is the perspective view of electric motor units of the invention.
Fig. 2 is the partial sectional view of electric motor units of the invention (without worm gear portion).
Fig. 3 is the partial sectional view of electric motor units of the invention (showing a part of worm gear portion).
Fig. 4 is the partial enlarged view for indicating axial damping structure part point in Fig. 3.
Fig. 5 is the sectional view for indicating the buffer unit in electric motor units of the invention.
Fig. 6 is the axial deformation for the buffer unit for indicating that the material of different coefficient of elasticity is constituted and the curve graph of reaction force.
Fig. 7 a, Fig. 7 b, Fig. 7 c, Fig. 7 d are the deformation analysis diagram for indicating buffer unit of the invention under different conditions respectively.
Fig. 8 is the axial deformation for indicating the padded coaming of different coefficients of friction and the curve graph of reaction force.
Fig. 9 is the dynamic balance schematic diagram for indicating shock-damping structure of the invention under restraining moment state.
Figure 10 is the main view for indicating the variation of padded coaming of the invention.
Figure 11 is the cross-sectional view for indicating electric motor units in the prior art.
Figure 12 is the partial sectional view for indicating the shock-damping structure of electric machine rotational axis end in electric motor units shown in Figure 11.
Symbol description
10 motors
11 axial damping structures
12 buffer units
120 through holes
121 first abutting parts
122 second abutting parts
123 third abutting parts
124 fitting projections
13 axis stop sections
131 small diameter portions
132 large-diameter portions
14 retainers
15 rotary shafts
16 axial damping structures
17 motor housings
18 confined spaces
19 gaps
20 gear-boxes
21 worm gears
22 output shafts
23 worm screws
24 gearbox-cases
Specific embodiment
Electric motor units of the invention can be suitable for driving the power-operated window system or roof on vehicle as driving mechanism
The movement of the electronic accessories such as skylight, automatic adjustable seat, door engine.
Illustrate embodiments of the present invention with reference to the accompanying drawings.In the description of the drawings, identical mark is assigned to same parts
Number, and suitably the repetitive description thereof will be omitted.Moreover, composition as described below is only to illustrate, not limit the scope of the invention.
Fig. 1 is the perspective view of electric motor units of the invention.As shown in Figure 1, electric motor units include motor 10 and gear-box 20,
Motor 10 is installed on gear-box 20, after the output of motor 10 is carried out deceleration adjustment as retarder by gear-box 20, from output
Axis 22 is output to the outside power.
Fig. 2 is the partial sectional view of electric motor units of the invention (without worm gear portion), and Fig. 3 is electric motor units of the invention
The partial sectional view of (showing a part of worm gear portion).
As shown in Figure 2 and Figure 3, the motor housing 17 of motor 10 is fitted together with the gearbox-case 24 of gear-box 20, electricity
The rotary shaft 15 of machine 10 is out of, motor housing 17 reaches gear-box 20 to the left gearbox-case 24, at the both ends of rotary shaft 15
And the bearing of its rotation of bearing can be respectively configured in middle part.It is housed in the front end shape of the rotary shaft 15 in gearbox-case 24
At there is worm screw 23, worm screw 23 is meshed with worm gear 21, and output shaft 22 is linked on worm gear 21, via output shaft 22 to external device (ED)
Transmit driving force.
In gearbox-case 24, there is the retainer radially kept to rotary shaft in the front end of rotary shaft 15
14, the front end face outside of rotary shaft 15 is equipped with the axial damping structure 11 for applying axial thrust to rotary shaft 15, axial damping knot
The axis stop section 13 that structure 11 includes the buffer unit 12 for playing buffer function, is offseted with the end face of rotary shaft 15, buffer unit 12
And axis stop section 13 is clipped between the front end face of rotary shaft 15 and the inner face of gearbox-case 24, passes through axial damping structure 11
Support rotary shaft 15 simultaneously acts on rotary shaft 15 axial thrust to the right.In addition, in 17 side of motor housing of rotary shaft 15
It may also set up another axial damping structure 16 on the outside of front end face, the movement of rotary shaft 15 carried out jointly with axial damping structure 11
Buffering.
Fig. 4 is the partial enlarged view for indicating 11 part of axial shock-damping structure in Fig. 3, and Fig. 5 is to indicate motor list of the invention
The sectional view of buffer unit 12 in member.
As shown in Figure 4, Figure 5, for example tubular is made by rubber or resin in buffer unit 12, and central part is formed through hole
120, axis stop section 13 is formed as two sections of different disc-shapes of diameter, has small diameter portion 131 and the diameter than the small diameter portion 131
Big large-diameter portion 132.In the state that buffer unit 12 is contained in gearbox-case 24, the first abutting part 121 of outer peripheral surface
It is abutted against and compressive deformation with the inner peripheral surface of gearbox-case 24, the second abutting part 122 and the gearbox-case 24 of left side
Inner face abuts against and compressive deformation, and the third abutting part 123 of right side is abutted against with the large-diameter portion 132 of axis stop section 13 and pressed
Compression deformation, the small diameter portion 131 of axis stop section 13 extend into the through hole 120 of buffer unit 12 and run through with buffer unit 12
120 inner peripheral surface of hole matches.In addition, the 120 inner circumferential side central portion of through hole of buffer unit 12 slightly heaves shape to radially inner side
At there is fitting projection 124, accordingly, after the small diameter portion 131 of axis stop section 13 is inserted through hole 120,124 part of fitting projection
It is crushed, and can be matched with the small diameter portion 131 of axis stop section 13.Moreover, the section of the buffer unit 12 of tubular can also be with
It is shaped generally as triangle, each abutting part is respectively three angles of triangle, preferably carries out chamfering to each abutting part.
In addition, as shown in figure 4, under the motor assembled state that electric motor units do not work, the small diameter portion 131 of axis stop section 13
Front end face and gearbox-case 24 inner face between there are gaps 19, as rotary shaft is applied to axial damping structure 11
Load increases, and the continuous compressive deformation of buffer unit 12, gap 19 gradually becomes smaller, until the front end face of small diameter portion 131 arrives to tooth
On the inner face for taking turns box enclosure 24, then gap 19 disappears, not further compression (deformation of stopping excess compression) of buffer unit 12,
At this moment compressive load is known as " restraining moment ".
Accordingly, deform 12 excess compression of buffer unit in the axial load excessive (more than restraining moment) that motor applies
When, the small diameter portion 131 and the inner face of gearbox-case 24 being embedded in through hole 12 offset, and stop buffer unit 12 further
Compressive deformation, while its permanent deformation can be prevented, can also prevent rotary shaft 15 mobile beyond prespecified range.
In addition, since the inner peripheral surface of the first abutting part 121 and gearbox-case 24 of 12 circumferential lateral surface of buffer unit offsets
Connect, thus buffer unit constantly it is compressed during, the sliding between buffer unit circumferential lateral surface and gear-box can generate with
The opposite axial friction of compression direction, the frictional force also become a part of axial reaction force, play the effect of damping.
Moreover, in above-mentioned axial damping structure 11, due to the first abutting part 121 of buffer unit 12 and the second abutting part
122 all abut against with gearbox-case 24, therefore by the periphery of 121 to the second abutting part 122 of the first abutting part and gearbox-case
The corner that 24 inner wall is surrounded forms confined space 18, is closed with air in confined space 18, is pressed in buffer unit 12
In the case where compression deformation, the air in confined space 18 is equally compressed, at this moment, wherein closed compressed air can play sky
The attenuation of gas spring.As shown in figure 4, the section of confined space 18 is generally formed into triangle, to preferably play empty
The effect of gas spring.
Fig. 6 is the deformation for indicating the padded coaming of different coefficient of elasticity and the curve graph of reaction force.
As shown in fig. 6, being directed to axial damping structure of the invention, curve A, B, C respectively indicate coefficient of elasticity from high to low
Three kinds of materials constitute buffer unit axial deformation and reaction force between relationship change curve.It will be appreciated from fig. 6 that buffering
The reaction force that component generates not linearly increases with the increase of deformation, and increases in the form that curvature constantly becomes larger, i.e.,
It is rendered as conic section.Moreover, the Curvature varying of curve A is maximum, the Curvature varying of curve B takes second place, the Curvature varying of curve C most
It is small.It follows that when using the big material of coefficient of elasticity as buffer unit, generating reaction force in equivalent variations
Also big, and deformation is bigger, and the frictional force that buffer unit peripheral side generates is also bigger, therefore buffering effect increase is more obvious.
Fig. 7 a, Fig. 7 b, Fig. 7 c, Fig. 7 d are the deformation parsing for indicating buffer unit of the invention under different conditions respectively
Figure, wherein Fig. 7 a indicates that axial damping structure 11 is fitted into gearbox-case 24, and motor is also unassembled, i.e., when not applying load
Buffer unit 12 initial stage be arranged state；Fig. 7 b indicates buffer unit 12 when motor has carried out assembling but electric motor units do not work
Motor assembled state, Fig. 7 c indicate electric motor units work when apply intermediate cycling load buffer unit 12 intermediate cycling load state,
Fig. 7 d indicates the restraining moment state for applying the buffer unit 12 of limitation load when electric motor units work.
As shown in Fig. 7 a- Fig. 7 d, in the early stage under setting state, buffer unit 12 does not generate compression (displacement 0)；In motor group
Under dress state, certain load is applied to buffer unit 12 from rotary shaft 15, buffer unit 12 slightly generates compression (for example, displacement
0.8mm)；Under intermediate cycling load state, the amount of compression increases for buffer unit 12 (for example, displacement 1.0mm)；In restraining moment state
Under, the small diameter portion 131 of axis stop section 13 is abutted with the inner face of gearbox-case 24, and gap 19 is not present, and buffer unit 12 produces
Raw maximum compressibility (for example, displacement 1.2mm).
Fig. 8 is the deformation for indicating the padded coaming of different coefficients of friction and the curve graph of reaction force.
As shown in figure 8, be directed to axial damping structure of the invention, parsing example 1-3 curve respectively indicate coefficient of friction by
The change curve of relationship between the axial deformation and reaction force of the buffer unit that three kinds of high to low materials are constituted, parses example 4
Using material identical with parsing example 3, but the gearbox-case (periphery as buffer unit is eliminated in the side of buffer unit
The state that side will not be contacted with gearbox-case inner wall).As shown in Figure 8, the reaction force that the buffer unit of example 4 generates is parsed
As the increase of deformation linearly increases, the reaction force that the buffer unit of parsing example 1-3 generates is not as the increase of deformation is
Linearly increase, and increase in the form that curvature constantly becomes larger, that is, is rendered as conic section.Moreover, the Curvature varying of parsing example 1
Maximum, parsing example 2 Curvature varying takes second place, parse the Curvature varying minimum of example 3,
It follows that in equivalent variations, if side removes gearbox-case, due to the peripheral side of buffer unit
Face will not be contacted with gear chamber interior wall, and the circumferential lateral surface of buffer unit will not generate frictional force, and reaction force is mainly by buffering
Component compresses deformation generates, therefore the change curve of relationship is linear between the axial deformation of buffer unit and reaction force, and
There are in the case where frictional force for the circumferential lateral surface of buffer unit, it is clear that coefficient of friction is bigger, and corresponding reaction force is also bigger.
In addition, in order to improve the frictional force of the circumferential lateral surface of buffer unit 12, it is preferable that the inner peripheral surface with gearbox-case 24
The coefficient of friction of the first abutting part 121 abutted against is such ability in buffer unit 12 more than the coefficient of friction of other parts
Preferably enhance buffering effect.
For this purpose, buffer unit 12 can be made of multiple material, the coefficient of friction of the constituent material of the first abutting part 121
For in buffer unit 12 more than the coefficient of friction of the constituent material of other parts；Can also in buffer unit 12 with gearbox-case
The surface for the first abutting part 121 that 24 inner peripheral surface abuts against is roughened processing, to correspondingly increase rubbing for the first abutting part
Wipe coefficient, and then increasing friction force.
Fig. 9 is the dynamic balance schematic diagram for indicating shock-damping structure of the invention under restraining moment state.
As can be seen from Figure 9, the restraint abutted against in the inner face of axis stop section 13 (small diameter portion 131) and gearbox-case 24
Under square state, there are equilibrium relations below by axial load Fx.
That is, Fx=F3+F4-M1+M2
Wherein, F3 is the reaction force generated when axis stop section 13 and gearbox-case 24 abut against；
F4 is the reaction force generated at the second abutting part 122 of buffer unit 12；
M1 is reaction force F1 when 131 transverse direction of buffer unit 12 and small diameter portion abuts and the frictional force (F1* μ) that generates；
M2 is reaction force F2 when 24 transverse direction of the first abutting part 121 and gearbox-case of buffer unit 12 abuts and produces
Raw frictional force (F2* μ)；
μ is the coefficient of friction of buffer unit 12.
At motor assembled state (Fx=0), in the transverse direction of left and right, buffer unit 12 respectively with axis stop section 13 and gear-box
Shell 24 is in contact, and as Fx increases, reaction force F1, F2 also increase, in particular, the reaction force at the first abutting part 121
F2 especially becomes larger.
On the other hand, Fx increases the increase for meaning buffer unit contraction distortion, and buffer unit 12 can support only relative to axis
Portion 13 and gearbox-case 24 slide, and correspondingly generate frictional force M1, M2.
So in the case where applying axial load Fx, buffering effect (energy absorbing efficiency) is mainly by buffer unit itself
Rubber compression property and the force of sliding friction of itself and gearbox-case generate.
In addition to this, the range of 121 to the second abutting part 122 of the first abutting part and gearbox-case 24 on buffer unit 12
The angle part surrounded forms confined space 18, and air therein can also function to sky by compression with the contraction of buffer unit 12
The buffering effect of gas spring.
According to above-mentioned axial damping structure, buffer unit improves reaction force (spring constant) with minimum shape, reduces pressure
Compression permanent deformation will not become the structure that rubber is full of, thus the environment that buffer unit will not be caused to be difficult to act.
Figure 10 is the main view for indicating the variation of padded coaming.
As shown in Figure 10, for buffer unit 12 ', by its peripheral side, inner peripheral surface with gearbox-case 24 is abutted against
Part formed outer diameter straight line portion 121 ', constitute the first flat abutting part, hereby it is possible to increase in gearbox-case 24
The contact area of circumferential surface, so as to play better buffering effect.
" L1 " is set as the axial overall width of buffer unit 12 ' is set as the axial width in " L ", outer diameter straight line portion 121 '
When, L1 is 0.6L or more, and preferably L1 is the range of 0.05~0.6L.Accordingly, thick by changing the surface of outer diameter straight line portion 121 '
Rugosity is easily adjusted the coefficient of friction with gearbox-case.
In the above-described embodiment, for having three abutting parts respectively and outside axis stop section (end face) and gear-box
The buffer unit that shell (internal perisporium and inner end wall) abuts, is illustrated, but it does not limit to certainly by taking general triangular as an example
In this, ovalisation, taper, boss shape or other irregular shapes also can be set.
Equally, the confined space formed for the angle part that buffer unit and gearbox-case are surrounded, is not limited to three
It is angular, other closed shapes also can be set into.
In the above-described embodiment, it is illustrated so that electric motor units of the invention are applied on vehicle as an example, it is other
Mobile device is equally applicable.
As described above, the present invention has carried out abundant record to preferred embodiment referring to attached drawing, but for this field skill
Various modifications or change can be understood for art personnel, these deformations or change are limited as long as no technical solution of the present invention is detached from
Fixed range should all be included in wherein.
Claims (11)
1. a kind of axial damping structure (11) of electric motor units, which has motor (10) and gear-box (20), described
Motor (10) is installed on the gear-box (20), and the rotary shaft (15) of the motor (10) reaches institute from the motor (10)
In the gearbox-case (24) for stating gear-box (20), the power exported from the motor (10) is after the gear-box (20) slow down
It is output to the outside, the axial damping structure of the electric motor units is characterized in that:
The axial damping structure (11) is set on the outside of the front end face of the rotary shaft (15) in the gearbox-case (24),
For applying axial thrust to the rotary shaft (15),
The axial damping structure (11) include play buffer function buffer unit (12) and with before the rotary shaft (15)
The axis stop section (13) that end face offsets, the buffer unit (12) and the axis stop section (13) are clipped in the rotary shaft (15)
Between front end face and the inner face of the gearbox-case (24),
The tubular of hole (120) is formed through centered on the buffer unit (12), the axis stop section (13) is formed as having
There are two sections of disc-shapes of small diameter portion (131) and the large-diameter portion (132) bigger than the diameter of the small diameter portion (131),
The small diameter portion (131) of the axis stop section (13), which is extend into the through hole (120) of the buffer unit (12), is matched
It closes.
2. the axial damping structure of electric motor units as described in claim 1, it is characterised in that:
The axial damping structure (11) is contained in the gearbox-case (24) and motor group that electric motor units do not work
Under dress state, the first abutting part (121) of the peripheral side of the buffer unit (12) and the inner circumferential of the gearbox-case (24)
Face abuts against and compressive deformation, and the second abutting part (122) of the buffer unit (12) is interior with the gearbox-case (24)
End face abuts against and compressive deformation, and the third abutting part (123) of the buffer unit (12) is big with the axis stop section (13)
Diameter portion (132) abuts against and compressive deformation.
3. the axial damping structure of electric motor units as claimed in claim 2, it is characterised in that:
Through hole (120) inner circumferential side central portion of the buffer unit (12) is heaved to be formed with to radially inner side to be supported only with the axis
The fitting projection (124) of small diameter portion (131) cooperation in portion (13).
4. the axial damping structure of electric motor units as claimed in claim 2 or claim 3, it is characterised in that:
The section of the buffer unit (12) is shaped generally as triangle, and three angles of the triangle are respectively described first to support
Socket part (121), second abutting part (122) and the third abutting part (123).
5. the axial damping structure of electric motor units as claimed in claim 2 or claim 3, it is characterised in that:
The axial damping structure (11) is contained in the gearbox-case (24) and motor group that electric motor units do not work
Under dress state, the inner faces of the front end face of the small diameter portion (131) of the axis stop section (13) and the gearbox-case (24) it
Between there are gap (19),
In electric motor units work, with increasing from the application load of the rotary shaft, the buffer unit (12) is further
Compressive deformation, the gap (19) between the small diameter portion (131) and the gearbox-case (24) of the axis stop section (13) become smaller.
6. the axial damping structure of electric motor units as claimed in claim 5, it is characterised in that:
The application load be prespecified limitation load more than when, the small diameter portion (131) of the axis stop section (13) with
The inner face of the gearbox-case (24) abuts against, and the gap (19) disappears, and the buffer unit (12) stops excessive pressure
Compression deformation.
7. the axial damping structure of electric motor units as claimed in claim 2 or claim 3, it is characterised in that:
In the axial damping structure (11), by the first abutting part (121) of the buffer unit (12) to the second abutting part
(122) corner that the inner wall of periphery and the gearbox-case (24) is surrounded is formed with confined space (18), described close
It closes in space (18) and is closed with air, in the case where the buffer unit (12) is by compressive deformation, the confined space (18)
In air also compressed, play the attenuation of air spring.
8. the axial damping structure of electric motor units as claimed in claim 2 or claim 3, it is characterised in that:
The buffer unit (12) is made of multiple material, and the coefficient of friction of the constituent material of first abutting part (121) is
In the buffer unit (12) more than the coefficient of friction of the constituent material of other parts.
9. the axial damping structure of electric motor units as claimed in claim 2 or claim 3, it is characterised in that:
First abutting part (121) abutted against in the buffer unit (12) with the inner peripheral surface of the gearbox-case (24)
Surface be roughened processing.
10. the axial damping structure of electric motor units as claimed in claim 2 or claim 3, it is characterised in that:
First abutting part abutted against in the buffer unit with the inner peripheral surface of the gearbox-case is formed as outer diameter perseverance
Fixed outer diameter straight line portion,
When the axial overall width of the buffer unit is set as L, the axial width of the outer diameter straight line portion is set as L1,
L1=0.05~0.6L.
11. a kind of electric motor units, it is characterised in that:
The electric motor units have motor (10) and the gear-box (20) with the motor (10) connection, in the gear-box (20)
Gearbox-case (24) in positioned at the rotary shaft (15) front end face on the outside of be provided with any one of claim 1~10
The axial damping structure (11), the axial damping structure (11) are located at the front end face and the tooth of the rotary shaft (15)
Between the inner face for taking turns box enclosure (24).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711247095.7A CN109861436A (en) | 2017-11-30 | 2017-11-30 | The axial damping structure and electric motor units of electric motor units |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711247095.7A CN109861436A (en) | 2017-11-30 | 2017-11-30 | The axial damping structure and electric motor units of electric motor units |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109861436A true CN109861436A (en) | 2019-06-07 |
Family
ID=66889502
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711247095.7A Pending CN109861436A (en) | 2017-11-30 | 2017-11-30 | The axial damping structure and electric motor units of electric motor units |
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| Country | Link |
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| CN (1) | CN109861436A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023145150A1 (en) * | 2022-01-27 | 2023-08-03 | マブチモーター株式会社 | Bearing unit and motor with reduction gear |
| CN117081311A (en) * | 2023-10-18 | 2023-11-17 | 宁波精成电机有限公司 | Axial buffer structure of rotor of window-shaking motor |
| WO2024111069A1 (en) * | 2022-11-22 | 2024-05-30 | マブチモーター株式会社 | Bearing unit and motor unit with speed reducer |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010174939A (en) * | 2009-01-28 | 2010-08-12 | Kayaba Ind Co Ltd | Worm reduction gear and electric power steering device |
| CN102109036A (en) * | 2009-12-23 | 2011-06-29 | 万都株式会社 | Reducer of electric power steering apparatus |
| KR20110073001A (en) * | 2009-12-23 | 2011-06-29 | 주식회사 만도 | Reducer of electronic power steering apparatus and electronic power steering apparatus using the same |
| KR101315666B1 (en) * | 2009-12-29 | 2013-10-08 | 주식회사 만도 | Reducer of Electronic Power Steering Apparatus and Electronic Power Steering Apparatus using The Same |
| CN204659806U (en) * | 2012-07-25 | 2015-09-23 | 南阳工业株式会社 | For the device for impact absorbing of the worm shaft of electric power steering |
| WO2016047189A1 (en) * | 2014-09-26 | 2016-03-31 | 日本精工株式会社 | Electric power steering device |
| CN207530655U (en) * | 2017-11-30 | 2018-06-22 | 马渊马达株式会社 | The axial damping structure and electric motor units of electric motor units |
-
2017
- 2017-11-30 CN CN201711247095.7A patent/CN109861436A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010174939A (en) * | 2009-01-28 | 2010-08-12 | Kayaba Ind Co Ltd | Worm reduction gear and electric power steering device |
| CN102109036A (en) * | 2009-12-23 | 2011-06-29 | 万都株式会社 | Reducer of electric power steering apparatus |
| KR20110073001A (en) * | 2009-12-23 | 2011-06-29 | 주식회사 만도 | Reducer of electronic power steering apparatus and electronic power steering apparatus using the same |
| KR101315666B1 (en) * | 2009-12-29 | 2013-10-08 | 주식회사 만도 | Reducer of Electronic Power Steering Apparatus and Electronic Power Steering Apparatus using The Same |
| CN204659806U (en) * | 2012-07-25 | 2015-09-23 | 南阳工业株式会社 | For the device for impact absorbing of the worm shaft of electric power steering |
| WO2016047189A1 (en) * | 2014-09-26 | 2016-03-31 | 日本精工株式会社 | Electric power steering device |
| CN207530655U (en) * | 2017-11-30 | 2018-06-22 | 马渊马达株式会社 | The axial damping structure and electric motor units of electric motor units |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023145150A1 (en) * | 2022-01-27 | 2023-08-03 | マブチモーター株式会社 | Bearing unit and motor with reduction gear |
| JP2023109382A (en) * | 2022-01-27 | 2023-08-08 | マブチモーター株式会社 | Bearing unit and motor with speed reducer |
| US11892071B2 (en) | 2022-01-27 | 2024-02-06 | Mabuchi Motor Co., Ltd. | Bearing unit and speed reducer-equipped motor |
| JP7522143B2 (en) | 2022-01-27 | 2024-07-24 | マブチモーター株式会社 | How to assemble the bearing unit to the gearbox |
| WO2024111069A1 (en) * | 2022-11-22 | 2024-05-30 | マブチモーター株式会社 | Bearing unit and motor unit with speed reducer |
| CN117081311A (en) * | 2023-10-18 | 2023-11-17 | 宁波精成电机有限公司 | Axial buffer structure of rotor of window-shaking motor |
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Application publication date: 20190607 |
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