CN104235329B - The seal construction of automatic transmission - Google Patents
The seal construction of automatic transmission Download PDFInfo
- Publication number
- CN104235329B CN104235329B CN201410275843.2A CN201410275843A CN104235329B CN 104235329 B CN104235329 B CN 104235329B CN 201410275843 A CN201410275843 A CN 201410275843A CN 104235329 B CN104235329 B CN 104235329B
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- CN
- China
- Prior art keywords
- lip
- labyrinth type
- wall portion
- lateral
- lateral lip
- 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.)
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/02—Gearboxes; Mounting gearing therein
- F16H57/029—Gearboxes; Mounting gearing therein characterised by means for sealing the gearboxes, e.g. to improve airtightness
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/04—Features relating to lubrication or cooling or heating
- F16H57/0467—Elements of gearings to be lubricated, cooled or heated
- F16H57/0469—Bearings or seals
- F16H57/0472—Seals
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
- F16J15/3204—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip
- F16J15/3208—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip provided with tension elements, e.g. elastic rings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/02—Gearboxes; Mounting gearing therein
- F16H2057/02039—Gearboxes for particular applications
- F16H2057/02043—Gearboxes for particular applications for vehicle transmissions
- F16H2057/02047—Automatic transmissions
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Sealing Using Fluids, Sealing Without Contact, And Removal Of Oil (AREA)
- Sealing With Elastic Sealing Lips (AREA)
- General Details Of Gearings (AREA)
- Sealing Devices (AREA)
- Sealing Of Bearings (AREA)
Abstract
The seal construction of a kind of automatic transmission, prevents the decline of sealing.nullThe abutting part (26) being located at internal side diameter is crimped the periphery (109a) being located at drive shaft (109) by the lip packing assembly (20) of the support holes (108) being supported on drive shaft (109) in change speed gear box (107)，And，Have from the radial outside of abutting part (26) to the axially extended lateral lip (28) of drive shaft (109)，Front end (28a) side of the lateral lip (28) that will be projected into the outside of support holes (108) insert the wall portion (113) of the internal side diameter of dust cover (110) can being integrally rotatably arranged in drive shaft (109) and the wall portion (112) of outside diameter chien shih its be crimped on wall portion (112)，Wherein，Lip packing assembly (20) is provided with the labyrinth type lip (29) from the radial outside of lateral lip (28) Yu lateral lip (28) equidirectional extension，The wall portion (112) making outside diameter is positioned between lateral lip (28) and labyrinth type lip (29).
Description
Technical field
The present invention relates to the seal construction of automatic transmission.
Background technology
In patent documentation 1, disclose the general structure around the differential gear of a kind of automatic transmission.
Patent documentation 1:(Japan) JP 2013-72524 publication
Fig. 4 (a)～(c) are the figures that the general structure around the differential gear 100 of automatic transmission is described,
Wherein, Fig. 4 (a) be the profile around differential gear 100, Fig. 4 (b) and Fig. 4 (c) be explanation
The figure of the lip packing assembly 20A being located between the support holes 108 of change speed gear box 107 and drive shaft 109.
Differential gear 100 possesses: be transfused to the little gear of the rotary driving force of electromotor via speed change gear
The side gear 102 of 101 left and right engaged with this little gear 101, little gear 101 and side gear 102 are received
It is contained in the case of differential 104 being formed as hollow form.
When automatic transmission is equipped on vehicle, insert the supporting of change speed gear box (differential carrier) 107
The left and right drive shaft 109 in hole 108 is chimeric with axle portion 103 spline of the cylindrical shape of side gear 102, input
Rotary driving force to differential gear 100 is transferred to left and right via little gear 101 and side gear 102 and drives
Axle 109.
Here, in the automatic transmission possessing existing differential gear 100, in left and right drive shaft 109
Periphery and the support holes 108 of change speed gear box 107 between be provided with lip packing assembly 20A so that at vehicle
The foreign body such as the muddy water of splashing or dust will not be between drive shaft 109 and support holes 108 during traveling etc.
Gap enters in change speed gear box 107.
As shown in Fig. 4 (b), the composition of lip packing assembly 20A possesses embedding with the inner circumferential of support holes 108
The metal endless member 21 closed and the rubber seal member 25 assembling this endless member 21.
Seal member 25 have be positioned at internal side diameter abutting part 26, from the radial outside of abutting part 26 to
The lateral lip 28 that the outside of bearing bore 108 extends, the main lip 26a of abutting part 26 utilizes from spring 30 effect
Active force is crimped on the periphery 109a of drive shaft 109.
Lateral lip 28 extends to the direction of principal axis of the center of rotation axle X of drive shaft 109 so that it is position, 28a side, front end
The wall portion 112 of outside diameter and the wall portion 113 of internal side diameter in the dust cover 110 being fixed in drive shaft 109
Between.
In this condition, the 28a side, front end of lateral lip 28 is pressed into the inner circumferential in the wall portion 112 of outside diameter, from
The radial direction of center of rotation axle X is seen, the 28a side, front end and the wall portion 112,113 that are set to lateral lip 28 overlap.
Therefore, by the wall portion 112,113 of dust cover 110 with insert between these wall portions 112,113
Lateral lip 28 forms labyrinth sealing, to suppress the foreign body such as muddy water or dust to enter the space S of internal side diameter.
Here, the 28a side, front end of lateral lip 28 can be subjected to displacement in the radial direction of center of rotation axle X, work as muddy water
When colliding Deng foreign body and lateral lip 28, due to impact force at this moment, the generation position, 28a side, front end of lateral lip 28
Move, between itself and wall portion 112, produce gap W (with reference to Fig. 4 (c)).
So, the solidss such as the sand contained in the foreign body such as muddy water of entrance gap W are sandwiched in sometimes
Between front end 28a and the wall portion 112 of dust cover 110 of lateral lip 28, reduce labyrinth sealed sealing.
Then, it is desirable to prevent the decline of labyrinth sealed sealing.
Summary of the invention
The present invention provides the seal construction of a kind of automatic transmission, is supported on rotation in automatic transmission case
The black box of the support holes of axle is located at outside described rotary shaft by being crimped by the sealing being located at internal side diameter
Week and arrange, and, have from axially extended to described rotary shaft of the radial outside of described sealing
Lateral lip, the front of the described lateral lip that will be projected into the outside of described support holes is inserted and can integrally rotatably be pacified
Between wall portion and the wall portion of outside diameter of the internal side diameter being contained in described rotary shaft, make the front end of described lateral lip
Side pressure is connected to the wall portion of outside diameter, wherein, be provided with the footpath from described lateral lip outside on described black box
The labyrinth type lip of side and the equidirectional extension of described lateral lip, make the wall site of described outside diameter in described lateral lip with
Between described labyrinth type lip.
According to the present invention, labyrinth type lip is positioned at the radial outside of lateral lip, from radially of the axis of rotation, and lateral lip
Being hidden in labyrinth type lip and do not expose, therefore, foreign body directly will not be interfered with lateral lip, the front of lateral lip
Will not be subjected to displacement.Thereby, it is possible to suitably prevent foreign body to be clipped in the front of lateral lip and the wall of outside diameter
Sealing is made to decline between portion.
It addition, utilize lateral lip, the wall portion of outside diameter, labyrinth type lip to form labyrinth at the radial outside of lateral lip
Formula seals, and therefore, from radial outside, the foreign body close to rotary shaft is difficult to arrive lateral lip.
Make between the front of lateral lip and the wall portion of outside diameter thereby, it is possible to suitably prevent foreign body to be clipped in
Sealing declines.
Accompanying drawing explanation
Fig. 1 (a), (b) are the figures of the seal construction that embodiment is described；
Fig. 2 (a)～(d) are the figures of the effect of the seal construction that embodiment is described；
Fig. 3 is the figure of the illustration stress in labyrinth type lip and the relation of the deflection in gap；
Fig. 4 (a)～(c) are the figures that the general structure around differential gear is described.
Symbol description
20,20A lip packing assembly (black box)
21 endless members
22 fitting portions
23 flange parts
25 seal members
26 abutting parts (sealing)
26b1 front end
26a1 abutting part
The main lip of 26a
26b, 26c dust excluder lips
27 base portions
28 lateral lips
28a front end
28b cardinal extremity
29 labyrinth type lips
29a front end
29b cardinal extremity
30 springs
100 differential gears
101 little gears
102 side gears
103 axle portions
104 cases of differential
107 change speed gear boxes (case)
108 support holes
109 drive shafts (rotary shaft)
109a periphery
109b is to portion
110 dust covers
111 connect wall
112 wall portions
112a bending section
112b inner peripheral surface
112c tabular surface
113 wall portions
231 stage portion
271 abutting parts
272 recesses
A region
D1 external diameter
S space
Sa gap
W gap
W1 width
W2 width
Wa gap
Wx gap
X center of rotation axle
Xb axis
Xa axis
Detailed description of the invention
Below, embodiments of the present invention are described.
Fig. 1 (a), (b) are the figures of the seal construction that embodiment is described, Fig. 1 (a) is enlarged representation
By the profile around the lip packing assembly 20 of the chimeric supporting of support holes 108 of change speed gear box 107, Fig. 1
B () is the profile of the region A of enlarged representation Fig. 1 (a).
As shown in Fig. 1 (a), the change speed gear box 107 of vehicle automatic transmission is provided with drive shaft 109
Support holes 108, embedded in this support holes 108 ring-type lip packing assembly 20 is installed.
Lip packing assembly 20 makes the abutting part 26 being located at its internal side diameter be crimped on and has inserted support holes 108
The periphery 109a of drive shaft 109, the gap of drive shaft 109 and support holes 108 is by this lip packing group
Part 20 seals.
As shown in Fig. 1 (b), lip packing assembly 20 possesses the metal chimeric with the inner circumferential of support holes 108
The seal member 25 of the endless member 21 of system and the rubber of this endless member 21 of assembling is constituted.
Endless member 21 has ring-type fitting portion 22 and from the lateral radially inner side in one end of this fitting portion 22
The discoideus flange part 23 extended, section is seen in generally L-shaped shape.
Being assembled with seal member 25 in flange part 23 side of endless member 21, this seal member 25 is at flange
The internal side diameter in portion 23 has abutting part 26.
This abutting part 26 possess dust excluder lips 26b of the internal side diameter being positioned at flange part 23,26c, be positioned at chimeric
The main lip 26a, main lip 26a of the internal side diameter in portion 22 are more positioned at the inner side of change speed gear box 107 than dust excluder lips 26b
(right side in figure).
Dust excluder lips 26b, 26c are in the axle side of the center of rotation axle X (with reference to Fig. 1 (a)) of drive shaft 109
To, it is positioned at side (right side in figure) and opposite side (left side in figure) across flange part 23 so that it is front end
26b1,26c1 abut with the periphery 109a of drive shaft 109.
The main lip 26a adjacent with dust excluder lips 26b prolongs to the direction (right direction in figure) leaving flange part 23
Stretch, utilize the active force from ring-type spring 30 effect to make to be positioned at the pointed abutting part 26a1 of internal side diameter
It is crimped on the periphery 109a of drive shaft 109.
Seal member 25 have cover flange part 23 with (left side in figure, the face of fitting portion 22 opposition side
Face) base portion 27, the ratio abutting part 26 at this base portion 27 is more provided with lateral lip 28 by the position of radial outside.
Here, be provided with the stage portion of the intensity for guaranteeing this flange part 23 at the internal side diameter of flange part 23
231, lateral lip 28 is from the outside being positioned against support holes 108 overlapped with this stage portion 231 of base portion 27
(left side in figure) extends.
Lateral lip 28 along axis X a parallel with center of rotation axle X extend substantially linearly time, from length
The half-way in degree direction starts to make 28a side, its front end to extend to be positioned at more outside by footpath than cardinal extremity 28b side
Side.Therefore, from center of rotation axle X axially, the outer diameter D of lateral lip 28 in the form of a ring 1 is (with reference to figure
1 (a)) start along with expanding towards its front end 28a from the half-way of length direction.
Here, in drive shaft 109, with lateral lip 28 be fixed with dust cover 110 to portion 109b.
On this dust cover 110, the wall portion 112 of outside diameter and the wall portion 113 of internal side diameter are at center of rotation axle X
Radially spaced apart interval and configure, from center of rotation axle X axially, these wall portions 112 in the form of a ring,
113 the end to 109b side, portion (left side in figure) is connected by ring-type connection wall 111.
In embodiments, the lateral lip 28 length L1 away from base portion 27 is set as, by drive shaft 109
Holding when the support holes 108 of change speed gear box 107,28a side, its front end is inserted into the wall portion 112 of outside diameter
And the length between the wall portion 113 of internal side diameter.And, in this condition, the front end 28a pressure of lateral lip 28
Enter the wall portion 112 of outside diameter, so that not producing gap between the wall portion 112 of lateral lip 28 and outside diameter.
Here, the direction that the front in the wall portion 112 of outside diameter becomes to leaving center of rotation axle X bends
Bending section 112a.Therefore, when drive shaft 109 being inserted the support holes 108 of change speed gear box 107, side
The front end 28a of lip 28 slides at this bending section 112a, and thus, the 28a side, front end of lateral lip 28 makes
Its external diameter diminishes while being inserted into (press-in) inner side to ring-type wall portion 112.
In embodiments, the wall portion 113 of the wall portion 112 of the internal side diameter of dust cover 110, outside diameter is utilized
The lateral lip 28 inserted between these wall portions 112,113 forms labyrinth sealing, by this labyrinth sealing,
Stop the space S of the internal side diameter of the foreign body entrance lateral lips 28 such as muddy water.
Radial outside at lateral lip 28 is provided with the labyrinth type lip 29 of extension equidirectional with lateral lip 28.This labyrinth
Formula lip 29 extends along axis X b parallel with center of rotation axle X, with above-mentioned endless member 21
Fitting portion 22 is coaxially disposed.
Length L1 identical with length L1 of lateral lip 28 away from a length of of base portion 27 of labyrinth type lip 29,
With when drive shaft 109 being supported on the support holes 108 of change speed gear box 107, the outside diameter of dust cover 110
Wall portion 112 be located at the radially spaced apart interval of center of rotation axle X and the lateral lip 28 that configures and labyrinth type lip
Between 29.
In this condition, at labyrinth type lip 29 and the wall portion 112 (tabular surface of the outside diameter of bending section 112a
Gap Wa it is able to ensure that, at the radial outside of lateral lip 28, by this lateral lip 28 and labyrinth type between 112c)
Lip 29, wall portion 112 form new labyrinth sealing.
At the outside diameter of base portion 27 of the cardinal extremity 29b of supporting labyrinth type lip 29, embedding to endless member 21
Side, conjunction portion 22 (right side in figure) extension is formed with the abutting part 271 with support holes 108, with this abutting part
Labyrinth type lip 29 side of 271 abuts to form the recess 272 caved in internal side diameter (center of rotation axle X side).
This recess 272 is located at the scope of the cardinal extremity 29b arriving labyrinth type lip 29 from the outside diameter of base portion 27
In, the wall thickness of the cardinal extremity 29b of labyrinth type lip 29 is formed as thinner than 29a side, front end.
Therefore, the 29a side, front end of labyrinth type lip 29 with cardinal extremity 29b for fulcrum in the footpath of center of rotation axle X
To movable, when the foreign bodies such as muddy water collide with labyrinth type lip 29 from the radial outside of center of rotation axle X,
The front end 29a of labyrinth type lip 29 laterally decreases and between the wall portion 112 of the dust cover 110 of internal side diameter
The direction displacement of gap Wa.
The effect of the seal construction of embodiment is described.
Fig. 2 (a)～(d) are the figures of the effect of the seal construction that embodiment is described, Fig. 2 (a) is table
Show that the 29a side, front end of labyrinth type lip 29 is in the figure of the state of the position (reference position) not being subjected to displacement,
Fig. 2 (b) is to represent the collision due to foreign bodies such as muddy water, the lateral internal diameter of front end 29a of labyrinth type lip 29
Side there occurs the figure of the state of displacement, when Fig. 2 (c) is the inner side that muddy water entrance labyrinth type lip 29 is described
Figure, Fig. 2 (d) is the enlarged drawing of the region A of Fig. 2 (a).
As shown in Fig. 2 (a), seal periphery 109a and the support holes of change speed gear box 107 of drive shaft 109
The lip packing assembly 20 in the gap of 108, by the front end 28a of the lateral lip 28 prominent to dust cover 110 side
Side is in the wall portion 113 of the outside internal side diameter inserting dust cover 110 of support holes 108 and the wall portion of outside diameter
Labyrinth sealing is formed between 112.
In this condition, the front end 28a of lateral lip 28 is pressed into the inner peripheral surface 112b in the wall portion 112 of outside diameter,
Foreign body (angstrom etc.) is prevented to enter the space S of internal side diameter of lateral lip 28.
It addition, in terms of the radial direction of center of rotation axle X, in the way of labyrinth type lip 29 and wall portion 112 coincidence
Arrange, outside the direction, footpath of lateral lip 28, this lateral lip 28, labyrinth type lip 29 and wall portion 112 are formed
New labyrinth sealing.
In this condition, the foreign body such as muddy water enters lip packing assembly from the radial outside of center of rotation axle X
During 20 side (in figure, reference arrow), owing to labyrinth type lip 29 is positioned at the radial outside of lateral lip 28, and side
Lip 28 is not exposed on the external in (outside direction, footpath), and therefore, the foreign body such as muddy water collides with labyrinth type lip 29.
So, labyrinth type lip 29 is formed as thin-walled due to its cardinal extremity 29b, therefore, and labyrinth type lip 29
To internal side diameter, (Fig. 2 (d), reference arrow a) displacement, with dust cover 110 because of impact force for 29a side, front end
Wall portion 112 gap Wx than the gap Wa before displacement become narrower (with reference to Fig. 2 (b)).
Thus, even if the foreign bodies such as muddy water rotate in the 29a side, front end of labyrinth type lip 29, and labyrinth type is passed through
Gap Wx between lip 29 and wall portion 112, because this gap Wx is than between before labyrinth type lip 29 displacement
Gap Wa is narrower, it is possible to suppression foreign body enters lateral lip 28 side.
Fig. 3 is illustration in the stress of the labyrinth type lip 29 of embodiment and labyrinth type lip 29 and wall portion
The figure of the relation in the gap between 112.
As it is shown on figure 3, when labyrinth type lip 29 non-applied stress (stress=0), 29, labyrinth type lip
In the position (with reference to Fig. 2 (a)) along axis X b, there are and between the wall portion 112 of internal side diameter
Gap Wa.
And, when labyrinth type lip 29 applied stress, deflection (the 29a side, front end of labyrinth type lip 29
Displacement) be increased dramatically, and the gap Wa between wall portion 112 drastically narrows.And, afterwards, with
The increase of stress, gap Wa progressively narrows.
Such as, in the case of the stress acting on labyrinth type lip 29 is x, the flexure of labyrinth type lip 29
Amount becomes than gap Wa originally more for Wb, the gap Wx between labyrinth type lip 29 and wall portion 112
Narrow gap (Wx=Wa-Wb).
In embodiments, even if the front end 29a of labyrinth type lip 29 is subjected to displacement, with labyrinth type lip 29
The mode do not collided with wall portion 112 sets length L1 and the width W2 of 29a side, front end of lateral lip, separately
Outward, in the stage that stress is little, in the way of the significantly displacement of 29a side, front end, set the width W1 of cardinal extremity 29b
(with reference to Fig. 2 (d)).
Additionally, in embodiments, the width W1 of cardinal extremity 29b and the width W2 of 29a side, front end sets
It is set at least W2 >=W1.
It addition, the 29a side, front end of labyrinth type lip 29 is not only in the direction close to wall portion 112, and from
Open wall portion 112 direction (Fig. 2 (d), reference arrow b) can also displacement, when labyrinth type lip 29
In the 29a lateral view of front end during arrow b direction displacement, and the gap Wa between wall portion 112 becomes big.
Therefore, even if muddy water enters between labyrinth type lip 29 and lateral lip 28 and is trapped in the vicinity of base portion 27,
The muddy water entered is after the downside of gravity direction is assembled, and the 29a side, front end of labyrinth type lip 29 is because of the mud assembled
The deadweight of water and displacement downwards, formed than the gap more roomy when labyrinth type lip 29 is positioned at reference position
Wy (with reference to Fig. 2 (c)).
Therefore, the muddy water of entrance will not be trapped between labyrinth type lip 29 and lateral lip 28 always, by fan
Downside (leaving the direction in the wall portion 112) displacement of the lateral gravity direction of front end 29a of palace formula lip 29, enters
The muddy water entered is discharged to outside between labyrinth type lip 29 and lateral lip 28.
Here, in the case of muddy water is detained, produce the foreign body of solid shape, this foreign body when muddy water solidifies
Sometimes it is clipped between the front end 28a of lateral lip 28 and wall portion 112.Drive shaft 109 is around rotation in this condition
Turn central shaft X (with reference to Fig. 1 (a)) rotate time, the front end 28a of lateral lip 28 with this drive shaft 109
The inner peripheral surface 112b in the wall portion 112 of the outside diameter rotated integrally slides, and therefore, is sandwiching the state of foreign body
Under, when the front end 28a of lateral lip 28 slides, the 28a side, front end of lateral lip 28 will be wiped off by foreign body and lose
Depressurization.
As mentioned above, it is possible to suitably prevent the muddy water entered be trapped in labyrinth type lip 29 and lateral lip 28 it
Between, therefore, it is possible to suitably prevent the state of affairs of loss of seal from occurring.
As it has been described above, in embodiments, it is provided that the seal construction of a kind of automatic transmission, by change speed gear box
The lip packing assembly 20 of support holes 108 supporting of the drive shaft 109 of 107 will be located at the abutting of internal side diameter
The periphery 109a of drive shaft 109 is located in portion 26 crimping, and, there is the radial outside from abutting part 26
To the axially extended lateral lip 28 of drive shaft 109, will be projected into the lateral lip 28 in the outside of support holes 108
28a side, front end insert the internal side diameter of dust cover 110 can being integrally rotatably arranged in drive shaft 109
Wall portion 113 and the wall portion 112 of outside diameter between, formed labyrinth sealing, and, make lateral lip 28
Front end 28a side pressure is connected to the wall portion 112 of outside diameter, wherein, arrange from side on lip packing assembly 20
The radial outside of lip 28, with the labyrinth type lip 29 of extension equidirectional with lateral lip 28, makes the wall portion 112 of outside diameter
Between lateral lip 28 and labyrinth type lip 29, the outside diameter at lateral lip 28 forms new labyrinth sealing.
When so constituting, labyrinth type lip 29 is positioned at outside the direction, footpath of lateral lip 28, from drive shaft 109
The radial direction of center of rotation axle X see, lateral lip 28 is hidden in labyrinth type lip 29 and does not exposes, therefore, different
Thing directly will not be interfered with lateral lip 28, and the 28a side, front end of lateral lip 28 will not be subjected to displacement.Thus, energy
Enough suitably prevent foreign body to be clipped in and lose close between the front end 28a of lateral lip 28 and the wall portion 112 of outside diameter
Feng Xing.
Thus, when vehicle travels, the dust cover 110 and the lateral lip 28 that rotate integrally with drive shaft 109 are fitted
Locality prevents from sandwiching the shape of foreign body between the front end 28a and the inner peripheral surface 112b in wall portion 112 of lateral lip 28
Rotate against under state.
Therefore, in inner circumferential the front end 28a of lateral lip 28 sandwiches foreign body between itself and wall portion 112
When sliding on the 112b of face, it is possible to suitably prevent the 28a side, front end of lateral lip 28 from being wiped off by foreign body and sealing
The generation of the state of affairs that property completely loses etc.
It addition, when the sealing of lateral lip 28 completely loses, the foreign body entered in inner space S presss from both sides sometimes
Between the main lip 26a and dust excluder lips 26b, 26c and the periphery 109a of drive shaft 109 of abutting part 26.
So, by the rotation of drive shaft 109, main lip 26a and dust excluder lips 26b, 26c in drive shaft 109
Periphery 109a when sliding, the foreign body that main lip 26a and dust excluder lips 26b, 26c are likely sandwiched into is wiped off
And loss of seal.
According to said structure, by suitably preventing the some lost sealing at lateral lip 28, it is possible to prevent
Foreign body enters main lip 26a and dust excluder lips 26b, 26c side, thus, it is also possible to suitably prevent main lip 26a
And this some lost sealing of dust excluder lips 26b, 26c.
Thereby, it is possible to suitably prevent the sealing of the foreign object damage lip packing assemblies 20 such as muddy water and enter change
In speed case 107.It addition, the sealing of lip packing assembly 20 will not be substantially damaged because the time passes through,
Therefore, it is possible to suitably prevent lubricating oil in variator 107 by this part of lip packing assembly 20 to
The External leakage of change speed gear box 107 goes out.
Being configured to, the wall thickness of the cardinal extremity 29b side of labyrinth type lip 29 is formed as thinner than 29a side, front end.
When so constituting, the easy displacement in 29a side, front end of labyrinth type lip 29, therefore, when foreign body is from footpath side
When colliding with labyrinth type lip 29 laterally, it is inside that the front end 29a lateral approach of labyrinth type lip 29 is positioned at footpath
The direction displacement in the wall portion 112 of the outside diameter of side so that it is and the gap Wa between the wall portion 112 of outside diameter
Narrow.Thus, the foreign body intrusion to lateral lip 28 side is more difficult, therefore, it is possible to the most suitably prevent
Only foreign body is clipped between 28a side, front end and the wall portion 112 of outside diameter of lateral lip 28.
Therefore, it is possible to suitably prevent the sealing of lip packing assembly 20 from losing.
Lip packing assembly 20 is by fitting portion 22 He of the chimeric endless member 21 being supported on support holes 108
The seal member 25 assembling this endless member 21 is constituted, above-mentioned labyrinth type lip 29 along with drive shaft 109
Parallel for center of rotation axle X axis X b extend, and, be positioned on the extended line of fitting portion 22,
The radial direction of center of rotation axle X, labyrinth type lip 29 be located at on the periphery coaxial line of fitting portion 22.
When so constituting, owing to being provided with labyrinth type lip 29, so need not increase lip packing assembly 20
And the external diameter of support holes 108, therefore, become the supporting being supported on automatic transmission by merely displacement
The existing lip packing assembly in hole 108, can suitably prevent the seal construction that sealing reduces.Separately
Outward, the external diameter of existing lip packing assembly is not changed, it becomes possible to greatly guarantee the flexure of labyrinth type lip 29
Amount.
It is configured to, in seal member 25, at the base portion 27 of the cardinal extremity 29b of supporting labyrinth type lip 29
Periphery, forms the recess 272 to internal side diameter depression, at the direction of principal axis of center of rotation axle X, this recess 272
It is located in the range of over to the cardinal extremity 29b of labyrinth type lip 29, by the cardinal extremity 29b's of labyrinth type lip 29
Wall thickness is formed as thinner than 29a side, front end.
According to such structure, by suitably changing the radial and axial recess of center of rotation axle X
The degree of depth of 2722 and scope (length), it is possible to suitably adjust the pliable degree (front end of labyrinth type lip 29
The easness of the displacement of 29a side).
It is configured to, in the periphery of seal member 25, at the axial of center of rotation axle X and labyrinth type lip
The opposition side of 29, is provided with the abutting part 271 with support holes 108, labyrinth type lip 29, abutting part 271,
The fitting portion 22 of endless member 21 is positioned at coaxial position in axis X b parallel with center of rotation axle X
Put.
When so constituting, the cardinal extremity 29b side of labyrinth type lip 29 is supported on via the abutting part 271 of rubber
Metal endless member 21.
So, when the labyrinth type lip 29 affording stress is subjected to displacement, the abutting part 271 of rubber
The easness of the flexible displacement contributing to labyrinth type lip 29.
Thus, with the cardinal extremity 29b side directly being supported labyrinth type lip 29 by metal endless member 21
Situation compare, the easy displacement of labyrinth type lip 29, and, the speed of the displacement of labyrinth type lip 29 accelerates,
Can the most suitably prevent foreign body from entering lateral lip 28 side.
Claims (2)
1. a seal construction for automatic transmission, in automatic transmission case, is supported on propping up of rotary shaft
The black box of bearing bore by by be located at internal side diameter sealing crimp be located at described rotary shaft periphery and
Arrange, and, have from the radial outside of described sealing to the axially extended lateral lip of described rotary shaft,
The front of the described lateral lip that will be projected into the outside of described support holes is inserted and can integrally rotatably be pacified
Between wall portion and the wall portion of outside diameter of the internal side diameter being contained in described rotary shaft, make the front end of described lateral lip
Side pressure is connected to the wall portion of outside diameter, it is characterised in that
Described black box is provided with from the radial outside of described lateral lip and the equidirectional extension of described lateral lip
Labyrinth type lip, make the wall site of described outside diameter between described lateral lip and described labyrinth type lip,
The wall thickness of the base end side of described labyrinth type lip is formed as thinner than front.
2. the seal construction of automatic transmission as claimed in claim 1, it is characterised in that
Described black box is by the chimeric endless member being supported on described support holes and is assembled with this annulus
The seal member of part is constituted,
Described radially of the axis of rotation, described labyrinth type lip is located at the periphery coaxial line with described endless member
On.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2013-130140 | 2013-06-21 | ||
| JP2013130140A JP5748801B2 (en) | 2013-06-21 | 2013-06-21 | Seal structure in automatic transmission |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104235329A CN104235329A (en) | 2014-12-24 |
| CN104235329B true CN104235329B (en) | 2016-10-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410275843.2A Active CN104235329B (en) | 2013-06-21 | 2014-06-19 | The seal construction of automatic transmission |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP5748801B2 (en) |
| KR (1) | KR101577899B1 (en) |
| CN (1) | CN104235329B (en) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2949972B1 (en) * | 2014-05-26 | 2017-03-15 | Carl Freudenberg KG | Cassette seal |
| JP6168487B1 (en) | 2015-12-04 | 2017-07-26 | Nok株式会社 | Sealing structure using annular pocket and sealing device |
| CN105402381A (en) * | 2015-12-14 | 2016-03-16 | 南京安维士传动技术股份有限公司 | Dual-ring labyrinth seal structure for gearbox |
| CN105952875B (en) * | 2016-07-06 | 2018-09-14 | 中国神华能源股份有限公司 | For the rotary packing ring of gear-box and the sealing structure of gear-box |
| CN106737152A (en) * | 2016-12-23 | 2017-05-31 | 泉州智信专利技术开发有限公司 | It is a kind of with dust-proof bistrique and sanding machine |
| JP6565948B2 (en) * | 2017-02-02 | 2019-08-28 | マツダ株式会社 | Connection structure between differential gear and drive shaft, and vehicle manufacturing method |
| US11813729B2 (en) | 2018-05-14 | 2023-11-14 | Black & Decker Inc. | Power tool with partition assembly between transmission and motor |
| US10971966B2 (en) | 2018-05-14 | 2021-04-06 | Black & Decker Inc. | Power tool with partition assembly between transmission and motor |
| US11731779B2 (en) | 2020-06-01 | 2023-08-22 | Textron Innovations Inc. | Drivetrain for an aircraft including gearbox with coaxial input and output shafts |
| US11420760B2 (en) * | 2020-06-29 | 2022-08-23 | Textron Innovations Inc. | Sealed coaxial input and output shafts |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5540252U (en) * | 1978-09-08 | 1980-03-14 | ||
| JP2804517B2 (en) * | 1989-06-15 | 1998-09-30 | エヌオーケー株式会社 | Sleeve with slinger for oil seal and seal assembly thereof |
| JPH09144767A (en) * | 1995-11-24 | 1997-06-03 | Koyo Seiko Co Ltd | Sealing device of bearing |
| US6485185B1 (en) * | 1999-08-16 | 2002-11-26 | Roller Bearing Industries, Inc. | Bearing seal |
| JP4275337B2 (en) * | 2001-11-29 | 2009-06-10 | ジヤトコ株式会社 | transmission |
| DE102005016705A1 (en) * | 2005-04-12 | 2006-10-19 | Schaeffler Kg | Cartridge seal for rail vehicle, has seal carrier ring with elastomer seal, and centrifuge ring, where height constant axial gap is provided between short profile side of simultaneously rotatable centrifuge rings and ring surface of seal |
| JP2007040502A (en) * | 2005-08-05 | 2007-02-15 | Toyota Industries Corp | Rotating shaft supporting structure in industrial vehicle |
| US8342535B2 (en) * | 2007-11-20 | 2013-01-01 | The Timken Company | Non-contact labyrinth seal assembly and method of construction thereof |
| JP5214958B2 (en) * | 2007-12-11 | 2013-06-19 | 株式会社ジェイテクト | SEALING DEVICE FOR ROLLING BEARING DEVICE AND ROLLING BEARING DEVICE HAVING THE SEALING DEVICE |
| JP5208996B2 (en) * | 2010-05-24 | 2013-06-12 | ジヤトコ株式会社 | Rotating body support structure |
| JP5404727B2 (en) * | 2011-09-28 | 2014-02-05 | ジヤトコ株式会社 | Seal structure with differential |
-
2013
- 2013-06-21 JP JP2013130140A patent/JP5748801B2/en active Active
-
2014
- 2014-05-26 KR KR1020140062930A patent/KR101577899B1/en active IP Right Grant
- 2014-06-19 CN CN201410275843.2A patent/CN104235329B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| JP5748801B2 (en) | 2015-07-15 |
| JP2015004409A (en) | 2015-01-08 |
| KR20140148301A (en) | 2014-12-31 |
| CN104235329A (en) | 2014-12-24 |
| KR101577899B1 (en) | 2015-12-15 |
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