CN101117984A - Multi-plate clutch device - Google Patents

Multi-plate clutch device Download PDF

Info

Publication number
CN101117984A
CN101117984A CNA2007101397244A CN200710139724A CN101117984A CN 101117984 A CN101117984 A CN 101117984A CN A2007101397244 A CNA2007101397244 A CN A2007101397244A CN 200710139724 A CN200710139724 A CN 200710139724A CN 101117984 A CN101117984 A CN 101117984A
Authority
CN
China
Prior art keywords
clutch
plate
groove
friction means
abutting part
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.)
Pending
Application number
CNA2007101397244A
Other languages
Chinese (zh)
Inventor
熊冈朝雄
平井启司
铃木裕介
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
FCC Co Ltd
Original Assignee
FCC Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by FCC Co Ltd filed Critical FCC Co Ltd
Publication of CN101117984A publication Critical patent/CN101117984A/en
Pending legal-status Critical Current

Links

Images

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16DCOUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D13/00Friction clutches
    • F16D13/58Details
    • F16D13/60Clutching elements
    • F16D13/64Clutch-plates; Clutch-lamellae
    • F16D13/648Clutch-plates; Clutch-lamellae for clutches with multiple lamellae
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16DCOUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D13/00Friction clutches
    • F16D13/58Details
    • F16D13/74Features relating to lubrication
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16DCOUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D23/00Details of mechanically-actuated clutches not specific for one distinct type
    • F16D23/12Mechanical clutch-actuating mechanisms arranged outside the clutch as such
    • F16D23/14Clutch-actuating sleeves or bearings; Actuating members directly connected to clutch-actuating sleeves or bearings

Abstract

The invention provides a multiple disk clutch apparatus, which can improve the fume exhausting effect and prevent that the resistance moment of the clutch is increased after a long application period. The apparatus comprises: a plurality of approximately annular clutch disc connected with the input side of a power train, i.e. engine side; a plurality of approximately annular clutch board alternately laminated with the clutch disc and connected with the output side of a power train, i.e. wheel side; a friction part rigidly adhered on the adjacent surface of the clutch disc facing to the clutch board; a joint part resisted against the surface of the clutch, which is a projection extending radially on the surface of the friction part pressed by a formation mould; and a groove extending radially formed by the formation mould between the adjacent joint parts on the surface of the friction part, which is characterized in that the friction part has a width concave portion disposed in an equal distance along the circular direction, in which the joint part and the groove is coplanar. The circumferential width of respective wide concave portion is more than the circumferential width of the groove.

Description

Multi-plate clutch device
Technical field
The present invention relates to a kind of multi-plate clutch device, this multi-plate clutch device comprises the input side with Power Train, promptly start a plurality of general toroidal that pusher side links to each other clutch disk and with the outlet side of Power Train, take turns promptly that side links to each other and the clutch plate of a plurality of general toroidal of arranging with described clutch disk alternatively laminated.
Background technique
Usually, multi-plate clutch device is used for the vehicle such as motorcycle, it is intended to that driving force with motor is passed to transmission device or driving wheel or from this cut-out driving force, and comprise input side with Power Train, promptly start a plurality of general toroidal that pusher side links to each other clutch disk and with the outlet side of Power Train, take turns promptly that side (driven wheel side) links to each other and the clutch plate of a plurality of general toroidal of arranging with the clutch disk alternatively laminated.
The friction means rigidity that forms by for example vegetable cork stick to clutch disk on the surface of the adjacently situated surfaces of clutch plate, and be formed with the abutting part that forms the projection of radially extending by forming die punching press on the surface of friction means, and this abutting part is suitable for the surface against clutch plate.
Described friction means is formed with between abutting part the groove that radially extends along clutch disk, thereby described groove can have the function of oil drain passage, is used for staying oil between clutch disk and the clutch plate from this discharging.Proposed a kind of traditional oil drain passage that forms in abutting part, it has the degree of depth more shallow than groove (referring to No. 146018/1989 communique of Japanese Patent Application Laid-Open).In such multi-plate clutch device, be new and each oil drain passage when keeping enough deeply at this multi-plate clutch device, also can be except from the groove oil extraction from shallow oil drain passage oil extraction.
The problem that remains the present invention's solution
Yet according to the multi-plate clutch device of prior art, the shallow oil drain passage that forms in abutting part was worn after the predetermined spreadable life of clutch, thereby the oil extraction effect also reduces.The reduction of oil extraction effect causes, and when clutch disk and clutch plate unclamp under the situation that clutch breaks away from, leaves oil between this clutch disk and clutch plate, thereby because the viscosity of oil, residual oil can cause resisting moment to increase.
Summary of the invention
Therefore the object of the present invention is to provide a kind of multi-plate clutch device, it can improve the oil extraction effect, thereby prevents to use the back resisting moment to increase for a long time at clutch device.
Realize the means of this purpose
In order to realize above purpose of the present invention, a kind of multi-plate clutch device is provided according to a first aspect of the invention, this multi-plate clutch device comprises: with the input side of Power Train, promptly start the clutch disk of the continuous a plurality of general toroidal of pusher side; With the outlet side of Power Train, take turns promptly that side links to each other and the clutch plate of a plurality of general toroidal of arranging with described clutch disk alternatively laminated; Friction means, described friction means rigidity stick to described clutch disk on the surface of the adjacently situated surfaces of described clutch plate, and be suitable for contacting with the surface pressure of described clutch plate or unclamping from this surface; Abutting part, described abutting part are stamped by forming die and form the projection of radially extending on the surfaces of described friction means, and are suitable for the surface against described clutch plate; And the groove that radially extends, when forming described abutting part, on the surface at described friction means between the adjacent abutting part, form described groove by described forming die, this multi-plate clutch device is characterised in that: described friction means have along the described abutting part of circumferentially arranging equidistantly and with the wide recess of described groove coplane, the circumferential width of each wide recess is all greater than the circumferential width of described groove.
According to a second aspect of the invention, preferably, described wide recess is circumferentially arranged basically equidistantly along described friction means.
According to a third aspect of the invention we, further preferably, described groove is arranged with respect to described clutch disk spirality.
The invention effect
According to a first aspect of the invention, since friction means have along the abutting part of circumferentially arranging equidistantly and with groove coplane and circumferential width all greater than the wide recess of groove, therefore can improve the oil extraction effect, thereby prevent to use the back resisting moment to increase for a long time at clutch device.
According to a second aspect of the invention, because therefore wide recess can either realize that the even contact between friction means and the clutch plate can realize even oil extraction again along circumferentially the arranging equidistantly basically of friction means.
According to a third aspect of the invention we, owing to groove is arranged with respect to the clutch disk spirality, thereby can realize carrying out oil extraction along a direction according to the rotation of clutch disk.
Description of drawings
Will know other advantages of the present invention and feature from the following description and the appended claims in conjunction with the accompanying drawings, wherein:
Fig. 1 is the longitudinal section of multi-plate clutch device of the present invention;
Fig. 2 is the clutch plate of expression multi-plate clutch device and the stereogram of clutch disk;
Fig. 3 is the planimetric map of expression clutch disk;
Fig. 4 is that the line IV-IV along Fig. 3 cuts open the sectional drawing of getting;
Fig. 5 is that the line V-V along Fig. 3 cuts open the sectional drawing of getting;
Fig. 6 is that the line VI-VI along Fig. 3 cuts open the sectional drawing of getting;
Fig. 7 is that expression is used to form the forming die of friction means of clutch disk and the schematic cross sectional view that is not formed with the part of wide recess;
Fig. 8 is that expression is used to form the forming die of friction means of clutch disk and the schematic cross sectional view that is formed with the part of wide recess;
Fig. 9 is the plotted curve of the relation between expression liner area and the resisting moment; And
Figure 10 is the planimetric map of the clutch disk of another mode of execution of the present invention.
Embodiment
Hereinafter with reference to accompanying drawing preferred implementation of the present invention is described.
The multi-plate clutch device of the preferred embodiment for the present invention is installed on vehicle or the motorcycle, randomly the driving force of motor or transmission device is passed to driving wheel or from this cut-out driving force.As shown in Figure 1, multi-plate clutch device of the present invention mainly comprises: clutch housing 2, and it has the formation input side, promptly starts the gear 1 of pusher side; With the formation outlet side, promptly take turns 3 clutch component 4 that link to each other of side; Be installed in pressing plate 5 on this clutch component at the right-hand member (according to Fig. 1) of clutch component 4; The clutch disk 6 that links to each other with clutch housing 2; And the clutch plate 7 that links to each other with clutch component 4.
Gear 1 links to each other with clutch housing 2 around axle 3 rotations and via rivet 8 etc. by the driving force (rotating force) transmitted from motor.Clutch housing 2 is at the tubular case member of its right-end openings and is provided with a plurality of driving clutch disks 6 on the side face within it.Each clutch disk 6 all forms the plate of general toroidal, and is assemblied on the clutch housing 2, thereby clutch disk can be rotated with clutch housing 2.
Clutch component 4 forms at the tubular case member of its right-end openings and is suitable for being accommodated in the clutch housing 2.Axle 3 passes the central and coupled via splined of clutch component 4, thereby rotates by clutch component 4.Be formed with axially extended spline on the outer circumferential face of clutch component 4, clutch plate 7 is assemblied on the described spline.
These clutch plates 7 and clutch disk 6 arranged alternate make the clutch disk 6 that adjoins each other and clutch plate 7 press contacts or unclamp each other each other.That is to say that clutch disk 6 and clutch plate 7 all can endwisely slip, thereby, make the rotating force of clutch housing 2 can pass to clutch component 4 and axle 3 when by pressing plate 5 their press contacts each other when left direction (according to Fig. 1) promotes.When removing the pressure of pressing plate 5, they also unclamp each other conversely speaking,, thereby clutch component 4 can not follow the rotation of clutch housing 2, and therefore power can not be passed to axle 3.
As shown in Figure 2, each clutch disk 6 on the apparent surface of clutch plate 7, rigidity is stained with the friction means of being made by the vegetable cork that for example has big surface friction drag 10.Groove 10b that the exposed surface of friction means 10 is formed with the abutting part 10a that all has projection profiles, radially extend between adjacent abutting part 10a and the wide recess 11 that plays specific oil extraction channeling (below can more detailed description).Press contacts between clutch disk 6 and the clutch plate 7 can be by abutting part 10a and clutch plate 7 the surface contact realization.
In this case, " the unclamping " that it should be noted that clutch disk 6 and clutch plate 7 be meant wherein lose press contacts and clutch component 4 therefore do not follow clutch housing 2 rotation state (promptly, the state that clutch disk 6 slides on clutch plate 7), can not be gapped thereby between clutch disk 6 and the clutch plate 7.
Pressing plate 5 has the roughly profile of plate-like, thereby closes the opening (right-hand member) of clutch component 4, and is pushed towards left direction by clutch spring " S " in the ordinary course of things.That is to say, realize promotion pressing plate 5 by being arranged in to stretch out and extend through the boss part 4b of pressing plate 5 and be screwed in clutch spring " S " between the head of the clutch bolt " B " the boss part 4b from clutch component 4.
Thereby the peripheral portion 5a of pressing plate 5 is against the clutch plate 7 that is positioned at least significant place, thus clutch disk 6 and clutch plate 7 press contacts by clutch spring " S " and each other in the ordinary course of things.Therefore, clutch housing 2 and clutch component 4 keep coupled condition in the ordinary course of things, thereby when rotating force was transfused to gear 1, gear 1 can make axle 3 rotations.
When the driver of vehicle operation so that during towards right direction movable platen 5, the pressure contact force between clutch disk 6 and the clutch plate 7 can be disengaged thereby mobile putter 9 overcomes the Driving force of clutch spring " S " towards right direction (according to Fig. 1).When the pressure contact force between clutch disk 6 and the clutch plate 7 is disengaged, input to gear 1 and thereby the rotating force that inputs to clutch housing 2 be cut off, therefore can not pass to axle 3.That is to say, axial motion that can be by push rod 9, and therefore the axial motion by pressing plate 5 can realize the press contacts between clutch disk 6 and the clutch plate 7 or unclamp.
Pressing plate 5 is formed with the some retainer 5b that stretch out from it, is used to limit the rotation of pressing plate 5 with respect to clutch component 4.Each retainer 5b has projection profiles, and is assemblied among the groove 4a on the inner peripheral surface that is formed on clutch component 4, with the relative rotation between restriction pressing plate 5 and the clutch component 4.
Extremely shown in Figure 6 as Fig. 3, each clutch disk 6 comprises the friction means 10 on the apparent surface that core components " W " that metal or plastics are made and rigidity stick to core components " W ", and is formed with abutting part 10a, groove 10b and wide recess 11 on the exposed surface of each friction means 10.Each clutch disk 6 following manufacturing: at first any suitable bonding is coated on the apparent surface of core components " W ", smooth friction means 10 is sticked on each surface of core components " W " then.After tackiness agent solidifies, as shown in Figure 7 and Figure 8, forming die " P " is pressed on each surface of friction means 10.Like this, the recess Pa that abutting part 10a can pass through forming die " P " forms, and the teat Pb that groove 10b can pass through forming die " P " forms.
Some recess Pa in the pre-position that is arranged in forming die " P " embed filler " N " (Fig. 8), make filler " N " exposed surface Na basically with the end face coplane of the adjacent teat Pb of forming die " P ".Therefore, can form wide recess 11, the width of this wide recess is much larger than the width of groove 10b and as specific oil drain passage.The position of filler " N " is specified to and makes their circumferentially equidistant intervals distributions of turning up the soil basically along friction means 10.
Because the bottom surface that friction means 10 is formed with bottom surface and groove 10b is the wide recess 11 of coplane basically, between the spreadable life of multi-plate clutch device, oil is except from groove 10b discharging, certainly also leniently recess 11 discharge.Therefore, can significantly improve the oil extraction effect, thereby prevent that resisting moment increases after the long-term use of multiple-disk clutch.
Only, just can utilize it to form wide recess 11 by adding filler " N " in the pre-position of traditional forming die " P " and this forming die " P " being improved a little.In addition, because wide recess 11, also can be realized even press contacts and the evenly oil extraction between friction means 10 and the clutch plate 7 along circumferentially the equidistantly distributing basically of friction means 10.
Below by one embodiment of the present invention and a comparative example are compared improvement effect of the present invention is described.
Table 1 utilizes on friction means 10 moderate distance ground and forms the comparative example of 48 abutting part 10a and form 8 wide recesses (promptly in friction means 10, removed 8 abutting part 10a) embodiment of the present invention, show experimental result about liner area (the press contacts area between friction means 10 and the clutch plate 7) and resisting moment.
Table 1
The abutting part number Wide recess number Groove width [mm] Liner internal diameter [mm] Liner external diameter [mm] Liner area [mm 2] Resisting moment [Nm]
The comparative example 48 0 1.4 88.5 100.5 1377 0.66
Present embodiment 40 8 1.4 88.5 100.5 1148 0.50
Can be clear from table 1, though the liner area has still reduced 16.6%, the clutch disk of present embodiment can make resisting moment descend 24.2%.
Experimentize by the quantity that changes the abutting part that forms in the friction means 10 and wide recess and to study relation between liner area and the resisting moment.Experimental result such as table 2 and shown in Figure 9.
Table 2
The abutting part number Wide recess number Groove width [mm] Liner internal diameter [mm] Liner external diameter [mm] Liner area [mm 2] Resisting moment [Nm]
12 4 1.4 88.5 100.5 1234 0.590
12 2 88.5 100.5 1191 0.580
12 3 88.5 100.5 1119 0.560
42 6 1.4 88.5 100.5 1205 0.545
48 1.2 88.5 100.5 1237 0.555
54 1 88.5 100.5 1278 0.575
40 8 1.4 88.5 100.5 1148 0.500
46 1.2 88.5 100.5 1185 0.520
52 1 88.5 100.5 1231 0.543
30 10 1 88.5 100.5 1155 0.515
40 1 88.5 100.5 1184 0.525
48 12 1 88.5 100.5 1136 0.530
60 1.4 88.5 100.5 1276 0.590
Can be clear from table 2 and Fig. 9, when having identical liner area, for reducing resisting moment, the clutch disk with 6 to 10 wide recesses is more effective than other clutch disks.
Although described the present invention with reference to preferred implementation, the invention is not restricted to illustrated explanation.For example, as shown in figure 10, can arrange groove 10b ' and wide recess 11 ' with respect to clutch disk 6 spirality, promptly they can tilt with respect to the radius of clutch disk 6.This layout can be along a sense of rotation (the just changeing) oil extraction of clutch disk 6.That is to say that in this case, oil can effectively be discharged when clutch disk 6 rotates in the counterclockwise direction.
In multi-plate clutch device of the present invention, except that vegetable cork, also can use any friction material, for example used paper substrate or rubber-based friction material in the traditional wet multi-plate clutch device.Multi-plate clutch device of the present invention can be applicable to motorcycle, automobile, three-wheel or four-wheel wagon or any other general dynamic machinery.
Industrial applicability
The present invention can be used for any other multiple-disk clutch except the multiple-disk clutch described in this specification, although they have different structures or additional function.

Claims (3)

1. multi-plate clutch device, this multi-plate clutch device comprises:
With the input side of Power Train, promptly start the clutch disk (6) of the continuous a plurality of general toroidal of pusher side;
With the outlet side of Power Train, take turns promptly that side links to each other and the clutch plate (7) of a plurality of general toroidal of arranging with described clutch disk (6) alternatively laminated;
Friction means (10), described friction means rigidity stick to described clutch disk (6) on the surface of the adjacently situated surfaces of described clutch plate (7), and be suitable for carrying out press contacts with the surface of described clutch plate (7) or unclamping with this surface;
Abutting part (10a), described abutting part are stamped by forming die (P) and form the projection of radially extending on the surfaces of described friction means (10), and are suitable for the surface against described clutch plate; And
Radially the groove of Yan Shening (10b) when forming described abutting part (10a), forms described groove by described forming die (P) on the surface of described friction means (10) between adjacent abutting part (10a);
This multi-plate clutch device is characterised in that:
Described friction means (10) have along the described abutting part of circumferentially arranging equidistantly (10a) and with the wide recess (11) of described groove (10b) coplane, the circumferential width of each wide recess is all greater than the circumferential width of described groove (10b).
2. multi-plate clutch device according to claim 1, wherein, described wide recess (11) is circumferentially arranged basically equidistantly along described friction means (10).
3. multi-plate clutch device according to claim 1 and 2, wherein, described groove (10b) is arranged with respect to described clutch disk (6) spirality.
CNA2007101397244A 2006-08-02 2007-07-27 Multi-plate clutch device Pending CN101117984A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2006211206A JP2008038963A (en) 2006-08-02 2006-08-02 Multiple disk type clutch device
JP2006211206 2006-08-02

Publications (1)

Publication Number Publication Date
CN101117984A true CN101117984A (en) 2008-02-06

Family

ID=39054213

Family Applications (1)

Application Number Title Priority Date Filing Date
CNA2007101397244A Pending CN101117984A (en) 2006-08-02 2007-07-27 Multi-plate clutch device

Country Status (2)

Country Link
JP (1) JP2008038963A (en)
CN (1) CN101117984A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111306214A (en) * 2018-12-11 2020-06-19 株式会社捷太格特 Clutch device
CN115210484A (en) * 2020-05-11 2022-10-18 舍弗勒技术股份两合公司 Multi-disk clutch device having spring plate elements acting independently of one another for coupling two sub-disks to a driven shaft

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5776310B2 (en) 2011-04-27 2015-09-09 株式会社エフ・シー・シー Wet friction plate
JP7071853B2 (en) * 2018-03-19 2022-05-19 株式会社Ijtt Wet multi-plate clutch and transfer
JP6673602B2 (en) * 2018-05-31 2020-03-25 株式会社エフ・シー・シー Wet friction plate and wet-type multi-plate clutch device having the same wet friction plate
JP6685069B1 (en) * 2018-11-28 2020-04-22 株式会社エフ・シー・シー Wet friction plate, wet multi-plate clutch device equipped with the same, and method of manufacturing wet friction plate

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6266032U (en) * 1985-10-16 1987-04-24
JPH0625712Y2 (en) * 1988-03-30 1994-07-06 本田技研工業株式会社 Wet multi-plate clutch
JPH0419425A (en) * 1990-05-14 1992-01-23 Nissan Motor Co Ltd Wet clutch
JPH0510354A (en) * 1991-07-04 1993-01-19 Akebono Brake Res & Dev Center Ltd Wet friction material
JPH08178019A (en) * 1994-12-21 1996-07-12 Zexel Corp Thrust washer for torque-sensitive differential gear device
JP4593032B2 (en) * 2001-08-10 2010-12-08 アイシン化工株式会社 Wet friction member

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111306214A (en) * 2018-12-11 2020-06-19 株式会社捷太格特 Clutch device
CN115210484A (en) * 2020-05-11 2022-10-18 舍弗勒技术股份两合公司 Multi-disk clutch device having spring plate elements acting independently of one another for coupling two sub-disks to a driven shaft
CN115210484B (en) * 2020-05-11 2024-02-27 舍弗勒技术股份两合公司 Multi-disk clutch device with spring plate units for coupling two sub-disks to a driven shaft, which spring plate units act independently of one another

Also Published As

Publication number Publication date
JP2008038963A (en) 2008-02-21

Similar Documents

Publication Publication Date Title
CN101117984A (en) Multi-plate clutch device
DE69933745T2 (en) Multi-disc friction device with controllable forced lubrication
EP2037142A2 (en) Power transmitting apparatus
US20060054448A1 (en) Clutch hub
EP1972819A1 (en) Power transmission device
CN104919203B (en) Multi-plate clutch device
CN104791395B (en) wet clutch and vehicle
CN105937560B (en) Friction plate and wet-type multi-plate clutch with friction plate
US6585096B2 (en) Friction plate and multi-plate clutch using friction plates
JP2017155883A (en) Power transmission device
WO2011072634A1 (en) Outer plate carrier
JP6576349B2 (en) Coupling for AWD cars
KR101985512B1 (en) Parking brake device for construction vehicle
JP6879994B2 (en) Friction type shift element for vehicle transmission
CN100396948C (en) Method for manufacturing a power transmitting apparatus
KR20150089929A (en) Locking differential having preload spring wear pads
JP2023001223A (en) power transmission device
CN106949167A (en) Shaping and the method for machining clutch hub
JP2022000594A (en) Friction element for friction type shift element for vehicular transmission
EP2724046A2 (en) Disc brake
CN105229327A (en) Comprise the friction plate being connected central layer
CN103314233B (en) Oil clutch and there is the speed change gear of oil clutch
EP3739231B1 (en) Power transmission device
CN113710913B (en) Wet friction plate and wet multi-plate clutch device
US20070295576A1 (en) Clutch Piston

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C02 Deemed withdrawal of patent application after publication (patent law 2001)
WD01 Invention patent application deemed withdrawn after publication

Open date: 20080206