CN107269743A - A kind of wet type engaging power output device and tractor - Google Patents

A kind of wet type engaging power output device and tractor Download PDF

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Publication number
CN107269743A
CN107269743A CN201710626014.8A CN201710626014A CN107269743A CN 107269743 A CN107269743 A CN 107269743A CN 201710626014 A CN201710626014 A CN 201710626014A CN 107269743 A CN107269743 A CN 107269743A
Authority
CN
China
Prior art keywords
clutch
power output
piston
wet type
friction plate
Prior art date
Application number
CN201710626014.8A
Other languages
Chinese (zh)
Inventor
冯茂林
张继伟
尹林燕
张心雨
Original Assignee
雷沃重工股份有限公司
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 雷沃重工股份有限公司 filed Critical 雷沃重工股份有限公司
Priority to CN201710626014.8A priority Critical patent/CN107269743A/en
Publication of CN107269743A publication Critical patent/CN107269743A/en

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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
    • F16D25/00Fluid-actuated clutches
    • F16D25/06Fluid-actuated clutches in which the fluid actuates a piston incorporated in, i.e. rotating with the clutch
    • F16D25/062Fluid-actuated clutches in which the fluid actuates a piston incorporated in, i.e. rotating with the clutch the clutch having friction surfaces
    • F16D25/063Fluid-actuated clutches in which the fluid actuates a piston incorporated in, i.e. rotating with the clutch the clutch having friction surfaces with clutch members exclusively moving axially
    • F16D25/0635Fluid-actuated clutches in which the fluid actuates a piston incorporated in, i.e. rotating with the clutch the clutch having friction surfaces with clutch members exclusively moving axially with flat friction surfaces, e.g. discs
    • F16D25/0638Fluid-actuated clutches in which the fluid actuates a piston incorporated in, i.e. rotating with the clutch the clutch having friction surfaces with clutch members exclusively moving axially with flat friction surfaces, e.g. discs with more than two discs, e.g. 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
    • F16D25/00Fluid-actuated clutches
    • F16D25/12Details not specific to one of the before-mentioned types
    • F16D25/123Details not specific to one of the before-mentioned types in view of cooling and 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
    • F16D25/00Fluid-actuated clutches
    • F16D25/12Details not specific to one of the before-mentioned types
    • F16D25/14Fluid pressure control
    • 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
    • F16D55/00Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes
    • F16D55/24Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with a plurality of axially-movable discs, lamellae, or pads, pressed from one side towards an axially-located member
    • F16D55/26Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with a plurality of axially-movable discs, lamellae, or pads, pressed from one side towards an axially-located member without self-tightening action
    • F16D55/28Brakes with only one rotating disc
    • F16D55/32Brakes with only one rotating disc actuated by a fluid-pressure device arranged in or on the brake
    • 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
    • F16D67/00Combinations of couplings and brakes; Combinations of clutches and brakes
    • F16D67/02Clutch-brake combinations
    • F16D67/04Clutch-brake combinations fluid actuated

Abstract

The present invention relates to technical field of agricultural machinery, and in particular to a kind of wet type engaging power output device and tractor.The wet type engaging power output device that the present invention is provided includes clutch hub, middle hub, first piston, platen, clutch component and brake assemblies, so entered in hydraulic oil by fuel feed hole in plunger shaft, first piston is promoted to extrude the clutch component, clutch is engaged, and power input shaft drives clutch hub synchronous axial system together by clutch component;When hydraulic oil draining, first piston resets, now first piston does not extrude the clutch component, clutch separation, when the clutch is disengaged, hydraulic oil promotes second piston extruding brake assemblies, and clutch hub is braked, the braking of power output system can be realized, avoid clutch separation rear power output shaft from being rotated further under effect of inertia, reduce accident risk, improve security.

Description

A kind of wet type engaging power output device and tractor
Technical field
The present invention relates to technical field of agricultural machinery, and in particular to a kind of wet type engaging power output device and tractor.
Background technology
Traditional wet engaging power output device, when clutch is engaged, is injected into highly pressurised liquid and promotes piston to move in oil pocket It is dynamic, extruding telophragma and friction plate, so as to realize the purpose of transmission moment of torsion.But there is shortcoming at two in this structure:1. clutch Oil pressure is higher in oil pocket during separation and oil extraction is difficult, separation retardance even unseparated situation easily occurs.2. clutch separation Afterwards, related components can be still rotated further under effect of inertia.
The content of the invention
(1) the technical problem to be solved in the present invention is:Oil when traditional wet engaging power output device has clutch separation Intracavitary oil pressure is higher and oil extraction is difficult, separation retardance even unseparated situation easily occurs.And after clutch separation, it is related Parts can be still rotated further under effect of inertia.
(2) technical scheme
In order to solve the above-mentioned technical problem, the invention provides a kind of wet type engaging power output device, including clutch Formed and mutually interconnected in hub, middle hub, first piston, second piston, platen, clutch component and brake assemblies, the clutch hub Logical plunger shaft and accommodating chamber, the first piston is arranged in the plunger shaft, the clutch component and the brake assemblies It is arranged in the accommodating chamber, one end of the clutch component connects with the first piston, the other end and the platen phase Connect, the brake assemblies are used to limit the clutch hub rotation, and the clutch hub is provided with what is connected with the plunger shaft Fuel feed hole.
Beneficial effects of the present invention:
The wet type engaging power output device that the present invention is provided include clutch hub, middle hub, first piston, platen, from Seaming element and brake assemblies, so when hydraulic oil is entered in plunger shaft by fuel feed hole, promote first piston extruding described from Seaming element, clutch engagement, middle hub drives clutch hub synchronous axial system together by clutch component;When hydraulic oil draining One piston reset, now first piston do not extrude the clutch component, clutch separation, when the clutch is disengaged second piston squeeze Brake assemblies are pressed, clutch hub are braked, it is possible to achieve the braking of power output system, it is to avoid power after clutch separation Output shaft is rotated further under effect of inertia, reduces accident risk, improves security.
Further, the brake assemblies include disk spring, the second friction plate and second piston, and the platen is located at institute State in accommodating chamber and be fixedly connected with the clutch hub, one end of the platen connects with described clutch component one end, another End connects with one end of second friction plate, and the other end of second friction plate connects with the second piston.
Further, the disk spring is arranged between the platen and the second friction plate, and second friction plate One end connect with the second piston.
Further, the clutch component include telophragma, the first friction plate, return spring, described telophragma one end with The first piston connects, and the other end connects with first friction plate, the first friction plate other end and the platen phase Connect, described return spring one end connects with the first piston, other end limited location.
Further, the first piston is provided with check valve, and valve is closed when clutch is engaged, valve during clutch separation Open emptying.
Further, sealing ring is provided with the plunger shaft.
Further, the inwall of the plunger shaft is provided with annular groove, and the sealing ring is arranged in the annular groove.
Further, the clutch component includes the first friction plate, telophragma, return spring;The wet type engaging power Output device also includes power output shaft, and one end of the power output shaft is connected with stating clutch hub spline, and described first rubs Pad and the middle hub are connected, and the telophragma is connected with the clutch hub, first friction plate and the telophragma It is multiple and arranged for interval.
Present invention also offers a kind of tractor, including wet type engaging power output device described in any of the above-described.
Brief description of the drawings
Above-mentioned and/or additional aspect the advantage of the present invention will be apparent from description of the accompanying drawings below to embodiment is combined Be readily appreciated that, wherein:
Fig. 1 is the cross section structure diagram of wet type engaging power output device described herein;
Fig. 2 is the structural representation of wet type engaging power output device described herein.
Corresponding relation in wherein Fig. 1 and Fig. 2 between reference and component names is:
1st, clutch hub, 11, plunger shaft, 111, first piston, 1111, connection oil duct, 1112, steel ball, 1113, draining Hole, 112, annular groove, 1121, sealing ring, 12, fuel feed hole, 13, accommodating chamber, 131, clutch component, the 1311, first friction plate, 1312nd, telophragma, 1313, return spring, 132, platen, 133, brake assemblies, 1331, disk spring, the 1332, second friction Piece, 134, second piston, 2, middle hub
Embodiment
It is below in conjunction with the accompanying drawings and specific real in order to be more clearly understood that the above objects, features and advantages of the present invention Mode is applied the present invention is further described in detail.It should be noted that in the case where not conflicting, the implementation of the application Feature in example and embodiment can be mutually combined.In the description of the invention, it is necessary to explanation, term is " " center ", " vertical To ", " transverse direction ", " on ", " under ", "front", "rear", "left", "right", " vertical ", " level ", " top ", " bottom ", " " interior ", " outer " etc. The orientation or position relationship of instruction are, based on orientation shown in the drawings or position relationship, to be for only for ease of the description present invention and letter Change description, rather than indicate or imply signified device or element must have specific orientation, with specific azimuth configuration and Operation, therefore be not considered as limiting the invention.In addition, term " first ", " second " are only used for describing purpose, and can not It is interpreted as indicating or implying relative importance.
In the description of the invention, it is necessary to illustrate, unless otherwise clearly defined and limited, term " installation ", " phase Even ", " connection " should be interpreted broadly, for example, it may be being fixedly connected or being detachably connected, or be integrally connected;Can To be mechanical connection or electrical connection;Can be joined directly together, can also be indirectly connected to by intermediary, Ke Yishi The connection of two element internals.For the ordinary skill in the art, with concrete condition above-mentioned term can be understood at this Concrete meaning in invention.In addition, in the description of the invention, unless otherwise indicated, " multiple " are meant that two or two More than.
As depicted in figs. 1 and 2, the invention provides a kind of wet type engaging power output device, including clutch hub 1, In one piston 111, clutch component 131, platen 132, brake assemblies 133, second piston 134, middle hub 2, the clutch hub 1 Interconnected plunger shaft 11 and accommodating chamber 13 is formed, the first piston 111 is arranged in the plunger shaft 11, the clutch Component 131 and the brake assemblies 132 are arranged in the accommodating chamber 13, one end and the work of the clutch component 131 Plug connects, and the other end connects with the platen 132, and the brake assemblies 133 are rotated for limiting the clutch hub 1, described Clutch hub 1 is provided with the fuel feed hole 12 connected with the plunger shaft 11.
The wet type engaging power output device that the present invention is provided includes clutch hub 1, first piston 111, clutch component 131st, platen 132, brake assemblies 133, are so entered in plunger shaft 11 in hydraulic oil by fuel feed hole 12, promote first piston The 111 extruding clutch components 131, clutch engagement, middle hub 2 drives clutch hub 1 synchronous together by clutch component 131 Rotate;When hydraulic oil draining, first piston 111 resets, and now first piston 111 does not extrude the clutch component 131, clutch Device is separated, when the clutch is disengaged, the extruding brake assemblies 133 of second piston 134, and clutch hub 1 is braked, it is possible to achieve The braking of power output system, it is to avoid clutch separation rear power output shaft is rotated further under effect of inertia, reduces accident wind Danger, improves security.
Preferably, it is described as shown in figure 1, the brake assemblies 133 include disk spring 1331, the second friction plate 1332 Platen 132 is fixedly connected in the accommodating chamber 13 and with the clutch hub 1, described one end of platen 132 and the dish One end of spring 1331 connects, and second friction plate 1332 is between the disk spring 1331 and the second piston 134. So in clutch separation, second piston 134 is moved under the driving of operating oil pressure, extrudes the second friction plate 1332, by the Two friction plates 1332, disk spring 1331, platen 132 are pressed together, by the frictional force between each part, can avoid from Clutch hub 1 drives power output shaft to continue to rotate due to rotary inertia, causes accident occur because that can not brake at once;Friction catch Structure can realize the braking of power output system, it is to avoid clutch separation rear power output shaft continues to turn under effect of inertia It is dynamic, accident risk is reduced, security is improved.
As shown in figure 1, the middle hub 2 is provided with cooling oil duct, be communicated with the first piston 111 cooling oil duct and Current limiting element, so when clutch is engaged, oil-feed are provided with the connection oil duct 1111 of plunger shaft 11, the connection oil duct 1111 The oil-feed of hole 12, into plunger shaft 11, subsequently into the connection oil duct 1111 on first piston 111, now current limiting element is cut Disconnected plunger shaft 11 is connected with cooling oil duct, due to the effect of oil pressure, promotes the extruding clutch component 131 of first piston 111, clutch Component 131 is engaged, power output system normal work;When the clutch is disengaged, current limiting element does not work, now the He of plunger shaft 11 Cooling oil duct is connected by connecting oil duct 1111, and then the hydraulic oil in plunger shaft 11 enters in cooling oil duct, can be rapid Reduce the oil pressure of plunger shaft 11, it is to avoid the unseparated phenomenon of friction plate occurs, and oil drainage structure can be in clutch separation by fluid Rapid discharge, reduction operating oil pressure and the oil pressure because of centrifugal motion generation, accelerate friction plate separation process.
Preferably, it is described as shown in figure 1, the current limiting element is the steel ball 1112 in the connection oil duct 1111 Connection oil duct 1111 is connected by oil leak hole 1113 with the cooling oil duct, and the diameter of the steel ball 1112 is more than the oil leak hole 1113 diameter.So when clutch is engaged, the oil-feed of fuel feed hole 12, into plunger shaft 11, subsequently into first piston 111 On connection oil duct 1111 in, now steel ball 1112 blocks oil leak hole 1113 in the presence of oil pressure, and the cut-out of steel ball 1112 is lived Plug chamber 11 is connected with cooling oil duct, now due to the effect of oil pressure, promotes the extruding clutch component 131 of first piston 111, clutch Component 131 is engaged, power output system normal work;When the clutch is disengaged, steel ball 1112 is not pressurized to leave in piston Wall, fluid is released from oil leak hole 1113, and plunger shaft 11 is connected with cooling oil duct by connecting oil duct 1111, then in plunger shaft 11 Hydraulic oil enter in cooling oil duct, can rapidly reduce the oil pressure of plunger shaft 11, it is to avoid friction plate unseparated phenomenon hair Raw, oil drainage structure can discharge fluid rapidly in clutch separation, reduction operating oil pressure and the oil pressure produced by centrifugal motion, Accelerate friction plate separation process.
It should be noted that the current limiting element can also be other structures in this application, current limiting element is as described Check valve, the check valve is merely able to one-way conduction, and it can equally realize the purpose of the application, and its objective is without departing from the present invention Design philosophy, protection scope of the present invention should be belonged to.
Preferably, sealing ring 1121 is provided with the plunger shaft 11, the sealing ring 1121 is able to ensure that first piston 111 It can be moved in the interior sealing of plunger shaft 11;Specifically, the inwall of the plunger shaft 11 is provided with annular groove 112, the sealing ring 1121 are arranged in the annular groove 112.
Preferably, the clutch component 131 includes the first friction plate 1311 and telophragma 1312;The wet type engaging power Output device also includes power output shaft, and the power output shaft is connected with the spline of clutch hub 1, first friction plate 1311 are connected with the middle hub 2, and the telophragma 1312 is connected with the clutch hub 1, the He of the first friction plate 1311 The telophragma 1312 is multiple and arranged for interval, so when clutch is engaged, the first friction plate 1311 and telophragma 1312 mutually extruding, impart power to clutch hub 1, and now middle hub 2 drives the synchronous axial system together of clutch hub 1;When from When clutch is separated, the first friction plate 1311 and telophragma 1312 are separated, and realize power transmission interruption.
1 illustrate the course of work of wet type engaging power output device that the present invention is provided below in conjunction with the accompanying drawings.
When clutch needs engagement, the oil-feed of fuel feed hole 12, into plunger shaft 11, subsequently on first piston 111 Connection oil duct 1111 in, now steel ball 1112 blocks oil leak hole 1113 in the presence of oil pressure, the cut-out piston of steel ball 1112 Chamber 11 is connected with cooling oil duct, now due to the effect of oil pressure, promotes the extruding clutch component 131 of first piston 111, clutch group Part 131 is engaged, power output system normal work;When the clutch is disengaged, steel ball 1112 not by oil pressure so as to departing from first The inwall of piston 111, fluid is released from oil leak hole 1113, and plunger shaft 11 is connected with cooling oil duct by connecting oil duct 1111, then Hydraulic oil in plunger shaft 11 enters in cooling oil duct, can rapidly reduce the oil pressure of plunger shaft 11, it is to avoid the first friction plate 1311 and the unseparated phenomenon of telophragma 1312 occur, while in clutch separation, drive of the second piston 134 in operating oil pressure Dynamic lower motion, extrudes the second friction plate 1332, the second friction plate 1332, disk spring 1331, platen 132 is pressed together, Platen 132 is integrally fixed on clutch hub 1 simultaneously, so after clutch separation, passes through the friction plate of platen 132 and second Frictional force between 1332, can avoid clutch hub 1 from continuing to rotate because of rotary inertia, cause to brake at once and thing occur Therefore;Friction catch structure can realize the braking of power output system, it is to avoid clutch separation rear power output shaft is made in inertia It is rotated further under, reduces accident risk, improves security.
Present invention also offers a kind of tractor, including wet type engaging power output device described in any of the above-described.Due to The wet type engaging power output device that the present invention is provided is provided with draining mechanism and arrestment mechanism, and oil drainage structure can be in clutch point From when fluid is discharged rapidly, reduce oil pressure, accelerate friction plate separation process;Friction catch structure can realize power take-off system The braking of system, it is to avoid clutch separation rear power output shaft is rotated further under effect of inertia, reduces accident risk, improves safety Property.
In summary, the wet type engaging power output device that the present invention is provided includes clutch hub, first piston, the second work Plug, platen, clutch component and brake assemblies, are so entered in plunger shaft in hydraulic oil by fuel feed hole, promote first piston to squeeze The clutch component is pressed, clutch engagement, middle hub drives clutch hub synchronous axial system together by clutch component;Work as hydraulic oil First piston resets during draining, and now first piston does not extrude the clutch component, clutch separation, when the clutch is disengaged, Second piston extrudes brake assemblies, clutch hub is braked, it is possible to achieve the braking of power output system, it is to avoid clutch Separation rear power output shaft is rotated further under effect of inertia, reduces accident risk, improves security.
The foregoing is only presently preferred embodiments of the present invention, be not intended to limit the invention, it is all the present invention spirit and Within principle, any modification, equivalent substitution and improvements made etc. should be included in the scope of the protection.

Claims (9)

1. a kind of wet type engaging power output device, it is characterised in that:Including clutch hub, middle hub first piston, platen, from Interconnected plunger shaft and accommodating chamber is formed in seaming element and brake assemblies, the clutch hub, the first piston is set In the plunger shaft, the clutch component and the brake assemblies are arranged in the accommodating chamber;The clutch component One end connects with the first piston, and the other end connects with the platen, and the brake assemblies are used to limit the clutch hub Rotate, the clutch hub is provided with the fuel feed hole connected with the plunger shaft.
2. wet type engaging power output device according to claim 1, it is characterised in that:The brake assemblies include dish Spring, the second friction plate and second piston, the platen is in the accommodating chamber and is fixedly connected with the clutch hub, institute The one end for stating platen connects with described clutch component one end, and the other end connects with one end of second friction plate, and described second The other end of friction plate connects with the second piston.
3. wet type engaging power output device according to claim 2, it is characterised in that:The disk spring is arranged in institute State between platen and the second friction plate, and one end of second friction plate connects with the second piston.
4. wet type engaging power output device according to claim 1, it is characterised in that:The clutch component includes centre Disk, the first friction plate, return spring, described telophragma one end connect with the first piston, the other end and the described first friction Piece connects, and the first friction plate other end connects with the platen, and described return spring one end connects with the first piston, Other end limited location.
5. wet type engaging power output device according to claim 4, it is characterised in that:The first piston is provided with unidirectional Valve, valve is closed when clutch is engaged, valve opening emptying during clutch separation.
6. wet type engaging power output device according to claim 1, it is characterised in that:Provided with sealing in the plunger shaft Ring.
7. wet type engaging power output device according to claim 6, it is characterised in that:Set on the inwall of the plunger shaft There is annular groove, the sealing ring is arranged in the annular groove.
8. the wet type engaging power output device according to any one of claim 1 to 7, it is characterised in that:The clutch group Part includes the first friction plate, telophragma, return spring;The wet type engaging power output device also includes power output shaft, institute State one end of power output shaft and be connected with stating clutch hub spline, first friction plate and the middle hub be connected, it is described in Disk is connected with the clutch hub, and first friction plate and the telophragma are multiple and arranged for interval.
9. a kind of tractor, it is characterised in that:Including the wet type engaging power output device as described in any one of right 1 to 8.
CN201710626014.8A 2017-07-27 2017-07-27 A kind of wet type engaging power output device and tractor CN107269743A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201710626014.8A CN107269743A (en) 2017-07-27 2017-07-27 A kind of wet type engaging power output device and tractor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201710626014.8A CN107269743A (en) 2017-07-27 2017-07-27 A kind of wet type engaging power output device and tractor

Publications (1)

Publication Number Publication Date
CN107269743A true CN107269743A (en) 2017-10-20

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CN201710626014.8A CN107269743A (en) 2017-07-27 2017-07-27 A kind of wet type engaging power output device and tractor

Country Status (1)

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CN (1) CN107269743A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108266468A (en) * 2018-01-15 2018-07-10 北京理工大学 A kind of bearing mechanism of multidisc clutch and pressure-bearing method
CN108591300A (en) * 2018-07-24 2018-09-28 湖北职业技术学院 Clutch apparatus
CN111051722A (en) * 2018-03-28 2020-04-21 株式会社小松制作所 Friction engagement device for working vehicle and working vehicle
EP3726086A1 (en) * 2019-04-18 2020-10-21 Hamilton Sundstrand Corporation Hydraulic clutch assemblies

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108266468A (en) * 2018-01-15 2018-07-10 北京理工大学 A kind of bearing mechanism of multidisc clutch and pressure-bearing method
CN111051722A (en) * 2018-03-28 2020-04-21 株式会社小松制作所 Friction engagement device for working vehicle and working vehicle
CN108591300A (en) * 2018-07-24 2018-09-28 湖北职业技术学院 Clutch apparatus
EP3726086A1 (en) * 2019-04-18 2020-10-21 Hamilton Sundstrand Corporation Hydraulic clutch assemblies

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