CN204828361U

CN204828361U - Piston cylinder fixed atmospheric pressure multi -disc friction clutch

Info

Publication number: CN204828361U
Application number: CN201520504140.2U
Authority: CN
Inventors: 柯晓贤
Original assignee: Hubei Aode Transmission Technology Co Ltd
Current assignee: Hubei Aode Transmission Technology Co Ltd
Priority date: 2015-07-13
Filing date: 2015-07-13
Publication date: 2015-12-02
Anticipated expiration: 2025-07-13

Abstract

The utility model discloses a piston cylinder fixed atmospheric pressure multi -disc friction clutch connects between a transmission and the 2nd transmission, and atmospheric pressure multi -disc friction clutch includes preceding segment structure, back segment structure and connecting axle, segment structure and back segment structure before the connecting axle runs through, and preceding segment structure includes piston cylinder, piston, pressure disk and reset spring, back segment structure includes inner friction bar, a plurality of inner friction piece, a plurality of external friction plate and external friction plate adapter sleeve, the piston cylinder is installed on a transmission, and piston cylinder, piston, pressure disk, reset spring, inner friction bar, external friction plate adapter sleeve coordinate the connection in proper order, and a plurality of inner friction pieces and a plurality of external friction plate are the interval arrangement one by one, and the 2nd transmission fixed connection is on the external friction plate adapter sleeve. The utility model provides an atmospheric pressure multi -disc friction clutch compact structure, protection and heat dispersion better, be convenient for maintenance and maintenance.

Description

The fixed air pressure multi-disc friction clutch of a kind of piston cylinder

Technical field

The utility model relates to air pressure friction clutch, particularly relates to the fixed air pressure multi-disc friction clutch of a kind of piston cylinder.

Background technique

Pneumatically controlled clutch has combination steadily, transmitting torque is large, can high frequency from, close and be swift in motion, do not need adjusting play, can adapt to Automated condtrol, particularly the fixed air pressure multi-disc friction clutch of piston cylinder also has piston cylinder and does not turn round, and rotary inertia is little, air intake structure is simple and reliable, and some universal machines and automation equipment widely use.

But the fixed air pressure multiplate clutch of existing piston cylinder is for ensureing generalization, seriation, have employed integral shaft nested structure to be convenient to load and unload from power connection shaft, friction plate open type radiating structure causes dust and rainwater more easily to invade, piston cylinder bearing independent support also uses rotation preventive mechanism and casing spline on axle sleeve, cause the effective active area of piston less and whole clutch external diameter and length dimension are strengthened, bearing between platen and piston and piston cylinder spring bearing clutch in conjunction with time should rotate and also will bear larger axial force, a part of lubricating grease filling when the lubrication of this two places bearing is only dispatched from the factory by manufacturer lubricates, finite capacity and at ordinary times inconvenience supplement install additional, so two bearings easily generate heat and wear and tear and cause earlier period damage, outside friction disc connecting sleeve generally uses 1-2 bearings on axle sleeve, bearing and outside friction disc connecting sleeve special tool need be unloaded when exchange and more renewal of facing renewal and just can carry out, time-consuming and easily the bearing position on axle sleeve is damaged, affect positioning precision and care and maintenance cost is higher.

Because above many factors causes that existing clutch is purchased, M R cost is high, also cannot in the occasion of rain, dust and narrow space and improper ventilation as the actuating unit of some special-purpose vehicles uses, have impact on the automaticity of some mechanized equipments such as special-purpose vehicle, become those skilled in the art's problem demanding prompt solution.

Model utility content

For solving the problems of the technologies described above, the utility model provides a kind of compact structure, protection and good heat dispersion performance, is convenient to the fixed air pressure multi-disc friction clutch of piston cylinder that maintains and safeguard.

For achieving the above object, the utility model by the following technical solutions:

The fixed air pressure multi-disc friction clutch of a kind of piston cylinder, be connected between the first transmission device and the second transmission device, described air pressure multi-disc friction clutch comprises front segment structure, rear section structure and coupling shaft, wherein said first transmission device is connected to the first end of described coupling shaft by the first back shaft bearing member, described second transmission device is arranged on the second end of described coupling shaft, described coupling shaft runs through described front segment structure and described rear section structure, and described front segment structure comprises piston cylinder, piston, platen and Returnning spring; Described rear section structure comprises inner attrition piece seat, multiple inner attrition piece, multiple outside friction disc and outside friction disc connecting sleeve;

Described piston cylinder is arranged on described first transmission device, gap is provided with between described piston cylinder and described coupling shaft, described piston and described piston jar axis for mist are to slidably and be tightly connected, described platen is connected with described piston by the second back shaft bearing member, described Returnning spring is arranged on described platen with in the hole be communicated with of described inner attrition piece seat, on described piston cylinder, be wherein provided with one control air pressure interface, described control air pressure orifice is to the cavity between described piston cylinder and described piston;

Described inner attrition piece seat and described coupling shaft are connected, described outside friction disc connecting sleeve is connected with described inner attrition piece seat by the 3rd back shaft bearing member, described multiple inner attrition piece and described inner attrition piece seat are connected, described multiple outside friction disc and described outside friction disc connecting sleeve are connected, described multiple inner attrition piece and described multiple outside friction disc are spaced one by one, second end of described coupling shaft is provided with fixing device by the axial restraint of described rear section structure, described second transmission device is fixedly connected on described outside friction disc connecting sleeve.

In further embodiment, described 3rd back shaft bearing member comprises clutch shaft bearing and the second bearing, the first spacer is provided with between the inner ring of described clutch shaft bearing and described second bearing, described clutch shaft bearing and described second axle sleeve are single facer radial ball bearing or single facer angular contact ball bearing, described outside friction disc connecting sleeve is provided with the first annular boss, described first annular boss to be arranged between described clutch shaft bearing and described second bearing to locate described clutch shaft bearing and described second bearing, and described first annular boss is provided with the first arc groove; Further, described outside friction disc connecting sleeve is provided with grease nipple, the installation thread Pilot hole of described grease nipple is communicated with described first arc groove.Seal gease more more than hermetic two bearings can be added when assembling in clutch shaft bearing and the second bearing, improve lubrication heat dissipation potential and the bearing capacity of bearing, and extend its maintenance period; And add lubricating grease more easily to two bearings by grease nipple, make care and maintenance convenient and significant prolongation its working life.

In further embodiment, the surface of contact of described inner attrition piece seat and described 3rd back shaft bearing member is relative to the surface of contact indent of described outside friction disc connecting sleeve and described second transmission device, wherein the size of indent is more than or equal to the thickness size of described 3rd back shaft bearing member, and the axial dimension of clutch is reduced further.

In further embodiment, the internal diameter of the inner ring of described piston cylinder is than 0.1 ~ 0.25mm large with the external splines external diameter of described piston cylinder corresponding part on described coupling shaft, ensure the internal diameter fixed basis of piston cylinder reducing to greatest extent piston, thus increase the effective active area of piston to greatest extent.

In further embodiment, the left side of described platen directly contacts the outside friction disc of the rightmost side in described multiple outside friction disc; The right side of described inner attrition piece seat or described outside friction disc connecting sleeve directly contacts the outside friction disc of the leftmost side in described multiple outside friction disc.Make, when same rubbing surface, to shorten the axial dimension of clutch further.

In further embodiment, the cavity place between described platen and described piston is provided with the second oil sealing, and described second back shaft bearing member is the single-row angular contact ball bearing of single facer or the single-row radial ball bearing of single facer.Can disposable interpolation lubrication and seal fat more more than hermetic spring bearing of the prior art, improve lubrication heat dissipation potential and the bearing capacity of the second back shaft bearing member, and extend its maintenance period and working life.

In further embodiment, between described piston and described inner attrition piece seat, be provided with rotation preventive mechanism, described rotation preventive mechanism is included in multiple spring guides that described platen is fixedly connected with, and described spring guide can slide in the respective aperture of described inner attrition piece seat; Described Returnning spring relative set is multiple, and Returnning spring described in each is arranged in corresponding spring guide.The spline setting that spring guide can omit platen end face and inner attrition piece seat corresponding end-faces is set, thus shortens the axial dimension of clutch further.

In further embodiment, the radial circumference direction of described platen arranges multiple pod apertures, second vent hole of multiple radial direction is set at the external splines groove bottom of described inner attrition piece seat, the web of the internal spline near described inner attrition piece seat arranges multiple the 3rd axial vent hole, the cylindrical of the spline tooth of described outside friction disc connecting sleeve arranges multiple first guide rib, and the space between multiple described first guide rib, multiple described pod apertures, multiple described second vent hole and multiple described 3rd vent hole are mutually through; By arranging the vent hole be connected in the inner each structure of clutch, improving the heat dissipation potential of clutch and extending its working life.Further, at each external splines slot tail of described inner attrition piece seat, axially the first vent hole is set, described first vent hole and multiple described second vent hole mutually through; Further, the outer large end face of inner attrition piece seat is provided with several the radially lineal shape/of circle distribution or spiral guiding gutters, described guiding gutter and described first vent hole mutually through.The heat dissipation potential that first vent hole and guiding gutter further strengthen clutch is set.

In further embodiment, between described piston cylinder and the cylindrical of described outside friction disc connecting sleeve, the first air guide sleeve is set, described first air guide sleeve is fixedly connected with described piston cylinder, and the left end of described first air guide sleeve and described outside friction disc connecting sleeve form the protection interface of L shape.First air guide sleeve is set and makes clutch have good waterproof and dustproof and degassing function with the protection interface that outside friction disc connecting sleeve forms L shape.

In further embodiment, have multiple first new ventilation slot in the junction of described first air guide sleeve and described piston cylinder, described multiple first new ventilation slot is provided with the first filter screen.The heat dissipation potential that first new ventilation slot improves clutch is further set, arrange the first filter screen ensure that clutch in conjunction with time suck effective combination that new wind affects friction plate for lowering the temperature and accelerate to prevent the suction of dust and foreign matter while the inner hot gas convection current of clutch is discharged.

The utility model beneficial effect is compared with prior art:

Air pressure multi-disc friction clutch of the present utility model by direct for piston cylinder location and installation on the bearing hole end face of the first transmission device, eliminate original piston cylinder spring bearing and piston cylinder rotation preventive mechanism, avoid former piston cylinder spring bearing and while rotating, also will will bear the reaction force of air pressure and possible when mounted crooked the produced additional moment of former piston cylinder rotation preventive mechanism and the bearing heating that causes and wearing and tearing; Piston cylinder inner ring outside diameter without spring bearing can reduce greatly, thus the effective active area of piston is increased greatly, friction clutch with existing same specification is compared, then external diameter is less, length is shorter, make structure not only simple but also compact, and the simple and firm position of the installation of piston cylinder, again reduces cost of production simultaneously.Air pressure multi-disc friction clutch of the present utility model have employed forward and backward two-part and arranges, is convenient to install, maintain and safeguard, reduces manufacturing cost and use cost.

In further scheme, the cylindrical of piston cylinder and outside friction disc connecting sleeve is provided with the first air guide sleeve, with protective action, air pressure multi-disc friction clutch of the present utility model can be made to use under the environment of rainwater and dust, coordinate the first guide rib on outside friction disc connecting sleeve and have water conservancy diversion effect again in conjunction with the ventilation water conservancy diversion effect of the pod apertures on the guiding gutter on inner attrition piece seat and the first vent hole, the second vent hole, the 3rd vent hole and platen with the hot gas of sucking-off air pressure multi-disc friction clutch inside, improve heat dissipation potential; And first protective housing can lay down easily when not removing other component, to observe the abrasion condition of inner attrition piece and outside friction disc, and with pressurized air cleaning air pressure multi-disc friction clutch inside impurity.

In sum, the utility model solves heat radiation and the protection question of the fixed air pressure multi-disc friction clutch of existing piston cylinder, and boundary dimension is excessive and the problem of inconvenient maintenance and maintenance, purchase to reduce, maintain, maintenance cost, expand its application and Applicable scope, promote some universal machines better with some special-purpose machineries as the intelligent level of special purpose vehicle etc.

Accompanying drawing explanation

Fig. 1 is the sectional drawing of the fixed air pressure multi-disc friction clutch of piston cylinder of the utility model embodiment one;

Fig. 2 is the sectional drawing of the fixed air pressure multi-disc friction clutch of piston cylinder of the utility model embodiment two.

Embodiment

Below contrast accompanying drawing and combine preferred embodiment the utility model is described in further detail.

The utility model discloses the fixed air pressure multi-disc friction clutch of a kind of piston cylinder, be connected between the first transmission device and the second transmission device, air pressure multi-disc friction clutch comprises front segment structure, rear section structure and coupling shaft, wherein said first transmission device is connected to the first end of described coupling shaft by the first back shaft bearing member, described second transmission device is arranged on the second end of described coupling shaft, described coupling shaft runs through described front segment structure and described rear section structure, and described front segment structure comprises piston cylinder, piston, platen and Returnning spring; Described rear section structure comprises inner attrition piece seat, multiple inner attrition piece, multiple outside friction disc and outside friction disc connecting sleeve; Described piston cylinder is arranged on described first transmission device, gap is provided with between described piston cylinder and described coupling shaft, described piston and described piston jar axis for mist are to slidably and be tightly connected, described platen is connected with described piston by the second back shaft bearing member, described Returnning spring is arranged on described platen with in the hole be communicated with of described inner attrition piece seat, on described piston cylinder, be wherein provided with one control air pressure interface, described control air pressure orifice is to the cavity between described piston cylinder and described piston; Described inner attrition piece seat and described coupling shaft are connected, described outside friction disc connecting sleeve is connected with described inner attrition piece seat by the 3rd back shaft bearing member, described multiple inner attrition piece and described inner attrition piece seat are connected, described multiple outside friction disc and described outside friction disc connecting sleeve are connected, described multiple inner attrition piece and described multiple outside friction disc are spaced one by one, second end of described coupling shaft is provided with fixing device by the axial restraint of described rear section structure, described second transmission device is fixedly connected on described outside friction disc connecting sleeve.

As shown in Figure 1, it is the sectional drawing of the fixed air pressure multi-disc friction clutch of piston cylinder of the utility model embodiment one, air pressure multi-disc friction clutch adopts forward and backward two-part structure, comprise front segment structure, rear section structure and coupling shaft 3, wherein front segment structure comprises piston cylinder 11, piston 12, platen 13, Returnning spring 14, first air guide sleeve 15, and rear section structure comprises inner attrition piece seat 21, multiple inner attrition piece 22, multiple outside friction disc 23, outside friction disc connecting sleeve 24; Coupling shaft 3 is supported on the corresponding bearing hole of housing 41 of the first transmission device (the 3rd bearing 42 is the first back shaft bearing member) by the 3rd bearing 42 of the first transmission device, first transmission device can be the distributing means for power supply of special purpose vehicle, coupling shaft 3 can be the input shaft of the first transmission device, also can be output shaft.

The annexation of the housing 41 of piston cylinder 11 and the first transmission device comprises: piston cylinder 11 locates end face 111 by second, on the housing 41 that second annular boss 112 is arranged on the first transmission device on corresponding bearing hole and end face, the exterior edge face of the 3rd bearing 42 outer ring of the first transmission device is close in the right side of the second annular boss 112, piston cylinder 11 is also provided with the bolt 113 having installed bonded washer 1131 additional, piston cylinder 11 is fixedly connected on housing 41 by the bolt 113 having installed bonded washer 1131 additional, piston cylinder 11 is also supported by the first oil sealing 43 and is sealedly connected on coupling shaft 3, to ensure that the connection of piston cylinder 11 is reliable and air tight, simplify the structure and decrease radial direction and axial dimension, decrease material cost, processing charges, part cost and assembly fee are used, reduce cost and improve operational safety.Piston cylinder 11 is directly installed on the housing 41 of the first transmission device, and eliminate original piston cylinder spring bearing and piston cylinder rotation preventive mechanism, avoid former piston cylinder spring bearing and while rotating, also will will bear the reaction force of air pressure and possible when mounted crooked the produced additional moment of former piston cylinder rotation preventive mechanism and the bearing heating that causes and wearing and tearing; The cross section of piston cylinder 11 is U-shaped simultaneously, cancelling after spring bearing can by the external splines external diameter only large 0.1 ~ 0.25mm of the inner ring internal diameter of piston cylinder 11 and coupling shaft 3, to make the effective active area of piston 12 greatly increase, piston cylinder 11 also has the function of the oil sealing base of former transmission device simultaneously.

The inclined-plane of the cylindrical right-hand member of piston cylinder 11 is provided with one and controls air pressure interface 115, be both convenient to connect gas-tpe fitting and additionally reduced axial dimension.

Piston 12 comprises with the annexation of piston cylinder 11: piston 12 is provided with the first seal ring 121 and the second seal ring 122, the inner ring of piston 12 and outer ring are respectively by the first seal ring 121 and the second seal ring 122 and piston cylinder 11 axially slidably and be tightly connected, first seal ring 121 and the second seal ring 122 can select star seal ring, the inside and outside circle groove of star seal ring is convenient to store grease, has good seal performance, frictional force little and not easily distortion and the advantages such as long service life.2 ~ 3 the first straight pins 114 (the first straight pin 114 is the first rotation preventive mechanism) be fixedly connected with are provided with at the interior edge face of piston cylinder 11, first straight pin 114 slides in the corresponding hole of the end face of piston 12, for the spline of piston 12, rotate with platen 13 when bearing air pressure and moving to prevent piston 12 and damage the inner side surface in the first seal ring 121 and the second seal ring 122 and the corresponding U-shaped cross section of piston cylinder 11.

Platen 13 comprises with the annexation of piston 12: platen 13 is connected with piston 12 (the 4th bearing 131 is the second back shaft bearing member) by the 4th bearing 131, and the inside and outside circle of the 4th bearing 131 is located by connecting to the corresponding cylindrical of platen 13 and the respective interior bores transition fit of piston 12 respectively.The second oil sealing 132 is also provided with in cavity between platen 13 and piston 12, second oil sealing 132 is by the cavities seals between platen 13 and piston 12 to set up an independently grease storage groove, and the 4th bearing 131 can be the single-row angular contact ball bearing of single facer or the single-row radial ball bearing of single facer.Adopt the 4th bearing 131 of the second oil sealing 132 and single facer can disposable interpolation lubrication and seal fat more more than hermetic spring bearing of the prior art, and plug screw 134 can be backed out as required at any time in maintenance process afterwards and supplement, improve lubrication heat dissipation potential and the bearing capacity of the 4th bearing 131, and extend its maintenance period and working life.

The radial circumference direction of platen 13 is provided with multiple pod apertures 133, these pod apertures 133 can be the straight line shape vertical with coupling shaft 3 or helical, to form the function of similar fan to improve flow-guiding radiation ability, platen 13 left side can also be heat-treated and directly be contacted with the friction facings of the outside friction disc 23 of the rightmost side, the not only cost-saving axial dimension also shortening air pressure multi-disc friction clutch to replace inner attrition piece 22 with fine finishing process.

Axially the first vent hole 211 is provided with at each external splines slot tail of inner attrition piece seat 21, the second vent hole 212 of multiple radial direction is provided with at each external splines groove bottom, web near the internal spline of inner attrition piece seat 21 is provided with multiple the 3rd axial vent hole 213 and through with the second vent hole 212, on the outer large end face of inner attrition piece seat 21, be also provided with several the radially lineal shape/of circle distribution or spiral guiding gutters 214, the external splines of inner attrition piece seat 21 and the internal spline of inner attrition piece 22 are slidably connected, the external splines keyway of inner attrition piece seat 21 is that circular arc is convenient to affect using effect with helical bevel cutter to avoid the spline of other type to need easily to make the internal spline of inner attrition piece 22 fall in tool withdrawal groove at spline afterbody additional processing tool withdrawal groove, the large interior edge face of inner attrition piece seat 21 directly contacts with the friction facings of a slice outside friction disc 23 of the leftmost side owing to can replace a slice inner attrition piece 22 through Overheating Treatment with fine finishing, correspondingly again save the axial dimension that cost also shortens clutch.

Inner attrition piece seat 21 comprises with the annexation of coupling shaft 3: first of inner attrition piece seat 21 locates end face 215 and bearing position makes whole part axial size shorten relative to large end face 217 indent, the axle head external splines static connection that its internal spline is corresponding to coupling shaft 3, the right side of internal spline and the left side of the second spacer 216 are adjacent to, the right side of the second spacer 216 is adjacent to the left side of the circlip for shaft 31 arranged at coupling shaft 3 external splines ending place, by the cumulative error using the second spacer 216 of different-thickness size to carry out free size chain, for ensureing the relative position size of clutch front section and hindfoot portion, avoid the stroke of piston 12 excessive or too small and the normal combination affecting friction pair be separated.

Inner attrition piece 21 comprises with the annexation of platen 13: in the middle part of the end face that the right side of platen 13 is adjacent with inner attrition piece, be also fixedly connected with 3-6 spring guide 135 (spring guide 135 is the second rotation preventive mechanism), can slide in the corresponding hole of inner attrition piece seat 21, double as the spline cover of platen 13 relative to inner attrition piece seat 21 simultaneously, the wearing and tearing caused to prevent platen 13 from producing unnecessary trackslipping in friction pair cohesive process and heating also can accelerate the cohesive process of friction pair, Returnning spring 14 is contained in corresponding spring guide 135, automatically reseting in impact and separation process is slowed down in the process combined at friction pair for platen 13.

Outside friction disc 23 comprises with the annexation of outside friction disc connecting sleeve 24: the external splines that outside friction disc 23 and outside friction disc connecting sleeve 24 are slidably connected adopts wide tooth narrow groove type rectangle keyway, also have several lineal shapes/or spiral groove in its both sides friction facings radial direction, similar fan functionality is carried out water conservancy diversion and doubles as to hold dirty groove, improves the friction, capability of heat dissipation potential and guarantee friction plate, the narrow flute profile rectangular spline of sipes that the spline that outside friction disc connecting sleeve 24 and outside friction disc 23 are slidably connected adopts and cylindrical is through is conducive to friction plate to make the spline tooth of outside friction disc 23 be exposed to as much as possible outward and dispels the heat, the spline tooth cylindrical axial direction of outside friction disc connecting sleeve 24 be provided with double as fan blade parallel/or spiral helicine first guide rib 241 that adapts with clutch rotation direction, both the intensity of spline tooth had been strengthened, coordinate with the first air guide sleeve 15 and there is better pumping function again in conjunction with the first vent hole 211 on inner attrition piece seat 21, second vent hole 212, guiding gutter 214 on 3rd vent hole 213 and right large end face and the pod apertures 133 on platen 13 are to extract the inner hot gas 70 of clutch out and to suck outside new wind 60, the heat exchanging function of friction pair part and convection current ability are strengthened greatly, thus improve the heat dissipation potential of clutch further.

Outside friction disc connecting sleeve 24 comprises with the annexation of inner attrition piece seat 21: the spring bearing bore portion on outside friction disc connecting sleeve 24 is to projecting inward, shorten the axial dimension of this part entirety, first annular boss 242 is provided with in the middle of bearing hole, the first annular boss 242 two ends (clutch shaft bearing 243 and the second bearing 244 are the 3rd back shaft bearing member) are close in the outer ring of clutch shaft bearing 243 and the second bearing 244, the inner ring of two bearings separates with the first spacer 245 and transition fit is arranged on the corresponding bearing position of inner attrition piece seat 21 and the first location end face 215, increase the depot fat space of clutch shaft bearing 243 and the second bearing 244, clutch shaft bearing 243 and the second bearing 244 can adopt sealing radial ball bearing or the single facer angular contact ball bearing of single facer, seal gease more more than hermetic two bearings can be added when assembling, improve lubrication heat dissipation potential and the bearing capacity of bearing, and extend its maintenance period, in practical application, the thickness of the first spacer 245 can be changed to adjust the axial pretightening degree of two bearings according to the size of load, make this duplex bearing supporting structure comparatively large at the shortest and support stiffness of axial dimension, do not need to bear the end thrust of piston 12 to bear from the axis of the second transmission device 5 and radial impact, first annular boss 242 there is an arc groove 2421 communicate with the installation thread Pilot hole of grease nipple 246, add lubricating grease more easily to two bearings by grease nipple 246, make care and maintenance convenient and significant prolongation its working life.

Outside friction disc connecting sleeve 24 comprises with the annexation of the second transmission device 5: the outer connecting end surface 247 of outside friction disc connecting sleeve 24 is provided with adapt with the connection interface of the second transmission device 5 outer and is connected seam 2471 (/ or boss) and tapped hole, be convenient to directly connect various outer connecting device, the second transmission device 5 can be transmission shaft/or coupling.

Wherein: the outer connecting end surface 247 of the contact of outside friction disc connecting sleeve 24 and the second transmission device 5 is 11 ~ 19mm to the distance of the large end face 217 of inner attrition piece seat 21, the degree of depth being the screw thread that the second transmission device 5 is connected with outside friction disc connecting sleeve 24 adds outside friction disc connecting sleeve 24 and the clearance distance (0.5mm-1mm) of the large end face 217 of inner attrition piece seat 21, saves the axial dimension of clutch to greatest extent; In addition, large end face 217 indent of distance relative to inner attrition piece seat 21 of end face 215 is located in first of the contact of inner attrition piece seat 21 and clutch shaft bearing 243, indent is of a size of the thickness of clutch shaft bearing 243 more than, the corresponding bearing hole the inner of outside friction disc connecting sleeve 24 that makes also concaves corresponding distance, makes and reduce further the axial dimension of clutch.To sum up, also be outer connecting end surface 247 indent of the relative outside friction disc connecting sleeve 24 of the first location end face 215 of inner attrition piece seat, the size of indent is more than or equal to the thickness size of the 3rd spring bearing, namely the thickness sum of clutch shaft bearing 243, first spacer 245 and the second bearing 244 is more than or equal to, within making clutch shaft bearing 243 and the second bearing 244 be arranged on the outer connecting end surface 247 of outside friction disc connecting sleeve 24, thus the axial dimension of further less clutch.

Coupling shaft 3 comprises with the annexation of rear section structure: locking at the external thread of shaft end place of coupling shaft 3 has locking nut 32, the right large end face of locking nut 32 is close to the inner ring exterior edge face of clutch shaft bearing 243, make the good rigidly of the axial restraint of the inner ring of clutch shaft bearing 243 and the second bearing 244 on inner attrition piece seat 21 and the axial restraint of inner attrition piece seat 21 on coupling shaft 3 reliable again, ensure that the stability that inside and outside friction plate combines in order to avoid produce unnecessary wearing and tearing and heating, improve working life and the reliability of friction plate; Also reduce part, processing and assembly cost simultaneously, shorten axial dimension, and avoid interfering with the inner concave of the second transmission device 5.

Install at piston cylinder 11 cylindrical left end the first air guide sleeve 15 that seizing type mode connects additional and doubled as protective housing, avoid and connect because of the dismounting difficulty that screw thread rust is dead or the reason such as screw head damage causes with miniature screw, the cylindric left part of the first air guide sleeve 15 and the appropriate section of outside friction disc connecting sleeve 24 cylindrical are the protection interface 151 of outer oblique L shape, made it possess good waterproof and dustproof and degassing function.Opened several first new ventilation slots 116 relative set the first filter screen 152 at the first air guide sleeve 15 and piston cylinder 11 junction, ensure clutch in conjunction with time suck new wind 60 to affect friction plate effective combination for lowering the temperature and prevent the suction of dust and foreign matter while accelerating the inner hot gas 70 convection current discharge of clutch.

First air guide sleeve 15 also can be laid down when not removing second transmission device 5 easily, to observe friction disc wear situation and to clear up the impurity on clutch inside and the first filter screen 152 with pressurized air, find that friction plate has certain wearing and tearing if observe, then first can lay down the second transmission device 5, unload the locking nut 32 of clutch again, then from coupling shaft 3 external splines, inner attrition piece seat 21 is unloaded gently, now clutch hindfoot portion is separated with front section, inner attrition piece 22 and outside friction disc 23 can thoroughly be cleared up in time on request and exchange, extend the working life of friction plate like this, also the working service cost of clutch is greatly reduced, if now discovery friction plate has serious wear, can change in time, avoid the impact on using function, also can check clutch front section further simultaneously, cleaning, in time the lubricating grease in the lubricating grease of cavity between platen 13 and piston 12 and the first seal ring 121 and the second seal ring 122 groove is supplemented, can significant prolongation the 4th bearing 131, the working life of the first seal ring 121 and the second seal ring 122, if find the 4th bearing 131, second oil sealing 132, first seal ring 121 or the second seal ring 122 serious wear, then can change in time, the beneficial effect that the judicial convenience of M R brings thus is the whole service life and the reliability that improve clutch, reduce user cost simultaneously.

The clutch of the utility model embodiment one in conjunction with time working procedure be: the axial force that the pressurized air connected by Clutch Control air valve produces after controlling the cavity that air pressure interface 115 enters into piston cylinder 11 in and piston 12 is airtight promotes piston 12 and is moved to the left, piston 12 overcomes the first seal ring 121 and the second seal ring 122 and cylindrical and endoporus and piston cylinder 11 respective interior bores on it, frictional force between cylindrical passes through the 4th bearing 131 by axial force transmission again on platen 13, while platen 13 compression reseting spring 14 and successively first outside friction disc → second, outside friction disc → the right, second, the right first inner attrition piece → the right inner attrition piece on the right of axial compression ... until be pressed to Far Left a slice outside friction disc on the large interior edge face of inner attrition piece seat 21, straight this n inner attrition piece and n-1 outside friction disc all compress, make to be fixedly connected with coupling shaft 3 and the inner attrition piece seat 21 be slidably connected with the internal spline of inner attrition piece 22 and the outside friction disc connecting sleeve 24 that is connected with outside friction disc 23 spline slide combine, thus make the transmission of power on coupling shaft 3 to the second transmission device 5 be connected with outside friction disc connecting sleeve 24, to drive other equipment or transmission device.

Just start at friction pair to produce more heat due to the existence of unit friction work in the process combined, a part is by the first vent hole 211 on inner attrition piece seat 21, the passages such as the second vent hole 212 and the 3rd vent hole 213 are by the cavity pod apertures 133 water conservancy diversion on the guiding gutter 214 had on the right large end face 217 of fanning effect and platen 13 to first guide rib 241 and the first air guide sleeve 15 of outside friction disc connecting sleeve 24, another part then by the friction facings radial direction on outside friction disc 23 both sides arrange multiple there is fan functionality lineal shape/or spiral groove water conservancy diversion drain into this place by the keyway on outside friction disc connecting sleeve 24 cylindrical, then to combine at the first guide rib 241 while sucking outside new wind 60 from the first new ventilation slot 116 under the effect of the first air guide sleeve 15 and the hot gas of above-mentioned two and friction plate group be guided to protection interface 151 place in the lump at the hot gas at outside friction disc connecting sleeve 24 outer ring place and discharge, the new wind 60 in outside sucked can carry out lowering the temperature to friction pair part rapidly and can strengthen the convection current ability of the first guide rib 241, so far the inner hot gas 70 of clutch major part discharge, remaining partial heat then outer friction plate connecting sleeve 24, friction plate combines, part such as inner attrition piece seat 21 grade is stored and is progressively distributed by surrounding atmosphere.After adopting above technology, the heat exchanging function of friction pair part and convection current ability strengthen greatly, thus improve the heat dissipation potential of clutch further.The radiating effect is synchronously combined then better at friction plate.Simultaneously owing to all adds additional the depot fat amount of lubricating grease to the spring bearing of outside friction disc connecting sleeve 24 and clutch shaft bearing 243 and the second bearing 244 and the 4th bearing 131 between platen 13 and piston 12, improve the lubricating ability of bearing and reduce the heating of bearing, in addition piston cylinder 11 be directly installed on the first transmission device housing 41 on and there is good heat-conduction effect, contribute to the heat radiation of clutch equally.

The working procedure of clutch when being separated of the utility model embodiment one is: after Clutch Control air valve disconnects the pressurized air come by gas holder, pressurized air in the cavity that piston cylinder 11 is airtight with piston 12 is through controlling air pressure interface 115 quick backflow to controlling relief opening that air valve is communicated with air and outwards emptying, the end thrust pop-off of piston 12 right-hand member, Returnning spring 14 between platen 13 and inner attrition piece seat 21 relies on its own resilient that platen 13 is moved right after losing pressure, platen 13 overcomes the first seal ring 121 and the second seal ring 122 and cylindrical on piston by the 4th bearing 131 → piston 12 again, endoporus and piston cylinder 11 respective interior bores, till frictional force between cylindrical moves right to and contacts with piston cylinder 11 interior edge face, the inner attrition piece 22 of original axial compression successively, outside friction disc 23 unclamps fast and is separated, make to be fixedly connected with coupling shaft 3 and unpowered transmission between the inner attrition piece seat 21 be slidably connected with the internal spline of inner attrition piece 22 and the outside friction disc connecting sleeve 24 be connected with the spline slide of outside friction disc 23, thus the second transmission device 5 making the power on coupling shaft 3 be connected with outside friction disc connecting sleeve 24 disconnects, other work or transmission device of connecing is attached thereto to be separated.When clutch separation state, in, although have certain gap between outside friction disc but relatively rotate and the less sliding friction of the friction torque belonging to dry friction and formed and generating heat because having, the first guide rib 241 now on outside friction disc connecting sleeve 24 cylindrical and the first air guide sleeve 15 are because losing water conservancy diversion effect without relatively rotating, but still the first vent hole 211 on the inner attrition piece seat 21 continuing rotation can be relied on, second vent hole 212, pod apertures 133 on 3rd vent hole 213 and guiding gutter 214 and platen 13 plays the heat storage capacity of stream guidance and other part and reaches good radiating effect.

After have employed the structure of the present embodiment, because the direct location and installation of piston cylinder 11 is on the bearing hole end face of the housing 41 of the first transmission device, eliminate the spring bearing of original piston cylinder and the oil sealing base of the first transmission device, avoid former spring bearing and will bear crooked extra to the spring bearing carrying moment of larger piston reverses direction thrust and piston cylinder rotation preventive mechanism and the heating caused and wearing and tearing, what also make the piston cylinder 11 inner ring outside diameter D2 in U-shaped cross section to do is less, thus make the effective active area of piston 12 larger, friction clutch with original same specification then external diameter of comparing is less, length is shorter, make structure not only simple but also compact, and the simple and firm position of the installation of piston cylinder 11, again reduce cost of production simultaneously.There is water conservancy diversion to hold concurrently the first air guide sleeve 15 of protective equipment owing to adding, can use under the environment of rain and dust, both improve adaptive capacity to environment and turn improve heat dissipation potential, first air guide sleeve 15 also can be laid down when not removing other structures easily, to observe friction disc wear situation and to clear up the impurity on clutch inside and filter screen with pressurized air.Owing to increasing the lubricating grease storage space of several bearing and can supplement easily in time as required, effectively improve the lubricating ability of bearing, decrease heating value, also improve its bearing capacity and working life simultaneously.Platen 13, outside friction disc 23, outside friction disc connecting sleeve 24 and inner attrition piece seat 21 all take effective wind-guiding heat extraction measure, coordinate the first air guide sleeve 15 and the first new ventilation slot 116 on it, the heat dissipation potential of clutch improves greatly, also improves working life and the reliability of its entirety simultaneously.Before employing, rear two-part is arranged, be convenient to install, maintenance and maintenance, reduce manufacturing cost and use cost, with important technological parameters dynamic torque for 600Nm, it is example that the piston cylinder of rated speed to be 2000rpm and bleed pressure be certain brand external of 0.6MPa rotates air pressure friction clutch, its outer diameter D 1=168mm, length L=138mm (not comprising the bearing cap of transmission device), weight is about 15kg, and the outer diameter D 1=140mm of the fixed air pressure multi-disc friction clutch of the piston cylinder of same specification technical parameter of the present utility model, length L=81mm (having comprised the bearing cap of the first transmission device), weight is about 9kg, comparatively speaking particularly length and quality reduce clutch boundary dimension of the present utility model significantly, the Mold processing minimizing of clutch to coupling shaft is made also to reduce the additional load of the respective support bearing of the first transmission device simultaneously and reduce its heating and wear and tear and improve working life, the rotary inertia of corresponding clutch driven end also reduces, be conducive to reduce clutch in conjunction with time unit friction work, reduce wearing and tearing and the heating of friction plate, also can accelerate in conjunction with speed, improve the working life of friction plate simultaneously.Comprehensive above feature, it is good that clutch of the present utility model has compact structure, heat radiation and barrier propterty, purchase, maintain and maintenance cost low, wide accommodation, has good performance advantage and good economic benefit.

As shown in Figure 2, it is the sectional drawing of the fixed air pressure multi-disc friction clutch of piston cylinder of the utility model embodiment two, air pressure multi-disc friction clutch adopts forward and backward two-part structure, comprise front segment structure, rear section structure and coupling shaft 3, wherein front segment structure comprises piston cylinder 11, piston 12, platen 13, Returnning spring 14, first air guide sleeve 15, second air guide sleeve 16, and rear section structure comprises inner attrition piece seat 21, multiple inner attrition piece 22, multiple outside friction disc 23, outside friction disc connecting sleeve 24; Coupling shaft 3 is supported on the corresponding bearing hole of housing 41 of the first transmission device (the 3rd bearing 42 is the first back shaft bearing member) by the 3rd bearing 42 of the first transmission device, coupling shaft 3 can be the input shaft of the first transmission device, also can be output shaft.

The annexation of piston cylinder 11 and the first transmission device comprises: piston cylinder 11 is located end face 118 by the second annular stopper 117 and the 6th and is arranged on the corresponding annular boss of oil sealing base 44 and end face, locate at oil sealing base 44 and the 6th of piston cylinder 11 and the corresponding end face of end face 118 is provided with 2-3 the second straight pin 441 be fixedly connected with and the hole transition fit corresponding with piston cylinder 11 is connected, to ensure the axis of piston cylinder 11 and circumferencial direction location reliably.Less and decrease axial dimension to the variation of the first transmission device, install also more convenient, decrease material cost, processing charges, part cost and assembly fee use, reduce cost and improve operational safety.Piston cylinder 11 is owing to eliminating spring bearing, avoid former spring bearing and while rotating, also will will bear the reaction force of air pressure and possible when mounted crooked the produced additional moment of former piston cylinder rotation preventive mechanism and the bearing heating that causes and wearing and tearing, the cross section of piston cylinder 11 is that U-shaped is to avoid former piston and seal ring thereof to expose and to make piston effective active area maximum simultaneously.

Piston 12 comprises with the annexation of piston cylinder 11: piston 12 is provided with the first seal ring 121 and the second seal ring 122, the inner ring of piston 12 is connected with piston cylinder 11 slipper seal with the second seal ring 122 respectively by the first seal ring 121 with outer ring, first seal ring 121 and the second seal ring 122 can select O RunddichtringO, and its cost is low and be convenient to maintain and replace.2-3 the first straight pin 114 (the first straight pin 114 is the first rotation preventive mechanism) be fixedly connected with is provided with at the interior edge face of piston cylinder 11, first straight pin 114 slides in the corresponding hole of the end face of piston 12, for the spline of piston 12, in case piston 12 rotates with platen 13 when bearing air pressure and moving and damages the inner side surface in the first seal ring 121 and the second seal ring 122 and the corresponding U-shaped cross section of piston cylinder 11.

Platen 13 comprises with the annexation of piston 12: platen 13 is connected with piston 12 (the 4th bearing 131 is the second back shaft bearing member) by the 4th bearing 131, in 4th bearing 131, outer ring is located by connecting to the corresponding cylindrical of platen 13 and the respective interior bores transition fit of piston 12 respectively, 4th bearing 131 is the single-row angular contact ball bearing of dual face seals, to bear the axial pressure from piston 12 while rotating, can to annotate when dispatching from the factory a certain amount of lubricating grease, need to adopt special tool to supplement from oil seal lip by professional workforce within maintenance period, to ensure the lubrication heat dissipation potential of the 4th bearing 131, bearing capacity and working life.

The radial circumference direction of platen 13 is provided with several pod apertures 133, these pod apertures 133 can be the straight line shape vertical with coupling shaft 3 or helical, to form the function of similar fan to improve flow-guiding radiation ability, the left side of platen 13 can also be heat-treated and directly be contacted with the friction facings of rightmost outside friction disc 23 is dynamic to replace inner attrition piece 22 with fine finishing, has saved the axial dimension that cost also shortens clutch.

The second vent hole 212 being provided with several radial directions is increased at each external splines groove bottom of inner attrition piece seat 21, web near the internal spline of inner attrition piece seat 21 is provided with the 3rd vent hole 213 of several axis and through with the second vent hole 212, the external splines of inner attrition piece seat 21 and the internal spline of inner attrition piece 22 are slidably connected, the external splines of inner attrition piece seat 21 is that rectangular spline is convenient to process with the splined shaft hob of standard to improve work efficiency and precision, be convenient to the drilling of the second vent hole 212 bottom spline simultaneously, avoid the spline of other type to be scratched by the spline flank of tooth when processing the second vent hole 212 because teeth groove is narrower produce burr inconvenience cleaning and affect inner attrition piece 22 slip thereon, also avoid simultaneously and bore flower in the phenomenon adding easy-rupturing in man-hour, save processing cost and improve operational safety.

Inner attrition piece seat 21 comprises with the annexation of coupling shaft 3: first of inner attrition piece seat 21 locates end face 215 and bearing position makes whole part axial size shorten relative to large end face indent, the axle head external splines static connection that its internal spline is corresponding to coupling shaft 3, the right side of internal spline and the left side of the second spacer 216 are adjacent to, the right side of the second spacer 216 and the 5th of coupling shaft 3 axle head external splines ending place the is located end face 33 and is adjacent to, by the cumulative error using the second spacer 216 of different-thickness size to carry out free size chain, for ensureing the relative position size of clutch front section and hindfoot portion, avoid the stroke of piston 12 excessive or too small and the normal combination affecting friction plate be separated.

Inner attrition piece 21 comprises with the annexation of platen 13: on the end face that the right side of platen 13 is adjacent with inner attrition piece, be also provided with the rectangle internal spline 136 being convenient to shaping, can slide on the corresponding external splines of inner attrition piece seat 21 (internal spline 136 and the corresponding external splines of inner attrition piece seat 21 are the second rotation preventive mechanism), as the rotation preventive mechanism of platen 13 relative to inner attrition piece seat 21, there are wearing and tearing and heating that spline reliably causes to prevent platen 13 from producing unnecessary trackslipping in friction plate cohesive process and the cohesive process of friction plate can be accelerated, Returnning spring 14 is contained in the respective aperture of platen 13 and inner attrition piece seat 21, automatically reseting in impact and separation process is slowed down in the process combined at friction plate for platen 13.

Outside friction disc 23 comprises with the annexation of outside friction disc connecting sleeve 24: the external splines that outside friction disc 23 and outside friction disc connecting sleeve 24 are slidably connected adopts wide tooth narrow groove type rectangle keyway, also have several straight shapes/or spiral groove in its both sides friction facings radial direction, similar fan functionality is carried out water conservancy diversion and doubles as to hold dirty groove, improves the friction, capability of heat dissipation potential and guarantee friction plate, the spline that outside friction disc connecting sleeve 24 and outside friction disc 23 are slidably connected adopts the sipes narrow flute profile rectangular spline through with cylindrical to be conducive to the heat radiation of friction plate to make as much as possible being exposed to outward of the spline tooth of outside friction disc 23, the interior large end face of outside friction disc connecting sleeve 24 is convenient to the direct stationary contact of friction facings with outside friction disc 23 through fine finishing, also the spline tooth cylindrical axial direction of outside friction disc connecting sleeve 24 be provided with double as fan blade parallel/or spiral helicine first guide rib 241, both the intensity of spline tooth had been strengthened, formed with the first air guide sleeve 15 and force water conservancy diversion effect again in conjunction with the second vent hole 212 on inner attrition piece seat 21 preferably, pod apertures 133 on 3rd vent hole 213 and platen 13 is with the hot gas 70 of sucking-off clutch inside, the heat exchanging function of friction pair part and convection current ability are strengthened greatly, thus improve the heat dissipation potential of clutch further.

Outside friction disc connecting sleeve 24 comprises with the annexation of inner attrition piece seat 21: the spring bearing bore portion on outside friction disc connecting sleeve 24 is to projecting inward, shorten the axial dimension of this part entirety, a circlip for hole 248 is provided with in the middle of bearing hole, the corresponding end-faces of the outer ring of clutch shaft bearing 243 and the second bearing 244 is close to circlip for hole 248 two ends (clutch shaft bearing 243 and the second bearing 244 are the 3rd back shaft bearing member), an annular rib 249 is provided with at the bearing hole interior edge face of outside friction disc connecting sleeve 24, the left side of annular rib 249 is close in the right side of the second bearing 244 outer ring, so that two bearings can bear the large interior edge face axial force left from outside friction disc connecting sleeve 24 simultaneously, the inner ring of two bearings separates with the first spacer 245 and transition fit is arranged on the corresponding bearing position of inner attrition piece seat 21 and the first location end face 215, increase the depot fat space of clutch shaft bearing 243 and the second bearing 244, clutch shaft bearing 243 and the second bearing 244 can adopt sealing radial ball bearing or the single facer angular contact ball bearing of single facer, seal gease more more than hermetic two bearings can be added when assembling, improve lubrication heat dissipation potential and the bearing capacity of bearing, and proper extension its maintenance period, also can special tool be adopted to supplement from bearing sealed ring lip by professional workforce within maintenance period, to ensure the lubrication heat dissipation potential of these two bearings, bearing capacity and working life, in practical application, the thickness of the first spacer 245 can be changed to adjust the axial pretightening degree of two bearings according to the size of load, make this duplex bearing supporting structure comparatively large at the shortest and support stiffness of axial dimension, to bear from the axis of the second outer connecting device 5 and radial force and the end thrust from piston 12.

Outside friction disc connecting sleeve 24 comprises with the annexation of the second transmission device 5: the outer connecting end surface 247 of outside friction disc connecting sleeve 24 is provided with adapt with the connection interface of the second outer connecting device 5 outer and is connected seam 2471 (/ or boss) and tapped hole, be convenient to directly connect various outer connecting device, the second outer connecting device 5 can be belt pulley/or sprocket wheel/or gear.

Wherein: the outer connecting end surface 247 of the contact of outside friction disc connecting sleeve 24 and the second transmission device 5 is 11 ~ 19mm to the distance of the large end face of inner attrition piece seat 21, the degree of depth being the screw thread that the second transmission device 5 is connected with outside friction disc connecting sleeve 24 adds outside friction disc connecting sleeve 24 and the clearance distance (0.5mm-1mm) of the large end face of inner attrition piece seat 21, saves the axial dimension of clutch to greatest extent; In addition, the large end face indent of distance relative to inner attrition piece seat 21 of end face 215 is located in first of the contact of inner attrition piece seat 21 and clutch shaft bearing 243, indent is of a size of the thickness of clutch shaft bearing 243 more than, the corresponding bearing hole the inner of outside friction disc connecting sleeve 24 that makes also concaves corresponding distance, makes and reduce further the axial dimension of clutch.To sum up, also be outer connecting end surface 247 indent of the relative outside friction disc connecting sleeve 24 of the first location end face 215 of inner attrition piece seat, the size of indent is more than or equal to the thickness size of the 3rd spring bearing, namely the thickness sum of clutch shaft bearing 243, first spacer 245 and the second bearing 244 is more than or equal to, within making clutch shaft bearing 243 and the second bearing 244 be arranged on the outer connecting end surface 247 of outside friction disc connecting sleeve 24, thus the axial dimension of further less clutch.

Coupling shaft 3 comprises with the annexation of rear section structure: at the external thread of shaft end place of coupling shaft 3 by back-up ring 33, nut 34 and corresponding spring washer (not shown) thereof lock, the right large end face of back-up ring 33 is close to the inner ring exterior edge face of clutch shaft bearing 243, make the good rigidly of the axial restraint of the inner ring of clutch shaft bearing 243 and the second bearing 244 on inner attrition piece seat 21 and the axial restraint of inner attrition piece seat 21 on coupling shaft 3 reliable again, in ensure that, the stability that outside friction disc combines is in order to avoid produce unnecessary wearing and tearing and heating, improve working life and the reliability of friction plate, simultaneously parts machining process is good and cost is low.

Install at piston cylinder 11 cylindrical left end the first air guide sleeve 15 that screw mode connects additional and doubled as protective housing, the cylindric left part of the first air guide sleeve 15 and the appropriate section of outside friction disc connecting sleeve 24 cylindrical are the protection interface 151 of the gap interface of interior straight L shape, make that the technology capability of the first air guide sleeve 15 is good, cost is low and have possessed good waterproof and dustproof and degassing function.

Several the 3rd guide ribs 51 are provided with at the right large end face of the second transmission device 5, also be provided with several second guide ribs 53 at its spoke plate left end to hold concurrently stiffening rib and several the 4th vent holes 52, second air guide sleeve 16 is provided with between the 3rd guide rib 51 and piston cylinder 11 right-hand member cylindrical, second air guide sleeve 16 is fixedly connected on piston cylinder 11 right-hand member cylindrical with several first screws 163 and is also also provided with several the second new ventilation slots 162 at its right-hand member, and each second new ventilation slot 162 has installed additional the second filter screen 161 of welding/or bonding/or riveted joint.

First air guide sleeve 15 can be laid down easily after dismounting second transmission device 5, so that observe friction disc wear situation and with pressurized air cleaning clutch inside impurity, find that friction plate has certain wearing and tearing if observe, then can unload the nut 34 of clutch, back-up ring 33 and corresponding spring washer, then from coupling shaft 3 external splines, inner attrition piece seat 21 is unloaded gently, now clutch hindfoot portion is separated with front section, inner attrition piece 22 and outside friction disc 23 can thoroughly be cleared up in time on request and exchange, extend the working life of friction plate like this, also the working service cost of clutch is greatly reduced, if now discovery friction plate has serious wear, can change in time, avoid the impact on using function, also can check clutch front section further simultaneously, cleaning, in time carry out lubricating grease to the mounting groove of the 4th bearing 131 between platen 13 and piston 12 and the first seal ring 121 and the second seal ring 122 to supplement, effectively can ensure the 4th bearing 131, the working life of the first seal ring 121 and the second seal ring 122, if find the 4th bearing 131, first seal ring 121 or the second seal ring 122 serious wear, then can change in time, the effect that the judicial convenience of M R brings thus is the whole service life and the reliability that improve clutch, reduce user cost simultaneously.

The clutch of the utility model embodiment two in conjunction with time working procedure be; the axial force of the pressurized air connected by Clutch Control air valve through controlling to produce after air pressure interface 115 enters into cavity airtight with piston in piston cylinder 11 promotes piston 12 and is moved to the left, piston 12 overcomes the first seal ring 121 and the second seal ring 122 and cylindrical and endoporus and piston cylinder 11 respective interior bores on it, frictional force between cylindrical passes through the 4th bearing 131 by axial force transmission again on platen 13, while platen 13 compression reseting spring 14 and successively first outside friction disc → second, outside friction disc → the right, second, the right first inner attrition piece → the right inner attrition piece on the right of axial compression ... until be pressed to Far Left a slice outside friction disc on the large interior edge face of outside friction disc connecting sleeve 24, straight this n inner attrition piece and n-1 outside friction disc all compress, make to be fixedly connected with coupling shaft 3 and the inner attrition piece seat 21 be slidably connected with the internal spline of inner attrition piece 22 and the outside friction disc connecting sleeve 24 that is connected with outside friction disc 23 spline slide combine, thus make the transmission of power on coupling shaft 3 to the second transmission device 5 be connected with outside friction disc connecting sleeve 24, to drive other equipment or transmission device.Just start at friction pair to produce more heat due to the existence of unit friction work in the process combined, a part by passages such as the second vent hole 212 on inner attrition piece seat 21 and the 3rd vent holes 213 by the cavity pod apertures 133 water conservancy diversion had on the platen 13 of fanning effect to first guide rib 241 and the first air guide sleeve 15 of outside friction disc connecting sleeve 24, another part then by the friction facings radial direction on outside friction disc 23 both sides arrange multiple there is fan functionality lineal shape/or spiral groove water conservancy diversion drain into this place by the keyway on outside friction disc connecting sleeve 24 cylindrical, then combine at the first guide rib 241 and the hot gas at above-mentioned two places and friction plate group be guided to protection interface 151 place in the lump at the hot gas at outside friction disc connecting sleeve 24 outer ring place under the effect of the first air guide sleeve 15 and discharge, the water conservancy diversion effect that the second air guide sleeve 16 that the 3rd guide rib 51 meanwhile on the second transmission device 5 is fixedly connected with piston cylinder 11 right-hand member cylindrical is formed sucks the heat radiation of new wind 60 part for the second transmission device 5 self from the second new ventilation slot 162, another part makes its surface cooling after clutch surface passes through, again inner for the clutch of discharging from protection interface 151 hot gas 70 is discharged hot gas 70 by the guide functions of the second guide rib 53 on the second transmission device 5 spoke plate further by the 4th vent hole 52 again in the mode accelerating convection current simultaneously, so far the inner hot gas 70 of clutch major part discharge, remaining partial heat then outer friction plate connecting sleeve 24, friction plate combines, part such as inner attrition piece seat 21 grade is stored and is progressively distributed by surrounding atmosphere.After adopting above technology, the heat exchanging function of friction pair part and convection current ability strengthen greatly, thus improve the heat dissipation potential of clutch further.The second filter screen 161 that second new ventilation slot 162 installs additional for ensureing the suction stoping dust and foreign matter while new wind 60 sucks, to ensure the normal use of friction plate; The radiating effect is synchronously combined then better at friction plate.Simultaneously owing to adds additional the depot fat amount of lubricating grease to the spring bearing of outside friction disc connecting sleeve 24 and clutch shaft bearing 243 and the second bearing 244, improve the lubricating ability of bearing and reduce the heating of bearing, piston cylinder 11 directly contacts with the oil sealing base 44 of transmission device and has good heat-conduction effect in addition, to carry out the heat radiation of assisted clutch by means of the accumulation of heat of transmission device and radiation function.

The working procedure of clutch when being separated of the utility model embodiment two is: after Clutch Control air valve disconnects the pressurized air come by gas holder, pressurized air in the cavity that piston cylinder 11 is airtight with piston 12 is through controlling air pressure interface 115 quick backflow to controlling relief opening that air valve is communicated with air and outwards emptying, the end thrust pop-off of piston 12 right-hand member, Returnning spring 14 between platen 12 and inner attrition piece seat 21 relies on its own resilient that platen 13 is moved right after losing pressure, platen 13 overcomes the first seal ring 121 and the second seal ring 122 and cylindrical on piston by the 4th bearing 131 → piston 12 again, endoporus and piston cylinder 11 respective interior bores, till frictional force between cylindrical moves right to and contacts with piston cylinder 11 interior edge face, the inner attrition piece 22 of original axial compression successively, outside friction disc 23 unclamps fast and is separated, make to be fixedly connected with coupling shaft 3 and unpowered transmission between the inner attrition piece seat 21 be slidably connected with the internal spline of inner attrition piece 22 and the outside friction disc connecting sleeve 24 be connected with the spline slide of outside friction disc 23, thus the second transmission device 5 making the power on coupling shaft 3 be connected with outside friction disc connecting sleeve 24 disconnects, other work or transmission device of connecing is attached thereto to be separated.When clutch separation state, although have certain gap between inside and outside friction plate but relatively rotate and the less sliding friction of the friction torque belonging to dry friction and formed and generating heat because having, the first guide rib 241 now on outside friction disc connecting sleeve 24 cylindrical and the first air guide sleeve 15 force water conservancy diversion effect because losing without relatively rotating, but still the pod apertures 133 on the second vent hole 212, the 3rd vent hole 213 and the platen 13 on the inner attrition piece seat 21 continuing rotation can be relied on to play the heat storage capacity of stream guidance and other part and reach good radiating effect.

The utility model embodiment one is with the difference of embodiment two:

1. the outside friction disc connecting sleeve 24 in embodiment two and the protection interface 151 between the first air guide sleeve 15 left end are interior straight L shape gap interface, and the protection interface 151 in embodiment one is outer oblique L shape gap interface, the protection interface 151 in embodiment one on the clutch half part protection effect and overall exhaust effect more better.

2. the axially locating of outer ring in outside friction disc connecting sleeve 24 bearing hole of the clutch shaft bearing 243 in embodiment two and the second bearing 244 realizes with a circlip for hole 248 and annular rib 249, and the axially locating of outer ring in outside friction disc connecting sleeve 24 bearing hole of clutch shaft bearing 243 in embodiment one and the second bearing 244 is first annular boss 242 by outside friction disc connecting sleeve 24 is provided with realizes, manufacturability in embodiment two is better, the larger axis that two bearings can bear left is simultaneously moved, static load, but the axis of bearing to the right is moved, static load ability is not as good as embodiment one, be applicable to inner attrition piece seat without the large step of left end and outer connecting device is the occasion of belt pulley/or gear/or sprocket wheel, and boss positioning and rigid in embodiment one is better, certain bi-directional axial can be born move, static load, be more suitable for the occasion that outer connecting device is transmission shaft or coupling.

3. on outside friction disc connecting sleeve 24, be provided with grease nipple 246 in embodiment one, to be convenient to regularly add lubricating grease to clutch shaft bearing 243 and the second bearing 244 at ordinary times, to bring larger convenience to M R, and in embodiment two, this structure is not set.

4. be provided with the second air guide sleeve 16 in embodiment two, second air guide sleeve 16 is straight tubbiness, the water conservancy diversion effect that the second air guide sleeve 16 be fixedly connected with piston cylinder 11 right-hand member cylindrical by the 3rd guide rib 51 on the second transmission device 5 is formed sucks the heat radiation of a new wind part for the second transmission device 5 self from the second new ventilation slot 162, another part makes it lower the temperature after clutch surface passes through, again inner for the clutch of discharging from protection interface 151 hot gas 70 is discharged further by the 4th vent hole 52 by the guide functions of the second guide rib 51 on the second transmission device 5 spoke plate in the mode accelerating convection current again simultaneously, the second filter screen 161 that second new ventilation slot 162 installs additional is for ensureing the suction stoping dust and foreign matter while new wind sucks, to ensure the normal use of friction plate, being best suited for the second transmission device is belt pulley, the occasion of sprocket wheel or gear, but structure is more complicated, and in embodiment one, be not provided with the second air guide sleeve, be best suited for the occasion that connection for transmission axle is also applicable to belt pulley, sprocket wheel or gear, but to the radiating effect of belt pulley, sprocket wheel or gear not as good as embodiment two.

5. the location of the clutch shaft bearing 243 inner ring exterior edge face in embodiment two adopts back-up ring 33, spring washer (not shown) and nut 34 and locks at the corresponding outside thread place of coupling shaft 3, and the location of clutch shaft bearing 243 inner ring exterior edge face adopts locking nut 32 in embodiment one, the structure of embodiment two has good manufacturability low cost and other advantages, but does not have that embodiment's one is simple and reliable for structure.

6. the inner attrition piece seat 21 in embodiment two is good without himself structure simple process after large step, but the friction facings of the outside friction disc 23 of most the first from left sheet directly contacts with the large interior edge face of outside friction disc connecting sleeve 24 is quiet, need to carry out fine finishing to the large interior edge face of outside friction disc connecting sleeve 24, add the process costs of outside friction disc connecting sleeve 24; And the inner attrition piece seat 21 in embodiment one has large step, and its large interior edge face is heat-treated contact to replace the friction facings of a slice inner attrition piece 22 with fine finishing, add a rubbing surface relative to embodiment two in embodiment one, make the transmission capacity of its moment of torsion better; Add the guiding gutter 214 on end face in another embodiment one relative to the inner attrition piece seat 21 of embodiment two, result of ventilating heat dissipation wants relatively more better.

7. the location of inner attrition piece seat 21 on coupling shaft 3 in embodiment two be by the second spacer 216 be adjacent to the external splines afterbody of coupling shaft 3 the 5th location end face 33 realize, and the location of inner attrition piece 21 on coupling shaft 3 in embodiment one is adjacent to by the second spacer 216 circlip for shaft 31 be linked on coupling shaft 3 to realize, structure in embodiment one can make embodiment two compared with the diameter of the coupling shaft 3 corresponding with piston cylinder 11 can be less, the inner ring of piston cylinder 11 is made to compare embodiment two less, also the intracavity section of piston cylinder 11 is made to compare embodiment two larger, thus make the structure in embodiment one stronger than embodiment two to the transmission capacity of moment of torsion.

8. the spline in embodiment one between platen 13 and inner attrition piece seat 21 adopts spring guide 135 as spline cover, and the external splines that the spline in embodiment two between platen 13 to inner attrition piece seat 21 adopts the internal spline that arranges on platen 13 corresponding with inner attrition piece seat 21 is connected and realizes, the structure in embodiment one is compared the simpler and axial dimension of embodiment two technique and is further shortened.

9. be provided with the second oil sealing 132 between platen 13 and piston 12 in embodiment one, and this structure is not set in embodiment two, embodiment two clutch in conjunction with time to bear larger the 4th bearing 131 from piston axial force lubrication only by dispatching from the factory time a certain amount of lubricating grease of adding realize, and embodiment one can also store lubricating grease in the second oil sealing 132, therefore embodiment one compares embodiment two, its radiating effect, bearing capacity, working life and maintainability are all better.

10. in embodiment one, piston cylinder 11 locates end face 111 by second, on corresponding bearing hole and end face and by bolt 113 spline having installed bonded washer 1131 additional on the housing 41 that second annular boss 112 is arranged on the first transmission device, in embodiment two, piston cylinder 11 is located by connecting by the second annular stopper 117 and the 6th location end face 118 and the bearing cap of the first transmission device and by several the second straight pin 441 spline be connected on bearing cap, embodiment two compares in embodiment one without the bolt seal problem be directly connected with the housing 41 of the first transmission device, but embodiment one is simpler than the structure of embodiment two and reliable.

Above content is in conjunction with concrete preferred implementation further detailed description of the utility model, can not assert that concrete enforcement of the present utility model is confined to these explanations.For the utility model person of ordinary skill in the field; without departing from the concept of the premise utility; some equivalent to substitute or obvious modification can also be made, and performance or purposes identical, all should be considered as belonging to protection domain of the present utility model.

Claims

1. the fixed air pressure multi-disc friction clutch of piston cylinder, be connected between the first transmission device and the second transmission device, it is characterized in that, comprise front segment structure, rear section structure and coupling shaft, wherein said first transmission device is connected to the first end of described coupling shaft by the first back shaft bearing member, described second transmission device is arranged on the second end of described coupling shaft, described coupling shaft runs through described front segment structure and described rear section structure, and described front segment structure comprises piston cylinder, piston, platen and Returnning spring; Described rear section structure comprises inner attrition piece seat, multiple inner attrition piece, multiple outside friction disc and outside friction disc connecting sleeve;

2. air pressure multi-disc friction clutch according to claim 1, it is characterized in that, described 3rd back shaft bearing member comprises clutch shaft bearing and the second bearing, the first spacer is provided with between the inner ring of described clutch shaft bearing and described second bearing, described clutch shaft bearing and described second bearing are single facer radial ball bearing or single facer angular contact ball bearing, described outside friction disc connecting sleeve is provided with the first annular boss, described first annular boss is arranged between described clutch shaft bearing and described second bearing to locate described clutch shaft bearing and described second bearing, described first annular boss is provided with the first arc groove.

3. air pressure multi-disc friction clutch according to claim 1, it is characterized in that, the surface of contact of described inner attrition piece seat and described 3rd back shaft bearing member is relative to the surface of contact indent of described outside friction disc connecting sleeve and described second transmission device, and wherein the size of indent is more than or equal to the thickness size of described 3rd back shaft bearing member.

4. air pressure multi-disc friction clutch according to claim 1, is characterized in that, the internal diameter of the inner ring of described piston cylinder is than 0.1 ~ 0.25mm large with the external splines external diameter of described piston cylinder corresponding part on described coupling shaft.

5. air pressure multi-disc friction clutch according to claim 1, is characterized in that, the end face of described platen directly contacts the outside friction disc of the first side in described multiple outside friction disc; The end face of described inner attrition piece seat or described outside friction disc connecting sleeve directly contacts the outside friction disc of the second side in described multiple outside friction disc.

6. air pressure multi-disc friction clutch according to claim 1, it is characterized in that, cavity place between described platen and described piston is provided with the second oil sealing, and described second back shaft bearing member is the single-row angular contact ball bearing of single facer or the single-row radial ball bearing of single facer.

7. air pressure multi-disc friction clutch according to claim 1, it is characterized in that, rotation preventive mechanism is provided with between described piston and described inner attrition piece seat, described rotation preventive mechanism is included in multiple spring guides that described platen is fixedly connected with, and described spring guide can slide in the respective aperture of described inner attrition piece seat; Described Returnning spring relative set is multiple, and Returnning spring described in each is arranged in corresponding spring guide.

8. air pressure multi-disc friction clutch according to claim 1, it is characterized in that, the radial circumference direction of described platen arranges multiple pod apertures, second vent hole of multiple radial direction is set at the external splines groove bottom of described inner attrition piece seat, the web of the internal spline near described inner attrition piece seat arranges multiple the 3rd axial vent hole, the cylindrical of the spline tooth of described outside friction disc connecting sleeve arranges multiple first guide rib, space between multiple described first guide rib, multiple described pod apertures, multiple described second vent hole and multiple described 3rd vent hole mutually through.

9. the air pressure multi-disc friction clutch according to any one of claim 1 to 8, it is characterized in that, between described piston cylinder and the cylindrical of described outside friction disc connecting sleeve, the first air guide sleeve is set, described first air guide sleeve is fixedly connected with described piston cylinder, and described first air guide sleeve and described outside friction disc connecting sleeve form the protection interface of L shape.

10. air pressure multi-disc friction clutch according to claim 9, is characterized in that, has multiple first new ventilation slot in the junction of described first air guide sleeve and described piston cylinder, and described multiple first new ventilation slot is provided with the first filter screen.