The friction clutch hydraulic clutch is handled the separating mechanism of usefulness
The present invention relates to a kind of motor vehicle friction clutch hydraulic clutch and handle the separating mechanism of usefulness, it is contained in clutch housing inside, friction clutch disposes with one heart with a live axle that is connected internal-combustion engine and speed changer, separating mechanism comprises a pressure shell that adds that is fixed on the transmission case, can in adding pressure shell, guide movably by the pressure fluid loaded piston for one, piston is set up by clutch bearing and friction clutch and is got in touch, the pressure fluid of separating mechanism load by one with add the integrated type pressure tap that pressure shell is connected and carry out, pressure tap is passed the hole guiding of clutch housing hermetically, and there is a pipe joint its end.
In the hydraulic operation clutch system of automobile such requirement is arranged, the pressure fluid that promptly is used to handle separating mechanism or splitter cylinder will pass the hole guiding in the clutch housing.For avoid dust, water or other dirts invade and thereby guarantee that friction clutch works without barrier, require the hole in this clutch housing of sealing.Consider and simplify assembling and as the member such as the clutch housing of foundry goods design with add pressure shell bigger tolerance is arranged, require pipeline can be contained in different positions that so a bigger hole need be arranged, this hole requires sealing effectively in clutch housing.
By known a kind of this type of the separating mechanism of patent document US 4609087, for its pressure tap sets a special piping erection structure in clutch housing.Seal disc by plastics forming is used for sealing, and the free end that seal disc stretches out from clutch housing with respect to pressure tap is contained in position radially darker in the clutch housing.This Seal Design might enter in the chamber that forms between clutch housing external frame and the seal arrangement dirt.Accumulate in dirt, the especially dust of seal arrangement top, with situation that moisture combines under may cause seal arrangement to move and thereby make other dirts invade clutch housing unobstructedly.
In addition, the hand assembled that known seal arrangement need bother put the Sealing of the expansion free end by pressure tap in when assembling.Exist such danger in this case, promptly Sealing is by overdistension or plastic deformation, and thereby can not satisfy the seal arrangement requirement.Therefore, need a kind of elastomeric material for this type of seal arrangement, thereby increased cost of material unfriendly.
Therefore, technical disadvantages from known arrangement, the purpose of this invention is to provide a kind of friction clutch hydraulic clutch and handle the separating mechanism of usefulness, it have can the automation assembling seal arrangement, this seal arrangement can be with a kind of cheap and good-quality made.
By the present invention, provide a kind of like this friction clutch hydraulic clutch that starts described type to handle the separating mechanism of usefulness for achieving the above object: take over for sealing load and be provided with Sealing divided into two parts, the segmentation of Sealing in installment state for passing place, the separatrix sealing that pressure tap is stipulated; Closure member abuts on the clutch housing at mounted state; Closure member rests on the clutch housing by flexible external edge; In contained district, separatrix, overlap mutually between the regulation segmentation; And for segmentation shape is located sealedly, pressure tap has a circular groove.
Can assemble automatically by favourable mode by design of the present invention.Cutting apart of closure member, might make each segmentation of closure member and the irrespectively preferably portable assembling of moulding of pressure tap by of the present invention.As the further measure that reduces cost be, can be with a kind of cheap made by the closure member of the present invention design.
Abut at the mounting point closure member on the inboard of clutch housing.Become the closure member of peviform in this case by means of preferred design, can reach the sealing that abuts under the pretightening force effect on the clutch housing, need not manually to carry out the adjustment again of closure member at the assembling condition of separating mechanism.The present invention equally also comprises this structure of closure member, and promptly its outside is bearing on the clutch housing.After installing separating mechanism, being assemblied in of this type of closure member finish from the part that clutch housing stretches out by closure member being contained in pressure tap.
The external edge of closure member is designed to flexible or flexible, can be whereby tolerance balancing better, and improve cooperating of surface structure that closure member and clutch housing do not process.In order to increase the elasticity of external edge, it is thin-walled that this external edge is designed to compare with the closure member remaining part.
Except elasticity or flexible external edge, be provided with at least one abutment wall by each segmentation of closure member of the present invention.These abutment wall that also can be described as strengthening rib are impelled and are improved shape stability, for the automation mechanized operation or the matching requirements of closure member have this shape stability.In addition, directed and insert abutment wall in the bore edges district in installment state along the direction of clutch housing, help closure member desired pre-centering in the hole of clutch housing.
Segmentation is designed to mutual overlap joint in the location, separatrix, has strengthened the effect by closure member of the present invention, avoids forming the boundary seam, because dirt might enter in the clutch housing by this seam.
Suggestion is designed to the chase mortise connection in overlap, and each segmentation obtains mutual supporting in the zone, separatrix thus.In addition, this measure is for being sealed with favorable influence.Another favourable design code of the present invention the safty device of segmentation in the zone, separatrix, it is designed to the sealed locking mechanism of shape.This closure member is fixed on the pressure tap when the preassembly reliably by means of the sealed locking mechanism of shape, so closure member gets loose on pressure tap or the danger of displacement is automatically prevented effectively in the assembly process of whole separating mechanism.
Substitute the sealed kayser of shape and connect, the present invention equally also is included in the non-disconnectable formula connection of two segmentations in the zone, separatrix.For this reason, relevant with the material selection of closure member, being adapted to pass through bonds or weld connects each segmentation.
A kind of best form of implementation of the present invention has been stipulated marginal trend for closure member, extends coaxially with live axle basically in the separatrix, mounting point of separating mechanism.Closure member by another kind of conceptual design of the present invention can have a kind of separatrix trend that is concentric with the live axle orientation.
In addition, this location can be replenished by means of a kind of rotation is fixing, and rotation is fixing to be boss or the fixed element that stretches out from closure member for example in form, and its shape is inserted in the corresponding groove of pressure tap sealedly.Different with it, the sealed connection of this shape equally can reverse design, at this moment, and in the groove of boss kayser that stretches out from pressure tap in the circular groove location in segmentation.
In addition, except that being located at the positioning device on the pressure tap of closure member, the present invention also comprises closure member fixing on clutch housing.What be suitable for is a safety element that stretches out on closure member for this reason, on the wall of its sealed ground of shape kayser of the mounting point of separating mechanism at clutch housing or in the breach of clutch housing.A kind ofly so also multiple measure can be set on closure member when needed, can make closure member seal to such an extent that abut on the clutch housing better.
As the material that is used for by closure member of the present invention or its segmentation, suitable is plastics, for example EPDM, TPE, PP, PE and PA.Irrespectively stipulate the shore hardness of these plastics≤60 with selected material.
Describe the present invention in detail by means of Fig. 1 to 8 below.Wherein:
Fig. 1 is by closure member of the present invention, and it is fixed on the separating mechanism;
Fig. 2 is along the line 2-2 among Fig. 1, and expression is by closure member of the present invention more enlargedly;
Fig. 3 presses the single partial graph of the closure member of Fig. 1;
The view of Fig. 4 single split;
Another segmentation of Fig. 5, it constitutes a closure member with the segmentation that is drawn among Fig. 4;
Fig. 6 is by the enlarged detail of closure member 6-6 along the line drawn in Figure 4 and 5;
Fig. 7 presses the detail drawing of Figure 4 and 5 7-7 along the line;
Fig. 8 closure member has a safety element that stretches out towards the direction of clutch housing.
What Fig. 1 represented to be in installment state can hydraulic operated separating mechanism 1, and it preferably uses in automobile.The structure of separating mechanism 1 comprises a piston-cylinder unit, and it is with one heart round live axle 2, and live axle couples together internal-combustion engine and speed changer, and they all do not have expression in Fig. 1.Add pressure shell 3 as cylinder, it detachably is fixed on the transmission case 4.Guide on the hole wall 5 that adds pressure shell 3 piston 6 outsides that are designed to annular piston, and guide on guide pin bushing 7 the inside.In order to constitute pressurizing chamber 8, guide pin bushing 7 has an annular flange flange 9 in speed changer one side, and it is contained in hermetically and adds between pressure shell 3 and the transmission case 4.The piston that is provided with piston sealing device 10 in pressure chamber one side is connected with clutch bearing 11 in that side back to pressure chamber 8, in installment state, is bearing on the friction clutch to the clutch bearing force closure.The working method of separating mechanism does not further specify, because it is consistent with known mechanism.
In order to add pressure fluid, add pressure shell 3 and be provided with an integrated type pressure tap 12 that extends radially to pressure chamber 8.In separating mechanism shown in Figure 11 mounting point, the free end of pressure tap 12 passes the hole 13 of clutch housing 14 and stretches out.The end of pressure tap 12 is provided with an elbow 15 that vertically refers to towards transmission case 4 directions, can connect a preferably flexible hydraulic tube on elbow.For the ease of the assembly automation of separating mechanism 1 and in order to compensate member that is the clutch housing 14 and the tolerance that adds pressure shell 3 with the casting material manufacturing, there is the size of an Overpressure of a safety valve adapter 12 or its elbow 15 needed structure spaces in hole 13.In order to provide hole 13 effective seal to be provided with a closure member 16 under separating mechanism 1 mounted situation, its shape is located sealedly and is fixed on and takes on 12.Fixing in order to guarantee closure member 16 with respect to the location and the rotation of taking over 12, to take over 12 and in circular groove 17 zones, be provided with the boss 18 that a part extends radially, its inserts on closure member 16 in the corresponding groove 19.In addition, closure member 16 also has an annular edge 20 that is designed to thin-walled to obtain flexible fringe area, and it can compensate the Roughness of clutch housing 14 casting surfaces, and thereby has improved the effect of sealing.In addition, closure member 16 also is provided with abutment wall 21,22, and they are orientated consistent with the bearing of trend of live axle 2 basically, and is abutting on the edge in hole 13 under the mounting point of closure member 16.Except that the effect that strengthens rigidity, abutment wall 21,22 another task are the centering auxiliary devices that constitute closure member 16 when separating mechanism 1 is installed.For this reason, there is inclined- plane 23,24 strengthening rib 21,22 ends.
Being shown among Fig. 2 of closure member 16 by other details table of the present invention.Fig. 2 represents to be designed to the dimeric closure member 16 that comprises segmentation 25,26.27 regional interior edge faces connect mutually round pressure tap 12 and in the separatrix on two segmentation 25,26 semicircle ground.For avoiding forming the boundary seam between the segmentation 25,26, segmentation 25 has a boss 28 that is overlapped on segmentation 26 ends.In addition, represented the mounting point of abutment wall 21,22 in Fig. 2, they abut on the sidewall in hole 13.
Fig. 3 represents the longitudinal section of closure member 16.Press Fig. 3, closure member 16 designs in the transition zone 33 of external edge 20 at one in such a way from the breach 29s that are used for pressure tap 12, and promptly the wall of closure member 16 is provided with strengthening rib 32.Wherein, strengthening rib 32 is arranged alternately in both sides, that is towards abutment wall 21 or towards the opposition side setting, and thereby has constituted a kind of box structure.The moulding of closure member 16 in transition zone 33 scopes can design arbitrarily as required.As being taken at circular groove 17 regional intrinsic pressures, closure member 16 obtains a kind of friction tight measure on 12, closure member 16 both sides in breach 29 locations respectively are provided with the annular protuberantia 30,31 of two projections in Fig. 3, and they are pressed against respectively on the wall of circular groove 17 (see figure 2)s.
Segmentation 25,26 by expression with spacing out in Figure 4 and 5, and they constitute closure member 16 jointly.Figure can find out some measures of having taked thus, and these measures are connected to each other segmentation 25,26 shapes or the local mutually overlap joint of the part of segmentation 25,26 and for fear of form the seam of demarcating in the zone of separatrix 27 sealedly.For this reason, segmentation 25 has boss 28,34,35,36, and they highly arrange with staggering, and thereby after being contained in segmentation 25,26 on the pressure tap 12 movably, guarantee adjacent portion overlap joint with segmentation 26.Replace the structure that this height of boss 28,34,35,36 staggers, they can be designed to, and same arm is thick to be reduced, and then their corresponding oppositely wall thickness reduces in segmentation 26 parts is abutted in.Fix in order to constitute segmentation 25,26 shapes sealedly, have two to be segmentation 25, the 26 clamping holding device 37,38 of zigzag structure part separately on the closure member 16 in form, their shapes are intermeshed sealedly.
Fig. 6 amplifies the overlap of representing between the segmentation 25,26 by the line 6-6 in the Figure 4 and 5.Press Fig. 6, boss 36 wall thickness of segmentation 25 are reduced and are overlapped on the corresponding part that reduces of segmentation 26 wall thickness, so overlap has and the consistent wall thickness of closure member 16 remaining parts.
Fig. 7 part has been represented the clamping safty device 37 by Figure 4 and 5 enlargedly.Wherein, there is zigzag structure the end of segmentation 25,26, and they are designed to mirror-symmetrical arrangement obliquely between segmentation 25,26.
Closure member 16 in Fig. 8 is provided with a fixed element 39 that stretches out towards clutch housing 14 directions, and its shape is inserted in the breach 40 of clutch housing 14 sealedly.For this reason, fixed element 39 is designed to divide at least two-part, in the mounting point this structure division that has two clamping elements at least by means of sealed ground of the claw shape kayser that is formed in the termination on clutch housing 14.Preferably a fixed element 39 is established in each segmentation 25,26 of closure member 16.By another kind of alternative plan regulation, the segmentation of closure member 16 is shaped on a boss 41, sets a fixed element 39 in the blind hole shape breach of its kayser on clutch housing 14 and for another segmentation.
Symbol table 1 separating mechanism 22 abutment wall 2 driving shafts 23 inclined-planes 3 add 7 guide pin bushings, 28 boss, 8 pressure chambers, 29 breach, 9 annular lip, 30 annular protuberantia 10 piston sealing devices 31 annular protuberantia 11 clutch bearings 32 ribs 12 pressure tap 33 transition regions, 13 holes, pressure shell 24 inclined-planes 4 transmission case, 25 segmentations 5 hole walls 26 segmentations, 6 pistons, 27 lines of demarcation, 34 boss, 14 bell housings, 35 boss, 15 elbows, 36 boss, 16 closure members, 37 clamping holding devices, 17 cannelures, 38 clamping holding devices, 18 boss, 39 retaining elements, 19 breach, 40 breach, 20 external edge, 41 boss, 21 abutment wall