WO2003020492A1 - Articulation elastique a manchon cylindrique - Google Patents
Articulation elastique a manchon cylindrique Download PDFInfo
- Publication number
- WO2003020492A1 WO2003020492A1 PCT/FR2002/002994 FR0202994W WO03020492A1 WO 2003020492 A1 WO2003020492 A1 WO 2003020492A1 FR 0202994 W FR0202994 W FR 0202994W WO 03020492 A1 WO03020492 A1 WO 03020492A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- core
- helical
- sleeve
- joint
- frames
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/0053—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor combined with a final operation, e.g. shaping
- B29C45/006—Joining parts moulded in separate cavities
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/26—Moulds
- B29C45/2618—Moulds having screw-threaded mould walls
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/40—Removing or ejecting moulded articles
- B29C45/44—Removing or ejecting moulded articles for undercut articles
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F1/00—Springs
- F16F1/36—Springs made of rubber or other material having high internal friction, e.g. thermoplastic elastomers
- F16F1/38—Springs made of rubber or other material having high internal friction, e.g. thermoplastic elastomers with a sleeve of elastic material between a rigid outer sleeve and a rigid inner sleeve or pin, i.e. bushing-type
- F16F1/387—Springs made of rubber or other material having high internal friction, e.g. thermoplastic elastomers with a sleeve of elastic material between a rigid outer sleeve and a rigid inner sleeve or pin, i.e. bushing-type comprising means for modifying the rigidity in particular directions
- F16F1/3873—Springs made of rubber or other material having high internal friction, e.g. thermoplastic elastomers with a sleeve of elastic material between a rigid outer sleeve and a rigid inner sleeve or pin, i.e. bushing-type comprising means for modifying the rigidity in particular directions having holes or openings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F13/00—Units comprising springs of the non-fluid type as well as vibration-dampers, shock-absorbers, or fluid springs
- F16F13/04—Units comprising springs of the non-fluid type as well as vibration-dampers, shock-absorbers, or fluid springs comprising both a plastics spring and a damper, e.g. a friction damper
- F16F13/06—Units comprising springs of the non-fluid type as well as vibration-dampers, shock-absorbers, or fluid springs comprising both a plastics spring and a damper, e.g. a friction damper the damper being a fluid damper, e.g. the plastics spring not forming a part of the wall of the fluid chamber of the damper
- F16F13/08—Units comprising springs of the non-fluid type as well as vibration-dampers, shock-absorbers, or fluid springs comprising both a plastics spring and a damper, e.g. a friction damper the damper being a fluid damper, e.g. the plastics spring not forming a part of the wall of the fluid chamber of the damper the plastics spring forming at least a part of the wall of the fluid chamber of the damper
- F16F13/14—Units of the bushing type, i.e. loaded predominantly radially
- F16F13/1463—Units of the bushing type, i.e. loaded predominantly radially characterised by features of passages between working chambers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/774—Springs
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/774—Springs
- B29L2031/7742—Springs helical springs
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F2226/00—Manufacturing; Treatments
Definitions
- the present invention relates to an elastic joint essentially comprising a flexible cylindrical sleeve, preferably held between two sockets forming an armature.
- the invention relates more particularly, but not exclusively, to an element forming a suspension articulation and a torsion spring for a vehicle, one of the parts possibly being constituted by a tubular cross-member and the other part by a suspension arm.
- the elastic joint of the invention is preferably intended to work in torsion and in compression compression. It is preferably intended to be installed between two parts capable of limited relative rotation about an axis of rotation and of limited relative movement in at least one radial direction.
- the articulation described in this document comprises several modules each provided with an outer frame and an inner frame and between which is mounted a connecting sleeve made of elastomeric material secured, without possible sliding, to these outer and inner frames.
- the elastomer sleeve is provided with circular cells, or in arcs of a circle, allowing a reduction of this stiffness.
- the cells result from the association side by side of articulation modules, the end edges of each module being hollowed out according to a profile of a half-cell.
- the invention provides for filling the cavities by closing them, for example by combining complementary elastic articulation elements in a liquid tank, so that the liquid fills the cavities.
- the connection between two elements can be carried out in different ways, by polymerization, by vulcanization, possibly only the reinforcements of an articulation element are linked together, the internal elastic sleeves between these reinforcements being only pressed against one another.
- the helical cavities do not open out on either side of the sleeve: the corkscrew is shorter than the length of the sleeve. As a result, the cavities are only open on one side.
- the invention therefore relates to an elastic joint of the type comprising a flexible circular cylindrical sleeve to be inserted between two frames, characterized in that the sleeve comprises a helical cavity.
- the invention also relates to a method of manufacturing an elastic joint in which
- a sleeve is formed by injecting a plastic material between the two frames, characterized in that - a helical core is placed between the two frames before injection, and
- the plastic material is in particular made of elastomer or rubber.
- FIG. 1 a sectional representation of part of an elastic joint according to the invention
- FIG. 2 a perspective representation of a core used to make the elastic joint of the invention
- FIG. 3 and 4 a representation respectively in perspective and in section of a mold used to make the elastic joint of Figure 1 from the core of Figure 2;
- FIG. 1 shows an elastic joint according to the invention.
- This elastic articulation 1 essentially comprises a cylindrical sleeve 2.
- the sleeve 2 is preferably circular cylindrical, although it could be envisaged that the sleeve itself is not necessarily circular but of internal and external shape suitable for a particular use.
- the sleeve 2 is made of a flexible material, in particular elastomer or rubber.
- the sleeve 2 is intended to be inserted between two inner and outer sockets respectively 3 and 4 forming the frame of the joint 1.
- the interior and exterior reinforcements can be continuous and in particular do not require over-reinforcements 5 and 6, respectively interior and exterior against which they engage, to associate the elements with one another.
- the reinforcements 3 and / or 5 on the one hand, and 4 and / or 6 on the other hand can be in one piece.
- FIG. 1 it has also been shown that the overall sleeve results from the association of two half-sleeves mounted head to tail, with their internal and external frames engaged against the over-frames 5 and 6.
- the two half-sleeves can be devoid of their internal and external armatures and be mounted as such, head to tail, in the over-armatures 5 and 6.
- the sleeve 2 comprises at least one cavity such as 7. While in the prior art the cavity 7 was circular, in the invention the cavity 7 has a helical shape with a progression pitch measured along an axis 8. L the axis 8 is preferably coaxial with the reinforcements 3 and 4 if these are also circular cylindrical.
- the helical cavity 7 thus belongs to a first helix 9.
- the profile of the cavity 7, measured along a plane passing through the axis 8 generally has the shape of an isosceles triangle of which the top is oriented towards the inner frame 3, the base being placed on the side of the outer frame 4.
- the profile shows that at the connection of the faces of the cavity 7 the angles of the triangle are rounded, in particular to simplify demolding.
- the dimensions of the profile of the cavity 7 are such that a small amount of material resides between the frame 4 and the interior of the cavity 7. It is the same at the location of this base and this top.
- the propeller 9 is nested with a number N -1 of other propellers, offset from that -ci of a difference equal to the pitch of the propeller 9 divided by the. number N of propellers nested with it.
- N the number of propellers nested with it.
- four propellers 9 to 12 are produced, each being offset from those adjoining them by a quarter of a pitch.
- the number N of propellers depends on the one hand on the diameter of the sleeve and on the thickness and length of the latter.
- FIG. 1 shows figuratively by a curve 13 a view, in planes deeper than that of the section of FIG. 1, of the shape of the trace of an angle of the base of the cavity 7.
- a dashed line 14 shows, for the other angle of this base, in planes closer to the observer, the path of the propeller from this other angle.
- FIG. 2 shows a core 15 which can be used to make the helical cavities of FIG. 1.
- the core 15 here comprises four helical helices respectively 16 to 19 corresponding to the helical cavities 9 to 12.
- the core 15 is provided with a base 20 to which one of the ends of all the propellers 16 to 19 are fixed. The other ends are free.
- the base 20 and the propellers 16 to 19 are made of steel, the fixing being carried out by welding.
- the core 15 can be made of aluminum alloy. Preferably, it will undergo a surface treatment so as not to adhere to the rubber, to the elastomer, after polymerization. This surface treatment is for example formed by the establishment of a layer of polytetrafluoroethylene on the branches formed by the propellers.
- Figures 3 and 4 show a mold usable for implementing a method of manufacturing an elastic joint according to the invention.
- This mold presented arbitrarily vertically has a lower imprint 21, a circular external imprint 22 and a circular internal imprint 23.
- the shape of the internal and external imprints depends on the desired shape for the sleeve.
- the internal impression 23 can slide inside the external impression 22 (passing through the lower impression 21) to be withdrawn downwards.
- the external cavity 22 also receives on its top an injection cover 24 provided with injection orifices 25 to 28.
- the openings 25 to 28 are in sufficient number to ensure good penetration of the elastomer injected into the mold. They are preferably in a number equal to the number of propellers carried by the core 15 previously installed inside the cavity 22.
- the molding operation occurs as follows.
- the external cavity 22 is placed on the lower cavity 21 and the cavity 23 is pressed inside the cavity 22.
- the core 15 is then placed in the intermediate position between these two cavities, the base 20 of which is rendered solidary from the top of the internal imprint 23 by means of a nut 29 which is fixed on a threaded end piece integral with the internal imprint 23.
- the frames 3 and 4 are put in place or not beforehand. place in the mold of Figures 3 and 4, respectively one against the internal imprint 23 the other against the external imprint 22.
- these two imprints and these sockets can be provided with undercuts and undercuts allowing demolding easy.
- each imprint has separable parts.
- the injection cover 24 is placed above the assembly, making the injection orifices 25 to 28 correspond to the orifices present in the base 20 (and not shown in the figure 3) allowing the injected material to easily travel in spaces such as that left between the helices 18 and 19 of the core 15.
- a seal 30 to be interposed between the cover 24 and the external cavity 22 allows injection to be carried out in good conditions.
- the core 15 is extracted from the sleeve, or from the articulation with armature if the latter was formed from the start, by gripping it by the base 20 and unscrewing it in a direction corresponding to the direction of the helix.
- This number of turns reduced to one is a compromise between the most homogeneous distribution of the cavities possible and the easiest demoulding possible. This reduced number of turns also conditions the number N. Demolding is facilitated by the surface treatment of the propellers 15 to 19, and by their draft. From the first unscrewing movements, the ambient air enters between the propellers 16 and the walls of the hollow propellers 9 to make demolding even easier.
- the height 31 of the core 15 is less than the height 32 of the external cavity 22 and therefore of the sleeve or the resulting joint. Therefore the helical cavities formed by the propellers 9 to 12 do not open out at a base of the sleeve close to the lower cavity 21. In this way it provides a natural closure of the cavities formed by the propellers, at one of their ends opposite to that by which the core 15 is removed. According to the invention, it then suffices to take two cores of this type, with cavities closed on one side, to immerse them in a liquid and to ensure that this liquid penetrates into the cavities.
- the helical shape is particularly suitable for a flow of liquid along the walls of the propeller and therefore for the evacuation of air bubbles.
- FIG. 5 makes it possible to understand how the process for producing an elastic articulation of the invention is automated for manufacturing in large quantities.
- the mold has a lower imprint 21 made integral with a vertical and central screw 33.
- the core rests by means of the base 20 on this lower imprint 21.
- the core 15 is made integral with a central nut 34 engaged on the screw 33. If, as in the example shown in FIG. 5, joints already provided with armatures 3 and 4, the internal imprints 23 and external 22 only serve to maintain these armatures.
- the internal imprint 23 can then be formed by a central projection of the cover 24.
- the nut 34 is subject to the screw 33 to impose a rotation on the core 15 during the axial movement of the latter relative to the mold.
- the nut 34 is free to rotate relative to the internal reinforcement 3, that is to say that its surface more or less cylindrical does not constitute an internal imprint 23. If, moreover, it was desired to mold sleeves without internal reinforcement 3, it would suffice for example to extend a central projection of the cover 24 up to the base 20 and to use it as internal imprint 23.
- the installation of the mold then firstly comprises the engagement of the core 15, integral with the nut 34 by its base 20, on the screw 33 of the lower imprint 21. Then any reinforcements are put in place interior 3 and exterior 4. Then the external impression 22 is put in place.
- the cover 24 also forming the internal impression 23 is placed on the whole, and the injection is produced by the orifices 25 to 28.
- the injection is produced by a side of the core opposite the injection side of Figures 3 and 4.
- the cover 24 is also spaced from the free ends of the core 15 to form the natural fillings of the propellers. In this case, the number of injection ports need not be equal to the number of propellers.
- the mold is removed.
- the cover 24 is then removed firstly.
- the external impression 22 is grasped by an extractor capable of moving it away from the impression 21 in a direction carried by the direction of the axis 8.
- the external impression 22 comprises in this effect in the lower part of an edge 35 bearing under the external frame 4.
- the frame 4 then rises and carries with it the sleeve 2 and the internal frame 3.
- This elevation of the sleeve 2 itself drives the core 15 and therefore the nut 34 upwards, in the same direction as the movement of the extractor.
- the nut 34 is then forced to rotate around the screw 33.
- the screw 33 has grooves 36 allowing, by their orientation, the sleeve 2 to be unscrewed from the core 15.
- each of the pitches is chosen as a function of constraints which are specific to it, linked to the product produced for the core 15, and to the release forces for the screw 33.
- the translation imposed by the external cavity 22 must be at least the sum of the height of the core 15 and the distance traveled by the nut 34 on the screw 33. The latter is equal to the pitch of the screw 33 multiplied by the number of helix turns of the core 15. A at the end of the movement, the core 15 is released in the high position. It could descend by gravity alone to rest again by its base 20 on the lower footprint 21.
- a molding tool according to the invention comprises in parallel a large number of molds such as that shown in FIG. 5.
- the set of covers 24 forms a single plate, as does the set of external impressions 22 and that all of the lower imprints 21.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP02774897A EP1425148A1 (fr) | 2001-09-06 | 2002-09-02 | Articulation elastique a manchon cylindrique |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0111560A FR2829210A1 (fr) | 2001-09-06 | 2001-09-06 | Articulation elastique a manchon cylindrique |
FR0111560 | 2001-09-06 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2003020492A1 true WO2003020492A1 (fr) | 2003-03-13 |
Family
ID=8867044
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FR2002/002994 WO2003020492A1 (fr) | 2001-09-06 | 2002-09-02 | Articulation elastique a manchon cylindrique |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP1425148A1 (fr) |
FR (1) | FR2829210A1 (fr) |
WO (1) | WO2003020492A1 (fr) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN115284413A (zh) * | 2022-08-12 | 2022-11-04 | 先导薄膜材料有限公司 | 一种旋转靶材成型模具及旋转靶材的成型方法 |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP6585468B2 (ja) * | 2015-10-30 | 2019-10-02 | 住友理工株式会社 | 鉄道車両用ゴムブッシュ |
EP4215776A1 (fr) * | 2022-01-21 | 2023-07-26 | Vibracoustic SE | Douille pour un support anti-vibration, support anti-vibration et procédés de fabrication d'un support anti-vibration |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1261816A (en) * | 1968-09-28 | 1972-01-26 | Alfons Wilhelm Thiel | Double-walled container |
GB2008714A (en) * | 1977-10-27 | 1979-06-06 | Volkswagenwerk Ag | Asymmetric Resilient Bushing |
JPH026208A (ja) * | 1988-06-22 | 1990-01-10 | Daihatsu Motor Co Ltd | 筒形サスペンションブッシュ |
US4964623A (en) * | 1987-12-07 | 1990-10-23 | Lord Corporation | Fluid filled resilient bushing |
JP2000246771A (ja) * | 1999-03-02 | 2000-09-12 | Sumitomo Bakelite Co Ltd | スクリュー形状を有する樹脂成形品の成形方法 |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE60006913T2 (de) | 1999-04-16 | 2004-10-28 | Compagnie Générale des Etablissements Michelin-Michelin & Cie., Clermont-Ferrand | Element das als aufhängungsgelenk und torsionsfeder ausgestaltet ist, insbesondere für fahrzeuge |
-
2001
- 2001-09-06 FR FR0111560A patent/FR2829210A1/fr active Pending
-
2002
- 2002-09-02 WO PCT/FR2002/002994 patent/WO2003020492A1/fr not_active Application Discontinuation
- 2002-09-02 EP EP02774897A patent/EP1425148A1/fr not_active Withdrawn
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1261816A (en) * | 1968-09-28 | 1972-01-26 | Alfons Wilhelm Thiel | Double-walled container |
GB2008714A (en) * | 1977-10-27 | 1979-06-06 | Volkswagenwerk Ag | Asymmetric Resilient Bushing |
US4964623A (en) * | 1987-12-07 | 1990-10-23 | Lord Corporation | Fluid filled resilient bushing |
JPH026208A (ja) * | 1988-06-22 | 1990-01-10 | Daihatsu Motor Co Ltd | 筒形サスペンションブッシュ |
JP2000246771A (ja) * | 1999-03-02 | 2000-09-12 | Sumitomo Bakelite Co Ltd | スクリュー形状を有する樹脂成形品の成形方法 |
Non-Patent Citations (2)
Title |
---|
PATENT ABSTRACTS OF JAPAN vol. 014, no. 140 (M - 0950) 16 March 1990 (1990-03-16) * |
PATENT ABSTRACTS OF JAPAN vol. 2000, no. 12 3 January 2001 (2001-01-03) * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN115284413A (zh) * | 2022-08-12 | 2022-11-04 | 先导薄膜材料有限公司 | 一种旋转靶材成型模具及旋转靶材的成型方法 |
Also Published As
Publication number | Publication date |
---|---|
EP1425148A1 (fr) | 2004-06-09 |
FR2829210A1 (fr) | 2003-03-07 |
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