JP2015516549A - Transmission pulley for automotive equipment and methods for manufacturing and disassembling such pulleys - Google Patents

Abstract

The present invention relates to a transmission pulley (1) for automotive equipment, in particular an air conditioning compressor. This pulley (1) utilizes a hub (10), which is centered on the central axis (X1) and can be fixed to a shaft which is a part of an automobile equipment, a radial rim (22) and a belt. A gear (20) including an outer track (24) for driving the rotation of the gear, an annular insert (40), and a coupling means (60) for coupling the annular insert (40) to the gear (20); , Including. In the pulley, the connecting means (60) is dispersed (27, 28) in the gears (20) and (43, 44) and the annular insert (40), the annular insert (40) being rotatable about the central axis (X1). Between a connected configuration assembled to the gear (20) and freely movable relative to the gear along the axis (X1) and an unconnected configuration in which the annular insert is separable from the gear. The connecting means (60) is characterized by allowing an axial clearance parallel to the axis (X1) between the gear and the annular insert. The invention further relates to a method for producing such a pulley 1 and a method for disassembling it.

Description

  The technical field of the invention is transmission systems using pulleys and belts, and more particularly pulleys for damping torsional vibrations for automotive equipment.

  In known embodiments, the pulley and belt system is disposed between a drive shaft, such as a crankshaft, and one or more non-rotating drive members. In particular, the driven member may be an automotive equipment such as an alternator, a cooling pump, or an air conditioning compressor. Shocks and vibrations generated on the drive shaft are transmitted to the pulley and belt system and the equipment driven by the pulley, which can accelerate wear and cause failure. In addition, the equipment can be degraded by excessive acclimatization during variations in the rotational speed of the system due to the reduction ratio provided in the design of the equipment appearance. As an example, the alternator speed change is about three times the crankshaft speed change.

  Patent Document 1 discloses a transmission pulley suitable for fitting into a crankshaft of an engine or machine having a reciprocating piston. The pulley includes a hub, an outer gear that receives the belt, and a steady ring that is fastened between the hub and the gear. This pulley satisfies the torsional vibration damping and guarantees the filtering effect of acyclic vibrations at low rotational speeds. However, this pulley requires many man-hours of assembly and disassembly work, which can accelerate wear.

  Patent document 2 discloses different embodiments of a transmission pulley for automobile equipment. In particular, the document discloses, as state of the art, a pulley having a hub, a gear, an annular insert, an elastically deformable member, and a screw for connecting the annular insert to the gear. These screws are an additional part, complicating the assembly and disassembly of the pulley components. The transition between connected and disconnected configurations requires the use of tools for screw tightening and loosening. In the coupled configuration, the screw is tightened to press the annular insert against the gear. The annular insert is then secured to rotate with the gear about the central axis, but does not translate freely along the central axis. If the screws are not tightened, they cause noise pollution and deterioration of the pulley components.

  Patent Document 3 discloses another embodiment of a transmission pulley for automobile equipment. The means for connecting the annular insert and the gear comprises an additional part leaf spring, which makes the assembly and disassembly of the pulley components more complicated. In the coupled configuration, due to the pressure applied to the annular insert by the leaf spring, the annular insert is fixed to rotate with the gear about the central axis, but does not translate freely along the central axis. .

European Patent Application No. 0 790 440 US Patent Application Publication No. 2006/0194663 German Patent Application Publication No. 100 311 367

  The present invention aims to propose an improved pulley.

  To that end, the present invention is a pulley for automotive equipment, in particular an air conditioning compressor, which pulley is fixed to a shaft that is centered on the central axis and that is part of the automotive equipment. A gear having a possible hub, a rim extending radially with respect to the central axis, and an outer track, the outer track using a belt to drive and rotate the gear, and a hub to rotate And a fixed annular insert and means for connecting the annular insert to the gear. The pulley has a connecting means for connecting the annular insert to the gear, one of which is dispersed in the gear is dispersed in the annular insert, and can be adapted between a connected form and an unconnected form. In the coupled form, the annular insert is assembled to the gear so as to be rotatable about the central axis and is freely movable with respect to the gear along the central axis, and the coupling means is provided between the gear and the annular insert. An axial play parallel to the central axis is allowed, and in an unconnected form, the annular insert can be separated from the gear.

  Thus, the present invention facilitates assembly and disassembly of pulley components by means of connecting means, one dispersed in the gear and the other dispersed in the annular insert. Due to its dispersion, the number of elements handled during pulley assembly is reduced compared to connecting means with screws, metal blades or other additional parts. In particular, due to the presence of axial play, the coupling means confirm that the pulleys can be assembled with a wide range of mechanical tolerances and simplify the assembly station for assembling the annular insert to the gear. Making it possible. The pulley operates optimally with a variety of components that are driven to rotate about the central axis in a coupled configuration. The transition from the coupled configuration to the uncoupled configuration corresponding to the disassembly of at least a part of the pulley can be done manually, simply, quickly and in a reliable manner and vice versa. In the transition from a non-connected form to a connected form, no screw connection is required and no special tools are required. By means of the connecting means according to the invention, the pulley is suitable for withstanding many assembly and disassembly operations over its lifetime, in particular an elastically deformable member that can be inserted between the annular insert and the hub. It does not deteriorate and does not degrade the overall performance in terms of pulley operation and torque transmission. The life of this pulley is therefore improved.

  The present invention is particularly well suited for driving air-conditioning compressors, particularly variable compressors that are driven by pulleys while changing the compression ratio as required.

Other advantageous features of the invention are contemplated in the following features alone or in combination.
The pulley also comprises an elastically deformable member arranged around the central axis between the annular insert and the outer surface of the hub.
-In the coupled configuration, the coupling means eliminates any rotational play around the central axis between the gear and the annular insert.
The connecting means comprises a tab that is flexible in the radial direction relative to the central axis and axially relative to the central axis during assembly and during use of the pulley.
The connecting means can be adapted between a connected form and an unconnected form without screwing;
The connecting means can be adapted from a connected configuration to an unconnected configuration without using special tools, by pulling the annular insert generally in the axial direction opposite to the gear;
-The connecting means comprises at least one part, and in the connected form, when the pulley exceeds a predetermined torque threshold value and becomes overtorque, that part can be plastically deformed, ruptured or meltable The plastic deformation, breakage, or fusing of the portion shifts the gear and the annular insert to a form in which they are not connected.
The connecting means comprises at least one member fixed to the annular insert or gear and at least one opening arranged in the gear or annular insert, not connected by mechanical cooperation, in particular by clipping It is possible to adapt from form to connected form.
The connecting means comprises at least one member extending radially and / or axially with respect to the central axis from a part of the annular insert, and essentially radially or essentially axially with respect to the central axis At least one opening disposed in the gear, preferably a plurality of openings distributed around the central axis, or each opening belonging to the annular insert in a connected configuration, or And at least one opening capable of at least partially receiving a member.
The connecting means comprise elastically deformable staples, axial slugs and / or radial lugs;
The connecting means comprises an opening which is capable of receiving a member which is distributed in the gear around the central axis and which is fixed to the annular insert, the other member being arranged in the other opening in a connected form; An angular offset is provided between the at least one member and an opening for receiving the member, the angular offset in a coupled configuration about a central axis between the gear and the annular insert. Eliminating any rotation play.

The present invention also relates to a method for manufacturing the aforementioned pulley. This manufacturing method is characterized by including at least the following steps.
a) Manufacturing the hub.
b) producing a gear provided with a first part of a connecting means for connecting to the rim, the outer track and the annular insert;
c) producing an annular insert including a second part of the connecting means for connecting the gear;
d) securing the annular insert to the hub for rotation about the central axis;
e) fixing the annular insert to the gear by adjusting the connecting means to form a connected form.
Steps a), b) and c) are performed before step e) which is performed before step f).

If the pulley comprises an elastically deformable member, in step a) the hub includes an outer surface suitable for receiving the elastically deformable member, and the manufacturing method manufactures the elastically deformable member. Step d) comprising the steps of: e) including steps e) including the following sub-steps e1) and e2), wherein steps e1) and e2)
e1) placing an elastically deformable member on the outer surface of the hub, and e2) placing an elastically deformable member on the annular insert.

  The present invention also relates to a method for disassembling a pulley manufactured using the above-described manufacturing method. In this disassembling method, the annular insert is separated from the gear in the connecting means, and the annular insert is pulled in the axial direction opposite to the gear as a whole, thereby moving from the connected form to the non-connected form. Characterized in that it includes a step g).

  The invention will be better understood by reading the following description, which is provided merely as a non-limiting example and is made with reference to the accompanying drawings.

It is the perspective view which showed the pulley by this invention. It is the figure which showed the side surface along the arrow II of FIG. It is the figure which showed the rear surface along the arrow III of FIG. It is the figure which showed the front surface along the arrow IV of FIG. It is the figure which showed the cross section along line VV of FIG. It is the figure which expanded detail VI of FIG. It is the figure which showed the cross section along line VI-VI of FIG. FIG. 6 is a partial cross-sectional view similar to FIG. 5 of a pulley according to a second embodiment of the present invention. It is the elements on larger scale similar to FIG. 4 which showed the pulley of FIG. It is the figure which showed the cross section along line XX of FIG. FIG. 5 is a small scale view of a pulley according to a third embodiment of the present invention from a perspective similar to FIG. It is the figure which showed the cross section along line XII-XII of FIG. It is the figure which showed the pulley by 4th Embodiment of this invention of the viewpoint similar to FIG. FIG. 14 is a diagram showing the pulley shown in FIG. 13 from a viewpoint similar to FIG. 11. It is the figure which showed the cross section along line XV-XV of FIG. FIG. 14 is a diagram showing a pulley according to a fifth embodiment of the present invention from a viewpoint similar to FIGS. 8 and 13. FIG. 17 shows the pulley of FIG. 16 from a perspective similar to FIGS. 11 and 14. It is the figure which showed the cross section along line XVIII-XVIII of FIG. It is the figure which showed the 6th Embodiment of this invention of the viewpoint similar to FIG.

  1 to 7 show a transmission pulley 1 according to the present invention.

  The pulley 1 is suitable for being driven by a belt C and a drive shaft A. Belt C and shaft A are only partially shown in FIG. 2 for simplicity purposes. On one side, the shaft A belongs to an air conditioning compressor not shown. The belt C is driven by a first pulley that is fitted in a drive shaft, such as a crankshaft, not shown in the figure. Pulley 1 and belt C form a system for transmitting torque and rotational motion M1 to shaft A of the air conditioning compressor.

  In addition to or separately from the air conditioning compressor, the pulley 1 is suitable for driving one or more automotive equipment such as an alternator or a cooling pump.

  The pulley 1 includes a hub 10, a gear 20, an anti-rest ring 30, and an annular insert 40, which are fixed to rotate M1 around a central axis X1. The pulley 1 also comprises a rotary bearing 50 provided in the inner part 21 of the gear 20 and centered on the axis X1. The pulley 1 also comprises means 60 for connecting the insert 40 to the gear 20, which means can be adapted between a connected form and an unconnected form, as will be shown later.

  Hereinafter, the inner side is defined as being directed in the radial direction toward the central axis X1, and the outer side is defined as being directed in the radial direction opposite to the central axis X1. Thus, for a given component of the pulley 1, the interior is closer to the axis X1 than the exterior. The front side is defined as the side on which the hub 10, the ring 30 and the insert 40 are disposed, and the rear side is defined as the side on which the rotary bearing 50 and the compressor shaft A are disposed.

  Hub 10 is preferably made of metal and includes an interior 11, a diameter 12, and an exterior 13. The diameter portion 12 extends perpendicularly to the axis X <b> 1 between the inside 11 and the outside 13. As described below, the exterior 13 is annular in shape and includes an outer cylindrical surface 14 that is provided to receive a steady ring 30. The interior 11 is provided to be fixed to the shaft A. As shown in FIG. 5, the interior 11 includes a bore 11a, a front shoulder 11b, a spline 11c, and a rear shoulder 11d. The hub 10 is a component that rotates about the axis X1 except for the spline 11c.

  During the assembly of the hub 10 to the shaft A, the shaft A cooperates with the spline 11c and then abuts against the shoulder 11d. The washer D is preferably disposed in the bore 11a at the end of the shaft A and abuts against the shoulder 11b. The nut E is screwed into the end of the shaft A until it abuts against the washer D. Next, the shaft A is pressed against the shoulder 11d at its end by tightening the nut E.

  The gear 20 is preferably made of metal and includes an interior 21, a diameter ring 22, and an exterior 23. The interior 21 is provided for receiving the housing, while the exterior 23 includes a peripheral track 24 provided for receiving the belt C. For that purpose, the track 24 is provided with an axial series V-shaped streak or radial slot 25, which is suitable for cooperating with the belt C or any other infinite driven or driving element. ing. In that case, such a transmission element includes a V-shaped slot complementary to the slot 25. The diameter of the track 24 can be measured outside the two adjusted beads B shown in FIG. 5 only, each bead engaging in the slot 25 of the track 24, and ISO 9981 It is compliant. The track 24 is preferably machined or cold worked based on the method used to manufacture the gear 20. The two edges 26 project from the outer side 23 individually on the front side and the rear side, and edge the track 24, which is advantageous for maintaining the belt C on the track 24. Alternatively, the exterior 23 may have a single edge or may be edgeless.

  The gear 20 also comprises a connecting means 60, that is, a portion of an opening 27 and a tab 28 formed in the ring 22. More specifically, the rib 22 includes three sets of openings 27 that are coaxially penetrated from front to back, and each set of openings 27 fits a tab 28, and the tab 28 has an inner edge and an outer edge of the ring 22. It extends radially with respect to the axis X1 between the edges. The tabs 28 are distributed on the rim 22 at intervals of 120 ° around the axis X1. These elements 27 and 28 belong to the connecting means 60 formed in the gear 20 and are suitable for cooperating with other parts of the connecting means 60 formed in the insert 40 as described below. The gear 20 is a rotating part centered on the axis X 1 except for the opening 27 and the tab 28 formed in the rim 22.

  As shown in FIG. 5, the rotary bearing 50 includes an outer ring 51 fixed to the gear 20, an inner ring 52, and a rotating element 53 disposed between the rings 51 and 52. The outer ring 51 is assembled in the inner bore of the interior 21 of the gear 20. Although not shown, the inner ring 52 is assembled to a compressor housing that surrounds the compressor shaft A. Thus, the gear 20 and thereby the pulley 1 is rotatably mounted in the compressor housing, while driving the compressor shaft A.

  The steady ring 30 is an elastomer ring or is formed of any other material that can be elastically deformed under the condition of use of the pulley 1. The ring 30 is preferably formed by injection molding or alternatively using any method suitable for this device. The ring 30 includes an outer surface 31 secured to the insert 40 and an inner surface 32 secured to the outer surface 14 of the hub 10. These rigid connections can be made by press fitting, gluing, sticking, welding, welding, and / or any other method suitable for this device. For example, the ring 30 may be fitted to the exterior 13 of the hub 10 and then covered and clamped by the insert 40. Accordingly, the ring 30 is fixed to the hub 10 and the insert 40 during the rotational movement M1 around the axis X1 of the pulley 1. The hub 10 is fixed to the shaft A, while the insert 40 is fixed to the gear 20 in a connected form of the connecting means 60 as described later. The ring 30 has a stiffness of about 5-10 Nm and ensures the rotation of the shaft A while limiting the speed change.

  Although the pulley 1 preferably includes the steady ring 30, the pulley 1 may not include the steady ring 30 instead. In that case, the annular insert 40 uses a non-rotating flat section coupled with the hub 10 and suitable means such as a plastic washer, a spline formed in the hub, or an axial bearing fixed by crimping so that it rotates M1. Fixed.

  The annular insert 40 is preferably made of metal and includes an inner cylindrical surface 41, a rear radial surface 42, three tabs 43 and three staples 44. The surface 41 is fixed to the surface 31 of the ring 30 as described above. Three tabs 43 extend from the face 42 of the insert 40, first in the rear direction of the shaft and then in the outer direction of the shaft. In other words, the three tabs 43 are curved toward the back and up of the pulley 1. These tabs 43 are thicker in the normal direction with respect to the axis X1 than in the radial direction and axial direction with respect to the axis X1. Under these conditions, these tabs 43 are slightly flexible in the radial and axial directions during assembly and when the pulley 1 is used, but are flexible in the normal direction. I don't have it. Each tab 43 includes one of the staples 44 that are partially U-shaped at the opposite end of the face 42. More specifically, each staple 44 includes a base 45 fixed to the tab 43 and two elastically deformable tabs 46 extending rearward from the base 45. The tabs 43 and staples 44 are distributed at 120 ° intervals around the axis X1 in the insert 40. The insert 40 is a rotating part centered on the axis X 1 except for the tab 43 and the staple 44.

  The insert 40 thus comprises a part of the connecting means 60, i.e. tabs 43 and staples 44, which cooperate with other parts of the connecting means 60 formed in the gear 20, i.e. the openings 27 and the tabs 28. Suitable for The staple 44 may be inserted into the opening 27 together with the tab 46, and the tab 46 may grip the tab 28 by simply applying axial pressure from the front to the rear of the insert 40. The flexible tab 46 has a distance in the unconnected form that is smaller than the distance between the tabs 46 in the connected form of the connecting means 60 after deformation of the tab 28 to each side.

  During assembly or disassembly of the pulley 1 when transitioning from an uncoupled configuration to a coupled configuration, the flexible tab 46 is thereby locked into the opening 27 and mechanically cooperates with the tab 28. Work. The insert 40 is then secured to the gear 20 so as to rotate M1 about the axis X1, but is movable relative to the gear 20 along the axis X1. The connection between the insert 40 and the hub 10 avoids the accidental separation of the insert 40 from the gear 20 due to the freedom of translation. Belt C transmits rotational motion M1 to gear 20, which is then transmitted to insert 40, then to ring 30, then to hub 10, and then to compressor shaft A. In use, in the pulley 1 and the transmission system, the effects of vibration and accyclism are primarily damped by the steady ring 30. In this coupled form, on the one hand, means 60 allow axial play parallel to axis X1 between gear 20 and insert 40, and on the other hand any arbitrary around axis X1 between gear 20 and insert 40. Eliminates rotation play. Noise pollution when the pulley 1 is in use is reduced by eliminating axial play. In particular, due to the presence of play in the axial direction, the connecting means 60 according to the invention has the advantage that in use there is no generation of mechanical adaptation forces other than stress on the ring 30, the stress leakage being twisted during rotation. The pulley 1 is assembled with a wide mechanical tolerance and demonstrates that the assembly station for the assembly of the insert 40 and the gear 20 is simplified.

  During assembly of the pulley 1, which transitions from an uncoupled configuration to a coupled configuration, the nut E is loosened to separate the hub 10 from the shaft A. At that stage, a simple manual pulling of the insert 40 in the axial direction generally opposite to the gear 20, ie from the rear to the front of the pulley 1, is sufficiently connected without the need for any special tools. The insert 40 and the gear 20 in the means 60 can be separated. Due to the elastic deformation, the elastic tab 46 of the staple 44 separates and slides on the tab 28 until the tab 46 leaves the opening 27. In other words, the elements 27, 28 and 44 form a reversible mechanical coupling means 60 for the insert 40 and the gear 20. In an uncoupled configuration, assembly 10-30-40 with hub 10, ring 30, and insert 40 can be separated from assembly C-20-50 with belt C, gear 20, and rotating bearing 50. . If necessary, the belt C and gear 20 can also be removed from the compressor, while the rotating bearing 50 can be left in place on the housing. The pulley 1 is thus completely detached from the compressor and is simply and substantially reassembled thanks to the connecting means 60.

  The invention also relates to a method of manufacturing the pulley 1 and examples are described below.

  The method includes at least the following steps a), b), c), d), e), and f). Step a) consists of the manufacture of the hub 10. Step b) consists of the production of the first part of the means 60 for coupling with the rim 22, the outer track 24 and the annular insert 40, ie the gear 20 provided with openings 27 and their edges 28. Step c) consists of the manufacture of the second part of the means 60 for coupling with the gear 20, ie the annular insert 40 including the tabs 43 and staples 44. Step e) consists of securing the annular insert 40 to the hub 10 for rotation about the axis X1. Step f) consists of fixing the annular insert 40 to the gear 20 in the connected configuration by adapting the connecting means 60. Steps a), b) and c) are performed before step f) which is performed before step f). Steps a), b), and c) are performed simultaneously or sequentially in any order. The other intermediate steps or subsequent steps consist of cooperating the components of the pulley 1 with the shaft A, the rotary bearing 50 and the belt C.

  As a result, the pulley 1 comprises a steady ring 30 or any other elastically deformable member inserted between the annular insert 40 and the hub 10 and the method has certain differences with respect to the foregoing. . In step a), the hub 10 includes an outer surface 14 suitable for receiving the ring 30. The method also includes a step d) consisting of the production of the ring 30. Step e) includes the following sub-steps e1) and e2). Sub-step e1) consists of fixing the ring 30 to the outer face 14 of the hub 10. Sub-step e2) consists of fixing the ring 30 to the annular insert 40. Steps a), b), c), and d) can be performed simultaneously or sequentially in any order. Sub-steps e1) and e2) may be performed simultaneously or sequentially in any order based on the means used to provide a strong connection between the ring 30, the hub 10 and the insert 40.

  The invention also relates to a method for disassembly of the pulley 1 manufactured using the method described above. This disassembly method separates the annular insert 40 from the gear 20 at the coupling means 60 by pulling the annular insert 40 in an axial direction generally opposite the gear 20 from a coupled configuration to a disconnected configuration. Step g) consisting of:

  Other embodiments of the present invention are described below with respect to FIGS.

  In these embodiments, some of the components of the pulley 1 are the same as those of the first embodiment described above and are therefore given the same reference numerals for the purpose of simplification. The other components of the pulley 1 have a similar function, but have a different configuration compared to the first embodiment, with the same reference number increased by 100 for the second embodiment, The same reference number increased by 200 for the third embodiment, the same reference number increased by 300 for the fourth embodiment, and the same reference number increased by 400 for the fifth embodiment. , With the same reference numbers increased by 500 for the sixth embodiment. The method for manufacturing the pulley 1 described above is effective for all the embodiments.

  Figures 8 to 10 show a connecting means 160 belonging to a second embodiment of the pulley 1 according to the invention.

  In this second embodiment, the pulley 1 comprises an insert 140 in which the gear 120 and the means 160 are integrated. The gear 120 includes a radial rim 122, in which three axial through-openings 127 are arranged around the axis X1 at intervals of 120 °. Each opening 127 includes two lateral inner edges 128 that are substantially parallel to each other on each side of the radial plane including the central axis X1. The insert 140 includes a U-shaped staple 144 disposed at the end of each of the three curved tabs 43. The staple 144 includes a base 45 and a flexible tab 146 that can be inserted into the opening 127 and positioned relative to the edge 128. The flexible tab 146 has a distance in the unconnected form that is greater than the distance the tab has in the connected form of the connecting means 160 after deformation relative to the edge 128. Accordingly, the opening 127, the edge 128, the tab 43, and the staple 144 constitute a reversible mechanical coupling means 160 for coupling the insert 140 and the gear 20.

  11 and 12 show the connecting means 260 belonging to a third embodiment of the pulley 1 according to the invention.

  In this third embodiment, the gear 120 is similar to the gear of the second embodiment, and an opening 127 including an inner end edge 128 is provided. Pulley 1 includes an insert 240 provided with three curved tabs 243 and three staples 244. Each staple 244 has a C-shape and is slightly different from the shapes of staples 44 and 144, but their function is similar.

  The main difference with respect to the previous embodiment relates to the tab 243, which is thinner than the tab 43 in the normal direction, i.e. the direction perpendicular to the radial plane including the central axis X1. Thus, the tab 243 has a lower mechanical strength than the tab 43, but is still strong enough under normal operating conditions of the pulley 1 and will not fail. However, these tabs 243 form a portion that can be broken or melted in a connected form when the pulley 1 becomes overtorque exceeding a predetermined torque threshold. The breakage or fusing of the various parts 243 shifts to a state where the gear 120 and the annular insert 240 are not connected during use with the rotational movement M1 of the pulley 1. The components of the pulley 1 are not separated from the other elements, and the gear 120 driven by the belt C rotates freely on the rotating bearing 50, while the insert 240 connects to the ring 30, the hub 10 and the shaft A. It has been done. Transmission of torque and movement M1 from belt C to shaft A is no longer provided and the compressor stops.

  Accordingly, the opening 127, the edge 128, the tab 243, and the staple 244 constitute a reversible mechanical coupling means 260 for coupling the insert 240 and the gear 120, and the part 243 serves as an irreversible decoupling means. It is composed. After breaking or fusing part 243, insert 240 must be replaced, but the other components of pulley 1 remain intact.

  Alternatively, the means 260 or pulley 1 can include one or more parts that can be broken or blown in the event of over-torque, such as different on the tabs of the staples 244 or on the hub 10. Can be placed in position.

  FIGS. 13-15 show a connecting means 360 belonging to a fourth embodiment of the pulley 1 according to the invention.

  In this fourth embodiment, the pulley 1 comprises an insert 340 that integrates a gear 320 and means 360. The gear 320 includes a radial rim 322, in which three axial through openings 327 are arranged distributed about the axis X1 at intervals of 120 °. Each opening 327 includes three inner side edges 328 that oppose each other on each side of the radial plane including the central axis X1. Each opening 327 is slightly oval in the radial direction. In other words, the distance between the side edges 328 in the normal ray direction is smaller than the distance between the inner edge and the outer edge in the radial direction. The insert 340 includes a slug 344 disposed at the end of each of the three curved tabs 43. The slug 344 includes a base portion 345 and a cylindrical portion 346 centered on an axis parallel to the central axis X1.

  If the slug 344 is inserted axially into the opening 327, the means 360 will allow radial play due to the oval shape of the opening 327 and axial play due to the slightly flexible nature of the tab 43. doing. However, a close fit is preferably applied between the cylindrical portion 346 and the side edge 328, eliminating any play in the normal normal direction between the slug 344 and the opening 327. Apart from or in close proximity to the close fit, the means 360 can include an angular offset between at least one slug 344 and the opening 327 that receives the slug 344, which means that other slugs 344 In the connected form, it is a case where it is arranged in another opening 327. This angular offset includes a slight twist of the tab 43 to insert the slug 344 into the offset opening 327 but reinforces the rotational connection in the coupled configuration. Accordingly, the opening 327, the edge 328, the tab 43, and the slug 344 form a reversible mechanical coupling means 360 for coupling the insert 140 and the gear 120. These means 360 eliminate any rotational play between the gear 20 and the annular insert 40 about the central axis X1.

  Figures 16 to 18 show a connecting means 460 belonging to a fifth embodiment of the pulley 1 according to the invention.

  In this fifth embodiment, the pulley 1 comprises an insert 440 that integrates a gear 420 and means 460. Gear 420 includes a rim 422 without an opening and an outer portion 423 that includes three slots 427 distributed 120 ° around axis X1. More specifically, the slot 427 appears on the inner surface of the portion 423 and on the front side. Each slot 427 includes two lateral inner edges 428 that are substantially parallel to each other on each side of the radial plane including the central axis X1. The insert 440 includes three curved tabs 43 and lugs 444 extending radially with respect to the axis X1 at their respective ends. Each lug 444 can be inserted into one of the slots 427 while being fitted against the edge 428 to transition from a connected configuration to an unconnected configuration. Thus, the slot 427, the edge 428, the tab 43, and the lug 444 constitute a reversible mechanical coupling means 460 for coupling the insert 440 and the gear 430.

  FIG. 19 shows a connecting means 560 belonging to a sixth embodiment of the pulley 1 according to the invention.

  In this sixth embodiment, the pulley 1 comprises an insert 540 that integrates a gear 420 and means 560. The gear 420 is similar to the gear of the fifth embodiment, and is provided with three slots 427 distributed at 120 ° around the axis X1, and these slots appear on the inner surface of the portion 423 and on the front side.

  The main difference with respect to the previous embodiment is related to the insert 540 and the means 560. The insert 540 includes an annular portion 540a that defines the inner cylindrical surface 41, and a curved portion 543 that extends axially rearward and radially outward from the rear side 542 of the annular portion 540a. The portions 540a and 543 have an annular shape as a whole centered on the axis X1. The insert 540 also includes a member 546 that is initially secured to the portion 543. Member 546 includes a lug 544 connected to a radial annular disk 545 centered about axis X1. More specifically, the member 546 comprises three lugs 544 distributed about 120 ° around the axis X1 and extending radially from the outer periphery of the disk 545 toward the axis X1.

  Initially, the rear surface of the portion 543 and the front surface of the disk 545 are fixed at the connection 548, and the insert 540 forms a single part system at the portion 543 and the member 546. Portion 548 is schematically illustrated by a radial line between portion 543 and member 546 in FIG. As an example, portion 548 includes a weld joint, spot joint, or any other connection means suitable for the present application, which are described below. Portion 548 is at least partially around axis X1, preferably around the entire circumference of axis X1. When the connection portion 548 is assembled in the pulley 1, the disk 545 and the lug 544 belong to the insert 540. While being fitted to the edge 428, each lug 544 is inserted into one of the slots 427 and can transition from a connected configuration to an unconnected configuration, as in the fifth embodiment. It is.

  In practice, the connection 548 has sufficient mechanical strength under normal operating conditions of the pulley 1 to maintain the single part insert 540 with the integrated portion 543 and member 546 without failure. Yes. However, the connecting portion 548 forms a portion that can be broken or melted in a connected form when the pulley 1 becomes overtorque exceeding a predetermined torque threshold. The breakage or fusing of the connecting portion 548 causes the gear 420 and the annular insert 540 not to be connected during use with the rotational motion M1 of the pulley 1. The components of the pulley 1 are not separated from the other elements, the gear 420 driven by the belt C rotates freely on the rotating bearing 50, while the insert 540 connects to the ring 30, the hub 10 and the shaft A. It has been done. Transmission of torque and movement M1 from belt C to shaft A is no longer provided and the compressor stops. Advantageously, in the sixth embodiment, the member 546 is housed between the insert 540 and the gear 420, and the member 546 cannot be removed from the rotating assembly, and thus any outside the pulley 1 Does not cause trouble.

  Thus, the slot 427, the edge 428, the tab 543, the lug 544 and the disk 545 forming the member 546, and the connection 548 form a reversible mechanical coupling means 560 for coupling the insert 540 and the gear 420. The connection portion 548 forms a reversible connection release means. After rupturing or fusing of connection 548, insert 540 and member 546 can be re-fixed, preferably by welding, while the other components of pulley 1 remain intact.

  In contrast, although not shown, the means 60, 160, 260, 460, or 560 includes an angular offset corresponding to the angular offset of the means 360, and is optional around the central axis X1 between the gear and the insert. It is possible to eliminate the play of rotation.

  1 to 19, the pulley 1 is shown in a connected form.

  Regardless of the embodiment, the means 60, the gear 20, and the insert 40 can be adjusted between a connected configuration and a non-connected configuration, in which the insert 40 moves to the gear 20 about the axis X1. Although fixed to rotate, it is free to rotate with respect to the gear 20 about the axis X1, and in an uncoupled form, the insert 40 can be separated from the gear 20.

  The means 60 comprises at least one member 44 fixed to the insert 40 or gear 20 and at least one opening 27 located in the gear 20 or in the insert 40, which are connected from an unconnected form. It can be adapted to the form by mechanical cooperation, in particular clipping. This cooperation can be done by manual action and does not require any special tools. The member 44 and the corresponding opening 27 can extend in principle radially or in principle axially. Preferably, the means 60 includes a plurality of male members 44 and a plurality of female openings 27 distributed about the axis X1, each opening 27 at least partially enclosing one of the members 44 in a connected configuration. It is possible to accept. Likewise preferably, the coupling means 60 is completely mechanical and is not based on electromagnetic or friction.

  Furthermore, the pulley 1 can be formed in different forms without departing from the scope of the present invention. In particular, the connecting means 60, 160, 260, 360, 460, or 560 may be formed differently from the configurations of FIGS. 1-19 without departing from the scope of the present invention.

  In contrast, although not shown, the steady ring 30 can be replaced with an elastically deformable member suitable for the present invention, disposed between the insert 40 and the outer surface 14 of the hub 10. Preferably, this member is placed in direct contact with the insert 40 and the outer surface 14 of the hub 10. Also preferably, this member is secured to the insert 40 and hub 10 as described above with respect to the ring 30. More preferably, the member comprises at least one portion that is axially deformable between the hub 10 and the annular insert 40. According to a special example, this member may comprise a compression spring with an effect in the axial direction. According to another particular example, the compression spring may form one or more bevel washers.

  According to another alternative, not shown, the pulley 1 may not be provided with a steady ring 30 for certain equipment.

  Moreover, the technical features of the different embodiments may be combined with each other in whole or in some of them. Thus, the pulley is suitable for different equipment in terms of cost, function and performance.

DESCRIPTION OF SYMBOLS 1 ... Pulley 10 ... Hub 14 ... Outer cylindrical surface 20, 120, 320 ... Gear 22, 122 ... Rim 24 ... Outer periphery track 25 ... Slot 26 ... Edge 27 , 127, 327 ... opening 28 ... tab 30 ... steady ring 31 ... outer side 32 ... inner side 40, 140, 340, 540 ... annular insert 41 ... inside Cylindrical surface 42 ... Rear radial surface 43, 243 ... Tab,
44, 144, 244 ... Staple 45, 345 ... Base 46, 146 ... Tab 50 ... Rotating bearing 51 ... Outer ring 52 ... Inner ring 53 ... Rotating element 60, 160 , 260, 360, 460, 560..., Connecting means 328... Inner side edge 344... Slug 346 .. cylindrical portion 427 .. slot 428.・ ・ ・ Lug 543 ・ ・ ・ Bending part 545 ・ ・ ・ Diameter annular disk 548 ・ ・ ・ Connection part A ・ ・ ・ Drive shaft B ・ ・ ・ Bead C ・ ・ ・ Belt D ・ ・ ・ Washer E ・ ・ ・ Nut X1 ... central axis

Claims (14)

Transmission pulley (1) for automotive equipment, in particular an air conditioning compressor, the pulley (1)
A hub (10) centered on a central axis (X1) and capable of being fixed to a shaft (A) that is part of said automotive equipment;
A gear (20; 120; 320; 420) comprising a rim (22; 122; 322; 422) extending radially with respect to the central axis (X1) and an outer track (24); The truck uses a belt (C) to drive the gear (20; 120; 320; 420) to rotate (M1) (20; 120; 320; 420);
An annular insert (40; 140; 240; 340; 440; 540) fixed to the hub (10) for rotation;
Means (60; 160; 260; 360; 460; 560) for connecting the annular insert (40; 140; 240; 340; 440; 540) to the gear (20; 120; 320; 420); In the equipped pulley (1),
In the connecting means (60; 160; 260; 360; 460; 560), one (27, 28; 127, 128; 327, 328; 427, 428) is dispersed in the gear (20; 120; 320; 420). The other (43, 44; 43, 144; 243, 244; 43, 344; 43, 444; 543, 546, 548) is dispersed in the annular insert (40; 140; 240; 340; 440; 540) And is adaptable between connected and non-connected forms,
In the coupled configuration, the annular insert (40; 140; 240; 340; 440; 540) is rotatable (M1) about the central axis (X1) so that the gear (20; 120; 320; 420). And can be freely translated with respect to the gear (20; 120; 320; 420) along the central axis (X1), and the connecting means (60; 160; 260; 360; 460; 560). ) Allows an axial play parallel to the central axis (X1) between the gear (20; 120; 320; 420) and the annular insert (40; 140; 240; 340; 440; 540). ,
In the unconnected form, the annular insert (40; 140; 240; 340; 440; 540) can be separated from the gear (20; 120; 320; 420). Pulling pulley (1).   An elastically deformable member disposed around the central axis (X1) between the annular insert (40; 140; 240; 340; 440; 540) and the outer surface (14) of the hub (10). The pulley (1) according to claim 1, characterized in that it comprises (30).   In the connected form, the connecting means (60; 160; 260; 360; 460; 560) are the gear (20; 120; 320; 420) and the annular insert (40; 140; 240; 340; 440; The pulley (1) according to claim 1 or 2, characterized in that any rotational play around the central axis (X1) with respect to 540) is eliminated.   The connecting means (60; 160; 260; 360; 460; 560) are arranged in the radial direction relative to the central axis (X1) and the central axis (X1) during assembly and during use of the pulley (1). The pulley (1) according to any one of claims 1 to 3, characterized in that it comprises a flexible tab (43; 243; 543) in the axial direction with respect to.   The connecting means (60; 160; 260; 360; 460; 560) is adaptable between the connected configuration and the unconnected configuration without screwing. The pulley (1) as described in any one of 1-4.   The coupling means (60; 160; 260; 360; 460; 560) are generally connected to the annular insert (40; 140; 240; 340; in the axial direction opposite to the gear (20; 120; 320; 420). 440; 540) can be adapted from the connected configuration to the unconnected configuration without using any special tool. Pulley (1) according to paragraphs.   The connecting means (260; 560) includes at least one portion (243; 548), and in the connected form, the pulley (1) becomes overtorque exceeding a predetermined torque threshold. In addition, the portion can be plastically deformable, ruptureable, or fusing, and the plastic deformation, rupturing, or fusing of the portion (243; 548) connects the gear (120) and the annular insert (240). The pulley (1) according to any one of claims 1 to 6, wherein the pulley (1) is shifted to a non-operating form.   The connecting means (60; 160; 260; 360; 460; 560) is fixed to the annular insert (40; 140; 240; 340; 440; 540) or the gear (20; 120; 320; 420) At least one member (44; 144; 244; 344; 444; 544) and disposed within said gear (20; 120; 320; 420) or said annular insert (40; 140; 240; 340; 440; 540) At least one aperture (27; 127; 327; 427) that can be adapted from a non-coupled configuration to a coupled configuration by mechanical cooperation, in particular by clipping. 8. A pulley (1) according to any one of the preceding claims, characterized in that it is characterized in that The connecting means (60; 160; 260; 360; 460; 560)
At least one extending radially and / or axially with respect to the central axis (X1) from a portion (42, 43; 42, 243) of the annular insert (40; 140; 240; 340; 440; 540) Two members (44; 144; 244; 344; 444; 544);
At least one opening (27; 127; 327) arranged in the gear (20; 120; 320; 420) essentially radially or essentially axially with respect to the central axis (X1); 427), preferably a plurality of openings (27; 127; 327; 427) are distributed around said central axis (X1) or each opening (27; 127; 327; 427) , In linked form, at least partially receiving a member belonging to said annular insert (40; 140; 240; 340; 440; 540) or at least one member (44; 144; 244; 344; 444; 544) At least one opening (27; 127; 327; 427) that can be used. Over Li (1).   Said connecting means (60; 160; 260; 360; 460; 560) comprise elastically deformable staples (44; 144; 244), axial slugs (344) and / or radial lugs (444; 544). Pulley (1) according to any one of the preceding claims, characterized in that   The connecting means (360) has an opening that can receive a member (344) distributed in the gear (320) and fixed to the annular insert (340) around the central axis (X1). When the other member is disposed in another opening in the connected form, an angular offset is provided between the member (344) and the opening that receives the member. The angular offset eliminates any rotational play about the central axis (X1) between the gear (320) and the annular insert (340) in a coupled configuration. The pulley (1) as described in any one of claim | item 1 -10. A method for manufacturing the pulley (1) according to any one of the preceding claims, wherein the method comprises at least the following steps: a) manufacturing the hub (10);
b) the connecting means (60; 160; 260; 360; 460) for connecting to the rim (22), the outer track (24) and the annular insert (40; 140; 240; 340; 440; 540) 560) producing said gear (20; 120; 320; 420) provided with a first part (27, 28; 127, 128; 327, 328; 427, 428);
c) The second part (43, 44; 43, 144; 243, 244) of the connecting means (60; 160; 260; 360; 460; 560) for connecting the gear (20; 120; 320; 420) 43, 344; 43, 444; 543, 544, 545, 546, 547, 548), said annular insert (40; 140; 240; 340; 440; 540);
e) securing the annular insert (40; 140; 240; 340; 440; 540) to the hub (10) for rotation about the central axis (X1);
f) adapting said connecting means (60; 160; 260; 360; 460; 560) to connect said annular insert (40; 140; 240; 340; 440; 540) to said gear (20; 120; 320; 420) to form a fixed and connected form,
The method of manufacturing a pulley (1), wherein the steps a), b), and c) are completed before the step e) that is completed before the step f). In step a), the hub (10) includes an outer surface (14) suitable for receiving an elastically deformable member (30), and the manufacturing method includes the elastically deformable member (30). Comprising step d) consisting of manufacturing steps and step e) comprising the following sub-steps e1) and e2), said steps e1) and e2)
e1) placing the elastically deformable member (30) against the outer surface (14) of the hub (10); and e2) the annular insert (40; 140; 240; 340; 440; 540) The method for manufacturing a pulley (1) according to claim 12, characterized in that the elastically deformable member (30) is disposed on the pulley.   A method for disassembling a pulley (1) manufactured using the manufacturing method according to claim 12 or 13, wherein the disassembling method comprises the connecting means (60; 160; 260; 360; 460; 560), the annular insert (40; 140; 240; 340; 440; 540) is separated from the gear (20; 120; 320; 420) and the gear (20; 120; 320; 420) as a whole. Step g) comprising separating the connected form from the connected form by pulling the annular insert (40; 140; 240; 340; 440; 540) in the opposite axial direction. A method of disassembling the pulley (1) characterized by the above.

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