• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The present invention relates to a positioning actuator comprising a stator assembly and a rotor (6), a printed circuit (29) provided with electronic components, and a gear (4, 5) for driving a rotary member which comprises two complementary blocks (1, 2), the first block (1) consisting of an envelope having a thermal conductivity greater than or equal to 1W / m / K, - said first block (1) integrating said reducer (4, 5 ) and having a passage of the output shaft (11) of the gear (4, 5) and an open opposite surface, - said second block (2) being formed by overmolding the stator assembly (22) and having a rear bearing housing (23) of the rotor, said second block (2) having a complementary junction face with a junction face of said first block (1), the actuator being constituted by said electronic circuit (29) is positioned in a space defined between said first (1) and second block (2). It also relates to a method of manufacturing such an actuator.
    公开号:FR3032314A1
    申请号:FR1550881
    申请日:2015-02-04
    公开日:2016-08-05
    发明作者:Daniel Sigg；Philip Graf
    申请人:MMT SA；
    IPC主号:
    专利说明:

    [0001] FIELD OF THE INVENTION The present invention relates to the field of electromagnetic actuators, in particular actuators for motorized valves. By way of example, the general structure of such a motorized valve is described in the patent WO2010027447.
    [0002] In order to improve the robustness of such actuators, it is known to encapsulate a portion of the engine components in a plastic material. This overmolding maintains the components subjected to vibrations and promotes heat transfer. It also removes assembly operations by screwing or gluing. STATE OF THE ART In the state of the art, US Pat. No. US 6,620,206 describes a method for over-molding a stator structure, comprising a step of constructing an intermediate stator assembly, including the assembly of the assembly to be assembled. coil on a stator core having an inner and outer diameter, a step of disposing the intermediate stator assembly in a molding device comprising a half-cover and an ejection half comprising an inner core of the ejector and a plate mobile, and a step of loading a bearing into the molding device, and closing half of the cover causing the movable plate to circulate in the mold. Subsequently, a wrapping material is injected into the molding device to encapsulate the intermediate stator assembly and form an overmolded motor stator structure. Also known is patent FR2887376 describing a single-phase electromagnetic servo-actuator composed of a rotary actuator intended to move a movable member over a limited stroke, comprising a stator structure with 2N 5 poles, N being equal to 1 or 2, and at least one excitation coil, said stator structure being made of a material of high magnetic permeability, and a rotor having a ferromagnetic yoke and a magnetized thin portion consisting of 2N pairs of axially-magnetized poles in alternating directions and an angular position sensor of the rotor characterized in that the position sensor has a magnetic field emitter integral with the yoke and a receiver of said fixed magnetic field with respect to the stator structure. International Patent Application WO2010138455 discloses another example of a brushless rotary actuator which comprises a housing comprising a motor housing defining a cavity for a motor assembly and a cover defining a cavity for a gear assembly. The motor assembly comprises a rotor and a stator having a plurality of coils. A clip in the form of an annular plate sits against the coils to retain the coils on the stator. Fingers formed on the annular plate are housed in respective female connectors defined by respective coil terminals. A printed circuit board sits in the housing against an inner shoulder of the motor housing. A plate is seated in the housing against a peripheral edge of the motor housing in spaced relation above the printed circuit board. Disadvantages of the Prior Art The prior art solutions relate to the production of an overmolded stator structure, which is then conventionally assembled with the other engine components. They do not avoid vibration problems with a large number of subassemblies to be joined and heat dissipation between the various components of the actuator, especially when the electronics are positioned close to the stator assembly and the opposite of the cooling circuits. They also require a large number of components and, generally, several seals, making the assembly more complex.
    [0003] Solution Provided by the Invention In order to overcome these drawbacks, the present invention relates, in its most general sense, to a positioning actuator comprising a stator assembly and a rotor, a printed circuit provided with electronic components, as well as a gearbox for driving a rotary member characterized in that it comprises two complementary blocks, the first block consisting of an envelope having a thermal conductivity greater than or equal to 1 W / m / K, said first block incorporating said reducer and having a passage of the output shaft of the gear as well as an open opposite surface, said second block being constituted by overmolding of the stator assembly and having a rear rolling bearing housing of the rotor, said second block having a complementary junction face with a junction face of said first block, the actuator being further characterized in that said electrical circuit onique is positioned in a space defined between said first and second blocks. Thus, the assembly of the actuator is simplified compared to the state of the art and the electronic circuit can benefit from a favorable thermal conductivity of the first block to ensure an acceptable working temperature. Advantageously, said junction face of said second block has a peripheral groove for receiving a seal adapted to bear on the complementary face of said first block.
    [0004] Alternatively, it is the first block which has a peripheral groove for receiving a seal adapted to bear against the complementary junction face of said second block. One can also imagine that a seal 10 is positioned in abutment facing the junction faces of the first and second blocks. Thus, the actuator requires only one assembly step where we consider the two assemblies that are assembled and between which is positioned a single seal 15. Preferably, the bearings present, and particularly the bearing of the rotor, have at least one groove receiving an annular seal capable of being compressed during insertion into said housing of the second block. In this way, the insertion of the bearings incorporating at least one annular seal ensures on one hand a seal but also a mechanical support on the other hand. It is thus not necessary to add a preload to the bearing to avoid deterioration of the actuator when it is subjected to vibrations in the application. According to a variant, said first block has a housing for receiving a front bearing of the rotor. Advantageously, the front bearing of the rotor has at least one groove receiving an annular seal capable of being compressed during insertion into said housing of the first block. According to a particular variant, the first block is made of a material of high thermal conductivity and comprises a circulation circuit of a cooling fluid. According to a particular embodiment, the electrical connection between the stator elements and the printed circuit is achieved by connection pins overmolded in said second block.
    [0005] According to a variant, the second block also comprises an overmolded connector. Advantageously, said second block has a connection assembly formed of a plurality of pins having a connection zone with an electrical wire 10 extended by a connection pin with the printed circuit. In a particular embodiment, said connection assembly is provided with a plurality of female connectors, for insertion and maintenance of connection pins between a wire and a track of the printed circuit. Advantageously, said overmolded connection assembly has a flange for coupling with a protective sheath of a cable bundle. Preferably, the thickness of the overmolding of the inner portion of the stator is greater than the thickness of the overmoulding of the outer portion of the stator. The term "inner portion" the portion of the stator including coils located in the interface space between the first and second block. This characteristic makes it possible to favor heat exchanges towards the outside of the actuator. The invention also relates to a method of manufacturing an overmoulded stator assembly for a positioning actuator according to at least one of the preceding claims, characterized in that a stator assembly is positioned in a mold with the aid of a gripper having pins adapted to penetrate axially oriented complementary orifices provided on the stator structure, the mold having a central hub of complementary section to the inner section of the stator structure, the mold further having at least one pin; - 6 - for the angular positioning of the stator structure when it is introduced into the mold by means of the gripper. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT The present invention will be better understood on reading the description which follows, relating to a nonlimiting exemplary embodiment with reference to the accompanying drawings, in which: FIG. 1 represents a sectional view of 2 represents a perspective view of the actuator of FIG. 1; FIG. 3 represents a perspective view of a first variant of said actuator; FIG. partial sectional view of the embodiment shown in FIG. 3; FIG. 5 represents a view of an overmoulded beam that can be used in a second variant of the actuator; FIG. 6 represents a perspective view of the second variant; variant of the actuator; FIGS. 7a to 7c show schematic views of different possible watertight junctions of the two blocks according to the invention. FIG. 1 represents an example of an actuator consisting of two connected complementary blocks (1, 2). The first block (1) consists, in the present example, of a metal shell (3) made by aluminum casting for example. This first block (1) can also be envisaged made of a material having good thermal conductivity (typically greater than 1 W / m / K) such as a plastic loaded with silica or aluminum particles. The first block (1) comprises a reducer - 7 - formed by a first stage (4) and a second stage (5). The first stage (4) has a driving gear integral with the rotor (6) and a driven gear supported by an axle (8) and driving an intermediate gear (9).
    [0006] This intermediate gear (9) is part of the second stage (5), and drives the gear (10) integral with the output shaft (11). The shell (3) has the bores for receiving the bearings, including a housing (12) for the front bearing (13) and a second housing (14) for rolling (15) for guiding the shaft (8). These bearings advantageously have at least one groove for receiving a seal, generally annular. This seal then ensures sealing and mechanical support when the bearing is installed, compressed, in its housing. This device thus makes it possible to guarantee that the actuator is held under vibration without necessarily needing a pre-load spring. In Figure 1 is shown a spring washer (66) in the front housing (12) under the bearing (13), in case the vibrations applied are particularly important. A lip seal (16) seals between the shaft (11) and the shell (3). The shell (3) also has a rear housing (17) in which is engaged a bearing (18) for guiding the motor shaft (19). A spring (20) provides pressure exerted on the front end face (21) of the shell (3) and the gear (10). This spring ensures the return to the "fail-safe" safety position in the event of malfunction of the actuator. The second block (2) comprises a stator assembly (22) and a rear bearing (23) overmolded in a mass of thermosetting plastic (24), the outer configuration of which forms fastening tabs (25). - 8 - The rear bearing (23) has two annular grooves (37, 38) in which are housed elastic joints (39, 40) to ensure mechanical attachment in the cavity provided at the rear of the second block (2) .
    [0007] The rear bearing (23) can thus be inserted into the second block (2) by a force insertion in an axial direction. This block (2) has a peripheral groove (26) for housing a seal (27) sealing the two blocks (1, 2). This peripheral groove (26) could also be provided on the first block (1) only, or on the two blocks (1, 2). The mechanical connection between the two blocks (1, 2) is provided by screws (28) passing through the tab (25) and fixing in a thread provided in the first block (1). A printed circuit (29) is housed in the space defined between the block (1) and the block (2). This printed circuit (29) comprises the engine control electronic components as well as the sensors (30) detecting the magnetic position of the rotor (6). On the opposite side, the printed circuit (29) comprises a sensor (31) for detecting the angular position of the output shaft (11). This printed circuit (29) is mechanically fastened to the second block (2) by screws (32). The electrical connection between the printed circuit (29) and the cable harness (33) is provided by an overmoulded connector (34) integrated in the second block (2). For this purpose, the printed circuit (29) has tin-plated holes for cooperating with connectors of the "pressfit" type (35) which themselves engage in female connectors (36) overmolded in the second block (2). . Alternatively, the "pressfit" type connectors (35) can extend the connector (34) and be directly overmolded in the block (2). The electronic circuit (29) is pierced to allow passage of the shaft (19) of the rotor (11). The connector (34) has a flange (42) providing protection for the cable bundle (33). In the example described, the first block (1) also comprises a cooling circuit by circulating a heat transfer fluid. In a particular embodiment, the front block (1) has a housing for receiving the end of a pre-assembled cable bundle (33), integrating the connectors (36). For this purpose, the block (1) has a cavity (41) whose ends open on the surface of the block (1), to allow connection to fluid inlet and outlet ducts. Fixing the assembly is provided by columns (43) formed in the first block (1) for connection by screws, rivets or any other usual means. Figure 2 shows an outer perspective view of the actuator. The second block (2) of plastic material has a generally cylindrical portion (44) matching the shape of the stator, then flaring to a second portion (45) opening on the connecting surface with the first block (1) .
    [0008] Stiffeners (46 to 52) extend between these two portions (44, 45) to provide good strength, and limit the thickness of the overmoulding. The protuberances (58 to 60) correspond to overmolding of the bun of the stator coils.
    [0009] The first block (1) has on one side an inlet (53) opening into the cooling cavity (41) and on the opposite side an outlet (54) for connection to a cooling system. by circulating a heat transfer fluid. Fixation is ensured by means of the columns (43, 55, 56, 57). Figures 3 and 4 show a variant of the invention, respectively in perspective view and in partial section along a plane passing through a male connector (65) formed by overmoulded forming of the block (2). The connection is provided according to this embodiment by metal pins (61 to 64) overmolded in the second block (2). The rear ends of the pins (61 to 64) are free to allow the engagement of a complementary female connector. The section of the rear portion of this connection area is complementary to the section of the connectors extending a cable bundle. The front ends are configured to allow insertion on the printed circuit, for example via "Pressfitt" sockets or welding. In an alternative embodiment, it may be envisaged to make the cable bundle (33) apart from the motor, and directly connected by overmolding (67) to the connectors of the "pressift" type (35). This overmoulded beam is shown in FIG. 5. It is intended for a second embodiment of the actuator, as shown in FIG. 6, where the molded connector (34) is intended to receive directly, by simple mechanical insertion and possibly bonding. or welding, this bundle (33) overmolded. The sealing between the two blocks (1) and (2) can be achieved in several ways as can be seen schematically shown in sectional views in FIGS. 7a to 7c. In Figure 7a, the block (2) has a groove (26) for receiving a seal (27) adapted to bear against the complementary junction face of the block (1). In FIG. 7b, it is the block (1) which has a groove (26) intended to receive a seal (27) able to bear on the complementary junction face of the block (2). In Figure 7c, a wide joint type "head gasket" is simply positioned between the two blocks (1) and (2).
    权利要求:
    Claims (2)
    [0001]
    REVENDICATIONS1. Positioning actuator comprising a stator assembly and a rotor (6), a printed circuit (29) provided with electronic components, and a gearbox (4, 5) for driving a rotary member characterized in that it comprises two complementary blocks (1,
    [0002]
    2), the first block (1) consisting of an envelope having a thermal conductivity greater than or equal to 1W / m / K, said first block (1) integrating said reducer (4, 5) and having a passage of the output shaft (11) of the gearbox (4, 5) and an opposite open surface, - said second block (2) being formed by overmolding the stator assembly (22) and having a rear bearing housing (23). of the rotor, said second block (2) having a complementary junction face with a junction face of said first block (1), the actuator being further characterized in that said electronic circuit (29) is positioned in a defined space 20 between said first (1) and second block (2). 2 - positioning actuator according to 1 characterized in that said block junction face (2) has a peripheral groove (26) a sealing gasket (27) able to bear claim said complementary second junction of said first block (1). ). 25 for receiving on the face d 3 Positioning actuator according to claim 1 characterized in that said junction face 30 of said first block (1) has a peripheral groove (26) for receiving a seal (27) suitable for coming resting on the complementary junction face of said second block (2). 4 - positioning actuator according to claim 1 characterized in that a seal-13 - (27) is positioned in abutment facing the junction faces of the first (1) and second blocks (2). - Positioning actuator according to claim 1 characterized in that it comprises a plurality of bearings and in that at least the rear bearing (23) of the rotor has at least one groove (37, 38) receiving an annular seal (39, 40). capable of being compressed during insertion into said housing of the second block (2). 6 - Positioning actuator according to claim 1 characterized in that said first block (1) has a housing (12) for receiving a front bearing (13) of the rotor. 7 Positioning actuator according to claim 6 characterized in that the front bearing (13) of the rotor has at least one groove receiving an annular seal capable of being compressed during insertion into said housing of the first block. 8 - Positioning actuator according to any one of claims 1 to 7 characterized in that the first block (1) is made of a material of high thermal conductivity and comprises a circulation circuit (41) of a cooling fluid . 9 - Positioning actuator according to any one of claims 1 to 8 characterized in that an electrical connection between the stator elements and a printed circuit (29) is formed by connection pins (36) overmolded in said second block ( 2). 10 - positioning actuator according to any one of claims 1 to 9 characterized in that the second block (2) also comprises a connector (34) overmolded. 11 - Positioning actuator according to any one of claims 1 to 10 characterized in that said second block (2) has a connection assembly formed of a plurality of pins (36) having a connection zone with a prolonged electric wire by a connection pin with the printed circuit (29). 12 - Positioning actuator according to claim 11 characterized in that said connection assembly (36) has a plurality of female connectors, for insertion and maintenance of connection pins between a wire and a printed circuit track. 13 - Positioning actuator according to any one of claims 9 to 12 characterized in that said overmoulded connection assembly has a flange (42) for coupling with a protective sheath of a cable bundle. 14 - Positioning actuator according to any one of claims 1 to 13 characterized in that the thickness of the overmoulding of the inner portion of the stator is greater than the thickness of the overmoulding of the outer portion of the stator. 15 - Method for manufacturing an overmoulded stator assembly for a positioning actuator according to any one of claims 1 to 14, characterized in that a stator assembly is positioned in a mold with the aid of a gripper having pins capable of penetrating into complementary axially oriented orifices provided on the stator structure, the mold having a central hub of complementary section to the inner section of the stator structure, the mold furthermore presenting to the end a pin for the angular positioning of the stetorigue structure when it is introduced into the mold using the gripper.
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    同族专利:
    公开号 | 公开日
    FR3032314B1|2017-01-20|
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    KR20170108138A|2017-09-26|
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    CN110631471B|2019-08-29|2021-08-31|武汉铁盾民防工程有限公司|Miniature steering engine capable of detecting angle by using magnetic sensor and detection method thereof|
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    法律状态:
    2016-01-22| PLFP| Fee payment|Year of fee payment: 2 |
    2016-08-05| PLSC| Publication of the preliminary search report|Effective date: 20160805 |
    2017-01-24| PLFP| Fee payment|Year of fee payment: 3 |
    2018-01-23| PLFP| Fee payment|Year of fee payment: 4 |
    2020-01-22| PLFP| Fee payment|Year of fee payment: 6 |
    2021-01-20| PLFP| Fee payment|Year of fee payment: 7 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1550881A|FR3032314B1|2015-02-04|2015-02-04|POSITIONING ACTUATOR AND METHOD OF MANUFACTURING|FR1550881A| FR3032314B1|2015-02-04|2015-02-04|POSITIONING ACTUATOR AND METHOD OF MANUFACTURING|
    PCT/EP2016/052435| WO2016124715A1|2015-02-04|2016-02-04|Positioning actuator and manufacturing method|
    CN201680014494.6A| CN107534358B|2015-02-04|2016-02-04|Positioning actuator and method of manufacturing the same|
    EP16705452.7A| EP3254360B1|2015-02-04|2016-02-04|Positioning actuator and manufacturing process|
    JP2017541095A| JP2018507673A|2015-02-04|2016-02-04|Positioning actuator and manufacturing method|
    KR1020177024185A| KR20170108138A|2015-02-04|2016-02-04|Positioning Actuator and Manufacturing Method|
    US15/548,556| US10720810B2|2015-02-04|2016-02-04|Positioning actuator and manufacturing method|
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