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CN-122003585-A - Fixing bracket and method for manufacturing the same

CN122003585ACN 122003585 ACN122003585 ACN 122003585ACN-122003585-A

Abstract

The invention relates to a fixing bracket for fixing a temperature sensor (200), in particular for fixing a temperature sensor (200) in an electric machine, comprising a fixing part (3) configured to be fixed to an object to be sensed, in particular to a bus bar of the electric machine, and a holding part (5) for holding the temperature sensor (200), the holding part (5) comprising a holding section (11 a,11 b), the holding section (11 a,11 b) being configured to receive and fasten the temperature sensor (200) along an insertion direction (I1). At least a part of the fastening part (3) is integral with at least a part of the holding section (11 a,11 b) and is made of a thermally conductive material, in particular a thermally conductive material having a thermal conductivity of more than 15W/(m.K), preferably more than 50W/(m.K). The invention also relates to a method for producing a fastening bracket (1, 1').

Inventors

  • Puventan. A
  • CHEN DINGWU
  • LUO WAIYANG
  • M. Raventilan
  • B. R. Shivaprakash
  • N. Natalayan
  • K. SINGER
  • P. Tannigachalam
  • V. Budri
  • R. Cindel
  • U. Bloomer

Assignees

  • 泰科电子连接印度私有有限公司
  • 泰连比利时公司
  • 泰科电子连接解决方案有限责任公司
  • 泰科电子科技（苏州工业园区）有限公司

Dates

Publication Date
20260508
Application Date
20231009

Claims (15)

  1. 1. A fixing bracket for fixing a temperature sensor (200), in particular for fixing a temperature sensor (200) in an electric machine, comprising: a fixing part (3) configured to be fixed to an object to be sensed, in particular a bus bar of the motor, and A holding part (5) for holding the temperature sensor (200), the holding part (5) comprising a holding section (11 a), the holding section (11 a) being configured to receive and fasten the temperature sensor (200) along an insertion direction (I1), Characterized in that at least a part of the fixing element (3) is integral with at least a part of the holding section (5) and is made of a thermally conductive material, in particular a thermally conductive material having a thermal conductivity of more than 15W/(m.K), preferably more than 50W/(m.K).
  2. 2. The fixing bracket according to claim 1, wherein the entire fixing part (3) is integral with a part of the holding section (11 a) made of the heat-conducting material, in particular with the entire holding section (11 a) or the entire holding part (5).
  3. 3. The fixation bracket of claim 1 or 2, wherein the thermally conductive material comprises a metal, in particular the thermally conductive material is a metal.
  4. 4. A fixing bracket according to claim 3, wherein the metal comprises copper, in particular the metal is based on copper.
  5. 5. The fixing bracket according to claim 4, wherein the metal comprises a copper-tin alloy, preferably bronze, or a copper-nickel alloy, or a copper-silicon alloy, in particular the metal is a copper-tin alloy, preferably bronze, or a copper-nickel alloy, or a copper-silicon alloy.
  6. 6. The fixing bracket according to any one of claims 1 to 5, wherein the thermally conductive material has a tensile strength of more than 250 MPa, in particular more than 350 MPa, preferably more than 500 MPa.
  7. 7. The fixing bracket according to any one of claims 1 to 6, wherein the portion made of the thermally conductive material is a stamped and bent sheet, in particular the entire fixing bracket (1, 1') is a stamped and bent sheet.
  8. 8. The fixation bracket according to any one of claims 1 to 7, wherein the holding part (5) comprises at least one further holding section (11 b), the one further holding section (11 b) being configured to receive and fasten a respective further temperature sensor (200), in particular along a direction (I2) parallel to the insertion direction (I1).
  9. 9. The fixing bracket according to any one of claims 1 to 8, wherein each holding section (11 a,11 b) comprises a base (13), a cover (15) and two side portions (17), the base (13), the cover (15) and the two side portions (17) being arranged to form a respective groove, in particular a rectangular groove (19), for receiving a respective temperature sensor (200).
  10. 10. The fixing bracket according to claim 9, wherein each holding section (11 a,11 b) comprises at least one spring arm (23), which at least one spring arm (23) protrudes into the groove (19), in particular from the cover (15) into the groove (19), wherein the spring arm (23) is configured to engage with a respective temperature sensor (200).
  11. 11. The fixation bracket according to any one of claims 1 to 10, wherein the fixation member (3) comprises a through hole (7), in particular a through hole (7) configured to receive a fastener for fixing the fixation member (3) to the object to be sensed.
  12. 12. Sensor assembly comprising a stationary support (1, 1') according to any one of claims 1 to 11, and a temperature sensor, in particular a Negative Temperature Coefficient (NTC) sensor (200), Wherein the temperature sensor (200) is received in the holding section (11 a) of the fixing bracket (1), in particular in a groove (19) of the holding section (11 a,11 b), and the holding section (11 a,11 b) comprises a crimp (25) crimped onto the temperature sensor (200).
  13. 13. The sensor assembly of claim 12, further comprising a bus bar, wherein the fixing member is fixed to the bus bar, in particular by a fastener received in a through hole of the fixing member and fastened to the bus bar.
  14. 14. Sensor assembly according to claim 12 or 13 in combination with claim 9, wherein at least one of the cover part (15), the base part (13) and one of the side parts (17) comprises a first form-fitting element, in particular a recess, preferably a punched hole (27), facing the groove (19), and The temperature sensor (200) comprises a second form-fitting element, in particular a projection or bump (211), formed on its outwardly facing surface, Wherein the second form-fitting element (211) is configured to realize a form-fitting connection with the first form-fitting element (27) when the temperature sensor (200) is received in the groove (19).
  15. 15. A method for manufacturing a fixing bracket (1, 1') according to any one of claims 1 to 14, comprising the steps of: (a) Providing a metal sheet, in particular made of a thermally conductive material, in particular a thermally conductive material having a thermal conductivity of more than 15W/(m.K), preferably more than 50W/(m.K), (B) Stamping a fixing part (3) and a holding part (5) in the sheet metal, the fixing part (3) being configured to be fixed to an object to be sensed, in particular to a bus bar of an electric motor, the holding part (5) being for holding the temperature sensor (200), the holding part (5) comprising a holding section (11 a,11 b), wherein a part of the fixing part (3) is integral with at least a part of the holding section (11 a,11 b), and (C) The stamped sheet metal is bent such that the holding sections (11 a,11 b) are configured to receive and fasten a temperature sensor (200) along an insertion direction (I1).

Description

Fixing bracket and method for manufacturing the same Technical Field The invention relates to a fastening bracket for fastening a temperature sensor, in particular in an electric motor. The invention also relates to a method for producing a fastening bracket. Background It is known to include temperature sensors in motor assemblies for monitoring their operating health. For example, in an electric motor of an electric drive unit, a temperature sensor may be used to sense the temperature of the electrical conductors of the stator of the motor assembly. Typically, a temperature sensor is attached near the stator winding to measure its temperature. In known solutions, adhesive or thermal glue is used. However, in high temperature and vibration-intensive environments of the motor, the solution may have insufficient reliability and/or durability. In other cases, the plastic holder is manually assembled with the temperature sensor and the stator winding temperature target device. These cases require that the stator be designed to include a dedicated stator winding temperature target device for assembly with the temperature sensor and plastic retainer, which means increased design, manufacturing and assembly complexity, resulting in increased costs. Disclosure of Invention It is therefore an object of the present invention to provide a solution for fixing a temperature sensor, in particular in an electric machine, which is improved with respect to the solutions of the prior art and which overcomes the above-mentioned drawbacks. The object of the invention is achieved by a fastening bracket for fastening a temperature sensor, in particular in an electric motor, according to claim 1. The fixing bracket comprises a fixing part configured to be fixed to an object to be sensed, in particular to a bus bar of the motor, and a holding part for holding the temperature sensor, the holding part comprising a holding section configured to receive and fasten the temperature sensor along an insertion direction. The fastening device is characterized in that at least a part of the fastening part is integral with at least a part of the holding section and is made of a thermally conductive material, in particular a thermally conductive material having a thermal conductivity of more than 15W/(m.K), preferably more than 50W/(m.K). Since the fixing member is integrally constructed with the holding member, once the sensing portion of the temperature sensor is in thermal contact with the holding member, the temperature of the target can be sensed. Thus, the fixing bracket simultaneously allows the temperature sensor to be fixed to the target to be sensed, and allows the target to be sensed remotely by heat conduction through the heat conductive member through only one member. This reduces the number of parts or custom design or manufacturing steps involved in securing the temperature sensor. In particular, in case the thermal conductivity value is higher than 15W/(m.k), preferably higher than 50/(m.k), the portion made of the thermally conductive material conducts heat to ensure reliable sensing of the temperature of the object to be sensed. According to one aspect of the invention, the entire fixing part may be integral with a part of the holding section made of a thermally conductive material, in particular with the entire holding section or the entire holding part. Increasing the proportion of the fixing part and/or the holding part made of a heat-conducting material improves the heat-conducting properties of the fixing bracket. According to one aspect of the invention, the thermally conductive material may comprise a metal, in particular the thermally conductive material may be a metal. The metal may be highly customizable with respect to the achievement of desired properties, in particular with respect to thermal conductivity, tensile strength, corrosion resistance, chemical compatibility, and/or electromagnetic properties. According to one aspect of the invention, the metal may comprise copper, in particular the metal may be based on copper. In particular, the metal may comprise either deoxidized copper, or a copper alloy, such as a copper-tin alloy, e.g. bronze, or a copper-nickel alloy or a copper-silicon alloy. These materials may have increased thermal conductivity, which may improve the accuracy and speed of temperature sensing by the received temperature sensor. According to one aspect of the invention, the thermally conductive material may have a tensile strength of greater than 250 MPa, in particular greater than 350 MPa, preferably greater than 500 MPa. When materials having these tensile strengths are selected, the stability of the temperature sensor received and fastened in the holding part is improved, thereby reducing the risk of damage due to vibrations. According to one aspect of the invention, the portion made of thermally conductive material is a stamped and bent sheet. In particular, the entire fixing bracket may