WO2023036231A1 - Strain relief sleeve and thermocouple sensor connection assembly - Google Patents

Strain relief sleeve and thermocouple sensor connection assembly Download PDF

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Publication number
WO2023036231A1
WO2023036231A1 PCT/CN2022/117777 CN2022117777W WO2023036231A1 WO 2023036231 A1 WO2023036231 A1 WO 2023036231A1 CN 2022117777 W CN2022117777 W CN 2022117777W WO 2023036231 A1 WO2023036231 A1 WO 2023036231A1
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WO
WIPO (PCT)
Prior art keywords
electric cable
strain relief
relief sleeve
body portion
retaining portion
Prior art date
Application number
PCT/CN2022/117777
Other languages
English (en)
French (fr)
Inventor
Xue JIANG
Jun Yin
Original Assignee
Wuxi Valeo Automotive Components and Systems Co., Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Wuxi Valeo Automotive Components and Systems Co., Ltd. filed Critical Wuxi Valeo Automotive Components and Systems Co., Ltd.
Publication of WO2023036231A1 publication Critical patent/WO2023036231A1/en

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K7/00—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements
    • G01K7/02—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using thermoelectric elements, e.g. thermocouples
    • G01K7/023—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using thermoelectric elements, e.g. thermocouples provided with specially adapted connectors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/58—Means for relieving strain on wire connection, e.g. cord grip, for avoiding loosening of connections between wires and terminals within a coupling device terminating a cable
    • H01R13/5804—Means for relieving strain on wire connection, e.g. cord grip, for avoiding loosening of connections between wires and terminals within a coupling device terminating a cable comprising a separate cable clamping part
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/46—Bases; Cases
    • H01R13/502—Bases; Cases composed of different pieces
    • H01R13/5025—Bases; Cases composed of different pieces one or more pieces being of resilient material
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/46—Bases; Cases
    • H01R13/502—Bases; Cases composed of different pieces
    • H01R13/506—Bases; Cases composed of different pieces assembled by snap action of the parts
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/56—Means for preventing chafing or fracture of flexible leads at outlet from coupling part
    • H01R13/562—Bending-relieving
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/58—Means for relieving strain on wire connection, e.g. cord grip, for avoiding loosening of connections between wires and terminals within a coupling device terminating a cable
    • H01R13/5804—Means for relieving strain on wire connection, e.g. cord grip, for avoiding loosening of connections between wires and terminals within a coupling device terminating a cable comprising a separate cable clamping part
    • H01R13/5812—Means for relieving strain on wire connection, e.g. cord grip, for avoiding loosening of connections between wires and terminals within a coupling device terminating a cable comprising a separate cable clamping part the cable clamping being achieved by mounting the separate part on the housing of the coupling device
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G15/00—Cable fittings
    • H02G15/007—Devices for relieving mechanical stress

Definitions

  • Embodiments of the present disclosure relate to a strain relief sleeve for an electric cable connector and a thermocouple sensor connection assembly.
  • Electric cables of digital thermocouple sensors are continuous carriers for various components in a vehicle, and mainly play a role of ensuring transmission of electric signals and also the reliability of connected circuits, thereby providing specified current values to electronic and electrical elements, preventing electromagnetic interference to surrounding circuits, and eliminating electrical short circuits. If an electric cable connected to an electric cable connector of a thermocouple sensor is dragged or pulled towards a lateral direction deviating from an electric cable insertion direction, various stresses (e.g. a pulling stress) are generated on the electric cable. In the process of repeated dragging or pulling, the electric cable is prone to rupture, breakage and other damage under the action of the stresses.
  • stresses e.g. a pulling stress
  • Embodiments of the present disclosure provide a strain relief sleeve for an electric cable connector, the strain relief sleeve comprising: a body portion and at least one electric cable retaining portion.
  • the body portion has a first end and a second end opposite to each other in an electric cable insertion direction, the first end having an open opening.
  • the at least one electric cable retaining portion is connected to the second end of the body portion and extends away from the second end of the body portion, an internal space of the at least one electric cable retaining portion being in communication with an internal space of the body portion.
  • the at least one electric cable retaining portion is elastically flexible relative to the body portion.
  • thermocouple sensor connection assembly comprising: an electric cable connector; at least one cable; and the strain relief sleeve according to any of the above.
  • the strain relief sleeve is engaged with the electric cable connector via the body portion, and the at least one cable passes through a corresponding electric cable retaining portion of the strain relief sleeve and is then connected to the electric cable connector.
  • a strain relief sleeve can effectively reduce or relieve an unfavorable stress generated in an insertion end of the electric cable, and can also avoid undesired stresses arising in portions of the electric cable that are located outside and adjacent to the strain relief sleeve, thereby avoiding damage due to these unfavorable stresses.
  • the body portion is cylindrical, and the at least one electric cable retaining portion is tubular.
  • the strain relief sleeve comprises a plurality of electric cable retaining portions, the plurality of electric cable retaining portions being elastically flexible independently of each other.
  • the strain relief sleeve is a housing having a predetermined thickness.
  • the predetermined thickness is in the range of 1 mm to 2 mm.
  • strain relief sleeve itself is compact and does not take up too much space.
  • the material of the at least one electric cable retaining portion and the body portion is at least one of silicone rubber, polyurethane, and fluororubber.
  • the strain relief sleeve is suitable for use as a strain relief sleeve for cables around an engine due to its excellent temperature resistance, oil resistance, vibration resistance and friction resistance.
  • the at least one electric cable retaining portion and the body portion have a Shore A hardness value in the range of 60 to 80. In this way, the strain relief sleeve can provide excellent support protection for an insertion end of the cable.
  • the at least one electric cable retaining portion and the body portion have an elongation of fracture in the range of 110%to 340%. In this way, the strain relief sleeve itself is less prone to damage.
  • the body portion and the at least one electric cable retaining portion are integrally formed by an injection molding process.
  • the strain relief sleeve has a simple manufacturing process and is easy to mass-produce.
  • the body portion comprises a snap-fitting structure at the opening that is engaged with the electric cable connector.
  • the snap-fitting structure is a depression on an inner wall of the body portion that at least partially extends annularly.
  • the snap-fitting structure is a plurality of depressions discretely distributed on the inner wall of the body portion.
  • the plurality of depressions are through holes.
  • the plurality of depressions each have a T-shaped profile.
  • FIG. 1 is a three-dimensional schematic structural diagram of a strain relief sleeve for an electric cable connector provided in a first embodiment of the present disclosure
  • FIG. 2 is a schematic sectional structural diagram of the strain relief sleeve in FIG. 1 along the line AA’;
  • FIG. 3 is a schematic sectional structural diagram of a thermocouple sensor connection assembly provided in a first embodiment of the present disclosure
  • FIG. 4A and FIG. 4B are three-dimensional schematic structural diagrams from different perspectives of a strain relief sleeve for an electric cable connector provided in a second embodiment of the present disclosure.
  • FIG. 5 is a schematic sectional structural diagram of a thermocouple sensor connection assembly provided in a second embodiment of the present disclosure.
  • connection or “connected” and variations thereof are not limited to a physical or mechanical connection, but can include an electrical connection, whether directly or indirectly.
  • Embodiments of the present disclosure provide a strain relief sleeve for an electric cable connector.
  • a strain relief sleeve can effectively reduce or relieve an unfavorable stress generated in an insertion end of the electric cable, and can also avoid undesired stresses arising in portions of the electric cable that are located outside and adjacent to the strain relief sleeve, thereby avoiding damage due to these unfavorable stresses.
  • FIG. 1 is a three-dimensional schematic structural diagram of a strain relief sleeve for an electric cable connector provided in a first embodiment of the present disclosure
  • FIG. 2 is a schematic sectional structural diagram of the strain relief sleeve in FIG. 1 along the line AA’
  • FIG. 3 is a schematic sectional structural diagram of a thermocouple sensor connection assembly provided in a first embodiment of the present disclosure.
  • strain relief sleeve 100 for an electric cable connector and a thermocouple sensor connection assembly 10 provided in a first embodiment of the present disclosure are described with reference to FIG. 1 to FIG. 3.
  • the strain relief sleeve 100 comprises a body portion 110, and further comprises a first electric cable retaining portion 121 and a second electric cable retaining portion 122 that are connected to the body portion 110.
  • the body portion 110 has a first end and a second end opposite to each other in an electric cable insertion direction.
  • the first end of the body portion 110 has an open opening P.
  • the electric cable insertion direction is for example a lengthwise direction of a channel on the electric cable connector matching the strain relief sleeve 100 that is configured for mounting an electric cable (also referred to as a cable) .
  • the electric cable insertion direction can for example be a direction in which the strain relief sleeve 100, in an initial state without significant deformation, points from the first electric cable retaining portion 121 and/or the second electric cable retaining portion 122 to the body portion 110.
  • the electric cable insertion direction is a linear direction.
  • the body portion 110 is cylindrical, and the first electric cable retaining portion 121 and the second electric cable retaining portion 122 are each tubular.
  • the terms “cylindrical” and “tubular” are not intended to denote any significant distinction in shape.
  • the cylindrical body portion 110 can have a similar shape with either of the first electric cable retaining portion 121 and the second electric cable retaining portion 122.
  • the body portion 110 has a flatter cylindrical shape than either of the first electric cable retaining portion 121 and the second electric cable retaining portion 122, while either of the first electric cable retaining portion 121 and the second electric cable retaining portion 122 can have a rounder tubular shape than the body portion 110.
  • the specific shape of any one of the body portion 110, the first electric cable retaining portion 121 and the second electric cable retaining portion 122 is not restricted here.
  • the first electric cable retaining portion 121 and the second electric cable retaining portion 122 are both connected to the second end of the body portion 110 and extend away from the second end of the body portion 110. Internal spaces of the first electric cable retaining portion 121 and the second electric cable retaining portion 122 are in communication with an internal space of the body portion 110. The internal spaces of the first electric cable retaining portion 121, the second electric cable retaining portion 122 and the body portion 110 are in communication as one serving as the internal space of the body portion 110.
  • a central axis X 0 of at least a portion of the body portion 110, a central axis X 1 of at least a portion of the first electric cable retaining portion 121, and a central axis X 2 of at least a portion of the second electric cable retaining portion 122 are all linear and are substantially parallel to each other.
  • embodiments of the present disclosure are not limited to this.
  • the central axis X 1 of at least the portion of the first electric cable retaining portion 121 and the central axis X 2 of at least the portion of the second electric cable retaining portion 122 are both linear and are substantially parallel to each other; but the central axis X 1 of at least the portion of the first electric cable retaining portion 121 and the central axis X 2 of at least the portion of the second electric cable retaining portion 122 are both not parallel to the linear central axis X 0 of at least the portion of the body portion 110.
  • the central axis X 0 of at least the portion of the body portion 110, the central axis X 1 of at least the portion of the first electric cable retaining portion 121 and the central axis X 2 of at least the portion of the second electric cable retaining portion 122 are all linear and are not parallel to one another.
  • the central axis X 0 of at least the portion of the body portion 110, the central axis X 1 of at least the portion of the first electric cable retaining portion 121 and the central axis X 2 of at least the portion of the second electric cable retaining portion 122 are all curves.
  • the electric cable insertion direction is a direction in which the central axis X 0 of at least the portion of the body portion 110 is located.
  • the first electric cable retaining portion 121 is elastically flexible relative to the body portion 110. That is, at least the portion of the first electric cable retaining portion 121 (at least the portion being located between two reference planes which are perpendicular to the electric cable insertion direction and spaced apart from each other) as a whole deforms under the action of an external force to a deformed shape with a different degree of bending than an initial shape, and when the external force is removed, at least the portion can spontaneously return from the deformed shape to the initial shape.
  • the second electric cable retaining portion 122 is elastically flexible relative to the body portion 110. That is, at least the portion of the second electric cable retaining portion 122 (at least the portion being located between two reference planes which are perpendicular to the electric cable insertion direction and spaced apart from each other) as a whole deforms under the action of an external force to a deformed shape with a different degree of bending than an initial shape, and when the external force is removed, at least the portion can spontaneously return from the deformed shape to the initial shape.
  • the reference planes are virtual planes.
  • the initial shapes of at least the portion of the first electric cable retaining portion 121 and at least the portion of the second electric cable retaining portion 122 are both in the shape of a linear tube, while the deformed shapes of at least the portion of the first electric cable retaining portion 121 and at least the portion of the second electric cable retaining portion 122 are both in the shape of a curved tube.
  • embodiments of the present disclosure are not limited to this.
  • the initial shapes of at least the portion of the first electric cable retaining portion 121 and at least the portion of the second electric cable retaining portion 122 are both in the shape of a curved tube, while the deformed shapes of at least the portion of the first electric cable retaining portion 121 and at least the portion of the second electric cable retaining portion 122 are both in the shape of a linear tube.
  • the first electric cable retaining portion 121 as a whole deforms when it is subjected to an external force deviating from the direction of its central axis X 1 , such that the central axis X 1 can deform from the linear initial shape to an arc-shaped deformed shape, and when the external force disappears, its central axis X 1 can correspondingly deform from the arc-shaped deformed shape to the linear initial shape.
  • the second electric cable retaining portion 122 as a whole deforms when it is subjected to an external force deviating from the direction of its central axis X 2 , such that the central axis X 2 can deform from the linear initial shape to an arc-shaped deformed shape, and when the external force disappears, its central axis X 2 can correspondingly deform from the arc-shaped deformed shape to the linear initial shape.
  • the specific shapes of the initial shape and the deformed shape of the central axis X 1 and the central axis X 2 are not limited. Furthermore, it is to be understood that the central axis is not a solid structure, but merely a virtual axis used to describe the related shape.
  • first electric cable retaining portion 121 and the second electric cable retaining portion 122 each have a circular tubular shape.
  • embodiments of the present disclosure does not limit the specific shapes of the first electric cable retaining portion 121 and the second electric cable retaining portion 122.
  • any portion of any one of the body portion 110, the first electric cable retaining portion 121 and the second electric cable retaining portion 122 can have an asymmetrical shape, such that none of the body portion 110, the first electric cable retaining portion 121 and the second electric cable retaining portion 122 has a central axis.
  • the first embodiment of the present disclosure further provides a thermocouple sensor connection assembly 10, comprising: an electric cable connector 200, a first cable 310 and a second cable 320, and a strain relief sleeve 100.
  • the strain relief sleeve 100 can be engaged to the electric cable connector 200 by means of the body portion 110, and the first cable 310 and the second cable 320 respectively pass through the first electric cable retaining portion 121 and the second electric cable retaining portion 122 of the strain relief sleeve and are then connected to the electric cable connector 200.
  • the first cable 310 and the second cable 320 each comprise an insertion end and a free end opposite to each other.
  • a portion of the insertion end of the first cable 310 and a portion of the insertion end of the second cable 320 extend in the electric cable connector 200 along an electric cable insertion direction, and another portion of the insertion end of the first cable 310 and another portion of the insertion end of the second cable 320 are located outside the electric cable connector 200 and inside an internal space of the strain relief sleeve 100.
  • the free end (not shown) of the first cable 310 and the free end of the second cable 320 can be drawn towards any direction.
  • the portion of the insertion end of the first cable 310 and the portion of the insertion end of the second cable 320 extend in the electric cable connector 200 along the same electric cable insertion direction (for example, a vertical direction) .
  • the portion of the insertion end of the first cable 310 extends in the electric cable connector 200 along a first direction
  • the portion of the insertion end of the second cable 320 extends in the electric cable connector 200 along a second direction different from the first direction.
  • the first direction and the second direction are both linear directions.
  • the first direction is the electric cable insertion direction for the first cable 310
  • the second direction is the electric cable insertion direction for the second cable 320.
  • the first electric cable retaining portion 121 and the second electric cable retaining portion 122 are elastically flexible independently of each other. In this way, the first electric cable retaining portion 121 and the second electric cable retaining portion 122 can be prevented from interfering with each other during flexing.
  • the electric cable insertion direction is the vertical direction
  • the first cable 310 is drawn and dragged towards a horizontal leftward direction
  • the second cable 320 is drawn and dragged towards a horizontal rightward direction.
  • the first cable 310 drives the first electric cable retaining portion 121 to bend and deform towards the horizontal leftward direction
  • the second cable 320 drives the second electric cable retaining portion 122 to bend and deform towards the horizontal rightward direction.
  • first electric cable retaining portion 121 In the process of bending and deformation, stress is generated inside the first electric cable retaining portion 121 to resist the leftward bending and deformation.
  • the stress generated inside the first electric cable retaining portion 121 is sufficient to reduce the degree to which the insertion end of the first cable 310 is bent to a certain extent, so as to at least partially relieve a pulling stress in the insertion end of the first cable 310, thereby protecting the insertion end of the first cable 310 from being damaged in the process of the first cable 310 being drawn and dragged towards the horizontal leftward direction.
  • the stress generated inside the second electric cable retaining portion 122 is sufficient to reduce the degree to which the insertion end of the second cable 320 is bent to a certain extent, so as to at least partially relieve the pulling stress in the insertion end of the second cable 320, thereby protecting the insertion end of the second cable 320 from being damaged in the process of the second cable 320 being drawn and dragged towards the horizontal rightward direction.
  • the end of each of the first electric cable retaining portion 121 and the second electric cable retaining portion 122 close to the body portion 110 is a gradually enlarged flared end.
  • a larger accommodating space can be provided for the insertion ends of the first cable 310 and the second cable 320, so as to prevent the ends of the first electric cable retaining portion 121 and the second electric cable retaining portion 122 from adversely interfering with the ends of the first cable 310 and the second cable 320 near the second end of the body portion 110.
  • the flared end of the first electric cable retaining portion 121 and the flared end of the second electric cable retaining portion 122 are integrally connected on the side close to each other.
  • the strain relief sleeve 100 in the above embodiments comprises two electric cable retaining portions, namely the first electric cable retaining portion 121 and the second electric cable retaining portion 122, it is to be understood that the embodiments of the present disclosure does not limit the number of the electric cable retaining portions comprised by the strain relief sleeve 100.
  • one of the first electric cable retaining portion 121 and the second electric cable retaining portion 122 can be omitted, so that the strain relief sleeve 100 only comprises the other one of the first electric cable retaining portion 121 and the second electric cable retaining portion 122.
  • the strain relief sleeve 100 can further comprise a third electric cable retaining portion (not shown) , and the first electric cable retaining portion 121, the second electric cable retaining portion 122 and the third electric cable retaining portion can be arranged at equal intervals in a circumferential direction.
  • the strain relief sleeve 100 provided in the first embodiment of the present disclosure is a housing having a predetermined thickness.
  • the predetermined thickness is in the range of 1 mm to 2 mm.
  • a first housing thickness of the strain relief sleeve 100 at the first electric cable retaining portion 121 and the second electric cable retaining portion 122 is the respective wall thickness of the first electric cable retaining portion 121 and the second electric cable retaining portion 122; and a second housing thickness of the strain relief sleeve 100 at the body portion 110 is the wall thickness of the body portion 110.
  • the first housing thickness is less than the second housing thickness.
  • the materials of the first electric cable retaining portion 121, the second electric cable retaining portion 122 and the body portion 110 of the strain relief sleeve 100 are all elastomeric materials.
  • the material of the first electric cable retaining portion 121, the second electric cable retaining portion 122 and the body portion 110 of the strain relief sleeve 100 is, for example, at least one of silicone rubber, polyurethane, and fluororubber.
  • these materials can provide the required elasticity and support for the strain relief sleeve 100, and on the other hand, the strain relief sleeve 100 thus has the advantages of high temperature resistance, oil resistance, vibration resistance and friction resistance.
  • the materials of the first electric cable retaining portion 121, the second electric cable retaining portion 122 and the body portion 110 of the strain relief sleeve 100 are silicone rubber, it can maintain a stable performance at an ambient temperature of 150°C to 260°C.
  • the ambient temperature around an engine is high and there are many corrosive gases and liquids.
  • the strain relief sleeve 100 made of silicone rubber is suitable for use as a strain relief sleeve for cables around an engine due to its excellent temperature resistance, oil resistance, vibration resistance and friction resistance.
  • Shore A hardness values of the first electric cable retaining portion 121, the second electric cable retaining portion 122 and the body portion 110 of the strain relief sleeve 100 range from 60 to 80. In this way, the strain relief sleeve 100 can provide excellent support and protection for the insertion ends of the first cable 310 and the second cable 320.
  • the elongation of fracture of the first electric cable retaining portion 121, the second electric cable retaining portion 122 and the body portion 110 of the strain relief sleeve 100 ranges from 110%to 340%. In this way, the strain relief sleeve 100 itself is less prone to damage.
  • the first electric cable retaining portion 121, the second electric cable retaining portion 122 and the body portion 110 of the strain relief sleeve 100 are integrally formed by an injection molding process. In this way, the strain relief sleeve 100 has a simple manufacturing process and is easy to mass-produce.
  • organo-silicon compound rubber can be used as raw rubber, and is formed by heating and vulcanization after a vulcanizing agent is added (the vulcanizing agent can be selected according to the needs of the process) .
  • a vulcanizing agent can be selected according to the needs of the process.
  • an integrally formed strain relief sleeve 100 is produced by adding 2, 5-dimethyl 2, 5-tert-butylhexane diperoxide to the raw rubber, then vulcanizing at 170°C for 10 minutes, and then vulcanizing at 200°C for 4 hours.
  • the related physical parameter data of the first electric cable retaining portion 121, the second electric cable retaining portion 122 and the body portion 110 of the strain relief sleeve at different days after molding are shown in the following table.
  • the body portion 110 comprises a snap-fitting structure 111 at the opening P that is engaged with the electric cable connector 200.
  • the strain relief sleeve 100 is engaged to the electric cable connector 200 by means of the body portion 110, the end of the electric cable connector 200 is located in the internal space of the body portion 110.
  • the end of the electric cable connector 200 is provided with a reinforcing rib 201 protruding towards the body portion 110 of the strain relief sleeve 100.
  • the snap-fitting structure 111 and the reinforcing rib 201 are sized to match and shaped to complement each other, such that the snap-fitting structure 111 and the reinforcing rib 201 can be snapped together to snap the strain relief sleeve 100 on the end of the electric cable connector 200.
  • the body portion 110 of the strain relief sleeve 100 is made of an elastomeric material. In this way, it is only necessary to properly stretch the body portion 110 over the reinforcing rib 201 on the end of the electric cable connector 200 and then release the body portion 110 such that the snap-fitting structure 111 and the reinforcing rib 201 are naturally snapped together to complete mounting of the electric cable connector 200 and the strain relief sleeve 100.
  • the reinforcing rib 201 only occupies half a turn (namely the reinforcing rib 201 can have a C-shaped profile) . In this way, the problem that the electric cable connector 200 cannot be core-pulled due to the whole turn of the reinforcing rib can be solved.
  • the snap-fitting structure 111 is a depression on an inner wall of the body portion 110 that at least partially extends annularly.
  • the snap-fitting structure 111 is a C-shaped depression on the inner wall of the body portion 110 that partially extends annularly.
  • the snap-fitting structure 111 is a complete annular depression on the inner wall of the body portion 110 that extends annularly for a whole turn.
  • the snap-fitting structure 111 and the reinforcing rib 201 can be snapped together without intentionally aligning the snap-fitting structure 111 and the reinforcing rib 201.
  • the first cable 310 comprises two wires 311 and an insulating sheath 312 covering outer surfaces of the two wires 311.
  • Each wire 311 itself has an insulated outer surface.
  • the second cable 320 comprises two wires 321 and an insulating sheath 322 covering outer surfaces of the two wires 321.
  • Each wire 321 itself has an insulated outer surface. It is to be understood that the embodiments of the present disclosure do not limit the number of wires comprised in each of the first cable 310 and the second cable 320. The end of each wire is engaged in the electric cable connector 200, for example, in a stationary positional relationship.
  • the minimum inner diameter of the first electric cable retaining portion 121 is larger than the maximum outer diameter of the first cable 310; and the minimum inner diameter of the second electric cable retaining portion 122 is larger than the maximum outer diameter of the second cable 320.
  • the first cable 310 can not contact the inner wall (i.e. an inner surface) of the first electric cable retaining portion 121, and the second cable 320 can not contact the inner wall of the second electric cable retaining portion 122.
  • embodiments of the present disclosure are not limited to this.
  • the minimum inner diameter of the first electric cable retaining portion 121 can be substantially equal to the maximum outer diameter of the first cable 310; and the minimum inner diameter of the second electric cable retaining portion 122 can be substantially equal to the maximum outer diameter of the second cable 310. In this way, the first cable 310 contacts the inner wall of the first electric cable retaining portion 121, and the second cable 320 contacts the inner wall of the second electric cable retaining portion 122.
  • the minimum inner diameter of the first electric cable retaining portion 121 can be substantially equal to the maximum outer diameter of the first cable 310; and the minimum inner diameter of the second electric cable retaining portion 122 can be larger than the maximum outer diameter of the second cable 310. In this way, the first cable 310 contacts the inner wall of the first electric cable retaining portion 121, and the second cable 320 contacts the inner wall of the second electric cable retaining portion 122.
  • FIG. 4A and FIG. 4B are three-dimensional schematic structural diagrams from different perspectives of a strain relief sleeve for an electric cable connector provided in a second embodiment of the present disclosure.
  • FIG. 5 is a schematic sectional structural diagram of a thermocouple sensor connection assembly provided in a second embodiment of the present disclosure.
  • strain relief sleeve 100’ for an electric cable connector and a thermocouple sensor connection assembly 10’ provided in a second embodiment of the present disclosure are described with reference to FIG. 4A to FIG. 5.
  • the strain relief sleeve 100’ has substantially the same construction and material as the strain relief sleeve 100.
  • the same or similar reference numerals denote the same or similar parts, so the repeated description is omitted here and only the differences are explained.
  • the main differences of the strain relief sleeve 100’ and the strain relief sleeve 100 are: a snap-fitting structure of a body portion 110’ of the strain relief sleeve 100’ at an opening P is a plurality of depressions 112 discretely distributed on an inner wall of the body portion 110’.
  • the outline of the strain relief sleeve 100’ where its body portion 110’ meets two electric cable retaining portions 121’ and 122’ is different from the outline of the strain relief sleeve 100 at the corresponding locations.
  • a plurality of discretely distributed projections 202 are provided on the end of an electric cable connector 200' of the thermocouple sensor connection assembly 10'.
  • the plurality of projections 202 and the plurality of depressions 112 are in one-to-one correspondence.
  • the projection 202 and the depression 112 corresponding to each other have the matching size and the same shape, such that the projection 202 can be nested in the corresponding depression 112 so as to snap the strain relief sleeve 100’ to the end of the electric cable connector 200’.
  • each depression 112 is a through hole having a T-shaped profile, and each projection 202 correspondingly has a T-shaped profile. In this way, the projection 202 can be nested in the corresponding depression 112 more stably, so that the strain relief sleeve 100’ can be snapped to the end of the electric cable connector 200’ more stably.
  • the inner wall of the body portion 110’ is composed of a first sub-inner wall, a second sub-inner wall, a third sub-inner wall and a fourth sub-inner wall.
  • the first sub-inner wall and the second sub-inner wall face each other and are spaced apart from each other
  • the third sub-inner wall and the fourth sub-inner wall face each other and are spaced apart from each other
  • the first sub-inner wall and the second sub-inner wall are each connected to the third sub-inner wall and the fourth sub-inner wall
  • the third sub-inner wall and the fourth sub-inner wall are each connected to the first sub-inner wall and the second sub-inner wall.
  • Three through holes 112 are respectively located on the first sub-inner wall, the third sub-inner wall and the fourth sub-inner wall, and the second sub-inner wall is not provided with any depression structure.
  • Three projections 202 and the three through holes 112 are arranged on the end of the electric cable connector 200’ in one-to-one correspondence, and in this way, the problem that the electric cable connector 200’ cannot be core-pulled can be solved.
  • each depression 112 can not penetrate the body portion 110'.
  • the profile of each depression 112 can be the same or different.
  • the number of the depressions 112 can also not limited to three.
  • the plurality of depressions 112 can be distributed only on the first sub-inner wall, the third sub-inner wall and the fourth sub-inner wall.
  • the outline profile of the strain relief sleeve 100 where its body portion 110 meets the two electric cable retaining portions 121 and 122 has a radially outwardly convex shape.
  • the radial direction refers to a direction perpendicular to a neutral axis X 0 of the body portion.
  • the outline profile of the strain relief sleeve 100' where its body portion 110' meets the two electric cable retaining portions 121' and 122' does not have the convex shape of the strain relief sleeve 100 at the corresponding location.
  • an outer surface of the strain relief sleeve 100' where its body portion 110' meets the two electric cable retaining portions 121' and 122' can be partially cylindrical.
  • the strain relief sleeve 100 and 100’ provided in the embodiments of the present disclosure can be used with a multi-wire electric cable connector of a VALEO TG1100 (adigital thermocouple sensor) .
  • the sensor is an exhaust gas temperature sensor (EGTS) with thermocouple technology and has a digital output. This sensor is designed to measure the maximum gas temperature in exhaust systems of various internal combustion engines.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Details Of Connecting Devices For Male And Female Coupling (AREA)
PCT/CN2022/117777 2021-09-10 2022-09-08 Strain relief sleeve and thermocouple sensor connection assembly WO2023036231A1 (en)

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CN202111060206.X 2021-09-10
CN202111060206.XA CN114221169A (zh) 2021-09-10 2021-09-10 应力消除套筒和热电偶传感器连接组件

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