Lead-in cable and manufacturing method therefor, electrical apparatus, motor and electric vehicle

Abstract

The present invention relates to the field of electrical engineering, in particular to a lead-in cable and a manufacturing method therefor, an electrical apparatus, a motor and an electric vehicle. The lead-in cable is installed on the electrical apparatus and at least comprises: a wire harness, at least comprising a plurality of electric wires consisting of a plurality of power supply wires connected to an external power supply; an isolation sealing sleeve, which is sleeved on the wire harness and is provided with a plurality of wire holes used for containing and isolating the electric wires; a protective sealing sleeve, which is provided on the side close to the electrical apparatus and is provided with a coating portion that is sleeved on the outer side of the isolation sealing sleeve and an extending portion that extends from the coating portion to the direction away from the electrical apparatus; and a fastener, which is in a fastened connection to the electrical apparatus, a step portion being provided between the coating portion and the extending portion, and the fastener abutting against the step portion, such that the coating portion of the protective sealing sleeve is in an interference fit with the electrical apparatus, thereby preventing accumulated water from entering the electrical apparatus through a gap at the joint between the lead-in cable and the electrical apparatus.

Description

Lead-in cable, manufacturing method thereof, electric device, motor and electric vehicle TECHNICAL FIELD

[0001] The present application relates to the field of electrical engineering, in particular to a lead-in cable, a manufacturing method thereof, an electric device, a motor and an electric vehicle. BACKGROUND

[0002] Cables are applied in various fields of electrical engineering. For example, a lead-in cable is usually provided in an electric device, which is directly installed at a mounting hole of a housing for connecting an external power supply.

[0003] In an electric device in a water environment, such as an underwater searchlight, a water turbine or a motor, the waterproof performance of the lead-in cable directly affects the safety performance and service life of the electric device. In the prior art, the installation part of the lead-in cable of such an electric device is usually sealed by glue, but after thermal expansion and cold contraction, a gap is easily formed between the glue and the cable, and water can enter the interior of the electric device through the gap of the cable, which can cause the risk of water leakage and result in short circuit and scrapping of the electric device. SUMMARY

[0004] The present application is made to solve the above problems, and aims to provide a lead-in cable, a manufacturing method thereof, an electric device, a motor and an electric vehicle, which can effectively improve the waterproof performance of the lead-in cable.

[0005] The present application provides a lead-in cable installed on an electric device, having the following features: at least comprising a wire harness comprising a plurality of power supply wires connected to an external power supply; an isolation sealing sleeve sleeved on the wire harness and provided with a plurality of wire holes for isolating and accommodating the power supply wires; a protection sealing sleeve provided on a side close to the electric device and having a covering portion sleeved on the outside of the isolation sealing sleeve and an extension portion extending away from the electric device from the covering portion; and a fastener for fastening connection with the electric device, wherein a step portion is provided between the covering portion and the extension portion, and the fastener abuts against the step portion, so that the covering portion of the protection sealing sleeve is in interference fit with the electric device.

[0006] In the lead-in cable provided by the present application, the isolation sealing sleeve and the protection sealing sleeve are both made of rubber material, and the protection sealing sleeve is formed on the outside of the isolation sealing sleeve by vulcanization.

[0007] In the lead-in cable provided by the present application, the connection part of the electric device is provided with a connection hole through which the wire harness is connected to the power supply wires inside the electric device, the end of the covering portion close to the electric device is provided with a first inclined surface with a gradually reduced outer diameter, the connection hole is provided with a second inclined surface with a gradually reduced inner diameter, the inclination angles of the first inclined surface and the second inclined surface are adapted, and the first inclined surface and the second inclined surface abut against each other when the lead-in cable is installed on the electric device.

[0008] In the lead-in cable provided by the application, the gasket is further arranged between the fastener and the stepped portion, and one side of the gasket abuts against the fastener and the other side abuts against the stepped end face of the stepped portion, wherein the fastener is a nut, the nut is threadedly connected with the connecting hole, and the gasket is pushed to press the first inclined surface against the second inclined surface by rotating the nut.

[0009] In the lead-in cable provided by the application, the wire hole further comprises a data wire hole and a power supply wire hole, and a plurality of power supply wire holes are distributed on the outer peripheral side of the data wire hole.

[0010] In the lead-in cable provided by the application, the gasket is further arranged between the fastener and the stepped portion, and one side of the gasket abuts against the fastener and the other side abuts against the stepped end face of the stepped portion, wherein the fastener is a nut, the nut is threadedly connected with the connecting hole, and the gasket is pushed to press the first inclined surface against the second inclined surface by rotating the nut.

[0011] The application provides a manufacturing method of a lead-in cable, which is used for manufacturing the lead-in cable, and has the following characteristics.

[0012] S1, preparing a wire harness, an isolation sealing sleeve, a locking sleeve, a gasket and a fastener;

[0013] S2, sleeving the fastener and the gasket on the wire harness;

[0014] S3, peeling off the outer sheath of one end of the wire harness to expose a plurality of electric wires in the wire harness;

[0015] S4, respectively threading the plurality of electric wires into corresponding wire holes of the isolation sealing sleeve,

[0016] S5, sleeving the locking sleeve on the isolation sealing sleeve, and inwardly extruding the locking sleeve by using an extrusion tool, so that the wire holes of the isolation sealing sleeve are shrunk and deformed, and then each electric wire is extruded and sealed;

[0017] S6, applying a layer of adhesive on the outer layer of the isolation sealing sleeve and the locking sleeve;

[0018] S7, wrapping a protective sealing sleeve on the outer layer of the isolation sealing sleeve and the locking sleeve by a vulcanization process, and forming a cladding portion, an extension portion and a stepped portion on the outer ring side of the protective sealing sleeve;

[0019] S8, sleeving the gasket and the fastener on the outer ring side of the protective sealing sleeve to form the lead-in cable.

[0020] The application provides an electric device, which has the following characteristics: the lead-in cable is installed, and the lead-in cable is the above-mentioned lead-in cable.

[0021] The application provides an electric machine, which has the following characteristics: the lead-in cable is installed, and the lead-in cable is the above-mentioned lead-in cable.

[0022] The application provides an electric vehicle, which has the characteristics of comprising the motor.

[0023] Effects of the application

[0024] According to the lead-in cable, the electric device, the motor and the electric vehicle, the electric wires are isolated and sealed from each other by the deformed locking sleeve extruding the isolation sealing sleeve, the waterproof performance between the electric wires in the wire harness is achieved, and the wire harness is waterproof.

[0025] The fastener is used for fastening connection with the electric device and abutting against the stepped portion, so that the cladding portion of the protection sealing sleeve is extruded to the second inclined surface through the first inclined surface to achieve interference fit, the waterproof sealing between the lead-in cable and the electric device is achieved, external water is prevented from entering the electric device through the connection gap between the lead-in cable and the electric device, and the waterproof performance of the lead-in cable and the electric device is further improved.

[0026] The isolation sealing sleeve and the protection sealing sleeve are made of rubber material, so that the isolation sealing sleeve and the protection sealing sleeve have certain elasticity, the sealing performance of the isolation sealing sleeve after being extruded by the locking sleeve is more firm, and the sealing performance of the protection sealing sleeve after being extruded between the connection hole is more firm; further, the isolation sealing sleeve and the protection sealing sleeve are both made of rubber material, the protection sealing sleeve is formed outside the isolation sealing sleeve and the wire harness through vulcanization, the tightness of the protection sealing sleeve and the isolation sealing sleeve and the wire harness can be improved, and the waterproof performance is better.

[0027] The gasket is arranged, relative cutting motion between the fastener and the protection sealing sleeve during rotation of the fastener is avoided, and the fastener is prevented from being easily damaged; after the gasket is arranged, only extrusion force exists between the gasket and the protection sealing sleeve, and no cutting force exists.

[0028] Each electric wire in the wire harness is separated through the isolation sealing sleeve, each electric wire is extruded and locked through the locking sleeve, the protection sealing sleeve is formed outside the wire harness, the isolation sealing sleeve and the locking sleeve through vulcanization, and the protection sealing sleeve is extruded by the fastener to realize interference fit between the protection sealing sleeve and the connection hole, so that the sealing connection between the electric wires, the electric wires and the outer skin and the protection sealing sleeve and the connection hole is perfectly achieved, and the waterproof performance of the lead-in cable and the electric device is improved. BRIEF DESCRIPTION OF DRAWINGS

[0029] FIG. 1 is a structural schematic view of the lead-in cable installed on the motor in the embodiment of the application;

[0030] FIG. 2 is a structural schematic view of the lead-in cable in the embodiment of the application;

[0031] Fig. 3 is an exploded view of the lead-in cable in an embodiment of the present application;

[0032] Fig. 4 is a partial cross-sectional view of the lead-in cable in an embodiment of the present application;

[0033] Fig. 5 is another cross-sectional view of the lead-in cable in an embodiment of the present application; and

[0034] Fig. 6 is a flow chart of the manufacturing process of the lead-in cable in an embodiment of the present application.

[0035] BRIEF DESCRIPTION OF DRAWINGS 100 - lead-in cable; 200 - stator; 201 - connecting hole; 202 - wire hole; 203 - second inclined surface; 1 - isolation sealing sleeve; 2 - locking sleeve; 3 - protection sealing sleeve; 4 - fastener; 5 - gasket; 20 - wire harness; 21 - power supply wire; 22 - data line; 23 - outer skin; 11 - wire hole; 111 - power supply wire hole; 112 - data line hole; 31 - covering portion; 32 - extension portion; 33 - stepped portion; 311 - first inclined surface. DETAILED DESCRIPTION

[0036] In order to make the technical means, creative features, purposes and effects of the present application easy to understand, the technical solutions of the present application are specifically described below in conjunction with the drawings.

[0037] <EMBODIMENT>

[0038] The lead-in cable 100 is installed on an electric device, which can be an electric motor or other electric appliances, such as underwater searchlights and water turbines, etc. In this embodiment, the hub motor in an electric vehicle is taken as an example.

[0039] Referring to Fig. 1, the lead-in cable 100 is installed on the stator 200 of the hub motor, and the stator 200 is provided with a connecting hole 201 and a wire hole 202 in communication.

[0040] The connecting hole 201 is located on the side close to the outside of the motor and communicates with the outside of the motor, and the wire hole 202 is located on the side close to the inside of the motor and communicates with the inside of the motor, and the inner diameter of the wire hole 202 is smaller than that of the connecting hole 201.

[0041] The second inclined surface 203 with gradually decreasing inner diameter is provided on the end of the connecting hole 201 close to the wire hole 202, and the side wall of the connecting hole 201 is provided with internal threads.

[0042] Referring to Figs. 2 and 3, the lead-in cable 100 includes a wire harness 20, an isolation sealing sleeve 1, a locking sleeve 2, a protection sealing sleeve 3, a fastener 4 and a gasket 5.

[0043] The wire harness 20 contains a plurality of electric wires, including power supply wires 21 connected to an external power source and data wires 22, wherein the plurality of power supply wires 21 are distributed on the outer peripheral side of the data wires 22. The wire harness 20 passes through the connection hole 201 and the wire hole 202, and the power supply wires 21 and the data wires 22 are connected to the electric wires and the data wires inside the electrical device, respectively.

[0044] Referring to FIGS. 4 and 5, the isolation sleeve 1 is sleeved on the wire harness 20, and the isolation sleeve 1 is provided with a plurality of wire holes 11, including power supply wire holes 111 and data wire holes 112, wherein the plurality of power supply wire holes 111 are distributed on the outer peripheral side of the data wire holes 112. The power supply wires 21 in the wire harness 20 pass through the power supply wire holes 111, and the data wires 22 pass through the data wire holes 112, so that each electric wire is accommodated through the wire hole 11 and is isolated.

[0045] In the embodiment, each wire hole accommodates one electric wire, thereby playing a role of isolating each electric wire; in addition, two to three electric wires without isolation requirements can also be accommodated in the same wire hole.

[0046] The locking sleeve 2 is sleeved on the outside of the isolation sleeve 1, used to extrude the isolation sleeve 1, so that each wire hole 11 extrudes and seals the power supply wires 21 and the data wires 22 in the wire hole 11. In the embodiment, the locking sleeve 2 is a metal sleeve, and the locking sleeve 2 is extruded to make the isolation sleeve 1 deform inward, thereby making the wire hole 11 shrink and extrude the electric wires in the wire harness 20.

[0047] Referring to FIGS. 3, 4 and 5, the protection sleeve 3 is arranged on the side close to the electrical device, and has a cladding portion 31 sleeved on the outside of the isolation sleeve 1 and an extension portion 32 extending away from the electrical device from the cladding portion 31, and a stepped portion 33 is arranged between the cladding portion 31 and the extension portion 32.

[0048] The extension portion 32 wraps part of the exposed electric wires and part of the outer skin 23, thereby making the protection sleeve 3 completely wrap the transition part of the exposed electric wires and the outer skin 23.

[0049] The cladding portion 31 is provided with a first inclined surface 311 with a gradually reduced outer diameter at the end close to the motor, and the inclination angle of the first inclined surface 311 is adapted to the inclination angle of the second inclined surface 203. The fastener 4 is preferably a nut, and the nut is threadedly connected to the connection hole. The first inclined surface 311 is pressed against the second inclined surface 203 by rotating the nut.

[0050] Further, the fastener 4 abuts against the stepped portion 33, and a gasket 5 is arranged between the fastener 4 and the stepped portion 33. The gasket 5 is abutted and extruded against the stepped end face of the stepped portion 33 by screwing the fastener 4, so that the first inclined surface 311 on the cladding portion 31 extrudes the second inclined surface 203, and the protection sleeve 3 is achieved to be in interference fit with the connection hole 201 in the stator 200.

[0051] Further, the isolation sealing sleeve 1 is made of rubber material, and the protection sealing sleeve 3 is made of rubber material; so that the isolation sealing sleeve 1 and the protection sealing sleeve 3 have certain elasticity, and the protection sealing sleeve 3 is formed on the outer side of the isolation sealing sleeve 1, the locking sleeve 2 and part of the wire harness 20 by vulcanization.

[0052] Referring to FIG. 6, the manufacturing method of the lead-in cable 100 includes the following steps:

[0053] S1, preparing the wire harness 20, the isolation sealing sleeve 1, the locking sleeve 2, the fastener 4 and the gasket 5;

[0054] S2, sleeving the fastener 4 and the gasket 5 on the wire harness 20;

[0055] S3, peeling off the outer skin 23 of the wire harness 20 close to the electric device to expose the plurality of power supply wires 21 and data lines 22 in the wire harness 20;

[0056] S4, respectively threading the plurality of power supply wires 21 and data lines 22 into the corresponding wire holes 11 on the isolation sealing sleeve 1,

[0057] S5, sleeving the locking sleeve 2 on the isolation sealing sleeve 1, and inwardly extruding the locking sleeve 2 with an extrusion tool to deform and shrink the wire holes 11 on the isolation sealing sleeve 1, and further extrude and seal the plurality of power supply wires 21 and data lines 22;

[0058] S6, smearing a layer of adhesive on the outer layer of the isolation sealing sleeve 1 and the locking sleeve 2;

[0059] S7, wrapping a layer of protection sealing sleeve 3 on the outer layer of the isolation sealing sleeve 1 and the locking sleeve 2 by vulcanization process, and forming the covering part 31, the extension part 32 and the step part 33 on the outer ring side of the protection sealing sleeve 3;

[0060] S8, sleeving the gasket 5 and the fastener 4 on the outer ring side of the protection sealing sleeve 3 to form the lead-in cable.

[0061] In the above step S5, when the locking sleeve 2 is extruded, it is extruded inwardly in eight directions by the extrusion tool, so that the circular locking sleeve 2 is deformed into an octagonal shape, and the deformation of the locking sleeve 2 isolates and seals the electric wires in the wire harness from each other.

[0062] Specifically, the protection sealing sleeve 3 is made of rubber material, such as NBR or FKM or EPDM material; the locking sleeve 2 is a metal ring, such as an aluminum ring; the gasket 5 is made of copper or stainless steel; and the fastener 4 is made of copper or stainless steel.

[0063] Effects of the embodiment

[0064] The outer skin 23 is generally made of high-temperature-resistant fluororubber material. The fluororubber and other rubber materials have the characteristic of not being bonded, for example, the outer skin 23 and the wire skin, and further, the gap between the outer skin 23 and the wire skin has the risk of water seepage. The deformation of the locking sleeve 2 isolates and seals each wire in the wire harness, realizes the waterproof performance between each wire in the wire harness, and realizes the water-tightness inside the wire harness 20. Further, the risk of water seepage caused by the characteristic of the fluororubber and other rubber materials not being bonded is avoided.

[0065] The protective sealing sleeve 3 is wrapped outside the isolation sealing sleeve 1 and the locking sleeve 2 by vulcanization, and the covering part 31 and the extension part 32 are formed on the protective sealing sleeve 3, which wraps the transition part between the exposed wire and the outer skin 23, realizes and enhances the sealing performance between the outer skin 23 and the exposed wire, and avoids water from the outside of the wire harness from seeping into the inside of the wire harness.

[0066] The fastener 4 is fastened and connected with the electrical device, and abuts against the step part 33, so that the covering part 31 of the protective sealing sleeve 3 and the electrical device are extruded by the first inclined surface 311 and the second inclined surface 203. The interference fit realizes the waterproof sealing between the lead-in cable and the electrical device, avoids external water from entering the electrical device through the connection gap between the lead-in cable and the electrical device, and further improves the waterproof performance of the lead-in cable and the waterproof performance of the electrical device.

[0067] The isolation sealing sleeve 1 and the protective sealing sleeve 3 are made of rubber material, so that the isolation sealing sleeve 1 and the protective sealing sleeve 3 have a certain elasticity, so that the sealing performance of the isolation sealing sleeve 1 after being extruded by the locking sleeve 2 is more firm, and the sealing performance of the protective sealing sleeve 3 after being extruded between the connecting hole 201 is more firm. Further, the isolation sealing sleeve 1 and the protective sealing sleeve 3 are both made of rubber material, and the protective sealing sleeve 3 is formed outside the isolation sealing sleeve 1 and the wire harness 20 by vulcanization, which can improve the tightness of the protective sealing sleeve 3 combined with the isolation sealing sleeve 1 and the wire harness 20, and the waterproof performance is better.

[0068] The gasket 5 is provided, and when the fastener 4 is screwed, the relative cutting motion between the fastener 4 and the protective sealing sleeve 3 is avoided, and further the fastener is avoided from being damaged. After the gasket 5 is provided, only extrusion force exists between the gasket and the fastener without cutting force. The gasket 5 and the fastener 4 are both made of metal, and when they are rotated and extruded, no damage will occur between the gasket 5 and the fastener 4.

[0069] Each wire in the wire harness 20 is separated by the isolation sleeve 1, each wire is extruded and compressed by the locking sleeve 2, the protective sleeve 3 is formed outside the wire harness 20, the isolation sleeve 1 and the locking sleeve 2 by vulcanization, and the protective sleeve 3 is in interference fit with the connecting hole 201 by extruding the protective sleeve 3 by the fastener 4 to realize the sealing of the protective sleeve 3 and the connecting hole 201, which perfectly realizes the sealed connection between each bare wire, the wire and the outer skin, and the protective sleeve 3 and the connecting hole 201, and further improves the waterproof performance of the lead-in cable and the waterproof performance of the electrical device.

[0070] Through experiments, the lead-in cable of the embodiment can realize water leakage prevention at a water depth of 1.5 meters to 30 meters, so that, for example, the hub motor on the electric vehicle avoids water from entering the motor, and further improves the service life and safety performance of the motor and the whole vehicle.

[0071] The above embodiments are only used to illustrate the specific embodiments of the present application, and those skilled in the art should understand that the present application is not limited by the above embodiments, and the above embodiments and the description in the specification are only to illustrate the principles of the present application, and various changes and improvements can be made without departing from the spirit and scope of the present application, and these changes and improvements all fall within the scope of the claimed present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. A patch cord for installation on an electrical device, characterized in that, At least comprising: a wire harness, at least containing a plurality of electric wires composed of a plurality of power supply wires connected to an external power supply; an isolation sleeve, sleeved on the wire harness, and provided with a plurality of wire holes for isolating and accommodating the electric wires; a protection sleeve, provided on a side close to the electric device, and having a cladding portion sleeved on an outer side of the isolation sleeve and an extension portion extending from the cladding portion away from the electric device; and a fastener for fastening connection with the electric device, wherein a step portion is provided between the cladding portion and the extension portion, and the fastener abuts against the step portion, so that the cladding portion of the protection sleeve is in interference fit with the electric device.

2. The lead-in cable according to claim 1, characterized in that: the isolation sleeve and the protection sleeve are both made of rubber material, and the protection sleeve is formed on the outer side of the isolation sleeve by vulcanization. wherein 3. The lead-in cable according to claim 1 or 2, characterized in that: a connection hole is provided at a connection portion of the electric device, and the wire harness passes through the connection hole to be connected with electric wires inside the electric device; wherein, an end of the cladding portion close to the electric device is provided with a first inclined surface with a gradually reduced outer diameter, the connection hole is provided with a second inclined surface with a gradually reduced inner diameter, and the inclined angles of the first inclined surface and the second inclined surface are adapted, and when the lead-in cable is installed on the electric device, the first inclined surface abuts against the second inclined surface.

4. The lead-in cable according to claim 3, characterized in that: a gasket is further installed between the fastener and the step portion, and one side of the gasket abuts against the fastener and the other side abuts against a step end surface on the step portion, wherein the fastener is a nut, the nut is threadedly connected with the connection hole, and the gasket is pushed to press the first inclined surface against the second inclined surface by rotating the nut.

5. The lead-in cable according to claim 1, characterized in that: the wire hole further comprises a data wire hole and a power supply wire hole, and a plurality of the power supply wire holes are distributed on the outer peripheral side of the data wire hole.

6. The lead-in cable according to claim 1, characterized in that: a locking sleeve is further sleeved on the outer side of the isolation sleeve, and is used to extrude the isolation sleeve to make each wire hole shrink and extrude the electric wire in the wire hole. A method for manufacturing the lead-in cable according to any one of claims 1-7, comprising the following steps:

7. A method of manufacturing a patch cord, characterized by: S1, preparing a wire harness, an isolation sleeve, a locking sleeve, a gasket and a fastener; S2, sleeving the fastener and the gasket on the wire harness; S3, peeling off the outer skin of one end of the wire harness to expose a plurality of electric wires in the wire harness; S4, passing the plurality of electric wires into corresponding wire holes on the isolation sleeve respectively, S5, sleeving the locking sleeve on the isolation sleeve, and extruding the locking sleeve inwardly by using an extruding tool to make the wire holes on the isolation sleeve shrink and deform, and then extrude and seal each electric wire; S6, applying a layer of adhesive on the outer layer of the isolation sleeve and the locking sleeve. ​ S7, wrapping a protective sealing sleeve on the outer layer of the isolation sealing sleeve and the locking sleeve through a vulcanization process, and forming a covering portion, an extension portion and a step portion on the outer ring side of the protective sealing sleeve; S8, sleeving a gasket and a fastener on the outer ring side of the protective sealing sleeve to form a lead cable.

8. An electrical device, characterized by: The lead cable is installed, and the lead cable is the lead cable according to any one of claims 1-6.

9. An electric machine characterized by: The lead cable is installed, and the lead cable is the lead cable according to any one of claims 1-6.

10. An electric vehicle, characterized by: The motor comprises the motor according to claim 9. The motor comprises the motor according to claim 9.

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