Leading cable, power utilization device, motor and electric vehicle

Abstract

The utility model relates to the field of electrical engineering, in particular to a leading cable, an electric device, a motor and an electric vehicle. The leading cable is installed on an electric device and at least comprises a wire harness which at least comprises a plurality of electric wires formed by a plurality of power supply wires connected with an external power supply; the isolation sealing sleeve is sleeved on the wire harness and is provided with a plurality of wire holes for isolating and accommodating electric wires; the protection sealing sleeve is arranged on one side close to the power utilization device and is provided with a coating part which sleeves the outer side of the isolation sealing sleeve and an extension part which extends from the coating part to the direction far away from the power utilization device; a step part is arranged between the wrapping part and the extension part, and the fastener abuts against the step part, so that the wrapping part of the protection sealing sleeve is in interference fit with the power utilization device, and accumulated water is prevented from entering the power utilization device through a connection gap between the leading cable and the power utilization device.

Description

Technical Field

[0001] The utility model relates to the field of electrical engineering, in particular to a lead-in cable and an electrical device, a motor and an electric vehicle. Background Art

[0002] Cables are used in various electrical engineering fields. For example, a power-consuming device is usually provided with a lead-in cable, which is directly installed at a mounting hole of a housing to connect to an external power source.

[0003] In electrical devices that are used in water environments, such as underwater searchlights, turbines, and motors, the waterproof performance of the lead cable directly affects the safety performance and service life of the electrical devices. In the prior art, the installation parts of electrical devices such as lead cables are usually sealed with glue, but after thermal expansion and contraction, gaps are likely to appear between the glue and the cable, and accumulated water can penetrate into the interior of the electrical device through the gaps in the cable, causing the risk of water leakage, causing the electrical device to short-circuit and become scrapped. Utility Model Content

[0004] The utility model is developed to solve the above-mentioned problem, and aims to provide a connecting cable and an electrical device, a motor and an electric vehicle, which can effectively improve the waterproof performance of the connecting cable.

[0005] The utility model provides a lead-in cable, which is installed on an electrical device and has the following characteristics: the lead-in cable comprises at least: a wiring harness, which at least contains a plurality of electrical wires composed of a plurality of power supply wires connected to an external power source; an isolating sealing sleeve, which is sleeved on the wiring harness and provided with a plurality of wire holes for isolating and accommodating the electrical wires; a protective sealing sleeve, which is arranged on a side close to the electrical device and comprises a sheathing portion sleeved on the outer side of the isolating sealing sleeve and an extending portion extending from the sheathing portion in a direction away from the electrical device; and a fastener, which is used for being fastened to the electrical device, wherein a step portion is provided between the sheathing portion and the extending portion, and the fastener abuts against the step portion, so that the sheathing portion of the protective sealing sleeve is interference-fitted with the electrical device.

[0006] The connecting cable provided by the utility model may also have the following features: a connecting hole is provided at the connection of the electrical device, and the wiring harness passes through the connecting hole for connection with the wires inside the electrical device; a first inclined surface with a gradually decreasing outer diameter is provided at one end of the covering portion close to the electrical device, and a second inclined surface with a gradually decreasing inner diameter is provided at the connecting hole, and the inclination angles of the first inclined surface and the second inclined surface are adapted, and when installed on the electrical device, the first inclined surface abuts against the second inclined surface.

[0007] The lead-in cable provided by the utility model may also have the following features: it also includes a gasket, which is installed between the fastener and the step portion, and one side of the gasket abuts against the fastener, and the other side abuts against the step end surface on the step portion, wherein the fastener is a nut, and the nut is threadedly connected to the connecting hole, and the gasket pushes the first inclined surface to press the second inclined surface by rotating the nut.

[0008] The lead-in cable provided by the utility model may also have the following characteristics: wherein the isolation sealing sleeve is made of rubber material, and the protection sealing sleeve is made of rubber material.

[0009] The lead-in cable provided by the utility model may also have the following feature: the wire holes further include data wire holes and power wire holes, and the plurality of power wire holes are distributed on the outer peripheral side of the data wire holes.

[0010] The lead-in cable provided by the utility model may also have the following features: it also includes a locking sleeve, which is sleeved on the outside of the isolation sealing sleeve and is used to squeeze the isolation sealing sleeve to shrink each wire hole and squeeze the wires in the wire hole.

[0011] The utility model provides an electric device, which has the following characteristics: a connecting cable is installed, and the connecting cable is the connecting cable mentioned above.

[0012] The utility model provides a motor, which has the following characteristics: a lead-in cable is installed, and the lead-in cable is the lead-in cable mentioned above.

[0013] The utility model provides an electric vehicle, which has the following characteristics: it comprises the above-mentioned motor.

[0014] Functions and effects of utility models

[0015] According to the connecting cable, electrical device, motor and electric vehicle involved in the utility model, the locking sleeve deforms and squeezes the isolating sealing sleeve to isolate and seal the wires, thereby achieving waterproof performance between the wires in the wiring harness and preventing water from leaking inside the wiring harness.

[0016] The fastener is used to fasten the connection with the electrical device and abut against the step portion, so that the covering portion of the protective sealing sleeve and the electrical device achieve an interference fit by the first inclined surface squeezing the second inclined surface, thereby realizing a waterproof seal between the connecting cable and the electrical device, preventing external accumulated water from entering the electrical device through the connecting gap between the connecting cable and the electrical device, and further improving the waterproof performance of the connecting cable and the electrical device.

[0017] 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 a certain elasticity, so that the sealing performance of the isolation sealing sleeve after being squeezed by the locking sleeve is more secure, and the sealing performance between the protection sealing sleeve and the connecting hole after being squeezed is also more secure.

[0018] The gasket is provided to avoid relative cutting movement between the fastener and the protective sealing sleeve when the fastener rotates, thereby preventing the fastener from being easily damaged. After the gasket is provided, there is only squeezing force but no cutting force between the gasket and the protective sealing sleeve.

[0019] Each wire in the wiring harness is separated by an isolating sealing sleeve, and each wire is squeezed and locked by a locking sleeve. The protective sealing sleeve is then formed outside the wiring harness, the isolating sealing sleeve and the locking sleeve by vulcanization. The protective sealing sleeve is then squeezed by a fastener to make an interference fit between the protective sealing sleeve and the connecting hole to achieve sealing between the protective sealing sleeve and the connecting hole. The above perfectly achieves a sealed connection between wires, between wires and the outer skin, and between the protective sealing sleeve and the connecting hole, thereby improving the waterproof performance of the connecting cable and the electrical device. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the structure in which the lead-in cable is installed on the motor in an embodiment of the utility model;

[0021] Figure 2 It is a schematic structural diagram of the lead-in cable in an embodiment of the utility model;

[0022] Figure 3 It is a schematic diagram of the exploded structure of the lead-in cable in the embodiment of the utility model;

[0023] Figure 4 It is a partial cross-sectional view of the lead-in cable in the embodiment of the utility model;

[0024] Figure 5 is another cross-sectional view of the lead-in cable in the embodiment of the utility model; and

[0025] Figure 6 It is a manufacturing flow chart of the lead-in cable in the embodiment of the utility model.

[0026] Explanation of the reference numerals: 100 - lead cable; 200 - stator; 201 - connection hole; 202 - wire hole; 203 - second inclined surface; 1 - isolation sealing sleeve; 2 - locking sleeve; 3 - protective sealing sleeve; 4 - fastener; 5 - gasket; 20 - wiring harness; 21 - power supply line; 22 - data line; 23 - outer skin; 11 - wire hole; 111 - power supply line hole; 112 - data line hole; 31 - covering portion; 32 - extension portion; 33 - step portion; 311 - first inclined surface. DETAILED DESCRIPTION

[0027] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the following embodiments specifically illustrate the technical solutions of the present invention in conjunction with the accompanying drawings.

[0028] The lead-in cable 100 is installed on an electrical device, which may be a motor or other electrical appliances, such as an underwater searchlight and a turbine. This embodiment takes a hub motor in an electric vehicle as an example.

[0029] Reference Figure 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 which are connected to each other.

[0030] The connecting hole 201 is located on a side close to the outside of the motor and connected to the outside of the motor, the wire hole 202 is located on a side close to the inside of the motor and connected to the inside of the motor, and the inner diameter of the wire hole 202 is smaller than the inner diameter of the connecting hole 201 .

[0031] A second inclined surface 203 with a gradually decreasing inner diameter is provided on one end of the connecting hole 201 close to the wire hole 202 , and an internal thread is provided on the side wall of the connecting hole 201 .

[0032] Reference Figure 2 and Figure 3 The lead-in cable 100 includes a wiring harness 20, an isolation sealing sleeve 1, a locking sleeve 2, a protective sealing sleeve 3, a fastener 4 and a gasket 5.

[0033] The wiring harness 20 includes a plurality of wires, including a power supply wire 21 and a data wire 22 connected to an external power source, wherein the plurality of power supply wires 21 are distributed on the outer peripheral side of the data wire 22. The wiring harness 20 passes through the connection hole 201 and the wire hole 202, and the power supply wire 21 and the data wire 22 are respectively connected to the wires and the data wire inside the electrical device.

[0034] Reference Figure 4 and Figure 5 The isolation sealing sleeve 1 is sleeved on the wiring harness 20, and the isolation sealing sleeve 1 is provided with a plurality of wire holes 11, and the wire holes 11 include a power wire hole 111 and a data wire hole 112, wherein the plurality of power wire holes 111 are distributed on the outer peripheral side of the data wire hole 112. The power wire 21 in the wiring harness 20 passes through the power wire hole 111, and the data wire 22 passes through the data wire hole 112, so that each wire is accommodated by the wire hole 11 and the wires are isolated.

[0035] In this embodiment, each wire hole accommodates one wire, thereby isolating each wire separately; in addition, two to three wires that do not require isolation can also be accommodated in the same wire hole, which can also play an isolation role.

[0036] The locking sleeve 2 is sleeved on the outside of the isolation sealing sleeve 1, and is used to squeeze the isolation sealing sleeve 1, so that each wire hole 11 squeezes and seals the power supply line 21 and the data line 22 in the wire hole 11. In this embodiment, the locking sleeve 2 is a metal sleeve, and after the locking sleeve 2 is squeezed, the isolation sealing sleeve 1 is deformed inward, thereby shrinking the wire hole 11 and squeezing the wires in the wire harness 20.

[0037] Reference Figure 3 , Figure 4 and Figure 5 The protective sealing sleeve 3 is arranged on a side close to the electrical device, and has a covering portion 31 sleeved on the outside of the isolation sealing sleeve 1 and an extending portion 32 extending from the covering portion 31 in a direction away from the electrical device, and a step portion 33 is provided between the covering portion 31 and the extending portion 32.

[0038] The extension portion 32 wraps around a portion of the exposed wire and a portion of the outer sheath 23 , so that the protective sealing sleeve 3 completely wraps around the transition portion between the exposed wire and the outer sheath 23 .

[0039] Among them, a first inclined surface 311 with a gradually decreasing outer diameter is provided at one end of the covering portion 31 close to the motor, and the inclination angle of the first inclined surface 311 is adapted to the second inclined surface 203. The fastener 4 is preferably a nut, which is threadedly connected to the connecting hole, and the first inclined surface 311 is pressed against the second inclined surface 203 by rotating the nut.

[0040] Furthermore, the fastener 4 abuts against the step portion 33, and a gasket 5 is installed between the fastener 4 and the step portion 33. The fastener 4 is screwed to make the gasket 5 abut against and squeeze the step end surface at the step portion 33, so that the first inclined surface 311 on the covering portion 31 squeezes the second inclined surface 203, thereby achieving an interference fit between the protective sealing sleeve 3 and the connecting hole 201 in the stator 200.

[0041] Furthermore, 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 a certain elasticity, and the protection sealing sleeve 3 is formed on the outside of the isolation sealing sleeve 1 and the locking sleeve 2 by vulcanization.

[0042] Reference Figure 6 The manufacturing method of the lead cable 100 comprises the following steps:

[0043] S1, prepare the wiring harness 20, the isolation sealing sleeve 1, the locking sleeve 2, the fastener 4 and the gasket 5;

[0044] S2, putting the fastener 4 and the gasket 5 on the wiring harness 20;

[0045] S3, peeling off the outer skin 23 of the wiring harness 20 near the electrical device, exposing the multiple power supply wires 21 and data wires 22 in the wiring harness 20;

[0046] S4, insert the multiple power lines 21 and data lines 22 into the corresponding wire holes 11 on the isolation sealing sleeve 1 respectively,

[0047] S5, putting the locking sleeve 2 on the isolation sealing sleeve 1, and using an extrusion tool to squeeze the locking sleeve 2 inwards, so that the wire hole 11 on the isolation sealing sleeve 1 is deformed and contracted, thereby squeezing and sealing the multiple power lines 21 and data lines 22;

[0048] S6. Apply a layer of adhesive on the outer layers of the isolation sealing sleeve 1 and the locking sleeve 2;

[0049] S7, wrapping a protective sealing sleeve 3 on the outer layer of the isolation sealing sleeve 1 and the locking sleeve 2 through a vulcanization process, and forming a covering portion 31, an extension portion 32 and a step portion 33 on the outer ring side of the protective sealing sleeve 3;

[0050] S8. Sleeve the gasket 5 and the fastener 4 on the outer ring side of the protective sealing sleeve 3 to form a lead-in cable.

[0051] In the above step S5, when the locking sleeve 2 is squeezed, the circular locking sleeve 2 is deformed into an octagon by squeezing inward in eight directions by the extrusion tool. The deformation of the locking sleeve 2 isolates and seals the wires in the wiring harness.

[0052] Specifically, the protective sealing sleeve 3 is made of rubber material, such as NBR, FKM, EPDM, etc.; 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.

[0053] Functions and Effects of the Embodiments

[0054] The outer skin 23 is generally made of high temperature resistant fluororubber material. Fluororubber and other rubber materials have the property of non-adhesion. For example, there is a risk of water seepage in the gap between the outer skin 23 and the wire skin, and then between the outer skin 23 and the wire skin. The deformation of the locking sleeve 2 isolates and seals the wires in the wire harness, thereby achieving waterproof performance between the wires in the wire harness and preventing water from leaking inside the wire harness 20. This avoids the risk of water seepage caused by the non-adhesion property of fluororubber and other rubber materials.

[0055] The protective sealing sleeve 3 is wrapped around the isolation sealing sleeve 1 and the locking sleeve 2 by vulcanization, and a covering portion 31 and an extending portion 32 are formed on the protective sealing sleeve 3, so that the transition portion between the wrapped bare wires and the outer sheath 23 is realized and strengthened, and the sealing performance between the outer sheath 23 and the bare wires is realized and strengthened, so as to prevent accumulated water from penetrating into the inside of the wiring harness from the outside.

[0056] The fastener 4 is tightly connected to the electrical device and abuts against the step portion 33, so that the covering portion 31 of the protective sealing sleeve 3 and the electrical device squeeze the second inclined surface 203 through the first inclined surface 311. The interference fit realizes a waterproof seal between the connecting cable and the electrical device, preventing external accumulated water from entering the electrical device through the connecting gap between the connecting cable and the electrical device, and further improving the waterproof performance of the connecting cable and the electrical device.

[0057] 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 squeezed by the locking sleeve 2 is more secure, and the sealing performance between the protective sealing sleeve 3 and the connecting hole 201 after being squeezed is also more secure. Furthermore, 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 on the outside of the isolation sealing sleeve 1 and the wiring harness 20 by vulcanization, which can improve the tightness of the combination of the protective sealing sleeve 3 with the isolation sealing sleeve 1 and the wiring harness 20, and the waterproof performance is better.

[0058] The gasket 5 is set, and when the fastener 4 is screwed, relative cutting movement between the fastener 4 and the protective sealing sleeve 3 is avoided, thereby avoiding damage to the fastener. After the gasket 5 is set, there is only extrusion force but no cutting force between the gasket and the fastener. Both the gasket 5 and the fastener 4 are metal. When rotating and squeezing, no damage will occur between the gasket 5 and the fastener 4.

[0059] Each wire in the wiring harness 20 is separated by the isolating sealing sleeve 1, and each wire is squeezed and tightened by the locking sleeve 2, and then the protective sealing sleeve 3 is formed outside the wiring harness 20, the isolating sealing sleeve 1 and the locking sleeve 2 by vulcanization, and then the protective sealing sleeve 3 is squeezed by the fastener 4 to make the protective sealing sleeve 3 and the connecting hole 201 interference fit to achieve the sealing of the protective sealing sleeve 3 and the connecting hole 201, which perfectly realizes the sealed connection between each exposed wire, between the wire and the outer skin, and between the protective sealing sleeve 3 and the connecting hole 201, thereby improving the waterproof performance of the connecting cable and the waterproof performance of the electrical device.

[0060] According to experiments, the lead-in cable of this embodiment can prevent water leakage in water depths of 1.5 meters to 30 meters. Therefore, for example, when the hub motor on an electric vehicle is in a wading environment, water can be prevented from entering the motor, thereby improving the life and safety performance of the motor and the entire vehicle.

[0061] The above embodiments are preferred cases of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A connecting cable installed on an electrical device, characterized in that: At least: A wiring harness, comprising at least a plurality of wires consisting of a plurality of power supply wires connected to an external power source; An isolation sealing sleeve, which is sleeved on the wiring harness and is provided with a plurality of wire holes for isolating and accommodating the wires; A protective sealing sleeve, arranged on a side close to the electrical device, and comprising a covering portion sleeved on the outside of the isolation sealing sleeve and an extending portion extending from the covering portion in a direction away from the electrical device; as well as A fastener, used for fastening and connecting with the electrical device, Wherein, a step portion is provided between the covering portion and the extending portion, and the fastener abuts against the step portion, so that the covering portion of the protective sealing sleeve and the electrical device are interference-fitted.

2. The lead cable according to claim 1, characterized in that: in, A connection hole is provided at the connection of the electrical device, and the wiring harness passes through the connection hole to be connected to the wires inside the electrical device; The end of the covering portion close to the electrical device is provided with a first inclined surface with a gradually decreasing outer diameter, and the connecting hole is provided with a second inclined surface with a gradually decreasing inner diameter. The inclination angles of the first inclined surface and the second inclined surface are adapted. When installed on the electrical device, the first inclined surface conflicts with the second inclined surface.

3. The lead-in cable according to claim 2, characterized in that: Also includes a gasket installed between the fastener and the step portion, with one side of the gasket abutting against the fastener and the other side abutting against the step end surface on the step portion, Wherein, the fastener is a nut, and the nut is threadedly connected to the connecting hole. By rotating the nut, the gasket pushes the first inclined surface to press the second inclined surface.

4. The lead-in cable according to claim 3, characterized in that: in, The isolation sealing sleeve is made of rubber material, and the protection sealing sleeve is made of rubber material.

5. The lead-in cable according to claim 3, characterized in that: The wire holes further include a data wire hole and a power wire hole, and a plurality of the power wire holes are distributed on the outer peripheral side of the data wire hole.

6. The lead-in cable according to claim 3, characterized in that: It also includes a locking sleeve, which is sleeved on the outside of the isolation sealing sleeve and is used to squeeze the isolation sealing sleeve to shrink each of the wire holes and squeeze the wires in the wire holes.

7. An electrical device, characterized in that: A lead-in cable is installed, and the lead-in cable is the lead-in cable according to any one of claims 1 to 6.

8. A motor, characterized in that: A lead-in cable is installed, and the lead-in cable is the lead-in cable according to any one of claims 1 to 6.

9. An electric vehicle, characterized in that: Comprising the motor as claimed in claim 8.

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